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(root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * Cipher Feedback block mode.\n\t */\n\tCryptoJS.mode.CFB = (function () {\n\t    var CFB = CryptoJS.lib.BlockCipherMode.extend();\n\n\t    CFB.Encryptor = CFB.extend({\n\t        processBlock: function (words, offset) {\n\t            // Shortcuts\n\t            var cipher = this._cipher;\n\t            var blockSize = cipher.blockSize;\n\n\t            generateKeystreamAndEncrypt.call(this, words, offset, blockSize, cipher);\n\n\t            // Remember this block to use with next block\n\t            this._prevBlock = words.slice(offset, offset + blockSize);\n\t        }\n\t    });\n\n\t    CFB.Decryptor = CFB.extend({\n\t        processBlock: function (words, offset) {\n\t            // Shortcuts\n\t            var cipher = this._cipher;\n\t            var blockSize = cipher.blockSize;\n\n\t            // Remember this block to use with next block\n\t            var thisBlock = words.slice(offset, offset + blockSize);\n\n\t            generateKeystreamAndEncrypt.call(this, words, offset, blockSize, cipher);\n\n\t            // This block becomes the previous block\n\t            this._prevBlock = thisBlock;\n\t        }\n\t    });\n\n\t    function generateKeystreamAndEncrypt(words, offset, blockSize, cipher) {\n\t        var keystream;\n\n\t        // Shortcut\n\t        var iv = this._iv;\n\n\t        // Generate keystream\n\t        if (iv) {\n\t            keystream = iv.slice(0);\n\n\t            // Remove IV for subsequent blocks\n\t            this._iv = undefined;\n\t        } else {\n\t            keystream = this._prevBlock;\n\t        }\n\t        cipher.encryptBlock(keystream, 0);\n\n\t        // Encrypt\n\t        for (var i = 0; i < blockSize; i++) {\n\t            words[offset + i] ^= keystream[i];\n\t        }\n\t    }\n\n\t    return CFB;\n\t}());\n\n\n\treturn CryptoJS.mode.CFB;\n\n}));","var generatePrime = require('./lib/generatePrime')\nvar primes = require('./lib/primes.json')\n\nvar DH = require('./lib/dh')\n\nfunction getDiffieHellman (mod) {\n  var prime = new Buffer(primes[mod].prime, 'hex')\n  var gen = new Buffer(primes[mod].gen, 'hex')\n\n  return new DH(prime, gen)\n}\n\nvar ENCODINGS = {\n  'binary': true, 'hex': true, 'base64': true\n}\n\nfunction createDiffieHellman (prime, enc, generator, genc) {\n  if (Buffer.isBuffer(enc) || ENCODINGS[enc] === undefined) {\n    return createDiffieHellman(prime, 'binary', enc, generator)\n  }\n\n  enc = enc || 'binary'\n  genc = genc || 'binary'\n  generator = generator || new Buffer([2])\n\n  if (!Buffer.isBuffer(generator)) {\n    generator = new Buffer(generator, genc)\n  }\n\n  if (typeof prime === 'number') {\n    return new DH(generatePrime(prime, generator), generator, true)\n  }\n\n  if (!Buffer.isBuffer(prime)) {\n    prime = new Buffer(prime, enc)\n  }\n\n  return new DH(prime, generator, true)\n}\n\nexports.DiffieHellmanGroup = exports.createDiffieHellmanGroup = exports.getDiffieHellman = getDiffieHellman\nexports.createDiffieHellman = exports.DiffieHellman = createDiffieHellman\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar test = {};\n\ntest[TO_STRING_TAG] = 'z';\n\nmodule.exports = String(test) === '[object z]';\n","/**\n * mux.js\n *\n * Copyright (c) 2014 Brightcove\n * All rights reserved.\n *\n * A lightweight readable stream implemention that handles event dispatching.\n * Objects that inherit from streams should call init in their constructors.\n */\n'use strict';\n\nvar Stream = function() {\n  this.init = function() {\n    var listeners = {};\n    /**\n     * Add a listener for a specified event type.\n     * @param type {string} the event name\n     * @param listener {function} the callback to be invoked when an event of\n     * the specified type occurs\n     */\n    this.on = function(type, listener) {\n      if (!listeners[type]) {\n        listeners[type] = [];\n      }\n      listeners[type] = listeners[type].concat(listener);\n    };\n    /**\n     * Remove a listener for a specified event type.\n     * @param type {string} the event name\n     * @param listener {function} a function previously registered for this\n     * type of event through `on`\n     */\n    this.off = function(type, listener) {\n      var index;\n      if (!listeners[type]) {\n        return false;\n      }\n      index = listeners[type].indexOf(listener);\n      listeners[type] = listeners[type].slice();\n      listeners[type].splice(index, 1);\n      return index > -1;\n    };\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     * @param type {string} the event name\n     */\n    this.trigger = function(type) {\n      var callbacks, i, length, args;\n      callbacks = listeners[type];\n      if (!callbacks) {\n        return;\n      }\n      // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n      if (arguments.length === 2) {\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        args = [];\n        i = arguments.length;\n        for (i = 1; i < arguments.length; ++i) {\n          args.push(arguments[i]);\n        }\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].apply(this, args);\n        }\n      }\n    };\n    /**\n     * Destroys the stream and cleans up.\n     */\n    this.dispose = function() {\n      listeners = {};\n    };\n  };\n};\n\n/**\n * Forwards all `data` events on this stream to the destination stream. The\n * destination stream should provide a method `push` to receive the data\n * events as they arrive.\n * @param destination {stream} the stream that will receive all `data` events\n * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n *                            when the current stream emits a 'done' event\n * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n */\nStream.prototype.pipe = function(destination) {\n  this.on('data', function(data) {\n    destination.push(data);\n  });\n\n  this.on('done', function(flushSource) {\n    destination.flush(flushSource);\n  });\n\n  return destination;\n};\n\n// Default stream functions that are expected to be overridden to perform\n// actual work. These are provided by the prototype as a sort of no-op\n// implementation so that we don't have to check for their existence in the\n// `pipe` function above.\nStream.prototype.push = function(data) {\n  this.trigger('data', data);\n};\n\nStream.prototype.flush = function(flushSource) {\n  this.trigger('done', flushSource);\n};\n\nmodule.exports = Stream;\n","exports.encrypt = function (self, block) {\n  return self._cipher.encryptBlock(block)\n}\n\nexports.decrypt = function (self, block) {\n  return self._cipher.decryptBlock(block)\n}\n","'use strict';\n\nvar assert = require('minimalistic-assert');\n\nfunction Cipher(options) {\n  this.options = options;\n\n  this.type = this.options.type;\n  this.blockSize = 8;\n  this._init();\n\n  this.buffer = new Array(this.blockSize);\n  this.bufferOff = 0;\n}\nmodule.exports = Cipher;\n\nCipher.prototype._init = function _init() {\n  // Might be overrided\n};\n\nCipher.prototype.update = function update(data) {\n  if (data.length === 0)\n    return [];\n\n  if (this.type === 'decrypt')\n    return this._updateDecrypt(data);\n  else\n    return this._updateEncrypt(data);\n};\n\nCipher.prototype._buffer = function _buffer(data, off) {\n  // Append data to buffer\n  var min = Math.min(this.buffer.length - this.bufferOff, data.length - off);\n  for (var i = 0; i < min; i++)\n    this.buffer[this.bufferOff + i] = data[off + i];\n  this.bufferOff += min;\n\n  // Shift next\n  return min;\n};\n\nCipher.prototype._flushBuffer = function _flushBuffer(out, off) {\n  this._update(this.buffer, 0, out, off);\n  this.bufferOff = 0;\n  return this.blockSize;\n};\n\nCipher.prototype._updateEncrypt = function _updateEncrypt(data) {\n  var inputOff = 0;\n  var outputOff = 0;\n\n  var count = ((this.bufferOff + data.length) / this.blockSize) | 0;\n  var out = new Array(count * this.blockSize);\n\n  if (this.bufferOff !== 0) {\n    inputOff += this._buffer(data, inputOff);\n\n    if (this.bufferOff === this.buffer.length)\n      outputOff += this._flushBuffer(out, outputOff);\n  }\n\n  // Write blocks\n  var max = data.length - ((data.length - inputOff) % this.blockSize);\n  for (; inputOff < max; inputOff += this.blockSize) {\n    this._update(data, inputOff, out, outputOff);\n    outputOff += this.blockSize;\n  }\n\n  // Queue rest\n  for (; inputOff < data.length; inputOff++, this.bufferOff++)\n    this.buffer[this.bufferOff] = data[inputOff];\n\n  return out;\n};\n\nCipher.prototype._updateDecrypt = function _updateDecrypt(data) {\n  var inputOff = 0;\n  var outputOff = 0;\n\n  var count = Math.ceil((this.bufferOff + data.length) / this.blockSize) - 1;\n  var out = new Array(count * this.blockSize);\n\n  // TODO(indutny): optimize it, this is far from optimal\n  for (; count > 0; count--) {\n    inputOff += this._buffer(data, inputOff);\n    outputOff += this._flushBuffer(out, outputOff);\n  }\n\n  // Buffer rest of the input\n  inputOff += this._buffer(data, inputOff);\n\n  return out;\n};\n\nCipher.prototype.final = function final(buffer) {\n  var first;\n  if (buffer)\n    first = this.update(buffer);\n\n  var last;\n  if (this.type === 'encrypt')\n    last = this._finalEncrypt();\n  else\n    last = this._finalDecrypt();\n\n  if (first)\n    return first.concat(last);\n  else\n    return last;\n};\n\nCipher.prototype._pad = function _pad(buffer, off) {\n  if (off === 0)\n    return false;\n\n  while (off < buffer.length)\n    buffer[off++] = 0;\n\n  return true;\n};\n\nCipher.prototype._finalEncrypt = function _finalEncrypt() {\n  if (!this._pad(this.buffer, this.bufferOff))\n    return [];\n\n  var out = new Array(this.blockSize);\n  this._update(this.buffer, 0, out, 0);\n  return out;\n};\n\nCipher.prototype._unpad = function _unpad(buffer) {\n  return buffer;\n};\n\nCipher.prototype._finalDecrypt = function _finalDecrypt() {\n  assert.equal(this.bufferOff, this.blockSize, 'Not enough data to decrypt');\n  var out = new Array(this.blockSize);\n  this._flushBuffer(out, 0);\n\n  return this._unpad(out);\n};\n","'use strict';\n\nconst constants = exports;\n\n// Helper\nconstants._reverse = function reverse(map) {\n  const res = {};\n\n  Object.keys(map).forEach(function(key) {\n    // Convert key to integer if it is stringified\n    if ((key | 0) == key)\n      key = key | 0;\n\n    const value = map[key];\n    res[value] = key;\n  });\n\n  return res;\n};\n\nconstants.der = require('./der');\n","var aFunction = require('../internals/a-function');\n\n// optional / simple context binding\nmodule.exports = function (fn, that, length) {\n  aFunction(fn);\n  if (that === undefined) return fn;\n  switch (length) {\n    case 0: return function () {\n      return fn.call(that);\n    };\n    case 1: return function (a) {\n      return fn.call(that, a);\n    };\n    case 2: return function (a, b) {\n      return fn.call(that, a, b);\n    };\n    case 3: return function (a, b, c) {\n      return fn.call(that, a, b, c);\n    };\n  }\n  return function (/* ...args */) {\n    return fn.apply(that, arguments);\n  };\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar flattenIntoArray = require('../internals/flatten-into-array');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\n// `Array.prototype.flat` method\n// https://tc39.es/ecma262/#sec-array.prototype.flat\n$({ target: 'Array', proto: true }, {\n  flat: function flat(/* depthArg = 1 */) {\n    var depthArg = arguments.length ? arguments[0] : undefined;\n    var O = toObject(this);\n    var sourceLen = toLength(O.length);\n    var A = arraySpeciesCreate(O, 0);\n    A.length = flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : toInteger(depthArg));\n    return A;\n  }\n});\n","'use strict';\nvar aFunction = require('../internals/a-function');\nvar isObject = require('../internals/is-object');\n\nvar slice = [].slice;\nvar factories = {};\n\nvar construct = function (C, argsLength, args) {\n  if (!(argsLength in factories)) {\n    for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';\n    // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only\n    factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');\n  } return factories[argsLength](C, args);\n};\n\n// `Function.prototype.bind` method implementation\n// https://tc39.es/ecma262/#sec-function.prototype.bind\nmodule.exports = Function.bind || function bind(that /* , ...args */) {\n  var fn = aFunction(this);\n  var partArgs = slice.call(arguments, 1);\n  var boundFunction = function bound(/* args... */) {\n    var args = partArgs.concat(slice.call(arguments));\n    return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);\n  };\n  if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;\n  return boundFunction;\n};\n","/* eslint-disable es/no-object-getownpropertynames -- safe */\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar $getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\n\nvar toString = {}.toString;\n\nvar windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames\n  ? Object.getOwnPropertyNames(window) : [];\n\nvar getWindowNames = function (it) {\n  try {\n    return $getOwnPropertyNames(it);\n  } catch (error) {\n    return windowNames.slice();\n  }\n};\n\n// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window\nmodule.exports.f = function getOwnPropertyNames(it) {\n  return windowNames && toString.call(it) == '[object Window]'\n    ? getWindowNames(it)\n    : $getOwnPropertyNames(toIndexedObject(it));\n};\n","'use strict';\n\nvar ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;\n\nfunction highWaterMarkFrom(options, isDuplex, duplexKey) {\n  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;\n}\n\nfunction getHighWaterMark(state, options, duplexKey, isDuplex) {\n  var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);\n\n  if (hwm != null) {\n    if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {\n      var name = isDuplex ? duplexKey : 'highWaterMark';\n      throw new ERR_INVALID_OPT_VALUE(name, hwm);\n    }\n\n    return Math.floor(hwm);\n  } // Default value\n\n\n  return state.objectMode ? 16 : 16 * 1024;\n}\n\nmodule.exports = {\n  getHighWaterMark: getHighWaterMark\n};","/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */\n/* eslint-disable node/no-deprecated-api */\nvar buffer = require('buffer')\nvar Buffer = buffer.Buffer\n\n// alternative to using Object.keys for old browsers\nfunction copyProps (src, dst) {\n  for (var key in src) {\n    dst[key] = src[key]\n  }\n}\nif (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {\n  module.exports = buffer\n} else {\n  // Copy properties from require('buffer')\n  copyProps(buffer, exports)\n  exports.Buffer = SafeBuffer\n}\n\nfunction SafeBuffer (arg, encodingOrOffset, length) {\n  return Buffer(arg, encodingOrOffset, length)\n}\n\nSafeBuffer.prototype = Object.create(Buffer.prototype)\n\n// Copy static methods from Buffer\ncopyProps(Buffer, SafeBuffer)\n\nSafeBuffer.from = function (arg, encodingOrOffset, length) {\n  if (typeof arg === 'number') {\n    throw new TypeError('Argument must not be a number')\n  }\n  return Buffer(arg, encodingOrOffset, length)\n}\n\nSafeBuffer.alloc = function (size, fill, encoding) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  var buf = Buffer(size)\n  if (fill !== undefined) {\n    if (typeof encoding === 'string') {\n      buf.fill(fill, encoding)\n    } else {\n      buf.fill(fill)\n    }\n  } else {\n    buf.fill(0)\n  }\n  return buf\n}\n\nSafeBuffer.allocUnsafe = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  return Buffer(size)\n}\n\nSafeBuffer.allocUnsafeSlow = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  return buffer.SlowBuffer(size)\n}\n","import arrayLikeToArray from \"./arrayLikeToArray.js\";\nexport default function _unsupportedIterableToArray(o, minLen) {\n  if (!o) return;\n  if (typeof o === \"string\") return arrayLikeToArray(o, minLen);\n  var n = Object.prototype.toString.call(o).slice(8, -1);\n  if (n === \"Object\" && o.constructor) n = o.constructor.name;\n  if (n === \"Map\" || n === \"Set\") return Array.from(o);\n  if (n === \"Arguments\" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return arrayLikeToArray(o, minLen);\n}","var DESCRIPTORS = require('../internals/descriptors');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar has = require('../internals/has');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\n\n// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe\nvar $getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor\nexports.f = DESCRIPTORS ? $getOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {\n  O = toIndexedObject(O);\n  P = toPrimitive(P, true);\n  if (IE8_DOM_DEFINE) try {\n    return $getOwnPropertyDescriptor(O, P);\n  } catch (error) { /* empty */ }\n  if (has(O, P)) return createPropertyDescriptor(!propertyIsEnumerableModule.f.call(O, P), O[P]);\n};\n","'use strict';\n\nvar utils = require('../utils');\nvar SHA256 = require('./256');\n\nfunction SHA224() {\n  if (!(this instanceof SHA224))\n    return new SHA224();\n\n  SHA256.call(this);\n  this.h = [\n    0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,\n    0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4 ];\n}\nutils.inherits(SHA224, SHA256);\nmodule.exports = SHA224;\n\nSHA224.blockSize = 512;\nSHA224.outSize = 224;\nSHA224.hmacStrength = 192;\nSHA224.padLength = 64;\n\nSHA224.prototype._digest = function digest(enc) {\n  // Just truncate output\n  if (enc === 'hex')\n    return utils.toHex32(this.h.slice(0, 7), 'big');\n  else\n    return utils.split32(this.h.slice(0, 7), 'big');\n};\n\n","/*\n * A JavaScript implementation of the Secure Hash Algorithm, SHA-0, as defined\n * in FIPS PUB 180-1\n * This source code is derived from sha1.js of the same repository.\n * The difference between SHA-0 and SHA-1 is just a bitwise rotate left\n * operation was added.\n */\n\nvar inherits = require('inherits')\nvar Hash = require('./hash')\nvar Buffer = require('safe-buffer').Buffer\n\nvar K = [\n  0x5a827999, 0x6ed9eba1, 0x8f1bbcdc | 0, 0xca62c1d6 | 0\n]\n\nvar W = new Array(80)\n\nfunction Sha () {\n  this.init()\n  this._w = W\n\n  Hash.call(this, 64, 56)\n}\n\ninherits(Sha, Hash)\n\nSha.prototype.init = function () {\n  this._a = 0x67452301\n  this._b = 0xefcdab89\n  this._c = 0x98badcfe\n  this._d = 0x10325476\n  this._e = 0xc3d2e1f0\n\n  return this\n}\n\nfunction rotl5 (num) {\n  return (num << 5) | (num >>> 27)\n}\n\nfunction rotl30 (num) {\n  return (num << 30) | (num >>> 2)\n}\n\nfunction ft (s, b, c, d) {\n  if (s === 0) return (b & c) | ((~b) & d)\n  if (s === 2) return (b & c) | (b & d) | (c & d)\n  return b ^ c ^ d\n}\n\nSha.prototype._update = function (M) {\n  var W = this._w\n\n  var a = this._a | 0\n  var b = this._b | 0\n  var c = this._c | 0\n  var d = this._d | 0\n  var e = this._e | 0\n\n  for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)\n  for (; i < 80; ++i) W[i] = W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16]\n\n  for (var j = 0; j < 80; ++j) {\n    var s = ~~(j / 20)\n    var t = (rotl5(a) + ft(s, b, c, d) + e + W[j] + K[s]) | 0\n\n    e = d\n    d = c\n    c = rotl30(b)\n    b = a\n    a = t\n  }\n\n  this._a = (a + this._a) | 0\n  this._b = (b + this._b) | 0\n  this._c = (c + this._c) | 0\n  this._d = (d + this._d) | 0\n  this._e = (e + this._e) | 0\n}\n\nSha.prototype._hash = function () {\n  var H = Buffer.allocUnsafe(20)\n\n  H.writeInt32BE(this._a | 0, 0)\n  H.writeInt32BE(this._b | 0, 4)\n  H.writeInt32BE(this._c | 0, 8)\n  H.writeInt32BE(this._d | 0, 12)\n  H.writeInt32BE(this._e | 0, 16)\n\n  return H\n}\n\nmodule.exports = Sha\n","import getBasePlacement from \"../utils/getBasePlacement.js\";\nimport getLayoutRect from \"../dom-utils/getLayoutRect.js\";\nimport contains from \"../dom-utils/contains.js\";\nimport getOffsetParent from \"../dom-utils/getOffsetParent.js\";\nimport getMainAxisFromPlacement from \"../utils/getMainAxisFromPlacement.js\";\nimport { within } from \"../utils/within.js\";\nimport mergePaddingObject from \"../utils/mergePaddingObject.js\";\nimport expandToHashMap from \"../utils/expandToHashMap.js\";\nimport { left, right, basePlacements, top, bottom } from \"../enums.js\";\nimport { isHTMLElement } from \"../dom-utils/instanceOf.js\"; // eslint-disable-next-line import/no-unused-modules\n\nvar toPaddingObject = function toPaddingObject(padding, state) {\n  padding = typeof padding === 'function' ? padding(Object.assign({}, state.rects, {\n    placement: state.placement\n  })) : padding;\n  return mergePaddingObject(typeof padding !== 'number' ? padding : expandToHashMap(padding, basePlacements));\n};\n\nfunction arrow(_ref) {\n  var _state$modifiersData$;\n\n  var state = _ref.state,\n      name = _ref.name,\n      options = _ref.options;\n  var arrowElement = state.elements.arrow;\n  var popperOffsets = state.modifiersData.popperOffsets;\n  var basePlacement = getBasePlacement(state.placement);\n  var axis = getMainAxisFromPlacement(basePlacement);\n  var isVertical = [left, right].indexOf(basePlacement) >= 0;\n  var len = isVertical ? 'height' : 'width';\n\n  if (!arrowElement || !popperOffsets) {\n    return;\n  }\n\n  var paddingObject = toPaddingObject(options.padding, state);\n  var arrowRect = getLayoutRect(arrowElement);\n  var minProp = axis === 'y' ? top : left;\n  var maxProp = axis === 'y' ? bottom : right;\n  var endDiff = state.rects.reference[len] + state.rects.reference[axis] - popperOffsets[axis] - state.rects.popper[len];\n  var startDiff = popperOffsets[axis] - state.rects.reference[axis];\n  var arrowOffsetParent = getOffsetParent(arrowElement);\n  var clientSize = arrowOffsetParent ? axis === 'y' ? arrowOffsetParent.clientHeight || 0 : arrowOffsetParent.clientWidth || 0 : 0;\n  var centerToReference = endDiff / 2 - startDiff / 2; // Make sure the arrow doesn't overflow the popper if the center point is\n  // outside of the popper bounds\n\n  var min = paddingObject[minProp];\n  var max = clientSize - arrowRect[len] - paddingObject[maxProp];\n  var center = clientSize / 2 - arrowRect[len] / 2 + centerToReference;\n  var offset = within(min, center, max); // Prevents breaking syntax highlighting...\n\n  var axisProp = axis;\n  state.modifiersData[name] = (_state$modifiersData$ = {}, _state$modifiersData$[axisProp] = offset, _state$modifiersData$.centerOffset = offset - center, _state$modifiersData$);\n}\n\nfunction effect(_ref2) {\n  var state = _ref2.state,\n      options = _ref2.options;\n  var _options$element = options.element,\n      arrowElement = _options$element === void 0 ? '[data-popper-arrow]' : _options$element;\n\n  if (arrowElement == null) {\n    return;\n  } // CSS selector\n\n\n  if (typeof arrowElement === 'string') {\n    arrowElement = state.elements.popper.querySelector(arrowElement);\n\n    if (!arrowElement) {\n      return;\n    }\n  }\n\n  if (process.env.NODE_ENV !== \"production\") {\n    if (!isHTMLElement(arrowElement)) {\n      console.error(['Popper: \"arrow\" element must be an HTMLElement (not an SVGElement).', 'To use an SVG arrow, wrap it in an HTMLElement that will be used as', 'the arrow.'].join(' '));\n    }\n  }\n\n  if (!contains(state.elements.popper, arrowElement)) {\n    if (process.env.NODE_ENV !== \"production\") {\n      console.error(['Popper: \"arrow\" modifier\\'s `element` must be a child of the popper', 'element.'].join(' '));\n    }\n\n    return;\n  }\n\n  state.elements.arrow = arrowElement;\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'arrow',\n  enabled: true,\n  phase: 'main',\n  fn: arrow,\n  effect: effect,\n  requires: ['popperOffsets'],\n  requiresIfExists: ['preventOverflow']\n};","module.exports = require('./lib/_stream_duplex.js');\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// a transform stream is a readable/writable stream where you do\n// something with the data.  Sometimes it's called a \"filter\",\n// but that's not a great name for it, since that implies a thing where\n// some bits pass through, and others are simply ignored.  (That would\n// be a valid example of a transform, of course.)\n//\n// While the output is causally related to the input, it's not a\n// necessarily symmetric or synchronous transformation.  For example,\n// a zlib stream might take multiple plain-text writes(), and then\n// emit a single compressed chunk some time in the future.\n//\n// Here's how this works:\n//\n// The Transform stream has all the aspects of the readable and writable\n// stream classes.  When you write(chunk), that calls _write(chunk,cb)\n// internally, and returns false if there's a lot of pending writes\n// buffered up.  When you call read(), that calls _read(n) until\n// there's enough pending readable data buffered up.\n//\n// In a transform stream, the written data is placed in a buffer.  When\n// _read(n) is called, it transforms the queued up data, calling the\n// buffered _write cb's as it consumes chunks.  If consuming a single\n// written chunk would result in multiple output chunks, then the first\n// outputted bit calls the readcb, and subsequent chunks just go into\n// the read buffer, and will cause it to emit 'readable' if necessary.\n//\n// This way, back-pressure is actually determined by the reading side,\n// since _read has to be called to start processing a new chunk.  However,\n// a pathological inflate type of transform can cause excessive buffering\n// here.  For example, imagine a stream where every byte of input is\n// interpreted as an integer from 0-255, and then results in that many\n// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in\n// 1kb of data being output.  In this case, you could write a very small\n// amount of input, and end up with a very large amount of output.  In\n// such a pathological inflating mechanism, there'd be no way to tell\n// the system to stop doing the transform.  A single 4MB write could\n// cause the system to run out of memory.\n//\n// However, even in such a pathological case, only a single written chunk\n// would be consumed, and then the rest would wait (un-transformed) until\n// the results of the previous transformed chunk were consumed.\n'use strict';\n\nmodule.exports = Transform;\n\nvar _require$codes = require('../errors').codes,\n    ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,\n    ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,\n    ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,\n    ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;\n\nvar Duplex = require('./_stream_duplex');\n\nrequire('inherits')(Transform, Duplex);\n\nfunction afterTransform(er, data) {\n  var ts = this._transformState;\n  ts.transforming = false;\n  var cb = ts.writecb;\n\n  if (cb === null) {\n    return this.emit('error', new ERR_MULTIPLE_CALLBACK());\n  }\n\n  ts.writechunk = null;\n  ts.writecb = null;\n  if (data != null) // single equals check for both `null` and `undefined`\n    this.push(data);\n  cb(er);\n  var rs = this._readableState;\n  rs.reading = false;\n\n  if (rs.needReadable || rs.length < rs.highWaterMark) {\n    this._read(rs.highWaterMark);\n  }\n}\n\nfunction Transform(options) {\n  if (!(this instanceof Transform)) return new Transform(options);\n  Duplex.call(this, options);\n  this._transformState = {\n    afterTransform: afterTransform.bind(this),\n    needTransform: false,\n    transforming: false,\n    writecb: null,\n    writechunk: null,\n    writeencoding: null\n  }; // start out asking for a readable event once data is transformed.\n\n  this._readableState.needReadable = true; // we have implemented the _read method, and done the other things\n  // that Readable wants before the first _read call, so unset the\n  // sync guard flag.\n\n  this._readableState.sync = false;\n\n  if (options) {\n    if (typeof options.transform === 'function') this._transform = options.transform;\n    if (typeof options.flush === 'function') this._flush = options.flush;\n  } // When the writable side finishes, then flush out anything remaining.\n\n\n  this.on('prefinish', prefinish);\n}\n\nfunction prefinish() {\n  var _this = this;\n\n  if (typeof this._flush === 'function' && !this._readableState.destroyed) {\n    this._flush(function (er, data) {\n      done(_this, er, data);\n    });\n  } else {\n    done(this, null, null);\n  }\n}\n\nTransform.prototype.push = function (chunk, encoding) {\n  this._transformState.needTransform = false;\n  return Duplex.prototype.push.call(this, chunk, encoding);\n}; // This is the part where you do stuff!\n// override this function in implementation classes.\n// 'chunk' is an input chunk.\n//\n// Call `push(newChunk)` to pass along transformed output\n// to the readable side.  You may call 'push' zero or more times.\n//\n// Call `cb(err)` when you are done with this chunk.  If you pass\n// an error, then that'll put the hurt on the whole operation.  If you\n// never call cb(), then you'll never get another chunk.\n\n\nTransform.prototype._transform = function (chunk, encoding, cb) {\n  cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));\n};\n\nTransform.prototype._write = function (chunk, encoding, cb) {\n  var ts = this._transformState;\n  ts.writecb = cb;\n  ts.writechunk = chunk;\n  ts.writeencoding = encoding;\n\n  if (!ts.transforming) {\n    var rs = this._readableState;\n    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);\n  }\n}; // Doesn't matter what the args are here.\n// _transform does all the work.\n// That we got here means that the readable side wants more data.\n\n\nTransform.prototype._read = function (n) {\n  var ts = this._transformState;\n\n  if (ts.writechunk !== null && !ts.transforming) {\n    ts.transforming = true;\n\n    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);\n  } else {\n    // mark that we need a transform, so that any data that comes in\n    // will get processed, now that we've asked for it.\n    ts.needTransform = true;\n  }\n};\n\nTransform.prototype._destroy = function (err, cb) {\n  Duplex.prototype._destroy.call(this, err, function (err2) {\n    cb(err2);\n  });\n};\n\nfunction done(stream, er, data) {\n  if (er) return stream.emit('error', er);\n  if (data != null) // single equals check for both `null` and `undefined`\n    stream.push(data); // TODO(BridgeAR): Write a test for these two error cases\n  // if there's nothing in the write buffer, then that means\n  // that nothing more will ever be provided\n\n  if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();\n  if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();\n  return stream.push(null);\n}","var aes = require('./aes')\nvar Buffer = require('safe-buffer').Buffer\nvar Transform = require('cipher-base')\nvar inherits = require('inherits')\n\nfunction StreamCipher (mode, key, iv, decrypt) {\n  Transform.call(this)\n\n  this._cipher = new aes.AES(key)\n  this._prev = Buffer.from(iv)\n  this._cache = Buffer.allocUnsafe(0)\n  this._secCache = Buffer.allocUnsafe(0)\n  this._decrypt = decrypt\n  this._mode = mode\n}\n\ninherits(StreamCipher, Transform)\n\nStreamCipher.prototype._update = function (chunk) {\n  return this._mode.encrypt(this, chunk, this._decrypt)\n}\n\nStreamCipher.prototype._final = function () {\n  this._cipher.scrub()\n}\n\nmodule.exports = StreamCipher\n","import getNodeName from \"../dom-utils/getNodeName.js\";\nimport { isHTMLElement } from \"../dom-utils/instanceOf.js\"; // This modifier takes the styles prepared by the `computeStyles` modifier\n// and applies them to the HTMLElements such as popper and arrow\n\nfunction applyStyles(_ref) {\n  var state = _ref.state;\n  Object.keys(state.elements).forEach(function (name) {\n    var style = state.styles[name] || {};\n    var attributes = state.attributes[name] || {};\n    var element = state.elements[name]; // arrow is optional + virtual elements\n\n    if (!isHTMLElement(element) || !getNodeName(element)) {\n      return;\n    } // Flow doesn't support to extend this property, but it's the most\n    // effective way to apply styles to an HTMLElement\n    // $FlowFixMe[cannot-write]\n\n\n    Object.assign(element.style, style);\n    Object.keys(attributes).forEach(function (name) {\n      var value = attributes[name];\n\n      if (value === false) {\n        element.removeAttribute(name);\n      } else {\n        element.setAttribute(name, value === true ? '' : value);\n      }\n    });\n  });\n}\n\nfunction effect(_ref2) {\n  var state = _ref2.state;\n  var initialStyles = {\n    popper: {\n      position: state.options.strategy,\n      left: '0',\n      top: '0',\n      margin: '0'\n    },\n    arrow: {\n      position: 'absolute'\n    },\n    reference: {}\n  };\n  Object.assign(state.elements.popper.style, initialStyles.popper);\n  state.styles = initialStyles;\n\n  if (state.elements.arrow) {\n    Object.assign(state.elements.arrow.style, initialStyles.arrow);\n  }\n\n  return function () {\n    Object.keys(state.elements).forEach(function (name) {\n      var element = state.elements[name];\n      var attributes = state.attributes[name] || {};\n      var styleProperties = Object.keys(state.styles.hasOwnProperty(name) ? state.styles[name] : initialStyles[name]); // Set all values to an empty string to unset them\n\n      var style = styleProperties.reduce(function (style, property) {\n        style[property] = '';\n        return style;\n      }, {}); // arrow is optional + virtual elements\n\n      if (!isHTMLElement(element) || !getNodeName(element)) {\n        return;\n      }\n\n      Object.assign(element.style, style);\n      Object.keys(attributes).forEach(function (attribute) {\n        element.removeAttribute(attribute);\n      });\n    });\n  };\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'applyStyles',\n  enabled: true,\n  phase: 'write',\n  fn: applyStyles,\n  effect: effect,\n  requires: ['computeStyles']\n};","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// a passthrough stream.\n// basically just the most minimal sort of Transform stream.\n// Every written chunk gets output as-is.\n'use strict';\n\nmodule.exports = PassThrough;\n\nvar Transform = require('./_stream_transform');\n\nrequire('inherits')(PassThrough, Transform);\n\nfunction PassThrough(options) {\n  if (!(this instanceof PassThrough)) return new PassThrough(options);\n  Transform.call(this, options);\n}\n\nPassThrough.prototype._transform = function (chunk, encoding, cb) {\n  cb(null, chunk);\n};","exports['des-ecb'] = {\n  key: 8,\n  iv: 0\n}\nexports['des-cbc'] = exports.des = {\n  key: 8,\n  iv: 8\n}\nexports['des-ede3-cbc'] = exports.des3 = {\n  key: 24,\n  iv: 8\n}\nexports['des-ede3'] = {\n  key: 24,\n  iv: 0\n}\nexports['des-ede-cbc'] = {\n  key: 16,\n  iv: 8\n}\nexports['des-ede'] = {\n  key: 16,\n  iv: 0\n}\n","/*\n * pkcs7.unpad\n * https://github.com/brightcove/pkcs7\n *\n * Copyright (c) 2014 Brightcove\n * Licensed under the apache2 license.\n */\n\n'use strict';\n\n/**\n * Returns the subarray of a Uint8Array without PKCS#7 padding.\n * @param padded {Uint8Array} unencrypted bytes that have been padded\n * @return {Uint8Array} the unpadded bytes\n * @see http://tools.ietf.org/html/rfc5652\n */\nmodule.exports = function unpad(padded) {\n  return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n};\n","var toObject = require('../internals/to-object');\n\nvar floor = Math.floor;\nvar replace = ''.replace;\nvar SUBSTITUTION_SYMBOLS = /\\$([$&'`]|\\d{1,2}|<[^>]*>)/g;\nvar SUBSTITUTION_SYMBOLS_NO_NAMED = /\\$([$&'`]|\\d{1,2})/g;\n\n// https://tc39.es/ecma262/#sec-getsubstitution\nmodule.exports = function (matched, str, position, captures, namedCaptures, replacement) {\n  var tailPos = position + matched.length;\n  var m = captures.length;\n  var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;\n  if (namedCaptures !== undefined) {\n    namedCaptures = toObject(namedCaptures);\n    symbols = SUBSTITUTION_SYMBOLS;\n  }\n  return replace.call(replacement, symbols, function (match, ch) {\n    var capture;\n    switch (ch.charAt(0)) {\n      case '$': return '$';\n      case '&': return matched;\n      case '`': return str.slice(0, position);\n      case \"'\": return str.slice(tailPos);\n      case '<':\n        capture = namedCaptures[ch.slice(1, -1)];\n        break;\n      default: // \\d\\d?\n        var n = +ch;\n        if (n === 0) return match;\n        if (n > m) {\n          var f = floor(n / 10);\n          if (f === 0) return match;\n          if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);\n          return match;\n        }\n        capture = captures[n - 1];\n    }\n    return capture === undefined ? '' : capture;\n  });\n};\n","'use strict';\n\nvar curves = exports;\n\nvar hash = require('hash.js');\nvar curve = require('./curve');\nvar utils = require('./utils');\n\nvar assert = utils.assert;\n\nfunction PresetCurve(options) {\n  if (options.type === 'short')\n    this.curve = new curve.short(options);\n  else if (options.type === 'edwards')\n    this.curve = new curve.edwards(options);\n  else\n    this.curve = new curve.mont(options);\n  this.g = this.curve.g;\n  this.n = this.curve.n;\n  this.hash = options.hash;\n\n  assert(this.g.validate(), 'Invalid curve');\n  assert(this.g.mul(this.n).isInfinity(), 'Invalid curve, G*N != O');\n}\ncurves.PresetCurve = PresetCurve;\n\nfunction defineCurve(name, options) {\n  Object.defineProperty(curves, name, {\n    configurable: true,\n    enumerable: true,\n    get: function() {\n      var curve = new PresetCurve(options);\n      Object.defineProperty(curves, name, {\n        configurable: true,\n        enumerable: true,\n        value: curve,\n      });\n      return curve;\n    },\n  });\n}\n\ndefineCurve('p192', {\n  type: 'short',\n  prime: 'p192',\n  p: 'ffffffff ffffffff ffffffff fffffffe ffffffff ffffffff',\n  a: 'ffffffff ffffffff ffffffff fffffffe ffffffff fffffffc',\n  b: '64210519 e59c80e7 0fa7e9ab 72243049 feb8deec c146b9b1',\n  n: 'ffffffff ffffffff ffffffff 99def836 146bc9b1 b4d22831',\n  hash: hash.sha256,\n  gRed: false,\n  g: [\n    '188da80e b03090f6 7cbf20eb 43a18800 f4ff0afd 82ff1012',\n    '07192b95 ffc8da78 631011ed 6b24cdd5 73f977a1 1e794811',\n  ],\n});\n\ndefineCurve('p224', {\n  type: 'short',\n  prime: 'p224',\n  p: 'ffffffff ffffffff ffffffff ffffffff 00000000 00000000 00000001',\n  a: 'ffffffff ffffffff ffffffff fffffffe ffffffff ffffffff fffffffe',\n  b: 'b4050a85 0c04b3ab f5413256 5044b0b7 d7bfd8ba 270b3943 2355ffb4',\n  n: 'ffffffff ffffffff ffffffff ffff16a2 e0b8f03e 13dd2945 5c5c2a3d',\n  hash: hash.sha256,\n  gRed: false,\n  g: [\n    'b70e0cbd 6bb4bf7f 321390b9 4a03c1d3 56c21122 343280d6 115c1d21',\n    'bd376388 b5f723fb 4c22dfe6 cd4375a0 5a074764 44d58199 85007e34',\n  ],\n});\n\ndefineCurve('p256', {\n  type: 'short',\n  prime: null,\n  p: 'ffffffff 00000001 00000000 00000000 00000000 ffffffff ffffffff ffffffff',\n  a: 'ffffffff 00000001 00000000 00000000 00000000 ffffffff ffffffff fffffffc',\n  b: '5ac635d8 aa3a93e7 b3ebbd55 769886bc 651d06b0 cc53b0f6 3bce3c3e 27d2604b',\n  n: 'ffffffff 00000000 ffffffff ffffffff bce6faad a7179e84 f3b9cac2 fc632551',\n  hash: hash.sha256,\n  gRed: false,\n  g: [\n    '6b17d1f2 e12c4247 f8bce6e5 63a440f2 77037d81 2deb33a0 f4a13945 d898c296',\n    '4fe342e2 fe1a7f9b 8ee7eb4a 7c0f9e16 2bce3357 6b315ece cbb64068 37bf51f5',\n  ],\n});\n\ndefineCurve('p384', {\n  type: 'short',\n  prime: null,\n  p: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'fffffffe ffffffff 00000000 00000000 ffffffff',\n  a: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'fffffffe ffffffff 00000000 00000000 fffffffc',\n  b: 'b3312fa7 e23ee7e4 988e056b e3f82d19 181d9c6e fe814112 0314088f ' +\n     '5013875a c656398d 8a2ed19d 2a85c8ed d3ec2aef',\n  n: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff c7634d81 ' +\n     'f4372ddf 581a0db2 48b0a77a ecec196a ccc52973',\n  hash: hash.sha384,\n  gRed: false,\n  g: [\n    'aa87ca22 be8b0537 8eb1c71e f320ad74 6e1d3b62 8ba79b98 59f741e0 82542a38 ' +\n    '5502f25d bf55296c 3a545e38 72760ab7',\n    '3617de4a 96262c6f 5d9e98bf 9292dc29 f8f41dbd 289a147c e9da3113 b5f0b8c0 ' +\n    '0a60b1ce 1d7e819d 7a431d7c 90ea0e5f',\n  ],\n});\n\ndefineCurve('p521', {\n  type: 'short',\n  prime: null,\n  p: '000001ff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'ffffffff ffffffff ffffffff ffffffff ffffffff',\n  a: '000001ff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'ffffffff ffffffff ffffffff ffffffff fffffffc',\n  b: '00000051 953eb961 8e1c9a1f 929a21a0 b68540ee a2da725b ' +\n     '99b315f3 b8b48991 8ef109e1 56193951 ec7e937b 1652c0bd ' +\n     '3bb1bf07 3573df88 3d2c34f1 ef451fd4 6b503f00',\n  n: '000001ff ffffffff ffffffff ffffffff ffffffff ffffffff ' +\n     'ffffffff ffffffff fffffffa 51868783 bf2f966b 7fcc0148 ' +\n     'f709a5d0 3bb5c9b8 899c47ae bb6fb71e 91386409',\n  hash: hash.sha512,\n  gRed: false,\n  g: [\n    '000000c6 858e06b7 0404e9cd 9e3ecb66 2395b442 9c648139 ' +\n    '053fb521 f828af60 6b4d3dba a14b5e77 efe75928 fe1dc127 ' +\n    'a2ffa8de 3348b3c1 856a429b f97e7e31 c2e5bd66',\n    '00000118 39296a78 9a3bc004 5c8a5fb4 2c7d1bd9 98f54449 ' +\n    '579b4468 17afbd17 273e662c 97ee7299 5ef42640 c550b901 ' +\n    '3fad0761 353c7086 a272c240 88be9476 9fd16650',\n  ],\n});\n\ndefineCurve('curve25519', {\n  type: 'mont',\n  prime: 'p25519',\n  p: '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed',\n  a: '76d06',\n  b: '1',\n  n: '1000000000000000 0000000000000000 14def9dea2f79cd6 5812631a5cf5d3ed',\n  hash: hash.sha256,\n  gRed: false,\n  g: [\n    '9',\n  ],\n});\n\ndefineCurve('ed25519', {\n  type: 'edwards',\n  prime: 'p25519',\n  p: '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed',\n  a: '-1',\n  c: '1',\n  // -121665 * (121666^(-1)) (mod P)\n  d: '52036cee2b6ffe73 8cc740797779e898 00700a4d4141d8ab 75eb4dca135978a3',\n  n: '1000000000000000 0000000000000000 14def9dea2f79cd6 5812631a5cf5d3ed',\n  hash: hash.sha256,\n  gRed: false,\n  g: [\n    '216936d3cd6e53fec0a4e231fdd6dc5c692cc7609525a7b2c9562d608f25d51a',\n\n    // 4/5\n    '6666666666666666666666666666666666666666666666666666666666666658',\n  ],\n});\n\nvar pre;\ntry {\n  pre = require('./precomputed/secp256k1');\n} catch (e) {\n  pre = undefined;\n}\n\ndefineCurve('secp256k1', {\n  type: 'short',\n  prime: 'k256',\n  p: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffffe fffffc2f',\n  a: '0',\n  b: '7',\n  n: 'ffffffff ffffffff 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this.find(e,t).filter((t=>!c(t)&&l(t)))}},K=\"carousel\",X={interval:5e3,keyboard:!0,slide:!1,pause:\"hover\",wrap:!0,touch:!0},Y={interval:\"(number|boolean)\",keyboard:\"boolean\",slide:\"(boolean|string)\",pause:\"(string|boolean)\",wrap:\"boolean\",touch:\"boolean\"},Q=\"next\",G=\"prev\",Z=\"left\",J=\"right\",tt={ArrowLeft:J,ArrowRight:Z},et=\"slid.bs.carousel\",it=\"active\",nt=\".active.carousel-item\";class st extends B{constructor(t,e){super(t),this._items=null,this._interval=null,this._activeElement=null,this._isPaused=!1,this._isSliding=!1,this.touchTimeout=null,this.touchStartX=0,this.touchDeltaX=0,this._config=this._getConfig(e),this._indicatorsElement=V.findOne(\".carousel-indicators\",this._element),this._touchSupported=\"ontouchstart\"in document.documentElement||navigator.maxTouchPoints>0,this._pointerEvent=Boolean(window.PointerEvent),this._addEventListeners()}static get Default(){return X}static get NAME(){return K}next(){this._slide(Q)}nextWhenVisible(){!document.hidden&&l(this._element)&&this.next()}prev(){this._slide(G)}pause(t){t||(this._isPaused=!0),V.findOne(\".carousel-item-next, .carousel-item-prev\",this._element)&&(s(this._element),this.cycle(!0)),clearInterval(this._interval),this._interval=null}cycle(t){t||(this._isPaused=!1),this._interval&&(clearInterval(this._interval),this._interval=null),this._config&&this._config.interval&&!this._isPaused&&(this._updateInterval(),this._interval=setInterval((document.visibilityState?this.nextWhenVisible:this.next).bind(this),this._config.interval))}to(t){this._activeElement=V.findOne(nt,this._element);const e=this._getItemIndex(this._activeElement);if(t>this._items.length-1||t<0)return;if(this._isSliding)return void j.one(this._element,et,(()=>this.to(t)));if(e===t)return this.pause(),void this.cycle();const i=t>e?Q:G;this._slide(i,this._items[t])}_getConfig(t){return t={...X,...U.getDataAttributes(this._element),...\"object\"==typeof t?t:{}},a(K,t,Y),t}_handleSwipe(){const t=Math.abs(this.touchDeltaX);if(t<=40)return;const e=t/this.touchDeltaX;this.touchDeltaX=0,e&&this._slide(e>0?J:Z)}_addEventListeners(){this._config.keyboard&&j.on(this._element,\"keydown.bs.carousel\",(t=>this._keydown(t))),\"hover\"===this._config.pause&&(j.on(this._element,\"mouseenter.bs.carousel\",(t=>this.pause(t))),j.on(this._element,\"mouseleave.bs.carousel\",(t=>this.cycle(t)))),this._config.touch&&this._touchSupported&&this._addTouchEventListeners()}_addTouchEventListeners(){const t=t=>this._pointerEvent&&(\"pen\"===t.pointerType||\"touch\"===t.pointerType),e=e=>{t(e)?this.touchStartX=e.clientX:this._pointerEvent||(this.touchStartX=e.touches[0].clientX)},i=t=>{this.touchDeltaX=t.touches&&t.touches.length>1?0:t.touches[0].clientX-this.touchStartX},n=e=>{t(e)&&(this.touchDeltaX=e.clientX-this.touchStartX),this._handleSwipe(),\"hover\"===this._config.pause&&(this.pause(),this.touchTimeout&&clearTimeout(this.touchTimeout),this.touchTimeout=setTimeout((t=>this.cycle(t)),500+this._config.interval))};V.find(\".carousel-item img\",this._element).forEach((t=>{j.on(t,\"dragstart.bs.carousel\",(t=>t.preventDefault()))})),this._pointerEvent?(j.on(this._element,\"pointerdown.bs.carousel\",(t=>e(t))),j.on(this._element,\"pointerup.bs.carousel\",(t=>n(t))),this._element.classList.add(\"pointer-event\")):(j.on(this._element,\"touchstart.bs.carousel\",(t=>e(t))),j.on(this._element,\"touchmove.bs.carousel\",(t=>i(t))),j.on(this._element,\"touchend.bs.carousel\",(t=>n(t))))}_keydown(t){if(/input|textarea/i.test(t.target.tagName))return;const e=tt[t.key];e&&(t.preventDefault(),this._slide(e))}_getItemIndex(t){return this._items=t&&t.parentNode?V.find(\".carousel-item\",t.parentNode):[],this._items.indexOf(t)}_getItemByOrder(t,e){const i=t===Q;return v(this._items,e,i,this._config.wrap)}_triggerSlideEvent(t,e){const i=this._getItemIndex(t),n=this._getItemIndex(V.findOne(nt,this._element));return j.trigger(this._element,\"slide.bs.carousel\",{relatedTarget:t,direction:e,from:n,to:i})}_setActiveIndicatorElement(t){if(this._indicatorsElement){const e=V.findOne(\".active\",this._indicatorsElement);e.classList.remove(it),e.removeAttribute(\"aria-current\");const i=V.find(\"[data-bs-target]\",this._indicatorsElement);for(let e=0;e<i.length;e++)if(Number.parseInt(i[e].getAttribute(\"data-bs-slide-to\"),10)===this._getItemIndex(t)){i[e].classList.add(it),i[e].setAttribute(\"aria-current\",\"true\");break}}}_updateInterval(){const t=this._activeElement||V.findOne(nt,this._element);if(!t)return;const e=Number.parseInt(t.getAttribute(\"data-bs-interval\"),10);e?(this._config.defaultInterval=this._config.defaultInterval||this._config.interval,this._config.interval=e):this._config.interval=this._config.defaultInterval||this._config.interval}_slide(t,e){const i=this._directionToOrder(t),n=V.findOne(nt,this._element),s=this._getItemIndex(n),o=e||this._getItemByOrder(i,n),r=this._getItemIndex(o),a=Boolean(this._interval),l=i===Q,c=l?\"carousel-item-start\":\"carousel-item-end\",h=l?\"carousel-item-next\":\"carousel-item-prev\",d=this._orderToDirection(i);if(o&&o.classList.contains(it))return void(this._isSliding=!1);if(this._isSliding)return;if(this._triggerSlideEvent(o,d).defaultPrevented)return;if(!n||!o)return;this._isSliding=!0,a&&this.pause(),this._setActiveIndicatorElement(o),this._activeElement=o;const f=()=>{j.trigger(this._element,et,{relatedTarget:o,direction:d,from:s,to:r})};if(this._element.classList.contains(\"slide\")){o.classList.add(h),u(o),n.classList.add(c),o.classList.add(c);const t=()=>{o.classList.remove(c,h),o.classList.add(it),n.classList.remove(it,h,c),this._isSliding=!1,setTimeout(f,0)};this._queueCallback(t,n,!0)}else n.classList.remove(it),o.classList.add(it),this._isSliding=!1,f();a&&this.cycle()}_directionToOrder(t){return[J,Z].includes(t)?m()?t===Z?G:Q:t===Z?Q:G:t}_orderToDirection(t){return[Q,G].includes(t)?m()?t===G?Z:J:t===G?J:Z:t}static carouselInterface(t,e){const i=st.getOrCreateInstance(t,e);let{_config:n}=i;\"object\"==typeof e&&(n={...n,...e});const s=\"string\"==typeof e?e:n.slide;if(\"number\"==typeof e)i.to(e);else if(\"string\"==typeof s){if(void 0===i[s])throw new TypeError(`No method named \"${s}\"`);i[s]()}else n.interval&&n.ride&&(i.pause(),i.cycle())}static jQueryInterface(t){return this.each((function(){st.carouselInterface(this,t)}))}static dataApiClickHandler(t){const e=n(this);if(!e||!e.classList.contains(\"carousel\"))return;const i={...U.getDataAttributes(e),...U.getDataAttributes(this)},s=this.getAttribute(\"data-bs-slide-to\");s&&(i.interval=!1),st.carouselInterface(e,i),s&&st.getInstance(e).to(s),t.preventDefault()}}j.on(document,\"click.bs.carousel.data-api\",\"[data-bs-slide], [data-bs-slide-to]\",st.dataApiClickHandler),j.on(window,\"load.bs.carousel.data-api\",(()=>{const t=V.find('[data-bs-ride=\"carousel\"]');for(let e=0,i=t.length;e<i;e++)st.carouselInterface(t[e],st.getInstance(t[e]))})),g(st);const ot=\"collapse\",rt={toggle:!0,parent:null},at={toggle:\"boolean\",parent:\"(null|element)\"},lt=\"show\",ct=\"collapse\",ht=\"collapsing\",dt=\"collapsed\",ut=\":scope .collapse .collapse\",ft='[data-bs-toggle=\"collapse\"]';class pt extends B{constructor(t,e){super(t),this._isTransitioning=!1,this._config=this._getConfig(e),this._triggerArray=[];const n=V.find(ft);for(let t=0,e=n.length;t<e;t++){const e=n[t],s=i(e),o=V.find(s).filter((t=>t===this._element));null!==s&&o.length&&(this._selector=s,this._triggerArray.push(e))}this._initializeChildren(),this._config.parent||this._addAriaAndCollapsedClass(this._triggerArray,this._isShown()),this._config.toggle&&this.toggle()}static get Default(){return rt}static get NAME(){return ot}toggle(){this._isShown()?this.hide():this.show()}show(){if(this._isTransitioning||this._isShown())return;let t,e=[];if(this._config.parent){const t=V.find(ut,this._config.parent);e=V.find(\".collapse.show, .collapse.collapsing\",this._config.parent).filter((e=>!t.includes(e)))}const i=V.findOne(this._selector);if(e.length){const n=e.find((t=>i!==t));if(t=n?pt.getInstance(n):null,t&&t._isTransitioning)return}if(j.trigger(this._element,\"show.bs.collapse\").defaultPrevented)return;e.forEach((e=>{i!==e&&pt.getOrCreateInstance(e,{toggle:!1}).hide(),t||H.set(e,\"bs.collapse\",null)}));const n=this._getDimension();this._element.classList.remove(ct),this._element.classList.add(ht),this._element.style[n]=0,this._addAriaAndCollapsedClass(this._triggerArray,!0),this._isTransitioning=!0;const s=`scroll${n[0].toUpperCase()+n.slice(1)}`;this._queueCallback((()=>{this._isTransitioning=!1,this._element.classList.remove(ht),this._element.classList.add(ct,lt),this._element.style[n]=\"\",j.trigger(this._element,\"shown.bs.collapse\")}),this._element,!0),this._element.style[n]=`${this._element[s]}px`}hide(){if(this._isTransitioning||!this._isShown())return;if(j.trigger(this._element,\"hide.bs.collapse\").defaultPrevented)return;const t=this._getDimension();this._element.style[t]=`${this._element.getBoundingClientRect()[t]}px`,u(this._element),this._element.classList.add(ht),this._element.classList.remove(ct,lt);const e=this._triggerArray.length;for(let t=0;t<e;t++){const e=this._triggerArray[t],i=n(e);i&&!this._isShown(i)&&this._addAriaAndCollapsedClass([e],!1)}this._isTransitioning=!0,this._element.style[t]=\"\",this._queueCallback((()=>{this._isTransitioning=!1,this._element.classList.remove(ht),this._element.classList.add(ct),j.trigger(this._element,\"hidden.bs.collapse\")}),this._element,!0)}_isShown(t=this._element){return t.classList.contains(lt)}_getConfig(t){return(t={...rt,...U.getDataAttributes(this._element),...t}).toggle=Boolean(t.toggle),t.parent=r(t.parent),a(ot,t,at),t}_getDimension(){return this._element.classList.contains(\"collapse-horizontal\")?\"width\":\"height\"}_initializeChildren(){if(!this._config.parent)return;const t=V.find(ut,this._config.parent);V.find(ft,this._config.parent).filter((e=>!t.includes(e))).forEach((t=>{const e=n(t);e&&this._addAriaAndCollapsedClass([t],this._isShown(e))}))}_addAriaAndCollapsedClass(t,e){t.length&&t.forEach((t=>{e?t.classList.remove(dt):t.classList.add(dt),t.setAttribute(\"aria-expanded\",e)}))}static jQueryInterface(t){return this.each((function(){const e={};\"string\"==typeof t&&/show|hide/.test(t)&&(e.toggle=!1);const i=pt.getOrCreateInstance(this,e);if(\"string\"==typeof t){if(void 0===i[t])throw new TypeError(`No method named \"${t}\"`);i[t]()}}))}}j.on(document,\"click.bs.collapse.data-api\",ft,(function(t){(\"A\"===t.target.tagName||t.delegateTarget&&\"A\"===t.delegateTarget.tagName)&&t.preventDefault();const e=i(this);V.find(e).forEach((t=>{pt.getOrCreateInstance(t,{toggle:!1}).toggle()}))})),g(pt);var mt=\"top\",gt=\"bottom\",_t=\"right\",bt=\"left\",vt=\"auto\",yt=[mt,gt,_t,bt],wt=\"start\",Et=\"end\",At=\"clippingParents\",Tt=\"viewport\",Ot=\"popper\",Ct=\"reference\",kt=yt.reduce((function(t,e){return t.concat([e+\"-\"+wt,e+\"-\"+Et])}),[]),Lt=[].concat(yt,[vt]).reduce((function(t,e){return t.concat([e,e+\"-\"+wt,e+\"-\"+Et])}),[]),xt=\"beforeRead\",Dt=\"read\",St=\"afterRead\",Nt=\"beforeMain\",It=\"main\",Pt=\"afterMain\",jt=\"beforeWrite\",Mt=\"write\",Ht=\"afterWrite\",Bt=[xt,Dt,St,Nt,It,Pt,jt,Mt,Ht];function Rt(t){return t?(t.nodeName||\"\").toLowerCase():null}function Wt(t){if(null==t)return window;if(\"[object Window]\"!==t.toString()){var e=t.ownerDocument;return e&&e.defaultView||window}return t}function $t(t){return t instanceof Wt(t).Element||t instanceof Element}function zt(t){return t instanceof Wt(t).HTMLElement||t instanceof HTMLElement}function qt(t){return\"undefined\"!=typeof ShadowRoot&&(t instanceof Wt(t).ShadowRoot||t instanceof ShadowRoot)}const Ft={name:\"applyStyles\",enabled:!0,phase:\"write\",fn:function(t){var e=t.state;Object.keys(e.elements).forEach((function(t){var i=e.styles[t]||{},n=e.attributes[t]||{},s=e.elements[t];zt(s)&&Rt(s)&&(Object.assign(s.style,i),Object.keys(n).forEach((function(t){var e=n[t];!1===e?s.removeAttribute(t):s.setAttribute(t,!0===e?\"\":e)})))}))},effect:function(t){var e=t.state,i={popper:{position:e.options.strategy,left:\"0\",top:\"0\",margin:\"0\"},arrow:{position:\"absolute\"},reference:{}};return Object.assign(e.elements.popper.style,i.popper),e.styles=i,e.elements.arrow&&Object.assign(e.elements.arrow.style,i.arrow),function(){Object.keys(e.elements).forEach((function(t){var n=e.elements[t],s=e.attributes[t]||{},o=Object.keys(e.styles.hasOwnProperty(t)?e.styles[t]:i[t]).reduce((function(t,e){return t[e]=\"\",t}),{});zt(n)&&Rt(n)&&(Object.assign(n.style,o),Object.keys(s).forEach((function(t){n.removeAttribute(t)})))}))}},requires:[\"computeStyles\"]};function Ut(t){return t.split(\"-\")[0]}function Vt(t,e){var i=t.getBoundingClientRect();return{width:i.width/1,height:i.height/1,top:i.top/1,right:i.right/1,bottom:i.bottom/1,left:i.left/1,x:i.left/1,y:i.top/1}}function Kt(t){var e=Vt(t),i=t.offsetWidth,n=t.offsetHeight;return Math.abs(e.width-i)<=1&&(i=e.width),Math.abs(e.height-n)<=1&&(n=e.height),{x:t.offsetLeft,y:t.offsetTop,width:i,height:n}}function Xt(t,e){var i=e.getRootNode&&e.getRootNode();if(t.contains(e))return!0;if(i&&qt(i)){var n=e;do{if(n&&t.isSameNode(n))return!0;n=n.parentNode||n.host}while(n)}return!1}function Yt(t){return Wt(t).getComputedStyle(t)}function Qt(t){return[\"table\",\"td\",\"th\"].indexOf(Rt(t))>=0}function Gt(t){return(($t(t)?t.ownerDocument:t.document)||window.document).documentElement}function Zt(t){return\"html\"===Rt(t)?t:t.assignedSlot||t.parentNode||(qt(t)?t.host:null)||Gt(t)}function Jt(t){return zt(t)&&\"fixed\"!==Yt(t).position?t.offsetParent:null}function te(t){for(var e=Wt(t),i=Jt(t);i&&Qt(i)&&\"static\"===Yt(i).position;)i=Jt(i);return i&&(\"html\"===Rt(i)||\"body\"===Rt(i)&&\"static\"===Yt(i).position)?e:i||function(t){var e=-1!==navigator.userAgent.toLowerCase().indexOf(\"firefox\");if(-1!==navigator.userAgent.indexOf(\"Trident\")&&zt(t)&&\"fixed\"===Yt(t).position)return null;for(var i=Zt(t);zt(i)&&[\"html\",\"body\"].indexOf(Rt(i))<0;){var n=Yt(i);if(\"none\"!==n.transform||\"none\"!==n.perspective||\"paint\"===n.contain||-1!==[\"transform\",\"perspective\"].indexOf(n.willChange)||e&&\"filter\"===n.willChange||e&&n.filter&&\"none\"!==n.filter)return i;i=i.parentNode}return null}(t)||e}function ee(t){return[\"top\",\"bottom\"].indexOf(t)>=0?\"x\":\"y\"}var ie=Math.max,ne=Math.min,se=Math.round;function oe(t,e,i){return ie(t,ne(e,i))}function re(t){return Object.assign({},{top:0,right:0,bottom:0,left:0},t)}function ae(t,e){return e.reduce((function(e,i){return e[i]=t,e}),{})}const le={name:\"arrow\",enabled:!0,phase:\"main\",fn:function(t){var e,i=t.state,n=t.name,s=t.options,o=i.elements.arrow,r=i.modifiersData.popperOffsets,a=Ut(i.placement),l=ee(a),c=[bt,_t].indexOf(a)>=0?\"height\":\"width\";if(o&&r){var h=function(t,e){return re(\"number\"!=typeof(t=\"function\"==typeof t?t(Object.assign({},e.rects,{placement:e.placement})):t)?t:ae(t,yt))}(s.padding,i),d=Kt(o),u=\"y\"===l?mt:bt,f=\"y\"===l?gt:_t,p=i.rects.reference[c]+i.rects.reference[l]-r[l]-i.rects.popper[c],m=r[l]-i.rects.reference[l],g=te(o),_=g?\"y\"===l?g.clientHeight||0:g.clientWidth||0:0,b=p/2-m/2,v=h[u],y=_-d[c]-h[f],w=_/2-d[c]/2+b,E=oe(v,w,y),A=l;i.modifiersData[n]=((e={})[A]=E,e.centerOffset=E-w,e)}},effect:function(t){var e=t.state,i=t.options.element,n=void 0===i?\"[data-popper-arrow]\":i;null!=n&&(\"string\"!=typeof n||(n=e.elements.popper.querySelector(n)))&&Xt(e.elements.popper,n)&&(e.elements.arrow=n)},requires:[\"popperOffsets\"],requiresIfExists:[\"preventOverflow\"]};function ce(t){return t.split(\"-\")[1]}var he={top:\"auto\",right:\"auto\",bottom:\"auto\",left:\"auto\"};function de(t){var e,i=t.popper,n=t.popperRect,s=t.placement,o=t.variation,r=t.offsets,a=t.position,l=t.gpuAcceleration,c=t.adaptive,h=t.roundOffsets,d=!0===h?function(t){var e=t.x,i=t.y,n=window.devicePixelRatio||1;return{x:se(se(e*n)/n)||0,y:se(se(i*n)/n)||0}}(r):\"function\"==typeof h?h(r):r,u=d.x,f=void 0===u?0:u,p=d.y,m=void 0===p?0:p,g=r.hasOwnProperty(\"x\"),_=r.hasOwnProperty(\"y\"),b=bt,v=mt,y=window;if(c){var w=te(i),E=\"clientHeight\",A=\"clientWidth\";w===Wt(i)&&\"static\"!==Yt(w=Gt(i)).position&&\"absolute\"===a&&(E=\"scrollHeight\",A=\"scrollWidth\"),w=w,s!==mt&&(s!==bt&&s!==_t||o!==Et)||(v=gt,m-=w[E]-n.height,m*=l?1:-1),s!==bt&&(s!==mt&&s!==gt||o!==Et)||(b=_t,f-=w[A]-n.width,f*=l?1:-1)}var T,O=Object.assign({position:a},c&&he);return l?Object.assign({},O,((T={})[v]=_?\"0\":\"\",T[b]=g?\"0\":\"\",T.transform=(y.devicePixelRatio||1)<=1?\"translate(\"+f+\"px, \"+m+\"px)\":\"translate3d(\"+f+\"px, \"+m+\"px, 0)\",T)):Object.assign({},O,((e={})[v]=_?m+\"px\":\"\",e[b]=g?f+\"px\":\"\",e.transform=\"\",e))}const ue={name:\"computeStyles\",enabled:!0,phase:\"beforeWrite\",fn:function(t){var e=t.state,i=t.options,n=i.gpuAcceleration,s=void 0===n||n,o=i.adaptive,r=void 0===o||o,a=i.roundOffsets,l=void 0===a||a,c={placement:Ut(e.placement),variation:ce(e.placement),popper:e.elements.popper,popperRect:e.rects.popper,gpuAcceleration:s};null!=e.modifiersData.popperOffsets&&(e.styles.popper=Object.assign({},e.styles.popper,de(Object.assign({},c,{offsets:e.modifiersData.popperOffsets,position:e.options.strategy,adaptive:r,roundOffsets:l})))),null!=e.modifiersData.arrow&&(e.styles.arrow=Object.assign({},e.styles.arrow,de(Object.assign({},c,{offsets:e.modifiersData.arrow,position:\"absolute\",adaptive:!1,roundOffsets:l})))),e.attributes.popper=Object.assign({},e.attributes.popper,{\"data-popper-placement\":e.placement})},data:{}};var fe={passive:!0};const pe={name:\"eventListeners\",enabled:!0,phase:\"write\",fn:function(){},effect:function(t){var e=t.state,i=t.instance,n=t.options,s=n.scroll,o=void 0===s||s,r=n.resize,a=void 0===r||r,l=Wt(e.elements.popper),c=[].concat(e.scrollParents.reference,e.scrollParents.popper);return o&&c.forEach((function(t){t.addEventListener(\"scroll\",i.update,fe)})),a&&l.addEventListener(\"resize\",i.update,fe),function(){o&&c.forEach((function(t){t.removeEventListener(\"scroll\",i.update,fe)})),a&&l.removeEventListener(\"resize\",i.update,fe)}},data:{}};var me={left:\"right\",right:\"left\",bottom:\"top\",top:\"bottom\"};function ge(t){return t.replace(/left|right|bottom|top/g,(function(t){return me[t]}))}var _e={start:\"end\",end:\"start\"};function be(t){return t.replace(/start|end/g,(function(t){return _e[t]}))}function ve(t){var e=Wt(t);return{scrollLeft:e.pageXOffset,scrollTop:e.pageYOffset}}function ye(t){return Vt(Gt(t)).left+ve(t).scrollLeft}function we(t){var e=Yt(t),i=e.overflow,n=e.overflowX,s=e.overflowY;return/auto|scroll|overlay|hidden/.test(i+s+n)}function Ee(t){return[\"html\",\"body\",\"#document\"].indexOf(Rt(t))>=0?t.ownerDocument.body:zt(t)&&we(t)?t:Ee(Zt(t))}function Ae(t,e){var i;void 0===e&&(e=[]);var n=Ee(t),s=n===(null==(i=t.ownerDocument)?void 0:i.body),o=Wt(n),r=s?[o].concat(o.visualViewport||[],we(n)?n:[]):n,a=e.concat(r);return s?a:a.concat(Ae(Zt(r)))}function Te(t){return Object.assign({},t,{left:t.x,top:t.y,right:t.x+t.width,bottom:t.y+t.height})}function Oe(t,e){return e===Tt?Te(function(t){var e=Wt(t),i=Gt(t),n=e.visualViewport,s=i.clientWidth,o=i.clientHeight,r=0,a=0;return n&&(s=n.width,o=n.height,/^((?!chrome|android).)*safari/i.test(navigator.userAgent)||(r=n.offsetLeft,a=n.offsetTop)),{width:s,height:o,x:r+ye(t),y:a}}(t)):zt(e)?function(t){var e=Vt(t);return e.top=e.top+t.clientTop,e.left=e.left+t.clientLeft,e.bottom=e.top+t.clientHeight,e.right=e.left+t.clientWidth,e.width=t.clientWidth,e.height=t.clientHeight,e.x=e.left,e.y=e.top,e}(e):Te(function(t){var e,i=Gt(t),n=ve(t),s=null==(e=t.ownerDocument)?void 0:e.body,o=ie(i.scrollWidth,i.clientWidth,s?s.scrollWidth:0,s?s.clientWidth:0),r=ie(i.scrollHeight,i.clientHeight,s?s.scrollHeight:0,s?s.clientHeight:0),a=-n.scrollLeft+ye(t),l=-n.scrollTop;return\"rtl\"===Yt(s||i).direction&&(a+=ie(i.clientWidth,s?s.clientWidth:0)-o),{width:o,height:r,x:a,y:l}}(Gt(t)))}function Ce(t){var e,i=t.reference,n=t.element,s=t.placement,o=s?Ut(s):null,r=s?ce(s):null,a=i.x+i.width/2-n.width/2,l=i.y+i.height/2-n.height/2;switch(o){case mt:e={x:a,y:i.y-n.height};break;case gt:e={x:a,y:i.y+i.height};break;case _t:e={x:i.x+i.width,y:l};break;case bt:e={x:i.x-n.width,y:l};break;default:e={x:i.x,y:i.y}}var c=o?ee(o):null;if(null!=c){var h=\"y\"===c?\"height\":\"width\";switch(r){case 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r.width=r.right-r.left,r.height=r.bottom-r.top,r.x=r.left,r.y=r.top,r}($t(b)?b:b.contextElement||Gt(t.elements.popper),r,l),y=Vt(t.elements.reference),w=Ce({reference:y,element:_,strategy:\"absolute\",placement:s}),E=Te(Object.assign({},_,w)),A=h===Ot?E:y,T={top:v.top-A.top+m.top,bottom:A.bottom-v.bottom+m.bottom,left:v.left-A.left+m.left,right:A.right-v.right+m.right},O=t.modifiersData.offset;if(h===Ot&&O){var C=O[s];Object.keys(T).forEach((function(t){var e=[_t,gt].indexOf(t)>=0?1:-1,i=[mt,gt].indexOf(t)>=0?\"y\":\"x\";T[t]+=C[i]*e}))}return T}function Le(t,e){void 0===e&&(e={});var i=e,n=i.placement,s=i.boundary,o=i.rootBoundary,r=i.padding,a=i.flipVariations,l=i.allowedAutoPlacements,c=void 0===l?Lt:l,h=ce(n),d=h?a?kt:kt.filter((function(t){return ce(t)===h})):yt,u=d.filter((function(t){return c.indexOf(t)>=0}));0===u.length&&(u=d);var f=u.reduce((function(e,i){return e[i]=ke(t,{placement:i,boundary:s,rootBoundary:o,padding:r})[Ut(i)],e}),{});return Object.keys(f).sort((function(t,e){return f[t]-f[e]}))}const xe={name:\"flip\",enabled:!0,phase:\"main\",fn:function(t){var e=t.state,i=t.options,n=t.name;if(!e.modifiersData[n]._skip){for(var s=i.mainAxis,o=void 0===s||s,r=i.altAxis,a=void 0===r||r,l=i.fallbackPlacements,c=i.padding,h=i.boundary,d=i.rootBoundary,u=i.altBoundary,f=i.flipVariations,p=void 0===f||f,m=i.allowedAutoPlacements,g=e.options.placement,_=Ut(g),b=l||(_!==g&&p?function(t){if(Ut(t)===vt)return[];var e=ge(t);return[be(t),e,be(e)]}(g):[ge(g)]),v=[g].concat(b).reduce((function(t,i){return t.concat(Ut(i)===vt?Le(e,{placement:i,boundary:h,rootBoundary:d,padding:c,flipVariations:p,allowedAutoPlacements:m}):i)}),[]),y=e.rects.reference,w=e.rects.popper,E=new Map,A=!0,T=v[0],O=0;O<v.length;O++){var C=v[O],k=Ut(C),L=ce(C)===wt,x=[mt,gt].indexOf(k)>=0,D=x?\"width\":\"height\",S=ke(e,{placement:C,boundary:h,rootBoundary:d,altBoundary:u,padding:c}),N=x?L?_t:bt:L?gt:mt;y[D]>w[D]&&(N=ge(N));var I=ge(N),P=[];if(o&&P.push(S[k]<=0),a&&P.push(S[N]<=0,S[I]<=0),P.every((function(t){return t}))){T=C,A=!1;break}E.set(C,P)}if(A)for(var j=function(t){var e=v.find((function(e){var i=E.get(e);if(i)return i.slice(0,t).every((function(t){return t}))}));if(e)return T=e,\"break\"},M=p?3:1;M>0&&\"break\"!==j(M);M--);e.placement!==T&&(e.modifiersData[n]._skip=!0,e.placement=T,e.reset=!0)}},requiresIfExists:[\"offset\"],data:{_skip:!1}};function De(t,e,i){return void 0===i&&(i={x:0,y:0}),{top:t.top-e.height-i.y,right:t.right-e.width+i.x,bottom:t.bottom-e.height+i.y,left:t.left-e.width-i.x}}function Se(t){return[mt,_t,gt,bt].some((function(e){return t[e]>=0}))}const Ne={name:\"hide\",enabled:!0,phase:\"main\",requiresIfExists:[\"preventOverflow\"],fn:function(t){var e=t.state,i=t.name,n=e.rects.reference,s=e.rects.popper,o=e.modifiersData.preventOverflow,r=ke(e,{elementContext:\"reference\"}),a=ke(e,{altBoundary:!0}),l=De(r,n),c=De(a,s,o),h=Se(l),d=Se(c);e.modifiersData[i]={referenceClippingOffsets:l,popperEscapeOffsets:c,isReferenceHidden:h,hasPopperEscaped:d},e.attributes.popper=Object.assign({},e.attributes.popper,{\"data-popper-reference-hidden\":h,\"data-popper-escaped\":d})}},Ie={name:\"offset\",enabled:!0,phase:\"main\",requires:[\"popperOffsets\"],fn:function(t){var e=t.state,i=t.options,n=t.name,s=i.offset,o=void 0===s?[0,0]:s,r=Lt.reduce((function(t,i){return t[i]=function(t,e,i){var n=Ut(t),s=[bt,mt].indexOf(n)>=0?-1:1,o=\"function\"==typeof i?i(Object.assign({},e,{placement:t})):i,r=o[0],a=o[1];return r=r||0,a=(a||0)*s,[bt,_t].indexOf(n)>=0?{x:a,y:r}:{x:r,y:a}}(i,e.rects,o),t}),{}),a=r[e.placement],l=a.x,c=a.y;null!=e.modifiersData.popperOffsets&&(e.modifiersData.popperOffsets.x+=l,e.modifiersData.popperOffsets.y+=c),e.modifiersData[n]=r}},Pe={name:\"popperOffsets\",enabled:!0,phase:\"read\",fn:function(t){var e=t.state,i=t.name;e.modifiersData[i]=Ce({reference:e.rects.reference,element:e.rects.popper,strategy:\"absolute\",placement:e.placement})},data:{}},je={name:\"preventOverflow\",enabled:!0,phase:\"main\",fn:function(t){var e=t.state,i=t.options,n=t.name,s=i.mainAxis,o=void 0===s||s,r=i.altAxis,a=void 0!==r&&r,l=i.boundary,c=i.rootBoundary,h=i.altBoundary,d=i.padding,u=i.tether,f=void 0===u||u,p=i.tetherOffset,m=void 0===p?0:p,g=ke(e,{boundary:l,rootBoundary:c,padding:d,altBoundary:h}),_=Ut(e.placement),b=ce(e.placement),v=!b,y=ee(_),w=\"x\"===y?\"y\":\"x\",E=e.modifiersData.popperOffsets,A=e.rects.reference,T=e.rects.popper,O=\"function\"==typeof 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e=t.getBoundingClientRect();e.width,t.offsetWidth,e.height,t.offsetHeight}(e);var s,o,r=Gt(e),a=Vt(t),l={scrollLeft:0,scrollTop:0},c={x:0,y:0};return(n||!n&&!i)&&((\"body\"!==Rt(e)||we(r))&&(l=(s=e)!==Wt(s)&&zt(s)?{scrollLeft:(o=s).scrollLeft,scrollTop:o.scrollTop}:ve(s)),zt(e)?((c=Vt(e)).x+=e.clientLeft,c.y+=e.clientTop):r&&(c.x=ye(r))),{x:a.left+l.scrollLeft-c.x,y:a.top+l.scrollTop-c.y,width:a.width,height:a.height}}function He(t){var e=new Map,i=new Set,n=[];function s(t){i.add(t.name),[].concat(t.requires||[],t.requiresIfExists||[]).forEach((function(t){if(!i.has(t)){var n=e.get(t);n&&s(n)}})),n.push(t)}return t.forEach((function(t){e.set(t.name,t)})),t.forEach((function(t){i.has(t.name)||s(t)})),n}var Be={placement:\"bottom\",modifiers:[],strategy:\"absolute\"};function Re(){for(var t=arguments.length,e=new Array(t),i=0;i<t;i++)e[i]=arguments[i];return!e.some((function(t){return!(t&&\"function\"==typeof t.getBoundingClientRect)}))}function We(t){void 0===t&&(t={});var e=t,i=e.defaultModifiers,n=void 0===i?[]:i,s=e.defaultOptions,o=void 0===s?Be:s;return function(t,e,i){void 0===i&&(i=o);var s,r,a={placement:\"bottom\",orderedModifiers:[],options:Object.assign({},Be,o),modifiersData:{},elements:{reference:t,popper:e},attributes:{},styles:{}},l=[],c=!1,h={state:a,setOptions:function(i){var s=\"function\"==typeof i?i(a.options):i;d(),a.options=Object.assign({},o,a.options,s),a.scrollParents={reference:$t(t)?Ae(t):t.contextElement?Ae(t.contextElement):[],popper:Ae(e)};var r,c,u=function(t){var e=He(t);return Bt.reduce((function(t,i){return t.concat(e.filter((function(t){return t.phase===i})))}),[])}((r=[].concat(n,a.options.modifiers),c=r.reduce((function(t,e){var i=t[e.name];return t[e.name]=i?Object.assign({},i,e,{options:Object.assign({},i.options,e.options),data:Object.assign({},i.data,e.data)}):e,t}),{}),Object.keys(c).map((function(t){return c[t]}))));return a.orderedModifiers=u.filter((function(t){return t.enabled})),a.orderedModifiers.forEach((function(t){var e=t.name,i=t.options,n=void 0===i?{}:i,s=t.effect;if(\"function\"==typeof s){var o=s({state:a,name:e,instance:h,options:n});l.push(o||function(){})}})),h.update()},forceUpdate:function(){if(!c){var t=a.elements,e=t.reference,i=t.popper;if(Re(e,i)){a.rects={reference:Me(e,te(i),\"fixed\"===a.options.strategy),popper:Kt(i)},a.reset=!1,a.placement=a.options.placement,a.orderedModifiers.forEach((function(t){return a.modifiersData[t.name]=Object.assign({},t.data)}));for(var n=0;n<a.orderedModifiers.length;n++)if(!0!==a.reset){var s=a.orderedModifiers[n],o=s.fn,r=s.options,l=void 0===r?{}:r,d=s.name;\"function\"==typeof o&&(a=o({state:a,options:l,name:d,instance:h})||a)}else a.reset=!1,n=-1}}},update:(s=function(){return new Promise((function(t){h.forceUpdate(),t(a)}))},function(){return r||(r=new Promise((function(t){Promise.resolve().then((function(){r=void 0,t(s())}))}))),r}),destroy:function(){d(),c=!0}};if(!Re(t,e))return h;function d(){l.forEach((function(t){return t()})),l=[]}return h.setOptions(i).then((function(t){!c&&i.onFirstUpdate&&i.onFirstUpdate(t)})),h}}var $e=We(),ze=We({defaultModifiers:[pe,Pe,ue,Ft]}),qe=We({defaultModifiers:[pe,Pe,ue,Ft,Ie,xe,je,le,Ne]});const Fe=Object.freeze({__proto__:null,popperGenerator:We,detectOverflow:ke,createPopperBase:$e,createPopper:qe,createPopperLite:ze,top:mt,bottom:gt,right:_t,left:bt,auto:vt,basePlacements:yt,start:wt,end:Et,clippingParents:At,viewport:Tt,popper:Ot,reference:Ct,variationPlacements:kt,placements:Lt,beforeRead:xt,read:Dt,afterRead:St,beforeMain:Nt,main:It,afterMain:Pt,beforeWrite:jt,write:Mt,afterWrite:Ht,modifierPhases:Bt,applyStyles:Ft,arrow:le,computeStyles:ue,eventListeners:pe,flip:xe,hide:Ne,offset:Ie,popperOffsets:Pe,preventOverflow:je}),Ue=\"dropdown\",Ve=\"Escape\",Ke=\"Space\",Xe=\"ArrowUp\",Ye=\"ArrowDown\",Qe=new RegExp(\"ArrowUp|ArrowDown|Escape\"),Ge=\"click.bs.dropdown.data-api\",Ze=\"keydown.bs.dropdown.data-api\",Je=\"show\",ti='[data-bs-toggle=\"dropdown\"]',ei=\".dropdown-menu\",ii=m()?\"top-end\":\"top-start\",ni=m()?\"top-start\":\"top-end\",si=m()?\"bottom-end\":\"bottom-start\",oi=m()?\"bottom-start\":\"bottom-end\",ri=m()?\"left-start\":\"right-start\",ai=m()?\"right-start\":\"left-start\",li={offset:[0,2],boundary:\"clippingParents\",reference:\"toggle\",display:\"dynamic\",popperConfig:null,autoClose:!0},ci={offset:\"(array|string|function)\",boundary:\"(string|element)\",reference:\"(string|element|object)\",display:\"string\",popperConfig:\"(null|object|function)\",autoClose:\"(boolean|string)\"};class hi extends B{constructor(t,e){super(t),this._popper=null,this._config=this._getConfig(e),this._menu=this._getMenuElement(),this._inNavbar=this._detectNavbar()}static get Default(){return li}static get DefaultType(){return ci}static get NAME(){return Ue}toggle(){return this._isShown()?this.hide():this.show()}show(){if(c(this._element)||this._isShown(this._menu))return;const t={relatedTarget:this._element};if(j.trigger(this._element,\"show.bs.dropdown\",t).defaultPrevented)return;const e=hi.getParentFromElement(this._element);this._inNavbar?U.setDataAttribute(this._menu,\"popper\",\"none\"):this._createPopper(e),\"ontouchstart\"in document.documentElement&&!e.closest(\".navbar-nav\")&&[].concat(...document.body.children).forEach((t=>j.on(t,\"mouseover\",d))),this._element.focus(),this._element.setAttribute(\"aria-expanded\",!0),this._menu.classList.add(Je),this._element.classList.add(Je),j.trigger(this._element,\"shown.bs.dropdown\",t)}hide(){if(c(this._element)||!this._isShown(this._menu))return;const t={relatedTarget:this._element};this._completeHide(t)}dispose(){this._popper&&this._popper.destroy(),super.dispose()}update(){this._inNavbar=this._detectNavbar(),this._popper&&this._popper.update()}_completeHide(t){j.trigger(this._element,\"hide.bs.dropdown\",t).defaultPrevented||(\"ontouchstart\"in document.documentElement&&[].concat(...document.body.children).forEach((t=>j.off(t,\"mouseover\",d))),this._popper&&this._popper.destroy(),this._menu.classList.remove(Je),this._element.classList.remove(Je),this._element.setAttribute(\"aria-expanded\",\"false\"),U.removeDataAttribute(this._menu,\"popper\"),j.trigger(this._element,\"hidden.bs.dropdown\",t))}_getConfig(t){if(t={...this.constructor.Default,...U.getDataAttributes(this._element),...t},a(Ue,t,this.constructor.DefaultType),\"object\"==typeof t.reference&&!o(t.reference)&&\"function\"!=typeof t.reference.getBoundingClientRect)throw new TypeError(`${Ue.toUpperCase()}: Option \"reference\" provided type \"object\" without a required \"getBoundingClientRect\" method.`);return t}_createPopper(t){if(void 0===Fe)throw new TypeError(\"Bootstrap's dropdowns require Popper (https://popper.js.org)\");let e=this._element;\"parent\"===this._config.reference?e=t:o(this._config.reference)?e=r(this._config.reference):\"object\"==typeof this._config.reference&&(e=this._config.reference);const i=this._getPopperConfig(),n=i.modifiers.find((t=>\"applyStyles\"===t.name&&!1===t.enabled));this._popper=qe(e,this._menu,i),n&&U.setDataAttribute(this._menu,\"popper\",\"static\")}_isShown(t=this._element){return t.classList.contains(Je)}_getMenuElement(){return V.next(this._element,ei)[0]}_getPlacement(){const t=this._element.parentNode;if(t.classList.contains(\"dropend\"))return ri;if(t.classList.contains(\"dropstart\"))return ai;const e=\"end\"===getComputedStyle(this._menu).getPropertyValue(\"--bs-position\").trim();return t.classList.contains(\"dropup\")?e?ni:ii:e?oi:si}_detectNavbar(){return null!==this._element.closest(\".navbar\")}_getOffset(){const{offset:t}=this._config;return\"string\"==typeof t?t.split(\",\").map((t=>Number.parseInt(t,10))):\"function\"==typeof t?e=>t(e,this._element):t}_getPopperConfig(){const t={placement:this._getPlacement(),modifiers:[{name:\"preventOverflow\",options:{boundary:this._config.boundary}},{name:\"offset\",options:{offset:this._getOffset()}}]};return\"static\"===this._config.display&&(t.modifiers=[{name:\"applyStyles\",enabled:!1}]),{...t,...\"function\"==typeof this._config.popperConfig?this._config.popperConfig(t):this._config.popperConfig}}_selectMenuItem({key:t,target:e}){const i=V.find(\".dropdown-menu .dropdown-item:not(.disabled):not(:disabled)\",this._menu).filter(l);i.length&&v(i,e,t===Ye,!i.includes(e)).focus()}static jQueryInterface(t){return this.each((function(){const e=hi.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===e[t])throw new TypeError(`No method named \"${t}\"`);e[t]()}}))}static clearMenus(t){if(t&&(2===t.button||\"keyup\"===t.type&&\"Tab\"!==t.key))return;const e=V.find(ti);for(let i=0,n=e.length;i<n;i++){const n=hi.getInstance(e[i]);if(!n||!1===n._config.autoClose)continue;if(!n._isShown())continue;const s={relatedTarget:n._element};if(t){const e=t.composedPath(),i=e.includes(n._menu);if(e.includes(n._element)||\"inside\"===n._config.autoClose&&!i||\"outside\"===n._config.autoClose&&i)continue;if(n._menu.contains(t.target)&&(\"keyup\"===t.type&&\"Tab\"===t.key||/input|select|option|textarea|form/i.test(t.target.tagName)))continue;\"click\"===t.type&&(s.clickEvent=t)}n._completeHide(s)}}static getParentFromElement(t){return n(t)||t.parentNode}static dataApiKeydownHandler(t){if(/input|textarea/i.test(t.target.tagName)?t.key===Ke||t.key!==Ve&&(t.key!==Ye&&t.key!==Xe||t.target.closest(ei)):!Qe.test(t.key))return;const e=this.classList.contains(Je);if(!e&&t.key===Ve)return;if(t.preventDefault(),t.stopPropagation(),c(this))return;const i=this.matches(ti)?this:V.prev(this,ti)[0],n=hi.getOrCreateInstance(i);if(t.key!==Ve)return t.key===Xe||t.key===Ye?(e||n.show(),void n._selectMenuItem(t)):void(e&&t.key!==Ke||hi.clearMenus());n.hide()}}j.on(document,Ze,ti,hi.dataApiKeydownHandler),j.on(document,Ze,ei,hi.dataApiKeydownHandler),j.on(document,Ge,hi.clearMenus),j.on(document,\"keyup.bs.dropdown.data-api\",hi.clearMenus),j.on(document,Ge,ti,(function(t){t.preventDefault(),hi.getOrCreateInstance(this).toggle()})),g(hi);const di=\".fixed-top, .fixed-bottom, .is-fixed, .sticky-top\",ui=\".sticky-top\";class fi{constructor(){this._element=document.body}getWidth(){const t=document.documentElement.clientWidth;return Math.abs(window.innerWidth-t)}hide(){const t=this.getWidth();this._disableOverFlow(),this._setElementAttributes(this._element,\"paddingRight\",(e=>e+t)),this._setElementAttributes(di,\"paddingRight\",(e=>e+t)),this._setElementAttributes(ui,\"marginRight\",(e=>e-t))}_disableOverFlow(){this._saveInitialAttribute(this._element,\"overflow\"),this._element.style.overflow=\"hidden\"}_setElementAttributes(t,e,i){const n=this.getWidth();this._applyManipulationCallback(t,(t=>{if(t!==this._element&&window.innerWidth>t.clientWidth+n)return;this._saveInitialAttribute(t,e);const s=window.getComputedStyle(t)[e];t.style[e]=`${i(Number.parseFloat(s))}px`}))}reset(){this._resetElementAttributes(this._element,\"overflow\"),this._resetElementAttributes(this._element,\"paddingRight\"),this._resetElementAttributes(di,\"paddingRight\"),this._resetElementAttributes(ui,\"marginRight\")}_saveInitialAttribute(t,e){const i=t.style[e];i&&U.setDataAttribute(t,e,i)}_resetElementAttributes(t,e){this._applyManipulationCallback(t,(t=>{const i=U.getDataAttribute(t,e);void 0===i?t.style.removeProperty(e):(U.removeDataAttribute(t,e),t.style[e]=i)}))}_applyManipulationCallback(t,e){o(t)?e(t):V.find(t,this._element).forEach(e)}isOverflowing(){return this.getWidth()>0}}const pi={className:\"modal-backdrop\",isVisible:!0,isAnimated:!1,rootElement:\"body\",clickCallback:null},mi={className:\"string\",isVisible:\"boolean\",isAnimated:\"boolean\",rootElement:\"(element|string)\",clickCallback:\"(function|null)\"},gi=\"show\",_i=\"mousedown.bs.backdrop\";class bi{constructor(t){this._config=this._getConfig(t),this._isAppended=!1,this._element=null}show(t){this._config.isVisible?(this._append(),this._config.isAnimated&&u(this._getElement()),this._getElement().classList.add(gi),this._emulateAnimation((()=>{_(t)}))):_(t)}hide(t){this._config.isVisible?(this._getElement().classList.remove(gi),this._emulateAnimation((()=>{this.dispose(),_(t)}))):_(t)}_getElement(){if(!this._element){const t=document.createElement(\"div\");t.className=this._config.className,this._config.isAnimated&&t.classList.add(\"fade\"),this._element=t}return this._element}_getConfig(t){return(t={...pi,...\"object\"==typeof t?t:{}}).rootElement=r(t.rootElement),a(\"backdrop\",t,mi),t}_append(){this._isAppended||(this._config.rootElement.append(this._getElement()),j.on(this._getElement(),_i,(()=>{_(this._config.clickCallback)})),this._isAppended=!0)}dispose(){this._isAppended&&(j.off(this._element,_i),this._element.remove(),this._isAppended=!1)}_emulateAnimation(t){b(t,this._getElement(),this._config.isAnimated)}}const vi={trapElement:null,autofocus:!0},yi={trapElement:\"element\",autofocus:\"boolean\"},wi=\".bs.focustrap\",Ei=\"backward\";class Ai{constructor(t){this._config=this._getConfig(t),this._isActive=!1,this._lastTabNavDirection=null}activate(){const{trapElement:t,autofocus:e}=this._config;this._isActive||(e&&t.focus(),j.off(document,wi),j.on(document,\"focusin.bs.focustrap\",(t=>this._handleFocusin(t))),j.on(document,\"keydown.tab.bs.focustrap\",(t=>this._handleKeydown(t))),this._isActive=!0)}deactivate(){this._isActive&&(this._isActive=!1,j.off(document,wi))}_handleFocusin(t){const{target:e}=t,{trapElement:i}=this._config;if(e===document||e===i||i.contains(e))return;const n=V.focusableChildren(i);0===n.length?i.focus():this._lastTabNavDirection===Ei?n[n.length-1].focus():n[0].focus()}_handleKeydown(t){\"Tab\"===t.key&&(this._lastTabNavDirection=t.shiftKey?Ei:\"forward\")}_getConfig(t){return t={...vi,...\"object\"==typeof t?t:{}},a(\"focustrap\",t,yi),t}}const Ti=\"modal\",Oi=\"Escape\",Ci={backdrop:!0,keyboard:!0,focus:!0},ki={backdrop:\"(boolean|string)\",keyboard:\"boolean\",focus:\"boolean\"},Li=\"hidden.bs.modal\",xi=\"show.bs.modal\",Di=\"resize.bs.modal\",Si=\"click.dismiss.bs.modal\",Ni=\"keydown.dismiss.bs.modal\",Ii=\"mousedown.dismiss.bs.modal\",Pi=\"modal-open\",ji=\"show\",Mi=\"modal-static\";class Hi extends B{constructor(t,e){super(t),this._config=this._getConfig(e),this._dialog=V.findOne(\".modal-dialog\",this._element),this._backdrop=this._initializeBackDrop(),this._focustrap=this._initializeFocusTrap(),this._isShown=!1,this._ignoreBackdropClick=!1,this._isTransitioning=!1,this._scrollBar=new fi}static get Default(){return Ci}static get NAME(){return Ti}toggle(t){return this._isShown?this.hide():this.show(t)}show(t){this._isShown||this._isTransitioning||j.trigger(this._element,xi,{relatedTarget:t}).defaultPrevented||(this._isShown=!0,this._isAnimated()&&(this._isTransitioning=!0),this._scrollBar.hide(),document.body.classList.add(Pi),this._adjustDialog(),this._setEscapeEvent(),this._setResizeEvent(),j.on(this._dialog,Ii,(()=>{j.one(this._element,\"mouseup.dismiss.bs.modal\",(t=>{t.target===this._element&&(this._ignoreBackdropClick=!0)}))})),this._showBackdrop((()=>this._showElement(t))))}hide(){if(!this._isShown||this._isTransitioning)return;if(j.trigger(this._element,\"hide.bs.modal\").defaultPrevented)return;this._isShown=!1;const t=this._isAnimated();t&&(this._isTransitioning=!0),this._setEscapeEvent(),this._setResizeEvent(),this._focustrap.deactivate(),this._element.classList.remove(ji),j.off(this._element,Si),j.off(this._dialog,Ii),this._queueCallback((()=>this._hideModal()),this._element,t)}dispose(){[window,this._dialog].forEach((t=>j.off(t,\".bs.modal\"))),this._backdrop.dispose(),this._focustrap.deactivate(),super.dispose()}handleUpdate(){this._adjustDialog()}_initializeBackDrop(){return new bi({isVisible:Boolean(this._config.backdrop),isAnimated:this._isAnimated()})}_initializeFocusTrap(){return new Ai({trapElement:this._element})}_getConfig(t){return t={...Ci,...U.getDataAttributes(this._element),...\"object\"==typeof t?t:{}},a(Ti,t,ki),t}_showElement(t){const e=this._isAnimated(),i=V.findOne(\".modal-body\",this._dialog);this._element.parentNode&&this._element.parentNode.nodeType===Node.ELEMENT_NODE||document.body.append(this._element),this._element.style.display=\"block\",this._element.removeAttribute(\"aria-hidden\"),this._element.setAttribute(\"aria-modal\",!0),this._element.setAttribute(\"role\",\"dialog\"),this._element.scrollTop=0,i&&(i.scrollTop=0),e&&u(this._element),this._element.classList.add(ji),this._queueCallback((()=>{this._config.focus&&this._focustrap.activate(),this._isTransitioning=!1,j.trigger(this._element,\"shown.bs.modal\",{relatedTarget:t})}),this._dialog,e)}_setEscapeEvent(){this._isShown?j.on(this._element,Ni,(t=>{this._config.keyboard&&t.key===Oi?(t.preventDefault(),this.hide()):this._config.keyboard||t.key!==Oi||this._triggerBackdropTransition()})):j.off(this._element,Ni)}_setResizeEvent(){this._isShown?j.on(window,Di,(()=>this._adjustDialog())):j.off(window,Di)}_hideModal(){this._element.style.display=\"none\",this._element.setAttribute(\"aria-hidden\",!0),this._element.removeAttribute(\"aria-modal\"),this._element.removeAttribute(\"role\"),this._isTransitioning=!1,this._backdrop.hide((()=>{document.body.classList.remove(Pi),this._resetAdjustments(),this._scrollBar.reset(),j.trigger(this._element,Li)}))}_showBackdrop(t){j.on(this._element,Si,(t=>{this._ignoreBackdropClick?this._ignoreBackdropClick=!1:t.target===t.currentTarget&&(!0===this._config.backdrop?this.hide():\"static\"===this._config.backdrop&&this._triggerBackdropTransition())})),this._backdrop.show(t)}_isAnimated(){return this._element.classList.contains(\"fade\")}_triggerBackdropTransition(){if(j.trigger(this._element,\"hidePrevented.bs.modal\").defaultPrevented)return;const{classList:t,scrollHeight:e,style:i}=this._element,n=e>document.documentElement.clientHeight;!n&&\"hidden\"===i.overflowY||t.contains(Mi)||(n||(i.overflowY=\"hidden\"),t.add(Mi),this._queueCallback((()=>{t.remove(Mi),n||this._queueCallback((()=>{i.overflowY=\"\"}),this._dialog)}),this._dialog),this._element.focus())}_adjustDialog(){const t=this._element.scrollHeight>document.documentElement.clientHeight,e=this._scrollBar.getWidth(),i=e>0;(!i&&t&&!m()||i&&!t&&m())&&(this._element.style.paddingLeft=`${e}px`),(i&&!t&&!m()||!i&&t&&m())&&(this._element.style.paddingRight=`${e}px`)}_resetAdjustments(){this._element.style.paddingLeft=\"\",this._element.style.paddingRight=\"\"}static jQueryInterface(t,e){return this.each((function(){const i=Hi.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===i[t])throw new TypeError(`No method named \"${t}\"`);i[t](e)}}))}}j.on(document,\"click.bs.modal.data-api\",'[data-bs-toggle=\"modal\"]',(function(t){const e=n(this);[\"A\",\"AREA\"].includes(this.tagName)&&t.preventDefault(),j.one(e,xi,(t=>{t.defaultPrevented||j.one(e,Li,(()=>{l(this)&&this.focus()}))}));const i=V.findOne(\".modal.show\");i&&Hi.getInstance(i).hide(),Hi.getOrCreateInstance(e).toggle(this)})),R(Hi),g(Hi);const Bi=\"offcanvas\",Ri={backdrop:!0,keyboard:!0,scroll:!1},Wi={backdrop:\"boolean\",keyboard:\"boolean\",scroll:\"boolean\"},$i=\"show\",zi=\".offcanvas.show\",qi=\"hidden.bs.offcanvas\";class Fi extends B{constructor(t,e){super(t),this._config=this._getConfig(e),this._isShown=!1,this._backdrop=this._initializeBackDrop(),this._focustrap=this._initializeFocusTrap(),this._addEventListeners()}static get NAME(){return Bi}static get Default(){return Ri}toggle(t){return this._isShown?this.hide():this.show(t)}show(t){this._isShown||j.trigger(this._element,\"show.bs.offcanvas\",{relatedTarget:t}).defaultPrevented||(this._isShown=!0,this._element.style.visibility=\"visible\",this._backdrop.show(),this._config.scroll||(new fi).hide(),this._element.removeAttribute(\"aria-hidden\"),this._element.setAttribute(\"aria-modal\",!0),this._element.setAttribute(\"role\",\"dialog\"),this._element.classList.add($i),this._queueCallback((()=>{this._config.scroll||this._focustrap.activate(),j.trigger(this._element,\"shown.bs.offcanvas\",{relatedTarget:t})}),this._element,!0))}hide(){this._isShown&&(j.trigger(this._element,\"hide.bs.offcanvas\").defaultPrevented||(this._focustrap.deactivate(),this._element.blur(),this._isShown=!1,this._element.classList.remove($i),this._backdrop.hide(),this._queueCallback((()=>{this._element.setAttribute(\"aria-hidden\",!0),this._element.removeAttribute(\"aria-modal\"),this._element.removeAttribute(\"role\"),this._element.style.visibility=\"hidden\",this._config.scroll||(new fi).reset(),j.trigger(this._element,qi)}),this._element,!0)))}dispose(){this._backdrop.dispose(),this._focustrap.deactivate(),super.dispose()}_getConfig(t){return t={...Ri,...U.getDataAttributes(this._element),...\"object\"==typeof t?t:{}},a(Bi,t,Wi),t}_initializeBackDrop(){return new bi({className:\"offcanvas-backdrop\",isVisible:this._config.backdrop,isAnimated:!0,rootElement:this._element.parentNode,clickCallback:()=>this.hide()})}_initializeFocusTrap(){return new Ai({trapElement:this._element})}_addEventListeners(){j.on(this._element,\"keydown.dismiss.bs.offcanvas\",(t=>{this._config.keyboard&&\"Escape\"===t.key&&this.hide()}))}static jQueryInterface(t){return this.each((function(){const e=Fi.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===e[t]||t.startsWith(\"_\")||\"constructor\"===t)throw new TypeError(`No method named \"${t}\"`);e[t](this)}}))}}j.on(document,\"click.bs.offcanvas.data-api\",'[data-bs-toggle=\"offcanvas\"]',(function(t){const e=n(this);if([\"A\",\"AREA\"].includes(this.tagName)&&t.preventDefault(),c(this))return;j.one(e,qi,(()=>{l(this)&&this.focus()}));const i=V.findOne(zi);i&&i!==e&&Fi.getInstance(i).hide(),Fi.getOrCreateInstance(e).toggle(this)})),j.on(window,\"load.bs.offcanvas.data-api\",(()=>V.find(zi).forEach((t=>Fi.getOrCreateInstance(t).show())))),R(Fi),g(Fi);const Ui=new Set([\"background\",\"cite\",\"href\",\"itemtype\",\"longdesc\",\"poster\",\"src\",\"xlink:href\"]),Vi=/^(?:(?:https?|mailto|ftp|tel|file|sms):|[^#&/:?]*(?:[#/?]|$))/i,Ki=/^data:(?:image\\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\\/(?:mpeg|mp4|ogg|webm)|audio\\/(?:mp3|oga|ogg|opus));base64,[\\d+/a-z]+=*$/i,Xi=(t,e)=>{const i=t.nodeName.toLowerCase();if(e.includes(i))return!Ui.has(i)||Boolean(Vi.test(t.nodeValue)||Ki.test(t.nodeValue));const n=e.filter((t=>t instanceof RegExp));for(let t=0,e=n.length;t<e;t++)if(n[t].test(i))return!0;return!1};function Yi(t,e,i){if(!t.length)return t;if(i&&\"function\"==typeof i)return i(t);const n=(new window.DOMParser).parseFromString(t,\"text/html\"),s=[].concat(...n.body.querySelectorAll(\"*\"));for(let t=0,i=s.length;t<i;t++){const i=s[t],n=i.nodeName.toLowerCase();if(!Object.keys(e).includes(n)){i.remove();continue}const o=[].concat(...i.attributes),r=[].concat(e[\"*\"]||[],e[n]||[]);o.forEach((t=>{Xi(t,r)||i.removeAttribute(t.nodeName)}))}return n.body.innerHTML}const Qi=\"tooltip\",Gi=new Set([\"sanitize\",\"allowList\",\"sanitizeFn\"]),Zi={animation:\"boolean\",template:\"string\",title:\"(string|element|function)\",trigger:\"string\",delay:\"(number|object)\",html:\"boolean\",selector:\"(string|boolean)\",placement:\"(string|function)\",offset:\"(array|string|function)\",container:\"(string|element|boolean)\",fallbackPlacements:\"array\",boundary:\"(string|element)\",customClass:\"(string|function)\",sanitize:\"boolean\",sanitizeFn:\"(null|function)\",allowList:\"object\",popperConfig:\"(null|object|function)\"},Ji={AUTO:\"auto\",TOP:\"top\",RIGHT:m()?\"left\":\"right\",BOTTOM:\"bottom\",LEFT:m()?\"right\":\"left\"},tn={animation:!0,template:'<div class=\"tooltip\" role=\"tooltip\"><div class=\"tooltip-arrow\"></div><div class=\"tooltip-inner\"></div></div>',trigger:\"hover focus\",title:\"\",delay:0,html:!1,selector:!1,placement:\"top\",offset:[0,0],container:!1,fallbackPlacements:[\"top\",\"right\",\"bottom\",\"left\"],boundary:\"clippingParents\",customClass:\"\",sanitize:!0,sanitizeFn:null,allowList:{\"*\":[\"class\",\"dir\",\"id\",\"lang\",\"role\",/^aria-[\\w-]*$/i],a:[\"target\",\"href\",\"title\",\"rel\"],area:[],b:[],br:[],col:[],code:[],div:[],em:[],hr:[],h1:[],h2:[],h3:[],h4:[],h5:[],h6:[],i:[],img:[\"src\",\"srcset\",\"alt\",\"title\",\"width\",\"height\"],li:[],ol:[],p:[],pre:[],s:[],small:[],span:[],sub:[],sup:[],strong:[],u:[],ul:[]},popperConfig:null},en={HIDE:\"hide.bs.tooltip\",HIDDEN:\"hidden.bs.tooltip\",SHOW:\"show.bs.tooltip\",SHOWN:\"shown.bs.tooltip\",INSERTED:\"inserted.bs.tooltip\",CLICK:\"click.bs.tooltip\",FOCUSIN:\"focusin.bs.tooltip\",FOCUSOUT:\"focusout.bs.tooltip\",MOUSEENTER:\"mouseenter.bs.tooltip\",MOUSELEAVE:\"mouseleave.bs.tooltip\"},nn=\"fade\",sn=\"show\",on=\"show\",rn=\"out\",an=\".tooltip-inner\",ln=\".modal\",cn=\"hide.bs.modal\",hn=\"hover\",dn=\"focus\";class un extends B{constructor(t,e){if(void 0===Fe)throw new TypeError(\"Bootstrap's tooltips require Popper (https://popper.js.org)\");super(t),this._isEnabled=!0,this._timeout=0,this._hoverState=\"\",this._activeTrigger={},this._popper=null,this._config=this._getConfig(e),this.tip=null,this._setListeners()}static get Default(){return tn}static get NAME(){return Qi}static get Event(){return en}static get DefaultType(){return Zi}enable(){this._isEnabled=!0}disable(){this._isEnabled=!1}toggleEnabled(){this._isEnabled=!this._isEnabled}toggle(t){if(this._isEnabled)if(t){const e=this._initializeOnDelegatedTarget(t);e._activeTrigger.click=!e._activeTrigger.click,e._isWithActiveTrigger()?e._enter(null,e):e._leave(null,e)}else{if(this.getTipElement().classList.contains(sn))return void this._leave(null,this);this._enter(null,this)}}dispose(){clearTimeout(this._timeout),j.off(this._element.closest(ln),cn,this._hideModalHandler),this.tip&&this.tip.remove(),this._disposePopper(),super.dispose()}show(){if(\"none\"===this._element.style.display)throw new Error(\"Please use show on visible elements\");if(!this.isWithContent()||!this._isEnabled)return;const t=j.trigger(this._element,this.constructor.Event.SHOW),e=h(this._element),i=null===e?this._element.ownerDocument.documentElement.contains(this._element):e.contains(this._element);if(t.defaultPrevented||!i)return;\"tooltip\"===this.constructor.NAME&&this.tip&&this.getTitle()!==this.tip.querySelector(an).innerHTML&&(this._disposePopper(),this.tip.remove(),this.tip=null);const n=this.getTipElement(),s=(t=>{do{t+=Math.floor(1e6*Math.random())}while(document.getElementById(t));return t})(this.constructor.NAME);n.setAttribute(\"id\",s),this._element.setAttribute(\"aria-describedby\",s),this._config.animation&&n.classList.add(nn);const o=\"function\"==typeof this._config.placement?this._config.placement.call(this,n,this._element):this._config.placement,r=this._getAttachment(o);this._addAttachmentClass(r);const{container:a}=this._config;H.set(n,this.constructor.DATA_KEY,this),this._element.ownerDocument.documentElement.contains(this.tip)||(a.append(n),j.trigger(this._element,this.constructor.Event.INSERTED)),this._popper?this._popper.update():this._popper=qe(this._element,n,this._getPopperConfig(r)),n.classList.add(sn);const l=this._resolvePossibleFunction(this._config.customClass);l&&n.classList.add(...l.split(\" \")),\"ontouchstart\"in document.documentElement&&[].concat(...document.body.children).forEach((t=>{j.on(t,\"mouseover\",d)}));const c=this.tip.classList.contains(nn);this._queueCallback((()=>{const t=this._hoverState;this._hoverState=null,j.trigger(this._element,this.constructor.Event.SHOWN),t===rn&&this._leave(null,this)}),this.tip,c)}hide(){if(!this._popper)return;const t=this.getTipElement();if(j.trigger(this._element,this.constructor.Event.HIDE).defaultPrevented)return;t.classList.remove(sn),\"ontouchstart\"in document.documentElement&&[].concat(...document.body.children).forEach((t=>j.off(t,\"mouseover\",d))),this._activeTrigger.click=!1,this._activeTrigger.focus=!1,this._activeTrigger.hover=!1;const e=this.tip.classList.contains(nn);this._queueCallback((()=>{this._isWithActiveTrigger()||(this._hoverState!==on&&t.remove(),this._cleanTipClass(),this._element.removeAttribute(\"aria-describedby\"),j.trigger(this._element,this.constructor.Event.HIDDEN),this._disposePopper())}),this.tip,e),this._hoverState=\"\"}update(){null!==this._popper&&this._popper.update()}isWithContent(){return Boolean(this.getTitle())}getTipElement(){if(this.tip)return this.tip;const t=document.createElement(\"div\");t.innerHTML=this._config.template;const e=t.children[0];return this.setContent(e),e.classList.remove(nn,sn),this.tip=e,this.tip}setContent(t){this._sanitizeAndSetContent(t,this.getTitle(),an)}_sanitizeAndSetContent(t,e,i){const n=V.findOne(i,t);e||!n?this.setElementContent(n,e):n.remove()}setElementContent(t,e){if(null!==t)return o(e)?(e=r(e),void(this._config.html?e.parentNode!==t&&(t.innerHTML=\"\",t.append(e)):t.textContent=e.textContent)):void(this._config.html?(this._config.sanitize&&(e=Yi(e,this._config.allowList,this._config.sanitizeFn)),t.innerHTML=e):t.textContent=e)}getTitle(){const t=this._element.getAttribute(\"data-bs-original-title\")||this._config.title;return this._resolvePossibleFunction(t)}updateAttachment(t){return\"right\"===t?\"end\":\"left\"===t?\"start\":t}_initializeOnDelegatedTarget(t,e){return e||this.constructor.getOrCreateInstance(t.delegateTarget,this._getDelegateConfig())}_getOffset(){const{offset:t}=this._config;return\"string\"==typeof t?t.split(\",\").map((t=>Number.parseInt(t,10))):\"function\"==typeof t?e=>t(e,this._element):t}_resolvePossibleFunction(t){return\"function\"==typeof t?t.call(this._element):t}_getPopperConfig(t){const e={placement:t,modifiers:[{name:\"flip\",options:{fallbackPlacements:this._config.fallbackPlacements}},{name:\"offset\",options:{offset:this._getOffset()}},{name:\"preventOverflow\",options:{boundary:this._config.boundary}},{name:\"arrow\",options:{element:`.${this.constructor.NAME}-arrow`}},{name:\"onChange\",enabled:!0,phase:\"afterWrite\",fn:t=>this._handlePopperPlacementChange(t)}],onFirstUpdate:t=>{t.options.placement!==t.placement&&this._handlePopperPlacementChange(t)}};return{...e,...\"function\"==typeof this._config.popperConfig?this._config.popperConfig(e):this._config.popperConfig}}_addAttachmentClass(t){this.getTipElement().classList.add(`${this._getBasicClassPrefix()}-${this.updateAttachment(t)}`)}_getAttachment(t){return Ji[t.toUpperCase()]}_setListeners(){this._config.trigger.split(\" \").forEach((t=>{if(\"click\"===t)j.on(this._element,this.constructor.Event.CLICK,this._config.selector,(t=>this.toggle(t)));else if(\"manual\"!==t){const e=t===hn?this.constructor.Event.MOUSEENTER:this.constructor.Event.FOCUSIN,i=t===hn?this.constructor.Event.MOUSELEAVE:this.constructor.Event.FOCUSOUT;j.on(this._element,e,this._config.selector,(t=>this._enter(t))),j.on(this._element,i,this._config.selector,(t=>this._leave(t)))}})),this._hideModalHandler=()=>{this._element&&this.hide()},j.on(this._element.closest(ln),cn,this._hideModalHandler),this._config.selector?this._config={...this._config,trigger:\"manual\",selector:\"\"}:this._fixTitle()}_fixTitle(){const t=this._element.getAttribute(\"title\"),e=typeof this._element.getAttribute(\"data-bs-original-title\");(t||\"string\"!==e)&&(this._element.setAttribute(\"data-bs-original-title\",t||\"\"),!t||this._element.getAttribute(\"aria-label\")||this._element.textContent||this._element.setAttribute(\"aria-label\",t),this._element.setAttribute(\"title\",\"\"))}_enter(t,e){e=this._initializeOnDelegatedTarget(t,e),t&&(e._activeTrigger[\"focusin\"===t.type?dn:hn]=!0),e.getTipElement().classList.contains(sn)||e._hoverState===on?e._hoverState=on:(clearTimeout(e._timeout),e._hoverState=on,e._config.delay&&e._config.delay.show?e._timeout=setTimeout((()=>{e._hoverState===on&&e.show()}),e._config.delay.show):e.show())}_leave(t,e){e=this._initializeOnDelegatedTarget(t,e),t&&(e._activeTrigger[\"focusout\"===t.type?dn:hn]=e._element.contains(t.relatedTarget)),e._isWithActiveTrigger()||(clearTimeout(e._timeout),e._hoverState=rn,e._config.delay&&e._config.delay.hide?e._timeout=setTimeout((()=>{e._hoverState===rn&&e.hide()}),e._config.delay.hide):e.hide())}_isWithActiveTrigger(){for(const t in this._activeTrigger)if(this._activeTrigger[t])return!0;return!1}_getConfig(t){const e=U.getDataAttributes(this._element);return Object.keys(e).forEach((t=>{Gi.has(t)&&delete e[t]})),(t={...this.constructor.Default,...e,...\"object\"==typeof t&&t?t:{}}).container=!1===t.container?document.body:r(t.container),\"number\"==typeof t.delay&&(t.delay={show:t.delay,hide:t.delay}),\"number\"==typeof t.title&&(t.title=t.title.toString()),\"number\"==typeof t.content&&(t.content=t.content.toString()),a(Qi,t,this.constructor.DefaultType),t.sanitize&&(t.template=Yi(t.template,t.allowList,t.sanitizeFn)),t}_getDelegateConfig(){const t={};for(const e in this._config)this.constructor.Default[e]!==this._config[e]&&(t[e]=this._config[e]);return t}_cleanTipClass(){const t=this.getTipElement(),e=new RegExp(`(^|\\\\s)${this._getBasicClassPrefix()}\\\\S+`,\"g\"),i=t.getAttribute(\"class\").match(e);null!==i&&i.length>0&&i.map((t=>t.trim())).forEach((e=>t.classList.remove(e)))}_getBasicClassPrefix(){return\"bs-tooltip\"}_handlePopperPlacementChange(t){const{state:e}=t;e&&(this.tip=e.elements.popper,this._cleanTipClass(),this._addAttachmentClass(this._getAttachment(e.placement)))}_disposePopper(){this._popper&&(this._popper.destroy(),this._popper=null)}static jQueryInterface(t){return this.each((function(){const e=un.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===e[t])throw new TypeError(`No method named \"${t}\"`);e[t]()}}))}}g(un);const fn={...un.Default,placement:\"right\",offset:[0,8],trigger:\"click\",content:\"\",template:'<div class=\"popover\" role=\"tooltip\"><div class=\"popover-arrow\"></div><h3 class=\"popover-header\"></h3><div class=\"popover-body\"></div></div>'},pn={...un.DefaultType,content:\"(string|element|function)\"},mn={HIDE:\"hide.bs.popover\",HIDDEN:\"hidden.bs.popover\",SHOW:\"show.bs.popover\",SHOWN:\"shown.bs.popover\",INSERTED:\"inserted.bs.popover\",CLICK:\"click.bs.popover\",FOCUSIN:\"focusin.bs.popover\",FOCUSOUT:\"focusout.bs.popover\",MOUSEENTER:\"mouseenter.bs.popover\",MOUSELEAVE:\"mouseleave.bs.popover\"};class gn extends un{static get Default(){return fn}static get NAME(){return\"popover\"}static get Event(){return mn}static get DefaultType(){return pn}isWithContent(){return this.getTitle()||this._getContent()}setContent(t){this._sanitizeAndSetContent(t,this.getTitle(),\".popover-header\"),this._sanitizeAndSetContent(t,this._getContent(),\".popover-body\")}_getContent(){return this._resolvePossibleFunction(this._config.content)}_getBasicClassPrefix(){return\"bs-popover\"}static jQueryInterface(t){return this.each((function(){const e=gn.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===e[t])throw new TypeError(`No method named \"${t}\"`);e[t]()}}))}}g(gn);const _n=\"scrollspy\",bn={offset:10,method:\"auto\",target:\"\"},vn={offset:\"number\",method:\"string\",target:\"(string|element)\"},yn=\"active\",wn=\".nav-link, .list-group-item, .dropdown-item\",En=\"position\";class An extends B{constructor(t,e){super(t),this._scrollElement=\"BODY\"===this._element.tagName?window:this._element,this._config=this._getConfig(e),this._offsets=[],this._targets=[],this._activeTarget=null,this._scrollHeight=0,j.on(this._scrollElement,\"scroll.bs.scrollspy\",(()=>this._process())),this.refresh(),this._process()}static get Default(){return bn}static get NAME(){return _n}refresh(){const t=this._scrollElement===this._scrollElement.window?\"offset\":En,e=\"auto\"===this._config.method?t:this._config.method,n=e===En?this._getScrollTop():0;this._offsets=[],this._targets=[],this._scrollHeight=this._getScrollHeight(),V.find(wn,this._config.target).map((t=>{const s=i(t),o=s?V.findOne(s):null;if(o){const t=o.getBoundingClientRect();if(t.width||t.height)return[U[e](o).top+n,s]}return null})).filter((t=>t)).sort(((t,e)=>t[0]-e[0])).forEach((t=>{this._offsets.push(t[0]),this._targets.push(t[1])}))}dispose(){j.off(this._scrollElement,\".bs.scrollspy\"),super.dispose()}_getConfig(t){return(t={...bn,...U.getDataAttributes(this._element),...\"object\"==typeof t&&t?t:{}}).target=r(t.target)||document.documentElement,a(_n,t,vn),t}_getScrollTop(){return this._scrollElement===window?this._scrollElement.pageYOffset:this._scrollElement.scrollTop}_getScrollHeight(){return this._scrollElement.scrollHeight||Math.max(document.body.scrollHeight,document.documentElement.scrollHeight)}_getOffsetHeight(){return this._scrollElement===window?window.innerHeight:this._scrollElement.getBoundingClientRect().height}_process(){const t=this._getScrollTop()+this._config.offset,e=this._getScrollHeight(),i=this._config.offset+e-this._getOffsetHeight();if(this._scrollHeight!==e&&this.refresh(),t>=i){const t=this._targets[this._targets.length-1];this._activeTarget!==t&&this._activate(t)}else{if(this._activeTarget&&t<this._offsets[0]&&this._offsets[0]>0)return this._activeTarget=null,void this._clear();for(let e=this._offsets.length;e--;)this._activeTarget!==this._targets[e]&&t>=this._offsets[e]&&(void 0===this._offsets[e+1]||t<this._offsets[e+1])&&this._activate(this._targets[e])}}_activate(t){this._activeTarget=t,this._clear();const e=wn.split(\",\").map((e=>`${e}[data-bs-target=\"${t}\"],${e}[href=\"${t}\"]`)),i=V.findOne(e.join(\",\"),this._config.target);i.classList.add(yn),i.classList.contains(\"dropdown-item\")?V.findOne(\".dropdown-toggle\",i.closest(\".dropdown\")).classList.add(yn):V.parents(i,\".nav, .list-group\").forEach((t=>{V.prev(t,\".nav-link, .list-group-item\").forEach((t=>t.classList.add(yn))),V.prev(t,\".nav-item\").forEach((t=>{V.children(t,\".nav-link\").forEach((t=>t.classList.add(yn)))}))})),j.trigger(this._scrollElement,\"activate.bs.scrollspy\",{relatedTarget:t})}_clear(){V.find(wn,this._config.target).filter((t=>t.classList.contains(yn))).forEach((t=>t.classList.remove(yn)))}static jQueryInterface(t){return this.each((function(){const e=An.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===e[t])throw new TypeError(`No method named \"${t}\"`);e[t]()}}))}}j.on(window,\"load.bs.scrollspy.data-api\",(()=>{V.find('[data-bs-spy=\"scroll\"]').forEach((t=>new An(t)))})),g(An);const Tn=\"active\",On=\"fade\",Cn=\"show\",kn=\".active\",Ln=\":scope > li > .active\";class xn extends B{static get NAME(){return\"tab\"}show(){if(this._element.parentNode&&this._element.parentNode.nodeType===Node.ELEMENT_NODE&&this._element.classList.contains(Tn))return;let t;const e=n(this._element),i=this._element.closest(\".nav, .list-group\");if(i){const e=\"UL\"===i.nodeName||\"OL\"===i.nodeName?Ln:kn;t=V.find(e,i),t=t[t.length-1]}const s=t?j.trigger(t,\"hide.bs.tab\",{relatedTarget:this._element}):null;if(j.trigger(this._element,\"show.bs.tab\",{relatedTarget:t}).defaultPrevented||null!==s&&s.defaultPrevented)return;this._activate(this._element,i);const o=()=>{j.trigger(t,\"hidden.bs.tab\",{relatedTarget:this._element}),j.trigger(this._element,\"shown.bs.tab\",{relatedTarget:t})};e?this._activate(e,e.parentNode,o):o()}_activate(t,e,i){const n=(!e||\"UL\"!==e.nodeName&&\"OL\"!==e.nodeName?V.children(e,kn):V.find(Ln,e))[0],s=i&&n&&n.classList.contains(On),o=()=>this._transitionComplete(t,n,i);n&&s?(n.classList.remove(Cn),this._queueCallback(o,t,!0)):o()}_transitionComplete(t,e,i){if(e){e.classList.remove(Tn);const t=V.findOne(\":scope > .dropdown-menu .active\",e.parentNode);t&&t.classList.remove(Tn),\"tab\"===e.getAttribute(\"role\")&&e.setAttribute(\"aria-selected\",!1)}t.classList.add(Tn),\"tab\"===t.getAttribute(\"role\")&&t.setAttribute(\"aria-selected\",!0),u(t),t.classList.contains(On)&&t.classList.add(Cn);let n=t.parentNode;if(n&&\"LI\"===n.nodeName&&(n=n.parentNode),n&&n.classList.contains(\"dropdown-menu\")){const e=t.closest(\".dropdown\");e&&V.find(\".dropdown-toggle\",e).forEach((t=>t.classList.add(Tn))),t.setAttribute(\"aria-expanded\",!0)}i&&i()}static jQueryInterface(t){return this.each((function(){const e=xn.getOrCreateInstance(this);if(\"string\"==typeof t){if(void 0===e[t])throw new TypeError(`No method named \"${t}\"`);e[t]()}}))}}j.on(document,\"click.bs.tab.data-api\",'[data-bs-toggle=\"tab\"], [data-bs-toggle=\"pill\"], [data-bs-toggle=\"list\"]',(function(t){[\"A\",\"AREA\"].includes(this.tagName)&&t.preventDefault(),c(this)||xn.getOrCreateInstance(this).show()})),g(xn);const Dn=\"toast\",Sn=\"hide\",Nn=\"show\",In=\"showing\",Pn={animation:\"boolean\",autohide:\"boolean\",delay:\"number\"},jn={animation:!0,autohide:!0,delay:5e3};class Mn extends B{constructor(t,e){super(t),this._config=this._getConfig(e),this._timeout=null,this._hasMouseInteraction=!1,this._hasKeyboardInteraction=!1,this._setListeners()}static get DefaultType(){return Pn}static get Default(){return jn}static get NAME(){return Dn}show(){j.trigger(this._element,\"show.bs.toast\").defaultPrevented||(this._clearTimeout(),this._config.animation&&this._element.classList.add(\"fade\"),this._element.classList.remove(Sn),u(this._element),this._element.classList.add(Nn),this._element.classList.add(In),this._queueCallback((()=>{this._element.classList.remove(In),j.trigger(this._element,\"shown.bs.toast\"),this._maybeScheduleHide()}),this._element,this._config.animation))}hide(){this._element.classList.contains(Nn)&&(j.trigger(this._element,\"hide.bs.toast\").defaultPrevented||(this._element.classList.add(In),this._queueCallback((()=>{this._element.classList.add(Sn),this._element.classList.remove(In),this._element.classList.remove(Nn),j.trigger(this._element,\"hidden.bs.toast\")}),this._element,this._config.animation)))}dispose(){this._clearTimeout(),this._element.classList.contains(Nn)&&this._element.classList.remove(Nn),super.dispose()}_getConfig(t){return t={...jn,...U.getDataAttributes(this._element),...\"object\"==typeof t&&t?t:{}},a(Dn,t,this.constructor.DefaultType),t}_maybeScheduleHide(){this._config.autohide&&(this._hasMouseInteraction||this._hasKeyboardInteraction||(this._timeout=setTimeout((()=>{this.hide()}),this._config.delay)))}_onInteraction(t,e){switch(t.type){case\"mouseover\":case\"mouseout\":this._hasMouseInteraction=e;break;case\"focusin\":case\"focusout\":this._hasKeyboardInteraction=e}if(e)return void this._clearTimeout();const i=t.relatedTarget;this._element===i||this._element.contains(i)||this._maybeScheduleHide()}_setListeners(){j.on(this._element,\"mouseover.bs.toast\",(t=>this._onInteraction(t,!0))),j.on(this._element,\"mouseout.bs.toast\",(t=>this._onInteraction(t,!1))),j.on(this._element,\"focusin.bs.toast\",(t=>this._onInteraction(t,!0))),j.on(this._element,\"focusout.bs.toast\",(t=>this._onInteraction(t,!1)))}_clearTimeout(){clearTimeout(this._timeout),this._timeout=null}static jQueryInterface(t){return this.each((function(){const e=Mn.getOrCreateInstance(this,t);if(\"string\"==typeof t){if(void 0===e[t])throw new TypeError(`No method named \"${t}\"`);e[t](this)}}))}}return R(Mn),g(Mn),{Alert:W,Button:z,Carousel:st,Collapse:pt,Dropdown:hi,Modal:Hi,Offcanvas:Fi,Popover:gn,ScrollSpy:An,Tab:xn,Toast:Mn,Tooltip:un}}));\n//# sourceMappingURL=bootstrap.bundle.min.js.map","var r=function(r){return function(r){return!!r&&\"object\"==typeof r}(r)&&!function(r){var t=Object.prototype.toString.call(r);return\"[object RegExp]\"===t||\"[object Date]\"===t||function(r){return r.$$typeof===e}(r)}(r)},e=\"function\"==typeof Symbol&&Symbol.for?Symbol.for(\"react.element\"):60103;function t(r,e){return!1!==e.clone&&e.isMergeableObject(r)?u(Array.isArray(r)?[]:{},r,e):r}function n(r,e,n){return r.concat(e).map(function(r){return t(r,n)})}function o(r){return Object.keys(r).concat(function(r){return Object.getOwnPropertySymbols?Object.getOwnPropertySymbols(r).filter(function(e){return r.propertyIsEnumerable(e)}):[]}(r))}function c(r,e){try{return e in r}catch(r){return!1}}function u(e,i,a){(a=a||{}).arrayMerge=a.arrayMerge||n,a.isMergeableObject=a.isMergeableObject||r,a.cloneUnlessOtherwiseSpecified=t;var f=Array.isArray(i);return f===Array.isArray(e)?f?a.arrayMerge(e,i,a):function(r,e,n){var i={};return n.isMergeableObject(r)&&o(r).forEach(function(e){i[e]=t(r[e],n)}),o(e).forEach(function(o){(function(r,e){return c(r,e)&&!(Object.hasOwnProperty.call(r,e)&&Object.propertyIsEnumerable.call(r,e))})(r,o)||(i[o]=c(r,o)&&n.isMergeableObject(e[o])?function(r,e){if(!e.customMerge)return u;var t=e.customMerge(r);return\"function\"==typeof t?t:u}(o,n)(r[o],e[o],n):t(e[o],n))}),i}(e,i,a):t(i,a)}u.all=function(r,e){if(!Array.isArray(r))throw new Error(\"first argument should be an array\");return r.reduce(function(r,t){return u(r,t,e)},{})};var i=u;function a(r){var e=(r=r||{}).storage||window&&window.localStorage,t=r.key||\"vuex\";function n(r,e){var t=e.getItem(r);try{return void 0!==t?JSON.parse(t):void 0}catch(r){}}function o(){return!0}function c(r,e,t){return t.setItem(r,JSON.stringify(e))}function u(r,e){return Array.isArray(e)?e.reduce(function(e,t){return function(r,e,t,n){return!/__proto__/.test(e)&&((e=e.split?e.split(\".\"):e.slice(0)).slice(0,-1).reduce(function(r,e){return r[e]=r[e]||{}},r)[e.pop()]=t),r}(e,t,(n=r,void 0===(n=((o=t).split?o.split(\".\"):o).reduce(function(r,e){return r&&r[e]},n))?void 0:n));var n,o},{}):r}function a(r){return function(e){return r.subscribe(e)}}(r.assertStorage||function(){e.setItem(\"@@\",1),e.removeItem(\"@@\")})(e);var f,s=function(){return(r.getState||n)(t,e)};return r.fetchBeforeUse&&(f=s()),function(n){r.fetchBeforeUse||(f=s()),\"object\"==typeof f&&null!==f&&(n.replaceState(r.overwrite?f:i(n.state,f,{arrayMerge:r.arrayMerger||function(r,e){return e},clone:!1})),(r.rehydrated||function(){})(n)),(r.subscriber||a)(n)(function(n,i){(r.filter||o)(n)&&(r.setState||c)(t,(r.reducer||u)(i,r.paths),e)})}}export default a;\n//# sourceMappingURL=vuex-persistedstate.es.js.map\n","var parseKeys = require('parse-asn1')\nvar mgf = require('./mgf')\nvar xor = require('./xor')\nvar BN = require('bn.js')\nvar crt = require('browserify-rsa')\nvar createHash = require('create-hash')\nvar withPublic = require('./withPublic')\nvar Buffer = require('safe-buffer').Buffer\n\nmodule.exports = function privateDecrypt (privateKey, enc, reverse) {\n  var padding\n  if (privateKey.padding) {\n    padding = privateKey.padding\n  } else if (reverse) {\n    padding = 1\n  } else {\n    padding = 4\n  }\n\n  var key = parseKeys(privateKey)\n  var k = key.modulus.byteLength()\n  if (enc.length > k || new BN(enc).cmp(key.modulus) >= 0) {\n    throw new Error('decryption error')\n  }\n  var msg\n  if (reverse) {\n    msg = withPublic(new BN(enc), key)\n  } else {\n    msg = crt(enc, key)\n  }\n  var zBuffer = Buffer.alloc(k - msg.length)\n  msg = Buffer.concat([zBuffer, msg], k)\n  if (padding === 4) {\n    return oaep(key, msg)\n  } else if (padding === 1) {\n    return pkcs1(key, msg, reverse)\n  } else if (padding === 3) {\n    return msg\n  } else {\n    throw new Error('unknown padding')\n  }\n}\n\nfunction oaep (key, msg) {\n  var k = key.modulus.byteLength()\n  var iHash = createHash('sha1').update(Buffer.alloc(0)).digest()\n  var hLen = iHash.length\n  if (msg[0] !== 0) {\n    throw new Error('decryption error')\n  }\n  var maskedSeed = msg.slice(1, hLen + 1)\n  var maskedDb = msg.slice(hLen + 1)\n  var seed = xor(maskedSeed, mgf(maskedDb, hLen))\n  var db = xor(maskedDb, mgf(seed, k - hLen - 1))\n  if (compare(iHash, db.slice(0, hLen))) {\n    throw new Error('decryption error')\n  }\n  var i = hLen\n  while (db[i] === 0) {\n    i++\n  }\n  if (db[i++] !== 1) {\n    throw new Error('decryption error')\n  }\n  return db.slice(i)\n}\n\nfunction pkcs1 (key, msg, reverse) {\n  var p1 = msg.slice(0, 2)\n  var i = 2\n  var status = 0\n  while (msg[i++] !== 0) {\n    if (i >= msg.length) {\n      status++\n      break\n    }\n  }\n  var ps = msg.slice(2, i - 1)\n\n  if ((p1.toString('hex') !== '0002' && !reverse) || (p1.toString('hex') !== '0001' && reverse)) {\n    status++\n  }\n  if (ps.length < 8) {\n    status++\n  }\n  if (status) {\n    throw new Error('decryption error')\n  }\n  return msg.slice(i)\n}\nfunction compare (a, b) {\n  a = Buffer.from(a)\n  b = Buffer.from(b)\n  var dif = 0\n  var len = a.length\n  if (a.length !== b.length) {\n    dif++\n    len = Math.min(a.length, b.length)\n  }\n  var i = -1\n  while (++i < len) {\n    dif += (a[i] ^ b[i])\n  }\n  return dif\n}\n","import { isHTMLElement } from \"./instanceOf.js\";\nimport { round } from \"../utils/math.js\";\nexport default function getBoundingClientRect(element, includeScale) {\n  if (includeScale === void 0) {\n    includeScale = false;\n  }\n\n  var rect = element.getBoundingClientRect();\n  var scaleX = 1;\n  var scaleY = 1;\n\n  if (isHTMLElement(element) && includeScale) {\n    var offsetHeight = element.offsetHeight;\n    var offsetWidth = element.offsetWidth; // Do not attempt to divide by 0, otherwise we get `Infinity` as scale\n    // Fallback to 1 in case both values are `0`\n\n    if (offsetWidth > 0) {\n      scaleX = round(rect.width) / offsetWidth || 1;\n    }\n\n    if (offsetHeight > 0) {\n      scaleY = round(rect.height) / offsetHeight || 1;\n    }\n  }\n\n  return {\n    width: rect.width / scaleX,\n    height: rect.height / scaleY,\n    top: rect.top / scaleY,\n    right: rect.right / scaleX,\n    bottom: rect.bottom / scaleY,\n    left: rect.left / scaleX,\n    x: rect.left / scaleX,\n    y: rect.top / scaleY\n  };\n}",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/** @preserve\n\t(c) 2012 by Cédric Mesnil. All rights reserved.\n\n\tRedistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:\n\n\t    - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.\n\t    - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.\n\n\tTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\t*/\n\n\t(function (Math) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var Hasher = C_lib.Hasher;\n\t    var C_algo = C.algo;\n\n\t    // Constants table\n\t    var _zl = WordArray.create([\n\t        0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,\n\t        7,  4, 13,  1, 10,  6, 15,  3, 12,  0,  9,  5,  2, 14, 11,  8,\n\t        3, 10, 14,  4,  9, 15,  8,  1,  2,  7,  0,  6, 13, 11,  5, 12,\n\t        1,  9, 11, 10,  0,  8, 12,  4, 13,  3,  7, 15, 14,  5,  6,  2,\n\t        4,  0,  5,  9,  7, 12,  2, 10, 14,  1,  3,  8, 11,  6, 15, 13]);\n\t    var _zr = WordArray.create([\n\t        5, 14,  7,  0,  9,  2, 11,  4, 13,  6, 15,  8,  1, 10,  3, 12,\n\t        6, 11,  3,  7,  0, 13,  5, 10, 14, 15,  8, 12,  4,  9,  1,  2,\n\t        15,  5,  1,  3,  7, 14,  6,  9, 11,  8, 12,  2, 10,  0,  4, 13,\n\t        8,  6,  4,  1,  3, 11, 15,  0,  5, 12,  2, 13,  9,  7, 10, 14,\n\t        12, 15, 10,  4,  1,  5,  8,  7,  6,  2, 13, 14,  0,  3,  9, 11]);\n\t    var _sl = WordArray.create([\n\t         11, 14, 15, 12,  5,  8,  7,  9, 11, 13, 14, 15,  6,  7,  9,  8,\n\t        7, 6,   8, 13, 11,  9,  7, 15,  7, 12, 15,  9, 11,  7, 13, 12,\n\t        11, 13,  6,  7, 14,  9, 13, 15, 14,  8, 13,  6,  5, 12,  7,  5,\n\t          11, 12, 14, 15, 14, 15,  9,  8,  9, 14,  5,  6,  8,  6,  5, 12,\n\t        9, 15,  5, 11,  6,  8, 13, 12,  5, 12, 13, 14, 11,  8,  5,  6 ]);\n\t    var _sr = WordArray.create([\n\t        8,  9,  9, 11, 13, 15, 15,  5,  7,  7,  8, 11, 14, 14, 12,  6,\n\t        9, 13, 15,  7, 12,  8,  9, 11,  7,  7, 12,  7,  6, 15, 13, 11,\n\t        9,  7, 15, 11,  8,  6,  6, 14, 12, 13,  5, 14, 13, 13,  7,  5,\n\t        15,  5,  8, 11, 14, 14,  6, 14,  6,  9, 12,  9, 12,  5, 15,  8,\n\t        8,  5, 12,  9, 12,  5, 14,  6,  8, 13,  6,  5, 15, 13, 11, 11 ]);\n\n\t    var _hl =  WordArray.create([ 0x00000000, 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xA953FD4E]);\n\t    var _hr =  WordArray.create([ 0x50A28BE6, 0x5C4DD124, 0x6D703EF3, 0x7A6D76E9, 0x00000000]);\n\n\t    /**\n\t     * RIPEMD160 hash algorithm.\n\t     */\n\t    var RIPEMD160 = C_algo.RIPEMD160 = Hasher.extend({\n\t        _doReset: function () {\n\t            this._hash  = WordArray.create([0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0]);\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\n\t            // Swap endian\n\t            for (var i = 0; i < 16; i++) {\n\t                // Shortcuts\n\t                var offset_i = offset + i;\n\t                var M_offset_i = M[offset_i];\n\n\t                // Swap\n\t                M[offset_i] = (\n\t                    (((M_offset_i << 8)  | (M_offset_i >>> 24)) & 0x00ff00ff) |\n\t                    (((M_offset_i << 24) | (M_offset_i >>> 8))  & 0xff00ff00)\n\t                );\n\t            }\n\t            // Shortcut\n\t            var H  = this._hash.words;\n\t            var hl = _hl.words;\n\t            var hr = _hr.words;\n\t            var zl = _zl.words;\n\t            var zr = _zr.words;\n\t            var sl = _sl.words;\n\t            var sr = _sr.words;\n\n\t            // Working variables\n\t            var al, bl, cl, dl, el;\n\t            var ar, br, cr, dr, er;\n\n\t            ar = al = H[0];\n\t            br = bl = H[1];\n\t            cr = cl = H[2];\n\t            dr = dl = H[3];\n\t            er = el = H[4];\n\t            // Computation\n\t            var t;\n\t            for (var i = 0; i < 80; i += 1) {\n\t                t = (al +  M[offset+zl[i]])|0;\n\t                if (i<16){\n\t\t            t +=  f1(bl,cl,dl) + hl[0];\n\t                } else if (i<32) {\n\t\t            t +=  f2(bl,cl,dl) + hl[1];\n\t                } else if (i<48) {\n\t\t            t +=  f3(bl,cl,dl) + hl[2];\n\t                } else if (i<64) {\n\t\t            t +=  f4(bl,cl,dl) + hl[3];\n\t                } else {// if (i<80) {\n\t\t            t +=  f5(bl,cl,dl) + hl[4];\n\t                }\n\t                t = t|0;\n\t                t =  rotl(t,sl[i]);\n\t                t = (t+el)|0;\n\t                al = el;\n\t                el = dl;\n\t                dl = rotl(cl, 10);\n\t                cl = bl;\n\t                bl = t;\n\n\t                t = (ar + M[offset+zr[i]])|0;\n\t                if (i<16){\n\t\t            t +=  f5(br,cr,dr) + hr[0];\n\t                } else if (i<32) {\n\t\t            t +=  f4(br,cr,dr) + hr[1];\n\t                } else if (i<48) {\n\t\t            t +=  f3(br,cr,dr) + hr[2];\n\t                } else if (i<64) {\n\t\t            t +=  f2(br,cr,dr) + hr[3];\n\t                } else {// if (i<80) {\n\t\t            t +=  f1(br,cr,dr) + hr[4];\n\t                }\n\t                t = t|0;\n\t                t =  rotl(t,sr[i]) ;\n\t                t = (t+er)|0;\n\t                ar = er;\n\t                er = dr;\n\t                dr = rotl(cr, 10);\n\t                cr = br;\n\t                br = t;\n\t            }\n\t            // Intermediate hash value\n\t            t    = (H[1] + cl + dr)|0;\n\t            H[1] = (H[2] + dl + er)|0;\n\t            H[2] = (H[3] + el + ar)|0;\n\t            H[3] = (H[4] + al + br)|0;\n\t            H[4] = (H[0] + bl + cr)|0;\n\t            H[0] =  t;\n\t        },\n\n\t        _doFinalize: function () {\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\n\t            var nBitsTotal = this._nDataBytes * 8;\n\t            var nBitsLeft = data.sigBytes * 8;\n\n\t            // Add padding\n\t            dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = (\n\t                (((nBitsTotal << 8)  | (nBitsTotal >>> 24)) & 0x00ff00ff) |\n\t                (((nBitsTotal << 24) | (nBitsTotal >>> 8))  & 0xff00ff00)\n\t            );\n\t            data.sigBytes = (dataWords.length + 1) * 4;\n\n\t            // Hash final blocks\n\t            this._process();\n\n\t            // Shortcuts\n\t            var hash = this._hash;\n\t            var H = hash.words;\n\n\t            // Swap endian\n\t            for (var i = 0; i < 5; i++) {\n\t                // Shortcut\n\t                var H_i = H[i];\n\n\t                // Swap\n\t                H[i] = (((H_i << 8)  | (H_i >>> 24)) & 0x00ff00ff) |\n\t                       (((H_i << 24) | (H_i >>> 8))  & 0xff00ff00);\n\t            }\n\n\t            // Return final computed hash\n\t            return hash;\n\t        },\n\n\t        clone: function () {\n\t            var clone = Hasher.clone.call(this);\n\t            clone._hash = this._hash.clone();\n\n\t            return clone;\n\t        }\n\t    });\n\n\n\t    function f1(x, y, z) {\n\t        return ((x) ^ (y) ^ (z));\n\n\t    }\n\n\t    function f2(x, y, z) {\n\t        return (((x)&(y)) | ((~x)&(z)));\n\t    }\n\n\t    function f3(x, y, z) {\n\t        return (((x) | (~(y))) ^ (z));\n\t    }\n\n\t    function f4(x, y, z) {\n\t        return (((x) & (z)) | ((y)&(~(z))));\n\t    }\n\n\t    function f5(x, y, z) {\n\t        return ((x) ^ ((y) |(~(z))));\n\n\t    }\n\n\t    function rotl(x,n) {\n\t        return (x<<n) | (x>>>(32-n));\n\t    }\n\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.RIPEMD160('message');\n\t     *     var hash = CryptoJS.RIPEMD160(wordArray);\n\t     */\n\t    C.RIPEMD160 = Hasher._createHelper(RIPEMD160);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacRIPEMD160(message, key);\n\t     */\n\t    C.HmacRIPEMD160 = Hasher._createHmacHelper(RIPEMD160);\n\t}(Math));\n\n\n\treturn CryptoJS.RIPEMD160;\n\n}));",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var C_enc = C.enc;\n\n\t    /**\n\t     * Base64 encoding strategy.\n\t     */\n\t    var Base64 = C_enc.Base64 = {\n\t        /**\n\t         * Converts a word array to a Base64 string.\n\t         *\n\t         * @param {WordArray} wordArray The word array.\n\t         *\n\t         * @return {string} The Base64 string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var base64String = CryptoJS.enc.Base64.stringify(wordArray);\n\t         */\n\t        stringify: function (wordArray) {\n\t            // Shortcuts\n\t            var words = wordArray.words;\n\t            var sigBytes = wordArray.sigBytes;\n\t            var map = this._map;\n\n\t            // Clamp excess bits\n\t            wordArray.clamp();\n\n\t            // Convert\n\t            var base64Chars = [];\n\t            for (var i = 0; i < sigBytes; i += 3) {\n\t                var byte1 = (words[i >>> 2]       >>> (24 - (i % 4) * 8))       & 0xff;\n\t                var byte2 = (words[(i + 1) >>> 2] >>> (24 - ((i + 1) % 4) * 8)) & 0xff;\n\t                var byte3 = (words[(i + 2) >>> 2] >>> (24 - ((i + 2) % 4) * 8)) & 0xff;\n\n\t                var triplet = (byte1 << 16) | (byte2 << 8) | byte3;\n\n\t                for (var j = 0; (j < 4) && (i + j * 0.75 < sigBytes); j++) {\n\t                    base64Chars.push(map.charAt((triplet >>> (6 * (3 - j))) & 0x3f));\n\t                }\n\t            }\n\n\t            // Add padding\n\t            var paddingChar = map.charAt(64);\n\t            if (paddingChar) {\n\t                while (base64Chars.length % 4) {\n\t                    base64Chars.push(paddingChar);\n\t                }\n\t            }\n\n\t            return base64Chars.join('');\n\t        },\n\n\t        /**\n\t         * Converts a Base64 string to a word array.\n\t         *\n\t         * @param {string} base64Str The Base64 string.\n\t         *\n\t         * @return {WordArray} The word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.enc.Base64.parse(base64String);\n\t         */\n\t        parse: function (base64Str) {\n\t            // Shortcuts\n\t            var base64StrLength = base64Str.length;\n\t            var map = this._map;\n\t            var reverseMap = this._reverseMap;\n\n\t            if (!reverseMap) {\n\t                    reverseMap = this._reverseMap = [];\n\t                    for (var j = 0; j < map.length; j++) {\n\t                        reverseMap[map.charCodeAt(j)] = j;\n\t                    }\n\t            }\n\n\t            // Ignore padding\n\t            var paddingChar = map.charAt(64);\n\t            if (paddingChar) {\n\t                var paddingIndex = base64Str.indexOf(paddingChar);\n\t                if (paddingIndex !== -1) {\n\t                    base64StrLength = paddingIndex;\n\t                }\n\t            }\n\n\t            // Convert\n\t            return parseLoop(base64Str, base64StrLength, reverseMap);\n\n\t        },\n\n\t        _map: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='\n\t    };\n\n\t    function parseLoop(base64Str, base64StrLength, reverseMap) {\n\t      var words = [];\n\t      var nBytes = 0;\n\t      for (var i = 0; i < base64StrLength; i++) {\n\t          if (i % 4) {\n\t              var bits1 = reverseMap[base64Str.charCodeAt(i - 1)] << ((i % 4) * 2);\n\t              var bits2 = reverseMap[base64Str.charCodeAt(i)] >>> (6 - (i % 4) * 2);\n\t              var bitsCombined = bits1 | bits2;\n\t              words[nBytes >>> 2] |= bitsCombined << (24 - (nBytes % 4) * 8);\n\t              nBytes++;\n\t          }\n\t      }\n\t      return WordArray.create(words, nBytes);\n\t    }\n\t}());\n\n\n\treturn CryptoJS.enc.Base64;\n\n}));","module.exports = require('./browser/algorithms.json')\n","'use strict'\n\n// limit of Crypto.getRandomValues()\n// https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues\nvar MAX_BYTES = 65536\n\n// Node supports requesting up to this number of bytes\n// https://github.com/nodejs/node/blob/master/lib/internal/crypto/random.js#L48\nvar MAX_UINT32 = 4294967295\n\nfunction oldBrowser () {\n  throw new Error('Secure random number generation is not supported by this browser.\\nUse Chrome, Firefox or Internet Explorer 11')\n}\n\nvar Buffer = require('safe-buffer').Buffer\nvar crypto = global.crypto || global.msCrypto\n\nif (crypto && crypto.getRandomValues) {\n  module.exports = randomBytes\n} else {\n  module.exports = oldBrowser\n}\n\nfunction randomBytes (size, cb) {\n  // phantomjs needs to throw\n  if (size > MAX_UINT32) throw new RangeError('requested too many random bytes')\n\n  var bytes = Buffer.allocUnsafe(size)\n\n  if (size > 0) {  // getRandomValues fails on IE if size == 0\n    if (size > MAX_BYTES) { // this is the max bytes crypto.getRandomValues\n      // can do at once see https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues\n      for (var generated = 0; generated < size; generated += MAX_BYTES) {\n        // buffer.slice automatically checks if the end is past the end of\n        // the buffer so we don't have to here\n        crypto.getRandomValues(bytes.slice(generated, generated + MAX_BYTES))\n      }\n    } else {\n      crypto.getRandomValues(bytes)\n    }\n  }\n\n  if (typeof cb === 'function') {\n    return process.nextTick(function () {\n      cb(null, bytes)\n    })\n  }\n\n  return bytes\n}\n","export * from \"./enums.js\";\nexport * from \"./modifiers/index.js\"; // eslint-disable-next-line import/no-unused-modules\n\nexport { popperGenerator, detectOverflow, createPopper as createPopperBase } from \"./createPopper.js\"; // eslint-disable-next-line import/no-unused-modules\n\nexport { createPopper } from \"./popper.js\"; // eslint-disable-next-line import/no-unused-modules\n\nexport { createPopper as createPopperLite } from \"./popper-lite.js\";","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar isRegExp = require('../internals/is-regexp');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar speciesConstructor = require('../internals/species-constructor');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar toLength = require('../internals/to-length');\nvar callRegExpExec = require('../internals/regexp-exec-abstract');\nvar regexpExec = require('../internals/regexp-exec');\nvar fails = require('../internals/fails');\n\nvar arrayPush = [].push;\nvar min = Math.min;\nvar MAX_UINT32 = 0xFFFFFFFF;\n\n// babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError\nvar SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });\n\n// @@split logic\nfixRegExpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {\n  var internalSplit;\n  if (\n    'abbc'.split(/(b)*/)[1] == 'c' ||\n    // eslint-disable-next-line regexp/no-empty-group -- required for testing\n    'test'.split(/(?:)/, -1).length != 4 ||\n    'ab'.split(/(?:ab)*/).length != 2 ||\n    '.'.split(/(.?)(.?)/).length != 4 ||\n    // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing\n    '.'.split(/()()/).length > 1 ||\n    ''.split(/.?/).length\n  ) {\n    // based on es5-shim implementation, need to rework it\n    internalSplit = function (separator, limit) {\n      var string = String(requireObjectCoercible(this));\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (separator === undefined) return [string];\n      // If `separator` is not a regex, use native split\n      if (!isRegExp(separator)) {\n        return nativeSplit.call(string, separator, lim);\n      }\n      var output = [];\n      var flags = (separator.ignoreCase ? 'i' : '') +\n                  (separator.multiline ? 'm' : '') +\n                  (separator.unicode ? 'u' : '') +\n                  (separator.sticky ? 'y' : '');\n      var lastLastIndex = 0;\n      // Make `global` and avoid `lastIndex` issues by working with a copy\n      var separatorCopy = new RegExp(separator.source, flags + 'g');\n      var match, lastIndex, lastLength;\n      while (match = regexpExec.call(separatorCopy, string)) {\n        lastIndex = separatorCopy.lastIndex;\n        if (lastIndex > lastLastIndex) {\n          output.push(string.slice(lastLastIndex, match.index));\n          if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));\n          lastLength = match[0].length;\n          lastLastIndex = lastIndex;\n          if (output.length >= lim) break;\n        }\n        if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop\n      }\n      if (lastLastIndex === string.length) {\n        if (lastLength || !separatorCopy.test('')) output.push('');\n      } else output.push(string.slice(lastLastIndex));\n      return output.length > lim ? output.slice(0, lim) : output;\n    };\n  // Chakra, V8\n  } else if ('0'.split(undefined, 0).length) {\n    internalSplit = function (separator, limit) {\n      return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);\n    };\n  } else internalSplit = nativeSplit;\n\n  return [\n    // `String.prototype.split` method\n    // https://tc39.es/ecma262/#sec-string.prototype.split\n    function split(separator, limit) {\n      var O = requireObjectCoercible(this);\n      var splitter = separator == undefined ? undefined : separator[SPLIT];\n      return splitter !== undefined\n        ? splitter.call(separator, O, limit)\n        : internalSplit.call(String(O), separator, limit);\n    },\n    // `RegExp.prototype[@@split]` method\n    // https://tc39.es/ecma262/#sec-regexp.prototype-@@split\n    //\n    // NOTE: This cannot be properly polyfilled in engines that don't support\n    // the 'y' flag.\n    function (regexp, limit) {\n      var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n      var C = speciesConstructor(rx, RegExp);\n\n      var unicodeMatching = rx.unicode;\n      var flags = (rx.ignoreCase ? 'i' : '') +\n                  (rx.multiline ? 'm' : '') +\n                  (rx.unicode ? 'u' : '') +\n                  (SUPPORTS_Y ? 'y' : 'g');\n\n      // ^(? + rx + ) is needed, in combination with some S slicing, to\n      // simulate the 'y' flag.\n      var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);\n      var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;\n      if (lim === 0) return [];\n      if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];\n      var p = 0;\n      var q = 0;\n      var A = [];\n      while (q < S.length) {\n        splitter.lastIndex = SUPPORTS_Y ? q : 0;\n        var z = callRegExpExec(splitter, SUPPORTS_Y ? S : S.slice(q));\n        var e;\n        if (\n          z === null ||\n          (e = min(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p\n        ) {\n          q = advanceStringIndex(S, q, unicodeMatching);\n        } else {\n          A.push(S.slice(p, q));\n          if (A.length === lim) return A;\n          for (var i = 1; i <= z.length - 1; i++) {\n            A.push(z[i]);\n            if (A.length === lim) return A;\n          }\n          q = p = e;\n        }\n      }\n      A.push(S.slice(p));\n      return A;\n    }\n  ];\n}, !SUPPORTS_Y);\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar scrollSetting = {\n  \"\": true,\n  \"up\": true\n};\n\nfunction findScrollSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var scroll = scrollSetting[value.toLowerCase()];\n  return scroll ? value.toLowerCase() : false;\n}\n\nfunction isValidPercentValue(value) {\n  return typeof value === \"number\" && (value >= 0 && value <= 100);\n}\n\n// VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\nfunction VTTRegion() {\n  var _width = 100;\n  var _lines = 3;\n  var _regionAnchorX = 0;\n  var _regionAnchorY = 100;\n  var _viewportAnchorX = 0;\n  var _viewportAnchorY = 100;\n  var _scroll = \"\";\n\n  Object.defineProperties(this, {\n    \"width\": {\n      enumerable: true,\n      get: function() {\n        return _width;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"Width must be between 0 and 100.\");\n        }\n        _width = value;\n      }\n    },\n    \"lines\": {\n      enumerable: true,\n      get: function() {\n        return _lines;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Lines must be set to a number.\");\n        }\n        _lines = value;\n      }\n    },\n    \"regionAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n        }\n        _regionAnchorY = value;\n      }\n    },\n    \"regionAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorX;\n      },\n      set: function(value) {\n        if(!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n        }\n        _regionAnchorX = value;\n      }\n    },\n    \"viewportAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n        }\n        _viewportAnchorY = value;\n      }\n    },\n    \"viewportAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorX;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n        }\n        _viewportAnchorX = value;\n      }\n    },\n    \"scroll\": {\n      enumerable: true,\n      get: function() {\n        return _scroll;\n      },\n      set: function(value) {\n        var setting = findScrollSetting(value);\n        // Have to check for false as an empty string is a legal value.\n        if (setting === false) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _scroll = setting;\n      }\n    }\n  });\n}\n\nmodule.exports = VTTRegion;\n","// `SameValue` abstract operation\n// https://tc39.es/ecma262/#sec-samevalue\n// eslint-disable-next-line es/no-object-is -- safe\nmodule.exports = Object.is || function is(x, y) {\n  // eslint-disable-next-line no-self-compare -- NaN check\n  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;\n};\n","/**\n * @license\n * Video.js 6.13.0 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/master/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/master/LICENSE>\n */\n\nfunction _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }\n\nvar window = _interopDefault(require('global/window'));\nvar document = _interopDefault(require('global/document'));\nvar tsml = _interopDefault(require('tsml'));\nvar safeParseTuple = _interopDefault(require('safe-json-parse/tuple'));\nvar xhr = _interopDefault(require('xhr'));\nvar vtt = _interopDefault(require('videojs-vtt.js'));\n\nvar version = \"6.13.0\";\n\n/**\n * @file browser.js\n * @module browser\n */\nvar USER_AGENT = window.navigator && window.navigator.userAgent || '';\nvar webkitVersionMap = /AppleWebKit\\/([\\d.]+)/i.exec(USER_AGENT);\nvar appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;\n\n/*\n * Device is an iPhone\n *\n * @type {Boolean}\n * @constant\n * @private\n */\nvar IS_IPAD = /iPad/i.test(USER_AGENT);\n\n// The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n// to identify iPhones, we need to exclude iPads.\n// http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\nvar IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\nvar IS_IPOD = /iPod/i.test(USER_AGENT);\nvar IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n\nvar IOS_VERSION = function () {\n  var match = USER_AGENT.match(/OS (\\d+)_/i);\n\n  if (match && match[1]) {\n    return match[1];\n  }\n  return null;\n}();\n\nvar IS_ANDROID = /Android/i.test(USER_AGENT);\nvar ANDROID_VERSION = function () {\n  // This matches Android Major.Minor.Patch versions\n  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n  var match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n\n  if (!match) {\n    return null;\n  }\n\n  var major = match[1] && parseFloat(match[1]);\n  var minor = match[2] && parseFloat(match[2]);\n\n  if (major && minor) {\n    return parseFloat(match[1] + '.' + match[2]);\n  } else if (major) {\n    return major;\n  }\n  return null;\n}();\n\n// Old Android is defined as Version older than 2.3, and requiring a webkit version of the android browser\nvar IS_OLD_ANDROID = IS_ANDROID && /webkit/i.test(USER_AGENT) && ANDROID_VERSION < 2.3;\nvar IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;\n\nvar IS_FIREFOX = /Firefox/i.test(USER_AGENT);\nvar IS_EDGE = /Edge/i.test(USER_AGENT);\nvar IS_CHROME = !IS_EDGE && (/Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT));\nvar CHROME_VERSION = function () {\n  var match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n\n  if (match && match[2]) {\n    return parseFloat(match[2]);\n  }\n  return null;\n}();\nvar IS_IE8 = /MSIE\\s8\\.0/.test(USER_AGENT);\nvar IE_VERSION = function () {\n  var result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n  var version = result && parseFloat(result[1]);\n\n  if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n    // IE 11 has a different user agent string than other IE versions\n    version = 11.0;\n  }\n\n  return version;\n}();\n\nvar IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\nvar IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n\nvar TOUCH_ENABLED = isReal() && ('ontouchstart' in window || window.navigator.maxTouchPoints || window.DocumentTouch && window.document instanceof window.DocumentTouch);\n\nvar BACKGROUND_SIZE_SUPPORTED = isReal() && 'backgroundSize' in window.document.createElement('video').style;\n\nvar browser = (Object.freeze || Object)({\n\tIS_IPAD: IS_IPAD,\n\tIS_IPHONE: IS_IPHONE,\n\tIS_IPOD: IS_IPOD,\n\tIS_IOS: IS_IOS,\n\tIOS_VERSION: IOS_VERSION,\n\tIS_ANDROID: IS_ANDROID,\n\tANDROID_VERSION: ANDROID_VERSION,\n\tIS_OLD_ANDROID: IS_OLD_ANDROID,\n\tIS_NATIVE_ANDROID: IS_NATIVE_ANDROID,\n\tIS_FIREFOX: IS_FIREFOX,\n\tIS_EDGE: IS_EDGE,\n\tIS_CHROME: IS_CHROME,\n\tCHROME_VERSION: CHROME_VERSION,\n\tIS_IE8: IS_IE8,\n\tIE_VERSION: IE_VERSION,\n\tIS_SAFARI: IS_SAFARI,\n\tIS_ANY_SAFARI: IS_ANY_SAFARI,\n\tTOUCH_ENABLED: TOUCH_ENABLED,\n\tBACKGROUND_SIZE_SUPPORTED: BACKGROUND_SIZE_SUPPORTED\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) {\n  return typeof obj;\n} : function (obj) {\n  return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar classCallCheck = function (instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\n\n\n\n\n\n\n\n\n\n\n\nvar inherits = function (subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar possibleConstructorReturn = function (self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar taggedTemplateLiteralLoose = function (strings, raw) {\n  strings.raw = raw;\n  return strings;\n};\n\n/**\n * @file obj.js\n * @module obj\n */\n\n/**\n * @callback obj:EachCallback\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n */\n\n/**\n * @callback obj:ReduceCallback\n *\n * @param {Mixed} accum\n *        The value that is accumulating over the reduce loop.\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n *\n * @return {Mixed}\n *         The new accumulated value.\n */\nvar toString = Object.prototype.toString;\n\n/**\n * Get the keys of an Object\n *\n * @param {Object}\n *        The Object to get the keys from\n *\n * @return {string[]}\n *         An array of the keys from the object. Returns an empty array if the\n *         object passed in was invalid or had no keys.\n *\n * @private\n */\nvar keys = function keys(object) {\n  return isObject(object) ? Object.keys(object) : [];\n};\n\n/**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n *        The object to iterate over\n *\n * @param {obj:EachCallback} fn\n *        The callback function which is called for each key in the object.\n */\nfunction each(object, fn) {\n  keys(object).forEach(function (key) {\n    return fn(object[key], key);\n  });\n}\n\n/**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n *        The Object that you want to reduce.\n *\n * @param {Function} fn\n *         A callback function which is called for each key in the object. It\n *         receives the accumulated value and the per-iteration value and key\n *         as arguments.\n *\n * @param {Mixed} [initial = 0]\n *        Starting value\n *\n * @return {Mixed}\n *         The final accumulated value.\n */\nfunction reduce(object, fn) {\n  var initial = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;\n\n  return keys(object).reduce(function (accum, key) {\n    return fn(accum, object[key], key);\n  }, initial);\n}\n\n/**\n * Object.assign-style object shallow merge/extend.\n *\n * @param  {Object} target\n * @param  {Object} ...sources\n * @return {Object}\n */\nfunction assign(target) {\n  for (var _len = arguments.length, sources = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n    sources[_key - 1] = arguments[_key];\n  }\n\n  if (Object.assign) {\n    return Object.assign.apply(Object, [target].concat(sources));\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      target[key] = value;\n    });\n  });\n\n  return target;\n}\n\n/**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param  {Object} value\n * @return {Boolean}\n */\nfunction isObject(value) {\n  return !!value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object';\n}\n\n/**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param  {Object} value\n * @return {Boolean}\n */\nfunction isPlain(value) {\n  return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;\n}\n\n/**\n * @file create-logger.js\n * @module create-logger\n */\n// This is the private tracking variable for the logging history.\nvar history = [];\n\n/**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param  {string} type\n *         The name of the console method to use.\n *\n * @param  {Array} args\n *         The arguments to be passed to the matching console method.\n */\nvar LogByTypeFactory = function LogByTypeFactory(name, log) {\n  return function (type, level, args, stringify) {\n    var lvl = log.levels[level];\n    var lvlRegExp = new RegExp('^(' + lvl + ')$');\n\n    if (type !== 'log') {\n\n      // Add the type to the front of the message when it's not \"log\".\n      args.unshift(type.toUpperCase() + ':');\n    }\n\n    // Add console prefix after adding to history.\n    args.unshift(name + ':');\n\n    // Add a clone of the args at this point to history.\n    if (history) {\n      history.push([].concat(args));\n    }\n\n    // If there's no console then don't try to output messages, but they will\n    // still be stored in history.\n    if (!window.console) {\n      return;\n    }\n\n    // Was setting these once outside of this function, but containing them\n    // in the function makes it easier to test cases where console doesn't exist\n    // when the module is executed.\n    var fn = window.console[type];\n\n    if (!fn && type === 'debug') {\n      // Certain browsers don't have support for console.debug. For those, we\n      // should default to the closest comparable log.\n      fn = window.console.info || window.console.log;\n    }\n\n    // Bail out if there's no console or if this type is not allowed by the\n    // current logging level.\n    if (!fn || !lvl || !lvlRegExp.test(type)) {\n      return;\n    }\n\n    // IEs previous to 11 log objects uselessly as \"[object Object]\"; so, JSONify\n    // objects and arrays for those less-capable browsers.\n    if (stringify) {\n      args = args.map(function (a) {\n        if (isObject(a) || Array.isArray(a)) {\n          try {\n            return JSON.stringify(a);\n          } catch (x) {\n            return String(a);\n          }\n        }\n\n        // Cast to string before joining, so we get null and undefined explicitly\n        // included in output (as we would in a modern console).\n        return String(a);\n      }).join(' ');\n    }\n\n    // Old IE versions do not allow .apply() for console methods (they are\n    // reported as objects rather than functions).\n    if (!fn.apply) {\n      fn(args);\n    } else {\n      fn[Array.isArray(args) ? 'apply' : 'call'](window.console, args);\n    }\n  };\n};\n\nfunction createLogger$1(name) {\n  // This is the private tracking variable for logging level.\n  var level = 'info';\n\n  // the curried logByType bound to the specific log and history\n  var logByType = void 0;\n\n  /**\n   * Logs plain debug messages. Similar to `console.log`.\n   *\n   * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n   * of our JSDoc template, we cannot properly document this as both a function\n   * and a namespace, so its function signature is documented here.\n   *\n   * #### Arguments\n   * ##### *args\n   * Mixed[]\n   *\n   * Any combination of values that could be passed to `console.log()`.\n   *\n   * #### Return Value\n   *\n   * `undefined`\n   *\n   * @namespace\n   * @param    {Mixed[]} args\n   *           One or more messages or objects that should be logged.\n   */\n  var log = function log() {\n    var stringify = log.stringify || IE_VERSION && IE_VERSION < 11;\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    logByType('log', level, args, stringify);\n  };\n\n  // This is the logByType helper that the logging methods below use\n  logByType = LogByTypeFactory(name, log);\n\n  /**\n   * Create a new sublogger which chains the old name to the new name.\n   *\n   * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n   * ```js\n   *  mylogger('foo');\n   *  // > VIDEOJS: player: foo\n   * ```\n   *\n   * @param {string} name\n   *        The name to add call the new logger\n   * @return {Object}\n   */\n  log.createLogger = function (subname) {\n    return createLogger$1(name + ': ' + subname);\n  };\n\n  /**\n   * Enumeration of available logging levels, where the keys are the level names\n   * and the values are `|`-separated strings containing logging methods allowed\n   * in that logging level. These strings are used to create a regular expression\n   * matching the function name being called.\n   *\n   * Levels provided by Video.js are:\n   *\n   * - `off`: Matches no calls. Any value that can be cast to `false` will have\n   *   this effect. The most restrictive.\n   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n   *   `log.warn`, and `log.error`).\n   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n   * - `warn`: Matches `log.warn` and `log.error` calls.\n   * - `error`: Matches only `log.error` calls.\n   *\n   * @type {Object}\n   */\n  log.levels = {\n    all: 'debug|log|warn|error',\n    off: '',\n    debug: 'debug|log|warn|error',\n    info: 'log|warn|error',\n    warn: 'warn|error',\n    error: 'error',\n    DEFAULT: level\n  };\n\n  /**\n   * Get or set the current logging level.\n   *\n   * If a string matching a key from {@link module:log.levels} is provided, acts\n   * as a setter.\n   *\n   * @param  {string} [lvl]\n   *         Pass a valid level to set a new logging level.\n   *\n   * @return {string}\n   *         The current logging level.\n   */\n  log.level = function (lvl) {\n    if (typeof lvl === 'string') {\n      if (!log.levels.hasOwnProperty(lvl)) {\n        throw new Error('\"' + lvl + '\" in not a valid log level');\n      }\n      level = lvl;\n    }\n    return level;\n  };\n\n  /**\n   * Returns an array containing everything that has been logged to the history.\n   *\n   * This array is a shallow clone of the internal history record. However, its\n   * contents are _not_ cloned; so, mutating objects inside this array will\n   * mutate them in history.\n   *\n   * @return {Array}\n   */\n  log.history = function () {\n    return history ? [].concat(history) : [];\n  };\n\n  /**\n   * Allows you to filter the history by the given logger name\n   *\n   * @param {string} fname\n   *        The name to filter by\n   *\n   * @return {Array}\n   *         The filtered list to return\n   */\n  log.history.filter = function (fname) {\n    return (history || []).filter(function (historyItem) {\n      // if the first item in each historyItem includes `fname`, then it's a match\n      return new RegExp('.*' + fname + '.*').test(historyItem[0]);\n    });\n  };\n\n  /**\n   * Clears the internal history tracking, but does not prevent further history\n   * tracking.\n   */\n  log.history.clear = function () {\n    if (history) {\n      history.length = 0;\n    }\n  };\n\n  /**\n   * Disable history tracking if it is currently enabled.\n   */\n  log.history.disable = function () {\n    if (history !== null) {\n      history.length = 0;\n      history = null;\n    }\n  };\n\n  /**\n   * Enable history tracking if it is currently disabled.\n   */\n  log.history.enable = function () {\n    if (history === null) {\n      history = [];\n    }\n  };\n\n  /**\n   * Logs error messages. Similar to `console.error`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as an error\n   */\n  log.error = function () {\n    for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    return logByType('error', level, args);\n  };\n\n  /**\n   * Logs warning messages. Similar to `console.warn`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as a warning.\n   */\n  log.warn = function () {\n    for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    return logByType('warn', level, args);\n  };\n\n  /**\n   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n   * log if `console.debug` is not available\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as debug.\n   */\n  log.debug = function () {\n    for (var _len4 = arguments.length, args = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    return logByType('debug', level, args);\n  };\n\n  return log;\n}\n\n/**\n * @file log.js\n * @module log\n */\nvar log = createLogger$1('VIDEOJS');\nvar createLogger = log.createLogger;\n\n/**\n * @file computed-style.js\n * @module computed-style\n */\n/**\n * A safe getComputedStyle with an IE8 fallback.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a null-check to\n * make sure  that the player doesn't break in these cases.\n *\n * @param {Element} el\n *        The element you want the computed style of\n *\n * @param {string} prop\n *        The property name you want\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n *\n * @static\n * @const\n */\nfunction computedStyle(el, prop) {\n  if (!el || !prop) {\n    return '';\n  }\n\n  if (typeof window.getComputedStyle === 'function') {\n    var cs = window.getComputedStyle(el);\n\n    return cs ? cs[prop] : '';\n  }\n\n  return el.currentStyle[prop] || '';\n}\n\nvar _templateObject = taggedTemplateLiteralLoose(['Setting attributes in the second argument of createEl()\\n                has been deprecated. Use the third argument instead.\\n                createEl(type, properties, attributes). Attempting to set ', ' to ', '.'], ['Setting attributes in the second argument of createEl()\\n                has been deprecated. Use the third argument instead.\\n                createEl(type, properties, attributes). Attempting to set ', ' to ', '.']);\n\n/**\n * @file dom.js\n * @module dom\n */\n/**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @param {string} str\n *        The string to check\n *\n * @return {boolean}\n *         - True if the string is non-blank\n *         - False otherwise\n *\n */\nfunction isNonBlankString(str) {\n  return typeof str === 'string' && /\\S/.test(str);\n}\n\n/**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @param {string} str\n *         The string to check for whitespace.\n *\n * @throws {Error}\n *         Throws an error if there is whitespace in the string.\n *\n */\nfunction throwIfWhitespace(str) {\n  if (/\\s/.test(str)) {\n    throw new Error('class has illegal whitespace characters');\n  }\n}\n\n/**\n * Produce a regular expression for matching a className within an elements className.\n *\n * @param {string} className\n *         The className to generate the RegExp for.\n *\n * @return {RegExp}\n *         The RegExp that will check for a specific `className` in an elements\n *         className.\n */\nfunction classRegExp(className) {\n  return new RegExp('(^|\\\\s)' + className + '($|\\\\s)');\n}\n\n/**\n * Whether the current DOM interface appears to be real.\n *\n * @return {Boolean}\n */\nfunction isReal() {\n  return (\n\n    // Both document and window will never be undefined thanks to `global`.\n    document === window.document &&\n\n    // In IE < 9, DOM methods return \"object\" as their type, so all we can\n    // confidently check is that it exists.\n    typeof document.createElement !== 'undefined'\n  );\n}\n\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param {Mixed} value\n *        The thing to check\n *\n * @return {boolean}\n *         - True if it is a DOM element\n *         - False otherwise\n */\nfunction isEl(value) {\n  return isObject(value) && value.nodeType === 1;\n}\n\n/**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n *\n */\nfunction isInFrame() {\n\n  // We need a try/catch here because Safari will throw errors when attempting\n  // to get either `parent` or `self`\n  try {\n    return window.parent !== window.self;\n  } catch (x) {\n    return true;\n  }\n}\n\n/**\n * Creates functions to query the DOM using a given method.\n *\n * @param {string} method\n *         The method to create the query with.\n *\n * @return {Function}\n *         The query method\n */\nfunction createQuerier(method) {\n  return function (selector, context) {\n    if (!isNonBlankString(selector)) {\n      return document[method](null);\n    }\n    if (isNonBlankString(context)) {\n      context = document.querySelector(context);\n    }\n\n    var ctx = isEl(context) ? context : document;\n\n    return ctx[method] && ctx[method](selector);\n  };\n}\n\n/**\n * Creates an element and applies properties.\n *\n * @param {string} [tagName='div']\n *         Name of tag to be created.\n *\n * @param {Object} [properties={}]\n *         Element properties to be applied.\n *\n * @param {Object} [attributes={}]\n *         Element attributes to be applied.\n *\n * @param {String|Element|TextNode|Array|Function} [content]\n *         Contents for the element (see: {@link dom:normalizeContent})\n *\n * @return {Element}\n *         The element that was created.\n */\nfunction createEl() {\n  var tagName = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'div';\n  var properties = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n  var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n  var content = arguments[3];\n\n  var el = document.createElement(tagName);\n\n  Object.getOwnPropertyNames(properties).forEach(function (propName) {\n    var val = properties[propName];\n\n    // See #2176\n    // We originally were accepting both properties and attributes in the\n    // same object, but that doesn't work so well.\n    if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {\n      log.warn(tsml(_templateObject, propName, val));\n      el.setAttribute(propName, val);\n\n      // Handle textContent since it's not supported everywhere and we have a\n      // method for it.\n    } else if (propName === 'textContent') {\n      textContent(el, val);\n    } else {\n      el[propName] = val;\n    }\n  });\n\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    el.setAttribute(attrName, attributes[attrName]);\n  });\n\n  if (content) {\n    appendContent(el, content);\n  }\n\n  return el;\n}\n\n/**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param {Element} el\n *        The element to add text content into\n *\n * @param {string} text\n *        The text content to add.\n *\n * @return {Element}\n *         The element with added text content.\n */\nfunction textContent(el, text) {\n  if (typeof el.textContent === 'undefined') {\n    el.innerText = text;\n  } else {\n    el.textContent = text;\n  }\n  return el;\n}\n\n/**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n *        Element to insert\n *\n * @param {Element} parent\n *        Element to insert child into\n */\nfunction prependTo(child, parent) {\n  if (parent.firstChild) {\n    parent.insertBefore(child, parent.firstChild);\n  } else {\n    parent.appendChild(child);\n  }\n}\n\n/**\n * Check if an element has a CSS class\n *\n * @param {Element} element\n *        Element to check\n *\n * @param {string} classToCheck\n *        Class name to check for\n *\n * @return {boolean}\n *         - True if the element had the class\n *         - False otherwise.\n *\n * @throws {Error}\n *         Throws an error if `classToCheck` has white space.\n */\nfunction hasClass(element, classToCheck) {\n  throwIfWhitespace(classToCheck);\n  if (element.classList) {\n    return element.classList.contains(classToCheck);\n  }\n  return classRegExp(classToCheck).test(element.className);\n}\n\n/**\n * Add a CSS class name to an element\n *\n * @param {Element} element\n *        Element to add class name to.\n *\n * @param {string} classToAdd\n *        Class name to add.\n *\n * @return {Element}\n *         The dom element with the added class name.\n */\nfunction addClass(element, classToAdd) {\n  if (element.classList) {\n    element.classList.add(classToAdd);\n\n    // Don't need to `throwIfWhitespace` here because `hasElClass` will do it\n    // in the case of classList not being supported.\n  } else if (!hasClass(element, classToAdd)) {\n    element.className = (element.className + ' ' + classToAdd).trim();\n  }\n\n  return element;\n}\n\n/**\n * Remove a CSS class name from an element\n *\n * @param {Element} element\n *        Element to remove a class name from.\n *\n * @param {string} classToRemove\n *        Class name to remove\n *\n * @return {Element}\n *         The dom element with class name removed.\n */\nfunction removeClass(element, classToRemove) {\n  if (element.classList) {\n    element.classList.remove(classToRemove);\n  } else {\n    throwIfWhitespace(classToRemove);\n    element.className = element.className.split(/\\s+/).filter(function (c) {\n      return c !== classToRemove;\n    }).join(' ');\n  }\n\n  return element;\n}\n\n/**\n * The callback definition for toggleElClass.\n *\n * @callback Dom~PredicateCallback\n * @param {Element} element\n *        The DOM element of the Component.\n *\n * @param {string} classToToggle\n *        The `className` that wants to be toggled\n *\n * @return {boolean|undefined}\n *         - If true the `classToToggle` will get added to `element`.\n *         - If false the `classToToggle` will get removed from `element`.\n *         - If undefined this callback will be ignored\n */\n\n/**\n * Adds or removes a CSS class name on an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param {Element} element\n *        The element to toggle a class name on.\n *\n * @param {string} classToToggle\n *        The class that should be toggled\n *\n * @param {boolean|PredicateCallback} [predicate]\n *        See the return value for {@link Dom~PredicateCallback}\n *\n * @return {Element}\n *         The element with a class that has been toggled.\n */\nfunction toggleClass(element, classToToggle, predicate) {\n\n  // This CANNOT use `classList` internally because IE does not support the\n  // second parameter to the `classList.toggle()` method! Which is fine because\n  // `classList` will be used by the add/remove functions.\n  var has = hasClass(element, classToToggle);\n\n  if (typeof predicate === 'function') {\n    predicate = predicate(element, classToToggle);\n  }\n\n  if (typeof predicate !== 'boolean') {\n    predicate = !has;\n  }\n\n  // If the necessary class operation matches the current state of the\n  // element, no action is required.\n  if (predicate === has) {\n    return;\n  }\n\n  if (predicate) {\n    addClass(element, classToToggle);\n  } else {\n    removeClass(element, classToToggle);\n  }\n\n  return element;\n}\n\n/**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n *        Element to add attributes to.\n *\n * @param {Object} [attributes]\n *        Attributes to be applied.\n */\nfunction setAttributes(el, attributes) {\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    var attrValue = attributes[attrName];\n\n    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n      el.removeAttribute(attrName);\n    } else {\n      el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n    }\n  });\n}\n\n/**\n * Get an element's attribute values, as defined on the HTML tag\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute (which shouldn't be used with HTML)\n * This will return true or false for boolean attributes.\n *\n * @param {Element} tag\n *        Element from which to get tag attributes.\n *\n * @return {Object}\n *         All attributes of the element.\n */\nfunction getAttributes(tag) {\n  var obj = {};\n\n  // known boolean attributes\n  // we can check for matching boolean properties, but older browsers\n  // won't know about HTML5 boolean attributes that we still read from\n  var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n\n  if (tag && tag.attributes && tag.attributes.length > 0) {\n    var attrs = tag.attributes;\n\n    for (var i = attrs.length - 1; i >= 0; i--) {\n      var attrName = attrs[i].name;\n      var attrVal = attrs[i].value;\n\n      // check for known booleans\n      // the matching element property will return a value for typeof\n      if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n        // the value of an included boolean attribute is typically an empty\n        // string ('') which would equal false if we just check for a false value.\n        // we also don't want support bad code like autoplay='false'\n        attrVal = attrVal !== null ? true : false;\n      }\n\n      obj[attrName] = attrVal;\n    }\n  }\n\n  return obj;\n}\n\n/**\n * Get the value of an element's attribute\n *\n * @param {Element} el\n *        A DOM element\n *\n * @param {string} attribute\n *        Attribute to get the value of\n *\n * @return {string}\n *         value of the attribute\n */\nfunction getAttribute(el, attribute) {\n  return el.getAttribute(attribute);\n}\n\n/**\n * Set the value of an element's attribute\n *\n * @param {Element} el\n *        A DOM element\n *\n * @param {string} attribute\n *        Attribute to set\n *\n * @param {string} value\n *        Value to set the attribute to\n */\nfunction setAttribute(el, attribute, value) {\n  el.setAttribute(attribute, value);\n}\n\n/**\n * Remove an element's attribute\n *\n * @param {Element} el\n *        A DOM element\n *\n * @param {string} attribute\n *        Attribute to remove\n */\nfunction removeAttribute(el, attribute) {\n  el.removeAttribute(attribute);\n}\n\n/**\n * Attempt to block the ability to select text while dragging controls\n */\nfunction blockTextSelection() {\n  document.body.focus();\n  document.onselectstart = function () {\n    return false;\n  };\n}\n\n/**\n * Turn off text selection blocking\n */\nfunction unblockTextSelection() {\n  document.onselectstart = function () {\n    return true;\n  };\n}\n\n/**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param  {Element} el\n *         Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n *         Always returns a plain\n */\nfunction getBoundingClientRect(el) {\n  if (el && el.getBoundingClientRect && el.parentNode) {\n    var rect = el.getBoundingClientRect();\n    var result = {};\n\n    ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {\n      if (rect[k] !== undefined) {\n        result[k] = rect[k];\n      }\n    });\n\n    if (!result.height) {\n      result.height = parseFloat(computedStyle(el, 'height'));\n    }\n\n    if (!result.width) {\n      result.width = parseFloat(computedStyle(el, 'width'));\n    }\n\n    return result;\n  }\n}\n\n/**\n * The postion of a DOM element on the page.\n *\n * @typedef {Object} module:dom~Position\n *\n * @property {number} left\n *           Pixels to the left\n *\n * @property {number} top\n *           Pixels on top\n */\n\n/**\n * Offset Left.\n * getBoundingClientRect technique from\n * John Resig\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param {Element} el\n *        Element from which to get offset\n *\n * @return {module:dom~Position}\n *         The position of the element that was passed in.\n */\nfunction findPosition(el) {\n  var box = void 0;\n\n  if (el.getBoundingClientRect && el.parentNode) {\n    box = el.getBoundingClientRect();\n  }\n\n  if (!box) {\n    return {\n      left: 0,\n      top: 0\n    };\n  }\n\n  var docEl = document.documentElement;\n  var body = document.body;\n\n  var clientLeft = docEl.clientLeft || body.clientLeft || 0;\n  var scrollLeft = window.pageXOffset || body.scrollLeft;\n  var left = box.left + scrollLeft - clientLeft;\n\n  var clientTop = docEl.clientTop || body.clientTop || 0;\n  var scrollTop = window.pageYOffset || body.scrollTop;\n  var top = box.top + scrollTop - clientTop;\n\n  // Android sometimes returns slightly off decimal values, so need to round\n  return {\n    left: Math.round(left),\n    top: Math.round(top)\n  };\n}\n\n/**\n * x and y coordinates for a dom element or mouse pointer\n *\n * @typedef {Object} Dom~Coordinates\n *\n * @property {number} x\n *           x coordinate in pixels\n *\n * @property {number} y\n *           y coordinate in pixels\n */\n\n/**\n * Get pointer position in element\n * Returns an object with x and y coordinates.\n * The base on the coordinates are the bottom left of the element.\n *\n * @param {Element} el\n *        Element on which to get the pointer position on\n *\n * @param {EventTarget~Event} event\n *        Event object\n *\n * @return {Dom~Coordinates}\n *         A Coordinates object corresponding to the mouse position.\n *\n */\nfunction getPointerPosition(el, event) {\n  var position = {};\n  var box = findPosition(el);\n  var boxW = el.offsetWidth;\n  var boxH = el.offsetHeight;\n\n  var boxY = box.top;\n  var boxX = box.left;\n  var pageY = event.pageY;\n  var pageX = event.pageX;\n\n  if (event.changedTouches) {\n    pageX = event.changedTouches[0].pageX;\n    pageY = event.changedTouches[0].pageY;\n  }\n\n  position.y = Math.max(0, Math.min(1, (boxY - pageY + boxH) / boxH));\n  position.x = Math.max(0, Math.min(1, (pageX - boxX) / boxW));\n\n  return position;\n}\n\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param {Mixed} value\n *        Check if this value is a text node.\n *\n * @return {boolean}\n *         - True if it is a text node\n *         - False otherwise\n */\nfunction isTextNode(value) {\n  return isObject(value) && value.nodeType === 3;\n}\n\n/**\n * Empties the contents of an element.\n *\n * @param {Element} el\n *        The element to empty children from\n *\n * @return {Element}\n *         The element with no children\n */\nfunction emptyEl(el) {\n  while (el.firstChild) {\n    el.removeChild(el.firstChild);\n  }\n  return el;\n}\n\n/**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but protects\n * from falling into the trap of simply writing to `innerHTML`, which is\n * an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {String|Element|TextNode|Array|Function} content\n *        - String: Normalized into a text node.\n *        - Element/TextNode: Passed through.\n *        - Array: A one-dimensional array of strings, elements, nodes, or functions\n *          (which return single strings, elements, or nodes).\n *        - Function: If the sole argument, is expected to produce a string, element,\n *          node, or array as defined above.\n *\n * @return {Array}\n *         All of the content that was passed in normalized.\n */\nfunction normalizeContent(content) {\n\n  // First, invoke content if it is a function. If it produces an array,\n  // that needs to happen before normalization.\n  if (typeof content === 'function') {\n    content = content();\n  }\n\n  // Next up, normalize to an array, so one or many items can be normalized,\n  // filtered, and returned.\n  return (Array.isArray(content) ? content : [content]).map(function (value) {\n\n    // First, invoke value if it is a function to produce a new value,\n    // which will be subsequently normalized to a Node of some kind.\n    if (typeof value === 'function') {\n      value = value();\n    }\n\n    if (isEl(value) || isTextNode(value)) {\n      return value;\n    }\n\n    if (typeof value === 'string' && /\\S/.test(value)) {\n      return document.createTextNode(value);\n    }\n  }).filter(function (value) {\n    return value;\n  });\n}\n\n/**\n * Normalizes and appends content to an element.\n *\n * @param {Element} el\n *        Element to append normalized content to.\n *\n *\n * @param {String|Element|TextNode|Array|Function} content\n *        See the `content` argument of {@link dom:normalizeContent}\n *\n * @return {Element}\n *         The element with appended normalized content.\n */\nfunction appendContent(el, content) {\n  normalizeContent(content).forEach(function (node) {\n    return el.appendChild(node);\n  });\n  return el;\n}\n\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n *        Element to insert normalized content into.\n *\n * @param {String|Element|TextNode|Array|Function} content\n *        See the `content` argument of {@link dom:normalizeContent}\n *\n * @return {Element}\n *         The element with inserted normalized content.\n *\n */\nfunction insertContent(el, content) {\n  return appendContent(emptyEl(el), content);\n}\n\n/**\n * Check if event was a single left click\n *\n * @param {EventTarget~Event} event\n *        Event object\n *\n * @return {boolean}\n *         - True if a left click\n *         - False if not a left click\n */\nfunction isSingleLeftClick(event) {\n  // Note: if you create something draggable, be sure to\n  // call it on both `mousedown` and `mousemove` event,\n  // otherwise `mousedown` should be enough for a button\n\n  if (event.button === undefined && event.buttons === undefined) {\n    // Why do we need `buttons` ?\n    // Because, middle mouse sometimes have this:\n    // e.button === 0 and e.buttons === 4\n    // Furthermore, we want to prevent combination click, something like\n    // HOLD middlemouse then left click, that would be\n    // e.button === 0, e.buttons === 5\n    // just `button` is not gonna work\n\n    // Alright, then what this block does ?\n    // this is for chrome `simulate mobile devices`\n    // I want to support this as well\n\n    return true;\n  }\n\n  if (event.button === 0 && event.buttons === undefined) {\n    // Touch screen, sometimes on some specific device, `buttons`\n    // doesn't have anything (safari on ios, blackberry...)\n\n    return true;\n  }\n\n  if (IE_VERSION === 9) {\n    // Ignore IE9\n\n    return true;\n  }\n\n  if (event.button !== 0 || event.buttons !== 1) {\n    // This is the reason we have those if else block above\n    // if any special case we can catch and let it slide\n    // we do it above, when get to here, this definitely\n    // is-not-left-click\n\n    return false;\n  }\n\n  return true;\n}\n\n/**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param {string} selector\n *        A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param {Element|String} [context=document]\n *        A DOM element within which to query. Can also be a selector\n *        string in which case the first matching element will be used\n *        as context. If missing (or no element matches selector), falls\n *        back to `document`.\n *\n * @return {Element|null}\n *         The element that was found or null.\n */\nvar $ = createQuerier('querySelector');\n\n/**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param {string} selector\n *           A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param {Element|String} [context=document]\n *           A DOM element within which to query. Can also be a selector\n *           string in which case the first matching element will be used\n *           as context. If missing (or no element matches selector), falls\n *           back to `document`.\n *\n * @return {NodeList}\n *         A element list of elements that were found. Will be empty if none were found.\n *\n */\nvar $$ = createQuerier('querySelectorAll');\n\n\n\nvar Dom = (Object.freeze || Object)({\n\tisReal: isReal,\n\tisEl: isEl,\n\tisInFrame: isInFrame,\n\tcreateEl: createEl,\n\ttextContent: textContent,\n\tprependTo: prependTo,\n\thasClass: hasClass,\n\taddClass: addClass,\n\tremoveClass: removeClass,\n\ttoggleClass: toggleClass,\n\tsetAttributes: setAttributes,\n\tgetAttributes: getAttributes,\n\tgetAttribute: getAttribute,\n\tsetAttribute: setAttribute,\n\tremoveAttribute: removeAttribute,\n\tblockTextSelection: blockTextSelection,\n\tunblockTextSelection: unblockTextSelection,\n\tgetBoundingClientRect: getBoundingClientRect,\n\tfindPosition: findPosition,\n\tgetPointerPosition: getPointerPosition,\n\tisTextNode: isTextNode,\n\temptyEl: emptyEl,\n\tnormalizeContent: normalizeContent,\n\tappendContent: appendContent,\n\tinsertContent: insertContent,\n\tisSingleLeftClick: isSingleLeftClick,\n\t$: $,\n\t$$: $$\n});\n\n/**\n * @file guid.js\n * @module guid\n */\n\n/**\n * Unique ID for an element or function\n * @type {Number}\n */\nvar _guid = 1;\n\n/**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n *         A new unique ID.\n */\nfunction newGUID() {\n  return _guid++;\n}\n\n/**\n * @file dom-data.js\n * @module dom-data\n */\n/**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\nvar elData = {};\n\n/*\n * Unique attribute name to store an element's guid in\n *\n * @type {String}\n * @constant\n * @private\n */\nvar elIdAttr = 'vdata' + new Date().getTime();\n\n/**\n * Returns the cache object where data for an element is stored\n *\n * @param {Element} el\n *        Element to store data for.\n *\n * @return {Object}\n *         The cache object for that el that was passed in.\n */\nfunction getData(el) {\n  var id = el[elIdAttr];\n\n  if (!id) {\n    id = el[elIdAttr] = newGUID();\n  }\n\n  if (!elData[id]) {\n    elData[id] = {};\n  }\n\n  return elData[id];\n}\n\n/**\n * Returns whether or not an element has cached data\n *\n * @param {Element} el\n *        Check if this element has cached data.\n *\n * @return {boolean}\n *         - True if the DOM element has cached data.\n *         - False otherwise.\n */\nfunction hasData(el) {\n  var id = el[elIdAttr];\n\n  if (!id) {\n    return false;\n  }\n\n  return !!Object.getOwnPropertyNames(elData[id]).length;\n}\n\n/**\n * Delete data for the element from the cache and the guid attr from getElementById\n *\n * @param {Element} el\n *        Remove cached data for this element.\n */\nfunction removeData(el) {\n  var id = el[elIdAttr];\n\n  if (!id) {\n    return;\n  }\n\n  // Remove all stored data\n  delete elData[id];\n\n  // Remove the elIdAttr property from the DOM node\n  try {\n    delete el[elIdAttr];\n  } catch (e) {\n    if (el.removeAttribute) {\n      el.removeAttribute(elIdAttr);\n    } else {\n      // IE doesn't appear to support removeAttribute on the document element\n      el[elIdAttr] = null;\n    }\n  }\n}\n\n/**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @module events\n */\n\n/**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n *        Element to clean up\n *\n * @param {string} type\n *        Type of event to clean up\n */\nfunction _cleanUpEvents(elem, type) {\n  var data = getData(elem);\n\n  // Remove the events of a particular type if there are none left\n  if (data.handlers[type].length === 0) {\n    delete data.handlers[type];\n    // data.handlers[type] = null;\n    // Setting to null was causing an error with data.handlers\n\n    // Remove the meta-handler from the element\n    if (elem.removeEventListener) {\n      elem.removeEventListener(type, data.dispatcher, false);\n    } else if (elem.detachEvent) {\n      elem.detachEvent('on' + type, data.dispatcher);\n    }\n  }\n\n  // Remove the events object if there are no types left\n  if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n    delete data.handlers;\n    delete data.dispatcher;\n    delete data.disabled;\n  }\n\n  // Finally remove the element data if there is no data left\n  if (Object.getOwnPropertyNames(data).length === 0) {\n    removeData(elem);\n  }\n}\n\n/**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n *        The event method we want to use.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} callback\n *        Event listener.\n */\nfunction _handleMultipleEvents(fn, elem, types, callback) {\n  types.forEach(function (type) {\n    // Call the event method for each one of the types\n    fn(elem, type, callback);\n  });\n}\n\n/**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n *        Event object to fix.\n *\n * @return {Object}\n *         Fixed event object.\n */\nfunction fixEvent(event) {\n\n  function returnTrue() {\n    return true;\n  }\n\n  function returnFalse() {\n    return false;\n  }\n\n  // Test if fixing up is needed\n  // Used to check if !event.stopPropagation instead of isPropagationStopped\n  // But native events return true for stopPropagation, but don't have\n  // other expected methods like isPropagationStopped. Seems to be a problem\n  // with the Javascript Ninja code. So we're just overriding all events now.\n  if (!event || !event.isPropagationStopped) {\n    var old = event || window.event;\n\n    event = {};\n    // Clone the old object so that we can modify the values event = {};\n    // IE8 Doesn't like when you mess with native event properties\n    // Firefox returns false for event.hasOwnProperty('type') and other props\n    //  which makes copying more difficult.\n    // TODO: Probably best to create a whitelist of event props\n    for (var key in old) {\n      // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n      // and webkitMovementX/Y\n      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY') {\n        // Chrome 32+ warns if you try to copy deprecated returnValue, but\n        // we still want to if preventDefault isn't supported (IE8).\n        if (!(key === 'returnValue' && old.preventDefault)) {\n          event[key] = old[key];\n        }\n      }\n    }\n\n    // The event occurred on this element\n    if (!event.target) {\n      event.target = event.srcElement || document;\n    }\n\n    // Handle which other element the event is related to\n    if (!event.relatedTarget) {\n      event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n    }\n\n    // Stop the default browser action\n    event.preventDefault = function () {\n      if (old.preventDefault) {\n        old.preventDefault();\n      }\n      event.returnValue = false;\n      old.returnValue = false;\n      event.defaultPrevented = true;\n    };\n\n    event.defaultPrevented = false;\n\n    // Stop the event from bubbling\n    event.stopPropagation = function () {\n      if (old.stopPropagation) {\n        old.stopPropagation();\n      }\n      event.cancelBubble = true;\n      old.cancelBubble = true;\n      event.isPropagationStopped = returnTrue;\n    };\n\n    event.isPropagationStopped = returnFalse;\n\n    // Stop the event from bubbling and executing other handlers\n    event.stopImmediatePropagation = function () {\n      if (old.stopImmediatePropagation) {\n        old.stopImmediatePropagation();\n      }\n      event.isImmediatePropagationStopped = returnTrue;\n      event.stopPropagation();\n    };\n\n    event.isImmediatePropagationStopped = returnFalse;\n\n    // Handle mouse position\n    if (event.clientX !== null && event.clientX !== undefined) {\n      var doc = document.documentElement;\n      var body = document.body;\n\n      event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n      event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n    }\n\n    // Handle key presses\n    event.which = event.charCode || event.keyCode;\n\n    // Fix button for mouse clicks:\n    // 0 == left; 1 == middle; 2 == right\n    if (event.button !== null && event.button !== undefined) {\n\n      // The following is disabled because it does not pass videojs-standard\n      // and... yikes.\n      /* eslint-disable */\n      event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n      /* eslint-enable */\n    }\n  }\n\n  // Returns fixed-up instance\n  return event;\n}\n\n/**\n * Whether passive event listeners are supported\n */\nvar _supportsPassive = false;\n\n(function () {\n  try {\n    var opts = Object.defineProperty({}, 'passive', {\n      get: function get() {\n        _supportsPassive = true;\n      }\n    });\n\n    window.addEventListener('test', null, opts);\n    window.removeEventListener('test', null, opts);\n  } catch (e) {\n    // disregard\n  }\n})();\n\n/**\n * Touch events Chrome expects to be passive\n */\nvar passiveEvents = ['touchstart', 'touchmove'];\n\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string|string[]} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} fn\n *        Event listener.\n */\nfunction on(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(on, elem, type, fn);\n  }\n\n  var data = getData(elem);\n\n  // We need a place to store all our handler data\n  if (!data.handlers) {\n    data.handlers = {};\n  }\n\n  if (!data.handlers[type]) {\n    data.handlers[type] = [];\n  }\n\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  data.handlers[type].push(fn);\n\n  if (!data.dispatcher) {\n    data.disabled = false;\n\n    data.dispatcher = function (event, hash) {\n\n      if (data.disabled) {\n        return;\n      }\n\n      event = fixEvent(event);\n\n      var handlers = data.handlers[event.type];\n\n      if (handlers) {\n        // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n        var handlersCopy = handlers.slice(0);\n\n        for (var m = 0, n = handlersCopy.length; m < n; m++) {\n          if (event.isImmediatePropagationStopped()) {\n            break;\n          } else {\n            try {\n              handlersCopy[m].call(elem, event, hash);\n            } catch (e) {\n              log.error(e);\n            }\n          }\n        }\n      }\n    };\n  }\n\n  if (data.handlers[type].length === 1) {\n    if (elem.addEventListener) {\n      var options = false;\n\n      if (_supportsPassive && passiveEvents.indexOf(type) > -1) {\n        options = { passive: true };\n      }\n      elem.addEventListener(type, data.dispatcher, options);\n    } else if (elem.attachEvent) {\n      elem.attachEvent('on' + type, data.dispatcher);\n    }\n  }\n}\n\n/**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n *        Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n *        Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {EventTarget~EventListener} [fn]\n *        Specific listener to remove. Don't include to remove listeners for an event\n *        type.\n */\nfunction off(elem, type, fn) {\n  // Don't want to add a cache object through getElData if not needed\n  if (!hasData(elem)) {\n    return;\n  }\n\n  var data = getData(elem);\n\n  // If no events exist, nothing to unbind\n  if (!data.handlers) {\n    return;\n  }\n\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(off, elem, type, fn);\n  }\n\n  // Utility function\n  var removeType = function removeType(el, t) {\n    data.handlers[t] = [];\n    _cleanUpEvents(el, t);\n  };\n\n  // Are we removing all bound events?\n  if (type === undefined) {\n    for (var t in data.handlers) {\n      if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n        removeType(elem, t);\n      }\n    }\n    return;\n  }\n\n  var handlers = data.handlers[type];\n\n  // If no handlers exist, nothing to unbind\n  if (!handlers) {\n    return;\n  }\n\n  // If no listener was provided, remove all listeners for type\n  if (!fn) {\n    removeType(elem, type);\n    return;\n  }\n\n  // We're only removing a single handler\n  if (fn.guid) {\n    for (var n = 0; n < handlers.length; n++) {\n      if (handlers[n].guid === fn.guid) {\n        handlers.splice(n--, 1);\n      }\n    }\n  }\n\n  _cleanUpEvents(elem, type);\n}\n\n/**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n *        Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n *        A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n *        data hash to pass along with the event\n *\n * @return {boolean|undefined}\n *         - Returns the opposite of `defaultPrevented` if default was prevented\n *         - Otherwise returns undefined\n */\nfunction trigger(elem, event, hash) {\n  // Fetches element data and a reference to the parent (for bubbling).\n  // Don't want to add a data object to cache for every parent,\n  // so checking hasElData first.\n  var elemData = hasData(elem) ? getData(elem) : {};\n  var parent = elem.parentNode || elem.ownerDocument;\n  // type = event.type || event,\n  // handler;\n\n  // If an event name was passed as a string, creates an event out of it\n  if (typeof event === 'string') {\n    event = { type: event, target: elem };\n  } else if (!event.target) {\n    event.target = elem;\n  }\n\n  // Normalizes the event properties.\n  event = fixEvent(event);\n\n  // If the passed element has a dispatcher, executes the established handlers.\n  if (elemData.dispatcher) {\n    elemData.dispatcher.call(elem, event, hash);\n  }\n\n  // Unless explicitly stopped or the event does not bubble (e.g. media events)\n  // recursively calls this function to bubble the event up the DOM.\n  if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n    trigger.call(null, parent, event, hash);\n\n    // If at the top of the DOM, triggers the default action unless disabled.\n  } else if (!parent && !event.defaultPrevented) {\n    var targetData = getData(event.target);\n\n    // Checks if the target has a default action for this event.\n    if (event.target[event.type]) {\n      // Temporarily disables event dispatching on the target as we have already executed the handler.\n      targetData.disabled = true;\n      // Executes the default action.\n      if (typeof event.target[event.type] === 'function') {\n        event.target[event.type]();\n      }\n      // Re-enables event dispatching.\n      targetData.disabled = false;\n    }\n  }\n\n  // Inform the triggerer if the default was prevented by returning false\n  return !event.defaultPrevented;\n}\n\n/**\n * Trigger a listener only once for an event\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event Listener function\n */\nfunction one(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(one, elem, type, fn);\n  }\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  };\n\n  // copy the guid to the new function so it can removed using the original function's ID\n  func.guid = fn.guid = fn.guid || newGUID();\n  on(elem, type, func);\n}\n\nvar Events = (Object.freeze || Object)({\n\tfixEvent: fixEvent,\n\ton: on,\n\toff: off,\n\ttrigger: trigger,\n\tone: one\n});\n\n/**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\nvar _windowLoaded = false;\nvar videojs$2 = void 0;\n\n/**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\nvar autoSetup = function autoSetup() {\n\n  // Protect against breakage in non-browser environments and check global autoSetup option.\n  if (!isReal() || videojs$2.options.autoSetup === false) {\n    return;\n  }\n\n  // One day, when we stop supporting IE8, go back to this, but in the meantime...*hack hack hack*\n  // var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n  // var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n  // var mediaEls = vids.concat(audios);\n\n  // Because IE8 doesn't support calling slice on a node list, we need to loop\n  // through each list of elements to build up a new, combined list of elements.\n  var vids = document.getElementsByTagName('video');\n  var audios = document.getElementsByTagName('audio');\n  var divs = document.getElementsByTagName('video-js');\n  var mediaEls = [];\n\n  if (vids && vids.length > 0) {\n    for (var i = 0, e = vids.length; i < e; i++) {\n      mediaEls.push(vids[i]);\n    }\n  }\n\n  if (audios && audios.length > 0) {\n    for (var _i = 0, _e = audios.length; _i < _e; _i++) {\n      mediaEls.push(audios[_i]);\n    }\n  }\n\n  if (divs && divs.length > 0) {\n    for (var _i2 = 0, _e2 = divs.length; _i2 < _e2; _i2++) {\n      mediaEls.push(divs[_i2]);\n    }\n  }\n\n  // Check if any media elements exist\n  if (mediaEls && mediaEls.length > 0) {\n\n    for (var _i3 = 0, _e3 = mediaEls.length; _i3 < _e3; _i3++) {\n      var mediaEl = mediaEls[_i3];\n\n      // Check if element exists, has getAttribute func.\n      // IE seems to consider typeof el.getAttribute == 'object' instead of\n      // 'function' like expected, at least when loading the player immediately.\n      if (mediaEl && mediaEl.getAttribute) {\n\n        // Make sure this player hasn't already been set up.\n        if (mediaEl.player === undefined) {\n          var options = mediaEl.getAttribute('data-setup');\n\n          // Check if data-setup attr exists.\n          // We only auto-setup if they've added the data-setup attr.\n          if (options !== null) {\n            // Create new video.js instance.\n            videojs$2(mediaEl);\n          }\n        }\n\n        // If getAttribute isn't defined, we need to wait for the DOM.\n      } else {\n        autoSetupTimeout(1);\n        break;\n      }\n    }\n\n    // No videos were found, so keep looping unless page is finished loading.\n  } else if (!_windowLoaded) {\n    autoSetupTimeout(1);\n  }\n};\n\n/**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n *        How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n *        The videojs library function\n */\nfunction autoSetupTimeout(wait, vjs) {\n  if (vjs) {\n    videojs$2 = vjs;\n  }\n\n  window.setTimeout(autoSetup, wait);\n}\n\nif (isReal() && document.readyState === 'complete') {\n  _windowLoaded = true;\n} else {\n  /**\n   * Listen for the load event on window, and set _windowLoaded to true.\n   *\n   * @listens load\n   */\n  one(window, 'load', function () {\n    _windowLoaded = true;\n  });\n}\n\n/**\n * @file stylesheet.js\n * @module stylesheet\n */\n/**\n * Create a DOM syle element given a className for it.\n *\n * @param {string} className\n *        The className to add to the created style element.\n *\n * @return {Element}\n *         The element that was created.\n */\nvar createStyleElement = function createStyleElement(className) {\n  var style = document.createElement('style');\n\n  style.className = className;\n\n  return style;\n};\n\n/**\n * Add text to a DOM element.\n *\n * @param {Element} el\n *        The Element to add text content to.\n *\n * @param {string} content\n *        The text to add to the element.\n */\nvar setTextContent = function setTextContent(el, content) {\n  if (el.styleSheet) {\n    el.styleSheet.cssText = content;\n  } else {\n    el.textContent = content;\n  }\n};\n\n/**\n * @file fn.js\n * @module fn\n */\n/**\n * Bind (a.k.a proxy or Context). A simple method for changing the context of a function\n * It also stores a unique id on the function so it can be easily removed from events.\n *\n * @param {Mixed} context\n *        The object to bind as scope.\n *\n * @param {Function} fn\n *        The function to be bound to a scope.\n *\n * @param {number} [uid]\n *        An optional unique ID for the function to be set\n *\n * @return {Function}\n *         The new function that will be bound into the context given\n */\nvar bind = function bind(context, fn, uid) {\n  // Make sure the function has a unique ID\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  // Create the new function that changes the context\n  var bound = function bound() {\n    return fn.apply(context, arguments);\n  };\n\n  // Allow for the ability to individualize this function\n  // Needed in the case where multiple objects might share the same prototype\n  // IF both items add an event listener with the same function, then you try to remove just one\n  // it will remove both because they both have the same guid.\n  // when using this, you need to use the bind method when you remove the listener as well.\n  // currently used in text tracks\n  bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n\n  return bound;\n};\n\n/**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @param  {Function} fn\n *         The function to be throttled.\n *\n * @param  {Number}   wait\n *         The number of milliseconds by which to throttle.\n *\n * @return {Function}\n */\nvar throttle = function throttle(fn, wait) {\n  var last = Date.now();\n\n  var throttled = function throttled() {\n    var now = Date.now();\n\n    if (now - last >= wait) {\n      fn.apply(undefined, arguments);\n      last = now;\n    }\n  };\n\n  return throttled;\n};\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @param  {Function} func\n *         The function to wrap with debounce behavior.\n *\n * @param  {number} wait\n *         The number of milliseconds to wait after the last invocation.\n *\n * @param  {boolean} [immediate]\n *         Whether or not to invoke the function immediately upon creation.\n *\n * @param  {Object} [context=window]\n *         The \"context\" in which the debounced function should debounce. For\n *         example, if this function should be tied to a Video.js player,\n *         the player can be passed here. Alternatively, defaults to the\n *         global `window` object.\n *\n * @return {Function}\n *         A debounced function.\n */\nvar debounce = function debounce(func, wait, immediate) {\n  var context = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : window;\n\n  var timeout = void 0;\n\n  var cancel = function cancel() {\n    context.clearTimeout(timeout);\n    timeout = null;\n  };\n\n  /* eslint-disable consistent-this */\n  var debounced = function debounced() {\n    var self = this;\n    var args = arguments;\n\n    var _later = function later() {\n      timeout = null;\n      _later = null;\n      if (!immediate) {\n        func.apply(self, args);\n      }\n    };\n\n    if (!timeout && immediate) {\n      func.apply(self, args);\n    }\n\n    context.clearTimeout(timeout);\n    timeout = context.setTimeout(_later, wait);\n  };\n  /* eslint-enable consistent-this */\n\n  debounced.cancel = cancel;\n\n  return debounced;\n};\n\n/**\n * @file src/js/event-target.js\n */\n/**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\nvar EventTarget = function EventTarget() {};\n\n/**\n * A Custom DOM event.\n *\n * @typedef {Object} EventTarget~Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n/**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {EventTarget~Event} event\n *        the event that triggered this function\n *\n * @param {Object} [hash]\n *        hash of data sent during the event\n */\n\n/**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n *         will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\nEventTarget.prototype.allowedEvents_ = {};\n\n/**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to call with `EventTarget`s\n */\nEventTarget.prototype.on = function (type, fn) {\n  // Remove the addEventListener alias before calling Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n  on(this, type, fn);\n  this.addEventListener = ael;\n};\n\n/**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\nEventTarget.prototype.addEventListener = EventTarget.prototype.on;\n\n/**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to remove.\n */\nEventTarget.prototype.off = function (type, fn) {\n  off(this, type, fn);\n};\n\n/**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\nEventTarget.prototype.removeEventListener = EventTarget.prototype.off;\n\n/**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to be called once for each event name.\n */\nEventTarget.prototype.one = function (type, fn) {\n  // Remove the addEventListener alialing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n  one(this, type, fn);\n  this.addEventListener = ael;\n};\n\n/**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n *        The name of the event, an `Event`, or an object with a key of type set to\n *        an event name.\n */\nEventTarget.prototype.trigger = function (event) {\n  var type = event.type || event;\n\n  if (typeof event === 'string') {\n    event = { type: type };\n  }\n  event = fixEvent(event);\n\n  if (this.allowedEvents_[type] && this['on' + type]) {\n    this['on' + type](event);\n  }\n\n  trigger(this, event);\n};\n\n/**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\nEventTarget.prototype.dispatchEvent = EventTarget.prototype.trigger;\n\n/**\n * @file mixins/evented.js\n * @module evented\n */\n/**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to test.\n *\n * @return {boolean}\n *         Whether or not the object appears to be evented.\n */\nvar isEvented = function isEvented(object) {\n  return object instanceof EventTarget || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {\n    return typeof object[k] === 'function';\n  });\n};\n\n/**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param  {string|Array} type\n *         The type value to test.\n *\n * @return {boolean}\n *         Whether or not the type is a valid event type.\n */\nvar isValidEventType = function isValidEventType(type) {\n  return (\n    // The regex here verifies that the `type` contains at least one non-\n    // whitespace character.\n    typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length\n  );\n};\n\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the target does not appear to be a valid event target.\n *\n * @param  {Object} target\n *         The object to test.\n */\nvar validateTarget = function validateTarget(target) {\n  if (!target.nodeName && !isEvented(target)) {\n    throw new Error('Invalid target; must be a DOM node or evented object.');\n  }\n};\n\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the type does not appear to be a valid event type.\n *\n * @param  {string|Array} type\n *         The type to test.\n */\nvar validateEventType = function validateEventType(type) {\n  if (!isValidEventType(type)) {\n    throw new Error('Invalid event type; must be a non-empty string or array.');\n  }\n};\n\n/**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the listener is not a function.\n *\n * @param  {Function} listener\n *         The listener to test.\n */\nvar validateListener = function validateListener(listener) {\n  if (typeof listener !== 'function') {\n    throw new Error('Invalid listener; must be a function.');\n  }\n};\n\n/**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param  {Object} self\n *         The evented object on which `on()` or `one()` was called. This\n *         object will be bound as the `this` value for the listener.\n *\n * @param  {Array} args\n *         An array of arguments passed to `on()` or `one()`.\n *\n * @return {Object}\n *         An object containing useful values for `on()` or `one()` calls.\n */\nvar normalizeListenArgs = function normalizeListenArgs(self, args) {\n\n  // If the number of arguments is less than 3, the target is always the\n  // evented object itself.\n  var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n  var target = void 0;\n  var type = void 0;\n  var listener = void 0;\n\n  if (isTargetingSelf) {\n    target = self.eventBusEl_;\n\n    // Deal with cases where we got 3 arguments, but we are still listening to\n    // the evented object itself.\n    if (args.length >= 3) {\n      args.shift();\n    }\n\n    type = args[0];\n    listener = args[1];\n  } else {\n    target = args[0];\n    type = args[1];\n    listener = args[2];\n  }\n\n  validateTarget(target);\n  validateEventType(type);\n  validateListener(listener);\n\n  listener = bind(self, listener);\n\n  return { isTargetingSelf: isTargetingSelf, target: target, type: type, listener: listener };\n};\n\n/**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param  {Element|Object} target\n *         A DOM node or evented object.\n *\n * @param  {string} method\n *         The event binding method to use (\"on\" or \"one\").\n *\n * @param  {string|Array} type\n *         One or more event type(s).\n *\n * @param  {Function} listener\n *         A listener function.\n */\nvar listen = function listen(target, method, type, listener) {\n  validateTarget(target);\n\n  if (target.nodeName) {\n    Events[method](target, type, listener);\n  } else {\n    target[method](type, listener);\n  }\n};\n\n/**\n * Contains methods that provide event capabilites to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\nvar EventedMixin = {\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  on: function on$$1() {\n    var _this = this;\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var _normalizeListenArgs = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,\n        target = _normalizeListenArgs.target,\n        type = _normalizeListenArgs.type,\n        listener = _normalizeListenArgs.listener;\n\n    listen(target, 'on', type, listener);\n\n    // If this object is listening to another evented object.\n    if (!isTargetingSelf) {\n\n      // If this object is disposed, remove the listener.\n      var removeListenerOnDispose = function removeListenerOnDispose() {\n        return _this.off(target, type, listener);\n      };\n\n      // Use the same function ID as the listener so we can remove it later it\n      // using the ID of the original listener.\n      removeListenerOnDispose.guid = listener.guid;\n\n      // Add a listener to the target's dispose event as well. This ensures\n      // that if the target is disposed BEFORE this object, we remove the\n      // removal listener that was just added. Otherwise, we create a memory leak.\n      var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {\n        return _this.off('dispose', removeListenerOnDispose);\n      };\n\n      // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n      removeRemoverOnTargetDispose.guid = listener.guid;\n\n      listen(this, 'on', 'dispose', removeListenerOnDispose);\n      listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n    }\n  },\n\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will only be called once and then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  one: function one$$1() {\n    var _this2 = this;\n\n    for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    var _normalizeListenArgs2 = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,\n        target = _normalizeListenArgs2.target,\n        type = _normalizeListenArgs2.type,\n        listener = _normalizeListenArgs2.listener;\n\n    // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'one', type, listener);\n\n      // Targeting another evented object.\n    } else {\n      var wrapper = function wrapper() {\n        for (var _len3 = arguments.length, largs = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n          largs[_key3] = arguments[_key3];\n        }\n\n        _this2.off(target, type, wrapper);\n        listener.apply(null, largs);\n      };\n\n      // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n      wrapper.guid = listener.guid;\n      listen(target, 'one', type, wrapper);\n    }\n  },\n\n\n  /**\n   * Removes listener(s) from event(s) on an evented object.\n   *\n   * @param  {string|Array|Element|Object} [targetOrType]\n   *         If this is a string or array, it represents the event type(s).\n   *\n   *         Another evented object can be passed here instead, in which case\n   *         ALL 3 arguments are _required_.\n   *\n   * @param  {string|Array|Function} [typeOrListener]\n   *         If the first argument was a string or array, this may be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function; otherwise, _all_ listeners bound to the\n   *         event type(s) will be removed.\n   */\n  off: function off$$1(targetOrType, typeOrListener, listener) {\n\n    // Targeting this evented object.\n    if (!targetOrType || isValidEventType(targetOrType)) {\n      off(this.eventBusEl_, targetOrType, typeOrListener);\n\n      // Targeting another evented object.\n    } else {\n      var target = targetOrType;\n      var type = typeOrListener;\n\n      // Fail fast and in a meaningful way!\n      validateTarget(target);\n      validateEventType(type);\n      validateListener(listener);\n\n      // Ensure there's at least a guid, even if the function hasn't been used\n      listener = bind(this, listener);\n\n      // Remove the dispose listener on this evented object, which was given\n      // the same guid as the event listener in on().\n      this.off('dispose', listener);\n\n      if (target.nodeName) {\n        off(target, type, listener);\n        off(target, 'dispose', listener);\n      } else if (isEvented(target)) {\n        target.off(type, listener);\n        target.off('dispose', listener);\n      }\n    }\n  },\n\n\n  /**\n   * Fire an event on this evented object, causing its listeners to be called.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash]\n   *          An additional object to pass along to listeners.\n   *\n   * @returns {boolean}\n   *          Whether or not the default behavior was prevented.\n   */\n  trigger: function trigger$$1(event, hash) {\n    return trigger(this.eventBusEl_, event, hash);\n  }\n};\n\n/**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param  {Object} target\n *         The object to which to add event methods.\n *\n * @param  {Object} [options={}]\n *         Options for customizing the mixin behavior.\n *\n * @param  {String} [options.eventBusKey]\n *         By default, adds a `eventBusEl_` DOM element to the target object,\n *         which is used as an event bus. If the target object already has a\n *         DOM element that should be used, pass its key here.\n *\n * @return {Object}\n *         The target object.\n */\nfunction evented(target) {\n  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n  var eventBusKey = options.eventBusKey;\n\n  // Set or create the eventBusEl_.\n\n  if (eventBusKey) {\n    if (!target[eventBusKey].nodeName) {\n      throw new Error('The eventBusKey \"' + eventBusKey + '\" does not refer to an element.');\n    }\n    target.eventBusEl_ = target[eventBusKey];\n  } else {\n    target.eventBusEl_ = createEl('span', { className: 'vjs-event-bus' });\n  }\n\n  assign(target, EventedMixin);\n\n  // When any evented object is disposed, it removes all its listeners.\n  target.on('dispose', function () {\n    target.off();\n    window.setTimeout(function () {\n      target.eventBusEl_ = null;\n    }, 0);\n  });\n\n  return target;\n}\n\n/**\n * @file mixins/stateful.js\n * @module stateful\n */\n/**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\nvar StatefulMixin = {\n\n  /**\n   * A hash containing arbitrary keys and values representing the state of\n   * the object.\n   *\n   * @type {Object}\n   */\n  state: {},\n\n  /**\n   * Set the state of an object by mutating its\n   * {@link module:stateful~StatefulMixin.state|state} object in place.\n   *\n   * @fires   module:stateful~StatefulMixin#statechanged\n   * @param   {Object|Function} stateUpdates\n   *          A new set of properties to shallow-merge into the plugin state.\n   *          Can be a plain object or a function returning a plain object.\n   *\n   * @returns {Object|undefined}\n   *          An object containing changes that occurred. If no changes\n   *          occurred, returns `undefined`.\n   */\n  setState: function setState(stateUpdates) {\n    var _this = this;\n\n    // Support providing the `stateUpdates` state as a function.\n    if (typeof stateUpdates === 'function') {\n      stateUpdates = stateUpdates();\n    }\n\n    var changes = void 0;\n\n    each(stateUpdates, function (value, key) {\n\n      // Record the change if the value is different from what's in the\n      // current state.\n      if (_this.state[key] !== value) {\n        changes = changes || {};\n        changes[key] = {\n          from: _this.state[key],\n          to: value\n        };\n      }\n\n      _this.state[key] = value;\n    });\n\n    // Only trigger \"statechange\" if there were changes AND we have a trigger\n    // function. This allows us to not require that the target object be an\n    // evented object.\n    if (changes && isEvented(this)) {\n\n      /**\n       * An event triggered on an object that is both\n       * {@link module:stateful|stateful} and {@link module:evented|evented}\n       * indicating that its state has changed.\n       *\n       * @event    module:stateful~StatefulMixin#statechanged\n       * @type     {Object}\n       * @property {Object} changes\n       *           A hash containing the properties that were changed and\n       *           the values they were changed `from` and `to`.\n       */\n      this.trigger({\n        changes: changes,\n        type: 'statechanged'\n      });\n    }\n\n    return changes;\n  }\n};\n\n/**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param   {Object} target\n *          The object to be made stateful.\n *\n * @param   {Object} [defaultState]\n *          A default set of properties to populate the newly-stateful object's\n *          `state` property.\n *\n * @returns {Object}\n *          Returns the `target`.\n */\nfunction stateful(target, defaultState) {\n  assign(target, StatefulMixin);\n\n  // This happens after the mixing-in because we need to replace the `state`\n  // added in that step.\n  target.state = assign({}, target.state, defaultState);\n\n  // Auto-bind the `handleStateChanged` method of the target object if it exists.\n  if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n    target.on('statechanged', target.handleStateChanged);\n  }\n\n  return target;\n}\n\n/**\n * @file to-title-case.js\n * @module to-title-case\n */\n\n/**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n *        String to be uppercased\n *\n * @return {string}\n *         The string with an uppercased first letter\n */\nfunction toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.charAt(0).toUpperCase() + string.slice(1);\n}\n\n/**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n *        The first string to compare\n *\n * @param {string} str2\n *        The second string to compare\n *\n * @return {boolean}\n *         Whether the TitleCase versions of the strings are equal\n */\nfunction titleCaseEquals(str1, str2) {\n  return toTitleCase(str1) === toTitleCase(str2);\n}\n\n/**\n * @file merge-options.js\n * @module merge-options\n */\n/**\n * Deep-merge one or more options objects, recursively merging **only** plain\n * object properties.\n *\n * @param   {Object[]} sources\n *          One or more objects to merge into a new object.\n *\n * @returns {Object}\n *          A new object that is the merged result of all sources.\n */\nfunction mergeOptions() {\n  var result = {};\n\n  for (var _len = arguments.length, sources = Array(_len), _key = 0; _key < _len; _key++) {\n    sources[_key] = arguments[_key];\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      if (!isPlain(value)) {\n        result[key] = value;\n        return;\n      }\n\n      if (!isPlain(result[key])) {\n        result[key] = {};\n      }\n\n      result[key] = mergeOptions(result[key], value);\n    });\n  });\n\n  return result;\n}\n\n/**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n/**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n\nvar Component = function () {\n\n  /**\n   * A callback that is called when a component is ready. Does not have any\n   * paramters and any callback value will be ignored.\n   *\n   * @callback Component~ReadyCallback\n   * @this Component\n   */\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Object[]} [options.children]\n   *        An array of children objects to intialize this component with. Children objects have\n   *        a name property that will be used if more than one component of the same type needs to be\n   *        added.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Function that gets called when the `Component` is ready.\n   */\n  function Component(player, options, ready) {\n    classCallCheck(this, Component);\n\n\n    // The component might be the player itself and we can't pass `this` to super\n    if (!player && this.play) {\n      this.player_ = player = this; // eslint-disable-line\n    } else {\n      this.player_ = player;\n    }\n\n    // Make a copy of prototype.options_ to protect against overriding defaults\n    this.options_ = mergeOptions({}, this.options_);\n\n    // Updated options with supplied options\n    options = this.options_ = mergeOptions(this.options_, options);\n\n    // Get ID from options or options element if one is supplied\n    this.id_ = options.id || options.el && options.el.id;\n\n    // If there was no ID from the options, generate one\n    if (!this.id_) {\n      // Don't require the player ID function in the case of mock players\n      var id = player && player.id && player.id() || 'no_player';\n\n      this.id_ = id + '_component_' + newGUID();\n    }\n\n    this.name_ = options.name || null;\n\n    // Create element if one wasn't provided in options\n    if (options.el) {\n      this.el_ = options.el;\n    } else if (options.createEl !== false) {\n      this.el_ = this.createEl();\n    }\n\n    // if evented is anything except false, we want to mixin in evented\n    if (options.evented !== false) {\n      // Make this an evented object and use `el_`, if available, as its event bus\n      evented(this, { eventBusKey: this.el_ ? 'el_' : null });\n    }\n    stateful(this, this.constructor.defaultState);\n\n    this.children_ = [];\n    this.childIndex_ = {};\n    this.childNameIndex_ = {};\n\n    // Add any child components in options\n    if (options.initChildren !== false) {\n      this.initChildren();\n    }\n\n    this.ready(ready);\n    // Don't want to trigger ready here or it will before init is actually\n    // finished for all children that run this constructor\n\n    if (options.reportTouchActivity !== false) {\n      this.enableTouchActivity();\n    }\n  }\n\n  /**\n   * Dispose of the `Component` and all child components.\n   *\n   * @fires Component#dispose\n   */\n\n\n  Component.prototype.dispose = function dispose() {\n\n    /**\n     * Triggered when a `Component` is disposed.\n     *\n     * @event Component#dispose\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up\n     */\n    this.trigger({ type: 'dispose', bubbles: false });\n\n    // Dispose all children.\n    if (this.children_) {\n      for (var i = this.children_.length - 1; i >= 0; i--) {\n        if (this.children_[i].dispose) {\n          this.children_[i].dispose();\n        }\n      }\n    }\n\n    // Delete child references\n    this.children_ = null;\n    this.childIndex_ = null;\n    this.childNameIndex_ = null;\n\n    if (this.el_) {\n      // Remove element from DOM\n      if (this.el_.parentNode) {\n        this.el_.parentNode.removeChild(this.el_);\n      }\n\n      removeData(this.el_);\n      this.el_ = null;\n    }\n\n    // remove reference to the player after disposing of the element\n    this.player_ = null;\n  };\n\n  /**\n   * Return the {@link Player} that the `Component` has attached to.\n   *\n   * @return {Player}\n   *         The player that this `Component` has attached to.\n   */\n\n\n  Component.prototype.player = function player() {\n    return this.player_;\n  };\n\n  /**\n   * Deep merge of options objects with new options.\n   * > Note: When both `obj` and `options` contain properties whose values are objects.\n   *         The two properties get merged using {@link module:mergeOptions}\n   *\n   * @param {Object} obj\n   *        The object that contains new options.\n   *\n   * @return {Object}\n   *         A new object of `this.options_` and `obj` merged together.\n   *\n   * @deprecated since version 5\n   */\n\n\n  Component.prototype.options = function options(obj) {\n    log.warn('this.options() has been deprecated and will be moved to the constructor in 6.0');\n\n    if (!obj) {\n      return this.options_;\n    }\n\n    this.options_ = mergeOptions(this.options_, obj);\n    return this.options_;\n  };\n\n  /**\n   * Get the `Component`s DOM element\n   *\n   * @return {Element}\n   *         The DOM element for this `Component`.\n   */\n\n\n  Component.prototype.el = function el() {\n    return this.el_;\n  };\n\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tagName]\n   *        Element's DOM node type. e.g. 'div'\n   *\n   * @param {Object} [properties]\n   *        An object of properties that should be set.\n   *\n   * @param {Object} [attributes]\n   *        An object of attributes that should be set.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  Component.prototype.createEl = function createEl$$1(tagName, properties, attributes) {\n    return createEl(tagName, properties, attributes);\n  };\n\n  /**\n   * Localize a string given the string in english.\n   *\n   * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n   * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n   *\n   * If a `defaultValue` is provided, it'll use that over `string`,\n   * if a value isn't found in provided language files.\n   * This is useful if you want to have a descriptive key for token replacement\n   * but have a succinct localized string and not require `en.json` to be included.\n   *\n   * Currently, it is used for the progress bar timing.\n   * ```js\n   * {\n   *   \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n   * }\n   * ```\n   * It is then used like so:\n   * ```js\n   * this.localize('progress bar timing: currentTime={1} duration{2}',\n   *               [this.player_.currentTime(), this.player_.duration()],\n   *               '{1} of {2}');\n   * ```\n   *\n   * Which outputs something like: `01:23 of 24:56`.\n   *\n   *\n   * @param {string} string\n   *        The string to localize and the key to lookup in the language files.\n   * @param {string[]} [tokens]\n   *        If the current item has token replacements, provide the tokens here.\n   * @param {string} [defaultValue]\n   *        Defaults to `string`. Can be a default value to use for token replacement\n   *        if the lookup key is needed to be separate.\n   *\n   * @return {string}\n   *         The localized string or if no localization exists the english string.\n   */\n\n\n  Component.prototype.localize = function localize(string, tokens) {\n    var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : string;\n\n    var code = this.player_.language && this.player_.language();\n    var languages = this.player_.languages && this.player_.languages();\n    var language = languages && languages[code];\n    var primaryCode = code && code.split('-')[0];\n    var primaryLang = languages && languages[primaryCode];\n\n    var localizedString = defaultValue;\n\n    if (language && language[string]) {\n      localizedString = language[string];\n    } else if (primaryLang && primaryLang[string]) {\n      localizedString = primaryLang[string];\n    }\n\n    if (tokens) {\n      localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n        var value = tokens[index - 1];\n        var ret = value;\n\n        if (typeof value === 'undefined') {\n          ret = match;\n        }\n\n        return ret;\n      });\n    }\n\n    return localizedString;\n  };\n\n  /**\n   * Return the `Component`s DOM element. This is where children get inserted.\n   * This will usually be the the same as the element returned in {@link Component#el}.\n   *\n   * @return {Element}\n   *         The content element for this `Component`.\n   */\n\n\n  Component.prototype.contentEl = function contentEl() {\n    return this.contentEl_ || this.el_;\n  };\n\n  /**\n   * Get this `Component`s ID\n   *\n   * @return {string}\n   *         The id of this `Component`\n   */\n\n\n  Component.prototype.id = function id() {\n    return this.id_;\n  };\n\n  /**\n   * Get the `Component`s name. The name gets used to reference the `Component`\n   * and is set during registration.\n   *\n   * @return {string}\n   *         The name of this `Component`.\n   */\n\n\n  Component.prototype.name = function name() {\n    return this.name_;\n  };\n\n  /**\n   * Get an array of all child components\n   *\n   * @return {Array}\n   *         The children\n   */\n\n\n  Component.prototype.children = function children() {\n    return this.children_;\n  };\n\n  /**\n   * Returns the child `Component` with the given `id`.\n   *\n   * @param {string} id\n   *        The id of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `id` or undefined.\n   */\n\n\n  Component.prototype.getChildById = function getChildById(id) {\n    return this.childIndex_[id];\n  };\n\n  /**\n   * Returns the child `Component` with the given `name`.\n   *\n   * @param {string} name\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `name` or undefined.\n   */\n\n\n  Component.prototype.getChild = function getChild(name) {\n    if (!name) {\n      return;\n    }\n\n    name = toTitleCase(name);\n\n    return this.childNameIndex_[name];\n  };\n\n  /**\n   * Add a child `Component` inside the current `Component`.\n   *\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @param {number} [index=this.children_.length]\n   *        The index to attempt to add a child into.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   */\n\n\n  Component.prototype.addChild = function addChild(child) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var index = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.children_.length;\n\n    var component = void 0;\n    var componentName = void 0;\n\n    // If child is a string, create component with options\n    if (typeof child === 'string') {\n      componentName = toTitleCase(child);\n\n      var componentClassName = options.componentClass || componentName;\n\n      // Set name through options\n      options.name = componentName;\n\n      // Create a new object & element for this controls set\n      // If there's no .player_, this is a player\n      var ComponentClass = Component.getComponent(componentClassName);\n\n      if (!ComponentClass) {\n        throw new Error('Component ' + componentClassName + ' does not exist');\n      }\n\n      // data stored directly on the videojs object may be\n      // misidentified as a component to retain\n      // backwards-compatibility with 4.x. check to make sure the\n      // component class can be instantiated.\n      if (typeof ComponentClass !== 'function') {\n        return null;\n      }\n\n      component = new ComponentClass(this.player_ || this, options);\n\n      // child is a component instance\n    } else {\n      component = child;\n    }\n\n    this.children_.splice(index, 0, component);\n\n    if (typeof component.id === 'function') {\n      this.childIndex_[component.id()] = component;\n    }\n\n    // If a name wasn't used to create the component, check if we can use the\n    // name function of the component\n    componentName = componentName || component.name && toTitleCase(component.name());\n\n    if (componentName) {\n      this.childNameIndex_[componentName] = component;\n    }\n\n    // Add the UI object's element to the container div (box)\n    // Having an element is not required\n    if (typeof component.el === 'function' && component.el()) {\n      var childNodes = this.contentEl().children;\n      var refNode = childNodes[index] || null;\n\n      this.contentEl().insertBefore(component.el(), refNode);\n    }\n\n    // Return so it can stored on parent object if desired.\n    return component;\n  };\n\n  /**\n   * Remove a child `Component` from this `Component`s list of children. Also removes\n   * the child `Component`s element from this `Component`s element.\n   *\n   * @param {Component} component\n   *        The child `Component` to remove.\n   */\n\n\n  Component.prototype.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    if (!component || !this.children_) {\n      return;\n    }\n\n    var childFound = false;\n\n    for (var i = this.children_.length - 1; i >= 0; i--) {\n      if (this.children_[i] === component) {\n        childFound = true;\n        this.children_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!childFound) {\n      return;\n    }\n\n    this.childIndex_[component.id()] = null;\n    this.childNameIndex_[component.name()] = null;\n\n    var compEl = component.el();\n\n    if (compEl && compEl.parentNode === this.contentEl()) {\n      this.contentEl().removeChild(component.el());\n    }\n  };\n\n  /**\n   * Add and initialize default child `Component`s based upon options.\n   */\n\n\n  Component.prototype.initChildren = function initChildren() {\n    var _this = this;\n\n    var children = this.options_.children;\n\n    if (children) {\n      // `this` is `parent`\n      var parentOptions = this.options_;\n\n      var handleAdd = function handleAdd(child) {\n        var name = child.name;\n        var opts = child.opts;\n\n        // Allow options for children to be set at the parent options\n        // e.g. videojs(id, { controlBar: false });\n        // instead of videojs(id, { children: { controlBar: false });\n        if (parentOptions[name] !== undefined) {\n          opts = parentOptions[name];\n        }\n\n        // Allow for disabling default components\n        // e.g. options['children']['posterImage'] = false\n        if (opts === false) {\n          return;\n        }\n\n        // Allow options to be passed as a simple boolean if no configuration\n        // is necessary.\n        if (opts === true) {\n          opts = {};\n        }\n\n        // We also want to pass the original player options\n        // to each component as well so they don't need to\n        // reach back into the player for options later.\n        opts.playerOptions = _this.options_.playerOptions;\n\n        // Create and add the child component.\n        // Add a direct reference to the child by name on the parent instance.\n        // If two of the same component are used, different names should be supplied\n        // for each\n        var newChild = _this.addChild(name, opts);\n\n        if (newChild) {\n          _this[name] = newChild;\n        }\n      };\n\n      // Allow for an array of children details to passed in the options\n      var workingChildren = void 0;\n      var Tech = Component.getComponent('Tech');\n\n      if (Array.isArray(children)) {\n        workingChildren = children;\n      } else {\n        workingChildren = Object.keys(children);\n      }\n\n      workingChildren\n      // children that are in this.options_ but also in workingChildren  would\n      // give us extra children we do not want. So, we want to filter them out.\n      .concat(Object.keys(this.options_).filter(function (child) {\n        return !workingChildren.some(function (wchild) {\n          if (typeof wchild === 'string') {\n            return child === wchild;\n          }\n          return child === wchild.name;\n        });\n      })).map(function (child) {\n        var name = void 0;\n        var opts = void 0;\n\n        if (typeof child === 'string') {\n          name = child;\n          opts = children[name] || _this.options_[name] || {};\n        } else {\n          name = child.name;\n          opts = child;\n        }\n\n        return { name: name, opts: opts };\n      }).filter(function (child) {\n        // we have to make sure that child.name isn't in the techOrder since\n        // techs are registerd as Components but can't aren't compatible\n        // See https://github.com/videojs/video.js/issues/2772\n        var c = Component.getComponent(child.opts.componentClass || toTitleCase(child.name));\n\n        return c && !Tech.isTech(c);\n      }).forEach(handleAdd);\n    }\n  };\n\n  /**\n   * Builds the default DOM class name. Should be overriden by sub-components.\n   *\n   * @return {string}\n   *         The DOM class name for this object.\n   *\n   * @abstract\n   */\n\n\n  Component.prototype.buildCSSClass = function buildCSSClass() {\n    // Child classes can include a function that does:\n    // return 'CLASS NAME' + this._super();\n    return '';\n  };\n\n  /**\n   * Bind a listener to the component's ready state.\n   * Different from event listeners in that if the ready event has already happened\n   * it will trigger the function immediately.\n   *\n   * @return {Component}\n   *         Returns itself; method can be chained.\n   */\n\n\n  Component.prototype.ready = function ready(fn) {\n    var sync = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n\n    if (!fn) {\n      return;\n    }\n\n    if (!this.isReady_) {\n      this.readyQueue_ = this.readyQueue_ || [];\n      this.readyQueue_.push(fn);\n      return;\n    }\n\n    if (sync) {\n      fn.call(this);\n    } else {\n      // Call the function asynchronously by default for consistency\n      this.setTimeout(fn, 1);\n    }\n  };\n\n  /**\n   * Trigger all the ready listeners for this `Component`.\n   *\n   * @fires Component#ready\n   */\n\n\n  Component.prototype.triggerReady = function triggerReady() {\n    this.isReady_ = true;\n\n    // Ensure ready is triggered asynchronously\n    this.setTimeout(function () {\n      var readyQueue = this.readyQueue_;\n\n      // Reset Ready Queue\n      this.readyQueue_ = [];\n\n      if (readyQueue && readyQueue.length > 0) {\n        readyQueue.forEach(function (fn) {\n          fn.call(this);\n        }, this);\n      }\n\n      // Allow for using event listeners also\n      /**\n       * Triggered when a `Component` is ready.\n       *\n       * @event Component#ready\n       * @type {EventTarget~Event}\n       */\n      this.trigger('ready');\n    }, 1);\n  };\n\n  /**\n   * Find a single DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelector`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {Element|null}\n   *         the dom element that was found, or null\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n\n\n  Component.prototype.$ = function $$$1(selector, context) {\n    return $(selector, context || this.contentEl());\n  };\n\n  /**\n   * Finds all DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelectorAll`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {NodeList}\n   *         a list of dom elements that were found\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n\n\n  Component.prototype.$$ = function $$$$1(selector, context) {\n    return $$(selector, context || this.contentEl());\n  };\n\n  /**\n   * Check if a component's element has a CSS class name.\n   *\n   * @param {string} classToCheck\n   *        CSS class name to check.\n   *\n   * @return {boolean}\n   *         - True if the `Component` has the class.\n   *         - False if the `Component` does not have the class`\n   */\n\n\n  Component.prototype.hasClass = function hasClass$$1(classToCheck) {\n    return hasClass(this.el_, classToCheck);\n  };\n\n  /**\n   * Add a CSS class name to the `Component`s element.\n   *\n   * @param {string} classToAdd\n   *        CSS class name to add\n   */\n\n\n  Component.prototype.addClass = function addClass$$1(classToAdd) {\n    addClass(this.el_, classToAdd);\n  };\n\n  /**\n   * Remove a CSS class name from the `Component`s element.\n   *\n   * @param {string} classToRemove\n   *        CSS class name to remove\n   */\n\n\n  Component.prototype.removeClass = function removeClass$$1(classToRemove) {\n    removeClass(this.el_, classToRemove);\n  };\n\n  /**\n   * Add or remove a CSS class name from the component's element.\n   * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n   * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n   *\n   * @param  {string} classToToggle\n   *         The class to add or remove based on (@link Component#hasClass}\n   *\n   * @param  {boolean|Dom~predicate} [predicate]\n   *         An {@link Dom~predicate} function or a boolean\n   */\n\n\n  Component.prototype.toggleClass = function toggleClass$$1(classToToggle, predicate) {\n    toggleClass(this.el_, classToToggle, predicate);\n  };\n\n  /**\n   * Show the `Component`s element if it is hidden by removing the\n   * 'vjs-hidden' class name from it.\n   */\n\n\n  Component.prototype.show = function show() {\n    this.removeClass('vjs-hidden');\n  };\n\n  /**\n   * Hide the `Component`s element if it is currently showing by adding the\n   * 'vjs-hidden` class name to it.\n   */\n\n\n  Component.prototype.hide = function hide() {\n    this.addClass('vjs-hidden');\n  };\n\n  /**\n   * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n   * class name to it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n\n\n  Component.prototype.lockShowing = function lockShowing() {\n    this.addClass('vjs-lock-showing');\n  };\n\n  /**\n   * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n   * class name from it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n\n\n  Component.prototype.unlockShowing = function unlockShowing() {\n    this.removeClass('vjs-lock-showing');\n  };\n\n  /**\n   * Get the value of an attribute on the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to get the value from.\n   *\n   * @return {string|null}\n   *         - The value of the attribute that was asked for.\n   *         - Can be an empty string on some browsers if the attribute does not exist\n   *           or has no value\n   *         - Most browsers will return null if the attibute does not exist or has\n   *           no value.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n   */\n\n\n  Component.prototype.getAttribute = function getAttribute$$1(attribute) {\n    return getAttribute(this.el_, attribute);\n  };\n\n  /**\n   * Set the value of an attribute on the `Component`'s element\n   *\n   * @param {string} attribute\n   *        Name of the attribute to set.\n   *\n   * @param {string} value\n   *        Value to set the attribute to.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n   */\n\n\n  Component.prototype.setAttribute = function setAttribute$$1(attribute, value) {\n    setAttribute(this.el_, attribute, value);\n  };\n\n  /**\n   * Remove an attribute from the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to remove.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n   */\n\n\n  Component.prototype.removeAttribute = function removeAttribute$$1(attribute) {\n    removeAttribute(this.el_, attribute);\n  };\n\n  /**\n   * Get or set the width of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The width that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *           postpixed with '%' or 'px'.\n   */\n\n\n  Component.prototype.width = function width(num, skipListeners) {\n    return this.dimension('width', num, skipListeners);\n  };\n\n  /**\n   * Get or set the height of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The height that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *         postpixed with '%' or 'px'.\n   */\n\n\n  Component.prototype.height = function height(num, skipListeners) {\n    return this.dimension('height', num, skipListeners);\n  };\n\n  /**\n   * Set both the width and height of the `Component` element at the same time.\n   *\n   * @param  {number|string} width\n   *         Width to set the `Component`s element to.\n   *\n   * @param  {number|string} height\n   *         Height to set the `Component`s element to.\n   */\n\n\n  Component.prototype.dimensions = function dimensions(width, height) {\n    // Skip componentresize listeners on width for optimization\n    this.width(width, true);\n    this.height(height);\n  };\n\n  /**\n   * Get or set width or height of the `Component` element. This is the shared code\n   * for the {@link Component#width} and {@link Component#height}.\n   *\n   * Things to know:\n   * - If the width or height in an number this will return the number postfixed with 'px'.\n   * - If the width/height is a percent this will return the percent postfixed with '%'\n   * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n   *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n   *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n   *   for more information\n   * - If you want the computed style of the component, use {@link Component#currentWidth}\n   *   and {@link {Component#currentHeight}\n   *\n   * @fires Component#componentresize\n   *\n   * @param {string} widthOrHeight\n   8        'width' or 'height'\n   *\n   * @param  {number|string} [num]\n   8         New dimension\n   *\n   * @param  {boolean} [skipListeners]\n   *         Skip componentresize event trigger\n   *\n   * @return {number}\n   *         The dimension when getting or 0 if unset\n   */\n\n\n  Component.prototype.dimension = function dimension(widthOrHeight, num, skipListeners) {\n    if (num !== undefined) {\n      // Set to zero if null or literally NaN (NaN !== NaN)\n      if (num === null || num !== num) {\n        num = 0;\n      }\n\n      // Check if using css width/height (% or px) and adjust\n      if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n        this.el_.style[widthOrHeight] = num;\n      } else if (num === 'auto') {\n        this.el_.style[widthOrHeight] = '';\n      } else {\n        this.el_.style[widthOrHeight] = num + 'px';\n      }\n\n      // skipListeners allows us to avoid triggering the resize event when setting both width and height\n      if (!skipListeners) {\n        /**\n         * Triggered when a component is resized.\n         *\n         * @event Component#componentresize\n         * @type {EventTarget~Event}\n         */\n        this.trigger('componentresize');\n      }\n\n      return;\n    }\n\n    // Not setting a value, so getting it\n    // Make sure element exists\n    if (!this.el_) {\n      return 0;\n    }\n\n    // Get dimension value from style\n    var val = this.el_.style[widthOrHeight];\n    var pxIndex = val.indexOf('px');\n\n    if (pxIndex !== -1) {\n      // Return the pixel value with no 'px'\n      return parseInt(val.slice(0, pxIndex), 10);\n    }\n\n    // No px so using % or no style was set, so falling back to offsetWidth/height\n    // If component has display:none, offset will return 0\n    // TODO: handle display:none and no dimension style using px\n    return parseInt(this.el_['offset' + toTitleCase(widthOrHeight)], 10);\n  };\n\n  /**\n   * Get the computed width or the height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @param {string} widthOrHeight\n   *        A string containing 'width' or 'height'. Whichever one you want to get.\n   *\n   * @return {number}\n   *         The dimension that gets asked for or 0 if nothing was set\n   *         for that dimension.\n   */\n\n\n  Component.prototype.currentDimension = function currentDimension(widthOrHeight) {\n    var computedWidthOrHeight = 0;\n\n    if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n      throw new Error('currentDimension only accepts width or height value');\n    }\n\n    if (typeof window.getComputedStyle === 'function') {\n      var computedStyle = window.getComputedStyle(this.el_);\n\n      computedWidthOrHeight = computedStyle.getPropertyValue(widthOrHeight) || computedStyle[widthOrHeight];\n    }\n\n    // remove 'px' from variable and parse as integer\n    computedWidthOrHeight = parseFloat(computedWidthOrHeight);\n\n    // if the computed value is still 0, it's possible that the browser is lying\n    // and we want to check the offset values.\n    // This code also runs on IE8 and wherever getComputedStyle doesn't exist.\n    if (computedWidthOrHeight === 0) {\n      var rule = 'offset' + toTitleCase(widthOrHeight);\n\n      computedWidthOrHeight = this.el_[rule];\n    }\n\n    return computedWidthOrHeight;\n  };\n\n  /**\n   * An object that contains width and height values of the `Component`s\n   * computed style. Uses `window.getComputedStyle`.\n   *\n   * @typedef {Object} Component~DimensionObject\n   *\n   * @property {number} width\n   *           The width of the `Component`s computed style.\n   *\n   * @property {number} height\n   *           The height of the `Component`s computed style.\n   */\n\n  /**\n   * Get an object that contains computed width and height values of the\n   * component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {Component~DimensionObject}\n   *         The computed dimensions of the component's element.\n   */\n\n\n  Component.prototype.currentDimensions = function currentDimensions() {\n    return {\n      width: this.currentDimension('width'),\n      height: this.currentDimension('height')\n    };\n  };\n\n  /**\n   * Get the computed width of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed width of the component's element.\n   */\n\n\n  Component.prototype.currentWidth = function currentWidth() {\n    return this.currentDimension('width');\n  };\n\n  /**\n   * Get the computed height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed height of the component's element.\n   */\n\n\n  Component.prototype.currentHeight = function currentHeight() {\n    return this.currentDimension('height');\n  };\n\n  /**\n   * Set the focus to this component\n   */\n\n\n  Component.prototype.focus = function focus() {\n    this.el_.focus();\n  };\n\n  /**\n   * Remove the focus from this component\n   */\n\n\n  Component.prototype.blur = function blur() {\n    this.el_.blur();\n  };\n\n  /**\n   * Emit a 'tap' events when touch event support gets detected. This gets used to\n   * support toggling the controls through a tap on the video. They get enabled\n   * because every sub-component would have extra overhead otherwise.\n   *\n   * @private\n   * @fires Component#tap\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchleave\n   * @listens Component#touchcancel\n   * @listens Component#touchend\n    */\n\n\n  Component.prototype.emitTapEvents = function emitTapEvents() {\n    // Track the start time so we can determine how long the touch lasted\n    var touchStart = 0;\n    var firstTouch = null;\n\n    // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n    var tapMovementThreshold = 10;\n\n    // The maximum length a touch can be while still being considered a tap\n    var touchTimeThreshold = 200;\n\n    var couldBeTap = void 0;\n\n    this.on('touchstart', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length === 1) {\n        // Copy pageX/pageY from the object\n        firstTouch = {\n          pageX: event.touches[0].pageX,\n          pageY: event.touches[0].pageY\n        };\n        // Record start time so we can detect a tap vs. \"touch and hold\"\n        touchStart = new Date().getTime();\n        // Reset couldBeTap tracking\n        couldBeTap = true;\n      }\n    });\n\n    this.on('touchmove', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length > 1) {\n        couldBeTap = false;\n      } else if (firstTouch) {\n        // Some devices will throw touchmoves for all but the slightest of taps.\n        // So, if we moved only a small distance, this could still be a tap\n        var xdiff = event.touches[0].pageX - firstTouch.pageX;\n        var ydiff = event.touches[0].pageY - firstTouch.pageY;\n        var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n\n        if (touchDistance > tapMovementThreshold) {\n          couldBeTap = false;\n        }\n      }\n    });\n\n    var noTap = function noTap() {\n      couldBeTap = false;\n    };\n\n    // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n    this.on('touchleave', noTap);\n    this.on('touchcancel', noTap);\n\n    // When the touch ends, measure how long it took and trigger the appropriate\n    // event\n    this.on('touchend', function (event) {\n      firstTouch = null;\n      // Proceed only if the touchmove/leave/cancel event didn't happen\n      if (couldBeTap === true) {\n        // Measure how long the touch lasted\n        var touchTime = new Date().getTime() - touchStart;\n\n        // Make sure the touch was less than the threshold to be considered a tap\n        if (touchTime < touchTimeThreshold) {\n          // Don't let browser turn this into a click\n          event.preventDefault();\n          /**\n           * Triggered when a `Component` is tapped.\n           *\n           * @event Component#tap\n           * @type {EventTarget~Event}\n           */\n          this.trigger('tap');\n          // It may be good to copy the touchend event object and change the\n          // type to tap, if the other event properties aren't exact after\n          // Events.fixEvent runs (e.g. event.target)\n        }\n      }\n    });\n  };\n\n  /**\n   * This function reports user activity whenever touch events happen. This can get\n   * turned off by any sub-components that wants touch events to act another way.\n   *\n   * Report user touch activity when touch events occur. User activity gets used to\n   * determine when controls should show/hide. It is simple when it comes to mouse\n   * events, because any mouse event should show the controls. So we capture mouse\n   * events that bubble up to the player and report activity when that happens.\n   * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n   * controls. So touch events can't help us at the player level either.\n   *\n   * User activity gets checked asynchronously. So what could happen is a tap event\n   * on the video turns the controls off. Then the `touchend` event bubbles up to\n   * the player. Which, if it reported user activity, would turn the controls right\n   * back on. We also don't want to completely block touch events from bubbling up.\n   * Furthermore a `touchmove` event and anything other than a tap, should not turn\n   * controls back on.\n   *\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchend\n   * @listens Component#touchcancel\n   */\n\n\n  Component.prototype.enableTouchActivity = function enableTouchActivity() {\n    // Don't continue if the root player doesn't support reporting user activity\n    if (!this.player() || !this.player().reportUserActivity) {\n      return;\n    }\n\n    // listener for reporting that the user is active\n    var report = bind(this.player(), this.player().reportUserActivity);\n\n    var touchHolding = void 0;\n\n    this.on('touchstart', function () {\n      report();\n      // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n      this.clearInterval(touchHolding);\n      // report at the same interval as activityCheck\n      touchHolding = this.setInterval(report, 250);\n    });\n\n    var touchEnd = function touchEnd(event) {\n      report();\n      // stop the interval that maintains activity if the touch is holding\n      this.clearInterval(touchHolding);\n    };\n\n    this.on('touchmove', report);\n    this.on('touchend', touchEnd);\n    this.on('touchcancel', touchEnd);\n  };\n\n  /**\n   * A callback that has no parameters and is bound into `Component`s context.\n   *\n   * @callback Component~GenericCallback\n   * @this Component\n   */\n\n  /**\n   * Creates a function that runs after an `x` millisecond timeout. This function is a\n   * wrapper around `window.setTimeout`. There are a few reasons to use this one\n   * instead though:\n   * 1. It gets cleared via  {@link Component#clearTimeout} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n   *\n   * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n   *         will cause its dispose listener not to get cleaned up! Please use\n   *         {@link Component#clearTimeout} or {@link Component#dispose} instead.\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function that will be run after `timeout`.\n   *\n   * @param {number} timeout\n   *        Timeout in milliseconds to delay before executing the specified function.\n   *\n   * @return {number}\n   *         Returns a timeout ID that gets used to identify the timeout. It can also\n   *         get used in {@link Component#clearTimeout} to clear the timeout that\n   *         was set.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n   */\n\n\n  Component.prototype.setTimeout = function setTimeout(fn, timeout) {\n    var _this2 = this;\n\n    // declare as variables so they are properly available in timeout function\n    // eslint-disable-next-line\n    var timeoutId, disposeFn;\n\n    fn = bind(this, fn);\n\n    timeoutId = window.setTimeout(function () {\n      _this2.off('dispose', disposeFn);\n      fn();\n    }, timeout);\n\n    disposeFn = function disposeFn() {\n      return _this2.clearTimeout(timeoutId);\n    };\n\n    disposeFn.guid = 'vjs-timeout-' + timeoutId;\n\n    this.on('dispose', disposeFn);\n\n    return timeoutId;\n  };\n\n  /**\n   * Clears a timeout that gets created via `window.setTimeout` or\n   * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n   * use this function instead of `window.clearTimout`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} timeoutId\n   *        The id of the timeout to clear. The return value of\n   *        {@link Component#setTimeout} or `window.setTimeout`.\n   *\n   * @return {number}\n   *         Returns the timeout id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n   */\n\n\n  Component.prototype.clearTimeout = function clearTimeout(timeoutId) {\n    window.clearTimeout(timeoutId);\n\n    var disposeFn = function disposeFn() {};\n\n    disposeFn.guid = 'vjs-timeout-' + timeoutId;\n\n    this.off('dispose', disposeFn);\n\n    return timeoutId;\n  };\n\n  /**\n   * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n   * around `window.setInterval`. There are a few reasons to use this one instead though.\n   * 1. It gets cleared via  {@link Component#clearInterval} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will be a {@link Component~GenericCallback}\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function to run every `x` seconds.\n   *\n   * @param {number} interval\n   *        Execute the specified function every `x` milliseconds.\n   *\n   * @return {number}\n   *         Returns an id that can be used to identify the interval. It can also be be used in\n   *         {@link Component#clearInterval} to clear the interval.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n   */\n\n\n  Component.prototype.setInterval = function setInterval(fn, interval) {\n    var _this3 = this;\n\n    fn = bind(this, fn);\n\n    var intervalId = window.setInterval(fn, interval);\n\n    var disposeFn = function disposeFn() {\n      return _this3.clearInterval(intervalId);\n    };\n\n    disposeFn.guid = 'vjs-interval-' + intervalId;\n\n    this.on('dispose', disposeFn);\n\n    return intervalId;\n  };\n\n  /**\n   * Clears an interval that gets created via `window.setInterval` or\n   * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}\n   * use this function instead of `window.clearInterval`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} intervalId\n   *        The id of the interval to clear. The return value of\n   *        {@link Component#setInterval} or `window.setInterval`.\n   *\n   * @return {number}\n   *         Returns the interval id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n   */\n\n\n  Component.prototype.clearInterval = function clearInterval(intervalId) {\n    window.clearInterval(intervalId);\n\n    var disposeFn = function disposeFn() {};\n\n    disposeFn.guid = 'vjs-interval-' + intervalId;\n\n    this.off('dispose', disposeFn);\n\n    return intervalId;\n  };\n\n  /**\n   * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n   * with a few extra bonuses:\n   *\n   * - Supports browsers that do not support rAF by falling back to\n   *   {@link Component#setTimeout}.\n   *\n   * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n   *   bound to the component).\n   *\n   * - Automatic cancellation of the rAF callback is handled if the component\n   *   is disposed before it is called.\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   *\n   * @return {number}\n   *         Returns an rAF ID that gets used to identify the timeout. It can\n   *         also be used in {@link Component#cancelAnimationFrame} to cancel\n   *         the animation frame callback.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n   */\n\n\n  Component.prototype.requestAnimationFrame = function requestAnimationFrame(fn) {\n    var _this4 = this;\n\n    // declare as variables so they are properly available in rAF function\n    // eslint-disable-next-line\n    var id, disposeFn;\n\n    if (this.supportsRaf_) {\n      fn = bind(this, fn);\n\n      id = window.requestAnimationFrame(function () {\n        _this4.off('dispose', disposeFn);\n        fn();\n      });\n\n      disposeFn = function disposeFn() {\n        return _this4.cancelAnimationFrame(id);\n      };\n\n      disposeFn.guid = 'vjs-raf-' + id;\n      this.on('dispose', disposeFn);\n\n      return id;\n    }\n\n    // Fall back to using a timer.\n    return this.setTimeout(fn, 1000 / 60);\n  };\n\n  /**\n   * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n   * (rAF).\n   *\n   * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n   * use this function instead of `window.cancelAnimationFrame`. If you don't,\n   * your dispose listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} id\n   *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n   *\n   * @return {number}\n   *         Returns the rAF ID that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n   */\n\n\n  Component.prototype.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    if (this.supportsRaf_) {\n      window.cancelAnimationFrame(id);\n\n      var disposeFn = function disposeFn() {};\n\n      disposeFn.guid = 'vjs-raf-' + id;\n\n      this.off('dispose', disposeFn);\n\n      return id;\n    }\n\n    // Fall back to using a timer.\n    return this.clearTimeout(id);\n  };\n\n  /**\n   * Register a `Component` with `videojs` given the name and the component.\n   *\n   * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n   *         should be registered using {@link Tech.registerTech} or\n   *         {@link videojs:videojs.registerTech}.\n   *\n   * > NOTE: This function can also be seen on videojs as\n   *         {@link videojs:videojs.registerComponent}.\n   *\n   * @param {string} name\n   *        The name of the `Component` to register.\n   *\n   * @param {Component} ComponentToRegister\n   *        The `Component` class to register.\n   *\n   * @return {Component}\n   *         The `Component` that was registered.\n   */\n\n\n  Component.registerComponent = function registerComponent(name, ComponentToRegister) {\n    if (typeof name !== 'string' || !name) {\n      throw new Error('Illegal component name, \"' + name + '\"; must be a non-empty string.');\n    }\n\n    var Tech = Component.getComponent('Tech');\n\n    // We need to make sure this check is only done if Tech has been registered.\n    var isTech = Tech && Tech.isTech(ComponentToRegister);\n    var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);\n\n    if (isTech || !isComp) {\n      var reason = void 0;\n\n      if (isTech) {\n        reason = 'techs must be registered using Tech.registerTech()';\n      } else {\n        reason = 'must be a Component subclass';\n      }\n\n      throw new Error('Illegal component, \"' + name + '\"; ' + reason + '.');\n    }\n\n    name = toTitleCase(name);\n\n    if (!Component.components_) {\n      Component.components_ = {};\n    }\n\n    var Player = Component.getComponent('Player');\n\n    if (name === 'Player' && Player && Player.players) {\n      var players = Player.players;\n      var playerNames = Object.keys(players);\n\n      // If we have players that were disposed, then their name will still be\n      // in Players.players. So, we must loop through and verify that the value\n      // for each item is not null. This allows registration of the Player component\n      // after all players have been disposed or before any were created.\n      if (players && playerNames.length > 0 && playerNames.map(function (pname) {\n        return players[pname];\n      }).every(Boolean)) {\n        throw new Error('Can not register Player component after player has been created.');\n      }\n    }\n\n    Component.components_[name] = ComponentToRegister;\n\n    return ComponentToRegister;\n  };\n\n  /**\n   * Get a `Component` based on the name it was registered with.\n   *\n   * @param {string} name\n   *        The Name of the component to get.\n   *\n   * @return {Component}\n   *         The `Component` that got registered under the given name.\n   *\n   * @deprecated In `videojs` 6 this will not return `Component`s that were not\n   *             registered using {@link Component.registerComponent}. Currently we\n   *             check the global `videojs` object for a `Component` name and\n   *             return that if it exists.\n   */\n\n\n  Component.getComponent = function getComponent(name) {\n    if (!name) {\n      return;\n    }\n\n    name = toTitleCase(name);\n\n    if (Component.components_ && Component.components_[name]) {\n      return Component.components_[name];\n    }\n  };\n\n  return Component;\n}();\n\n/**\n * Whether or not this component supports `requestAnimationFrame`.\n *\n * This is exposed primarily for testing purposes.\n *\n * @private\n * @type {Boolean}\n */\n\n\nComponent.prototype.supportsRaf_ = typeof window.requestAnimationFrame === 'function' && typeof window.cancelAnimationFrame === 'function';\n\nComponent.registerComponent('Component', Component);\n\n/**\n * @file time-ranges.js\n * @module time-ranges\n */\n\n/**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @function time-ranges:indexFunction\n *\n * @param {number} [index=0]\n *        The range number to return the time for.\n *\n * @return {number}\n *         The time that offset at the specified index.\n *\n * @depricated index must be set to a value, in the future this will throw an error.\n */\n\n/**\n * An object that contains ranges of time for various reasons.\n *\n * @typedef {Object} TimeRange\n *\n * @property {number} length\n *           The number of time ranges represented by this Object\n *\n * @property {time-ranges:indexFunction} start\n *           Returns the time offset at which a specified time range begins.\n *\n * @property {time-ranges:indexFunction} end\n *           Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n/**\n * Check if any of the time ranges are over the maximum index.\n *\n * @param {string} fnName\n *        The function name to use for logging\n *\n * @param {number} index\n *        The index to check\n *\n * @param {number} maxIndex\n *        The maximum possible index\n *\n * @throws {Error} if the timeRanges provided are over the maxIndex\n */\nfunction rangeCheck(fnName, index, maxIndex) {\n  if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n    throw new Error('Failed to execute \\'' + fnName + '\\' on \\'TimeRanges\\': The index provided (' + index + ') is non-numeric or out of bounds (0-' + maxIndex + ').');\n  }\n}\n\n/**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @param {string} fnName\n *        The function name to use for logging\n *\n * @param {string} valueIndex\n *        The proprety that should be used to get the time. should be 'start' or 'end'\n *\n * @param {Array} ranges\n *        An array of time ranges\n *\n * @param {Array} [rangeIndex=0]\n *        The index to start the search at\n *\n * @return {number}\n *         The time that offset at the specified index.\n *\n *\n * @depricated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws {Error} if rangeIndex is more than the length of ranges\n */\nfunction getRange(fnName, valueIndex, ranges, rangeIndex) {\n  rangeCheck(fnName, rangeIndex, ranges.length - 1);\n  return ranges[rangeIndex][valueIndex];\n}\n\n/**\n * Create a time range object given ranges of time.\n *\n * @param {Array} [ranges]\n *        An array of time ranges.\n */\nfunction createTimeRangesObj(ranges) {\n  if (ranges === undefined || ranges.length === 0) {\n    return {\n      length: 0,\n      start: function start() {\n        throw new Error('This TimeRanges object is empty');\n      },\n      end: function end() {\n        throw new Error('This TimeRanges object is empty');\n      }\n    };\n  }\n  return {\n    length: ranges.length,\n    start: getRange.bind(null, 'start', 0, ranges),\n    end: getRange.bind(null, 'end', 1, ranges)\n  };\n}\n\n/**\n * Should create a fake `TimeRange` object which mimics an HTML5 time range instance.\n *\n * @param {number|Array} start\n *        The start of a single range or an array of ranges\n *\n * @param {number} end\n *        The end of a single range.\n *\n * @private\n */\nfunction createTimeRanges(start, end) {\n  if (Array.isArray(start)) {\n    return createTimeRangesObj(start);\n  } else if (start === undefined || end === undefined) {\n    return createTimeRangesObj();\n  }\n  return createTimeRangesObj([[start, end]]);\n}\n\n/**\n * @file buffer.js\n * @module buffer\n */\n/**\n * Compute the percentage of the media that has been buffered.\n *\n * @param {TimeRange} buffered\n *        The current `TimeRange` object representing buffered time ranges\n *\n * @param {number} duration\n *        Total duration of the media\n *\n * @return {number}\n *         Percent buffered of the total duration in decimal form.\n */\nfunction bufferedPercent(buffered, duration) {\n  var bufferedDuration = 0;\n  var start = void 0;\n  var end = void 0;\n\n  if (!duration) {\n    return 0;\n  }\n\n  if (!buffered || !buffered.length) {\n    buffered = createTimeRanges(0, 0);\n  }\n\n  for (var i = 0; i < buffered.length; i++) {\n    start = buffered.start(i);\n    end = buffered.end(i);\n\n    // buffered end can be bigger than duration by a very small fraction\n    if (end > duration) {\n      end = duration;\n    }\n\n    bufferedDuration += end - start;\n  }\n\n  return bufferedDuration / duration;\n}\n\n/**\n * @file fullscreen-api.js\n * @module fullscreen-api\n * @private\n */\n/**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\nvar FullscreenApi = {};\n\n// browser API methods\nvar apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror'],\n// WebKit\n['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror'],\n// Old WebKit (Safari 5.1)\n['webkitRequestFullScreen', 'webkitCancelFullScreen', 'webkitCurrentFullScreenElement', 'webkitCancelFullScreen', 'webkitfullscreenchange', 'webkitfullscreenerror'],\n// Mozilla\n['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror'],\n// Microsoft\n['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError']];\n\nvar specApi = apiMap[0];\nvar browserApi = void 0;\n\n// determine the supported set of functions\nfor (var i = 0; i < apiMap.length; i++) {\n  // check for exitFullscreen function\n  if (apiMap[i][1] in document) {\n    browserApi = apiMap[i];\n    break;\n  }\n}\n\n// map the browser API names to the spec API names\nif (browserApi) {\n  for (var _i = 0; _i < browserApi.length; _i++) {\n    FullscreenApi[specApi[_i]] = browserApi[_i];\n  }\n}\n\n/**\n * @file media-error.js\n */\n/**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n *        This can be of multiple types:\n *        - number: should be a standard error code\n *        - string: an error message (the code will be 0)\n *        - Object: arbitrary properties\n *        - `MediaError` (native): used to populate a video.js `MediaError` object\n *        - `MediaError` (video.js): will return itself if it's already a\n *          video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\nfunction MediaError(value) {\n\n  // Allow redundant calls to this constructor to avoid having `instanceof`\n  // checks peppered around the code.\n  if (value instanceof MediaError) {\n    return value;\n  }\n\n  if (typeof value === 'number') {\n    this.code = value;\n  } else if (typeof value === 'string') {\n    // default code is zero, so this is a custom error\n    this.message = value;\n  } else if (isObject(value)) {\n\n    // We assign the `code` property manually because native `MediaError` objects\n    // do not expose it as an own/enumerable property of the object.\n    if (typeof value.code === 'number') {\n      this.code = value.code;\n    }\n\n    assign(this, value);\n  }\n\n  if (!this.message) {\n    this.message = MediaError.defaultMessages[this.code] || '';\n  }\n}\n\n/**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\nMediaError.prototype.code = 0;\n\n/**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\nMediaError.prototype.message = '';\n\n/**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\nMediaError.prototype.status = null;\n\n/**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_CUSTOM\n * @property {string} 2 - MEDIA_ERR_ABORTED\n * @property {string} 3 - MEDIA_ERR_NETWORK\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\nMediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n\n/**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\nMediaError.defaultMessages = {\n  1: 'You aborted the media playback',\n  2: 'A network error caused the media download to fail part-way.',\n  3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n  4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n  5: 'The media is encrypted and we do not have the keys to decrypt it.'\n};\n\n// Add types as properties on MediaError\n// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\nfor (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n  MediaError[MediaError.errorTypes[errNum]] = errNum;\n  // values should be accessible on both the class and instance\n  MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n}\n\n/**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param  {Object}  value\n *         An object that may or may not be `Promise`-like.\n *\n * @return {Boolean}\n *         Whether or not the object is `Promise`-like.\n */\nfunction isPromise(value) {\n  return value !== undefined && value !== null && typeof value.then === 'function';\n}\n\n/**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param  {Object} value\n *         An object that may or may not be `Promise`-like.\n */\nfunction silencePromise(value) {\n  if (isPromise(value)) {\n    value.then(null, function (e) {});\n  }\n}\n\n/**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n/**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n *        The text track to query.\n *\n * @return {Object}\n *         A serializable javascript representation of the TextTrack.\n * @private\n */\nvar trackToJson_ = function trackToJson_(track) {\n  var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {\n\n    if (track[prop]) {\n      acc[prop] = track[prop];\n    }\n\n    return acc;\n  }, {\n    cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n      return {\n        startTime: cue.startTime,\n        endTime: cue.endTime,\n        text: cue.text,\n        id: cue.id\n      };\n    })\n  });\n\n  return ret;\n};\n\n/**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param {Tech} tech\n *        The tech object to query\n *\n * @return {Array}\n *         A serializable javascript representation of the {@link Tech}s\n *         {@link TextTrackList}.\n */\nvar textTracksToJson = function textTracksToJson(tech) {\n\n  var trackEls = tech.$$('track');\n\n  var trackObjs = Array.prototype.map.call(trackEls, function (t) {\n    return t.track;\n  });\n  var tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n    var json = trackToJson_(trackEl.track);\n\n    if (trackEl.src) {\n      json.src = trackEl.src;\n    }\n    return json;\n  });\n\n  return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n    return trackObjs.indexOf(track) === -1;\n  }).map(trackToJson_));\n};\n\n/**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n *        An array of `TextTrack` representation objects, like those that would be\n *        produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n *        The `Tech` to create the `TextTrack`s on.\n */\nvar jsonToTextTracks = function jsonToTextTracks(json, tech) {\n  json.forEach(function (track) {\n    var addedTrack = tech.addRemoteTextTrack(track).track;\n\n    if (!track.src && track.cues) {\n      track.cues.forEach(function (cue) {\n        return addedTrack.addCue(cue);\n      });\n    }\n  });\n\n  return tech.textTracks();\n};\n\nvar textTrackConverter = { textTracksToJson: textTracksToJson, jsonToTextTracks: jsonToTextTracks, trackToJson_: trackToJson_ };\n\n/**\n * @file modal-dialog.js\n */\nvar MODAL_CLASS_NAME = 'vjs-modal-dialog';\nvar ESC = 27;\n\n/**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n\nvar ModalDialog = function (_Component) {\n  inherits(ModalDialog, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Mixed} [options.content=undefined]\n   *        Provide customized content for this modal.\n   *\n   * @param {string} [options.description]\n   *        A text description for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.fillAlways=false]\n   *        Normally, modals are automatically filled only the first time\n   *        they open. This tells the modal to refresh its content\n   *        every time it opens.\n   *\n   * @param {string} [options.label]\n   *        A text label for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.temporary=true]\n   *        If `true`, the modal can only be opened once; it will be\n   *        disposed as soon as it's closed.\n   *\n   * @param {boolean} [options.uncloseable=false]\n   *        If `true`, the user will not be able to close the modal\n   *        through the UI in the normal ways. Programmatic closing is\n   *        still possible.\n   */\n  function ModalDialog(player, options) {\n    classCallCheck(this, ModalDialog);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;\n\n    _this.closeable(!_this.options_.uncloseable);\n    _this.content(_this.options_.content);\n\n    // Make sure the contentEl is defined AFTER any children are initialized\n    // because we only want the contents of the modal in the contentEl\n    // (not the UI elements like the close button).\n    _this.contentEl_ = createEl('div', {\n      className: MODAL_CLASS_NAME + '-content'\n    }, {\n      role: 'document'\n    });\n\n    _this.descEl_ = createEl('p', {\n      className: MODAL_CLASS_NAME + '-description vjs-control-text',\n      id: _this.el().getAttribute('aria-describedby')\n    });\n\n    textContent(_this.descEl_, _this.description());\n    _this.el_.appendChild(_this.descEl_);\n    _this.el_.appendChild(_this.contentEl_);\n    return _this;\n  }\n\n  /**\n   * Create the `ModalDialog`'s DOM element\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  ModalDialog.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      tabIndex: -1\n    }, {\n      'aria-describedby': this.id() + '_description',\n      'aria-hidden': 'true',\n      'aria-label': this.label(),\n      'role': 'dialog'\n    });\n  };\n\n  ModalDialog.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.descEl_ = null;\n    this.previouslyActiveEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  ModalDialog.prototype.buildCSSClass = function buildCSSClass() {\n    return MODAL_CLASS_NAME + ' vjs-hidden ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Handles `keydown` events on the document, looking for ESC, which closes\n   * the modal.\n   *\n   * @param {EventTarget~Event} e\n   *        The keypress that triggered this event.\n   *\n   * @listens keydown\n   */\n\n\n  ModalDialog.prototype.handleKeyPress = function handleKeyPress(e) {\n    if (e.which === ESC && this.closeable()) {\n      this.close();\n    }\n  };\n\n  /**\n   * Returns the label string for this modal. Primarily used for accessibility.\n   *\n   * @return {string}\n   *         the localized or raw label of this modal.\n   */\n\n\n  ModalDialog.prototype.label = function label() {\n    return this.localize(this.options_.label || 'Modal Window');\n  };\n\n  /**\n   * Returns the description string for this modal. Primarily used for\n   * accessibility.\n   *\n   * @return {string}\n   *         The localized or raw description of this modal.\n   */\n\n\n  ModalDialog.prototype.description = function description() {\n    var desc = this.options_.description || this.localize('This is a modal window.');\n\n    // Append a universal closeability message if the modal is closeable.\n    if (this.closeable()) {\n      desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n    }\n\n    return desc;\n  };\n\n  /**\n   * Opens the modal.\n   *\n   * @fires ModalDialog#beforemodalopen\n   * @fires ModalDialog#modalopen\n   */\n\n\n  ModalDialog.prototype.open = function open() {\n    if (!this.opened_) {\n      var player = this.player();\n\n      /**\n        * Fired just before a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#beforemodalopen\n        * @type {EventTarget~Event}\n        */\n      this.trigger('beforemodalopen');\n      this.opened_ = true;\n\n      // Fill content if the modal has never opened before and\n      // never been filled.\n      if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n        this.fill();\n      }\n\n      // If the player was playing, pause it and take note of its previously\n      // playing state.\n      this.wasPlaying_ = !player.paused();\n\n      if (this.options_.pauseOnOpen && this.wasPlaying_) {\n        player.pause();\n      }\n\n      if (this.closeable()) {\n        this.on(this.el_.ownerDocument, 'keydown', bind(this, this.handleKeyPress));\n      }\n\n      // Hide controls and note if they were enabled.\n      this.hadControls_ = player.controls();\n      player.controls(false);\n\n      this.show();\n      this.conditionalFocus_();\n      this.el().setAttribute('aria-hidden', 'false');\n\n      /**\n        * Fired just after a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#modalopen\n        * @type {EventTarget~Event}\n        */\n      this.trigger('modalopen');\n      this.hasBeenOpened_ = true;\n    }\n  };\n\n  /**\n   * If the `ModalDialog` is currently open or closed.\n   *\n   * @param  {boolean} [value]\n   *         If given, it will open (`true`) or close (`false`) the modal.\n   *\n   * @return {boolean}\n   *         the current open state of the modaldialog\n   */\n\n\n  ModalDialog.prototype.opened = function opened(value) {\n    if (typeof value === 'boolean') {\n      this[value ? 'open' : 'close']();\n    }\n    return this.opened_;\n  };\n\n  /**\n   * Closes the modal, does nothing if the `ModalDialog` is\n   * not open.\n   *\n   * @fires ModalDialog#beforemodalclose\n   * @fires ModalDialog#modalclose\n   */\n\n\n  ModalDialog.prototype.close = function close() {\n    if (!this.opened_) {\n      return;\n    }\n    var player = this.player();\n\n    /**\n      * Fired just before a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#beforemodalclose\n      * @type {EventTarget~Event}\n      */\n    this.trigger('beforemodalclose');\n    this.opened_ = false;\n\n    if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n      player.play();\n    }\n\n    if (this.closeable()) {\n      this.off(this.el_.ownerDocument, 'keydown', bind(this, this.handleKeyPress));\n    }\n\n    if (this.hadControls_) {\n      player.controls(true);\n    }\n\n    this.hide();\n    this.el().setAttribute('aria-hidden', 'true');\n\n    /**\n      * Fired just after a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#modalclose\n      * @type {EventTarget~Event}\n      */\n    this.trigger('modalclose');\n    this.conditionalBlur_();\n\n    if (this.options_.temporary) {\n      this.dispose();\n    }\n  };\n\n  /**\n   * Check to see if the `ModalDialog` is closeable via the UI.\n   *\n   * @param  {boolean} [value]\n   *         If given as a boolean, it will set the `closeable` option.\n   *\n   * @return {boolean}\n   *         Returns the final value of the closable option.\n   */\n\n\n  ModalDialog.prototype.closeable = function closeable(value) {\n    if (typeof value === 'boolean') {\n      var closeable = this.closeable_ = !!value;\n      var close = this.getChild('closeButton');\n\n      // If this is being made closeable and has no close button, add one.\n      if (closeable && !close) {\n\n        // The close button should be a child of the modal - not its\n        // content element, so temporarily change the content element.\n        var temp = this.contentEl_;\n\n        this.contentEl_ = this.el_;\n        close = this.addChild('closeButton', { controlText: 'Close Modal Dialog' });\n        this.contentEl_ = temp;\n        this.on(close, 'close', this.close);\n      }\n\n      // If this is being made uncloseable and has a close button, remove it.\n      if (!closeable && close) {\n        this.off(close, 'close', this.close);\n        this.removeChild(close);\n        close.dispose();\n      }\n    }\n    return this.closeable_;\n  };\n\n  /**\n   * Fill the modal's content element with the modal's \"content\" option.\n   * The content element will be emptied before this change takes place.\n   */\n\n\n  ModalDialog.prototype.fill = function fill() {\n    this.fillWith(this.content());\n  };\n\n  /**\n   * Fill the modal's content element with arbitrary content.\n   * The content element will be emptied before this change takes place.\n   *\n   * @fires ModalDialog#beforemodalfill\n   * @fires ModalDialog#modalfill\n   *\n   * @param {Mixed} [content]\n   *        The same rules apply to this as apply to the `content` option.\n   */\n\n\n  ModalDialog.prototype.fillWith = function fillWith(content) {\n    var contentEl = this.contentEl();\n    var parentEl = contentEl.parentNode;\n    var nextSiblingEl = contentEl.nextSibling;\n\n    /**\n     * Fired just before a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#beforemodalfill\n     * @type {EventTarget~Event}\n     */\n    this.trigger('beforemodalfill');\n    this.hasBeenFilled_ = true;\n\n    // Detach the content element from the DOM before performing\n    // manipulation to avoid modifying the live DOM multiple times.\n    parentEl.removeChild(contentEl);\n    this.empty();\n    insertContent(contentEl, content);\n    /**\n     * Fired just after a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#modalfill\n     * @type {EventTarget~Event}\n     */\n    this.trigger('modalfill');\n\n    // Re-inject the re-filled content element.\n    if (nextSiblingEl) {\n      parentEl.insertBefore(contentEl, nextSiblingEl);\n    } else {\n      parentEl.appendChild(contentEl);\n    }\n\n    // make sure that the close button is last in the dialog DOM\n    var closeButton = this.getChild('closeButton');\n\n    if (closeButton) {\n      parentEl.appendChild(closeButton.el_);\n    }\n  };\n\n  /**\n   * Empties the content element. This happens anytime the modal is filled.\n   *\n   * @fires ModalDialog#beforemodalempty\n   * @fires ModalDialog#modalempty\n   */\n\n\n  ModalDialog.prototype.empty = function empty() {\n    /**\n     * Fired just before a `ModalDialog` is emptied.\n     *\n     * @event ModalDialog#beforemodalempty\n     * @type {EventTarget~Event}\n     */\n    this.trigger('beforemodalempty');\n    emptyEl(this.contentEl());\n\n    /**\n     * Fired just after a `ModalDialog` is emptied.\n     *\n     * @event ModalDialog#modalempty\n     * @type {EventTarget~Event}\n     */\n    this.trigger('modalempty');\n  };\n\n  /**\n   * Gets or sets the modal content, which gets normalized before being\n   * rendered into the DOM.\n   *\n   * This does not update the DOM or fill the modal, but it is called during\n   * that process.\n   *\n   * @param  {Mixed} [value]\n   *         If defined, sets the internal content value to be used on the\n   *         next call(s) to `fill`. This value is normalized before being\n   *         inserted. To \"clear\" the internal content value, pass `null`.\n   *\n   * @return {Mixed}\n   *         The current content of the modal dialog\n   */\n\n\n  ModalDialog.prototype.content = function content(value) {\n    if (typeof value !== 'undefined') {\n      this.content_ = value;\n    }\n    return this.content_;\n  };\n\n  /**\n   * conditionally focus the modal dialog if focus was previously on the player.\n   *\n   * @private\n   */\n\n\n  ModalDialog.prototype.conditionalFocus_ = function conditionalFocus_() {\n    var activeEl = document.activeElement;\n    var playerEl = this.player_.el_;\n\n    this.previouslyActiveEl_ = null;\n\n    if (playerEl.contains(activeEl) || playerEl === activeEl) {\n      this.previouslyActiveEl_ = activeEl;\n\n      this.focus();\n\n      this.on(document, 'keydown', this.handleKeyDown);\n    }\n  };\n\n  /**\n   * conditionally blur the element and refocus the last focused element\n   *\n   * @private\n   */\n\n\n  ModalDialog.prototype.conditionalBlur_ = function conditionalBlur_() {\n    if (this.previouslyActiveEl_) {\n      this.previouslyActiveEl_.focus();\n      this.previouslyActiveEl_ = null;\n    }\n\n    this.off(document, 'keydown', this.handleKeyDown);\n  };\n\n  /**\n   * Keydown handler. Attached when modal is focused.\n   *\n   * @listens keydown\n   */\n\n\n  ModalDialog.prototype.handleKeyDown = function handleKeyDown(event) {\n    // exit early if it isn't a tab key\n    if (event.which !== 9) {\n      return;\n    }\n\n    var focusableEls = this.focusableEls_();\n    var activeEl = this.el_.querySelector(':focus');\n    var focusIndex = void 0;\n\n    for (var i = 0; i < focusableEls.length; i++) {\n      if (activeEl === focusableEls[i]) {\n        focusIndex = i;\n        break;\n      }\n    }\n\n    if (document.activeElement === this.el_) {\n      focusIndex = 0;\n    }\n\n    if (event.shiftKey && focusIndex === 0) {\n      focusableEls[focusableEls.length - 1].focus();\n      event.preventDefault();\n    } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n      focusableEls[0].focus();\n      event.preventDefault();\n    }\n  };\n\n  /**\n   * get all focusable elements\n   *\n   * @private\n   */\n\n\n  ModalDialog.prototype.focusableEls_ = function focusableEls_() {\n    var allChildren = this.el_.querySelectorAll('*');\n\n    return Array.prototype.filter.call(allChildren, function (child) {\n      return (child instanceof window.HTMLAnchorElement || child instanceof window.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window.HTMLInputElement || child instanceof window.HTMLSelectElement || child instanceof window.HTMLTextAreaElement || child instanceof window.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window.HTMLIFrameElement || child instanceof window.HTMLObjectElement || child instanceof window.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n    });\n  };\n\n  return ModalDialog;\n}(Component);\n\n/**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n\n\nModalDialog.prototype.options_ = {\n  pauseOnOpen: true,\n  temporary: true\n};\n\nComponent.registerComponent('ModalDialog', ModalDialog);\n\n/**\n * @file track-list.js\n */\n/**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n\nvar TrackList = function (_EventTarget) {\n  inherits(TrackList, _EventTarget);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Track[]} tracks\n   *        A list of tracks to initialize the list with.\n   *\n   * @param {Object} [list]\n   *        The child object with inheritance done manually for ie8.\n   *\n   * @abstract\n   */\n  function TrackList() {\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n\n    var _ret;\n\n    var list = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;\n    classCallCheck(this, TrackList);\n\n    var _this = possibleConstructorReturn(this, _EventTarget.call(this));\n\n    if (!list) {\n      list = _this; // eslint-disable-line\n      if (IS_IE8) {\n        list = document.createElement('custom');\n        for (var prop in TrackList.prototype) {\n          if (prop !== 'constructor') {\n            list[prop] = TrackList.prototype[prop];\n          }\n        }\n      }\n    }\n\n    list.tracks_ = [];\n\n    /**\n     * @memberof TrackList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n    Object.defineProperty(list, 'length', {\n      get: function get$$1() {\n        return this.tracks_.length;\n      }\n    });\n\n    for (var i = 0; i < tracks.length; i++) {\n      list.addTrack(tracks[i]);\n    }\n\n    // must return the object, as for ie8 it will not be this\n    // but a reference to a document object\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a {@link Track} to the `TrackList`\n   *\n   * @param {Track} track\n   *        The audio, video, or text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  TrackList.prototype.addTrack = function addTrack(track) {\n    var index = this.tracks_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get$$1() {\n          return this.tracks_[index];\n        }\n      });\n    }\n\n    // Do not add duplicate tracks\n    if (this.tracks_.indexOf(track) === -1) {\n      this.tracks_.push(track);\n      /**\n       * Triggered when a track is added to a track list.\n       *\n       * @event TrackList#addtrack\n       * @type {EventTarget~Event}\n       * @property {Track} track\n       *           A reference to track that was added.\n       */\n      this.trigger({\n        track: track,\n        type: 'addtrack'\n      });\n    }\n  };\n\n  /**\n   * Remove a {@link Track} from the `TrackList`\n   *\n   * @param {Track} rtrack\n   *        The audio, video, or text track to remove from the list.\n   *\n   * @fires TrackList#removetrack\n   */\n\n\n  TrackList.prototype.removeTrack = function removeTrack(rtrack) {\n    var track = void 0;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      if (this[i] === rtrack) {\n        track = this[i];\n        if (track.off) {\n          track.off();\n        }\n\n        this.tracks_.splice(i, 1);\n\n        break;\n      }\n    }\n\n    if (!track) {\n      return;\n    }\n\n    /**\n     * Triggered when a track is removed from track list.\n     *\n     * @event TrackList#removetrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was removed.\n     */\n    this.trigger({\n      track: track,\n      type: 'removetrack'\n    });\n  };\n\n  /**\n   * Get a Track from the TrackList by a tracks id\n   *\n   * @param {String} id - the id of the track to get\n   * @method getTrackById\n   * @return {Track}\n   * @private\n   */\n\n\n  TrackList.prototype.getTrackById = function getTrackById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var track = this[i];\n\n      if (track.id === id) {\n        result = track;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TrackList;\n}(EventTarget);\n\n/**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {EventTarget~Event}\n */\n\n/**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n\n\nTrackList.prototype.allowedEvents_ = {\n  change: 'change',\n  addtrack: 'addtrack',\n  removetrack: 'removetrack'\n};\n\n// emulate attribute EventHandler support to allow for feature detection\nfor (var event in TrackList.prototype.allowedEvents_) {\n  TrackList.prototype['on' + event] = null;\n}\n\n/**\n * @file audio-track-list.js\n */\n/**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n *        list to work on\n *\n * @param {AudioTrack} track\n *        The track to skip\n *\n * @private\n */\nvar disableOthers = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    }\n    // another audio track is enabled, disable it\n    list[i].enabled = false;\n  }\n};\n\n/**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n\nvar AudioTrackList = function (_TrackList) {\n  inherits(AudioTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {AudioTrack[]} [tracks=[]]\n   *        A list of `AudioTrack` to instantiate the list with.\n   */\n  function AudioTrackList() {\n    var _this, _ret;\n\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, AudioTrackList);\n\n    var list = void 0;\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].enabled) {\n        disableOthers(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    // IE8 forces us to implement inheritance ourselves\n    // as it does not support Object.defineProperty properly\n    if (IS_IE8) {\n      list = document.createElement('custom');\n      for (var prop in TrackList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TrackList.prototype[prop];\n        }\n      }\n      for (var _prop in AudioTrackList.prototype) {\n        if (_prop !== 'constructor') {\n          list[_prop] = AudioTrackList.prototype[_prop];\n        }\n      }\n    }\n\n    list = (_this = possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);\n    list.changing_ = false;\n\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add an {@link AudioTrack} to the `AudioTrackList`.\n   *\n   * @param {AudioTrack} track\n   *        The AudioTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  AudioTrackList.prototype.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.enabled) {\n      disableOthers(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track);\n    // native tracks don't have this\n    if (!track.addEventListener) {\n      return;\n    }\n\n    /**\n     * @listens AudioTrack#enabledchange\n     * @fires TrackList#change\n     */\n    track.addEventListener('enabledchange', function () {\n      // when we are disabling other tracks (since we don't support\n      // more than one track at a time) we will set changing_\n      // to true so that we don't trigger additional change events\n      if (_this2.changing_) {\n        return;\n      }\n      _this2.changing_ = true;\n      disableOthers(_this2, track);\n      _this2.changing_ = false;\n      _this2.trigger('change');\n    });\n  };\n\n  return AudioTrackList;\n}(TrackList);\n\n/**\n * @file video-track-list.js\n */\n/**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n *        list to work on\n *\n * @param {VideoTrack} track\n *        The track to skip\n *\n * @private\n */\nvar disableOthers$1 = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    }\n    // another video track is enabled, disable it\n    list[i].selected = false;\n  }\n};\n\n/**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n\nvar VideoTrackList = function (_TrackList) {\n  inherits(VideoTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {VideoTrack[]} [tracks=[]]\n   *        A list of `VideoTrack` to instantiate the list with.\n   */\n  function VideoTrackList() {\n    var _this, _ret;\n\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, VideoTrackList);\n\n    var list = void 0;\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].selected) {\n        disableOthers$1(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    // IE8 forces us to implement inheritance ourselves\n    // as it does not support Object.defineProperty properly\n    if (IS_IE8) {\n      list = document.createElement('custom');\n      for (var prop in TrackList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TrackList.prototype[prop];\n        }\n      }\n      for (var _prop in VideoTrackList.prototype) {\n        if (_prop !== 'constructor') {\n          list[_prop] = VideoTrackList.prototype[_prop];\n        }\n      }\n    }\n\n    list = (_this = possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);\n    list.changing_ = false;\n\n    /**\n     * @member {number} VideoTrackList#selectedIndex\n     *         The current index of the selected {@link VideoTrack`}.\n     */\n    Object.defineProperty(list, 'selectedIndex', {\n      get: function get$$1() {\n        for (var _i = 0; _i < this.length; _i++) {\n          if (this[_i].selected) {\n            return _i;\n          }\n        }\n        return -1;\n      },\n      set: function set$$1() {}\n    });\n\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a {@link VideoTrack} to the `VideoTrackList`.\n   *\n   * @param {VideoTrack} track\n   *        The VideoTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  VideoTrackList.prototype.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.selected) {\n      disableOthers$1(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track);\n    // native tracks don't have this\n    if (!track.addEventListener) {\n      return;\n    }\n\n    /**\n     * @listens VideoTrack#selectedchange\n     * @fires TrackList#change\n     */\n    track.addEventListener('selectedchange', function () {\n      if (_this2.changing_) {\n        return;\n      }\n      _this2.changing_ = true;\n      disableOthers$1(_this2, track);\n      _this2.changing_ = false;\n      _this2.trigger('change');\n    });\n  };\n\n  return VideoTrackList;\n}(TrackList);\n\n/**\n * @file text-track-list.js\n */\n/**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n\nvar TextTrackList = function (_TrackList) {\n  inherits(TextTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {TextTrack[]} [tracks=[]]\n   *        A list of `TextTrack` to instantiate the list with.\n   */\n  function TextTrackList() {\n    var _this, _ret;\n\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, TextTrackList);\n\n    var list = void 0;\n\n    // IE8 forces us to implement inheritance ourselves\n    // as it does not support Object.defineProperty properly\n    if (IS_IE8) {\n      list = document.createElement('custom');\n      for (var prop in TrackList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TrackList.prototype[prop];\n        }\n      }\n      for (var _prop in TextTrackList.prototype) {\n        if (_prop !== 'constructor') {\n          list[_prop] = TextTrackList.prototype[_prop];\n        }\n      }\n    }\n\n    list = (_this = possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a {@link TextTrack} to the `TextTrackList`\n   *\n   * @param {TextTrack} track\n   *        The text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  TextTrackList.prototype.addTrack = function addTrack(track) {\n    _TrackList.prototype.addTrack.call(this, track);\n\n    /**\n     * @listens TextTrack#modechange\n     * @fires TrackList#change\n     */\n    track.addEventListener('modechange', bind(this, function () {\n      this.trigger('change');\n    }));\n\n    var nonLanguageTextTrackKind = ['metadata', 'chapters'];\n\n    if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n      track.addEventListener('modechange', bind(this, function () {\n        this.trigger('selectedlanguagechange');\n      }));\n    }\n  };\n\n  return TextTrackList;\n}(TrackList);\n\n/**\n * @file html-track-element-list.js\n */\n\n/**\n * The current list of {@link HtmlTrackElement}s.\n */\n\nvar HtmlTrackElementList = function () {\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {HtmlTrackElement[]} [tracks=[]]\n   *        A list of `HtmlTrackElement` to instantiate the list with.\n   */\n  function HtmlTrackElementList() {\n    var trackElements = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, HtmlTrackElementList);\n\n    var list = this; // eslint-disable-line\n\n    if (IS_IE8) {\n      list = document.createElement('custom');\n\n      for (var prop in HtmlTrackElementList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = HtmlTrackElementList.prototype[prop];\n        }\n      }\n    }\n\n    list.trackElements_ = [];\n\n    /**\n     * @memberof HtmlTrackElementList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n    Object.defineProperty(list, 'length', {\n      get: function get$$1() {\n        return this.trackElements_.length;\n      }\n    });\n\n    for (var i = 0, length = trackElements.length; i < length; i++) {\n      list.addTrackElement_(trackElements[i]);\n    }\n\n    if (IS_IE8) {\n      return list;\n    }\n  }\n\n  /**\n   * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to add to the list.\n   *\n   * @private\n   */\n\n\n  HtmlTrackElementList.prototype.addTrackElement_ = function addTrackElement_(trackElement) {\n    var index = this.trackElements_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get$$1() {\n          return this.trackElements_[index];\n        }\n      });\n    }\n\n    // Do not add duplicate elements\n    if (this.trackElements_.indexOf(trackElement) === -1) {\n      this.trackElements_.push(trackElement);\n    }\n  };\n\n  /**\n   * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n   * {@link TextTrack}.\n   *\n   * @param {TextTrack} track\n   *        The track associated with a track element.\n   *\n   * @return {HtmlTrackElement|undefined}\n   *         The track element that was found or undefined.\n   *\n   * @private\n   */\n\n\n  HtmlTrackElementList.prototype.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {\n    var trackElement_ = void 0;\n\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (track === this.trackElements_[i].track) {\n        trackElement_ = this.trackElements_[i];\n\n        break;\n      }\n    }\n\n    return trackElement_;\n  };\n\n  /**\n   * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to remove from the list.\n   *\n   * @private\n   */\n\n\n  HtmlTrackElementList.prototype.removeTrackElement_ = function removeTrackElement_(trackElement) {\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (trackElement === this.trackElements_[i]) {\n        this.trackElements_.splice(i, 1);\n\n        break;\n      }\n    }\n  };\n\n  return HtmlTrackElementList;\n}();\n\n/**\n * @file text-track-cue-list.js\n */\n/**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n *           The unique id for this text track cue\n *\n * @property {number} startTime\n *           The start time for this text track cue\n *\n * @property {number} endTime\n *           The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n *           Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n/**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\n\nvar TextTrackCueList = function () {\n\n  /**\n   * Create an instance of this class..\n   *\n   * @param {Array} cues\n   *        A list of cues to be initialized with\n   */\n  function TextTrackCueList(cues) {\n    classCallCheck(this, TextTrackCueList);\n\n    var list = this; // eslint-disable-line\n\n    if (IS_IE8) {\n      list = document.createElement('custom');\n\n      for (var prop in TextTrackCueList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TextTrackCueList.prototype[prop];\n        }\n      }\n    }\n\n    TextTrackCueList.prototype.setCues_.call(list, cues);\n\n    /**\n     * @memberof TextTrackCueList\n     * @member {number} length\n     *         The current number of `TextTrackCue`s in the TextTrackCueList.\n     * @instance\n     */\n    Object.defineProperty(list, 'length', {\n      get: function get$$1() {\n        return this.length_;\n      }\n    });\n\n    if (IS_IE8) {\n      return list;\n    }\n  }\n\n  /**\n   * A setter for cues in this list. Creates getters\n   * an an index for the cues.\n   *\n   * @param {Array} cues\n   *        An array of cues to set\n   *\n   * @private\n   */\n\n\n  TextTrackCueList.prototype.setCues_ = function setCues_(cues) {\n    var oldLength = this.length || 0;\n    var i = 0;\n    var l = cues.length;\n\n    this.cues_ = cues;\n    this.length_ = cues.length;\n\n    var defineProp = function defineProp(index) {\n      if (!('' + index in this)) {\n        Object.defineProperty(this, '' + index, {\n          get: function get$$1() {\n            return this.cues_[index];\n          }\n        });\n      }\n    };\n\n    if (oldLength < l) {\n      i = oldLength;\n\n      for (; i < l; i++) {\n        defineProp.call(this, i);\n      }\n    }\n  };\n\n  /**\n   * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n   *\n   * @param {string} id\n   *        The id of the cue that should be searched for.\n   *\n   * @return {TextTrackCueList~TextTrackCue|null}\n   *         A single cue or null if none was found.\n   */\n\n\n  TextTrackCueList.prototype.getCueById = function getCueById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var cue = this[i];\n\n      if (cue.id === id) {\n        result = cue;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TextTrackCueList;\n}();\n\n/**\n * @file track-kinds.js\n */\n\n/**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\nvar VideoTrackKind = {\n  alternative: 'alternative',\n  captions: 'captions',\n  main: 'main',\n  sign: 'sign',\n  subtitles: 'subtitles',\n  commentary: 'commentary'\n};\n\n/**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\nvar AudioTrackKind = {\n  'alternative': 'alternative',\n  'descriptions': 'descriptions',\n  'main': 'main',\n  'main-desc': 'main-desc',\n  'translation': 'translation',\n  'commentary': 'commentary'\n};\n\n/**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\nvar TextTrackKind = {\n  subtitles: 'subtitles',\n  captions: 'captions',\n  descriptions: 'descriptions',\n  chapters: 'chapters',\n  metadata: 'metadata'\n};\n\n/**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\nvar TextTrackMode = {\n  disabled: 'disabled',\n  hidden: 'hidden',\n  showing: 'showing'\n};\n\n/**\n * @file track.js\n */\n/**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n\nvar Track = function (_EventTarget) {\n  inherits(Track, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid kind for the track type you are creating.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @abstract\n   */\n  function Track() {\n    var _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, Track);\n\n    var _this = possibleConstructorReturn(this, _EventTarget.call(this));\n\n    var track = _this; // eslint-disable-line\n\n    if (IS_IE8) {\n      track = document.createElement('custom');\n      for (var prop in Track.prototype) {\n        if (prop !== 'constructor') {\n          track[prop] = Track.prototype[prop];\n        }\n      }\n    }\n\n    var trackProps = {\n      id: options.id || 'vjs_track_' + newGUID(),\n      kind: options.kind || '',\n      label: options.label || '',\n      language: options.language || ''\n    };\n\n    /**\n     * @memberof Track\n     * @member {string} id\n     *         The id of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} kind\n     *         The kind of track that this is. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} label\n     *         The label of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} language\n     *         The two letter language code for this track. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    var _loop = function _loop(key) {\n      Object.defineProperty(track, key, {\n        get: function get$$1() {\n          return trackProps[key];\n        },\n        set: function set$$1() {}\n      });\n    };\n\n    for (var key in trackProps) {\n      _loop(key);\n    }\n\n    return _ret = track, possibleConstructorReturn(_this, _ret);\n  }\n\n  return Track;\n}(EventTarget);\n\n/**\n * @file url.js\n * @module url\n */\n/**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n *           The protocol of the url that was parsed.\n *\n * @property {string} hostname\n *           The hostname of the url that was parsed.\n *\n * @property {string} port\n *           The port of the url that was parsed.\n *\n * @property {string} pathname\n *           The pathname of the url that was parsed.\n *\n * @property {string} search\n *           The search query of the url that was parsed.\n *\n * @property {string} hash\n *           The hash of the url that was parsed.\n *\n * @property {string} host\n *           The host of the url that was parsed.\n */\n\n/**\n * Resolve and parse the elements of a URL.\n *\n * @param  {String} url\n *         The url to parse\n *\n * @return {url:URLObject}\n *         An object of url details\n */\nvar parseUrl = function parseUrl(url) {\n  var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host'];\n\n  // add the url to an anchor and let the browser parse the URL\n  var a = document.createElement('a');\n\n  a.href = url;\n\n  // IE8 (and 9?) Fix\n  // ie8 doesn't parse the URL correctly until the anchor is actually\n  // added to the body, and an innerHTML is needed to trigger the parsing\n  var addToBody = a.host === '' && a.protocol !== 'file:';\n  var div = void 0;\n\n  if (addToBody) {\n    div = document.createElement('div');\n    div.innerHTML = '<a href=\"' + url + '\"></a>';\n    a = div.firstChild;\n    // prevent the div from affecting layout\n    div.setAttribute('style', 'display:none; position:absolute;');\n    document.body.appendChild(div);\n  }\n\n  // Copy the specific URL properties to a new object\n  // This is also needed for IE8 because the anchor loses its\n  // properties when it's removed from the dom\n  var details = {};\n\n  for (var i = 0; i < props.length; i++) {\n    details[props[i]] = a[props[i]];\n  }\n\n  // IE9 adds the port to the host property unlike everyone else. If\n  // a port identifier is added for standard ports, strip it.\n  if (details.protocol === 'http:') {\n    details.host = details.host.replace(/:80$/, '');\n  }\n\n  if (details.protocol === 'https:') {\n    details.host = details.host.replace(/:443$/, '');\n  }\n\n  if (!details.protocol) {\n    details.protocol = window.location.protocol;\n  }\n\n  if (addToBody) {\n    document.body.removeChild(div);\n  }\n\n  return details;\n};\n\n/**\n * Get absolute version of relative URL. Used to tell flash correct URL.\n *\n *\n * @param  {string} url\n *         URL to make absolute\n *\n * @return {string}\n *         Absolute URL\n *\n * @see http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\nvar getAbsoluteURL = function getAbsoluteURL(url) {\n  // Check if absolute URL\n  if (!url.match(/^https?:\\/\\//)) {\n    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.\n    var div = document.createElement('div');\n\n    div.innerHTML = '<a href=\"' + url + '\">x</a>';\n    url = div.firstChild.href;\n  }\n\n  return url;\n};\n\n/**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @param {string} path\n *        The fileName path like '/path/to/file.mp4'\n *\n * @returns {string}\n *          The extension in lower case or an empty string if no\n *          extension could be found.\n */\nvar getFileExtension = function getFileExtension(path) {\n  if (typeof path === 'string') {\n    var splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/i;\n    var pathParts = splitPathRe.exec(path);\n\n    if (pathParts) {\n      return pathParts.pop().toLowerCase();\n    }\n  }\n\n  return '';\n};\n\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @param {string} url\n *        The url to check.\n *\n * @return {boolean}\n *         Whether it is a cross domain request or not.\n */\nvar isCrossOrigin = function isCrossOrigin(url) {\n  var winLoc = window.location;\n  var urlInfo = parseUrl(url);\n\n  // IE8 protocol relative urls will return ':' for protocol\n  var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol;\n\n  // Check if url is for another domain/origin\n  // IE8 doesn't know location.origin, so we won't rely on it here\n  var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n\n  return crossOrigin;\n};\n\nvar Url = (Object.freeze || Object)({\n\tparseUrl: parseUrl,\n\tgetAbsoluteURL: getAbsoluteURL,\n\tgetFileExtension: getFileExtension,\n\tisCrossOrigin: isCrossOrigin\n});\n\n/**\n * @file text-track.js\n */\n/**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n *        webVTT file contents\n *\n * @param {TextTrack} track\n *        TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\nvar parseCues = function parseCues(srcContent, track) {\n  var parser = new window.WebVTT.Parser(window, window.vttjs, window.WebVTT.StringDecoder());\n  var errors = [];\n\n  parser.oncue = function (cue) {\n    track.addCue(cue);\n  };\n\n  parser.onparsingerror = function (error) {\n    errors.push(error);\n  };\n\n  parser.onflush = function () {\n    track.trigger({\n      type: 'loadeddata',\n      target: track\n    });\n  };\n\n  parser.parse(srcContent);\n  if (errors.length > 0) {\n    if (window.console && window.console.groupCollapsed) {\n      window.console.groupCollapsed('Text Track parsing errors for ' + track.src);\n    }\n    errors.forEach(function (error) {\n      return log.error(error);\n    });\n    if (window.console && window.console.groupEnd) {\n      window.console.groupEnd();\n    }\n  }\n\n  parser.flush();\n};\n\n/**\n * Load a `TextTrack` from a specifed url.\n *\n * @param {string} src\n *        Url to load track from.\n *\n * @param {TextTrack} track\n *        Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\nvar loadTrack = function loadTrack(src, track) {\n  var opts = {\n    uri: src\n  };\n  var crossOrigin = isCrossOrigin(src);\n\n  if (crossOrigin) {\n    opts.cors = crossOrigin;\n  }\n\n  xhr(opts, bind(this, function (err, response, responseBody) {\n    if (err) {\n      return log.error(err, response);\n    }\n\n    track.loaded_ = true;\n\n    // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n    // NOTE: this is only used for the alt/video.novtt.js build\n    if (typeof window.WebVTT !== 'function') {\n      if (track.tech_) {\n        var loadHandler = function loadHandler() {\n          return parseCues(responseBody, track);\n        };\n\n        track.tech_.on('vttjsloaded', loadHandler);\n        track.tech_.on('vttjserror', function () {\n          log.error('vttjs failed to load, stopping trying to process ' + track.src);\n          track.tech_.off('vttjsloaded', loadHandler);\n        });\n      }\n    } else {\n      parseCues(responseBody, track);\n    }\n  }));\n};\n\n/**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n\nvar TextTrack = function (_Track) {\n  inherits(TextTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this TextTrack.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        vesion of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function TextTrack() {\n    var _this, _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, TextTrack);\n\n    if (!options.tech) {\n      throw new Error('A tech was not provided.');\n    }\n\n    var settings = mergeOptions(options, {\n      kind: TextTrackKind[options.kind] || 'subtitles',\n      language: options.language || options.srclang || ''\n    });\n    var mode = TextTrackMode[settings.mode] || 'disabled';\n    var default_ = settings['default'];\n\n    if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n      mode = 'hidden';\n    }\n    // on IE8 this will be a document element\n    // for every other browser this will be a normal object\n    var tt = (_this = possibleConstructorReturn(this, _Track.call(this, settings)), _this);\n\n    tt.tech_ = settings.tech;\n\n    if (IS_IE8) {\n      for (var prop in TextTrack.prototype) {\n        if (prop !== 'constructor') {\n          tt[prop] = TextTrack.prototype[prop];\n        }\n      }\n    }\n\n    tt.cues_ = [];\n    tt.activeCues_ = [];\n\n    var cues = new TextTrackCueList(tt.cues_);\n    var activeCues = new TextTrackCueList(tt.activeCues_);\n    var changed = false;\n    var timeupdateHandler = bind(tt, function () {\n\n      // Accessing this.activeCues for the side-effects of updating itself\n      // due to it's nature as a getter function. Do not remove or cues will\n      // stop updating!\n      // Use the setter to prevent deletion from uglify (pure_getters rule)\n      this.activeCues = this.activeCues;\n      if (changed) {\n        this.trigger('cuechange');\n        changed = false;\n      }\n    });\n\n    if (mode !== 'disabled') {\n      tt.tech_.ready(function () {\n        tt.tech_.on('timeupdate', timeupdateHandler);\n      }, true);\n    }\n\n    /**\n     * @memberof TextTrack\n     * @member {boolean} default\n     *         If this track was set to be on or off by default. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n    Object.defineProperty(tt, 'default', {\n      get: function get$$1() {\n        return default_;\n      },\n      set: function set$$1() {}\n    });\n\n    /**\n     * @memberof TextTrack\n     * @member {string} mode\n     *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n     *         not be set if setting to an invalid mode.\n     * @instance\n     *\n     * @fires TextTrack#modechange\n     */\n    Object.defineProperty(tt, 'mode', {\n      get: function get$$1() {\n        return mode;\n      },\n      set: function set$$1(newMode) {\n        var _this2 = this;\n\n        if (!TextTrackMode[newMode]) {\n          return;\n        }\n        mode = newMode;\n        if (mode !== 'disabled') {\n\n          this.tech_.ready(function () {\n            _this2.tech_.on('timeupdate', timeupdateHandler);\n          }, true);\n        } else {\n          this.tech_.off('timeupdate', timeupdateHandler);\n        }\n        /**\n         * An event that fires when mode changes on this track. This allows\n         * the TextTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec!\n         *\n         * @event TextTrack#modechange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('modechange');\n      }\n    });\n\n    /**\n     * @memberof TextTrack\n     * @member {TextTrackCueList} cues\n     *         The text track cue list for this TextTrack.\n     * @instance\n     */\n    Object.defineProperty(tt, 'cues', {\n      get: function get$$1() {\n        if (!this.loaded_) {\n          return null;\n        }\n\n        return cues;\n      },\n      set: function set$$1() {}\n    });\n\n    /**\n     * @memberof TextTrack\n     * @member {TextTrackCueList} activeCues\n     *         The list text track cues that are currently active for this TextTrack.\n     * @instance\n     */\n    Object.defineProperty(tt, 'activeCues', {\n      get: function get$$1() {\n        if (!this.loaded_) {\n          return null;\n        }\n\n        // nothing to do\n        if (this.cues.length === 0) {\n          return activeCues;\n        }\n\n        var ct = this.tech_.currentTime();\n        var active = [];\n\n        for (var i = 0, l = this.cues.length; i < l; i++) {\n          var cue = this.cues[i];\n\n          if (cue.startTime <= ct && cue.endTime >= ct) {\n            active.push(cue);\n          } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {\n            active.push(cue);\n          }\n        }\n\n        changed = false;\n\n        if (active.length !== this.activeCues_.length) {\n          changed = true;\n        } else {\n          for (var _i = 0; _i < active.length; _i++) {\n            if (this.activeCues_.indexOf(active[_i]) === -1) {\n              changed = true;\n            }\n          }\n        }\n\n        this.activeCues_ = active;\n        activeCues.setCues_(this.activeCues_);\n\n        return activeCues;\n      },\n\n\n      // /!\\ Keep this setter empty (see the timeupdate handler above)\n      set: function set$$1() {}\n    });\n\n    if (settings.src) {\n      tt.src = settings.src;\n      loadTrack(settings.src, tt);\n    } else {\n      tt.loaded_ = true;\n    }\n\n    return _ret = tt, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a cue to the internal list of cues.\n   *\n   * @param {TextTrack~Cue} cue\n   *        The cue to add to our internal list\n   */\n\n\n  TextTrack.prototype.addCue = function addCue(originalCue) {\n    var cue = originalCue;\n\n    if (window.vttjs && !(originalCue instanceof window.vttjs.VTTCue)) {\n      cue = new window.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n\n      for (var prop in originalCue) {\n        if (!(prop in cue)) {\n          cue[prop] = originalCue[prop];\n        }\n      }\n\n      // make sure that `id` is copied over\n      cue.id = originalCue.id;\n      cue.originalCue_ = originalCue;\n    }\n\n    var tracks = this.tech_.textTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      if (tracks[i] !== this) {\n        tracks[i].removeCue(cue);\n      }\n    }\n\n    this.cues_.push(cue);\n    this.cues.setCues_(this.cues_);\n  };\n\n  /**\n   * Remove a cue from our internal list\n   *\n   * @param {TextTrack~Cue} removeCue\n   *        The cue to remove from our internal list\n   */\n\n\n  TextTrack.prototype.removeCue = function removeCue(_removeCue) {\n    var i = this.cues_.length;\n\n    while (i--) {\n      var cue = this.cues_[i];\n\n      if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {\n        this.cues_.splice(i, 1);\n        this.cues.setCues_(this.cues_);\n        break;\n      }\n    }\n  };\n\n  return TextTrack;\n}(Track);\n\n/**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n\n\nTextTrack.prototype.allowedEvents_ = {\n  cuechange: 'cuechange'\n};\n\n/**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n\nvar AudioTrack = function (_Track) {\n  inherits(AudioTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {AudioTrack~Kind} [options.kind='']\n   *        A valid audio track kind\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.enabled]\n   *        If this track is the one that is currently playing. If this track is part of\n   *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n   */\n  function AudioTrack() {\n    var _this, _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, AudioTrack);\n\n    var settings = mergeOptions(options, {\n      kind: AudioTrackKind[options.kind] || ''\n    });\n    // on IE8 this will be a document element\n    // for every other browser this will be a normal object\n    var track = (_this = possibleConstructorReturn(this, _Track.call(this, settings)), _this);\n    var enabled = false;\n\n    if (IS_IE8) {\n      for (var prop in AudioTrack.prototype) {\n        if (prop !== 'constructor') {\n          track[prop] = AudioTrack.prototype[prop];\n        }\n      }\n    }\n    /**\n     * @memberof AudioTrack\n     * @member {boolean} enabled\n     *         If this `AudioTrack` is enabled or not. When setting this will\n     *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n    Object.defineProperty(track, 'enabled', {\n      get: function get$$1() {\n        return enabled;\n      },\n      set: function set$$1(newEnabled) {\n        // an invalid or unchanged value\n        if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n          return;\n        }\n        enabled = newEnabled;\n\n        /**\n         * An event that fires when enabled changes on this track. This allows\n         * the AudioTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event AudioTrack#enabledchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('enabledchange');\n      }\n    });\n\n    // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n    if (settings.enabled) {\n      track.enabled = settings.enabled;\n    }\n    track.loaded_ = true;\n\n    return _ret = track, possibleConstructorReturn(_this, _ret);\n  }\n\n  return AudioTrack;\n}(Track);\n\n/**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n\nvar VideoTrack = function (_Track) {\n  inherits(VideoTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid {@link VideoTrack~Kind}\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.selected]\n   *        If this track is the one that is currently playing.\n   */\n  function VideoTrack() {\n    var _this, _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, VideoTrack);\n\n    var settings = mergeOptions(options, {\n      kind: VideoTrackKind[options.kind] || ''\n    });\n\n    // on IE8 this will be a document element\n    // for every other browser this will be a normal object\n    var track = (_this = possibleConstructorReturn(this, _Track.call(this, settings)), _this);\n    var selected = false;\n\n    if (IS_IE8) {\n      for (var prop in VideoTrack.prototype) {\n        if (prop !== 'constructor') {\n          track[prop] = VideoTrack.prototype[prop];\n        }\n      }\n    }\n\n    /**\n     * @memberof VideoTrack\n     * @member {boolean} selected\n     *         If this `VideoTrack` is selected or not. When setting this will\n     *         fire {@link VideoTrack#selectedchange} if the state of selected changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n    Object.defineProperty(track, 'selected', {\n      get: function get$$1() {\n        return selected;\n      },\n      set: function set$$1(newSelected) {\n        // an invalid or unchanged value\n        if (typeof newSelected !== 'boolean' || newSelected === selected) {\n          return;\n        }\n        selected = newSelected;\n\n        /**\n         * An event that fires when selected changes on this track. This allows\n         * the VideoTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event VideoTrack#selectedchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('selectedchange');\n      }\n    });\n\n    // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n    if (settings.selected) {\n      track.selected = settings.selected;\n    }\n\n    return _ret = track, possibleConstructorReturn(_this, _ret);\n  }\n\n  return VideoTrack;\n}(Track);\n\n/**\n * @file html-track-element.js\n */\n\n/**\n * @memberof HTMLTrackElement\n * @typedef {HTMLTrackElement~ReadyState}\n * @enum {number}\n */\nvar NONE = 0;\nvar LOADING = 1;\nvar LOADED = 2;\nvar ERROR = 3;\n\n/**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n\nvar HTMLTrackElement = function (_EventTarget) {\n  inherits(HTMLTrackElement, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this HTMLTrackElement.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        vesion of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function HTMLTrackElement() {\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, HTMLTrackElement);\n\n    var _this = possibleConstructorReturn(this, _EventTarget.call(this));\n\n    var readyState = void 0;\n    var trackElement = _this; // eslint-disable-line\n\n    if (IS_IE8) {\n      trackElement = document.createElement('custom');\n\n      for (var prop in HTMLTrackElement.prototype) {\n        if (prop !== 'constructor') {\n          trackElement[prop] = HTMLTrackElement.prototype[prop];\n        }\n      }\n    }\n\n    var track = new TextTrack(options);\n\n    trackElement.kind = track.kind;\n    trackElement.src = track.src;\n    trackElement.srclang = track.language;\n    trackElement.label = track.label;\n    trackElement['default'] = track['default'];\n\n    /**\n     * @memberof HTMLTrackElement\n     * @member {HTMLTrackElement~ReadyState} readyState\n     *         The current ready state of the track element.\n     * @instance\n     */\n    Object.defineProperty(trackElement, 'readyState', {\n      get: function get$$1() {\n        return readyState;\n      }\n    });\n\n    /**\n     * @memberof HTMLTrackElement\n     * @member {TextTrack} track\n     *         The underlying TextTrack object.\n     * @instance\n     *\n     */\n    Object.defineProperty(trackElement, 'track', {\n      get: function get$$1() {\n        return track;\n      }\n    });\n\n    readyState = NONE;\n\n    /**\n     * @listens TextTrack#loadeddata\n     * @fires HTMLTrackElement#load\n     */\n    track.addEventListener('loadeddata', function () {\n      readyState = LOADED;\n\n      trackElement.trigger({\n        type: 'load',\n        target: trackElement\n      });\n    });\n\n    if (IS_IE8) {\n      var _ret;\n\n      return _ret = trackElement, possibleConstructorReturn(_this, _ret);\n    }\n    return _this;\n  }\n\n  return HTMLTrackElement;\n}(EventTarget);\n\nHTMLTrackElement.prototype.allowedEvents_ = {\n  load: 'load'\n};\n\nHTMLTrackElement.NONE = NONE;\nHTMLTrackElement.LOADING = LOADING;\nHTMLTrackElement.LOADED = LOADED;\nHTMLTrackElement.ERROR = ERROR;\n\n/*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\nvar NORMAL = {\n  audio: {\n    ListClass: AudioTrackList,\n    TrackClass: AudioTrack,\n    capitalName: 'Audio'\n  },\n  video: {\n    ListClass: VideoTrackList,\n    TrackClass: VideoTrack,\n    capitalName: 'Video'\n  },\n  text: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'Text'\n  }\n};\n\nObject.keys(NORMAL).forEach(function (type) {\n  NORMAL[type].getterName = type + 'Tracks';\n  NORMAL[type].privateName = type + 'Tracks_';\n});\n\nvar REMOTE = {\n  remoteText: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'RemoteText',\n    getterName: 'remoteTextTracks',\n    privateName: 'remoteTextTracks_'\n  },\n  remoteTextEl: {\n    ListClass: HtmlTrackElementList,\n    TrackClass: HTMLTrackElement,\n    capitalName: 'RemoteTextTrackEls',\n    getterName: 'remoteTextTrackEls',\n    privateName: 'remoteTextTrackEls_'\n  }\n};\n\nvar ALL = mergeOptions(NORMAL, REMOTE);\n\nREMOTE.names = Object.keys(REMOTE);\nNORMAL.names = Object.keys(NORMAL);\nALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n\n/**\n * @file tech.js\n */\n\n/**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n   * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n *           The url to the source\n *\n * @property {string} type\n *           The mime type of the source\n */\n\n/**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n *        An instance of the Tech class.\n *\n * @param {string} kind\n *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n *        Label to identify the text track\n *\n * @param {string} [language]\n *        Two letter language abbreviation\n *\n * @param {Object} [options={}]\n *        An object with additional text track options\n *\n * @return {TextTrack}\n *          The text track that was created.\n */\nfunction createTrackHelper(self, kind, label, language) {\n  var options = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {};\n\n  var tracks = self.textTracks();\n\n  options.kind = kind;\n\n  if (label) {\n    options.label = label;\n  }\n  if (language) {\n    options.language = language;\n  }\n  options.tech = self;\n\n  var track = new ALL.text.TrackClass(options);\n\n  tracks.addTrack(track);\n\n  return track;\n}\n\n/**\n * This is the base class for media playback technology controllers, such as\n * {@link Flash} and {@link HTML5}\n *\n * @extends Component\n */\n\nvar Tech = function (_Component) {\n  inherits(Tech, _Component);\n\n  /**\n   * Create an instance of this Tech.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} ready\n   *        Callback function to call when the `HTML5` Tech is ready.\n   */\n  function Tech() {\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    var ready = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function () {};\n    classCallCheck(this, Tech);\n\n    // we don't want the tech to report user activity automatically.\n    // This is done manually in addControlsListeners\n    options.reportTouchActivity = false;\n\n    // keep track of whether the current source has played at all to\n    // implement a very limited played()\n    var _this = possibleConstructorReturn(this, _Component.call(this, null, options, ready));\n\n    _this.hasStarted_ = false;\n    _this.on('playing', function () {\n      this.hasStarted_ = true;\n    });\n    _this.on('loadstart', function () {\n      this.hasStarted_ = false;\n    });\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      if (options && options[props.getterName]) {\n        _this[props.privateName] = options[props.getterName];\n      }\n    });\n\n    // Manually track progress in cases where the browser/flash player doesn't report it.\n    if (!_this.featuresProgressEvents) {\n      _this.manualProgressOn();\n    }\n\n    // Manually track timeupdates in cases where the browser/flash player doesn't report it.\n    if (!_this.featuresTimeupdateEvents) {\n      _this.manualTimeUpdatesOn();\n    }\n\n    ['Text', 'Audio', 'Video'].forEach(function (track) {\n      if (options['native' + track + 'Tracks'] === false) {\n        _this['featuresNative' + track + 'Tracks'] = false;\n      }\n    });\n\n    if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n      _this.featuresNativeTextTracks = false;\n    } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n      _this.featuresNativeTextTracks = true;\n    }\n\n    if (!_this.featuresNativeTextTracks) {\n      _this.emulateTextTracks();\n    }\n\n    _this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n\n    _this.initTrackListeners();\n\n    // Turn on component tap events only if not using native controls\n    if (!options.nativeControlsForTouch) {\n      _this.emitTapEvents();\n    }\n\n    if (_this.constructor) {\n      _this.name_ = _this.constructor.name || 'Unknown Tech';\n    }\n    return _this;\n  }\n\n  /**\n   * A special function to trigger source set in a way that will allow player\n   * to re-trigger if the player or tech are not ready yet.\n   *\n   * @fires Tech#sourceset\n   * @param {string} src The source string at the time of the source changing.\n   */\n\n\n  Tech.prototype.triggerSourceset = function triggerSourceset(src) {\n    var _this2 = this;\n\n    if (!this.isReady_) {\n      // on initial ready we have to trigger source set\n      // 1ms after ready so that player can watch for it.\n      this.one('ready', function () {\n        return _this2.setTimeout(function () {\n          return _this2.triggerSourceset(src);\n        }, 1);\n      });\n    }\n\n    /**\n     * Fired when the source is set on the tech causing the media element\n     * to reload.\n     *\n     * @see {@link Player#event:sourceset}\n     * @event Tech#sourceset\n     * @type {EventTarget~Event}\n     */\n    this.trigger({\n      src: src,\n      type: 'sourceset'\n    });\n  };\n\n  /* Fallbacks for unsupported event types\n  ================================================================================ */\n\n  /**\n   * Polyfill the `progress` event for browsers that don't support it natively.\n   *\n   * @see {@link Tech#trackProgress}\n   */\n\n\n  Tech.prototype.manualProgressOn = function manualProgressOn() {\n    this.on('durationchange', this.onDurationChange);\n\n    this.manualProgress = true;\n\n    // Trigger progress watching when a source begins loading\n    this.one('ready', this.trackProgress);\n  };\n\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   */\n\n\n  Tech.prototype.manualProgressOff = function manualProgressOff() {\n    this.manualProgress = false;\n    this.stopTrackingProgress();\n\n    this.off('durationchange', this.onDurationChange);\n  };\n\n  /**\n   * This is used to trigger a `progress` event when the buffered percent changes. It\n   * sets an interval function that will be called every 500 milliseconds to check if the\n   * buffer end percent has changed.\n   *\n   * > This function is called by {@link Tech#manualProgressOn}\n   *\n   * @param {EventTarget~Event} event\n   *        The `ready` event that caused this to run.\n   *\n   * @listens Tech#ready\n   * @fires Tech#progress\n   */\n\n\n  Tech.prototype.trackProgress = function trackProgress(event) {\n    this.stopTrackingProgress();\n    this.progressInterval = this.setInterval(bind(this, function () {\n      // Don't trigger unless buffered amount is greater than last time\n\n      var numBufferedPercent = this.bufferedPercent();\n\n      if (this.bufferedPercent_ !== numBufferedPercent) {\n        /**\n         * See {@link Player#progress}\n         *\n         * @event Tech#progress\n         * @type {EventTarget~Event}\n         */\n        this.trigger('progress');\n      }\n\n      this.bufferedPercent_ = numBufferedPercent;\n\n      if (numBufferedPercent === 1) {\n        this.stopTrackingProgress();\n      }\n    }), 500);\n  };\n\n  /**\n   * Update our internal duration on a `durationchange` event by calling\n   * {@link Tech#duration}.\n   *\n   * @param {EventTarget~Event} event\n   *        The `durationchange` event that caused this to run.\n   *\n   * @listens Tech#durationchange\n   */\n\n\n  Tech.prototype.onDurationChange = function onDurationChange(event) {\n    this.duration_ = this.duration();\n  };\n\n  /**\n   * Get and create a `TimeRange` object for buffering.\n   *\n   * @return {TimeRange}\n   *         The time range object that was created.\n   */\n\n\n  Tech.prototype.buffered = function buffered() {\n    return createTimeRanges(0, 0);\n  };\n\n  /**\n   * Get the percentage of the current video that is currently buffered.\n   *\n   * @return {number}\n   *         A number from 0 to 1 that represents the decimal percentage of the\n   *         video that is buffered.\n   *\n   */\n\n\n  Tech.prototype.bufferedPercent = function bufferedPercent$$1() {\n    return bufferedPercent(this.buffered(), this.duration_);\n  };\n\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   * Stop manually tracking progress events by clearing the interval that was set in\n   * {@link Tech#trackProgress}.\n   */\n\n\n  Tech.prototype.stopTrackingProgress = function stopTrackingProgress() {\n    this.clearInterval(this.progressInterval);\n  };\n\n  /**\n   * Polyfill the `timeupdate` event for browsers that don't support it.\n   *\n   * @see {@link Tech#trackCurrentTime}\n   */\n\n\n  Tech.prototype.manualTimeUpdatesOn = function manualTimeUpdatesOn() {\n    this.manualTimeUpdates = true;\n\n    this.on('play', this.trackCurrentTime);\n    this.on('pause', this.stopTrackingCurrentTime);\n  };\n\n  /**\n   * Turn off the polyfill for `timeupdate` events that was created in\n   * {@link Tech#manualTimeUpdatesOn}\n   */\n\n\n  Tech.prototype.manualTimeUpdatesOff = function manualTimeUpdatesOff() {\n    this.manualTimeUpdates = false;\n    this.stopTrackingCurrentTime();\n    this.off('play', this.trackCurrentTime);\n    this.off('pause', this.stopTrackingCurrentTime);\n  };\n\n  /**\n   * Sets up an interval function to track current time and trigger `timeupdate` every\n   * 250 milliseconds.\n   *\n   * @listens Tech#play\n   * @triggers Tech#timeupdate\n   */\n\n\n  Tech.prototype.trackCurrentTime = function trackCurrentTime() {\n    if (this.currentTimeInterval) {\n      this.stopTrackingCurrentTime();\n    }\n    this.currentTimeInterval = this.setInterval(function () {\n      /**\n       * Triggered at an interval of 250ms to indicated that time is passing in the video.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n\n      // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n    }, 250);\n  };\n\n  /**\n   * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n   * `timeupdate` event is no longer triggered.\n   *\n   * @listens {Tech#pause}\n   */\n\n\n  Tech.prototype.stopTrackingCurrentTime = function stopTrackingCurrentTime() {\n    this.clearInterval(this.currentTimeInterval);\n\n    // #1002 - if the video ends right before the next timeupdate would happen,\n    // the progress bar won't make it all the way to the end\n    this.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n  };\n\n  /**\n   * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n   * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n   *\n   * @fires Component#dispose\n   */\n\n\n  Tech.prototype.dispose = function dispose() {\n\n    // clear out all tracks because we can't reuse them between techs\n    this.clearTracks(NORMAL.names);\n\n    // Turn off any manual progress or timeupdate tracking\n    if (this.manualProgress) {\n      this.manualProgressOff();\n    }\n\n    if (this.manualTimeUpdates) {\n      this.manualTimeUpdatesOff();\n    }\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n   *\n   * > Note: Techs without source handlers should call this between sources for `video`\n   *         & `audio` tracks. You don't want to use them between tracks!\n   *\n   * @param {string[]|string} types\n   *        TrackList names to clear, valid names are `video`, `audio`, and\n   *        `text`.\n   */\n\n\n  Tech.prototype.clearTracks = function clearTracks(types) {\n    var _this3 = this;\n\n    types = [].concat(types);\n    // clear out all tracks because we can't reuse them between techs\n    types.forEach(function (type) {\n      var list = _this3[type + 'Tracks']() || [];\n      var i = list.length;\n\n      while (i--) {\n        var track = list[i];\n\n        if (type === 'text') {\n          _this3.removeRemoteTextTrack(track);\n        }\n        list.removeTrack(track);\n      }\n    });\n  };\n\n  /**\n   * Remove any TextTracks added via addRemoteTextTrack that are\n   * flagged for automatic garbage collection\n   */\n\n\n  Tech.prototype.cleanupAutoTextTracks = function cleanupAutoTextTracks() {\n    var list = this.autoRemoteTextTracks_ || [];\n    var i = list.length;\n\n    while (i--) {\n      var track = list[i];\n\n      this.removeRemoteTextTrack(track);\n    }\n  };\n\n  /**\n   * Reset the tech, which will removes all sources and reset the internal readyState.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.reset = function reset() {};\n\n  /**\n   * Get or set an error on the Tech.\n   *\n   * @param {MediaError} [err]\n   *        Error to set on the Tech\n   *\n   * @return {MediaError|null}\n   *         The current error object on the tech, or null if there isn't one.\n   */\n\n\n  Tech.prototype.error = function error(err) {\n    if (err !== undefined) {\n      this.error_ = new MediaError(err);\n      this.trigger('error');\n    }\n    return this.error_;\n  };\n\n  /**\n   * Returns the `TimeRange`s that have been played through for the current source.\n   *\n   * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n   *         It only checks wether the source has played at all or not.\n   *\n   * @return {TimeRange}\n   *         - A single time range if this video has played\n   *         - An empty set of ranges if not.\n   */\n\n\n  Tech.prototype.played = function played() {\n    if (this.hasStarted_) {\n      return createTimeRanges(0, 0);\n    }\n    return createTimeRanges();\n  };\n\n  /**\n   * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n   * previously called.\n   *\n   * @fires Tech#timeupdate\n   */\n\n\n  Tech.prototype.setCurrentTime = function setCurrentTime() {\n    // improve the accuracy of manual timeupdates\n    if (this.manualTimeUpdates) {\n      /**\n       * A manual `timeupdate` event.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n    }\n  };\n\n  /**\n   * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n   * {@link TextTrackList} events.\n   *\n   * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.\n   *\n   * @fires Tech#audiotrackchange\n   * @fires Tech#videotrackchange\n   * @fires Tech#texttrackchange\n   */\n\n\n  Tech.prototype.initTrackListeners = function initTrackListeners() {\n    var _this4 = this;\n\n    /**\n     * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n     *\n     * @event Tech#audiotrackchange\n     * @type {EventTarget~Event}\n     */\n\n    /**\n     * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n     *\n     * @event Tech#videotrackchange\n     * @type {EventTarget~Event}\n     */\n\n    /**\n     * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n     *\n     * @event Tech#texttrackchange\n     * @type {EventTarget~Event}\n     */\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n      var trackListChanges = function trackListChanges() {\n        _this4.trigger(name + 'trackchange');\n      };\n\n      var tracks = _this4[props.getterName]();\n\n      tracks.addEventListener('removetrack', trackListChanges);\n      tracks.addEventListener('addtrack', trackListChanges);\n\n      _this4.on('dispose', function () {\n        tracks.removeEventListener('removetrack', trackListChanges);\n        tracks.removeEventListener('addtrack', trackListChanges);\n      });\n    });\n  };\n\n  /**\n   * Emulate TextTracks using vtt.js if necessary\n   *\n   * @fires Tech#vttjsloaded\n   * @fires Tech#vttjserror\n   */\n\n\n  Tech.prototype.addWebVttScript_ = function addWebVttScript_() {\n    var _this5 = this;\n\n    if (window.WebVTT) {\n      return;\n    }\n\n    // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n    // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n    // before inserting the WebVTT script\n    if (document.body.contains(this.el())) {\n\n      // load via require if available and vtt.js script location was not passed in\n      // as an option. novtt builds will turn the above require call into an empty object\n      // which will cause this if check to always fail.\n      if (!this.options_['vtt.js'] && isPlain(vtt) && Object.keys(vtt).length > 0) {\n        this.trigger('vttjsloaded');\n        return;\n      }\n\n      // load vtt.js via the script location option or the cdn of no location was\n      // passed in\n      var script = document.createElement('script');\n\n      script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.12.4/vtt.min.js';\n      script.onload = function () {\n        /**\n         * Fired when vtt.js is loaded.\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjsloaded');\n      };\n      script.onerror = function () {\n        /**\n         * Fired when vtt.js was not loaded due to an error\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjserror');\n      };\n      this.on('dispose', function () {\n        script.onload = null;\n        script.onerror = null;\n      });\n      // but have not loaded yet and we set it to true before the inject so that\n      // we don't overwrite the injected window.WebVTT if it loads right away\n      window.WebVTT = true;\n      this.el().parentNode.appendChild(script);\n    } else {\n      this.ready(this.addWebVttScript_);\n    }\n  };\n\n  /**\n   * Emulate texttracks\n   *\n   */\n\n\n  Tech.prototype.emulateTextTracks = function emulateTextTracks() {\n    var _this6 = this;\n\n    var tracks = this.textTracks();\n    var remoteTracks = this.remoteTextTracks();\n    var handleAddTrack = function handleAddTrack(e) {\n      return tracks.addTrack(e.track);\n    };\n    var handleRemoveTrack = function handleRemoveTrack(e) {\n      return tracks.removeTrack(e.track);\n    };\n\n    remoteTracks.on('addtrack', handleAddTrack);\n    remoteTracks.on('removetrack', handleRemoveTrack);\n\n    this.addWebVttScript_();\n\n    var updateDisplay = function updateDisplay() {\n      return _this6.trigger('texttrackchange');\n    };\n\n    var textTracksChanges = function textTracksChanges() {\n      updateDisplay();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n\n        track.removeEventListener('cuechange', updateDisplay);\n        if (track.mode === 'showing') {\n          track.addEventListener('cuechange', updateDisplay);\n        }\n      }\n    };\n\n    textTracksChanges();\n    tracks.addEventListener('change', textTracksChanges);\n    tracks.addEventListener('addtrack', textTracksChanges);\n    tracks.addEventListener('removetrack', textTracksChanges);\n\n    this.on('dispose', function () {\n      remoteTracks.off('addtrack', handleAddTrack);\n      remoteTracks.off('removetrack', handleRemoveTrack);\n      tracks.removeEventListener('change', textTracksChanges);\n      tracks.removeEventListener('addtrack', textTracksChanges);\n      tracks.removeEventListener('removetrack', textTracksChanges);\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n\n        track.removeEventListener('cuechange', updateDisplay);\n      }\n    });\n  };\n\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n\n\n  Tech.prototype.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!kind) {\n      throw new Error('TextTrack kind is required but was not provided');\n    }\n\n    return createTrackHelper(this, kind, label, language);\n  };\n\n  /**\n   * Create an emulated TextTrack for use by addRemoteTextTrack\n   *\n   * This is intended to be overridden by classes that inherit from\n   * Tech in order to create native or custom TextTracks.\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n\n\n  Tech.prototype.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    var track = mergeOptions(options, {\n      tech: this\n    });\n\n    return new REMOTE.remoteTextEl.TrackClass(track);\n  };\n\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n   *\n   * @param {Object} options\n   *        See {@link Tech#createRemoteTextTrack} for more detailed properties.\n   *\n   * @param {boolean} [manualCleanup=true]\n   *        - When false: the TextTrack will be automatically removed from the video\n   *          element whenever the source changes\n   *        - When True: The TextTrack will have to be cleaned up manually\n   *\n   * @return {HTMLTrackElement}\n   *         An Html Track Element.\n   *\n   * @deprecated The default functionality for this function will be equivalent\n   *             to \"manualCleanup=false\" in the future. The manualCleanup parameter will\n   *             also be removed.\n   */\n\n\n  Tech.prototype.addRemoteTextTrack = function addRemoteTextTrack() {\n    var _this7 = this;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    var manualCleanup = arguments[1];\n\n    var htmlTrackElement = this.createRemoteTextTrack(options);\n\n    if (manualCleanup !== true && manualCleanup !== false) {\n      // deprecation warning\n      log.warn('Calling addRemoteTextTrack without explicitly setting the \"manualCleanup\" parameter to `true` is deprecated and default to `false` in future version of video.js');\n      manualCleanup = true;\n    }\n\n    // store HTMLTrackElement and TextTrack to remote list\n    this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n    this.remoteTextTracks().addTrack(htmlTrackElement.track);\n\n    if (manualCleanup !== true) {\n      // create the TextTrackList if it doesn't exist\n      this.ready(function () {\n        return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);\n      });\n    }\n\n    return htmlTrackElement;\n  };\n\n  /**\n   * Remove a remote text track from the remote `TextTrackList`.\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` to remove from the `TextTrackList`\n   */\n\n\n  Tech.prototype.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track);\n\n    // remove HTMLTrackElement and TextTrack from remote list\n    this.remoteTextTrackEls().removeTrackElement_(trackElement);\n    this.remoteTextTracks().removeTrack(track);\n    this.autoRemoteTextTracks_.removeTrack(track);\n  };\n\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return {};\n  };\n\n  /**\n   * A method to set a poster from a `Tech`.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.setPoster = function setPoster() {};\n\n  /**\n   * A method to check for the presence of the 'playsinine' <video> attribute.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.playsinline = function playsinline() {};\n\n  /**\n   * A method to set or unset the 'playsinine' <video> attribute.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.setPlaysinline = function setPlaysinline() {};\n\n  /*\n   * Check if the tech can support the given mime-type.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param  {string} type\n   *         The mimetype to check for support\n   *\n   * @return {string}\n   *         'probably', 'maybe', or empty string\n   *\n   * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.canPlayType = function canPlayType() {\n    return '';\n  };\n\n  /**\n   * Check if the type is supported by this tech.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param {string} type\n   *        The media type to check\n   * @return {string} Returns the native video element's response\n   */\n\n\n  Tech.canPlayType = function canPlayType() {\n    return '';\n  };\n\n  /**\n   * Check if the tech can support the given source\n   * @param {Object} srcObj\n   *        The source object\n   * @param {Object} options\n   *        The options passed to the tech\n   * @return {string} 'probably', 'maybe', or '' (empty string)\n   */\n\n\n  Tech.canPlaySource = function canPlaySource(srcObj, options) {\n    return Tech.canPlayType(srcObj.type);\n  };\n\n  /*\n   * Return whether the argument is a Tech or not.\n   * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n   *\n   * @param {Object} component\n   *        The item to check\n   *\n   * @return {boolean}\n   *         Whether it is a tech or not\n   *         - True if it is a tech\n   *         - False if it is not\n   */\n\n\n  Tech.isTech = function isTech(component) {\n    return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n  };\n\n  /**\n   * Registers a `Tech` into a shared list for videojs.\n   *\n   * @param {string} name\n   *        Name of the `Tech` to register.\n   *\n   * @param {Object} tech\n   *        The `Tech` class to register.\n   */\n\n\n  Tech.registerTech = function registerTech(name, tech) {\n    if (!Tech.techs_) {\n      Tech.techs_ = {};\n    }\n\n    if (!Tech.isTech(tech)) {\n      throw new Error('Tech ' + name + ' must be a Tech');\n    }\n\n    if (!Tech.canPlayType) {\n      throw new Error('Techs must have a static canPlayType method on them');\n    }\n    if (!Tech.canPlaySource) {\n      throw new Error('Techs must have a static canPlaySource method on them');\n    }\n\n    name = toTitleCase(name);\n\n    Tech.techs_[name] = tech;\n    if (name !== 'Tech') {\n      // camel case the techName for use in techOrder\n      Tech.defaultTechOrder_.push(name);\n    }\n    return tech;\n  };\n\n  /**\n   * Get a `Tech` from the shared list by name.\n   *\n   * @param {string} name\n   *        `camelCase` or `TitleCase` name of the Tech to get\n   *\n   * @return {Tech|undefined}\n   *         The `Tech` or undefined if there was no tech with the name requsted.\n   */\n\n\n  Tech.getTech = function getTech(name) {\n    if (!name) {\n      return;\n    }\n\n    name = toTitleCase(name);\n\n    if (Tech.techs_ && Tech.techs_[name]) {\n      return Tech.techs_[name];\n    }\n\n    if (window && window.videojs && window.videojs[name]) {\n      log.warn('The ' + name + ' tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)');\n      return window.videojs[name];\n    }\n  };\n\n  return Tech;\n}(Component);\n\n/**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n/**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Tech.prototype[props.getterName] = function () {\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n\n/**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n/**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n/**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n/**\n * Boolean indicating wether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresVolumeControl = true;\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default\n */\nTech.prototype.featuresMuteControl = true;\n\n/**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresFullscreenResize = false;\n\n/**\n * Boolean indicating wether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresPlaybackRate = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the `progress` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresProgressEvents = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresSourceset = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the `timeupdate` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresTimeupdateEvents = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresNativeTextTracks = false;\n\n/**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n *        The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\nTech.withSourceHandlers = function (_Tech) {\n\n  /**\n   * Register a source handler\n   *\n   * @param {Function} handler\n   *        The source handler class\n   *\n   * @param {number} [index]\n   *        Register it at the following index\n   */\n  _Tech.registerSourceHandler = function (handler, index) {\n    var handlers = _Tech.sourceHandlers;\n\n    if (!handlers) {\n      handlers = _Tech.sourceHandlers = [];\n    }\n\n    if (index === undefined) {\n      // add to the end of the list\n      index = handlers.length;\n    }\n\n    handlers.splice(index, 0, handler);\n  };\n\n  /**\n   * Check if the tech can support the given type. Also checks the\n   * Techs sourceHandlers.\n   *\n   * @param {string} type\n   *         The mimetype to check.\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  _Tech.canPlayType = function (type) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can = void 0;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canPlayType(type);\n\n      if (can) {\n        return can;\n      }\n    }\n\n    return '';\n  };\n\n  /**\n   * Returns the first source handler that supports the source.\n   *\n   * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {SourceHandler|null}\n   *          The first source handler that supports the source or null if\n   *          no SourceHandler supports the source\n   */\n  _Tech.selectSourceHandler = function (source, options) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can = void 0;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canHandleSource(source, options);\n\n      if (can) {\n        return handlers[i];\n      }\n    }\n\n    return null;\n  };\n\n  /**\n   * Check if the tech can support the given source.\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  _Tech.canPlaySource = function (srcObj, options) {\n    var sh = _Tech.selectSourceHandler(srcObj, options);\n\n    if (sh) {\n      return sh.canHandleSource(srcObj, options);\n    }\n\n    return '';\n  };\n\n  /**\n   * When using a source handler, prefer its implementation of\n   * any function normally provided by the tech.\n   */\n  var deferrable = ['seekable', 'seeking', 'duration'];\n\n  /**\n   * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n   * function if it exists, with a fallback to the Techs seekable function.\n   *\n   * @method _Tech.seekable\n   */\n\n  /**\n   * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n   * function if it exists, otherwise it will fallback to the techs duration function.\n   *\n   * @method _Tech.duration\n   */\n\n  deferrable.forEach(function (fnName) {\n    var originalFn = this[fnName];\n\n    if (typeof originalFn !== 'function') {\n      return;\n    }\n\n    this[fnName] = function () {\n      if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n        return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n      }\n      return originalFn.apply(this, arguments);\n    };\n  }, _Tech.prototype);\n\n  /**\n   * Create a function for setting the source using a source object\n   * and source handlers.\n   * Should never be called unless a source handler was found.\n   *\n   * @param {Tech~SourceObject} source\n   *        A source object with src and type keys\n   */\n  _Tech.prototype.setSource = function (source) {\n    var sh = _Tech.selectSourceHandler(source, this.options_);\n\n    if (!sh) {\n      // Fall back to a native source hander when unsupported sources are\n      // deliberately set\n      if (_Tech.nativeSourceHandler) {\n        sh = _Tech.nativeSourceHandler;\n      } else {\n        log.error('No source hander found for the current source.');\n      }\n    }\n\n    // Dispose any existing source handler\n    this.disposeSourceHandler();\n    this.off('dispose', this.disposeSourceHandler);\n\n    if (sh !== _Tech.nativeSourceHandler) {\n      this.currentSource_ = source;\n    }\n\n    this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n    this.on('dispose', this.disposeSourceHandler);\n  };\n\n  /**\n   * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n   *\n   * @listens Tech#dispose\n   */\n  _Tech.prototype.disposeSourceHandler = function () {\n    // if we have a source and get another one\n    // then we are loading something new\n    // than clear all of our current tracks\n    if (this.currentSource_) {\n      this.clearTracks(['audio', 'video']);\n      this.currentSource_ = null;\n    }\n\n    // always clean up auto-text tracks\n    this.cleanupAutoTextTracks();\n\n    if (this.sourceHandler_) {\n\n      if (this.sourceHandler_.dispose) {\n        this.sourceHandler_.dispose();\n      }\n\n      this.sourceHandler_ = null;\n    }\n  };\n};\n\n// The base Tech class needs to be registered as a Component. It is the only\n// Tech that can be registered as a Component.\nComponent.registerComponent('Tech', Tech);\nTech.registerTech('Tech', Tech);\n\n/**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\nTech.defaultTechOrder_ = [];\n\nvar middlewares = {};\nvar middlewareInstances = {};\n\nvar TERMINATOR = {};\n\nfunction use(type, middleware) {\n  middlewares[type] = middlewares[type] || [];\n  middlewares[type].push(middleware);\n}\n\n\n\nfunction setSource(player, src, next) {\n  player.setTimeout(function () {\n    return setSourceHelper(src, middlewares[src.type], next, player);\n  }, 1);\n}\n\nfunction setTech(middleware, tech) {\n  middleware.forEach(function (mw) {\n    return mw.setTech && mw.setTech(tech);\n  });\n}\n\n/**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n */\nfunction get$1(middleware, tech, method) {\n  return middleware.reduceRight(middlewareIterator(method), tech[method]());\n}\n\n/**\n * Takes the argument given to the player and calls the setter method on each\n * middlware from left to right to the tech.\n */\nfunction set$1(middleware, tech, method, arg) {\n  return tech[method](middleware.reduce(middlewareIterator(method), arg));\n}\n\n/**\n * Takes the argument given to the player and calls the `call` version of the method\n * on each middleware from left to right.\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n */\nfunction mediate(middleware, tech, method) {\n  var arg = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;\n\n  var callMethod = 'call' + toTitleCase(method);\n  var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n  var terminated = middlewareValue === TERMINATOR;\n  var returnValue = terminated ? null : tech[method](middlewareValue);\n\n  executeRight(middleware, method, returnValue, terminated);\n\n  return returnValue;\n}\n\nvar allowedGetters = {\n  buffered: 1,\n  currentTime: 1,\n  duration: 1,\n  seekable: 1,\n  played: 1,\n  paused: 1\n};\n\nvar allowedSetters = {\n  setCurrentTime: 1\n};\n\nvar allowedMediators = {\n  play: 1,\n  pause: 1\n};\n\nfunction middlewareIterator(method) {\n  return function (value, mw) {\n    // if the previous middleware terminated, pass along the termination\n    if (value === TERMINATOR) {\n      return TERMINATOR;\n    }\n\n    if (mw[method]) {\n      return mw[method](value);\n    }\n\n    return value;\n  };\n}\n\nfunction executeRight(mws, method, value, terminated) {\n  for (var i = mws.length - 1; i >= 0; i--) {\n    var mw = mws[i];\n\n    if (mw[method]) {\n      mw[method](terminated, value);\n    }\n  }\n}\n\nfunction clearCacheForPlayer(player) {\n  middlewareInstances[player.id()] = null;\n}\n\n/**\n * {\n *  [playerId]: [[mwFactory, mwInstance], ...]\n * }\n */\nfunction getOrCreateFactory(player, mwFactory) {\n  var mws = middlewareInstances[player.id()];\n  var mw = null;\n\n  if (mws === undefined || mws === null) {\n    mw = mwFactory(player);\n    middlewareInstances[player.id()] = [[mwFactory, mw]];\n    return mw;\n  }\n\n  for (var i = 0; i < mws.length; i++) {\n    var _mws$i = mws[i],\n        mwf = _mws$i[0],\n        mwi = _mws$i[1];\n\n\n    if (mwf !== mwFactory) {\n      continue;\n    }\n\n    mw = mwi;\n  }\n\n  if (mw === null) {\n    mw = mwFactory(player);\n    mws.push([mwFactory, mw]);\n  }\n\n  return mw;\n}\n\nfunction setSourceHelper() {\n  var src = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n  var middleware = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];\n  var next = arguments[2];\n  var player = arguments[3];\n  var acc = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : [];\n  var lastRun = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : false;\n  var mwFactory = middleware[0],\n      mwrest = middleware.slice(1);\n\n  // if mwFactory is a string, then we're at a fork in the road\n\n  if (typeof mwFactory === 'string') {\n    setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun);\n\n    // if we have an mwFactory, call it with the player to get the mw,\n    // then call the mw's setSource method\n  } else if (mwFactory) {\n    var mw = getOrCreateFactory(player, mwFactory);\n\n    // if setSource isn't present, implicitly select this middleware\n    if (!mw.setSource) {\n      acc.push(mw);\n      return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n    }\n\n    mw.setSource(assign({}, src), function (err, _src) {\n\n      // something happened, try the next middleware on the current level\n      // make sure to use the old src\n      if (err) {\n        return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n      }\n\n      // we've succeeded, now we need to go deeper\n      acc.push(mw);\n\n      // if it's the same type, continue down the current chain\n      // otherwise, we want to go down the new chain\n      setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n    });\n  } else if (mwrest.length) {\n    setSourceHelper(src, mwrest, next, player, acc, lastRun);\n  } else if (lastRun) {\n    next(src, acc);\n  } else {\n    setSourceHelper(src, middlewares['*'], next, player, acc, true);\n  }\n}\n\n/**\n * Mimetypes\n *\n * @see http://hul.harvard.edu/ois/////systems/wax/wax-public-help/mimetypes.htm\n * @typedef Mimetypes~Kind\n * @enum\n */\nvar MimetypesKind = {\n  opus: 'video/ogg',\n  ogv: 'video/ogg',\n  mp4: 'video/mp4',\n  mov: 'video/mp4',\n  m4v: 'video/mp4',\n  mkv: 'video/x-matroska',\n  mp3: 'audio/mpeg',\n  aac: 'audio/aac',\n  oga: 'audio/ogg',\n  m3u8: 'application/x-mpegURL'\n};\n\n/**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n *        The url to the src\n *\n * @return {string}\n *         return the mimetype if it was known or empty string otherwise\n */\nvar getMimetype = function getMimetype() {\n  var src = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';\n\n  var ext = getFileExtension(src);\n  var mimetype = MimetypesKind[ext.toLowerCase()];\n\n  return mimetype || '';\n};\n\n/**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param {Player} player\n *        The player object\n *\n * @param {string} src\n *        The source string\n *\n * @return {string}\n *         The type that was found\n */\nvar findMimetype = function findMimetype(player, src) {\n  if (!src) {\n    return '';\n  }\n\n  // 1. check for the type in the `source` cache\n  if (player.cache_.source.src === src && player.cache_.source.type) {\n    return player.cache_.source.type;\n  }\n\n  // 2. see if we have this source in our `currentSources` cache\n  var matchingSources = player.cache_.sources.filter(function (s) {\n    return s.src === src;\n  });\n\n  if (matchingSources.length) {\n    return matchingSources[0].type;\n  }\n\n  // 3. look for the src url in source elements and use the type there\n  var sources = player.$$('source');\n\n  for (var i = 0; i < sources.length; i++) {\n    var s = sources[i];\n\n    if (s.type && s.src && s.src === src) {\n      return s.type;\n    }\n  }\n\n  // 4. finally fallback to our list of mime types based on src url extension\n  return getMimetype(src);\n};\n\n/**\n * @module filter-source\n */\n/**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n *        The src object to filter\n *\n * @return {Tech~SourceObject[]}\n *         An array of sourceobjects containing only valid sources\n *\n * @private\n */\nvar filterSource = function filterSource(src) {\n  // traverse array\n  if (Array.isArray(src)) {\n    var newsrc = [];\n\n    src.forEach(function (srcobj) {\n      srcobj = filterSource(srcobj);\n\n      if (Array.isArray(srcobj)) {\n        newsrc = newsrc.concat(srcobj);\n      } else if (isObject(srcobj)) {\n        newsrc.push(srcobj);\n      }\n    });\n\n    src = newsrc;\n  } else if (typeof src === 'string' && src.trim()) {\n    // convert string into object\n    src = [fixSource({ src: src })];\n  } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n    // src is already valid\n    src = [fixSource(src)];\n  } else {\n    // invalid source, turn it into an empty array\n    src = [];\n  }\n\n  return src;\n};\n\n/**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n *        The src object to check\n * @return {Tech~SourceObject}\n *        src Object with known type\n */\nfunction fixSource(src) {\n  var mimetype = getMimetype(src.src);\n\n  if (!src.type && mimetype) {\n    src.type = mimetype;\n  }\n\n  return src;\n}\n\n/**\n * @file loader.js\n */\n/**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n\nvar MediaLoader = function (_Component) {\n  inherits(MediaLoader, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value stroe of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function that is run when this component is ready.\n   */\n  function MediaLoader(player, options, ready) {\n    classCallCheck(this, MediaLoader);\n\n    // MediaLoader has no element\n    var options_ = mergeOptions({ createEl: false }, options);\n\n    // If there are no sources when the player is initialized,\n    // load the first supported playback technology.\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options_, ready));\n\n    if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n      for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n        var techName = toTitleCase(j[i]);\n        var tech = Tech.getTech(techName);\n\n        // Support old behavior of techs being registered as components.\n        // Remove once that deprecated behavior is removed.\n        if (!techName) {\n          tech = Component.getComponent(techName);\n        }\n\n        // Check if the browser supports this technology\n        if (tech && tech.isSupported()) {\n          player.loadTech_(techName);\n          break;\n        }\n      }\n    } else {\n      // Loop through playback technologies (HTML5, Flash) and check for support.\n      // Then load the best source.\n      // A few assumptions here:\n      //   All playback technologies respect preload false.\n      player.src(options.playerOptions.sources);\n    }\n    return _this;\n  }\n\n  return MediaLoader;\n}(Component);\n\nComponent.registerComponent('MediaLoader', MediaLoader);\n\n/**\n * @file button.js\n */\n/**\n * Clickable Component which is clickable or keyboard actionable,\n * but is not a native HTML button.\n *\n * @extends Component\n */\n\nvar ClickableComponent = function (_Component) {\n  inherits(ClickableComponent, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ClickableComponent(player, options) {\n    classCallCheck(this, ClickableComponent);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.emitTapEvents();\n\n    _this.enable();\n    return _this;\n  }\n\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tag=div]\n   *        The element's node type.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  ClickableComponent.prototype.createEl = function createEl$$1() {\n    var tag = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'div';\n    var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    props = assign({\n      innerHTML: '<span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>',\n      className: this.buildCSSClass(),\n      tabIndex: 0\n    }, props);\n\n    if (tag === 'button') {\n      log.error('Creating a ClickableComponent with an HTML element of ' + tag + ' is not supported; use a Button instead.');\n    }\n\n    // Add ARIA attributes for clickable element which is not a native HTML button\n    attributes = assign({\n      role: 'button'\n    }, attributes);\n\n    this.tabIndex_ = props.tabIndex;\n\n    var el = _Component.prototype.createEl.call(this, tag, props, attributes);\n\n    this.createControlTextEl(el);\n\n    return el;\n  };\n\n  ClickableComponent.prototype.dispose = function dispose() {\n    // remove controlTextEl_ on dipose\n    this.controlTextEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create a control text element on this `Component`\n   *\n   * @param {Element} [el]\n   *        Parent element for the control text.\n   *\n   * @return {Element}\n   *         The control text element that gets created.\n   */\n\n\n  ClickableComponent.prototype.createControlTextEl = function createControlTextEl(el) {\n    this.controlTextEl_ = createEl('span', {\n      className: 'vjs-control-text'\n    }, {\n      // let the screen reader user know that the text of the element may change\n      'aria-live': 'polite'\n    });\n\n    if (el) {\n      el.appendChild(this.controlTextEl_);\n    }\n\n    this.controlText(this.controlText_, el);\n\n    return this.controlTextEl_;\n  };\n\n  /**\n   * Get or set the localize text to use for the controls on the `Component`.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n\n\n  ClickableComponent.prototype.controlText = function controlText(text) {\n    var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.el();\n\n    if (text === undefined) {\n      return this.controlText_ || 'Need Text';\n    }\n\n    var localizedText = this.localize(text);\n\n    this.controlText_ = text;\n    textContent(this.controlTextEl_, localizedText);\n    if (!this.nonIconControl) {\n      // Set title attribute if only an icon is shown\n      el.setAttribute('title', localizedText);\n    }\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  ClickableComponent.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-control vjs-button ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Enable this `Component`s element.\n   */\n\n\n  ClickableComponent.prototype.enable = function enable() {\n    if (!this.enabled_) {\n      this.enabled_ = true;\n      this.removeClass('vjs-disabled');\n      this.el_.setAttribute('aria-disabled', 'false');\n      if (typeof this.tabIndex_ !== 'undefined') {\n        this.el_.setAttribute('tabIndex', this.tabIndex_);\n      }\n      this.on(['tap', 'click'], this.handleClick);\n      this.on('focus', this.handleFocus);\n      this.on('blur', this.handleBlur);\n    }\n  };\n\n  /**\n   * Disable this `Component`s element.\n   */\n\n\n  ClickableComponent.prototype.disable = function disable() {\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.el_.setAttribute('aria-disabled', 'true');\n    if (typeof this.tabIndex_ !== 'undefined') {\n      this.el_.removeAttribute('tabIndex');\n    }\n    this.off(['tap', 'click'], this.handleClick);\n    this.off('focus', this.handleFocus);\n    this.off('blur', this.handleBlur);\n  };\n\n  /**\n   * This gets called when a `ClickableComponent` gets:\n   * - Clicked (via the `click` event, listening starts in the constructor)\n   * - Tapped (via the `tap` event, listening starts in the constructor)\n   * - The following things happen in order:\n   *   1. {@link ClickableComponent#handleFocus} is called via a `focus` event on the\n   *      `ClickableComponent`.\n   *   2. {@link ClickableComponent#handleFocus} adds a listener for `keydown` on using\n   *      {@link ClickableComponent#handleKeyPress}.\n   *   3. `ClickableComponent` has not had a `blur` event (`blur` means that focus was lost). The user presses\n   *      the space or enter key.\n   *   4. {@link ClickableComponent#handleKeyPress} calls this function with the `keydown`\n   *      event as a parameter.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @abstract\n   */\n\n\n  ClickableComponent.prototype.handleClick = function handleClick(event) {};\n\n  /**\n   * This gets called when a `ClickableComponent` gains focus via a `focus` event.\n   * Turns on listening for `keydown` events. When they happen it\n   * calls `this.handleKeyPress`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `focus` event that caused this function to be called.\n   *\n   * @listens focus\n   */\n\n\n  ClickableComponent.prototype.handleFocus = function handleFocus(event) {\n    on(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  /**\n   * Called when this ClickableComponent has focus and a key gets pressed down. By\n   * default it will call `this.handleClick` when the key is space or enter.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n\n\n  ClickableComponent.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Support Space (32) or Enter (13) key operation to fire a click event\n    if (event.which === 32 || event.which === 13) {\n      event.preventDefault();\n      this.trigger('click');\n    } else if (_Component.prototype.handleKeyPress) {\n\n      // Pass keypress handling up for unsupported keys\n      _Component.prototype.handleKeyPress.call(this, event);\n    }\n  };\n\n  /**\n   * Called when a `ClickableComponent` loses focus. Turns off the listener for\n   * `keydown` events. Which Stops `this.handleKeyPress` from getting called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n\n\n  ClickableComponent.prototype.handleBlur = function handleBlur(event) {\n    off(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  return ClickableComponent;\n}(Component);\n\nComponent.registerComponent('ClickableComponent', ClickableComponent);\n\n/**\n * @file poster-image.js\n */\n/**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n\nvar PosterImage = function (_ClickableComponent) {\n  inherits(PosterImage, _ClickableComponent);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PosterImage(player, options) {\n    classCallCheck(this, PosterImage);\n\n    var _this = possibleConstructorReturn(this, _ClickableComponent.call(this, player, options));\n\n    _this.update();\n    player.on('posterchange', bind(_this, _this.update));\n    return _this;\n  }\n\n  /**\n   * Clean up and dispose of the `PosterImage`.\n   */\n\n\n  PosterImage.prototype.dispose = function dispose() {\n    this.player().off('posterchange', this.update);\n    _ClickableComponent.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create the `PosterImage`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  PosterImage.prototype.createEl = function createEl$$1() {\n    var el = createEl('div', {\n      className: 'vjs-poster',\n\n      // Don't want poster to be tabbable.\n      tabIndex: -1\n    });\n\n    // To ensure the poster image resizes while maintaining its original aspect\n    // ratio, use a div with `background-size` when available. For browsers that\n    // do not support `background-size` (e.g. IE8), fall back on using a regular\n    // img element.\n    if (!BACKGROUND_SIZE_SUPPORTED) {\n      this.fallbackImg_ = createEl('img');\n      el.appendChild(this.fallbackImg_);\n    }\n\n    return el;\n  };\n\n  /**\n   * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n   *\n   * @listens Player#posterchange\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `Player#posterchange` event that triggered this function.\n   */\n\n\n  PosterImage.prototype.update = function update(event) {\n    var url = this.player().poster();\n\n    this.setSrc(url);\n\n    // If there's no poster source we should display:none on this component\n    // so it's not still clickable or right-clickable\n    if (url) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  /**\n   * Set the source of the `PosterImage` depending on the display method.\n   *\n   * @param {string} url\n   *        The URL to the source for the `PosterImage`.\n   */\n\n\n  PosterImage.prototype.setSrc = function setSrc(url) {\n    if (this.fallbackImg_) {\n      this.fallbackImg_.src = url;\n    } else {\n      var backgroundImage = '';\n\n      // Any falsey values should stay as an empty string, otherwise\n      // this will throw an extra error\n      if (url) {\n        backgroundImage = 'url(\"' + url + '\")';\n      }\n\n      this.el_.style.backgroundImage = backgroundImage;\n    }\n  };\n\n  /**\n   * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n   * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n   *\n   * @listens tap\n   * @listens click\n   * @listens keydown\n   *\n   * @param {EventTarget~Event} event\n   +        The `click`, `tap` or `keydown` event that caused this function to be called.\n   */\n\n\n  PosterImage.prototype.handleClick = function handleClick(event) {\n    // We don't want a click to trigger playback when controls are disabled\n    if (!this.player_.controls()) {\n      return;\n    }\n\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  return PosterImage;\n}(ClickableComponent);\n\nComponent.registerComponent('PosterImage', PosterImage);\n\n/**\n * @file text-track-display.js\n */\nvar darkGray = '#222';\nvar lightGray = '#ccc';\nvar fontMap = {\n  monospace: 'monospace',\n  sansSerif: 'sans-serif',\n  serif: 'serif',\n  monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n  monospaceSerif: '\"Courier New\", monospace',\n  proportionalSansSerif: 'sans-serif',\n  proportionalSerif: 'serif',\n  casual: '\"Comic Sans MS\", Impact, fantasy',\n  script: '\"Monotype Corsiva\", cursive',\n  smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n};\n\n/**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n *        Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n *        Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\nfunction constructColor(color, opacity) {\n  var hex = void 0;\n\n  if (color.length === 4) {\n    // color looks like \"#f0e\"\n    hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n  } else if (color.length === 7) {\n    // color looks like \"#f604e2\"\n    hex = color.slice(1);\n  } else {\n    throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n  }\n  return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n}\n\n/**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n *        The DOM element to be styled.\n *\n * @param {string} style\n *        The CSS property on the element that should be styled.\n *\n * @param {string} rule\n *        The style rule that should be applied to the property.\n *\n * @private\n */\nfunction tryUpdateStyle(el, style, rule) {\n  try {\n    el.style[style] = rule;\n  } catch (e) {\n\n    // Satisfies linter.\n    return;\n  }\n}\n\n/**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n\nvar TextTrackDisplay = function (_Component) {\n  inherits(TextTrackDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when `TextTrackDisplay` is ready.\n   */\n  function TextTrackDisplay(player, options, ready) {\n    classCallCheck(this, TextTrackDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options, ready));\n\n    var updateDisplayHandler = bind(_this, _this.updateDisplay);\n\n    player.on('loadstart', bind(_this, _this.toggleDisplay));\n    player.on('texttrackchange', updateDisplayHandler);\n    player.on('loadstart', bind(_this, _this.preselectTrack));\n\n    // This used to be called during player init, but was causing an error\n    // if a track should show by default and the display hadn't loaded yet.\n    // Should probably be moved to an external track loader when we support\n    // tracks that don't need a display.\n    player.ready(bind(_this, function () {\n      if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n        this.hide();\n        return;\n      }\n\n      player.on('fullscreenchange', updateDisplayHandler);\n      player.on('playerresize', updateDisplayHandler);\n\n      if (window.addEventListener) {\n        window.addEventListener('orientationchange', updateDisplayHandler);\n      }\n      player.on('dispose', function () {\n        return window.removeEventListener('orientationchange', updateDisplayHandler);\n      });\n\n      var tracks = this.options_.playerOptions.tracks || [];\n\n      for (var i = 0; i < tracks.length; i++) {\n        this.player_.addRemoteTextTrack(tracks[i], true);\n      }\n\n      this.preselectTrack();\n    }));\n    return _this;\n  }\n\n  /**\n  * Preselect a track following this precedence:\n  * - matches the previously selected {@link TextTrack}'s language and kind\n  * - matches the previously selected {@link TextTrack}'s language only\n  * - is the first default captions track\n  * - is the first default descriptions track\n  *\n  * @listens Player#loadstart\n  */\n\n\n  TextTrackDisplay.prototype.preselectTrack = function preselectTrack() {\n    var modes = { captions: 1, subtitles: 1 };\n    var trackList = this.player_.textTracks();\n    var userPref = this.player_.cache_.selectedLanguage;\n    var firstDesc = void 0;\n    var firstCaptions = void 0;\n    var preferredTrack = void 0;\n\n    for (var i = 0; i < trackList.length; i++) {\n      var track = trackList[i];\n\n      if (userPref && userPref.enabled && userPref.language === track.language) {\n        // Always choose the track that matches both language and kind\n        if (track.kind === userPref.kind) {\n          preferredTrack = track;\n          // or choose the first track that matches language\n        } else if (!preferredTrack) {\n          preferredTrack = track;\n        }\n\n        // clear everything if offTextTrackMenuItem was clicked\n      } else if (userPref && !userPref.enabled) {\n        preferredTrack = null;\n        firstDesc = null;\n        firstCaptions = null;\n      } else if (track['default']) {\n        if (track.kind === 'descriptions' && !firstDesc) {\n          firstDesc = track;\n        } else if (track.kind in modes && !firstCaptions) {\n          firstCaptions = track;\n        }\n      }\n    }\n\n    // The preferredTrack matches the user preference and takes\n    // precendence over all the other tracks.\n    // So, display the preferredTrack before the first default track\n    // and the subtitles/captions track before the descriptions track\n    if (preferredTrack) {\n      preferredTrack.mode = 'showing';\n    } else if (firstCaptions) {\n      firstCaptions.mode = 'showing';\n    } else if (firstDesc) {\n      firstDesc.mode = 'showing';\n    }\n  };\n\n  /**\n   * Turn display of {@link TextTrack}'s from the current state into the other state.\n   * There are only two states:\n   * - 'shown'\n   * - 'hidden'\n   *\n   * @listens Player#loadstart\n   */\n\n\n  TextTrackDisplay.prototype.toggleDisplay = function toggleDisplay() {\n    if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  };\n\n  /**\n   * Create the {@link Component}'s DOM element.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  TextTrackDisplay.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-text-track-display'\n    }, {\n      'aria-live': 'off',\n      'aria-atomic': 'true'\n    });\n  };\n\n  /**\n   * Clear all displayed {@link TextTrack}s.\n   */\n\n\n  TextTrackDisplay.prototype.clearDisplay = function clearDisplay() {\n    if (typeof window.WebVTT === 'function') {\n      window.WebVTT.processCues(window, [], this.el_);\n    }\n  };\n\n  /**\n   * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n   * a {@link Player#fullscreenchange} is fired.\n   *\n   * @listens Player#texttrackchange\n   * @listens Player#fullscreenchange\n   */\n\n\n  TextTrackDisplay.prototype.updateDisplay = function updateDisplay() {\n    var tracks = this.player_.textTracks();\n\n    this.clearDisplay();\n\n    // Track display prioritization model: if multiple tracks are 'showing',\n    //  display the first 'subtitles' or 'captions' track which is 'showing',\n    //  otherwise display the first 'descriptions' track which is 'showing'\n\n    var descriptionsTrack = null;\n    var captionsSubtitlesTrack = null;\n    var i = tracks.length;\n\n    while (i--) {\n      var track = tracks[i];\n\n      if (track.mode === 'showing') {\n        if (track.kind === 'descriptions') {\n          descriptionsTrack = track;\n        } else {\n          captionsSubtitlesTrack = track;\n        }\n      }\n    }\n\n    if (captionsSubtitlesTrack) {\n      if (this.getAttribute('aria-live') !== 'off') {\n        this.setAttribute('aria-live', 'off');\n      }\n      this.updateForTrack(captionsSubtitlesTrack);\n    } else if (descriptionsTrack) {\n      if (this.getAttribute('aria-live') !== 'assertive') {\n        this.setAttribute('aria-live', 'assertive');\n      }\n      this.updateForTrack(descriptionsTrack);\n    }\n  };\n\n  /**\n   * Add an {@link Texttrack} to to the {@link Tech}s {@link TextTrackList}.\n   *\n   * @param {TextTrack} track\n   *        Text track object to be added to the list.\n   */\n\n\n  TextTrackDisplay.prototype.updateForTrack = function updateForTrack(track) {\n    if (typeof window.WebVTT !== 'function' || !track.activeCues) {\n      return;\n    }\n\n    var cues = [];\n\n    for (var _i = 0; _i < track.activeCues.length; _i++) {\n      cues.push(track.activeCues[_i]);\n    }\n\n    window.WebVTT.processCues(window, cues, this.el_);\n\n    if (!this.player_.textTrackSettings) {\n      return;\n    }\n\n    var overrides = this.player_.textTrackSettings.getValues();\n\n    var i = cues.length;\n\n    while (i--) {\n      var cue = cues[i];\n\n      if (!cue) {\n        continue;\n      }\n\n      var cueDiv = cue.displayState;\n\n      if (overrides.color) {\n        cueDiv.firstChild.style.color = overrides.color;\n      }\n      if (overrides.textOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n      }\n      if (overrides.backgroundColor) {\n        cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n      }\n      if (overrides.backgroundOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n      }\n      if (overrides.windowColor) {\n        if (overrides.windowOpacity) {\n          tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n        } else {\n          cueDiv.style.backgroundColor = overrides.windowColor;\n        }\n      }\n      if (overrides.edgeStyle) {\n        if (overrides.edgeStyle === 'dropshadow') {\n          cueDiv.firstChild.style.textShadow = '2px 2px 3px ' + darkGray + ', 2px 2px 4px ' + darkGray + ', 2px 2px 5px ' + darkGray;\n        } else if (overrides.edgeStyle === 'raised') {\n          cueDiv.firstChild.style.textShadow = '1px 1px ' + darkGray + ', 2px 2px ' + darkGray + ', 3px 3px ' + darkGray;\n        } else if (overrides.edgeStyle === 'depressed') {\n          cueDiv.firstChild.style.textShadow = '1px 1px ' + lightGray + ', 0 1px ' + lightGray + ', -1px -1px ' + darkGray + ', 0 -1px ' + darkGray;\n        } else if (overrides.edgeStyle === 'uniform') {\n          cueDiv.firstChild.style.textShadow = '0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray;\n        }\n      }\n      if (overrides.fontPercent && overrides.fontPercent !== 1) {\n        var fontSize = window.parseFloat(cueDiv.style.fontSize);\n\n        cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n        cueDiv.style.height = 'auto';\n        cueDiv.style.top = 'auto';\n        cueDiv.style.bottom = '2px';\n      }\n      if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n        if (overrides.fontFamily === 'small-caps') {\n          cueDiv.firstChild.style.fontVariant = 'small-caps';\n        } else {\n          cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n        }\n      }\n    }\n  };\n\n  return TextTrackDisplay;\n}(Component);\n\nComponent.registerComponent('TextTrackDisplay', TextTrackDisplay);\n\n/**\n * @file loading-spinner.js\n */\n/**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n\nvar LoadingSpinner = function (_Component) {\n  inherits(LoadingSpinner, _Component);\n\n  function LoadingSpinner() {\n    classCallCheck(this, LoadingSpinner);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the `LoadingSpinner`s DOM element.\n   *\n   * @return {Element}\n   *         The dom element that gets created.\n   */\n  LoadingSpinner.prototype.createEl = function createEl$$1() {\n    var isAudio = this.player_.isAudio();\n    var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n    var controlText = createEl('span', {\n      className: 'vjs-control-text',\n      innerHTML: this.localize('{1} is loading.', [playerType])\n    });\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-loading-spinner',\n      dir: 'ltr'\n    });\n\n    el.appendChild(controlText);\n\n    return el;\n  };\n\n  return LoadingSpinner;\n}(Component);\n\nComponent.registerComponent('LoadingSpinner', LoadingSpinner);\n\n/**\n * @file button.js\n */\n/**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n\nvar Button = function (_ClickableComponent) {\n  inherits(Button, _ClickableComponent);\n\n  function Button() {\n    classCallCheck(this, Button);\n    return possibleConstructorReturn(this, _ClickableComponent.apply(this, arguments));\n  }\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} [tag=\"button\"]\n   *        The element's node type. This argument is IGNORED: no matter what\n   *        is passed, it will always create a `button` element.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  Button.prototype.createEl = function createEl(tag) {\n    var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    tag = 'button';\n\n    props = assign({\n      innerHTML: '<span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>',\n      className: this.buildCSSClass()\n    }, props);\n\n    // Add attributes for button element\n    attributes = assign({\n\n      // Necessary since the default button type is \"submit\"\n      type: 'button'\n    }, attributes);\n\n    var el = Component.prototype.createEl.call(this, tag, props, attributes);\n\n    this.createControlTextEl(el);\n\n    return el;\n  };\n\n  /**\n   * Add a child `Component` inside of this `Button`.\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   *\n   * @deprecated since version 5\n   */\n\n\n  Button.prototype.addChild = function addChild(child) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    var className = this.constructor.name;\n\n    log.warn('Adding an actionable (user controllable) child to a Button (' + className + ') is not supported; use a ClickableComponent instead.');\n\n    // Avoid the error message generated by ClickableComponent's addChild method\n    return Component.prototype.addChild.call(this, child, options);\n  };\n\n  /**\n   * Enable the `Button` element so that it can be activated or clicked. Use this with\n   * {@link Button#disable}.\n   */\n\n\n  Button.prototype.enable = function enable() {\n    _ClickableComponent.prototype.enable.call(this);\n    this.el_.removeAttribute('disabled');\n  };\n\n  /**\n   * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n   * {@link Button#enable}.\n   */\n\n\n  Button.prototype.disable = function disable() {\n    _ClickableComponent.prototype.disable.call(this);\n    this.el_.setAttribute('disabled', 'disabled');\n  };\n\n  /**\n   * This gets called when a `Button` has focus and `keydown` is triggered via a key\n   * press.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to get called.\n   *\n   * @listens keydown\n   */\n\n\n  Button.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Ignore Space (32) or Enter (13) key operation, which is handled by the browser for a button.\n    if (event.which === 32 || event.which === 13) {\n      return;\n    }\n\n    // Pass keypress handling up for unsupported keys\n    _ClickableComponent.prototype.handleKeyPress.call(this, event);\n  };\n\n  return Button;\n}(ClickableComponent);\n\nComponent.registerComponent('Button', Button);\n\n/**\n * @file big-play-button.js\n */\n/**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n\nvar BigPlayButton = function (_Button) {\n  inherits(BigPlayButton, _Button);\n\n  function BigPlayButton(player, options) {\n    classCallCheck(this, BigPlayButton);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.mouseused_ = false;\n\n    _this.on('mousedown', _this.handleMouseDown);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n   */\n\n\n  BigPlayButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-big-play-button';\n  };\n\n  /**\n   * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  BigPlayButton.prototype.handleClick = function handleClick(event) {\n    var playPromise = this.player_.play();\n\n    // exit early if clicked via the mouse\n    if (this.mouseused_ && event.clientX && event.clientY) {\n      silencePromise(playPromise);\n      return;\n    }\n\n    var cb = this.player_.getChild('controlBar');\n    var playToggle = cb && cb.getChild('playToggle');\n\n    if (!playToggle) {\n      this.player_.focus();\n      return;\n    }\n\n    var playFocus = function playFocus() {\n      return playToggle.focus();\n    };\n\n    if (isPromise(playPromise)) {\n      playPromise.then(playFocus, function () {});\n    } else {\n      this.setTimeout(playFocus, 1);\n    }\n  };\n\n  BigPlayButton.prototype.handleKeyPress = function handleKeyPress(event) {\n    this.mouseused_ = false;\n\n    _Button.prototype.handleKeyPress.call(this, event);\n  };\n\n  BigPlayButton.prototype.handleMouseDown = function handleMouseDown(event) {\n    this.mouseused_ = true;\n  };\n\n  return BigPlayButton;\n}(Button);\n\n/**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n */\n\n\nBigPlayButton.prototype.controlText_ = 'Play Video';\n\nComponent.registerComponent('BigPlayButton', BigPlayButton);\n\n/**\n * @file close-button.js\n */\n/**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n\nvar CloseButton = function (_Button) {\n  inherits(CloseButton, _Button);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function CloseButton(player, options) {\n    classCallCheck(this, CloseButton);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.controlText(options && options.controlText || _this.localize('Close'));\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  CloseButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-close-button ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * This gets called when a `CloseButton` gets clicked. See\n   * {@link ClickableComponent#handleClick} for more information on when this will be\n   * triggered\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @fires CloseButton#close\n   */\n\n\n  CloseButton.prototype.handleClick = function handleClick(event) {\n\n    /**\n     * Triggered when the a `CloseButton` is clicked.\n     *\n     * @event CloseButton#close\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up to parents if there is no listener\n     */\n    this.trigger({ type: 'close', bubbles: false });\n  };\n\n  return CloseButton;\n}(Button);\n\nComponent.registerComponent('CloseButton', CloseButton);\n\n/**\n * @file play-toggle.js\n */\n/**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n\nvar PlayToggle = function (_Button) {\n  inherits(PlayToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlayToggle(player, options) {\n    classCallCheck(this, PlayToggle);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.on(player, 'play', _this.handlePlay);\n    _this.on(player, 'pause', _this.handlePause);\n    _this.on(player, 'ended', _this.handleEnded);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  PlayToggle.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-play-control ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * This gets called when an `PlayToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  PlayToggle.prototype.handleClick = function handleClick(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  /**\n   * This gets called once after the video has ended and the user seeks so that\n   * we can change the replay button back to a play button.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#seeked\n   */\n\n\n  PlayToggle.prototype.handleSeeked = function handleSeeked(event) {\n    this.removeClass('vjs-ended');\n\n    if (this.player_.paused()) {\n      this.handlePause(event);\n    } else {\n      this.handlePlay(event);\n    }\n  };\n\n  /**\n   * Add the vjs-playing class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#play\n   */\n\n\n  PlayToggle.prototype.handlePlay = function handlePlay(event) {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing');\n    // change the button text to \"Pause\"\n    this.controlText('Pause');\n  };\n\n  /**\n   * Add the vjs-paused class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#pause\n   */\n\n\n  PlayToggle.prototype.handlePause = function handlePause(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    // change the button text to \"Play\"\n    this.controlText('Play');\n  };\n\n  /**\n   * Add the vjs-ended class to the element so it can change appearance\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  PlayToggle.prototype.handleEnded = function handleEnded(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-ended');\n    // change the button text to \"Replay\"\n    this.controlText('Replay');\n\n    // on the next seek remove the replay button\n    this.one(this.player_, 'seeked', this.handleSeeked);\n  };\n\n  return PlayToggle;\n}(Button);\n\n/**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlayToggle.prototype.controlText_ = 'Play';\n\nComponent.registerComponent('PlayToggle', PlayToggle);\n\n/**\n * @file format-time.js\n * @module format-time\n */\n\n/**\n* Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in seconds)\n* will force a number of leading zeros to cover the length of the guide.\n*\n* @param {number} seconds\n*        Number of seconds to be turned into a string\n*\n* @param {number} guide\n*        Number (in seconds) to model the string after\n*\n* @return {string}\n*         Time formatted as H:MM:SS or M:SS\n*/\nvar defaultImplementation = function defaultImplementation(seconds, guide) {\n  seconds = seconds < 0 ? 0 : seconds;\n  var s = Math.floor(seconds % 60);\n  var m = Math.floor(seconds / 60 % 60);\n  var h = Math.floor(seconds / 3600);\n  var gm = Math.floor(guide / 60 % 60);\n  var gh = Math.floor(guide / 3600);\n\n  // handle invalid times\n  if (isNaN(seconds) || seconds === Infinity) {\n    // '-' is false for all relational operators (e.g. <, >=) so this setting\n    // will add the minimum number of fields specified by the guide\n    h = m = s = '-';\n  }\n\n  // Check if we need to show hours\n  h = h > 0 || gh > 0 ? h + ':' : '';\n\n  // If hours are showing, we may need to add a leading zero.\n  // Always show at least one digit of minutes.\n  m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':';\n\n  // Check if leading zero is need for seconds\n  s = s < 10 ? '0' + s : s;\n\n  return h + m + s;\n};\n\nvar implementation = defaultImplementation;\n\n/**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n *        A function which will be used in place of the default formatTime implementation.\n *        Will receive the current time in seconds and the guide (in seconds) as arguments.\n */\nfunction setFormatTime(customImplementation) {\n  implementation = customImplementation;\n}\n\n/**\n * Resets formatTime to the default implementation.\n */\nfunction resetFormatTime() {\n  implementation = defaultImplementation;\n}\n\nvar formatTime = function (seconds) {\n  var guide = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : seconds;\n\n  return implementation(seconds, guide);\n};\n\n/**\n * @file time-display.js\n */\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar TimeDisplay = function (_Component) {\n  inherits(TimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeDisplay(player, options) {\n    classCallCheck(this, TimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.throttledUpdateContent = throttle(bind(_this, _this.updateContent), 25);\n    _this.on(player, 'timeupdate', _this.throttledUpdateContent);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  TimeDisplay.prototype.createEl = function createEl$$1(plainName) {\n    var className = this.buildCSSClass();\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: className + ' vjs-time-control vjs-control',\n      innerHTML: '<span class=\"vjs-control-text\">' + this.localize(this.labelText_) + '\\xA0</span>'\n    });\n\n    this.contentEl_ = createEl('span', {\n      className: className + '-display'\n    }, {\n      // tell screen readers not to automatically read the time as it changes\n      'aria-live': 'off'\n    });\n\n    this.updateTextNode_();\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  TimeDisplay.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.textNode_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Updates the \"remaining time\" text node with new content using the\n   * contents of the `formattedTime_` property.\n   *\n   * @private\n   */\n\n\n  TimeDisplay.prototype.updateTextNode_ = function updateTextNode_() {\n    if (!this.contentEl_) {\n      return;\n    }\n\n    while (this.contentEl_.firstChild) {\n      this.contentEl_.removeChild(this.contentEl_.firstChild);\n    }\n\n    this.textNode_ = document.createTextNode(this.formattedTime_ || this.formatTime_(0));\n    this.contentEl_.appendChild(this.textNode_);\n  };\n\n  /**\n   * Generates a formatted time for this component to use in display.\n   *\n   * @param  {number} time\n   *         A numeric time, in seconds.\n   *\n   * @return {string}\n   *         A formatted time\n   *\n   * @private\n   */\n\n\n  TimeDisplay.prototype.formatTime_ = function formatTime_(time) {\n    return formatTime(time);\n  };\n\n  /**\n   * Updates the time display text node if it has what was passed in changed\n   * the formatted time.\n   *\n   * @param {number} time\n   *        The time to update to\n   *\n   * @private\n   */\n\n\n  TimeDisplay.prototype.updateFormattedTime_ = function updateFormattedTime_(time) {\n    var formattedTime = this.formatTime_(time);\n\n    if (formattedTime === this.formattedTime_) {\n      return;\n    }\n\n    this.formattedTime_ = formattedTime;\n    this.requestAnimationFrame(this.updateTextNode_);\n  };\n\n  /**\n   * To be filled out in the child class, should update the displayed time\n   * in accordance with the fact that the current time has changed.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate`  event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   */\n\n\n  TimeDisplay.prototype.updateContent = function updateContent(event) {};\n\n  return TimeDisplay;\n}(Component);\n\n/**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nTimeDisplay.prototype.labelText_ = 'Time';\n\n/**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nTimeDisplay.prototype.controlText_ = 'Time';\n\nComponent.registerComponent('TimeDisplay', TimeDisplay);\n\n/**\n * @file current-time-display.js\n */\n/**\n * Displays the current time\n *\n * @extends Component\n */\n\nvar CurrentTimeDisplay = function (_TimeDisplay) {\n  inherits(CurrentTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CurrentTimeDisplay(player, options) {\n    classCallCheck(this, CurrentTimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));\n\n    _this.on(player, 'ended', _this.handleEnded);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  CurrentTimeDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-current-time';\n  };\n\n  /**\n   * Update current time display\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` event that caused this function to run.\n   *\n   * @listens Player#timeupdate\n   */\n\n\n  CurrentTimeDisplay.prototype.updateContent = function updateContent(event) {\n    // Allows for smooth scrubbing, when player can't keep up.\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n\n    this.updateFormattedTime_(time);\n  };\n\n  /**\n   * When the player fires ended there should be no time left. Sadly\n   * this is not always the case, lets make it seem like that is the case\n   * for users.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  CurrentTimeDisplay.prototype.handleEnded = function handleEnded(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n    this.updateFormattedTime_(this.player_.duration());\n  };\n\n  return CurrentTimeDisplay;\n}(TimeDisplay);\n\n/**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nCurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n\n/**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nCurrentTimeDisplay.prototype.controlText_ = 'Current Time';\n\nComponent.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n\n/**\n * @file duration-display.js\n */\n/**\n * Displays the duration\n *\n * @extends Component\n */\n\nvar DurationDisplay = function (_TimeDisplay) {\n  inherits(DurationDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function DurationDisplay(player, options) {\n    classCallCheck(this, DurationDisplay);\n\n    // we do not want to/need to throttle duration changes,\n    // as they should always display the changed duration as\n    // it has changed\n    var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));\n\n    _this.on(player, 'durationchange', _this.updateContent);\n\n    // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n    // listeners could have broken dependent applications/libraries. These\n    // can likely be removed for 7.0.\n    _this.on(player, 'loadedmetadata', _this.throttledUpdateContent);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  DurationDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-duration';\n  };\n\n  /**\n   * Update duration time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n   *        this function to be called.\n   *\n   * @listens Player#durationchange\n   * @listens Player#timeupdate\n   * @listens Player#loadedmetadata\n   */\n\n\n  DurationDisplay.prototype.updateContent = function updateContent(event) {\n    var duration = this.player_.duration();\n\n    if (duration && this.duration_ !== duration) {\n      this.duration_ = duration;\n      this.updateFormattedTime_(duration);\n    }\n  };\n\n  return DurationDisplay;\n}(TimeDisplay);\n\n/**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nDurationDisplay.prototype.labelText_ = 'Duration';\n\n/**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nDurationDisplay.prototype.controlText_ = 'Duration';\n\nComponent.registerComponent('DurationDisplay', DurationDisplay);\n\n/**\n * @file time-divider.js\n */\n/**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n\nvar TimeDivider = function (_Component) {\n  inherits(TimeDivider, _Component);\n\n  function TimeDivider() {\n    classCallCheck(this, TimeDivider);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the component's DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  TimeDivider.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-control vjs-time-divider',\n      innerHTML: '<div><span>/</span></div>'\n    });\n  };\n\n  return TimeDivider;\n}(Component);\n\nComponent.registerComponent('TimeDivider', TimeDivider);\n\n/**\n * @file remaining-time-display.js\n */\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar RemainingTimeDisplay = function (_TimeDisplay) {\n  inherits(RemainingTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function RemainingTimeDisplay(player, options) {\n    classCallCheck(this, RemainingTimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));\n\n    _this.on(player, 'durationchange', _this.throttledUpdateContent);\n    _this.on(player, 'ended', _this.handleEnded);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  RemainingTimeDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-remaining-time';\n  };\n\n  /**\n   * The remaining time display prefixes numbers with a \"minus\" character.\n   *\n   * @param  {number} time\n   *         A numeric time, in seconds.\n   *\n   * @return {string}\n   *         A formatted time\n   *\n   * @private\n   */\n\n\n  RemainingTimeDisplay.prototype.formatTime_ = function formatTime_(time) {\n    // TODO: The \"-\" should be decorative, and not announced by a screen reader\n    return '-' + _TimeDisplay.prototype.formatTime_.call(this, time);\n  };\n\n  /**\n   * Update remaining time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `durationchange` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   * @listens Player#durationchange\n   */\n\n\n  RemainingTimeDisplay.prototype.updateContent = function updateContent(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n\n    // @deprecated We should only use remainingTimeDisplay\n    // as of video.js 7\n    if (this.player_.remainingTimeDisplay) {\n      this.updateFormattedTime_(this.player_.remainingTimeDisplay());\n    } else {\n      this.updateFormattedTime_(this.player_.remainingTime());\n    }\n  };\n\n  /**\n   * When the player fires ended there should be no time left. Sadly\n   * this is not always the case, lets make it seem like that is the case\n   * for users.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  RemainingTimeDisplay.prototype.handleEnded = function handleEnded(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n    this.updateFormattedTime_(0);\n  };\n\n  return RemainingTimeDisplay;\n}(TimeDisplay);\n\n/**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nRemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n\n/**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nRemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\n\nComponent.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n\n/**\n * @file live-display.js\n */\n// TODO - Future make it click to snap to live\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar LiveDisplay = function (_Component) {\n  inherits(LiveDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LiveDisplay(player, options) {\n    classCallCheck(this, LiveDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.updateShowing();\n    _this.on(_this.player(), 'durationchange', _this.updateShowing);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  LiveDisplay.prototype.createEl = function createEl$$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-live-control vjs-control'\n    });\n\n    this.contentEl_ = createEl('div', {\n      className: 'vjs-live-display',\n      innerHTML: '<span class=\"vjs-control-text\">' + this.localize('Stream Type') + '\\xA0</span>' + this.localize('LIVE')\n    }, {\n      'aria-live': 'off'\n    });\n\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  LiveDisplay.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n   * it accordingly\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#durationchange} event that caused this function to run.\n   *\n   * @listens Player#durationchange\n   */\n\n\n  LiveDisplay.prototype.updateShowing = function updateShowing(event) {\n    if (this.player().duration() === Infinity) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  return LiveDisplay;\n}(Component);\n\nComponent.registerComponent('LiveDisplay', LiveDisplay);\n\n/**\n * @file slider.js\n */\n/**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n\nvar Slider = function (_Component) {\n  inherits(Slider, _Component);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function Slider(player, options) {\n    classCallCheck(this, Slider);\n\n    // Set property names to bar to match with the child Slider class is looking for\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.bar = _this.getChild(_this.options_.barName);\n\n    // Set a horizontal or vertical class on the slider depending on the slider type\n    _this.vertical(!!_this.options_.vertical);\n\n    _this.enable();\n    return _this;\n  }\n\n  /**\n   * Are controls are currently enabled for this slider or not.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  Slider.prototype.enabled = function enabled() {\n    return this.enabled_;\n  };\n\n  /**\n   * Enable controls for this slider if they are disabled\n   */\n\n\n  Slider.prototype.enable = function enable() {\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on('mousedown', this.handleMouseDown);\n    this.on('touchstart', this.handleMouseDown);\n    this.on('focus', this.handleFocus);\n    this.on('blur', this.handleBlur);\n    this.on('click', this.handleClick);\n\n    this.on(this.player_, 'controlsvisible', this.update);\n\n    if (this.playerEvent) {\n      this.on(this.player_, this.playerEvent, this.update);\n    }\n\n    this.removeClass('disabled');\n    this.setAttribute('tabindex', 0);\n\n    this.enabled_ = true;\n  };\n\n  /**\n   * Disable controls for this slider if they are enabled\n   */\n\n\n  Slider.prototype.disable = function disable() {\n    if (!this.enabled()) {\n      return;\n    }\n    var doc = this.bar.el_.ownerDocument;\n\n    this.off('mousedown', this.handleMouseDown);\n    this.off('touchstart', this.handleMouseDown);\n    this.off('focus', this.handleFocus);\n    this.off('blur', this.handleBlur);\n    this.off('click', this.handleClick);\n    this.off(this.player_, 'controlsvisible', this.update);\n    this.off(doc, 'mousemove', this.handleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchmove', this.handleMouseMove);\n    this.off(doc, 'touchend', this.handleMouseUp);\n    this.removeAttribute('tabindex');\n\n    this.addClass('disabled');\n\n    if (this.playerEvent) {\n      this.off(this.player_, this.playerEvent, this.update);\n    }\n    this.enabled_ = false;\n  };\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} type\n   *        Type of element to create.\n   *\n   * @param {Object} [props={}]\n   *        List of properties in Object form.\n   *\n   * @param {Object} [attributes={}]\n   *        list of attributes in Object form.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  Slider.prototype.createEl = function createEl$$1(type) {\n    var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    // Add the slider element class to all sub classes\n    props.className = props.className + ' vjs-slider';\n    props = assign({\n      tabIndex: 0\n    }, props);\n\n    attributes = assign({\n      'role': 'slider',\n      'aria-valuenow': 0,\n      'aria-valuemin': 0,\n      'aria-valuemax': 100,\n      'tabIndex': 0\n    }, attributes);\n\n    return _Component.prototype.createEl.call(this, type, props, attributes);\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   * @fires Slider#slideractive\n   */\n\n\n  Slider.prototype.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.bar.el_.ownerDocument;\n\n    if (event.type === 'mousedown') {\n      event.preventDefault();\n    }\n    // Do not call preventDefault() on touchstart in Chrome\n    // to avoid console warnings. Use a 'touch-action: none' style\n    // instead to prevent unintented scrolling.\n    // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n    if (event.type === 'touchstart' && !IS_CHROME) {\n      event.preventDefault();\n    }\n    blockTextSelection();\n\n    this.addClass('vjs-sliding');\n    /**\n     * Triggered when the slider is in an active state\n     *\n     * @event Slider#slideractive\n     * @type {EventTarget~Event}\n     */\n    this.trigger('slideractive');\n\n    this.on(doc, 'mousemove', this.handleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchmove', this.handleMouseMove);\n    this.on(doc, 'touchend', this.handleMouseUp);\n\n    this.handleMouseMove(event);\n  };\n\n  /**\n   * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n   * The `mousemove` and `touchmove` events will only only trigger this function during\n   * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n   * {@link Slider#handleMouseUp}.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n   *        this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n\n\n  Slider.prototype.handleMouseMove = function handleMouseMove(event) {};\n\n  /**\n   * Handle `mouseup` or `touchend` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   * @fires Slider#sliderinactive\n   */\n\n\n  Slider.prototype.handleMouseUp = function handleMouseUp() {\n    var doc = this.bar.el_.ownerDocument;\n\n    unblockTextSelection();\n\n    this.removeClass('vjs-sliding');\n    /**\n     * Triggered when the slider is no longer in an active state.\n     *\n     * @event Slider#sliderinactive\n     * @type {EventTarget~Event}\n     */\n    this.trigger('sliderinactive');\n\n    this.off(doc, 'mousemove', this.handleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchmove', this.handleMouseMove);\n    this.off(doc, 'touchend', this.handleMouseUp);\n\n    this.update();\n  };\n\n  /**\n   * Update the progress bar of the `Slider`.\n   *\n   * @returns {number}\n   *          The percentage of progress the progress bar represents as a\n   *          number from 0 to 1.\n   */\n\n\n  Slider.prototype.update = function update() {\n\n    // In VolumeBar init we have a setTimeout for update that pops and update\n    // to the end of the execution stack. The player is destroyed before then\n    // update will cause an error\n    if (!this.el_) {\n      return;\n    }\n\n    // If scrubbing, we could use a cached value to make the handle keep up\n    // with the user's mouse. On HTML5 browsers scrubbing is really smooth, but\n    // some flash players are slow, so we might want to utilize this later.\n    // var progress =  (this.player_.scrubbing()) ? this.player_.getCache().currentTime / this.player_.duration() : this.player_.currentTime() / this.player_.duration();\n    var progress = this.getPercent();\n    var bar = this.bar;\n\n    // If there's no bar...\n    if (!bar) {\n      return;\n    }\n\n    // Protect against no duration and other division issues\n    if (typeof progress !== 'number' || progress !== progress || progress < 0 || progress === Infinity) {\n      progress = 0;\n    }\n\n    // Convert to a percentage for setting\n    var percentage = (progress * 100).toFixed(2) + '%';\n    var style = bar.el().style;\n\n    // Set the new bar width or height\n    if (this.vertical()) {\n      style.height = percentage;\n    } else {\n      style.width = percentage;\n    }\n\n    return progress;\n  };\n\n  /**\n   * Calculate distance for slider\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @return {number}\n   *         The current position of the Slider.\n   *         - postition.x for vertical `Slider`s\n   *         - postition.y for horizontal `Slider`s\n   */\n\n\n  Slider.prototype.calculateDistance = function calculateDistance(event) {\n    var position = getPointerPosition(this.el_, event);\n\n    if (this.vertical()) {\n      return position.y;\n    }\n    return position.x;\n  };\n\n  /**\n   * Handle a `focus` event on this `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `focus` event that caused this function to run.\n   *\n   * @listens focus\n   */\n\n\n  Slider.prototype.handleFocus = function handleFocus() {\n    this.on(this.bar.el_.ownerDocument, 'keydown', this.handleKeyPress);\n  };\n\n  /**\n   * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down\n   * arrow keys. This function will only be called when the slider has focus. See\n   * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n   *\n   * @param {EventTarget~Event} event\n   *        the `keydown` event that caused this function to run.\n   *\n   * @listens keydown\n   */\n\n\n  Slider.prototype.handleKeyPress = function handleKeyPress(event) {\n    // Left and Down Arrows\n    if (event.which === 37 || event.which === 40) {\n      event.preventDefault();\n      this.stepBack();\n\n      // Up and Right Arrows\n    } else if (event.which === 38 || event.which === 39) {\n      event.preventDefault();\n      this.stepForward();\n    }\n  };\n\n  /**\n   * Handle a `blur` event on this `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to run.\n   *\n   * @listens blur\n   */\n\n  Slider.prototype.handleBlur = function handleBlur() {\n    this.off(this.bar.el_.ownerDocument, 'keydown', this.handleKeyPress);\n  };\n\n  /**\n   * Listener for click events on slider, used to prevent clicks\n   *   from bubbling up to parent elements like button menus.\n   *\n   * @param {Object} event\n   *        Event that caused this object to run\n   */\n\n\n  Slider.prototype.handleClick = function handleClick(event) {\n    event.stopImmediatePropagation();\n    event.preventDefault();\n  };\n\n  /**\n   * Get/set if slider is horizontal for vertical\n   *\n   * @param {boolean} [bool]\n   *        - true if slider is vertical,\n   *        - false is horizontal\n   *\n   * @return {boolean}\n   *         - true if slider is vertical, and getting\n   *         - false if the slider is horizontal, and getting\n   */\n\n\n  Slider.prototype.vertical = function vertical(bool) {\n    if (bool === undefined) {\n      return this.vertical_ || false;\n    }\n\n    this.vertical_ = !!bool;\n\n    if (this.vertical_) {\n      this.addClass('vjs-slider-vertical');\n    } else {\n      this.addClass('vjs-slider-horizontal');\n    }\n  };\n\n  return Slider;\n}(Component);\n\nComponent.registerComponent('Slider', Slider);\n\n/**\n * @file load-progress-bar.js\n */\n/**\n * Shows loading progress\n *\n * @extends Component\n */\n\nvar LoadProgressBar = function (_Component) {\n  inherits(LoadProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LoadProgressBar(player, options) {\n    classCallCheck(this, LoadProgressBar);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.partEls_ = [];\n    _this.on(player, 'progress', _this.update);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  LoadProgressBar.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-load-progress',\n      innerHTML: '<span class=\"vjs-control-text\"><span>' + this.localize('Loaded') + '</span>: 0%</span>'\n    });\n  };\n\n  LoadProgressBar.prototype.dispose = function dispose() {\n    this.partEls_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Update progress bar\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `progress` event that caused this function to run.\n   *\n   * @listens Player#progress\n   */\n\n\n  LoadProgressBar.prototype.update = function update(event) {\n    var buffered = this.player_.buffered();\n    var duration = this.player_.duration();\n    var bufferedEnd = this.player_.bufferedEnd();\n    var children = this.partEls_;\n\n    // get the percent width of a time compared to the total end\n    var percentify = function percentify(time, end) {\n      // no NaN\n      var percent = time / end || 0;\n\n      return (percent >= 1 ? 1 : percent) * 100 + '%';\n    };\n\n    // update the width of the progress bar\n    this.el_.style.width = percentify(bufferedEnd, duration);\n\n    // add child elements to represent the individual buffered time ranges\n    for (var i = 0; i < buffered.length; i++) {\n      var start = buffered.start(i);\n      var end = buffered.end(i);\n      var part = children[i];\n\n      if (!part) {\n        part = this.el_.appendChild(createEl());\n        children[i] = part;\n      }\n\n      // set the percent based on the width of the progress bar (bufferedEnd)\n      part.style.left = percentify(start, bufferedEnd);\n      part.style.width = percentify(end - start, bufferedEnd);\n    }\n\n    // remove unused buffered range elements\n    for (var _i = children.length; _i > buffered.length; _i--) {\n      this.el_.removeChild(children[_i - 1]);\n    }\n    children.length = buffered.length;\n  };\n\n  return LoadProgressBar;\n}(Component);\n\nComponent.registerComponent('LoadProgressBar', LoadProgressBar);\n\n/**\n * @file time-tooltip.js\n */\n/**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n\nvar TimeTooltip = function (_Component) {\n  inherits(TimeTooltip, _Component);\n\n  function TimeTooltip() {\n    classCallCheck(this, TimeTooltip);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the time tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  TimeTooltip.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-tooltip'\n    });\n  };\n\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n\n\n  TimeTooltip.prototype.update = function update(seekBarRect, seekBarPoint, content) {\n    var tooltipRect = getBoundingClientRect(this.el_);\n    var playerRect = getBoundingClientRect(this.player_.el());\n    var seekBarPointPx = seekBarRect.width * seekBarPoint;\n\n    // do nothing if either rect isn't available\n    // for example, if the player isn't in the DOM for testing\n    if (!playerRect || !tooltipRect) {\n      return;\n    }\n\n    // This is the space left of the `seekBarPoint` available within the bounds\n    // of the player. We calculate any gap between the left edge of the player\n    // and the left edge of the `SeekBar` and add the number of pixels in the\n    // `SeekBar` before hitting the `seekBarPoint`\n    var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx;\n\n    // This is the space right of the `seekBarPoint` available within the bounds\n    // of the player. We calculate the number of pixels from the `seekBarPoint`\n    // to the right edge of the `SeekBar` and add to that any gap between the\n    // right edge of the `SeekBar` and the player.\n    var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right);\n\n    // This is the number of pixels by which the tooltip will need to be pulled\n    // further to the right to center it over the `seekBarPoint`.\n    var pullTooltipBy = tooltipRect.width / 2;\n\n    // Adjust the `pullTooltipBy` distance to the left or right depending on\n    // the results of the space calculations above.\n    if (spaceLeftOfPoint < pullTooltipBy) {\n      pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n    } else if (spaceRightOfPoint < pullTooltipBy) {\n      pullTooltipBy = spaceRightOfPoint;\n    }\n\n    // Due to the imprecision of decimal/ratio based calculations and varying\n    // rounding behaviors, there are cases where the spacing adjustment is off\n    // by a pixel or two. This adds insurance to these calculations.\n    if (pullTooltipBy < 0) {\n      pullTooltipBy = 0;\n    } else if (pullTooltipBy > tooltipRect.width) {\n      pullTooltipBy = tooltipRect.width;\n    }\n\n    this.el_.style.right = '-' + pullTooltipBy + 'px';\n    textContent(this.el_, content);\n  };\n\n  return TimeTooltip;\n}(Component);\n\nComponent.registerComponent('TimeTooltip', TimeTooltip);\n\n/**\n * @file play-progress-bar.js\n */\n/**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar PlayProgressBar = function (_Component) {\n  inherits(PlayProgressBar, _Component);\n\n  function PlayProgressBar() {\n    classCallCheck(this, PlayProgressBar);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  PlayProgressBar.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-play-progress vjs-slider-bar',\n      innerHTML: '<span class=\"vjs-control-text\"><span>' + this.localize('Progress') + '</span>: 0%</span>'\n    });\n  };\n\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n\n\n  PlayProgressBar.prototype.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    // If there is an existing rAF ID, cancel it so we don't over-queue.\n    if (this.rafId_) {\n      this.cancelAnimationFrame(this.rafId_);\n    }\n\n    this.rafId_ = this.requestAnimationFrame(function () {\n      var time = _this2.player_.scrubbing() ? _this2.player_.getCache().currentTime : _this2.player_.currentTime();\n\n      var content = formatTime(time, _this2.player_.duration());\n      var timeTooltip = _this2.getChild('timeTooltip');\n\n      if (timeTooltip) {\n        timeTooltip.update(seekBarRect, seekBarPoint, content);\n      }\n    });\n  };\n\n  return PlayProgressBar;\n}(Component);\n\n/**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n\n\nPlayProgressBar.prototype.options_ = {\n  children: []\n};\n\n// Time tooltips should not be added to a player on mobile devices or IE8\nif ((!IE_VERSION || IE_VERSION > 8) && !IS_IOS && !IS_ANDROID) {\n  PlayProgressBar.prototype.options_.children.push('timeTooltip');\n}\n\nComponent.registerComponent('PlayProgressBar', PlayProgressBar);\n\n/**\n * @file mouse-time-display.js\n */\n/**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar MouseTimeDisplay = function (_Component) {\n  inherits(MouseTimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseTimeDisplay(player, options) {\n    classCallCheck(this, MouseTimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.update = throttle(bind(_this, _this.update), 25);\n    return _this;\n  }\n\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  MouseTimeDisplay.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  };\n\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n\n\n  MouseTimeDisplay.prototype.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    // If there is an existing rAF ID, cancel it so we don't over-queue.\n    if (this.rafId_) {\n      this.cancelAnimationFrame(this.rafId_);\n    }\n\n    this.rafId_ = this.requestAnimationFrame(function () {\n      var duration = _this2.player_.duration();\n      var content = formatTime(seekBarPoint * duration, duration);\n\n      _this2.el_.style.left = seekBarRect.width * seekBarPoint + 'px';\n      _this2.getChild('timeTooltip').update(seekBarRect, seekBarPoint, content);\n    });\n  };\n\n  return MouseTimeDisplay;\n}(Component);\n\n/**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseTimeDisplay.prototype.options_ = {\n  children: ['timeTooltip']\n};\n\nComponent.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\n\n/**\n * @file seek-bar.js\n */\n// The number of seconds the `step*` functions move the timeline.\nvar STEP_SECONDS = 5;\n\n// The interval at which the bar should update as it progresses.\nvar UPDATE_REFRESH_INTERVAL = 30;\n\n/**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n\nvar SeekBar = function (_Slider) {\n  inherits(SeekBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekBar(player, options) {\n    classCallCheck(this, SeekBar);\n\n    var _this = possibleConstructorReturn(this, _Slider.call(this, player, options));\n\n    _this.setEventHandlers_();\n    return _this;\n  }\n\n  /**\n   * Sets the event handlers\n   *\n   * @private\n   */\n\n\n  SeekBar.prototype.setEventHandlers_ = function setEventHandlers_() {\n    var _this2 = this;\n\n    this.update = throttle(bind(this, this.update), UPDATE_REFRESH_INTERVAL);\n\n    this.on(this.player_, 'timeupdate', this.update);\n    this.on(this.player_, 'ended', this.handleEnded);\n\n    // when playing, let's ensure we smoothly update the play progress bar\n    // via an interval\n    this.updateInterval = null;\n\n    this.on(this.player_, ['playing'], function () {\n      _this2.clearInterval(_this2.updateInterval);\n\n      _this2.updateInterval = _this2.setInterval(function () {\n        _this2.requestAnimationFrame(function () {\n          _this2.update();\n        });\n      }, UPDATE_REFRESH_INTERVAL);\n    });\n\n    this.on(this.player_, ['ended', 'pause', 'waiting'], function () {\n      _this2.clearInterval(_this2.updateInterval);\n    });\n\n    this.on(this.player_, ['timeupdate', 'ended'], this.update);\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  SeekBar.prototype.createEl = function createEl$$1() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-holder'\n    }, {\n      'aria-label': this.localize('Progress Bar')\n    });\n  };\n\n  /**\n   * This function updates the play progress bar and accessiblity\n   * attributes to whatever is passed in.\n   *\n   * @param {number} currentTime\n   *        The currentTime value that should be used for accessiblity\n   *\n   * @param {number} percent\n   *        The percentage as a decimal that the bar should be filled from 0-1.\n   *\n   * @private\n   */\n\n\n  SeekBar.prototype.update_ = function update_(currentTime, percent) {\n    var duration = this.player_.duration();\n\n    // machine readable value of progress bar (percentage complete)\n    this.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));\n\n    // human readable value of progress bar (time complete)\n    this.el_.setAttribute('aria-valuetext', this.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));\n\n    // Update the `PlayProgressBar`.\n    this.bar.update(getBoundingClientRect(this.el_), percent);\n  };\n\n  /**\n   * Update the seek bar's UI.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   *\n   * @returns {number}\n   *          The current percent at a number from 0-1\n   */\n\n\n  SeekBar.prototype.update = function update(event) {\n    var percent = _Slider.prototype.update.call(this);\n\n    this.update_(this.getCurrentTime_(), percent);\n    return percent;\n  };\n\n  /**\n   * Get the value of current time but allows for smooth scrubbing,\n   * when player can't keep up.\n   *\n   * @return {number}\n   *         The current time value to display\n   *\n   * @private\n   */\n\n\n  SeekBar.prototype.getCurrentTime_ = function getCurrentTime_() {\n    return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n  };\n\n  /**\n   * We want the seek bar to be full on ended\n   * no matter what the actual internal values are. so we force it.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  SeekBar.prototype.handleEnded = function handleEnded(event) {\n    this.update_(this.player_.duration(), 1);\n  };\n\n  /**\n   * Get the percentage of media played so far.\n   *\n   * @return {number}\n   *         The percentage of media played so far (0 to 1).\n   */\n\n\n  SeekBar.prototype.getPercent = function getPercent() {\n    var percent = this.getCurrentTime_() / this.player_.duration();\n\n    return percent >= 1 ? 1 : percent;\n  };\n\n  /**\n   * Handle mouse down on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n\n\n  SeekBar.prototype.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    // Stop event propagation to prevent double fire in progress-control.js\n    event.stopPropagation();\n    this.player_.scrubbing(true);\n\n    this.videoWasPlaying = !this.player_.paused();\n    this.player_.pause();\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  };\n\n  /**\n   * Handle mouse move on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this to run.\n   *\n   * @listens mousemove\n   */\n\n\n  SeekBar.prototype.handleMouseMove = function handleMouseMove(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    var newTime = this.calculateDistance(event) * this.player_.duration();\n\n    // Don't let video end while scrubbing.\n    if (newTime === this.player_.duration()) {\n      newTime = newTime - 0.1;\n    }\n\n    // Set new time (tell player to seek to new time)\n    this.player_.currentTime(newTime);\n  };\n\n  SeekBar.prototype.enable = function enable() {\n    _Slider.prototype.enable.call(this);\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.show();\n  };\n\n  SeekBar.prototype.disable = function disable() {\n    _Slider.prototype.disable.call(this);\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.hide();\n  };\n\n  /**\n   * Handle mouse up on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseup` event that caused this to run.\n   *\n   * @listens mouseup\n   */\n\n\n  SeekBar.prototype.handleMouseUp = function handleMouseUp(event) {\n    _Slider.prototype.handleMouseUp.call(this, event);\n\n    // Stop event propagation to prevent double fire in progress-control.js\n    if (event) {\n      event.stopPropagation();\n    }\n    this.player_.scrubbing(false);\n\n    /**\n     * Trigger timeupdate because we're done seeking and the time has changed.\n     * This is particularly useful for if the player is paused to time the time displays.\n     *\n     * @event Tech#timeupdate\n     * @type {EventTarget~Event}\n     */\n    this.player_.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n    if (this.videoWasPlaying) {\n      silencePromise(this.player_.play());\n    }\n  };\n\n  /**\n   * Move more quickly fast forward for keyboard-only users\n   */\n\n\n  SeekBar.prototype.stepForward = function stepForward() {\n    this.player_.currentTime(this.player_.currentTime() + STEP_SECONDS);\n  };\n\n  /**\n   * Move more quickly rewind for keyboard-only users\n   */\n\n\n  SeekBar.prototype.stepBack = function stepBack() {\n    this.player_.currentTime(this.player_.currentTime() - STEP_SECONDS);\n  };\n\n  /**\n   * Toggles the playback state of the player\n   * This gets called when enter or space is used on the seekbar\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called\n   *\n   */\n\n\n  SeekBar.prototype.handleAction = function handleAction(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  /**\n   * Called when this SeekBar has focus and a key gets pressed down. By\n   * default it will call `this.handleAction` when the key is space or enter.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n\n\n  SeekBar.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Support Space (32) or Enter (13) key operation to fire a click event\n    if (event.which === 32 || event.which === 13) {\n      event.preventDefault();\n      this.handleAction(event);\n    } else if (_Slider.prototype.handleKeyPress) {\n\n      // Pass keypress handling up for unsupported keys\n      _Slider.prototype.handleKeyPress.call(this, event);\n    }\n  };\n\n  return SeekBar;\n}(Slider);\n\n/**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n\n\nSeekBar.prototype.options_ = {\n  children: ['loadProgressBar', 'playProgressBar'],\n  barName: 'playProgressBar'\n};\n\n// MouseTimeDisplay tooltips should not be added to a player on mobile devices or IE8\nif ((!IE_VERSION || IE_VERSION > 8) && !IS_IOS && !IS_ANDROID) {\n  SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n}\n\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\nSeekBar.prototype.playerEvent = 'timeupdate';\n\nComponent.registerComponent('SeekBar', SeekBar);\n\n/**\n * @file progress-control.js\n */\n/**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n\nvar ProgressControl = function (_Component) {\n  inherits(ProgressControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ProgressControl(player, options) {\n    classCallCheck(this, ProgressControl);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.handleMouseMove = throttle(bind(_this, _this.handleMouseMove), 25);\n    _this.throttledHandleMouseSeek = throttle(bind(_this, _this.handleMouseSeek), 25);\n\n    _this.enable();\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  ProgressControl.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-control vjs-control'\n    });\n  };\n\n  /**\n   * When the mouse moves over the `ProgressControl`, the pointer position\n   * gets passed down to the `MouseTimeDisplay` component.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   */\n\n\n  ProgressControl.prototype.handleMouseMove = function handleMouseMove(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n      var seekBarEl = seekBar.el();\n      var seekBarRect = getBoundingClientRect(seekBarEl);\n      var seekBarPoint = getPointerPosition(seekBarEl, event).x;\n\n      // The default skin has a gap on either side of the `SeekBar`. This means\n      // that it's possible to trigger this behavior outside the boundaries of\n      // the `SeekBar`. This ensures we stay within it at all times.\n      if (seekBarPoint > 1) {\n        seekBarPoint = 1;\n      } else if (seekBarPoint < 0) {\n        seekBarPoint = 0;\n      }\n\n      if (mouseTimeDisplay) {\n        mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n      }\n    }\n  };\n\n  /**\n   * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n   *\n   * @method ProgressControl#throttledHandleMouseSeek\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   * @listen touchmove\n   */\n\n  /**\n   * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n\n\n  ProgressControl.prototype.handleMouseSeek = function handleMouseSeek(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseMove(event);\n    }\n  };\n\n  /**\n   * Are controls are currently enabled for this progress control.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  ProgressControl.prototype.enabled = function enabled() {\n    return this.enabled_;\n  };\n\n  /**\n   * Disable all controls on the progress control and its children\n   */\n\n\n  ProgressControl.prototype.disable = function disable() {\n    this.children().forEach(function (child) {\n      return child.disable && child.disable();\n    });\n\n    if (!this.enabled()) {\n      return;\n    }\n\n    this.off(['mousedown', 'touchstart'], this.handleMouseDown);\n    this.off(this.el_, 'mousemove', this.handleMouseMove);\n    this.handleMouseUp();\n\n    this.addClass('disabled');\n\n    this.enabled_ = false;\n  };\n\n  /**\n   * Enable all controls on the progress control and its children\n   */\n\n\n  ProgressControl.prototype.enable = function enable() {\n    this.children().forEach(function (child) {\n      return child.enable && child.enable();\n    });\n\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on(['mousedown', 'touchstart'], this.handleMouseDown);\n    this.on(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeClass('disabled');\n\n    this.enabled_ = true;\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n\n\n  ProgressControl.prototype.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseDown(event);\n    }\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchend', this.handleMouseUp);\n  };\n\n  /**\n   * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n\n\n  ProgressControl.prototype.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseUp(event);\n    }\n\n    this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchend', this.handleMouseUp);\n  };\n\n  return ProgressControl;\n}(Component);\n\n/**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n\n\nProgressControl.prototype.options_ = {\n  children: ['seekBar']\n};\n\nComponent.registerComponent('ProgressControl', ProgressControl);\n\n/**\n * @file fullscreen-toggle.js\n */\n/**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n\nvar FullscreenToggle = function (_Button) {\n  inherits(FullscreenToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function FullscreenToggle(player, options) {\n    classCallCheck(this, FullscreenToggle);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.on(player, 'fullscreenchange', _this.handleFullscreenChange);\n\n    if (document[FullscreenApi.fullscreenEnabled] === false) {\n      _this.disable();\n    }\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  FullscreenToggle.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-fullscreen-control ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Handles fullscreenchange on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#fullscreenchange} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#fullscreenchange\n   */\n\n\n  FullscreenToggle.prototype.handleFullscreenChange = function handleFullscreenChange(event) {\n    if (this.player_.isFullscreen()) {\n      this.controlText('Non-Fullscreen');\n    } else {\n      this.controlText('Fullscreen');\n    }\n  };\n\n  /**\n   * This gets called when an `FullscreenToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  FullscreenToggle.prototype.handleClick = function handleClick(event) {\n    if (!this.player_.isFullscreen()) {\n      this.player_.requestFullscreen();\n    } else {\n      this.player_.exitFullscreen();\n    }\n  };\n\n  return FullscreenToggle;\n}(Button);\n\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nFullscreenToggle.prototype.controlText_ = 'Fullscreen';\n\nComponent.registerComponent('FullscreenToggle', FullscreenToggle);\n\n/**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed  using the `vjs-hidden` class.\n *\n * @param {Component} self\n *        The component that should be hidden if volume is unsupported\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkVolumeSupport = function checkVolumeSupport(self, player) {\n  // hide volume controls when they're not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresVolumeControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresVolumeControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * @file volume-level.js\n */\n/**\n * Shows volume level\n *\n * @extends Component\n */\n\nvar VolumeLevel = function (_Component) {\n  inherits(VolumeLevel, _Component);\n\n  function VolumeLevel() {\n    classCallCheck(this, VolumeLevel);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  VolumeLevel.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-level',\n      innerHTML: '<span class=\"vjs-control-text\"></span>'\n    });\n  };\n\n  return VolumeLevel;\n}(Component);\n\nComponent.registerComponent('VolumeLevel', VolumeLevel);\n\n/**\n * @file volume-bar.js\n */\n// Required children\n/**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n\nvar VolumeBar = function (_Slider) {\n  inherits(VolumeBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeBar(player, options) {\n    classCallCheck(this, VolumeBar);\n\n    var _this = possibleConstructorReturn(this, _Slider.call(this, player, options));\n\n    _this.on('slideractive', _this.updateLastVolume_);\n    _this.on(player, 'volumechange', _this.updateARIAAttributes);\n    player.ready(function () {\n      return _this.updateARIAAttributes();\n    });\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  VolumeBar.prototype.createEl = function createEl$$1() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-bar vjs-slider-bar'\n    }, {\n      'aria-label': this.localize('Volume Level'),\n      'aria-live': 'polite'\n    });\n  };\n\n  /**\n   * Handle mouse down on volume bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n\n\n  VolumeBar.prototype.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  };\n\n  /**\n   * Handle movement events on the {@link VolumeMenuButton}.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @listens mousemove\n   */\n\n\n  VolumeBar.prototype.handleMouseMove = function handleMouseMove(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    this.checkMuted();\n    this.player_.volume(this.calculateDistance(event));\n  };\n\n  /**\n   * If the player is muted unmute it.\n   */\n\n\n  VolumeBar.prototype.checkMuted = function checkMuted() {\n    if (this.player_.muted()) {\n      this.player_.muted(false);\n    }\n  };\n\n  /**\n   * Get percent of volume level\n   *\n   * @return {number}\n   *         Volume level percent as a decimal number.\n   */\n\n\n  VolumeBar.prototype.getPercent = function getPercent() {\n    if (this.player_.muted()) {\n      return 0;\n    }\n    return this.player_.volume();\n  };\n\n  /**\n   * Increase volume level for keyboard users\n   */\n\n\n  VolumeBar.prototype.stepForward = function stepForward() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() + 0.1);\n  };\n\n  /**\n   * Decrease volume level for keyboard users\n   */\n\n\n  VolumeBar.prototype.stepBack = function stepBack() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() - 0.1);\n  };\n\n  /**\n   * Update ARIA accessibility attributes\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `volumechange` event that caused this function to run.\n   *\n   * @listens Player#volumechange\n   */\n\n\n  VolumeBar.prototype.updateARIAAttributes = function updateARIAAttributes(event) {\n    var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n\n    this.el_.setAttribute('aria-valuenow', ariaValue);\n    this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n  };\n\n  /**\n   * Returns the current value of the player volume as a percentage\n   *\n   * @private\n   */\n\n\n  VolumeBar.prototype.volumeAsPercentage_ = function volumeAsPercentage_() {\n    return Math.round(this.player_.volume() * 100);\n  };\n\n  /**\n   * When user starts dragging the VolumeBar, store the volume and listen for\n   * the end of the drag. When the drag ends, if the volume was set to zero,\n   * set lastVolume to the stored volume.\n   *\n   * @listens slideractive\n   * @private\n   */\n\n\n  VolumeBar.prototype.updateLastVolume_ = function updateLastVolume_() {\n    var _this2 = this;\n\n    var volumeBeforeDrag = this.player_.volume();\n\n    this.one('sliderinactive', function () {\n      if (_this2.player_.volume() === 0) {\n        _this2.player_.lastVolume_(volumeBeforeDrag);\n      }\n    });\n  };\n\n  return VolumeBar;\n}(Slider);\n\n/**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeBar.prototype.options_ = {\n  children: ['volumeLevel'],\n  barName: 'volumeLevel'\n};\n\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\nVolumeBar.prototype.playerEvent = 'volumechange';\n\nComponent.registerComponent('VolumeBar', VolumeBar);\n\n/**\n * @file volume-control.js\n */\n// Required children\n/**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n\nvar VolumeControl = function (_Component) {\n  inherits(VolumeControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumeControl(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, VolumeControl);\n\n    options.vertical = options.vertical || false;\n\n    // Pass the vertical option down to the VolumeBar if\n    // the VolumeBar is turned on.\n    if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n      options.volumeBar = options.volumeBar || {};\n      options.volumeBar.vertical = options.vertical;\n    }\n\n    // hide this control if volume support is missing\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    checkVolumeSupport(_this, player);\n\n    _this.throttledHandleMouseMove = throttle(bind(_this, _this.handleMouseMove), 25);\n\n    _this.on('mousedown', _this.handleMouseDown);\n    _this.on('touchstart', _this.handleMouseDown);\n\n    // while the slider is active (the mouse has been pressed down and\n    // is dragging) or in focus we do not want to hide the VolumeBar\n    _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {\n      _this.volumeBar.addClass('vjs-slider-active');\n      _this.addClass('vjs-slider-active');\n      _this.trigger('slideractive');\n    });\n\n    _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {\n      _this.volumeBar.removeClass('vjs-slider-active');\n      _this.removeClass('vjs-slider-active');\n      _this.trigger('sliderinactive');\n    });\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  VolumeControl.prototype.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-horizontal';\n\n    if (this.options_.vertical) {\n      orientationClass = 'vjs-volume-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-control vjs-control ' + orientationClass\n    });\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n\n\n  VolumeControl.prototype.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchend', this.handleMouseUp);\n  };\n\n  /**\n   * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n\n\n  VolumeControl.prototype.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n\n    this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchend', this.handleMouseUp);\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n\n\n  VolumeControl.prototype.handleMouseMove = function handleMouseMove(event) {\n    this.volumeBar.handleMouseMove(event);\n  };\n\n  return VolumeControl;\n}(Component);\n\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeControl.prototype.options_ = {\n  children: ['volumeBar']\n};\n\nComponent.registerComponent('VolumeControl', VolumeControl);\n\n/**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param {Component} self\n *        A reference to the mute toggle button\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkMuteSupport = function checkMuteSupport(self, player) {\n  // hide mute toggle button if it's not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresMuteControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresMuteControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * @file mute-toggle.js\n */\n/**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n\nvar MuteToggle = function (_Button) {\n  inherits(MuteToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MuteToggle(player, options) {\n    classCallCheck(this, MuteToggle);\n\n    // hide this control if volume support is missing\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    checkMuteSupport(_this, player);\n\n    _this.on(player, ['loadstart', 'volumechange'], _this.update);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  MuteToggle.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-mute-control ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * This gets called when an `MuteToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  MuteToggle.prototype.handleClick = function handleClick(event) {\n    var vol = this.player_.volume();\n    var lastVolume = this.player_.lastVolume_();\n\n    if (vol === 0) {\n      var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n\n      this.player_.volume(volumeToSet);\n      this.player_.muted(false);\n    } else {\n      this.player_.muted(this.player_.muted() ? false : true);\n    }\n  };\n\n  /**\n   * Update the `MuteToggle` button based on the state of `volume` and `muted`\n   * on the player.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#loadstart} event if this function was called\n   *        through an event.\n   *\n   * @listens Player#loadstart\n   * @listens Player#volumechange\n   */\n\n\n  MuteToggle.prototype.update = function update(event) {\n    this.updateIcon_();\n    this.updateControlText_();\n  };\n\n  /**\n   * Update the appearance of the `MuteToggle` icon.\n   *\n   * Possible states (given `level` variable below):\n   * - 0: crossed out\n   * - 1: zero bars of volume\n   * - 2: one bar of volume\n   * - 3: two bars of volume\n   *\n   * @private\n   */\n\n\n  MuteToggle.prototype.updateIcon_ = function updateIcon_() {\n    var vol = this.player_.volume();\n    var level = 3;\n\n    // in iOS when a player is loaded with muted attribute\n    // and volume is changed with a native mute button\n    // we want to make sure muted state is updated\n    if (IS_IOS) {\n      this.player_.muted(this.player_.tech_.el_.muted);\n    }\n\n    if (vol === 0 || this.player_.muted()) {\n      level = 0;\n    } else if (vol < 0.33) {\n      level = 1;\n    } else if (vol < 0.67) {\n      level = 2;\n    }\n\n    // TODO improve muted icon classes\n    for (var i = 0; i < 4; i++) {\n      removeClass(this.el_, 'vjs-vol-' + i);\n    }\n    addClass(this.el_, 'vjs-vol-' + level);\n  };\n\n  /**\n   * If `muted` has changed on the player, update the control text\n   * (`title` attribute on `vjs-mute-control` element and content of\n   * `vjs-control-text` element).\n   *\n   * @private\n   */\n\n\n  MuteToggle.prototype.updateControlText_ = function updateControlText_() {\n    var soundOff = this.player_.muted() || this.player_.volume() === 0;\n    var text = soundOff ? 'Unmute' : 'Mute';\n\n    if (this.controlText() !== text) {\n      this.controlText(text);\n    }\n  };\n\n  return MuteToggle;\n}(Button);\n\n/**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nMuteToggle.prototype.controlText_ = 'Mute';\n\nComponent.registerComponent('MuteToggle', MuteToggle);\n\n/**\n * @file volume-control.js\n */\n// Required children\n/**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n\nvar VolumePanel = function (_Component) {\n  inherits(VolumePanel, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumePanel(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, VolumePanel);\n\n    if (typeof options.inline !== 'undefined') {\n      options.inline = options.inline;\n    } else {\n      options.inline = true;\n    }\n\n    // pass the inline option down to the VolumeControl as vertical if\n    // the VolumeControl is on.\n    if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n      options.volumeControl = options.volumeControl || {};\n      options.volumeControl.vertical = !options.inline;\n    }\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.on(player, ['loadstart'], _this.volumePanelState_);\n\n    // while the slider is active (the mouse has been pressed down and\n    // is dragging) we do not want to hide the VolumeBar\n    _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);\n\n    _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);\n    return _this;\n  }\n\n  /**\n   * Add vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#slideractive\n   * @private\n   */\n\n\n  VolumePanel.prototype.sliderActive_ = function sliderActive_() {\n    this.addClass('vjs-slider-active');\n  };\n\n  /**\n   * Removes vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#sliderinactive\n   * @private\n   */\n\n\n  VolumePanel.prototype.sliderInactive_ = function sliderInactive_() {\n    this.removeClass('vjs-slider-active');\n  };\n\n  /**\n   * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n   * depending on MuteToggle and VolumeControl state\n   *\n   * @listens Player#loadstart\n   * @private\n   */\n\n\n  VolumePanel.prototype.volumePanelState_ = function volumePanelState_() {\n    // hide volume panel if neither volume control or mute toggle\n    // are displayed\n    if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-hidden');\n    }\n\n    // if only mute toggle is visible we don't want\n    // volume panel expanding when hovered or active\n    if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-mute-toggle-only');\n    }\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  VolumePanel.prototype.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-panel-horizontal';\n\n    if (!this.options_.inline) {\n      orientationClass = 'vjs-volume-panel-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-panel vjs-control ' + orientationClass\n    });\n  };\n\n  return VolumePanel;\n}(Component);\n\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumePanel.prototype.options_ = {\n  children: ['muteToggle', 'volumeControl']\n};\n\nComponent.registerComponent('VolumePanel', VolumePanel);\n\n/**\n * @file menu.js\n */\n/**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n\nvar Menu = function (_Component) {\n  inherits(Menu, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        the player that this component should attach to\n   *\n   * @param {Object} [options]\n   *        Object of option names and values\n   *\n   */\n  function Menu(player, options) {\n    classCallCheck(this, Menu);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    if (options) {\n      _this.menuButton_ = options.menuButton;\n    }\n\n    _this.focusedChild_ = -1;\n\n    _this.on('keydown', _this.handleKeyPress);\n    return _this;\n  }\n\n  /**\n   * Add a {@link MenuItem} to the menu.\n   *\n   * @param {Object|string} component\n   *        The name or instance of the `MenuItem` to add.\n   *\n   */\n\n\n  Menu.prototype.addItem = function addItem(component) {\n    this.addChild(component);\n    component.on('click', bind(this, function (event) {\n      // Unpress the associated MenuButton, and move focus back to it\n      if (this.menuButton_) {\n        this.menuButton_.unpressButton();\n\n        // don't focus menu button if item is a caption settings item\n        // because focus will move elsewhere and it logs an error on IE8\n        if (component.name() !== 'CaptionSettingsMenuItem') {\n          this.menuButton_.focus();\n        }\n      }\n    }));\n  };\n\n  /**\n   * Create the `Menu`s DOM element.\n   *\n   * @return {Element}\n   *         the element that was created\n   */\n\n\n  Menu.prototype.createEl = function createEl$$1() {\n    var contentElType = this.options_.contentElType || 'ul';\n\n    this.contentEl_ = createEl(contentElType, {\n      className: 'vjs-menu-content'\n    });\n\n    this.contentEl_.setAttribute('role', 'menu');\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      append: this.contentEl_,\n      className: 'vjs-menu'\n    });\n\n    el.appendChild(this.contentEl_);\n\n    // Prevent clicks from bubbling up. Needed for Menu Buttons,\n    // where a click on the parent is significant\n    on(el, 'click', function (event) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    });\n\n    return el;\n  };\n\n  Menu.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Handle a `keydown` event on this menu. This listener is added in the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        A `keydown` event that happened on the menu.\n   *\n   * @listens keydown\n   */\n\n\n  Menu.prototype.handleKeyPress = function handleKeyPress(event) {\n    // Left and Down Arrows\n    if (event.which === 37 || event.which === 40) {\n      event.preventDefault();\n      this.stepForward();\n\n      // Up and Right Arrows\n    } else if (event.which === 38 || event.which === 39) {\n      event.preventDefault();\n      this.stepBack();\n    }\n  };\n\n  /**\n   * Move to next (lower) menu item for keyboard users.\n   */\n\n\n  Menu.prototype.stepForward = function stepForward() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ + 1;\n    }\n    this.focus(stepChild);\n  };\n\n  /**\n   * Move to previous (higher) menu item for keyboard users.\n   */\n\n\n  Menu.prototype.stepBack = function stepBack() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ - 1;\n    }\n    this.focus(stepChild);\n  };\n\n  /**\n   * Set focus on a {@link MenuItem} in the `Menu`.\n   *\n   * @param {Object|string} [item=0]\n   *        Index of child item set focus on.\n   */\n\n\n  Menu.prototype.focus = function focus() {\n    var item = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;\n\n    var children = this.children().slice();\n    var haveTitle = children.length && children[0].className && /vjs-menu-title/.test(children[0].className);\n\n    if (haveTitle) {\n      children.shift();\n    }\n\n    if (children.length > 0) {\n      if (item < 0) {\n        item = 0;\n      } else if (item >= children.length) {\n        item = children.length - 1;\n      }\n\n      this.focusedChild_ = item;\n\n      children[item].el_.focus();\n    }\n  };\n\n  return Menu;\n}(Component);\n\nComponent.registerComponent('Menu', Menu);\n\n/**\n * @file menu-button.js\n */\n/**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n\nvar MenuButton = function (_Component) {\n  inherits(MenuButton, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function MenuButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, MenuButton);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.menuButton_ = new Button(player, options);\n\n    _this.menuButton_.controlText(_this.controlText_);\n    _this.menuButton_.el_.setAttribute('aria-haspopup', 'true');\n\n    // Add buildCSSClass values to the button, not the wrapper\n    var buttonClass = Button.prototype.buildCSSClass();\n\n    _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;\n    _this.menuButton_.removeClass('vjs-control');\n\n    _this.addChild(_this.menuButton_);\n\n    _this.update();\n\n    _this.enabled_ = true;\n\n    _this.on(_this.menuButton_, 'tap', _this.handleClick);\n    _this.on(_this.menuButton_, 'click', _this.handleClick);\n    _this.on(_this.menuButton_, 'focus', _this.handleFocus);\n    _this.on(_this.menuButton_, 'blur', _this.handleBlur);\n\n    _this.on('keydown', _this.handleSubmenuKeyPress);\n    return _this;\n  }\n\n  /**\n   * Update the menu based on the current state of its items.\n   */\n\n\n  MenuButton.prototype.update = function update() {\n    var menu = this.createMenu();\n\n    if (this.menu) {\n      this.menu.dispose();\n      this.removeChild(this.menu);\n    }\n\n    this.menu = menu;\n    this.addChild(menu);\n\n    /**\n     * Track the state of the menu button\n     *\n     * @type {Boolean}\n     * @private\n     */\n    this.buttonPressed_ = false;\n    this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n\n    if (this.items && this.items.length <= this.hideThreshold_) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  };\n\n  /**\n   * Create the menu and add all items to it.\n   *\n   * @return {Menu}\n   *         The constructed menu\n   */\n\n\n  MenuButton.prototype.createMenu = function createMenu() {\n    var menu = new Menu(this.player_, { menuButton: this });\n\n    /**\n     * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n     * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n     * it here because every time we run `createMenu` we need to reset the value.\n     *\n     * @protected\n     * @type {Number}\n     */\n    this.hideThreshold_ = 0;\n\n    // Add a title list item to the top\n    if (this.options_.title) {\n      var title = createEl('li', {\n        className: 'vjs-menu-title',\n        innerHTML: toTitleCase(this.options_.title),\n        tabIndex: -1\n      });\n\n      this.hideThreshold_ += 1;\n\n      menu.children_.unshift(title);\n      prependTo(title, menu.contentEl());\n    }\n\n    this.items = this.createItems();\n\n    if (this.items) {\n      // Add menu items to the menu\n      for (var i = 0; i < this.items.length; i++) {\n        menu.addItem(this.items[i]);\n      }\n    }\n\n    return menu;\n  };\n\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   * @abstract\n   */\n\n\n  MenuButton.prototype.createItems = function createItems() {};\n\n  /**\n   * Create the `MenuButtons`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  MenuButton.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildWrapperCSSClass()\n    }, {});\n  };\n\n  /**\n   * Allow sub components to stack CSS class names for the wrapper element\n   *\n   * @return {string}\n   *         The constructed wrapper DOM `className`\n   */\n\n\n  MenuButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    var menuButtonClass = 'vjs-menu-button';\n\n    // If the inline option is passed, we want to use different styles altogether.\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    // TODO: Fix the CSS so that this isn't necessary\n    var buttonClass = Button.prototype.buildCSSClass();\n\n    return 'vjs-menu-button ' + menuButtonClass + ' ' + buttonClass + ' ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  MenuButton.prototype.buildCSSClass = function buildCSSClass() {\n    var menuButtonClass = 'vjs-menu-button';\n\n    // If the inline option is passed, we want to use different styles altogether.\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    return 'vjs-menu-button ' + menuButtonClass + ' ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Get or set the localized control text that will be used for accessibility.\n   *\n   * > NOTE: This will come from the internal `menuButton_` element.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.menuButton_.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n\n\n  MenuButton.prototype.controlText = function controlText(text) {\n    var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.menuButton_.el();\n\n    return this.menuButton_.controlText(text, el);\n  };\n\n  /**\n   * Handle a click on a `MenuButton`.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  MenuButton.prototype.handleClick = function handleClick(event) {\n    // When you click the button it adds focus, which will show the menu.\n    // So we'll remove focus when the mouse leaves the button. Focus is needed\n    // for tab navigation.\n\n    this.one(this.menu.contentEl(), 'mouseleave', bind(this, function (e) {\n      this.unpressButton();\n      this.el_.blur();\n    }));\n    if (this.buttonPressed_) {\n      this.unpressButton();\n    } else {\n      this.pressButton();\n    }\n  };\n\n  /**\n   * Set the focus to the actual button, not to this element\n   */\n\n\n  MenuButton.prototype.focus = function focus() {\n    this.menuButton_.focus();\n  };\n\n  /**\n   * Remove the focus from the actual button, not this element\n   */\n\n\n  MenuButton.prototype.blur = function blur() {\n    this.menuButton_.blur();\n  };\n\n  /**\n   * This gets called when a `MenuButton` gains focus via a `focus` event.\n   * Turns on listening for `keydown` events. When they happen it\n   * calls `this.handleKeyPress`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `focus` event that caused this function to be called.\n   *\n   * @listens focus\n   */\n\n\n  MenuButton.prototype.handleFocus = function handleFocus() {\n    on(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  /**\n   * Called when a `MenuButton` loses focus. Turns off the listener for\n   * `keydown` events. Which Stops `this.handleKeyPress` from getting called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n\n\n  MenuButton.prototype.handleBlur = function handleBlur() {\n    off(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  /**\n   * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n   * {@link ClickableComponent#handleKeyPress} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n\n\n  MenuButton.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Escape (27) key or Tab (9) key unpress the 'button'\n    if (event.which === 27 || event.which === 9) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      }\n      // Don't preventDefault for Tab key - we still want to lose focus\n      if (event.which !== 9) {\n        event.preventDefault();\n        // Set focus back to the menu button's button\n        this.menuButton_.el_.focus();\n      }\n      // Up (38) key or Down (40) key press the 'button'\n    } else if (event.which === 38 || event.which === 40) {\n      if (!this.buttonPressed_) {\n        this.pressButton();\n        event.preventDefault();\n      }\n    }\n  };\n\n  /**\n   * Handle a `keydown` event on a sub-menu. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keydown\n   */\n\n\n  MenuButton.prototype.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {\n\n    // Escape (27) key or Tab (9) key unpress the 'button'\n    if (event.which === 27 || event.which === 9) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      }\n      // Don't preventDefault for Tab key - we still want to lose focus\n      if (event.which !== 9) {\n        event.preventDefault();\n        // Set focus back to the menu button's button\n        this.menuButton_.el_.focus();\n      }\n    }\n  };\n\n  /**\n   * Put the current `MenuButton` into a pressed state.\n   */\n\n\n  MenuButton.prototype.pressButton = function pressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = true;\n      this.menu.lockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'true');\n\n      // set the focus into the submenu, except on iOS where it is resulting in\n      // undesired scrolling behavior when the player is in an iframe\n      if (IS_IOS && isInFrame()) {\n        // Return early so that the menu isn't focused\n        return;\n      }\n\n      this.menu.focus();\n    }\n  };\n\n  /**\n   * Take the current `MenuButton` out of a pressed state.\n   */\n\n\n  MenuButton.prototype.unpressButton = function unpressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = false;\n      this.menu.unlockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n    }\n  };\n\n  /**\n   * Disable the `MenuButton`. Don't allow it to be clicked.\n   */\n\n\n  MenuButton.prototype.disable = function disable() {\n    this.unpressButton();\n\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n\n    this.menuButton_.disable();\n  };\n\n  /**\n   * Enable the `MenuButton`. Allow it to be clicked.\n   */\n\n\n  MenuButton.prototype.enable = function enable() {\n    this.enabled_ = true;\n    this.removeClass('vjs-disabled');\n\n    this.menuButton_.enable();\n  };\n\n  return MenuButton;\n}(Component);\n\nComponent.registerComponent('MenuButton', MenuButton);\n\n/**\n * @file track-button.js\n */\n/**\n * The base class for buttons that toggle specific  track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n\nvar TrackButton = function (_MenuButton) {\n  inherits(TrackButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TrackButton(player, options) {\n    classCallCheck(this, TrackButton);\n\n    var tracks = options.tracks;\n\n    var _this = possibleConstructorReturn(this, _MenuButton.call(this, player, options));\n\n    if (_this.items.length <= 1) {\n      _this.hide();\n    }\n\n    if (!tracks) {\n      return possibleConstructorReturn(_this);\n    }\n\n    var updateHandler = bind(_this, _this.update);\n\n    tracks.addEventListener('removetrack', updateHandler);\n    tracks.addEventListener('addtrack', updateHandler);\n    _this.player_.on('ready', updateHandler);\n\n    _this.player_.on('dispose', function () {\n      tracks.removeEventListener('removetrack', updateHandler);\n      tracks.removeEventListener('addtrack', updateHandler);\n    });\n    return _this;\n  }\n\n  return TrackButton;\n}(MenuButton);\n\nComponent.registerComponent('TrackButton', TrackButton);\n\n/**\n * @file menu-item.js\n */\n/**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n\nvar MenuItem = function (_ClickableComponent) {\n  inherits(MenuItem, _ClickableComponent);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   *\n   */\n  function MenuItem(player, options) {\n    classCallCheck(this, MenuItem);\n\n    var _this = possibleConstructorReturn(this, _ClickableComponent.call(this, player, options));\n\n    _this.selectable = options.selectable;\n    _this.isSelected_ = options.selected || false;\n    _this.multiSelectable = options.multiSelectable;\n\n    _this.selected(_this.isSelected_);\n\n    if (_this.selectable) {\n      if (_this.multiSelectable) {\n        _this.el_.setAttribute('role', 'menuitemcheckbox');\n      } else {\n        _this.el_.setAttribute('role', 'menuitemradio');\n      }\n    } else {\n      _this.el_.setAttribute('role', 'menuitem');\n    }\n    return _this;\n  }\n\n  /**\n   * Create the `MenuItem's DOM element\n   *\n   * @param {string} [type=li]\n   *        Element's node type, not actually used, always set to `li`.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element\n   *\n   * @param {Object} [attrs={}]\n   *        An object of attributes that should be set on the element\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  MenuItem.prototype.createEl = function createEl(type, props, attrs) {\n    // The control is textual, not just an icon\n    this.nonIconControl = true;\n\n    return _ClickableComponent.prototype.createEl.call(this, 'li', assign({\n      className: 'vjs-menu-item',\n      innerHTML: '<span class=\"vjs-menu-item-text\">' + this.localize(this.options_.label) + '</span>',\n      tabIndex: -1\n    }, props), attrs);\n  };\n\n  /**\n   * Any click on a `MenuItem` puts it into the selected state.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  MenuItem.prototype.handleClick = function handleClick(event) {\n    this.selected(true);\n  };\n\n  /**\n   * Set the state for this menu item as selected or not.\n   *\n   * @param {boolean} selected\n   *        if the menu item is selected or not\n   */\n\n\n  MenuItem.prototype.selected = function selected(_selected) {\n    if (this.selectable) {\n      if (_selected) {\n        this.addClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'true');\n        // aria-checked isn't fully supported by browsers/screen readers,\n        // so indicate selected state to screen reader in the control text.\n        this.controlText(', selected');\n        this.isSelected_ = true;\n      } else {\n        this.removeClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'false');\n        // Indicate un-selected state to screen reader\n        this.controlText('');\n        this.isSelected_ = false;\n      }\n    }\n  };\n\n  return MenuItem;\n}(ClickableComponent);\n\nComponent.registerComponent('MenuItem', MenuItem);\n\n/**\n * @file text-track-menu-item.js\n */\n/**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n\nvar TextTrackMenuItem = function (_MenuItem) {\n  inherits(TextTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TextTrackMenuItem(player, options) {\n    classCallCheck(this, TextTrackMenuItem);\n\n    var track = options.track;\n    var tracks = player.textTracks();\n\n    // Modify options for parent MenuItem class's init.\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.mode === 'showing';\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.track = track;\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_this, args);\n    };\n    var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {\n      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      _this.handleSelectedLanguageChange.apply(_this, args);\n    };\n\n    player.on(['loadstart', 'texttrackchange'], changeHandler);\n    tracks.addEventListener('change', changeHandler);\n    tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    _this.on('dispose', function () {\n      player.off(['loadstart', 'texttrackchange'], changeHandler);\n      tracks.removeEventListener('change', changeHandler);\n      tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    });\n\n    // iOS7 doesn't dispatch change events to TextTrackLists when an\n    // associated track's mode changes. Without something like\n    // Object.observe() (also not present on iOS7), it's not\n    // possible to detect changes to the mode attribute and polyfill\n    // the change event. As a poor substitute, we manually dispatch\n    // change events whenever the controls modify the mode.\n    if (tracks.onchange === undefined) {\n      var event = void 0;\n\n      _this.on(['tap', 'click'], function () {\n        if (_typeof(window.Event) !== 'object') {\n          // Android 2.3 throws an Illegal Constructor error for window.Event\n          try {\n            event = new window.Event('change');\n          } catch (err) {\n            // continue regardless of error\n          }\n        }\n\n        if (!event) {\n          event = document.createEvent('Event');\n          event.initEvent('change', true, true);\n        }\n\n        tracks.dispatchEvent(event);\n      });\n    }\n\n    // set the default state based on current tracks\n    _this.handleTracksChange();\n    return _this;\n  }\n\n  /**\n   * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  TextTrackMenuItem.prototype.handleClick = function handleClick(event) {\n    var kind = this.track.kind;\n    var kinds = this.track.kinds;\n    var tracks = this.player_.textTracks();\n\n    if (!kinds) {\n      kinds = [kind];\n    }\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    if (!tracks) {\n      return;\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      if (track === this.track && kinds.indexOf(track.kind) > -1) {\n        if (track.mode !== 'showing') {\n          track.mode = 'showing';\n        }\n      } else if (track.mode !== 'disabled') {\n        track.mode = 'disabled';\n      }\n    }\n  };\n\n  /**\n   * Handle text track list change\n   *\n   * @param {EventTarget~Event} event\n   *        The `change` event that caused this function to be called.\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  TextTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {\n    var shouldBeSelected = this.track.mode === 'showing';\n\n    // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  TextTrackMenuItem.prototype.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    if (this.track.mode === 'showing') {\n      var selectedLanguage = this.player_.cache_.selectedLanguage;\n\n      // Don't replace the kind of track across the same language\n      if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n        return;\n      }\n\n      this.player_.cache_.selectedLanguage = {\n        enabled: true,\n        language: this.track.language,\n        kind: this.track.kind\n      };\n    }\n  };\n\n  TextTrackMenuItem.prototype.dispose = function dispose() {\n    // remove reference to track object on dispose\n    this.track = null;\n\n    _MenuItem.prototype.dispose.call(this);\n  };\n\n  return TextTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n\n/**\n * @file off-text-track-menu-item.js\n */\n/**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n\nvar OffTextTrackMenuItem = function (_TextTrackMenuItem) {\n  inherits(OffTextTrackMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function OffTextTrackMenuItem(player, options) {\n    classCallCheck(this, OffTextTrackMenuItem);\n\n    // Create pseudo track info\n    // Requires options['kind']\n    options.track = {\n      player: player,\n      kind: options.kind,\n      kinds: options.kinds,\n      'default': false,\n      mode: 'disabled'\n    };\n\n    if (!options.kinds) {\n      options.kinds = [options.kind];\n    }\n\n    if (options.label) {\n      options.track.label = options.label;\n    } else {\n      options.track.label = options.kinds.join(' and ') + ' off';\n    }\n\n    // MenuItem is selectable\n    options.selectable = true;\n    // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n    options.multiSelectable = false;\n\n    return possibleConstructorReturn(this, _TextTrackMenuItem.call(this, player, options));\n  }\n\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   */\n\n\n  OffTextTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var shouldBeSelected = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n        shouldBeSelected = false;\n        break;\n      }\n    }\n\n    // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  OffTextTrackMenuItem.prototype.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    var tracks = this.player().textTracks();\n    var allHidden = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n        allHidden = false;\n        break;\n      }\n    }\n\n    if (allHidden) {\n      this.player_.cache_.selectedLanguage = {\n        enabled: false\n      };\n    }\n  };\n\n  return OffTextTrackMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n\n/**\n * @file text-track-button.js\n */\n/**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n\nvar TextTrackButton = function (_TrackButton) {\n  inherits(TextTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function TextTrackButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, TextTrackButton);\n\n    options.tracks = player.textTracks();\n\n    return possibleConstructorReturn(this, _TrackButton.call(this, player, options));\n  }\n\n  /**\n   * Create a menu item for each text track\n   *\n   * @param {TextTrackMenuItem[]} [items=[]]\n   *        Existing array of items to use during creation\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items that were created\n   */\n\n\n  TextTrackButton.prototype.createItems = function createItems() {\n    var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    var TrackMenuItem = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : TextTrackMenuItem;\n\n\n    // Label is an overide for the [track] off label\n    // USed to localise captions/subtitles\n    var label = void 0;\n\n    if (this.label_) {\n      label = this.label_ + ' off';\n    }\n    // Add an OFF menu item to turn all tracks off\n    items.push(new OffTextTrackMenuItem(this.player_, {\n      kinds: this.kinds_,\n      kind: this.kind_,\n      label: label\n    }));\n\n    this.hideThreshold_ += 1;\n\n    var tracks = this.player_.textTracks();\n\n    if (!Array.isArray(this.kinds_)) {\n      this.kinds_ = [this.kind_];\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      // only add tracks that are of an appropriate kind and have a label\n      if (this.kinds_.indexOf(track.kind) > -1) {\n\n        var item = new TrackMenuItem(this.player_, {\n          track: track,\n          // MenuItem is selectable\n          selectable: true,\n          // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n          multiSelectable: false\n        });\n\n        item.addClass('vjs-' + track.kind + '-menu-item');\n        items.push(item);\n      }\n    }\n\n    return items;\n  };\n\n  return TextTrackButton;\n}(TrackButton);\n\nComponent.registerComponent('TextTrackButton', TextTrackButton);\n\n/**\n * @file chapters-track-menu-item.js\n */\n/**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n\nvar ChaptersTrackMenuItem = function (_MenuItem) {\n  inherits(ChaptersTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ChaptersTrackMenuItem(player, options) {\n    classCallCheck(this, ChaptersTrackMenuItem);\n\n    var track = options.track;\n    var cue = options.cue;\n    var currentTime = player.currentTime();\n\n    // Modify options for parent MenuItem class's init.\n    options.selectable = true;\n    options.multiSelectable = false;\n    options.label = cue.text;\n    options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.track = track;\n    _this.cue = cue;\n    track.addEventListener('cuechange', bind(_this, _this.update));\n    return _this;\n  }\n\n  /**\n   * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  ChaptersTrackMenuItem.prototype.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n    this.player_.currentTime(this.cue.startTime);\n    this.update(this.cue.startTime);\n  };\n\n  /**\n   * Update chapter menu item\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `cuechange` event that caused this function to run.\n   *\n   * @listens TextTrack#cuechange\n   */\n\n\n  ChaptersTrackMenuItem.prototype.update = function update(event) {\n    var cue = this.cue;\n    var currentTime = this.player_.currentTime();\n\n    // vjs.log(currentTime, cue.startTime);\n    this.selected(cue.startTime <= currentTime && currentTime < cue.endTime);\n  };\n\n  return ChaptersTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n\n/**\n * @file chapters-button.js\n */\n/**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n\nvar ChaptersButton = function (_TextTrackButton) {\n  inherits(ChaptersButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this function is ready.\n   */\n  function ChaptersButton(player, options, ready) {\n    classCallCheck(this, ChaptersButton);\n    return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  ChaptersButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-chapters-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  ChaptersButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-chapters-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Update the menu based on the current state of its items.\n   *\n   * @param {EventTarget~Event} [event]\n   *        An event that triggered this function to run.\n   *\n   * @listens TextTrackList#addtrack\n   * @listens TextTrackList#removetrack\n   * @listens TextTrackList#change\n   */\n\n\n  ChaptersButton.prototype.update = function update(event) {\n    if (!this.track_ || event && (event.type === 'addtrack' || event.type === 'removetrack')) {\n      this.setTrack(this.findChaptersTrack());\n    }\n    _TextTrackButton.prototype.update.call(this);\n  };\n\n  /**\n   * Set the currently selected track for the chapters button.\n   *\n   * @param {TextTrack} track\n   *        The new track to select. Nothing will change if this is the currently selected\n   *        track.\n   */\n\n\n  ChaptersButton.prototype.setTrack = function setTrack(track) {\n    if (this.track_ === track) {\n      return;\n    }\n\n    if (!this.updateHandler_) {\n      this.updateHandler_ = this.update.bind(this);\n    }\n\n    // here this.track_ refers to the old track instance\n    if (this.track_) {\n      var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (remoteTextTrackEl) {\n        remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n      }\n\n      this.track_ = null;\n    }\n\n    this.track_ = track;\n\n    // here this.track_ refers to the new track instance\n    if (this.track_) {\n      this.track_.mode = 'hidden';\n\n      var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (_remoteTextTrackEl) {\n        _remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n      }\n    }\n  };\n\n  /**\n   * Find the track object that is currently in use by this ChaptersButton\n   *\n   * @return {TextTrack|undefined}\n   *         The current track or undefined if none was found.\n   */\n\n\n  ChaptersButton.prototype.findChaptersTrack = function findChaptersTrack() {\n    var tracks = this.player_.textTracks() || [];\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      // We will always choose the last track as our chaptersTrack\n      var track = tracks[i];\n\n      if (track.kind === this.kind_) {\n        return track;\n      }\n    }\n  };\n\n  /**\n   * Get the caption for the ChaptersButton based on the track label. This will also\n   * use the current tracks localized kind as a fallback if a label does not exist.\n   *\n   * @return {string}\n   *         The tracks current label or the localized track kind.\n   */\n\n\n  ChaptersButton.prototype.getMenuCaption = function getMenuCaption() {\n    if (this.track_ && this.track_.label) {\n      return this.track_.label;\n    }\n    return this.localize(toTitleCase(this.kind_));\n  };\n\n  /**\n   * Create menu from chapter track\n   *\n   * @return {Menu}\n   *         New menu for the chapter buttons\n   */\n\n\n  ChaptersButton.prototype.createMenu = function createMenu() {\n    this.options_.title = this.getMenuCaption();\n    return _TextTrackButton.prototype.createMenu.call(this);\n  };\n\n  /**\n   * Create a menu item for each text track\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items\n   */\n\n\n  ChaptersButton.prototype.createItems = function createItems() {\n    var items = [];\n\n    if (!this.track_) {\n      return items;\n    }\n\n    var cues = this.track_.cues;\n\n    if (!cues) {\n      return items;\n    }\n\n    for (var i = 0, l = cues.length; i < l; i++) {\n      var cue = cues[i];\n      var mi = new ChaptersTrackMenuItem(this.player_, { track: this.track_, cue: cue });\n\n      items.push(mi);\n    }\n\n    return items;\n  };\n\n  return ChaptersButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nChaptersButton.prototype.kind_ = 'chapters';\n\n/**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nChaptersButton.prototype.controlText_ = 'Chapters';\n\nComponent.registerComponent('ChaptersButton', ChaptersButton);\n\n/**\n * @file descriptions-button.js\n */\n/**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n\nvar DescriptionsButton = function (_TextTrackButton) {\n  inherits(DescriptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function DescriptionsButton(player, options, ready) {\n    classCallCheck(this, DescriptionsButton);\n\n    var _this = possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n\n    var tracks = player.textTracks();\n    var changeHandler = bind(_this, _this.handleTracksChange);\n\n    tracks.addEventListener('change', changeHandler);\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n    return _this;\n  }\n\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  DescriptionsButton.prototype.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var disabled = false;\n\n    // Check whether a track of a different kind is showing\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (track.kind !== this.kind_ && track.mode === 'showing') {\n        disabled = true;\n        break;\n      }\n    }\n\n    // If another track is showing, disable this menu button\n    if (disabled) {\n      this.disable();\n    } else {\n      this.enable();\n    }\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  DescriptionsButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  DescriptionsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return DescriptionsButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nDescriptionsButton.prototype.kind_ = 'descriptions';\n\n/**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nDescriptionsButton.prototype.controlText_ = 'Descriptions';\n\nComponent.registerComponent('DescriptionsButton', DescriptionsButton);\n\n/**\n * @file subtitles-button.js\n */\n/**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubtitlesButton = function (_TextTrackButton) {\n  inherits(SubtitlesButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function SubtitlesButton(player, options, ready) {\n    classCallCheck(this, SubtitlesButton);\n    return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  SubtitlesButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-subtitles-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  SubtitlesButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-subtitles-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return SubtitlesButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nSubtitlesButton.prototype.kind_ = 'subtitles';\n\n/**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nSubtitlesButton.prototype.controlText_ = 'Subtitles';\n\nComponent.registerComponent('SubtitlesButton', SubtitlesButton);\n\n/**\n * @file caption-settings-menu-item.js\n */\n/**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n\nvar CaptionSettingsMenuItem = function (_TextTrackMenuItem) {\n  inherits(CaptionSettingsMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CaptionSettingsMenuItem(player, options) {\n    classCallCheck(this, CaptionSettingsMenuItem);\n\n    options.track = {\n      player: player,\n      kind: options.kind,\n      label: options.kind + ' settings',\n      selectable: false,\n      'default': false,\n      mode: 'disabled'\n    };\n\n    // CaptionSettingsMenuItem has no concept of 'selected'\n    options.selectable = false;\n\n    options.name = 'CaptionSettingsMenuItem';\n\n    var _this = possibleConstructorReturn(this, _TextTrackMenuItem.call(this, player, options));\n\n    _this.addClass('vjs-texttrack-settings');\n    _this.controlText(', opens ' + options.kind + ' settings dialog');\n    return _this;\n  }\n\n  /**\n   * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  CaptionSettingsMenuItem.prototype.handleClick = function handleClick(event) {\n    this.player().getChild('textTrackSettings').open();\n  };\n\n  return CaptionSettingsMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n\n/**\n * @file captions-button.js\n */\n/**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n\nvar CaptionsButton = function (_TextTrackButton) {\n  inherits(CaptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function CaptionsButton(player, options, ready) {\n    classCallCheck(this, CaptionsButton);\n    return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  CaptionsButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-captions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  CaptionsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-captions-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create caption menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n\n\n  CaptionsButton.prototype.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, { kind: this.kind_ }));\n\n      this.hideThreshold_ += 1;\n    }\n\n    return _TextTrackButton.prototype.createItems.call(this, items);\n  };\n\n  return CaptionsButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nCaptionsButton.prototype.kind_ = 'captions';\n\n/**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nCaptionsButton.prototype.controlText_ = 'Captions';\n\nComponent.registerComponent('CaptionsButton', CaptionsButton);\n\n/**\n * @file subs-caps-menu-item.js\n */\n/**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n\nvar SubsCapsMenuItem = function (_TextTrackMenuItem) {\n  inherits(SubsCapsMenuItem, _TextTrackMenuItem);\n\n  function SubsCapsMenuItem() {\n    classCallCheck(this, SubsCapsMenuItem);\n    return possibleConstructorReturn(this, _TextTrackMenuItem.apply(this, arguments));\n  }\n\n  SubsCapsMenuItem.prototype.createEl = function createEl(type, props, attrs) {\n    var innerHTML = '<span class=\"vjs-menu-item-text\">' + this.localize(this.options_.label);\n\n    if (this.options_.track.kind === 'captions') {\n      innerHTML += '\\n        <span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>\\n        <span class=\"vjs-control-text\"> ' + this.localize('Captions') + '</span>\\n      ';\n    }\n\n    innerHTML += '</span>';\n\n    var el = _TextTrackMenuItem.prototype.createEl.call(this, type, assign({\n      innerHTML: innerHTML\n    }, props), attrs);\n\n    return el;\n  };\n\n  return SubsCapsMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n\n/**\n * @file sub-caps-button.js\n */\n/**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubsCapsButton = function (_TextTrackButton) {\n  inherits(SubsCapsButton, _TextTrackButton);\n\n  function SubsCapsButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, SubsCapsButton);\n\n    // Although North America uses \"captions\" in most cases for\n    // \"captions and subtitles\" other locales use \"subtitles\"\n    var _this = possibleConstructorReturn(this, _TextTrackButton.call(this, player, options));\n\n    _this.label_ = 'subtitles';\n    if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {\n      _this.label_ = 'captions';\n    }\n    _this.menuButton_.controlText(toTitleCase(_this.label_));\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  SubsCapsButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-subs-caps-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  SubsCapsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-subs-caps-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create caption/subtitles menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n\n\n  SubsCapsButton.prototype.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, { kind: this.label_ }));\n\n      this.hideThreshold_ += 1;\n    }\n\n    items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);\n    return items;\n  };\n\n  return SubsCapsButton;\n}(TextTrackButton);\n\n/**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n\n\nSubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n\n/**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @private\n */\nSubsCapsButton.prototype.controlText_ = 'Subtitles';\n\nComponent.registerComponent('SubsCapsButton', SubsCapsButton);\n\n/**\n * @file audio-track-menu-item.js\n */\n/**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n\nvar AudioTrackMenuItem = function (_MenuItem) {\n  inherits(AudioTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function AudioTrackMenuItem(player, options) {\n    classCallCheck(this, AudioTrackMenuItem);\n\n    var track = options.track;\n    var tracks = player.audioTracks();\n\n    // Modify options for parent MenuItem class's init.\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.enabled;\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.track = track;\n\n    _this.addClass('vjs-' + track.kind + '-menu-item');\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_this, args);\n    };\n\n    tracks.addEventListener('change', changeHandler);\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n    return _this;\n  }\n\n  AudioTrackMenuItem.prototype.createEl = function createEl(type, props, attrs) {\n    var innerHTML = '<span class=\"vjs-menu-item-text\">' + this.localize(this.options_.label);\n\n    if (this.options_.track.kind === 'main-desc') {\n      innerHTML += '\\n        <span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>\\n        <span class=\"vjs-control-text\"> ' + this.localize('Descriptions') + '</span>\\n      ';\n    }\n\n    innerHTML += '</span>';\n\n    var el = _MenuItem.prototype.createEl.call(this, type, assign({\n      innerHTML: innerHTML\n    }, props), attrs);\n\n    return el;\n  };\n\n  /**\n   * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  AudioTrackMenuItem.prototype.handleClick = function handleClick(event) {\n    var tracks = this.player_.audioTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      track.enabled = track === this.track;\n    }\n  };\n\n  /**\n   * Handle any {@link AudioTrack} change.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link AudioTrackList#change} event that caused this to run.\n   *\n   * @listens AudioTrackList#change\n   */\n\n\n  AudioTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {\n    this.selected(this.track.enabled);\n  };\n\n  return AudioTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n\n/**\n * @file audio-track-button.js\n */\n/**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n\nvar AudioTrackButton = function (_TrackButton) {\n  inherits(AudioTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function AudioTrackButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, AudioTrackButton);\n\n    options.tracks = player.audioTracks();\n\n    return possibleConstructorReturn(this, _TrackButton.call(this, player, options));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  AudioTrackButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-audio-button ' + _TrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  AudioTrackButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-audio-button ' + _TrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create a menu item for each audio track\n   *\n   * @param {AudioTrackMenuItem[]} [items=[]]\n   *        An array of existing menu items to use.\n   *\n   * @return {AudioTrackMenuItem[]}\n   *         An array of menu items\n   */\n\n\n  AudioTrackButton.prototype.createItems = function createItems() {\n    var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n\n    // if there's only one audio track, there no point in showing it\n    this.hideThreshold_ = 1;\n\n    var tracks = this.player_.audioTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      items.push(new AudioTrackMenuItem(this.player_, {\n        track: track,\n        // MenuItem is selectable\n        selectable: true,\n        // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n        multiSelectable: false\n      }));\n    }\n\n    return items;\n  };\n\n  return AudioTrackButton;\n}(TrackButton);\n\n/**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nAudioTrackButton.prototype.controlText_ = 'Audio Track';\nComponent.registerComponent('AudioTrackButton', AudioTrackButton);\n\n/**\n * @file playback-rate-menu-item.js\n */\n/**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n\nvar PlaybackRateMenuItem = function (_MenuItem) {\n  inherits(PlaybackRateMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuItem(player, options) {\n    classCallCheck(this, PlaybackRateMenuItem);\n\n    var label = options.rate;\n    var rate = parseFloat(label, 10);\n\n    // Modify options for parent MenuItem class's init.\n    options.label = label;\n    options.selected = rate === 1;\n    options.selectable = true;\n    options.multiSelectable = false;\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.label = label;\n    _this.rate = rate;\n\n    _this.on(player, 'ratechange', _this.update);\n    return _this;\n  }\n\n  /**\n   * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  PlaybackRateMenuItem.prototype.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n    this.player().playbackRate(this.rate);\n  };\n\n  /**\n   * Update the PlaybackRateMenuItem when the playbackrate changes.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ratechange` event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n\n\n  PlaybackRateMenuItem.prototype.update = function update(event) {\n    this.selected(this.player().playbackRate() === this.rate);\n  };\n\n  return PlaybackRateMenuItem;\n}(MenuItem);\n\n/**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuItem.prototype.contentElType = 'button';\n\nComponent.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n\n/**\n * @file playback-rate-menu-button.js\n */\n/**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n\nvar PlaybackRateMenuButton = function (_MenuButton) {\n  inherits(PlaybackRateMenuButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuButton(player, options) {\n    classCallCheck(this, PlaybackRateMenuButton);\n\n    var _this = possibleConstructorReturn(this, _MenuButton.call(this, player, options));\n\n    _this.updateVisibility();\n    _this.updateLabel();\n\n    _this.on(player, 'loadstart', _this.updateVisibility);\n    _this.on(player, 'ratechange', _this.updateLabel);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  PlaybackRateMenuButton.prototype.createEl = function createEl$$1() {\n    var el = _MenuButton.prototype.createEl.call(this);\n\n    this.labelEl_ = createEl('div', {\n      className: 'vjs-playback-rate-value',\n      innerHTML: '1x'\n    });\n\n    el.appendChild(this.labelEl_);\n\n    return el;\n  };\n\n  PlaybackRateMenuButton.prototype.dispose = function dispose() {\n    this.labelEl_ = null;\n\n    _MenuButton.prototype.dispose.call(this);\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  PlaybackRateMenuButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-playback-rate ' + _MenuButton.prototype.buildCSSClass.call(this);\n  };\n\n  PlaybackRateMenuButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-playback-rate ' + _MenuButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create the playback rate menu\n   *\n   * @return {Menu}\n   *         Menu object populated with {@link PlaybackRateMenuItem}s\n   */\n\n\n  PlaybackRateMenuButton.prototype.createMenu = function createMenu() {\n    var menu = new Menu(this.player());\n    var rates = this.playbackRates();\n\n    if (rates) {\n      for (var i = rates.length - 1; i >= 0; i--) {\n        menu.addChild(new PlaybackRateMenuItem(this.player(), { rate: rates[i] + 'x' }));\n      }\n    }\n\n    return menu;\n  };\n\n  /**\n   * Updates ARIA accessibility attributes\n   */\n\n\n  PlaybackRateMenuButton.prototype.updateARIAAttributes = function updateARIAAttributes() {\n    // Current playback rate\n    this.el().setAttribute('aria-valuenow', this.player().playbackRate());\n  };\n\n  /**\n   * This gets called when an `PlaybackRateMenuButton` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  PlaybackRateMenuButton.prototype.handleClick = function handleClick(event) {\n    // select next rate option\n    var currentRate = this.player().playbackRate();\n    var rates = this.playbackRates();\n\n    // this will select first one if the last one currently selected\n    var newRate = rates[0];\n\n    for (var i = 0; i < rates.length; i++) {\n      if (rates[i] > currentRate) {\n        newRate = rates[i];\n        break;\n      }\n    }\n    this.player().playbackRate(newRate);\n  };\n\n  /**\n   * Get possible playback rates\n   *\n   * @return {Array}\n   *         All possible playback rates\n   */\n\n\n  PlaybackRateMenuButton.prototype.playbackRates = function playbackRates() {\n    return this.options_.playbackRates || this.options_.playerOptions && this.options_.playerOptions.playbackRates;\n  };\n\n  /**\n   * Get whether playback rates is supported by the tech\n   * and an array of playback rates exists\n   *\n   * @return {boolean}\n   *         Whether changing playback rate is supported\n   */\n\n\n  PlaybackRateMenuButton.prototype.playbackRateSupported = function playbackRateSupported() {\n    return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n  };\n\n  /**\n   * Hide playback rate controls when they're no playback rate options to select\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#loadstart\n   */\n\n\n  PlaybackRateMenuButton.prototype.updateVisibility = function updateVisibility(event) {\n    if (this.playbackRateSupported()) {\n      this.removeClass('vjs-hidden');\n    } else {\n      this.addClass('vjs-hidden');\n    }\n  };\n\n  /**\n   * Update button label when rate changed\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n\n\n  PlaybackRateMenuButton.prototype.updateLabel = function updateLabel(event) {\n    if (this.playbackRateSupported()) {\n      this.labelEl_.innerHTML = this.player().playbackRate() + 'x';\n    }\n  };\n\n  return PlaybackRateMenuButton;\n}(MenuButton);\n\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\n\nComponent.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n\n/**\n * @file spacer.js\n */\n/**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n\nvar Spacer = function (_Component) {\n  inherits(Spacer, _Component);\n\n  function Spacer() {\n    classCallCheck(this, Spacer);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  Spacer.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-spacer ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  Spacer.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass()\n    });\n  };\n\n  return Spacer;\n}(Component);\n\nComponent.registerComponent('Spacer', Spacer);\n\n/**\n * @file custom-control-spacer.js\n */\n/**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n\nvar CustomControlSpacer = function (_Spacer) {\n  inherits(CustomControlSpacer, _Spacer);\n\n  function CustomControlSpacer() {\n    classCallCheck(this, CustomControlSpacer);\n    return possibleConstructorReturn(this, _Spacer.apply(this, arguments));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  CustomControlSpacer.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-custom-control-spacer ' + _Spacer.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  CustomControlSpacer.prototype.createEl = function createEl() {\n    var el = _Spacer.prototype.createEl.call(this, {\n      className: this.buildCSSClass()\n    });\n\n    // No-flex/table-cell mode requires there be some content\n    // in the cell to fill the remaining space of the table.\n    el.innerHTML = '\\xA0';\n    return el;\n  };\n\n  return CustomControlSpacer;\n}(Spacer);\n\nComponent.registerComponent('CustomControlSpacer', CustomControlSpacer);\n\n/**\n * @file control-bar.js\n */\n// Required children\n/**\n * Container of main controls.\n *\n * @extends Component\n */\n\nvar ControlBar = function (_Component) {\n  inherits(ControlBar, _Component);\n\n  function ControlBar() {\n    classCallCheck(this, ControlBar);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ControlBar.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-control-bar',\n      dir: 'ltr'\n    });\n  };\n\n  return ControlBar;\n}(Component);\n\n/**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n\n\nControlBar.prototype.options_ = {\n  children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n};\n\nComponent.registerComponent('ControlBar', ControlBar);\n\n/**\n * @file error-display.js\n */\n/**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n\nvar ErrorDisplay = function (_ModalDialog) {\n  inherits(ErrorDisplay, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ErrorDisplay(player, options) {\n    classCallCheck(this, ErrorDisplay);\n\n    var _this = possibleConstructorReturn(this, _ModalDialog.call(this, player, options));\n\n    _this.on(player, 'error', _this.open);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  ErrorDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-error-display ' + _ModalDialog.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Gets the localized error message based on the `Player`s error.\n   *\n   * @return {string}\n   *         The `Player`s error message localized or an empty string.\n   */\n\n\n  ErrorDisplay.prototype.content = function content() {\n    var error = this.player().error();\n\n    return error ? this.localize(error.message) : '';\n  };\n\n  return ErrorDisplay;\n}(ModalDialog);\n\n/**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n\n\nErrorDisplay.prototype.options_ = mergeOptions(ModalDialog.prototype.options_, {\n  pauseOnOpen: false,\n  fillAlways: true,\n  temporary: false,\n  uncloseable: true\n});\n\nComponent.registerComponent('ErrorDisplay', ErrorDisplay);\n\n/**\n * @file text-track-settings.js\n */\nvar LOCAL_STORAGE_KEY = 'vjs-text-track-settings';\n\nvar COLOR_BLACK = ['#000', 'Black'];\nvar COLOR_BLUE = ['#00F', 'Blue'];\nvar COLOR_CYAN = ['#0FF', 'Cyan'];\nvar COLOR_GREEN = ['#0F0', 'Green'];\nvar COLOR_MAGENTA = ['#F0F', 'Magenta'];\nvar COLOR_RED = ['#F00', 'Red'];\nvar COLOR_WHITE = ['#FFF', 'White'];\nvar COLOR_YELLOW = ['#FF0', 'Yellow'];\n\nvar OPACITY_OPAQUE = ['1', 'Opaque'];\nvar OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\nvar OPACITY_TRANS = ['0', 'Transparent'];\n\n// Configuration for the various <select> elements in the DOM of this component.\n//\n// Possible keys include:\n//\n// `default`:\n//   The default option index. Only needs to be provided if not zero.\n// `parser`:\n//   A function which is used to parse the value from the selected option in\n//   a customized way.\n// `selector`:\n//   The selector used to find the associated <select> element.\nvar selectConfigs = {\n  backgroundColor: {\n    selector: '.vjs-bg-color > select',\n    id: 'captions-background-color-%s',\n    label: 'Color',\n    options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n\n  backgroundOpacity: {\n    selector: '.vjs-bg-opacity > select',\n    id: 'captions-background-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n  },\n\n  color: {\n    selector: '.vjs-fg-color > select',\n    id: 'captions-foreground-color-%s',\n    label: 'Color',\n    options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n\n  edgeStyle: {\n    selector: '.vjs-edge-style > select',\n    id: '%s',\n    label: 'Text Edge Style',\n    options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n  },\n\n  fontFamily: {\n    selector: '.vjs-font-family > select',\n    id: 'captions-font-family-%s',\n    label: 'Font Family',\n    options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n  },\n\n  fontPercent: {\n    selector: '.vjs-font-percent > select',\n    id: 'captions-font-size-%s',\n    label: 'Font Size',\n    options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n    'default': 2,\n    parser: function parser(v) {\n      return v === '1.00' ? null : Number(v);\n    }\n  },\n\n  textOpacity: {\n    selector: '.vjs-text-opacity > select',\n    id: 'captions-foreground-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI]\n  },\n\n  // Options for this object are defined below.\n  windowColor: {\n    selector: '.vjs-window-color > select',\n    id: 'captions-window-color-%s',\n    label: 'Color'\n  },\n\n  // Options for this object are defined below.\n  windowOpacity: {\n    selector: '.vjs-window-opacity > select',\n    id: 'captions-window-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n  }\n};\n\nselectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n\n/**\n * Get the actual value of an option.\n *\n * @param  {string} value\n *         The value to get\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\nfunction parseOptionValue(value, parser) {\n  if (parser) {\n    value = parser(value);\n  }\n\n  if (value && value !== 'none') {\n    return value;\n  }\n}\n\n/**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param  {Element} el\n *         the element to look in\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\nfunction getSelectedOptionValue(el, parser) {\n  var value = el.options[el.options.selectedIndex].value;\n\n  return parseOptionValue(value, parser);\n}\n\n/**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n *        The element to look in.\n *\n * @param {string} value\n *        the property to look on.\n *\n * @param {Function} [parser]\n *        Optional function to adjust the value before comparing.\n *\n * @private\n */\nfunction setSelectedOption(el, value, parser) {\n  if (!value) {\n    return;\n  }\n\n  for (var i = 0; i < el.options.length; i++) {\n    if (parseOptionValue(el.options[i].value, parser) === value) {\n      el.selectedIndex = i;\n      break;\n    }\n  }\n}\n\n/**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n\nvar TextTrackSettings = function (_ModalDialog) {\n  inherits(TextTrackSettings, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *         The key/value store of player options.\n   */\n  function TextTrackSettings(player, options) {\n    classCallCheck(this, TextTrackSettings);\n\n    options.temporary = false;\n\n    var _this = possibleConstructorReturn(this, _ModalDialog.call(this, player, options));\n\n    _this.updateDisplay = bind(_this, _this.updateDisplay);\n\n    // fill the modal and pretend we have opened it\n    _this.fill();\n    _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;\n\n    _this.endDialog = createEl('p', {\n      className: 'vjs-control-text',\n      textContent: _this.localize('End of dialog window.')\n    });\n    _this.el().appendChild(_this.endDialog);\n\n    _this.setDefaults();\n\n    // Grab `persistTextTrackSettings` from the player options if not passed in child options\n    if (options.persistTextTrackSettings === undefined) {\n      _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;\n    }\n\n    _this.on(_this.$('.vjs-done-button'), 'click', function () {\n      _this.saveSettings();\n      _this.close();\n    });\n\n    _this.on(_this.$('.vjs-default-button'), 'click', function () {\n      _this.setDefaults();\n      _this.updateDisplay();\n    });\n\n    each(selectConfigs, function (config) {\n      _this.on(_this.$(config.selector), 'change', _this.updateDisplay);\n    });\n\n    if (_this.options_.persistTextTrackSettings) {\n      _this.restoreSettings();\n    }\n    return _this;\n  }\n\n  TextTrackSettings.prototype.dispose = function dispose() {\n    this.endDialog = null;\n\n    _ModalDialog.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create a <select> element with configured options.\n   *\n   * @param {string} key\n   *        Configuration key to use during creation.\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElSelect_ = function createElSelect_(key) {\n    var _this2 = this;\n\n    var legendId = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';\n    var type = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'label';\n\n    var config = selectConfigs[key];\n    var id = config.id.replace('%s', this.id_);\n    var selectLabelledbyIds = [legendId, id].join(' ').trim();\n\n    return ['<' + type + ' id=\"' + id + '\" class=\"' + (type === 'label' ? 'vjs-label' : '') + '\">', this.localize(config.label), '</' + type + '>', '<select aria-labelledby=\"' + selectLabelledbyIds + '\">'].concat(config.options.map(function (o) {\n      var optionId = id + '-' + o[1].replace(/\\W+/g, '');\n\n      return ['<option id=\"' + optionId + '\" value=\"' + o[0] + '\" ', 'aria-labelledby=\"' + selectLabelledbyIds + ' ' + optionId + '\">', _this2.localize(o[1]), '</option>'].join('');\n    })).concat('</select>').join('');\n  };\n\n  /**\n   * Create foreground color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElFgColor_ = function createElFgColor_() {\n    var legendId = 'captions-text-legend-' + this.id_;\n\n    return ['<fieldset class=\"vjs-fg-color vjs-track-setting\">', '<legend id=\"' + legendId + '\">', this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n  };\n\n  /**\n   * Create background color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElBgColor_ = function createElBgColor_() {\n    var legendId = 'captions-background-' + this.id_;\n\n    return ['<fieldset class=\"vjs-bg-color vjs-track-setting\">', '<legend id=\"' + legendId + '\">', this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n  };\n\n  /**\n   * Create window color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElWinColor_ = function createElWinColor_() {\n    var legendId = 'captions-window-' + this.id_;\n\n    return ['<fieldset class=\"vjs-window-color vjs-track-setting\">', '<legend id=\"' + legendId + '\">', this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n  };\n\n  /**\n   * Create color elements for the component\n   *\n   * @return {Element}\n   *         The element that was created\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElColors_ = function createElColors_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-colors',\n      innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n    });\n  };\n\n  /**\n   * Create font elements for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElFont_ = function createElFont_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-font',\n      innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n    });\n  };\n\n  /**\n   * Create controls for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElControls_ = function createElControls_() {\n    var defaultsDescription = this.localize('restore all settings to the default values');\n\n    return createEl('div', {\n      className: 'vjs-track-settings-controls',\n      innerHTML: ['<button type=\"button\" class=\"vjs-default-button\" title=\"' + defaultsDescription + '\">', this.localize('Reset'), '<span class=\"vjs-control-text\"> ' + defaultsDescription + '</span>', '</button>', '<button type=\"button\" class=\"vjs-done-button\">' + this.localize('Done') + '</button>'].join('')\n    });\n  };\n\n  TextTrackSettings.prototype.content = function content() {\n    return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n  };\n\n  TextTrackSettings.prototype.label = function label() {\n    return this.localize('Caption Settings Dialog');\n  };\n\n  TextTrackSettings.prototype.description = function description() {\n    return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n  };\n\n  TextTrackSettings.prototype.buildCSSClass = function buildCSSClass() {\n    return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';\n  };\n\n  /**\n   * Gets an object of text track settings (or null).\n   *\n   * @return {Object}\n   *         An object with config values parsed from the DOM or localStorage.\n   */\n\n\n  TextTrackSettings.prototype.getValues = function getValues() {\n    var _this3 = this;\n\n    return reduce(selectConfigs, function (accum, config, key) {\n      var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);\n\n      if (value !== undefined) {\n        accum[key] = value;\n      }\n\n      return accum;\n    }, {});\n  };\n\n  /**\n   * Sets text track settings from an object of values.\n   *\n   * @param {Object} values\n   *        An object with config values parsed from the DOM or localStorage.\n   */\n\n\n  TextTrackSettings.prototype.setValues = function setValues(values) {\n    var _this4 = this;\n\n    each(selectConfigs, function (config, key) {\n      setSelectedOption(_this4.$(config.selector), values[key], config.parser);\n    });\n  };\n\n  /**\n   * Sets all `<select>` elements to their default values.\n   */\n\n\n  TextTrackSettings.prototype.setDefaults = function setDefaults() {\n    var _this5 = this;\n\n    each(selectConfigs, function (config) {\n      var index = config.hasOwnProperty('default') ? config['default'] : 0;\n\n      _this5.$(config.selector).selectedIndex = index;\n    });\n  };\n\n  /**\n   * Restore texttrack settings from localStorage\n   */\n\n\n  TextTrackSettings.prototype.restoreSettings = function restoreSettings() {\n    var values = void 0;\n\n    try {\n      values = JSON.parse(window.localStorage.getItem(LOCAL_STORAGE_KEY));\n    } catch (err) {\n      log.warn(err);\n    }\n\n    if (values) {\n      this.setValues(values);\n    }\n  };\n\n  /**\n   * Save text track settings to localStorage\n   */\n\n\n  TextTrackSettings.prototype.saveSettings = function saveSettings() {\n    if (!this.options_.persistTextTrackSettings) {\n      return;\n    }\n\n    var values = this.getValues();\n\n    try {\n      if (Object.keys(values).length) {\n        window.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(values));\n      } else {\n        window.localStorage.removeItem(LOCAL_STORAGE_KEY);\n      }\n    } catch (err) {\n      log.warn(err);\n    }\n  };\n\n  /**\n   * Update display of text track settings\n   */\n\n\n  TextTrackSettings.prototype.updateDisplay = function updateDisplay() {\n    var ttDisplay = this.player_.getChild('textTrackDisplay');\n\n    if (ttDisplay) {\n      ttDisplay.updateDisplay();\n    }\n  };\n\n  /**\n   * conditionally blur the element and refocus the captions button\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.conditionalBlur_ = function conditionalBlur_() {\n    this.previouslyActiveEl_ = null;\n    this.off(document, 'keydown', this.handleKeyDown);\n\n    var cb = this.player_.controlBar;\n    var subsCapsBtn = cb && cb.subsCapsButton;\n    var ccBtn = cb && cb.captionsButton;\n\n    if (subsCapsBtn) {\n      subsCapsBtn.focus();\n    } else if (ccBtn) {\n      ccBtn.focus();\n    }\n  };\n\n  return TextTrackSettings;\n}(ModalDialog);\n\nComponent.registerComponent('TextTrackSettings', TextTrackSettings);\n\n/**\n * @file resize-manager.js\n */\n/**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n *   resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n\nvar ResizeManager = function (_Component) {\n  inherits(ResizeManager, _Component);\n\n  /**\n   * Create the ResizeManager.\n   *\n   * @param {Object} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of ResizeManager options.\n   *\n   * @param {Object} [options.ResizeObserver]\n   *        A polyfill for ResizeObserver can be passed in here.\n   *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n   */\n  function ResizeManager(player, options) {\n    classCallCheck(this, ResizeManager);\n\n    var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window.ResizeObserver;\n\n    // if `null` was passed, we want to disable the ResizeObserver\n    if (options.ResizeObserver === null) {\n      RESIZE_OBSERVER_AVAILABLE = false;\n    }\n\n    // Only create an element when ResizeObserver isn't available\n    var options_ = mergeOptions({ createEl: !RESIZE_OBSERVER_AVAILABLE }, options);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options_));\n\n    _this.ResizeObserver = options.ResizeObserver || window.ResizeObserver;\n    _this.loadListener_ = null;\n    _this.resizeObserver_ = null;\n    _this.debouncedHandler_ = debounce(function () {\n      _this.resizeHandler();\n    }, 100, false, _this);\n\n    if (RESIZE_OBSERVER_AVAILABLE) {\n      _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);\n      _this.resizeObserver_.observe(player.el());\n    } else {\n      _this.loadListener_ = function () {\n        if (!_this.el_ || !_this.el_.contentWindow) {\n          return;\n        }\n\n        on(_this.el_.contentWindow, 'resize', _this.debouncedHandler_);\n      };\n\n      _this.one('load', _this.loadListener_);\n    }\n    return _this;\n  }\n\n  ResizeManager.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'iframe', {\n      className: 'vjs-resize-manager'\n    });\n  };\n\n  /**\n   * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n   *\n   * @fires Player#playerresize\n   */\n\n\n  ResizeManager.prototype.resizeHandler = function resizeHandler() {\n    /**\n     * Called when the player size has changed\n     *\n     * @event Player#playerresize\n     * @type {EventTarget~Event}\n     */\n    // make sure player is still around to trigger\n    // prevents this from causing an error after dispose\n    if (!this.player_ || !this.player_.trigger) {\n      return;\n    }\n\n    this.player_.trigger('playerresize');\n  };\n\n  ResizeManager.prototype.dispose = function dispose() {\n    if (this.debouncedHandler_) {\n      this.debouncedHandler_.cancel();\n    }\n\n    if (this.resizeObserver_) {\n      if (this.player_.el()) {\n        this.resizeObserver_.unobserve(this.player_.el());\n      }\n      this.resizeObserver_.disconnect();\n    }\n\n    if (this.el_ && this.el_.contentWindow) {\n      off(this.el_.contentWindow, 'resize', this.debouncedHandler_);\n    }\n\n    if (this.loadListener_) {\n      this.off('load', this.loadListener_);\n    }\n\n    this.ResizeObserver = null;\n    this.resizeObserver = null;\n    this.debouncedHandler_ = null;\n    this.loadListener_ = null;\n  };\n\n  return ResizeManager;\n}(Component);\n\nComponent.registerComponent('ResizeManager', ResizeManager);\n\n/**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param {Html5} tech\n *        The tech object that sourceset was setup on\n *\n * @return {boolean}\n *         returns false if the sourceset was not fired and true otherwise.\n */\nvar sourcesetLoad = function sourcesetLoad(tech) {\n  var el = tech.el();\n\n  // if `el.src` is set, that source will be loaded.\n  if (el.hasAttribute('src')) {\n    tech.triggerSourceset(el.src);\n    return true;\n  }\n\n  /**\n   * Since there isn't a src property on the media element, source elements will be used for\n   * implementing the source selection algorithm. This happens asynchronously and\n   * for most cases were there is more than one source we cannot tell what source will\n   * be loaded, without re-implementing the source selection algorithm. At this time we are not\n   * going to do that. There are three special cases that we do handle here though:\n   *\n   * 1. If there are no sources, do not fire `sourceset`.\n   * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n   * 3. If there is more than one `<source>` but all of them have the same `src` url.\n   *    That will be our src.\n   */\n  var sources = tech.$$('source');\n  var srcUrls = [];\n  var src = '';\n\n  // if there are no sources, do not fire sourceset\n  if (!sources.length) {\n    return false;\n  }\n\n  // only count valid/non-duplicate source elements\n  for (var i = 0; i < sources.length; i++) {\n    var url = sources[i].src;\n\n    if (url && srcUrls.indexOf(url) === -1) {\n      srcUrls.push(url);\n    }\n  }\n\n  // there were no valid sources\n  if (!srcUrls.length) {\n    return false;\n  }\n\n  // there is only one valid source element url\n  // use that\n  if (srcUrls.length === 1) {\n    src = srcUrls[0];\n  }\n\n  tech.triggerSourceset(src);\n  return true;\n};\n\n/**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\nvar innerHTMLDescriptorPolyfill = {};\n\nif (!IS_IE8) {\n  innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n    get: function get() {\n      return this.cloneNode(true).innerHTML;\n    },\n    set: function set(v) {\n      // make a dummy node to use innerHTML on\n      var dummy = document.createElement(this.nodeName.toLowerCase());\n\n      // set innerHTML to the value provided\n      dummy.innerHTML = v;\n\n      // make a document fragment to hold the nodes from dummy\n      var docFrag = document.createDocumentFragment();\n\n      // copy all of the nodes created by the innerHTML on dummy\n      // to the document fragment\n      while (dummy.childNodes.length) {\n        docFrag.appendChild(dummy.childNodes[0]);\n      }\n\n      // remove content\n      this.innerText = '';\n\n      // now we add all of that html in one by appending the\n      // document fragment. This is how innerHTML does it.\n      window.Element.prototype.appendChild.call(this, docFrag);\n\n      // then return the result that innerHTML's setter would\n      return this.innerHTML;\n    }\n  });\n}\n/**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\nvar getDescriptor = function getDescriptor(priority, prop) {\n  var descriptor = {};\n\n  for (var i = 0; i < priority.length; i++) {\n    descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n\n    if (descriptor && descriptor.set && descriptor.get) {\n      break;\n    }\n  }\n\n  descriptor.enumerable = true;\n  descriptor.configurable = true;\n\n  return descriptor;\n};\n\nvar getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {\n  return getDescriptor([tech.el(), window.HTMLMediaElement.prototype, window.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n};\n\n/**\n * Patches browser internal functions so that we can tell syncronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element\n * - `innerHTML` -  can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n *        The tech object that sourceset is being setup on.\n */\nvar firstSourceWatch = function firstSourceWatch(tech) {\n  var el = tech.el();\n\n  // make sure firstSourceWatch isn't setup twice.\n  if (el.resetSourceWatch_) {\n    return;\n  }\n\n  var old = {};\n  var innerDescriptor = getInnerHTMLDescriptor(tech);\n  var appendWrapper = function appendWrapper(appendFn) {\n    return function () {\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var retval = appendFn.apply(el, args);\n\n      sourcesetLoad(tech);\n\n      return retval;\n    };\n  };\n\n  ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {\n    if (!el[k]) {\n      return;\n    }\n\n    // store the old function\n    old[k] = el[k];\n\n    // call the old function with a sourceset if a source\n    // was loaded\n    el[k] = appendWrapper(old[k]);\n  });\n\n  Object.defineProperty(el, 'innerHTML', mergeOptions(innerDescriptor, {\n    set: appendWrapper(innerDescriptor.set)\n  }));\n\n  el.resetSourceWatch_ = function () {\n    el.resetSourceWatch_ = null;\n    Object.keys(old).forEach(function (k) {\n      el[k] = old[k];\n    });\n\n    Object.defineProperty(el, 'innerHTML', innerDescriptor);\n  };\n\n  // on the first sourceset, we need to revert our changes\n  tech.one('sourceset', el.resetSourceWatch_);\n};\n\n/**\n * our implementation of a `src` descriptor for browsers\n * that do not have one.\n */\n\nvar srcDescriptorPolyfill = {};\n\nif (!IS_IE8) {\n  srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n    get: function get() {\n      if (this.hasAttribute('src')) {\n        return getAbsoluteURL(window.Element.prototype.getAttribute.call(this, 'src'));\n      }\n\n      return '';\n    },\n    set: function set(v) {\n      window.Element.prototype.setAttribute.call(this, 'src', v);\n\n      return v;\n    }\n  });\n}\n\nvar getSrcDescriptor = function getSrcDescriptor(tech) {\n  return getDescriptor([tech.el(), window.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n};\n\n/**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n *              cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n *        The tech to patch\n */\nvar setupSourceset = function setupSourceset(tech) {\n  if (!tech.featuresSourceset) {\n    return;\n  }\n\n  var el = tech.el();\n\n  // make sure sourceset isn't setup twice.\n  if (el.resetSourceset_) {\n    return;\n  }\n\n  var srcDescriptor = getSrcDescriptor(tech);\n  var oldSetAttribute = el.setAttribute;\n  var oldLoad = el.load;\n\n  Object.defineProperty(el, 'src', mergeOptions(srcDescriptor, {\n    set: function set(v) {\n      var retval = srcDescriptor.set.call(el, v);\n\n      // we use the getter here to get the actual value set on src\n      tech.triggerSourceset(el.src);\n\n      return retval;\n    }\n  }));\n\n  el.setAttribute = function (n, v) {\n    var retval = oldSetAttribute.call(el, n, v);\n\n    if (/src/i.test(n)) {\n      tech.triggerSourceset(el.src);\n    }\n\n    return retval;\n  };\n\n  el.load = function () {\n    var retval = oldLoad.call(el);\n\n    // if load was called, but there was no source to fire\n    // sourceset on. We have to watch for a source append\n    // as that can trigger a `sourceset` when the media element\n    // has no source\n    if (!sourcesetLoad(tech)) {\n      tech.triggerSourceset('');\n      firstSourceWatch(tech);\n    }\n\n    return retval;\n  };\n\n  if (el.currentSrc) {\n    tech.triggerSourceset(el.currentSrc);\n  } else if (!sourcesetLoad(tech)) {\n    firstSourceWatch(tech);\n  }\n\n  el.resetSourceset_ = function () {\n    el.resetSourceset_ = null;\n    el.load = oldLoad;\n    el.setAttribute = oldSetAttribute;\n    Object.defineProperty(el, 'src', srcDescriptor);\n    if (el.resetSourceWatch_) {\n      el.resetSourceWatch_();\n    }\n  };\n};\n\nvar _templateObject$2 = taggedTemplateLiteralLoose(['Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n            This may prevent text tracks from loading.'], ['Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n            This may prevent text tracks from loading.']);\n\n/**\n * @file html5.js\n */\n/**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SouceHandlerAdditions\n * @extends Tech\n */\n\nvar Html5 = function (_Tech) {\n  inherits(Html5, _Tech);\n\n  /**\n   * Create an instance of this Tech.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} ready\n   *        Callback function to call when the `HTML5` Tech is ready.\n   */\n  function Html5(options, ready) {\n    classCallCheck(this, Html5);\n\n    var _this = possibleConstructorReturn(this, _Tech.call(this, options, ready));\n\n    var source = options.source;\n    var crossoriginTracks = false;\n\n    // Set the source if one is provided\n    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n    // anyway so the error gets fired.\n    if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n      _this.setSource(source);\n    } else {\n      _this.handleLateInit_(_this.el_);\n    }\n\n    // setup sourceset after late sourceset/init\n    if (options.enableSourceset) {\n      _this.setupSourcesetHandling_();\n    }\n\n    if (_this.el_.hasChildNodes()) {\n\n      var nodes = _this.el_.childNodes;\n      var nodesLength = nodes.length;\n      var removeNodes = [];\n\n      while (nodesLength--) {\n        var node = nodes[nodesLength];\n        var nodeName = node.nodeName.toLowerCase();\n\n        if (nodeName === 'track') {\n          if (!_this.featuresNativeTextTracks) {\n            // Empty video tag tracks so the built-in player doesn't use them also.\n            // This may not be fast enough to stop HTML5 browsers from reading the tags\n            // so we'll need to turn off any default tracks if we're manually doing\n            // captions and subtitles. videoElement.textTracks\n            removeNodes.push(node);\n          } else {\n            // store HTMLTrackElement and TextTrack to remote list\n            _this.remoteTextTrackEls().addTrackElement_(node);\n            _this.remoteTextTracks().addTrack(node.track);\n            _this.textTracks().addTrack(node.track);\n            if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n              crossoriginTracks = true;\n            }\n          }\n        }\n      }\n\n      for (var i = 0; i < removeNodes.length; i++) {\n        _this.el_.removeChild(removeNodes[i]);\n      }\n    }\n\n    _this.proxyNativeTracks_();\n    if (_this.featuresNativeTextTracks && crossoriginTracks) {\n      log.warn(tsml(_templateObject$2));\n    }\n\n    // prevent iOS Safari from disabling metadata text tracks during native playback\n    _this.restoreMetadataTracksInIOSNativePlayer_();\n\n    // Determine if native controls should be used\n    // Our goal should be to get the custom controls on mobile solid everywhere\n    // so we can remove this all together. Right now this will block custom\n    // controls on touch enabled laptops like the Chrome Pixel\n    if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {\n      _this.setControls(true);\n    }\n\n    // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n    // into a `fullscreenchange` event\n    _this.proxyWebkitFullscreen_();\n\n    _this.triggerReady();\n    return _this;\n  }\n\n  /**\n   * Dispose of `HTML5` media element and remove all tracks.\n   */\n\n\n  Html5.prototype.dispose = function dispose() {\n    if (this.el_ && this.el_.resetSourceset_) {\n      this.el_.resetSourceset_();\n    }\n    Html5.disposeMediaElement(this.el_);\n    this.options_ = null;\n\n    // tech will handle clearing of the emulated track list\n    _Tech.prototype.dispose.call(this);\n  };\n\n  /**\n   * Modify the media element so that we can detect when\n   * the source is changed. Fires `sourceset` just after the source has changed\n   */\n\n\n  Html5.prototype.setupSourcesetHandling_ = function setupSourcesetHandling_() {\n    setupSourceset(this);\n  };\n\n  /**\n   * When a captions track is enabled in the iOS Safari native player, all other\n   * tracks are disabled (including metadata tracks), which nulls all of their\n   * associated cue points. This will restore metadata tracks to their pre-fullscreen\n   * state in those cases so that cue points are not needlessly lost.\n   *\n   * @private\n   */\n\n\n  Html5.prototype.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {\n    var textTracks = this.textTracks();\n    var metadataTracksPreFullscreenState = void 0;\n\n    // captures a snapshot of every metadata track's current state\n    var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {\n      metadataTracksPreFullscreenState = [];\n\n      for (var i = 0; i < textTracks.length; i++) {\n        var track = textTracks[i];\n\n        if (track.kind === 'metadata') {\n          metadataTracksPreFullscreenState.push({\n            track: track,\n            storedMode: track.mode\n          });\n        }\n      }\n    };\n\n    // snapshot each metadata track's initial state, and update the snapshot\n    // each time there is a track 'change' event\n    takeMetadataTrackSnapshot();\n    textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n\n    this.on('dispose', function () {\n      return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n    });\n\n    var restoreTrackMode = function restoreTrackMode() {\n      for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n        var storedTrack = metadataTracksPreFullscreenState[i];\n\n        if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n          storedTrack.track.mode = storedTrack.storedMode;\n        }\n      }\n      // we only want this handler to be executed on the first 'change' event\n      textTracks.removeEventListener('change', restoreTrackMode);\n    };\n\n    // when we enter fullscreen playback, stop updating the snapshot and\n    // restore all track modes to their pre-fullscreen state\n    this.on('webkitbeginfullscreen', function () {\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', restoreTrackMode);\n      textTracks.addEventListener('change', restoreTrackMode);\n    });\n\n    // start updating the snapshot again after leaving fullscreen\n    this.on('webkitendfullscreen', function () {\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n      textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n\n      // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n      textTracks.removeEventListener('change', restoreTrackMode);\n    });\n  };\n\n  /**\n   * Proxy all native track list events to our track lists if the browser we are playing\n   * in supports that type of track list.\n   *\n   * @private\n   */\n\n\n  Html5.prototype.proxyNativeTracks_ = function proxyNativeTracks_() {\n    var _this2 = this;\n\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n      var elTracks = _this2.el()[props.getterName];\n      var techTracks = _this2[props.getterName]();\n\n      if (!_this2['featuresNative' + props.capitalName + 'Tracks'] || !elTracks || !elTracks.addEventListener) {\n        return;\n      }\n      var listeners = {\n        change: function change(e) {\n          techTracks.trigger({\n            type: 'change',\n            target: techTracks,\n            currentTarget: techTracks,\n            srcElement: techTracks\n          });\n        },\n        addtrack: function addtrack(e) {\n          techTracks.addTrack(e.track);\n        },\n        removetrack: function removetrack(e) {\n          techTracks.removeTrack(e.track);\n        }\n      };\n      var removeOldTracks = function removeOldTracks() {\n        var removeTracks = [];\n\n        for (var i = 0; i < techTracks.length; i++) {\n          var found = false;\n\n          for (var j = 0; j < elTracks.length; j++) {\n            if (elTracks[j] === techTracks[i]) {\n              found = true;\n              break;\n            }\n          }\n\n          if (!found) {\n            removeTracks.push(techTracks[i]);\n          }\n        }\n\n        while (removeTracks.length) {\n          techTracks.removeTrack(removeTracks.shift());\n        }\n      };\n\n      Object.keys(listeners).forEach(function (eventName) {\n        var listener = listeners[eventName];\n\n        elTracks.addEventListener(eventName, listener);\n        _this2.on('dispose', function (e) {\n          return elTracks.removeEventListener(eventName, listener);\n        });\n      });\n\n      // Remove (native) tracks that are not used anymore\n      _this2.on('loadstart', removeOldTracks);\n      _this2.on('dispose', function (e) {\n        return _this2.off('loadstart', removeOldTracks);\n      });\n    });\n  };\n\n  /**\n   * Create the `Html5` Tech's DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  Html5.prototype.createEl = function createEl$$1() {\n    var el = this.options_.tag;\n\n    // Check if this browser supports moving the element into the box.\n    // On the iPhone video will break if you move the element,\n    // So we have to create a brand new element.\n    // If we ingested the player div, we do not need to move the media element.\n    if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n\n      // If the original tag is still there, clone and remove it.\n      if (el) {\n        var clone = el.cloneNode(true);\n\n        if (el.parentNode) {\n          el.parentNode.insertBefore(clone, el);\n        }\n        Html5.disposeMediaElement(el);\n        el = clone;\n      } else {\n        el = document.createElement('video');\n\n        // determine if native controls should be used\n        var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n        var attributes = mergeOptions({}, tagAttributes);\n\n        if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n          delete attributes.controls;\n        }\n\n        setAttributes(el, assign(attributes, {\n          id: this.options_.techId,\n          'class': 'vjs-tech'\n        }));\n      }\n\n      el.playerId = this.options_.playerId;\n    }\n\n    if (typeof this.options_.preload !== 'undefined') {\n      setAttribute(el, 'preload', this.options_.preload);\n    }\n\n    // Update specific tag settings, in case they were overridden\n    // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n    // when iOS/Safari or other browsers attempt to autoplay.\n    var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n\n    for (var i = 0; i < settingsAttrs.length; i++) {\n      var attr = settingsAttrs[i];\n      var value = this.options_[attr];\n\n      if (typeof value !== 'undefined') {\n        if (value) {\n          setAttribute(el, attr, attr);\n        } else {\n          removeAttribute(el, attr);\n        }\n        el[attr] = value;\n      }\n    }\n\n    return el;\n  };\n\n  /**\n   * This will be triggered if the loadstart event has already fired, before videojs was\n   * ready. Two known examples of when this can happen are:\n   * 1. If we're loading the playback object after it has started loading\n   * 2. The media is already playing the (often with autoplay on) then\n   *\n   * This function will fire another loadstart so that videojs can catchup.\n   *\n   * @fires Tech#loadstart\n   *\n   * @return {undefined}\n   *         returns nothing.\n   */\n\n\n  Html5.prototype.handleLateInit_ = function handleLateInit_(el) {\n    if (el.networkState === 0 || el.networkState === 3) {\n      // The video element hasn't started loading the source yet\n      // or didn't find a source\n      return;\n    }\n\n    if (el.readyState === 0) {\n      // NetworkState is set synchronously BUT loadstart is fired at the\n      // end of the current stack, usually before setInterval(fn, 0).\n      // So at this point we know loadstart may have already fired or is\n      // about to fire, and either way the player hasn't seen it yet.\n      // We don't want to fire loadstart prematurely here and cause a\n      // double loadstart so we'll wait and see if it happens between now\n      // and the next loop, and fire it if not.\n      // HOWEVER, we also want to make sure it fires before loadedmetadata\n      // which could also happen between now and the next loop, so we'll\n      // watch for that also.\n      var loadstartFired = false;\n      var setLoadstartFired = function setLoadstartFired() {\n        loadstartFired = true;\n      };\n\n      this.on('loadstart', setLoadstartFired);\n\n      var triggerLoadstart = function triggerLoadstart() {\n        // We did miss the original loadstart. Make sure the player\n        // sees loadstart before loadedmetadata\n        if (!loadstartFired) {\n          this.trigger('loadstart');\n        }\n      };\n\n      this.on('loadedmetadata', triggerLoadstart);\n\n      this.ready(function () {\n        this.off('loadstart', setLoadstartFired);\n        this.off('loadedmetadata', triggerLoadstart);\n\n        if (!loadstartFired) {\n          // We did miss the original native loadstart. Fire it now.\n          this.trigger('loadstart');\n        }\n      });\n\n      return;\n    }\n\n    // From here on we know that loadstart already fired and we missed it.\n    // The other readyState events aren't as much of a problem if we double\n    // them, so not going to go to as much trouble as loadstart to prevent\n    // that unless we find reason to.\n    var eventsToTrigger = ['loadstart'];\n\n    // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n    eventsToTrigger.push('loadedmetadata');\n\n    // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n    if (el.readyState >= 2) {\n      eventsToTrigger.push('loadeddata');\n    }\n\n    // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n    if (el.readyState >= 3) {\n      eventsToTrigger.push('canplay');\n    }\n\n    // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n    if (el.readyState >= 4) {\n      eventsToTrigger.push('canplaythrough');\n    }\n\n    // We still need to give the player time to add event listeners\n    this.ready(function () {\n      eventsToTrigger.forEach(function (type) {\n        this.trigger(type);\n      }, this);\n    });\n  };\n\n  /**\n   * Set current time for the `HTML5` tech.\n   *\n   * @param {number} seconds\n   *        Set the current time of the media to this.\n   */\n\n\n  Html5.prototype.setCurrentTime = function setCurrentTime(seconds) {\n    try {\n      this.el_.currentTime = seconds;\n    } catch (e) {\n      log(e, 'Video is not ready. (Video.js)');\n      // this.warning(VideoJS.warnings.videoNotReady);\n    }\n  };\n\n  /**\n   * Get the current duration of the HTML5 media element.\n   *\n   * @return {number}\n   *         The duration of the media or 0 if there is no duration.\n   */\n\n\n  Html5.prototype.duration = function duration() {\n    var _this3 = this;\n\n    // Android Chrome will report duration as Infinity for VOD HLS until after\n    // playback has started, which triggers the live display erroneously.\n    // Return NaN if playback has not started and trigger a durationupdate once\n    // the duration can be reliably known.\n    if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n      // Wait for the first `timeupdate` with currentTime > 0 - there may be\n      // several with 0\n      var checkProgress = function checkProgress() {\n        if (_this3.el_.currentTime > 0) {\n          // Trigger durationchange for genuinely live video\n          if (_this3.el_.duration === Infinity) {\n            _this3.trigger('durationchange');\n          }\n          _this3.off('timeupdate', checkProgress);\n        }\n      };\n\n      this.on('timeupdate', checkProgress);\n      return NaN;\n    }\n    return this.el_.duration || NaN;\n  };\n\n  /**\n   * Get the current width of the HTML5 media element.\n   *\n   * @return {number}\n   *         The width of the HTML5 media element.\n   */\n\n\n  Html5.prototype.width = function width() {\n    return this.el_.offsetWidth;\n  };\n\n  /**\n   * Get the current height of the HTML5 media element.\n   *\n   * @return {number}\n   *         The heigth of the HTML5 media element.\n   */\n\n\n  Html5.prototype.height = function height() {\n    return this.el_.offsetHeight;\n  };\n\n  /**\n   * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n   * `fullscreenchange` event.\n   *\n   * @private\n   * @fires fullscreenchange\n   * @listens webkitendfullscreen\n   * @listens webkitbeginfullscreen\n   * @listens webkitbeginfullscreen\n   */\n\n\n  Html5.prototype.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {\n    var _this4 = this;\n\n    if (!('webkitDisplayingFullscreen' in this.el_)) {\n      return;\n    }\n\n    var endFn = function endFn() {\n      this.trigger('fullscreenchange', { isFullscreen: false });\n    };\n\n    var beginFn = function beginFn() {\n      if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n        this.one('webkitendfullscreen', endFn);\n\n        this.trigger('fullscreenchange', { isFullscreen: true });\n      }\n    };\n\n    this.on('webkitbeginfullscreen', beginFn);\n    this.on('dispose', function () {\n      _this4.off('webkitbeginfullscreen', beginFn);\n      _this4.off('webkitendfullscreen', endFn);\n    });\n  };\n\n  /**\n   * Check if fullscreen is supported on the current playback device.\n   *\n   * @return {boolean}\n   *         - True if fullscreen is supported.\n   *         - False if fullscreen is not supported.\n   */\n\n\n  Html5.prototype.supportsFullScreen = function supportsFullScreen() {\n    if (typeof this.el_.webkitEnterFullScreen === 'function') {\n      var userAgent = window.navigator && window.navigator.userAgent || '';\n\n      // Seems to be broken in Chromium/Chrome && Safari in Leopard\n      if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * Request that the `HTML5` Tech enter fullscreen.\n   */\n\n\n  Html5.prototype.enterFullScreen = function enterFullScreen() {\n    var video = this.el_;\n\n    if (video.paused && video.networkState <= video.HAVE_METADATA) {\n      // attempt to prime the video element for programmatic access\n      // this isn't necessary on the desktop but shouldn't hurt\n      this.el_.play();\n\n      // playing and pausing synchronously during the transition to fullscreen\n      // can get iOS ~6.1 devices into a play/pause loop\n      this.setTimeout(function () {\n        video.pause();\n        video.webkitEnterFullScreen();\n      }, 0);\n    } else {\n      video.webkitEnterFullScreen();\n    }\n  };\n\n  /**\n   * Request that the `HTML5` Tech exit fullscreen.\n   */\n\n\n  Html5.prototype.exitFullScreen = function exitFullScreen() {\n    this.el_.webkitExitFullScreen();\n  };\n\n  /**\n   * A getter/setter for the `Html5` Tech's source object.\n   * > Note: Please use {@link Html5#setSource}\n   *\n   * @param {Tech~SourceObject} [src]\n   *        The source object you want to set on the `HTML5` techs element.\n   *\n   * @return {Tech~SourceObject|undefined}\n   *         - The current source object when a source is not passed in.\n   *         - undefined when setting\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  Html5.prototype.src = function src(_src) {\n    if (_src === undefined) {\n      return this.el_.src;\n    }\n\n    // Setting src through `src` instead of `setSrc` will be deprecated\n    this.setSrc(_src);\n  };\n\n  /**\n   * Reset the tech by removing all sources and then calling\n   * {@link Html5.resetMediaElement}.\n   */\n\n\n  Html5.prototype.reset = function reset() {\n    Html5.resetMediaElement(this.el_);\n  };\n\n  /**\n   * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n   * the HTML5 media element.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object from the HTML5 tech. With a fallback to the\n   *         elements source.\n   */\n\n\n  Html5.prototype.currentSrc = function currentSrc() {\n    if (this.currentSource_) {\n      return this.currentSource_.src;\n    }\n    return this.el_.currentSrc;\n  };\n\n  /**\n   * Set controls attribute for the HTML5 media Element.\n   *\n   * @param {string} val\n   *        Value to set the controls attribute to\n   */\n\n\n  Html5.prototype.setControls = function setControls(val) {\n    this.el_.controls = !!val;\n  };\n\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n\n\n  Html5.prototype.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.addTextTrack.call(this, kind, label, language);\n    }\n\n    return this.el_.addTextTrack(kind, label, language);\n  };\n\n  /**\n   * Creates either native TextTrack or an emulated TextTrack depending\n   * on the value of `featuresNativeTextTracks`\n   *\n   * @param {Object} options\n   *        The object should contain the options to intialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @param {boolean} [options.default]\n   *        Default this track to on.\n   *\n   * @param {string} [options.id]\n   *        The internal id to assign this track.\n   *\n   * @param {string} [options.src]\n   *        A source url for the track.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n\n\n  Html5.prototype.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.createRemoteTextTrack.call(this, options);\n    }\n    var htmlTrackElement = document.createElement('track');\n\n    if (options.kind) {\n      htmlTrackElement.kind = options.kind;\n    }\n    if (options.label) {\n      htmlTrackElement.label = options.label;\n    }\n    if (options.language || options.srclang) {\n      htmlTrackElement.srclang = options.language || options.srclang;\n    }\n    if (options['default']) {\n      htmlTrackElement['default'] = options['default'];\n    }\n    if (options.id) {\n      htmlTrackElement.id = options.id;\n    }\n    if (options.src) {\n      htmlTrackElement.src = options.src;\n    }\n\n    return htmlTrackElement;\n  };\n\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * @param {Object} options The object should contain values for\n   * kind, language, label, and src (location of the WebVTT file)\n   * @param {Boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   * automatically removed from the video element whenever the source changes\n   * @return {HTMLTrackElement} An Html Track Element.\n   * This can be an emulated {@link HTMLTrackElement} or a native one.\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   * to \"false\" in upcoming versions of Video.js\n   */\n\n\n  Html5.prototype.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);\n\n    if (this.featuresNativeTextTracks) {\n      this.el().appendChild(htmlTrackElement);\n    }\n\n    return htmlTrackElement;\n  };\n\n  /**\n   * Remove remote `TextTrack` from `TextTrackList` object\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` object to remove\n   */\n\n\n  Html5.prototype.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    _Tech.prototype.removeRemoteTextTrack.call(this, track);\n\n    if (this.featuresNativeTextTracks) {\n      var tracks = this.$$('track');\n\n      var i = tracks.length;\n\n      while (i--) {\n        if (track === tracks[i] || track === tracks[i].track) {\n          this.el().removeChild(tracks[i]);\n        }\n      }\n    }\n  };\n\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   */\n\n\n  Html5.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    if (typeof this.el().getVideoPlaybackQuality === 'function') {\n      return this.el().getVideoPlaybackQuality();\n    }\n\n    var videoPlaybackQuality = {};\n\n    if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n      videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n      videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n    }\n\n    if (window.performance && typeof window.performance.now === 'function') {\n      videoPlaybackQuality.creationTime = window.performance.now();\n    } else if (window.performance && window.performance.timing && typeof window.performance.timing.navigationStart === 'number') {\n      videoPlaybackQuality.creationTime = window.Date.now() - window.performance.timing.navigationStart;\n    }\n\n    return videoPlaybackQuality;\n  };\n\n  return Html5;\n}(Tech);\n\n/* HTML5 Support Testing ---------------------------------------------------- */\n\nif (isReal()) {\n\n  /**\n   * Element for testing browser HTML5 media capabilities\n   *\n   * @type {Element}\n   * @constant\n   * @private\n   */\n  Html5.TEST_VID = document.createElement('video');\n  var track = document.createElement('track');\n\n  track.kind = 'captions';\n  track.srclang = 'en';\n  track.label = 'English';\n  Html5.TEST_VID.appendChild(track);\n}\n\n/**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n *         - True if HTML5 media is supported.\n *         - False if HTML5 media is not supported.\n */\nHtml5.isSupported = function () {\n  // IE9 with no Media Player is a LIAR! (#984)\n  try {\n    Html5.TEST_VID.volume = 0.5;\n  } catch (e) {\n    return false;\n  }\n\n  return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n};\n\n/**\n * Check if the tech can support the given type\n *\n * @param {string} type\n *        The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\nHtml5.canPlayType = function (type) {\n  return Html5.TEST_VID.canPlayType(type);\n};\n\n/**\n * Check if the tech can support the given source\n * @param {Object} srcObj\n *        The source object\n * @param {Object} options\n *        The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\nHtml5.canPlaySource = function (srcObj, options) {\n  return Html5.canPlayType(srcObj.type);\n};\n\n/**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n *         - True if volume can be controlled\n *         - False otherwise\n */\nHtml5.canControlVolume = function () {\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var volume = Html5.TEST_VID.volume;\n\n    Html5.TEST_VID.volume = volume / 2 + 0.1;\n    return volume !== Html5.TEST_VID.volume;\n  } catch (e) {\n    return false;\n  }\n};\n\n/**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {bolean}\n *      - True if volume can be muted\n *      - False otherwise\n */\nHtml5.canMuteVolume = function () {\n  try {\n    var muted = Html5.TEST_VID.muted;\n\n    // in some versions of iOS muted property doesn't always\n    // work, so we want to set both property and attribute\n    Html5.TEST_VID.muted = !muted;\n    if (Html5.TEST_VID.muted) {\n      setAttribute(Html5.TEST_VID, 'muted', 'muted');\n    } else {\n      removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n    }\n    return muted !== Html5.TEST_VID.muted;\n  } catch (e) {\n    return false;\n  }\n};\n\n/**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n *         - True if playback rate can be controlled\n *         - False otherwise\n */\nHtml5.canControlPlaybackRate = function () {\n  // Playback rate API is implemented in Android Chrome, but doesn't do anything\n  // https://github.com/videojs/video.js/issues/3180\n  if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n    return false;\n  }\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var playbackRate = Html5.TEST_VID.playbackRate;\n\n    Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n    return playbackRate !== Html5.TEST_VID.playbackRate;\n  } catch (e) {\n    return false;\n  }\n};\n\n/**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n *         - True if builtin attributes can be overriden\n *         - False otherwise\n */\nHtml5.canOverrideAttributes = function () {\n  if (IS_IE8) {\n    return false;\n  }\n  // if we cannot overwrite the src/innerHTML property, there is no support\n  // iOS 7 safari for instance cannot do this.\n  try {\n    var noop = function noop() {};\n\n    Object.defineProperty(document.createElement('video'), 'src', { get: noop, set: noop });\n    Object.defineProperty(document.createElement('audio'), 'src', { get: noop, set: noop });\n    Object.defineProperty(document.createElement('video'), 'innerHTML', { get: noop, set: noop });\n    Object.defineProperty(document.createElement('audio'), 'innerHTML', { get: noop, set: noop });\n  } catch (e) {\n    return false;\n  }\n\n  return true;\n};\n\n/**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n *         - True if native `TextTrack`s are supported.\n *         - False otherwise\n */\nHtml5.supportsNativeTextTracks = function () {\n  return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n};\n\n/**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `VideoTrack`s are supported.\n *        - False otherwise\n */\nHtml5.supportsNativeVideoTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n};\n\n/**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `AudioTrack`s are supported.\n *        - False otherwise\n */\nHtml5.supportsNativeAudioTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n};\n\n/**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\nHtml5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\nHtml5.prototype.featuresVolumeControl = Html5.canControlVolume();\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default {@link Html5.canMuteVolume}\n */\nHtml5.prototype.featuresMuteControl = Html5.canMuteVolume();\n\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\nHtml5.prototype.featuresPlaybackRate = Html5.canControlPlaybackRate();\n\n/**\n * Boolean indicating wether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.featuresSourceset = Html5.canOverrideAttributes();\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.movingMediaElementInDOM = !IS_IOS;\n\n// TODO: Previous comment: No longer appears to be used. Can probably be removed.\n//       Is this true?\n/**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.featuresFullscreenResize = true;\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggred instead.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.featuresProgressEvents = true;\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggred instead.\n *\n * @default\n */\nHtml5.prototype.featuresTimeupdateEvents = true;\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\nHtml5.prototype.featuresNativeTextTracks = Html5.supportsNativeTextTracks();\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\nHtml5.prototype.featuresNativeVideoTracks = Html5.supportsNativeVideoTracks();\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\nHtml5.prototype.featuresNativeAudioTracks = Html5.supportsNativeAudioTracks();\n\n// HTML5 Feature detection and Device Fixes --------------------------------- //\nvar canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;\nvar mpegurlRE = /^application\\/(?:x-|vnd\\.apple\\.)mpegurl/i;\nvar mp4RE = /^video\\/mp4/i;\n\nHtml5.patchCanPlayType = function () {\n\n  // Android 4.0 and above can play HLS to some extent but it reports being unable to do so\n  // Firefox and Chrome report correctly\n  if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      if (type && mpegurlRE.test(type)) {\n        return 'maybe';\n      }\n      return canPlayType.call(this, type);\n    };\n\n    // Override Android 2.2 and less canPlayType method which is broken\n  } else if (IS_OLD_ANDROID) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      if (type && mp4RE.test(type)) {\n        return 'maybe';\n      }\n      return canPlayType.call(this, type);\n    };\n  }\n};\n\nHtml5.unpatchCanPlayType = function () {\n  var r = Html5.TEST_VID.constructor.prototype.canPlayType;\n\n  Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;\n  return r;\n};\n\n// by default, patch the media element\nHtml5.patchCanPlayType();\n\nHtml5.disposeMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  if (el.parentNode) {\n    el.parentNode.removeChild(el);\n  }\n\n  // remove any child track or source nodes to prevent their loading\n  while (el.hasChildNodes()) {\n    el.removeChild(el.firstChild);\n  }\n\n  // remove any src reference. not setting `src=''` because that causes a warning\n  // in firefox\n  el.removeAttribute('src');\n\n  // force the media element to update its loading state by calling load()\n  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {\n        // not supported\n      }\n    })();\n  }\n};\n\nHtml5.resetMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  var sources = el.querySelectorAll('source');\n  var i = sources.length;\n\n  while (i--) {\n    el.removeChild(sources[i]);\n  }\n\n  // remove any src reference.\n  // not setting `src=''` because that throws an error\n  el.removeAttribute('src');\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {\n        // satisfy linter\n      }\n    })();\n  }\n};\n\n/* Native HTML5 element property wrapping ----------------------------------- */\n// Wrap native boolean attributes with getters that check both property and attribute\n// The list is as followed:\n// muted, defaultMuted, autoplay, controls, loop, playsinline\n[\n/**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n *         - True if the value of `volume` should be ignored and the audio set to silent.\n *         - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n\n/**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n *         - The value of `defaultMuted` from the media element.\n *         - True indicates that the media should start muted.\n *         - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n\n/**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n *         - The value of `autoplay` from the media element.\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n\n/**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n *         - The value of `controls` from the media element.\n *         - True indicates that native controls should be showing.\n *         - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n'controls',\n\n/**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n *         - The value of `loop` from the media element.\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n\n/**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n *         - The value of `playsinline` from the media element.\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop] || this.el_.hasAttribute(prop);\n  };\n});\n\n// Wrap native boolean attributes with setters that set both property and attribute\n// The list is as followed:\n// setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n// setControls is special-cased above\n[\n/**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n\n/**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on intial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n\n/**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n\n/**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n\n/**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase(prop)] = function (v) {\n    this.el_[prop] = v;\n\n    if (v) {\n      this.el_.setAttribute(prop, prop);\n    } else {\n      this.el_.removeAttribute(prop);\n    }\n  };\n});\n\n// Wrap native properties with a getter\n// The list is as followed\n// paused, currentTime, buffered, volume, poster, preload, error, seeking\n// seekable, ended, playbackRate, defaultPlaybackRate, played, networkState\n// readyState, videoWidth, videoHeight\n[\n/**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n *         The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n'paused',\n\n/**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n *         The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n'currentTime',\n\n/**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n *         The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n'buffered',\n\n/**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n *         The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n\n/**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n *         The value of `poster` from the media element. Value will be a url to an\n *         image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n'poster',\n\n/**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#preload\n * @return {string}\n *         The value of `preload` from the media element. Will be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n\n/**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occured during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n *         The value of `error` from the media element. Will be `MediaError` if there\n *         is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n'error',\n\n/**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n *         - The value of `seeking` from the media element.\n *         - True indicates that the media is currently seeking to a new position.\n *         - Flase indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n'seeking',\n\n/**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n *         The value of `seekable` from the media element. A `TimeRange` object\n *         indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n'seekable',\n\n/**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n *         - The value of `ended` from the media element.\n *         - True indicates that the media has ended.\n *         - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n'ended',\n\n/**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n\n/**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n *   - if defaultPlaybackRate is set to 2, media will play twice as fast.\n *   - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'defaultPlaybackRate',\n\n/**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n *         The value of `played` from the media element. A `TimeRange` object indicating\n *         the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n'played',\n\n/**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NEWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n *         The value of `networkState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n'networkState',\n\n/**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n *         The value of `readyState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n'readyState',\n\n/**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n *         The value of `videoWidth` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoWidth',\n\n/**\n * Get the value of `videoHeight` from the video element. `videoHeigth` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n *         The value of `videoHeight` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoHeight'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop];\n  };\n});\n\n// Wrap native properties with a setter in this format:\n// set + toTitleCase(name)\n// The list is as follows:\n// setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate\n[\n/**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n *        The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n\n/**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n *        The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n'src',\n\n/**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n *        The url to an image that should be used as the `poster` for the media\n *        element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n'poster',\n\n/**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n *         The value of `preload` to set on the media element. Must be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n\n/**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n\n/**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n'defaultPlaybackRate'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase(prop)] = function (v) {\n    this.el_[prop] = v;\n  };\n});\n\n// wrap native functions with a function\n// The list is as follows:\n// pause, load play\n[\n/**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n'pause',\n\n/**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n'load',\n\n/**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n'play'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop]();\n  };\n});\n\nTech.withSourceHandlers(Html5);\n\n/**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @proprety {Tech~SourceObject} source\n *        The source object\n *\n * @proprety {Html5} tech\n *        The instance of the HTML5 tech.\n */\nHtml5.nativeSourceHandler = {};\n\n/**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n *        The mimetype to check\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string)\n */\nHtml5.nativeSourceHandler.canPlayType = function (type) {\n  // IE9 on Windows 7 without MediaPlayer throws an error here\n  // https://github.com/videojs/video.js/issues/519\n  try {\n    return Html5.TEST_VID.canPlayType(type);\n  } catch (e) {\n    return '';\n  }\n};\n\n/**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n *         The source object\n *\n * @param {Object} [options]\n *         Options to be passed to the tech.\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string).\n */\nHtml5.nativeSourceHandler.canHandleSource = function (source, options) {\n\n  // If a type was provided we should rely on that\n  if (source.type) {\n    return Html5.nativeSourceHandler.canPlayType(source.type);\n\n    // If no type, fall back to checking 'video/[EXTENSION]'\n  } else if (source.src) {\n    var ext = getFileExtension(source.src);\n\n    return Html5.nativeSourceHandler.canPlayType('video/' + ext);\n  }\n\n  return '';\n};\n\n/**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n *        The source object\n *\n * @param {Html5} tech\n *        The instance of the Html5 tech\n *\n * @param {Object} [options]\n *        The options to pass to the source\n */\nHtml5.nativeSourceHandler.handleSource = function (source, tech, options) {\n  tech.setSrc(source.src);\n};\n\n/**\n * A noop for the native dispose function, as cleanup is not needed.\n */\nHtml5.nativeSourceHandler.dispose = function () {};\n\n// Register the native source handler\nHtml5.registerSourceHandler(Html5.nativeSourceHandler);\n\nTech.registerTech('Html5', Html5);\n\nvar _templateObject$1 = taggedTemplateLiteralLoose(['\\n        Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n        See https://github.com/videojs/video.js/issues/2617 for more info.\\n      '], ['\\n        Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n        See https://github.com/videojs/video.js/issues/2617 for more info.\\n      ']);\n\n/**\n * @file player.js\n */\n// Subclasses Component\n// The following imports are used only to ensure that the corresponding modules\n// are always included in the video.js package. Importing the modules will\n// execute them and they will register themselves with video.js.\n// Import Html5 tech, at least for disposing the original video tag.\n// The following tech events are simply re-triggered\n// on the player when they happen\nvar TECH_EVENTS_RETRIGGER = [\n/**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n'progress',\n\n/**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n'abort',\n\n/**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n'suspend',\n\n/**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n'emptied',\n/**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n'stalled',\n\n/**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n'loadedmetadata',\n\n/**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n/**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n'loadeddata',\n\n/**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n/**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n'timeupdate',\n\n/**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n/**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n'resize',\n\n/**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n/**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n'volumechange',\n\n/**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n/**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n'texttrackchange'];\n\n// events to queue when playback rate is zero\n// this is a hash for the sole purpose of mapping non-camel-cased event names\n// to camel-cased function names\nvar TECH_EVENTS_QUEUE = {\n  canplay: 'CanPlay',\n  canplaythrough: 'CanPlayThrough',\n  playing: 'Playing',\n  seeked: 'Seeked'\n};\n\nvar BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\n\nvar BREAKPOINT_CLASSES = {};\n\n// grep: vjs-layout-tiny\n// grep: vjs-layout-x-small\n// grep: vjs-layout-small\n// grep: vjs-layout-medium\n// grep: vjs-layout-large\n// grep: vjs-layout-x-large\n// grep: vjs-layout-huge\nBREAKPOINT_ORDER.forEach(function (k) {\n  var v = k.charAt(0) === 'x' ? 'x-' + k.substring(1) : k;\n\n  BREAKPOINT_CLASSES[k] = 'vjs-layout-' + v;\n});\n\nvar DEFAULT_BREAKPOINTS = {\n  tiny: 210,\n  xsmall: 320,\n  small: 425,\n  medium: 768,\n  large: 1440,\n  xlarge: 2560,\n  huge: Infinity\n};\n\n/**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in two ways:\n * 1. By calling `videojs('example_video_1');`\n * 2. By using it directly via  `videojs.players.example_video_1;`\n *\n * @extends Component\n */\n\nvar Player = function (_Component) {\n  inherits(Player, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Element} tag\n   *        The original video DOM element used for configuring options.\n   *\n   * @param {Object} [options]\n   *        Object of option names and values.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Ready callback function.\n   */\n  function Player(tag, options, ready) {\n    classCallCheck(this, Player);\n\n    // Make sure tag ID exists\n    tag.id = tag.id || options.id || 'vjs_video_' + newGUID();\n\n    // Set Options\n    // The options argument overrides options set in the video tag\n    // which overrides globally set options.\n    // This latter part coincides with the load order\n    // (tag must exist before Player)\n    options = assign(Player.getTagSettings(tag), options);\n\n    // Delay the initialization of children because we need to set up\n    // player properties first, and can't use `this` before `super()`\n    options.initChildren = false;\n\n    // Same with creating the element\n    options.createEl = false;\n\n    // don't auto mixin the evented mixin\n    options.evented = false;\n\n    // we don't want the player to report touch activity on itself\n    // see enableTouchActivity in Component\n    options.reportTouchActivity = false;\n\n    // If language is not set, get the closest lang attribute\n    if (!options.language) {\n      if (typeof tag.closest === 'function') {\n        var closest = tag.closest('[lang]');\n\n        if (closest && closest.getAttribute) {\n          options.language = closest.getAttribute('lang');\n        }\n      } else {\n        var element = tag;\n\n        while (element && element.nodeType === 1) {\n          if (getAttributes(element).hasOwnProperty('lang')) {\n            options.language = element.getAttribute('lang');\n            break;\n          }\n          element = element.parentNode;\n        }\n      }\n    }\n\n    // Run base component initializing with new options\n\n    // create logger\n    var _this = possibleConstructorReturn(this, _Component.call(this, null, options, ready));\n\n    _this.log = createLogger(_this.id_);\n\n    // Tracks when a tech changes the poster\n    _this.isPosterFromTech_ = false;\n\n    // Holds callback info that gets queued when playback rate is zero\n    // and a seek is happening\n    _this.queuedCallbacks_ = [];\n\n    // Turn off API access because we're loading a new tech that might load asynchronously\n    _this.isReady_ = false;\n\n    // Init state hasStarted_\n    _this.hasStarted_ = false;\n\n    // Init state userActive_\n    _this.userActive_ = false;\n\n    // if the global option object was accidentally blown away by\n    // someone, bail early with an informative error\n    if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {\n      throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n    }\n\n    // Store the original tag used to set options\n    _this.tag = tag;\n\n    // Store the tag attributes used to restore html5 element\n    _this.tagAttributes = tag && getAttributes(tag);\n\n    // Update current language\n    _this.language(_this.options_.language);\n\n    // Update Supported Languages\n    if (options.languages) {\n      // Normalise player option languages to lowercase\n      var languagesToLower = {};\n\n      Object.getOwnPropertyNames(options.languages).forEach(function (name$$1) {\n        languagesToLower[name$$1.toLowerCase()] = options.languages[name$$1];\n      });\n      _this.languages_ = languagesToLower;\n    } else {\n      _this.languages_ = Player.prototype.options_.languages;\n    }\n\n    // Cache for video property values.\n    _this.cache_ = {};\n\n    // Set poster\n    _this.poster_ = options.poster || '';\n\n    // Set controls\n    _this.controls_ = !!options.controls;\n\n    // Set default values for lastVolume\n    _this.cache_.lastVolume = 1;\n\n    // Original tag settings stored in options\n    // now remove immediately so native controls don't flash.\n    // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n    tag.controls = false;\n    tag.removeAttribute('controls');\n\n    // the attribute overrides the option\n    if (tag.hasAttribute('autoplay')) {\n      _this.options_.autoplay = true;\n    } else {\n      // otherwise use the setter to validate and\n      // set the correct value.\n      _this.autoplay(_this.options_.autoplay);\n    }\n\n    /*\n     * Store the internal state of scrubbing\n     *\n     * @private\n     * @return {Boolean} True if the user is scrubbing\n     */\n    _this.scrubbing_ = false;\n\n    _this.el_ = _this.createEl();\n\n    // Set default value for lastPlaybackRate\n    _this.cache_.lastPlaybackRate = _this.defaultPlaybackRate();\n\n    // Make this an evented object and use `el_` as its event bus.\n    evented(_this, { eventBusKey: 'el_' });\n\n    // We also want to pass the original player options to each component and plugin\n    // as well so they don't need to reach back into the player for options later.\n    // We also need to do another copy of this.options_ so we don't end up with\n    // an infinite loop.\n    var playerOptionsCopy = mergeOptions(_this.options_);\n\n    // Load plugins\n    if (options.plugins) {\n      var plugins = options.plugins;\n\n      Object.keys(plugins).forEach(function (name$$1) {\n        if (typeof this[name$$1] === 'function') {\n          this[name$$1](plugins[name$$1]);\n        } else {\n          throw new Error('plugin \"' + name$$1 + '\" does not exist');\n        }\n      }, _this);\n    }\n\n    _this.options_.playerOptions = playerOptionsCopy;\n\n    _this.middleware_ = [];\n\n    _this.initChildren();\n\n    // Set isAudio based on whether or not an audio tag was used\n    _this.isAudio(tag.nodeName.toLowerCase() === 'audio');\n\n    // Update controls className. Can't do this when the controls are initially\n    // set because the element doesn't exist yet.\n    if (_this.controls()) {\n      _this.addClass('vjs-controls-enabled');\n    } else {\n      _this.addClass('vjs-controls-disabled');\n    }\n\n    // Set ARIA label and region role depending on player type\n    _this.el_.setAttribute('role', 'region');\n    if (_this.isAudio()) {\n      _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));\n    } else {\n      _this.el_.setAttribute('aria-label', _this.localize('Video Player'));\n    }\n\n    if (_this.isAudio()) {\n      _this.addClass('vjs-audio');\n    }\n\n    if (_this.flexNotSupported_()) {\n      _this.addClass('vjs-no-flex');\n    }\n\n    // TODO: Make this smarter. Toggle user state between touching/mousing\n    // using events, since devices can have both touch and mouse events.\n    // if (browser.TOUCH_ENABLED) {\n    //   this.addClass('vjs-touch-enabled');\n    // }\n\n    // iOS Safari has broken hover handling\n    if (!IS_IOS) {\n      _this.addClass('vjs-workinghover');\n    }\n\n    // Make player easily findable by ID\n    Player.players[_this.id_] = _this;\n\n    // Add a major version class to aid css in plugins\n    var majorVersion = version.split('.')[0];\n\n    _this.addClass('vjs-v' + majorVersion);\n\n    // When the player is first initialized, trigger activity so components\n    // like the control bar show themselves if needed\n    _this.userActive(true);\n    _this.reportUserActivity();\n\n    _this.one('play', _this.listenForUserActivity_);\n    _this.on('fullscreenchange', _this.handleFullscreenChange_);\n    _this.on('stageclick', _this.handleStageClick_);\n\n    _this.breakpoints(_this.options_.breakpoints);\n    _this.responsive(_this.options_.responsive);\n\n    _this.changingSrc_ = false;\n    _this.playWaitingForReady_ = false;\n    _this.playOnLoadstart_ = null;\n    return _this;\n  }\n\n  /**\n   * Destroys the video player and does any necessary cleanup.\n   *\n   * This is especially helpful if you are dynamically adding and removing videos\n   * to/from the DOM.\n   *\n   * @fires Player#dispose\n   */\n\n\n  Player.prototype.dispose = function dispose() {\n    /**\n     * Called when the player is being disposed of.\n     *\n     * @event Player#dispose\n     * @type {EventTarget~Event}\n     */\n    this.trigger('dispose');\n    // prevent dispose from being called twice\n    this.off('dispose');\n\n    if (this.styleEl_ && this.styleEl_.parentNode) {\n      this.styleEl_.parentNode.removeChild(this.styleEl_);\n      this.styleEl_ = null;\n    }\n\n    // Kill reference to this player\n    Player.players[this.id_] = null;\n\n    if (this.tag && this.tag.player) {\n      this.tag.player = null;\n    }\n\n    if (this.el_ && this.el_.player) {\n      this.el_.player = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.dispose();\n      this.isPosterFromTech_ = false;\n      this.poster_ = '';\n    }\n\n    if (this.playerElIngest_) {\n      this.playerElIngest_ = null;\n    }\n\n    if (this.tag) {\n      this.tag = null;\n    }\n\n    clearCacheForPlayer(this);\n\n    // the actual .el_ is removed here\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create the `Player`'s DOM element.\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  Player.prototype.createEl = function createEl$$1() {\n    var tag = this.tag;\n    var el = void 0;\n    var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n    var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n\n    if (playerElIngest) {\n      el = this.el_ = tag.parentNode;\n    } else if (!divEmbed) {\n      el = this.el_ = _Component.prototype.createEl.call(this, 'div');\n    }\n\n    // Copy over all the attributes from the tag, including ID and class\n    // ID will now reference player box, not the video tag\n    var attrs = getAttributes(tag);\n\n    if (divEmbed) {\n      el = this.el_ = tag;\n      tag = this.tag = document.createElement('video');\n      while (el.children.length) {\n        tag.appendChild(el.firstChild);\n      }\n\n      if (!hasClass(el, 'video-js')) {\n        addClass(el, 'video-js');\n      }\n\n      el.appendChild(tag);\n\n      playerElIngest = this.playerElIngest_ = el;\n\n      // copy over properties from the video-js element\n      // ie8 doesn't support Object.keys nor hasOwnProperty\n      // on dom elements so we have to specify properties individually\n      ['autoplay', 'controls', 'crossOrigin', 'defaultMuted', 'defaultPlaybackRate', 'loop', 'muted', 'playbackRate', 'src', 'volume'].forEach(function (prop) {\n        if (typeof el[prop] !== 'undefined') {\n          tag[prop] = el[prop];\n        }\n      });\n    }\n\n    // set tabindex to -1 to remove the video element from the focus order\n    tag.setAttribute('tabindex', '-1');\n    attrs.tabindex = '-1';\n\n    // Workaround for #4583 (JAWS+IE doesn't announce BPB or play button)\n    // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n    // Note that we can't detect if JAWS is being used, but this ARIA attribute\n    //  doesn't change behavior of IE11 if JAWS is not being used\n    if (IE_VERSION) {\n      tag.setAttribute('role', 'application');\n      attrs.role = 'application';\n    }\n\n    // Remove width/height attrs from tag so CSS can make it 100% width/height\n    tag.removeAttribute('width');\n    tag.removeAttribute('height');\n\n    if ('width' in attrs) {\n      delete attrs.width;\n    }\n    if ('height' in attrs) {\n      delete attrs.height;\n    }\n\n    Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n      // workaround so we don't totally break IE7\n      // http://stackoverflow.com/questions/3653444/css-styles-not-applied-on-dynamic-elements-in-internet-explorer-7\n      if (attr === 'class') {\n        el.className += ' ' + attrs[attr];\n\n        if (divEmbed) {\n          tag.className += ' ' + attrs[attr];\n        }\n      } else {\n        el.setAttribute(attr, attrs[attr]);\n\n        if (divEmbed) {\n          tag.setAttribute(attr, attrs[attr]);\n        }\n      }\n    });\n\n    // Update tag id/class for use as HTML5 playback tech\n    // Might think we should do this after embedding in container so .vjs-tech class\n    // doesn't flash 100% width/height, but class only applies with .video-js parent\n    tag.playerId = tag.id;\n    tag.id += '_html5_api';\n    tag.className = 'vjs-tech';\n\n    // Make player findable on elements\n    tag.player = el.player = this;\n    // Default state of video is paused\n    this.addClass('vjs-paused');\n\n    // Add a style element in the player that we'll use to set the width/height\n    // of the player in a way that's still overrideable by CSS, just like the\n    // video element\n    if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n      this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n      var defaultsStyleEl = $('.vjs-styles-defaults');\n      var head = $('head');\n\n      head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n    }\n\n    this.fill_ = false;\n    this.fluid_ = false;\n\n    // Pass in the width/height/aspectRatio options which will update the style el\n    this.width(this.options_.width);\n    this.height(this.options_.height);\n    this.fill(this.options_.fill);\n    this.fluid(this.options_.fluid);\n    this.aspectRatio(this.options_.aspectRatio);\n\n    // Hide any links within the video/audio tag, because IE doesn't hide them completely.\n    var links = tag.getElementsByTagName('a');\n\n    for (var i = 0; i < links.length; i++) {\n      var linkEl = links.item(i);\n\n      addClass(linkEl, 'vjs-hidden');\n      linkEl.setAttribute('hidden', 'hidden');\n    }\n\n    // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n    // keep track of the original for later so we can know if the source originally failed\n    tag.initNetworkState_ = tag.networkState;\n\n    // Wrap video tag in div (el/box) container\n    if (tag.parentNode && !playerElIngest) {\n      tag.parentNode.insertBefore(el, tag);\n    }\n\n    // insert the tag as the first child of the player element\n    // then manually add it to the children array so that this.addChild\n    // will work properly for other components\n    //\n    // Breaks iPhone, fixed in HTML5 setup.\n    prependTo(tag, el);\n    this.children_.unshift(tag);\n\n    // Set lang attr on player to ensure CSS :lang() in consistent with player\n    // if it's been set to something different to the doc\n    this.el_.setAttribute('lang', this.language_);\n\n    this.el_ = el;\n\n    return el;\n  };\n\n  /**\n   * A getter/setter for the `Player`'s width. Returns the player's configured value.\n   * To get the current width use `currentWidth()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s width to.\n   *\n   * @return {number}\n   *         The current width of the `Player` when getting.\n   */\n\n\n  Player.prototype.width = function width(value) {\n    return this.dimension('width', value);\n  };\n\n  /**\n   * A getter/setter for the `Player`'s height. Returns the player's configured value.\n   * To get the current height use `currentheight()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s heigth to.\n   *\n   * @return {number}\n   *         The current height of the `Player` when getting.\n   */\n\n\n  Player.prototype.height = function height(value) {\n    return this.dimension('height', value);\n  };\n\n  /**\n   * A getter/setter for the `Player`'s width & height.\n   *\n   * @param {string} dimension\n   *        This string can be:\n   *        - 'width'\n   *        - 'height'\n   *\n   * @param {number} [value]\n   *        Value for dimension specified in the first argument.\n   *\n   * @return {number}\n   *         The dimension arguments value when getting (width/height).\n   */\n\n\n  Player.prototype.dimension = function dimension(_dimension, value) {\n    var privDimension = _dimension + '_';\n\n    if (value === undefined) {\n      return this[privDimension] || 0;\n    }\n\n    if (value === '') {\n      // If an empty string is given, reset the dimension to be automatic\n      this[privDimension] = undefined;\n      this.updateStyleEl_();\n      return;\n    }\n\n    var parsedVal = parseFloat(value);\n\n    if (isNaN(parsedVal)) {\n      log.error('Improper value \"' + value + '\" supplied for for ' + _dimension);\n      return;\n    }\n\n    this[privDimension] = parsedVal;\n    this.updateStyleEl_();\n  };\n\n  /**\n   * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n   *\n   * Turning this on will turn off fill mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n\n\n  Player.prototype.fluid = function fluid(bool) {\n    if (bool === undefined) {\n      return !!this.fluid_;\n    }\n\n    this.fluid_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fluid');\n      this.fill(false);\n    } else {\n      this.removeClass('vjs-fluid');\n    }\n\n    this.updateStyleEl_();\n  };\n\n  /**\n   * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n   *\n   * Turning this on will turn off fluid mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n\n\n  Player.prototype.fill = function fill(bool) {\n    if (bool === undefined) {\n      return !!this.fill_;\n    }\n\n    this.fill_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fill');\n      this.fluid(false);\n    } else {\n      this.removeClass('vjs-fill');\n    }\n  };\n\n  /**\n   * Get/Set the aspect ratio\n   *\n   * @param {string} [ratio]\n   *        Aspect ratio for player\n   *\n   * @return {string|undefined}\n   *         returns the current aspect ratio when getting\n   */\n\n  /**\n   * A getter/setter for the `Player`'s aspect ratio.\n   *\n   * @param {string} [ratio]\n   *        The value to set the `Player's aspect ratio to.\n   *\n   * @return {string|undefined}\n   *         - The current aspect ratio of the `Player` when getting.\n   *         - undefined when setting\n   */\n\n\n  Player.prototype.aspectRatio = function aspectRatio(ratio) {\n    if (ratio === undefined) {\n      return this.aspectRatio_;\n    }\n\n    // Check for width:height format\n    if (!/^\\d+\\:\\d+$/.test(ratio)) {\n      throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n    }\n    this.aspectRatio_ = ratio;\n\n    // We're assuming if you set an aspect ratio you want fluid mode,\n    // because in fixed mode you could calculate width and height yourself.\n    this.fluid(true);\n\n    this.updateStyleEl_();\n  };\n\n  /**\n   * Update styles of the `Player` element (height, width and aspect ratio).\n   *\n   * @private\n   * @listens Tech#loadedmetadata\n   */\n\n\n  Player.prototype.updateStyleEl_ = function updateStyleEl_() {\n    if (window.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n      var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n      var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n      var techEl = this.tech_ && this.tech_.el();\n\n      if (techEl) {\n        if (_width >= 0) {\n          techEl.width = _width;\n        }\n        if (_height >= 0) {\n          techEl.height = _height;\n        }\n      }\n\n      return;\n    }\n\n    var width = void 0;\n    var height = void 0;\n    var aspectRatio = void 0;\n    var idClass = void 0;\n\n    // The aspect ratio is either used directly or to calculate width and height.\n    if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n      // Use any aspectRatio that's been specifically set\n      aspectRatio = this.aspectRatio_;\n    } else if (this.videoWidth() > 0) {\n      // Otherwise try to get the aspect ratio from the video metadata\n      aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n    } else {\n      // Or use a default. The video element's is 2:1, but 16:9 is more common.\n      aspectRatio = '16:9';\n    }\n\n    // Get the ratio as a decimal we can use to calculate dimensions\n    var ratioParts = aspectRatio.split(':');\n    var ratioMultiplier = ratioParts[1] / ratioParts[0];\n\n    if (this.width_ !== undefined) {\n      // Use any width that's been specifically set\n      width = this.width_;\n    } else if (this.height_ !== undefined) {\n      // Or calulate the width from the aspect ratio if a height has been set\n      width = this.height_ / ratioMultiplier;\n    } else {\n      // Or use the video's metadata, or use the video el's default of 300\n      width = this.videoWidth() || 300;\n    }\n\n    if (this.height_ !== undefined) {\n      // Use any height that's been specifically set\n      height = this.height_;\n    } else {\n      // Otherwise calculate the height from the ratio and the width\n      height = width * ratioMultiplier;\n    }\n\n    // Ensure the CSS class is valid by starting with an alpha character\n    if (/^[^a-zA-Z]/.test(this.id())) {\n      idClass = 'dimensions-' + this.id();\n    } else {\n      idClass = this.id() + '-dimensions';\n    }\n\n    // Ensure the right class is still on the player for the style element\n    this.addClass(idClass);\n\n    setTextContent(this.styleEl_, '\\n      .' + idClass + ' {\\n        width: ' + width + 'px;\\n        height: ' + height + 'px;\\n      }\\n\\n      .' + idClass + '.vjs-fluid {\\n        padding-top: ' + ratioMultiplier * 100 + '%;\\n      }\\n    ');\n  };\n\n  /**\n   * Load/Create an instance of playback {@link Tech} including element\n   * and API methods. Then append the `Tech` element in `Player` as a child.\n   *\n   * @param {string} techName\n   *        name of the playback technology\n   *\n   * @param {string} source\n   *        video source\n   *\n   * @private\n   */\n\n\n  Player.prototype.loadTech_ = function loadTech_(techName, source) {\n    var _this2 = this;\n\n    // Pause and remove current playback technology\n    if (this.tech_) {\n      this.unloadTech_();\n    }\n\n    var titleTechName = toTitleCase(techName);\n    var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1);\n\n    // get rid of the HTML5 video tag as soon as we are using another tech\n    if (titleTechName !== 'Html5' && this.tag) {\n      Tech.getTech('Html5').disposeMediaElement(this.tag);\n      this.tag.player = null;\n      this.tag = null;\n    }\n\n    this.techName_ = titleTechName;\n\n    // Turn off API access because we're loading a new tech that might load asynchronously\n    this.isReady_ = false;\n\n    // if autoplay is a string we pass false to the tech\n    // because the player is going to handle autoplay on `loadstart`\n    var autoplay = typeof this.autoplay() === 'string' ? false : this.autoplay();\n\n    // Grab tech-specific options from player options and add source and parent element to use.\n    var techOptions = {\n      source: source,\n      autoplay: autoplay,\n      'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n      'playerId': this.id(),\n      'techId': this.id() + '_' + camelTechName + '_api',\n      'playsinline': this.options_.playsinline,\n      'preload': this.options_.preload,\n      'loop': this.options_.loop,\n      'muted': this.options_.muted,\n      'poster': this.poster(),\n      'language': this.language(),\n      'playerElIngest': this.playerElIngest_ || false,\n      'vtt.js': this.options_['vtt.js'],\n      'canOverridePoster': !!this.options_.techCanOverridePoster,\n      'enableSourceset': this.options_.enableSourceset\n    };\n\n    ALL.names.forEach(function (name$$1) {\n      var props = ALL[name$$1];\n\n      techOptions[props.getterName] = _this2[props.privateName];\n    });\n\n    assign(techOptions, this.options_[titleTechName]);\n    assign(techOptions, this.options_[camelTechName]);\n    assign(techOptions, this.options_[techName.toLowerCase()]);\n\n    if (this.tag) {\n      techOptions.tag = this.tag;\n    }\n\n    if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n      techOptions.startTime = this.cache_.currentTime;\n    }\n\n    // Initialize tech instance\n    var TechClass = Tech.getTech(techName);\n\n    if (!TechClass) {\n      throw new Error('No Tech named \\'' + titleTechName + '\\' exists! \\'' + titleTechName + '\\' should be registered using videojs.registerTech()\\'');\n    }\n\n    this.tech_ = new TechClass(techOptions);\n\n    // player.triggerReady is always async, so don't need this to be async\n    this.tech_.ready(bind(this, this.handleTechReady_), true);\n\n    textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_);\n\n    // Listen to all HTML5-defined events and trigger them on the player\n    TECH_EVENTS_RETRIGGER.forEach(function (event) {\n      _this2.on(_this2.tech_, event, _this2['handleTech' + toTitleCase(event) + '_']);\n    });\n\n    Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {\n      _this2.on(_this2.tech_, event, function (eventObj) {\n        if (_this2.tech_.playbackRate() === 0 && _this2.tech_.seeking()) {\n          _this2.queuedCallbacks_.push({\n            callback: _this2['handleTech' + TECH_EVENTS_QUEUE[event] + '_'].bind(_this2),\n            event: eventObj\n          });\n          return;\n        }\n        _this2['handleTech' + TECH_EVENTS_QUEUE[event] + '_'](eventObj);\n      });\n    });\n\n    this.on(this.tech_, 'loadstart', this.handleTechLoadStart_);\n    this.on(this.tech_, 'sourceset', this.handleTechSourceset_);\n    this.on(this.tech_, 'waiting', this.handleTechWaiting_);\n    this.on(this.tech_, 'ended', this.handleTechEnded_);\n    this.on(this.tech_, 'seeking', this.handleTechSeeking_);\n    this.on(this.tech_, 'play', this.handleTechPlay_);\n    this.on(this.tech_, 'firstplay', this.handleTechFirstPlay_);\n    this.on(this.tech_, 'pause', this.handleTechPause_);\n    this.on(this.tech_, 'durationchange', this.handleTechDurationChange_);\n    this.on(this.tech_, 'fullscreenchange', this.handleTechFullscreenChange_);\n    this.on(this.tech_, 'error', this.handleTechError_);\n    this.on(this.tech_, 'loadedmetadata', this.updateStyleEl_);\n    this.on(this.tech_, 'posterchange', this.handleTechPosterChange_);\n    this.on(this.tech_, 'textdata', this.handleTechTextData_);\n    this.on(this.tech_, 'ratechange', this.handleTechRateChange_);\n\n    this.usingNativeControls(this.techGet_('controls'));\n\n    if (this.controls() && !this.usingNativeControls()) {\n      this.addTechControlsListeners_();\n    }\n\n    // Add the tech element in the DOM if it was not already there\n    // Make sure to not insert the original video element if using Html5\n    if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n      prependTo(this.tech_.el(), this.el());\n    }\n\n    // Get rid of the original video tag reference after the first tech is loaded\n    if (this.tag) {\n      this.tag.player = null;\n      this.tag = null;\n    }\n  };\n\n  /**\n   * Unload and dispose of the current playback {@link Tech}.\n   *\n   * @private\n   */\n\n\n  Player.prototype.unloadTech_ = function unloadTech_() {\n    var _this3 = this;\n\n    // Save the current text tracks so that we can reuse the same text tracks with the next tech\n    ALL.names.forEach(function (name$$1) {\n      var props = ALL[name$$1];\n\n      _this3[props.privateName] = _this3[props.getterName]();\n    });\n    this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n\n    this.isReady_ = false;\n\n    this.tech_.dispose();\n\n    this.tech_ = false;\n\n    if (this.isPosterFromTech_) {\n      this.poster_ = '';\n      this.trigger('posterchange');\n    }\n\n    this.isPosterFromTech_ = false;\n  };\n\n  /**\n   * Return a reference to the current {@link Tech}.\n   * It will print a warning by default about the danger of using the tech directly\n   * but any argument that is passed in will silence the warning.\n   *\n   * @param {*} [safety]\n   *        Anything passed in to silence the warning\n   *\n   * @return {Tech}\n   *         The Tech\n   */\n\n\n  Player.prototype.tech = function tech(safety) {\n    if (safety === undefined) {\n      log.warn(tsml(_templateObject$1));\n    }\n\n    return this.tech_;\n  };\n\n  /**\n   * Set up click and touch listeners for the playback element\n   *\n   * - On desktops: a click on the video itself will toggle playback\n   * - On mobile devices: a click on the video toggles controls\n   *   which is done by toggling the user state between active and\n   *   inactive\n   * - A tap can signal that a user has become active or has become inactive\n   *   e.g. a quick tap on an iPhone movie should reveal the controls. Another\n   *   quick tap should hide them again (signaling the user is in an inactive\n   *   viewing state)\n   * - In addition to this, we still want the user to be considered inactive after\n   *   a few seconds of inactivity.\n   *\n   * > Note: the only part of iOS interaction we can't mimic with this setup\n   * is a touch and hold on the video element counting as activity in order to\n   * keep the controls showing, but that shouldn't be an issue. A touch and hold\n   * on any controls will still keep the user active\n   *\n   * @private\n   */\n\n\n  Player.prototype.addTechControlsListeners_ = function addTechControlsListeners_() {\n    // Make sure to remove all the previous listeners in case we are called multiple times.\n    this.removeTechControlsListeners_();\n\n    // Some browsers (Chrome & IE) don't trigger a click on a flash swf, but do\n    // trigger mousedown/up.\n    // http://stackoverflow.com/questions/1444562/javascript-onclick-event-over-flash-object\n    // Any touch events are set to block the mousedown event from happening\n    this.on(this.tech_, 'mousedown', this.handleTechClick_);\n\n    // If the controls were hidden we don't want that to change without a tap event\n    // so we'll check if the controls were already showing before reporting user\n    // activity\n    this.on(this.tech_, 'touchstart', this.handleTechTouchStart_);\n    this.on(this.tech_, 'touchmove', this.handleTechTouchMove_);\n    this.on(this.tech_, 'touchend', this.handleTechTouchEnd_);\n\n    // The tap listener needs to come after the touchend listener because the tap\n    // listener cancels out any reportedUserActivity when setting userActive(false)\n    this.on(this.tech_, 'tap', this.handleTechTap_);\n  };\n\n  /**\n   * Remove the listeners used for click and tap controls. This is needed for\n   * toggling to controls disabled, where a tap/touch should do nothing.\n   *\n   * @private\n   */\n\n\n  Player.prototype.removeTechControlsListeners_ = function removeTechControlsListeners_() {\n    // We don't want to just use `this.off()` because there might be other needed\n    // listeners added by techs that extend this.\n    this.off(this.tech_, 'tap', this.handleTechTap_);\n    this.off(this.tech_, 'touchstart', this.handleTechTouchStart_);\n    this.off(this.tech_, 'touchmove', this.handleTechTouchMove_);\n    this.off(this.tech_, 'touchend', this.handleTechTouchEnd_);\n    this.off(this.tech_, 'mousedown', this.handleTechClick_);\n  };\n\n  /**\n   * Player waits for the tech to be ready\n   *\n   * @private\n   */\n\n\n  Player.prototype.handleTechReady_ = function handleTechReady_() {\n    this.triggerReady();\n\n    // Keep the same volume as before\n    if (this.cache_.volume) {\n      this.techCall_('setVolume', this.cache_.volume);\n    }\n\n    // Look if the tech found a higher resolution poster while loading\n    this.handleTechPosterChange_();\n\n    // Update the duration if available\n    this.handleTechDurationChange_();\n\n    // Chrome and Safari both have issues with autoplay.\n    // In Safari (5.1.1), when we move the video element into the container div, autoplay doesn't work.\n    // In Chrome (15), if you have autoplay + a poster + no controls, the video gets hidden (but audio plays)\n    // This fixes both issues. Need to wait for API, so it updates displays correctly\n    if ((this.src() || this.currentSrc()) && this.tag && this.options_.autoplay && this.paused()) {\n      try {\n        // Chrome Fix. Fixed in Chrome v16.\n        delete this.tag.poster;\n      } catch (e) {\n        log('deleting tag.poster throws in some browsers', e);\n      }\n    }\n  };\n\n  /**\n   * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This\n   * function will also trigger {@link Player#firstplay} if it is the first loadstart\n   * for a video.\n   *\n   * @fires Player#loadstart\n   * @fires Player#firstplay\n   * @listens Tech#loadstart\n   * @private\n   */\n\n\n  Player.prototype.handleTechLoadStart_ = function handleTechLoadStart_() {\n    // TODO: Update to use `emptied` event instead. See #1277.\n\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-seeking');\n\n    // reset the error state\n    this.error(null);\n\n    // If it's already playing we want to trigger a firstplay event now.\n    // The firstplay event relies on both the play and loadstart events\n    // which can happen in any order for a new source\n    if (!this.paused()) {\n      /**\n       * Fired when the user agent begins looking for media data\n       *\n       * @event Player#loadstart\n       * @type {EventTarget~Event}\n       */\n      this.trigger('loadstart');\n      this.trigger('firstplay');\n    } else {\n      // reset the hasStarted state\n      this.hasStarted(false);\n      this.trigger('loadstart');\n    }\n\n    // autoplay happens after loadstart for the browser,\n    // so we mimic that behavior\n    this.manualAutoplay_(this.autoplay());\n  };\n\n  /**\n   * Handle autoplay string values, rather than the typical boolean\n   * values that should be handled by the tech. Note that this is not\n   * part of any specification. Valid values and what they do can be\n   * found on the autoplay getter at Player#autoplay()\n   */\n\n\n  Player.prototype.manualAutoplay_ = function manualAutoplay_(type) {\n    var _this4 = this;\n\n    if (!this.tech_ || typeof type !== 'string') {\n      return;\n    }\n\n    var muted = function muted() {\n      var previouslyMuted = _this4.muted();\n\n      _this4.muted(true);\n\n      var playPromise = _this4.play();\n\n      if (!playPromise || !playPromise.then || !playPromise['catch']) {\n        return;\n      }\n\n      return playPromise['catch'](function (e) {\n        // restore old value of muted on failure\n        _this4.muted(previouslyMuted);\n      });\n    };\n\n    var promise = void 0;\n\n    if (type === 'any') {\n      promise = this.play();\n\n      if (promise && promise.then && promise['catch']) {\n        promise['catch'](function () {\n          return muted();\n        });\n      }\n    } else if (type === 'muted') {\n      promise = muted();\n    } else {\n      promise = this.play();\n    }\n\n    if (!promise || !promise.then || !promise['catch']) {\n      return;\n    }\n\n    return promise.then(function () {\n      _this4.trigger({ type: 'autoplay-success', autoplay: type });\n    })['catch'](function (e) {\n      _this4.trigger({ type: 'autoplay-failure', autoplay: type });\n    });\n  };\n\n  /**\n   * Update the internal source caches so that we return the correct source from\n   * `src()`, `currentSource()`, and `currentSources()`.\n   *\n   * > Note: `currentSources` will not be updated if the source that is passed in exists\n   *         in the current `currentSources` cache.\n   *\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        A string or object source to update our caches to.\n   */\n\n\n  Player.prototype.updateSourceCaches_ = function updateSourceCaches_() {\n    var srcObj = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';\n\n\n    var src = srcObj;\n    var type = '';\n\n    if (typeof src !== 'string') {\n      src = srcObj.src;\n      type = srcObj.type;\n    }\n\n    // make sure all the caches are set to default values\n    // to prevent null checking\n    this.cache_.source = this.cache_.source || {};\n    this.cache_.sources = this.cache_.sources || [];\n\n    // try to get the type of the src that was passed in\n    if (src && !type) {\n      type = findMimetype(this, src);\n    }\n\n    // update `currentSource` cache always\n    this.cache_.source = mergeOptions({}, srcObj, { src: src, type: type });\n\n    var matchingSources = this.cache_.sources.filter(function (s) {\n      return s.src && s.src === src;\n    });\n    var sourceElSources = [];\n    var sourceEls = this.$$('source');\n    var matchingSourceEls = [];\n\n    for (var i = 0; i < sourceEls.length; i++) {\n      var sourceObj = getAttributes(sourceEls[i]);\n\n      sourceElSources.push(sourceObj);\n\n      if (sourceObj.src && sourceObj.src === src) {\n        matchingSourceEls.push(sourceObj.src);\n      }\n    }\n\n    // if we have matching source els but not matching sources\n    // the current source cache is not up to date\n    if (matchingSourceEls.length && !matchingSources.length) {\n      this.cache_.sources = sourceElSources;\n      // if we don't have matching source or source els set the\n      // sources cache to the `currentSource` cache\n    } else if (!matchingSources.length) {\n      this.cache_.sources = [this.cache_.source];\n    }\n\n    // update the tech `src` cache\n    this.cache_.src = src;\n  };\n\n  /**\n   * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n   * causing the media element to reload.\n   *\n   * It will fire for the initial source and each subsequent source.\n   * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n   *\n   * The event object for this event contains a `src` property that will contain the source\n   * that was available when the event was triggered. This is generally only necessary if Video.js\n   * is switching techs while the source was being changed.\n   *\n   * It is also fired when `load` is called on the player (or media element)\n   * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n   * says that the resource selection algorithm needs to be aborted and restarted.\n   * In this case, it is very likely that the `src` property will be set to the\n   * empty string `\"\"` to indicate we do not know what the source will be but\n   * that it is changing.\n   *\n   * *This event is currently still experimental and may change in minor releases.*\n   * __To use this, pass `enableSourceset` option to the player.__\n   *\n   * @event Player#sourceset\n   * @type {EventTarget~Event}\n   * @prop {string} src\n   *                The source url available when the `sourceset` was triggered.\n   *                It will be an empty string if we cannot know what the source is\n   *                but know that the source will change.\n   */\n  /**\n   * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#sourceset\n   * @listens Tech#sourceset\n   * @private\n   */\n\n\n  Player.prototype.handleTechSourceset_ = function handleTechSourceset_(event) {\n    var _this5 = this;\n\n    // only update the source cache when the source\n    // was not updated using the player api\n    if (!this.changingSrc_) {\n      var updateSourceCaches = function updateSourceCaches(src) {\n        return _this5.updateSourceCaches_(src);\n      };\n      var playerSrc = this.currentSource().src;\n      var eventSrc = event.src;\n\n      // if we have a playerSrc that is not a blob, and a tech src that is a blob\n      if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n\n        // if both the tech source and the player source were updated we assume\n        // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n        if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n          updateSourceCaches = function updateSourceCaches() {};\n        }\n      }\n\n      // update the source to the intial source right away\n      // in some cases this will be empty string\n      updateSourceCaches(eventSrc);\n\n      // if the `sourceset` `src` was an empty string\n      // wait for a `loadstart` to update the cache to `currentSrc`.\n      // If a sourceset happens before a `loadstart`, we reset the state\n      // as this function will be called again.\n      if (!event.src) {\n        var updateCache = function updateCache(e) {\n          if (e.type !== 'sourceset') {\n            var techSrc = _this5.techGet('currentSrc');\n\n            _this5.lastSource_.tech = techSrc;\n            _this5.updateSourceCaches_(techSrc);\n          }\n\n          _this5.tech_.off(['sourceset', 'loadstart'], updateCache);\n        };\n\n        this.tech_.one(['sourceset', 'loadstart'], updateCache);\n      }\n    }\n    this.lastSource_ = { player: this.currentSource().src, tech: event.src };\n\n    this.trigger({\n      src: event.src,\n      type: 'sourceset'\n    });\n  };\n\n  /**\n   * Add/remove the vjs-has-started class\n   *\n   * @fires Player#firstplay\n   *\n   * @param {boolean} request\n   *        - true: adds the class\n   *        - false: remove the class\n   *\n   * @return {boolean}\n   *         the boolean value of hasStarted_\n   */\n\n\n  Player.prototype.hasStarted = function hasStarted(request) {\n    if (request === undefined) {\n      // act as getter, if we have no request to change\n      return this.hasStarted_;\n    }\n\n    if (request === this.hasStarted_) {\n      return;\n    }\n\n    this.hasStarted_ = request;\n\n    if (this.hasStarted_) {\n      this.addClass('vjs-has-started');\n      this.trigger('firstplay');\n    } else {\n      this.removeClass('vjs-has-started');\n    }\n  };\n\n  /**\n   * Fired whenever the media begins or resumes playback\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n   * @fires Player#play\n   * @listens Tech#play\n   * @private\n   */\n\n\n  Player.prototype.handleTechPlay_ = function handleTechPlay_() {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing');\n\n    // hide the poster when the user hits play\n    this.hasStarted(true);\n    /**\n     * Triggered whenever an {@link Tech#play} event happens. Indicates that\n     * playback has started or resumed.\n     *\n     * @event Player#play\n     * @type {EventTarget~Event}\n     */\n    this.trigger('play');\n  };\n\n  /**\n   * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n   *\n   * If there were any events queued while the playback rate was zero, fire\n   * those events now.\n   *\n   * @private\n   * @method Player#handleTechRateChange_\n   * @fires Player#ratechange\n   * @listens Tech#ratechange\n   */\n\n\n  Player.prototype.handleTechRateChange_ = function handleTechRateChange_() {\n    if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n      this.queuedCallbacks_.forEach(function (queued) {\n        return queued.callback(queued.event);\n      });\n      this.queuedCallbacks_ = [];\n    }\n    this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n    /**\n     * Fires when the playing speed of the audio/video is changed\n     *\n     * @event Player#ratechange\n     * @type {event}\n     */\n    this.trigger('ratechange');\n  };\n\n  /**\n   * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#waiting\n   * @listens Tech#waiting\n   * @private\n   */\n\n\n  Player.prototype.handleTechWaiting_ = function handleTechWaiting_() {\n    var _this6 = this;\n\n    this.addClass('vjs-waiting');\n    /**\n     * A readyState change on the DOM element has caused playback to stop.\n     *\n     * @event Player#waiting\n     * @type {EventTarget~Event}\n     */\n    this.trigger('waiting');\n    this.one('timeupdate', function () {\n      return _this6.removeClass('vjs-waiting');\n    });\n  };\n\n  /**\n   * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n   * > Note: This is not consistent between browsers. See #1351\n   *\n   * @fires Player#canplay\n   * @listens Tech#canplay\n   * @private\n   */\n\n\n  Player.prototype.handleTechCanPlay_ = function handleTechCanPlay_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_FUTURE_DATA or greater.\n     *\n     * @event Player#canplay\n     * @type {EventTarget~Event}\n     */\n    this.trigger('canplay');\n  };\n\n  /**\n   * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#canplaythrough\n   * @listens Tech#canplaythrough\n   * @private\n   */\n\n\n  Player.prototype.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n     * entire media file can be played without buffering.\n     *\n     * @event Player#canplaythrough\n     * @type {EventTarget~Event}\n     */\n    this.trigger('canplaythrough');\n  };\n\n  /**\n   * Retrigger the `playing` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#playing\n   * @listens Tech#playing\n   * @private\n   */\n\n\n  Player.prototype.handleTechPlaying_ = function handleTechPlaying_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media is no longer blocked from playback, and has started playing.\n     *\n     * @event Player#playing\n     * @type {EventTarget~Event}\n     */\n    this.trigger('playing');\n  };\n\n  /**\n   * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeking\n   * @listens Tech#seeking\n   * @private\n   */\n\n\n  Player.prototype.handleTechSeeking_ = function handleTechSeeking_() {\n    this.addClass('vjs-seeking');\n    /**\n     * Fired whenever the player is jumping to a new time\n     *\n     * @event Player#seeking\n     * @type {EventTarget~Event}\n     */\n    this.trigger('seeking');\n  };\n\n  /**\n   * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeked\n   * @listens Tech#seeked\n   * @private\n   */\n\n\n  Player.prototype.handleTechSeeked_ = function handleTechSeeked_() {\n    this.removeClass('vjs-seeking');\n    /**\n     * Fired when the player has finished jumping to a new time\n     *\n     * @event Player#seeked\n     * @type {EventTarget~Event}\n     */\n    this.trigger('seeked');\n  };\n\n  /**\n   * Retrigger the `firstplay` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#firstplay\n   * @listens Tech#firstplay\n   * @deprecated As of 6.0 firstplay event is deprecated.\n   *             As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.\n   * @private\n   */\n\n\n  Player.prototype.handleTechFirstPlay_ = function handleTechFirstPlay_() {\n    // If the first starttime attribute is specified\n    // then we will start at the given offset in seconds\n    if (this.options_.starttime) {\n      log.warn('Passing the `starttime` option to the player will be deprecated in 6.0');\n      this.currentTime(this.options_.starttime);\n    }\n\n    this.addClass('vjs-has-started');\n    /**\n     * Fired the first time a video is played. Not part of the HLS spec, and this is\n     * probably not the best implementation yet, so use sparingly. If you don't have a\n     * reason to prevent playback, use `myPlayer.one('play');` instead.\n     *\n     * @event Player#firstplay\n     * @deprecated As of 6.0 firstplay event is deprecated.\n     * @type {EventTarget~Event}\n     */\n    this.trigger('firstplay');\n  };\n\n  /**\n   * Retrigger the `pause` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#pause\n   * @listens Tech#pause\n   * @private\n   */\n\n\n  Player.prototype.handleTechPause_ = function handleTechPause_() {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    /**\n     * Fired whenever the media has been paused\n     *\n     * @event Player#pause\n     * @type {EventTarget~Event}\n     */\n    this.trigger('pause');\n  };\n\n  /**\n   * Retrigger the `ended` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#ended\n   * @listens Tech#ended\n   * @private\n   */\n\n\n  Player.prototype.handleTechEnded_ = function handleTechEnded_() {\n    this.addClass('vjs-ended');\n    if (this.options_.loop) {\n      this.currentTime(0);\n      this.play();\n    } else if (!this.paused()) {\n      this.pause();\n    }\n\n    /**\n     * Fired when the end of the media resource is reached (currentTime == duration)\n     *\n     * @event Player#ended\n     * @type {EventTarget~Event}\n     */\n    this.trigger('ended');\n  };\n\n  /**\n   * Fired when the duration of the media resource is first known or changed\n   *\n   * @listens Tech#durationchange\n   * @private\n   */\n\n\n  Player.prototype.handleTechDurationChange_ = function handleTechDurationChange_() {\n    this.duration(this.techGet_('duration'));\n  };\n\n  /**\n   * Handle a click on the media element to play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#mousedown\n   * @private\n   */\n\n\n  Player.prototype.handleTechClick_ = function handleTechClick_(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    // When controls are disabled a click should not toggle playback because\n    // the click is considered a control\n    if (!this.controls_) {\n      return;\n    }\n\n    if (this.paused()) {\n      silencePromise(this.play());\n    } else {\n      this.pause();\n    }\n  };\n\n  /**\n   * Handle a tap on the media element. It will toggle the user\n   * activity state, which hides and shows the controls.\n   *\n   * @listens Tech#tap\n   * @private\n   */\n\n\n  Player.prototype.handleTechTap_ = function handleTechTap_() {\n    this.userActive(!this.userActive());\n  };\n\n  /**\n   * Handle touch to start\n   *\n   * @listens Tech#touchstart\n   * @private\n   */\n\n\n  Player.prototype.handleTechTouchStart_ = function handleTechTouchStart_() {\n    this.userWasActive = this.userActive();\n  };\n\n  /**\n   * Handle touch to move\n   *\n   * @listens Tech#touchmove\n   * @private\n   */\n\n\n  Player.prototype.handleTechTouchMove_ = function handleTechTouchMove_() {\n    if (this.userWasActive) {\n      this.reportUserActivity();\n    }\n  };\n\n  /**\n   * Handle touch to end\n   *\n   * @param {EventTarget~Event} event\n   *        the touchend event that triggered\n   *        this function\n   *\n   * @listens Tech#touchend\n   * @private\n   */\n\n\n  Player.prototype.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {\n    // Stop the mouse events from also happening\n    event.preventDefault();\n  };\n\n  /**\n   * Fired when the player switches in or out of fullscreen mode\n   *\n   * @private\n   * @listens Player#fullscreenchange\n   */\n\n\n  Player.prototype.handleFullscreenChange_ = function handleFullscreenChange_() {\n    if (this.isFullscreen()) {\n      this.addClass('vjs-fullscreen');\n    } else {\n      this.removeClass('vjs-fullscreen');\n    }\n  };\n\n  /**\n   * native click events on the SWF aren't triggered on IE11, Win8.1RT\n   * use stageclick events triggered from inside the SWF instead\n   *\n   * @private\n   * @listens stageclick\n   */\n\n\n  Player.prototype.handleStageClick_ = function handleStageClick_() {\n    this.reportUserActivity();\n  };\n\n  /**\n   * Handle Tech Fullscreen Change\n   *\n   * @param {EventTarget~Event} event\n   *        the fullscreenchange event that triggered this function\n   *\n   * @param {Object} data\n   *        the data that was sent with the event\n   *\n   * @private\n   * @listens Tech#fullscreenchange\n   * @fires Player#fullscreenchange\n   */\n\n\n  Player.prototype.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {\n    if (data) {\n      this.isFullscreen(data.isFullscreen);\n    }\n    /**\n     * Fired when going in and out of fullscreen.\n     *\n     * @event Player#fullscreenchange\n     * @type {EventTarget~Event}\n     */\n    this.trigger('fullscreenchange');\n  };\n\n  /**\n   * Fires when an error occurred during the loading of an audio/video.\n   *\n   * @private\n   * @listens Tech#error\n   */\n\n\n  Player.prototype.handleTechError_ = function handleTechError_() {\n    var error = this.tech_.error();\n\n    this.error(error);\n  };\n\n  /**\n   * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#textdata\n   * @listens Tech#textdata\n   * @private\n   */\n\n\n  Player.prototype.handleTechTextData_ = function handleTechTextData_() {\n    var data = null;\n\n    if (arguments.length > 1) {\n      data = arguments[1];\n    }\n\n    /**\n     * Fires when we get a textdata event from tech\n     *\n     * @event Player#textdata\n     * @type {EventTarget~Event}\n     */\n    this.trigger('textdata', data);\n  };\n\n  /**\n   * Get object for cached values.\n   *\n   * @return {Object}\n   *         get the current object cache\n   */\n\n\n  Player.prototype.getCache = function getCache() {\n    return this.cache_;\n  };\n\n  /**\n   * Pass values to the playback tech\n   *\n   * @param {string} [method]\n   *        the method to call\n   *\n   * @param {Object} arg\n   *        the argument to pass\n   *\n   * @private\n   */\n\n\n  Player.prototype.techCall_ = function techCall_(method, arg) {\n    // If it's not ready yet, call method when it is\n\n    this.ready(function () {\n      if (method in allowedSetters) {\n        return set$1(this.middleware_, this.tech_, method, arg);\n      } else if (method in allowedMediators) {\n        return mediate(this.middleware_, this.tech_, method, arg);\n      }\n\n      try {\n        if (this.tech_) {\n          this.tech_[method](arg);\n        }\n      } catch (e) {\n        log(e);\n        throw e;\n      }\n    }, true);\n  };\n\n  /**\n   * Get calls can't wait for the tech, and sometimes don't need to.\n   *\n   * @param {string} method\n   *        Tech method\n   *\n   * @return {Function|undefined}\n   *         the method or undefined\n   *\n   * @private\n   */\n\n\n  Player.prototype.techGet_ = function techGet_(method) {\n    if (!this.tech_ || !this.tech_.isReady_) {\n      return;\n    }\n\n    if (method in allowedGetters) {\n      return get$1(this.middleware_, this.tech_, method);\n    } else if (method in allowedMediators) {\n      return mediate(this.middleware_, this.tech_, method);\n    }\n\n    // Flash likes to die and reload when you hide or reposition it.\n    // In these cases the object methods go away and we get errors.\n    // When that happens we'll catch the errors and inform tech that it's not ready any more.\n    try {\n      return this.tech_[method]();\n    } catch (e) {\n\n      // When building additional tech libs, an expected method may not be defined yet\n      if (this.tech_[method] === undefined) {\n        log('Video.js: ' + method + ' method not defined for ' + this.techName_ + ' playback technology.', e);\n        throw e;\n      }\n\n      // When a method isn't available on the object it throws a TypeError\n      if (e.name === 'TypeError') {\n        log('Video.js: ' + method + ' unavailable on ' + this.techName_ + ' playback technology element.', e);\n        this.tech_.isReady_ = false;\n        throw e;\n      }\n\n      // If error unknown, just log and throw\n      log(e);\n      throw e;\n    }\n  };\n\n  /**\n   * Attempt to begin playback at the first opportunity.\n   *\n   * @return {Promise|undefined}\n   *         Returns a promise if the browser supports Promises (or one\n   *         was passed in as an option). This promise will be resolved on\n   *         the return value of play. If this is undefined it will fulfill the\n   *         promise chain otherwise the promise chain will be fulfilled when\n   *         the promise from play is fulfilled.\n   */\n\n\n  Player.prototype.play = function play() {\n    var _this7 = this;\n\n    var PromiseClass = this.options_.Promise || window.Promise;\n\n    if (PromiseClass) {\n      return new PromiseClass(function (resolve) {\n        _this7.play_(resolve);\n      });\n    }\n\n    return this.play_();\n  };\n\n  /**\n   * The actual logic for play, takes a callback that will be resolved on the\n   * return value of play. This allows us to resolve to the play promise if there\n   * is one on modern browsers.\n   *\n   * @private\n   * @param {Function} [callback]\n   *        The callback that should be called when the techs play is actually called\n   */\n\n\n  Player.prototype.play_ = function play_() {\n    var _this8 = this;\n\n    var callback = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : silencePromise;\n\n    // If this is called while we have a play queued up on a loadstart, remove\n    // that listener to avoid getting in a potentially bad state.\n    if (this.playOnLoadstart_) {\n      this.off('loadstart', this.playOnLoadstart_);\n    }\n\n    // If the player/tech is not ready, queue up another call to `play()` for\n    // when it is. This will loop back into this method for another attempt at\n    // playback when the tech is ready.\n    if (!this.isReady_) {\n\n      // Bail out if we're already waiting for `ready`!\n      if (this.playWaitingForReady_) {\n        return;\n      }\n\n      this.playWaitingForReady_ = true;\n      this.ready(function () {\n        _this8.playWaitingForReady_ = false;\n        callback(_this8.play());\n      });\n\n      // If the player/tech is ready and we have a source, we can attempt playback.\n    } else if (!this.changingSrc_ && (this.src() || this.currentSrc())) {\n      callback(this.techGet_('play'));\n      return;\n\n      // If the tech is ready, but we do not have a source, we'll need to wait\n      // for both the `ready` and a `loadstart` when the source is finally\n      // resolved by middleware and set on the player.\n      //\n      // This can happen if `play()` is called while changing sources or before\n      // one has been set on the player.\n    } else {\n\n      this.playOnLoadstart_ = function () {\n        _this8.playOnLoadstart_ = null;\n        callback(_this8.play());\n      };\n\n      this.one('loadstart', this.playOnLoadstart_);\n    }\n  };\n\n  /**\n   * Pause the video playback\n   *\n   * @return {Player}\n   *         A reference to the player object this function was called on\n   */\n\n\n  Player.prototype.pause = function pause() {\n    this.techCall_('pause');\n  };\n\n  /**\n   * Check if the player is paused or has yet to play\n   *\n   * @return {boolean}\n   *         - false: if the media is currently playing\n   *         - true: if media is not currently playing\n   */\n\n\n  Player.prototype.paused = function paused() {\n    // The initial state of paused should be true (in Safari it's actually false)\n    return this.techGet_('paused') === false ? false : true;\n  };\n\n  /**\n   * Get a TimeRange object representing the current ranges of time that the user\n   * has played.\n   *\n   * @return {TimeRange}\n   *         A time range object that represents all the increments of time that have\n   *         been played.\n   */\n\n\n  Player.prototype.played = function played() {\n    return this.techGet_('played') || createTimeRanges(0, 0);\n  };\n\n  /**\n   * Returns whether or not the user is \"scrubbing\". Scrubbing is\n   * when the user has clicked the progress bar handle and is\n   * dragging it along the progress bar.\n   *\n   * @param {boolean} [isScrubbing]\n   *        wether the user is or is not scrubbing\n   *\n   * @return {boolean}\n   *         The value of scrubbing when getting\n   */\n\n\n  Player.prototype.scrubbing = function scrubbing(isScrubbing) {\n    if (typeof isScrubbing === 'undefined') {\n      return this.scrubbing_;\n    }\n    this.scrubbing_ = !!isScrubbing;\n\n    if (isScrubbing) {\n      this.addClass('vjs-scrubbing');\n    } else {\n      this.removeClass('vjs-scrubbing');\n    }\n  };\n\n  /**\n   * Get or set the current time (in seconds)\n   *\n   * @param {number|string} [seconds]\n   *        The time to seek to in seconds\n   *\n   * @return {number}\n   *         - the current time in seconds when getting\n   */\n\n\n  Player.prototype.currentTime = function currentTime(seconds) {\n    if (typeof seconds !== 'undefined') {\n      if (seconds < 0) {\n        seconds = 0;\n      }\n      this.techCall_('setCurrentTime', seconds);\n      return;\n    }\n\n    // cache last currentTime and return. default to 0 seconds\n    //\n    // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n    // currentTime when scrubbing, but may not provide much performance benefit afterall.\n    // Should be tested. Also something has to read the actual current time or the cache will\n    // never get updated.\n    this.cache_.currentTime = this.techGet_('currentTime') || 0;\n    return this.cache_.currentTime;\n  };\n\n  /**\n   * Normally gets the length in time of the video in seconds;\n   * in all but the rarest use cases an argument will NOT be passed to the method\n   *\n   * > **NOTE**: The video must have started loading before the duration can be\n   * known, and in the case of Flash, may not be known until the video starts\n   * playing.\n   *\n   * @fires Player#durationchange\n   *\n   * @param {number} [seconds]\n   *        The duration of the video to set in seconds\n   *\n   * @return {number}\n   *         - The duration of the video in seconds when getting\n   */\n\n\n  Player.prototype.duration = function duration(seconds) {\n    if (seconds === undefined) {\n      // return NaN if the duration is not known\n      return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n    }\n\n    seconds = parseFloat(seconds);\n\n    // Standardize on Inifity for signaling video is live\n    if (seconds < 0) {\n      seconds = Infinity;\n    }\n\n    if (seconds !== this.cache_.duration) {\n      // Cache the last set value for optimized scrubbing (esp. Flash)\n      this.cache_.duration = seconds;\n\n      if (seconds === Infinity) {\n        this.addClass('vjs-live');\n      } else {\n        this.removeClass('vjs-live');\n      }\n      /**\n       * @event Player#durationchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('durationchange');\n    }\n  };\n\n  /**\n   * Calculates how much time is left in the video. Not part\n   * of the native video API.\n   *\n   * @return {number}\n   *         The time remaining in seconds\n   */\n\n\n  Player.prototype.remainingTime = function remainingTime() {\n    return this.duration() - this.currentTime();\n  };\n\n  /**\n   * A remaining time function that is intented to be used when\n   * the time is to be displayed directly to the user.\n   *\n   * @return {number}\n   *         The rounded time remaining in seconds\n   */\n\n\n  Player.prototype.remainingTimeDisplay = function remainingTimeDisplay() {\n    return Math.floor(this.duration()) - Math.floor(this.currentTime());\n  };\n\n  //\n  // Kind of like an array of portions of the video that have been downloaded.\n\n  /**\n   * Get a TimeRange object with an array of the times of the video\n   * that have been downloaded. If you just want the percent of the\n   * video that's been downloaded, use bufferedPercent.\n   *\n   * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n   *\n   * @return {TimeRange}\n   *         A mock TimeRange object (following HTML spec)\n   */\n\n\n  Player.prototype.buffered = function buffered() {\n    var buffered = this.techGet_('buffered');\n\n    if (!buffered || !buffered.length) {\n      buffered = createTimeRanges(0, 0);\n    }\n\n    return buffered;\n  };\n\n  /**\n   * Get the percent (as a decimal) of the video that's been downloaded.\n   * This method is not a part of the native HTML video API.\n   *\n   * @return {number}\n   *         A decimal between 0 and 1 representing the percent\n   *         that is bufferred 0 being 0% and 1 being 100%\n   */\n\n\n  Player.prototype.bufferedPercent = function bufferedPercent$$1() {\n    return bufferedPercent(this.buffered(), this.duration());\n  };\n\n  /**\n   * Get the ending time of the last buffered time range\n   * This is used in the progress bar to encapsulate all time ranges.\n   *\n   * @return {number}\n   *         The end of the last buffered time range\n   */\n\n\n  Player.prototype.bufferedEnd = function bufferedEnd() {\n    var buffered = this.buffered();\n    var duration = this.duration();\n    var end = buffered.end(buffered.length - 1);\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    return end;\n  };\n\n  /**\n   * Get or set the current volume of the media\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         The current volume as a percent when getting\n   */\n\n\n  Player.prototype.volume = function volume(percentAsDecimal) {\n    var vol = void 0;\n\n    if (percentAsDecimal !== undefined) {\n      // Force value to between 0 and 1\n      vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n      this.cache_.volume = vol;\n      this.techCall_('setVolume', vol);\n\n      if (vol > 0) {\n        this.lastVolume_(vol);\n      }\n\n      return;\n    }\n\n    // Default to 1 when returning current volume.\n    vol = parseFloat(this.techGet_('volume'));\n    return isNaN(vol) ? 1 : vol;\n  };\n\n  /**\n   * Get the current muted state, or turn mute on or off\n   *\n   * @param {boolean} [muted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean}\n   *         - true if mute is on and getting\n   *         - false if mute is off and getting\n   */\n\n\n  Player.prototype.muted = function muted(_muted) {\n    if (_muted !== undefined) {\n      this.techCall_('setMuted', _muted);\n      return;\n    }\n    return this.techGet_('muted') || false;\n  };\n\n  /**\n   * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n   * indicates the state of muted on intial playback.\n   *\n   * ```js\n   *   var myPlayer = videojs('some-player-id');\n   *\n   *   myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n   *\n   *   // get, should be false\n   *   console.log(myPlayer.defaultMuted());\n   *   // set to true\n   *   myPlayer.defaultMuted(true);\n   *   // get should be true\n   *   console.log(myPlayer.defaultMuted());\n   * ```\n   *\n   * @param {boolean} [defaultMuted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean|Player}\n   *         - true if defaultMuted is on and getting\n   *         - false if defaultMuted is off and getting\n   *         - A reference to the current player when setting\n   */\n\n\n  Player.prototype.defaultMuted = function defaultMuted(_defaultMuted) {\n    if (_defaultMuted !== undefined) {\n      return this.techCall_('setDefaultMuted', _defaultMuted);\n    }\n    return this.techGet_('defaultMuted') || false;\n  };\n\n  /**\n   * Get the last volume, or set it\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new last volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         the current value of lastVolume as a percent when getting\n   *\n   * @private\n   */\n\n\n  Player.prototype.lastVolume_ = function lastVolume_(percentAsDecimal) {\n    if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n      this.cache_.lastVolume = percentAsDecimal;\n      return;\n    }\n    return this.cache_.lastVolume;\n  };\n\n  /**\n   * Check if current tech can support native fullscreen\n   * (e.g. with built in controls like iOS, so not our flash swf)\n   *\n   * @return {boolean}\n   *         if native fullscreen is supported\n   */\n\n\n  Player.prototype.supportsFullScreen = function supportsFullScreen() {\n    return this.techGet_('supportsFullScreen') || false;\n  };\n\n  /**\n   * Check if the player is in fullscreen mode or tell the player that it\n   * is or is not in fullscreen mode.\n   *\n   * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n   * property and instead document.fullscreenElement is used. But isFullscreen is\n   * still a valuable property for internal player workings.\n   *\n   * @param  {boolean} [isFS]\n   *         Set the players current fullscreen state\n   *\n   * @return {boolean}\n   *         - true if fullscreen is on and getting\n   *         - false if fullscreen is off and getting\n   */\n\n\n  Player.prototype.isFullscreen = function isFullscreen(isFS) {\n    if (isFS !== undefined) {\n      this.isFullscreen_ = !!isFS;\n      return;\n    }\n    return !!this.isFullscreen_;\n  };\n\n  /**\n   * Increase the size of the video to full screen\n   * In some browsers, full screen is not supported natively, so it enters\n   * \"full window mode\", where the video fills the browser window.\n   * In browsers and devices that support native full screen, sometimes the\n   * browser's default controls will be shown, and not the Video.js custom skin.\n   * This includes most mobile devices (iOS, Android) and older versions of\n   * Safari.\n   *\n   * @fires Player#fullscreenchange\n   */\n\n\n  Player.prototype.requestFullscreen = function requestFullscreen() {\n    var fsApi = FullscreenApi;\n\n    this.isFullscreen(true);\n\n    if (fsApi.requestFullscreen) {\n      // the browser supports going fullscreen at the element level so we can\n      // take the controls fullscreen as well as the video\n\n      // Trigger fullscreenchange event after change\n      // We have to specifically add this each time, and remove\n      // when canceling fullscreen. Otherwise if there's multiple\n      // players on a page, they would all be reacting to the same fullscreen\n      // events\n      on(document, fsApi.fullscreenchange, bind(this, function documentFullscreenChange(e) {\n        this.isFullscreen(document[fsApi.fullscreenElement]);\n\n        // If cancelling fullscreen, remove event listener.\n        if (this.isFullscreen() === false) {\n          off(document, fsApi.fullscreenchange, documentFullscreenChange);\n        }\n        /**\n         * @event Player#fullscreenchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('fullscreenchange');\n      }));\n\n      this.el_[fsApi.requestFullscreen]();\n    } else if (this.tech_.supportsFullScreen()) {\n      // we can't take the video.js controls fullscreen but we can go fullscreen\n      // with native controls\n      this.techCall_('enterFullScreen');\n    } else {\n      // fullscreen isn't supported so we'll just stretch the video element to\n      // fill the viewport\n      this.enterFullWindow();\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('fullscreenchange');\n    }\n  };\n\n  /**\n   * Return the video to its normal size after having been in full screen mode\n   *\n   * @fires Player#fullscreenchange\n   */\n\n\n  Player.prototype.exitFullscreen = function exitFullscreen() {\n    var fsApi = FullscreenApi;\n\n    this.isFullscreen(false);\n\n    // Check for browser element fullscreen support\n    if (fsApi.requestFullscreen) {\n      document[fsApi.exitFullscreen]();\n    } else if (this.tech_.supportsFullScreen()) {\n      this.techCall_('exitFullScreen');\n    } else {\n      this.exitFullWindow();\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('fullscreenchange');\n    }\n  };\n\n  /**\n   * When fullscreen isn't supported we can stretch the\n   * video container to as wide as the browser will let us.\n   *\n   * @fires Player#enterFullWindow\n   */\n\n\n  Player.prototype.enterFullWindow = function enterFullWindow() {\n    this.isFullWindow = true;\n\n    // Storing original doc overflow value to return to when fullscreen is off\n    this.docOrigOverflow = document.documentElement.style.overflow;\n\n    // Add listener for esc key to exit fullscreen\n    on(document, 'keydown', bind(this, this.fullWindowOnEscKey));\n\n    // Hide any scroll bars\n    document.documentElement.style.overflow = 'hidden';\n\n    // Apply fullscreen styles\n    addClass(document.body, 'vjs-full-window');\n\n    /**\n     * @event Player#enterFullWindow\n     * @type {EventTarget~Event}\n     */\n    this.trigger('enterFullWindow');\n  };\n\n  /**\n   * Check for call to either exit full window or\n   * full screen on ESC key\n   *\n   * @param {string} event\n   *        Event to check for key press\n   */\n\n\n  Player.prototype.fullWindowOnEscKey = function fullWindowOnEscKey(event) {\n    if (event.keyCode === 27) {\n      if (this.isFullscreen() === true) {\n        this.exitFullscreen();\n      } else {\n        this.exitFullWindow();\n      }\n    }\n  };\n\n  /**\n   * Exit full window\n   *\n   * @fires Player#exitFullWindow\n   */\n\n\n  Player.prototype.exitFullWindow = function exitFullWindow() {\n    this.isFullWindow = false;\n    off(document, 'keydown', this.fullWindowOnEscKey);\n\n    // Unhide scroll bars.\n    document.documentElement.style.overflow = this.docOrigOverflow;\n\n    // Remove fullscreen styles\n    removeClass(document.body, 'vjs-full-window');\n\n    // Resize the box, controller, and poster to original sizes\n    // this.positionAll();\n    /**\n     * @event Player#exitFullWindow\n     * @type {EventTarget~Event}\n     */\n    this.trigger('exitFullWindow');\n  };\n\n  /**\n   * Check whether the player can play a given mimetype\n   *\n   * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n   *\n   * @param {string} type\n   *        The mimetype to check\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  Player.prototype.canPlayType = function canPlayType(type) {\n    var can = void 0;\n\n    // Loop through each playback technology in the options order\n    for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {\n      var techName = j[i];\n      var tech = Tech.getTech(techName);\n\n      // Support old behavior of techs being registered as components.\n      // Remove once that deprecated behavior is removed.\n      if (!tech) {\n        tech = Component.getComponent(techName);\n      }\n\n      // Check if the current tech is defined before continuing\n      if (!tech) {\n        log.error('The \"' + techName + '\" tech is undefined. Skipped browser support check for that tech.');\n        continue;\n      }\n\n      // Check if the browser supports this technology\n      if (tech.isSupported()) {\n        can = tech.canPlayType(type);\n\n        if (can) {\n          return can;\n        }\n      }\n    }\n\n    return '';\n  };\n\n  /**\n   * Select source based on tech-order or source-order\n   * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n   * defaults to tech-order selection\n   *\n   * @param {Array} sources\n   *        The sources for a media asset\n   *\n   * @return {Object|boolean}\n   *         Object of source and tech order or false\n   */\n\n\n  Player.prototype.selectSource = function selectSource(sources) {\n    var _this9 = this;\n\n    // Get only the techs specified in `techOrder` that exist and are supported by the\n    // current platform\n    var techs = this.options_.techOrder.map(function (techName) {\n      return [techName, Tech.getTech(techName)];\n    }).filter(function (_ref) {\n      var techName = _ref[0],\n          tech = _ref[1];\n\n      // Check if the current tech is defined before continuing\n      if (tech) {\n        // Check if the browser supports this technology\n        return tech.isSupported();\n      }\n\n      log.error('The \"' + techName + '\" tech is undefined. Skipped browser support check for that tech.');\n      return false;\n    });\n\n    // Iterate over each `innerArray` element once per `outerArray` element and execute\n    // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n    // that value.\n    var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {\n      var found = void 0;\n\n      outerArray.some(function (outerChoice) {\n        return innerArray.some(function (innerChoice) {\n          found = tester(outerChoice, innerChoice);\n\n          if (found) {\n            return true;\n          }\n        });\n      });\n\n      return found;\n    };\n\n    var foundSourceAndTech = void 0;\n    var flip = function flip(fn) {\n      return function (a, b) {\n        return fn(b, a);\n      };\n    };\n    var finder = function finder(_ref2, source) {\n      var techName = _ref2[0],\n          tech = _ref2[1];\n\n      if (tech.canPlaySource(source, _this9.options_[techName.toLowerCase()])) {\n        return { source: source, tech: techName };\n      }\n    };\n\n    // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n    // to select from them based on their priority.\n    if (this.options_.sourceOrder) {\n      // Source-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n    } else {\n      // Tech-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n    }\n\n    return foundSourceAndTech || false;\n  };\n\n  /**\n   * Get or set the video source.\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n\n\n  Player.prototype.src = function src(source) {\n    var _this10 = this;\n\n    // getter usage\n    if (typeof source === 'undefined') {\n      return this.cache_.src || '';\n    }\n    // filter out invalid sources and turn our source into\n    // an array of source objects\n    var sources = filterSource(source);\n\n    // if a source was passed in then it is invalid because\n    // it was filtered to a zero length Array. So we have to\n    // show an error\n    if (!sources.length) {\n      this.setTimeout(function () {\n        this.error({ code: 4, message: this.localize(this.options_.notSupportedMessage) });\n      }, 0);\n      return;\n    }\n\n    // intial sources\n    this.changingSrc_ = true;\n\n    this.cache_.sources = sources;\n    this.updateSourceCaches_(sources[0]);\n\n    // middlewareSource is the source after it has been changed by middleware\n    setSource(this, sources[0], function (middlewareSource, mws) {\n      _this10.middleware_ = mws;\n\n      // since sourceSet is async we have to update the cache again after we select a source since\n      // the source that is selected could be out of order from the cache update above this callback.\n      _this10.cache_.sources = sources;\n      _this10.updateSourceCaches_(middlewareSource);\n\n      var err = _this10.src_(middlewareSource);\n\n      if (err) {\n        if (sources.length > 1) {\n          return _this10.src(sources.slice(1));\n        }\n\n        _this10.changingSrc_ = false;\n\n        // We need to wrap this in a timeout to give folks a chance to add error event handlers\n        _this10.setTimeout(function () {\n          this.error({ code: 4, message: this.localize(this.options_.notSupportedMessage) });\n        }, 0);\n\n        // we could not find an appropriate tech, but let's still notify the delegate that this is it\n        // this needs a better comment about why this is needed\n        _this10.triggerReady();\n\n        return;\n      }\n\n      setTech(mws, _this10.tech_);\n    });\n  };\n\n  /**\n   * Set the source object on the tech, returns a boolean that indicates wether\n   * there is a tech that can play the source or not\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object to set on the Tech\n   *\n   * @return {Boolean}\n   *         - True if there is no Tech to playback this source\n   *         - False otherwise\n   *\n   * @private\n   */\n\n\n  Player.prototype.src_ = function src_(source) {\n    var _this11 = this;\n\n    var sourceTech = this.selectSource([source]);\n\n    if (!sourceTech) {\n      return true;\n    }\n\n    if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n      this.changingSrc_ = true;\n      // load this technology with the chosen source\n      this.loadTech_(sourceTech.tech, sourceTech.source);\n      this.tech_.ready(function () {\n        _this11.changingSrc_ = false;\n      });\n      return false;\n    }\n\n    // wait until the tech is ready to set the source\n    // and set it synchronously if possible (#2326)\n    this.ready(function () {\n\n      // The setSource tech method was added with source handlers\n      // so older techs won't support it\n      // We need to check the direct prototype for the case where subclasses\n      // of the tech do not support source handlers\n      if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n        this.techCall_('setSource', source);\n      } else {\n        this.techCall_('src', source.src);\n      }\n\n      this.changingSrc_ = false;\n    }, true);\n\n    return false;\n  };\n\n  /**\n   * Begin loading the src data.\n   */\n\n\n  Player.prototype.load = function load() {\n    this.techCall_('load');\n  };\n\n  /**\n   * Reset the player. Loads the first tech in the techOrder,\n   * removes all the text tracks in the existing `tech`,\n   * and calls `reset` on the `tech`.\n   */\n\n\n  Player.prototype.reset = function reset() {\n    if (this.tech_) {\n      this.tech_.clearTracks('text');\n    }\n    this.loadTech_(this.options_.techOrder[0], null);\n    this.techCall_('reset');\n  };\n\n  /**\n   * Returns all of the current source objects.\n   *\n   * @return {Tech~SourceObject[]}\n   *         The current source objects\n   */\n\n\n  Player.prototype.currentSources = function currentSources() {\n    var source = this.currentSource();\n    var sources = [];\n\n    // assume `{}` or `{ src }`\n    if (Object.keys(source).length !== 0) {\n      sources.push(source);\n    }\n\n    return this.cache_.sources || sources;\n  };\n\n  /**\n   * Returns the current source object.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object\n   */\n\n\n  Player.prototype.currentSource = function currentSource() {\n    return this.cache_.source || {};\n  };\n\n  /**\n   * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n   * Can be used in conjuction with `currentType` to assist in rebuilding the current source object.\n   *\n   * @return {string}\n   *         The current source\n   */\n\n\n  Player.prototype.currentSrc = function currentSrc() {\n    return this.currentSource() && this.currentSource().src || '';\n  };\n\n  /**\n   * Get the current source type e.g. video/mp4\n   * This can allow you rebuild the current source object so that you could load the same\n   * source and tech later\n   *\n   * @return {string}\n   *         The source MIME type\n   */\n\n\n  Player.prototype.currentType = function currentType() {\n    return this.currentSource() && this.currentSource().type || '';\n  };\n\n  /**\n   * Get or set the preload attribute\n   *\n   * @param {boolean} [value]\n   *        - true means that we should preload\n   *        - false maens that we should not preload\n   *\n   * @return {string}\n   *         The preload attribute value when getting\n   */\n\n\n  Player.prototype.preload = function preload(value) {\n    if (value !== undefined) {\n      this.techCall_('setPreload', value);\n      this.options_.preload = value;\n      return;\n    }\n    return this.techGet_('preload');\n  };\n\n  /**\n   * Get or set the autoplay option. When this is a boolean it will\n   * modify the attribute on the tech. When this is a string the attribute on\n   * the tech will be removed and `Player` will handle autoplay on loadstarts.\n   *\n   * @param {boolean|string} [value]\n   *        - true: autoplay using the browser behavior\n   *        - false: do not autoplay\n   *        - 'play': call play() on every loadstart\n   *        - 'muted': call muted() then play() on every loadstart\n   *        - 'any': call play() on every loadstart. if that fails call muted() then play().\n   *        - *: values other than those listed here will be set `autoplay` to true\n   *\n   * @return {boolean|string}\n   *         The current value of autoplay when getting\n   */\n\n\n  Player.prototype.autoplay = function autoplay(value) {\n    // getter usage\n    if (value === undefined) {\n      return this.options_.autoplay || false;\n    }\n\n    var techAutoplay = void 0;\n\n    // if the value is a valid string set it to that\n    if (typeof value === 'string' && /(any|play|muted)/.test(value)) {\n      this.options_.autoplay = value;\n      this.manualAutoplay_(value);\n      techAutoplay = false;\n\n      // any falsy value sets autoplay to false in the browser,\n      // lets do the same\n    } else if (!value) {\n      this.options_.autoplay = false;\n\n      // any other value (ie truthy) sets autoplay to true\n    } else {\n      this.options_.autoplay = true;\n    }\n\n    techAutoplay = techAutoplay || this.options_.autoplay;\n\n    // if we don't have a tech then we do not queue up\n    // a setAutoplay call on tech ready. We do this because the\n    // autoplay option will be passed in the constructor and we\n    // do not need to set it twice\n    if (this.tech_) {\n      this.techCall_('setAutoplay', techAutoplay);\n    }\n  };\n\n  /**\n   * Set or unset the playsinline attribute.\n   * Playsinline tells the browser that non-fullscreen playback is preferred.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should try to play inline by default\n   *        - false means that we should use the browser's default playback mode,\n   *          which in most cases is inline. iOS Safari is a notable exception\n   *          and plays fullscreen by default.\n   *\n   * @return {string|Player}\n   *         - the current value of playsinline\n   *         - the player when setting\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n   */\n\n\n  Player.prototype.playsinline = function playsinline(value) {\n    if (value !== undefined) {\n      this.techCall_('setPlaysinline', value);\n      this.options_.playsinline = value;\n      return this;\n    }\n    return this.techGet_('playsinline');\n  };\n\n  /**\n   * Get or set the loop attribute on the video element.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should loop the video\n   *        - false means that we should not loop the video\n   *\n   * @return {string}\n   *         The current value of loop when getting\n   */\n\n\n  Player.prototype.loop = function loop(value) {\n    if (value !== undefined) {\n      this.techCall_('setLoop', value);\n      this.options_.loop = value;\n      return;\n    }\n    return this.techGet_('loop');\n  };\n\n  /**\n   * Get or set the poster image source url\n   *\n   * @fires Player#posterchange\n   *\n   * @param {string} [src]\n   *        Poster image source URL\n   *\n   * @return {string}\n   *         The current value of poster when getting\n   */\n\n\n  Player.prototype.poster = function poster(src) {\n    if (src === undefined) {\n      return this.poster_;\n    }\n\n    // The correct way to remove a poster is to set as an empty string\n    // other falsey values will throw errors\n    if (!src) {\n      src = '';\n    }\n\n    if (src === this.poster_) {\n      return;\n    }\n\n    // update the internal poster variable\n    this.poster_ = src;\n\n    // update the tech's poster\n    this.techCall_('setPoster', src);\n\n    this.isPosterFromTech_ = false;\n\n    // alert components that the poster has been set\n    /**\n     * This event fires when the poster image is changed on the player.\n     *\n     * @event Player#posterchange\n     * @type {EventTarget~Event}\n     */\n    this.trigger('posterchange');\n  };\n\n  /**\n   * Some techs (e.g. YouTube) can provide a poster source in an\n   * asynchronous way. We want the poster component to use this\n   * poster source so that it covers up the tech's controls.\n   * (YouTube's play button). However we only want to use this\n   * source if the player user hasn't set a poster through\n   * the normal APIs.\n   *\n   * @fires Player#posterchange\n   * @listens Tech#posterchange\n   * @private\n   */\n\n\n  Player.prototype.handleTechPosterChange_ = function handleTechPosterChange_() {\n    if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n      var newPoster = this.tech_.poster() || '';\n\n      if (newPoster !== this.poster_) {\n        this.poster_ = newPoster;\n        this.isPosterFromTech_ = true;\n\n        // Let components know the poster has changed\n        this.trigger('posterchange');\n      }\n    }\n  };\n\n  /**\n   * Get or set whether or not the controls are showing.\n   *\n   * @fires Player#controlsenabled\n   *\n   * @param {boolean} [bool]\n   *        - true to turn controls on\n   *        - false to turn controls off\n   *\n   * @return {boolean}\n   *         The current value of controls when getting\n   */\n\n\n  Player.prototype.controls = function controls(bool) {\n    if (bool === undefined) {\n      return !!this.controls_;\n    }\n\n    bool = !!bool;\n\n    // Don't trigger a change event unless it actually changed\n    if (this.controls_ === bool) {\n      return;\n    }\n\n    this.controls_ = bool;\n\n    if (this.usingNativeControls()) {\n      this.techCall_('setControls', bool);\n    }\n\n    if (this.controls_) {\n      this.removeClass('vjs-controls-disabled');\n      this.addClass('vjs-controls-enabled');\n      /**\n       * @event Player#controlsenabled\n       * @type {EventTarget~Event}\n       */\n      this.trigger('controlsenabled');\n      if (!this.usingNativeControls()) {\n        this.addTechControlsListeners_();\n      }\n    } else {\n      this.removeClass('vjs-controls-enabled');\n      this.addClass('vjs-controls-disabled');\n      /**\n       * @event Player#controlsdisabled\n       * @type {EventTarget~Event}\n       */\n      this.trigger('controlsdisabled');\n      if (!this.usingNativeControls()) {\n        this.removeTechControlsListeners_();\n      }\n    }\n  };\n\n  /**\n   * Toggle native controls on/off. Native controls are the controls built into\n   * devices (e.g. default iPhone controls), Flash, or other techs\n   * (e.g. Vimeo Controls)\n   * **This should only be set by the current tech, because only the tech knows\n   * if it can support native controls**\n   *\n   * @fires Player#usingnativecontrols\n   * @fires Player#usingcustomcontrols\n   *\n   * @param {boolean} [bool]\n   *        - true to turn native controls on\n   *        - false to turn native controls off\n   *\n   * @return {boolean}\n   *         The current value of native controls when getting\n   */\n\n\n  Player.prototype.usingNativeControls = function usingNativeControls(bool) {\n    if (bool === undefined) {\n      return !!this.usingNativeControls_;\n    }\n\n    bool = !!bool;\n\n    // Don't trigger a change event unless it actually changed\n    if (this.usingNativeControls_ === bool) {\n      return;\n    }\n\n    this.usingNativeControls_ = bool;\n\n    if (this.usingNativeControls_) {\n      this.addClass('vjs-using-native-controls');\n\n      /**\n       * player is using the native device controls\n       *\n       * @event Player#usingnativecontrols\n       * @type {EventTarget~Event}\n       */\n      this.trigger('usingnativecontrols');\n    } else {\n      this.removeClass('vjs-using-native-controls');\n\n      /**\n       * player is using the custom HTML controls\n       *\n       * @event Player#usingcustomcontrols\n       * @type {EventTarget~Event}\n       */\n      this.trigger('usingcustomcontrols');\n    }\n  };\n\n  /**\n   * Set or get the current MediaError\n   *\n   * @fires Player#error\n   *\n   * @param  {MediaError|string|number} [err]\n   *         A MediaError or a string/number to be turned\n   *         into a MediaError\n   *\n   * @return {MediaError|null}\n   *         The current MediaError when getting (or null)\n   */\n\n\n  Player.prototype.error = function error(err) {\n    if (err === undefined) {\n      return this.error_ || null;\n    }\n\n    // restoring to default\n    if (err === null) {\n      this.error_ = err;\n      this.removeClass('vjs-error');\n      if (this.errorDisplay) {\n        this.errorDisplay.close();\n      }\n      return;\n    }\n\n    this.error_ = new MediaError(err);\n\n    // add the vjs-error classname to the player\n    this.addClass('vjs-error');\n\n    // log the name of the error type and any message\n    // ie8 just logs \"[object object]\" if you just log the error object\n    log.error('(CODE:' + this.error_.code + ' ' + MediaError.errorTypes[this.error_.code] + ')', this.error_.message, this.error_);\n\n    /**\n     * @event Player#error\n     * @type {EventTarget~Event}\n     */\n    this.trigger('error');\n\n    return;\n  };\n\n  /**\n   * Report user activity\n   *\n   * @param {Object} event\n   *        Event object\n   */\n\n\n  Player.prototype.reportUserActivity = function reportUserActivity(event) {\n    this.userActivity_ = true;\n  };\n\n  /**\n   * Get/set if user is active\n   *\n   * @fires Player#useractive\n   * @fires Player#userinactive\n   *\n   * @param {boolean} [bool]\n   *        - true if the user is active\n   *        - false if the user is inactive\n   *\n   * @return {boolean}\n   *         The current value of userActive when getting\n   */\n\n\n  Player.prototype.userActive = function userActive(bool) {\n    if (bool === undefined) {\n      return this.userActive_;\n    }\n\n    bool = !!bool;\n\n    if (bool === this.userActive_) {\n      return;\n    }\n\n    this.userActive_ = bool;\n\n    if (this.userActive_) {\n      this.userActivity_ = true;\n      this.removeClass('vjs-user-inactive');\n      this.addClass('vjs-user-active');\n      /**\n       * @event Player#useractive\n       * @type {EventTarget~Event}\n       */\n      this.trigger('useractive');\n      return;\n    }\n\n    // Chrome/Safari/IE have bugs where when you change the cursor it can\n    // trigger a mousemove event. This causes an issue when you're hiding\n    // the cursor when the user is inactive, and a mousemove signals user\n    // activity. Making it impossible to go into inactive mode. Specifically\n    // this happens in fullscreen when we really need to hide the cursor.\n    //\n    // When this gets resolved in ALL browsers it can be removed\n    // https://code.google.com/p/chromium/issues/detail?id=103041\n    if (this.tech_) {\n      this.tech_.one('mousemove', function (e) {\n        e.stopPropagation();\n        e.preventDefault();\n      });\n    }\n\n    this.userActivity_ = false;\n    this.removeClass('vjs-user-active');\n    this.addClass('vjs-user-inactive');\n    /**\n     * @event Player#userinactive\n     * @type {EventTarget~Event}\n     */\n    this.trigger('userinactive');\n  };\n\n  /**\n   * Listen for user activity based on timeout value\n   *\n   * @private\n   */\n\n\n  Player.prototype.listenForUserActivity_ = function listenForUserActivity_() {\n    var mouseInProgress = void 0;\n    var lastMoveX = void 0;\n    var lastMoveY = void 0;\n    var handleActivity = bind(this, this.reportUserActivity);\n\n    var handleMouseMove = function handleMouseMove(e) {\n      // #1068 - Prevent mousemove spamming\n      // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n      if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n        lastMoveX = e.screenX;\n        lastMoveY = e.screenY;\n        handleActivity();\n      }\n    };\n\n    var handleMouseDown = function handleMouseDown() {\n      handleActivity();\n      // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n      this.clearInterval(mouseInProgress);\n      // Setting userActivity=true now and setting the interval to the same time\n      // as the activityCheck interval (250) should ensure we never miss the\n      // next activityCheck\n      mouseInProgress = this.setInterval(handleActivity, 250);\n    };\n\n    var handleMouseUp = function handleMouseUp(event) {\n      handleActivity();\n      // Stop the interval that maintains activity if the mouse/touch is down\n      this.clearInterval(mouseInProgress);\n    };\n\n    // Any mouse movement will be considered user activity\n    this.on('mousedown', handleMouseDown);\n    this.on('mousemove', handleMouseMove);\n    this.on('mouseup', handleMouseUp);\n\n    // Listen for keyboard navigation\n    // Shouldn't need to use inProgress interval because of key repeat\n    this.on('keydown', handleActivity);\n    this.on('keyup', handleActivity);\n\n    // Run an interval every 250 milliseconds instead of stuffing everything into\n    // the mousemove/touchmove function itself, to prevent performance degradation.\n    // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n    // then gets picked up by this loop\n    // http://ejohn.org/blog/learning-from-twitter/\n    var inactivityTimeout = void 0;\n\n    this.setInterval(function () {\n      // Check to see if mouse/touch activity has happened\n      if (!this.userActivity_) {\n        return;\n      }\n\n      // Reset the activity tracker\n      this.userActivity_ = false;\n\n      // If the user state was inactive, set the state to active\n      this.userActive(true);\n\n      // Clear any existing inactivity timeout to start the timer over\n      this.clearTimeout(inactivityTimeout);\n\n      var timeout = this.options_.inactivityTimeout;\n\n      if (timeout <= 0) {\n        return;\n      }\n\n      // In <timeout> milliseconds, if no more activity has occurred the\n      // user will be considered inactive\n      inactivityTimeout = this.setTimeout(function () {\n        // Protect against the case where the inactivityTimeout can trigger just\n        // before the next user activity is picked up by the activity check loop\n        // causing a flicker\n        if (!this.userActivity_) {\n          this.userActive(false);\n        }\n      }, timeout);\n    }, 250);\n  };\n\n  /**\n   * Gets or sets the current playback rate. A playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed\n   * playback, for instance.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n   *\n   * @param {number} [rate]\n   *       New playback rate to set.\n   *\n   * @return {number}\n   *         The current playback rate when getting or 1.0\n   */\n\n\n  Player.prototype.playbackRate = function playbackRate(rate) {\n    if (rate !== undefined) {\n      // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n      // that is registered above\n      this.techCall_('setPlaybackRate', rate);\n      return;\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n    }\n    return 1.0;\n  };\n\n  /**\n   * Gets or sets the current default playback rate. A default playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n   * defaultPlaybackRate will only represent what the intial playbackRate of a video was, not\n   * not the current playbackRate.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n   *\n   * @param {number} [rate]\n   *       New default playback rate to set.\n   *\n   * @return {number|Player}\n   *         - The default playback rate when getting or 1.0\n   *         - the player when setting\n   */\n\n\n  Player.prototype.defaultPlaybackRate = function defaultPlaybackRate(rate) {\n    if (rate !== undefined) {\n      return this.techCall_('setDefaultPlaybackRate', rate);\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.techGet_('defaultPlaybackRate');\n    }\n    return 1.0;\n  };\n\n  /**\n   * Gets or sets the audio flag\n   *\n   * @param {boolean} bool\n   *        - true signals that this is an audio player\n   *        - false signals that this is not an audio player\n   *\n   * @return {boolean}\n   *         The current value of isAudio when getting\n   */\n\n\n  Player.prototype.isAudio = function isAudio(bool) {\n    if (bool !== undefined) {\n      this.isAudio_ = !!bool;\n      return;\n    }\n\n    return !!this.isAudio_;\n  };\n\n  /**\n   * A helper method for adding a {@link TextTrack} to our\n   * {@link TextTrackList}.\n   *\n   * In addition to the W3C settings we allow adding additional info through options.\n   *\n   * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n   *\n   * @param {string} [kind]\n   *        the kind of TextTrack you are adding\n   *\n   * @param {string} [label]\n   *        the label to give the TextTrack label\n   *\n   * @param {string} [language]\n   *        the language to set on the TextTrack\n   *\n   * @return {TextTrack|undefined}\n   *         the TextTrack that was added or undefined\n   *         if there is no tech\n   */\n\n\n  Player.prototype.addTextTrack = function addTextTrack(kind, label, language) {\n    if (this.tech_) {\n      return this.tech_.addTextTrack(kind, label, language);\n    }\n  };\n\n  /**\n   * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}. It will\n   * automatically removed from the video element whenever the source changes, unless\n   * manualCleanup is set to false.\n   *\n   * @param {Object} options\n   *        Options to pass to {@link HTMLTrackElement} during creation. See\n   *        {@link HTMLTrackElement} for object properties that you should use.\n   *\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   *\n   * @return {HtmlTrackElement}\n   *         the HTMLTrackElement that was created and added\n   *         to the HtmlTrackElementList and the remote\n   *         TextTrackList\n   *\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   *             to \"false\" in upcoming versions of Video.js\n   */\n\n\n  Player.prototype.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    if (this.tech_) {\n      return this.tech_.addRemoteTextTrack(options, manualCleanup);\n    }\n  };\n\n  /**\n   * Remove a remote {@link TextTrack} from the respective\n   * {@link TextTrackList} and {@link HtmlTrackElementList}.\n   *\n   * @param {Object} track\n   *        Remote {@link TextTrack} to remove\n   *\n   * @return {undefined}\n   *         does not return anything\n   */\n\n\n  Player.prototype.removeRemoteTextTrack = function removeRemoteTextTrack() {\n    var _ref3 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},\n        _ref3$track = _ref3.track,\n        track = _ref3$track === undefined ? arguments[0] : _ref3$track;\n\n    // destructure the input into an object with a track argument, defaulting to arguments[0]\n    // default the whole argument to an empty object if nothing was passed in\n\n    if (this.tech_) {\n      return this.tech_.removeRemoteTextTrack(track);\n    }\n  };\n\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object|undefined}\n   *         An object with supported media playback quality metrics or undefined if there\n   *         is no tech or the tech does not support it.\n   */\n\n\n  Player.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return this.techGet_('getVideoPlaybackQuality');\n  };\n\n  /**\n   * Get video width\n   *\n   * @return {number}\n   *         current video width\n   */\n\n\n  Player.prototype.videoWidth = function videoWidth() {\n    return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n  };\n\n  /**\n   * Get video height\n   *\n   * @return {number}\n   *         current video height\n   */\n\n\n  Player.prototype.videoHeight = function videoHeight() {\n    return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n  };\n\n  /**\n   * The player's language code\n   * NOTE: The language should be set in the player options if you want the\n   * the controls to be built with a specific language. Changing the lanugage\n   * later will not update controls text.\n   *\n   * @param {string} [code]\n   *        the language code to set the player to\n   *\n   * @return {string}\n   *         The current language code when getting\n   */\n\n\n  Player.prototype.language = function language(code) {\n    if (code === undefined) {\n      return this.language_;\n    }\n\n    this.language_ = String(code).toLowerCase();\n  };\n\n  /**\n   * Get the player's language dictionary\n   * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n   * Languages specified directly in the player options have precedence\n   *\n   * @return {Array}\n   *         An array of of supported languages\n   */\n\n\n  Player.prototype.languages = function languages() {\n    return mergeOptions(Player.prototype.options_.languages, this.languages_);\n  };\n\n  /**\n   * returns a JavaScript object reperesenting the current track\n   * information. **DOES not return it as JSON**\n   *\n   * @return {Object}\n   *         Object representing the current of track info\n   */\n\n\n  Player.prototype.toJSON = function toJSON() {\n    var options = mergeOptions(this.options_);\n    var tracks = options.tracks;\n\n    options.tracks = [];\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      // deep merge tracks and null out player so no circular references\n      track = mergeOptions(track);\n      track.player = undefined;\n      options.tracks[i] = track;\n    }\n\n    return options;\n  };\n\n  /**\n   * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n   * component) that immediately overlays the player with arbitrary\n   * content and removes itself when closed.\n   *\n   * @param {string|Function|Element|Array|null} content\n   *        Same as {@link ModalDialog#content}'s param of the same name.\n   *        The most straight-forward usage is to provide a string or DOM\n   *        element.\n   *\n   * @param {Object} [options]\n   *        Extra options which will be passed on to the {@link ModalDialog}.\n   *\n   * @return {ModalDialog}\n   *         the {@link ModalDialog} that was created\n   */\n\n\n  Player.prototype.createModal = function createModal(content, options) {\n    var _this12 = this;\n\n    options = options || {};\n    options.content = content || '';\n\n    var modal = new ModalDialog(this, options);\n\n    this.addChild(modal);\n    modal.on('dispose', function () {\n      _this12.removeChild(modal);\n    });\n\n    modal.open();\n    return modal;\n  };\n\n  /**\n   * Change breakpoint classes when the player resizes.\n   *\n   * @private\n   */\n\n\n  Player.prototype.updateCurrentBreakpoint_ = function updateCurrentBreakpoint_() {\n    if (!this.responsive()) {\n      return;\n    }\n\n    var currentBreakpoint = this.currentBreakpoint();\n    var currentWidth = this.currentWidth();\n\n    for (var i = 0; i < BREAKPOINT_ORDER.length; i++) {\n      var candidateBreakpoint = BREAKPOINT_ORDER[i];\n      var maxWidth = this.breakpoints_[candidateBreakpoint];\n\n      if (currentWidth <= maxWidth) {\n\n        // The current breakpoint did not change, nothing to do.\n        if (currentBreakpoint === candidateBreakpoint) {\n          return;\n        }\n\n        // Only remove a class if there is a current breakpoint.\n        if (currentBreakpoint) {\n          this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n        }\n\n        this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n        this.breakpoint_ = candidateBreakpoint;\n        break;\n      }\n    }\n  };\n\n  /**\n   * Removes the current breakpoint.\n   *\n   * @private\n   */\n\n\n  Player.prototype.removeCurrentBreakpoint_ = function removeCurrentBreakpoint_() {\n    var className = this.currentBreakpointClass();\n\n    this.breakpoint_ = '';\n\n    if (className) {\n      this.removeClass(className);\n    }\n  };\n\n  /**\n   * Get or set breakpoints on the player.\n   *\n   * Calling this method with an object or `true` will remove any previous\n   * custom breakpoints and start from the defaults again.\n   *\n   * @param  {Object|boolean} [breakpoints]\n   *         If an object is given, it can be used to provide custom\n   *         breakpoints. If `true` is given, will set default breakpoints.\n   *         If this argument is not given, will simply return the current\n   *         breakpoints.\n   *\n   * @param  {number} [breakpoints.tiny]\n   *         The maximum width for the \"vjs-layout-tiny\" class.\n   *\n   * @param  {number} [breakpoints.xsmall]\n   *         The maximum width for the \"vjs-layout-x-small\" class.\n   *\n   * @param  {number} [breakpoints.small]\n   *         The maximum width for the \"vjs-layout-small\" class.\n   *\n   * @param  {number} [breakpoints.medium]\n   *         The maximum width for the \"vjs-layout-medium\" class.\n   *\n   * @param  {number} [breakpoints.large]\n   *         The maximum width for the \"vjs-layout-large\" class.\n   *\n   * @param  {number} [breakpoints.xlarge]\n   *         The maximum width for the \"vjs-layout-x-large\" class.\n   *\n   * @param  {number} [breakpoints.huge]\n   *         The maximum width for the \"vjs-layout-huge\" class.\n   *\n   * @return {Object}\n   *         An object mapping breakpoint names to maximum width values.\n   */\n\n\n  Player.prototype.breakpoints = function breakpoints(_breakpoints) {\n\n    // Used as a getter.\n    if (_breakpoints === undefined) {\n      return assign(this.breakpoints_);\n    }\n\n    this.breakpoint_ = '';\n    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, _breakpoints);\n\n    // When breakpoint definitions change, we need to update the currently\n    // selected breakpoint.\n    this.updateCurrentBreakpoint_();\n\n    // Clone the breakpoints before returning.\n    return assign(this.breakpoints_);\n  };\n\n  /**\n   * Get or set a flag indicating whether or not this player should adjust\n   * its UI based on its dimensions.\n   *\n   * @param  {boolean} value\n   *         Should be `true` if the player should adjust its UI based on its\n   *         dimensions; otherwise, should be `false`.\n   *\n   * @return {boolean}\n   *         Will be `true` if this player should adjust its UI based on its\n   *         dimensions; otherwise, will be `false`.\n   */\n\n\n  Player.prototype.responsive = function responsive(value) {\n\n    // Used as a getter.\n    if (value === undefined) {\n      return this.responsive_;\n    }\n\n    value = Boolean(value);\n    var current = this.responsive_;\n\n    // Nothing changed.\n    if (value === current) {\n      return;\n    }\n\n    // The value actually changed, set it.\n    this.responsive_ = value;\n\n    // Start listening for breakpoints and set the initial breakpoint if the\n    // player is now responsive.\n    if (value) {\n      this.on('playerresize', this.updateCurrentBreakpoint_);\n      this.updateCurrentBreakpoint_();\n\n      // Stop listening for breakpoints if the player is no longer responsive.\n    } else {\n      this.off('playerresize', this.updateCurrentBreakpoint_);\n      this.removeCurrentBreakpoint_();\n    }\n\n    return value;\n  };\n\n  /**\n   * Get current breakpoint name, if any.\n   *\n   * @return {string}\n   *         If there is currently a breakpoint set, returns a the key from the\n   *         breakpoints object matching it. Otherwise, returns an empty string.\n   */\n\n\n  Player.prototype.currentBreakpoint = function currentBreakpoint() {\n    return this.breakpoint_;\n  };\n\n  /**\n   * Get the current breakpoint class name.\n   *\n   * @return {string}\n   *         The matching class name (e.g. `\"vjs-layout-tiny\"` or\n   *         `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n   *         there is no current breakpoint.\n   */\n\n\n  Player.prototype.currentBreakpointClass = function currentBreakpointClass() {\n    return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n  };\n\n  /**\n   * Gets tag settings\n   *\n   * @param {Element} tag\n   *        The player tag\n   *\n   * @return {Object}\n   *         An object containing all of the settings\n   *         for a player tag\n   */\n\n\n  Player.getTagSettings = function getTagSettings(tag) {\n    var baseOptions = {\n      sources: [],\n      tracks: []\n    };\n\n    var tagOptions = getAttributes(tag);\n    var dataSetup = tagOptions['data-setup'];\n\n    if (hasClass(tag, 'vjs-fill')) {\n      tagOptions.fill = true;\n    }\n    if (hasClass(tag, 'vjs-fluid')) {\n      tagOptions.fluid = true;\n    }\n\n    // Check if data-setup attr exists.\n    if (dataSetup !== null) {\n      // Parse options JSON\n      // If empty string, make it a parsable json object.\n      var _safeParseTuple = safeParseTuple(dataSetup || '{}'),\n          err = _safeParseTuple[0],\n          data = _safeParseTuple[1];\n\n      if (err) {\n        log.error(err);\n      }\n      assign(tagOptions, data);\n    }\n\n    assign(baseOptions, tagOptions);\n\n    // Get tag children settings\n    if (tag.hasChildNodes()) {\n      var children = tag.childNodes;\n\n      for (var i = 0, j = children.length; i < j; i++) {\n        var child = children[i];\n        // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n        var childName = child.nodeName.toLowerCase();\n\n        if (childName === 'source') {\n          baseOptions.sources.push(getAttributes(child));\n        } else if (childName === 'track') {\n          baseOptions.tracks.push(getAttributes(child));\n        }\n      }\n    }\n\n    return baseOptions;\n  };\n\n  /**\n   * Determine wether or not flexbox is supported\n   *\n   * @return {boolean}\n   *         - true if flexbox is supported\n   *         - false if flexbox is not supported\n   */\n\n\n  Player.prototype.flexNotSupported_ = function flexNotSupported_() {\n    var elem = document.createElement('i');\n\n    // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more\n    // common flex features that we can rely on when checking for flex support.\n    return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style ||\n    // IE10-specific (2012 flex spec)\n    'msFlexOrder' in elem.style);\n  };\n\n  return Player;\n}(Component);\n\n/**\n * Get the {@link VideoTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n *         the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n *         the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n *         the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n/**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n *         The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n *         The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\nALL.names.forEach(function (name$$1) {\n  var props = ALL[name$$1];\n\n  Player.prototype[props.getterName] = function () {\n    if (this.tech_) {\n      return this.tech_[props.getterName]();\n    }\n\n    // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n    // these will be passed to the tech during loading\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n\n/**\n * Global player list\n *\n * @type {Object}\n */\nPlayer.players = {};\n\nvar navigator = window.navigator;\n\n/*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\nPlayer.prototype.options_ = {\n  // Default order of fallback technology\n  techOrder: Tech.defaultTechOrder_,\n\n  html5: {},\n  flash: {},\n\n  // default inactivity timeout\n  inactivityTimeout: 2000,\n\n  // default playback rates\n  playbackRates: [],\n  // Add playback rate selection by adding rates\n  // 'playbackRates': [0.5, 1, 1.5, 2],\n\n  // Included control sets\n  children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'controlBar', 'errorDisplay', 'textTrackSettings'],\n\n  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n\n  // locales and their language translations\n  languages: {},\n\n  // Default message to show when a video cannot be played.\n  notSupportedMessage: 'No compatible source was found for this media.',\n\n  breakpoints: {},\n  responsive: false\n};\n\nif (!IS_IE8) {\n  Player.prototype.options_.children.push('resizeManager');\n}\n\n[\n/**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n'ended',\n/**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n'seeking',\n/**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n'seekable',\n/**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n *   The element has not yet been initialised. All attributes are in\n *   their initial states.\n * - NETWORK_IDLE (numeric value 1)\n *   The element's resource selection algorithm is active and has\n *   selected a resource, but it is not actually using the network at\n *   this time.\n * - NETWORK_LOADING (numeric value 2)\n *   The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n *   The element's resource selection algorithm is active, but it has\n *   not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n'networkState',\n/**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n *   No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n *   Enough of the resource has been obtained that the duration of the\n *   resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n *   Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n *   Data for the immediate current playback position is available, as\n *   well as enough data for the user agent to advance the current\n *   playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n *   The user agent estimates that enough data is available for\n *   playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n'readyState'].forEach(function (fn) {\n  Player.prototype[fn] = function () {\n    return this.techGet_(fn);\n  };\n});\n\nTECH_EVENTS_RETRIGGER.forEach(function (event) {\n  Player.prototype['handleTech' + toTitleCase(event) + '_'] = function () {\n    return this.trigger(event);\n  };\n});\n\n/**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {EventTarget~Event}\n */\n\n/**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param  {string}  name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player has the requested plugin available.\n */\n\n/**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player is using the requested plugin.\n */\n\nComponent.registerComponent('Player', Player);\n\n/**\n * @file plugin.js\n */\n/**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\nvar BASE_PLUGIN_NAME = 'plugin';\n\n/**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type     {string}\n */\nvar PLUGIN_CACHE_KEY = 'activePlugins_';\n\n/**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type    {Object}\n */\nvar pluginStorage = {};\n\n/**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @returns {boolean}\n *          Whether or not the plugin has been registered.\n */\nvar pluginExists = function pluginExists(name) {\n  return pluginStorage.hasOwnProperty(name);\n};\n\n/**\n * Get a single registered plugin by name.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @returns {Function|undefined}\n *          The plugin (or undefined).\n */\nvar getPlugin = function getPlugin(name) {\n  return pluginExists(name) ? pluginStorage[name] : undefined;\n};\n\n/**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param   {Player} player\n *          A Video.js player instance.\n *\n * @param   {string} name\n *          The name of a plugin.\n */\nvar markPluginAsActive = function markPluginAsActive(player, name) {\n  player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n  player[PLUGIN_CACHE_KEY][name] = true;\n};\n\n/**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param  {Player} player\n *         A Video.js player instance.\n *\n * @param  {Plugin~PluginEventHash} hash\n *         A plugin event hash.\n *\n * @param  {Boolean} [before]\n *         If true, prefixes the event name with \"before\". In other words,\n *         use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\nvar triggerSetupEvent = function triggerSetupEvent(player, hash, before) {\n  var eventName = (before ? 'before' : '') + 'pluginsetup';\n\n  player.trigger(eventName, hash);\n  player.trigger(eventName + ':' + hash.name, hash);\n};\n\n/**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Function} plugin\n *          The basic plugin.\n *\n * @returns {Function}\n *          A wrapper function for the given plugin.\n */\nvar createBasicPlugin = function createBasicPlugin(name, plugin) {\n  var basicPluginWrapper = function basicPluginWrapper() {\n\n    // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n    // regardless, but we want the hash to be consistent with the hash provided\n    // for advanced plugins.\n    //\n    // The only potentially counter-intuitive thing here is the `instance` in\n    // the \"pluginsetup\" event is the value returned by the `plugin` function.\n    triggerSetupEvent(this, { name: name, plugin: plugin, instance: null }, true);\n\n    var instance = plugin.apply(this, arguments);\n\n    markPluginAsActive(this, name);\n    triggerSetupEvent(this, { name: name, plugin: plugin, instance: instance });\n\n    return instance;\n  };\n\n  Object.keys(plugin).forEach(function (prop) {\n    basicPluginWrapper[prop] = plugin[prop];\n  });\n\n  return basicPluginWrapper;\n};\n\n/**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Plugin} PluginSubClass\n *          The advanced plugin.\n *\n * @returns {Function}\n */\nvar createPluginFactory = function createPluginFactory(name, PluginSubClass) {\n\n  // Add a `name` property to the plugin prototype so that each plugin can\n  // refer to itself by name.\n  PluginSubClass.prototype.name = name;\n\n  return function () {\n    triggerSetupEvent(this, { name: name, plugin: PluginSubClass, instance: null }, true);\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var instance = new (Function.prototype.bind.apply(PluginSubClass, [null].concat([this].concat(args))))();\n\n    // The plugin is replaced by a function that returns the current instance.\n    this[name] = function () {\n      return instance;\n    };\n\n    triggerSetupEvent(this, instance.getEventHash());\n\n    return instance;\n  };\n};\n\n/**\n * Parent class for all advanced plugins.\n *\n * @mixes   module:evented~EventedMixin\n * @mixes   module:stateful~StatefulMixin\n * @fires   Player#beforepluginsetup\n * @fires   Player#beforepluginsetup:$name\n * @fires   Player#pluginsetup\n * @fires   Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws  {Error}\n *          If attempting to instantiate the base {@link Plugin} class\n *          directly instead of via a sub-class.\n */\n\nvar Plugin = function () {\n\n  /**\n   * Creates an instance of this class.\n   *\n   * Sub-classes should call `super` to ensure plugins are properly initialized.\n   *\n   * @param {Player} player\n   *        A Video.js player instance.\n   */\n  function Plugin(player) {\n    classCallCheck(this, Plugin);\n\n    if (this.constructor === Plugin) {\n      throw new Error('Plugin must be sub-classed; not directly instantiated.');\n    }\n\n    this.player = player;\n\n    // Make this object evented, but remove the added `trigger` method so we\n    // use the prototype version instead.\n    evented(this);\n    delete this.trigger;\n\n    stateful(this, this.constructor.defaultState);\n    markPluginAsActive(player, this.name);\n\n    // Auto-bind the dispose method so we can use it as a listener and unbind\n    // it later easily.\n    this.dispose = bind(this, this.dispose);\n\n    // If the player is disposed, dispose the plugin.\n    player.on('dispose', this.dispose);\n  }\n\n  /**\n   * Get the version of the plugin that was set on <pluginName>.VERSION\n   */\n\n\n  Plugin.prototype.version = function version() {\n    return this.constructor.VERSION;\n  };\n\n  /**\n   * Each event triggered by plugins includes a hash of additional data with\n   * conventional properties.\n   *\n   * This returns that object or mutates an existing hash.\n   *\n   * @param   {Object} [hash={}]\n   *          An object to be used as event an event hash.\n   *\n   * @returns {Plugin~PluginEventHash}\n   *          An event hash object with provided properties mixed-in.\n   */\n\n\n  Plugin.prototype.getEventHash = function getEventHash() {\n    var hash = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n    hash.name = this.name;\n    hash.plugin = this.constructor;\n    hash.instance = this;\n    return hash;\n  };\n\n  /**\n   * Triggers an event on the plugin object and overrides\n   * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash={}]\n   *          Additional data hash to merge with a\n   *          {@link Plugin~PluginEventHash|PluginEventHash}.\n   *\n   * @returns {boolean}\n   *          Whether or not default was prevented.\n   */\n\n\n  Plugin.prototype.trigger = function trigger$$1(event) {\n    var hash = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n  };\n\n  /**\n   * Handles \"statechanged\" events on the plugin. No-op by default, override by\n   * subclassing.\n   *\n   * @abstract\n   * @param    {Event} e\n   *           An event object provided by a \"statechanged\" event.\n   *\n   * @param    {Object} e.changes\n   *           An object describing changes that occurred with the \"statechanged\"\n   *           event.\n   */\n\n\n  Plugin.prototype.handleStateChanged = function handleStateChanged(e) {};\n\n  /**\n   * Disposes a plugin.\n   *\n   * Subclasses can override this if they want, but for the sake of safety,\n   * it's probably best to subscribe the \"dispose\" event.\n   *\n   * @fires Plugin#dispose\n   */\n\n\n  Plugin.prototype.dispose = function dispose() {\n    var name = this.name,\n        player = this.player;\n\n    /**\n     * Signals that a advanced plugin is about to be disposed.\n     *\n     * @event Plugin#dispose\n     * @type  {EventTarget~Event}\n     */\n\n    this.trigger('dispose');\n    this.off();\n    player.off('dispose', this.dispose);\n\n    // Eliminate any possible sources of leaking memory by clearing up\n    // references between the player and the plugin instance and nulling out\n    // the plugin's state and replacing methods with a function that throws.\n    player[PLUGIN_CACHE_KEY][name] = false;\n    this.player = this.state = null;\n\n    // Finally, replace the plugin name on the player with a new factory\n    // function, so that the plugin is ready to be set up again.\n    player[name] = createPluginFactory(name, pluginStorage[name]);\n  };\n\n  /**\n   * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n   *\n   * @param   {string|Function} plugin\n   *          If a string, matches the name of a plugin. If a function, will be\n   *          tested directly.\n   *\n   * @returns {boolean}\n   *          Whether or not a plugin is a basic plugin.\n   */\n\n\n  Plugin.isBasic = function isBasic(plugin) {\n    var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n\n    return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n  };\n\n  /**\n   * Register a Video.js plugin.\n   *\n   * @param   {string} name\n   *          The name of the plugin to be registered. Must be a string and\n   *          must not match an existing plugin or a method on the `Player`\n   *          prototype.\n   *\n   * @param   {Function} plugin\n   *          A sub-class of `Plugin` or a function for basic plugins.\n   *\n   * @returns {Function}\n   *          For advanced plugins, a factory function for that plugin. For\n   *          basic plugins, a wrapper function that initializes the plugin.\n   */\n\n\n  Plugin.registerPlugin = function registerPlugin(name, plugin) {\n    if (typeof name !== 'string') {\n      throw new Error('Illegal plugin name, \"' + name + '\", must be a string, was ' + (typeof name === 'undefined' ? 'undefined' : _typeof(name)) + '.');\n    }\n\n    if (pluginExists(name)) {\n      log.warn('A plugin named \"' + name + '\" already exists. You may want to avoid re-registering plugins!');\n    } else if (Player.prototype.hasOwnProperty(name)) {\n      throw new Error('Illegal plugin name, \"' + name + '\", cannot share a name with an existing player method!');\n    }\n\n    if (typeof plugin !== 'function') {\n      throw new Error('Illegal plugin for \"' + name + '\", must be a function, was ' + (typeof plugin === 'undefined' ? 'undefined' : _typeof(plugin)) + '.');\n    }\n\n    pluginStorage[name] = plugin;\n\n    // Add a player prototype method for all sub-classed plugins (but not for\n    // the base Plugin class).\n    if (name !== BASE_PLUGIN_NAME) {\n      if (Plugin.isBasic(plugin)) {\n        Player.prototype[name] = createBasicPlugin(name, plugin);\n      } else {\n        Player.prototype[name] = createPluginFactory(name, plugin);\n      }\n    }\n\n    return plugin;\n  };\n\n  /**\n   * De-register a Video.js plugin.\n   *\n   * @param {string} name\n   *        The name of the plugin to be deregistered.\n   */\n\n\n  Plugin.deregisterPlugin = function deregisterPlugin(name) {\n    if (name === BASE_PLUGIN_NAME) {\n      throw new Error('Cannot de-register base plugin.');\n    }\n    if (pluginExists(name)) {\n      delete pluginStorage[name];\n      delete Player.prototype[name];\n    }\n  };\n\n  /**\n   * Gets an object containing multiple Video.js plugins.\n   *\n   * @param   {Array} [names]\n   *          If provided, should be an array of plugin names. Defaults to _all_\n   *          plugin names.\n   *\n   * @returns {Object|undefined}\n   *          An object containing plugin(s) associated with their name(s) or\n   *          `undefined` if no matching plugins exist).\n   */\n\n\n  Plugin.getPlugins = function getPlugins() {\n    var names = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Object.keys(pluginStorage);\n\n    var result = void 0;\n\n    names.forEach(function (name) {\n      var plugin = getPlugin(name);\n\n      if (plugin) {\n        result = result || {};\n        result[name] = plugin;\n      }\n    });\n\n    return result;\n  };\n\n  /**\n   * Gets a plugin's version, if available\n   *\n   * @param   {string} name\n   *          The name of a plugin.\n   *\n   * @returns {string}\n   *          The plugin's version or an empty string.\n   */\n\n\n  Plugin.getPluginVersion = function getPluginVersion(name) {\n    var plugin = getPlugin(name);\n\n    return plugin && plugin.VERSION || '';\n  };\n\n  return Plugin;\n}();\n\n/**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method   getPlugin\n * @memberOf Plugin\n * @param    {string} name\n *           The name of a plugin.\n *\n * @returns  {Function|undefined}\n *           The plugin (or `undefined`).\n */\n\n\nPlugin.getPlugin = getPlugin;\n\n/**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\nPlugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\n\nPlugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n\n/**\n * Documented in player.js\n *\n * @ignore\n */\nPlayer.prototype.usingPlugin = function (name) {\n  return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n};\n\n/**\n * Documented in player.js\n *\n * @ignore\n */\nPlayer.prototype.hasPlugin = function (name) {\n  return !!pluginExists(name);\n};\n\n/**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event    Player#beforepluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#beforepluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player.\n *\n * @event    Player#pluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#pluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * @typedef  {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n *           For basic plugins, the return value of the plugin function. For\n *           advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n *           The name of the plugin.\n *\n * @property {string} plugin\n *           For basic plugins, the plugin function. For advanced plugins, the\n *           plugin class/constructor.\n */\n\n/**\n * @file extend.js\n * @module extend\n */\n\n/**\n * A combination of node inherits and babel's inherits (after transpile).\n * Both work the same but node adds `super_` to the subClass\n * and Bable adds the superClass as __proto__. Both seem useful.\n *\n * @param {Object} subClass\n *        The class to inherit to\n *\n * @param {Object} superClass\n *        The class to inherit from\n *\n * @private\n */\nvar _inherits = function _inherits(subClass, superClass) {\n  if (typeof superClass !== 'function' && superClass !== null) {\n    throw new TypeError('Super expression must either be null or a function, not ' + (typeof superClass === 'undefined' ? 'undefined' : _typeof(superClass)));\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n\n  if (superClass) {\n    // node\n    subClass.super_ = superClass;\n  }\n};\n\n/**\n * Function for subclassing using the same inheritance that\n * videojs uses internally\n *\n * @static\n * @const\n *\n * @param {Object} superClass\n *        The class to inherit from\n *\n * @param {Object} [subClassMethods={}]\n *        The class to inherit to\n *\n * @return {Object}\n *         The new object with subClassMethods that inherited superClass.\n */\nvar extendFn = function extendFn(superClass) {\n  var subClassMethods = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n  var subClass = function subClass() {\n    superClass.apply(this, arguments);\n  };\n\n  var methods = {};\n\n  if ((typeof subClassMethods === 'undefined' ? 'undefined' : _typeof(subClassMethods)) === 'object') {\n    if (subClassMethods.constructor !== Object.prototype.constructor) {\n      subClass = subClassMethods.constructor;\n    }\n    methods = subClassMethods;\n  } else if (typeof subClassMethods === 'function') {\n    subClass = subClassMethods;\n  }\n\n  _inherits(subClass, superClass);\n\n  // Extend subObj's prototype with functions and other properties from props\n  for (var name in methods) {\n    if (methods.hasOwnProperty(name)) {\n      subClass.prototype[name] = methods[name];\n    }\n  }\n\n  return subClass;\n};\n\n/**\n * @file video.js\n * @module videojs\n */\n// Include the built-in techs\n// HTML5 Element Shim for IE8\nif (typeof HTMLVideoElement === 'undefined' && isReal()) {\n  document.createElement('video');\n  document.createElement('audio');\n  document.createElement('track');\n  document.createElement('video-js');\n}\n\n/**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @param   {string} id\n *          A string, maybe with a leading `#`.\n *\n * @returns {string}\n *          The string, without any leading `#`.\n */\nvar normalizeId = function normalizeId(id) {\n  return id.indexOf('#') === 0 ? id.slice(1) : id;\n};\n\n/**\n * Doubles as the main function for users to create a player instance and also\n * the main library object.\n * The `videojs` function can be used to initialize or retrieve a player.\n  *\n * @param {string|Element} id\n *        Video element or video element ID\n *\n * @param {Object} [options]\n *        Optional options object for config/settings\n *\n * @param {Component~ReadyCallback} [ready]\n *        Optional ready callback\n *\n * @return {Player}\n *         A player instance\n */\nfunction videojs(id, options, ready) {\n  var player = videojs.getPlayer(id);\n\n  if (player) {\n    if (options) {\n      log.warn('Player \"' + id + '\" is already initialised. Options will not be applied.');\n    }\n    if (ready) {\n      player.ready(ready);\n    }\n    return player;\n  }\n\n  var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n\n  if (!isEl(el)) {\n    throw new TypeError('The element or ID supplied is not valid. (videojs)');\n  }\n\n  if (!document.body.contains(el)) {\n    log.warn('The element supplied is not included in the DOM');\n  }\n\n  options = options || {};\n\n  videojs.hooks('beforesetup').forEach(function (hookFunction) {\n    var opts = hookFunction(el, mergeOptions(options));\n\n    if (!isObject(opts) || Array.isArray(opts)) {\n      log.error('please return an object in beforesetup hooks');\n      return;\n    }\n\n    options = mergeOptions(options, opts);\n  });\n\n  // We get the current \"Player\" component here in case an integration has\n  // replaced it with a custom player.\n  var PlayerComponent = Component.getComponent('Player');\n\n  player = new PlayerComponent(el, options, ready);\n\n  videojs.hooks('setup').forEach(function (hookFunction) {\n    return hookFunction(player);\n  });\n\n  return player;\n}\n\n/**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n */\nvideojs.hooks_ = {};\n\n/**\n * Get a list of hooks for a specific lifecycle\n * @function videojs.hooks\n *\n * @param {string} type\n *        the lifecyle to get hooks from\n *\n * @param {Function|Function[]} [fn]\n *        Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n *         an array of hooks, or an empty array if there are none.\n */\nvideojs.hooks = function (type, fn) {\n  videojs.hooks_[type] = videojs.hooks_[type] || [];\n  if (fn) {\n    videojs.hooks_[type] = videojs.hooks_[type].concat(fn);\n  }\n  return videojs.hooks_[type];\n};\n\n/**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\nvideojs.hook = function (type, fn) {\n  videojs.hooks(type, fn);\n};\n\n/**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\nvideojs.hookOnce = function (type, fn) {\n  videojs.hooks(type, [].concat(fn).map(function (original) {\n    var wrapper = function wrapper() {\n      videojs.removeHook(type, wrapper);\n      return original.apply(undefined, arguments);\n    };\n\n    return wrapper;\n  }));\n};\n\n/**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle that the function hooked to\n *\n * @param {Function} fn\n *        The hooked function to remove\n *\n * @return {boolean}\n *         The function that was removed or undef\n */\nvideojs.removeHook = function (type, fn) {\n  var index = videojs.hooks(type).indexOf(fn);\n\n  if (index <= -1) {\n    return false;\n  }\n\n  videojs.hooks_[type] = videojs.hooks_[type].slice();\n  videojs.hooks_[type].splice(index, 1);\n\n  return true;\n};\n\n// Add default styles\nif (window.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n  var style = $('.vjs-styles-defaults');\n\n  if (!style) {\n    style = createStyleElement('vjs-styles-defaults');\n    var head = $('head');\n\n    if (head) {\n      head.insertBefore(style, head.firstChild);\n    }\n    setTextContent(style, '\\n      .video-js {\\n        width: 300px;\\n        height: 150px;\\n      }\\n\\n      .vjs-fluid {\\n        padding-top: 56.25%\\n      }\\n    ');\n  }\n}\n\n// Run Auto-load players\n// You have to wait at least once in case this script is loaded after your\n// video in the DOM (weird behavior only with minified version)\nautoSetupTimeout(1, videojs);\n\n/**\n * Current software version. Follows semver.\n *\n * @type {string}\n */\nvideojs.VERSION = version;\n\n/**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\nvideojs.options = Player.prototype.options_;\n\n/**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n *         The created players\n */\nvideojs.getPlayers = function () {\n  return Player.players;\n};\n\n/**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param   {string|Element} id\n *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n *          or a string matching the `id` of such an element.\n *\n * @returns {Player|undefined}\n *          A player instance or `undefined` if there is no player instance\n *          matching the argument.\n */\nvideojs.getPlayer = function (id) {\n  var players = Player.players;\n  var tag = void 0;\n\n  if (typeof id === 'string') {\n    var nId = normalizeId(id);\n    var player = players[nId];\n\n    if (player) {\n      return player;\n    }\n\n    tag = $('#' + nId);\n  } else {\n    tag = id;\n  }\n\n  if (isEl(tag)) {\n    var _tag = tag,\n        _player = _tag.player,\n        playerId = _tag.playerId;\n\n    // Element may have a `player` property referring to an already created\n    // player instance. If so, return that.\n\n    if (_player || players[playerId]) {\n      return _player || players[playerId];\n    }\n  }\n};\n\n/**\n * Returns an array of all current players.\n *\n * @return {Array}\n *         An array of all players. The array will be in the order that\n *         `Object.keys` provides, which could potentially vary between\n *         JavaScript engines.\n *\n */\nvideojs.getAllPlayers = function () {\n  return (\n\n    // Disposed players leave a key with a `null` value, so we need to make sure\n    // we filter those out.\n    Object.keys(Player.players).map(function (k) {\n      return Player.players[k];\n    }).filter(Boolean)\n  );\n};\n\n/**\n * Expose players object.\n *\n * @memberOf videojs\n * @property {Object} players\n */\nvideojs.players = Player.players;\n\n/**\n * Get a component class object by name\n *\n * @borrows Component.getComponent as videojs.getComponent\n */\nvideojs.getComponent = Component.getComponent;\n\n/**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options  `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n *        The class name of the component\n *\n * @param {Component} comp\n *        The component class\n *\n * @return {Component}\n *         The newly registered component\n */\nvideojs.registerComponent = function (name$$1, comp) {\n  if (Tech.isTech(comp)) {\n    log.warn('The ' + name$$1 + ' tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)');\n  }\n\n  Component.registerComponent.call(Component, name$$1, comp);\n};\n\n/**\n * Get a Tech class object by name\n *\n * @borrows Tech.getTech as videojs.getTech\n */\nvideojs.getTech = Tech.getTech;\n\n/**\n * Register a Tech so it can referred to by name.\n * This is used in the tech order for the player.\n *\n * @borrows Tech.registerTech as videojs.registerTech\n */\nvideojs.registerTech = Tech.registerTech;\n\n/**\n * Register a middleware to a source type.\n *\n * @param {String} type A string representing a MIME type.\n * @param {function(player):object} middleware A middleware factory that takes a player.\n */\nvideojs.use = use;\n\n/**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @memberOf {videojs}\n * @property {object} middleware.TERMINATOR\n */\n// Object.defineProperty is not available in IE8\nif (!IS_IE8 && Object.defineProperty) {\n  Object.defineProperty(videojs, 'middleware', {\n    value: {},\n    writeable: false,\n    enumerable: true\n  });\n\n  Object.defineProperty(videojs.middleware, 'TERMINATOR', {\n    value: TERMINATOR,\n    writeable: false,\n    enumerable: true\n  });\n} else {\n  videojs.middleware = { TERMINATOR: TERMINATOR };\n}\n\n/**\n * A suite of browser and device tests from {@link browser}.\n *\n * @type {Object}\n * @private\n */\nvideojs.browser = browser;\n\n/**\n * Whether or not the browser supports touch events. Included for backward\n * compatibility with 4.x, but deprecated. Use `videojs.browser.TOUCH_ENABLED`\n * instead going forward.\n *\n * @deprecated since version 5.0\n * @type {boolean}\n */\nvideojs.TOUCH_ENABLED = TOUCH_ENABLED;\n\n/**\n * Subclass an existing class\n * Mimics ES6 subclassing with the `extend` keyword\n *\n * @borrows extend:extendFn as videojs.extend\n */\nvideojs.extend = extendFn;\n\n/**\n * Merge two options objects recursively\n * Performs a deep merge like lodash.merge but **only merges plain objects**\n * (not arrays, elements, anything else)\n * Other values will be copied directly from the second object.\n *\n * @borrows merge-options:mergeOptions as videojs.mergeOptions\n */\nvideojs.mergeOptions = mergeOptions;\n\n/**\n * Change the context (this) of a function\n *\n * > NOTE: as of v5.0 we require an ES5 shim, so you should use the native\n * `function() {}.bind(newContext);` instead of this.\n *\n * @borrows fn:bind as videojs.bind\n */\nvideojs.bind = bind;\n\n/**\n * Register a Video.js plugin.\n *\n * @borrows plugin:registerPlugin as videojs.registerPlugin\n * @method registerPlugin\n *\n * @param  {string} name\n *         The name of the plugin to be registered. Must be a string and\n *         must not match an existing plugin or a method on the `Player`\n *         prototype.\n *\n * @param  {Function} plugin\n *         A sub-class of `Plugin` or a function for basic plugins.\n *\n * @return {Function}\n *         For advanced plugins, a factory function for that plugin. For\n *         basic plugins, a wrapper function that initializes the plugin.\n */\nvideojs.registerPlugin = Plugin.registerPlugin;\n\n/**\n * Deregister a Video.js plugin.\n *\n * @borrows plugin:deregisterPlugin as videojs.deregisterPlugin\n * @method deregisterPlugin\n *\n * @param  {string} name\n *         The name of the plugin to be deregistered. Must be a string and\n *         must match an existing plugin or a method on the `Player`\n *         prototype.\n *\n */\nvideojs.deregisterPlugin = Plugin.deregisterPlugin;\n\n/**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated\n *        videojs.plugin() is deprecated; use videojs.registerPlugin() instead\n *\n * @param {string} name\n *        The plugin name\n *\n * @param {Plugin|Function} plugin\n *         The plugin sub-class or function\n */\nvideojs.plugin = function (name$$1, plugin) {\n  log.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n  return Plugin.registerPlugin(name$$1, plugin);\n};\n\n/**\n * Gets an object containing multiple Video.js plugins.\n *\n * @param  {Array} [names]\n *         If provided, should be an array of plugin names. Defaults to _all_\n *         plugin names.\n *\n * @return {Object|undefined}\n *         An object containing plugin(s) associated with their name(s) or\n *         `undefined` if no matching plugins exist).\n */\nvideojs.getPlugins = Plugin.getPlugins;\n\n/**\n * Gets a plugin by name if it exists.\n *\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {Function|undefined}\n *         The plugin (or `undefined`).\n */\nvideojs.getPlugin = Plugin.getPlugin;\n\n/**\n * Gets a plugin's version, if available\n *\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {string}\n *         The plugin's version or an empty string.\n */\nvideojs.getPluginVersion = Plugin.getPluginVersion;\n\n/**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n *        The language code or dictionary property\n *\n * @param {Object} data\n *        The data values to be translated\n *\n * @return {Object}\n *         The resulting language dictionary object\n */\nvideojs.addLanguage = function (code, data) {\n  var _mergeOptions;\n\n  code = ('' + code).toLowerCase();\n\n  videojs.options.languages = mergeOptions(videojs.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));\n\n  return videojs.options.languages[code];\n};\n\n/**\n * Log messages\n *\n * @borrows log:log as videojs.log\n */\nvideojs.log = log;\nvideojs.createLogger = createLogger;\n\n/**\n * Creates an emulated TimeRange object.\n *\n * @borrows time-ranges:createTimeRanges as videojs.createTimeRange\n */\n/**\n * @borrows time-ranges:createTimeRanges as videojs.createTimeRanges\n */\nvideojs.createTimeRange = videojs.createTimeRanges = createTimeRanges;\n\n/**\n * Format seconds as a time string, H:MM:SS or M:SS\n * Supplying a guide (in seconds) will force a number of leading zeros\n * to cover the length of the guide\n *\n * @borrows format-time:formatTime as videojs.formatTime\n */\nvideojs.formatTime = formatTime;\n\n/**\n * Replaces format-time with a custom implementation, to be used in place of the default.\n *\n * @borrows format-time:setFormatTime as videojs.setFormatTime\n *\n * @method setFormatTime\n *\n * @param {Function} customFn\n *        A custom format-time function which will be called with the current time and guide (in seconds) as arguments.\n *        Passed fn should return a string.\n */\nvideojs.setFormatTime = setFormatTime;\n\n/**\n * Resets format-time to the default implementation.\n *\n * @borrows format-time:resetFormatTime as videojs.resetFormatTime\n *\n * @method resetFormatTime\n */\nvideojs.resetFormatTime = resetFormatTime;\n\n/**\n * Resolve and parse the elements of a URL\n *\n * @borrows url:parseUrl as videojs.parseUrl\n *\n */\nvideojs.parseUrl = parseUrl;\n\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @borrows url:isCrossOrigin as videojs.isCrossOrigin\n */\nvideojs.isCrossOrigin = isCrossOrigin;\n\n/**\n * Event target class.\n *\n * @borrows EventTarget as videojs.EventTarget\n */\nvideojs.EventTarget = EventTarget;\n\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @borrows events:on as videojs.on\n */\nvideojs.on = on;\n\n/**\n * Trigger a listener only once for an event\n *\n * @borrows events:one as videojs.one\n */\nvideojs.one = one;\n\n/**\n * Removes event listeners from an element\n *\n * @borrows events:off as videojs.off\n */\nvideojs.off = off;\n\n/**\n * Trigger an event for an element\n *\n * @borrows events:trigger as videojs.trigger\n */\nvideojs.trigger = trigger;\n\n/**\n * A cross-browser XMLHttpRequest wrapper. Here's a simple example:\n *\n * @param {Object} options\n *        settings for the request.\n *\n * @return {XMLHttpRequest|XDomainRequest}\n *         The request object.\n *\n * @see https://github.com/Raynos/xhr\n */\nvideojs.xhr = xhr;\n\n/**\n * TextTrack class\n *\n * @borrows TextTrack as videojs.TextTrack\n */\nvideojs.TextTrack = TextTrack;\n\n/**\n * export the AudioTrack class so that source handlers can create\n * AudioTracks and then add them to the players AudioTrackList\n *\n * @borrows AudioTrack as videojs.AudioTrack\n */\nvideojs.AudioTrack = AudioTrack;\n\n/**\n * export the VideoTrack class so that source handlers can create\n * VideoTracks and then add them to the players VideoTrackList\n *\n * @borrows VideoTrack as videojs.VideoTrack\n */\nvideojs.VideoTrack = VideoTrack;\n\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @borrows dom:isEl as videojs.isEl\n * @deprecated Use videojs.dom.isEl() instead\n */\n\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @borrows dom:isTextNode as videojs.isTextNode\n * @deprecated Use videojs.dom.isTextNode() instead\n */\n\n/**\n * Creates an element and applies properties.\n *\n * @borrows dom:createEl as videojs.createEl\n * @deprecated Use videojs.dom.createEl() instead\n */\n\n/**\n * Check if an element has a CSS class\n *\n * @borrows dom:hasElClass as videojs.hasClass\n * @deprecated Use videojs.dom.hasClass() instead\n */\n\n/**\n * Add a CSS class name to an element\n *\n * @borrows dom:addElClass as videojs.addClass\n * @deprecated Use videojs.dom.addClass() instead\n */\n\n/**\n * Remove a CSS class name from an element\n *\n * @borrows dom:removeElClass as videojs.removeClass\n * @deprecated Use videojs.dom.removeClass() instead\n */\n\n/**\n * Adds or removes a CSS class name on an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @borrows dom:toggleElClass as videojs.toggleClass\n * @deprecated Use videojs.dom.toggleClass() instead\n */\n\n/**\n * Apply attributes to an HTML element.\n *\n * @borrows dom:setElAttributes as videojs.setAttribute\n * @deprecated Use videojs.dom.setAttributes() instead\n */\n\n/**\n * Get an element's attribute values, as defined on the HTML tag\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute (which shouldn't be used with HTML)\n * This will return true or false for boolean attributes.\n *\n * @borrows dom:getElAttributes as videojs.getAttributes\n * @deprecated Use videojs.dom.getAttributes() instead\n */\n\n/**\n * Empties the contents of an element.\n *\n * @borrows dom:emptyEl as videojs.emptyEl\n * @deprecated Use videojs.dom.emptyEl() instead\n */\n\n/**\n * Normalizes and appends content to an element.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * - String\n *   Normalized into a text node.\n *\n * - Element, TextNode\n *   Passed through.\n *\n * - Array\n *   A one-dimensional array of strings, elements, nodes, or functions (which\n *   return single strings, elements, or nodes).\n *\n * - Function\n *   If the sole argument, is expected to produce a string, element,\n *   node, or array.\n *\n * @borrows dom:appendContents as videojs.appendContet\n * @deprecated Use videojs.dom.appendContent() instead\n */\n\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * - String\n *   Normalized into a text node.\n *\n * - Element, TextNode\n *   Passed through.\n *\n * - Array\n *   A one-dimensional array of strings, elements, nodes, or functions (which\n *   return single strings, elements, or nodes).\n *\n * - Function\n *   If the sole argument, is expected to produce a string, element,\n *   node, or array.\n *\n * @borrows dom:insertContent as videojs.insertContent\n * @deprecated Use videojs.dom.insertContent() instead\n */\n['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {\n  videojs[k] = function () {\n    log.warn('videojs.' + k + '() is deprecated; use videojs.dom.' + k + '() instead');\n    return Dom[k].apply(null, arguments);\n  };\n});\n\n/**\n * A safe getComputedStyle with an IE8 fallback.\n *\n * This is because in Firefox, if the player is loaded in an iframe with `display:none`,\n * then `getComputedStyle` returns `null`, so, we do a null-check to make sure\n * that the player doesn't break in these cases.\n * See https://bugzilla.mozilla.org/show_bug.cgi?id=548397 for more details.\n *\n * @borrows computed-style:computedStyle as videojs.computedStyle\n */\nvideojs.computedStyle = computedStyle;\n\n/**\n * Export the Dom utilities for use in external plugins\n * and Tech's\n */\nvideojs.dom = Dom;\n\n/**\n * Export the Url utilities for use in external plugins\n * and Tech's\n */\nvideojs.url = Url;\n\nmodule.exports = videojs;\n","import computeOffsets from \"../utils/computeOffsets.js\";\n\nfunction popperOffsets(_ref) {\n  var state = _ref.state,\n      name = _ref.name;\n  // Offsets are the actual position the popper needs to have to be\n  // properly positioned near its reference element\n  // This is the most basic placement, and will be adjusted by\n  // the modifiers in the next step\n  state.modifiersData[name] = computeOffsets({\n    reference: state.rects.reference,\n    element: state.rects.popper,\n    strategy: 'absolute',\n    placement: state.placement\n  });\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'popperOffsets',\n  enabled: true,\n  phase: 'read',\n  fn: popperOffsets,\n  data: {}\n};","module.exports = {\n  tag: require('./flv-tag'),\n  Transmuxer: require('./transmuxer'),\n  getFlvHeader: require('./flv-header')\n};\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./evpkdf\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./enc-base64\", \"./md5\", \"./evpkdf\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var StreamCipher = C_lib.StreamCipher;\n\t    var C_algo = C.algo;\n\n\t    // Reusable objects\n\t    var S  = [];\n\t    var C_ = [];\n\t    var G  = [];\n\n\t    /**\n\t     * Rabbit stream cipher algorithm\n\t     */\n\t    var Rabbit = C_algo.Rabbit = StreamCipher.extend({\n\t        _doReset: function () {\n\t            // Shortcuts\n\t            var K = this._key.words;\n\t            var iv = this.cfg.iv;\n\n\t            // Swap endian\n\t            for (var i = 0; i < 4; i++) {\n\t                K[i] = (((K[i] << 8)  | (K[i] >>> 24)) & 0x00ff00ff) |\n\t                       (((K[i] << 24) | (K[i] >>> 8))  & 0xff00ff00);\n\t            }\n\n\t            // Generate initial state values\n\t            var X = this._X = [\n\t                K[0], (K[3] << 16) | (K[2] >>> 16),\n\t                K[1], (K[0] << 16) | (K[3] >>> 16),\n\t                K[2], (K[1] << 16) | (K[0] >>> 16),\n\t                K[3], (K[2] << 16) | (K[1] >>> 16)\n\t            ];\n\n\t            // Generate initial counter values\n\t            var C = this._C = [\n\t                (K[2] << 16) | (K[2] >>> 16), (K[0] & 0xffff0000) | (K[1] & 0x0000ffff),\n\t                (K[3] << 16) | (K[3] >>> 16), (K[1] & 0xffff0000) | (K[2] & 0x0000ffff),\n\t                (K[0] << 16) | (K[0] >>> 16), (K[2] & 0xffff0000) | (K[3] & 0x0000ffff),\n\t                (K[1] << 16) | (K[1] >>> 16), (K[3] & 0xffff0000) | (K[0] & 0x0000ffff)\n\t            ];\n\n\t            // Carry bit\n\t            this._b = 0;\n\n\t            // Iterate the system four times\n\t            for (var i = 0; i < 4; i++) {\n\t                nextState.call(this);\n\t            }\n\n\t            // Modify the counters\n\t            for (var i = 0; i < 8; i++) {\n\t                C[i] ^= X[(i + 4) & 7];\n\t            }\n\n\t            // IV setup\n\t            if (iv) {\n\t                // Shortcuts\n\t                var IV = iv.words;\n\t                var IV_0 = IV[0];\n\t                var IV_1 = IV[1];\n\n\t                // Generate four subvectors\n\t                var i0 = (((IV_0 << 8) | (IV_0 >>> 24)) & 0x00ff00ff) | (((IV_0 << 24) | (IV_0 >>> 8)) & 0xff00ff00);\n\t                var i2 = (((IV_1 << 8) | (IV_1 >>> 24)) & 0x00ff00ff) | (((IV_1 << 24) | (IV_1 >>> 8)) & 0xff00ff00);\n\t                var i1 = (i0 >>> 16) | (i2 & 0xffff0000);\n\t                var i3 = (i2 << 16)  | (i0 & 0x0000ffff);\n\n\t                // Modify counter values\n\t                C[0] ^= i0;\n\t                C[1] ^= i1;\n\t                C[2] ^= i2;\n\t                C[3] ^= i3;\n\t                C[4] ^= i0;\n\t                C[5] ^= i1;\n\t                C[6] ^= i2;\n\t                C[7] ^= i3;\n\n\t                // Iterate the system four times\n\t                for (var i = 0; i < 4; i++) {\n\t                    nextState.call(this);\n\t                }\n\t            }\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Shortcut\n\t            var X = this._X;\n\n\t            // Iterate the system\n\t            nextState.call(this);\n\n\t            // Generate four keystream words\n\t            S[0] = X[0] ^ (X[5] >>> 16) ^ (X[3] << 16);\n\t            S[1] = X[2] ^ (X[7] >>> 16) ^ (X[5] << 16);\n\t            S[2] = X[4] ^ (X[1] >>> 16) ^ (X[7] << 16);\n\t            S[3] = X[6] ^ (X[3] >>> 16) ^ (X[1] << 16);\n\n\t            for (var i = 0; i < 4; i++) {\n\t                // Swap endian\n\t                S[i] = (((S[i] << 8)  | (S[i] >>> 24)) & 0x00ff00ff) |\n\t                       (((S[i] << 24) | (S[i] >>> 8))  & 0xff00ff00);\n\n\t                // Encrypt\n\t                M[offset + i] ^= S[i];\n\t            }\n\t        },\n\n\t        blockSize: 128/32,\n\n\t        ivSize: 64/32\n\t    });\n\n\t    function nextState() {\n\t        // Shortcuts\n\t        var X = this._X;\n\t        var C = this._C;\n\n\t        // Save old counter values\n\t        for (var i = 0; i < 8; i++) {\n\t            C_[i] = C[i];\n\t        }\n\n\t        // Calculate new counter values\n\t        C[0] = (C[0] + 0x4d34d34d + this._b) | 0;\n\t        C[1] = (C[1] + 0xd34d34d3 + ((C[0] >>> 0) < (C_[0] >>> 0) ? 1 : 0)) | 0;\n\t        C[2] = (C[2] + 0x34d34d34 + ((C[1] >>> 0) < (C_[1] >>> 0) ? 1 : 0)) | 0;\n\t        C[3] = (C[3] + 0x4d34d34d + ((C[2] >>> 0) < (C_[2] >>> 0) ? 1 : 0)) | 0;\n\t        C[4] = (C[4] + 0xd34d34d3 + ((C[3] >>> 0) < (C_[3] >>> 0) ? 1 : 0)) | 0;\n\t        C[5] = (C[5] + 0x34d34d34 + ((C[4] >>> 0) < (C_[4] >>> 0) ? 1 : 0)) | 0;\n\t        C[6] = (C[6] + 0x4d34d34d + ((C[5] >>> 0) < (C_[5] >>> 0) ? 1 : 0)) | 0;\n\t        C[7] = (C[7] + 0xd34d34d3 + ((C[6] >>> 0) < (C_[6] >>> 0) ? 1 : 0)) | 0;\n\t        this._b = (C[7] >>> 0) < (C_[7] >>> 0) ? 1 : 0;\n\n\t        // Calculate the g-values\n\t        for (var i = 0; i < 8; i++) {\n\t            var gx = X[i] + C[i];\n\n\t            // Construct high and low argument for squaring\n\t            var ga = gx & 0xffff;\n\t            var gb = gx >>> 16;\n\n\t            // Calculate high and low result of squaring\n\t            var gh = ((((ga * ga) >>> 17) + ga * gb) >>> 15) + gb * gb;\n\t            var gl = (((gx & 0xffff0000) * gx) | 0) + (((gx & 0x0000ffff) * gx) | 0);\n\n\t            // High XOR low\n\t            G[i] = gh ^ gl;\n\t        }\n\n\t        // Calculate new state values\n\t        X[0] = (G[0] + ((G[7] << 16) | (G[7] >>> 16)) + ((G[6] << 16) | (G[6] >>> 16))) | 0;\n\t        X[1] = (G[1] + ((G[0] << 8)  | (G[0] >>> 24)) + G[7]) | 0;\n\t        X[2] = (G[2] + ((G[1] << 16) | (G[1] >>> 16)) + ((G[0] << 16) | (G[0] >>> 16))) | 0;\n\t        X[3] = (G[3] + ((G[2] << 8)  | (G[2] >>> 24)) + G[1]) | 0;\n\t        X[4] = (G[4] + ((G[3] << 16) | (G[3] >>> 16)) + ((G[2] << 16) | (G[2] >>> 16))) | 0;\n\t        X[5] = (G[5] + ((G[4] << 8)  | (G[4] >>> 24)) + G[3]) | 0;\n\t        X[6] = (G[6] + ((G[5] << 16) | (G[5] >>> 16)) + ((G[4] << 16) | (G[4] >>> 16))) | 0;\n\t        X[7] = (G[7] + ((G[6] << 8)  | (G[6] >>> 24)) + G[5]) | 0;\n\t    }\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.Rabbit.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.Rabbit.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.Rabbit = StreamCipher._createHelper(Rabbit);\n\t}());\n\n\n\treturn CryptoJS.Rabbit;\n\n}));","'use strict';\n\nvar utils = require('../utils');\nvar common = require('../common');\nvar shaCommon = require('./common');\n\nvar rotl32 = utils.rotl32;\nvar sum32 = utils.sum32;\nvar sum32_5 = utils.sum32_5;\nvar ft_1 = shaCommon.ft_1;\nvar BlockHash = common.BlockHash;\n\nvar sha1_K = [\n  0x5A827999, 0x6ED9EBA1,\n  0x8F1BBCDC, 0xCA62C1D6\n];\n\nfunction SHA1() {\n  if (!(this instanceof SHA1))\n    return new SHA1();\n\n  BlockHash.call(this);\n  this.h = [\n    0x67452301, 0xefcdab89, 0x98badcfe,\n    0x10325476, 0xc3d2e1f0 ];\n  this.W = new Array(80);\n}\n\nutils.inherits(SHA1, BlockHash);\nmodule.exports = SHA1;\n\nSHA1.blockSize = 512;\nSHA1.outSize = 160;\nSHA1.hmacStrength = 80;\nSHA1.padLength = 64;\n\nSHA1.prototype._update = function _update(msg, start) {\n  var W = this.W;\n\n  for (var i = 0; i < 16; i++)\n    W[i] = msg[start + i];\n\n  for(; i < W.length; i++)\n    W[i] = rotl32(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16], 1);\n\n  var a = this.h[0];\n  var b = this.h[1];\n  var c = this.h[2];\n  var d = this.h[3];\n  var e = this.h[4];\n\n  for (i = 0; i < W.length; i++) {\n    var s = ~~(i / 20);\n    var t = sum32_5(rotl32(a, 5), ft_1(s, b, c, d), e, W[i], sha1_K[s]);\n    e = d;\n    d = c;\n    c = rotl32(b, 30);\n    b = a;\n    a = t;\n  }\n\n  this.h[0] = sum32(this.h[0], a);\n  this.h[1] = sum32(this.h[1], b);\n  this.h[2] = sum32(this.h[2], c);\n  this.h[3] = sum32(this.h[3], d);\n  this.h[4] = sum32(this.h[4], e);\n};\n\nSHA1.prototype._digest = function digest(enc) {\n  if (enc === 'hex')\n    return utils.toHex32(this.h, 'big');\n  else\n    return utils.split32(this.h, 'big');\n};\n","'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar defaultOptions = {\n  errorInterval: 30,\n  getSource: function getSource(next) {\n    var tech = this.tech({ IWillNotUseThisInPlugins: true });\n    var sourceObj = tech.currentSource_;\n\n    return next(sourceObj);\n  }\n};\n\n/**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\nvar initPlugin = function initPlugin(player, options) {\n  var lastCalled = 0;\n  var seekTo = 0;\n  var localOptions = _videoJs2['default'].mergeOptions(defaultOptions, options);\n\n  player.ready(function () {\n    player.trigger({ type: 'usage', name: 'hls-error-reload-initialized' });\n  });\n\n  /**\n   * Player modifications to perform that must wait until `loadedmetadata`\n   * has been triggered\n   *\n   * @private\n   */\n  var loadedMetadataHandler = function loadedMetadataHandler() {\n    if (seekTo) {\n      player.currentTime(seekTo);\n    }\n  };\n\n  /**\n   * Set the source on the player element, play, and seek if necessary\n   *\n   * @param {Object} sourceObj An object specifying the source url and mime-type to play\n   * @private\n   */\n  var setSource = function setSource(sourceObj) {\n    if (sourceObj === null || sourceObj === undefined) {\n      return;\n    }\n    seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n\n    player.one('loadedmetadata', loadedMetadataHandler);\n\n    player.src(sourceObj);\n    player.trigger({ type: 'usage', name: 'hls-error-reload' });\n    player.play();\n  };\n\n  /**\n   * Attempt to get a source from either the built-in getSource function\n   * or a custom function provided via the options\n   *\n   * @private\n   */\n  var errorHandler = function errorHandler() {\n    // Do not attempt to reload the source if a source-reload occurred before\n    // 'errorInterval' time has elapsed since the last source-reload\n    if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n      player.trigger({ type: 'usage', name: 'hls-error-reload-canceled' });\n      return;\n    }\n\n    if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n      _videoJs2['default'].log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n      return;\n    }\n    lastCalled = Date.now();\n\n    return localOptions.getSource.call(player, setSource);\n  };\n\n  /**\n   * Unbind any event handlers that were bound by the plugin\n   *\n   * @private\n   */\n  var cleanupEvents = function cleanupEvents() {\n    player.off('loadedmetadata', loadedMetadataHandler);\n    player.off('error', errorHandler);\n    player.off('dispose', cleanupEvents);\n  };\n\n  /**\n   * Cleanup before re-initializing the plugin\n   *\n   * @param {Object} [newOptions] an object with plugin options\n   * @private\n   */\n  var reinitPlugin = function reinitPlugin(newOptions) {\n    cleanupEvents();\n    initPlugin(player, newOptions);\n  };\n\n  player.on('error', errorHandler);\n  player.on('dispose', cleanupEvents);\n\n  // Overwrite the plugin function so that we can correctly cleanup before\n  // initializing the plugin\n  player.reloadSourceOnError = reinitPlugin;\n};\n\n/**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\nvar reloadSourceOnError = function reloadSourceOnError(options) {\n  initPlugin(this, options);\n};\n\nexports['default'] = reloadSourceOnError;\nmodule.exports = exports['default'];","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\nvar _objCreate = Object.create || (function() {\n  function F() {}\n  return function(o) {\n    if (arguments.length !== 1) {\n      throw new Error('Object.create shim only accepts one parameter.');\n    }\n    F.prototype = o;\n    return new F();\n  };\n})();\n\n// Creates a new ParserError object from an errorData object. The errorData\n// object should have default code and message properties. The default message\n// property can be overriden by passing in a message parameter.\n// See ParsingError.Errors below for acceptable errors.\nfunction ParsingError(errorData, message) {\n  this.name = \"ParsingError\";\n  this.code = errorData.code;\n  this.message = message || errorData.message;\n}\nParsingError.prototype = _objCreate(Error.prototype);\nParsingError.prototype.constructor = ParsingError;\n\n// ParsingError metadata for acceptable ParsingErrors.\nParsingError.Errors = {\n  BadSignature: {\n    code: 0,\n    message: \"Malformed WebVTT signature.\"\n  },\n  BadTimeStamp: {\n    code: 1,\n    message: \"Malformed time stamp.\"\n  }\n};\n\n// Try to parse input as a time stamp.\nfunction parseTimeStamp(input) {\n\n  function computeSeconds(h, m, s, f) {\n    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n  }\n\n  var m = input.match(/^(\\d+):(\\d{2})(:\\d{2})?\\.(\\d{3})/);\n  if (!m) {\n    return null;\n  }\n\n  if (m[3]) {\n    // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n    return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n  } else if (m[1] > 59) {\n    // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n    // First position is hours as it's over 59.\n    return computeSeconds(m[1], m[2], 0,  m[4]);\n  } else {\n    // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n    return computeSeconds(0, m[1], m[2], m[4]);\n  }\n}\n\n// A settings object holds key/value pairs and will ignore anything but the first\n// assignment to a specific key.\nfunction Settings() {\n  this.values = _objCreate(null);\n}\n\nSettings.prototype = {\n  // Only accept the first assignment to any key.\n  set: function(k, v) {\n    if (!this.get(k) && v !== \"\") {\n      this.values[k] = v;\n    }\n  },\n  // Return the value for a key, or a default value.\n  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n  // a number of possible default values as properties where 'defaultKey' is\n  // the key of the property that will be chosen; otherwise it's assumed to be\n  // a single value.\n  get: function(k, dflt, defaultKey) {\n    if (defaultKey) {\n      return this.has(k) ? this.values[k] : dflt[defaultKey];\n    }\n    return this.has(k) ? this.values[k] : dflt;\n  },\n  // Check whether we have a value for a key.\n  has: function(k) {\n    return k in this.values;\n  },\n  // Accept a setting if its one of the given alternatives.\n  alt: function(k, v, a) {\n    for (var n = 0; n < a.length; ++n) {\n      if (v === a[n]) {\n        this.set(k, v);\n        break;\n      }\n    }\n  },\n  // Accept a setting if its a valid (signed) integer.\n  integer: function(k, v) {\n    if (/^-?\\d+$/.test(v)) { // integer\n      this.set(k, parseInt(v, 10));\n    }\n  },\n  // Accept a setting if its a valid percentage.\n  percent: function(k, v) {\n    var m;\n    if ((m = v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/))) {\n      v = parseFloat(v);\n      if (v >= 0 && v <= 100) {\n        this.set(k, v);\n        return true;\n      }\n    }\n    return false;\n  }\n};\n\n// Helper function to parse input into groups separated by 'groupDelim', and\n// interprete each group as a key/value pair separated by 'keyValueDelim'.\nfunction parseOptions(input, callback, keyValueDelim, groupDelim) {\n  var groups = groupDelim ? input.split(groupDelim) : [input];\n  for (var i in groups) {\n    if (typeof groups[i] !== \"string\") {\n      continue;\n    }\n    var kv = groups[i].split(keyValueDelim);\n    if (kv.length !== 2) {\n      continue;\n    }\n    var k = kv[0];\n    var v = kv[1];\n    callback(k, v);\n  }\n}\n\nfunction parseCue(input, cue, regionList) {\n  // Remember the original input if we need to throw an error.\n  var oInput = input;\n  // 4.1 WebVTT timestamp\n  function consumeTimeStamp() {\n    var ts = parseTimeStamp(input);\n    if (ts === null) {\n      throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                            \"Malformed timestamp: \" + oInput);\n    }\n    // Remove time stamp from input.\n    input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n    return ts;\n  }\n\n  // 4.4.2 WebVTT cue settings\n  function consumeCueSettings(input, cue) {\n    var settings = new Settings();\n\n    parseOptions(input, function (k, v) {\n      switch (k) {\n      case \"region\":\n        // Find the last region we parsed with the same region id.\n        for (var i = regionList.length - 1; i >= 0; i--) {\n          if (regionList[i].id === v) {\n            settings.set(k, regionList[i].region);\n            break;\n          }\n        }\n        break;\n      case \"vertical\":\n        settings.alt(k, v, [\"rl\", \"lr\"]);\n        break;\n      case \"line\":\n        var vals = v.split(\",\"),\n            vals0 = vals[0];\n        settings.integer(k, vals0);\n        settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n        settings.alt(k, vals0, [\"auto\"]);\n        if (vals.length === 2) {\n          settings.alt(\"lineAlign\", vals[1], [\"start\", \"middle\", \"end\"]);\n        }\n        break;\n      case \"position\":\n        vals = v.split(\",\");\n        settings.percent(k, vals[0]);\n        if (vals.length === 2) {\n          settings.alt(\"positionAlign\", vals[1], [\"start\", \"middle\", \"end\"]);\n        }\n        break;\n      case \"size\":\n        settings.percent(k, v);\n        break;\n      case \"align\":\n        settings.alt(k, v, [\"start\", \"middle\", \"end\", \"left\", \"right\"]);\n        break;\n      }\n    }, /:/, /\\s/);\n\n    // Apply default values for any missing fields.\n    cue.region = settings.get(\"region\", null);\n    cue.vertical = settings.get(\"vertical\", \"\");\n    cue.line = settings.get(\"line\", \"auto\");\n    cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n    cue.snapToLines = settings.get(\"snapToLines\", true);\n    cue.size = settings.get(\"size\", 100);\n    cue.align = settings.get(\"align\", \"middle\");\n    cue.position = settings.get(\"position\", {\n      start: 0,\n      left: 0,\n      middle: 50,\n      end: 100,\n      right: 100\n    }, cue.align);\n    cue.positionAlign = settings.get(\"positionAlign\", {\n      start: \"start\",\n      left: \"start\",\n      middle: \"middle\",\n      end: \"end\",\n      right: \"end\"\n    }, cue.align);\n  }\n\n  function skipWhitespace() {\n    input = input.replace(/^\\s+/, \"\");\n  }\n\n  // 4.1 WebVTT cue timings.\n  skipWhitespace();\n  cue.startTime = consumeTimeStamp();   // (1) collect cue start time\n  skipWhitespace();\n  if (input.substr(0, 3) !== \"-->\") {     // (3) next characters must match \"-->\"\n    throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                           \"Malformed time stamp (time stamps must be separated by '-->'): \" +\n                           oInput);\n  }\n  input = input.substr(3);\n  skipWhitespace();\n  cue.endTime = consumeTimeStamp();     // (5) collect cue end time\n\n  // 4.1 WebVTT cue settings list.\n  skipWhitespace();\n  consumeCueSettings(input, cue);\n}\n\nvar ESCAPE = {\n  \"&amp;\": \"&\",\n  \"&lt;\": \"<\",\n  \"&gt;\": \">\",\n  \"&lrm;\": \"\\u200e\",\n  \"&rlm;\": \"\\u200f\",\n  \"&nbsp;\": \"\\u00a0\"\n};\n\nvar TAG_NAME = {\n  c: \"span\",\n  i: \"i\",\n  b: \"b\",\n  u: \"u\",\n  ruby: \"ruby\",\n  rt: \"rt\",\n  v: \"span\",\n  lang: \"span\"\n};\n\nvar TAG_ANNOTATION = {\n  v: \"title\",\n  lang: \"lang\"\n};\n\nvar NEEDS_PARENT = {\n  rt: \"ruby\"\n};\n\n// Parse content into a document fragment.\nfunction parseContent(window, input) {\n  function nextToken() {\n    // Check for end-of-string.\n    if (!input) {\n      return null;\n    }\n\n    // Consume 'n' characters from the input.\n    function consume(result) {\n      input = input.substr(result.length);\n      return result;\n    }\n\n    var m = input.match(/^([^<]*)(<[^>]*>?)?/);\n    // If there is some text before the next tag, return it, otherwise return\n    // the tag.\n    return consume(m[1] ? m[1] : m[2]);\n  }\n\n  // Unescape a string 's'.\n  function unescape1(e) {\n    return ESCAPE[e];\n  }\n  function unescape(s) {\n    while ((m = s.match(/&(amp|lt|gt|lrm|rlm|nbsp);/))) {\n      s = s.replace(m[0], unescape1);\n    }\n    return s;\n  }\n\n  function shouldAdd(current, element) {\n    return !NEEDS_PARENT[element.localName] ||\n           NEEDS_PARENT[element.localName] === current.localName;\n  }\n\n  // Create an element for this tag.\n  function createElement(type, annotation) {\n    var tagName = TAG_NAME[type];\n    if (!tagName) {\n      return null;\n    }\n    var element = window.document.createElement(tagName);\n    element.localName = tagName;\n    var name = TAG_ANNOTATION[type];\n    if (name && annotation) {\n      element[name] = annotation.trim();\n    }\n    return element;\n  }\n\n  var rootDiv = window.document.createElement(\"div\"),\n      current = rootDiv,\n      t,\n      tagStack = [];\n\n  while ((t = nextToken()) !== null) {\n    if (t[0] === '<') {\n      if (t[1] === \"/\") {\n        // If the closing tag matches, move back up to the parent node.\n        if (tagStack.length &&\n            tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n          tagStack.pop();\n          current = current.parentNode;\n        }\n        // Otherwise just ignore the end tag.\n        continue;\n      }\n      var ts = parseTimeStamp(t.substr(1, t.length - 2));\n      var node;\n      if (ts) {\n        // Timestamps are lead nodes as well.\n        node = window.document.createProcessingInstruction(\"timestamp\", ts);\n        current.appendChild(node);\n        continue;\n      }\n      var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/);\n      // If we can't parse the tag, skip to the next tag.\n      if (!m) {\n        continue;\n      }\n      // Try to construct an element, and ignore the tag if we couldn't.\n      node = createElement(m[1], m[3]);\n      if (!node) {\n        continue;\n      }\n      // Determine if the tag should be added based on the context of where it\n      // is placed in the cuetext.\n      if (!shouldAdd(current, node)) {\n        continue;\n      }\n      // Set the class list (as a list of classes, separated by space).\n      if (m[2]) {\n        node.className = m[2].substr(1).replace('.', ' ');\n      }\n      // Append the node to the current node, and enter the scope of the new\n      // node.\n      tagStack.push(m[1]);\n      current.appendChild(node);\n      current = node;\n      continue;\n    }\n\n    // Text nodes are leaf nodes.\n    current.appendChild(window.document.createTextNode(unescape(t)));\n  }\n\n  return rootDiv;\n}\n\n// This is a list of all the Unicode characters that have a strong\n// right-to-left category. What this means is that these characters are\n// written right-to-left for sure. It was generated by pulling all the strong\n// right-to-left characters out of the Unicode data table. That table can\n// found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\nvar strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6],\n [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d],\n [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6],\n [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5],\n [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815],\n [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858],\n [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f],\n [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c],\n [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1],\n [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc],\n [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808],\n [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855],\n [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f],\n [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13],\n [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58],\n [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72],\n [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f],\n [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32],\n [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42],\n [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f],\n [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59],\n [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62],\n [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77],\n [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b],\n [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n\nfunction isStrongRTLChar(charCode) {\n  for (var i = 0; i < strongRTLRanges.length; i++) {\n    var currentRange = strongRTLRanges[i];\n    if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction determineBidi(cueDiv) {\n  var nodeStack = [],\n      text = \"\",\n      charCode;\n\n  if (!cueDiv || !cueDiv.childNodes) {\n    return \"ltr\";\n  }\n\n  function pushNodes(nodeStack, node) {\n    for (var i = node.childNodes.length - 1; i >= 0; i--) {\n      nodeStack.push(node.childNodes[i]);\n    }\n  }\n\n  function nextTextNode(nodeStack) {\n    if (!nodeStack || !nodeStack.length) {\n      return null;\n    }\n\n    var node = nodeStack.pop(),\n        text = node.textContent || node.innerText;\n    if (text) {\n      // TODO: This should match all unicode type B characters (paragraph\n      // separator characters). See issue #115.\n      var m = text.match(/^.*(\\n|\\r)/);\n      if (m) {\n        nodeStack.length = 0;\n        return m[0];\n      }\n      return text;\n    }\n    if (node.tagName === \"ruby\") {\n      return nextTextNode(nodeStack);\n    }\n    if (node.childNodes) {\n      pushNodes(nodeStack, node);\n      return nextTextNode(nodeStack);\n    }\n  }\n\n  pushNodes(nodeStack, cueDiv);\n  while ((text = nextTextNode(nodeStack))) {\n    for (var i = 0; i < text.length; i++) {\n      charCode = text.charCodeAt(i);\n      if (isStrongRTLChar(charCode)) {\n        return \"rtl\";\n      }\n    }\n  }\n  return \"ltr\";\n}\n\nfunction computeLinePos(cue) {\n  if (typeof cue.line === \"number\" &&\n      (cue.snapToLines || (cue.line >= 0 && cue.line <= 100))) {\n    return cue.line;\n  }\n  if (!cue.track || !cue.track.textTrackList ||\n      !cue.track.textTrackList.mediaElement) {\n    return -1;\n  }\n  var track = cue.track,\n      trackList = track.textTrackList,\n      count = 0;\n  for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n    if (trackList[i].mode === \"showing\") {\n      count++;\n    }\n  }\n  return ++count * -1;\n}\n\nfunction StyleBox() {\n}\n\n// Apply styles to a div. If there is no div passed then it defaults to the\n// div on 'this'.\nStyleBox.prototype.applyStyles = function(styles, div) {\n  div = div || this.div;\n  for (var prop in styles) {\n    if (styles.hasOwnProperty(prop)) {\n      div.style[prop] = styles[prop];\n    }\n  }\n};\n\nStyleBox.prototype.formatStyle = function(val, unit) {\n  return val === 0 ? 0 : val + unit;\n};\n\n// Constructs the computed display state of the cue (a div). Places the div\n// into the overlay which should be a block level element (usually a div).\nfunction CueStyleBox(window, cue, styleOptions) {\n  var isIE8 = (/MSIE\\s8\\.0/).test(navigator.userAgent);\n  var color = \"rgba(255, 255, 255, 1)\";\n  var backgroundColor = \"rgba(0, 0, 0, 0.8)\";\n\n  if (isIE8) {\n    color = \"rgb(255, 255, 255)\";\n    backgroundColor = \"rgb(0, 0, 0)\";\n  }\n\n  StyleBox.call(this);\n  this.cue = cue;\n\n  // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n  // have inline positioning and will function as the cue background box.\n  this.cueDiv = parseContent(window, cue.text);\n  var styles = {\n    color: color,\n    backgroundColor: backgroundColor,\n    position: \"relative\",\n    left: 0,\n    right: 0,\n    top: 0,\n    bottom: 0,\n    display: \"inline\"\n  };\n\n  if (!isIE8) {\n    styles.writingMode = cue.vertical === \"\" ? \"horizontal-tb\"\n                                             : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                                     : \"vertical-rl\";\n    styles.unicodeBidi = \"plaintext\";\n  }\n  this.applyStyles(styles, this.cueDiv);\n\n  // Create an absolutely positioned div that will be used to position the cue\n  // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n  // mirrors of them except \"middle\" which is \"center\" in CSS.\n  this.div = window.document.createElement(\"div\");\n  styles = {\n    textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n    font: styleOptions.font,\n    whiteSpace: \"pre-line\",\n    position: \"absolute\"\n  };\n\n  if (!isIE8) {\n    styles.direction = determineBidi(this.cueDiv);\n    styles.writingMode = cue.vertical === \"\" ? \"horizontal-tb\"\n                                             : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                                     : \"vertical-rl\".\n    stylesunicodeBidi =  \"plaintext\";\n  }\n\n  this.applyStyles(styles);\n\n  this.div.appendChild(this.cueDiv);\n\n  // Calculate the distance from the reference edge of the viewport to the text\n  // position of the cue box. The reference edge will be resolved later when\n  // the box orientation styles are applied.\n  var textPos = 0;\n  switch (cue.positionAlign) {\n  case \"start\":\n    textPos = cue.position;\n    break;\n  case \"middle\":\n    textPos = cue.position - (cue.size / 2);\n    break;\n  case \"end\":\n    textPos = cue.position - cue.size;\n    break;\n  }\n\n  // Horizontal box orientation; textPos is the distance from the left edge of the\n  // area to the left edge of the box and cue.size is the distance extending to\n  // the right from there.\n  if (cue.vertical === \"\") {\n    this.applyStyles({\n      left:  this.formatStyle(textPos, \"%\"),\n      width: this.formatStyle(cue.size, \"%\")\n    });\n  // Vertical box orientation; textPos is the distance from the top edge of the\n  // area to the top edge of the box and cue.size is the height extending\n  // downwards from there.\n  } else {\n    this.applyStyles({\n      top: this.formatStyle(textPos, \"%\"),\n      height: this.formatStyle(cue.size, \"%\")\n    });\n  }\n\n  this.move = function(box) {\n    this.applyStyles({\n      top: this.formatStyle(box.top, \"px\"),\n      bottom: this.formatStyle(box.bottom, \"px\"),\n      left: this.formatStyle(box.left, \"px\"),\n      right: this.formatStyle(box.right, \"px\"),\n      height: this.formatStyle(box.height, \"px\"),\n      width: this.formatStyle(box.width, \"px\")\n    });\n  };\n}\nCueStyleBox.prototype = _objCreate(StyleBox.prototype);\nCueStyleBox.prototype.constructor = CueStyleBox;\n\n// Represents the co-ordinates of an Element in a way that we can easily\n// compute things with such as if it overlaps or intersects with another Element.\n// Can initialize it with either a StyleBox or another BoxPosition.\nfunction BoxPosition(obj) {\n  var isIE8 = (/MSIE\\s8\\.0/).test(navigator.userAgent);\n\n  // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n  // was passed in and we need to copy the results of 'getBoundingClientRect'\n  // as the object returned is readonly. All co-ordinate values are in reference\n  // to the viewport origin (top left).\n  var lh, height, width, top;\n  if (obj.div) {\n    height = obj.div.offsetHeight;\n    width = obj.div.offsetWidth;\n    top = obj.div.offsetTop;\n\n    var rects = (rects = obj.div.childNodes) && (rects = rects[0]) &&\n                rects.getClientRects && rects.getClientRects();\n    obj = obj.div.getBoundingClientRect();\n    // In certain cases the outter div will be slightly larger then the sum of\n    // the inner div's lines. This could be due to bold text, etc, on some platforms.\n    // In this case we should get the average line height and use that. This will\n    // result in the desired behaviour.\n    lh = rects ? Math.max((rects[0] && rects[0].height) || 0, obj.height / rects.length)\n               : 0;\n\n  }\n  this.left = obj.left;\n  this.right = obj.right;\n  this.top = obj.top || top;\n  this.height = obj.height || height;\n  this.bottom = obj.bottom || (top + (obj.height || height));\n  this.width = obj.width || width;\n  this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n\n  if (isIE8 && !this.lineHeight) {\n    this.lineHeight = 13;\n  }\n}\n\n// Move the box along a particular axis. Optionally pass in an amount to move\n// the box. If no amount is passed then the default is the line height of the\n// box.\nBoxPosition.prototype.move = function(axis, toMove) {\n  toMove = toMove !== undefined ? toMove : this.lineHeight;\n  switch (axis) {\n  case \"+x\":\n    this.left += toMove;\n    this.right += toMove;\n    break;\n  case \"-x\":\n    this.left -= toMove;\n    this.right -= toMove;\n    break;\n  case \"+y\":\n    this.top += toMove;\n    this.bottom += toMove;\n    break;\n  case \"-y\":\n    this.top -= toMove;\n    this.bottom -= toMove;\n    break;\n  }\n};\n\n// Check if this box overlaps another box, b2.\nBoxPosition.prototype.overlaps = function(b2) {\n  return this.left < b2.right &&\n         this.right > b2.left &&\n         this.top < b2.bottom &&\n         this.bottom > b2.top;\n};\n\n// Check if this box overlaps any other boxes in boxes.\nBoxPosition.prototype.overlapsAny = function(boxes) {\n  for (var i = 0; i < boxes.length; i++) {\n    if (this.overlaps(boxes[i])) {\n      return true;\n    }\n  }\n  return false;\n};\n\n// Check if this box is within another box.\nBoxPosition.prototype.within = function(container) {\n  return this.top >= container.top &&\n         this.bottom <= container.bottom &&\n         this.left >= container.left &&\n         this.right <= container.right;\n};\n\n// Check if this box is entirely within the container or it is overlapping\n// on the edge opposite of the axis direction passed. For example, if \"+x\" is\n// passed and the box is overlapping on the left edge of the container, then\n// return true.\nBoxPosition.prototype.overlapsOppositeAxis = function(container, axis) {\n  switch (axis) {\n  case \"+x\":\n    return this.left < container.left;\n  case \"-x\":\n    return this.right > container.right;\n  case \"+y\":\n    return this.top < container.top;\n  case \"-y\":\n    return this.bottom > container.bottom;\n  }\n};\n\n// Find the percentage of the area that this box is overlapping with another\n// box.\nBoxPosition.prototype.intersectPercentage = function(b2) {\n  var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n      intersectArea = x * y;\n  return intersectArea / (this.height * this.width);\n};\n\n// Convert the positions from this box to CSS compatible positions using\n// the reference container's positions. This has to be done because this\n// box's positions are in reference to the viewport origin, whereas, CSS\n// values are in referecne to their respective edges.\nBoxPosition.prototype.toCSSCompatValues = function(reference) {\n  return {\n    top: this.top - reference.top,\n    bottom: reference.bottom - this.bottom,\n    left: this.left - reference.left,\n    right: reference.right - this.right,\n    height: this.height,\n    width: this.width\n  };\n};\n\n// Get an object that represents the box's position without anything extra.\n// Can pass a StyleBox, HTMLElement, or another BoxPositon.\nBoxPosition.getSimpleBoxPosition = function(obj) {\n  var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n  var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n  var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n\n  obj = obj.div ? obj.div.getBoundingClientRect() :\n                obj.tagName ? obj.getBoundingClientRect() : obj;\n  var ret = {\n    left: obj.left,\n    right: obj.right,\n    top: obj.top || top,\n    height: obj.height || height,\n    bottom: obj.bottom || (top + (obj.height || height)),\n    width: obj.width || width\n  };\n  return ret;\n};\n\n// Move a StyleBox to its specified, or next best, position. The containerBox\n// is the box that contains the StyleBox, such as a div. boxPositions are\n// a list of other boxes that the styleBox can't overlap with.\nfunction moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n\n  // Find the best position for a cue box, b, on the video. The axis parameter\n  // is a list of axis, the order of which, it will move the box along. For example:\n  // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n  // direction. If it doesn't find a good position for it there it will then move\n  // it along the x axis in the negative direction.\n  function findBestPosition(b, axis) {\n    var bestPosition,\n        specifiedPosition = new BoxPosition(b),\n        percentage = 1; // Highest possible so the first thing we get is better.\n\n    for (var i = 0; i < axis.length; i++) {\n      while (b.overlapsOppositeAxis(containerBox, axis[i]) ||\n             (b.within(containerBox) && b.overlapsAny(boxPositions))) {\n        b.move(axis[i]);\n      }\n      // We found a spot where we aren't overlapping anything. This is our\n      // best position.\n      if (b.within(containerBox)) {\n        return b;\n      }\n      var p = b.intersectPercentage(containerBox);\n      // If we're outside the container box less then we were on our last try\n      // then remember this position as the best position.\n      if (percentage > p) {\n        bestPosition = new BoxPosition(b);\n        percentage = p;\n      }\n      // Reset the box position to the specified position.\n      b = new BoxPosition(specifiedPosition);\n    }\n    return bestPosition || specifiedPosition;\n  }\n\n  var boxPosition = new BoxPosition(styleBox),\n      cue = styleBox.cue,\n      linePos = computeLinePos(cue),\n      axis = [];\n\n  // If we have a line number to align the cue to.\n  if (cue.snapToLines) {\n    var size;\n    switch (cue.vertical) {\n    case \"\":\n      axis = [ \"+y\", \"-y\" ];\n      size = \"height\";\n      break;\n    case \"rl\":\n      axis = [ \"+x\", \"-x\" ];\n      size = \"width\";\n      break;\n    case \"lr\":\n      axis = [ \"-x\", \"+x\" ];\n      size = \"width\";\n      break;\n    }\n\n    var step = boxPosition.lineHeight,\n        position = step * Math.round(linePos),\n        maxPosition = containerBox[size] + step,\n        initialAxis = axis[0];\n\n    // If the specified intial position is greater then the max position then\n    // clamp the box to the amount of steps it would take for the box to\n    // reach the max position.\n    if (Math.abs(position) > maxPosition) {\n      position = position < 0 ? -1 : 1;\n      position *= Math.ceil(maxPosition / step) * step;\n    }\n\n    // If computed line position returns negative then line numbers are\n    // relative to the bottom of the video instead of the top. Therefore, we\n    // need to increase our initial position by the length or width of the\n    // video, depending on the writing direction, and reverse our axis directions.\n    if (linePos < 0) {\n      position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n      axis = axis.reverse();\n    }\n\n    // Move the box to the specified position. This may not be its best\n    // position.\n    boxPosition.move(initialAxis, position);\n\n  } else {\n    // If we have a percentage line value for the cue.\n    var calculatedPercentage = (boxPosition.lineHeight / containerBox.height) * 100;\n\n    switch (cue.lineAlign) {\n    case \"middle\":\n      linePos -= (calculatedPercentage / 2);\n      break;\n    case \"end\":\n      linePos -= calculatedPercentage;\n      break;\n    }\n\n    // Apply initial line position to the cue box.\n    switch (cue.vertical) {\n    case \"\":\n      styleBox.applyStyles({\n        top: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"rl\":\n      styleBox.applyStyles({\n        left: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"lr\":\n      styleBox.applyStyles({\n        right: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    }\n\n    axis = [ \"+y\", \"-x\", \"+x\", \"-y\" ];\n\n    // Get the box position again after we've applied the specified positioning\n    // to it.\n    boxPosition = new BoxPosition(styleBox);\n  }\n\n  var bestPosition = findBestPosition(boxPosition, axis);\n  styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n}\n\nfunction WebVTT() {\n  // Nothing\n}\n\n// Helper to allow strings to be decoded instead of the default binary utf8 data.\nWebVTT.StringDecoder = function() {\n  return {\n    decode: function(data) {\n      if (!data) {\n        return \"\";\n      }\n      if (typeof data !== \"string\") {\n        throw new Error(\"Error - expected string data.\");\n      }\n      return decodeURIComponent(encodeURIComponent(data));\n    }\n  };\n};\n\nWebVTT.convertCueToDOMTree = function(window, cuetext) {\n  if (!window || !cuetext) {\n    return null;\n  }\n  return parseContent(window, cuetext);\n};\n\nvar FONT_SIZE_PERCENT = 0.05;\nvar FONT_STYLE = \"sans-serif\";\nvar CUE_BACKGROUND_PADDING = \"1.5%\";\n\n// Runs the processing model over the cues and regions passed to it.\n// @param overlay A block level element (usually a div) that the computed cues\n//                and regions will be placed into.\nWebVTT.processCues = function(window, cues, overlay) {\n  if (!window || !cues || !overlay) {\n    return null;\n  }\n\n  // Remove all previous children.\n  while (overlay.firstChild) {\n    overlay.removeChild(overlay.firstChild);\n  }\n\n  var paddedOverlay = window.document.createElement(\"div\");\n  paddedOverlay.style.position = \"absolute\";\n  paddedOverlay.style.left = \"0\";\n  paddedOverlay.style.right = \"0\";\n  paddedOverlay.style.top = \"0\";\n  paddedOverlay.style.bottom = \"0\";\n  paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n  overlay.appendChild(paddedOverlay);\n\n  // Determine if we need to compute the display states of the cues. This could\n  // be the case if a cue's state has been changed since the last computation or\n  // if it has not been computed yet.\n  function shouldCompute(cues) {\n    for (var i = 0; i < cues.length; i++) {\n      if (cues[i].hasBeenReset || !cues[i].displayState) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  // We don't need to recompute the cues' display states. Just reuse them.\n  if (!shouldCompute(cues)) {\n    for (var i = 0; i < cues.length; i++) {\n      paddedOverlay.appendChild(cues[i].displayState);\n    }\n    return;\n  }\n\n  var boxPositions = [],\n      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n  var styleOptions = {\n    font: fontSize + \"px \" + FONT_STYLE\n  };\n\n  (function() {\n    var styleBox, cue;\n\n    for (var i = 0; i < cues.length; i++) {\n      cue = cues[i];\n\n      // Compute the intial position and styles of the cue div.\n      styleBox = new CueStyleBox(window, cue, styleOptions);\n      paddedOverlay.appendChild(styleBox.div);\n\n      // Move the cue div to it's correct line position.\n      moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);\n\n      // Remember the computed div so that we don't have to recompute it later\n      // if we don't have too.\n      cue.displayState = styleBox.div;\n\n      boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n    }\n  })();\n};\n\nWebVTT.Parser = function(window, vttjs, decoder) {\n  if (!decoder) {\n    decoder = vttjs;\n    vttjs = {};\n  }\n  if (!vttjs) {\n    vttjs = {};\n  }\n\n  this.window = window;\n  this.vttjs = vttjs;\n  this.state = \"INITIAL\";\n  this.buffer = \"\";\n  this.decoder = decoder || new TextDecoder(\"utf8\");\n  this.regionList = [];\n};\n\nWebVTT.Parser.prototype = {\n  // If the error is a ParsingError then report it to the consumer if\n  // possible. If it's not a ParsingError then throw it like normal.\n  reportOrThrowError: function(e) {\n    if (e instanceof ParsingError) {\n      this.onparsingerror && this.onparsingerror(e);\n    } else {\n      throw e;\n    }\n  },\n  parse: function (data) {\n    var self = this;\n\n    // If there is no data then we won't decode it, but will just try to parse\n    // whatever is in buffer already. This may occur in circumstances, for\n    // example when flush() is called.\n    if (data) {\n      // Try to decode the data that we received.\n      self.buffer += self.decoder.decode(data, {stream: true});\n    }\n\n    function collectNextLine() {\n      var buffer = self.buffer;\n      var pos = 0;\n      while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n        ++pos;\n      }\n      var line = buffer.substr(0, pos);\n      // Advance the buffer early in case we fail below.\n      if (buffer[pos] === '\\r') {\n        ++pos;\n      }\n      if (buffer[pos] === '\\n') {\n        ++pos;\n      }\n      self.buffer = buffer.substr(pos);\n      return line;\n    }\n\n    // 3.4 WebVTT region and WebVTT region settings syntax\n    function parseRegion(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function (k, v) {\n        switch (k) {\n        case \"id\":\n          settings.set(k, v);\n          break;\n        case \"width\":\n          settings.percent(k, v);\n          break;\n        case \"lines\":\n          settings.integer(k, v);\n          break;\n        case \"regionanchor\":\n        case \"viewportanchor\":\n          var xy = v.split(',');\n          if (xy.length !== 2) {\n            break;\n          }\n          // We have to make sure both x and y parse, so use a temporary\n          // settings object here.\n          var anchor = new Settings();\n          anchor.percent(\"x\", xy[0]);\n          anchor.percent(\"y\", xy[1]);\n          if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n            break;\n          }\n          settings.set(k + \"X\", anchor.get(\"x\"));\n          settings.set(k + \"Y\", anchor.get(\"y\"));\n          break;\n        case \"scroll\":\n          settings.alt(k, v, [\"up\"]);\n          break;\n        }\n      }, /=/, /\\s/);\n\n      // Create the region, using default values for any values that were not\n      // specified.\n      if (settings.has(\"id\")) {\n        var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n        region.width = settings.get(\"width\", 100);\n        region.lines = settings.get(\"lines\", 3);\n        region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n        region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n        region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n        region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n        region.scroll = settings.get(\"scroll\", \"\");\n        // Register the region.\n        self.onregion && self.onregion(region);\n        // Remember the VTTRegion for later in case we parse any VTTCues that\n        // reference it.\n        self.regionList.push({\n          id: settings.get(\"id\"),\n          region: region\n        });\n      }\n    }\n\n    // draft-pantos-http-live-streaming-20\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n    // 3.5 WebVTT\n    function parseTimestampMap(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function(k, v) {\n        switch(k) {\n        case \"MPEGT\":\n          settings.integer(k + 'S', v);\n          break;\n        case \"LOCA\":\n          settings.set(k + 'L', parseTimeStamp(v));\n          break;\n        }\n      }, /[^\\d]:/, /,/);\n\n      self.ontimestampmap && self.ontimestampmap({\n        \"MPEGTS\": settings.get(\"MPEGTS\"),\n        \"LOCAL\": settings.get(\"LOCAL\")\n      });\n    }\n\n    // 3.2 WebVTT metadata header syntax\n    function parseHeader(input) {\n      if (input.match(/X-TIMESTAMP-MAP/)) {\n        // This line contains HLS X-TIMESTAMP-MAP metadata\n        parseOptions(input, function(k, v) {\n          switch(k) {\n          case \"X-TIMESTAMP-MAP\":\n            parseTimestampMap(v);\n            break;\n          }\n        }, /=/);\n      } else {\n        parseOptions(input, function (k, v) {\n          switch (k) {\n          case \"Region\":\n            // 3.3 WebVTT region metadata header syntax\n            parseRegion(v);\n            break;\n          }\n        }, /:/);\n      }\n\n    }\n\n    // 5.1 WebVTT file parsing.\n    try {\n      var line;\n      if (self.state === \"INITIAL\") {\n        // We can't start parsing until we have the first line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        line = collectNextLine();\n\n        var m = line.match(/^WEBVTT([ \\t].*)?$/);\n        if (!m || !m[0]) {\n          throw new ParsingError(ParsingError.Errors.BadSignature);\n        }\n\n        self.state = \"HEADER\";\n      }\n\n      var alreadyCollectedLine = false;\n      while (self.buffer) {\n        // We can't parse a line until we have the full line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        if (!alreadyCollectedLine) {\n          line = collectNextLine();\n        } else {\n          alreadyCollectedLine = false;\n        }\n\n        switch (self.state) {\n        case \"HEADER\":\n          // 13-18 - Allow a header (metadata) under the WEBVTT line.\n          if (/:/.test(line)) {\n            parseHeader(line);\n          } else if (!line) {\n            // An empty line terminates the header and starts the body (cues).\n            self.state = \"ID\";\n          }\n          continue;\n        case \"NOTE\":\n          // Ignore NOTE blocks.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        case \"ID\":\n          // Check for the start of NOTE blocks.\n          if (/^NOTE($|[ \\t])/.test(line)) {\n            self.state = \"NOTE\";\n            break;\n          }\n          // 19-29 - Allow any number of line terminators, then initialize new cue values.\n          if (!line) {\n            continue;\n          }\n          self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n          self.state = \"CUE\";\n          // 30-39 - Check if self line contains an optional identifier or timing data.\n          if (line.indexOf(\"-->\") === -1) {\n            self.cue.id = line;\n            continue;\n          }\n          // Process line as start of a cue.\n          /*falls through*/\n        case \"CUE\":\n          // 40 - Collect cue timings and settings.\n          try {\n            parseCue(line, self.cue, self.regionList);\n          } catch (e) {\n            self.reportOrThrowError(e);\n            // In case of an error ignore rest of the cue.\n            self.cue = null;\n            self.state = \"BADCUE\";\n            continue;\n          }\n          self.state = \"CUETEXT\";\n          continue;\n        case \"CUETEXT\":\n          var hasSubstring = line.indexOf(\"-->\") !== -1;\n          // 34 - If we have an empty line then report the cue.\n          // 35 - If we have the special substring '-->' then report the cue,\n          // but do not collect the line as we need to process the current\n          // one as a new cue.\n          if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n            // We are done parsing self cue.\n            self.oncue && self.oncue(self.cue);\n            self.cue = null;\n            self.state = \"ID\";\n            continue;\n          }\n          if (self.cue.text) {\n            self.cue.text += \"\\n\";\n          }\n          self.cue.text += line;\n          continue;\n        case \"BADCUE\": // BADCUE\n          // 54-62 - Collect and discard the remaining cue.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        }\n      }\n    } catch (e) {\n      self.reportOrThrowError(e);\n\n      // If we are currently parsing a cue, report what we have.\n      if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n        self.oncue(self.cue);\n      }\n      self.cue = null;\n      // Enter BADWEBVTT state if header was not parsed correctly otherwise\n      // another exception occurred so enter BADCUE state.\n      self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n    }\n    return this;\n  },\n  flush: function () {\n    var self = this;\n    try {\n      // Finish decoding the stream.\n      self.buffer += self.decoder.decode();\n      // Synthesize the end of the current cue or region.\n      if (self.cue || self.state === \"HEADER\") {\n        self.buffer += \"\\n\\n\";\n        self.parse();\n      }\n      // If we've flushed, parsed, and we're still on the INITIAL state then\n      // that means we don't have enough of the stream to parse the first\n      // line.\n      if (self.state === \"INITIAL\") {\n        throw new ParsingError(ParsingError.Errors.BadSignature);\n      }\n    } catch(e) {\n      self.reportOrThrowError(e);\n    }\n    self.onflush && self.onflush();\n    return this;\n  }\n};\n\nmodule.exports = WebVTT;\n","var classof = require('./classof-raw');\nvar regexpExec = require('./regexp-exec');\n\n// `RegExpExec` abstract operation\n// https://tc39.es/ecma262/#sec-regexpexec\nmodule.exports = function (R, S) {\n  var exec = R.exec;\n  if (typeof exec === 'function') {\n    var result = exec.call(R, S);\n    if (typeof result !== 'object') {\n      throw TypeError('RegExp exec method returned something other than an Object or null');\n    }\n    return result;\n  }\n\n  if (classof(R) !== 'RegExp') {\n    throw TypeError('RegExp#exec called on incompatible receiver');\n  }\n\n  return regexpExec.call(R, S);\n};\n\n","'use strict';\n\nexports.utils = require('./des/utils');\nexports.Cipher = require('./des/cipher');\nexports.DES = require('./des/des');\nexports.CBC = require('./des/cbc');\nexports.EDE = require('./des/ede');\n","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar forEach = require('../internals/array-for-each');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  // some Chrome versions have non-configurable methods on DOMTokenList\n  if (CollectionPrototype && CollectionPrototype.forEach !== forEach) try {\n    createNonEnumerableProperty(CollectionPrototype, 'forEach', forEach);\n  } catch (error) {\n    CollectionPrototype.forEach = forEach;\n  }\n}\n","import window from 'global/window';\nvar regexs = {\n  // to determine mime types\n  mp4: /^(av0?1|avc0?[1234]|vp0?9|flac|opus|mp3|mp4a|mp4v|stpp.ttml.im1t)/,\n  webm: /^(vp0?[89]|av0?1|opus|vorbis)/,\n  ogg: /^(vp0?[89]|theora|flac|opus|vorbis)/,\n  // to determine if a codec is audio or video\n  video: /^(av0?1|avc0?[1234]|vp0?[89]|hvc1|hev1|theora|mp4v)/,\n  audio: /^(mp4a|flac|vorbis|opus|ac-[34]|ec-3|alac|mp3|speex|aac)/,\n  text: /^(stpp.ttml.im1t)/,\n  // mux.js support regex\n  muxerVideo: /^(avc0?1)/,\n  muxerAudio: /^(mp4a)/,\n  // match nothing as muxer does not support text right now.\n  // there cannot never be a character before the start of a string\n  // so this matches nothing.\n  muxerText: /a^/\n};\nvar mediaTypes = ['video', 'audio', 'text'];\nvar upperMediaTypes = ['Video', 'Audio', 'Text'];\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec string with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string} codec\n *        Codec string to translate\n * @return {string}\n *         The translated codec string\n */\n\nexport var translateLegacyCodec = function translateLegacyCodec(codec) {\n  if (!codec) {\n    return codec;\n  }\n\n  return codec.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (orig, profile, avcLevel) {\n    var profileHex = ('00' + Number(profile).toString(16)).slice(-2);\n    var avcLevelHex = ('00' + Number(avcLevel).toString(16)).slice(-2);\n    return 'avc1.' + profileHex + '00' + avcLevelHex;\n  });\n};\n/**\n * Replace the old apple-style `avc1.<dd>.<dd>` codec strings with the standard\n * `avc1.<hhhhhh>`\n *\n * @param {string[]} codecs\n *        An array of codec strings to translate\n * @return {string[]}\n *         The translated array of codec strings\n */\n\nexport var translateLegacyCodecs = function translateLegacyCodecs(codecs) {\n  return codecs.map(translateLegacyCodec);\n};\n/**\n * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the\n * standard `avc1.<hhhhhh>`.\n *\n * @param {string} codecString\n *        The codec string\n * @return {string}\n *         The codec string with old apple-style codecs replaced\n *\n * @private\n */\n\nexport var mapLegacyAvcCodecs = function mapLegacyAvcCodecs(codecString) {\n  return codecString.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (match) {\n    return translateLegacyCodecs([match])[0];\n  });\n};\n/**\n * @typedef {Object} ParsedCodecInfo\n * @property {number} codecCount\n *           Number of codecs parsed\n * @property {string} [videoCodec]\n *           Parsed video codec (if found)\n * @property {string} [videoObjectTypeIndicator]\n *           Video object type indicator (if found)\n * @property {string|null} audioProfile\n *           Audio profile\n */\n\n/**\n * Parses a codec string to retrieve the number of codecs specified, the video codec and\n * object type indicator, and the audio profile.\n *\n * @param {string} [codecString]\n *        The codec string to parse\n * @return {ParsedCodecInfo}\n *         Parsed codec info\n */\n\nexport var parseCodecs = function parseCodecs(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  var codecs = codecString.split(',');\n  var result = [];\n  codecs.forEach(function (codec) {\n    codec = codec.trim();\n    var codecType;\n    mediaTypes.forEach(function (name) {\n      var match = regexs[name].exec(codec.toLowerCase());\n\n      if (!match || match.length <= 1) {\n        return;\n      }\n\n      codecType = name; // maintain codec case\n\n      var type = codec.substring(0, match[1].length);\n      var details = codec.replace(type, '');\n      result.push({\n        type: type,\n        details: details,\n        mediaType: name\n      });\n    });\n\n    if (!codecType) {\n      result.push({\n        type: codec,\n        details: '',\n        mediaType: 'unknown'\n      });\n    }\n  });\n  return result;\n};\n/**\n * Returns a ParsedCodecInfo object for the default alternate audio playlist if there is\n * a default alternate audio playlist for the provided audio group.\n *\n * @param {Object} master\n *        The master playlist\n * @param {string} audioGroupId\n *        ID of the audio group for which to find the default codec info\n * @return {ParsedCodecInfo}\n *         Parsed codec info\n */\n\nexport var codecsFromDefault = function codecsFromDefault(master, audioGroupId) {\n  if (!master.mediaGroups.AUDIO || !audioGroupId) {\n    return null;\n  }\n\n  var audioGroup = master.mediaGroups.AUDIO[audioGroupId];\n\n  if (!audioGroup) {\n    return null;\n  }\n\n  for (var name in audioGroup) {\n    var audioType = audioGroup[name];\n\n    if (audioType.default && audioType.playlists) {\n      // codec should be the same for all playlists within the audio type\n      return parseCodecs(audioType.playlists[0].attributes.CODECS);\n    }\n  }\n\n  return null;\n};\nexport var isVideoCodec = function isVideoCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.video.test(codec.trim().toLowerCase());\n};\nexport var isAudioCodec = function isAudioCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.audio.test(codec.trim().toLowerCase());\n};\nexport var isTextCodec = function isTextCodec(codec) {\n  if (codec === void 0) {\n    codec = '';\n  }\n\n  return regexs.text.test(codec.trim().toLowerCase());\n};\nexport var getMimeForCodec = function getMimeForCodec(codecString) {\n  if (!codecString || typeof codecString !== 'string') {\n    return;\n  }\n\n  var codecs = codecString.toLowerCase().split(',').map(function (c) {\n    return translateLegacyCodec(c.trim());\n  }); // default to video type\n\n  var type = 'video'; // only change to audio type if the only codec we have is\n  // audio\n\n  if (codecs.length === 1 && isAudioCodec(codecs[0])) {\n    type = 'audio';\n  } else if (codecs.length === 1 && isTextCodec(codecs[0])) {\n    // text uses application/<container> for now\n    type = 'application';\n  } // default the container to mp4\n\n\n  var container = 'mp4'; // every codec must be able to go into the container\n  // for that container to be the correct one\n\n  if (codecs.every(function (c) {\n    return regexs.mp4.test(c);\n  })) {\n    container = 'mp4';\n  } else if (codecs.every(function (c) {\n    return regexs.webm.test(c);\n  })) {\n    container = 'webm';\n  } else if (codecs.every(function (c) {\n    return regexs.ogg.test(c);\n  })) {\n    container = 'ogg';\n  }\n\n  return type + \"/\" + container + \";codecs=\\\"\" + codecString + \"\\\"\";\n};\nexport var browserSupportsCodec = function browserSupportsCodec(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  return window.MediaSource && window.MediaSource.isTypeSupported && window.MediaSource.isTypeSupported(getMimeForCodec(codecString)) || false;\n};\nexport var muxerSupportsCodec = function muxerSupportsCodec(codecString) {\n  if (codecString === void 0) {\n    codecString = '';\n  }\n\n  return codecString.toLowerCase().split(',').every(function (codec) {\n    codec = codec.trim(); // any match is supported.\n\n    for (var i = 0; i < upperMediaTypes.length; i++) {\n      var type = upperMediaTypes[i];\n\n      if (regexs[\"muxer\" + type].test(codec)) {\n        return true;\n      }\n    }\n\n    return false;\n  });\n};\nexport var DEFAULT_AUDIO_CODEC = 'mp4a.40.2';\nexport var DEFAULT_VIDEO_CODEC = 'avc1.4d400d';","'use strict';\nvar $forEach = require('../internals/array-iteration').forEach;\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar STRICT_METHOD = arrayMethodIsStrict('forEach');\n\n// `Array.prototype.forEach` method implementation\n// https://tc39.es/ecma262/#sec-array.prototype.foreach\nmodule.exports = !STRICT_METHOD ? function forEach(callbackfn /* , thisArg */) {\n  return $forEach(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n// eslint-disable-next-line es/no-array-prototype-foreach -- safe\n} : [].forEach;\n",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Check if typed arrays are supported\n\t    if (typeof ArrayBuffer != 'function') {\n\t        return;\n\t    }\n\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\n\t    // Reference original init\n\t    var superInit = WordArray.init;\n\n\t    // Augment WordArray.init to handle typed arrays\n\t    var subInit = WordArray.init = function (typedArray) {\n\t        // Convert buffers to uint8\n\t        if (typedArray instanceof ArrayBuffer) {\n\t            typedArray = new Uint8Array(typedArray);\n\t        }\n\n\t        // Convert other array views to uint8\n\t        if (\n\t            typedArray instanceof Int8Array ||\n\t            (typeof Uint8ClampedArray !== \"undefined\" && typedArray instanceof Uint8ClampedArray) ||\n\t            typedArray instanceof Int16Array ||\n\t            typedArray instanceof Uint16Array ||\n\t            typedArray instanceof Int32Array ||\n\t            typedArray instanceof Uint32Array ||\n\t            typedArray instanceof Float32Array ||\n\t            typedArray instanceof Float64Array\n\t        ) {\n\t            typedArray = new Uint8Array(typedArray.buffer, typedArray.byteOffset, typedArray.byteLength);\n\t        }\n\n\t        // Handle Uint8Array\n\t        if (typedArray instanceof Uint8Array) {\n\t            // Shortcut\n\t            var typedArrayByteLength = typedArray.byteLength;\n\n\t            // Extract bytes\n\t            var words = [];\n\t            for (var i = 0; i < typedArrayByteLength; i++) {\n\t                words[i >>> 2] |= typedArray[i] << (24 - (i % 4) * 8);\n\t            }\n\n\t            // Initialize this word array\n\t            superInit.call(this, words, typedArrayByteLength);\n\t        } else {\n\t            // Else call normal init\n\t            superInit.apply(this, arguments);\n\t        }\n\t    };\n\n\t    subInit.prototype = WordArray;\n\t}());\n\n\n\treturn CryptoJS.lib.WordArray;\n\n}));",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./sha256\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./sha256\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var C_algo = C.algo;\n\t    var SHA256 = C_algo.SHA256;\n\n\t    /**\n\t     * SHA-224 hash algorithm.\n\t     */\n\t    var SHA224 = C_algo.SHA224 = SHA256.extend({\n\t        _doReset: function () {\n\t            this._hash = new WordArray.init([\n\t                0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,\n\t                0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4\n\t            ]);\n\t        },\n\n\t        _doFinalize: function () {\n\t            var hash = SHA256._doFinalize.call(this);\n\n\t            hash.sigBytes -= 4;\n\n\t            return hash;\n\t        }\n\t    });\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.SHA224('message');\n\t     *     var hash = CryptoJS.SHA224(wordArray);\n\t     */\n\t    C.SHA224 = SHA256._createHelper(SHA224);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacSHA224(message, key);\n\t     */\n\t    C.HmacSHA224 = SHA256._createHmacHelper(SHA224);\n\t}());\n\n\n\treturn CryptoJS.SHA224;\n\n}));","module.exports = function (it, Constructor, name) {\n  if (!(it instanceof Constructor)) {\n    throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');\n  } return it;\n};\n","'use strict';\n\nvar _lineStream = require('./line-stream');\n\nvar _lineStream2 = _interopRequireDefault(_lineStream);\n\nvar _parseStream = require('./parse-stream');\n\nvar _parseStream2 = _interopRequireDefault(_parseStream);\n\nvar _parser = require('./parser');\n\nvar _parser2 = _interopRequireDefault(_parser);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nmodule.exports = {\n  LineStream: _lineStream2['default'],\n  ParseStream: _parseStream2['default'],\n  Parser: _parser2['default']\n}; /**\n    * @file m3u8/index.js\n    *\n    * Utilities for parsing M3U8 files. If the entire manifest is available,\n    * `Parser` will create an object representation with enough detail for managing\n    * playback. `ParseStream` and `LineStream` are lower-level parsing primitives\n    * that do not assume the entirety of the manifest is ready and expose a\n    * ReadableStream-like interface.\n    */","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n'use strict';\n\nmodule.exports = Writable;\n/* <replacement> */\n\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n} // It seems a linked list but it is not\n// there will be only 2 of these for each stream\n\n\nfunction CorkedRequest(state) {\n  var _this = this;\n\n  this.next = null;\n  this.entry = null;\n\n  this.finish = function () {\n    onCorkedFinish(_this, state);\n  };\n}\n/* </replacement> */\n\n/*<replacement>*/\n\n\nvar Duplex;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n/*<replacement>*/\n\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n/*<replacement>*/\n\nvar Stream = require('./internal/streams/stream');\n/*</replacement>*/\n\n\nvar Buffer = require('buffer').Buffer;\n\nvar OurUint8Array = global.Uint8Array || function () {};\n\nfunction _uint8ArrayToBuffer(chunk) {\n  return Buffer.from(chunk);\n}\n\nfunction _isUint8Array(obj) {\n  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n\nvar destroyImpl = require('./internal/streams/destroy');\n\nvar _require = require('./internal/streams/state'),\n    getHighWaterMark = _require.getHighWaterMark;\n\nvar _require$codes = require('../errors').codes,\n    ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,\n    ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,\n    ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,\n    ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,\n    ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,\n    ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,\n    ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,\n    ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;\n\nvar errorOrDestroy = destroyImpl.errorOrDestroy;\n\nrequire('inherits')(Writable, Stream);\n\nfunction nop() {}\n\nfunction WritableState(options, stream, isDuplex) {\n  Duplex = Duplex || require('./_stream_duplex');\n  options = options || {}; // Duplex streams are both readable and writable, but share\n  // the same options object.\n  // However, some cases require setting options to different\n  // values for the readable and the writable sides of the duplex stream,\n  // e.g. options.readableObjectMode vs. options.writableObjectMode, etc.\n\n  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n\n  this.objectMode = !!options.objectMode;\n  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode; // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n\n  this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex); // if _final has been called\n\n  this.finalCalled = false; // drain event flag.\n\n  this.needDrain = false; // at the start of calling end()\n\n  this.ending = false; // when end() has been called, and returned\n\n  this.ended = false; // when 'finish' is emitted\n\n  this.finished = false; // has it been destroyed\n\n  this.destroyed = false; // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode; // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n\n  this.defaultEncoding = options.defaultEncoding || 'utf8'; // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n\n  this.length = 0; // a flag to see when we're in the middle of a write.\n\n  this.writing = false; // when true all writes will be buffered until .uncork() call\n\n  this.corked = 0; // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n\n  this.sync = true; // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n\n  this.bufferProcessing = false; // the callback that's passed to _write(chunk,cb)\n\n  this.onwrite = function (er) {\n    onwrite(stream, er);\n  }; // the callback that the user supplies to write(chunk,encoding,cb)\n\n\n  this.writecb = null; // the amount that is being written when _write is called.\n\n  this.writelen = 0;\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null; // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n\n  this.pendingcb = 0; // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n\n  this.prefinished = false; // True if the error was already emitted and should not be thrown again\n\n  this.errorEmitted = false; // Should close be emitted on destroy. Defaults to true.\n\n  this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'finish' (and potentially 'end')\n\n  this.autoDestroy = !!options.autoDestroy; // count buffered requests\n\n  this.bufferedRequestCount = 0; // allocate the first CorkedRequest, there is always\n  // one allocated and free to use, and we maintain at most two\n\n  this.corkedRequestsFree = new CorkedRequest(this);\n}\n\nWritableState.prototype.getBuffer = function getBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n\n  return out;\n};\n\n(function () {\n  try {\n    Object.defineProperty(WritableState.prototype, 'buffer', {\n      get: internalUtil.deprecate(function writableStateBufferGetter() {\n        return this.getBuffer();\n      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')\n    });\n  } catch (_) {}\n})(); // Test _writableState for inheritance to account for Duplex streams,\n// whose prototype chain only points to Readable.\n\n\nvar realHasInstance;\n\nif (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {\n  realHasInstance = Function.prototype[Symbol.hasInstance];\n  Object.defineProperty(Writable, Symbol.hasInstance, {\n    value: function value(object) {\n      if (realHasInstance.call(this, object)) return true;\n      if (this !== Writable) return false;\n      return object && object._writableState instanceof WritableState;\n    }\n  });\n} else {\n  realHasInstance = function realHasInstance(object) {\n    return object instanceof this;\n  };\n}\n\nfunction Writable(options) {\n  Duplex = Duplex || require('./_stream_duplex'); // Writable ctor is applied to Duplexes, too.\n  // `realHasInstance` is necessary because using plain `instanceof`\n  // would return false, as no `_writableState` property is attached.\n  // Trying to use the custom `instanceof` for Writable here will also break the\n  // Node.js LazyTransform implementation, which has a non-trivial getter for\n  // `_writableState` that would lead to infinite recursion.\n  // Checking for a Stream.Duplex instance is faster here instead of inside\n  // the WritableState constructor, at least with V8 6.5\n\n  var isDuplex = this instanceof Duplex;\n  if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);\n  this._writableState = new WritableState(options, this, isDuplex); // legacy.\n\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function') this._write = options.write;\n    if (typeof options.writev === 'function') this._writev = options.writev;\n    if (typeof options.destroy === 'function') this._destroy = options.destroy;\n    if (typeof options.final === 'function') this._final = options.final;\n  }\n\n  Stream.call(this);\n} // Otherwise people can pipe Writable streams, which is just wrong.\n\n\nWritable.prototype.pipe = function () {\n  errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());\n};\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new ERR_STREAM_WRITE_AFTER_END(); // TODO: defer error events consistently everywhere, not just the cb\n\n  errorOrDestroy(stream, er);\n  process.nextTick(cb, er);\n} // Checks that a user-supplied chunk is valid, especially for the particular\n// mode the stream is in. Currently this means that `null` is never accepted\n// and undefined/non-string values are only allowed in object mode.\n\n\nfunction validChunk(stream, state, chunk, cb) {\n  var er;\n\n  if (chunk === null) {\n    er = new ERR_STREAM_NULL_VALUES();\n  } else if (typeof chunk !== 'string' && !state.objectMode) {\n    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer'], chunk);\n  }\n\n  if (er) {\n    errorOrDestroy(stream, er);\n    process.nextTick(cb, er);\n    return false;\n  }\n\n  return true;\n}\n\nWritable.prototype.write = function (chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n\n  var isBuf = !state.objectMode && _isUint8Array(chunk);\n\n  if (isBuf && !Buffer.isBuffer(chunk)) {\n    chunk = _uint8ArrayToBuffer(chunk);\n  }\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;\n  if (typeof cb !== 'function') cb = nop;\n  if (state.ending) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);\n  }\n  return ret;\n};\n\nWritable.prototype.cork = function () {\n  this._writableState.corked++;\n};\n\nWritable.prototype.uncork = function () {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n    if (!state.writing && !state.corked && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string') encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new ERR_UNKNOWN_ENCODING(encoding);\n  this._writableState.defaultEncoding = encoding;\n  return this;\n};\n\nObject.defineProperty(Writable.prototype, 'writableBuffer', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState && this._writableState.getBuffer();\n  }\n});\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {\n    chunk = Buffer.from(chunk, encoding);\n  }\n\n  return chunk;\n}\n\nObject.defineProperty(Writable.prototype, 'writableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.highWaterMark;\n  }\n}); // if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\n\nfunction writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {\n  if (!isBuf) {\n    var newChunk = decodeChunk(state, chunk, encoding);\n\n    if (chunk !== newChunk) {\n      isBuf = true;\n      encoding = 'buffer';\n      chunk = newChunk;\n    }\n  }\n\n  var len = state.objectMode ? 1 : chunk.length;\n  state.length += len;\n  var ret = state.length < state.highWaterMark; // we must ensure that previous needDrain will not be reset to false.\n\n  if (!ret) state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = {\n      chunk: chunk,\n      encoding: encoding,\n      isBuf: isBuf,\n      callback: cb,\n      next: null\n    };\n\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n\n    state.bufferedRequestCount += 1;\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'));else if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n\n  if (sync) {\n    // defer the callback if we are being called synchronously\n    // to avoid piling up things on the stack\n    process.nextTick(cb, er); // this can emit finish, and it will always happen\n    // after error\n\n    process.nextTick(finishMaybe, stream, state);\n    stream._writableState.errorEmitted = true;\n    errorOrDestroy(stream, er);\n  } else {\n    // the caller expect this to happen before if\n    // it is async\n    cb(er);\n    stream._writableState.errorEmitted = true;\n    errorOrDestroy(stream, er); // this can emit finish, but finish must\n    // always follow error\n\n    finishMaybe(stream, state);\n  }\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n  if (typeof cb !== 'function') throw new ERR_MULTIPLE_CALLBACK();\n  onwriteStateUpdate(state);\n  if (er) onwriteError(stream, state, sync, er, cb);else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state) || stream.destroyed;\n\n    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      process.nextTick(afterWrite, stream, state, finished, cb);\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished) onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n} // Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\n\n\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n} // if there's something in the buffer waiting, then process it\n\n\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var l = state.bufferedRequestCount;\n    var buffer = new Array(l);\n    var holder = state.corkedRequestsFree;\n    holder.entry = entry;\n    var count = 0;\n    var allBuffers = true;\n\n    while (entry) {\n      buffer[count] = entry;\n      if (!entry.isBuf) allBuffers = false;\n      entry = entry.next;\n      count += 1;\n    }\n\n    buffer.allBuffers = allBuffers;\n    doWrite(stream, state, true, state.length, buffer, '', holder.finish); // doWrite is almost always async, defer these to save a bit of time\n    // as the hot path ends with doWrite\n\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n\n    if (holder.next) {\n      state.corkedRequestsFree = holder.next;\n      holder.next = null;\n    } else {\n      state.corkedRequestsFree = new CorkedRequest(state);\n    }\n\n    state.bufferedRequestCount = 0;\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      state.bufferedRequestCount--; // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null) state.lastBufferedRequest = null;\n  }\n\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function (chunk, encoding, cb) {\n  cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function (chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); // .end() fully uncorks\n\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  } // ignore unnecessary end() calls.\n\n\n  if (!state.ending) endWritable(this, state, cb);\n  return this;\n};\n\nObject.defineProperty(Writable.prototype, 'writableLength', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.length;\n  }\n});\n\nfunction needFinish(state) {\n  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;\n}\n\nfunction callFinal(stream, state) {\n  stream._final(function (err) {\n    state.pendingcb--;\n\n    if (err) {\n      errorOrDestroy(stream, err);\n    }\n\n    state.prefinished = true;\n    stream.emit('prefinish');\n    finishMaybe(stream, state);\n  });\n}\n\nfunction prefinish(stream, state) {\n  if (!state.prefinished && !state.finalCalled) {\n    if (typeof stream._final === 'function' && !state.destroyed) {\n      state.pendingcb++;\n      state.finalCalled = true;\n      process.nextTick(callFinal, stream, state);\n    } else {\n      state.prefinished = true;\n      stream.emit('prefinish');\n    }\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n\n  if (need) {\n    prefinish(stream, state);\n\n    if (state.pendingcb === 0) {\n      state.finished = true;\n      stream.emit('finish');\n\n      if (state.autoDestroy) {\n        // In case of duplex streams we need a way to detect\n        // if the readable side is ready for autoDestroy as well\n        var rState = stream._readableState;\n\n        if (!rState || rState.autoDestroy && rState.endEmitted) {\n          stream.destroy();\n        }\n      }\n    }\n  }\n\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n\n  if (cb) {\n    if (state.finished) process.nextTick(cb);else stream.once('finish', cb);\n  }\n\n  state.ended = true;\n  stream.writable = false;\n}\n\nfunction onCorkedFinish(corkReq, state, err) {\n  var entry = corkReq.entry;\n  corkReq.entry = null;\n\n  while (entry) {\n    var cb = entry.callback;\n    state.pendingcb--;\n    cb(err);\n    entry = entry.next;\n  } // reuse the free corkReq.\n\n\n  state.corkedRequestsFree.next = corkReq;\n}\n\nObject.defineProperty(Writable.prototype, 'destroyed', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    if (this._writableState === undefined) {\n      return false;\n    }\n\n    return this._writableState.destroyed;\n  },\n  set: function set(value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (!this._writableState) {\n      return;\n    } // backward compatibility, the user is explicitly\n    // managing destroyed\n\n\n    this._writableState.destroyed = value;\n  }\n});\nWritable.prototype.destroy = destroyImpl.destroy;\nWritable.prototype._undestroy = destroyImpl.undestroy;\n\nWritable.prototype._destroy = function (err, cb) {\n  cb(err);\n};","var t=function(){return t=Object.assign||function(t){for(var i,n=1,s=arguments.length;n<s;n++)for(var a in i=arguments[n])Object.prototype.hasOwnProperty.call(i,a)&&(t[a]=i[a]);return t},t.apply(this,arguments)},i=function(){function i(i,n,s){var a=this;this.endVal=n,this.options=s,this.version=\"2.8.0\",this.defaults={startVal:0,decimalPlaces:0,duration:2,useEasing:!0,useGrouping:!0,useIndianSeparators:!1,smartEasingThreshold:999,smartEasingAmount:333,separator:\",\",decimal:\".\",prefix:\"\",suffix:\"\",enableScrollSpy:!1,scrollSpyDelay:200,scrollSpyOnce:!1},this.finalEndVal=null,this.useEasing=!0,this.countDown=!1,this.error=\"\",this.startVal=0,this.paused=!0,this.once=!1,this.count=function(t){a.startTime||(a.startTime=t);var i=t-a.startTime;a.remaining=a.duration-i,a.useEasing?a.countDown?a.frameVal=a.startVal-a.easingFn(i,0,a.startVal-a.endVal,a.duration):a.frameVal=a.easingFn(i,a.startVal,a.endVal-a.startVal,a.duration):a.frameVal=a.startVal+(a.endVal-a.startVal)*(i/a.duration);var n=a.countDown?a.frameVal<a.endVal:a.frameVal>a.endVal;a.frameVal=n?a.endVal:a.frameVal,a.frameVal=Number(a.frameVal.toFixed(a.options.decimalPlaces)),a.printValue(a.frameVal),i<a.duration?a.rAF=requestAnimationFrame(a.count):null!==a.finalEndVal?a.update(a.finalEndVal):a.options.onCompleteCallback&&a.options.onCompleteCallback()},this.formatNumber=function(t){var i,n,s,e,o=t<0?\"-\":\"\";i=Math.abs(t).toFixed(a.options.decimalPlaces);var r=(i+=\"\").split(\".\");if(n=r[0],s=r.length>1?a.options.decimal+r[1]:\"\",a.options.useGrouping){e=\"\";for(var l=3,h=0,u=0,p=n.length;u<p;++u)a.options.useIndianSeparators&&4===u&&(l=2,h=1),0!==u&&h%l==0&&(e=a.options.separator+e),h++,e=n[p-u-1]+e;n=e}return a.options.numerals&&a.options.numerals.length&&(n=n.replace(/[0-9]/g,(function(t){return a.options.numerals[+t]})),s=s.replace(/[0-9]/g,(function(t){return a.options.numerals[+t]}))),o+a.options.prefix+n+s+a.options.suffix},this.easeOutExpo=function(t,i,n,s){return n*(1-Math.pow(2,-10*t/s))*1024/1023+i},this.options=t(t({},this.defaults),s),this.formattingFn=this.options.formattingFn?this.options.formattingFn:this.formatNumber,this.easingFn=this.options.easingFn?this.options.easingFn:this.easeOutExpo,this.startVal=this.validateValue(this.options.startVal),this.frameVal=this.startVal,this.endVal=this.validateValue(n),this.options.decimalPlaces=Math.max(this.options.decimalPlaces),this.resetDuration(),this.options.separator=String(this.options.separator),this.useEasing=this.options.useEasing,\"\"===this.options.separator&&(this.options.useGrouping=!1),this.el=\"string\"==typeof i?document.getElementById(i):i,this.el?this.printValue(this.startVal):this.error=\"[CountUp] target is null or undefined\",\"undefined\"!=typeof window&&this.options.enableScrollSpy&&(this.error?console.error(this.error,i):(window.onScrollFns=window.onScrollFns||[],window.onScrollFns.push((function(){return a.handleScroll(a)})),window.onscroll=function(){window.onScrollFns.forEach((function(t){return t()}))},this.handleScroll(this)))}return i.prototype.handleScroll=function(t){if(t&&window&&!t.once){var i=window.innerHeight+window.scrollY,n=t.el.getBoundingClientRect(),s=n.top+window.pageYOffset,a=n.top+n.height+window.pageYOffset;a<i&&a>window.scrollY&&t.paused?(t.paused=!1,setTimeout((function(){return t.start()}),t.options.scrollSpyDelay),t.options.scrollSpyOnce&&(t.once=!0)):(window.scrollY>a||s>i)&&!t.paused&&t.reset()}},i.prototype.determineDirectionAndSmartEasing=function(){var t=this.finalEndVal?this.finalEndVal:this.endVal;this.countDown=this.startVal>t;var i=t-this.startVal;if(Math.abs(i)>this.options.smartEasingThreshold&&this.options.useEasing){this.finalEndVal=t;var n=this.countDown?1:-1;this.endVal=t+n*this.options.smartEasingAmount,this.duration=this.duration/2}else this.endVal=t,this.finalEndVal=null;null!==this.finalEndVal?this.useEasing=!1:this.useEasing=this.options.useEasing},i.prototype.start=function(t){this.error||(this.options.onStartCallback&&this.options.onStartCallback(),t&&(this.options.onCompleteCallback=t),this.duration>0?(this.determineDirectionAndSmartEasing(),this.paused=!1,this.rAF=requestAnimationFrame(this.count)):this.printValue(this.endVal))},i.prototype.pauseResume=function(){this.paused?(this.startTime=null,this.duration=this.remaining,this.startVal=this.frameVal,this.determineDirectionAndSmartEasing(),this.rAF=requestAnimationFrame(this.count)):cancelAnimationFrame(this.rAF),this.paused=!this.paused},i.prototype.reset=function(){cancelAnimationFrame(this.rAF),this.paused=!0,this.resetDuration(),this.startVal=this.validateValue(this.options.startVal),this.frameVal=this.startVal,this.printValue(this.startVal)},i.prototype.update=function(t){cancelAnimationFrame(this.rAF),this.startTime=null,this.endVal=this.validateValue(t),this.endVal!==this.frameVal&&(this.startVal=this.frameVal,null==this.finalEndVal&&this.resetDuration(),this.finalEndVal=null,this.determineDirectionAndSmartEasing(),this.rAF=requestAnimationFrame(this.count))},i.prototype.printValue=function(t){var i;if(this.el){var n=this.formattingFn(t);if(null===(i=this.options.plugin)||void 0===i?void 0:i.render)this.options.plugin.render(this.el,n);else if(\"INPUT\"===this.el.tagName)this.el.value=n;else\"text\"===this.el.tagName||\"tspan\"===this.el.tagName?this.el.textContent=n:this.el.innerHTML=n}},i.prototype.ensureNumber=function(t){return\"number\"==typeof t&&!isNaN(t)},i.prototype.validateValue=function(t){var i=Number(t);return this.ensureNumber(i)?i:(this.error=\"[CountUp] invalid start or end value: \".concat(t),null)},i.prototype.resetDuration=function(){this.startTime=null,this.duration=1e3*Number(this.options.duration),this.remaining=this.duration},i}();export{i as CountUp};\n","'use strict'\nvar inherits = require('inherits')\nvar Legacy = require('./legacy')\nvar Base = require('cipher-base')\nvar Buffer = require('safe-buffer').Buffer\nvar md5 = require('create-hash/md5')\nvar RIPEMD160 = require('ripemd160')\n\nvar sha = require('sha.js')\n\nvar ZEROS = Buffer.alloc(128)\n\nfunction Hmac (alg, key) {\n  Base.call(this, 'digest')\n  if (typeof key === 'string') {\n    key = Buffer.from(key)\n  }\n\n  var blocksize = (alg === 'sha512' || alg === 'sha384') ? 128 : 64\n\n  this._alg = alg\n  this._key = key\n  if (key.length > blocksize) {\n    var hash = alg === 'rmd160' ? new RIPEMD160() : sha(alg)\n    key = hash.update(key).digest()\n  } else if (key.length < blocksize) {\n    key = Buffer.concat([key, ZEROS], blocksize)\n  }\n\n  var ipad = this._ipad = Buffer.allocUnsafe(blocksize)\n  var opad = this._opad = Buffer.allocUnsafe(blocksize)\n\n  for (var i = 0; i < blocksize; i++) {\n    ipad[i] = key[i] ^ 0x36\n    opad[i] = key[i] ^ 0x5C\n  }\n  this._hash = alg === 'rmd160' ? new RIPEMD160() : sha(alg)\n  this._hash.update(ipad)\n}\n\ninherits(Hmac, Base)\n\nHmac.prototype._update = function (data) {\n  this._hash.update(data)\n}\n\nHmac.prototype._final = function () {\n  var h = this._hash.digest()\n  var hash = this._alg === 'rmd160' ? new RIPEMD160() : sha(this._alg)\n  return hash.update(this._opad).update(h).digest()\n}\n\nmodule.exports = function createHmac (alg, key) {\n  alg = alg.toLowerCase()\n  if (alg === 'rmd160' || alg === 'ripemd160') {\n    return new Hmac('rmd160', key)\n  }\n  if (alg === 'md5') {\n    return new Legacy(md5, key)\n  }\n  return new Hmac(alg, key)\n}\n","/**\n * mux.js\n *\n * Copyright (c) 2015 Brightcove\n * All rights reserved.\n *\n * Utilities to detect basic properties and metadata about MP4s.\n */\n'use strict';\n\nvar findBox, parseType, timescale, startTime;\n\n// Find the data for a box specified by its path\nfindBox = function(data, path) {\n  var results = [],\n      i, size, type, end, subresults;\n\n  if (!path.length) {\n    // short-circuit the search for empty paths\n    return null;\n  }\n\n  for (i = 0; i < data.byteLength;) {\n    size  = data[i]     << 24;\n    size |= data[i + 1] << 16;\n    size |= data[i + 2] << 8;\n    size |= data[i + 3];\n\n    type = parseType(data.subarray(i + 4, i + 8));\n\n    end = size > 1 ? i + size : data.byteLength;\n\n    if (type === path[0]) {\n      if (path.length === 1) {\n        // this is the end of the path and we've found the box we were\n        // looking for\n        results.push(data.subarray(i + 8, end));\n      } else {\n        // recursively search for the next box along the path\n        subresults = findBox(data.subarray(i + 8, end), path.slice(1));\n        if (subresults.length) {\n          results = results.concat(subresults);\n        }\n      }\n    }\n    i = end;\n  }\n\n  // we've finished searching all of data\n  return results;\n};\n\n/**\n * Returns the string representation of an ASCII encoded four byte buffer.\n * @param buffer {Uint8Array} a four-byte buffer to translate\n * @return {string} the corresponding string\n */\nparseType = function(buffer) {\n  var result = '';\n  result += String.fromCharCode(buffer[0]);\n  result += String.fromCharCode(buffer[1]);\n  result += String.fromCharCode(buffer[2]);\n  result += String.fromCharCode(buffer[3]);\n  return result;\n};\n\n/**\n * Parses an MP4 initialization segment and extracts the timescale\n * values for any declared tracks. Timescale values indicate the\n * number of clock ticks per second to assume for time-based values\n * elsewhere in the MP4.\n *\n * To determine the start time of an MP4, you need two pieces of\n * information: the timescale unit and the earliest base media decode\n * time. Multiple timescales can be specified within an MP4 but the\n * base media decode time is always expressed in the timescale from\n * the media header box for the track:\n * ```\n * moov > trak > mdia > mdhd.timescale\n * ```\n * @param init {Uint8Array} the bytes of the init segment\n * @return {object} a hash of track ids to timescale values or null if\n * the init segment is malformed.\n */\ntimescale = function(init) {\n  var\n    result = {},\n    traks = findBox(init, ['moov', 'trak']);\n\n  // mdhd timescale\n  return traks.reduce(function(result, trak) {\n    var tkhd, version, index, id, mdhd;\n\n    tkhd = findBox(trak, ['tkhd'])[0];\n    if (!tkhd) {\n      return null;\n    }\n    version = tkhd[0];\n    index = version === 0 ? 12 : 20;\n    id = tkhd[index]     << 24 |\n         tkhd[index + 1] << 16 |\n         tkhd[index + 2] <<  8 |\n         tkhd[index + 3];\n\n    mdhd = findBox(trak, ['mdia', 'mdhd'])[0];\n    if (!mdhd) {\n      return null;\n    }\n    version = mdhd[0];\n    index = version === 0 ? 12 : 20;\n    result[id] = mdhd[index]     << 24 |\n                 mdhd[index + 1] << 16 |\n                 mdhd[index + 2] <<  8 |\n                 mdhd[index + 3];\n    return result;\n  }, result);\n};\n\n/**\n * Determine the base media decode start time, in seconds, for an MP4\n * fragment. If multiple fragments are specified, the earliest time is\n * returned.\n *\n * The base media decode time can be parsed from track fragment\n * metadata:\n * ```\n * moof > traf > tfdt.baseMediaDecodeTime\n * ```\n * It requires the timescale value from the mdhd to interpret.\n *\n * @param timescale {object} a hash of track ids to timescale values.\n * @return {number} the earliest base media decode start time for the\n * fragment, in seconds\n */\nstartTime = function(timescale, fragment) {\n  var trafs, baseTimes, result;\n\n  // we need info from two childrend of each track fragment box\n  trafs = findBox(fragment, ['moof', 'traf']);\n\n  // determine the start times for each track\n  baseTimes = [].concat.apply([], trafs.map(function(traf) {\n    return findBox(traf, ['tfhd']).map(function(tfhd) {\n      var id, scale, baseTime;\n\n      // get the track id from the tfhd\n      id = tfhd[4] << 24 |\n           tfhd[5] << 16 |\n           tfhd[6] << 8 |\n           tfhd[7];\n      // assume a 90kHz clock if no timescale was specified\n      scale = timescale[id] || 90e3;\n\n      // get the base media decode time from the tfdt\n      baseTime = findBox(traf, ['tfdt']).map(function(tfdt) {\n        var version, result;\n\n        version = tfdt[0];\n        result = tfdt[4] << 24 |\n                 tfdt[5] << 16 |\n                 tfdt[6] <<  8 |\n                 tfdt[7];\n        if (version ===  1) {\n          result *= Math.pow(2, 32);\n          result += tfdt[8]  << 24 |\n                    tfdt[9]  << 16 |\n                    tfdt[10] <<  8 |\n                    tfdt[11];\n        }\n        return result;\n      })[0];\n      baseTime = baseTime || Infinity;\n\n      // convert base time to seconds\n      return baseTime / scale;\n    });\n  }));\n\n  // return the minimum\n  result = Math.min.apply(null, baseTimes);\n  return isFinite(result) ? result : 0;\n};\n\nmodule.exports = {\n  parseType: parseType,\n  timescale: timescale,\n  startTime: startTime\n};\n","/**\n * @file decrypter.js\n *\n * An asynchronous implementation of AES-128 CBC decryption with\n * PKCS#7 padding.\n */\n\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar _aes = require('./aes');\n\nvar _aes2 = _interopRequireDefault(_aes);\n\nvar _asyncStream = require('./async-stream');\n\nvar _asyncStream2 = _interopRequireDefault(_asyncStream);\n\nvar _pkcs7 = require('pkcs7');\n\n/**\n * Convert network-order (big-endian) bytes into their little-endian\n * representation.\n */\nvar ntoh = function ntoh(word) {\n  return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n};\n\n/**\n * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n *\n * @param {Uint8Array} encrypted the encrypted bytes\n * @param {Uint32Array} key the bytes of the decryption key\n * @param {Uint32Array} initVector the initialization vector (IV) to\n * use for the first round of CBC.\n * @return {Uint8Array} the decrypted bytes\n *\n * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n * @see https://tools.ietf.org/html/rfc2315\n */\nvar decrypt = function decrypt(encrypted, key, initVector) {\n  // word-level access to the encrypted bytes\n  var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n\n  var decipher = new _aes2['default'](Array.prototype.slice.call(key));\n\n  // byte and word-level access for the decrypted output\n  var decrypted = new Uint8Array(encrypted.byteLength);\n  var decrypted32 = new Int32Array(decrypted.buffer);\n\n  // temporary variables for working with the IV, encrypted, and\n  // decrypted data\n  var init0 = undefined;\n  var init1 = undefined;\n  var init2 = undefined;\n  var init3 = undefined;\n  var encrypted0 = undefined;\n  var encrypted1 = undefined;\n  var encrypted2 = undefined;\n  var encrypted3 = undefined;\n\n  // iteration variable\n  var wordIx = undefined;\n\n  // pull out the words of the IV to ensure we don't modify the\n  // passed-in reference and easier access\n  init0 = initVector[0];\n  init1 = initVector[1];\n  init2 = initVector[2];\n  init3 = initVector[3];\n\n  // decrypt four word sequences, applying cipher-block chaining (CBC)\n  // to each decrypted block\n  for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n    // convert big-endian (network order) words into little-endian\n    // (javascript order)\n    encrypted0 = ntoh(encrypted32[wordIx]);\n    encrypted1 = ntoh(encrypted32[wordIx + 1]);\n    encrypted2 = ntoh(encrypted32[wordIx + 2]);\n    encrypted3 = ntoh(encrypted32[wordIx + 3]);\n\n    // decrypt the block\n    decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx);\n\n    // XOR with the IV, and restore network byte-order to obtain the\n    // plaintext\n    decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n    decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n    decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n    decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3);\n\n    // setup the IV for the next round\n    init0 = encrypted0;\n    init1 = encrypted1;\n    init2 = encrypted2;\n    init3 = encrypted3;\n  }\n\n  return decrypted;\n};\n\nexports.decrypt = decrypt;\n/**\n * The `Decrypter` class that manages decryption of AES\n * data through `AsyncStream` objects and the `decrypt`\n * function\n *\n * @param {Uint8Array} encrypted the encrypted bytes\n * @param {Uint32Array} key the bytes of the decryption key\n * @param {Uint32Array} initVector the initialization vector (IV) to\n * @param {Function} done the function to run when done\n * @class Decrypter\n */\n\nvar Decrypter = (function () {\n  function Decrypter(encrypted, key, initVector, done) {\n    _classCallCheck(this, Decrypter);\n\n    var step = Decrypter.STEP;\n    var encrypted32 = new Int32Array(encrypted.buffer);\n    var decrypted = new Uint8Array(encrypted.byteLength);\n    var i = 0;\n\n    this.asyncStream_ = new _asyncStream2['default']();\n\n    // split up the encryption job and do the individual chunks asynchronously\n    this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n    for (i = step; i < encrypted32.length; i += step) {\n      initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n    }\n    // invoke the done() callback when everything is finished\n    this.asyncStream_.push(function () {\n      // remove pkcs#7 padding from the decrypted bytes\n      done(null, (0, _pkcs7.unpad)(decrypted));\n    });\n  }\n\n  /**\n   * a getter for step the maximum number of bytes to process at one time\n   *\n   * @return {Number} the value of step 32000\n   */\n\n  _createClass(Decrypter, [{\n    key: 'decryptChunk_',\n\n    /**\n     * @private\n     */\n    value: function decryptChunk_(encrypted, key, initVector, decrypted) {\n      return function () {\n        var bytes = decrypt(encrypted, key, initVector);\n\n        decrypted.set(bytes, encrypted.byteOffset);\n      };\n    }\n  }], [{\n    key: 'STEP',\n    get: function get() {\n      // 4 * 8000;\n      return 32000;\n    }\n  }]);\n\n  return Decrypter;\n})();\n\nexports.Decrypter = Decrypter;\nexports['default'] = {\n  Decrypter: Decrypter,\n  decrypt: decrypt\n};","function clean (s) {\n  return s.replace(/\\n\\r?\\s*/g, '')\n}\n\n\nmodule.exports = function tsml (sa) {\n  var s = ''\n    , i = 0\n\n  for (; i < arguments.length; i++)\n    s += clean(sa[i]) + (arguments[i + 1] || '')\n\n  return s\n}","var getBuiltIn = require('../internals/get-built-in');\n\nmodule.exports = getBuiltIn('document', 'documentElement');\n","module.exports = function (it) {\n  if (typeof it != 'function') {\n    throw TypeError(String(it) + ' is not a function');\n  } return it;\n};\n","'use strict'\n\nexports.randomBytes = exports.rng = exports.pseudoRandomBytes = exports.prng = require('randombytes')\nexports.createHash = exports.Hash = require('create-hash')\nexports.createHmac = exports.Hmac = require('create-hmac')\n\nvar algos = require('browserify-sign/algos')\nvar algoKeys = Object.keys(algos)\nvar hashes = ['sha1', 'sha224', 'sha256', 'sha384', 'sha512', 'md5', 'rmd160'].concat(algoKeys)\nexports.getHashes = function () {\n  return hashes\n}\n\nvar p = require('pbkdf2')\nexports.pbkdf2 = p.pbkdf2\nexports.pbkdf2Sync = p.pbkdf2Sync\n\nvar aes = require('browserify-cipher')\n\nexports.Cipher = aes.Cipher\nexports.createCipher = aes.createCipher\nexports.Cipheriv = aes.Cipheriv\nexports.createCipheriv = aes.createCipheriv\nexports.Decipher = aes.Decipher\nexports.createDecipher = aes.createDecipher\nexports.Decipheriv = aes.Decipheriv\nexports.createDecipheriv = aes.createDecipheriv\nexports.getCiphers = aes.getCiphers\nexports.listCiphers = aes.listCiphers\n\nvar dh = require('diffie-hellman')\n\nexports.DiffieHellmanGroup = dh.DiffieHellmanGroup\nexports.createDiffieHellmanGroup = dh.createDiffieHellmanGroup\nexports.getDiffieHellman = dh.getDiffieHellman\nexports.createDiffieHellman = dh.createDiffieHellman\nexports.DiffieHellman = dh.DiffieHellman\n\nvar sign = require('browserify-sign')\n\nexports.createSign = sign.createSign\nexports.Sign = sign.Sign\nexports.createVerify = sign.createVerify\nexports.Verify = sign.Verify\n\nexports.createECDH = require('create-ecdh')\n\nvar publicEncrypt = require('public-encrypt')\n\nexports.publicEncrypt = publicEncrypt.publicEncrypt\nexports.privateEncrypt = publicEncrypt.privateEncrypt\nexports.publicDecrypt = publicEncrypt.publicDecrypt\nexports.privateDecrypt = publicEncrypt.privateDecrypt\n\n// the least I can do is make error messages for the rest of the node.js/crypto api.\n// ;[\n//   'createCredentials'\n// ].forEach(function (name) {\n//   exports[name] = function () {\n//     throw new Error([\n//       'sorry, ' + name + ' is not implemented yet',\n//       'we accept pull requests',\n//       'https://github.com/crypto-browserify/crypto-browserify'\n//     ].join('\\n'))\n//   }\n// })\n\nvar rf = require('randomfill')\n\nexports.randomFill = rf.randomFill\nexports.randomFillSync = rf.randomFillSync\n\nexports.createCredentials = function () {\n  throw new Error([\n    'sorry, createCredentials is not implemented yet',\n    'we accept pull requests',\n    'https://github.com/crypto-browserify/crypto-browserify'\n  ].join('\\n'))\n}\n\nexports.constants = {\n  'DH_CHECK_P_NOT_SAFE_PRIME': 2,\n  'DH_CHECK_P_NOT_PRIME': 1,\n  'DH_UNABLE_TO_CHECK_GENERATOR': 4,\n  'DH_NOT_SUITABLE_GENERATOR': 8,\n  'NPN_ENABLED': 1,\n  'ALPN_ENABLED': 1,\n  'RSA_PKCS1_PADDING': 1,\n  'RSA_SSLV23_PADDING': 2,\n  'RSA_NO_PADDING': 3,\n  'RSA_PKCS1_OAEP_PADDING': 4,\n  'RSA_X931_PADDING': 5,\n  'RSA_PKCS1_PSS_PADDING': 6,\n  'POINT_CONVERSION_COMPRESSED': 2,\n  'POINT_CONVERSION_UNCOMPRESSED': 4,\n  'POINT_CONVERSION_HYBRID': 6\n}\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar SAFE_CLOSING = false;\n\ntry {\n  var called = 0;\n  var iteratorWithReturn = {\n    next: function () {\n      return { done: !!called++ };\n    },\n    'return': function () {\n      SAFE_CLOSING = true;\n    }\n  };\n  iteratorWithReturn[ITERATOR] = function () {\n    return this;\n  };\n  // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing\n  Array.from(iteratorWithReturn, function () { throw 2; });\n} catch (error) { /* empty */ }\n\nmodule.exports = function (exec, SKIP_CLOSING) {\n  if (!SKIP_CLOSING && !SAFE_CLOSING) return false;\n  var ITERATION_SUPPORT = false;\n  try {\n    var object = {};\n    object[ITERATOR] = function () {\n      return {\n        next: function () {\n          return { done: ITERATION_SUPPORT = true };\n        }\n      };\n    };\n    exec(object);\n  } catch (error) { /* empty */ }\n  return ITERATION_SUPPORT;\n};\n","var userAgent = require('../internals/engine-user-agent');\n\nmodule.exports = /(iphone|ipod|ipad).*applewebkit/i.test(userAgent);\n","import { top, bottom, left, right } from \"../enums.js\";\nimport detectOverflow from \"../utils/detectOverflow.js\";\n\nfunction getSideOffsets(overflow, rect, preventedOffsets) {\n  if (preventedOffsets === void 0) {\n    preventedOffsets = {\n      x: 0,\n      y: 0\n    };\n  }\n\n  return {\n    top: overflow.top - rect.height - preventedOffsets.y,\n    right: overflow.right - rect.width + preventedOffsets.x,\n    bottom: overflow.bottom - rect.height + preventedOffsets.y,\n    left: overflow.left - rect.width - preventedOffsets.x\n  };\n}\n\nfunction isAnySideFullyClipped(overflow) {\n  return [top, right, bottom, left].some(function (side) {\n    return overflow[side] >= 0;\n  });\n}\n\nfunction hide(_ref) {\n  var state = _ref.state,\n      name = _ref.name;\n  var referenceRect = state.rects.reference;\n  var popperRect = state.rects.popper;\n  var preventedOffsets = state.modifiersData.preventOverflow;\n  var referenceOverflow = detectOverflow(state, {\n    elementContext: 'reference'\n  });\n  var popperAltOverflow = detectOverflow(state, {\n    altBoundary: true\n  });\n  var referenceClippingOffsets = getSideOffsets(referenceOverflow, referenceRect);\n  var popperEscapeOffsets = getSideOffsets(popperAltOverflow, popperRect, preventedOffsets);\n  var isReferenceHidden = isAnySideFullyClipped(referenceClippingOffsets);\n  var hasPopperEscaped = isAnySideFullyClipped(popperEscapeOffsets);\n  state.modifiersData[name] = {\n    referenceClippingOffsets: referenceClippingOffsets,\n    popperEscapeOffsets: popperEscapeOffsets,\n    isReferenceHidden: isReferenceHidden,\n    hasPopperEscaped: hasPopperEscaped\n  };\n  state.attributes.popper = Object.assign({}, state.attributes.popper, {\n    'data-popper-reference-hidden': isReferenceHidden,\n    'data-popper-escaped': hasPopperEscaped\n  });\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'hide',\n  enabled: true,\n  phase: 'main',\n  requiresIfExists: ['preventOverflow'],\n  fn: hide\n};","// `RequireObjectCoercible` abstract operation\n// https://tc39.es/ecma262/#sec-requireobjectcoercible\nmodule.exports = function (it) {\n  if (it == undefined) throw TypeError(\"Can't call method on \" + it);\n  return it;\n};\n","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {\n  try {\n    var info = gen[key](arg);\n    var value = info.value;\n  } catch (error) {\n    reject(error);\n    return;\n  }\n\n  if (info.done) {\n    resolve(value);\n  } else {\n    Promise.resolve(value).then(_next, _throw);\n  }\n}\n\nexport default function _asyncToGenerator(fn) {\n  return function () {\n    var self = this,\n        args = arguments;\n    return new Promise(function (resolve, reject) {\n      var gen = fn.apply(self, args);\n\n      function _next(value) {\n        asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);\n      }\n\n      function _throw(err) {\n        asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);\n      }\n\n      _next(undefined);\n    });\n  };\n}","var fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (METHOD_NAME) {\n  // We can't use this feature detection in V8 since it causes\n  // deoptimization and serious performance degradation\n  // https://github.com/zloirock/core-js/issues/677\n  return V8_VERSION >= 51 || !fails(function () {\n    var array = [];\n    var constructor = array.constructor = {};\n    constructor[SPECIES] = function () {\n      return { foo: 1 };\n    };\n    return array[METHOD_NAME](Boolean).foo !== 1;\n  });\n};\n","var CipherBase = require('cipher-base')\nvar des = require('des.js')\nvar inherits = require('inherits')\nvar Buffer = require('safe-buffer').Buffer\n\nvar modes = {\n  'des-ede3-cbc': des.CBC.instantiate(des.EDE),\n  'des-ede3': des.EDE,\n  'des-ede-cbc': des.CBC.instantiate(des.EDE),\n  'des-ede': des.EDE,\n  'des-cbc': des.CBC.instantiate(des.DES),\n  'des-ecb': des.DES\n}\nmodes.des = modes['des-cbc']\nmodes.des3 = modes['des-ede3-cbc']\nmodule.exports = DES\ninherits(DES, CipherBase)\nfunction DES (opts) {\n  CipherBase.call(this)\n  var modeName = opts.mode.toLowerCase()\n  var mode = modes[modeName]\n  var type\n  if (opts.decrypt) {\n    type = 'decrypt'\n  } else {\n    type = 'encrypt'\n  }\n  var key = opts.key\n  if (!Buffer.isBuffer(key)) {\n    key = Buffer.from(key)\n  }\n  if (modeName === 'des-ede' || modeName === 'des-ede-cbc') {\n    key = Buffer.concat([key, key.slice(0, 8)])\n  }\n  var iv = opts.iv\n  if (!Buffer.isBuffer(iv)) {\n    iv = Buffer.from(iv)\n  }\n  this._des = mode.create({\n    key: key,\n    iv: iv,\n    type: type\n  })\n}\nDES.prototype._update = function (data) {\n  return Buffer.from(this._des.update(data))\n}\nDES.prototype._final = function () {\n  return Buffer.from(this._des.final())\n}\n","export { default as applyStyles } from \"./applyStyles.js\";\nexport { default as arrow } from \"./arrow.js\";\nexport { default as computeStyles } from \"./computeStyles.js\";\nexport { default as eventListeners } from \"./eventListeners.js\";\nexport { default as flip } from \"./flip.js\";\nexport { default as hide } from \"./hide.js\";\nexport { default as offset } from \"./offset.js\";\nexport { default as popperOffsets } from \"./popperOffsets.js\";\nexport { default as preventOverflow } from \"./preventOverflow.js\";","'use strict'\n\nexports.byteLength = byteLength\nexports.toByteArray = toByteArray\nexports.fromByteArray = fromByteArray\n\nvar lookup = []\nvar revLookup = []\nvar Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array\n\nvar code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'\nfor (var i = 0, len = code.length; i < len; ++i) {\n  lookup[i] = code[i]\n  revLookup[code.charCodeAt(i)] = i\n}\n\n// Support decoding URL-safe base64 strings, as Node.js does.\n// See: https://en.wikipedia.org/wiki/Base64#URL_applications\nrevLookup['-'.charCodeAt(0)] = 62\nrevLookup['_'.charCodeAt(0)] = 63\n\nfunction getLens (b64) {\n  var len = b64.length\n\n  if (len % 4 > 0) {\n    throw new Error('Invalid string. Length must be a multiple of 4')\n  }\n\n  // Trim off extra bytes after placeholder bytes are found\n  // See: https://github.com/beatgammit/base64-js/issues/42\n  var validLen = b64.indexOf('=')\n  if (validLen === -1) validLen = len\n\n  var placeHoldersLen = validLen === len\n    ? 0\n    : 4 - (validLen % 4)\n\n  return [validLen, placeHoldersLen]\n}\n\n// base64 is 4/3 + up to two characters of the original data\nfunction byteLength (b64) {\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction _byteLength (b64, validLen, placeHoldersLen) {\n  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen\n}\n\nfunction toByteArray (b64) {\n  var tmp\n  var lens = getLens(b64)\n  var validLen = lens[0]\n  var placeHoldersLen = lens[1]\n\n  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))\n\n  var curByte = 0\n\n  // if there are placeholders, only get up to the last complete 4 chars\n  var len = placeHoldersLen > 0\n    ? validLen - 4\n    : validLen\n\n  var i\n  for (i = 0; i < len; i += 4) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 18) |\n      (revLookup[b64.charCodeAt(i + 1)] << 12) |\n      (revLookup[b64.charCodeAt(i + 2)] << 6) |\n      revLookup[b64.charCodeAt(i + 3)]\n    arr[curByte++] = (tmp >> 16) & 0xFF\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 2) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 2) |\n      (revLookup[b64.charCodeAt(i + 1)] >> 4)\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  if (placeHoldersLen === 1) {\n    tmp =\n      (revLookup[b64.charCodeAt(i)] << 10) |\n      (revLookup[b64.charCodeAt(i + 1)] << 4) |\n      (revLookup[b64.charCodeAt(i + 2)] >> 2)\n    arr[curByte++] = (tmp >> 8) & 0xFF\n    arr[curByte++] = tmp & 0xFF\n  }\n\n  return arr\n}\n\nfunction tripletToBase64 (num) {\n  return lookup[num >> 18 & 0x3F] +\n    lookup[num >> 12 & 0x3F] +\n    lookup[num >> 6 & 0x3F] +\n    lookup[num & 0x3F]\n}\n\nfunction encodeChunk (uint8, start, end) {\n  var tmp\n  var output = []\n  for (var i = start; i < end; i += 3) {\n    tmp =\n      ((uint8[i] << 16) & 0xFF0000) +\n      ((uint8[i + 1] << 8) & 0xFF00) +\n      (uint8[i + 2] & 0xFF)\n    output.push(tripletToBase64(tmp))\n  }\n  return output.join('')\n}\n\nfunction fromByteArray (uint8) {\n  var tmp\n  var len = uint8.length\n  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes\n  var parts = []\n  var maxChunkLength = 16383 // must be multiple of 3\n\n  // go through the array every three bytes, we'll deal with trailing stuff later\n  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {\n    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))\n  }\n\n  // pad the end with zeros, but make sure to not forget the extra bytes\n  if (extraBytes === 1) {\n    tmp = uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 2] +\n      lookup[(tmp << 4) & 0x3F] +\n      '=='\n    )\n  } else if (extraBytes === 2) {\n    tmp = (uint8[len - 2] << 8) + uint8[len - 1]\n    parts.push(\n      lookup[tmp >> 10] +\n      lookup[(tmp >> 4) & 0x3F] +\n      lookup[(tmp << 2) & 0x3F] +\n      '='\n    )\n  }\n\n  return parts.join('')\n}\n","export default function getWindow(node) {\n  if (node == null) {\n    return window;\n  }\n\n  if (node.toString() !== '[object Window]') {\n    var ownerDocument = node.ownerDocument;\n    return ownerDocument ? ownerDocument.defaultView || window : window;\n  }\n\n  return node;\n}","'use strict';\n\nvar assert = require('minimalistic-assert');\nvar inherits = require('inherits');\n\nvar Cipher = require('./cipher');\nvar DES = require('./des');\n\nfunction EDEState(type, key) {\n  assert.equal(key.length, 24, 'Invalid key length');\n\n  var k1 = key.slice(0, 8);\n  var k2 = key.slice(8, 16);\n  var k3 = key.slice(16, 24);\n\n  if (type === 'encrypt') {\n    this.ciphers = [\n      DES.create({ type: 'encrypt', key: k1 }),\n      DES.create({ type: 'decrypt', key: k2 }),\n      DES.create({ type: 'encrypt', key: k3 })\n    ];\n  } else {\n    this.ciphers = [\n      DES.create({ type: 'decrypt', key: k3 }),\n      DES.create({ type: 'encrypt', key: k2 }),\n      DES.create({ type: 'decrypt', key: k1 })\n    ];\n  }\n}\n\nfunction EDE(options) {\n  Cipher.call(this, options);\n\n  var state = new EDEState(this.type, this.options.key);\n  this._edeState = state;\n}\ninherits(EDE, Cipher);\n\nmodule.exports = EDE;\n\nEDE.create = function create(options) {\n  return new EDE(options);\n};\n\nEDE.prototype._update = function _update(inp, inOff, out, outOff) {\n  var state = this._edeState;\n\n  state.ciphers[0]._update(inp, inOff, out, outOff);\n  state.ciphers[1]._update(out, outOff, out, outOff);\n  state.ciphers[2]._update(out, outOff, out, outOff);\n};\n\nEDE.prototype._pad = DES.prototype._pad;\nEDE.prototype._unpad = DES.prototype._unpad;\n","var Buffer = require('safe-buffer').Buffer\n\nvar checkParameters = require('./precondition')\nvar defaultEncoding = require('./default-encoding')\nvar sync = require('./sync')\nvar toBuffer = require('./to-buffer')\n\nvar ZERO_BUF\nvar subtle = global.crypto && global.crypto.subtle\nvar toBrowser = {\n  sha: 'SHA-1',\n  'sha-1': 'SHA-1',\n  sha1: 'SHA-1',\n  sha256: 'SHA-256',\n  'sha-256': 'SHA-256',\n  sha384: 'SHA-384',\n  'sha-384': 'SHA-384',\n  'sha-512': 'SHA-512',\n  sha512: 'SHA-512'\n}\nvar checks = []\nfunction checkNative (algo) {\n  if (global.process && !global.process.browser) {\n    return Promise.resolve(false)\n  }\n  if (!subtle || !subtle.importKey || !subtle.deriveBits) {\n    return Promise.resolve(false)\n  }\n  if (checks[algo] !== undefined) {\n    return checks[algo]\n  }\n  ZERO_BUF = ZERO_BUF || Buffer.alloc(8)\n  var prom = browserPbkdf2(ZERO_BUF, ZERO_BUF, 10, 128, algo)\n    .then(function () {\n      return true\n    }).catch(function () {\n      return false\n    })\n  checks[algo] = prom\n  return prom\n}\nvar nextTick\nfunction getNextTick () {\n  if (nextTick) {\n    return nextTick\n  }\n  if (global.process && global.process.nextTick) {\n    nextTick = global.process.nextTick\n  } else if (global.queueMicrotask) {\n    nextTick = global.queueMicrotask\n  } else if (global.setImmediate) {\n    nextTick = global.setImmediate\n  } else {\n    nextTick = global.setTimeout\n  }\n  return nextTick\n}\nfunction browserPbkdf2 (password, salt, iterations, length, algo) {\n  return subtle.importKey(\n    'raw', password, { name: 'PBKDF2' }, false, ['deriveBits']\n  ).then(function (key) {\n    return subtle.deriveBits({\n      name: 'PBKDF2',\n      salt: salt,\n      iterations: iterations,\n      hash: {\n        name: algo\n      }\n    }, key, length << 3)\n  }).then(function (res) {\n    return Buffer.from(res)\n  })\n}\n\nfunction resolvePromise (promise, callback) {\n  promise.then(function (out) {\n    getNextTick()(function () {\n      callback(null, out)\n    })\n  }, function (e) {\n    getNextTick()(function () {\n      callback(e)\n    })\n  })\n}\nmodule.exports = function (password, salt, iterations, keylen, digest, callback) {\n  if (typeof digest === 'function') {\n    callback = digest\n    digest = undefined\n  }\n\n  digest = digest || 'sha1'\n  var algo = toBrowser[digest.toLowerCase()]\n\n  if (!algo || typeof global.Promise !== 'function') {\n    getNextTick()(function () {\n      var out\n      try {\n        out = sync(password, salt, iterations, keylen, digest)\n      } catch (e) {\n        return callback(e)\n      }\n      callback(null, out)\n    })\n    return\n  }\n\n  checkParameters(iterations, keylen)\n  password = toBuffer(password, defaultEncoding, 'Password')\n  salt = toBuffer(salt, defaultEncoding, 'Salt')\n  if (typeof callback !== 'function') throw new Error('No callback provided to pbkdf2')\n\n  resolvePromise(checkNative(algo).then(function (resp) {\n    if (resp) return browserPbkdf2(password, salt, iterations, keylen, algo)\n\n    return sync(password, salt, iterations, keylen, digest)\n  }), callback)\n}\n","'use strict';\n\nconst decoders = exports;\n\ndecoders.der = require('./der');\ndecoders.pem = require('./pem');\n","var dom = require('./dom')\nexports.DOMImplementation = dom.DOMImplementation\nexports.XMLSerializer = dom.XMLSerializer\nexports.DOMParser = require('./dom-parser').DOMParser\n","'use strict';\n\nvar utils = require('./utils');\nvar assert = require('minimalistic-assert');\n\nfunction Hmac(hash, key, enc) {\n  if (!(this instanceof Hmac))\n    return new Hmac(hash, key, enc);\n  this.Hash = hash;\n  this.blockSize = hash.blockSize / 8;\n  this.outSize = hash.outSize / 8;\n  this.inner = null;\n  this.outer = null;\n\n  this._init(utils.toArray(key, enc));\n}\nmodule.exports = Hmac;\n\nHmac.prototype._init = function init(key) {\n  // Shorten key, if needed\n  if (key.length > this.blockSize)\n    key = new this.Hash().update(key).digest();\n  assert(key.length <= this.blockSize);\n\n  // Add padding to key\n  for (var i = key.length; i < this.blockSize; i++)\n    key.push(0);\n\n  for (i = 0; i < key.length; i++)\n    key[i] ^= 0x36;\n  this.inner = new this.Hash().update(key);\n\n  // 0x36 ^ 0x5c = 0x6a\n  for (i = 0; i < key.length; i++)\n    key[i] ^= 0x6a;\n  this.outer = new this.Hash().update(key);\n};\n\nHmac.prototype.update = function update(msg, enc) {\n  this.inner.update(msg, enc);\n  return this;\n};\n\nHmac.prototype.digest = function digest(enc) {\n  this.outer.update(this.inner.digest());\n  return this.outer.digest(enc);\n};\n",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory();\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\troot.CryptoJS = factory();\n\t}\n}(this, function () {\n\n\t/*globals window, global, require*/\n\n\t/**\n\t * CryptoJS core components.\n\t */\n\tvar CryptoJS = CryptoJS || (function (Math, undefined) {\n\n\t    var crypto;\n\n\t    // Native crypto from window (Browser)\n\t    if (typeof window !== 'undefined' && window.crypto) {\n\t        crypto = window.crypto;\n\t    }\n\n\t    // Native (experimental IE 11) crypto from window (Browser)\n\t    if (!crypto && typeof window !== 'undefined' && window.msCrypto) {\n\t        crypto = window.msCrypto;\n\t    }\n\n\t    // Native crypto from global (NodeJS)\n\t    if (!crypto && typeof global !== 'undefined' && global.crypto) {\n\t        crypto = global.crypto;\n\t    }\n\n\t    // Native crypto import via require (NodeJS)\n\t    if (!crypto && typeof require === 'function') {\n\t        try {\n\t            crypto = require('crypto');\n\t        } catch (err) {}\n\t    }\n\n\t    /*\n\t     * Cryptographically secure pseudorandom number generator\n\t     *\n\t     * As Math.random() is cryptographically not safe to use\n\t     */\n\t    var cryptoSecureRandomInt = function () {\n\t        if (crypto) {\n\t            // Use getRandomValues method (Browser)\n\t            if (typeof crypto.getRandomValues === 'function') {\n\t                try {\n\t                    return crypto.getRandomValues(new Uint32Array(1))[0];\n\t                } catch (err) {}\n\t            }\n\n\t            // Use randomBytes method (NodeJS)\n\t            if (typeof crypto.randomBytes === 'function') {\n\t                try {\n\t                    return crypto.randomBytes(4).readInt32LE();\n\t                } catch (err) {}\n\t            }\n\t        }\n\n\t        throw new Error('Native crypto module could not be used to get secure random number.');\n\t    };\n\n\t    /*\n\t     * Local polyfill of Object.create\n\n\t     */\n\t    var create = Object.create || (function () {\n\t        function F() {}\n\n\t        return function (obj) {\n\t            var subtype;\n\n\t            F.prototype = obj;\n\n\t            subtype = new F();\n\n\t            F.prototype = null;\n\n\t            return subtype;\n\t        };\n\t    }())\n\n\t    /**\n\t     * CryptoJS namespace.\n\t     */\n\t    var C = {};\n\n\t    /**\n\t     * Library namespace.\n\t     */\n\t    var C_lib = C.lib = {};\n\n\t    /**\n\t     * Base object for prototypal inheritance.\n\t     */\n\t    var Base = C_lib.Base = (function () {\n\n\n\t        return {\n\t            /**\n\t             * Creates a new object that inherits from this object.\n\t             *\n\t             * @param {Object} overrides Properties to copy into the new object.\n\t             *\n\t             * @return {Object} The new object.\n\t             *\n\t             * @static\n\t             *\n\t             * @example\n\t             *\n\t             *     var MyType = CryptoJS.lib.Base.extend({\n\t             *         field: 'value',\n\t             *\n\t             *         method: function () {\n\t             *         }\n\t             *     });\n\t             */\n\t            extend: function (overrides) {\n\t                // Spawn\n\t                var subtype = create(this);\n\n\t                // Augment\n\t                if (overrides) {\n\t                    subtype.mixIn(overrides);\n\t                }\n\n\t                // Create default initializer\n\t                if (!subtype.hasOwnProperty('init') || this.init === subtype.init) {\n\t                    subtype.init = function () {\n\t                        subtype.$super.init.apply(this, arguments);\n\t                    };\n\t                }\n\n\t                // Initializer's prototype is the subtype object\n\t                subtype.init.prototype = subtype;\n\n\t                // Reference supertype\n\t                subtype.$super = this;\n\n\t                return subtype;\n\t            },\n\n\t            /**\n\t             * Extends this object and runs the init method.\n\t             * Arguments to create() will be passed to init().\n\t             *\n\t             * @return {Object} The new object.\n\t             *\n\t             * @static\n\t             *\n\t             * @example\n\t             *\n\t             *     var instance = MyType.create();\n\t             */\n\t            create: function () {\n\t                var instance = this.extend();\n\t                instance.init.apply(instance, arguments);\n\n\t                return instance;\n\t            },\n\n\t            /**\n\t             * Initializes a newly created object.\n\t             * Override this method to add some logic when your objects are created.\n\t             *\n\t             * @example\n\t             *\n\t             *     var MyType = CryptoJS.lib.Base.extend({\n\t             *         init: function () {\n\t             *             // ...\n\t             *         }\n\t             *     });\n\t             */\n\t            init: function () {\n\t            },\n\n\t            /**\n\t             * Copies properties into this object.\n\t             *\n\t             * @param {Object} properties The properties to mix in.\n\t             *\n\t             * @example\n\t             *\n\t             *     MyType.mixIn({\n\t             *         field: 'value'\n\t             *     });\n\t             */\n\t            mixIn: function (properties) {\n\t                for (var propertyName in properties) {\n\t                    if (properties.hasOwnProperty(propertyName)) {\n\t                        this[propertyName] = properties[propertyName];\n\t                    }\n\t                }\n\n\t                // IE won't copy toString using the loop above\n\t                if (properties.hasOwnProperty('toString')) {\n\t                    this.toString = properties.toString;\n\t                }\n\t            },\n\n\t            /**\n\t             * Creates a copy of this object.\n\t             *\n\t             * @return {Object} The clone.\n\t             *\n\t             * @example\n\t             *\n\t             *     var clone = instance.clone();\n\t             */\n\t            clone: function () {\n\t                return this.init.prototype.extend(this);\n\t            }\n\t        };\n\t    }());\n\n\t    /**\n\t     * An array of 32-bit words.\n\t     *\n\t     * @property {Array} words The array of 32-bit words.\n\t     * @property {number} sigBytes The number of significant bytes in this word array.\n\t     */\n\t    var WordArray = C_lib.WordArray = Base.extend({\n\t        /**\n\t         * Initializes a newly created word array.\n\t         *\n\t         * @param {Array} words (Optional) An array of 32-bit words.\n\t         * @param {number} sigBytes (Optional) The number of significant bytes in the words.\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.lib.WordArray.create();\n\t         *     var wordArray = CryptoJS.lib.WordArray.create([0x00010203, 0x04050607]);\n\t         *     var wordArray = CryptoJS.lib.WordArray.create([0x00010203, 0x04050607], 6);\n\t         */\n\t        init: function (words, sigBytes) {\n\t            words = this.words = words || [];\n\n\t            if (sigBytes != undefined) {\n\t                this.sigBytes = sigBytes;\n\t            } else {\n\t                this.sigBytes = words.length * 4;\n\t            }\n\t        },\n\n\t        /**\n\t         * Converts this word array to a string.\n\t         *\n\t         * @param {Encoder} encoder (Optional) The encoding strategy to use. Default: CryptoJS.enc.Hex\n\t         *\n\t         * @return {string} The stringified word array.\n\t         *\n\t         * @example\n\t         *\n\t         *     var string = wordArray + '';\n\t         *     var string = wordArray.toString();\n\t         *     var string = wordArray.toString(CryptoJS.enc.Utf8);\n\t         */\n\t        toString: function (encoder) {\n\t            return (encoder || Hex).stringify(this);\n\t        },\n\n\t        /**\n\t         * Concatenates a word array to this word array.\n\t         *\n\t         * @param {WordArray} wordArray The word array to append.\n\t         *\n\t         * @return {WordArray} This word array.\n\t         *\n\t         * @example\n\t         *\n\t         *     wordArray1.concat(wordArray2);\n\t         */\n\t        concat: function (wordArray) {\n\t            // Shortcuts\n\t            var thisWords = this.words;\n\t            var thatWords = wordArray.words;\n\t            var thisSigBytes = this.sigBytes;\n\t            var thatSigBytes = wordArray.sigBytes;\n\n\t            // Clamp excess bits\n\t            this.clamp();\n\n\t            // Concat\n\t            if (thisSigBytes % 4) {\n\t                // Copy one byte at a time\n\t                for (var i = 0; i < thatSigBytes; i++) {\n\t                    var thatByte = (thatWords[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;\n\t                    thisWords[(thisSigBytes + i) >>> 2] |= thatByte << (24 - ((thisSigBytes + i) % 4) * 8);\n\t                }\n\t            } else {\n\t                // Copy one word at a time\n\t                for (var i = 0; i < thatSigBytes; i += 4) {\n\t                    thisWords[(thisSigBytes + i) >>> 2] = thatWords[i >>> 2];\n\t                }\n\t            }\n\t            this.sigBytes += thatSigBytes;\n\n\t            // Chainable\n\t            return this;\n\t        },\n\n\t        /**\n\t         * Removes insignificant bits.\n\t         *\n\t         * @example\n\t         *\n\t         *     wordArray.clamp();\n\t         */\n\t        clamp: function () {\n\t            // Shortcuts\n\t            var words = this.words;\n\t            var sigBytes = this.sigBytes;\n\n\t            // Clamp\n\t            words[sigBytes >>> 2] &= 0xffffffff << (32 - (sigBytes % 4) * 8);\n\t            words.length = Math.ceil(sigBytes / 4);\n\t        },\n\n\t        /**\n\t         * Creates a copy of this word array.\n\t         *\n\t         * @return {WordArray} The clone.\n\t         *\n\t         * @example\n\t         *\n\t         *     var clone = wordArray.clone();\n\t         */\n\t        clone: function () {\n\t            var clone = Base.clone.call(this);\n\t            clone.words = this.words.slice(0);\n\n\t            return clone;\n\t        },\n\n\t        /**\n\t         * Creates a word array filled with random bytes.\n\t         *\n\t         * @param {number} nBytes The number of random bytes to generate.\n\t         *\n\t         * @return {WordArray} The random word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.lib.WordArray.random(16);\n\t         */\n\t        random: function (nBytes) {\n\t            var words = [];\n\n\t            for (var i = 0; i < nBytes; i += 4) {\n\t                words.push(cryptoSecureRandomInt());\n\t            }\n\n\t            return new WordArray.init(words, nBytes);\n\t        }\n\t    });\n\n\t    /**\n\t     * Encoder namespace.\n\t     */\n\t    var C_enc = C.enc = {};\n\n\t    /**\n\t     * Hex encoding strategy.\n\t     */\n\t    var Hex = C_enc.Hex = {\n\t        /**\n\t         * Converts a word array to a hex string.\n\t         *\n\t         * @param {WordArray} wordArray The word array.\n\t         *\n\t         * @return {string} The hex string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var hexString = CryptoJS.enc.Hex.stringify(wordArray);\n\t         */\n\t        stringify: function (wordArray) {\n\t            // Shortcuts\n\t            var words = wordArray.words;\n\t            var sigBytes = wordArray.sigBytes;\n\n\t            // Convert\n\t            var hexChars = [];\n\t            for (var i = 0; i < sigBytes; i++) {\n\t                var bite = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;\n\t                hexChars.push((bite >>> 4).toString(16));\n\t                hexChars.push((bite & 0x0f).toString(16));\n\t            }\n\n\t            return hexChars.join('');\n\t        },\n\n\t        /**\n\t         * Converts a hex string to a word array.\n\t         *\n\t         * @param {string} hexStr The hex string.\n\t         *\n\t         * @return {WordArray} The word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.enc.Hex.parse(hexString);\n\t         */\n\t        parse: function (hexStr) {\n\t            // Shortcut\n\t            var hexStrLength = hexStr.length;\n\n\t            // Convert\n\t            var words = [];\n\t            for (var i = 0; i < hexStrLength; i += 2) {\n\t                words[i >>> 3] |= parseInt(hexStr.substr(i, 2), 16) << (24 - (i % 8) * 4);\n\t            }\n\n\t            return new WordArray.init(words, hexStrLength / 2);\n\t        }\n\t    };\n\n\t    /**\n\t     * Latin1 encoding strategy.\n\t     */\n\t    var Latin1 = C_enc.Latin1 = {\n\t        /**\n\t         * Converts a word array to a Latin1 string.\n\t         *\n\t         * @param {WordArray} wordArray The word array.\n\t         *\n\t         * @return {string} The Latin1 string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var latin1String = CryptoJS.enc.Latin1.stringify(wordArray);\n\t         */\n\t        stringify: function (wordArray) {\n\t            // Shortcuts\n\t            var words = wordArray.words;\n\t            var sigBytes = wordArray.sigBytes;\n\n\t            // Convert\n\t            var latin1Chars = [];\n\t            for (var i = 0; i < sigBytes; i++) {\n\t                var bite = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;\n\t                latin1Chars.push(String.fromCharCode(bite));\n\t            }\n\n\t            return latin1Chars.join('');\n\t        },\n\n\t        /**\n\t         * Converts a Latin1 string to a word array.\n\t         *\n\t         * @param {string} latin1Str The Latin1 string.\n\t         *\n\t         * @return {WordArray} The word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.enc.Latin1.parse(latin1String);\n\t         */\n\t        parse: function (latin1Str) {\n\t            // Shortcut\n\t            var latin1StrLength = latin1Str.length;\n\n\t            // Convert\n\t            var words = [];\n\t            for (var i = 0; i < latin1StrLength; i++) {\n\t                words[i >>> 2] |= (latin1Str.charCodeAt(i) & 0xff) << (24 - (i % 4) * 8);\n\t            }\n\n\t            return new WordArray.init(words, latin1StrLength);\n\t        }\n\t    };\n\n\t    /**\n\t     * UTF-8 encoding strategy.\n\t     */\n\t    var Utf8 = C_enc.Utf8 = {\n\t        /**\n\t         * Converts a word array to a UTF-8 string.\n\t         *\n\t         * @param {WordArray} wordArray The word array.\n\t         *\n\t         * @return {string} The UTF-8 string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var utf8String = CryptoJS.enc.Utf8.stringify(wordArray);\n\t         */\n\t        stringify: function (wordArray) {\n\t            try {\n\t                return decodeURIComponent(escape(Latin1.stringify(wordArray)));\n\t            } catch (e) {\n\t                throw new Error('Malformed UTF-8 data');\n\t            }\n\t        },\n\n\t        /**\n\t         * Converts a UTF-8 string to a word array.\n\t         *\n\t         * @param {string} utf8Str The UTF-8 string.\n\t         *\n\t         * @return {WordArray} The word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.enc.Utf8.parse(utf8String);\n\t         */\n\t        parse: function (utf8Str) {\n\t            return Latin1.parse(unescape(encodeURIComponent(utf8Str)));\n\t        }\n\t    };\n\n\t    /**\n\t     * Abstract buffered block algorithm template.\n\t     *\n\t     * The property blockSize must be implemented in a concrete subtype.\n\t     *\n\t     * @property {number} _minBufferSize The number of blocks that should be kept unprocessed in the buffer. Default: 0\n\t     */\n\t    var BufferedBlockAlgorithm = C_lib.BufferedBlockAlgorithm = Base.extend({\n\t        /**\n\t         * Resets this block algorithm's data buffer to its initial state.\n\t         *\n\t         * @example\n\t         *\n\t         *     bufferedBlockAlgorithm.reset();\n\t         */\n\t        reset: function () {\n\t            // Initial values\n\t            this._data = new WordArray.init();\n\t            this._nDataBytes = 0;\n\t        },\n\n\t        /**\n\t         * Adds new data to this block algorithm's buffer.\n\t         *\n\t         * @param {WordArray|string} data The data to append. Strings are converted to a WordArray using UTF-8.\n\t         *\n\t         * @example\n\t         *\n\t         *     bufferedBlockAlgorithm._append('data');\n\t         *     bufferedBlockAlgorithm._append(wordArray);\n\t         */\n\t        _append: function (data) {\n\t            // Convert string to WordArray, else assume WordArray already\n\t            if (typeof data == 'string') {\n\t                data = Utf8.parse(data);\n\t            }\n\n\t            // Append\n\t            this._data.concat(data);\n\t            this._nDataBytes += data.sigBytes;\n\t        },\n\n\t        /**\n\t         * Processes available data blocks.\n\t         *\n\t         * This method invokes _doProcessBlock(offset), which must be implemented by a concrete subtype.\n\t         *\n\t         * @param {boolean} doFlush Whether all blocks and partial blocks should be processed.\n\t         *\n\t         * @return {WordArray} The processed data.\n\t         *\n\t         * @example\n\t         *\n\t         *     var processedData = bufferedBlockAlgorithm._process();\n\t         *     var processedData = bufferedBlockAlgorithm._process(!!'flush');\n\t         */\n\t        _process: function (doFlush) {\n\t            var processedWords;\n\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\t            var dataSigBytes = data.sigBytes;\n\t            var blockSize = this.blockSize;\n\t            var blockSizeBytes = blockSize * 4;\n\n\t            // Count blocks ready\n\t            var nBlocksReady = dataSigBytes / blockSizeBytes;\n\t            if (doFlush) {\n\t                // Round up to include partial blocks\n\t                nBlocksReady = Math.ceil(nBlocksReady);\n\t            } else {\n\t                // Round down to include only full blocks,\n\t                // less the number of blocks that must remain in the buffer\n\t                nBlocksReady = Math.max((nBlocksReady | 0) - this._minBufferSize, 0);\n\t            }\n\n\t            // Count words ready\n\t            var nWordsReady = nBlocksReady * blockSize;\n\n\t            // Count bytes ready\n\t            var nBytesReady = Math.min(nWordsReady * 4, dataSigBytes);\n\n\t            // Process blocks\n\t            if (nWordsReady) {\n\t                for (var offset = 0; offset < nWordsReady; offset += blockSize) {\n\t                    // Perform concrete-algorithm logic\n\t                    this._doProcessBlock(dataWords, offset);\n\t                }\n\n\t                // Remove processed words\n\t                processedWords = dataWords.splice(0, nWordsReady);\n\t                data.sigBytes -= nBytesReady;\n\t            }\n\n\t            // Return processed words\n\t            return new WordArray.init(processedWords, nBytesReady);\n\t        },\n\n\t        /**\n\t         * Creates a copy of this object.\n\t         *\n\t         * @return {Object} The clone.\n\t         *\n\t         * @example\n\t         *\n\t         *     var clone = bufferedBlockAlgorithm.clone();\n\t         */\n\t        clone: function () {\n\t            var clone = Base.clone.call(this);\n\t            clone._data = this._data.clone();\n\n\t            return clone;\n\t        },\n\n\t        _minBufferSize: 0\n\t    });\n\n\t    /**\n\t     * Abstract hasher template.\n\t     *\n\t     * @property {number} blockSize The number of 32-bit words this hasher operates on. Default: 16 (512 bits)\n\t     */\n\t    var Hasher = C_lib.Hasher = BufferedBlockAlgorithm.extend({\n\t        /**\n\t         * Configuration options.\n\t         */\n\t        cfg: Base.extend(),\n\n\t        /**\n\t         * Initializes a newly created hasher.\n\t         *\n\t         * @param {Object} cfg (Optional) The configuration options to use for this hash computation.\n\t         *\n\t         * @example\n\t         *\n\t         *     var hasher = CryptoJS.algo.SHA256.create();\n\t         */\n\t        init: function (cfg) {\n\t            // Apply config defaults\n\t            this.cfg = this.cfg.extend(cfg);\n\n\t            // Set initial values\n\t            this.reset();\n\t        },\n\n\t        /**\n\t         * Resets this hasher to its initial state.\n\t         *\n\t         * @example\n\t         *\n\t         *     hasher.reset();\n\t         */\n\t        reset: function () {\n\t            // Reset data buffer\n\t            BufferedBlockAlgorithm.reset.call(this);\n\n\t            // Perform concrete-hasher logic\n\t            this._doReset();\n\t        },\n\n\t        /**\n\t         * Updates this hasher with a message.\n\t         *\n\t         * @param {WordArray|string} messageUpdate The message to append.\n\t         *\n\t         * @return {Hasher} This hasher.\n\t         *\n\t         * @example\n\t         *\n\t         *     hasher.update('message');\n\t         *     hasher.update(wordArray);\n\t         */\n\t        update: function (messageUpdate) {\n\t            // Append\n\t            this._append(messageUpdate);\n\n\t            // Update the hash\n\t            this._process();\n\n\t            // Chainable\n\t            return this;\n\t        },\n\n\t        /**\n\t         * Finalizes the hash computation.\n\t         * Note that the finalize operation is effectively a destructive, read-once operation.\n\t         *\n\t         * @param {WordArray|string} messageUpdate (Optional) A final message update.\n\t         *\n\t         * @return {WordArray} The hash.\n\t         *\n\t         * @example\n\t         *\n\t         *     var hash = hasher.finalize();\n\t         *     var hash = hasher.finalize('message');\n\t         *     var hash = hasher.finalize(wordArray);\n\t         */\n\t        finalize: function (messageUpdate) {\n\t            // Final message update\n\t            if (messageUpdate) {\n\t                this._append(messageUpdate);\n\t            }\n\n\t            // Perform concrete-hasher logic\n\t            var hash = this._doFinalize();\n\n\t            return hash;\n\t        },\n\n\t        blockSize: 512/32,\n\n\t        /**\n\t         * Creates a shortcut function to a hasher's object interface.\n\t         *\n\t         * @param {Hasher} hasher The hasher to create a helper for.\n\t         *\n\t         * @return {Function} The shortcut function.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var SHA256 = CryptoJS.lib.Hasher._createHelper(CryptoJS.algo.SHA256);\n\t         */\n\t        _createHelper: function (hasher) {\n\t            return function (message, cfg) {\n\t                return new hasher.init(cfg).finalize(message);\n\t            };\n\t        },\n\n\t        /**\n\t         * Creates a shortcut function to the HMAC's object interface.\n\t         *\n\t         * @param {Hasher} hasher The hasher to use in this HMAC helper.\n\t         *\n\t         * @return {Function} The shortcut function.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var HmacSHA256 = CryptoJS.lib.Hasher._createHmacHelper(CryptoJS.algo.SHA256);\n\t         */\n\t        _createHmacHelper: function (hasher) {\n\t            return function (message, key) {\n\t                return new C_algo.HMAC.init(hasher, key).finalize(message);\n\t            };\n\t        }\n\t    });\n\n\t    /**\n\t     * Algorithm namespace.\n\t     */\n\t    var C_algo = C.algo = {};\n\n\t    return C;\n\t}(Math));\n\n\n\treturn CryptoJS;\n\n}));","var anObject = require('../internals/an-object');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar iteratorClose = require('../internals/iterator-close');\n\nvar Result = function (stopped, result) {\n  this.stopped = stopped;\n  this.result = result;\n};\n\nmodule.exports = function (iterable, unboundFunction, options) {\n  var that = options && options.that;\n  var AS_ENTRIES = !!(options && options.AS_ENTRIES);\n  var IS_ITERATOR = !!(options && options.IS_ITERATOR);\n  var INTERRUPTED = !!(options && options.INTERRUPTED);\n  var fn = bind(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);\n  var iterator, iterFn, index, length, result, next, step;\n\n  var stop = function (condition) {\n    if (iterator) iteratorClose(iterator);\n    return new Result(true, condition);\n  };\n\n  var callFn = function (value) {\n    if (AS_ENTRIES) {\n      anObject(value);\n      return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);\n    } return INTERRUPTED ? fn(value, stop) : fn(value);\n  };\n\n  if (IS_ITERATOR) {\n    iterator = iterable;\n  } else {\n    iterFn = getIteratorMethod(iterable);\n    if (typeof iterFn != 'function') throw TypeError('Target is not iterable');\n    // optimisation for array iterators\n    if (isArrayIteratorMethod(iterFn)) {\n      for (index = 0, length = toLength(iterable.length); length > index; index++) {\n        result = callFn(iterable[index]);\n        if (result && result instanceof Result) return result;\n      } return new Result(false);\n    }\n    iterator = iterFn.call(iterable);\n  }\n\n  next = iterator.next;\n  while (!(step = next.call(iterator)).done) {\n    try {\n      result = callFn(step.value);\n    } catch (error) {\n      iteratorClose(iterator);\n      throw error;\n    }\n    if (typeof result == 'object' && result && result instanceof Result) return result;\n  } return new Result(false);\n};\n","'use strict';\n\nfunction ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }\n\nfunction _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\nfunction _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\nvar _require = require('buffer'),\n    Buffer = _require.Buffer;\n\nvar _require2 = require('util'),\n    inspect = _require2.inspect;\n\nvar custom = inspect && inspect.custom || 'inspect';\n\nfunction copyBuffer(src, target, offset) {\n  Buffer.prototype.copy.call(src, target, offset);\n}\n\nmodule.exports =\n/*#__PURE__*/\nfunction () {\n  function BufferList() {\n    _classCallCheck(this, BufferList);\n\n    this.head = null;\n    this.tail = null;\n    this.length = 0;\n  }\n\n  _createClass(BufferList, [{\n    key: \"push\",\n    value: function push(v) {\n      var entry = {\n        data: v,\n        next: null\n      };\n      if (this.length > 0) this.tail.next = entry;else this.head = entry;\n      this.tail = entry;\n      ++this.length;\n    }\n  }, {\n    key: \"unshift\",\n    value: function unshift(v) {\n      var entry = {\n        data: v,\n        next: this.head\n      };\n      if (this.length === 0) this.tail = entry;\n      this.head = entry;\n      ++this.length;\n    }\n  }, {\n    key: \"shift\",\n    value: function shift() {\n      if (this.length === 0) return;\n      var ret = this.head.data;\n      if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;\n      --this.length;\n      return ret;\n    }\n  }, {\n    key: \"clear\",\n    value: function clear() {\n      this.head = this.tail = null;\n      this.length = 0;\n    }\n  }, {\n    key: \"join\",\n    value: function join(s) {\n      if (this.length === 0) return '';\n      var p = this.head;\n      var ret = '' + p.data;\n\n      while (p = p.next) {\n        ret += s + p.data;\n      }\n\n      return ret;\n    }\n  }, {\n    key: \"concat\",\n    value: function concat(n) {\n      if (this.length === 0) return Buffer.alloc(0);\n      var ret = Buffer.allocUnsafe(n >>> 0);\n      var p = this.head;\n      var i = 0;\n\n      while (p) {\n        copyBuffer(p.data, ret, i);\n        i += p.data.length;\n        p = p.next;\n      }\n\n      return ret;\n    } // Consumes a specified amount of bytes or characters from the buffered data.\n\n  }, {\n    key: \"consume\",\n    value: function consume(n, hasStrings) {\n      var ret;\n\n      if (n < this.head.data.length) {\n        // `slice` is the same for buffers and strings.\n        ret = this.head.data.slice(0, n);\n        this.head.data = this.head.data.slice(n);\n      } else if (n === this.head.data.length) {\n        // First chunk is a perfect match.\n        ret = this.shift();\n      } else {\n        // Result spans more than one buffer.\n        ret = hasStrings ? this._getString(n) : this._getBuffer(n);\n      }\n\n      return ret;\n    }\n  }, {\n    key: \"first\",\n    value: function first() {\n      return this.head.data;\n    } // Consumes a specified amount of characters from the buffered data.\n\n  }, {\n    key: \"_getString\",\n    value: function _getString(n) {\n      var p = this.head;\n      var c = 1;\n      var ret = p.data;\n      n -= ret.length;\n\n      while (p = p.next) {\n        var str = p.data;\n        var nb = n > str.length ? str.length : n;\n        if (nb === str.length) ret += str;else ret += str.slice(0, n);\n        n -= nb;\n\n        if (n === 0) {\n          if (nb === str.length) {\n            ++c;\n            if (p.next) this.head = p.next;else this.head = this.tail = null;\n          } else {\n            this.head = p;\n            p.data = str.slice(nb);\n          }\n\n          break;\n        }\n\n        ++c;\n      }\n\n      this.length -= c;\n      return ret;\n    } // Consumes a specified amount of bytes from the buffered data.\n\n  }, {\n    key: \"_getBuffer\",\n    value: function _getBuffer(n) {\n      var ret = Buffer.allocUnsafe(n);\n      var p = this.head;\n      var c = 1;\n      p.data.copy(ret);\n      n -= p.data.length;\n\n      while (p = p.next) {\n        var buf = p.data;\n        var nb = n > buf.length ? buf.length : n;\n        buf.copy(ret, ret.length - n, 0, nb);\n        n -= nb;\n\n        if (n === 0) {\n          if (nb === buf.length) {\n            ++c;\n            if (p.next) this.head = p.next;else this.head = this.tail = null;\n          } else {\n            this.head = p;\n            p.data = buf.slice(nb);\n          }\n\n          break;\n        }\n\n        ++c;\n      }\n\n      this.length -= c;\n      return ret;\n    } // Make sure the linked list only shows the minimal necessary information.\n\n  }, {\n    key: custom,\n    value: function value(_, options) {\n      return inspect(this, _objectSpread({}, options, {\n        // Only inspect one level.\n        depth: 0,\n        // It should not recurse.\n        customInspect: false\n      }));\n    }\n  }]);\n\n  return BufferList;\n}();","'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _playlistLoader = require('./playlist-loader');\n\nvar _playlistLoader2 = _interopRequireDefault(_playlistLoader);\n\nvar noop = function noop() {};\n\n/**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\nvar audioTrackKind_ = function audioTrackKind_(properties) {\n  var kind = properties['default'] ? 'main' : 'alternative';\n\n  if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n    kind = 'main-desc';\n  }\n\n  return kind;\n};\n\n/**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n *        SegmentLoader to pause\n * @param {Object} mediaType\n *        Active media type\n * @function stopLoaders\n */\nvar stopLoaders = function stopLoaders(segmentLoader, mediaType) {\n  segmentLoader.abort();\n  segmentLoader.pause();\n\n  if (mediaType && mediaType.activePlaylistLoader) {\n    mediaType.activePlaylistLoader.pause();\n    mediaType.activePlaylistLoader = null;\n  }\n};\n\nexports.stopLoaders = stopLoaders;\n/**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n *        PlaylistLoader to start loading\n * @param {Object} mediaType\n *        Active media type\n * @function startLoaders\n */\nvar startLoaders = function startLoaders(playlistLoader, mediaType) {\n  // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n  // playlist loader\n  mediaType.activePlaylistLoader = playlistLoader;\n  playlistLoader.load();\n};\n\nexports.startLoaders = startLoaders;\n/**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {String} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a non-destructive resync of SegmentLoader when the active media\n *         group changes.\n * @function onGroupChanged\n */\nvar onGroupChanged = function onGroupChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoaders = settings.segmentLoaders;\n    var segmentLoader = _settings$segmentLoaders[type];\n    var mainSegmentLoader = _settings$segmentLoaders.main;\n    var mediaType = settings.mediaTypes[type];\n\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.activeGroup(activeTrack);\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      if (previousActiveLoader) {\n        // The previous group had a playlist loader but the new active group does not\n        // this means we are switching from demuxed to muxed audio. In this case we want to\n        // do a destructive reset of the main segment loader and not restart the audio\n        // loaders.\n        mainSegmentLoader.resetEverything();\n      }\n      return;\n    }\n\n    // Non-destructive resync\n    segmentLoader.resyncLoader();\n\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nexports.onGroupChanged = onGroupChanged;\n/**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {String} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a destructive reset of SegmentLoader when the active media\n *         track changes.\n * @function onTrackChanged\n */\nvar onTrackChanged = function onTrackChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoaders2 = settings.segmentLoaders;\n    var segmentLoader = _settings$segmentLoaders2[type];\n    var mainSegmentLoader = _settings$segmentLoaders2.main;\n    var mediaType = settings.mediaTypes[type];\n\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.activeGroup(activeTrack);\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active so we do not want to restart loaders\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      // when switching from demuxed audio/video to muxed audio/video (noted by no playlist\n      // loader for the audio group), we want to do a destructive reset of the main segment\n      // loader and not restart the audio loaders\n      mainSegmentLoader.resetEverything();\n      return;\n    }\n\n    if (previousActiveLoader === activeGroup.playlistLoader) {\n      // Nothing has actually changed. This can happen because track change events can fire\n      // multiple times for a \"single\" change. One for enabling the new active track, and\n      // one for disabling the track that was active\n      startLoaders(activeGroup.playlistLoader, mediaType);\n      return;\n    }\n\n    if (segmentLoader.track) {\n      // For WebVTT, set the new text track in the segmentloader\n      segmentLoader.track(activeTrack);\n    }\n\n    // destructive reset\n    segmentLoader.resetEverything();\n\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nexports.onTrackChanged = onTrackChanged;\nvar onError = {\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning (or error if the playlist is blacklisted) to\n   *         console and switches back to default audio track.\n   * @function onError.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type];\n      var mediaType = settings.mediaTypes[type];\n      var blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;\n\n      stopLoaders(segmentLoader, mediaType);\n\n      // switch back to default audio track\n      var activeTrack = mediaType.activeTrack();\n      var activeGroup = mediaType.activeGroup();\n      var id = (activeGroup.filter(function (group) {\n        return group['default'];\n      })[0] || activeGroup[0]).id;\n      var defaultTrack = mediaType.tracks[id];\n\n      if (activeTrack === defaultTrack) {\n        // Default track encountered an error. All we can do now is blacklist the current\n        // rendition and hope another will switch audio groups\n        blacklistCurrentPlaylist({\n          message: 'Problem encountered loading the default audio track.'\n        });\n        return;\n      }\n\n      _videoJs2['default'].log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n\n      for (var trackId in mediaType.tracks) {\n        mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n      }\n\n      mediaType.onTrackChanged();\n    };\n  },\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning to console and disables the active subtitle track\n   * @function onError.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type];\n      var mediaType = settings.mediaTypes[type];\n\n      _videoJs2['default'].log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n\n      stopLoaders(segmentLoader, mediaType);\n\n      var track = mediaType.activeTrack();\n\n      if (track) {\n        track.mode = 'disabled';\n      }\n\n      mediaType.onTrackChanged();\n    };\n  }\n};\n\nexports.onError = onError;\nvar setupListeners = {\n  /**\n   * Setup event listeners for audio playlist loader\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.AUDIO\n   */\n  AUDIO: function AUDIO(type, playlistLoader, settings) {\n    if (!playlistLoader) {\n      // no playlist loader means audio will be muxed with the video\n      return;\n    }\n\n    var tech = settings.tech;\n    var requestOptions = settings.requestOptions;\n    var segmentLoader = settings.segmentLoaders[type];\n\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n\n      segmentLoader.playlist(media, requestOptions);\n\n      // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions);\n\n      // If the player isn't paused, ensure that the segment loader is running\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n\n    playlistLoader.on('error', onError[type](type, settings));\n  },\n  /**\n   * Setup event listeners for subtitle playlist loader\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {\n    var tech = settings.tech;\n    var requestOptions = settings.requestOptions;\n    var segmentLoader = settings.segmentLoaders[type];\n    var mediaType = settings.mediaTypes[type];\n\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n\n      segmentLoader.playlist(media, requestOptions);\n      segmentLoader.track(mediaType.activeTrack());\n\n      // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions);\n\n      // If the player isn't paused, ensure that the segment loader is running\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n\n    playlistLoader.on('error', onError[type](type, settings));\n  }\n};\n\nexports.setupListeners = setupListeners;\nvar initialize = {\n  /**\n   * Setup PlaylistLoaders and AudioTracks for the audio groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.AUDIO\n   */\n  'AUDIO': function AUDIO(type, settings) {\n    var mode = settings.mode;\n    var hls = settings.hls;\n    var segmentLoader = settings.segmentLoaders[type];\n    var requestOptions = settings.requestOptions;\n    var mediaGroups = settings.master.mediaGroups;\n    var _settings$mediaTypes$type = settings.mediaTypes[type];\n    var groups = _settings$mediaTypes$type.groups;\n    var tracks = _settings$mediaTypes$type.tracks;\n\n    // force a default if we have none or we are not\n    // in html5 mode (the only mode to support more than one\n    // audio track)\n    if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0 || mode !== 'html5') {\n      mediaGroups[type] = { main: { 'default': { 'default': true } } };\n    }\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = undefined;\n\n        if (properties.resolvedUri) {\n          playlistLoader = new _playlistLoader2['default'](properties.resolvedUri, hls, requestOptions);\n        } else {\n          // no resolvedUri means the audio is muxed with the video when using this\n          // audio track\n          playlistLoader = null;\n        }\n\n        properties = _videoJs2['default'].mergeOptions({ id: variantLabel, playlistLoader: playlistLoader }, properties);\n\n        setupListeners[type](type, properties.playlistLoader, settings);\n\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = new _videoJs2['default'].AudioTrack({\n            id: variantLabel,\n            kind: audioTrackKind_(properties),\n            enabled: false,\n            language: properties.language,\n            'default': properties['default'],\n            label: variantLabel\n          });\n\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n\n    // setup single error event handler for the segment loader\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n  /**\n   * Setup PlaylistLoaders and TextTracks for the subtitle groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.SUBTITLES\n   */\n  'SUBTITLES': function SUBTITLES(type, settings) {\n    var tech = settings.tech;\n    var hls = settings.hls;\n    var segmentLoader = settings.segmentLoaders[type];\n    var requestOptions = settings.requestOptions;\n    var mediaGroups = settings.master.mediaGroups;\n    var _settings$mediaTypes$type2 = settings.mediaTypes[type];\n    var groups = _settings$mediaTypes$type2.groups;\n    var tracks = _settings$mediaTypes$type2.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        if (mediaGroups[type][groupId][variantLabel].forced) {\n          // Subtitle playlists with the forced attribute are not selectable in Safari.\n          // According to Apple's HLS Authoring Specification:\n          //   If content has forced subtitles and regular subtitles in a given language,\n          //   the regular subtitles track in that language MUST contain both the forced\n          //   subtitles and the regular subtitles for that language.\n          // Because of this requirement and that Safari does not add forced subtitles,\n          // forced subtitles are skipped here to maintain consistent experience across\n          // all platforms\n          continue;\n        }\n\n        var properties = mediaGroups[type][groupId][variantLabel];\n\n        properties = _videoJs2['default'].mergeOptions({\n          id: variantLabel,\n          playlistLoader: new _playlistLoader2['default'](properties.resolvedUri, hls, requestOptions)\n        }, properties);\n\n        setupListeners[type](type, properties.playlistLoader, settings);\n\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: variantLabel,\n            kind: 'subtitles',\n            enabled: false,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n\n    // setup single error event handler for the segment loader\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n  /**\n   * Setup TextTracks for the closed-caption groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize['CLOSED-CAPTIONS']\n   */\n  'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {\n    var tech = settings.tech;\n    var mediaGroups = settings.master.mediaGroups;\n    var _settings$mediaTypes$type3 = settings.mediaTypes[type];\n    var groups = _settings$mediaTypes$type3.groups;\n    var tracks = _settings$mediaTypes$type3.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n\n        // We only support CEA608 captions for now, so ignore anything that\n        // doesn't use a CCx INSTREAM-ID\n        if (!properties.instreamId.match(/CC\\d/)) {\n          continue;\n        }\n\n        // No PlaylistLoader is required for Closed-Captions because the captions are\n        // embedded within the video stream\n        groups[groupId].push(_videoJs2['default'].mergeOptions({ id: variantLabel }, properties));\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: properties.instreamId,\n            kind: 'captions',\n            enabled: false,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n  }\n};\n\nexports.initialize = initialize;\n/**\n * Returns a function used to get the active group of the provided type\n *\n * @param {String} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Function that returns the active media group for the provided type. Takes an\n *         optional parameter {TextTrack} track. If no track is provided, a list of all\n *         variants in the group, otherwise the variant corresponding to the provided\n *         track is returned.\n * @function activeGroup\n */\nvar activeGroup = function activeGroup(type, settings) {\n  return function (track) {\n    var masterPlaylistLoader = settings.masterPlaylistLoader;\n    var groups = settings.mediaTypes[type].groups;\n\n    var media = masterPlaylistLoader.media();\n\n    if (!media) {\n      return null;\n    }\n\n    var variants = null;\n\n    if (media.attributes[type]) {\n      variants = groups[media.attributes[type]];\n    }\n\n    variants = variants || groups.main;\n\n    if (typeof track === 'undefined') {\n      return variants;\n    }\n\n    if (track === null) {\n      // An active track was specified so a corresponding group is expected. track === null\n      // means no track is currently active so there is no corresponding group\n      return null;\n    }\n\n    return variants.filter(function (props) {\n      return props.id === track.id;\n    })[0] || null;\n  };\n};\n\nexports.activeGroup = activeGroup;\nvar activeTrack = {\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].enabled) {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  },\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].mode === 'showing') {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  }\n};\n\nexports.activeTrack = activeTrack;\n/**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the master manifest.\n *\n * @param {Object} settings\n *        Object containing required information for setting up the media groups\n * @param {SegmentLoader} settings.segmentLoaders.AUDIO\n *        Audio segment loader\n * @param {SegmentLoader} settings.segmentLoaders.SUBTITLES\n *        Subtitle segment loader\n * @param {SegmentLoader} settings.segmentLoaders.main\n *        Main segment loader\n * @param {Tech} settings.tech\n *        The tech of the player\n * @param {Object} settings.requestOptions\n *        XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.masterPlaylistLoader\n *        PlaylistLoader for the master source\n * @param {String} mode\n *        Mode of the hls source handler. Can be 'auto', 'html5', or 'flash'\n * @param {HlsHandler} settings.hls\n *        HLS SourceHandler\n * @param {Object} settings.master\n *        The parsed master manifest\n * @param {Object} settings.mediaTypes\n *        Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.blacklistCurrentPlaylist\n *        Blacklists the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\nvar setupMediaGroups = function setupMediaGroups(settings) {\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    initialize[type](type, settings);\n  });\n\n  var mediaTypes = settings.mediaTypes;\n  var masterPlaylistLoader = settings.masterPlaylistLoader;\n  var tech = settings.tech;\n  var hls = settings.hls;\n\n  // setup active group and track getters and change event handlers\n  ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n    mediaTypes[type].activeGroup = activeGroup(type, settings);\n    mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n    mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n    mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n  });\n\n  // DO NOT enable the default subtitle or caption track.\n  // DO enable the default audio track\n  var audioGroup = mediaTypes.AUDIO.activeGroup();\n  var groupId = (audioGroup.filter(function (group) {\n    return group['default'];\n  })[0] || audioGroup[0]).id;\n\n  mediaTypes.AUDIO.tracks[groupId].enabled = true;\n  mediaTypes.AUDIO.onTrackChanged();\n\n  masterPlaylistLoader.on('mediachange', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanged();\n    });\n  });\n\n  // custom audio track change event handler for usage event\n  var onAudioTrackChanged = function onAudioTrackChanged() {\n    mediaTypes.AUDIO.onTrackChanged();\n    tech.trigger({ type: 'usage', name: 'hls-audio-change' });\n  };\n\n  tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n  tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n\n  hls.on('dispose', function () {\n    tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n    tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  });\n\n  // clear existing audio tracks and add the ones we just created\n  tech.clearTracks('audio');\n\n  for (var id in mediaTypes.AUDIO.tracks) {\n    tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n  }\n};\n\nexports.setupMediaGroups = setupMediaGroups;\n/**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n *         Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\nvar createMediaTypes = function createMediaTypes() {\n  var mediaTypes = {};\n\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    mediaTypes[type] = {\n      groups: {},\n      tracks: {},\n      activePlaylistLoader: null,\n      activeGroup: noop,\n      activeTrack: noop,\n      onGroupChanged: noop,\n      onTrackChanged: noop\n    };\n  });\n\n  return mediaTypes;\n};\nexports.createMediaTypes = createMediaTypes;","var toInteger = require('../internals/to-integer');\n\nvar max = Math.max;\nvar min = Math.min;\n\n// Helper for a popular repeating case of the spec:\n// Let integer be ? ToInteger(index).\n// If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).\nmodule.exports = function (index, length) {\n  var integer = toInteger(index);\n  return integer < 0 ? max(integer + length, 0) : min(integer, length);\n};\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar setGlobal = require('../internals/set-global');\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\nvar isForced = require('../internals/is-forced');\n\n/*\n  options.target      - name of the target object\n  options.global      - target is the global object\n  options.stat        - export as static methods of target\n  options.proto       - export as prototype methods of target\n  options.real        - real prototype method for the `pure` version\n  options.forced      - export even if the native feature is available\n  options.bind        - bind methods to the target, required for the `pure` version\n  options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version\n  options.unsafe      - use the simple assignment of property instead of delete + defineProperty\n  options.sham        - add a flag to not completely full polyfills\n  options.enumerable  - export as enumerable property\n  options.noTargetGet - prevent calling a getter on target\n*/\nmodule.exports = function (options, source) {\n  var TARGET = options.target;\n  var GLOBAL = options.global;\n  var STATIC = options.stat;\n  var FORCED, target, key, targetProperty, sourceProperty, descriptor;\n  if (GLOBAL) {\n    target = global;\n  } else if (STATIC) {\n    target = global[TARGET] || setGlobal(TARGET, {});\n  } else {\n    target = (global[TARGET] || {}).prototype;\n  }\n  if (target) for (key in source) {\n    sourceProperty = source[key];\n    if (options.noTargetGet) {\n      descriptor = getOwnPropertyDescriptor(target, key);\n      targetProperty = descriptor && descriptor.value;\n    } else targetProperty = target[key];\n    FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);\n    // contained in target\n    if (!FORCED && targetProperty !== undefined) {\n      if (typeof sourceProperty === typeof targetProperty) continue;\n      copyConstructorProperties(sourceProperty, targetProperty);\n    }\n    // add a flag to not completely full polyfills\n    if (options.sham || (targetProperty && targetProperty.sham)) {\n      createNonEnumerableProperty(sourceProperty, 'sham', true);\n    }\n    // extend global\n    redefine(target, key, sourceProperty, options);\n  }\n};\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\nvar hiddenKeys = enumBugKeys.concat('length', 'prototype');\n\n// `Object.getOwnPropertyNames` method\n// https://tc39.es/ecma262/#sec-object.getownpropertynames\n// eslint-disable-next-line es/no-object-getownpropertynames -- safe\nexports.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {\n  return internalObjectKeys(O, hiddenKeys);\n};\n","var g;\n\n// This works in non-strict mode\ng = (function() {\n\treturn this;\n})();\n\ntry {\n\t// This works if eval is allowed (see CSP)\n\tg = g || new Function(\"return this\")();\n} catch (e) {\n\t// This works if the window reference is available\n\tif (typeof window === \"object\") g = window;\n}\n\n// g can still be undefined, but nothing to do about it...\n// We return undefined, instead of nothing here, so it's\n// easier to handle this case. if(!global) { ...}\n\nmodule.exports = g;\n","'use strict';\nvar $ = require('../internals/export');\nvar notARegExp = require('../internals/not-a-regexp');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');\n\n// `String.prototype.includes` method\n// https://tc39.es/ecma262/#sec-string.prototype.includes\n$({ target: 'String', proto: true, forced: !correctIsRegExpLogic('includes') }, {\n  includes: function includes(searchString /* , position = 0 */) {\n    return !!~String(requireObjectCoercible(this))\n      .indexOf(notARegExp(searchString), arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar redefine = require('../internals/redefine');\nvar anObject = require('../internals/an-object');\nvar fails = require('../internals/fails');\nvar flags = require('../internals/regexp-flags');\n\nvar TO_STRING = 'toString';\nvar RegExpPrototype = RegExp.prototype;\nvar nativeToString = RegExpPrototype[TO_STRING];\n\nvar NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });\n// FF44- RegExp#toString has a wrong name\nvar INCORRECT_NAME = nativeToString.name != TO_STRING;\n\n// `RegExp.prototype.toString` method\n// https://tc39.es/ecma262/#sec-regexp.prototype.tostring\nif (NOT_GENERIC || INCORRECT_NAME) {\n  redefine(RegExp.prototype, TO_STRING, function toString() {\n    var R = anObject(this);\n    var p = String(R.source);\n    var rf = R.flags;\n    var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? flags.call(R) : rf);\n    return '/' + p + '/' + f;\n  }, { unsafe: true });\n}\n","'use strict';\nvar getBuiltIn = require('../internals/get-built-in');\nvar definePropertyModule = require('../internals/object-define-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar SPECIES = wellKnownSymbol('species');\n\nmodule.exports = function (CONSTRUCTOR_NAME) {\n  var Constructor = getBuiltIn(CONSTRUCTOR_NAME);\n  var defineProperty = definePropertyModule.f;\n\n  if (DESCRIPTORS && Constructor && !Constructor[SPECIES]) {\n    defineProperty(Constructor, SPECIES, {\n      configurable: true,\n      get: function () { return this; }\n    });\n  }\n};\n","/**\n * @file virtual-source-buffer.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _createTextTracksIfNecessary = require('./create-text-tracks-if-necessary');\n\nvar _createTextTracksIfNecessary2 = _interopRequireDefault(_createTextTracksIfNecessary);\n\nvar _removeCuesFromTrack = require('./remove-cues-from-track');\n\nvar _removeCuesFromTrack2 = _interopRequireDefault(_removeCuesFromTrack);\n\nvar _addTextTrackData = require('./add-text-track-data');\n\nvar _webwackify = require('webwackify');\n\nvar _webwackify2 = _interopRequireDefault(_webwackify);\n\nvar _transmuxerWorker = require('./transmuxer-worker');\n\nvar _transmuxerWorker2 = _interopRequireDefault(_transmuxerWorker);\n\nvar _codecUtils = require('./codec-utils');\n\nvar resolveTransmuxWorker = function resolveTransmuxWorker() {\n  var result = undefined;\n\n  try {\n    result = require.resolve('./transmuxer-worker');\n  } catch (e) {\n    // no result\n  }\n\n  return result;\n};\n\n// We create a wrapper around the SourceBuffer so that we can manage the\n// state of the `updating` property manually. We have to do this because\n// Firefox changes `updating` to false long before triggering `updateend`\n// events and that was causing strange problems in videojs-contrib-hls\nvar makeWrappedSourceBuffer = function makeWrappedSourceBuffer(mediaSource, mimeType) {\n  var sourceBuffer = mediaSource.addSourceBuffer(mimeType);\n  var wrapper = Object.create(null);\n\n  wrapper.updating = false;\n  wrapper.realBuffer_ = sourceBuffer;\n\n  var _loop = function (key) {\n    if (typeof sourceBuffer[key] === 'function') {\n      wrapper[key] = function () {\n        return sourceBuffer[key].apply(sourceBuffer, arguments);\n      };\n    } else if (typeof wrapper[key] === 'undefined') {\n      Object.defineProperty(wrapper, key, {\n        get: function get() {\n          return sourceBuffer[key];\n        },\n        set: function set(v) {\n          return sourceBuffer[key] = v;\n        }\n      });\n    }\n  };\n\n  for (var key in sourceBuffer) {\n    _loop(key);\n  }\n\n  return wrapper;\n};\n\n/**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Player} player\n *        The player instance\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n * @return {Array}\n *         List of gops considered safe to append over\n */\nvar gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, player, mapping) {\n  if (!player || !buffer.length) {\n    return [];\n  }\n\n  // pts value for current time + 3 seconds to give a bit more wiggle room\n  var currentTimePts = Math.ceil((player.currentTime() - mapping + 3) * 90000);\n\n  var i = undefined;\n\n  for (i = 0; i < buffer.length; i++) {\n    if (buffer[i].pts > currentTimePts) {\n      break;\n    }\n  }\n\n  return buffer.slice(i);\n};\n\nexports.gopsSafeToAlignWith = gopsSafeToAlignWith;\n/**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Array} gops\n *        List of new gop information\n * @param {boolean} replace\n *        If true, replace the buffer with the new gop information. If false, append the\n *        new gop information to the buffer in the right location of time.\n * @return {Array}\n *         Updated list of gop information\n */\nvar updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {\n  if (!gops.length) {\n    return buffer;\n  }\n\n  if (replace) {\n    // If we are in safe append mode, then completely overwrite the gop buffer\n    // with the most recent appeneded data. This will make sure that when appending\n    // future segments, we only try to align with gops that are both ahead of current\n    // time and in the last segment appended.\n    return gops.slice();\n  }\n\n  var start = gops[0].pts;\n\n  var i = 0;\n\n  for (i; i < buffer.length; i++) {\n    if (buffer[i].pts >= start) {\n      break;\n    }\n  }\n\n  return buffer.slice(0, i).concat(gops);\n};\n\nexports.updateGopBuffer = updateGopBuffer;\n/**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Double} start\n *        position to start the remove at\n * @param {Double} end\n *        position to end the remove at\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n */\nvar removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {\n  var startPts = Math.ceil((start - mapping) * 90000);\n  var endPts = Math.ceil((end - mapping) * 90000);\n  var updatedBuffer = buffer.slice();\n\n  var i = buffer.length;\n\n  while (i--) {\n    if (buffer[i].pts <= endPts) {\n      break;\n    }\n  }\n\n  if (i === -1) {\n    // no removal because end of remove range is before start of buffer\n    return updatedBuffer;\n  }\n\n  var j = i + 1;\n\n  while (j--) {\n    if (buffer[j].pts <= startPts) {\n      break;\n    }\n  }\n\n  // clamp remove range start to 0 index\n  j = Math.max(j, 0);\n\n  updatedBuffer.splice(j, i - j + 1);\n\n  return updatedBuffer;\n};\n\nexports.removeGopBuffer = removeGopBuffer;\n/**\n * VirtualSourceBuffers exist so that we can transmux non native formats\n * into a native format, but keep the same api as a native source buffer.\n * It creates a transmuxer, that works in its own thread (a web worker) and\n * that transmuxer muxes the data into a native format. VirtualSourceBuffer will\n * then send all of that data to the naive sourcebuffer so that it is\n * indestinguishable from a natively supported format.\n *\n * @param {HtmlMediaSource} mediaSource the parent mediaSource\n * @param {Array} codecs array of codecs that we will be dealing with\n * @class VirtualSourceBuffer\n * @extends video.js.EventTarget\n */\n\nvar VirtualSourceBuffer = (function (_videojs$EventTarget) {\n  _inherits(VirtualSourceBuffer, _videojs$EventTarget);\n\n  function VirtualSourceBuffer(mediaSource, codecs) {\n    var _this = this;\n\n    _classCallCheck(this, VirtualSourceBuffer);\n\n    _get(Object.getPrototypeOf(VirtualSourceBuffer.prototype), 'constructor', this).call(this, _videoJs2['default'].EventTarget);\n    this.timestampOffset_ = 0;\n    this.pendingBuffers_ = [];\n    this.bufferUpdating_ = false;\n\n    this.mediaSource_ = mediaSource;\n    this.codecs_ = codecs;\n    this.audioCodec_ = null;\n    this.videoCodec_ = null;\n    this.audioDisabled_ = false;\n    this.appendAudioInitSegment_ = true;\n    this.gopBuffer_ = [];\n    this.timeMapping_ = 0;\n    this.safeAppend_ = _videoJs2['default'].browser.IE_VERSION >= 11;\n\n    var options = {\n      remux: false,\n      alignGopsAtEnd: this.safeAppend_\n    };\n\n    this.codecs_.forEach(function (codec) {\n      if ((0, _codecUtils.isAudioCodec)(codec)) {\n        _this.audioCodec_ = codec;\n      } else if ((0, _codecUtils.isVideoCodec)(codec)) {\n        _this.videoCodec_ = codec;\n      }\n    });\n\n    // append muxed segments to their respective native buffers as\n    // soon as they are available\n    this.transmuxer_ = (0, _webwackify2['default'])(_transmuxerWorker2['default'], resolveTransmuxWorker());\n    this.transmuxer_.postMessage({ action: 'init', options: options });\n\n    this.transmuxer_.onmessage = function (event) {\n      if (event.data.action === 'data') {\n        return _this.data_(event);\n      }\n\n      if (event.data.action === 'done') {\n        return _this.done_(event);\n      }\n\n      if (event.data.action === 'gopInfo') {\n        return _this.appendGopInfo_(event);\n      }\n    };\n\n    // this timestampOffset is a property with the side-effect of resetting\n    // baseMediaDecodeTime in the transmuxer on the setter\n    Object.defineProperty(this, 'timestampOffset', {\n      get: function get() {\n        return this.timestampOffset_;\n      },\n      set: function set(val) {\n        if (typeof val === 'number' && val >= 0) {\n          this.timestampOffset_ = val;\n          this.appendAudioInitSegment_ = true;\n\n          // reset gop buffer on timestampoffset as this signals a change in timeline\n          this.gopBuffer_.length = 0;\n          this.timeMapping_ = 0;\n\n          // We have to tell the transmuxer to set the baseMediaDecodeTime to\n          // the desired timestampOffset for the next segment\n          this.transmuxer_.postMessage({\n            action: 'setTimestampOffset',\n            timestampOffset: val\n          });\n        }\n      }\n    });\n\n    // setting the append window affects both source buffers\n    Object.defineProperty(this, 'appendWindowStart', {\n      get: function get() {\n        return (this.videoBuffer_ || this.audioBuffer_).appendWindowStart;\n      },\n      set: function set(start) {\n        if (this.videoBuffer_) {\n          this.videoBuffer_.appendWindowStart = start;\n        }\n        if (this.audioBuffer_) {\n          this.audioBuffer_.appendWindowStart = start;\n        }\n      }\n    });\n\n    // this buffer is \"updating\" if either of its native buffers are\n    Object.defineProperty(this, 'updating', {\n      get: function get() {\n        return !!(this.bufferUpdating_ || !this.audioDisabled_ && this.audioBuffer_ && this.audioBuffer_.updating || this.videoBuffer_ && this.videoBuffer_.updating);\n      }\n    });\n\n    // the buffered property is the intersection of the buffered\n    // ranges of the native source buffers\n    Object.defineProperty(this, 'buffered', {\n      get: function get() {\n        var start = null;\n        var end = null;\n        var arity = 0;\n        var extents = [];\n        var ranges = [];\n\n        // neither buffer has been created yet\n        if (!this.videoBuffer_ && !this.audioBuffer_) {\n          return _videoJs2['default'].createTimeRange();\n        }\n\n        // only one buffer is configured\n        if (!this.videoBuffer_) {\n          return this.audioBuffer_.buffered;\n        }\n        if (!this.audioBuffer_) {\n          return this.videoBuffer_.buffered;\n        }\n\n        // both buffers are configured\n        if (this.audioDisabled_) {\n          return this.videoBuffer_.buffered;\n        }\n\n        // both buffers are empty\n        if (this.videoBuffer_.buffered.length === 0 && this.audioBuffer_.buffered.length === 0) {\n          return _videoJs2['default'].createTimeRange();\n        }\n\n        // Handle the case where we have both buffers and create an\n        // intersection of the two\n        var videoBuffered = this.videoBuffer_.buffered;\n        var audioBuffered = this.audioBuffer_.buffered;\n        var count = videoBuffered.length;\n\n        // A) Gather up all start and end times\n        while (count--) {\n          extents.push({ time: videoBuffered.start(count), type: 'start' });\n          extents.push({ time: videoBuffered.end(count), type: 'end' });\n        }\n        count = audioBuffered.length;\n        while (count--) {\n          extents.push({ time: audioBuffered.start(count), type: 'start' });\n          extents.push({ time: audioBuffered.end(count), type: 'end' });\n        }\n        // B) Sort them by time\n        extents.sort(function (a, b) {\n          return a.time - b.time;\n        });\n\n        // C) Go along one by one incrementing arity for start and decrementing\n        //    arity for ends\n        for (count = 0; count < extents.length; count++) {\n          if (extents[count].type === 'start') {\n            arity++;\n\n            // D) If arity is ever incremented to 2 we are entering an\n            //    overlapping range\n            if (arity === 2) {\n              start = extents[count].time;\n            }\n          } else if (extents[count].type === 'end') {\n            arity--;\n\n            // E) If arity is ever decremented to 1 we leaving an\n            //    overlapping range\n            if (arity === 1) {\n              end = extents[count].time;\n            }\n          }\n\n          // F) Record overlapping ranges\n          if (start !== null && end !== null) {\n            ranges.push([start, end]);\n            start = null;\n            end = null;\n          }\n        }\n\n        return _videoJs2['default'].createTimeRanges(ranges);\n      }\n    });\n  }\n\n  /**\n   * When we get a data event from the transmuxer\n   * we call this function and handle the data that\n   * was sent to us\n   *\n   * @private\n   * @param {Event} event the data event from the transmuxer\n   */\n\n  _createClass(VirtualSourceBuffer, [{\n    key: 'data_',\n    value: function data_(event) {\n      var segment = event.data.segment;\n\n      // Cast ArrayBuffer to TypedArray\n      segment.data = new Uint8Array(segment.data, event.data.byteOffset, event.data.byteLength);\n\n      segment.initSegment = new Uint8Array(segment.initSegment.data, segment.initSegment.byteOffset, segment.initSegment.byteLength);\n\n      (0, _createTextTracksIfNecessary2['default'])(this, this.mediaSource_, segment);\n\n      // Add the segments to the pendingBuffers array\n      this.pendingBuffers_.push(segment);\n      return;\n    }\n\n    /**\n     * When we get a done event from the transmuxer\n     * we call this function and we process all\n     * of the pending data that we have been saving in the\n     * data_ function\n     *\n     * @private\n     * @param {Event} event the done event from the transmuxer\n     */\n  }, {\n    key: 'done_',\n    value: function done_(event) {\n      // Don't process and append data if the mediaSource is closed\n      if (this.mediaSource_.readyState === 'closed') {\n        this.pendingBuffers_.length = 0;\n        return;\n      }\n\n      // All buffers should have been flushed from the muxer\n      // start processing anything we have received\n      this.processPendingSegments_();\n      return;\n    }\n\n    /**\n     * Create our internal native audio/video source buffers and add\n     * event handlers to them with the following conditions:\n     * 1. they do not already exist on the mediaSource\n     * 2. this VSB has a codec for them\n     *\n     * @private\n     */\n  }, {\n    key: 'createRealSourceBuffers_',\n    value: function createRealSourceBuffers_() {\n      var _this2 = this;\n\n      var types = ['audio', 'video'];\n\n      types.forEach(function (type) {\n        // Don't create a SourceBuffer of this type if we don't have a\n        // codec for it\n        if (!_this2[type + 'Codec_']) {\n          return;\n        }\n\n        // Do nothing if a SourceBuffer of this type already exists\n        if (_this2[type + 'Buffer_']) {\n          return;\n        }\n\n        var buffer = null;\n\n        // If the mediasource already has a SourceBuffer for the codec\n        // use that\n        if (_this2.mediaSource_[type + 'Buffer_']) {\n          buffer = _this2.mediaSource_[type + 'Buffer_'];\n          // In multiple audio track cases, the audio source buffer is disabled\n          // on the main VirtualSourceBuffer by the HTMLMediaSource much earlier\n          // than createRealSourceBuffers_ is called to create the second\n          // VirtualSourceBuffer because that happens as a side-effect of\n          // videojs-contrib-hls starting the audioSegmentLoader. As a result,\n          // the audioBuffer is essentially \"ownerless\" and no one will toggle\n          // the `updating` state back to false once the `updateend` event is received\n          //\n          // Setting `updating` to false manually will work around this\n          // situation and allow work to continue\n          buffer.updating = false;\n        } else {\n          var codecProperty = type + 'Codec_';\n          var mimeType = type + '/mp4;codecs=\"' + _this2[codecProperty] + '\"';\n\n          buffer = makeWrappedSourceBuffer(_this2.mediaSource_.nativeMediaSource_, mimeType);\n\n          _this2.mediaSource_[type + 'Buffer_'] = buffer;\n        }\n\n        _this2[type + 'Buffer_'] = buffer;\n\n        // Wire up the events to the SourceBuffer\n        ['update', 'updatestart', 'updateend'].forEach(function (event) {\n          buffer.addEventListener(event, function () {\n            // if audio is disabled\n            if (type === 'audio' && _this2.audioDisabled_) {\n              return;\n            }\n\n            if (event === 'updateend') {\n              _this2[type + 'Buffer_'].updating = false;\n            }\n\n            var shouldTrigger = types.every(function (t) {\n              // skip checking audio's updating status if audio\n              // is not enabled\n              if (t === 'audio' && _this2.audioDisabled_) {\n                return true;\n              }\n              // if the other type if updating we don't trigger\n              if (type !== t && _this2[t + 'Buffer_'] && _this2[t + 'Buffer_'].updating) {\n                return false;\n              }\n              return true;\n            });\n\n            if (shouldTrigger) {\n              return _this2.trigger(event);\n            }\n          });\n        });\n      });\n    }\n\n    /**\n     * Emulate the native mediasource function, but our function will\n     * send all of the proposed segments to the transmuxer so that we\n     * can transmux them before we append them to our internal\n     * native source buffers in the correct format.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/appendBuffer\n     * @param {Uint8Array} segment the segment to append to the buffer\n     */\n  }, {\n    key: 'appendBuffer',\n    value: function appendBuffer(segment) {\n      // Start the internal \"updating\" state\n      this.bufferUpdating_ = true;\n\n      if (this.audioBuffer_ && this.audioBuffer_.buffered.length) {\n        var audioBuffered = this.audioBuffer_.buffered;\n\n        this.transmuxer_.postMessage({\n          action: 'setAudioAppendStart',\n          appendStart: audioBuffered.end(audioBuffered.length - 1)\n        });\n      }\n\n      if (this.videoBuffer_) {\n        this.transmuxer_.postMessage({\n          action: 'alignGopsWith',\n          gopsToAlignWith: gopsSafeToAlignWith(this.gopBuffer_, this.mediaSource_.player_, this.timeMapping_)\n        });\n      }\n\n      this.transmuxer_.postMessage({\n        action: 'push',\n        // Send the typed-array of data as an ArrayBuffer so that\n        // it can be sent as a \"Transferable\" and avoid the costly\n        // memory copy\n        data: segment.buffer,\n\n        // To recreate the original typed-array, we need information\n        // about what portion of the ArrayBuffer it was a view into\n        byteOffset: segment.byteOffset,\n        byteLength: segment.byteLength\n      }, [segment.buffer]);\n      this.transmuxer_.postMessage({ action: 'flush' });\n    }\n\n    /**\n     * Appends gop information (timing and byteLength) received by the transmuxer for the\n     * gops appended in the last call to appendBuffer\n     *\n     * @param {Event} event\n     *        The gopInfo event from the transmuxer\n     * @param {Array} event.data.gopInfo\n     *        List of gop info to append\n     */\n  }, {\n    key: 'appendGopInfo_',\n    value: function appendGopInfo_(event) {\n      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, event.data.gopInfo, this.safeAppend_);\n    }\n\n    /**\n     * Emulate the native mediasource function and remove parts\n     * of the buffer from any of our internal buffers that exist\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/remove\n     * @param {Double} start position to start the remove at\n     * @param {Double} end position to end the remove at\n     */\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      if (this.videoBuffer_) {\n        this.videoBuffer_.updating = true;\n        this.videoBuffer_.remove(start, end);\n        this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n      }\n      if (!this.audioDisabled_ && this.audioBuffer_) {\n        this.audioBuffer_.updating = true;\n        this.audioBuffer_.remove(start, end);\n      }\n\n      // Remove Metadata Cues (id3)\n      (0, _removeCuesFromTrack2['default'])(start, end, this.metadataTrack_);\n\n      // Remove Any Captions\n      if (this.inbandTextTracks_) {\n        for (var track in this.inbandTextTracks_) {\n          (0, _removeCuesFromTrack2['default'])(start, end, this.inbandTextTracks_[track]);\n        }\n      }\n    }\n\n    /**\n     * Process any segments that the muxer has output\n     * Concatenate segments together based on type and append them into\n     * their respective sourceBuffers\n     *\n     * @private\n     */\n  }, {\n    key: 'processPendingSegments_',\n    value: function processPendingSegments_() {\n      var sortedSegments = {\n        video: {\n          segments: [],\n          bytes: 0\n        },\n        audio: {\n          segments: [],\n          bytes: 0\n        },\n        captions: [],\n        metadata: []\n      };\n\n      // Sort segments into separate video/audio arrays and\n      // keep track of their total byte lengths\n      sortedSegments = this.pendingBuffers_.reduce(function (segmentObj, segment) {\n        var type = segment.type;\n        var data = segment.data;\n        var initSegment = segment.initSegment;\n\n        segmentObj[type].segments.push(data);\n        segmentObj[type].bytes += data.byteLength;\n\n        segmentObj[type].initSegment = initSegment;\n\n        // Gather any captions into a single array\n        if (segment.captions) {\n          segmentObj.captions = segmentObj.captions.concat(segment.captions);\n        }\n\n        if (segment.info) {\n          segmentObj[type].info = segment.info;\n        }\n\n        // Gather any metadata into a single array\n        if (segment.metadata) {\n          segmentObj.metadata = segmentObj.metadata.concat(segment.metadata);\n        }\n\n        return segmentObj;\n      }, sortedSegments);\n\n      // Create the real source buffers if they don't exist by now since we\n      // finally are sure what tracks are contained in the source\n      if (!this.videoBuffer_ && !this.audioBuffer_) {\n        // Remove any codecs that may have been specified by default but\n        // are no longer applicable now\n        if (sortedSegments.video.bytes === 0) {\n          this.videoCodec_ = null;\n        }\n        if (sortedSegments.audio.bytes === 0) {\n          this.audioCodec_ = null;\n        }\n\n        this.createRealSourceBuffers_();\n      }\n\n      if (sortedSegments.audio.info) {\n        this.mediaSource_.trigger({ type: 'audioinfo', info: sortedSegments.audio.info });\n      }\n      if (sortedSegments.video.info) {\n        this.mediaSource_.trigger({ type: 'videoinfo', info: sortedSegments.video.info });\n      }\n\n      if (this.appendAudioInitSegment_) {\n        if (!this.audioDisabled_ && this.audioBuffer_) {\n          sortedSegments.audio.segments.unshift(sortedSegments.audio.initSegment);\n          sortedSegments.audio.bytes += sortedSegments.audio.initSegment.byteLength;\n        }\n        this.appendAudioInitSegment_ = false;\n      }\n\n      var triggerUpdateend = false;\n\n      // Merge multiple video and audio segments into one and append\n      if (this.videoBuffer_ && sortedSegments.video.bytes) {\n        sortedSegments.video.segments.unshift(sortedSegments.video.initSegment);\n        sortedSegments.video.bytes += sortedSegments.video.initSegment.byteLength;\n        this.concatAndAppendSegments_(sortedSegments.video, this.videoBuffer_);\n        // TODO: are video tracks the only ones with text tracks?\n        (0, _addTextTrackData.addTextTrackData)(this, sortedSegments.captions, sortedSegments.metadata);\n      } else if (this.videoBuffer_ && (this.audioDisabled_ || !this.audioBuffer_)) {\n        // The transmuxer did not return any bytes of video, meaning it was all trimmed\n        // for gop alignment. Since we have a video buffer and audio is disabled, updateend\n        // will never be triggered by this source buffer, which will cause contrib-hls\n        // to be stuck forever waiting for updateend. If audio is not disabled, updateend\n        // will be triggered by the audio buffer, which will be sent upwards since the video\n        // buffer will not be in an updating state.\n        triggerUpdateend = true;\n      }\n\n      if (!this.audioDisabled_ && this.audioBuffer_) {\n        this.concatAndAppendSegments_(sortedSegments.audio, this.audioBuffer_);\n      }\n\n      this.pendingBuffers_.length = 0;\n\n      if (triggerUpdateend) {\n        this.trigger('updateend');\n      }\n\n      // We are no longer in the internal \"updating\" state\n      this.bufferUpdating_ = false;\n    }\n\n    /**\n     * Combine all segments into a single Uint8Array and then append them\n     * to the destination buffer\n     *\n     * @param {Object} segmentObj\n     * @param {SourceBuffer} destinationBuffer native source buffer to append data to\n     * @private\n     */\n  }, {\n    key: 'concatAndAppendSegments_',\n    value: function concatAndAppendSegments_(segmentObj, destinationBuffer) {\n      var offset = 0;\n      var tempBuffer = undefined;\n\n      if (segmentObj.bytes) {\n        tempBuffer = new Uint8Array(segmentObj.bytes);\n\n        // Combine the individual segments into one large typed-array\n        segmentObj.segments.forEach(function (segment) {\n          tempBuffer.set(segment, offset);\n          offset += segment.byteLength;\n        });\n\n        try {\n          destinationBuffer.updating = true;\n          destinationBuffer.appendBuffer(tempBuffer);\n        } catch (error) {\n          if (this.mediaSource_.player_) {\n            this.mediaSource_.player_.error({\n              code: -3,\n              type: 'APPEND_BUFFER_ERR',\n              message: error.message,\n              originalError: error\n            });\n          }\n        }\n      }\n    }\n\n    /**\n     * Emulate the native mediasource function. abort any soureBuffer\n     * actions and throw out any un-appended data.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/abort\n     */\n  }, {\n    key: 'abort',\n    value: function abort() {\n      if (this.videoBuffer_) {\n        this.videoBuffer_.abort();\n      }\n      if (!this.audioDisabled_ && this.audioBuffer_) {\n        this.audioBuffer_.abort();\n      }\n      if (this.transmuxer_) {\n        this.transmuxer_.postMessage({ action: 'reset' });\n      }\n      this.pendingBuffers_.length = 0;\n      this.bufferUpdating_ = false;\n    }\n  }]);\n\n  return VirtualSourceBuffer;\n})(_videoJs2['default'].EventTarget);\n\nexports['default'] = VirtualSourceBuffer;","import getWindow from \"./getWindow.js\";\n\nfunction isElement(node) {\n  var OwnElement = getWindow(node).Element;\n  return node instanceof OwnElement || node instanceof Element;\n}\n\nfunction isHTMLElement(node) {\n  var OwnElement = getWindow(node).HTMLElement;\n  return node instanceof OwnElement || node instanceof HTMLElement;\n}\n\nfunction isShadowRoot(node) {\n  // IE 11 has no ShadowRoot\n  if (typeof ShadowRoot === 'undefined') {\n    return false;\n  }\n\n  var OwnElement = getWindow(node).ShadowRoot;\n  return node instanceof OwnElement || node instanceof ShadowRoot;\n}\n\nexport { isElement, isHTMLElement, isShadowRoot };","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// a transform stream is a readable/writable stream where you do\n// something with the data.  Sometimes it's called a \"filter\",\n// but that's not a great name for it, since that implies a thing where\n// some bits pass through, and others are simply ignored.  (That would\n// be a valid example of a transform, of course.)\n//\n// While the output is causally related to the input, it's not a\n// necessarily symmetric or synchronous transformation.  For example,\n// a zlib stream might take multiple plain-text writes(), and then\n// emit a single compressed chunk some time in the future.\n//\n// Here's how this works:\n//\n// The Transform stream has all the aspects of the readable and writable\n// stream classes.  When you write(chunk), that calls _write(chunk,cb)\n// internally, and returns false if there's a lot of pending writes\n// buffered up.  When you call read(), that calls _read(n) until\n// there's enough pending readable data buffered up.\n//\n// In a transform stream, the written data is placed in a buffer.  When\n// _read(n) is called, it transforms the queued up data, calling the\n// buffered _write cb's as it consumes chunks.  If consuming a single\n// written chunk would result in multiple output chunks, then the first\n// outputted bit calls the readcb, and subsequent chunks just go into\n// the read buffer, and will cause it to emit 'readable' if necessary.\n//\n// This way, back-pressure is actually determined by the reading side,\n// since _read has to be called to start processing a new chunk.  However,\n// a pathological inflate type of transform can cause excessive buffering\n// here.  For example, imagine a stream where every byte of input is\n// interpreted as an integer from 0-255, and then results in that many\n// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in\n// 1kb of data being output.  In this case, you could write a very small\n// amount of input, and end up with a very large amount of output.  In\n// such a pathological inflating mechanism, there'd be no way to tell\n// the system to stop doing the transform.  A single 4MB write could\n// cause the system to run out of memory.\n//\n// However, even in such a pathological case, only a single written chunk\n// would be consumed, and then the rest would wait (un-transformed) until\n// the results of the previous transformed chunk were consumed.\n\n'use strict';\n\nmodule.exports = Transform;\n\nvar Duplex = require('./_stream_duplex');\n\n/*<replacement>*/\nvar util = Object.create(require('core-util-is'));\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nutil.inherits(Transform, Duplex);\n\nfunction afterTransform(er, data) {\n  var ts = this._transformState;\n  ts.transforming = false;\n\n  var cb = ts.writecb;\n\n  if (!cb) {\n    return this.emit('error', new Error('write callback called multiple times'));\n  }\n\n  ts.writechunk = null;\n  ts.writecb = null;\n\n  if (data != null) // single equals check for both `null` and `undefined`\n    this.push(data);\n\n  cb(er);\n\n  var rs = this._readableState;\n  rs.reading = false;\n  if (rs.needReadable || rs.length < rs.highWaterMark) {\n    this._read(rs.highWaterMark);\n  }\n}\n\nfunction Transform(options) {\n  if (!(this instanceof Transform)) return new Transform(options);\n\n  Duplex.call(this, options);\n\n  this._transformState = {\n    afterTransform: afterTransform.bind(this),\n    needTransform: false,\n    transforming: false,\n    writecb: null,\n    writechunk: null,\n    writeencoding: null\n  };\n\n  // start out asking for a readable event once data is transformed.\n  this._readableState.needReadable = true;\n\n  // we have implemented the _read method, and done the other things\n  // that Readable wants before the first _read call, so unset the\n  // sync guard flag.\n  this._readableState.sync = false;\n\n  if (options) {\n    if (typeof options.transform === 'function') this._transform = options.transform;\n\n    if (typeof options.flush === 'function') this._flush = options.flush;\n  }\n\n  // When the writable side finishes, then flush out anything remaining.\n  this.on('prefinish', prefinish);\n}\n\nfunction prefinish() {\n  var _this = this;\n\n  if (typeof this._flush === 'function') {\n    this._flush(function (er, data) {\n      done(_this, er, data);\n    });\n  } else {\n    done(this, null, null);\n  }\n}\n\nTransform.prototype.push = function (chunk, encoding) {\n  this._transformState.needTransform = false;\n  return Duplex.prototype.push.call(this, chunk, encoding);\n};\n\n// This is the part where you do stuff!\n// override this function in implementation classes.\n// 'chunk' is an input chunk.\n//\n// Call `push(newChunk)` to pass along transformed output\n// to the readable side.  You may call 'push' zero or more times.\n//\n// Call `cb(err)` when you are done with this chunk.  If you pass\n// an error, then that'll put the hurt on the whole operation.  If you\n// never call cb(), then you'll never get another chunk.\nTransform.prototype._transform = function (chunk, encoding, cb) {\n  throw new Error('_transform() is not implemented');\n};\n\nTransform.prototype._write = function (chunk, encoding, cb) {\n  var ts = this._transformState;\n  ts.writecb = cb;\n  ts.writechunk = chunk;\n  ts.writeencoding = encoding;\n  if (!ts.transforming) {\n    var rs = this._readableState;\n    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);\n  }\n};\n\n// Doesn't matter what the args are here.\n// _transform does all the work.\n// That we got here means that the readable side wants more data.\nTransform.prototype._read = function (n) {\n  var ts = this._transformState;\n\n  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {\n    ts.transforming = true;\n    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);\n  } else {\n    // mark that we need a transform, so that any data that comes in\n    // will get processed, now that we've asked for it.\n    ts.needTransform = true;\n  }\n};\n\nTransform.prototype._destroy = function (err, cb) {\n  var _this2 = this;\n\n  Duplex.prototype._destroy.call(this, err, function (err2) {\n    cb(err2);\n    _this2.emit('close');\n  });\n};\n\nfunction done(stream, er, data) {\n  if (er) return stream.emit('error', er);\n\n  if (data != null) // single equals check for both `null` and `undefined`\n    stream.push(data);\n\n  // if there's nothing in the write buffer, then that means\n  // that nothing more will ever be provided\n  if (stream._writableState.length) throw new Error('Calling transform done when ws.length != 0');\n\n  if (stream._transformState.transforming) throw new Error('Calling transform done when still transforming');\n\n  return stream.push(null);\n}","import getNodeName from \"./getNodeName.js\";\nimport getDocumentElement from \"./getDocumentElement.js\";\nimport { isShadowRoot } from \"./instanceOf.js\";\nexport default function getParentNode(element) {\n  if (getNodeName(element) === 'html') {\n    return element;\n  }\n\n  return (// this is a quicker (but less type safe) way to save quite some bytes from the bundle\n    // $FlowFixMe[incompatible-return]\n    // $FlowFixMe[prop-missing]\n    element.assignedSlot || // step into the shadow DOM of the parent of a slotted node\n    element.parentNode || ( // DOM Element detected\n    isShadowRoot(element) ? element.host : null) || // ShadowRoot detected\n    // $FlowFixMe[incompatible-call]: HTMLElement is a Node\n    getDocumentElement(element) // fallback\n\n  );\n}","import arrayLikeToArray from \"./arrayLikeToArray.js\";\nexport default function _arrayWithoutHoles(arr) {\n  if (Array.isArray(arr)) return arrayLikeToArray(arr);\n}","export default function _iterableToArray(iter) {\n  if (typeof Symbol !== \"undefined\" && Symbol.iterator in Object(iter)) return Array.from(iter);\n}","export default function _nonIterableSpread() {\n  throw new TypeError(\"Invalid attempt to spread non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","import arrayWithoutHoles from \"./arrayWithoutHoles.js\";\nimport iterableToArray from \"./iterableToArray.js\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray.js\";\nimport nonIterableSpread from \"./nonIterableSpread.js\";\nexport default function _toConsumableArray(arr) {\n  return arrayWithoutHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableSpread();\n}","var anObject = require('../internals/an-object');\n\nmodule.exports = function (iterator) {\n  var returnMethod = iterator['return'];\n  if (returnMethod !== undefined) {\n    return anObject(returnMethod.call(iterator)).value;\n  }\n};\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * Zero padding strategy.\n\t */\n\tCryptoJS.pad.ZeroPadding = {\n\t    pad: function (data, blockSize) {\n\t        // Shortcut\n\t        var blockSizeBytes = blockSize * 4;\n\n\t        // Pad\n\t        data.clamp();\n\t        data.sigBytes += blockSizeBytes - ((data.sigBytes % blockSizeBytes) || blockSizeBytes);\n\t    },\n\n\t    unpad: function (data) {\n\t        // Shortcut\n\t        var dataWords = data.words;\n\n\t        // Unpad\n\t        var i = data.sigBytes - 1;\n\t        for (var i = data.sigBytes - 1; i >= 0; i--) {\n\t            if (((dataWords[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff)) {\n\t                data.sigBytes = i + 1;\n\t                break;\n\t            }\n\t        }\n\t    }\n\t};\n\n\n\treturn CryptoJS.pad.ZeroPadding;\n\n}));","var asn1 = require('./asn1')\nvar aesid = require('./aesid.json')\nvar fixProc = require('./fixProc')\nvar ciphers = require('browserify-aes')\nvar compat = require('pbkdf2')\nvar Buffer = require('safe-buffer').Buffer\nmodule.exports = parseKeys\n\nfunction parseKeys (buffer) {\n  var password\n  if (typeof buffer === 'object' && !Buffer.isBuffer(buffer)) {\n    password = buffer.passphrase\n    buffer = buffer.key\n  }\n  if (typeof buffer === 'string') {\n    buffer = Buffer.from(buffer)\n  }\n\n  var stripped = fixProc(buffer, password)\n\n  var type = stripped.tag\n  var data = stripped.data\n  var subtype, ndata\n  switch (type) {\n    case 'CERTIFICATE':\n      ndata = asn1.certificate.decode(data, 'der').tbsCertificate.subjectPublicKeyInfo\n      // falls through\n    case 'PUBLIC KEY':\n      if (!ndata) {\n        ndata = asn1.PublicKey.decode(data, 'der')\n      }\n      subtype = ndata.algorithm.algorithm.join('.')\n      switch (subtype) {\n        case '1.2.840.113549.1.1.1':\n          return asn1.RSAPublicKey.decode(ndata.subjectPublicKey.data, 'der')\n        case '1.2.840.10045.2.1':\n          ndata.subjectPrivateKey = ndata.subjectPublicKey\n          return {\n            type: 'ec',\n            data: ndata\n          }\n        case '1.2.840.10040.4.1':\n          ndata.algorithm.params.pub_key = asn1.DSAparam.decode(ndata.subjectPublicKey.data, 'der')\n          return {\n            type: 'dsa',\n            data: ndata.algorithm.params\n          }\n        default: throw new Error('unknown key id ' + subtype)\n      }\n      // throw new Error('unknown key type ' + type)\n    case 'ENCRYPTED PRIVATE KEY':\n      data = asn1.EncryptedPrivateKey.decode(data, 'der')\n      data = decrypt(data, password)\n      // falls through\n    case 'PRIVATE KEY':\n      ndata = asn1.PrivateKey.decode(data, 'der')\n      subtype = ndata.algorithm.algorithm.join('.')\n      switch (subtype) {\n        case '1.2.840.113549.1.1.1':\n          return asn1.RSAPrivateKey.decode(ndata.subjectPrivateKey, 'der')\n        case '1.2.840.10045.2.1':\n          return {\n            curve: ndata.algorithm.curve,\n            privateKey: asn1.ECPrivateKey.decode(ndata.subjectPrivateKey, 'der').privateKey\n          }\n        case '1.2.840.10040.4.1':\n          ndata.algorithm.params.priv_key = asn1.DSAparam.decode(ndata.subjectPrivateKey, 'der')\n          return {\n            type: 'dsa',\n            params: ndata.algorithm.params\n          }\n        default: throw new Error('unknown key id ' + subtype)\n      }\n      // throw new Error('unknown key type ' + type)\n    case 'RSA PUBLIC KEY':\n      return asn1.RSAPublicKey.decode(data, 'der')\n    case 'RSA PRIVATE KEY':\n      return asn1.RSAPrivateKey.decode(data, 'der')\n    case 'DSA PRIVATE KEY':\n      return {\n        type: 'dsa',\n        params: asn1.DSAPrivateKey.decode(data, 'der')\n      }\n    case 'EC PRIVATE KEY':\n      data = asn1.ECPrivateKey.decode(data, 'der')\n      return {\n        curve: data.parameters.value,\n        privateKey: data.privateKey\n      }\n    default: throw new Error('unknown key type ' + type)\n  }\n}\nparseKeys.signature = asn1.signature\nfunction decrypt (data, password) {\n  var salt = data.algorithm.decrypt.kde.kdeparams.salt\n  var iters = parseInt(data.algorithm.decrypt.kde.kdeparams.iters.toString(), 10)\n  var algo = aesid[data.algorithm.decrypt.cipher.algo.join('.')]\n  var iv = data.algorithm.decrypt.cipher.iv\n  var cipherText = data.subjectPrivateKey\n  var keylen = parseInt(algo.split('-')[1], 10) / 8\n  var key = compat.pbkdf2Sync(password, salt, iters, keylen, 'sha1')\n  var cipher = ciphers.createDecipheriv(algo, key, iv)\n  var out = []\n  out.push(cipher.update(cipherText))\n  out.push(cipher.final())\n  return Buffer.concat(out)\n}\n","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.string.iterator');\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar global = require('../internals/global');\nvar defineProperties = require('../internals/object-define-properties');\nvar redefine = require('../internals/redefine');\nvar anInstance = require('../internals/an-instance');\nvar has = require('../internals/has');\nvar assign = require('../internals/object-assign');\nvar arrayFrom = require('../internals/array-from');\nvar codeAt = require('../internals/string-multibyte').codeAt;\nvar toASCII = require('../internals/string-punycode-to-ascii');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar URLSearchParamsModule = require('../modules/web.url-search-params');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar NativeURL = global.URL;\nvar URLSearchParams = URLSearchParamsModule.URLSearchParams;\nvar getInternalSearchParamsState = URLSearchParamsModule.getState;\nvar setInternalState = InternalStateModule.set;\nvar getInternalURLState = InternalStateModule.getterFor('URL');\nvar floor = Math.floor;\nvar pow = Math.pow;\n\nvar INVALID_AUTHORITY = 'Invalid authority';\nvar INVALID_SCHEME = 'Invalid scheme';\nvar INVALID_HOST = 'Invalid host';\nvar INVALID_PORT = 'Invalid port';\n\nvar ALPHA = /[A-Za-z]/;\nvar ALPHANUMERIC = /[\\d+-.A-Za-z]/;\nvar DIGIT = /\\d/;\nvar HEX_START = /^(0x|0X)/;\nvar OCT = /^[0-7]+$/;\nvar DEC = /^\\d+$/;\nvar HEX = /^[\\dA-Fa-f]+$/;\n/* eslint-disable no-control-regex -- safe */\nvar FORBIDDEN_HOST_CODE_POINT = /[\\u0000\\t\\u000A\\u000D #%/:?@[\\\\]]/;\nvar FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\\u0000\\t\\u000A\\u000D #/:?@[\\\\]]/;\nvar LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\\u0000-\\u001F ]+|[\\u0000-\\u001F ]+$/g;\nvar TAB_AND_NEW_LINE = /[\\t\\u000A\\u000D]/g;\n/* eslint-enable no-control-regex -- safe */\nvar EOF;\n\nvar parseHost = function (url, input) {\n  var result, codePoints, index;\n  if (input.charAt(0) == '[') {\n    if (input.charAt(input.length - 1) != ']') return INVALID_HOST;\n    result = parseIPv6(input.slice(1, -1));\n    if (!result) return INVALID_HOST;\n    url.host = result;\n  // opaque host\n  } else if (!isSpecial(url)) {\n    if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;\n    result = '';\n    codePoints = arrayFrom(input);\n    for (index = 0; index < codePoints.length; index++) {\n      result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);\n    }\n    url.host = result;\n  } else {\n    input = toASCII(input);\n    if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;\n    result = parseIPv4(input);\n    if (result === null) return INVALID_HOST;\n    url.host = result;\n  }\n};\n\nvar parseIPv4 = function (input) {\n  var parts = input.split('.');\n  var partsLength, numbers, index, part, radix, number, ipv4;\n  if (parts.length && parts[parts.length - 1] == '') {\n    parts.pop();\n  }\n  partsLength = parts.length;\n  if (partsLength > 4) return input;\n  numbers = [];\n  for (index = 0; index < partsLength; index++) {\n    part = parts[index];\n    if (part == '') return input;\n    radix = 10;\n    if (part.length > 1 && part.charAt(0) == '0') {\n      radix = HEX_START.test(part) ? 16 : 8;\n      part = part.slice(radix == 8 ? 1 : 2);\n    }\n    if (part === '') {\n      number = 0;\n    } else {\n      if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;\n      number = parseInt(part, radix);\n    }\n    numbers.push(number);\n  }\n  for (index = 0; index < partsLength; index++) {\n    number = numbers[index];\n    if (index == partsLength - 1) {\n      if (number >= pow(256, 5 - partsLength)) return null;\n    } else if (number > 255) return null;\n  }\n  ipv4 = numbers.pop();\n  for (index = 0; index < numbers.length; index++) {\n    ipv4 += numbers[index] * pow(256, 3 - index);\n  }\n  return ipv4;\n};\n\n// eslint-disable-next-line max-statements -- TODO\nvar parseIPv6 = function (input) {\n  var address = [0, 0, 0, 0, 0, 0, 0, 0];\n  var pieceIndex = 0;\n  var compress = null;\n  var pointer = 0;\n  var value, length, numbersSeen, ipv4Piece, number, swaps, swap;\n\n  var char = function () {\n    return input.charAt(pointer);\n  };\n\n  if (char() == ':') {\n    if (input.charAt(1) != ':') return;\n    pointer += 2;\n    pieceIndex++;\n    compress = pieceIndex;\n  }\n  while (char()) {\n    if (pieceIndex == 8) return;\n    if (char() == ':') {\n      if (compress !== null) return;\n      pointer++;\n      pieceIndex++;\n      compress = pieceIndex;\n      continue;\n    }\n    value = length = 0;\n    while (length < 4 && HEX.test(char())) {\n      value = value * 16 + parseInt(char(), 16);\n      pointer++;\n      length++;\n    }\n    if (char() == '.') {\n      if (length == 0) return;\n      pointer -= length;\n      if (pieceIndex > 6) return;\n      numbersSeen = 0;\n      while (char()) {\n        ipv4Piece = null;\n        if (numbersSeen > 0) {\n          if (char() == '.' && numbersSeen < 4) pointer++;\n          else return;\n        }\n        if (!DIGIT.test(char())) return;\n        while (DIGIT.test(char())) {\n          number = parseInt(char(), 10);\n          if (ipv4Piece === null) ipv4Piece = number;\n          else if (ipv4Piece == 0) return;\n          else ipv4Piece = ipv4Piece * 10 + number;\n          if (ipv4Piece > 255) return;\n          pointer++;\n        }\n        address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;\n        numbersSeen++;\n        if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;\n      }\n      if (numbersSeen != 4) return;\n      break;\n    } else if (char() == ':') {\n      pointer++;\n      if (!char()) return;\n    } else if (char()) return;\n    address[pieceIndex++] = value;\n  }\n  if (compress !== null) {\n    swaps = pieceIndex - compress;\n    pieceIndex = 7;\n    while (pieceIndex != 0 && swaps > 0) {\n      swap = address[pieceIndex];\n      address[pieceIndex--] = address[compress + swaps - 1];\n      address[compress + --swaps] = swap;\n    }\n  } else if (pieceIndex != 8) return;\n  return address;\n};\n\nvar findLongestZeroSequence = function (ipv6) {\n  var maxIndex = null;\n  var maxLength = 1;\n  var currStart = null;\n  var currLength = 0;\n  var index = 0;\n  for (; index < 8; index++) {\n    if (ipv6[index] !== 0) {\n      if (currLength > maxLength) {\n        maxIndex = currStart;\n        maxLength = currLength;\n      }\n      currStart = null;\n      currLength = 0;\n    } else {\n      if (currStart === null) currStart = index;\n      ++currLength;\n    }\n  }\n  if (currLength > maxLength) {\n    maxIndex = currStart;\n    maxLength = currLength;\n  }\n  return maxIndex;\n};\n\nvar serializeHost = function (host) {\n  var result, index, compress, ignore0;\n  // ipv4\n  if (typeof host == 'number') {\n    result = [];\n    for (index = 0; index < 4; index++) {\n      result.unshift(host % 256);\n      host = floor(host / 256);\n    } return result.join('.');\n  // ipv6\n  } else if (typeof host == 'object') {\n    result = '';\n    compress = findLongestZeroSequence(host);\n    for (index = 0; index < 8; index++) {\n      if (ignore0 && host[index] === 0) continue;\n      if (ignore0) ignore0 = false;\n      if (compress === index) {\n        result += index ? ':' : '::';\n        ignore0 = true;\n      } else {\n        result += host[index].toString(16);\n        if (index < 7) result += ':';\n      }\n    }\n    return '[' + result + ']';\n  } return host;\n};\n\nvar C0ControlPercentEncodeSet = {};\nvar fragmentPercentEncodeSet = assign({}, C0ControlPercentEncodeSet, {\n  ' ': 1, '\"': 1, '<': 1, '>': 1, '`': 1\n});\nvar pathPercentEncodeSet = assign({}, fragmentPercentEncodeSet, {\n  '#': 1, '?': 1, '{': 1, '}': 1\n});\nvar userinfoPercentEncodeSet = assign({}, pathPercentEncodeSet, {\n  '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\\\': 1, ']': 1, '^': 1, '|': 1\n});\n\nvar percentEncode = function (char, set) {\n  var code = codeAt(char, 0);\n  return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);\n};\n\nvar specialSchemes = {\n  ftp: 21,\n  file: null,\n  http: 80,\n  https: 443,\n  ws: 80,\n  wss: 443\n};\n\nvar isSpecial = function (url) {\n  return has(specialSchemes, url.scheme);\n};\n\nvar includesCredentials = function (url) {\n  return url.username != '' || url.password != '';\n};\n\nvar cannotHaveUsernamePasswordPort = function (url) {\n  return !url.host || url.cannotBeABaseURL || url.scheme == 'file';\n};\n\nvar isWindowsDriveLetter = function (string, normalized) {\n  var second;\n  return string.length == 2 && ALPHA.test(string.charAt(0))\n    && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));\n};\n\nvar startsWithWindowsDriveLetter = function (string) {\n  var third;\n  return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (\n    string.length == 2 ||\n    ((third = string.charAt(2)) === '/' || third === '\\\\' || third === '?' || third === '#')\n  );\n};\n\nvar shortenURLsPath = function (url) {\n  var path = url.path;\n  var pathSize = path.length;\n  if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {\n    path.pop();\n  }\n};\n\nvar isSingleDot = function (segment) {\n  return segment === '.' || segment.toLowerCase() === '%2e';\n};\n\nvar isDoubleDot = function (segment) {\n  segment = segment.toLowerCase();\n  return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';\n};\n\n// States:\nvar SCHEME_START = {};\nvar SCHEME = {};\nvar NO_SCHEME = {};\nvar SPECIAL_RELATIVE_OR_AUTHORITY = {};\nvar PATH_OR_AUTHORITY = {};\nvar RELATIVE = {};\nvar RELATIVE_SLASH = {};\nvar SPECIAL_AUTHORITY_SLASHES = {};\nvar SPECIAL_AUTHORITY_IGNORE_SLASHES = {};\nvar AUTHORITY = {};\nvar HOST = {};\nvar HOSTNAME = {};\nvar PORT = {};\nvar FILE = {};\nvar FILE_SLASH = {};\nvar FILE_HOST = {};\nvar PATH_START = {};\nvar PATH = {};\nvar CANNOT_BE_A_BASE_URL_PATH = {};\nvar QUERY = {};\nvar FRAGMENT = {};\n\n// eslint-disable-next-line max-statements -- TODO\nvar parseURL = function (url, input, stateOverride, base) {\n  var state = stateOverride || SCHEME_START;\n  var pointer = 0;\n  var buffer = '';\n  var seenAt = false;\n  var seenBracket = false;\n  var seenPasswordToken = false;\n  var codePoints, char, bufferCodePoints, failure;\n\n  if (!stateOverride) {\n    url.scheme = '';\n    url.username = '';\n    url.password = '';\n    url.host = null;\n    url.port = null;\n    url.path = [];\n    url.query = null;\n    url.fragment = null;\n    url.cannotBeABaseURL = false;\n    input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');\n  }\n\n  input = input.replace(TAB_AND_NEW_LINE, '');\n\n  codePoints = arrayFrom(input);\n\n  while (pointer <= codePoints.length) {\n    char = codePoints[pointer];\n    switch (state) {\n      case SCHEME_START:\n        if (char && ALPHA.test(char)) {\n          buffer += char.toLowerCase();\n          state = SCHEME;\n        } else if (!stateOverride) {\n          state = NO_SCHEME;\n          continue;\n        } else return INVALID_SCHEME;\n        break;\n\n      case SCHEME:\n        if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {\n          buffer += char.toLowerCase();\n        } else if (char == ':') {\n          if (stateOverride && (\n            (isSpecial(url) != has(specialSchemes, buffer)) ||\n            (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||\n            (url.scheme == 'file' && !url.host)\n          )) return;\n          url.scheme = buffer;\n          if (stateOverride) {\n            if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;\n            return;\n          }\n          buffer = '';\n          if (url.scheme == 'file') {\n            state = FILE;\n          } else if (isSpecial(url) && base && base.scheme == url.scheme) {\n            state = SPECIAL_RELATIVE_OR_AUTHORITY;\n          } else if (isSpecial(url)) {\n            state = SPECIAL_AUTHORITY_SLASHES;\n          } else if (codePoints[pointer + 1] == '/') {\n            state = PATH_OR_AUTHORITY;\n            pointer++;\n          } else {\n            url.cannotBeABaseURL = true;\n            url.path.push('');\n            state = CANNOT_BE_A_BASE_URL_PATH;\n          }\n        } else if (!stateOverride) {\n          buffer = '';\n          state = NO_SCHEME;\n          pointer = 0;\n          continue;\n        } else return INVALID_SCHEME;\n        break;\n\n      case NO_SCHEME:\n        if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;\n        if (base.cannotBeABaseURL && char == '#') {\n          url.scheme = base.scheme;\n          url.path = base.path.slice();\n          url.query = base.query;\n          url.fragment = '';\n          url.cannotBeABaseURL = true;\n          state = FRAGMENT;\n          break;\n        }\n        state = base.scheme == 'file' ? FILE : RELATIVE;\n        continue;\n\n      case SPECIAL_RELATIVE_OR_AUTHORITY:\n        if (char == '/' && codePoints[pointer + 1] == '/') {\n          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n          pointer++;\n        } else {\n          state = RELATIVE;\n          continue;\n        } break;\n\n      case PATH_OR_AUTHORITY:\n        if (char == '/') {\n          state = AUTHORITY;\n          break;\n        } else {\n          state = PATH;\n          continue;\n        }\n\n      case RELATIVE:\n        url.scheme = base.scheme;\n        if (char == EOF) {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = base.query;\n        } else if (char == '/' || (char == '\\\\' && isSpecial(url))) {\n          state = RELATIVE_SLASH;\n        } else if (char == '?') {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = '';\n          state = QUERY;\n        } else if (char == '#') {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.query = base.query;\n          url.fragment = '';\n          state = FRAGMENT;\n        } else {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          url.path = base.path.slice();\n          url.path.pop();\n          state = PATH;\n          continue;\n        } break;\n\n      case RELATIVE_SLASH:\n        if (isSpecial(url) && (char == '/' || char == '\\\\')) {\n          state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n        } else if (char == '/') {\n          state = AUTHORITY;\n        } else {\n          url.username = base.username;\n          url.password = base.password;\n          url.host = base.host;\n          url.port = base.port;\n          state = PATH;\n          continue;\n        } break;\n\n      case SPECIAL_AUTHORITY_SLASHES:\n        state = SPECIAL_AUTHORITY_IGNORE_SLASHES;\n        if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;\n        pointer++;\n        break;\n\n      case SPECIAL_AUTHORITY_IGNORE_SLASHES:\n        if (char != '/' && char != '\\\\') {\n          state = AUTHORITY;\n          continue;\n        } break;\n\n      case AUTHORITY:\n        if (char == '@') {\n          if (seenAt) buffer = '%40' + buffer;\n          seenAt = true;\n          bufferCodePoints = arrayFrom(buffer);\n          for (var i = 0; i < bufferCodePoints.length; i++) {\n            var codePoint = bufferCodePoints[i];\n            if (codePoint == ':' && !seenPasswordToken) {\n              seenPasswordToken = true;\n              continue;\n            }\n            var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);\n            if (seenPasswordToken) url.password += encodedCodePoints;\n            else url.username += encodedCodePoints;\n          }\n          buffer = '';\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url))\n        ) {\n          if (seenAt && buffer == '') return INVALID_AUTHORITY;\n          pointer -= arrayFrom(buffer).length + 1;\n          buffer = '';\n          state = HOST;\n        } else buffer += char;\n        break;\n\n      case HOST:\n      case HOSTNAME:\n        if (stateOverride && url.scheme == 'file') {\n          state = FILE_HOST;\n          continue;\n        } else if (char == ':' && !seenBracket) {\n          if (buffer == '') return INVALID_HOST;\n          failure = parseHost(url, buffer);\n          if (failure) return failure;\n          buffer = '';\n          state = PORT;\n          if (stateOverride == HOSTNAME) return;\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url))\n        ) {\n          if (isSpecial(url) && buffer == '') return INVALID_HOST;\n          if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;\n          failure = parseHost(url, buffer);\n          if (failure) return failure;\n          buffer = '';\n          state = PATH_START;\n          if (stateOverride) return;\n          continue;\n        } else {\n          if (char == '[') seenBracket = true;\n          else if (char == ']') seenBracket = false;\n          buffer += char;\n        } break;\n\n      case PORT:\n        if (DIGIT.test(char)) {\n          buffer += char;\n        } else if (\n          char == EOF || char == '/' || char == '?' || char == '#' ||\n          (char == '\\\\' && isSpecial(url)) ||\n          stateOverride\n        ) {\n          if (buffer != '') {\n            var port = parseInt(buffer, 10);\n            if (port > 0xFFFF) return INVALID_PORT;\n            url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;\n            buffer = '';\n          }\n          if (stateOverride) return;\n          state = PATH_START;\n          continue;\n        } else return INVALID_PORT;\n        break;\n\n      case FILE:\n        url.scheme = 'file';\n        if (char == '/' || char == '\\\\') state = FILE_SLASH;\n        else if (base && base.scheme == 'file') {\n          if (char == EOF) {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = base.query;\n          } else if (char == '?') {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = '';\n            state = QUERY;\n          } else if (char == '#') {\n            url.host = base.host;\n            url.path = base.path.slice();\n            url.query = base.query;\n            url.fragment = '';\n            state = FRAGMENT;\n          } else {\n            if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n              url.host = base.host;\n              url.path = base.path.slice();\n              shortenURLsPath(url);\n            }\n            state = PATH;\n            continue;\n          }\n        } else {\n          state = PATH;\n          continue;\n        } break;\n\n      case FILE_SLASH:\n        if (char == '/' || char == '\\\\') {\n          state = FILE_HOST;\n          break;\n        }\n        if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {\n          if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);\n          else url.host = base.host;\n        }\n        state = PATH;\n        continue;\n\n      case FILE_HOST:\n        if (char == EOF || char == '/' || char == '\\\\' || char == '?' || char == '#') {\n          if (!stateOverride && isWindowsDriveLetter(buffer)) {\n            state = PATH;\n          } else if (buffer == '') {\n            url.host = '';\n            if (stateOverride) return;\n            state = PATH_START;\n          } else {\n            failure = parseHost(url, buffer);\n            if (failure) return failure;\n            if (url.host == 'localhost') url.host = '';\n            if (stateOverride) return;\n            buffer = '';\n            state = PATH_START;\n          } continue;\n        } else buffer += char;\n        break;\n\n      case PATH_START:\n        if (isSpecial(url)) {\n          state = PATH;\n          if (char != '/' && char != '\\\\') continue;\n        } else if (!stateOverride && char == '?') {\n          url.query = '';\n          state = QUERY;\n        } else if (!stateOverride && char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          state = PATH;\n          if (char != '/') continue;\n        } break;\n\n      case PATH:\n        if (\n          char == EOF || char == '/' ||\n          (char == '\\\\' && isSpecial(url)) ||\n          (!stateOverride && (char == '?' || char == '#'))\n        ) {\n          if (isDoubleDot(buffer)) {\n            shortenURLsPath(url);\n            if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n              url.path.push('');\n            }\n          } else if (isSingleDot(buffer)) {\n            if (char != '/' && !(char == '\\\\' && isSpecial(url))) {\n              url.path.push('');\n            }\n          } else {\n            if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {\n              if (url.host) url.host = '';\n              buffer = buffer.charAt(0) + ':'; // normalize windows drive letter\n            }\n            url.path.push(buffer);\n          }\n          buffer = '';\n          if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {\n            while (url.path.length > 1 && url.path[0] === '') {\n              url.path.shift();\n            }\n          }\n          if (char == '?') {\n            url.query = '';\n            state = QUERY;\n          } else if (char == '#') {\n            url.fragment = '';\n            state = FRAGMENT;\n          }\n        } else {\n          buffer += percentEncode(char, pathPercentEncodeSet);\n        } break;\n\n      case CANNOT_BE_A_BASE_URL_PATH:\n        if (char == '?') {\n          url.query = '';\n          state = QUERY;\n        } else if (char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);\n        } break;\n\n      case QUERY:\n        if (!stateOverride && char == '#') {\n          url.fragment = '';\n          state = FRAGMENT;\n        } else if (char != EOF) {\n          if (char == \"'\" && isSpecial(url)) url.query += '%27';\n          else if (char == '#') url.query += '%23';\n          else url.query += percentEncode(char, C0ControlPercentEncodeSet);\n        } break;\n\n      case FRAGMENT:\n        if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);\n        break;\n    }\n\n    pointer++;\n  }\n};\n\n// `URL` constructor\n// https://url.spec.whatwg.org/#url-class\nvar URLConstructor = function URL(url /* , base */) {\n  var that = anInstance(this, URLConstructor, 'URL');\n  var base = arguments.length > 1 ? arguments[1] : undefined;\n  var urlString = String(url);\n  var state = setInternalState(that, { type: 'URL' });\n  var baseState, failure;\n  if (base !== undefined) {\n    if (base instanceof URLConstructor) baseState = getInternalURLState(base);\n    else {\n      failure = parseURL(baseState = {}, String(base));\n      if (failure) throw TypeError(failure);\n    }\n  }\n  failure = parseURL(state, urlString, null, baseState);\n  if (failure) throw TypeError(failure);\n  var searchParams = state.searchParams = new URLSearchParams();\n  var searchParamsState = getInternalSearchParamsState(searchParams);\n  searchParamsState.updateSearchParams(state.query);\n  searchParamsState.updateURL = function () {\n    state.query = String(searchParams) || null;\n  };\n  if (!DESCRIPTORS) {\n    that.href = serializeURL.call(that);\n    that.origin = getOrigin.call(that);\n    that.protocol = getProtocol.call(that);\n    that.username = getUsername.call(that);\n    that.password = getPassword.call(that);\n    that.host = getHost.call(that);\n    that.hostname = getHostname.call(that);\n    that.port = getPort.call(that);\n    that.pathname = getPathname.call(that);\n    that.search = getSearch.call(that);\n    that.searchParams = getSearchParams.call(that);\n    that.hash = getHash.call(that);\n  }\n};\n\nvar URLPrototype = URLConstructor.prototype;\n\nvar serializeURL = function () {\n  var url = getInternalURLState(this);\n  var scheme = url.scheme;\n  var username = url.username;\n  var password = url.password;\n  var host = url.host;\n  var port = url.port;\n  var path = url.path;\n  var query = url.query;\n  var fragment = url.fragment;\n  var output = scheme + ':';\n  if (host !== null) {\n    output += '//';\n    if (includesCredentials(url)) {\n      output += username + (password ? ':' + password : '') + '@';\n    }\n    output += serializeHost(host);\n    if (port !== null) output += ':' + port;\n  } else if (scheme == 'file') output += '//';\n  output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n  if (query !== null) output += '?' + query;\n  if (fragment !== null) output += '#' + fragment;\n  return output;\n};\n\nvar getOrigin = function () {\n  var url = getInternalURLState(this);\n  var scheme = url.scheme;\n  var port = url.port;\n  if (scheme == 'blob') try {\n    return new URL(scheme.path[0]).origin;\n  } catch (error) {\n    return 'null';\n  }\n  if (scheme == 'file' || !isSpecial(url)) return 'null';\n  return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');\n};\n\nvar getProtocol = function () {\n  return getInternalURLState(this).scheme + ':';\n};\n\nvar getUsername = function () {\n  return getInternalURLState(this).username;\n};\n\nvar getPassword = function () {\n  return getInternalURLState(this).password;\n};\n\nvar getHost = function () {\n  var url = getInternalURLState(this);\n  var host = url.host;\n  var port = url.port;\n  return host === null ? ''\n    : port === null ? serializeHost(host)\n    : serializeHost(host) + ':' + port;\n};\n\nvar getHostname = function () {\n  var host = getInternalURLState(this).host;\n  return host === null ? '' : serializeHost(host);\n};\n\nvar getPort = function () {\n  var port = getInternalURLState(this).port;\n  return port === null ? '' : String(port);\n};\n\nvar getPathname = function () {\n  var url = getInternalURLState(this);\n  var path = url.path;\n  return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';\n};\n\nvar getSearch = function () {\n  var query = getInternalURLState(this).query;\n  return query ? '?' + query : '';\n};\n\nvar getSearchParams = function () {\n  return getInternalURLState(this).searchParams;\n};\n\nvar getHash = function () {\n  var fragment = getInternalURLState(this).fragment;\n  return fragment ? '#' + fragment : '';\n};\n\nvar accessorDescriptor = function (getter, setter) {\n  return { get: getter, set: setter, configurable: true, enumerable: true };\n};\n\nif (DESCRIPTORS) {\n  defineProperties(URLPrototype, {\n    // `URL.prototype.href` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-href\n    href: accessorDescriptor(serializeURL, function (href) {\n      var url = getInternalURLState(this);\n      var urlString = String(href);\n      var failure = parseURL(url, urlString);\n      if (failure) throw TypeError(failure);\n      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n    }),\n    // `URL.prototype.origin` getter\n    // https://url.spec.whatwg.org/#dom-url-origin\n    origin: accessorDescriptor(getOrigin),\n    // `URL.prototype.protocol` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-protocol\n    protocol: accessorDescriptor(getProtocol, function (protocol) {\n      var url = getInternalURLState(this);\n      parseURL(url, String(protocol) + ':', SCHEME_START);\n    }),\n    // `URL.prototype.username` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-username\n    username: accessorDescriptor(getUsername, function (username) {\n      var url = getInternalURLState(this);\n      var codePoints = arrayFrom(String(username));\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      url.username = '';\n      for (var i = 0; i < codePoints.length; i++) {\n        url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n      }\n    }),\n    // `URL.prototype.password` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-password\n    password: accessorDescriptor(getPassword, function (password) {\n      var url = getInternalURLState(this);\n      var codePoints = arrayFrom(String(password));\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      url.password = '';\n      for (var i = 0; i < codePoints.length; i++) {\n        url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);\n      }\n    }),\n    // `URL.prototype.host` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-host\n    host: accessorDescriptor(getHost, function (host) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      parseURL(url, String(host), HOST);\n    }),\n    // `URL.prototype.hostname` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-hostname\n    hostname: accessorDescriptor(getHostname, function (hostname) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      parseURL(url, String(hostname), HOSTNAME);\n    }),\n    // `URL.prototype.port` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-port\n    port: accessorDescriptor(getPort, function (port) {\n      var url = getInternalURLState(this);\n      if (cannotHaveUsernamePasswordPort(url)) return;\n      port = String(port);\n      if (port == '') url.port = null;\n      else parseURL(url, port, PORT);\n    }),\n    // `URL.prototype.pathname` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-pathname\n    pathname: accessorDescriptor(getPathname, function (pathname) {\n      var url = getInternalURLState(this);\n      if (url.cannotBeABaseURL) return;\n      url.path = [];\n      parseURL(url, pathname + '', PATH_START);\n    }),\n    // `URL.prototype.search` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-search\n    search: accessorDescriptor(getSearch, function (search) {\n      var url = getInternalURLState(this);\n      search = String(search);\n      if (search == '') {\n        url.query = null;\n      } else {\n        if ('?' == search.charAt(0)) search = search.slice(1);\n        url.query = '';\n        parseURL(url, search, QUERY);\n      }\n      getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);\n    }),\n    // `URL.prototype.searchParams` getter\n    // https://url.spec.whatwg.org/#dom-url-searchparams\n    searchParams: accessorDescriptor(getSearchParams),\n    // `URL.prototype.hash` accessors pair\n    // https://url.spec.whatwg.org/#dom-url-hash\n    hash: accessorDescriptor(getHash, function (hash) {\n      var url = getInternalURLState(this);\n      hash = String(hash);\n      if (hash == '') {\n        url.fragment = null;\n        return;\n      }\n      if ('#' == hash.charAt(0)) hash = hash.slice(1);\n      url.fragment = '';\n      parseURL(url, hash, FRAGMENT);\n    })\n  });\n}\n\n// `URL.prototype.toJSON` method\n// https://url.spec.whatwg.org/#dom-url-tojson\nredefine(URLPrototype, 'toJSON', function toJSON() {\n  return serializeURL.call(this);\n}, { enumerable: true });\n\n// `URL.prototype.toString` method\n// https://url.spec.whatwg.org/#URL-stringification-behavior\nredefine(URLPrototype, 'toString', function toString() {\n  return serializeURL.call(this);\n}, { enumerable: true });\n\nif (NativeURL) {\n  var nativeCreateObjectURL = NativeURL.createObjectURL;\n  var nativeRevokeObjectURL = NativeURL.revokeObjectURL;\n  // `URL.createObjectURL` method\n  // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\n  // eslint-disable-next-line no-unused-vars -- required for `.length`\n  if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {\n    return nativeCreateObjectURL.apply(NativeURL, arguments);\n  });\n  // `URL.revokeObjectURL` method\n  // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL\n  // eslint-disable-next-line no-unused-vars -- required for `.length`\n  if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {\n    return nativeRevokeObjectURL.apply(NativeURL, arguments);\n  });\n}\n\nsetToStringTag(URLConstructor, 'URL');\n\n$({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {\n  URL: URLConstructor\n});\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./sha1\"), require(\"./hmac\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./sha1\", \"./hmac\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var Base = C_lib.Base;\n\t    var WordArray = C_lib.WordArray;\n\t    var C_algo = C.algo;\n\t    var MD5 = C_algo.MD5;\n\n\t    /**\n\t     * This key derivation function is meant to conform with EVP_BytesToKey.\n\t     * www.openssl.org/docs/crypto/EVP_BytesToKey.html\n\t     */\n\t    var EvpKDF = C_algo.EvpKDF = Base.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {number} keySize The key size in words to generate. Default: 4 (128 bits)\n\t         * @property {Hasher} hasher The hash algorithm to use. Default: MD5\n\t         * @property {number} iterations The number of iterations to perform. Default: 1\n\t         */\n\t        cfg: Base.extend({\n\t            keySize: 128/32,\n\t            hasher: MD5,\n\t            iterations: 1\n\t        }),\n\n\t        /**\n\t         * Initializes a newly created key derivation function.\n\t         *\n\t         * @param {Object} cfg (Optional) The configuration options to use for the derivation.\n\t         *\n\t         * @example\n\t         *\n\t         *     var kdf = CryptoJS.algo.EvpKDF.create();\n\t         *     var kdf = CryptoJS.algo.EvpKDF.create({ keySize: 8 });\n\t         *     var kdf = CryptoJS.algo.EvpKDF.create({ keySize: 8, iterations: 1000 });\n\t         */\n\t        init: function (cfg) {\n\t            this.cfg = this.cfg.extend(cfg);\n\t        },\n\n\t        /**\n\t         * Derives a key from a password.\n\t         *\n\t         * @param {WordArray|string} password The password.\n\t         * @param {WordArray|string} salt A salt.\n\t         *\n\t         * @return {WordArray} The derived key.\n\t         *\n\t         * @example\n\t         *\n\t         *     var key = kdf.compute(password, salt);\n\t         */\n\t        compute: function (password, salt) {\n\t            var block;\n\n\t            // Shortcut\n\t            var cfg = this.cfg;\n\n\t            // Init hasher\n\t            var hasher = cfg.hasher.create();\n\n\t            // Initial values\n\t            var derivedKey = WordArray.create();\n\n\t            // Shortcuts\n\t            var derivedKeyWords = derivedKey.words;\n\t            var keySize = cfg.keySize;\n\t            var iterations = cfg.iterations;\n\n\t            // Generate key\n\t            while (derivedKeyWords.length < keySize) {\n\t                if (block) {\n\t                    hasher.update(block);\n\t                }\n\t                block = hasher.update(password).finalize(salt);\n\t                hasher.reset();\n\n\t                // Iterations\n\t                for (var i = 1; i < iterations; i++) {\n\t                    block = hasher.finalize(block);\n\t                    hasher.reset();\n\t                }\n\n\t                derivedKey.concat(block);\n\t            }\n\t            derivedKey.sigBytes = keySize * 4;\n\n\t            return derivedKey;\n\t        }\n\t    });\n\n\t    /**\n\t     * Derives a key from a password.\n\t     *\n\t     * @param {WordArray|string} password The password.\n\t     * @param {WordArray|string} salt A salt.\n\t     * @param {Object} cfg (Optional) The configuration options to use for this computation.\n\t     *\n\t     * @return {WordArray} The derived key.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var key = CryptoJS.EvpKDF(password, salt);\n\t     *     var key = CryptoJS.EvpKDF(password, salt, { keySize: 8 });\n\t     *     var key = CryptoJS.EvpKDF(password, salt, { keySize: 8, iterations: 1000 });\n\t     */\n\t    C.EvpKDF = function (password, salt, cfg) {\n\t        return EvpKDF.create(cfg).compute(password, salt);\n\t    };\n\t}());\n\n\n\treturn CryptoJS.EvpKDF;\n\n}));","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// Default exports for Node. Export the extended versions of VTTCue and\n// VTTRegion in Node since we likely want the capability to convert back and\n// forth between JSON. If we don't then it's not that big of a deal since we're\n// off browser.\n\nvar window = require('global/window');\n\nvar vttjs = module.exports = {\n  WebVTT: require(\"./vtt.js\"),\n  VTTCue: require(\"./vttcue.js\"),\n  VTTRegion: require(\"./vttregion.js\")\n};\n\nwindow.vttjs = vttjs;\nwindow.WebVTT = vttjs.WebVTT;\n\nvar cueShim = vttjs.VTTCue;\nvar regionShim = vttjs.VTTRegion;\nvar nativeVTTCue = window.VTTCue;\nvar nativeVTTRegion = window.VTTRegion;\n\nvttjs.shim = function() {\n  window.VTTCue = cueShim;\n  window.VTTRegion = regionShim;\n};\n\nvttjs.restore = function() {\n  window.VTTCue = nativeVTTCue;\n  window.VTTRegion = nativeVTTRegion;\n};\n\nif (!window.VTTCue) {\n  vttjs.shim();\n}\n","/**\n * mux.js\n *\n * Copyright (c) 2015 Brightcove\n * All rights reserved.\n *\n * A stream-based mp2t to mp4 converter. This utility can be used to\n * deliver mp4s to a SourceBuffer on platforms that support native\n * Media Source Extensions.\n */\n'use strict';\n\nvar Stream = require('../utils/stream.js');\nvar mp4 = require('./mp4-generator.js');\nvar m2ts = require('../m2ts/m2ts.js');\nvar AdtsStream = require('../codecs/adts.js');\nvar H264Stream = require('../codecs/h264').H264Stream;\nvar AacStream = require('../aac');\nvar coneOfSilence = require('../data/silence');\nvar clock = require('../utils/clock');\n\n// constants\nvar AUDIO_PROPERTIES = [\n  'audioobjecttype',\n  'channelcount',\n  'samplerate',\n  'samplingfrequencyindex',\n  'samplesize'\n];\n\nvar VIDEO_PROPERTIES = [\n  'width',\n  'height',\n  'profileIdc',\n  'levelIdc',\n  'profileCompatibility'\n];\n\nvar ONE_SECOND_IN_TS = 90000; // 90kHz clock\n\n// object types\nvar VideoSegmentStream, AudioSegmentStream, Transmuxer, CoalesceStream;\n\n// Helper functions\nvar\n  createDefaultSample,\n  isLikelyAacData,\n  collectDtsInfo,\n  clearDtsInfo,\n  calculateTrackBaseMediaDecodeTime,\n  arrayEquals,\n  sumFrameByteLengths;\n\n/**\n * Default sample object\n * see ISO/IEC 14496-12:2012, section 8.6.4.3\n */\ncreateDefaultSample = function() {\n  return {\n    size: 0,\n    flags: {\n      isLeading: 0,\n      dependsOn: 1,\n      isDependedOn: 0,\n      hasRedundancy: 0,\n      degradationPriority: 0\n    }\n  };\n};\n\nisLikelyAacData = function(data) {\n  if ((data[0] === 'I'.charCodeAt(0)) &&\n      (data[1] === 'D'.charCodeAt(0)) &&\n      (data[2] === '3'.charCodeAt(0))) {\n    return true;\n  }\n  return false;\n};\n\n/**\n * Compare two arrays (even typed) for same-ness\n */\narrayEquals = function(a, b) {\n  var\n    i;\n\n  if (a.length !== b.length) {\n    return false;\n  }\n\n  // compare the value of each element in the array\n  for (i = 0; i < a.length; i++) {\n    if (a[i] !== b[i]) {\n      return false;\n    }\n  }\n\n  return true;\n};\n\n/**\n * Sum the `byteLength` properties of the data in each AAC frame\n */\nsumFrameByteLengths = function(array) {\n  var\n    i,\n    currentObj,\n    sum = 0;\n\n  // sum the byteLength's all each nal unit in the frame\n  for (i = 0; i < array.length; i++) {\n    currentObj = array[i];\n    sum += currentObj.data.byteLength;\n  }\n\n  return sum;\n};\n\n/**\n * Constructs a single-track, ISO BMFF media segment from AAC data\n * events. The output of this stream can be fed to a SourceBuffer\n * configured with a suitable initialization segment.\n */\nAudioSegmentStream = function(track) {\n  var\n    adtsFrames = [],\n    sequenceNumber = 0,\n    earliestAllowedDts = 0,\n    audioAppendStartTs = 0,\n    videoBaseMediaDecodeTime = Infinity;\n\n  AudioSegmentStream.prototype.init.call(this);\n\n  this.push = function(data) {\n    collectDtsInfo(track, data);\n\n    if (track) {\n      AUDIO_PROPERTIES.forEach(function(prop) {\n        track[prop] = data[prop];\n      });\n    }\n\n    // buffer audio data until end() is called\n    adtsFrames.push(data);\n  };\n\n  this.setEarliestDts = function(earliestDts) {\n    earliestAllowedDts = earliestDts - track.timelineStartInfo.baseMediaDecodeTime;\n  };\n\n  this.setVideoBaseMediaDecodeTime = function(baseMediaDecodeTime) {\n    videoBaseMediaDecodeTime = baseMediaDecodeTime;\n  };\n\n  this.setAudioAppendStart = function(timestamp) {\n    audioAppendStartTs = timestamp;\n  };\n\n  this.flush = function() {\n    var\n      frames,\n      moof,\n      mdat,\n      boxes;\n\n    // return early if no audio data has been observed\n    if (adtsFrames.length === 0) {\n      this.trigger('done', 'AudioSegmentStream');\n      return;\n    }\n\n    frames = this.trimAdtsFramesByEarliestDts_(adtsFrames);\n    track.baseMediaDecodeTime = calculateTrackBaseMediaDecodeTime(track);\n\n    this.prefixWithSilence_(track, frames);\n\n    // we have to build the index from byte locations to\n    // samples (that is, adts frames) in the audio data\n    track.samples = this.generateSampleTable_(frames);\n\n    // concatenate the audio data to constuct the mdat\n    mdat = mp4.mdat(this.concatenateFrameData_(frames));\n\n    adtsFrames = [];\n\n    moof = mp4.moof(sequenceNumber, [track]);\n    boxes = new Uint8Array(moof.byteLength + mdat.byteLength);\n\n    // bump the sequence number for next time\n    sequenceNumber++;\n\n    boxes.set(moof);\n    boxes.set(mdat, moof.byteLength);\n\n    clearDtsInfo(track);\n\n    this.trigger('data', {track: track, boxes: boxes});\n    this.trigger('done', 'AudioSegmentStream');\n  };\n\n  // Possibly pad (prefix) the audio track with silence if appending this track\n  // would lead to the introduction of a gap in the audio buffer\n  this.prefixWithSilence_ = function(track, frames) {\n    var\n      baseMediaDecodeTimeTs,\n      frameDuration = 0,\n      audioGapDuration = 0,\n      audioFillFrameCount = 0,\n      audioFillDuration = 0,\n      silentFrame,\n      i;\n\n    if (!frames.length) {\n      return;\n    }\n\n    baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate);\n    // determine frame clock duration based on sample rate, round up to avoid overfills\n    frameDuration = Math.ceil(ONE_SECOND_IN_TS / (track.samplerate / 1024));\n\n    if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n      // insert the shortest possible amount (audio gap or audio to video gap)\n      audioGapDuration =\n        baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime);\n      // number of full frames in the audio gap\n      audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n      audioFillDuration = audioFillFrameCount * frameDuration;\n    }\n\n    // don't attempt to fill gaps smaller than a single frame or larger\n    // than a half second\n    if (audioFillFrameCount < 1 || audioFillDuration > ONE_SECOND_IN_TS / 2) {\n      return;\n    }\n\n    silentFrame = coneOfSilence[track.samplerate];\n\n    if (!silentFrame) {\n      // we don't have a silent frame pregenerated for the sample rate, so use a frame\n      // from the content instead\n      silentFrame = frames[0].data;\n    }\n\n    for (i = 0; i < audioFillFrameCount; i++) {\n      frames.splice(i, 0, {\n        data: silentFrame\n      });\n    }\n\n    track.baseMediaDecodeTime -=\n      Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));\n  };\n\n  // If the audio segment extends before the earliest allowed dts\n  // value, remove AAC frames until starts at or after the earliest\n  // allowed DTS so that we don't end up with a negative baseMedia-\n  // DecodeTime for the audio track\n  this.trimAdtsFramesByEarliestDts_ = function(adtsFrames) {\n    if (track.minSegmentDts >= earliestAllowedDts) {\n      return adtsFrames;\n    }\n\n    // We will need to recalculate the earliest segment Dts\n    track.minSegmentDts = Infinity;\n\n    return adtsFrames.filter(function(currentFrame) {\n      // If this is an allowed frame, keep it and record it's Dts\n      if (currentFrame.dts >= earliestAllowedDts) {\n        track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n        track.minSegmentPts = track.minSegmentDts;\n        return true;\n      }\n      // Otherwise, discard it\n      return false;\n    });\n  };\n\n  // generate the track's raw mdat data from an array of frames\n  this.generateSampleTable_ = function(frames) {\n    var\n      i,\n      currentFrame,\n      samples = [];\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      samples.push({\n        size: currentFrame.data.byteLength,\n        duration: 1024 // For AAC audio, all samples contain 1024 samples\n      });\n    }\n    return samples;\n  };\n\n  // generate the track's sample table from an array of frames\n  this.concatenateFrameData_ = function(frames) {\n    var\n      i,\n      currentFrame,\n      dataOffset = 0,\n      data = new Uint8Array(sumFrameByteLengths(frames));\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n\n      data.set(currentFrame.data, dataOffset);\n      dataOffset += currentFrame.data.byteLength;\n    }\n    return data;\n  };\n};\n\nAudioSegmentStream.prototype = new Stream();\n\n/**\n * Constructs a single-track, ISO BMFF media segment from H264 data\n * events. The output of this stream can be fed to a SourceBuffer\n * configured with a suitable initialization segment.\n * @param track {object} track metadata configuration\n * @param options {object} transmuxer options object\n * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n *        gopsToAlignWith list when attempting to align gop pts\n */\nVideoSegmentStream = function(track, options) {\n  var\n    sequenceNumber = 0,\n    nalUnits = [],\n    gopsToAlignWith = [],\n    config,\n    pps;\n\n  options = options || {};\n\n  VideoSegmentStream.prototype.init.call(this);\n\n  delete track.minPTS;\n\n  this.gopCache_ = [];\n\n  this.push = function(nalUnit) {\n    collectDtsInfo(track, nalUnit);\n\n    // record the track config\n    if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n      config = nalUnit.config;\n      track.sps = [nalUnit.data];\n\n      VIDEO_PROPERTIES.forEach(function(prop) {\n        track[prop] = config[prop];\n      }, this);\n    }\n\n    if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' &&\n        !pps) {\n      pps = nalUnit.data;\n      track.pps = [nalUnit.data];\n    }\n\n    // buffer video until flush() is called\n    nalUnits.push(nalUnit);\n  };\n\n  this.flush = function() {\n    var\n      frames,\n      gopForFusion,\n      gops,\n      moof,\n      mdat,\n      boxes;\n\n    // Throw away nalUnits at the start of the byte stream until\n    // we find the first AUD\n    while (nalUnits.length) {\n      if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n        break;\n      }\n      nalUnits.shift();\n    }\n\n    // Return early if no video data has been observed\n    if (nalUnits.length === 0) {\n      this.resetStream_();\n      this.trigger('done', 'VideoSegmentStream');\n      return;\n    }\n\n    // Organize the raw nal-units into arrays that represent\n    // higher-level constructs such as frames and gops\n    // (group-of-pictures)\n    frames = this.groupNalsIntoFrames_(nalUnits);\n    gops = this.groupFramesIntoGops_(frames);\n\n    // If the first frame of this fragment is not a keyframe we have\n    // a problem since MSE (on Chrome) requires a leading keyframe.\n    //\n    // We have two approaches to repairing this situation:\n    // 1) GOP-FUSION:\n    //    This is where we keep track of the GOPS (group-of-pictures)\n    //    from previous fragments and attempt to find one that we can\n    //    prepend to the current fragment in order to create a valid\n    //    fragment.\n    // 2) KEYFRAME-PULLING:\n    //    Here we search for the first keyframe in the fragment and\n    //    throw away all the frames between the start of the fragment\n    //    and that keyframe. We then extend the duration and pull the\n    //    PTS of the keyframe forward so that it covers the time range\n    //    of the frames that were disposed of.\n    //\n    // #1 is far prefereable over #2 which can cause \"stuttering\" but\n    // requires more things to be just right.\n    if (!gops[0][0].keyFrame) {\n      // Search for a gop for fusion from our gopCache\n      gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n\n      if (gopForFusion) {\n        gops.unshift(gopForFusion);\n        // Adjust Gops' metadata to account for the inclusion of the\n        // new gop at the beginning\n        gops.byteLength += gopForFusion.byteLength;\n        gops.nalCount += gopForFusion.nalCount;\n        gops.pts = gopForFusion.pts;\n        gops.dts = gopForFusion.dts;\n        gops.duration += gopForFusion.duration;\n      } else {\n        // If we didn't find a candidate gop fall back to keyrame-pulling\n        gops = this.extendFirstKeyFrame_(gops);\n      }\n    }\n\n    // Trim gops to align with gopsToAlignWith\n    if (gopsToAlignWith.length) {\n      var alignedGops;\n\n      if (options.alignGopsAtEnd) {\n        alignedGops = this.alignGopsAtEnd_(gops);\n      } else {\n        alignedGops = this.alignGopsAtStart_(gops);\n      }\n\n      if (!alignedGops) {\n        // save all the nals in the last GOP into the gop cache\n        this.gopCache_.unshift({\n          gop: gops.pop(),\n          pps: track.pps,\n          sps: track.sps\n        });\n\n        // Keep a maximum of 6 GOPs in the cache\n        this.gopCache_.length = Math.min(6, this.gopCache_.length);\n\n        // Clear nalUnits\n        nalUnits = [];\n\n        // return early no gops can be aligned with desired gopsToAlignWith\n        this.resetStream_();\n        this.trigger('done', 'VideoSegmentStream');\n        return;\n      }\n\n      // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n      // when recalculated before sending off to CoalesceStream\n      clearDtsInfo(track);\n\n      gops = alignedGops;\n    }\n\n    collectDtsInfo(track, gops);\n\n    // First, we have to build the index from byte locations to\n    // samples (that is, frames) in the video data\n    track.samples = this.generateSampleTable_(gops);\n\n    // Concatenate the video data and construct the mdat\n    mdat = mp4.mdat(this.concatenateNalData_(gops));\n\n    track.baseMediaDecodeTime = calculateTrackBaseMediaDecodeTime(track);\n\n    this.trigger('processedGopsInfo', gops.map(function(gop) {\n      return {\n        pts: gop.pts,\n        dts: gop.dts,\n        byteLength: gop.byteLength\n      };\n    }));\n\n    // save all the nals in the last GOP into the gop cache\n    this.gopCache_.unshift({\n      gop: gops.pop(),\n      pps: track.pps,\n      sps: track.sps\n    });\n\n    // Keep a maximum of 6 GOPs in the cache\n    this.gopCache_.length = Math.min(6, this.gopCache_.length);\n\n    // Clear nalUnits\n    nalUnits = [];\n\n    this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n    this.trigger('timelineStartInfo', track.timelineStartInfo);\n\n    moof = mp4.moof(sequenceNumber, [track]);\n\n    // it would be great to allocate this array up front instead of\n    // throwing away hundreds of media segment fragments\n    boxes = new Uint8Array(moof.byteLength + mdat.byteLength);\n\n    // Bump the sequence number for next time\n    sequenceNumber++;\n\n    boxes.set(moof);\n    boxes.set(mdat, moof.byteLength);\n\n    this.trigger('data', {track: track, boxes: boxes});\n\n    this.resetStream_();\n\n    // Continue with the flush process now\n    this.trigger('done', 'VideoSegmentStream');\n  };\n\n  this.resetStream_ = function() {\n    clearDtsInfo(track);\n\n    // reset config and pps because they may differ across segments\n    // for instance, when we are rendition switching\n    config = undefined;\n    pps = undefined;\n  };\n\n  // Search for a candidate Gop for gop-fusion from the gop cache and\n  // return it or return null if no good candidate was found\n  this.getGopForFusion_ = function(nalUnit) {\n    var\n      halfSecond = 45000, // Half-a-second in a 90khz clock\n      allowableOverlap = 10000, // About 3 frames @ 30fps\n      nearestDistance = Infinity,\n      dtsDistance,\n      nearestGopObj,\n      currentGop,\n      currentGopObj,\n      i;\n\n    // Search for the GOP nearest to the beginning of this nal unit\n    for (i = 0; i < this.gopCache_.length; i++) {\n      currentGopObj = this.gopCache_[i];\n      currentGop = currentGopObj.gop;\n\n      // Reject Gops with different SPS or PPS\n      if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) ||\n          !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n        continue;\n      }\n\n      // Reject Gops that would require a negative baseMediaDecodeTime\n      if (currentGop.dts < track.timelineStartInfo.dts) {\n        continue;\n      }\n\n      // The distance between the end of the gop and the start of the nalUnit\n      dtsDistance = (nalUnit.dts - currentGop.dts) - currentGop.duration;\n\n      // Only consider GOPS that start before the nal unit and end within\n      // a half-second of the nal unit\n      if (dtsDistance >= -allowableOverlap &&\n          dtsDistance <= halfSecond) {\n\n        // Always use the closest GOP we found if there is more than\n        // one candidate\n        if (!nearestGopObj ||\n            nearestDistance > dtsDistance) {\n          nearestGopObj = currentGopObj;\n          nearestDistance = dtsDistance;\n        }\n      }\n    }\n\n    if (nearestGopObj) {\n      return nearestGopObj.gop;\n    }\n    return null;\n  };\n\n  this.extendFirstKeyFrame_ = function(gops) {\n    var currentGop;\n\n    if (!gops[0][0].keyFrame && gops.length > 1) {\n      // Remove the first GOP\n      currentGop = gops.shift();\n\n      gops.byteLength -=  currentGop.byteLength;\n      gops.nalCount -= currentGop.nalCount;\n\n      // Extend the first frame of what is now the\n      // first gop to cover the time period of the\n      // frames we just removed\n      gops[0][0].dts = currentGop.dts;\n      gops[0][0].pts = currentGop.pts;\n      gops[0][0].duration += currentGop.duration;\n    }\n\n    return gops;\n  };\n\n  // Convert an array of nal units into an array of frames with each frame being\n  // composed of the nal units that make up that frame\n  // Also keep track of cummulative data about the frame from the nal units such\n  // as the frame duration, starting pts, etc.\n  this.groupNalsIntoFrames_ = function(nalUnits) {\n    var\n      i,\n      currentNal,\n      currentFrame = [],\n      frames = [];\n\n    currentFrame.byteLength = 0;\n\n    for (i = 0; i < nalUnits.length; i++) {\n      currentNal = nalUnits[i];\n\n      // Split on 'aud'-type nal units\n      if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n        // Since the very first nal unit is expected to be an AUD\n        // only push to the frames array when currentFrame is not empty\n        if (currentFrame.length) {\n          currentFrame.duration = currentNal.dts - currentFrame.dts;\n          frames.push(currentFrame);\n        }\n        currentFrame = [currentNal];\n        currentFrame.byteLength = currentNal.data.byteLength;\n        currentFrame.pts = currentNal.pts;\n        currentFrame.dts = currentNal.dts;\n      } else {\n        // Specifically flag key frames for ease of use later\n        if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n          currentFrame.keyFrame = true;\n        }\n        currentFrame.duration = currentNal.dts - currentFrame.dts;\n        currentFrame.byteLength += currentNal.data.byteLength;\n        currentFrame.push(currentNal);\n      }\n    }\n\n    // For the last frame, use the duration of the previous frame if we\n    // have nothing better to go on\n    if (frames.length &&\n        (!currentFrame.duration ||\n         currentFrame.duration <= 0)) {\n      currentFrame.duration = frames[frames.length - 1].duration;\n    }\n\n    // Push the final frame\n    frames.push(currentFrame);\n    return frames;\n  };\n\n  // Convert an array of frames into an array of Gop with each Gop being composed\n  // of the frames that make up that Gop\n  // Also keep track of cummulative data about the Gop from the frames such as the\n  // Gop duration, starting pts, etc.\n  this.groupFramesIntoGops_ = function(frames) {\n    var\n      i,\n      currentFrame,\n      currentGop = [],\n      gops = [];\n\n    // We must pre-set some of the values on the Gop since we\n    // keep running totals of these values\n    currentGop.byteLength = 0;\n    currentGop.nalCount = 0;\n    currentGop.duration = 0;\n    currentGop.pts = frames[0].pts;\n    currentGop.dts = frames[0].dts;\n\n    // store some metadata about all the Gops\n    gops.byteLength = 0;\n    gops.nalCount = 0;\n    gops.duration = 0;\n    gops.pts = frames[0].pts;\n    gops.dts = frames[0].dts;\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n\n      if (currentFrame.keyFrame) {\n        // Since the very first frame is expected to be an keyframe\n        // only push to the gops array when currentGop is not empty\n        if (currentGop.length) {\n          gops.push(currentGop);\n          gops.byteLength += currentGop.byteLength;\n          gops.nalCount += currentGop.nalCount;\n          gops.duration += currentGop.duration;\n        }\n\n        currentGop = [currentFrame];\n        currentGop.nalCount = currentFrame.length;\n        currentGop.byteLength = currentFrame.byteLength;\n        currentGop.pts = currentFrame.pts;\n        currentGop.dts = currentFrame.dts;\n        currentGop.duration = currentFrame.duration;\n      } else {\n        currentGop.duration += currentFrame.duration;\n        currentGop.nalCount += currentFrame.length;\n        currentGop.byteLength += currentFrame.byteLength;\n        currentGop.push(currentFrame);\n      }\n    }\n\n    if (gops.length && currentGop.duration <= 0) {\n      currentGop.duration = gops[gops.length - 1].duration;\n    }\n    gops.byteLength += currentGop.byteLength;\n    gops.nalCount += currentGop.nalCount;\n    gops.duration += currentGop.duration;\n\n    // push the final Gop\n    gops.push(currentGop);\n    return gops;\n  };\n\n  // generate the track's sample table from an array of gops\n  this.generateSampleTable_ = function(gops, baseDataOffset) {\n    var\n      h, i,\n      sample,\n      currentGop,\n      currentFrame,\n      dataOffset = baseDataOffset || 0,\n      samples = [];\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h];\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i];\n\n        sample = createDefaultSample();\n\n        sample.dataOffset = dataOffset;\n        sample.compositionTimeOffset = currentFrame.pts - currentFrame.dts;\n        sample.duration = currentFrame.duration;\n        sample.size = 4 * currentFrame.length; // Space for nal unit size\n        sample.size += currentFrame.byteLength;\n\n        if (currentFrame.keyFrame) {\n          sample.flags.dependsOn = 2;\n        }\n\n        dataOffset += sample.size;\n\n        samples.push(sample);\n      }\n    }\n    return samples;\n  };\n\n  // generate the track's raw mdat data from an array of gops\n  this.concatenateNalData_ = function(gops) {\n    var\n      h, i, j,\n      currentGop,\n      currentFrame,\n      currentNal,\n      dataOffset = 0,\n      nalsByteLength = gops.byteLength,\n      numberOfNals = gops.nalCount,\n      totalByteLength = nalsByteLength + 4 * numberOfNals,\n      data = new Uint8Array(totalByteLength),\n      view = new DataView(data.buffer);\n\n    // For each Gop..\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h];\n\n      // For each Frame..\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i];\n\n        // For each NAL..\n        for (j = 0; j < currentFrame.length; j++) {\n          currentNal = currentFrame[j];\n\n          view.setUint32(dataOffset, currentNal.data.byteLength);\n          dataOffset += 4;\n          data.set(currentNal.data, dataOffset);\n          dataOffset += currentNal.data.byteLength;\n        }\n      }\n    }\n    return data;\n  };\n\n  // trim gop list to the first gop found that has a matching pts with a gop in the list\n  // of gopsToAlignWith starting from the START of the list\n  this.alignGopsAtStart_ = function(gops) {\n    var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n\n    byteLength = gops.byteLength;\n    nalCount = gops.nalCount;\n    duration = gops.duration;\n    alignIndex = gopIndex = 0;\n\n    while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n      align = gopsToAlignWith[alignIndex];\n      gop = gops[gopIndex];\n\n      if (align.pts === gop.pts) {\n        break;\n      }\n\n      if (gop.pts > align.pts) {\n        // this current gop starts after the current gop we want to align on, so increment\n        // align index\n        alignIndex++;\n        continue;\n      }\n\n      // current gop starts before the current gop we want to align on. so increment gop\n      // index\n      gopIndex++;\n      byteLength -= gop.byteLength;\n      nalCount -= gop.nalCount;\n      duration -= gop.duration;\n    }\n\n    if (gopIndex === 0) {\n      // no gops to trim\n      return gops;\n    }\n\n    if (gopIndex === gops.length) {\n      // all gops trimmed, skip appending all gops\n      return null;\n    }\n\n    alignedGops = gops.slice(gopIndex);\n    alignedGops.byteLength = byteLength;\n    alignedGops.duration = duration;\n    alignedGops.nalCount = nalCount;\n    alignedGops.pts = alignedGops[0].pts;\n    alignedGops.dts = alignedGops[0].dts;\n\n    return alignedGops;\n  };\n\n  // trim gop list to the first gop found that has a matching pts with a gop in the list\n  // of gopsToAlignWith starting from the END of the list\n  this.alignGopsAtEnd_ = function(gops) {\n    var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n\n    alignIndex = gopsToAlignWith.length - 1;\n    gopIndex = gops.length - 1;\n    alignEndIndex = null;\n    matchFound = false;\n\n    while (alignIndex >= 0 && gopIndex >= 0) {\n      align = gopsToAlignWith[alignIndex];\n      gop = gops[gopIndex];\n\n      if (align.pts === gop.pts) {\n        matchFound = true;\n        break;\n      }\n\n      if (align.pts > gop.pts) {\n        alignIndex--;\n        continue;\n      }\n\n      if (alignIndex === gopsToAlignWith.length - 1) {\n        // gop.pts is greater than the last alignment candidate. If no match is found\n        // by the end of this loop, we still want to append gops that come after this\n        // point\n        alignEndIndex = gopIndex;\n      }\n\n      gopIndex--;\n    }\n\n    if (!matchFound && alignEndIndex === null) {\n      return null;\n    }\n\n    var trimIndex;\n\n    if (matchFound) {\n      trimIndex = gopIndex;\n    } else {\n      trimIndex = alignEndIndex;\n    }\n\n    if (trimIndex === 0) {\n      return gops;\n    }\n\n    var alignedGops = gops.slice(trimIndex);\n    var metadata = alignedGops.reduce(function(total, gop) {\n      total.byteLength += gop.byteLength;\n      total.duration += gop.duration;\n      total.nalCount += gop.nalCount;\n      return total;\n    }, { byteLength: 0, duration: 0, nalCount: 0 });\n\n    alignedGops.byteLength = metadata.byteLength;\n    alignedGops.duration = metadata.duration;\n    alignedGops.nalCount = metadata.nalCount;\n    alignedGops.pts = alignedGops[0].pts;\n    alignedGops.dts = alignedGops[0].dts;\n\n    return alignedGops;\n  };\n\n  this.alignGopsWith = function(newGopsToAlignWith) {\n    gopsToAlignWith = newGopsToAlignWith;\n  };\n};\n\nVideoSegmentStream.prototype = new Stream();\n\n/**\n * Store information about the start and end of the track and the\n * duration for each frame/sample we process in order to calculate\n * the baseMediaDecodeTime\n */\ncollectDtsInfo = function(track, data) {\n  if (typeof data.pts === 'number') {\n    if (track.timelineStartInfo.pts === undefined) {\n      track.timelineStartInfo.pts = data.pts;\n    }\n\n    if (track.minSegmentPts === undefined) {\n      track.minSegmentPts = data.pts;\n    } else {\n      track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n    }\n\n    if (track.maxSegmentPts === undefined) {\n      track.maxSegmentPts = data.pts;\n    } else {\n      track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n    }\n  }\n\n  if (typeof data.dts === 'number') {\n    if (track.timelineStartInfo.dts === undefined) {\n      track.timelineStartInfo.dts = data.dts;\n    }\n\n    if (track.minSegmentDts === undefined) {\n      track.minSegmentDts = data.dts;\n    } else {\n      track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n    }\n\n    if (track.maxSegmentDts === undefined) {\n      track.maxSegmentDts = data.dts;\n    } else {\n      track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n    }\n  }\n};\n\n/**\n * Clear values used to calculate the baseMediaDecodeTime between\n * tracks\n */\nclearDtsInfo = function(track) {\n  delete track.minSegmentDts;\n  delete track.maxSegmentDts;\n  delete track.minSegmentPts;\n  delete track.maxSegmentPts;\n};\n\n/**\n * Calculate the track's baseMediaDecodeTime based on the earliest\n * DTS the transmuxer has ever seen and the minimum DTS for the\n * current track\n */\ncalculateTrackBaseMediaDecodeTime = function(track) {\n  var\n    baseMediaDecodeTime,\n    scale,\n    // Calculate the distance, in time, that this segment starts from the start\n    // of the timeline (earliest time seen since the transmuxer initialized)\n    timeSinceStartOfTimeline = track.minSegmentDts - track.timelineStartInfo.dts;\n\n  // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n  // we want the start of the first segment to be placed\n  baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime;\n\n  // Add to that the distance this segment is from the very first\n  baseMediaDecodeTime += timeSinceStartOfTimeline;\n\n  // baseMediaDecodeTime must not become negative\n  baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n\n  if (track.type === 'audio') {\n    // Audio has a different clock equal to the sampling_rate so we need to\n    // scale the PTS values into the clock rate of the track\n    scale = track.samplerate / ONE_SECOND_IN_TS;\n    baseMediaDecodeTime *= scale;\n    baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n  }\n\n  return baseMediaDecodeTime;\n};\n\n/**\n * A Stream that can combine multiple streams (ie. audio & video)\n * into a single output segment for MSE. Also supports audio-only\n * and video-only streams.\n */\nCoalesceStream = function(options, metadataStream) {\n  // Number of Tracks per output segment\n  // If greater than 1, we combine multiple\n  // tracks into a single segment\n  this.numberOfTracks = 0;\n  this.metadataStream = metadataStream;\n\n  if (typeof options.remux !== 'undefined') {\n    this.remuxTracks = !!options.remux;\n  } else {\n    this.remuxTracks = true;\n  }\n\n  this.pendingTracks = [];\n  this.videoTrack = null;\n  this.pendingBoxes = [];\n  this.pendingCaptions = [];\n  this.pendingMetadata = [];\n  this.pendingBytes = 0;\n  this.emittedTracks = 0;\n\n  CoalesceStream.prototype.init.call(this);\n\n  // Take output from multiple\n  this.push = function(output) {\n    // buffer incoming captions until the associated video segment\n    // finishes\n    if (output.text) {\n      return this.pendingCaptions.push(output);\n    }\n    // buffer incoming id3 tags until the final flush\n    if (output.frames) {\n      return this.pendingMetadata.push(output);\n    }\n\n    // Add this track to the list of pending tracks and store\n    // important information required for the construction of\n    // the final segment\n    this.pendingTracks.push(output.track);\n    this.pendingBoxes.push(output.boxes);\n    this.pendingBytes += output.boxes.byteLength;\n\n    if (output.track.type === 'video') {\n      this.videoTrack = output.track;\n    }\n    if (output.track.type === 'audio') {\n      this.audioTrack = output.track;\n    }\n  };\n};\n\nCoalesceStream.prototype = new Stream();\nCoalesceStream.prototype.flush = function(flushSource) {\n  var\n    offset = 0,\n    event = {\n      captions: [],\n      captionStreams: {},\n      metadata: [],\n      info: {}\n    },\n    caption,\n    id3,\n    initSegment,\n    timelineStartPts = 0,\n    i;\n\n  if (this.pendingTracks.length < this.numberOfTracks) {\n    if (flushSource !== 'VideoSegmentStream' &&\n        flushSource !== 'AudioSegmentStream') {\n      // Return because we haven't received a flush from a data-generating\n      // portion of the segment (meaning that we have only recieved meta-data\n      // or captions.)\n      return;\n    } else if (this.remuxTracks) {\n      // Return until we have enough tracks from the pipeline to remux (if we\n      // are remuxing audio and video into a single MP4)\n      return;\n    } else if (this.pendingTracks.length === 0) {\n      // In the case where we receive a flush without any data having been\n      // received we consider it an emitted track for the purposes of coalescing\n      // `done` events.\n      // We do this for the case where there is an audio and video track in the\n      // segment but no audio data. (seen in several playlists with alternate\n      // audio tracks and no audio present in the main TS segments.)\n      this.emittedTracks++;\n\n      if (this.emittedTracks >= this.numberOfTracks) {\n        this.trigger('done');\n        this.emittedTracks = 0;\n      }\n      return;\n    }\n  }\n\n  if (this.videoTrack) {\n    timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n    VIDEO_PROPERTIES.forEach(function(prop) {\n      event.info[prop] = this.videoTrack[prop];\n    }, this);\n  } else if (this.audioTrack) {\n    timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n    AUDIO_PROPERTIES.forEach(function(prop) {\n      event.info[prop] = this.audioTrack[prop];\n    }, this);\n  }\n\n  if (this.pendingTracks.length === 1) {\n    event.type = this.pendingTracks[0].type;\n  } else {\n    event.type = 'combined';\n  }\n\n  this.emittedTracks += this.pendingTracks.length;\n\n  initSegment = mp4.initSegment(this.pendingTracks);\n\n  // Create a new typed array to hold the init segment\n  event.initSegment = new Uint8Array(initSegment.byteLength);\n\n  // Create an init segment containing a moov\n  // and track definitions\n  event.initSegment.set(initSegment);\n\n  // Create a new typed array to hold the moof+mdats\n  event.data = new Uint8Array(this.pendingBytes);\n\n  // Append each moof+mdat (one per track) together\n  for (i = 0; i < this.pendingBoxes.length; i++) {\n    event.data.set(this.pendingBoxes[i], offset);\n    offset += this.pendingBoxes[i].byteLength;\n  }\n\n  // Translate caption PTS times into second offsets into the\n  // video timeline for the segment, and add track info\n  for (i = 0; i < this.pendingCaptions.length; i++) {\n    caption = this.pendingCaptions[i];\n    caption.startTime = (caption.startPts - timelineStartPts);\n    caption.startTime /= 90e3;\n    caption.endTime = (caption.endPts - timelineStartPts);\n    caption.endTime /= 90e3;\n    event.captionStreams[caption.stream] = true;\n    event.captions.push(caption);\n  }\n\n  // Translate ID3 frame PTS times into second offsets into the\n  // video timeline for the segment\n  for (i = 0; i < this.pendingMetadata.length; i++) {\n    id3 = this.pendingMetadata[i];\n    id3.cueTime = (id3.pts - timelineStartPts);\n    id3.cueTime /= 90e3;\n    event.metadata.push(id3);\n  }\n  // We add this to every single emitted segment even though we only need\n  // it for the first\n  event.metadata.dispatchType = this.metadataStream.dispatchType;\n\n  // Reset stream state\n  this.pendingTracks.length = 0;\n  this.videoTrack = null;\n  this.pendingBoxes.length = 0;\n  this.pendingCaptions.length = 0;\n  this.pendingBytes = 0;\n  this.pendingMetadata.length = 0;\n\n  // Emit the built segment\n  this.trigger('data', event);\n\n  // Only emit `done` if all tracks have been flushed and emitted\n  if (this.emittedTracks >= this.numberOfTracks) {\n    this.trigger('done');\n    this.emittedTracks = 0;\n  }\n};\n/**\n * A Stream that expects MP2T binary data as input and produces\n * corresponding media segments, suitable for use with Media Source\n * Extension (MSE) implementations that support the ISO BMFF byte\n * stream format, like Chrome.\n */\nTransmuxer = function(options) {\n  var\n    self = this,\n    hasFlushed = true,\n    videoTrack,\n    audioTrack;\n\n  Transmuxer.prototype.init.call(this);\n\n  options = options || {};\n  this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n  this.transmuxPipeline_ = {};\n\n  this.setupAacPipeline = function() {\n    var pipeline = {};\n    this.transmuxPipeline_ = pipeline;\n\n    pipeline.type = 'aac';\n    pipeline.metadataStream = new m2ts.MetadataStream();\n\n    // set up the parsing pipeline\n    pipeline.aacStream = new AacStream();\n    pipeline.audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');\n    pipeline.timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');\n    pipeline.adtsStream = new AdtsStream();\n    pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream);\n    pipeline.headOfPipeline = pipeline.aacStream;\n\n    pipeline.aacStream\n      .pipe(pipeline.audioTimestampRolloverStream)\n      .pipe(pipeline.adtsStream);\n    pipeline.aacStream\n      .pipe(pipeline.timedMetadataTimestampRolloverStream)\n      .pipe(pipeline.metadataStream)\n      .pipe(pipeline.coalesceStream);\n\n    pipeline.metadataStream.on('timestamp', function(frame) {\n      pipeline.aacStream.setTimestamp(frame.timeStamp);\n    });\n\n    pipeline.aacStream.on('data', function(data) {\n      if (data.type === 'timed-metadata' && !pipeline.audioSegmentStream) {\n        audioTrack = audioTrack || {\n          timelineStartInfo: {\n            baseMediaDecodeTime: self.baseMediaDecodeTime\n          },\n          codec: 'adts',\n          type: 'audio'\n        };\n        // hook up the audio segment stream to the first track with aac data\n        pipeline.coalesceStream.numberOfTracks++;\n        pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack);\n        // Set up the final part of the audio pipeline\n        pipeline.adtsStream\n          .pipe(pipeline.audioSegmentStream)\n          .pipe(pipeline.coalesceStream);\n      }\n    });\n\n    // Re-emit any data coming from the coalesce stream to the outside world\n    pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n    // Let the consumer know we have finished flushing the entire pipeline\n    pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n  };\n\n  this.setupTsPipeline = function() {\n    var pipeline = {};\n    this.transmuxPipeline_ = pipeline;\n\n    pipeline.type = 'ts';\n    pipeline.metadataStream = new m2ts.MetadataStream();\n\n    // set up the parsing pipeline\n    pipeline.packetStream = new m2ts.TransportPacketStream();\n    pipeline.parseStream = new m2ts.TransportParseStream();\n    pipeline.elementaryStream = new m2ts.ElementaryStream();\n    pipeline.videoTimestampRolloverStream = new m2ts.TimestampRolloverStream('video');\n    pipeline.audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');\n    pipeline.timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');\n    pipeline.adtsStream = new AdtsStream();\n    pipeline.h264Stream = new H264Stream();\n    pipeline.captionStream = new m2ts.CaptionStream();\n    pipeline.coalesceStream = new CoalesceStream(options, pipeline.metadataStream);\n    pipeline.headOfPipeline = pipeline.packetStream;\n\n    // disassemble MPEG2-TS packets into elementary streams\n    pipeline.packetStream\n      .pipe(pipeline.parseStream)\n      .pipe(pipeline.elementaryStream);\n\n    // !!THIS ORDER IS IMPORTANT!!\n    // demux the streams\n    pipeline.elementaryStream\n      .pipe(pipeline.videoTimestampRolloverStream)\n      .pipe(pipeline.h264Stream);\n    pipeline.elementaryStream\n      .pipe(pipeline.audioTimestampRolloverStream)\n      .pipe(pipeline.adtsStream);\n\n    pipeline.elementaryStream\n      .pipe(pipeline.timedMetadataTimestampRolloverStream)\n      .pipe(pipeline.metadataStream)\n      .pipe(pipeline.coalesceStream);\n\n    // Hook up CEA-608/708 caption stream\n    pipeline.h264Stream.pipe(pipeline.captionStream)\n      .pipe(pipeline.coalesceStream);\n\n    pipeline.elementaryStream.on('data', function(data) {\n      var i;\n\n      if (data.type === 'metadata') {\n        i = data.tracks.length;\n\n        // scan the tracks listed in the metadata\n        while (i--) {\n          if (!videoTrack && data.tracks[i].type === 'video') {\n            videoTrack = data.tracks[i];\n            videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n          } else if (!audioTrack && data.tracks[i].type === 'audio') {\n            audioTrack = data.tracks[i];\n            audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n          }\n        }\n\n        // hook up the video segment stream to the first track with h264 data\n        if (videoTrack && !pipeline.videoSegmentStream) {\n          pipeline.coalesceStream.numberOfTracks++;\n          pipeline.videoSegmentStream = new VideoSegmentStream(videoTrack, options);\n\n          pipeline.videoSegmentStream.on('timelineStartInfo', function(timelineStartInfo) {\n          // When video emits timelineStartInfo data after a flush, we forward that\n          // info to the AudioSegmentStream, if it exists, because video timeline\n          // data takes precedence.\n            if (audioTrack) {\n              audioTrack.timelineStartInfo = timelineStartInfo;\n              // On the first segment we trim AAC frames that exist before the\n              // very earliest DTS we have seen in video because Chrome will\n              // interpret any video track with a baseMediaDecodeTime that is\n              // non-zero as a gap.\n              pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts);\n            }\n          });\n\n          pipeline.videoSegmentStream.on('processedGopsInfo',\n            self.trigger.bind(self, 'gopInfo'));\n\n          pipeline.videoSegmentStream.on('baseMediaDecodeTime', function(baseMediaDecodeTime) {\n            if (audioTrack) {\n              pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n            }\n          });\n\n          // Set up the final part of the video pipeline\n          pipeline.h264Stream\n            .pipe(pipeline.videoSegmentStream)\n            .pipe(pipeline.coalesceStream);\n        }\n\n        if (audioTrack && !pipeline.audioSegmentStream) {\n          // hook up the audio segment stream to the first track with aac data\n          pipeline.coalesceStream.numberOfTracks++;\n          pipeline.audioSegmentStream = new AudioSegmentStream(audioTrack);\n\n          // Set up the final part of the audio pipeline\n          pipeline.adtsStream\n            .pipe(pipeline.audioSegmentStream)\n            .pipe(pipeline.coalesceStream);\n        }\n      }\n    });\n\n    // Re-emit any data coming from the coalesce stream to the outside world\n    pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n    // Let the consumer know we have finished flushing the entire pipeline\n    pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n  };\n\n  // hook up the segment streams once track metadata is delivered\n  this.setBaseMediaDecodeTime = function(baseMediaDecodeTime) {\n    var pipeline = this.transmuxPipeline_;\n\n    this.baseMediaDecodeTime = baseMediaDecodeTime;\n    if (audioTrack) {\n      audioTrack.timelineStartInfo.dts = undefined;\n      audioTrack.timelineStartInfo.pts = undefined;\n      clearDtsInfo(audioTrack);\n      audioTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime;\n      if (pipeline.audioTimestampRolloverStream) {\n        pipeline.audioTimestampRolloverStream.discontinuity();\n      }\n    }\n    if (videoTrack) {\n      if (pipeline.videoSegmentStream) {\n        pipeline.videoSegmentStream.gopCache_ = [];\n        pipeline.videoTimestampRolloverStream.discontinuity();\n      }\n      videoTrack.timelineStartInfo.dts = undefined;\n      videoTrack.timelineStartInfo.pts = undefined;\n      clearDtsInfo(videoTrack);\n      pipeline.captionStream.reset();\n      videoTrack.timelineStartInfo.baseMediaDecodeTime = baseMediaDecodeTime;\n    }\n\n    if (pipeline.timedMetadataTimestampRolloverStream) {\n      pipeline.timedMetadataTimestampRolloverStream.discontinuity();\n    }\n  };\n\n  this.setAudioAppendStart = function(timestamp) {\n    if (audioTrack) {\n      this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n    }\n  };\n\n  this.alignGopsWith = function(gopsToAlignWith) {\n    if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n      this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n    }\n  };\n\n  // feed incoming data to the front of the parsing pipeline\n  this.push = function(data) {\n    if (hasFlushed) {\n      var isAac = isLikelyAacData(data);\n\n      if (isAac && this.transmuxPipeline_.type !== 'aac') {\n        this.setupAacPipeline();\n      } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n        this.setupTsPipeline();\n      }\n      hasFlushed = false;\n    }\n    this.transmuxPipeline_.headOfPipeline.push(data);\n  };\n\n  // flush any buffered data\n  this.flush = function() {\n      hasFlushed = true;\n    // Start at the top of the pipeline and flush all pending work\n    this.transmuxPipeline_.headOfPipeline.flush();\n  };\n\n  // Caption data has to be reset when seeking outside buffered range\n  this.resetCaptions = function() {\n    if (this.transmuxPipeline_.captionStream) {\n      this.transmuxPipeline_.captionStream.reset();\n    }\n  };\n\n};\nTransmuxer.prototype = new Stream();\n\nmodule.exports = {\n  Transmuxer: Transmuxer,\n  VideoSegmentStream: VideoSegmentStream,\n  AudioSegmentStream: AudioSegmentStream,\n  AUDIO_PROPERTIES: AUDIO_PROPERTIES,\n  VIDEO_PROPERTIES: VIDEO_PROPERTIES\n};\n","module.exports = require('./lib/_stream_writable.js');\n","var global = require('../internals/global');\nvar fails = require('../internals/fails');\nvar bind = require('../internals/function-bind-context');\nvar html = require('../internals/html');\nvar createElement = require('../internals/document-create-element');\nvar IS_IOS = require('../internals/engine-is-ios');\nvar IS_NODE = require('../internals/engine-is-node');\n\nvar location = global.location;\nvar set = global.setImmediate;\nvar clear = global.clearImmediate;\nvar process = global.process;\nvar MessageChannel = global.MessageChannel;\nvar Dispatch = global.Dispatch;\nvar counter = 0;\nvar queue = {};\nvar ONREADYSTATECHANGE = 'onreadystatechange';\nvar defer, channel, port;\n\nvar run = function (id) {\n  // eslint-disable-next-line no-prototype-builtins -- safe\n  if (queue.hasOwnProperty(id)) {\n    var fn = queue[id];\n    delete queue[id];\n    fn();\n  }\n};\n\nvar runner = function (id) {\n  return function () {\n    run(id);\n  };\n};\n\nvar listener = function (event) {\n  run(event.data);\n};\n\nvar post = function (id) {\n  // old engines have not location.origin\n  global.postMessage(id + '', location.protocol + '//' + location.host);\n};\n\n// Node.js 0.9+ & IE10+ has setImmediate, otherwise:\nif (!set || !clear) {\n  set = function setImmediate(fn) {\n    var args = [];\n    var i = 1;\n    while (arguments.length > i) args.push(arguments[i++]);\n    queue[++counter] = function () {\n      // eslint-disable-next-line no-new-func -- spec requirement\n      (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);\n    };\n    defer(counter);\n    return counter;\n  };\n  clear = function clearImmediate(id) {\n    delete queue[id];\n  };\n  // Node.js 0.8-\n  if (IS_NODE) {\n    defer = function (id) {\n      process.nextTick(runner(id));\n    };\n  // Sphere (JS game engine) Dispatch API\n  } else if (Dispatch && Dispatch.now) {\n    defer = function (id) {\n      Dispatch.now(runner(id));\n    };\n  // Browsers with MessageChannel, includes WebWorkers\n  // except iOS - https://github.com/zloirock/core-js/issues/624\n  } else if (MessageChannel && !IS_IOS) {\n    channel = new MessageChannel();\n    port = channel.port2;\n    channel.port1.onmessage = listener;\n    defer = bind(port.postMessage, port, 1);\n  // Browsers with postMessage, skip WebWorkers\n  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'\n  } else if (\n    global.addEventListener &&\n    typeof postMessage == 'function' &&\n    !global.importScripts &&\n    location && location.protocol !== 'file:' &&\n    !fails(post)\n  ) {\n    defer = post;\n    global.addEventListener('message', listener, false);\n  // IE8-\n  } else if (ONREADYSTATECHANGE in createElement('script')) {\n    defer = function (id) {\n      html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {\n        html.removeChild(this);\n        run(id);\n      };\n    };\n  // Rest old browsers\n  } else {\n    defer = function (id) {\n      setTimeout(runner(id), 0);\n    };\n  }\n}\n\nmodule.exports = {\n  set: set,\n  clear: clear\n};\n","var global = require('../internals/global');\nvar userAgent = require('../internals/engine-user-agent');\n\nvar process = global.process;\nvar versions = process && process.versions;\nvar v8 = versions && versions.v8;\nvar match, version;\n\nif (v8) {\n  match = v8.split('.');\n  version = match[0] + match[1];\n} else if (userAgent) {\n  match = userAgent.match(/Edge\\/(\\d+)/);\n  if (!match || match[1] >= 74) {\n    match = userAgent.match(/Chrome\\/(\\d+)/);\n    if (match) version = match[1];\n  }\n}\n\nmodule.exports = version && +version;\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar scrollSetting = {\n  \"\": true,\n  \"up\": true\n};\n\nfunction findScrollSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var scroll = scrollSetting[value.toLowerCase()];\n  return scroll ? value.toLowerCase() : false;\n}\n\nfunction isValidPercentValue(value) {\n  return typeof value === \"number\" && (value >= 0 && value <= 100);\n}\n\n// VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\nfunction VTTRegion() {\n  var _width = 100;\n  var _lines = 3;\n  var _regionAnchorX = 0;\n  var _regionAnchorY = 100;\n  var _viewportAnchorX = 0;\n  var _viewportAnchorY = 100;\n  var _scroll = \"\";\n\n  Object.defineProperties(this, {\n    \"width\": {\n      enumerable: true,\n      get: function() {\n        return _width;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"Width must be between 0 and 100.\");\n        }\n        _width = value;\n      }\n    },\n    \"lines\": {\n      enumerable: true,\n      get: function() {\n        return _lines;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Lines must be set to a number.\");\n        }\n        _lines = value;\n      }\n    },\n    \"regionAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n        }\n        _regionAnchorY = value;\n      }\n    },\n    \"regionAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorX;\n      },\n      set: function(value) {\n        if(!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n        }\n        _regionAnchorX = value;\n      }\n    },\n    \"viewportAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n        }\n        _viewportAnchorY = value;\n      }\n    },\n    \"viewportAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorX;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n        }\n        _viewportAnchorX = value;\n      }\n    },\n    \"scroll\": {\n      enumerable: true,\n      get: function() {\n        return _scroll;\n      },\n      set: function(value) {\n        var setting = findScrollSetting(value);\n        // Have to check for false as an empty string is a legal value.\n        if (setting === false) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _scroll = setting;\n      }\n    }\n  });\n}\n\nmodule.exports = VTTRegion;\n","var highPrefix = [33, 16, 5, 32, 164, 27];\nvar lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\nvar zeroFill = function(count) {\n  var a = [];\n  while (count--) {\n    a.push(0);\n  }\n  return a;\n};\n\nvar makeTable = function(metaTable) {\n  return Object.keys(metaTable).reduce(function(obj, key) {\n    obj[key] = new Uint8Array(metaTable[key].reduce(function(arr, part) {\n      return arr.concat(part);\n    }, []));\n    return obj;\n  }, {});\n};\n\n// Frames-of-silence to use for filling in missing AAC frames\nvar coneOfSilence = {\n  96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n  88200: [highPrefix, [231], zeroFill(170), [56]],\n  64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n  48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n  44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n  32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n  24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n  16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n  12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n  11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n  8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n};\n\nmodule.exports = makeTable(coneOfSilence);\n","import { toUint8, bytesMatch } from './byte-helpers.js';\nvar ID3 = toUint8([0x49, 0x44, 0x33]);\nexport var getId3Size = function getId3Size(bytes, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  bytes = toUint8(bytes);\n  var flags = bytes[offset + 5];\n  var returnSize = bytes[offset + 6] << 21 | bytes[offset + 7] << 14 | bytes[offset + 8] << 7 | bytes[offset + 9];\n  var footerPresent = (flags & 16) >> 4;\n\n  if (footerPresent) {\n    return returnSize + 20;\n  }\n\n  return returnSize + 10;\n};\nexport var getId3Offset = function getId3Offset(bytes, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  bytes = toUint8(bytes);\n\n  if (bytes.length - offset < 10 || !bytesMatch(bytes, ID3, {\n    offset: offset\n  })) {\n    return offset;\n  }\n\n  offset += getId3Size(bytes, offset); // recursive check for id3 tags as some files\n  // have multiple ID3 tag sections even though\n  // they should not.\n\n  return getId3Offset(bytes, offset);\n};",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function (undefined) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var Base = C_lib.Base;\n\t    var X32WordArray = C_lib.WordArray;\n\n\t    /**\n\t     * x64 namespace.\n\t     */\n\t    var C_x64 = C.x64 = {};\n\n\t    /**\n\t     * A 64-bit word.\n\t     */\n\t    var X64Word = C_x64.Word = Base.extend({\n\t        /**\n\t         * Initializes a newly created 64-bit word.\n\t         *\n\t         * @param {number} high The high 32 bits.\n\t         * @param {number} low The low 32 bits.\n\t         *\n\t         * @example\n\t         *\n\t         *     var x64Word = CryptoJS.x64.Word.create(0x00010203, 0x04050607);\n\t         */\n\t        init: function (high, low) {\n\t            this.high = high;\n\t            this.low = low;\n\t        }\n\n\t        /**\n\t         * Bitwise NOTs this word.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after negating.\n\t         *\n\t         * @example\n\t         *\n\t         *     var negated = x64Word.not();\n\t         */\n\t        // not: function () {\n\t            // var high = ~this.high;\n\t            // var low = ~this.low;\n\n\t            // return X64Word.create(high, low);\n\t        // },\n\n\t        /**\n\t         * Bitwise ANDs this word with the passed word.\n\t         *\n\t         * @param {X64Word} word The x64-Word to AND with this word.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after ANDing.\n\t         *\n\t         * @example\n\t         *\n\t         *     var anded = x64Word.and(anotherX64Word);\n\t         */\n\t        // and: function (word) {\n\t            // var high = this.high & word.high;\n\t            // var low = this.low & word.low;\n\n\t            // return X64Word.create(high, low);\n\t        // },\n\n\t        /**\n\t         * Bitwise ORs this word with the passed word.\n\t         *\n\t         * @param {X64Word} word The x64-Word to OR with this word.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after ORing.\n\t         *\n\t         * @example\n\t         *\n\t         *     var ored = x64Word.or(anotherX64Word);\n\t         */\n\t        // or: function (word) {\n\t            // var high = this.high | word.high;\n\t            // var low = this.low | word.low;\n\n\t            // return X64Word.create(high, low);\n\t        // },\n\n\t        /**\n\t         * Bitwise XORs this word with the passed word.\n\t         *\n\t         * @param {X64Word} word The x64-Word to XOR with this word.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after XORing.\n\t         *\n\t         * @example\n\t         *\n\t         *     var xored = x64Word.xor(anotherX64Word);\n\t         */\n\t        // xor: function (word) {\n\t            // var high = this.high ^ word.high;\n\t            // var low = this.low ^ word.low;\n\n\t            // return X64Word.create(high, low);\n\t        // },\n\n\t        /**\n\t         * Shifts this word n bits to the left.\n\t         *\n\t         * @param {number} n The number of bits to shift.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after shifting.\n\t         *\n\t         * @example\n\t         *\n\t         *     var shifted = x64Word.shiftL(25);\n\t         */\n\t        // shiftL: function (n) {\n\t            // if (n < 32) {\n\t                // var high = (this.high << n) | (this.low >>> (32 - n));\n\t                // var low = this.low << n;\n\t            // } else {\n\t                // var high = this.low << (n - 32);\n\t                // var low = 0;\n\t            // }\n\n\t            // return X64Word.create(high, low);\n\t        // },\n\n\t        /**\n\t         * Shifts this word n bits to the right.\n\t         *\n\t         * @param {number} n The number of bits to shift.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after shifting.\n\t         *\n\t         * @example\n\t         *\n\t         *     var shifted = x64Word.shiftR(7);\n\t         */\n\t        // shiftR: function (n) {\n\t            // if (n < 32) {\n\t                // var low = (this.low >>> n) | (this.high << (32 - n));\n\t                // var high = this.high >>> n;\n\t            // } else {\n\t                // var low = this.high >>> (n - 32);\n\t                // var high = 0;\n\t            // }\n\n\t            // return X64Word.create(high, low);\n\t        // },\n\n\t        /**\n\t         * Rotates this word n bits to the left.\n\t         *\n\t         * @param {number} n The number of bits to rotate.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after rotating.\n\t         *\n\t         * @example\n\t         *\n\t         *     var rotated = x64Word.rotL(25);\n\t         */\n\t        // rotL: function (n) {\n\t            // return this.shiftL(n).or(this.shiftR(64 - n));\n\t        // },\n\n\t        /**\n\t         * Rotates this word n bits to the right.\n\t         *\n\t         * @param {number} n The number of bits to rotate.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after rotating.\n\t         *\n\t         * @example\n\t         *\n\t         *     var rotated = x64Word.rotR(7);\n\t         */\n\t        // rotR: function (n) {\n\t            // return this.shiftR(n).or(this.shiftL(64 - n));\n\t        // },\n\n\t        /**\n\t         * Adds this word with the passed word.\n\t         *\n\t         * @param {X64Word} word The x64-Word to add with this word.\n\t         *\n\t         * @return {X64Word} A new x64-Word object after adding.\n\t         *\n\t         * @example\n\t         *\n\t         *     var added = x64Word.add(anotherX64Word);\n\t         */\n\t        // add: function (word) {\n\t            // var low = (this.low + word.low) | 0;\n\t            // var carry = (low >>> 0) < (this.low >>> 0) ? 1 : 0;\n\t            // var high = (this.high + word.high + carry) | 0;\n\n\t            // return X64Word.create(high, low);\n\t        // }\n\t    });\n\n\t    /**\n\t     * An array of 64-bit words.\n\t     *\n\t     * @property {Array} words The array of CryptoJS.x64.Word objects.\n\t     * @property {number} sigBytes The number of significant bytes in this word array.\n\t     */\n\t    var X64WordArray = C_x64.WordArray = Base.extend({\n\t        /**\n\t         * Initializes a newly created word array.\n\t         *\n\t         * @param {Array} words (Optional) An array of CryptoJS.x64.Word objects.\n\t         * @param {number} sigBytes (Optional) The number of significant bytes in the words.\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.x64.WordArray.create();\n\t         *\n\t         *     var wordArray = CryptoJS.x64.WordArray.create([\n\t         *         CryptoJS.x64.Word.create(0x00010203, 0x04050607),\n\t         *         CryptoJS.x64.Word.create(0x18191a1b, 0x1c1d1e1f)\n\t         *     ]);\n\t         *\n\t         *     var wordArray = CryptoJS.x64.WordArray.create([\n\t         *         CryptoJS.x64.Word.create(0x00010203, 0x04050607),\n\t         *         CryptoJS.x64.Word.create(0x18191a1b, 0x1c1d1e1f)\n\t         *     ], 10);\n\t         */\n\t        init: function (words, sigBytes) {\n\t            words = this.words = words || [];\n\n\t            if (sigBytes != undefined) {\n\t                this.sigBytes = sigBytes;\n\t            } else {\n\t                this.sigBytes = words.length * 8;\n\t            }\n\t        },\n\n\t        /**\n\t         * Converts this 64-bit word array to a 32-bit word array.\n\t         *\n\t         * @return {CryptoJS.lib.WordArray} This word array's data as a 32-bit word array.\n\t         *\n\t         * @example\n\t         *\n\t         *     var x32WordArray = x64WordArray.toX32();\n\t         */\n\t        toX32: function () {\n\t            // Shortcuts\n\t            var x64Words = this.words;\n\t            var x64WordsLength = x64Words.length;\n\n\t            // Convert\n\t            var x32Words = [];\n\t            for (var i = 0; i < x64WordsLength; i++) {\n\t                var x64Word = x64Words[i];\n\t                x32Words.push(x64Word.high);\n\t                x32Words.push(x64Word.low);\n\t            }\n\n\t            return X32WordArray.create(x32Words, this.sigBytes);\n\t        },\n\n\t        /**\n\t         * Creates a copy of this word array.\n\t         *\n\t         * @return {X64WordArray} The clone.\n\t         *\n\t         * @example\n\t         *\n\t         *     var clone = x64WordArray.clone();\n\t         */\n\t        clone: function () {\n\t            var clone = Base.clone.call(this);\n\n\t            // Clone \"words\" array\n\t            var words = clone.words = this.words.slice(0);\n\n\t            // Clone each X64Word object\n\t            var wordsLength = words.length;\n\t            for (var i = 0; i < wordsLength; i++) {\n\t                words[i] = words[i].clone();\n\t            }\n\n\t            return clone;\n\t        }\n\t    });\n\t}());\n\n\n\treturn CryptoJS;\n\n}));","'use strict';\n\nvar utils = require('../utils');\nvar BN = require('bn.js');\nvar inherits = require('inherits');\nvar Base = require('./base');\n\nvar assert = utils.assert;\n\nfunction ShortCurve(conf) {\n  Base.call(this, 'short', conf);\n\n  this.a = new BN(conf.a, 16).toRed(this.red);\n  this.b = new BN(conf.b, 16).toRed(this.red);\n  this.tinv = this.two.redInvm();\n\n  this.zeroA = this.a.fromRed().cmpn(0) === 0;\n  this.threeA = this.a.fromRed().sub(this.p).cmpn(-3) === 0;\n\n  // If the curve is endomorphic, precalculate beta and lambda\n  this.endo = this._getEndomorphism(conf);\n  this._endoWnafT1 = new Array(4);\n  this._endoWnafT2 = new Array(4);\n}\ninherits(ShortCurve, Base);\nmodule.exports = ShortCurve;\n\nShortCurve.prototype._getEndomorphism = function _getEndomorphism(conf) {\n  // No efficient endomorphism\n  if (!this.zeroA || !this.g || !this.n || this.p.modn(3) !== 1)\n    return;\n\n  // Compute beta and lambda, that lambda * P = (beta * Px; Py)\n  var beta;\n  var lambda;\n  if (conf.beta) {\n    beta = new BN(conf.beta, 16).toRed(this.red);\n  } else {\n    var betas = this._getEndoRoots(this.p);\n    // Choose the smallest beta\n    beta = betas[0].cmp(betas[1]) < 0 ? betas[0] : betas[1];\n    beta = beta.toRed(this.red);\n  }\n  if (conf.lambda) {\n    lambda = new BN(conf.lambda, 16);\n  } else {\n    // Choose the lambda that is matching selected beta\n    var lambdas = this._getEndoRoots(this.n);\n    if (this.g.mul(lambdas[0]).x.cmp(this.g.x.redMul(beta)) === 0) {\n      lambda = lambdas[0];\n    } else {\n      lambda = lambdas[1];\n      assert(this.g.mul(lambda).x.cmp(this.g.x.redMul(beta)) === 0);\n    }\n  }\n\n  // Get basis vectors, used for balanced length-two representation\n  var basis;\n  if (conf.basis) {\n    basis = conf.basis.map(function(vec) {\n      return {\n        a: new BN(vec.a, 16),\n        b: new BN(vec.b, 16),\n      };\n    });\n  } else {\n    basis = this._getEndoBasis(lambda);\n  }\n\n  return {\n    beta: beta,\n    lambda: lambda,\n    basis: basis,\n  };\n};\n\nShortCurve.prototype._getEndoRoots = function _getEndoRoots(num) {\n  // Find roots of for x^2 + x + 1 in F\n  // Root = (-1 +- Sqrt(-3)) / 2\n  //\n  var red = num === this.p ? this.red : BN.mont(num);\n  var tinv = new BN(2).toRed(red).redInvm();\n  var ntinv = tinv.redNeg();\n\n  var s = new BN(3).toRed(red).redNeg().redSqrt().redMul(tinv);\n\n  var l1 = ntinv.redAdd(s).fromRed();\n  var l2 = ntinv.redSub(s).fromRed();\n  return [ l1, l2 ];\n};\n\nShortCurve.prototype._getEndoBasis = function _getEndoBasis(lambda) {\n  // aprxSqrt >= sqrt(this.n)\n  var aprxSqrt = this.n.ushrn(Math.floor(this.n.bitLength() / 2));\n\n  // 3.74\n  // Run EGCD, until r(L + 1) < aprxSqrt\n  var u = lambda;\n  var v = this.n.clone();\n  var x1 = new BN(1);\n  var y1 = new BN(0);\n  var x2 = new BN(0);\n  var y2 = new BN(1);\n\n  // NOTE: all vectors are roots of: a + b * lambda = 0 (mod n)\n  var a0;\n  var b0;\n  // First vector\n  var a1;\n  var b1;\n  // Second vector\n  var a2;\n  var b2;\n\n  var prevR;\n  var i = 0;\n  var r;\n  var x;\n  while (u.cmpn(0) !== 0) {\n    var q = v.div(u);\n    r = v.sub(q.mul(u));\n    x = x2.sub(q.mul(x1));\n    var y = y2.sub(q.mul(y1));\n\n    if (!a1 && r.cmp(aprxSqrt) < 0) {\n      a0 = prevR.neg();\n      b0 = x1;\n      a1 = r.neg();\n      b1 = x;\n    } else if (a1 && ++i === 2) {\n      break;\n    }\n    prevR = r;\n\n    v = u;\n    u = r;\n    x2 = x1;\n    x1 = x;\n    y2 = y1;\n    y1 = y;\n  }\n  a2 = r.neg();\n  b2 = x;\n\n  var len1 = a1.sqr().add(b1.sqr());\n  var len2 = a2.sqr().add(b2.sqr());\n  if (len2.cmp(len1) >= 0) {\n    a2 = a0;\n    b2 = b0;\n  }\n\n  // Normalize signs\n  if (a1.negative) {\n    a1 = a1.neg();\n    b1 = b1.neg();\n  }\n  if (a2.negative) {\n    a2 = a2.neg();\n    b2 = b2.neg();\n  }\n\n  return [\n    { a: a1, b: b1 },\n    { a: a2, b: b2 },\n  ];\n};\n\nShortCurve.prototype._endoSplit = function _endoSplit(k) {\n  var basis = this.endo.basis;\n  var v1 = basis[0];\n  var v2 = basis[1];\n\n  var c1 = v2.b.mul(k).divRound(this.n);\n  var c2 = v1.b.neg().mul(k).divRound(this.n);\n\n  var p1 = c1.mul(v1.a);\n  var p2 = c2.mul(v2.a);\n  var q1 = c1.mul(v1.b);\n  var q2 = c2.mul(v2.b);\n\n  // Calculate answer\n  var k1 = k.sub(p1).sub(p2);\n  var k2 = q1.add(q2).neg();\n  return { k1: k1, k2: k2 };\n};\n\nShortCurve.prototype.pointFromX = function pointFromX(x, odd) {\n  x = new BN(x, 16);\n  if (!x.red)\n    x = x.toRed(this.red);\n\n  var y2 = x.redSqr().redMul(x).redIAdd(x.redMul(this.a)).redIAdd(this.b);\n  var y = y2.redSqrt();\n  if (y.redSqr().redSub(y2).cmp(this.zero) !== 0)\n    throw new Error('invalid point');\n\n  // XXX Is there any way to tell if the number is odd without converting it\n  // to non-red form?\n  var isOdd = y.fromRed().isOdd();\n  if (odd && !isOdd || !odd && isOdd)\n    y = y.redNeg();\n\n  return this.point(x, y);\n};\n\nShortCurve.prototype.validate = function validate(point) {\n  if (point.inf)\n    return true;\n\n  var x = point.x;\n  var y = point.y;\n\n  var ax = this.a.redMul(x);\n  var rhs = x.redSqr().redMul(x).redIAdd(ax).redIAdd(this.b);\n  return y.redSqr().redISub(rhs).cmpn(0) === 0;\n};\n\nShortCurve.prototype._endoWnafMulAdd =\n    function _endoWnafMulAdd(points, coeffs, jacobianResult) {\n      var npoints = this._endoWnafT1;\n      var ncoeffs = this._endoWnafT2;\n      for (var i = 0; i < points.length; i++) {\n        var split = this._endoSplit(coeffs[i]);\n        var p = points[i];\n        var beta = p._getBeta();\n\n        if (split.k1.negative) {\n          split.k1.ineg();\n          p = p.neg(true);\n        }\n        if (split.k2.negative) {\n          split.k2.ineg();\n          beta = beta.neg(true);\n        }\n\n        npoints[i * 2] = p;\n        npoints[i * 2 + 1] = beta;\n        ncoeffs[i * 2] = split.k1;\n        ncoeffs[i * 2 + 1] = split.k2;\n      }\n      var res = this._wnafMulAdd(1, npoints, ncoeffs, i * 2, jacobianResult);\n\n      // Clean-up references to points and coefficients\n      for (var j = 0; j < i * 2; j++) {\n        npoints[j] = null;\n        ncoeffs[j] = null;\n      }\n      return res;\n    };\n\nfunction Point(curve, x, y, isRed) {\n  Base.BasePoint.call(this, curve, 'affine');\n  if (x === null && y === null) {\n    this.x = null;\n    this.y = null;\n    this.inf = true;\n  } else {\n    this.x = new BN(x, 16);\n    this.y = new BN(y, 16);\n    // Force redgomery representation when loading from JSON\n    if (isRed) {\n      this.x.forceRed(this.curve.red);\n      this.y.forceRed(this.curve.red);\n    }\n    if (!this.x.red)\n      this.x = this.x.toRed(this.curve.red);\n    if (!this.y.red)\n      this.y = this.y.toRed(this.curve.red);\n    this.inf = false;\n  }\n}\ninherits(Point, Base.BasePoint);\n\nShortCurve.prototype.point = function point(x, y, isRed) {\n  return new Point(this, x, y, isRed);\n};\n\nShortCurve.prototype.pointFromJSON = function pointFromJSON(obj, red) {\n  return Point.fromJSON(this, obj, red);\n};\n\nPoint.prototype._getBeta = function _getBeta() {\n  if (!this.curve.endo)\n    return;\n\n  var pre = this.precomputed;\n  if (pre && pre.beta)\n    return pre.beta;\n\n  var beta = this.curve.point(this.x.redMul(this.curve.endo.beta), this.y);\n  if (pre) {\n    var curve = this.curve;\n    var endoMul = function(p) {\n      return curve.point(p.x.redMul(curve.endo.beta), p.y);\n    };\n    pre.beta = beta;\n    beta.precomputed = {\n      beta: null,\n      naf: pre.naf && {\n        wnd: pre.naf.wnd,\n        points: pre.naf.points.map(endoMul),\n      },\n      doubles: pre.doubles && {\n        step: pre.doubles.step,\n        points: pre.doubles.points.map(endoMul),\n      },\n    };\n  }\n  return beta;\n};\n\nPoint.prototype.toJSON = function toJSON() {\n  if (!this.precomputed)\n    return [ this.x, this.y ];\n\n  return [ this.x, this.y, this.precomputed && {\n    doubles: this.precomputed.doubles && {\n      step: this.precomputed.doubles.step,\n      points: this.precomputed.doubles.points.slice(1),\n    },\n    naf: this.precomputed.naf && {\n      wnd: this.precomputed.naf.wnd,\n      points: this.precomputed.naf.points.slice(1),\n    },\n  } ];\n};\n\nPoint.fromJSON = function fromJSON(curve, obj, red) {\n  if (typeof obj === 'string')\n    obj = JSON.parse(obj);\n  var res = curve.point(obj[0], obj[1], red);\n  if (!obj[2])\n    return res;\n\n  function obj2point(obj) {\n    return curve.point(obj[0], obj[1], red);\n  }\n\n  var pre = obj[2];\n  res.precomputed = {\n    beta: null,\n    doubles: pre.doubles && {\n      step: pre.doubles.step,\n      points: [ res ].concat(pre.doubles.points.map(obj2point)),\n    },\n    naf: pre.naf && {\n      wnd: pre.naf.wnd,\n      points: [ res ].concat(pre.naf.points.map(obj2point)),\n    },\n  };\n  return res;\n};\n\nPoint.prototype.inspect = function inspect() {\n  if (this.isInfinity())\n    return '<EC Point Infinity>';\n  return '<EC Point x: ' + this.x.fromRed().toString(16, 2) +\n      ' y: ' + this.y.fromRed().toString(16, 2) + '>';\n};\n\nPoint.prototype.isInfinity = function isInfinity() {\n  return this.inf;\n};\n\nPoint.prototype.add = function add(p) {\n  // O + P = P\n  if (this.inf)\n    return p;\n\n  // P + O = P\n  if (p.inf)\n    return this;\n\n  // P + P = 2P\n  if (this.eq(p))\n    return this.dbl();\n\n  // P + (-P) = O\n  if (this.neg().eq(p))\n    return this.curve.point(null, null);\n\n  // P + Q = O\n  if (this.x.cmp(p.x) === 0)\n    return this.curve.point(null, null);\n\n  var c = this.y.redSub(p.y);\n  if (c.cmpn(0) !== 0)\n    c = c.redMul(this.x.redSub(p.x).redInvm());\n  var nx = c.redSqr().redISub(this.x).redISub(p.x);\n  var ny = c.redMul(this.x.redSub(nx)).redISub(this.y);\n  return this.curve.point(nx, ny);\n};\n\nPoint.prototype.dbl = function dbl() {\n  if (this.inf)\n    return this;\n\n  // 2P = O\n  var ys1 = this.y.redAdd(this.y);\n  if (ys1.cmpn(0) === 0)\n    return this.curve.point(null, null);\n\n  var a = this.curve.a;\n\n  var x2 = this.x.redSqr();\n  var dyinv = ys1.redInvm();\n  var c = x2.redAdd(x2).redIAdd(x2).redIAdd(a).redMul(dyinv);\n\n  var nx = c.redSqr().redISub(this.x.redAdd(this.x));\n  var ny = c.redMul(this.x.redSub(nx)).redISub(this.y);\n  return this.curve.point(nx, ny);\n};\n\nPoint.prototype.getX = function getX() {\n  return this.x.fromRed();\n};\n\nPoint.prototype.getY = function getY() {\n  return this.y.fromRed();\n};\n\nPoint.prototype.mul = function mul(k) {\n  k = new BN(k, 16);\n  if (this.isInfinity())\n    return this;\n  else if (this._hasDoubles(k))\n    return this.curve._fixedNafMul(this, k);\n  else if (this.curve.endo)\n    return this.curve._endoWnafMulAdd([ this ], [ k ]);\n  else\n    return this.curve._wnafMul(this, k);\n};\n\nPoint.prototype.mulAdd = function mulAdd(k1, p2, k2) {\n  var points = [ this, p2 ];\n  var coeffs = [ k1, k2 ];\n  if (this.curve.endo)\n    return this.curve._endoWnafMulAdd(points, coeffs);\n  else\n    return this.curve._wnafMulAdd(1, points, coeffs, 2);\n};\n\nPoint.prototype.jmulAdd = function jmulAdd(k1, p2, k2) {\n  var points = [ this, p2 ];\n  var coeffs = [ k1, k2 ];\n  if (this.curve.endo)\n    return this.curve._endoWnafMulAdd(points, coeffs, true);\n  else\n    return this.curve._wnafMulAdd(1, points, coeffs, 2, true);\n};\n\nPoint.prototype.eq = function eq(p) {\n  return this === p ||\n         this.inf === p.inf &&\n             (this.inf || this.x.cmp(p.x) === 0 && this.y.cmp(p.y) === 0);\n};\n\nPoint.prototype.neg = function neg(_precompute) {\n  if (this.inf)\n    return this;\n\n  var res = this.curve.point(this.x, this.y.redNeg());\n  if (_precompute && this.precomputed) {\n    var pre = this.precomputed;\n    var negate = function(p) {\n      return p.neg();\n    };\n    res.precomputed = {\n      naf: pre.naf && {\n        wnd: pre.naf.wnd,\n        points: pre.naf.points.map(negate),\n      },\n      doubles: pre.doubles && {\n        step: pre.doubles.step,\n        points: pre.doubles.points.map(negate),\n      },\n    };\n  }\n  return res;\n};\n\nPoint.prototype.toJ = function toJ() {\n  if (this.inf)\n    return this.curve.jpoint(null, null, null);\n\n  var res = this.curve.jpoint(this.x, this.y, this.curve.one);\n  return res;\n};\n\nfunction JPoint(curve, x, y, z) {\n  Base.BasePoint.call(this, curve, 'jacobian');\n  if (x === null && y === null && z === null) {\n    this.x = this.curve.one;\n    this.y = this.curve.one;\n    this.z = new BN(0);\n  } else {\n    this.x = new BN(x, 16);\n    this.y = new BN(y, 16);\n    this.z = new BN(z, 16);\n  }\n  if (!this.x.red)\n    this.x = this.x.toRed(this.curve.red);\n  if (!this.y.red)\n    this.y = this.y.toRed(this.curve.red);\n  if (!this.z.red)\n    this.z = this.z.toRed(this.curve.red);\n\n  this.zOne = this.z === this.curve.one;\n}\ninherits(JPoint, Base.BasePoint);\n\nShortCurve.prototype.jpoint = function jpoint(x, y, z) {\n  return new JPoint(this, x, y, z);\n};\n\nJPoint.prototype.toP = function toP() {\n  if (this.isInfinity())\n    return this.curve.point(null, null);\n\n  var zinv = this.z.redInvm();\n  var zinv2 = zinv.redSqr();\n  var ax = this.x.redMul(zinv2);\n  var ay = this.y.redMul(zinv2).redMul(zinv);\n\n  return this.curve.point(ax, ay);\n};\n\nJPoint.prototype.neg = function neg() {\n  return this.curve.jpoint(this.x, this.y.redNeg(), this.z);\n};\n\nJPoint.prototype.add = function add(p) {\n  // O + P = P\n  if (this.isInfinity())\n    return p;\n\n  // P + O = P\n  if (p.isInfinity())\n    return this;\n\n  // 12M + 4S + 7A\n  var pz2 = p.z.redSqr();\n  var z2 = this.z.redSqr();\n  var u1 = this.x.redMul(pz2);\n  var u2 = p.x.redMul(z2);\n  var s1 = this.y.redMul(pz2.redMul(p.z));\n  var s2 = p.y.redMul(z2.redMul(this.z));\n\n  var h = u1.redSub(u2);\n  var r = s1.redSub(s2);\n  if (h.cmpn(0) === 0) {\n    if (r.cmpn(0) !== 0)\n      return this.curve.jpoint(null, null, null);\n    else\n      return this.dbl();\n  }\n\n  var h2 = h.redSqr();\n  var h3 = h2.redMul(h);\n  var v = u1.redMul(h2);\n\n  var nx = r.redSqr().redIAdd(h3).redISub(v).redISub(v);\n  var ny = r.redMul(v.redISub(nx)).redISub(s1.redMul(h3));\n  var nz = this.z.redMul(p.z).redMul(h);\n\n  return this.curve.jpoint(nx, ny, nz);\n};\n\nJPoint.prototype.mixedAdd = function mixedAdd(p) {\n  // O + P = P\n  if (this.isInfinity())\n    return p.toJ();\n\n  // P + O = P\n  if (p.isInfinity())\n    return this;\n\n  // 8M + 3S + 7A\n  var z2 = this.z.redSqr();\n  var u1 = this.x;\n  var u2 = p.x.redMul(z2);\n  var s1 = this.y;\n  var s2 = p.y.redMul(z2).redMul(this.z);\n\n  var h = u1.redSub(u2);\n  var r = s1.redSub(s2);\n  if (h.cmpn(0) === 0) {\n    if (r.cmpn(0) !== 0)\n      return this.curve.jpoint(null, null, null);\n    else\n      return this.dbl();\n  }\n\n  var h2 = h.redSqr();\n  var h3 = h2.redMul(h);\n  var v = u1.redMul(h2);\n\n  var nx = r.redSqr().redIAdd(h3).redISub(v).redISub(v);\n  var ny = r.redMul(v.redISub(nx)).redISub(s1.redMul(h3));\n  var nz = this.z.redMul(h);\n\n  return this.curve.jpoint(nx, ny, nz);\n};\n\nJPoint.prototype.dblp = function dblp(pow) {\n  if (pow === 0)\n    return this;\n  if (this.isInfinity())\n    return this;\n  if (!pow)\n    return this.dbl();\n\n  var i;\n  if (this.curve.zeroA || this.curve.threeA) {\n    var r = this;\n    for (i = 0; i < pow; i++)\n      r = r.dbl();\n    return r;\n  }\n\n  // 1M + 2S + 1A + N * (4S + 5M + 8A)\n  // N = 1 => 6M + 6S + 9A\n  var a = this.curve.a;\n  var tinv = this.curve.tinv;\n\n  var jx = this.x;\n  var jy = this.y;\n  var jz = this.z;\n  var jz4 = jz.redSqr().redSqr();\n\n  // Reuse results\n  var jyd = jy.redAdd(jy);\n  for (i = 0; i < pow; i++) {\n    var jx2 = jx.redSqr();\n    var jyd2 = jyd.redSqr();\n    var jyd4 = jyd2.redSqr();\n    var c = jx2.redAdd(jx2).redIAdd(jx2).redIAdd(a.redMul(jz4));\n\n    var t1 = jx.redMul(jyd2);\n    var nx = c.redSqr().redISub(t1.redAdd(t1));\n    var t2 = t1.redISub(nx);\n    var dny = c.redMul(t2);\n    dny = dny.redIAdd(dny).redISub(jyd4);\n    var nz = jyd.redMul(jz);\n    if (i + 1 < pow)\n      jz4 = jz4.redMul(jyd4);\n\n    jx = nx;\n    jz = nz;\n    jyd = dny;\n  }\n\n  return this.curve.jpoint(jx, jyd.redMul(tinv), jz);\n};\n\nJPoint.prototype.dbl = function dbl() {\n  if (this.isInfinity())\n    return this;\n\n  if (this.curve.zeroA)\n    return this._zeroDbl();\n  else if (this.curve.threeA)\n    return this._threeDbl();\n  else\n    return this._dbl();\n};\n\nJPoint.prototype._zeroDbl = function _zeroDbl() {\n  var nx;\n  var ny;\n  var nz;\n  // Z = 1\n  if (this.zOne) {\n    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html\n    //     #doubling-mdbl-2007-bl\n    // 1M + 5S + 14A\n\n    // XX = X1^2\n    var xx = this.x.redSqr();\n    // YY = Y1^2\n    var yy = this.y.redSqr();\n    // YYYY = YY^2\n    var yyyy = yy.redSqr();\n    // S = 2 * ((X1 + YY)^2 - XX - YYYY)\n    var s = this.x.redAdd(yy).redSqr().redISub(xx).redISub(yyyy);\n    s = s.redIAdd(s);\n    // M = 3 * XX + a; a = 0\n    var m = xx.redAdd(xx).redIAdd(xx);\n    // T = M ^ 2 - 2*S\n    var t = m.redSqr().redISub(s).redISub(s);\n\n    // 8 * YYYY\n    var yyyy8 = yyyy.redIAdd(yyyy);\n    yyyy8 = yyyy8.redIAdd(yyyy8);\n    yyyy8 = yyyy8.redIAdd(yyyy8);\n\n    // X3 = T\n    nx = t;\n    // Y3 = M * (S - T) - 8 * YYYY\n    ny = m.redMul(s.redISub(t)).redISub(yyyy8);\n    // Z3 = 2*Y1\n    nz = this.y.redAdd(this.y);\n  } else {\n    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html\n    //     #doubling-dbl-2009-l\n    // 2M + 5S + 13A\n\n    // A = X1^2\n    var a = this.x.redSqr();\n    // B = Y1^2\n    var b = this.y.redSqr();\n    // C = B^2\n    var c = b.redSqr();\n    // D = 2 * ((X1 + B)^2 - A - C)\n    var d = this.x.redAdd(b).redSqr().redISub(a).redISub(c);\n    d = d.redIAdd(d);\n    // E = 3 * A\n    var e = a.redAdd(a).redIAdd(a);\n    // F = E^2\n    var f = e.redSqr();\n\n    // 8 * C\n    var c8 = c.redIAdd(c);\n    c8 = c8.redIAdd(c8);\n    c8 = c8.redIAdd(c8);\n\n    // X3 = F - 2 * D\n    nx = f.redISub(d).redISub(d);\n    // Y3 = E * (D - X3) - 8 * C\n    ny = e.redMul(d.redISub(nx)).redISub(c8);\n    // Z3 = 2 * Y1 * Z1\n    nz = this.y.redMul(this.z);\n    nz = nz.redIAdd(nz);\n  }\n\n  return this.curve.jpoint(nx, ny, nz);\n};\n\nJPoint.prototype._threeDbl = function _threeDbl() {\n  var nx;\n  var ny;\n  var nz;\n  // Z = 1\n  if (this.zOne) {\n    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html\n    //     #doubling-mdbl-2007-bl\n    // 1M + 5S + 15A\n\n    // XX = X1^2\n    var xx = this.x.redSqr();\n    // YY = Y1^2\n    var yy = this.y.redSqr();\n    // YYYY = YY^2\n    var yyyy = yy.redSqr();\n    // S = 2 * ((X1 + YY)^2 - XX - YYYY)\n    var s = this.x.redAdd(yy).redSqr().redISub(xx).redISub(yyyy);\n    s = s.redIAdd(s);\n    // M = 3 * XX + a\n    var m = xx.redAdd(xx).redIAdd(xx).redIAdd(this.curve.a);\n    // T = M^2 - 2 * S\n    var t = m.redSqr().redISub(s).redISub(s);\n    // X3 = T\n    nx = t;\n    // Y3 = M * (S - T) - 8 * YYYY\n    var yyyy8 = yyyy.redIAdd(yyyy);\n    yyyy8 = yyyy8.redIAdd(yyyy8);\n    yyyy8 = yyyy8.redIAdd(yyyy8);\n    ny = m.redMul(s.redISub(t)).redISub(yyyy8);\n    // Z3 = 2 * Y1\n    nz = this.y.redAdd(this.y);\n  } else {\n    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#doubling-dbl-2001-b\n    // 3M + 5S\n\n    // delta = Z1^2\n    var delta = this.z.redSqr();\n    // gamma = Y1^2\n    var gamma = this.y.redSqr();\n    // beta = X1 * gamma\n    var beta = this.x.redMul(gamma);\n    // alpha = 3 * (X1 - delta) * (X1 + delta)\n    var alpha = this.x.redSub(delta).redMul(this.x.redAdd(delta));\n    alpha = alpha.redAdd(alpha).redIAdd(alpha);\n    // X3 = alpha^2 - 8 * beta\n    var beta4 = beta.redIAdd(beta);\n    beta4 = beta4.redIAdd(beta4);\n    var beta8 = beta4.redAdd(beta4);\n    nx = alpha.redSqr().redISub(beta8);\n    // Z3 = (Y1 + Z1)^2 - gamma - delta\n    nz = this.y.redAdd(this.z).redSqr().redISub(gamma).redISub(delta);\n    // Y3 = alpha * (4 * beta - X3) - 8 * gamma^2\n    var ggamma8 = gamma.redSqr();\n    ggamma8 = ggamma8.redIAdd(ggamma8);\n    ggamma8 = ggamma8.redIAdd(ggamma8);\n    ggamma8 = ggamma8.redIAdd(ggamma8);\n    ny = alpha.redMul(beta4.redISub(nx)).redISub(ggamma8);\n  }\n\n  return this.curve.jpoint(nx, ny, nz);\n};\n\nJPoint.prototype._dbl = function _dbl() {\n  var a = this.curve.a;\n\n  // 4M + 6S + 10A\n  var jx = this.x;\n  var jy = this.y;\n  var jz = this.z;\n  var jz4 = jz.redSqr().redSqr();\n\n  var jx2 = jx.redSqr();\n  var jy2 = jy.redSqr();\n\n  var c = jx2.redAdd(jx2).redIAdd(jx2).redIAdd(a.redMul(jz4));\n\n  var jxd4 = jx.redAdd(jx);\n  jxd4 = jxd4.redIAdd(jxd4);\n  var t1 = jxd4.redMul(jy2);\n  var nx = c.redSqr().redISub(t1.redAdd(t1));\n  var t2 = t1.redISub(nx);\n\n  var jyd8 = jy2.redSqr();\n  jyd8 = jyd8.redIAdd(jyd8);\n  jyd8 = jyd8.redIAdd(jyd8);\n  jyd8 = jyd8.redIAdd(jyd8);\n  var ny = c.redMul(t2).redISub(jyd8);\n  var nz = jy.redAdd(jy).redMul(jz);\n\n  return this.curve.jpoint(nx, ny, nz);\n};\n\nJPoint.prototype.trpl = function trpl() {\n  if (!this.curve.zeroA)\n    return this.dbl().add(this);\n\n  // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html#tripling-tpl-2007-bl\n  // 5M + 10S + ...\n\n  // XX = X1^2\n  var xx = this.x.redSqr();\n  // YY = Y1^2\n  var yy = this.y.redSqr();\n  // ZZ = Z1^2\n  var zz = this.z.redSqr();\n  // YYYY = YY^2\n  var yyyy = yy.redSqr();\n  // M = 3 * XX + a * ZZ2; a = 0\n  var m = xx.redAdd(xx).redIAdd(xx);\n  // MM = M^2\n  var mm = m.redSqr();\n  // E = 6 * ((X1 + YY)^2 - XX - YYYY) - MM\n  var e = this.x.redAdd(yy).redSqr().redISub(xx).redISub(yyyy);\n  e = e.redIAdd(e);\n  e = e.redAdd(e).redIAdd(e);\n  e = e.redISub(mm);\n  // EE = E^2\n  var ee = e.redSqr();\n  // T = 16*YYYY\n  var t = yyyy.redIAdd(yyyy);\n  t = t.redIAdd(t);\n  t = t.redIAdd(t);\n  t = t.redIAdd(t);\n  // U = (M + E)^2 - MM - EE - T\n  var u = m.redIAdd(e).redSqr().redISub(mm).redISub(ee).redISub(t);\n  // X3 = 4 * (X1 * EE - 4 * YY * U)\n  var yyu4 = yy.redMul(u);\n  yyu4 = yyu4.redIAdd(yyu4);\n  yyu4 = yyu4.redIAdd(yyu4);\n  var nx = this.x.redMul(ee).redISub(yyu4);\n  nx = nx.redIAdd(nx);\n  nx = nx.redIAdd(nx);\n  // Y3 = 8 * Y1 * (U * (T - U) - E * EE)\n  var ny = this.y.redMul(u.redMul(t.redISub(u)).redISub(e.redMul(ee)));\n  ny = ny.redIAdd(ny);\n  ny = ny.redIAdd(ny);\n  ny = ny.redIAdd(ny);\n  // Z3 = (Z1 + E)^2 - ZZ - EE\n  var nz = this.z.redAdd(e).redSqr().redISub(zz).redISub(ee);\n\n  return this.curve.jpoint(nx, ny, nz);\n};\n\nJPoint.prototype.mul = function mul(k, kbase) {\n  k = new BN(k, kbase);\n\n  return this.curve._wnafMul(this, k);\n};\n\nJPoint.prototype.eq = function eq(p) {\n  if (p.type === 'affine')\n    return this.eq(p.toJ());\n\n  if (this === p)\n    return true;\n\n  // x1 * z2^2 == x2 * z1^2\n  var z2 = this.z.redSqr();\n  var pz2 = p.z.redSqr();\n  if (this.x.redMul(pz2).redISub(p.x.redMul(z2)).cmpn(0) !== 0)\n    return false;\n\n  // y1 * z2^3 == y2 * z1^3\n  var z3 = z2.redMul(this.z);\n  var pz3 = pz2.redMul(p.z);\n  return this.y.redMul(pz3).redISub(p.y.redMul(z3)).cmpn(0) === 0;\n};\n\nJPoint.prototype.eqXToP = function eqXToP(x) {\n  var zs = this.z.redSqr();\n  var rx = x.toRed(this.curve.red).redMul(zs);\n  if (this.x.cmp(rx) === 0)\n    return true;\n\n  var xc = x.clone();\n  var t = this.curve.redN.redMul(zs);\n  for (;;) {\n    xc.iadd(this.curve.n);\n    if (xc.cmp(this.curve.p) >= 0)\n      return false;\n\n    rx.redIAdd(t);\n    if (this.x.cmp(rx) === 0)\n      return true;\n  }\n};\n\nJPoint.prototype.inspect = function inspect() {\n  if (this.isInfinity())\n    return '<EC JPoint Infinity>';\n  return '<EC JPoint x: ' + this.x.toString(16, 2) +\n      ' y: ' + this.y.toString(16, 2) +\n      ' z: ' + this.z.toString(16, 2) + '>';\n};\n\nJPoint.prototype.isInfinity = function isInfinity() {\n  // XXX This code assumes that zero is always zero in red\n  return this.z.cmpn(0) === 0;\n};\n","'use strict';\n\nvar elliptic = exports;\n\nelliptic.version = require('../package.json').version;\nelliptic.utils = require('./elliptic/utils');\nelliptic.rand = require('brorand');\nelliptic.curve = require('./elliptic/curve');\nelliptic.curves = require('./elliptic/curves');\n\n// Protocols\nelliptic.ec = require('./elliptic/ec');\nelliptic.eddsa = require('./elliptic/eddsa');\n","exports = module.exports = require('./lib/_stream_readable.js');\nexports.Stream = exports;\nexports.Readable = exports;\nexports.Writable = require('./lib/_stream_writable.js');\nexports.Duplex = require('./lib/_stream_duplex.js');\nexports.Transform = require('./lib/_stream_transform.js');\nexports.PassThrough = require('./lib/_stream_passthrough.js');\nexports.finished = require('./lib/internal/streams/end-of-stream.js');\nexports.pipeline = require('./lib/internal/streams/pipeline.js');\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toObject = require('../internals/to-object');\nvar nativeGetPrototypeOf = require('../internals/object-get-prototype-of');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetPrototypeOf(1); });\n\n// `Object.getPrototypeOf` method\n// https://tc39.es/ecma262/#sec-object.getprototypeof\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !CORRECT_PROTOTYPE_GETTER }, {\n  getPrototypeOf: function getPrototypeOf(it) {\n    return nativeGetPrototypeOf(toObject(it));\n  }\n});\n\n","var getBuiltIn = require('../internals/get-built-in');\n\nmodule.exports = getBuiltIn('navigator', 'userAgent') || '';\n","'use strict';\n\nconst encoders = exports;\n\nencoders.der = require('./der');\nencoders.pem = require('./pem');\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./x64-core\"), require(\"./lib-typedarrays\"), require(\"./enc-utf16\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./sha1\"), require(\"./sha256\"), require(\"./sha224\"), require(\"./sha512\"), require(\"./sha384\"), require(\"./sha3\"), require(\"./ripemd160\"), require(\"./hmac\"), require(\"./pbkdf2\"), require(\"./evpkdf\"), require(\"./cipher-core\"), require(\"./mode-cfb\"), require(\"./mode-ctr\"), require(\"./mode-ctr-gladman\"), require(\"./mode-ofb\"), require(\"./mode-ecb\"), require(\"./pad-ansix923\"), require(\"./pad-iso10126\"), require(\"./pad-iso97971\"), require(\"./pad-zeropadding\"), require(\"./pad-nopadding\"), require(\"./format-hex\"), require(\"./aes\"), require(\"./tripledes\"), require(\"./rc4\"), require(\"./rabbit\"), require(\"./rabbit-legacy\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./x64-core\", \"./lib-typedarrays\", \"./enc-utf16\", \"./enc-base64\", \"./md5\", \"./sha1\", \"./sha256\", \"./sha224\", \"./sha512\", \"./sha384\", \"./sha3\", \"./ripemd160\", \"./hmac\", \"./pbkdf2\", \"./evpkdf\", \"./cipher-core\", \"./mode-cfb\", \"./mode-ctr\", \"./mode-ctr-gladman\", \"./mode-ofb\", \"./mode-ecb\", \"./pad-ansix923\", \"./pad-iso10126\", \"./pad-iso97971\", \"./pad-zeropadding\", \"./pad-nopadding\", \"./format-hex\", \"./aes\", \"./tripledes\", \"./rc4\", \"./rabbit\", \"./rabbit-legacy\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\troot.CryptoJS = factory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\treturn CryptoJS;\n\n}));","exports = module.exports = require('./lib/_stream_readable.js');\nexports.Stream = exports;\nexports.Readable = exports;\nexports.Writable = require('./lib/_stream_writable.js');\nexports.Duplex = require('./lib/_stream_duplex.js');\nexports.Transform = require('./lib/_stream_transform.js');\nexports.PassThrough = require('./lib/_stream_passthrough.js');\nexports.finished = require('./lib/internal/streams/end-of-stream.js');\nexports.pipeline = require('./lib/internal/streams/pipeline.js');\n","var Buffer = require('safe-buffer').Buffer\nvar xor = require('buffer-xor')\n\nfunction encryptStart (self, data, decrypt) {\n  var len = data.length\n  var out = xor(data, self._cache)\n  self._cache = self._cache.slice(len)\n  self._prev = Buffer.concat([self._prev, decrypt ? data : out])\n  return out\n}\n\nexports.encrypt = function (self, data, decrypt) {\n  var out = Buffer.allocUnsafe(0)\n  var len\n\n  while (data.length) {\n    if (self._cache.length === 0) {\n      self._cache = self._cipher.encryptBlock(self._prev)\n      self._prev = Buffer.allocUnsafe(0)\n    }\n\n    if (self._cache.length <= data.length) {\n      len = self._cache.length\n      out = Buffer.concat([out, encryptStart(self, data.slice(0, len), decrypt)])\n      data = data.slice(len)\n    } else {\n      out = Buffer.concat([out, encryptStart(self, data, decrypt)])\n      break\n    }\n  }\n\n  return out\n}\n","var classof = require('../internals/classof');\nvar Iterators = require('../internals/iterators');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\n\nmodule.exports = function (it) {\n  if (it != undefined) return it[ITERATOR]\n    || it['@@iterator']\n    || Iterators[classof(it)];\n};\n","export default function getFreshSideObject() {\n  return {\n    top: 0,\n    right: 0,\n    bottom: 0,\n    left: 0\n  };\n}","\"use strict\";\n\nvar window = require(\"global/window\");\n\nvar _extends = require(\"@babel/runtime/helpers/extends\");\n\nvar isFunction = require('is-function');\n\ncreateXHR.httpHandler = require('./http-handler.js');\n/**\n * @license\n * slighly modified parse-headers 2.0.2 <https://github.com/kesla/parse-headers/>\n * Copyright (c) 2014 David Björklund\n * Available under the MIT license\n * <https://github.com/kesla/parse-headers/blob/master/LICENCE>\n */\n\nvar parseHeaders = function parseHeaders(headers) {\n  var result = {};\n\n  if (!headers) {\n    return result;\n  }\n\n  headers.trim().split('\\n').forEach(function (row) {\n    var index = row.indexOf(':');\n    var key = row.slice(0, index).trim().toLowerCase();\n    var value = row.slice(index + 1).trim();\n\n    if (typeof result[key] === 'undefined') {\n      result[key] = value;\n    } else if (Array.isArray(result[key])) {\n      result[key].push(value);\n    } else {\n      result[key] = [result[key], value];\n    }\n  });\n  return result;\n};\n\nmodule.exports = createXHR; // Allow use of default import syntax in TypeScript\n\nmodule.exports.default = createXHR;\ncreateXHR.XMLHttpRequest = window.XMLHttpRequest || noop;\ncreateXHR.XDomainRequest = \"withCredentials\" in new createXHR.XMLHttpRequest() ? createXHR.XMLHttpRequest : window.XDomainRequest;\nforEachArray([\"get\", \"put\", \"post\", \"patch\", \"head\", \"delete\"], function (method) {\n  createXHR[method === \"delete\" ? \"del\" : method] = function (uri, options, callback) {\n    options = initParams(uri, options, callback);\n    options.method = method.toUpperCase();\n    return _createXHR(options);\n  };\n});\n\nfunction forEachArray(array, iterator) {\n  for (var i = 0; i < array.length; i++) {\n    iterator(array[i]);\n  }\n}\n\nfunction isEmpty(obj) {\n  for (var i in obj) {\n    if (obj.hasOwnProperty(i)) return false;\n  }\n\n  return true;\n}\n\nfunction initParams(uri, options, callback) {\n  var params = uri;\n\n  if (isFunction(options)) {\n    callback = options;\n\n    if (typeof uri === \"string\") {\n      params = {\n        uri: uri\n      };\n    }\n  } else {\n    params = _extends({}, options, {\n      uri: uri\n    });\n  }\n\n  params.callback = callback;\n  return params;\n}\n\nfunction createXHR(uri, options, callback) {\n  options = initParams(uri, options, callback);\n  return _createXHR(options);\n}\n\nfunction _createXHR(options) {\n  if (typeof options.callback === \"undefined\") {\n    throw new Error(\"callback argument missing\");\n  }\n\n  var called = false;\n\n  var callback = function cbOnce(err, response, body) {\n    if (!called) {\n      called = true;\n      options.callback(err, response, body);\n    }\n  };\n\n  function readystatechange() {\n    if (xhr.readyState === 4) {\n      setTimeout(loadFunc, 0);\n    }\n  }\n\n  function getBody() {\n    // Chrome with requestType=blob throws errors arround when even testing access to responseText\n    var body = undefined;\n\n    if (xhr.response) {\n      body = xhr.response;\n    } else {\n      body = xhr.responseText || getXml(xhr);\n    }\n\n    if (isJson) {\n      try {\n        body = JSON.parse(body);\n      } catch (e) {}\n    }\n\n    return body;\n  }\n\n  function errorFunc(evt) {\n    clearTimeout(timeoutTimer);\n\n    if (!(evt instanceof Error)) {\n      evt = new Error(\"\" + (evt || \"Unknown XMLHttpRequest Error\"));\n    }\n\n    evt.statusCode = 0;\n    return callback(evt, failureResponse);\n  } // will load the data & process the response in a special response object\n\n\n  function loadFunc() {\n    if (aborted) return;\n    var status;\n    clearTimeout(timeoutTimer);\n\n    if (options.useXDR && xhr.status === undefined) {\n      //IE8 CORS GET successful response doesn't have a status field, but body is fine\n      status = 200;\n    } else {\n      status = xhr.status === 1223 ? 204 : xhr.status;\n    }\n\n    var response = failureResponse;\n    var err = null;\n\n    if (status !== 0) {\n      response = {\n        body: getBody(),\n        statusCode: status,\n        method: method,\n        headers: {},\n        url: uri,\n        rawRequest: xhr\n      };\n\n      if (xhr.getAllResponseHeaders) {\n        //remember xhr can in fact be XDR for CORS in IE\n        response.headers = parseHeaders(xhr.getAllResponseHeaders());\n      }\n    } else {\n      err = new Error(\"Internal XMLHttpRequest Error\");\n    }\n\n    return callback(err, response, response.body);\n  }\n\n  var xhr = options.xhr || null;\n\n  if (!xhr) {\n    if (options.cors || options.useXDR) {\n      xhr = new createXHR.XDomainRequest();\n    } else {\n      xhr = new createXHR.XMLHttpRequest();\n    }\n  }\n\n  var key;\n  var aborted;\n  var uri = xhr.url = options.uri || options.url;\n  var method = xhr.method = options.method || \"GET\";\n  var body = options.body || options.data;\n  var headers = xhr.headers = options.headers || {};\n  var sync = !!options.sync;\n  var isJson = false;\n  var timeoutTimer;\n  var failureResponse = {\n    body: undefined,\n    headers: {},\n    statusCode: 0,\n    method: method,\n    url: uri,\n    rawRequest: xhr\n  };\n\n  if (\"json\" in options && options.json !== false) {\n    isJson = true;\n    headers[\"accept\"] || headers[\"Accept\"] || (headers[\"Accept\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n    if (method !== \"GET\" && method !== \"HEAD\") {\n      headers[\"content-type\"] || headers[\"Content-Type\"] || (headers[\"Content-Type\"] = \"application/json\"); //Don't override existing accept header declared by user\n\n      body = JSON.stringify(options.json === true ? body : options.json);\n    }\n  }\n\n  xhr.onreadystatechange = readystatechange;\n  xhr.onload = loadFunc;\n  xhr.onerror = errorFunc; // IE9 must have onprogress be set to a unique function.\n\n  xhr.onprogress = function () {// IE must die\n  };\n\n  xhr.onabort = function () {\n    aborted = true;\n  };\n\n  xhr.ontimeout = errorFunc;\n  xhr.open(method, uri, !sync, options.username, options.password); //has to be after open\n\n  if (!sync) {\n    xhr.withCredentials = !!options.withCredentials;\n  } // Cannot set timeout with sync request\n  // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly\n  // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent\n\n\n  if (!sync && options.timeout > 0) {\n    timeoutTimer = setTimeout(function () {\n      if (aborted) return;\n      aborted = true; //IE9 may still call readystatechange\n\n      xhr.abort(\"timeout\");\n      var e = new Error(\"XMLHttpRequest timeout\");\n      e.code = \"ETIMEDOUT\";\n      errorFunc(e);\n    }, options.timeout);\n  }\n\n  if (xhr.setRequestHeader) {\n    for (key in headers) {\n      if (headers.hasOwnProperty(key)) {\n        xhr.setRequestHeader(key, headers[key]);\n      }\n    }\n  } else if (options.headers && !isEmpty(options.headers)) {\n    throw new Error(\"Headers cannot be set on an XDomainRequest object\");\n  }\n\n  if (\"responseType\" in options) {\n    xhr.responseType = options.responseType;\n  }\n\n  if (\"beforeSend\" in options && typeof options.beforeSend === \"function\") {\n    options.beforeSend(xhr);\n  } // Microsoft Edge browser sends \"undefined\" when send is called with undefined value.\n  // XMLHttpRequest spec says to pass null as body to indicate no body\n  // See https://github.com/naugtur/xhr/issues/100.\n\n\n  xhr.send(body || null);\n  return xhr;\n}\n\nfunction getXml(xhr) {\n  // xhr.responseXML will throw Exception \"InvalidStateError\" or \"DOMException\"\n  // See https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseXML.\n  try {\n    if (xhr.responseType === \"document\") {\n      return xhr.responseXML;\n    }\n\n    var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === \"parsererror\";\n\n    if (xhr.responseType === \"\" && !firefoxBugTakenEffect) {\n      return xhr.responseXML;\n    }\n  } catch (e) {}\n\n  return null;\n}\n\nfunction noop() {}","/**\n * mux.js\n *\n * Copyright (c) Brightcove\n * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n */\nvar\n  ONE_SECOND_IN_TS = 90000, // 90kHz clock\n  secondsToVideoTs,\n  secondsToAudioTs,\n  videoTsToSeconds,\n  audioTsToSeconds,\n  audioTsToVideoTs,\n  videoTsToAudioTs,\n  metadataTsToSeconds;\n\nsecondsToVideoTs = function(seconds) {\n  return seconds * ONE_SECOND_IN_TS;\n};\n\nsecondsToAudioTs = function(seconds, sampleRate) {\n  return seconds * sampleRate;\n};\n\nvideoTsToSeconds = function(timestamp) {\n  return timestamp / ONE_SECOND_IN_TS;\n};\n\naudioTsToSeconds = function(timestamp, sampleRate) {\n  return timestamp / sampleRate;\n};\n\naudioTsToVideoTs = function(timestamp, sampleRate) {\n  return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n};\n\nvideoTsToAudioTs = function(timestamp, sampleRate) {\n  return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n};\n\n/**\n * Adjust ID3 tag or caption timing information by the timeline pts values\n * (if keepOriginalTimestamps is false) and convert to seconds\n */\nmetadataTsToSeconds = function(timestamp, timelineStartPts, keepOriginalTimestamps) {\n  return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n};\n\nmodule.exports = {\n  ONE_SECOND_IN_TS: ONE_SECOND_IN_TS,\n  secondsToVideoTs: secondsToVideoTs,\n  secondsToAudioTs: secondsToAudioTs,\n  videoTsToSeconds: videoTsToSeconds,\n  audioTsToSeconds: audioTsToSeconds,\n  audioTsToVideoTs: audioTsToVideoTs,\n  videoTsToAudioTs: videoTsToAudioTs,\n  metadataTsToSeconds: metadataTsToSeconds\n};\n","function _getPrototypeOf(o) {\n  module.exports = _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {\n    return o.__proto__ || Object.getPrototypeOf(o);\n  };\n  module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  return _getPrototypeOf(o);\n}\n\nmodule.exports = _getPrototypeOf;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","/**\n * mux.js\n *\n * Copyright (c) 2016 Brightcove\n * All rights reserved.\n *\n * Accepts program elementary stream (PES) data events and corrects\n * decode and presentation time stamps to account for a rollover\n * of the 33 bit value.\n */\n\n'use strict';\n\nvar Stream = require('../utils/stream');\n\nvar MAX_TS = 8589934592;\n\nvar RO_THRESH = 4294967296;\n\nvar handleRollover = function(value, reference) {\n  var direction = 1;\n\n  if (value > reference) {\n    // If the current timestamp value is greater than our reference timestamp and we detect a\n    // timestamp rollover, this means the roll over is happening in the opposite direction.\n    // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n    // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n    // rollover point. In loading this segment, the timestamp values will be very large,\n    // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n    // the time stamp to be `value - 2^33`.\n    direction = -1;\n  }\n\n  // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n  // cause an incorrect adjustment.\n  while (Math.abs(reference - value) > RO_THRESH) {\n    value += (direction * MAX_TS);\n  }\n\n  return value;\n};\n\nvar TimestampRolloverStream = function(type) {\n  var lastDTS, referenceDTS;\n\n  TimestampRolloverStream.prototype.init.call(this);\n\n  this.type_ = type;\n\n  this.push = function(data) {\n    if (data.type !== this.type_) {\n      return;\n    }\n\n    if (referenceDTS === undefined) {\n      referenceDTS = data.dts;\n    }\n\n    data.dts = handleRollover(data.dts, referenceDTS);\n    data.pts = handleRollover(data.pts, referenceDTS);\n\n    lastDTS = data.dts;\n\n    this.trigger('data', data);\n  };\n\n  this.flush = function() {\n    referenceDTS = lastDTS;\n    this.trigger('done');\n  };\n\n  this.discontinuity = function() {\n    referenceDTS = void 0;\n    lastDTS = void 0;\n  };\n\n};\n\nTimestampRolloverStream.prototype = new Stream();\n\nmodule.exports = {\n  TimestampRolloverStream: TimestampRolloverStream,\n  handleRollover: handleRollover\n};\n","'use strict';\n\nconst inherits = require('inherits');\nconst Buffer = require('safer-buffer').Buffer;\nconst Node = require('../base/node');\n\n// Import DER constants\nconst der = require('../constants/der');\n\nfunction DEREncoder(entity) {\n  this.enc = 'der';\n  this.name = entity.name;\n  this.entity = entity;\n\n  // Construct base tree\n  this.tree = new DERNode();\n  this.tree._init(entity.body);\n}\nmodule.exports = DEREncoder;\n\nDEREncoder.prototype.encode = function encode(data, reporter) {\n  return this.tree._encode(data, reporter).join();\n};\n\n// Tree methods\n\nfunction DERNode(parent) {\n  Node.call(this, 'der', parent);\n}\ninherits(DERNode, Node);\n\nDERNode.prototype._encodeComposite = function encodeComposite(tag,\n  primitive,\n  cls,\n  content) {\n  const encodedTag = encodeTag(tag, primitive, cls, this.reporter);\n\n  // Short form\n  if (content.length < 0x80) {\n    const header = Buffer.alloc(2);\n    header[0] = encodedTag;\n    header[1] = content.length;\n    return this._createEncoderBuffer([ header, content ]);\n  }\n\n  // Long form\n  // Count octets required to store length\n  let lenOctets = 1;\n  for (let i = content.length; i >= 0x100; i >>= 8)\n    lenOctets++;\n\n  const header = Buffer.alloc(1 + 1 + lenOctets);\n  header[0] = encodedTag;\n  header[1] = 0x80 | lenOctets;\n\n  for (let i = 1 + lenOctets, j = content.length; j > 0; i--, j >>= 8)\n    header[i] = j & 0xff;\n\n  return this._createEncoderBuffer([ header, content ]);\n};\n\nDERNode.prototype._encodeStr = function encodeStr(str, tag) {\n  if (tag === 'bitstr') {\n    return this._createEncoderBuffer([ str.unused | 0, str.data ]);\n  } else if (tag === 'bmpstr') {\n    const buf = Buffer.alloc(str.length * 2);\n    for (let i = 0; i < str.length; i++) {\n      buf.writeUInt16BE(str.charCodeAt(i), i * 2);\n    }\n    return this._createEncoderBuffer(buf);\n  } else if (tag === 'numstr') {\n    if (!this._isNumstr(str)) {\n      return this.reporter.error('Encoding of string type: numstr supports ' +\n                                 'only digits and space');\n    }\n    return this._createEncoderBuffer(str);\n  } else if (tag === 'printstr') {\n    if (!this._isPrintstr(str)) {\n      return this.reporter.error('Encoding of string type: printstr supports ' +\n                                 'only latin upper and lower case letters, ' +\n                                 'digits, space, apostrophe, left and rigth ' +\n                                 'parenthesis, plus sign, comma, hyphen, ' +\n                                 'dot, slash, colon, equal sign, ' +\n                                 'question mark');\n    }\n    return this._createEncoderBuffer(str);\n  } else if (/str$/.test(tag)) {\n    return this._createEncoderBuffer(str);\n  } else if (tag === 'objDesc') {\n    return this._createEncoderBuffer(str);\n  } else {\n    return this.reporter.error('Encoding of string type: ' + tag +\n                               ' unsupported');\n  }\n};\n\nDERNode.prototype._encodeObjid = function encodeObjid(id, values, relative) {\n  if (typeof id === 'string') {\n    if (!values)\n      return this.reporter.error('string objid given, but no values map found');\n    if (!values.hasOwnProperty(id))\n      return this.reporter.error('objid not found in values map');\n    id = values[id].split(/[\\s.]+/g);\n    for (let i = 0; i < id.length; i++)\n      id[i] |= 0;\n  } else if (Array.isArray(id)) {\n    id = id.slice();\n    for (let i = 0; i < id.length; i++)\n      id[i] |= 0;\n  }\n\n  if (!Array.isArray(id)) {\n    return this.reporter.error('objid() should be either array or string, ' +\n                               'got: ' + JSON.stringify(id));\n  }\n\n  if (!relative) {\n    if (id[1] >= 40)\n      return this.reporter.error('Second objid identifier OOB');\n    id.splice(0, 2, id[0] * 40 + id[1]);\n  }\n\n  // Count number of octets\n  let size = 0;\n  for (let i = 0; i < id.length; i++) {\n    let ident = id[i];\n    for (size++; ident >= 0x80; ident >>= 7)\n      size++;\n  }\n\n  const objid = Buffer.alloc(size);\n  let offset = objid.length - 1;\n  for (let i = id.length - 1; i >= 0; i--) {\n    let ident = id[i];\n    objid[offset--] = ident & 0x7f;\n    while ((ident >>= 7) > 0)\n      objid[offset--] = 0x80 | (ident & 0x7f);\n  }\n\n  return this._createEncoderBuffer(objid);\n};\n\nfunction two(num) {\n  if (num < 10)\n    return '0' + num;\n  else\n    return num;\n}\n\nDERNode.prototype._encodeTime = function encodeTime(time, tag) {\n  let str;\n  const date = new Date(time);\n\n  if (tag === 'gentime') {\n    str = [\n      two(date.getUTCFullYear()),\n      two(date.getUTCMonth() + 1),\n      two(date.getUTCDate()),\n      two(date.getUTCHours()),\n      two(date.getUTCMinutes()),\n      two(date.getUTCSeconds()),\n      'Z'\n    ].join('');\n  } else if (tag === 'utctime') {\n    str = [\n      two(date.getUTCFullYear() % 100),\n      two(date.getUTCMonth() + 1),\n      two(date.getUTCDate()),\n      two(date.getUTCHours()),\n      two(date.getUTCMinutes()),\n      two(date.getUTCSeconds()),\n      'Z'\n    ].join('');\n  } else {\n    this.reporter.error('Encoding ' + tag + ' time is not supported yet');\n  }\n\n  return this._encodeStr(str, 'octstr');\n};\n\nDERNode.prototype._encodeNull = function encodeNull() {\n  return this._createEncoderBuffer('');\n};\n\nDERNode.prototype._encodeInt = function encodeInt(num, values) {\n  if (typeof num === 'string') {\n    if (!values)\n      return this.reporter.error('String int or enum given, but no values map');\n    if (!values.hasOwnProperty(num)) {\n      return this.reporter.error('Values map doesn\\'t contain: ' +\n                                 JSON.stringify(num));\n    }\n    num = values[num];\n  }\n\n  // Bignum, assume big endian\n  if (typeof num !== 'number' && !Buffer.isBuffer(num)) {\n    const numArray = num.toArray();\n    if (!num.sign && numArray[0] & 0x80) {\n      numArray.unshift(0);\n    }\n    num = Buffer.from(numArray);\n  }\n\n  if (Buffer.isBuffer(num)) {\n    let size = num.length;\n    if (num.length === 0)\n      size++;\n\n    const out = Buffer.alloc(size);\n    num.copy(out);\n    if (num.length === 0)\n      out[0] = 0;\n    return this._createEncoderBuffer(out);\n  }\n\n  if (num < 0x80)\n    return this._createEncoderBuffer(num);\n\n  if (num < 0x100)\n    return this._createEncoderBuffer([0, num]);\n\n  let size = 1;\n  for (let i = num; i >= 0x100; i >>= 8)\n    size++;\n\n  const out = new Array(size);\n  for (let i = out.length - 1; i >= 0; i--) {\n    out[i] = num & 0xff;\n    num >>= 8;\n  }\n  if(out[0] & 0x80) {\n    out.unshift(0);\n  }\n\n  return this._createEncoderBuffer(Buffer.from(out));\n};\n\nDERNode.prototype._encodeBool = function encodeBool(value) {\n  return this._createEncoderBuffer(value ? 0xff : 0);\n};\n\nDERNode.prototype._use = function use(entity, obj) {\n  if (typeof entity === 'function')\n    entity = entity(obj);\n  return entity._getEncoder('der').tree;\n};\n\nDERNode.prototype._skipDefault = function skipDefault(dataBuffer, reporter, parent) {\n  const state = this._baseState;\n  let i;\n  if (state['default'] === null)\n    return false;\n\n  const data = dataBuffer.join();\n  if (state.defaultBuffer === undefined)\n    state.defaultBuffer = this._encodeValue(state['default'], reporter, parent).join();\n\n  if (data.length !== state.defaultBuffer.length)\n    return false;\n\n  for (i=0; i < data.length; i++)\n    if (data[i] !== state.defaultBuffer[i])\n      return false;\n\n  return true;\n};\n\n// Utility methods\n\nfunction encodeTag(tag, primitive, cls, reporter) {\n  let res;\n\n  if (tag === 'seqof')\n    tag = 'seq';\n  else if (tag === 'setof')\n    tag = 'set';\n\n  if (der.tagByName.hasOwnProperty(tag))\n    res = der.tagByName[tag];\n  else if (typeof tag === 'number' && (tag | 0) === tag)\n    res = tag;\n  else\n    return reporter.error('Unknown tag: ' + tag);\n\n  if (res >= 0x1f)\n    return reporter.error('Multi-octet tag encoding unsupported');\n\n  if (!primitive)\n    res |= 0x20;\n\n  res |= (der.tagClassByName[cls || 'universal'] << 6);\n\n  return res;\n}\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar anObject = require('../internals/an-object');\nvar objectKeys = require('../internals/object-keys');\n\n// `Object.defineProperties` method\n// https://tc39.es/ecma262/#sec-object.defineproperties\n// eslint-disable-next-line es/no-object-defineproperties -- safe\nmodule.exports = DESCRIPTORS ? Object.defineProperties : function defineProperties(O, Properties) {\n  anObject(O);\n  var keys = objectKeys(Properties);\n  var length = keys.length;\n  var index = 0;\n  var key;\n  while (length > index) definePropertyModule.f(O, key = keys[index++], Properties[key]);\n  return O;\n};\n","'use strict';\n\nvar utils = require('../utils');\nvar assert = utils.assert;\nvar parseBytes = utils.parseBytes;\nvar cachedProperty = utils.cachedProperty;\n\n/**\n* @param {EDDSA} eddsa - instance\n* @param {Object} params - public/private key parameters\n*\n* @param {Array<Byte>} [params.secret] - secret seed bytes\n* @param {Point} [params.pub] - public key point (aka `A` in eddsa terms)\n* @param {Array<Byte>} [params.pub] - public key point encoded as bytes\n*\n*/\nfunction KeyPair(eddsa, params) {\n  this.eddsa = eddsa;\n  this._secret = parseBytes(params.secret);\n  if (eddsa.isPoint(params.pub))\n    this._pub = params.pub;\n  else\n    this._pubBytes = parseBytes(params.pub);\n}\n\nKeyPair.fromPublic = function fromPublic(eddsa, pub) {\n  if (pub instanceof KeyPair)\n    return pub;\n  return new KeyPair(eddsa, { pub: pub });\n};\n\nKeyPair.fromSecret = function fromSecret(eddsa, secret) {\n  if (secret instanceof KeyPair)\n    return secret;\n  return new KeyPair(eddsa, { secret: secret });\n};\n\nKeyPair.prototype.secret = function secret() {\n  return this._secret;\n};\n\ncachedProperty(KeyPair, 'pubBytes', function pubBytes() {\n  return this.eddsa.encodePoint(this.pub());\n});\n\ncachedProperty(KeyPair, 'pub', function pub() {\n  if (this._pubBytes)\n    return this.eddsa.decodePoint(this._pubBytes);\n  return this.eddsa.g.mul(this.priv());\n});\n\ncachedProperty(KeyPair, 'privBytes', function privBytes() {\n  var eddsa = this.eddsa;\n  var hash = this.hash();\n  var lastIx = eddsa.encodingLength - 1;\n\n  var a = hash.slice(0, eddsa.encodingLength);\n  a[0] &= 248;\n  a[lastIx] &= 127;\n  a[lastIx] |= 64;\n\n  return a;\n});\n\ncachedProperty(KeyPair, 'priv', function priv() {\n  return this.eddsa.decodeInt(this.privBytes());\n});\n\ncachedProperty(KeyPair, 'hash', function hash() {\n  return this.eddsa.hash().update(this.secret()).digest();\n});\n\ncachedProperty(KeyPair, 'messagePrefix', function messagePrefix() {\n  return this.hash().slice(this.eddsa.encodingLength);\n});\n\nKeyPair.prototype.sign = function sign(message) {\n  assert(this._secret, 'KeyPair can only verify');\n  return this.eddsa.sign(message, this);\n};\n\nKeyPair.prototype.verify = function verify(message, sig) {\n  return this.eddsa.verify(message, sig, this);\n};\n\nKeyPair.prototype.getSecret = function getSecret(enc) {\n  assert(this._secret, 'KeyPair is public only');\n  return utils.encode(this.secret(), enc);\n};\n\nKeyPair.prototype.getPublic = function getPublic(enc) {\n  return utils.encode(this.pubBytes(), enc);\n};\n\nmodule.exports = KeyPair;\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./evpkdf\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./evpkdf\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * Cipher core components.\n\t */\n\tCryptoJS.lib.Cipher || (function (undefined) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var Base = C_lib.Base;\n\t    var WordArray = C_lib.WordArray;\n\t    var BufferedBlockAlgorithm = C_lib.BufferedBlockAlgorithm;\n\t    var C_enc = C.enc;\n\t    var Utf8 = C_enc.Utf8;\n\t    var Base64 = C_enc.Base64;\n\t    var C_algo = C.algo;\n\t    var EvpKDF = C_algo.EvpKDF;\n\n\t    /**\n\t     * Abstract base cipher template.\n\t     *\n\t     * @property {number} keySize This cipher's key size. Default: 4 (128 bits)\n\t     * @property {number} ivSize This cipher's IV size. Default: 4 (128 bits)\n\t     * @property {number} _ENC_XFORM_MODE A constant representing encryption mode.\n\t     * @property {number} _DEC_XFORM_MODE A constant representing decryption mode.\n\t     */\n\t    var Cipher = C_lib.Cipher = BufferedBlockAlgorithm.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {WordArray} iv The IV to use for this operation.\n\t         */\n\t        cfg: Base.extend(),\n\n\t        /**\n\t         * Creates this cipher in encryption mode.\n\t         *\n\t         * @param {WordArray} key The key.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @return {Cipher} A cipher instance.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var cipher = CryptoJS.algo.AES.createEncryptor(keyWordArray, { iv: ivWordArray });\n\t         */\n\t        createEncryptor: function (key, cfg) {\n\t            return this.create(this._ENC_XFORM_MODE, key, cfg);\n\t        },\n\n\t        /**\n\t         * Creates this cipher in decryption mode.\n\t         *\n\t         * @param {WordArray} key The key.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @return {Cipher} A cipher instance.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var cipher = CryptoJS.algo.AES.createDecryptor(keyWordArray, { iv: ivWordArray });\n\t         */\n\t        createDecryptor: function (key, cfg) {\n\t            return this.create(this._DEC_XFORM_MODE, key, cfg);\n\t        },\n\n\t        /**\n\t         * Initializes a newly created cipher.\n\t         *\n\t         * @param {number} xformMode Either the encryption or decryption transormation mode constant.\n\t         * @param {WordArray} key The key.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @example\n\t         *\n\t         *     var cipher = CryptoJS.algo.AES.create(CryptoJS.algo.AES._ENC_XFORM_MODE, keyWordArray, { iv: ivWordArray });\n\t         */\n\t        init: function (xformMode, key, cfg) {\n\t            // Apply config defaults\n\t            this.cfg = this.cfg.extend(cfg);\n\n\t            // Store transform mode and key\n\t            this._xformMode = xformMode;\n\t            this._key = key;\n\n\t            // Set initial values\n\t            this.reset();\n\t        },\n\n\t        /**\n\t         * Resets this cipher to its initial state.\n\t         *\n\t         * @example\n\t         *\n\t         *     cipher.reset();\n\t         */\n\t        reset: function () {\n\t            // Reset data buffer\n\t            BufferedBlockAlgorithm.reset.call(this);\n\n\t            // Perform concrete-cipher logic\n\t            this._doReset();\n\t        },\n\n\t        /**\n\t         * Adds data to be encrypted or decrypted.\n\t         *\n\t         * @param {WordArray|string} dataUpdate The data to encrypt or decrypt.\n\t         *\n\t         * @return {WordArray} The data after processing.\n\t         *\n\t         * @example\n\t         *\n\t         *     var encrypted = cipher.process('data');\n\t         *     var encrypted = cipher.process(wordArray);\n\t         */\n\t        process: function (dataUpdate) {\n\t            // Append\n\t            this._append(dataUpdate);\n\n\t            // Process available blocks\n\t            return this._process();\n\t        },\n\n\t        /**\n\t         * Finalizes the encryption or decryption process.\n\t         * Note that the finalize operation is effectively a destructive, read-once operation.\n\t         *\n\t         * @param {WordArray|string} dataUpdate The final data to encrypt or decrypt.\n\t         *\n\t         * @return {WordArray} The data after final processing.\n\t         *\n\t         * @example\n\t         *\n\t         *     var encrypted = cipher.finalize();\n\t         *     var encrypted = cipher.finalize('data');\n\t         *     var encrypted = cipher.finalize(wordArray);\n\t         */\n\t        finalize: function (dataUpdate) {\n\t            // Final data update\n\t            if (dataUpdate) {\n\t                this._append(dataUpdate);\n\t            }\n\n\t            // Perform concrete-cipher logic\n\t            var finalProcessedData = this._doFinalize();\n\n\t            return finalProcessedData;\n\t        },\n\n\t        keySize: 128/32,\n\n\t        ivSize: 128/32,\n\n\t        _ENC_XFORM_MODE: 1,\n\n\t        _DEC_XFORM_MODE: 2,\n\n\t        /**\n\t         * Creates shortcut functions to a cipher's object interface.\n\t         *\n\t         * @param {Cipher} cipher The cipher to create a helper for.\n\t         *\n\t         * @return {Object} An object with encrypt and decrypt shortcut functions.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var AES = CryptoJS.lib.Cipher._createHelper(CryptoJS.algo.AES);\n\t         */\n\t        _createHelper: (function () {\n\t            function selectCipherStrategy(key) {\n\t                if (typeof key == 'string') {\n\t                    return PasswordBasedCipher;\n\t                } else {\n\t                    return SerializableCipher;\n\t                }\n\t            }\n\n\t            return function (cipher) {\n\t                return {\n\t                    encrypt: function (message, key, cfg) {\n\t                        return selectCipherStrategy(key).encrypt(cipher, message, key, cfg);\n\t                    },\n\n\t                    decrypt: function (ciphertext, key, cfg) {\n\t                        return selectCipherStrategy(key).decrypt(cipher, ciphertext, key, cfg);\n\t                    }\n\t                };\n\t            };\n\t        }())\n\t    });\n\n\t    /**\n\t     * Abstract base stream cipher template.\n\t     *\n\t     * @property {number} blockSize The number of 32-bit words this cipher operates on. Default: 1 (32 bits)\n\t     */\n\t    var StreamCipher = C_lib.StreamCipher = Cipher.extend({\n\t        _doFinalize: function () {\n\t            // Process partial blocks\n\t            var finalProcessedBlocks = this._process(!!'flush');\n\n\t            return finalProcessedBlocks;\n\t        },\n\n\t        blockSize: 1\n\t    });\n\n\t    /**\n\t     * Mode namespace.\n\t     */\n\t    var C_mode = C.mode = {};\n\n\t    /**\n\t     * Abstract base block cipher mode template.\n\t     */\n\t    var BlockCipherMode = C_lib.BlockCipherMode = Base.extend({\n\t        /**\n\t         * Creates this mode for encryption.\n\t         *\n\t         * @param {Cipher} cipher A block cipher instance.\n\t         * @param {Array} iv The IV words.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var mode = CryptoJS.mode.CBC.createEncryptor(cipher, iv.words);\n\t         */\n\t        createEncryptor: function (cipher, iv) {\n\t            return this.Encryptor.create(cipher, iv);\n\t        },\n\n\t        /**\n\t         * Creates this mode for decryption.\n\t         *\n\t         * @param {Cipher} cipher A block cipher instance.\n\t         * @param {Array} iv The IV words.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var mode = CryptoJS.mode.CBC.createDecryptor(cipher, iv.words);\n\t         */\n\t        createDecryptor: function (cipher, iv) {\n\t            return this.Decryptor.create(cipher, iv);\n\t        },\n\n\t        /**\n\t         * Initializes a newly created mode.\n\t         *\n\t         * @param {Cipher} cipher A block cipher instance.\n\t         * @param {Array} iv The IV words.\n\t         *\n\t         * @example\n\t         *\n\t         *     var mode = CryptoJS.mode.CBC.Encryptor.create(cipher, iv.words);\n\t         */\n\t        init: function (cipher, iv) {\n\t            this._cipher = cipher;\n\t            this._iv = iv;\n\t        }\n\t    });\n\n\t    /**\n\t     * Cipher Block Chaining mode.\n\t     */\n\t    var CBC = C_mode.CBC = (function () {\n\t        /**\n\t         * Abstract base CBC mode.\n\t         */\n\t        var CBC = BlockCipherMode.extend();\n\n\t        /**\n\t         * CBC encryptor.\n\t         */\n\t        CBC.Encryptor = CBC.extend({\n\t            /**\n\t             * Processes the data block at offset.\n\t             *\n\t             * @param {Array} words The data words to operate on.\n\t             * @param {number} offset The offset where the block starts.\n\t             *\n\t             * @example\n\t             *\n\t             *     mode.processBlock(data.words, offset);\n\t             */\n\t            processBlock: function (words, offset) {\n\t                // Shortcuts\n\t                var cipher = this._cipher;\n\t                var blockSize = cipher.blockSize;\n\n\t                // XOR and encrypt\n\t                xorBlock.call(this, words, offset, blockSize);\n\t                cipher.encryptBlock(words, offset);\n\n\t                // Remember this block to use with next block\n\t                this._prevBlock = words.slice(offset, offset + blockSize);\n\t            }\n\t        });\n\n\t        /**\n\t         * CBC decryptor.\n\t         */\n\t        CBC.Decryptor = CBC.extend({\n\t            /**\n\t             * Processes the data block at offset.\n\t             *\n\t             * @param {Array} words The data words to operate on.\n\t             * @param {number} offset The offset where the block starts.\n\t             *\n\t             * @example\n\t             *\n\t             *     mode.processBlock(data.words, offset);\n\t             */\n\t            processBlock: function (words, offset) {\n\t                // Shortcuts\n\t                var cipher = this._cipher;\n\t                var blockSize = cipher.blockSize;\n\n\t                // Remember this block to use with next block\n\t                var thisBlock = words.slice(offset, offset + blockSize);\n\n\t                // Decrypt and XOR\n\t                cipher.decryptBlock(words, offset);\n\t                xorBlock.call(this, words, offset, blockSize);\n\n\t                // This block becomes the previous block\n\t                this._prevBlock = thisBlock;\n\t            }\n\t        });\n\n\t        function xorBlock(words, offset, blockSize) {\n\t            var block;\n\n\t            // Shortcut\n\t            var iv = this._iv;\n\n\t            // Choose mixing block\n\t            if (iv) {\n\t                block = iv;\n\n\t                // Remove IV for subsequent blocks\n\t                this._iv = undefined;\n\t            } else {\n\t                block = this._prevBlock;\n\t            }\n\n\t            // XOR blocks\n\t            for (var i = 0; i < blockSize; i++) {\n\t                words[offset + i] ^= block[i];\n\t            }\n\t        }\n\n\t        return CBC;\n\t    }());\n\n\t    /**\n\t     * Padding namespace.\n\t     */\n\t    var C_pad = C.pad = {};\n\n\t    /**\n\t     * PKCS #5/7 padding strategy.\n\t     */\n\t    var Pkcs7 = C_pad.Pkcs7 = {\n\t        /**\n\t         * Pads data using the algorithm defined in PKCS #5/7.\n\t         *\n\t         * @param {WordArray} data The data to pad.\n\t         * @param {number} blockSize The multiple that the data should be padded to.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     CryptoJS.pad.Pkcs7.pad(wordArray, 4);\n\t         */\n\t        pad: function (data, blockSize) {\n\t            // Shortcut\n\t            var blockSizeBytes = blockSize * 4;\n\n\t            // Count padding bytes\n\t            var nPaddingBytes = blockSizeBytes - data.sigBytes % blockSizeBytes;\n\n\t            // Create padding word\n\t            var paddingWord = (nPaddingBytes << 24) | (nPaddingBytes << 16) | (nPaddingBytes << 8) | nPaddingBytes;\n\n\t            // Create padding\n\t            var paddingWords = [];\n\t            for (var i = 0; i < nPaddingBytes; i += 4) {\n\t                paddingWords.push(paddingWord);\n\t            }\n\t            var padding = WordArray.create(paddingWords, nPaddingBytes);\n\n\t            // Add padding\n\t            data.concat(padding);\n\t        },\n\n\t        /**\n\t         * Unpads data that had been padded using the algorithm defined in PKCS #5/7.\n\t         *\n\t         * @param {WordArray} data The data to unpad.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     CryptoJS.pad.Pkcs7.unpad(wordArray);\n\t         */\n\t        unpad: function (data) {\n\t            // Get number of padding bytes from last byte\n\t            var nPaddingBytes = data.words[(data.sigBytes - 1) >>> 2] & 0xff;\n\n\t            // Remove padding\n\t            data.sigBytes -= nPaddingBytes;\n\t        }\n\t    };\n\n\t    /**\n\t     * Abstract base block cipher template.\n\t     *\n\t     * @property {number} blockSize The number of 32-bit words this cipher operates on. Default: 4 (128 bits)\n\t     */\n\t    var BlockCipher = C_lib.BlockCipher = Cipher.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {Mode} mode The block mode to use. Default: CBC\n\t         * @property {Padding} padding The padding strategy to use. Default: Pkcs7\n\t         */\n\t        cfg: Cipher.cfg.extend({\n\t            mode: CBC,\n\t            padding: Pkcs7\n\t        }),\n\n\t        reset: function () {\n\t            var modeCreator;\n\n\t            // Reset cipher\n\t            Cipher.reset.call(this);\n\n\t            // Shortcuts\n\t            var cfg = this.cfg;\n\t            var iv = cfg.iv;\n\t            var mode = cfg.mode;\n\n\t            // Reset block mode\n\t            if (this._xformMode == this._ENC_XFORM_MODE) {\n\t                modeCreator = mode.createEncryptor;\n\t            } else /* if (this._xformMode == this._DEC_XFORM_MODE) */ {\n\t                modeCreator = mode.createDecryptor;\n\t                // Keep at least one block in the buffer for unpadding\n\t                this._minBufferSize = 1;\n\t            }\n\n\t            if (this._mode && this._mode.__creator == modeCreator) {\n\t                this._mode.init(this, iv && iv.words);\n\t            } else {\n\t                this._mode = modeCreator.call(mode, this, iv && iv.words);\n\t                this._mode.__creator = modeCreator;\n\t            }\n\t        },\n\n\t        _doProcessBlock: function (words, offset) {\n\t            this._mode.processBlock(words, offset);\n\t        },\n\n\t        _doFinalize: function () {\n\t            var finalProcessedBlocks;\n\n\t            // Shortcut\n\t            var padding = this.cfg.padding;\n\n\t            // Finalize\n\t            if (this._xformMode == this._ENC_XFORM_MODE) {\n\t                // Pad data\n\t                padding.pad(this._data, this.blockSize);\n\n\t                // Process final blocks\n\t                finalProcessedBlocks = this._process(!!'flush');\n\t            } else /* if (this._xformMode == this._DEC_XFORM_MODE) */ {\n\t                // Process final blocks\n\t                finalProcessedBlocks = this._process(!!'flush');\n\n\t                // Unpad data\n\t                padding.unpad(finalProcessedBlocks);\n\t            }\n\n\t            return finalProcessedBlocks;\n\t        },\n\n\t        blockSize: 128/32\n\t    });\n\n\t    /**\n\t     * A collection of cipher parameters.\n\t     *\n\t     * @property {WordArray} ciphertext The raw ciphertext.\n\t     * @property {WordArray} key The key to this ciphertext.\n\t     * @property {WordArray} iv The IV used in the ciphering operation.\n\t     * @property {WordArray} salt The salt used with a key derivation function.\n\t     * @property {Cipher} algorithm The cipher algorithm.\n\t     * @property {Mode} mode The block mode used in the ciphering operation.\n\t     * @property {Padding} padding The padding scheme used in the ciphering operation.\n\t     * @property {number} blockSize The block size of the cipher.\n\t     * @property {Format} formatter The default formatting strategy to convert this cipher params object to a string.\n\t     */\n\t    var CipherParams = C_lib.CipherParams = Base.extend({\n\t        /**\n\t         * Initializes a newly created cipher params object.\n\t         *\n\t         * @param {Object} cipherParams An object with any of the possible cipher parameters.\n\t         *\n\t         * @example\n\t         *\n\t         *     var cipherParams = CryptoJS.lib.CipherParams.create({\n\t         *         ciphertext: ciphertextWordArray,\n\t         *         key: keyWordArray,\n\t         *         iv: ivWordArray,\n\t         *         salt: saltWordArray,\n\t         *         algorithm: CryptoJS.algo.AES,\n\t         *         mode: CryptoJS.mode.CBC,\n\t         *         padding: CryptoJS.pad.PKCS7,\n\t         *         blockSize: 4,\n\t         *         formatter: CryptoJS.format.OpenSSL\n\t         *     });\n\t         */\n\t        init: function (cipherParams) {\n\t            this.mixIn(cipherParams);\n\t        },\n\n\t        /**\n\t         * Converts this cipher params object to a string.\n\t         *\n\t         * @param {Format} formatter (Optional) The formatting strategy to use.\n\t         *\n\t         * @return {string} The stringified cipher params.\n\t         *\n\t         * @throws Error If neither the formatter nor the default formatter is set.\n\t         *\n\t         * @example\n\t         *\n\t         *     var string = cipherParams + '';\n\t         *     var string = cipherParams.toString();\n\t         *     var string = cipherParams.toString(CryptoJS.format.OpenSSL);\n\t         */\n\t        toString: function (formatter) {\n\t            return (formatter || this.formatter).stringify(this);\n\t        }\n\t    });\n\n\t    /**\n\t     * Format namespace.\n\t     */\n\t    var C_format = C.format = {};\n\n\t    /**\n\t     * OpenSSL formatting strategy.\n\t     */\n\t    var OpenSSLFormatter = C_format.OpenSSL = {\n\t        /**\n\t         * Converts a cipher params object to an OpenSSL-compatible string.\n\t         *\n\t         * @param {CipherParams} cipherParams The cipher params object.\n\t         *\n\t         * @return {string} The OpenSSL-compatible string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var openSSLString = CryptoJS.format.OpenSSL.stringify(cipherParams);\n\t         */\n\t        stringify: function (cipherParams) {\n\t            var wordArray;\n\n\t            // Shortcuts\n\t            var ciphertext = cipherParams.ciphertext;\n\t            var salt = cipherParams.salt;\n\n\t            // Format\n\t            if (salt) {\n\t                wordArray = WordArray.create([0x53616c74, 0x65645f5f]).concat(salt).concat(ciphertext);\n\t            } else {\n\t                wordArray = ciphertext;\n\t            }\n\n\t            return wordArray.toString(Base64);\n\t        },\n\n\t        /**\n\t         * Converts an OpenSSL-compatible string to a cipher params object.\n\t         *\n\t         * @param {string} openSSLStr The OpenSSL-compatible string.\n\t         *\n\t         * @return {CipherParams} The cipher params object.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var cipherParams = CryptoJS.format.OpenSSL.parse(openSSLString);\n\t         */\n\t        parse: function (openSSLStr) {\n\t            var salt;\n\n\t            // Parse base64\n\t            var ciphertext = Base64.parse(openSSLStr);\n\n\t            // Shortcut\n\t            var ciphertextWords = ciphertext.words;\n\n\t            // Test for salt\n\t            if (ciphertextWords[0] == 0x53616c74 && ciphertextWords[1] == 0x65645f5f) {\n\t                // Extract salt\n\t                salt = WordArray.create(ciphertextWords.slice(2, 4));\n\n\t                // Remove salt from ciphertext\n\t                ciphertextWords.splice(0, 4);\n\t                ciphertext.sigBytes -= 16;\n\t            }\n\n\t            return CipherParams.create({ ciphertext: ciphertext, salt: salt });\n\t        }\n\t    };\n\n\t    /**\n\t     * A cipher wrapper that returns ciphertext as a serializable cipher params object.\n\t     */\n\t    var SerializableCipher = C_lib.SerializableCipher = Base.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {Formatter} format The formatting strategy to convert cipher param objects to and from a string. Default: OpenSSL\n\t         */\n\t        cfg: Base.extend({\n\t            format: OpenSSLFormatter\n\t        }),\n\n\t        /**\n\t         * Encrypts a message.\n\t         *\n\t         * @param {Cipher} cipher The cipher algorithm to use.\n\t         * @param {WordArray|string} message The message to encrypt.\n\t         * @param {WordArray} key The key.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @return {CipherParams} A cipher params object.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var ciphertextParams = CryptoJS.lib.SerializableCipher.encrypt(CryptoJS.algo.AES, message, key);\n\t         *     var ciphertextParams = CryptoJS.lib.SerializableCipher.encrypt(CryptoJS.algo.AES, message, key, { iv: iv });\n\t         *     var ciphertextParams = CryptoJS.lib.SerializableCipher.encrypt(CryptoJS.algo.AES, message, key, { iv: iv, format: CryptoJS.format.OpenSSL });\n\t         */\n\t        encrypt: function (cipher, message, key, cfg) {\n\t            // Apply config defaults\n\t            cfg = this.cfg.extend(cfg);\n\n\t            // Encrypt\n\t            var encryptor = cipher.createEncryptor(key, cfg);\n\t            var ciphertext = encryptor.finalize(message);\n\n\t            // Shortcut\n\t            var cipherCfg = encryptor.cfg;\n\n\t            // Create and return serializable cipher params\n\t            return CipherParams.create({\n\t                ciphertext: ciphertext,\n\t                key: key,\n\t                iv: cipherCfg.iv,\n\t                algorithm: cipher,\n\t                mode: cipherCfg.mode,\n\t                padding: cipherCfg.padding,\n\t                blockSize: cipher.blockSize,\n\t                formatter: cfg.format\n\t            });\n\t        },\n\n\t        /**\n\t         * Decrypts serialized ciphertext.\n\t         *\n\t         * @param {Cipher} cipher The cipher algorithm to use.\n\t         * @param {CipherParams|string} ciphertext The ciphertext to decrypt.\n\t         * @param {WordArray} key The key.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @return {WordArray} The plaintext.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var plaintext = CryptoJS.lib.SerializableCipher.decrypt(CryptoJS.algo.AES, formattedCiphertext, key, { iv: iv, format: CryptoJS.format.OpenSSL });\n\t         *     var plaintext = CryptoJS.lib.SerializableCipher.decrypt(CryptoJS.algo.AES, ciphertextParams, key, { iv: iv, format: CryptoJS.format.OpenSSL });\n\t         */\n\t        decrypt: function (cipher, ciphertext, key, cfg) {\n\t            // Apply config defaults\n\t            cfg = this.cfg.extend(cfg);\n\n\t            // Convert string to CipherParams\n\t            ciphertext = this._parse(ciphertext, cfg.format);\n\n\t            // Decrypt\n\t            var plaintext = cipher.createDecryptor(key, cfg).finalize(ciphertext.ciphertext);\n\n\t            return plaintext;\n\t        },\n\n\t        /**\n\t         * Converts serialized ciphertext to CipherParams,\n\t         * else assumed CipherParams already and returns ciphertext unchanged.\n\t         *\n\t         * @param {CipherParams|string} ciphertext The ciphertext.\n\t         * @param {Formatter} format The formatting strategy to use to parse serialized ciphertext.\n\t         *\n\t         * @return {CipherParams} The unserialized ciphertext.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var ciphertextParams = CryptoJS.lib.SerializableCipher._parse(ciphertextStringOrParams, format);\n\t         */\n\t        _parse: function (ciphertext, format) {\n\t            if (typeof ciphertext == 'string') {\n\t                return format.parse(ciphertext, this);\n\t            } else {\n\t                return ciphertext;\n\t            }\n\t        }\n\t    });\n\n\t    /**\n\t     * Key derivation function namespace.\n\t     */\n\t    var C_kdf = C.kdf = {};\n\n\t    /**\n\t     * OpenSSL key derivation function.\n\t     */\n\t    var OpenSSLKdf = C_kdf.OpenSSL = {\n\t        /**\n\t         * Derives a key and IV from a password.\n\t         *\n\t         * @param {string} password The password to derive from.\n\t         * @param {number} keySize The size in words of the key to generate.\n\t         * @param {number} ivSize The size in words of the IV to generate.\n\t         * @param {WordArray|string} salt (Optional) A 64-bit salt to use. If omitted, a salt will be generated randomly.\n\t         *\n\t         * @return {CipherParams} A cipher params object with the key, IV, and salt.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32);\n\t         *     var derivedParams = CryptoJS.kdf.OpenSSL.execute('Password', 256/32, 128/32, 'saltsalt');\n\t         */\n\t        execute: function (password, keySize, ivSize, salt) {\n\t            // Generate random salt\n\t            if (!salt) {\n\t                salt = WordArray.random(64/8);\n\t            }\n\n\t            // Derive key and IV\n\t            var key = EvpKDF.create({ keySize: keySize + ivSize }).compute(password, salt);\n\n\t            // Separate key and IV\n\t            var iv = WordArray.create(key.words.slice(keySize), ivSize * 4);\n\t            key.sigBytes = keySize * 4;\n\n\t            // Return params\n\t            return CipherParams.create({ key: key, iv: iv, salt: salt });\n\t        }\n\t    };\n\n\t    /**\n\t     * A serializable cipher wrapper that derives the key from a password,\n\t     * and returns ciphertext as a serializable cipher params object.\n\t     */\n\t    var PasswordBasedCipher = C_lib.PasswordBasedCipher = SerializableCipher.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {KDF} kdf The key derivation function to use to generate a key and IV from a password. Default: OpenSSL\n\t         */\n\t        cfg: SerializableCipher.cfg.extend({\n\t            kdf: OpenSSLKdf\n\t        }),\n\n\t        /**\n\t         * Encrypts a message using a password.\n\t         *\n\t         * @param {Cipher} cipher The cipher algorithm to use.\n\t         * @param {WordArray|string} message The message to encrypt.\n\t         * @param {string} password The password.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @return {CipherParams} A cipher params object.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var ciphertextParams = CryptoJS.lib.PasswordBasedCipher.encrypt(CryptoJS.algo.AES, message, 'password');\n\t         *     var ciphertextParams = CryptoJS.lib.PasswordBasedCipher.encrypt(CryptoJS.algo.AES, message, 'password', { format: CryptoJS.format.OpenSSL });\n\t         */\n\t        encrypt: function (cipher, message, password, cfg) {\n\t            // Apply config defaults\n\t            cfg = this.cfg.extend(cfg);\n\n\t            // Derive key and other params\n\t            var derivedParams = cfg.kdf.execute(password, cipher.keySize, cipher.ivSize);\n\n\t            // Add IV to config\n\t            cfg.iv = derivedParams.iv;\n\n\t            // Encrypt\n\t            var ciphertext = SerializableCipher.encrypt.call(this, cipher, message, derivedParams.key, cfg);\n\n\t            // Mix in derived params\n\t            ciphertext.mixIn(derivedParams);\n\n\t            return ciphertext;\n\t        },\n\n\t        /**\n\t         * Decrypts serialized ciphertext using a password.\n\t         *\n\t         * @param {Cipher} cipher The cipher algorithm to use.\n\t         * @param {CipherParams|string} ciphertext The ciphertext to decrypt.\n\t         * @param {string} password The password.\n\t         * @param {Object} cfg (Optional) The configuration options to use for this operation.\n\t         *\n\t         * @return {WordArray} The plaintext.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var plaintext = CryptoJS.lib.PasswordBasedCipher.decrypt(CryptoJS.algo.AES, formattedCiphertext, 'password', { format: CryptoJS.format.OpenSSL });\n\t         *     var plaintext = CryptoJS.lib.PasswordBasedCipher.decrypt(CryptoJS.algo.AES, ciphertextParams, 'password', { format: CryptoJS.format.OpenSSL });\n\t         */\n\t        decrypt: function (cipher, ciphertext, password, cfg) {\n\t            // Apply config defaults\n\t            cfg = this.cfg.extend(cfg);\n\n\t            // Convert string to CipherParams\n\t            ciphertext = this._parse(ciphertext, cfg.format);\n\n\t            // Derive key and other params\n\t            var derivedParams = cfg.kdf.execute(password, cipher.keySize, cipher.ivSize, ciphertext.salt);\n\n\t            // Add IV to config\n\t            cfg.iv = derivedParams.iv;\n\n\t            // Decrypt\n\t            var plaintext = SerializableCipher.decrypt.call(this, cipher, ciphertext, derivedParams.key, cfg);\n\n\t            return plaintext;\n\t        }\n\t    });\n\t}());\n\n\n}));","(function (module, exports) {\n  'use strict';\n\n  // Utils\n  function assert (val, msg) {\n    if (!val) throw new Error(msg || 'Assertion failed');\n  }\n\n  // Could use `inherits` module, but don't want to move from single file\n  // architecture yet.\n  function inherits (ctor, superCtor) {\n    ctor.super_ = superCtor;\n    var TempCtor = function () {};\n    TempCtor.prototype = superCtor.prototype;\n    ctor.prototype = new TempCtor();\n    ctor.prototype.constructor = ctor;\n  }\n\n  // BN\n\n  function BN (number, base, endian) {\n    if (BN.isBN(number)) {\n      return number;\n    }\n\n    this.negative = 0;\n    this.words = null;\n    this.length = 0;\n\n    // Reduction context\n    this.red = null;\n\n    if (number !== null) {\n      if (base === 'le' || base === 'be') {\n        endian = base;\n        base = 10;\n      }\n\n      this._init(number || 0, base || 10, endian || 'be');\n    }\n  }\n  if (typeof module === 'object') {\n    module.exports = BN;\n  } else {\n    exports.BN = BN;\n  }\n\n  BN.BN = BN;\n  BN.wordSize = 26;\n\n  var Buffer;\n  try {\n    if (typeof window !== 'undefined' && typeof window.Buffer !== 'undefined') {\n      Buffer = window.Buffer;\n    } else {\n      Buffer = require('buffer').Buffer;\n    }\n  } catch (e) {\n  }\n\n  BN.isBN = function isBN (num) {\n    if (num instanceof BN) {\n      return true;\n    }\n\n    return num !== null && typeof num === 'object' &&\n      num.constructor.wordSize === BN.wordSize && Array.isArray(num.words);\n  };\n\n  BN.max = function max (left, right) {\n    if (left.cmp(right) > 0) return left;\n    return right;\n  };\n\n  BN.min = function min (left, right) {\n    if (left.cmp(right) < 0) return left;\n    return right;\n  };\n\n  BN.prototype._init = function init (number, base, endian) {\n    if (typeof number === 'number') {\n      return this._initNumber(number, base, endian);\n    }\n\n    if (typeof number === 'object') {\n      return this._initArray(number, base, endian);\n    }\n\n    if (base === 'hex') {\n      base = 16;\n    }\n    assert(base === (base | 0) && base >= 2 && base <= 36);\n\n    number = number.toString().replace(/\\s+/g, '');\n    var start = 0;\n    if (number[0] === '-') {\n      start++;\n      this.negative = 1;\n    }\n\n    if (start < number.length) {\n      if (base === 16) {\n        this._parseHex(number, start, endian);\n      } else {\n        this._parseBase(number, base, start);\n        if (endian === 'le') {\n          this._initArray(this.toArray(), base, endian);\n        }\n      }\n    }\n  };\n\n  BN.prototype._initNumber = function _initNumber (number, base, endian) {\n    if (number < 0) {\n      this.negative = 1;\n      number = -number;\n    }\n    if (number < 0x4000000) {\n      this.words = [number & 0x3ffffff];\n      this.length = 1;\n    } else if (number < 0x10000000000000) {\n      this.words = [\n        number & 0x3ffffff,\n        (number / 0x4000000) & 0x3ffffff\n      ];\n      this.length = 2;\n    } else {\n      assert(number < 0x20000000000000); // 2 ^ 53 (unsafe)\n      this.words = [\n        number & 0x3ffffff,\n        (number / 0x4000000) & 0x3ffffff,\n        1\n      ];\n      this.length = 3;\n    }\n\n    if (endian !== 'le') return;\n\n    // Reverse the bytes\n    this._initArray(this.toArray(), base, endian);\n  };\n\n  BN.prototype._initArray = function _initArray (number, base, endian) {\n    // Perhaps a Uint8Array\n    assert(typeof number.length === 'number');\n    if (number.length <= 0) {\n      this.words = [0];\n      this.length = 1;\n      return this;\n    }\n\n    this.length = Math.ceil(number.length / 3);\n    this.words = new Array(this.length);\n    for (var i = 0; i < this.length; i++) {\n      this.words[i] = 0;\n    }\n\n    var j, w;\n    var off = 0;\n    if (endian === 'be') {\n      for (i = number.length - 1, j = 0; i >= 0; i -= 3) {\n        w = number[i] | (number[i - 1] << 8) | (number[i - 2] << 16);\n        this.words[j] |= (w << off) & 0x3ffffff;\n        this.words[j + 1] = (w >>> (26 - off)) & 0x3ffffff;\n        off += 24;\n        if (off >= 26) {\n          off -= 26;\n          j++;\n        }\n      }\n    } else if (endian === 'le') {\n      for (i = 0, j = 0; i < number.length; i += 3) {\n        w = number[i] | (number[i + 1] << 8) | (number[i + 2] << 16);\n        this.words[j] |= (w << off) & 0x3ffffff;\n        this.words[j + 1] = (w >>> (26 - off)) & 0x3ffffff;\n        off += 24;\n        if (off >= 26) {\n          off -= 26;\n          j++;\n        }\n      }\n    }\n    return this._strip();\n  };\n\n  function parseHex4Bits (string, index) {\n    var c = string.charCodeAt(index);\n    // '0' - '9'\n    if (c >= 48 && c <= 57) {\n      return c - 48;\n    // 'A' - 'F'\n    } else if (c >= 65 && c <= 70) {\n      return c - 55;\n    // 'a' - 'f'\n    } else if (c >= 97 && c <= 102) {\n      return c - 87;\n    } else {\n      assert(false, 'Invalid character in ' + string);\n    }\n  }\n\n  function parseHexByte (string, lowerBound, index) {\n    var r = parseHex4Bits(string, index);\n    if (index - 1 >= lowerBound) {\n      r |= parseHex4Bits(string, index - 1) << 4;\n    }\n    return r;\n  }\n\n  BN.prototype._parseHex = function _parseHex (number, start, endian) {\n    // Create possibly bigger array to ensure that it fits the number\n    this.length = Math.ceil((number.length - start) / 6);\n    this.words = new Array(this.length);\n    for (var i = 0; i < this.length; i++) {\n      this.words[i] = 0;\n    }\n\n    // 24-bits chunks\n    var off = 0;\n    var j = 0;\n\n    var w;\n    if (endian === 'be') {\n      for (i = number.length - 1; i >= start; i -= 2) {\n        w = parseHexByte(number, start, i) << off;\n        this.words[j] |= w & 0x3ffffff;\n        if (off >= 18) {\n          off -= 18;\n          j += 1;\n          this.words[j] |= w >>> 26;\n        } else {\n          off += 8;\n        }\n      }\n    } else {\n      var parseLength = number.length - start;\n      for (i = parseLength % 2 === 0 ? start + 1 : start; i < number.length; i += 2) {\n        w = parseHexByte(number, start, i) << off;\n        this.words[j] |= w & 0x3ffffff;\n        if (off >= 18) {\n          off -= 18;\n          j += 1;\n          this.words[j] |= w >>> 26;\n        } else {\n          off += 8;\n        }\n      }\n    }\n\n    this._strip();\n  };\n\n  function parseBase (str, start, end, mul) {\n    var r = 0;\n    var b = 0;\n    var len = Math.min(str.length, end);\n    for (var i = start; i < len; i++) {\n      var c = str.charCodeAt(i) - 48;\n\n      r *= mul;\n\n      // 'a'\n      if (c >= 49) {\n        b = c - 49 + 0xa;\n\n      // 'A'\n      } else if (c >= 17) {\n        b = c - 17 + 0xa;\n\n      // '0' - '9'\n      } else {\n        b = c;\n      }\n      assert(c >= 0 && b < mul, 'Invalid character');\n      r += b;\n    }\n    return r;\n  }\n\n  BN.prototype._parseBase = function _parseBase (number, base, start) {\n    // Initialize as zero\n    this.words = [0];\n    this.length = 1;\n\n    // Find length of limb in base\n    for (var limbLen = 0, limbPow = 1; limbPow <= 0x3ffffff; limbPow *= base) {\n      limbLen++;\n    }\n    limbLen--;\n    limbPow = (limbPow / base) | 0;\n\n    var total = number.length - start;\n    var mod = total % limbLen;\n    var end = Math.min(total, total - mod) + start;\n\n    var word = 0;\n    for (var i = start; i < end; i += limbLen) {\n      word = parseBase(number, i, i + limbLen, base);\n\n      this.imuln(limbPow);\n      if (this.words[0] + word < 0x4000000) {\n        this.words[0] += word;\n      } else {\n        this._iaddn(word);\n      }\n    }\n\n    if (mod !== 0) {\n      var pow = 1;\n      word = parseBase(number, i, number.length, base);\n\n      for (i = 0; i < mod; i++) {\n        pow *= base;\n      }\n\n      this.imuln(pow);\n      if (this.words[0] + word < 0x4000000) {\n        this.words[0] += word;\n      } else {\n        this._iaddn(word);\n      }\n    }\n\n    this._strip();\n  };\n\n  BN.prototype.copy = function copy (dest) {\n    dest.words = new Array(this.length);\n    for (var i = 0; i < this.length; i++) {\n      dest.words[i] = this.words[i];\n    }\n    dest.length = this.length;\n    dest.negative = this.negative;\n    dest.red = this.red;\n  };\n\n  function move (dest, src) {\n    dest.words = src.words;\n    dest.length = src.length;\n    dest.negative = src.negative;\n    dest.red = src.red;\n  }\n\n  BN.prototype._move = function _move (dest) {\n    move(dest, this);\n  };\n\n  BN.prototype.clone = function clone () {\n    var r = new BN(null);\n    this.copy(r);\n    return r;\n  };\n\n  BN.prototype._expand = function _expand (size) {\n    while (this.length < size) {\n      this.words[this.length++] = 0;\n    }\n    return this;\n  };\n\n  // Remove leading `0` from `this`\n  BN.prototype._strip = function strip () {\n    while (this.length > 1 && this.words[this.length - 1] === 0) {\n      this.length--;\n    }\n    return this._normSign();\n  };\n\n  BN.prototype._normSign = function _normSign () {\n    // -0 = 0\n    if (this.length === 1 && this.words[0] === 0) {\n      this.negative = 0;\n    }\n    return this;\n  };\n\n  // Check Symbol.for because not everywhere where Symbol defined\n  // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol#Browser_compatibility\n  if (typeof Symbol !== 'undefined' && typeof Symbol.for === 'function') {\n    try {\n      BN.prototype[Symbol.for('nodejs.util.inspect.custom')] = inspect;\n    } catch (e) {\n      BN.prototype.inspect = inspect;\n    }\n  } else {\n    BN.prototype.inspect = inspect;\n  }\n\n  function inspect () {\n    return (this.red ? '<BN-R: ' : '<BN: ') + this.toString(16) + '>';\n  }\n\n  /*\n\n  var zeros = [];\n  var groupSizes = [];\n  var groupBases = [];\n\n  var s = '';\n  var i = -1;\n  while (++i < BN.wordSize) {\n    zeros[i] = s;\n    s += '0';\n  }\n  groupSizes[0] = 0;\n  groupSizes[1] = 0;\n  groupBases[0] = 0;\n  groupBases[1] = 0;\n  var base = 2 - 1;\n  while (++base < 36 + 1) {\n    var groupSize = 0;\n    var groupBase = 1;\n    while (groupBase < (1 << BN.wordSize) / base) {\n      groupBase *= base;\n      groupSize += 1;\n    }\n    groupSizes[base] = groupSize;\n    groupBases[base] = groupBase;\n  }\n\n  */\n\n  var zeros = [\n    '',\n    '0',\n    '00',\n    '000',\n    '0000',\n    '00000',\n    '000000',\n    '0000000',\n    '00000000',\n    '000000000',\n    '0000000000',\n    '00000000000',\n    '000000000000',\n    '0000000000000',\n    '00000000000000',\n    '000000000000000',\n    '0000000000000000',\n    '00000000000000000',\n    '000000000000000000',\n    '0000000000000000000',\n    '00000000000000000000',\n    '000000000000000000000',\n    '0000000000000000000000',\n    '00000000000000000000000',\n    '000000000000000000000000',\n    '0000000000000000000000000'\n  ];\n\n  var groupSizes = [\n    0, 0,\n    25, 16, 12, 11, 10, 9, 8,\n    8, 7, 7, 7, 7, 6, 6,\n    6, 6, 6, 6, 6, 5, 5,\n    5, 5, 5, 5, 5, 5, 5,\n    5, 5, 5, 5, 5, 5, 5\n  ];\n\n  var groupBases = [\n    0, 0,\n    33554432, 43046721, 16777216, 48828125, 60466176, 40353607, 16777216,\n    43046721, 10000000, 19487171, 35831808, 62748517, 7529536, 11390625,\n    16777216, 24137569, 34012224, 47045881, 64000000, 4084101, 5153632,\n    6436343, 7962624, 9765625, 11881376, 14348907, 17210368, 20511149,\n    24300000, 28629151, 33554432, 39135393, 45435424, 52521875, 60466176\n  ];\n\n  BN.prototype.toString = function toString (base, padding) {\n    base = base || 10;\n    padding = padding | 0 || 1;\n\n    var out;\n    if (base === 16 || base === 'hex') {\n      out = '';\n      var off = 0;\n      var carry = 0;\n      for (var i = 0; i < this.length; i++) {\n        var w = this.words[i];\n        var word = (((w << off) | carry) & 0xffffff).toString(16);\n        carry = (w >>> (24 - off)) & 0xffffff;\n        if (carry !== 0 || i !== this.length - 1) {\n          out = zeros[6 - word.length] + word + out;\n        } else {\n          out = word + out;\n        }\n        off += 2;\n        if (off >= 26) {\n          off -= 26;\n          i--;\n        }\n      }\n      if (carry !== 0) {\n        out = carry.toString(16) + out;\n      }\n      while (out.length % padding !== 0) {\n        out = '0' + out;\n      }\n      if (this.negative !== 0) {\n        out = '-' + out;\n      }\n      return out;\n    }\n\n    if (base === (base | 0) && base >= 2 && base <= 36) {\n      // var groupSize = Math.floor(BN.wordSize * Math.LN2 / Math.log(base));\n      var groupSize = groupSizes[base];\n      // var groupBase = Math.pow(base, groupSize);\n      var groupBase = groupBases[base];\n      out = '';\n      var c = this.clone();\n      c.negative = 0;\n      while (!c.isZero()) {\n        var r = c.modrn(groupBase).toString(base);\n        c = c.idivn(groupBase);\n\n        if (!c.isZero()) {\n          out = zeros[groupSize - r.length] + r + out;\n        } else {\n          out = r + out;\n        }\n      }\n      if (this.isZero()) {\n        out = '0' + out;\n      }\n      while (out.length % padding !== 0) {\n        out = '0' + out;\n      }\n      if (this.negative !== 0) {\n        out = '-' + out;\n      }\n      return out;\n    }\n\n    assert(false, 'Base should be between 2 and 36');\n  };\n\n  BN.prototype.toNumber = function toNumber () {\n    var ret = this.words[0];\n    if (this.length === 2) {\n      ret += this.words[1] * 0x4000000;\n    } else if (this.length === 3 && this.words[2] === 0x01) {\n      // NOTE: at this stage it is known that the top bit is set\n      ret += 0x10000000000000 + (this.words[1] * 0x4000000);\n    } else if (this.length > 2) {\n      assert(false, 'Number can only safely store up to 53 bits');\n    }\n    return (this.negative !== 0) ? -ret : ret;\n  };\n\n  BN.prototype.toJSON = function toJSON () {\n    return this.toString(16, 2);\n  };\n\n  if (Buffer) {\n    BN.prototype.toBuffer = function toBuffer (endian, length) {\n      return this.toArrayLike(Buffer, endian, length);\n    };\n  }\n\n  BN.prototype.toArray = function toArray (endian, length) {\n    return this.toArrayLike(Array, endian, length);\n  };\n\n  var allocate = function allocate (ArrayType, size) {\n    if (ArrayType.allocUnsafe) {\n      return ArrayType.allocUnsafe(size);\n    }\n    return new ArrayType(size);\n  };\n\n  BN.prototype.toArrayLike = function toArrayLike (ArrayType, endian, length) {\n    this._strip();\n\n    var byteLength = this.byteLength();\n    var reqLength = length || Math.max(1, byteLength);\n    assert(byteLength <= reqLength, 'byte array longer than desired length');\n    assert(reqLength > 0, 'Requested array length <= 0');\n\n    var res = allocate(ArrayType, reqLength);\n    var postfix = endian === 'le' ? 'LE' : 'BE';\n    this['_toArrayLike' + postfix](res, byteLength);\n    return res;\n  };\n\n  BN.prototype._toArrayLikeLE = function _toArrayLikeLE (res, byteLength) {\n    var position = 0;\n    var carry = 0;\n\n    for (var i = 0, shift = 0; i < this.length; i++) {\n      var word = (this.words[i] << shift) | carry;\n\n      res[position++] = word & 0xff;\n      if (position < res.length) {\n        res[position++] = (word >> 8) & 0xff;\n      }\n      if (position < res.length) {\n        res[position++] = (word >> 16) & 0xff;\n      }\n\n      if (shift === 6) {\n        if (position < res.length) {\n          res[position++] = (word >> 24) & 0xff;\n        }\n        carry = 0;\n        shift = 0;\n      } else {\n        carry = word >>> 24;\n        shift += 2;\n      }\n    }\n\n    if (position < res.length) {\n      res[position++] = carry;\n\n      while (position < res.length) {\n        res[position++] = 0;\n      }\n    }\n  };\n\n  BN.prototype._toArrayLikeBE = function _toArrayLikeBE (res, byteLength) {\n    var position = res.length - 1;\n    var carry = 0;\n\n    for (var i = 0, shift = 0; i < this.length; i++) {\n      var word = (this.words[i] << shift) | carry;\n\n      res[position--] = word & 0xff;\n      if (position >= 0) {\n        res[position--] = (word >> 8) & 0xff;\n      }\n      if (position >= 0) {\n        res[position--] = (word >> 16) & 0xff;\n      }\n\n      if (shift === 6) {\n        if (position >= 0) {\n          res[position--] = (word >> 24) & 0xff;\n        }\n        carry = 0;\n        shift = 0;\n      } else {\n        carry = word >>> 24;\n        shift += 2;\n      }\n    }\n\n    if (position >= 0) {\n      res[position--] = carry;\n\n      while (position >= 0) {\n        res[position--] = 0;\n      }\n    }\n  };\n\n  if (Math.clz32) {\n    BN.prototype._countBits = function _countBits (w) {\n      return 32 - Math.clz32(w);\n    };\n  } else {\n    BN.prototype._countBits = function _countBits (w) {\n      var t = w;\n      var r = 0;\n      if (t >= 0x1000) {\n        r += 13;\n        t >>>= 13;\n      }\n      if (t >= 0x40) {\n        r += 7;\n        t >>>= 7;\n      }\n      if (t >= 0x8) {\n        r += 4;\n        t >>>= 4;\n      }\n      if (t >= 0x02) {\n        r += 2;\n        t >>>= 2;\n      }\n      return r + t;\n    };\n  }\n\n  BN.prototype._zeroBits = function _zeroBits (w) {\n    // Short-cut\n    if (w === 0) return 26;\n\n    var t = w;\n    var r = 0;\n    if ((t & 0x1fff) === 0) {\n      r += 13;\n      t >>>= 13;\n    }\n    if ((t & 0x7f) === 0) {\n      r += 7;\n      t >>>= 7;\n    }\n    if ((t & 0xf) === 0) {\n      r += 4;\n      t >>>= 4;\n    }\n    if ((t & 0x3) === 0) {\n      r += 2;\n      t >>>= 2;\n    }\n    if ((t & 0x1) === 0) {\n      r++;\n    }\n    return r;\n  };\n\n  // Return number of used bits in a BN\n  BN.prototype.bitLength = function bitLength () {\n    var w = this.words[this.length - 1];\n    var hi = this._countBits(w);\n    return (this.length - 1) * 26 + hi;\n  };\n\n  function toBitArray (num) {\n    var w = new Array(num.bitLength());\n\n    for (var bit = 0; bit < w.length; bit++) {\n      var off = (bit / 26) | 0;\n      var wbit = bit % 26;\n\n      w[bit] = (num.words[off] >>> wbit) & 0x01;\n    }\n\n    return w;\n  }\n\n  // Number of trailing zero bits\n  BN.prototype.zeroBits = function zeroBits () {\n    if (this.isZero()) return 0;\n\n    var r = 0;\n    for (var i = 0; i < this.length; i++) {\n      var b = this._zeroBits(this.words[i]);\n      r += b;\n      if (b !== 26) break;\n    }\n    return r;\n  };\n\n  BN.prototype.byteLength = function byteLength () {\n    return Math.ceil(this.bitLength() / 8);\n  };\n\n  BN.prototype.toTwos = function toTwos (width) {\n    if (this.negative !== 0) {\n      return this.abs().inotn(width).iaddn(1);\n    }\n    return this.clone();\n  };\n\n  BN.prototype.fromTwos = function fromTwos (width) {\n    if (this.testn(width - 1)) {\n      return this.notn(width).iaddn(1).ineg();\n    }\n    return this.clone();\n  };\n\n  BN.prototype.isNeg = function isNeg () {\n    return this.negative !== 0;\n  };\n\n  // Return negative clone of `this`\n  BN.prototype.neg = function neg () {\n    return this.clone().ineg();\n  };\n\n  BN.prototype.ineg = function ineg () {\n    if (!this.isZero()) {\n      this.negative ^= 1;\n    }\n\n    return this;\n  };\n\n  // Or `num` with `this` in-place\n  BN.prototype.iuor = function iuor (num) {\n    while (this.length < num.length) {\n      this.words[this.length++] = 0;\n    }\n\n    for (var i = 0; i < num.length; i++) {\n      this.words[i] = this.words[i] | num.words[i];\n    }\n\n    return this._strip();\n  };\n\n  BN.prototype.ior = function ior (num) {\n    assert((this.negative | num.negative) === 0);\n    return this.iuor(num);\n  };\n\n  // Or `num` with `this`\n  BN.prototype.or = function or (num) {\n    if (this.length > num.length) return this.clone().ior(num);\n    return num.clone().ior(this);\n  };\n\n  BN.prototype.uor = function uor (num) {\n    if (this.length > num.length) return this.clone().iuor(num);\n    return num.clone().iuor(this);\n  };\n\n  // And `num` with `this` in-place\n  BN.prototype.iuand = function iuand (num) {\n    // b = min-length(num, this)\n    var b;\n    if (this.length > num.length) {\n      b = num;\n    } else {\n      b = this;\n    }\n\n    for (var i = 0; i < b.length; i++) {\n      this.words[i] = this.words[i] & num.words[i];\n    }\n\n    this.length = b.length;\n\n    return this._strip();\n  };\n\n  BN.prototype.iand = function iand (num) {\n    assert((this.negative | num.negative) === 0);\n    return this.iuand(num);\n  };\n\n  // And `num` with `this`\n  BN.prototype.and = function and (num) {\n    if (this.length > num.length) return this.clone().iand(num);\n    return num.clone().iand(this);\n  };\n\n  BN.prototype.uand = function uand (num) {\n    if (this.length > num.length) return this.clone().iuand(num);\n    return num.clone().iuand(this);\n  };\n\n  // Xor `num` with `this` in-place\n  BN.prototype.iuxor = function iuxor (num) {\n    // a.length > b.length\n    var a;\n    var b;\n    if (this.length > num.length) {\n      a = this;\n      b = num;\n    } else {\n      a = num;\n      b = this;\n    }\n\n    for (var i = 0; i < b.length; i++) {\n      this.words[i] = a.words[i] ^ b.words[i];\n    }\n\n    if (this !== a) {\n      for (; i < a.length; i++) {\n        this.words[i] = a.words[i];\n      }\n    }\n\n    this.length = a.length;\n\n    return this._strip();\n  };\n\n  BN.prototype.ixor = function ixor (num) {\n    assert((this.negative | num.negative) === 0);\n    return this.iuxor(num);\n  };\n\n  // Xor `num` with `this`\n  BN.prototype.xor = function xor (num) {\n    if (this.length > num.length) return this.clone().ixor(num);\n    return num.clone().ixor(this);\n  };\n\n  BN.prototype.uxor = function uxor (num) {\n    if (this.length > num.length) return this.clone().iuxor(num);\n    return num.clone().iuxor(this);\n  };\n\n  // Not ``this`` with ``width`` bitwidth\n  BN.prototype.inotn = function inotn (width) {\n    assert(typeof width === 'number' && width >= 0);\n\n    var bytesNeeded = Math.ceil(width / 26) | 0;\n    var bitsLeft = width % 26;\n\n    // Extend the buffer with leading zeroes\n    this._expand(bytesNeeded);\n\n    if (bitsLeft > 0) {\n      bytesNeeded--;\n    }\n\n    // Handle complete words\n    for (var i = 0; i < bytesNeeded; i++) {\n      this.words[i] = ~this.words[i] & 0x3ffffff;\n    }\n\n    // Handle the residue\n    if (bitsLeft > 0) {\n      this.words[i] = ~this.words[i] & (0x3ffffff >> (26 - bitsLeft));\n    }\n\n    // And remove leading zeroes\n    return this._strip();\n  };\n\n  BN.prototype.notn = function notn (width) {\n    return this.clone().inotn(width);\n  };\n\n  // Set `bit` of `this`\n  BN.prototype.setn = function setn (bit, val) {\n    assert(typeof bit === 'number' && bit >= 0);\n\n    var off = (bit / 26) | 0;\n    var wbit = bit % 26;\n\n    this._expand(off + 1);\n\n    if (val) {\n      this.words[off] = this.words[off] | (1 << wbit);\n    } else {\n      this.words[off] = this.words[off] & ~(1 << wbit);\n    }\n\n    return this._strip();\n  };\n\n  // Add `num` to `this` in-place\n  BN.prototype.iadd = function iadd (num) {\n    var r;\n\n    // negative + positive\n    if (this.negative !== 0 && num.negative === 0) {\n      this.negative = 0;\n      r = this.isub(num);\n      this.negative ^= 1;\n      return this._normSign();\n\n    // positive + negative\n    } else if (this.negative === 0 && num.negative !== 0) {\n      num.negative = 0;\n      r = this.isub(num);\n      num.negative = 1;\n      return r._normSign();\n    }\n\n    // a.length > b.length\n    var a, b;\n    if (this.length > num.length) {\n      a = this;\n      b = num;\n    } else {\n      a = num;\n      b = this;\n    }\n\n    var carry = 0;\n    for (var i = 0; i < b.length; i++) {\n      r = (a.words[i] | 0) + (b.words[i] | 0) + carry;\n      this.words[i] = r & 0x3ffffff;\n      carry = r >>> 26;\n    }\n    for (; carry !== 0 && i < a.length; i++) {\n      r = (a.words[i] | 0) + carry;\n      this.words[i] = r & 0x3ffffff;\n      carry = r >>> 26;\n    }\n\n    this.length = a.length;\n    if (carry !== 0) {\n      this.words[this.length] = carry;\n      this.length++;\n    // Copy the rest of the words\n    } else if (a !== this) {\n      for (; i < a.length; i++) {\n        this.words[i] = a.words[i];\n      }\n    }\n\n    return this;\n  };\n\n  // Add `num` to `this`\n  BN.prototype.add = function add (num) {\n    var res;\n    if (num.negative !== 0 && this.negative === 0) {\n      num.negative = 0;\n      res = this.sub(num);\n      num.negative ^= 1;\n      return res;\n    } else if (num.negative === 0 && this.negative !== 0) {\n      this.negative = 0;\n      res = num.sub(this);\n      this.negative = 1;\n      return res;\n    }\n\n    if (this.length > num.length) return this.clone().iadd(num);\n\n    return num.clone().iadd(this);\n  };\n\n  // Subtract `num` from `this` in-place\n  BN.prototype.isub = function isub (num) {\n    // this - (-num) = this + num\n    if (num.negative !== 0) {\n      num.negative = 0;\n      var r = this.iadd(num);\n      num.negative = 1;\n      return r._normSign();\n\n    // -this - num = -(this + num)\n    } else if (this.negative !== 0) {\n      this.negative = 0;\n      this.iadd(num);\n      this.negative = 1;\n      return this._normSign();\n    }\n\n    // At this point both numbers are positive\n    var cmp = this.cmp(num);\n\n    // Optimization - zeroify\n    if (cmp === 0) {\n      this.negative = 0;\n      this.length = 1;\n      this.words[0] = 0;\n      return this;\n    }\n\n    // a > b\n    var a, b;\n    if (cmp > 0) {\n      a = this;\n      b = num;\n    } else {\n      a = num;\n      b = this;\n    }\n\n    var carry = 0;\n    for (var i = 0; i < b.length; i++) {\n      r = (a.words[i] | 0) - (b.words[i] | 0) + carry;\n      carry = r >> 26;\n      this.words[i] = r & 0x3ffffff;\n    }\n    for (; carry !== 0 && i < a.length; i++) {\n      r = (a.words[i] | 0) + carry;\n      carry = r >> 26;\n      this.words[i] = r & 0x3ffffff;\n    }\n\n    // Copy rest of the words\n    if (carry === 0 && i < a.length && a !== this) {\n      for (; i < a.length; i++) {\n        this.words[i] = a.words[i];\n      }\n    }\n\n    this.length = Math.max(this.length, i);\n\n    if (a !== this) {\n      this.negative = 1;\n    }\n\n    return this._strip();\n  };\n\n  // Subtract `num` from `this`\n  BN.prototype.sub = function sub (num) {\n    return this.clone().isub(num);\n  };\n\n  function smallMulTo (self, num, out) {\n    out.negative = num.negative ^ self.negative;\n    var len = (self.length + num.length) | 0;\n    out.length = len;\n    len = (len - 1) | 0;\n\n    // Peel one iteration (compiler can't do it, because of code complexity)\n    var a = self.words[0] | 0;\n    var b = num.words[0] | 0;\n    var r = a * b;\n\n    var lo = r & 0x3ffffff;\n    var carry = (r / 0x4000000) | 0;\n    out.words[0] = lo;\n\n    for (var k = 1; k < len; k++) {\n      // Sum all words with the same `i + j = k` and accumulate `ncarry`,\n      // note that ncarry could be >= 0x3ffffff\n      var ncarry = carry >>> 26;\n      var rword = carry & 0x3ffffff;\n      var maxJ = Math.min(k, num.length - 1);\n      for (var j = Math.max(0, k - self.length + 1); j <= maxJ; j++) {\n        var i = (k - j) | 0;\n        a = self.words[i] | 0;\n        b = num.words[j] | 0;\n        r = a * b + rword;\n        ncarry += (r / 0x4000000) | 0;\n        rword = r & 0x3ffffff;\n      }\n      out.words[k] = rword | 0;\n      carry = ncarry | 0;\n    }\n    if (carry !== 0) {\n      out.words[k] = carry | 0;\n    } else {\n      out.length--;\n    }\n\n    return out._strip();\n  }\n\n  // TODO(indutny): it may be reasonable to omit it for users who don't need\n  // to work with 256-bit numbers, otherwise it gives 20% improvement for 256-bit\n  // multiplication (like elliptic secp256k1).\n  var comb10MulTo = function comb10MulTo (self, num, out) {\n    var a = self.words;\n    var b = num.words;\n    var o = out.words;\n    var c = 0;\n    var lo;\n    var mid;\n    var hi;\n    var a0 = a[0] | 0;\n    var al0 = a0 & 0x1fff;\n    var ah0 = a0 >>> 13;\n    var a1 = a[1] | 0;\n    var al1 = a1 & 0x1fff;\n    var ah1 = a1 >>> 13;\n    var a2 = a[2] | 0;\n    var al2 = a2 & 0x1fff;\n    var ah2 = a2 >>> 13;\n    var a3 = a[3] | 0;\n    var al3 = a3 & 0x1fff;\n    var ah3 = a3 >>> 13;\n    var a4 = a[4] | 0;\n    var al4 = a4 & 0x1fff;\n    var ah4 = a4 >>> 13;\n    var a5 = a[5] | 0;\n    var al5 = a5 & 0x1fff;\n    var ah5 = a5 >>> 13;\n    var a6 = a[6] | 0;\n    var al6 = a6 & 0x1fff;\n    var ah6 = a6 >>> 13;\n    var a7 = a[7] | 0;\n    var al7 = a7 & 0x1fff;\n    var ah7 = a7 >>> 13;\n    var a8 = a[8] | 0;\n    var al8 = a8 & 0x1fff;\n    var ah8 = a8 >>> 13;\n    var a9 = a[9] | 0;\n    var al9 = a9 & 0x1fff;\n    var ah9 = a9 >>> 13;\n    var b0 = b[0] | 0;\n    var bl0 = b0 & 0x1fff;\n    var bh0 = b0 >>> 13;\n    var b1 = b[1] | 0;\n    var bl1 = b1 & 0x1fff;\n    var bh1 = b1 >>> 13;\n    var b2 = b[2] | 0;\n    var bl2 = b2 & 0x1fff;\n    var bh2 = b2 >>> 13;\n    var b3 = b[3] | 0;\n    var bl3 = b3 & 0x1fff;\n    var bh3 = b3 >>> 13;\n    var b4 = b[4] | 0;\n    var bl4 = b4 & 0x1fff;\n    var bh4 = b4 >>> 13;\n    var b5 = b[5] | 0;\n    var bl5 = b5 & 0x1fff;\n    var bh5 = b5 >>> 13;\n    var b6 = b[6] | 0;\n    var bl6 = b6 & 0x1fff;\n    var bh6 = b6 >>> 13;\n    var b7 = b[7] | 0;\n    var bl7 = b7 & 0x1fff;\n    var bh7 = b7 >>> 13;\n    var b8 = b[8] | 0;\n    var bl8 = b8 & 0x1fff;\n    var bh8 = b8 >>> 13;\n    var b9 = b[9] | 0;\n    var bl9 = b9 & 0x1fff;\n    var bh9 = b9 >>> 13;\n\n    out.negative = self.negative ^ num.negative;\n    out.length = 19;\n    /* k = 0 */\n    lo = Math.imul(al0, bl0);\n    mid = Math.imul(al0, bh0);\n    mid = (mid + Math.imul(ah0, bl0)) | 0;\n    hi = Math.imul(ah0, bh0);\n    var w0 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w0 >>> 26)) | 0;\n    w0 &= 0x3ffffff;\n    /* k = 1 */\n    lo = Math.imul(al1, bl0);\n    mid = Math.imul(al1, bh0);\n    mid = (mid + Math.imul(ah1, bl0)) | 0;\n    hi = Math.imul(ah1, bh0);\n    lo = (lo + Math.imul(al0, bl1)) | 0;\n    mid = (mid + Math.imul(al0, bh1)) | 0;\n    mid = (mid + Math.imul(ah0, bl1)) | 0;\n    hi = (hi + Math.imul(ah0, bh1)) | 0;\n    var w1 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w1 >>> 26)) | 0;\n    w1 &= 0x3ffffff;\n    /* k = 2 */\n    lo = Math.imul(al2, bl0);\n    mid = Math.imul(al2, bh0);\n    mid = (mid + Math.imul(ah2, bl0)) | 0;\n    hi = Math.imul(ah2, bh0);\n    lo = (lo + Math.imul(al1, bl1)) | 0;\n    mid = (mid + Math.imul(al1, bh1)) | 0;\n    mid = (mid + Math.imul(ah1, bl1)) | 0;\n    hi = (hi + Math.imul(ah1, bh1)) | 0;\n    lo = (lo + Math.imul(al0, bl2)) | 0;\n    mid = (mid + Math.imul(al0, bh2)) | 0;\n    mid = (mid + Math.imul(ah0, bl2)) | 0;\n    hi = (hi + Math.imul(ah0, bh2)) | 0;\n    var w2 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w2 >>> 26)) | 0;\n    w2 &= 0x3ffffff;\n    /* k = 3 */\n    lo = Math.imul(al3, bl0);\n    mid = Math.imul(al3, bh0);\n    mid = (mid + Math.imul(ah3, bl0)) | 0;\n    hi = Math.imul(ah3, bh0);\n    lo = (lo + Math.imul(al2, bl1)) | 0;\n    mid = (mid + Math.imul(al2, bh1)) | 0;\n    mid = (mid + Math.imul(ah2, bl1)) | 0;\n    hi = (hi + Math.imul(ah2, bh1)) | 0;\n    lo = (lo + Math.imul(al1, bl2)) | 0;\n    mid = (mid + Math.imul(al1, bh2)) | 0;\n    mid = (mid + Math.imul(ah1, bl2)) | 0;\n    hi = (hi + Math.imul(ah1, bh2)) | 0;\n    lo = (lo + Math.imul(al0, bl3)) | 0;\n    mid = (mid + Math.imul(al0, bh3)) | 0;\n    mid = (mid + Math.imul(ah0, bl3)) | 0;\n    hi = (hi + Math.imul(ah0, bh3)) | 0;\n    var w3 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w3 >>> 26)) | 0;\n    w3 &= 0x3ffffff;\n    /* k = 4 */\n    lo = Math.imul(al4, bl0);\n    mid = Math.imul(al4, bh0);\n    mid = (mid + Math.imul(ah4, bl0)) | 0;\n    hi = Math.imul(ah4, bh0);\n    lo = (lo + Math.imul(al3, bl1)) | 0;\n    mid = (mid + Math.imul(al3, bh1)) | 0;\n    mid = (mid + Math.imul(ah3, bl1)) | 0;\n    hi = (hi + Math.imul(ah3, bh1)) | 0;\n    lo = (lo + Math.imul(al2, bl2)) | 0;\n    mid = (mid + Math.imul(al2, bh2)) | 0;\n    mid = (mid + Math.imul(ah2, bl2)) | 0;\n    hi = (hi + Math.imul(ah2, bh2)) | 0;\n    lo = (lo + Math.imul(al1, bl3)) | 0;\n    mid = (mid + Math.imul(al1, bh3)) | 0;\n    mid = (mid + Math.imul(ah1, bl3)) | 0;\n    hi = (hi + Math.imul(ah1, bh3)) | 0;\n    lo = (lo + Math.imul(al0, bl4)) | 0;\n    mid = (mid + Math.imul(al0, bh4)) | 0;\n    mid = (mid + Math.imul(ah0, bl4)) | 0;\n    hi = (hi + Math.imul(ah0, bh4)) | 0;\n    var w4 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w4 >>> 26)) | 0;\n    w4 &= 0x3ffffff;\n    /* k = 5 */\n    lo = Math.imul(al5, bl0);\n    mid = Math.imul(al5, bh0);\n    mid = (mid + Math.imul(ah5, bl0)) | 0;\n    hi = Math.imul(ah5, bh0);\n    lo = (lo + Math.imul(al4, bl1)) | 0;\n    mid = (mid + Math.imul(al4, bh1)) | 0;\n    mid = (mid + Math.imul(ah4, bl1)) | 0;\n    hi = (hi + Math.imul(ah4, bh1)) | 0;\n    lo = (lo + Math.imul(al3, bl2)) | 0;\n    mid = (mid + Math.imul(al3, bh2)) | 0;\n    mid = (mid + Math.imul(ah3, bl2)) | 0;\n    hi = (hi + Math.imul(ah3, bh2)) | 0;\n    lo = (lo + Math.imul(al2, bl3)) | 0;\n    mid = (mid + Math.imul(al2, bh3)) | 0;\n    mid = (mid + Math.imul(ah2, bl3)) | 0;\n    hi = (hi + Math.imul(ah2, bh3)) | 0;\n    lo = (lo + Math.imul(al1, bl4)) | 0;\n    mid = (mid + Math.imul(al1, bh4)) | 0;\n    mid = (mid + Math.imul(ah1, bl4)) | 0;\n    hi = (hi + Math.imul(ah1, bh4)) | 0;\n    lo = (lo + Math.imul(al0, bl5)) | 0;\n    mid = (mid + Math.imul(al0, bh5)) | 0;\n    mid = (mid + Math.imul(ah0, bl5)) | 0;\n    hi = (hi + Math.imul(ah0, bh5)) | 0;\n    var w5 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w5 >>> 26)) | 0;\n    w5 &= 0x3ffffff;\n    /* k = 6 */\n    lo = Math.imul(al6, bl0);\n    mid = Math.imul(al6, bh0);\n    mid = (mid + Math.imul(ah6, bl0)) | 0;\n    hi = Math.imul(ah6, bh0);\n    lo = (lo + Math.imul(al5, bl1)) | 0;\n    mid = (mid + Math.imul(al5, bh1)) | 0;\n    mid = (mid + Math.imul(ah5, bl1)) | 0;\n    hi = (hi + Math.imul(ah5, bh1)) | 0;\n    lo = (lo + Math.imul(al4, bl2)) | 0;\n    mid = (mid + Math.imul(al4, bh2)) | 0;\n    mid = (mid + Math.imul(ah4, bl2)) | 0;\n    hi = (hi + Math.imul(ah4, bh2)) | 0;\n    lo = (lo + Math.imul(al3, bl3)) | 0;\n    mid = (mid + Math.imul(al3, bh3)) | 0;\n    mid = (mid + Math.imul(ah3, bl3)) | 0;\n    hi = (hi + Math.imul(ah3, bh3)) | 0;\n    lo = (lo + Math.imul(al2, bl4)) | 0;\n    mid = (mid + Math.imul(al2, bh4)) | 0;\n    mid = (mid + Math.imul(ah2, bl4)) | 0;\n    hi = (hi + Math.imul(ah2, bh4)) | 0;\n    lo = (lo + Math.imul(al1, bl5)) | 0;\n    mid = (mid + Math.imul(al1, bh5)) | 0;\n    mid = (mid + Math.imul(ah1, bl5)) | 0;\n    hi = (hi + Math.imul(ah1, bh5)) | 0;\n    lo = (lo + Math.imul(al0, bl6)) | 0;\n    mid = (mid + Math.imul(al0, bh6)) | 0;\n    mid = (mid + Math.imul(ah0, bl6)) | 0;\n    hi = (hi + Math.imul(ah0, bh6)) | 0;\n    var w6 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w6 >>> 26)) | 0;\n    w6 &= 0x3ffffff;\n    /* k = 7 */\n    lo = Math.imul(al7, bl0);\n    mid = Math.imul(al7, bh0);\n    mid = (mid + Math.imul(ah7, bl0)) | 0;\n    hi = Math.imul(ah7, bh0);\n    lo = (lo + Math.imul(al6, bl1)) | 0;\n    mid = (mid + Math.imul(al6, bh1)) | 0;\n    mid = (mid + Math.imul(ah6, bl1)) | 0;\n    hi = (hi + Math.imul(ah6, bh1)) | 0;\n    lo = (lo + Math.imul(al5, bl2)) | 0;\n    mid = (mid + Math.imul(al5, bh2)) | 0;\n    mid = (mid + Math.imul(ah5, bl2)) | 0;\n    hi = (hi + Math.imul(ah5, bh2)) | 0;\n    lo = (lo + Math.imul(al4, bl3)) | 0;\n    mid = (mid + Math.imul(al4, bh3)) | 0;\n    mid = (mid + Math.imul(ah4, bl3)) | 0;\n    hi = (hi + Math.imul(ah4, bh3)) | 0;\n    lo = (lo + Math.imul(al3, bl4)) | 0;\n    mid = (mid + Math.imul(al3, bh4)) | 0;\n    mid = (mid + Math.imul(ah3, bl4)) | 0;\n    hi = (hi + Math.imul(ah3, bh4)) | 0;\n    lo = (lo + Math.imul(al2, bl5)) | 0;\n    mid = (mid + Math.imul(al2, bh5)) | 0;\n    mid = (mid + Math.imul(ah2, bl5)) | 0;\n    hi = (hi + Math.imul(ah2, bh5)) | 0;\n    lo = (lo + Math.imul(al1, bl6)) | 0;\n    mid = (mid + Math.imul(al1, bh6)) | 0;\n    mid = (mid + Math.imul(ah1, bl6)) | 0;\n    hi = (hi + Math.imul(ah1, bh6)) | 0;\n    lo = (lo + Math.imul(al0, bl7)) | 0;\n    mid = (mid + Math.imul(al0, bh7)) | 0;\n    mid = (mid + Math.imul(ah0, bl7)) | 0;\n    hi = (hi + Math.imul(ah0, bh7)) | 0;\n    var w7 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w7 >>> 26)) | 0;\n    w7 &= 0x3ffffff;\n    /* k = 8 */\n    lo = Math.imul(al8, bl0);\n    mid = Math.imul(al8, bh0);\n    mid = (mid + Math.imul(ah8, bl0)) | 0;\n    hi = Math.imul(ah8, bh0);\n    lo = (lo + Math.imul(al7, bl1)) | 0;\n    mid = (mid + Math.imul(al7, bh1)) | 0;\n    mid = (mid + Math.imul(ah7, bl1)) | 0;\n    hi = (hi + Math.imul(ah7, bh1)) | 0;\n    lo = (lo + Math.imul(al6, bl2)) | 0;\n    mid = (mid + Math.imul(al6, bh2)) | 0;\n    mid = (mid + Math.imul(ah6, bl2)) | 0;\n    hi = (hi + Math.imul(ah6, bh2)) | 0;\n    lo = (lo + Math.imul(al5, bl3)) | 0;\n    mid = (mid + Math.imul(al5, bh3)) | 0;\n    mid = (mid + Math.imul(ah5, bl3)) | 0;\n    hi = (hi + Math.imul(ah5, bh3)) | 0;\n    lo = (lo + Math.imul(al4, bl4)) | 0;\n    mid = (mid + Math.imul(al4, bh4)) | 0;\n    mid = (mid + Math.imul(ah4, bl4)) | 0;\n    hi = (hi + Math.imul(ah4, bh4)) | 0;\n    lo = (lo + Math.imul(al3, bl5)) | 0;\n    mid = (mid + Math.imul(al3, bh5)) | 0;\n    mid = (mid + Math.imul(ah3, bl5)) | 0;\n    hi = (hi + Math.imul(ah3, bh5)) | 0;\n    lo = (lo + Math.imul(al2, bl6)) | 0;\n    mid = (mid + Math.imul(al2, bh6)) | 0;\n    mid = (mid + Math.imul(ah2, bl6)) | 0;\n    hi = (hi + Math.imul(ah2, bh6)) | 0;\n    lo = (lo + Math.imul(al1, bl7)) | 0;\n    mid = (mid + Math.imul(al1, bh7)) | 0;\n    mid = (mid + Math.imul(ah1, bl7)) | 0;\n    hi = (hi + Math.imul(ah1, bh7)) | 0;\n    lo = (lo + Math.imul(al0, bl8)) | 0;\n    mid = (mid + Math.imul(al0, bh8)) | 0;\n    mid = (mid + Math.imul(ah0, bl8)) | 0;\n    hi = (hi + Math.imul(ah0, bh8)) | 0;\n    var w8 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w8 >>> 26)) | 0;\n    w8 &= 0x3ffffff;\n    /* k = 9 */\n    lo = Math.imul(al9, bl0);\n    mid = Math.imul(al9, bh0);\n    mid = (mid + Math.imul(ah9, bl0)) | 0;\n    hi = Math.imul(ah9, bh0);\n    lo = (lo + Math.imul(al8, bl1)) | 0;\n    mid = (mid + Math.imul(al8, bh1)) | 0;\n    mid = (mid + Math.imul(ah8, bl1)) | 0;\n    hi = (hi + Math.imul(ah8, bh1)) | 0;\n    lo = (lo + Math.imul(al7, bl2)) | 0;\n    mid = (mid + Math.imul(al7, bh2)) | 0;\n    mid = (mid + Math.imul(ah7, bl2)) | 0;\n    hi = (hi + Math.imul(ah7, bh2)) | 0;\n    lo = (lo + Math.imul(al6, bl3)) | 0;\n    mid = (mid + Math.imul(al6, bh3)) | 0;\n    mid = (mid + Math.imul(ah6, bl3)) | 0;\n    hi = (hi + Math.imul(ah6, bh3)) | 0;\n    lo = (lo + Math.imul(al5, bl4)) | 0;\n    mid = (mid + Math.imul(al5, bh4)) | 0;\n    mid = (mid + Math.imul(ah5, bl4)) | 0;\n    hi = (hi + Math.imul(ah5, bh4)) | 0;\n    lo = (lo + Math.imul(al4, bl5)) | 0;\n    mid = (mid + Math.imul(al4, bh5)) | 0;\n    mid = (mid + Math.imul(ah4, bl5)) | 0;\n    hi = (hi + Math.imul(ah4, bh5)) | 0;\n    lo = (lo + Math.imul(al3, bl6)) | 0;\n    mid = (mid + Math.imul(al3, bh6)) | 0;\n    mid = (mid + Math.imul(ah3, bl6)) | 0;\n    hi = (hi + Math.imul(ah3, bh6)) | 0;\n    lo = (lo + Math.imul(al2, bl7)) | 0;\n    mid = (mid + Math.imul(al2, bh7)) | 0;\n    mid = (mid + Math.imul(ah2, bl7)) | 0;\n    hi = (hi + Math.imul(ah2, bh7)) | 0;\n    lo = (lo + Math.imul(al1, bl8)) | 0;\n    mid = (mid + Math.imul(al1, bh8)) | 0;\n    mid = (mid + Math.imul(ah1, bl8)) | 0;\n    hi = (hi + Math.imul(ah1, bh8)) | 0;\n    lo = (lo + Math.imul(al0, bl9)) | 0;\n    mid = (mid + Math.imul(al0, bh9)) | 0;\n    mid = (mid + Math.imul(ah0, bl9)) | 0;\n    hi = (hi + Math.imul(ah0, bh9)) | 0;\n    var w9 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w9 >>> 26)) | 0;\n    w9 &= 0x3ffffff;\n    /* k = 10 */\n    lo = Math.imul(al9, bl1);\n    mid = Math.imul(al9, bh1);\n    mid = (mid + Math.imul(ah9, bl1)) | 0;\n    hi = Math.imul(ah9, bh1);\n    lo = (lo + Math.imul(al8, bl2)) | 0;\n    mid = (mid + Math.imul(al8, bh2)) | 0;\n    mid = (mid + Math.imul(ah8, bl2)) | 0;\n    hi = (hi + Math.imul(ah8, bh2)) | 0;\n    lo = (lo + Math.imul(al7, bl3)) | 0;\n    mid = (mid + Math.imul(al7, bh3)) | 0;\n    mid = (mid + Math.imul(ah7, bl3)) | 0;\n    hi = (hi + Math.imul(ah7, bh3)) | 0;\n    lo = (lo + Math.imul(al6, bl4)) | 0;\n    mid = (mid + Math.imul(al6, bh4)) | 0;\n    mid = (mid + Math.imul(ah6, bl4)) | 0;\n    hi = (hi + Math.imul(ah6, bh4)) | 0;\n    lo = (lo + Math.imul(al5, bl5)) | 0;\n    mid = (mid + Math.imul(al5, bh5)) | 0;\n    mid = (mid + Math.imul(ah5, bl5)) | 0;\n    hi = (hi + Math.imul(ah5, bh5)) | 0;\n    lo = (lo + Math.imul(al4, bl6)) | 0;\n    mid = (mid + Math.imul(al4, bh6)) | 0;\n    mid = (mid + Math.imul(ah4, bl6)) | 0;\n    hi = (hi + Math.imul(ah4, bh6)) | 0;\n    lo = (lo + Math.imul(al3, bl7)) | 0;\n    mid = (mid + Math.imul(al3, bh7)) | 0;\n    mid = (mid + Math.imul(ah3, bl7)) | 0;\n    hi = (hi + Math.imul(ah3, bh7)) | 0;\n    lo = (lo + Math.imul(al2, bl8)) | 0;\n    mid = (mid + Math.imul(al2, bh8)) | 0;\n    mid = (mid + Math.imul(ah2, bl8)) | 0;\n    hi = (hi + Math.imul(ah2, bh8)) | 0;\n    lo = (lo + Math.imul(al1, bl9)) | 0;\n    mid = (mid + Math.imul(al1, bh9)) | 0;\n    mid = (mid + Math.imul(ah1, bl9)) | 0;\n    hi = (hi + Math.imul(ah1, bh9)) | 0;\n    var w10 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w10 >>> 26)) | 0;\n    w10 &= 0x3ffffff;\n    /* k = 11 */\n    lo = Math.imul(al9, bl2);\n    mid = Math.imul(al9, bh2);\n    mid = (mid + Math.imul(ah9, bl2)) | 0;\n    hi = Math.imul(ah9, bh2);\n    lo = (lo + Math.imul(al8, bl3)) | 0;\n    mid = (mid + Math.imul(al8, bh3)) | 0;\n    mid = (mid + Math.imul(ah8, bl3)) | 0;\n    hi = (hi + Math.imul(ah8, bh3)) | 0;\n    lo = (lo + Math.imul(al7, bl4)) | 0;\n    mid = (mid + Math.imul(al7, bh4)) | 0;\n    mid = (mid + Math.imul(ah7, bl4)) | 0;\n    hi = (hi + Math.imul(ah7, bh4)) | 0;\n    lo = (lo + Math.imul(al6, bl5)) | 0;\n    mid = (mid + Math.imul(al6, bh5)) | 0;\n    mid = (mid + Math.imul(ah6, bl5)) | 0;\n    hi = (hi + Math.imul(ah6, bh5)) | 0;\n    lo = (lo + Math.imul(al5, bl6)) | 0;\n    mid = (mid + Math.imul(al5, bh6)) | 0;\n    mid = (mid + Math.imul(ah5, bl6)) | 0;\n    hi = (hi + Math.imul(ah5, bh6)) | 0;\n    lo = (lo + Math.imul(al4, bl7)) | 0;\n    mid = (mid + Math.imul(al4, bh7)) | 0;\n    mid = (mid + Math.imul(ah4, bl7)) | 0;\n    hi = (hi + Math.imul(ah4, bh7)) | 0;\n    lo = (lo + Math.imul(al3, bl8)) | 0;\n    mid = (mid + Math.imul(al3, bh8)) | 0;\n    mid = (mid + Math.imul(ah3, bl8)) | 0;\n    hi = (hi + Math.imul(ah3, bh8)) | 0;\n    lo = (lo + Math.imul(al2, bl9)) | 0;\n    mid = (mid + Math.imul(al2, bh9)) | 0;\n    mid = (mid + Math.imul(ah2, bl9)) | 0;\n    hi = (hi + Math.imul(ah2, bh9)) | 0;\n    var w11 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w11 >>> 26)) | 0;\n    w11 &= 0x3ffffff;\n    /* k = 12 */\n    lo = Math.imul(al9, bl3);\n    mid = Math.imul(al9, bh3);\n    mid = (mid + Math.imul(ah9, bl3)) | 0;\n    hi = Math.imul(ah9, bh3);\n    lo = (lo + Math.imul(al8, bl4)) | 0;\n    mid = (mid + Math.imul(al8, bh4)) | 0;\n    mid = (mid + Math.imul(ah8, bl4)) | 0;\n    hi = (hi + Math.imul(ah8, bh4)) | 0;\n    lo = (lo + Math.imul(al7, bl5)) | 0;\n    mid = (mid + Math.imul(al7, bh5)) | 0;\n    mid = (mid + Math.imul(ah7, bl5)) | 0;\n    hi = (hi + Math.imul(ah7, bh5)) | 0;\n    lo = (lo + Math.imul(al6, bl6)) | 0;\n    mid = (mid + Math.imul(al6, bh6)) | 0;\n    mid = (mid + Math.imul(ah6, bl6)) | 0;\n    hi = (hi + Math.imul(ah6, bh6)) | 0;\n    lo = (lo + Math.imul(al5, bl7)) | 0;\n    mid = (mid + Math.imul(al5, bh7)) | 0;\n    mid = (mid + Math.imul(ah5, bl7)) | 0;\n    hi = (hi + Math.imul(ah5, bh7)) | 0;\n    lo = (lo + Math.imul(al4, bl8)) | 0;\n    mid = (mid + Math.imul(al4, bh8)) | 0;\n    mid = (mid + Math.imul(ah4, bl8)) | 0;\n    hi = (hi + Math.imul(ah4, bh8)) | 0;\n    lo = (lo + Math.imul(al3, bl9)) | 0;\n    mid = (mid + Math.imul(al3, bh9)) | 0;\n    mid = (mid + Math.imul(ah3, bl9)) | 0;\n    hi = (hi + Math.imul(ah3, bh9)) | 0;\n    var w12 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w12 >>> 26)) | 0;\n    w12 &= 0x3ffffff;\n    /* k = 13 */\n    lo = Math.imul(al9, bl4);\n    mid = Math.imul(al9, bh4);\n    mid = (mid + Math.imul(ah9, bl4)) | 0;\n    hi = Math.imul(ah9, bh4);\n    lo = (lo + Math.imul(al8, bl5)) | 0;\n    mid = (mid + Math.imul(al8, bh5)) | 0;\n    mid = (mid + Math.imul(ah8, bl5)) | 0;\n    hi = (hi + Math.imul(ah8, bh5)) | 0;\n    lo = (lo + Math.imul(al7, bl6)) | 0;\n    mid = (mid + Math.imul(al7, bh6)) | 0;\n    mid = (mid + Math.imul(ah7, bl6)) | 0;\n    hi = (hi + Math.imul(ah7, bh6)) | 0;\n    lo = (lo + Math.imul(al6, bl7)) | 0;\n    mid = (mid + Math.imul(al6, bh7)) | 0;\n    mid = (mid + Math.imul(ah6, bl7)) | 0;\n    hi = (hi + Math.imul(ah6, bh7)) | 0;\n    lo = (lo + Math.imul(al5, bl8)) | 0;\n    mid = (mid + Math.imul(al5, bh8)) | 0;\n    mid = (mid + Math.imul(ah5, bl8)) | 0;\n    hi = (hi + Math.imul(ah5, bh8)) | 0;\n    lo = (lo + Math.imul(al4, bl9)) | 0;\n    mid = (mid + Math.imul(al4, bh9)) | 0;\n    mid = (mid + Math.imul(ah4, bl9)) | 0;\n    hi = (hi + Math.imul(ah4, bh9)) | 0;\n    var w13 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w13 >>> 26)) | 0;\n    w13 &= 0x3ffffff;\n    /* k = 14 */\n    lo = Math.imul(al9, bl5);\n    mid = Math.imul(al9, bh5);\n    mid = (mid + Math.imul(ah9, bl5)) | 0;\n    hi = Math.imul(ah9, bh5);\n    lo = (lo + Math.imul(al8, bl6)) | 0;\n    mid = (mid + Math.imul(al8, bh6)) | 0;\n    mid = (mid + Math.imul(ah8, bl6)) | 0;\n    hi = (hi + Math.imul(ah8, bh6)) | 0;\n    lo = (lo + Math.imul(al7, bl7)) | 0;\n    mid = (mid + Math.imul(al7, bh7)) | 0;\n    mid = (mid + Math.imul(ah7, bl7)) | 0;\n    hi = (hi + Math.imul(ah7, bh7)) | 0;\n    lo = (lo + Math.imul(al6, bl8)) | 0;\n    mid = (mid + Math.imul(al6, bh8)) | 0;\n    mid = (mid + Math.imul(ah6, bl8)) | 0;\n    hi = (hi + Math.imul(ah6, bh8)) | 0;\n    lo = (lo + Math.imul(al5, bl9)) | 0;\n    mid = (mid + Math.imul(al5, bh9)) | 0;\n    mid = (mid + Math.imul(ah5, bl9)) | 0;\n    hi = (hi + Math.imul(ah5, bh9)) | 0;\n    var w14 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w14 >>> 26)) | 0;\n    w14 &= 0x3ffffff;\n    /* k = 15 */\n    lo = Math.imul(al9, bl6);\n    mid = Math.imul(al9, bh6);\n    mid = (mid + Math.imul(ah9, bl6)) | 0;\n    hi = Math.imul(ah9, bh6);\n    lo = (lo + Math.imul(al8, bl7)) | 0;\n    mid = (mid + Math.imul(al8, bh7)) | 0;\n    mid = (mid + Math.imul(ah8, bl7)) | 0;\n    hi = (hi + Math.imul(ah8, bh7)) | 0;\n    lo = (lo + Math.imul(al7, bl8)) | 0;\n    mid = (mid + Math.imul(al7, bh8)) | 0;\n    mid = (mid + Math.imul(ah7, bl8)) | 0;\n    hi = (hi + Math.imul(ah7, bh8)) | 0;\n    lo = (lo + Math.imul(al6, bl9)) | 0;\n    mid = (mid + Math.imul(al6, bh9)) | 0;\n    mid = (mid + Math.imul(ah6, bl9)) | 0;\n    hi = (hi + Math.imul(ah6, bh9)) | 0;\n    var w15 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w15 >>> 26)) | 0;\n    w15 &= 0x3ffffff;\n    /* k = 16 */\n    lo = Math.imul(al9, bl7);\n    mid = Math.imul(al9, bh7);\n    mid = (mid + Math.imul(ah9, bl7)) | 0;\n    hi = Math.imul(ah9, bh7);\n    lo = (lo + Math.imul(al8, bl8)) | 0;\n    mid = (mid + Math.imul(al8, bh8)) | 0;\n    mid = (mid + Math.imul(ah8, bl8)) | 0;\n    hi = (hi + Math.imul(ah8, bh8)) | 0;\n    lo = (lo + Math.imul(al7, bl9)) | 0;\n    mid = (mid + Math.imul(al7, bh9)) | 0;\n    mid = (mid + Math.imul(ah7, bl9)) | 0;\n    hi = (hi + Math.imul(ah7, bh9)) | 0;\n    var w16 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w16 >>> 26)) | 0;\n    w16 &= 0x3ffffff;\n    /* k = 17 */\n    lo = Math.imul(al9, bl8);\n    mid = Math.imul(al9, bh8);\n    mid = (mid + Math.imul(ah9, bl8)) | 0;\n    hi = Math.imul(ah9, bh8);\n    lo = (lo + Math.imul(al8, bl9)) | 0;\n    mid = (mid + Math.imul(al8, bh9)) | 0;\n    mid = (mid + Math.imul(ah8, bl9)) | 0;\n    hi = (hi + Math.imul(ah8, bh9)) | 0;\n    var w17 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w17 >>> 26)) | 0;\n    w17 &= 0x3ffffff;\n    /* k = 18 */\n    lo = Math.imul(al9, bl9);\n    mid = Math.imul(al9, bh9);\n    mid = (mid + Math.imul(ah9, bl9)) | 0;\n    hi = Math.imul(ah9, bh9);\n    var w18 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;\n    c = (((hi + (mid >>> 13)) | 0) + (w18 >>> 26)) | 0;\n    w18 &= 0x3ffffff;\n    o[0] = w0;\n    o[1] = w1;\n    o[2] = w2;\n    o[3] = w3;\n    o[4] = w4;\n    o[5] = w5;\n    o[6] = w6;\n    o[7] = w7;\n    o[8] = w8;\n    o[9] = w9;\n    o[10] = w10;\n    o[11] = w11;\n    o[12] = w12;\n    o[13] = w13;\n    o[14] = w14;\n    o[15] = w15;\n    o[16] = w16;\n    o[17] = w17;\n    o[18] = w18;\n    if (c !== 0) {\n      o[19] = c;\n      out.length++;\n    }\n    return out;\n  };\n\n  // Polyfill comb\n  if (!Math.imul) {\n    comb10MulTo = smallMulTo;\n  }\n\n  function bigMulTo (self, num, out) {\n    out.negative = num.negative ^ self.negative;\n    out.length = self.length + num.length;\n\n    var carry = 0;\n    var hncarry = 0;\n    for (var k = 0; k < out.length - 1; k++) {\n      // Sum all words with the same `i + j = k` and accumulate `ncarry`,\n      // note that ncarry could be >= 0x3ffffff\n      var ncarry = hncarry;\n      hncarry = 0;\n      var rword = carry & 0x3ffffff;\n      var maxJ = Math.min(k, num.length - 1);\n      for (var j = Math.max(0, k - self.length + 1); j <= maxJ; j++) {\n        var i = k - j;\n        var a = self.words[i] | 0;\n        var b = num.words[j] | 0;\n        var r = a * b;\n\n        var lo = r & 0x3ffffff;\n        ncarry = (ncarry + ((r / 0x4000000) | 0)) | 0;\n        lo = (lo + rword) | 0;\n        rword = lo & 0x3ffffff;\n        ncarry = (ncarry + (lo >>> 26)) | 0;\n\n        hncarry += ncarry >>> 26;\n        ncarry &= 0x3ffffff;\n      }\n      out.words[k] = rword;\n      carry = ncarry;\n      ncarry = hncarry;\n    }\n    if (carry !== 0) {\n      out.words[k] = carry;\n    } else {\n      out.length--;\n    }\n\n    return out._strip();\n  }\n\n  function jumboMulTo (self, num, out) {\n    // Temporary disable, see https://github.com/indutny/bn.js/issues/211\n    // var fftm = new FFTM();\n    // return fftm.mulp(self, num, out);\n    return bigMulTo(self, num, out);\n  }\n\n  BN.prototype.mulTo = function mulTo (num, out) {\n    var res;\n    var len = this.length + num.length;\n    if (this.length === 10 && num.length === 10) {\n      res = comb10MulTo(this, num, out);\n    } else if (len < 63) {\n      res = smallMulTo(this, num, out);\n    } else if (len < 1024) {\n      res = bigMulTo(this, num, out);\n    } else {\n      res = jumboMulTo(this, num, out);\n    }\n\n    return res;\n  };\n\n  // Cooley-Tukey algorithm for FFT\n  // slightly revisited to rely on looping instead of recursion\n\n  function FFTM (x, y) {\n    this.x = x;\n    this.y = y;\n  }\n\n  FFTM.prototype.makeRBT = function makeRBT (N) {\n    var t = new Array(N);\n    var l = BN.prototype._countBits(N) - 1;\n    for (var i = 0; i < N; i++) {\n      t[i] = this.revBin(i, l, N);\n    }\n\n    return t;\n  };\n\n  // Returns binary-reversed representation of `x`\n  FFTM.prototype.revBin = function revBin (x, l, N) {\n    if (x === 0 || x === N - 1) return x;\n\n    var rb = 0;\n    for (var i = 0; i < l; i++) {\n      rb |= (x & 1) << (l - i - 1);\n      x >>= 1;\n    }\n\n    return rb;\n  };\n\n  // Performs \"tweedling\" phase, therefore 'emulating'\n  // behaviour of the recursive algorithm\n  FFTM.prototype.permute = function permute (rbt, rws, iws, rtws, itws, N) {\n    for (var i = 0; i < N; i++) {\n      rtws[i] = rws[rbt[i]];\n      itws[i] = iws[rbt[i]];\n    }\n  };\n\n  FFTM.prototype.transform = function transform (rws, iws, rtws, itws, N, rbt) {\n    this.permute(rbt, rws, iws, rtws, itws, N);\n\n    for (var s = 1; s < N; s <<= 1) {\n      var l = s << 1;\n\n      var rtwdf = Math.cos(2 * Math.PI / l);\n      var itwdf = Math.sin(2 * Math.PI / l);\n\n      for (var p = 0; p < N; p += l) {\n        var rtwdf_ = rtwdf;\n        var itwdf_ = itwdf;\n\n        for (var j = 0; j < s; j++) {\n          var re = rtws[p + j];\n          var ie = itws[p + j];\n\n          var ro = rtws[p + j + s];\n          var io = itws[p + j + s];\n\n          var rx = rtwdf_ * ro - itwdf_ * io;\n\n          io = rtwdf_ * io + itwdf_ * ro;\n          ro = rx;\n\n          rtws[p + j] = re + ro;\n          itws[p + j] = ie + io;\n\n          rtws[p + j + s] = re - ro;\n          itws[p + j + s] = ie - io;\n\n          /* jshint maxdepth : false */\n          if (j !== l) {\n            rx = rtwdf * rtwdf_ - itwdf * itwdf_;\n\n            itwdf_ = rtwdf * itwdf_ + itwdf * rtwdf_;\n            rtwdf_ = rx;\n          }\n        }\n      }\n    }\n  };\n\n  FFTM.prototype.guessLen13b = function guessLen13b (n, m) {\n    var N = Math.max(m, n) | 1;\n    var odd = N & 1;\n    var i = 0;\n    for (N = N / 2 | 0; N; N = N >>> 1) {\n      i++;\n    }\n\n    return 1 << i + 1 + odd;\n  };\n\n  FFTM.prototype.conjugate = function conjugate (rws, iws, N) {\n    if (N <= 1) return;\n\n    for (var i = 0; i < N / 2; i++) {\n      var t = rws[i];\n\n      rws[i] = rws[N - i - 1];\n      rws[N - i - 1] = t;\n\n      t = iws[i];\n\n      iws[i] = -iws[N - i - 1];\n      iws[N - i - 1] = -t;\n    }\n  };\n\n  FFTM.prototype.normalize13b = function normalize13b (ws, N) {\n    var carry = 0;\n    for (var i = 0; i < N / 2; i++) {\n      var w = Math.round(ws[2 * i + 1] / N) * 0x2000 +\n        Math.round(ws[2 * i] / N) +\n        carry;\n\n      ws[i] = w & 0x3ffffff;\n\n      if (w < 0x4000000) {\n        carry = 0;\n      } else {\n        carry = w / 0x4000000 | 0;\n      }\n    }\n\n    return ws;\n  };\n\n  FFTM.prototype.convert13b = function convert13b (ws, len, rws, N) {\n    var carry = 0;\n    for (var i = 0; i < len; i++) {\n      carry = carry + (ws[i] | 0);\n\n      rws[2 * i] = carry & 0x1fff; carry = carry >>> 13;\n      rws[2 * i + 1] = carry & 0x1fff; carry = carry >>> 13;\n    }\n\n    // Pad with zeroes\n    for (i = 2 * len; i < N; ++i) {\n      rws[i] = 0;\n    }\n\n    assert(carry === 0);\n    assert((carry & ~0x1fff) === 0);\n  };\n\n  FFTM.prototype.stub = function stub (N) {\n    var ph = new Array(N);\n    for (var i = 0; i < N; i++) {\n      ph[i] = 0;\n    }\n\n    return ph;\n  };\n\n  FFTM.prototype.mulp = function mulp (x, y, out) {\n    var N = 2 * this.guessLen13b(x.length, y.length);\n\n    var rbt = this.makeRBT(N);\n\n    var _ = this.stub(N);\n\n    var rws = new Array(N);\n    var rwst = new Array(N);\n    var iwst = new Array(N);\n\n    var nrws = new Array(N);\n    var nrwst = new Array(N);\n    var niwst = new Array(N);\n\n    var rmws = out.words;\n    rmws.length = N;\n\n    this.convert13b(x.words, x.length, rws, N);\n    this.convert13b(y.words, y.length, nrws, N);\n\n    this.transform(rws, _, rwst, iwst, N, rbt);\n    this.transform(nrws, _, nrwst, niwst, N, rbt);\n\n    for (var i = 0; i < N; i++) {\n      var rx = rwst[i] * nrwst[i] - iwst[i] * niwst[i];\n      iwst[i] = rwst[i] * niwst[i] + iwst[i] * nrwst[i];\n      rwst[i] = rx;\n    }\n\n    this.conjugate(rwst, iwst, N);\n    this.transform(rwst, iwst, rmws, _, N, rbt);\n    this.conjugate(rmws, _, N);\n    this.normalize13b(rmws, N);\n\n    out.negative = x.negative ^ y.negative;\n    out.length = x.length + y.length;\n    return out._strip();\n  };\n\n  // Multiply `this` by `num`\n  BN.prototype.mul = function mul (num) {\n    var out = new BN(null);\n    out.words = new Array(this.length + num.length);\n    return this.mulTo(num, out);\n  };\n\n  // Multiply employing FFT\n  BN.prototype.mulf = function mulf (num) {\n    var out = new BN(null);\n    out.words = new Array(this.length + num.length);\n    return jumboMulTo(this, num, out);\n  };\n\n  // In-place Multiplication\n  BN.prototype.imul = function imul (num) {\n    return this.clone().mulTo(num, this);\n  };\n\n  BN.prototype.imuln = function imuln (num) {\n    var isNegNum = num < 0;\n    if (isNegNum) num = -num;\n\n    assert(typeof num === 'number');\n    assert(num < 0x4000000);\n\n    // Carry\n    var carry = 0;\n    for (var i = 0; i < this.length; i++) {\n      var w = (this.words[i] | 0) * num;\n      var lo = (w & 0x3ffffff) + (carry & 0x3ffffff);\n      carry >>= 26;\n      carry += (w / 0x4000000) | 0;\n      // NOTE: lo is 27bit maximum\n      carry += lo >>> 26;\n      this.words[i] = lo & 0x3ffffff;\n    }\n\n    if (carry !== 0) {\n      this.words[i] = carry;\n      this.length++;\n    }\n\n    return isNegNum ? this.ineg() : this;\n  };\n\n  BN.prototype.muln = function muln (num) {\n    return this.clone().imuln(num);\n  };\n\n  // `this` * `this`\n  BN.prototype.sqr = function sqr () {\n    return this.mul(this);\n  };\n\n  // `this` * `this` in-place\n  BN.prototype.isqr = function isqr () {\n    return this.imul(this.clone());\n  };\n\n  // Math.pow(`this`, `num`)\n  BN.prototype.pow = function pow (num) {\n    var w = toBitArray(num);\n    if (w.length === 0) return new BN(1);\n\n    // Skip leading zeroes\n    var res = this;\n    for (var i = 0; i < w.length; i++, res = res.sqr()) {\n      if (w[i] !== 0) break;\n    }\n\n    if (++i < w.length) {\n      for (var q = res.sqr(); i < w.length; i++, q = q.sqr()) {\n        if (w[i] === 0) continue;\n\n        res = res.mul(q);\n      }\n    }\n\n    return res;\n  };\n\n  // Shift-left in-place\n  BN.prototype.iushln = function iushln (bits) {\n    assert(typeof bits === 'number' && bits >= 0);\n    var r = bits % 26;\n    var s = (bits - r) / 26;\n    var carryMask = (0x3ffffff >>> (26 - r)) << (26 - r);\n    var i;\n\n    if (r !== 0) {\n      var carry = 0;\n\n      for (i = 0; i < this.length; i++) {\n        var newCarry = this.words[i] & carryMask;\n        var c = ((this.words[i] | 0) - newCarry) << r;\n        this.words[i] = c | carry;\n        carry = newCarry >>> (26 - r);\n      }\n\n      if (carry) {\n        this.words[i] = carry;\n        this.length++;\n      }\n    }\n\n    if (s !== 0) {\n      for (i = this.length - 1; i >= 0; i--) {\n        this.words[i + s] = this.words[i];\n      }\n\n      for (i = 0; i < s; i++) {\n        this.words[i] = 0;\n      }\n\n      this.length += s;\n    }\n\n    return this._strip();\n  };\n\n  BN.prototype.ishln = function ishln (bits) {\n    // TODO(indutny): implement me\n    assert(this.negative === 0);\n    return this.iushln(bits);\n  };\n\n  // Shift-right in-place\n  // NOTE: `hint` is a lowest bit before trailing zeroes\n  // NOTE: if `extended` is present - it will be filled with destroyed bits\n  BN.prototype.iushrn = function iushrn (bits, hint, extended) {\n    assert(typeof bits === 'number' && bits >= 0);\n    var h;\n    if (hint) {\n      h = (hint - (hint % 26)) / 26;\n    } else {\n      h = 0;\n    }\n\n    var r = bits % 26;\n    var s = Math.min((bits - r) / 26, this.length);\n    var mask = 0x3ffffff ^ ((0x3ffffff >>> r) << r);\n    var maskedWords = extended;\n\n    h -= s;\n    h = Math.max(0, h);\n\n    // Extended mode, copy masked part\n    if (maskedWords) {\n      for (var i = 0; i < s; i++) {\n        maskedWords.words[i] = this.words[i];\n      }\n      maskedWords.length = s;\n    }\n\n    if (s === 0) {\n      // No-op, we should not move anything at all\n    } else if (this.length > s) {\n      this.length -= s;\n      for (i = 0; i < this.length; i++) {\n        this.words[i] = this.words[i + s];\n      }\n    } else {\n      this.words[0] = 0;\n      this.length = 1;\n    }\n\n    var carry = 0;\n    for (i = this.length - 1; i >= 0 && (carry !== 0 || i >= h); i--) {\n      var word = this.words[i] | 0;\n      this.words[i] = (carry << (26 - r)) | (word >>> r);\n      carry = word & mask;\n    }\n\n    // Push carried bits as a mask\n    if (maskedWords && carry !== 0) {\n      maskedWords.words[maskedWords.length++] = carry;\n    }\n\n    if (this.length === 0) {\n      this.words[0] = 0;\n      this.length = 1;\n    }\n\n    return this._strip();\n  };\n\n  BN.prototype.ishrn = function ishrn (bits, hint, extended) {\n    // TODO(indutny): implement me\n    assert(this.negative === 0);\n    return this.iushrn(bits, hint, extended);\n  };\n\n  // Shift-left\n  BN.prototype.shln = function shln (bits) {\n    return this.clone().ishln(bits);\n  };\n\n  BN.prototype.ushln = function ushln (bits) {\n    return this.clone().iushln(bits);\n  };\n\n  // Shift-right\n  BN.prototype.shrn = function shrn (bits) {\n    return this.clone().ishrn(bits);\n  };\n\n  BN.prototype.ushrn = function ushrn (bits) {\n    return this.clone().iushrn(bits);\n  };\n\n  // Test if n bit is set\n  BN.prototype.testn = function testn (bit) {\n    assert(typeof bit === 'number' && bit >= 0);\n    var r = bit % 26;\n    var s = (bit - r) / 26;\n    var q = 1 << r;\n\n    // Fast case: bit is much higher than all existing words\n    if (this.length <= s) return false;\n\n    // Check bit and return\n    var w = this.words[s];\n\n    return !!(w & q);\n  };\n\n  // Return only lowers bits of number (in-place)\n  BN.prototype.imaskn = function imaskn (bits) {\n    assert(typeof bits === 'number' && bits >= 0);\n    var r = bits % 26;\n    var s = (bits - r) / 26;\n\n    assert(this.negative === 0, 'imaskn works only with positive numbers');\n\n    if (this.length <= s) {\n      return this;\n    }\n\n    if (r !== 0) {\n      s++;\n    }\n    this.length = Math.min(s, this.length);\n\n    if (r !== 0) {\n      var mask = 0x3ffffff ^ ((0x3ffffff >>> r) << r);\n      this.words[this.length - 1] &= mask;\n    }\n\n    return this._strip();\n  };\n\n  // Return only lowers bits of number\n  BN.prototype.maskn = function maskn (bits) {\n    return this.clone().imaskn(bits);\n  };\n\n  // Add plain number `num` to `this`\n  BN.prototype.iaddn = function iaddn (num) {\n    assert(typeof num === 'number');\n    assert(num < 0x4000000);\n    if (num < 0) return this.isubn(-num);\n\n    // Possible sign change\n    if (this.negative !== 0) {\n      if (this.length === 1 && (this.words[0] | 0) <= num) {\n        this.words[0] = num - (this.words[0] | 0);\n        this.negative = 0;\n        return this;\n      }\n\n      this.negative = 0;\n      this.isubn(num);\n      this.negative = 1;\n      return this;\n    }\n\n    // Add without checks\n    return this._iaddn(num);\n  };\n\n  BN.prototype._iaddn = function _iaddn (num) {\n    this.words[0] += num;\n\n    // Carry\n    for (var i = 0; i < this.length && this.words[i] >= 0x4000000; i++) {\n      this.words[i] -= 0x4000000;\n      if (i === this.length - 1) {\n        this.words[i + 1] = 1;\n      } else {\n        this.words[i + 1]++;\n      }\n    }\n    this.length = Math.max(this.length, i + 1);\n\n    return this;\n  };\n\n  // Subtract plain number `num` from `this`\n  BN.prototype.isubn = function isubn (num) {\n    assert(typeof num === 'number');\n    assert(num < 0x4000000);\n    if (num < 0) return this.iaddn(-num);\n\n    if (this.negative !== 0) {\n      this.negative = 0;\n      this.iaddn(num);\n      this.negative = 1;\n      return this;\n    }\n\n    this.words[0] -= num;\n\n    if (this.length === 1 && this.words[0] < 0) {\n      this.words[0] = -this.words[0];\n      this.negative = 1;\n    } else {\n      // Carry\n      for (var i = 0; i < this.length && this.words[i] < 0; i++) {\n        this.words[i] += 0x4000000;\n        this.words[i + 1] -= 1;\n      }\n    }\n\n    return this._strip();\n  };\n\n  BN.prototype.addn = function addn (num) {\n    return this.clone().iaddn(num);\n  };\n\n  BN.prototype.subn = function subn (num) {\n    return this.clone().isubn(num);\n  };\n\n  BN.prototype.iabs = function iabs () {\n    this.negative = 0;\n\n    return this;\n  };\n\n  BN.prototype.abs = function abs () {\n    return this.clone().iabs();\n  };\n\n  BN.prototype._ishlnsubmul = function _ishlnsubmul (num, mul, shift) {\n    var len = num.length + shift;\n    var i;\n\n    this._expand(len);\n\n    var w;\n    var carry = 0;\n    for (i = 0; i < num.length; i++) {\n      w = (this.words[i + shift] | 0) + carry;\n      var right = (num.words[i] | 0) * mul;\n      w -= right & 0x3ffffff;\n      carry = (w >> 26) - ((right / 0x4000000) | 0);\n      this.words[i + shift] = w & 0x3ffffff;\n    }\n    for (; i < this.length - shift; i++) {\n      w = (this.words[i + shift] | 0) + carry;\n      carry = w >> 26;\n      this.words[i + shift] = w & 0x3ffffff;\n    }\n\n    if (carry === 0) return this._strip();\n\n    // Subtraction overflow\n    assert(carry === -1);\n    carry = 0;\n    for (i = 0; i < this.length; i++) {\n      w = -(this.words[i] | 0) + carry;\n      carry = w >> 26;\n      this.words[i] = w & 0x3ffffff;\n    }\n    this.negative = 1;\n\n    return this._strip();\n  };\n\n  BN.prototype._wordDiv = function _wordDiv (num, mode) {\n    var shift = this.length - num.length;\n\n    var a = this.clone();\n    var b = num;\n\n    // Normalize\n    var bhi = b.words[b.length - 1] | 0;\n    var bhiBits = this._countBits(bhi);\n    shift = 26 - bhiBits;\n    if (shift !== 0) {\n      b = b.ushln(shift);\n      a.iushln(shift);\n      bhi = b.words[b.length - 1] | 0;\n    }\n\n    // Initialize quotient\n    var m = a.length - b.length;\n    var q;\n\n    if (mode !== 'mod') {\n      q = new BN(null);\n      q.length = m + 1;\n      q.words = new Array(q.length);\n      for (var i = 0; i < q.length; i++) {\n        q.words[i] = 0;\n      }\n    }\n\n    var diff = a.clone()._ishlnsubmul(b, 1, m);\n    if (diff.negative === 0) {\n      a = diff;\n      if (q) {\n        q.words[m] = 1;\n      }\n    }\n\n    for (var j = m - 1; j >= 0; j--) {\n      var qj = (a.words[b.length + j] | 0) * 0x4000000 +\n        (a.words[b.length + j - 1] | 0);\n\n      // NOTE: (qj / bhi) is (0x3ffffff * 0x4000000 + 0x3ffffff) / 0x2000000 max\n      // (0x7ffffff)\n      qj = Math.min((qj / bhi) | 0, 0x3ffffff);\n\n      a._ishlnsubmul(b, qj, j);\n      while (a.negative !== 0) {\n        qj--;\n        a.negative = 0;\n        a._ishlnsubmul(b, 1, j);\n        if (!a.isZero()) {\n          a.negative ^= 1;\n        }\n      }\n      if (q) {\n        q.words[j] = qj;\n      }\n    }\n    if (q) {\n      q._strip();\n    }\n    a._strip();\n\n    // Denormalize\n    if (mode !== 'div' && shift !== 0) {\n      a.iushrn(shift);\n    }\n\n    return {\n      div: q || null,\n      mod: a\n    };\n  };\n\n  // NOTE: 1) `mode` can be set to `mod` to request mod only,\n  //       to `div` to request div only, or be absent to\n  //       request both div & mod\n  //       2) `positive` is true if unsigned mod is requested\n  BN.prototype.divmod = function divmod (num, mode, positive) {\n    assert(!num.isZero());\n\n    if (this.isZero()) {\n      return {\n        div: new BN(0),\n        mod: new BN(0)\n      };\n    }\n\n    var div, mod, res;\n    if (this.negative !== 0 && num.negative === 0) {\n      res = this.neg().divmod(num, mode);\n\n      if (mode !== 'mod') {\n        div = res.div.neg();\n      }\n\n      if (mode !== 'div') {\n        mod = res.mod.neg();\n        if (positive && mod.negative !== 0) {\n          mod.iadd(num);\n        }\n      }\n\n      return {\n        div: div,\n        mod: mod\n      };\n    }\n\n    if (this.negative === 0 && num.negative !== 0) {\n      res = this.divmod(num.neg(), mode);\n\n      if (mode !== 'mod') {\n        div = res.div.neg();\n      }\n\n      return {\n        div: div,\n        mod: res.mod\n      };\n    }\n\n    if ((this.negative & num.negative) !== 0) {\n      res = this.neg().divmod(num.neg(), mode);\n\n      if (mode !== 'div') {\n        mod = res.mod.neg();\n        if (positive && mod.negative !== 0) {\n          mod.isub(num);\n        }\n      }\n\n      return {\n        div: res.div,\n        mod: mod\n      };\n    }\n\n    // Both numbers are positive at this point\n\n    // Strip both numbers to approximate shift value\n    if (num.length > this.length || this.cmp(num) < 0) {\n      return {\n        div: new BN(0),\n        mod: this\n      };\n    }\n\n    // Very short reduction\n    if (num.length === 1) {\n      if (mode === 'div') {\n        return {\n          div: this.divn(num.words[0]),\n          mod: null\n        };\n      }\n\n      if (mode === 'mod') {\n        return {\n          div: null,\n          mod: new BN(this.modrn(num.words[0]))\n        };\n      }\n\n      return {\n        div: this.divn(num.words[0]),\n        mod: new BN(this.modrn(num.words[0]))\n      };\n    }\n\n    return this._wordDiv(num, mode);\n  };\n\n  // Find `this` / `num`\n  BN.prototype.div = function div (num) {\n    return this.divmod(num, 'div', false).div;\n  };\n\n  // Find `this` % `num`\n  BN.prototype.mod = function mod (num) {\n    return this.divmod(num, 'mod', false).mod;\n  };\n\n  BN.prototype.umod = function umod (num) {\n    return this.divmod(num, 'mod', true).mod;\n  };\n\n  // Find Round(`this` / `num`)\n  BN.prototype.divRound = function divRound (num) {\n    var dm = this.divmod(num);\n\n    // Fast case - exact division\n    if (dm.mod.isZero()) return dm.div;\n\n    var mod = dm.div.negative !== 0 ? dm.mod.isub(num) : dm.mod;\n\n    var half = num.ushrn(1);\n    var r2 = num.andln(1);\n    var cmp = mod.cmp(half);\n\n    // Round down\n    if (cmp < 0 || (r2 === 1 && cmp === 0)) return dm.div;\n\n    // Round up\n    return dm.div.negative !== 0 ? dm.div.isubn(1) : dm.div.iaddn(1);\n  };\n\n  BN.prototype.modrn = function modrn (num) {\n    var isNegNum = num < 0;\n    if (isNegNum) num = -num;\n\n    assert(num <= 0x3ffffff);\n    var p = (1 << 26) % num;\n\n    var acc = 0;\n    for (var i = this.length - 1; i >= 0; i--) {\n      acc = (p * acc + (this.words[i] | 0)) % num;\n    }\n\n    return isNegNum ? -acc : acc;\n  };\n\n  // WARNING: DEPRECATED\n  BN.prototype.modn = function modn (num) {\n    return this.modrn(num);\n  };\n\n  // In-place division by number\n  BN.prototype.idivn = function idivn (num) {\n    var isNegNum = num < 0;\n    if (isNegNum) num = -num;\n\n    assert(num <= 0x3ffffff);\n\n    var carry = 0;\n    for (var i = this.length - 1; i >= 0; i--) {\n      var w = (this.words[i] | 0) + carry * 0x4000000;\n      this.words[i] = (w / num) | 0;\n      carry = w % num;\n    }\n\n    this._strip();\n    return isNegNum ? this.ineg() : this;\n  };\n\n  BN.prototype.divn = function divn (num) {\n    return this.clone().idivn(num);\n  };\n\n  BN.prototype.egcd = function egcd (p) {\n    assert(p.negative === 0);\n    assert(!p.isZero());\n\n    var x = this;\n    var y = p.clone();\n\n    if (x.negative !== 0) {\n      x = x.umod(p);\n    } else {\n      x = x.clone();\n    }\n\n    // A * x + B * y = x\n    var A = new BN(1);\n    var B = new BN(0);\n\n    // C * x + D * y = y\n    var C = new BN(0);\n    var D = new BN(1);\n\n    var g = 0;\n\n    while (x.isEven() && y.isEven()) {\n      x.iushrn(1);\n      y.iushrn(1);\n      ++g;\n    }\n\n    var yp = y.clone();\n    var xp = x.clone();\n\n    while (!x.isZero()) {\n      for (var i = 0, im = 1; (x.words[0] & im) === 0 && i < 26; ++i, im <<= 1);\n      if (i > 0) {\n        x.iushrn(i);\n        while (i-- > 0) {\n          if (A.isOdd() || B.isOdd()) {\n            A.iadd(yp);\n            B.isub(xp);\n          }\n\n          A.iushrn(1);\n          B.iushrn(1);\n        }\n      }\n\n      for (var j = 0, jm = 1; (y.words[0] & jm) === 0 && j < 26; ++j, jm <<= 1);\n      if (j > 0) {\n        y.iushrn(j);\n        while (j-- > 0) {\n          if (C.isOdd() || D.isOdd()) {\n            C.iadd(yp);\n            D.isub(xp);\n          }\n\n          C.iushrn(1);\n          D.iushrn(1);\n        }\n      }\n\n      if (x.cmp(y) >= 0) {\n        x.isub(y);\n        A.isub(C);\n        B.isub(D);\n      } else {\n        y.isub(x);\n        C.isub(A);\n        D.isub(B);\n      }\n    }\n\n    return {\n      a: C,\n      b: D,\n      gcd: y.iushln(g)\n    };\n  };\n\n  // This is reduced incarnation of the binary EEA\n  // above, designated to invert members of the\n  // _prime_ fields F(p) at a maximal speed\n  BN.prototype._invmp = function _invmp (p) {\n    assert(p.negative === 0);\n    assert(!p.isZero());\n\n    var a = this;\n    var b = p.clone();\n\n    if (a.negative !== 0) {\n      a = a.umod(p);\n    } else {\n      a = a.clone();\n    }\n\n    var x1 = new BN(1);\n    var x2 = new BN(0);\n\n    var delta = b.clone();\n\n    while (a.cmpn(1) > 0 && b.cmpn(1) > 0) {\n      for (var i = 0, im = 1; (a.words[0] & im) === 0 && i < 26; ++i, im <<= 1);\n      if (i > 0) {\n        a.iushrn(i);\n        while (i-- > 0) {\n          if (x1.isOdd()) {\n            x1.iadd(delta);\n          }\n\n          x1.iushrn(1);\n        }\n      }\n\n      for (var j = 0, jm = 1; (b.words[0] & jm) === 0 && j < 26; ++j, jm <<= 1);\n      if (j > 0) {\n        b.iushrn(j);\n        while (j-- > 0) {\n          if (x2.isOdd()) {\n            x2.iadd(delta);\n          }\n\n          x2.iushrn(1);\n        }\n      }\n\n      if (a.cmp(b) >= 0) {\n        a.isub(b);\n        x1.isub(x2);\n      } else {\n        b.isub(a);\n        x2.isub(x1);\n      }\n    }\n\n    var res;\n    if (a.cmpn(1) === 0) {\n      res = x1;\n    } else {\n      res = x2;\n    }\n\n    if (res.cmpn(0) < 0) {\n      res.iadd(p);\n    }\n\n    return res;\n  };\n\n  BN.prototype.gcd = function gcd (num) {\n    if (this.isZero()) return num.abs();\n    if (num.isZero()) return this.abs();\n\n    var a = this.clone();\n    var b = num.clone();\n    a.negative = 0;\n    b.negative = 0;\n\n    // Remove common factor of two\n    for (var shift = 0; a.isEven() && b.isEven(); shift++) {\n      a.iushrn(1);\n      b.iushrn(1);\n    }\n\n    do {\n      while (a.isEven()) {\n        a.iushrn(1);\n      }\n      while (b.isEven()) {\n        b.iushrn(1);\n      }\n\n      var r = a.cmp(b);\n      if (r < 0) {\n        // Swap `a` and `b` to make `a` always bigger than `b`\n        var t = a;\n        a = b;\n        b = t;\n      } else if (r === 0 || b.cmpn(1) === 0) {\n        break;\n      }\n\n      a.isub(b);\n    } while (true);\n\n    return b.iushln(shift);\n  };\n\n  // Invert number in the field F(num)\n  BN.prototype.invm = function invm (num) {\n    return this.egcd(num).a.umod(num);\n  };\n\n  BN.prototype.isEven = function isEven () {\n    return (this.words[0] & 1) === 0;\n  };\n\n  BN.prototype.isOdd = function isOdd () {\n    return (this.words[0] & 1) === 1;\n  };\n\n  // And first word and num\n  BN.prototype.andln = function andln (num) {\n    return this.words[0] & num;\n  };\n\n  // Increment at the bit position in-line\n  BN.prototype.bincn = function bincn (bit) {\n    assert(typeof bit === 'number');\n    var r = bit % 26;\n    var s = (bit - r) / 26;\n    var q = 1 << r;\n\n    // Fast case: bit is much higher than all existing words\n    if (this.length <= s) {\n      this._expand(s + 1);\n      this.words[s] |= q;\n      return this;\n    }\n\n    // Add bit and propagate, if needed\n    var carry = q;\n    for (var i = s; carry !== 0 && i < this.length; i++) {\n      var w = this.words[i] | 0;\n      w += carry;\n      carry = w >>> 26;\n      w &= 0x3ffffff;\n      this.words[i] = w;\n    }\n    if (carry !== 0) {\n      this.words[i] = carry;\n      this.length++;\n    }\n    return this;\n  };\n\n  BN.prototype.isZero = function isZero () {\n    return this.length === 1 && this.words[0] === 0;\n  };\n\n  BN.prototype.cmpn = function cmpn (num) {\n    var negative = num < 0;\n\n    if (this.negative !== 0 && !negative) return -1;\n    if (this.negative === 0 && negative) return 1;\n\n    this._strip();\n\n    var res;\n    if (this.length > 1) {\n      res = 1;\n    } else {\n      if (negative) {\n        num = -num;\n      }\n\n      assert(num <= 0x3ffffff, 'Number is too big');\n\n      var w = this.words[0] | 0;\n      res = w === num ? 0 : w < num ? -1 : 1;\n    }\n    if (this.negative !== 0) return -res | 0;\n    return res;\n  };\n\n  // Compare two numbers and return:\n  // 1 - if `this` > `num`\n  // 0 - if `this` == `num`\n  // -1 - if `this` < `num`\n  BN.prototype.cmp = function cmp (num) {\n    if (this.negative !== 0 && num.negative === 0) return -1;\n    if (this.negative === 0 && num.negative !== 0) return 1;\n\n    var res = this.ucmp(num);\n    if (this.negative !== 0) return -res | 0;\n    return res;\n  };\n\n  // Unsigned comparison\n  BN.prototype.ucmp = function ucmp (num) {\n    // At this point both numbers have the same sign\n    if (this.length > num.length) return 1;\n    if (this.length < num.length) return -1;\n\n    var res = 0;\n    for (var i = this.length - 1; i >= 0; i--) {\n      var a = this.words[i] | 0;\n      var b = num.words[i] | 0;\n\n      if (a === b) continue;\n      if (a < b) {\n        res = -1;\n      } else if (a > b) {\n        res = 1;\n      }\n      break;\n    }\n    return res;\n  };\n\n  BN.prototype.gtn = function gtn (num) {\n    return this.cmpn(num) === 1;\n  };\n\n  BN.prototype.gt = function gt (num) {\n    return this.cmp(num) === 1;\n  };\n\n  BN.prototype.gten = function gten (num) {\n    return this.cmpn(num) >= 0;\n  };\n\n  BN.prototype.gte = function gte (num) {\n    return this.cmp(num) >= 0;\n  };\n\n  BN.prototype.ltn = function ltn (num) {\n    return this.cmpn(num) === -1;\n  };\n\n  BN.prototype.lt = function lt (num) {\n    return this.cmp(num) === -1;\n  };\n\n  BN.prototype.lten = function lten (num) {\n    return this.cmpn(num) <= 0;\n  };\n\n  BN.prototype.lte = function lte (num) {\n    return this.cmp(num) <= 0;\n  };\n\n  BN.prototype.eqn = function eqn (num) {\n    return this.cmpn(num) === 0;\n  };\n\n  BN.prototype.eq = function eq (num) {\n    return this.cmp(num) === 0;\n  };\n\n  //\n  // A reduce context, could be using montgomery or something better, depending\n  // on the `m` itself.\n  //\n  BN.red = function red (num) {\n    return new Red(num);\n  };\n\n  BN.prototype.toRed = function toRed (ctx) {\n    assert(!this.red, 'Already a number in reduction context');\n    assert(this.negative === 0, 'red works only with positives');\n    return ctx.convertTo(this)._forceRed(ctx);\n  };\n\n  BN.prototype.fromRed = function fromRed () {\n    assert(this.red, 'fromRed works only with numbers in reduction context');\n    return this.red.convertFrom(this);\n  };\n\n  BN.prototype._forceRed = function _forceRed (ctx) {\n    this.red = ctx;\n    return this;\n  };\n\n  BN.prototype.forceRed = function forceRed (ctx) {\n    assert(!this.red, 'Already a number in reduction context');\n    return this._forceRed(ctx);\n  };\n\n  BN.prototype.redAdd = function redAdd (num) {\n    assert(this.red, 'redAdd works only with red numbers');\n    return this.red.add(this, num);\n  };\n\n  BN.prototype.redIAdd = function redIAdd (num) {\n    assert(this.red, 'redIAdd works only with red numbers');\n    return this.red.iadd(this, num);\n  };\n\n  BN.prototype.redSub = function redSub (num) {\n    assert(this.red, 'redSub works only with red numbers');\n    return this.red.sub(this, num);\n  };\n\n  BN.prototype.redISub = function redISub (num) {\n    assert(this.red, 'redISub works only with red numbers');\n    return this.red.isub(this, num);\n  };\n\n  BN.prototype.redShl = function redShl (num) {\n    assert(this.red, 'redShl works only with red numbers');\n    return this.red.shl(this, num);\n  };\n\n  BN.prototype.redMul = function redMul (num) {\n    assert(this.red, 'redMul works only with red numbers');\n    this.red._verify2(this, num);\n    return this.red.mul(this, num);\n  };\n\n  BN.prototype.redIMul = function redIMul (num) {\n    assert(this.red, 'redMul works only with red numbers');\n    this.red._verify2(this, num);\n    return this.red.imul(this, num);\n  };\n\n  BN.prototype.redSqr = function redSqr () {\n    assert(this.red, 'redSqr works only with red numbers');\n    this.red._verify1(this);\n    return this.red.sqr(this);\n  };\n\n  BN.prototype.redISqr = function redISqr () {\n    assert(this.red, 'redISqr works only with red numbers');\n    this.red._verify1(this);\n    return this.red.isqr(this);\n  };\n\n  // Square root over p\n  BN.prototype.redSqrt = function redSqrt () {\n    assert(this.red, 'redSqrt works only with red numbers');\n    this.red._verify1(this);\n    return this.red.sqrt(this);\n  };\n\n  BN.prototype.redInvm = function redInvm () {\n    assert(this.red, 'redInvm works only with red numbers');\n    this.red._verify1(this);\n    return this.red.invm(this);\n  };\n\n  // Return negative clone of `this` % `red modulo`\n  BN.prototype.redNeg = function redNeg () {\n    assert(this.red, 'redNeg works only with red numbers');\n    this.red._verify1(this);\n    return this.red.neg(this);\n  };\n\n  BN.prototype.redPow = function redPow (num) {\n    assert(this.red && !num.red, 'redPow(normalNum)');\n    this.red._verify1(this);\n    return this.red.pow(this, num);\n  };\n\n  // Prime numbers with efficient reduction\n  var primes = {\n    k256: null,\n    p224: null,\n    p192: null,\n    p25519: null\n  };\n\n  // Pseudo-Mersenne prime\n  function MPrime (name, p) {\n    // P = 2 ^ N - K\n    this.name = name;\n    this.p = new BN(p, 16);\n    this.n = this.p.bitLength();\n    this.k = new BN(1).iushln(this.n).isub(this.p);\n\n    this.tmp = this._tmp();\n  }\n\n  MPrime.prototype._tmp = function _tmp () {\n    var tmp = new BN(null);\n    tmp.words = new Array(Math.ceil(this.n / 13));\n    return tmp;\n  };\n\n  MPrime.prototype.ireduce = function ireduce (num) {\n    // Assumes that `num` is less than `P^2`\n    // num = HI * (2 ^ N - K) + HI * K + LO = HI * K + LO (mod P)\n    var r = num;\n    var rlen;\n\n    do {\n      this.split(r, this.tmp);\n      r = this.imulK(r);\n      r = r.iadd(this.tmp);\n      rlen = r.bitLength();\n    } while (rlen > this.n);\n\n    var cmp = rlen < this.n ? -1 : r.ucmp(this.p);\n    if (cmp === 0) {\n      r.words[0] = 0;\n      r.length = 1;\n    } else if (cmp > 0) {\n      r.isub(this.p);\n    } else {\n      if (r.strip !== undefined) {\n        // r is a BN v4 instance\n        r.strip();\n      } else {\n        // r is a BN v5 instance\n        r._strip();\n      }\n    }\n\n    return r;\n  };\n\n  MPrime.prototype.split = function split (input, out) {\n    input.iushrn(this.n, 0, out);\n  };\n\n  MPrime.prototype.imulK = function imulK (num) {\n    return num.imul(this.k);\n  };\n\n  function K256 () {\n    MPrime.call(\n      this,\n      'k256',\n      'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffffe fffffc2f');\n  }\n  inherits(K256, MPrime);\n\n  K256.prototype.split = function split (input, output) {\n    // 256 = 9 * 26 + 22\n    var mask = 0x3fffff;\n\n    var outLen = Math.min(input.length, 9);\n    for (var i = 0; i < outLen; i++) {\n      output.words[i] = input.words[i];\n    }\n    output.length = outLen;\n\n    if (input.length <= 9) {\n      input.words[0] = 0;\n      input.length = 1;\n      return;\n    }\n\n    // Shift by 9 limbs\n    var prev = input.words[9];\n    output.words[output.length++] = prev & mask;\n\n    for (i = 10; i < input.length; i++) {\n      var next = input.words[i] | 0;\n      input.words[i - 10] = ((next & mask) << 4) | (prev >>> 22);\n      prev = next;\n    }\n    prev >>>= 22;\n    input.words[i - 10] = prev;\n    if (prev === 0 && input.length > 10) {\n      input.length -= 10;\n    } else {\n      input.length -= 9;\n    }\n  };\n\n  K256.prototype.imulK = function imulK (num) {\n    // K = 0x1000003d1 = [ 0x40, 0x3d1 ]\n    num.words[num.length] = 0;\n    num.words[num.length + 1] = 0;\n    num.length += 2;\n\n    // bounded at: 0x40 * 0x3ffffff + 0x3d0 = 0x100000390\n    var lo = 0;\n    for (var i = 0; i < num.length; i++) {\n      var w = num.words[i] | 0;\n      lo += w * 0x3d1;\n      num.words[i] = lo & 0x3ffffff;\n      lo = w * 0x40 + ((lo / 0x4000000) | 0);\n    }\n\n    // Fast length reduction\n    if (num.words[num.length - 1] === 0) {\n      num.length--;\n      if (num.words[num.length - 1] === 0) {\n        num.length--;\n      }\n    }\n    return num;\n  };\n\n  function P224 () {\n    MPrime.call(\n      this,\n      'p224',\n      'ffffffff ffffffff ffffffff ffffffff 00000000 00000000 00000001');\n  }\n  inherits(P224, MPrime);\n\n  function P192 () {\n    MPrime.call(\n      this,\n      'p192',\n      'ffffffff ffffffff ffffffff fffffffe ffffffff ffffffff');\n  }\n  inherits(P192, MPrime);\n\n  function P25519 () {\n    // 2 ^ 255 - 19\n    MPrime.call(\n      this,\n      '25519',\n      '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed');\n  }\n  inherits(P25519, MPrime);\n\n  P25519.prototype.imulK = function imulK (num) {\n    // K = 0x13\n    var carry = 0;\n    for (var i = 0; i < num.length; i++) {\n      var hi = (num.words[i] | 0) * 0x13 + carry;\n      var lo = hi & 0x3ffffff;\n      hi >>>= 26;\n\n      num.words[i] = lo;\n      carry = hi;\n    }\n    if (carry !== 0) {\n      num.words[num.length++] = carry;\n    }\n    return num;\n  };\n\n  // Exported mostly for testing purposes, use plain name instead\n  BN._prime = function prime (name) {\n    // Cached version of prime\n    if (primes[name]) return primes[name];\n\n    var prime;\n    if (name === 'k256') {\n      prime = new K256();\n    } else if (name === 'p224') {\n      prime = new P224();\n    } else if (name === 'p192') {\n      prime = new P192();\n    } else if (name === 'p25519') {\n      prime = new P25519();\n    } else {\n      throw new Error('Unknown prime ' + name);\n    }\n    primes[name] = prime;\n\n    return prime;\n  };\n\n  //\n  // Base reduction engine\n  //\n  function Red (m) {\n    if (typeof m === 'string') {\n      var prime = BN._prime(m);\n      this.m = prime.p;\n      this.prime = prime;\n    } else {\n      assert(m.gtn(1), 'modulus must be greater than 1');\n      this.m = m;\n      this.prime = null;\n    }\n  }\n\n  Red.prototype._verify1 = function _verify1 (a) {\n    assert(a.negative === 0, 'red works only with positives');\n    assert(a.red, 'red works only with red numbers');\n  };\n\n  Red.prototype._verify2 = function _verify2 (a, b) {\n    assert((a.negative | b.negative) === 0, 'red works only with positives');\n    assert(a.red && a.red === b.red,\n      'red works only with red numbers');\n  };\n\n  Red.prototype.imod = function imod (a) {\n    if (this.prime) return this.prime.ireduce(a)._forceRed(this);\n\n    move(a, a.umod(this.m)._forceRed(this));\n    return a;\n  };\n\n  Red.prototype.neg = function neg (a) {\n    if (a.isZero()) {\n      return a.clone();\n    }\n\n    return this.m.sub(a)._forceRed(this);\n  };\n\n  Red.prototype.add = function add (a, b) {\n    this._verify2(a, b);\n\n    var res = a.add(b);\n    if (res.cmp(this.m) >= 0) {\n      res.isub(this.m);\n    }\n    return res._forceRed(this);\n  };\n\n  Red.prototype.iadd = function iadd (a, b) {\n    this._verify2(a, b);\n\n    var res = a.iadd(b);\n    if (res.cmp(this.m) >= 0) {\n      res.isub(this.m);\n    }\n    return res;\n  };\n\n  Red.prototype.sub = function sub (a, b) {\n    this._verify2(a, b);\n\n    var res = a.sub(b);\n    if (res.cmpn(0) < 0) {\n      res.iadd(this.m);\n    }\n    return res._forceRed(this);\n  };\n\n  Red.prototype.isub = function isub (a, b) {\n    this._verify2(a, b);\n\n    var res = a.isub(b);\n    if (res.cmpn(0) < 0) {\n      res.iadd(this.m);\n    }\n    return res;\n  };\n\n  Red.prototype.shl = function shl (a, num) {\n    this._verify1(a);\n    return this.imod(a.ushln(num));\n  };\n\n  Red.prototype.imul = function imul (a, b) {\n    this._verify2(a, b);\n    return this.imod(a.imul(b));\n  };\n\n  Red.prototype.mul = function mul (a, b) {\n    this._verify2(a, b);\n    return this.imod(a.mul(b));\n  };\n\n  Red.prototype.isqr = function isqr (a) {\n    return this.imul(a, a.clone());\n  };\n\n  Red.prototype.sqr = function sqr (a) {\n    return this.mul(a, a);\n  };\n\n  Red.prototype.sqrt = function sqrt (a) {\n    if (a.isZero()) return a.clone();\n\n    var mod3 = this.m.andln(3);\n    assert(mod3 % 2 === 1);\n\n    // Fast case\n    if (mod3 === 3) {\n      var pow = this.m.add(new BN(1)).iushrn(2);\n      return this.pow(a, pow);\n    }\n\n    // Tonelli-Shanks algorithm (Totally unoptimized and slow)\n    //\n    // Find Q and S, that Q * 2 ^ S = (P - 1)\n    var q = this.m.subn(1);\n    var s = 0;\n    while (!q.isZero() && q.andln(1) === 0) {\n      s++;\n      q.iushrn(1);\n    }\n    assert(!q.isZero());\n\n    var one = new BN(1).toRed(this);\n    var nOne = one.redNeg();\n\n    // Find quadratic non-residue\n    // NOTE: Max is such because of generalized Riemann hypothesis.\n    var lpow = this.m.subn(1).iushrn(1);\n    var z = this.m.bitLength();\n    z = new BN(2 * z * z).toRed(this);\n\n    while (this.pow(z, lpow).cmp(nOne) !== 0) {\n      z.redIAdd(nOne);\n    }\n\n    var c = this.pow(z, q);\n    var r = this.pow(a, q.addn(1).iushrn(1));\n    var t = this.pow(a, q);\n    var m = s;\n    while (t.cmp(one) !== 0) {\n      var tmp = t;\n      for (var i = 0; tmp.cmp(one) !== 0; i++) {\n        tmp = tmp.redSqr();\n      }\n      assert(i < m);\n      var b = this.pow(c, new BN(1).iushln(m - i - 1));\n\n      r = r.redMul(b);\n      c = b.redSqr();\n      t = t.redMul(c);\n      m = i;\n    }\n\n    return r;\n  };\n\n  Red.prototype.invm = function invm (a) {\n    var inv = a._invmp(this.m);\n    if (inv.negative !== 0) {\n      inv.negative = 0;\n      return this.imod(inv).redNeg();\n    } else {\n      return this.imod(inv);\n    }\n  };\n\n  Red.prototype.pow = function pow (a, num) {\n    if (num.isZero()) return new BN(1).toRed(this);\n    if (num.cmpn(1) === 0) return a.clone();\n\n    var windowSize = 4;\n    var wnd = new Array(1 << windowSize);\n    wnd[0] = new BN(1).toRed(this);\n    wnd[1] = a;\n    for (var i = 2; i < wnd.length; i++) {\n      wnd[i] = this.mul(wnd[i - 1], a);\n    }\n\n    var res = wnd[0];\n    var current = 0;\n    var currentLen = 0;\n    var start = num.bitLength() % 26;\n    if (start === 0) {\n      start = 26;\n    }\n\n    for (i = num.length - 1; i >= 0; i--) {\n      var word = num.words[i];\n      for (var j = start - 1; j >= 0; j--) {\n        var bit = (word >> j) & 1;\n        if (res !== wnd[0]) {\n          res = this.sqr(res);\n        }\n\n        if (bit === 0 && current === 0) {\n          currentLen = 0;\n          continue;\n        }\n\n        current <<= 1;\n        current |= bit;\n        currentLen++;\n        if (currentLen !== windowSize && (i !== 0 || j !== 0)) continue;\n\n        res = this.mul(res, wnd[current]);\n        currentLen = 0;\n        current = 0;\n      }\n      start = 26;\n    }\n\n    return res;\n  };\n\n  Red.prototype.convertTo = function convertTo (num) {\n    var r = num.umod(this.m);\n\n    return r === num ? r.clone() : r;\n  };\n\n  Red.prototype.convertFrom = function convertFrom (num) {\n    var res = num.clone();\n    res.red = null;\n    return res;\n  };\n\n  //\n  // Montgomery method engine\n  //\n\n  BN.mont = function mont (num) {\n    return new Mont(num);\n  };\n\n  function Mont (m) {\n    Red.call(this, m);\n\n    this.shift = this.m.bitLength();\n    if (this.shift % 26 !== 0) {\n      this.shift += 26 - (this.shift % 26);\n    }\n\n    this.r = new BN(1).iushln(this.shift);\n    this.r2 = this.imod(this.r.sqr());\n    this.rinv = this.r._invmp(this.m);\n\n    this.minv = this.rinv.mul(this.r).isubn(1).div(this.m);\n    this.minv = this.minv.umod(this.r);\n    this.minv = this.r.sub(this.minv);\n  }\n  inherits(Mont, Red);\n\n  Mont.prototype.convertTo = function convertTo (num) {\n    return this.imod(num.ushln(this.shift));\n  };\n\n  Mont.prototype.convertFrom = function convertFrom (num) {\n    var r = this.imod(num.mul(this.rinv));\n    r.red = null;\n    return r;\n  };\n\n  Mont.prototype.imul = function imul (a, b) {\n    if (a.isZero() || b.isZero()) {\n      a.words[0] = 0;\n      a.length = 1;\n      return a;\n    }\n\n    var t = a.imul(b);\n    var c = t.maskn(this.shift).mul(this.minv).imaskn(this.shift).mul(this.m);\n    var u = t.isub(c).iushrn(this.shift);\n    var res = u;\n\n    if (u.cmp(this.m) >= 0) {\n      res = u.isub(this.m);\n    } else if (u.cmpn(0) < 0) {\n      res = u.iadd(this.m);\n    }\n\n    return res._forceRed(this);\n  };\n\n  Mont.prototype.mul = function mul (a, b) {\n    if (a.isZero() || b.isZero()) return new BN(0)._forceRed(this);\n\n    var t = a.mul(b);\n    var c = t.maskn(this.shift).mul(this.minv).imaskn(this.shift).mul(this.m);\n    var u = t.isub(c).iushrn(this.shift);\n    var res = u;\n    if (u.cmp(this.m) >= 0) {\n      res = u.isub(this.m);\n    } else if (u.cmpn(0) < 0) {\n      res = u.iadd(this.m);\n    }\n\n    return res._forceRed(this);\n  };\n\n  Mont.prototype.invm = function invm (a) {\n    // (AR)^-1 * R^2 = (A^-1 * R^-1) * R^2 = A^-1 * R\n    var res = this.imod(a._invmp(this.m).mul(this.r2));\n    return res._forceRed(this);\n  };\n})(typeof module === 'undefined' || module, this);\n","/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */\n/* eslint-disable node/no-deprecated-api */\nvar buffer = require('buffer')\nvar Buffer = buffer.Buffer\n\n// alternative to using Object.keys for old browsers\nfunction copyProps (src, dst) {\n  for (var key in src) {\n    dst[key] = src[key]\n  }\n}\nif (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {\n  module.exports = buffer\n} else {\n  // Copy properties from require('buffer')\n  copyProps(buffer, exports)\n  exports.Buffer = SafeBuffer\n}\n\nfunction SafeBuffer (arg, encodingOrOffset, length) {\n  return Buffer(arg, encodingOrOffset, length)\n}\n\nSafeBuffer.prototype = Object.create(Buffer.prototype)\n\n// Copy static methods from Buffer\ncopyProps(Buffer, SafeBuffer)\n\nSafeBuffer.from = function (arg, encodingOrOffset, length) {\n  if (typeof arg === 'number') {\n    throw new TypeError('Argument must not be a number')\n  }\n  return Buffer(arg, encodingOrOffset, length)\n}\n\nSafeBuffer.alloc = function (size, fill, encoding) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  var buf = Buffer(size)\n  if (fill !== undefined) {\n    if (typeof encoding === 'string') {\n      buf.fill(fill, encoding)\n    } else {\n      buf.fill(fill)\n    }\n  } else {\n    buf.fill(0)\n  }\n  return buf\n}\n\nSafeBuffer.allocUnsafe = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  return Buffer(size)\n}\n\nSafeBuffer.allocUnsafeSlow = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  return buffer.SlowBuffer(size)\n}\n","import { popperGenerator, detectOverflow } from \"./createPopper.js\";\nimport eventListeners from \"./modifiers/eventListeners.js\";\nimport popperOffsets from \"./modifiers/popperOffsets.js\";\nimport computeStyles from \"./modifiers/computeStyles.js\";\nimport applyStyles from \"./modifiers/applyStyles.js\";\nimport offset from \"./modifiers/offset.js\";\nimport flip from \"./modifiers/flip.js\";\nimport preventOverflow from \"./modifiers/preventOverflow.js\";\nimport arrow from \"./modifiers/arrow.js\";\nimport hide from \"./modifiers/hide.js\";\nvar defaultModifiers = [eventListeners, popperOffsets, computeStyles, applyStyles, offset, flip, preventOverflow, arrow, hide];\nvar createPopper = /*#__PURE__*/popperGenerator({\n  defaultModifiers: defaultModifiers\n}); // eslint-disable-next-line import/no-unused-modules\n\nexport { createPopper, popperGenerator, defaultModifiers, detectOverflow }; // eslint-disable-next-line import/no-unused-modules\n\nexport { createPopper as createPopperLite } from \"./popper-lite.js\"; // eslint-disable-next-line import/no-unused-modules\n\nexport * from \"./modifiers/index.js\";","// based on the aes implimentation in triple sec\n// https://github.com/keybase/triplesec\n// which is in turn based on the one from crypto-js\n// https://code.google.com/p/crypto-js/\n\nvar Buffer = require('safe-buffer').Buffer\n\nfunction asUInt32Array (buf) {\n  if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf)\n\n  var len = (buf.length / 4) | 0\n  var out = new Array(len)\n\n  for (var i = 0; i < len; i++) {\n    out[i] = buf.readUInt32BE(i * 4)\n  }\n\n  return out\n}\n\nfunction scrubVec (v) {\n  for (var i = 0; i < v.length; v++) {\n    v[i] = 0\n  }\n}\n\nfunction cryptBlock (M, keySchedule, SUB_MIX, SBOX, nRounds) {\n  var SUB_MIX0 = SUB_MIX[0]\n  var SUB_MIX1 = SUB_MIX[1]\n  var SUB_MIX2 = SUB_MIX[2]\n  var SUB_MIX3 = SUB_MIX[3]\n\n  var s0 = M[0] ^ keySchedule[0]\n  var s1 = M[1] ^ keySchedule[1]\n  var s2 = M[2] ^ keySchedule[2]\n  var s3 = M[3] ^ keySchedule[3]\n  var t0, t1, t2, t3\n  var ksRow = 4\n\n  for (var round = 1; round < nRounds; round++) {\n    t0 = SUB_MIX0[s0 >>> 24] ^ SUB_MIX1[(s1 >>> 16) & 0xff] ^ SUB_MIX2[(s2 >>> 8) & 0xff] ^ SUB_MIX3[s3 & 0xff] ^ keySchedule[ksRow++]\n    t1 = SUB_MIX0[s1 >>> 24] ^ SUB_MIX1[(s2 >>> 16) & 0xff] ^ SUB_MIX2[(s3 >>> 8) & 0xff] ^ SUB_MIX3[s0 & 0xff] ^ keySchedule[ksRow++]\n    t2 = SUB_MIX0[s2 >>> 24] ^ SUB_MIX1[(s3 >>> 16) & 0xff] ^ SUB_MIX2[(s0 >>> 8) & 0xff] ^ SUB_MIX3[s1 & 0xff] ^ keySchedule[ksRow++]\n    t3 = SUB_MIX0[s3 >>> 24] ^ SUB_MIX1[(s0 >>> 16) & 0xff] ^ SUB_MIX2[(s1 >>> 8) & 0xff] ^ SUB_MIX3[s2 & 0xff] ^ keySchedule[ksRow++]\n    s0 = t0\n    s1 = t1\n    s2 = t2\n    s3 = t3\n  }\n\n  t0 = ((SBOX[s0 >>> 24] << 24) | (SBOX[(s1 >>> 16) & 0xff] << 16) | (SBOX[(s2 >>> 8) & 0xff] << 8) | SBOX[s3 & 0xff]) ^ keySchedule[ksRow++]\n  t1 = ((SBOX[s1 >>> 24] << 24) | (SBOX[(s2 >>> 16) & 0xff] << 16) | (SBOX[(s3 >>> 8) & 0xff] << 8) | SBOX[s0 & 0xff]) ^ keySchedule[ksRow++]\n  t2 = ((SBOX[s2 >>> 24] << 24) | (SBOX[(s3 >>> 16) & 0xff] << 16) | (SBOX[(s0 >>> 8) & 0xff] << 8) | SBOX[s1 & 0xff]) ^ keySchedule[ksRow++]\n  t3 = ((SBOX[s3 >>> 24] << 24) | (SBOX[(s0 >>> 16) & 0xff] << 16) | (SBOX[(s1 >>> 8) & 0xff] << 8) | SBOX[s2 & 0xff]) ^ keySchedule[ksRow++]\n  t0 = t0 >>> 0\n  t1 = t1 >>> 0\n  t2 = t2 >>> 0\n  t3 = t3 >>> 0\n\n  return [t0, t1, t2, t3]\n}\n\n// AES constants\nvar RCON = [0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36]\nvar G = (function () {\n  // Compute double table\n  var d = new Array(256)\n  for (var j = 0; j < 256; j++) {\n    if (j < 128) {\n      d[j] = j << 1\n    } else {\n      d[j] = (j << 1) ^ 0x11b\n    }\n  }\n\n  var SBOX = []\n  var INV_SBOX = []\n  var SUB_MIX = [[], [], [], []]\n  var INV_SUB_MIX = [[], [], [], []]\n\n  // Walk GF(2^8)\n  var x = 0\n  var xi = 0\n  for (var i = 0; i < 256; ++i) {\n    // Compute sbox\n    var sx = xi ^ (xi << 1) ^ (xi << 2) ^ (xi << 3) ^ (xi << 4)\n    sx = (sx >>> 8) ^ (sx & 0xff) ^ 0x63\n    SBOX[x] = sx\n    INV_SBOX[sx] = x\n\n    // Compute multiplication\n    var x2 = d[x]\n    var x4 = d[x2]\n    var x8 = d[x4]\n\n    // Compute sub bytes, mix columns tables\n    var t = (d[sx] * 0x101) ^ (sx * 0x1010100)\n    SUB_MIX[0][x] = (t << 24) | (t >>> 8)\n    SUB_MIX[1][x] = (t << 16) | (t >>> 16)\n    SUB_MIX[2][x] = (t << 8) | (t >>> 24)\n    SUB_MIX[3][x] = t\n\n    // Compute inv sub bytes, inv mix columns tables\n    t = (x8 * 0x1010101) ^ (x4 * 0x10001) ^ (x2 * 0x101) ^ (x * 0x1010100)\n    INV_SUB_MIX[0][sx] = (t << 24) | (t >>> 8)\n    INV_SUB_MIX[1][sx] = (t << 16) | (t >>> 16)\n    INV_SUB_MIX[2][sx] = (t << 8) | (t >>> 24)\n    INV_SUB_MIX[3][sx] = t\n\n    if (x === 0) {\n      x = xi = 1\n    } else {\n      x = x2 ^ d[d[d[x8 ^ x2]]]\n      xi ^= d[d[xi]]\n    }\n  }\n\n  return {\n    SBOX: SBOX,\n    INV_SBOX: INV_SBOX,\n    SUB_MIX: SUB_MIX,\n    INV_SUB_MIX: INV_SUB_MIX\n  }\n})()\n\nfunction AES (key) {\n  this._key = asUInt32Array(key)\n  this._reset()\n}\n\nAES.blockSize = 4 * 4\nAES.keySize = 256 / 8\nAES.prototype.blockSize = AES.blockSize\nAES.prototype.keySize = AES.keySize\nAES.prototype._reset = function () {\n  var keyWords = this._key\n  var keySize = keyWords.length\n  var nRounds = keySize + 6\n  var ksRows = (nRounds + 1) * 4\n\n  var keySchedule = []\n  for (var k = 0; k < keySize; k++) {\n    keySchedule[k] = keyWords[k]\n  }\n\n  for (k = keySize; k < ksRows; k++) {\n    var t = keySchedule[k - 1]\n\n    if (k % keySize === 0) {\n      t = (t << 8) | (t >>> 24)\n      t =\n        (G.SBOX[t >>> 24] << 24) |\n        (G.SBOX[(t >>> 16) & 0xff] << 16) |\n        (G.SBOX[(t >>> 8) & 0xff] << 8) |\n        (G.SBOX[t & 0xff])\n\n      t ^= RCON[(k / keySize) | 0] << 24\n    } else if (keySize > 6 && k % keySize === 4) {\n      t =\n        (G.SBOX[t >>> 24] << 24) |\n        (G.SBOX[(t >>> 16) & 0xff] << 16) |\n        (G.SBOX[(t >>> 8) & 0xff] << 8) |\n        (G.SBOX[t & 0xff])\n    }\n\n    keySchedule[k] = keySchedule[k - keySize] ^ t\n  }\n\n  var invKeySchedule = []\n  for (var ik = 0; ik < ksRows; ik++) {\n    var ksR = ksRows - ik\n    var tt = keySchedule[ksR - (ik % 4 ? 0 : 4)]\n\n    if (ik < 4 || ksR <= 4) {\n      invKeySchedule[ik] = tt\n    } else {\n      invKeySchedule[ik] =\n        G.INV_SUB_MIX[0][G.SBOX[tt >>> 24]] ^\n        G.INV_SUB_MIX[1][G.SBOX[(tt >>> 16) & 0xff]] ^\n        G.INV_SUB_MIX[2][G.SBOX[(tt >>> 8) & 0xff]] ^\n        G.INV_SUB_MIX[3][G.SBOX[tt & 0xff]]\n    }\n  }\n\n  this._nRounds = nRounds\n  this._keySchedule = keySchedule\n  this._invKeySchedule = invKeySchedule\n}\n\nAES.prototype.encryptBlockRaw = function (M) {\n  M = asUInt32Array(M)\n  return cryptBlock(M, this._keySchedule, G.SUB_MIX, G.SBOX, this._nRounds)\n}\n\nAES.prototype.encryptBlock = function (M) {\n  var out = this.encryptBlockRaw(M)\n  var buf = Buffer.allocUnsafe(16)\n  buf.writeUInt32BE(out[0], 0)\n  buf.writeUInt32BE(out[1], 4)\n  buf.writeUInt32BE(out[2], 8)\n  buf.writeUInt32BE(out[3], 12)\n  return buf\n}\n\nAES.prototype.decryptBlock = function (M) {\n  M = asUInt32Array(M)\n\n  // swap\n  var m1 = M[1]\n  M[1] = M[3]\n  M[3] = m1\n\n  var out = cryptBlock(M, this._invKeySchedule, G.INV_SUB_MIX, G.INV_SBOX, this._nRounds)\n  var buf = Buffer.allocUnsafe(16)\n  buf.writeUInt32BE(out[0], 0)\n  buf.writeUInt32BE(out[3], 4)\n  buf.writeUInt32BE(out[2], 8)\n  buf.writeUInt32BE(out[1], 12)\n  return buf\n}\n\nAES.prototype.scrub = function () {\n  scrubVec(this._keySchedule)\n  scrubVec(this._invKeySchedule)\n  scrubVec(this._key)\n}\n\nmodule.exports.AES = AES\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// NOTE: These type checking functions intentionally don't use `instanceof`\n// because it is fragile and can be easily faked with `Object.create()`.\n\nfunction isArray(arg) {\n  if (Array.isArray) {\n    return Array.isArray(arg);\n  }\n  return objectToString(arg) === '[object Array]';\n}\nexports.isArray = isArray;\n\nfunction isBoolean(arg) {\n  return typeof arg === 'boolean';\n}\nexports.isBoolean = isBoolean;\n\nfunction isNull(arg) {\n  return arg === null;\n}\nexports.isNull = isNull;\n\nfunction isNullOrUndefined(arg) {\n  return arg == null;\n}\nexports.isNullOrUndefined = isNullOrUndefined;\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\nexports.isNumber = isNumber;\n\nfunction isString(arg) {\n  return typeof arg === 'string';\n}\nexports.isString = isString;\n\nfunction isSymbol(arg) {\n  return typeof arg === 'symbol';\n}\nexports.isSymbol = isSymbol;\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\nexports.isUndefined = isUndefined;\n\nfunction isRegExp(re) {\n  return objectToString(re) === '[object RegExp]';\n}\nexports.isRegExp = isRegExp;\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\nexports.isObject = isObject;\n\nfunction isDate(d) {\n  return objectToString(d) === '[object Date]';\n}\nexports.isDate = isDate;\n\nfunction isError(e) {\n  return (objectToString(e) === '[object Error]' || e instanceof Error);\n}\nexports.isError = isError;\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\nexports.isFunction = isFunction;\n\nfunction isPrimitive(arg) {\n  return arg === null ||\n         typeof arg === 'boolean' ||\n         typeof arg === 'number' ||\n         typeof arg === 'string' ||\n         typeof arg === 'symbol' ||  // ES6 symbol\n         typeof arg === 'undefined';\n}\nexports.isPrimitive = isPrimitive;\n\nexports.isBuffer = Buffer.isBuffer;\n\nfunction objectToString(o) {\n  return Object.prototype.toString.call(o);\n}\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n  if (!isObject(it) && it !== null) {\n    throw TypeError(\"Can't set \" + String(it) + ' as a prototype');\n  } return it;\n};\n","function _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}\n\nmodule.exports = _assertThisInitialized;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar STRING_ITERATOR = 'String Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(STRING_ITERATOR);\n\n// `String.prototype[@@iterator]` method\n// https://tc39.es/ecma262/#sec-string.prototype-@@iterator\ndefineIterator(String, 'String', function (iterated) {\n  setInternalState(this, {\n    type: STRING_ITERATOR,\n    string: String(iterated),\n    index: 0\n  });\n// `%StringIteratorPrototype%.next` method\n// https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next\n}, function next() {\n  var state = getInternalState(this);\n  var string = state.string;\n  var index = state.index;\n  var point;\n  if (index >= string.length) return { value: undefined, done: true };\n  point = charAt(string, index);\n  state.index += point.length;\n  return { value: point, done: false };\n});\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./evpkdf\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./enc-base64\", \"./md5\", \"./evpkdf\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var StreamCipher = C_lib.StreamCipher;\n\t    var C_algo = C.algo;\n\n\t    // Reusable objects\n\t    var S  = [];\n\t    var C_ = [];\n\t    var G  = [];\n\n\t    /**\n\t     * Rabbit stream cipher algorithm.\n\t     *\n\t     * This is a legacy version that neglected to convert the key to little-endian.\n\t     * This error doesn't affect the cipher's security,\n\t     * but it does affect its compatibility with other implementations.\n\t     */\n\t    var RabbitLegacy = C_algo.RabbitLegacy = StreamCipher.extend({\n\t        _doReset: function () {\n\t            // Shortcuts\n\t            var K = this._key.words;\n\t            var iv = this.cfg.iv;\n\n\t            // Generate initial state values\n\t            var X = this._X = [\n\t                K[0], (K[3] << 16) | (K[2] >>> 16),\n\t                K[1], (K[0] << 16) | (K[3] >>> 16),\n\t                K[2], (K[1] << 16) | (K[0] >>> 16),\n\t                K[3], (K[2] << 16) | (K[1] >>> 16)\n\t            ];\n\n\t            // Generate initial counter values\n\t            var C = this._C = [\n\t                (K[2] << 16) | (K[2] >>> 16), (K[0] & 0xffff0000) | (K[1] & 0x0000ffff),\n\t                (K[3] << 16) | (K[3] >>> 16), (K[1] & 0xffff0000) | (K[2] & 0x0000ffff),\n\t                (K[0] << 16) | (K[0] >>> 16), (K[2] & 0xffff0000) | (K[3] & 0x0000ffff),\n\t                (K[1] << 16) | (K[1] >>> 16), (K[3] & 0xffff0000) | (K[0] & 0x0000ffff)\n\t            ];\n\n\t            // Carry bit\n\t            this._b = 0;\n\n\t            // Iterate the system four times\n\t            for (var i = 0; i < 4; i++) {\n\t                nextState.call(this);\n\t            }\n\n\t            // Modify the counters\n\t            for (var i = 0; i < 8; i++) {\n\t                C[i] ^= X[(i + 4) & 7];\n\t            }\n\n\t            // IV setup\n\t            if (iv) {\n\t                // Shortcuts\n\t                var IV = iv.words;\n\t                var IV_0 = IV[0];\n\t                var IV_1 = IV[1];\n\n\t                // Generate four subvectors\n\t                var i0 = (((IV_0 << 8) | (IV_0 >>> 24)) & 0x00ff00ff) | (((IV_0 << 24) | (IV_0 >>> 8)) & 0xff00ff00);\n\t                var i2 = (((IV_1 << 8) | (IV_1 >>> 24)) & 0x00ff00ff) | (((IV_1 << 24) | (IV_1 >>> 8)) & 0xff00ff00);\n\t                var i1 = (i0 >>> 16) | (i2 & 0xffff0000);\n\t                var i3 = (i2 << 16)  | (i0 & 0x0000ffff);\n\n\t                // Modify counter values\n\t                C[0] ^= i0;\n\t                C[1] ^= i1;\n\t                C[2] ^= i2;\n\t                C[3] ^= i3;\n\t                C[4] ^= i0;\n\t                C[5] ^= i1;\n\t                C[6] ^= i2;\n\t                C[7] ^= i3;\n\n\t                // Iterate the system four times\n\t                for (var i = 0; i < 4; i++) {\n\t                    nextState.call(this);\n\t                }\n\t            }\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Shortcut\n\t            var X = this._X;\n\n\t            // Iterate the system\n\t            nextState.call(this);\n\n\t            // Generate four keystream words\n\t            S[0] = X[0] ^ (X[5] >>> 16) ^ (X[3] << 16);\n\t            S[1] = X[2] ^ (X[7] >>> 16) ^ (X[5] << 16);\n\t            S[2] = X[4] ^ (X[1] >>> 16) ^ (X[7] << 16);\n\t            S[3] = X[6] ^ (X[3] >>> 16) ^ (X[1] << 16);\n\n\t            for (var i = 0; i < 4; i++) {\n\t                // Swap endian\n\t                S[i] = (((S[i] << 8)  | (S[i] >>> 24)) & 0x00ff00ff) |\n\t                       (((S[i] << 24) | (S[i] >>> 8))  & 0xff00ff00);\n\n\t                // Encrypt\n\t                M[offset + i] ^= S[i];\n\t            }\n\t        },\n\n\t        blockSize: 128/32,\n\n\t        ivSize: 64/32\n\t    });\n\n\t    function nextState() {\n\t        // Shortcuts\n\t        var X = this._X;\n\t        var C = this._C;\n\n\t        // Save old counter values\n\t        for (var i = 0; i < 8; i++) {\n\t            C_[i] = C[i];\n\t        }\n\n\t        // Calculate new counter values\n\t        C[0] = (C[0] + 0x4d34d34d + this._b) | 0;\n\t        C[1] = (C[1] + 0xd34d34d3 + ((C[0] >>> 0) < (C_[0] >>> 0) ? 1 : 0)) | 0;\n\t        C[2] = (C[2] + 0x34d34d34 + ((C[1] >>> 0) < (C_[1] >>> 0) ? 1 : 0)) | 0;\n\t        C[3] = (C[3] + 0x4d34d34d + ((C[2] >>> 0) < (C_[2] >>> 0) ? 1 : 0)) | 0;\n\t        C[4] = (C[4] + 0xd34d34d3 + ((C[3] >>> 0) < (C_[3] >>> 0) ? 1 : 0)) | 0;\n\t        C[5] = (C[5] + 0x34d34d34 + ((C[4] >>> 0) < (C_[4] >>> 0) ? 1 : 0)) | 0;\n\t        C[6] = (C[6] + 0x4d34d34d + ((C[5] >>> 0) < (C_[5] >>> 0) ? 1 : 0)) | 0;\n\t        C[7] = (C[7] + 0xd34d34d3 + ((C[6] >>> 0) < (C_[6] >>> 0) ? 1 : 0)) | 0;\n\t        this._b = (C[7] >>> 0) < (C_[7] >>> 0) ? 1 : 0;\n\n\t        // Calculate the g-values\n\t        for (var i = 0; i < 8; i++) {\n\t            var gx = X[i] + C[i];\n\n\t            // Construct high and low argument for squaring\n\t            var ga = gx & 0xffff;\n\t            var gb = gx >>> 16;\n\n\t            // Calculate high and low result of squaring\n\t            var gh = ((((ga * ga) >>> 17) + ga * gb) >>> 15) + gb * gb;\n\t            var gl = (((gx & 0xffff0000) * gx) | 0) + (((gx & 0x0000ffff) * gx) | 0);\n\n\t            // High XOR low\n\t            G[i] = gh ^ gl;\n\t        }\n\n\t        // Calculate new state values\n\t        X[0] = (G[0] + ((G[7] << 16) | (G[7] >>> 16)) + ((G[6] << 16) | (G[6] >>> 16))) | 0;\n\t        X[1] = (G[1] + ((G[0] << 8)  | (G[0] >>> 24)) + G[7]) | 0;\n\t        X[2] = (G[2] + ((G[1] << 16) | (G[1] >>> 16)) + ((G[0] << 16) | (G[0] >>> 16))) | 0;\n\t        X[3] = (G[3] + ((G[2] << 8)  | (G[2] >>> 24)) + G[1]) | 0;\n\t        X[4] = (G[4] + ((G[3] << 16) | (G[3] >>> 16)) + ((G[2] << 16) | (G[2] >>> 16))) | 0;\n\t        X[5] = (G[5] + ((G[4] << 8)  | (G[4] >>> 24)) + G[3]) | 0;\n\t        X[6] = (G[6] + ((G[5] << 16) | (G[5] >>> 16)) + ((G[4] << 16) | (G[4] >>> 16))) | 0;\n\t        X[7] = (G[7] + ((G[6] << 8)  | (G[6] >>> 24)) + G[5]) | 0;\n\t    }\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.RabbitLegacy.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.RabbitLegacy.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.RabbitLegacy = StreamCipher._createHelper(RabbitLegacy);\n\t}());\n\n\n\treturn CryptoJS.RabbitLegacy;\n\n}));","export default function getVariation(placement) {\n  return placement.split('-')[1];\n}","'use strict';\n\nvar utils = require('../utils');\nvar BN = require('bn.js');\nvar inherits = require('inherits');\nvar Base = require('./base');\n\nvar assert = utils.assert;\n\nfunction EdwardsCurve(conf) {\n  // NOTE: Important as we are creating point in Base.call()\n  this.twisted = (conf.a | 0) !== 1;\n  this.mOneA = this.twisted && (conf.a | 0) === -1;\n  this.extended = this.mOneA;\n\n  Base.call(this, 'edwards', conf);\n\n  this.a = new BN(conf.a, 16).umod(this.red.m);\n  this.a = this.a.toRed(this.red);\n  this.c = new BN(conf.c, 16).toRed(this.red);\n  this.c2 = this.c.redSqr();\n  this.d = new BN(conf.d, 16).toRed(this.red);\n  this.dd = this.d.redAdd(this.d);\n\n  assert(!this.twisted || this.c.fromRed().cmpn(1) === 0);\n  this.oneC = (conf.c | 0) === 1;\n}\ninherits(EdwardsCurve, Base);\nmodule.exports = EdwardsCurve;\n\nEdwardsCurve.prototype._mulA = function _mulA(num) {\n  if (this.mOneA)\n    return num.redNeg();\n  else\n    return this.a.redMul(num);\n};\n\nEdwardsCurve.prototype._mulC = function _mulC(num) {\n  if (this.oneC)\n    return num;\n  else\n    return this.c.redMul(num);\n};\n\n// Just for compatibility with Short curve\nEdwardsCurve.prototype.jpoint = function jpoint(x, y, z, t) {\n  return this.point(x, y, z, t);\n};\n\nEdwardsCurve.prototype.pointFromX = function pointFromX(x, odd) {\n  x = new BN(x, 16);\n  if (!x.red)\n    x = x.toRed(this.red);\n\n  var x2 = x.redSqr();\n  var rhs = this.c2.redSub(this.a.redMul(x2));\n  var lhs = this.one.redSub(this.c2.redMul(this.d).redMul(x2));\n\n  var y2 = rhs.redMul(lhs.redInvm());\n  var y = y2.redSqrt();\n  if (y.redSqr().redSub(y2).cmp(this.zero) !== 0)\n    throw new Error('invalid point');\n\n  var isOdd = y.fromRed().isOdd();\n  if (odd && !isOdd || !odd && isOdd)\n    y = y.redNeg();\n\n  return this.point(x, y);\n};\n\nEdwardsCurve.prototype.pointFromY = function pointFromY(y, odd) {\n  y = new BN(y, 16);\n  if (!y.red)\n    y = y.toRed(this.red);\n\n  // x^2 = (y^2 - c^2) / (c^2 d y^2 - a)\n  var y2 = y.redSqr();\n  var lhs = y2.redSub(this.c2);\n  var rhs = y2.redMul(this.d).redMul(this.c2).redSub(this.a);\n  var x2 = lhs.redMul(rhs.redInvm());\n\n  if (x2.cmp(this.zero) === 0) {\n    if (odd)\n      throw new Error('invalid point');\n    else\n      return this.point(this.zero, y);\n  }\n\n  var x = x2.redSqrt();\n  if (x.redSqr().redSub(x2).cmp(this.zero) !== 0)\n    throw new Error('invalid point');\n\n  if (x.fromRed().isOdd() !== odd)\n    x = x.redNeg();\n\n  return this.point(x, y);\n};\n\nEdwardsCurve.prototype.validate = function validate(point) {\n  if (point.isInfinity())\n    return true;\n\n  // Curve: A * X^2 + Y^2 = C^2 * (1 + D * X^2 * Y^2)\n  point.normalize();\n\n  var x2 = point.x.redSqr();\n  var y2 = point.y.redSqr();\n  var lhs = x2.redMul(this.a).redAdd(y2);\n  var rhs = this.c2.redMul(this.one.redAdd(this.d.redMul(x2).redMul(y2)));\n\n  return lhs.cmp(rhs) === 0;\n};\n\nfunction Point(curve, x, y, z, t) {\n  Base.BasePoint.call(this, curve, 'projective');\n  if (x === null && y === null && z === null) {\n    this.x = this.curve.zero;\n    this.y = this.curve.one;\n    this.z = this.curve.one;\n    this.t = this.curve.zero;\n    this.zOne = true;\n  } else {\n    this.x = new BN(x, 16);\n    this.y = new BN(y, 16);\n    this.z = z ? new BN(z, 16) : this.curve.one;\n    this.t = t && new BN(t, 16);\n    if (!this.x.red)\n      this.x = this.x.toRed(this.curve.red);\n    if (!this.y.red)\n      this.y = this.y.toRed(this.curve.red);\n    if (!this.z.red)\n      this.z = this.z.toRed(this.curve.red);\n    if (this.t && !this.t.red)\n      this.t = this.t.toRed(this.curve.red);\n    this.zOne = this.z === this.curve.one;\n\n    // Use extended coordinates\n    if (this.curve.extended && !this.t) {\n      this.t = this.x.redMul(this.y);\n      if (!this.zOne)\n        this.t = this.t.redMul(this.z.redInvm());\n    }\n  }\n}\ninherits(Point, Base.BasePoint);\n\nEdwardsCurve.prototype.pointFromJSON = function pointFromJSON(obj) {\n  return Point.fromJSON(this, obj);\n};\n\nEdwardsCurve.prototype.point = function point(x, y, z, t) {\n  return new Point(this, x, y, z, t);\n};\n\nPoint.fromJSON = function fromJSON(curve, obj) {\n  return new Point(curve, obj[0], obj[1], obj[2]);\n};\n\nPoint.prototype.inspect = function inspect() {\n  if (this.isInfinity())\n    return '<EC Point Infinity>';\n  return '<EC Point x: ' + this.x.fromRed().toString(16, 2) +\n      ' y: ' + this.y.fromRed().toString(16, 2) +\n      ' z: ' + this.z.fromRed().toString(16, 2) + '>';\n};\n\nPoint.prototype.isInfinity = function isInfinity() {\n  // XXX This code assumes that zero is always zero in red\n  return this.x.cmpn(0) === 0 &&\n    (this.y.cmp(this.z) === 0 ||\n    (this.zOne && this.y.cmp(this.curve.c) === 0));\n};\n\nPoint.prototype._extDbl = function _extDbl() {\n  // hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html\n  //     #doubling-dbl-2008-hwcd\n  // 4M + 4S\n\n  // A = X1^2\n  var a = this.x.redSqr();\n  // B = Y1^2\n  var b = this.y.redSqr();\n  // C = 2 * Z1^2\n  var c = this.z.redSqr();\n  c = c.redIAdd(c);\n  // D = a * A\n  var d = this.curve._mulA(a);\n  // E = (X1 + Y1)^2 - A - B\n  var e = this.x.redAdd(this.y).redSqr().redISub(a).redISub(b);\n  // G = D + B\n  var g = d.redAdd(b);\n  // F = G - C\n  var f = g.redSub(c);\n  // H = D - B\n  var h = d.redSub(b);\n  // X3 = E * F\n  var nx = e.redMul(f);\n  // Y3 = G * H\n  var ny = g.redMul(h);\n  // T3 = E * H\n  var nt = e.redMul(h);\n  // Z3 = F * G\n  var nz = f.redMul(g);\n  return this.curve.point(nx, ny, nz, nt);\n};\n\nPoint.prototype._projDbl = function _projDbl() {\n  // hyperelliptic.org/EFD/g1p/auto-twisted-projective.html\n  //     #doubling-dbl-2008-bbjlp\n  //     #doubling-dbl-2007-bl\n  // and others\n  // Generally 3M + 4S or 2M + 4S\n\n  // B = (X1 + Y1)^2\n  var b = this.x.redAdd(this.y).redSqr();\n  // C = X1^2\n  var c = this.x.redSqr();\n  // D = Y1^2\n  var d = this.y.redSqr();\n\n  var nx;\n  var ny;\n  var nz;\n  var e;\n  var h;\n  var j;\n  if (this.curve.twisted) {\n    // E = a * C\n    e = this.curve._mulA(c);\n    // F = E + D\n    var f = e.redAdd(d);\n    if (this.zOne) {\n      // X3 = (B - C - D) * (F - 2)\n      nx = b.redSub(c).redSub(d).redMul(f.redSub(this.curve.two));\n      // Y3 = F * (E - D)\n      ny = f.redMul(e.redSub(d));\n      // Z3 = F^2 - 2 * F\n      nz = f.redSqr().redSub(f).redSub(f);\n    } else {\n      // H = Z1^2\n      h = this.z.redSqr();\n      // J = F - 2 * H\n      j = f.redSub(h).redISub(h);\n      // X3 = (B-C-D)*J\n      nx = b.redSub(c).redISub(d).redMul(j);\n      // Y3 = F * (E - D)\n      ny = f.redMul(e.redSub(d));\n      // Z3 = F * J\n      nz = f.redMul(j);\n    }\n  } else {\n    // E = C + D\n    e = c.redAdd(d);\n    // H = (c * Z1)^2\n    h = this.curve._mulC(this.z).redSqr();\n    // J = E - 2 * H\n    j = e.redSub(h).redSub(h);\n    // X3 = c * (B - E) * J\n    nx = this.curve._mulC(b.redISub(e)).redMul(j);\n    // Y3 = c * E * (C - D)\n    ny = this.curve._mulC(e).redMul(c.redISub(d));\n    // Z3 = E * J\n    nz = e.redMul(j);\n  }\n  return this.curve.point(nx, ny, nz);\n};\n\nPoint.prototype.dbl = function dbl() {\n  if (this.isInfinity())\n    return this;\n\n  // Double in extended coordinates\n  if (this.curve.extended)\n    return this._extDbl();\n  else\n    return this._projDbl();\n};\n\nPoint.prototype._extAdd = function _extAdd(p) {\n  // hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html\n  //     #addition-add-2008-hwcd-3\n  // 8M\n\n  // A = (Y1 - X1) * (Y2 - X2)\n  var a = this.y.redSub(this.x).redMul(p.y.redSub(p.x));\n  // B = (Y1 + X1) * (Y2 + X2)\n  var b = this.y.redAdd(this.x).redMul(p.y.redAdd(p.x));\n  // C = T1 * k * T2\n  var c = this.t.redMul(this.curve.dd).redMul(p.t);\n  // D = Z1 * 2 * Z2\n  var d = this.z.redMul(p.z.redAdd(p.z));\n  // E = B - A\n  var e = b.redSub(a);\n  // F = D - C\n  var f = d.redSub(c);\n  // G = D + C\n  var g = d.redAdd(c);\n  // H = B + A\n  var h = b.redAdd(a);\n  // X3 = E * F\n  var nx = e.redMul(f);\n  // Y3 = G * H\n  var ny = g.redMul(h);\n  // T3 = E * H\n  var nt = e.redMul(h);\n  // Z3 = F * G\n  var nz = f.redMul(g);\n  return this.curve.point(nx, ny, nz, nt);\n};\n\nPoint.prototype._projAdd = function _projAdd(p) {\n  // hyperelliptic.org/EFD/g1p/auto-twisted-projective.html\n  //     #addition-add-2008-bbjlp\n  //     #addition-add-2007-bl\n  // 10M + 1S\n\n  // A = Z1 * Z2\n  var a = this.z.redMul(p.z);\n  // B = A^2\n  var b = a.redSqr();\n  // C = X1 * X2\n  var c = this.x.redMul(p.x);\n  // D = Y1 * Y2\n  var d = this.y.redMul(p.y);\n  // E = d * C * D\n  var e = this.curve.d.redMul(c).redMul(d);\n  // F = B - E\n  var f = b.redSub(e);\n  // G = B + E\n  var g = b.redAdd(e);\n  // X3 = A * F * ((X1 + Y1) * (X2 + Y2) - C - D)\n  var tmp = this.x.redAdd(this.y).redMul(p.x.redAdd(p.y)).redISub(c).redISub(d);\n  var nx = a.redMul(f).redMul(tmp);\n  var ny;\n  var nz;\n  if (this.curve.twisted) {\n    // Y3 = A * G * (D - a * C)\n    ny = a.redMul(g).redMul(d.redSub(this.curve._mulA(c)));\n    // Z3 = F * G\n    nz = f.redMul(g);\n  } else {\n    // Y3 = A * G * (D - C)\n    ny = a.redMul(g).redMul(d.redSub(c));\n    // Z3 = c * F * G\n    nz = this.curve._mulC(f).redMul(g);\n  }\n  return this.curve.point(nx, ny, nz);\n};\n\nPoint.prototype.add = function add(p) {\n  if (this.isInfinity())\n    return p;\n  if (p.isInfinity())\n    return this;\n\n  if (this.curve.extended)\n    return this._extAdd(p);\n  else\n    return this._projAdd(p);\n};\n\nPoint.prototype.mul = function mul(k) {\n  if (this._hasDoubles(k))\n    return this.curve._fixedNafMul(this, k);\n  else\n    return this.curve._wnafMul(this, k);\n};\n\nPoint.prototype.mulAdd = function mulAdd(k1, p, k2) {\n  return this.curve._wnafMulAdd(1, [ this, p ], [ k1, k2 ], 2, false);\n};\n\nPoint.prototype.jmulAdd = function jmulAdd(k1, p, k2) {\n  return this.curve._wnafMulAdd(1, [ this, p ], [ k1, k2 ], 2, true);\n};\n\nPoint.prototype.normalize = function normalize() {\n  if (this.zOne)\n    return this;\n\n  // Normalize coordinates\n  var zi = this.z.redInvm();\n  this.x = this.x.redMul(zi);\n  this.y = this.y.redMul(zi);\n  if (this.t)\n    this.t = this.t.redMul(zi);\n  this.z = this.curve.one;\n  this.zOne = true;\n  return this;\n};\n\nPoint.prototype.neg = function neg() {\n  return this.curve.point(this.x.redNeg(),\n    this.y,\n    this.z,\n    this.t && this.t.redNeg());\n};\n\nPoint.prototype.getX = function getX() {\n  this.normalize();\n  return this.x.fromRed();\n};\n\nPoint.prototype.getY = function getY() {\n  this.normalize();\n  return this.y.fromRed();\n};\n\nPoint.prototype.eq = function eq(other) {\n  return this === other ||\n         this.getX().cmp(other.getX()) === 0 &&\n         this.getY().cmp(other.getY()) === 0;\n};\n\nPoint.prototype.eqXToP = function eqXToP(x) {\n  var rx = x.toRed(this.curve.red).redMul(this.z);\n  if (this.x.cmp(rx) === 0)\n    return true;\n\n  var xc = x.clone();\n  var t = this.curve.redN.redMul(this.z);\n  for (;;) {\n    xc.iadd(this.curve.n);\n    if (xc.cmp(this.curve.p) >= 0)\n      return false;\n\n    rx.redIAdd(t);\n    if (this.x.cmp(rx) === 0)\n      return true;\n  }\n};\n\n// Compatibility with BaseCurve\nPoint.prototype.toP = Point.prototype.normalize;\nPoint.prototype.mixedAdd = Point.prototype.add;\n","/**\n * mux.js\n *\n * Copyright (c) 2014 Brightcove\n * All rights reserved.\n *\n * A lightweight readable stream implemention that handles event dispatching.\n * Objects that inherit from streams should call init in their constructors.\n */\n'use strict';\n\nvar Stream = function() {\n  this.init = function() {\n    var listeners = {};\n    /**\n     * Add a listener for a specified event type.\n     * @param type {string} the event name\n     * @param listener {function} the callback to be invoked when an event of\n     * the specified type occurs\n     */\n    this.on = function(type, listener) {\n      if (!listeners[type]) {\n        listeners[type] = [];\n      }\n      listeners[type] = listeners[type].concat(listener);\n    };\n    /**\n     * Remove a listener for a specified event type.\n     * @param type {string} the event name\n     * @param listener {function} a function previously registered for this\n     * type of event through `on`\n     */\n    this.off = function(type, listener) {\n      var index;\n      if (!listeners[type]) {\n        return false;\n      }\n      index = listeners[type].indexOf(listener);\n      listeners[type] = listeners[type].slice();\n      listeners[type].splice(index, 1);\n      return index > -1;\n    };\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     * @param type {string} the event name\n     */\n    this.trigger = function(type) {\n      var callbacks, i, length, args;\n      callbacks = listeners[type];\n      if (!callbacks) {\n        return;\n      }\n      // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n      if (arguments.length === 2) {\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        args = [];\n        i = arguments.length;\n        for (i = 1; i < arguments.length; ++i) {\n          args.push(arguments[i]);\n        }\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].apply(this, args);\n        }\n      }\n    };\n    /**\n     * Destroys the stream and cleans up.\n     */\n    this.dispose = function() {\n      listeners = {};\n    };\n  };\n};\n\n/**\n * Forwards all `data` events on this stream to the destination stream. The\n * destination stream should provide a method `push` to receive the data\n * events as they arrive.\n * @param destination {stream} the stream that will receive all `data` events\n * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n *                            when the current stream emits a 'done' event\n * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n */\nStream.prototype.pipe = function(destination) {\n  this.on('data', function(data) {\n    destination.push(data);\n  });\n\n  this.on('done', function(flushSource) {\n    destination.flush(flushSource);\n  });\n\n  return destination;\n};\n\n// Default stream functions that are expected to be overridden to perform\n// actual work. These are provided by the prototype as a sort of no-op\n// implementation so that we don't have to check for their existence in the\n// `pipe` function above.\nStream.prototype.push = function(data) {\n  this.trigger('data', data);\n};\n\nStream.prototype.flush = function(flushSource) {\n  this.trigger('done', flushSource);\n};\n\nmodule.exports = Stream;\n","import { getTarget, getDevtoolsGlobalHook, isProxyAvailable } from './env';\nimport { HOOK_SETUP } from './const';\nimport { ApiProxy } from './proxy';\nexport * from './api';\nexport * from './plugin';\nexport function setupDevtoolsPlugin(pluginDescriptor, setupFn) {\n    const target = getTarget();\n    const hook = getDevtoolsGlobalHook();\n    const enableProxy = isProxyAvailable && pluginDescriptor.enableEarlyProxy;\n    if (hook && (target.__VUE_DEVTOOLS_PLUGIN_API_AVAILABLE__ || !enableProxy)) {\n        hook.emit(HOOK_SETUP, pluginDescriptor, setupFn);\n    }\n    else {\n        const proxy = enableProxy ? new ApiProxy(pluginDescriptor, hook) : null;\n        const list = target.__VUE_DEVTOOLS_PLUGINS__ = target.__VUE_DEVTOOLS_PLUGINS__ || [];\n        list.push({\n            pluginDescriptor,\n            setupFn,\n            proxy\n        });\n        if (proxy)\n            setupFn(proxy.proxiedTarget);\n    }\n}\n","var Buffer = require('safe-buffer').Buffer\nvar ZEROES = Buffer.alloc(16, 0)\n\nfunction toArray (buf) {\n  return [\n    buf.readUInt32BE(0),\n    buf.readUInt32BE(4),\n    buf.readUInt32BE(8),\n    buf.readUInt32BE(12)\n  ]\n}\n\nfunction fromArray (out) {\n  var buf = Buffer.allocUnsafe(16)\n  buf.writeUInt32BE(out[0] >>> 0, 0)\n  buf.writeUInt32BE(out[1] >>> 0, 4)\n  buf.writeUInt32BE(out[2] >>> 0, 8)\n  buf.writeUInt32BE(out[3] >>> 0, 12)\n  return buf\n}\n\nfunction GHASH (key) {\n  this.h = key\n  this.state = Buffer.alloc(16, 0)\n  this.cache = Buffer.allocUnsafe(0)\n}\n\n// from http://bitwiseshiftleft.github.io/sjcl/doc/symbols/src/core_gcm.js.html\n// by Juho Vähä-Herttua\nGHASH.prototype.ghash = function (block) {\n  var i = -1\n  while (++i < block.length) {\n    this.state[i] ^= block[i]\n  }\n  this._multiply()\n}\n\nGHASH.prototype._multiply = function () {\n  var Vi = toArray(this.h)\n  var Zi = [0, 0, 0, 0]\n  var j, xi, lsbVi\n  var i = -1\n  while (++i < 128) {\n    xi = (this.state[~~(i / 8)] & (1 << (7 - (i % 8)))) !== 0\n    if (xi) {\n      // Z_i+1 = Z_i ^ V_i\n      Zi[0] ^= Vi[0]\n      Zi[1] ^= Vi[1]\n      Zi[2] ^= Vi[2]\n      Zi[3] ^= Vi[3]\n    }\n\n    // Store the value of LSB(V_i)\n    lsbVi = (Vi[3] & 1) !== 0\n\n    // V_i+1 = V_i >> 1\n    for (j = 3; j > 0; j--) {\n      Vi[j] = (Vi[j] >>> 1) | ((Vi[j - 1] & 1) << 31)\n    }\n    Vi[0] = Vi[0] >>> 1\n\n    // If LSB(V_i) is 1, V_i+1 = (V_i >> 1) ^ R\n    if (lsbVi) {\n      Vi[0] = Vi[0] ^ (0xe1 << 24)\n    }\n  }\n  this.state = fromArray(Zi)\n}\n\nGHASH.prototype.update = function (buf) {\n  this.cache = Buffer.concat([this.cache, buf])\n  var chunk\n  while (this.cache.length >= 16) {\n    chunk = this.cache.slice(0, 16)\n    this.cache = this.cache.slice(16)\n    this.ghash(chunk)\n  }\n}\n\nGHASH.prototype.final = function (abl, bl) {\n  if (this.cache.length) {\n    this.ghash(Buffer.concat([this.cache, ZEROES], 16))\n  }\n\n  this.ghash(fromArray([0, abl, 0, bl]))\n  return this.state\n}\n\nmodule.exports = GHASH\n","module.exports = {};\n","if (typeof Object.create === 'function') {\n  // implementation from standard node.js 'util' module\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor\n      ctor.prototype = Object.create(superCtor.prototype, {\n        constructor: {\n          value: ctor,\n          enumerable: false,\n          writable: true,\n          configurable: true\n        }\n      })\n    }\n  };\n} else {\n  // old school shim for old browsers\n  module.exports = function inherits(ctor, superCtor) {\n    if (superCtor) {\n      ctor.super_ = superCtor\n      var TempCtor = function () {}\n      TempCtor.prototype = superCtor.prototype\n      ctor.prototype = new TempCtor()\n      ctor.prototype.constructor = ctor\n    }\n  }\n}\n","module.exports = {\n  doubles: {\n    step: 4,\n    points: [\n      [\n        'e60fce93b59e9ec53011aabc21c23e97b2a31369b87a5ae9c44ee89e2a6dec0a',\n        'f7e3507399e595929db99f34f57937101296891e44d23f0be1f32cce69616821',\n      ],\n      [\n        '8282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508',\n        '11f8a8098557dfe45e8256e830b60ace62d613ac2f7b17bed31b6eaff6e26caf',\n      ],\n      [\n        '175e159f728b865a72f99cc6c6fc846de0b93833fd2222ed73fce5b551e5b739',\n        'd3506e0d9e3c79eba4ef97a51ff71f5eacb5955add24345c6efa6ffee9fed695',\n      ],\n      [\n        '363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640',\n        '4e273adfc732221953b445397f3363145b9a89008199ecb62003c7f3bee9de9',\n      ],\n      [\n        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= RSAPublicKey\n\nvar PublicKey = asn1.define('SubjectPublicKeyInfo', function () {\n  this.seq().obj(\n    this.key('algorithm').use(AlgorithmIdentifier),\n    this.key('subjectPublicKey').bitstr()\n  )\n})\nexports.PublicKey = PublicKey\n\nvar AlgorithmIdentifier = asn1.define('AlgorithmIdentifier', function () {\n  this.seq().obj(\n    this.key('algorithm').objid(),\n    this.key('none').null_().optional(),\n    this.key('curve').objid().optional(),\n    this.key('params').seq().obj(\n      this.key('p').int(),\n      this.key('q').int(),\n      this.key('g').int()\n    ).optional()\n  )\n})\n\nvar PrivateKeyInfo = asn1.define('PrivateKeyInfo', function () {\n  this.seq().obj(\n    this.key('version').int(),\n    this.key('algorithm').use(AlgorithmIdentifier),\n    this.key('subjectPrivateKey').octstr()\n  )\n})\nexports.PrivateKey = PrivateKeyInfo\nvar EncryptedPrivateKeyInfo = asn1.define('EncryptedPrivateKeyInfo', function () {\n  this.seq().obj(\n    this.key('algorithm').seq().obj(\n      this.key('id').objid(),\n      this.key('decrypt').seq().obj(\n        this.key('kde').seq().obj(\n          this.key('id').objid(),\n          this.key('kdeparams').seq().obj(\n            this.key('salt').octstr(),\n            this.key('iters').int()\n          )\n        ),\n        this.key('cipher').seq().obj(\n          this.key('algo').objid(),\n          this.key('iv').octstr()\n        )\n      )\n    ),\n    this.key('subjectPrivateKey').octstr()\n  )\n})\n\nexports.EncryptedPrivateKey = EncryptedPrivateKeyInfo\n\nvar DSAPrivateKey = asn1.define('DSAPrivateKey', function () {\n  this.seq().obj(\n    this.key('version').int(),\n    this.key('p').int(),\n    this.key('q').int(),\n    this.key('g').int(),\n    this.key('pub_key').int(),\n    this.key('priv_key').int()\n  )\n})\nexports.DSAPrivateKey = DSAPrivateKey\n\nexports.DSAparam = asn1.define('DSAparam', function () {\n  this.int()\n})\n\nvar ECPrivateKey = asn1.define('ECPrivateKey', function () {\n  this.seq().obj(\n    this.key('version').int(),\n    this.key('privateKey').octstr(),\n    this.key('parameters').optional().explicit(0).use(ECParameters),\n    this.key('publicKey').optional().explicit(1).bitstr()\n  )\n})\nexports.ECPrivateKey = ECPrivateKey\n\nvar ECParameters = asn1.define('ECParameters', function () {\n  this.choice({\n    namedCurve: this.objid()\n  })\n})\n\nexports.signature = asn1.define('signature', function () {\n  this.seq().obj(\n    this.key('r').int(),\n    this.key('s').int()\n  )\n})\n","'use strict';\n\nvar curve = exports;\n\ncurve.base = require('./base');\ncurve.short = require('./short');\ncurve.mont = require('./mont');\ncurve.edwards = require('./edwards');\n","'use strict';\n\nvar _Object$setPrototypeO;\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nvar finished = require('./end-of-stream');\n\nvar kLastResolve = Symbol('lastResolve');\nvar kLastReject = Symbol('lastReject');\nvar kError = Symbol('error');\nvar kEnded = Symbol('ended');\nvar kLastPromise = Symbol('lastPromise');\nvar kHandlePromise = Symbol('handlePromise');\nvar kStream = Symbol('stream');\n\nfunction createIterResult(value, done) {\n  return {\n    value: value,\n    done: done\n  };\n}\n\nfunction readAndResolve(iter) {\n  var resolve = iter[kLastResolve];\n\n  if (resolve !== null) {\n    var data = iter[kStream].read(); // we defer if data is null\n    // we can be expecting either 'end' or\n    // 'error'\n\n    if (data !== null) {\n      iter[kLastPromise] = null;\n      iter[kLastResolve] = null;\n      iter[kLastReject] = null;\n      resolve(createIterResult(data, false));\n    }\n  }\n}\n\nfunction onReadable(iter) {\n  // we wait for the next tick, because it might\n  // emit an error with process.nextTick\n  process.nextTick(readAndResolve, iter);\n}\n\nfunction wrapForNext(lastPromise, iter) {\n  return function (resolve, reject) {\n    lastPromise.then(function () {\n      if (iter[kEnded]) {\n        resolve(createIterResult(undefined, true));\n        return;\n      }\n\n      iter[kHandlePromise](resolve, reject);\n    }, reject);\n  };\n}\n\nvar AsyncIteratorPrototype = Object.getPrototypeOf(function () {});\nvar ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {\n  get stream() {\n    return this[kStream];\n  },\n\n  next: function next() {\n    var _this = this;\n\n    // if we have detected an error in the meanwhile\n    // reject straight away\n    var error = this[kError];\n\n    if (error !== null) {\n      return Promise.reject(error);\n    }\n\n    if (this[kEnded]) {\n      return Promise.resolve(createIterResult(undefined, true));\n    }\n\n    if (this[kStream].destroyed) {\n      // We need to defer via nextTick because if .destroy(err) is\n      // called, the error will be emitted via nextTick, and\n      // we cannot guarantee that there is no error lingering around\n      // waiting to be emitted.\n      return new Promise(function (resolve, reject) {\n        process.nextTick(function () {\n          if (_this[kError]) {\n            reject(_this[kError]);\n          } else {\n            resolve(createIterResult(undefined, true));\n          }\n        });\n      });\n    } // if we have multiple next() calls\n    // we will wait for the previous Promise to finish\n    // this logic is optimized to support for await loops,\n    // where next() is only called once at a time\n\n\n    var lastPromise = this[kLastPromise];\n    var promise;\n\n    if (lastPromise) {\n      promise = new Promise(wrapForNext(lastPromise, this));\n    } else {\n      // fast path needed to support multiple this.push()\n      // without triggering the next() queue\n      var data = this[kStream].read();\n\n      if (data !== null) {\n        return Promise.resolve(createIterResult(data, false));\n      }\n\n      promise = new Promise(this[kHandlePromise]);\n    }\n\n    this[kLastPromise] = promise;\n    return promise;\n  }\n}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {\n  return this;\n}), _defineProperty(_Object$setPrototypeO, \"return\", function _return() {\n  var _this2 = this;\n\n  // destroy(err, cb) is a private API\n  // we can guarantee we have that here, because we control the\n  // Readable class this is attached to\n  return new Promise(function (resolve, reject) {\n    _this2[kStream].destroy(null, function (err) {\n      if (err) {\n        reject(err);\n        return;\n      }\n\n      resolve(createIterResult(undefined, true));\n    });\n  });\n}), _Object$setPrototypeO), AsyncIteratorPrototype);\n\nvar createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {\n  var _Object$create;\n\n  var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {\n    value: stream,\n    writable: true\n  }), _defineProperty(_Object$create, kLastResolve, {\n    value: null,\n    writable: true\n  }), _defineProperty(_Object$create, kLastReject, {\n    value: null,\n    writable: true\n  }), _defineProperty(_Object$create, kError, {\n    value: null,\n    writable: true\n  }), _defineProperty(_Object$create, kEnded, {\n    value: stream._readableState.endEmitted,\n    writable: true\n  }), _defineProperty(_Object$create, kHandlePromise, {\n    value: function value(resolve, reject) {\n      var data = iterator[kStream].read();\n\n      if (data) {\n        iterator[kLastPromise] = null;\n        iterator[kLastResolve] = null;\n        iterator[kLastReject] = null;\n        resolve(createIterResult(data, false));\n      } else {\n        iterator[kLastResolve] = resolve;\n        iterator[kLastReject] = reject;\n      }\n    },\n    writable: true\n  }), _Object$create));\n  iterator[kLastPromise] = null;\n  finished(stream, function (err) {\n    if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {\n      var reject = iterator[kLastReject]; // reject if we are waiting for data in the Promise\n      // returned by next() and store the error\n\n      if (reject !== null) {\n        iterator[kLastPromise] = null;\n        iterator[kLastResolve] = null;\n        iterator[kLastReject] = null;\n        reject(err);\n      }\n\n      iterator[kError] = err;\n      return;\n    }\n\n    var resolve = iterator[kLastResolve];\n\n    if (resolve !== null) {\n      iterator[kLastPromise] = null;\n      iterator[kLastResolve] = null;\n      iterator[kLastReject] = null;\n      resolve(createIterResult(undefined, true));\n    }\n\n    iterator[kEnded] = true;\n  });\n  stream.on('readable', onReadable.bind(null, iterator));\n  return iterator;\n};\n\nmodule.exports = createReadableStreamAsyncIterator;","'use strict';\n\nconst base = exports;\n\nbase.Reporter = require('./reporter').Reporter;\nbase.DecoderBuffer = require('./buffer').DecoderBuffer;\nbase.EncoderBuffer = require('./buffer').EncoderBuffer;\nbase.Node = require('./node');\n","var AuthCipher = require('./authCipher')\nvar Buffer = require('safe-buffer').Buffer\nvar MODES = require('./modes')\nvar StreamCipher = require('./streamCipher')\nvar Transform = require('cipher-base')\nvar aes = require('./aes')\nvar ebtk = require('evp_bytestokey')\nvar inherits = require('inherits')\n\nfunction Decipher (mode, key, iv) {\n  Transform.call(this)\n\n  this._cache = new Splitter()\n  this._last = void 0\n  this._cipher = new aes.AES(key)\n  this._prev = Buffer.from(iv)\n  this._mode = mode\n  this._autopadding = true\n}\n\ninherits(Decipher, Transform)\n\nDecipher.prototype._update = function (data) {\n  this._cache.add(data)\n  var chunk\n  var thing\n  var out = []\n  while ((chunk = this._cache.get(this._autopadding))) {\n    thing = this._mode.decrypt(this, chunk)\n    out.push(thing)\n  }\n  return Buffer.concat(out)\n}\n\nDecipher.prototype._final = function () {\n  var chunk = this._cache.flush()\n  if (this._autopadding) {\n    return unpad(this._mode.decrypt(this, chunk))\n  } else if (chunk) {\n    throw new Error('data not multiple of block length')\n  }\n}\n\nDecipher.prototype.setAutoPadding = function (setTo) {\n  this._autopadding = !!setTo\n  return this\n}\n\nfunction Splitter () {\n  this.cache = Buffer.allocUnsafe(0)\n}\n\nSplitter.prototype.add = function (data) {\n  this.cache = Buffer.concat([this.cache, data])\n}\n\nSplitter.prototype.get = function (autoPadding) {\n  var out\n  if (autoPadding) {\n    if (this.cache.length > 16) {\n      out = this.cache.slice(0, 16)\n      this.cache = this.cache.slice(16)\n      return out\n    }\n  } else {\n    if (this.cache.length >= 16) {\n      out = this.cache.slice(0, 16)\n      this.cache = this.cache.slice(16)\n      return out\n    }\n  }\n\n  return null\n}\n\nSplitter.prototype.flush = function () {\n  if (this.cache.length) return this.cache\n}\n\nfunction unpad (last) {\n  var padded = last[15]\n  if (padded < 1 || padded > 16) {\n    throw new Error('unable to decrypt data')\n  }\n  var i = -1\n  while (++i < padded) {\n    if (last[(i + (16 - padded))] !== padded) {\n      throw new Error('unable to decrypt data')\n    }\n  }\n  if (padded === 16) return\n\n  return last.slice(0, 16 - padded)\n}\n\nfunction createDecipheriv (suite, password, iv) {\n  var config = MODES[suite.toLowerCase()]\n  if (!config) throw new TypeError('invalid suite type')\n\n  if (typeof iv === 'string') iv = Buffer.from(iv)\n  if (config.mode !== 'GCM' && iv.length !== config.iv) throw new TypeError('invalid iv length ' + iv.length)\n\n  if (typeof password === 'string') password = Buffer.from(password)\n  if (password.length !== config.key / 8) throw new TypeError('invalid key length ' + password.length)\n\n  if (config.type === 'stream') {\n    return new StreamCipher(config.module, password, iv, true)\n  } else if (config.type === 'auth') {\n    return new AuthCipher(config.module, password, iv, true)\n  }\n\n  return new Decipher(config.module, password, iv)\n}\n\nfunction createDecipher (suite, password) {\n  var config = MODES[suite.toLowerCase()]\n  if (!config) throw new TypeError('invalid suite type')\n\n  var keys = ebtk(password, false, config.key, config.iv)\n  return createDecipheriv(suite, keys.key, keys.iv)\n}\n\nexports.createDecipher = createDecipher\nexports.createDecipheriv = createDecipheriv\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n'use strict';\n\nmodule.exports = Readable;\n/*<replacement>*/\n\nvar Duplex;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n/*<replacement>*/\n\nvar EE = require('events').EventEmitter;\n\nvar EElistenerCount = function EElistenerCount(emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n/*<replacement>*/\n\n\nvar Stream = require('./internal/streams/stream');\n/*</replacement>*/\n\n\nvar Buffer = require('buffer').Buffer;\n\nvar OurUint8Array = global.Uint8Array || function () {};\n\nfunction _uint8ArrayToBuffer(chunk) {\n  return Buffer.from(chunk);\n}\n\nfunction _isUint8Array(obj) {\n  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n/*<replacement>*/\n\n\nvar debugUtil = require('util');\n\nvar debug;\n\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function debug() {};\n}\n/*</replacement>*/\n\n\nvar BufferList = require('./internal/streams/buffer_list');\n\nvar destroyImpl = require('./internal/streams/destroy');\n\nvar _require = require('./internal/streams/state'),\n    getHighWaterMark = _require.getHighWaterMark;\n\nvar _require$codes = require('../errors').codes,\n    ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,\n    ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,\n    ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,\n    ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT; // Lazy loaded to improve the startup performance.\n\n\nvar StringDecoder;\nvar createReadableStreamAsyncIterator;\nvar from;\n\nrequire('inherits')(Readable, Stream);\n\nvar errorOrDestroy = destroyImpl.errorOrDestroy;\nvar kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];\n\nfunction prependListener(emitter, event, fn) {\n  // Sadly this is not cacheable as some libraries bundle their own\n  // event emitter implementation with them.\n  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn); // This is a hack to make sure that our error handler is attached before any\n  // userland ones.  NEVER DO THIS. This is here only because this code needs\n  // to continue to work with older versions of Node.js that do not include\n  // the prependListener() method. The goal is to eventually remove this hack.\n\n  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];\n}\n\nfunction ReadableState(options, stream, isDuplex) {\n  Duplex = Duplex || require('./_stream_duplex');\n  options = options || {}; // Duplex streams are both readable and writable, but share\n  // the same options object.\n  // However, some cases require setting options to different\n  // values for the readable and the writable sides of the duplex stream.\n  // These options can be provided separately as readableXXX and writableXXX.\n\n  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n\n  this.objectMode = !!options.objectMode;\n  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode; // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n\n  this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex); // A linked list is used to store data chunks instead of an array because the\n  // linked list can remove elements from the beginning faster than\n  // array.shift()\n\n  this.buffer = new BufferList();\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false; // a flag to be able to tell if the event 'readable'/'data' is emitted\n  // immediately, or on a later tick.  We set this to true at first, because\n  // any actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first read call.\n\n  this.sync = true; // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n  this.resumeScheduled = false;\n  this.paused = true; // Should close be emitted on destroy. Defaults to true.\n\n  this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'end' (and potentially 'finish')\n\n  this.autoDestroy = !!options.autoDestroy; // has it been destroyed\n\n  this.destroyed = false; // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n\n  this.defaultEncoding = options.defaultEncoding || 'utf8'; // the number of writers that are awaiting a drain event in .pipe()s\n\n  this.awaitDrain = 0; // if true, a maybeReadMore has been scheduled\n\n  this.readingMore = false;\n  this.decoder = null;\n  this.encoding = null;\n\n  if (options.encoding) {\n    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nfunction Readable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n  if (!(this instanceof Readable)) return new Readable(options); // Checking for a Stream.Duplex instance is faster here instead of inside\n  // the ReadableState constructor, at least with V8 6.5\n\n  var isDuplex = this instanceof Duplex;\n  this._readableState = new ReadableState(options, this, isDuplex); // legacy\n\n  this.readable = true;\n\n  if (options) {\n    if (typeof options.read === 'function') this._read = options.read;\n    if (typeof options.destroy === 'function') this._destroy = options.destroy;\n  }\n\n  Stream.call(this);\n}\n\nObject.defineProperty(Readable.prototype, 'destroyed', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    if (this._readableState === undefined) {\n      return false;\n    }\n\n    return this._readableState.destroyed;\n  },\n  set: function set(value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (!this._readableState) {\n      return;\n    } // backward compatibility, the user is explicitly\n    // managing destroyed\n\n\n    this._readableState.destroyed = value;\n  }\n});\nReadable.prototype.destroy = destroyImpl.destroy;\nReadable.prototype._undestroy = destroyImpl.undestroy;\n\nReadable.prototype._destroy = function (err, cb) {\n  cb(err);\n}; // Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\n\n\nReadable.prototype.push = function (chunk, encoding) {\n  var state = this._readableState;\n  var skipChunkCheck;\n\n  if (!state.objectMode) {\n    if (typeof chunk === 'string') {\n      encoding = encoding || state.defaultEncoding;\n\n      if (encoding !== state.encoding) {\n        chunk = Buffer.from(chunk, encoding);\n        encoding = '';\n      }\n\n      skipChunkCheck = true;\n    }\n  } else {\n    skipChunkCheck = true;\n  }\n\n  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);\n}; // Unshift should *always* be something directly out of read()\n\n\nReadable.prototype.unshift = function (chunk) {\n  return readableAddChunk(this, chunk, null, true, false);\n};\n\nfunction readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {\n  debug('readableAddChunk', chunk);\n  var state = stream._readableState;\n\n  if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else {\n    var er;\n    if (!skipChunkCheck) er = chunkInvalid(state, chunk);\n\n    if (er) {\n      errorOrDestroy(stream, er);\n    } else if (state.objectMode || chunk && chunk.length > 0) {\n      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {\n        chunk = _uint8ArrayToBuffer(chunk);\n      }\n\n      if (addToFront) {\n        if (state.endEmitted) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);\n      } else if (state.ended) {\n        errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF());\n      } else if (state.destroyed) {\n        return false;\n      } else {\n        state.reading = false;\n\n        if (state.decoder && !encoding) {\n          chunk = state.decoder.write(chunk);\n          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);\n        } else {\n          addChunk(stream, state, chunk, false);\n        }\n      }\n    } else if (!addToFront) {\n      state.reading = false;\n      maybeReadMore(stream, state);\n    }\n  } // We can push more data if we are below the highWaterMark.\n  // Also, if we have no data yet, we can stand some more bytes.\n  // This is to work around cases where hwm=0, such as the repl.\n\n\n  return !state.ended && (state.length < state.highWaterMark || state.length === 0);\n}\n\nfunction addChunk(stream, state, chunk, addToFront) {\n  if (state.flowing && state.length === 0 && !state.sync) {\n    state.awaitDrain = 0;\n    stream.emit('data', chunk);\n  } else {\n    // update the buffer info.\n    state.length += state.objectMode ? 1 : chunk.length;\n    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);\n    if (state.needReadable) emitReadable(stream);\n  }\n\n  maybeReadMore(stream, state);\n}\n\nfunction chunkInvalid(state, chunk) {\n  var er;\n\n  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {\n    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);\n  }\n\n  return er;\n}\n\nReadable.prototype.isPaused = function () {\n  return this._readableState.flowing === false;\n}; // backwards compatibility.\n\n\nReadable.prototype.setEncoding = function (enc) {\n  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n  var decoder = new StringDecoder(enc);\n  this._readableState.decoder = decoder; // If setEncoding(null), decoder.encoding equals utf8\n\n  this._readableState.encoding = this._readableState.decoder.encoding; // Iterate over current buffer to convert already stored Buffers:\n\n  var p = this._readableState.buffer.head;\n  var content = '';\n\n  while (p !== null) {\n    content += decoder.write(p.data);\n    p = p.next;\n  }\n\n  this._readableState.buffer.clear();\n\n  if (content !== '') this._readableState.buffer.push(content);\n  this._readableState.length = content.length;\n  return this;\n}; // Don't raise the hwm > 1GB\n\n\nvar MAX_HWM = 0x40000000;\n\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    // TODO(ronag): Throw ERR_VALUE_OUT_OF_RANGE.\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2 to prevent increasing hwm excessively in\n    // tiny amounts\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n\n  return n;\n} // This function is designed to be inlinable, so please take care when making\n// changes to the function body.\n\n\nfunction howMuchToRead(n, state) {\n  if (n <= 0 || state.length === 0 && state.ended) return 0;\n  if (state.objectMode) return 1;\n\n  if (n !== n) {\n    // Only flow one buffer at a time\n    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;\n  } // If we're asking for more than the current hwm, then raise the hwm.\n\n\n  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);\n  if (n <= state.length) return n; // Don't have enough\n\n  if (!state.ended) {\n    state.needReadable = true;\n    return 0;\n  }\n\n  return state.length;\n} // you can override either this method, or the async _read(n) below.\n\n\nReadable.prototype.read = function (n) {\n  debug('read', n);\n  n = parseInt(n, 10);\n  var state = this._readableState;\n  var nOrig = n;\n  if (n !== 0) state.emittedReadable = false; // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n\n  if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state); // if we've ended, and we're now clear, then finish it up.\n\n  if (n === 0 && state.ended) {\n    if (state.length === 0) endReadable(this);\n    return null;\n  } // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n  // if we need a readable event, then we need to do some reading.\n\n\n  var doRead = state.needReadable;\n  debug('need readable', doRead); // if we currently have less than the highWaterMark, then also read some\n\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  } // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n\n\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  } else if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true; // if the length is currently zero, then we *need* a readable event.\n\n    if (state.length === 0) state.needReadable = true; // call internal read method\n\n    this._read(state.highWaterMark);\n\n    state.sync = false; // If _read pushed data synchronously, then `reading` will be false,\n    // and we need to re-evaluate how much data we can return to the user.\n\n    if (!state.reading) n = howMuchToRead(nOrig, state);\n  }\n\n  var ret;\n  if (n > 0) ret = fromList(n, state);else ret = null;\n\n  if (ret === null) {\n    state.needReadable = state.length <= state.highWaterMark;\n    n = 0;\n  } else {\n    state.length -= n;\n    state.awaitDrain = 0;\n  }\n\n  if (state.length === 0) {\n    // If we have nothing in the buffer, then we want to know\n    // as soon as we *do* get something into the buffer.\n    if (!state.ended) state.needReadable = true; // If we tried to read() past the EOF, then emit end on the next tick.\n\n    if (nOrig !== n && state.ended) endReadable(this);\n  }\n\n  if (ret !== null) this.emit('data', ret);\n  return ret;\n};\n\nfunction onEofChunk(stream, state) {\n  debug('onEofChunk');\n  if (state.ended) return;\n\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n\n  state.ended = true;\n\n  if (state.sync) {\n    // if we are sync, wait until next tick to emit the data.\n    // Otherwise we risk emitting data in the flow()\n    // the readable code triggers during a read() call\n    emitReadable(stream);\n  } else {\n    // emit 'readable' now to make sure it gets picked up.\n    state.needReadable = false;\n\n    if (!state.emittedReadable) {\n      state.emittedReadable = true;\n      emitReadable_(stream);\n    }\n  }\n} // Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\n\n\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  debug('emitReadable', state.needReadable, state.emittedReadable);\n  state.needReadable = false;\n\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    process.nextTick(emitReadable_, stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  var state = stream._readableState;\n  debug('emitReadable_', state.destroyed, state.length, state.ended);\n\n  if (!state.destroyed && (state.length || state.ended)) {\n    stream.emit('readable');\n    state.emittedReadable = false;\n  } // The stream needs another readable event if\n  // 1. It is not flowing, as the flow mechanism will take\n  //    care of it.\n  // 2. It is not ended.\n  // 3. It is below the highWaterMark, so we can schedule\n  //    another readable later.\n\n\n  state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;\n  flow(stream);\n} // at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\n\n\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    process.nextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  // Attempt to read more data if we should.\n  //\n  // The conditions for reading more data are (one of):\n  // - Not enough data buffered (state.length < state.highWaterMark). The loop\n  //   is responsible for filling the buffer with enough data if such data\n  //   is available. If highWaterMark is 0 and we are not in the flowing mode\n  //   we should _not_ attempt to buffer any extra data. We'll get more data\n  //   when the stream consumer calls read() instead.\n  // - No data in the buffer, and the stream is in flowing mode. In this mode\n  //   the loop below is responsible for ensuring read() is called. Failing to\n  //   call read here would abort the flow and there's no other mechanism for\n  //   continuing the flow if the stream consumer has just subscribed to the\n  //   'data' event.\n  //\n  // In addition to the above conditions to keep reading data, the following\n  // conditions prevent the data from being read:\n  // - The stream has ended (state.ended).\n  // - There is already a pending 'read' operation (state.reading). This is a\n  //   case where the the stream has called the implementation defined _read()\n  //   method, but they are processing the call asynchronously and have _not_\n  //   called push() with new data. In this case we skip performing more\n  //   read()s. The execution ends in this method again after the _read() ends\n  //   up calling push() with more data.\n  while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {\n    var len = state.length;\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length) // didn't get any data, stop spinning.\n      break;\n  }\n\n  state.readingMore = false;\n} // abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\n\n\nReadable.prototype._read = function (n) {\n  errorOrDestroy(this, new ERR_METHOD_NOT_IMPLEMENTED('_read()'));\n};\n\nReadable.prototype.pipe = function (dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;\n  var endFn = doEnd ? onend : unpipe;\n  if (state.endEmitted) process.nextTick(endFn);else src.once('end', endFn);\n  dest.on('unpipe', onunpipe);\n\n  function onunpipe(readable, unpipeInfo) {\n    debug('onunpipe');\n\n    if (readable === src) {\n      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {\n        unpipeInfo.hasUnpiped = true;\n        cleanup();\n      }\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  } // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n\n\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n  var cleanedUp = false;\n\n  function cleanup() {\n    debug('cleanup'); // cleanup event handlers once the pipe is broken\n\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', unpipe);\n    src.removeListener('data', ondata);\n    cleanedUp = true; // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n\n    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();\n  }\n\n  src.on('data', ondata);\n\n  function ondata(chunk) {\n    debug('ondata');\n    var ret = dest.write(chunk);\n    debug('dest.write', ret);\n\n    if (ret === false) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      // => Check whether `dest` is still a piping destination.\n      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {\n        debug('false write response, pause', state.awaitDrain);\n        state.awaitDrain++;\n      }\n\n      src.pause();\n    }\n  } // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n\n\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0) errorOrDestroy(dest, er);\n  } // Make sure our error handler is attached before userland ones.\n\n\n  prependListener(dest, 'error', onerror); // Both close and finish should trigger unpipe, but only once.\n\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n\n  dest.once('close', onclose);\n\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  } // tell the dest that it's being piped to\n\n\n  dest.emit('pipe', src); // start the flow if it hasn't been started already.\n\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function pipeOnDrainFunctionResult() {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain) state.awaitDrain--;\n\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\nReadable.prototype.unpipe = function (dest) {\n  var state = this._readableState;\n  var unpipeInfo = {\n    hasUnpiped: false\n  }; // if we're not piping anywhere, then do nothing.\n\n  if (state.pipesCount === 0) return this; // just one destination.  most common case.\n\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes) return this;\n    if (!dest) dest = state.pipes; // got a match.\n\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest) dest.emit('unpipe', this, unpipeInfo);\n    return this;\n  } // slow case. multiple pipe destinations.\n\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++) {\n      dests[i].emit('unpipe', this, {\n        hasUnpiped: false\n      });\n    }\n\n    return this;\n  } // try to find the right one.\n\n\n  var index = indexOf(state.pipes, dest);\n  if (index === -1) return this;\n  state.pipes.splice(index, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1) state.pipes = state.pipes[0];\n  dest.emit('unpipe', this, unpipeInfo);\n  return this;\n}; // set up data events if they are asked for\n// Ensure readable listeners eventually get something\n\n\nReadable.prototype.on = function (ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n  var state = this._readableState;\n\n  if (ev === 'data') {\n    // update readableListening so that resume() may be a no-op\n    // a few lines down. This is needed to support once('readable').\n    state.readableListening = this.listenerCount('readable') > 0; // Try start flowing on next tick if stream isn't explicitly paused\n\n    if (state.flowing !== false) this.resume();\n  } else if (ev === 'readable') {\n    if (!state.endEmitted && !state.readableListening) {\n      state.readableListening = state.needReadable = true;\n      state.flowing = false;\n      state.emittedReadable = false;\n      debug('on readable', state.length, state.reading);\n\n      if (state.length) {\n        emitReadable(this);\n      } else if (!state.reading) {\n        process.nextTick(nReadingNextTick, this);\n      }\n    }\n  }\n\n  return res;\n};\n\nReadable.prototype.addListener = Readable.prototype.on;\n\nReadable.prototype.removeListener = function (ev, fn) {\n  var res = Stream.prototype.removeListener.call(this, ev, fn);\n\n  if (ev === 'readable') {\n    // We need to check if there is someone still listening to\n    // readable and reset the state. However this needs to happen\n    // after readable has been emitted but before I/O (nextTick) to\n    // support once('readable', fn) cycles. This means that calling\n    // resume within the same tick will have no\n    // effect.\n    process.nextTick(updateReadableListening, this);\n  }\n\n  return res;\n};\n\nReadable.prototype.removeAllListeners = function (ev) {\n  var res = Stream.prototype.removeAllListeners.apply(this, arguments);\n\n  if (ev === 'readable' || ev === undefined) {\n    // We need to check if there is someone still listening to\n    // readable and reset the state. However this needs to happen\n    // after readable has been emitted but before I/O (nextTick) to\n    // support once('readable', fn) cycles. This means that calling\n    // resume within the same tick will have no\n    // effect.\n    process.nextTick(updateReadableListening, this);\n  }\n\n  return res;\n};\n\nfunction updateReadableListening(self) {\n  var state = self._readableState;\n  state.readableListening = self.listenerCount('readable') > 0;\n\n  if (state.resumeScheduled && !state.paused) {\n    // flowing needs to be set to true now, otherwise\n    // the upcoming resume will not flow.\n    state.flowing = true; // crude way to check if we should resume\n  } else if (self.listenerCount('data') > 0) {\n    self.resume();\n  }\n}\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n} // pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\n\n\nReadable.prototype.resume = function () {\n  var state = this._readableState;\n\n  if (!state.flowing) {\n    debug('resume'); // we flow only if there is no one listening\n    // for readable, but we still have to call\n    // resume()\n\n    state.flowing = !state.readableListening;\n    resume(this, state);\n  }\n\n  state.paused = false;\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    process.nextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  debug('resume', state.reading);\n\n  if (!state.reading) {\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading) stream.read(0);\n}\n\nReadable.prototype.pause = function () {\n  debug('call pause flowing=%j', this._readableState.flowing);\n\n  if (this._readableState.flowing !== false) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n\n  this._readableState.paused = true;\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n\n  while (state.flowing && stream.read() !== null) {\n    ;\n  }\n} // wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\n\n\nReadable.prototype.wrap = function (stream) {\n  var _this = this;\n\n  var state = this._readableState;\n  var paused = false;\n  stream.on('end', function () {\n    debug('wrapped end');\n\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length) _this.push(chunk);\n    }\n\n    _this.push(null);\n  });\n  stream.on('data', function (chunk) {\n    debug('wrapped data');\n    if (state.decoder) chunk = state.decoder.write(chunk); // don't skip over falsy values in objectMode\n\n    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;\n\n    var ret = _this.push(chunk);\n\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  }); // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function methodWrap(method) {\n        return function methodWrapReturnFunction() {\n          return stream[method].apply(stream, arguments);\n        };\n      }(i);\n    }\n  } // proxy certain important events.\n\n\n  for (var n = 0; n < kProxyEvents.length; n++) {\n    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));\n  } // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n\n\n  this._read = function (n) {\n    debug('wrapped _read', n);\n\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return this;\n};\n\nif (typeof Symbol === 'function') {\n  Readable.prototype[Symbol.asyncIterator] = function () {\n    if (createReadableStreamAsyncIterator === undefined) {\n      createReadableStreamAsyncIterator = require('./internal/streams/async_iterator');\n    }\n\n    return createReadableStreamAsyncIterator(this);\n  };\n}\n\nObject.defineProperty(Readable.prototype, 'readableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState.highWaterMark;\n  }\n});\nObject.defineProperty(Readable.prototype, 'readableBuffer', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState && this._readableState.buffer;\n  }\n});\nObject.defineProperty(Readable.prototype, 'readableFlowing', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState.flowing;\n  },\n  set: function set(state) {\n    if (this._readableState) {\n      this._readableState.flowing = state;\n    }\n  }\n}); // exposed for testing purposes only.\n\nReadable._fromList = fromList;\nObject.defineProperty(Readable.prototype, 'readableLength', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState.length;\n  }\n}); // Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\n\nfunction fromList(n, state) {\n  // nothing buffered\n  if (state.length === 0) return null;\n  var ret;\n  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {\n    // read it all, truncate the list\n    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.first();else ret = state.buffer.concat(state.length);\n    state.buffer.clear();\n  } else {\n    // read part of list\n    ret = state.buffer.consume(n, state.decoder);\n  }\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n  debug('endReadable', state.endEmitted);\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    process.nextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  debug('endReadableNT', state.endEmitted, state.length); // Check that we didn't get one last unshift.\n\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n\n    if (state.autoDestroy) {\n      // In case of duplex streams we need a way to detect\n      // if the writable side is ready for autoDestroy as well\n      var wState = stream._writableState;\n\n      if (!wState || wState.autoDestroy && wState.finished) {\n        stream.destroy();\n      }\n    }\n  }\n}\n\nif (typeof Symbol === 'function') {\n  Readable.from = function (iterable, opts) {\n    if (from === undefined) {\n      from = require('./internal/streams/from');\n    }\n\n    return from(Readable, iterable, opts);\n  };\n}\n\nfunction indexOf(xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n\n  return -1;\n}","var global = require('../internals/global');\n\nmodule.exports = global;\n","module.exports = require('events').EventEmitter;\n","// Ported from https://github.com/mafintosh/end-of-stream with\n// permission from the author, Mathias Buus (@mafintosh).\n'use strict';\n\nvar ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;\n\nfunction once(callback) {\n  var called = false;\n  return function () {\n    if (called) return;\n    called = true;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    callback.apply(this, args);\n  };\n}\n\nfunction noop() {}\n\nfunction isRequest(stream) {\n  return stream.setHeader && typeof stream.abort === 'function';\n}\n\nfunction eos(stream, opts, callback) {\n  if (typeof opts === 'function') return eos(stream, null, opts);\n  if (!opts) opts = {};\n  callback = once(callback || noop);\n  var readable = opts.readable || opts.readable !== false && stream.readable;\n  var writable = opts.writable || opts.writable !== false && stream.writable;\n\n  var onlegacyfinish = function onlegacyfinish() {\n    if (!stream.writable) onfinish();\n  };\n\n  var writableEnded = stream._writableState && stream._writableState.finished;\n\n  var onfinish = function onfinish() {\n    writable = false;\n    writableEnded = true;\n    if (!readable) callback.call(stream);\n  };\n\n  var readableEnded = stream._readableState && stream._readableState.endEmitted;\n\n  var onend = function onend() {\n    readable = false;\n    readableEnded = true;\n    if (!writable) callback.call(stream);\n  };\n\n  var onerror = function onerror(err) {\n    callback.call(stream, err);\n  };\n\n  var onclose = function onclose() {\n    var err;\n\n    if (readable && !readableEnded) {\n      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();\n      return callback.call(stream, err);\n    }\n\n    if (writable && !writableEnded) {\n      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();\n      return callback.call(stream, err);\n    }\n  };\n\n  var onrequest = function onrequest() {\n    stream.req.on('finish', onfinish);\n  };\n\n  if (isRequest(stream)) {\n    stream.on('complete', onfinish);\n    stream.on('abort', onclose);\n    if (stream.req) onrequest();else stream.on('request', onrequest);\n  } else if (writable && !stream._writableState) {\n    // legacy streams\n    stream.on('end', onlegacyfinish);\n    stream.on('close', onlegacyfinish);\n  }\n\n  stream.on('end', onend);\n  stream.on('finish', onfinish);\n  if (opts.error !== false) stream.on('error', onerror);\n  stream.on('close', onclose);\n  return function () {\n    stream.removeListener('complete', onfinish);\n    stream.removeListener('abort', onclose);\n    stream.removeListener('request', onrequest);\n    if (stream.req) stream.req.removeListener('finish', onfinish);\n    stream.removeListener('end', onlegacyfinish);\n    stream.removeListener('close', onlegacyfinish);\n    stream.removeListener('finish', onfinish);\n    stream.removeListener('end', onend);\n    stream.removeListener('error', onerror);\n    stream.removeListener('close', onclose);\n  };\n}\n\nmodule.exports = eos;","exports.nextTick = function nextTick(fn) {\n    var args = Array.prototype.slice.call(arguments);\n    args.shift();\n    setTimeout(function () {\n        fn.apply(null, args);\n    }, 0);\n};\n\nexports.platform = exports.arch = \nexports.execPath = exports.title = 'browser';\nexports.pid = 1;\nexports.browser = true;\nexports.env = {};\nexports.argv = [];\n\nexports.binding = function (name) {\n\tthrow new Error('No such module. (Possibly not yet loaded)')\n};\n\n(function () {\n    var cwd = '/';\n    var path;\n    exports.cwd = function () { return cwd };\n    exports.chdir = function (dir) {\n        if (!path) path = require('path');\n        cwd = path.resolve(dir, cwd);\n    };\n})();\n\nexports.exit = exports.kill = \nexports.umask = exports.dlopen = \nexports.uptime = exports.memoryUsage = \nexports.uvCounters = function() {};\nexports.features = {};\n","'use strict';\n\nvar BN = require('bn.js');\nvar utils = require('../utils');\nvar assert = utils.assert;\nvar cachedProperty = utils.cachedProperty;\nvar parseBytes = utils.parseBytes;\n\n/**\n* @param {EDDSA} eddsa - eddsa instance\n* @param {Array<Bytes>|Object} sig -\n* @param {Array<Bytes>|Point} [sig.R] - R point as Point or bytes\n* @param {Array<Bytes>|bn} [sig.S] - S scalar as bn or bytes\n* @param {Array<Bytes>} [sig.Rencoded] - R point encoded\n* @param {Array<Bytes>} [sig.Sencoded] - S scalar encoded\n*/\nfunction Signature(eddsa, sig) {\n  this.eddsa = eddsa;\n\n  if (typeof sig !== 'object')\n    sig = parseBytes(sig);\n\n  if (Array.isArray(sig)) {\n    sig = {\n      R: sig.slice(0, eddsa.encodingLength),\n      S: sig.slice(eddsa.encodingLength),\n    };\n  }\n\n  assert(sig.R && sig.S, 'Signature without R or S');\n\n  if (eddsa.isPoint(sig.R))\n    this._R = sig.R;\n  if (sig.S instanceof BN)\n    this._S = sig.S;\n\n  this._Rencoded = Array.isArray(sig.R) ? sig.R : sig.Rencoded;\n  this._Sencoded = Array.isArray(sig.S) ? sig.S : sig.Sencoded;\n}\n\ncachedProperty(Signature, 'S', function S() {\n  return this.eddsa.decodeInt(this.Sencoded());\n});\n\ncachedProperty(Signature, 'R', function R() {\n  return this.eddsa.decodePoint(this.Rencoded());\n});\n\ncachedProperty(Signature, 'Rencoded', function Rencoded() {\n  return this.eddsa.encodePoint(this.R());\n});\n\ncachedProperty(Signature, 'Sencoded', function Sencoded() {\n  return this.eddsa.encodeInt(this.S());\n});\n\nSignature.prototype.toBytes = function toBytes() {\n  return this.Rencoded().concat(this.Sencoded());\n};\n\nSignature.prototype.toHex = function toHex() {\n  return utils.encode(this.toBytes(), 'hex').toUpperCase();\n};\n\nmodule.exports = Signature;\n","var fails = require('../internals/fails');\nvar classof = require('../internals/classof-raw');\n\nvar split = ''.split;\n\n// fallback for non-array-like ES3 and non-enumerable old V8 strings\nmodule.exports = fails(function () {\n  // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346\n  // eslint-disable-next-line no-prototype-builtins -- safe\n  return !Object('z').propertyIsEnumerable(0);\n}) ? function (it) {\n  return classof(it) == 'String' ? split.call(it, '') : Object(it);\n} : Object;\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar create = require('../internals/object-create');\nvar definePropertyModule = require('../internals/object-define-property');\n\nvar UNSCOPABLES = wellKnownSymbol('unscopables');\nvar ArrayPrototype = Array.prototype;\n\n// Array.prototype[@@unscopables]\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\nif (ArrayPrototype[UNSCOPABLES] == undefined) {\n  definePropertyModule.f(ArrayPrototype, UNSCOPABLES, {\n    configurable: true,\n    value: create(null)\n  });\n}\n\n// add a key to Array.prototype[@@unscopables]\nmodule.exports = function (key) {\n  ArrayPrototype[UNSCOPABLES][key] = true;\n};\n","var global = require('../internals/global');\n\nmodule.exports = function (a, b) {\n  var console = global.console;\n  if (console && console.error) {\n    arguments.length === 1 ? console.error(a) : console.error(a, b);\n  }\n};\n","var isObject = require('../internals/is-object');\nvar classof = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\n// `IsRegExp` abstract operation\n// https://tc39.es/ecma262/#sec-isregexp\nmodule.exports = function (it) {\n  var isRegExp;\n  return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classof(it) == 'RegExp');\n};\n","import { popperGenerator, detectOverflow } from \"./createPopper.js\";\nimport eventListeners from \"./modifiers/eventListeners.js\";\nimport popperOffsets from \"./modifiers/popperOffsets.js\";\nimport computeStyles from \"./modifiers/computeStyles.js\";\nimport applyStyles from \"./modifiers/applyStyles.js\";\nvar defaultModifiers = [eventListeners, popperOffsets, computeStyles, applyStyles];\nvar createPopper = /*#__PURE__*/popperGenerator({\n  defaultModifiers: defaultModifiers\n}); // eslint-disable-next-line import/no-unused-modules\n\nexport { createPopper, popperGenerator, defaultModifiers, detectOverflow };","'use strict';\n\n/*<replacement>*/\n\nvar pna = require('process-nextick-args');\n/*</replacement>*/\n\n// undocumented cb() API, needed for core, not for public API\nfunction destroy(err, cb) {\n  var _this = this;\n\n  var readableDestroyed = this._readableState && this._readableState.destroyed;\n  var writableDestroyed = this._writableState && this._writableState.destroyed;\n\n  if (readableDestroyed || writableDestroyed) {\n    if (cb) {\n      cb(err);\n    } else if (err && (!this._writableState || !this._writableState.errorEmitted)) {\n      pna.nextTick(emitErrorNT, this, err);\n    }\n    return this;\n  }\n\n  // we set destroyed to true before firing error callbacks in order\n  // to make it re-entrance safe in case destroy() is called within callbacks\n\n  if (this._readableState) {\n    this._readableState.destroyed = true;\n  }\n\n  // if this is a duplex stream mark the writable part as destroyed as well\n  if (this._writableState) {\n    this._writableState.destroyed = true;\n  }\n\n  this._destroy(err || null, function (err) {\n    if (!cb && err) {\n      pna.nextTick(emitErrorNT, _this, err);\n      if (_this._writableState) {\n        _this._writableState.errorEmitted = true;\n      }\n    } else if (cb) {\n      cb(err);\n    }\n  });\n\n  return this;\n}\n\nfunction undestroy() {\n  if (this._readableState) {\n    this._readableState.destroyed = false;\n    this._readableState.reading = false;\n    this._readableState.ended = false;\n    this._readableState.endEmitted = false;\n  }\n\n  if (this._writableState) {\n    this._writableState.destroyed = false;\n    this._writableState.ended = false;\n    this._writableState.ending = false;\n    this._writableState.finished = false;\n    this._writableState.errorEmitted = false;\n  }\n}\n\nfunction emitErrorNT(self, err) {\n  self.emit('error', err);\n}\n\nmodule.exports = {\n  destroy: destroy,\n  undestroy: undestroy\n};","/**\n * @file xhr.js\n */\n\n/**\n * A wrapper for videojs.xhr that tracks bandwidth.\n *\n * @param {Object} options options for the XHR\n * @param {Function} callback the callback to call when done\n * @return {Request} the xhr request that is going to be made\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar xhrFactory = function xhrFactory() {\n  var xhr = function XhrFunction(options, callback) {\n    // Add a default timeout for all hls requests\n    options = (0, _videoJs.mergeOptions)({\n      timeout: 45e3\n    }, options);\n\n    // Allow an optional user-specified function to modify the option\n    // object before we construct the xhr request\n    var beforeRequest = XhrFunction.beforeRequest || _videoJs2['default'].Hls.xhr.beforeRequest;\n\n    if (beforeRequest && typeof beforeRequest === 'function') {\n      var newOptions = beforeRequest(options);\n\n      if (newOptions) {\n        options = newOptions;\n      }\n    }\n\n    var request = (0, _videoJs.xhr)(options, function (error, response) {\n      var reqResponse = request.response;\n\n      if (!error && reqResponse) {\n        request.responseTime = Date.now();\n        request.roundTripTime = request.responseTime - request.requestTime;\n        request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n        if (!request.bandwidth) {\n          request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n        }\n      }\n\n      // videojs.xhr now uses a specific code on the error\n      // object to signal that a request has timed out instead\n      // of setting a boolean on the request object\n      if (error && error.code === 'ETIMEDOUT') {\n        request.timedout = true;\n      }\n\n      // videojs.xhr no longer considers status codes outside of 200 and 0\n      // (for file uris) to be errors, but the old XHR did, so emulate that\n      // behavior. Status 206 may be used in response to byterange requests.\n      if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n        error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n      }\n\n      callback(error, request);\n    });\n    var originalAbort = request.abort;\n\n    request.abort = function () {\n      request.aborted = true;\n      return originalAbort.apply(request, arguments);\n    };\n    request.uri = options.uri;\n    request.requestTime = Date.now();\n    return request;\n  };\n\n  return xhr;\n};\n\nexports['default'] = xhrFactory;\nmodule.exports = exports['default'];","var topLevel = typeof global !== 'undefined' ? global :\n    typeof window !== 'undefined' ? window : {}\nvar minDoc = require('min-document');\n\nvar doccy;\n\nif (typeof document !== 'undefined') {\n    doccy = document;\n} else {\n    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n\n    if (!doccy) {\n        doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n    }\n}\n\nmodule.exports = doccy;\n","/*!\n  * @intlify/message-compiler v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\nimport { format, assign, isString } from '@intlify/shared';\n\n/** @internal */\r\nconst errorMessages = {\r\n    // tokenizer error messages\r\n    [0 /* EXPECTED_TOKEN */]: `Expected token: '{0}'`,\r\n    [1 /* INVALID_TOKEN_IN_PLACEHOLDER */]: `Invalid token in placeholder: '{0}'`,\r\n    [2 /* UNTERMINATED_SINGLE_QUOTE_IN_PLACEHOLDER */]: `Unterminated single quote in placeholder`,\r\n    [3 /* UNKNOWN_ESCAPE_SEQUENCE */]: `Unknown escape sequence: \\\\{0}`,\r\n    [4 /* INVALID_UNICODE_ESCAPE_SEQUENCE */]: `Invalid unicode escape sequence: {0}`,\r\n    [5 /* UNBALANCED_CLOSING_BRACE */]: `Unbalanced closing brace`,\r\n    [6 /* UNTERMINATED_CLOSING_BRACE */]: `Unterminated closing brace`,\r\n    [7 /* EMPTY_PLACEHOLDER */]: `Empty placeholder`,\r\n    [8 /* NOT_ALLOW_NEST_PLACEHOLDER */]: `Not allowed nest placeholder`,\r\n    [9 /* INVALID_LINKED_FORMAT */]: `Invalid linked format`,\r\n    // parser error messages\r\n    [10 /* MUST_HAVE_MESSAGES_IN_PLURAL */]: `Plural must have messages`,\r\n    [11 /* UNEXPECTED_EMPTY_LINKED_MODIFIER */]: `Unexpected empty linked modifier`,\r\n    [12 /* UNEXPECTED_EMPTY_LINKED_KEY */]: `Unexpected empty linked key`,\r\n    [13 /* UNEXPECTED_LEXICAL_ANALYSIS */]: `Unexpected lexical analysis in token: '{0}'`\r\n};\r\nfunction createCompileError(code, loc, options = {}) {\r\n    const { domain, messages, args } = options;\r\n    const msg = (process.env.NODE_ENV !== 'production')\r\n        ? format((messages || errorMessages)[code] || '', ...(args || []))\r\n        : code;\r\n    const error = new SyntaxError(String(msg));\r\n    error.code = code;\r\n    if (loc) {\r\n        error.location = loc;\r\n    }\r\n    error.domain = domain;\r\n    return error;\r\n}\r\n/** @internal */\r\nfunction defaultOnError(error) {\r\n    throw error;\r\n}\n\nconst LocationStub = {\r\n    start: { line: 1, column: 1, offset: 0 },\r\n    end: { line: 1, column: 1, offset: 0 }\r\n};\r\nfunction createPosition(line, column, offset) {\r\n    return { line, column, offset };\r\n}\r\nfunction createLocation(start, end, source) {\r\n    const loc = { start, end };\r\n    if (source != null) {\r\n        loc.source = source;\r\n    }\r\n    return loc;\r\n}\n\nconst CHAR_SP = ' ';\r\nconst CHAR_CR = '\\r';\r\nconst CHAR_LF = '\\n';\r\nconst CHAR_LS = String.fromCharCode(0x2028);\r\nconst CHAR_PS = String.fromCharCode(0x2029);\r\nfunction createScanner(str) {\r\n    const _buf = str;\r\n    let _index = 0;\r\n    let _line = 1;\r\n    let _column = 1;\r\n    let _peekOffset = 0;\r\n    const isCRLF = (index) => _buf[index] === CHAR_CR && _buf[index + 1] === CHAR_LF;\r\n    const isLF = (index) => _buf[index] === CHAR_LF;\r\n    const isPS = (index) => _buf[index] === CHAR_PS;\r\n    const isLS = (index) => _buf[index] === CHAR_LS;\r\n    const isLineEnd = (index) => isCRLF(index) || isLF(index) || isPS(index) || isLS(index);\r\n    const index = () => _index;\r\n    const line = () => _line;\r\n    const column = () => _column;\r\n    const peekOffset = () => _peekOffset;\r\n    const charAt = (offset) => isCRLF(offset) || isPS(offset) || isLS(offset) ? CHAR_LF : _buf[offset];\r\n    const currentChar = () => charAt(_index);\r\n    const currentPeek = () => charAt(_index + _peekOffset);\r\n    function next() {\r\n        _peekOffset = 0;\r\n        if (isLineEnd(_index)) {\r\n            _line++;\r\n            _column = 0;\r\n        }\r\n        if (isCRLF(_index)) {\r\n            _index++;\r\n        }\r\n        _index++;\r\n        _column++;\r\n        return _buf[_index];\r\n    }\r\n    function peek() {\r\n        if (isCRLF(_index + _peekOffset)) {\r\n            _peekOffset++;\r\n        }\r\n        _peekOffset++;\r\n        return _buf[_index + _peekOffset];\r\n    }\r\n    function reset() {\r\n        _index = 0;\r\n        _line = 1;\r\n        _column = 1;\r\n        _peekOffset = 0;\r\n    }\r\n    function resetPeek(offset = 0) {\r\n        _peekOffset = offset;\r\n    }\r\n    function skipToPeek() {\r\n        const target = _index + _peekOffset;\r\n        // eslint-disable-next-line no-unmodified-loop-condition\r\n        while (target !== _index) {\r\n            next();\r\n        }\r\n        _peekOffset = 0;\r\n    }\r\n    return {\r\n        index,\r\n        line,\r\n        column,\r\n        peekOffset,\r\n        charAt,\r\n        currentChar,\r\n        currentPeek,\r\n        next,\r\n        peek,\r\n        reset,\r\n        resetPeek,\r\n        skipToPeek\r\n    };\r\n}\n\nconst EOF = undefined;\r\nconst LITERAL_DELIMITER = \"'\";\r\nconst ERROR_DOMAIN$1 = 'tokenizer';\r\nfunction createTokenizer(source, options = {}) {\r\n    const location = options.location !== false;\r\n    const _scnr = createScanner(source);\r\n    const currentOffset = () => _scnr.index();\r\n    const currentPosition = () => createPosition(_scnr.line(), _scnr.column(), _scnr.index());\r\n    const _initLoc = currentPosition();\r\n    const _initOffset = currentOffset();\r\n    const _context = {\r\n        currentType: 14 /* EOF */,\r\n        offset: _initOffset,\r\n        startLoc: _initLoc,\r\n        endLoc: _initLoc,\r\n        lastType: 14 /* EOF */,\r\n        lastOffset: _initOffset,\r\n        lastStartLoc: _initLoc,\r\n        lastEndLoc: _initLoc,\r\n        braceNest: 0,\r\n        inLinked: false,\r\n        text: ''\r\n    };\r\n    const context = () => _context;\r\n    const { onError } = options;\r\n    function emitError(code, pos, offset, ...args) {\r\n        const ctx = context();\r\n        pos.column += offset;\r\n        pos.offset += offset;\r\n        if (onError) {\r\n            const loc = createLocation(ctx.startLoc, pos);\r\n            const err = createCompileError(code, loc, {\r\n                domain: ERROR_DOMAIN$1,\r\n                args\r\n            });\r\n            onError(err);\r\n        }\r\n    }\r\n    function getToken(context, type, value) {\r\n        context.endLoc = currentPosition();\r\n        context.currentType = type;\r\n        const token = { type };\r\n        if (location) {\r\n            token.loc = createLocation(context.startLoc, context.endLoc);\r\n        }\r\n        if (value != null) {\r\n            token.value = value;\r\n        }\r\n        return token;\r\n    }\r\n    const getEndToken = (context) => getToken(context, 14 /* EOF */);\r\n    function eat(scnr, ch) {\r\n        if (scnr.currentChar() === ch) {\r\n            scnr.next();\r\n            return ch;\r\n        }\r\n        else {\r\n            emitError(0 /* EXPECTED_TOKEN */, currentPosition(), 0, ch);\r\n            return '';\r\n        }\r\n    }\r\n    function peekSpaces(scnr) {\r\n        let buf = '';\r\n        while (scnr.currentPeek() === CHAR_SP || scnr.currentPeek() === CHAR_LF) {\r\n            buf += scnr.currentPeek();\r\n            scnr.peek();\r\n        }\r\n        return buf;\r\n    }\r\n    function skipSpaces(scnr) {\r\n        const buf = peekSpaces(scnr);\r\n        scnr.skipToPeek();\r\n        return buf;\r\n    }\r\n    function isIdentifierStart(ch) {\r\n        if (ch === EOF) {\r\n            return false;\r\n        }\r\n        const cc = ch.charCodeAt(0);\r\n        return ((cc >= 97 && cc <= 122) || // a-z\r\n            (cc >= 65 && cc <= 90) || // A-Z\r\n            cc === 95 // _\r\n        );\r\n    }\r\n    function isNumberStart(ch) {\r\n        if (ch === EOF) {\r\n            return false;\r\n        }\r\n        const cc = ch.charCodeAt(0);\r\n        return cc >= 48 && cc <= 57; // 0-9\r\n    }\r\n    function isNamedIdentifierStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (currentType !== 2 /* BraceLeft */) {\r\n            return false;\r\n        }\r\n        peekSpaces(scnr);\r\n        const ret = isIdentifierStart(scnr.currentPeek());\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isListIdentifierStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (currentType !== 2 /* BraceLeft */) {\r\n            return false;\r\n        }\r\n        peekSpaces(scnr);\r\n        const ch = scnr.currentPeek() === '-' ? scnr.peek() : scnr.currentPeek();\r\n        const ret = isNumberStart(ch);\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isLiteralStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (currentType !== 2 /* BraceLeft */) {\r\n            return false;\r\n        }\r\n        peekSpaces(scnr);\r\n        const ret = scnr.currentPeek() === LITERAL_DELIMITER;\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isLinkedDotStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (currentType !== 8 /* LinkedAlias */) {\r\n            return false;\r\n        }\r\n        peekSpaces(scnr);\r\n        const ret = scnr.currentPeek() === \".\" /* LinkedDot */;\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isLinkedModifierStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (currentType !== 9 /* LinkedDot */) {\r\n            return false;\r\n        }\r\n        peekSpaces(scnr);\r\n        const ret = isIdentifierStart(scnr.currentPeek());\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isLinkedDelimiterStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (!(currentType === 8 /* LinkedAlias */ ||\r\n            currentType === 12 /* LinkedModifier */)) {\r\n            return false;\r\n        }\r\n        peekSpaces(scnr);\r\n        const ret = scnr.currentPeek() === \":\" /* LinkedDelimiter */;\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isLinkedReferStart(scnr, context) {\r\n        const { currentType } = context;\r\n        if (currentType !== 10 /* LinkedDelimiter */) {\r\n            return false;\r\n        }\r\n        const fn = () => {\r\n            const ch = scnr.currentPeek();\r\n            if (ch === \"{\" /* BraceLeft */) {\r\n                return isIdentifierStart(scnr.peek());\r\n            }\r\n            else if (ch === \"@\" /* LinkedAlias */ ||\r\n                ch === \"%\" /* Modulo */ ||\r\n                ch === \"|\" /* Pipe */ ||\r\n                ch === \":\" /* LinkedDelimiter */ ||\r\n                ch === \".\" /* LinkedDot */ ||\r\n                ch === CHAR_SP ||\r\n                !ch) {\r\n                return false;\r\n            }\r\n            else if (ch === CHAR_LF) {\r\n                scnr.peek();\r\n                return fn();\r\n            }\r\n            else {\r\n                // other characters\r\n                return isIdentifierStart(ch);\r\n            }\r\n        };\r\n        const ret = fn();\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isPluralStart(scnr) {\r\n        peekSpaces(scnr);\r\n        const ret = scnr.currentPeek() === \"|\" /* Pipe */;\r\n        scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function isTextStart(scnr, reset = true) {\r\n        const fn = (hasSpace = false, prev = '', detectModulo = false) => {\r\n            const ch = scnr.currentPeek();\r\n            if (ch === \"{\" /* BraceLeft */) {\r\n                return prev === \"%\" /* Modulo */ ? false : hasSpace;\r\n            }\r\n            else if (ch === \"@\" /* LinkedAlias */ || !ch) {\r\n                return prev === \"%\" /* Modulo */ ? true : hasSpace;\r\n            }\r\n            else if (ch === \"%\" /* Modulo */) {\r\n                scnr.peek();\r\n                return fn(hasSpace, \"%\" /* Modulo */, true);\r\n            }\r\n            else if (ch === \"|\" /* Pipe */) {\r\n                return prev === \"%\" /* Modulo */ || detectModulo\r\n                    ? true\r\n                    : !(prev === CHAR_SP || prev === CHAR_LF);\r\n            }\r\n            else if (ch === CHAR_SP) {\r\n                scnr.peek();\r\n                return fn(true, CHAR_SP, detectModulo);\r\n            }\r\n            else if (ch === CHAR_LF) {\r\n                scnr.peek();\r\n                return fn(true, CHAR_LF, detectModulo);\r\n            }\r\n            else {\r\n                return true;\r\n            }\r\n        };\r\n        const ret = fn();\r\n        reset && scnr.resetPeek();\r\n        return ret;\r\n    }\r\n    function takeChar(scnr, fn) {\r\n        const ch = scnr.currentChar();\r\n        if (ch === EOF) {\r\n            return EOF;\r\n        }\r\n        if (fn(ch)) {\r\n            scnr.next();\r\n            return ch;\r\n        }\r\n        return null;\r\n    }\r\n    function takeIdentifierChar(scnr) {\r\n        const closure = (ch) => {\r\n            const cc = ch.charCodeAt(0);\r\n            return ((cc >= 97 && cc <= 122) || // a-z\r\n                (cc >= 65 && cc <= 90) || // A-Z\r\n                (cc >= 48 && cc <= 57) || // 0-9\r\n                cc === 95 || // _\r\n                cc === 36 // $\r\n            );\r\n        };\r\n        return takeChar(scnr, closure);\r\n    }\r\n    function takeDigit(scnr) {\r\n        const closure = (ch) => {\r\n            const cc = ch.charCodeAt(0);\r\n            return cc >= 48 && cc <= 57; // 0-9\r\n        };\r\n        return takeChar(scnr, closure);\r\n    }\r\n    function takeHexDigit(scnr) {\r\n        const closure = (ch) => {\r\n            const cc = ch.charCodeAt(0);\r\n            return ((cc >= 48 && cc <= 57) || // 0-9\r\n                (cc >= 65 && cc <= 70) || // A-F\r\n                (cc >= 97 && cc <= 102)); // a-f\r\n        };\r\n        return takeChar(scnr, closure);\r\n    }\r\n    function getDigits(scnr) {\r\n        let ch = '';\r\n        let num = '';\r\n        while ((ch = takeDigit(scnr))) {\r\n            num += ch;\r\n        }\r\n        return num;\r\n    }\r\n    function readText(scnr) {\r\n        const fn = (buf) => {\r\n            const ch = scnr.currentChar();\r\n            if (ch === \"{\" /* BraceLeft */ ||\r\n                ch === \"}\" /* BraceRight */ ||\r\n                ch === \"@\" /* LinkedAlias */ ||\r\n                !ch) {\r\n                return buf;\r\n            }\r\n            else if (ch === \"%\" /* Modulo */) {\r\n                if (isTextStart(scnr)) {\r\n                    buf += ch;\r\n                    scnr.next();\r\n                    return fn(buf);\r\n                }\r\n                else {\r\n                    return buf;\r\n                }\r\n            }\r\n            else if (ch === \"|\" /* Pipe */) {\r\n                return buf;\r\n            }\r\n            else if (ch === CHAR_SP || ch === CHAR_LF) {\r\n                if (isTextStart(scnr)) {\r\n                    buf += ch;\r\n                    scnr.next();\r\n                    return fn(buf);\r\n                }\r\n                else if (isPluralStart(scnr)) {\r\n                    return buf;\r\n                }\r\n                else {\r\n                    buf += ch;\r\n                    scnr.next();\r\n                    return fn(buf);\r\n                }\r\n            }\r\n            else {\r\n                buf += ch;\r\n                scnr.next();\r\n                return fn(buf);\r\n            }\r\n        };\r\n        return fn('');\r\n    }\r\n    function readNamedIdentifier(scnr) {\r\n        skipSpaces(scnr);\r\n        let ch = '';\r\n        let name = '';\r\n        while ((ch = takeIdentifierChar(scnr))) {\r\n            name += ch;\r\n        }\r\n        if (scnr.currentChar() === EOF) {\r\n            emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);\r\n        }\r\n        return name;\r\n    }\r\n    function readListIdentifier(scnr) {\r\n        skipSpaces(scnr);\r\n        let value = '';\r\n        if (scnr.currentChar() === '-') {\r\n            scnr.next();\r\n            value += `-${getDigits(scnr)}`;\r\n        }\r\n        else {\r\n            value += getDigits(scnr);\r\n        }\r\n        if (scnr.currentChar() === EOF) {\r\n            emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);\r\n        }\r\n        return value;\r\n    }\r\n    function readLiteral(scnr) {\r\n        skipSpaces(scnr);\r\n        eat(scnr, `\\'`);\r\n        let ch = '';\r\n        let literal = '';\r\n        const fn = (x) => x !== LITERAL_DELIMITER && x !== CHAR_LF;\r\n        while ((ch = takeChar(scnr, fn))) {\r\n            if (ch === '\\\\') {\r\n                literal += readEscapeSequence(scnr);\r\n            }\r\n            else {\r\n                literal += ch;\r\n            }\r\n        }\r\n        const current = scnr.currentChar();\r\n        if (current === CHAR_LF || current === EOF) {\r\n            emitError(2 /* UNTERMINATED_SINGLE_QUOTE_IN_PLACEHOLDER */, currentPosition(), 0);\r\n            // TODO: Is it correct really?\r\n            if (current === CHAR_LF) {\r\n                scnr.next();\r\n                eat(scnr, `\\'`);\r\n            }\r\n            return literal;\r\n        }\r\n        eat(scnr, `\\'`);\r\n        return literal;\r\n    }\r\n    function readEscapeSequence(scnr) {\r\n        const ch = scnr.currentChar();\r\n        switch (ch) {\r\n            case '\\\\':\r\n            case `\\'`:\r\n                scnr.next();\r\n                return `\\\\${ch}`;\r\n            case 'u':\r\n                return readUnicodeEscapeSequence(scnr, ch, 4);\r\n            case 'U':\r\n                return readUnicodeEscapeSequence(scnr, ch, 6);\r\n            default:\r\n                emitError(3 /* UNKNOWN_ESCAPE_SEQUENCE */, currentPosition(), 0, ch);\r\n                return '';\r\n        }\r\n    }\r\n    function readUnicodeEscapeSequence(scnr, unicode, digits) {\r\n        eat(scnr, unicode);\r\n        let sequence = '';\r\n        for (let i = 0; i < digits; i++) {\r\n            const ch = takeHexDigit(scnr);\r\n            if (!ch) {\r\n                emitError(4 /* INVALID_UNICODE_ESCAPE_SEQUENCE */, currentPosition(), 0, `\\\\${unicode}${sequence}${scnr.currentChar()}`);\r\n                break;\r\n            }\r\n            sequence += ch;\r\n        }\r\n        return `\\\\${unicode}${sequence}`;\r\n    }\r\n    function readInvalidIdentifier(scnr) {\r\n        skipSpaces(scnr);\r\n        let ch = '';\r\n        let identifiers = '';\r\n        const closure = (ch) => ch !== \"{\" /* BraceLeft */ &&\r\n            ch !== \"}\" /* BraceRight */ &&\r\n            ch !== CHAR_SP &&\r\n            ch !== CHAR_LF;\r\n        while ((ch = takeChar(scnr, closure))) {\r\n            identifiers += ch;\r\n        }\r\n        return identifiers;\r\n    }\r\n    function readLinkedModifier(scnr) {\r\n        let ch = '';\r\n        let name = '';\r\n        while ((ch = takeIdentifierChar(scnr))) {\r\n            name += ch;\r\n        }\r\n        return name;\r\n    }\r\n    function readLinkedRefer(scnr) {\r\n        const fn = (detect = false, buf) => {\r\n            const ch = scnr.currentChar();\r\n            if (ch === \"{\" /* BraceLeft */ ||\r\n                ch === \"%\" /* Modulo */ ||\r\n                ch === \"@\" /* LinkedAlias */ ||\r\n                ch === \"|\" /* Pipe */ ||\r\n                !ch) {\r\n                return buf;\r\n            }\r\n            else if (ch === CHAR_SP) {\r\n                return buf;\r\n            }\r\n            else if (ch === CHAR_LF) {\r\n                buf += ch;\r\n                scnr.next();\r\n                return fn(detect, buf);\r\n            }\r\n            else {\r\n                buf += ch;\r\n                scnr.next();\r\n                return fn(true, buf);\r\n            }\r\n        };\r\n        return fn(false, '');\r\n    }\r\n    function readPlural(scnr) {\r\n        skipSpaces(scnr);\r\n        const plural = eat(scnr, \"|\" /* Pipe */);\r\n        skipSpaces(scnr);\r\n        return plural;\r\n    }\r\n    // TODO: We need refactoring of token parsing ...\r\n    function readTokenInPlaceholder(scnr, context) {\r\n        let token = null;\r\n        const ch = scnr.currentChar();\r\n        switch (ch) {\r\n            case \"{\" /* BraceLeft */:\r\n                if (context.braceNest >= 1) {\r\n                    emitError(8 /* NOT_ALLOW_NEST_PLACEHOLDER */, currentPosition(), 0);\r\n                }\r\n                scnr.next();\r\n                token = getToken(context, 2 /* BraceLeft */, \"{\" /* BraceLeft */);\r\n                skipSpaces(scnr);\r\n                context.braceNest++;\r\n                return token;\r\n            case \"}\" /* BraceRight */:\r\n                if (context.braceNest > 0 &&\r\n                    context.currentType === 2 /* BraceLeft */) {\r\n                    emitError(7 /* EMPTY_PLACEHOLDER */, currentPosition(), 0);\r\n                }\r\n                scnr.next();\r\n                token = getToken(context, 3 /* BraceRight */, \"}\" /* BraceRight */);\r\n                context.braceNest--;\r\n                context.braceNest > 0 && skipSpaces(scnr);\r\n                if (context.inLinked && context.braceNest === 0) {\r\n                    context.inLinked = false;\r\n                }\r\n                return token;\r\n            case \"@\" /* LinkedAlias */:\r\n                if (context.braceNest > 0) {\r\n                    emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);\r\n                }\r\n                token = readTokenInLinked(scnr, context) || getEndToken(context);\r\n                context.braceNest = 0;\r\n                return token;\r\n            default:\r\n                let validNamedIdentifier = true;\r\n                let validListIdentifier = true;\r\n                let validLiteral = true;\r\n                if (isPluralStart(scnr)) {\r\n                    if (context.braceNest > 0) {\r\n                        emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);\r\n                    }\r\n                    token = getToken(context, 1 /* Pipe */, readPlural(scnr));\r\n                    // reset\r\n                    context.braceNest = 0;\r\n                    context.inLinked = false;\r\n                    return token;\r\n                }\r\n                if (context.braceNest > 0 &&\r\n                    (context.currentType === 5 /* Named */ ||\r\n                        context.currentType === 6 /* List */ ||\r\n                        context.currentType === 7 /* Literal */)) {\r\n                    emitError(6 /* UNTERMINATED_CLOSING_BRACE */, currentPosition(), 0);\r\n                    context.braceNest = 0;\r\n                    return readToken(scnr, context);\r\n                }\r\n                if ((validNamedIdentifier = isNamedIdentifierStart(scnr, context))) {\r\n                    token = getToken(context, 5 /* Named */, readNamedIdentifier(scnr));\r\n                    skipSpaces(scnr);\r\n                    return token;\r\n                }\r\n                if ((validListIdentifier = isListIdentifierStart(scnr, context))) {\r\n                    token = getToken(context, 6 /* List */, readListIdentifier(scnr));\r\n                    skipSpaces(scnr);\r\n                    return token;\r\n                }\r\n                if ((validLiteral = isLiteralStart(scnr, context))) {\r\n                    token = getToken(context, 7 /* Literal */, readLiteral(scnr));\r\n                    skipSpaces(scnr);\r\n                    return token;\r\n                }\r\n                if (!validNamedIdentifier && !validListIdentifier && !validLiteral) {\r\n                    // TODO: we should be re-designed invalid cases, when we will extend message syntax near the future ...\r\n                    token = getToken(context, 13 /* InvalidPlace */, readInvalidIdentifier(scnr));\r\n                    emitError(1 /* INVALID_TOKEN_IN_PLACEHOLDER */, currentPosition(), 0, token.value);\r\n                    skipSpaces(scnr);\r\n                    return token;\r\n                }\r\n                break;\r\n        }\r\n        return token;\r\n    }\r\n    // TODO: We need refactoring of token parsing ...\r\n    function readTokenInLinked(scnr, context) {\r\n        const { currentType } = context;\r\n        let token = null;\r\n        const ch = scnr.currentChar();\r\n        if ((currentType === 8 /* LinkedAlias */ ||\r\n            currentType === 9 /* LinkedDot */ ||\r\n            currentType === 12 /* LinkedModifier */ ||\r\n            currentType === 10 /* LinkedDelimiter */) &&\r\n            (ch === CHAR_LF || ch === CHAR_SP)) {\r\n            emitError(9 /* INVALID_LINKED_FORMAT */, currentPosition(), 0);\r\n        }\r\n        switch (ch) {\r\n            case \"@\" /* LinkedAlias */:\r\n                scnr.next();\r\n                token = getToken(context, 8 /* LinkedAlias */, \"@\" /* LinkedAlias */);\r\n                context.inLinked = true;\r\n                return token;\r\n            case \".\" /* LinkedDot */:\r\n                skipSpaces(scnr);\r\n                scnr.next();\r\n                return getToken(context, 9 /* LinkedDot */, \".\" /* LinkedDot */);\r\n            case \":\" /* LinkedDelimiter */:\r\n                skipSpaces(scnr);\r\n                scnr.next();\r\n                return getToken(context, 10 /* LinkedDelimiter */, \":\" /* LinkedDelimiter */);\r\n            default:\r\n                if (isPluralStart(scnr)) {\r\n                    token = getToken(context, 1 /* Pipe */, readPlural(scnr));\r\n                    // reset\r\n                    context.braceNest = 0;\r\n                    context.inLinked = false;\r\n                    return token;\r\n                }\r\n                if (isLinkedDotStart(scnr, context) ||\r\n                    isLinkedDelimiterStart(scnr, context)) {\r\n                    skipSpaces(scnr);\r\n                    return readTokenInLinked(scnr, context);\r\n                }\r\n                if (isLinkedModifierStart(scnr, context)) {\r\n                    skipSpaces(scnr);\r\n                    return getToken(context, 12 /* LinkedModifier */, readLinkedModifier(scnr));\r\n                }\r\n                if (isLinkedReferStart(scnr, context)) {\r\n                    skipSpaces(scnr);\r\n                    if (ch === \"{\" /* BraceLeft */) {\r\n                        // scan the placeholder\r\n                        return readTokenInPlaceholder(scnr, context) || token;\r\n                    }\r\n                    else {\r\n                        return getToken(context, 11 /* LinkedKey */, readLinkedRefer(scnr));\r\n                    }\r\n                }\r\n                if (currentType === 8 /* LinkedAlias */) {\r\n                    emitError(9 /* INVALID_LINKED_FORMAT */, currentPosition(), 0);\r\n                }\r\n                context.braceNest = 0;\r\n                context.inLinked = false;\r\n                return readToken(scnr, context);\r\n        }\r\n    }\r\n    // TODO: We need refactoring of token parsing ...\r\n    function readToken(scnr, context) {\r\n        let token = { type: 14 /* EOF */ };\r\n        if (context.braceNest > 0) {\r\n            return readTokenInPlaceholder(scnr, context) || getEndToken(context);\r\n        }\r\n        if (context.inLinked) {\r\n            return readTokenInLinked(scnr, context) || getEndToken(context);\r\n        }\r\n        const ch = scnr.currentChar();\r\n        switch (ch) {\r\n            case \"{\" /* BraceLeft */:\r\n                return readTokenInPlaceholder(scnr, context) || getEndToken(context);\r\n            case \"}\" /* BraceRight */:\r\n                emitError(5 /* UNBALANCED_CLOSING_BRACE */, currentPosition(), 0);\r\n                scnr.next();\r\n                return getToken(context, 3 /* BraceRight */, \"}\" /* BraceRight */);\r\n            case \"@\" /* LinkedAlias */:\r\n                return readTokenInLinked(scnr, context) || getEndToken(context);\r\n            default:\r\n                if (isPluralStart(scnr)) {\r\n                    token = getToken(context, 1 /* Pipe */, readPlural(scnr));\r\n                    // reset\r\n                    context.braceNest = 0;\r\n                    context.inLinked = false;\r\n                    return token;\r\n                }\r\n                if (isTextStart(scnr)) {\r\n                    return getToken(context, 0 /* Text */, readText(scnr));\r\n                }\r\n                if (ch === \"%\" /* Modulo */) {\r\n                    scnr.next();\r\n                    return getToken(context, 4 /* Modulo */, \"%\" /* Modulo */);\r\n                }\r\n                break;\r\n        }\r\n        return token;\r\n    }\r\n    function nextToken() {\r\n        const { currentType, offset, startLoc, endLoc } = _context;\r\n        _context.lastType = currentType;\r\n        _context.lastOffset = offset;\r\n        _context.lastStartLoc = startLoc;\r\n        _context.lastEndLoc = endLoc;\r\n        _context.offset = currentOffset();\r\n        _context.startLoc = currentPosition();\r\n        if (_scnr.currentChar() === EOF) {\r\n            return getToken(_context, 14 /* EOF */);\r\n        }\r\n        return readToken(_scnr, _context);\r\n    }\r\n    return {\r\n        nextToken,\r\n        currentOffset,\r\n        currentPosition,\r\n        context\r\n    };\r\n}\n\nconst ERROR_DOMAIN = 'parser';\r\n// Backslash backslash, backslash quote, uHHHH, UHHHHHH.\r\nconst KNOWN_ESCAPES = /(?:\\\\\\\\|\\\\'|\\\\u([0-9a-fA-F]{4})|\\\\U([0-9a-fA-F]{6}))/g;\r\nfunction fromEscapeSequence(match, codePoint4, codePoint6) {\r\n    switch (match) {\r\n        case `\\\\\\\\`:\r\n            return `\\\\`;\r\n        case `\\\\\\'`:\r\n            return `\\'`;\r\n        default: {\r\n            const codePoint = parseInt(codePoint4 || codePoint6, 16);\r\n            if (codePoint <= 0xd7ff || codePoint >= 0xe000) {\r\n                return String.fromCodePoint(codePoint);\r\n            }\r\n            // invalid ...\r\n            // Replace them with U+FFFD REPLACEMENT CHARACTER.\r\n            return '�';\r\n        }\r\n    }\r\n}\r\nfunction createParser(options = {}) {\r\n    const location = options.location !== false;\r\n    const { onError } = options;\r\n    function emitError(tokenzer, code, start, offset, ...args) {\r\n        const end = tokenzer.currentPosition();\r\n        end.offset += offset;\r\n        end.column += offset;\r\n        if (onError) {\r\n            const loc = createLocation(start, end);\r\n            const err = createCompileError(code, loc, {\r\n                domain: ERROR_DOMAIN,\r\n                args\r\n            });\r\n            onError(err);\r\n        }\r\n    }\r\n    function startNode(type, offset, loc) {\r\n        const node = {\r\n            type,\r\n            start: offset,\r\n            end: offset\r\n        };\r\n        if (location) {\r\n            node.loc = { start: loc, end: loc };\r\n        }\r\n        return node;\r\n    }\r\n    function endNode(node, offset, pos, type) {\r\n        node.end = offset;\r\n        if (type) {\r\n            node.type = type;\r\n        }\r\n        if (location && node.loc) {\r\n            node.loc.end = pos;\r\n        }\r\n    }\r\n    function parseText(tokenizer, value) {\r\n        const context = tokenizer.context();\r\n        const node = startNode(3 /* Text */, context.offset, context.startLoc);\r\n        node.value = value;\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    function parseList(tokenizer, index) {\r\n        const context = tokenizer.context();\r\n        const { lastOffset: offset, lastStartLoc: loc } = context; // get brace left loc\r\n        const node = startNode(5 /* List */, offset, loc);\r\n        node.index = parseInt(index, 10);\r\n        tokenizer.nextToken(); // skip brach right\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    function parseNamed(tokenizer, key) {\r\n        const context = tokenizer.context();\r\n        const { lastOffset: offset, lastStartLoc: loc } = context; // get brace left loc\r\n        const node = startNode(4 /* Named */, offset, loc);\r\n        node.key = key;\r\n        tokenizer.nextToken(); // skip brach right\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    function parseLiteral(tokenizer, value) {\r\n        const context = tokenizer.context();\r\n        const { lastOffset: offset, lastStartLoc: loc } = context; // get brace left loc\r\n        const node = startNode(9 /* Literal */, offset, loc);\r\n        node.value = value.replace(KNOWN_ESCAPES, fromEscapeSequence);\r\n        tokenizer.nextToken(); // skip brach right\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    function parseLinkedModifier(tokenizer) {\r\n        const token = tokenizer.nextToken();\r\n        const context = tokenizer.context();\r\n        const { lastOffset: offset, lastStartLoc: loc } = context; // get linked dot loc\r\n        const node = startNode(8 /* LinkedModifier */, offset, loc);\r\n        if (token.type !== 12 /* LinkedModifier */) {\r\n            // empty modifier\r\n            emitError(tokenizer, 11 /* UNEXPECTED_EMPTY_LINKED_MODIFIER */, context.lastStartLoc, 0);\r\n            node.value = '';\r\n            endNode(node, offset, loc);\r\n            return {\r\n                nextConsumeToken: token,\r\n                node\r\n            };\r\n        }\r\n        // check token\r\n        if (token.value == null) {\r\n            emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n        }\r\n        node.value = token.value || '';\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return {\r\n            node\r\n        };\r\n    }\r\n    function parseLinkedKey(tokenizer, value) {\r\n        const context = tokenizer.context();\r\n        const node = startNode(7 /* LinkedKey */, context.offset, context.startLoc);\r\n        node.value = value;\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    function parseLinked(tokenizer) {\r\n        const context = tokenizer.context();\r\n        const linkedNode = startNode(6 /* Linked */, context.offset, context.startLoc);\r\n        let token = tokenizer.nextToken();\r\n        if (token.type === 9 /* LinkedDot */) {\r\n            const parsed = parseLinkedModifier(tokenizer);\r\n            linkedNode.modifier = parsed.node;\r\n            token = parsed.nextConsumeToken || tokenizer.nextToken();\r\n        }\r\n        // asset check token\r\n        if (token.type !== 10 /* LinkedDelimiter */) {\r\n            emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n        }\r\n        token = tokenizer.nextToken();\r\n        // skip brace left\r\n        if (token.type === 2 /* BraceLeft */) {\r\n            token = tokenizer.nextToken();\r\n        }\r\n        switch (token.type) {\r\n            case 11 /* LinkedKey */:\r\n                if (token.value == null) {\r\n                    emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                }\r\n                linkedNode.key = parseLinkedKey(tokenizer, token.value || '');\r\n                break;\r\n            case 5 /* Named */:\r\n                if (token.value == null) {\r\n                    emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                }\r\n                linkedNode.key = parseNamed(tokenizer, token.value || '');\r\n                break;\r\n            case 6 /* List */:\r\n                if (token.value == null) {\r\n                    emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                }\r\n                linkedNode.key = parseList(tokenizer, token.value || '');\r\n                break;\r\n            case 7 /* Literal */:\r\n                if (token.value == null) {\r\n                    emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                }\r\n                linkedNode.key = parseLiteral(tokenizer, token.value || '');\r\n                break;\r\n            default:\r\n                // empty key\r\n                emitError(tokenizer, 12 /* UNEXPECTED_EMPTY_LINKED_KEY */, context.lastStartLoc, 0);\r\n                const nextContext = tokenizer.context();\r\n                const emptyLinkedKeyNode = startNode(7 /* LinkedKey */, nextContext.offset, nextContext.startLoc);\r\n                emptyLinkedKeyNode.value = '';\r\n                endNode(emptyLinkedKeyNode, nextContext.offset, nextContext.startLoc);\r\n                linkedNode.key = emptyLinkedKeyNode;\r\n                endNode(linkedNode, nextContext.offset, nextContext.startLoc);\r\n                return {\r\n                    nextConsumeToken: token,\r\n                    node: linkedNode\r\n                };\r\n        }\r\n        endNode(linkedNode, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return {\r\n            node: linkedNode\r\n        };\r\n    }\r\n    function parseMessage(tokenizer) {\r\n        const context = tokenizer.context();\r\n        const startOffset = context.currentType === 1 /* Pipe */\r\n            ? tokenizer.currentOffset()\r\n            : context.offset;\r\n        const startLoc = context.currentType === 1 /* Pipe */\r\n            ? context.endLoc\r\n            : context.startLoc;\r\n        const node = startNode(2 /* Message */, startOffset, startLoc);\r\n        node.items = [];\r\n        let nextToken = null;\r\n        do {\r\n            const token = nextToken || tokenizer.nextToken();\r\n            nextToken = null;\r\n            switch (token.type) {\r\n                case 0 /* Text */:\r\n                    if (token.value == null) {\r\n                        emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                    }\r\n                    node.items.push(parseText(tokenizer, token.value || ''));\r\n                    break;\r\n                case 6 /* List */:\r\n                    if (token.value == null) {\r\n                        emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                    }\r\n                    node.items.push(parseList(tokenizer, token.value || ''));\r\n                    break;\r\n                case 5 /* Named */:\r\n                    if (token.value == null) {\r\n                        emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                    }\r\n                    node.items.push(parseNamed(tokenizer, token.value || ''));\r\n                    break;\r\n                case 7 /* Literal */:\r\n                    if (token.value == null) {\r\n                        emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, getTokenCaption(token));\r\n                    }\r\n                    node.items.push(parseLiteral(tokenizer, token.value || ''));\r\n                    break;\r\n                case 8 /* LinkedAlias */:\r\n                    const parsed = parseLinked(tokenizer);\r\n                    node.items.push(parsed.node);\r\n                    nextToken = parsed.nextConsumeToken || null;\r\n                    break;\r\n            }\r\n        } while (context.currentType !== 14 /* EOF */ &&\r\n            context.currentType !== 1 /* Pipe */);\r\n        // adjust message node loc\r\n        const endOffset = context.currentType === 1 /* Pipe */\r\n            ? context.lastOffset\r\n            : tokenizer.currentOffset();\r\n        const endLoc = context.currentType === 1 /* Pipe */\r\n            ? context.lastEndLoc\r\n            : tokenizer.currentPosition();\r\n        endNode(node, endOffset, endLoc);\r\n        return node;\r\n    }\r\n    function parsePlural(tokenizer, offset, loc, msgNode) {\r\n        const context = tokenizer.context();\r\n        let hasEmptyMessage = msgNode.items.length === 0;\r\n        const node = startNode(1 /* Plural */, offset, loc);\r\n        node.cases = [];\r\n        node.cases.push(msgNode);\r\n        do {\r\n            const msg = parseMessage(tokenizer);\r\n            if (!hasEmptyMessage) {\r\n                hasEmptyMessage = msg.items.length === 0;\r\n            }\r\n            node.cases.push(msg);\r\n        } while (context.currentType !== 14 /* EOF */);\r\n        if (hasEmptyMessage) {\r\n            emitError(tokenizer, 10 /* MUST_HAVE_MESSAGES_IN_PLURAL */, loc, 0);\r\n        }\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    function parseResource(tokenizer) {\r\n        const context = tokenizer.context();\r\n        const { offset, startLoc } = context;\r\n        const msgNode = parseMessage(tokenizer);\r\n        if (context.currentType === 14 /* EOF */) {\r\n            return msgNode;\r\n        }\r\n        else {\r\n            return parsePlural(tokenizer, offset, startLoc, msgNode);\r\n        }\r\n    }\r\n    function parse(source) {\r\n        const tokenizer = createTokenizer(source, assign({}, options));\r\n        const context = tokenizer.context();\r\n        const node = startNode(0 /* Resource */, context.offset, context.startLoc);\r\n        if (location && node.loc) {\r\n            node.loc.source = source;\r\n        }\r\n        node.body = parseResource(tokenizer);\r\n        // assert whether achieved to EOF\r\n        if (context.currentType !== 14 /* EOF */) {\r\n            emitError(tokenizer, 13 /* UNEXPECTED_LEXICAL_ANALYSIS */, context.lastStartLoc, 0, source[context.offset] || '');\r\n        }\r\n        endNode(node, tokenizer.currentOffset(), tokenizer.currentPosition());\r\n        return node;\r\n    }\r\n    return { parse };\r\n}\r\nfunction getTokenCaption(token) {\r\n    if (token.type === 14 /* EOF */) {\r\n        return 'EOF';\r\n    }\r\n    const name = (token.value || '').replace(/\\r?\\n/gu, '\\\\n');\r\n    return name.length > 10 ? name.slice(0, 9) + '…' : name;\r\n}\n\nfunction createTransformer(ast, options = {} // eslint-disable-line\r\n) {\r\n    const _context = {\r\n        ast,\r\n        helpers: new Set()\r\n    };\r\n    const context = () => _context;\r\n    const helper = (name) => {\r\n        _context.helpers.add(name);\r\n        return name;\r\n    };\r\n    return { context, helper };\r\n}\r\nfunction traverseNodes(nodes, transformer) {\r\n    for (let i = 0; i < nodes.length; i++) {\r\n        traverseNode(nodes[i], transformer);\r\n    }\r\n}\r\nfunction traverseNode(node, transformer) {\r\n    // TODO: if we need pre-hook of transform, should be implemented to here\r\n    switch (node.type) {\r\n        case 1 /* Plural */:\r\n            traverseNodes(node.cases, transformer);\r\n            transformer.helper(\"plural\" /* PLURAL */);\r\n            break;\r\n        case 2 /* Message */:\r\n            traverseNodes(node.items, transformer);\r\n            break;\r\n        case 6 /* Linked */:\r\n            const linked = node;\r\n            traverseNode(linked.key, transformer);\r\n            transformer.helper(\"linked\" /* LINKED */);\r\n            break;\r\n        case 5 /* List */:\r\n            transformer.helper(\"interpolate\" /* INTERPOLATE */);\r\n            transformer.helper(\"list\" /* LIST */);\r\n            break;\r\n        case 4 /* Named */:\r\n            transformer.helper(\"interpolate\" /* INTERPOLATE */);\r\n            transformer.helper(\"named\" /* NAMED */);\r\n            break;\r\n    }\r\n    // TODO: if we need post-hook of transform, should be implemented to here\r\n}\r\n// transform AST\r\nfunction transform(ast, options = {} // eslint-disable-line\r\n) {\r\n    const transformer = createTransformer(ast);\r\n    transformer.helper(\"normalize\" /* NORMALIZE */);\r\n    // traverse\r\n    ast.body && traverseNode(ast.body, transformer);\r\n    // set meta information\r\n    const context = transformer.context();\r\n    ast.helpers = Array.from(context.helpers);\r\n}\n\nfunction createCodeGenerator(ast, options) {\r\n    const { sourceMap, filename, breakLineCode, needIndent: _needIndent } = options;\r\n    const _context = {\r\n        source: ast.loc.source,\r\n        filename,\r\n        code: '',\r\n        column: 1,\r\n        line: 1,\r\n        offset: 0,\r\n        map: undefined,\r\n        breakLineCode,\r\n        needIndent: _needIndent,\r\n        indentLevel: 0\r\n    };\r\n    const context = () => _context;\r\n    function push(code, node) {\r\n        _context.code += code;\r\n    }\r\n    function _newline(n, withBreakLine = true) {\r\n        const _breakLineCode = withBreakLine ? breakLineCode : '';\r\n        push(_needIndent ? _breakLineCode + `  `.repeat(n) : _breakLineCode);\r\n    }\r\n    function indent(withNewLine = true) {\r\n        const level = ++_context.indentLevel;\r\n        withNewLine && _newline(level);\r\n    }\r\n    function deindent(withNewLine = true) {\r\n        const level = --_context.indentLevel;\r\n        withNewLine && _newline(level);\r\n    }\r\n    function newline() {\r\n        _newline(_context.indentLevel);\r\n    }\r\n    const helper = (key) => `_${key}`;\r\n    const needIndent = () => _context.needIndent;\r\n    return {\r\n        context,\r\n        push,\r\n        indent,\r\n        deindent,\r\n        newline,\r\n        helper,\r\n        needIndent\r\n    };\r\n}\r\nfunction generateLinkedNode(generator, node) {\r\n    const { helper } = generator;\r\n    generator.push(`${helper(\"linked\" /* LINKED */)}(`);\r\n    generateNode(generator, node.key);\r\n    if (node.modifier) {\r\n        generator.push(`, `);\r\n        generateNode(generator, node.modifier);\r\n    }\r\n    generator.push(`)`);\r\n}\r\nfunction generateMessageNode(generator, node) {\r\n    const { helper, needIndent } = generator;\r\n    generator.push(`${helper(\"normalize\" /* NORMALIZE */)}([`);\r\n    generator.indent(needIndent());\r\n    const length = node.items.length;\r\n    for (let i = 0; i < length; i++) {\r\n        generateNode(generator, node.items[i]);\r\n        if (i === length - 1) {\r\n            break;\r\n        }\r\n        generator.push(', ');\r\n    }\r\n    generator.deindent(needIndent());\r\n    generator.push('])');\r\n}\r\nfunction generatePluralNode(generator, node) {\r\n    const { helper, needIndent } = generator;\r\n    if (node.cases.length > 1) {\r\n        generator.push(`${helper(\"plural\" /* PLURAL */)}([`);\r\n        generator.indent(needIndent());\r\n        const length = node.cases.length;\r\n        for (let i = 0; i < length; i++) {\r\n            generateNode(generator, node.cases[i]);\r\n            if (i === length - 1) {\r\n                break;\r\n            }\r\n            generator.push(', ');\r\n        }\r\n        generator.deindent(needIndent());\r\n        generator.push(`])`);\r\n    }\r\n}\r\nfunction generateResource(generator, node) {\r\n    if (node.body) {\r\n        generateNode(generator, node.body);\r\n    }\r\n    else {\r\n        generator.push('null');\r\n    }\r\n}\r\nfunction generateNode(generator, node) {\r\n    const { helper } = generator;\r\n    switch (node.type) {\r\n        case 0 /* Resource */:\r\n            generateResource(generator, node);\r\n            break;\r\n        case 1 /* Plural */:\r\n            generatePluralNode(generator, node);\r\n            break;\r\n        case 2 /* Message */:\r\n            generateMessageNode(generator, node);\r\n            break;\r\n        case 6 /* Linked */:\r\n            generateLinkedNode(generator, node);\r\n            break;\r\n        case 8 /* LinkedModifier */:\r\n            generator.push(JSON.stringify(node.value), node);\r\n            break;\r\n        case 7 /* LinkedKey */:\r\n            generator.push(JSON.stringify(node.value), node);\r\n            break;\r\n        case 5 /* List */:\r\n            generator.push(`${helper(\"interpolate\" /* INTERPOLATE */)}(${helper(\"list\" /* LIST */)}(${node.index}))`, node);\r\n            break;\r\n        case 4 /* Named */:\r\n            generator.push(`${helper(\"interpolate\" /* INTERPOLATE */)}(${helper(\"named\" /* NAMED */)}(${JSON.stringify(node.key)}))`, node);\r\n            break;\r\n        case 9 /* Literal */:\r\n            generator.push(JSON.stringify(node.value), node);\r\n            break;\r\n        case 3 /* Text */:\r\n            generator.push(JSON.stringify(node.value), node);\r\n            break;\r\n        default:\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                throw new Error(`unhandled codegen node type: ${node.type}`);\r\n            }\r\n    }\r\n}\r\n// generate code from AST\r\nconst generate = (ast, options = {} // eslint-disable-line\r\n) => {\r\n    const mode = isString(options.mode) ? options.mode : 'normal';\r\n    const filename = isString(options.filename)\r\n        ? options.filename\r\n        : 'message.intl';\r\n    const sourceMap = !!options.sourceMap;\r\n    // prettier-ignore\r\n    const breakLineCode = options.breakLineCode != null\r\n        ? options.breakLineCode\r\n        : mode === 'arrow'\r\n            ? ';'\r\n            : '\\n';\r\n    const needIndent = options.needIndent ? options.needIndent : mode !== 'arrow';\r\n    const helpers = ast.helpers || [];\r\n    const generator = createCodeGenerator(ast, {\r\n        mode,\r\n        filename,\r\n        sourceMap,\r\n        breakLineCode,\r\n        needIndent\r\n    });\r\n    generator.push(mode === 'normal' ? `function __msg__ (ctx) {` : `(ctx) => {`);\r\n    generator.indent(needIndent);\r\n    if (helpers.length > 0) {\r\n        generator.push(`const { ${helpers.map(s => `${s}: _${s}`).join(', ')} } = ctx`);\r\n        generator.newline();\r\n    }\r\n    generator.push(`return `);\r\n    generateNode(generator, ast);\r\n    generator.deindent(needIndent);\r\n    generator.push(`}`);\r\n    const { code, map } = generator.context();\r\n    return {\r\n        ast,\r\n        code,\r\n        map: map ? map.toJSON() : undefined // eslint-disable-line @typescript-eslint/no-explicit-any\r\n    };\r\n};\n\nfunction baseCompile(source, options = {}) {\r\n    const assignedOptions = assign({}, options);\r\n    // parse source codes\r\n    const parser = createParser(assignedOptions);\r\n    const ast = parser.parse(source);\r\n    // transform ASTs\r\n    transform(ast, assignedOptions);\r\n    // generate javascript codes\r\n    return generate(ast, assignedOptions);\r\n}\n\nexport { ERROR_DOMAIN, LocationStub, baseCompile, createCompileError, createLocation, createParser, createPosition, defaultOnError, errorMessages };\n","/*!\n  * @intlify/message-resolver v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\n/**\r\n * Original Utilities\r\n * written by kazuya kawaguchi\r\n */\r\nif ((process.env.NODE_ENV !== 'production')) ;\r\nconst hasOwnProperty = Object.prototype.hasOwnProperty;\r\nfunction hasOwn(obj, key) {\r\n    return hasOwnProperty.call(obj, key);\r\n}\r\nconst isObject = (val) => // eslint-disable-line\r\n val !== null && typeof val === 'object';\n\nconst pathStateMachine = [];\r\npathStateMachine[0 /* BEFORE_PATH */] = {\r\n    [\"w\" /* WORKSPACE */]: [0 /* BEFORE_PATH */],\r\n    [\"i\" /* IDENT */]: [3 /* IN_IDENT */, 0 /* APPEND */],\r\n    [\"[\" /* LEFT_BRACKET */]: [4 /* IN_SUB_PATH */],\r\n    [\"o\" /* END_OF_FAIL */]: [7 /* AFTER_PATH */]\r\n};\r\npathStateMachine[1 /* IN_PATH */] = {\r\n    [\"w\" /* WORKSPACE */]: [1 /* IN_PATH */],\r\n    [\".\" /* DOT */]: [2 /* BEFORE_IDENT */],\r\n    [\"[\" /* LEFT_BRACKET */]: [4 /* IN_SUB_PATH */],\r\n    [\"o\" /* END_OF_FAIL */]: [7 /* AFTER_PATH */]\r\n};\r\npathStateMachine[2 /* BEFORE_IDENT */] = {\r\n    [\"w\" /* WORKSPACE */]: [2 /* BEFORE_IDENT */],\r\n    [\"i\" /* IDENT */]: [3 /* IN_IDENT */, 0 /* APPEND */],\r\n    [\"0\" /* ZERO */]: [3 /* IN_IDENT */, 0 /* APPEND */]\r\n};\r\npathStateMachine[3 /* IN_IDENT */] = {\r\n    [\"i\" /* IDENT */]: [3 /* IN_IDENT */, 0 /* APPEND */],\r\n    [\"0\" /* ZERO */]: [3 /* IN_IDENT */, 0 /* APPEND */],\r\n    [\"w\" /* WORKSPACE */]: [1 /* IN_PATH */, 1 /* PUSH */],\r\n    [\".\" /* DOT */]: [2 /* BEFORE_IDENT */, 1 /* PUSH */],\r\n    [\"[\" /* LEFT_BRACKET */]: [4 /* IN_SUB_PATH */, 1 /* PUSH */],\r\n    [\"o\" /* END_OF_FAIL */]: [7 /* AFTER_PATH */, 1 /* PUSH */]\r\n};\r\npathStateMachine[4 /* IN_SUB_PATH */] = {\r\n    [\"'\" /* SINGLE_QUOTE */]: [5 /* IN_SINGLE_QUOTE */, 0 /* APPEND */],\r\n    [\"\\\"\" /* DOUBLE_QUOTE */]: [6 /* IN_DOUBLE_QUOTE */, 0 /* APPEND */],\r\n    [\"[\" /* LEFT_BRACKET */]: [\r\n        4 /* IN_SUB_PATH */,\r\n        2 /* INC_SUB_PATH_DEPTH */\r\n    ],\r\n    [\"]\" /* RIGHT_BRACKET */]: [1 /* IN_PATH */, 3 /* PUSH_SUB_PATH */],\r\n    [\"o\" /* END_OF_FAIL */]: 8 /* ERROR */,\r\n    [\"l\" /* ELSE */]: [4 /* IN_SUB_PATH */, 0 /* APPEND */]\r\n};\r\npathStateMachine[5 /* IN_SINGLE_QUOTE */] = {\r\n    [\"'\" /* SINGLE_QUOTE */]: [4 /* IN_SUB_PATH */, 0 /* APPEND */],\r\n    [\"o\" /* END_OF_FAIL */]: 8 /* ERROR */,\r\n    [\"l\" /* ELSE */]: [5 /* IN_SINGLE_QUOTE */, 0 /* APPEND */]\r\n};\r\npathStateMachine[6 /* IN_DOUBLE_QUOTE */] = {\r\n    [\"\\\"\" /* DOUBLE_QUOTE */]: [4 /* IN_SUB_PATH */, 0 /* APPEND */],\r\n    [\"o\" /* END_OF_FAIL */]: 8 /* ERROR */,\r\n    [\"l\" /* ELSE */]: [6 /* IN_DOUBLE_QUOTE */, 0 /* APPEND */]\r\n};\r\n/**\r\n * Check if an expression is a literal value.\r\n */\r\nconst literalValueRE = /^\\s?(?:true|false|-?[\\d.]+|'[^']*'|\"[^\"]*\")\\s?$/;\r\nfunction isLiteral(exp) {\r\n    return literalValueRE.test(exp);\r\n}\r\n/**\r\n * Strip quotes from a string\r\n */\r\nfunction stripQuotes(str) {\r\n    const a = str.charCodeAt(0);\r\n    const b = str.charCodeAt(str.length - 1);\r\n    return a === b && (a === 0x22 || a === 0x27) ? str.slice(1, -1) : str;\r\n}\r\n/**\r\n * Determine the type of a character in a keypath.\r\n */\r\nfunction getPathCharType(ch) {\r\n    if (ch === undefined || ch === null) {\r\n        return \"o\" /* END_OF_FAIL */;\r\n    }\r\n    const code = ch.charCodeAt(0);\r\n    switch (code) {\r\n        case 0x5b: // [\r\n        case 0x5d: // ]\r\n        case 0x2e: // .\r\n        case 0x22: // \"\r\n        case 0x27: // '\r\n            return ch;\r\n        case 0x5f: // _\r\n        case 0x24: // $\r\n        case 0x2d: // -\r\n            return \"i\" /* IDENT */;\r\n        case 0x09: // Tab (HT)\r\n        case 0x0a: // Newline (LF)\r\n        case 0x0d: // Return (CR)\r\n        case 0xa0: // No-break space (NBSP)\r\n        case 0xfeff: // Byte Order Mark (BOM)\r\n        case 0x2028: // Line Separator (LS)\r\n        case 0x2029: // Paragraph Separator (PS)\r\n            return \"w\" /* WORKSPACE */;\r\n    }\r\n    return \"i\" /* IDENT */;\r\n}\r\n/**\r\n * Format a subPath, return its plain form if it is\r\n * a literal string or number. Otherwise prepend the\r\n * dynamic indicator (*).\r\n */\r\nfunction formatSubPath(path) {\r\n    const trimmed = path.trim();\r\n    // invalid leading 0\r\n    if (path.charAt(0) === '0' && isNaN(parseInt(path))) {\r\n        return false;\r\n    }\r\n    return isLiteral(trimmed)\r\n        ? stripQuotes(trimmed)\r\n        : \"*\" /* ASTARISK */ + trimmed;\r\n}\r\n/**\r\n * Parse a string path into an array of segments\r\n */\r\nfunction parse(path) {\r\n    const keys = [];\r\n    let index = -1;\r\n    let mode = 0 /* BEFORE_PATH */;\r\n    let subPathDepth = 0;\r\n    let c;\r\n    let key; // eslint-disable-line\r\n    let newChar;\r\n    let type;\r\n    let transition;\r\n    let action;\r\n    let typeMap;\r\n    const actions = [];\r\n    actions[0 /* APPEND */] = () => {\r\n        if (key === undefined) {\r\n            key = newChar;\r\n        }\r\n        else {\r\n            key += newChar;\r\n        }\r\n    };\r\n    actions[1 /* PUSH */] = () => {\r\n        if (key !== undefined) {\r\n            keys.push(key);\r\n            key = undefined;\r\n        }\r\n    };\r\n    actions[2 /* INC_SUB_PATH_DEPTH */] = () => {\r\n        actions[0 /* APPEND */]();\r\n        subPathDepth++;\r\n    };\r\n    actions[3 /* PUSH_SUB_PATH */] = () => {\r\n        if (subPathDepth > 0) {\r\n            subPathDepth--;\r\n            mode = 4 /* IN_SUB_PATH */;\r\n            actions[0 /* APPEND */]();\r\n        }\r\n        else {\r\n            subPathDepth = 0;\r\n            if (key === undefined) {\r\n                return false;\r\n            }\r\n            key = formatSubPath(key);\r\n            if (key === false) {\r\n                return false;\r\n            }\r\n            else {\r\n                actions[1 /* PUSH */]();\r\n            }\r\n        }\r\n    };\r\n    function maybeUnescapeQuote() {\r\n        const nextChar = path[index + 1];\r\n        if ((mode === 5 /* IN_SINGLE_QUOTE */ &&\r\n            nextChar === \"'\" /* SINGLE_QUOTE */) ||\r\n            (mode === 6 /* IN_DOUBLE_QUOTE */ &&\r\n                nextChar === \"\\\"\" /* DOUBLE_QUOTE */)) {\r\n            index++;\r\n            newChar = '\\\\' + nextChar;\r\n            actions[0 /* APPEND */]();\r\n            return true;\r\n        }\r\n    }\r\n    while (mode !== null) {\r\n        index++;\r\n        c = path[index];\r\n        if (c === '\\\\' && maybeUnescapeQuote()) {\r\n            continue;\r\n        }\r\n        type = getPathCharType(c);\r\n        typeMap = pathStateMachine[mode];\r\n        transition = typeMap[type] || typeMap[\"l\" /* ELSE */] || 8 /* ERROR */;\r\n        // check parse error\r\n        if (transition === 8 /* ERROR */) {\r\n            return;\r\n        }\r\n        mode = transition[0];\r\n        if (transition[1] !== undefined) {\r\n            action = actions[transition[1]];\r\n            if (action) {\r\n                newChar = c;\r\n                if (action() === false) {\r\n                    return;\r\n                }\r\n            }\r\n        }\r\n        // check parse finish\r\n        if (mode === 7 /* AFTER_PATH */) {\r\n            return keys;\r\n        }\r\n    }\r\n}\r\n// path token cache\r\nconst cache = new Map();\r\nfunction resolveValue(obj, path) {\r\n    // check object\r\n    if (!isObject(obj)) {\r\n        return null;\r\n    }\r\n    // parse path\r\n    let hit = cache.get(path);\r\n    if (!hit) {\r\n        hit = parse(path);\r\n        if (hit) {\r\n            cache.set(path, hit);\r\n        }\r\n    }\r\n    // check hit\r\n    if (!hit) {\r\n        return null;\r\n    }\r\n    // resolve path value\r\n    const len = hit.length;\r\n    let last = obj;\r\n    let i = 0;\r\n    while (i < len) {\r\n        const val = last[hit[i]];\r\n        if (val === undefined) {\r\n            return null;\r\n        }\r\n        last = val;\r\n        i++;\r\n    }\r\n    return last;\r\n}\r\n/**\r\n * Transform flat json in obj to normal json in obj\r\n */\r\nfunction handleFlatJson(obj) {\r\n    // check obj\r\n    if (!isObject(obj)) {\r\n        return obj;\r\n    }\r\n    for (const key in obj) {\r\n        // check key\r\n        if (!hasOwn(obj, key)) {\r\n            continue;\r\n        }\r\n        // handle for normal json\r\n        if (!key.includes(\".\" /* DOT */)) {\r\n            // recursive process value if value is also a object\r\n            if (isObject(obj[key])) {\r\n                handleFlatJson(obj[key]);\r\n            }\r\n        }\r\n        // handle for flat json, transform to normal json\r\n        else {\r\n            // go to the last object\r\n            const subKeys = key.split(\".\" /* DOT */);\r\n            const lastIndex = subKeys.length - 1;\r\n            let currentObj = obj;\r\n            for (let i = 0; i < lastIndex; i++) {\r\n                if (!(subKeys[i] in currentObj)) {\r\n                    currentObj[subKeys[i]] = {};\r\n                }\r\n                currentObj = currentObj[subKeys[i]];\r\n            }\r\n            // update last object value, delete old property\r\n            currentObj[subKeys[lastIndex]] = obj[key];\r\n            delete obj[key];\r\n            // recursive process value if value is also a object\r\n            if (isObject(currentObj[subKeys[lastIndex]])) {\r\n                handleFlatJson(currentObj[subKeys[lastIndex]]);\r\n            }\r\n        }\r\n    }\r\n    return obj;\r\n}\n\nexport { handleFlatJson, parse, resolveValue };\n","/*!\n  * @intlify/runtime v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\nimport { isNumber, isObject, isString, isFunction, isPlainObject, toDisplayString } from '@intlify/shared';\n\nconst DEFAULT_MODIFIER = (str) => str;\r\nconst DEFAULT_MESSAGE = (ctx) => ''; // eslint-disable-line\r\nconst DEFAULT_MESSAGE_DATA_TYPE = 'text';\r\nconst DEFAULT_NORMALIZE = (values) => values.length === 0 ? '' : values.join('');\r\nconst DEFAULT_INTERPOLATE = toDisplayString;\r\nfunction pluralDefault(choice, choicesLength) {\r\n    choice = Math.abs(choice);\r\n    if (choicesLength === 2) {\r\n        // prettier-ignore\r\n        return choice\r\n            ? choice > 1\r\n                ? 1\r\n                : 0\r\n            : 1;\r\n    }\r\n    return choice ? Math.min(choice, 2) : 0;\r\n}\r\nfunction getPluralIndex(options) {\r\n    // prettier-ignore\r\n    const index = isNumber(options.pluralIndex)\r\n        ? options.pluralIndex\r\n        : -1;\r\n    // prettier-ignore\r\n    return options.named && (isNumber(options.named.count) || isNumber(options.named.n))\r\n        ? isNumber(options.named.count)\r\n            ? options.named.count\r\n            : isNumber(options.named.n)\r\n                ? options.named.n\r\n                : index\r\n        : index;\r\n}\r\nfunction normalizeNamed(pluralIndex, props) {\r\n    if (!props.count) {\r\n        props.count = pluralIndex;\r\n    }\r\n    if (!props.n) {\r\n        props.n = pluralIndex;\r\n    }\r\n}\r\nfunction createMessageContext(options = {}) {\r\n    const locale = options.locale;\r\n    const pluralIndex = getPluralIndex(options);\r\n    const pluralRule = isObject(options.pluralRules) &&\r\n        isString(locale) &&\r\n        isFunction(options.pluralRules[locale])\r\n        ? options.pluralRules[locale]\r\n        : pluralDefault;\r\n    const orgPluralRule = isObject(options.pluralRules) &&\r\n        isString(locale) &&\r\n        isFunction(options.pluralRules[locale])\r\n        ? pluralDefault\r\n        : undefined;\r\n    const plural = (messages) => messages[pluralRule(pluralIndex, messages.length, orgPluralRule)];\r\n    const _list = options.list || [];\r\n    const list = (index) => _list[index];\r\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n    const _named = options.named || {};\r\n    isNumber(options.pluralIndex) && normalizeNamed(pluralIndex, _named);\r\n    const named = (key) => _named[key];\r\n    // TODO: need to design resolve message function?\r\n    function message(key) {\r\n        // prettier-ignore\r\n        const msg = isFunction(options.messages)\r\n            ? options.messages(key)\r\n            : isObject(options.messages)\r\n                ? options.messages[key]\r\n                : false;\r\n        return !msg\r\n            ? options.parent\r\n                ? options.parent.message(key) // resolve from parent messages\r\n                : DEFAULT_MESSAGE\r\n            : msg;\r\n    }\r\n    const _modifier = (name) => options.modifiers\r\n        ? options.modifiers[name]\r\n        : DEFAULT_MODIFIER;\r\n    const normalize = isPlainObject(options.processor) && isFunction(options.processor.normalize)\r\n        ? options.processor.normalize\r\n        : DEFAULT_NORMALIZE;\r\n    const interpolate = isPlainObject(options.processor) &&\r\n        isFunction(options.processor.interpolate)\r\n        ? options.processor.interpolate\r\n        : DEFAULT_INTERPOLATE;\r\n    const type = isPlainObject(options.processor) && isString(options.processor.type)\r\n        ? options.processor.type\r\n        : DEFAULT_MESSAGE_DATA_TYPE;\r\n    const ctx = {\r\n        [\"list\" /* LIST */]: list,\r\n        [\"named\" /* NAMED */]: named,\r\n        [\"plural\" /* PLURAL */]: plural,\r\n        [\"linked\" /* LINKED */]: (key, modifier) => {\r\n            // TODO: should check `key`\r\n            const msg = message(key)(ctx);\r\n            return isString(modifier) ? _modifier(modifier)(msg) : msg;\r\n        },\r\n        [\"message\" /* MESSAGE */]: message,\r\n        [\"type\" /* TYPE */]: type,\r\n        [\"interpolate\" /* INTERPOLATE */]: interpolate,\r\n        [\"normalize\" /* NORMALIZE */]: normalize\r\n    };\r\n    return ctx;\r\n}\n\nexport { DEFAULT_MESSAGE_DATA_TYPE, createMessageContext };\n","/*!\n  * @intlify/devtools-if v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\nconst IntlifyDevToolsHooks = {\r\n    I18nInit: 'i18n:init',\r\n    FunctionTranslate: 'function:translate'\r\n};\n\nexport { IntlifyDevToolsHooks };\n","/*!\n  * @intlify/core-base v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\nimport { resolveValue } from '@intlify/message-resolver';\nexport * from '@intlify/message-resolver';\nimport { createMessageContext } from '@intlify/runtime';\nexport * from '@intlify/runtime';\nimport { defaultOnError, baseCompile, createCompileError } from '@intlify/message-compiler';\nexport { createCompileError } from '@intlify/message-compiler';\nimport { format, isString, isArray, isPlainObject, assign, isFunction, isBoolean, isRegExp, warn, isObject, escapeHtml, inBrowser, mark, measure, generateCodeFrame, generateFormatCacheKey, isNumber, isEmptyObject, isDate } from '@intlify/shared';\nimport { IntlifyDevToolsHooks } from '@intlify/devtools-if';\n\nlet devtools = null;\r\nfunction setDevToolsHook(hook) {\r\n    devtools = hook;\r\n}\r\nfunction getDevToolsHook() {\r\n    return devtools;\r\n}\r\nfunction initI18nDevTools(i18n, version, meta) {\r\n    // TODO: queue if devtools is undefined\r\n    devtools &&\r\n        devtools.emit(IntlifyDevToolsHooks.I18nInit, {\r\n            timestamp: Date.now(),\r\n            i18n,\r\n            version,\r\n            meta\r\n        });\r\n}\r\nconst translateDevTools = /* #__PURE__*/ createDevToolsHook(IntlifyDevToolsHooks.FunctionTranslate);\r\nfunction createDevToolsHook(hook) {\r\n    return (payloads) => devtools && devtools.emit(hook, payloads);\r\n}\n\n/** @internal */\r\nconst warnMessages = {\r\n    [0 /* NOT_FOUND_KEY */]: `Not found '{key}' key in '{locale}' locale messages.`,\r\n    [1 /* FALLBACK_TO_TRANSLATE */]: `Fall back to translate '{key}' key with '{target}' locale.`,\r\n    [2 /* CANNOT_FORMAT_NUMBER */]: `Cannot format a number value due to not supported Intl.NumberFormat.`,\r\n    [3 /* FALLBACK_TO_NUMBER_FORMAT */]: `Fall back to number format '{key}' key with '{target}' locale.`,\r\n    [4 /* CANNOT_FORMAT_DATE */]: `Cannot format a date value due to not supported Intl.DateTimeFormat.`,\r\n    [5 /* FALLBACK_TO_DATE_FORMAT */]: `Fall back to datetime format '{key}' key with '{target}' locale.`\r\n};\r\nfunction getWarnMessage(code, ...args) {\r\n    return format(warnMessages[code], ...args);\r\n}\n\n/**\r\n * Intlify core-base version\r\n * @internal\r\n */\r\nconst VERSION = '9.1.6';\r\nconst NOT_REOSLVED = -1;\r\nconst MISSING_RESOLVE_VALUE = '';\r\nfunction getDefaultLinkedModifiers() {\r\n    return {\r\n        upper: (val) => (isString(val) ? val.toUpperCase() : val),\r\n        lower: (val) => (isString(val) ? val.toLowerCase() : val),\r\n        // prettier-ignore\r\n        capitalize: (val) => (isString(val)\r\n            ? `${val.charAt(0).toLocaleUpperCase()}${val.substr(1)}`\r\n            : val)\r\n    };\r\n}\r\nlet _compiler;\r\nfunction registerMessageCompiler(compiler) {\r\n    _compiler = compiler;\r\n}\r\n// Additional Meta for Intlify DevTools\r\nlet _additionalMeta = null;\r\nconst setAdditionalMeta = /* #__PURE__*/ (meta) => {\r\n    _additionalMeta = meta;\r\n};\r\nconst getAdditionalMeta = /* #__PURE__*/ () => _additionalMeta;\r\n// ID for CoreContext\r\nlet _cid = 0;\r\nfunction createCoreContext(options = {}) {\r\n    // setup options\r\n    const version = isString(options.version) ? options.version : VERSION;\r\n    const locale = isString(options.locale) ? options.locale : 'en-US';\r\n    const fallbackLocale = isArray(options.fallbackLocale) ||\r\n        isPlainObject(options.fallbackLocale) ||\r\n        isString(options.fallbackLocale) ||\r\n        options.fallbackLocale === false\r\n        ? options.fallbackLocale\r\n        : locale;\r\n    const messages = isPlainObject(options.messages)\r\n        ? options.messages\r\n        : { [locale]: {} };\r\n    const datetimeFormats = isPlainObject(options.datetimeFormats)\r\n        ? options.datetimeFormats\r\n        : { [locale]: {} };\r\n    const numberFormats = isPlainObject(options.numberFormats)\r\n        ? options.numberFormats\r\n        : { [locale]: {} };\r\n    const modifiers = assign({}, options.modifiers || {}, getDefaultLinkedModifiers());\r\n    const pluralRules = options.pluralRules || {};\r\n    const missing = isFunction(options.missing) ? options.missing : null;\r\n    const missingWarn = isBoolean(options.missingWarn) || isRegExp(options.missingWarn)\r\n        ? options.missingWarn\r\n        : true;\r\n    const fallbackWarn = isBoolean(options.fallbackWarn) || isRegExp(options.fallbackWarn)\r\n        ? options.fallbackWarn\r\n        : true;\r\n    const fallbackFormat = !!options.fallbackFormat;\r\n    const unresolving = !!options.unresolving;\r\n    const postTranslation = isFunction(options.postTranslation)\r\n        ? options.postTranslation\r\n        : null;\r\n    const processor = isPlainObject(options.processor) ? options.processor : null;\r\n    const warnHtmlMessage = isBoolean(options.warnHtmlMessage)\r\n        ? options.warnHtmlMessage\r\n        : true;\r\n    const escapeParameter = !!options.escapeParameter;\r\n    const messageCompiler = isFunction(options.messageCompiler)\r\n        ? options.messageCompiler\r\n        : _compiler;\r\n    const onWarn = isFunction(options.onWarn) ? options.onWarn : warn;\r\n    // setup internal options\r\n    const internalOptions = options;\r\n    const __datetimeFormatters = isObject(internalOptions.__datetimeFormatters)\r\n        ? internalOptions.__datetimeFormatters\r\n        : new Map();\r\n    const __numberFormatters = isObject(internalOptions.__numberFormatters)\r\n        ? internalOptions.__numberFormatters\r\n        : new Map();\r\n    const __meta = isObject(internalOptions.__meta) ? internalOptions.__meta : {};\r\n    _cid++;\r\n    const context = {\r\n        version,\r\n        cid: _cid,\r\n        locale,\r\n        fallbackLocale,\r\n        messages,\r\n        datetimeFormats,\r\n        numberFormats,\r\n        modifiers,\r\n        pluralRules,\r\n        missing,\r\n        missingWarn,\r\n        fallbackWarn,\r\n        fallbackFormat,\r\n        unresolving,\r\n        postTranslation,\r\n        processor,\r\n        warnHtmlMessage,\r\n        escapeParameter,\r\n        messageCompiler,\r\n        onWarn,\r\n        __datetimeFormatters,\r\n        __numberFormatters,\r\n        __meta\r\n    };\r\n    // for vue-devtools timeline event\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        context.__v_emitter =\r\n            internalOptions.__v_emitter != null\r\n                ? internalOptions.__v_emitter\r\n                : undefined;\r\n    }\r\n    // NOTE: experimental !!\r\n    if ((process.env.NODE_ENV !== 'production') || __INTLIFY_PROD_DEVTOOLS__) {\r\n        initI18nDevTools(context, version, __meta);\r\n    }\r\n    return context;\r\n}\r\n/** @internal */\r\nfunction isTranslateFallbackWarn(fallback, key) {\r\n    return fallback instanceof RegExp ? fallback.test(key) : fallback;\r\n}\r\n/** @internal */\r\nfunction isTranslateMissingWarn(missing, key) {\r\n    return missing instanceof RegExp ? missing.test(key) : missing;\r\n}\r\n/** @internal */\r\nfunction handleMissing(context, key, locale, missingWarn, type) {\r\n    const { missing, onWarn } = context;\r\n    // for vue-devtools timeline event\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        const emitter = context.__v_emitter;\r\n        if (emitter) {\r\n            emitter.emit(\"missing\" /* MISSING */, {\r\n                locale,\r\n                key,\r\n                type,\r\n                groupId: `${type}:${key}`\r\n            });\r\n        }\r\n    }\r\n    if (missing !== null) {\r\n        const ret = missing(context, locale, key, type);\r\n        return isString(ret) ? ret : key;\r\n    }\r\n    else {\r\n        if ((process.env.NODE_ENV !== 'production') && isTranslateMissingWarn(missingWarn, key)) {\r\n            onWarn(getWarnMessage(0 /* NOT_FOUND_KEY */, { key, locale }));\r\n        }\r\n        return key;\r\n    }\r\n}\r\n/** @internal */\r\nfunction getLocaleChain(ctx, fallback, start) {\r\n    const context = ctx;\r\n    if (!context.__localeChainCache) {\r\n        context.__localeChainCache = new Map();\r\n    }\r\n    let chain = context.__localeChainCache.get(start);\r\n    if (!chain) {\r\n        chain = [];\r\n        // first block defined by start\r\n        let block = [start];\r\n        // while any intervening block found\r\n        while (isArray(block)) {\r\n            block = appendBlockToChain(chain, block, fallback);\r\n        }\r\n        // prettier-ignore\r\n        // last block defined by default\r\n        const defaults = isArray(fallback)\r\n            ? fallback\r\n            : isPlainObject(fallback)\r\n                ? fallback['default']\r\n                    ? fallback['default']\r\n                    : null\r\n                : fallback;\r\n        // convert defaults to array\r\n        block = isString(defaults) ? [defaults] : defaults;\r\n        if (isArray(block)) {\r\n            appendBlockToChain(chain, block, false);\r\n        }\r\n        context.__localeChainCache.set(start, chain);\r\n    }\r\n    return chain;\r\n}\r\nfunction appendBlockToChain(chain, block, blocks) {\r\n    let follow = true;\r\n    for (let i = 0; i < block.length && isBoolean(follow); i++) {\r\n        const locale = block[i];\r\n        if (isString(locale)) {\r\n            follow = appendLocaleToChain(chain, block[i], blocks);\r\n        }\r\n    }\r\n    return follow;\r\n}\r\nfunction appendLocaleToChain(chain, locale, blocks) {\r\n    let follow;\r\n    const tokens = locale.split('-');\r\n    do {\r\n        const target = tokens.join('-');\r\n        follow = appendItemToChain(chain, target, blocks);\r\n        tokens.splice(-1, 1);\r\n    } while (tokens.length && follow === true);\r\n    return follow;\r\n}\r\nfunction appendItemToChain(chain, target, blocks) {\r\n    let follow = false;\r\n    if (!chain.includes(target)) {\r\n        follow = true;\r\n        if (target) {\r\n            follow = target[target.length - 1] !== '!';\r\n            const locale = target.replace(/!/g, '');\r\n            chain.push(locale);\r\n            if ((isArray(blocks) || isPlainObject(blocks)) &&\r\n                blocks[locale] // eslint-disable-line @typescript-eslint/no-explicit-any\r\n            ) {\r\n                // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n                follow = blocks[locale];\r\n            }\r\n        }\r\n    }\r\n    return follow;\r\n}\r\n/** @internal */\r\nfunction updateFallbackLocale(ctx, locale, fallback) {\r\n    const context = ctx;\r\n    context.__localeChainCache = new Map();\r\n    getLocaleChain(ctx, fallback, locale);\r\n}\n\nconst RE_HTML_TAG = /<\\/?[\\w\\s=\"/.':;#-\\/]+>/;\r\nconst WARN_MESSAGE = `Detected HTML in '{source}' message. Recommend not using HTML messages to avoid XSS.`;\r\nfunction checkHtmlMessage(source, options) {\r\n    const warnHtmlMessage = isBoolean(options.warnHtmlMessage)\r\n        ? options.warnHtmlMessage\r\n        : true;\r\n    if (warnHtmlMessage && RE_HTML_TAG.test(source)) {\r\n        warn(format(WARN_MESSAGE, { source }));\r\n    }\r\n}\r\nconst defaultOnCacheKey = (source) => source;\r\nlet compileCache = Object.create(null);\r\nfunction clearCompileCache() {\r\n    compileCache = Object.create(null);\r\n}\r\nfunction compileToFunction(source, options = {}) {\r\n    {\r\n        // check HTML message\r\n        (process.env.NODE_ENV !== 'production') && checkHtmlMessage(source, options);\r\n        // check caches\r\n        const onCacheKey = options.onCacheKey || defaultOnCacheKey;\r\n        const key = onCacheKey(source);\r\n        const cached = compileCache[key];\r\n        if (cached) {\r\n            return cached;\r\n        }\r\n        // compile error detecting\r\n        let occurred = false;\r\n        const onError = options.onError || defaultOnError;\r\n        options.onError = (err) => {\r\n            occurred = true;\r\n            onError(err);\r\n        };\r\n        // compile\r\n        const { code } = baseCompile(source, options);\r\n        // evaluate function\r\n        const msg = new Function(`return ${code}`)();\r\n        // if occurred compile error, don't cache\r\n        return !occurred ? (compileCache[key] = msg) : msg;\r\n    }\r\n}\n\nfunction createCoreError(code) {\r\n    return createCompileError(code, null, (process.env.NODE_ENV !== 'production') ? { messages: errorMessages } : undefined);\r\n}\r\n/** @internal */\r\nconst errorMessages = {\r\n    [14 /* INVALID_ARGUMENT */]: 'Invalid arguments',\r\n    [15 /* INVALID_DATE_ARGUMENT */]: 'The date provided is an invalid Date object.' +\r\n        'Make sure your Date represents a valid date.',\r\n    [16 /* INVALID_ISO_DATE_ARGUMENT */]: 'The argument provided is not a valid ISO date string'\r\n};\n\nconst NOOP_MESSAGE_FUNCTION = () => '';\r\nconst isMessageFunction = (val) => isFunction(val);\r\n// implementation of `translate` function\r\nfunction translate(context, ...args) {\r\n    const { fallbackFormat, postTranslation, unresolving, fallbackLocale, messages } = context;\r\n    const [key, options] = parseTranslateArgs(...args);\r\n    const missingWarn = isBoolean(options.missingWarn)\r\n        ? options.missingWarn\r\n        : context.missingWarn;\r\n    const fallbackWarn = isBoolean(options.fallbackWarn)\r\n        ? options.fallbackWarn\r\n        : context.fallbackWarn;\r\n    const escapeParameter = isBoolean(options.escapeParameter)\r\n        ? options.escapeParameter\r\n        : context.escapeParameter;\r\n    const resolvedMessage = !!options.resolvedMessage;\r\n    // prettier-ignore\r\n    const defaultMsgOrKey = isString(options.default) || isBoolean(options.default) // default by function option\r\n        ? !isBoolean(options.default)\r\n            ? options.default\r\n            : key\r\n        : fallbackFormat // default by `fallbackFormat` option\r\n            ? key\r\n            : '';\r\n    const enableDefaultMsg = fallbackFormat || defaultMsgOrKey !== '';\r\n    const locale = isString(options.locale) ? options.locale : context.locale;\r\n    // escape params\r\n    escapeParameter && escapeParams(options);\r\n    // resolve message format\r\n    // eslint-disable-next-line prefer-const\r\n    let [format, targetLocale, message] = !resolvedMessage\r\n        ? resolveMessageFormat(context, key, locale, fallbackLocale, fallbackWarn, missingWarn)\r\n        : [\r\n            key,\r\n            locale,\r\n            messages[locale] || {}\r\n        ];\r\n    // if you use default message, set it as message format!\r\n    let cacheBaseKey = key;\r\n    if (!resolvedMessage &&\r\n        !(isString(format) || isMessageFunction(format))) {\r\n        if (enableDefaultMsg) {\r\n            format = defaultMsgOrKey;\r\n            cacheBaseKey = format;\r\n        }\r\n    }\r\n    // checking message format and target locale\r\n    if (!resolvedMessage &&\r\n        (!(isString(format) || isMessageFunction(format)) ||\r\n            !isString(targetLocale))) {\r\n        return unresolving ? NOT_REOSLVED : key;\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && isString(format) && context.messageCompiler == null) {\r\n        warn(`The message format compilation is not supported in this build. ` +\r\n            `Because message compiler isn't included. ` +\r\n            `You need to pre-compilation all message format. ` +\r\n            `So translate function return '${key}'.`);\r\n        return key;\r\n    }\r\n    // setup compile error detecting\r\n    let occurred = false;\r\n    const errorDetector = () => {\r\n        occurred = true;\r\n    };\r\n    // compile message format\r\n    const msg = !isMessageFunction(format)\r\n        ? compileMessageFormat(context, key, targetLocale, format, cacheBaseKey, errorDetector)\r\n        : format;\r\n    // if occurred compile error, return the message format\r\n    if (occurred) {\r\n        return format;\r\n    }\r\n    // evaluate message with context\r\n    const ctxOptions = getMessageContextOptions(context, targetLocale, message, options);\r\n    const msgContext = createMessageContext(ctxOptions);\r\n    const messaged = evaluateMessage(context, msg, msgContext);\r\n    // if use post translation option, proceed it with handler\r\n    const ret = postTranslation ? postTranslation(messaged) : messaged;\r\n    // NOTE: experimental !!\r\n    if ((process.env.NODE_ENV !== 'production') || __INTLIFY_PROD_DEVTOOLS__) {\r\n        // prettier-ignore\r\n        const payloads = {\r\n            timestamp: Date.now(),\r\n            key: isString(key)\r\n                ? key\r\n                : isMessageFunction(format)\r\n                    ? format.key\r\n                    : '',\r\n            locale: targetLocale || (isMessageFunction(format)\r\n                ? format.locale\r\n                : ''),\r\n            format: isString(format)\r\n                ? format\r\n                : isMessageFunction(format)\r\n                    ? format.source\r\n                    : '',\r\n            message: ret\r\n        };\r\n        payloads.meta = assign({}, context.__meta, getAdditionalMeta() || {});\r\n        translateDevTools(payloads);\r\n    }\r\n    return ret;\r\n}\r\nfunction escapeParams(options) {\r\n    if (isArray(options.list)) {\r\n        options.list = options.list.map(item => isString(item) ? escapeHtml(item) : item);\r\n    }\r\n    else if (isObject(options.named)) {\r\n        Object.keys(options.named).forEach(key => {\r\n            if (isString(options.named[key])) {\r\n                options.named[key] = escapeHtml(options.named[key]);\r\n            }\r\n        });\r\n    }\r\n}\r\nfunction resolveMessageFormat(context, key, locale, fallbackLocale, fallbackWarn, missingWarn) {\r\n    const { messages, onWarn } = context;\r\n    const locales = getLocaleChain(context, fallbackLocale, locale);\r\n    let message = {};\r\n    let targetLocale;\r\n    let format = null;\r\n    let from = locale;\r\n    let to = null;\r\n    const type = 'translate';\r\n    for (let i = 0; i < locales.length; i++) {\r\n        targetLocale = to = locales[i];\r\n        if ((process.env.NODE_ENV !== 'production') &&\r\n            locale !== targetLocale &&\r\n            isTranslateFallbackWarn(fallbackWarn, key)) {\r\n            onWarn(getWarnMessage(1 /* FALLBACK_TO_TRANSLATE */, {\r\n                key,\r\n                target: targetLocale\r\n            }));\r\n        }\r\n        // for vue-devtools timeline event\r\n        if ((process.env.NODE_ENV !== 'production') && locale !== targetLocale) {\r\n            const emitter = context.__v_emitter;\r\n            if (emitter) {\r\n                emitter.emit(\"fallback\" /* FALBACK */, {\r\n                    type,\r\n                    key,\r\n                    from,\r\n                    to,\r\n                    groupId: `${type}:${key}`\r\n                });\r\n            }\r\n        }\r\n        message =\r\n            messages[targetLocale] || {};\r\n        // for vue-devtools timeline event\r\n        let start = null;\r\n        let startTag;\r\n        let endTag;\r\n        if ((process.env.NODE_ENV !== 'production') && inBrowser) {\r\n            start = window.performance.now();\r\n            startTag = 'intlify-message-resolve-start';\r\n            endTag = 'intlify-message-resolve-end';\r\n            mark && mark(startTag);\r\n        }\r\n        if ((format = resolveValue(message, key)) === null) {\r\n            // if null, resolve with object key path\r\n            format = message[key]; // eslint-disable-line @typescript-eslint/no-explicit-any\r\n        }\r\n        // for vue-devtools timeline event\r\n        if ((process.env.NODE_ENV !== 'production') && inBrowser) {\r\n            const end = window.performance.now();\r\n            const emitter = context.__v_emitter;\r\n            if (emitter && start && format) {\r\n                emitter.emit(\"message-resolve\" /* MESSAGE_RESOLVE */, {\r\n                    type: \"message-resolve\" /* MESSAGE_RESOLVE */,\r\n                    key,\r\n                    message: format,\r\n                    time: end - start,\r\n                    groupId: `${type}:${key}`\r\n                });\r\n            }\r\n            if (startTag && endTag && mark && measure) {\r\n                mark(endTag);\r\n                measure('intlify message resolve', startTag, endTag);\r\n            }\r\n        }\r\n        if (isString(format) || isFunction(format))\r\n            break;\r\n        const missingRet = handleMissing(context, key, targetLocale, missingWarn, type);\r\n        if (missingRet !== key) {\r\n            format = missingRet;\r\n        }\r\n        from = to;\r\n    }\r\n    return [format, targetLocale, message];\r\n}\r\nfunction compileMessageFormat(context, key, targetLocale, format, cacheBaseKey, errorDetector) {\r\n    const { messageCompiler, warnHtmlMessage } = context;\r\n    if (isMessageFunction(format)) {\r\n        const msg = format;\r\n        msg.locale = msg.locale || targetLocale;\r\n        msg.key = msg.key || key;\r\n        return msg;\r\n    }\r\n    // for vue-devtools timeline event\r\n    let start = null;\r\n    let startTag;\r\n    let endTag;\r\n    if ((process.env.NODE_ENV !== 'production') && inBrowser) {\r\n        start = window.performance.now();\r\n        startTag = 'intlify-message-compilation-start';\r\n        endTag = 'intlify-message-compilation-end';\r\n        mark && mark(startTag);\r\n    }\r\n    const msg = messageCompiler(format, getCompileOptions(context, targetLocale, cacheBaseKey, format, warnHtmlMessage, errorDetector));\r\n    // for vue-devtools timeline event\r\n    if ((process.env.NODE_ENV !== 'production') && inBrowser) {\r\n        const end = window.performance.now();\r\n        const emitter = context.__v_emitter;\r\n        if (emitter && start) {\r\n            emitter.emit(\"message-compilation\" /* MESSAGE_COMPILATION */, {\r\n                type: \"message-compilation\" /* MESSAGE_COMPILATION */,\r\n                message: format,\r\n                time: end - start,\r\n                groupId: `${'translate'}:${key}`\r\n            });\r\n        }\r\n        if (startTag && endTag && mark && measure) {\r\n            mark(endTag);\r\n            measure('intlify message compilation', startTag, endTag);\r\n        }\r\n    }\r\n    msg.locale = targetLocale;\r\n    msg.key = key;\r\n    msg.source = format;\r\n    return msg;\r\n}\r\nfunction evaluateMessage(context, msg, msgCtx) {\r\n    // for vue-devtools timeline event\r\n    let start = null;\r\n    let startTag;\r\n    let endTag;\r\n    if ((process.env.NODE_ENV !== 'production') && inBrowser) {\r\n        start = window.performance.now();\r\n        startTag = 'intlify-message-evaluation-start';\r\n        endTag = 'intlify-message-evaluation-end';\r\n        mark && mark(startTag);\r\n    }\r\n    const messaged = msg(msgCtx);\r\n    // for vue-devtools timeline event\r\n    if ((process.env.NODE_ENV !== 'production') && inBrowser) {\r\n        const end = window.performance.now();\r\n        const emitter = context.__v_emitter;\r\n        if (emitter && start) {\r\n            emitter.emit(\"message-evaluation\" /* MESSAGE_EVALUATION */, {\r\n                type: \"message-evaluation\" /* MESSAGE_EVALUATION */,\r\n                value: messaged,\r\n                time: end - start,\r\n                groupId: `${'translate'}:${msg.key}`\r\n            });\r\n        }\r\n        if (startTag && endTag && mark && measure) {\r\n            mark(endTag);\r\n            measure('intlify message evaluation', startTag, endTag);\r\n        }\r\n    }\r\n    return messaged;\r\n}\r\n/** @internal */\r\nfunction parseTranslateArgs(...args) {\r\n    const [arg1, arg2, arg3] = args;\r\n    const options = {};\r\n    if (!isString(arg1) && !isNumber(arg1) && !isMessageFunction(arg1)) {\r\n        throw createCoreError(14 /* INVALID_ARGUMENT */);\r\n    }\r\n    // prettier-ignore\r\n    const key = isNumber(arg1)\r\n        ? String(arg1)\r\n        : isMessageFunction(arg1)\r\n            ? arg1\r\n            : arg1;\r\n    if (isNumber(arg2)) {\r\n        options.plural = arg2;\r\n    }\r\n    else if (isString(arg2)) {\r\n        options.default = arg2;\r\n    }\r\n    else if (isPlainObject(arg2) && !isEmptyObject(arg2)) {\r\n        options.named = arg2;\r\n    }\r\n    else if (isArray(arg2)) {\r\n        options.list = arg2;\r\n    }\r\n    if (isNumber(arg3)) {\r\n        options.plural = arg3;\r\n    }\r\n    else if (isString(arg3)) {\r\n        options.default = arg3;\r\n    }\r\n    else if (isPlainObject(arg3)) {\r\n        assign(options, arg3);\r\n    }\r\n    return [key, options];\r\n}\r\nfunction getCompileOptions(context, locale, key, source, warnHtmlMessage, errorDetector) {\r\n    return {\r\n        warnHtmlMessage,\r\n        onError: (err) => {\r\n            errorDetector && errorDetector(err);\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                const message = `Message compilation error: ${err.message}`;\r\n                const codeFrame = err.location &&\r\n                    generateCodeFrame(source, err.location.start.offset, err.location.end.offset);\r\n                const emitter = context\r\n                    .__v_emitter;\r\n                if (emitter) {\r\n                    emitter.emit(\"compile-error\" /* COMPILE_ERROR */, {\r\n                        message: source,\r\n                        error: err.message,\r\n                        start: err.location && err.location.start.offset,\r\n                        end: err.location && err.location.end.offset,\r\n                        groupId: `${'translate'}:${key}`\r\n                    });\r\n                }\r\n                console.error(codeFrame ? `${message}\\n${codeFrame}` : message);\r\n            }\r\n            else {\r\n                throw err;\r\n            }\r\n        },\r\n        onCacheKey: (source) => generateFormatCacheKey(locale, key, source)\r\n    };\r\n}\r\nfunction getMessageContextOptions(context, locale, message, options) {\r\n    const { modifiers, pluralRules } = context;\r\n    const resolveMessage = (key) => {\r\n        const val = resolveValue(message, key);\r\n        if (isString(val)) {\r\n            let occurred = false;\r\n            const errorDetector = () => {\r\n                occurred = true;\r\n            };\r\n            const msg = compileMessageFormat(context, key, locale, val, key, errorDetector);\r\n            return !occurred\r\n                ? msg\r\n                : NOOP_MESSAGE_FUNCTION;\r\n        }\r\n        else if (isMessageFunction(val)) {\r\n            return val;\r\n        }\r\n        else {\r\n            // TODO: should be implemented warning message\r\n            return NOOP_MESSAGE_FUNCTION;\r\n        }\r\n    };\r\n    const ctxOptions = {\r\n        locale,\r\n        modifiers,\r\n        pluralRules,\r\n        messages: resolveMessage\r\n    };\r\n    if (context.processor) {\r\n        ctxOptions.processor = context.processor;\r\n    }\r\n    if (options.list) {\r\n        ctxOptions.list = options.list;\r\n    }\r\n    if (options.named) {\r\n        ctxOptions.named = options.named;\r\n    }\r\n    if (isNumber(options.plural)) {\r\n        ctxOptions.pluralIndex = options.plural;\r\n    }\r\n    return ctxOptions;\r\n}\n\nconst intlDefined = typeof Intl !== 'undefined';\r\nconst Availabilities = {\r\n    dateTimeFormat: intlDefined && typeof Intl.DateTimeFormat !== 'undefined',\r\n    numberFormat: intlDefined && typeof Intl.NumberFormat !== 'undefined'\r\n};\n\n// implementation of `datetime` function\r\nfunction datetime(context, ...args) {\r\n    const { datetimeFormats, unresolving, fallbackLocale, onWarn } = context;\r\n    const { __datetimeFormatters } = context;\r\n    if ((process.env.NODE_ENV !== 'production') && !Availabilities.dateTimeFormat) {\r\n        onWarn(getWarnMessage(4 /* CANNOT_FORMAT_DATE */));\r\n        return MISSING_RESOLVE_VALUE;\r\n    }\r\n    const [key, value, options, overrides] = parseDateTimeArgs(...args);\r\n    const missingWarn = isBoolean(options.missingWarn)\r\n        ? options.missingWarn\r\n        : context.missingWarn;\r\n    const fallbackWarn = isBoolean(options.fallbackWarn)\r\n        ? options.fallbackWarn\r\n        : context.fallbackWarn;\r\n    const part = !!options.part;\r\n    const locale = isString(options.locale) ? options.locale : context.locale;\r\n    const locales = getLocaleChain(context, fallbackLocale, locale);\r\n    if (!isString(key) || key === '') {\r\n        return new Intl.DateTimeFormat(locale).format(value);\r\n    }\r\n    // resolve format\r\n    let datetimeFormat = {};\r\n    let targetLocale;\r\n    let format = null;\r\n    let from = locale;\r\n    let to = null;\r\n    const type = 'datetime format';\r\n    for (let i = 0; i < locales.length; i++) {\r\n        targetLocale = to = locales[i];\r\n        if ((process.env.NODE_ENV !== 'production') &&\r\n            locale !== targetLocale &&\r\n            isTranslateFallbackWarn(fallbackWarn, key)) {\r\n            onWarn(getWarnMessage(5 /* FALLBACK_TO_DATE_FORMAT */, {\r\n                key,\r\n                target: targetLocale\r\n            }));\r\n        }\r\n        // for vue-devtools timeline event\r\n        if ((process.env.NODE_ENV !== 'production') && locale !== targetLocale) {\r\n            const emitter = context.__v_emitter;\r\n            if (emitter) {\r\n                emitter.emit(\"fallback\" /* FALBACK */, {\r\n                    type,\r\n                    key,\r\n                    from,\r\n                    to,\r\n                    groupId: `${type}:${key}`\r\n                });\r\n            }\r\n        }\r\n        datetimeFormat =\r\n            datetimeFormats[targetLocale] || {};\r\n        format = datetimeFormat[key];\r\n        if (isPlainObject(format))\r\n            break;\r\n        handleMissing(context, key, targetLocale, missingWarn, type);\r\n        from = to;\r\n    }\r\n    // checking format and target locale\r\n    if (!isPlainObject(format) || !isString(targetLocale)) {\r\n        return unresolving ? NOT_REOSLVED : key;\r\n    }\r\n    let id = `${targetLocale}__${key}`;\r\n    if (!isEmptyObject(overrides)) {\r\n        id = `${id}__${JSON.stringify(overrides)}`;\r\n    }\r\n    let formatter = __datetimeFormatters.get(id);\r\n    if (!formatter) {\r\n        formatter = new Intl.DateTimeFormat(targetLocale, assign({}, format, overrides));\r\n        __datetimeFormatters.set(id, formatter);\r\n    }\r\n    return !part ? formatter.format(value) : formatter.formatToParts(value);\r\n}\r\n/** @internal */\r\nfunction parseDateTimeArgs(...args) {\r\n    const [arg1, arg2, arg3, arg4] = args;\r\n    let options = {};\r\n    let overrides = {};\r\n    let value;\r\n    if (isString(arg1)) {\r\n        // Only allow ISO strings - other date formats are often supported,\r\n        // but may cause different results in different browsers.\r\n        if (!/\\d{4}-\\d{2}-\\d{2}(T.*)?/.test(arg1)) {\r\n            throw createCoreError(16 /* INVALID_ISO_DATE_ARGUMENT */);\r\n        }\r\n        value = new Date(arg1);\r\n        try {\r\n            // This will fail if the date is not valid\r\n            value.toISOString();\r\n        }\r\n        catch (e) {\r\n            throw createCoreError(16 /* INVALID_ISO_DATE_ARGUMENT */);\r\n        }\r\n    }\r\n    else if (isDate(arg1)) {\r\n        if (isNaN(arg1.getTime())) {\r\n            throw createCoreError(15 /* INVALID_DATE_ARGUMENT */);\r\n        }\r\n        value = arg1;\r\n    }\r\n    else if (isNumber(arg1)) {\r\n        value = arg1;\r\n    }\r\n    else {\r\n        throw createCoreError(14 /* INVALID_ARGUMENT */);\r\n    }\r\n    if (isString(arg2)) {\r\n        options.key = arg2;\r\n    }\r\n    else if (isPlainObject(arg2)) {\r\n        options = arg2;\r\n    }\r\n    if (isString(arg3)) {\r\n        options.locale = arg3;\r\n    }\r\n    else if (isPlainObject(arg3)) {\r\n        overrides = arg3;\r\n    }\r\n    if (isPlainObject(arg4)) {\r\n        overrides = arg4;\r\n    }\r\n    return [options.key || '', value, options, overrides];\r\n}\r\n/** @internal */\r\nfunction clearDateTimeFormat(ctx, locale, format) {\r\n    const context = ctx;\r\n    for (const key in format) {\r\n        const id = `${locale}__${key}`;\r\n        if (!context.__datetimeFormatters.has(id)) {\r\n            continue;\r\n        }\r\n        context.__datetimeFormatters.delete(id);\r\n    }\r\n}\n\n// implementation of `number` function\r\nfunction number(context, ...args) {\r\n    const { numberFormats, unresolving, fallbackLocale, onWarn } = context;\r\n    const { __numberFormatters } = context;\r\n    if ((process.env.NODE_ENV !== 'production') && !Availabilities.numberFormat) {\r\n        onWarn(getWarnMessage(2 /* CANNOT_FORMAT_NUMBER */));\r\n        return MISSING_RESOLVE_VALUE;\r\n    }\r\n    const [key, value, options, overrides] = parseNumberArgs(...args);\r\n    const missingWarn = isBoolean(options.missingWarn)\r\n        ? options.missingWarn\r\n        : context.missingWarn;\r\n    const fallbackWarn = isBoolean(options.fallbackWarn)\r\n        ? options.fallbackWarn\r\n        : context.fallbackWarn;\r\n    const part = !!options.part;\r\n    const locale = isString(options.locale) ? options.locale : context.locale;\r\n    const locales = getLocaleChain(context, fallbackLocale, locale);\r\n    if (!isString(key) || key === '') {\r\n        return new Intl.NumberFormat(locale).format(value);\r\n    }\r\n    // resolve format\r\n    let numberFormat = {};\r\n    let targetLocale;\r\n    let format = null;\r\n    let from = locale;\r\n    let to = null;\r\n    const type = 'number format';\r\n    for (let i = 0; i < locales.length; i++) {\r\n        targetLocale = to = locales[i];\r\n        if ((process.env.NODE_ENV !== 'production') &&\r\n            locale !== targetLocale &&\r\n            isTranslateFallbackWarn(fallbackWarn, key)) {\r\n            onWarn(getWarnMessage(3 /* FALLBACK_TO_NUMBER_FORMAT */, {\r\n                key,\r\n                target: targetLocale\r\n            }));\r\n        }\r\n        // for vue-devtools timeline event\r\n        if ((process.env.NODE_ENV !== 'production') && locale !== targetLocale) {\r\n            const emitter = context.__v_emitter;\r\n            if (emitter) {\r\n                emitter.emit(\"fallback\" /* FALBACK */, {\r\n                    type,\r\n                    key,\r\n                    from,\r\n                    to,\r\n                    groupId: `${type}:${key}`\r\n                });\r\n            }\r\n        }\r\n        numberFormat =\r\n            numberFormats[targetLocale] || {};\r\n        format = numberFormat[key];\r\n        if (isPlainObject(format))\r\n            break;\r\n        handleMissing(context, key, targetLocale, missingWarn, type);\r\n        from = to;\r\n    }\r\n    // checking format and target locale\r\n    if (!isPlainObject(format) || !isString(targetLocale)) {\r\n        return unresolving ? NOT_REOSLVED : key;\r\n    }\r\n    let id = `${targetLocale}__${key}`;\r\n    if (!isEmptyObject(overrides)) {\r\n        id = `${id}__${JSON.stringify(overrides)}`;\r\n    }\r\n    let formatter = __numberFormatters.get(id);\r\n    if (!formatter) {\r\n        formatter = new Intl.NumberFormat(targetLocale, assign({}, format, overrides));\r\n        __numberFormatters.set(id, formatter);\r\n    }\r\n    return !part ? formatter.format(value) : formatter.formatToParts(value);\r\n}\r\n/** @internal */\r\nfunction parseNumberArgs(...args) {\r\n    const [arg1, arg2, arg3, arg4] = args;\r\n    let options = {};\r\n    let overrides = {};\r\n    if (!isNumber(arg1)) {\r\n        throw createCoreError(14 /* INVALID_ARGUMENT */);\r\n    }\r\n    const value = arg1;\r\n    if (isString(arg2)) {\r\n        options.key = arg2;\r\n    }\r\n    else if (isPlainObject(arg2)) {\r\n        options = arg2;\r\n    }\r\n    if (isString(arg3)) {\r\n        options.locale = arg3;\r\n    }\r\n    else if (isPlainObject(arg3)) {\r\n        overrides = arg3;\r\n    }\r\n    if (isPlainObject(arg4)) {\r\n        overrides = arg4;\r\n    }\r\n    return [options.key || '', value, options, overrides];\r\n}\r\n/** @internal */\r\nfunction clearNumberFormat(ctx, locale, format) {\r\n    const context = ctx;\r\n    for (const key in format) {\r\n        const id = `${locale}__${key}`;\r\n        if (!context.__numberFormatters.has(id)) {\r\n            continue;\r\n        }\r\n        context.__numberFormatters.delete(id);\r\n    }\r\n}\n\nexport { MISSING_RESOLVE_VALUE, NOT_REOSLVED, VERSION, clearCompileCache, clearDateTimeFormat, clearNumberFormat, compileToFunction, createCoreContext, createCoreError, datetime, getAdditionalMeta, getDevToolsHook, getLocaleChain, getWarnMessage, handleMissing, initI18nDevTools, isMessageFunction, isTranslateFallbackWarn, isTranslateMissingWarn, number, parseDateTimeArgs, parseNumberArgs, parseTranslateArgs, registerMessageCompiler, setAdditionalMeta, setDevToolsHook, translate, translateDevTools, updateFallbackLocale };\n","/*!\n  * @intlify/vue-devtools v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\nconst VueDevToolsLabels = {\r\n    [\"vue-devtools-plugin-vue-i18n\" /* PLUGIN */]: 'Vue I18n devtools',\r\n    [\"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */]: 'I18n Resources',\r\n    [\"vue-i18n-timeline\" /* TIMELINE */]: 'Vue I18n'\r\n};\r\nconst VueDevToolsPlaceholders = {\r\n    [\"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */]: 'Search for scopes ...'\r\n};\r\nconst VueDevToolsTimelineColors = {\r\n    [\"vue-i18n-timeline\" /* TIMELINE */]: 0xffcd19\r\n};\n\nexport { VueDevToolsLabels, VueDevToolsPlaceholders, VueDevToolsTimelineColors };\n","/*!\n  * vue-i18n v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\nimport { getGlobalThis, format, makeSymbol, isPlainObject, isArray, hasOwn, isObject, isBoolean, isString, isRegExp, isFunction, assign, isNumber, warn, createEmitter, isEmptyObject } from '@intlify/shared';\nimport { createCompileError, handleFlatJson, createCoreContext, updateFallbackLocale, resolveValue, clearDateTimeFormat, clearNumberFormat, setAdditionalMeta, NOT_REOSLVED, isTranslateFallbackWarn, isTranslateMissingWarn, parseTranslateArgs, translate, MISSING_RESOLVE_VALUE, parseDateTimeArgs, datetime, parseNumberArgs, number, getLocaleChain, registerMessageCompiler, compileToFunction, setDevToolsHook } from '@intlify/core-base';\nimport { ref, getCurrentInstance, computed, watch, createVNode, Text, h, Fragment, inject, onMounted, onUnmounted, isRef } from 'vue';\nimport { setupDevtoolsPlugin } from '@vue/devtools-api';\nimport { VueDevToolsLabels, VueDevToolsPlaceholders, VueDevToolsTimelineColors } from '@intlify/vue-devtools';\n\n/**\r\n * Vue I18n Version\r\n *\r\n * @remarks\r\n * Semver format. Same format as the package.json `version` field.\r\n *\r\n * @VueI18nGeneral\r\n */\r\nconst VERSION = '9.1.6';\r\n/**\r\n * This is only called in esm-bundler builds.\r\n * istanbul-ignore-next\r\n */\r\nfunction initFeatureFlags() {\r\n    let needWarn = false;\r\n    if (typeof __VUE_I18N_FULL_INSTALL__ !== 'boolean') {\r\n        needWarn = true;\r\n        getGlobalThis().__VUE_I18N_FULL_INSTALL__ = true;\r\n    }\r\n    if (typeof __VUE_I18N_LEGACY_API__ !== 'boolean') {\r\n        needWarn = true;\r\n        getGlobalThis().__VUE_I18N_LEGACY_API__ = true;\r\n    }\r\n    if (typeof __VUE_I18N_PROD_DEVTOOLS__ !== 'boolean') {\r\n        needWarn = true;\r\n        getGlobalThis().__VUE_I18N_PROD_DEVTOOLS__ = false;\r\n    }\r\n    if (typeof __INTLIFY_PROD_DEVTOOLS__ !== 'boolean') {\r\n        getGlobalThis().__INTLIFY_PROD_DEVTOOLS__ = false;\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && typeof true === 'boolean') {\r\n        needWarn = true;\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && needWarn) {\r\n        console.warn(`You are running the esm-bundler build of vue-i18n. It is recommended to ` +\r\n            `configure your bundler to explicitly replace feature flag globals ` +\r\n            `with boolean literals to get proper tree-shaking in the final bundle.`);\r\n    }\r\n}\n\nconst warnMessages = {\r\n    [6 /* FALLBACK_TO_ROOT */]: `Fall back to {type} '{key}' with root locale.`,\r\n    [7 /* NOT_SUPPORTED_PRESERVE */]: `Not supported 'preserve'.`,\r\n    [8 /* NOT_SUPPORTED_FORMATTER */]: `Not supported 'formatter'.`,\r\n    [9 /* NOT_SUPPORTED_PRESERVE_DIRECTIVE */]: `Not supported 'preserveDirectiveContent'.`,\r\n    [10 /* NOT_SUPPORTED_GET_CHOICE_INDEX */]: `Not supported 'getChoiceIndex'.`,\r\n    [11 /* COMPONENT_NAME_LEGACY_COMPATIBLE */]: `Component name legacy compatible: '{name}' -> 'i18n'`,\r\n    [12 /* NOT_FOUND_PARENT_SCOPE */]: `Not found parent scope. use the global scope.`\r\n};\r\nfunction getWarnMessage(code, ...args) {\r\n    return format(warnMessages[code], ...args);\r\n}\n\nfunction createI18nError(code, ...args) {\r\n    return createCompileError(code, null, (process.env.NODE_ENV !== 'production') ? { messages: errorMessages, args } : undefined);\r\n}\r\nconst errorMessages = {\r\n    [14 /* UNEXPECTED_RETURN_TYPE */]: 'Unexpected return type in composer',\r\n    [15 /* INVALID_ARGUMENT */]: 'Invalid argument',\r\n    [16 /* MUST_BE_CALL_SETUP_TOP */]: 'Must be called at the top of a `setup` function',\r\n    [17 /* NOT_INSLALLED */]: 'Need to install with `app.use` function',\r\n    [22 /* UNEXPECTED_ERROR */]: 'Unexpected error',\r\n    [18 /* NOT_AVAILABLE_IN_LEGACY_MODE */]: 'Not available in legacy mode',\r\n    [19 /* REQUIRED_VALUE */]: `Required in value: {0}`,\r\n    [20 /* INVALID_VALUE */]: `Invalid value`,\r\n    [21 /* CANNOT_SETUP_VUE_DEVTOOLS_PLUGIN */]: `Cannot setup vue-devtools plugin`\r\n};\n\nconst DEVTOOLS_META = '__INTLIFY_META__';\r\nconst TransrateVNodeSymbol = makeSymbol('__transrateVNode');\r\nconst DatetimePartsSymbol = makeSymbol('__datetimeParts');\r\nconst NumberPartsSymbol = makeSymbol('__numberParts');\r\nconst EnableEmitter = makeSymbol('__enableEmitter');\r\nconst DisableEmitter = makeSymbol('__disableEmitter');\r\nconst SetPluralRulesSymbol = makeSymbol('__setPluralRules');\r\nmakeSymbol('__intlifyMeta');\r\nlet composerID = 0;\r\nfunction defineCoreMissingHandler(missing) {\r\n    return ((ctx, locale, key, type) => {\r\n        return missing(locale, key, getCurrentInstance() || undefined, type);\r\n    });\r\n}\r\nfunction getLocaleMessages(locale, options) {\r\n    const { messages, __i18n } = options;\r\n    // prettier-ignore\r\n    const ret = isPlainObject(messages)\r\n        ? messages\r\n        : isArray(__i18n)\r\n            ? {}\r\n            : { [locale]: {} };\r\n    // merge locale messages of i18n custom block\r\n    if (isArray(__i18n)) {\r\n        __i18n.forEach(({ locale, resource }) => {\r\n            if (locale) {\r\n                ret[locale] = ret[locale] || {};\r\n                deepCopy(resource, ret[locale]);\r\n            }\r\n            else {\r\n                deepCopy(resource, ret);\r\n            }\r\n        });\r\n    }\r\n    // handle messages for flat json\r\n    if (options.flatJson) {\r\n        for (const key in ret) {\r\n            if (hasOwn(ret, key)) {\r\n                handleFlatJson(ret[key]);\r\n            }\r\n        }\r\n    }\r\n    return ret;\r\n}\r\nconst isNotObjectOrIsArray = (val) => !isObject(val) || isArray(val);\r\n// eslint-disable-next-line @typescript-eslint/no-explicit-any\r\nfunction deepCopy(src, des) {\r\n    // src and des should both be objects, and non of then can be a array\r\n    if (isNotObjectOrIsArray(src) || isNotObjectOrIsArray(des)) {\r\n        throw createI18nError(20 /* INVALID_VALUE */);\r\n    }\r\n    for (const key in src) {\r\n        if (hasOwn(src, key)) {\r\n            if (isNotObjectOrIsArray(src[key]) || isNotObjectOrIsArray(des[key])) {\r\n                // replace with src[key] when:\r\n                // src[key] or des[key] is not a object, or\r\n                // src[key] or des[key] is a array\r\n                des[key] = src[key];\r\n            }\r\n            else {\r\n                // src[key] and des[key] are both object, merge them\r\n                deepCopy(src[key], des[key]);\r\n            }\r\n        }\r\n    }\r\n}\r\n// for Intlify DevTools\r\nconst getMetaInfo = /* #__PURE__*/ () => {\r\n    const instance = getCurrentInstance();\r\n    return instance && instance.type[DEVTOOLS_META] // eslint-disable-line @typescript-eslint/no-explicit-any\r\n        ? { [DEVTOOLS_META]: instance.type[DEVTOOLS_META] } // eslint-disable-line @typescript-eslint/no-explicit-any\r\n        : null;\r\n};\r\n/**\r\n * Create composer interface factory\r\n *\r\n * @internal\r\n */\r\nfunction createComposer(options = {}) {\r\n    const { __root } = options;\r\n    const _isGlobal = __root === undefined;\r\n    let _inheritLocale = isBoolean(options.inheritLocale)\r\n        ? options.inheritLocale\r\n        : true;\r\n    const _locale = ref(\r\n    // prettier-ignore\r\n    __root && _inheritLocale\r\n        ? __root.locale.value\r\n        : isString(options.locale)\r\n            ? options.locale\r\n            : 'en-US');\r\n    const _fallbackLocale = ref(\r\n    // prettier-ignore\r\n    __root && _inheritLocale\r\n        ? __root.fallbackLocale.value\r\n        : isString(options.fallbackLocale) ||\r\n            isArray(options.fallbackLocale) ||\r\n            isPlainObject(options.fallbackLocale) ||\r\n            options.fallbackLocale === false\r\n            ? options.fallbackLocale\r\n            : _locale.value);\r\n    const _messages = ref(getLocaleMessages(_locale.value, options));\r\n    const _datetimeFormats = ref(isPlainObject(options.datetimeFormats)\r\n        ? options.datetimeFormats\r\n        : { [_locale.value]: {} });\r\n    const _numberFormats = ref(isPlainObject(options.numberFormats)\r\n        ? options.numberFormats\r\n        : { [_locale.value]: {} });\r\n    // warning suppress options\r\n    // prettier-ignore\r\n    let _missingWarn = __root\r\n        ? __root.missingWarn\r\n        : isBoolean(options.missingWarn) || isRegExp(options.missingWarn)\r\n            ? options.missingWarn\r\n            : true;\r\n    // prettier-ignore\r\n    let _fallbackWarn = __root\r\n        ? __root.fallbackWarn\r\n        : isBoolean(options.fallbackWarn) || isRegExp(options.fallbackWarn)\r\n            ? options.fallbackWarn\r\n            : true;\r\n    // prettier-ignore\r\n    let _fallbackRoot = __root\r\n        ? __root.fallbackRoot\r\n        : isBoolean(options.fallbackRoot)\r\n            ? options.fallbackRoot\r\n            : true;\r\n    // configure fall back to root\r\n    let _fallbackFormat = !!options.fallbackFormat;\r\n    // runtime missing\r\n    let _missing = isFunction(options.missing) ? options.missing : null;\r\n    let _runtimeMissing = isFunction(options.missing)\r\n        ? defineCoreMissingHandler(options.missing)\r\n        : null;\r\n    // postTranslation handler\r\n    let _postTranslation = isFunction(options.postTranslation)\r\n        ? options.postTranslation\r\n        : null;\r\n    let _warnHtmlMessage = isBoolean(options.warnHtmlMessage)\r\n        ? options.warnHtmlMessage\r\n        : true;\r\n    let _escapeParameter = !!options.escapeParameter;\r\n    // custom linked modifiers\r\n    // prettier-ignore\r\n    const _modifiers = __root\r\n        ? __root.modifiers\r\n        : isPlainObject(options.modifiers)\r\n            ? options.modifiers\r\n            : {};\r\n    // pluralRules\r\n    let _pluralRules = options.pluralRules || (__root && __root.pluralRules);\r\n    // runtime context\r\n    // eslint-disable-next-line prefer-const\r\n    let _context;\r\n    function getCoreContext() {\r\n        return createCoreContext({\r\n            version: VERSION,\r\n            locale: _locale.value,\r\n            fallbackLocale: _fallbackLocale.value,\r\n            messages: _messages.value,\r\n            datetimeFormats: _datetimeFormats.value,\r\n            numberFormats: _numberFormats.value,\r\n            modifiers: _modifiers,\r\n            pluralRules: _pluralRules,\r\n            missing: _runtimeMissing === null ? undefined : _runtimeMissing,\r\n            missingWarn: _missingWarn,\r\n            fallbackWarn: _fallbackWarn,\r\n            fallbackFormat: _fallbackFormat,\r\n            unresolving: true,\r\n            postTranslation: _postTranslation === null ? undefined : _postTranslation,\r\n            warnHtmlMessage: _warnHtmlMessage,\r\n            escapeParameter: _escapeParameter,\r\n            __datetimeFormatters: isPlainObject(_context)\r\n                ? _context.__datetimeFormatters\r\n                : undefined,\r\n            __numberFormatters: isPlainObject(_context)\r\n                ? _context.__numberFormatters\r\n                : undefined,\r\n            __v_emitter: isPlainObject(_context)\r\n                ? _context.__v_emitter\r\n                : undefined,\r\n            __meta: { framework: 'vue' }\r\n        });\r\n    }\r\n    _context = getCoreContext();\r\n    updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);\r\n    // track reactivity\r\n    function trackReactivityValues() {\r\n        return [\r\n            _locale.value,\r\n            _fallbackLocale.value,\r\n            _messages.value,\r\n            _datetimeFormats.value,\r\n            _numberFormats.value\r\n        ];\r\n    }\r\n    // locale\r\n    const locale = computed({\r\n        get: () => _locale.value,\r\n        set: val => {\r\n            _locale.value = val;\r\n            _context.locale = _locale.value;\r\n        }\r\n    });\r\n    // fallbackLocale\r\n    const fallbackLocale = computed({\r\n        get: () => _fallbackLocale.value,\r\n        set: val => {\r\n            _fallbackLocale.value = val;\r\n            _context.fallbackLocale = _fallbackLocale.value;\r\n            updateFallbackLocale(_context, _locale.value, val);\r\n        }\r\n    });\r\n    // messages\r\n    const messages = computed(() => _messages.value);\r\n    // datetimeFormats\r\n    const datetimeFormats = computed(() => _datetimeFormats.value);\r\n    // numberFormats\r\n    const numberFormats = computed(() => _numberFormats.value);\r\n    // getPostTranslationHandler\r\n    function getPostTranslationHandler() {\r\n        return isFunction(_postTranslation) ? _postTranslation : null;\r\n    }\r\n    // setPostTranslationHandler\r\n    function setPostTranslationHandler(handler) {\r\n        _postTranslation = handler;\r\n        _context.postTranslation = handler;\r\n    }\r\n    // getMissingHandler\r\n    function getMissingHandler() {\r\n        return _missing;\r\n    }\r\n    // setMissingHandler\r\n    function setMissingHandler(handler) {\r\n        if (handler !== null) {\r\n            _runtimeMissing = defineCoreMissingHandler(handler);\r\n        }\r\n        _missing = handler;\r\n        _context.missing = _runtimeMissing;\r\n    }\r\n    function isResolvedTranslateMessage(type, arg // eslint-disable-line @typescript-eslint/no-explicit-any\r\n    ) {\r\n        return type !== 'translate' || !!arg.resolvedMessage === false;\r\n    }\r\n    function wrapWithDeps(fn, argumentParser, warnType, fallbackSuccess, fallbackFail, successCondition) {\r\n        trackReactivityValues(); // track reactive dependency\r\n        // NOTE: experimental !!\r\n        let ret;\r\n        if ((process.env.NODE_ENV !== 'production') || __INTLIFY_PROD_DEVTOOLS__) {\r\n            try {\r\n                setAdditionalMeta(getMetaInfo());\r\n                ret = fn(_context);\r\n            }\r\n            finally {\r\n                setAdditionalMeta(null);\r\n            }\r\n        }\r\n        else {\r\n            ret = fn(_context);\r\n        }\r\n        if (isNumber(ret) && ret === NOT_REOSLVED) {\r\n            const [key, arg2] = argumentParser();\r\n            if ((process.env.NODE_ENV !== 'production') &&\r\n                __root &&\r\n                isString(key) &&\r\n                isResolvedTranslateMessage(warnType, arg2)) {\r\n                if (_fallbackRoot &&\r\n                    (isTranslateFallbackWarn(_fallbackWarn, key) ||\r\n                        isTranslateMissingWarn(_missingWarn, key))) {\r\n                    warn(getWarnMessage(6 /* FALLBACK_TO_ROOT */, {\r\n                        key,\r\n                        type: warnType\r\n                    }));\r\n                }\r\n                // for vue-devtools timeline event\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    const { __v_emitter: emitter } = _context;\r\n                    if (emitter && _fallbackRoot) {\r\n                        emitter.emit(\"fallback\" /* FALBACK */, {\r\n                            type: warnType,\r\n                            key,\r\n                            to: 'global',\r\n                            groupId: `${warnType}:${key}`\r\n                        });\r\n                    }\r\n                }\r\n            }\r\n            return __root && _fallbackRoot\r\n                ? fallbackSuccess(__root)\r\n                : fallbackFail(key);\r\n        }\r\n        else if (successCondition(ret)) {\r\n            return ret;\r\n        }\r\n        else {\r\n            /* istanbul ignore next */\r\n            throw createI18nError(14 /* UNEXPECTED_RETURN_TYPE */);\r\n        }\r\n    }\r\n    // t\r\n    function t(...args) {\r\n        return wrapWithDeps(context => translate(context, ...args), () => parseTranslateArgs(...args), 'translate', root => root.t(...args), key => key, val => isString(val));\r\n    }\r\n    // rt\r\n    function rt(...args) {\r\n        const [arg1, arg2, arg3] = args;\r\n        if (arg3 && !isObject(arg3)) {\r\n            throw createI18nError(15 /* INVALID_ARGUMENT */);\r\n        }\r\n        return t(...[arg1, arg2, assign({ resolvedMessage: true }, arg3 || {})]);\r\n    }\r\n    // d\r\n    function d(...args) {\r\n        return wrapWithDeps(context => datetime(context, ...args), () => parseDateTimeArgs(...args), 'datetime format', root => root.d(...args), () => MISSING_RESOLVE_VALUE, val => isString(val));\r\n    }\r\n    // n\r\n    function n(...args) {\r\n        return wrapWithDeps(context => number(context, ...args), () => parseNumberArgs(...args), 'number format', root => root.n(...args), () => MISSING_RESOLVE_VALUE, val => isString(val));\r\n    }\r\n    // for custom processor\r\n    function normalize(values) {\r\n        return values.map(val => isString(val) ? createVNode(Text, null, val, 0) : val);\r\n    }\r\n    const interpolate = (val) => val;\r\n    const processor = {\r\n        normalize,\r\n        interpolate,\r\n        type: 'vnode'\r\n    };\r\n    // transrateVNode, using for `i18n-t` component\r\n    function transrateVNode(...args) {\r\n        return wrapWithDeps(context => {\r\n            let ret;\r\n            const _context = context;\r\n            try {\r\n                _context.processor = processor;\r\n                ret = translate(_context, ...args);\r\n            }\r\n            finally {\r\n                _context.processor = null;\r\n            }\r\n            return ret;\r\n        }, () => parseTranslateArgs(...args), 'translate', \r\n        // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n        root => root[TransrateVNodeSymbol](...args), key => [createVNode(Text, null, key, 0)], val => isArray(val));\r\n    }\r\n    // numberParts, using for `i18n-n` component\r\n    function numberParts(...args) {\r\n        return wrapWithDeps(context => number(context, ...args), () => parseNumberArgs(...args), 'number format', \r\n        // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n        root => root[NumberPartsSymbol](...args), () => [], val => isString(val) || isArray(val));\r\n    }\r\n    // datetimeParts, using for `i18n-d` component\r\n    function datetimeParts(...args) {\r\n        return wrapWithDeps(context => datetime(context, ...args), () => parseDateTimeArgs(...args), 'datetime format', \r\n        // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n        root => root[DatetimePartsSymbol](...args), () => [], val => isString(val) || isArray(val));\r\n    }\r\n    function setPluralRules(rules) {\r\n        _pluralRules = rules;\r\n        _context.pluralRules = _pluralRules;\r\n    }\r\n    // te\r\n    function te(key, locale) {\r\n        const targetLocale = isString(locale) ? locale : _locale.value;\r\n        const message = getLocaleMessage(targetLocale);\r\n        return resolveValue(message, key) !== null;\r\n    }\r\n    function resolveMessages(key) {\r\n        let messages = null;\r\n        const locales = getLocaleChain(_context, _fallbackLocale.value, _locale.value);\r\n        for (let i = 0; i < locales.length; i++) {\r\n            const targetLocaleMessages = _messages.value[locales[i]] || {};\r\n            const messageValue = resolveValue(targetLocaleMessages, key);\r\n            if (messageValue != null) {\r\n                messages = messageValue;\r\n                break;\r\n            }\r\n        }\r\n        return messages;\r\n    }\r\n    // tm\r\n    function tm(key) {\r\n        const messages = resolveMessages(key);\r\n        // prettier-ignore\r\n        return messages != null\r\n            ? messages\r\n            : __root\r\n                ? __root.tm(key) || {}\r\n                : {};\r\n    }\r\n    // getLocaleMessage\r\n    function getLocaleMessage(locale) {\r\n        return (_messages.value[locale] || {});\r\n    }\r\n    // setLocaleMessage\r\n    function setLocaleMessage(locale, message) {\r\n        _messages.value[locale] = message;\r\n        _context.messages = _messages.value;\r\n    }\r\n    // mergeLocaleMessage\r\n    function mergeLocaleMessage(locale, message) {\r\n        _messages.value[locale] = _messages.value[locale] || {};\r\n        deepCopy(message, _messages.value[locale]);\r\n        _context.messages = _messages.value;\r\n    }\r\n    // getDateTimeFormat\r\n    function getDateTimeFormat(locale) {\r\n        return _datetimeFormats.value[locale] || {};\r\n    }\r\n    // setDateTimeFormat\r\n    function setDateTimeFormat(locale, format) {\r\n        _datetimeFormats.value[locale] = format;\r\n        _context.datetimeFormats = _datetimeFormats.value;\r\n        clearDateTimeFormat(_context, locale, format);\r\n    }\r\n    // mergeDateTimeFormat\r\n    function mergeDateTimeFormat(locale, format) {\r\n        _datetimeFormats.value[locale] = assign(_datetimeFormats.value[locale] || {}, format);\r\n        _context.datetimeFormats = _datetimeFormats.value;\r\n        clearDateTimeFormat(_context, locale, format);\r\n    }\r\n    // getNumberFormat\r\n    function getNumberFormat(locale) {\r\n        return _numberFormats.value[locale] || {};\r\n    }\r\n    // setNumberFormat\r\n    function setNumberFormat(locale, format) {\r\n        _numberFormats.value[locale] = format;\r\n        _context.numberFormats = _numberFormats.value;\r\n        clearNumberFormat(_context, locale, format);\r\n    }\r\n    // mergeNumberFormat\r\n    function mergeNumberFormat(locale, format) {\r\n        _numberFormats.value[locale] = assign(_numberFormats.value[locale] || {}, format);\r\n        _context.numberFormats = _numberFormats.value;\r\n        clearNumberFormat(_context, locale, format);\r\n    }\r\n    // for debug\r\n    composerID++;\r\n    // watch root locale & fallbackLocale\r\n    if (__root) {\r\n        watch(__root.locale, (val) => {\r\n            if (_inheritLocale) {\r\n                _locale.value = val;\r\n                _context.locale = val;\r\n                updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);\r\n            }\r\n        });\r\n        watch(__root.fallbackLocale, (val) => {\r\n            if (_inheritLocale) {\r\n                _fallbackLocale.value = val;\r\n                _context.fallbackLocale = val;\r\n                updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);\r\n            }\r\n        });\r\n    }\r\n    // define composition API!\r\n    const composer = {\r\n        id: composerID,\r\n        locale,\r\n        fallbackLocale,\r\n        get inheritLocale() {\r\n            return _inheritLocale;\r\n        },\r\n        set inheritLocale(val) {\r\n            _inheritLocale = val;\r\n            if (val && __root) {\r\n                _locale.value = __root.locale.value;\r\n                _fallbackLocale.value = __root.fallbackLocale.value;\r\n                updateFallbackLocale(_context, _locale.value, _fallbackLocale.value);\r\n            }\r\n        },\r\n        get availableLocales() {\r\n            return Object.keys(_messages.value).sort();\r\n        },\r\n        messages,\r\n        datetimeFormats,\r\n        numberFormats,\r\n        get modifiers() {\r\n            return _modifiers;\r\n        },\r\n        get pluralRules() {\r\n            return _pluralRules || {};\r\n        },\r\n        get isGlobal() {\r\n            return _isGlobal;\r\n        },\r\n        get missingWarn() {\r\n            return _missingWarn;\r\n        },\r\n        set missingWarn(val) {\r\n            _missingWarn = val;\r\n            _context.missingWarn = _missingWarn;\r\n        },\r\n        get fallbackWarn() {\r\n            return _fallbackWarn;\r\n        },\r\n        set fallbackWarn(val) {\r\n            _fallbackWarn = val;\r\n            _context.fallbackWarn = _fallbackWarn;\r\n        },\r\n        get fallbackRoot() {\r\n            return _fallbackRoot;\r\n        },\r\n        set fallbackRoot(val) {\r\n            _fallbackRoot = val;\r\n        },\r\n        get fallbackFormat() {\r\n            return _fallbackFormat;\r\n        },\r\n        set fallbackFormat(val) {\r\n            _fallbackFormat = val;\r\n            _context.fallbackFormat = _fallbackFormat;\r\n        },\r\n        get warnHtmlMessage() {\r\n            return _warnHtmlMessage;\r\n        },\r\n        set warnHtmlMessage(val) {\r\n            _warnHtmlMessage = val;\r\n            _context.warnHtmlMessage = val;\r\n        },\r\n        get escapeParameter() {\r\n            return _escapeParameter;\r\n        },\r\n        set escapeParameter(val) {\r\n            _escapeParameter = val;\r\n            _context.escapeParameter = val;\r\n        },\r\n        t,\r\n        rt,\r\n        d,\r\n        n,\r\n        te,\r\n        tm,\r\n        getLocaleMessage,\r\n        setLocaleMessage,\r\n        mergeLocaleMessage,\r\n        getDateTimeFormat,\r\n        setDateTimeFormat,\r\n        mergeDateTimeFormat,\r\n        getNumberFormat,\r\n        setNumberFormat,\r\n        mergeNumberFormat,\r\n        getPostTranslationHandler,\r\n        setPostTranslationHandler,\r\n        getMissingHandler,\r\n        setMissingHandler,\r\n        [TransrateVNodeSymbol]: transrateVNode,\r\n        [NumberPartsSymbol]: numberParts,\r\n        [DatetimePartsSymbol]: datetimeParts,\r\n        [SetPluralRulesSymbol]: setPluralRules\r\n    };\r\n    // for vue-devtools timeline event\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        composer[EnableEmitter] = (emitter) => {\r\n            _context.__v_emitter = emitter;\r\n        };\r\n        composer[DisableEmitter] = () => {\r\n            _context.__v_emitter = undefined;\r\n        };\r\n    }\r\n    return composer;\r\n}\n\n/**\r\n * Convert to I18n Composer Options from VueI18n Options\r\n *\r\n * @internal\r\n */\r\nfunction convertComposerOptions(options) {\r\n    const locale = isString(options.locale) ? options.locale : 'en-US';\r\n    const fallbackLocale = isString(options.fallbackLocale) ||\r\n        isArray(options.fallbackLocale) ||\r\n        isPlainObject(options.fallbackLocale) ||\r\n        options.fallbackLocale === false\r\n        ? options.fallbackLocale\r\n        : locale;\r\n    const missing = isFunction(options.missing) ? options.missing : undefined;\r\n    const missingWarn = isBoolean(options.silentTranslationWarn) ||\r\n        isRegExp(options.silentTranslationWarn)\r\n        ? !options.silentTranslationWarn\r\n        : true;\r\n    const fallbackWarn = isBoolean(options.silentFallbackWarn) ||\r\n        isRegExp(options.silentFallbackWarn)\r\n        ? !options.silentFallbackWarn\r\n        : true;\r\n    const fallbackRoot = isBoolean(options.fallbackRoot)\r\n        ? options.fallbackRoot\r\n        : true;\r\n    const fallbackFormat = !!options.formatFallbackMessages;\r\n    const modifiers = isPlainObject(options.modifiers) ? options.modifiers : {};\r\n    const pluralizationRules = options.pluralizationRules;\r\n    const postTranslation = isFunction(options.postTranslation)\r\n        ? options.postTranslation\r\n        : undefined;\r\n    const warnHtmlMessage = isString(options.warnHtmlInMessage)\r\n        ? options.warnHtmlInMessage !== 'off'\r\n        : true;\r\n    const escapeParameter = !!options.escapeParameterHtml;\r\n    const inheritLocale = isBoolean(options.sync) ? options.sync : true;\r\n    if ((process.env.NODE_ENV !== 'production') && options.formatter) {\r\n        warn(getWarnMessage(8 /* NOT_SUPPORTED_FORMATTER */));\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && options.preserveDirectiveContent) {\r\n        warn(getWarnMessage(9 /* NOT_SUPPORTED_PRESERVE_DIRECTIVE */));\r\n    }\r\n    let messages = options.messages;\r\n    if (isPlainObject(options.sharedMessages)) {\r\n        const sharedMessages = options.sharedMessages;\r\n        const locales = Object.keys(sharedMessages);\r\n        messages = locales.reduce((messages, locale) => {\r\n            const message = messages[locale] || (messages[locale] = {});\r\n            assign(message, sharedMessages[locale]);\r\n            return messages;\r\n        }, (messages || {}));\r\n    }\r\n    const { __i18n, __root } = options;\r\n    const datetimeFormats = options.datetimeFormats;\r\n    const numberFormats = options.numberFormats;\r\n    const flatJson = options.flatJson;\r\n    return {\r\n        locale,\r\n        fallbackLocale,\r\n        messages,\r\n        flatJson,\r\n        datetimeFormats,\r\n        numberFormats,\r\n        missing,\r\n        missingWarn,\r\n        fallbackWarn,\r\n        fallbackRoot,\r\n        fallbackFormat,\r\n        modifiers,\r\n        pluralRules: pluralizationRules,\r\n        postTranslation,\r\n        warnHtmlMessage,\r\n        escapeParameter,\r\n        inheritLocale,\r\n        __i18n,\r\n        __root\r\n    };\r\n}\r\n/**\r\n * create VueI18n interface factory\r\n *\r\n * @internal\r\n */\r\nfunction createVueI18n(options = {}) {\r\n    const composer = createComposer(convertComposerOptions(options));\r\n    // defines VueI18n\r\n    const vueI18n = {\r\n        // id\r\n        id: composer.id,\r\n        // locale\r\n        get locale() {\r\n            return composer.locale.value;\r\n        },\r\n        set locale(val) {\r\n            composer.locale.value = val;\r\n        },\r\n        // fallbackLocale\r\n        get fallbackLocale() {\r\n            return composer.fallbackLocale.value;\r\n        },\r\n        set fallbackLocale(val) {\r\n            composer.fallbackLocale.value = val;\r\n        },\r\n        // messages\r\n        get messages() {\r\n            return composer.messages.value;\r\n        },\r\n        // datetimeFormats\r\n        get datetimeFormats() {\r\n            return composer.datetimeFormats.value;\r\n        },\r\n        // numberFormats\r\n        get numberFormats() {\r\n            return composer.numberFormats.value;\r\n        },\r\n        // availableLocales\r\n        get availableLocales() {\r\n            return composer.availableLocales;\r\n        },\r\n        // formatter\r\n        get formatter() {\r\n            (process.env.NODE_ENV !== 'production') && warn(getWarnMessage(8 /* NOT_SUPPORTED_FORMATTER */));\r\n            // dummy\r\n            return {\r\n                interpolate() {\r\n                    return [];\r\n                }\r\n            };\r\n        },\r\n        set formatter(val) {\r\n            (process.env.NODE_ENV !== 'production') && warn(getWarnMessage(8 /* NOT_SUPPORTED_FORMATTER */));\r\n        },\r\n        // missing\r\n        get missing() {\r\n            return composer.getMissingHandler();\r\n        },\r\n        set missing(handler) {\r\n            composer.setMissingHandler(handler);\r\n        },\r\n        // silentTranslationWarn\r\n        get silentTranslationWarn() {\r\n            return isBoolean(composer.missingWarn)\r\n                ? !composer.missingWarn\r\n                : composer.missingWarn;\r\n        },\r\n        set silentTranslationWarn(val) {\r\n            composer.missingWarn = isBoolean(val) ? !val : val;\r\n        },\r\n        // silentFallbackWarn\r\n        get silentFallbackWarn() {\r\n            return isBoolean(composer.fallbackWarn)\r\n                ? !composer.fallbackWarn\r\n                : composer.fallbackWarn;\r\n        },\r\n        set silentFallbackWarn(val) {\r\n            composer.fallbackWarn = isBoolean(val) ? !val : val;\r\n        },\r\n        // modifiers\r\n        get modifiers() {\r\n            return composer.modifiers;\r\n        },\r\n        // formatFallbackMessages\r\n        get formatFallbackMessages() {\r\n            return composer.fallbackFormat;\r\n        },\r\n        set formatFallbackMessages(val) {\r\n            composer.fallbackFormat = val;\r\n        },\r\n        // postTranslation\r\n        get postTranslation() {\r\n            return composer.getPostTranslationHandler();\r\n        },\r\n        set postTranslation(handler) {\r\n            composer.setPostTranslationHandler(handler);\r\n        },\r\n        // sync\r\n        get sync() {\r\n            return composer.inheritLocale;\r\n        },\r\n        set sync(val) {\r\n            composer.inheritLocale = val;\r\n        },\r\n        // warnInHtmlMessage\r\n        get warnHtmlInMessage() {\r\n            return composer.warnHtmlMessage ? 'warn' : 'off';\r\n        },\r\n        set warnHtmlInMessage(val) {\r\n            composer.warnHtmlMessage = val !== 'off';\r\n        },\r\n        // escapeParameterHtml\r\n        get escapeParameterHtml() {\r\n            return composer.escapeParameter;\r\n        },\r\n        set escapeParameterHtml(val) {\r\n            composer.escapeParameter = val;\r\n        },\r\n        // preserveDirectiveContent\r\n        get preserveDirectiveContent() {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(getWarnMessage(9 /* NOT_SUPPORTED_PRESERVE_DIRECTIVE */));\r\n            return true;\r\n        },\r\n        set preserveDirectiveContent(val) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(getWarnMessage(9 /* NOT_SUPPORTED_PRESERVE_DIRECTIVE */));\r\n        },\r\n        // pluralizationRules\r\n        get pluralizationRules() {\r\n            return composer.pluralRules || {};\r\n        },\r\n        // for internal\r\n        __composer: composer,\r\n        // t\r\n        t(...args) {\r\n            const [arg1, arg2, arg3] = args;\r\n            const options = {};\r\n            let list = null;\r\n            let named = null;\r\n            if (!isString(arg1)) {\r\n                throw createI18nError(15 /* INVALID_ARGUMENT */);\r\n            }\r\n            const key = arg1;\r\n            if (isString(arg2)) {\r\n                options.locale = arg2;\r\n            }\r\n            else if (isArray(arg2)) {\r\n                list = arg2;\r\n            }\r\n            else if (isPlainObject(arg2)) {\r\n                named = arg2;\r\n            }\r\n            if (isArray(arg3)) {\r\n                list = arg3;\r\n            }\r\n            else if (isPlainObject(arg3)) {\r\n                named = arg3;\r\n            }\r\n            return composer.t(key, list || named || {}, options);\r\n        },\r\n        rt(...args) {\r\n            return composer.rt(...args);\r\n        },\r\n        // tc\r\n        tc(...args) {\r\n            const [arg1, arg2, arg3] = args;\r\n            const options = { plural: 1 };\r\n            let list = null;\r\n            let named = null;\r\n            if (!isString(arg1)) {\r\n                throw createI18nError(15 /* INVALID_ARGUMENT */);\r\n            }\r\n            const key = arg1;\r\n            if (isString(arg2)) {\r\n                options.locale = arg2;\r\n            }\r\n            else if (isNumber(arg2)) {\r\n                options.plural = arg2;\r\n            }\r\n            else if (isArray(arg2)) {\r\n                list = arg2;\r\n            }\r\n            else if (isPlainObject(arg2)) {\r\n                named = arg2;\r\n            }\r\n            if (isString(arg3)) {\r\n                options.locale = arg3;\r\n            }\r\n            else if (isArray(arg3)) {\r\n                list = arg3;\r\n            }\r\n            else if (isPlainObject(arg3)) {\r\n                named = arg3;\r\n            }\r\n            return composer.t(key, list || named || {}, options);\r\n        },\r\n        // te\r\n        te(key, locale) {\r\n            return composer.te(key, locale);\r\n        },\r\n        // tm\r\n        tm(key) {\r\n            return composer.tm(key);\r\n        },\r\n        // getLocaleMessage\r\n        getLocaleMessage(locale) {\r\n            return composer.getLocaleMessage(locale);\r\n        },\r\n        // setLocaleMessage\r\n        setLocaleMessage(locale, message) {\r\n            composer.setLocaleMessage(locale, message);\r\n        },\r\n        // mergeLocaleMessage\r\n        mergeLocaleMessage(locale, message) {\r\n            composer.mergeLocaleMessage(locale, message);\r\n        },\r\n        // d\r\n        d(...args) {\r\n            return composer.d(...args);\r\n        },\r\n        // getDateTimeFormat\r\n        getDateTimeFormat(locale) {\r\n            return composer.getDateTimeFormat(locale);\r\n        },\r\n        // setDateTimeFormat\r\n        setDateTimeFormat(locale, format) {\r\n            composer.setDateTimeFormat(locale, format);\r\n        },\r\n        // mergeDateTimeFormat\r\n        mergeDateTimeFormat(locale, format) {\r\n            composer.mergeDateTimeFormat(locale, format);\r\n        },\r\n        // n\r\n        n(...args) {\r\n            return composer.n(...args);\r\n        },\r\n        // getNumberFormat\r\n        getNumberFormat(locale) {\r\n            return composer.getNumberFormat(locale);\r\n        },\r\n        // setNumberFormat\r\n        setNumberFormat(locale, format) {\r\n            composer.setNumberFormat(locale, format);\r\n        },\r\n        // mergeNumberFormat\r\n        mergeNumberFormat(locale, format) {\r\n            composer.mergeNumberFormat(locale, format);\r\n        },\r\n        // getChoiceIndex\r\n        // eslint-disable-next-line @typescript-eslint/no-unused-vars\r\n        getChoiceIndex(choice, choicesLength) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(getWarnMessage(10 /* NOT_SUPPORTED_GET_CHOICE_INDEX */));\r\n            return -1;\r\n        },\r\n        // for internal\r\n        __onComponentInstanceCreated(target) {\r\n            const { componentInstanceCreatedListener } = options;\r\n            if (componentInstanceCreatedListener) {\r\n                componentInstanceCreatedListener(target, vueI18n);\r\n            }\r\n        }\r\n    };\r\n    // for vue-devtools timeline event\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        vueI18n.__enableEmitter = (emitter) => {\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            const __composer = composer;\r\n            __composer[EnableEmitter] && __composer[EnableEmitter](emitter);\r\n        };\r\n        vueI18n.__disableEmitter = () => {\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            const __composer = composer;\r\n            __composer[DisableEmitter] && __composer[DisableEmitter]();\r\n        };\r\n    }\r\n    return vueI18n;\r\n}\n\nconst baseFormatProps = {\r\n    tag: {\r\n        type: [String, Object]\r\n    },\r\n    locale: {\r\n        type: String\r\n    },\r\n    scope: {\r\n        type: String,\r\n        validator: (val) => val === 'parent' || val === 'global',\r\n        default: 'parent'\r\n    },\r\n    i18n: {\r\n        type: Object\r\n    }\r\n};\n\n/**\r\n * Translation Component\r\n *\r\n * @remarks\r\n * See the following items for property about details\r\n *\r\n * @VueI18nSee [TranslationProps](component#translationprops)\r\n * @VueI18nSee [BaseFormatProps](component#baseformatprops)\r\n * @VueI18nSee [Component Interpolation](../guide/advanced/component)\r\n *\r\n * @example\r\n * ```html\r\n * <div id=\"app\">\r\n *   <!-- ... -->\r\n *   <i18n path=\"term\" tag=\"label\" for=\"tos\">\r\n *     <a :href=\"url\" target=\"_blank\">{{ $t('tos') }}</a>\r\n *   </i18n>\r\n *   <!-- ... -->\r\n * </div>\r\n * ```\r\n * ```js\r\n * import { createApp } from 'vue'\r\n * import { createI18n } from 'vue-i18n'\r\n *\r\n * const messages = {\r\n *   en: {\r\n *     tos: 'Term of Service',\r\n *     term: 'I accept xxx {0}.'\r\n *   },\r\n *   ja: {\r\n *     tos: '利用規約',\r\n *     term: '私は xxx の{0}に同意します。'\r\n *   }\r\n * }\r\n *\r\n * const i18n = createI18n({\r\n *   locale: 'en',\r\n *   messages\r\n * })\r\n *\r\n * const app = createApp({\r\n *   data: {\r\n *     url: '/term'\r\n *   }\r\n * }).use(i18n).mount('#app')\r\n * ```\r\n *\r\n * @VueI18nComponent\r\n */\r\nconst Translation = {\r\n    /* eslint-disable */\r\n    name: 'i18n-t',\r\n    props: assign({\r\n        keypath: {\r\n            type: String,\r\n            required: true\r\n        },\r\n        plural: {\r\n            type: [Number, String],\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            validator: (val) => isNumber(val) || !isNaN(val)\r\n        }\r\n    }, baseFormatProps),\r\n    /* eslint-enable */\r\n    setup(props, context) {\r\n        const { slots, attrs } = context;\r\n        const i18n = props.i18n ||\r\n            useI18n({ useScope: props.scope });\r\n        const keys = Object.keys(slots).filter(key => key !== '_');\r\n        return () => {\r\n            const options = {};\r\n            if (props.locale) {\r\n                options.locale = props.locale;\r\n            }\r\n            if (props.plural !== undefined) {\r\n                options.plural = isString(props.plural) ? +props.plural : props.plural;\r\n            }\r\n            const arg = getInterpolateArg(context, keys);\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            const children = i18n[TransrateVNodeSymbol](props.keypath, arg, options);\r\n            const assignedAttrs = assign({}, attrs);\r\n            // prettier-ignore\r\n            return isString(props.tag)\r\n                ? h(props.tag, assignedAttrs, children)\r\n                : isObject(props.tag)\r\n                    ? h(props.tag, assignedAttrs, children)\r\n                    : h(Fragment, assignedAttrs, children);\r\n        };\r\n    }\r\n};\r\nfunction getInterpolateArg({ slots }, keys) {\r\n    if (keys.length === 1 && keys[0] === 'default') {\r\n        // default slot only\r\n        return slots.default ? slots.default() : [];\r\n    }\r\n    else {\r\n        // named slots\r\n        return keys.reduce((arg, key) => {\r\n            const slot = slots[key];\r\n            if (slot) {\r\n                arg[key] = slot();\r\n            }\r\n            return arg;\r\n        }, {});\r\n    }\r\n}\n\nfunction renderFormatter(props, context, slotKeys, partFormatter) {\r\n    const { slots, attrs } = context;\r\n    return () => {\r\n        const options = { part: true };\r\n        let overrides = {};\r\n        if (props.locale) {\r\n            options.locale = props.locale;\r\n        }\r\n        if (isString(props.format)) {\r\n            options.key = props.format;\r\n        }\r\n        else if (isObject(props.format)) {\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            if (isString(props.format.key)) {\r\n                // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n                options.key = props.format.key;\r\n            }\r\n            // Filter out number format options only\r\n            overrides = Object.keys(props.format).reduce((options, prop) => {\r\n                return slotKeys.includes(prop)\r\n                    ? assign({}, options, { [prop]: props.format[prop] }) // eslint-disable-line @typescript-eslint/no-explicit-any\r\n                    : options;\r\n            }, {});\r\n        }\r\n        const parts = partFormatter(...[props.value, options, overrides]);\r\n        let children = [options.key];\r\n        if (isArray(parts)) {\r\n            children = parts.map((part, index) => {\r\n                const slot = slots[part.type];\r\n                return slot\r\n                    ? slot({ [part.type]: part.value, index, parts })\r\n                    : [part.value];\r\n            });\r\n        }\r\n        else if (isString(parts)) {\r\n            children = [parts];\r\n        }\r\n        const assignedAttrs = assign({}, attrs);\r\n        // prettier-ignore\r\n        return isString(props.tag)\r\n            ? h(props.tag, assignedAttrs, children)\r\n            : isObject(props.tag)\r\n                ? h(props.tag, assignedAttrs, children)\r\n                : h(Fragment, assignedAttrs, children);\r\n    };\r\n}\n\nconst NUMBER_FORMAT_KEYS = [\r\n    'localeMatcher',\r\n    'style',\r\n    'unit',\r\n    'unitDisplay',\r\n    'currency',\r\n    'currencyDisplay',\r\n    'useGrouping',\r\n    'numberingSystem',\r\n    'minimumIntegerDigits',\r\n    'minimumFractionDigits',\r\n    'maximumFractionDigits',\r\n    'minimumSignificantDigits',\r\n    'maximumSignificantDigits',\r\n    'notation',\r\n    'formatMatcher'\r\n];\r\n/**\r\n * Number Format Component\r\n *\r\n * @remarks\r\n * See the following items for property about details\r\n *\r\n * @VueI18nSee [FormattableProps](component#formattableprops)\r\n * @VueI18nSee [BaseFormatProps](component#baseformatprops)\r\n * @VueI18nSee [Custom Formatting](../guide/essentials/number#custom-formatting)\r\n *\r\n * @VueI18nDanger\r\n * Not supported IE, due to no support `Intl.NumberFormat#formatToParts` in [IE](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/NumberFormat/formatToParts)\r\n *\r\n * If you want to use it, you need to use [polyfill](https://github.com/formatjs/formatjs/tree/main/packages/intl-numberformat)\r\n *\r\n * @VueI18nComponent\r\n */\r\nconst NumberFormat = {\r\n    /* eslint-disable */\r\n    name: 'i18n-n',\r\n    props: assign({\r\n        value: {\r\n            type: Number,\r\n            required: true\r\n        },\r\n        format: {\r\n            type: [String, Object]\r\n        }\r\n    }, baseFormatProps),\r\n    /* eslint-enable */\r\n    setup(props, context) {\r\n        const i18n = props.i18n ||\r\n            useI18n({ useScope: 'parent' });\r\n        return renderFormatter(props, context, NUMBER_FORMAT_KEYS, (...args) => \r\n        // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n        i18n[NumberPartsSymbol](...args));\r\n    }\r\n};\n\nconst DATETIME_FORMAT_KEYS = [\r\n    'dateStyle',\r\n    'timeStyle',\r\n    'fractionalSecondDigits',\r\n    'calendar',\r\n    'dayPeriod',\r\n    'numberingSystem',\r\n    'localeMatcher',\r\n    'timeZone',\r\n    'hour12',\r\n    'hourCycle',\r\n    'formatMatcher',\r\n    'weekday',\r\n    'era',\r\n    'year',\r\n    'month',\r\n    'day',\r\n    'hour',\r\n    'minute',\r\n    'second',\r\n    'timeZoneName'\r\n];\r\n/**\r\n * Datetime Format Component\r\n *\r\n * @remarks\r\n * See the following items for property about details\r\n *\r\n * @VueI18nSee [FormattableProps](component#formattableprops)\r\n * @VueI18nSee [BaseFormatProps](component#baseformatprops)\r\n * @VueI18nSee [Custom Formatting](../guide/essentials/datetime#custom-formatting)\r\n *\r\n * @VueI18nDanger\r\n * Not supported IE, due to no support `Intl.DateTimeFormat#formatToParts` in [IE](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/DateTimeFormat/formatToParts)\r\n *\r\n * If you want to use it, you need to use [polyfill](https://github.com/formatjs/formatjs/tree/main/packages/intl-datetimeformat)\r\n *\r\n * @VueI18nComponent\r\n */\r\nconst DatetimeFormat = {\r\n    /* eslint-disable */\r\n    name: 'i18n-d',\r\n    props: assign({\r\n        value: {\r\n            type: [Number, Date],\r\n            required: true\r\n        },\r\n        format: {\r\n            type: [String, Object]\r\n        }\r\n    }, baseFormatProps),\r\n    /* eslint-enable */\r\n    setup(props, context) {\r\n        const i18n = props.i18n ||\r\n            useI18n({ useScope: 'parent' });\r\n        return renderFormatter(props, context, DATETIME_FORMAT_KEYS, (...args) => \r\n        // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n        i18n[DatetimePartsSymbol](...args));\r\n    }\r\n};\n\nfunction getComposer$2(i18n, instance) {\r\n    const i18nInternal = i18n;\r\n    if (i18n.mode === 'composition') {\r\n        return (i18nInternal.__getInstance(instance) || i18n.global);\r\n    }\r\n    else {\r\n        const vueI18n = i18nInternal.__getInstance(instance);\r\n        return vueI18n != null\r\n            ? vueI18n.__composer\r\n            : i18n.global.__composer;\r\n    }\r\n}\r\nfunction vTDirective(i18n) {\r\n    const bind = (el, { instance, value, modifiers }) => {\r\n        /* istanbul ignore if */\r\n        if (!instance || !instance.$) {\r\n            throw createI18nError(22 /* UNEXPECTED_ERROR */);\r\n        }\r\n        const composer = getComposer$2(i18n, instance.$);\r\n        if ((process.env.NODE_ENV !== 'production') && modifiers.preserve) {\r\n            warn(getWarnMessage(7 /* NOT_SUPPORTED_PRESERVE */));\r\n        }\r\n        const parsedValue = parseValue(value);\r\n        el.textContent = composer.t(...makeParams(parsedValue));\r\n    };\r\n    return {\r\n        beforeMount: bind,\r\n        beforeUpdate: bind\r\n    };\r\n}\r\nfunction parseValue(value) {\r\n    if (isString(value)) {\r\n        return { path: value };\r\n    }\r\n    else if (isPlainObject(value)) {\r\n        if (!('path' in value)) {\r\n            throw createI18nError(19 /* REQUIRED_VALUE */, 'path');\r\n        }\r\n        return value;\r\n    }\r\n    else {\r\n        throw createI18nError(20 /* INVALID_VALUE */);\r\n    }\r\n}\r\nfunction makeParams(value) {\r\n    const { path, locale, args, choice, plural } = value;\r\n    const options = {};\r\n    const named = args || {};\r\n    if (isString(locale)) {\r\n        options.locale = locale;\r\n    }\r\n    if (isNumber(choice)) {\r\n        options.plural = choice;\r\n    }\r\n    if (isNumber(plural)) {\r\n        options.plural = plural;\r\n    }\r\n    return [path, named, options];\r\n}\n\nfunction apply(app, i18n, ...options) {\r\n    const pluginOptions = isPlainObject(options[0])\r\n        ? options[0]\r\n        : {};\r\n    const useI18nComponentName = !!pluginOptions.useI18nComponentName;\r\n    const globalInstall = isBoolean(pluginOptions.globalInstall)\r\n        ? pluginOptions.globalInstall\r\n        : true;\r\n    if ((process.env.NODE_ENV !== 'production') && globalInstall && useI18nComponentName) {\r\n        warn(getWarnMessage(11 /* COMPONENT_NAME_LEGACY_COMPATIBLE */, {\r\n            name: Translation.name\r\n        }));\r\n    }\r\n    if (globalInstall) {\r\n        // install components\r\n        app.component(!useI18nComponentName ? Translation.name : 'i18n', Translation);\r\n        app.component(NumberFormat.name, NumberFormat);\r\n        app.component(DatetimeFormat.name, DatetimeFormat);\r\n    }\r\n    // install directive\r\n    app.directive('t', vTDirective(i18n));\r\n}\n\nconst VUE_I18N_COMPONENT_TYPES = 'vue-i18n: composer properties';\r\nlet devtoolsApi;\r\nasync function enableDevTools(app, i18n) {\r\n    return new Promise((resolve, reject) => {\r\n        try {\r\n            setupDevtoolsPlugin({\r\n                id: \"vue-devtools-plugin-vue-i18n\" /* PLUGIN */,\r\n                label: VueDevToolsLabels[\"vue-devtools-plugin-vue-i18n\" /* PLUGIN */],\r\n                packageName: 'vue-i18n',\r\n                homepage: 'https://vue-i18n.intlify.dev',\r\n                logo: 'https://vue-i18n.intlify.dev/vue-i18n-devtools-logo.png',\r\n                componentStateTypes: [VUE_I18N_COMPONENT_TYPES],\r\n                app\r\n            }, api => {\r\n                devtoolsApi = api;\r\n                api.on.visitComponentTree(({ componentInstance, treeNode }) => {\r\n                    updateComponentTreeTags(componentInstance, treeNode, i18n);\r\n                });\r\n                api.on.inspectComponent(({ componentInstance, instanceData }) => {\r\n                    if (componentInstance.vnode.el.__VUE_I18N__ && instanceData) {\r\n                        if (i18n.mode === 'legacy') {\r\n                            // ignore global scope on legacy mode\r\n                            if (componentInstance.vnode.el.__VUE_I18N__ !==\r\n                                i18n.global.__composer) {\r\n                                inspectComposer(instanceData, componentInstance.vnode.el.__VUE_I18N__);\r\n                            }\r\n                        }\r\n                        else {\r\n                            inspectComposer(instanceData, componentInstance.vnode.el.__VUE_I18N__);\r\n                        }\r\n                    }\r\n                });\r\n                api.addInspector({\r\n                    id: \"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */,\r\n                    label: VueDevToolsLabels[\"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */],\r\n                    icon: 'language',\r\n                    treeFilterPlaceholder: VueDevToolsPlaceholders[\"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */]\r\n                });\r\n                api.on.getInspectorTree(payload => {\r\n                    if (payload.app === app &&\r\n                        payload.inspectorId === \"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */) {\r\n                        registerScope(payload, i18n);\r\n                    }\r\n                });\r\n                api.on.getInspectorState(payload => {\r\n                    if (payload.app === app &&\r\n                        payload.inspectorId === \"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */) {\r\n                        inspectScope(payload, i18n);\r\n                    }\r\n                });\r\n                api.on.editInspectorState(payload => {\r\n                    if (payload.app === app &&\r\n                        payload.inspectorId === \"vue-i18n-resource-inspector\" /* CUSTOM_INSPECTOR */) {\r\n                        editScope(payload, i18n);\r\n                    }\r\n                });\r\n                api.addTimelineLayer({\r\n                    id: \"vue-i18n-timeline\" /* TIMELINE */,\r\n                    label: VueDevToolsLabels[\"vue-i18n-timeline\" /* TIMELINE */],\r\n                    color: VueDevToolsTimelineColors[\"vue-i18n-timeline\" /* TIMELINE */]\r\n                });\r\n                resolve(true);\r\n            });\r\n        }\r\n        catch (e) {\r\n            console.error(e);\r\n            reject(false);\r\n        }\r\n    });\r\n}\r\nfunction updateComponentTreeTags(instance, // eslint-disable-line @typescript-eslint/no-explicit-any\r\ntreeNode, i18n) {\r\n    // prettier-ignore\r\n    const global = i18n.mode === 'composition'\r\n        ? i18n.global\r\n        : i18n.global.__composer;\r\n    if (instance && instance.vnode.el.__VUE_I18N__) {\r\n        // add custom tags local scope only\r\n        if (instance.vnode.el.__VUE_I18N__ !== global) {\r\n            const label = instance.type.name || instance.type.displayName || instance.type.__file;\r\n            const tag = {\r\n                label: `i18n (${label} Scope)`,\r\n                textColor: 0x000000,\r\n                backgroundColor: 0xffcd19\r\n            };\r\n            treeNode.tags.push(tag);\r\n        }\r\n    }\r\n}\r\nfunction inspectComposer(instanceData, composer) {\r\n    const type = VUE_I18N_COMPONENT_TYPES;\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'locale',\r\n        editable: true,\r\n        value: composer.locale.value\r\n    });\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'availableLocales',\r\n        editable: false,\r\n        value: composer.availableLocales\r\n    });\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'fallbackLocale',\r\n        editable: true,\r\n        value: composer.fallbackLocale.value\r\n    });\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'inheritLocale',\r\n        editable: true,\r\n        value: composer.inheritLocale\r\n    });\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'messages',\r\n        editable: false,\r\n        value: getLocaleMessageValue(composer.messages.value)\r\n    });\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'datetimeFormats',\r\n        editable: false,\r\n        value: composer.datetimeFormats.value\r\n    });\r\n    instanceData.state.push({\r\n        type,\r\n        key: 'numberFormats',\r\n        editable: false,\r\n        value: composer.numberFormats.value\r\n    });\r\n}\r\n// eslint-disable-next-line @typescript-eslint/no-explicit-any\r\nfunction getLocaleMessageValue(messages) {\r\n    const value = {};\r\n    Object.keys(messages).forEach((key) => {\r\n        const v = messages[key];\r\n        if (isFunction(v) && 'source' in v) {\r\n            value[key] = getMessageFunctionDetails(v);\r\n        }\r\n        else if (isObject(v)) {\r\n            value[key] = getLocaleMessageValue(v);\r\n        }\r\n        else {\r\n            value[key] = v;\r\n        }\r\n    });\r\n    return value;\r\n}\r\nconst ESC = {\r\n    '<': '&lt;',\r\n    '>': '&gt;',\r\n    '\"': '&quot;',\r\n    '&': '&amp;'\r\n};\r\nfunction escape(s) {\r\n    return s.replace(/[<>\"&]/g, escapeChar);\r\n}\r\nfunction escapeChar(a) {\r\n    return ESC[a] || a;\r\n}\r\n// eslint-disable-next-line @typescript-eslint/no-explicit-any\r\nfunction getMessageFunctionDetails(func) {\r\n    const argString = func.source ? `(\"${escape(func.source)}\")` : `(?)`;\r\n    return {\r\n        _custom: {\r\n            type: 'function',\r\n            display: `<span>ƒ</span> ${argString}`\r\n        }\r\n    };\r\n}\r\nfunction registerScope(payload, i18n) {\r\n    payload.rootNodes.push({\r\n        id: 'global',\r\n        label: 'Global Scope'\r\n    });\r\n    // prettier-ignore\r\n    const global = i18n.mode === 'composition'\r\n        ? i18n.global\r\n        : i18n.global.__composer;\r\n    for (const [keyInstance, instance] of i18n.__instances) {\r\n        // prettier-ignore\r\n        const composer = i18n.mode === 'composition'\r\n            ? instance\r\n            : instance.__composer;\r\n        if (global === composer) {\r\n            continue;\r\n        }\r\n        const label = keyInstance.type.name ||\r\n            keyInstance.type.displayName ||\r\n            keyInstance.type.__file;\r\n        payload.rootNodes.push({\r\n            id: composer.id.toString(),\r\n            label: `${label} Scope`\r\n        });\r\n    }\r\n}\r\nfunction getComposer$1(nodeId, i18n) {\r\n    if (nodeId === 'global') {\r\n        return i18n.mode === 'composition'\r\n            ? i18n.global\r\n            : i18n.global.__composer;\r\n    }\r\n    else {\r\n        const instance = Array.from(i18n.__instances.values()).find(item => item.id.toString() === nodeId);\r\n        if (instance) {\r\n            return i18n.mode === 'composition'\r\n                ? instance\r\n                : instance.__composer;\r\n        }\r\n        else {\r\n            return null;\r\n        }\r\n    }\r\n}\r\nfunction inspectScope(payload, i18n) {\r\n    const composer = getComposer$1(payload.nodeId, i18n);\r\n    if (composer) {\r\n        payload.state = makeScopeInspectState(composer);\r\n    }\r\n}\r\nfunction makeScopeInspectState(composer) {\r\n    const state = {};\r\n    const localeType = 'Locale related info';\r\n    const localeStates = [\r\n        {\r\n            type: localeType,\r\n            key: 'locale',\r\n            editable: true,\r\n            value: composer.locale.value\r\n        },\r\n        {\r\n            type: localeType,\r\n            key: 'fallbackLocale',\r\n            editable: true,\r\n            value: composer.fallbackLocale.value\r\n        },\r\n        {\r\n            type: localeType,\r\n            key: 'availableLocales',\r\n            editable: false,\r\n            value: composer.availableLocales\r\n        },\r\n        {\r\n            type: localeType,\r\n            key: 'inheritLocale',\r\n            editable: true,\r\n            value: composer.inheritLocale\r\n        }\r\n    ];\r\n    state[localeType] = localeStates;\r\n    const localeMessagesType = 'Locale messages info';\r\n    const localeMessagesStates = [\r\n        {\r\n            type: localeMessagesType,\r\n            key: 'messages',\r\n            editable: false,\r\n            value: getLocaleMessageValue(composer.messages.value)\r\n        }\r\n    ];\r\n    state[localeMessagesType] = localeMessagesStates;\r\n    const datetimeFormatsType = 'Datetime formats info';\r\n    const datetimeFormatsStates = [\r\n        {\r\n            type: datetimeFormatsType,\r\n            key: 'datetimeFormats',\r\n            editable: false,\r\n            value: composer.datetimeFormats.value\r\n        }\r\n    ];\r\n    state[datetimeFormatsType] = datetimeFormatsStates;\r\n    const numberFormatsType = 'Datetime formats info';\r\n    const numberFormatsStates = [\r\n        {\r\n            type: numberFormatsType,\r\n            key: 'numberFormats',\r\n            editable: false,\r\n            value: composer.numberFormats.value\r\n        }\r\n    ];\r\n    state[numberFormatsType] = numberFormatsStates;\r\n    return state;\r\n}\r\nfunction addTimelineEvent(event, payload) {\r\n    if (devtoolsApi) {\r\n        let groupId;\r\n        if (payload && 'groupId' in payload) {\r\n            groupId = payload.groupId;\r\n            delete payload.groupId;\r\n        }\r\n        devtoolsApi.addTimelineEvent({\r\n            layerId: \"vue-i18n-timeline\" /* TIMELINE */,\r\n            event: {\r\n                title: event,\r\n                groupId,\r\n                time: Date.now(),\r\n                meta: {},\r\n                data: payload || {},\r\n                logType: event === \"compile-error\" /* COMPILE_ERROR */\r\n                    ? 'error'\r\n                    : event === \"fallback\" /* FALBACK */ ||\r\n                        event === \"missing\" /* MISSING */\r\n                        ? 'warning'\r\n                        : 'default'\r\n            }\r\n        });\r\n    }\r\n}\r\nfunction editScope(payload, i18n) {\r\n    const composer = getComposer$1(payload.nodeId, i18n);\r\n    if (composer) {\r\n        const [field] = payload.path;\r\n        if (field === 'locale' && isString(payload.state.value)) {\r\n            composer.locale.value = payload.state.value;\r\n        }\r\n        else if (field === 'fallbackLocale' &&\r\n            (isString(payload.state.value) ||\r\n                isArray(payload.state.value) ||\r\n                isObject(payload.state.value))) {\r\n            composer.fallbackLocale.value = payload.state.value;\r\n        }\r\n        else if (field === 'inheritLocale' && isBoolean(payload.state.value)) {\r\n            composer.inheritLocale = payload.state.value;\r\n        }\r\n    }\r\n}\n\n// supports compatibility for legacy vue-i18n APIs\r\nfunction defineMixin(vuei18n, composer, i18n) {\r\n    return {\r\n        beforeCreate() {\r\n            const instance = getCurrentInstance();\r\n            /* istanbul ignore if */\r\n            if (!instance) {\r\n                throw createI18nError(22 /* UNEXPECTED_ERROR */);\r\n            }\r\n            const options = this.$options;\r\n            if (options.i18n) {\r\n                const optionsI18n = options.i18n;\r\n                if (options.__i18n) {\r\n                    optionsI18n.__i18n = options.__i18n;\r\n                }\r\n                optionsI18n.__root = composer;\r\n                if (this === this.$root) {\r\n                    this.$i18n = mergeToRoot(vuei18n, optionsI18n);\r\n                }\r\n                else {\r\n                    this.$i18n = createVueI18n(optionsI18n);\r\n                }\r\n            }\r\n            else if (options.__i18n) {\r\n                if (this === this.$root) {\r\n                    this.$i18n = mergeToRoot(vuei18n, options);\r\n                }\r\n                else {\r\n                    this.$i18n = createVueI18n({\r\n                        __i18n: options.__i18n,\r\n                        __root: composer\r\n                    });\r\n                }\r\n            }\r\n            else {\r\n                // set global\r\n                this.$i18n = vuei18n;\r\n            }\r\n            vuei18n.__onComponentInstanceCreated(this.$i18n);\r\n            i18n.__setInstance(instance, this.$i18n);\r\n            // defines vue-i18n legacy APIs\r\n            this.$t = (...args) => this.$i18n.t(...args);\r\n            this.$rt = (...args) => this.$i18n.rt(...args);\r\n            this.$tc = (...args) => this.$i18n.tc(...args);\r\n            this.$te = (key, locale) => this.$i18n.te(key, locale);\r\n            this.$d = (...args) => this.$i18n.d(...args);\r\n            this.$n = (...args) => this.$i18n.n(...args);\r\n            this.$tm = (key) => this.$i18n.tm(key);\r\n        },\r\n        mounted() {\r\n            /* istanbul ignore if */\r\n            if (((process.env.NODE_ENV !== 'production') || __VUE_I18N_PROD_DEVTOOLS__) && !false) {\r\n                this.$el.__VUE_I18N__ = this.$i18n.__composer;\r\n                const emitter = (this.__v_emitter = createEmitter());\r\n                const _vueI18n = this.$i18n;\r\n                _vueI18n.__enableEmitter && _vueI18n.__enableEmitter(emitter);\r\n                emitter.on('*', addTimelineEvent);\r\n            }\r\n        },\r\n        beforeUnmount() {\r\n            const instance = getCurrentInstance();\r\n            /* istanbul ignore if */\r\n            if (!instance) {\r\n                throw createI18nError(22 /* UNEXPECTED_ERROR */);\r\n            }\r\n            /* istanbul ignore if */\r\n            if (((process.env.NODE_ENV !== 'production') || __VUE_I18N_PROD_DEVTOOLS__) && !false) {\r\n                if (this.__v_emitter) {\r\n                    this.__v_emitter.off('*', addTimelineEvent);\r\n                    delete this.__v_emitter;\r\n                }\r\n                const _vueI18n = this.$i18n;\r\n                _vueI18n.__disableEmitter && _vueI18n.__disableEmitter();\r\n                delete this.$el.__VUE_I18N__;\r\n            }\r\n            delete this.$t;\r\n            delete this.$rt;\r\n            delete this.$tc;\r\n            delete this.$te;\r\n            delete this.$d;\r\n            delete this.$n;\r\n            delete this.$tm;\r\n            i18n.__deleteInstance(instance);\r\n            delete this.$i18n;\r\n        }\r\n    };\r\n}\r\nfunction mergeToRoot(root, options) {\r\n    root.locale = options.locale || root.locale;\r\n    root.fallbackLocale = options.fallbackLocale || root.fallbackLocale;\r\n    root.missing = options.missing || root.missing;\r\n    root.silentTranslationWarn =\r\n        options.silentTranslationWarn || root.silentFallbackWarn;\r\n    root.silentFallbackWarn =\r\n        options.silentFallbackWarn || root.silentFallbackWarn;\r\n    root.formatFallbackMessages =\r\n        options.formatFallbackMessages || root.formatFallbackMessages;\r\n    root.postTranslation = options.postTranslation || root.postTranslation;\r\n    root.warnHtmlInMessage = options.warnHtmlInMessage || root.warnHtmlInMessage;\r\n    root.escapeParameterHtml =\r\n        options.escapeParameterHtml || root.escapeParameterHtml;\r\n    root.sync = options.sync || root.sync;\r\n    root.__composer[SetPluralRulesSymbol](options.pluralizationRules || root.pluralizationRules);\r\n    const messages = getLocaleMessages(root.locale, {\r\n        messages: options.messages,\r\n        __i18n: options.__i18n\r\n    });\r\n    Object.keys(messages).forEach(locale => root.mergeLocaleMessage(locale, messages[locale]));\r\n    if (options.datetimeFormats) {\r\n        Object.keys(options.datetimeFormats).forEach(locale => root.mergeDateTimeFormat(locale, options.datetimeFormats[locale]));\r\n    }\r\n    if (options.numberFormats) {\r\n        Object.keys(options.numberFormats).forEach(locale => root.mergeNumberFormat(locale, options.numberFormats[locale]));\r\n    }\r\n    return root;\r\n}\n\n/**\r\n * Vue I18n factory\r\n *\r\n * @param options - An options, see the {@link I18nOptions}\r\n *\r\n * @returns {@link I18n} instance\r\n *\r\n * @remarks\r\n * If you use Legacy API mode, you need toto specify {@link VueI18nOptions} and `legacy: true` option.\r\n *\r\n * If you use composition API mode, you need to specify {@link ComposerOptions}.\r\n *\r\n * @VueI18nSee [Getting Started](../guide/)\r\n * @VueI18nSee [Composition API](../guide/advanced/composition)\r\n *\r\n * @example\r\n * case: for Legacy API\r\n * ```js\r\n * import { createApp } from 'vue'\r\n * import { createI18n } from 'vue-i18n'\r\n *\r\n * // call with I18n option\r\n * const i18n = createI18n({\r\n *   locale: 'ja',\r\n *   messages: {\r\n *     en: { ... },\r\n *     ja: { ... }\r\n *   }\r\n * })\r\n *\r\n * const App = {\r\n *   // ...\r\n * }\r\n *\r\n * const app = createApp(App)\r\n *\r\n * // install!\r\n * app.use(i18n)\r\n * app.mount('#app')\r\n * ```\r\n *\r\n * @example\r\n * case: for composition API\r\n * ```js\r\n * import { createApp } from 'vue'\r\n * import { createI18n, useI18n } from 'vue-i18n'\r\n *\r\n * // call with I18n option\r\n * const i18n = createI18n({\r\n *   legacy: false, // you must specify 'legacy: false' option\r\n *   locale: 'ja',\r\n *   messages: {\r\n *     en: { ... },\r\n *     ja: { ... }\r\n *   }\r\n * })\r\n *\r\n * const App = {\r\n *   setup() {\r\n *     // ...\r\n *     const { t } = useI18n({ ... })\r\n *     return { ... , t }\r\n *   }\r\n * }\r\n *\r\n * const app = createApp(App)\r\n *\r\n * // install!\r\n * app.use(i18n)\r\n * app.mount('#app')\r\n * ```\r\n *\r\n * @VueI18nGeneral\r\n */\r\nfunction createI18n(options = {}) {\r\n    // prettier-ignore\r\n    const __legacyMode = __VUE_I18N_LEGACY_API__ && isBoolean(options.legacy)\r\n        ? options.legacy\r\n        : __VUE_I18N_LEGACY_API__;\r\n    const __globalInjection = !!options.globalInjection;\r\n    const __instances = new Map();\r\n    // prettier-ignore\r\n    const __global = __VUE_I18N_LEGACY_API__ && __legacyMode\r\n        ? createVueI18n(options)\r\n        : createComposer(options);\r\n    const symbol = makeSymbol((process.env.NODE_ENV !== 'production') ? 'vue-i18n' : '');\r\n    const i18n = {\r\n        // mode\r\n        get mode() {\r\n            // prettier-ignore\r\n            return __VUE_I18N_LEGACY_API__\r\n                ? __legacyMode\r\n                    ? 'legacy'\r\n                    : 'composition'\r\n                : 'composition';\r\n        },\r\n        // install plugin\r\n        async install(app, ...options) {\r\n            if (((process.env.NODE_ENV !== 'production') || __VUE_I18N_PROD_DEVTOOLS__) && !false) {\r\n                app.__VUE_I18N__ = i18n;\r\n            }\r\n            // setup global provider\r\n            app.__VUE_I18N_SYMBOL__ = symbol;\r\n            app.provide(app.__VUE_I18N_SYMBOL__, i18n);\r\n            // global method and properties injection for Composition API\r\n            if (!__legacyMode && __globalInjection) {\r\n                injectGlobalFields(app, i18n.global);\r\n            }\r\n            // install built-in components and directive\r\n            if (__VUE_I18N_FULL_INSTALL__) {\r\n                apply(app, i18n, ...options);\r\n            }\r\n            // setup mixin for Legacy API\r\n            if (__VUE_I18N_LEGACY_API__ && __legacyMode) {\r\n                app.mixin(defineMixin(__global, __global.__composer, i18n));\r\n            }\r\n            // setup vue-devtools plugin\r\n            if (((process.env.NODE_ENV !== 'production') || __VUE_I18N_PROD_DEVTOOLS__) && !false) {\r\n                const ret = await enableDevTools(app, i18n);\r\n                if (!ret) {\r\n                    throw createI18nError(21 /* CANNOT_SETUP_VUE_DEVTOOLS_PLUGIN */);\r\n                }\r\n                const emitter = createEmitter();\r\n                if (__legacyMode) {\r\n                    const _vueI18n = __global;\r\n                    _vueI18n.__enableEmitter && _vueI18n.__enableEmitter(emitter);\r\n                }\r\n                else {\r\n                    // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n                    const _composer = __global;\r\n                    _composer[EnableEmitter] && _composer[EnableEmitter](emitter);\r\n                }\r\n                emitter.on('*', addTimelineEvent);\r\n            }\r\n        },\r\n        // global accessor\r\n        get global() {\r\n            return __global;\r\n        },\r\n        // @internal\r\n        __instances,\r\n        // @internal\r\n        __getInstance(component) {\r\n            return __instances.get(component) || null;\r\n        },\r\n        // @internal\r\n        __setInstance(component, instance) {\r\n            __instances.set(component, instance);\r\n        },\r\n        // @internal\r\n        __deleteInstance(component) {\r\n            __instances.delete(component);\r\n        }\r\n    };\r\n    return i18n;\r\n}\r\n/**\r\n * Use Composition API for Vue I18n\r\n *\r\n * @param options - An options, see {@link UseI18nOptions}\r\n *\r\n * @returns {@link Composer} instance\r\n *\r\n * @remarks\r\n * This function is mainly used by `setup`.\r\n *\r\n * If options are specified, Composer instance is created for each component and you can be localized on the component.\r\n *\r\n * If options are not specified, you can be localized using the global Composer.\r\n *\r\n * @example\r\n * case: Component resource base localization\r\n * ```html\r\n * <template>\r\n *   <form>\r\n *     <label>{{ t('language') }}</label>\r\n *     <select v-model=\"locale\">\r\n *       <option value=\"en\">en</option>\r\n *       <option value=\"ja\">ja</option>\r\n *     </select>\r\n *   </form>\r\n *   <p>message: {{ t('hello') }}</p>\r\n * </template>\r\n *\r\n * <script>\r\n * import { useI18n } from 'vue-i18n'\r\n *\r\n * export default {\r\n *  setup() {\r\n *    const { t, locale } = useI18n({\r\n *      locale: 'ja',\r\n *      messages: {\r\n *        en: { ... },\r\n *        ja: { ... }\r\n *      }\r\n *    })\r\n *    // Something to do ...\r\n *\r\n *    return { ..., t, locale }\r\n *  }\r\n * }\r\n * </script>\r\n * ```\r\n *\r\n * @VueI18nComposition\r\n */\r\nfunction useI18n(options = {}) {\r\n    const instance = getCurrentInstance();\r\n    if (instance == null) {\r\n        throw createI18nError(16 /* MUST_BE_CALL_SETUP_TOP */);\r\n    }\r\n    if (!instance.appContext.app.__VUE_I18N_SYMBOL__) {\r\n        throw createI18nError(17 /* NOT_INSLALLED */);\r\n    }\r\n    const i18n = inject(instance.appContext.app.__VUE_I18N_SYMBOL__);\r\n    /* istanbul ignore if */\r\n    if (!i18n) {\r\n        throw createI18nError(22 /* UNEXPECTED_ERROR */);\r\n    }\r\n    // prettier-ignore\r\n    const global = i18n.mode === 'composition'\r\n        ? i18n.global\r\n        : i18n.global.__composer;\r\n    // prettier-ignore\r\n    const scope = isEmptyObject(options)\r\n        ? ('__i18n' in instance.type)\r\n            ? 'local'\r\n            : 'global'\r\n        : !options.useScope\r\n            ? 'local'\r\n            : options.useScope;\r\n    if (scope === 'global') {\r\n        let messages = isObject(options.messages) ? options.messages : {};\r\n        if ('__i18nGlobal' in instance.type) {\r\n            messages = getLocaleMessages(global.locale.value, {\r\n                messages,\r\n                __i18n: instance.type.__i18nGlobal\r\n            });\r\n        }\r\n        // merge locale messages\r\n        const locales = Object.keys(messages);\r\n        if (locales.length) {\r\n            locales.forEach(locale => {\r\n                global.mergeLocaleMessage(locale, messages[locale]);\r\n            });\r\n        }\r\n        // merge datetime formats\r\n        if (isObject(options.datetimeFormats)) {\r\n            const locales = Object.keys(options.datetimeFormats);\r\n            if (locales.length) {\r\n                locales.forEach(locale => {\r\n                    global.mergeDateTimeFormat(locale, options.datetimeFormats[locale]);\r\n                });\r\n            }\r\n        }\r\n        // merge number formats\r\n        if (isObject(options.numberFormats)) {\r\n            const locales = Object.keys(options.numberFormats);\r\n            if (locales.length) {\r\n                locales.forEach(locale => {\r\n                    global.mergeNumberFormat(locale, options.numberFormats[locale]);\r\n                });\r\n            }\r\n        }\r\n        return global;\r\n    }\r\n    if (scope === 'parent') {\r\n        let composer = getComposer(i18n, instance);\r\n        if (composer == null) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                warn(getWarnMessage(12 /* NOT_FOUND_PARENT_SCOPE */));\r\n            }\r\n            composer = global;\r\n        }\r\n        return composer;\r\n    }\r\n    // scope 'local' case\r\n    if (i18n.mode === 'legacy') {\r\n        throw createI18nError(18 /* NOT_AVAILABLE_IN_LEGACY_MODE */);\r\n    }\r\n    const i18nInternal = i18n;\r\n    let composer = i18nInternal.__getInstance(instance);\r\n    if (composer == null) {\r\n        const type = instance.type;\r\n        const composerOptions = assign({}, options);\r\n        if (type.__i18n) {\r\n            composerOptions.__i18n = type.__i18n;\r\n        }\r\n        if (global) {\r\n            composerOptions.__root = global;\r\n        }\r\n        composer = createComposer(composerOptions);\r\n        setupLifeCycle(i18nInternal, instance, composer);\r\n        i18nInternal.__setInstance(instance, composer);\r\n    }\r\n    return composer;\r\n}\r\nfunction getComposer(i18n, target) {\r\n    let composer = null;\r\n    const root = target.root;\r\n    let current = target.parent;\r\n    while (current != null) {\r\n        const i18nInternal = i18n;\r\n        if (i18n.mode === 'composition') {\r\n            composer = i18nInternal.__getInstance(current);\r\n        }\r\n        else {\r\n            const vueI18n = i18nInternal.__getInstance(current);\r\n            if (vueI18n != null) {\r\n                composer = vueI18n\r\n                    .__composer;\r\n            }\r\n        }\r\n        if (composer != null) {\r\n            break;\r\n        }\r\n        if (root === current) {\r\n            break;\r\n        }\r\n        current = current.parent;\r\n    }\r\n    return composer;\r\n}\r\nfunction setupLifeCycle(i18n, target, composer) {\r\n    let emitter = null;\r\n    onMounted(() => {\r\n        // inject composer instance to DOM for intlify-devtools\r\n        if (((process.env.NODE_ENV !== 'production') || __VUE_I18N_PROD_DEVTOOLS__) &&\r\n            !false &&\r\n            target.vnode.el) {\r\n            target.vnode.el.__VUE_I18N__ = composer;\r\n            emitter = createEmitter();\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            const _composer = composer;\r\n            _composer[EnableEmitter] && _composer[EnableEmitter](emitter);\r\n            emitter.on('*', addTimelineEvent);\r\n        }\r\n    }, target);\r\n    onUnmounted(() => {\r\n        // remove composer instance from DOM for intlify-devtools\r\n        if (((process.env.NODE_ENV !== 'production') || __VUE_I18N_PROD_DEVTOOLS__) &&\r\n            !false &&\r\n            target.vnode.el &&\r\n            target.vnode.el.__VUE_I18N__) {\r\n            emitter && emitter.off('*', addTimelineEvent);\r\n            // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n            const _composer = composer;\r\n            _composer[DisableEmitter] && _composer[DisableEmitter]();\r\n            delete target.vnode.el.__VUE_I18N__;\r\n        }\r\n        i18n.__deleteInstance(target);\r\n    }, target);\r\n}\r\nconst globalExportProps = [\r\n    'locale',\r\n    'fallbackLocale',\r\n    'availableLocales'\r\n];\r\nconst globalExportMethods = ['t', 'rt', 'd', 'n', 'tm'];\r\nfunction injectGlobalFields(app, composer) {\r\n    const i18n = Object.create(null);\r\n    globalExportProps.forEach(prop => {\r\n        const desc = Object.getOwnPropertyDescriptor(composer, prop);\r\n        if (!desc) {\r\n            throw createI18nError(22 /* UNEXPECTED_ERROR */);\r\n        }\r\n        const wrap = isRef(desc.value) // check computed props\r\n            ? {\r\n                get() {\r\n                    return desc.value.value;\r\n                },\r\n                // eslint-disable-next-line @typescript-eslint/no-explicit-any\r\n                set(val) {\r\n                    desc.value.value = val;\r\n                }\r\n            }\r\n            : {\r\n                get() {\r\n                    return desc.get && desc.get();\r\n                }\r\n            };\r\n        Object.defineProperty(i18n, prop, wrap);\r\n    });\r\n    app.config.globalProperties.$i18n = i18n;\r\n    globalExportMethods.forEach(method => {\r\n        const desc = Object.getOwnPropertyDescriptor(composer, method);\r\n        if (!desc || !desc.value) {\r\n            throw createI18nError(22 /* UNEXPECTED_ERROR */);\r\n        }\r\n        Object.defineProperty(app.config.globalProperties, `$${method}`, desc);\r\n    });\r\n}\n\n// register message compiler at vue-i18n\r\nregisterMessageCompiler(compileToFunction);\r\n{\r\n    initFeatureFlags();\r\n}\r\n// NOTE: experimental !!\r\nif ((process.env.NODE_ENV !== 'production') || __INTLIFY_PROD_DEVTOOLS__) {\r\n    const target = getGlobalThis();\r\n    target.__INTLIFY__ = true;\r\n    setDevToolsHook(target.__INTLIFY_DEVTOOLS_GLOBAL_HOOK__);\r\n}\r\nif ((process.env.NODE_ENV !== 'production')) ;\n\nexport { DatetimeFormat, NumberFormat, Translation, VERSION, createI18n, useI18n, vTDirective };\n","var anObject = require('../internals/an-object');\nvar aFunction = require('../internals/a-function');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `SpeciesConstructor` abstract operation\n// https://tc39.es/ecma262/#sec-speciesconstructor\nmodule.exports = function (O, defaultConstructor) {\n  var C = anObject(O).constructor;\n  var S;\n  return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? defaultConstructor : aFunction(S);\n};\n","var IS_NODE = require('../internals/engine-is-node');\nvar V8_VERSION = require('../internals/engine-v8-version');\nvar fails = require('../internals/fails');\n\n// eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing\nmodule.exports = !!Object.getOwnPropertySymbols && !fails(function () {\n  // eslint-disable-next-line es/no-symbol -- required for testing\n  return !Symbol.sham &&\n    // Chrome 38 Symbol has incorrect toString conversion\n    // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances\n    (IS_NODE ? V8_VERSION === 38 : V8_VERSION > 37 && V8_VERSION < 41);\n});\n","'use strict'; // undocumented cb() API, needed for core, not for public API\n\nfunction destroy(err, cb) {\n  var _this = this;\n\n  var readableDestroyed = this._readableState && this._readableState.destroyed;\n  var writableDestroyed = this._writableState && this._writableState.destroyed;\n\n  if (readableDestroyed || writableDestroyed) {\n    if (cb) {\n      cb(err);\n    } else if (err) {\n      if (!this._writableState) {\n        process.nextTick(emitErrorNT, this, err);\n      } else if (!this._writableState.errorEmitted) {\n        this._writableState.errorEmitted = true;\n        process.nextTick(emitErrorNT, this, err);\n      }\n    }\n\n    return this;\n  } // we set destroyed to true before firing error callbacks in order\n  // to make it re-entrance safe in case destroy() is called within callbacks\n\n\n  if (this._readableState) {\n    this._readableState.destroyed = true;\n  } // if this is a duplex stream mark the writable part as destroyed as well\n\n\n  if (this._writableState) {\n    this._writableState.destroyed = true;\n  }\n\n  this._destroy(err || null, function (err) {\n    if (!cb && err) {\n      if (!_this._writableState) {\n        process.nextTick(emitErrorAndCloseNT, _this, err);\n      } else if (!_this._writableState.errorEmitted) {\n        _this._writableState.errorEmitted = true;\n        process.nextTick(emitErrorAndCloseNT, _this, err);\n      } else {\n        process.nextTick(emitCloseNT, _this);\n      }\n    } else if (cb) {\n      process.nextTick(emitCloseNT, _this);\n      cb(err);\n    } else {\n      process.nextTick(emitCloseNT, _this);\n    }\n  });\n\n  return this;\n}\n\nfunction emitErrorAndCloseNT(self, err) {\n  emitErrorNT(self, err);\n  emitCloseNT(self);\n}\n\nfunction emitCloseNT(self) {\n  if (self._writableState && !self._writableState.emitClose) return;\n  if (self._readableState && !self._readableState.emitClose) return;\n  self.emit('close');\n}\n\nfunction undestroy() {\n  if (this._readableState) {\n    this._readableState.destroyed = false;\n    this._readableState.reading = false;\n    this._readableState.ended = false;\n    this._readableState.endEmitted = false;\n  }\n\n  if (this._writableState) {\n    this._writableState.destroyed = false;\n    this._writableState.ended = false;\n    this._writableState.ending = false;\n    this._writableState.finalCalled = false;\n    this._writableState.prefinished = false;\n    this._writableState.finished = false;\n    this._writableState.errorEmitted = false;\n  }\n}\n\nfunction emitErrorNT(self, err) {\n  self.emit('error', err);\n}\n\nfunction errorOrDestroy(stream, err) {\n  // We have tests that rely on errors being emitted\n  // in the same tick, so changing this is semver major.\n  // For now when you opt-in to autoDestroy we allow\n  // the error to be emitted nextTick. In a future\n  // semver major update we should change the default to this.\n  var rState = stream._readableState;\n  var wState = stream._writableState;\n  if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);\n}\n\nmodule.exports = {\n  destroy: destroy,\n  undestroy: undestroy,\n  errorOrDestroy: errorOrDestroy\n};","/*!\n  * Bootstrap v5.1.3 (https://getbootstrap.com/)\n  * Copyright 2011-2021 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)\n  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n  */\n(function (global, factory) {\n  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('@popperjs/core')) :\n  typeof define === 'function' && define.amd ? define(['@popperjs/core'], factory) :\n  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.bootstrap = factory(global.Popper));\n})(this, (function (Popper) { 'use strict';\n\n  function _interopNamespace(e) {\n    if (e && e.__esModule) return e;\n    const n = Object.create(null);\n    if (e) {\n      for (const k in e) {\n        if (k !== 'default') {\n          const d = Object.getOwnPropertyDescriptor(e, k);\n          Object.defineProperty(n, k, d.get ? d : {\n            enumerable: true,\n            get: () => e[k]\n          });\n        }\n      }\n    }\n    n.default = e;\n    return Object.freeze(n);\n  }\n\n  const Popper__namespace = /*#__PURE__*/_interopNamespace(Popper);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): util/index.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const MAX_UID = 1000000;\n  const MILLISECONDS_MULTIPLIER = 1000;\n  const TRANSITION_END = 'transitionend'; // Shoutout AngusCroll (https://goo.gl/pxwQGp)\n\n  const toType = obj => {\n    if (obj === null || obj === undefined) {\n      return `${obj}`;\n    }\n\n    return {}.toString.call(obj).match(/\\s([a-z]+)/i)[1].toLowerCase();\n  };\n  /**\n   * --------------------------------------------------------------------------\n   * Public Util Api\n   * --------------------------------------------------------------------------\n   */\n\n\n  const getUID = prefix => {\n    do {\n      prefix += Math.floor(Math.random() * MAX_UID);\n    } while (document.getElementById(prefix));\n\n    return prefix;\n  };\n\n  const getSelector = element => {\n    let selector = element.getAttribute('data-bs-target');\n\n    if (!selector || selector === '#') {\n      let hrefAttr = element.getAttribute('href'); // The only valid content that could double as a selector are IDs or classes,\n      // so everything starting with `#` or `.`. If a \"real\" URL is used as the selector,\n      // `document.querySelector` will rightfully complain it is invalid.\n      // See https://github.com/twbs/bootstrap/issues/32273\n\n      if (!hrefAttr || !hrefAttr.includes('#') && !hrefAttr.startsWith('.')) {\n        return null;\n      } // Just in case some CMS puts out a full URL with the anchor appended\n\n\n      if (hrefAttr.includes('#') && !hrefAttr.startsWith('#')) {\n        hrefAttr = `#${hrefAttr.split('#')[1]}`;\n      }\n\n      selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : null;\n    }\n\n    return selector;\n  };\n\n  const getSelectorFromElement = element => {\n    const selector = getSelector(element);\n\n    if (selector) {\n      return document.querySelector(selector) ? selector : null;\n    }\n\n    return null;\n  };\n\n  const getElementFromSelector = element => {\n    const selector = getSelector(element);\n    return selector ? document.querySelector(selector) : null;\n  };\n\n  const getTransitionDurationFromElement = element => {\n    if (!element) {\n      return 0;\n    } // Get transition-duration of the element\n\n\n    let {\n      transitionDuration,\n      transitionDelay\n    } = window.getComputedStyle(element);\n    const floatTransitionDuration = Number.parseFloat(transitionDuration);\n    const floatTransitionDelay = Number.parseFloat(transitionDelay); // Return 0 if element or transition duration is not found\n\n    if (!floatTransitionDuration && !floatTransitionDelay) {\n      return 0;\n    } // If multiple durations are defined, take the first\n\n\n    transitionDuration = transitionDuration.split(',')[0];\n    transitionDelay = transitionDelay.split(',')[0];\n    return (Number.parseFloat(transitionDuration) + Number.parseFloat(transitionDelay)) * MILLISECONDS_MULTIPLIER;\n  };\n\n  const triggerTransitionEnd = element => {\n    element.dispatchEvent(new Event(TRANSITION_END));\n  };\n\n  const isElement = obj => {\n    if (!obj || typeof obj !== 'object') {\n      return false;\n    }\n\n    if (typeof obj.jquery !== 'undefined') {\n      obj = obj[0];\n    }\n\n    return typeof obj.nodeType !== 'undefined';\n  };\n\n  const getElement = obj => {\n    if (isElement(obj)) {\n      // it's a jQuery object or a node element\n      return obj.jquery ? obj[0] : obj;\n    }\n\n    if (typeof obj === 'string' && obj.length > 0) {\n      return document.querySelector(obj);\n    }\n\n    return null;\n  };\n\n  const typeCheckConfig = (componentName, config, configTypes) => {\n    Object.keys(configTypes).forEach(property => {\n      const expectedTypes = configTypes[property];\n      const value = config[property];\n      const valueType = value && isElement(value) ? 'element' : toType(value);\n\n      if (!new RegExp(expectedTypes).test(valueType)) {\n        throw new TypeError(`${componentName.toUpperCase()}: Option \"${property}\" provided type \"${valueType}\" but expected type \"${expectedTypes}\".`);\n      }\n    });\n  };\n\n  const isVisible = element => {\n    if (!isElement(element) || element.getClientRects().length === 0) {\n      return false;\n    }\n\n    return getComputedStyle(element).getPropertyValue('visibility') === 'visible';\n  };\n\n  const isDisabled = element => {\n    if (!element || element.nodeType !== Node.ELEMENT_NODE) {\n      return true;\n    }\n\n    if (element.classList.contains('disabled')) {\n      return true;\n    }\n\n    if (typeof element.disabled !== 'undefined') {\n      return element.disabled;\n    }\n\n    return element.hasAttribute('disabled') && element.getAttribute('disabled') !== 'false';\n  };\n\n  const findShadowRoot = element => {\n    if (!document.documentElement.attachShadow) {\n      return null;\n    } // Can find the shadow root otherwise it'll return the document\n\n\n    if (typeof element.getRootNode === 'function') {\n      const root = element.getRootNode();\n      return root instanceof ShadowRoot ? root : null;\n    }\n\n    if (element instanceof ShadowRoot) {\n      return element;\n    } // when we don't find a shadow root\n\n\n    if (!element.parentNode) {\n      return null;\n    }\n\n    return findShadowRoot(element.parentNode);\n  };\n\n  const noop = () => {};\n  /**\n   * Trick to restart an element's animation\n   *\n   * @param {HTMLElement} element\n   * @return void\n   *\n   * @see https://www.charistheo.io/blog/2021/02/restart-a-css-animation-with-javascript/#restarting-a-css-animation\n   */\n\n\n  const reflow = element => {\n    // eslint-disable-next-line no-unused-expressions\n    element.offsetHeight;\n  };\n\n  const getjQuery = () => {\n    const {\n      jQuery\n    } = window;\n\n    if (jQuery && !document.body.hasAttribute('data-bs-no-jquery')) {\n      return jQuery;\n    }\n\n    return null;\n  };\n\n  const DOMContentLoadedCallbacks = [];\n\n  const onDOMContentLoaded = callback => {\n    if (document.readyState === 'loading') {\n      // add listener on the first call when the document is in loading state\n      if (!DOMContentLoadedCallbacks.length) {\n        document.addEventListener('DOMContentLoaded', () => {\n          DOMContentLoadedCallbacks.forEach(callback => callback());\n        });\n      }\n\n      DOMContentLoadedCallbacks.push(callback);\n    } else {\n      callback();\n    }\n  };\n\n  const isRTL = () => document.documentElement.dir === 'rtl';\n\n  const defineJQueryPlugin = plugin => {\n    onDOMContentLoaded(() => {\n      const $ = getjQuery();\n      /* istanbul ignore if */\n\n      if ($) {\n        const name = plugin.NAME;\n        const JQUERY_NO_CONFLICT = $.fn[name];\n        $.fn[name] = plugin.jQueryInterface;\n        $.fn[name].Constructor = plugin;\n\n        $.fn[name].noConflict = () => {\n          $.fn[name] = JQUERY_NO_CONFLICT;\n          return plugin.jQueryInterface;\n        };\n      }\n    });\n  };\n\n  const execute = callback => {\n    if (typeof callback === 'function') {\n      callback();\n    }\n  };\n\n  const executeAfterTransition = (callback, transitionElement, waitForTransition = true) => {\n    if (!waitForTransition) {\n      execute(callback);\n      return;\n    }\n\n    const durationPadding = 5;\n    const emulatedDuration = getTransitionDurationFromElement(transitionElement) + durationPadding;\n    let called = false;\n\n    const handler = ({\n      target\n    }) => {\n      if (target !== transitionElement) {\n        return;\n      }\n\n      called = true;\n      transitionElement.removeEventListener(TRANSITION_END, handler);\n      execute(callback);\n    };\n\n    transitionElement.addEventListener(TRANSITION_END, handler);\n    setTimeout(() => {\n      if (!called) {\n        triggerTransitionEnd(transitionElement);\n      }\n    }, emulatedDuration);\n  };\n  /**\n   * Return the previous/next element of a list.\n   *\n   * @param {array} list    The list of elements\n   * @param activeElement   The active element\n   * @param shouldGetNext   Choose to get next or previous element\n   * @param isCycleAllowed\n   * @return {Element|elem} The proper element\n   */\n\n\n  const getNextActiveElement = (list, activeElement, shouldGetNext, isCycleAllowed) => {\n    let index = list.indexOf(activeElement); // if the element does not exist in the list return an element depending on the direction and if cycle is allowed\n\n    if (index === -1) {\n      return list[!shouldGetNext && isCycleAllowed ? list.length - 1 : 0];\n    }\n\n    const listLength = list.length;\n    index += shouldGetNext ? 1 : -1;\n\n    if (isCycleAllowed) {\n      index = (index + listLength) % listLength;\n    }\n\n    return list[Math.max(0, Math.min(index, listLength - 1))];\n  };\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): dom/event-handler.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const namespaceRegex = /[^.]*(?=\\..*)\\.|.*/;\n  const stripNameRegex = /\\..*/;\n  const stripUidRegex = /::\\d+$/;\n  const eventRegistry = {}; // Events storage\n\n  let uidEvent = 1;\n  const customEvents = {\n    mouseenter: 'mouseover',\n    mouseleave: 'mouseout'\n  };\n  const customEventsRegex = /^(mouseenter|mouseleave)/i;\n  const nativeEvents = new Set(['click', 'dblclick', 'mouseup', 'mousedown', 'contextmenu', 'mousewheel', 'DOMMouseScroll', 'mouseover', 'mouseout', 'mousemove', 'selectstart', 'selectend', 'keydown', 'keypress', 'keyup', 'orientationchange', 'touchstart', 'touchmove', 'touchend', 'touchcancel', 'pointerdown', 'pointermove', 'pointerup', 'pointerleave', 'pointercancel', 'gesturestart', 'gesturechange', 'gestureend', 'focus', 'blur', 'change', 'reset', 'select', 'submit', 'focusin', 'focusout', 'load', 'unload', 'beforeunload', 'resize', 'move', 'DOMContentLoaded', 'readystatechange', 'error', 'abort', 'scroll']);\n  /**\n   * ------------------------------------------------------------------------\n   * Private methods\n   * ------------------------------------------------------------------------\n   */\n\n  function getUidEvent(element, uid) {\n    return uid && `${uid}::${uidEvent++}` || element.uidEvent || uidEvent++;\n  }\n\n  function getEvent(element) {\n    const uid = getUidEvent(element);\n    element.uidEvent = uid;\n    eventRegistry[uid] = eventRegistry[uid] || {};\n    return eventRegistry[uid];\n  }\n\n  function bootstrapHandler(element, fn) {\n    return function handler(event) {\n      event.delegateTarget = element;\n\n      if (handler.oneOff) {\n        EventHandler.off(element, event.type, fn);\n      }\n\n      return fn.apply(element, [event]);\n    };\n  }\n\n  function bootstrapDelegationHandler(element, selector, fn) {\n    return function handler(event) {\n      const domElements = element.querySelectorAll(selector);\n\n      for (let {\n        target\n      } = event; target && target !== this; target = target.parentNode) {\n        for (let i = domElements.length; i--;) {\n          if (domElements[i] === target) {\n            event.delegateTarget = target;\n\n            if (handler.oneOff) {\n              EventHandler.off(element, event.type, selector, fn);\n            }\n\n            return fn.apply(target, [event]);\n          }\n        }\n      } // To please ESLint\n\n\n      return null;\n    };\n  }\n\n  function findHandler(events, handler, delegationSelector = null) {\n    const uidEventList = Object.keys(events);\n\n    for (let i = 0, len = uidEventList.length; i < len; i++) {\n      const event = events[uidEventList[i]];\n\n      if (event.originalHandler === handler && event.delegationSelector === delegationSelector) {\n        return event;\n      }\n    }\n\n    return null;\n  }\n\n  function normalizeParams(originalTypeEvent, handler, delegationFn) {\n    const delegation = typeof handler === 'string';\n    const originalHandler = delegation ? delegationFn : handler;\n    let typeEvent = getTypeEvent(originalTypeEvent);\n    const isNative = nativeEvents.has(typeEvent);\n\n    if (!isNative) {\n      typeEvent = originalTypeEvent;\n    }\n\n    return [delegation, originalHandler, typeEvent];\n  }\n\n  function addHandler(element, originalTypeEvent, handler, delegationFn, oneOff) {\n    if (typeof originalTypeEvent !== 'string' || !element) {\n      return;\n    }\n\n    if (!handler) {\n      handler = delegationFn;\n      delegationFn = null;\n    } // in case of mouseenter or mouseleave wrap the handler within a function that checks for its DOM position\n    // this prevents the handler from being dispatched the same way as mouseover or mouseout does\n\n\n    if (customEventsRegex.test(originalTypeEvent)) {\n      const wrapFn = fn => {\n        return function (event) {\n          if (!event.relatedTarget || event.relatedTarget !== event.delegateTarget && !event.delegateTarget.contains(event.relatedTarget)) {\n            return fn.call(this, event);\n          }\n        };\n      };\n\n      if (delegationFn) {\n        delegationFn = wrapFn(delegationFn);\n      } else {\n        handler = wrapFn(handler);\n      }\n    }\n\n    const [delegation, originalHandler, typeEvent] = normalizeParams(originalTypeEvent, handler, delegationFn);\n    const events = getEvent(element);\n    const handlers = events[typeEvent] || (events[typeEvent] = {});\n    const previousFn = findHandler(handlers, originalHandler, delegation ? handler : null);\n\n    if (previousFn) {\n      previousFn.oneOff = previousFn.oneOff && oneOff;\n      return;\n    }\n\n    const uid = getUidEvent(originalHandler, originalTypeEvent.replace(namespaceRegex, ''));\n    const fn = delegation ? bootstrapDelegationHandler(element, handler, delegationFn) : bootstrapHandler(element, handler);\n    fn.delegationSelector = delegation ? handler : null;\n    fn.originalHandler = originalHandler;\n    fn.oneOff = oneOff;\n    fn.uidEvent = uid;\n    handlers[uid] = fn;\n    element.addEventListener(typeEvent, fn, delegation);\n  }\n\n  function removeHandler(element, events, typeEvent, handler, delegationSelector) {\n    const fn = findHandler(events[typeEvent], handler, delegationSelector);\n\n    if (!fn) {\n      return;\n    }\n\n    element.removeEventListener(typeEvent, fn, Boolean(delegationSelector));\n    delete events[typeEvent][fn.uidEvent];\n  }\n\n  function removeNamespacedHandlers(element, events, typeEvent, namespace) {\n    const storeElementEvent = events[typeEvent] || {};\n    Object.keys(storeElementEvent).forEach(handlerKey => {\n      if (handlerKey.includes(namespace)) {\n        const event = storeElementEvent[handlerKey];\n        removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector);\n      }\n    });\n  }\n\n  function getTypeEvent(event) {\n    // allow to get the native events from namespaced events ('click.bs.button' --> 'click')\n    event = event.replace(stripNameRegex, '');\n    return customEvents[event] || event;\n  }\n\n  const EventHandler = {\n    on(element, event, handler, delegationFn) {\n      addHandler(element, event, handler, delegationFn, false);\n    },\n\n    one(element, event, handler, delegationFn) {\n      addHandler(element, event, handler, delegationFn, true);\n    },\n\n    off(element, originalTypeEvent, handler, delegationFn) {\n      if (typeof originalTypeEvent !== 'string' || !element) {\n        return;\n      }\n\n      const [delegation, originalHandler, typeEvent] = normalizeParams(originalTypeEvent, handler, delegationFn);\n      const inNamespace = typeEvent !== originalTypeEvent;\n      const events = getEvent(element);\n      const isNamespace = originalTypeEvent.startsWith('.');\n\n      if (typeof originalHandler !== 'undefined') {\n        // Simplest case: handler is passed, remove that listener ONLY.\n        if (!events || !events[typeEvent]) {\n          return;\n        }\n\n        removeHandler(element, events, typeEvent, originalHandler, delegation ? handler : null);\n        return;\n      }\n\n      if (isNamespace) {\n        Object.keys(events).forEach(elementEvent => {\n          removeNamespacedHandlers(element, events, elementEvent, originalTypeEvent.slice(1));\n        });\n      }\n\n      const storeElementEvent = events[typeEvent] || {};\n      Object.keys(storeElementEvent).forEach(keyHandlers => {\n        const handlerKey = keyHandlers.replace(stripUidRegex, '');\n\n        if (!inNamespace || originalTypeEvent.includes(handlerKey)) {\n          const event = storeElementEvent[keyHandlers];\n          removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector);\n        }\n      });\n    },\n\n    trigger(element, event, args) {\n      if (typeof event !== 'string' || !element) {\n        return null;\n      }\n\n      const $ = getjQuery();\n      const typeEvent = getTypeEvent(event);\n      const inNamespace = event !== typeEvent;\n      const isNative = nativeEvents.has(typeEvent);\n      let jQueryEvent;\n      let bubbles = true;\n      let nativeDispatch = true;\n      let defaultPrevented = false;\n      let evt = null;\n\n      if (inNamespace && $) {\n        jQueryEvent = $.Event(event, args);\n        $(element).trigger(jQueryEvent);\n        bubbles = !jQueryEvent.isPropagationStopped();\n        nativeDispatch = !jQueryEvent.isImmediatePropagationStopped();\n        defaultPrevented = jQueryEvent.isDefaultPrevented();\n      }\n\n      if (isNative) {\n        evt = document.createEvent('HTMLEvents');\n        evt.initEvent(typeEvent, bubbles, true);\n      } else {\n        evt = new CustomEvent(event, {\n          bubbles,\n          cancelable: true\n        });\n      } // merge custom information in our event\n\n\n      if (typeof args !== 'undefined') {\n        Object.keys(args).forEach(key => {\n          Object.defineProperty(evt, key, {\n            get() {\n              return args[key];\n            }\n\n          });\n        });\n      }\n\n      if (defaultPrevented) {\n        evt.preventDefault();\n      }\n\n      if (nativeDispatch) {\n        element.dispatchEvent(evt);\n      }\n\n      if (evt.defaultPrevented && typeof jQueryEvent !== 'undefined') {\n        jQueryEvent.preventDefault();\n      }\n\n      return evt;\n    }\n\n  };\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): dom/data.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n  const elementMap = new Map();\n  const Data = {\n    set(element, key, instance) {\n      if (!elementMap.has(element)) {\n        elementMap.set(element, new Map());\n      }\n\n      const instanceMap = elementMap.get(element); // make it clear we only want one instance per element\n      // can be removed later when multiple key/instances are fine to be used\n\n      if (!instanceMap.has(key) && instanceMap.size !== 0) {\n        // eslint-disable-next-line no-console\n        console.error(`Bootstrap doesn't allow more than one instance per element. Bound instance: ${Array.from(instanceMap.keys())[0]}.`);\n        return;\n      }\n\n      instanceMap.set(key, instance);\n    },\n\n    get(element, key) {\n      if (elementMap.has(element)) {\n        return elementMap.get(element).get(key) || null;\n      }\n\n      return null;\n    },\n\n    remove(element, key) {\n      if (!elementMap.has(element)) {\n        return;\n      }\n\n      const instanceMap = elementMap.get(element);\n      instanceMap.delete(key); // free up element references if there are no instances left for an element\n\n      if (instanceMap.size === 0) {\n        elementMap.delete(element);\n      }\n    }\n\n  };\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): base-component.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const VERSION = '5.1.3';\n\n  class BaseComponent {\n    constructor(element) {\n      element = getElement(element);\n\n      if (!element) {\n        return;\n      }\n\n      this._element = element;\n      Data.set(this._element, this.constructor.DATA_KEY, this);\n    }\n\n    dispose() {\n      Data.remove(this._element, this.constructor.DATA_KEY);\n      EventHandler.off(this._element, this.constructor.EVENT_KEY);\n      Object.getOwnPropertyNames(this).forEach(propertyName => {\n        this[propertyName] = null;\n      });\n    }\n\n    _queueCallback(callback, element, isAnimated = true) {\n      executeAfterTransition(callback, element, isAnimated);\n    }\n    /** Static */\n\n\n    static getInstance(element) {\n      return Data.get(getElement(element), this.DATA_KEY);\n    }\n\n    static getOrCreateInstance(element, config = {}) {\n      return this.getInstance(element) || new this(element, typeof config === 'object' ? config : null);\n    }\n\n    static get VERSION() {\n      return VERSION;\n    }\n\n    static get NAME() {\n      throw new Error('You have to implement the static method \"NAME\", for each component!');\n    }\n\n    static get DATA_KEY() {\n      return `bs.${this.NAME}`;\n    }\n\n    static get EVENT_KEY() {\n      return `.${this.DATA_KEY}`;\n    }\n\n  }\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): util/component-functions.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n\n  const enableDismissTrigger = (component, method = 'hide') => {\n    const clickEvent = `click.dismiss${component.EVENT_KEY}`;\n    const name = component.NAME;\n    EventHandler.on(document, clickEvent, `[data-bs-dismiss=\"${name}\"]`, function (event) {\n      if (['A', 'AREA'].includes(this.tagName)) {\n        event.preventDefault();\n      }\n\n      if (isDisabled(this)) {\n        return;\n      }\n\n      const target = getElementFromSelector(this) || this.closest(`.${name}`);\n      const instance = component.getOrCreateInstance(target); // Method argument is left, for Alert and only, as it doesn't implement the 'hide' method\n\n      instance[method]();\n    });\n  };\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): alert.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$d = 'alert';\n  const DATA_KEY$c = 'bs.alert';\n  const EVENT_KEY$c = `.${DATA_KEY$c}`;\n  const EVENT_CLOSE = `close${EVENT_KEY$c}`;\n  const EVENT_CLOSED = `closed${EVENT_KEY$c}`;\n  const CLASS_NAME_FADE$5 = 'fade';\n  const CLASS_NAME_SHOW$8 = 'show';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Alert extends BaseComponent {\n    // Getters\n    static get NAME() {\n      return NAME$d;\n    } // Public\n\n\n    close() {\n      const closeEvent = EventHandler.trigger(this._element, EVENT_CLOSE);\n\n      if (closeEvent.defaultPrevented) {\n        return;\n      }\n\n      this._element.classList.remove(CLASS_NAME_SHOW$8);\n\n      const isAnimated = this._element.classList.contains(CLASS_NAME_FADE$5);\n\n      this._queueCallback(() => this._destroyElement(), this._element, isAnimated);\n    } // Private\n\n\n    _destroyElement() {\n      this._element.remove();\n\n      EventHandler.trigger(this._element, EVENT_CLOSED);\n      this.dispose();\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Alert.getOrCreateInstance(this);\n\n        if (typeof config !== 'string') {\n          return;\n        }\n\n        if (data[config] === undefined || config.startsWith('_') || config === 'constructor') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config](this);\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  enableDismissTrigger(Alert, 'close');\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Alert to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Alert);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): button.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$c = 'button';\n  const DATA_KEY$b = 'bs.button';\n  const EVENT_KEY$b = `.${DATA_KEY$b}`;\n  const DATA_API_KEY$7 = '.data-api';\n  const CLASS_NAME_ACTIVE$3 = 'active';\n  const SELECTOR_DATA_TOGGLE$5 = '[data-bs-toggle=\"button\"]';\n  const EVENT_CLICK_DATA_API$6 = `click${EVENT_KEY$b}${DATA_API_KEY$7}`;\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Button extends BaseComponent {\n    // Getters\n    static get NAME() {\n      return NAME$c;\n    } // Public\n\n\n    toggle() {\n      // Toggle class and sync the `aria-pressed` attribute with the return value of the `.toggle()` method\n      this._element.setAttribute('aria-pressed', this._element.classList.toggle(CLASS_NAME_ACTIVE$3));\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Button.getOrCreateInstance(this);\n\n        if (config === 'toggle') {\n          data[config]();\n        }\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_CLICK_DATA_API$6, SELECTOR_DATA_TOGGLE$5, event => {\n    event.preventDefault();\n    const button = event.target.closest(SELECTOR_DATA_TOGGLE$5);\n    const data = Button.getOrCreateInstance(button);\n    data.toggle();\n  });\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Button to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Button);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): dom/manipulator.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  function normalizeData(val) {\n    if (val === 'true') {\n      return true;\n    }\n\n    if (val === 'false') {\n      return false;\n    }\n\n    if (val === Number(val).toString()) {\n      return Number(val);\n    }\n\n    if (val === '' || val === 'null') {\n      return null;\n    }\n\n    return val;\n  }\n\n  function normalizeDataKey(key) {\n    return key.replace(/[A-Z]/g, chr => `-${chr.toLowerCase()}`);\n  }\n\n  const Manipulator = {\n    setDataAttribute(element, key, value) {\n      element.setAttribute(`data-bs-${normalizeDataKey(key)}`, value);\n    },\n\n    removeDataAttribute(element, key) {\n      element.removeAttribute(`data-bs-${normalizeDataKey(key)}`);\n    },\n\n    getDataAttributes(element) {\n      if (!element) {\n        return {};\n      }\n\n      const attributes = {};\n      Object.keys(element.dataset).filter(key => key.startsWith('bs')).forEach(key => {\n        let pureKey = key.replace(/^bs/, '');\n        pureKey = pureKey.charAt(0).toLowerCase() + pureKey.slice(1, pureKey.length);\n        attributes[pureKey] = normalizeData(element.dataset[key]);\n      });\n      return attributes;\n    },\n\n    getDataAttribute(element, key) {\n      return normalizeData(element.getAttribute(`data-bs-${normalizeDataKey(key)}`));\n    },\n\n    offset(element) {\n      const rect = element.getBoundingClientRect();\n      return {\n        top: rect.top + window.pageYOffset,\n        left: rect.left + window.pageXOffset\n      };\n    },\n\n    position(element) {\n      return {\n        top: element.offsetTop,\n        left: element.offsetLeft\n      };\n    }\n\n  };\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): dom/selector-engine.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const NODE_TEXT = 3;\n  const SelectorEngine = {\n    find(selector, element = document.documentElement) {\n      return [].concat(...Element.prototype.querySelectorAll.call(element, selector));\n    },\n\n    findOne(selector, element = document.documentElement) {\n      return Element.prototype.querySelector.call(element, selector);\n    },\n\n    children(element, selector) {\n      return [].concat(...element.children).filter(child => child.matches(selector));\n    },\n\n    parents(element, selector) {\n      const parents = [];\n      let ancestor = element.parentNode;\n\n      while (ancestor && ancestor.nodeType === Node.ELEMENT_NODE && ancestor.nodeType !== NODE_TEXT) {\n        if (ancestor.matches(selector)) {\n          parents.push(ancestor);\n        }\n\n        ancestor = ancestor.parentNode;\n      }\n\n      return parents;\n    },\n\n    prev(element, selector) {\n      let previous = element.previousElementSibling;\n\n      while (previous) {\n        if (previous.matches(selector)) {\n          return [previous];\n        }\n\n        previous = previous.previousElementSibling;\n      }\n\n      return [];\n    },\n\n    next(element, selector) {\n      let next = element.nextElementSibling;\n\n      while (next) {\n        if (next.matches(selector)) {\n          return [next];\n        }\n\n        next = next.nextElementSibling;\n      }\n\n      return [];\n    },\n\n    focusableChildren(element) {\n      const focusables = ['a', 'button', 'input', 'textarea', 'select', 'details', '[tabindex]', '[contenteditable=\"true\"]'].map(selector => `${selector}:not([tabindex^=\"-\"])`).join(', ');\n      return this.find(focusables, element).filter(el => !isDisabled(el) && isVisible(el));\n    }\n\n  };\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): carousel.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$b = 'carousel';\n  const DATA_KEY$a = 'bs.carousel';\n  const EVENT_KEY$a = `.${DATA_KEY$a}`;\n  const DATA_API_KEY$6 = '.data-api';\n  const ARROW_LEFT_KEY = 'ArrowLeft';\n  const ARROW_RIGHT_KEY = 'ArrowRight';\n  const TOUCHEVENT_COMPAT_WAIT = 500; // Time for mouse compat events to fire after touch\n\n  const SWIPE_THRESHOLD = 40;\n  const Default$a = {\n    interval: 5000,\n    keyboard: true,\n    slide: false,\n    pause: 'hover',\n    wrap: true,\n    touch: true\n  };\n  const DefaultType$a = {\n    interval: '(number|boolean)',\n    keyboard: 'boolean',\n    slide: '(boolean|string)',\n    pause: '(string|boolean)',\n    wrap: 'boolean',\n    touch: 'boolean'\n  };\n  const ORDER_NEXT = 'next';\n  const ORDER_PREV = 'prev';\n  const DIRECTION_LEFT = 'left';\n  const DIRECTION_RIGHT = 'right';\n  const KEY_TO_DIRECTION = {\n    [ARROW_LEFT_KEY]: DIRECTION_RIGHT,\n    [ARROW_RIGHT_KEY]: DIRECTION_LEFT\n  };\n  const EVENT_SLIDE = `slide${EVENT_KEY$a}`;\n  const EVENT_SLID = `slid${EVENT_KEY$a}`;\n  const EVENT_KEYDOWN = `keydown${EVENT_KEY$a}`;\n  const EVENT_MOUSEENTER = `mouseenter${EVENT_KEY$a}`;\n  const EVENT_MOUSELEAVE = `mouseleave${EVENT_KEY$a}`;\n  const EVENT_TOUCHSTART = `touchstart${EVENT_KEY$a}`;\n  const EVENT_TOUCHMOVE = `touchmove${EVENT_KEY$a}`;\n  const EVENT_TOUCHEND = `touchend${EVENT_KEY$a}`;\n  const EVENT_POINTERDOWN = `pointerdown${EVENT_KEY$a}`;\n  const EVENT_POINTERUP = `pointerup${EVENT_KEY$a}`;\n  const EVENT_DRAG_START = `dragstart${EVENT_KEY$a}`;\n  const EVENT_LOAD_DATA_API$2 = `load${EVENT_KEY$a}${DATA_API_KEY$6}`;\n  const EVENT_CLICK_DATA_API$5 = `click${EVENT_KEY$a}${DATA_API_KEY$6}`;\n  const CLASS_NAME_CAROUSEL = 'carousel';\n  const CLASS_NAME_ACTIVE$2 = 'active';\n  const CLASS_NAME_SLIDE = 'slide';\n  const CLASS_NAME_END = 'carousel-item-end';\n  const CLASS_NAME_START = 'carousel-item-start';\n  const CLASS_NAME_NEXT = 'carousel-item-next';\n  const CLASS_NAME_PREV = 'carousel-item-prev';\n  const CLASS_NAME_POINTER_EVENT = 'pointer-event';\n  const SELECTOR_ACTIVE$1 = '.active';\n  const SELECTOR_ACTIVE_ITEM = '.active.carousel-item';\n  const SELECTOR_ITEM = '.carousel-item';\n  const SELECTOR_ITEM_IMG = '.carousel-item img';\n  const SELECTOR_NEXT_PREV = '.carousel-item-next, .carousel-item-prev';\n  const SELECTOR_INDICATORS = '.carousel-indicators';\n  const SELECTOR_INDICATOR = '[data-bs-target]';\n  const SELECTOR_DATA_SLIDE = '[data-bs-slide], [data-bs-slide-to]';\n  const SELECTOR_DATA_RIDE = '[data-bs-ride=\"carousel\"]';\n  const POINTER_TYPE_TOUCH = 'touch';\n  const POINTER_TYPE_PEN = 'pen';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Carousel extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._items = null;\n      this._interval = null;\n      this._activeElement = null;\n      this._isPaused = false;\n      this._isSliding = false;\n      this.touchTimeout = null;\n      this.touchStartX = 0;\n      this.touchDeltaX = 0;\n      this._config = this._getConfig(config);\n      this._indicatorsElement = SelectorEngine.findOne(SELECTOR_INDICATORS, this._element);\n      this._touchSupported = 'ontouchstart' in document.documentElement || navigator.maxTouchPoints > 0;\n      this._pointerEvent = Boolean(window.PointerEvent);\n\n      this._addEventListeners();\n    } // Getters\n\n\n    static get Default() {\n      return Default$a;\n    }\n\n    static get NAME() {\n      return NAME$b;\n    } // Public\n\n\n    next() {\n      this._slide(ORDER_NEXT);\n    }\n\n    nextWhenVisible() {\n      // Don't call next when the page isn't visible\n      // or the carousel or its parent isn't visible\n      if (!document.hidden && isVisible(this._element)) {\n        this.next();\n      }\n    }\n\n    prev() {\n      this._slide(ORDER_PREV);\n    }\n\n    pause(event) {\n      if (!event) {\n        this._isPaused = true;\n      }\n\n      if (SelectorEngine.findOne(SELECTOR_NEXT_PREV, this._element)) {\n        triggerTransitionEnd(this._element);\n        this.cycle(true);\n      }\n\n      clearInterval(this._interval);\n      this._interval = null;\n    }\n\n    cycle(event) {\n      if (!event) {\n        this._isPaused = false;\n      }\n\n      if (this._interval) {\n        clearInterval(this._interval);\n        this._interval = null;\n      }\n\n      if (this._config && this._config.interval && !this._isPaused) {\n        this._updateInterval();\n\n        this._interval = setInterval((document.visibilityState ? this.nextWhenVisible : this.next).bind(this), this._config.interval);\n      }\n    }\n\n    to(index) {\n      this._activeElement = SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);\n\n      const activeIndex = this._getItemIndex(this._activeElement);\n\n      if (index > this._items.length - 1 || index < 0) {\n        return;\n      }\n\n      if (this._isSliding) {\n        EventHandler.one(this._element, EVENT_SLID, () => this.to(index));\n        return;\n      }\n\n      if (activeIndex === index) {\n        this.pause();\n        this.cycle();\n        return;\n      }\n\n      const order = index > activeIndex ? ORDER_NEXT : ORDER_PREV;\n\n      this._slide(order, this._items[index]);\n    } // Private\n\n\n    _getConfig(config) {\n      config = { ...Default$a,\n        ...Manipulator.getDataAttributes(this._element),\n        ...(typeof config === 'object' ? config : {})\n      };\n      typeCheckConfig(NAME$b, config, DefaultType$a);\n      return config;\n    }\n\n    _handleSwipe() {\n      const absDeltax = Math.abs(this.touchDeltaX);\n\n      if (absDeltax <= SWIPE_THRESHOLD) {\n        return;\n      }\n\n      const direction = absDeltax / this.touchDeltaX;\n      this.touchDeltaX = 0;\n\n      if (!direction) {\n        return;\n      }\n\n      this._slide(direction > 0 ? DIRECTION_RIGHT : DIRECTION_LEFT);\n    }\n\n    _addEventListeners() {\n      if (this._config.keyboard) {\n        EventHandler.on(this._element, EVENT_KEYDOWN, event => this._keydown(event));\n      }\n\n      if (this._config.pause === 'hover') {\n        EventHandler.on(this._element, EVENT_MOUSEENTER, event => this.pause(event));\n        EventHandler.on(this._element, EVENT_MOUSELEAVE, event => this.cycle(event));\n      }\n\n      if (this._config.touch && this._touchSupported) {\n        this._addTouchEventListeners();\n      }\n    }\n\n    _addTouchEventListeners() {\n      const hasPointerPenTouch = event => {\n        return this._pointerEvent && (event.pointerType === POINTER_TYPE_PEN || event.pointerType === POINTER_TYPE_TOUCH);\n      };\n\n      const start = event => {\n        if (hasPointerPenTouch(event)) {\n          this.touchStartX = event.clientX;\n        } else if (!this._pointerEvent) {\n          this.touchStartX = event.touches[0].clientX;\n        }\n      };\n\n      const move = event => {\n        // ensure swiping with one touch and not pinching\n        this.touchDeltaX = event.touches && event.touches.length > 1 ? 0 : event.touches[0].clientX - this.touchStartX;\n      };\n\n      const end = event => {\n        if (hasPointerPenTouch(event)) {\n          this.touchDeltaX = event.clientX - this.touchStartX;\n        }\n\n        this._handleSwipe();\n\n        if (this._config.pause === 'hover') {\n          // If it's a touch-enabled device, mouseenter/leave are fired as\n          // part of the mouse compatibility events on first tap - the carousel\n          // would stop cycling until user tapped out of it;\n          // here, we listen for touchend, explicitly pause the carousel\n          // (as if it's the second time we tap on it, mouseenter compat event\n          // is NOT fired) and after a timeout (to allow for mouse compatibility\n          // events to fire) we explicitly restart cycling\n          this.pause();\n\n          if (this.touchTimeout) {\n            clearTimeout(this.touchTimeout);\n          }\n\n          this.touchTimeout = setTimeout(event => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval);\n        }\n      };\n\n      SelectorEngine.find(SELECTOR_ITEM_IMG, this._element).forEach(itemImg => {\n        EventHandler.on(itemImg, EVENT_DRAG_START, event => event.preventDefault());\n      });\n\n      if (this._pointerEvent) {\n        EventHandler.on(this._element, EVENT_POINTERDOWN, event => start(event));\n        EventHandler.on(this._element, EVENT_POINTERUP, event => end(event));\n\n        this._element.classList.add(CLASS_NAME_POINTER_EVENT);\n      } else {\n        EventHandler.on(this._element, EVENT_TOUCHSTART, event => start(event));\n        EventHandler.on(this._element, EVENT_TOUCHMOVE, event => move(event));\n        EventHandler.on(this._element, EVENT_TOUCHEND, event => end(event));\n      }\n    }\n\n    _keydown(event) {\n      if (/input|textarea/i.test(event.target.tagName)) {\n        return;\n      }\n\n      const direction = KEY_TO_DIRECTION[event.key];\n\n      if (direction) {\n        event.preventDefault();\n\n        this._slide(direction);\n      }\n    }\n\n    _getItemIndex(element) {\n      this._items = element && element.parentNode ? SelectorEngine.find(SELECTOR_ITEM, element.parentNode) : [];\n      return this._items.indexOf(element);\n    }\n\n    _getItemByOrder(order, activeElement) {\n      const isNext = order === ORDER_NEXT;\n      return getNextActiveElement(this._items, activeElement, isNext, this._config.wrap);\n    }\n\n    _triggerSlideEvent(relatedTarget, eventDirectionName) {\n      const targetIndex = this._getItemIndex(relatedTarget);\n\n      const fromIndex = this._getItemIndex(SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element));\n\n      return EventHandler.trigger(this._element, EVENT_SLIDE, {\n        relatedTarget,\n        direction: eventDirectionName,\n        from: fromIndex,\n        to: targetIndex\n      });\n    }\n\n    _setActiveIndicatorElement(element) {\n      if (this._indicatorsElement) {\n        const activeIndicator = SelectorEngine.findOne(SELECTOR_ACTIVE$1, this._indicatorsElement);\n        activeIndicator.classList.remove(CLASS_NAME_ACTIVE$2);\n        activeIndicator.removeAttribute('aria-current');\n        const indicators = SelectorEngine.find(SELECTOR_INDICATOR, this._indicatorsElement);\n\n        for (let i = 0; i < indicators.length; i++) {\n          if (Number.parseInt(indicators[i].getAttribute('data-bs-slide-to'), 10) === this._getItemIndex(element)) {\n            indicators[i].classList.add(CLASS_NAME_ACTIVE$2);\n            indicators[i].setAttribute('aria-current', 'true');\n            break;\n          }\n        }\n      }\n    }\n\n    _updateInterval() {\n      const element = this._activeElement || SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);\n\n      if (!element) {\n        return;\n      }\n\n      const elementInterval = Number.parseInt(element.getAttribute('data-bs-interval'), 10);\n\n      if (elementInterval) {\n        this._config.defaultInterval = this._config.defaultInterval || this._config.interval;\n        this._config.interval = elementInterval;\n      } else {\n        this._config.interval = this._config.defaultInterval || this._config.interval;\n      }\n    }\n\n    _slide(directionOrOrder, element) {\n      const order = this._directionToOrder(directionOrOrder);\n\n      const activeElement = SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);\n\n      const activeElementIndex = this._getItemIndex(activeElement);\n\n      const nextElement = element || this._getItemByOrder(order, activeElement);\n\n      const nextElementIndex = this._getItemIndex(nextElement);\n\n      const isCycling = Boolean(this._interval);\n      const isNext = order === ORDER_NEXT;\n      const directionalClassName = isNext ? CLASS_NAME_START : CLASS_NAME_END;\n      const orderClassName = isNext ? CLASS_NAME_NEXT : CLASS_NAME_PREV;\n\n      const eventDirectionName = this._orderToDirection(order);\n\n      if (nextElement && nextElement.classList.contains(CLASS_NAME_ACTIVE$2)) {\n        this._isSliding = false;\n        return;\n      }\n\n      if (this._isSliding) {\n        return;\n      }\n\n      const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName);\n\n      if (slideEvent.defaultPrevented) {\n        return;\n      }\n\n      if (!activeElement || !nextElement) {\n        // Some weirdness is happening, so we bail\n        return;\n      }\n\n      this._isSliding = true;\n\n      if (isCycling) {\n        this.pause();\n      }\n\n      this._setActiveIndicatorElement(nextElement);\n\n      this._activeElement = nextElement;\n\n      const triggerSlidEvent = () => {\n        EventHandler.trigger(this._element, EVENT_SLID, {\n          relatedTarget: nextElement,\n          direction: eventDirectionName,\n          from: activeElementIndex,\n          to: nextElementIndex\n        });\n      };\n\n      if (this._element.classList.contains(CLASS_NAME_SLIDE)) {\n        nextElement.classList.add(orderClassName);\n        reflow(nextElement);\n        activeElement.classList.add(directionalClassName);\n        nextElement.classList.add(directionalClassName);\n\n        const completeCallBack = () => {\n          nextElement.classList.remove(directionalClassName, orderClassName);\n          nextElement.classList.add(CLASS_NAME_ACTIVE$2);\n          activeElement.classList.remove(CLASS_NAME_ACTIVE$2, orderClassName, directionalClassName);\n          this._isSliding = false;\n          setTimeout(triggerSlidEvent, 0);\n        };\n\n        this._queueCallback(completeCallBack, activeElement, true);\n      } else {\n        activeElement.classList.remove(CLASS_NAME_ACTIVE$2);\n        nextElement.classList.add(CLASS_NAME_ACTIVE$2);\n        this._isSliding = false;\n        triggerSlidEvent();\n      }\n\n      if (isCycling) {\n        this.cycle();\n      }\n    }\n\n    _directionToOrder(direction) {\n      if (![DIRECTION_RIGHT, DIRECTION_LEFT].includes(direction)) {\n        return direction;\n      }\n\n      if (isRTL()) {\n        return direction === DIRECTION_LEFT ? ORDER_PREV : ORDER_NEXT;\n      }\n\n      return direction === DIRECTION_LEFT ? ORDER_NEXT : ORDER_PREV;\n    }\n\n    _orderToDirection(order) {\n      if (![ORDER_NEXT, ORDER_PREV].includes(order)) {\n        return order;\n      }\n\n      if (isRTL()) {\n        return order === ORDER_PREV ? DIRECTION_LEFT : DIRECTION_RIGHT;\n      }\n\n      return order === ORDER_PREV ? DIRECTION_RIGHT : DIRECTION_LEFT;\n    } // Static\n\n\n    static carouselInterface(element, config) {\n      const data = Carousel.getOrCreateInstance(element, config);\n      let {\n        _config\n      } = data;\n\n      if (typeof config === 'object') {\n        _config = { ..._config,\n          ...config\n        };\n      }\n\n      const action = typeof config === 'string' ? config : _config.slide;\n\n      if (typeof config === 'number') {\n        data.to(config);\n      } else if (typeof action === 'string') {\n        if (typeof data[action] === 'undefined') {\n          throw new TypeError(`No method named \"${action}\"`);\n        }\n\n        data[action]();\n      } else if (_config.interval && _config.ride) {\n        data.pause();\n        data.cycle();\n      }\n    }\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        Carousel.carouselInterface(this, config);\n      });\n    }\n\n    static dataApiClickHandler(event) {\n      const target = getElementFromSelector(this);\n\n      if (!target || !target.classList.contains(CLASS_NAME_CAROUSEL)) {\n        return;\n      }\n\n      const config = { ...Manipulator.getDataAttributes(target),\n        ...Manipulator.getDataAttributes(this)\n      };\n      const slideIndex = this.getAttribute('data-bs-slide-to');\n\n      if (slideIndex) {\n        config.interval = false;\n      }\n\n      Carousel.carouselInterface(target, config);\n\n      if (slideIndex) {\n        Carousel.getInstance(target).to(slideIndex);\n      }\n\n      event.preventDefault();\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_CLICK_DATA_API$5, SELECTOR_DATA_SLIDE, Carousel.dataApiClickHandler);\n  EventHandler.on(window, EVENT_LOAD_DATA_API$2, () => {\n    const carousels = SelectorEngine.find(SELECTOR_DATA_RIDE);\n\n    for (let i = 0, len = carousels.length; i < len; i++) {\n      Carousel.carouselInterface(carousels[i], Carousel.getInstance(carousels[i]));\n    }\n  });\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Carousel to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Carousel);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): collapse.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$a = 'collapse';\n  const DATA_KEY$9 = 'bs.collapse';\n  const EVENT_KEY$9 = `.${DATA_KEY$9}`;\n  const DATA_API_KEY$5 = '.data-api';\n  const Default$9 = {\n    toggle: true,\n    parent: null\n  };\n  const DefaultType$9 = {\n    toggle: 'boolean',\n    parent: '(null|element)'\n  };\n  const EVENT_SHOW$5 = `show${EVENT_KEY$9}`;\n  const EVENT_SHOWN$5 = `shown${EVENT_KEY$9}`;\n  const EVENT_HIDE$5 = `hide${EVENT_KEY$9}`;\n  const EVENT_HIDDEN$5 = `hidden${EVENT_KEY$9}`;\n  const EVENT_CLICK_DATA_API$4 = `click${EVENT_KEY$9}${DATA_API_KEY$5}`;\n  const CLASS_NAME_SHOW$7 = 'show';\n  const CLASS_NAME_COLLAPSE = 'collapse';\n  const CLASS_NAME_COLLAPSING = 'collapsing';\n  const CLASS_NAME_COLLAPSED = 'collapsed';\n  const CLASS_NAME_DEEPER_CHILDREN = `:scope .${CLASS_NAME_COLLAPSE} .${CLASS_NAME_COLLAPSE}`;\n  const CLASS_NAME_HORIZONTAL = 'collapse-horizontal';\n  const WIDTH = 'width';\n  const HEIGHT = 'height';\n  const SELECTOR_ACTIVES = '.collapse.show, .collapse.collapsing';\n  const SELECTOR_DATA_TOGGLE$4 = '[data-bs-toggle=\"collapse\"]';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Collapse extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._isTransitioning = false;\n      this._config = this._getConfig(config);\n      this._triggerArray = [];\n      const toggleList = SelectorEngine.find(SELECTOR_DATA_TOGGLE$4);\n\n      for (let i = 0, len = toggleList.length; i < len; i++) {\n        const elem = toggleList[i];\n        const selector = getSelectorFromElement(elem);\n        const filterElement = SelectorEngine.find(selector).filter(foundElem => foundElem === this._element);\n\n        if (selector !== null && filterElement.length) {\n          this._selector = selector;\n\n          this._triggerArray.push(elem);\n        }\n      }\n\n      this._initializeChildren();\n\n      if (!this._config.parent) {\n        this._addAriaAndCollapsedClass(this._triggerArray, this._isShown());\n      }\n\n      if (this._config.toggle) {\n        this.toggle();\n      }\n    } // Getters\n\n\n    static get Default() {\n      return Default$9;\n    }\n\n    static get NAME() {\n      return NAME$a;\n    } // Public\n\n\n    toggle() {\n      if (this._isShown()) {\n        this.hide();\n      } else {\n        this.show();\n      }\n    }\n\n    show() {\n      if (this._isTransitioning || this._isShown()) {\n        return;\n      }\n\n      let actives = [];\n      let activesData;\n\n      if (this._config.parent) {\n        const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent);\n        actives = SelectorEngine.find(SELECTOR_ACTIVES, this._config.parent).filter(elem => !children.includes(elem)); // remove children if greater depth\n      }\n\n      const container = SelectorEngine.findOne(this._selector);\n\n      if (actives.length) {\n        const tempActiveData = actives.find(elem => container !== elem);\n        activesData = tempActiveData ? Collapse.getInstance(tempActiveData) : null;\n\n        if (activesData && activesData._isTransitioning) {\n          return;\n        }\n      }\n\n      const startEvent = EventHandler.trigger(this._element, EVENT_SHOW$5);\n\n      if (startEvent.defaultPrevented) {\n        return;\n      }\n\n      actives.forEach(elemActive => {\n        if (container !== elemActive) {\n          Collapse.getOrCreateInstance(elemActive, {\n            toggle: false\n          }).hide();\n        }\n\n        if (!activesData) {\n          Data.set(elemActive, DATA_KEY$9, null);\n        }\n      });\n\n      const dimension = this._getDimension();\n\n      this._element.classList.remove(CLASS_NAME_COLLAPSE);\n\n      this._element.classList.add(CLASS_NAME_COLLAPSING);\n\n      this._element.style[dimension] = 0;\n\n      this._addAriaAndCollapsedClass(this._triggerArray, true);\n\n      this._isTransitioning = true;\n\n      const complete = () => {\n        this._isTransitioning = false;\n\n        this._element.classList.remove(CLASS_NAME_COLLAPSING);\n\n        this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW$7);\n\n        this._element.style[dimension] = '';\n        EventHandler.trigger(this._element, EVENT_SHOWN$5);\n      };\n\n      const capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1);\n      const scrollSize = `scroll${capitalizedDimension}`;\n\n      this._queueCallback(complete, this._element, true);\n\n      this._element.style[dimension] = `${this._element[scrollSize]}px`;\n    }\n\n    hide() {\n      if (this._isTransitioning || !this._isShown()) {\n        return;\n      }\n\n      const startEvent = EventHandler.trigger(this._element, EVENT_HIDE$5);\n\n      if (startEvent.defaultPrevented) {\n        return;\n      }\n\n      const dimension = this._getDimension();\n\n      this._element.style[dimension] = `${this._element.getBoundingClientRect()[dimension]}px`;\n      reflow(this._element);\n\n      this._element.classList.add(CLASS_NAME_COLLAPSING);\n\n      this._element.classList.remove(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW$7);\n\n      const triggerArrayLength = this._triggerArray.length;\n\n      for (let i = 0; i < triggerArrayLength; i++) {\n        const trigger = this._triggerArray[i];\n        const elem = getElementFromSelector(trigger);\n\n        if (elem && !this._isShown(elem)) {\n          this._addAriaAndCollapsedClass([trigger], false);\n        }\n      }\n\n      this._isTransitioning = true;\n\n      const complete = () => {\n        this._isTransitioning = false;\n\n        this._element.classList.remove(CLASS_NAME_COLLAPSING);\n\n        this._element.classList.add(CLASS_NAME_COLLAPSE);\n\n        EventHandler.trigger(this._element, EVENT_HIDDEN$5);\n      };\n\n      this._element.style[dimension] = '';\n\n      this._queueCallback(complete, this._element, true);\n    }\n\n    _isShown(element = this._element) {\n      return element.classList.contains(CLASS_NAME_SHOW$7);\n    } // Private\n\n\n    _getConfig(config) {\n      config = { ...Default$9,\n        ...Manipulator.getDataAttributes(this._element),\n        ...config\n      };\n      config.toggle = Boolean(config.toggle); // Coerce string values\n\n      config.parent = getElement(config.parent);\n      typeCheckConfig(NAME$a, config, DefaultType$9);\n      return config;\n    }\n\n    _getDimension() {\n      return this._element.classList.contains(CLASS_NAME_HORIZONTAL) ? WIDTH : HEIGHT;\n    }\n\n    _initializeChildren() {\n      if (!this._config.parent) {\n        return;\n      }\n\n      const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent);\n      SelectorEngine.find(SELECTOR_DATA_TOGGLE$4, this._config.parent).filter(elem => !children.includes(elem)).forEach(element => {\n        const selected = getElementFromSelector(element);\n\n        if (selected) {\n          this._addAriaAndCollapsedClass([element], this._isShown(selected));\n        }\n      });\n    }\n\n    _addAriaAndCollapsedClass(triggerArray, isOpen) {\n      if (!triggerArray.length) {\n        return;\n      }\n\n      triggerArray.forEach(elem => {\n        if (isOpen) {\n          elem.classList.remove(CLASS_NAME_COLLAPSED);\n        } else {\n          elem.classList.add(CLASS_NAME_COLLAPSED);\n        }\n\n        elem.setAttribute('aria-expanded', isOpen);\n      });\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const _config = {};\n\n        if (typeof config === 'string' && /show|hide/.test(config)) {\n          _config.toggle = false;\n        }\n\n        const data = Collapse.getOrCreateInstance(this, _config);\n\n        if (typeof config === 'string') {\n          if (typeof data[config] === 'undefined') {\n            throw new TypeError(`No method named \"${config}\"`);\n          }\n\n          data[config]();\n        }\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_CLICK_DATA_API$4, SELECTOR_DATA_TOGGLE$4, function (event) {\n    // preventDefault only for <a> elements (which change the URL) not inside the collapsible element\n    if (event.target.tagName === 'A' || event.delegateTarget && event.delegateTarget.tagName === 'A') {\n      event.preventDefault();\n    }\n\n    const selector = getSelectorFromElement(this);\n    const selectorElements = SelectorEngine.find(selector);\n    selectorElements.forEach(element => {\n      Collapse.getOrCreateInstance(element, {\n        toggle: false\n      }).toggle();\n    });\n  });\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Collapse to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Collapse);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): dropdown.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$9 = 'dropdown';\n  const DATA_KEY$8 = 'bs.dropdown';\n  const EVENT_KEY$8 = `.${DATA_KEY$8}`;\n  const DATA_API_KEY$4 = '.data-api';\n  const ESCAPE_KEY$2 = 'Escape';\n  const SPACE_KEY = 'Space';\n  const TAB_KEY$1 = 'Tab';\n  const ARROW_UP_KEY = 'ArrowUp';\n  const ARROW_DOWN_KEY = 'ArrowDown';\n  const RIGHT_MOUSE_BUTTON = 2; // MouseEvent.button value for the secondary button, usually the right button\n\n  const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEY}|${ARROW_DOWN_KEY}|${ESCAPE_KEY$2}`);\n  const EVENT_HIDE$4 = `hide${EVENT_KEY$8}`;\n  const EVENT_HIDDEN$4 = `hidden${EVENT_KEY$8}`;\n  const EVENT_SHOW$4 = `show${EVENT_KEY$8}`;\n  const EVENT_SHOWN$4 = `shown${EVENT_KEY$8}`;\n  const EVENT_CLICK_DATA_API$3 = `click${EVENT_KEY$8}${DATA_API_KEY$4}`;\n  const EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY$8}${DATA_API_KEY$4}`;\n  const EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY$8}${DATA_API_KEY$4}`;\n  const CLASS_NAME_SHOW$6 = 'show';\n  const CLASS_NAME_DROPUP = 'dropup';\n  const CLASS_NAME_DROPEND = 'dropend';\n  const CLASS_NAME_DROPSTART = 'dropstart';\n  const CLASS_NAME_NAVBAR = 'navbar';\n  const SELECTOR_DATA_TOGGLE$3 = '[data-bs-toggle=\"dropdown\"]';\n  const SELECTOR_MENU = '.dropdown-menu';\n  const SELECTOR_NAVBAR_NAV = '.navbar-nav';\n  const SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)';\n  const PLACEMENT_TOP = isRTL() ? 'top-end' : 'top-start';\n  const PLACEMENT_TOPEND = isRTL() ? 'top-start' : 'top-end';\n  const PLACEMENT_BOTTOM = isRTL() ? 'bottom-end' : 'bottom-start';\n  const PLACEMENT_BOTTOMEND = isRTL() ? 'bottom-start' : 'bottom-end';\n  const PLACEMENT_RIGHT = isRTL() ? 'left-start' : 'right-start';\n  const PLACEMENT_LEFT = isRTL() ? 'right-start' : 'left-start';\n  const Default$8 = {\n    offset: [0, 2],\n    boundary: 'clippingParents',\n    reference: 'toggle',\n    display: 'dynamic',\n    popperConfig: null,\n    autoClose: true\n  };\n  const DefaultType$8 = {\n    offset: '(array|string|function)',\n    boundary: '(string|element)',\n    reference: '(string|element|object)',\n    display: 'string',\n    popperConfig: '(null|object|function)',\n    autoClose: '(boolean|string)'\n  };\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Dropdown extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._popper = null;\n      this._config = this._getConfig(config);\n      this._menu = this._getMenuElement();\n      this._inNavbar = this._detectNavbar();\n    } // Getters\n\n\n    static get Default() {\n      return Default$8;\n    }\n\n    static get DefaultType() {\n      return DefaultType$8;\n    }\n\n    static get NAME() {\n      return NAME$9;\n    } // Public\n\n\n    toggle() {\n      return this._isShown() ? this.hide() : this.show();\n    }\n\n    show() {\n      if (isDisabled(this._element) || this._isShown(this._menu)) {\n        return;\n      }\n\n      const relatedTarget = {\n        relatedTarget: this._element\n      };\n      const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$4, relatedTarget);\n\n      if (showEvent.defaultPrevented) {\n        return;\n      }\n\n      const parent = Dropdown.getParentFromElement(this._element); // Totally disable Popper for Dropdowns in Navbar\n\n      if (this._inNavbar) {\n        Manipulator.setDataAttribute(this._menu, 'popper', 'none');\n      } else {\n        this._createPopper(parent);\n      } // If this is a touch-enabled device we add extra\n      // empty mouseover listeners to the body's immediate children;\n      // only needed because of broken event delegation on iOS\n      // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n\n\n      if ('ontouchstart' in document.documentElement && !parent.closest(SELECTOR_NAVBAR_NAV)) {\n        [].concat(...document.body.children).forEach(elem => EventHandler.on(elem, 'mouseover', noop));\n      }\n\n      this._element.focus();\n\n      this._element.setAttribute('aria-expanded', true);\n\n      this._menu.classList.add(CLASS_NAME_SHOW$6);\n\n      this._element.classList.add(CLASS_NAME_SHOW$6);\n\n      EventHandler.trigger(this._element, EVENT_SHOWN$4, relatedTarget);\n    }\n\n    hide() {\n      if (isDisabled(this._element) || !this._isShown(this._menu)) {\n        return;\n      }\n\n      const relatedTarget = {\n        relatedTarget: this._element\n      };\n\n      this._completeHide(relatedTarget);\n    }\n\n    dispose() {\n      if (this._popper) {\n        this._popper.destroy();\n      }\n\n      super.dispose();\n    }\n\n    update() {\n      this._inNavbar = this._detectNavbar();\n\n      if (this._popper) {\n        this._popper.update();\n      }\n    } // Private\n\n\n    _completeHide(relatedTarget) {\n      const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE$4, relatedTarget);\n\n      if (hideEvent.defaultPrevented) {\n        return;\n      } // If this is a touch-enabled device we remove the extra\n      // empty mouseover listeners we added for iOS support\n\n\n      if ('ontouchstart' in document.documentElement) {\n        [].concat(...document.body.children).forEach(elem => EventHandler.off(elem, 'mouseover', noop));\n      }\n\n      if (this._popper) {\n        this._popper.destroy();\n      }\n\n      this._menu.classList.remove(CLASS_NAME_SHOW$6);\n\n      this._element.classList.remove(CLASS_NAME_SHOW$6);\n\n      this._element.setAttribute('aria-expanded', 'false');\n\n      Manipulator.removeDataAttribute(this._menu, 'popper');\n      EventHandler.trigger(this._element, EVENT_HIDDEN$4, relatedTarget);\n    }\n\n    _getConfig(config) {\n      config = { ...this.constructor.Default,\n        ...Manipulator.getDataAttributes(this._element),\n        ...config\n      };\n      typeCheckConfig(NAME$9, config, this.constructor.DefaultType);\n\n      if (typeof config.reference === 'object' && !isElement(config.reference) && typeof config.reference.getBoundingClientRect !== 'function') {\n        // Popper virtual elements require a getBoundingClientRect method\n        throw new TypeError(`${NAME$9.toUpperCase()}: Option \"reference\" provided type \"object\" without a required \"getBoundingClientRect\" method.`);\n      }\n\n      return config;\n    }\n\n    _createPopper(parent) {\n      if (typeof Popper__namespace === 'undefined') {\n        throw new TypeError('Bootstrap\\'s dropdowns require Popper (https://popper.js.org)');\n      }\n\n      let referenceElement = this._element;\n\n      if (this._config.reference === 'parent') {\n        referenceElement = parent;\n      } else if (isElement(this._config.reference)) {\n        referenceElement = getElement(this._config.reference);\n      } else if (typeof this._config.reference === 'object') {\n        referenceElement = this._config.reference;\n      }\n\n      const popperConfig = this._getPopperConfig();\n\n      const isDisplayStatic = popperConfig.modifiers.find(modifier => modifier.name === 'applyStyles' && modifier.enabled === false);\n      this._popper = Popper__namespace.createPopper(referenceElement, this._menu, popperConfig);\n\n      if (isDisplayStatic) {\n        Manipulator.setDataAttribute(this._menu, 'popper', 'static');\n      }\n    }\n\n    _isShown(element = this._element) {\n      return element.classList.contains(CLASS_NAME_SHOW$6);\n    }\n\n    _getMenuElement() {\n      return SelectorEngine.next(this._element, SELECTOR_MENU)[0];\n    }\n\n    _getPlacement() {\n      const parentDropdown = this._element.parentNode;\n\n      if (parentDropdown.classList.contains(CLASS_NAME_DROPEND)) {\n        return PLACEMENT_RIGHT;\n      }\n\n      if (parentDropdown.classList.contains(CLASS_NAME_DROPSTART)) {\n        return PLACEMENT_LEFT;\n      } // We need to trim the value because custom properties can also include spaces\n\n\n      const isEnd = getComputedStyle(this._menu).getPropertyValue('--bs-position').trim() === 'end';\n\n      if (parentDropdown.classList.contains(CLASS_NAME_DROPUP)) {\n        return isEnd ? PLACEMENT_TOPEND : PLACEMENT_TOP;\n      }\n\n      return isEnd ? PLACEMENT_BOTTOMEND : PLACEMENT_BOTTOM;\n    }\n\n    _detectNavbar() {\n      return this._element.closest(`.${CLASS_NAME_NAVBAR}`) !== null;\n    }\n\n    _getOffset() {\n      const {\n        offset\n      } = this._config;\n\n      if (typeof offset === 'string') {\n        return offset.split(',').map(val => Number.parseInt(val, 10));\n      }\n\n      if (typeof offset === 'function') {\n        return popperData => offset(popperData, this._element);\n      }\n\n      return offset;\n    }\n\n    _getPopperConfig() {\n      const defaultBsPopperConfig = {\n        placement: this._getPlacement(),\n        modifiers: [{\n          name: 'preventOverflow',\n          options: {\n            boundary: this._config.boundary\n          }\n        }, {\n          name: 'offset',\n          options: {\n            offset: this._getOffset()\n          }\n        }]\n      }; // Disable Popper if we have a static display\n\n      if (this._config.display === 'static') {\n        defaultBsPopperConfig.modifiers = [{\n          name: 'applyStyles',\n          enabled: false\n        }];\n      }\n\n      return { ...defaultBsPopperConfig,\n        ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)\n      };\n    }\n\n    _selectMenuItem({\n      key,\n      target\n    }) {\n      const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, this._menu).filter(isVisible);\n\n      if (!items.length) {\n        return;\n      } // if target isn't included in items (e.g. when expanding the dropdown)\n      // allow cycling to get the last item in case key equals ARROW_UP_KEY\n\n\n      getNextActiveElement(items, target, key === ARROW_DOWN_KEY, !items.includes(target)).focus();\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Dropdown.getOrCreateInstance(this, config);\n\n        if (typeof config !== 'string') {\n          return;\n        }\n\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config]();\n      });\n    }\n\n    static clearMenus(event) {\n      if (event && (event.button === RIGHT_MOUSE_BUTTON || event.type === 'keyup' && event.key !== TAB_KEY$1)) {\n        return;\n      }\n\n      const toggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE$3);\n\n      for (let i = 0, len = toggles.length; i < len; i++) {\n        const context = Dropdown.getInstance(toggles[i]);\n\n        if (!context || context._config.autoClose === false) {\n          continue;\n        }\n\n        if (!context._isShown()) {\n          continue;\n        }\n\n        const relatedTarget = {\n          relatedTarget: context._element\n        };\n\n        if (event) {\n          const composedPath = event.composedPath();\n          const isMenuTarget = composedPath.includes(context._menu);\n\n          if (composedPath.includes(context._element) || context._config.autoClose === 'inside' && !isMenuTarget || context._config.autoClose === 'outside' && isMenuTarget) {\n            continue;\n          } // Tab navigation through the dropdown menu or events from contained inputs shouldn't close the menu\n\n\n          if (context._menu.contains(event.target) && (event.type === 'keyup' && event.key === TAB_KEY$1 || /input|select|option|textarea|form/i.test(event.target.tagName))) {\n            continue;\n          }\n\n          if (event.type === 'click') {\n            relatedTarget.clickEvent = event;\n          }\n        }\n\n        context._completeHide(relatedTarget);\n      }\n    }\n\n    static getParentFromElement(element) {\n      return getElementFromSelector(element) || element.parentNode;\n    }\n\n    static dataApiKeydownHandler(event) {\n      // If not input/textarea:\n      //  - And not a key in REGEXP_KEYDOWN => not a dropdown command\n      // If input/textarea:\n      //  - If space key => not a dropdown command\n      //  - If key is other than escape\n      //    - If key is not up or down => not a dropdown command\n      //    - If trigger inside the menu => not a dropdown command\n      if (/input|textarea/i.test(event.target.tagName) ? event.key === SPACE_KEY || event.key !== ESCAPE_KEY$2 && (event.key !== ARROW_DOWN_KEY && event.key !== ARROW_UP_KEY || event.target.closest(SELECTOR_MENU)) : !REGEXP_KEYDOWN.test(event.key)) {\n        return;\n      }\n\n      const isActive = this.classList.contains(CLASS_NAME_SHOW$6);\n\n      if (!isActive && event.key === ESCAPE_KEY$2) {\n        return;\n      }\n\n      event.preventDefault();\n      event.stopPropagation();\n\n      if (isDisabled(this)) {\n        return;\n      }\n\n      const getToggleButton = this.matches(SELECTOR_DATA_TOGGLE$3) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE$3)[0];\n      const instance = Dropdown.getOrCreateInstance(getToggleButton);\n\n      if (event.key === ESCAPE_KEY$2) {\n        instance.hide();\n        return;\n      }\n\n      if (event.key === ARROW_UP_KEY || event.key === ARROW_DOWN_KEY) {\n        if (!isActive) {\n          instance.show();\n        }\n\n        instance._selectMenuItem(event);\n\n        return;\n      }\n\n      if (!isActive || event.key === SPACE_KEY) {\n        Dropdown.clearMenus();\n      }\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE$3, Dropdown.dataApiKeydownHandler);\n  EventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler);\n  EventHandler.on(document, EVENT_CLICK_DATA_API$3, Dropdown.clearMenus);\n  EventHandler.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus);\n  EventHandler.on(document, EVENT_CLICK_DATA_API$3, SELECTOR_DATA_TOGGLE$3, function (event) {\n    event.preventDefault();\n    Dropdown.getOrCreateInstance(this).toggle();\n  });\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Dropdown to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Dropdown);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): util/scrollBar.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const SELECTOR_FIXED_CONTENT = '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top';\n  const SELECTOR_STICKY_CONTENT = '.sticky-top';\n\n  class ScrollBarHelper {\n    constructor() {\n      this._element = document.body;\n    }\n\n    getWidth() {\n      // https://developer.mozilla.org/en-US/docs/Web/API/Window/innerWidth#usage_notes\n      const documentWidth = document.documentElement.clientWidth;\n      return Math.abs(window.innerWidth - documentWidth);\n    }\n\n    hide() {\n      const width = this.getWidth();\n\n      this._disableOverFlow(); // give padding to element to balance the hidden scrollbar width\n\n\n      this._setElementAttributes(this._element, 'paddingRight', calculatedValue => calculatedValue + width); // trick: We adjust positive paddingRight and negative marginRight to sticky-top elements to keep showing fullwidth\n\n\n      this._setElementAttributes(SELECTOR_FIXED_CONTENT, 'paddingRight', calculatedValue => calculatedValue + width);\n\n      this._setElementAttributes(SELECTOR_STICKY_CONTENT, 'marginRight', calculatedValue => calculatedValue - width);\n    }\n\n    _disableOverFlow() {\n      this._saveInitialAttribute(this._element, 'overflow');\n\n      this._element.style.overflow = 'hidden';\n    }\n\n    _setElementAttributes(selector, styleProp, callback) {\n      const scrollbarWidth = this.getWidth();\n\n      const manipulationCallBack = element => {\n        if (element !== this._element && window.innerWidth > element.clientWidth + scrollbarWidth) {\n          return;\n        }\n\n        this._saveInitialAttribute(element, styleProp);\n\n        const calculatedValue = window.getComputedStyle(element)[styleProp];\n        element.style[styleProp] = `${callback(Number.parseFloat(calculatedValue))}px`;\n      };\n\n      this._applyManipulationCallback(selector, manipulationCallBack);\n    }\n\n    reset() {\n      this._resetElementAttributes(this._element, 'overflow');\n\n      this._resetElementAttributes(this._element, 'paddingRight');\n\n      this._resetElementAttributes(SELECTOR_FIXED_CONTENT, 'paddingRight');\n\n      this._resetElementAttributes(SELECTOR_STICKY_CONTENT, 'marginRight');\n    }\n\n    _saveInitialAttribute(element, styleProp) {\n      const actualValue = element.style[styleProp];\n\n      if (actualValue) {\n        Manipulator.setDataAttribute(element, styleProp, actualValue);\n      }\n    }\n\n    _resetElementAttributes(selector, styleProp) {\n      const manipulationCallBack = element => {\n        const value = Manipulator.getDataAttribute(element, styleProp);\n\n        if (typeof value === 'undefined') {\n          element.style.removeProperty(styleProp);\n        } else {\n          Manipulator.removeDataAttribute(element, styleProp);\n          element.style[styleProp] = value;\n        }\n      };\n\n      this._applyManipulationCallback(selector, manipulationCallBack);\n    }\n\n    _applyManipulationCallback(selector, callBack) {\n      if (isElement(selector)) {\n        callBack(selector);\n      } else {\n        SelectorEngine.find(selector, this._element).forEach(callBack);\n      }\n    }\n\n    isOverflowing() {\n      return this.getWidth() > 0;\n    }\n\n  }\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): util/backdrop.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const Default$7 = {\n    className: 'modal-backdrop',\n    isVisible: true,\n    // if false, we use the backdrop helper without adding any element to the dom\n    isAnimated: false,\n    rootElement: 'body',\n    // give the choice to place backdrop under different elements\n    clickCallback: null\n  };\n  const DefaultType$7 = {\n    className: 'string',\n    isVisible: 'boolean',\n    isAnimated: 'boolean',\n    rootElement: '(element|string)',\n    clickCallback: '(function|null)'\n  };\n  const NAME$8 = 'backdrop';\n  const CLASS_NAME_FADE$4 = 'fade';\n  const CLASS_NAME_SHOW$5 = 'show';\n  const EVENT_MOUSEDOWN = `mousedown.bs.${NAME$8}`;\n\n  class Backdrop {\n    constructor(config) {\n      this._config = this._getConfig(config);\n      this._isAppended = false;\n      this._element = null;\n    }\n\n    show(callback) {\n      if (!this._config.isVisible) {\n        execute(callback);\n        return;\n      }\n\n      this._append();\n\n      if (this._config.isAnimated) {\n        reflow(this._getElement());\n      }\n\n      this._getElement().classList.add(CLASS_NAME_SHOW$5);\n\n      this._emulateAnimation(() => {\n        execute(callback);\n      });\n    }\n\n    hide(callback) {\n      if (!this._config.isVisible) {\n        execute(callback);\n        return;\n      }\n\n      this._getElement().classList.remove(CLASS_NAME_SHOW$5);\n\n      this._emulateAnimation(() => {\n        this.dispose();\n        execute(callback);\n      });\n    } // Private\n\n\n    _getElement() {\n      if (!this._element) {\n        const backdrop = document.createElement('div');\n        backdrop.className = this._config.className;\n\n        if (this._config.isAnimated) {\n          backdrop.classList.add(CLASS_NAME_FADE$4);\n        }\n\n        this._element = backdrop;\n      }\n\n      return this._element;\n    }\n\n    _getConfig(config) {\n      config = { ...Default$7,\n        ...(typeof config === 'object' ? config : {})\n      }; // use getElement() with the default \"body\" to get a fresh Element on each instantiation\n\n      config.rootElement = getElement(config.rootElement);\n      typeCheckConfig(NAME$8, config, DefaultType$7);\n      return config;\n    }\n\n    _append() {\n      if (this._isAppended) {\n        return;\n      }\n\n      this._config.rootElement.append(this._getElement());\n\n      EventHandler.on(this._getElement(), EVENT_MOUSEDOWN, () => {\n        execute(this._config.clickCallback);\n      });\n      this._isAppended = true;\n    }\n\n    dispose() {\n      if (!this._isAppended) {\n        return;\n      }\n\n      EventHandler.off(this._element, EVENT_MOUSEDOWN);\n\n      this._element.remove();\n\n      this._isAppended = false;\n    }\n\n    _emulateAnimation(callback) {\n      executeAfterTransition(callback, this._getElement(), this._config.isAnimated);\n    }\n\n  }\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): util/focustrap.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const Default$6 = {\n    trapElement: null,\n    // The element to trap focus inside of\n    autofocus: true\n  };\n  const DefaultType$6 = {\n    trapElement: 'element',\n    autofocus: 'boolean'\n  };\n  const NAME$7 = 'focustrap';\n  const DATA_KEY$7 = 'bs.focustrap';\n  const EVENT_KEY$7 = `.${DATA_KEY$7}`;\n  const EVENT_FOCUSIN$1 = `focusin${EVENT_KEY$7}`;\n  const EVENT_KEYDOWN_TAB = `keydown.tab${EVENT_KEY$7}`;\n  const TAB_KEY = 'Tab';\n  const TAB_NAV_FORWARD = 'forward';\n  const TAB_NAV_BACKWARD = 'backward';\n\n  class FocusTrap {\n    constructor(config) {\n      this._config = this._getConfig(config);\n      this._isActive = false;\n      this._lastTabNavDirection = null;\n    }\n\n    activate() {\n      const {\n        trapElement,\n        autofocus\n      } = this._config;\n\n      if (this._isActive) {\n        return;\n      }\n\n      if (autofocus) {\n        trapElement.focus();\n      }\n\n      EventHandler.off(document, EVENT_KEY$7); // guard against infinite focus loop\n\n      EventHandler.on(document, EVENT_FOCUSIN$1, event => this._handleFocusin(event));\n      EventHandler.on(document, EVENT_KEYDOWN_TAB, event => this._handleKeydown(event));\n      this._isActive = true;\n    }\n\n    deactivate() {\n      if (!this._isActive) {\n        return;\n      }\n\n      this._isActive = false;\n      EventHandler.off(document, EVENT_KEY$7);\n    } // Private\n\n\n    _handleFocusin(event) {\n      const {\n        target\n      } = event;\n      const {\n        trapElement\n      } = this._config;\n\n      if (target === document || target === trapElement || trapElement.contains(target)) {\n        return;\n      }\n\n      const elements = SelectorEngine.focusableChildren(trapElement);\n\n      if (elements.length === 0) {\n        trapElement.focus();\n      } else if (this._lastTabNavDirection === TAB_NAV_BACKWARD) {\n        elements[elements.length - 1].focus();\n      } else {\n        elements[0].focus();\n      }\n    }\n\n    _handleKeydown(event) {\n      if (event.key !== TAB_KEY) {\n        return;\n      }\n\n      this._lastTabNavDirection = event.shiftKey ? TAB_NAV_BACKWARD : TAB_NAV_FORWARD;\n    }\n\n    _getConfig(config) {\n      config = { ...Default$6,\n        ...(typeof config === 'object' ? config : {})\n      };\n      typeCheckConfig(NAME$7, config, DefaultType$6);\n      return config;\n    }\n\n  }\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): modal.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$6 = 'modal';\n  const DATA_KEY$6 = 'bs.modal';\n  const EVENT_KEY$6 = `.${DATA_KEY$6}`;\n  const DATA_API_KEY$3 = '.data-api';\n  const ESCAPE_KEY$1 = 'Escape';\n  const Default$5 = {\n    backdrop: true,\n    keyboard: true,\n    focus: true\n  };\n  const DefaultType$5 = {\n    backdrop: '(boolean|string)',\n    keyboard: 'boolean',\n    focus: 'boolean'\n  };\n  const EVENT_HIDE$3 = `hide${EVENT_KEY$6}`;\n  const EVENT_HIDE_PREVENTED = `hidePrevented${EVENT_KEY$6}`;\n  const EVENT_HIDDEN$3 = `hidden${EVENT_KEY$6}`;\n  const EVENT_SHOW$3 = `show${EVENT_KEY$6}`;\n  const EVENT_SHOWN$3 = `shown${EVENT_KEY$6}`;\n  const EVENT_RESIZE = `resize${EVENT_KEY$6}`;\n  const EVENT_CLICK_DISMISS = `click.dismiss${EVENT_KEY$6}`;\n  const EVENT_KEYDOWN_DISMISS$1 = `keydown.dismiss${EVENT_KEY$6}`;\n  const EVENT_MOUSEUP_DISMISS = `mouseup.dismiss${EVENT_KEY$6}`;\n  const EVENT_MOUSEDOWN_DISMISS = `mousedown.dismiss${EVENT_KEY$6}`;\n  const EVENT_CLICK_DATA_API$2 = `click${EVENT_KEY$6}${DATA_API_KEY$3}`;\n  const CLASS_NAME_OPEN = 'modal-open';\n  const CLASS_NAME_FADE$3 = 'fade';\n  const CLASS_NAME_SHOW$4 = 'show';\n  const CLASS_NAME_STATIC = 'modal-static';\n  const OPEN_SELECTOR$1 = '.modal.show';\n  const SELECTOR_DIALOG = '.modal-dialog';\n  const SELECTOR_MODAL_BODY = '.modal-body';\n  const SELECTOR_DATA_TOGGLE$2 = '[data-bs-toggle=\"modal\"]';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Modal extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._config = this._getConfig(config);\n      this._dialog = SelectorEngine.findOne(SELECTOR_DIALOG, this._element);\n      this._backdrop = this._initializeBackDrop();\n      this._focustrap = this._initializeFocusTrap();\n      this._isShown = false;\n      this._ignoreBackdropClick = false;\n      this._isTransitioning = false;\n      this._scrollBar = new ScrollBarHelper();\n    } // Getters\n\n\n    static get Default() {\n      return Default$5;\n    }\n\n    static get NAME() {\n      return NAME$6;\n    } // Public\n\n\n    toggle(relatedTarget) {\n      return this._isShown ? this.hide() : this.show(relatedTarget);\n    }\n\n    show(relatedTarget) {\n      if (this._isShown || this._isTransitioning) {\n        return;\n      }\n\n      const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$3, {\n        relatedTarget\n      });\n\n      if (showEvent.defaultPrevented) {\n        return;\n      }\n\n      this._isShown = true;\n\n      if (this._isAnimated()) {\n        this._isTransitioning = true;\n      }\n\n      this._scrollBar.hide();\n\n      document.body.classList.add(CLASS_NAME_OPEN);\n\n      this._adjustDialog();\n\n      this._setEscapeEvent();\n\n      this._setResizeEvent();\n\n      EventHandler.on(this._dialog, EVENT_MOUSEDOWN_DISMISS, () => {\n        EventHandler.one(this._element, EVENT_MOUSEUP_DISMISS, event => {\n          if (event.target === this._element) {\n            this._ignoreBackdropClick = true;\n          }\n        });\n      });\n\n      this._showBackdrop(() => this._showElement(relatedTarget));\n    }\n\n    hide() {\n      if (!this._isShown || this._isTransitioning) {\n        return;\n      }\n\n      const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE$3);\n\n      if (hideEvent.defaultPrevented) {\n        return;\n      }\n\n      this._isShown = false;\n\n      const isAnimated = this._isAnimated();\n\n      if (isAnimated) {\n        this._isTransitioning = true;\n      }\n\n      this._setEscapeEvent();\n\n      this._setResizeEvent();\n\n      this._focustrap.deactivate();\n\n      this._element.classList.remove(CLASS_NAME_SHOW$4);\n\n      EventHandler.off(this._element, EVENT_CLICK_DISMISS);\n      EventHandler.off(this._dialog, EVENT_MOUSEDOWN_DISMISS);\n\n      this._queueCallback(() => this._hideModal(), this._element, isAnimated);\n    }\n\n    dispose() {\n      [window, this._dialog].forEach(htmlElement => EventHandler.off(htmlElement, EVENT_KEY$6));\n\n      this._backdrop.dispose();\n\n      this._focustrap.deactivate();\n\n      super.dispose();\n    }\n\n    handleUpdate() {\n      this._adjustDialog();\n    } // Private\n\n\n    _initializeBackDrop() {\n      return new Backdrop({\n        isVisible: Boolean(this._config.backdrop),\n        // 'static' option will be translated to true, and booleans will keep their value\n        isAnimated: this._isAnimated()\n      });\n    }\n\n    _initializeFocusTrap() {\n      return new FocusTrap({\n        trapElement: this._element\n      });\n    }\n\n    _getConfig(config) {\n      config = { ...Default$5,\n        ...Manipulator.getDataAttributes(this._element),\n        ...(typeof config === 'object' ? config : {})\n      };\n      typeCheckConfig(NAME$6, config, DefaultType$5);\n      return config;\n    }\n\n    _showElement(relatedTarget) {\n      const isAnimated = this._isAnimated();\n\n      const modalBody = SelectorEngine.findOne(SELECTOR_MODAL_BODY, this._dialog);\n\n      if (!this._element.parentNode || this._element.parentNode.nodeType !== Node.ELEMENT_NODE) {\n        // Don't move modal's DOM position\n        document.body.append(this._element);\n      }\n\n      this._element.style.display = 'block';\n\n      this._element.removeAttribute('aria-hidden');\n\n      this._element.setAttribute('aria-modal', true);\n\n      this._element.setAttribute('role', 'dialog');\n\n      this._element.scrollTop = 0;\n\n      if (modalBody) {\n        modalBody.scrollTop = 0;\n      }\n\n      if (isAnimated) {\n        reflow(this._element);\n      }\n\n      this._element.classList.add(CLASS_NAME_SHOW$4);\n\n      const transitionComplete = () => {\n        if (this._config.focus) {\n          this._focustrap.activate();\n        }\n\n        this._isTransitioning = false;\n        EventHandler.trigger(this._element, EVENT_SHOWN$3, {\n          relatedTarget\n        });\n      };\n\n      this._queueCallback(transitionComplete, this._dialog, isAnimated);\n    }\n\n    _setEscapeEvent() {\n      if (this._isShown) {\n        EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS$1, event => {\n          if (this._config.keyboard && event.key === ESCAPE_KEY$1) {\n            event.preventDefault();\n            this.hide();\n          } else if (!this._config.keyboard && event.key === ESCAPE_KEY$1) {\n            this._triggerBackdropTransition();\n          }\n        });\n      } else {\n        EventHandler.off(this._element, EVENT_KEYDOWN_DISMISS$1);\n      }\n    }\n\n    _setResizeEvent() {\n      if (this._isShown) {\n        EventHandler.on(window, EVENT_RESIZE, () => this._adjustDialog());\n      } else {\n        EventHandler.off(window, EVENT_RESIZE);\n      }\n    }\n\n    _hideModal() {\n      this._element.style.display = 'none';\n\n      this._element.setAttribute('aria-hidden', true);\n\n      this._element.removeAttribute('aria-modal');\n\n      this._element.removeAttribute('role');\n\n      this._isTransitioning = false;\n\n      this._backdrop.hide(() => {\n        document.body.classList.remove(CLASS_NAME_OPEN);\n\n        this._resetAdjustments();\n\n        this._scrollBar.reset();\n\n        EventHandler.trigger(this._element, EVENT_HIDDEN$3);\n      });\n    }\n\n    _showBackdrop(callback) {\n      EventHandler.on(this._element, EVENT_CLICK_DISMISS, event => {\n        if (this._ignoreBackdropClick) {\n          this._ignoreBackdropClick = false;\n          return;\n        }\n\n        if (event.target !== event.currentTarget) {\n          return;\n        }\n\n        if (this._config.backdrop === true) {\n          this.hide();\n        } else if (this._config.backdrop === 'static') {\n          this._triggerBackdropTransition();\n        }\n      });\n\n      this._backdrop.show(callback);\n    }\n\n    _isAnimated() {\n      return this._element.classList.contains(CLASS_NAME_FADE$3);\n    }\n\n    _triggerBackdropTransition() {\n      const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED);\n\n      if (hideEvent.defaultPrevented) {\n        return;\n      }\n\n      const {\n        classList,\n        scrollHeight,\n        style\n      } = this._element;\n      const isModalOverflowing = scrollHeight > document.documentElement.clientHeight; // return if the following background transition hasn't yet completed\n\n      if (!isModalOverflowing && style.overflowY === 'hidden' || classList.contains(CLASS_NAME_STATIC)) {\n        return;\n      }\n\n      if (!isModalOverflowing) {\n        style.overflowY = 'hidden';\n      }\n\n      classList.add(CLASS_NAME_STATIC);\n\n      this._queueCallback(() => {\n        classList.remove(CLASS_NAME_STATIC);\n\n        if (!isModalOverflowing) {\n          this._queueCallback(() => {\n            style.overflowY = '';\n          }, this._dialog);\n        }\n      }, this._dialog);\n\n      this._element.focus();\n    } // ----------------------------------------------------------------------\n    // the following methods are used to handle overflowing modals\n    // ----------------------------------------------------------------------\n\n\n    _adjustDialog() {\n      const isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;\n\n      const scrollbarWidth = this._scrollBar.getWidth();\n\n      const isBodyOverflowing = scrollbarWidth > 0;\n\n      if (!isBodyOverflowing && isModalOverflowing && !isRTL() || isBodyOverflowing && !isModalOverflowing && isRTL()) {\n        this._element.style.paddingLeft = `${scrollbarWidth}px`;\n      }\n\n      if (isBodyOverflowing && !isModalOverflowing && !isRTL() || !isBodyOverflowing && isModalOverflowing && isRTL()) {\n        this._element.style.paddingRight = `${scrollbarWidth}px`;\n      }\n    }\n\n    _resetAdjustments() {\n      this._element.style.paddingLeft = '';\n      this._element.style.paddingRight = '';\n    } // Static\n\n\n    static jQueryInterface(config, relatedTarget) {\n      return this.each(function () {\n        const data = Modal.getOrCreateInstance(this, config);\n\n        if (typeof config !== 'string') {\n          return;\n        }\n\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config](relatedTarget);\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_CLICK_DATA_API$2, SELECTOR_DATA_TOGGLE$2, function (event) {\n    const target = getElementFromSelector(this);\n\n    if (['A', 'AREA'].includes(this.tagName)) {\n      event.preventDefault();\n    }\n\n    EventHandler.one(target, EVENT_SHOW$3, showEvent => {\n      if (showEvent.defaultPrevented) {\n        // only register focus restorer if modal will actually get shown\n        return;\n      }\n\n      EventHandler.one(target, EVENT_HIDDEN$3, () => {\n        if (isVisible(this)) {\n          this.focus();\n        }\n      });\n    }); // avoid conflict when clicking moddal toggler while another one is open\n\n    const allReadyOpen = SelectorEngine.findOne(OPEN_SELECTOR$1);\n\n    if (allReadyOpen) {\n      Modal.getInstance(allReadyOpen).hide();\n    }\n\n    const data = Modal.getOrCreateInstance(target);\n    data.toggle(this);\n  });\n  enableDismissTrigger(Modal);\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Modal to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Modal);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): offcanvas.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$5 = 'offcanvas';\n  const DATA_KEY$5 = 'bs.offcanvas';\n  const EVENT_KEY$5 = `.${DATA_KEY$5}`;\n  const DATA_API_KEY$2 = '.data-api';\n  const EVENT_LOAD_DATA_API$1 = `load${EVENT_KEY$5}${DATA_API_KEY$2}`;\n  const ESCAPE_KEY = 'Escape';\n  const Default$4 = {\n    backdrop: true,\n    keyboard: true,\n    scroll: false\n  };\n  const DefaultType$4 = {\n    backdrop: 'boolean',\n    keyboard: 'boolean',\n    scroll: 'boolean'\n  };\n  const CLASS_NAME_SHOW$3 = 'show';\n  const CLASS_NAME_BACKDROP = 'offcanvas-backdrop';\n  const OPEN_SELECTOR = '.offcanvas.show';\n  const EVENT_SHOW$2 = `show${EVENT_KEY$5}`;\n  const EVENT_SHOWN$2 = `shown${EVENT_KEY$5}`;\n  const EVENT_HIDE$2 = `hide${EVENT_KEY$5}`;\n  const EVENT_HIDDEN$2 = `hidden${EVENT_KEY$5}`;\n  const EVENT_CLICK_DATA_API$1 = `click${EVENT_KEY$5}${DATA_API_KEY$2}`;\n  const EVENT_KEYDOWN_DISMISS = `keydown.dismiss${EVENT_KEY$5}`;\n  const SELECTOR_DATA_TOGGLE$1 = '[data-bs-toggle=\"offcanvas\"]';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Offcanvas extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._config = this._getConfig(config);\n      this._isShown = false;\n      this._backdrop = this._initializeBackDrop();\n      this._focustrap = this._initializeFocusTrap();\n\n      this._addEventListeners();\n    } // Getters\n\n\n    static get NAME() {\n      return NAME$5;\n    }\n\n    static get Default() {\n      return Default$4;\n    } // Public\n\n\n    toggle(relatedTarget) {\n      return this._isShown ? this.hide() : this.show(relatedTarget);\n    }\n\n    show(relatedTarget) {\n      if (this._isShown) {\n        return;\n      }\n\n      const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$2, {\n        relatedTarget\n      });\n\n      if (showEvent.defaultPrevented) {\n        return;\n      }\n\n      this._isShown = true;\n      this._element.style.visibility = 'visible';\n\n      this._backdrop.show();\n\n      if (!this._config.scroll) {\n        new ScrollBarHelper().hide();\n      }\n\n      this._element.removeAttribute('aria-hidden');\n\n      this._element.setAttribute('aria-modal', true);\n\n      this._element.setAttribute('role', 'dialog');\n\n      this._element.classList.add(CLASS_NAME_SHOW$3);\n\n      const completeCallBack = () => {\n        if (!this._config.scroll) {\n          this._focustrap.activate();\n        }\n\n        EventHandler.trigger(this._element, EVENT_SHOWN$2, {\n          relatedTarget\n        });\n      };\n\n      this._queueCallback(completeCallBack, this._element, true);\n    }\n\n    hide() {\n      if (!this._isShown) {\n        return;\n      }\n\n      const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE$2);\n\n      if (hideEvent.defaultPrevented) {\n        return;\n      }\n\n      this._focustrap.deactivate();\n\n      this._element.blur();\n\n      this._isShown = false;\n\n      this._element.classList.remove(CLASS_NAME_SHOW$3);\n\n      this._backdrop.hide();\n\n      const completeCallback = () => {\n        this._element.setAttribute('aria-hidden', true);\n\n        this._element.removeAttribute('aria-modal');\n\n        this._element.removeAttribute('role');\n\n        this._element.style.visibility = 'hidden';\n\n        if (!this._config.scroll) {\n          new ScrollBarHelper().reset();\n        }\n\n        EventHandler.trigger(this._element, EVENT_HIDDEN$2);\n      };\n\n      this._queueCallback(completeCallback, this._element, true);\n    }\n\n    dispose() {\n      this._backdrop.dispose();\n\n      this._focustrap.deactivate();\n\n      super.dispose();\n    } // Private\n\n\n    _getConfig(config) {\n      config = { ...Default$4,\n        ...Manipulator.getDataAttributes(this._element),\n        ...(typeof config === 'object' ? config : {})\n      };\n      typeCheckConfig(NAME$5, config, DefaultType$4);\n      return config;\n    }\n\n    _initializeBackDrop() {\n      return new Backdrop({\n        className: CLASS_NAME_BACKDROP,\n        isVisible: this._config.backdrop,\n        isAnimated: true,\n        rootElement: this._element.parentNode,\n        clickCallback: () => this.hide()\n      });\n    }\n\n    _initializeFocusTrap() {\n      return new FocusTrap({\n        trapElement: this._element\n      });\n    }\n\n    _addEventListeners() {\n      EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS, event => {\n        if (this._config.keyboard && event.key === ESCAPE_KEY) {\n          this.hide();\n        }\n      });\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Offcanvas.getOrCreateInstance(this, config);\n\n        if (typeof config !== 'string') {\n          return;\n        }\n\n        if (data[config] === undefined || config.startsWith('_') || config === 'constructor') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config](this);\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_CLICK_DATA_API$1, SELECTOR_DATA_TOGGLE$1, function (event) {\n    const target = getElementFromSelector(this);\n\n    if (['A', 'AREA'].includes(this.tagName)) {\n      event.preventDefault();\n    }\n\n    if (isDisabled(this)) {\n      return;\n    }\n\n    EventHandler.one(target, EVENT_HIDDEN$2, () => {\n      // focus on trigger when it is closed\n      if (isVisible(this)) {\n        this.focus();\n      }\n    }); // avoid conflict when clicking a toggler of an offcanvas, while another is open\n\n    const allReadyOpen = SelectorEngine.findOne(OPEN_SELECTOR);\n\n    if (allReadyOpen && allReadyOpen !== target) {\n      Offcanvas.getInstance(allReadyOpen).hide();\n    }\n\n    const data = Offcanvas.getOrCreateInstance(target);\n    data.toggle(this);\n  });\n  EventHandler.on(window, EVENT_LOAD_DATA_API$1, () => SelectorEngine.find(OPEN_SELECTOR).forEach(el => Offcanvas.getOrCreateInstance(el).show()));\n  enableDismissTrigger(Offcanvas);\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   */\n\n  defineJQueryPlugin(Offcanvas);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): util/sanitizer.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const uriAttributes = new Set(['background', 'cite', 'href', 'itemtype', 'longdesc', 'poster', 'src', 'xlink:href']);\n  const ARIA_ATTRIBUTE_PATTERN = /^aria-[\\w-]*$/i;\n  /**\n   * A pattern that recognizes a commonly useful subset of URLs that are safe.\n   *\n   * Shoutout to Angular https://github.com/angular/angular/blob/12.2.x/packages/core/src/sanitization/url_sanitizer.ts\n   */\n\n  const SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file|sms):|[^#&/:?]*(?:[#/?]|$))/i;\n  /**\n   * A pattern that matches safe data URLs. Only matches image, video and audio types.\n   *\n   * Shoutout to Angular https://github.com/angular/angular/blob/12.2.x/packages/core/src/sanitization/url_sanitizer.ts\n   */\n\n  const DATA_URL_PATTERN = /^data:(?:image\\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\\/(?:mpeg|mp4|ogg|webm)|audio\\/(?:mp3|oga|ogg|opus));base64,[\\d+/a-z]+=*$/i;\n\n  const allowedAttribute = (attribute, allowedAttributeList) => {\n    const attributeName = attribute.nodeName.toLowerCase();\n\n    if (allowedAttributeList.includes(attributeName)) {\n      if (uriAttributes.has(attributeName)) {\n        return Boolean(SAFE_URL_PATTERN.test(attribute.nodeValue) || DATA_URL_PATTERN.test(attribute.nodeValue));\n      }\n\n      return true;\n    }\n\n    const regExp = allowedAttributeList.filter(attributeRegex => attributeRegex instanceof RegExp); // Check if a regular expression validates the attribute.\n\n    for (let i = 0, len = regExp.length; i < len; i++) {\n      if (regExp[i].test(attributeName)) {\n        return true;\n      }\n    }\n\n    return false;\n  };\n\n  const DefaultAllowlist = {\n    // Global attributes allowed on any supplied element below.\n    '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],\n    a: ['target', 'href', 'title', 'rel'],\n    area: [],\n    b: [],\n    br: [],\n    col: [],\n    code: [],\n    div: [],\n    em: [],\n    hr: [],\n    h1: [],\n    h2: [],\n    h3: [],\n    h4: [],\n    h5: [],\n    h6: [],\n    i: [],\n    img: ['src', 'srcset', 'alt', 'title', 'width', 'height'],\n    li: [],\n    ol: [],\n    p: [],\n    pre: [],\n    s: [],\n    small: [],\n    span: [],\n    sub: [],\n    sup: [],\n    strong: [],\n    u: [],\n    ul: []\n  };\n  function sanitizeHtml(unsafeHtml, allowList, sanitizeFn) {\n    if (!unsafeHtml.length) {\n      return unsafeHtml;\n    }\n\n    if (sanitizeFn && typeof sanitizeFn === 'function') {\n      return sanitizeFn(unsafeHtml);\n    }\n\n    const domParser = new window.DOMParser();\n    const createdDocument = domParser.parseFromString(unsafeHtml, 'text/html');\n    const elements = [].concat(...createdDocument.body.querySelectorAll('*'));\n\n    for (let i = 0, len = elements.length; i < len; i++) {\n      const element = elements[i];\n      const elementName = element.nodeName.toLowerCase();\n\n      if (!Object.keys(allowList).includes(elementName)) {\n        element.remove();\n        continue;\n      }\n\n      const attributeList = [].concat(...element.attributes);\n      const allowedAttributes = [].concat(allowList['*'] || [], allowList[elementName] || []);\n      attributeList.forEach(attribute => {\n        if (!allowedAttribute(attribute, allowedAttributes)) {\n          element.removeAttribute(attribute.nodeName);\n        }\n      });\n    }\n\n    return createdDocument.body.innerHTML;\n  }\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): tooltip.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$4 = 'tooltip';\n  const DATA_KEY$4 = 'bs.tooltip';\n  const EVENT_KEY$4 = `.${DATA_KEY$4}`;\n  const CLASS_PREFIX$1 = 'bs-tooltip';\n  const DISALLOWED_ATTRIBUTES = new Set(['sanitize', 'allowList', 'sanitizeFn']);\n  const DefaultType$3 = {\n    animation: 'boolean',\n    template: 'string',\n    title: '(string|element|function)',\n    trigger: 'string',\n    delay: '(number|object)',\n    html: 'boolean',\n    selector: '(string|boolean)',\n    placement: '(string|function)',\n    offset: '(array|string|function)',\n    container: '(string|element|boolean)',\n    fallbackPlacements: 'array',\n    boundary: '(string|element)',\n    customClass: '(string|function)',\n    sanitize: 'boolean',\n    sanitizeFn: '(null|function)',\n    allowList: 'object',\n    popperConfig: '(null|object|function)'\n  };\n  const AttachmentMap = {\n    AUTO: 'auto',\n    TOP: 'top',\n    RIGHT: isRTL() ? 'left' : 'right',\n    BOTTOM: 'bottom',\n    LEFT: isRTL() ? 'right' : 'left'\n  };\n  const Default$3 = {\n    animation: true,\n    template: '<div class=\"tooltip\" role=\"tooltip\">' + '<div class=\"tooltip-arrow\"></div>' + '<div class=\"tooltip-inner\"></div>' + '</div>',\n    trigger: 'hover focus',\n    title: '',\n    delay: 0,\n    html: false,\n    selector: false,\n    placement: 'top',\n    offset: [0, 0],\n    container: false,\n    fallbackPlacements: ['top', 'right', 'bottom', 'left'],\n    boundary: 'clippingParents',\n    customClass: '',\n    sanitize: true,\n    sanitizeFn: null,\n    allowList: DefaultAllowlist,\n    popperConfig: null\n  };\n  const Event$2 = {\n    HIDE: `hide${EVENT_KEY$4}`,\n    HIDDEN: `hidden${EVENT_KEY$4}`,\n    SHOW: `show${EVENT_KEY$4}`,\n    SHOWN: `shown${EVENT_KEY$4}`,\n    INSERTED: `inserted${EVENT_KEY$4}`,\n    CLICK: `click${EVENT_KEY$4}`,\n    FOCUSIN: `focusin${EVENT_KEY$4}`,\n    FOCUSOUT: `focusout${EVENT_KEY$4}`,\n    MOUSEENTER: `mouseenter${EVENT_KEY$4}`,\n    MOUSELEAVE: `mouseleave${EVENT_KEY$4}`\n  };\n  const CLASS_NAME_FADE$2 = 'fade';\n  const CLASS_NAME_MODAL = 'modal';\n  const CLASS_NAME_SHOW$2 = 'show';\n  const HOVER_STATE_SHOW = 'show';\n  const HOVER_STATE_OUT = 'out';\n  const SELECTOR_TOOLTIP_INNER = '.tooltip-inner';\n  const SELECTOR_MODAL = `.${CLASS_NAME_MODAL}`;\n  const EVENT_MODAL_HIDE = 'hide.bs.modal';\n  const TRIGGER_HOVER = 'hover';\n  const TRIGGER_FOCUS = 'focus';\n  const TRIGGER_CLICK = 'click';\n  const TRIGGER_MANUAL = 'manual';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Tooltip extends BaseComponent {\n    constructor(element, config) {\n      if (typeof Popper__namespace === 'undefined') {\n        throw new TypeError('Bootstrap\\'s tooltips require Popper (https://popper.js.org)');\n      }\n\n      super(element); // private\n\n      this._isEnabled = true;\n      this._timeout = 0;\n      this._hoverState = '';\n      this._activeTrigger = {};\n      this._popper = null; // Protected\n\n      this._config = this._getConfig(config);\n      this.tip = null;\n\n      this._setListeners();\n    } // Getters\n\n\n    static get Default() {\n      return Default$3;\n    }\n\n    static get NAME() {\n      return NAME$4;\n    }\n\n    static get Event() {\n      return Event$2;\n    }\n\n    static get DefaultType() {\n      return DefaultType$3;\n    } // Public\n\n\n    enable() {\n      this._isEnabled = true;\n    }\n\n    disable() {\n      this._isEnabled = false;\n    }\n\n    toggleEnabled() {\n      this._isEnabled = !this._isEnabled;\n    }\n\n    toggle(event) {\n      if (!this._isEnabled) {\n        return;\n      }\n\n      if (event) {\n        const context = this._initializeOnDelegatedTarget(event);\n\n        context._activeTrigger.click = !context._activeTrigger.click;\n\n        if (context._isWithActiveTrigger()) {\n          context._enter(null, context);\n        } else {\n          context._leave(null, context);\n        }\n      } else {\n        if (this.getTipElement().classList.contains(CLASS_NAME_SHOW$2)) {\n          this._leave(null, this);\n\n          return;\n        }\n\n        this._enter(null, this);\n      }\n    }\n\n    dispose() {\n      clearTimeout(this._timeout);\n      EventHandler.off(this._element.closest(SELECTOR_MODAL), EVENT_MODAL_HIDE, this._hideModalHandler);\n\n      if (this.tip) {\n        this.tip.remove();\n      }\n\n      this._disposePopper();\n\n      super.dispose();\n    }\n\n    show() {\n      if (this._element.style.display === 'none') {\n        throw new Error('Please use show on visible elements');\n      }\n\n      if (!(this.isWithContent() && this._isEnabled)) {\n        return;\n      }\n\n      const showEvent = EventHandler.trigger(this._element, this.constructor.Event.SHOW);\n      const shadowRoot = findShadowRoot(this._element);\n      const isInTheDom = shadowRoot === null ? this._element.ownerDocument.documentElement.contains(this._element) : shadowRoot.contains(this._element);\n\n      if (showEvent.defaultPrevented || !isInTheDom) {\n        return;\n      } // A trick to recreate a tooltip in case a new title is given by using the NOT documented `data-bs-original-title`\n      // This will be removed later in favor of a `setContent` method\n\n\n      if (this.constructor.NAME === 'tooltip' && this.tip && this.getTitle() !== this.tip.querySelector(SELECTOR_TOOLTIP_INNER).innerHTML) {\n        this._disposePopper();\n\n        this.tip.remove();\n        this.tip = null;\n      }\n\n      const tip = this.getTipElement();\n      const tipId = getUID(this.constructor.NAME);\n      tip.setAttribute('id', tipId);\n\n      this._element.setAttribute('aria-describedby', tipId);\n\n      if (this._config.animation) {\n        tip.classList.add(CLASS_NAME_FADE$2);\n      }\n\n      const placement = typeof this._config.placement === 'function' ? this._config.placement.call(this, tip, this._element) : this._config.placement;\n\n      const attachment = this._getAttachment(placement);\n\n      this._addAttachmentClass(attachment);\n\n      const {\n        container\n      } = this._config;\n      Data.set(tip, this.constructor.DATA_KEY, this);\n\n      if (!this._element.ownerDocument.documentElement.contains(this.tip)) {\n        container.append(tip);\n        EventHandler.trigger(this._element, this.constructor.Event.INSERTED);\n      }\n\n      if (this._popper) {\n        this._popper.update();\n      } else {\n        this._popper = Popper__namespace.createPopper(this._element, tip, this._getPopperConfig(attachment));\n      }\n\n      tip.classList.add(CLASS_NAME_SHOW$2);\n\n      const customClass = this._resolvePossibleFunction(this._config.customClass);\n\n      if (customClass) {\n        tip.classList.add(...customClass.split(' '));\n      } // If this is a touch-enabled device we add extra\n      // empty mouseover listeners to the body's immediate children;\n      // only needed because of broken event delegation on iOS\n      // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n\n\n      if ('ontouchstart' in document.documentElement) {\n        [].concat(...document.body.children).forEach(element => {\n          EventHandler.on(element, 'mouseover', noop);\n        });\n      }\n\n      const complete = () => {\n        const prevHoverState = this._hoverState;\n        this._hoverState = null;\n        EventHandler.trigger(this._element, this.constructor.Event.SHOWN);\n\n        if (prevHoverState === HOVER_STATE_OUT) {\n          this._leave(null, this);\n        }\n      };\n\n      const isAnimated = this.tip.classList.contains(CLASS_NAME_FADE$2);\n\n      this._queueCallback(complete, this.tip, isAnimated);\n    }\n\n    hide() {\n      if (!this._popper) {\n        return;\n      }\n\n      const tip = this.getTipElement();\n\n      const complete = () => {\n        if (this._isWithActiveTrigger()) {\n          return;\n        }\n\n        if (this._hoverState !== HOVER_STATE_SHOW) {\n          tip.remove();\n        }\n\n        this._cleanTipClass();\n\n        this._element.removeAttribute('aria-describedby');\n\n        EventHandler.trigger(this._element, this.constructor.Event.HIDDEN);\n\n        this._disposePopper();\n      };\n\n      const hideEvent = EventHandler.trigger(this._element, this.constructor.Event.HIDE);\n\n      if (hideEvent.defaultPrevented) {\n        return;\n      }\n\n      tip.classList.remove(CLASS_NAME_SHOW$2); // If this is a touch-enabled device we remove the extra\n      // empty mouseover listeners we added for iOS support\n\n      if ('ontouchstart' in document.documentElement) {\n        [].concat(...document.body.children).forEach(element => EventHandler.off(element, 'mouseover', noop));\n      }\n\n      this._activeTrigger[TRIGGER_CLICK] = false;\n      this._activeTrigger[TRIGGER_FOCUS] = false;\n      this._activeTrigger[TRIGGER_HOVER] = false;\n      const isAnimated = this.tip.classList.contains(CLASS_NAME_FADE$2);\n\n      this._queueCallback(complete, this.tip, isAnimated);\n\n      this._hoverState = '';\n    }\n\n    update() {\n      if (this._popper !== null) {\n        this._popper.update();\n      }\n    } // Protected\n\n\n    isWithContent() {\n      return Boolean(this.getTitle());\n    }\n\n    getTipElement() {\n      if (this.tip) {\n        return this.tip;\n      }\n\n      const element = document.createElement('div');\n      element.innerHTML = this._config.template;\n      const tip = element.children[0];\n      this.setContent(tip);\n      tip.classList.remove(CLASS_NAME_FADE$2, CLASS_NAME_SHOW$2);\n      this.tip = tip;\n      return this.tip;\n    }\n\n    setContent(tip) {\n      this._sanitizeAndSetContent(tip, this.getTitle(), SELECTOR_TOOLTIP_INNER);\n    }\n\n    _sanitizeAndSetContent(template, content, selector) {\n      const templateElement = SelectorEngine.findOne(selector, template);\n\n      if (!content && templateElement) {\n        templateElement.remove();\n        return;\n      } // we use append for html objects to maintain js events\n\n\n      this.setElementContent(templateElement, content);\n    }\n\n    setElementContent(element, content) {\n      if (element === null) {\n        return;\n      }\n\n      if (isElement(content)) {\n        content = getElement(content); // content is a DOM node or a jQuery\n\n        if (this._config.html) {\n          if (content.parentNode !== element) {\n            element.innerHTML = '';\n            element.append(content);\n          }\n        } else {\n          element.textContent = content.textContent;\n        }\n\n        return;\n      }\n\n      if (this._config.html) {\n        if (this._config.sanitize) {\n          content = sanitizeHtml(content, this._config.allowList, this._config.sanitizeFn);\n        }\n\n        element.innerHTML = content;\n      } else {\n        element.textContent = content;\n      }\n    }\n\n    getTitle() {\n      const title = this._element.getAttribute('data-bs-original-title') || this._config.title;\n\n      return this._resolvePossibleFunction(title);\n    }\n\n    updateAttachment(attachment) {\n      if (attachment === 'right') {\n        return 'end';\n      }\n\n      if (attachment === 'left') {\n        return 'start';\n      }\n\n      return attachment;\n    } // Private\n\n\n    _initializeOnDelegatedTarget(event, context) {\n      return context || this.constructor.getOrCreateInstance(event.delegateTarget, this._getDelegateConfig());\n    }\n\n    _getOffset() {\n      const {\n        offset\n      } = this._config;\n\n      if (typeof offset === 'string') {\n        return offset.split(',').map(val => Number.parseInt(val, 10));\n      }\n\n      if (typeof offset === 'function') {\n        return popperData => offset(popperData, this._element);\n      }\n\n      return offset;\n    }\n\n    _resolvePossibleFunction(content) {\n      return typeof content === 'function' ? content.call(this._element) : content;\n    }\n\n    _getPopperConfig(attachment) {\n      const defaultBsPopperConfig = {\n        placement: attachment,\n        modifiers: [{\n          name: 'flip',\n          options: {\n            fallbackPlacements: this._config.fallbackPlacements\n          }\n        }, {\n          name: 'offset',\n          options: {\n            offset: this._getOffset()\n          }\n        }, {\n          name: 'preventOverflow',\n          options: {\n            boundary: this._config.boundary\n          }\n        }, {\n          name: 'arrow',\n          options: {\n            element: `.${this.constructor.NAME}-arrow`\n          }\n        }, {\n          name: 'onChange',\n          enabled: true,\n          phase: 'afterWrite',\n          fn: data => this._handlePopperPlacementChange(data)\n        }],\n        onFirstUpdate: data => {\n          if (data.options.placement !== data.placement) {\n            this._handlePopperPlacementChange(data);\n          }\n        }\n      };\n      return { ...defaultBsPopperConfig,\n        ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)\n      };\n    }\n\n    _addAttachmentClass(attachment) {\n      this.getTipElement().classList.add(`${this._getBasicClassPrefix()}-${this.updateAttachment(attachment)}`);\n    }\n\n    _getAttachment(placement) {\n      return AttachmentMap[placement.toUpperCase()];\n    }\n\n    _setListeners() {\n      const triggers = this._config.trigger.split(' ');\n\n      triggers.forEach(trigger => {\n        if (trigger === 'click') {\n          EventHandler.on(this._element, this.constructor.Event.CLICK, this._config.selector, event => this.toggle(event));\n        } else if (trigger !== TRIGGER_MANUAL) {\n          const eventIn = trigger === TRIGGER_HOVER ? this.constructor.Event.MOUSEENTER : this.constructor.Event.FOCUSIN;\n          const eventOut = trigger === TRIGGER_HOVER ? this.constructor.Event.MOUSELEAVE : this.constructor.Event.FOCUSOUT;\n          EventHandler.on(this._element, eventIn, this._config.selector, event => this._enter(event));\n          EventHandler.on(this._element, eventOut, this._config.selector, event => this._leave(event));\n        }\n      });\n\n      this._hideModalHandler = () => {\n        if (this._element) {\n          this.hide();\n        }\n      };\n\n      EventHandler.on(this._element.closest(SELECTOR_MODAL), EVENT_MODAL_HIDE, this._hideModalHandler);\n\n      if (this._config.selector) {\n        this._config = { ...this._config,\n          trigger: 'manual',\n          selector: ''\n        };\n      } else {\n        this._fixTitle();\n      }\n    }\n\n    _fixTitle() {\n      const title = this._element.getAttribute('title');\n\n      const originalTitleType = typeof this._element.getAttribute('data-bs-original-title');\n\n      if (title || originalTitleType !== 'string') {\n        this._element.setAttribute('data-bs-original-title', title || '');\n\n        if (title && !this._element.getAttribute('aria-label') && !this._element.textContent) {\n          this._element.setAttribute('aria-label', title);\n        }\n\n        this._element.setAttribute('title', '');\n      }\n    }\n\n    _enter(event, context) {\n      context = this._initializeOnDelegatedTarget(event, context);\n\n      if (event) {\n        context._activeTrigger[event.type === 'focusin' ? TRIGGER_FOCUS : TRIGGER_HOVER] = true;\n      }\n\n      if (context.getTipElement().classList.contains(CLASS_NAME_SHOW$2) || context._hoverState === HOVER_STATE_SHOW) {\n        context._hoverState = HOVER_STATE_SHOW;\n        return;\n      }\n\n      clearTimeout(context._timeout);\n      context._hoverState = HOVER_STATE_SHOW;\n\n      if (!context._config.delay || !context._config.delay.show) {\n        context.show();\n        return;\n      }\n\n      context._timeout = setTimeout(() => {\n        if (context._hoverState === HOVER_STATE_SHOW) {\n          context.show();\n        }\n      }, context._config.delay.show);\n    }\n\n    _leave(event, context) {\n      context = this._initializeOnDelegatedTarget(event, context);\n\n      if (event) {\n        context._activeTrigger[event.type === 'focusout' ? TRIGGER_FOCUS : TRIGGER_HOVER] = context._element.contains(event.relatedTarget);\n      }\n\n      if (context._isWithActiveTrigger()) {\n        return;\n      }\n\n      clearTimeout(context._timeout);\n      context._hoverState = HOVER_STATE_OUT;\n\n      if (!context._config.delay || !context._config.delay.hide) {\n        context.hide();\n        return;\n      }\n\n      context._timeout = setTimeout(() => {\n        if (context._hoverState === HOVER_STATE_OUT) {\n          context.hide();\n        }\n      }, context._config.delay.hide);\n    }\n\n    _isWithActiveTrigger() {\n      for (const trigger in this._activeTrigger) {\n        if (this._activeTrigger[trigger]) {\n          return true;\n        }\n      }\n\n      return false;\n    }\n\n    _getConfig(config) {\n      const dataAttributes = Manipulator.getDataAttributes(this._element);\n      Object.keys(dataAttributes).forEach(dataAttr => {\n        if (DISALLOWED_ATTRIBUTES.has(dataAttr)) {\n          delete dataAttributes[dataAttr];\n        }\n      });\n      config = { ...this.constructor.Default,\n        ...dataAttributes,\n        ...(typeof config === 'object' && config ? config : {})\n      };\n      config.container = config.container === false ? document.body : getElement(config.container);\n\n      if (typeof config.delay === 'number') {\n        config.delay = {\n          show: config.delay,\n          hide: config.delay\n        };\n      }\n\n      if (typeof config.title === 'number') {\n        config.title = config.title.toString();\n      }\n\n      if (typeof config.content === 'number') {\n        config.content = config.content.toString();\n      }\n\n      typeCheckConfig(NAME$4, config, this.constructor.DefaultType);\n\n      if (config.sanitize) {\n        config.template = sanitizeHtml(config.template, config.allowList, config.sanitizeFn);\n      }\n\n      return config;\n    }\n\n    _getDelegateConfig() {\n      const config = {};\n\n      for (const key in this._config) {\n        if (this.constructor.Default[key] !== this._config[key]) {\n          config[key] = this._config[key];\n        }\n      } // In the future can be replaced with:\n      // const keysWithDifferentValues = Object.entries(this._config).filter(entry => this.constructor.Default[entry[0]] !== this._config[entry[0]])\n      // `Object.fromEntries(keysWithDifferentValues)`\n\n\n      return config;\n    }\n\n    _cleanTipClass() {\n      const tip = this.getTipElement();\n      const basicClassPrefixRegex = new RegExp(`(^|\\\\s)${this._getBasicClassPrefix()}\\\\S+`, 'g');\n      const tabClass = tip.getAttribute('class').match(basicClassPrefixRegex);\n\n      if (tabClass !== null && tabClass.length > 0) {\n        tabClass.map(token => token.trim()).forEach(tClass => tip.classList.remove(tClass));\n      }\n    }\n\n    _getBasicClassPrefix() {\n      return CLASS_PREFIX$1;\n    }\n\n    _handlePopperPlacementChange(popperData) {\n      const {\n        state\n      } = popperData;\n\n      if (!state) {\n        return;\n      }\n\n      this.tip = state.elements.popper;\n\n      this._cleanTipClass();\n\n      this._addAttachmentClass(this._getAttachment(state.placement));\n    }\n\n    _disposePopper() {\n      if (this._popper) {\n        this._popper.destroy();\n\n        this._popper = null;\n      }\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Tooltip.getOrCreateInstance(this, config);\n\n        if (typeof config === 'string') {\n          if (typeof data[config] === 'undefined') {\n            throw new TypeError(`No method named \"${config}\"`);\n          }\n\n          data[config]();\n        }\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Tooltip to jQuery only if jQuery is present\n   */\n\n\n  defineJQueryPlugin(Tooltip);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): popover.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$3 = 'popover';\n  const DATA_KEY$3 = 'bs.popover';\n  const EVENT_KEY$3 = `.${DATA_KEY$3}`;\n  const CLASS_PREFIX = 'bs-popover';\n  const Default$2 = { ...Tooltip.Default,\n    placement: 'right',\n    offset: [0, 8],\n    trigger: 'click',\n    content: '',\n    template: '<div class=\"popover\" role=\"tooltip\">' + '<div class=\"popover-arrow\"></div>' + '<h3 class=\"popover-header\"></h3>' + '<div class=\"popover-body\"></div>' + '</div>'\n  };\n  const DefaultType$2 = { ...Tooltip.DefaultType,\n    content: '(string|element|function)'\n  };\n  const Event$1 = {\n    HIDE: `hide${EVENT_KEY$3}`,\n    HIDDEN: `hidden${EVENT_KEY$3}`,\n    SHOW: `show${EVENT_KEY$3}`,\n    SHOWN: `shown${EVENT_KEY$3}`,\n    INSERTED: `inserted${EVENT_KEY$3}`,\n    CLICK: `click${EVENT_KEY$3}`,\n    FOCUSIN: `focusin${EVENT_KEY$3}`,\n    FOCUSOUT: `focusout${EVENT_KEY$3}`,\n    MOUSEENTER: `mouseenter${EVENT_KEY$3}`,\n    MOUSELEAVE: `mouseleave${EVENT_KEY$3}`\n  };\n  const SELECTOR_TITLE = '.popover-header';\n  const SELECTOR_CONTENT = '.popover-body';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Popover extends Tooltip {\n    // Getters\n    static get Default() {\n      return Default$2;\n    }\n\n    static get NAME() {\n      return NAME$3;\n    }\n\n    static get Event() {\n      return Event$1;\n    }\n\n    static get DefaultType() {\n      return DefaultType$2;\n    } // Overrides\n\n\n    isWithContent() {\n      return this.getTitle() || this._getContent();\n    }\n\n    setContent(tip) {\n      this._sanitizeAndSetContent(tip, this.getTitle(), SELECTOR_TITLE);\n\n      this._sanitizeAndSetContent(tip, this._getContent(), SELECTOR_CONTENT);\n    } // Private\n\n\n    _getContent() {\n      return this._resolvePossibleFunction(this._config.content);\n    }\n\n    _getBasicClassPrefix() {\n      return CLASS_PREFIX;\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Popover.getOrCreateInstance(this, config);\n\n        if (typeof config === 'string') {\n          if (typeof data[config] === 'undefined') {\n            throw new TypeError(`No method named \"${config}\"`);\n          }\n\n          data[config]();\n        }\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Popover to jQuery only if jQuery is present\n   */\n\n\n  defineJQueryPlugin(Popover);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): scrollspy.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$2 = 'scrollspy';\n  const DATA_KEY$2 = 'bs.scrollspy';\n  const EVENT_KEY$2 = `.${DATA_KEY$2}`;\n  const DATA_API_KEY$1 = '.data-api';\n  const Default$1 = {\n    offset: 10,\n    method: 'auto',\n    target: ''\n  };\n  const DefaultType$1 = {\n    offset: 'number',\n    method: 'string',\n    target: '(string|element)'\n  };\n  const EVENT_ACTIVATE = `activate${EVENT_KEY$2}`;\n  const EVENT_SCROLL = `scroll${EVENT_KEY$2}`;\n  const EVENT_LOAD_DATA_API = `load${EVENT_KEY$2}${DATA_API_KEY$1}`;\n  const CLASS_NAME_DROPDOWN_ITEM = 'dropdown-item';\n  const CLASS_NAME_ACTIVE$1 = 'active';\n  const SELECTOR_DATA_SPY = '[data-bs-spy=\"scroll\"]';\n  const SELECTOR_NAV_LIST_GROUP$1 = '.nav, .list-group';\n  const SELECTOR_NAV_LINKS = '.nav-link';\n  const SELECTOR_NAV_ITEMS = '.nav-item';\n  const SELECTOR_LIST_ITEMS = '.list-group-item';\n  const SELECTOR_LINK_ITEMS = `${SELECTOR_NAV_LINKS}, ${SELECTOR_LIST_ITEMS}, .${CLASS_NAME_DROPDOWN_ITEM}`;\n  const SELECTOR_DROPDOWN$1 = '.dropdown';\n  const SELECTOR_DROPDOWN_TOGGLE$1 = '.dropdown-toggle';\n  const METHOD_OFFSET = 'offset';\n  const METHOD_POSITION = 'position';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class ScrollSpy extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._scrollElement = this._element.tagName === 'BODY' ? window : this._element;\n      this._config = this._getConfig(config);\n      this._offsets = [];\n      this._targets = [];\n      this._activeTarget = null;\n      this._scrollHeight = 0;\n      EventHandler.on(this._scrollElement, EVENT_SCROLL, () => this._process());\n      this.refresh();\n\n      this._process();\n    } // Getters\n\n\n    static get Default() {\n      return Default$1;\n    }\n\n    static get NAME() {\n      return NAME$2;\n    } // Public\n\n\n    refresh() {\n      const autoMethod = this._scrollElement === this._scrollElement.window ? METHOD_OFFSET : METHOD_POSITION;\n      const offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;\n      const offsetBase = offsetMethod === METHOD_POSITION ? this._getScrollTop() : 0;\n      this._offsets = [];\n      this._targets = [];\n      this._scrollHeight = this._getScrollHeight();\n      const targets = SelectorEngine.find(SELECTOR_LINK_ITEMS, this._config.target);\n      targets.map(element => {\n        const targetSelector = getSelectorFromElement(element);\n        const target = targetSelector ? SelectorEngine.findOne(targetSelector) : null;\n\n        if (target) {\n          const targetBCR = target.getBoundingClientRect();\n\n          if (targetBCR.width || targetBCR.height) {\n            return [Manipulator[offsetMethod](target).top + offsetBase, targetSelector];\n          }\n        }\n\n        return null;\n      }).filter(item => item).sort((a, b) => a[0] - b[0]).forEach(item => {\n        this._offsets.push(item[0]);\n\n        this._targets.push(item[1]);\n      });\n    }\n\n    dispose() {\n      EventHandler.off(this._scrollElement, EVENT_KEY$2);\n      super.dispose();\n    } // Private\n\n\n    _getConfig(config) {\n      config = { ...Default$1,\n        ...Manipulator.getDataAttributes(this._element),\n        ...(typeof config === 'object' && config ? config : {})\n      };\n      config.target = getElement(config.target) || document.documentElement;\n      typeCheckConfig(NAME$2, config, DefaultType$1);\n      return config;\n    }\n\n    _getScrollTop() {\n      return this._scrollElement === window ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop;\n    }\n\n    _getScrollHeight() {\n      return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);\n    }\n\n    _getOffsetHeight() {\n      return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;\n    }\n\n    _process() {\n      const scrollTop = this._getScrollTop() + this._config.offset;\n\n      const scrollHeight = this._getScrollHeight();\n\n      const maxScroll = this._config.offset + scrollHeight - this._getOffsetHeight();\n\n      if (this._scrollHeight !== scrollHeight) {\n        this.refresh();\n      }\n\n      if (scrollTop >= maxScroll) {\n        const target = this._targets[this._targets.length - 1];\n\n        if (this._activeTarget !== target) {\n          this._activate(target);\n        }\n\n        return;\n      }\n\n      if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {\n        this._activeTarget = null;\n\n        this._clear();\n\n        return;\n      }\n\n      for (let i = this._offsets.length; i--;) {\n        const isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (typeof this._offsets[i + 1] === 'undefined' || scrollTop < this._offsets[i + 1]);\n\n        if (isActiveTarget) {\n          this._activate(this._targets[i]);\n        }\n      }\n    }\n\n    _activate(target) {\n      this._activeTarget = target;\n\n      this._clear();\n\n      const queries = SELECTOR_LINK_ITEMS.split(',').map(selector => `${selector}[data-bs-target=\"${target}\"],${selector}[href=\"${target}\"]`);\n      const link = SelectorEngine.findOne(queries.join(','), this._config.target);\n      link.classList.add(CLASS_NAME_ACTIVE$1);\n\n      if (link.classList.contains(CLASS_NAME_DROPDOWN_ITEM)) {\n        SelectorEngine.findOne(SELECTOR_DROPDOWN_TOGGLE$1, link.closest(SELECTOR_DROPDOWN$1)).classList.add(CLASS_NAME_ACTIVE$1);\n      } else {\n        SelectorEngine.parents(link, SELECTOR_NAV_LIST_GROUP$1).forEach(listGroup => {\n          // Set triggered links parents as active\n          // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor\n          SelectorEngine.prev(listGroup, `${SELECTOR_NAV_LINKS}, ${SELECTOR_LIST_ITEMS}`).forEach(item => item.classList.add(CLASS_NAME_ACTIVE$1)); // Handle special case when .nav-link is inside .nav-item\n\n          SelectorEngine.prev(listGroup, SELECTOR_NAV_ITEMS).forEach(navItem => {\n            SelectorEngine.children(navItem, SELECTOR_NAV_LINKS).forEach(item => item.classList.add(CLASS_NAME_ACTIVE$1));\n          });\n        });\n      }\n\n      EventHandler.trigger(this._scrollElement, EVENT_ACTIVATE, {\n        relatedTarget: target\n      });\n    }\n\n    _clear() {\n      SelectorEngine.find(SELECTOR_LINK_ITEMS, this._config.target).filter(node => node.classList.contains(CLASS_NAME_ACTIVE$1)).forEach(node => node.classList.remove(CLASS_NAME_ACTIVE$1));\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = ScrollSpy.getOrCreateInstance(this, config);\n\n        if (typeof config !== 'string') {\n          return;\n        }\n\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config]();\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(window, EVENT_LOAD_DATA_API, () => {\n    SelectorEngine.find(SELECTOR_DATA_SPY).forEach(spy => new ScrollSpy(spy));\n  });\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .ScrollSpy to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(ScrollSpy);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): tab.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME$1 = 'tab';\n  const DATA_KEY$1 = 'bs.tab';\n  const EVENT_KEY$1 = `.${DATA_KEY$1}`;\n  const DATA_API_KEY = '.data-api';\n  const EVENT_HIDE$1 = `hide${EVENT_KEY$1}`;\n  const EVENT_HIDDEN$1 = `hidden${EVENT_KEY$1}`;\n  const EVENT_SHOW$1 = `show${EVENT_KEY$1}`;\n  const EVENT_SHOWN$1 = `shown${EVENT_KEY$1}`;\n  const EVENT_CLICK_DATA_API = `click${EVENT_KEY$1}${DATA_API_KEY}`;\n  const CLASS_NAME_DROPDOWN_MENU = 'dropdown-menu';\n  const CLASS_NAME_ACTIVE = 'active';\n  const CLASS_NAME_FADE$1 = 'fade';\n  const CLASS_NAME_SHOW$1 = 'show';\n  const SELECTOR_DROPDOWN = '.dropdown';\n  const SELECTOR_NAV_LIST_GROUP = '.nav, .list-group';\n  const SELECTOR_ACTIVE = '.active';\n  const SELECTOR_ACTIVE_UL = ':scope > li > .active';\n  const SELECTOR_DATA_TOGGLE = '[data-bs-toggle=\"tab\"], [data-bs-toggle=\"pill\"], [data-bs-toggle=\"list\"]';\n  const SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle';\n  const SELECTOR_DROPDOWN_ACTIVE_CHILD = ':scope > .dropdown-menu .active';\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Tab extends BaseComponent {\n    // Getters\n    static get NAME() {\n      return NAME$1;\n    } // Public\n\n\n    show() {\n      if (this._element.parentNode && this._element.parentNode.nodeType === Node.ELEMENT_NODE && this._element.classList.contains(CLASS_NAME_ACTIVE)) {\n        return;\n      }\n\n      let previous;\n      const target = getElementFromSelector(this._element);\n\n      const listElement = this._element.closest(SELECTOR_NAV_LIST_GROUP);\n\n      if (listElement) {\n        const itemSelector = listElement.nodeName === 'UL' || listElement.nodeName === 'OL' ? SELECTOR_ACTIVE_UL : SELECTOR_ACTIVE;\n        previous = SelectorEngine.find(itemSelector, listElement);\n        previous = previous[previous.length - 1];\n      }\n\n      const hideEvent = previous ? EventHandler.trigger(previous, EVENT_HIDE$1, {\n        relatedTarget: this._element\n      }) : null;\n      const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$1, {\n        relatedTarget: previous\n      });\n\n      if (showEvent.defaultPrevented || hideEvent !== null && hideEvent.defaultPrevented) {\n        return;\n      }\n\n      this._activate(this._element, listElement);\n\n      const complete = () => {\n        EventHandler.trigger(previous, EVENT_HIDDEN$1, {\n          relatedTarget: this._element\n        });\n        EventHandler.trigger(this._element, EVENT_SHOWN$1, {\n          relatedTarget: previous\n        });\n      };\n\n      if (target) {\n        this._activate(target, target.parentNode, complete);\n      } else {\n        complete();\n      }\n    } // Private\n\n\n    _activate(element, container, callback) {\n      const activeElements = container && (container.nodeName === 'UL' || container.nodeName === 'OL') ? SelectorEngine.find(SELECTOR_ACTIVE_UL, container) : SelectorEngine.children(container, SELECTOR_ACTIVE);\n      const active = activeElements[0];\n      const isTransitioning = callback && active && active.classList.contains(CLASS_NAME_FADE$1);\n\n      const complete = () => this._transitionComplete(element, active, callback);\n\n      if (active && isTransitioning) {\n        active.classList.remove(CLASS_NAME_SHOW$1);\n\n        this._queueCallback(complete, element, true);\n      } else {\n        complete();\n      }\n    }\n\n    _transitionComplete(element, active, callback) {\n      if (active) {\n        active.classList.remove(CLASS_NAME_ACTIVE);\n        const dropdownChild = SelectorEngine.findOne(SELECTOR_DROPDOWN_ACTIVE_CHILD, active.parentNode);\n\n        if (dropdownChild) {\n          dropdownChild.classList.remove(CLASS_NAME_ACTIVE);\n        }\n\n        if (active.getAttribute('role') === 'tab') {\n          active.setAttribute('aria-selected', false);\n        }\n      }\n\n      element.classList.add(CLASS_NAME_ACTIVE);\n\n      if (element.getAttribute('role') === 'tab') {\n        element.setAttribute('aria-selected', true);\n      }\n\n      reflow(element);\n\n      if (element.classList.contains(CLASS_NAME_FADE$1)) {\n        element.classList.add(CLASS_NAME_SHOW$1);\n      }\n\n      let parent = element.parentNode;\n\n      if (parent && parent.nodeName === 'LI') {\n        parent = parent.parentNode;\n      }\n\n      if (parent && parent.classList.contains(CLASS_NAME_DROPDOWN_MENU)) {\n        const dropdownElement = element.closest(SELECTOR_DROPDOWN);\n\n        if (dropdownElement) {\n          SelectorEngine.find(SELECTOR_DROPDOWN_TOGGLE, dropdownElement).forEach(dropdown => dropdown.classList.add(CLASS_NAME_ACTIVE));\n        }\n\n        element.setAttribute('aria-expanded', true);\n      }\n\n      if (callback) {\n        callback();\n      }\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Tab.getOrCreateInstance(this);\n\n        if (typeof config === 'string') {\n          if (typeof data[config] === 'undefined') {\n            throw new TypeError(`No method named \"${config}\"`);\n          }\n\n          data[config]();\n        }\n      });\n    }\n\n  }\n  /**\n   * ------------------------------------------------------------------------\n   * Data Api implementation\n   * ------------------------------------------------------------------------\n   */\n\n\n  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {\n    if (['A', 'AREA'].includes(this.tagName)) {\n      event.preventDefault();\n    }\n\n    if (isDisabled(this)) {\n      return;\n    }\n\n    const data = Tab.getOrCreateInstance(this);\n    data.show();\n  });\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Tab to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Tab);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): toast.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  /**\n   * ------------------------------------------------------------------------\n   * Constants\n   * ------------------------------------------------------------------------\n   */\n\n  const NAME = 'toast';\n  const DATA_KEY = 'bs.toast';\n  const EVENT_KEY = `.${DATA_KEY}`;\n  const EVENT_MOUSEOVER = `mouseover${EVENT_KEY}`;\n  const EVENT_MOUSEOUT = `mouseout${EVENT_KEY}`;\n  const EVENT_FOCUSIN = `focusin${EVENT_KEY}`;\n  const EVENT_FOCUSOUT = `focusout${EVENT_KEY}`;\n  const EVENT_HIDE = `hide${EVENT_KEY}`;\n  const EVENT_HIDDEN = `hidden${EVENT_KEY}`;\n  const EVENT_SHOW = `show${EVENT_KEY}`;\n  const EVENT_SHOWN = `shown${EVENT_KEY}`;\n  const CLASS_NAME_FADE = 'fade';\n  const CLASS_NAME_HIDE = 'hide'; // @deprecated - kept here only for backwards compatibility\n\n  const CLASS_NAME_SHOW = 'show';\n  const CLASS_NAME_SHOWING = 'showing';\n  const DefaultType = {\n    animation: 'boolean',\n    autohide: 'boolean',\n    delay: 'number'\n  };\n  const Default = {\n    animation: true,\n    autohide: true,\n    delay: 5000\n  };\n  /**\n   * ------------------------------------------------------------------------\n   * Class Definition\n   * ------------------------------------------------------------------------\n   */\n\n  class Toast extends BaseComponent {\n    constructor(element, config) {\n      super(element);\n      this._config = this._getConfig(config);\n      this._timeout = null;\n      this._hasMouseInteraction = false;\n      this._hasKeyboardInteraction = false;\n\n      this._setListeners();\n    } // Getters\n\n\n    static get DefaultType() {\n      return DefaultType;\n    }\n\n    static get Default() {\n      return Default;\n    }\n\n    static get NAME() {\n      return NAME;\n    } // Public\n\n\n    show() {\n      const showEvent = EventHandler.trigger(this._element, EVENT_SHOW);\n\n      if (showEvent.defaultPrevented) {\n        return;\n      }\n\n      this._clearTimeout();\n\n      if (this._config.animation) {\n        this._element.classList.add(CLASS_NAME_FADE);\n      }\n\n      const complete = () => {\n        this._element.classList.remove(CLASS_NAME_SHOWING);\n\n        EventHandler.trigger(this._element, EVENT_SHOWN);\n\n        this._maybeScheduleHide();\n      };\n\n      this._element.classList.remove(CLASS_NAME_HIDE); // @deprecated\n\n\n      reflow(this._element);\n\n      this._element.classList.add(CLASS_NAME_SHOW);\n\n      this._element.classList.add(CLASS_NAME_SHOWING);\n\n      this._queueCallback(complete, this._element, this._config.animation);\n    }\n\n    hide() {\n      if (!this._element.classList.contains(CLASS_NAME_SHOW)) {\n        return;\n      }\n\n      const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE);\n\n      if (hideEvent.defaultPrevented) {\n        return;\n      }\n\n      const complete = () => {\n        this._element.classList.add(CLASS_NAME_HIDE); // @deprecated\n\n\n        this._element.classList.remove(CLASS_NAME_SHOWING);\n\n        this._element.classList.remove(CLASS_NAME_SHOW);\n\n        EventHandler.trigger(this._element, EVENT_HIDDEN);\n      };\n\n      this._element.classList.add(CLASS_NAME_SHOWING);\n\n      this._queueCallback(complete, this._element, this._config.animation);\n    }\n\n    dispose() {\n      this._clearTimeout();\n\n      if (this._element.classList.contains(CLASS_NAME_SHOW)) {\n        this._element.classList.remove(CLASS_NAME_SHOW);\n      }\n\n      super.dispose();\n    } // Private\n\n\n    _getConfig(config) {\n      config = { ...Default,\n        ...Manipulator.getDataAttributes(this._element),\n        ...(typeof config === 'object' && config ? config : {})\n      };\n      typeCheckConfig(NAME, config, this.constructor.DefaultType);\n      return config;\n    }\n\n    _maybeScheduleHide() {\n      if (!this._config.autohide) {\n        return;\n      }\n\n      if (this._hasMouseInteraction || this._hasKeyboardInteraction) {\n        return;\n      }\n\n      this._timeout = setTimeout(() => {\n        this.hide();\n      }, this._config.delay);\n    }\n\n    _onInteraction(event, isInteracting) {\n      switch (event.type) {\n        case 'mouseover':\n        case 'mouseout':\n          this._hasMouseInteraction = isInteracting;\n          break;\n\n        case 'focusin':\n        case 'focusout':\n          this._hasKeyboardInteraction = isInteracting;\n          break;\n      }\n\n      if (isInteracting) {\n        this._clearTimeout();\n\n        return;\n      }\n\n      const nextElement = event.relatedTarget;\n\n      if (this._element === nextElement || this._element.contains(nextElement)) {\n        return;\n      }\n\n      this._maybeScheduleHide();\n    }\n\n    _setListeners() {\n      EventHandler.on(this._element, EVENT_MOUSEOVER, event => this._onInteraction(event, true));\n      EventHandler.on(this._element, EVENT_MOUSEOUT, event => this._onInteraction(event, false));\n      EventHandler.on(this._element, EVENT_FOCUSIN, event => this._onInteraction(event, true));\n      EventHandler.on(this._element, EVENT_FOCUSOUT, event => this._onInteraction(event, false));\n    }\n\n    _clearTimeout() {\n      clearTimeout(this._timeout);\n      this._timeout = null;\n    } // Static\n\n\n    static jQueryInterface(config) {\n      return this.each(function () {\n        const data = Toast.getOrCreateInstance(this, config);\n\n        if (typeof config === 'string') {\n          if (typeof data[config] === 'undefined') {\n            throw new TypeError(`No method named \"${config}\"`);\n          }\n\n          data[config](this);\n        }\n      });\n    }\n\n  }\n\n  enableDismissTrigger(Toast);\n  /**\n   * ------------------------------------------------------------------------\n   * jQuery\n   * ------------------------------------------------------------------------\n   * add .Toast to jQuery only if jQuery is present\n   */\n\n  defineJQueryPlugin(Toast);\n\n  /**\n   * --------------------------------------------------------------------------\n   * Bootstrap (v5.1.3): index.umd.js\n   * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n   * --------------------------------------------------------------------------\n   */\n  const index_umd = {\n    Alert,\n    Button,\n    Carousel,\n    Collapse,\n    Dropdown,\n    Modal,\n    Offcanvas,\n    Popover,\n    ScrollSpy,\n    Tab,\n    Toast,\n    Tooltip\n  };\n\n  return index_umd;\n\n}));\n//# sourceMappingURL=bootstrap.js.map\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n'use strict';\n\nmodule.exports = Writable;\n/* <replacement> */\n\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n} // It seems a linked list but it is not\n// there will be only 2 of these for each stream\n\n\nfunction CorkedRequest(state) {\n  var _this = this;\n\n  this.next = null;\n  this.entry = null;\n\n  this.finish = function () {\n    onCorkedFinish(_this, state);\n  };\n}\n/* </replacement> */\n\n/*<replacement>*/\n\n\nvar Duplex;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n/*<replacement>*/\n\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n/*<replacement>*/\n\nvar Stream = require('./internal/streams/stream');\n/*</replacement>*/\n\n\nvar Buffer = require('buffer').Buffer;\n\nvar OurUint8Array = global.Uint8Array || function () {};\n\nfunction _uint8ArrayToBuffer(chunk) {\n  return Buffer.from(chunk);\n}\n\nfunction _isUint8Array(obj) {\n  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n\nvar destroyImpl = require('./internal/streams/destroy');\n\nvar _require = require('./internal/streams/state'),\n    getHighWaterMark = _require.getHighWaterMark;\n\nvar _require$codes = require('../errors').codes,\n    ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,\n    ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,\n    ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,\n    ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,\n    ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,\n    ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,\n    ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,\n    ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;\n\nvar errorOrDestroy = destroyImpl.errorOrDestroy;\n\nrequire('inherits')(Writable, Stream);\n\nfunction nop() {}\n\nfunction WritableState(options, stream, isDuplex) {\n  Duplex = Duplex || require('./_stream_duplex');\n  options = options || {}; // Duplex streams are both readable and writable, but share\n  // the same options object.\n  // However, some cases require setting options to different\n  // values for the readable and the writable sides of the duplex stream,\n  // e.g. options.readableObjectMode vs. options.writableObjectMode, etc.\n\n  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n\n  this.objectMode = !!options.objectMode;\n  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode; // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n\n  this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex); // if _final has been called\n\n  this.finalCalled = false; // drain event flag.\n\n  this.needDrain = false; // at the start of calling end()\n\n  this.ending = false; // when end() has been called, and returned\n\n  this.ended = false; // when 'finish' is emitted\n\n  this.finished = false; // has it been destroyed\n\n  this.destroyed = false; // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode; // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n\n  this.defaultEncoding = options.defaultEncoding || 'utf8'; // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n\n  this.length = 0; // a flag to see when we're in the middle of a write.\n\n  this.writing = false; // when true all writes will be buffered until .uncork() call\n\n  this.corked = 0; // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n\n  this.sync = true; // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n\n  this.bufferProcessing = false; // the callback that's passed to _write(chunk,cb)\n\n  this.onwrite = function (er) {\n    onwrite(stream, er);\n  }; // the callback that the user supplies to write(chunk,encoding,cb)\n\n\n  this.writecb = null; // the amount that is being written when _write is called.\n\n  this.writelen = 0;\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null; // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n\n  this.pendingcb = 0; // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n\n  this.prefinished = false; // True if the error was already emitted and should not be thrown again\n\n  this.errorEmitted = false; // Should close be emitted on destroy. Defaults to true.\n\n  this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'finish' (and potentially 'end')\n\n  this.autoDestroy = !!options.autoDestroy; // count buffered requests\n\n  this.bufferedRequestCount = 0; // allocate the first CorkedRequest, there is always\n  // one allocated and free to use, and we maintain at most two\n\n  this.corkedRequestsFree = new CorkedRequest(this);\n}\n\nWritableState.prototype.getBuffer = function getBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n\n  return out;\n};\n\n(function () {\n  try {\n    Object.defineProperty(WritableState.prototype, 'buffer', {\n      get: internalUtil.deprecate(function writableStateBufferGetter() {\n        return this.getBuffer();\n      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')\n    });\n  } catch (_) {}\n})(); // Test _writableState for inheritance to account for Duplex streams,\n// whose prototype chain only points to Readable.\n\n\nvar realHasInstance;\n\nif (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {\n  realHasInstance = Function.prototype[Symbol.hasInstance];\n  Object.defineProperty(Writable, Symbol.hasInstance, {\n    value: function value(object) {\n      if (realHasInstance.call(this, object)) return true;\n      if (this !== Writable) return false;\n      return object && object._writableState instanceof WritableState;\n    }\n  });\n} else {\n  realHasInstance = function realHasInstance(object) {\n    return object instanceof this;\n  };\n}\n\nfunction Writable(options) {\n  Duplex = Duplex || require('./_stream_duplex'); // Writable ctor is applied to Duplexes, too.\n  // `realHasInstance` is necessary because using plain `instanceof`\n  // would return false, as no `_writableState` property is attached.\n  // Trying to use the custom `instanceof` for Writable here will also break the\n  // Node.js LazyTransform implementation, which has a non-trivial getter for\n  // `_writableState` that would lead to infinite recursion.\n  // Checking for a Stream.Duplex instance is faster here instead of inside\n  // the WritableState constructor, at least with V8 6.5\n\n  var isDuplex = this instanceof Duplex;\n  if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);\n  this._writableState = new WritableState(options, this, isDuplex); // legacy.\n\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function') this._write = options.write;\n    if (typeof options.writev === 'function') this._writev = options.writev;\n    if (typeof options.destroy === 'function') this._destroy = options.destroy;\n    if (typeof options.final === 'function') this._final = options.final;\n  }\n\n  Stream.call(this);\n} // Otherwise people can pipe Writable streams, which is just wrong.\n\n\nWritable.prototype.pipe = function () {\n  errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());\n};\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new ERR_STREAM_WRITE_AFTER_END(); // TODO: defer error events consistently everywhere, not just the cb\n\n  errorOrDestroy(stream, er);\n  process.nextTick(cb, er);\n} // Checks that a user-supplied chunk is valid, especially for the particular\n// mode the stream is in. Currently this means that `null` is never accepted\n// and undefined/non-string values are only allowed in object mode.\n\n\nfunction validChunk(stream, state, chunk, cb) {\n  var er;\n\n  if (chunk === null) {\n    er = new ERR_STREAM_NULL_VALUES();\n  } else if (typeof chunk !== 'string' && !state.objectMode) {\n    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer'], chunk);\n  }\n\n  if (er) {\n    errorOrDestroy(stream, er);\n    process.nextTick(cb, er);\n    return false;\n  }\n\n  return true;\n}\n\nWritable.prototype.write = function (chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n\n  var isBuf = !state.objectMode && _isUint8Array(chunk);\n\n  if (isBuf && !Buffer.isBuffer(chunk)) {\n    chunk = _uint8ArrayToBuffer(chunk);\n  }\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;\n  if (typeof cb !== 'function') cb = nop;\n  if (state.ending) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);\n  }\n  return ret;\n};\n\nWritable.prototype.cork = function () {\n  this._writableState.corked++;\n};\n\nWritable.prototype.uncork = function () {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n    if (!state.writing && !state.corked && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string') encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new ERR_UNKNOWN_ENCODING(encoding);\n  this._writableState.defaultEncoding = encoding;\n  return this;\n};\n\nObject.defineProperty(Writable.prototype, 'writableBuffer', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState && this._writableState.getBuffer();\n  }\n});\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {\n    chunk = Buffer.from(chunk, encoding);\n  }\n\n  return chunk;\n}\n\nObject.defineProperty(Writable.prototype, 'writableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.highWaterMark;\n  }\n}); // if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\n\nfunction writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {\n  if (!isBuf) {\n    var newChunk = decodeChunk(state, chunk, encoding);\n\n    if (chunk !== newChunk) {\n      isBuf = true;\n      encoding = 'buffer';\n      chunk = newChunk;\n    }\n  }\n\n  var len = state.objectMode ? 1 : chunk.length;\n  state.length += len;\n  var ret = state.length < state.highWaterMark; // we must ensure that previous needDrain will not be reset to false.\n\n  if (!ret) state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = {\n      chunk: chunk,\n      encoding: encoding,\n      isBuf: isBuf,\n      callback: cb,\n      next: null\n    };\n\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n\n    state.bufferedRequestCount += 1;\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'));else if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n\n  if (sync) {\n    // defer the callback if we are being called synchronously\n    // to avoid piling up things on the stack\n    process.nextTick(cb, er); // this can emit finish, and it will always happen\n    // after error\n\n    process.nextTick(finishMaybe, stream, state);\n    stream._writableState.errorEmitted = true;\n    errorOrDestroy(stream, er);\n  } else {\n    // the caller expect this to happen before if\n    // it is async\n    cb(er);\n    stream._writableState.errorEmitted = true;\n    errorOrDestroy(stream, er); // this can emit finish, but finish must\n    // always follow error\n\n    finishMaybe(stream, state);\n  }\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n  if (typeof cb !== 'function') throw new ERR_MULTIPLE_CALLBACK();\n  onwriteStateUpdate(state);\n  if (er) onwriteError(stream, state, sync, er, cb);else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state) || stream.destroyed;\n\n    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      process.nextTick(afterWrite, stream, state, finished, cb);\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished) onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n} // Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\n\n\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n} // if there's something in the buffer waiting, then process it\n\n\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var l = state.bufferedRequestCount;\n    var buffer = new Array(l);\n    var holder = state.corkedRequestsFree;\n    holder.entry = entry;\n    var count = 0;\n    var allBuffers = true;\n\n    while (entry) {\n      buffer[count] = entry;\n      if (!entry.isBuf) allBuffers = false;\n      entry = entry.next;\n      count += 1;\n    }\n\n    buffer.allBuffers = allBuffers;\n    doWrite(stream, state, true, state.length, buffer, '', holder.finish); // doWrite is almost always async, defer these to save a bit of time\n    // as the hot path ends with doWrite\n\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n\n    if (holder.next) {\n      state.corkedRequestsFree = holder.next;\n      holder.next = null;\n    } else {\n      state.corkedRequestsFree = new CorkedRequest(state);\n    }\n\n    state.bufferedRequestCount = 0;\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      state.bufferedRequestCount--; // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null) state.lastBufferedRequest = null;\n  }\n\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function (chunk, encoding, cb) {\n  cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function (chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); // .end() fully uncorks\n\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  } // ignore unnecessary end() calls.\n\n\n  if (!state.ending) endWritable(this, state, cb);\n  return this;\n};\n\nObject.defineProperty(Writable.prototype, 'writableLength', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.length;\n  }\n});\n\nfunction needFinish(state) {\n  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;\n}\n\nfunction callFinal(stream, state) {\n  stream._final(function (err) {\n    state.pendingcb--;\n\n    if (err) {\n      errorOrDestroy(stream, err);\n    }\n\n    state.prefinished = true;\n    stream.emit('prefinish');\n    finishMaybe(stream, state);\n  });\n}\n\nfunction prefinish(stream, state) {\n  if (!state.prefinished && !state.finalCalled) {\n    if (typeof stream._final === 'function' && !state.destroyed) {\n      state.pendingcb++;\n      state.finalCalled = true;\n      process.nextTick(callFinal, stream, state);\n    } else {\n      state.prefinished = true;\n      stream.emit('prefinish');\n    }\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n\n  if (need) {\n    prefinish(stream, state);\n\n    if (state.pendingcb === 0) {\n      state.finished = true;\n      stream.emit('finish');\n\n      if (state.autoDestroy) {\n        // In case of duplex streams we need a way to detect\n        // if the readable side is ready for autoDestroy as well\n        var rState = stream._readableState;\n\n        if (!rState || rState.autoDestroy && rState.endEmitted) {\n          stream.destroy();\n        }\n      }\n    }\n  }\n\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n\n  if (cb) {\n    if (state.finished) process.nextTick(cb);else stream.once('finish', cb);\n  }\n\n  state.ended = true;\n  stream.writable = false;\n}\n\nfunction onCorkedFinish(corkReq, state, err) {\n  var entry = corkReq.entry;\n  corkReq.entry = null;\n\n  while (entry) {\n    var cb = entry.callback;\n    state.pendingcb--;\n    cb(err);\n    entry = entry.next;\n  } // reuse the free corkReq.\n\n\n  state.corkedRequestsFree.next = corkReq;\n}\n\nObject.defineProperty(Writable.prototype, 'destroyed', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    if (this._writableState === undefined) {\n      return false;\n    }\n\n    return this._writableState.destroyed;\n  },\n  set: function set(value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (!this._writableState) {\n      return;\n    } // backward compatibility, the user is explicitly\n    // managing destroyed\n\n\n    this._writableState.destroyed = value;\n  }\n});\nWritable.prototype.destroy = destroyImpl.destroy;\nWritable.prototype._undestroy = destroyImpl.undestroy;\n\nWritable.prototype._destroy = function (err, cb) {\n  cb(err);\n};","function _setPrototypeOf(o, p) {\n  module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  return _setPrototypeOf(o, p);\n}\n\nmodule.exports = _setPrototypeOf;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","var $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar aFunction = require('../internals/a-function');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar bind = require('../internals/function-bind');\nvar fails = require('../internals/fails');\n\nvar nativeConstruct = getBuiltIn('Reflect', 'construct');\n\n// `Reflect.construct` method\n// https://tc39.es/ecma262/#sec-reflect.construct\n// MS Edge supports only 2 arguments and argumentsList argument is optional\n// FF Nightly sets third argument as `new.target`, but does not create `this` from it\nvar NEW_TARGET_BUG = fails(function () {\n  function F() { /* empty */ }\n  return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);\n});\nvar ARGS_BUG = !fails(function () {\n  nativeConstruct(function () { /* empty */ });\n});\nvar FORCED = NEW_TARGET_BUG || ARGS_BUG;\n\n$({ target: 'Reflect', stat: true, forced: FORCED, sham: FORCED }, {\n  construct: function construct(Target, args /* , newTarget */) {\n    aFunction(Target);\n    anObject(args);\n    var newTarget = arguments.length < 3 ? Target : aFunction(arguments[2]);\n    if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);\n    if (Target == newTarget) {\n      // w/o altered newTarget, optimization for 0-4 arguments\n      switch (args.length) {\n        case 0: return new Target();\n        case 1: return new Target(args[0]);\n        case 2: return new Target(args[0], args[1]);\n        case 3: return new Target(args[0], args[1], args[2]);\n        case 4: return new Target(args[0], args[1], args[2], args[3]);\n      }\n      // w/o altered newTarget, lot of arguments case\n      var $args = [null];\n      $args.push.apply($args, args);\n      return new (bind.apply(Target, $args))();\n    }\n    // with altered newTarget, not support built-in constructors\n    var proto = newTarget.prototype;\n    var instance = create(isObject(proto) ? proto : Object.prototype);\n    var result = Function.apply.call(Target, instance, args);\n    return isObject(result) ? result : instance;\n  }\n});\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * Output Feedback block mode.\n\t */\n\tCryptoJS.mode.OFB = (function () {\n\t    var OFB = CryptoJS.lib.BlockCipherMode.extend();\n\n\t    var Encryptor = OFB.Encryptor = OFB.extend({\n\t        processBlock: function (words, offset) {\n\t            // Shortcuts\n\t            var cipher = this._cipher\n\t            var blockSize = cipher.blockSize;\n\t            var iv = this._iv;\n\t            var keystream = this._keystream;\n\n\t            // Generate keystream\n\t            if (iv) {\n\t                keystream = this._keystream = iv.slice(0);\n\n\t                // Remove IV for subsequent blocks\n\t                this._iv = undefined;\n\t            }\n\t            cipher.encryptBlock(keystream, 0);\n\n\t            // Encrypt\n\t            for (var i = 0; i < blockSize; i++) {\n\t                words[offset + i] ^= keystream[i];\n\t            }\n\t        }\n\t    });\n\n\t    OFB.Decryptor = Encryptor;\n\n\t    return OFB;\n\t}());\n\n\n\treturn CryptoJS.mode.OFB;\n\n}));","var topLevel = typeof global !== 'undefined' ? global :\n    typeof window !== 'undefined' ? window : {}\nvar minDoc = require('min-document');\n\nvar doccy;\n\nif (typeof document !== 'undefined') {\n    doccy = document;\n} else {\n    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n\n    if (!doccy) {\n        doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n    }\n}\n\nmodule.exports = doccy;\n","var toIndexedObject = require('../internals/to-indexed-object');\nvar toLength = require('../internals/to-length');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\n\n// `Array.prototype.{ indexOf, includes }` methods implementation\nvar createMethod = function (IS_INCLUDES) {\n  return function ($this, el, fromIndex) {\n    var O = toIndexedObject($this);\n    var length = toLength(O.length);\n    var index = toAbsoluteIndex(fromIndex, length);\n    var value;\n    // Array#includes uses SameValueZero equality algorithm\n    // eslint-disable-next-line no-self-compare -- NaN check\n    if (IS_INCLUDES && el != el) while (length > index) {\n      value = O[index++];\n      // eslint-disable-next-line no-self-compare -- NaN check\n      if (value != value) return true;\n    // Array#indexOf ignores holes, Array#includes - not\n    } else for (;length > index; index++) {\n      if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;\n    } return !IS_INCLUDES && -1;\n  };\n};\n\nmodule.exports = {\n  // `Array.prototype.includes` method\n  // https://tc39.es/ecma262/#sec-array.prototype.includes\n  includes: createMethod(true),\n  // `Array.prototype.indexOf` method\n  // https://tc39.es/ecma262/#sec-array.prototype.indexof\n  indexOf: createMethod(false)\n};\n","// adapted from https://github.com/apatil/pemstrip\nvar findProc = /Proc-Type: 4,ENCRYPTED[\\n\\r]+DEK-Info: AES-((?:128)|(?:192)|(?:256))-CBC,([0-9A-H]+)[\\n\\r]+([0-9A-z\\n\\r+/=]+)[\\n\\r]+/m\nvar startRegex = /^-----BEGIN ((?:.*? KEY)|CERTIFICATE)-----/m\nvar fullRegex = /^-----BEGIN ((?:.*? KEY)|CERTIFICATE)-----([0-9A-z\\n\\r+/=]+)-----END \\1-----$/m\nvar evp = require('evp_bytestokey')\nvar ciphers = require('browserify-aes')\nvar Buffer = require('safe-buffer').Buffer\nmodule.exports = function (okey, password) {\n  var key = okey.toString()\n  var match = key.match(findProc)\n  var decrypted\n  if (!match) {\n    var match2 = key.match(fullRegex)\n    decrypted = Buffer.from(match2[2].replace(/[\\r\\n]/g, ''), 'base64')\n  } else {\n    var suite = 'aes' + match[1]\n    var iv = Buffer.from(match[2], 'hex')\n    var cipherText = Buffer.from(match[3].replace(/[\\r\\n]/g, ''), 'base64')\n    var cipherKey = evp(password, iv.slice(0, 8), parseInt(match[1], 10)).key\n    var out = []\n    var cipher = ciphers.createDecipheriv(suite, cipherKey, iv)\n    out.push(cipher.update(cipherText))\n    out.push(cipher.final())\n    decrypted = Buffer.concat(out)\n  }\n  var tag = key.match(startRegex)[1]\n  return {\n    tag: tag,\n    data: decrypted\n  }\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar $filter = require('../internals/array-iteration').filter;\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');\n\n// `Array.prototype.filter` method\n// https://tc39.es/ecma262/#sec-array.prototype.filter\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {\n  filter: function filter(callbackfn /* , thisArg */) {\n    return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","'use strict';\nvar bind = require('../internals/function-bind-context');\nvar toObject = require('../internals/to-object');\nvar callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing');\nvar isArrayIteratorMethod = require('../internals/is-array-iterator-method');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\n// `Array.from` method implementation\n// https://tc39.es/ecma262/#sec-array.from\nmodule.exports = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {\n  var O = toObject(arrayLike);\n  var C = typeof this == 'function' ? this : Array;\n  var argumentsLength = arguments.length;\n  var mapfn = argumentsLength > 1 ? arguments[1] : undefined;\n  var mapping = mapfn !== undefined;\n  var iteratorMethod = getIteratorMethod(O);\n  var index = 0;\n  var length, result, step, iterator, next, value;\n  if (mapping) mapfn = bind(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);\n  // if the target is not iterable or it's an array with the default iterator - use a simple case\n  if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {\n    iterator = iteratorMethod.call(O);\n    next = iterator.next;\n    result = new C();\n    for (;!(step = next.call(iterator)).done; index++) {\n      value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;\n      createProperty(result, index, value);\n    }\n  } else {\n    length = toLength(O.length);\n    result = new C(length);\n    for (;length > index; index++) {\n      value = mapping ? mapfn(O[index], index) : O[index];\n      createProperty(result, index, value);\n    }\n  }\n  result.length = index;\n  return result;\n};\n","'use strict';\n\nvar assert = require('minimalistic-assert');\nvar inherits = require('inherits');\n\nvar utils = require('./utils');\nvar Cipher = require('./cipher');\n\nfunction DESState() {\n  this.tmp = new Array(2);\n  this.keys = null;\n}\n\nfunction DES(options) {\n  Cipher.call(this, options);\n\n  var state = new DESState();\n  this._desState = state;\n\n  this.deriveKeys(state, options.key);\n}\ninherits(DES, Cipher);\nmodule.exports = DES;\n\nDES.create = function create(options) {\n  return new DES(options);\n};\n\nvar shiftTable = [\n  1, 1, 2, 2, 2, 2, 2, 2,\n  1, 2, 2, 2, 2, 2, 2, 1\n];\n\nDES.prototype.deriveKeys = function deriveKeys(state, key) {\n  state.keys = new Array(16 * 2);\n\n  assert.equal(key.length, this.blockSize, 'Invalid key length');\n\n  var kL = utils.readUInt32BE(key, 0);\n  var kR = utils.readUInt32BE(key, 4);\n\n  utils.pc1(kL, kR, state.tmp, 0);\n  kL = state.tmp[0];\n  kR = state.tmp[1];\n  for (var i = 0; i < state.keys.length; i += 2) {\n    var shift = shiftTable[i >>> 1];\n    kL = utils.r28shl(kL, shift);\n    kR = utils.r28shl(kR, shift);\n    utils.pc2(kL, kR, state.keys, i);\n  }\n};\n\nDES.prototype._update = function _update(inp, inOff, out, outOff) {\n  var state = this._desState;\n\n  var l = utils.readUInt32BE(inp, inOff);\n  var r = utils.readUInt32BE(inp, inOff + 4);\n\n  // Initial Permutation\n  utils.ip(l, r, state.tmp, 0);\n  l = state.tmp[0];\n  r = state.tmp[1];\n\n  if (this.type === 'encrypt')\n    this._encrypt(state, l, r, state.tmp, 0);\n  else\n    this._decrypt(state, l, r, state.tmp, 0);\n\n  l = state.tmp[0];\n  r = state.tmp[1];\n\n  utils.writeUInt32BE(out, l, outOff);\n  utils.writeUInt32BE(out, r, outOff + 4);\n};\n\nDES.prototype._pad = function _pad(buffer, off) {\n  var value = buffer.length - off;\n  for (var i = off; i < buffer.length; i++)\n    buffer[i] = value;\n\n  return true;\n};\n\nDES.prototype._unpad = function _unpad(buffer) {\n  var pad = buffer[buffer.length - 1];\n  for (var i = buffer.length - pad; i < buffer.length; i++)\n    assert.equal(buffer[i], pad);\n\n  return buffer.slice(0, buffer.length - pad);\n};\n\nDES.prototype._encrypt = function _encrypt(state, lStart, rStart, out, off) {\n  var l = lStart;\n  var r = rStart;\n\n  // Apply f() x16 times\n  for (var i = 0; i < state.keys.length; i += 2) {\n    var keyL = state.keys[i];\n    var keyR = state.keys[i + 1];\n\n    // f(r, k)\n    utils.expand(r, state.tmp, 0);\n\n    keyL ^= state.tmp[0];\n    keyR ^= state.tmp[1];\n    var s = utils.substitute(keyL, keyR);\n    var f = utils.permute(s);\n\n    var t = r;\n    r = (l ^ f) >>> 0;\n    l = t;\n  }\n\n  // Reverse Initial Permutation\n  utils.rip(r, l, out, off);\n};\n\nDES.prototype._decrypt = function _decrypt(state, lStart, rStart, out, off) {\n  var l = rStart;\n  var r = lStart;\n\n  // Apply f() x16 times\n  for (var i = state.keys.length - 2; i >= 0; i -= 2) {\n    var keyL = state.keys[i];\n    var keyR = state.keys[i + 1];\n\n    // f(r, k)\n    utils.expand(l, state.tmp, 0);\n\n    keyL ^= state.tmp[0];\n    keyR ^= state.tmp[1];\n    var s = utils.substitute(keyL, keyR);\n    var f = utils.permute(s);\n\n    var t = l;\n    l = (r ^ f) >>> 0;\n    r = t;\n  }\n\n  // Reverse Initial Permutation\n  utils.rip(l, r, out, off);\n};\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\nvar _objCreate = Object.create || (function() {\n  function F() {}\n  return function(o) {\n    if (arguments.length !== 1) {\n      throw new Error('Object.create shim only accepts one parameter.');\n    }\n    F.prototype = o;\n    return new F();\n  };\n})();\n\n// Creates a new ParserError object from an errorData object. The errorData\n// object should have default code and message properties. The default message\n// property can be overriden by passing in a message parameter.\n// See ParsingError.Errors below for acceptable errors.\nfunction ParsingError(errorData, message) {\n  this.name = \"ParsingError\";\n  this.code = errorData.code;\n  this.message = message || errorData.message;\n}\nParsingError.prototype = _objCreate(Error.prototype);\nParsingError.prototype.constructor = ParsingError;\n\n// ParsingError metadata for acceptable ParsingErrors.\nParsingError.Errors = {\n  BadSignature: {\n    code: 0,\n    message: \"Malformed WebVTT signature.\"\n  },\n  BadTimeStamp: {\n    code: 1,\n    message: \"Malformed time stamp.\"\n  }\n};\n\n// Try to parse input as a time stamp.\nfunction parseTimeStamp(input) {\n\n  function computeSeconds(h, m, s, f) {\n    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n  }\n\n  var m = input.match(/^(\\d+):(\\d{2})(:\\d{2})?\\.(\\d{3})/);\n  if (!m) {\n    return null;\n  }\n\n  if (m[3]) {\n    // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n    return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n  } else if (m[1] > 59) {\n    // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n    // First position is hours as it's over 59.\n    return computeSeconds(m[1], m[2], 0,  m[4]);\n  } else {\n    // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n    return computeSeconds(0, m[1], m[2], m[4]);\n  }\n}\n\n// A settings object holds key/value pairs and will ignore anything but the first\n// assignment to a specific key.\nfunction Settings() {\n  this.values = _objCreate(null);\n}\n\nSettings.prototype = {\n  // Only accept the first assignment to any key.\n  set: function(k, v) {\n    if (!this.get(k) && v !== \"\") {\n      this.values[k] = v;\n    }\n  },\n  // Return the value for a key, or a default value.\n  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n  // a number of possible default values as properties where 'defaultKey' is\n  // the key of the property that will be chosen; otherwise it's assumed to be\n  // a single value.\n  get: function(k, dflt, defaultKey) {\n    if (defaultKey) {\n      return this.has(k) ? this.values[k] : dflt[defaultKey];\n    }\n    return this.has(k) ? this.values[k] : dflt;\n  },\n  // Check whether we have a value for a key.\n  has: function(k) {\n    return k in this.values;\n  },\n  // Accept a setting if its one of the given alternatives.\n  alt: function(k, v, a) {\n    for (var n = 0; n < a.length; ++n) {\n      if (v === a[n]) {\n        this.set(k, v);\n        break;\n      }\n    }\n  },\n  // Accept a setting if its a valid (signed) integer.\n  integer: function(k, v) {\n    if (/^-?\\d+$/.test(v)) { // integer\n      this.set(k, parseInt(v, 10));\n    }\n  },\n  // Accept a setting if its a valid percentage.\n  percent: function(k, v) {\n    var m;\n    if ((m = v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/))) {\n      v = parseFloat(v);\n      if (v >= 0 && v <= 100) {\n        this.set(k, v);\n        return true;\n      }\n    }\n    return false;\n  }\n};\n\n// Helper function to parse input into groups separated by 'groupDelim', and\n// interprete each group as a key/value pair separated by 'keyValueDelim'.\nfunction parseOptions(input, callback, keyValueDelim, groupDelim) {\n  var groups = groupDelim ? input.split(groupDelim) : [input];\n  for (var i in groups) {\n    if (typeof groups[i] !== \"string\") {\n      continue;\n    }\n    var kv = groups[i].split(keyValueDelim);\n    if (kv.length !== 2) {\n      continue;\n    }\n    var k = kv[0];\n    var v = kv[1];\n    callback(k, v);\n  }\n}\n\nfunction parseCue(input, cue, regionList) {\n  // Remember the original input if we need to throw an error.\n  var oInput = input;\n  // 4.1 WebVTT timestamp\n  function consumeTimeStamp() {\n    var ts = parseTimeStamp(input);\n    if (ts === null) {\n      throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                            \"Malformed timestamp: \" + oInput);\n    }\n    // Remove time stamp from input.\n    input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n    return ts;\n  }\n\n  // 4.4.2 WebVTT cue settings\n  function consumeCueSettings(input, cue) {\n    var settings = new Settings();\n\n    parseOptions(input, function (k, v) {\n      switch (k) {\n      case \"region\":\n        // Find the last region we parsed with the same region id.\n        for (var i = regionList.length - 1; i >= 0; i--) {\n          if (regionList[i].id === v) {\n            settings.set(k, regionList[i].region);\n            break;\n          }\n        }\n        break;\n      case \"vertical\":\n        settings.alt(k, v, [\"rl\", \"lr\"]);\n        break;\n      case \"line\":\n        var vals = v.split(\",\"),\n            vals0 = vals[0];\n        settings.integer(k, vals0);\n        settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n        settings.alt(k, vals0, [\"auto\"]);\n        if (vals.length === 2) {\n          settings.alt(\"lineAlign\", vals[1], [\"start\", \"middle\", \"end\"]);\n        }\n        break;\n      case \"position\":\n        vals = v.split(\",\");\n        settings.percent(k, vals[0]);\n        if (vals.length === 2) {\n          settings.alt(\"positionAlign\", vals[1], [\"start\", \"middle\", \"end\"]);\n        }\n        break;\n      case \"size\":\n        settings.percent(k, v);\n        break;\n      case \"align\":\n        settings.alt(k, v, [\"start\", \"middle\", \"end\", \"left\", \"right\"]);\n        break;\n      }\n    }, /:/, /\\s/);\n\n    // Apply default values for any missing fields.\n    cue.region = settings.get(\"region\", null);\n    cue.vertical = settings.get(\"vertical\", \"\");\n    cue.line = settings.get(\"line\", \"auto\");\n    cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n    cue.snapToLines = settings.get(\"snapToLines\", true);\n    cue.size = settings.get(\"size\", 100);\n    cue.align = settings.get(\"align\", \"middle\");\n    cue.position = settings.get(\"position\", {\n      start: 0,\n      left: 0,\n      middle: 50,\n      end: 100,\n      right: 100\n    }, cue.align);\n    cue.positionAlign = settings.get(\"positionAlign\", {\n      start: \"start\",\n      left: \"start\",\n      middle: \"middle\",\n      end: \"end\",\n      right: \"end\"\n    }, cue.align);\n  }\n\n  function skipWhitespace() {\n    input = input.replace(/^\\s+/, \"\");\n  }\n\n  // 4.1 WebVTT cue timings.\n  skipWhitespace();\n  cue.startTime = consumeTimeStamp();   // (1) collect cue start time\n  skipWhitespace();\n  if (input.substr(0, 3) !== \"-->\") {     // (3) next characters must match \"-->\"\n    throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                           \"Malformed time stamp (time stamps must be separated by '-->'): \" +\n                           oInput);\n  }\n  input = input.substr(3);\n  skipWhitespace();\n  cue.endTime = consumeTimeStamp();     // (5) collect cue end time\n\n  // 4.1 WebVTT cue settings list.\n  skipWhitespace();\n  consumeCueSettings(input, cue);\n}\n\nvar ESCAPE = {\n  \"&amp;\": \"&\",\n  \"&lt;\": \"<\",\n  \"&gt;\": \">\",\n  \"&lrm;\": \"\\u200e\",\n  \"&rlm;\": \"\\u200f\",\n  \"&nbsp;\": \"\\u00a0\"\n};\n\nvar TAG_NAME = {\n  c: \"span\",\n  i: \"i\",\n  b: \"b\",\n  u: \"u\",\n  ruby: \"ruby\",\n  rt: \"rt\",\n  v: \"span\",\n  lang: \"span\"\n};\n\nvar TAG_ANNOTATION = {\n  v: \"title\",\n  lang: \"lang\"\n};\n\nvar NEEDS_PARENT = {\n  rt: \"ruby\"\n};\n\n// Parse content into a document fragment.\nfunction parseContent(window, input) {\n  function nextToken() {\n    // Check for end-of-string.\n    if (!input) {\n      return null;\n    }\n\n    // Consume 'n' characters from the input.\n    function consume(result) {\n      input = input.substr(result.length);\n      return result;\n    }\n\n    var m = input.match(/^([^<]*)(<[^>]*>?)?/);\n    // If there is some text before the next tag, return it, otherwise return\n    // the tag.\n    return consume(m[1] ? m[1] : m[2]);\n  }\n\n  // Unescape a string 's'.\n  function unescape1(e) {\n    return ESCAPE[e];\n  }\n  function unescape(s) {\n    while ((m = s.match(/&(amp|lt|gt|lrm|rlm|nbsp);/))) {\n      s = s.replace(m[0], unescape1);\n    }\n    return s;\n  }\n\n  function shouldAdd(current, element) {\n    return !NEEDS_PARENT[element.localName] ||\n           NEEDS_PARENT[element.localName] === current.localName;\n  }\n\n  // Create an element for this tag.\n  function createElement(type, annotation) {\n    var tagName = TAG_NAME[type];\n    if (!tagName) {\n      return null;\n    }\n    var element = window.document.createElement(tagName);\n    element.localName = tagName;\n    var name = TAG_ANNOTATION[type];\n    if (name && annotation) {\n      element[name] = annotation.trim();\n    }\n    return element;\n  }\n\n  var rootDiv = window.document.createElement(\"div\"),\n      current = rootDiv,\n      t,\n      tagStack = [];\n\n  while ((t = nextToken()) !== null) {\n    if (t[0] === '<') {\n      if (t[1] === \"/\") {\n        // If the closing tag matches, move back up to the parent node.\n        if (tagStack.length &&\n            tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n          tagStack.pop();\n          current = current.parentNode;\n        }\n        // Otherwise just ignore the end tag.\n        continue;\n      }\n      var ts = parseTimeStamp(t.substr(1, t.length - 2));\n      var node;\n      if (ts) {\n        // Timestamps are lead nodes as well.\n        node = window.document.createProcessingInstruction(\"timestamp\", ts);\n        current.appendChild(node);\n        continue;\n      }\n      var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/);\n      // If we can't parse the tag, skip to the next tag.\n      if (!m) {\n        continue;\n      }\n      // Try to construct an element, and ignore the tag if we couldn't.\n      node = createElement(m[1], m[3]);\n      if (!node) {\n        continue;\n      }\n      // Determine if the tag should be added based on the context of where it\n      // is placed in the cuetext.\n      if (!shouldAdd(current, node)) {\n        continue;\n      }\n      // Set the class list (as a list of classes, separated by space).\n      if (m[2]) {\n        node.className = m[2].substr(1).replace('.', ' ');\n      }\n      // Append the node to the current node, and enter the scope of the new\n      // node.\n      tagStack.push(m[1]);\n      current.appendChild(node);\n      current = node;\n      continue;\n    }\n\n    // Text nodes are leaf nodes.\n    current.appendChild(window.document.createTextNode(unescape(t)));\n  }\n\n  return rootDiv;\n}\n\n// This is a list of all the Unicode characters that have a strong\n// right-to-left category. What this means is that these characters are\n// written right-to-left for sure. It was generated by pulling all the strong\n// right-to-left characters out of the Unicode data table. That table can\n// found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\nvar strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6],\n [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d],\n [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6],\n [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5],\n [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815],\n [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858],\n [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f],\n [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c],\n [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1],\n [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc],\n [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808],\n [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855],\n [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f],\n [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13],\n [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58],\n [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72],\n [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f],\n [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32],\n [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42],\n [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f],\n [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59],\n [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62],\n [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77],\n [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b],\n [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n\nfunction isStrongRTLChar(charCode) {\n  for (var i = 0; i < strongRTLRanges.length; i++) {\n    var currentRange = strongRTLRanges[i];\n    if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction determineBidi(cueDiv) {\n  var nodeStack = [],\n      text = \"\",\n      charCode;\n\n  if (!cueDiv || !cueDiv.childNodes) {\n    return \"ltr\";\n  }\n\n  function pushNodes(nodeStack, node) {\n    for (var i = node.childNodes.length - 1; i >= 0; i--) {\n      nodeStack.push(node.childNodes[i]);\n    }\n  }\n\n  function nextTextNode(nodeStack) {\n    if (!nodeStack || !nodeStack.length) {\n      return null;\n    }\n\n    var node = nodeStack.pop(),\n        text = node.textContent || node.innerText;\n    if (text) {\n      // TODO: This should match all unicode type B characters (paragraph\n      // separator characters). See issue #115.\n      var m = text.match(/^.*(\\n|\\r)/);\n      if (m) {\n        nodeStack.length = 0;\n        return m[0];\n      }\n      return text;\n    }\n    if (node.tagName === \"ruby\") {\n      return nextTextNode(nodeStack);\n    }\n    if (node.childNodes) {\n      pushNodes(nodeStack, node);\n      return nextTextNode(nodeStack);\n    }\n  }\n\n  pushNodes(nodeStack, cueDiv);\n  while ((text = nextTextNode(nodeStack))) {\n    for (var i = 0; i < text.length; i++) {\n      charCode = text.charCodeAt(i);\n      if (isStrongRTLChar(charCode)) {\n        return \"rtl\";\n      }\n    }\n  }\n  return \"ltr\";\n}\n\nfunction computeLinePos(cue) {\n  if (typeof cue.line === \"number\" &&\n      (cue.snapToLines || (cue.line >= 0 && cue.line <= 100))) {\n    return cue.line;\n  }\n  if (!cue.track || !cue.track.textTrackList ||\n      !cue.track.textTrackList.mediaElement) {\n    return -1;\n  }\n  var track = cue.track,\n      trackList = track.textTrackList,\n      count = 0;\n  for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n    if (trackList[i].mode === \"showing\") {\n      count++;\n    }\n  }\n  return ++count * -1;\n}\n\nfunction StyleBox() {\n}\n\n// Apply styles to a div. If there is no div passed then it defaults to the\n// div on 'this'.\nStyleBox.prototype.applyStyles = function(styles, div) {\n  div = div || this.div;\n  for (var prop in styles) {\n    if (styles.hasOwnProperty(prop)) {\n      div.style[prop] = styles[prop];\n    }\n  }\n};\n\nStyleBox.prototype.formatStyle = function(val, unit) {\n  return val === 0 ? 0 : val + unit;\n};\n\n// Constructs the computed display state of the cue (a div). Places the div\n// into the overlay which should be a block level element (usually a div).\nfunction CueStyleBox(window, cue, styleOptions) {\n  var isIE8 = (/MSIE\\s8\\.0/).test(navigator.userAgent);\n  var color = \"rgba(255, 255, 255, 1)\";\n  var backgroundColor = \"rgba(0, 0, 0, 0.8)\";\n\n  if (isIE8) {\n    color = \"rgb(255, 255, 255)\";\n    backgroundColor = \"rgb(0, 0, 0)\";\n  }\n\n  StyleBox.call(this);\n  this.cue = cue;\n\n  // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n  // have inline positioning and will function as the cue background box.\n  this.cueDiv = parseContent(window, cue.text);\n  var styles = {\n    color: color,\n    backgroundColor: backgroundColor,\n    position: \"relative\",\n    left: 0,\n    right: 0,\n    top: 0,\n    bottom: 0,\n    display: \"inline\"\n  };\n\n  if (!isIE8) {\n    styles.writingMode = cue.vertical === \"\" ? \"horizontal-tb\"\n                                             : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                                     : \"vertical-rl\";\n    styles.unicodeBidi = \"plaintext\";\n  }\n  this.applyStyles(styles, this.cueDiv);\n\n  // Create an absolutely positioned div that will be used to position the cue\n  // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n  // mirrors of them except \"middle\" which is \"center\" in CSS.\n  this.div = window.document.createElement(\"div\");\n  styles = {\n    textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n    font: styleOptions.font,\n    whiteSpace: \"pre-line\",\n    position: \"absolute\"\n  };\n\n  if (!isIE8) {\n    styles.direction = determineBidi(this.cueDiv);\n    styles.writingMode = cue.vertical === \"\" ? \"horizontal-tb\"\n                                             : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                                     : \"vertical-rl\".\n    stylesunicodeBidi =  \"plaintext\";\n  }\n\n  this.applyStyles(styles);\n\n  this.div.appendChild(this.cueDiv);\n\n  // Calculate the distance from the reference edge of the viewport to the text\n  // position of the cue box. The reference edge will be resolved later when\n  // the box orientation styles are applied.\n  var textPos = 0;\n  switch (cue.positionAlign) {\n  case \"start\":\n    textPos = cue.position;\n    break;\n  case \"middle\":\n    textPos = cue.position - (cue.size / 2);\n    break;\n  case \"end\":\n    textPos = cue.position - cue.size;\n    break;\n  }\n\n  // Horizontal box orientation; textPos is the distance from the left edge of the\n  // area to the left edge of the box and cue.size is the distance extending to\n  // the right from there.\n  if (cue.vertical === \"\") {\n    this.applyStyles({\n      left:  this.formatStyle(textPos, \"%\"),\n      width: this.formatStyle(cue.size, \"%\")\n    });\n  // Vertical box orientation; textPos is the distance from the top edge of the\n  // area to the top edge of the box and cue.size is the height extending\n  // downwards from there.\n  } else {\n    this.applyStyles({\n      top: this.formatStyle(textPos, \"%\"),\n      height: this.formatStyle(cue.size, \"%\")\n    });\n  }\n\n  this.move = function(box) {\n    this.applyStyles({\n      top: this.formatStyle(box.top, \"px\"),\n      bottom: this.formatStyle(box.bottom, \"px\"),\n      left: this.formatStyle(box.left, \"px\"),\n      right: this.formatStyle(box.right, \"px\"),\n      height: this.formatStyle(box.height, \"px\"),\n      width: this.formatStyle(box.width, \"px\")\n    });\n  };\n}\nCueStyleBox.prototype = _objCreate(StyleBox.prototype);\nCueStyleBox.prototype.constructor = CueStyleBox;\n\n// Represents the co-ordinates of an Element in a way that we can easily\n// compute things with such as if it overlaps or intersects with another Element.\n// Can initialize it with either a StyleBox or another BoxPosition.\nfunction BoxPosition(obj) {\n  var isIE8 = (/MSIE\\s8\\.0/).test(navigator.userAgent);\n\n  // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n  // was passed in and we need to copy the results of 'getBoundingClientRect'\n  // as the object returned is readonly. All co-ordinate values are in reference\n  // to the viewport origin (top left).\n  var lh, height, width, top;\n  if (obj.div) {\n    height = obj.div.offsetHeight;\n    width = obj.div.offsetWidth;\n    top = obj.div.offsetTop;\n\n    var rects = (rects = obj.div.childNodes) && (rects = rects[0]) &&\n                rects.getClientRects && rects.getClientRects();\n    obj = obj.div.getBoundingClientRect();\n    // In certain cases the outter div will be slightly larger then the sum of\n    // the inner div's lines. This could be due to bold text, etc, on some platforms.\n    // In this case we should get the average line height and use that. This will\n    // result in the desired behaviour.\n    lh = rects ? Math.max((rects[0] && rects[0].height) || 0, obj.height / rects.length)\n               : 0;\n\n  }\n  this.left = obj.left;\n  this.right = obj.right;\n  this.top = obj.top || top;\n  this.height = obj.height || height;\n  this.bottom = obj.bottom || (top + (obj.height || height));\n  this.width = obj.width || width;\n  this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n\n  if (isIE8 && !this.lineHeight) {\n    this.lineHeight = 13;\n  }\n}\n\n// Move the box along a particular axis. Optionally pass in an amount to move\n// the box. If no amount is passed then the default is the line height of the\n// box.\nBoxPosition.prototype.move = function(axis, toMove) {\n  toMove = toMove !== undefined ? toMove : this.lineHeight;\n  switch (axis) {\n  case \"+x\":\n    this.left += toMove;\n    this.right += toMove;\n    break;\n  case \"-x\":\n    this.left -= toMove;\n    this.right -= toMove;\n    break;\n  case \"+y\":\n    this.top += toMove;\n    this.bottom += toMove;\n    break;\n  case \"-y\":\n    this.top -= toMove;\n    this.bottom -= toMove;\n    break;\n  }\n};\n\n// Check if this box overlaps another box, b2.\nBoxPosition.prototype.overlaps = function(b2) {\n  return this.left < b2.right &&\n         this.right > b2.left &&\n         this.top < b2.bottom &&\n         this.bottom > b2.top;\n};\n\n// Check if this box overlaps any other boxes in boxes.\nBoxPosition.prototype.overlapsAny = function(boxes) {\n  for (var i = 0; i < boxes.length; i++) {\n    if (this.overlaps(boxes[i])) {\n      return true;\n    }\n  }\n  return false;\n};\n\n// Check if this box is within another box.\nBoxPosition.prototype.within = function(container) {\n  return this.top >= container.top &&\n         this.bottom <= container.bottom &&\n         this.left >= container.left &&\n         this.right <= container.right;\n};\n\n// Check if this box is entirely within the container or it is overlapping\n// on the edge opposite of the axis direction passed. For example, if \"+x\" is\n// passed and the box is overlapping on the left edge of the container, then\n// return true.\nBoxPosition.prototype.overlapsOppositeAxis = function(container, axis) {\n  switch (axis) {\n  case \"+x\":\n    return this.left < container.left;\n  case \"-x\":\n    return this.right > container.right;\n  case \"+y\":\n    return this.top < container.top;\n  case \"-y\":\n    return this.bottom > container.bottom;\n  }\n};\n\n// Find the percentage of the area that this box is overlapping with another\n// box.\nBoxPosition.prototype.intersectPercentage = function(b2) {\n  var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n      intersectArea = x * y;\n  return intersectArea / (this.height * this.width);\n};\n\n// Convert the positions from this box to CSS compatible positions using\n// the reference container's positions. This has to be done because this\n// box's positions are in reference to the viewport origin, whereas, CSS\n// values are in referecne to their respective edges.\nBoxPosition.prototype.toCSSCompatValues = function(reference) {\n  return {\n    top: this.top - reference.top,\n    bottom: reference.bottom - this.bottom,\n    left: this.left - reference.left,\n    right: reference.right - this.right,\n    height: this.height,\n    width: this.width\n  };\n};\n\n// Get an object that represents the box's position without anything extra.\n// Can pass a StyleBox, HTMLElement, or another BoxPositon.\nBoxPosition.getSimpleBoxPosition = function(obj) {\n  var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n  var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n  var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n\n  obj = obj.div ? obj.div.getBoundingClientRect() :\n                obj.tagName ? obj.getBoundingClientRect() : obj;\n  var ret = {\n    left: obj.left,\n    right: obj.right,\n    top: obj.top || top,\n    height: obj.height || height,\n    bottom: obj.bottom || (top + (obj.height || height)),\n    width: obj.width || width\n  };\n  return ret;\n};\n\n// Move a StyleBox to its specified, or next best, position. The containerBox\n// is the box that contains the StyleBox, such as a div. boxPositions are\n// a list of other boxes that the styleBox can't overlap with.\nfunction moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n\n  // Find the best position for a cue box, b, on the video. The axis parameter\n  // is a list of axis, the order of which, it will move the box along. For example:\n  // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n  // direction. If it doesn't find a good position for it there it will then move\n  // it along the x axis in the negative direction.\n  function findBestPosition(b, axis) {\n    var bestPosition,\n        specifiedPosition = new BoxPosition(b),\n        percentage = 1; // Highest possible so the first thing we get is better.\n\n    for (var i = 0; i < axis.length; i++) {\n      while (b.overlapsOppositeAxis(containerBox, axis[i]) ||\n             (b.within(containerBox) && b.overlapsAny(boxPositions))) {\n        b.move(axis[i]);\n      }\n      // We found a spot where we aren't overlapping anything. This is our\n      // best position.\n      if (b.within(containerBox)) {\n        return b;\n      }\n      var p = b.intersectPercentage(containerBox);\n      // If we're outside the container box less then we were on our last try\n      // then remember this position as the best position.\n      if (percentage > p) {\n        bestPosition = new BoxPosition(b);\n        percentage = p;\n      }\n      // Reset the box position to the specified position.\n      b = new BoxPosition(specifiedPosition);\n    }\n    return bestPosition || specifiedPosition;\n  }\n\n  var boxPosition = new BoxPosition(styleBox),\n      cue = styleBox.cue,\n      linePos = computeLinePos(cue),\n      axis = [];\n\n  // If we have a line number to align the cue to.\n  if (cue.snapToLines) {\n    var size;\n    switch (cue.vertical) {\n    case \"\":\n      axis = [ \"+y\", \"-y\" ];\n      size = \"height\";\n      break;\n    case \"rl\":\n      axis = [ \"+x\", \"-x\" ];\n      size = \"width\";\n      break;\n    case \"lr\":\n      axis = [ \"-x\", \"+x\" ];\n      size = \"width\";\n      break;\n    }\n\n    var step = boxPosition.lineHeight,\n        position = step * Math.round(linePos),\n        maxPosition = containerBox[size] + step,\n        initialAxis = axis[0];\n\n    // If the specified intial position is greater then the max position then\n    // clamp the box to the amount of steps it would take for the box to\n    // reach the max position.\n    if (Math.abs(position) > maxPosition) {\n      position = position < 0 ? -1 : 1;\n      position *= Math.ceil(maxPosition / step) * step;\n    }\n\n    // If computed line position returns negative then line numbers are\n    // relative to the bottom of the video instead of the top. Therefore, we\n    // need to increase our initial position by the length or width of the\n    // video, depending on the writing direction, and reverse our axis directions.\n    if (linePos < 0) {\n      position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n      axis = axis.reverse();\n    }\n\n    // Move the box to the specified position. This may not be its best\n    // position.\n    boxPosition.move(initialAxis, position);\n\n  } else {\n    // If we have a percentage line value for the cue.\n    var calculatedPercentage = (boxPosition.lineHeight / containerBox.height) * 100;\n\n    switch (cue.lineAlign) {\n    case \"middle\":\n      linePos -= (calculatedPercentage / 2);\n      break;\n    case \"end\":\n      linePos -= calculatedPercentage;\n      break;\n    }\n\n    // Apply initial line position to the cue box.\n    switch (cue.vertical) {\n    case \"\":\n      styleBox.applyStyles({\n        top: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"rl\":\n      styleBox.applyStyles({\n        left: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"lr\":\n      styleBox.applyStyles({\n        right: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    }\n\n    axis = [ \"+y\", \"-x\", \"+x\", \"-y\" ];\n\n    // Get the box position again after we've applied the specified positioning\n    // to it.\n    boxPosition = new BoxPosition(styleBox);\n  }\n\n  var bestPosition = findBestPosition(boxPosition, axis);\n  styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n}\n\nfunction WebVTT() {\n  // Nothing\n}\n\n// Helper to allow strings to be decoded instead of the default binary utf8 data.\nWebVTT.StringDecoder = function() {\n  return {\n    decode: function(data) {\n      if (!data) {\n        return \"\";\n      }\n      if (typeof data !== \"string\") {\n        throw new Error(\"Error - expected string data.\");\n      }\n      return decodeURIComponent(encodeURIComponent(data));\n    }\n  };\n};\n\nWebVTT.convertCueToDOMTree = function(window, cuetext) {\n  if (!window || !cuetext) {\n    return null;\n  }\n  return parseContent(window, cuetext);\n};\n\nvar FONT_SIZE_PERCENT = 0.05;\nvar FONT_STYLE = \"sans-serif\";\nvar CUE_BACKGROUND_PADDING = \"1.5%\";\n\n// Runs the processing model over the cues and regions passed to it.\n// @param overlay A block level element (usually a div) that the computed cues\n//                and regions will be placed into.\nWebVTT.processCues = function(window, cues, overlay) {\n  if (!window || !cues || !overlay) {\n    return null;\n  }\n\n  // Remove all previous children.\n  while (overlay.firstChild) {\n    overlay.removeChild(overlay.firstChild);\n  }\n\n  var paddedOverlay = window.document.createElement(\"div\");\n  paddedOverlay.style.position = \"absolute\";\n  paddedOverlay.style.left = \"0\";\n  paddedOverlay.style.right = \"0\";\n  paddedOverlay.style.top = \"0\";\n  paddedOverlay.style.bottom = \"0\";\n  paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n  overlay.appendChild(paddedOverlay);\n\n  // Determine if we need to compute the display states of the cues. This could\n  // be the case if a cue's state has been changed since the last computation or\n  // if it has not been computed yet.\n  function shouldCompute(cues) {\n    for (var i = 0; i < cues.length; i++) {\n      if (cues[i].hasBeenReset || !cues[i].displayState) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  // We don't need to recompute the cues' display states. Just reuse them.\n  if (!shouldCompute(cues)) {\n    for (var i = 0; i < cues.length; i++) {\n      paddedOverlay.appendChild(cues[i].displayState);\n    }\n    return;\n  }\n\n  var boxPositions = [],\n      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n  var styleOptions = {\n    font: fontSize + \"px \" + FONT_STYLE\n  };\n\n  (function() {\n    var styleBox, cue;\n\n    for (var i = 0; i < cues.length; i++) {\n      cue = cues[i];\n\n      // Compute the intial position and styles of the cue div.\n      styleBox = new CueStyleBox(window, cue, styleOptions);\n      paddedOverlay.appendChild(styleBox.div);\n\n      // Move the cue div to it's correct line position.\n      moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);\n\n      // Remember the computed div so that we don't have to recompute it later\n      // if we don't have too.\n      cue.displayState = styleBox.div;\n\n      boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n    }\n  })();\n};\n\nWebVTT.Parser = function(window, vttjs, decoder) {\n  if (!decoder) {\n    decoder = vttjs;\n    vttjs = {};\n  }\n  if (!vttjs) {\n    vttjs = {};\n  }\n\n  this.window = window;\n  this.vttjs = vttjs;\n  this.state = \"INITIAL\";\n  this.buffer = \"\";\n  this.decoder = decoder || new TextDecoder(\"utf8\");\n  this.regionList = [];\n};\n\nWebVTT.Parser.prototype = {\n  // If the error is a ParsingError then report it to the consumer if\n  // possible. If it's not a ParsingError then throw it like normal.\n  reportOrThrowError: function(e) {\n    if (e instanceof ParsingError) {\n      this.onparsingerror && this.onparsingerror(e);\n    } else {\n      throw e;\n    }\n  },\n  parse: function (data) {\n    var self = this;\n\n    // If there is no data then we won't decode it, but will just try to parse\n    // whatever is in buffer already. This may occur in circumstances, for\n    // example when flush() is called.\n    if (data) {\n      // Try to decode the data that we received.\n      self.buffer += self.decoder.decode(data, {stream: true});\n    }\n\n    function collectNextLine() {\n      var buffer = self.buffer;\n      var pos = 0;\n      while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n        ++pos;\n      }\n      var line = buffer.substr(0, pos);\n      // Advance the buffer early in case we fail below.\n      if (buffer[pos] === '\\r') {\n        ++pos;\n      }\n      if (buffer[pos] === '\\n') {\n        ++pos;\n      }\n      self.buffer = buffer.substr(pos);\n      return line;\n    }\n\n    // 3.4 WebVTT region and WebVTT region settings syntax\n    function parseRegion(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function (k, v) {\n        switch (k) {\n        case \"id\":\n          settings.set(k, v);\n          break;\n        case \"width\":\n          settings.percent(k, v);\n          break;\n        case \"lines\":\n          settings.integer(k, v);\n          break;\n        case \"regionanchor\":\n        case \"viewportanchor\":\n          var xy = v.split(',');\n          if (xy.length !== 2) {\n            break;\n          }\n          // We have to make sure both x and y parse, so use a temporary\n          // settings object here.\n          var anchor = new Settings();\n          anchor.percent(\"x\", xy[0]);\n          anchor.percent(\"y\", xy[1]);\n          if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n            break;\n          }\n          settings.set(k + \"X\", anchor.get(\"x\"));\n          settings.set(k + \"Y\", anchor.get(\"y\"));\n          break;\n        case \"scroll\":\n          settings.alt(k, v, [\"up\"]);\n          break;\n        }\n      }, /=/, /\\s/);\n\n      // Create the region, using default values for any values that were not\n      // specified.\n      if (settings.has(\"id\")) {\n        var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n        region.width = settings.get(\"width\", 100);\n        region.lines = settings.get(\"lines\", 3);\n        region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n        region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n        region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n        region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n        region.scroll = settings.get(\"scroll\", \"\");\n        // Register the region.\n        self.onregion && self.onregion(region);\n        // Remember the VTTRegion for later in case we parse any VTTCues that\n        // reference it.\n        self.regionList.push({\n          id: settings.get(\"id\"),\n          region: region\n        });\n      }\n    }\n\n    // draft-pantos-http-live-streaming-20\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n    // 3.5 WebVTT\n    function parseTimestampMap(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function(k, v) {\n        switch(k) {\n        case \"MPEGT\":\n          settings.integer(k + 'S', v);\n          break;\n        case \"LOCA\":\n          settings.set(k + 'L', parseTimeStamp(v));\n          break;\n        }\n      }, /[^\\d]:/, /,/);\n\n      self.ontimestampmap && self.ontimestampmap({\n        \"MPEGTS\": settings.get(\"MPEGTS\"),\n        \"LOCAL\": settings.get(\"LOCAL\")\n      });\n    }\n\n    // 3.2 WebVTT metadata header syntax\n    function parseHeader(input) {\n      if (input.match(/X-TIMESTAMP-MAP/)) {\n        // This line contains HLS X-TIMESTAMP-MAP metadata\n        parseOptions(input, function(k, v) {\n          switch(k) {\n          case \"X-TIMESTAMP-MAP\":\n            parseTimestampMap(v);\n            break;\n          }\n        }, /=/);\n      } else {\n        parseOptions(input, function (k, v) {\n          switch (k) {\n          case \"Region\":\n            // 3.3 WebVTT region metadata header syntax\n            parseRegion(v);\n            break;\n          }\n        }, /:/);\n      }\n\n    }\n\n    // 5.1 WebVTT file parsing.\n    try {\n      var line;\n      if (self.state === \"INITIAL\") {\n        // We can't start parsing until we have the first line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        line = collectNextLine();\n\n        var m = line.match(/^WEBVTT([ \\t].*)?$/);\n        if (!m || !m[0]) {\n          throw new ParsingError(ParsingError.Errors.BadSignature);\n        }\n\n        self.state = \"HEADER\";\n      }\n\n      var alreadyCollectedLine = false;\n      while (self.buffer) {\n        // We can't parse a line until we have the full line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        if (!alreadyCollectedLine) {\n          line = collectNextLine();\n        } else {\n          alreadyCollectedLine = false;\n        }\n\n        switch (self.state) {\n        case \"HEADER\":\n          // 13-18 - Allow a header (metadata) under the WEBVTT line.\n          if (/:/.test(line)) {\n            parseHeader(line);\n          } else if (!line) {\n            // An empty line terminates the header and starts the body (cues).\n            self.state = \"ID\";\n          }\n          continue;\n        case \"NOTE\":\n          // Ignore NOTE blocks.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        case \"ID\":\n          // Check for the start of NOTE blocks.\n          if (/^NOTE($|[ \\t])/.test(line)) {\n            self.state = \"NOTE\";\n            break;\n          }\n          // 19-29 - Allow any number of line terminators, then initialize new cue values.\n          if (!line) {\n            continue;\n          }\n          self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n          self.state = \"CUE\";\n          // 30-39 - Check if self line contains an optional identifier or timing data.\n          if (line.indexOf(\"-->\") === -1) {\n            self.cue.id = line;\n            continue;\n          }\n          // Process line as start of a cue.\n          /*falls through*/\n        case \"CUE\":\n          // 40 - Collect cue timings and settings.\n          try {\n            parseCue(line, self.cue, self.regionList);\n          } catch (e) {\n            self.reportOrThrowError(e);\n            // In case of an error ignore rest of the cue.\n            self.cue = null;\n            self.state = \"BADCUE\";\n            continue;\n          }\n          self.state = \"CUETEXT\";\n          continue;\n        case \"CUETEXT\":\n          var hasSubstring = line.indexOf(\"-->\") !== -1;\n          // 34 - If we have an empty line then report the cue.\n          // 35 - If we have the special substring '-->' then report the cue,\n          // but do not collect the line as we need to process the current\n          // one as a new cue.\n          if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n            // We are done parsing self cue.\n            self.oncue && self.oncue(self.cue);\n            self.cue = null;\n            self.state = \"ID\";\n            continue;\n          }\n          if (self.cue.text) {\n            self.cue.text += \"\\n\";\n          }\n          self.cue.text += line;\n          continue;\n        case \"BADCUE\": // BADCUE\n          // 54-62 - Collect and discard the remaining cue.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        }\n      }\n    } catch (e) {\n      self.reportOrThrowError(e);\n\n      // If we are currently parsing a cue, report what we have.\n      if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n        self.oncue(self.cue);\n      }\n      self.cue = null;\n      // Enter BADWEBVTT state if header was not parsed correctly otherwise\n      // another exception occurred so enter BADCUE state.\n      self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n    }\n    return this;\n  },\n  flush: function () {\n    var self = this;\n    try {\n      // Finish decoding the stream.\n      self.buffer += self.decoder.decode();\n      // Synthesize the end of the current cue or region.\n      if (self.cue || self.state === \"HEADER\") {\n        self.buffer += \"\\n\\n\";\n        self.parse();\n      }\n      // If we've flushed, parsed, and we're still on the INITIAL state then\n      // that means we don't have enough of the stream to parse the first\n      // line.\n      if (self.state === \"INITIAL\") {\n        throw new ParsingError(ParsingError.Errors.BadSignature);\n      }\n    } catch(e) {\n      self.reportOrThrowError(e);\n    }\n    self.onflush && self.onflush();\n    return this;\n  }\n};\n\nmodule.exports = WebVTT;\n","/**\n * @file remove-cues-from-track.js\n */\n\n/**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nvar removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {\n  var i = undefined;\n  var cue = undefined;\n\n  if (!track) {\n    return;\n  }\n\n  if (!track.cues) {\n    return;\n  }\n\n  i = track.cues.length;\n\n  while (i--) {\n    cue = track.cues[i];\n\n    // Remove any overlapping cue\n    if (cue.startTime <= end && cue.endTime >= start) {\n      track.removeCue(cue);\n    }\n  }\n};\n\nexports[\"default\"] = removeCuesFromTrack;\nmodule.exports = exports[\"default\"];","'use strict';\nvar collection = require('../internals/collection');\nvar collectionStrong = require('../internals/collection-strong');\n\n// `Map` constructor\n// https://tc39.es/ecma262/#sec-map-objects\nmodule.exports = collection('Map', function (init) {\n  return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };\n}, collectionStrong);\n","var inherits = require('inherits')\nvar Hash = require('./hash')\nvar Buffer = require('safe-buffer').Buffer\n\nvar K = [\n  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,\n  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,\n  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,\n  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,\n  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,\n  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,\n  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,\n  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,\n  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,\n  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,\n  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,\n  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,\n  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,\n  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,\n  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,\n  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,\n  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,\n  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,\n  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,\n  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,\n  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,\n  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,\n  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,\n  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,\n  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,\n  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,\n  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,\n  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,\n  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,\n  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,\n  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,\n  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,\n  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,\n  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,\n  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,\n  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,\n  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,\n  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,\n  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,\n  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817\n]\n\nvar W = new Array(160)\n\nfunction Sha512 () {\n  this.init()\n  this._w = W\n\n  Hash.call(this, 128, 112)\n}\n\ninherits(Sha512, Hash)\n\nSha512.prototype.init = function () {\n  this._ah = 0x6a09e667\n  this._bh = 0xbb67ae85\n  this._ch = 0x3c6ef372\n  this._dh = 0xa54ff53a\n  this._eh = 0x510e527f\n  this._fh = 0x9b05688c\n  this._gh = 0x1f83d9ab\n  this._hh = 0x5be0cd19\n\n  this._al = 0xf3bcc908\n  this._bl = 0x84caa73b\n  this._cl = 0xfe94f82b\n  this._dl = 0x5f1d36f1\n  this._el = 0xade682d1\n  this._fl = 0x2b3e6c1f\n  this._gl = 0xfb41bd6b\n  this._hl = 0x137e2179\n\n  return this\n}\n\nfunction Ch (x, y, z) {\n  return z ^ (x & (y ^ z))\n}\n\nfunction maj (x, y, z) {\n  return (x & y) | (z & (x | y))\n}\n\nfunction sigma0 (x, xl) {\n  return (x >>> 28 | xl << 4) ^ (xl >>> 2 | x << 30) ^ (xl >>> 7 | x << 25)\n}\n\nfunction sigma1 (x, xl) {\n  return (x >>> 14 | xl << 18) ^ (x >>> 18 | xl << 14) ^ (xl >>> 9 | x << 23)\n}\n\nfunction Gamma0 (x, xl) {\n  return (x >>> 1 | xl << 31) ^ (x >>> 8 | xl << 24) ^ (x >>> 7)\n}\n\nfunction Gamma0l (x, xl) {\n  return (x >>> 1 | xl << 31) ^ (x >>> 8 | xl << 24) ^ (x >>> 7 | xl << 25)\n}\n\nfunction Gamma1 (x, xl) {\n  return (x >>> 19 | xl << 13) ^ (xl >>> 29 | x << 3) ^ (x >>> 6)\n}\n\nfunction Gamma1l (x, xl) {\n  return (x >>> 19 | xl << 13) ^ (xl >>> 29 | x << 3) ^ (x >>> 6 | xl << 26)\n}\n\nfunction getCarry (a, b) {\n  return (a >>> 0) < (b >>> 0) ? 1 : 0\n}\n\nSha512.prototype._update = function (M) {\n  var W = this._w\n\n  var ah = this._ah | 0\n  var bh = this._bh | 0\n  var ch = this._ch | 0\n  var dh = this._dh | 0\n  var eh = this._eh | 0\n  var fh = this._fh | 0\n  var gh = this._gh | 0\n  var hh = this._hh | 0\n\n  var al = this._al | 0\n  var bl = this._bl | 0\n  var cl = this._cl | 0\n  var dl = this._dl | 0\n  var el = this._el | 0\n  var fl = this._fl | 0\n  var gl = this._gl | 0\n  var hl = this._hl | 0\n\n  for (var i = 0; i < 32; i += 2) {\n    W[i] = M.readInt32BE(i * 4)\n    W[i + 1] = M.readInt32BE(i * 4 + 4)\n  }\n  for (; i < 160; i += 2) {\n    var xh = W[i - 15 * 2]\n    var xl = W[i - 15 * 2 + 1]\n    var gamma0 = Gamma0(xh, xl)\n    var gamma0l = Gamma0l(xl, xh)\n\n    xh = W[i - 2 * 2]\n    xl = W[i - 2 * 2 + 1]\n    var gamma1 = Gamma1(xh, xl)\n    var gamma1l = Gamma1l(xl, xh)\n\n    // W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16]\n    var Wi7h = W[i - 7 * 2]\n    var Wi7l = W[i - 7 * 2 + 1]\n\n    var Wi16h = W[i - 16 * 2]\n    var Wi16l = W[i - 16 * 2 + 1]\n\n    var Wil = (gamma0l + Wi7l) | 0\n    var Wih = (gamma0 + Wi7h + getCarry(Wil, gamma0l)) | 0\n    Wil = (Wil + gamma1l) | 0\n    Wih = (Wih + gamma1 + getCarry(Wil, gamma1l)) | 0\n    Wil = (Wil + Wi16l) | 0\n    Wih = (Wih + Wi16h + getCarry(Wil, Wi16l)) | 0\n\n    W[i] = Wih\n    W[i + 1] = Wil\n  }\n\n  for (var j = 0; j < 160; j += 2) {\n    Wih = W[j]\n    Wil = W[j + 1]\n\n    var majh = maj(ah, bh, ch)\n    var majl = maj(al, bl, cl)\n\n    var sigma0h = sigma0(ah, al)\n    var sigma0l = sigma0(al, ah)\n    var sigma1h = sigma1(eh, el)\n    var sigma1l = sigma1(el, eh)\n\n    // t1 = h + sigma1 + ch + K[j] + W[j]\n    var Kih = K[j]\n    var Kil = K[j + 1]\n\n    var chh = Ch(eh, fh, gh)\n    var chl = Ch(el, fl, gl)\n\n    var t1l = (hl + sigma1l) | 0\n    var t1h = (hh + sigma1h + getCarry(t1l, hl)) | 0\n    t1l = (t1l + chl) | 0\n    t1h = (t1h + chh + getCarry(t1l, chl)) | 0\n    t1l = (t1l + Kil) | 0\n    t1h = (t1h + Kih + getCarry(t1l, Kil)) | 0\n    t1l = (t1l + Wil) | 0\n    t1h = (t1h + Wih + getCarry(t1l, Wil)) | 0\n\n    // t2 = sigma0 + maj\n    var t2l = (sigma0l + majl) | 0\n    var t2h = (sigma0h + majh + getCarry(t2l, sigma0l)) | 0\n\n    hh = gh\n    hl = gl\n    gh = fh\n    gl = fl\n    fh = eh\n    fl = el\n    el = (dl + t1l) | 0\n    eh = (dh + t1h + getCarry(el, dl)) | 0\n    dh = ch\n    dl = cl\n    ch = bh\n    cl = bl\n    bh = ah\n    bl = al\n    al = (t1l + t2l) | 0\n    ah = (t1h + t2h + getCarry(al, t1l)) | 0\n  }\n\n  this._al = (this._al + al) | 0\n  this._bl = (this._bl + bl) | 0\n  this._cl = (this._cl + cl) | 0\n  this._dl = (this._dl + dl) | 0\n  this._el = (this._el + el) | 0\n  this._fl = (this._fl + fl) | 0\n  this._gl = (this._gl + gl) | 0\n  this._hl = (this._hl + hl) | 0\n\n  this._ah = (this._ah + ah + getCarry(this._al, al)) | 0\n  this._bh = (this._bh + bh + getCarry(this._bl, bl)) | 0\n  this._ch = (this._ch + ch + getCarry(this._cl, cl)) | 0\n  this._dh = (this._dh + dh + getCarry(this._dl, dl)) | 0\n  this._eh = (this._eh + eh + getCarry(this._el, el)) | 0\n  this._fh = (this._fh + fh + getCarry(this._fl, fl)) | 0\n  this._gh = (this._gh + gh + getCarry(this._gl, gl)) | 0\n  this._hh = (this._hh + hh + getCarry(this._hl, hl)) | 0\n}\n\nSha512.prototype._hash = function () {\n  var H = Buffer.allocUnsafe(64)\n\n  function writeInt64BE (h, l, offset) {\n    H.writeInt32BE(h, offset)\n    H.writeInt32BE(l, offset + 4)\n  }\n\n  writeInt64BE(this._ah, this._al, 0)\n  writeInt64BE(this._bh, this._bl, 8)\n  writeInt64BE(this._ch, this._cl, 16)\n  writeInt64BE(this._dh, this._dl, 24)\n  writeInt64BE(this._eh, this._el, 32)\n  writeInt64BE(this._fh, this._fl, 40)\n  writeInt64BE(this._gh, this._gl, 48)\n  writeInt64BE(this._hh, this._hl, 56)\n\n  return H\n}\n\nmodule.exports = Sha512\n","/*\n * pkcs7\n * https://github.com/brightcove/pkcs7\n *\n * Copyright (c) 2014 Brightcove\n * Licensed under the apache2 license.\n */\n\n'use strict';\n\nexports.pad = require('./pad.js');\nexports.unpad = require('./unpad.js');\n","var toInteger = require('../internals/to-integer');\n\nvar min = Math.min;\n\n// `ToLength` abstract operation\n// https://tc39.es/ecma262/#sec-tolength\nmodule.exports = function (argument) {\n  return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991\n};\n","var hasOwnProperty = {}.hasOwnProperty;\n\nmodule.exports = function (it, key) {\n  return hasOwnProperty.call(it, key);\n};\n","/**\n * mux.js\n *\n * Copyright (c) 2016 Brightcove\n * All rights reserved.\n *\n * Parse mpeg2 transport stream packets to extract basic timing information\n */\n'use strict';\n\nvar StreamTypes = require('../m2ts/stream-types.js');\nvar handleRollover = require('../m2ts/timestamp-rollover-stream.js').handleRollover;\nvar probe = {};\nprobe.ts = require('../m2ts/probe.js');\nprobe.aac = require('../aac/probe.js');\n\n\nvar\n  PES_TIMESCALE = 90000,\n  MP2T_PACKET_LENGTH = 188, // bytes\n  SYNC_BYTE = 0x47;\n\nvar isLikelyAacData = function(data) {\n  if ((data[0] === 'I'.charCodeAt(0)) &&\n      (data[1] === 'D'.charCodeAt(0)) &&\n      (data[2] === '3'.charCodeAt(0))) {\n    return true;\n  }\n  return false;\n};\n\n/**\n * walks through segment data looking for pat and pmt packets to parse out\n * program map table information\n */\nvar parsePsi_ = function(bytes, pmt) {\n  var\n    startIndex = 0,\n    endIndex = MP2T_PACKET_LENGTH,\n    packet, type;\n\n  while (endIndex < bytes.byteLength) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pat':\n          if (!pmt.pid) {\n            pmt.pid = probe.ts.parsePat(packet);\n          }\n          break;\n        case 'pmt':\n          if (!pmt.table) {\n            pmt.table = probe.ts.parsePmt(packet);\n          }\n          break;\n        default:\n          break;\n      }\n\n      // Found the pat and pmt, we can stop walking the segment\n      if (pmt.pid && pmt.table) {\n        return;\n      }\n\n      startIndex += MP2T_PACKET_LENGTH;\n      endIndex += MP2T_PACKET_LENGTH;\n      continue;\n    }\n\n    // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n    startIndex++;\n    endIndex++;\n  }\n};\n\n/**\n * walks through the segment data from the start and end to get timing information\n * for the first and last audio pes packets\n */\nvar parseAudioPes_ = function(bytes, pmt, result) {\n  var\n    startIndex = 0,\n    endIndex = MP2T_PACKET_LENGTH,\n    packet, type, pesType, pusi, parsed;\n\n  var endLoop = false;\n\n  // Start walking from start of segment to get first audio packet\n  while (endIndex < bytes.byteLength) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n          if (pesType === 'audio' && pusi) {\n            parsed = probe.ts.parsePesTime(packet);\n            if (parsed) {\n              parsed.type = 'audio';\n              result.audio.push(parsed);\n              endLoop = true;\n            }\n          }\n          break;\n        default:\n          break;\n      }\n\n      if (endLoop) {\n        break;\n      }\n\n      startIndex += MP2T_PACKET_LENGTH;\n      endIndex += MP2T_PACKET_LENGTH;\n      continue;\n    }\n\n    // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n    startIndex++;\n    endIndex++;\n  }\n\n  // Start walking from end of segment to get last audio packet\n  endIndex = bytes.byteLength;\n  startIndex = endIndex - MP2T_PACKET_LENGTH;\n  endLoop = false;\n  while (startIndex >= 0) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n          if (pesType === 'audio' && pusi) {\n            parsed = probe.ts.parsePesTime(packet);\n            if (parsed) {\n              parsed.type = 'audio';\n              result.audio.push(parsed);\n              endLoop = true;\n            }\n          }\n          break;\n        default:\n          break;\n      }\n\n      if (endLoop) {\n        break;\n      }\n\n      startIndex -= MP2T_PACKET_LENGTH;\n      endIndex -= MP2T_PACKET_LENGTH;\n      continue;\n    }\n\n    // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n    startIndex--;\n    endIndex--;\n  }\n};\n\n/**\n * walks through the segment data from the start and end to get timing information\n * for the first and last video pes packets as well as timing information for the first\n * key frame.\n */\nvar parseVideoPes_ = function(bytes, pmt, result) {\n  var\n    startIndex = 0,\n    endIndex = MP2T_PACKET_LENGTH,\n    packet, type, pesType, pusi, parsed, frame, i, pes;\n\n  var endLoop = false;\n\n  var currentFrame = {\n    data: [],\n    size: 0\n  };\n\n  // Start walking from start of segment to get first video packet\n  while (endIndex < bytes.byteLength) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n          if (pesType === 'video') {\n            if (pusi && !endLoop) {\n              parsed = probe.ts.parsePesTime(packet);\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n            }\n            if (!result.firstKeyFrame) {\n              if (pusi) {\n                if (currentFrame.size !== 0) {\n                  frame = new Uint8Array(currentFrame.size);\n                  i = 0;\n                  while (currentFrame.data.length) {\n                    pes = currentFrame.data.shift();\n                    frame.set(pes, i);\n                    i += pes.byteLength;\n                  }\n                  if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n                    result.firstKeyFrame = probe.ts.parsePesTime(frame);\n                    result.firstKeyFrame.type = 'video';\n                  }\n                  currentFrame.size = 0;\n                }\n              }\n              currentFrame.data.push(packet);\n              currentFrame.size += packet.byteLength;\n            }\n          }\n          break;\n        default:\n          break;\n      }\n\n      if (endLoop && result.firstKeyFrame) {\n        break;\n      }\n\n      startIndex += MP2T_PACKET_LENGTH;\n      endIndex += MP2T_PACKET_LENGTH;\n      continue;\n    }\n\n    // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n    startIndex++;\n    endIndex++;\n  }\n\n  // Start walking from end of segment to get last video packet\n  endIndex = bytes.byteLength;\n  startIndex = endIndex - MP2T_PACKET_LENGTH;\n  endLoop = false;\n  while (startIndex >= 0) {\n    // Look for a pair of start and end sync bytes in the data..\n    if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n      // We found a packet\n      packet = bytes.subarray(startIndex, endIndex);\n      type = probe.ts.parseType(packet, pmt.pid);\n\n      switch (type) {\n        case 'pes':\n          pesType = probe.ts.parsePesType(packet, pmt.table);\n          pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n          if (pesType === 'video' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n          }\n          break;\n        default:\n          break;\n      }\n\n      if (endLoop) {\n        break;\n      }\n\n      startIndex -= MP2T_PACKET_LENGTH;\n      endIndex -= MP2T_PACKET_LENGTH;\n      continue;\n    }\n\n    // If we get here, we have somehow become de-synchronized and we need to step\n    // forward one byte at a time until we find a pair of sync bytes that denote\n    // a packet\n    startIndex--;\n    endIndex--;\n  }\n};\n\n/**\n * Adjusts the timestamp information for the segment to account for\n * rollover and convert to seconds based on pes packet timescale (90khz clock)\n */\nvar adjustTimestamp_ = function(segmentInfo, baseTimestamp) {\n  if (segmentInfo.audio && segmentInfo.audio.length) {\n    var audioBaseTimestamp = baseTimestamp;\n    if (typeof audioBaseTimestamp === 'undefined') {\n      audioBaseTimestamp = segmentInfo.audio[0].dts;\n    }\n    segmentInfo.audio.forEach(function(info) {\n      info.dts = handleRollover(info.dts, audioBaseTimestamp);\n      info.pts = handleRollover(info.pts, audioBaseTimestamp);\n      // time in seconds\n      info.dtsTime = info.dts / PES_TIMESCALE;\n      info.ptsTime = info.pts / PES_TIMESCALE;\n    });\n  }\n\n  if (segmentInfo.video && segmentInfo.video.length) {\n    var videoBaseTimestamp = baseTimestamp;\n    if (typeof videoBaseTimestamp === 'undefined') {\n      videoBaseTimestamp = segmentInfo.video[0].dts;\n    }\n    segmentInfo.video.forEach(function(info) {\n      info.dts = handleRollover(info.dts, videoBaseTimestamp);\n      info.pts = handleRollover(info.pts, videoBaseTimestamp);\n      // time in seconds\n      info.dtsTime = info.dts / PES_TIMESCALE;\n      info.ptsTime = info.pts / PES_TIMESCALE;\n    });\n    if (segmentInfo.firstKeyFrame) {\n      var frame = segmentInfo.firstKeyFrame;\n      frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n      frame.pts = handleRollover(frame.pts, videoBaseTimestamp);\n      // time in seconds\n      frame.dtsTime = frame.dts / PES_TIMESCALE;\n      frame.ptsTime = frame.dts / PES_TIMESCALE;\n    }\n  }\n};\n\n/**\n * inspects the aac data stream for start and end time information\n */\nvar inspectAac_ = function(bytes) {\n  var\n    endLoop = false,\n    audioCount = 0,\n    sampleRate = null,\n    timestamp = null,\n    frameSize = 0,\n    byteIndex = 0,\n    packet;\n\n  while (bytes.length - byteIndex >= 3) {\n    var type = probe.aac.parseType(bytes, byteIndex);\n    switch (type) {\n      case 'timed-metadata':\n        // Exit early because we don't have enough to parse\n        // the ID3 tag header\n        if (bytes.length - byteIndex < 10) {\n          endLoop = true;\n          break;\n        }\n\n        frameSize = probe.aac.parseId3TagSize(bytes, byteIndex);\n\n        // Exit early if we don't have enough in the buffer\n        // to emit a full packet\n        if (frameSize > bytes.length) {\n          endLoop = true;\n          break;\n        }\n        if (timestamp === null) {\n          packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n          timestamp = probe.aac.parseAacTimestamp(packet);\n        }\n        byteIndex += frameSize;\n        break;\n      case 'audio':\n        // Exit early because we don't have enough to parse\n        // the ADTS frame header\n        if (bytes.length - byteIndex < 7) {\n          endLoop = true;\n          break;\n        }\n\n        frameSize = probe.aac.parseAdtsSize(bytes, byteIndex);\n\n        // Exit early if we don't have enough in the buffer\n        // to emit a full packet\n        if (frameSize > bytes.length) {\n          endLoop = true;\n          break;\n        }\n        if (sampleRate === null) {\n          packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n          sampleRate = probe.aac.parseSampleRate(packet);\n        }\n        audioCount++;\n        byteIndex += frameSize;\n        break;\n      default:\n        byteIndex++;\n        break;\n    }\n    if (endLoop) {\n      return null;\n    }\n  }\n  if (sampleRate === null || timestamp === null) {\n    return null;\n  }\n\n  var audioTimescale = PES_TIMESCALE / sampleRate;\n\n  var result = {\n    audio: [\n      {\n        type: 'audio',\n        dts: timestamp,\n        pts: timestamp\n      },\n      {\n        type: 'audio',\n        dts: timestamp + (audioCount * 1024 * audioTimescale),\n        pts: timestamp + (audioCount * 1024 * audioTimescale)\n      }\n    ]\n  };\n\n  return result;\n};\n\n/**\n * inspects the transport stream segment data for start and end time information\n * of the audio and video tracks (when present) as well as the first key frame's\n * start time.\n */\nvar inspectTs_ = function(bytes) {\n  var pmt = {\n    pid: null,\n    table: null\n  };\n\n  var result = {};\n\n  parsePsi_(bytes, pmt);\n\n  for (var pid in pmt.table) {\n    if (pmt.table.hasOwnProperty(pid)) {\n      var type = pmt.table[pid];\n      switch (type) {\n        case StreamTypes.H264_STREAM_TYPE:\n          result.video = [];\n          parseVideoPes_(bytes, pmt, result);\n          if (result.video.length === 0) {\n            delete result.video;\n          }\n          break;\n        case StreamTypes.ADTS_STREAM_TYPE:\n          result.audio = [];\n          parseAudioPes_(bytes, pmt, result);\n          if (result.audio.length === 0) {\n            delete result.audio;\n          }\n          break;\n        default:\n          break;\n      }\n    }\n  }\n  return result;\n};\n\n/**\n * Inspects segment byte data and returns an object with start and end timing information\n *\n * @param {Uint8Array} bytes The segment byte data\n * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n *  timestamps for rollover. This value must be in 90khz clock.\n * @return {Object} Object containing start and end frame timing info of segment.\n */\nvar inspect = function(bytes, baseTimestamp) {\n  var isAacData = isLikelyAacData(bytes);\n\n  var result;\n\n  if (isAacData) {\n    result = inspectAac_(bytes);\n  } else {\n    result = inspectTs_(bytes);\n  }\n\n  if (!result || (!result.audio && !result.video)) {\n    return null;\n  }\n\n  adjustTimestamp_(result, baseTimestamp);\n\n  return result;\n};\n\nmodule.exports = {\n  inspect: inspect\n};\n","var xor = require('buffer-xor')\n\nfunction getBlock (self) {\n  self._prev = self._cipher.encryptBlock(self._prev)\n  return self._prev\n}\n\nexports.encrypt = function (self, chunk) {\n  while (self._cache.length < chunk.length) {\n    self._cache = Buffer.concat([self._cache, getBlock(self)])\n  }\n\n  var pad = self._cache.slice(0, chunk.length)\n  self._cache = self._cache.slice(chunk.length)\n  return xor(chunk, pad)\n}\n","var Buffer = require('safe-buffer').Buffer\n\nfunction encryptByte (self, byteParam, decrypt) {\n  var pad\n  var i = -1\n  var len = 8\n  var out = 0\n  var bit, value\n  while (++i < len) {\n    pad = self._cipher.encryptBlock(self._prev)\n    bit = (byteParam & (1 << (7 - i))) ? 0x80 : 0\n    value = pad[0] ^ bit\n    out += ((value & 0x80) >> (i % 8))\n    self._prev = shiftIn(self._prev, decrypt ? bit : value)\n  }\n  return out\n}\n\nfunction shiftIn (buffer, value) {\n  var len = buffer.length\n  var i = -1\n  var out = Buffer.allocUnsafe(buffer.length)\n  buffer = Buffer.concat([buffer, Buffer.from([value])])\n\n  while (++i < len) {\n    out[i] = buffer[i] << 1 | buffer[i + 1] >> (7)\n  }\n\n  return out\n}\n\nexports.encrypt = function (self, chunk, decrypt) {\n  var len = chunk.length\n  var out = Buffer.allocUnsafe(len)\n  var i = -1\n\n  while (++i < len) {\n    out[i] = encryptByte(self, chunk[i], decrypt)\n  }\n\n  return out\n}\n","var BN = require('bn.js')\nvar Buffer = require('safe-buffer').Buffer\n\nfunction withPublic (paddedMsg, key) {\n  return Buffer.from(paddedMsg\n    .toRed(BN.mont(key.modulus))\n    .redPow(new BN(key.publicExponent))\n    .fromRed()\n    .toArray())\n}\n\nmodule.exports = withPublic\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar toLength = require('../internals/to-length');\nvar toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar advanceStringIndex = require('../internals/advance-string-index');\nvar getSubstitution = require('../internals/get-substitution');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\nvar max = Math.max;\nvar min = Math.min;\n\nvar maybeToString = function (it) {\n  return it === undefined ? it : String(it);\n};\n\n// @@replace logic\nfixRegExpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative, reason) {\n  var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE;\n  var REPLACE_KEEPS_$0 = reason.REPLACE_KEEPS_$0;\n  var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';\n\n  return [\n    // `String.prototype.replace` method\n    // https://tc39.es/ecma262/#sec-string.prototype.replace\n    function replace(searchValue, replaceValue) {\n      var O = requireObjectCoercible(this);\n      var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];\n      return replacer !== undefined\n        ? replacer.call(searchValue, O, replaceValue)\n        : nativeReplace.call(String(O), searchValue, replaceValue);\n    },\n    // `RegExp.prototype[@@replace]` method\n    // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace\n    function (regexp, replaceValue) {\n      if (\n        (!REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE && REPLACE_KEEPS_$0) ||\n        (typeof replaceValue === 'string' && replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1)\n      ) {\n        var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);\n        if (res.done) return res.value;\n      }\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      var functionalReplace = typeof replaceValue === 'function';\n      if (!functionalReplace) replaceValue = String(replaceValue);\n\n      var global = rx.global;\n      if (global) {\n        var fullUnicode = rx.unicode;\n        rx.lastIndex = 0;\n      }\n      var results = [];\n      while (true) {\n        var result = regExpExec(rx, S);\n        if (result === null) break;\n\n        results.push(result);\n        if (!global) break;\n\n        var matchStr = String(result[0]);\n        if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);\n      }\n\n      var accumulatedResult = '';\n      var nextSourcePosition = 0;\n      for (var i = 0; i < results.length; i++) {\n        result = results[i];\n\n        var matched = String(result[0]);\n        var position = max(min(toInteger(result.index), S.length), 0);\n        var captures = [];\n        // NOTE: This is equivalent to\n        //   captures = result.slice(1).map(maybeToString)\n        // but for some reason `nativeSlice.call(result, 1, result.length)` (called in\n        // the slice polyfill when slicing native arrays) \"doesn't work\" in safari 9 and\n        // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.\n        for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));\n        var namedCaptures = result.groups;\n        if (functionalReplace) {\n          var replacerArgs = [matched].concat(captures, position, S);\n          if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);\n          var replacement = String(replaceValue.apply(undefined, replacerArgs));\n        } else {\n          replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);\n        }\n        if (position >= nextSourcePosition) {\n          accumulatedResult += S.slice(nextSourcePosition, position) + replacement;\n          nextSourcePosition = position + matched.length;\n        }\n      }\n      return accumulatedResult + S.slice(nextSourcePosition);\n    }\n  ];\n});\n","module.exports = extend\n\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\n\nfunction extend() {\n    var target = {}\n\n    for (var i = 0; i < arguments.length; i++) {\n        var source = arguments[i]\n\n        for (var key in source) {\n            if (hasOwnProperty.call(source, key)) {\n                target[key] = source[key]\n            }\n        }\n    }\n\n    return target\n}\n","/**\n * @file vtt-segment-loader.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x3, _x4, _x5) { var _again = true; _function: while (_again) { var object = _x3, property = _x4, receiver = _x5; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x3 = parent; _x4 = property; _x5 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _segmentLoader = require('./segment-loader');\n\nvar _segmentLoader2 = _interopRequireDefault(_segmentLoader);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs = require('videojs-contrib-media-sources/es5/remove-cues-from-track.js');\n\nvar _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2 = _interopRequireDefault(_videojsContribMediaSourcesEs5RemoveCuesFromTrackJs);\n\nvar _binUtils = require('./bin-utils');\n\nvar VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(function (char) {\n  return char.charCodeAt(0);\n}));\n\nvar uintToString = function uintToString(uintArray) {\n  return String.fromCharCode.apply(null, uintArray);\n};\n\n/**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\nvar VTTSegmentLoader = (function (_SegmentLoader) {\n  _inherits(VTTSegmentLoader, _SegmentLoader);\n\n  function VTTSegmentLoader(settings) {\n    var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];\n\n    _classCallCheck(this, VTTSegmentLoader);\n\n    _get(Object.getPrototypeOf(VTTSegmentLoader.prototype), 'constructor', this).call(this, settings, options);\n\n    // SegmentLoader requires a MediaSource be specified or it will throw an error;\n    // however, VTTSegmentLoader has no need of a media source, so delete the reference\n    this.mediaSource_ = null;\n\n    this.subtitlesTrack_ = null;\n  }\n\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n\n  _createClass(VTTSegmentLoader, [{\n    key: 'buffered_',\n    value: function buffered_() {\n      if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues.length) {\n        return _videoJs2['default'].createTimeRanges();\n      }\n\n      var cues = this.subtitlesTrack_.cues;\n      var start = cues[0].startTime;\n      var end = cues[cues.length - 1].startTime;\n\n      return _videoJs2['default'].createTimeRanges([[start, end]]);\n    }\n\n    /**\n     * Gets and sets init segment for the provided map\n     *\n     * @param {Object} map\n     *        The map object representing the init segment to get or set\n     * @param {Boolean=} set\n     *        If true, the init segment for the provided map should be saved\n     * @return {Object}\n     *         map object for desired init segment\n     */\n  }, {\n    key: 'initSegment',\n    value: function initSegment(map) {\n      var set = arguments.length <= 1 || arguments[1] === undefined ? false : arguments[1];\n\n      if (!map) {\n        return null;\n      }\n\n      var id = (0, _binUtils.initSegmentId)(map);\n      var storedMap = this.initSegments_[id];\n\n      if (set && !storedMap && map.bytes) {\n        // append WebVTT line terminators to the media initialization segment if it exists\n        // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n        // requires two or more WebVTT line terminators between the WebVTT header and the\n        // rest of the file\n        var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n        var combinedSegment = new Uint8Array(combinedByteLength);\n\n        combinedSegment.set(map.bytes);\n        combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n\n        this.initSegments_[id] = storedMap = {\n          resolvedUri: map.resolvedUri,\n          byterange: map.byterange,\n          bytes: combinedSegment\n        };\n      }\n\n      return storedMap || map;\n    }\n\n    /**\n     * Returns true if all configuration required for loading is present, otherwise false.\n     *\n     * @return {Boolean} True if the all configuration is ready for loading\n     * @private\n     */\n  }, {\n    key: 'couldBeginLoading_',\n    value: function couldBeginLoading_() {\n      return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n    }\n\n    /**\n     * Once all the starting parameters have been specified, begin\n     * operation. This method should only be invoked from the INIT\n     * state.\n     *\n     * @private\n     */\n  }, {\n    key: 'init_',\n    value: function init_() {\n      this.state = 'READY';\n      this.resetEverything();\n      return this.monitorBuffer_();\n    }\n\n    /**\n     * Set a subtitle track on the segment loader to add subtitles to\n     *\n     * @param {TextTrack=} track\n     *        The text track to add loaded subtitles to\n     * @return {TextTrack}\n     *        Returns the subtitles track\n     */\n  }, {\n    key: 'track',\n    value: function track(_track) {\n      if (typeof _track === 'undefined') {\n        return this.subtitlesTrack_;\n      }\n\n      this.subtitlesTrack_ = _track;\n\n      // if we were unpaused but waiting for a sourceUpdater, start\n      // buffering now\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        this.init_();\n      }\n\n      return this.subtitlesTrack_;\n    }\n\n    /**\n     * Remove any data in the source buffer between start and end times\n     * @param {Number} start - the start time of the region to remove from the buffer\n     * @param {Number} end - the end time of the region to remove from the buffer\n     */\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      (0, _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2['default'])(start, end, this.subtitlesTrack_);\n    }\n\n    /**\n     * fill the buffer with segements unless the sourceBuffers are\n     * currently updating\n     *\n     * Note: this function should only ever be called by monitorBuffer_\n     * and never directly\n     *\n     * @private\n     */\n  }, {\n    key: 'fillBuffer_',\n    value: function fillBuffer_() {\n      var _this = this;\n\n      if (!this.syncPoint_) {\n        this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n      }\n\n      // see if we need to begin loading immediately\n      var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_);\n\n      segmentInfo = this.skipEmptySegments_(segmentInfo);\n\n      if (!segmentInfo) {\n        return;\n      }\n\n      if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n        // We don't have the timestamp offset that we need to sync subtitles.\n        // Rerun on a timestamp offset or user interaction.\n        var checkTimestampOffset = function checkTimestampOffset() {\n          _this.state = 'READY';\n          if (!_this.paused()) {\n            // if not paused, queue a buffer check as soon as possible\n            _this.monitorBuffer_();\n          }\n        };\n\n        this.syncController_.one('timestampoffset', checkTimestampOffset);\n        this.state = 'WAITING_ON_TIMELINE';\n        return;\n      }\n\n      this.loadSegment_(segmentInfo);\n    }\n\n    /**\n     * Prevents the segment loader from requesting segments we know contain no subtitles\n     * by walking forward until we find the next segment that we don't know whether it is\n     * empty or not.\n     *\n     * @param {Object} segmentInfo\n     *        a segment info object that describes the current segment\n     * @return {Object}\n     *         a segment info object that describes the current segment\n     */\n  }, {\n    key: 'skipEmptySegments_',\n    value: function skipEmptySegments_(segmentInfo) {\n      while (segmentInfo && segmentInfo.segment.empty) {\n        segmentInfo = this.generateSegmentInfo_(segmentInfo.playlist, segmentInfo.mediaIndex + 1, segmentInfo.startOfSegment + segmentInfo.duration, segmentInfo.isSyncRequest);\n      }\n      return segmentInfo;\n    }\n\n    /**\n     * append a decrypted segement to the SourceBuffer through a SourceUpdater\n     *\n     * @private\n     */\n  }, {\n    key: 'handleSegment_',\n    value: function handleSegment_() {\n      var _this2 = this;\n\n      if (!this.pendingSegment_ || !this.subtitlesTrack_) {\n        this.state = 'READY';\n        return;\n      }\n\n      this.state = 'APPENDING';\n\n      var segmentInfo = this.pendingSegment_;\n      var segment = segmentInfo.segment;\n\n      // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n      if (typeof _globalWindow2['default'].WebVTT !== 'function' && this.subtitlesTrack_ && this.subtitlesTrack_.tech_) {\n        var _ret = (function () {\n\n          var loadHandler = function loadHandler() {\n            _this2.handleSegment_();\n          };\n\n          _this2.state = 'WAITING_ON_VTTJS';\n          _this2.subtitlesTrack_.tech_.one('vttjsloaded', loadHandler);\n          _this2.subtitlesTrack_.tech_.one('vttjserror', function () {\n            _this2.subtitlesTrack_.tech_.off('vttjsloaded', loadHandler);\n            _this2.error({\n              message: 'Error loading vtt.js'\n            });\n            _this2.state = 'READY';\n            _this2.pause();\n            _this2.trigger('error');\n          });\n\n          return {\n            v: undefined\n          };\n        })();\n\n        if (typeof _ret === 'object') return _ret.v;\n      }\n\n      segment.requested = true;\n\n      try {\n        this.parseVTTCues_(segmentInfo);\n      } catch (e) {\n        this.error({\n          message: e.message\n        });\n        this.state = 'READY';\n        this.pause();\n        return this.trigger('error');\n      }\n\n      this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n\n      if (segmentInfo.isSyncRequest) {\n        this.trigger('syncinfoupdate');\n        this.pendingSegment_ = null;\n        this.state = 'READY';\n        return;\n      }\n\n      segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n\n      this.mediaSecondsLoaded += segment.duration;\n\n      if (segmentInfo.cues.length) {\n        // remove any overlapping cues to prevent doubling\n        this.remove(segmentInfo.cues[0].endTime, segmentInfo.cues[segmentInfo.cues.length - 1].endTime);\n      }\n\n      segmentInfo.cues.forEach(function (cue) {\n        _this2.subtitlesTrack_.addCue(cue);\n      });\n\n      this.handleUpdateEnd_();\n    }\n\n    /**\n     * Uses the WebVTT parser to parse the segment response\n     *\n     * @param {Object} segmentInfo\n     *        a segment info object that describes the current segment\n     * @private\n     */\n  }, {\n    key: 'parseVTTCues_',\n    value: function parseVTTCues_(segmentInfo) {\n      var decoder = undefined;\n      var decodeBytesToString = false;\n\n      if (typeof _globalWindow2['default'].TextDecoder === 'function') {\n        decoder = new _globalWindow2['default'].TextDecoder('utf8');\n      } else {\n        decoder = _globalWindow2['default'].WebVTT.StringDecoder();\n        decodeBytesToString = true;\n      }\n\n      var parser = new _globalWindow2['default'].WebVTT.Parser(_globalWindow2['default'], _globalWindow2['default'].vttjs, decoder);\n\n      segmentInfo.cues = [];\n      segmentInfo.timestampmap = { MPEGTS: 0, LOCAL: 0 };\n\n      parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n      parser.ontimestampmap = function (map) {\n        return segmentInfo.timestampmap = map;\n      };\n      parser.onparsingerror = function (error) {\n        _videoJs2['default'].log.warn('Error encountered when parsing cues: ' + error.message);\n      };\n\n      if (segmentInfo.segment.map) {\n        var mapData = segmentInfo.segment.map.bytes;\n\n        if (decodeBytesToString) {\n          mapData = uintToString(mapData);\n        }\n\n        parser.parse(mapData);\n      }\n\n      var segmentData = segmentInfo.bytes;\n\n      if (decodeBytesToString) {\n        segmentData = uintToString(segmentData);\n      }\n\n      parser.parse(segmentData);\n      parser.flush();\n    }\n\n    /**\n     * Updates the start and end times of any cues parsed by the WebVTT parser using\n     * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n     * from the SyncController\n     *\n     * @param {Object} segmentInfo\n     *        a segment info object that describes the current segment\n     * @param {Object} mappingObj\n     *        object containing a mapping from TS to media time\n     * @param {Object} playlist\n     *        the playlist object containing the segment\n     * @private\n     */\n  }, {\n    key: 'updateTimeMapping_',\n    value: function updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n      var segment = segmentInfo.segment;\n\n      if (!mappingObj) {\n        // If the sync controller does not have a mapping of TS to Media Time for the\n        // timeline, then we don't have enough information to update the cue\n        // start/end times\n        return;\n      }\n\n      if (!segmentInfo.cues.length) {\n        // If there are no cues, we also do not have enough information to figure out\n        // segment timing. Mark that the segment contains no cues so we don't re-request\n        // an empty segment.\n        segment.empty = true;\n        return;\n      }\n\n      var timestampmap = segmentInfo.timestampmap;\n      var diff = timestampmap.MPEGTS / 90000 - timestampmap.LOCAL + mappingObj.mapping;\n\n      segmentInfo.cues.forEach(function (cue) {\n        // First convert cue time to TS time using the timestamp-map provided within the vtt\n        cue.startTime += diff;\n        cue.endTime += diff;\n      });\n\n      if (!playlist.syncInfo) {\n        var firstStart = segmentInfo.cues[0].startTime;\n        var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n\n        playlist.syncInfo = {\n          mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n          time: Math.min(firstStart, lastStart - segment.duration)\n        };\n      }\n    }\n  }]);\n\n  return VTTSegmentLoader;\n})(_segmentLoader2['default']);\n\nexports['default'] = VTTSegmentLoader;\nmodule.exports = exports['default'];","/*!\n * vuex v4.0.0\n * (c) 2021 Evan You\n * @license MIT\n */\nimport { inject, watch, reactive } from 'vue';\n\nvar storeKey = 'store';\n\nfunction useStore (key) {\n  if ( key === void 0 ) key = null;\n\n  return inject(key !== null ? key : storeKey)\n}\n\nvar target = typeof window !== 'undefined'\n  ? window\n  : typeof global !== 'undefined'\n    ? global\n    : {};\nvar devtoolHook = target.__VUE_DEVTOOLS_GLOBAL_HOOK__;\n\nfunction devtoolPlugin (store) {\n  if (!devtoolHook) { return }\n\n  store._devtoolHook = devtoolHook;\n\n  devtoolHook.emit('vuex:init', store);\n\n  devtoolHook.on('vuex:travel-to-state', function (targetState) {\n    store.replaceState(targetState);\n  });\n\n  store.subscribe(function (mutation, state) {\n    devtoolHook.emit('vuex:mutation', mutation, state);\n  }, { prepend: true });\n\n  store.subscribeAction(function (action, state) {\n    devtoolHook.emit('vuex:action', action, state);\n  }, { prepend: true });\n}\n\n/**\n * Get the first item that pass the test\n * by second argument function\n *\n * @param {Array} list\n * @param {Function} f\n * @return {*}\n */\nfunction find (list, f) {\n  return list.filter(f)[0]\n}\n\n/**\n * Deep copy the given object considering circular structure.\n * This function caches all nested objects and its copies.\n * If it detects circular structure, use cached copy to avoid infinite loop.\n *\n * @param {*} obj\n * @param {Array<Object>} cache\n * @return {*}\n */\nfunction deepCopy (obj, cache) {\n  if ( cache === void 0 ) cache = [];\n\n  // just return if obj is immutable value\n  if (obj === null || typeof obj !== 'object') {\n    return obj\n  }\n\n  // if obj is hit, it is in circular structure\n  var hit = find(cache, function (c) { return c.original === obj; });\n  if (hit) {\n    return hit.copy\n  }\n\n  var copy = Array.isArray(obj) ? [] : {};\n  // put the copy into cache at first\n  // because we want to refer it in recursive deepCopy\n  cache.push({\n    original: obj,\n    copy: copy\n  });\n\n  Object.keys(obj).forEach(function (key) {\n    copy[key] = deepCopy(obj[key], cache);\n  });\n\n  return copy\n}\n\n/**\n * forEach for object\n */\nfunction forEachValue (obj, fn) {\n  Object.keys(obj).forEach(function (key) { return fn(obj[key], key); });\n}\n\nfunction isObject (obj) {\n  return obj !== null && typeof obj === 'object'\n}\n\nfunction isPromise (val) {\n  return val && typeof val.then === 'function'\n}\n\nfunction assert (condition, msg) {\n  if (!condition) { throw new Error((\"[vuex] \" + msg)) }\n}\n\nfunction partial (fn, arg) {\n  return function () {\n    return fn(arg)\n  }\n}\n\n// Base data struct for store's module, package with some attribute and method\nvar Module = function Module (rawModule, runtime) {\n  this.runtime = runtime;\n  // Store some children item\n  this._children = Object.create(null);\n  // Store the origin module object which passed by programmer\n  this._rawModule = rawModule;\n  var rawState = rawModule.state;\n\n  // Store the origin module's state\n  this.state = (typeof rawState === 'function' ? rawState() : rawState) || {};\n};\n\nvar prototypeAccessors = { namespaced: { configurable: true } };\n\nprototypeAccessors.namespaced.get = function () {\n  return !!this._rawModule.namespaced\n};\n\nModule.prototype.addChild = function addChild (key, module) {\n  this._children[key] = module;\n};\n\nModule.prototype.removeChild = function removeChild (key) {\n  delete this._children[key];\n};\n\nModule.prototype.getChild = function getChild (key) {\n  return this._children[key]\n};\n\nModule.prototype.hasChild = function hasChild (key) {\n  return key in this._children\n};\n\nModule.prototype.update = function update (rawModule) {\n  this._rawModule.namespaced = rawModule.namespaced;\n  if (rawModule.actions) {\n    this._rawModule.actions = rawModule.actions;\n  }\n  if (rawModule.mutations) {\n    this._rawModule.mutations = rawModule.mutations;\n  }\n  if (rawModule.getters) {\n    this._rawModule.getters = rawModule.getters;\n  }\n};\n\nModule.prototype.forEachChild = function forEachChild (fn) {\n  forEachValue(this._children, fn);\n};\n\nModule.prototype.forEachGetter = function forEachGetter (fn) {\n  if (this._rawModule.getters) {\n    forEachValue(this._rawModule.getters, fn);\n  }\n};\n\nModule.prototype.forEachAction = function forEachAction (fn) {\n  if (this._rawModule.actions) {\n    forEachValue(this._rawModule.actions, fn);\n  }\n};\n\nModule.prototype.forEachMutation = function forEachMutation (fn) {\n  if (this._rawModule.mutations) {\n    forEachValue(this._rawModule.mutations, fn);\n  }\n};\n\nObject.defineProperties( Module.prototype, prototypeAccessors );\n\nvar ModuleCollection = function ModuleCollection (rawRootModule) {\n  // register root module (Vuex.Store options)\n  this.register([], rawRootModule, false);\n};\n\nModuleCollection.prototype.get = function get (path) {\n  return path.reduce(function (module, key) {\n    return module.getChild(key)\n  }, this.root)\n};\n\nModuleCollection.prototype.getNamespace = function getNamespace (path) {\n  var module = this.root;\n  return path.reduce(function (namespace, key) {\n    module = module.getChild(key);\n    return namespace + (module.namespaced ? key + '/' : '')\n  }, '')\n};\n\nModuleCollection.prototype.update = function update$1 (rawRootModule) {\n  update([], this.root, rawRootModule);\n};\n\nModuleCollection.prototype.register = function register (path, rawModule, runtime) {\n    var this$1 = this;\n    if ( runtime === void 0 ) runtime = true;\n\n  {\n    assertRawModule(path, rawModule);\n  }\n\n  var newModule = new Module(rawModule, runtime);\n  if (path.length === 0) {\n    this.root = newModule;\n  } else {\n    var parent = this.get(path.slice(0, -1));\n    parent.addChild(path[path.length - 1], newModule);\n  }\n\n  // register nested modules\n  if (rawModule.modules) {\n    forEachValue(rawModule.modules, function (rawChildModule, key) {\n      this$1.register(path.concat(key), rawChildModule, runtime);\n    });\n  }\n};\n\nModuleCollection.prototype.unregister = function unregister (path) {\n  var parent = this.get(path.slice(0, -1));\n  var key = path[path.length - 1];\n  var child = parent.getChild(key);\n\n  if (!child) {\n    {\n      console.warn(\n        \"[vuex] trying to unregister module '\" + key + \"', which is \" +\n        \"not registered\"\n      );\n    }\n    return\n  }\n\n  if (!child.runtime) {\n    return\n  }\n\n  parent.removeChild(key);\n};\n\nModuleCollection.prototype.isRegistered = function isRegistered (path) {\n  var parent = this.get(path.slice(0, -1));\n  var key = path[path.length - 1];\n\n  if (parent) {\n    return parent.hasChild(key)\n  }\n\n  return false\n};\n\nfunction update (path, targetModule, newModule) {\n  {\n    assertRawModule(path, newModule);\n  }\n\n  // update target module\n  targetModule.update(newModule);\n\n  // update nested modules\n  if (newModule.modules) {\n    for (var key in newModule.modules) {\n      if (!targetModule.getChild(key)) {\n        {\n          console.warn(\n            \"[vuex] trying to add a new module '\" + key + \"' on hot reloading, \" +\n            'manual reload is needed'\n          );\n        }\n        return\n      }\n      update(\n        path.concat(key),\n        targetModule.getChild(key),\n        newModule.modules[key]\n      );\n    }\n  }\n}\n\nvar functionAssert = {\n  assert: function (value) { return typeof value === 'function'; },\n  expected: 'function'\n};\n\nvar objectAssert = {\n  assert: function (value) { return typeof value === 'function' ||\n    (typeof value === 'object' && typeof value.handler === 'function'); },\n  expected: 'function or object with \"handler\" function'\n};\n\nvar assertTypes = {\n  getters: functionAssert,\n  mutations: functionAssert,\n  actions: objectAssert\n};\n\nfunction assertRawModule (path, rawModule) {\n  Object.keys(assertTypes).forEach(function (key) {\n    if (!rawModule[key]) { return }\n\n    var assertOptions = assertTypes[key];\n\n    forEachValue(rawModule[key], function (value, type) {\n      assert(\n        assertOptions.assert(value),\n        makeAssertionMessage(path, key, type, value, assertOptions.expected)\n      );\n    });\n  });\n}\n\nfunction makeAssertionMessage (path, key, type, value, expected) {\n  var buf = key + \" should be \" + expected + \" but \\\"\" + key + \".\" + type + \"\\\"\";\n  if (path.length > 0) {\n    buf += \" in module \\\"\" + (path.join('.')) + \"\\\"\";\n  }\n  buf += \" is \" + (JSON.stringify(value)) + \".\";\n  return buf\n}\n\nfunction createStore (options) {\n  return new Store(options)\n}\n\nvar Store = function Store (options) {\n  var this$1 = this;\n  if ( options === void 0 ) options = {};\n\n  {\n    assert(typeof Promise !== 'undefined', \"vuex requires a Promise polyfill in this browser.\");\n    assert(this instanceof Store, \"store must be called with the new operator.\");\n  }\n\n  var plugins = options.plugins; if ( plugins === void 0 ) plugins = [];\n  var strict = options.strict; if ( strict === void 0 ) strict = false;\n\n  // store internal state\n  this._committing = false;\n  this._actions = Object.create(null);\n  this._actionSubscribers = [];\n  this._mutations = Object.create(null);\n  this._wrappedGetters = Object.create(null);\n  this._modules = new ModuleCollection(options);\n  this._modulesNamespaceMap = Object.create(null);\n  this._subscribers = [];\n  this._makeLocalGettersCache = Object.create(null);\n\n  // bind commit and dispatch to self\n  var store = this;\n  var ref = this;\n  var dispatch = ref.dispatch;\n  var commit = ref.commit;\n  this.dispatch = function boundDispatch (type, payload) {\n    return dispatch.call(store, type, payload)\n  };\n  this.commit = function boundCommit (type, payload, options) {\n    return commit.call(store, type, payload, options)\n  };\n\n  // strict mode\n  this.strict = strict;\n\n  var state = this._modules.root.state;\n\n  // init root module.\n  // this also recursively registers all sub-modules\n  // and collects all module getters inside this._wrappedGetters\n  installModule(this, state, [], this._modules.root);\n\n  // initialize the store state, which is responsible for the reactivity\n  // (also registers _wrappedGetters as computed properties)\n  resetStoreState(this, state);\n\n  // apply plugins\n  plugins.forEach(function (plugin) { return plugin(this$1); });\n\n  var useDevtools = options.devtools !== undefined ? options.devtools : /* Vue.config.devtools */ true;\n  if (useDevtools) {\n    devtoolPlugin(this);\n  }\n};\n\nvar prototypeAccessors$1 = { state: { configurable: true } };\n\nStore.prototype.install = function install (app, injectKey) {\n  app.provide(injectKey || storeKey, this);\n  app.config.globalProperties.$store = this;\n};\n\nprototypeAccessors$1.state.get = function () {\n  return this._state.data\n};\n\nprototypeAccessors$1.state.set = function (v) {\n  {\n    assert(false, \"use store.replaceState() to explicit replace store state.\");\n  }\n};\n\nStore.prototype.commit = function commit (_type, _payload, _options) {\n    var this$1 = this;\n\n  // check object-style commit\n  var ref = unifyObjectStyle(_type, _payload, _options);\n    var type = ref.type;\n    var payload = ref.payload;\n    var options = ref.options;\n\n  var mutation = { type: type, payload: payload };\n  var entry = this._mutations[type];\n  if (!entry) {\n    {\n      console.error((\"[vuex] unknown mutation type: \" + type));\n    }\n    return\n  }\n  this._withCommit(function () {\n    entry.forEach(function commitIterator (handler) {\n      handler(payload);\n    });\n  });\n\n  this._subscribers\n    .slice() // shallow copy to prevent iterator invalidation if subscriber synchronously calls unsubscribe\n    .forEach(function (sub) { return sub(mutation, this$1.state); });\n\n  if (\n    \n    options && options.silent\n  ) {\n    console.warn(\n      \"[vuex] mutation type: \" + type + \". Silent option has been removed. \" +\n      'Use the filter functionality in the vue-devtools'\n    );\n  }\n};\n\nStore.prototype.dispatch = function dispatch (_type, _payload) {\n    var this$1 = this;\n\n  // check object-style dispatch\n  var ref = unifyObjectStyle(_type, _payload);\n    var type = ref.type;\n    var payload = ref.payload;\n\n  var action = { type: type, payload: payload };\n  var entry = this._actions[type];\n  if (!entry) {\n    {\n      console.error((\"[vuex] unknown action type: \" + type));\n    }\n    return\n  }\n\n  try {\n    this._actionSubscribers\n      .slice() // shallow copy to prevent iterator invalidation if subscriber synchronously calls unsubscribe\n      .filter(function (sub) { return sub.before; })\n      .forEach(function (sub) { return sub.before(action, this$1.state); });\n  } catch (e) {\n    {\n      console.warn(\"[vuex] error in before action subscribers: \");\n      console.error(e);\n    }\n  }\n\n  var result = entry.length > 1\n    ? Promise.all(entry.map(function (handler) { return handler(payload); }))\n    : entry[0](payload);\n\n  return new Promise(function (resolve, reject) {\n    result.then(function (res) {\n      try {\n        this$1._actionSubscribers\n          .filter(function (sub) { return sub.after; })\n          .forEach(function (sub) { return sub.after(action, this$1.state); });\n      } catch (e) {\n        {\n          console.warn(\"[vuex] error in after action subscribers: \");\n          console.error(e);\n        }\n      }\n      resolve(res);\n    }, function (error) {\n      try {\n        this$1._actionSubscribers\n          .filter(function (sub) { return sub.error; })\n          .forEach(function (sub) { return sub.error(action, this$1.state, error); });\n      } catch (e) {\n        {\n          console.warn(\"[vuex] error in error action subscribers: \");\n          console.error(e);\n        }\n      }\n      reject(error);\n    });\n  })\n};\n\nStore.prototype.subscribe = function subscribe (fn, options) {\n  return genericSubscribe(fn, this._subscribers, options)\n};\n\nStore.prototype.subscribeAction = function subscribeAction (fn, options) {\n  var subs = typeof fn === 'function' ? { before: fn } : fn;\n  return genericSubscribe(subs, this._actionSubscribers, options)\n};\n\nStore.prototype.watch = function watch$1 (getter, cb, options) {\n    var this$1 = this;\n\n  {\n    assert(typeof getter === 'function', \"store.watch only accepts a function.\");\n  }\n  return watch(function () { return getter(this$1.state, this$1.getters); }, cb, Object.assign({}, options))\n};\n\nStore.prototype.replaceState = function replaceState (state) {\n    var this$1 = this;\n\n  this._withCommit(function () {\n    this$1._state.data = state;\n  });\n};\n\nStore.prototype.registerModule = function registerModule (path, rawModule, options) {\n    if ( options === void 0 ) options = {};\n\n  if (typeof path === 'string') { path = [path]; }\n\n  {\n    assert(Array.isArray(path), \"module path must be a string or an Array.\");\n    assert(path.length > 0, 'cannot register the root module by using registerModule.');\n  }\n\n  this._modules.register(path, rawModule);\n  installModule(this, this.state, path, this._modules.get(path), options.preserveState);\n  // reset store to update getters...\n  resetStoreState(this, this.state);\n};\n\nStore.prototype.unregisterModule = function unregisterModule (path) {\n    var this$1 = this;\n\n  if (typeof path === 'string') { path = [path]; }\n\n  {\n    assert(Array.isArray(path), \"module path must be a string or an Array.\");\n  }\n\n  this._modules.unregister(path);\n  this._withCommit(function () {\n    var parentState = getNestedState(this$1.state, path.slice(0, -1));\n    delete parentState[path[path.length - 1]];\n  });\n  resetStore(this);\n};\n\nStore.prototype.hasModule = function hasModule (path) {\n  if (typeof path === 'string') { path = [path]; }\n\n  {\n    assert(Array.isArray(path), \"module path must be a string or an Array.\");\n  }\n\n  return this._modules.isRegistered(path)\n};\n\nStore.prototype.hotUpdate = function hotUpdate (newOptions) {\n  this._modules.update(newOptions);\n  resetStore(this, true);\n};\n\nStore.prototype._withCommit = function _withCommit (fn) {\n  var committing = this._committing;\n  this._committing = true;\n  fn();\n  this._committing = committing;\n};\n\nObject.defineProperties( Store.prototype, prototypeAccessors$1 );\n\nfunction genericSubscribe (fn, subs, options) {\n  if (subs.indexOf(fn) < 0) {\n    options && options.prepend\n      ? subs.unshift(fn)\n      : subs.push(fn);\n  }\n  return function () {\n    var i = subs.indexOf(fn);\n    if (i > -1) {\n      subs.splice(i, 1);\n    }\n  }\n}\n\nfunction resetStore (store, hot) {\n  store._actions = Object.create(null);\n  store._mutations = Object.create(null);\n  store._wrappedGetters = Object.create(null);\n  store._modulesNamespaceMap = Object.create(null);\n  var state = store.state;\n  // init all modules\n  installModule(store, state, [], store._modules.root, true);\n  // reset state\n  resetStoreState(store, state, hot);\n}\n\nfunction resetStoreState (store, state, hot) {\n  var oldState = store._state;\n\n  // bind store public getters\n  store.getters = {};\n  // reset local getters cache\n  store._makeLocalGettersCache = Object.create(null);\n  var wrappedGetters = store._wrappedGetters;\n  var computedObj = {};\n  forEachValue(wrappedGetters, function (fn, key) {\n    // use computed to leverage its lazy-caching mechanism\n    // direct inline function use will lead to closure preserving oldState.\n    // using partial to return function with only arguments preserved in closure environment.\n    computedObj[key] = partial(fn, store);\n    Object.defineProperty(store.getters, key, {\n      // TODO: use `computed` when it's possible. at the moment we can't due to\n      // https://github.com/vuejs/vuex/pull/1883\n      get: function () { return computedObj[key](); },\n      enumerable: true // for local getters\n    });\n  });\n\n  store._state = reactive({\n    data: state\n  });\n\n  // enable strict mode for new state\n  if (store.strict) {\n    enableStrictMode(store);\n  }\n\n  if (oldState) {\n    if (hot) {\n      // dispatch changes in all subscribed watchers\n      // to force getter re-evaluation for hot reloading.\n      store._withCommit(function () {\n        oldState.data = null;\n      });\n    }\n  }\n}\n\nfunction installModule (store, rootState, path, module, hot) {\n  var isRoot = !path.length;\n  var namespace = store._modules.getNamespace(path);\n\n  // register in namespace map\n  if (module.namespaced) {\n    if (store._modulesNamespaceMap[namespace] && true) {\n      console.error((\"[vuex] duplicate namespace \" + namespace + \" for the namespaced module \" + (path.join('/'))));\n    }\n    store._modulesNamespaceMap[namespace] = module;\n  }\n\n  // set state\n  if (!isRoot && !hot) {\n    var parentState = getNestedState(rootState, path.slice(0, -1));\n    var moduleName = path[path.length - 1];\n    store._withCommit(function () {\n      {\n        if (moduleName in parentState) {\n          console.warn(\n            (\"[vuex] state field \\\"\" + moduleName + \"\\\" was overridden by a module with the same name at \\\"\" + (path.join('.')) + \"\\\"\")\n          );\n        }\n      }\n      parentState[moduleName] = module.state;\n    });\n  }\n\n  var local = module.context = makeLocalContext(store, namespace, path);\n\n  module.forEachMutation(function (mutation, key) {\n    var namespacedType = namespace + key;\n    registerMutation(store, namespacedType, mutation, local);\n  });\n\n  module.forEachAction(function (action, key) {\n    var type = action.root ? key : namespace + key;\n    var handler = action.handler || action;\n    registerAction(store, type, handler, local);\n  });\n\n  module.forEachGetter(function (getter, key) {\n    var namespacedType = namespace + key;\n    registerGetter(store, namespacedType, getter, local);\n  });\n\n  module.forEachChild(function (child, key) {\n    installModule(store, rootState, path.concat(key), child, hot);\n  });\n}\n\n/**\n * make localized dispatch, commit, getters and state\n * if there is no namespace, just use root ones\n */\nfunction makeLocalContext (store, namespace, path) {\n  var noNamespace = namespace === '';\n\n  var local = {\n    dispatch: noNamespace ? store.dispatch : function (_type, _payload, _options) {\n      var args = unifyObjectStyle(_type, _payload, _options);\n      var payload = args.payload;\n      var options = args.options;\n      var type = args.type;\n\n      if (!options || !options.root) {\n        type = namespace + type;\n        if ( !store._actions[type]) {\n          console.error((\"[vuex] unknown local action type: \" + (args.type) + \", global type: \" + type));\n          return\n        }\n      }\n\n      return store.dispatch(type, payload)\n    },\n\n    commit: noNamespace ? store.commit : function (_type, _payload, _options) {\n      var args = unifyObjectStyle(_type, _payload, _options);\n      var payload = args.payload;\n      var options = args.options;\n      var type = args.type;\n\n      if (!options || !options.root) {\n        type = namespace + type;\n        if ( !store._mutations[type]) {\n          console.error((\"[vuex] unknown local mutation type: \" + (args.type) + \", global type: \" + type));\n          return\n        }\n      }\n\n      store.commit(type, payload, options);\n    }\n  };\n\n  // getters and state object must be gotten lazily\n  // because they will be changed by state update\n  Object.defineProperties(local, {\n    getters: {\n      get: noNamespace\n        ? function () { return store.getters; }\n        : function () { return makeLocalGetters(store, namespace); }\n    },\n    state: {\n      get: function () { return getNestedState(store.state, path); }\n    }\n  });\n\n  return local\n}\n\nfunction makeLocalGetters (store, namespace) {\n  if (!store._makeLocalGettersCache[namespace]) {\n    var gettersProxy = {};\n    var splitPos = namespace.length;\n    Object.keys(store.getters).forEach(function (type) {\n      // skip if the target getter is not match this namespace\n      if (type.slice(0, splitPos) !== namespace) { return }\n\n      // extract local getter type\n      var localType = type.slice(splitPos);\n\n      // Add a port to the getters proxy.\n      // Define as getter property because\n      // we do not want to evaluate the getters in this time.\n      Object.defineProperty(gettersProxy, localType, {\n        get: function () { return store.getters[type]; },\n        enumerable: true\n      });\n    });\n    store._makeLocalGettersCache[namespace] = gettersProxy;\n  }\n\n  return store._makeLocalGettersCache[namespace]\n}\n\nfunction registerMutation (store, type, handler, local) {\n  var entry = store._mutations[type] || (store._mutations[type] = []);\n  entry.push(function wrappedMutationHandler (payload) {\n    handler.call(store, local.state, payload);\n  });\n}\n\nfunction registerAction (store, type, handler, local) {\n  var entry = store._actions[type] || (store._actions[type] = []);\n  entry.push(function wrappedActionHandler (payload) {\n    var res = handler.call(store, {\n      dispatch: local.dispatch,\n      commit: local.commit,\n      getters: local.getters,\n      state: local.state,\n      rootGetters: store.getters,\n      rootState: store.state\n    }, payload);\n    if (!isPromise(res)) {\n      res = Promise.resolve(res);\n    }\n    if (store._devtoolHook) {\n      return res.catch(function (err) {\n        store._devtoolHook.emit('vuex:error', err);\n        throw err\n      })\n    } else {\n      return res\n    }\n  });\n}\n\nfunction registerGetter (store, type, rawGetter, local) {\n  if (store._wrappedGetters[type]) {\n    {\n      console.error((\"[vuex] duplicate getter key: \" + type));\n    }\n    return\n  }\n  store._wrappedGetters[type] = function wrappedGetter (store) {\n    return rawGetter(\n      local.state, // local state\n      local.getters, // local getters\n      store.state, // root state\n      store.getters // root getters\n    )\n  };\n}\n\nfunction enableStrictMode (store) {\n  watch(function () { return store._state.data; }, function () {\n    {\n      assert(store._committing, \"do not mutate vuex store state outside mutation handlers.\");\n    }\n  }, { deep: true, flush: 'sync' });\n}\n\nfunction getNestedState (state, path) {\n  return path.reduce(function (state, key) { return state[key]; }, state)\n}\n\nfunction unifyObjectStyle (type, payload, options) {\n  if (isObject(type) && type.type) {\n    options = payload;\n    payload = type;\n    type = type.type;\n  }\n\n  {\n    assert(typeof type === 'string', (\"expects string as the type, but found \" + (typeof type) + \".\"));\n  }\n\n  return { type: type, payload: payload, options: options }\n}\n\n/**\n * Reduce the code which written in Vue.js for getting the state.\n * @param {String} [namespace] - Module's namespace\n * @param {Object|Array} states # Object's item can be a function which accept state and getters for param, you can do something for state and getters in it.\n * @param {Object}\n */\nvar mapState = normalizeNamespace(function (namespace, states) {\n  var res = {};\n  if ( !isValidMap(states)) {\n    console.error('[vuex] mapState: mapper parameter must be either an Array or an Object');\n  }\n  normalizeMap(states).forEach(function (ref) {\n    var key = ref.key;\n    var val = ref.val;\n\n    res[key] = function mappedState () {\n      var state = this.$store.state;\n      var getters = this.$store.getters;\n      if (namespace) {\n        var module = getModuleByNamespace(this.$store, 'mapState', namespace);\n        if (!module) {\n          return\n        }\n        state = module.context.state;\n        getters = module.context.getters;\n      }\n      return typeof val === 'function'\n        ? val.call(this, state, getters)\n        : state[val]\n    };\n    // mark vuex getter for devtools\n    res[key].vuex = true;\n  });\n  return res\n});\n\n/**\n * Reduce the code which written in Vue.js for committing the mutation\n * @param {String} [namespace] - Module's namespace\n * @param {Object|Array} mutations # Object's item can be a function which accept `commit` function as the first param, it can accept another params. You can commit mutation and do any other things in this function. specially, You need to pass anthor params from the mapped function.\n * @return {Object}\n */\nvar mapMutations = normalizeNamespace(function (namespace, mutations) {\n  var res = {};\n  if ( !isValidMap(mutations)) {\n    console.error('[vuex] mapMutations: mapper parameter must be either an Array or an Object');\n  }\n  normalizeMap(mutations).forEach(function (ref) {\n    var key = ref.key;\n    var val = ref.val;\n\n    res[key] = function mappedMutation () {\n      var args = [], len = arguments.length;\n      while ( len-- ) args[ len ] = arguments[ len ];\n\n      // Get the commit method from store\n      var commit = this.$store.commit;\n      if (namespace) {\n        var module = getModuleByNamespace(this.$store, 'mapMutations', namespace);\n        if (!module) {\n          return\n        }\n        commit = module.context.commit;\n      }\n      return typeof val === 'function'\n        ? val.apply(this, [commit].concat(args))\n        : commit.apply(this.$store, [val].concat(args))\n    };\n  });\n  return res\n});\n\n/**\n * Reduce the code which written in Vue.js for getting the getters\n * @param {String} [namespace] - Module's namespace\n * @param {Object|Array} getters\n * @return {Object}\n */\nvar mapGetters = normalizeNamespace(function (namespace, getters) {\n  var res = {};\n  if ( !isValidMap(getters)) {\n    console.error('[vuex] mapGetters: mapper parameter must be either an Array or an Object');\n  }\n  normalizeMap(getters).forEach(function (ref) {\n    var key = ref.key;\n    var val = ref.val;\n\n    // The namespace has been mutated by normalizeNamespace\n    val = namespace + val;\n    res[key] = function mappedGetter () {\n      if (namespace && !getModuleByNamespace(this.$store, 'mapGetters', namespace)) {\n        return\n      }\n      if ( !(val in this.$store.getters)) {\n        console.error((\"[vuex] unknown getter: \" + val));\n        return\n      }\n      return this.$store.getters[val]\n    };\n    // mark vuex getter for devtools\n    res[key].vuex = true;\n  });\n  return res\n});\n\n/**\n * Reduce the code which written in Vue.js for dispatch the action\n * @param {String} [namespace] - Module's namespace\n * @param {Object|Array} actions # Object's item can be a function which accept `dispatch` function as the first param, it can accept anthor params. You can dispatch action and do any other things in this function. specially, You need to pass anthor params from the mapped function.\n * @return {Object}\n */\nvar mapActions = normalizeNamespace(function (namespace, actions) {\n  var res = {};\n  if ( !isValidMap(actions)) {\n    console.error('[vuex] mapActions: mapper parameter must be either an Array or an Object');\n  }\n  normalizeMap(actions).forEach(function (ref) {\n    var key = ref.key;\n    var val = ref.val;\n\n    res[key] = function mappedAction () {\n      var args = [], len = arguments.length;\n      while ( len-- ) args[ len ] = arguments[ len ];\n\n      // get dispatch function from store\n      var dispatch = this.$store.dispatch;\n      if (namespace) {\n        var module = getModuleByNamespace(this.$store, 'mapActions', namespace);\n        if (!module) {\n          return\n        }\n        dispatch = module.context.dispatch;\n      }\n      return typeof val === 'function'\n        ? val.apply(this, [dispatch].concat(args))\n        : dispatch.apply(this.$store, [val].concat(args))\n    };\n  });\n  return res\n});\n\n/**\n * Rebinding namespace param for mapXXX function in special scoped, and return them by simple object\n * @param {String} namespace\n * @return {Object}\n */\nvar createNamespacedHelpers = function (namespace) { return ({\n  mapState: mapState.bind(null, namespace),\n  mapGetters: mapGetters.bind(null, namespace),\n  mapMutations: mapMutations.bind(null, namespace),\n  mapActions: mapActions.bind(null, namespace)\n}); };\n\n/**\n * Normalize the map\n * normalizeMap([1, 2, 3]) => [ { key: 1, val: 1 }, { key: 2, val: 2 }, { key: 3, val: 3 } ]\n * normalizeMap({a: 1, b: 2, c: 3}) => [ { key: 'a', val: 1 }, { key: 'b', val: 2 }, { key: 'c', val: 3 } ]\n * @param {Array|Object} map\n * @return {Object}\n */\nfunction normalizeMap (map) {\n  if (!isValidMap(map)) {\n    return []\n  }\n  return Array.isArray(map)\n    ? map.map(function (key) { return ({ key: key, val: key }); })\n    : Object.keys(map).map(function (key) { return ({ key: key, val: map[key] }); })\n}\n\n/**\n * Validate whether given map is valid or not\n * @param {*} map\n * @return {Boolean}\n */\nfunction isValidMap (map) {\n  return Array.isArray(map) || isObject(map)\n}\n\n/**\n * Return a function expect two param contains namespace and map. it will normalize the namespace and then the param's function will handle the new namespace and the map.\n * @param {Function} fn\n * @return {Function}\n */\nfunction normalizeNamespace (fn) {\n  return function (namespace, map) {\n    if (typeof namespace !== 'string') {\n      map = namespace;\n      namespace = '';\n    } else if (namespace.charAt(namespace.length - 1) !== '/') {\n      namespace += '/';\n    }\n    return fn(namespace, map)\n  }\n}\n\n/**\n * Search a special module from store by namespace. if module not exist, print error message.\n * @param {Object} store\n * @param {String} helper\n * @param {String} namespace\n * @return {Object}\n */\nfunction getModuleByNamespace (store, helper, namespace) {\n  var module = store._modulesNamespaceMap[namespace];\n  if ( !module) {\n    console.error((\"[vuex] module namespace not found in \" + helper + \"(): \" + namespace));\n  }\n  return module\n}\n\n// Credits: borrowed code from fcomb/redux-logger\n\nfunction createLogger (ref) {\n  if ( ref === void 0 ) ref = {};\n  var collapsed = ref.collapsed; if ( collapsed === void 0 ) collapsed = true;\n  var filter = ref.filter; if ( filter === void 0 ) filter = function (mutation, stateBefore, stateAfter) { return true; };\n  var transformer = ref.transformer; if ( transformer === void 0 ) transformer = function (state) { return state; };\n  var mutationTransformer = ref.mutationTransformer; if ( mutationTransformer === void 0 ) mutationTransformer = function (mut) { return mut; };\n  var actionFilter = ref.actionFilter; if ( actionFilter === void 0 ) actionFilter = function (action, state) { return true; };\n  var actionTransformer = ref.actionTransformer; if ( actionTransformer === void 0 ) actionTransformer = function (act) { return act; };\n  var logMutations = ref.logMutations; if ( logMutations === void 0 ) logMutations = true;\n  var logActions = ref.logActions; if ( logActions === void 0 ) logActions = true;\n  var logger = ref.logger; if ( logger === void 0 ) logger = console;\n\n  return function (store) {\n    var prevState = deepCopy(store.state);\n\n    if (typeof logger === 'undefined') {\n      return\n    }\n\n    if (logMutations) {\n      store.subscribe(function (mutation, state) {\n        var nextState = deepCopy(state);\n\n        if (filter(mutation, prevState, nextState)) {\n          var formattedTime = getFormattedTime();\n          var formattedMutation = mutationTransformer(mutation);\n          var message = \"mutation \" + (mutation.type) + formattedTime;\n\n          startMessage(logger, message, collapsed);\n          logger.log('%c prev state', 'color: #9E9E9E; font-weight: bold', transformer(prevState));\n          logger.log('%c mutation', 'color: #03A9F4; font-weight: bold', formattedMutation);\n          logger.log('%c next state', 'color: #4CAF50; font-weight: bold', transformer(nextState));\n          endMessage(logger);\n        }\n\n        prevState = nextState;\n      });\n    }\n\n    if (logActions) {\n      store.subscribeAction(function (action, state) {\n        if (actionFilter(action, state)) {\n          var formattedTime = getFormattedTime();\n          var formattedAction = actionTransformer(action);\n          var message = \"action \" + (action.type) + formattedTime;\n\n          startMessage(logger, message, collapsed);\n          logger.log('%c action', 'color: #03A9F4; font-weight: bold', formattedAction);\n          endMessage(logger);\n        }\n      });\n    }\n  }\n}\n\nfunction startMessage (logger, message, collapsed) {\n  var startMessage = collapsed\n    ? logger.groupCollapsed\n    : logger.group;\n\n  // render\n  try {\n    startMessage.call(logger, message);\n  } catch (e) {\n    logger.log(message);\n  }\n}\n\nfunction endMessage (logger) {\n  try {\n    logger.groupEnd();\n  } catch (e) {\n    logger.log('—— log end ——');\n  }\n}\n\nfunction getFormattedTime () {\n  var time = new Date();\n  return (\" @ \" + (pad(time.getHours(), 2)) + \":\" + (pad(time.getMinutes(), 2)) + \":\" + (pad(time.getSeconds(), 2)) + \".\" + (pad(time.getMilliseconds(), 3)))\n}\n\nfunction repeat (str, times) {\n  return (new Array(times + 1)).join(str)\n}\n\nfunction pad (num, maxLength) {\n  return repeat('0', maxLength - num.toString().length) + num\n}\n\nvar index = {\n  version: '4.0.0',\n  Store: Store,\n  storeKey: storeKey,\n  createStore: createStore,\n  useStore: useStore,\n  mapState: mapState,\n  mapMutations: mapMutations,\n  mapGetters: mapGetters,\n  mapActions: mapActions,\n  createNamespacedHelpers: createNamespacedHelpers,\n  createLogger: createLogger\n};\n\nexport default index;\nexport { Store, createLogger, createNamespacedHelpers, createStore, mapActions, mapGetters, mapMutations, mapState, storeKey, useStore };\n","export default function _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}","import defineProperty from \"./defineProperty.js\";\n\nfunction ownKeys(object, enumerableOnly) {\n  var keys = Object.keys(object);\n\n  if (Object.getOwnPropertySymbols) {\n    var symbols = Object.getOwnPropertySymbols(object);\n    if (enumerableOnly) symbols = symbols.filter(function (sym) {\n      return Object.getOwnPropertyDescriptor(object, sym).enumerable;\n    });\n    keys.push.apply(keys, symbols);\n  }\n\n  return keys;\n}\n\nexport default function _objectSpread2(target) {\n  for (var i = 1; i < arguments.length; i++) {\n    var source = arguments[i] != null ? arguments[i] : {};\n\n    if (i % 2) {\n      ownKeys(Object(source), true).forEach(function (key) {\n        defineProperty(target, key, source[key]);\n      });\n    } else if (Object.getOwnPropertyDescriptors) {\n      Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n    } else {\n      ownKeys(Object(source)).forEach(function (key) {\n        Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\n      });\n    }\n  }\n\n  return target;\n}","var setPrototypeOf = require(\"./setPrototypeOf.js\");\n\nfunction _inheritsLoose(subClass, superClass) {\n  subClass.prototype = Object.create(superClass.prototype);\n  subClass.prototype.constructor = subClass;\n  setPrototypeOf(subClass, superClass);\n}\n\nmodule.exports = _inheritsLoose;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","var BN = require('bn.js');\nvar MillerRabin = require('miller-rabin');\nvar millerRabin = new MillerRabin();\nvar TWENTYFOUR = new BN(24);\nvar ELEVEN = new BN(11);\nvar TEN = new BN(10);\nvar THREE = new BN(3);\nvar SEVEN = new BN(7);\nvar primes = require('./generatePrime');\nvar randomBytes = require('randombytes');\nmodule.exports = DH;\n\nfunction setPublicKey(pub, enc) {\n  enc = enc || 'utf8';\n  if (!Buffer.isBuffer(pub)) {\n    pub = new Buffer(pub, enc);\n  }\n  this._pub = new BN(pub);\n  return this;\n}\n\nfunction setPrivateKey(priv, enc) {\n  enc = enc || 'utf8';\n  if (!Buffer.isBuffer(priv)) {\n    priv = new Buffer(priv, enc);\n  }\n  this._priv = new BN(priv);\n  return this;\n}\n\nvar primeCache = {};\nfunction checkPrime(prime, generator) {\n  var gen = generator.toString('hex');\n  var hex = [gen, prime.toString(16)].join('_');\n  if (hex in primeCache) {\n    return primeCache[hex];\n  }\n  var error = 0;\n\n  if (prime.isEven() ||\n    !primes.simpleSieve ||\n    !primes.fermatTest(prime) ||\n    !millerRabin.test(prime)) {\n    //not a prime so +1\n    error += 1;\n\n    if (gen === '02' || gen === '05') {\n      // we'd be able to check the generator\n      // it would fail so +8\n      error += 8;\n    } else {\n      //we wouldn't be able to test the generator\n      // so +4\n      error += 4;\n    }\n    primeCache[hex] = error;\n    return error;\n  }\n  if (!millerRabin.test(prime.shrn(1))) {\n    //not a safe prime\n    error += 2;\n  }\n  var rem;\n  switch (gen) {\n    case '02':\n      if (prime.mod(TWENTYFOUR).cmp(ELEVEN)) {\n        // unsuidable generator\n        error += 8;\n      }\n      break;\n    case '05':\n      rem = prime.mod(TEN);\n      if (rem.cmp(THREE) && rem.cmp(SEVEN)) {\n        // prime mod 10 needs to equal 3 or 7\n        error += 8;\n      }\n      break;\n    default:\n      error += 4;\n  }\n  primeCache[hex] = error;\n  return error;\n}\n\nfunction DH(prime, generator, malleable) {\n  this.setGenerator(generator);\n  this.__prime = new BN(prime);\n  this._prime = BN.mont(this.__prime);\n  this._primeLen = prime.length;\n  this._pub = undefined;\n  this._priv = undefined;\n  this._primeCode = undefined;\n  if (malleable) {\n    this.setPublicKey = setPublicKey;\n    this.setPrivateKey = setPrivateKey;\n  } else {\n    this._primeCode = 8;\n  }\n}\nObject.defineProperty(DH.prototype, 'verifyError', {\n  enumerable: true,\n  get: function () {\n    if (typeof this._primeCode !== 'number') {\n      this._primeCode = checkPrime(this.__prime, this.__gen);\n    }\n    return this._primeCode;\n  }\n});\nDH.prototype.generateKeys = function () {\n  if (!this._priv) {\n    this._priv = new BN(randomBytes(this._primeLen));\n  }\n  this._pub = this._gen.toRed(this._prime).redPow(this._priv).fromRed();\n  return this.getPublicKey();\n};\n\nDH.prototype.computeSecret = function (other) {\n  other = new BN(other);\n  other = other.toRed(this._prime);\n  var secret = other.redPow(this._priv).fromRed();\n  var out = new Buffer(secret.toArray());\n  var prime = this.getPrime();\n  if (out.length < prime.length) {\n    var front = new Buffer(prime.length - out.length);\n    front.fill(0);\n    out = Buffer.concat([front, out]);\n  }\n  return out;\n};\n\nDH.prototype.getPublicKey = function getPublicKey(enc) {\n  return formatReturnValue(this._pub, enc);\n};\n\nDH.prototype.getPrivateKey = function getPrivateKey(enc) {\n  return formatReturnValue(this._priv, enc);\n};\n\nDH.prototype.getPrime = function (enc) {\n  return formatReturnValue(this.__prime, enc);\n};\n\nDH.prototype.getGenerator = function (enc) {\n  return formatReturnValue(this._gen, enc);\n};\n\nDH.prototype.setGenerator = function (gen, enc) {\n  enc = enc || 'utf8';\n  if (!Buffer.isBuffer(gen)) {\n    gen = new Buffer(gen, enc);\n  }\n  this.__gen = gen;\n  this._gen = new BN(gen);\n  return this;\n};\n\nfunction formatReturnValue(bn, enc) {\n  var buf = new Buffer(bn.toArray());\n  if (!enc) {\n    return buf;\n  } else {\n    return buf.toString(enc);\n  }\n}\n","var IS_PURE = require('../internals/is-pure');\nvar store = require('../internals/shared-store');\n\n(module.exports = function (key, value) {\n  return store[key] || (store[key] = value !== undefined ? value : {});\n})('versions', []).push({\n  version: '3.10.0',\n  mode: IS_PURE ? 'pure' : 'global',\n  copyright: '© 2021 Denis Pushkarev (zloirock.ru)'\n});\n","// from https://github.com/Rantanen/node-dtls/blob/25a7dc861bda38cfeac93a723500eea4f0ac2e86/Certificate.js\n// thanks to @Rantanen\n\n'use strict'\n\nvar asn = require('asn1.js')\n\nvar Time = asn.define('Time', function () {\n  this.choice({\n    utcTime: this.utctime(),\n    generalTime: this.gentime()\n  })\n})\n\nvar AttributeTypeValue = asn.define('AttributeTypeValue', function () {\n  this.seq().obj(\n    this.key('type').objid(),\n    this.key('value').any()\n  )\n})\n\nvar AlgorithmIdentifier = asn.define('AlgorithmIdentifier', function () {\n  this.seq().obj(\n    this.key('algorithm').objid(),\n    this.key('parameters').optional(),\n    this.key('curve').objid().optional()\n  )\n})\n\nvar SubjectPublicKeyInfo = asn.define('SubjectPublicKeyInfo', function () {\n  this.seq().obj(\n    this.key('algorithm').use(AlgorithmIdentifier),\n    this.key('subjectPublicKey').bitstr()\n  )\n})\n\nvar RelativeDistinguishedName = asn.define('RelativeDistinguishedName', function () {\n  this.setof(AttributeTypeValue)\n})\n\nvar RDNSequence = asn.define('RDNSequence', function () {\n  this.seqof(RelativeDistinguishedName)\n})\n\nvar Name = asn.define('Name', function () {\n  this.choice({\n    rdnSequence: this.use(RDNSequence)\n  })\n})\n\nvar Validity = asn.define('Validity', function () {\n  this.seq().obj(\n    this.key('notBefore').use(Time),\n    this.key('notAfter').use(Time)\n  )\n})\n\nvar Extension = asn.define('Extension', function () {\n  this.seq().obj(\n    this.key('extnID').objid(),\n    this.key('critical').bool().def(false),\n    this.key('extnValue').octstr()\n  )\n})\n\nvar TBSCertificate = asn.define('TBSCertificate', function () {\n  this.seq().obj(\n    this.key('version').explicit(0).int().optional(),\n    this.key('serialNumber').int(),\n    this.key('signature').use(AlgorithmIdentifier),\n    this.key('issuer').use(Name),\n    this.key('validity').use(Validity),\n    this.key('subject').use(Name),\n    this.key('subjectPublicKeyInfo').use(SubjectPublicKeyInfo),\n    this.key('issuerUniqueID').implicit(1).bitstr().optional(),\n    this.key('subjectUniqueID').implicit(2).bitstr().optional(),\n    this.key('extensions').explicit(3).seqof(Extension).optional()\n  )\n})\n\nvar X509Certificate = asn.define('X509Certificate', function () {\n  this.seq().obj(\n    this.key('tbsCertificate').use(TBSCertificate),\n    this.key('signatureAlgorithm').use(AlgorithmIdentifier),\n    this.key('signatureValue').bitstr()\n  )\n})\n\nmodule.exports = X509Certificate\n","\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nexports[\"default\"] = {\n  GOAL_BUFFER_LENGTH: 30,\n  MAX_GOAL_BUFFER_LENGTH: 60,\n  GOAL_BUFFER_LENGTH_RATE: 1,\n  // A fudge factor to apply to advertised playlist bitrates to account for\n  // temporary flucations in client bandwidth\n  BANDWIDTH_VARIANCE: 1.2,\n  // How much of the buffer must be filled before we consider upswitching\n  BUFFER_LOW_WATER_LINE: 0,\n  MAX_BUFFER_LOW_WATER_LINE: 30,\n  BUFFER_LOW_WATER_LINE_RATE: 1\n};\nmodule.exports = exports[\"default\"];","var getBuiltIn = require('../internals/get-built-in');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar anObject = require('../internals/an-object');\n\n// all object keys, includes non-enumerable and symbols\nmodule.exports = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {\n  var keys = getOwnPropertyNamesModule.f(anObject(it));\n  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n  return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;\n};\n","export default function getNodeName(element) {\n  return element ? (element.nodeName || '').toLowerCase() : null;\n}","'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _config = require('./config');\n\nvar _config2 = _interopRequireDefault(_config);\n\nvar _playlist = require('./playlist');\n\nvar _playlist2 = _interopRequireDefault(_playlist);\n\nvar _utilCodecsJs = require('./util/codecs.js');\n\n// Utilities\n\n/**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\nvar safeGetComputedStyle = function safeGetComputedStyle(el, property) {\n  var result = undefined;\n\n  if (!el) {\n    return '';\n  }\n\n  result = window.getComputedStyle(el);\n  if (!result) {\n    return '';\n  }\n\n  return result[property];\n};\n\n/**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\nvar stableSort = function stableSort(array, sortFn) {\n  var newArray = array.slice();\n\n  array.sort(function (left, right) {\n    var cmp = sortFn(left, right);\n\n    if (cmp === 0) {\n      return newArray.indexOf(left) - newArray.indexOf(right);\n    }\n    return cmp;\n  });\n};\n\n/**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {Number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\nvar comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {\n  var leftBandwidth = undefined;\n  var rightBandwidth = undefined;\n\n  if (left.attributes.BANDWIDTH) {\n    leftBandwidth = left.attributes.BANDWIDTH;\n  }\n  leftBandwidth = leftBandwidth || window.Number.MAX_VALUE;\n  if (right.attributes.BANDWIDTH) {\n    rightBandwidth = right.attributes.BANDWIDTH;\n  }\n  rightBandwidth = rightBandwidth || window.Number.MAX_VALUE;\n\n  return leftBandwidth - rightBandwidth;\n};\n\nexports.comparePlaylistBandwidth = comparePlaylistBandwidth;\n/**\n * A comparator function to sort two playlist object by resolution (width).\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {Number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\nvar comparePlaylistResolution = function comparePlaylistResolution(left, right) {\n  var leftWidth = undefined;\n  var rightWidth = undefined;\n\n  if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n    leftWidth = left.attributes.RESOLUTION.width;\n  }\n\n  leftWidth = leftWidth || window.Number.MAX_VALUE;\n\n  if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n    rightWidth = right.attributes.RESOLUTION.width;\n  }\n\n  rightWidth = rightWidth || window.Number.MAX_VALUE;\n\n  // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n  // have the same media dimensions/ resolution\n  if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n    return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n  }\n  return leftWidth - rightWidth;\n};\n\nexports.comparePlaylistResolution = comparePlaylistResolution;\n/**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} master\n *        Object representation of the master manifest\n * @param {Number} playerBandwidth\n *        Current calculated bandwidth of the player\n * @param {Number} playerWidth\n *        Current width of the player element\n * @param {Number} playerHeight\n *        Current height of the player element\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\nvar simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight) {\n  // convert the playlists to an intermediary representation to make comparisons easier\n  var sortedPlaylistReps = master.playlists.map(function (playlist) {\n    var width = undefined;\n    var height = undefined;\n    var bandwidth = undefined;\n\n    width = playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n    height = playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n    bandwidth = playlist.attributes.BANDWIDTH;\n\n    bandwidth = bandwidth || window.Number.MAX_VALUE;\n\n    return {\n      bandwidth: bandwidth,\n      width: width,\n      height: height,\n      playlist: playlist\n    };\n  });\n\n  stableSort(sortedPlaylistReps, function (left, right) {\n    return left.bandwidth - right.bandwidth;\n  });\n\n  // filter out any playlists that have been excluded due to\n  // incompatible configurations\n  sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return !_playlist2['default'].isIncompatible(rep.playlist);\n  });\n\n  // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n  var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return _playlist2['default'].isEnabled(rep.playlist);\n  });\n\n  if (!enabledPlaylistReps.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n      return !_playlist2['default'].isDisabled(rep.playlist);\n    });\n  }\n\n  // filter out any variant that has greater effective bitrate\n  // than the current estimated bandwidth\n  var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {\n    return rep.bandwidth * _config2['default'].BANDWIDTH_VARIANCE < playerBandwidth;\n  });\n\n  var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1];\n\n  // get all of the renditions with the same (highest) bandwidth\n  // and then taking the very first element\n  var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n\n  // filter out playlists without resolution information\n  var haveResolution = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.width && rep.height;\n  });\n\n  // sort variants by resolution\n  stableSort(haveResolution, function (left, right) {\n    return left.width - right.width;\n  });\n\n  // if we have the exact resolution as the player use it\n  var resolutionBestRepList = haveResolution.filter(function (rep) {\n    return rep.width === playerWidth && rep.height === playerHeight;\n  });\n\n  highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1];\n  // ensure that we pick the highest bandwidth variant that have exact resolution\n  var resolutionBestRep = resolutionBestRepList.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n\n  var resolutionPlusOneList = undefined;\n  var resolutionPlusOneSmallest = undefined;\n  var resolutionPlusOneRep = undefined;\n\n  // find the smallest variant that is larger than the player\n  // if there is no match of exact resolution\n  if (!resolutionBestRep) {\n    resolutionPlusOneList = haveResolution.filter(function (rep) {\n      return rep.width > playerWidth || rep.height > playerHeight;\n    });\n\n    // find all the variants have the same smallest resolution\n    resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {\n      return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;\n    });\n\n    // ensure that we also pick the highest bandwidth variant that\n    // is just-larger-than the video player\n    highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n    resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {\n      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n    })[0];\n  }\n\n  // fallback chain of variants\n  var chosenRep = resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n  return chosenRep ? chosenRep.playlist : null;\n};\n\nexports.simpleSelector = simpleSelector;\n// Playlist Selectors\n\n/**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of HlsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\nvar lastBandwidthSelector = function lastBandwidthSelector() {\n  return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10), parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10));\n};\n\nexports.lastBandwidthSelector = lastBandwidthSelector;\n/**\n * Chooses the appropriate media playlist based on an\n * exponential-weighted moving average of the bandwidth after\n * filtering for player size.\n *\n * Expects to be called within the context of an instance of HlsHandler\n *\n * @param {Number} decay - a number between 0 and 1. Higher values of\n * this parameter will cause previous bandwidth estimates to lose\n * significance more quickly.\n * @return {Function} a function which can be invoked to create a new\n * playlist selector function.\n * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average\n */\nvar movingAverageBandwidthSelector = function movingAverageBandwidthSelector(decay) {\n  var average = -1;\n\n  if (decay < 0 || decay > 1) {\n    throw new Error('Moving average bandwidth decay must be between 0 and 1.');\n  }\n\n  return function () {\n    if (average < 0) {\n      average = this.systemBandwidth;\n    }\n\n    average = decay * this.systemBandwidth + (1 - decay) * average;\n    return simpleSelector(this.playlists.master, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10), parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10));\n  };\n};\n\nexports.movingAverageBandwidthSelector = movingAverageBandwidthSelector;\n/**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n *        Object of information required to use this selector\n * @param {Object} settings.master\n *        Object representation of the master manifest\n * @param {Number} settings.currentTime\n *        The current time of the player\n * @param {Number} settings.bandwidth\n *        Current measured bandwidth\n * @param {Number} settings.duration\n *        Duration of the media\n * @param {Number} settings.segmentDuration\n *        Segment duration to be used in round trip time calculations\n * @param {Number} settings.timeUntilRebuffer\n *        Time left in seconds until the player has to rebuffer\n * @param {Number} settings.currentTimeline\n *        The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n *        SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n *         {Object} return.playlist\n *         The highest bandwidth playlist with the least amount of rebuffering\n *         {Number} return.rebufferingImpact\n *         The amount of time in seconds switching to this playlist will rebuffer. A\n *         negative value means that switching will cause zero rebuffering.\n */\nvar minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {\n  var master = settings.master;\n  var currentTime = settings.currentTime;\n  var bandwidth = settings.bandwidth;\n  var duration = settings.duration;\n  var segmentDuration = settings.segmentDuration;\n  var timeUntilRebuffer = settings.timeUntilRebuffer;\n  var currentTimeline = settings.currentTimeline;\n  var syncController = settings.syncController;\n\n  // filter out any playlists that have been excluded due to\n  // incompatible configurations\n  var compatiblePlaylists = master.playlists.filter(function (playlist) {\n    return !_playlist2['default'].isIncompatible(playlist);\n  });\n\n  // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n  var enabledPlaylists = compatiblePlaylists.filter(_playlist2['default'].isEnabled);\n\n  if (!enabledPlaylists.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylists = compatiblePlaylists.filter(function (playlist) {\n      return !_playlist2['default'].isDisabled(playlist);\n    });\n  }\n\n  var bandwidthPlaylists = enabledPlaylists.filter(_playlist2['default'].hasAttribute.bind(null, 'BANDWIDTH'));\n\n  var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {\n    var syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime);\n    // If there is no sync point for this playlist, switching to it will require a\n    // sync request first. This will double the request time\n    var numRequests = syncPoint ? 1 : 2;\n    var requestTimeEstimate = _playlist2['default'].estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n    var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n\n    return {\n      playlist: playlist,\n      rebufferingImpact: rebufferingImpact\n    };\n  });\n\n  var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {\n    return estimate.rebufferingImpact <= 0;\n  });\n\n  // Sort by bandwidth DESC\n  stableSort(noRebufferingPlaylists, function (a, b) {\n    return comparePlaylistBandwidth(b.playlist, a.playlist);\n  });\n\n  if (noRebufferingPlaylists.length) {\n    return noRebufferingPlaylists[0];\n  }\n\n  stableSort(rebufferingEstimates, function (a, b) {\n    return a.rebufferingImpact - b.rebufferingImpact;\n  });\n\n  return rebufferingEstimates[0] || null;\n};\n\nexports.minRebufferMaxBandwidthSelector = minRebufferMaxBandwidthSelector;\n/**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video.  If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of HlsHandler\n *\n * @return {Object|null}\n *         {Object} return.playlist\n *         The lowest bitrate playlist that contains a video codec.  If no such rendition\n *         exists pick the lowest audio rendition.\n */\nvar lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {\n  // filter out any playlists that have been excluded due to\n  // incompatible configurations or playback errors\n  var playlists = this.playlists.master.playlists.filter(_playlist2['default'].isEnabled);\n\n  // Sort ascending by bitrate\n  stableSort(playlists, function (a, b) {\n    return comparePlaylistBandwidth(a, b);\n  });\n\n  // Parse and assume that playlists with no video codec have no video\n  // (this is not necessarily true, although it is generally true).\n  //\n  // If an entire manifest has no valid videos everything will get filtered\n  // out.\n  var playlistsWithVideo = playlists.filter(function (playlist) {\n    return (0, _utilCodecsJs.parseCodecs)(playlist.attributes.CODECS).videoCodec;\n  });\n\n  return playlistsWithVideo[0] || null;\n};\nexports.lowestBitrateCompatibleVariantSelector = lowestBitrateCompatibleVariantSelector;","'use strict';\n\nvar _Object$setPrototypeO;\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nvar finished = require('./end-of-stream');\n\nvar kLastResolve = Symbol('lastResolve');\nvar kLastReject = Symbol('lastReject');\nvar kError = Symbol('error');\nvar kEnded = Symbol('ended');\nvar kLastPromise = Symbol('lastPromise');\nvar kHandlePromise = Symbol('handlePromise');\nvar kStream = Symbol('stream');\n\nfunction createIterResult(value, done) {\n  return {\n    value: value,\n    done: done\n  };\n}\n\nfunction readAndResolve(iter) {\n  var resolve = iter[kLastResolve];\n\n  if (resolve !== null) {\n    var data = iter[kStream].read(); // we defer if data is null\n    // we can be expecting either 'end' or\n    // 'error'\n\n    if (data !== null) {\n      iter[kLastPromise] = null;\n      iter[kLastResolve] = null;\n      iter[kLastReject] = null;\n      resolve(createIterResult(data, false));\n    }\n  }\n}\n\nfunction onReadable(iter) {\n  // we wait for the next tick, because it might\n  // emit an error with process.nextTick\n  process.nextTick(readAndResolve, iter);\n}\n\nfunction wrapForNext(lastPromise, iter) {\n  return function (resolve, reject) {\n    lastPromise.then(function () {\n      if (iter[kEnded]) {\n        resolve(createIterResult(undefined, true));\n        return;\n      }\n\n      iter[kHandlePromise](resolve, reject);\n    }, reject);\n  };\n}\n\nvar AsyncIteratorPrototype = Object.getPrototypeOf(function () {});\nvar ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {\n  get stream() {\n    return this[kStream];\n  },\n\n  next: function next() {\n    var _this = this;\n\n    // if we have detected an error in the meanwhile\n    // reject straight away\n    var error = this[kError];\n\n    if (error !== null) {\n      return Promise.reject(error);\n    }\n\n    if (this[kEnded]) {\n      return Promise.resolve(createIterResult(undefined, true));\n    }\n\n    if (this[kStream].destroyed) {\n      // We need to defer via nextTick because if .destroy(err) is\n      // called, the error will be emitted via nextTick, and\n      // we cannot guarantee that there is no error lingering around\n      // waiting to be emitted.\n      return new Promise(function (resolve, reject) {\n        process.nextTick(function () {\n          if (_this[kError]) {\n            reject(_this[kError]);\n          } else {\n            resolve(createIterResult(undefined, true));\n          }\n        });\n      });\n    } // if we have multiple next() calls\n    // we will wait for the previous Promise to finish\n    // this logic is optimized to support for await loops,\n    // where next() is only called once at a time\n\n\n    var lastPromise = this[kLastPromise];\n    var promise;\n\n    if (lastPromise) {\n      promise = new Promise(wrapForNext(lastPromise, this));\n    } else {\n      // fast path needed to support multiple this.push()\n      // without triggering the next() queue\n      var data = this[kStream].read();\n\n      if (data !== null) {\n        return Promise.resolve(createIterResult(data, false));\n      }\n\n      promise = new Promise(this[kHandlePromise]);\n    }\n\n    this[kLastPromise] = promise;\n    return promise;\n  }\n}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {\n  return this;\n}), _defineProperty(_Object$setPrototypeO, \"return\", function _return() {\n  var _this2 = this;\n\n  // destroy(err, cb) is a private API\n  // we can guarantee we have that here, because we control the\n  // Readable class this is attached to\n  return new Promise(function (resolve, reject) {\n    _this2[kStream].destroy(null, function (err) {\n      if (err) {\n        reject(err);\n        return;\n      }\n\n      resolve(createIterResult(undefined, true));\n    });\n  });\n}), _Object$setPrototypeO), AsyncIteratorPrototype);\n\nvar createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {\n  var _Object$create;\n\n  var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {\n    value: stream,\n    writable: true\n  }), _defineProperty(_Object$create, kLastResolve, {\n    value: null,\n    writable: true\n  }), _defineProperty(_Object$create, kLastReject, {\n    value: null,\n    writable: true\n  }), _defineProperty(_Object$create, kError, {\n    value: null,\n    writable: true\n  }), _defineProperty(_Object$create, kEnded, {\n    value: stream._readableState.endEmitted,\n    writable: true\n  }), _defineProperty(_Object$create, kHandlePromise, {\n    value: function value(resolve, reject) {\n      var data = iterator[kStream].read();\n\n      if (data) {\n        iterator[kLastPromise] = null;\n        iterator[kLastResolve] = null;\n        iterator[kLastReject] = null;\n        resolve(createIterResult(data, false));\n      } else {\n        iterator[kLastResolve] = resolve;\n        iterator[kLastReject] = reject;\n      }\n    },\n    writable: true\n  }), _Object$create));\n  iterator[kLastPromise] = null;\n  finished(stream, function (err) {\n    if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {\n      var reject = iterator[kLastReject]; // reject if we are waiting for data in the Promise\n      // returned by next() and store the error\n\n      if (reject !== null) {\n        iterator[kLastPromise] = null;\n        iterator[kLastResolve] = null;\n        iterator[kLastReject] = null;\n        reject(err);\n      }\n\n      iterator[kError] = err;\n      return;\n    }\n\n    var resolve = iterator[kLastResolve];\n\n    if (resolve !== null) {\n      iterator[kLastPromise] = null;\n      iterator[kLastResolve] = null;\n      iterator[kLastReject] = null;\n      resolve(createIterResult(undefined, true));\n    }\n\n    iterator[kEnded] = true;\n  });\n  stream.on('readable', onReadable.bind(null, iterator));\n  return iterator;\n};\n\nmodule.exports = createReadableStreamAsyncIterator;","// a string of all valid unicode whitespaces\nmodule.exports = '\\u0009\\u000A\\u000B\\u000C\\u000D\\u0020\\u00A0\\u1680\\u2000\\u2001\\u2002' +\n  '\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF';\n","var randomBytes = require('randombytes');\nmodule.exports = findPrime;\nfindPrime.simpleSieve = simpleSieve;\nfindPrime.fermatTest = fermatTest;\nvar BN = require('bn.js');\nvar TWENTYFOUR = new BN(24);\nvar MillerRabin = require('miller-rabin');\nvar millerRabin = new MillerRabin();\nvar ONE = new BN(1);\nvar TWO = new BN(2);\nvar FIVE = new BN(5);\nvar SIXTEEN = new BN(16);\nvar EIGHT = new BN(8);\nvar TEN = new BN(10);\nvar THREE = new BN(3);\nvar SEVEN = new BN(7);\nvar ELEVEN = new BN(11);\nvar FOUR = new BN(4);\nvar TWELVE = new BN(12);\nvar primes = null;\n\nfunction _getPrimes() {\n  if (primes !== null)\n    return primes;\n\n  var limit = 0x100000;\n  var res = [];\n  res[0] = 2;\n  for (var i = 1, k = 3; k < limit; k += 2) {\n    var sqrt = Math.ceil(Math.sqrt(k));\n    for (var j = 0; j < i && res[j] <= sqrt; j++)\n      if (k % res[j] === 0)\n        break;\n\n    if (i !== j && res[j] <= sqrt)\n      continue;\n\n    res[i++] = k;\n  }\n  primes = res;\n  return res;\n}\n\nfunction simpleSieve(p) {\n  var primes = _getPrimes();\n\n  for (var i = 0; i < primes.length; i++)\n    if (p.modn(primes[i]) === 0) {\n      if (p.cmpn(primes[i]) === 0) {\n        return true;\n      } else {\n        return false;\n      }\n    }\n\n  return true;\n}\n\nfunction fermatTest(p) {\n  var red = BN.mont(p);\n  return TWO.toRed(red).redPow(p.subn(1)).fromRed().cmpn(1) === 0;\n}\n\nfunction findPrime(bits, gen) {\n  if (bits < 16) {\n    // this is what openssl does\n    if (gen === 2 || gen === 5) {\n      return new BN([0x8c, 0x7b]);\n    } else {\n      return new BN([0x8c, 0x27]);\n    }\n  }\n  gen = new BN(gen);\n\n  var num, n2;\n\n  while (true) {\n    num = new BN(randomBytes(Math.ceil(bits / 8)));\n    while (num.bitLength() > bits) {\n      num.ishrn(1);\n    }\n    if (num.isEven()) {\n      num.iadd(ONE);\n    }\n    if (!num.testn(1)) {\n      num.iadd(TWO);\n    }\n    if (!gen.cmp(TWO)) {\n      while (num.mod(TWENTYFOUR).cmp(ELEVEN)) {\n        num.iadd(FOUR);\n      }\n    } else if (!gen.cmp(FIVE)) {\n      while (num.mod(TEN).cmp(THREE)) {\n        num.iadd(FOUR);\n      }\n    }\n    n2 = num.shrn(1);\n    if (simpleSieve(n2) && simpleSieve(num) &&\n      fermatTest(n2) && fermatTest(num) &&\n      millerRabin.test(n2) && millerRabin.test(num)) {\n      return num;\n    }\n  }\n\n}\n","var requireObjectCoercible = require('../internals/require-object-coercible');\nvar whitespaces = require('../internals/whitespaces');\n\nvar whitespace = '[' + whitespaces + ']';\nvar ltrim = RegExp('^' + whitespace + whitespace + '*');\nvar rtrim = RegExp(whitespace + whitespace + '*$');\n\n// `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation\nvar createMethod = function (TYPE) {\n  return function ($this) {\n    var string = String(requireObjectCoercible($this));\n    if (TYPE & 1) string = string.replace(ltrim, '');\n    if (TYPE & 2) string = string.replace(rtrim, '');\n    return string;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.{ trimLeft, trimStart }` methods\n  // https://tc39.es/ecma262/#sec-string.prototype.trimstart\n  start: createMethod(1),\n  // `String.prototype.{ trimRight, trimEnd }` methods\n  // https://tc39.es/ecma262/#sec-string.prototype.trimend\n  end: createMethod(2),\n  // `String.prototype.trim` method\n  // https://tc39.es/ecma262/#sec-string.prototype.trim\n  trim: createMethod(3)\n};\n","'use strict';\n\nexports.sha1 = require('./sha/1');\nexports.sha224 = require('./sha/224');\nexports.sha256 = require('./sha/256');\nexports.sha384 = require('./sha/384');\nexports.sha512 = require('./sha/512');\n",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var Base = C_lib.Base;\n\t    var C_enc = C.enc;\n\t    var Utf8 = C_enc.Utf8;\n\t    var C_algo = C.algo;\n\n\t    /**\n\t     * HMAC algorithm.\n\t     */\n\t    var HMAC = C_algo.HMAC = Base.extend({\n\t        /**\n\t         * Initializes a newly created HMAC.\n\t         *\n\t         * @param {Hasher} hasher The hash algorithm to use.\n\t         * @param {WordArray|string} key The secret key.\n\t         *\n\t         * @example\n\t         *\n\t         *     var hmacHasher = CryptoJS.algo.HMAC.create(CryptoJS.algo.SHA256, key);\n\t         */\n\t        init: function (hasher, key) {\n\t            // Init hasher\n\t            hasher = this._hasher = new hasher.init();\n\n\t            // Convert string to WordArray, else assume WordArray already\n\t            if (typeof key == 'string') {\n\t                key = Utf8.parse(key);\n\t            }\n\n\t            // Shortcuts\n\t            var hasherBlockSize = hasher.blockSize;\n\t            var hasherBlockSizeBytes = hasherBlockSize * 4;\n\n\t            // Allow arbitrary length keys\n\t            if (key.sigBytes > hasherBlockSizeBytes) {\n\t                key = hasher.finalize(key);\n\t            }\n\n\t            // Clamp excess bits\n\t            key.clamp();\n\n\t            // Clone key for inner and outer pads\n\t            var oKey = this._oKey = key.clone();\n\t            var iKey = this._iKey = key.clone();\n\n\t            // Shortcuts\n\t            var oKeyWords = oKey.words;\n\t            var iKeyWords = iKey.words;\n\n\t            // XOR keys with pad constants\n\t            for (var i = 0; i < hasherBlockSize; i++) {\n\t                oKeyWords[i] ^= 0x5c5c5c5c;\n\t                iKeyWords[i] ^= 0x36363636;\n\t            }\n\t            oKey.sigBytes = iKey.sigBytes = hasherBlockSizeBytes;\n\n\t            // Set initial values\n\t            this.reset();\n\t        },\n\n\t        /**\n\t         * Resets this HMAC to its initial state.\n\t         *\n\t         * @example\n\t         *\n\t         *     hmacHasher.reset();\n\t         */\n\t        reset: function () {\n\t            // Shortcut\n\t            var hasher = this._hasher;\n\n\t            // Reset\n\t            hasher.reset();\n\t            hasher.update(this._iKey);\n\t        },\n\n\t        /**\n\t         * Updates this HMAC with a message.\n\t         *\n\t         * @param {WordArray|string} messageUpdate The message to append.\n\t         *\n\t         * @return {HMAC} This HMAC instance.\n\t         *\n\t         * @example\n\t         *\n\t         *     hmacHasher.update('message');\n\t         *     hmacHasher.update(wordArray);\n\t         */\n\t        update: function (messageUpdate) {\n\t            this._hasher.update(messageUpdate);\n\n\t            // Chainable\n\t            return this;\n\t        },\n\n\t        /**\n\t         * Finalizes the HMAC computation.\n\t         * Note that the finalize operation is effectively a destructive, read-once operation.\n\t         *\n\t         * @param {WordArray|string} messageUpdate (Optional) A final message update.\n\t         *\n\t         * @return {WordArray} The HMAC.\n\t         *\n\t         * @example\n\t         *\n\t         *     var hmac = hmacHasher.finalize();\n\t         *     var hmac = hmacHasher.finalize('message');\n\t         *     var hmac = hmacHasher.finalize(wordArray);\n\t         */\n\t        finalize: function (messageUpdate) {\n\t            // Shortcut\n\t            var hasher = this._hasher;\n\n\t            // Compute HMAC\n\t            var innerHash = hasher.finalize(messageUpdate);\n\t            hasher.reset();\n\t            var hmac = hasher.finalize(this._oKey.clone().concat(innerHash));\n\n\t            return hmac;\n\t        }\n\t    });\n\t}());\n\n\n}));","var isRegExp = require('../internals/is-regexp');\n\nmodule.exports = function (it) {\n  if (isRegExp(it)) {\n    throw TypeError(\"The method doesn't accept regular expressions\");\n  } return it;\n};\n","var MD5 = require('md5.js')\n\nmodule.exports = function (buffer) {\n  return new MD5().update(buffer).digest()\n}\n","module.exports = require('events').EventEmitter;\n","module.exports = function (bitmap, value) {\n  return {\n    enumerable: !(bitmap & 1),\n    configurable: !(bitmap & 2),\n    writable: !(bitmap & 4),\n    value: value\n  };\n};\n","/**\n * @file transmuxer-worker.js\n */\n\n/**\n * videojs-contrib-media-sources\n *\n * Copyright (c) 2015 Brightcove\n * All rights reserved.\n *\n * Handles communication between the browser-world and the mux.js\n * transmuxer running inside of a WebWorker by exposing a simple\n * message-based interface to a Transmuxer object.\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _muxJsLibMp4 = require('mux.js/lib/mp4');\n\nvar _muxJsLibMp42 = _interopRequireDefault(_muxJsLibMp4);\n\n/**\n * Re-emits transmuxer events by converting them into messages to the\n * world outside the worker.\n *\n * @param {Object} transmuxer the transmuxer to wire events on\n * @private\n */\nvar wireTransmuxerEvents = function wireTransmuxerEvents(transmuxer) {\n  transmuxer.on('data', function (segment) {\n    // transfer ownership of the underlying ArrayBuffer\n    // instead of doing a copy to save memory\n    // ArrayBuffers are transferable but generic TypedArrays are not\n    // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n    var initArray = segment.initSegment;\n\n    segment.initSegment = {\n      data: initArray.buffer,\n      byteOffset: initArray.byteOffset,\n      byteLength: initArray.byteLength\n    };\n\n    var typedArray = segment.data;\n\n    segment.data = typedArray.buffer;\n    _globalWindow2['default'].postMessage({\n      action: 'data',\n      segment: segment,\n      byteOffset: typedArray.byteOffset,\n      byteLength: typedArray.byteLength\n    }, [segment.data]);\n  });\n\n  if (transmuxer.captionStream) {\n    transmuxer.captionStream.on('data', function (caption) {\n      _globalWindow2['default'].postMessage({\n        action: 'caption',\n        data: caption\n      });\n    });\n  }\n\n  transmuxer.on('done', function (data) {\n    _globalWindow2['default'].postMessage({ action: 'done' });\n  });\n\n  transmuxer.on('gopInfo', function (gopInfo) {\n    _globalWindow2['default'].postMessage({\n      action: 'gopInfo',\n      gopInfo: gopInfo\n    });\n  });\n};\n\n/**\n * All incoming messages route through this hash. If no function exists\n * to handle an incoming message, then we ignore the message.\n *\n * @class MessageHandlers\n * @param {Object} options the options to initialize with\n */\n\nvar MessageHandlers = (function () {\n  function MessageHandlers(options) {\n    _classCallCheck(this, MessageHandlers);\n\n    this.options = options || {};\n    this.init();\n  }\n\n  /**\n   * Our web wroker interface so that things can talk to mux.js\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   *\n   * @param {Object} self the scope for the web worker\n   */\n\n  /**\n   * initialize our web worker and wire all the events.\n   */\n\n  _createClass(MessageHandlers, [{\n    key: 'init',\n    value: function init() {\n      if (this.transmuxer) {\n        this.transmuxer.dispose();\n      }\n      this.transmuxer = new _muxJsLibMp42['default'].Transmuxer(this.options);\n      wireTransmuxerEvents(this.transmuxer);\n    }\n\n    /**\n     * Adds data (a ts segment) to the start of the transmuxer pipeline for\n     * processing.\n     *\n     * @param {ArrayBuffer} data data to push into the muxer\n     */\n  }, {\n    key: 'push',\n    value: function push(data) {\n      // Cast array buffer to correct type for transmuxer\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n\n      this.transmuxer.push(segment);\n    }\n\n    /**\n     * Recreate the transmuxer so that the next segment added via `push`\n     * start with a fresh transmuxer.\n     */\n  }, {\n    key: 'reset',\n    value: function reset() {\n      this.init();\n    }\n\n    /**\n     * Set the value that will be used as the `baseMediaDecodeTime` time for the\n     * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n     * set relative to the first based on the PTS values.\n     *\n     * @param {Object} data used to set the timestamp offset in the muxer\n     */\n  }, {\n    key: 'setTimestampOffset',\n    value: function setTimestampOffset(data) {\n      var timestampOffset = data.timestampOffset || 0;\n\n      this.transmuxer.setBaseMediaDecodeTime(Math.round(timestampOffset * 90000));\n    }\n  }, {\n    key: 'setAudioAppendStart',\n    value: function setAudioAppendStart(data) {\n      this.transmuxer.setAudioAppendStart(Math.ceil(data.appendStart * 90000));\n    }\n\n    /**\n     * Forces the pipeline to finish processing the last segment and emit it's\n     * results.\n     *\n     * @param {Object} data event data, not really used\n     */\n  }, {\n    key: 'flush',\n    value: function flush(data) {\n      this.transmuxer.flush();\n    }\n  }, {\n    key: 'resetCaptions',\n    value: function resetCaptions() {\n      this.transmuxer.resetCaptions();\n    }\n  }, {\n    key: 'alignGopsWith',\n    value: function alignGopsWith(data) {\n      this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n    }\n  }]);\n\n  return MessageHandlers;\n})();\n\nvar TransmuxerWorker = function TransmuxerWorker(self) {\n  self.onmessage = function (event) {\n    if (event.data.action === 'init' && event.data.options) {\n      this.messageHandlers = new MessageHandlers(event.data.options);\n      return;\n    }\n\n    if (!this.messageHandlers) {\n      this.messageHandlers = new MessageHandlers();\n    }\n\n    if (event.data && event.data.action && event.data.action !== 'init') {\n      if (this.messageHandlers[event.data.action]) {\n        this.messageHandlers[event.data.action](event.data);\n      }\n    }\n  };\n};\n\nexports['default'] = function (self) {\n  return new TransmuxerWorker(self);\n};\n\nmodule.exports = exports['default'];","import getBasePlacement from \"./getBasePlacement.js\";\nimport getVariation from \"./getVariation.js\";\nimport getMainAxisFromPlacement from \"./getMainAxisFromPlacement.js\";\nimport { top, right, bottom, left, start, end } from \"../enums.js\";\nexport default function computeOffsets(_ref) {\n  var reference = _ref.reference,\n      element = _ref.element,\n      placement = _ref.placement;\n  var basePlacement = placement ? getBasePlacement(placement) : null;\n  var variation = placement ? getVariation(placement) : null;\n  var commonX = reference.x + reference.width / 2 - element.width / 2;\n  var commonY = reference.y + reference.height / 2 - element.height / 2;\n  var offsets;\n\n  switch (basePlacement) {\n    case top:\n      offsets = {\n        x: commonX,\n        y: reference.y - element.height\n      };\n      break;\n\n    case bottom:\n      offsets = {\n        x: commonX,\n        y: reference.y + reference.height\n      };\n      break;\n\n    case right:\n      offsets = {\n        x: reference.x + reference.width,\n        y: commonY\n      };\n      break;\n\n    case left:\n      offsets = {\n        x: reference.x - element.width,\n        y: commonY\n      };\n      break;\n\n    default:\n      offsets = {\n        x: reference.x,\n        y: reference.y\n      };\n  }\n\n  var mainAxis = basePlacement ? getMainAxisFromPlacement(basePlacement) : null;\n\n  if (mainAxis != null) {\n    var len = mainAxis === 'y' ? 'height' : 'width';\n\n    switch (variation) {\n      case start:\n        offsets[mainAxis] = offsets[mainAxis] - (reference[len] / 2 - element[len] / 2);\n        break;\n\n      case end:\n        offsets[mainAxis] = offsets[mainAxis] + (reference[len] / 2 - element[len] / 2);\n        break;\n\n      default:\n    }\n  }\n\n  return offsets;\n}","'use strict';\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nvar Buffer = require('safe-buffer').Buffer;\nvar util = require('util');\n\nfunction copyBuffer(src, target, offset) {\n  src.copy(target, offset);\n}\n\nmodule.exports = function () {\n  function BufferList() {\n    _classCallCheck(this, BufferList);\n\n    this.head = null;\n    this.tail = null;\n    this.length = 0;\n  }\n\n  BufferList.prototype.push = function push(v) {\n    var entry = { data: v, next: null };\n    if (this.length > 0) this.tail.next = entry;else this.head = entry;\n    this.tail = entry;\n    ++this.length;\n  };\n\n  BufferList.prototype.unshift = function unshift(v) {\n    var entry = { data: v, next: this.head };\n    if (this.length === 0) this.tail = entry;\n    this.head = entry;\n    ++this.length;\n  };\n\n  BufferList.prototype.shift = function shift() {\n    if (this.length === 0) return;\n    var ret = this.head.data;\n    if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;\n    --this.length;\n    return ret;\n  };\n\n  BufferList.prototype.clear = function clear() {\n    this.head = this.tail = null;\n    this.length = 0;\n  };\n\n  BufferList.prototype.join = function join(s) {\n    if (this.length === 0) return '';\n    var p = this.head;\n    var ret = '' + p.data;\n    while (p = p.next) {\n      ret += s + p.data;\n    }return ret;\n  };\n\n  BufferList.prototype.concat = function concat(n) {\n    if (this.length === 0) return Buffer.alloc(0);\n    if (this.length === 1) return this.head.data;\n    var ret = Buffer.allocUnsafe(n >>> 0);\n    var p = this.head;\n    var i = 0;\n    while (p) {\n      copyBuffer(p.data, ret, i);\n      i += p.data.length;\n      p = p.next;\n    }\n    return ret;\n  };\n\n  return BufferList;\n}();\n\nif (util && util.inspect && util.inspect.custom) {\n  module.exports.prototype[util.inspect.custom] = function () {\n    var obj = util.inspect({ length: this.length });\n    return this.constructor.name + ' ' + obj;\n  };\n}","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// a duplex stream is just a stream that is both readable and writable.\n// Since JS doesn't have multiple prototypal inheritance, this class\n// prototypally inherits from Readable, and then parasitically from\n// Writable.\n'use strict';\n/*<replacement>*/\n\nvar objectKeys = Object.keys || function (obj) {\n  var keys = [];\n\n  for (var key in obj) {\n    keys.push(key);\n  }\n\n  return keys;\n};\n/*</replacement>*/\n\n\nmodule.exports = Duplex;\n\nvar Readable = require('./_stream_readable');\n\nvar Writable = require('./_stream_writable');\n\nrequire('inherits')(Duplex, Readable);\n\n{\n  // Allow the keys array to be GC'ed.\n  var keys = objectKeys(Writable.prototype);\n\n  for (var v = 0; v < keys.length; v++) {\n    var method = keys[v];\n    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];\n  }\n}\n\nfunction Duplex(options) {\n  if (!(this instanceof Duplex)) return new Duplex(options);\n  Readable.call(this, options);\n  Writable.call(this, options);\n  this.allowHalfOpen = true;\n\n  if (options) {\n    if (options.readable === false) this.readable = false;\n    if (options.writable === false) this.writable = false;\n\n    if (options.allowHalfOpen === false) {\n      this.allowHalfOpen = false;\n      this.once('end', onend);\n    }\n  }\n}\n\nObject.defineProperty(Duplex.prototype, 'writableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.highWaterMark;\n  }\n});\nObject.defineProperty(Duplex.prototype, 'writableBuffer', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState && this._writableState.getBuffer();\n  }\n});\nObject.defineProperty(Duplex.prototype, 'writableLength', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.length;\n  }\n}); // the no-half-open enforcer\n\nfunction onend() {\n  // If the writable side ended, then we're ok.\n  if (this._writableState.ended) return; // no more data can be written.\n  // But allow more writes to happen in this tick.\n\n  process.nextTick(onEndNT, this);\n}\n\nfunction onEndNT(self) {\n  self.end();\n}\n\nObject.defineProperty(Duplex.prototype, 'destroyed', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    if (this._readableState === undefined || this._writableState === undefined) {\n      return false;\n    }\n\n    return this._readableState.destroyed && this._writableState.destroyed;\n  },\n  set: function set(value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (this._readableState === undefined || this._writableState === undefined) {\n      return;\n    } // backward compatibility, the user is explicitly\n    // managing destroyed\n\n\n    this._readableState.destroyed = value;\n    this._writableState.destroyed = value;\n  }\n});","'use strict';\n\nexports.readUInt32BE = function readUInt32BE(bytes, off) {\n  var res =  (bytes[0 + off] << 24) |\n             (bytes[1 + off] << 16) |\n             (bytes[2 + off] << 8) |\n             bytes[3 + off];\n  return res >>> 0;\n};\n\nexports.writeUInt32BE = function writeUInt32BE(bytes, value, off) {\n  bytes[0 + off] = value >>> 24;\n  bytes[1 + off] = (value >>> 16) & 0xff;\n  bytes[2 + off] = (value >>> 8) & 0xff;\n  bytes[3 + off] = value & 0xff;\n};\n\nexports.ip = function ip(inL, inR, out, off) {\n  var outL = 0;\n  var outR = 0;\n\n  for (var i = 6; i >= 0; i -= 2) {\n    for (var j = 0; j <= 24; j += 8) {\n      outL <<= 1;\n      outL |= (inR >>> (j + i)) & 1;\n    }\n    for (var j = 0; j <= 24; j += 8) {\n      outL <<= 1;\n      outL |= (inL >>> (j + i)) & 1;\n    }\n  }\n\n  for (var i = 6; i >= 0; i -= 2) {\n    for (var j = 1; j <= 25; j += 8) {\n      outR <<= 1;\n      outR |= (inR >>> (j + i)) & 1;\n    }\n    for (var j = 1; j <= 25; j += 8) {\n      outR <<= 1;\n      outR |= (inL >>> (j + i)) & 1;\n    }\n  }\n\n  out[off + 0] = outL >>> 0;\n  out[off + 1] = outR >>> 0;\n};\n\nexports.rip = function rip(inL, inR, out, off) {\n  var outL = 0;\n  var outR = 0;\n\n  for (var i = 0; i < 4; i++) {\n    for (var j = 24; j >= 0; j -= 8) {\n      outL <<= 1;\n      outL |= (inR >>> (j + i)) & 1;\n      outL <<= 1;\n      outL |= (inL >>> (j + i)) & 1;\n    }\n  }\n  for (var i = 4; i < 8; i++) {\n    for (var j = 24; j >= 0; j -= 8) {\n      outR <<= 1;\n      outR |= (inR >>> (j + i)) & 1;\n      outR <<= 1;\n      outR |= (inL >>> (j + i)) & 1;\n    }\n  }\n\n  out[off + 0] = outL >>> 0;\n  out[off + 1] = outR >>> 0;\n};\n\nexports.pc1 = function pc1(inL, inR, out, off) {\n  var outL = 0;\n  var outR = 0;\n\n  // 7, 15, 23, 31, 39, 47, 55, 63\n  // 6, 14, 22, 30, 39, 47, 55, 63\n  // 5, 13, 21, 29, 39, 47, 55, 63\n  // 4, 12, 20, 28\n  for (var i = 7; i >= 5; i--) {\n    for (var j = 0; j <= 24; j += 8) {\n      outL <<= 1;\n      outL |= (inR >> (j + i)) & 1;\n    }\n    for (var j = 0; j <= 24; j += 8) {\n      outL <<= 1;\n      outL |= (inL >> (j + i)) & 1;\n    }\n  }\n  for (var j = 0; j <= 24; j += 8) {\n    outL <<= 1;\n    outL |= (inR >> (j + i)) & 1;\n  }\n\n  // 1, 9, 17, 25, 33, 41, 49, 57\n  // 2, 10, 18, 26, 34, 42, 50, 58\n  // 3, 11, 19, 27, 35, 43, 51, 59\n  // 36, 44, 52, 60\n  for (var i = 1; i <= 3; i++) {\n    for (var j = 0; j <= 24; j += 8) {\n      outR <<= 1;\n      outR |= (inR >> (j + i)) & 1;\n    }\n    for (var j = 0; j <= 24; j += 8) {\n      outR <<= 1;\n      outR |= (inL >> (j + i)) & 1;\n    }\n  }\n  for (var j = 0; j <= 24; j += 8) {\n    outR <<= 1;\n    outR |= (inL >> (j + i)) & 1;\n  }\n\n  out[off + 0] = outL >>> 0;\n  out[off + 1] = outR >>> 0;\n};\n\nexports.r28shl = function r28shl(num, shift) {\n  return ((num << shift) & 0xfffffff) | (num >>> (28 - shift));\n};\n\nvar pc2table = [\n  // inL => outL\n  14, 11, 17, 4, 27, 23, 25, 0,\n  13, 22, 7, 18, 5, 9, 16, 24,\n  2, 20, 12, 21, 1, 8, 15, 26,\n\n  // inR => outR\n  15, 4, 25, 19, 9, 1, 26, 16,\n  5, 11, 23, 8, 12, 7, 17, 0,\n  22, 3, 10, 14, 6, 20, 27, 24\n];\n\nexports.pc2 = function pc2(inL, inR, out, off) {\n  var outL = 0;\n  var outR = 0;\n\n  var len = pc2table.length >>> 1;\n  for (var i = 0; i < len; i++) {\n    outL <<= 1;\n    outL |= (inL >>> pc2table[i]) & 0x1;\n  }\n  for (var i = len; i < pc2table.length; i++) {\n    outR <<= 1;\n    outR |= (inR >>> pc2table[i]) & 0x1;\n  }\n\n  out[off + 0] = outL >>> 0;\n  out[off + 1] = outR >>> 0;\n};\n\nexports.expand = function expand(r, out, off) {\n  var outL = 0;\n  var outR = 0;\n\n  outL = ((r & 1) << 5) | (r >>> 27);\n  for (var i = 23; i >= 15; i -= 4) {\n    outL <<= 6;\n    outL |= (r >>> i) & 0x3f;\n  }\n  for (var i = 11; i >= 3; i -= 4) {\n    outR |= (r >>> i) & 0x3f;\n    outR <<= 6;\n  }\n  outR |= ((r & 0x1f) << 1) | (r >>> 31);\n\n  out[off + 0] = outL >>> 0;\n  out[off + 1] = outR >>> 0;\n};\n\nvar sTable = [\n  14, 0, 4, 15, 13, 7, 1, 4, 2, 14, 15, 2, 11, 13, 8, 1,\n  3, 10, 10, 6, 6, 12, 12, 11, 5, 9, 9, 5, 0, 3, 7, 8,\n  4, 15, 1, 12, 14, 8, 8, 2, 13, 4, 6, 9, 2, 1, 11, 7,\n  15, 5, 12, 11, 9, 3, 7, 14, 3, 10, 10, 0, 5, 6, 0, 13,\n\n  15, 3, 1, 13, 8, 4, 14, 7, 6, 15, 11, 2, 3, 8, 4, 14,\n  9, 12, 7, 0, 2, 1, 13, 10, 12, 6, 0, 9, 5, 11, 10, 5,\n  0, 13, 14, 8, 7, 10, 11, 1, 10, 3, 4, 15, 13, 4, 1, 2,\n  5, 11, 8, 6, 12, 7, 6, 12, 9, 0, 3, 5, 2, 14, 15, 9,\n\n  10, 13, 0, 7, 9, 0, 14, 9, 6, 3, 3, 4, 15, 6, 5, 10,\n  1, 2, 13, 8, 12, 5, 7, 14, 11, 12, 4, 11, 2, 15, 8, 1,\n  13, 1, 6, 10, 4, 13, 9, 0, 8, 6, 15, 9, 3, 8, 0, 7,\n  11, 4, 1, 15, 2, 14, 12, 3, 5, 11, 10, 5, 14, 2, 7, 12,\n\n  7, 13, 13, 8, 14, 11, 3, 5, 0, 6, 6, 15, 9, 0, 10, 3,\n  1, 4, 2, 7, 8, 2, 5, 12, 11, 1, 12, 10, 4, 14, 15, 9,\n  10, 3, 6, 15, 9, 0, 0, 6, 12, 10, 11, 1, 7, 13, 13, 8,\n  15, 9, 1, 4, 3, 5, 14, 11, 5, 12, 2, 7, 8, 2, 4, 14,\n\n  2, 14, 12, 11, 4, 2, 1, 12, 7, 4, 10, 7, 11, 13, 6, 1,\n  8, 5, 5, 0, 3, 15, 15, 10, 13, 3, 0, 9, 14, 8, 9, 6,\n  4, 11, 2, 8, 1, 12, 11, 7, 10, 1, 13, 14, 7, 2, 8, 13,\n  15, 6, 9, 15, 12, 0, 5, 9, 6, 10, 3, 4, 0, 5, 14, 3,\n\n  12, 10, 1, 15, 10, 4, 15, 2, 9, 7, 2, 12, 6, 9, 8, 5,\n  0, 6, 13, 1, 3, 13, 4, 14, 14, 0, 7, 11, 5, 3, 11, 8,\n  9, 4, 14, 3, 15, 2, 5, 12, 2, 9, 8, 5, 12, 15, 3, 10,\n  7, 11, 0, 14, 4, 1, 10, 7, 1, 6, 13, 0, 11, 8, 6, 13,\n\n  4, 13, 11, 0, 2, 11, 14, 7, 15, 4, 0, 9, 8, 1, 13, 10,\n  3, 14, 12, 3, 9, 5, 7, 12, 5, 2, 10, 15, 6, 8, 1, 6,\n  1, 6, 4, 11, 11, 13, 13, 8, 12, 1, 3, 4, 7, 10, 14, 7,\n  10, 9, 15, 5, 6, 0, 8, 15, 0, 14, 5, 2, 9, 3, 2, 12,\n\n  13, 1, 2, 15, 8, 13, 4, 8, 6, 10, 15, 3, 11, 7, 1, 4,\n  10, 12, 9, 5, 3, 6, 14, 11, 5, 0, 0, 14, 12, 9, 7, 2,\n  7, 2, 11, 1, 4, 14, 1, 7, 9, 4, 12, 10, 14, 8, 2, 13,\n  0, 15, 6, 12, 10, 9, 13, 0, 15, 3, 3, 5, 5, 6, 8, 11\n];\n\nexports.substitute = function substitute(inL, inR) {\n  var out = 0;\n  for (var i = 0; i < 4; i++) {\n    var b = (inL >>> (18 - i * 6)) & 0x3f;\n    var sb = sTable[i * 0x40 + b];\n\n    out <<= 4;\n    out |= sb;\n  }\n  for (var i = 0; i < 4; i++) {\n    var b = (inR >>> (18 - i * 6)) & 0x3f;\n    var sb = sTable[4 * 0x40 + i * 0x40 + b];\n\n    out <<= 4;\n    out |= sb;\n  }\n  return out >>> 0;\n};\n\nvar permuteTable = [\n  16, 25, 12, 11, 3, 20, 4, 15, 31, 17, 9, 6, 27, 14, 1, 22,\n  30, 24, 8, 18, 0, 5, 29, 23, 13, 19, 2, 26, 10, 21, 28, 7\n];\n\nexports.permute = function permute(num) {\n  var out = 0;\n  for (var i = 0; i < permuteTable.length; i++) {\n    out <<= 1;\n    out |= (num >>> permuteTable[i]) & 0x1;\n  }\n  return out >>> 0;\n};\n\nexports.padSplit = function padSplit(num, size, group) {\n  var str = num.toString(2);\n  while (str.length < size)\n    str = '0' + str;\n\n  var out = [];\n  for (var i = 0; i < size; i += group)\n    out.push(str.slice(i, i + group));\n  return out.join(' ');\n};\n","'use strict';\n// based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js\nvar maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1\nvar base = 36;\nvar tMin = 1;\nvar tMax = 26;\nvar skew = 38;\nvar damp = 700;\nvar initialBias = 72;\nvar initialN = 128; // 0x80\nvar delimiter = '-'; // '\\x2D'\nvar regexNonASCII = /[^\\0-\\u007E]/; // non-ASCII chars\nvar regexSeparators = /[.\\u3002\\uFF0E\\uFF61]/g; // RFC 3490 separators\nvar OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';\nvar baseMinusTMin = base - tMin;\nvar floor = Math.floor;\nvar stringFromCharCode = String.fromCharCode;\n\n/**\n * Creates an array containing the numeric code points of each Unicode\n * character in the string. While JavaScript uses UCS-2 internally,\n * this function will convert a pair of surrogate halves (each of which\n * UCS-2 exposes as separate characters) into a single code point,\n * matching UTF-16.\n */\nvar ucs2decode = function (string) {\n  var output = [];\n  var counter = 0;\n  var length = string.length;\n  while (counter < length) {\n    var value = string.charCodeAt(counter++);\n    if (value >= 0xD800 && value <= 0xDBFF && counter < length) {\n      // It's a high surrogate, and there is a next character.\n      var extra = string.charCodeAt(counter++);\n      if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.\n        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);\n      } else {\n        // It's an unmatched surrogate; only append this code unit, in case the\n        // next code unit is the high surrogate of a surrogate pair.\n        output.push(value);\n        counter--;\n      }\n    } else {\n      output.push(value);\n    }\n  }\n  return output;\n};\n\n/**\n * Converts a digit/integer into a basic code point.\n */\nvar digitToBasic = function (digit) {\n  //  0..25 map to ASCII a..z or A..Z\n  // 26..35 map to ASCII 0..9\n  return digit + 22 + 75 * (digit < 26);\n};\n\n/**\n * Bias adaptation function as per section 3.4 of RFC 3492.\n * https://tools.ietf.org/html/rfc3492#section-3.4\n */\nvar adapt = function (delta, numPoints, firstTime) {\n  var k = 0;\n  delta = firstTime ? floor(delta / damp) : delta >> 1;\n  delta += floor(delta / numPoints);\n  for (; delta > baseMinusTMin * tMax >> 1; k += base) {\n    delta = floor(delta / baseMinusTMin);\n  }\n  return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));\n};\n\n/**\n * Converts a string of Unicode symbols (e.g. a domain name label) to a\n * Punycode string of ASCII-only symbols.\n */\n// eslint-disable-next-line max-statements -- TODO\nvar encode = function (input) {\n  var output = [];\n\n  // Convert the input in UCS-2 to an array of Unicode code points.\n  input = ucs2decode(input);\n\n  // Cache the length.\n  var inputLength = input.length;\n\n  // Initialize the state.\n  var n = initialN;\n  var delta = 0;\n  var bias = initialBias;\n  var i, currentValue;\n\n  // Handle the basic code points.\n  for (i = 0; i < input.length; i++) {\n    currentValue = input[i];\n    if (currentValue < 0x80) {\n      output.push(stringFromCharCode(currentValue));\n    }\n  }\n\n  var basicLength = output.length; // number of basic code points.\n  var handledCPCount = basicLength; // number of code points that have been handled;\n\n  // Finish the basic string with a delimiter unless it's empty.\n  if (basicLength) {\n    output.push(delimiter);\n  }\n\n  // Main encoding loop:\n  while (handledCPCount < inputLength) {\n    // All non-basic code points < n have been handled already. Find the next larger one:\n    var m = maxInt;\n    for (i = 0; i < input.length; i++) {\n      currentValue = input[i];\n      if (currentValue >= n && currentValue < m) {\n        m = currentValue;\n      }\n    }\n\n    // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.\n    var handledCPCountPlusOne = handledCPCount + 1;\n    if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {\n      throw RangeError(OVERFLOW_ERROR);\n    }\n\n    delta += (m - n) * handledCPCountPlusOne;\n    n = m;\n\n    for (i = 0; i < input.length; i++) {\n      currentValue = input[i];\n      if (currentValue < n && ++delta > maxInt) {\n        throw RangeError(OVERFLOW_ERROR);\n      }\n      if (currentValue == n) {\n        // Represent delta as a generalized variable-length integer.\n        var q = delta;\n        for (var k = base; /* no condition */; k += base) {\n          var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);\n          if (q < t) break;\n          var qMinusT = q - t;\n          var baseMinusT = base - t;\n          output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));\n          q = floor(qMinusT / baseMinusT);\n        }\n\n        output.push(stringFromCharCode(digitToBasic(q)));\n        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);\n        delta = 0;\n        ++handledCPCount;\n      }\n    }\n\n    ++delta;\n    ++n;\n  }\n  return output.join('');\n};\n\nmodule.exports = function (input) {\n  var encoded = [];\n  var labels = input.toLowerCase().replace(regexSeparators, '\\u002E').split('.');\n  var i, label;\n  for (i = 0; i < labels.length; i++) {\n    label = labels[i];\n    encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);\n  }\n  return encoded.join('.');\n};\n","var classof = require('../internals/classof-raw');\nvar global = require('../internals/global');\n\nmodule.exports = classof(global.process) == 'process';\n","\n/**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\n\n/**\n * Parses a codec string to retrieve the number of codecs specified,\n * the video codec and object type indicator, and the audio profile.\n */\n\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\nvar parseCodecs = function parseCodecs() {\n  var codecs = arguments.length <= 0 || arguments[0] === undefined ? '' : arguments[0];\n\n  var result = {\n    codecCount: 0\n  };\n  var parsed = undefined;\n\n  result.codecCount = codecs.split(',').length;\n  result.codecCount = result.codecCount || 2;\n\n  // parse the video codec\n  parsed = /(^|\\s|,)+(avc1)([^ ,]*)/i.exec(codecs);\n  if (parsed) {\n    result.videoCodec = parsed[2];\n    result.videoObjectTypeIndicator = parsed[3];\n  }\n\n  // parse the last field of the audio codec\n  result.audioProfile = /(^|\\s|,)+mp4a.[0-9A-Fa-f]+\\.([0-9A-Fa-f]+)/i.exec(codecs);\n  result.audioProfile = result.audioProfile && result.audioProfile[2];\n\n  return result;\n};\nexports.parseCodecs = parseCodecs;","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar fails = require('../internals/fails');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar toObject = require('../internals/to-object');\nvar IndexedObject = require('../internals/indexed-object');\n\n// eslint-disable-next-line es/no-object-assign -- safe\nvar $assign = Object.assign;\n// eslint-disable-next-line es/no-object-defineproperty -- required for testing\nvar defineProperty = Object.defineProperty;\n\n// `Object.assign` method\n// https://tc39.es/ecma262/#sec-object.assign\nmodule.exports = !$assign || fails(function () {\n  // should have correct order of operations (Edge bug)\n  if (DESCRIPTORS && $assign({ b: 1 }, $assign(defineProperty({}, 'a', {\n    enumerable: true,\n    get: function () {\n      defineProperty(this, 'b', {\n        value: 3,\n        enumerable: false\n      });\n    }\n  }), { b: 2 })).b !== 1) return true;\n  // should work with symbols and should have deterministic property order (V8 bug)\n  var A = {};\n  var B = {};\n  // eslint-disable-next-line es/no-symbol -- safe\n  var symbol = Symbol();\n  var alphabet = 'abcdefghijklmnopqrst';\n  A[symbol] = 7;\n  alphabet.split('').forEach(function (chr) { B[chr] = chr; });\n  return $assign({}, A)[symbol] != 7 || objectKeys($assign({}, B)).join('') != alphabet;\n}) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`\n  var T = toObject(target);\n  var argumentsLength = arguments.length;\n  var index = 1;\n  var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;\n  var propertyIsEnumerable = propertyIsEnumerableModule.f;\n  while (argumentsLength > index) {\n    var S = IndexedObject(arguments[index++]);\n    var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);\n    var length = keys.length;\n    var j = 0;\n    var key;\n    while (length > j) {\n      key = keys[j++];\n      if (!DESCRIPTORS || propertyIsEnumerable.call(S, key)) T[key] = S[key];\n    }\n  } return T;\n} : $assign;\n","import getBoundingClientRect from \"./getBoundingClientRect.js\";\nimport getDocumentElement from \"./getDocumentElement.js\";\nimport getWindowScroll from \"./getWindowScroll.js\";\nexport default function getWindowScrollBarX(element) {\n  // If <html> has a CSS width greater than the viewport, then this will be\n  // incorrect for RTL.\n  // Popper 1 is broken in this case and never had a bug report so let's assume\n  // it's not an issue. I don't think anyone ever specifies width on <html>\n  // anyway.\n  // Browsers where the left scrollbar doesn't cause an issue report `0` for\n  // this (e.g. Edge 2019, IE11, Safari)\n  return getBoundingClientRect(getDocumentElement(element)).left + getWindowScroll(element).scrollLeft;\n}","'use strict';\n\nconst inherits = require('inherits');\nconst Reporter = require('../base/reporter').Reporter;\nconst Buffer = require('safer-buffer').Buffer;\n\nfunction DecoderBuffer(base, options) {\n  Reporter.call(this, options);\n  if (!Buffer.isBuffer(base)) {\n    this.error('Input not Buffer');\n    return;\n  }\n\n  this.base = base;\n  this.offset = 0;\n  this.length = base.length;\n}\ninherits(DecoderBuffer, Reporter);\nexports.DecoderBuffer = DecoderBuffer;\n\nDecoderBuffer.isDecoderBuffer = function isDecoderBuffer(data) {\n  if (data instanceof DecoderBuffer) {\n    return true;\n  }\n\n  // Or accept compatible API\n  const isCompatible = typeof data === 'object' &&\n    Buffer.isBuffer(data.base) &&\n    data.constructor.name === 'DecoderBuffer' &&\n    typeof data.offset === 'number' &&\n    typeof data.length === 'number' &&\n    typeof data.save === 'function' &&\n    typeof data.restore === 'function' &&\n    typeof data.isEmpty === 'function' &&\n    typeof data.readUInt8 === 'function' &&\n    typeof data.skip === 'function' &&\n    typeof data.raw === 'function';\n\n  return isCompatible;\n};\n\nDecoderBuffer.prototype.save = function save() {\n  return { offset: this.offset, reporter: Reporter.prototype.save.call(this) };\n};\n\nDecoderBuffer.prototype.restore = function restore(save) {\n  // Return skipped data\n  const res = new DecoderBuffer(this.base);\n  res.offset = save.offset;\n  res.length = this.offset;\n\n  this.offset = save.offset;\n  Reporter.prototype.restore.call(this, save.reporter);\n\n  return res;\n};\n\nDecoderBuffer.prototype.isEmpty = function isEmpty() {\n  return this.offset === this.length;\n};\n\nDecoderBuffer.prototype.readUInt8 = function readUInt8(fail) {\n  if (this.offset + 1 <= this.length)\n    return this.base.readUInt8(this.offset++, true);\n  else\n    return this.error(fail || 'DecoderBuffer overrun');\n};\n\nDecoderBuffer.prototype.skip = function skip(bytes, fail) {\n  if (!(this.offset + bytes <= this.length))\n    return this.error(fail || 'DecoderBuffer overrun');\n\n  const res = new DecoderBuffer(this.base);\n\n  // Share reporter state\n  res._reporterState = this._reporterState;\n\n  res.offset = this.offset;\n  res.length = this.offset + bytes;\n  this.offset += bytes;\n  return res;\n};\n\nDecoderBuffer.prototype.raw = function raw(save) {\n  return this.base.slice(save ? save.offset : this.offset, this.length);\n};\n\nfunction EncoderBuffer(value, reporter) {\n  if (Array.isArray(value)) {\n    this.length = 0;\n    this.value = value.map(function(item) {\n      if (!EncoderBuffer.isEncoderBuffer(item))\n        item = new EncoderBuffer(item, reporter);\n      this.length += item.length;\n      return item;\n    }, this);\n  } else if (typeof value === 'number') {\n    if (!(0 <= value && value <= 0xff))\n      return reporter.error('non-byte EncoderBuffer value');\n    this.value = value;\n    this.length = 1;\n  } else if (typeof value === 'string') {\n    this.value = value;\n    this.length = Buffer.byteLength(value);\n  } else if (Buffer.isBuffer(value)) {\n    this.value = value;\n    this.length = value.length;\n  } else {\n    return reporter.error('Unsupported type: ' + typeof value);\n  }\n}\nexports.EncoderBuffer = EncoderBuffer;\n\nEncoderBuffer.isEncoderBuffer = function isEncoderBuffer(data) {\n  if (data instanceof EncoderBuffer) {\n    return true;\n  }\n\n  // Or accept compatible API\n  const isCompatible = typeof data === 'object' &&\n    data.constructor.name === 'EncoderBuffer' &&\n    typeof data.length === 'number' &&\n    typeof data.join === 'function';\n\n  return isCompatible;\n};\n\nEncoderBuffer.prototype.join = function join(out, offset) {\n  if (!out)\n    out = Buffer.alloc(this.length);\n  if (!offset)\n    offset = 0;\n\n  if (this.length === 0)\n    return out;\n\n  if (Array.isArray(this.value)) {\n    this.value.forEach(function(item) {\n      item.join(out, offset);\n      offset += item.length;\n    });\n  } else {\n    if (typeof this.value === 'number')\n      out[offset] = this.value;\n    else if (typeof this.value === 'string')\n      out.write(this.value, offset);\n    else if (Buffer.isBuffer(this.value))\n      this.value.copy(out, offset);\n    offset += this.length;\n  }\n\n  return out;\n};\n","var Buffer = require('safe-buffer').Buffer\n\nfunction encryptByte (self, byteParam, decrypt) {\n  var pad = self._cipher.encryptBlock(self._prev)\n  var out = pad[0] ^ byteParam\n\n  self._prev = Buffer.concat([\n    self._prev.slice(1),\n    Buffer.from([decrypt ? byteParam : out])\n  ])\n\n  return out\n}\n\nexports.encrypt = function (self, chunk, decrypt) {\n  var len = chunk.length\n  var out = Buffer.allocUnsafe(len)\n  var i = -1\n\n  while (++i < len) {\n    out[i] = encryptByte(self, chunk[i], decrypt)\n  }\n\n  return out\n}\n","/*! @name @videojs/http-streaming @version 2.16.2 @license Apache-2.0 */\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport document from 'global/document';\nimport window$1 from 'global/window';\nimport _resolveUrl from '@videojs/vhs-utils/es/resolve-url.js';\nimport videojs from 'video.js';\nimport _extends from '@babel/runtime/helpers/extends';\nimport { Parser } from 'm3u8-parser';\nimport { isAudioCodec, translateLegacyCodec, codecsFromDefault, parseCodecs, getMimeForCodec, DEFAULT_VIDEO_CODEC, DEFAULT_AUDIO_CODEC, browserSupportsCodec, muxerSupportsCodec } from '@videojs/vhs-utils/es/codecs.js';\nimport { simpleTypeFromSourceType } from '@videojs/vhs-utils/es/media-types.js';\nexport { simpleTypeFromSourceType } from '@videojs/vhs-utils/es/media-types.js';\nimport { isArrayBufferView, concatTypedArrays, stringToBytes, toUint8 } from '@videojs/vhs-utils/es/byte-helpers';\nimport { generateSidxKey, parseUTCTiming, parse, addSidxSegmentsToPlaylist } from 'mpd-parser';\nimport parseSidx from 'mux.js/lib/tools/parse-sidx';\nimport { getId3Offset } from '@videojs/vhs-utils/es/id3-helpers';\nimport { detectContainerForBytes, isLikelyFmp4MediaSegment } from '@videojs/vhs-utils/es/containers';\nimport { ONE_SECOND_IN_TS } from 'mux.js/lib/utils/clock';\nimport _wrapNativeSuper from '@babel/runtime/helpers/wrapNativeSuper';\n\n/**\n * @file resolve-url.js - Handling how URLs are resolved and manipulated\n */\nvar resolveUrl = _resolveUrl;\n/**\n * Checks whether xhr request was redirected and returns correct url depending\n * on `handleManifestRedirects` option\n *\n * @api private\n *\n * @param  {string} url - an url being requested\n * @param  {XMLHttpRequest} req - xhr request result\n *\n * @return {string}\n */\n\nvar resolveManifestRedirect = function resolveManifestRedirect(handleManifestRedirect, url, req) {\n  // To understand how the responseURL below is set and generated:\n  // - https://fetch.spec.whatwg.org/#concept-response-url\n  // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling\n  if (handleManifestRedirect && req && req.responseURL && url !== req.responseURL) {\n    return req.responseURL;\n  }\n\n  return url;\n};\n\nvar logger = function logger(source) {\n  if (videojs.log.debug) {\n    return videojs.log.debug.bind(videojs, 'VHS:', source + \" >\");\n  }\n\n  return function () {};\n};\n\n/**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n\nvar TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range\n// can be misleading because of precision differences or when the current media has poorly\n// aligned audio and video, which can cause values to be slightly off from what you would\n// expect. This value is what we consider to be safe to use in such comparisons to account\n// for these scenarios.\n\nvar SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n\nvar filterRanges = function filterRanges(timeRanges, predicate) {\n  var results = [];\n  var i;\n\n  if (timeRanges && timeRanges.length) {\n    // Search for ranges that match the predicate\n    for (i = 0; i < timeRanges.length; i++) {\n      if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n        results.push([timeRanges.start(i), timeRanges.end(i)]);\n      }\n    }\n  }\n\n  return videojs.createTimeRanges(results);\n};\n/**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n *\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time  - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object\n */\n\n\nvar findRange = function findRange(buffered, time) {\n  return filterRanges(buffered, function (start, end) {\n    return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;\n  });\n};\n/**\n * Returns the TimeRanges that begin later than the specified time.\n *\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object.\n */\n\nvar findNextRange = function findNextRange(timeRanges, time) {\n  return filterRanges(timeRanges, function (start) {\n    return start - TIME_FUDGE_FACTOR >= time;\n  });\n};\n/**\n * Returns gaps within a list of TimeRanges\n *\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\n\nvar findGaps = function findGaps(buffered) {\n  if (buffered.length < 2) {\n    return videojs.createTimeRanges();\n  }\n\n  var ranges = [];\n\n  for (var i = 1; i < buffered.length; i++) {\n    var start = buffered.end(i - 1);\n    var end = buffered.start(i);\n    ranges.push([start, end]);\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Calculate the intersection of two TimeRanges\n *\n * @param {TimeRanges} bufferA\n * @param {TimeRanges} bufferB\n * @return {TimeRanges} The interesection of `bufferA` with `bufferB`\n */\n\nvar bufferIntersection = function bufferIntersection(bufferA, bufferB) {\n  var start = null;\n  var end = null;\n  var arity = 0;\n  var extents = [];\n  var ranges = [];\n\n  if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {\n    return videojs.createTimeRange();\n  } // Handle the case where we have both buffers and create an\n  // intersection of the two\n\n\n  var count = bufferA.length; // A) Gather up all start and end times\n\n  while (count--) {\n    extents.push({\n      time: bufferA.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferA.end(count),\n      type: 'end'\n    });\n  }\n\n  count = bufferB.length;\n\n  while (count--) {\n    extents.push({\n      time: bufferB.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferB.end(count),\n      type: 'end'\n    });\n  } // B) Sort them by time\n\n\n  extents.sort(function (a, b) {\n    return a.time - b.time;\n  }); // C) Go along one by one incrementing arity for start and decrementing\n  //    arity for ends\n\n  for (count = 0; count < extents.length; count++) {\n    if (extents[count].type === 'start') {\n      arity++; // D) If arity is ever incremented to 2 we are entering an\n      //    overlapping range\n\n      if (arity === 2) {\n        start = extents[count].time;\n      }\n    } else if (extents[count].type === 'end') {\n      arity--; // E) If arity is ever decremented to 1 we leaving an\n      //    overlapping range\n\n      if (arity === 1) {\n        end = extents[count].time;\n      }\n    } // F) Record overlapping ranges\n\n\n    if (start !== null && end !== null) {\n      ranges.push([start, end]);\n      start = null;\n      end = null;\n    }\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @return {string} a human readable string\n */\n\nvar printableRange = function printableRange(range) {\n  var strArr = [];\n\n  if (!range || !range.length) {\n    return '';\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    strArr.push(range.start(i) + ' => ' + range.end(i));\n  }\n\n  return strArr.join(', ');\n};\n/**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n *        The state of the buffer\n * @param {Numnber} currentTime\n *        The current time of the player\n * @param {number} playbackRate\n *        The current playback rate of the player. Defaults to 1.\n * @return {number}\n *         Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\n\nvar timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime, playbackRate) {\n  if (playbackRate === void 0) {\n    playbackRate = 1;\n  }\n\n  var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n  return (bufferedEnd - currentTime) / playbackRate;\n};\n/**\n * Converts a TimeRanges object into an array representation\n *\n * @param {TimeRanges} timeRanges\n * @return {Array}\n */\n\nvar timeRangesToArray = function timeRangesToArray(timeRanges) {\n  var timeRangesList = [];\n\n  for (var i = 0; i < timeRanges.length; i++) {\n    timeRangesList.push({\n      start: timeRanges.start(i),\n      end: timeRanges.end(i)\n    });\n  }\n\n  return timeRangesList;\n};\n/**\n * Determines if two time range objects are different.\n *\n * @param {TimeRange} a\n *        the first time range object to check\n *\n * @param {TimeRange} b\n *        the second time range object to check\n *\n * @return {Boolean}\n *         Whether the time range objects differ\n */\n\nvar isRangeDifferent = function isRangeDifferent(a, b) {\n  // same object\n  if (a === b) {\n    return false;\n  } // one or the other is undefined\n\n\n  if (!a && b || !b && a) {\n    return true;\n  } // length is different\n\n\n  if (a.length !== b.length) {\n    return true;\n  } // see if any start/end pair is different\n\n\n  for (var i = 0; i < a.length; i++) {\n    if (a.start(i) !== b.start(i) || a.end(i) !== b.end(i)) {\n      return true;\n    }\n  } // if the length and every pair is the same\n  // this is the same time range\n\n\n  return false;\n};\nvar lastBufferedEnd = function lastBufferedEnd(a) {\n  if (!a || !a.length || !a.end) {\n    return;\n  }\n\n  return a.end(a.length - 1);\n};\n/**\n * A utility function to add up the amount of time in a timeRange\n * after a specified startTime.\n * ie:[[0, 10], [20, 40], [50, 60]] with a startTime 0\n *     would return 40 as there are 40s seconds after 0 in the timeRange\n *\n * @param {TimeRange} range\n *        The range to check against\n * @param {number} startTime\n *        The time in the time range that you should start counting from\n *\n * @return {number}\n *          The number of seconds in the buffer passed the specified time.\n */\n\nvar timeAheadOf = function timeAheadOf(range, startTime) {\n  var time = 0;\n\n  if (!range || !range.length) {\n    return time;\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    var start = range.start(i);\n    var end = range.end(i); // startTime is after this range entirely\n\n    if (startTime > end) {\n      continue;\n    } // startTime is within this range\n\n\n    if (startTime > start && startTime <= end) {\n      time += end - startTime;\n      continue;\n    } // startTime is before this range.\n\n\n    time += end - start;\n  }\n\n  return time;\n};\n\n/**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\nvar createTimeRange = videojs.createTimeRange;\n/**\n * Get the duration of a segment, with special cases for\n * llhls segments that do not have a duration yet.\n *\n * @param {Object} playlist\n *        the playlist that the segment belongs to.\n * @param {Object} segment\n *        the segment to get a duration for.\n *\n * @return {number}\n *          the segment duration\n */\n\nvar segmentDurationWithParts = function segmentDurationWithParts(playlist, segment) {\n  // if this isn't a preload segment\n  // then we will have a segment duration that is accurate.\n  if (!segment.preload) {\n    return segment.duration;\n  } // otherwise we have to add up parts and preload hints\n  // to get an up to date duration.\n\n\n  var result = 0;\n  (segment.parts || []).forEach(function (p) {\n    result += p.duration;\n  }); // for preload hints we have to use partTargetDuration\n  // as they won't even have a duration yet.\n\n  (segment.preloadHints || []).forEach(function (p) {\n    if (p.type === 'PART') {\n      result += playlist.partTargetDuration;\n    }\n  });\n  return result;\n};\n/**\n * A function to get a combined list of parts and segments with durations\n * and indexes.\n *\n * @param {Playlist} playlist the playlist to get the list for.\n *\n * @return {Array} The part/segment list.\n */\n\nvar getPartsAndSegments = function getPartsAndSegments(playlist) {\n  return (playlist.segments || []).reduce(function (acc, segment, si) {\n    if (segment.parts) {\n      segment.parts.forEach(function (part, pi) {\n        acc.push({\n          duration: part.duration,\n          segmentIndex: si,\n          partIndex: pi,\n          part: part,\n          segment: segment\n        });\n      });\n    } else {\n      acc.push({\n        duration: segment.duration,\n        segmentIndex: si,\n        partIndex: null,\n        segment: segment,\n        part: null\n      });\n    }\n\n    return acc;\n  }, []);\n};\nvar getLastParts = function getLastParts(media) {\n  var lastSegment = media.segments && media.segments.length && media.segments[media.segments.length - 1];\n  return lastSegment && lastSegment.parts || [];\n};\nvar getKnownPartCount = function getKnownPartCount(_ref) {\n  var preloadSegment = _ref.preloadSegment;\n\n  if (!preloadSegment) {\n    return;\n  }\n\n  var parts = preloadSegment.parts,\n      preloadHints = preloadSegment.preloadHints;\n  var partCount = (preloadHints || []).reduce(function (count, hint) {\n    return count + (hint.type === 'PART' ? 1 : 0);\n  }, 0);\n  partCount += parts && parts.length ? parts.length : 0;\n  return partCount;\n};\n/**\n * Get the number of seconds to delay from the end of a\n * live playlist.\n *\n * @param {Playlist} master the master playlist\n * @param {Playlist} media the media playlist\n * @return {number} the hold back in seconds.\n */\n\nvar liveEdgeDelay = function liveEdgeDelay(master, media) {\n  if (media.endList) {\n    return 0;\n  } // dash suggestedPresentationDelay trumps everything\n\n\n  if (master && master.suggestedPresentationDelay) {\n    return master.suggestedPresentationDelay;\n  }\n\n  var hasParts = getLastParts(media).length > 0; // look for \"part\" delays from ll-hls first\n\n  if (hasParts && media.serverControl && media.serverControl.partHoldBack) {\n    return media.serverControl.partHoldBack;\n  } else if (hasParts && media.partTargetDuration) {\n    return media.partTargetDuration * 3; // finally look for full segment delays\n  } else if (media.serverControl && media.serverControl.holdBack) {\n    return media.serverControl.holdBack;\n  } else if (media.targetDuration) {\n    return media.targetDuration * 3;\n  }\n\n  return 0;\n};\n/**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\nvar backwardDuration = function backwardDuration(playlist, endSequence) {\n  var result = 0;\n  var i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following\n  // the interval, use it\n\n  var segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline\n  // information that is earlier than endSequence\n\n  if (segment) {\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start,\n        precise: true\n      };\n    }\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - segment.duration,\n        precise: true\n      };\n    }\n  }\n\n  while (i--) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: result + segment.end,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: result + segment.start,\n        precise: true\n      };\n    }\n  }\n\n  return {\n    result: result,\n    precise: false\n  };\n};\n/**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar forwardDuration = function forwardDuration(playlist, endSequence) {\n  var result = 0;\n  var segment;\n  var i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline\n  // information\n\n  for (; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start - result,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - result,\n        precise: true\n      };\n    }\n  } // indicate we didn't find a useful duration estimate\n\n\n  return {\n    result: -1,\n    precise: false\n  };\n};\n/**\n  * Calculate the media duration from the segments associated with a\n  * playlist. The duration of a subinterval of the available segments\n  * may be calculated by specifying an end index.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper boundary\n  * for the playlist.  Defaults to playlist length.\n  * @param {number} expired the amount of time that has dropped\n  * off the front of the playlist in a live scenario\n  * @return {number} the duration between the first available segment\n  * and end index.\n  */\n\n\nvar intervalDuration = function intervalDuration(playlist, endSequence, expired) {\n  if (typeof endSequence === 'undefined') {\n    endSequence = playlist.mediaSequence + playlist.segments.length;\n  }\n\n  if (endSequence < playlist.mediaSequence) {\n    return 0;\n  } // do a backward walk to estimate the duration\n\n\n  var backward = backwardDuration(playlist, endSequence);\n\n  if (backward.precise) {\n    // if we were able to base our duration estimate on timing\n    // information provided directly from the Media Source, return\n    // it\n    return backward.result;\n  } // walk forward to see if a precise duration estimate can be made\n  // that way\n\n\n  var forward = forwardDuration(playlist, endSequence);\n\n  if (forward.precise) {\n    // we found a segment that has been buffered and so it's\n    // position is known precisely\n    return forward.result;\n  } // return the less-precise, playlist-based duration estimate\n\n\n  return backward.result + expired;\n};\n/**\n  * Calculates the duration of a playlist. If a start and end index\n  * are specified, the duration will be for the subset of the media\n  * timeline between those two indices. The total duration for live\n  * playlists is always Infinity.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper\n  * boundary for the playlist. Defaults to the playlist media\n  * sequence number plus its length.\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {number} the duration between the start index and end\n  * index.\n  */\n\n\nvar duration = function duration(playlist, endSequence, expired) {\n  if (!playlist) {\n    return 0;\n  }\n\n  if (typeof expired !== 'number') {\n    expired = 0;\n  } // if a slice of the total duration is not requested, use\n  // playlist-level duration indicators when they're present\n\n\n  if (typeof endSequence === 'undefined') {\n    // if present, use the duration specified in the playlist\n    if (playlist.totalDuration) {\n      return playlist.totalDuration;\n    } // duration should be Infinity for live playlists\n\n\n    if (!playlist.endList) {\n      return window$1.Infinity;\n    }\n  } // calculate the total duration based on the segment durations\n\n\n  return intervalDuration(playlist, endSequence, expired);\n};\n/**\n  * Calculate the time between two indexes in the current playlist\n  * neight the start- nor the end-index need to be within the current\n  * playlist in which case, the targetDuration of the playlist is used\n  * to approximate the durations of the segments\n  *\n  * @param {Array} options.durationList list to iterate over for durations.\n  * @param {number} options.defaultDuration duration to use for elements before or after the durationList\n  * @param {number} options.startIndex partsAndSegments index to start\n  * @param {number} options.endIndex partsAndSegments index to end.\n  * @return {number} the number of seconds between startIndex and endIndex\n  */\n\nvar sumDurations = function sumDurations(_ref2) {\n  var defaultDuration = _ref2.defaultDuration,\n      durationList = _ref2.durationList,\n      startIndex = _ref2.startIndex,\n      endIndex = _ref2.endIndex;\n  var durations = 0;\n\n  if (startIndex > endIndex) {\n    var _ref3 = [endIndex, startIndex];\n    startIndex = _ref3[0];\n    endIndex = _ref3[1];\n  }\n\n  if (startIndex < 0) {\n    for (var i = startIndex; i < Math.min(0, endIndex); i++) {\n      durations += defaultDuration;\n    }\n\n    startIndex = 0;\n  }\n\n  for (var _i = startIndex; _i < endIndex; _i++) {\n    durations += durationList[_i].duration;\n  }\n\n  return durations;\n};\n/**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} expired the amount of time that has\n *                  dropped off the front of the playlist in a live scenario\n * @param {boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n *                        playlist end calculation should consider the safe live end\n *                        (truncate the playlist end by three segments). This is normally\n *                        used for calculating the end of the playlist's seekable range.\n *                        This takes into account the value of liveEdgePadding.\n *                        Setting liveEdgePadding to 0 is equivalent to setting this to false.\n * @param {number} liveEdgePadding a number indicating how far from the end of the playlist we should be in seconds.\n *                 If this is provided, it is used in the safe live end calculation.\n *                 Setting useSafeLiveEnd=false or liveEdgePadding=0 are equivalent.\n *                 Corresponds to suggestedPresentationDelay in DASH manifests.\n * @return {number} the end time of playlist\n * @function playlistEnd\n */\n\nvar playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding) {\n  if (!playlist || !playlist.segments) {\n    return null;\n  }\n\n  if (playlist.endList) {\n    return duration(playlist);\n  }\n\n  if (expired === null) {\n    return null;\n  }\n\n  expired = expired || 0;\n  var lastSegmentEndTime = intervalDuration(playlist, playlist.mediaSequence + playlist.segments.length, expired);\n\n  if (useSafeLiveEnd) {\n    liveEdgePadding = typeof liveEdgePadding === 'number' ? liveEdgePadding : liveEdgeDelay(null, playlist);\n    lastSegmentEndTime -= liveEdgePadding;\n  } // don't return a time less than zero\n\n\n  return Math.max(0, lastSegmentEndTime);\n};\n/**\n  * Calculates the interval of time that is currently seekable in a\n  * playlist. The returned time ranges are relative to the earliest\n  * moment in the specified playlist that is still available. A full\n  * seekable implementation for live streams would need to offset\n  * these values by the duration of content that has expired from the\n  * stream.\n  *\n  * @param {Object} playlist a media playlist object\n  * dropped off the front of the playlist in a live scenario\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @param {number} liveEdgePadding how far from the end of the playlist we should be in seconds.\n  *        Corresponds to suggestedPresentationDelay in DASH manifests.\n  * @return {TimeRanges} the periods of time that are valid targets\n  * for seeking\n  */\n\nvar seekable = function seekable(playlist, expired, liveEdgePadding) {\n  var useSafeLiveEnd = true;\n  var seekableStart = expired || 0;\n  var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding);\n\n  if (seekableEnd === null) {\n    return createTimeRange();\n  }\n\n  return createTimeRange(seekableStart, seekableEnd);\n};\n/**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} options.playlist the media playlist to query\n * @param {number} options.currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {number} options.startTime the time when the segment/part starts\n * @param {number} options.startingSegmentIndex the segment index to start looking at.\n * @param {number?} [options.startingPartIndex] the part index to look at within the segment.\n *\n * @return {Object} an object with partIndex, segmentIndex, and startTime.\n */\n\nvar getMediaInfoForTime = function getMediaInfoForTime(_ref4) {\n  var playlist = _ref4.playlist,\n      currentTime = _ref4.currentTime,\n      startingSegmentIndex = _ref4.startingSegmentIndex,\n      startingPartIndex = _ref4.startingPartIndex,\n      startTime = _ref4.startTime,\n      experimentalExactManifestTimings = _ref4.experimentalExactManifestTimings;\n  var time = currentTime - startTime;\n  var partsAndSegments = getPartsAndSegments(playlist);\n  var startIndex = 0;\n\n  for (var i = 0; i < partsAndSegments.length; i++) {\n    var partAndSegment = partsAndSegments[i];\n\n    if (startingSegmentIndex !== partAndSegment.segmentIndex) {\n      continue;\n    } // skip this if part index does not match.\n\n\n    if (typeof startingPartIndex === 'number' && typeof partAndSegment.partIndex === 'number' && startingPartIndex !== partAndSegment.partIndex) {\n      continue;\n    }\n\n    startIndex = i;\n    break;\n  }\n\n  if (time < 0) {\n    // Walk backward from startIndex in the playlist, adding durations\n    // until we find a segment that contains `time` and return it\n    if (startIndex > 0) {\n      for (var _i2 = startIndex - 1; _i2 >= 0; _i2--) {\n        var _partAndSegment = partsAndSegments[_i2];\n        time += _partAndSegment.duration;\n\n        if (experimentalExactManifestTimings) {\n          if (time < 0) {\n            continue;\n          }\n        } else if (time + TIME_FUDGE_FACTOR <= 0) {\n          continue;\n        }\n\n        return {\n          partIndex: _partAndSegment.partIndex,\n          segmentIndex: _partAndSegment.segmentIndex,\n          startTime: startTime - sumDurations({\n            defaultDuration: playlist.targetDuration,\n            durationList: partsAndSegments,\n            startIndex: startIndex,\n            endIndex: _i2\n          })\n        };\n      }\n    } // We were unable to find a good segment within the playlist\n    // so select the first segment\n\n\n    return {\n      partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n      segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n      startTime: currentTime\n    };\n  } // When startIndex is negative, we first walk forward to first segment\n  // adding target durations. If we \"run out of time\" before getting to\n  // the first segment, return the first segment\n\n\n  if (startIndex < 0) {\n    for (var _i3 = startIndex; _i3 < 0; _i3++) {\n      time -= playlist.targetDuration;\n\n      if (time < 0) {\n        return {\n          partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n          segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n          startTime: currentTime\n        };\n      }\n    }\n\n    startIndex = 0;\n  } // Walk forward from startIndex in the playlist, subtracting durations\n  // until we find a segment that contains `time` and return it\n\n\n  for (var _i4 = startIndex; _i4 < partsAndSegments.length; _i4++) {\n    var _partAndSegment2 = partsAndSegments[_i4];\n    time -= _partAndSegment2.duration;\n\n    if (experimentalExactManifestTimings) {\n      if (time > 0) {\n        continue;\n      }\n    } else if (time - TIME_FUDGE_FACTOR >= 0) {\n      continue;\n    }\n\n    return {\n      partIndex: _partAndSegment2.partIndex,\n      segmentIndex: _partAndSegment2.segmentIndex,\n      startTime: startTime + sumDurations({\n        defaultDuration: playlist.targetDuration,\n        durationList: partsAndSegments,\n        startIndex: startIndex,\n        endIndex: _i4\n      })\n    };\n  } // We are out of possible candidates so load the last one...\n\n\n  return {\n    segmentIndex: partsAndSegments[partsAndSegments.length - 1].segmentIndex,\n    partIndex: partsAndSegments[partsAndSegments.length - 1].partIndex,\n    startTime: currentTime\n  };\n};\n/**\n * Check whether the playlist is blacklisted or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is blacklisted or not\n * @function isBlacklisted\n */\n\nvar isBlacklisted = function isBlacklisted(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n};\n/**\n * Check whether the playlist is compatible with current playback configuration or has\n * been blacklisted permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\n\nvar isIncompatible = function isIncompatible(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n};\n/**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\n\nvar isEnabled = function isEnabled(playlist) {\n  var blacklisted = isBlacklisted(playlist);\n  return !playlist.disabled && !blacklisted;\n};\n/**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\n\nvar isDisabled = function isDisabled(playlist) {\n  return playlist.disabled;\n};\n/**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {boolean} true if it's an AES encrypted HLS stream\n */\n\nvar isAes = function isAes(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].key) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {string} attr\n *        Attribute to check for\n * @param {Object} playlist\n *        The media playlist object\n * @return {boolean}\n *         Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\n\nvar hasAttribute = function hasAttribute(attr, playlist) {\n  return playlist.attributes && playlist.attributes[attr];\n};\n/**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {number} segmentDuration\n *        Duration of requested segment\n * @param {number} bandwidth\n *        Current measured bandwidth of the player\n * @param {Object} playlist\n *        The media playlist object\n * @param {number=} bytesReceived\n *        Number of bytes already received for the request. Defaults to 0\n * @return {number|NaN}\n *         The estimated time to request the segment. NaN if bandwidth information for\n *         the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\n\nvar estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist, bytesReceived) {\n  if (bytesReceived === void 0) {\n    bytesReceived = 0;\n  }\n\n  if (!hasAttribute('BANDWIDTH', playlist)) {\n    return NaN;\n  }\n\n  var size = segmentDuration * playlist.attributes.BANDWIDTH;\n  return (size - bytesReceived * 8) / bandwidth;\n};\n/*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\n\nvar isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {\n  if (master.playlists.length === 1) {\n    return true;\n  }\n\n  var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n  return master.playlists.filter(function (playlist) {\n    if (!isEnabled(playlist)) {\n      return false;\n    }\n\n    return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n  }).length === 0;\n};\nvar playlistMatch = function playlistMatch(a, b) {\n  // both playlits are null\n  // or only one playlist is non-null\n  // no match\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // playlist objects are the same, match\n\n\n  if (a === b) {\n    return true;\n  } // first try to use id as it should be the most\n  // accurate\n\n\n  if (a.id && b.id && a.id === b.id) {\n    return true;\n  } // next try to use reslovedUri as it should be the\n  // second most accurate.\n\n\n  if (a.resolvedUri && b.resolvedUri && a.resolvedUri === b.resolvedUri) {\n    return true;\n  } // finally try to use uri as it should be accurate\n  // but might miss a few cases for relative uris\n\n\n  if (a.uri && b.uri && a.uri === b.uri) {\n    return true;\n  }\n\n  return false;\n};\n\nvar someAudioVariant = function someAudioVariant(master, callback) {\n  var AUDIO = master && master.mediaGroups && master.mediaGroups.AUDIO || {};\n  var found = false;\n\n  for (var groupName in AUDIO) {\n    for (var label in AUDIO[groupName]) {\n      found = callback(AUDIO[groupName][label]);\n\n      if (found) {\n        break;\n      }\n    }\n\n    if (found) {\n      break;\n    }\n  }\n\n  return !!found;\n};\n\nvar isAudioOnly = function isAudioOnly(master) {\n  // we are audio only if we have no main playlists but do\n  // have media group playlists.\n  if (!master || !master.playlists || !master.playlists.length) {\n    // without audio variants or playlists this\n    // is not an audio only master.\n    var found = someAudioVariant(master, function (variant) {\n      return variant.playlists && variant.playlists.length || variant.uri;\n    });\n    return found;\n  } // if every playlist has only an audio codec it is audio only\n\n\n  var _loop = function _loop(i) {\n    var playlist = master.playlists[i];\n    var CODECS = playlist.attributes && playlist.attributes.CODECS; // all codecs are audio, this is an audio playlist.\n\n    if (CODECS && CODECS.split(',').every(function (c) {\n      return isAudioCodec(c);\n    })) {\n      return \"continue\";\n    } // playlist is in an audio group it is audio only\n\n\n    var found = someAudioVariant(master, function (variant) {\n      return playlistMatch(playlist, variant);\n    });\n\n    if (found) {\n      return \"continue\";\n    } // if we make it here this playlist isn't audio and we\n    // are not audio only\n\n\n    return {\n      v: false\n    };\n  };\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    var _ret = _loop(i);\n\n    if (_ret === \"continue\") continue;\n    if (typeof _ret === \"object\") return _ret.v;\n  } // if we make it past every playlist without returning, then\n  // this is an audio only playlist.\n\n\n  return true;\n}; // exports\n\nvar Playlist = {\n  liveEdgeDelay: liveEdgeDelay,\n  duration: duration,\n  seekable: seekable,\n  getMediaInfoForTime: getMediaInfoForTime,\n  isEnabled: isEnabled,\n  isDisabled: isDisabled,\n  isBlacklisted: isBlacklisted,\n  isIncompatible: isIncompatible,\n  playlistEnd: playlistEnd,\n  isAes: isAes,\n  hasAttribute: hasAttribute,\n  estimateSegmentRequestTime: estimateSegmentRequestTime,\n  isLowestEnabledRendition: isLowestEnabledRendition,\n  isAudioOnly: isAudioOnly,\n  playlistMatch: playlistMatch,\n  segmentDurationWithParts: segmentDurationWithParts\n};\n\nvar log = videojs.log;\nvar createPlaylistID = function createPlaylistID(index, uri) {\n  return index + \"-\" + uri;\n}; // default function for creating a group id\n\nvar groupID = function groupID(type, group, label) {\n  return \"placeholder-uri-\" + type + \"-\" + group + \"-\" + label;\n};\n/**\n * Parses a given m3u8 playlist\n *\n * @param {Function} [onwarn]\n *        a function to call when the parser triggers a warning event.\n * @param {Function} [oninfo]\n *        a function to call when the parser triggers an info event.\n * @param {string} manifestString\n *        The downloaded manifest string\n * @param {Object[]} [customTagParsers]\n *        An array of custom tag parsers for the m3u8-parser instance\n * @param {Object[]} [customTagMappers]\n *        An array of custom tag mappers for the m3u8-parser instance\n * @param {boolean} [experimentalLLHLS=false]\n *        Whether to keep ll-hls features in the manifest after parsing.\n * @return {Object}\n *         The manifest object\n */\n\n\nvar parseManifest = function parseManifest(_ref) {\n  var onwarn = _ref.onwarn,\n      oninfo = _ref.oninfo,\n      manifestString = _ref.manifestString,\n      _ref$customTagParsers = _ref.customTagParsers,\n      customTagParsers = _ref$customTagParsers === void 0 ? [] : _ref$customTagParsers,\n      _ref$customTagMappers = _ref.customTagMappers,\n      customTagMappers = _ref$customTagMappers === void 0 ? [] : _ref$customTagMappers,\n      experimentalLLHLS = _ref.experimentalLLHLS;\n  var parser = new Parser();\n\n  if (onwarn) {\n    parser.on('warn', onwarn);\n  }\n\n  if (oninfo) {\n    parser.on('info', oninfo);\n  }\n\n  customTagParsers.forEach(function (customParser) {\n    return parser.addParser(customParser);\n  });\n  customTagMappers.forEach(function (mapper) {\n    return parser.addTagMapper(mapper);\n  });\n  parser.push(manifestString);\n  parser.end();\n  var manifest = parser.manifest; // remove llhls features from the parsed manifest\n  // if we don't want llhls support.\n\n  if (!experimentalLLHLS) {\n    ['preloadSegment', 'skip', 'serverControl', 'renditionReports', 'partInf', 'partTargetDuration'].forEach(function (k) {\n      if (manifest.hasOwnProperty(k)) {\n        delete manifest[k];\n      }\n    });\n\n    if (manifest.segments) {\n      manifest.segments.forEach(function (segment) {\n        ['parts', 'preloadHints'].forEach(function (k) {\n          if (segment.hasOwnProperty(k)) {\n            delete segment[k];\n          }\n        });\n      });\n    }\n  }\n\n  if (!manifest.targetDuration) {\n    var targetDuration = 10;\n\n    if (manifest.segments && manifest.segments.length) {\n      targetDuration = manifest.segments.reduce(function (acc, s) {\n        return Math.max(acc, s.duration);\n      }, 0);\n    }\n\n    if (onwarn) {\n      onwarn(\"manifest has no targetDuration defaulting to \" + targetDuration);\n    }\n\n    manifest.targetDuration = targetDuration;\n  }\n\n  var parts = getLastParts(manifest);\n\n  if (parts.length && !manifest.partTargetDuration) {\n    var partTargetDuration = parts.reduce(function (acc, p) {\n      return Math.max(acc, p.duration);\n    }, 0);\n\n    if (onwarn) {\n      onwarn(\"manifest has no partTargetDuration defaulting to \" + partTargetDuration);\n      log.error('LL-HLS manifest has parts but lacks required #EXT-X-PART-INF:PART-TARGET value. See https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-09#section-4.4.3.7. Playback is not guaranteed.');\n    }\n\n    manifest.partTargetDuration = partTargetDuration;\n  }\n\n  return manifest;\n};\n/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {Function} callback\n *        Callback to call for each media group\n */\n\nvar forEachMediaGroup = function forEachMediaGroup(master, callback) {\n  if (!master.mediaGroups) {\n    return;\n  }\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {\n    if (!master.mediaGroups[mediaType]) {\n      return;\n    }\n\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};\n/**\n * Adds properties and attributes to the playlist to keep consistent functionality for\n * playlists throughout VHS.\n *\n * @param {Object} config\n *        Arguments object\n * @param {Object} config.playlist\n *        The media playlist\n * @param {string} [config.uri]\n *        The uri to the media playlist (if media playlist is not from within a master\n *        playlist)\n * @param {string} id\n *        ID to use for the playlist\n */\n\nvar setupMediaPlaylist = function setupMediaPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      uri = _ref2.uri,\n      id = _ref2.id;\n  playlist.id = id;\n  playlist.playlistErrors_ = 0;\n\n  if (uri) {\n    // For media playlists, m3u8-parser does not have access to a URI, as HLS media\n    // playlists do not contain their own source URI, but one is needed for consistency in\n    // VHS.\n    playlist.uri = uri;\n  } // For HLS master playlists, even though certain attributes MUST be defined, the\n  // stream may still be played without them.\n  // For HLS media playlists, m3u8-parser does not attach an attributes object to the\n  // manifest.\n  //\n  // To avoid undefined reference errors through the project, and make the code easier\n  // to write/read, add an empty attributes object for these cases.\n\n\n  playlist.attributes = playlist.attributes || {};\n};\n/**\n * Adds ID, resolvedUri, and attributes properties to each playlist of the master, where\n * necessary. In addition, creates playlist IDs for each playlist and adds playlist ID to\n * playlist references to the playlists array.\n *\n * @param {Object} master\n *        The master playlist\n */\n\nvar setupMediaPlaylists = function setupMediaPlaylists(master) {\n  var i = master.playlists.length;\n\n  while (i--) {\n    var playlist = master.playlists[i];\n    setupMediaPlaylist({\n      playlist: playlist,\n      id: createPlaylistID(i, playlist.uri)\n    });\n    playlist.resolvedUri = resolveUrl(master.uri, playlist.uri);\n    master.playlists[playlist.id] = playlist; // URI reference added for backwards compatibility\n\n    master.playlists[playlist.uri] = playlist; // Although the spec states an #EXT-X-STREAM-INF tag MUST have a BANDWIDTH attribute,\n    // the stream can be played without it. Although an attributes property may have been\n    // added to the playlist to prevent undefined references, issue a warning to fix the\n    // manifest.\n\n    if (!playlist.attributes.BANDWIDTH) {\n      log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n    }\n  }\n};\n/**\n * Adds resolvedUri properties to each media group.\n *\n * @param {Object} master\n *        The master playlist\n */\n\nvar resolveMediaGroupUris = function resolveMediaGroupUris(master) {\n  forEachMediaGroup(master, function (properties) {\n    if (properties.uri) {\n      properties.resolvedUri = resolveUrl(master.uri, properties.uri);\n    }\n  });\n};\n/**\n * Creates a master playlist wrapper to insert a sole media playlist into.\n *\n * @param {Object} media\n *        Media playlist\n * @param {string} uri\n *        The media URI\n *\n * @return {Object}\n *         Master playlist\n */\n\nvar masterForMedia = function masterForMedia(media, uri) {\n  var id = createPlaylistID(0, uri);\n  var master = {\n    mediaGroups: {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    },\n    uri: window$1.location.href,\n    resolvedUri: window$1.location.href,\n    playlists: [{\n      uri: uri,\n      id: id,\n      resolvedUri: uri,\n      // m3u8-parser does not attach an attributes property to media playlists so make\n      // sure that the property is attached to avoid undefined reference errors\n      attributes: {}\n    }]\n  }; // set up ID reference\n\n  master.playlists[id] = master.playlists[0]; // URI reference added for backwards compatibility\n\n  master.playlists[uri] = master.playlists[0];\n  return master;\n};\n/**\n * Does an in-place update of the master manifest to add updated playlist URI references\n * as well as other properties needed by VHS that aren't included by the parser.\n *\n * @param {Object} master\n *        Master manifest object\n * @param {string} uri\n *        The source URI\n * @param {function} createGroupID\n *        A function to determine how to create the groupID for mediaGroups\n */\n\nvar addPropertiesToMaster = function addPropertiesToMaster(master, uri, createGroupID) {\n  if (createGroupID === void 0) {\n    createGroupID = groupID;\n  }\n\n  master.uri = uri;\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    if (!master.playlists[i].uri) {\n      // Set up phony URIs for the playlists since playlists are referenced by their URIs\n      // throughout VHS, but some formats (e.g., DASH) don't have external URIs\n      // TODO: consider adding dummy URIs in mpd-parser\n      var phonyUri = \"placeholder-uri-\" + i;\n      master.playlists[i].uri = phonyUri;\n    }\n  }\n\n  var audioOnlyMaster = isAudioOnly(master);\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    // add a playlist array under properties\n    if (!properties.playlists || !properties.playlists.length) {\n      // If the manifest is audio only and this media group does not have a uri, check\n      // if the media group is located in the main list of playlists. If it is, don't add\n      // placeholder properties as it shouldn't be considered an alternate audio track.\n      if (audioOnlyMaster && mediaType === 'AUDIO' && !properties.uri) {\n        for (var _i = 0; _i < master.playlists.length; _i++) {\n          var p = master.playlists[_i];\n\n          if (p.attributes && p.attributes.AUDIO && p.attributes.AUDIO === groupKey) {\n            return;\n          }\n        }\n      }\n\n      properties.playlists = [_extends({}, properties)];\n    }\n\n    properties.playlists.forEach(function (p, i) {\n      var groupId = createGroupID(mediaType, groupKey, labelKey, p);\n      var id = createPlaylistID(i, groupId);\n\n      if (p.uri) {\n        p.resolvedUri = p.resolvedUri || resolveUrl(master.uri, p.uri);\n      } else {\n        // DEPRECATED, this has been added to prevent a breaking change.\n        // previously we only ever had a single media group playlist, so\n        // we mark the first playlist uri without prepending the index as we used to\n        // ideally we would do all of the playlists the same way.\n        p.uri = i === 0 ? groupId : id; // don't resolve a placeholder uri to an absolute url, just use\n        // the placeholder again\n\n        p.resolvedUri = p.uri;\n      }\n\n      p.id = p.id || id; // add an empty attributes object, all playlists are\n      // expected to have this.\n\n      p.attributes = p.attributes || {}; // setup ID and URI references (URI for backwards compatibility)\n\n      master.playlists[p.id] = p;\n      master.playlists[p.uri] = p;\n    });\n  });\n  setupMediaPlaylists(master);\n  resolveMediaGroupUris(master);\n};\n\nvar mergeOptions$2 = videojs.mergeOptions,\n    EventTarget$1 = videojs.EventTarget;\n\nvar addLLHLSQueryDirectives = function addLLHLSQueryDirectives(uri, media) {\n  if (media.endList || !media.serverControl) {\n    return uri;\n  }\n\n  var parameters = {};\n\n  if (media.serverControl.canBlockReload) {\n    var preloadSegment = media.preloadSegment; // next msn is a zero based value, length is not.\n\n    var nextMSN = media.mediaSequence + media.segments.length; // If preload segment has parts then it is likely\n    // that we are going to request a part of that preload segment.\n    // the logic below is used to determine that.\n\n    if (preloadSegment) {\n      var parts = preloadSegment.parts || []; // _HLS_part is a zero based index\n\n      var nextPart = getKnownPartCount(media) - 1; // if nextPart is > -1 and not equal to just the\n      // length of parts, then we know we had part preload hints\n      // and we need to add the _HLS_part= query\n\n      if (nextPart > -1 && nextPart !== parts.length - 1) {\n        // add existing parts to our preload hints\n        // eslint-disable-next-line\n        parameters._HLS_part = nextPart;\n      } // this if statement makes sure that we request the msn\n      // of the preload segment if:\n      // 1. the preload segment had parts (and was not yet a full segment)\n      //    but was added to our segments array\n      // 2. the preload segment had preload hints for parts that are not in\n      //    the manifest yet.\n      // in all other cases we want the segment after the preload segment\n      // which will be given by using media.segments.length because it is 1 based\n      // rather than 0 based.\n\n\n      if (nextPart > -1 || parts.length) {\n        nextMSN--;\n      }\n    } // add _HLS_msn= in front of any _HLS_part query\n    // eslint-disable-next-line\n\n\n    parameters._HLS_msn = nextMSN;\n  }\n\n  if (media.serverControl && media.serverControl.canSkipUntil) {\n    // add _HLS_skip= infront of all other queries.\n    // eslint-disable-next-line\n    parameters._HLS_skip = media.serverControl.canSkipDateranges ? 'v2' : 'YES';\n  }\n\n  if (Object.keys(parameters).length) {\n    var parsedUri = new window$1.URL(uri);\n    ['_HLS_skip', '_HLS_msn', '_HLS_part'].forEach(function (name) {\n      if (!parameters.hasOwnProperty(name)) {\n        return;\n      }\n\n      parsedUri.searchParams.set(name, parameters[name]);\n    });\n    uri = parsedUri.toString();\n  }\n\n  return uri;\n};\n/**\n * Returns a new segment object with properties and\n * the parts array merged.\n *\n * @param {Object} a the old segment\n * @param {Object} b the new segment\n *\n * @return {Object} the merged segment\n */\n\n\nvar updateSegment = function updateSegment(a, b) {\n  if (!a) {\n    return b;\n  }\n\n  var result = mergeOptions$2(a, b); // if only the old segment has preload hints\n  // and the new one does not, remove preload hints.\n\n  if (a.preloadHints && !b.preloadHints) {\n    delete result.preloadHints;\n  } // if only the old segment has parts\n  // then the parts are no longer valid\n\n\n  if (a.parts && !b.parts) {\n    delete result.parts; // if both segments have parts\n    // copy part propeties from the old segment\n    // to the new one.\n  } else if (a.parts && b.parts) {\n    for (var i = 0; i < b.parts.length; i++) {\n      if (a.parts && a.parts[i]) {\n        result.parts[i] = mergeOptions$2(a.parts[i], b.parts[i]);\n      }\n    }\n  } // set skipped to false for segments that have\n  // have had information merged from the old segment.\n\n\n  if (!a.skipped && b.skipped) {\n    result.skipped = false;\n  } // set preload to false for segments that have\n  // had information added in the new segment.\n\n\n  if (a.preload && !b.preload) {\n    result.preload = false;\n  }\n\n  return result;\n};\n/**\n * Returns a new array of segments that is the result of merging\n * properties from an older list of segments onto an updated\n * list. No properties on the updated playlist will be ovewritten.\n *\n * @param {Array} original the outdated list of segments\n * @param {Array} update the updated list of segments\n * @param {number=} offset the index of the first update\n * segment in the original segment list. For non-live playlists,\n * this should always be zero and does not need to be\n * specified. For live playlists, it should be the difference\n * between the media sequence numbers in the original and updated\n * playlists.\n * @return {Array} a list of merged segment objects\n */\n\nvar updateSegments = function updateSegments(original, update, offset) {\n  var oldSegments = original.slice();\n  var newSegments = update.slice();\n  offset = offset || 0;\n  var result = [];\n  var currentMap;\n\n  for (var newIndex = 0; newIndex < newSegments.length; newIndex++) {\n    var oldSegment = oldSegments[newIndex + offset];\n    var newSegment = newSegments[newIndex];\n\n    if (oldSegment) {\n      currentMap = oldSegment.map || currentMap;\n      result.push(updateSegment(oldSegment, newSegment));\n    } else {\n      // carry over map to new segment if it is missing\n      if (currentMap && !newSegment.map) {\n        newSegment.map = currentMap;\n      }\n\n      result.push(newSegment);\n    }\n  }\n\n  return result;\n};\nvar resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {\n  // preloadSegment will not have a uri at all\n  // as the segment isn't actually in the manifest yet, only parts\n  if (!segment.resolvedUri && segment.uri) {\n    segment.resolvedUri = resolveUrl(baseUri, segment.uri);\n  }\n\n  if (segment.key && !segment.key.resolvedUri) {\n    segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);\n  }\n\n  if (segment.map && !segment.map.resolvedUri) {\n    segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);\n  }\n\n  if (segment.map && segment.map.key && !segment.map.key.resolvedUri) {\n    segment.map.key.resolvedUri = resolveUrl(baseUri, segment.map.key.uri);\n  }\n\n  if (segment.parts && segment.parts.length) {\n    segment.parts.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n\n  if (segment.preloadHints && segment.preloadHints.length) {\n    segment.preloadHints.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n};\n\nvar getAllSegments = function getAllSegments(media) {\n  var segments = media.segments || [];\n  var preloadSegment = media.preloadSegment; // a preloadSegment with only preloadHints is not currently\n  // a usable segment, only include a preloadSegment that has\n  // parts.\n\n  if (preloadSegment && preloadSegment.parts && preloadSegment.parts.length) {\n    // if preloadHints has a MAP that means that the\n    // init segment is going to change. We cannot use any of the parts\n    // from this preload segment.\n    if (preloadSegment.preloadHints) {\n      for (var i = 0; i < preloadSegment.preloadHints.length; i++) {\n        if (preloadSegment.preloadHints[i].type === 'MAP') {\n          return segments;\n        }\n      }\n    } // set the duration for our preload segment to target duration.\n\n\n    preloadSegment.duration = media.targetDuration;\n    preloadSegment.preload = true;\n    segments.push(preloadSegment);\n  }\n\n  return segments;\n}; // consider the playlist unchanged if the playlist object is the same or\n// the number of segments is equal, the media sequence number is unchanged,\n// and this playlist hasn't become the end of the playlist\n\n\nvar isPlaylistUnchanged = function isPlaylistUnchanged(a, b) {\n  return a === b || a.segments && b.segments && a.segments.length === b.segments.length && a.endList === b.endList && a.mediaSequence === b.mediaSequence && a.preloadSegment === b.preloadSegment;\n};\n/**\n  * Returns a new master playlist that is the result of merging an\n  * updated media playlist into the original version. If the\n  * updated media playlist does not match any of the playlist\n  * entries in the original master playlist, null is returned.\n  *\n  * @param {Object} master a parsed master M3U8 object\n  * @param {Object} media a parsed media M3U8 object\n  * @return {Object} a new object that represents the original\n  * master playlist with the updated media playlist merged in, or\n  * null if the merge produced no change.\n  */\n\nvar updateMaster$1 = function updateMaster(master, newMedia, unchangedCheck) {\n  if (unchangedCheck === void 0) {\n    unchangedCheck = isPlaylistUnchanged;\n  }\n\n  var result = mergeOptions$2(master, {});\n  var oldMedia = result.playlists[newMedia.id];\n\n  if (!oldMedia) {\n    return null;\n  }\n\n  if (unchangedCheck(oldMedia, newMedia)) {\n    return null;\n  }\n\n  newMedia.segments = getAllSegments(newMedia);\n  var mergedPlaylist = mergeOptions$2(oldMedia, newMedia); // always use the new media's preload segment\n\n  if (mergedPlaylist.preloadSegment && !newMedia.preloadSegment) {\n    delete mergedPlaylist.preloadSegment;\n  } // if the update could overlap existing segment information, merge the two segment lists\n\n\n  if (oldMedia.segments) {\n    if (newMedia.skip) {\n      newMedia.segments = newMedia.segments || []; // add back in objects for skipped segments, so that we merge\n      // old properties into the new segments\n\n      for (var i = 0; i < newMedia.skip.skippedSegments; i++) {\n        newMedia.segments.unshift({\n          skipped: true\n        });\n      }\n    }\n\n    mergedPlaylist.segments = updateSegments(oldMedia.segments, newMedia.segments, newMedia.mediaSequence - oldMedia.mediaSequence);\n  } // resolve any segment URIs to prevent us from having to do it later\n\n\n  mergedPlaylist.segments.forEach(function (segment) {\n    resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n  }); // TODO Right now in the playlists array there are two references to each playlist, one\n  // that is referenced by index, and one by URI. The index reference may no longer be\n  // necessary.\n\n  for (var _i = 0; _i < result.playlists.length; _i++) {\n    if (result.playlists[_i].id === newMedia.id) {\n      result.playlists[_i] = mergedPlaylist;\n    }\n  }\n\n  result.playlists[newMedia.id] = mergedPlaylist; // URI reference added for backwards compatibility\n\n  result.playlists[newMedia.uri] = mergedPlaylist; // update media group playlist references.\n\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (!properties.playlists) {\n      return;\n    }\n\n    for (var _i2 = 0; _i2 < properties.playlists.length; _i2++) {\n      if (newMedia.id === properties.playlists[_i2].id) {\n        properties.playlists[_i2] = mergedPlaylist;\n      }\n    }\n  });\n  return result;\n};\n/**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n *        The current media\n * @param {boolean} update\n *        True if there were any updates from the last refresh, false otherwise\n * @return {number}\n *         The time in ms to wait before refreshing the live playlist\n */\n\nvar refreshDelay = function refreshDelay(media, update) {\n  var segments = media.segments || [];\n  var lastSegment = segments[segments.length - 1];\n  var lastPart = lastSegment && lastSegment.parts && lastSegment.parts[lastSegment.parts.length - 1];\n  var lastDuration = lastPart && lastPart.duration || lastSegment && lastSegment.duration;\n\n  if (update && lastDuration) {\n    return lastDuration * 1000;\n  } // if the playlist is unchanged since the last reload or last segment duration\n  // cannot be determined, try again after half the target duration\n\n\n  return (media.partTargetDuration || media.targetDuration || 10) * 500;\n};\n/**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends Stream\n * @param {string|Object} src url or object of manifest\n * @param {boolean} withCredentials the withCredentials xhr option\n * @class\n */\n\nvar PlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(PlaylistLoader, _EventTarget);\n\n  function PlaylistLoader(src, vhs, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or object is required');\n    }\n\n    _this.logger_ = logger('PlaylistLoader');\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.src = src;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n    var vhsOptions = vhs.options_;\n    _this.customTagParsers = vhsOptions && vhsOptions.customTagParsers || [];\n    _this.customTagMappers = vhsOptions && vhsOptions.customTagMappers || [];\n    _this.experimentalLLHLS = vhsOptions && vhsOptions.experimentalLLHLS || false; // force experimentalLLHLS for IE 11\n\n    if (videojs.browser.IE_VERSION) {\n      _this.experimentalLLHLS = false;\n    } // initialize the loader state\n\n\n    _this.state = 'HAVE_NOTHING'; // live playlist staleness timeout\n\n    _this.handleMediaupdatetimeout_ = _this.handleMediaupdatetimeout_.bind(_assertThisInitialized(_this));\n\n    _this.on('mediaupdatetimeout', _this.handleMediaupdatetimeout_);\n\n    return _this;\n  }\n\n  var _proto = PlaylistLoader.prototype;\n\n  _proto.handleMediaupdatetimeout_ = function handleMediaupdatetimeout_() {\n    var _this2 = this;\n\n    if (this.state !== 'HAVE_METADATA') {\n      // only refresh the media playlist if no other activity is going on\n      return;\n    }\n\n    var media = this.media();\n    var uri = resolveUrl(this.master.uri, media.uri);\n\n    if (this.experimentalLLHLS) {\n      uri = addLLHLSQueryDirectives(uri, media);\n    }\n\n    this.state = 'HAVE_CURRENT_METADATA';\n    this.request = this.vhs_.xhr({\n      uri: uri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this2.request) {\n        return;\n      }\n\n      if (error) {\n        return _this2.playlistRequestError(_this2.request, _this2.media(), 'HAVE_METADATA');\n      }\n\n      _this2.haveMetadata({\n        playlistString: _this2.request.responseText,\n        url: _this2.media().uri,\n        id: _this2.media().id\n      });\n    });\n  };\n\n  _proto.playlistRequestError = function playlistRequestError(xhr, playlist, startingState) {\n    var uri = playlist.uri,\n        id = playlist.id; // any in-flight request is now finished\n\n    this.request = null;\n\n    if (startingState) {\n      this.state = startingState;\n    }\n\n    this.error = {\n      playlist: this.master.playlists[id],\n      status: xhr.status,\n      message: \"HLS playlist request error at URL: \" + uri + \".\",\n      responseText: xhr.responseText,\n      code: xhr.status >= 500 ? 4 : 2\n    };\n    this.trigger('error');\n  };\n\n  _proto.parseManifest_ = function parseManifest_(_ref) {\n    var _this3 = this;\n\n    var url = _ref.url,\n        manifestString = _ref.manifestString;\n    return parseManifest({\n      onwarn: function onwarn(_ref2) {\n        var message = _ref2.message;\n        return _this3.logger_(\"m3u8-parser warn for \" + url + \": \" + message);\n      },\n      oninfo: function oninfo(_ref3) {\n        var message = _ref3.message;\n        return _this3.logger_(\"m3u8-parser info for \" + url + \": \" + message);\n      },\n      manifestString: manifestString,\n      customTagParsers: this.customTagParsers,\n      customTagMappers: this.customTagMappers,\n      experimentalLLHLS: this.experimentalLLHLS\n    });\n  }\n  /**\n   * Update the playlist loader's state in response to a new or updated playlist.\n   *\n   * @param {string} [playlistString]\n   *        Playlist string (if playlistObject is not provided)\n   * @param {Object} [playlistObject]\n   *        Playlist object (if playlistString is not provided)\n   * @param {string} url\n   *        URL of playlist\n   * @param {string} id\n   *        ID to use for playlist\n   */\n  ;\n\n  _proto.haveMetadata = function haveMetadata(_ref4) {\n    var playlistString = _ref4.playlistString,\n        playlistObject = _ref4.playlistObject,\n        url = _ref4.url,\n        id = _ref4.id;\n    // any in-flight request is now finished\n    this.request = null;\n    this.state = 'HAVE_METADATA';\n    var playlist = playlistObject || this.parseManifest_({\n      url: url,\n      manifestString: playlistString\n    });\n    playlist.lastRequest = Date.now();\n    setupMediaPlaylist({\n      playlist: playlist,\n      uri: url,\n      id: id\n    }); // merge this playlist into the master\n\n    var update = updateMaster$1(this.master, playlist);\n    this.targetDuration = playlist.partTargetDuration || playlist.targetDuration;\n    this.pendingMedia_ = null;\n\n    if (update) {\n      this.master = update;\n      this.media_ = this.master.playlists[id];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    this.updateMediaUpdateTimeout_(refreshDelay(this.media(), !!update));\n    this.trigger('loadedplaylist');\n  }\n  /**\n    * Abort any outstanding work and clean up.\n    */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    window$1.clearTimeout(this.finalRenditionTimeout);\n    this.off();\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  }\n  /**\n    * When called without any arguments, returns the currently\n    * active media playlist. When called with a single argument,\n    * triggers the playlist loader to asynchronously switch to the\n    * specified media playlist. Calling this method while the\n    * loader is in the HAVE_NOTHING causes an error to be emitted\n    * but otherwise has no effect.\n    *\n    * @param {Object=} playlist the parsed media playlist\n    * object to switch to\n    * @param {boolean=} shouldDelay whether we should delay the request by half target duration\n    *\n    * @return {Playlist} the current loaded media\n    */\n  ;\n\n  _proto.media = function media(playlist, shouldDelay) {\n    var _this4 = this;\n\n    // getter\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    } // find the playlist object if the target playlist has been\n    // specified by URI\n\n\n    if (typeof playlist === 'string') {\n      if (!this.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.master.playlists[playlist];\n    }\n\n    window$1.clearTimeout(this.finalRenditionTimeout);\n\n    if (shouldDelay) {\n      var delay = (playlist.partTargetDuration || playlist.targetDuration) / 2 * 1000 || 5 * 1000;\n      this.finalRenditionTimeout = window$1.setTimeout(this.media.bind(this, playlist, false), delay);\n      return;\n    }\n\n    var startingState = this.state;\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id;\n    var masterPlaylistRef = this.master.playlists[playlist.id]; // switch to fully loaded playlists immediately\n\n    if (masterPlaylistRef && masterPlaylistRef.endList || // handle the case of a playlist object (e.g., if using vhs-json with a resolved\n    // media playlist or, for the case of demuxed audio, a resolved audio media group)\n    playlist.endList && playlist.segments.length) {\n      // abort outstanding playlist requests\n      if (this.request) {\n        this.request.onreadystatechange = null;\n        this.request.abort();\n        this.request = null;\n      }\n\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n\n        if (startingState === 'HAVE_MASTER') {\n          // The initial playlist was a master manifest, and the first media selected was\n          // also provided (in the form of a resolved playlist object) as part of the\n          // source object (rather than just a URL). Therefore, since the media playlist\n          // doesn't need to be requested, loadedmetadata won't trigger as part of the\n          // normal flow, and needs an explicit trigger here.\n          this.trigger('loadedmetadata');\n        } else {\n          this.trigger('mediachange');\n        }\n      }\n\n      return;\n    } // We update/set the timeout here so that live playlists\n    // that are not a media change will \"start\" the loader as expected.\n    // We expect that this function will start the media update timeout\n    // cycle again. This also prevents a playlist switch failure from\n    // causing us to stall during live.\n\n\n    this.updateMediaUpdateTimeout_(refreshDelay(playlist, true)); // switching to the active playlist is a no-op\n\n    if (!mediaChange) {\n      return;\n    }\n\n    this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request\n\n    if (this.request) {\n      if (playlist.resolvedUri === this.request.url) {\n        // requesting to switch to the same playlist multiple times\n        // has no effect after the first\n        return;\n      }\n\n      this.request.onreadystatechange = null;\n      this.request.abort();\n      this.request = null;\n    } // request the new playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.pendingMedia_ = playlist;\n    this.request = this.vhs_.xhr({\n      uri: playlist.resolvedUri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this4.request) {\n        return;\n      }\n\n      playlist.lastRequest = Date.now();\n      playlist.resolvedUri = resolveManifestRedirect(_this4.handleManifestRedirects, playlist.resolvedUri, req);\n\n      if (error) {\n        return _this4.playlistRequestError(_this4.request, playlist, startingState);\n      }\n\n      _this4.haveMetadata({\n        playlistString: req.responseText,\n        url: playlist.uri,\n        id: playlist.id\n      }); // fire loadedmetadata the first time a media playlist is loaded\n\n\n      if (startingState === 'HAVE_MASTER') {\n        _this4.trigger('loadedmetadata');\n      } else {\n        _this4.trigger('mediachange');\n      }\n    });\n  }\n  /**\n   * pause loading of the playlist\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    this.stopRequest();\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    } // Need to restore state now that no activity is happening\n\n\n    if (this.state === 'SWITCHING_MEDIA') {\n      // if the loader was in the process of switching media, it should either return to\n      // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media\n      // playlist yet. This is determined by the existence of loader.media_\n      if (this.media_) {\n        this.state = 'HAVE_METADATA';\n      } else {\n        this.state = 'HAVE_MASTER';\n      }\n    } else if (this.state === 'HAVE_CURRENT_METADATA') {\n      this.state = 'HAVE_METADATA';\n    }\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.load = function load(shouldDelay) {\n    var _this5 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    var media = this.media();\n\n    if (shouldDelay) {\n      var delay = media ? (media.partTargetDuration || media.targetDuration) / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        _this5.mediaUpdateTimeout = null;\n\n        _this5.load();\n      }, delay);\n      return;\n    }\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.updateMediaUpdateTimeout_ = function updateMediaUpdateTimeout_(delay) {\n    var _this6 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    } // we only have use mediaupdatetimeout for live playlists.\n\n\n    if (!this.media() || this.media().endList) {\n      return;\n    }\n\n    this.mediaUpdateTimeout = window$1.setTimeout(function () {\n      _this6.mediaUpdateTimeout = null;\n\n      _this6.trigger('mediaupdatetimeout');\n\n      _this6.updateMediaUpdateTimeout_(delay);\n    }, delay);\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.start = function start() {\n    var _this7 = this;\n\n    this.started = true;\n\n    if (typeof this.src === 'object') {\n      // in the case of an entirely constructed manifest object (meaning there's no actual\n      // manifest on a server), default the uri to the page's href\n      if (!this.src.uri) {\n        this.src.uri = window$1.location.href;\n      } // resolvedUri is added on internally after the initial request. Since there's no\n      // request for pre-resolved manifests, add on resolvedUri here.\n\n\n      this.src.resolvedUri = this.src.uri; // Since a manifest object was passed in as the source (instead of a URL), the first\n      // request can be skipped (since the top level of the manifest, at a minimum, is\n      // already available as a parsed manifest object). However, if the manifest object\n      // represents a master playlist, some media playlists may need to be resolved before\n      // the starting segment list is available. Therefore, go directly to setup of the\n      // initial playlist, and let the normal flow continue from there.\n      //\n      // Note that the call to setup is asynchronous, as other sections of VHS may assume\n      // that the first request is asynchronous.\n\n      setTimeout(function () {\n        _this7.setupInitialPlaylist(_this7.src);\n      }, 0);\n      return;\n    } // request the specified URL\n\n\n    this.request = this.vhs_.xhr({\n      uri: this.src,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      } // clear the loader's request reference\n\n\n      _this7.request = null;\n\n      if (error) {\n        _this7.error = {\n          status: req.status,\n          message: \"HLS playlist request error at URL: \" + _this7.src + \".\",\n          responseText: req.responseText,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        };\n\n        if (_this7.state === 'HAVE_NOTHING') {\n          _this7.started = false;\n        }\n\n        return _this7.trigger('error');\n      }\n\n      _this7.src = resolveManifestRedirect(_this7.handleManifestRedirects, _this7.src, req);\n\n      var manifest = _this7.parseManifest_({\n        manifestString: req.responseText,\n        url: _this7.src\n      });\n\n      _this7.setupInitialPlaylist(manifest);\n    });\n  };\n\n  _proto.srcUri = function srcUri() {\n    return typeof this.src === 'string' ? this.src : this.src.uri;\n  }\n  /**\n   * Given a manifest object that's either a master or media playlist, trigger the proper\n   * events and set the state of the playlist loader.\n   *\n   * If the manifest object represents a master playlist, `loadedplaylist` will be\n   * triggered to allow listeners to select a playlist. If none is selected, the loader\n   * will default to the first one in the playlists array.\n   *\n   * If the manifest object represents a media playlist, `loadedplaylist` will be\n   * triggered followed by `loadedmetadata`, as the only available playlist is loaded.\n   *\n   * In the case of a media playlist, a master playlist object wrapper with one playlist\n   * will be created so that all logic can handle playlists in the same fashion (as an\n   * assumed manifest object schema).\n   *\n   * @param {Object} manifest\n   *        The parsed manifest object\n   */\n  ;\n\n  _proto.setupInitialPlaylist = function setupInitialPlaylist(manifest) {\n    this.state = 'HAVE_MASTER';\n\n    if (manifest.playlists) {\n      this.master = manifest;\n      addPropertiesToMaster(this.master, this.srcUri()); // If the initial master playlist has playlists wtih segments already resolved,\n      // then resolve URIs in advance, as they are usually done after a playlist request,\n      // which may not happen if the playlist is resolved.\n\n      manifest.playlists.forEach(function (playlist) {\n        playlist.segments = getAllSegments(playlist);\n        playlist.segments.forEach(function (segment) {\n          resolveSegmentUris(segment, playlist.resolvedUri);\n        });\n      });\n      this.trigger('loadedplaylist');\n\n      if (!this.request) {\n        // no media playlist was specifically selected so start\n        // from the first listed one\n        this.media(this.master.playlists[0]);\n      }\n\n      return;\n    } // In order to support media playlists passed in as vhs-json, the case where the uri\n    // is not provided as part of the manifest should be considered, and an appropriate\n    // default used.\n\n\n    var uri = this.srcUri() || window$1.location.href;\n    this.master = masterForMedia(manifest, uri);\n    this.haveMetadata({\n      playlistObject: manifest,\n      url: uri,\n      id: this.master.playlists[0].id\n    });\n    this.trigger('loadedmetadata');\n  };\n\n  return PlaylistLoader;\n}(EventTarget$1);\n\n/**\n * @file xhr.js\n */\nvar videojsXHR = videojs.xhr,\n    mergeOptions$1 = videojs.mergeOptions;\n\nvar callbackWrapper = function callbackWrapper(request, error, response, callback) {\n  var reqResponse = request.responseType === 'arraybuffer' ? request.response : request.responseText;\n\n  if (!error && reqResponse) {\n    request.responseTime = Date.now();\n    request.roundTripTime = request.responseTime - request.requestTime;\n    request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n\n    if (!request.bandwidth) {\n      request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n    }\n  }\n\n  if (response.headers) {\n    request.responseHeaders = response.headers;\n  } // videojs.xhr now uses a specific code on the error\n  // object to signal that a request has timed out instead\n  // of setting a boolean on the request object\n\n\n  if (error && error.code === 'ETIMEDOUT') {\n    request.timedout = true;\n  } // videojs.xhr no longer considers status codes outside of 200 and 0\n  // (for file uris) to be errors, but the old XHR did, so emulate that\n  // behavior. Status 206 may be used in response to byterange requests.\n\n\n  if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n    error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n  }\n\n  callback(error, request);\n};\n\nvar xhrFactory = function xhrFactory() {\n  var xhr = function XhrFunction(options, callback) {\n    // Add a default timeout\n    options = mergeOptions$1({\n      timeout: 45e3\n    }, options); // Allow an optional user-specified function to modify the option\n    // object before we construct the xhr request\n\n    var beforeRequest = XhrFunction.beforeRequest || videojs.Vhs.xhr.beforeRequest;\n\n    if (beforeRequest && typeof beforeRequest === 'function') {\n      var newOptions = beforeRequest(options);\n\n      if (newOptions) {\n        options = newOptions;\n      }\n    } // Use the standard videojs.xhr() method unless `videojs.Vhs.xhr` has been overriden\n    // TODO: switch back to videojs.Vhs.xhr.name === 'XhrFunction' when we drop IE11\n\n\n    var xhrMethod = videojs.Vhs.xhr.original === true ? videojsXHR : videojs.Vhs.xhr;\n    var request = xhrMethod(options, function (error, response) {\n      return callbackWrapper(request, error, response, callback);\n    });\n    var originalAbort = request.abort;\n\n    request.abort = function () {\n      request.aborted = true;\n      return originalAbort.apply(request, arguments);\n    };\n\n    request.uri = options.uri;\n    request.requestTime = Date.now();\n    return request;\n  };\n\n  xhr.original = true;\n  return xhr;\n};\n/**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n *                             of a byte-range\n */\n\n\nvar byterangeStr = function byterangeStr(byterange) {\n  // `byterangeEnd` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var byterangeEnd;\n  var byterangeStart = byterange.offset;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    byterangeEnd = window$1.BigInt(byterange.offset) + window$1.BigInt(byterange.length) - window$1.BigInt(1);\n  } else {\n    byterangeEnd = byterange.offset + byterange.length - 1;\n  }\n\n  return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n};\n/**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n */\n\nvar segmentXhrHeaders = function segmentXhrHeaders(segment) {\n  var headers = {};\n\n  if (segment.byterange) {\n    headers.Range = byterangeStr(segment.byterange);\n  }\n\n  return headers;\n};\n\n/**\n * @file bin-utils.js\n */\n\n/**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {number} i the iterator on the range to convert\n * @return {string} the range in string format\n */\n\nvar textRange = function textRange(range, i) {\n  return range.start(i) + '-' + range.end(i);\n};\n/**\n * format a number as hex string\n *\n * @param {number} e The number\n * @param {number} i the iterator\n * @return {string} the hex formatted number as a string\n */\n\n\nvar formatHexString = function formatHexString(e, i) {\n  var value = e.toString(16);\n  return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n};\n\nvar formatAsciiString = function formatAsciiString(e) {\n  if (e >= 0x20 && e < 0x7e) {\n    return String.fromCharCode(e);\n  }\n\n  return '.';\n};\n/**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n *        Object of properties and values to send to the web worker\n * @return {Object}\n *         Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n\nvar createTransferableMessage = function createTransferableMessage(message) {\n  var transferable = {};\n  Object.keys(message).forEach(function (key) {\n    var value = message[key];\n\n    if (isArrayBufferView(value)) {\n      transferable[key] = {\n        bytes: value.buffer,\n        byteOffset: value.byteOffset,\n        byteLength: value.byteLength\n      };\n    } else {\n      transferable[key] = value;\n    }\n  });\n  return transferable;\n};\n/**\n * Returns a unique string identifier for a media initialization\n * segment.\n *\n * @param {Object} initSegment\n *        the init segment object.\n *\n * @return {string} the generated init segment id\n */\n\nvar initSegmentId = function initSegmentId(initSegment) {\n  var byterange = initSegment.byterange || {\n    length: Infinity,\n    offset: 0\n  };\n  return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n};\n/**\n * Returns a unique string identifier for a media segment key.\n *\n * @param {Object} key the encryption key\n * @return {string} the unique id for the media segment key.\n */\n\nvar segmentKeyId = function segmentKeyId(key) {\n  return key.resolvedUri;\n};\n/**\n * utils to help dump binary data to the console\n *\n * @param {Array|TypedArray} data\n *        data to dump to a string\n *\n * @return {string} the data as a hex string.\n */\n\nvar hexDump = function hexDump(data) {\n  var bytes = Array.prototype.slice.call(data);\n  var step = 16;\n  var result = '';\n  var hex;\n  var ascii;\n\n  for (var j = 0; j < bytes.length / step; j++) {\n    hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n    ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n    result += hex + ' ' + ascii + '\\n';\n  }\n\n  return result;\n};\nvar tagDump = function tagDump(_ref) {\n  var bytes = _ref.bytes;\n  return hexDump(bytes);\n};\nvar textRanges = function textRanges(ranges) {\n  var result = '';\n  var i;\n\n  for (i = 0; i < ranges.length; i++) {\n    result += textRange(ranges, i) + ' ';\n  }\n\n  return result;\n};\n\nvar utils = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  createTransferableMessage: createTransferableMessage,\n  initSegmentId: initSegmentId,\n  segmentKeyId: segmentKeyId,\n  hexDump: hexDump,\n  tagDump: tagDump,\n  textRanges: textRanges\n});\n\n// TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux\n// 25% was arbitrarily chosen, and may need to be refined over time.\n\nvar SEGMENT_END_FUDGE_PERCENT = 0.25;\n/**\n * Converts a player time (any time that can be gotten/set from player.currentTime(),\n * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a\n * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).\n *\n * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an \"anchor\n * point\" (a point where we have a mapping from program time to player time, with player\n * time being the post transmux start of the segment).\n *\n * For more details, see [this doc](../../docs/program-time-from-player-time.md).\n *\n * @param {number} playerTime the player time\n * @param {Object} segment the segment which contains the player time\n * @return {Date} program time\n */\n\nvar playerTimeToProgramTime = function playerTimeToProgramTime(playerTime, segment) {\n  if (!segment.dateTimeObject) {\n    // Can't convert without an \"anchor point\" for the program time (i.e., a time that can\n    // be used to map the start of a segment with a real world time).\n    return null;\n  }\n\n  var transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;\n  var transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended\n\n  var startOfSegment = transmuxedStart + transmuxerPrependedSeconds;\n  var offsetFromSegmentStart = playerTime - startOfSegment;\n  return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);\n};\nvar originalSegmentVideoDuration = function originalSegmentVideoDuration(videoTimingInfo) {\n  return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;\n};\n/**\n * Finds a segment that contains the time requested given as an ISO-8601 string. The\n * returned segment might be an estimate or an accurate match.\n *\n * @param {string} programTime The ISO-8601 programTime to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\nvar findSegmentForProgramTime = function findSegmentForProgramTime(programTime, playlist) {\n  // Assumptions:\n  //  - verifyProgramDateTimeTags has already been run\n  //  - live streams have been started\n  var dateTimeObject;\n\n  try {\n    dateTimeObject = new Date(programTime);\n  } catch (e) {\n    return null;\n  }\n\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segment = playlist.segments[0];\n\n  if (dateTimeObject < segment.dateTimeObject) {\n    // Requested time is before stream start.\n    return null;\n  }\n\n  for (var i = 0; i < playlist.segments.length - 1; i++) {\n    segment = playlist.segments[i];\n    var nextSegmentStart = playlist.segments[i + 1].dateTimeObject;\n\n    if (dateTimeObject < nextSegmentStart) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n  var lastSegmentStart = lastSegment.dateTimeObject;\n  var lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;\n  var lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);\n\n  if (dateTimeObject > lastSegmentEnd) {\n    // Beyond the end of the stream, or our best guess of the end of the stream.\n    return null;\n  }\n\n  if (dateTimeObject > lastSegmentStart) {\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),\n    // Although, given that all segments have accurate date time objects, the segment\n    // selected should be accurate, unless the video has been transmuxed at some point\n    // (determined by the presence of the videoTimingInfo object), the segment's \"player\n    // time\" (the start time in the player) can't be considered accurate.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Finds a segment that contains the given player time(in seconds).\n *\n * @param {number} time The player time to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\nvar findSegmentForPlayerTime = function findSegmentForPlayerTime(time, playlist) {\n  // Assumptions:\n  // - there will always be a segment.duration\n  // - we can start from zero\n  // - segments are in time order\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segmentEnd = 0;\n  var segment;\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and\n    // should contain the most accurate values we have for the segment's player times.\n    //\n    // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall\n    // back to an estimate based on the manifest derived (inaccurate) segment.duration, to\n    // calculate an end value.\n\n    segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;\n\n    if (time <= segmentEnd) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n\n  if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {\n    // The time requested is beyond the stream end.\n    return null;\n  }\n\n  if (time > segmentEnd) {\n    // The time is within or beyond the last segment.\n    //\n    // Check to see if the time is beyond a reasonable guess of the end of the stream.\n    if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {\n      // Technically, because the duration value is only an estimate, the time may still\n      // exist in the last segment, however, there isn't enough information to make even\n      // a reasonable estimate.\n      return null;\n    }\n\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,\n    // Because videoTimingInfo is only set after transmux, it is the only way to get\n    // accurate timing values.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.\n * If the offset returned is positive, the programTime occurs after the\n * comparisonTimestamp.\n * If the offset is negative, the programTime occurs before the comparisonTimestamp.\n *\n * @param {string} comparisonTimeStamp An ISO-8601 timestamp to compare against\n * @param {string} programTime The programTime as an ISO-8601 string\n * @return {number} offset\n */\n\nvar getOffsetFromTimestamp = function getOffsetFromTimestamp(comparisonTimeStamp, programTime) {\n  var segmentDateTime;\n  var programDateTime;\n\n  try {\n    segmentDateTime = new Date(comparisonTimeStamp);\n    programDateTime = new Date(programTime);\n  } catch (e) {// TODO handle error\n  }\n\n  var segmentTimeEpoch = segmentDateTime.getTime();\n  var programTimeEpoch = programDateTime.getTime();\n  return (programTimeEpoch - segmentTimeEpoch) / 1000;\n};\n/**\n * Checks that all segments in this playlist have programDateTime tags.\n *\n * @param {Object} playlist A playlist object\n */\n\nvar verifyProgramDateTimeTags = function verifyProgramDateTimeTags(playlist) {\n  if (!playlist.segments || playlist.segments.length === 0) {\n    return false;\n  }\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    var segment = playlist.segments[i];\n\n    if (!segment.dateTimeObject) {\n      return false;\n    }\n  }\n\n  return true;\n};\n/**\n * Returns the programTime of the media given a playlist and a playerTime.\n * The playlist must have programDateTime tags for a programDateTime tag to be returned.\n * If the segments containing the time requested have not been buffered yet, an estimate\n * may be returned to the callback.\n *\n * @param {Object} args\n * @param {Object} args.playlist A playlist object to search within\n * @param {number} time A playerTime in seconds\n * @param {Function} callback(err, programTime)\n * @return {string} err.message A detailed error message\n * @return {Object} programTime\n * @return {number} programTime.mediaSeconds The streamTime in seconds\n * @return {string} programTime.programDateTime The programTime as an ISO-8601 String\n */\n\nvar getProgramTime = function getProgramTime(_ref) {\n  var playlist = _ref.playlist,\n      _ref$time = _ref.time,\n      time = _ref$time === void 0 ? undefined : _ref$time,\n      callback = _ref.callback;\n\n  if (!callback) {\n    throw new Error('getProgramTime: callback must be provided');\n  }\n\n  if (!playlist || time === undefined) {\n    return callback({\n      message: 'getProgramTime: playlist and time must be provided'\n    });\n  }\n\n  var matchedSegment = findSegmentForPlayerTime(time, playlist);\n\n  if (!matchedSegment) {\n    return callback({\n      message: 'valid programTime was not found'\n    });\n  }\n\n  if (matchedSegment.type === 'estimate') {\n    return callback({\n      message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',\n      seekTime: matchedSegment.estimatedStart\n    });\n  }\n\n  var programTimeObject = {\n    mediaSeconds: time\n  };\n  var programTime = playerTimeToProgramTime(time, matchedSegment.segment);\n\n  if (programTime) {\n    programTimeObject.programDateTime = programTime.toISOString();\n  }\n\n  return callback(null, programTimeObject);\n};\n/**\n * Seeks in the player to a time that matches the given programTime ISO-8601 string.\n *\n * @param {Object} args\n * @param {string} args.programTime A programTime to seek to as an ISO-8601 String\n * @param {Object} args.playlist A playlist to look within\n * @param {number} args.retryCount The number of times to try for an accurate seek. Default is 2.\n * @param {Function} args.seekTo A method to perform a seek\n * @param {boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.\n * @param {Object} args.tech The tech to seek on\n * @param {Function} args.callback(err, newTime) A callback to return the new time to\n * @return {string} err.message A detailed error message\n * @return {number} newTime The exact time that was seeked to in seconds\n */\n\nvar seekToProgramTime = function seekToProgramTime(_ref2) {\n  var programTime = _ref2.programTime,\n      playlist = _ref2.playlist,\n      _ref2$retryCount = _ref2.retryCount,\n      retryCount = _ref2$retryCount === void 0 ? 2 : _ref2$retryCount,\n      seekTo = _ref2.seekTo,\n      _ref2$pauseAfterSeek = _ref2.pauseAfterSeek,\n      pauseAfterSeek = _ref2$pauseAfterSeek === void 0 ? true : _ref2$pauseAfterSeek,\n      tech = _ref2.tech,\n      callback = _ref2.callback;\n\n  if (!callback) {\n    throw new Error('seekToProgramTime: callback must be provided');\n  }\n\n  if (typeof programTime === 'undefined' || !playlist || !seekTo) {\n    return callback({\n      message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'\n    });\n  }\n\n  if (!playlist.endList && !tech.hasStarted_) {\n    return callback({\n      message: 'player must be playing a live stream to start buffering'\n    });\n  }\n\n  if (!verifyProgramDateTimeTags(playlist)) {\n    return callback({\n      message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri\n    });\n  }\n\n  var matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match\n\n  if (!matchedSegment) {\n    return callback({\n      message: programTime + \" was not found in the stream\"\n    });\n  }\n\n  var segment = matchedSegment.segment;\n  var mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);\n\n  if (matchedSegment.type === 'estimate') {\n    // we've run out of retries\n    if (retryCount === 0) {\n      return callback({\n        message: programTime + \" is not buffered yet. Try again\"\n      });\n    }\n\n    seekTo(matchedSegment.estimatedStart + mediaOffset);\n    tech.one('seeked', function () {\n      seekToProgramTime({\n        programTime: programTime,\n        playlist: playlist,\n        retryCount: retryCount - 1,\n        seekTo: seekTo,\n        pauseAfterSeek: pauseAfterSeek,\n        tech: tech,\n        callback: callback\n      });\n    });\n    return;\n  } // Since the segment.start value is determined from the buffered end or ending time\n  // of the prior segment, the seekToTime doesn't need to account for any transmuxer\n  // modifications.\n\n\n  var seekToTime = segment.start + mediaOffset;\n\n  var seekedCallback = function seekedCallback() {\n    return callback(null, tech.currentTime());\n  }; // listen for seeked event\n\n\n  tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state\n\n  if (pauseAfterSeek) {\n    tech.pause();\n  }\n\n  seekTo(seekToTime);\n};\n\n// which will only happen if the request is complete.\n\nvar callbackOnCompleted = function callbackOnCompleted(request, cb) {\n  if (request.readyState === 4) {\n    return cb();\n  }\n\n  return;\n};\n\nvar containerRequest = function containerRequest(uri, xhr, cb) {\n  var bytes = [];\n  var id3Offset;\n  var finished = false;\n\n  var endRequestAndCallback = function endRequestAndCallback(err, req, type, _bytes) {\n    req.abort();\n    finished = true;\n    return cb(err, req, type, _bytes);\n  };\n\n  var progressListener = function progressListener(error, request) {\n    if (finished) {\n      return;\n    }\n\n    if (error) {\n      return endRequestAndCallback(error, request, '', bytes);\n    } // grap the new part of content that was just downloaded\n\n\n    var newPart = request.responseText.substring(bytes && bytes.byteLength || 0, request.responseText.length); // add that onto bytes\n\n    bytes = concatTypedArrays(bytes, stringToBytes(newPart, true));\n    id3Offset = id3Offset || getId3Offset(bytes); // we need at least 10 bytes to determine a type\n    // or we need at least two bytes after an id3Offset\n\n    if (bytes.length < 10 || id3Offset && bytes.length < id3Offset + 2) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    var type = detectContainerForBytes(bytes); // if this looks like a ts segment but we don't have enough data\n    // to see the second sync byte, wait until we have enough data\n    // before declaring it ts\n\n    if (type === 'ts' && bytes.length < 188) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    } // this may be an unsynced ts segment\n    // wait for 376 bytes before detecting no container\n\n\n    if (!type && bytes.length < 376) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    return endRequestAndCallback(null, request, type, bytes);\n  };\n\n  var options = {\n    uri: uri,\n    beforeSend: function beforeSend(request) {\n      // this forces the browser to pass the bytes to us unprocessed\n      request.overrideMimeType('text/plain; charset=x-user-defined');\n      request.addEventListener('progress', function (_ref) {\n        _ref.total;\n            _ref.loaded;\n        return callbackWrapper(request, null, {\n          statusCode: request.status\n        }, progressListener);\n      });\n    }\n  };\n  var request = xhr(options, function (error, response) {\n    return callbackWrapper(request, error, response, progressListener);\n  });\n  return request;\n};\n\nvar EventTarget = videojs.EventTarget,\n    mergeOptions = videojs.mergeOptions;\n\nvar dashPlaylistUnchanged = function dashPlaylistUnchanged(a, b) {\n  if (!isPlaylistUnchanged(a, b)) {\n    return false;\n  } // for dash the above check will often return true in scenarios where\n  // the playlist actually has changed because mediaSequence isn't a\n  // dash thing, and we often set it to 1. So if the playlists have the same amount\n  // of segments we return true.\n  // So for dash we need to make sure that the underlying segments are different.\n  // if sidx changed then the playlists are different.\n\n\n  if (a.sidx && b.sidx && (a.sidx.offset !== b.sidx.offset || a.sidx.length !== b.sidx.length)) {\n    return false;\n  } else if (!a.sidx && b.sidx || a.sidx && !b.sidx) {\n    return false;\n  } // one or the other does not have segments\n  // there was a change.\n\n\n  if (a.segments && !b.segments || !a.segments && b.segments) {\n    return false;\n  } // neither has segments nothing changed\n\n\n  if (!a.segments && !b.segments) {\n    return true;\n  } // check segments themselves\n\n\n  for (var i = 0; i < a.segments.length; i++) {\n    var aSegment = a.segments[i];\n    var bSegment = b.segments[i]; // if uris are different between segments there was a change\n\n    if (aSegment.uri !== bSegment.uri) {\n      return false;\n    } // neither segment has a byterange, there will be no byterange change.\n\n\n    if (!aSegment.byterange && !bSegment.byterange) {\n      continue;\n    }\n\n    var aByterange = aSegment.byterange;\n    var bByterange = bSegment.byterange; // if byterange only exists on one of the segments, there was a change.\n\n    if (aByterange && !bByterange || !aByterange && bByterange) {\n      return false;\n    } // if both segments have byterange with different offsets, there was a change.\n\n\n    if (aByterange.offset !== bByterange.offset || aByterange.length !== bByterange.length) {\n      return false;\n    }\n  } // if everything was the same with segments, this is the same playlist.\n\n\n  return true;\n};\n/**\n * Use the representation IDs from the mpd object to create groupIDs, the NAME is set to mandatory representation\n * ID in the parser. This allows for continuous playout across periods with the same representation IDs\n * (continuous periods as defined in DASH-IF 3.2.12). This is assumed in the mpd-parser as well. If we want to support\n * periods without continuous playback this function may need modification as well as the parser.\n */\n\n\nvar dashGroupId = function dashGroupId(type, group, label, playlist) {\n  // If the manifest somehow does not have an ID (non-dash compliant), use the label.\n  var playlistId = playlist.attributes.NAME || label;\n  return \"placeholder-uri-\" + type + \"-\" + group + \"-\" + playlistId;\n};\n/**\n * Parses the master XML string and updates playlist URI references.\n *\n * @param {Object} config\n *        Object of arguments\n * @param {string} config.masterXml\n *        The mpd XML\n * @param {string} config.srcUrl\n *        The mpd URL\n * @param {Date} config.clientOffset\n *         A time difference between server and client\n * @param {Object} config.sidxMapping\n *        SIDX mappings for moof/mdat URIs and byte ranges\n * @return {Object}\n *         The parsed mpd manifest object\n */\n\n\nvar parseMasterXml = function parseMasterXml(_ref) {\n  var masterXml = _ref.masterXml,\n      srcUrl = _ref.srcUrl,\n      clientOffset = _ref.clientOffset,\n      sidxMapping = _ref.sidxMapping,\n      previousManifest = _ref.previousManifest;\n  var manifest = parse(masterXml, {\n    manifestUri: srcUrl,\n    clientOffset: clientOffset,\n    sidxMapping: sidxMapping,\n    previousManifest: previousManifest\n  });\n  addPropertiesToMaster(manifest, srcUrl, dashGroupId);\n  return manifest;\n};\n/**\n * Removes any mediaGroup labels that no longer exist in the newMaster\n *\n * @param {Object} update\n *         The previous mpd object being updated\n * @param {Object} newMaster\n *         The new mpd object\n */\n\nvar removeOldMediaGroupLabels = function removeOldMediaGroupLabels(update, newMaster) {\n  forEachMediaGroup(update, function (properties, type, group, label) {\n    if (!(label in newMaster.mediaGroups[type][group])) {\n      delete update.mediaGroups[type][group][label];\n    }\n  });\n};\n/**\n * Returns a new master manifest that is the result of merging an updated master manifest\n * into the original version.\n *\n * @param {Object} oldMaster\n *        The old parsed mpd object\n * @param {Object} newMaster\n *        The updated parsed mpd object\n * @return {Object}\n *         A new object representing the original master manifest with the updated media\n *         playlists merged in\n */\n\n\nvar updateMaster = function updateMaster(oldMaster, newMaster, sidxMapping) {\n  var noChanges = true;\n  var update = mergeOptions(oldMaster, {\n    // These are top level properties that can be updated\n    duration: newMaster.duration,\n    minimumUpdatePeriod: newMaster.minimumUpdatePeriod,\n    timelineStarts: newMaster.timelineStarts\n  }); // First update the playlists in playlist list\n\n  for (var i = 0; i < newMaster.playlists.length; i++) {\n    var playlist = newMaster.playlists[i];\n\n    if (playlist.sidx) {\n      var sidxKey = generateSidxKey(playlist.sidx); // add sidx segments to the playlist if we have all the sidx info already\n\n      if (sidxMapping && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx) {\n        addSidxSegmentsToPlaylist(playlist, sidxMapping[sidxKey].sidx, playlist.sidx.resolvedUri);\n      }\n    }\n\n    var playlistUpdate = updateMaster$1(update, playlist, dashPlaylistUnchanged);\n\n    if (playlistUpdate) {\n      update = playlistUpdate;\n      noChanges = false;\n    }\n  } // Then update media group playlists\n\n\n  forEachMediaGroup(newMaster, function (properties, type, group, label) {\n    if (properties.playlists && properties.playlists.length) {\n      var id = properties.playlists[0].id;\n\n      var _playlistUpdate = updateMaster$1(update, properties.playlists[0], dashPlaylistUnchanged);\n\n      if (_playlistUpdate) {\n        update = _playlistUpdate; // add new mediaGroup label if it doesn't exist and assign the new mediaGroup.\n\n        if (!(label in update.mediaGroups[type][group])) {\n          update.mediaGroups[type][group][label] = properties;\n        } // update the playlist reference within media groups\n\n\n        update.mediaGroups[type][group][label].playlists[0] = update.playlists[id];\n        noChanges = false;\n      }\n    }\n  }); // remove mediaGroup labels and references that no longer exist in the newMaster\n\n  removeOldMediaGroupLabels(update, newMaster);\n\n  if (newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n    noChanges = false;\n  }\n\n  if (noChanges) {\n    return null;\n  }\n\n  return update;\n}; // SIDX should be equivalent if the URI and byteranges of the SIDX match.\n// If the SIDXs have maps, the two maps should match,\n// both `a` and `b` missing SIDXs is considered matching.\n// If `a` or `b` but not both have a map, they aren't matching.\n\nvar equivalentSidx = function equivalentSidx(a, b) {\n  var neitherMap = Boolean(!a.map && !b.map);\n  var equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);\n  return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;\n}; // exported for testing\n\n\nvar compareSidxEntry = function compareSidxEntry(playlists, oldSidxMapping) {\n  var newSidxMapping = {};\n\n  for (var id in playlists) {\n    var playlist = playlists[id];\n    var currentSidxInfo = playlist.sidx;\n\n    if (currentSidxInfo) {\n      var key = generateSidxKey(currentSidxInfo);\n\n      if (!oldSidxMapping[key]) {\n        break;\n      }\n\n      var savedSidxInfo = oldSidxMapping[key].sidxInfo;\n\n      if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {\n        newSidxMapping[key] = oldSidxMapping[key];\n      }\n    }\n  }\n\n  return newSidxMapping;\n};\n/**\n *  A function that filters out changed items as they need to be requested separately.\n *\n *  The method is exported for testing\n *\n *  @param {Object} master the parsed mpd XML returned via mpd-parser\n *  @param {Object} oldSidxMapping the SIDX to compare against\n */\n\nvar filterChangedSidxMappings = function filterChangedSidxMappings(master, oldSidxMapping) {\n  var videoSidx = compareSidxEntry(master.playlists, oldSidxMapping);\n  var mediaGroupSidx = videoSidx;\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (properties.playlists && properties.playlists.length) {\n      var playlists = properties.playlists;\n      mediaGroupSidx = mergeOptions(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));\n    }\n  });\n  return mediaGroupSidx;\n};\n\nvar DashPlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(DashPlaylistLoader, _EventTarget);\n\n  // DashPlaylistLoader must accept either a src url or a playlist because subsequent\n  // playlist loader setups from media groups will expect to be able to pass a playlist\n  // (since there aren't external URLs to media playlists with DASH)\n  function DashPlaylistLoader(srcUrlOrPlaylist, vhs, options, masterPlaylistLoader) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.masterPlaylistLoader_ = masterPlaylistLoader || _assertThisInitialized(_this);\n\n    if (!masterPlaylistLoader) {\n      _this.isMaster_ = true;\n    }\n\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n\n    if (!srcUrlOrPlaylist) {\n      throw new Error('A non-empty playlist URL or object is required');\n    } // event naming?\n\n\n    _this.on('minimumUpdatePeriod', function () {\n      _this.refreshXml_();\n    }); // live playlist staleness timeout\n\n\n    _this.on('mediaupdatetimeout', function () {\n      _this.refreshMedia_(_this.media().id);\n    });\n\n    _this.state = 'HAVE_NOTHING';\n    _this.loadedPlaylists_ = {};\n    _this.logger_ = logger('DashPlaylistLoader'); // initialize the loader state\n    // The masterPlaylistLoader will be created with a string\n\n    if (_this.isMaster_) {\n      _this.masterPlaylistLoader_.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes\n      // once multi-period is refactored\n\n      _this.masterPlaylistLoader_.sidxMapping_ = {};\n    } else {\n      _this.childPlaylist_ = srcUrlOrPlaylist;\n    }\n\n    return _this;\n  }\n\n  var _proto = DashPlaylistLoader.prototype;\n\n  _proto.requestErrored_ = function requestErrored_(err, request, startingState) {\n    // disposed\n    if (!this.request) {\n      return true;\n    } // pending request is cleared\n\n\n    this.request = null;\n\n    if (err) {\n      // use the provided error object or create one\n      // based on the request/response\n      this.error = typeof err === 'object' && !(err instanceof Error) ? err : {\n        status: request.status,\n        message: 'DASH request error at URL: ' + request.uri,\n        response: request.response,\n        // MEDIA_ERR_NETWORK\n        code: 2\n      };\n\n      if (startingState) {\n        this.state = startingState;\n      }\n\n      this.trigger('error');\n      return true;\n    }\n  }\n  /**\n   * Verify that the container of the sidx segment can be parsed\n   * and if it can, get and parse that segment.\n   */\n  ;\n\n  _proto.addSidxSegments_ = function addSidxSegments_(playlist, startingState, cb) {\n    var _this2 = this;\n\n    var sidxKey = playlist.sidx && generateSidxKey(playlist.sidx); // playlist lacks sidx or sidx segments were added to this playlist already.\n\n    if (!playlist.sidx || !sidxKey || this.masterPlaylistLoader_.sidxMapping_[sidxKey]) {\n      // keep this function async\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return cb(false);\n      }, 0);\n      return;\n    } // resolve the segment URL relative to the playlist\n\n\n    var uri = resolveManifestRedirect(this.handleManifestRedirects, playlist.sidx.resolvedUri);\n\n    var fin = function fin(err, request) {\n      if (_this2.requestErrored_(err, request, startingState)) {\n        return;\n      }\n\n      var sidxMapping = _this2.masterPlaylistLoader_.sidxMapping_;\n      var sidx;\n\n      try {\n        sidx = parseSidx(toUint8(request.response).subarray(8));\n      } catch (e) {\n        // sidx parsing failed.\n        _this2.requestErrored_(e, request, startingState);\n\n        return;\n      }\n\n      sidxMapping[sidxKey] = {\n        sidxInfo: playlist.sidx,\n        sidx: sidx\n      };\n      addSidxSegmentsToPlaylist(playlist, sidx, playlist.sidx.resolvedUri);\n      return cb(true);\n    };\n\n    this.request = containerRequest(uri, this.vhs_.xhr, function (err, request, container, bytes) {\n      if (err) {\n        return fin(err, request);\n      }\n\n      if (!container || container !== 'mp4') {\n        return fin({\n          status: request.status,\n          message: \"Unsupported \" + (container || 'unknown') + \" container type for sidx segment at URL: \" + uri,\n          // response is just bytes in this case\n          // but we really don't want to return that.\n          response: '',\n          playlist: playlist,\n          internal: true,\n          blacklistDuration: Infinity,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        }, request);\n      } // if we already downloaded the sidx bytes in the container request, use them\n\n\n      var _playlist$sidx$bytera = playlist.sidx.byterange,\n          offset = _playlist$sidx$bytera.offset,\n          length = _playlist$sidx$bytera.length;\n\n      if (bytes.length >= length + offset) {\n        return fin(err, {\n          response: bytes.subarray(offset, offset + length),\n          status: request.status,\n          uri: request.uri\n        });\n      } // otherwise request sidx bytes\n\n\n      _this2.request = _this2.vhs_.xhr({\n        uri: uri,\n        responseType: 'arraybuffer',\n        headers: segmentXhrHeaders({\n          byterange: playlist.sidx.byterange\n        })\n      }, fin);\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    this.loadedPlaylists_ = {};\n    window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n    window$1.clearTimeout(this.mediaRequest_);\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    this.mediaRequest_ = null;\n    this.minimumUpdatePeriodTimeout_ = null;\n\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.off();\n  };\n\n  _proto.hasPendingRequest = function hasPendingRequest() {\n    return this.request || this.mediaRequest_;\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  };\n\n  _proto.media = function media(playlist) {\n    var _this3 = this;\n\n    // getter\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    }\n\n    var startingState = this.state; // find the playlist object if the target playlist has been specified by URI\n\n    if (typeof playlist === 'string') {\n      if (!this.masterPlaylistLoader_.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.masterPlaylistLoader_.master.playlists[playlist];\n    }\n\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id; // switch to previously loaded playlists immediately\n\n    if (mediaChange && this.loadedPlaylists_[playlist.id] && this.loadedPlaylists_[playlist.id].endList) {\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n        this.trigger('mediachange');\n      }\n\n      return;\n    } // switching to the active playlist is a no-op\n\n\n    if (!mediaChange) {\n      return;\n    } // switching from an already loaded playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.addSidxSegments_(playlist, startingState, function (sidxChanged) {\n      // everything is ready just continue to haveMetadata\n      _this3.haveMetadata({\n        startingState: startingState,\n        playlist: playlist\n      });\n    });\n  };\n\n  _proto.haveMetadata = function haveMetadata(_ref2) {\n    var startingState = _ref2.startingState,\n        playlist = _ref2.playlist;\n    this.state = 'HAVE_METADATA';\n    this.loadedPlaylists_[playlist.id] = playlist;\n    this.mediaRequest_ = null; // This will trigger loadedplaylist\n\n    this.refreshMedia_(playlist.id); // fire loadedmetadata the first time a media playlist is loaded\n    // to resolve setup of media groups\n\n    if (startingState === 'HAVE_MASTER') {\n      this.trigger('loadedmetadata');\n    } else {\n      // trigger media change if the active media has been updated\n      this.trigger('mediachange');\n    }\n  };\n\n  _proto.pause = function pause() {\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n\n    if (this.isMaster_) {\n      window$1.clearTimeout(this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_);\n      this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    }\n  };\n\n  _proto.load = function load(isFinalRendition) {\n    var _this4 = this;\n\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    var media = this.media();\n\n    if (isFinalRendition) {\n      var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        return _this4.load();\n      }, delay);\n      return;\n    } // because the playlists are internal to the manifest, load should either load the\n    // main manifest, or do nothing but trigger an event\n\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      // Check to see if this is the master loader and the MUP was cleared (this happens\n      // when the loader was paused). `media` should be set at this point since one is always\n      // set during `start()`.\n      if (this.isMaster_ && !this.minimumUpdatePeriodTimeout_) {\n        // Trigger minimumUpdatePeriod to refresh the master manifest\n        this.trigger('minimumUpdatePeriod'); // Since there was no prior minimumUpdatePeriodTimeout it should be recreated\n\n        this.updateMinimumUpdatePeriodTimeout_();\n      }\n\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.start = function start() {\n    var _this5 = this;\n\n    this.started = true; // We don't need to request the master manifest again\n    // Call this asynchronously to match the xhr request behavior below\n\n    if (!this.isMaster_) {\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return _this5.haveMaster_();\n      }, 0);\n      return;\n    }\n\n    this.requestMaster_(function (req, masterChanged) {\n      _this5.haveMaster_();\n\n      if (!_this5.hasPendingRequest() && !_this5.media_) {\n        _this5.media(_this5.masterPlaylistLoader_.master.playlists[0]);\n      }\n    });\n  };\n\n  _proto.requestMaster_ = function requestMaster_(cb) {\n    var _this6 = this;\n\n    this.request = this.vhs_.xhr({\n      uri: this.masterPlaylistLoader_.srcUrl,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      if (_this6.requestErrored_(error, req)) {\n        if (_this6.state === 'HAVE_NOTHING') {\n          _this6.started = false;\n        }\n\n        return;\n      }\n\n      var masterChanged = req.responseText !== _this6.masterPlaylistLoader_.masterXml_;\n      _this6.masterPlaylistLoader_.masterXml_ = req.responseText;\n\n      if (req.responseHeaders && req.responseHeaders.date) {\n        _this6.masterLoaded_ = Date.parse(req.responseHeaders.date);\n      } else {\n        _this6.masterLoaded_ = Date.now();\n      }\n\n      _this6.masterPlaylistLoader_.srcUrl = resolveManifestRedirect(_this6.handleManifestRedirects, _this6.masterPlaylistLoader_.srcUrl, req);\n\n      if (masterChanged) {\n        _this6.handleMaster_();\n\n        _this6.syncClientServerClock_(function () {\n          return cb(req, masterChanged);\n        });\n\n        return;\n      }\n\n      return cb(req, masterChanged);\n    });\n  }\n  /**\n   * Parses the master xml for UTCTiming node to sync the client clock to the server\n   * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.\n   *\n   * @param {Function} done\n   *        Function to call when clock sync has completed\n   */\n  ;\n\n  _proto.syncClientServerClock_ = function syncClientServerClock_(done) {\n    var _this7 = this;\n\n    var utcTiming = parseUTCTiming(this.masterPlaylistLoader_.masterXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the\n    // server clock\n\n    if (utcTiming === null) {\n      this.masterPlaylistLoader_.clientOffset_ = this.masterLoaded_ - Date.now();\n      return done();\n    }\n\n    if (utcTiming.method === 'DIRECT') {\n      this.masterPlaylistLoader_.clientOffset_ = utcTiming.value - Date.now();\n      return done();\n    }\n\n    this.request = this.vhs_.xhr({\n      uri: resolveUrl(this.masterPlaylistLoader_.srcUrl, utcTiming.value),\n      method: utcTiming.method,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      }\n\n      if (error) {\n        // sync request failed, fall back to using date header from mpd\n        // TODO: log warning\n        _this7.masterPlaylistLoader_.clientOffset_ = _this7.masterLoaded_ - Date.now();\n        return done();\n      }\n\n      var serverTime;\n\n      if (utcTiming.method === 'HEAD') {\n        if (!req.responseHeaders || !req.responseHeaders.date) {\n          // expected date header not preset, fall back to using date header from mpd\n          // TODO: log warning\n          serverTime = _this7.masterLoaded_;\n        } else {\n          serverTime = Date.parse(req.responseHeaders.date);\n        }\n      } else {\n        serverTime = Date.parse(req.responseText);\n      }\n\n      _this7.masterPlaylistLoader_.clientOffset_ = serverTime - Date.now();\n      done();\n    });\n  };\n\n  _proto.haveMaster_ = function haveMaster_() {\n    this.state = 'HAVE_MASTER';\n\n    if (this.isMaster_) {\n      // We have the master playlist at this point, so\n      // trigger this to allow MasterPlaylistController\n      // to make an initial playlist selection\n      this.trigger('loadedplaylist');\n    } else if (!this.media_) {\n      // no media playlist was specifically selected so select\n      // the one the child playlist loader was created with\n      this.media(this.childPlaylist_);\n    }\n  };\n\n  _proto.handleMaster_ = function handleMaster_() {\n    // clear media request\n    this.mediaRequest_ = null;\n    var oldMaster = this.masterPlaylistLoader_.master;\n    var newMaster = parseMasterXml({\n      masterXml: this.masterPlaylistLoader_.masterXml_,\n      srcUrl: this.masterPlaylistLoader_.srcUrl,\n      clientOffset: this.masterPlaylistLoader_.clientOffset_,\n      sidxMapping: this.masterPlaylistLoader_.sidxMapping_,\n      previousManifest: oldMaster\n    }); // if we have an old master to compare the new master against\n\n    if (oldMaster) {\n      newMaster = updateMaster(oldMaster, newMaster, this.masterPlaylistLoader_.sidxMapping_);\n    } // only update master if we have a new master\n\n\n    this.masterPlaylistLoader_.master = newMaster ? newMaster : oldMaster;\n    var location = this.masterPlaylistLoader_.master.locations && this.masterPlaylistLoader_.master.locations[0];\n\n    if (location && location !== this.masterPlaylistLoader_.srcUrl) {\n      this.masterPlaylistLoader_.srcUrl = location;\n    }\n\n    if (!oldMaster || newMaster && newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n      this.updateMinimumUpdatePeriodTimeout_();\n    }\n\n    return Boolean(newMaster);\n  };\n\n  _proto.updateMinimumUpdatePeriodTimeout_ = function updateMinimumUpdatePeriodTimeout_() {\n    var mpl = this.masterPlaylistLoader_; // cancel any pending creation of mup on media\n    // a new one will be added if needed.\n\n    if (mpl.createMupOnMedia_) {\n      mpl.off('loadedmetadata', mpl.createMupOnMedia_);\n      mpl.createMupOnMedia_ = null;\n    } // clear any pending timeouts\n\n\n    if (mpl.minimumUpdatePeriodTimeout_) {\n      window$1.clearTimeout(mpl.minimumUpdatePeriodTimeout_);\n      mpl.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    var mup = mpl.master && mpl.master.minimumUpdatePeriod; // If the minimumUpdatePeriod has a value of 0, that indicates that the current\n    // MPD has no future validity, so a new one will need to be acquired when new\n    // media segments are to be made available. Thus, we use the target duration\n    // in this case\n\n    if (mup === 0) {\n      if (mpl.media()) {\n        mup = mpl.media().targetDuration * 1000;\n      } else {\n        mpl.createMupOnMedia_ = mpl.updateMinimumUpdatePeriodTimeout_;\n        mpl.one('loadedmetadata', mpl.createMupOnMedia_);\n      }\n    } // if minimumUpdatePeriod is invalid or <= zero, which\n    // can happen when a live video becomes VOD. skip timeout\n    // creation.\n\n\n    if (typeof mup !== 'number' || mup <= 0) {\n      if (mup < 0) {\n        this.logger_(\"found invalid minimumUpdatePeriod of \" + mup + \", not setting a timeout\");\n      }\n\n      return;\n    }\n\n    this.createMUPTimeout_(mup);\n  };\n\n  _proto.createMUPTimeout_ = function createMUPTimeout_(mup) {\n    var mpl = this.masterPlaylistLoader_;\n    mpl.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n      mpl.minimumUpdatePeriodTimeout_ = null;\n      mpl.trigger('minimumUpdatePeriod');\n      mpl.createMUPTimeout_(mup);\n    }, mup);\n  }\n  /**\n   * Sends request to refresh the master xml and updates the parsed master manifest\n   */\n  ;\n\n  _proto.refreshXml_ = function refreshXml_() {\n    var _this8 = this;\n\n    this.requestMaster_(function (req, masterChanged) {\n      if (!masterChanged) {\n        return;\n      }\n\n      if (_this8.media_) {\n        _this8.media_ = _this8.masterPlaylistLoader_.master.playlists[_this8.media_.id];\n      } // This will filter out updated sidx info from the mapping\n\n\n      _this8.masterPlaylistLoader_.sidxMapping_ = filterChangedSidxMappings(_this8.masterPlaylistLoader_.master, _this8.masterPlaylistLoader_.sidxMapping_);\n\n      _this8.addSidxSegments_(_this8.media(), _this8.state, function (sidxChanged) {\n        // TODO: do we need to reload the current playlist?\n        _this8.refreshMedia_(_this8.media().id);\n      });\n    });\n  }\n  /**\n   * Refreshes the media playlist by re-parsing the master xml and updating playlist\n   * references. If this is an alternate loader, the updated parsed manifest is retrieved\n   * from the master loader.\n   */\n  ;\n\n  _proto.refreshMedia_ = function refreshMedia_(mediaID) {\n    var _this9 = this;\n\n    if (!mediaID) {\n      throw new Error('refreshMedia_ must take a media id');\n    } // for master we have to reparse the master xml\n    // to re-create segments based on current timing values\n    // which may change media. We only skip updating master\n    // if this is the first time this.media_ is being set.\n    // as master was just parsed in that case.\n\n\n    if (this.media_ && this.isMaster_) {\n      this.handleMaster_();\n    }\n\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var mediaChanged = !this.media_ || this.media_ !== playlists[mediaID];\n\n    if (mediaChanged) {\n      this.media_ = playlists[mediaID];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    if (!this.mediaUpdateTimeout) {\n      var createMediaUpdateTimeout = function createMediaUpdateTimeout() {\n        if (_this9.media().endList) {\n          return;\n        }\n\n        _this9.mediaUpdateTimeout = window$1.setTimeout(function () {\n          _this9.trigger('mediaupdatetimeout');\n\n          createMediaUpdateTimeout();\n        }, refreshDelay(_this9.media(), Boolean(mediaChanged)));\n      };\n\n      createMediaUpdateTimeout();\n    }\n\n    this.trigger('loadedplaylist');\n  };\n\n  return DashPlaylistLoader;\n}(EventTarget);\n\nvar Config = {\n  GOAL_BUFFER_LENGTH: 30,\n  MAX_GOAL_BUFFER_LENGTH: 60,\n  BACK_BUFFER_LENGTH: 30,\n  GOAL_BUFFER_LENGTH_RATE: 1,\n  // 0.5 MB/s\n  INITIAL_BANDWIDTH: 4194304,\n  // A fudge factor to apply to advertised playlist bitrates to account for\n  // temporary flucations in client bandwidth\n  BANDWIDTH_VARIANCE: 1.2,\n  // How much of the buffer must be filled before we consider upswitching\n  BUFFER_LOW_WATER_LINE: 0,\n  MAX_BUFFER_LOW_WATER_LINE: 30,\n  // TODO: Remove this when experimentalBufferBasedABR is removed\n  EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE: 16,\n  BUFFER_LOW_WATER_LINE_RATE: 1,\n  // If the buffer is greater than the high water line, we won't switch down\n  BUFFER_HIGH_WATER_LINE: 30\n};\n\nvar stringToArrayBuffer = function stringToArrayBuffer(string) {\n  var view = new Uint8Array(new ArrayBuffer(string.length));\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view.buffer;\n};\n\n/* global Blob, BlobBuilder, Worker */\n// unify worker interface\nvar browserWorkerPolyFill = function browserWorkerPolyFill(workerObj) {\n  // node only supports on/off\n  workerObj.on = workerObj.addEventListener;\n  workerObj.off = workerObj.removeEventListener;\n  return workerObj;\n};\n\nvar createObjectURL = function createObjectURL(str) {\n  try {\n    return URL.createObjectURL(new Blob([str], {\n      type: 'application/javascript'\n    }));\n  } catch (e) {\n    var blob = new BlobBuilder();\n    blob.append(str);\n    return URL.createObjectURL(blob.getBlob());\n  }\n};\n\nvar factory = function factory(code) {\n  return function () {\n    var objectUrl = createObjectURL(code);\n    var worker = browserWorkerPolyFill(new Worker(objectUrl));\n    worker.objURL = objectUrl;\n    var terminate = worker.terminate;\n    worker.on = worker.addEventListener;\n    worker.off = worker.removeEventListener;\n\n    worker.terminate = function () {\n      URL.revokeObjectURL(objectUrl);\n      return terminate.call(this);\n    };\n\n    return worker;\n  };\n};\nvar transform = function transform(code) {\n  return \"var browserWorkerPolyFill = \" + browserWorkerPolyFill.toString() + \";\\n\" + 'browserWorkerPolyFill(self);\\n' + code;\n};\n\nvar getWorkerString = function getWorkerString(fn) {\n  return fn.toString().replace(/^function.+?{/, '').slice(0, -1);\n};\n\n/* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\nvar workerCode$1 = transform(getWorkerString(function () {\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * A lightweight readable stream implemention that handles event dispatching.\n   * Objects that inherit from streams should call init in their constructors.\n   */\n\n  var Stream = function Stream() {\n    this.init = function () {\n      var listeners = {};\n      /**\n       * Add a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} the callback to be invoked when an event of\n       * the specified type occurs\n       */\n\n      this.on = function (type, listener) {\n        if (!listeners[type]) {\n          listeners[type] = [];\n        }\n\n        listeners[type] = listeners[type].concat(listener);\n      };\n      /**\n       * Remove a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} a function previously registered for this\n       * type of event through `on`\n       */\n\n\n      this.off = function (type, listener) {\n        var index;\n\n        if (!listeners[type]) {\n          return false;\n        }\n\n        index = listeners[type].indexOf(listener);\n        listeners[type] = listeners[type].slice();\n        listeners[type].splice(index, 1);\n        return index > -1;\n      };\n      /**\n       * Trigger an event of the specified type on this stream. Any additional\n       * arguments to this function are passed as parameters to event listeners.\n       * @param type {string} the event name\n       */\n\n\n      this.trigger = function (type) {\n        var callbacks, i, length, args;\n        callbacks = listeners[type];\n\n        if (!callbacks) {\n          return;\n        } // Slicing the arguments on every invocation of this method\n        // can add a significant amount of overhead. Avoid the\n        // intermediate object creation for the common case of a\n        // single callback argument\n\n\n        if (arguments.length === 2) {\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].call(this, arguments[1]);\n          }\n        } else {\n          args = [];\n          i = arguments.length;\n\n          for (i = 1; i < arguments.length; ++i) {\n            args.push(arguments[i]);\n          }\n\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].apply(this, args);\n          }\n        }\n      };\n      /**\n       * Destroys the stream and cleans up.\n       */\n\n\n      this.dispose = function () {\n        listeners = {};\n      };\n    };\n  };\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   * @param destination {stream} the stream that will receive all `data` events\n   * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n   *                            when the current stream emits a 'done' event\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n\n\n  Stream.prototype.pipe = function (destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n    this.on('done', function (flushSource) {\n      destination.flush(flushSource);\n    });\n    this.on('partialdone', function (flushSource) {\n      destination.partialFlush(flushSource);\n    });\n    this.on('endedtimeline', function (flushSource) {\n      destination.endTimeline(flushSource);\n    });\n    this.on('reset', function (flushSource) {\n      destination.reset(flushSource);\n    });\n    return destination;\n  }; // Default stream functions that are expected to be overridden to perform\n  // actual work. These are provided by the prototype as a sort of no-op\n  // implementation so that we don't have to check for their existence in the\n  // `pipe` function above.\n\n\n  Stream.prototype.push = function (data) {\n    this.trigger('data', data);\n  };\n\n  Stream.prototype.flush = function (flushSource) {\n    this.trigger('done', flushSource);\n  };\n\n  Stream.prototype.partialFlush = function (flushSource) {\n    this.trigger('partialdone', flushSource);\n  };\n\n  Stream.prototype.endTimeline = function (flushSource) {\n    this.trigger('endedtimeline', flushSource);\n  };\n\n  Stream.prototype.reset = function (flushSource) {\n    this.trigger('reset', flushSource);\n  };\n\n  var stream = Stream;\n  var MAX_UINT32$1 = Math.pow(2, 32);\n\n  var getUint64$2 = function getUint64(uint8) {\n    var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n    var value;\n\n    if (dv.getBigUint64) {\n      value = dv.getBigUint64(0);\n\n      if (value < Number.MAX_SAFE_INTEGER) {\n        return Number(value);\n      }\n\n      return value;\n    }\n\n    return dv.getUint32(0) * MAX_UINT32$1 + dv.getUint32(4);\n  };\n\n  var numbers = {\n    getUint64: getUint64$2,\n    MAX_UINT32: MAX_UINT32$1\n  };\n  var MAX_UINT32 = numbers.MAX_UINT32;\n  var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun$1, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants\n\n  (function () {\n    var i;\n    types = {\n      avc1: [],\n      // codingname\n      avcC: [],\n      btrt: [],\n      dinf: [],\n      dref: [],\n      esds: [],\n      ftyp: [],\n      hdlr: [],\n      mdat: [],\n      mdhd: [],\n      mdia: [],\n      mfhd: [],\n      minf: [],\n      moof: [],\n      moov: [],\n      mp4a: [],\n      // codingname\n      mvex: [],\n      mvhd: [],\n      pasp: [],\n      sdtp: [],\n      smhd: [],\n      stbl: [],\n      stco: [],\n      stsc: [],\n      stsd: [],\n      stsz: [],\n      stts: [],\n      styp: [],\n      tfdt: [],\n      tfhd: [],\n      traf: [],\n      trak: [],\n      trun: [],\n      trex: [],\n      tkhd: [],\n      vmhd: []\n    }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n    // don't throw an error\n\n    if (typeof Uint8Array === 'undefined') {\n      return;\n    }\n\n    for (i in types) {\n      if (types.hasOwnProperty(i)) {\n        types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];\n      }\n    }\n\n    MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);\n    AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);\n    MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n    VIDEO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n    ]);\n    AUDIO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n    ]);\n    HDLR_TYPES = {\n      video: VIDEO_HDLR,\n      audio: AUDIO_HDLR\n    };\n    DREF = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // entry_count\n    0x00, 0x00, 0x00, 0x0c, // entry_size\n    0x75, 0x72, 0x6c, 0x20, // 'url' type\n    0x00, // version 0\n    0x00, 0x00, 0x01 // entry_flags\n    ]);\n    SMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, // balance, 0 means centered\n    0x00, 0x00 // reserved\n    ]);\n    STCO = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00 // entry_count\n    ]);\n    STSC = STCO;\n    STSZ = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // sample_size\n    0x00, 0x00, 0x00, 0x00 // sample_count\n    ]);\n    STTS = STCO;\n    VMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x01, // flags\n    0x00, 0x00, // graphicsmode\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor\n    ]);\n  })();\n\n  box = function box(type) {\n    var payload = [],\n        size = 0,\n        i,\n        result,\n        view;\n\n    for (i = 1; i < arguments.length; i++) {\n      payload.push(arguments[i]);\n    }\n\n    i = payload.length; // calculate the total size we need to allocate\n\n    while (i--) {\n      size += payload[i].byteLength;\n    }\n\n    result = new Uint8Array(size + 8);\n    view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n    view.setUint32(0, result.byteLength);\n    result.set(type, 4); // copy the payload into the result\n\n    for (i = 0, size = 8; i < payload.length; i++) {\n      result.set(payload[i], size);\n      size += payload[i].byteLength;\n    }\n\n    return result;\n  };\n\n  dinf = function dinf() {\n    return box(types.dinf, box(types.dref, DREF));\n  };\n\n  esds = function esds(track) {\n    return box(types.esds, new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    // ES_Descriptor\n    0x03, // tag, ES_DescrTag\n    0x19, // length\n    0x00, 0x00, // ES_ID\n    0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority\n    // DecoderConfigDescriptor\n    0x04, // tag, DecoderConfigDescrTag\n    0x11, // length\n    0x40, // object type\n    0x15, // streamType\n    0x00, 0x06, 0x00, // bufferSizeDB\n    0x00, 0x00, 0xda, 0xc0, // maxBitrate\n    0x00, 0x00, 0xda, 0xc0, // avgBitrate\n    // DecoderSpecificInfo\n    0x05, // tag, DecoderSpecificInfoTag\n    0x02, // length\n    // ISO/IEC 14496-3, AudioSpecificConfig\n    // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n    track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig\n    ]));\n  };\n\n  ftyp = function ftyp() {\n    return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n  };\n\n  hdlr = function hdlr(type) {\n    return box(types.hdlr, HDLR_TYPES[type]);\n  };\n\n  mdat = function mdat(data) {\n    return box(types.mdat, data);\n  };\n\n  mdhd = function mdhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x02, // creation_time\n    0x00, 0x00, 0x00, 0x03, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF, // duration\n    0x55, 0xc4, // 'und' language (undetermined)\n    0x00, 0x00]); // Use the sample rate from the track metadata, when it is\n    // defined. The sample rate can be parsed out of an ADTS header, for\n    // instance.\n\n    if (track.samplerate) {\n      result[12] = track.samplerate >>> 24 & 0xFF;\n      result[13] = track.samplerate >>> 16 & 0xFF;\n      result[14] = track.samplerate >>> 8 & 0xFF;\n      result[15] = track.samplerate & 0xFF;\n    }\n\n    return box(types.mdhd, result);\n  };\n\n  mdia = function mdia(track) {\n    return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n  };\n\n  mfhd = function mfhd(sequenceNumber) {\n    return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00, // flags\n    (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number\n    ]));\n  };\n\n  minf = function minf(track) {\n    return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));\n  };\n\n  moof = function moof(sequenceNumber, tracks) {\n    var trackFragments = [],\n        i = tracks.length; // build traf boxes for each track fragment\n\n    while (i--) {\n      trackFragments[i] = traf(tracks[i]);\n    }\n\n    return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));\n  };\n  /**\n   * Returns a movie box.\n   * @param tracks {array} the tracks associated with this movie\n   * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n   */\n\n\n  moov = function moov(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trak(tracks[i]);\n    }\n\n    return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n  };\n\n  mvex = function mvex(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trex(tracks[i]);\n    }\n\n    return box.apply(null, [types.mvex].concat(boxes));\n  };\n\n  mvhd = function mvhd(duration) {\n    var bytes = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // creation_time\n    0x00, 0x00, 0x00, 0x02, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration\n    0x00, 0x01, 0x00, 0x00, // 1.0 rate\n    0x01, 0x00, // 1.0 volume\n    0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n    0xff, 0xff, 0xff, 0xff // next_track_ID\n    ]);\n    return box(types.mvhd, bytes);\n  };\n\n  sdtp = function sdtp(track) {\n    var samples = track.samples || [],\n        bytes = new Uint8Array(4 + samples.length),\n        flags,\n        i; // leave the full box header (4 bytes) all zero\n    // write the sample table\n\n    for (i = 0; i < samples.length; i++) {\n      flags = samples[i].flags;\n      bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;\n    }\n\n    return box(types.sdtp, bytes);\n  };\n\n  stbl = function stbl(track) {\n    return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));\n  };\n\n  (function () {\n    var videoSample, audioSample;\n\n    stsd = function stsd(track) {\n      return box(types.stsd, new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));\n    };\n\n    videoSample = function videoSample(track) {\n      var sps = track.sps || [],\n          pps = track.pps || [],\n          sequenceParameterSets = [],\n          pictureParameterSets = [],\n          i,\n          avc1Box; // assemble the SPSs\n\n      for (i = 0; i < sps.length; i++) {\n        sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n        sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength\n\n        sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n      } // assemble the PPSs\n\n\n      for (i = 0; i < pps.length; i++) {\n        pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n        pictureParameterSets.push(pps[i].byteLength & 0xFF);\n        pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n      }\n\n      avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n      (track.width & 0xff00) >> 8, track.width & 0xff, // width\n      (track.height & 0xff00) >> 8, track.height & 0xff, // height\n      0x00, 0x48, 0x00, 0x00, // horizresolution\n      0x00, 0x48, 0x00, 0x00, // vertresolution\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // frame_count\n      0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // compressorname\n      0x00, 0x18, // depth = 24\n      0x11, 0x11 // pre_defined = -1\n      ]), box(types.avcC, new Uint8Array([0x01, // configurationVersion\n      track.profileIdc, // AVCProfileIndication\n      track.profileCompatibility, // profile_compatibility\n      track.levelIdc, // AVCLevelIndication\n      0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n      ].concat([sps.length], // numOfSequenceParameterSets\n      sequenceParameterSets, // \"SPS\"\n      [pps.length], // numOfPictureParameterSets\n      pictureParameterSets // \"PPS\"\n      ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB\n      0x00, 0x2d, 0xc6, 0xc0, // maxBitrate\n      0x00, 0x2d, 0xc6, 0xc0 // avgBitrate\n      ]))];\n\n      if (track.sarRatio) {\n        var hSpacing = track.sarRatio[0],\n            vSpacing = track.sarRatio[1];\n        avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));\n      }\n\n      return box.apply(null, avc1Box);\n    };\n\n    audioSample = function audioSample(track) {\n      return box(types.mp4a, new Uint8Array([// SampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      // AudioSampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff, // channelcount\n      (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff, // samplesize\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16\n      // MP4AudioSampleEntry, ISO/IEC 14496-14\n      ]), esds(track));\n    };\n  })();\n\n  tkhd = function tkhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x07, // flags\n    0x00, 0x00, 0x00, 0x00, // creation_time\n    0x00, 0x00, 0x00, 0x00, // modification_time\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x00, // reserved\n    (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, // layer\n    0x00, 0x00, // alternate_group\n    0x01, 0x00, // non-audio track volume\n    0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width\n    (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height\n    ]);\n    return box(types.tkhd, result);\n  };\n  /**\n   * Generate a track fragment (traf) box. A traf box collects metadata\n   * about tracks in a movie fragment (moof) box.\n   */\n\n\n  traf = function traf(track) {\n    var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n    trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x3a, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x00, 0x00, 0x00 // default_sample_flags\n    ]));\n    upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / MAX_UINT32);\n    lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % MAX_UINT32);\n    trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01, // version 1\n    0x00, 0x00, 0x00, // flags\n    // baseMediaDecodeTime\n    upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of\n    // the containing moof to the first payload byte of the associated\n    // mdat\n\n    dataOffset = 32 + // tfhd\n    20 + // tfdt\n    8 + // traf header\n    16 + // mfhd\n    8 + // moof header\n    8; // mdat header\n    // audio tracks require less metadata\n\n    if (track.type === 'audio') {\n      trackFragmentRun = trun$1(track, dataOffset);\n      return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);\n    } // video tracks should contain an independent and disposable samples\n    // box (sdtp)\n    // generate one and adjust offsets to match\n\n\n    sampleDependencyTable = sdtp(track);\n    trackFragmentRun = trun$1(track, sampleDependencyTable.length + dataOffset);\n    return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);\n  };\n  /**\n   * Generate a track box.\n   * @param track {object} a track definition\n   * @return {Uint8Array} the track box\n   */\n\n\n  trak = function trak(track) {\n    track.duration = track.duration || 0xffffffff;\n    return box(types.trak, tkhd(track), mdia(track));\n  };\n\n  trex = function trex(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // default_sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x01, 0x00, 0x01 // default_sample_flags\n    ]); // the last two bytes of default_sample_flags is the sample\n    // degradation priority, a hint about the importance of this sample\n    // relative to others. Lower the degradation priority for all sample\n    // types other than video.\n\n    if (track.type !== 'video') {\n      result[result.length - 1] = 0x00;\n    }\n\n    return box(types.trex, result);\n  };\n\n  (function () {\n    var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a\n    // duration is present for the first sample, it will be present for\n    // all subsequent samples.\n    // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n\n    trunHeader = function trunHeader(samples, offset) {\n      var durationPresent = 0,\n          sizePresent = 0,\n          flagsPresent = 0,\n          compositionTimeOffset = 0; // trun flag constants\n\n      if (samples.length) {\n        if (samples[0].duration !== undefined) {\n          durationPresent = 0x1;\n        }\n\n        if (samples[0].size !== undefined) {\n          sizePresent = 0x2;\n        }\n\n        if (samples[0].flags !== undefined) {\n          flagsPresent = 0x4;\n        }\n\n        if (samples[0].compositionTimeOffset !== undefined) {\n          compositionTimeOffset = 0x8;\n        }\n      }\n\n      return [0x00, // version 0\n      0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags\n      (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count\n      (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset\n      ];\n    };\n\n    videoTrun = function videoTrun(track, offset) {\n      var bytesOffest, bytes, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 16 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 16);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n\n        bytes[bytesOffest++] = sample.flags.isLeading << 2 | sample.flags.dependsOn;\n        bytes[bytesOffest++] = sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0xF0 << 8;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0x0F; // sample_flags\n\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.compositionTimeOffset & 0xFF; // sample_composition_time_offset\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    audioTrun = function audioTrun(track, offset) {\n      var bytes, bytesOffest, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 8 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 8);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    trun$1 = function trun(track, offset) {\n      if (track.type === 'audio') {\n        return audioTrun(track, offset);\n      }\n\n      return videoTrun(track, offset);\n    };\n  })();\n\n  var mp4Generator = {\n    ftyp: ftyp,\n    mdat: mdat,\n    moof: moof,\n    moov: moov,\n    initSegment: function initSegment(tracks) {\n      var fileType = ftyp(),\n          movie = moov(tracks),\n          result;\n      result = new Uint8Array(fileType.byteLength + movie.byteLength);\n      result.set(fileType);\n      result.set(movie, fileType.byteLength);\n      return result;\n    }\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n  // Convert an array of nal units into an array of frames with each frame being\n  // composed of the nal units that make up that frame\n  // Also keep track of cummulative data about the frame from the nal units such\n  // as the frame duration, starting pts, etc.\n\n  var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {\n    var i,\n        currentNal,\n        currentFrame = [],\n        frames = []; // TODO added for LHLS, make sure this is OK\n\n    frames.byteLength = 0;\n    frames.nalCount = 0;\n    frames.duration = 0;\n    currentFrame.byteLength = 0;\n\n    for (i = 0; i < nalUnits.length; i++) {\n      currentNal = nalUnits[i]; // Split on 'aud'-type nal units\n\n      if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n        // Since the very first nal unit is expected to be an AUD\n        // only push to the frames array when currentFrame is not empty\n        if (currentFrame.length) {\n          currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK\n\n          frames.byteLength += currentFrame.byteLength;\n          frames.nalCount += currentFrame.length;\n          frames.duration += currentFrame.duration;\n          frames.push(currentFrame);\n        }\n\n        currentFrame = [currentNal];\n        currentFrame.byteLength = currentNal.data.byteLength;\n        currentFrame.pts = currentNal.pts;\n        currentFrame.dts = currentNal.dts;\n      } else {\n        // Specifically flag key frames for ease of use later\n        if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n          currentFrame.keyFrame = true;\n        }\n\n        currentFrame.duration = currentNal.dts - currentFrame.dts;\n        currentFrame.byteLength += currentNal.data.byteLength;\n        currentFrame.push(currentNal);\n      }\n    } // For the last frame, use the duration of the previous frame if we\n    // have nothing better to go on\n\n\n    if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {\n      currentFrame.duration = frames[frames.length - 1].duration;\n    } // Push the final frame\n    // TODO added for LHLS, make sure this is OK\n\n\n    frames.byteLength += currentFrame.byteLength;\n    frames.nalCount += currentFrame.length;\n    frames.duration += currentFrame.duration;\n    frames.push(currentFrame);\n    return frames;\n  }; // Convert an array of frames into an array of Gop with each Gop being composed\n  // of the frames that make up that Gop\n  // Also keep track of cummulative data about the Gop from the frames such as the\n  // Gop duration, starting pts, etc.\n\n\n  var groupFramesIntoGops = function groupFramesIntoGops(frames) {\n    var i,\n        currentFrame,\n        currentGop = [],\n        gops = []; // We must pre-set some of the values on the Gop since we\n    // keep running totals of these values\n\n    currentGop.byteLength = 0;\n    currentGop.nalCount = 0;\n    currentGop.duration = 0;\n    currentGop.pts = frames[0].pts;\n    currentGop.dts = frames[0].dts; // store some metadata about all the Gops\n\n    gops.byteLength = 0;\n    gops.nalCount = 0;\n    gops.duration = 0;\n    gops.pts = frames[0].pts;\n    gops.dts = frames[0].dts;\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n\n      if (currentFrame.keyFrame) {\n        // Since the very first frame is expected to be an keyframe\n        // only push to the gops array when currentGop is not empty\n        if (currentGop.length) {\n          gops.push(currentGop);\n          gops.byteLength += currentGop.byteLength;\n          gops.nalCount += currentGop.nalCount;\n          gops.duration += currentGop.duration;\n        }\n\n        currentGop = [currentFrame];\n        currentGop.nalCount = currentFrame.length;\n        currentGop.byteLength = currentFrame.byteLength;\n        currentGop.pts = currentFrame.pts;\n        currentGop.dts = currentFrame.dts;\n        currentGop.duration = currentFrame.duration;\n      } else {\n        currentGop.duration += currentFrame.duration;\n        currentGop.nalCount += currentFrame.length;\n        currentGop.byteLength += currentFrame.byteLength;\n        currentGop.push(currentFrame);\n      }\n    }\n\n    if (gops.length && currentGop.duration <= 0) {\n      currentGop.duration = gops[gops.length - 1].duration;\n    }\n\n    gops.byteLength += currentGop.byteLength;\n    gops.nalCount += currentGop.nalCount;\n    gops.duration += currentGop.duration; // push the final Gop\n\n    gops.push(currentGop);\n    return gops;\n  };\n  /*\n   * Search for the first keyframe in the GOPs and throw away all frames\n   * until that keyframe. Then extend the duration of the pulled keyframe\n   * and pull the PTS and DTS of the keyframe so that it covers the time\n   * range of the frames that were disposed.\n   *\n   * @param {Array} gops video GOPs\n   * @returns {Array} modified video GOPs\n   */\n\n\n  var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {\n    var currentGop;\n\n    if (!gops[0][0].keyFrame && gops.length > 1) {\n      // Remove the first GOP\n      currentGop = gops.shift();\n      gops.byteLength -= currentGop.byteLength;\n      gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the\n      // first gop to cover the time period of the\n      // frames we just removed\n\n      gops[0][0].dts = currentGop.dts;\n      gops[0][0].pts = currentGop.pts;\n      gops[0][0].duration += currentGop.duration;\n    }\n\n    return gops;\n  };\n  /**\n   * Default sample object\n   * see ISO/IEC 14496-12:2012, section 8.6.4.3\n   */\n\n\n  var createDefaultSample = function createDefaultSample() {\n    return {\n      size: 0,\n      flags: {\n        isLeading: 0,\n        dependsOn: 1,\n        isDependedOn: 0,\n        hasRedundancy: 0,\n        degradationPriority: 0,\n        isNonSyncSample: 1\n      }\n    };\n  };\n  /*\n   * Collates information from a video frame into an object for eventual\n   * entry into an MP4 sample table.\n   *\n   * @param {Object} frame the video frame\n   * @param {Number} dataOffset the byte offset to position the sample\n   * @return {Object} object containing sample table info for a frame\n   */\n\n\n  var sampleForFrame = function sampleForFrame(frame, dataOffset) {\n    var sample = createDefaultSample();\n    sample.dataOffset = dataOffset;\n    sample.compositionTimeOffset = frame.pts - frame.dts;\n    sample.duration = frame.duration;\n    sample.size = 4 * frame.length; // Space for nal unit size\n\n    sample.size += frame.byteLength;\n\n    if (frame.keyFrame) {\n      sample.flags.dependsOn = 2;\n      sample.flags.isNonSyncSample = 0;\n    }\n\n    return sample;\n  }; // generate the track's sample table from an array of gops\n\n\n  var generateSampleTable$1 = function generateSampleTable(gops, baseDataOffset) {\n    var h,\n        i,\n        sample,\n        currentGop,\n        currentFrame,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h];\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i];\n        sample = sampleForFrame(currentFrame, dataOffset);\n        dataOffset += sample.size;\n        samples.push(sample);\n      }\n    }\n\n    return samples;\n  }; // generate the track's raw mdat data from an array of gops\n\n\n  var concatenateNalData = function concatenateNalData(gops) {\n    var h,\n        i,\n        j,\n        currentGop,\n        currentFrame,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = gops.byteLength,\n        numberOfNals = gops.nalCount,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each Gop..\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h]; // For each Frame..\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i]; // For each NAL..\n\n        for (j = 0; j < currentFrame.length; j++) {\n          currentNal = currentFrame[j];\n          view.setUint32(dataOffset, currentNal.data.byteLength);\n          dataOffset += 4;\n          data.set(currentNal.data, dataOffset);\n          dataOffset += currentNal.data.byteLength;\n        }\n      }\n    }\n\n    return data;\n  }; // generate the track's sample table from a frame\n\n\n  var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {\n    var sample,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n    sample = sampleForFrame(frame, dataOffset);\n    samples.push(sample);\n    return samples;\n  }; // generate the track's raw mdat data from a frame\n\n\n  var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {\n    var i,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = frame.byteLength,\n        numberOfNals = frame.length,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each NAL..\n\n    for (i = 0; i < frame.length; i++) {\n      currentNal = frame[i];\n      view.setUint32(dataOffset, currentNal.data.byteLength);\n      dataOffset += 4;\n      data.set(currentNal.data, dataOffset);\n      dataOffset += currentNal.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var frameUtils = {\n    groupNalsIntoFrames: groupNalsIntoFrames,\n    groupFramesIntoGops: groupFramesIntoGops,\n    extendFirstKeyFrame: extendFirstKeyFrame,\n    generateSampleTable: generateSampleTable$1,\n    concatenateNalData: concatenateNalData,\n    generateSampleTableForFrame: generateSampleTableForFrame,\n    concatenateNalDataForFrame: concatenateNalDataForFrame\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var highPrefix = [33, 16, 5, 32, 164, 27];\n  var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\n\n  var zeroFill = function zeroFill(count) {\n    var a = [];\n\n    while (count--) {\n      a.push(0);\n    }\n\n    return a;\n  };\n\n  var makeTable = function makeTable(metaTable) {\n    return Object.keys(metaTable).reduce(function (obj, key) {\n      obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {\n        return arr.concat(part);\n      }, []));\n      return obj;\n    }, {});\n  };\n\n  var silence;\n\n  var silence_1 = function silence_1() {\n    if (!silence) {\n      // Frames-of-silence to use for filling in missing AAC frames\n      var coneOfSilence = {\n        96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n        88200: [highPrefix, [231], zeroFill(170), [56]],\n        64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n        48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n        44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n        32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n        24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n        16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n        12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n        11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n        8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n      };\n      silence = makeTable(coneOfSilence);\n    }\n\n    return silence;\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n\n  var ONE_SECOND_IN_TS$4 = 90000,\n      // 90kHz clock\n  secondsToVideoTs,\n      secondsToAudioTs,\n      videoTsToSeconds,\n      audioTsToSeconds,\n      audioTsToVideoTs,\n      videoTsToAudioTs,\n      metadataTsToSeconds;\n\n  secondsToVideoTs = function secondsToVideoTs(seconds) {\n    return seconds * ONE_SECOND_IN_TS$4;\n  };\n\n  secondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {\n    return seconds * sampleRate;\n  };\n\n  videoTsToSeconds = function videoTsToSeconds(timestamp) {\n    return timestamp / ONE_SECOND_IN_TS$4;\n  };\n\n  audioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {\n    return timestamp / sampleRate;\n  };\n\n  audioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {\n    return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n  };\n\n  videoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {\n    return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n  };\n  /**\n   * Adjust ID3 tag or caption timing information by the timeline pts values\n   * (if keepOriginalTimestamps is false) and convert to seconds\n   */\n\n\n  metadataTsToSeconds = function metadataTsToSeconds(timestamp, timelineStartPts, keepOriginalTimestamps) {\n    return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n  };\n\n  var clock = {\n    ONE_SECOND_IN_TS: ONE_SECOND_IN_TS$4,\n    secondsToVideoTs: secondsToVideoTs,\n    secondsToAudioTs: secondsToAudioTs,\n    videoTsToSeconds: videoTsToSeconds,\n    audioTsToSeconds: audioTsToSeconds,\n    audioTsToVideoTs: audioTsToVideoTs,\n    videoTsToAudioTs: videoTsToAudioTs,\n    metadataTsToSeconds: metadataTsToSeconds\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  /**\n   * Sum the `byteLength` properties of the data in each AAC frame\n   */\n\n  var sumFrameByteLengths = function sumFrameByteLengths(array) {\n    var i,\n        currentObj,\n        sum = 0; // sum the byteLength's all each nal unit in the frame\n\n    for (i = 0; i < array.length; i++) {\n      currentObj = array[i];\n      sum += currentObj.data.byteLength;\n    }\n\n    return sum;\n  }; // Possibly pad (prefix) the audio track with silence if appending this track\n  // would lead to the introduction of a gap in the audio buffer\n\n\n  var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {\n    var baseMediaDecodeTimeTs,\n        frameDuration = 0,\n        audioGapDuration = 0,\n        audioFillFrameCount = 0,\n        audioFillDuration = 0,\n        silentFrame,\n        i,\n        firstFrame;\n\n    if (!frames.length) {\n      return;\n    }\n\n    baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills\n\n    frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));\n\n    if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n      // insert the shortest possible amount (audio gap or audio to video gap)\n      audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap\n\n      audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n      audioFillDuration = audioFillFrameCount * frameDuration;\n    } // don't attempt to fill gaps smaller than a single frame or larger\n    // than a half second\n\n\n    if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {\n      return;\n    }\n\n    silentFrame = silence_1()[track.samplerate];\n\n    if (!silentFrame) {\n      // we don't have a silent frame pregenerated for the sample rate, so use a frame\n      // from the content instead\n      silentFrame = frames[0].data;\n    }\n\n    for (i = 0; i < audioFillFrameCount; i++) {\n      firstFrame = frames[0];\n      frames.splice(0, 0, {\n        data: silentFrame,\n        dts: firstFrame.dts - frameDuration,\n        pts: firstFrame.pts - frameDuration\n      });\n    }\n\n    track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));\n    return audioFillDuration;\n  }; // If the audio segment extends before the earliest allowed dts\n  // value, remove AAC frames until starts at or after the earliest\n  // allowed DTS so that we don't end up with a negative baseMedia-\n  // DecodeTime for the audio track\n\n\n  var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {\n    if (track.minSegmentDts >= earliestAllowedDts) {\n      return adtsFrames;\n    } // We will need to recalculate the earliest segment Dts\n\n\n    track.minSegmentDts = Infinity;\n    return adtsFrames.filter(function (currentFrame) {\n      // If this is an allowed frame, keep it and record it's Dts\n      if (currentFrame.dts >= earliestAllowedDts) {\n        track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n        track.minSegmentPts = track.minSegmentDts;\n        return true;\n      } // Otherwise, discard it\n\n\n      return false;\n    });\n  }; // generate the track's raw mdat data from an array of frames\n\n\n  var generateSampleTable = function generateSampleTable(frames) {\n    var i,\n        currentFrame,\n        samples = [];\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      samples.push({\n        size: currentFrame.data.byteLength,\n        duration: 1024 // For AAC audio, all samples contain 1024 samples\n\n      });\n    }\n\n    return samples;\n  }; // generate the track's sample table from an array of frames\n\n\n  var concatenateFrameData = function concatenateFrameData(frames) {\n    var i,\n        currentFrame,\n        dataOffset = 0,\n        data = new Uint8Array(sumFrameByteLengths(frames));\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      data.set(currentFrame.data, dataOffset);\n      dataOffset += currentFrame.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var audioFrameUtils = {\n    prefixWithSilence: prefixWithSilence,\n    trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,\n    generateSampleTable: generateSampleTable,\n    concatenateFrameData: concatenateFrameData\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ONE_SECOND_IN_TS$3 = clock.ONE_SECOND_IN_TS;\n  /**\n   * Store information about the start and end of the track and the\n   * duration for each frame/sample we process in order to calculate\n   * the baseMediaDecodeTime\n   */\n\n  var collectDtsInfo = function collectDtsInfo(track, data) {\n    if (typeof data.pts === 'number') {\n      if (track.timelineStartInfo.pts === undefined) {\n        track.timelineStartInfo.pts = data.pts;\n      }\n\n      if (track.minSegmentPts === undefined) {\n        track.minSegmentPts = data.pts;\n      } else {\n        track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n      }\n\n      if (track.maxSegmentPts === undefined) {\n        track.maxSegmentPts = data.pts;\n      } else {\n        track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n      }\n    }\n\n    if (typeof data.dts === 'number') {\n      if (track.timelineStartInfo.dts === undefined) {\n        track.timelineStartInfo.dts = data.dts;\n      }\n\n      if (track.minSegmentDts === undefined) {\n        track.minSegmentDts = data.dts;\n      } else {\n        track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n      }\n\n      if (track.maxSegmentDts === undefined) {\n        track.maxSegmentDts = data.dts;\n      } else {\n        track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n      }\n    }\n  };\n  /**\n   * Clear values used to calculate the baseMediaDecodeTime between\n   * tracks\n   */\n\n\n  var clearDtsInfo = function clearDtsInfo(track) {\n    delete track.minSegmentDts;\n    delete track.maxSegmentDts;\n    delete track.minSegmentPts;\n    delete track.maxSegmentPts;\n  };\n  /**\n   * Calculate the track's baseMediaDecodeTime based on the earliest\n   * DTS the transmuxer has ever seen and the minimum DTS for the\n   * current track\n   * @param track {object} track metadata configuration\n   * @param keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {\n    var baseMediaDecodeTime,\n        scale,\n        minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.\n\n    if (!keepOriginalTimestamps) {\n      minSegmentDts -= track.timelineStartInfo.dts;\n    } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n    // we want the start of the first segment to be placed\n\n\n    baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first\n\n    baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative\n\n    baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n\n    if (track.type === 'audio') {\n      // Audio has a different clock equal to the sampling_rate so we need to\n      // scale the PTS values into the clock rate of the track\n      scale = track.samplerate / ONE_SECOND_IN_TS$3;\n      baseMediaDecodeTime *= scale;\n      baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n    }\n\n    return baseMediaDecodeTime;\n  };\n\n  var trackDecodeInfo = {\n    clearDtsInfo: clearDtsInfo,\n    calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,\n    collectDtsInfo: collectDtsInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Reads in-band caption information from a video elementary\n   * stream. Captions must follow the CEA-708 standard for injection\n   * into an MPEG-2 transport streams.\n   * @see https://en.wikipedia.org/wiki/CEA-708\n   * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n   */\n  // payload type field to indicate how they are to be\n  // interpreted. CEAS-708 caption content is always transmitted with\n  // payload type 0x04.\n\n  var USER_DATA_REGISTERED_ITU_T_T35 = 4,\n      RBSP_TRAILING_BITS = 128;\n  /**\n    * Parse a supplemental enhancement information (SEI) NAL unit.\n    * Stops parsing once a message of type ITU T T35 has been found.\n    *\n    * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n    * @return {object} the parsed SEI payload\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n    */\n\n  var parseSei = function parseSei(bytes) {\n    var i = 0,\n        result = {\n      payloadType: -1,\n      payloadSize: 0\n    },\n        payloadType = 0,\n        payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n    while (i < bytes.byteLength) {\n      // stop once we have hit the end of the sei_rbsp\n      if (bytes[i] === RBSP_TRAILING_BITS) {\n        break;\n      } // Parse payload type\n\n\n      while (bytes[i] === 0xFF) {\n        payloadType += 255;\n        i++;\n      }\n\n      payloadType += bytes[i++]; // Parse payload size\n\n      while (bytes[i] === 0xFF) {\n        payloadSize += 255;\n        i++;\n      }\n\n      payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n      // there can only ever be one caption message in a frame's sei\n\n      if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n        var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);\n\n        if (userIdentifier === 'GA94') {\n          result.payloadType = payloadType;\n          result.payloadSize = payloadSize;\n          result.payload = bytes.subarray(i, i + payloadSize);\n          break;\n        } else {\n          result.payload = void 0;\n        }\n      } // skip the payload and parse the next message\n\n\n      i += payloadSize;\n      payloadType = 0;\n      payloadSize = 0;\n    }\n\n    return result;\n  }; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n\n  var parseUserData = function parseUserData(sei) {\n    // itu_t_t35_contry_code must be 181 (United States) for\n    // captions\n    if (sei.payload[0] !== 181) {\n      return null;\n    } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n\n    if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n      return null;\n    } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n\n    if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n      return null;\n    } // finally, user_data_type_code should be 0x03 for caption data\n\n\n    if (sei.payload[7] !== 0x03) {\n      return null;\n    } // return the user_data_type_structure and strip the trailing\n    // marker bits\n\n\n    return sei.payload.subarray(8, sei.payload.length - 1);\n  }; // see CEA-708-D, section 4.4\n\n\n  var parseCaptionPackets = function parseCaptionPackets(pts, userData) {\n    var results = [],\n        i,\n        count,\n        offset,\n        data; // if this is just filler, return immediately\n\n    if (!(userData[0] & 0x40)) {\n      return results;\n    } // parse out the cc_data_1 and cc_data_2 fields\n\n\n    count = userData[0] & 0x1f;\n\n    for (i = 0; i < count; i++) {\n      offset = i * 3;\n      data = {\n        type: userData[offset + 2] & 0x03,\n        pts: pts\n      }; // capture cc data when cc_valid is 1\n\n      if (userData[offset + 2] & 0x04) {\n        data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n        results.push(data);\n      }\n    }\n\n    return results;\n  };\n\n  var discardEmulationPreventionBytes$1 = function discardEmulationPreventionBytes(data) {\n    var length = data.byteLength,\n        emulationPreventionBytesPositions = [],\n        i = 1,\n        newLength,\n        newData; // Find all `Emulation Prevention Bytes`\n\n    while (i < length - 2) {\n      if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n        emulationPreventionBytesPositions.push(i + 2);\n        i += 2;\n      } else {\n        i++;\n      }\n    } // If no Emulation Prevention Bytes were found just return the original\n    // array\n\n\n    if (emulationPreventionBytesPositions.length === 0) {\n      return data;\n    } // Create a new array to hold the NAL unit data\n\n\n    newLength = length - emulationPreventionBytesPositions.length;\n    newData = new Uint8Array(newLength);\n    var sourceIndex = 0;\n\n    for (i = 0; i < newLength; sourceIndex++, i++) {\n      if (sourceIndex === emulationPreventionBytesPositions[0]) {\n        // Skip this byte\n        sourceIndex++; // Remove this position index\n\n        emulationPreventionBytesPositions.shift();\n      }\n\n      newData[i] = data[sourceIndex];\n    }\n\n    return newData;\n  }; // exports\n\n\n  var captionPacketParser = {\n    parseSei: parseSei,\n    parseUserData: parseUserData,\n    parseCaptionPackets: parseCaptionPackets,\n    discardEmulationPreventionBytes: discardEmulationPreventionBytes$1,\n    USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n  }; // Link To Transport\n  // -----------------\n\n  var CaptionStream$1 = function CaptionStream(options) {\n    options = options || {};\n    CaptionStream.prototype.init.call(this); // parse708captions flag, default to true\n\n    this.parse708captions_ = typeof options.parse708captions === 'boolean' ? options.parse708captions : true;\n    this.captionPackets_ = [];\n    this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n    ];\n\n    if (this.parse708captions_) {\n      this.cc708Stream_ = new Cea708Stream({\n        captionServices: options.captionServices\n      }); // eslint-disable-line no-use-before-define\n    }\n\n    this.reset(); // forward data and done events from CCs to this CaptionStream\n\n    this.ccStreams_.forEach(function (cc) {\n      cc.on('data', this.trigger.bind(this, 'data'));\n      cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      cc.on('done', this.trigger.bind(this, 'done'));\n    }, this);\n\n    if (this.parse708captions_) {\n      this.cc708Stream_.on('data', this.trigger.bind(this, 'data'));\n      this.cc708Stream_.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      this.cc708Stream_.on('done', this.trigger.bind(this, 'done'));\n    }\n  };\n\n  CaptionStream$1.prototype = new stream();\n\n  CaptionStream$1.prototype.push = function (event) {\n    var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n    if (event.nalUnitType !== 'sei_rbsp') {\n      return;\n    } // parse the sei\n\n\n    sei = captionPacketParser.parseSei(event.escapedRBSP); // no payload data, skip\n\n    if (!sei.payload) {\n      return;\n    } // ignore everything but user_data_registered_itu_t_t35\n\n\n    if (sei.payloadType !== captionPacketParser.USER_DATA_REGISTERED_ITU_T_T35) {\n      return;\n    } // parse out the user data payload\n\n\n    userData = captionPacketParser.parseUserData(sei); // ignore unrecognized userData\n\n    if (!userData) {\n      return;\n    } // Sometimes, the same segment # will be downloaded twice. To stop the\n    // caption data from being processed twice, we track the latest dts we've\n    // received and ignore everything with a dts before that. However, since\n    // data for a specific dts can be split across packets on either side of\n    // a segment boundary, we need to make sure we *don't* ignore the packets\n    // from the *next* segment that have dts === this.latestDts_. By constantly\n    // tracking the number of packets received with dts === this.latestDts_, we\n    // know how many should be ignored once we start receiving duplicates.\n\n\n    if (event.dts < this.latestDts_) {\n      // We've started getting older data, so set the flag.\n      this.ignoreNextEqualDts_ = true;\n      return;\n    } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n      this.numSameDts_--;\n\n      if (!this.numSameDts_) {\n        // We've received the last duplicate packet, time to start processing again\n        this.ignoreNextEqualDts_ = false;\n      }\n\n      return;\n    } // parse out CC data packets and save them for later\n\n\n    newCaptionPackets = captionPacketParser.parseCaptionPackets(event.pts, userData);\n    this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n\n    if (this.latestDts_ !== event.dts) {\n      this.numSameDts_ = 0;\n    }\n\n    this.numSameDts_++;\n    this.latestDts_ = event.dts;\n  };\n\n  CaptionStream$1.prototype.flushCCStreams = function (flushType) {\n    this.ccStreams_.forEach(function (cc) {\n      return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n    }, this);\n  };\n\n  CaptionStream$1.prototype.flushStream = function (flushType) {\n    // make sure we actually parsed captions before proceeding\n    if (!this.captionPackets_.length) {\n      this.flushCCStreams(flushType);\n      return;\n    } // In Chrome, the Array#sort function is not stable so add a\n    // presortIndex that we can use to ensure we get a stable-sort\n\n\n    this.captionPackets_.forEach(function (elem, idx) {\n      elem.presortIndex = idx;\n    }); // sort caption byte-pairs based on their PTS values\n\n    this.captionPackets_.sort(function (a, b) {\n      if (a.pts === b.pts) {\n        return a.presortIndex - b.presortIndex;\n      }\n\n      return a.pts - b.pts;\n    });\n    this.captionPackets_.forEach(function (packet) {\n      if (packet.type < 2) {\n        // Dispatch packet to the right Cea608Stream\n        this.dispatchCea608Packet(packet);\n      } else {\n        // Dispatch packet to the Cea708Stream\n        this.dispatchCea708Packet(packet);\n      }\n    }, this);\n    this.captionPackets_.length = 0;\n    this.flushCCStreams(flushType);\n  };\n\n  CaptionStream$1.prototype.flush = function () {\n    return this.flushStream('flush');\n  }; // Only called if handling partial data\n\n\n  CaptionStream$1.prototype.partialFlush = function () {\n    return this.flushStream('partialFlush');\n  };\n\n  CaptionStream$1.prototype.reset = function () {\n    this.latestDts_ = null;\n    this.ignoreNextEqualDts_ = false;\n    this.numSameDts_ = 0;\n    this.activeCea608Channel_ = [null, null];\n    this.ccStreams_.forEach(function (ccStream) {\n      ccStream.reset();\n    });\n  }; // From the CEA-608 spec:\n\n  /*\n   * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n   * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n   * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n   * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n   * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n   * to switch to captioning or Text.\n  */\n  // With that in mind, we ignore any data between an XDS control code and a\n  // subsequent closed-captioning control code.\n\n\n  CaptionStream$1.prototype.dispatchCea608Packet = function (packet) {\n    // NOTE: packet.type is the CEA608 field\n    if (this.setsTextOrXDSActive(packet)) {\n      this.activeCea608Channel_[packet.type] = null;\n    } else if (this.setsChannel1Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 0;\n    } else if (this.setsChannel2Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 1;\n    }\n\n    if (this.activeCea608Channel_[packet.type] === null) {\n      // If we haven't received anything to set the active channel, or the\n      // packets are Text/XDS data, discard the data; we don't want jumbled\n      // captions\n      return;\n    }\n\n    this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n  };\n\n  CaptionStream$1.prototype.setsChannel1Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1000;\n  };\n\n  CaptionStream$1.prototype.setsChannel2Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1800;\n  };\n\n  CaptionStream$1.prototype.setsTextOrXDSActive = function (packet) {\n    return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n  };\n\n  CaptionStream$1.prototype.dispatchCea708Packet = function (packet) {\n    if (this.parse708captions_) {\n      this.cc708Stream_.push(packet);\n    }\n  }; // ----------------------\n  // Session to Application\n  // ----------------------\n  // This hash maps special and extended character codes to their\n  // proper Unicode equivalent. The first one-byte key is just a\n  // non-standard character code. The two-byte keys that follow are\n  // the extended CEA708 character codes, along with the preceding\n  // 0x10 extended character byte to distinguish these codes from\n  // non-extended character codes. Every CEA708 character code that\n  // is not in this object maps directly to a standard unicode\n  // character code.\n  // The transparent space and non-breaking transparent space are\n  // technically not fully supported since there is no code to\n  // make them transparent, so they have normal non-transparent\n  // stand-ins.\n  // The special closed caption (CC) character isn't a standard\n  // unicode character, so a fairly similar unicode character was\n  // chosen in it's place.\n\n\n  var CHARACTER_TRANSLATION_708 = {\n    0x7f: 0x266a,\n    // ♪\n    0x1020: 0x20,\n    // Transparent Space\n    0x1021: 0xa0,\n    // Nob-breaking Transparent Space\n    0x1025: 0x2026,\n    // …\n    0x102a: 0x0160,\n    // Š\n    0x102c: 0x0152,\n    // Œ\n    0x1030: 0x2588,\n    // █\n    0x1031: 0x2018,\n    // ‘\n    0x1032: 0x2019,\n    // ’\n    0x1033: 0x201c,\n    // “\n    0x1034: 0x201d,\n    // ”\n    0x1035: 0x2022,\n    // •\n    0x1039: 0x2122,\n    // ™\n    0x103a: 0x0161,\n    // š\n    0x103c: 0x0153,\n    // œ\n    0x103d: 0x2120,\n    // ℠\n    0x103f: 0x0178,\n    // Ÿ\n    0x1076: 0x215b,\n    // ⅛\n    0x1077: 0x215c,\n    // ⅜\n    0x1078: 0x215d,\n    // ⅝\n    0x1079: 0x215e,\n    // ⅞\n    0x107a: 0x23d0,\n    // ⏐\n    0x107b: 0x23a4,\n    // ⎤\n    0x107c: 0x23a3,\n    // ⎣\n    0x107d: 0x23af,\n    // ⎯\n    0x107e: 0x23a6,\n    // ⎦\n    0x107f: 0x23a1,\n    // ⎡\n    0x10a0: 0x3138 // ㄸ (CC char)\n\n  };\n\n  var get708CharFromCode = function get708CharFromCode(code) {\n    var newCode = CHARACTER_TRANSLATION_708[code] || code;\n\n    if (code & 0x1000 && code === newCode) {\n      // Invalid extended code\n      return '';\n    }\n\n    return String.fromCharCode(newCode);\n  };\n\n  var within708TextBlock = function within708TextBlock(b) {\n    return 0x20 <= b && b <= 0x7f || 0xa0 <= b && b <= 0xff;\n  };\n\n  var Cea708Window = function Cea708Window(windowNum) {\n    this.windowNum = windowNum;\n    this.reset();\n  };\n\n  Cea708Window.prototype.reset = function () {\n    this.clearText();\n    this.pendingNewLine = false;\n    this.winAttr = {};\n    this.penAttr = {};\n    this.penLoc = {};\n    this.penColor = {}; // These default values are arbitrary,\n    // defineWindow will usually override them\n\n    this.visible = 0;\n    this.rowLock = 0;\n    this.columnLock = 0;\n    this.priority = 0;\n    this.relativePositioning = 0;\n    this.anchorVertical = 0;\n    this.anchorHorizontal = 0;\n    this.anchorPoint = 0;\n    this.rowCount = 1;\n    this.virtualRowCount = this.rowCount + 1;\n    this.columnCount = 41;\n    this.windowStyle = 0;\n    this.penStyle = 0;\n  };\n\n  Cea708Window.prototype.getText = function () {\n    return this.rows.join('\\n');\n  };\n\n  Cea708Window.prototype.clearText = function () {\n    this.rows = [''];\n    this.rowIdx = 0;\n  };\n\n  Cea708Window.prototype.newLine = function (pts) {\n    if (this.rows.length >= this.virtualRowCount && typeof this.beforeRowOverflow === 'function') {\n      this.beforeRowOverflow(pts);\n    }\n\n    if (this.rows.length > 0) {\n      this.rows.push('');\n      this.rowIdx++;\n    } // Show all virtual rows since there's no visible scrolling\n\n\n    while (this.rows.length > this.virtualRowCount) {\n      this.rows.shift();\n      this.rowIdx--;\n    }\n  };\n\n  Cea708Window.prototype.isEmpty = function () {\n    if (this.rows.length === 0) {\n      return true;\n    } else if (this.rows.length === 1) {\n      return this.rows[0] === '';\n    }\n\n    return false;\n  };\n\n  Cea708Window.prototype.addText = function (text) {\n    this.rows[this.rowIdx] += text;\n  };\n\n  Cea708Window.prototype.backspace = function () {\n    if (!this.isEmpty()) {\n      var row = this.rows[this.rowIdx];\n      this.rows[this.rowIdx] = row.substr(0, row.length - 1);\n    }\n  };\n\n  var Cea708Service = function Cea708Service(serviceNum, encoding, stream) {\n    this.serviceNum = serviceNum;\n    this.text = '';\n    this.currentWindow = new Cea708Window(-1);\n    this.windows = [];\n    this.stream = stream; // Try to setup a TextDecoder if an `encoding` value was provided\n\n    if (typeof encoding === 'string') {\n      this.createTextDecoder(encoding);\n    }\n  };\n  /**\n   * Initialize service windows\n   * Must be run before service use\n   *\n   * @param  {Integer}  pts               PTS value\n   * @param  {Function} beforeRowOverflow Function to execute before row overflow of a window\n   */\n\n\n  Cea708Service.prototype.init = function (pts, beforeRowOverflow) {\n    this.startPts = pts;\n\n    for (var win = 0; win < 8; win++) {\n      this.windows[win] = new Cea708Window(win);\n\n      if (typeof beforeRowOverflow === 'function') {\n        this.windows[win].beforeRowOverflow = beforeRowOverflow;\n      }\n    }\n  };\n  /**\n   * Set current window of service to be affected by commands\n   *\n   * @param  {Integer} windowNum Window number\n   */\n\n\n  Cea708Service.prototype.setCurrentWindow = function (windowNum) {\n    this.currentWindow = this.windows[windowNum];\n  };\n  /**\n   * Try to create a TextDecoder if it is natively supported\n   */\n\n\n  Cea708Service.prototype.createTextDecoder = function (encoding) {\n    if (typeof TextDecoder === 'undefined') {\n      this.stream.trigger('log', {\n        level: 'warn',\n        message: 'The `encoding` option is unsupported without TextDecoder support'\n      });\n    } else {\n      try {\n        this.textDecoder_ = new TextDecoder(encoding);\n      } catch (error) {\n        this.stream.trigger('log', {\n          level: 'warn',\n          message: 'TextDecoder could not be created with ' + encoding + ' encoding. ' + error\n        });\n      }\n    }\n  };\n\n  var Cea708Stream = function Cea708Stream(options) {\n    options = options || {};\n    Cea708Stream.prototype.init.call(this);\n    var self = this;\n    var captionServices = options.captionServices || {};\n    var captionServiceEncodings = {};\n    var serviceProps; // Get service encodings from captionServices option block\n\n    Object.keys(captionServices).forEach(function (serviceName) {\n      serviceProps = captionServices[serviceName];\n\n      if (/^SERVICE/.test(serviceName)) {\n        captionServiceEncodings[serviceName] = serviceProps.encoding;\n      }\n    });\n    this.serviceEncodings = captionServiceEncodings;\n    this.current708Packet = null;\n    this.services = {};\n\n    this.push = function (packet) {\n      if (packet.type === 3) {\n        // 708 packet start\n        self.new708Packet();\n        self.add708Bytes(packet);\n      } else {\n        if (self.current708Packet === null) {\n          // This should only happen at the start of a file if there's no packet start.\n          self.new708Packet();\n        }\n\n        self.add708Bytes(packet);\n      }\n    };\n  };\n\n  Cea708Stream.prototype = new stream();\n  /**\n   * Push current 708 packet, create new 708 packet.\n   */\n\n  Cea708Stream.prototype.new708Packet = function () {\n    if (this.current708Packet !== null) {\n      this.push708Packet();\n    }\n\n    this.current708Packet = {\n      data: [],\n      ptsVals: []\n    };\n  };\n  /**\n   * Add pts and both bytes from packet into current 708 packet.\n   */\n\n\n  Cea708Stream.prototype.add708Bytes = function (packet) {\n    var data = packet.ccData;\n    var byte0 = data >>> 8;\n    var byte1 = data & 0xff; // I would just keep a list of packets instead of bytes, but it isn't clear in the spec\n    // that service blocks will always line up with byte pairs.\n\n    this.current708Packet.ptsVals.push(packet.pts);\n    this.current708Packet.data.push(byte0);\n    this.current708Packet.data.push(byte1);\n  };\n  /**\n   * Parse completed 708 packet into service blocks and push each service block.\n   */\n\n\n  Cea708Stream.prototype.push708Packet = function () {\n    var packet708 = this.current708Packet;\n    var packetData = packet708.data;\n    var serviceNum = null;\n    var blockSize = null;\n    var i = 0;\n    var b = packetData[i++];\n    packet708.seq = b >> 6;\n    packet708.sizeCode = b & 0x3f; // 0b00111111;\n\n    for (; i < packetData.length; i++) {\n      b = packetData[i++];\n      serviceNum = b >> 5;\n      blockSize = b & 0x1f; // 0b00011111\n\n      if (serviceNum === 7 && blockSize > 0) {\n        // Extended service num\n        b = packetData[i++];\n        serviceNum = b;\n      }\n\n      this.pushServiceBlock(serviceNum, i, blockSize);\n\n      if (blockSize > 0) {\n        i += blockSize - 1;\n      }\n    }\n  };\n  /**\n   * Parse service block, execute commands, read text.\n   *\n   * Note: While many of these commands serve important purposes,\n   * many others just parse out the parameters or attributes, but\n   * nothing is done with them because this is not a full and complete\n   * implementation of the entire 708 spec.\n   *\n   * @param  {Integer} serviceNum Service number\n   * @param  {Integer} start      Start index of the 708 packet data\n   * @param  {Integer} size       Block size\n   */\n\n\n  Cea708Stream.prototype.pushServiceBlock = function (serviceNum, start, size) {\n    var b;\n    var i = start;\n    var packetData = this.current708Packet.data;\n    var service = this.services[serviceNum];\n\n    if (!service) {\n      service = this.initService(serviceNum, i);\n    }\n\n    for (; i < start + size && i < packetData.length; i++) {\n      b = packetData[i];\n\n      if (within708TextBlock(b)) {\n        i = this.handleText(i, service);\n      } else if (b === 0x18) {\n        i = this.multiByteCharacter(i, service);\n      } else if (b === 0x10) {\n        i = this.extendedCommands(i, service);\n      } else if (0x80 <= b && b <= 0x87) {\n        i = this.setCurrentWindow(i, service);\n      } else if (0x98 <= b && b <= 0x9f) {\n        i = this.defineWindow(i, service);\n      } else if (b === 0x88) {\n        i = this.clearWindows(i, service);\n      } else if (b === 0x8c) {\n        i = this.deleteWindows(i, service);\n      } else if (b === 0x89) {\n        i = this.displayWindows(i, service);\n      } else if (b === 0x8a) {\n        i = this.hideWindows(i, service);\n      } else if (b === 0x8b) {\n        i = this.toggleWindows(i, service);\n      } else if (b === 0x97) {\n        i = this.setWindowAttributes(i, service);\n      } else if (b === 0x90) {\n        i = this.setPenAttributes(i, service);\n      } else if (b === 0x91) {\n        i = this.setPenColor(i, service);\n      } else if (b === 0x92) {\n        i = this.setPenLocation(i, service);\n      } else if (b === 0x8f) {\n        service = this.reset(i, service);\n      } else if (b === 0x08) {\n        // BS: Backspace\n        service.currentWindow.backspace();\n      } else if (b === 0x0c) {\n        // FF: Form feed\n        service.currentWindow.clearText();\n      } else if (b === 0x0d) {\n        // CR: Carriage return\n        service.currentWindow.pendingNewLine = true;\n      } else if (b === 0x0e) {\n        // HCR: Horizontal carriage return\n        service.currentWindow.clearText();\n      } else if (b === 0x8d) {\n        // DLY: Delay, nothing to do\n        i++;\n      } else ;\n    }\n  };\n  /**\n   * Execute an extended command\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.extendedCommands = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n\n    if (within708TextBlock(b)) {\n      i = this.handleText(i, service, {\n        isExtended: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Get PTS value of a given byte index\n   *\n   * @param  {Integer} byteIndex  Index of the byte\n   * @return {Integer}            PTS\n   */\n\n\n  Cea708Stream.prototype.getPts = function (byteIndex) {\n    // There's 1 pts value per 2 bytes\n    return this.current708Packet.ptsVals[Math.floor(byteIndex / 2)];\n  };\n  /**\n   * Initializes a service\n   *\n   * @param  {Integer} serviceNum Service number\n   * @return {Service}            Initialized service object\n   */\n\n\n  Cea708Stream.prototype.initService = function (serviceNum, i) {\n    var serviceName = 'SERVICE' + serviceNum;\n    var self = this;\n    var serviceName;\n    var encoding;\n\n    if (serviceName in this.serviceEncodings) {\n      encoding = this.serviceEncodings[serviceName];\n    }\n\n    this.services[serviceNum] = new Cea708Service(serviceNum, encoding, self);\n    this.services[serviceNum].init(this.getPts(i), function (pts) {\n      self.flushDisplayed(pts, self.services[serviceNum]);\n    });\n    return this.services[serviceNum];\n  };\n  /**\n   * Execute text writing to current window\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.handleText = function (i, service, options) {\n    var isExtended = options && options.isExtended;\n    var isMultiByte = options && options.isMultiByte;\n    var packetData = this.current708Packet.data;\n    var extended = isExtended ? 0x1000 : 0x0000;\n    var currentByte = packetData[i];\n    var nextByte = packetData[i + 1];\n    var win = service.currentWindow;\n    var char;\n    var charCodeArray; // Use the TextDecoder if one was created for this service\n\n    if (service.textDecoder_ && !isExtended) {\n      if (isMultiByte) {\n        charCodeArray = [currentByte, nextByte];\n        i++;\n      } else {\n        charCodeArray = [currentByte];\n      }\n\n      char = service.textDecoder_.decode(new Uint8Array(charCodeArray));\n    } else {\n      char = get708CharFromCode(extended | currentByte);\n    }\n\n    if (win.pendingNewLine && !win.isEmpty()) {\n      win.newLine(this.getPts(i));\n    }\n\n    win.pendingNewLine = false;\n    win.addText(char);\n    return i;\n  };\n  /**\n   * Handle decoding of multibyte character\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.multiByteCharacter = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var firstByte = packetData[i + 1];\n    var secondByte = packetData[i + 2];\n\n    if (within708TextBlock(firstByte) && within708TextBlock(secondByte)) {\n      i = this.handleText(++i, service, {\n        isMultiByte: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CW# command.\n   *\n   * Set the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setCurrentWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    return i;\n  };\n  /**\n   * Parse and execute the DF# command.\n   *\n   * Define a window and set it as the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.defineWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    var win = service.currentWindow;\n    b = packetData[++i];\n    win.visible = (b & 0x20) >> 5; // v\n\n    win.rowLock = (b & 0x10) >> 4; // rl\n\n    win.columnLock = (b & 0x08) >> 3; // cl\n\n    win.priority = b & 0x07; // p\n\n    b = packetData[++i];\n    win.relativePositioning = (b & 0x80) >> 7; // rp\n\n    win.anchorVertical = b & 0x7f; // av\n\n    b = packetData[++i];\n    win.anchorHorizontal = b; // ah\n\n    b = packetData[++i];\n    win.anchorPoint = (b & 0xf0) >> 4; // ap\n\n    win.rowCount = b & 0x0f; // rc\n\n    b = packetData[++i];\n    win.columnCount = b & 0x3f; // cc\n\n    b = packetData[++i];\n    win.windowStyle = (b & 0x38) >> 3; // ws\n\n    win.penStyle = b & 0x07; // ps\n    // The spec says there are (rowCount+1) \"virtual rows\"\n\n    win.virtualRowCount = win.rowCount + 1;\n    return i;\n  };\n  /**\n   * Parse and execute the SWA command.\n   *\n   * Set attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setWindowAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var winAttr = service.currentWindow.winAttr;\n    b = packetData[++i];\n    winAttr.fillOpacity = (b & 0xc0) >> 6; // fo\n\n    winAttr.fillRed = (b & 0x30) >> 4; // fr\n\n    winAttr.fillGreen = (b & 0x0c) >> 2; // fg\n\n    winAttr.fillBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    winAttr.borderType = (b & 0xc0) >> 6; // bt\n\n    winAttr.borderRed = (b & 0x30) >> 4; // br\n\n    winAttr.borderGreen = (b & 0x0c) >> 2; // bg\n\n    winAttr.borderBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    winAttr.borderType += (b & 0x80) >> 5; // bt\n\n    winAttr.wordWrap = (b & 0x40) >> 6; // ww\n\n    winAttr.printDirection = (b & 0x30) >> 4; // pd\n\n    winAttr.scrollDirection = (b & 0x0c) >> 2; // sd\n\n    winAttr.justify = b & 0x03; // j\n\n    b = packetData[++i];\n    winAttr.effectSpeed = (b & 0xf0) >> 4; // es\n\n    winAttr.effectDirection = (b & 0x0c) >> 2; // ed\n\n    winAttr.displayEffect = b & 0x03; // de\n\n    return i;\n  };\n  /**\n   * Gather text from all displayed windows and push a caption to output.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.flushDisplayed = function (pts, service) {\n    var displayedText = []; // TODO: Positioning not supported, displaying multiple windows will not necessarily\n    // display text in the correct order, but sample files so far have not shown any issue.\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (service.windows[winId].visible && !service.windows[winId].isEmpty()) {\n        displayedText.push(service.windows[winId].getText());\n      }\n    }\n\n    service.endPts = pts;\n    service.text = displayedText.join('\\n\\n');\n    this.pushCaption(service);\n    service.startPts = pts;\n  };\n  /**\n   * Push a caption to output if the caption contains text.\n   *\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.pushCaption = function (service) {\n    if (service.text !== '') {\n      this.trigger('data', {\n        startPts: service.startPts,\n        endPts: service.endPts,\n        text: service.text,\n        stream: 'cc708_' + service.serviceNum\n      });\n      service.text = '';\n      service.startPts = service.endPts;\n    }\n  };\n  /**\n   * Parse and execute the DSW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.displayWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the HDW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.hideWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 0;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the TGW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.toggleWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible ^= 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CLW command.\n   *\n   * Clear text of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.clearWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].clearText();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the DLW command.\n   *\n   * Re-initialize windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.deleteWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].reset();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPA command.\n   *\n   * Set pen attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penAttr = service.currentWindow.penAttr;\n    b = packetData[++i];\n    penAttr.textTag = (b & 0xf0) >> 4; // tt\n\n    penAttr.offset = (b & 0x0c) >> 2; // o\n\n    penAttr.penSize = b & 0x03; // s\n\n    b = packetData[++i];\n    penAttr.italics = (b & 0x80) >> 7; // i\n\n    penAttr.underline = (b & 0x40) >> 6; // u\n\n    penAttr.edgeType = (b & 0x38) >> 3; // et\n\n    penAttr.fontStyle = b & 0x07; // fs\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPC command.\n   *\n   * Set pen color of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenColor = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penColor = service.currentWindow.penColor;\n    b = packetData[++i];\n    penColor.fgOpacity = (b & 0xc0) >> 6; // fo\n\n    penColor.fgRed = (b & 0x30) >> 4; // fr\n\n    penColor.fgGreen = (b & 0x0c) >> 2; // fg\n\n    penColor.fgBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    penColor.bgOpacity = (b & 0xc0) >> 6; // bo\n\n    penColor.bgRed = (b & 0x30) >> 4; // br\n\n    penColor.bgGreen = (b & 0x0c) >> 2; // bg\n\n    penColor.bgBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    penColor.edgeRed = (b & 0x30) >> 4; // er\n\n    penColor.edgeGreen = (b & 0x0c) >> 2; // eg\n\n    penColor.edgeBlue = b & 0x03; // eb\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPL command.\n   *\n   * Set pen location of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenLocation = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penLoc = service.currentWindow.penLoc; // Positioning isn't really supported at the moment, so this essentially just inserts a linebreak\n\n    service.currentWindow.pendingNewLine = true;\n    b = packetData[++i];\n    penLoc.row = b & 0x0f; // r\n\n    b = packetData[++i];\n    penLoc.column = b & 0x3f; // c\n\n    return i;\n  };\n  /**\n   * Execute the RST command.\n   *\n   * Reset service to a clean slate. Re-initialize.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Service}          Re-initialized service\n   */\n\n\n  Cea708Stream.prototype.reset = function (i, service) {\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n    return this.initService(service.serviceNum, i);\n  }; // This hash maps non-ASCII, special, and extended character codes to their\n  // proper Unicode equivalent. The first keys that are only a single byte\n  // are the non-standard ASCII characters, which simply map the CEA608 byte\n  // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n  // character codes, but have their MSB bitmasked with 0x03 so that a lookup\n  // can be performed regardless of the field and data channel on which the\n  // character code was received.\n\n\n  var CHARACTER_TRANSLATION = {\n    0x2a: 0xe1,\n    // á\n    0x5c: 0xe9,\n    // é\n    0x5e: 0xed,\n    // í\n    0x5f: 0xf3,\n    // ó\n    0x60: 0xfa,\n    // ú\n    0x7b: 0xe7,\n    // ç\n    0x7c: 0xf7,\n    // ÷\n    0x7d: 0xd1,\n    // Ñ\n    0x7e: 0xf1,\n    // ñ\n    0x7f: 0x2588,\n    // █\n    0x0130: 0xae,\n    // ®\n    0x0131: 0xb0,\n    // °\n    0x0132: 0xbd,\n    // ½\n    0x0133: 0xbf,\n    // ¿\n    0x0134: 0x2122,\n    // ™\n    0x0135: 0xa2,\n    // ¢\n    0x0136: 0xa3,\n    // £\n    0x0137: 0x266a,\n    // ♪\n    0x0138: 0xe0,\n    // à\n    0x0139: 0xa0,\n    //\n    0x013a: 0xe8,\n    // è\n    0x013b: 0xe2,\n    // â\n    0x013c: 0xea,\n    // ê\n    0x013d: 0xee,\n    // î\n    0x013e: 0xf4,\n    // ô\n    0x013f: 0xfb,\n    // û\n    0x0220: 0xc1,\n    // Á\n    0x0221: 0xc9,\n    // É\n    0x0222: 0xd3,\n    // Ó\n    0x0223: 0xda,\n    // Ú\n    0x0224: 0xdc,\n    // Ü\n    0x0225: 0xfc,\n    // ü\n    0x0226: 0x2018,\n    // ‘\n    0x0227: 0xa1,\n    // ¡\n    0x0228: 0x2a,\n    // *\n    0x0229: 0x27,\n    // '\n    0x022a: 0x2014,\n    // —\n    0x022b: 0xa9,\n    // ©\n    0x022c: 0x2120,\n    // ℠\n    0x022d: 0x2022,\n    // •\n    0x022e: 0x201c,\n    // “\n    0x022f: 0x201d,\n    // ”\n    0x0230: 0xc0,\n    // À\n    0x0231: 0xc2,\n    // Â\n    0x0232: 0xc7,\n    // Ç\n    0x0233: 0xc8,\n    // È\n    0x0234: 0xca,\n    // Ê\n    0x0235: 0xcb,\n    // Ë\n    0x0236: 0xeb,\n    // ë\n    0x0237: 0xce,\n    // Î\n    0x0238: 0xcf,\n    // Ï\n    0x0239: 0xef,\n    // ï\n    0x023a: 0xd4,\n    // Ô\n    0x023b: 0xd9,\n    // Ù\n    0x023c: 0xf9,\n    // ù\n    0x023d: 0xdb,\n    // Û\n    0x023e: 0xab,\n    // «\n    0x023f: 0xbb,\n    // »\n    0x0320: 0xc3,\n    // Ã\n    0x0321: 0xe3,\n    // ã\n    0x0322: 0xcd,\n    // Í\n    0x0323: 0xcc,\n    // Ì\n    0x0324: 0xec,\n    // ì\n    0x0325: 0xd2,\n    // Ò\n    0x0326: 0xf2,\n    // ò\n    0x0327: 0xd5,\n    // Õ\n    0x0328: 0xf5,\n    // õ\n    0x0329: 0x7b,\n    // {\n    0x032a: 0x7d,\n    // }\n    0x032b: 0x5c,\n    // \\\n    0x032c: 0x5e,\n    // ^\n    0x032d: 0x5f,\n    // _\n    0x032e: 0x7c,\n    // |\n    0x032f: 0x7e,\n    // ~\n    0x0330: 0xc4,\n    // Ä\n    0x0331: 0xe4,\n    // ä\n    0x0332: 0xd6,\n    // Ö\n    0x0333: 0xf6,\n    // ö\n    0x0334: 0xdf,\n    // ß\n    0x0335: 0xa5,\n    // ¥\n    0x0336: 0xa4,\n    // ¤\n    0x0337: 0x2502,\n    // │\n    0x0338: 0xc5,\n    // Å\n    0x0339: 0xe5,\n    // å\n    0x033a: 0xd8,\n    // Ø\n    0x033b: 0xf8,\n    // ø\n    0x033c: 0x250c,\n    // ┌\n    0x033d: 0x2510,\n    // ┐\n    0x033e: 0x2514,\n    // └\n    0x033f: 0x2518 // ┘\n\n  };\n\n  var getCharFromCode = function getCharFromCode(code) {\n    if (code === null) {\n      return '';\n    }\n\n    code = CHARACTER_TRANSLATION[code] || code;\n    return String.fromCharCode(code);\n  }; // the index of the last row in a CEA-608 display buffer\n\n\n  var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n  // getting it through bit logic.\n\n  var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n  // cells. The \"bottom\" row is the last element in the outer array.\n\n  var createDisplayBuffer = function createDisplayBuffer() {\n    var result = [],\n        i = BOTTOM_ROW + 1;\n\n    while (i--) {\n      result.push('');\n    }\n\n    return result;\n  };\n\n  var Cea608Stream = function Cea608Stream(field, dataChannel) {\n    Cea608Stream.prototype.init.call(this);\n    this.field_ = field || 0;\n    this.dataChannel_ = dataChannel || 0;\n    this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n    this.setConstants();\n    this.reset();\n\n    this.push = function (packet) {\n      var data, swap, char0, char1, text; // remove the parity bits\n\n      data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n      if (data === this.lastControlCode_) {\n        this.lastControlCode_ = null;\n        return;\n      } // Store control codes\n\n\n      if ((data & 0xf000) === 0x1000) {\n        this.lastControlCode_ = data;\n      } else if (data !== this.PADDING_) {\n        this.lastControlCode_ = null;\n      }\n\n      char0 = data >>> 8;\n      char1 = data & 0xff;\n\n      if (data === this.PADDING_) {\n        return;\n      } else if (data === this.RESUME_CAPTION_LOADING_) {\n        this.mode_ = 'popOn';\n      } else if (data === this.END_OF_CAPTION_) {\n        // If an EOC is received while in paint-on mode, the displayed caption\n        // text should be swapped to non-displayed memory as if it was a pop-on\n        // caption. Because of that, we should explicitly switch back to pop-on\n        // mode\n        this.mode_ = 'popOn';\n        this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n        this.flushDisplayed(packet.pts); // flip memory\n\n        swap = this.displayed_;\n        this.displayed_ = this.nonDisplayed_;\n        this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n        this.startPts_ = packet.pts;\n      } else if (data === this.ROLL_UP_2_ROWS_) {\n        this.rollUpRows_ = 2;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_3_ROWS_) {\n        this.rollUpRows_ = 3;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_4_ROWS_) {\n        this.rollUpRows_ = 4;\n        this.setRollUp(packet.pts);\n      } else if (data === this.CARRIAGE_RETURN_) {\n        this.clearFormatting(packet.pts);\n        this.flushDisplayed(packet.pts);\n        this.shiftRowsUp_();\n        this.startPts_ = packet.pts;\n      } else if (data === this.BACKSPACE_) {\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        }\n      } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n        this.flushDisplayed(packet.pts);\n        this.displayed_ = createDisplayBuffer();\n      } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n        this.nonDisplayed_ = createDisplayBuffer();\n      } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n        if (this.mode_ !== 'paintOn') {\n          // NOTE: This should be removed when proper caption positioning is\n          // implemented\n          this.flushDisplayed(packet.pts);\n          this.displayed_ = createDisplayBuffer();\n        }\n\n        this.mode_ = 'paintOn';\n        this.startPts_ = packet.pts; // Append special characters to caption text\n      } else if (this.isSpecialCharacter(char0, char1)) {\n        // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Append extended characters to caption text\n      } else if (this.isExtCharacter(char0, char1)) {\n        // Extended characters always follow their \"non-extended\" equivalents.\n        // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n        // decoders are supposed to drop the \"è\", while compliant decoders\n        // backspace the \"e\" and insert \"è\".\n        // Delete the previous character\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        } // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n\n\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Process mid-row codes\n      } else if (this.isMidRowCode(char0, char1)) {\n        // Attributes are not additive, so clear all formatting\n        this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n        // should be replaced with spaces, so add one now\n\n        this[this.mode_](packet.pts, ' ');\n        this.column_++;\n\n        if ((char1 & 0xe) === 0xe) {\n          this.addFormatting(packet.pts, ['i']);\n        }\n\n        if ((char1 & 0x1) === 0x1) {\n          this.addFormatting(packet.pts, ['u']);\n        } // Detect offset control codes and adjust cursor\n\n      } else if (this.isOffsetControlCode(char0, char1)) {\n        // Cursor position is set by indent PAC (see below) in 4-column\n        // increments, with an additional offset code of 1-3 to reach any\n        // of the 32 columns specified by CEA-608. So all we need to do\n        // here is increment the column cursor by the given offset.\n        this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n      } else if (this.isPAC(char0, char1)) {\n        // There's no logic for PAC -> row mapping, so we have to just\n        // find the row code in an array and use its index :(\n        var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n        if (this.mode_ === 'rollUp') {\n          // This implies that the base row is incorrectly set.\n          // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n          // of roll-up rows set.\n          if (row - this.rollUpRows_ + 1 < 0) {\n            row = this.rollUpRows_ - 1;\n          }\n\n          this.setRollUp(packet.pts, row);\n        }\n\n        if (row !== this.row_) {\n          // formatting is only persistent for current row\n          this.clearFormatting(packet.pts);\n          this.row_ = row;\n        } // All PACs can apply underline, so detect and apply\n        // (All odd-numbered second bytes set underline)\n\n\n        if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n          this.addFormatting(packet.pts, ['u']);\n        }\n\n        if ((data & 0x10) === 0x10) {\n          // We've got an indent level code. Each successive even number\n          // increments the column cursor by 4, so we can get the desired\n          // column position by bit-shifting to the right (to get n/2)\n          // and multiplying by 4.\n          this.column_ = ((data & 0xe) >> 1) * 4;\n        }\n\n        if (this.isColorPAC(char1)) {\n          // it's a color code, though we only support white, which\n          // can be either normal or italicized. white italics can be\n          // either 0x4e or 0x6e depending on the row, so we just\n          // bitwise-and with 0xe to see if italics should be turned on\n          if ((char1 & 0xe) === 0xe) {\n            this.addFormatting(packet.pts, ['i']);\n          }\n        } // We have a normal character in char0, and possibly one in char1\n\n      } else if (this.isNormalChar(char0)) {\n        if (char1 === 0x00) {\n          char1 = null;\n        }\n\n        text = getCharFromCode(char0);\n        text += getCharFromCode(char1);\n        this[this.mode_](packet.pts, text);\n        this.column_ += text.length;\n      } // finish data processing\n\n    };\n  };\n\n  Cea608Stream.prototype = new stream(); // Trigger a cue point that captures the current state of the\n  // display buffer\n\n  Cea608Stream.prototype.flushDisplayed = function (pts) {\n    var content = this.displayed_ // remove spaces from the start and end of the string\n    .map(function (row, index) {\n      try {\n        return row.trim();\n      } catch (e) {\n        // Ordinarily, this shouldn't happen. However, caption\n        // parsing errors should not throw exceptions and\n        // break playback.\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping a malformed 608 caption at index ' + index + '.'\n        });\n        return '';\n      }\n    }, this) // combine all text rows to display in one cue\n    .join('\\n') // and remove blank rows from the start and end, but not the middle\n    .replace(/^\\n+|\\n+$/g, '');\n\n    if (content.length) {\n      this.trigger('data', {\n        startPts: this.startPts_,\n        endPts: pts,\n        text: content,\n        stream: this.name_\n      });\n    }\n  };\n  /**\n   * Zero out the data, used for startup and on seek\n   */\n\n\n  Cea608Stream.prototype.reset = function () {\n    this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n    // actually display captions. If a caption is shifted to a row\n    // with a lower index than this, it is cleared from the display\n    // buffer\n\n    this.topRow_ = 0;\n    this.startPts_ = 0;\n    this.displayed_ = createDisplayBuffer();\n    this.nonDisplayed_ = createDisplayBuffer();\n    this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n    this.column_ = 0;\n    this.row_ = BOTTOM_ROW;\n    this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n    this.formatting_ = [];\n  };\n  /**\n   * Sets up control code and related constants for this instance\n   */\n\n\n  Cea608Stream.prototype.setConstants = function () {\n    // The following attributes have these uses:\n    // ext_ :    char0 for mid-row codes, and the base for extended\n    //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n    //           extended codes)\n    // control_: char0 for control codes, except byte-shifted to the\n    //           left so that we can do this.control_ | CONTROL_CODE\n    // offset_:  char0 for tab offset codes\n    //\n    // It's also worth noting that control codes, and _only_ control codes,\n    // differ between field 1 and field2. Field 2 control codes are always\n    // their field 1 value plus 1. That's why there's the \"| field\" on the\n    // control value.\n    if (this.dataChannel_ === 0) {\n      this.BASE_ = 0x10;\n      this.EXT_ = 0x11;\n      this.CONTROL_ = (0x14 | this.field_) << 8;\n      this.OFFSET_ = 0x17;\n    } else if (this.dataChannel_ === 1) {\n      this.BASE_ = 0x18;\n      this.EXT_ = 0x19;\n      this.CONTROL_ = (0x1c | this.field_) << 8;\n      this.OFFSET_ = 0x1f;\n    } // Constants for the LSByte command codes recognized by Cea608Stream. This\n    // list is not exhaustive. For a more comprehensive listing and semantics see\n    // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n    // Padding\n\n\n    this.PADDING_ = 0x0000; // Pop-on Mode\n\n    this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n    this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n    this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n    this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n    this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n    this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n    this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n    this.BACKSPACE_ = this.CONTROL_ | 0x21;\n    this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n    this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n  };\n  /**\n   * Detects if the 2-byte packet data is a special character\n   *\n   * Special characters have a second byte in the range 0x30 to 0x3f,\n   * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an special character\n   */\n\n\n  Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet data is an extended character\n   *\n   * Extended characters have a second byte in the range 0x20 to 0x3f,\n   * with the first byte being 0x12 or 0x13 (for data channel 1) or\n   * 0x1a or 0x1b (for data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an extended character\n   */\n\n\n  Cea608Stream.prototype.isExtCharacter = function (char0, char1) {\n    return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet is a mid-row code\n   *\n   * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n   * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n   * channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a mid-row code\n   */\n\n\n  Cea608Stream.prototype.isMidRowCode = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n  };\n  /**\n   * Detects if the 2-byte packet is an offset control code\n   *\n   * Offset control codes have a second byte in the range 0x21 to 0x23,\n   * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an offset control code\n   */\n\n\n  Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n    return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n  };\n  /**\n   * Detects if the 2-byte packet is a Preamble Address Code\n   *\n   * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n   * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n   * range 0x40 to 0x7f.\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a PAC\n   */\n\n\n  Cea608Stream.prototype.isPAC = function (char0, char1) {\n    return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a packet's second byte is in the range of a PAC color code\n   *\n   * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n   * 0x60 to 0x6f.\n   *\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the byte is a color PAC\n   */\n\n\n  Cea608Stream.prototype.isColorPAC = function (char1) {\n    return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a single byte is in the range of a normal character\n   *\n   * Normal text bytes are in the range 0x20 to 0x7f.\n   *\n   * @param  {Integer} char  The byte\n   * @return {Boolean}       Whether the byte is a normal character\n   */\n\n\n  Cea608Stream.prototype.isNormalChar = function (char) {\n    return char >= 0x20 && char <= 0x7f;\n  };\n  /**\n   * Configures roll-up\n   *\n   * @param  {Integer} pts         Current PTS\n   * @param  {Integer} newBaseRow  Used by PACs to slide the current window to\n   *                               a new position\n   */\n\n\n  Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n    // Reset the base row to the bottom row when switching modes\n    if (this.mode_ !== 'rollUp') {\n      this.row_ = BOTTOM_ROW;\n      this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n      this.flushDisplayed(pts);\n      this.nonDisplayed_ = createDisplayBuffer();\n      this.displayed_ = createDisplayBuffer();\n    }\n\n    if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n      // move currently displayed captions (up or down) to the new base row\n      for (var i = 0; i < this.rollUpRows_; i++) {\n        this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n        this.displayed_[this.row_ - i] = '';\n      }\n    }\n\n    if (newBaseRow === undefined) {\n      newBaseRow = this.row_;\n    }\n\n    this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n  }; // Adds the opening HTML tag for the passed character to the caption text,\n  // and keeps track of it for later closing\n\n\n  Cea608Stream.prototype.addFormatting = function (pts, format) {\n    this.formatting_ = this.formatting_.concat(format);\n    var text = format.reduce(function (text, format) {\n      return text + '<' + format + '>';\n    }, '');\n    this[this.mode_](pts, text);\n  }; // Adds HTML closing tags for current formatting to caption text and\n  // clears remembered formatting\n\n\n  Cea608Stream.prototype.clearFormatting = function (pts) {\n    if (!this.formatting_.length) {\n      return;\n    }\n\n    var text = this.formatting_.reverse().reduce(function (text, format) {\n      return text + '</' + format + '>';\n    }, '');\n    this.formatting_ = [];\n    this[this.mode_](pts, text);\n  }; // Mode Implementations\n\n\n  Cea608Stream.prototype.popOn = function (pts, text) {\n    var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n    baseRow += text;\n    this.nonDisplayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.rollUp = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.shiftRowsUp_ = function () {\n    var i; // clear out inactive rows\n\n    for (i = 0; i < this.topRow_; i++) {\n      this.displayed_[i] = '';\n    }\n\n    for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n      this.displayed_[i] = '';\n    } // shift displayed rows up\n\n\n    for (i = this.topRow_; i < this.row_; i++) {\n      this.displayed_[i] = this.displayed_[i + 1];\n    } // clear out the bottom row\n\n\n    this.displayed_[this.row_] = '';\n  };\n\n  Cea608Stream.prototype.paintOn = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  }; // exports\n\n\n  var captionStream = {\n    CaptionStream: CaptionStream$1,\n    Cea608Stream: Cea608Stream,\n    Cea708Stream: Cea708Stream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var streamTypes = {\n    H264_STREAM_TYPE: 0x1B,\n    ADTS_STREAM_TYPE: 0x0F,\n    METADATA_STREAM_TYPE: 0x15\n  };\n  var MAX_TS = 8589934592;\n  var RO_THRESH = 4294967296;\n  var TYPE_SHARED = 'shared';\n\n  var handleRollover$1 = function handleRollover(value, reference) {\n    var direction = 1;\n\n    if (value > reference) {\n      // If the current timestamp value is greater than our reference timestamp and we detect a\n      // timestamp rollover, this means the roll over is happening in the opposite direction.\n      // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n      // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n      // rollover point. In loading this segment, the timestamp values will be very large,\n      // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n      // the time stamp to be `value - 2^33`.\n      direction = -1;\n    } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n    // cause an incorrect adjustment.\n\n\n    while (Math.abs(reference - value) > RO_THRESH) {\n      value += direction * MAX_TS;\n    }\n\n    return value;\n  };\n\n  var TimestampRolloverStream$1 = function TimestampRolloverStream(type) {\n    var lastDTS, referenceDTS;\n    TimestampRolloverStream.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n    // video and audio. We could use `undefined` here, but having a string\n    // makes debugging a little clearer.\n\n    this.type_ = type || TYPE_SHARED;\n\n    this.push = function (data) {\n      // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n      // streams will only accept data that matches their type.\n      if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n        return;\n      }\n\n      if (referenceDTS === undefined) {\n        referenceDTS = data.dts;\n      }\n\n      data.dts = handleRollover$1(data.dts, referenceDTS);\n      data.pts = handleRollover$1(data.pts, referenceDTS);\n      lastDTS = data.dts;\n      this.trigger('data', data);\n    };\n\n    this.flush = function () {\n      referenceDTS = lastDTS;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.discontinuity = function () {\n      referenceDTS = void 0;\n      lastDTS = void 0;\n    };\n\n    this.reset = function () {\n      this.discontinuity();\n      this.trigger('reset');\n    };\n  };\n\n  TimestampRolloverStream$1.prototype = new stream();\n  var timestampRolloverStream = {\n    TimestampRolloverStream: TimestampRolloverStream$1,\n    handleRollover: handleRollover$1\n  };\n\n  var percentEncode$1 = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as UTf-8.\n  parseUtf8 = function parseUtf8(bytes, start, end) {\n    return decodeURIComponent(percentEncode$1(bytes, start, end));\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n  parseIso88591$1 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line\n  },\n      parseSyncSafeInteger$1 = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  },\n      tagParsers = {\n    TXXX: function TXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the text fields\n          tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value\n\n          tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\\0*$/, '');\n          break;\n        }\n      }\n\n      tag.data = tag.value;\n    },\n    WXXX: function WXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.description = parseUtf8(tag.data, 1, i);\n          tag.url = parseUtf8(tag.data, i + 1, tag.data.length);\n          break;\n        }\n      }\n    },\n    PRIV: function PRIV(tag) {\n      var i;\n\n      for (i = 0; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.owner = parseIso88591$1(tag.data, 0, i);\n          break;\n        }\n      }\n\n      tag.privateData = tag.data.subarray(i + 1);\n      tag.data = tag.privateData;\n    }\n  },\n      _MetadataStream;\n\n  _MetadataStream = function MetadataStream(options) {\n    var settings = {\n      // the bytes of the program-level descriptor field in MP2T\n      // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n      // program element descriptors\"\n      descriptor: options && options.descriptor\n    },\n        // the total size in bytes of the ID3 tag being parsed\n    tagSize = 0,\n        // tag data that is not complete enough to be parsed\n    buffer = [],\n        // the total number of bytes currently in the buffer\n    bufferSize = 0,\n        i;\n\n    _MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type\n    // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n\n\n    this.dispatchType = streamTypes.METADATA_STREAM_TYPE.toString(16);\n\n    if (settings.descriptor) {\n      for (i = 0; i < settings.descriptor.length; i++) {\n        this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n      }\n    }\n\n    this.push = function (chunk) {\n      var tag, frameStart, frameSize, frame, i, frameHeader;\n\n      if (chunk.type !== 'timed-metadata') {\n        return;\n      } // if data_alignment_indicator is set in the PES header,\n      // we must have the start of a new ID3 tag. Assume anything\n      // remaining in the buffer was malformed and throw it out\n\n\n      if (chunk.dataAlignmentIndicator) {\n        bufferSize = 0;\n        buffer.length = 0;\n      } // ignore events that don't look like ID3 data\n\n\n      if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping unrecognized metadata packet'\n        });\n        return;\n      } // add this chunk to the data we've collected so far\n\n\n      buffer.push(chunk);\n      bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header\n\n      if (buffer.length === 1) {\n        // the frame size is transmitted as a 28-bit integer in the\n        // last four bytes of the ID3 header.\n        // The most significant bit of each byte is dropped and the\n        // results concatenated to recover the actual value.\n        tagSize = parseSyncSafeInteger$1(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n        // convenient for our comparisons to include it\n\n        tagSize += 10;\n      } // if the entire frame has not arrived, wait for more data\n\n\n      if (bufferSize < tagSize) {\n        return;\n      } // collect the entire frame so it can be parsed\n\n\n      tag = {\n        data: new Uint8Array(tagSize),\n        frames: [],\n        pts: buffer[0].pts,\n        dts: buffer[0].dts\n      };\n\n      for (i = 0; i < tagSize;) {\n        tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n        i += buffer[0].data.byteLength;\n        bufferSize -= buffer[0].data.byteLength;\n        buffer.shift();\n      } // find the start of the first frame and the end of the tag\n\n\n      frameStart = 10;\n\n      if (tag.data[5] & 0x40) {\n        // advance the frame start past the extended header\n        frameStart += 4; // header size field\n\n        frameStart += parseSyncSafeInteger$1(tag.data.subarray(10, 14)); // clip any padding off the end\n\n        tagSize -= parseSyncSafeInteger$1(tag.data.subarray(16, 20));\n      } // parse one or more ID3 frames\n      // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n      do {\n        // determine the number of bytes in this frame\n        frameSize = parseSyncSafeInteger$1(tag.data.subarray(frameStart + 4, frameStart + 8));\n\n        if (frameSize < 1) {\n          this.trigger('log', {\n            level: 'warn',\n            message: 'Malformed ID3 frame encountered. Skipping metadata parsing.'\n          });\n          return;\n        }\n\n        frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);\n        frame = {\n          id: frameHeader,\n          data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n        };\n        frame.key = frame.id;\n\n        if (tagParsers[frame.id]) {\n          tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start\n          // time for raw AAC data\n\n          if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n            var d = frame.data,\n                size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n            size *= 4;\n            size += d[7] & 0x03;\n            frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based\n            // on the value of this frame\n            // we couldn't have known the appropriate pts and dts before\n            // parsing this ID3 tag so set those values now\n\n            if (tag.pts === undefined && tag.dts === undefined) {\n              tag.pts = frame.timeStamp;\n              tag.dts = frame.timeStamp;\n            }\n\n            this.trigger('timestamp', frame);\n          }\n        }\n\n        tag.frames.push(frame);\n        frameStart += 10; // advance past the frame header\n\n        frameStart += frameSize; // advance past the frame body\n      } while (frameStart < tagSize);\n\n      this.trigger('data', tag);\n    };\n  };\n\n  _MetadataStream.prototype = new stream();\n  var metadataStream = _MetadataStream;\n  var TimestampRolloverStream = timestampRolloverStream.TimestampRolloverStream; // object types\n\n  var _TransportPacketStream, _TransportParseStream, _ElementaryStream; // constants\n\n\n  var MP2T_PACKET_LENGTH$1 = 188,\n      // bytes\n  SYNC_BYTE$1 = 0x47;\n  /**\n   * Splits an incoming stream of binary data into MPEG-2 Transport\n   * Stream packets.\n   */\n\n  _TransportPacketStream = function TransportPacketStream() {\n    var buffer = new Uint8Array(MP2T_PACKET_LENGTH$1),\n        bytesInBuffer = 0;\n\n    _TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.\n\n    /**\n     * Split a stream of data into M2TS packets\n    **/\n\n\n    this.push = function (bytes) {\n      var startIndex = 0,\n          endIndex = MP2T_PACKET_LENGTH$1,\n          everything; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (bytesInBuffer) {\n        everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n        everything.set(buffer.subarray(0, bytesInBuffer));\n        everything.set(bytes, bytesInBuffer);\n        bytesInBuffer = 0;\n      } else {\n        everything = bytes;\n      } // While we have enough data for a packet\n\n\n      while (endIndex < everything.byteLength) {\n        // Look for a pair of start and end sync bytes in the data..\n        if (everything[startIndex] === SYNC_BYTE$1 && everything[endIndex] === SYNC_BYTE$1) {\n          // We found a packet so emit it and jump one whole packet forward in\n          // the stream\n          this.trigger('data', everything.subarray(startIndex, endIndex));\n          startIndex += MP2T_PACKET_LENGTH$1;\n          endIndex += MP2T_PACKET_LENGTH$1;\n          continue;\n        } // If we get here, we have somehow become de-synchronized and we need to step\n        // forward one byte at a time until we find a pair of sync bytes that denote\n        // a packet\n\n\n        startIndex++;\n        endIndex++;\n      } // If there was some data left over at the end of the segment that couldn't\n      // possibly be a whole packet, keep it because it might be the start of a packet\n      // that continues in the next segment\n\n\n      if (startIndex < everything.byteLength) {\n        buffer.set(everything.subarray(startIndex), 0);\n        bytesInBuffer = everything.byteLength - startIndex;\n      }\n    };\n    /**\n     * Passes identified M2TS packets to the TransportParseStream to be parsed\n    **/\n\n\n    this.flush = function () {\n      // If the buffer contains a whole packet when we are being flushed, emit it\n      // and empty the buffer. Otherwise hold onto the data because it may be\n      // important for decoding the next segment\n      if (bytesInBuffer === MP2T_PACKET_LENGTH$1 && buffer[0] === SYNC_BYTE$1) {\n        this.trigger('data', buffer);\n        bytesInBuffer = 0;\n      }\n\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.reset = function () {\n      bytesInBuffer = 0;\n      this.trigger('reset');\n    };\n  };\n\n  _TransportPacketStream.prototype = new stream();\n  /**\n   * Accepts an MP2T TransportPacketStream and emits data events with parsed\n   * forms of the individual transport stream packets.\n   */\n\n  _TransportParseStream = function TransportParseStream() {\n    var parsePsi, parsePat, parsePmt, self;\n\n    _TransportParseStream.prototype.init.call(this);\n\n    self = this;\n    this.packetsWaitingForPmt = [];\n    this.programMapTable = undefined;\n\n    parsePsi = function parsePsi(payload, psi) {\n      var offset = 0; // PSI packets may be split into multiple sections and those\n      // sections may be split into multiple packets. If a PSI\n      // section starts in this packet, the payload_unit_start_indicator\n      // will be true and the first byte of the payload will indicate\n      // the offset from the current position to the start of the\n      // section.\n\n      if (psi.payloadUnitStartIndicator) {\n        offset += payload[offset] + 1;\n      }\n\n      if (psi.type === 'pat') {\n        parsePat(payload.subarray(offset), psi);\n      } else {\n        parsePmt(payload.subarray(offset), psi);\n      }\n    };\n\n    parsePat = function parsePat(payload, pat) {\n      pat.section_number = payload[7]; // eslint-disable-line camelcase\n\n      pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n      // skip the PSI header and parse the first PMT entry\n\n      self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n      pat.pmtPid = self.pmtPid;\n    };\n    /**\n     * Parse out the relevant fields of a Program Map Table (PMT).\n     * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n     * packet. The first byte in this array should be the table_id\n     * field.\n     * @param pmt {object} the object that should be decorated with\n     * fields parsed from the PMT.\n     */\n\n\n    parsePmt = function parsePmt(payload, pmt) {\n      var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually\n      // take effect. We don't believe this should ever be the case\n      // for HLS but we'll ignore \"forward\" PMT declarations if we see\n      // them. Future PMT declarations have the current_next_indicator\n      // set to zero.\n\n      if (!(payload[5] & 0x01)) {\n        return;\n      } // overwrite any existing program map table\n\n\n      self.programMapTable = {\n        video: null,\n        audio: null,\n        'timed-metadata': {}\n      }; // the mapping table ends at the end of the current section\n\n      sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n      tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n      // long the program info descriptors are\n\n      programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table\n\n      offset = 12 + programInfoLength;\n\n      while (offset < tableEnd) {\n        var streamType = payload[offset];\n        var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types\n        // TODO: should this be done for metadata too? for now maintain behavior of\n        //       multiple metadata streams\n\n        if (streamType === streamTypes.H264_STREAM_TYPE && self.programMapTable.video === null) {\n          self.programMapTable.video = pid;\n        } else if (streamType === streamTypes.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {\n          self.programMapTable.audio = pid;\n        } else if (streamType === streamTypes.METADATA_STREAM_TYPE) {\n          // map pid to stream type for metadata streams\n          self.programMapTable['timed-metadata'][pid] = streamType;\n        } // move to the next table entry\n        // skip past the elementary stream descriptors, if present\n\n\n        offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n      } // record the map on the packet as well\n\n\n      pmt.programMapTable = self.programMapTable;\n    };\n    /**\n     * Deliver a new MP2T packet to the next stream in the pipeline.\n     */\n\n\n    this.push = function (packet) {\n      var result = {},\n          offset = 4;\n      result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]\n\n      result.pid = packet[1] & 0x1f;\n      result.pid <<= 8;\n      result.pid |= packet[2]; // if an adaption field is present, its length is specified by the\n      // fifth byte of the TS packet header. The adaptation field is\n      // used to add stuffing to PES packets that don't fill a complete\n      // TS packet, and to specify some forms of timing and control data\n      // that we do not currently use.\n\n      if ((packet[3] & 0x30) >>> 4 > 0x01) {\n        offset += packet[offset] + 1;\n      } // parse the rest of the packet based on the type\n\n\n      if (result.pid === 0) {\n        result.type = 'pat';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result);\n      } else if (result.pid === this.pmtPid) {\n        result.type = 'pmt';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now\n\n        while (this.packetsWaitingForPmt.length) {\n          this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n        }\n      } else if (this.programMapTable === undefined) {\n        // When we have not seen a PMT yet, defer further processing of\n        // PES packets until one has been parsed\n        this.packetsWaitingForPmt.push([packet, offset, result]);\n      } else {\n        this.processPes_(packet, offset, result);\n      }\n    };\n\n    this.processPes_ = function (packet, offset, result) {\n      // set the appropriate stream type\n      if (result.pid === this.programMapTable.video) {\n        result.streamType = streamTypes.H264_STREAM_TYPE;\n      } else if (result.pid === this.programMapTable.audio) {\n        result.streamType = streamTypes.ADTS_STREAM_TYPE;\n      } else {\n        // if not video or audio, it is timed-metadata or unknown\n        // if unknown, streamType will be undefined\n        result.streamType = this.programMapTable['timed-metadata'][result.pid];\n      }\n\n      result.type = 'pes';\n      result.data = packet.subarray(offset);\n      this.trigger('data', result);\n    };\n  };\n\n  _TransportParseStream.prototype = new stream();\n  _TransportParseStream.STREAM_TYPES = {\n    h264: 0x1b,\n    adts: 0x0f\n  };\n  /**\n   * Reconsistutes program elementary stream (PES) packets from parsed\n   * transport stream packets. That is, if you pipe an\n   * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n   * events will be events which capture the bytes for individual PES\n   * packets plus relevant metadata that has been extracted from the\n   * container.\n   */\n\n  _ElementaryStream = function ElementaryStream() {\n    var self = this,\n        segmentHadPmt = false,\n        // PES packet fragments\n    video = {\n      data: [],\n      size: 0\n    },\n        audio = {\n      data: [],\n      size: 0\n    },\n        timedMetadata = {\n      data: [],\n      size: 0\n    },\n        programMapTable,\n        parsePes = function parsePes(payload, pes) {\n      var ptsDtsFlags;\n      var startPrefix = payload[0] << 16 | payload[1] << 8 | payload[2]; // default to an empty array\n\n      pes.data = new Uint8Array(); // In certain live streams, the start of a TS fragment has ts packets\n      // that are frame data that is continuing from the previous fragment. This\n      // is to check that the pes data is the start of a new pes payload\n\n      if (startPrefix !== 1) {\n        return;\n      } // get the packet length, this will be 0 for video\n\n\n      pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe\n\n      pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value\n      // and a DTS value. Determine what combination of values is\n      // available to work with.\n\n      ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n      // performs all bitwise operations on 32-bit integers but javascript\n      // supports a much greater range (52-bits) of integer using standard\n      // mathematical operations.\n      // We construct a 31-bit value using bitwise operators over the 31\n      // most significant bits and then multiply by 4 (equal to a left-shift\n      // of 2) before we add the final 2 least significant bits of the\n      // timestamp (equal to an OR.)\n\n      if (ptsDtsFlags & 0xC0) {\n        // the PTS and DTS are not written out directly. For information\n        // on how they are encoded, see\n        // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n        pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;\n        pes.pts *= 4; // Left shift by 2\n\n        pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n\n        pes.dts = pes.pts;\n\n        if (ptsDtsFlags & 0x40) {\n          pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;\n          pes.dts *= 4; // Left shift by 2\n\n          pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n        }\n      } // the data section starts immediately after the PES header.\n      // pes_header_data_length specifies the number of header bytes\n      // that follow the last byte of the field.\n\n\n      pes.data = payload.subarray(9 + payload[8]);\n    },\n\n    /**\n      * Pass completely parsed PES packets to the next stream in the pipeline\n     **/\n    flushStream = function flushStream(stream, type, forceFlush) {\n      var packetData = new Uint8Array(stream.size),\n          event = {\n        type: type\n      },\n          i = 0,\n          offset = 0,\n          packetFlushable = false,\n          fragment; // do nothing if there is not enough buffered data for a complete\n      // PES header\n\n      if (!stream.data.length || stream.size < 9) {\n        return;\n      }\n\n      event.trackId = stream.data[0].pid; // reassemble the packet\n\n      for (i = 0; i < stream.data.length; i++) {\n        fragment = stream.data[i];\n        packetData.set(fragment.data, offset);\n        offset += fragment.data.byteLength;\n      } // parse assembled packet's PES header\n\n\n      parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length\n      // check that there is enough stream data to fill the packet\n\n      packetFlushable = type === 'video' || event.packetLength <= stream.size; // flush pending packets if the conditions are right\n\n      if (forceFlush || packetFlushable) {\n        stream.size = 0;\n        stream.data.length = 0;\n      } // only emit packets that are complete. this is to avoid assembling\n      // incomplete PES packets due to poor segmentation\n\n\n      if (packetFlushable) {\n        self.trigger('data', event);\n      }\n    };\n\n    _ElementaryStream.prototype.init.call(this);\n    /**\n     * Identifies M2TS packet types and parses PES packets using metadata\n     * parsed from the PMT\n     **/\n\n\n    this.push = function (data) {\n      ({\n        pat: function pat() {// we have to wait for the PMT to arrive as well before we\n          // have any meaningful metadata\n        },\n        pes: function pes() {\n          var stream, streamType;\n\n          switch (data.streamType) {\n            case streamTypes.H264_STREAM_TYPE:\n              stream = video;\n              streamType = 'video';\n              break;\n\n            case streamTypes.ADTS_STREAM_TYPE:\n              stream = audio;\n              streamType = 'audio';\n              break;\n\n            case streamTypes.METADATA_STREAM_TYPE:\n              stream = timedMetadata;\n              streamType = 'timed-metadata';\n              break;\n\n            default:\n              // ignore unknown stream types\n              return;\n          } // if a new packet is starting, we can flush the completed\n          // packet\n\n\n          if (data.payloadUnitStartIndicator) {\n            flushStream(stream, streamType, true);\n          } // buffer this fragment until we are sure we've received the\n          // complete payload\n\n\n          stream.data.push(data);\n          stream.size += data.data.byteLength;\n        },\n        pmt: function pmt() {\n          var event = {\n            type: 'metadata',\n            tracks: []\n          };\n          programMapTable = data.programMapTable; // translate audio and video streams to tracks\n\n          if (programMapTable.video !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.video,\n              codec: 'avc',\n              type: 'video'\n            });\n          }\n\n          if (programMapTable.audio !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.audio,\n              codec: 'adts',\n              type: 'audio'\n            });\n          }\n\n          segmentHadPmt = true;\n          self.trigger('data', event);\n        }\n      })[data.type]();\n    };\n\n    this.reset = function () {\n      video.size = 0;\n      video.data.length = 0;\n      audio.size = 0;\n      audio.data.length = 0;\n      this.trigger('reset');\n    };\n    /**\n     * Flush any remaining input. Video PES packets may be of variable\n     * length. Normally, the start of a new video packet can trigger the\n     * finalization of the previous packet. That is not possible if no\n     * more video is forthcoming, however. In that case, some other\n     * mechanism (like the end of the file) has to be employed. When it is\n     * clear that no additional data is forthcoming, calling this method\n     * will flush the buffered packets.\n     */\n\n\n    this.flushStreams_ = function () {\n      // !!THIS ORDER IS IMPORTANT!!\n      // video first then audio\n      flushStream(video, 'video');\n      flushStream(audio, 'audio');\n      flushStream(timedMetadata, 'timed-metadata');\n    };\n\n    this.flush = function () {\n      // if on flush we haven't had a pmt emitted\n      // and we have a pmt to emit. emit the pmt\n      // so that we trigger a trackinfo downstream.\n      if (!segmentHadPmt && programMapTable) {\n        var pmt = {\n          type: 'metadata',\n          tracks: []\n        }; // translate audio and video streams to tracks\n\n        if (programMapTable.video !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.video,\n            codec: 'avc',\n            type: 'video'\n          });\n        }\n\n        if (programMapTable.audio !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.audio,\n            codec: 'adts',\n            type: 'audio'\n          });\n        }\n\n        self.trigger('data', pmt);\n      }\n\n      segmentHadPmt = false;\n      this.flushStreams_();\n      this.trigger('done');\n    };\n  };\n\n  _ElementaryStream.prototype = new stream();\n  var m2ts = {\n    PAT_PID: 0x0000,\n    MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH$1,\n    TransportPacketStream: _TransportPacketStream,\n    TransportParseStream: _TransportParseStream,\n    ElementaryStream: _ElementaryStream,\n    TimestampRolloverStream: TimestampRolloverStream,\n    CaptionStream: captionStream.CaptionStream,\n    Cea608Stream: captionStream.Cea608Stream,\n    Cea708Stream: captionStream.Cea708Stream,\n    MetadataStream: metadataStream\n  };\n\n  for (var type in streamTypes) {\n    if (streamTypes.hasOwnProperty(type)) {\n      m2ts[type] = streamTypes[type];\n    }\n  }\n\n  var m2ts_1 = m2ts;\n  var ONE_SECOND_IN_TS$2 = clock.ONE_SECOND_IN_TS;\n\n  var _AdtsStream;\n\n  var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n  /*\n   * Accepts a ElementaryStream and emits data events with parsed\n   * AAC Audio Frames of the individual packets. Input audio in ADTS\n   * format is unpacked and re-emitted as AAC frames.\n   *\n   * @see http://wiki.multimedia.cx/index.php?title=ADTS\n   * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n   */\n\n  _AdtsStream = function AdtsStream(handlePartialSegments) {\n    var buffer,\n        frameNum = 0;\n\n    _AdtsStream.prototype.init.call(this);\n\n    this.skipWarn_ = function (start, end) {\n      this.trigger('log', {\n        level: 'warn',\n        message: \"adts skiping bytes \" + start + \" to \" + end + \" in frame \" + frameNum + \" outside syncword\"\n      });\n    };\n\n    this.push = function (packet) {\n      var i = 0,\n          frameLength,\n          protectionSkipBytes,\n          oldBuffer,\n          sampleCount,\n          adtsFrameDuration;\n\n      if (!handlePartialSegments) {\n        frameNum = 0;\n      }\n\n      if (packet.type !== 'audio') {\n        // ignore non-audio data\n        return;\n      } // Prepend any data in the buffer to the input data so that we can parse\n      // aac frames the cross a PES packet boundary\n\n\n      if (buffer && buffer.length) {\n        oldBuffer = buffer;\n        buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n        buffer.set(oldBuffer);\n        buffer.set(packet.data, oldBuffer.byteLength);\n      } else {\n        buffer = packet.data;\n      } // unpack any ADTS frames which have been fully received\n      // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n\n\n      var skip; // We use i + 7 here because we want to be able to parse the entire header.\n      // If we don't have enough bytes to do that, then we definitely won't have a full frame.\n\n      while (i + 7 < buffer.length) {\n        // Look for the start of an ADTS header..\n        if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n          if (typeof skip !== 'number') {\n            skip = i;\n          } // If a valid header was not found,  jump one forward and attempt to\n          // find a valid ADTS header starting at the next byte\n\n\n          i++;\n          continue;\n        }\n\n        if (typeof skip === 'number') {\n          this.skipWarn_(skip, i);\n          skip = null;\n        } // The protection skip bit tells us if we have 2 bytes of CRC data at the\n        // end of the ADTS header\n\n\n        protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the\n        // end of the sync sequence\n        // NOTE: frame length includes the size of the header\n\n        frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;\n        sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n        adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,\n        // then we have to wait for more data\n\n        if (buffer.byteLength - i < frameLength) {\n          break;\n        } // Otherwise, deliver the complete AAC frame\n\n\n        this.trigger('data', {\n          pts: packet.pts + frameNum * adtsFrameDuration,\n          dts: packet.dts + frameNum * adtsFrameDuration,\n          sampleCount: sampleCount,\n          audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,\n          channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,\n          samplerate: ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2],\n          samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n          // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n          samplesize: 16,\n          // data is the frame without it's header\n          data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)\n        });\n        frameNum++;\n        i += frameLength;\n      }\n\n      if (typeof skip === 'number') {\n        this.skipWarn_(skip, i);\n        skip = null;\n      } // remove processed bytes from the buffer.\n\n\n      buffer = buffer.subarray(i);\n    };\n\n    this.flush = function () {\n      frameNum = 0;\n      this.trigger('done');\n    };\n\n    this.reset = function () {\n      buffer = void 0;\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      buffer = void 0;\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AdtsStream.prototype = new stream();\n  var adts = _AdtsStream;\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ExpGolomb;\n  /**\n   * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n   * scheme used by h264.\n   */\n\n  ExpGolomb = function ExpGolomb(workingData) {\n    var // the number of bytes left to examine in workingData\n    workingBytesAvailable = workingData.byteLength,\n        // the current word being examined\n    workingWord = 0,\n        // :uint\n    // the number of bits left to examine in the current word\n    workingBitsAvailable = 0; // :uint;\n    // ():uint\n\n    this.length = function () {\n      return 8 * workingBytesAvailable;\n    }; // ():uint\n\n\n    this.bitsAvailable = function () {\n      return 8 * workingBytesAvailable + workingBitsAvailable;\n    }; // ():void\n\n\n    this.loadWord = function () {\n      var position = workingData.byteLength - workingBytesAvailable,\n          workingBytes = new Uint8Array(4),\n          availableBytes = Math.min(4, workingBytesAvailable);\n\n      if (availableBytes === 0) {\n        throw new Error('no bytes available');\n      }\n\n      workingBytes.set(workingData.subarray(position, position + availableBytes));\n      workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed\n\n      workingBitsAvailable = availableBytes * 8;\n      workingBytesAvailable -= availableBytes;\n    }; // (count:int):void\n\n\n    this.skipBits = function (count) {\n      var skipBytes; // :int\n\n      if (workingBitsAvailable > count) {\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      } else {\n        count -= workingBitsAvailable;\n        skipBytes = Math.floor(count / 8);\n        count -= skipBytes * 8;\n        workingBytesAvailable -= skipBytes;\n        this.loadWord();\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      }\n    }; // (size:int):uint\n\n\n    this.readBits = function (size) {\n      var bits = Math.min(workingBitsAvailable, size),\n          // :uint\n      valu = workingWord >>> 32 - bits; // :uint\n      // if size > 31, handle error\n\n      workingBitsAvailable -= bits;\n\n      if (workingBitsAvailable > 0) {\n        workingWord <<= bits;\n      } else if (workingBytesAvailable > 0) {\n        this.loadWord();\n      }\n\n      bits = size - bits;\n\n      if (bits > 0) {\n        return valu << bits | this.readBits(bits);\n      }\n\n      return valu;\n    }; // ():uint\n\n\n    this.skipLeadingZeros = function () {\n      var leadingZeroCount; // :uint\n\n      for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n        if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {\n          // the first bit of working word is 1\n          workingWord <<= leadingZeroCount;\n          workingBitsAvailable -= leadingZeroCount;\n          return leadingZeroCount;\n        }\n      } // we exhausted workingWord and still have not found a 1\n\n\n      this.loadWord();\n      return leadingZeroCount + this.skipLeadingZeros();\n    }; // ():void\n\n\n    this.skipUnsignedExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():void\n\n\n    this.skipExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():uint\n\n\n    this.readUnsignedExpGolomb = function () {\n      var clz = this.skipLeadingZeros(); // :uint\n\n      return this.readBits(clz + 1) - 1;\n    }; // ():int\n\n\n    this.readExpGolomb = function () {\n      var valu = this.readUnsignedExpGolomb(); // :int\n\n      if (0x01 & valu) {\n        // the number is odd if the low order bit is set\n        return 1 + valu >>> 1; // add 1 to make it even, and divide by 2\n      }\n\n      return -1 * (valu >>> 1); // divide by two then make it negative\n    }; // Some convenience functions\n    // :Boolean\n\n\n    this.readBoolean = function () {\n      return this.readBits(1) === 1;\n    }; // ():int\n\n\n    this.readUnsignedByte = function () {\n      return this.readBits(8);\n    };\n\n    this.loadWord();\n  };\n\n  var expGolomb = ExpGolomb;\n\n  var _H264Stream, _NalByteStream;\n\n  var PROFILES_WITH_OPTIONAL_SPS_DATA;\n  /**\n   * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n   */\n\n  _NalByteStream = function NalByteStream() {\n    var syncPoint = 0,\n        i,\n        buffer;\n\n    _NalByteStream.prototype.init.call(this);\n    /*\n     * Scans a byte stream and triggers a data event with the NAL units found.\n     * @param {Object} data Event received from H264Stream\n     * @param {Uint8Array} data.data The h264 byte stream to be scanned\n     *\n     * @see H264Stream.push\n     */\n\n\n    this.push = function (data) {\n      var swapBuffer;\n\n      if (!buffer) {\n        buffer = data.data;\n      } else {\n        swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n        swapBuffer.set(buffer);\n        swapBuffer.set(data.data, buffer.byteLength);\n        buffer = swapBuffer;\n      }\n\n      var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B\n      // scan for NAL unit boundaries\n      // a match looks like this:\n      // 0 0 1 .. NAL .. 0 0 1\n      // ^ sync point        ^ i\n      // or this:\n      // 0 0 1 .. NAL .. 0 0 0\n      // ^ sync point        ^ i\n      // advance the sync point to a NAL start, if necessary\n\n      for (; syncPoint < len - 3; syncPoint++) {\n        if (buffer[syncPoint + 2] === 1) {\n          // the sync point is properly aligned\n          i = syncPoint + 5;\n          break;\n        }\n      }\n\n      while (i < len) {\n        // look at the current byte to determine if we've hit the end of\n        // a NAL unit boundary\n        switch (buffer[i]) {\n          case 0:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0) {\n              i += 2;\n              break;\n            } else if (buffer[i - 2] !== 0) {\n              i++;\n              break;\n            } // deliver the NAL unit if it isn't empty\n\n\n            if (syncPoint + 3 !== i - 2) {\n              this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            } // drop trailing zeroes\n\n\n            do {\n              i++;\n            } while (buffer[i] !== 1 && i < len);\n\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          case 1:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {\n              i += 3;\n              break;\n            } // deliver the NAL unit\n\n\n            this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          default:\n            // the current byte isn't a one or zero, so it cannot be part\n            // of a sync sequence\n            i += 3;\n            break;\n        }\n      } // filter out the NAL units that were delivered\n\n\n      buffer = buffer.subarray(syncPoint);\n      i -= syncPoint;\n      syncPoint = 0;\n    };\n\n    this.reset = function () {\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('reset');\n    };\n\n    this.flush = function () {\n      // deliver the last buffered NAL unit\n      if (buffer && buffer.byteLength > 3) {\n        this.trigger('data', buffer.subarray(syncPoint + 3));\n      } // reset the stream state\n\n\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _NalByteStream.prototype = new stream(); // values of profile_idc that indicate additional fields are included in the SPS\n  // see Recommendation ITU-T H.264 (4/2013),\n  // 7.3.2.1.1 Sequence parameter set data syntax\n\n  PROFILES_WITH_OPTIONAL_SPS_DATA = {\n    100: true,\n    110: true,\n    122: true,\n    244: true,\n    44: true,\n    83: true,\n    86: true,\n    118: true,\n    128: true,\n    // TODO: the three profiles below don't\n    // appear to have sps data in the specificiation anymore?\n    138: true,\n    139: true,\n    134: true\n  };\n  /**\n   * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n   * events.\n   */\n\n  _H264Stream = function H264Stream() {\n    var nalByteStream = new _NalByteStream(),\n        self,\n        trackId,\n        currentPts,\n        currentDts,\n        discardEmulationPreventionBytes,\n        readSequenceParameterSet,\n        skipScalingList;\n\n    _H264Stream.prototype.init.call(this);\n\n    self = this;\n    /*\n     * Pushes a packet from a stream onto the NalByteStream\n     *\n     * @param {Object} packet - A packet received from a stream\n     * @param {Uint8Array} packet.data - The raw bytes of the packet\n     * @param {Number} packet.dts - Decode timestamp of the packet\n     * @param {Number} packet.pts - Presentation timestamp of the packet\n     * @param {Number} packet.trackId - The id of the h264 track this packet came from\n     * @param {('video'|'audio')} packet.type - The type of packet\n     *\n     */\n\n    this.push = function (packet) {\n      if (packet.type !== 'video') {\n        return;\n      }\n\n      trackId = packet.trackId;\n      currentPts = packet.pts;\n      currentDts = packet.dts;\n      nalByteStream.push(packet);\n    };\n    /*\n     * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps\n     * for the NALUs to the next stream component.\n     * Also, preprocess caption and sequence parameter NALUs.\n     *\n     * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`\n     * @see NalByteStream.push\n     */\n\n\n    nalByteStream.on('data', function (data) {\n      var event = {\n        trackId: trackId,\n        pts: currentPts,\n        dts: currentDts,\n        data: data,\n        nalUnitTypeCode: data[0] & 0x1f\n      };\n\n      switch (event.nalUnitTypeCode) {\n        case 0x05:\n          event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n          break;\n\n        case 0x06:\n          event.nalUnitType = 'sei_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          break;\n\n        case 0x07:\n          event.nalUnitType = 'seq_parameter_set_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          event.config = readSequenceParameterSet(event.escapedRBSP);\n          break;\n\n        case 0x08:\n          event.nalUnitType = 'pic_parameter_set_rbsp';\n          break;\n\n        case 0x09:\n          event.nalUnitType = 'access_unit_delimiter_rbsp';\n          break;\n      } // This triggers data on the H264Stream\n\n\n      self.trigger('data', event);\n    });\n    nalByteStream.on('done', function () {\n      self.trigger('done');\n    });\n    nalByteStream.on('partialdone', function () {\n      self.trigger('partialdone');\n    });\n    nalByteStream.on('reset', function () {\n      self.trigger('reset');\n    });\n    nalByteStream.on('endedtimeline', function () {\n      self.trigger('endedtimeline');\n    });\n\n    this.flush = function () {\n      nalByteStream.flush();\n    };\n\n    this.partialFlush = function () {\n      nalByteStream.partialFlush();\n    };\n\n    this.reset = function () {\n      nalByteStream.reset();\n    };\n\n    this.endTimeline = function () {\n      nalByteStream.endTimeline();\n    };\n    /**\n     * Advance the ExpGolomb decoder past a scaling list. The scaling\n     * list is optionally transmitted as part of a sequence parameter\n     * set and is not relevant to transmuxing.\n     * @param count {number} the number of entries in this scaling list\n     * @param expGolombDecoder {object} an ExpGolomb pointed to the\n     * start of a scaling list\n     * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n     */\n\n\n    skipScalingList = function skipScalingList(count, expGolombDecoder) {\n      var lastScale = 8,\n          nextScale = 8,\n          j,\n          deltaScale;\n\n      for (j = 0; j < count; j++) {\n        if (nextScale !== 0) {\n          deltaScale = expGolombDecoder.readExpGolomb();\n          nextScale = (lastScale + deltaScale + 256) % 256;\n        }\n\n        lastScale = nextScale === 0 ? lastScale : nextScale;\n      }\n    };\n    /**\n     * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n     * Sequence Payload\"\n     * @param data {Uint8Array} the bytes of a RBSP from a NAL\n     * unit\n     * @return {Uint8Array} the RBSP without any Emulation\n     * Prevention Bytes\n     */\n\n\n    discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n      var length = data.byteLength,\n          emulationPreventionBytesPositions = [],\n          i = 1,\n          newLength,\n          newData; // Find all `Emulation Prevention Bytes`\n\n      while (i < length - 2) {\n        if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n          emulationPreventionBytesPositions.push(i + 2);\n          i += 2;\n        } else {\n          i++;\n        }\n      } // If no Emulation Prevention Bytes were found just return the original\n      // array\n\n\n      if (emulationPreventionBytesPositions.length === 0) {\n        return data;\n      } // Create a new array to hold the NAL unit data\n\n\n      newLength = length - emulationPreventionBytesPositions.length;\n      newData = new Uint8Array(newLength);\n      var sourceIndex = 0;\n\n      for (i = 0; i < newLength; sourceIndex++, i++) {\n        if (sourceIndex === emulationPreventionBytesPositions[0]) {\n          // Skip this byte\n          sourceIndex++; // Remove this position index\n\n          emulationPreventionBytesPositions.shift();\n        }\n\n        newData[i] = data[sourceIndex];\n      }\n\n      return newData;\n    };\n    /**\n     * Read a sequence parameter set and return some interesting video\n     * properties. A sequence parameter set is the H264 metadata that\n     * describes the properties of upcoming video frames.\n     * @param data {Uint8Array} the bytes of a sequence parameter set\n     * @return {object} an object with configuration parsed from the\n     * sequence parameter set, including the dimensions of the\n     * associated video frames.\n     */\n\n\n    readSequenceParameterSet = function readSequenceParameterSet(data) {\n      var frameCropLeftOffset = 0,\n          frameCropRightOffset = 0,\n          frameCropTopOffset = 0,\n          frameCropBottomOffset = 0,\n          expGolombDecoder,\n          profileIdc,\n          levelIdc,\n          profileCompatibility,\n          chromaFormatIdc,\n          picOrderCntType,\n          numRefFramesInPicOrderCntCycle,\n          picWidthInMbsMinus1,\n          picHeightInMapUnitsMinus1,\n          frameMbsOnlyFlag,\n          scalingListCount,\n          sarRatio = [1, 1],\n          aspectRatioIdc,\n          i;\n      expGolombDecoder = new expGolomb(data);\n      profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n\n      profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n\n      levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n      // some profiles have more optional data we don't need\n\n      if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n        chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n\n        if (chromaFormatIdc === 3) {\n          expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n        }\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n\n        expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n\n        if (expGolombDecoder.readBoolean()) {\n          // seq_scaling_matrix_present_flag\n          scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;\n\n          for (i = 0; i < scalingListCount; i++) {\n            if (expGolombDecoder.readBoolean()) {\n              // seq_scaling_list_present_flag[ i ]\n              if (i < 6) {\n                skipScalingList(16, expGolombDecoder);\n              } else {\n                skipScalingList(64, expGolombDecoder);\n              }\n            }\n          }\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n\n      picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n\n      if (picOrderCntType === 0) {\n        expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n      } else if (picOrderCntType === 1) {\n        expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n\n        numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n\n        for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n          expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n\n      expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n      picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n\n      if (frameMbsOnlyFlag === 0) {\n        expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n      }\n\n      expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n\n      if (expGolombDecoder.readBoolean()) {\n        // frame_cropping_flag\n        frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n      }\n\n      if (expGolombDecoder.readBoolean()) {\n        // vui_parameters_present_flag\n        if (expGolombDecoder.readBoolean()) {\n          // aspect_ratio_info_present_flag\n          aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n\n          switch (aspectRatioIdc) {\n            case 1:\n              sarRatio = [1, 1];\n              break;\n\n            case 2:\n              sarRatio = [12, 11];\n              break;\n\n            case 3:\n              sarRatio = [10, 11];\n              break;\n\n            case 4:\n              sarRatio = [16, 11];\n              break;\n\n            case 5:\n              sarRatio = [40, 33];\n              break;\n\n            case 6:\n              sarRatio = [24, 11];\n              break;\n\n            case 7:\n              sarRatio = [20, 11];\n              break;\n\n            case 8:\n              sarRatio = [32, 11];\n              break;\n\n            case 9:\n              sarRatio = [80, 33];\n              break;\n\n            case 10:\n              sarRatio = [18, 11];\n              break;\n\n            case 11:\n              sarRatio = [15, 11];\n              break;\n\n            case 12:\n              sarRatio = [64, 33];\n              break;\n\n            case 13:\n              sarRatio = [160, 99];\n              break;\n\n            case 14:\n              sarRatio = [4, 3];\n              break;\n\n            case 15:\n              sarRatio = [3, 2];\n              break;\n\n            case 16:\n              sarRatio = [2, 1];\n              break;\n\n            case 255:\n              {\n                sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];\n                break;\n              }\n          }\n\n          if (sarRatio) {\n            sarRatio[0] / sarRatio[1];\n          }\n        }\n      }\n\n      return {\n        profileIdc: profileIdc,\n        levelIdc: levelIdc,\n        profileCompatibility: profileCompatibility,\n        width: (picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2,\n        height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,\n        // sar is sample aspect ratio\n        sarRatio: sarRatio\n      };\n    };\n  };\n\n  _H264Stream.prototype = new stream();\n  var h264 = {\n    H264Stream: _H264Stream,\n    NalByteStream: _NalByteStream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Utilities to detect basic properties and metadata about Aac data.\n   */\n\n  var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n\n  var parseId3TagSize = function parseId3TagSize(header, byteIndex) {\n    var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n        flags = header[byteIndex + 5],\n        footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0\n\n    returnSize = returnSize >= 0 ? returnSize : 0;\n\n    if (footerPresent) {\n      return returnSize + 20;\n    }\n\n    return returnSize + 10;\n  };\n\n  var getId3Offset = function getId3Offset(data, offset) {\n    if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {\n      return offset;\n    }\n\n    offset += parseId3TagSize(data, offset);\n    return getId3Offset(data, offset);\n  }; // TODO: use vhs-utils\n\n\n  var isLikelyAacData$1 = function isLikelyAacData(data) {\n    var offset = getId3Offset(data, 0);\n    return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 && // verify that the 2 layer bits are 0, aka this\n    // is not mp3 data but aac data.\n    (data[offset + 1] & 0x16) === 0x10;\n  };\n\n  var parseSyncSafeInteger = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  }; // return a percent-encoded representation of the specified byte range\n  // @see http://en.wikipedia.org/wiki/Percent-encoding\n\n\n  var percentEncode = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  }; // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n\n\n  var parseIso88591 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n  };\n\n  var parseAdtsSize = function parseAdtsSize(header, byteIndex) {\n    var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n        middle = header[byteIndex + 4] << 3,\n        highTwo = header[byteIndex + 3] & 0x3 << 11;\n    return highTwo | middle | lowThree;\n  };\n\n  var parseType$2 = function parseType(header, byteIndex) {\n    if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n      return 'timed-metadata';\n    } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n      return 'audio';\n    }\n\n    return null;\n  };\n\n  var parseSampleRate = function parseSampleRate(packet) {\n    var i = 0;\n\n    while (i + 5 < packet.length) {\n      if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n        // If a valid header was not found,  jump one forward and attempt to\n        // find a valid ADTS header starting at the next byte\n        i++;\n        continue;\n      }\n\n      return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n    }\n\n    return null;\n  };\n\n  var parseAacTimestamp = function parseAacTimestamp(packet) {\n    var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n    frameStart = 10;\n\n    if (packet[5] & 0x40) {\n      // advance the frame start past the extended header\n      frameStart += 4; // header size field\n\n      frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n    } // parse one or more ID3 frames\n    // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n    do {\n      // determine the number of bytes in this frame\n      frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n\n      if (frameSize < 1) {\n        return null;\n      }\n\n      frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n\n      if (frameHeader === 'PRIV') {\n        frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n        for (var i = 0; i < frame.byteLength; i++) {\n          if (frame[i] === 0) {\n            var owner = parseIso88591(frame, 0, i);\n\n            if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n              var d = frame.subarray(i + 1);\n              var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n              size *= 4;\n              size += d[7] & 0x03;\n              return size;\n            }\n\n            break;\n          }\n        }\n      }\n\n      frameStart += 10; // advance past the frame header\n\n      frameStart += frameSize; // advance past the frame body\n    } while (frameStart < packet.byteLength);\n\n    return null;\n  };\n\n  var utils = {\n    isLikelyAacData: isLikelyAacData$1,\n    parseId3TagSize: parseId3TagSize,\n    parseAdtsSize: parseAdtsSize,\n    parseType: parseType$2,\n    parseSampleRate: parseSampleRate,\n    parseAacTimestamp: parseAacTimestamp\n  };\n\n  var _AacStream;\n  /**\n   * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n   */\n\n\n  _AacStream = function AacStream() {\n    var everything = new Uint8Array(),\n        timeStamp = 0;\n\n    _AacStream.prototype.init.call(this);\n\n    this.setTimestamp = function (timestamp) {\n      timeStamp = timestamp;\n    };\n\n    this.push = function (bytes) {\n      var frameSize = 0,\n          byteIndex = 0,\n          bytesLeft,\n          chunk,\n          packet,\n          tempLength; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (everything.length) {\n        tempLength = everything.length;\n        everything = new Uint8Array(bytes.byteLength + tempLength);\n        everything.set(everything.subarray(0, tempLength));\n        everything.set(bytes, tempLength);\n      } else {\n        everything = bytes;\n      }\n\n      while (everything.length - byteIndex >= 3) {\n        if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (everything.length - byteIndex < 10) {\n            break;\n          } // check framesize\n\n\n          frameSize = utils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n          // Add to byteIndex to support multiple ID3 tags in sequence\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          chunk = {\n            type: 'timed-metadata',\n            data: everything.subarray(byteIndex, byteIndex + frameSize)\n          };\n          this.trigger('data', chunk);\n          byteIndex += frameSize;\n          continue;\n        } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (everything.length - byteIndex < 7) {\n            break;\n          }\n\n          frameSize = utils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          packet = {\n            type: 'audio',\n            data: everything.subarray(byteIndex, byteIndex + frameSize),\n            pts: timeStamp,\n            dts: timeStamp\n          };\n          this.trigger('data', packet);\n          byteIndex += frameSize;\n          continue;\n        }\n\n        byteIndex++;\n      }\n\n      bytesLeft = everything.length - byteIndex;\n\n      if (bytesLeft > 0) {\n        everything = everything.subarray(byteIndex);\n      } else {\n        everything = new Uint8Array();\n      }\n    };\n\n    this.reset = function () {\n      everything = new Uint8Array();\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      everything = new Uint8Array();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AacStream.prototype = new stream();\n  var aac = _AacStream; // constants\n\n  var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];\n  var audioProperties = AUDIO_PROPERTIES;\n  var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];\n  var videoProperties = VIDEO_PROPERTIES;\n  var H264Stream = h264.H264Stream;\n  var isLikelyAacData = utils.isLikelyAacData;\n  var ONE_SECOND_IN_TS$1 = clock.ONE_SECOND_IN_TS; // object types\n\n  var _VideoSegmentStream, _AudioSegmentStream, _Transmuxer, _CoalesceStream;\n\n  var retriggerForStream = function retriggerForStream(key, event) {\n    event.stream = key;\n    this.trigger('log', event);\n  };\n\n  var addPipelineLogRetriggers = function addPipelineLogRetriggers(transmuxer, pipeline) {\n    var keys = Object.keys(pipeline);\n\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i]; // skip non-stream keys and headOfPipeline\n      // which is just a duplicate\n\n      if (key === 'headOfPipeline' || !pipeline[key].on) {\n        continue;\n      }\n\n      pipeline[key].on('log', retriggerForStream.bind(transmuxer, key));\n    }\n  };\n  /**\n   * Compare two arrays (even typed) for same-ness\n   */\n\n\n  var arrayEquals = function arrayEquals(a, b) {\n    var i;\n\n    if (a.length !== b.length) {\n      return false;\n    } // compare the value of each element in the array\n\n\n    for (i = 0; i < a.length; i++) {\n      if (a[i] !== b[i]) {\n        return false;\n      }\n    }\n\n    return true;\n  };\n\n  var generateSegmentTimingInfo = function generateSegmentTimingInfo(baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {\n    var ptsOffsetFromDts = startPts - startDts,\n        decodeDuration = endDts - startDts,\n        presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,\n    // however, the player time values will reflect a start from the baseMediaDecodeTime.\n    // In order to provide relevant values for the player times, base timing info on the\n    // baseMediaDecodeTime and the DTS and PTS durations of the segment.\n\n    return {\n      start: {\n        dts: baseMediaDecodeTime,\n        pts: baseMediaDecodeTime + ptsOffsetFromDts\n      },\n      end: {\n        dts: baseMediaDecodeTime + decodeDuration,\n        pts: baseMediaDecodeTime + presentationDuration\n      },\n      prependedContentDuration: prependedContentDuration,\n      baseMediaDecodeTime: baseMediaDecodeTime\n    };\n  };\n  /**\n   * Constructs a single-track, ISO BMFF media segment from AAC data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  _AudioSegmentStream = function AudioSegmentStream(track, options) {\n    var adtsFrames = [],\n        sequenceNumber,\n        earliestAllowedDts = 0,\n        audioAppendStartTs = 0,\n        videoBaseMediaDecodeTime = Infinity;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _AudioSegmentStream.prototype.init.call(this);\n\n    this.push = function (data) {\n      trackDecodeInfo.collectDtsInfo(track, data);\n\n      if (track) {\n        audioProperties.forEach(function (prop) {\n          track[prop] = data[prop];\n        });\n      } // buffer audio data until end() is called\n\n\n      adtsFrames.push(data);\n    };\n\n    this.setEarliestDts = function (earliestDts) {\n      earliestAllowedDts = earliestDts;\n    };\n\n    this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      videoBaseMediaDecodeTime = baseMediaDecodeTime;\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      audioAppendStartTs = timestamp;\n    };\n\n    this.flush = function () {\n      var frames, moof, mdat, boxes, frameDuration, segmentDuration, videoClockCyclesOfSilencePrefixed; // return early if no audio data has been observed\n\n      if (adtsFrames.length === 0) {\n        this.trigger('done', 'AudioSegmentStream');\n        return;\n      }\n\n      frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps); // amount of audio filled but the value is in video clock rather than audio clock\n\n      videoClockCyclesOfSilencePrefixed = audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to\n      // samples (that is, adts frames) in the audio data\n\n      track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat\n\n      mdat = mp4Generator.mdat(audioFrameUtils.concatenateFrameData(frames));\n      adtsFrames = [];\n      moof = mp4Generator.moof(sequenceNumber, [track]);\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      trackDecodeInfo.clearDtsInfo(track);\n      frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with\n      // tests) on adding the timingInfo event. However, it seems unlikely that there's a\n      // valid use-case where an init segment/data should be triggered without associated\n      // frames. Leaving for now, but should be looked into.\n\n      if (frames.length) {\n        segmentDuration = frames.length * frameDuration;\n        this.trigger('segmentTimingInfo', generateSegmentTimingInfo( // The audio track's baseMediaDecodeTime is in audio clock cycles, but the\n        // frame info is in video clock cycles. Convert to match expectation of\n        // listeners (that all timestamps will be based on video clock cycles).\n        clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate), // frame times are already in video clock, as is segment duration\n        frames[0].dts, frames[0].pts, frames[0].dts + segmentDuration, frames[0].pts + segmentDuration, videoClockCyclesOfSilencePrefixed || 0));\n        this.trigger('timingInfo', {\n          start: frames[0].pts,\n          end: frames[0].pts + segmentDuration\n        });\n      }\n\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.trigger('done', 'AudioSegmentStream');\n    };\n\n    this.reset = function () {\n      trackDecodeInfo.clearDtsInfo(track);\n      adtsFrames = [];\n      this.trigger('reset');\n    };\n  };\n\n  _AudioSegmentStream.prototype = new stream();\n  /**\n   * Constructs a single-track, ISO BMFF media segment from H264 data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n   *        gopsToAlignWith list when attempting to align gop pts\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n  _VideoSegmentStream = function VideoSegmentStream(track, options) {\n    var sequenceNumber,\n        nalUnits = [],\n        gopsToAlignWith = [],\n        config,\n        pps;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _VideoSegmentStream.prototype.init.call(this);\n\n    delete track.minPTS;\n    this.gopCache_ = [];\n    /**\n      * Constructs a ISO BMFF segment given H264 nalUnits\n      * @param {Object} nalUnit A data event representing a nalUnit\n      * @param {String} nalUnit.nalUnitType\n      * @param {Object} nalUnit.config Properties for a mp4 track\n      * @param {Uint8Array} nalUnit.data The nalUnit bytes\n      * @see lib/codecs/h264.js\n     **/\n\n    this.push = function (nalUnit) {\n      trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config\n\n      if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n        config = nalUnit.config;\n        track.sps = [nalUnit.data];\n        videoProperties.forEach(function (prop) {\n          track[prop] = config[prop];\n        }, this);\n      }\n\n      if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {\n        pps = nalUnit.data;\n        track.pps = [nalUnit.data];\n      } // buffer video until flush() is called\n\n\n      nalUnits.push(nalUnit);\n    };\n    /**\n      * Pass constructed ISO BMFF track and boxes on to the\n      * next stream in the pipeline\n     **/\n\n\n    this.flush = function () {\n      var frames,\n          gopForFusion,\n          gops,\n          moof,\n          mdat,\n          boxes,\n          prependedContentDuration = 0,\n          firstGop,\n          lastGop; // Throw away nalUnits at the start of the byte stream until\n      // we find the first AUD\n\n      while (nalUnits.length) {\n        if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n          break;\n        }\n\n        nalUnits.shift();\n      } // Return early if no video data has been observed\n\n\n      if (nalUnits.length === 0) {\n        this.resetStream_();\n        this.trigger('done', 'VideoSegmentStream');\n        return;\n      } // Organize the raw nal-units into arrays that represent\n      // higher-level constructs such as frames and gops\n      // (group-of-pictures)\n\n\n      frames = frameUtils.groupNalsIntoFrames(nalUnits);\n      gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have\n      // a problem since MSE (on Chrome) requires a leading keyframe.\n      //\n      // We have two approaches to repairing this situation:\n      // 1) GOP-FUSION:\n      //    This is where we keep track of the GOPS (group-of-pictures)\n      //    from previous fragments and attempt to find one that we can\n      //    prepend to the current fragment in order to create a valid\n      //    fragment.\n      // 2) KEYFRAME-PULLING:\n      //    Here we search for the first keyframe in the fragment and\n      //    throw away all the frames between the start of the fragment\n      //    and that keyframe. We then extend the duration and pull the\n      //    PTS of the keyframe forward so that it covers the time range\n      //    of the frames that were disposed of.\n      //\n      // #1 is far prefereable over #2 which can cause \"stuttering\" but\n      // requires more things to be just right.\n\n      if (!gops[0][0].keyFrame) {\n        // Search for a gop for fusion from our gopCache\n        gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n\n        if (gopForFusion) {\n          // in order to provide more accurate timing information about the segment, save\n          // the number of seconds prepended to the original segment due to GOP fusion\n          prependedContentDuration = gopForFusion.duration;\n          gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the\n          // new gop at the beginning\n\n          gops.byteLength += gopForFusion.byteLength;\n          gops.nalCount += gopForFusion.nalCount;\n          gops.pts = gopForFusion.pts;\n          gops.dts = gopForFusion.dts;\n          gops.duration += gopForFusion.duration;\n        } else {\n          // If we didn't find a candidate gop fall back to keyframe-pulling\n          gops = frameUtils.extendFirstKeyFrame(gops);\n        }\n      } // Trim gops to align with gopsToAlignWith\n\n\n      if (gopsToAlignWith.length) {\n        var alignedGops;\n\n        if (options.alignGopsAtEnd) {\n          alignedGops = this.alignGopsAtEnd_(gops);\n        } else {\n          alignedGops = this.alignGopsAtStart_(gops);\n        }\n\n        if (!alignedGops) {\n          // save all the nals in the last GOP into the gop cache\n          this.gopCache_.unshift({\n            gop: gops.pop(),\n            pps: track.pps,\n            sps: track.sps\n          }); // Keep a maximum of 6 GOPs in the cache\n\n          this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n          nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith\n\n          this.resetStream_();\n          this.trigger('done', 'VideoSegmentStream');\n          return;\n        } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n        // when recalculated before sending off to CoalesceStream\n\n\n        trackDecodeInfo.clearDtsInfo(track);\n        gops = alignedGops;\n      }\n\n      trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to\n      // samples (that is, frames) in the video data\n\n      track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat\n\n      mdat = mp4Generator.mdat(frameUtils.concatenateNalData(gops));\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n      this.trigger('processedGopsInfo', gops.map(function (gop) {\n        return {\n          pts: gop.pts,\n          dts: gop.dts,\n          byteLength: gop.byteLength\n        };\n      }));\n      firstGop = gops[0];\n      lastGop = gops[gops.length - 1];\n      this.trigger('segmentTimingInfo', generateSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));\n      this.trigger('timingInfo', {\n        start: gops[0].pts,\n        end: gops[gops.length - 1].pts + gops[gops.length - 1].duration\n      }); // save all the nals in the last GOP into the gop cache\n\n      this.gopCache_.unshift({\n        gop: gops.pop(),\n        pps: track.pps,\n        sps: track.sps\n      }); // Keep a maximum of 6 GOPs in the cache\n\n      this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n      nalUnits = [];\n      this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n      this.trigger('timelineStartInfo', track.timelineStartInfo);\n      moof = mp4Generator.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of\n      // throwing away hundreds of media segment fragments\n\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.resetStream_(); // Continue with the flush process now\n\n      this.trigger('done', 'VideoSegmentStream');\n    };\n\n    this.reset = function () {\n      this.resetStream_();\n      nalUnits = [];\n      this.gopCache_.length = 0;\n      gopsToAlignWith.length = 0;\n      this.trigger('reset');\n    };\n\n    this.resetStream_ = function () {\n      trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments\n      // for instance, when we are rendition switching\n\n      config = undefined;\n      pps = undefined;\n    }; // Search for a candidate Gop for gop-fusion from the gop cache and\n    // return it or return null if no good candidate was found\n\n\n    this.getGopForFusion_ = function (nalUnit) {\n      var halfSecond = 45000,\n          // Half-a-second in a 90khz clock\n      allowableOverlap = 10000,\n          // About 3 frames @ 30fps\n      nearestDistance = Infinity,\n          dtsDistance,\n          nearestGopObj,\n          currentGop,\n          currentGopObj,\n          i; // Search for the GOP nearest to the beginning of this nal unit\n\n      for (i = 0; i < this.gopCache_.length; i++) {\n        currentGopObj = this.gopCache_[i];\n        currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS\n\n        if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n          continue;\n        } // Reject Gops that would require a negative baseMediaDecodeTime\n\n\n        if (currentGop.dts < track.timelineStartInfo.dts) {\n          continue;\n        } // The distance between the end of the gop and the start of the nalUnit\n\n\n        dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within\n        // a half-second of the nal unit\n\n        if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {\n          // Always use the closest GOP we found if there is more than\n          // one candidate\n          if (!nearestGopObj || nearestDistance > dtsDistance) {\n            nearestGopObj = currentGopObj;\n            nearestDistance = dtsDistance;\n          }\n        }\n      }\n\n      if (nearestGopObj) {\n        return nearestGopObj.gop;\n      }\n\n      return null;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the START of the list\n\n\n    this.alignGopsAtStart_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n      byteLength = gops.byteLength;\n      nalCount = gops.nalCount;\n      duration = gops.duration;\n      alignIndex = gopIndex = 0;\n\n      while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          break;\n        }\n\n        if (gop.pts > align.pts) {\n          // this current gop starts after the current gop we want to align on, so increment\n          // align index\n          alignIndex++;\n          continue;\n        } // current gop starts before the current gop we want to align on. so increment gop\n        // index\n\n\n        gopIndex++;\n        byteLength -= gop.byteLength;\n        nalCount -= gop.nalCount;\n        duration -= gop.duration;\n      }\n\n      if (gopIndex === 0) {\n        // no gops to trim\n        return gops;\n      }\n\n      if (gopIndex === gops.length) {\n        // all gops trimmed, skip appending all gops\n        return null;\n      }\n\n      alignedGops = gops.slice(gopIndex);\n      alignedGops.byteLength = byteLength;\n      alignedGops.duration = duration;\n      alignedGops.nalCount = nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the END of the list\n\n\n    this.alignGopsAtEnd_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n      alignIndex = gopsToAlignWith.length - 1;\n      gopIndex = gops.length - 1;\n      alignEndIndex = null;\n      matchFound = false;\n\n      while (alignIndex >= 0 && gopIndex >= 0) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          matchFound = true;\n          break;\n        }\n\n        if (align.pts > gop.pts) {\n          alignIndex--;\n          continue;\n        }\n\n        if (alignIndex === gopsToAlignWith.length - 1) {\n          // gop.pts is greater than the last alignment candidate. If no match is found\n          // by the end of this loop, we still want to append gops that come after this\n          // point\n          alignEndIndex = gopIndex;\n        }\n\n        gopIndex--;\n      }\n\n      if (!matchFound && alignEndIndex === null) {\n        return null;\n      }\n\n      var trimIndex;\n\n      if (matchFound) {\n        trimIndex = gopIndex;\n      } else {\n        trimIndex = alignEndIndex;\n      }\n\n      if (trimIndex === 0) {\n        return gops;\n      }\n\n      var alignedGops = gops.slice(trimIndex);\n      var metadata = alignedGops.reduce(function (total, gop) {\n        total.byteLength += gop.byteLength;\n        total.duration += gop.duration;\n        total.nalCount += gop.nalCount;\n        return total;\n      }, {\n        byteLength: 0,\n        duration: 0,\n        nalCount: 0\n      });\n      alignedGops.byteLength = metadata.byteLength;\n      alignedGops.duration = metadata.duration;\n      alignedGops.nalCount = metadata.nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    };\n\n    this.alignGopsWith = function (newGopsToAlignWith) {\n      gopsToAlignWith = newGopsToAlignWith;\n    };\n  };\n\n  _VideoSegmentStream.prototype = new stream();\n  /**\n   * A Stream that can combine multiple streams (ie. audio & video)\n   * into a single output segment for MSE. Also supports audio-only\n   * and video-only streams.\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at media timeline start.\n   */\n\n  _CoalesceStream = function CoalesceStream(options, metadataStream) {\n    // Number of Tracks per output segment\n    // If greater than 1, we combine multiple\n    // tracks into a single segment\n    this.numberOfTracks = 0;\n    this.metadataStream = metadataStream;\n    options = options || {};\n\n    if (typeof options.remux !== 'undefined') {\n      this.remuxTracks = !!options.remux;\n    } else {\n      this.remuxTracks = true;\n    }\n\n    if (typeof options.keepOriginalTimestamps === 'boolean') {\n      this.keepOriginalTimestamps = options.keepOriginalTimestamps;\n    } else {\n      this.keepOriginalTimestamps = false;\n    }\n\n    this.pendingTracks = [];\n    this.videoTrack = null;\n    this.pendingBoxes = [];\n    this.pendingCaptions = [];\n    this.pendingMetadata = [];\n    this.pendingBytes = 0;\n    this.emittedTracks = 0;\n\n    _CoalesceStream.prototype.init.call(this); // Take output from multiple\n\n\n    this.push = function (output) {\n      // buffer incoming captions until the associated video segment\n      // finishes\n      if (output.text) {\n        return this.pendingCaptions.push(output);\n      } // buffer incoming id3 tags until the final flush\n\n\n      if (output.frames) {\n        return this.pendingMetadata.push(output);\n      } // Add this track to the list of pending tracks and store\n      // important information required for the construction of\n      // the final segment\n\n\n      this.pendingTracks.push(output.track);\n      this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?\n      // We unshift audio and push video because\n      // as of Chrome 75 when switching from\n      // one init segment to another if the video\n      // mdat does not appear after the audio mdat\n      // only audio will play for the duration of our transmux.\n\n      if (output.track.type === 'video') {\n        this.videoTrack = output.track;\n        this.pendingBoxes.push(output.boxes);\n      }\n\n      if (output.track.type === 'audio') {\n        this.audioTrack = output.track;\n        this.pendingBoxes.unshift(output.boxes);\n      }\n    };\n  };\n\n  _CoalesceStream.prototype = new stream();\n\n  _CoalesceStream.prototype.flush = function (flushSource) {\n    var offset = 0,\n        event = {\n      captions: [],\n      captionStreams: {},\n      metadata: [],\n      info: {}\n    },\n        caption,\n        id3,\n        initSegment,\n        timelineStartPts = 0,\n        i;\n\n    if (this.pendingTracks.length < this.numberOfTracks) {\n      if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {\n        // Return because we haven't received a flush from a data-generating\n        // portion of the segment (meaning that we have only recieved meta-data\n        // or captions.)\n        return;\n      } else if (this.remuxTracks) {\n        // Return until we have enough tracks from the pipeline to remux (if we\n        // are remuxing audio and video into a single MP4)\n        return;\n      } else if (this.pendingTracks.length === 0) {\n        // In the case where we receive a flush without any data having been\n        // received we consider it an emitted track for the purposes of coalescing\n        // `done` events.\n        // We do this for the case where there is an audio and video track in the\n        // segment but no audio data. (seen in several playlists with alternate\n        // audio tracks and no audio present in the main TS segments.)\n        this.emittedTracks++;\n\n        if (this.emittedTracks >= this.numberOfTracks) {\n          this.trigger('done');\n          this.emittedTracks = 0;\n        }\n\n        return;\n      }\n    }\n\n    if (this.videoTrack) {\n      timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n      videoProperties.forEach(function (prop) {\n        event.info[prop] = this.videoTrack[prop];\n      }, this);\n    } else if (this.audioTrack) {\n      timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n      audioProperties.forEach(function (prop) {\n        event.info[prop] = this.audioTrack[prop];\n      }, this);\n    }\n\n    if (this.videoTrack || this.audioTrack) {\n      if (this.pendingTracks.length === 1) {\n        event.type = this.pendingTracks[0].type;\n      } else {\n        event.type = 'combined';\n      }\n\n      this.emittedTracks += this.pendingTracks.length;\n      initSegment = mp4Generator.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment\n\n      event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov\n      // and track definitions\n\n      event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats\n\n      event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together\n\n      for (i = 0; i < this.pendingBoxes.length; i++) {\n        event.data.set(this.pendingBoxes[i], offset);\n        offset += this.pendingBoxes[i].byteLength;\n      } // Translate caption PTS times into second offsets to match the\n      // video timeline for the segment, and add track info\n\n\n      for (i = 0; i < this.pendingCaptions.length; i++) {\n        caption = this.pendingCaptions[i];\n        caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);\n        caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);\n        event.captionStreams[caption.stream] = true;\n        event.captions.push(caption);\n      } // Translate ID3 frame PTS times into second offsets to match the\n      // video timeline for the segment\n\n\n      for (i = 0; i < this.pendingMetadata.length; i++) {\n        id3 = this.pendingMetadata[i];\n        id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);\n        event.metadata.push(id3);\n      } // We add this to every single emitted segment even though we only need\n      // it for the first\n\n\n      event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state\n\n      this.pendingTracks.length = 0;\n      this.videoTrack = null;\n      this.pendingBoxes.length = 0;\n      this.pendingCaptions.length = 0;\n      this.pendingBytes = 0;\n      this.pendingMetadata.length = 0; // Emit the built segment\n      // We include captions and ID3 tags for backwards compatibility,\n      // ideally we should send only video and audio in the data event\n\n      this.trigger('data', event); // Emit each caption to the outside world\n      // Ideally, this would happen immediately on parsing captions,\n      // but we need to ensure that video data is sent back first\n      // so that caption timing can be adjusted to match video timing\n\n      for (i = 0; i < event.captions.length; i++) {\n        caption = event.captions[i];\n        this.trigger('caption', caption);\n      } // Emit each id3 tag to the outside world\n      // Ideally, this would happen immediately on parsing the tag,\n      // but we need to ensure that video data is sent back first\n      // so that ID3 frame timing can be adjusted to match video timing\n\n\n      for (i = 0; i < event.metadata.length; i++) {\n        id3 = event.metadata[i];\n        this.trigger('id3Frame', id3);\n      }\n    } // Only emit `done` if all tracks have been flushed and emitted\n\n\n    if (this.emittedTracks >= this.numberOfTracks) {\n      this.trigger('done');\n      this.emittedTracks = 0;\n    }\n  };\n\n  _CoalesceStream.prototype.setRemux = function (val) {\n    this.remuxTracks = val;\n  };\n  /**\n   * A Stream that expects MP2T binary data as input and produces\n   * corresponding media segments, suitable for use with Media Source\n   * Extension (MSE) implementations that support the ISO BMFF byte\n   * stream format, like Chrome.\n   */\n\n\n  _Transmuxer = function Transmuxer(options) {\n    var self = this,\n        hasFlushed = true,\n        videoTrack,\n        audioTrack;\n\n    _Transmuxer.prototype.init.call(this);\n\n    options = options || {};\n    this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n    this.transmuxPipeline_ = {};\n\n    this.setupAacPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'aac';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.aacStream = new aac();\n      pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');\n      pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');\n      pipeline.adtsStream = new adts();\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.aacStream;\n      pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);\n      pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);\n      pipeline.metadataStream.on('timestamp', function (frame) {\n        pipeline.aacStream.setTimestamp(frame.timeStamp);\n      });\n      pipeline.aacStream.on('data', function (data) {\n        if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {\n          return;\n        }\n\n        audioTrack = audioTrack || {\n          timelineStartInfo: {\n            baseMediaDecodeTime: self.baseMediaDecodeTime\n          },\n          codec: 'adts',\n          type: 'audio'\n        }; // hook up the audio segment stream to the first track with aac data\n\n        pipeline.coalesceStream.numberOfTracks++;\n        pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n        pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n        pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n        pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream); // emit pmt info\n\n        self.trigger('trackinfo', {\n          hasAudio: !!audioTrack,\n          hasVideo: !!videoTrack\n        });\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    };\n\n    this.setupTsPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'ts';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.packetStream = new m2ts_1.TransportPacketStream();\n      pipeline.parseStream = new m2ts_1.TransportParseStream();\n      pipeline.elementaryStream = new m2ts_1.ElementaryStream();\n      pipeline.timestampRolloverStream = new m2ts_1.TimestampRolloverStream();\n      pipeline.adtsStream = new adts();\n      pipeline.h264Stream = new H264Stream();\n      pipeline.captionStream = new m2ts_1.CaptionStream(options);\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams\n\n      pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!\n      // demux the streams\n\n      pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);\n      pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);\n      pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream\n\n      pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);\n      pipeline.elementaryStream.on('data', function (data) {\n        var i;\n\n        if (data.type === 'metadata') {\n          i = data.tracks.length; // scan the tracks listed in the metadata\n\n          while (i--) {\n            if (!videoTrack && data.tracks[i].type === 'video') {\n              videoTrack = data.tracks[i];\n              videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            } else if (!audioTrack && data.tracks[i].type === 'audio') {\n              audioTrack = data.tracks[i];\n              audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            }\n          } // hook up the video segment stream to the first track with h264 data\n\n\n          if (videoTrack && !pipeline.videoSegmentStream) {\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.videoSegmentStream = new _VideoSegmentStream(videoTrack, options);\n            pipeline.videoSegmentStream.on('log', self.getLogTrigger_('videoSegmentStream'));\n            pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {\n              // When video emits timelineStartInfo data after a flush, we forward that\n              // info to the AudioSegmentStream, if it exists, because video timeline\n              // data takes precedence.  Do not do this if keepOriginalTimestamps is set,\n              // because this is a particularly subtle form of timestamp alteration.\n              if (audioTrack && !options.keepOriginalTimestamps) {\n                audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the\n                // very earliest DTS we have seen in video because Chrome will\n                // interpret any video track with a baseMediaDecodeTime that is\n                // non-zero as a gap.\n\n                pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - self.baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));\n            pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));\n            pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {\n              if (audioTrack) {\n                pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline\n\n            pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);\n          }\n\n          if (audioTrack && !pipeline.audioSegmentStream) {\n            // hook up the audio segment stream to the first track with aac data\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n            pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n            pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo'));\n            pipeline.audioSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'audioSegmentTimingInfo')); // Set up the final part of the audio pipeline\n\n            pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n          } // emit pmt info\n\n\n          self.trigger('trackinfo', {\n            hasAudio: !!audioTrack,\n            hasVideo: !!videoTrack\n          });\n        }\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n      pipeline.coalesceStream.on('id3Frame', function (id3Frame) {\n        id3Frame.dispatchType = pipeline.metadataStream.dispatchType;\n        self.trigger('id3Frame', id3Frame);\n      });\n      pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    }; // hook up the segment streams once track metadata is delivered\n\n\n    this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      var pipeline = this.transmuxPipeline_;\n\n      if (!options.keepOriginalTimestamps) {\n        this.baseMediaDecodeTime = baseMediaDecodeTime;\n      }\n\n      if (audioTrack) {\n        audioTrack.timelineStartInfo.dts = undefined;\n        audioTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(audioTrack);\n\n        if (pipeline.audioTimestampRolloverStream) {\n          pipeline.audioTimestampRolloverStream.discontinuity();\n        }\n      }\n\n      if (videoTrack) {\n        if (pipeline.videoSegmentStream) {\n          pipeline.videoSegmentStream.gopCache_ = [];\n        }\n\n        videoTrack.timelineStartInfo.dts = undefined;\n        videoTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(videoTrack);\n        pipeline.captionStream.reset();\n      }\n\n      if (pipeline.timestampRolloverStream) {\n        pipeline.timestampRolloverStream.discontinuity();\n      }\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      if (audioTrack) {\n        this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n      }\n    };\n\n    this.setRemux = function (val) {\n      var pipeline = this.transmuxPipeline_;\n      options.remux = val;\n\n      if (pipeline && pipeline.coalesceStream) {\n        pipeline.coalesceStream.setRemux(val);\n      }\n    };\n\n    this.alignGopsWith = function (gopsToAlignWith) {\n      if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n        this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n      }\n    };\n\n    this.getLogTrigger_ = function (key) {\n      var self = this;\n      return function (event) {\n        event.stream = key;\n        self.trigger('log', event);\n      };\n    }; // feed incoming data to the front of the parsing pipeline\n\n\n    this.push = function (data) {\n      if (hasFlushed) {\n        var isAac = isLikelyAacData(data);\n\n        if (isAac && this.transmuxPipeline_.type !== 'aac') {\n          this.setupAacPipeline();\n        } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n          this.setupTsPipeline();\n        }\n\n        hasFlushed = false;\n      }\n\n      this.transmuxPipeline_.headOfPipeline.push(data);\n    }; // flush any buffered data\n\n\n    this.flush = function () {\n      hasFlushed = true; // Start at the top of the pipeline and flush all pending work\n\n      this.transmuxPipeline_.headOfPipeline.flush();\n    };\n\n    this.endTimeline = function () {\n      this.transmuxPipeline_.headOfPipeline.endTimeline();\n    };\n\n    this.reset = function () {\n      if (this.transmuxPipeline_.headOfPipeline) {\n        this.transmuxPipeline_.headOfPipeline.reset();\n      }\n    }; // Caption data has to be reset when seeking outside buffered range\n\n\n    this.resetCaptions = function () {\n      if (this.transmuxPipeline_.captionStream) {\n        this.transmuxPipeline_.captionStream.reset();\n      }\n    };\n  };\n\n  _Transmuxer.prototype = new stream();\n  var transmuxer = {\n    Transmuxer: _Transmuxer,\n    VideoSegmentStream: _VideoSegmentStream,\n    AudioSegmentStream: _AudioSegmentStream,\n    AUDIO_PROPERTIES: audioProperties,\n    VIDEO_PROPERTIES: videoProperties,\n    // exported for testing\n    generateSegmentTimingInfo: generateSegmentTimingInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var toUnsigned$3 = function toUnsigned(value) {\n    return value >>> 0;\n  };\n\n  var toHexString$1 = function toHexString(value) {\n    return ('00' + value.toString(16)).slice(-2);\n  };\n\n  var bin = {\n    toUnsigned: toUnsigned$3,\n    toHexString: toHexString$1\n  };\n\n  var parseType$1 = function parseType(buffer) {\n    var result = '';\n    result += String.fromCharCode(buffer[0]);\n    result += String.fromCharCode(buffer[1]);\n    result += String.fromCharCode(buffer[2]);\n    result += String.fromCharCode(buffer[3]);\n    return result;\n  };\n\n  var parseType_1 = parseType$1;\n  var toUnsigned$2 = bin.toUnsigned;\n\n  var findBox = function findBox(data, path) {\n    var results = [],\n        i,\n        size,\n        type,\n        end,\n        subresults;\n\n    if (!path.length) {\n      // short-circuit the search for empty paths\n      return null;\n    }\n\n    for (i = 0; i < data.byteLength;) {\n      size = toUnsigned$2(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);\n      type = parseType_1(data.subarray(i + 4, i + 8));\n      end = size > 1 ? i + size : data.byteLength;\n\n      if (type === path[0]) {\n        if (path.length === 1) {\n          // this is the end of the path and we've found the box we were\n          // looking for\n          results.push(data.subarray(i + 8, end));\n        } else {\n          // recursively search for the next box along the path\n          subresults = findBox(data.subarray(i + 8, end), path.slice(1));\n\n          if (subresults.length) {\n            results = results.concat(subresults);\n          }\n        }\n      }\n\n      i = end;\n    } // we've finished searching all of data\n\n\n    return results;\n  };\n\n  var findBox_1 = findBox;\n  var toUnsigned$1 = bin.toUnsigned;\n  var getUint64$1 = numbers.getUint64;\n\n  var tfdt = function tfdt(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n\n    if (result.version === 1) {\n      result.baseMediaDecodeTime = getUint64$1(data.subarray(4));\n    } else {\n      result.baseMediaDecodeTime = toUnsigned$1(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);\n    }\n\n    return result;\n  };\n\n  var parseTfdt = tfdt;\n\n  var parseSampleFlags = function parseSampleFlags(flags) {\n    return {\n      isLeading: (flags[0] & 0x0c) >>> 2,\n      dependsOn: flags[0] & 0x03,\n      isDependedOn: (flags[1] & 0xc0) >>> 6,\n      hasRedundancy: (flags[1] & 0x30) >>> 4,\n      paddingValue: (flags[1] & 0x0e) >>> 1,\n      isNonSyncSample: flags[1] & 0x01,\n      degradationPriority: flags[2] << 8 | flags[3]\n    };\n  };\n\n  var parseSampleFlags_1 = parseSampleFlags;\n\n  var trun = function trun(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      samples: []\n    },\n        view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        // Flag interpretation\n    dataOffsetPresent = result.flags[2] & 0x01,\n        // compare with 2nd byte of 0x1\n    firstSampleFlagsPresent = result.flags[2] & 0x04,\n        // compare with 2nd byte of 0x4\n    sampleDurationPresent = result.flags[1] & 0x01,\n        // compare with 2nd byte of 0x100\n    sampleSizePresent = result.flags[1] & 0x02,\n        // compare with 2nd byte of 0x200\n    sampleFlagsPresent = result.flags[1] & 0x04,\n        // compare with 2nd byte of 0x400\n    sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,\n        // compare with 2nd byte of 0x800\n    sampleCount = view.getUint32(4),\n        offset = 8,\n        sample;\n\n    if (dataOffsetPresent) {\n      // 32 bit signed integer\n      result.dataOffset = view.getInt32(offset);\n      offset += 4;\n    } // Overrides the flags for the first sample only. The order of\n    // optional values will be: duration, size, compositionTimeOffset\n\n\n    if (firstSampleFlagsPresent && sampleCount) {\n      sample = {\n        flags: parseSampleFlags_1(data.subarray(offset, offset + 4))\n      };\n      offset += 4;\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n      sampleCount--;\n    }\n\n    while (sampleCount--) {\n      sample = {};\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleFlagsPresent) {\n        sample.flags = parseSampleFlags_1(data.subarray(offset, offset + 4));\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n    }\n\n    return result;\n  };\n\n  var parseTrun = trun;\n\n  var tfhd = function tfhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      trackId: view.getUint32(4)\n    },\n        baseDataOffsetPresent = result.flags[2] & 0x01,\n        sampleDescriptionIndexPresent = result.flags[2] & 0x02,\n        defaultSampleDurationPresent = result.flags[2] & 0x08,\n        defaultSampleSizePresent = result.flags[2] & 0x10,\n        defaultSampleFlagsPresent = result.flags[2] & 0x20,\n        durationIsEmpty = result.flags[0] & 0x010000,\n        defaultBaseIsMoof = result.flags[0] & 0x020000,\n        i;\n    i = 8;\n\n    if (baseDataOffsetPresent) {\n      i += 4; // truncate top 4 bytes\n      // FIXME: should we read the full 64 bits?\n\n      result.baseDataOffset = view.getUint32(12);\n      i += 4;\n    }\n\n    if (sampleDescriptionIndexPresent) {\n      result.sampleDescriptionIndex = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleDurationPresent) {\n      result.defaultSampleDuration = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleSizePresent) {\n      result.defaultSampleSize = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleFlagsPresent) {\n      result.defaultSampleFlags = view.getUint32(i);\n    }\n\n    if (durationIsEmpty) {\n      result.durationIsEmpty = true;\n    }\n\n    if (!baseDataOffsetPresent && defaultBaseIsMoof) {\n      result.baseDataOffsetIsMoof = true;\n    }\n\n    return result;\n  };\n\n  var parseTfhd = tfhd;\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n  var discardEmulationPreventionBytes = captionPacketParser.discardEmulationPreventionBytes;\n  var CaptionStream = captionStream.CaptionStream;\n  /**\n    * Maps an offset in the mdat to a sample based on the the size of the samples.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Number} offset - The offset into the mdat\n    * @param {Object[]} samples - An array of samples, parsed using `parseSamples`\n    * @return {?Object} The matching sample, or null if no match was found.\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n  var mapToSample = function mapToSample(offset, samples) {\n    var approximateOffset = offset;\n\n    for (var i = 0; i < samples.length; i++) {\n      var sample = samples[i];\n\n      if (approximateOffset < sample.size) {\n        return sample;\n      }\n\n      approximateOffset -= sample.size;\n    }\n\n    return null;\n  };\n  /**\n    * Finds SEI nal units contained in a Media Data Box.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Uint8Array} avcStream - The bytes of the mdat\n    * @param {Object[]} samples - The samples parsed out by `parseSamples`\n    * @param {Number} trackId - The trackId of this video track\n    * @return {Object[]} seiNals - the parsed SEI NALUs found.\n    *   The contents of the seiNal should match what is expected by\n    *   CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)\n    *\n    * @see ISO-BMFF-12/2015, Section 8.1.1\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n   **/\n\n\n  var findSeiNals = function findSeiNals(avcStream, samples, trackId) {\n    var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n        result = {\n      logs: [],\n      seiNals: []\n    },\n        seiNal,\n        i,\n        length,\n        lastMatchedSample;\n\n    for (i = 0; i + 4 < avcStream.length; i += length) {\n      length = avcView.getUint32(i);\n      i += 4; // Bail if this doesn't appear to be an H264 stream\n\n      if (length <= 0) {\n        continue;\n      }\n\n      switch (avcStream[i] & 0x1F) {\n        case 0x06:\n          var data = avcStream.subarray(i + 1, i + 1 + length);\n          var matchingSample = mapToSample(i, samples);\n          seiNal = {\n            nalUnitType: 'sei_rbsp',\n            size: length,\n            data: data,\n            escapedRBSP: discardEmulationPreventionBytes(data),\n            trackId: trackId\n          };\n\n          if (matchingSample) {\n            seiNal.pts = matchingSample.pts;\n            seiNal.dts = matchingSample.dts;\n            lastMatchedSample = matchingSample;\n          } else if (lastMatchedSample) {\n            // If a matching sample cannot be found, use the last\n            // sample's values as they should be as close as possible\n            seiNal.pts = lastMatchedSample.pts;\n            seiNal.dts = lastMatchedSample.dts;\n          } else {\n            result.logs.push({\n              level: 'warn',\n              message: 'We\\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'\n            });\n            break;\n          }\n\n          result.seiNals.push(seiNal);\n          break;\n      }\n    }\n\n    return result;\n  };\n  /**\n    * Parses sample information out of Track Run Boxes and calculates\n    * the absolute presentation and decode timestamps of each sample.\n    *\n    * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed\n    * @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt\n        @see ISO-BMFF-12/2015, Section 8.8.12\n    * @param {Object} tfhd - The parsed Track Fragment Header\n    *   @see inspect.parseTfhd\n    * @return {Object[]} the parsed samples\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n\n  var parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {\n    var currentDts = baseMediaDecodeTime;\n    var defaultSampleDuration = tfhd.defaultSampleDuration || 0;\n    var defaultSampleSize = tfhd.defaultSampleSize || 0;\n    var trackId = tfhd.trackId;\n    var allSamples = [];\n    truns.forEach(function (trun) {\n      // Note: We currently do not parse the sample table as well\n      // as the trun. It's possible some sources will require this.\n      // moov > trak > mdia > minf > stbl\n      var trackRun = parseTrun(trun);\n      var samples = trackRun.samples;\n      samples.forEach(function (sample) {\n        if (sample.duration === undefined) {\n          sample.duration = defaultSampleDuration;\n        }\n\n        if (sample.size === undefined) {\n          sample.size = defaultSampleSize;\n        }\n\n        sample.trackId = trackId;\n        sample.dts = currentDts;\n\n        if (sample.compositionTimeOffset === undefined) {\n          sample.compositionTimeOffset = 0;\n        }\n\n        if (typeof currentDts === 'bigint') {\n          sample.pts = currentDts + window_1.BigInt(sample.compositionTimeOffset);\n          currentDts += window_1.BigInt(sample.duration);\n        } else {\n          sample.pts = currentDts + sample.compositionTimeOffset;\n          currentDts += sample.duration;\n        }\n      });\n      allSamples = allSamples.concat(samples);\n    });\n    return allSamples;\n  };\n  /**\n    * Parses out caption nals from an FMP4 segment's video tracks.\n    *\n    * @param {Uint8Array} segment - The bytes of a single segment\n    * @param {Number} videoTrackId - The trackId of a video track in the segment\n    * @return {Object.<Number, Object[]>} A mapping of video trackId to\n    *   a list of seiNals found in that track\n   **/\n\n\n  var parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {\n    // To get the samples\n    var trafs = findBox_1(segment, ['moof', 'traf']); // To get SEI NAL units\n\n    var mdats = findBox_1(segment, ['mdat']);\n    var captionNals = {};\n    var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs\n\n    mdats.forEach(function (mdat, index) {\n      var matchingTraf = trafs[index];\n      mdatTrafPairs.push({\n        mdat: mdat,\n        traf: matchingTraf\n      });\n    });\n    mdatTrafPairs.forEach(function (pair) {\n      var mdat = pair.mdat;\n      var traf = pair.traf;\n      var tfhd = findBox_1(traf, ['tfhd']); // Exactly 1 tfhd per traf\n\n      var headerInfo = parseTfhd(tfhd[0]);\n      var trackId = headerInfo.trackId;\n      var tfdt = findBox_1(traf, ['tfdt']); // Either 0 or 1 tfdt per traf\n\n      var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;\n      var truns = findBox_1(traf, ['trun']);\n      var samples;\n      var result; // Only parse video data for the chosen video track\n\n      if (videoTrackId === trackId && truns.length > 0) {\n        samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);\n        result = findSeiNals(mdat, samples, trackId);\n\n        if (!captionNals[trackId]) {\n          captionNals[trackId] = {\n            seiNals: [],\n            logs: []\n          };\n        }\n\n        captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);\n        captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);\n      }\n    });\n    return captionNals;\n  };\n  /**\n    * Parses out inband captions from an MP4 container and returns\n    * caption objects that can be used by WebVTT and the TextTrack API.\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack\n    * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first\n    *\n    * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n    * @param {Number} trackId - The id of the video track to parse\n    * @param {Number} timescale - The timescale for the video track from the init segment\n    *\n    * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks\n    * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds\n    * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds\n    * @return {String} parsedCaptions[].text - The visible content of the caption\n   **/\n\n\n  var parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {\n    var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n\n    if (trackId === null) {\n      return null;\n    }\n\n    captionNals = parseCaptionNals(segment, trackId);\n    var trackNals = captionNals[trackId] || {};\n    return {\n      seiNals: trackNals.seiNals,\n      logs: trackNals.logs,\n      timescale: timescale\n    };\n  };\n  /**\n    * Converts SEI NALUs into captions that can be used by video.js\n   **/\n\n\n  var CaptionParser = function CaptionParser() {\n    var isInitialized = false;\n    var captionStream; // Stores segments seen before trackId and timescale are set\n\n    var segmentCache; // Stores video track ID of the track being parsed\n\n    var trackId; // Stores the timescale of the track being parsed\n\n    var timescale; // Stores captions parsed so far\n\n    var parsedCaptions; // Stores whether we are receiving partial data or not\n\n    var parsingPartial;\n    /**\n      * A method to indicate whether a CaptionParser has been initalized\n      * @returns {Boolean}\n     **/\n\n    this.isInitialized = function () {\n      return isInitialized;\n    };\n    /**\n      * Initializes the underlying CaptionStream, SEI NAL parsing\n      * and management, and caption collection\n     **/\n\n\n    this.init = function (options) {\n      captionStream = new CaptionStream();\n      isInitialized = true;\n      parsingPartial = options ? options.isPartial : false; // Collect dispatched captions\n\n      captionStream.on('data', function (event) {\n        // Convert to seconds in the source's timescale\n        event.startTime = event.startPts / timescale;\n        event.endTime = event.endPts / timescale;\n        parsedCaptions.captions.push(event);\n        parsedCaptions.captionStreams[event.stream] = true;\n      });\n      captionStream.on('log', function (log) {\n        parsedCaptions.logs.push(log);\n      });\n    };\n    /**\n      * Determines if a new video track will be selected\n      * or if the timescale changed\n      * @return {Boolean}\n     **/\n\n\n    this.isNewInit = function (videoTrackIds, timescales) {\n      if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {\n        return false;\n      }\n\n      return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];\n    };\n    /**\n      * Parses out SEI captions and interacts with underlying\n      * CaptionStream to return dispatched captions\n      *\n      * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n      * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment\n      * @param {Object.<Number, Number>} timescales - The timescales found in the init segment\n      * @see parseEmbeddedCaptions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.parse = function (segment, videoTrackIds, timescales) {\n      var parsedData;\n\n      if (!this.isInitialized()) {\n        return null; // This is not likely to be a video segment\n      } else if (!videoTrackIds || !timescales) {\n        return null;\n      } else if (this.isNewInit(videoTrackIds, timescales)) {\n        // Use the first video track only as there is no\n        // mechanism to switch to other video tracks\n        trackId = videoTrackIds[0];\n        timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment\n        // data until we have one.\n        // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n      } else if (trackId === null || !timescale) {\n        segmentCache.push(segment);\n        return null;\n      } // Now that a timescale and trackId is set, parse cached segments\n\n\n      while (segmentCache.length > 0) {\n        var cachedSegment = segmentCache.shift();\n        this.parse(cachedSegment, videoTrackIds, timescales);\n      }\n\n      parsedData = parseEmbeddedCaptions(segment, trackId, timescale);\n\n      if (parsedData && parsedData.logs) {\n        parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);\n      }\n\n      if (parsedData === null || !parsedData.seiNals) {\n        if (parsedCaptions.logs.length) {\n          return {\n            logs: parsedCaptions.logs,\n            captions: [],\n            captionStreams: []\n          };\n        }\n\n        return null;\n      }\n\n      this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched\n\n      this.flushStream();\n      return parsedCaptions;\n    };\n    /**\n      * Pushes SEI NALUs onto CaptionStream\n      * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`\n      * Assumes that `parseCaptionNals` has been called first\n      * @see m2ts/caption-stream.js\n      **/\n\n\n    this.pushNals = function (nals) {\n      if (!this.isInitialized() || !nals || nals.length === 0) {\n        return null;\n      }\n\n      nals.forEach(function (nal) {\n        captionStream.push(nal);\n      });\n    };\n    /**\n      * Flushes underlying CaptionStream to dispatch processed, displayable captions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.flushStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      if (!parsingPartial) {\n        captionStream.flush();\n      } else {\n        captionStream.partialFlush();\n      }\n    };\n    /**\n      * Reset caption buckets for new data\n     **/\n\n\n    this.clearParsedCaptions = function () {\n      parsedCaptions.captions = [];\n      parsedCaptions.captionStreams = {};\n      parsedCaptions.logs = [];\n    };\n    /**\n      * Resets underlying CaptionStream\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.resetCaptionStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      captionStream.reset();\n    };\n    /**\n      * Convenience method to clear all captions flushed from the\n      * CaptionStream and still being parsed\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.clearAllCaptions = function () {\n      this.clearParsedCaptions();\n      this.resetCaptionStream();\n    };\n    /**\n      * Reset caption parser\n     **/\n\n\n    this.reset = function () {\n      segmentCache = [];\n      trackId = null;\n      timescale = null;\n\n      if (!parsedCaptions) {\n        parsedCaptions = {\n          captions: [],\n          // CC1, CC2, CC3, CC4\n          captionStreams: {},\n          logs: []\n        };\n      } else {\n        this.clearParsedCaptions();\n      }\n\n      this.resetCaptionStream();\n    };\n\n    this.reset();\n  };\n\n  var captionParser = CaptionParser;\n  var toUnsigned = bin.toUnsigned;\n  var toHexString = bin.toHexString;\n  var getUint64 = numbers.getUint64;\n  var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader;\n  /**\n   * Parses an MP4 initialization segment and extracts the timescale\n   * values for any declared tracks. Timescale values indicate the\n   * number of clock ticks per second to assume for time-based values\n   * elsewhere in the MP4.\n   *\n   * To determine the start time of an MP4, you need two pieces of\n   * information: the timescale unit and the earliest base media decode\n   * time. Multiple timescales can be specified within an MP4 but the\n   * base media decode time is always expressed in the timescale from\n   * the media header box for the track:\n   * ```\n   * moov > trak > mdia > mdhd.timescale\n   * ```\n   * @param init {Uint8Array} the bytes of the init segment\n   * @return {object} a hash of track ids to timescale values or null if\n   * the init segment is malformed.\n   */\n\n  timescale = function timescale(init) {\n    var result = {},\n        traks = findBox_1(init, ['moov', 'trak']); // mdhd timescale\n\n    return traks.reduce(function (result, trak) {\n      var tkhd, version, index, id, mdhd;\n      tkhd = findBox_1(trak, ['tkhd'])[0];\n\n      if (!tkhd) {\n        return null;\n      }\n\n      version = tkhd[0];\n      index = version === 0 ? 12 : 20;\n      id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);\n      mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (!mdhd) {\n        return null;\n      }\n\n      version = mdhd[0];\n      index = version === 0 ? 12 : 20;\n      result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n      return result;\n    }, result);\n  };\n  /**\n   * Determine the base media decode start time, in seconds, for an MP4\n   * fragment. If multiple fragments are specified, the earliest time is\n   * returned.\n   *\n   * The base media decode time can be parsed from track fragment\n   * metadata:\n   * ```\n   * moof > traf > tfdt.baseMediaDecodeTime\n   * ```\n   * It requires the timescale value from the mdhd to interpret.\n   *\n   * @param timescale {object} a hash of track ids to timescale values.\n   * @return {number} the earliest base media decode start time for the\n   * fragment, in seconds\n   */\n\n\n  startTime = function startTime(timescale, fragment) {\n    var trafs; // we need info from two childrend of each track fragment box\n\n    trafs = findBox_1(fragment, ['moof', 'traf']); // determine the start times for each track\n\n    var lowestTime = trafs.reduce(function (acc, traf) {\n      var tfhd = findBox_1(traf, ['tfhd'])[0]; // get the track id from the tfhd\n\n      var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified\n\n      var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt\n\n      var tfdt = findBox_1(traf, ['tfdt'])[0];\n      var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);\n      var baseTime; // version 1 is 64 bit\n\n      if (tfdt[0] === 1) {\n        baseTime = getUint64(tfdt.subarray(4, 12));\n      } else {\n        baseTime = dv.getUint32(4);\n      } // convert base time to seconds if it is a valid number.\n\n\n      var seconds;\n\n      if (typeof baseTime === 'bigint') {\n        seconds = baseTime / window_1.BigInt(scale);\n      } else if (typeof baseTime === 'number' && !isNaN(baseTime)) {\n        seconds = baseTime / scale;\n      }\n\n      if (seconds < Number.MAX_SAFE_INTEGER) {\n        seconds = Number(seconds);\n      }\n\n      if (seconds < acc) {\n        acc = seconds;\n      }\n\n      return acc;\n    }, Infinity);\n    return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;\n  };\n  /**\n   * Determine the composition start, in seconds, for an MP4\n   * fragment.\n   *\n   * The composition start time of a fragment can be calculated using the base\n   * media decode time, composition time offset, and timescale, as follows:\n   *\n   * compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale\n   *\n   * All of the aforementioned information is contained within a media fragment's\n   * `traf` box, except for timescale info, which comes from the initialization\n   * segment, so a track id (also contained within a `traf`) is also necessary to\n   * associate it with a timescale\n   *\n   *\n   * @param timescales {object} - a hash of track ids to timescale values.\n   * @param fragment {Unit8Array} - the bytes of a media segment\n   * @return {number} the composition start time for the fragment, in seconds\n   **/\n\n\n  compositionStartTime = function compositionStartTime(timescales, fragment) {\n    var trafBoxes = findBox_1(fragment, ['moof', 'traf']);\n    var baseMediaDecodeTime = 0;\n    var compositionTimeOffset = 0;\n    var trackId;\n\n    if (trafBoxes && trafBoxes.length) {\n      // The spec states that track run samples contained within a `traf` box are contiguous, but\n      // it does not explicitly state whether the `traf` boxes themselves are contiguous.\n      // We will assume that they are, so we only need the first to calculate start time.\n      var tfhd = findBox_1(trafBoxes[0], ['tfhd'])[0];\n      var trun = findBox_1(trafBoxes[0], ['trun'])[0];\n      var tfdt = findBox_1(trafBoxes[0], ['tfdt'])[0];\n\n      if (tfhd) {\n        var parsedTfhd = parseTfhd(tfhd);\n        trackId = parsedTfhd.trackId;\n      }\n\n      if (tfdt) {\n        var parsedTfdt = parseTfdt(tfdt);\n        baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;\n      }\n\n      if (trun) {\n        var parsedTrun = parseTrun(trun);\n\n        if (parsedTrun.samples && parsedTrun.samples.length) {\n          compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;\n        }\n      }\n    } // Get timescale for this specific track. Assume a 90kHz clock if no timescale was\n    // specified.\n\n\n    var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds\n\n    if (typeof baseMediaDecodeTime === 'bigint') {\n      compositionTimeOffset = window_1.BigInt(compositionTimeOffset);\n      timescale = window_1.BigInt(timescale);\n    }\n\n    var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;\n\n    if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {\n      result = Number(result);\n    }\n\n    return result;\n  };\n  /**\n    * Find the trackIds of the video tracks in this source.\n    * Found by parsing the Handler Reference and Track Header Boxes:\n    *   moov > trak > mdia > hdlr\n    *   moov > trak > tkhd\n    *\n    * @param {Uint8Array} init - The bytes of the init segment for this source\n    * @return {Number[]} A list of trackIds\n    *\n    * @see ISO-BMFF-12/2015, Section 8.4.3\n   **/\n\n\n  getVideoTrackIds = function getVideoTrackIds(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var videoTrackIds = [];\n    traks.forEach(function (trak) {\n      var hdlrs = findBox_1(trak, ['mdia', 'hdlr']);\n      var tkhds = findBox_1(trak, ['tkhd']);\n      hdlrs.forEach(function (hdlr, index) {\n        var handlerType = parseType_1(hdlr.subarray(8, 12));\n        var tkhd = tkhds[index];\n        var view;\n        var version;\n        var trackId;\n\n        if (handlerType === 'vide') {\n          view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n          version = view.getUint8(0);\n          trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);\n          videoTrackIds.push(trackId);\n        }\n      });\n    });\n    return videoTrackIds;\n  };\n\n  getTimescaleFromMediaHeader = function getTimescaleFromMediaHeader(mdhd) {\n    // mdhd is a FullBox, meaning it will have its own version as the first byte\n    var version = mdhd[0];\n    var index = version === 0 ? 12 : 20;\n    return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n  };\n  /**\n   * Get all the video, audio, and hint tracks from a non fragmented\n   * mp4 segment\n   */\n\n\n  getTracks = function getTracks(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var tracks = [];\n    traks.forEach(function (trak) {\n      var track = {};\n      var tkhd = findBox_1(trak, ['tkhd'])[0];\n      var view, tkhdVersion; // id\n\n      if (tkhd) {\n        view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n        tkhdVersion = view.getUint8(0);\n        track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n      }\n\n      var hdlr = findBox_1(trak, ['mdia', 'hdlr'])[0]; // type\n\n      if (hdlr) {\n        var type = parseType_1(hdlr.subarray(8, 12));\n\n        if (type === 'vide') {\n          track.type = 'video';\n        } else if (type === 'soun') {\n          track.type = 'audio';\n        } else {\n          track.type = type;\n        }\n      } // codec\n\n\n      var stsd = findBox_1(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];\n\n      if (stsd) {\n        var sampleDescriptions = stsd.subarray(8); // gives the codec type string\n\n        track.codec = parseType_1(sampleDescriptions.subarray(4, 8));\n        var codecBox = findBox_1(sampleDescriptions, [track.codec])[0];\n        var codecConfig, codecConfigType;\n\n        if (codecBox) {\n          // https://tools.ietf.org/html/rfc6381#section-3.3\n          if (/^[asm]vc[1-9]$/i.test(track.codec)) {\n            // we don't need anything but the \"config\" parameter of the\n            // avc1 codecBox\n            codecConfig = codecBox.subarray(78);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'avcC' && codecConfig.length > 11) {\n              track.codec += '.'; // left padded with zeroes for single digit hex\n              // profile idc\n\n              track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags\n\n              track.codec += toHexString(codecConfig[10]); // level idc\n\n              track.codec += toHexString(codecConfig[11]);\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'avc1.4d400d';\n            }\n          } else if (/^mp4[a,v]$/i.test(track.codec)) {\n            // we do not need anything but the streamDescriptor of the mp4a codecBox\n            codecConfig = codecBox.subarray(28);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {\n              track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit\n\n              track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'mp4a.40.2';\n            }\n          } else {\n            // flac, opus, etc\n            track.codec = track.codec.toLowerCase();\n          }\n        }\n      }\n\n      var mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (mdhd) {\n        track.timescale = getTimescaleFromMediaHeader(mdhd);\n      }\n\n      tracks.push(track);\n    });\n    return tracks;\n  };\n\n  var probe$2 = {\n    // export mp4 inspector's findBox and parseType for backwards compatibility\n    findBox: findBox_1,\n    parseType: parseType_1,\n    timescale: timescale,\n    startTime: startTime,\n    compositionStartTime: compositionStartTime,\n    videoTrackIds: getVideoTrackIds,\n    tracks: getTracks,\n    getTimescaleFromMediaHeader: getTimescaleFromMediaHeader\n  };\n\n  var parsePid = function parsePid(packet) {\n    var pid = packet[1] & 0x1f;\n    pid <<= 8;\n    pid |= packet[2];\n    return pid;\n  };\n\n  var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {\n    return !!(packet[1] & 0x40);\n  };\n\n  var parseAdaptionField = function parseAdaptionField(packet) {\n    var offset = 0; // if an adaption field is present, its length is specified by the\n    // fifth byte of the TS packet header. The adaptation field is\n    // used to add stuffing to PES packets that don't fill a complete\n    // TS packet, and to specify some forms of timing and control data\n    // that we do not currently use.\n\n    if ((packet[3] & 0x30) >>> 4 > 0x01) {\n      offset += packet[4] + 1;\n    }\n\n    return offset;\n  };\n\n  var parseType = function parseType(packet, pmtPid) {\n    var pid = parsePid(packet);\n\n    if (pid === 0) {\n      return 'pat';\n    } else if (pid === pmtPid) {\n      return 'pmt';\n    } else if (pmtPid) {\n      return 'pes';\n    }\n\n    return null;\n  };\n\n  var parsePat = function parsePat(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      offset += packet[offset] + 1;\n    }\n\n    return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n  };\n\n  var parsePmt = function parsePmt(packet) {\n    var programMapTable = {};\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var payloadOffset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      payloadOffset += packet[payloadOffset] + 1;\n    } // PMTs can be sent ahead of the time when they should actually\n    // take effect. We don't believe this should ever be the case\n    // for HLS but we'll ignore \"forward\" PMT declarations if we see\n    // them. Future PMT declarations have the current_next_indicator\n    // set to zero.\n\n\n    if (!(packet[payloadOffset + 5] & 0x01)) {\n      return;\n    }\n\n    var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section\n\n    sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n    tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n    // long the program info descriptors are\n\n    programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table\n\n    var offset = 12 + programInfoLength;\n\n    while (offset < tableEnd) {\n      var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type\n\n      programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry\n      // skip past the elementary stream descriptors, if present\n\n      offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n    }\n\n    return programMapTable;\n  };\n\n  var parsePesType = function parsePesType(packet, programMapTable) {\n    var pid = parsePid(packet);\n    var type = programMapTable[pid];\n\n    switch (type) {\n      case streamTypes.H264_STREAM_TYPE:\n        return 'video';\n\n      case streamTypes.ADTS_STREAM_TYPE:\n        return 'audio';\n\n      case streamTypes.METADATA_STREAM_TYPE:\n        return 'timed-metadata';\n\n      default:\n        return null;\n    }\n  };\n\n  var parsePesTime = function parsePesTime(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n\n    if (!pusi) {\n      return null;\n    }\n\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (offset >= packet.byteLength) {\n      // From the H 222.0 MPEG-TS spec\n      // \"For transport stream packets carrying PES packets, stuffing is needed when there\n      //  is insufficient PES packet data to completely fill the transport stream packet\n      //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n      //  the sum of the lengths of the data elements in it, so that the payload bytes\n      //  remaining after the adaptation field exactly accommodates the available PES packet\n      //  data.\"\n      //\n      // If the offset is >= the length of the packet, then the packet contains no data\n      // and instead is just adaption field stuffing bytes\n      return null;\n    }\n\n    var pes = null;\n    var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value\n    // and a DTS value. Determine what combination of values is\n    // available to work with.\n\n    ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n    // performs all bitwise operations on 32-bit integers but javascript\n    // supports a much greater range (52-bits) of integer using standard\n    // mathematical operations.\n    // We construct a 31-bit value using bitwise operators over the 31\n    // most significant bits and then multiply by 4 (equal to a left-shift\n    // of 2) before we add the final 2 least significant bits of the\n    // timestamp (equal to an OR.)\n\n    if (ptsDtsFlags & 0xC0) {\n      pes = {}; // the PTS and DTS are not written out directly. For information\n      // on how they are encoded, see\n      // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n\n      pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;\n      pes.pts *= 4; // Left shift by 2\n\n      pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n\n      pes.dts = pes.pts;\n\n      if (ptsDtsFlags & 0x40) {\n        pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;\n        pes.dts *= 4; // Left shift by 2\n\n        pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n      }\n    }\n\n    return pes;\n  };\n\n  var parseNalUnitType = function parseNalUnitType(type) {\n    switch (type) {\n      case 0x05:\n        return 'slice_layer_without_partitioning_rbsp_idr';\n\n      case 0x06:\n        return 'sei_rbsp';\n\n      case 0x07:\n        return 'seq_parameter_set_rbsp';\n\n      case 0x08:\n        return 'pic_parameter_set_rbsp';\n\n      case 0x09:\n        return 'access_unit_delimiter_rbsp';\n\n      default:\n        return null;\n    }\n  };\n\n  var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {\n    var offset = 4 + parseAdaptionField(packet);\n    var frameBuffer = packet.subarray(offset);\n    var frameI = 0;\n    var frameSyncPoint = 0;\n    var foundKeyFrame = false;\n    var nalType; // advance the sync point to a NAL start, if necessary\n\n    for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n      if (frameBuffer[frameSyncPoint + 2] === 1) {\n        // the sync point is properly aligned\n        frameI = frameSyncPoint + 5;\n        break;\n      }\n    }\n\n    while (frameI < frameBuffer.byteLength) {\n      // look at the current byte to determine if we've hit the end of\n      // a NAL unit boundary\n      switch (frameBuffer[frameI]) {\n        case 0:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0) {\n            frameI += 2;\n            break;\n          } else if (frameBuffer[frameI - 2] !== 0) {\n            frameI++;\n            break;\n          }\n\n          if (frameSyncPoint + 3 !== frameI - 2) {\n            nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n            if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n              foundKeyFrame = true;\n            }\n          } // drop trailing zeroes\n\n\n          do {\n            frameI++;\n          } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        case 1:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {\n            frameI += 3;\n            break;\n          }\n\n          nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n          if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n            foundKeyFrame = true;\n          }\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        default:\n          // the current byte isn't a one or zero, so it cannot be part\n          // of a sync sequence\n          frameI += 3;\n          break;\n      }\n    }\n\n    frameBuffer = frameBuffer.subarray(frameSyncPoint);\n    frameI -= frameSyncPoint;\n    frameSyncPoint = 0; // parse the final nal\n\n    if (frameBuffer && frameBuffer.byteLength > 3) {\n      nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n      if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n        foundKeyFrame = true;\n      }\n    }\n\n    return foundKeyFrame;\n  };\n\n  var probe$1 = {\n    parseType: parseType,\n    parsePat: parsePat,\n    parsePmt: parsePmt,\n    parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n    parsePesType: parsePesType,\n    parsePesTime: parsePesTime,\n    videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n  };\n  var handleRollover = timestampRolloverStream.handleRollover;\n  var probe = {};\n  probe.ts = probe$1;\n  probe.aac = utils;\n  var ONE_SECOND_IN_TS = clock.ONE_SECOND_IN_TS;\n  var MP2T_PACKET_LENGTH = 188,\n      // bytes\n  SYNC_BYTE = 0x47;\n  /**\n   * walks through segment data looking for pat and pmt packets to parse out\n   * program map table information\n   */\n\n  var parsePsi_ = function parsePsi_(bytes, pmt) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type;\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pat':\n            pmt.pid = probe.ts.parsePat(packet);\n            break;\n\n          case 'pmt':\n            var table = probe.ts.parsePmt(packet);\n            pmt.table = pmt.table || {};\n            Object.keys(table).forEach(function (key) {\n              pmt.table[key] = table[key];\n            });\n            break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last audio pes packets\n   */\n\n\n  var parseAudioPes_ = function parseAudioPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed;\n    var endLoop = false; // Start walking from start of segment to get first audio packet\n\n    while (endIndex <= bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last audio packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last video pes packets as well as timing information for the first\n   * key frame.\n   */\n\n\n  var parseVideoPes_ = function parseVideoPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed,\n        frame,\n        i,\n        pes;\n    var endLoop = false;\n    var currentFrame = {\n      data: [],\n      size: 0\n    }; // Start walking from start of segment to get first video packet\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video') {\n              if (pusi && !endLoop) {\n                parsed = probe.ts.parsePesTime(packet);\n\n                if (parsed) {\n                  parsed.type = 'video';\n                  result.video.push(parsed);\n                  endLoop = true;\n                }\n              }\n\n              if (!result.firstKeyFrame) {\n                if (pusi) {\n                  if (currentFrame.size !== 0) {\n                    frame = new Uint8Array(currentFrame.size);\n                    i = 0;\n\n                    while (currentFrame.data.length) {\n                      pes = currentFrame.data.shift();\n                      frame.set(pes, i);\n                      i += pes.byteLength;\n                    }\n\n                    if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n                      var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting\n                      // the keyframe seems to work fine with HLS playback\n                      // and definitely preferable to a crash with TypeError...\n\n                      if (firstKeyFrame) {\n                        result.firstKeyFrame = firstKeyFrame;\n                        result.firstKeyFrame.type = 'video';\n                      } else {\n                        // eslint-disable-next-line\n                        console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');\n                      }\n                    }\n\n                    currentFrame.size = 0;\n                  }\n                }\n\n                currentFrame.data.push(packet);\n                currentFrame.size += packet.byteLength;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop && result.firstKeyFrame) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last video packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * Adjusts the timestamp information for the segment to account for\n   * rollover and convert to seconds based on pes packet timescale (90khz clock)\n   */\n\n\n  var adjustTimestamp_ = function adjustTimestamp_(segmentInfo, baseTimestamp) {\n    if (segmentInfo.audio && segmentInfo.audio.length) {\n      var audioBaseTimestamp = baseTimestamp;\n\n      if (typeof audioBaseTimestamp === 'undefined' || isNaN(audioBaseTimestamp)) {\n        audioBaseTimestamp = segmentInfo.audio[0].dts;\n      }\n\n      segmentInfo.audio.forEach(function (info) {\n        info.dts = handleRollover(info.dts, audioBaseTimestamp);\n        info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n    }\n\n    if (segmentInfo.video && segmentInfo.video.length) {\n      var videoBaseTimestamp = baseTimestamp;\n\n      if (typeof videoBaseTimestamp === 'undefined' || isNaN(videoBaseTimestamp)) {\n        videoBaseTimestamp = segmentInfo.video[0].dts;\n      }\n\n      segmentInfo.video.forEach(function (info) {\n        info.dts = handleRollover(info.dts, videoBaseTimestamp);\n        info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n\n      if (segmentInfo.firstKeyFrame) {\n        var frame = segmentInfo.firstKeyFrame;\n        frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n        frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds\n\n        frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;\n        frame.ptsTime = frame.pts / ONE_SECOND_IN_TS;\n      }\n    }\n  };\n  /**\n   * inspects the aac data stream for start and end time information\n   */\n\n\n  var inspectAac_ = function inspectAac_(bytes) {\n    var endLoop = false,\n        audioCount = 0,\n        sampleRate = null,\n        timestamp = null,\n        frameSize = 0,\n        byteIndex = 0,\n        packet;\n\n    while (bytes.length - byteIndex >= 3) {\n      var type = probe.aac.parseType(bytes, byteIndex);\n\n      switch (type) {\n        case 'timed-metadata':\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (bytes.length - byteIndex < 10) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (timestamp === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            timestamp = probe.aac.parseAacTimestamp(packet);\n          }\n\n          byteIndex += frameSize;\n          break;\n\n        case 'audio':\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (bytes.length - byteIndex < 7) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (sampleRate === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            sampleRate = probe.aac.parseSampleRate(packet);\n          }\n\n          audioCount++;\n          byteIndex += frameSize;\n          break;\n\n        default:\n          byteIndex++;\n          break;\n      }\n\n      if (endLoop) {\n        return null;\n      }\n    }\n\n    if (sampleRate === null || timestamp === null) {\n      return null;\n    }\n\n    var audioTimescale = ONE_SECOND_IN_TS / sampleRate;\n    var result = {\n      audio: [{\n        type: 'audio',\n        dts: timestamp,\n        pts: timestamp\n      }, {\n        type: 'audio',\n        dts: timestamp + audioCount * 1024 * audioTimescale,\n        pts: timestamp + audioCount * 1024 * audioTimescale\n      }]\n    };\n    return result;\n  };\n  /**\n   * inspects the transport stream segment data for start and end time information\n   * of the audio and video tracks (when present) as well as the first key frame's\n   * start time.\n   */\n\n\n  var inspectTs_ = function inspectTs_(bytes) {\n    var pmt = {\n      pid: null,\n      table: null\n    };\n    var result = {};\n    parsePsi_(bytes, pmt);\n\n    for (var pid in pmt.table) {\n      if (pmt.table.hasOwnProperty(pid)) {\n        var type = pmt.table[pid];\n\n        switch (type) {\n          case streamTypes.H264_STREAM_TYPE:\n            result.video = [];\n            parseVideoPes_(bytes, pmt, result);\n\n            if (result.video.length === 0) {\n              delete result.video;\n            }\n\n            break;\n\n          case streamTypes.ADTS_STREAM_TYPE:\n            result.audio = [];\n            parseAudioPes_(bytes, pmt, result);\n\n            if (result.audio.length === 0) {\n              delete result.audio;\n            }\n\n            break;\n        }\n      }\n    }\n\n    return result;\n  };\n  /**\n   * Inspects segment byte data and returns an object with start and end timing information\n   *\n   * @param {Uint8Array} bytes The segment byte data\n   * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n   *  timestamps for rollover. This value must be in 90khz clock.\n   * @return {Object} Object containing start and end frame timing info of segment.\n   */\n\n\n  var inspect = function inspect(bytes, baseTimestamp) {\n    var isAacData = probe.aac.isLikelyAacData(bytes);\n    var result;\n\n    if (isAacData) {\n      result = inspectAac_(bytes);\n    } else {\n      result = inspectTs_(bytes);\n    }\n\n    if (!result || !result.audio && !result.video) {\n      return null;\n    }\n\n    adjustTimestamp_(result, baseTimestamp);\n    return result;\n  };\n\n  var tsInspector = {\n    inspect: inspect,\n    parseAudioPes_: parseAudioPes_\n  };\n  /* global self */\n\n  /**\n   * Re-emits transmuxer events by converting them into messages to the\n   * world outside the worker.\n   *\n   * @param {Object} transmuxer the transmuxer to wire events on\n   * @private\n   */\n\n  var wireTransmuxerEvents = function wireTransmuxerEvents(self, transmuxer) {\n    transmuxer.on('data', function (segment) {\n      // transfer ownership of the underlying ArrayBuffer\n      // instead of doing a copy to save memory\n      // ArrayBuffers are transferable but generic TypedArrays are not\n      // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n      var initArray = segment.initSegment;\n      segment.initSegment = {\n        data: initArray.buffer,\n        byteOffset: initArray.byteOffset,\n        byteLength: initArray.byteLength\n      };\n      var typedArray = segment.data;\n      segment.data = typedArray.buffer;\n      self.postMessage({\n        action: 'data',\n        segment: segment,\n        byteOffset: typedArray.byteOffset,\n        byteLength: typedArray.byteLength\n      }, [segment.data]);\n    });\n    transmuxer.on('done', function (data) {\n      self.postMessage({\n        action: 'done'\n      });\n    });\n    transmuxer.on('gopInfo', function (gopInfo) {\n      self.postMessage({\n        action: 'gopInfo',\n        gopInfo: gopInfo\n      });\n    });\n    transmuxer.on('videoSegmentTimingInfo', function (timingInfo) {\n      var videoSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        videoSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'videoSegmentTimingInfo',\n        videoSegmentTimingInfo: videoSegmentTimingInfo\n      });\n    });\n    transmuxer.on('audioSegmentTimingInfo', function (timingInfo) {\n      // Note that all times for [audio/video]SegmentTimingInfo events are in video clock\n      var audioSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        audioSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'audioSegmentTimingInfo',\n        audioSegmentTimingInfo: audioSegmentTimingInfo\n      });\n    });\n    transmuxer.on('id3Frame', function (id3Frame) {\n      self.postMessage({\n        action: 'id3Frame',\n        id3Frame: id3Frame\n      });\n    });\n    transmuxer.on('caption', function (caption) {\n      self.postMessage({\n        action: 'caption',\n        caption: caption\n      });\n    });\n    transmuxer.on('trackinfo', function (trackInfo) {\n      self.postMessage({\n        action: 'trackinfo',\n        trackInfo: trackInfo\n      });\n    });\n    transmuxer.on('audioTimingInfo', function (audioTimingInfo) {\n      // convert to video TS since we prioritize video time over audio\n      self.postMessage({\n        action: 'audioTimingInfo',\n        audioTimingInfo: {\n          start: clock.videoTsToSeconds(audioTimingInfo.start),\n          end: clock.videoTsToSeconds(audioTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('videoTimingInfo', function (videoTimingInfo) {\n      self.postMessage({\n        action: 'videoTimingInfo',\n        videoTimingInfo: {\n          start: clock.videoTsToSeconds(videoTimingInfo.start),\n          end: clock.videoTsToSeconds(videoTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('log', function (log) {\n      self.postMessage({\n        action: 'log',\n        log: log\n      });\n    });\n  };\n  /**\n   * All incoming messages route through this hash. If no function exists\n   * to handle an incoming message, then we ignore the message.\n   *\n   * @class MessageHandlers\n   * @param {Object} options the options to initialize with\n   */\n\n\n  var MessageHandlers = /*#__PURE__*/function () {\n    function MessageHandlers(self, options) {\n      this.options = options || {};\n      this.self = self;\n      this.init();\n    }\n    /**\n     * initialize our web worker and wire all the events.\n     */\n\n\n    var _proto = MessageHandlers.prototype;\n\n    _proto.init = function init() {\n      if (this.transmuxer) {\n        this.transmuxer.dispose();\n      }\n\n      this.transmuxer = new transmuxer.Transmuxer(this.options);\n      wireTransmuxerEvents(this.self, this.transmuxer);\n    };\n\n    _proto.pushMp4Captions = function pushMp4Captions(data) {\n      if (!this.captionParser) {\n        this.captionParser = new captionParser();\n        this.captionParser.init();\n      }\n\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      var parsed = this.captionParser.parse(segment, data.trackIds, data.timescales);\n      this.self.postMessage({\n        action: 'mp4Captions',\n        captions: parsed && parsed.captions || [],\n        logs: parsed && parsed.logs || [],\n        data: segment.buffer\n      }, [segment.buffer]);\n    };\n\n    _proto.probeMp4StartTime = function probeMp4StartTime(_ref) {\n      var timescales = _ref.timescales,\n          data = _ref.data;\n      var startTime = probe$2.startTime(timescales, data);\n      this.self.postMessage({\n        action: 'probeMp4StartTime',\n        startTime: startTime,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.probeMp4Tracks = function probeMp4Tracks(_ref2) {\n      var data = _ref2.data;\n      var tracks = probe$2.tracks(data);\n      this.self.postMessage({\n        action: 'probeMp4Tracks',\n        tracks: tracks,\n        data: data\n      }, [data.buffer]);\n    }\n    /**\n     * Probe an mpeg2-ts segment to determine the start time of the segment in it's\n     * internal \"media time,\" as well as whether it contains video and/or audio.\n     *\n     * @private\n     * @param {Uint8Array} bytes - segment bytes\n     * @param {number} baseStartTime\n     *        Relative reference timestamp used when adjusting frame timestamps for rollover.\n     *        This value should be in seconds, as it's converted to a 90khz clock within the\n     *        function body.\n     * @return {Object} The start time of the current segment in \"media time\" as well as\n     *                  whether it contains video and/or audio\n     */\n    ;\n\n    _proto.probeTs = function probeTs(_ref3) {\n      var data = _ref3.data,\n          baseStartTime = _ref3.baseStartTime;\n      var tsStartTime = typeof baseStartTime === 'number' && !isNaN(baseStartTime) ? baseStartTime * clock.ONE_SECOND_IN_TS : void 0;\n      var timeInfo = tsInspector.inspect(data, tsStartTime);\n      var result = null;\n\n      if (timeInfo) {\n        result = {\n          // each type's time info comes back as an array of 2 times, start and end\n          hasVideo: timeInfo.video && timeInfo.video.length === 2 || false,\n          hasAudio: timeInfo.audio && timeInfo.audio.length === 2 || false\n        };\n\n        if (result.hasVideo) {\n          result.videoStart = timeInfo.video[0].ptsTime;\n        }\n\n        if (result.hasAudio) {\n          result.audioStart = timeInfo.audio[0].ptsTime;\n        }\n      }\n\n      this.self.postMessage({\n        action: 'probeTs',\n        result: result,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.clearAllMp4Captions = function clearAllMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearAllCaptions();\n      }\n    };\n\n    _proto.clearParsedMp4Captions = function clearParsedMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearParsedCaptions();\n      }\n    }\n    /**\n     * Adds data (a ts segment) to the start of the transmuxer pipeline for\n     * processing.\n     *\n     * @param {ArrayBuffer} data data to push into the muxer\n     */\n    ;\n\n    _proto.push = function push(data) {\n      // Cast array buffer to correct type for transmuxer\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      this.transmuxer.push(segment);\n    }\n    /**\n     * Recreate the transmuxer so that the next segment added via `push`\n     * start with a fresh transmuxer.\n     */\n    ;\n\n    _proto.reset = function reset() {\n      this.transmuxer.reset();\n    }\n    /**\n     * Set the value that will be used as the `baseMediaDecodeTime` time for the\n     * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n     * set relative to the first based on the PTS values.\n     *\n     * @param {Object} data used to set the timestamp offset in the muxer\n     */\n    ;\n\n    _proto.setTimestampOffset = function setTimestampOffset(data) {\n      var timestampOffset = data.timestampOffset || 0;\n      this.transmuxer.setBaseMediaDecodeTime(Math.round(clock.secondsToVideoTs(timestampOffset)));\n    };\n\n    _proto.setAudioAppendStart = function setAudioAppendStart(data) {\n      this.transmuxer.setAudioAppendStart(Math.ceil(clock.secondsToVideoTs(data.appendStart)));\n    };\n\n    _proto.setRemux = function setRemux(data) {\n      this.transmuxer.setRemux(data.remux);\n    }\n    /**\n     * Forces the pipeline to finish processing the last segment and emit it's\n     * results.\n     *\n     * @param {Object} data event data, not really used\n     */\n    ;\n\n    _proto.flush = function flush(data) {\n      this.transmuxer.flush(); // transmuxed done action is fired after both audio/video pipelines are flushed\n\n      self.postMessage({\n        action: 'done',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.endTimeline = function endTimeline() {\n      this.transmuxer.endTimeline(); // transmuxed endedtimeline action is fired after both audio/video pipelines end their\n      // timelines\n\n      self.postMessage({\n        action: 'endedtimeline',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.alignGopsWith = function alignGopsWith(data) {\n      this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n    };\n\n    return MessageHandlers;\n  }();\n  /**\n   * Our web worker interface so that things can talk to mux.js\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   *\n   * @param {Object} self the scope for the web worker\n   */\n\n\n  self.onmessage = function (event) {\n    if (event.data.action === 'init' && event.data.options) {\n      this.messageHandlers = new MessageHandlers(self, event.data.options);\n      return;\n    }\n\n    if (!this.messageHandlers) {\n      this.messageHandlers = new MessageHandlers(self);\n    }\n\n    if (event.data && event.data.action && event.data.action !== 'init') {\n      if (this.messageHandlers[event.data.action]) {\n        this.messageHandlers[event.data.action](event.data);\n      }\n    }\n  };\n}));\nvar TransmuxWorker = factory(workerCode$1);\n/* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n\nvar handleData_ = function handleData_(event, transmuxedData, callback) {\n  var _event$data$segment = event.data.segment,\n      type = _event$data$segment.type,\n      initSegment = _event$data$segment.initSegment,\n      captions = _event$data$segment.captions,\n      captionStreams = _event$data$segment.captionStreams,\n      metadata = _event$data$segment.metadata,\n      videoFrameDtsTime = _event$data$segment.videoFrameDtsTime,\n      videoFramePtsTime = _event$data$segment.videoFramePtsTime;\n  transmuxedData.buffer.push({\n    captions: captions,\n    captionStreams: captionStreams,\n    metadata: metadata\n  });\n  var boxes = event.data.segment.boxes || {\n    data: event.data.segment.data\n  };\n  var result = {\n    type: type,\n    // cast ArrayBuffer to TypedArray\n    data: new Uint8Array(boxes.data, boxes.data.byteOffset, boxes.data.byteLength),\n    initSegment: new Uint8Array(initSegment.data, initSegment.byteOffset, initSegment.byteLength)\n  };\n\n  if (typeof videoFrameDtsTime !== 'undefined') {\n    result.videoFrameDtsTime = videoFrameDtsTime;\n  }\n\n  if (typeof videoFramePtsTime !== 'undefined') {\n    result.videoFramePtsTime = videoFramePtsTime;\n  }\n\n  callback(result);\n};\nvar handleDone_ = function handleDone_(_ref) {\n  var transmuxedData = _ref.transmuxedData,\n      callback = _ref.callback;\n  // Previously we only returned data on data events,\n  // not on done events. Clear out the buffer to keep that consistent.\n  transmuxedData.buffer = []; // all buffers should have been flushed from the muxer, so start processing anything we\n  // have received\n\n  callback(transmuxedData);\n};\nvar handleGopInfo_ = function handleGopInfo_(event, transmuxedData) {\n  transmuxedData.gopInfo = event.data.gopInfo;\n};\nvar processTransmux = function processTransmux(options) {\n  var transmuxer = options.transmuxer,\n      bytes = options.bytes,\n      audioAppendStart = options.audioAppendStart,\n      gopsToAlignWith = options.gopsToAlignWith,\n      remux = options.remux,\n      onData = options.onData,\n      onTrackInfo = options.onTrackInfo,\n      onAudioTimingInfo = options.onAudioTimingInfo,\n      onVideoTimingInfo = options.onVideoTimingInfo,\n      onVideoSegmentTimingInfo = options.onVideoSegmentTimingInfo,\n      onAudioSegmentTimingInfo = options.onAudioSegmentTimingInfo,\n      onId3 = options.onId3,\n      onCaptions = options.onCaptions,\n      onDone = options.onDone,\n      onEndedTimeline = options.onEndedTimeline,\n      onTransmuxerLog = options.onTransmuxerLog,\n      isEndOfTimeline = options.isEndOfTimeline;\n  var transmuxedData = {\n    buffer: []\n  };\n  var waitForEndedTimelineEvent = isEndOfTimeline;\n\n  var handleMessage = function handleMessage(event) {\n    if (transmuxer.currentTransmux !== options) {\n      // disposed\n      return;\n    }\n\n    if (event.data.action === 'data') {\n      handleData_(event, transmuxedData, onData);\n    }\n\n    if (event.data.action === 'trackinfo') {\n      onTrackInfo(event.data.trackInfo);\n    }\n\n    if (event.data.action === 'gopInfo') {\n      handleGopInfo_(event, transmuxedData);\n    }\n\n    if (event.data.action === 'audioTimingInfo') {\n      onAudioTimingInfo(event.data.audioTimingInfo);\n    }\n\n    if (event.data.action === 'videoTimingInfo') {\n      onVideoTimingInfo(event.data.videoTimingInfo);\n    }\n\n    if (event.data.action === 'videoSegmentTimingInfo') {\n      onVideoSegmentTimingInfo(event.data.videoSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'audioSegmentTimingInfo') {\n      onAudioSegmentTimingInfo(event.data.audioSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'id3Frame') {\n      onId3([event.data.id3Frame], event.data.id3Frame.dispatchType);\n    }\n\n    if (event.data.action === 'caption') {\n      onCaptions(event.data.caption);\n    }\n\n    if (event.data.action === 'endedtimeline') {\n      waitForEndedTimelineEvent = false;\n      onEndedTimeline();\n    }\n\n    if (event.data.action === 'log') {\n      onTransmuxerLog(event.data.log);\n    } // wait for the transmuxed event since we may have audio and video\n\n\n    if (event.data.type !== 'transmuxed') {\n      return;\n    } // If the \"endedtimeline\" event has not yet fired, and this segment represents the end\n    // of a timeline, that means there may still be data events before the segment\n    // processing can be considerred complete. In that case, the final event should be\n    // an \"endedtimeline\" event with the type \"transmuxed.\"\n\n\n    if (waitForEndedTimelineEvent) {\n      return;\n    }\n\n    transmuxer.onmessage = null;\n    handleDone_({\n      transmuxedData: transmuxedData,\n      callback: onDone\n    });\n    /* eslint-disable no-use-before-define */\n\n    dequeue(transmuxer);\n    /* eslint-enable */\n  };\n\n  transmuxer.onmessage = handleMessage;\n\n  if (audioAppendStart) {\n    transmuxer.postMessage({\n      action: 'setAudioAppendStart',\n      appendStart: audioAppendStart\n    });\n  } // allow empty arrays to be passed to clear out GOPs\n\n\n  if (Array.isArray(gopsToAlignWith)) {\n    transmuxer.postMessage({\n      action: 'alignGopsWith',\n      gopsToAlignWith: gopsToAlignWith\n    });\n  }\n\n  if (typeof remux !== 'undefined') {\n    transmuxer.postMessage({\n      action: 'setRemux',\n      remux: remux\n    });\n  }\n\n  if (bytes.byteLength) {\n    var buffer = bytes instanceof ArrayBuffer ? bytes : bytes.buffer;\n    var byteOffset = bytes instanceof ArrayBuffer ? 0 : bytes.byteOffset;\n    transmuxer.postMessage({\n      action: 'push',\n      // Send the typed-array of data as an ArrayBuffer so that\n      // it can be sent as a \"Transferable\" and avoid the costly\n      // memory copy\n      data: buffer,\n      // To recreate the original typed-array, we need information\n      // about what portion of the ArrayBuffer it was a view into\n      byteOffset: byteOffset,\n      byteLength: bytes.byteLength\n    }, [buffer]);\n  }\n\n  if (isEndOfTimeline) {\n    transmuxer.postMessage({\n      action: 'endTimeline'\n    });\n  } // even if we didn't push any bytes, we have to make sure we flush in case we reached\n  // the end of the segment\n\n\n  transmuxer.postMessage({\n    action: 'flush'\n  });\n};\nvar dequeue = function dequeue(transmuxer) {\n  transmuxer.currentTransmux = null;\n\n  if (transmuxer.transmuxQueue.length) {\n    transmuxer.currentTransmux = transmuxer.transmuxQueue.shift();\n\n    if (typeof transmuxer.currentTransmux === 'function') {\n      transmuxer.currentTransmux();\n    } else {\n      processTransmux(transmuxer.currentTransmux);\n    }\n  }\n};\nvar processAction = function processAction(transmuxer, action) {\n  transmuxer.postMessage({\n    action: action\n  });\n  dequeue(transmuxer);\n};\nvar enqueueAction = function enqueueAction(action, transmuxer) {\n  if (!transmuxer.currentTransmux) {\n    transmuxer.currentTransmux = action;\n    processAction(transmuxer, action);\n    return;\n  }\n\n  transmuxer.transmuxQueue.push(processAction.bind(null, transmuxer, action));\n};\nvar reset = function reset(transmuxer) {\n  enqueueAction('reset', transmuxer);\n};\nvar endTimeline = function endTimeline(transmuxer) {\n  enqueueAction('endTimeline', transmuxer);\n};\nvar transmux = function transmux(options) {\n  if (!options.transmuxer.currentTransmux) {\n    options.transmuxer.currentTransmux = options;\n    processTransmux(options);\n    return;\n  }\n\n  options.transmuxer.transmuxQueue.push(options);\n};\nvar createTransmuxer = function createTransmuxer(options) {\n  var transmuxer = new TransmuxWorker();\n  transmuxer.currentTransmux = null;\n  transmuxer.transmuxQueue = [];\n  var term = transmuxer.terminate;\n\n  transmuxer.terminate = function () {\n    transmuxer.currentTransmux = null;\n    transmuxer.transmuxQueue.length = 0;\n    return term.call(transmuxer);\n  };\n\n  transmuxer.postMessage({\n    action: 'init',\n    options: options\n  });\n  return transmuxer;\n};\nvar segmentTransmuxer = {\n  reset: reset,\n  endTimeline: endTimeline,\n  transmux: transmux,\n  createTransmuxer: createTransmuxer\n};\n\nvar workerCallback = function workerCallback(options) {\n  var transmuxer = options.transmuxer;\n  var endAction = options.endAction || options.action;\n  var callback = options.callback;\n\n  var message = _extends({}, options, {\n    endAction: null,\n    transmuxer: null,\n    callback: null\n  });\n\n  var listenForEndEvent = function listenForEndEvent(event) {\n    if (event.data.action !== endAction) {\n      return;\n    }\n\n    transmuxer.removeEventListener('message', listenForEndEvent); // transfer ownership of bytes back to us.\n\n    if (event.data.data) {\n      event.data.data = new Uint8Array(event.data.data, options.byteOffset || 0, options.byteLength || event.data.data.byteLength);\n\n      if (options.data) {\n        options.data = event.data.data;\n      }\n    }\n\n    callback(event.data);\n  };\n\n  transmuxer.addEventListener('message', listenForEndEvent);\n\n  if (options.data) {\n    var isArrayBuffer = options.data instanceof ArrayBuffer;\n    message.byteOffset = isArrayBuffer ? 0 : options.data.byteOffset;\n    message.byteLength = options.data.byteLength;\n    var transfers = [isArrayBuffer ? options.data : options.data.buffer];\n    transmuxer.postMessage(message, transfers);\n  } else {\n    transmuxer.postMessage(message);\n  }\n};\n\nvar REQUEST_ERRORS = {\n  FAILURE: 2,\n  TIMEOUT: -101,\n  ABORTED: -102\n};\n/**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\n\nvar abortAll = function abortAll(activeXhrs) {\n  activeXhrs.forEach(function (xhr) {\n    xhr.abort();\n  });\n};\n/**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\n\n\nvar getRequestStats = function getRequestStats(request) {\n  return {\n    bandwidth: request.bandwidth,\n    bytesReceived: request.bytesReceived || 0,\n    roundTripTime: request.roundTripTime || 0\n  };\n};\n/**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\n\n\nvar getProgressStats = function getProgressStats(progressEvent) {\n  var request = progressEvent.target;\n  var roundTripTime = Date.now() - request.requestTime;\n  var stats = {\n    bandwidth: Infinity,\n    bytesReceived: 0,\n    roundTripTime: roundTripTime || 0\n  };\n  stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n  // because we should only use bandwidth stats on progress to determine when\n  // abort a request early due to insufficient bandwidth\n\n  stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n  return stats;\n};\n/**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request -  the XHR request that possibly generated the error\n */\n\n\nvar handleErrors = function handleErrors(error, request) {\n  if (request.timedout) {\n    return {\n      status: request.status,\n      message: 'HLS request timed-out at URL: ' + request.uri,\n      code: REQUEST_ERRORS.TIMEOUT,\n      xhr: request\n    };\n  }\n\n  if (request.aborted) {\n    return {\n      status: request.status,\n      message: 'HLS request aborted at URL: ' + request.uri,\n      code: REQUEST_ERRORS.ABORTED,\n      xhr: request\n    };\n  }\n\n  if (error) {\n    return {\n      status: request.status,\n      message: 'HLS request errored at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  if (request.responseType === 'arraybuffer' && request.response.byteLength === 0) {\n    return {\n      status: request.status,\n      message: 'Empty HLS response at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  return null;\n};\n/**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Array} objects - objects to add the key bytes to.\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleKeyResponse = function handleKeyResponse(segment, objects, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    if (response.byteLength !== 16) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Invalid HLS key at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    var view = new DataView(response);\n    var bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n\n    for (var i = 0; i < objects.length; i++) {\n      objects[i].bytes = bytes;\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar parseInitSegment = function parseInitSegment(segment, _callback) {\n  var type = detectContainerForBytes(segment.map.bytes); // TODO: We should also handle ts init segments here, but we\n  // only know how to parse mp4 init segments at the moment\n\n  if (type !== 'mp4') {\n    var uri = segment.map.resolvedUri || segment.map.uri;\n    return _callback({\n      internal: true,\n      message: \"Found unsupported \" + (type || 'unknown') + \" container for initialization segment at URL: \" + uri,\n      code: REQUEST_ERRORS.FAILURE\n    });\n  }\n\n  workerCallback({\n    action: 'probeMp4Tracks',\n    data: segment.map.bytes,\n    transmuxer: segment.transmuxer,\n    callback: function callback(_ref) {\n      var tracks = _ref.tracks,\n          data = _ref.data;\n      // transfer bytes back to us\n      segment.map.bytes = data;\n      tracks.forEach(function (track) {\n        segment.map.tracks = segment.map.tracks || {}; // only support one track of each type for now\n\n        if (segment.map.tracks[track.type]) {\n          return;\n        }\n\n        segment.map.tracks[track.type] = track;\n\n        if (typeof track.id === 'number' && track.timescale) {\n          segment.map.timescales = segment.map.timescales || {};\n          segment.map.timescales[track.id] = track.timescale;\n        }\n      });\n      return _callback(null);\n    }\n  });\n};\n/**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleInitSegmentResponse = function handleInitSegmentResponse(_ref2) {\n  var segment = _ref2.segment,\n      finishProcessingFn = _ref2.finishProcessingFn;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var bytes = new Uint8Array(request.response); // init segment is encypted, we will have to wait\n    // until the key request is done to decrypt.\n\n    if (segment.map.key) {\n      segment.map.encryptedBytes = bytes;\n      return finishProcessingFn(null, segment);\n    }\n\n    segment.map.bytes = bytes;\n    parseInitSegment(segment, function (parseError) {\n      if (parseError) {\n        parseError.xhr = request;\n        parseError.status = request.status;\n        return finishProcessingFn(parseError, segment);\n      }\n\n      finishProcessingFn(null, segment);\n    });\n  };\n};\n/**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleSegmentResponse = function handleSegmentResponse(_ref3) {\n  var segment = _ref3.segment,\n      finishProcessingFn = _ref3.finishProcessingFn,\n      responseType = _ref3.responseType;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var newBytes = // although responseText \"should\" exist, this guard serves to prevent an error being\n    // thrown for two primary cases:\n    // 1. the mime type override stops working, or is not implemented for a specific\n    //    browser\n    // 2. when using mock XHR libraries like sinon that do not allow the override behavior\n    responseType === 'arraybuffer' || !request.responseText ? request.response : stringToArrayBuffer(request.responseText.substring(segment.lastReachedChar || 0));\n    segment.stats = getRequestStats(request);\n\n    if (segment.key) {\n      segment.encryptedBytes = new Uint8Array(newBytes);\n    } else {\n      segment.bytes = new Uint8Array(newBytes);\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar transmuxAndNotify = function transmuxAndNotify(_ref4) {\n  var segment = _ref4.segment,\n      bytes = _ref4.bytes,\n      trackInfoFn = _ref4.trackInfoFn,\n      timingInfoFn = _ref4.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref4.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref4.audioSegmentTimingInfoFn,\n      id3Fn = _ref4.id3Fn,\n      captionsFn = _ref4.captionsFn,\n      isEndOfTimeline = _ref4.isEndOfTimeline,\n      endedTimelineFn = _ref4.endedTimelineFn,\n      dataFn = _ref4.dataFn,\n      doneFn = _ref4.doneFn,\n      onTransmuxerLog = _ref4.onTransmuxerLog;\n  var fmp4Tracks = segment.map && segment.map.tracks || {};\n  var isMuxed = Boolean(fmp4Tracks.audio && fmp4Tracks.video); // Keep references to each function so we can null them out after we're done with them.\n  // One reason for this is that in the case of full segments, we want to trust start\n  // times from the probe, rather than the transmuxer.\n\n  var audioStartFn = timingInfoFn.bind(null, segment, 'audio', 'start');\n  var audioEndFn = timingInfoFn.bind(null, segment, 'audio', 'end');\n  var videoStartFn = timingInfoFn.bind(null, segment, 'video', 'start');\n  var videoEndFn = timingInfoFn.bind(null, segment, 'video', 'end');\n\n  var finish = function finish() {\n    return transmux({\n      bytes: bytes,\n      transmuxer: segment.transmuxer,\n      audioAppendStart: segment.audioAppendStart,\n      gopsToAlignWith: segment.gopsToAlignWith,\n      remux: isMuxed,\n      onData: function onData(result) {\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        dataFn(segment, result);\n      },\n      onTrackInfo: function onTrackInfo(trackInfo) {\n        if (trackInfoFn) {\n          if (isMuxed) {\n            trackInfo.isMuxed = true;\n          }\n\n          trackInfoFn(segment, trackInfo);\n        }\n      },\n      onAudioTimingInfo: function onAudioTimingInfo(audioTimingInfo) {\n        // we only want the first start value we encounter\n        if (audioStartFn && typeof audioTimingInfo.start !== 'undefined') {\n          audioStartFn(audioTimingInfo.start);\n          audioStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (audioEndFn && typeof audioTimingInfo.end !== 'undefined') {\n          audioEndFn(audioTimingInfo.end);\n        }\n      },\n      onVideoTimingInfo: function onVideoTimingInfo(videoTimingInfo) {\n        // we only want the first start value we encounter\n        if (videoStartFn && typeof videoTimingInfo.start !== 'undefined') {\n          videoStartFn(videoTimingInfo.start);\n          videoStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (videoEndFn && typeof videoTimingInfo.end !== 'undefined') {\n          videoEndFn(videoTimingInfo.end);\n        }\n      },\n      onVideoSegmentTimingInfo: function onVideoSegmentTimingInfo(videoSegmentTimingInfo) {\n        videoSegmentTimingInfoFn(videoSegmentTimingInfo);\n      },\n      onAudioSegmentTimingInfo: function onAudioSegmentTimingInfo(audioSegmentTimingInfo) {\n        audioSegmentTimingInfoFn(audioSegmentTimingInfo);\n      },\n      onId3: function onId3(id3Frames, dispatchType) {\n        id3Fn(segment, id3Frames, dispatchType);\n      },\n      onCaptions: function onCaptions(captions) {\n        captionsFn(segment, [captions]);\n      },\n      isEndOfTimeline: isEndOfTimeline,\n      onEndedTimeline: function onEndedTimeline() {\n        endedTimelineFn();\n      },\n      onTransmuxerLog: onTransmuxerLog,\n      onDone: function onDone(result) {\n        if (!doneFn) {\n          return;\n        }\n\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        doneFn(null, segment, result);\n      }\n    });\n  }; // In the transmuxer, we don't yet have the ability to extract a \"proper\" start time.\n  // Meaning cached frame data may corrupt our notion of where this segment\n  // really starts. To get around this, probe for the info needed.\n\n\n  workerCallback({\n    action: 'probeTs',\n    transmuxer: segment.transmuxer,\n    data: bytes,\n    baseStartTime: segment.baseStartTime,\n    callback: function callback(data) {\n      segment.bytes = bytes = data.data;\n      var probeResult = data.result;\n\n      if (probeResult) {\n        trackInfoFn(segment, {\n          hasAudio: probeResult.hasAudio,\n          hasVideo: probeResult.hasVideo,\n          isMuxed: isMuxed\n        });\n        trackInfoFn = null;\n\n        if (probeResult.hasAudio && !isMuxed) {\n          audioStartFn(probeResult.audioStart);\n        }\n\n        if (probeResult.hasVideo) {\n          videoStartFn(probeResult.videoStart);\n        }\n\n        audioStartFn = null;\n        videoStartFn = null;\n      }\n\n      finish();\n    }\n  });\n};\n\nvar handleSegmentBytes = function handleSegmentBytes(_ref5) {\n  var segment = _ref5.segment,\n      bytes = _ref5.bytes,\n      trackInfoFn = _ref5.trackInfoFn,\n      timingInfoFn = _ref5.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref5.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref5.audioSegmentTimingInfoFn,\n      id3Fn = _ref5.id3Fn,\n      captionsFn = _ref5.captionsFn,\n      isEndOfTimeline = _ref5.isEndOfTimeline,\n      endedTimelineFn = _ref5.endedTimelineFn,\n      dataFn = _ref5.dataFn,\n      doneFn = _ref5.doneFn,\n      onTransmuxerLog = _ref5.onTransmuxerLog;\n  var bytesAsUint8Array = new Uint8Array(bytes); // TODO:\n  // We should have a handler that fetches the number of bytes required\n  // to check if something is fmp4. This will allow us to save bandwidth\n  // because we can only blacklist a playlist and abort requests\n  // by codec after trackinfo triggers.\n\n  if (isLikelyFmp4MediaSegment(bytesAsUint8Array)) {\n    segment.isFmp4 = true;\n    var tracks = segment.map.tracks;\n    var trackInfo = {\n      isFmp4: true,\n      hasVideo: !!tracks.video,\n      hasAudio: !!tracks.audio\n    }; // if we have a audio track, with a codec that is not set to\n    // encrypted audio\n\n    if (tracks.audio && tracks.audio.codec && tracks.audio.codec !== 'enca') {\n      trackInfo.audioCodec = tracks.audio.codec;\n    } // if we have a video track, with a codec that is not set to\n    // encrypted video\n\n\n    if (tracks.video && tracks.video.codec && tracks.video.codec !== 'encv') {\n      trackInfo.videoCodec = tracks.video.codec;\n    }\n\n    if (tracks.video && tracks.audio) {\n      trackInfo.isMuxed = true;\n    } // since we don't support appending fmp4 data on progress, we know we have the full\n    // segment here\n\n\n    trackInfoFn(segment, trackInfo); // The probe doesn't provide the segment end time, so only callback with the start\n    // time. The end time can be roughly calculated by the receiver using the duration.\n    //\n    // Note that the start time returned by the probe reflects the baseMediaDecodeTime, as\n    // that is the true start of the segment (where the playback engine should begin\n    // decoding).\n\n    var finishLoading = function finishLoading(captions) {\n      // if the track still has audio at this point it is only possible\n      // for it to be audio only. See `tracks.video && tracks.audio` if statement\n      // above.\n      // we make sure to use segment.bytes here as that\n      dataFn(segment, {\n        data: bytesAsUint8Array,\n        type: trackInfo.hasAudio && !trackInfo.isMuxed ? 'audio' : 'video'\n      });\n\n      if (captions && captions.length) {\n        captionsFn(segment, captions);\n      }\n\n      doneFn(null, segment, {});\n    };\n\n    workerCallback({\n      action: 'probeMp4StartTime',\n      timescales: segment.map.timescales,\n      data: bytesAsUint8Array,\n      transmuxer: segment.transmuxer,\n      callback: function callback(_ref6) {\n        var data = _ref6.data,\n            startTime = _ref6.startTime;\n        // transfer bytes back to us\n        bytes = data.buffer;\n        segment.bytes = bytesAsUint8Array = data;\n\n        if (trackInfo.hasAudio && !trackInfo.isMuxed) {\n          timingInfoFn(segment, 'audio', 'start', startTime);\n        }\n\n        if (trackInfo.hasVideo) {\n          timingInfoFn(segment, 'video', 'start', startTime);\n        } // Run through the CaptionParser in case there are captions.\n        // Initialize CaptionParser if it hasn't been yet\n\n\n        if (!tracks.video || !data.byteLength || !segment.transmuxer) {\n          finishLoading();\n          return;\n        }\n\n        workerCallback({\n          action: 'pushMp4Captions',\n          endAction: 'mp4Captions',\n          transmuxer: segment.transmuxer,\n          data: bytesAsUint8Array,\n          timescales: segment.map.timescales,\n          trackIds: [tracks.video.id],\n          callback: function callback(message) {\n            // transfer bytes back to us\n            bytes = message.data.buffer;\n            segment.bytes = bytesAsUint8Array = message.data;\n            message.logs.forEach(function (log) {\n              onTransmuxerLog(videojs.mergeOptions(log, {\n                stream: 'mp4CaptionParser'\n              }));\n            });\n            finishLoading(message.captions);\n          }\n        });\n      }\n    });\n    return;\n  } // VTT or other segments that don't need processing\n\n\n  if (!segment.transmuxer) {\n    doneFn(null, segment, {});\n    return;\n  }\n\n  if (typeof segment.container === 'undefined') {\n    segment.container = detectContainerForBytes(bytesAsUint8Array);\n  }\n\n  if (segment.container !== 'ts' && segment.container !== 'aac') {\n    trackInfoFn(segment, {\n      hasAudio: false,\n      hasVideo: false\n    });\n    doneFn(null, segment, {});\n    return;\n  } // ts or aac\n\n\n  transmuxAndNotify({\n    segment: segment,\n    bytes: bytes,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  });\n};\n\nvar decrypt = function decrypt(_ref7, callback) {\n  var id = _ref7.id,\n      key = _ref7.key,\n      encryptedBytes = _ref7.encryptedBytes,\n      decryptionWorker = _ref7.decryptionWorker;\n\n  var decryptionHandler = function decryptionHandler(event) {\n    if (event.data.source === id) {\n      decryptionWorker.removeEventListener('message', decryptionHandler);\n      var decrypted = event.data.decrypted;\n      callback(new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength));\n    }\n  };\n\n  decryptionWorker.addEventListener('message', decryptionHandler);\n  var keyBytes;\n\n  if (key.bytes.slice) {\n    keyBytes = key.bytes.slice();\n  } else {\n    keyBytes = new Uint32Array(Array.prototype.slice.call(key.bytes));\n  } // incrementally decrypt the bytes\n\n\n  decryptionWorker.postMessage(createTransferableMessage({\n    source: id,\n    encrypted: encryptedBytes,\n    key: keyBytes,\n    iv: key.iv\n  }), [encryptedBytes.buffer, keyBytes.buffer]);\n};\n/**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\n\n\nvar decryptSegment = function decryptSegment(_ref8) {\n  var decryptionWorker = _ref8.decryptionWorker,\n      segment = _ref8.segment,\n      trackInfoFn = _ref8.trackInfoFn,\n      timingInfoFn = _ref8.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref8.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref8.audioSegmentTimingInfoFn,\n      id3Fn = _ref8.id3Fn,\n      captionsFn = _ref8.captionsFn,\n      isEndOfTimeline = _ref8.isEndOfTimeline,\n      endedTimelineFn = _ref8.endedTimelineFn,\n      dataFn = _ref8.dataFn,\n      doneFn = _ref8.doneFn,\n      onTransmuxerLog = _ref8.onTransmuxerLog;\n  decrypt({\n    id: segment.requestId,\n    key: segment.key,\n    encryptedBytes: segment.encryptedBytes,\n    decryptionWorker: decryptionWorker\n  }, function (decryptedBytes) {\n    segment.bytes = decryptedBytes;\n    handleSegmentBytes({\n      segment: segment,\n      bytes: segment.bytes,\n      trackInfoFn: trackInfoFn,\n      timingInfoFn: timingInfoFn,\n      videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n      id3Fn: id3Fn,\n      captionsFn: captionsFn,\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: endedTimelineFn,\n      dataFn: dataFn,\n      doneFn: doneFn,\n      onTransmuxerLog: onTransmuxerLog\n    });\n  });\n};\n/**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after all resources have been\n *                            downloaded and any decryption completed\n */\n\n\nvar waitForCompletion = function waitForCompletion(_ref9) {\n  var activeXhrs = _ref9.activeXhrs,\n      decryptionWorker = _ref9.decryptionWorker,\n      trackInfoFn = _ref9.trackInfoFn,\n      timingInfoFn = _ref9.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref9.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref9.audioSegmentTimingInfoFn,\n      id3Fn = _ref9.id3Fn,\n      captionsFn = _ref9.captionsFn,\n      isEndOfTimeline = _ref9.isEndOfTimeline,\n      endedTimelineFn = _ref9.endedTimelineFn,\n      dataFn = _ref9.dataFn,\n      doneFn = _ref9.doneFn,\n      onTransmuxerLog = _ref9.onTransmuxerLog;\n  var count = 0;\n  var didError = false;\n  return function (error, segment) {\n    if (didError) {\n      return;\n    }\n\n    if (error) {\n      didError = true; // If there are errors, we have to abort any outstanding requests\n\n      abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we\n      // handle the aborted events from those requests, there are some cases where we may\n      // never get an aborted event. For instance, if the network connection is lost and\n      // there were two requests, the first may have triggered an error immediately, while\n      // the second request remains unsent. In that case, the aborted algorithm will not\n      // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method\n      //\n      // We also can't rely on the ready state of the XHR, since the request that\n      // triggered the connection error may also show as a ready state of 0 (unsent).\n      // Therefore, we have to finish this group of requests immediately after the first\n      // seen error.\n\n      return doneFn(error, segment);\n    }\n\n    count += 1;\n\n    if (count === activeXhrs.length) {\n      var segmentFinish = function segmentFinish() {\n        if (segment.encryptedBytes) {\n          return decryptSegment({\n            decryptionWorker: decryptionWorker,\n            segment: segment,\n            trackInfoFn: trackInfoFn,\n            timingInfoFn: timingInfoFn,\n            videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n            audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n            id3Fn: id3Fn,\n            captionsFn: captionsFn,\n            isEndOfTimeline: isEndOfTimeline,\n            endedTimelineFn: endedTimelineFn,\n            dataFn: dataFn,\n            doneFn: doneFn,\n            onTransmuxerLog: onTransmuxerLog\n          });\n        } // Otherwise, everything is ready just continue\n\n\n        handleSegmentBytes({\n          segment: segment,\n          bytes: segment.bytes,\n          trackInfoFn: trackInfoFn,\n          timingInfoFn: timingInfoFn,\n          videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n          audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n          id3Fn: id3Fn,\n          captionsFn: captionsFn,\n          isEndOfTimeline: isEndOfTimeline,\n          endedTimelineFn: endedTimelineFn,\n          dataFn: dataFn,\n          doneFn: doneFn,\n          onTransmuxerLog: onTransmuxerLog\n        });\n      }; // Keep track of when *all* of the requests have completed\n\n\n      segment.endOfAllRequests = Date.now();\n\n      if (segment.map && segment.map.encryptedBytes && !segment.map.bytes) {\n        return decrypt({\n          decryptionWorker: decryptionWorker,\n          // add -init to the \"id\" to differentiate between segment\n          // and init segment decryption, just in case they happen\n          // at the same time at some point in the future.\n          id: segment.requestId + '-init',\n          encryptedBytes: segment.map.encryptedBytes,\n          key: segment.map.key\n        }, function (decryptedBytes) {\n          segment.map.bytes = decryptedBytes;\n          parseInitSegment(segment, function (parseError) {\n            if (parseError) {\n              abortAll(activeXhrs);\n              return doneFn(parseError, segment);\n            }\n\n            segmentFinish();\n          });\n        });\n      }\n\n      segmentFinish();\n    }\n  };\n};\n/**\n * Calls the abort callback if any request within the batch was aborted. Will only call\n * the callback once per batch of requests, even if multiple were aborted.\n *\n * @param {Object} loadendState - state to check to see if the abort function was called\n * @param {Function} abortFn - callback to call for abort\n */\n\n\nvar handleLoadEnd = function handleLoadEnd(_ref10) {\n  var loadendState = _ref10.loadendState,\n      abortFn = _ref10.abortFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted && abortFn && !loadendState.calledAbortFn) {\n      abortFn();\n      loadendState.calledAbortFn = true;\n    }\n  };\n};\n/**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n *                                is received\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\n\n\nvar handleProgress = function handleProgress(_ref11) {\n  var segment = _ref11.segment,\n      progressFn = _ref11.progressFn;\n      _ref11.trackInfoFn;\n      _ref11.timingInfoFn;\n      _ref11.videoSegmentTimingInfoFn;\n      _ref11.audioSegmentTimingInfoFn;\n      _ref11.id3Fn;\n      _ref11.captionsFn;\n      _ref11.isEndOfTimeline;\n      _ref11.endedTimelineFn;\n      _ref11.dataFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted) {\n      return;\n    }\n\n    segment.stats = videojs.mergeOptions(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data\n\n    if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n      segment.stats.firstBytesReceivedAt = Date.now();\n    }\n\n    return progressFn(event, segment);\n  };\n};\n/**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n *   decrypts the media-segment if it has a key uri and an iv\n *   aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n *   resolvedUri: String,\n *   [transmuxer]: Object,\n *   [byterange]: {\n *     offset: Number,\n *     length: Number\n *   },\n *   [key]: {\n *     resolvedUri: String\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     iv: {\n *       bytes: Uint32Array\n *     }\n *   },\n *   [map]: {\n *     resolvedUri: String,\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     [bytes]: Uint8Array\n *   }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n *                                       decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} abortFn - a callback called (only once) if any piece of a request was\n *                             aborted\n * @param {Function} progressFn - a callback that receives progress events from the main\n *                                segment's xhr request\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that receives data from the main segment's xhr\n *                            request, transmuxed if needed\n * @param {Function} doneFn - a callback that is executed only once all requests have\n *                            succeeded or failed\n * @return {Function} a function that, when invoked, immediately aborts all\n *                     outstanding requests\n */\n\n\nvar mediaSegmentRequest = function mediaSegmentRequest(_ref12) {\n  var xhr = _ref12.xhr,\n      xhrOptions = _ref12.xhrOptions,\n      decryptionWorker = _ref12.decryptionWorker,\n      segment = _ref12.segment,\n      abortFn = _ref12.abortFn,\n      progressFn = _ref12.progressFn,\n      trackInfoFn = _ref12.trackInfoFn,\n      timingInfoFn = _ref12.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref12.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref12.audioSegmentTimingInfoFn,\n      id3Fn = _ref12.id3Fn,\n      captionsFn = _ref12.captionsFn,\n      isEndOfTimeline = _ref12.isEndOfTimeline,\n      endedTimelineFn = _ref12.endedTimelineFn,\n      dataFn = _ref12.dataFn,\n      doneFn = _ref12.doneFn,\n      onTransmuxerLog = _ref12.onTransmuxerLog;\n  var activeXhrs = [];\n  var finishProcessingFn = waitForCompletion({\n    activeXhrs: activeXhrs,\n    decryptionWorker: decryptionWorker,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  }); // optionally, request the decryption key\n\n  if (segment.key && !segment.key.bytes) {\n    var objects = [segment.key];\n\n    if (segment.map && !segment.map.bytes && segment.map.key && segment.map.key.resolvedUri === segment.key.resolvedUri) {\n      objects.push(segment.map.key);\n    }\n\n    var keyRequestOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.key.resolvedUri,\n      responseType: 'arraybuffer'\n    });\n    var keyRequestCallback = handleKeyResponse(segment, objects, finishProcessingFn);\n    var keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n    activeXhrs.push(keyXhr);\n  } // optionally, request the associated media init segment\n\n\n  if (segment.map && !segment.map.bytes) {\n    var differentMapKey = segment.map.key && (!segment.key || segment.key.resolvedUri !== segment.map.key.resolvedUri);\n\n    if (differentMapKey) {\n      var mapKeyRequestOptions = videojs.mergeOptions(xhrOptions, {\n        uri: segment.map.key.resolvedUri,\n        responseType: 'arraybuffer'\n      });\n      var mapKeyRequestCallback = handleKeyResponse(segment, [segment.map.key], finishProcessingFn);\n      var mapKeyXhr = xhr(mapKeyRequestOptions, mapKeyRequestCallback);\n      activeXhrs.push(mapKeyXhr);\n    }\n\n    var initSegmentOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.map.resolvedUri,\n      responseType: 'arraybuffer',\n      headers: segmentXhrHeaders(segment.map)\n    });\n    var initSegmentRequestCallback = handleInitSegmentResponse({\n      segment: segment,\n      finishProcessingFn: finishProcessingFn\n    });\n    var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n    activeXhrs.push(initSegmentXhr);\n  }\n\n  var segmentRequestOptions = videojs.mergeOptions(xhrOptions, {\n    uri: segment.part && segment.part.resolvedUri || segment.resolvedUri,\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(segment)\n  });\n  var segmentRequestCallback = handleSegmentResponse({\n    segment: segment,\n    finishProcessingFn: finishProcessingFn,\n    responseType: segmentRequestOptions.responseType\n  });\n  var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n  segmentXhr.addEventListener('progress', handleProgress({\n    segment: segment,\n    progressFn: progressFn,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn\n  }));\n  activeXhrs.push(segmentXhr); // since all parts of the request must be considered, but should not make callbacks\n  // multiple times, provide a shared state object\n\n  var loadendState = {};\n  activeXhrs.forEach(function (activeXhr) {\n    activeXhr.addEventListener('loadend', handleLoadEnd({\n      loadendState: loadendState,\n      abortFn: abortFn\n    }));\n  });\n  return function () {\n    return abortAll(activeXhrs);\n  };\n};\n\n/**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\nvar logFn$1 = logger('CodecUtils');\n/**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n *\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\n\nvar getCodecs = function getCodecs(media) {\n  // if the codecs were explicitly specified, use them instead of the\n  // defaults\n  var mediaAttributes = media.attributes || {};\n\n  if (mediaAttributes.CODECS) {\n    return parseCodecs(mediaAttributes.CODECS);\n  }\n};\n\nvar isMaat = function isMaat(master, media) {\n  var mediaAttributes = media.attributes || {};\n  return master && master.mediaGroups && master.mediaGroups.AUDIO && mediaAttributes.AUDIO && master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n};\nvar isMuxed = function isMuxed(master, media) {\n  if (!isMaat(master, media)) {\n    return true;\n  }\n\n  var mediaAttributes = media.attributes || {};\n  var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n\n  for (var groupId in audioGroup) {\n    // If an audio group has a URI (the case for HLS, as HLS will use external playlists),\n    // or there are listed playlists (the case for DASH, as the manifest will have already\n    // provided all of the details necessary to generate the audio playlist, as opposed to\n    // HLS' externally requested playlists), then the content is demuxed.\n    if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {\n      return true;\n    }\n  }\n\n  return false;\n};\nvar unwrapCodecList = function unwrapCodecList(codecList) {\n  var codecs = {};\n  codecList.forEach(function (_ref) {\n    var mediaType = _ref.mediaType,\n        type = _ref.type,\n        details = _ref.details;\n    codecs[mediaType] = codecs[mediaType] || [];\n    codecs[mediaType].push(translateLegacyCodec(\"\" + type + details));\n  });\n  Object.keys(codecs).forEach(function (mediaType) {\n    if (codecs[mediaType].length > 1) {\n      logFn$1(\"multiple \" + mediaType + \" codecs found as attributes: \" + codecs[mediaType].join(', ') + \". Setting playlist codecs to null so that we wait for mux.js to probe segments for real codecs.\");\n      codecs[mediaType] = null;\n      return;\n    }\n\n    codecs[mediaType] = codecs[mediaType][0];\n  });\n  return codecs;\n};\nvar codecCount = function codecCount(codecObj) {\n  var count = 0;\n\n  if (codecObj.audio) {\n    count++;\n  }\n\n  if (codecObj.video) {\n    count++;\n  }\n\n  return count;\n};\n/**\n * Calculates the codec strings for a working configuration of\n * SourceBuffers to play variant streams in a master playlist. If\n * there is no possible working configuration, an empty object will be\n * returned.\n *\n * @param master {Object} the m3u8 object for the master playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Object} the codec strings.\n *\n * @private\n */\n\nvar codecsForPlaylist = function codecsForPlaylist(master, media) {\n  var mediaAttributes = media.attributes || {};\n  var codecInfo = unwrapCodecList(getCodecs(media) || []); // HLS with multiple-audio tracks must always get an audio codec.\n  // Put another way, there is no way to have a video-only multiple-audio HLS!\n\n  if (isMaat(master, media) && !codecInfo.audio) {\n    if (!isMuxed(master, media)) {\n      // It is possible for codecs to be specified on the audio media group playlist but\n      // not on the rendition playlist. This is mostly the case for DASH, where audio and\n      // video are always separate (and separately specified).\n      var defaultCodecs = unwrapCodecList(codecsFromDefault(master, mediaAttributes.AUDIO) || []);\n\n      if (defaultCodecs.audio) {\n        codecInfo.audio = defaultCodecs.audio;\n      }\n    }\n  }\n\n  return codecInfo;\n};\n\nvar logFn = logger('PlaylistSelector');\n\nvar representationToString = function representationToString(representation) {\n  if (!representation || !representation.playlist) {\n    return;\n  }\n\n  var playlist = representation.playlist;\n  return JSON.stringify({\n    id: playlist.id,\n    bandwidth: representation.bandwidth,\n    width: representation.width,\n    height: representation.height,\n    codecs: playlist.attributes && playlist.attributes.CODECS || ''\n  });\n}; // Utilities\n\n/**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\n\n\nvar safeGetComputedStyle = function safeGetComputedStyle(el, property) {\n  if (!el) {\n    return '';\n  }\n\n  var result = window$1.getComputedStyle(el);\n\n  if (!result) {\n    return '';\n  }\n\n  return result[property];\n};\n/**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\n\n\nvar stableSort = function stableSort(array, sortFn) {\n  var newArray = array.slice();\n  array.sort(function (left, right) {\n    var cmp = sortFn(left, right);\n\n    if (cmp === 0) {\n      return newArray.indexOf(left) - newArray.indexOf(right);\n    }\n\n    return cmp;\n  });\n};\n/**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {\n  var leftBandwidth;\n  var rightBandwidth;\n\n  if (left.attributes.BANDWIDTH) {\n    leftBandwidth = left.attributes.BANDWIDTH;\n  }\n\n  leftBandwidth = leftBandwidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.BANDWIDTH) {\n    rightBandwidth = right.attributes.BANDWIDTH;\n  }\n\n  rightBandwidth = rightBandwidth || window$1.Number.MAX_VALUE;\n  return leftBandwidth - rightBandwidth;\n};\n/**\n * A comparator function to sort two playlist object by resolution (width).\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\n\nvar comparePlaylistResolution = function comparePlaylistResolution(left, right) {\n  var leftWidth;\n  var rightWidth;\n\n  if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n    leftWidth = left.attributes.RESOLUTION.width;\n  }\n\n  leftWidth = leftWidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n    rightWidth = right.attributes.RESOLUTION.width;\n  }\n\n  rightWidth = rightWidth || window$1.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n  // have the same media dimensions/ resolution\n\n  if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n    return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n  }\n\n  return leftWidth - rightWidth;\n};\n/**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} master\n *        Object representation of the master manifest\n * @param {number} playerBandwidth\n *        Current calculated bandwidth of the player\n * @param {number} playerWidth\n *        Current width of the player element (should account for the device pixel ratio)\n * @param {number} playerHeight\n *        Current height of the player element (should account for the device pixel ratio)\n * @param {boolean} limitRenditionByPlayerDimensions\n *        True if the player width and height should be used during the selection, false otherwise\n * @param {Object} masterPlaylistController\n *        the current masterPlaylistController object\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\nvar simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions, masterPlaylistController) {\n  // If we end up getting called before `master` is available, exit early\n  if (!master) {\n    return;\n  }\n\n  var options = {\n    bandwidth: playerBandwidth,\n    width: playerWidth,\n    height: playerHeight,\n    limitRenditionByPlayerDimensions: limitRenditionByPlayerDimensions\n  };\n  var playlists = master.playlists; // if playlist is audio only, select between currently active audio group playlists.\n\n  if (Playlist.isAudioOnly(master)) {\n    playlists = masterPlaylistController.getAudioTrackPlaylists_(); // add audioOnly to options so that we log audioOnly: true\n    // at the buttom of this function for debugging.\n\n    options.audioOnly = true;\n  } // convert the playlists to an intermediary representation to make comparisons easier\n\n\n  var sortedPlaylistReps = playlists.map(function (playlist) {\n    var bandwidth;\n    var width = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n    var height = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n    bandwidth = playlist.attributes && playlist.attributes.BANDWIDTH;\n    bandwidth = bandwidth || window$1.Number.MAX_VALUE;\n    return {\n      bandwidth: bandwidth,\n      width: width,\n      height: height,\n      playlist: playlist\n    };\n  });\n  stableSort(sortedPlaylistReps, function (left, right) {\n    return left.bandwidth - right.bandwidth;\n  }); // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return !Playlist.isIncompatible(rep.playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return Playlist.isEnabled(rep.playlist);\n  });\n\n  if (!enabledPlaylistReps.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n      return !Playlist.isDisabled(rep.playlist);\n    });\n  } // filter out any variant that has greater effective bitrate\n  // than the current estimated bandwidth\n\n\n  var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {\n    return rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth;\n  });\n  var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth\n  // and then taking the very first element\n\n  var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0]; // if we're not going to limit renditions by player size, make an early decision.\n\n  if (limitRenditionByPlayerDimensions === false) {\n    var _chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n    if (_chosenRep && _chosenRep.playlist) {\n      var type = 'sortedPlaylistReps';\n\n      if (bandwidthBestRep) {\n        type = 'bandwidthBestRep';\n      }\n\n      if (enabledPlaylistReps[0]) {\n        type = 'enabledPlaylistReps';\n      }\n\n      logFn(\"choosing \" + representationToString(_chosenRep) + \" using \" + type + \" with options\", options);\n      return _chosenRep.playlist;\n    }\n\n    logFn('could not choose a playlist with options', options);\n    return null;\n  } // filter out playlists without resolution information\n\n\n  var haveResolution = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.width && rep.height;\n  }); // sort variants by resolution\n\n  stableSort(haveResolution, function (left, right) {\n    return left.width - right.width;\n  }); // if we have the exact resolution as the player use it\n\n  var resolutionBestRepList = haveResolution.filter(function (rep) {\n    return rep.width === playerWidth && rep.height === playerHeight;\n  });\n  highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution\n\n  var resolutionBestRep = resolutionBestRepList.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n  var resolutionPlusOneList;\n  var resolutionPlusOneSmallest;\n  var resolutionPlusOneRep; // find the smallest variant that is larger than the player\n  // if there is no match of exact resolution\n\n  if (!resolutionBestRep) {\n    resolutionPlusOneList = haveResolution.filter(function (rep) {\n      return rep.width > playerWidth || rep.height > playerHeight;\n    }); // find all the variants have the same smallest resolution\n\n    resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {\n      return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;\n    }); // ensure that we also pick the highest bandwidth variant that\n    // is just-larger-than the video player\n\n    highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n    resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {\n      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n    })[0];\n  }\n\n  var leastPixelDiffRep; // If this selector proves to be better than others,\n  // resolutionPlusOneRep and resolutionBestRep and all\n  // the code involving them should be removed.\n\n  if (masterPlaylistController.experimentalLeastPixelDiffSelector) {\n    // find the variant that is closest to the player's pixel size\n    var leastPixelDiffList = haveResolution.map(function (rep) {\n      rep.pixelDiff = Math.abs(rep.width - playerWidth) + Math.abs(rep.height - playerHeight);\n      return rep;\n    }); // get the highest bandwidth, closest resolution playlist\n\n    stableSort(leastPixelDiffList, function (left, right) {\n      // sort by highest bandwidth if pixelDiff is the same\n      if (left.pixelDiff === right.pixelDiff) {\n        return right.bandwidth - left.bandwidth;\n      }\n\n      return left.pixelDiff - right.pixelDiff;\n    });\n    leastPixelDiffRep = leastPixelDiffList[0];\n  } // fallback chain of variants\n\n\n  var chosenRep = leastPixelDiffRep || resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n  if (chosenRep && chosenRep.playlist) {\n    var _type = 'sortedPlaylistReps';\n\n    if (leastPixelDiffRep) {\n      _type = 'leastPixelDiffRep';\n    } else if (resolutionPlusOneRep) {\n      _type = 'resolutionPlusOneRep';\n    } else if (resolutionBestRep) {\n      _type = 'resolutionBestRep';\n    } else if (bandwidthBestRep) {\n      _type = 'bandwidthBestRep';\n    } else if (enabledPlaylistReps[0]) {\n      _type = 'enabledPlaylistReps';\n    }\n\n    logFn(\"choosing \" + representationToString(chosenRep) + \" using \" + _type + \" with options\", options);\n    return chosenRep.playlist;\n  }\n\n  logFn('could not choose a playlist with options', options);\n  return null;\n};\n\n/**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\nvar lastBandwidthSelector = function lastBandwidthSelector() {\n  var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n  return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n};\n/**\n * Chooses the appropriate media playlist based on an\n * exponential-weighted moving average of the bandwidth after\n * filtering for player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @param {number} decay - a number between 0 and 1. Higher values of\n * this parameter will cause previous bandwidth estimates to lose\n * significance more quickly.\n * @return {Function} a function which can be invoked to create a new\n * playlist selector function.\n * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average\n */\n\nvar movingAverageBandwidthSelector = function movingAverageBandwidthSelector(decay) {\n  var average = -1;\n  var lastSystemBandwidth = -1;\n\n  if (decay < 0 || decay > 1) {\n    throw new Error('Moving average bandwidth decay must be between 0 and 1.');\n  }\n\n  return function () {\n    var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n\n    if (average < 0) {\n      average = this.systemBandwidth;\n      lastSystemBandwidth = this.systemBandwidth;\n    } // stop the average value from decaying for every 250ms\n    // when the systemBandwidth is constant\n    // and\n    // stop average from setting to a very low value when the\n    // systemBandwidth becomes 0 in case of chunk cancellation\n\n\n    if (this.systemBandwidth > 0 && this.systemBandwidth !== lastSystemBandwidth) {\n      average = decay * this.systemBandwidth + (1 - decay) * average;\n      lastSystemBandwidth = this.systemBandwidth;\n    }\n\n    return simpleSelector(this.playlists.master, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n  };\n};\n/**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n *        Object of information required to use this selector\n * @param {Object} settings.master\n *        Object representation of the master manifest\n * @param {number} settings.currentTime\n *        The current time of the player\n * @param {number} settings.bandwidth\n *        Current measured bandwidth\n * @param {number} settings.duration\n *        Duration of the media\n * @param {number} settings.segmentDuration\n *        Segment duration to be used in round trip time calculations\n * @param {number} settings.timeUntilRebuffer\n *        Time left in seconds until the player has to rebuffer\n * @param {number} settings.currentTimeline\n *        The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n *        SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n *         {Object} return.playlist\n *         The highest bandwidth playlist with the least amount of rebuffering\n *         {Number} return.rebufferingImpact\n *         The amount of time in seconds switching to this playlist will rebuffer. A\n *         negative value means that switching will cause zero rebuffering.\n */\n\nvar minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {\n  var master = settings.master,\n      currentTime = settings.currentTime,\n      bandwidth = settings.bandwidth,\n      duration = settings.duration,\n      segmentDuration = settings.segmentDuration,\n      timeUntilRebuffer = settings.timeUntilRebuffer,\n      currentTimeline = settings.currentTimeline,\n      syncController = settings.syncController; // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  var compatiblePlaylists = master.playlists.filter(function (playlist) {\n    return !Playlist.isIncompatible(playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);\n\n  if (!enabledPlaylists.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylists = compatiblePlaylists.filter(function (playlist) {\n      return !Playlist.isDisabled(playlist);\n    });\n  }\n\n  var bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));\n  var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {\n    var syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a\n    // sync request first. This will double the request time\n\n    var numRequests = syncPoint ? 1 : 2;\n    var requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n    var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n    return {\n      playlist: playlist,\n      rebufferingImpact: rebufferingImpact\n    };\n  });\n  var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {\n    return estimate.rebufferingImpact <= 0;\n  }); // Sort by bandwidth DESC\n\n  stableSort(noRebufferingPlaylists, function (a, b) {\n    return comparePlaylistBandwidth(b.playlist, a.playlist);\n  });\n\n  if (noRebufferingPlaylists.length) {\n    return noRebufferingPlaylists[0];\n  }\n\n  stableSort(rebufferingEstimates, function (a, b) {\n    return a.rebufferingImpact - b.rebufferingImpact;\n  });\n  return rebufferingEstimates[0] || null;\n};\n/**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video.  If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Object|null}\n *         {Object} return.playlist\n *         The lowest bitrate playlist that contains a video codec.  If no such rendition\n *         exists pick the lowest audio rendition.\n */\n\nvar lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {\n  var _this = this;\n\n  // filter out any playlists that have been excluded due to\n  // incompatible configurations or playback errors\n  var playlists = this.playlists.master.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate\n\n  stableSort(playlists, function (a, b) {\n    return comparePlaylistBandwidth(a, b);\n  }); // Parse and assume that playlists with no video codec have no video\n  // (this is not necessarily true, although it is generally true).\n  //\n  // If an entire manifest has no valid videos everything will get filtered\n  // out.\n\n  var playlistsWithVideo = playlists.filter(function (playlist) {\n    return !!codecsForPlaylist(_this.playlists.master, playlist).video;\n  });\n  return playlistsWithVideo[0] || null;\n};\n\n/**\n * Combine all segments into a single Uint8Array\n *\n * @param {Object} segmentObj\n * @return {Uint8Array} concatenated bytes\n * @private\n */\nvar concatSegments = function concatSegments(segmentObj) {\n  var offset = 0;\n  var tempBuffer;\n\n  if (segmentObj.bytes) {\n    tempBuffer = new Uint8Array(segmentObj.bytes); // combine the individual segments into one large typed-array\n\n    segmentObj.segments.forEach(function (segment) {\n      tempBuffer.set(segment, offset);\n      offset += segment.byteLength;\n    });\n  }\n\n  return tempBuffer;\n};\n\n/**\n * @file text-tracks.js\n */\n/**\n * Create captions text tracks on video.js if they do not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {Object} tech the video.js tech\n * @param {Object} captionStream the caption stream to create\n * @private\n */\n\nvar createCaptionsTrackIfNotExists = function createCaptionsTrackIfNotExists(inbandTextTracks, tech, captionStream) {\n  if (!inbandTextTracks[captionStream]) {\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-608'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-608'\n    });\n    var instreamId = captionStream; // we need to translate SERVICEn for 708 to how mux.js currently labels them\n\n    if (/^cc708_/.test(captionStream)) {\n      instreamId = 'SERVICE' + captionStream.split('_')[1];\n    }\n\n    var track = tech.textTracks().getTrackById(instreamId);\n\n    if (track) {\n      // Resuse an existing track with a CC# id because this was\n      // very likely created by videojs-contrib-hls from information\n      // in the m3u8 for us to use\n      inbandTextTracks[captionStream] = track;\n    } else {\n      // This section gets called when we have caption services that aren't specified in the manifest.\n      // Manifest level caption services are handled in media-groups.js under CLOSED-CAPTIONS.\n      var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n      var label = captionStream;\n      var language = captionStream;\n      var def = false;\n      var captionService = captionServices[instreamId];\n\n      if (captionService) {\n        label = captionService.label;\n        language = captionService.language;\n        def = captionService.default;\n      } // Otherwise, create a track with the default `CC#` label and\n      // without a language\n\n\n      inbandTextTracks[captionStream] = tech.addRemoteTextTrack({\n        kind: 'captions',\n        id: instreamId,\n        // TODO: investigate why this doesn't seem to turn the caption on by default\n        default: def,\n        label: label,\n        language: language\n      }, false).track;\n    }\n  }\n};\n/**\n * Add caption text track data to a source handler given an array of captions\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {Array} captionArray an array of caption data\n * @private\n */\n\nvar addCaptionData = function addCaptionData(_ref) {\n  var inbandTextTracks = _ref.inbandTextTracks,\n      captionArray = _ref.captionArray,\n      timestampOffset = _ref.timestampOffset;\n\n  if (!captionArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  captionArray.forEach(function (caption) {\n    var track = caption.stream;\n    inbandTextTracks[track].addCue(new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, caption.text));\n  });\n};\n/**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\n\nvar deprecateOldCue = function deprecateOldCue(cue) {\n  Object.defineProperties(cue.frame, {\n    id: {\n      get: function get() {\n        videojs.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n        return cue.value.key;\n      }\n    },\n    value: {\n      get: function get() {\n        videojs.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    },\n    privateData: {\n      get: function get() {\n        videojs.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    }\n  });\n};\n/**\n * Add metadata text track data to a source handler given an array of metadata\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {Array} metadataArray an array of meta data\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {number} videoDuration the duration of the video\n * @private\n */\n\n\nvar addMetadata = function addMetadata(_ref2) {\n  var inbandTextTracks = _ref2.inbandTextTracks,\n      metadataArray = _ref2.metadataArray,\n      timestampOffset = _ref2.timestampOffset,\n      videoDuration = _ref2.videoDuration;\n\n  if (!metadataArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  var metadataTrack = inbandTextTracks.metadataTrack_;\n\n  if (!metadataTrack) {\n    return;\n  }\n\n  metadataArray.forEach(function (metadata) {\n    var time = metadata.cueTime + timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,\n    // ignore this bit of metadata.\n    // This likely occurs when you have an non-timed ID3 tag like TIT2,\n    // which is the \"Title/Songname/Content description\" frame\n\n    if (typeof time !== 'number' || window$1.isNaN(time) || time < 0 || !(time < Infinity)) {\n      return;\n    }\n\n    metadata.frames.forEach(function (frame) {\n      var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n      cue.frame = frame;\n      cue.value = frame;\n      deprecateOldCue(cue);\n      metadataTrack.addCue(cue);\n    });\n  });\n\n  if (!metadataTrack.cues || !metadataTrack.cues.length) {\n    return;\n  } // Updating the metadeta cues so that\n  // the endTime of each cue is the startTime of the next cue\n  // the endTime of last cue is the duration of the video\n\n\n  var cues = metadataTrack.cues;\n  var cuesArray = []; // Create a copy of the TextTrackCueList...\n  // ...disregarding cues with a falsey value\n\n  for (var i = 0; i < cues.length; i++) {\n    if (cues[i]) {\n      cuesArray.push(cues[i]);\n    }\n  } // Group cues by their startTime value\n\n\n  var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {\n    var timeSlot = obj[cue.startTime] || [];\n    timeSlot.push(cue);\n    obj[cue.startTime] = timeSlot;\n    return obj;\n  }, {}); // Sort startTimes by ascending order\n\n  var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {\n    return Number(a) - Number(b);\n  }); // Map each cue group's endTime to the next group's startTime\n\n  sortedStartTimes.forEach(function (startTime, idx) {\n    var cueGroup = cuesGroupedByStartTime[startTime];\n    var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime\n\n    cueGroup.forEach(function (cue) {\n      cue.endTime = nextTime;\n    });\n  });\n};\n/**\n * Create metadata text track on video.js if it does not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {string} dispatchType the inband metadata track dispatch type\n * @param {Object} tech the video.js tech\n * @private\n */\n\nvar createMetadataTrackIfNotExists = function createMetadataTrackIfNotExists(inbandTextTracks, dispatchType, tech) {\n  if (inbandTextTracks.metadataTrack_) {\n    return;\n  }\n\n  inbandTextTracks.metadataTrack_ = tech.addRemoteTextTrack({\n    kind: 'metadata',\n    label: 'Timed Metadata'\n  }, false).track;\n  inbandTextTracks.metadataTrack_.inBandMetadataTrackDispatchType = dispatchType;\n};\n/**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\nvar removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {\n  var i;\n  var cue;\n\n  if (!track) {\n    return;\n  }\n\n  if (!track.cues) {\n    return;\n  }\n\n  i = track.cues.length;\n\n  while (i--) {\n    cue = track.cues[i]; // Remove any cue within the provided start and end time\n\n    if (cue.startTime >= start && cue.endTime <= end) {\n      track.removeCue(cue);\n    }\n  }\n};\n/**\n * Remove duplicate cues from a track on video.js (a cue is considered a\n * duplicate if it has the same time interval and text as another)\n *\n * @param {Object} track the text track to remove the duplicate cues from\n * @private\n */\n\nvar removeDuplicateCuesFromTrack = function removeDuplicateCuesFromTrack(track) {\n  var cues = track.cues;\n\n  if (!cues) {\n    return;\n  }\n\n  for (var i = 0; i < cues.length; i++) {\n    var duplicates = [];\n    var occurrences = 0;\n\n    for (var j = 0; j < cues.length; j++) {\n      if (cues[i].startTime === cues[j].startTime && cues[i].endTime === cues[j].endTime && cues[i].text === cues[j].text) {\n        occurrences++;\n\n        if (occurrences > 1) {\n          duplicates.push(cues[j]);\n        }\n      }\n    }\n\n    if (duplicates.length) {\n      duplicates.forEach(function (dupe) {\n        return track.removeCue(dupe);\n      });\n    }\n  }\n};\n\n/**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {number} currentTime\n *        The current time\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n * @return {Array}\n *         List of gops considered safe to append over\n */\n\nvar gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, currentTime, mapping) {\n  if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {\n    return [];\n  } // pts value for current time + 3 seconds to give a bit more wiggle room\n\n\n  var currentTimePts = Math.ceil((currentTime - mapping + 3) * ONE_SECOND_IN_TS);\n  var i;\n\n  for (i = 0; i < buffer.length; i++) {\n    if (buffer[i].pts > currentTimePts) {\n      break;\n    }\n  }\n\n  return buffer.slice(i);\n};\n/**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Array} gops\n *        List of new gop information\n * @param {boolean} replace\n *        If true, replace the buffer with the new gop information. If false, append the\n *        new gop information to the buffer in the right location of time.\n * @return {Array}\n *         Updated list of gop information\n */\n\nvar updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {\n  if (!gops.length) {\n    return buffer;\n  }\n\n  if (replace) {\n    // If we are in safe append mode, then completely overwrite the gop buffer\n    // with the most recent appeneded data. This will make sure that when appending\n    // future segments, we only try to align with gops that are both ahead of current\n    // time and in the last segment appended.\n    return gops.slice();\n  }\n\n  var start = gops[0].pts;\n  var i = 0;\n\n  for (i; i < buffer.length; i++) {\n    if (buffer[i].pts >= start) {\n      break;\n    }\n  }\n\n  return buffer.slice(0, i).concat(gops);\n};\n/**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Double} start\n *        position to start the remove at\n * @param {Double} end\n *        position to end the remove at\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n */\n\nvar removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {\n  var startPts = Math.ceil((start - mapping) * ONE_SECOND_IN_TS);\n  var endPts = Math.ceil((end - mapping) * ONE_SECOND_IN_TS);\n  var updatedBuffer = buffer.slice();\n  var i = buffer.length;\n\n  while (i--) {\n    if (buffer[i].pts <= endPts) {\n      break;\n    }\n  }\n\n  if (i === -1) {\n    // no removal because end of remove range is before start of buffer\n    return updatedBuffer;\n  }\n\n  var j = i + 1;\n\n  while (j--) {\n    if (buffer[j].pts <= startPts) {\n      break;\n    }\n  } // clamp remove range start to 0 index\n\n\n  j = Math.max(j, 0);\n  updatedBuffer.splice(j, i - j + 1);\n  return updatedBuffer;\n};\n\nvar shallowEqual = function shallowEqual(a, b) {\n  // if both are undefined\n  // or one or the other is undefined\n  // they are not equal\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // they are the same object and thus, equal\n\n\n  if (a === b) {\n    return true;\n  } // sort keys so we can make sure they have\n  // all the same keys later.\n\n\n  var akeys = Object.keys(a).sort();\n  var bkeys = Object.keys(b).sort(); // different number of keys, not equal\n\n  if (akeys.length !== bkeys.length) {\n    return false;\n  }\n\n  for (var i = 0; i < akeys.length; i++) {\n    var key = akeys[i]; // different sorted keys, not equal\n\n    if (key !== bkeys[i]) {\n      return false;\n    } // different values, not equal\n\n\n    if (a[key] !== b[key]) {\n      return false;\n    }\n  }\n\n  return true;\n};\n\n// https://www.w3.org/TR/WebIDL-1/#quotaexceedederror\nvar QUOTA_EXCEEDED_ERR = 22;\n\n/**\n * The segment loader has no recourse except to fetch a segment in the\n * current playlist and use the internal timestamps in that segment to\n * generate a syncPoint. This function returns a good candidate index\n * for that process.\n *\n * @param {Array} segments - the segments array from a playlist.\n * @return {number} An index of a segment from the playlist to load\n */\n\nvar getSyncSegmentCandidate = function getSyncSegmentCandidate(currentTimeline, segments, targetTime) {\n  segments = segments || [];\n  var timelineSegments = [];\n  var time = 0;\n\n  for (var i = 0; i < segments.length; i++) {\n    var segment = segments[i];\n\n    if (currentTimeline === segment.timeline) {\n      timelineSegments.push(i);\n      time += segment.duration;\n\n      if (time > targetTime) {\n        return i;\n      }\n    }\n  }\n\n  if (timelineSegments.length === 0) {\n    return 0;\n  } // default to the last timeline segment\n\n\n  return timelineSegments[timelineSegments.length - 1];\n}; // In the event of a quota exceeded error, keep at least one second of back buffer. This\n// number was arbitrarily chosen and may be updated in the future, but seemed reasonable\n// as a start to prevent any potential issues with removing content too close to the\n// playhead.\n\nvar MIN_BACK_BUFFER = 1; // in ms\n\nvar CHECK_BUFFER_DELAY = 500;\n\nvar finite = function finite(num) {\n  return typeof num === 'number' && isFinite(num);\n}; // With most content hovering around 30fps, if a segment has a duration less than a half\n// frame at 30fps or one frame at 60fps, the bandwidth and throughput calculations will\n// not accurately reflect the rest of the content.\n\n\nvar MIN_SEGMENT_DURATION_TO_SAVE_STATS = 1 / 60;\nvar illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, trackInfo) {\n  // Although these checks should most likely cover non 'main' types, for now it narrows\n  // the scope of our checks.\n  if (loaderType !== 'main' || !startingMedia || !trackInfo) {\n    return null;\n  }\n\n  if (!trackInfo.hasAudio && !trackInfo.hasVideo) {\n    return 'Neither audio nor video found in segment.';\n  }\n\n  if (startingMedia.hasVideo && !trackInfo.hasVideo) {\n    return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  if (!startingMedia.hasVideo && trackInfo.hasVideo) {\n    return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  return null;\n};\n/**\n * Calculates a time value that is safe to remove from the back buffer without interrupting\n * playback.\n *\n * @param {TimeRange} seekable\n *        The current seekable range\n * @param {number} currentTime\n *        The current time of the player\n * @param {number} targetDuration\n *        The target duration of the current playlist\n * @return {number}\n *         Time that is safe to remove from the back buffer without interrupting playback\n */\n\nvar safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable, currentTime, targetDuration) {\n  // 30 seconds before the playhead provides a safe default for trimming.\n  //\n  // Choosing a reasonable default is particularly important for high bitrate content and\n  // VOD videos/live streams with large windows, as the buffer may end up overfilled and\n  // throw an APPEND_BUFFER_ERR.\n  var trimTime = currentTime - Config.BACK_BUFFER_LENGTH;\n\n  if (seekable.length) {\n    // Some live playlists may have a shorter window of content than the full allowed back\n    // buffer. For these playlists, don't save content that's no longer within the window.\n    trimTime = Math.max(trimTime, seekable.start(0));\n  } // Don't remove within target duration of the current time to avoid the possibility of\n  // removing the GOP currently being played, as removing it can cause playback stalls.\n\n\n  var maxTrimTime = currentTime - targetDuration;\n  return Math.min(maxTrimTime, trimTime);\n};\nvar segmentInfoString = function segmentInfoString(segmentInfo) {\n  var startOfSegment = segmentInfo.startOfSegment,\n      duration = segmentInfo.duration,\n      segment = segmentInfo.segment,\n      part = segmentInfo.part,\n      _segmentInfo$playlist = segmentInfo.playlist,\n      seq = _segmentInfo$playlist.mediaSequence,\n      id = _segmentInfo$playlist.id,\n      _segmentInfo$playlist2 = _segmentInfo$playlist.segments,\n      segments = _segmentInfo$playlist2 === void 0 ? [] : _segmentInfo$playlist2,\n      index = segmentInfo.mediaIndex,\n      partIndex = segmentInfo.partIndex,\n      timeline = segmentInfo.timeline;\n  var segmentLen = segments.length - 1;\n  var selection = 'mediaIndex/partIndex increment';\n\n  if (segmentInfo.getMediaInfoForTime) {\n    selection = \"getMediaInfoForTime (\" + segmentInfo.getMediaInfoForTime + \")\";\n  } else if (segmentInfo.isSyncRequest) {\n    selection = 'getSyncSegmentCandidate (isSyncRequest)';\n  }\n\n  if (segmentInfo.independent) {\n    selection += \" with independent \" + segmentInfo.independent;\n  }\n\n  var hasPartIndex = typeof partIndex === 'number';\n  var name = segmentInfo.segment.uri ? 'segment' : 'pre-segment';\n  var zeroBasedPartCount = hasPartIndex ? getKnownPartCount({\n    preloadSegment: segment\n  }) - 1 : 0;\n  return name + \" [\" + (seq + index) + \"/\" + (seq + segmentLen) + \"]\" + (hasPartIndex ? \" part [\" + partIndex + \"/\" + zeroBasedPartCount + \"]\" : '') + (\" segment start/end [\" + segment.start + \" => \" + segment.end + \"]\") + (hasPartIndex ? \" part start/end [\" + part.start + \" => \" + part.end + \"]\" : '') + (\" startOfSegment [\" + startOfSegment + \"]\") + (\" duration [\" + duration + \"]\") + (\" timeline [\" + timeline + \"]\") + (\" selected by [\" + selection + \"]\") + (\" playlist [\" + id + \"]\");\n};\n\nvar timingInfoPropertyForMedia = function timingInfoPropertyForMedia(mediaType) {\n  return mediaType + \"TimingInfo\";\n};\n/**\n * Returns the timestamp offset to use for the segment.\n *\n * @param {number} segmentTimeline\n *        The timeline of the segment\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} startOfSegment\n *        The estimated segment start\n * @param {TimeRange[]} buffered\n *        The loader's buffer\n * @param {boolean} overrideCheck\n *        If true, no checks are made to see if the timestamp offset value should be set,\n *        but sets it directly to a value.\n *\n * @return {number|null}\n *         Either a number representing a new timestamp offset, or null if the segment is\n *         part of the same timeline\n */\n\n\nvar timestampOffsetForSegment = function timestampOffsetForSegment(_ref) {\n  var segmentTimeline = _ref.segmentTimeline,\n      currentTimeline = _ref.currentTimeline,\n      startOfSegment = _ref.startOfSegment,\n      buffered = _ref.buffered,\n      overrideCheck = _ref.overrideCheck;\n\n  // Check to see if we are crossing a discontinuity to see if we need to set the\n  // timestamp offset on the transmuxer and source buffer.\n  //\n  // Previously, we changed the timestampOffset if the start of this segment was less than\n  // the currently set timestampOffset, but this isn't desirable as it can produce bad\n  // behavior, especially around long running live streams.\n  if (!overrideCheck && segmentTimeline === currentTimeline) {\n    return null;\n  } // When changing renditions, it's possible to request a segment on an older timeline. For\n  // instance, given two renditions with the following:\n  //\n  // #EXTINF:10\n  // segment1\n  // #EXT-X-DISCONTINUITY\n  // #EXTINF:10\n  // segment2\n  // #EXTINF:10\n  // segment3\n  //\n  // And the current player state:\n  //\n  // current time: 8\n  // buffer: 0 => 20\n  //\n  // The next segment on the current rendition would be segment3, filling the buffer from\n  // 20s onwards. However, if a rendition switch happens after segment2 was requested,\n  // then the next segment to be requested will be segment1 from the new rendition in\n  // order to fill time 8 and onwards. Using the buffered end would result in repeated\n  // content (since it would position segment1 of the new rendition starting at 20s). This\n  // case can be identified when the new segment's timeline is a prior value. Instead of\n  // using the buffered end, the startOfSegment can be used, which, hopefully, will be\n  // more accurate to the actual start time of the segment.\n\n\n  if (segmentTimeline < currentTimeline) {\n    return startOfSegment;\n  } // segmentInfo.startOfSegment used to be used as the timestamp offset, however, that\n  // value uses the end of the last segment if it is available. While this value\n  // should often be correct, it's better to rely on the buffered end, as the new\n  // content post discontinuity should line up with the buffered end as if it were\n  // time 0 for the new content.\n\n\n  return buffered.length ? buffered.end(buffered.length - 1) : startOfSegment;\n};\n/**\n * Returns whether or not the loader should wait for a timeline change from the timeline\n * change controller before processing the segment.\n *\n * Primary timing in VHS goes by video. This is different from most media players, as\n * audio is more often used as the primary timing source. For the foreseeable future, VHS\n * will continue to use video as the primary timing source, due to the current logic and\n * expectations built around it.\n\n * Since the timing follows video, in order to maintain sync, the video loader is\n * responsible for setting both audio and video source buffer timestamp offsets.\n *\n * Setting different values for audio and video source buffers could lead to\n * desyncing. The following examples demonstrate some of the situations where this\n * distinction is important. Note that all of these cases involve demuxed content. When\n * content is muxed, the audio and video are packaged together, therefore syncing\n * separate media playlists is not an issue.\n *\n * CASE 1: Audio prepares to load a new timeline before video:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:                     ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader              ^\n *\n * In the above example, the audio loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the video loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the audio loader goes ahead and loads and appends the 6th segment before the video\n * loader crosses the discontinuity, then when appended, the 6th audio segment will use\n * the timestamp offset from timeline 0. This will likely lead to desyncing. In addition,\n * the audio loader must provide the audioAppendStart value to trim the content in the\n * transmuxer, and that value relies on the audio timestamp offset. Since the audio\n * timestamp offset is set by the video (main) loader, the audio loader shouldn't load the\n * segment until that value is provided.\n *\n * CASE 2: Video prepares to load a new timeline before audio:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:             ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader                      ^\n *\n * In the above example, the video loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the audio loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the video loader goes ahead and loads and appends the 6th segment, then once the\n * segment is loaded and processed, both the video and audio timestamp offsets will be\n * set, since video is used as the primary timing source. This is to ensure content lines\n * up appropriately, as any modifications to the video timing are reflected by audio when\n * the video loader sets the audio and video timestamp offsets to the same value. However,\n * setting the timestamp offset for audio before audio has had a chance to change\n * timelines will likely lead to desyncing, as the audio loader will append segment 5 with\n * a timestamp intended to apply to segments from timeline 1 rather than timeline 0.\n *\n * CASE 3: When seeking, audio prepares to load a new timeline before video\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:           ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader            ^\n *\n * In the above example, both audio and video loaders are loading segments from timeline\n * 0, but imagine that the seek originated from timeline 1.\n *\n * When seeking to a new timeline, the timestamp offset will be set based on the expected\n * segment start of the loaded video segment. In order to maintain sync, the audio loader\n * must wait for the video loader to load its segment and update both the audio and video\n * timestamp offsets before it may load and append its own segment. This is the case\n * whether the seek results in a mismatched segment request (e.g., the audio loader\n * chooses to load segment 3 and the video loader chooses to load segment 4) or the\n * loaders choose to load the same segment index from each playlist, as the segments may\n * not be aligned perfectly, even for matching segment indexes.\n *\n * @param {Object} timelinechangeController\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} segmentTimeline\n *        The timeline of the segment being loaded\n * @param {('main'|'audio')} loaderType\n *        The loader type\n * @param {boolean} audioDisabled\n *        Whether the audio is disabled for the loader. This should only be true when the\n *        loader may have muxed audio in its segment, but should not append it, e.g., for\n *        the main loader when an alternate audio playlist is active.\n *\n * @return {boolean}\n *         Whether the loader should wait for a timeline change from the timeline change\n *         controller before processing the segment\n */\n\nvar shouldWaitForTimelineChange = function shouldWaitForTimelineChange(_ref2) {\n  var timelineChangeController = _ref2.timelineChangeController,\n      currentTimeline = _ref2.currentTimeline,\n      segmentTimeline = _ref2.segmentTimeline,\n      loaderType = _ref2.loaderType,\n      audioDisabled = _ref2.audioDisabled;\n\n  if (currentTimeline === segmentTimeline) {\n    return false;\n  }\n\n  if (loaderType === 'audio') {\n    var lastMainTimelineChange = timelineChangeController.lastTimelineChange({\n      type: 'main'\n    }); // Audio loader should wait if:\n    //\n    // * main hasn't had a timeline change yet (thus has not loaded its first segment)\n    // * main hasn't yet changed to the timeline audio is looking to load\n\n    return !lastMainTimelineChange || lastMainTimelineChange.to !== segmentTimeline;\n  } // The main loader only needs to wait for timeline changes if there's demuxed audio.\n  // Otherwise, there's nothing to wait for, since audio would be muxed into the main\n  // loader's segments (or the content is audio/video only and handled by the main\n  // loader).\n\n\n  if (loaderType === 'main' && audioDisabled) {\n    var pendingAudioTimelineChange = timelineChangeController.pendingTimelineChange({\n      type: 'audio'\n    }); // Main loader should wait for the audio loader if audio is not pending a timeline\n    // change to the current timeline.\n    //\n    // Since the main loader is responsible for setting the timestamp offset for both\n    // audio and video, the main loader must wait for audio to be about to change to its\n    // timeline before setting the offset, otherwise, if audio is behind in loading,\n    // segments from the previous timeline would be adjusted by the new timestamp offset.\n    //\n    // This requirement means that video will not cross a timeline until the audio is\n    // about to cross to it, so that way audio and video will always cross the timeline\n    // together.\n    //\n    // In addition to normal timeline changes, these rules also apply to the start of a\n    // stream (going from a non-existent timeline, -1, to timeline 0). It's important\n    // that these rules apply to the first timeline change because if they did not, it's\n    // possible that the main loader will cross two timelines before the audio loader has\n    // crossed one. Logic may be implemented to handle the startup as a special case, but\n    // it's easier to simply treat all timeline changes the same.\n\n    if (pendingAudioTimelineChange && pendingAudioTimelineChange.to === segmentTimeline) {\n      return false;\n    }\n\n    return true;\n  }\n\n  return false;\n};\nvar mediaDuration = function mediaDuration(timingInfos) {\n  var maxDuration = 0;\n  ['video', 'audio'].forEach(function (type) {\n    var typeTimingInfo = timingInfos[type + \"TimingInfo\"];\n\n    if (!typeTimingInfo) {\n      return;\n    }\n\n    var start = typeTimingInfo.start,\n        end = typeTimingInfo.end;\n    var duration;\n\n    if (typeof start === 'bigint' || typeof end === 'bigint') {\n      duration = window$1.BigInt(end) - window$1.BigInt(start);\n    } else if (typeof start === 'number' && typeof end === 'number') {\n      duration = end - start;\n    }\n\n    if (typeof duration !== 'undefined' && duration > maxDuration) {\n      maxDuration = duration;\n    }\n  }); // convert back to a number if it is lower than MAX_SAFE_INTEGER\n  // as we only need BigInt when we are above that.\n\n  if (typeof maxDuration === 'bigint' && maxDuration < Number.MAX_SAFE_INTEGER) {\n    maxDuration = Number(maxDuration);\n  }\n\n  return maxDuration;\n};\nvar segmentTooLong = function segmentTooLong(_ref3) {\n  var segmentDuration = _ref3.segmentDuration,\n      maxDuration = _ref3.maxDuration;\n\n  // 0 duration segments are most likely due to metadata only segments or a lack of\n  // information.\n  if (!segmentDuration) {\n    return false;\n  } // For HLS:\n  //\n  // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1\n  // The EXTINF duration of each Media Segment in the Playlist\n  // file, when rounded to the nearest integer, MUST be less than or equal\n  // to the target duration; longer segments can trigger playback stalls\n  // or other errors.\n  //\n  // For DASH, the mpd-parser uses the largest reported segment duration as the target\n  // duration. Although that reported duration is occasionally approximate (i.e., not\n  // exact), a strict check may report that a segment is too long more often in DASH.\n\n\n  return Math.round(segmentDuration) > maxDuration + TIME_FUDGE_FACTOR;\n};\nvar getTroublesomeSegmentDurationMessage = function getTroublesomeSegmentDurationMessage(segmentInfo, sourceType) {\n  // Right now we aren't following DASH's timing model exactly, so only perform\n  // this check for HLS content.\n  if (sourceType !== 'hls') {\n    return null;\n  }\n\n  var segmentDuration = mediaDuration({\n    audioTimingInfo: segmentInfo.audioTimingInfo,\n    videoTimingInfo: segmentInfo.videoTimingInfo\n  }); // Don't report if we lack information.\n  //\n  // If the segment has a duration of 0 it is either a lack of information or a\n  // metadata only segment and shouldn't be reported here.\n\n  if (!segmentDuration) {\n    return null;\n  }\n\n  var targetDuration = segmentInfo.playlist.targetDuration;\n  var isSegmentWayTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration * 2\n  });\n  var isSegmentSlightlyTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration\n  });\n  var segmentTooLongMessage = \"Segment with index \" + segmentInfo.mediaIndex + \" \" + (\"from playlist \" + segmentInfo.playlist.id + \" \") + (\"has a duration of \" + segmentDuration + \" \") + (\"when the reported duration is \" + segmentInfo.duration + \" \") + (\"and the target duration is \" + targetDuration + \". \") + 'For HLS content, a duration in excess of the target duration may result in ' + 'playback issues. See the HLS specification section on EXT-X-TARGETDURATION for ' + 'more details: ' + 'https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1';\n\n  if (isSegmentWayTooLong || isSegmentSlightlyTooLong) {\n    return {\n      severity: isSegmentWayTooLong ? 'warn' : 'info',\n      message: segmentTooLongMessage\n    };\n  }\n\n  return null;\n};\n/**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\nvar SegmentLoader = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SegmentLoader, _videojs$EventTarget);\n\n  function SegmentLoader(settings, options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // check pre-conditions\n\n    if (!settings) {\n      throw new TypeError('Initialization settings are required');\n    }\n\n    if (typeof settings.currentTime !== 'function') {\n      throw new TypeError('No currentTime getter specified');\n    }\n\n    if (!settings.mediaSource) {\n      throw new TypeError('No MediaSource specified');\n    } // public properties\n\n\n    _this.bandwidth = settings.bandwidth;\n    _this.throughput = {\n      rate: 0,\n      count: 0\n    };\n    _this.roundTrip = NaN;\n\n    _this.resetStats_();\n\n    _this.mediaIndex = null;\n    _this.partIndex = null; // private settings\n\n    _this.hasPlayed_ = settings.hasPlayed;\n    _this.currentTime_ = settings.currentTime;\n    _this.seekable_ = settings.seekable;\n    _this.seeking_ = settings.seeking;\n    _this.duration_ = settings.duration;\n    _this.mediaSource_ = settings.mediaSource;\n    _this.vhs_ = settings.vhs;\n    _this.loaderType_ = settings.loaderType;\n    _this.currentMediaInfo_ = void 0;\n    _this.startingMediaInfo_ = void 0;\n    _this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n    _this.goalBufferLength_ = settings.goalBufferLength;\n    _this.sourceType_ = settings.sourceType;\n    _this.sourceUpdater_ = settings.sourceUpdater;\n    _this.inbandTextTracks_ = settings.inbandTextTracks;\n    _this.state_ = 'INIT';\n    _this.timelineChangeController_ = settings.timelineChangeController;\n    _this.shouldSaveSegmentTimingInfo_ = true;\n    _this.parse708captions_ = settings.parse708captions;\n    _this.useDtsForTimestampOffset_ = settings.useDtsForTimestampOffset;\n    _this.captionServices_ = settings.captionServices;\n    _this.experimentalExactManifestTimings = settings.experimentalExactManifestTimings; // private instance variables\n\n    _this.checkBufferTimeout_ = null;\n    _this.error_ = void 0;\n    _this.currentTimeline_ = -1;\n    _this.pendingSegment_ = null;\n    _this.xhrOptions_ = null;\n    _this.pendingSegments_ = [];\n    _this.audioDisabled_ = false;\n    _this.isPendingTimestampOffset_ = false; // TODO possibly move gopBuffer and timeMapping info to a separate controller\n\n    _this.gopBuffer_ = [];\n    _this.timeMapping_ = 0;\n    _this.safeAppend_ = videojs.browser.IE_VERSION >= 11;\n    _this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    _this.playlistOfLastInitSegment_ = {\n      audio: null,\n      video: null\n    };\n    _this.callQueue_ = []; // If the segment loader prepares to load a segment, but does not have enough\n    // information yet to start the loading process (e.g., if the audio loader wants to\n    // load a segment from the next timeline but the main loader hasn't yet crossed that\n    // timeline), then the load call will be added to the queue until it is ready to be\n    // processed.\n\n    _this.loadQueue_ = [];\n    _this.metadataQueue_ = {\n      id3: [],\n      caption: []\n    };\n    _this.waitingOnRemove_ = false;\n    _this.quotaExceededErrorRetryTimeout_ = null; // Fragmented mp4 playback\n\n    _this.activeInitSegmentId_ = null;\n    _this.initSegments_ = {}; // HLSe playback\n\n    _this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;\n    _this.keyCache_ = {};\n    _this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings\n    // between a time in the display time and a segment index within\n    // a playlist\n\n    _this.syncController_ = settings.syncController;\n    _this.syncPoint_ = {\n      segmentIndex: 0,\n      time: 0\n    };\n    _this.transmuxer_ = _this.createTransmuxer_();\n\n    _this.triggerSyncInfoUpdate_ = function () {\n      return _this.trigger('syncinfoupdate');\n    };\n\n    _this.syncController_.on('syncinfoupdate', _this.triggerSyncInfoUpdate_);\n\n    _this.mediaSource_.addEventListener('sourceopen', function () {\n      if (!_this.isEndOfStream_()) {\n        _this.ended_ = false;\n      }\n    }); // ...for determining the fetch location\n\n\n    _this.fetchAtBuffer_ = false;\n    _this.logger_ = logger(\"SegmentLoader[\" + _this.loaderType_ + \"]\");\n    Object.defineProperty(_assertThisInitialized(_this), 'state', {\n      get: function get() {\n        return this.state_;\n      },\n      set: function set(newState) {\n        if (newState !== this.state_) {\n          this.logger_(this.state_ + \" -> \" + newState);\n          this.state_ = newState;\n          this.trigger('statechange');\n        }\n      }\n    });\n\n    _this.sourceUpdater_.on('ready', function () {\n      if (_this.hasEnoughInfoToAppend_()) {\n        _this.processCallQueue_();\n      }\n    }); // Only the main loader needs to listen for pending timeline changes, as the main\n    // loader should wait for audio to be ready to change its timeline so that both main\n    // and audio timelines change together. For more details, see the\n    // shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'main') {\n      _this.timelineChangeController_.on('pendingtimelinechange', function () {\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    } // The main loader only listens on pending timeline changes, but the audio loader,\n    // since its loads follow main, needs to listen on timeline changes. For more details,\n    // see the shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'audio') {\n      _this.timelineChangeController_.on('timelinechange', function () {\n        if (_this.hasEnoughInfoToLoad_()) {\n          _this.processLoadQueue_();\n        }\n\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    }\n\n    return _this;\n  }\n\n  var _proto = SegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    return segmentTransmuxer.createTransmuxer({\n      remux: false,\n      alignGopsAtEnd: this.safeAppend_,\n      keepOriginalTimestamps: true,\n      parse708captions: this.parse708captions_,\n      captionServices: this.captionServices_\n    });\n  }\n  /**\n   * reset all of our media stats\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetStats_ = function resetStats_() {\n    this.mediaBytesTransferred = 0;\n    this.mediaRequests = 0;\n    this.mediaRequestsAborted = 0;\n    this.mediaRequestsTimedout = 0;\n    this.mediaRequestsErrored = 0;\n    this.mediaTransferDuration = 0;\n    this.mediaSecondsLoaded = 0;\n    this.mediaAppends = 0;\n  }\n  /**\n   * dispose of the SegmentLoader and reset to the default state\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.state = 'DISPOSED';\n    this.pause();\n    this.abort_();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.terminate();\n    }\n\n    this.resetStats_();\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    if (this.syncController_ && this.triggerSyncInfoUpdate_) {\n      this.syncController_.off('syncinfoupdate', this.triggerSyncInfoUpdate_);\n    }\n\n    this.off();\n  };\n\n  _proto.setAudio = function setAudio(enable) {\n    this.audioDisabled_ = !enable;\n\n    if (enable) {\n      this.appendInitSegment_.audio = true;\n    } else {\n      // remove current track audio if it gets disabled\n      this.sourceUpdater_.removeAudio(0, this.duration_());\n    }\n  }\n  /**\n   * abort anything that is currently doing on with the SegmentLoader\n   * and reset to a default state\n   */\n  ;\n\n  _proto.abort = function abort() {\n    if (this.state !== 'WAITING') {\n      if (this.pendingSegment_) {\n        this.pendingSegment_ = null;\n      }\n\n      return;\n    }\n\n    this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY\n    // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n    // when the request is aborted. This will prevent the loader from being stuck in the\n    // WAITING state indefinitely.\n\n    this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the\n    // next segment\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * abort all pending xhr requests and null any pending segements\n   *\n   * @private\n   */\n  ;\n\n  _proto.abort_ = function abort_() {\n    if (this.pendingSegment_ && this.pendingSegment_.abortRequests) {\n      this.pendingSegment_.abortRequests();\n    } // clear out the segment being processed\n\n\n    this.pendingSegment_ = null;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_);\n    this.waitingOnRemove_ = false;\n    window$1.clearTimeout(this.quotaExceededErrorRetryTimeout_);\n    this.quotaExceededErrorRetryTimeout_ = null;\n  };\n\n  _proto.checkForAbort_ = function checkForAbort_(requestId) {\n    // If the state is APPENDING, then aborts will not modify the state, meaning the first\n    // callback that happens should reset the state to READY so that loading can continue.\n    if (this.state === 'APPENDING' && !this.pendingSegment_) {\n      this.state = 'READY';\n      return true;\n    }\n\n    if (!this.pendingSegment_ || this.pendingSegment_.requestId !== requestId) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * set an error on the segment loader and null out any pending segements\n   *\n   * @param {Error} error the error to set on the SegmentLoader\n   * @return {Error} the error that was set or that is currently set\n   */\n  ;\n\n  _proto.error = function error(_error) {\n    if (typeof _error !== 'undefined') {\n      this.logger_('error occurred:', _error);\n      this.error_ = _error;\n    }\n\n    this.pendingSegment_ = null;\n    return this.error_;\n  };\n\n  _proto.endOfStream = function endOfStream() {\n    this.ended_ = true;\n\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.gopBuffer_.length = 0;\n    this.pause();\n    this.trigger('ended');\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    var trackInfo = this.getMediaInfo_();\n\n    if (!this.sourceUpdater_ || !trackInfo) {\n      return videojs.createTimeRanges();\n    }\n\n    if (this.loaderType_ === 'main') {\n      var hasAudio = trackInfo.hasAudio,\n          hasVideo = trackInfo.hasVideo,\n          isMuxed = trackInfo.isMuxed;\n\n      if (hasVideo && hasAudio && !this.audioDisabled_ && !isMuxed) {\n        return this.sourceUpdater_.buffered();\n      }\n\n      if (hasVideo) {\n        return this.sourceUpdater_.videoBuffered();\n      }\n    } // One case that can be ignored for now is audio only with alt audio,\n    // as we don't yet have proper support for that.\n\n\n    return this.sourceUpdater_.audioBuffered();\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: map.bytes,\n        tracks: map.tracks,\n        timescales: map.timescales\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Gets and sets key for the provided key\n   *\n   * @param {Object} key\n   *        The key object representing the key to get or set\n   * @param {boolean=} set\n   *        If true, the key for the provided key should be saved\n   * @return {Object}\n   *         Key object for desired key\n   */\n  ;\n\n  _proto.segmentKey = function segmentKey(key, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!key) {\n      return null;\n    }\n\n    var id = segmentKeyId(key);\n    var storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3\n\n    if (this.cacheEncryptionKeys_ && set && !storedKey && key.bytes) {\n      this.keyCache_[id] = storedKey = {\n        resolvedUri: key.resolvedUri,\n        bytes: key.bytes\n      };\n    }\n\n    var result = {\n      resolvedUri: (storedKey || key).resolvedUri\n    };\n\n    if (storedKey) {\n      result.bytes = storedKey.bytes;\n    }\n\n    return result;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && !this.paused();\n  }\n  /**\n   * load a playlist and start to fill the buffer\n   */\n  ;\n\n  _proto.load = function load() {\n    // un-pause\n    this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be\n    // specified\n\n    if (!this.playlist_) {\n      return;\n    } // if all the configuration is ready, initialize and begin loading\n\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    } // if we're in the middle of processing a segment already, don't\n    // kick off an additional segment request\n\n\n    if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n      return;\n    }\n\n    this.state = 'READY';\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY'; // if this is the audio segment loader, and it hasn't been inited before, then any old\n    // audio data from the muxed content should be removed\n\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * set a playlist on the segment loader\n   *\n   * @param {PlaylistLoader} media the playlist to set on the segment loader\n   */\n  ;\n\n  _proto.playlist = function playlist(newPlaylist, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!newPlaylist) {\n      return;\n    }\n\n    var oldPlaylist = this.playlist_;\n    var segmentInfo = this.pendingSegment_;\n    this.playlist_ = newPlaylist;\n    this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist\n    // is always our zero-time so force a sync update each time the playlist\n    // is refreshed from the server\n    //\n    // Use the INIT state to determine if playback has started, as the playlist sync info\n    // should be fixed once requests begin (as sync points are generated based on sync\n    // info), but not before then.\n\n    if (this.state === 'INIT') {\n      newPlaylist.syncInfo = {\n        mediaSequence: newPlaylist.mediaSequence,\n        time: 0\n      }; // Setting the date time mapping means mapping the program date time (if available)\n      // to time 0 on the player's timeline. The playlist's syncInfo serves a similar\n      // purpose, mapping the initial mediaSequence to time zero. Since the syncInfo can\n      // be updated as the playlist is refreshed before the loader starts loading, the\n      // program date time mapping needs to be updated as well.\n      //\n      // This mapping is only done for the main loader because a program date time should\n      // map equivalently between playlists.\n\n      if (this.loaderType_ === 'main') {\n        this.syncController_.setDateTimeMappingForStart(newPlaylist);\n      }\n    }\n\n    var oldId = null;\n\n    if (oldPlaylist) {\n      if (oldPlaylist.id) {\n        oldId = oldPlaylist.id;\n      } else if (oldPlaylist.uri) {\n        oldId = oldPlaylist.uri;\n      }\n    }\n\n    this.logger_(\"playlist update [\" + oldId + \" => \" + (newPlaylist.id || newPlaylist.uri) + \"]\"); // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n    // in LIVE, we always want to update with new playlists (including refreshes)\n\n    this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    }\n\n    if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n      if (this.mediaIndex !== null) {\n        // we must reset/resync the segment loader when we switch renditions and\n        // the segment loader is already synced to the previous rendition\n        // on playlist changes we want it to be possible to fetch\n        // at the buffer for vod but not for live. So we use resetLoader\n        // for live and resyncLoader for vod. We want this because\n        // if a playlist uses independent and non-independent segments/parts the\n        // buffer may not accurately reflect the next segment that we should try\n        // downloading.\n        if (!newPlaylist.endList) {\n          this.resetLoader();\n        } else {\n          this.resyncLoader();\n        }\n      }\n\n      this.currentMediaInfo_ = void 0;\n      this.trigger('playlistupdate'); // the rest of this function depends on `oldPlaylist` being defined\n\n      return;\n    } // we reloaded the same playlist so we are in a live scenario\n    // and we will likely need to adjust the mediaIndex\n\n\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n    this.logger_(\"live window shift [\" + mediaSequenceDiff + \"]\"); // update the mediaIndex on the SegmentLoader\n    // this is important because we can abort a request and this value must be\n    // equal to the last appended mediaIndex\n\n    if (this.mediaIndex !== null) {\n      this.mediaIndex -= mediaSequenceDiff; // this can happen if we are going to load the first segment, but get a playlist\n      // update during that. mediaIndex would go from 0 to -1 if mediaSequence in the\n      // new playlist was incremented by 1.\n\n      if (this.mediaIndex < 0) {\n        this.mediaIndex = null;\n        this.partIndex = null;\n      } else {\n        var segment = this.playlist_.segments[this.mediaIndex]; // partIndex should remain the same for the same segment\n        // unless parts fell off of the playlist for this segment.\n        // In that case we need to reset partIndex and resync\n\n        if (this.partIndex && (!segment.parts || !segment.parts.length || !segment.parts[this.partIndex])) {\n          var mediaIndex = this.mediaIndex;\n          this.logger_(\"currently processing part (index \" + this.partIndex + \") no longer exists.\");\n          this.resetLoader(); // We want to throw away the partIndex and the data associated with it,\n          // as the part was dropped from our current playlists segment.\n          // The mediaIndex will still be valid so keep that around.\n\n          this.mediaIndex = mediaIndex;\n        }\n      }\n    } // update the mediaIndex on the SegmentInfo object\n    // this is important because we will update this.mediaIndex with this value\n    // in `handleAppendsDone_` after the segment has been successfully appended\n\n\n    if (segmentInfo) {\n      segmentInfo.mediaIndex -= mediaSequenceDiff;\n\n      if (segmentInfo.mediaIndex < 0) {\n        segmentInfo.mediaIndex = null;\n        segmentInfo.partIndex = null;\n      } else {\n        // we need to update the referenced segment so that timing information is\n        // saved for the new playlist's segment, however, if the segment fell off the\n        // playlist, we can leave the old reference and just lose the timing info\n        if (segmentInfo.mediaIndex >= 0) {\n          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n        }\n\n        if (segmentInfo.partIndex >= 0 && segmentInfo.segment.parts) {\n          segmentInfo.part = segmentInfo.segment.parts[segmentInfo.partIndex];\n        }\n      }\n    }\n\n    this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n  }\n  /**\n   * Prevent the loader from fetching additional segments. If there\n   * is a segment request outstanding, it will finish processing\n   * before the loader halts. A segment loader can be unpaused by\n   * calling load().\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n      this.checkBufferTimeout_ = null;\n    }\n  }\n  /**\n   * Returns whether the segment loader is fetching additional\n   * segments when given the opportunity. This property can be\n   * modified through calls to pause() and load().\n   */\n  ;\n\n  _proto.paused = function paused() {\n    return this.checkBufferTimeout_ === null;\n  }\n  /**\n   * Delete all the buffered data and reset the SegmentLoader\n   *\n   * @param {Function} [done] an optional callback to be executed when the remove\n   * operation is complete\n   */\n  ;\n\n  _proto.resetEverything = function resetEverything(done) {\n    this.ended_ = false;\n    this.activeInitSegmentId_ = null;\n    this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    this.resetLoader(); // remove from 0, the earliest point, to Infinity, to signify removal of everything.\n    // VTT Segment Loader doesn't need to do anything but in the regular SegmentLoader,\n    // we then clamp the value to duration if necessary.\n\n    this.remove(0, Infinity, done); // clears fmp4 captions\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearAllMp4Captions'\n      }); // reset the cache in the transmuxer\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n    }\n  }\n  /**\n   * Force the SegmentLoader to resync and start loading around the currentTime instead\n   * of starting at the end of the buffer\n   *\n   * Useful for fast quality changes\n   */\n  ;\n\n  _proto.resetLoader = function resetLoader() {\n    this.fetchAtBuffer_ = false;\n    this.resyncLoader();\n  }\n  /**\n   * Force the SegmentLoader to restart synchronization and make a conservative guess\n   * before returning to the simple walk-forward method\n   */\n  ;\n\n  _proto.resyncLoader = function resyncLoader() {\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.mediaIndex = null;\n    this.partIndex = null;\n    this.syncPoint_ = null;\n    this.isPendingTimestampOffset_ = false;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.abort();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   * @param {Function} [done] - an optional callback to be executed when the remove\n   * @param {boolean} force - force all remove operations to happen\n   * operation is complete\n   */\n  ;\n\n  _proto.remove = function remove(start, end, done, force) {\n    if (done === void 0) {\n      done = function done() {};\n    }\n\n    if (force === void 0) {\n      force = false;\n    }\n\n    // clamp end to duration if we need to remove everything.\n    // This is due to a browser bug that causes issues if we remove to Infinity.\n    // videojs/videojs-contrib-hls#1225\n    if (end === Infinity) {\n      end = this.duration_();\n    } // skip removes that would throw an error\n    // commonly happens during a rendition switch at the start of a video\n    // from start 0 to end 0\n\n\n    if (end <= start) {\n      this.logger_('skipping remove because end ${end} is <= start ${start}');\n      return;\n    }\n\n    if (!this.sourceUpdater_ || !this.getMediaInfo_()) {\n      this.logger_('skipping remove because no source updater or starting media info'); // nothing to remove if we haven't processed any media\n\n      return;\n    } // set it to one to complete this function's removes\n\n\n    var removesRemaining = 1;\n\n    var removeFinished = function removeFinished() {\n      removesRemaining--;\n\n      if (removesRemaining === 0) {\n        done();\n      }\n    };\n\n    if (force || !this.audioDisabled_) {\n      removesRemaining++;\n      this.sourceUpdater_.removeAudio(start, end, removeFinished);\n    } // While it would be better to only remove video if the main loader has video, this\n    // should be safe with audio only as removeVideo will call back even if there's no\n    // video buffer.\n    //\n    // In theory we can check to see if there's video before calling the remove, but in\n    // the event that we're switching between renditions and from video to audio only\n    // (when we add support for that), we may need to clear the video contents despite\n    // what the new media will contain.\n\n\n    if (force || this.loaderType_ === 'main') {\n      this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n      removesRemaining++;\n      this.sourceUpdater_.removeVideo(start, end, removeFinished);\n    } // remove any captions and ID3 tags\n\n\n    for (var track in this.inbandTextTracks_) {\n      removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_); // finished this function's removes\n\n    removeFinished();\n  }\n  /**\n   * (re-)schedule monitorBufferTick_ to run as soon as possible\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBuffer_ = function monitorBuffer_() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), 1);\n  }\n  /**\n   * As long as the SegmentLoader is in the READY state, periodically\n   * invoke fillBuffer_().\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBufferTick_ = function monitorBufferTick_() {\n    if (this.state === 'READY') {\n      this.fillBuffer_();\n    }\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    // TODO since the source buffer maintains a queue, and we shouldn't call this function\n    // except when we're ready for the next segment, this check can most likely be removed\n    if (this.sourceUpdater_.updating()) {\n      return;\n    } // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      this.isPendingTimestampOffset_ = false;\n      this.timelineChangeController_.pendingTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      });\n    }\n\n    this.loadSegment_(segmentInfo);\n  }\n  /**\n   * Determines if we should call endOfStream on the media source based\n   * on the state of the buffer or if appened segment was the final\n   * segment in the playlist.\n   *\n   * @param {number} [mediaIndex] the media index of segment we last appended\n   * @param {Object} [playlist] a media playlist object\n   * @return {boolean} do we need to call endOfStream on the MediaSource\n   */\n  ;\n\n  _proto.isEndOfStream_ = function isEndOfStream_(mediaIndex, playlist, partIndex) {\n    if (mediaIndex === void 0) {\n      mediaIndex = this.mediaIndex;\n    }\n\n    if (playlist === void 0) {\n      playlist = this.playlist_;\n    }\n\n    if (partIndex === void 0) {\n      partIndex = this.partIndex;\n    }\n\n    if (!playlist || !this.mediaSource_) {\n      return false;\n    }\n\n    var segment = typeof mediaIndex === 'number' && playlist.segments[mediaIndex]; // mediaIndex is zero based but length is 1 based\n\n    var appendedLastSegment = mediaIndex + 1 === playlist.segments.length; // true if there are no parts, or this is the last part.\n\n    var appendedLastPart = !segment || !segment.parts || partIndex + 1 === segment.parts.length; // if we've buffered to the end of the video, we need to call endOfStream\n    // so that MediaSources can trigger the `ended` event when it runs out of\n    // buffered data instead of waiting for me\n\n    return playlist.endList && this.mediaSource_.readyState === 'open' && appendedLastSegment && appendedLastPart;\n  }\n  /**\n   * Determines what request should be made given current segment loader state.\n   *\n   * @return {Object} a request object that describes the segment/part to load\n   */\n  ;\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    var buffered = this.buffered_();\n    var bufferedEnd = lastBufferedEnd(buffered) || 0;\n    var bufferedTime = timeAheadOf(buffered, this.currentTime_());\n    var preloaded = !this.hasPlayed_() && bufferedTime >= 1;\n    var haveEnoughBuffer = bufferedTime >= this.goalBufferLength_();\n    var segments = this.playlist_.segments; // return no segment if:\n    // 1. we don't have segments\n    // 2. The video has not yet played and we already downloaded a segment\n    // 3. we already have enough buffered time\n\n    if (!segments.length || preloaded || haveEnoughBuffer) {\n      return null;\n    }\n\n    this.syncPoint_ = this.syncPoint_ || this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n    var next = {\n      partIndex: null,\n      mediaIndex: null,\n      startOfSegment: null,\n      playlist: this.playlist_,\n      isSyncRequest: Boolean(!this.syncPoint_)\n    };\n\n    if (next.isSyncRequest) {\n      next.mediaIndex = getSyncSegmentCandidate(this.currentTimeline_, segments, bufferedEnd);\n    } else if (this.mediaIndex !== null) {\n      var segment = segments[this.mediaIndex];\n      var partIndex = typeof this.partIndex === 'number' ? this.partIndex : -1;\n      next.startOfSegment = segment.end ? segment.end : bufferedEnd;\n\n      if (segment.parts && segment.parts[partIndex + 1]) {\n        next.mediaIndex = this.mediaIndex;\n        next.partIndex = partIndex + 1;\n      } else {\n        next.mediaIndex = this.mediaIndex + 1;\n      }\n    } else {\n      // Find the segment containing the end of the buffer or current time.\n      var _Playlist$getMediaInf = Playlist.getMediaInfoForTime({\n        experimentalExactManifestTimings: this.experimentalExactManifestTimings,\n        playlist: this.playlist_,\n        currentTime: this.fetchAtBuffer_ ? bufferedEnd : this.currentTime_(),\n        startingPartIndex: this.syncPoint_.partIndex,\n        startingSegmentIndex: this.syncPoint_.segmentIndex,\n        startTime: this.syncPoint_.time\n      }),\n          segmentIndex = _Playlist$getMediaInf.segmentIndex,\n          startTime = _Playlist$getMediaInf.startTime,\n          _partIndex = _Playlist$getMediaInf.partIndex;\n\n      next.getMediaInfoForTime = this.fetchAtBuffer_ ? \"bufferedEnd \" + bufferedEnd : \"currentTime \" + this.currentTime_();\n      next.mediaIndex = segmentIndex;\n      next.startOfSegment = startTime;\n      next.partIndex = _partIndex;\n    }\n\n    var nextSegment = segments[next.mediaIndex];\n    var nextPart = nextSegment && typeof next.partIndex === 'number' && nextSegment.parts && nextSegment.parts[next.partIndex]; // if the next segment index is invalid or\n    // the next partIndex is invalid do not choose a next segment.\n\n    if (!nextSegment || typeof next.partIndex === 'number' && !nextPart) {\n      return null;\n    } // if the next segment has parts, and we don't have a partIndex.\n    // Set partIndex to 0\n\n\n    if (typeof next.partIndex !== 'number' && nextSegment.parts) {\n      next.partIndex = 0;\n      nextPart = nextSegment.parts[0];\n    } // if we have no buffered data then we need to make sure\n    // that the next part we append is \"independent\" if possible.\n    // So we check if the previous part is independent, and request\n    // it if it is.\n\n\n    if (!bufferedTime && nextPart && !nextPart.independent) {\n      if (next.partIndex === 0) {\n        var lastSegment = segments[next.mediaIndex - 1];\n        var lastSegmentLastPart = lastSegment.parts && lastSegment.parts.length && lastSegment.parts[lastSegment.parts.length - 1];\n\n        if (lastSegmentLastPart && lastSegmentLastPart.independent) {\n          next.mediaIndex -= 1;\n          next.partIndex = lastSegment.parts.length - 1;\n          next.independent = 'previous segment';\n        }\n      } else if (nextSegment.parts[next.partIndex - 1].independent) {\n        next.partIndex -= 1;\n        next.independent = 'previous part';\n      }\n    }\n\n    var ended = this.mediaSource_ && this.mediaSource_.readyState === 'ended'; // do not choose a next segment if all of the following:\n    // 1. this is the last segment in the playlist\n    // 2. end of stream has been called on the media source already\n    // 3. the player is not seeking\n\n    if (next.mediaIndex >= segments.length - 1 && ended && !this.seeking_()) {\n      return null;\n    }\n\n    return this.generateSegmentInfo_(next);\n  };\n\n  _proto.generateSegmentInfo_ = function generateSegmentInfo_(options) {\n    var independent = options.independent,\n        playlist = options.playlist,\n        mediaIndex = options.mediaIndex,\n        startOfSegment = options.startOfSegment,\n        isSyncRequest = options.isSyncRequest,\n        partIndex = options.partIndex,\n        forceTimestampOffset = options.forceTimestampOffset,\n        getMediaInfoForTime = options.getMediaInfoForTime;\n    var segment = playlist.segments[mediaIndex];\n    var part = typeof partIndex === 'number' && segment.parts[partIndex];\n    var segmentInfo = {\n      requestId: 'segment-loader-' + Math.random(),\n      // resolve the segment URL relative to the playlist\n      uri: part && part.resolvedUri || segment.resolvedUri,\n      // the segment's mediaIndex at the time it was requested\n      mediaIndex: mediaIndex,\n      partIndex: part ? partIndex : null,\n      // whether or not to update the SegmentLoader's state with this\n      // segment's mediaIndex\n      isSyncRequest: isSyncRequest,\n      startOfSegment: startOfSegment,\n      // the segment's playlist\n      playlist: playlist,\n      // unencrypted bytes of the segment\n      bytes: null,\n      // when a key is defined for this segment, the encrypted bytes\n      encryptedBytes: null,\n      // The target timestampOffset for this segment when we append it\n      // to the source buffer\n      timestampOffset: null,\n      // The timeline that the segment is in\n      timeline: segment.timeline,\n      // The expected duration of the segment in seconds\n      duration: part && part.duration || segment.duration,\n      // retain the segment in case the playlist updates while doing an async process\n      segment: segment,\n      part: part,\n      byteLength: 0,\n      transmuxer: this.transmuxer_,\n      // type of getMediaInfoForTime that was used to get this segment\n      getMediaInfoForTime: getMediaInfoForTime,\n      independent: independent\n    };\n    var overrideCheck = typeof forceTimestampOffset !== 'undefined' ? forceTimestampOffset : this.isPendingTimestampOffset_;\n    segmentInfo.timestampOffset = this.timestampOffsetForSegment_({\n      segmentTimeline: segment.timeline,\n      currentTimeline: this.currentTimeline_,\n      startOfSegment: startOfSegment,\n      buffered: this.buffered_(),\n      overrideCheck: overrideCheck\n    });\n    var audioBufferedEnd = lastBufferedEnd(this.sourceUpdater_.audioBuffered());\n\n    if (typeof audioBufferedEnd === 'number') {\n      // since the transmuxer is using the actual timing values, but the buffer is\n      // adjusted by the timestamp offset, we must adjust the value here\n      segmentInfo.audioAppendStart = audioBufferedEnd - this.sourceUpdater_.audioTimestampOffset();\n    }\n\n    if (this.sourceUpdater_.videoBuffered().length) {\n      segmentInfo.gopsToAlignWith = gopsSafeToAlignWith(this.gopBuffer_, // since the transmuxer is using the actual timing values, but the time is\n      // adjusted by the timestmap offset, we must adjust the value here\n      this.currentTime_() - this.sourceUpdater_.videoTimestampOffset(), this.timeMapping_);\n    }\n\n    return segmentInfo;\n  } // get the timestampoffset for a segment,\n  // added so that vtt segment loader can override and prevent\n  // adding timestamp offsets.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_(options) {\n    return timestampOffsetForSegment(options);\n  }\n  /**\n   * Determines if the network has enough bandwidth to complete the current segment\n   * request in a timely manner. If not, the request will be aborted early and bandwidth\n   * updated to trigger a playlist switch.\n   *\n   * @param {Object} stats\n   *        Object containing stats about the request timing and size\n   * @private\n   */\n  ;\n\n  _proto.earlyAbortWhenNeeded_ = function earlyAbortWhenNeeded_(stats) {\n    if (this.vhs_.tech_.paused() || // Don't abort if the current playlist is on the lowestEnabledRendition\n    // TODO: Replace using timeout with a boolean indicating whether this playlist is\n    //       the lowestEnabledRendition.\n    !this.xhrOptions_.timeout || // Don't abort if we have no bandwidth information to estimate segment sizes\n    !this.playlist_.attributes.BANDWIDTH) {\n      return;\n    } // Wait at least 1 second since the first byte of data has been received before\n    // using the calculated bandwidth from the progress event to allow the bitrate\n    // to stabilize\n\n\n    if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n      return;\n    }\n\n    var currentTime = this.currentTime_();\n    var measuredBandwidth = stats.bandwidth;\n    var segmentDuration = this.pendingSegment_.duration;\n    var requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n    // if we are only left with less than 1 second when the request completes.\n    // A negative timeUntilRebuffering indicates we are already rebuffering\n\n    var timeUntilRebuffer$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.vhs_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download\n    // is larger than the estimated time until the player runs out of forward buffer\n\n    if (requestTimeRemaining <= timeUntilRebuffer$1) {\n      return;\n    }\n\n    var switchCandidate = minRebufferMaxBandwidthSelector({\n      master: this.vhs_.playlists.master,\n      currentTime: currentTime,\n      bandwidth: measuredBandwidth,\n      duration: this.duration_(),\n      segmentDuration: segmentDuration,\n      timeUntilRebuffer: timeUntilRebuffer$1,\n      currentTimeline: this.currentTimeline_,\n      syncController: this.syncController_\n    });\n\n    if (!switchCandidate) {\n      return;\n    }\n\n    var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$1;\n    var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n    var minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the\n    // potential round trip time of the new request so that we are not too aggressive\n    // with switching to a playlist that might save us a fraction of a second.\n\n    if (timeUntilRebuffer$1 <= TIME_FUDGE_FACTOR) {\n      minimumTimeSaving = 1;\n    }\n\n    if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n      return;\n    } // set the bandwidth to that of the desired playlist being sure to scale by\n    // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n    // don't trigger a bandwidthupdate as the bandwidth is artifial\n\n\n    this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;\n    this.trigger('earlyabort');\n  };\n\n  _proto.handleAbort_ = function handleAbort_(segmentInfo) {\n    this.logger_(\"Aborting \" + segmentInfoString(segmentInfo));\n    this.mediaRequestsAborted += 1;\n  }\n  /**\n   * XHR `progress` event handler\n   *\n   * @param {Event}\n   *        The XHR `progress` event\n   * @param {Object} simpleSegment\n   *        A simplified segment object copy\n   * @private\n   */\n  ;\n\n  _proto.handleProgress_ = function handleProgress_(event, simpleSegment) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    this.trigger('progress');\n  };\n\n  _proto.handleTrackInfo_ = function handleTrackInfo_(simpleSegment, trackInfo) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    if (this.checkForIllegalMediaSwitch(trackInfo)) {\n      return;\n    }\n\n    trackInfo = trackInfo || {}; // When we have track info, determine what media types this loader is dealing with.\n    // Guard against cases where we're not getting track info at all until we are\n    // certain that all streams will provide it.\n\n    if (!shallowEqual(this.currentMediaInfo_, trackInfo)) {\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n      this.startingMediaInfo_ = trackInfo;\n      this.currentMediaInfo_ = trackInfo;\n      this.logger_('trackinfo update', trackInfo);\n      this.trigger('trackinfo');\n    } // trackinfo may cause an abort if the trackinfo\n    // causes a codec change to an unsupported codec.\n\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // set trackinfo on the pending segment so that\n    // it can append.\n\n\n    this.pendingSegment_.trackInfo = trackInfo; // check if any calls were waiting on the track info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleTimingInfo_ = function handleTimingInfo_(simpleSegment, mediaType, timeType, time) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var timingInfoProperty = timingInfoPropertyForMedia(mediaType);\n    segmentInfo[timingInfoProperty] = segmentInfo[timingInfoProperty] || {};\n    segmentInfo[timingInfoProperty][timeType] = time;\n    this.logger_(\"timinginfo: \" + mediaType + \" - \" + timeType + \" - \" + time); // check if any calls were waiting on the timing info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleCaptions_ = function handleCaptions_(simpleSegment, captionData) {\n    var _this2 = this;\n\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // This could only happen with fmp4 segments, but\n    // should still not happen in general\n\n\n    if (captionData.length === 0) {\n      this.logger_('SegmentLoader received no captions from a caption event');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Wait until we have some video data so that caption timing\n    // can be adjusted by the timestamp offset\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.caption.push(this.handleCaptions_.bind(this, simpleSegment, captionData));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset();\n    var captionTracks = {}; // get total start/end and captions for each track/stream\n\n    captionData.forEach(function (caption) {\n      // caption.stream is actually a track name...\n      // set to the existing values in tracks or default values\n      captionTracks[caption.stream] = captionTracks[caption.stream] || {\n        // Infinity, as any other value will be less than this\n        startTime: Infinity,\n        captions: [],\n        // 0 as an other value will be more than this\n        endTime: 0\n      };\n      var captionTrack = captionTracks[caption.stream];\n      captionTrack.startTime = Math.min(captionTrack.startTime, caption.startTime + timestampOffset);\n      captionTrack.endTime = Math.max(captionTrack.endTime, caption.endTime + timestampOffset);\n      captionTrack.captions.push(caption);\n    });\n    Object.keys(captionTracks).forEach(function (trackName) {\n      var _captionTracks$trackN = captionTracks[trackName],\n          startTime = _captionTracks$trackN.startTime,\n          endTime = _captionTracks$trackN.endTime,\n          captions = _captionTracks$trackN.captions;\n      var inbandTextTracks = _this2.inbandTextTracks_;\n\n      _this2.logger_(\"adding cues from \" + startTime + \" -> \" + endTime + \" for \" + trackName);\n\n      createCaptionsTrackIfNotExists(inbandTextTracks, _this2.vhs_.tech_, trackName); // clear out any cues that start and end at the same time period for the same track.\n      // We do this because a rendition change that also changes the timescale for captions\n      // will result in captions being re-parsed for certain segments. If we add them again\n      // without clearing we will have two of the same captions visible.\n\n      removeCuesFromTrack(startTime, endTime, inbandTextTracks[trackName]);\n      addCaptionData({\n        captionArray: captions,\n        inbandTextTracks: inbandTextTracks,\n        timestampOffset: timestampOffset\n      });\n    }); // Reset stored captions since we added parsed\n    // captions to a text track at this point\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  };\n\n  _proto.handleId3_ = function handleId3_(simpleSegment, id3Frames, dispatchType) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // we need to have appended data in order for the timestamp offset to be set\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.id3.push(this.handleId3_.bind(this, simpleSegment, id3Frames, dispatchType));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset(); // There's potentially an issue where we could double add metadata if there's a muxed\n    // audio/video source with a metadata track, and an alt audio with a metadata track.\n    // However, this probably won't happen, and if it does it can be handled then.\n\n    createMetadataTrackIfNotExists(this.inbandTextTracks_, dispatchType, this.vhs_.tech_);\n    addMetadata({\n      inbandTextTracks: this.inbandTextTracks_,\n      metadataArray: id3Frames,\n      timestampOffset: timestampOffset,\n      videoDuration: this.duration_()\n    });\n  };\n\n  _proto.processMetadataQueue_ = function processMetadataQueue_() {\n    this.metadataQueue_.id3.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.caption.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n  };\n\n  _proto.processCallQueue_ = function processCallQueue_() {\n    var callQueue = this.callQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.callQueue_ = [];\n    callQueue.forEach(function (fun) {\n      return fun();\n    });\n  };\n\n  _proto.processLoadQueue_ = function processLoadQueue_() {\n    var loadQueue = this.loadQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.loadQueue_ = [];\n    loadQueue.forEach(function (fun) {\n      return fun();\n    });\n  }\n  /**\n   * Determines whether the loader has enough info to load the next segment.\n   *\n   * @return {boolean}\n   *         Whether or not the loader has enough info to load the next segment\n   */\n  ;\n\n  _proto.hasEnoughInfoToLoad_ = function hasEnoughInfoToLoad_() {\n    // Since primary timing goes by video, only the audio loader potentially needs to wait\n    // to load.\n    if (this.loaderType_ !== 'audio') {\n      return true;\n    }\n\n    var segmentInfo = this.pendingSegment_; // A fill buffer must have already run to establish a pending segment before there's\n    // enough info to load.\n\n    if (!segmentInfo) {\n      return false;\n    } // The first segment can and should be loaded immediately so that source buffers are\n    // created together (before appending). Source buffer creation uses the presence of\n    // audio and video data to determine whether to create audio/video source buffers, and\n    // uses processed (transmuxed or parsed) media to determine the types required.\n\n\n    if (!this.getCurrentMediaInfo_()) {\n      return true;\n    }\n\n    if ( // Technically, instead of waiting to load a segment on timeline changes, a segment\n    // can be requested and downloaded and only wait before it is transmuxed or parsed.\n    // But in practice, there are a few reasons why it is better to wait until a loader\n    // is ready to append that segment before requesting and downloading:\n    //\n    // 1. Because audio and main loaders cross discontinuities together, if this loader\n    //    is waiting for the other to catch up, then instead of requesting another\n    //    segment and using up more bandwidth, by not yet loading, more bandwidth is\n    //    allotted to the loader currently behind.\n    // 2. media-segment-request doesn't have to have logic to consider whether a segment\n    // is ready to be processed or not, isolating the queueing behavior to the loader.\n    // 3. The audio loader bases some of its segment properties on timing information\n    //    provided by the main loader, meaning that, if the logic for waiting on\n    //    processing was in media-segment-request, then it would also need to know how\n    //    to re-generate the segment information after the main loader caught up.\n    shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCurrentMediaInfo_ = function getCurrentMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return segmentInfo && segmentInfo.trackInfo || this.currentMediaInfo_;\n  };\n\n  _proto.getMediaInfo_ = function getMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return this.getCurrentMediaInfo_(segmentInfo) || this.startingMediaInfo_;\n  };\n\n  _proto.getPendingSegmentPlaylist = function getPendingSegmentPlaylist() {\n    return this.pendingSegment_ ? this.pendingSegment_.playlist : null;\n  };\n\n  _proto.hasEnoughInfoToAppend_ = function hasEnoughInfoToAppend_() {\n    if (!this.sourceUpdater_.ready()) {\n      return false;\n    } // If content needs to be removed or the loader is waiting on an append reattempt,\n    // then no additional content should be appended until the prior append is resolved.\n\n\n    if (this.waitingOnRemove_ || this.quotaExceededErrorRetryTimeout_) {\n      return false;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var trackInfo = this.getCurrentMediaInfo_(); // no segment to append any data for or\n    // we do not have information on this specific\n    // segment yet\n\n    if (!segmentInfo || !trackInfo) {\n      return false;\n    }\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n\n    if (hasVideo && !segmentInfo.videoTimingInfo) {\n      return false;\n    } // muxed content only relies on video timing information for now.\n\n\n    if (hasAudio && !this.audioDisabled_ && !isMuxed && !segmentInfo.audioTimingInfo) {\n      return false;\n    }\n\n    if (shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.handleData_ = function handleData_(simpleSegment, result) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // If there's anything in the call queue, then this data came later and should be\n    // executed after the calls currently queued.\n\n\n    if (this.callQueue_.length || !this.hasEnoughInfoToAppend_()) {\n      this.callQueue_.push(this.handleData_.bind(this, simpleSegment, result));\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // update the time mapping so we can translate from display time to media time\n\n    this.setTimeMapping_(segmentInfo.timeline); // for tracking overall stats\n\n    this.updateMediaSecondsLoaded_(segmentInfo.part || segmentInfo.segment); // Note that the state isn't changed from loading to appending. This is because abort\n    // logic may change behavior depending on the state, and changing state too early may\n    // inflate our estimates of bandwidth. In the future this should be re-examined to\n    // note more granular states.\n    // don't process and append data if the mediaSource is closed\n\n    if (this.mediaSource_.readyState === 'closed') {\n      return;\n    } // if this request included an initialization segment, save that data\n    // to the initSegment cache\n\n\n    if (simpleSegment.map) {\n      simpleSegment.map = this.initSegmentForMap(simpleSegment.map, true); // move over init segment properties to media request\n\n      segmentInfo.segment.map = simpleSegment.map;\n    } // if this request included a segment key, save that data in the cache\n\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    segmentInfo.isFmp4 = simpleSegment.isFmp4;\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n\n    if (segmentInfo.isFmp4) {\n      this.trigger('fmp4');\n      segmentInfo.timingInfo.start = segmentInfo[timingInfoPropertyForMedia(result.type)].start;\n    } else {\n      var trackInfo = this.getCurrentMediaInfo_();\n      var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n      var firstVideoFrameTimeForData;\n\n      if (useVideoTimingInfo) {\n        firstVideoFrameTimeForData = segmentInfo.videoTimingInfo.start;\n      } // Segment loader knows more about segment timing than the transmuxer (in certain\n      // aspects), so make any changes required for a more accurate start time.\n      // Don't set the end time yet, as the segment may not be finished processing.\n\n\n      segmentInfo.timingInfo.start = this.trueSegmentStart_({\n        currentStart: segmentInfo.timingInfo.start,\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex,\n        currentVideoTimestampOffset: this.sourceUpdater_.videoTimestampOffset(),\n        useVideoTimingInfo: useVideoTimingInfo,\n        firstVideoFrameTimeForData: firstVideoFrameTimeForData,\n        videoTimingInfo: segmentInfo.videoTimingInfo,\n        audioTimingInfo: segmentInfo.audioTimingInfo\n      });\n    } // Init segments for audio and video only need to be appended in certain cases. Now\n    // that data is about to be appended, we can check the final cases to determine\n    // whether we should append an init segment.\n\n\n    this.updateAppendInitSegmentStatus(segmentInfo, result.type); // Timestamp offset should be updated once we get new data and have its timing info,\n    // as we use the start of the segment to offset the best guess (playlist provided)\n    // timestamp offset.\n\n    this.updateSourceBufferTimestampOffset_(segmentInfo); // if this is a sync request we need to determine whether it should\n    // be appended or not.\n\n    if (segmentInfo.isSyncRequest) {\n      // first save/update our timing info for this segment.\n      // this is what allows us to choose an accurate segment\n      // and the main reason we make a sync request.\n      this.updateTimingInfoEnd_(segmentInfo);\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n      var next = this.chooseNextRequest_(); // If the sync request isn't the segment that would be requested next\n      // after taking into account its timing info, do not append it.\n\n      if (next.mediaIndex !== segmentInfo.mediaIndex || next.partIndex !== segmentInfo.partIndex) {\n        this.logger_('sync segment was incorrect, not appending');\n        return;\n      } // otherwise append it like any other segment as our guess was correct.\n\n\n      this.logger_('sync segment was correct, appending');\n    } // Save some state so that in the future anything waiting on first append (and/or\n    // timestamp offset(s)) can process immediately. While the extra state isn't optimal,\n    // we need some notion of whether the timestamp offset or other relevant information\n    // has had a chance to be set.\n\n\n    segmentInfo.hasAppendedData_ = true; // Now that the timestamp offset should be set, we can append any waiting ID3 tags.\n\n    this.processMetadataQueue_();\n    this.appendData_(segmentInfo, result);\n  };\n\n  _proto.updateAppendInitSegmentStatus = function updateAppendInitSegmentStatus(segmentInfo, type) {\n    // alt audio doesn't manage timestamp offset\n    if (this.loaderType_ === 'main' && typeof segmentInfo.timestampOffset === 'number' && // in the case that we're handling partial data, we don't want to append an init\n    // segment for each chunk\n    !segmentInfo.changedTimestampOffset) {\n      // if the timestamp offset changed, the timeline may have changed, so we have to re-\n      // append init segments\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n    }\n\n    if (this.playlistOfLastInitSegment_[type] !== segmentInfo.playlist) {\n      // make sure we append init segment on playlist changes, in case the media config\n      // changed\n      this.appendInitSegment_[type] = true;\n    }\n  };\n\n  _proto.getInitSegmentAndUpdateState_ = function getInitSegmentAndUpdateState_(_ref4) {\n    var type = _ref4.type,\n        initSegment = _ref4.initSegment,\n        map = _ref4.map,\n        playlist = _ref4.playlist;\n\n    // \"The EXT-X-MAP tag specifies how to obtain the Media Initialization Section\n    // (Section 3) required to parse the applicable Media Segments.  It applies to every\n    // Media Segment that appears after it in the Playlist until the next EXT-X-MAP tag\n    // or until the end of the playlist.\"\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.5\n    if (map) {\n      var id = initSegmentId(map);\n\n      if (this.activeInitSegmentId_ === id) {\n        // don't need to re-append the init segment if the ID matches\n        return null;\n      } // a map-specified init segment takes priority over any transmuxed (or otherwise\n      // obtained) init segment\n      //\n      // this also caches the init segment for later use\n\n\n      initSegment = this.initSegmentForMap(map, true).bytes;\n      this.activeInitSegmentId_ = id;\n    } // We used to always prepend init segments for video, however, that shouldn't be\n    // necessary. Instead, we should only append on changes, similar to what we've always\n    // done for audio. This is more important (though may not be that important) for\n    // frame-by-frame appending for LHLS, simply because of the increased quantity of\n    // appends.\n\n\n    if (initSegment && this.appendInitSegment_[type]) {\n      // Make sure we track the playlist that we last used for the init segment, so that\n      // we can re-append the init segment in the event that we get data from a new\n      // playlist. Discontinuities and track changes are handled in other sections.\n      this.playlistOfLastInitSegment_[type] = playlist; // Disable future init segment appends for this type. Until a change is necessary.\n\n      this.appendInitSegment_[type] = false; // we need to clear out the fmp4 active init segment id, since\n      // we are appending the muxer init segment\n\n      this.activeInitSegmentId_ = null;\n      return initSegment;\n    }\n\n    return null;\n  };\n\n  _proto.handleQuotaExceededError_ = function handleQuotaExceededError_(_ref5, error) {\n    var _this3 = this;\n\n    var segmentInfo = _ref5.segmentInfo,\n        type = _ref5.type,\n        bytes = _ref5.bytes;\n    var audioBuffered = this.sourceUpdater_.audioBuffered();\n    var videoBuffered = this.sourceUpdater_.videoBuffered(); // For now we're ignoring any notion of gaps in the buffer, but they, in theory,\n    // should be cleared out during the buffer removals. However, log in case it helps\n    // debug.\n\n    if (audioBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: ' + timeRangesToArray(audioBuffered).join(', '));\n    }\n\n    if (videoBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: ' + timeRangesToArray(videoBuffered).join(', '));\n    }\n\n    var audioBufferStart = audioBuffered.length ? audioBuffered.start(0) : 0;\n    var audioBufferEnd = audioBuffered.length ? audioBuffered.end(audioBuffered.length - 1) : 0;\n    var videoBufferStart = videoBuffered.length ? videoBuffered.start(0) : 0;\n    var videoBufferEnd = videoBuffered.length ? videoBuffered.end(videoBuffered.length - 1) : 0;\n\n    if (audioBufferEnd - audioBufferStart <= MIN_BACK_BUFFER && videoBufferEnd - videoBufferStart <= MIN_BACK_BUFFER) {\n      // Can't remove enough buffer to make room for new segment (or the browser doesn't\n      // allow for appends of segments this size). In the future, it may be possible to\n      // split up the segment and append in pieces, but for now, error out this playlist\n      // in an attempt to switch to a more manageable rendition.\n      this.logger_('On QUOTA_EXCEEDED_ERR, single segment too large to append to ' + 'buffer, triggering an error. ' + (\"Appended byte length: \" + bytes.byteLength + \", \") + (\"audio buffer: \" + timeRangesToArray(audioBuffered).join(', ') + \", \") + (\"video buffer: \" + timeRangesToArray(videoBuffered).join(', ') + \", \"));\n      this.error({\n        message: 'Quota exceeded error with append of a single segment of content',\n        excludeUntil: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // To try to resolve the quota exceeded error, clear back buffer and retry. This means\n    // that the segment-loader should block on future events until this one is handled, so\n    // that it doesn't keep moving onto further segments. Adding the call to the call\n    // queue will prevent further appends until waitingOnRemove_ and\n    // quotaExceededErrorRetryTimeout_ are cleared.\n    //\n    // Note that this will only block the current loader. In the case of demuxed content,\n    // the other load may keep filling as fast as possible. In practice, this should be\n    // OK, as it is a rare case when either audio has a high enough bitrate to fill up a\n    // source buffer, or video fills without enough room for audio to append (and without\n    // the availability of clearing out seconds of back buffer to make room for audio).\n    // But it might still be good to handle this case in the future as a TODO.\n\n\n    this.waitingOnRemove_ = true;\n    this.callQueue_.push(this.appendToSourceBuffer_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n    var currentTime = this.currentTime_(); // Try to remove as much audio and video as possible to make room for new content\n    // before retrying.\n\n    var timeToRemoveUntil = currentTime - MIN_BACK_BUFFER;\n    this.logger_(\"On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to \" + timeToRemoveUntil);\n    this.remove(0, timeToRemoveUntil, function () {\n      _this3.logger_(\"On QUOTA_EXCEEDED_ERR, retrying append in \" + MIN_BACK_BUFFER + \"s\");\n\n      _this3.waitingOnRemove_ = false; // wait the length of time alotted in the back buffer to prevent wasted\n      // attempts (since we can't clear less than the minimum)\n\n      _this3.quotaExceededErrorRetryTimeout_ = window$1.setTimeout(function () {\n        _this3.logger_('On QUOTA_EXCEEDED_ERR, re-processing call queue');\n\n        _this3.quotaExceededErrorRetryTimeout_ = null;\n\n        _this3.processCallQueue_();\n      }, MIN_BACK_BUFFER * 1000);\n    }, true);\n  };\n\n  _proto.handleAppendError_ = function handleAppendError_(_ref6, error) {\n    var segmentInfo = _ref6.segmentInfo,\n        type = _ref6.type,\n        bytes = _ref6.bytes;\n\n    // if there's no error, nothing to do\n    if (!error) {\n      return;\n    }\n\n    if (error.code === QUOTA_EXCEEDED_ERR) {\n      this.handleQuotaExceededError_({\n        segmentInfo: segmentInfo,\n        type: type,\n        bytes: bytes\n      }); // A quota exceeded error should be recoverable with a future re-append, so no need\n      // to trigger an append error.\n\n      return;\n    }\n\n    this.logger_('Received non QUOTA_EXCEEDED_ERR on append', error);\n    this.error(type + \" append of \" + bytes.length + \"b failed for segment \" + (\"#\" + segmentInfo.mediaIndex + \" in playlist \" + segmentInfo.playlist.id)); // If an append errors, we often can't recover.\n    // (see https://w3c.github.io/media-source/#sourcebuffer-append-error).\n    //\n    // Trigger a special error so that it can be handled separately from normal,\n    // recoverable errors.\n\n    this.trigger('appenderror');\n  };\n\n  _proto.appendToSourceBuffer_ = function appendToSourceBuffer_(_ref7) {\n    var segmentInfo = _ref7.segmentInfo,\n        type = _ref7.type,\n        initSegment = _ref7.initSegment,\n        data = _ref7.data,\n        bytes = _ref7.bytes;\n\n    // If this is a re-append, bytes were already created and don't need to be recreated\n    if (!bytes) {\n      var segments = [data];\n      var byteLength = data.byteLength;\n\n      if (initSegment) {\n        // if the media initialization segment is changing, append it before the content\n        // segment\n        segments.unshift(initSegment);\n        byteLength += initSegment.byteLength;\n      } // Technically we should be OK appending the init segment separately, however, we\n      // haven't yet tested that, and prepending is how we have always done things.\n\n\n      bytes = concatSegments({\n        bytes: byteLength,\n        segments: segments\n      });\n    }\n\n    this.sourceUpdater_.appendBuffer({\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }, this.handleAppendError_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n  };\n\n  _proto.handleSegmentTimingInfo_ = function handleSegmentTimingInfo_(type, requestId, segmentTimingInfo) {\n    if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {\n      return;\n    }\n\n    var segment = this.pendingSegment_.segment;\n    var timingInfoProperty = type + \"TimingInfo\";\n\n    if (!segment[timingInfoProperty]) {\n      segment[timingInfoProperty] = {};\n    }\n\n    segment[timingInfoProperty].transmuxerPrependedSeconds = segmentTimingInfo.prependedContentDuration || 0;\n    segment[timingInfoProperty].transmuxedPresentationStart = segmentTimingInfo.start.presentation;\n    segment[timingInfoProperty].transmuxedDecodeStart = segmentTimingInfo.start.decode;\n    segment[timingInfoProperty].transmuxedPresentationEnd = segmentTimingInfo.end.presentation;\n    segment[timingInfoProperty].transmuxedDecodeEnd = segmentTimingInfo.end.decode; // mainly used as a reference for debugging\n\n    segment[timingInfoProperty].baseMediaDecodeTime = segmentTimingInfo.baseMediaDecodeTime;\n  };\n\n  _proto.appendData_ = function appendData_(segmentInfo, result) {\n    var type = result.type,\n        data = result.data;\n\n    if (!data || !data.byteLength) {\n      return;\n    }\n\n    if (type === 'audio' && this.audioDisabled_) {\n      return;\n    }\n\n    var initSegment = this.getInitSegmentAndUpdateState_({\n      type: type,\n      initSegment: result.initSegment,\n      playlist: segmentInfo.playlist,\n      map: segmentInfo.isFmp4 ? segmentInfo.segment.map : null\n    });\n    this.appendToSourceBuffer_({\n      segmentInfo: segmentInfo,\n      type: type,\n      initSegment: initSegment,\n      data: data\n    });\n  }\n  /**\n   * load a specific segment from a request into the buffer\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadSegment_ = function loadSegment_(segmentInfo) {\n    var _this4 = this;\n\n    this.state = 'WAITING';\n    this.pendingSegment_ = segmentInfo;\n    this.trimBackBuffer_(segmentInfo);\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      if (this.transmuxer_) {\n        this.transmuxer_.postMessage({\n          action: 'clearAllMp4Captions'\n        });\n      }\n    }\n\n    if (!this.hasEnoughInfoToLoad_()) {\n      this.loadQueue_.push(function () {\n        // regenerate the audioAppendStart, timestampOffset, etc as they\n        // may have changed since this function was added to the queue.\n        var options = _extends({}, segmentInfo, {\n          forceTimestampOffset: true\n        });\n\n        _extends(segmentInfo, _this4.generateSegmentInfo_(options));\n\n        _this4.isPendingTimestampOffset_ = false;\n\n        _this4.updateTransmuxerAndRequestSegment_(segmentInfo);\n      });\n      return;\n    }\n\n    this.updateTransmuxerAndRequestSegment_(segmentInfo);\n  };\n\n  _proto.updateTransmuxerAndRequestSegment_ = function updateTransmuxerAndRequestSegment_(segmentInfo) {\n    var _this5 = this;\n\n    // We'll update the source buffer's timestamp offset once we have transmuxed data, but\n    // the transmuxer still needs to be updated before then.\n    //\n    // Even though keepOriginalTimestamps is set to true for the transmuxer, timestamp\n    // offset must be passed to the transmuxer for stream correcting adjustments.\n    if (this.shouldUpdateTransmuxerTimestampOffset_(segmentInfo.timestampOffset)) {\n      this.gopBuffer_.length = 0; // gopsToAlignWith was set before the GOP buffer was cleared\n\n      segmentInfo.gopsToAlignWith = [];\n      this.timeMapping_ = 0; // reset values in the transmuxer since a discontinuity should start fresh\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n      this.transmuxer_.postMessage({\n        action: 'setTimestampOffset',\n        timestampOffset: segmentInfo.timestampOffset\n      });\n    }\n\n    var simpleSegment = this.createSimplifiedSegmentObj_(segmentInfo);\n    var isEndOfStream = this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex);\n    var isWalkingForward = this.mediaIndex !== null;\n    var isDiscontinuity = segmentInfo.timeline !== this.currentTimeline_ && // currentTimeline starts at -1, so we shouldn't end the timeline switching to 0,\n    // the first timeline\n    segmentInfo.timeline > 0;\n    var isEndOfTimeline = isEndOfStream || isWalkingForward && isDiscontinuity;\n    this.logger_(\"Requesting \" + segmentInfoString(segmentInfo)); // If there's an init segment associated with this segment, but it is not cached (identified by a lack of bytes),\n    // then this init segment has never been seen before and should be appended.\n    //\n    // At this point the content type (audio/video or both) is not yet known, but it should be safe to set\n    // both to true and leave the decision of whether to append the init segment to append time.\n\n    if (simpleSegment.map && !simpleSegment.map.bytes) {\n      this.logger_('going to request init segment.');\n      this.appendInitSegment_ = {\n        video: true,\n        audio: true\n      };\n    }\n\n    segmentInfo.abortRequests = mediaSegmentRequest({\n      xhr: this.vhs_.xhr,\n      xhrOptions: this.xhrOptions_,\n      decryptionWorker: this.decrypter_,\n      segment: simpleSegment,\n      abortFn: this.handleAbort_.bind(this, segmentInfo),\n      progressFn: this.handleProgress_.bind(this),\n      trackInfoFn: this.handleTrackInfo_.bind(this),\n      timingInfoFn: this.handleTimingInfo_.bind(this),\n      videoSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'video', segmentInfo.requestId),\n      audioSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'audio', segmentInfo.requestId),\n      captionsFn: this.handleCaptions_.bind(this),\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: function endedTimelineFn() {\n        _this5.logger_('received endedtimeline callback');\n      },\n      id3Fn: this.handleId3_.bind(this),\n      dataFn: this.handleData_.bind(this),\n      doneFn: this.segmentRequestFinished_.bind(this),\n      onTransmuxerLog: function onTransmuxerLog(_ref8) {\n        var message = _ref8.message,\n            level = _ref8.level,\n            stream = _ref8.stream;\n\n        _this5.logger_(segmentInfoString(segmentInfo) + \" logged from transmuxer stream \" + stream + \" as a \" + level + \": \" + message);\n      }\n    });\n  }\n  /**\n   * trim the back buffer so that we don't have too much data\n   * in the source buffer\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   */\n  ;\n\n  _proto.trimBackBuffer_ = function trimBackBuffer_(segmentInfo) {\n    var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of\n    // buffer and a very conservative \"garbage collector\"\n    // We manually clear out the old buffer to ensure\n    // we don't trigger the QuotaExceeded error\n    // on the source buffer during subsequent appends\n\n    if (removeToTime > 0) {\n      this.remove(0, removeToTime);\n    }\n  }\n  /**\n   * created a simplified copy of the segment object with just the\n   * information necessary to perform the XHR and decryption\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   * @return {Object} a simplified segment object copy\n   */\n  ;\n\n  _proto.createSimplifiedSegmentObj_ = function createSimplifiedSegmentObj_(segmentInfo) {\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var simpleSegment = {\n      resolvedUri: part ? part.resolvedUri : segment.resolvedUri,\n      byterange: part ? part.byterange : segment.byterange,\n      requestId: segmentInfo.requestId,\n      transmuxer: segmentInfo.transmuxer,\n      audioAppendStart: segmentInfo.audioAppendStart,\n      gopsToAlignWith: segmentInfo.gopsToAlignWith,\n      part: segmentInfo.part\n    };\n    var previousSegment = segmentInfo.playlist.segments[segmentInfo.mediaIndex - 1];\n\n    if (previousSegment && previousSegment.timeline === segment.timeline) {\n      // The baseStartTime of a segment is used to handle rollover when probing the TS\n      // segment to retrieve timing information. Since the probe only looks at the media's\n      // times (e.g., PTS and DTS values of the segment), and doesn't consider the\n      // player's time (e.g., player.currentTime()), baseStartTime should reflect the\n      // media time as well. transmuxedDecodeEnd represents the end time of a segment, in\n      // seconds of media time, so should be used here. The previous segment is used since\n      // the end of the previous segment should represent the beginning of the current\n      // segment, so long as they are on the same timeline.\n      if (previousSegment.videoTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.videoTimingInfo.transmuxedDecodeEnd;\n      } else if (previousSegment.audioTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.audioTimingInfo.transmuxedDecodeEnd;\n      }\n    }\n\n    if (segment.key) {\n      // if the media sequence is greater than 2^32, the IV will be incorrect\n      // assuming 10s segments, that would be about 1300 years\n      var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n      simpleSegment.key = this.segmentKey(segment.key);\n      simpleSegment.key.iv = iv;\n    }\n\n    if (segment.map) {\n      simpleSegment.map = this.initSegmentForMap(segment.map);\n    }\n\n    return simpleSegment;\n  };\n\n  _proto.saveTransferStats_ = function saveTransferStats_(stats) {\n    // every request counts as a media request even if it has been aborted\n    // or canceled due to a timeout\n    this.mediaRequests += 1;\n\n    if (stats) {\n      this.mediaBytesTransferred += stats.bytesReceived;\n      this.mediaTransferDuration += stats.roundTripTime;\n    }\n  };\n\n  _proto.saveBandwidthRelatedStats_ = function saveBandwidthRelatedStats_(duration, stats) {\n    // byteLength will be used for throughput, and should be based on bytes receieved,\n    // which we only know at the end of the request and should reflect total bytes\n    // downloaded rather than just bytes processed from components of the segment\n    this.pendingSegment_.byteLength = stats.bytesReceived;\n\n    if (duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's bandwidth because its duration of \" + duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    this.bandwidth = stats.bandwidth;\n    this.roundTrip = stats.roundTripTime;\n  };\n\n  _proto.handleTimeout_ = function handleTimeout_() {\n    // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functinality between segment loaders\n    this.mediaRequestsTimedout += 1;\n    this.bandwidth = 1;\n    this.roundTrip = NaN;\n    this.trigger('bandwidthupdate');\n    this.trigger('timeout');\n  }\n  /**\n   * Handle the callback from the segmentRequest function and set the\n   * associated SegmentLoader state and errors if necessary\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    // TODO handle special cases, e.g., muxed audio/video but only audio in the segment\n    // check the call queue directly since this function doesn't need to deal with any\n    // data, and can continue even if the source buffers are not set up and we didn't get\n    // any data from the segment\n    if (this.callQueue_.length) {\n      this.callQueue_.push(this.segmentRequestFinished_.bind(this, error, simpleSegment, result));\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // The request was aborted and the SegmentLoader has already been reset\n\n    if (!this.pendingSegment_) {\n      return;\n    } // the request was aborted and the SegmentLoader has already started\n    // another request. this can happen when the timeout for an aborted\n    // request triggers due to a limitation in the XHR library\n    // do not count this as any sort of request or we risk double-counting\n\n\n    if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n      return;\n    } // an error occurred from the active pendingSegment_ so reset everything\n\n\n    if (error) {\n      this.pendingSegment_ = null;\n      this.state = 'READY'; // aborts are not a true error condition and nothing corrective needs to be done\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        return;\n      }\n\n      this.pause(); // the error is really just that at least one of the requests timed-out\n      // set the bandwidth to a very low value and trigger an ABR switch to\n      // take emergency action\n\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n        return;\n      } // if control-flow has arrived here, then the error is real\n      // emit an error event to blacklist the current playlist\n\n\n      this.mediaRequestsErrored += 1;\n      this.error(error);\n      this.trigger('error');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // the response was a success so set any bandwidth stats the request\n    // generated for ABR purposes\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);\n    segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;\n\n    if (result.gopInfo) {\n      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, result.gopInfo, this.safeAppend_);\n    } // Although we may have already started appending on progress, we shouldn't switch the\n    // state away from loading until we are officially done loading the segment data.\n\n\n    this.state = 'APPENDING'; // used for testing\n\n    this.trigger('appending');\n    this.waitForAppendsToComplete_(segmentInfo);\n  };\n\n  _proto.setTimeMapping_ = function setTimeMapping_(timeline) {\n    var timelineMapping = this.syncController_.mappingForTimeline(timeline);\n\n    if (timelineMapping !== null) {\n      this.timeMapping_ = timelineMapping;\n    }\n  };\n\n  _proto.updateMediaSecondsLoaded_ = function updateMediaSecondsLoaded_(segment) {\n    if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n      this.mediaSecondsLoaded += segment.end - segment.start;\n    } else {\n      this.mediaSecondsLoaded += segment.duration;\n    }\n  };\n\n  _proto.shouldUpdateTransmuxerTimestampOffset_ = function shouldUpdateTransmuxerTimestampOffset_(timestampOffset) {\n    if (timestampOffset === null) {\n      return false;\n    } // note that we're potentially using the same timestamp offset for both video and\n    // audio\n\n\n    if (this.loaderType_ === 'main' && timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      return true;\n    }\n\n    if (!this.audioDisabled_ && timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.trueSegmentStart_ = function trueSegmentStart_(_ref9) {\n    var currentStart = _ref9.currentStart,\n        playlist = _ref9.playlist,\n        mediaIndex = _ref9.mediaIndex,\n        firstVideoFrameTimeForData = _ref9.firstVideoFrameTimeForData,\n        currentVideoTimestampOffset = _ref9.currentVideoTimestampOffset,\n        useVideoTimingInfo = _ref9.useVideoTimingInfo,\n        videoTimingInfo = _ref9.videoTimingInfo,\n        audioTimingInfo = _ref9.audioTimingInfo;\n\n    if (typeof currentStart !== 'undefined') {\n      // if start was set once, keep using it\n      return currentStart;\n    }\n\n    if (!useVideoTimingInfo) {\n      return audioTimingInfo.start;\n    }\n\n    var previousSegment = playlist.segments[mediaIndex - 1]; // The start of a segment should be the start of the first full frame contained\n    // within that segment. Since the transmuxer maintains a cache of incomplete data\n    // from and/or the last frame seen, the start time may reflect a frame that starts\n    // in the previous segment. Check for that case and ensure the start time is\n    // accurate for the segment.\n\n    if (mediaIndex === 0 || !previousSegment || typeof previousSegment.start === 'undefined' || previousSegment.end !== firstVideoFrameTimeForData + currentVideoTimestampOffset) {\n      return firstVideoFrameTimeForData;\n    }\n\n    return videoTimingInfo.start;\n  };\n\n  _proto.waitForAppendsToComplete_ = function waitForAppendsToComplete_(segmentInfo) {\n    var trackInfo = this.getCurrentMediaInfo_(segmentInfo);\n\n    if (!trackInfo) {\n      this.error({\n        message: 'No starting media returned, likely due to an unsupported media format.',\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // Although transmuxing is done, appends may not yet be finished. Throw a marker\n    // on each queue this loader is responsible for to ensure that the appends are\n    // complete.\n\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n    var waitForVideo = this.loaderType_ === 'main' && hasVideo;\n    var waitForAudio = !this.audioDisabled_ && hasAudio && !isMuxed;\n    segmentInfo.waitingOnAppends = 0; // segments with no data\n\n    if (!segmentInfo.hasAppendedData_) {\n      if (!segmentInfo.timingInfo && typeof segmentInfo.timestampOffset === 'number') {\n        // When there's no audio or video data in the segment, there's no audio or video\n        // timing information.\n        //\n        // If there's no audio or video timing information, then the timestamp offset\n        // can't be adjusted to the appropriate value for the transmuxer and source\n        // buffers.\n        //\n        // Therefore, the next segment should be used to set the timestamp offset.\n        this.isPendingTimestampOffset_ = true;\n      } // override settings for metadata only segments\n\n\n      segmentInfo.timingInfo = {\n        start: 0\n      };\n      segmentInfo.waitingOnAppends++;\n\n      if (!this.isPendingTimestampOffset_) {\n        // update the timestampoffset\n        this.updateSourceBufferTimestampOffset_(segmentInfo); // make sure the metadata queue is processed even though we have\n        // no video/audio data.\n\n        this.processMetadataQueue_();\n      } // append is \"done\" instantly with no data.\n\n\n      this.checkAppendsDone_(segmentInfo);\n      return;\n    } // Since source updater could call back synchronously, do the increments first.\n\n\n    if (waitForVideo) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForAudio) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForVideo) {\n      this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n\n    if (waitForAudio) {\n      this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n  };\n\n  _proto.checkAppendsDone_ = function checkAppendsDone_(segmentInfo) {\n    if (this.checkForAbort_(segmentInfo.requestId)) {\n      return;\n    }\n\n    segmentInfo.waitingOnAppends--;\n\n    if (segmentInfo.waitingOnAppends === 0) {\n      this.handleAppendsDone_();\n    }\n  };\n\n  _proto.checkForIllegalMediaSwitch = function checkForIllegalMediaSwitch(trackInfo) {\n    var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.getCurrentMediaInfo_(), trackInfo);\n\n    if (illegalMediaSwitchError) {\n      this.error({\n        message: illegalMediaSwitchError,\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.updateSourceBufferTimestampOffset_ = function updateSourceBufferTimestampOffset_(segmentInfo) {\n    if (segmentInfo.timestampOffset === null || // we don't yet have the start for whatever media type (video or audio) has\n    // priority, timing-wise, so we must wait\n    typeof segmentInfo.timingInfo.start !== 'number' || // already updated the timestamp offset for this segment\n    segmentInfo.changedTimestampOffset || // the alt audio loader should not be responsible for setting the timestamp offset\n    this.loaderType_ !== 'main') {\n      return;\n    }\n\n    var didChange = false; // Primary timing goes by video, and audio is trimmed in the transmuxer, meaning that\n    // the timing info here comes from video. In the event that the audio is longer than\n    // the video, this will trim the start of the audio.\n    // This also trims any offset from 0 at the beginning of the media\n\n    segmentInfo.timestampOffset -= this.getSegmentStartTimeForTimestampOffsetCalculation_({\n      videoTimingInfo: segmentInfo.segment.videoTimingInfo,\n      audioTimingInfo: segmentInfo.segment.audioTimingInfo,\n      timingInfo: segmentInfo.timingInfo\n    }); // In the event that there are part segment downloads, each will try to update the\n    // timestamp offset. Retaining this bit of state prevents us from updating in the\n    // future (within the same segment), however, there may be a better way to handle it.\n\n    segmentInfo.changedTimestampOffset = true;\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      this.sourceUpdater_.videoTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      this.sourceUpdater_.audioTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (didChange) {\n      this.trigger('timestampoffset');\n    }\n  };\n\n  _proto.getSegmentStartTimeForTimestampOffsetCalculation_ = function getSegmentStartTimeForTimestampOffsetCalculation_(_ref10) {\n    var videoTimingInfo = _ref10.videoTimingInfo,\n        audioTimingInfo = _ref10.audioTimingInfo,\n        timingInfo = _ref10.timingInfo;\n\n    if (!this.useDtsForTimestampOffset_) {\n      return timingInfo.start;\n    }\n\n    if (videoTimingInfo && typeof videoTimingInfo.transmuxedDecodeStart === 'number') {\n      return videoTimingInfo.transmuxedDecodeStart;\n    } // handle audio only\n\n\n    if (audioTimingInfo && typeof audioTimingInfo.transmuxedDecodeStart === 'number') {\n      return audioTimingInfo.transmuxedDecodeStart;\n    } // handle content not transmuxed (e.g., MP4)\n\n\n    return timingInfo.start;\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_(segmentInfo) {\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n    var trackInfo = this.getMediaInfo_();\n    var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n    var prioritizedTimingInfo = useVideoTimingInfo && segmentInfo.videoTimingInfo ? segmentInfo.videoTimingInfo : segmentInfo.audioTimingInfo;\n\n    if (!prioritizedTimingInfo) {\n      return;\n    }\n\n    segmentInfo.timingInfo.end = typeof prioritizedTimingInfo.end === 'number' ? // End time may not exist in a case where we aren't parsing the full segment (one\n    // current example is the case of fmp4), so use the rough duration to calculate an\n    // end time.\n    prioritizedTimingInfo.end : prioritizedTimingInfo.start + segmentInfo.duration;\n  }\n  /**\n   * callback to run when appendBuffer is finished. detects if we are\n   * in a good state to do things with the data we got, or if we need\n   * to wait for more\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleAppendsDone_ = function handleAppendsDone_() {\n    // appendsdone can cause an abort\n    if (this.pendingSegment_) {\n      this.trigger('appendsdone');\n    }\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY'; // TODO should this move into this.checkForAbort to speed up requests post abort in\n      // all appending cases?\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Now that the end of the segment has been reached, we can set the end time. It's\n    // best to wait until all appends are done so we're sure that the primary media is\n    // finished (and we have its end time).\n\n    this.updateTimingInfoEnd_(segmentInfo);\n\n    if (this.shouldSaveSegmentTimingInfo_) {\n      // Timeline mappings should only be saved for the main loader. This is for multiple\n      // reasons:\n      //\n      // 1) Only one mapping is saved per timeline, meaning that if both the audio loader\n      //    and the main loader try to save the timeline mapping, whichever comes later\n      //    will overwrite the first. In theory this is OK, as the mappings should be the\n      //    same, however, it breaks for (2)\n      // 2) In the event of a live stream, the initial live point will make for a somewhat\n      //    arbitrary mapping. If audio and video streams are not perfectly in-sync, then\n      //    the mapping will be off for one of the streams, dependent on which one was\n      //    first saved (see (1)).\n      // 3) Primary timing goes by video in VHS, so the mapping should be video.\n      //\n      // Since the audio loader will wait for the main loader to load the first segment,\n      // the main loader will save the first timeline mapping, and ensure that there won't\n      // be a case where audio loads two segments without saving a mapping (thus leading\n      // to missing segment timing info).\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n    }\n\n    var segmentDurationMessage = getTroublesomeSegmentDurationMessage(segmentInfo, this.sourceType_);\n\n    if (segmentDurationMessage) {\n      if (segmentDurationMessage.severity === 'warn') {\n        videojs.log.warn(segmentDurationMessage.message);\n      } else {\n        this.logger_(segmentDurationMessage.message);\n      }\n    }\n\n    this.recordThroughput_(segmentInfo);\n    this.pendingSegment_ = null;\n    this.state = 'READY';\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate'); // if the sync request was not appended\n      // then it was not the correct segment.\n      // throw it away and use the data it gave us\n      // to get the correct one.\n\n      if (!segmentInfo.hasAppendedData_) {\n        this.logger_(\"Throwing away un-appended sync request \" + segmentInfoString(segmentInfo));\n        return;\n      }\n    }\n\n    this.logger_(\"Appended \" + segmentInfoString(segmentInfo));\n    this.addSegmentMetadataCue_(segmentInfo);\n    this.fetchAtBuffer_ = true;\n\n    if (this.currentTimeline_ !== segmentInfo.timeline) {\n      this.timelineChangeController_.lastTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      }); // If audio is not disabled, the main segment loader is responsible for updating\n      // the audio timeline as well. If the content is video only, this won't have any\n      // impact.\n\n      if (this.loaderType_ === 'main' && !this.audioDisabled_) {\n        this.timelineChangeController_.lastTimelineChange({\n          type: 'audio',\n          from: this.currentTimeline_,\n          to: segmentInfo.timeline\n        });\n      }\n    }\n\n    this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before\n    // the following conditional otherwise it may consider this a bad \"guess\"\n    // and attempt to resync when the post-update seekable window and live\n    // point would mean that this was the perfect segment to fetch\n\n    this.trigger('syncinfoupdate');\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var badSegmentGuess = segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3;\n    var badPartGuess = part && part.end && this.currentTime_() - part.end > segmentInfo.playlist.partTargetDuration * 3; // If we previously appended a segment/part that ends more than 3 part/targetDurations before\n    // the currentTime_ that means that our conservative guess was too conservative.\n    // In that case, reset the loader state so that we try to use any information gained\n    // from the previous request to create a new, more accurate, sync-point.\n\n    if (badSegmentGuess || badPartGuess) {\n      this.logger_(\"bad \" + (badSegmentGuess ? 'segment' : 'part') + \" \" + segmentInfoString(segmentInfo));\n      this.resetEverything();\n      return;\n    }\n\n    var isWalkingForward = this.mediaIndex !== null; // Don't do a rendition switch unless we have enough time to get a sync segment\n    // and conservatively guess\n\n    if (isWalkingForward) {\n      this.trigger('bandwidthupdate');\n    }\n\n    this.trigger('progress');\n    this.mediaIndex = segmentInfo.mediaIndex;\n    this.partIndex = segmentInfo.partIndex; // any time an update finishes and the last segment is in the\n    // buffer, end the stream. this ensures the \"ended\" event will\n    // fire if playback reaches that point.\n\n    if (this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex)) {\n      this.endOfStream();\n    } // used for testing\n\n\n    this.trigger('appended');\n\n    if (segmentInfo.hasAppendedData_) {\n      this.mediaAppends++;\n    }\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * Records the current throughput of the decrypt, transmux, and append\n   * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n   * moving average of the throughput. `throughput.count` is the number of\n   * data points in the average.\n   *\n   * @private\n   * @param {Object} segmentInfo the object returned by loadSegment\n   */\n  ;\n\n  _proto.recordThroughput_ = function recordThroughput_(segmentInfo) {\n    if (segmentInfo.duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's throughput because its duration of \" + segmentInfo.duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    var rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide\n    // by zero in the case where the throughput is ridiculously high\n\n    var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second\n\n    var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:\n    //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n\n    this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n  }\n  /**\n   * Adds a cue to the segment-metadata track with some metadata information about the\n   * segment\n   *\n   * @private\n   * @param {Object} segmentInfo\n   *        the object returned by loadSegment\n   * @method addSegmentMetadataCue_\n   */\n  ;\n\n  _proto.addSegmentMetadataCue_ = function addSegmentMetadataCue_(segmentInfo) {\n    if (!this.segmentMetadataTrack_) {\n      return;\n    }\n\n    var segment = segmentInfo.segment;\n    var start = segment.start;\n    var end = segment.end; // Do not try adding the cue if the start and end times are invalid.\n\n    if (!finite(start) || !finite(end)) {\n      return;\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n    var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n    var value = {\n      custom: segment.custom,\n      dateTimeObject: segment.dateTimeObject,\n      dateTimeString: segment.dateTimeString,\n      bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n      resolution: segmentInfo.playlist.attributes.RESOLUTION,\n      codecs: segmentInfo.playlist.attributes.CODECS,\n      byteLength: segmentInfo.byteLength,\n      uri: segmentInfo.uri,\n      timeline: segmentInfo.timeline,\n      playlist: segmentInfo.playlist.id,\n      start: start,\n      end: end\n    };\n    var data = JSON.stringify(value);\n    var cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between\n    // the differences of WebKitDataCue in safari and VTTCue in other browsers\n\n    cue.value = value;\n    this.segmentMetadataTrack_.addCue(cue);\n  };\n\n  return SegmentLoader;\n}(videojs.EventTarget);\n\nfunction noop() {}\n\nvar toTitleCase = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n\nvar bufferTypes = ['video', 'audio'];\n\nvar _updating = function updating(type, sourceUpdater) {\n  var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n  return sourceBuffer && sourceBuffer.updating || sourceUpdater.queuePending[type];\n};\n\nvar nextQueueIndexOfType = function nextQueueIndexOfType(type, queue) {\n  for (var i = 0; i < queue.length; i++) {\n    var queueEntry = queue[i];\n\n    if (queueEntry.type === 'mediaSource') {\n      // If the next entry is a media source entry (uses multiple source buffers), block\n      // processing to allow it to go through first.\n      return null;\n    }\n\n    if (queueEntry.type === type) {\n      return i;\n    }\n  }\n\n  return null;\n};\n\nvar shiftQueue = function shiftQueue(type, sourceUpdater) {\n  if (sourceUpdater.queue.length === 0) {\n    return;\n  }\n\n  var queueIndex = 0;\n  var queueEntry = sourceUpdater.queue[queueIndex];\n\n  if (queueEntry.type === 'mediaSource') {\n    if (!sourceUpdater.updating() && sourceUpdater.mediaSource.readyState !== 'closed') {\n      sourceUpdater.queue.shift();\n      queueEntry.action(sourceUpdater);\n\n      if (queueEntry.doneFn) {\n        queueEntry.doneFn();\n      } // Only specific source buffer actions must wait for async updateend events. Media\n      // Source actions process synchronously. Therefore, both audio and video source\n      // buffers are now clear to process the next queue entries.\n\n\n      shiftQueue('audio', sourceUpdater);\n      shiftQueue('video', sourceUpdater);\n    } // Media Source actions require both source buffers, so if the media source action\n    // couldn't process yet (because one or both source buffers are busy), block other\n    // queue actions until both are available and the media source action can process.\n\n\n    return;\n  }\n\n  if (type === 'mediaSource') {\n    // If the queue was shifted by a media source action (this happens when pushing a\n    // media source action onto the queue), then it wasn't from an updateend event from an\n    // audio or video source buffer, so there's no change from previous state, and no\n    // processing should be done.\n    return;\n  } // Media source queue entries don't need to consider whether the source updater is\n  // started (i.e., source buffers are created) as they don't need the source buffers, but\n  // source buffer queue entries do.\n\n\n  if (!sourceUpdater.ready() || sourceUpdater.mediaSource.readyState === 'closed' || _updating(type, sourceUpdater)) {\n    return;\n  }\n\n  if (queueEntry.type !== type) {\n    queueIndex = nextQueueIndexOfType(type, sourceUpdater.queue);\n\n    if (queueIndex === null) {\n      // Either there's no queue entry that uses this source buffer type in the queue, or\n      // there's a media source queue entry before the next entry of this type, in which\n      // case wait for that action to process first.\n      return;\n    }\n\n    queueEntry = sourceUpdater.queue[queueIndex];\n  }\n\n  sourceUpdater.queue.splice(queueIndex, 1); // Keep a record that this source buffer type is in use.\n  //\n  // The queue pending operation must be set before the action is performed in the event\n  // that the action results in a synchronous event that is acted upon. For instance, if\n  // an exception is thrown that can be handled, it's possible that new actions will be\n  // appended to an empty queue and immediately executed, but would not have the correct\n  // pending information if this property was set after the action was performed.\n\n  sourceUpdater.queuePending[type] = queueEntry;\n  queueEntry.action(type, sourceUpdater);\n\n  if (!queueEntry.doneFn) {\n    // synchronous operation, process next entry\n    sourceUpdater.queuePending[type] = null;\n    shiftQueue(type, sourceUpdater);\n    return;\n  }\n};\n\nvar cleanupBuffer = function cleanupBuffer(type, sourceUpdater) {\n  var buffer = sourceUpdater[type + \"Buffer\"];\n  var titleType = toTitleCase(type);\n\n  if (!buffer) {\n    return;\n  }\n\n  buffer.removeEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n  buffer.removeEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n  sourceUpdater.codecs[type] = null;\n  sourceUpdater[type + \"Buffer\"] = null;\n};\n\nvar inSourceBuffers = function inSourceBuffers(mediaSource, sourceBuffer) {\n  return mediaSource && sourceBuffer && Array.prototype.indexOf.call(mediaSource.sourceBuffers, sourceBuffer) !== -1;\n};\n\nvar actions = {\n  appendBuffer: function appendBuffer(bytes, segmentInfo, onError) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Appending segment \" + segmentInfo.mediaIndex + \"'s \" + bytes.length + \" bytes to \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.appendBuffer(bytes);\n      } catch (e) {\n        sourceUpdater.logger_(\"Error with code \" + e.code + \" \" + (e.code === QUOTA_EXCEEDED_ERR ? '(QUOTA_EXCEEDED_ERR) ' : '') + (\"when appending segment \" + segmentInfo.mediaIndex + \" to \" + type + \"Buffer\"));\n        sourceUpdater.queuePending[type] = null;\n        onError(e);\n      }\n    };\n  },\n  remove: function remove(start, end) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + start + \" to \" + end + \" from \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.remove(start, end);\n      } catch (e) {\n        sourceUpdater.logger_(\"Remove \" + start + \" to \" + end + \" from \" + type + \"Buffer failed\");\n      }\n    };\n  },\n  timestampOffset: function timestampOffset(offset) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Setting \" + type + \"timestampOffset to \" + offset);\n      sourceBuffer.timestampOffset = offset;\n    };\n  },\n  callback: function callback(_callback) {\n    return function (type, sourceUpdater) {\n      _callback();\n    };\n  },\n  endOfStream: function endOfStream(error) {\n    return function (sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Calling mediaSource endOfStream(\" + (error || '') + \")\");\n\n      try {\n        sourceUpdater.mediaSource.endOfStream(error);\n      } catch (e) {\n        videojs.log.warn('Failed to call media source endOfStream', e);\n      }\n    };\n  },\n  duration: function duration(_duration) {\n    return function (sourceUpdater) {\n      sourceUpdater.logger_(\"Setting mediaSource duration to \" + _duration);\n\n      try {\n        sourceUpdater.mediaSource.duration = _duration;\n      } catch (e) {\n        videojs.log.warn('Failed to set media source duration', e);\n      }\n    };\n  },\n  abort: function abort() {\n    return function (type, sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"calling abort on \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.abort();\n      } catch (e) {\n        videojs.log.warn(\"Failed to abort on \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  addSourceBuffer: function addSourceBuffer(type, codec) {\n    return function (sourceUpdater) {\n      var titleType = toTitleCase(type);\n      var mime = getMimeForCodec(codec);\n      sourceUpdater.logger_(\"Adding \" + type + \"Buffer with codec \" + codec + \" to mediaSource\");\n      var sourceBuffer = sourceUpdater.mediaSource.addSourceBuffer(mime);\n      sourceBuffer.addEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n      sourceBuffer.addEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n      sourceUpdater.codecs[type] = codec;\n      sourceUpdater[type + \"Buffer\"] = sourceBuffer;\n    };\n  },\n  removeSourceBuffer: function removeSourceBuffer(type) {\n    return function (sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      cleanupBuffer(type, sourceUpdater); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + type + \"Buffer with codec \" + sourceUpdater.codecs[type] + \" from mediaSource\");\n\n      try {\n        sourceUpdater.mediaSource.removeSourceBuffer(sourceBuffer);\n      } catch (e) {\n        videojs.log.warn(\"Failed to removeSourceBuffer \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  changeType: function changeType(codec) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      var mime = getMimeForCodec(codec); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      } // do not update codec if we don't need to.\n\n\n      if (sourceUpdater.codecs[type] === codec) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"changing \" + type + \"Buffer codec from \" + sourceUpdater.codecs[type] + \" to \" + codec);\n      sourceBuffer.changeType(mime);\n      sourceUpdater.codecs[type] = codec;\n    };\n  }\n};\n\nvar pushQueue = function pushQueue(_ref) {\n  var type = _ref.type,\n      sourceUpdater = _ref.sourceUpdater,\n      action = _ref.action,\n      doneFn = _ref.doneFn,\n      name = _ref.name;\n  sourceUpdater.queue.push({\n    type: type,\n    action: action,\n    doneFn: doneFn,\n    name: name\n  });\n  shiftQueue(type, sourceUpdater);\n};\n\nvar onUpdateend = function onUpdateend(type, sourceUpdater) {\n  return function (e) {\n    // Although there should, in theory, be a pending action for any updateend receieved,\n    // there are some actions that may trigger updateend events without set definitions in\n    // the w3c spec. For instance, setting the duration on the media source may trigger\n    // updateend events on source buffers. This does not appear to be in the spec. As such,\n    // if we encounter an updateend without a corresponding pending action from our queue\n    // for that source buffer type, process the next action.\n    if (sourceUpdater.queuePending[type]) {\n      var doneFn = sourceUpdater.queuePending[type].doneFn;\n      sourceUpdater.queuePending[type] = null;\n\n      if (doneFn) {\n        // if there's an error, report it\n        doneFn(sourceUpdater[type + \"Error_\"]);\n      }\n    }\n\n    shiftQueue(type, sourceUpdater);\n  };\n};\n/**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the SourceBuffer from\n * @param {string} mimeType the desired MIME type of the underlying SourceBuffer\n */\n\n\nvar SourceUpdater = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SourceUpdater, _videojs$EventTarget);\n\n  function SourceUpdater(mediaSource) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.mediaSource = mediaSource;\n\n    _this.sourceopenListener_ = function () {\n      return shiftQueue('mediaSource', _assertThisInitialized(_this));\n    };\n\n    _this.mediaSource.addEventListener('sourceopen', _this.sourceopenListener_);\n\n    _this.logger_ = logger('SourceUpdater'); // initial timestamp offset is 0\n\n    _this.audioTimestampOffset_ = 0;\n    _this.videoTimestampOffset_ = 0;\n    _this.queue = [];\n    _this.queuePending = {\n      audio: null,\n      video: null\n    };\n    _this.delayedAudioAppendQueue_ = [];\n    _this.videoAppendQueued_ = false;\n    _this.codecs = {};\n    _this.onVideoUpdateEnd_ = onUpdateend('video', _assertThisInitialized(_this));\n    _this.onAudioUpdateEnd_ = onUpdateend('audio', _assertThisInitialized(_this));\n\n    _this.onVideoError_ = function (e) {\n      // used for debugging\n      _this.videoError_ = e;\n    };\n\n    _this.onAudioError_ = function (e) {\n      // used for debugging\n      _this.audioError_ = e;\n    };\n\n    _this.createdSourceBuffers_ = false;\n    _this.initializedEme_ = false;\n    _this.triggeredReady_ = false;\n    return _this;\n  }\n\n  var _proto = SourceUpdater.prototype;\n\n  _proto.initializedEme = function initializedEme() {\n    this.initializedEme_ = true;\n    this.triggerReady();\n  };\n\n  _proto.hasCreatedSourceBuffers = function hasCreatedSourceBuffers() {\n    // if false, likely waiting on one of the segment loaders to get enough data to create\n    // source buffers\n    return this.createdSourceBuffers_;\n  };\n\n  _proto.hasInitializedAnyEme = function hasInitializedAnyEme() {\n    return this.initializedEme_;\n  };\n\n  _proto.ready = function ready() {\n    return this.hasCreatedSourceBuffers() && this.hasInitializedAnyEme();\n  };\n\n  _proto.createSourceBuffers = function createSourceBuffers(codecs) {\n    if (this.hasCreatedSourceBuffers()) {\n      // already created them before\n      return;\n    } // the intial addOrChangeSourceBuffers will always be\n    // two add buffers.\n\n\n    this.addOrChangeSourceBuffers(codecs);\n    this.createdSourceBuffers_ = true;\n    this.trigger('createdsourcebuffers');\n    this.triggerReady();\n  };\n\n  _proto.triggerReady = function triggerReady() {\n    // only allow ready to be triggered once, this prevents the case\n    // where:\n    // 1. we trigger createdsourcebuffers\n    // 2. ie 11 synchronously initializates eme\n    // 3. the synchronous initialization causes us to trigger ready\n    // 4. We go back to the ready check in createSourceBuffers and ready is triggered again.\n    if (this.ready() && !this.triggeredReady_) {\n      this.triggeredReady_ = true;\n      this.trigger('ready');\n    }\n  }\n  /**\n   * Add a type of source buffer to the media source.\n   *\n   * @param {string} type\n   *        The type of source buffer to add.\n   *\n   * @param {string} codec\n   *        The codec to add the source buffer with.\n   */\n  ;\n\n  _proto.addSourceBuffer = function addSourceBuffer(type, codec) {\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.addSourceBuffer(type, codec),\n      name: 'addSourceBuffer'\n    });\n  }\n  /**\n   * call abort on a source buffer.\n   *\n   * @param {string} type\n   *        The type of source buffer to call abort on.\n   */\n  ;\n\n  _proto.abort = function abort(type) {\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.abort(type),\n      name: 'abort'\n    });\n  }\n  /**\n   * Call removeSourceBuffer and remove a specific type\n   * of source buffer on the mediaSource.\n   *\n   * @param {string} type\n   *        The type of source buffer to remove.\n   */\n  ;\n\n  _proto.removeSourceBuffer = function removeSourceBuffer(type) {\n    if (!this.canRemoveSourceBuffer()) {\n      videojs.log.error('removeSourceBuffer is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.removeSourceBuffer(type),\n      name: 'removeSourceBuffer'\n    });\n  }\n  /**\n   * Whether or not the removeSourceBuffer function is supported\n   * on the mediaSource.\n   *\n   * @return {boolean}\n   *          if removeSourceBuffer can be called.\n   */\n  ;\n\n  _proto.canRemoveSourceBuffer = function canRemoveSourceBuffer() {\n    // IE reports that it supports removeSourceBuffer, but often throws\n    // errors when attempting to use the function. So we report that it\n    // does not support removeSourceBuffer. As of Firefox 83 removeSourceBuffer\n    // throws errors, so we report that it does not support this as well.\n    return !videojs.browser.IE_VERSION && !videojs.browser.IS_FIREFOX && window$1.MediaSource && window$1.MediaSource.prototype && typeof window$1.MediaSource.prototype.removeSourceBuffer === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  SourceUpdater.canChangeType = function canChangeType() {\n    return window$1.SourceBuffer && window$1.SourceBuffer.prototype && typeof window$1.SourceBuffer.prototype.changeType === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  _proto.canChangeType = function canChangeType() {\n    return this.constructor.canChangeType();\n  }\n  /**\n   * Call the changeType function on a source buffer, given the code and type.\n   *\n   * @param {string} type\n   *        The type of source buffer to call changeType on.\n   *\n   * @param {string} codec\n   *        The codec string to change type with on the source buffer.\n   */\n  ;\n\n  _proto.changeType = function changeType(type, codec) {\n    if (!this.canChangeType()) {\n      videojs.log.error('changeType is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.changeType(codec),\n      name: 'changeType'\n    });\n  }\n  /**\n   * Add source buffers with a codec or, if they are already created,\n   * call changeType on source buffers using changeType.\n   *\n   * @param {Object} codecs\n   *        Codecs to switch to\n   */\n  ;\n\n  _proto.addOrChangeSourceBuffers = function addOrChangeSourceBuffers(codecs) {\n    var _this2 = this;\n\n    if (!codecs || typeof codecs !== 'object' || Object.keys(codecs).length === 0) {\n      throw new Error('Cannot addOrChangeSourceBuffers to undefined codecs');\n    }\n\n    Object.keys(codecs).forEach(function (type) {\n      var codec = codecs[type];\n\n      if (!_this2.hasCreatedSourceBuffers()) {\n        return _this2.addSourceBuffer(type, codec);\n      }\n\n      if (_this2.canChangeType()) {\n        _this2.changeType(type, codec);\n      }\n    });\n  }\n  /**\n   * Queue an update to append an ArrayBuffer.\n   *\n   * @param {MediaObject} object containing audioBytes and/or videoBytes\n   * @param {Function} done the function to call when done\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n   */\n  ;\n\n  _proto.appendBuffer = function appendBuffer(options, doneFn) {\n    var _this3 = this;\n\n    var segmentInfo = options.segmentInfo,\n        type = options.type,\n        bytes = options.bytes;\n    this.processedAppend_ = true;\n\n    if (type === 'audio' && this.videoBuffer && !this.videoAppendQueued_) {\n      this.delayedAudioAppendQueue_.push([options, doneFn]);\n      this.logger_(\"delayed audio append of \" + bytes.length + \" until video append\");\n      return;\n    } // In the case of certain errors, for instance, QUOTA_EXCEEDED_ERR, updateend will\n    // not be fired. This means that the queue will be blocked until the next action\n    // taken by the segment-loader. Provide a mechanism for segment-loader to handle\n    // these errors by calling the doneFn with the specific error.\n\n\n    var onError = doneFn;\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.appendBuffer(bytes, segmentInfo || {\n        mediaIndex: -1\n      }, onError),\n      doneFn: doneFn,\n      name: 'appendBuffer'\n    });\n\n    if (type === 'video') {\n      this.videoAppendQueued_ = true;\n\n      if (!this.delayedAudioAppendQueue_.length) {\n        return;\n      }\n\n      var queue = this.delayedAudioAppendQueue_.slice();\n      this.logger_(\"queuing delayed audio \" + queue.length + \" appendBuffers\");\n      this.delayedAudioAppendQueue_.length = 0;\n      queue.forEach(function (que) {\n        _this3.appendBuffer.apply(_this3, que);\n      });\n    }\n  }\n  /**\n   * Get the audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The audio buffer's buffered time range\n   */\n  ;\n\n  _proto.audioBuffered = function audioBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.audioBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.audioBuffer.buffered ? this.audioBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get the video buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The video buffer's buffered time range\n   */\n  ;\n\n  _proto.videoBuffered = function videoBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.videoBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.videoBuffer.buffered ? this.videoBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get a combined video/audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         the combined time range\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var video = inSourceBuffers(this.mediaSource, this.videoBuffer) ? this.videoBuffer : null;\n    var audio = inSourceBuffers(this.mediaSource, this.audioBuffer) ? this.audioBuffer : null;\n\n    if (audio && !video) {\n      return this.audioBuffered();\n    }\n\n    if (video && !audio) {\n      return this.videoBuffered();\n    }\n\n    return bufferIntersection(this.audioBuffered(), this.videoBuffered());\n  }\n  /**\n   * Add a callback to the queue that will set duration on the mediaSource.\n   *\n   * @param {number} duration\n   *        The duration to set\n   *\n   * @param {Function} [doneFn]\n   *        function to run after duration has been set.\n   */\n  ;\n\n  _proto.setDuration = function setDuration(duration, doneFn) {\n    if (doneFn === void 0) {\n      doneFn = noop;\n    }\n\n    // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.duration(duration),\n      name: 'duration',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Add a mediaSource endOfStream call to the queue\n   *\n   * @param {Error} [error]\n   *        Call endOfStream with an error\n   *\n   * @param {Function} [doneFn]\n   *        A function that should be called when the\n   *        endOfStream call has finished.\n   */\n  ;\n\n  _proto.endOfStream = function endOfStream(error, doneFn) {\n    if (error === void 0) {\n      error = null;\n    }\n\n    if (doneFn === void 0) {\n      doneFn = noop;\n    }\n\n    if (typeof error !== 'string') {\n      error = undefined;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.endOfStream(error),\n      name: 'endOfStream',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeAudio = function removeAudio(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.audioBuffered().length || this.audioBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeVideo = function removeVideo(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.videoBuffered().length || this.videoBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Whether the underlying sourceBuffer is updating or not\n   *\n   * @return {boolean} the updating status of the SourceBuffer\n   */\n  ;\n\n  _proto.updating = function updating() {\n    // the audio/video source buffer is updating\n    if (_updating('audio', this) || _updating('video', this)) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Set/get the timestampoffset on the audio SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.audioTimestampOffset = function audioTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.audioBuffer && // no point in updating if it's the same\n    this.audioTimestampOffset_ !== offset) {\n      pushQueue({\n        type: 'audio',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.audioTimestampOffset_ = offset;\n    }\n\n    return this.audioTimestampOffset_;\n  }\n  /**\n   * Set/get the timestampoffset on the video SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.videoTimestampOffset = function videoTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.videoBuffer && // no point in updating if it's the same\n    this.videoTimestampOffset !== offset) {\n      pushQueue({\n        type: 'video',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.videoTimestampOffset_ = offset;\n    }\n\n    return this.videoTimestampOffset_;\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the audio queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.audioQueueCallback = function audioQueueCallback(callback) {\n    if (!this.audioBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the video queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.videoQueueCallback = function videoQueueCallback(callback) {\n    if (!this.videoBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * dispose of the source updater and the underlying sourceBuffer\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this4 = this;\n\n    this.trigger('dispose');\n    bufferTypes.forEach(function (type) {\n      _this4.abort(type);\n\n      if (_this4.canRemoveSourceBuffer()) {\n        _this4.removeSourceBuffer(type);\n      } else {\n        _this4[type + \"QueueCallback\"](function () {\n          return cleanupBuffer(type, _this4);\n        });\n      }\n    });\n    this.videoAppendQueued_ = false;\n    this.delayedAudioAppendQueue_.length = 0;\n\n    if (this.sourceopenListener_) {\n      this.mediaSource.removeEventListener('sourceopen', this.sourceopenListener_);\n    }\n\n    this.off();\n  };\n\n  return SourceUpdater;\n}(videojs.EventTarget);\n\nvar uint8ToUtf8 = function uint8ToUtf8(uintArray) {\n  return decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));\n};\n\nvar VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(function (char) {\n  return char.charCodeAt(0);\n}));\n\nvar NoVttJsError = /*#__PURE__*/function (_Error) {\n  _inheritsLoose(NoVttJsError, _Error);\n\n  function NoVttJsError() {\n    return _Error.call(this, 'Trying to parse received VTT cues, but there is no WebVTT. Make sure vtt.js is loaded.') || this;\n  }\n\n  return NoVttJsError;\n}( /*#__PURE__*/_wrapNativeSuper(Error));\n/**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar VTTSegmentLoader = /*#__PURE__*/function (_SegmentLoader) {\n  _inheritsLoose(VTTSegmentLoader, _SegmentLoader);\n\n  function VTTSegmentLoader(settings, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _SegmentLoader.call(this, settings, options) || this; // SegmentLoader requires a MediaSource be specified or it will throw an error;\n    // however, VTTSegmentLoader has no need of a media source, so delete the reference\n\n    _this.mediaSource_ = null;\n    _this.subtitlesTrack_ = null;\n    _this.loaderType_ = 'subtitle';\n    _this.featuresNativeTextTracks_ = settings.featuresNativeTextTracks;\n    _this.loadVttJs = settings.loadVttJs; // The VTT segment will have its own time mappings. Saving VTT segment timing info in\n    // the sync controller leads to improper behavior.\n\n    _this.shouldSaveSegmentTimingInfo_ = false;\n    return _this;\n  }\n\n  var _proto = VTTSegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    // don't need to transmux any subtitles\n    return null;\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {\n      return videojs.createTimeRanges();\n    }\n\n    var cues = this.subtitlesTrack_.cues;\n    var start = cues[0].startTime;\n    var end = cues[cues.length - 1].startTime;\n    return videojs.createTimeRanges([[start, end]]);\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      // append WebVTT line terminators to the media initialization segment if it exists\n      // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n      // requires two or more WebVTT line terminators between the WebVTT header and the\n      // rest of the file\n      var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n      var combinedSegment = new Uint8Array(combinedByteLength);\n      combinedSegment.set(map.bytes);\n      combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: combinedSegment\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY';\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * Set a subtitle track on the segment loader to add subtitles to\n   *\n   * @param {TextTrack=} track\n   *        The text track to add loaded subtitles to\n   * @return {TextTrack}\n   *        Returns the subtitles track\n   */\n  ;\n\n  _proto.track = function track(_track) {\n    if (typeof _track === 'undefined') {\n      return this.subtitlesTrack_;\n    }\n\n    this.subtitlesTrack_ = _track; // if we were unpaused but waiting for a sourceUpdater, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      this.init_();\n    }\n\n    return this.subtitlesTrack_;\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   */\n  ;\n\n  _proto.remove = function remove(start, end) {\n    removeCuesFromTrack(start, end, this.subtitlesTrack_);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    var _this2 = this;\n\n    // see if we need to begin loading immediately\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n      // We don't have the timestamp offset that we need to sync subtitles.\n      // Rerun on a timestamp offset or user interaction.\n      var checkTimestampOffset = function checkTimestampOffset() {\n        _this2.state = 'READY';\n\n        if (!_this2.paused()) {\n          // if not paused, queue a buffer check as soon as possible\n          _this2.monitorBuffer_();\n        }\n      };\n\n      this.syncController_.one('timestampoffset', checkTimestampOffset);\n      this.state = 'WAITING_ON_TIMELINE';\n      return;\n    }\n\n    this.loadSegment_(segmentInfo);\n  } // never set a timestamp offset for vtt segments.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_() {\n    return null;\n  };\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    return this.skipEmptySegments_(_SegmentLoader.prototype.chooseNextRequest_.call(this));\n  }\n  /**\n   * Prevents the segment loader from requesting segments we know contain no subtitles\n   * by walking forward until we find the next segment that we don't know whether it is\n   * empty or not.\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @return {Object}\n   *         a segment info object that describes the current segment\n   */\n  ;\n\n  _proto.skipEmptySegments_ = function skipEmptySegments_(segmentInfo) {\n    while (segmentInfo && segmentInfo.segment.empty) {\n      // stop at the last possible segmentInfo\n      if (segmentInfo.mediaIndex + 1 >= segmentInfo.playlist.segments.length) {\n        segmentInfo = null;\n        break;\n      }\n\n      segmentInfo = this.generateSegmentInfo_({\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex + 1,\n        startOfSegment: segmentInfo.startOfSegment + segmentInfo.duration,\n        isSyncRequest: segmentInfo.isSyncRequest\n      });\n    }\n\n    return segmentInfo;\n  };\n\n  _proto.stopForError = function stopForError(error) {\n    this.error(error);\n    this.state = 'READY';\n    this.pause();\n    this.trigger('error');\n  }\n  /**\n   * append a decrypted segement to the SourceBuffer through a SourceUpdater\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    var _this3 = this;\n\n    if (!this.subtitlesTrack_) {\n      this.state = 'READY';\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // the request was aborted\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY';\n      this.mediaRequestsAborted += 1;\n      return;\n    }\n\n    if (error) {\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n      }\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        this.mediaRequestsAborted += 1;\n      } else {\n        this.mediaRequestsErrored += 1;\n      }\n\n      this.stopForError(error);\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functionality between segment loaders\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats); // if this request included a segment key, save that data in the cache\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    this.state = 'APPENDING'; // used for tests\n\n    this.trigger('appending');\n    var segment = segmentInfo.segment;\n\n    if (segment.map) {\n      segment.map.bytes = simpleSegment.map.bytes;\n    }\n\n    segmentInfo.bytes = simpleSegment.bytes; // Make sure that vttjs has loaded, otherwise, load it and wait till it finished loading\n\n    if (typeof window$1.WebVTT !== 'function' && typeof this.loadVttJs === 'function') {\n      this.state = 'WAITING_ON_VTTJS'; // should be fine to call multiple times\n      // script will be loaded once but multiple listeners will be added to the queue, which is expected.\n\n      this.loadVttJs().then(function () {\n        return _this3.segmentRequestFinished_(error, simpleSegment, result);\n      }, function () {\n        return _this3.stopForError({\n          message: 'Error loading vtt.js'\n        });\n      });\n      return;\n    }\n\n    segment.requested = true;\n\n    try {\n      this.parseVTTCues_(segmentInfo);\n    } catch (e) {\n      this.stopForError({\n        message: e.message\n      });\n      return;\n    }\n\n    this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n\n    if (segmentInfo.cues.length) {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.cues[0].startTime,\n        end: segmentInfo.cues[segmentInfo.cues.length - 1].endTime\n      };\n    } else {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.startOfSegment,\n        end: segmentInfo.startOfSegment + segmentInfo.duration\n      };\n    }\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate');\n      this.pendingSegment_ = null;\n      this.state = 'READY';\n      return;\n    }\n\n    segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n    this.mediaSecondsLoaded += segment.duration; // Create VTTCue instances for each cue in the new segment and add them to\n    // the subtitle track\n\n    segmentInfo.cues.forEach(function (cue) {\n      _this3.subtitlesTrack_.addCue(_this3.featuresNativeTextTracks_ ? new window$1.VTTCue(cue.startTime, cue.endTime, cue.text) : cue);\n    }); // Remove any duplicate cues from the subtitle track. The WebVTT spec allows\n    // cues to have identical time-intervals, but if the text is also identical\n    // we can safely assume it is a duplicate that can be removed (ex. when a cue\n    // \"overlaps\" VTT segments)\n\n    removeDuplicateCuesFromTrack(this.subtitlesTrack_);\n    this.handleAppendsDone_();\n  };\n\n  _proto.handleData_ = function handleData_() {// noop as we shouldn't be getting video/audio data captions\n    // that we do not support here.\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_() {// noop\n  }\n  /**\n   * Uses the WebVTT parser to parse the segment response\n   *\n   * @throws NoVttJsError\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @private\n   */\n  ;\n\n  _proto.parseVTTCues_ = function parseVTTCues_(segmentInfo) {\n    var decoder;\n    var decodeBytesToString = false;\n\n    if (typeof window$1.WebVTT !== 'function') {\n      // caller is responsible for exception handling.\n      throw new NoVttJsError();\n    }\n\n    if (typeof window$1.TextDecoder === 'function') {\n      decoder = new window$1.TextDecoder('utf8');\n    } else {\n      decoder = window$1.WebVTT.StringDecoder();\n      decodeBytesToString = true;\n    }\n\n    var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, decoder);\n    segmentInfo.cues = [];\n    segmentInfo.timestampmap = {\n      MPEGTS: 0,\n      LOCAL: 0\n    };\n    parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n\n    parser.ontimestampmap = function (map) {\n      segmentInfo.timestampmap = map;\n    };\n\n    parser.onparsingerror = function (error) {\n      videojs.log.warn('Error encountered when parsing cues: ' + error.message);\n    };\n\n    if (segmentInfo.segment.map) {\n      var mapData = segmentInfo.segment.map.bytes;\n\n      if (decodeBytesToString) {\n        mapData = uint8ToUtf8(mapData);\n      }\n\n      parser.parse(mapData);\n    }\n\n    var segmentData = segmentInfo.bytes;\n\n    if (decodeBytesToString) {\n      segmentData = uint8ToUtf8(segmentData);\n    }\n\n    parser.parse(segmentData);\n    parser.flush();\n  }\n  /**\n   * Updates the start and end times of any cues parsed by the WebVTT parser using\n   * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n   * from the SyncController\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @param {Object} mappingObj\n   *        object containing a mapping from TS to media time\n   * @param {Object} playlist\n   *        the playlist object containing the segment\n   * @private\n   */\n  ;\n\n  _proto.updateTimeMapping_ = function updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n    var segment = segmentInfo.segment;\n\n    if (!mappingObj) {\n      // If the sync controller does not have a mapping of TS to Media Time for the\n      // timeline, then we don't have enough information to update the cue\n      // start/end times\n      return;\n    }\n\n    if (!segmentInfo.cues.length) {\n      // If there are no cues, we also do not have enough information to figure out\n      // segment timing. Mark that the segment contains no cues so we don't re-request\n      // an empty segment.\n      segment.empty = true;\n      return;\n    }\n\n    var timestampmap = segmentInfo.timestampmap;\n    var diff = timestampmap.MPEGTS / ONE_SECOND_IN_TS - timestampmap.LOCAL + mappingObj.mapping;\n    segmentInfo.cues.forEach(function (cue) {\n      // First convert cue time to TS time using the timestamp-map provided within the vtt\n      cue.startTime += diff;\n      cue.endTime += diff;\n    });\n\n    if (!playlist.syncInfo) {\n      var firstStart = segmentInfo.cues[0].startTime;\n      var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n      playlist.syncInfo = {\n        mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n        time: Math.min(firstStart, lastStart - segment.duration)\n      };\n    }\n  };\n\n  return VTTSegmentLoader;\n}(SegmentLoader);\n\n/**\n * @file ad-cue-tags.js\n */\n/**\n * Searches for an ad cue that overlaps with the given mediaTime\n *\n * @param {Object} track\n *        the track to find the cue for\n *\n * @param {number} mediaTime\n *        the time to find the cue at\n *\n * @return {Object|null}\n *         the found cue or null\n */\n\nvar findAdCue = function findAdCue(track, mediaTime) {\n  var cues = track.cues;\n\n  for (var i = 0; i < cues.length; i++) {\n    var cue = cues[i];\n\n    if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n      return cue;\n    }\n  }\n\n  return null;\n};\nvar updateAdCues = function updateAdCues(media, track, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  if (!media.segments) {\n    return;\n  }\n\n  var mediaTime = offset;\n  var cue;\n\n  for (var i = 0; i < media.segments.length; i++) {\n    var segment = media.segments[i];\n\n    if (!cue) {\n      // Since the cues will span for at least the segment duration, adding a fudge\n      // factor of half segment duration will prevent duplicate cues from being\n      // created when timing info is not exact (e.g. cue start time initialized\n      // at 10.006677, but next call mediaTime is 10.003332 )\n      cue = findAdCue(track, mediaTime + segment.duration / 2);\n    }\n\n    if (cue) {\n      if ('cueIn' in segment) {\n        // Found a CUE-IN so end the cue\n        cue.endTime = mediaTime;\n        cue.adEndTime = mediaTime;\n        mediaTime += segment.duration;\n        cue = null;\n        continue;\n      }\n\n      if (mediaTime < cue.endTime) {\n        // Already processed this mediaTime for this cue\n        mediaTime += segment.duration;\n        continue;\n      } // otherwise extend cue until a CUE-IN is found\n\n\n      cue.endTime += segment.duration;\n    } else {\n      if ('cueOut' in segment) {\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n        cue.adStartTime = mediaTime; // Assumes tag format to be\n        // #EXT-X-CUE-OUT:30\n\n        cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n        track.addCue(cue);\n      }\n\n      if ('cueOutCont' in segment) {\n        // Entered into the middle of an ad cue\n        // Assumes tag formate to be\n        // #EXT-X-CUE-OUT-CONT:10/30\n        var _segment$cueOutCont$s = segment.cueOutCont.split('/').map(parseFloat),\n            adOffset = _segment$cueOutCont$s[0],\n            adTotal = _segment$cueOutCont$s[1];\n\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, '');\n        cue.adStartTime = mediaTime - adOffset;\n        cue.adEndTime = cue.adStartTime + adTotal;\n        track.addCue(cue);\n      }\n    }\n\n    mediaTime += segment.duration;\n  }\n};\n\n// synchronize expired playlist segments.\n// the max media sequence diff is 48 hours of live stream\n// content with two second segments. Anything larger than that\n// will likely be invalid.\n\nvar MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC = 86400;\nvar syncPointStrategies = [// Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n//                the equivalence display-time 0 === segment-index 0\n{\n  name: 'VOD',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (duration !== Infinity) {\n      var syncPoint = {\n        time: 0,\n        segmentIndex: 0,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}, // Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n{\n  name: 'ProgramDateTime',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (!Object.keys(syncController.timelineToDatetimeMappings).length) {\n      return null;\n    }\n\n    var syncPoint = null;\n    var lastDistance = null;\n    var partsAndSegments = getPartsAndSegments(playlist);\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var datetimeMapping = syncController.timelineToDatetimeMappings[segment.timeline];\n\n      if (!datetimeMapping || !segment.dateTimeObject) {\n        continue;\n      }\n\n      var segmentTime = segment.dateTimeObject.getTime() / 1000;\n      var start = segmentTime + datetimeMapping; // take part duration into account.\n\n      if (segment.parts && typeof partAndSegment.partIndex === 'number') {\n        for (var z = 0; z < partAndSegment.partIndex; z++) {\n          start += segment.parts[z].duration;\n        }\n      }\n\n      var distance = Math.abs(currentTime - start); // Once the distance begins to increase, or if distance is 0, we have passed\n      // currentTime and can stop looking for better candidates\n\n      if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {\n        break;\n      }\n\n      lastDistance = distance;\n      syncPoint = {\n        time: start,\n        segmentIndex: partAndSegment.segmentIndex,\n        partIndex: partAndSegment.partIndex\n      };\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Segment\": We have a known time mapping for a timeline and a\n//                    segment in the current timeline with timing data\n{\n  name: 'Segment',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    var lastDistance = null;\n    currentTime = currentTime || 0;\n    var partsAndSegments = getPartsAndSegments(playlist);\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var start = partAndSegment.part && partAndSegment.part.start || segment && segment.start;\n\n      if (segment.timeline === currentTimeline && typeof start !== 'undefined') {\n        var distance = Math.abs(currentTime - start); // Once the distance begins to increase, we have passed\n        // currentTime and can stop looking for better candidates\n\n        if (lastDistance !== null && lastDistance < distance) {\n          break;\n        }\n\n        if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n          lastDistance = distance;\n          syncPoint = {\n            time: start,\n            segmentIndex: partAndSegment.segmentIndex,\n            partIndex: partAndSegment.partIndex\n          };\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Discontinuity\": We have a discontinuity with a known\n//                          display-time\n{\n  name: 'Discontinuity',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    currentTime = currentTime || 0;\n\n    if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      var lastDistance = null;\n\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var discontinuitySync = syncController.discontinuities[discontinuity];\n\n        if (discontinuitySync) {\n          var distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed\n          // currentTime and can stop looking for better candidates\n\n          if (lastDistance !== null && lastDistance < distance) {\n            break;\n          }\n\n          if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n            lastDistance = distance;\n            syncPoint = {\n              time: discontinuitySync.time,\n              segmentIndex: segmentIndex,\n              partIndex: null\n            };\n          }\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Playlist\": We have a playlist with a known mapping of\n//                     segment index to display time\n{\n  name: 'Playlist',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (playlist.syncInfo) {\n      var syncPoint = {\n        time: playlist.syncInfo.time,\n        segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}];\n\nvar SyncController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SyncController, _videojs$EventTarget);\n\n  function SyncController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // ...for synching across variants\n\n    _this.timelines = [];\n    _this.discontinuities = [];\n    _this.timelineToDatetimeMappings = {};\n    _this.logger_ = logger('SyncController');\n    return _this;\n  }\n  /**\n   * Find a sync-point for the playlist specified\n   *\n   * A sync-point is defined as a known mapping from display-time to\n   * a segment-index in the current playlist.\n   *\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinite if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Object}\n   *          A sync-point object\n   */\n\n\n  var _proto = SyncController.prototype;\n\n  _proto.getSyncPoint = function getSyncPoint(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime);\n\n    if (!syncPoints.length) {\n      // Signal that we need to attempt to get a sync-point manually\n      // by fetching a segment in the playlist and constructing\n      // a sync-point from that information\n      return null;\n    } // Now find the sync-point that is closest to the currentTime because\n    // that should result in the most accurate guess about which segment\n    // to fetch\n\n\n    return this.selectSyncPoint_(syncPoints, {\n      key: 'time',\n      value: currentTime\n    });\n  }\n  /**\n   * Calculate the amount of time that has expired off the playlist during playback\n   *\n   * @param {Playlist} playlist\n   *        Playlist object to calculate expired from\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playling a live source)\n   * @return {number|null}\n   *          The amount of time that has expired off the playlist during playback. Null\n   *          if no sync-points for the playlist can be found.\n   */\n  ;\n\n  _proto.getExpiredTime = function getExpiredTime(playlist, duration) {\n    if (!playlist || !playlist.segments) {\n      return null;\n    }\n\n    var syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time\n\n    if (!syncPoints.length) {\n      return null;\n    }\n\n    var syncPoint = this.selectSyncPoint_(syncPoints, {\n      key: 'segmentIndex',\n      value: 0\n    }); // If the sync-point is beyond the start of the playlist, we want to subtract the\n    // duration from index 0 to syncPoint.segmentIndex instead of adding.\n\n    if (syncPoint.segmentIndex > 0) {\n      syncPoint.time *= -1;\n    }\n\n    return Math.abs(syncPoint.time + sumDurations({\n      defaultDuration: playlist.targetDuration,\n      durationList: playlist.segments,\n      startIndex: syncPoint.segmentIndex,\n      endIndex: 0\n    }));\n  }\n  /**\n   * Runs each sync-point strategy and returns a list of sync-points returned by the\n   * strategies\n   *\n   * @private\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Array}\n   *          A list of sync-point objects\n   */\n  ;\n\n  _proto.runStrategies_ = function runStrategies_(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = []; // Try to find a sync-point in by utilizing various strategies...\n\n    for (var i = 0; i < syncPointStrategies.length; i++) {\n      var strategy = syncPointStrategies[i];\n      var syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime);\n\n      if (syncPoint) {\n        syncPoint.strategy = strategy.name;\n        syncPoints.push({\n          strategy: strategy.name,\n          syncPoint: syncPoint\n        });\n      }\n    }\n\n    return syncPoints;\n  }\n  /**\n   * Selects the sync-point nearest the specified target\n   *\n   * @private\n   * @param {Array} syncPoints\n   *        List of sync-points to select from\n   * @param {Object} target\n   *        Object specifying the property and value we are targeting\n   * @param {string} target.key\n   *        Specifies the property to target. Must be either 'time' or 'segmentIndex'\n   * @param {number} target.value\n   *        The value to target for the specified key.\n   * @return {Object}\n   *          The sync-point nearest the target\n   */\n  ;\n\n  _proto.selectSyncPoint_ = function selectSyncPoint_(syncPoints, target) {\n    var bestSyncPoint = syncPoints[0].syncPoint;\n    var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n    var bestStrategy = syncPoints[0].strategy;\n\n    for (var i = 1; i < syncPoints.length; i++) {\n      var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n\n      if (newDistance < bestDistance) {\n        bestDistance = newDistance;\n        bestSyncPoint = syncPoints[i].syncPoint;\n        bestStrategy = syncPoints[i].strategy;\n      }\n    }\n\n    this.logger_(\"syncPoint for [\" + target.key + \": \" + target.value + \"] chosen with strategy\" + (\" [\" + bestStrategy + \"]: [time:\" + bestSyncPoint.time + \",\") + (\" segmentIndex:\" + bestSyncPoint.segmentIndex) + (typeof bestSyncPoint.partIndex === 'number' ? \",partIndex:\" + bestSyncPoint.partIndex : '') + ']');\n    return bestSyncPoint;\n  }\n  /**\n   * Save any meta-data present on the segments when segments leave\n   * the live window to the playlist to allow for synchronization at the\n   * playlist level later.\n   *\n   * @param {Playlist} oldPlaylist - The previous active playlist\n   * @param {Playlist} newPlaylist - The updated and most current playlist\n   */\n  ;\n\n  _proto.saveExpiredSegmentInfo = function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // Ignore large media sequence gaps\n\n    if (mediaSequenceDiff > MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC) {\n      videojs.log.warn(\"Not saving expired segment info. Media sequence gap \" + mediaSequenceDiff + \" is too large.\");\n      return;\n    } // When a segment expires from the playlist and it has a start time\n    // save that information as a possible sync-point reference in future\n\n\n    for (var i = mediaSequenceDiff - 1; i >= 0; i--) {\n      var lastRemovedSegment = oldPlaylist.segments[i];\n\n      if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n        newPlaylist.syncInfo = {\n          mediaSequence: oldPlaylist.mediaSequence + i,\n          time: lastRemovedSegment.start\n        };\n        this.logger_(\"playlist refresh sync: [time:\" + newPlaylist.syncInfo.time + \",\" + (\" mediaSequence: \" + newPlaylist.syncInfo.mediaSequence + \"]\"));\n        this.trigger('syncinfoupdate');\n        break;\n      }\n    }\n  }\n  /**\n   * Save the mapping from playlist's ProgramDateTime to display. This should only happen\n   * before segments start to load.\n   *\n   * @param {Playlist} playlist - The currently active playlist\n   */\n  ;\n\n  _proto.setDateTimeMappingForStart = function setDateTimeMappingForStart(playlist) {\n    // It's possible for the playlist to be updated before playback starts, meaning time\n    // zero is not yet set. If, during these playlist refreshes, a discontinuity is\n    // crossed, then the old time zero mapping (for the prior timeline) would be retained\n    // unless the mappings are cleared.\n    this.timelineToDatetimeMappings = {};\n\n    if (playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {\n      var firstSegment = playlist.segments[0];\n      var playlistTimestamp = firstSegment.dateTimeObject.getTime() / 1000;\n      this.timelineToDatetimeMappings[firstSegment.timeline] = -playlistTimestamp;\n    }\n  }\n  /**\n   * Calculates and saves timeline mappings, playlist sync info, and segment timing values\n   * based on the latest timing information.\n   *\n   * @param {Object} options\n   *        Options object\n   * @param {SegmentInfo} options.segmentInfo\n   *        The current active request information\n   * @param {boolean} options.shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved for timeline mapping and program date time mappings.\n   */\n  ;\n\n  _proto.saveSegmentTimingInfo = function saveSegmentTimingInfo(_ref) {\n    var segmentInfo = _ref.segmentInfo,\n        shouldSaveTimelineMapping = _ref.shouldSaveTimelineMapping;\n    var didCalculateSegmentTimeMapping = this.calculateSegmentTimeMapping_(segmentInfo, segmentInfo.timingInfo, shouldSaveTimelineMapping);\n    var segment = segmentInfo.segment;\n\n    if (didCalculateSegmentTimeMapping) {\n      this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information\n      // now with segment timing information\n\n      if (!segmentInfo.playlist.syncInfo) {\n        segmentInfo.playlist.syncInfo = {\n          mediaSequence: segmentInfo.playlist.mediaSequence + segmentInfo.mediaIndex,\n          time: segment.start\n        };\n      }\n    }\n\n    var dateTime = segment.dateTimeObject;\n\n    if (segment.discontinuity && shouldSaveTimelineMapping && dateTime) {\n      this.timelineToDatetimeMappings[segment.timeline] = -(dateTime.getTime() / 1000);\n    }\n  };\n\n  _proto.timestampOffsetForTimeline = function timestampOffsetForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].time;\n  };\n\n  _proto.mappingForTimeline = function mappingForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].mapping;\n  }\n  /**\n   * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n   * save that display time to the segment.\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo\n   *        The current active request information\n   * @param {Object} timingInfo\n   *        The start and end time of the current segment in \"media time\"\n   * @param {boolean} shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved in timelines.\n   * @return {boolean}\n   *          Returns false if segment time mapping could not be calculated\n   */\n  ;\n\n  _proto.calculateSegmentTimeMapping_ = function calculateSegmentTimeMapping_(segmentInfo, timingInfo, shouldSaveTimelineMapping) {\n    // TODO: remove side effects\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var mappingObj = this.timelines[segmentInfo.timeline];\n    var start;\n    var end;\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      mappingObj = {\n        time: segmentInfo.startOfSegment,\n        mapping: segmentInfo.startOfSegment - timingInfo.start\n      };\n\n      if (shouldSaveTimelineMapping) {\n        this.timelines[segmentInfo.timeline] = mappingObj;\n        this.trigger('timestampoffset');\n        this.logger_(\"time mapping for timeline \" + segmentInfo.timeline + \": \" + (\"[time: \" + mappingObj.time + \"] [mapping: \" + mappingObj.mapping + \"]\"));\n      }\n\n      start = segmentInfo.startOfSegment;\n      end = timingInfo.end + mappingObj.mapping;\n    } else if (mappingObj) {\n      start = timingInfo.start + mappingObj.mapping;\n      end = timingInfo.end + mappingObj.mapping;\n    } else {\n      return false;\n    }\n\n    if (part) {\n      part.start = start;\n      part.end = end;\n    } // If we don't have a segment start yet or the start value we got\n    // is less than our current segment.start value, save a new start value.\n    // We have to do this because parts will have segment timing info saved\n    // multiple times and we want segment start to be the earliest part start\n    // value for that segment.\n\n\n    if (!segment.start || start < segment.start) {\n      segment.start = start;\n    }\n\n    segment.end = end;\n    return true;\n  }\n  /**\n   * Each time we have discontinuity in the playlist, attempt to calculate the location\n   * in display of the start of the discontinuity and save that. We also save an accuracy\n   * value so that we save values with the most accuracy (closest to 0.)\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo - The current active request information\n   */\n  ;\n\n  _proto.saveDiscontinuitySyncInfo_ = function saveDiscontinuitySyncInfo_(segmentInfo) {\n    var playlist = segmentInfo.playlist;\n    var segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where\n    // the start of the range and it's accuracy is 0 (greater accuracy values\n    // mean more approximation)\n\n    if (segment.discontinuity) {\n      this.discontinuities[segment.timeline] = {\n        time: segment.start,\n        accuracy: 0\n      };\n    } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      // Search for future discontinuities that we can provide better timing\n      // information for and save that information for sync purposes\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n        var accuracy = Math.abs(mediaIndexDiff);\n\n        if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n          var time = void 0;\n\n          if (mediaIndexDiff < 0) {\n            time = segment.start - sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex,\n              endIndex: segmentIndex\n            });\n          } else {\n            time = segment.end + sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex + 1,\n              endIndex: segmentIndex\n            });\n          }\n\n          this.discontinuities[discontinuity] = {\n            time: time,\n            accuracy: accuracy\n          };\n        }\n      }\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.off();\n  };\n\n  return SyncController;\n}(videojs.EventTarget);\n\n/**\n * The TimelineChangeController acts as a source for segment loaders to listen for and\n * keep track of latest and pending timeline changes. This is useful to ensure proper\n * sync, as each loader may need to make a consideration for what timeline the other\n * loader is on before making changes which could impact the other loader's media.\n *\n * @class TimelineChangeController\n * @extends videojs.EventTarget\n */\n\nvar TimelineChangeController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(TimelineChangeController, _videojs$EventTarget);\n\n  function TimelineChangeController() {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.pendingTimelineChanges_ = {};\n    _this.lastTimelineChanges_ = {};\n    return _this;\n  }\n\n  var _proto = TimelineChangeController.prototype;\n\n  _proto.clearPendingTimelineChange = function clearPendingTimelineChange(type) {\n    this.pendingTimelineChanges_[type] = null;\n    this.trigger('pendingtimelinechange');\n  };\n\n  _proto.pendingTimelineChange = function pendingTimelineChange(_ref) {\n    var type = _ref.type,\n        from = _ref.from,\n        to = _ref.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.pendingTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      this.trigger('pendingtimelinechange');\n    }\n\n    return this.pendingTimelineChanges_[type];\n  };\n\n  _proto.lastTimelineChange = function lastTimelineChange(_ref2) {\n    var type = _ref2.type,\n        from = _ref2.from,\n        to = _ref2.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.lastTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      delete this.pendingTimelineChanges_[type];\n      this.trigger('timelinechange');\n    }\n\n    return this.lastTimelineChanges_[type];\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.pendingTimelineChanges_ = {};\n    this.lastTimelineChanges_ = {};\n    this.off();\n  };\n\n  return TimelineChangeController;\n}(videojs.EventTarget);\n\n/* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\nvar workerCode = transform(getWorkerString(function () {\n\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\n  function createCommonjsModule(fn, basedir, module) {\n    return module = {\n      path: basedir,\n      exports: {},\n      require: function require(path, base) {\n        return commonjsRequire(path, base === undefined || base === null ? module.path : base);\n      }\n    }, fn(module, module.exports), module.exports;\n  }\n\n  function commonjsRequire() {\n    throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');\n  }\n\n  var createClass = createCommonjsModule(function (module) {\n    function _defineProperties(target, props) {\n      for (var i = 0; i < props.length; i++) {\n        var descriptor = props[i];\n        descriptor.enumerable = descriptor.enumerable || false;\n        descriptor.configurable = true;\n        if (\"value\" in descriptor) descriptor.writable = true;\n        Object.defineProperty(target, descriptor.key, descriptor);\n      }\n    }\n\n    function _createClass(Constructor, protoProps, staticProps) {\n      if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n      if (staticProps) _defineProperties(Constructor, staticProps);\n      return Constructor;\n    }\n\n    module.exports = _createClass;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var setPrototypeOf = createCommonjsModule(function (module) {\n    function _setPrototypeOf(o, p) {\n      module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n        o.__proto__ = p;\n        return o;\n      };\n\n      module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n      return _setPrototypeOf(o, p);\n    }\n\n    module.exports = _setPrototypeOf;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var inheritsLoose = createCommonjsModule(function (module) {\n    function _inheritsLoose(subClass, superClass) {\n      subClass.prototype = Object.create(superClass.prototype);\n      subClass.prototype.constructor = subClass;\n      setPrototypeOf(subClass, superClass);\n    }\n\n    module.exports = _inheritsLoose;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  /**\n   * @file stream.js\n   */\n\n  /**\n   * A lightweight readable stream implemention that handles event dispatching.\n   *\n   * @class Stream\n   */\n\n  var Stream = /*#__PURE__*/function () {\n    function Stream() {\n      this.listeners = {};\n    }\n    /**\n     * Add a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener the callback to be invoked when an event of\n     * the specified type occurs\n     */\n\n\n    var _proto = Stream.prototype;\n\n    _proto.on = function on(type, listener) {\n      if (!this.listeners[type]) {\n        this.listeners[type] = [];\n      }\n\n      this.listeners[type].push(listener);\n    }\n    /**\n     * Remove a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener  a function previously registered for this\n     * type of event through `on`\n     * @return {boolean} if we could turn it off or not\n     */\n    ;\n\n    _proto.off = function off(type, listener) {\n      if (!this.listeners[type]) {\n        return false;\n      }\n\n      var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n      // In Video.js we slice listener functions\n      // on trigger so that it does not mess up the order\n      // while we loop through.\n      //\n      // Here we slice on off so that the loop in trigger\n      // can continue using it's old reference to loop without\n      // messing up the order.\n\n      this.listeners[type] = this.listeners[type].slice(0);\n      this.listeners[type].splice(index, 1);\n      return index > -1;\n    }\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     *\n     * @param {string} type the event name\n     */\n    ;\n\n    _proto.trigger = function trigger(type) {\n      var callbacks = this.listeners[type];\n\n      if (!callbacks) {\n        return;\n      } // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n\n\n      if (arguments.length === 2) {\n        var length = callbacks.length;\n\n        for (var i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        var args = Array.prototype.slice.call(arguments, 1);\n        var _length = callbacks.length;\n\n        for (var _i = 0; _i < _length; ++_i) {\n          callbacks[_i].apply(this, args);\n        }\n      }\n    }\n    /**\n     * Destroys the stream and cleans up.\n     */\n    ;\n\n    _proto.dispose = function dispose() {\n      this.listeners = {};\n    }\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     *\n     * @param {Stream} destination the stream that will receive all `data` events\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n    ;\n\n    _proto.pipe = function pipe(destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n    };\n\n    return Stream;\n  }();\n  /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */\n\n  /**\n   * Returns the subarray of a Uint8Array without PKCS#7 padding.\n   *\n   * @param padded {Uint8Array} unencrypted bytes that have been padded\n   * @return {Uint8Array} the unpadded bytes\n   * @see http://tools.ietf.org/html/rfc5652\n   */\n\n\n  function unpad(padded) {\n    return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n  }\n  /*! @name aes-decrypter @version 3.1.3 @license Apache-2.0 */\n\n  /**\n   * @file aes.js\n   *\n   * This file contains an adaptation of the AES decryption algorithm\n   * from the Standford Javascript Cryptography Library. That work is\n   * covered by the following copyright and permissions notice:\n   *\n   * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n   * All rights reserved.\n   *\n   * Redistribution and use in source and binary forms, with or without\n   * modification, are permitted provided that the following conditions are\n   * met:\n   *\n   * 1. Redistributions of source code must retain the above copyright\n   *    notice, this list of conditions and the following disclaimer.\n   *\n   * 2. Redistributions in binary form must reproduce the above\n   *    copyright notice, this list of conditions and the following\n   *    disclaimer in the documentation and/or other materials provided\n   *    with the distribution.\n   *\n   * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n   * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n   *\n   * The views and conclusions contained in the software and documentation\n   * are those of the authors and should not be interpreted as representing\n   * official policies, either expressed or implied, of the authors.\n   */\n\n  /**\n   * Expand the S-box tables.\n   *\n   * @private\n   */\n\n\n  var precompute = function precompute() {\n    var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n    var encTable = tables[0];\n    var decTable = tables[1];\n    var sbox = encTable[4];\n    var sboxInv = decTable[4];\n    var i;\n    var x;\n    var xInv;\n    var d = [];\n    var th = [];\n    var x2;\n    var x4;\n    var x8;\n    var s;\n    var tEnc;\n    var tDec; // Compute double and third tables\n\n    for (i = 0; i < 256; i++) {\n      th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n    }\n\n    for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n      // Compute sbox\n      s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n      s = s >> 8 ^ s & 255 ^ 99;\n      sbox[x] = s;\n      sboxInv[s] = x; // Compute MixColumns\n\n      x8 = d[x4 = d[x2 = d[x]]];\n      tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n      tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n      for (i = 0; i < 4; i++) {\n        encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n        decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n      }\n    } // Compactify. Considerable speedup on Firefox.\n\n\n    for (i = 0; i < 5; i++) {\n      encTable[i] = encTable[i].slice(0);\n      decTable[i] = decTable[i].slice(0);\n    }\n\n    return tables;\n  };\n\n  var aesTables = null;\n  /**\n   * Schedule out an AES key for both encryption and decryption. This\n   * is a low-level class. Use a cipher mode to do bulk encryption.\n   *\n   * @class AES\n   * @param key {Array} The key as an array of 4, 6 or 8 words.\n   */\n\n  var AES = /*#__PURE__*/function () {\n    function AES(key) {\n      /**\n      * The expanded S-box and inverse S-box tables. These will be computed\n      * on the client so that we don't have to send them down the wire.\n      *\n      * There are two tables, _tables[0] is for encryption and\n      * _tables[1] is for decryption.\n      *\n      * The first 4 sub-tables are the expanded S-box with MixColumns. The\n      * last (_tables[01][4]) is the S-box itself.\n      *\n      * @private\n      */\n      // if we have yet to precompute the S-box tables\n      // do so now\n      if (!aesTables) {\n        aesTables = precompute();\n      } // then make a copy of that object for use\n\n\n      this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n      var i;\n      var j;\n      var tmp;\n      var sbox = this._tables[0][4];\n      var decTable = this._tables[1];\n      var keyLen = key.length;\n      var rcon = 1;\n\n      if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n        throw new Error('Invalid aes key size');\n      }\n\n      var encKey = key.slice(0);\n      var decKey = [];\n      this._key = [encKey, decKey]; // schedule encryption keys\n\n      for (i = keyLen; i < 4 * keyLen + 28; i++) {\n        tmp = encKey[i - 1]; // apply sbox\n\n        if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n          tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n          if (i % keyLen === 0) {\n            tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n            rcon = rcon << 1 ^ (rcon >> 7) * 283;\n          }\n        }\n\n        encKey[i] = encKey[i - keyLen] ^ tmp;\n      } // schedule decryption keys\n\n\n      for (j = 0; i; j++, i--) {\n        tmp = encKey[j & 3 ? i : i - 4];\n\n        if (i <= 4 || j < 4) {\n          decKey[j] = tmp;\n        } else {\n          decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n        }\n      }\n    }\n    /**\n     * Decrypt 16 bytes, specified as four 32-bit words.\n     *\n     * @param {number} encrypted0 the first word to decrypt\n     * @param {number} encrypted1 the second word to decrypt\n     * @param {number} encrypted2 the third word to decrypt\n     * @param {number} encrypted3 the fourth word to decrypt\n     * @param {Int32Array} out the array to write the decrypted words\n     * into\n     * @param {number} offset the offset into the output array to start\n     * writing results\n     * @return {Array} The plaintext.\n     */\n\n\n    var _proto = AES.prototype;\n\n    _proto.decrypt = function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n      var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n      var a = encrypted0 ^ key[0];\n      var b = encrypted3 ^ key[1];\n      var c = encrypted2 ^ key[2];\n      var d = encrypted1 ^ key[3];\n      var a2;\n      var b2;\n      var c2; // key.length === 2 ?\n\n      var nInnerRounds = key.length / 4 - 2;\n      var i;\n      var kIndex = 4;\n      var table = this._tables[1]; // load up the tables\n\n      var table0 = table[0];\n      var table1 = table[1];\n      var table2 = table[2];\n      var table3 = table[3];\n      var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n      for (i = 0; i < nInnerRounds; i++) {\n        a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n        b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n        c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n        d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n        kIndex += 4;\n        a = a2;\n        b = b2;\n        c = c2;\n      } // Last round.\n\n\n      for (i = 0; i < 4; i++) {\n        out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n        a2 = a;\n        a = b;\n        b = c;\n        c = d;\n        d = a2;\n      }\n    };\n\n    return AES;\n  }();\n  /**\n   * A wrapper around the Stream class to use setTimeout\n   * and run stream \"jobs\" Asynchronously\n   *\n   * @class AsyncStream\n   * @extends Stream\n   */\n\n\n  var AsyncStream = /*#__PURE__*/function (_Stream) {\n    inheritsLoose(AsyncStream, _Stream);\n\n    function AsyncStream() {\n      var _this;\n\n      _this = _Stream.call(this, Stream) || this;\n      _this.jobs = [];\n      _this.delay = 1;\n      _this.timeout_ = null;\n      return _this;\n    }\n    /**\n     * process an async job\n     *\n     * @private\n     */\n\n\n    var _proto = AsyncStream.prototype;\n\n    _proto.processJob_ = function processJob_() {\n      this.jobs.shift()();\n\n      if (this.jobs.length) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      } else {\n        this.timeout_ = null;\n      }\n    }\n    /**\n     * push a job into the stream\n     *\n     * @param {Function} job the job to push into the stream\n     */\n    ;\n\n    _proto.push = function push(job) {\n      this.jobs.push(job);\n\n      if (!this.timeout_) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      }\n    };\n\n    return AsyncStream;\n  }(Stream);\n  /**\n   * Convert network-order (big-endian) bytes into their little-endian\n   * representation.\n   */\n\n\n  var ntoh = function ntoh(word) {\n    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n  };\n  /**\n   * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * use for the first round of CBC.\n   * @return {Uint8Array} the decrypted bytes\n   *\n   * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n   * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n   * @see https://tools.ietf.org/html/rfc2315\n   */\n\n\n  var decrypt = function decrypt(encrypted, key, initVector) {\n    // word-level access to the encrypted bytes\n    var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n    var decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n    var decrypted = new Uint8Array(encrypted.byteLength);\n    var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n    // decrypted data\n\n    var init0;\n    var init1;\n    var init2;\n    var init3;\n    var encrypted0;\n    var encrypted1;\n    var encrypted2;\n    var encrypted3; // iteration variable\n\n    var wordIx; // pull out the words of the IV to ensure we don't modify the\n    // passed-in reference and easier access\n\n    init0 = initVector[0];\n    init1 = initVector[1];\n    init2 = initVector[2];\n    init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n    // to each decrypted block\n\n    for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n      // convert big-endian (network order) words into little-endian\n      // (javascript order)\n      encrypted0 = ntoh(encrypted32[wordIx]);\n      encrypted1 = ntoh(encrypted32[wordIx + 1]);\n      encrypted2 = ntoh(encrypted32[wordIx + 2]);\n      encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n      decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n      // plaintext\n\n      decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n      decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n      decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n      decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n      init0 = encrypted0;\n      init1 = encrypted1;\n      init2 = encrypted2;\n      init3 = encrypted3;\n    }\n\n    return decrypted;\n  };\n  /**\n   * The `Decrypter` class that manages decryption of AES\n   * data through `AsyncStream` objects and the `decrypt`\n   * function\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * @param {Function} done the function to run when done\n   * @class Decrypter\n   */\n\n\n  var Decrypter = /*#__PURE__*/function () {\n    function Decrypter(encrypted, key, initVector, done) {\n      var step = Decrypter.STEP;\n      var encrypted32 = new Int32Array(encrypted.buffer);\n      var decrypted = new Uint8Array(encrypted.byteLength);\n      var i = 0;\n      this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously\n\n      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n\n      for (i = step; i < encrypted32.length; i += step) {\n        initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n        this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n      } // invoke the done() callback when everything is finished\n\n\n      this.asyncStream_.push(function () {\n        // remove pkcs#7 padding from the decrypted bytes\n        done(null, unpad(decrypted));\n      });\n    }\n    /**\n     * a getter for step the maximum number of bytes to process at one time\n     *\n     * @return {number} the value of step 32000\n     */\n\n\n    var _proto = Decrypter.prototype;\n    /**\n     * @private\n     */\n\n    _proto.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {\n      return function () {\n        var bytes = decrypt(encrypted, key, initVector);\n        decrypted.set(bytes, encrypted.byteOffset);\n      };\n    };\n\n    createClass(Decrypter, null, [{\n      key: \"STEP\",\n      get: function get() {\n        // 4 * 8000;\n        return 32000;\n      }\n    }]);\n    return Decrypter;\n  }();\n\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n\n  var isArrayBufferView = function isArrayBufferView(obj) {\n    if (ArrayBuffer.isView === 'function') {\n      return ArrayBuffer.isView(obj);\n    }\n\n    return obj && obj.buffer instanceof ArrayBuffer;\n  };\n\n  var BigInt = window_1.BigInt || Number;\n  [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\n\n  (function () {\n    var a = new Uint16Array([0xFFCC]);\n    var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);\n\n    if (b[0] === 0xFF) {\n      return 'big';\n    }\n\n    if (b[0] === 0xCC) {\n      return 'little';\n    }\n\n    return 'unknown';\n  })();\n  /**\n   * Creates an object for sending to a web worker modifying properties that are TypedArrays\n   * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n   *\n   * @param {Object} message\n   *        Object of properties and values to send to the web worker\n   * @return {Object}\n   *         Modified message with TypedArray values expanded\n   * @function createTransferableMessage\n   */\n\n\n  var createTransferableMessage = function createTransferableMessage(message) {\n    var transferable = {};\n    Object.keys(message).forEach(function (key) {\n      var value = message[key];\n\n      if (isArrayBufferView(value)) {\n        transferable[key] = {\n          bytes: value.buffer,\n          byteOffset: value.byteOffset,\n          byteLength: value.byteLength\n        };\n      } else {\n        transferable[key] = value;\n      }\n    });\n    return transferable;\n  };\n  /* global self */\n\n  /**\n   * Our web worker interface so that things can talk to aes-decrypter\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   */\n\n\n  self.onmessage = function (event) {\n    var data = event.data;\n    var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n    var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n    var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n    /* eslint-disable no-new, handle-callback-err */\n\n    new Decrypter(encrypted, key, iv, function (err, bytes) {\n      self.postMessage(createTransferableMessage({\n        source: data.source,\n        decrypted: bytes\n      }), [bytes.buffer]);\n    });\n    /* eslint-enable */\n  };\n}));\nvar Decrypter = factory(workerCode);\n/* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n\n/**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\n\nvar audioTrackKind_ = function audioTrackKind_(properties) {\n  var kind = properties.default ? 'main' : 'alternative';\n\n  if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n    kind = 'main-desc';\n  }\n\n  return kind;\n};\n/**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n *        SegmentLoader to pause\n * @param {Object} mediaType\n *        Active media type\n * @function stopLoaders\n */\n\n\nvar stopLoaders = function stopLoaders(segmentLoader, mediaType) {\n  segmentLoader.abort();\n  segmentLoader.pause();\n\n  if (mediaType && mediaType.activePlaylistLoader) {\n    mediaType.activePlaylistLoader.pause();\n    mediaType.activePlaylistLoader = null;\n  }\n};\n/**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n *        PlaylistLoader to start loading\n * @param {Object} mediaType\n *        Active media type\n * @function startLoaders\n */\n\nvar startLoaders = function startLoaders(playlistLoader, mediaType) {\n  // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n  // playlist loader\n  mediaType.activePlaylistLoader = playlistLoader;\n  playlistLoader.load();\n};\n/**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a non-destructive resync of SegmentLoader when the active media\n *         group changes.\n * @function onGroupChanged\n */\n\nvar onGroupChanged = function onGroupChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoad = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad[type],\n        mainSegmentLoader = _settings$segmentLoad.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastGroup = mediaType.lastGroup_; // the group did not change do nothing\n\n    if (activeGroup && lastGroup && activeGroup.id === lastGroup.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup || activeGroup.isMasterPlaylist) {\n      // there is no group active or active group is a main playlist and won't change\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      if (previousActiveLoader) {\n        // The previous group had a playlist loader but the new active group does not\n        // this means we are switching from demuxed to muxed audio. In this case we want to\n        // do a destructive reset of the main segment loader and not restart the audio\n        // loaders.\n        mainSegmentLoader.resetEverything();\n      }\n\n      return;\n    } // Non-destructive resync\n\n\n    segmentLoader.resyncLoader();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\nvar onGroupChanging = function onGroupChanging(type, settings) {\n  return function () {\n    var segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    mediaType.lastGroup_ = null;\n    segmentLoader.abort();\n    segmentLoader.pause();\n  };\n};\n/**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a destructive reset of SegmentLoader when the active media\n *         track changes.\n * @function onTrackChanged\n */\n\nvar onTrackChanged = function onTrackChanged(type, settings) {\n  return function () {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        _settings$segmentLoad2 = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad2[type],\n        mainSegmentLoader = _settings$segmentLoad2.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastTrack = mediaType.lastTrack_; // track did not change, do nothing\n\n    if (lastTrack && activeTrack && lastTrack.id === activeTrack.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active so we do not want to restart loaders\n      return;\n    }\n\n    if (activeGroup.isMasterPlaylist) {\n      // track did not change, do nothing\n      if (!activeTrack || !lastTrack || activeTrack.id === lastTrack.id) {\n        return;\n      }\n\n      var mpc = settings.vhs.masterPlaylistController_;\n      var newPlaylist = mpc.selectPlaylist(); // media will not change do nothing\n\n      if (mpc.media() === newPlaylist) {\n        return;\n      }\n\n      mediaType.logger_(\"track change. Switching master audio from \" + lastTrack.id + \" to \" + activeTrack.id);\n      masterPlaylistLoader.pause();\n      mainSegmentLoader.resetEverything();\n      mpc.fastQualityChange_(newPlaylist);\n      return;\n    }\n\n    if (type === 'AUDIO') {\n      if (!activeGroup.playlistLoader) {\n        // when switching from demuxed audio/video to muxed audio/video (noted by no\n        // playlist loader for the audio group), we want to do a destructive reset of the\n        // main segment loader and not restart the audio loaders\n        mainSegmentLoader.setAudio(true); // don't have to worry about disabling the audio of the audio segment loader since\n        // it should be stopped\n\n        mainSegmentLoader.resetEverything();\n        return;\n      } // although the segment loader is an audio segment loader, call the setAudio\n      // function to ensure it is prepared to re-append the init segment (or handle other\n      // config changes)\n\n\n      segmentLoader.setAudio(true);\n      mainSegmentLoader.setAudio(false);\n    }\n\n    if (previousActiveLoader === activeGroup.playlistLoader) {\n      // Nothing has actually changed. This can happen because track change events can fire\n      // multiple times for a \"single\" change. One for enabling the new active track, and\n      // one for disabling the track that was active\n      startLoaders(activeGroup.playlistLoader, mediaType);\n      return;\n    }\n\n    if (segmentLoader.track) {\n      // For WebVTT, set the new text track in the segmentloader\n      segmentLoader.track(activeTrack);\n    } // destructive reset\n\n\n    segmentLoader.resetEverything();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\nvar onError = {\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning (or error if the playlist is blacklisted) to\n   *         console and switches back to default audio track.\n   * @function onError.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type],\n          blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;\n      stopLoaders(segmentLoader, mediaType); // switch back to default audio track\n\n      var activeTrack = mediaType.activeTrack();\n      var activeGroup = mediaType.activeGroup();\n      var id = (activeGroup.filter(function (group) {\n        return group.default;\n      })[0] || activeGroup[0]).id;\n      var defaultTrack = mediaType.tracks[id];\n\n      if (activeTrack === defaultTrack) {\n        // Default track encountered an error. All we can do now is blacklist the current\n        // rendition and hope another will switch audio groups\n        blacklistCurrentPlaylist({\n          message: 'Problem encountered loading the default audio track.'\n        });\n        return;\n      }\n\n      videojs.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n\n      for (var trackId in mediaType.tracks) {\n        mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n      }\n\n      mediaType.onTrackChanged();\n    };\n  },\n\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning to console and disables the active subtitle track\n   * @function onError.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type];\n      videojs.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n      stopLoaders(segmentLoader, mediaType);\n      var track = mediaType.activeTrack();\n\n      if (track) {\n        track.mode = 'disabled';\n      }\n\n      mediaType.onTrackChanged();\n    };\n  }\n};\nvar setupListeners = {\n  /**\n   * Setup event listeners for audio playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.AUDIO\n   */\n  AUDIO: function AUDIO(type, playlistLoader, settings) {\n    if (!playlistLoader) {\n      // no playlist loader means audio will be muxed with the video\n      return;\n    }\n\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup event listeners for subtitle playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions);\n      segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  }\n};\nvar initialize = {\n  /**\n   * Setup PlaylistLoaders and AudioTracks for the audio groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.AUDIO\n   */\n  'AUDIO': function AUDIO(type, settings) {\n    var vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$ = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$.groups,\n        tracks = _settings$mediaTypes$.tracks,\n        logger_ = _settings$mediaTypes$.logger_,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n    var audioOnlyMaster = isAudioOnly(masterPlaylistLoader.master); // force a default if we have none\n\n    if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {\n      mediaGroups[type] = {\n        main: {\n          default: {\n            default: true\n          }\n        }\n      };\n\n      if (audioOnlyMaster) {\n        mediaGroups[type].main.default.playlists = masterPlaylistLoader.master.playlists;\n      }\n    }\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (audioOnlyMaster) {\n          logger_(\"AUDIO group '\" + groupId + \"' label '\" + variantLabel + \"' is a master playlist\");\n          properties.isMasterPlaylist = true;\n          playlistLoader = null; // if vhs-json was provided as the source, and the media playlist was resolved,\n          // use the resolved media playlist object\n        } else if (sourceType === 'vhs-json' && properties.playlists) {\n          playlistLoader = new PlaylistLoader(properties.playlists[0], vhs, requestOptions);\n        } else if (properties.resolvedUri) {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions); // TODO: dash isn't the only type with properties.playlists\n          // should we even have properties.playlists in this check.\n        } else if (properties.playlists && sourceType === 'dash') {\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else {\n          // no resolvedUri means the audio is muxed with the video when using this\n          // audio track\n          playlistLoader = null;\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = new videojs.AudioTrack({\n            id: variantLabel,\n            kind: audioTrackKind_(properties),\n            enabled: false,\n            language: properties.language,\n            default: properties.default,\n            label: variantLabel\n          });\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup PlaylistLoaders and TextTracks for the subtitle groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.SUBTITLES\n   */\n  'SUBTITLES': function SUBTITLES(type, settings) {\n    var tech = settings.tech,\n        vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$2 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$2.groups,\n        tracks = _settings$mediaTypes$2.tracks,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        if (mediaGroups[type][groupId][variantLabel].forced) {\n          // Subtitle playlists with the forced attribute are not selectable in Safari.\n          // According to Apple's HLS Authoring Specification:\n          //   If content has forced subtitles and regular subtitles in a given language,\n          //   the regular subtitles track in that language MUST contain both the forced\n          //   subtitles and the regular subtitles for that language.\n          // Because of this requirement and that Safari does not add forced subtitles,\n          // forced subtitles are skipped here to maintain consistent experience across\n          // all platforms\n          continue;\n        }\n\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (sourceType === 'hls') {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions);\n        } else if (sourceType === 'dash') {\n          var playlists = properties.playlists.filter(function (p) {\n            return p.excludeUntil !== Infinity;\n          });\n\n          if (!playlists.length) {\n            return;\n          }\n\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else if (sourceType === 'vhs-json') {\n          playlistLoader = new PlaylistLoader( // if the vhs-json object included the media playlist, use the media playlist\n          // as provided, otherwise use the resolved URI to load the playlist\n          properties.playlists ? properties.playlists[0] : properties.resolvedUri, vhs, requestOptions);\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: variantLabel,\n            kind: 'subtitles',\n            default: properties.default && properties.autoselect,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup TextTracks for the closed-caption groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize['CLOSED-CAPTIONS']\n   */\n  'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {\n    var tech = settings.tech,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$3 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$3.groups,\n        tracks = _settings$mediaTypes$3.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel]; // Look for either 608 (CCn) or 708 (SERVICEn) caption services\n\n        if (!/^(?:CC|SERVICE)/.test(properties.instreamId)) {\n          continue;\n        }\n\n        var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n        var newProps = {\n          label: variantLabel,\n          language: properties.language,\n          instreamId: properties.instreamId,\n          default: properties.default && properties.autoselect\n        };\n\n        if (captionServices[newProps.instreamId]) {\n          newProps = videojs.mergeOptions(newProps, captionServices[newProps.instreamId]);\n        }\n\n        if (newProps.default === undefined) {\n          delete newProps.default;\n        } // No PlaylistLoader is required for Closed-Captions because the captions are\n        // embedded within the video stream\n\n\n        groups[groupId].push(videojs.mergeOptions({\n          id: variantLabel\n        }, properties));\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: newProps.instreamId,\n            kind: 'captions',\n            default: newProps.default,\n            language: newProps.language,\n            label: newProps.label\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n  }\n};\n\nvar groupMatch = function groupMatch(list, media) {\n  for (var i = 0; i < list.length; i++) {\n    if (playlistMatch(media, list[i])) {\n      return true;\n    }\n\n    if (list[i].playlists && groupMatch(list[i].playlists, media)) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Returns a function used to get the active group of the provided type\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Function that returns the active media group for the provided type. Takes an\n *         optional parameter {TextTrack} track. If no track is provided, a list of all\n *         variants in the group, otherwise the variant corresponding to the provided\n *         track is returned.\n * @function activeGroup\n */\n\n\nvar activeGroup = function activeGroup(type, settings) {\n  return function (track) {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        groups = settings.mediaTypes[type].groups;\n    var media = masterPlaylistLoader.media();\n\n    if (!media) {\n      return null;\n    }\n\n    var variants = null; // set to variants to main media active group\n\n    if (media.attributes[type]) {\n      variants = groups[media.attributes[type]];\n    }\n\n    var groupKeys = Object.keys(groups);\n\n    if (!variants) {\n      // find the masterPlaylistLoader media\n      // that is in a media group if we are dealing\n      // with audio only\n      if (type === 'AUDIO' && groupKeys.length > 1 && isAudioOnly(settings.master)) {\n        for (var i = 0; i < groupKeys.length; i++) {\n          var groupPropertyList = groups[groupKeys[i]];\n\n          if (groupMatch(groupPropertyList, media)) {\n            variants = groupPropertyList;\n            break;\n          }\n        } // use the main group if it exists\n\n      } else if (groups.main) {\n        variants = groups.main; // only one group, use that one\n      } else if (groupKeys.length === 1) {\n        variants = groups[groupKeys[0]];\n      }\n    }\n\n    if (typeof track === 'undefined') {\n      return variants;\n    }\n\n    if (track === null || !variants) {\n      // An active track was specified so a corresponding group is expected. track === null\n      // means no track is currently active so there is no corresponding group\n      return null;\n    }\n\n    return variants.filter(function (props) {\n      return props.id === track.id;\n    })[0] || null;\n  };\n};\nvar activeTrack = {\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].enabled) {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  },\n\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].mode === 'showing' || tracks[id].mode === 'hidden') {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  }\n};\nvar getActiveGroup = function getActiveGroup(type, _ref) {\n  var mediaTypes = _ref.mediaTypes;\n  return function () {\n    var activeTrack_ = mediaTypes[type].activeTrack();\n\n    if (!activeTrack_) {\n      return null;\n    }\n\n    return mediaTypes[type].activeGroup(activeTrack_);\n  };\n};\n/**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the master manifest.\n *\n * @param {Object} settings\n *        Object containing required information for setting up the media groups\n * @param {Tech} settings.tech\n *        The tech of the player\n * @param {Object} settings.requestOptions\n *        XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.masterPlaylistLoader\n *        PlaylistLoader for the master source\n * @param {VhsHandler} settings.vhs\n *        VHS SourceHandler\n * @param {Object} settings.master\n *        The parsed master manifest\n * @param {Object} settings.mediaTypes\n *        Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.blacklistCurrentPlaylist\n *        Blacklists the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\n\nvar setupMediaGroups = function setupMediaGroups(settings) {\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    initialize[type](type, settings);\n  });\n  var mediaTypes = settings.mediaTypes,\n      masterPlaylistLoader = settings.masterPlaylistLoader,\n      tech = settings.tech,\n      vhs = settings.vhs,\n      _settings$segmentLoad3 = settings.segmentLoaders,\n      audioSegmentLoader = _settings$segmentLoad3['AUDIO'],\n      mainSegmentLoader = _settings$segmentLoad3.main; // setup active group and track getters and change event handlers\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n    mediaTypes[type].activeGroup = activeGroup(type, settings);\n    mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n    mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n    mediaTypes[type].onGroupChanging = onGroupChanging(type, settings);\n    mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n    mediaTypes[type].getActiveGroup = getActiveGroup(type, settings);\n  }); // DO NOT enable the default subtitle or caption track.\n  // DO enable the default audio track\n\n  var audioGroup = mediaTypes.AUDIO.activeGroup();\n\n  if (audioGroup) {\n    var groupId = (audioGroup.filter(function (group) {\n      return group.default;\n    })[0] || audioGroup[0]).id;\n    mediaTypes.AUDIO.tracks[groupId].enabled = true;\n    mediaTypes.AUDIO.onGroupChanged();\n    mediaTypes.AUDIO.onTrackChanged();\n    var activeAudioGroup = mediaTypes.AUDIO.getActiveGroup(); // a similar check for handling setAudio on each loader is run again each time the\n    // track is changed, but needs to be handled here since the track may not be considered\n    // changed on the first call to onTrackChanged\n\n    if (!activeAudioGroup.playlistLoader) {\n      // either audio is muxed with video or the stream is audio only\n      mainSegmentLoader.setAudio(true);\n    } else {\n      // audio is demuxed\n      mainSegmentLoader.setAudio(false);\n      audioSegmentLoader.setAudio(true);\n    }\n  }\n\n  masterPlaylistLoader.on('mediachange', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanged();\n    });\n  });\n  masterPlaylistLoader.on('mediachanging', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanging();\n    });\n  }); // custom audio track change event handler for usage event\n\n  var onAudioTrackChanged = function onAudioTrackChanged() {\n    mediaTypes.AUDIO.onTrackChanged();\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-audio-change'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-audio-change'\n    });\n  };\n\n  tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n  tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  vhs.on('dispose', function () {\n    tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n    tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  }); // clear existing audio tracks and add the ones we just created\n\n  tech.clearTracks('audio');\n\n  for (var id in mediaTypes.AUDIO.tracks) {\n    tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n  }\n};\n/**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n *         Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\n\nvar createMediaTypes = function createMediaTypes() {\n  var mediaTypes = {};\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    mediaTypes[type] = {\n      groups: {},\n      tracks: {},\n      activePlaylistLoader: null,\n      activeGroup: noop,\n      activeTrack: noop,\n      getActiveGroup: noop,\n      onGroupChanged: noop,\n      onTrackChanged: noop,\n      lastTrack_: null,\n      logger_: logger(\"MediaGroups[\" + type + \"]\")\n    };\n  });\n  return mediaTypes;\n};\n\nvar ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;\nvar Vhs$1; // SegmentLoader stats that need to have each loader's\n// values summed to calculate the final value\n\nvar loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred', 'mediaAppends'];\n\nvar sumLoaderStat = function sumLoaderStat(stat) {\n  return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n};\n\nvar shouldSwitchToMedia = function shouldSwitchToMedia(_ref) {\n  var currentPlaylist = _ref.currentPlaylist,\n      buffered = _ref.buffered,\n      currentTime = _ref.currentTime,\n      nextPlaylist = _ref.nextPlaylist,\n      bufferLowWaterLine = _ref.bufferLowWaterLine,\n      bufferHighWaterLine = _ref.bufferHighWaterLine,\n      duration = _ref.duration,\n      experimentalBufferBasedABR = _ref.experimentalBufferBasedABR,\n      log = _ref.log;\n\n  // we have no other playlist to switch to\n  if (!nextPlaylist) {\n    videojs.log.warn('We received no playlist to switch to. Please check your stream.');\n    return false;\n  }\n\n  var sharedLogLine = \"allowing switch \" + (currentPlaylist && currentPlaylist.id || 'null') + \" -> \" + nextPlaylist.id;\n\n  if (!currentPlaylist) {\n    log(sharedLogLine + \" as current playlist is not set\");\n    return true;\n  } // no need to switch if playlist is the same\n\n\n  if (nextPlaylist.id === currentPlaylist.id) {\n    return false;\n  } // determine if current time is in a buffered range.\n\n\n  var isBuffered = Boolean(findRange(buffered, currentTime).length); // If the playlist is live, then we want to not take low water line into account.\n  // This is because in LIVE, the player plays 3 segments from the end of the\n  // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n  // in those segments, a viewer will never experience a rendition upswitch.\n\n  if (!currentPlaylist.endList) {\n    // For LLHLS live streams, don't switch renditions before playback has started, as it almost\n    // doubles the time to first playback.\n    if (!isBuffered && typeof currentPlaylist.partTargetDuration === 'number') {\n      log(\"not \" + sharedLogLine + \" as current playlist is live llhls, but currentTime isn't in buffered.\");\n      return false;\n    }\n\n    log(sharedLogLine + \" as current playlist is live\");\n    return true;\n  }\n\n  var forwardBuffer = timeAheadOf(buffered, currentTime);\n  var maxBufferLowWaterLine = experimentalBufferBasedABR ? Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE : Config.MAX_BUFFER_LOW_WATER_LINE; // For the same reason as LIVE, we ignore the low water line when the VOD\n  // duration is below the max potential low water line\n\n  if (duration < maxBufferLowWaterLine) {\n    log(sharedLogLine + \" as duration < max low water line (\" + duration + \" < \" + maxBufferLowWaterLine + \")\");\n    return true;\n  }\n\n  var nextBandwidth = nextPlaylist.attributes.BANDWIDTH;\n  var currBandwidth = currentPlaylist.attributes.BANDWIDTH; // when switching down, if our buffer is lower than the high water line,\n  // we can switch down\n\n  if (nextBandwidth < currBandwidth && (!experimentalBufferBasedABR || forwardBuffer < bufferHighWaterLine)) {\n    var logLine = sharedLogLine + \" as next bandwidth < current bandwidth (\" + nextBandwidth + \" < \" + currBandwidth + \")\";\n\n    if (experimentalBufferBasedABR) {\n      logLine += \" and forwardBuffer < bufferHighWaterLine (\" + forwardBuffer + \" < \" + bufferHighWaterLine + \")\";\n    }\n\n    log(logLine);\n    return true;\n  } // and if our buffer is higher than the low water line,\n  // we can switch up\n\n\n  if ((!experimentalBufferBasedABR || nextBandwidth > currBandwidth) && forwardBuffer >= bufferLowWaterLine) {\n    var _logLine = sharedLogLine + \" as forwardBuffer >= bufferLowWaterLine (\" + forwardBuffer + \" >= \" + bufferLowWaterLine + \")\";\n\n    if (experimentalBufferBasedABR) {\n      _logLine += \" and next bandwidth > current bandwidth (\" + nextBandwidth + \" > \" + currBandwidth + \")\";\n    }\n\n    log(_logLine);\n    return true;\n  }\n\n  log(\"not \" + sharedLogLine + \" as no switching criteria met\");\n  return false;\n};\n/**\n * the master playlist controller controller all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a master playlist and a series of audio playlists\n * if they are available\n *\n * @class MasterPlaylistController\n * @extends videojs.EventTarget\n */\n\n\nvar MasterPlaylistController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(MasterPlaylistController, _videojs$EventTarget);\n\n  function MasterPlaylistController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    var src = options.src,\n        handleManifestRedirects = options.handleManifestRedirects,\n        withCredentials = options.withCredentials,\n        tech = options.tech,\n        bandwidth = options.bandwidth,\n        externVhs = options.externVhs,\n        useCueTags = options.useCueTags,\n        blacklistDuration = options.blacklistDuration,\n        enableLowInitialPlaylist = options.enableLowInitialPlaylist,\n        sourceType = options.sourceType,\n        cacheEncryptionKeys = options.cacheEncryptionKeys,\n        experimentalBufferBasedABR = options.experimentalBufferBasedABR,\n        experimentalLeastPixelDiffSelector = options.experimentalLeastPixelDiffSelector,\n        captionServices = options.captionServices;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or JSON manifest string is required');\n    }\n\n    var maxPlaylistRetries = options.maxPlaylistRetries;\n\n    if (maxPlaylistRetries === null || typeof maxPlaylistRetries === 'undefined') {\n      maxPlaylistRetries = Infinity;\n    }\n\n    Vhs$1 = externVhs;\n    _this.experimentalBufferBasedABR = Boolean(experimentalBufferBasedABR);\n    _this.experimentalLeastPixelDiffSelector = Boolean(experimentalLeastPixelDiffSelector);\n    _this.withCredentials = withCredentials;\n    _this.tech_ = tech;\n    _this.vhs_ = tech.vhs;\n    _this.sourceType_ = sourceType;\n    _this.useCueTags_ = useCueTags;\n    _this.blacklistDuration = blacklistDuration;\n    _this.maxPlaylistRetries = maxPlaylistRetries;\n    _this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n\n    if (_this.useCueTags_) {\n      _this.cueTagsTrack_ = _this.tech_.addTextTrack('metadata', 'ad-cues');\n      _this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n    }\n\n    _this.requestOptions_ = {\n      withCredentials: withCredentials,\n      handleManifestRedirects: handleManifestRedirects,\n      maxPlaylistRetries: maxPlaylistRetries,\n      timeout: null\n    };\n\n    _this.on('error', _this.pauseLoading);\n\n    _this.mediaTypes_ = createMediaTypes();\n    _this.mediaSource = new window$1.MediaSource();\n    _this.handleDurationChange_ = _this.handleDurationChange_.bind(_assertThisInitialized(_this));\n    _this.handleSourceOpen_ = _this.handleSourceOpen_.bind(_assertThisInitialized(_this));\n    _this.handleSourceEnded_ = _this.handleSourceEnded_.bind(_assertThisInitialized(_this));\n\n    _this.mediaSource.addEventListener('durationchange', _this.handleDurationChange_); // load the media source into the player\n\n\n    _this.mediaSource.addEventListener('sourceopen', _this.handleSourceOpen_);\n\n    _this.mediaSource.addEventListener('sourceended', _this.handleSourceEnded_); // we don't have to handle sourceclose since dispose will handle termination of\n    // everything, and the MediaSource should not be detached without a proper disposal\n\n\n    _this.seekable_ = videojs.createTimeRanges();\n    _this.hasPlayed_ = false;\n    _this.syncController_ = new SyncController(options);\n    _this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'segment-metadata'\n    }, false).track;\n    _this.decrypter_ = new Decrypter();\n    _this.sourceUpdater_ = new SourceUpdater(_this.mediaSource);\n    _this.inbandTextTracks_ = {};\n    _this.timelineChangeController_ = new TimelineChangeController();\n    var segmentLoaderSettings = {\n      vhs: _this.vhs_,\n      parse708captions: options.parse708captions,\n      useDtsForTimestampOffset: options.useDtsForTimestampOffset,\n      captionServices: captionServices,\n      mediaSource: _this.mediaSource,\n      currentTime: _this.tech_.currentTime.bind(_this.tech_),\n      seekable: function seekable() {\n        return _this.seekable();\n      },\n      seeking: function seeking() {\n        return _this.tech_.seeking();\n      },\n      duration: function duration() {\n        return _this.duration();\n      },\n      hasPlayed: function hasPlayed() {\n        return _this.hasPlayed_;\n      },\n      goalBufferLength: function goalBufferLength() {\n        return _this.goalBufferLength();\n      },\n      bandwidth: bandwidth,\n      syncController: _this.syncController_,\n      decrypter: _this.decrypter_,\n      sourceType: _this.sourceType_,\n      inbandTextTracks: _this.inbandTextTracks_,\n      cacheEncryptionKeys: cacheEncryptionKeys,\n      sourceUpdater: _this.sourceUpdater_,\n      timelineChangeController: _this.timelineChangeController_,\n      experimentalExactManifestTimings: options.experimentalExactManifestTimings\n    }; // The source type check not only determines whether a special DASH playlist loader\n    // should be used, but also covers the case where the provided src is a vhs-json\n    // manifest object (instead of a URL). In the case of vhs-json, the default\n    // PlaylistLoader should be used.\n\n    _this.masterPlaylistLoader_ = _this.sourceType_ === 'dash' ? new DashPlaylistLoader(src, _this.vhs_, _this.requestOptions_) : new PlaylistLoader(src, _this.vhs_, _this.requestOptions_);\n\n    _this.setupMasterPlaylistLoaderListeners_(); // setup segment loaders\n    // combined audio/video or just video when alternate audio track is selected\n\n\n    _this.mainSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      segmentMetadataTrack: _this.segmentMetadataTrack_,\n      loaderType: 'main'\n    }), options); // alternate audio track\n\n    _this.audioSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'audio'\n    }), options);\n    _this.subtitleSegmentLoader_ = new VTTSegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'vtt',\n      featuresNativeTextTracks: _this.tech_.featuresNativeTextTracks,\n      loadVttJs: function loadVttJs() {\n        return new Promise(function (resolve, reject) {\n          function onLoad() {\n            tech.off('vttjserror', onError);\n            resolve();\n          }\n\n          function onError() {\n            tech.off('vttjsloaded', onLoad);\n            reject();\n          }\n\n          tech.one('vttjsloaded', onLoad);\n          tech.one('vttjserror', onError); // safe to call multiple times, script will be loaded only once:\n\n          tech.addWebVttScript_();\n        });\n      }\n    }), options);\n\n    _this.setupSegmentLoaderListeners_();\n\n    if (_this.experimentalBufferBasedABR) {\n      _this.masterPlaylistLoader_.one('loadedplaylist', function () {\n        return _this.startABRTimer_();\n      });\n\n      _this.tech_.on('pause', function () {\n        return _this.stopABRTimer_();\n      });\n\n      _this.tech_.on('play', function () {\n        return _this.startABRTimer_();\n      });\n    } // Create SegmentLoader stat-getters\n    // mediaRequests_\n    // mediaRequestsAborted_\n    // mediaRequestsTimedout_\n    // mediaRequestsErrored_\n    // mediaTransferDuration_\n    // mediaBytesTransferred_\n    // mediaAppends_\n\n\n    loaderStats.forEach(function (stat) {\n      _this[stat + '_'] = sumLoaderStat.bind(_assertThisInitialized(_this), stat);\n    });\n    _this.logger_ = logger('MPC');\n    _this.triggeredFmp4Usage = false;\n\n    if (_this.tech_.preload() === 'none') {\n      _this.loadOnPlay_ = function () {\n        _this.loadOnPlay_ = null;\n\n        _this.masterPlaylistLoader_.load();\n      };\n\n      _this.tech_.one('play', _this.loadOnPlay_);\n    } else {\n      _this.masterPlaylistLoader_.load();\n    }\n\n    _this.timeToLoadedData__ = -1;\n    _this.mainAppendsToLoadedData__ = -1;\n    _this.audioAppendsToLoadedData__ = -1;\n    var event = _this.tech_.preload() === 'none' ? 'play' : 'loadstart'; // start the first frame timer on loadstart or play (for preload none)\n\n    _this.tech_.one(event, function () {\n      var timeToLoadedDataStart = Date.now();\n\n      _this.tech_.one('loadeddata', function () {\n        _this.timeToLoadedData__ = Date.now() - timeToLoadedDataStart;\n        _this.mainAppendsToLoadedData__ = _this.mainSegmentLoader_.mediaAppends;\n        _this.audioAppendsToLoadedData__ = _this.audioSegmentLoader_.mediaAppends;\n      });\n    });\n\n    return _this;\n  }\n\n  var _proto = MasterPlaylistController.prototype;\n\n  _proto.mainAppendsToLoadedData_ = function mainAppendsToLoadedData_() {\n    return this.mainAppendsToLoadedData__;\n  };\n\n  _proto.audioAppendsToLoadedData_ = function audioAppendsToLoadedData_() {\n    return this.audioAppendsToLoadedData__;\n  };\n\n  _proto.appendsToLoadedData_ = function appendsToLoadedData_() {\n    var main = this.mainAppendsToLoadedData_();\n    var audio = this.audioAppendsToLoadedData_();\n\n    if (main === -1 || audio === -1) {\n      return -1;\n    }\n\n    return main + audio;\n  };\n\n  _proto.timeToLoadedData_ = function timeToLoadedData_() {\n    return this.timeToLoadedData__;\n  }\n  /**\n   * Run selectPlaylist and switch to the new playlist if we should\n   *\n   * @param {string} [reason=abr] a reason for why the ABR check is made\n   * @private\n   */\n  ;\n\n  _proto.checkABR_ = function checkABR_(reason) {\n    if (reason === void 0) {\n      reason = 'abr';\n    }\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (nextPlaylist && this.shouldSwitchToMedia_(nextPlaylist)) {\n      this.switchMedia_(nextPlaylist, reason);\n    }\n  };\n\n  _proto.switchMedia_ = function switchMedia_(playlist, cause, delay) {\n    var oldMedia = this.media();\n    var oldId = oldMedia && (oldMedia.id || oldMedia.uri);\n    var newId = playlist.id || playlist.uri;\n\n    if (oldId && oldId !== newId) {\n      this.logger_(\"switch media \" + oldId + \" -> \" + newId + \" from \" + cause);\n      this.tech_.trigger({\n        type: 'usage',\n        name: \"vhs-rendition-change-\" + cause\n      });\n    }\n\n    this.masterPlaylistLoader_.media(playlist, delay);\n  }\n  /**\n   * Start a timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.startABRTimer_ = function startABRTimer_() {\n    var _this2 = this;\n\n    this.stopABRTimer_();\n    this.abrTimer_ = window$1.setInterval(function () {\n      return _this2.checkABR_();\n    }, 250);\n  }\n  /**\n   * Stop the timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.stopABRTimer_ = function stopABRTimer_() {\n    // if we're scrubbing, we don't need to pause.\n    // This getter will be added to Video.js in version 7.11.\n    if (this.tech_.scrubbing && this.tech_.scrubbing()) {\n      return;\n    }\n\n    window$1.clearInterval(this.abrTimer_);\n    this.abrTimer_ = null;\n  }\n  /**\n   * Get a list of playlists for the currently selected audio playlist\n   *\n   * @return {Array} the array of audio playlists\n   */\n  ;\n\n  _proto.getAudioTrackPlaylists_ = function getAudioTrackPlaylists_() {\n    var master = this.master();\n    var defaultPlaylists = master && master.playlists || []; // if we don't have any audio groups then we can only\n    // assume that the audio tracks are contained in masters\n    // playlist array, use that or an empty array.\n\n    if (!master || !master.mediaGroups || !master.mediaGroups.AUDIO) {\n      return defaultPlaylists;\n    }\n\n    var AUDIO = master.mediaGroups.AUDIO;\n    var groupKeys = Object.keys(AUDIO);\n    var track; // get the current active track\n\n    if (Object.keys(this.mediaTypes_.AUDIO.groups).length) {\n      track = this.mediaTypes_.AUDIO.activeTrack(); // or get the default track from master if mediaTypes_ isn't setup yet\n    } else {\n      // default group is `main` or just the first group.\n      var defaultGroup = AUDIO.main || groupKeys.length && AUDIO[groupKeys[0]];\n\n      for (var label in defaultGroup) {\n        if (defaultGroup[label].default) {\n          track = {\n            label: label\n          };\n          break;\n        }\n      }\n    } // no active track no playlists.\n\n\n    if (!track) {\n      return defaultPlaylists;\n    }\n\n    var playlists = []; // get all of the playlists that are possible for the\n    // active track.\n\n    for (var group in AUDIO) {\n      if (AUDIO[group][track.label]) {\n        var properties = AUDIO[group][track.label];\n\n        if (properties.playlists && properties.playlists.length) {\n          playlists.push.apply(playlists, properties.playlists);\n        } else if (properties.uri) {\n          playlists.push(properties);\n        } else if (master.playlists.length) {\n          // if an audio group does not have a uri\n          // see if we have main playlists that use it as a group.\n          // if we do then add those to the playlists list.\n          for (var i = 0; i < master.playlists.length; i++) {\n            var playlist = master.playlists[i];\n\n            if (playlist.attributes && playlist.attributes.AUDIO && playlist.attributes.AUDIO === group) {\n              playlists.push(playlist);\n            }\n          }\n        }\n      }\n    }\n\n    if (!playlists.length) {\n      return defaultPlaylists;\n    }\n\n    return playlists;\n  }\n  /**\n   * Register event handlers on the master playlist loader. A helper\n   * function for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupMasterPlaylistLoaderListeners_ = function setupMasterPlaylistLoaderListeners_() {\n    var _this3 = this;\n\n    this.masterPlaylistLoader_.on('loadedmetadata', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      } // if this isn't a live video and preload permits, start\n      // downloading segments\n\n\n      if (media.endList && _this3.tech_.preload() !== 'none') {\n        _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n        _this3.mainSegmentLoader_.load();\n      }\n\n      setupMediaGroups({\n        sourceType: _this3.sourceType_,\n        segmentLoaders: {\n          AUDIO: _this3.audioSegmentLoader_,\n          SUBTITLES: _this3.subtitleSegmentLoader_,\n          main: _this3.mainSegmentLoader_\n        },\n        tech: _this3.tech_,\n        requestOptions: _this3.requestOptions_,\n        masterPlaylistLoader: _this3.masterPlaylistLoader_,\n        vhs: _this3.vhs_,\n        master: _this3.master(),\n        mediaTypes: _this3.mediaTypes_,\n        blacklistCurrentPlaylist: _this3.blacklistCurrentPlaylist.bind(_this3)\n      });\n\n      _this3.triggerPresenceUsage_(_this3.master(), media);\n\n      _this3.setupFirstPlay();\n\n      if (!_this3.mediaTypes_.AUDIO.activePlaylistLoader || _this3.mediaTypes_.AUDIO.activePlaylistLoader.media()) {\n        _this3.trigger('selectedinitialmedia');\n      } else {\n        // We must wait for the active audio playlist loader to\n        // finish setting up before triggering this event so the\n        // representations API and EME setup is correct\n        _this3.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', function () {\n          _this3.trigger('selectedinitialmedia');\n        });\n      }\n    });\n    this.masterPlaylistLoader_.on('loadedplaylist', function () {\n      if (_this3.loadOnPlay_) {\n        _this3.tech_.off('play', _this3.loadOnPlay_);\n      }\n\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media();\n\n      if (!updatedPlaylist) {\n        // exclude any variants that are not supported by the browser before selecting\n        // an initial media as the playlist selectors do not consider browser support\n        _this3.excludeUnsupportedVariants_();\n\n        var selectedMedia;\n\n        if (_this3.enableLowInitialPlaylist) {\n          selectedMedia = _this3.selectInitialPlaylist();\n        }\n\n        if (!selectedMedia) {\n          selectedMedia = _this3.selectPlaylist();\n        }\n\n        if (!selectedMedia || !_this3.shouldSwitchToMedia_(selectedMedia)) {\n          return;\n        }\n\n        _this3.initialMedia_ = selectedMedia;\n\n        _this3.switchMedia_(_this3.initialMedia_, 'initial'); // Under the standard case where a source URL is provided, loadedplaylist will\n        // fire again since the playlist will be requested. In the case of vhs-json\n        // (where the manifest object is provided as the source), when the media\n        // playlist's `segments` list is already available, a media playlist won't be\n        // requested, and loadedplaylist won't fire again, so the playlist handler must be\n        // called on its own here.\n\n\n        var haveJsonSource = _this3.sourceType_ === 'vhs-json' && _this3.initialMedia_.segments;\n\n        if (!haveJsonSource) {\n          return;\n        }\n\n        updatedPlaylist = _this3.initialMedia_;\n      }\n\n      _this3.handleUpdatedMediaPlaylist(updatedPlaylist);\n    });\n    this.masterPlaylistLoader_.on('error', function () {\n      _this3.blacklistCurrentPlaylist(_this3.masterPlaylistLoader_.error);\n    });\n    this.masterPlaylistLoader_.on('mediachanging', function () {\n      _this3.mainSegmentLoader_.abort();\n\n      _this3.mainSegmentLoader_.pause();\n    });\n    this.masterPlaylistLoader_.on('mediachange', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      }\n\n      _this3.masterPlaylistLoader_.load(); // TODO: Create a new event on the PlaylistLoader that signals\n      // that the segments have changed in some way and use that to\n      // update the SegmentLoader instead of doing it twice here and\n      // on `loadedplaylist`\n\n\n      _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n      _this3.mainSegmentLoader_.load();\n\n      _this3.tech_.trigger({\n        type: 'mediachange',\n        bubbles: true\n      });\n    });\n    this.masterPlaylistLoader_.on('playlistunchanged', function () {\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media(); // ignore unchanged playlists that have already been\n      // excluded for not-changing. We likely just have a really slowly updating\n      // playlist.\n\n\n      if (updatedPlaylist.lastExcludeReason_ === 'playlist-unchanged') {\n        return;\n      }\n\n      var playlistOutdated = _this3.stuckAtPlaylistEnd_(updatedPlaylist);\n\n      if (playlistOutdated) {\n        // Playlist has stopped updating and we're stuck at its end. Try to\n        // blacklist it and switch to another playlist in the hope that that\n        // one is updating (and give the player a chance to re-adjust to the\n        // safe live point).\n        _this3.blacklistCurrentPlaylist({\n          message: 'Playlist no longer updating.',\n          reason: 'playlist-unchanged'\n        }); // useful for monitoring QoS\n\n\n        _this3.tech_.trigger('playliststuck');\n      }\n    });\n    this.masterPlaylistLoader_.on('renditiondisabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-disabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-disabled'\n      });\n    });\n    this.masterPlaylistLoader_.on('renditionenabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-enabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-enabled'\n      });\n    });\n  }\n  /**\n   * Given an updated media playlist (whether it was loaded for the first time, or\n   * refreshed for live playlists), update any relevant properties and state to reflect\n   * changes in the media that should be accounted for (e.g., cues and duration).\n   *\n   * @param {Object} updatedPlaylist the updated media playlist object\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleUpdatedMediaPlaylist = function handleUpdatedMediaPlaylist(updatedPlaylist) {\n    if (this.useCueTags_) {\n      this.updateAdCues_(updatedPlaylist);\n    } // TODO: Create a new event on the PlaylistLoader that signals\n    // that the segments have changed in some way and use that to\n    // update the SegmentLoader instead of doing it twice here and\n    // on `mediachange`\n\n\n    this.mainSegmentLoader_.playlist(updatedPlaylist, this.requestOptions_);\n    this.updateDuration(!updatedPlaylist.endList); // If the player isn't paused, ensure that the segment loader is running,\n    // as it is possible that it was temporarily stopped while waiting for\n    // a playlist (e.g., in case the playlist errored and we re-requested it).\n\n    if (!this.tech_.paused()) {\n      this.mainSegmentLoader_.load();\n\n      if (this.audioSegmentLoader_) {\n        this.audioSegmentLoader_.load();\n      }\n    }\n  }\n  /**\n   * A helper function for triggerring presence usage events once per source\n   *\n   * @private\n   */\n  ;\n\n  _proto.triggerPresenceUsage_ = function triggerPresenceUsage_(master, media) {\n    var mediaGroups = master.mediaGroups || {};\n    var defaultDemuxed = true;\n    var audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n\n    for (var mediaGroup in mediaGroups.AUDIO) {\n      for (var label in mediaGroups.AUDIO[mediaGroup]) {\n        var properties = mediaGroups.AUDIO[mediaGroup][label];\n\n        if (!properties.uri) {\n          defaultDemuxed = false;\n        }\n      }\n    }\n\n    if (defaultDemuxed) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-demuxed'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-demuxed'\n      });\n    }\n\n    if (Object.keys(mediaGroups.SUBTITLES).length) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-webvtt'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-webvtt'\n      });\n    }\n\n    if (Vhs$1.Playlist.isAes(media)) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-aes'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-aes'\n      });\n    }\n\n    if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-alternate-audio'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-alternate-audio'\n      });\n    }\n\n    if (this.useCueTags_) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-playlist-cue-tags'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-playlist-cue-tags'\n      });\n    }\n  };\n\n  _proto.shouldSwitchToMedia_ = function shouldSwitchToMedia_(nextPlaylist) {\n    var currentPlaylist = this.masterPlaylistLoader_.media() || this.masterPlaylistLoader_.pendingMedia_;\n    var currentTime = this.tech_.currentTime();\n    var bufferLowWaterLine = this.bufferLowWaterLine();\n    var bufferHighWaterLine = this.bufferHighWaterLine();\n    var buffered = this.tech_.buffered();\n    return shouldSwitchToMedia({\n      buffered: buffered,\n      currentTime: currentTime,\n      currentPlaylist: currentPlaylist,\n      nextPlaylist: nextPlaylist,\n      bufferLowWaterLine: bufferLowWaterLine,\n      bufferHighWaterLine: bufferHighWaterLine,\n      duration: this.duration(),\n      experimentalBufferBasedABR: this.experimentalBufferBasedABR,\n      log: this.logger_\n    });\n  }\n  /**\n   * Register event handlers on the segment loaders. A helper function\n   * for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupSegmentLoaderListeners_ = function setupSegmentLoaderListeners_() {\n    var _this4 = this;\n\n    this.mainSegmentLoader_.on('bandwidthupdate', function () {\n      // Whether or not buffer based ABR or another ABR is used, on a bandwidth change it's\n      // useful to check to see if a rendition switch should be made.\n      _this4.checkABR_('bandwidthupdate');\n\n      _this4.tech_.trigger('bandwidthupdate');\n    });\n    this.mainSegmentLoader_.on('timeout', function () {\n      if (_this4.experimentalBufferBasedABR) {\n        // If a rendition change is needed, then it would've be done on `bandwidthupdate`.\n        // Here the only consideration is that for buffer based ABR there's no guarantee\n        // of an immediate switch (since the bandwidth is averaged with a timeout\n        // bandwidth value of 1), so force a load on the segment loader to keep it going.\n        _this4.mainSegmentLoader_.load();\n      }\n    }); // `progress` events are not reliable enough of a bandwidth measure to trigger buffer\n    // based ABR.\n\n    if (!this.experimentalBufferBasedABR) {\n      this.mainSegmentLoader_.on('progress', function () {\n        _this4.trigger('progress');\n      });\n    }\n\n    this.mainSegmentLoader_.on('error', function () {\n      _this4.blacklistCurrentPlaylist(_this4.mainSegmentLoader_.error());\n    });\n    this.mainSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.mainSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.mainSegmentLoader_.on('timestampoffset', function () {\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-timestamp-offset'\n      });\n\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'hls-timestamp-offset'\n      });\n    });\n    this.audioSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.audioSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.audioSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('ended', function () {\n      _this4.logger_('main segment loader ended');\n\n      _this4.onEndOfStream();\n    });\n    this.mainSegmentLoader_.on('earlyabort', function (event) {\n      // never try to early abort with the new ABR algorithm\n      if (_this4.experimentalBufferBasedABR) {\n        return;\n      }\n\n      _this4.delegateLoaders_('all', ['abort']);\n\n      _this4.blacklistCurrentPlaylist({\n        message: 'Aborted early because there isn\\'t enough bandwidth to complete the ' + 'request without rebuffering.'\n      }, ABORT_EARLY_BLACKLIST_SECONDS);\n    });\n\n    var updateCodecs = function updateCodecs() {\n      if (!_this4.sourceUpdater_.hasCreatedSourceBuffers()) {\n        return _this4.tryToCreateSourceBuffers_();\n      }\n\n      var codecs = _this4.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n\n      if (!codecs) {\n        return;\n      }\n\n      _this4.sourceUpdater_.addOrChangeSourceBuffers(codecs);\n    };\n\n    this.mainSegmentLoader_.on('trackinfo', updateCodecs);\n    this.audioSegmentLoader_.on('trackinfo', updateCodecs);\n    this.mainSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('ended', function () {\n      _this4.logger_('audioSegmentLoader ended');\n\n      _this4.onEndOfStream();\n    });\n  };\n\n  _proto.mediaSecondsLoaded_ = function mediaSecondsLoaded_() {\n    return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n  }\n  /**\n   * Call load on our SegmentLoaders\n   */\n  ;\n\n  _proto.load = function load() {\n    this.mainSegmentLoader_.load();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.load();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.load();\n    }\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions without performing destructive actions, like\n   * removing already buffered content\n   *\n   * @private\n   * @deprecated\n   */\n  ;\n\n  _proto.smoothQualityChange_ = function smoothQualityChange_(media) {\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    this.fastQualityChange_(media);\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions. This method will perform destructive actions like removing\n   * already buffered content in order to readjust the currently active\n   * playlist quickly. This is good for manual quality changes\n   *\n   * @private\n   */\n  ;\n\n  _proto.fastQualityChange_ = function fastQualityChange_(media) {\n    var _this5 = this;\n\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    if (media === this.masterPlaylistLoader_.media()) {\n      this.logger_('skipping fastQualityChange because new media is same as old');\n      return;\n    }\n\n    this.switchMedia_(media, 'fast-quality'); // Delete all buffered data to allow an immediate quality switch, then seek to give\n    // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds\n    // ahead is roughly the minimum that will accomplish this across a variety of content\n    // in IE and Edge, but seeking in place is sufficient on all other browsers)\n    // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/\n    // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904\n\n    this.mainSegmentLoader_.resetEverything(function () {\n      // Since this is not a typical seek, we avoid the seekTo method which can cause segments\n      // from the previously enabled rendition to load before the new playlist has finished loading\n      if (videojs.browser.IE_VERSION || videojs.browser.IS_EDGE) {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime() + 0.04);\n      } else {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime());\n      }\n    }); // don't need to reset audio as it is reset when media changes\n  }\n  /**\n   * Begin playback.\n   */\n  ;\n\n  _proto.play = function play() {\n    if (this.setupFirstPlay()) {\n      return;\n    }\n\n    if (this.tech_.ended()) {\n      this.tech_.setCurrentTime(0);\n    }\n\n    if (this.hasPlayed_) {\n      this.load();\n    }\n\n    var seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,\n    // seek forward to the live point\n\n    if (this.tech_.duration() === Infinity) {\n      if (this.tech_.currentTime() < seekable.start(0)) {\n        return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));\n      }\n    }\n  }\n  /**\n   * Seek to the latest media position if this is a live video and the\n   * player and video are loaded and initialized.\n   */\n  ;\n\n  _proto.setupFirstPlay = function setupFirstPlay() {\n    var _this6 = this;\n\n    var media = this.masterPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play\n    //  If 1) there is no active media\n    //     2) the player is paused\n    //     3) the first play has already been setup\n    // then exit early\n\n    if (!media || this.tech_.paused() || this.hasPlayed_) {\n      return false;\n    } // when the video is a live stream\n\n\n    if (!media.endList) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        // without a seekable range, the player cannot seek to begin buffering at the live\n        // point\n        return false;\n      }\n\n      if (videojs.browser.IE_VERSION && this.tech_.readyState() === 0) {\n        // IE11 throws an InvalidStateError if you try to set currentTime while the\n        // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n        this.tech_.one('loadedmetadata', function () {\n          _this6.trigger('firstplay');\n\n          _this6.tech_.setCurrentTime(seekable.end(0));\n\n          _this6.hasPlayed_ = true;\n        });\n        return false;\n      } // trigger firstplay to inform the source handler to ignore the next seek event\n\n\n      this.trigger('firstplay'); // seek to the live point\n\n      this.tech_.setCurrentTime(seekable.end(0));\n    }\n\n    this.hasPlayed_ = true; // we can begin loading now that everything is ready\n\n    this.load();\n    return true;\n  }\n  /**\n   * handle the sourceopen event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceOpen_ = function handleSourceOpen_() {\n    // Only attempt to create the source buffer if none already exist.\n    // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n    // after `endOfStream` has been called (in response to a seek for instance)\n    this.tryToCreateSourceBuffers_(); // if autoplay is enabled, begin playback. This is duplicative of\n    // code in video.js but is required because play() must be invoked\n    // *after* the media source has opened.\n\n    if (this.tech_.autoplay()) {\n      var playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request\n      // on browsers which return a promise\n\n      if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n        playPromise.then(null, function (e) {});\n      }\n    }\n\n    this.trigger('sourceopen');\n  }\n  /**\n   * handle the sourceended event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceEnded_ = function handleSourceEnded_() {\n    if (!this.inbandTextTracks_.metadataTrack_) {\n      return;\n    }\n\n    var cues = this.inbandTextTracks_.metadataTrack_.cues;\n\n    if (!cues || !cues.length) {\n      return;\n    }\n\n    var duration = this.duration();\n    cues[cues.length - 1].endTime = isNaN(duration) || Math.abs(duration) === Infinity ? Number.MAX_VALUE : duration;\n  }\n  /**\n   * handle the durationchange event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleDurationChange_ = function handleDurationChange_() {\n    this.tech_.trigger('durationchange');\n  }\n  /**\n   * Calls endOfStream on the media source when all active stream types have called\n   * endOfStream\n   *\n   * @param {string} streamType\n   *        Stream type of the segment loader that called endOfStream\n   * @private\n   */\n  ;\n\n  _proto.onEndOfStream = function onEndOfStream() {\n    var isEndOfStream = this.mainSegmentLoader_.ended_;\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      var mainMediaInfo = this.mainSegmentLoader_.getCurrentMediaInfo_(); // if the audio playlist loader exists, then alternate audio is active\n\n      if (!mainMediaInfo || mainMediaInfo.hasVideo) {\n        // if we do not know if the main segment loader contains video yet or if we\n        // definitively know the main segment loader contains video, then we need to wait\n        // for both main and audio segment loaders to call endOfStream\n        isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n      } else {\n        // otherwise just rely on the audio loader\n        isEndOfStream = this.audioSegmentLoader_.ended_;\n      }\n    }\n\n    if (!isEndOfStream) {\n      return;\n    }\n\n    this.stopABRTimer_();\n    this.sourceUpdater_.endOfStream();\n  }\n  /**\n   * Check if a playlist has stopped being updated\n   *\n   * @param {Object} playlist the media playlist object\n   * @return {boolean} whether the playlist has stopped being updated or not\n   */\n  ;\n\n  _proto.stuckAtPlaylistEnd_ = function stuckAtPlaylistEnd_(playlist) {\n    var seekable = this.seekable();\n\n    if (!seekable.length) {\n      // playlist doesn't have enough information to determine whether we are stuck\n      return false;\n    }\n\n    var expired = this.syncController_.getExpiredTime(playlist, this.duration());\n\n    if (expired === null) {\n      return false;\n    } // does not use the safe live end to calculate playlist end, since we\n    // don't want to say we are stuck while there is still content\n\n\n    var absolutePlaylistEnd = Vhs$1.Playlist.playlistEnd(playlist, expired);\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (!buffered.length) {\n      // return true if the playhead reached the absolute end of the playlist\n      return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;\n    }\n\n    var bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute\n    // end of playlist\n\n    return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;\n  }\n  /**\n   * Blacklists a playlist when an error occurs for a set amount of time\n   * making it unavailable for selection by the rendition selection algorithm\n   * and then forces a new playlist (rendition) selection.\n   *\n   * @param {Object=} error an optional error that may include the playlist\n   * to blacklist\n   * @param {number=} blacklistDuration an optional number of seconds to blacklist the\n   * playlist\n   */\n  ;\n\n  _proto.blacklistCurrentPlaylist = function blacklistCurrentPlaylist(error, blacklistDuration) {\n    if (error === void 0) {\n      error = {};\n    }\n\n    // If the `error` was generated by the playlist loader, it will contain\n    // the playlist we were trying to load (but failed) and that should be\n    // blacklisted instead of the currently selected playlist which is likely\n    // out-of-date in this scenario\n    var currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();\n    blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration; // If there is no current playlist, then an error occurred while we were\n    // trying to load the master OR while we were disposing of the tech\n\n    if (!currentPlaylist) {\n      this.error = error;\n\n      if (this.mediaSource.readyState !== 'open') {\n        this.trigger('error');\n      } else {\n        this.sourceUpdater_.endOfStream('network');\n      }\n\n      return;\n    }\n\n    currentPlaylist.playlistErrors_++;\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var enabledPlaylists = playlists.filter(isEnabled);\n    var isFinalRendition = enabledPlaylists.length === 1 && enabledPlaylists[0] === currentPlaylist; // Don't blacklist the only playlist unless it was blacklisted\n    // forever\n\n    if (playlists.length === 1 && blacklistDuration !== Infinity) {\n      videojs.log.warn(\"Problem encountered with playlist \" + currentPlaylist.id + \". \" + 'Trying again since it is the only playlist.');\n      this.tech_.trigger('retryplaylist'); // if this is a final rendition, we should delay\n\n      return this.masterPlaylistLoader_.load(isFinalRendition);\n    }\n\n    if (isFinalRendition) {\n      // Since we're on the final non-blacklisted playlist, and we're about to blacklist\n      // it, instead of erring the player or retrying this playlist, clear out the current\n      // blacklist. This allows other playlists to be attempted in case any have been\n      // fixed.\n      var reincluded = false;\n      playlists.forEach(function (playlist) {\n        // skip current playlist which is about to be blacklisted\n        if (playlist === currentPlaylist) {\n          return;\n        }\n\n        var excludeUntil = playlist.excludeUntil; // a playlist cannot be reincluded if it wasn't excluded to begin with.\n\n        if (typeof excludeUntil !== 'undefined' && excludeUntil !== Infinity) {\n          reincluded = true;\n          delete playlist.excludeUntil;\n        }\n      });\n\n      if (reincluded) {\n        videojs.log.warn('Removing other playlists from the exclusion list because the last ' + 'rendition is about to be excluded.'); // Technically we are retrying a playlist, in that we are simply retrying a previous\n        // playlist. This is needed for users relying on the retryplaylist event to catch a\n        // case where the player might be stuck and looping through \"dead\" playlists.\n\n        this.tech_.trigger('retryplaylist');\n      }\n    } // Blacklist this playlist\n\n\n    var excludeUntil;\n\n    if (currentPlaylist.playlistErrors_ > this.maxPlaylistRetries) {\n      excludeUntil = Infinity;\n    } else {\n      excludeUntil = Date.now() + blacklistDuration * 1000;\n    }\n\n    currentPlaylist.excludeUntil = excludeUntil;\n\n    if (error.reason) {\n      currentPlaylist.lastExcludeReason_ = error.reason;\n    }\n\n    this.tech_.trigger('blacklistplaylist');\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-rendition-blacklisted'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-rendition-blacklisted'\n    }); // TODO: should we select a new playlist if this blacklist wasn't for the currentPlaylist?\n    // Would be something like media().id !=== currentPlaylist.id and we  would need something\n    // like `pendingMedia` in playlist loaders to check against that too. This will prevent us\n    // from loading a new playlist on any blacklist.\n    // Select a new playlist\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (!nextPlaylist) {\n      this.error = 'Playback cannot continue. No available working or supported playlists.';\n      this.trigger('error');\n      return;\n    }\n\n    var logFn = error.internal ? this.logger_ : videojs.log.warn;\n    var errorMessage = error.message ? ' ' + error.message : '';\n    logFn((error.internal ? 'Internal problem' : 'Problem') + \" encountered with playlist \" + currentPlaylist.id + \".\" + (errorMessage + \" Switching to playlist \" + nextPlaylist.id + \".\")); // if audio group changed reset audio loaders\n\n    if (nextPlaylist.attributes.AUDIO !== currentPlaylist.attributes.AUDIO) {\n      this.delegateLoaders_('audio', ['abort', 'pause']);\n    } // if subtitle group changed reset subtitle loaders\n\n\n    if (nextPlaylist.attributes.SUBTITLES !== currentPlaylist.attributes.SUBTITLES) {\n      this.delegateLoaders_('subtitle', ['abort', 'pause']);\n    }\n\n    this.delegateLoaders_('main', ['abort', 'pause']);\n    var delayDuration = nextPlaylist.targetDuration / 2 * 1000 || 5 * 1000;\n    var shouldDelay = typeof nextPlaylist.lastRequest === 'number' && Date.now() - nextPlaylist.lastRequest <= delayDuration; // delay if it's a final rendition or if the last refresh is sooner than half targetDuration\n\n    return this.switchMedia_(nextPlaylist, 'exclude', isFinalRendition || shouldDelay);\n  }\n  /**\n   * Pause all segment/playlist loaders\n   */\n  ;\n\n  _proto.pauseLoading = function pauseLoading() {\n    this.delegateLoaders_('all', ['abort', 'pause']);\n    this.stopABRTimer_();\n  }\n  /**\n   * Call a set of functions in order on playlist loaders, segment loaders,\n   * or both types of loaders.\n   *\n   * @param {string} filter\n   *        Filter loaders that should call fnNames using a string. Can be:\n   *        * all - run on all loaders\n   *        * audio - run on all audio loaders\n   *        * subtitle - run on all subtitle loaders\n   *        * main - run on the main/master loaders\n   *\n   * @param {Array|string} fnNames\n   *        A string or array of function names to call.\n   */\n  ;\n\n  _proto.delegateLoaders_ = function delegateLoaders_(filter, fnNames) {\n    var _this7 = this;\n\n    var loaders = [];\n    var dontFilterPlaylist = filter === 'all';\n\n    if (dontFilterPlaylist || filter === 'main') {\n      loaders.push(this.masterPlaylistLoader_);\n    }\n\n    var mediaTypes = [];\n\n    if (dontFilterPlaylist || filter === 'audio') {\n      mediaTypes.push('AUDIO');\n    }\n\n    if (dontFilterPlaylist || filter === 'subtitle') {\n      mediaTypes.push('CLOSED-CAPTIONS');\n      mediaTypes.push('SUBTITLES');\n    }\n\n    mediaTypes.forEach(function (mediaType) {\n      var loader = _this7.mediaTypes_[mediaType] && _this7.mediaTypes_[mediaType].activePlaylistLoader;\n\n      if (loader) {\n        loaders.push(loader);\n      }\n    });\n    ['main', 'audio', 'subtitle'].forEach(function (name) {\n      var loader = _this7[name + \"SegmentLoader_\"];\n\n      if (loader && (filter === name || filter === 'all')) {\n        loaders.push(loader);\n      }\n    });\n    loaders.forEach(function (loader) {\n      return fnNames.forEach(function (fnName) {\n        if (typeof loader[fnName] === 'function') {\n          loader[fnName]();\n        }\n      });\n    });\n  }\n  /**\n   * set the current time on all segment loaders\n   *\n   * @param {TimeRange} currentTime the current time to set\n   * @return {TimeRange} the current time\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    var buffered = findRange(this.tech_.buffered(), currentTime);\n\n    if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {\n      // return immediately if the metadata is not ready yet\n      return 0;\n    } // it's clearly an edge-case but don't thrown an error if asked to\n    // seek within an empty playlist\n\n\n    if (!this.masterPlaylistLoader_.media().segments) {\n      return 0;\n    } // if the seek location is already buffered, continue buffering as usual\n\n\n    if (buffered && buffered.length) {\n      return currentTime;\n    } // cancel outstanding requests so we begin buffering at the new\n    // location\n\n\n    this.mainSegmentLoader_.resetEverything();\n    this.mainSegmentLoader_.abort();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.resetEverything();\n      this.audioSegmentLoader_.abort();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.resetEverything();\n      this.subtitleSegmentLoader_.abort();\n    } // start segment loader loading in case they are paused\n\n\n    this.load();\n  }\n  /**\n   * get the current duration\n   *\n   * @return {TimeRange} the duration\n   */\n  ;\n\n  _proto.duration = function duration() {\n    if (!this.masterPlaylistLoader_) {\n      return 0;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      // no playlists loaded yet, so can't determine a duration\n      return 0;\n    } // Don't rely on the media source for duration in the case of a live playlist since\n    // setting the native MediaSource's duration to infinity ends up with consequences to\n    // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n    //\n    // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n    // however, few browsers have support for setLiveSeekableRange()\n    // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n    //\n    // Until a time when the duration of the media source can be set to infinity, and a\n    // seekable range specified across browsers, just return Infinity.\n\n\n    if (!media.endList) {\n      return Infinity;\n    } // Since this is a VOD video, it is safe to rely on the media source's duration (if\n    // available). If it's not available, fall back to a playlist-calculated estimate.\n\n\n    if (this.mediaSource) {\n      return this.mediaSource.duration;\n    }\n\n    return Vhs$1.Playlist.duration(media);\n  }\n  /**\n   * check the seekable range\n   *\n   * @return {TimeRange} the seekable range\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.seekable_;\n  };\n\n  _proto.onSyncInfoUpdate_ = function onSyncInfoUpdate_() {\n    var audioSeekable; // TODO check for creation of both source buffers before updating seekable\n    //\n    // A fix was made to this function where a check for\n    // this.sourceUpdater_.hasCreatedSourceBuffers\n    // was added to ensure that both source buffers were created before seekable was\n    // updated. However, it originally had a bug where it was checking for a true and\n    // returning early instead of checking for false. Setting it to check for false to\n    // return early though created other issues. A call to play() would check for seekable\n    // end without verifying that a seekable range was present. In addition, even checking\n    // for that didn't solve some issues, as handleFirstPlay is sometimes worked around\n    // due to a media update calling load on the segment loaders, skipping a seek to live,\n    // thereby starting live streams at the beginning of the stream rather than at the end.\n    //\n    // This conditional should be fixed to wait for the creation of two source buffers at\n    // the same time as the other sections of code are fixed to properly seek to live and\n    // not throw an error due to checking for a seekable end when no seekable range exists.\n    //\n    // For now, fall back to the older behavior, with the understanding that the seekable\n    // range may not be completely correct, leading to a suboptimal initial live point.\n\n    if (!this.masterPlaylistLoader_) {\n      return;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      return;\n    }\n\n    var expired = this.syncController_.getExpiredTime(media, this.duration());\n\n    if (expired === null) {\n      // not enough information to update seekable\n      return;\n    }\n\n    var master = this.masterPlaylistLoader_.master;\n    var mainSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n    if (mainSeekable.length === 0) {\n      return;\n    }\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n      expired = this.syncController_.getExpiredTime(media, this.duration());\n\n      if (expired === null) {\n        return;\n      }\n\n      audioSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n      if (audioSeekable.length === 0) {\n        return;\n      }\n    }\n\n    var oldEnd;\n    var oldStart;\n\n    if (this.seekable_ && this.seekable_.length) {\n      oldEnd = this.seekable_.end(0);\n      oldStart = this.seekable_.start(0);\n    }\n\n    if (!audioSeekable) {\n      // seekable has been calculated based on buffering video data so it\n      // can be returned directly\n      this.seekable_ = mainSeekable;\n    } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n      // seekables are pretty far off, rely on main\n      this.seekable_ = mainSeekable;\n    } else {\n      this.seekable_ = videojs.createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n    } // seekable is the same as last time\n\n\n    if (this.seekable_ && this.seekable_.length) {\n      if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {\n        return;\n      }\n    }\n\n    this.logger_(\"seekable updated [\" + printableRange(this.seekable_) + \"]\");\n    this.tech_.trigger('seekablechanged');\n  }\n  /**\n   * Update the player duration\n   */\n  ;\n\n  _proto.updateDuration = function updateDuration(isLive) {\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n      this.updateDuration_ = null;\n    }\n\n    if (this.mediaSource.readyState !== 'open') {\n      this.updateDuration_ = this.updateDuration.bind(this, isLive);\n      this.mediaSource.addEventListener('sourceopen', this.updateDuration_);\n      return;\n    }\n\n    if (isLive) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        return;\n      } // Even in the case of a live playlist, the native MediaSource's duration should not\n      // be set to Infinity (even though this would be expected for a live playlist), since\n      // setting the native MediaSource's duration to infinity ends up with consequences to\n      // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n      //\n      // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n      // however, few browsers have support for setLiveSeekableRange()\n      // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n      //\n      // Until a time when the duration of the media source can be set to infinity, and a\n      // seekable range specified across browsers, the duration should be greater than or\n      // equal to the last possible seekable value.\n      // MediaSource duration starts as NaN\n      // It is possible (and probable) that this case will never be reached for many\n      // sources, since the MediaSource reports duration as the highest value without\n      // accounting for timestamp offset. For example, if the timestamp offset is -100 and\n      // we buffered times 0 to 100 with real times of 100 to 200, even though current\n      // time will be between 0 and 100, the native media source may report the duration\n      // as 200. However, since we report duration separate from the media source (as\n      // Infinity), and as long as the native media source duration value is greater than\n      // our reported seekable range, seeks will work as expected. The large number as\n      // duration for live is actually a strategy used by some players to work around the\n      // issue of live seekable ranges cited above.\n\n\n      if (isNaN(this.mediaSource.duration) || this.mediaSource.duration < seekable.end(seekable.length - 1)) {\n        this.sourceUpdater_.setDuration(seekable.end(seekable.length - 1));\n      }\n\n      return;\n    }\n\n    var buffered = this.tech_.buffered();\n    var duration = Vhs$1.Playlist.duration(this.masterPlaylistLoader_.media());\n\n    if (buffered.length > 0) {\n      duration = Math.max(duration, buffered.end(buffered.length - 1));\n    }\n\n    if (this.mediaSource.duration !== duration) {\n      this.sourceUpdater_.setDuration(duration);\n    }\n  }\n  /**\n   * dispose of the MasterPlaylistController and everything\n   * that it controls\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this8 = this;\n\n    this.trigger('dispose');\n    this.decrypter_.terminate();\n    this.masterPlaylistLoader_.dispose();\n    this.mainSegmentLoader_.dispose();\n\n    if (this.loadOnPlay_) {\n      this.tech_.off('play', this.loadOnPlay_);\n    }\n\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      var groups = _this8.mediaTypes_[type].groups;\n\n      for (var id in groups) {\n        groups[id].forEach(function (group) {\n          if (group.playlistLoader) {\n            group.playlistLoader.dispose();\n          }\n        });\n      }\n    });\n    this.audioSegmentLoader_.dispose();\n    this.subtitleSegmentLoader_.dispose();\n    this.sourceUpdater_.dispose();\n    this.timelineChangeController_.dispose();\n    this.stopABRTimer_();\n\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n    }\n\n    this.mediaSource.removeEventListener('durationchange', this.handleDurationChange_); // load the media source into the player\n\n    this.mediaSource.removeEventListener('sourceopen', this.handleSourceOpen_);\n    this.mediaSource.removeEventListener('sourceended', this.handleSourceEnded_);\n    this.off();\n  }\n  /**\n   * return the master playlist object if we have one\n   *\n   * @return {Object} the master playlist object that we parsed\n   */\n  ;\n\n  _proto.master = function master() {\n    return this.masterPlaylistLoader_.master;\n  }\n  /**\n   * return the currently selected playlist\n   *\n   * @return {Object} the currently selected playlist object that we parsed\n   */\n  ;\n\n  _proto.media = function media() {\n    // playlist loader will not return media if it has not been fully loaded\n    return this.masterPlaylistLoader_.media() || this.initialMedia_;\n  };\n\n  _proto.areMediaTypesKnown_ = function areMediaTypesKnown_() {\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n    var hasMainMediaInfo = !!this.mainSegmentLoader_.getCurrentMediaInfo_(); // if we are not using an audio loader, then we have audio media info\n    // otherwise check on the segment loader.\n\n    var hasAudioMediaInfo = !usingAudioLoader ? true : !!this.audioSegmentLoader_.getCurrentMediaInfo_(); // one or both loaders has not loaded sufficently to get codecs\n\n    if (!hasMainMediaInfo || !hasAudioMediaInfo) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCodecsOrExclude_ = function getCodecsOrExclude_() {\n    var _this9 = this;\n\n    var media = {\n      main: this.mainSegmentLoader_.getCurrentMediaInfo_() || {},\n      audio: this.audioSegmentLoader_.getCurrentMediaInfo_() || {}\n    };\n    var playlist = this.mainSegmentLoader_.getPendingSegmentPlaylist() || this.media(); // set \"main\" media equal to video\n\n    media.video = media.main;\n    var playlistCodecs = codecsForPlaylist(this.master(), playlist);\n    var codecs = {};\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n\n    if (media.main.hasVideo) {\n      codecs.video = playlistCodecs.video || media.main.videoCodec || DEFAULT_VIDEO_CODEC;\n    }\n\n    if (media.main.isMuxed) {\n      codecs.video += \",\" + (playlistCodecs.audio || media.main.audioCodec || DEFAULT_AUDIO_CODEC);\n    }\n\n    if (media.main.hasAudio && !media.main.isMuxed || media.audio.hasAudio || usingAudioLoader) {\n      codecs.audio = playlistCodecs.audio || media.main.audioCodec || media.audio.audioCodec || DEFAULT_AUDIO_CODEC; // set audio isFmp4 so we use the correct \"supports\" function below\n\n      media.audio.isFmp4 = media.main.hasAudio && !media.main.isMuxed ? media.main.isFmp4 : media.audio.isFmp4;\n    } // no codecs, no playback.\n\n\n    if (!codecs.audio && !codecs.video) {\n      this.blacklistCurrentPlaylist({\n        playlist: playlist,\n        message: 'Could not determine codecs for playlist.',\n        blacklistDuration: Infinity\n      });\n      return;\n    } // fmp4 relies on browser support, while ts relies on muxer support\n\n\n    var supportFunction = function supportFunction(isFmp4, codec) {\n      return isFmp4 ? browserSupportsCodec(codec) : muxerSupportsCodec(codec);\n    };\n\n    var unsupportedCodecs = {};\n    var unsupportedAudio;\n    ['video', 'audio'].forEach(function (type) {\n      if (codecs.hasOwnProperty(type) && !supportFunction(media[type].isFmp4, codecs[type])) {\n        var supporter = media[type].isFmp4 ? 'browser' : 'muxer';\n        unsupportedCodecs[supporter] = unsupportedCodecs[supporter] || [];\n        unsupportedCodecs[supporter].push(codecs[type]);\n\n        if (type === 'audio') {\n          unsupportedAudio = supporter;\n        }\n      }\n    });\n\n    if (usingAudioLoader && unsupportedAudio && playlist.attributes.AUDIO) {\n      var audioGroup = playlist.attributes.AUDIO;\n      this.master().playlists.forEach(function (variant) {\n        var variantAudioGroup = variant.attributes && variant.attributes.AUDIO;\n\n        if (variantAudioGroup === audioGroup && variant !== playlist) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n      this.logger_(\"excluding audio group \" + audioGroup + \" as \" + unsupportedAudio + \" does not support codec(s): \\\"\" + codecs.audio + \"\\\"\");\n    } // if we have any unsupported codecs blacklist this playlist.\n\n\n    if (Object.keys(unsupportedCodecs).length) {\n      var message = Object.keys(unsupportedCodecs).reduce(function (acc, supporter) {\n        if (acc) {\n          acc += ', ';\n        }\n\n        acc += supporter + \" does not support codec(s): \\\"\" + unsupportedCodecs[supporter].join(',') + \"\\\"\";\n        return acc;\n      }, '') + '.';\n      this.blacklistCurrentPlaylist({\n        playlist: playlist,\n        internal: true,\n        message: message,\n        blacklistDuration: Infinity\n      });\n      return;\n    } // check if codec switching is happening\n\n\n    if (this.sourceUpdater_.hasCreatedSourceBuffers() && !this.sourceUpdater_.canChangeType()) {\n      var switchMessages = [];\n      ['video', 'audio'].forEach(function (type) {\n        var newCodec = (parseCodecs(_this9.sourceUpdater_.codecs[type] || '')[0] || {}).type;\n        var oldCodec = (parseCodecs(codecs[type] || '')[0] || {}).type;\n\n        if (newCodec && oldCodec && newCodec.toLowerCase() !== oldCodec.toLowerCase()) {\n          switchMessages.push(\"\\\"\" + _this9.sourceUpdater_.codecs[type] + \"\\\" -> \\\"\" + codecs[type] + \"\\\"\");\n        }\n      });\n\n      if (switchMessages.length) {\n        this.blacklistCurrentPlaylist({\n          playlist: playlist,\n          message: \"Codec switching not supported: \" + switchMessages.join(', ') + \".\",\n          blacklistDuration: Infinity,\n          internal: true\n        });\n        return;\n      }\n    } // TODO: when using the muxer shouldn't we just return\n    // the codecs that the muxer outputs?\n\n\n    return codecs;\n  }\n  /**\n   * Create source buffers and exlude any incompatible renditions.\n   *\n   * @private\n   */\n  ;\n\n  _proto.tryToCreateSourceBuffers_ = function tryToCreateSourceBuffers_() {\n    // media source is not ready yet or sourceBuffers are already\n    // created.\n    if (this.mediaSource.readyState !== 'open' || this.sourceUpdater_.hasCreatedSourceBuffers()) {\n      return;\n    }\n\n    if (!this.areMediaTypesKnown_()) {\n      return;\n    }\n\n    var codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n    if (!codecs) {\n      return;\n    }\n\n    this.sourceUpdater_.createSourceBuffers(codecs);\n    var codecString = [codecs.video, codecs.audio].filter(Boolean).join(',');\n    this.excludeIncompatibleVariants_(codecString);\n  }\n  /**\n   * Excludes playlists with codecs that are unsupported by the muxer and browser.\n   */\n  ;\n\n  _proto.excludeUnsupportedVariants_ = function excludeUnsupportedVariants_() {\n    var _this10 = this;\n\n    var playlists = this.master().playlists;\n    var ids = []; // TODO: why don't we have a property to loop through all\n    // playlist? Why did we ever mix indexes and keys?\n\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n\n      if (ids.indexOf(variant.id) !== -1) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var codecs = codecsForPlaylist(_this10.master, variant);\n      var unsupported = [];\n\n      if (codecs.audio && !muxerSupportsCodec(codecs.audio) && !browserSupportsCodec(codecs.audio)) {\n        unsupported.push(\"audio codec \" + codecs.audio);\n      }\n\n      if (codecs.video && !muxerSupportsCodec(codecs.video) && !browserSupportsCodec(codecs.video)) {\n        unsupported.push(\"video codec \" + codecs.video);\n      }\n\n      if (codecs.text && codecs.text === 'stpp.ttml.im1t') {\n        unsupported.push(\"text codec \" + codecs.text);\n      }\n\n      if (unsupported.length) {\n        variant.excludeUntil = Infinity;\n\n        _this10.logger_(\"excluding \" + variant.id + \" for unsupported: \" + unsupported.join(', '));\n      }\n    });\n  }\n  /**\n   * Blacklist playlists that are known to be codec or\n   * stream-incompatible with the SourceBuffer configuration. For\n   * instance, Media Source Extensions would cause the video element to\n   * stall waiting for video data if you switched from a variant with\n   * video and audio to an audio-only one.\n   *\n   * @param {Object} media a media playlist compatible with the current\n   * set of SourceBuffers. Variants in the current master playlist that\n   * do not appear to have compatible codec or stream configurations\n   * will be excluded from the default playlist selection algorithm\n   * indefinitely.\n   * @private\n   */\n  ;\n\n  _proto.excludeIncompatibleVariants_ = function excludeIncompatibleVariants_(codecString) {\n    var _this11 = this;\n\n    var ids = [];\n    var playlists = this.master().playlists;\n    var codecs = unwrapCodecList(parseCodecs(codecString));\n    var codecCount_ = codecCount(codecs);\n    var videoDetails = codecs.video && parseCodecs(codecs.video)[0] || null;\n    var audioDetails = codecs.audio && parseCodecs(codecs.audio)[0] || null;\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n      // or it if it is already excluded forever.\n\n      if (ids.indexOf(variant.id) !== -1 || variant.excludeUntil === Infinity) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var blacklistReasons = []; // get codecs from the playlist for this variant\n\n      var variantCodecs = codecsForPlaylist(_this11.masterPlaylistLoader_.master, variant);\n      var variantCodecCount = codecCount(variantCodecs); // if no codecs are listed, we cannot determine that this\n      // variant is incompatible. Wait for mux.js to probe\n\n      if (!variantCodecs.audio && !variantCodecs.video) {\n        return;\n      } // TODO: we can support this by removing the\n      // old media source and creating a new one, but it will take some work.\n      // The number of streams cannot change\n\n\n      if (variantCodecCount !== codecCount_) {\n        blacklistReasons.push(\"codec count \\\"\" + variantCodecCount + \"\\\" !== \\\"\" + codecCount_ + \"\\\"\");\n      } // only exclude playlists by codec change, if codecs cannot switch\n      // during playback.\n\n\n      if (!_this11.sourceUpdater_.canChangeType()) {\n        var variantVideoDetails = variantCodecs.video && parseCodecs(variantCodecs.video)[0] || null;\n        var variantAudioDetails = variantCodecs.audio && parseCodecs(variantCodecs.audio)[0] || null; // the video codec cannot change\n\n        if (variantVideoDetails && videoDetails && variantVideoDetails.type.toLowerCase() !== videoDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"video codec \\\"\" + variantVideoDetails.type + \"\\\" !== \\\"\" + videoDetails.type + \"\\\"\");\n        } // the audio codec cannot change\n\n\n        if (variantAudioDetails && audioDetails && variantAudioDetails.type.toLowerCase() !== audioDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"audio codec \\\"\" + variantAudioDetails.type + \"\\\" !== \\\"\" + audioDetails.type + \"\\\"\");\n        }\n      }\n\n      if (blacklistReasons.length) {\n        variant.excludeUntil = Infinity;\n\n        _this11.logger_(\"blacklisting \" + variant.id + \": \" + blacklistReasons.join(' && '));\n      }\n    });\n  };\n\n  _proto.updateAdCues_ = function updateAdCues_(media) {\n    var offset = 0;\n    var seekable = this.seekable();\n\n    if (seekable.length) {\n      offset = seekable.start(0);\n    }\n\n    updateAdCues(media, this.cueTagsTrack_, offset);\n  }\n  /**\n   * Calculates the desired forward buffer length based on current time\n   *\n   * @return {number} Desired forward buffer length in seconds\n   */\n  ;\n\n  _proto.goalBufferLength = function goalBufferLength() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.GOAL_BUFFER_LENGTH;\n    var rate = Config.GOAL_BUFFER_LENGTH_RATE;\n    var max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);\n    return Math.min(initial + currentTime * rate, max);\n  }\n  /**\n   * Calculates the desired buffer low water line based on current time\n   *\n   * @return {number} Desired buffer low water line in seconds\n   */\n  ;\n\n  _proto.bufferLowWaterLine = function bufferLowWaterLine() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.BUFFER_LOW_WATER_LINE;\n    var rate = Config.BUFFER_LOW_WATER_LINE_RATE;\n    var max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);\n    var newMax = Math.max(initial, Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);\n    return Math.min(initial + currentTime * rate, this.experimentalBufferBasedABR ? newMax : max);\n  };\n\n  _proto.bufferHighWaterLine = function bufferHighWaterLine() {\n    return Config.BUFFER_HIGH_WATER_LINE;\n  };\n\n  return MasterPlaylistController;\n}(videojs.EventTarget);\n\n/**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The master playlist loader\n * @param {string} playlistID - id of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\n\nvar enableFunction = function enableFunction(loader, playlistID, changePlaylistFn) {\n  return function (enable) {\n    var playlist = loader.master.playlists[playlistID];\n    var incompatible = isIncompatible(playlist);\n    var currentlyEnabled = isEnabled(playlist);\n\n    if (typeof enable === 'undefined') {\n      return currentlyEnabled;\n    }\n\n    if (enable) {\n      delete playlist.disabled;\n    } else {\n      playlist.disabled = true;\n    }\n\n    if (enable !== currentlyEnabled && !incompatible) {\n      // Ensure the outside world knows about our changes\n      changePlaylistFn();\n\n      if (enable) {\n        loader.trigger('renditionenabled');\n      } else {\n        loader.trigger('renditiondisabled');\n      }\n    }\n\n    return enable;\n  };\n};\n/**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\n\nvar Representation = function Representation(vhsHandler, playlist, id) {\n  var mpc = vhsHandler.masterPlaylistController_,\n      smoothQualityChange = vhsHandler.options_.smoothQualityChange; // Get a reference to a bound version of the quality change function\n\n  var changeType = smoothQualityChange ? 'smooth' : 'fast';\n  var qualityChangeFunction = mpc[changeType + \"QualityChange_\"].bind(mpc); // some playlist attributes are optional\n\n  if (playlist.attributes) {\n    var resolution = playlist.attributes.RESOLUTION;\n    this.width = resolution && resolution.width;\n    this.height = resolution && resolution.height;\n    this.bandwidth = playlist.attributes.BANDWIDTH;\n    this.frameRate = playlist.attributes['FRAME-RATE'];\n  }\n\n  this.codecs = codecsForPlaylist(mpc.master(), playlist);\n  this.playlist = playlist; // The id is simply the ordinality of the media playlist\n  // within the master playlist\n\n  this.id = id; // Partially-apply the enableFunction to create a playlist-\n  // specific variant\n\n  this.enabled = enableFunction(vhsHandler.playlists, playlist.id, qualityChangeFunction);\n};\n/**\n * A mixin function that adds the `representations` api to an instance\n * of the VhsHandler class\n *\n * @param {VhsHandler} vhsHandler - An instance of VhsHandler to add the\n * representation API into\n */\n\n\nvar renditionSelectionMixin = function renditionSelectionMixin(vhsHandler) {\n  // Add a single API-specific function to the VhsHandler instance\n  vhsHandler.representations = function () {\n    var master = vhsHandler.masterPlaylistController_.master();\n    var playlists = isAudioOnly(master) ? vhsHandler.masterPlaylistController_.getAudioTrackPlaylists_() : master.playlists;\n\n    if (!playlists) {\n      return [];\n    }\n\n    return playlists.filter(function (media) {\n      return !isIncompatible(media);\n    }).map(function (e, i) {\n      return new Representation(vhsHandler, e, e.id);\n    });\n  };\n};\n\n/**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n\nvar timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n/**\n * @class PlaybackWatcher\n */\n\nvar PlaybackWatcher = /*#__PURE__*/function () {\n  /**\n   * Represents an PlaybackWatcher object.\n   *\n   * @class\n   * @param {Object} options an object that includes the tech and settings\n   */\n  function PlaybackWatcher(options) {\n    var _this = this;\n\n    this.masterPlaylistController_ = options.masterPlaylistController;\n    this.tech_ = options.tech;\n    this.seekable = options.seekable;\n    this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;\n    this.liveRangeSafeTimeDelta = options.liveRangeSafeTimeDelta;\n    this.media = options.media;\n    this.consecutiveUpdates = 0;\n    this.lastRecordedTime = null;\n    this.timer_ = null;\n    this.checkCurrentTimeTimeout_ = null;\n    this.logger_ = logger('PlaybackWatcher');\n    this.logger_('initialize');\n\n    var playHandler = function playHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var canPlayHandler = function canPlayHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var waitingHandler = function waitingHandler() {\n      return _this.techWaiting_();\n    };\n\n    var cancelTimerHandler = function cancelTimerHandler() {\n      return _this.cancelTimer_();\n    };\n\n    var mpc = this.masterPlaylistController_;\n    var loaderTypes = ['main', 'subtitle', 'audio'];\n    var loaderChecks = {};\n    loaderTypes.forEach(function (type) {\n      loaderChecks[type] = {\n        reset: function reset() {\n          return _this.resetSegmentDownloads_(type);\n        },\n        updateend: function updateend() {\n          return _this.checkSegmentDownloads_(type);\n        }\n      };\n      mpc[type + \"SegmentLoader_\"].on('appendsdone', loaderChecks[type].updateend); // If a rendition switch happens during a playback stall where the buffer\n      // isn't changing we want to reset. We cannot assume that the new rendition\n      // will also be stalled, until after new appends.\n\n      mpc[type + \"SegmentLoader_\"].on('playlistupdate', loaderChecks[type].reset); // Playback stalls should not be detected right after seeking.\n      // This prevents one segment playlists (single vtt or single segment content)\n      // from being detected as stalling. As the buffer will not change in those cases, since\n      // the buffer is the entire video duration.\n\n      _this.tech_.on(['seeked', 'seeking'], loaderChecks[type].reset);\n    });\n    /**\n     * We check if a seek was into a gap through the following steps:\n     * 1. We get a seeking event and we do not get a seeked event. This means that\n     *    a seek was attempted but not completed.\n     * 2. We run `fixesBadSeeks_` on segment loader appends. This means that we already\n     *    removed everything from our buffer and appended a segment, and should be ready\n     *    to check for gaps.\n     */\n\n    var setSeekingHandlers = function setSeekingHandlers(fn) {\n      ['main', 'audio'].forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"][fn]('appended', _this.seekingAppendCheck_);\n      });\n    };\n\n    this.seekingAppendCheck_ = function () {\n      if (_this.fixesBadSeeks_()) {\n        _this.consecutiveUpdates = 0;\n        _this.lastRecordedTime = _this.tech_.currentTime();\n        setSeekingHandlers('off');\n      }\n    };\n\n    this.clearSeekingAppendCheck_ = function () {\n      return setSeekingHandlers('off');\n    };\n\n    this.watchForBadSeeking_ = function () {\n      _this.clearSeekingAppendCheck_();\n\n      setSeekingHandlers('on');\n    };\n\n    this.tech_.on('seeked', this.clearSeekingAppendCheck_);\n    this.tech_.on('seeking', this.watchForBadSeeking_);\n    this.tech_.on('waiting', waitingHandler);\n    this.tech_.on(timerCancelEvents, cancelTimerHandler);\n    this.tech_.on('canplay', canPlayHandler);\n    /*\n      An edge case exists that results in gaps not being skipped when they exist at the beginning of a stream. This case\n      is surfaced in one of two ways:\n       1)  The `waiting` event is fired before the player has buffered content, making it impossible\n          to find or skip the gap. The `waiting` event is followed by a `play` event. On first play\n          we can check if playback is stalled due to a gap, and skip the gap if necessary.\n      2)  A source with a gap at the beginning of the stream is loaded programatically while the player\n          is in a playing state. To catch this case, it's important that our one-time play listener is setup\n          even if the player is in a playing state\n    */\n\n    this.tech_.one('play', playHandler); // Define the dispose function to clean up our events\n\n    this.dispose = function () {\n      _this.clearSeekingAppendCheck_();\n\n      _this.logger_('dispose');\n\n      _this.tech_.off('waiting', waitingHandler);\n\n      _this.tech_.off(timerCancelEvents, cancelTimerHandler);\n\n      _this.tech_.off('canplay', canPlayHandler);\n\n      _this.tech_.off('play', playHandler);\n\n      _this.tech_.off('seeking', _this.watchForBadSeeking_);\n\n      _this.tech_.off('seeked', _this.clearSeekingAppendCheck_);\n\n      loaderTypes.forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"].off('appendsdone', loaderChecks[type].updateend);\n        mpc[type + \"SegmentLoader_\"].off('playlistupdate', loaderChecks[type].reset);\n\n        _this.tech_.off(['seeked', 'seeking'], loaderChecks[type].reset);\n      });\n\n      if (_this.checkCurrentTimeTimeout_) {\n        window$1.clearTimeout(_this.checkCurrentTimeTimeout_);\n      }\n\n      _this.cancelTimer_();\n    };\n  }\n  /**\n   * Periodically check current time to see if playback stopped\n   *\n   * @private\n   */\n\n\n  var _proto = PlaybackWatcher.prototype;\n\n  _proto.monitorCurrentTime_ = function monitorCurrentTime_() {\n    this.checkCurrentTime_();\n\n    if (this.checkCurrentTimeTimeout_) {\n      window$1.clearTimeout(this.checkCurrentTimeTimeout_);\n    } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n\n\n    this.checkCurrentTimeTimeout_ = window$1.setTimeout(this.monitorCurrentTime_.bind(this), 250);\n  }\n  /**\n   * Reset stalled download stats for a specific type of loader\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#playlistupdate\n   * @listens Tech#seeking\n   * @listens Tech#seeked\n   */\n  ;\n\n  _proto.resetSegmentDownloads_ = function resetSegmentDownloads_(type) {\n    var loader = this.masterPlaylistController_[type + \"SegmentLoader_\"];\n\n    if (this[type + \"StalledDownloads_\"] > 0) {\n      this.logger_(\"resetting possible stalled download count for \" + type + \" loader\");\n    }\n\n    this[type + \"StalledDownloads_\"] = 0;\n    this[type + \"Buffered_\"] = loader.buffered_();\n  }\n  /**\n   * Checks on every segment `appendsdone` to see\n   * if segment appends are making progress. If they are not\n   * and we are still downloading bytes. We blacklist the playlist.\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#appendsdone\n   */\n  ;\n\n  _proto.checkSegmentDownloads_ = function checkSegmentDownloads_(type) {\n    var mpc = this.masterPlaylistController_;\n    var loader = mpc[type + \"SegmentLoader_\"];\n    var buffered = loader.buffered_();\n    var isBufferedDifferent = isRangeDifferent(this[type + \"Buffered_\"], buffered);\n    this[type + \"Buffered_\"] = buffered; // if another watcher is going to fix the issue or\n    // the buffered value for this loader changed\n    // appends are working\n\n    if (isBufferedDifferent) {\n      this.resetSegmentDownloads_(type);\n      return;\n    }\n\n    this[type + \"StalledDownloads_\"]++;\n    this.logger_(\"found #\" + this[type + \"StalledDownloads_\"] + \" \" + type + \" appends that did not increase buffer (possible stalled download)\", {\n      playlistId: loader.playlist_ && loader.playlist_.id,\n      buffered: timeRangesToArray(buffered)\n    }); // after 10 possibly stalled appends with no reset, exclude\n\n    if (this[type + \"StalledDownloads_\"] < 10) {\n      return;\n    }\n\n    this.logger_(type + \" loader stalled download exclusion\");\n    this.resetSegmentDownloads_(type);\n    this.tech_.trigger({\n      type: 'usage',\n      name: \"vhs-\" + type + \"-download-exclusion\"\n    });\n\n    if (type === 'subtitle') {\n      return;\n    } // TODO: should we exclude audio tracks rather than main tracks\n    // when type is audio?\n\n\n    mpc.blacklistCurrentPlaylist({\n      message: \"Excessive \" + type + \" segment downloading detected.\"\n    }, Infinity);\n  }\n  /**\n   * The purpose of this function is to emulate the \"waiting\" event on\n   * browsers that do not emit it when they are waiting for more\n   * data to continue playback\n   *\n   * @private\n   */\n  ;\n\n  _proto.checkCurrentTime_ = function checkCurrentTime_() {\n    if (this.tech_.paused() || this.tech_.seeking()) {\n      return;\n    }\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n      // If current time is at the end of the final buffered region, then any playback\n      // stall is most likely caused by buffering in a low bandwidth environment. The tech\n      // should fire a `waiting` event in this scenario, but due to browser and tech\n      // inconsistencies. Calling `techWaiting_` here allows us to simulate\n      // responding to a native `waiting` event when the tech fails to emit one.\n      return this.techWaiting_();\n    }\n\n    if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n      this.waiting_();\n    } else if (currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n    } else {\n      this.consecutiveUpdates = 0;\n      this.lastRecordedTime = currentTime;\n    }\n  }\n  /**\n   * Cancels any pending timers and resets the 'timeupdate' mechanism\n   * designed to detect that we are stalled\n   *\n   * @private\n   */\n  ;\n\n  _proto.cancelTimer_ = function cancelTimer_() {\n    this.consecutiveUpdates = 0;\n\n    if (this.timer_) {\n      this.logger_('cancelTimer_');\n      clearTimeout(this.timer_);\n    }\n\n    this.timer_ = null;\n  }\n  /**\n   * Fixes situations where there's a bad seek\n   *\n   * @return {boolean} whether an action was taken to fix the seek\n   * @private\n   */\n  ;\n\n  _proto.fixesBadSeeks_ = function fixesBadSeeks_() {\n    var seeking = this.tech_.seeking();\n\n    if (!seeking) {\n      return false;\n    } // TODO: It's possible that these seekable checks should be moved out of this function\n    // and into a function that runs on seekablechange. It's also possible that we only need\n    // afterSeekableWindow as the buffered check at the bottom is good enough to handle before\n    // seekable range.\n\n\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n    var isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);\n    var seekTo;\n\n    if (isAfterSeekableRange) {\n      var seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n\n      seekTo = seekableEnd;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var seekableStart = seekable.start(0); // sync to the beginning of the live window\n      // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n\n      seekTo = seekableStart + ( // if the playlist is too short and the seekable range is an exact time (can\n      // happen in live with a 3 segment playlist), then don't use a time delta\n      seekableStart === seekable.end(0) ? 0 : SAFE_TIME_DELTA);\n    }\n\n    if (typeof seekTo !== 'undefined') {\n      this.logger_(\"Trying to seek outside of seekable at time \" + currentTime + \" with \" + (\"seekable range \" + printableRange(seekable) + \". Seeking to \") + (seekTo + \".\"));\n      this.tech_.setCurrentTime(seekTo);\n      return true;\n    }\n\n    var sourceUpdater = this.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var audioBuffered = sourceUpdater.audioBuffer ? sourceUpdater.audioBuffered() : null;\n    var videoBuffered = sourceUpdater.videoBuffer ? sourceUpdater.videoBuffered() : null;\n    var media = this.media(); // verify that at least two segment durations or one part duration have been\n    // appended before checking for a gap.\n\n    var minAppendedDuration = media.partTargetDuration ? media.partTargetDuration : (media.targetDuration - TIME_FUDGE_FACTOR) * 2; // verify that at least two segment durations have been\n    // appended before checking for a gap.\n\n    var bufferedToCheck = [audioBuffered, videoBuffered];\n\n    for (var i = 0; i < bufferedToCheck.length; i++) {\n      // skip null buffered\n      if (!bufferedToCheck[i]) {\n        continue;\n      }\n\n      var timeAhead = timeAheadOf(bufferedToCheck[i], currentTime); // if we are less than two video/audio segment durations or one part\n      // duration behind we haven't appended enough to call this a bad seek.\n\n      if (timeAhead < minAppendedDuration) {\n        return false;\n      }\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // we have appended enough content, but we don't have anything buffered\n    // to seek over the gap\n\n    if (nextRange.length === 0) {\n      return false;\n    }\n\n    seekTo = nextRange.start(0) + SAFE_TIME_DELTA;\n    this.logger_(\"Buffered region starts (\" + nextRange.start(0) + \") \" + (\" just beyond seek point (\" + currentTime + \"). Seeking to \" + seekTo + \".\"));\n    this.tech_.setCurrentTime(seekTo);\n    return true;\n  }\n  /**\n   * Handler for situations when we determine the player is waiting.\n   *\n   * @private\n   */\n  ;\n\n  _proto.waiting_ = function waiting_() {\n    if (this.techWaiting_()) {\n      return;\n    } // All tech waiting checks failed. Use last resort correction\n\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n    var currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered\n    // region with no indication that anything is amiss (seen in Firefox). Seeking to\n    // currentTime is usually enough to kickstart the player. This checks that the player\n    // is currently within a buffered region before attempting a corrective seek.\n    // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n    // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n    // make sure there is ~3 seconds of forward buffer before taking any corrective action\n    // to avoid triggering an `unknownwaiting` event when the network is slow.\n\n    if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime);\n      this.logger_(\"Stopped at \" + currentTime + \" while inside a buffered region \" + (\"[\" + currentRange.start(0) + \" -> \" + currentRange.end(0) + \"]. Attempting to resume \") + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-unknown-waiting'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-unknown-waiting'\n      });\n      return;\n    }\n  }\n  /**\n   * Handler for situations when the tech fires a `waiting` event\n   *\n   * @return {boolean}\n   *         True if an action (or none) was needed to correct the waiting. False if no\n   *         checks passed\n   * @private\n   */\n  ;\n\n  _proto.techWaiting_ = function techWaiting_() {\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n\n    if (this.tech_.seeking() || this.timer_ !== null) {\n      // Tech is seeking or already waiting on another action, no action needed\n      return true;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var livePoint = seekable.end(seekable.length - 1);\n      this.logger_(\"Fell out of live window at time \" + currentTime + \". Seeking to \" + (\"live point (seekable end) \" + livePoint));\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-live-resync'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-live-resync'\n      });\n      return true;\n    }\n\n    var sourceUpdater = this.tech_.vhs.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var videoUnderflow = this.videoUnderflow_({\n      audioBuffered: sourceUpdater.audioBuffered(),\n      videoBuffered: sourceUpdater.videoBuffered(),\n      currentTime: currentTime\n    });\n\n    if (videoUnderflow) {\n      // Even though the video underflowed and was stuck in a gap, the audio overplayed\n      // the gap, leading currentTime into a buffered range. Seeking to currentTime\n      // allows the video to catch up to the audio position without losing any audio\n      // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-video-underflow'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-video-underflow'\n      });\n      return true;\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // check for gap\n\n    if (nextRange.length > 0) {\n      var difference = nextRange.start(0) - currentTime;\n      this.logger_(\"Stopped at \" + currentTime + \", setting timer for \" + difference + \", seeking \" + (\"to \" + nextRange.start(0)));\n      this.cancelTimer_();\n      this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);\n      return true;\n    } // All checks failed. Returning false to indicate failure to correct waiting\n\n\n    return false;\n  };\n\n  _proto.afterSeekableWindow_ = function afterSeekableWindow_(seekable, currentTime, playlist, allowSeeksWithinUnsafeLiveWindow) {\n    if (allowSeeksWithinUnsafeLiveWindow === void 0) {\n      allowSeeksWithinUnsafeLiveWindow = false;\n    }\n\n    if (!seekable.length) {\n      // we can't make a solid case if there's no seekable, default to false\n      return false;\n    }\n\n    var allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;\n    var isLive = !playlist.endList;\n\n    if (isLive && allowSeeksWithinUnsafeLiveWindow) {\n      allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;\n    }\n\n    if (currentTime > allowedEnd) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.beforeSeekableWindow_ = function beforeSeekableWindow_(seekable, currentTime) {\n    if (seekable.length && // can't fall before 0 and 0 seekable start identifies VOD stream\n    seekable.start(0) > 0 && currentTime < seekable.start(0) - this.liveRangeSafeTimeDelta) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.videoUnderflow_ = function videoUnderflow_(_ref) {\n    var videoBuffered = _ref.videoBuffered,\n        audioBuffered = _ref.audioBuffered,\n        currentTime = _ref.currentTime;\n\n    // audio only content will not have video underflow :)\n    if (!videoBuffered) {\n      return;\n    }\n\n    var gap; // find a gap in demuxed content.\n\n    if (videoBuffered.length && audioBuffered.length) {\n      // in Chrome audio will continue to play for ~3s when we run out of video\n      // so we have to check that the video buffer did have some buffer in the\n      // past.\n      var lastVideoRange = findRange(videoBuffered, currentTime - 3);\n      var videoRange = findRange(videoBuffered, currentTime);\n      var audioRange = findRange(audioBuffered, currentTime);\n\n      if (audioRange.length && !videoRange.length && lastVideoRange.length) {\n        gap = {\n          start: lastVideoRange.end(0),\n          end: audioRange.end(0)\n        };\n      } // find a gap in muxed content.\n\n    } else {\n      var nextRange = findNextRange(videoBuffered, currentTime); // Even if there is no available next range, there is still a possibility we are\n      // stuck in a gap due to video underflow.\n\n      if (!nextRange.length) {\n        gap = this.gapFromVideoUnderflow_(videoBuffered, currentTime);\n      }\n    }\n\n    if (gap) {\n      this.logger_(\"Encountered a gap in video from \" + gap.start + \" to \" + gap.end + \". \" + (\"Seeking to current time \" + currentTime));\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Timer callback. If playback still has not proceeded, then we seek\n   * to the start of the next buffered region.\n   *\n   * @private\n   */\n  ;\n\n  _proto.skipTheGap_ = function skipTheGap_(scheduledCurrentTime) {\n    var buffered = this.tech_.buffered();\n    var currentTime = this.tech_.currentTime();\n    var nextRange = findNextRange(buffered, currentTime);\n    this.cancelTimer_();\n\n    if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n      return;\n    }\n\n    this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played\n\n    this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-gap-skip'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-gap-skip'\n    });\n  };\n\n  _proto.gapFromVideoUnderflow_ = function gapFromVideoUnderflow_(buffered, currentTime) {\n    // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n    // playing for ~3 seconds after the video gap starts. This is done to account for\n    // video buffer underflow/underrun (note that this is not done when there is audio\n    // buffer underflow/underrun -- in that case the video will stop as soon as it\n    // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n    // video stalls). The player's time will reflect the playthrough of audio, so the\n    // time will appear as if we are in a buffered region, even if we are stuck in a\n    // \"gap.\"\n    //\n    // Example:\n    // video buffer:   0 => 10.1, 10.2 => 20\n    // audio buffer:   0 => 20\n    // overall buffer: 0 => 10.1, 10.2 => 20\n    // current time: 13\n    //\n    // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n    // however, the audio continued playing until it reached ~3 seconds past the gap\n    // (13 seconds), at which point it stops as well. Since current time is past the\n    // gap, findNextRange will return no ranges.\n    //\n    // To check for this issue, we see if there is a gap that starts somewhere within\n    // a 3 second range (3 seconds +/- 1 second) back from our current time.\n    var gaps = findGaps(buffered);\n\n    for (var i = 0; i < gaps.length; i++) {\n      var start = gaps.start(i);\n      var end = gaps.end(i); // gap is starts no more than 4 seconds back\n\n      if (currentTime - start < 4 && currentTime - start > 2) {\n        return {\n          start: start,\n          end: end\n        };\n      }\n    }\n\n    return null;\n  };\n\n  return PlaybackWatcher;\n}();\n\nvar defaultOptions = {\n  errorInterval: 30,\n  getSource: function getSource(next) {\n    var tech = this.tech({\n      IWillNotUseThisInPlugins: true\n    });\n    var sourceObj = tech.currentSource_ || this.currentSource();\n    return next(sourceObj);\n  }\n};\n/**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\n\nvar initPlugin = function initPlugin(player, options) {\n  var lastCalled = 0;\n  var seekTo = 0;\n  var localOptions = videojs.mergeOptions(defaultOptions, options);\n  player.ready(function () {\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload-initialized'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload-initialized'\n    });\n  });\n  /**\n   * Player modifications to perform that must wait until `loadedmetadata`\n   * has been triggered\n   *\n   * @private\n   */\n\n  var loadedMetadataHandler = function loadedMetadataHandler() {\n    if (seekTo) {\n      player.currentTime(seekTo);\n    }\n  };\n  /**\n   * Set the source on the player element, play, and seek if necessary\n   *\n   * @param {Object} sourceObj An object specifying the source url and mime-type to play\n   * @private\n   */\n\n\n  var setSource = function setSource(sourceObj) {\n    if (sourceObj === null || sourceObj === undefined) {\n      return;\n    }\n\n    seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n    player.one('loadedmetadata', loadedMetadataHandler);\n    player.src(sourceObj);\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload'\n    });\n    player.play();\n  };\n  /**\n   * Attempt to get a source from either the built-in getSource function\n   * or a custom function provided via the options\n   *\n   * @private\n   */\n\n\n  var errorHandler = function errorHandler() {\n    // Do not attempt to reload the source if a source-reload occurred before\n    // 'errorInterval' time has elapsed since the last source-reload\n    if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n      player.trigger({\n        type: 'usage',\n        name: 'vhs-error-reload-canceled'\n      });\n      player.trigger({\n        type: 'usage',\n        name: 'hls-error-reload-canceled'\n      });\n      return;\n    }\n\n    if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n      videojs.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n      return;\n    }\n\n    lastCalled = Date.now();\n    return localOptions.getSource.call(player, setSource);\n  };\n  /**\n   * Unbind any event handlers that were bound by the plugin\n   *\n   * @private\n   */\n\n\n  var cleanupEvents = function cleanupEvents() {\n    player.off('loadedmetadata', loadedMetadataHandler);\n    player.off('error', errorHandler);\n    player.off('dispose', cleanupEvents);\n  };\n  /**\n   * Cleanup before re-initializing the plugin\n   *\n   * @param {Object} [newOptions] an object with plugin options\n   * @private\n   */\n\n\n  var reinitPlugin = function reinitPlugin(newOptions) {\n    cleanupEvents();\n    initPlugin(player, newOptions);\n  };\n\n  player.on('error', errorHandler);\n  player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before\n  // initializing the plugin\n\n  player.reloadSourceOnError = reinitPlugin;\n};\n/**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\n\n\nvar reloadSourceOnError = function reloadSourceOnError(options) {\n  initPlugin(this, options);\n};\n\nvar version$4 = \"2.16.2\";\n\nvar version$3 = \"6.0.1\";\n\nvar version$2 = \"0.22.1\";\n\nvar version$1 = \"4.8.0\";\n\nvar version = \"3.1.3\";\n\nvar Vhs = {\n  PlaylistLoader: PlaylistLoader,\n  Playlist: Playlist,\n  utils: utils,\n  STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,\n  INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,\n  lastBandwidthSelector: lastBandwidthSelector,\n  movingAverageBandwidthSelector: movingAverageBandwidthSelector,\n  comparePlaylistBandwidth: comparePlaylistBandwidth,\n  comparePlaylistResolution: comparePlaylistResolution,\n  xhr: xhrFactory()\n}; // Define getter/setters for config properties\n\nObject.keys(Config).forEach(function (prop) {\n  Object.defineProperty(Vhs, prop, {\n    get: function get() {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n      return Config[prop];\n    },\n    set: function set(value) {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n\n      if (typeof value !== 'number' || value < 0) {\n        videojs.log.warn(\"value of Vhs.\" + prop + \" must be greater than or equal to 0\");\n        return;\n      }\n\n      Config[prop] = value;\n    }\n  });\n});\nvar LOCAL_STORAGE_KEY = 'videojs-vhs';\n/**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in vhs.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleVhsMediaChange\n */\n\nvar handleVhsMediaChange = function handleVhsMediaChange(qualityLevels, playlistLoader) {\n  var newPlaylist = playlistLoader.media();\n  var selectedIndex = -1;\n\n  for (var i = 0; i < qualityLevels.length; i++) {\n    if (qualityLevels[i].id === newPlaylist.id) {\n      selectedIndex = i;\n      break;\n    }\n  }\n\n  qualityLevels.selectedIndex_ = selectedIndex;\n  qualityLevels.trigger({\n    selectedIndex: selectedIndex,\n    type: 'change'\n  });\n};\n/**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} vhs Vhs object to listen to for media events.\n * @function handleVhsLoadedMetadata\n */\n\n\nvar handleVhsLoadedMetadata = function handleVhsLoadedMetadata(qualityLevels, vhs) {\n  vhs.representations().forEach(function (rep) {\n    qualityLevels.addQualityLevel(rep);\n  });\n  handleVhsMediaChange(qualityLevels, vhs.playlists);\n}; // HLS is a source handler, not a tech. Make sure attempts to use it\n// as one do not cause exceptions.\n\n\nVhs.canPlaySource = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar emeKeySystems = function emeKeySystems(keySystemOptions, mainPlaylist, audioPlaylist) {\n  if (!keySystemOptions) {\n    return keySystemOptions;\n  }\n\n  var codecs = {};\n\n  if (mainPlaylist && mainPlaylist.attributes && mainPlaylist.attributes.CODECS) {\n    codecs = unwrapCodecList(parseCodecs(mainPlaylist.attributes.CODECS));\n  }\n\n  if (audioPlaylist && audioPlaylist.attributes && audioPlaylist.attributes.CODECS) {\n    codecs.audio = audioPlaylist.attributes.CODECS;\n  }\n\n  var videoContentType = getMimeForCodec(codecs.video);\n  var audioContentType = getMimeForCodec(codecs.audio); // upsert the content types based on the selected playlist\n\n  var keySystemContentTypes = {};\n\n  for (var keySystem in keySystemOptions) {\n    keySystemContentTypes[keySystem] = {};\n\n    if (audioContentType) {\n      keySystemContentTypes[keySystem].audioContentType = audioContentType;\n    }\n\n    if (videoContentType) {\n      keySystemContentTypes[keySystem].videoContentType = videoContentType;\n    } // Default to using the video playlist's PSSH even though they may be different, as\n    // videojs-contrib-eme will only accept one in the options.\n    //\n    // This shouldn't be an issue for most cases as early intialization will handle all\n    // unique PSSH values, and if they aren't, then encrypted events should have the\n    // specific information needed for the unique license.\n\n\n    if (mainPlaylist.contentProtection && mainPlaylist.contentProtection[keySystem] && mainPlaylist.contentProtection[keySystem].pssh) {\n      keySystemContentTypes[keySystem].pssh = mainPlaylist.contentProtection[keySystem].pssh;\n    } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'\n    // so we need to prevent overwriting the URL entirely\n\n\n    if (typeof keySystemOptions[keySystem] === 'string') {\n      keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];\n    }\n  }\n\n  return videojs.mergeOptions(keySystemOptions, keySystemContentTypes);\n};\n/**\n * @typedef {Object} KeySystems\n *\n * keySystems configuration for https://github.com/videojs/videojs-contrib-eme\n * Note: not all options are listed here.\n *\n * @property {Uint8Array} [pssh]\n *           Protection System Specific Header\n */\n\n/**\n * Goes through all the playlists and collects an array of KeySystems options objects\n * containing each playlist's keySystems and their pssh values, if available.\n *\n * @param {Object[]} playlists\n *        The playlists to look through\n * @param {string[]} keySystems\n *        The keySystems to collect pssh values for\n *\n * @return {KeySystems[]}\n *         An array of KeySystems objects containing available key systems and their\n *         pssh values\n */\n\n\nvar getAllPsshKeySystemsOptions = function getAllPsshKeySystemsOptions(playlists, keySystems) {\n  return playlists.reduce(function (keySystemsArr, playlist) {\n    if (!playlist.contentProtection) {\n      return keySystemsArr;\n    }\n\n    var keySystemsOptions = keySystems.reduce(function (keySystemsObj, keySystem) {\n      var keySystemOptions = playlist.contentProtection[keySystem];\n\n      if (keySystemOptions && keySystemOptions.pssh) {\n        keySystemsObj[keySystem] = {\n          pssh: keySystemOptions.pssh\n        };\n      }\n\n      return keySystemsObj;\n    }, {});\n\n    if (Object.keys(keySystemsOptions).length) {\n      keySystemsArr.push(keySystemsOptions);\n    }\n\n    return keySystemsArr;\n  }, []);\n};\n/**\n * Returns a promise that waits for the\n * [eme plugin](https://github.com/videojs/videojs-contrib-eme) to create a key session.\n *\n * Works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449 in non-IE11\n * browsers.\n *\n * As per the above ticket, this is particularly important for Chrome, where, if\n * unencrypted content is appended before encrypted content and the key session has not\n * been created, a MEDIA_ERR_DECODE will be thrown once the encrypted content is reached\n * during playback.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n * @param {Object[]} mainPlaylists\n *        The playlists found on the master playlist object\n *\n * @return {Object}\n *         Promise that resolves when the key session has been created\n */\n\n\nvar waitForKeySessionCreation = function waitForKeySessionCreation(_ref) {\n  var player = _ref.player,\n      sourceKeySystems = _ref.sourceKeySystems,\n      audioMedia = _ref.audioMedia,\n      mainPlaylists = _ref.mainPlaylists;\n\n  if (!player.eme.initializeMediaKeys) {\n    return Promise.resolve();\n  } // TODO should all audio PSSH values be initialized for DRM?\n  //\n  // All unique video rendition pssh values are initialized for DRM, but here only\n  // the initial audio playlist license is initialized. In theory, an encrypted\n  // event should be fired if the user switches to an alternative audio playlist\n  // where a license is required, but this case hasn't yet been tested. In addition, there\n  // may be many alternate audio playlists unlikely to be used (e.g., multiple different\n  // languages).\n\n\n  var playlists = audioMedia ? mainPlaylists.concat([audioMedia]) : mainPlaylists;\n  var keySystemsOptionsArr = getAllPsshKeySystemsOptions(playlists, Object.keys(sourceKeySystems));\n  var initializationFinishedPromises = [];\n  var keySessionCreatedPromises = []; // Since PSSH values are interpreted as initData, EME will dedupe any duplicates. The\n  // only place where it should not be deduped is for ms-prefixed APIs, but the early\n  // return for IE11 above, and the existence of modern EME APIs in addition to\n  // ms-prefixed APIs on Edge should prevent this from being a concern.\n  // initializeMediaKeys also won't use the webkit-prefixed APIs.\n\n  keySystemsOptionsArr.forEach(function (keySystemsOptions) {\n    keySessionCreatedPromises.push(new Promise(function (resolve, reject) {\n      player.tech_.one('keysessioncreated', resolve);\n    }));\n    initializationFinishedPromises.push(new Promise(function (resolve, reject) {\n      player.eme.initializeMediaKeys({\n        keySystems: keySystemsOptions\n      }, function (err) {\n        if (err) {\n          reject(err);\n          return;\n        }\n\n        resolve();\n      });\n    }));\n  }); // The reasons Promise.race is chosen over Promise.any:\n  //\n  // * Promise.any is only available in Safari 14+.\n  // * None of these promises are expected to reject. If they do reject, it might be\n  //   better here for the race to surface the rejection, rather than mask it by using\n  //   Promise.any.\n\n  return Promise.race([// If a session was previously created, these will all finish resolving without\n  // creating a new session, otherwise it will take until the end of all license\n  // requests, which is why the key session check is used (to make setup much faster).\n  Promise.all(initializationFinishedPromises), // Once a single session is created, the browser knows DRM will be used.\n  Promise.race(keySessionCreatedPromises)]);\n};\n/**\n * If the [eme](https://github.com/videojs/videojs-contrib-eme) plugin is available, and\n * there are keySystems on the source, sets up source options to prepare the source for\n * eme.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} media\n *        The active media playlist\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n *\n * @return {boolean}\n *         Whether or not options were configured and EME is available\n */\n\nvar setupEmeOptions = function setupEmeOptions(_ref2) {\n  var player = _ref2.player,\n      sourceKeySystems = _ref2.sourceKeySystems,\n      media = _ref2.media,\n      audioMedia = _ref2.audioMedia;\n  var sourceOptions = emeKeySystems(sourceKeySystems, media, audioMedia);\n\n  if (!sourceOptions) {\n    return false;\n  }\n\n  player.currentSource().keySystems = sourceOptions; // eme handles the rest of the setup, so if it is missing\n  // do nothing.\n\n  if (sourceOptions && !player.eme) {\n    videojs.log.warn('DRM encrypted source cannot be decrypted without a DRM plugin');\n    return false;\n  }\n\n  return true;\n};\n\nvar getVhsLocalStorage = function getVhsLocalStorage() {\n  if (!window$1.localStorage) {\n    return null;\n  }\n\n  var storedObject = window$1.localStorage.getItem(LOCAL_STORAGE_KEY);\n\n  if (!storedObject) {\n    return null;\n  }\n\n  try {\n    return JSON.parse(storedObject);\n  } catch (e) {\n    // someone may have tampered with the value\n    return null;\n  }\n};\n\nvar updateVhsLocalStorage = function updateVhsLocalStorage(options) {\n  if (!window$1.localStorage) {\n    return false;\n  }\n\n  var objectToStore = getVhsLocalStorage();\n  objectToStore = objectToStore ? videojs.mergeOptions(objectToStore, options) : options;\n\n  try {\n    window$1.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(objectToStore));\n  } catch (e) {\n    // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where\n    // storage is set to 0).\n    // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions\n    // No need to perform any operation.\n    return false;\n  }\n\n  return objectToStore;\n};\n/**\n * Parses VHS-supported media types from data URIs. See\n * https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs\n * for information on data URIs.\n *\n * @param {string} dataUri\n *        The data URI\n *\n * @return {string|Object}\n *         The parsed object/string, or the original string if no supported media type\n *         was found\n */\n\n\nvar expandDataUri = function expandDataUri(dataUri) {\n  if (dataUri.toLowerCase().indexOf('data:application/vnd.videojs.vhs+json,') === 0) {\n    return JSON.parse(dataUri.substring(dataUri.indexOf(',') + 1));\n  } // no known case for this data URI, return the string as-is\n\n\n  return dataUri;\n};\n/**\n * Whether the browser has built-in HLS support.\n */\n\n\nVhs.supportsNativeHls = function () {\n  if (!document || !document.createElement) {\n    return false;\n  }\n\n  var video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't\n\n  if (!videojs.getTech('Html5').isSupported()) {\n    return false;\n  } // HLS manifests can go by many mime-types\n\n\n  var canPlay = [// Apple santioned\n  'application/vnd.apple.mpegurl', // Apple sanctioned for backwards compatibility\n  'audio/mpegurl', // Very common\n  'audio/x-mpegurl', // Very common\n  'application/x-mpegurl', // Included for completeness\n  'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n  return canPlay.some(function (canItPlay) {\n    return /maybe|probably/i.test(video.canPlayType(canItPlay));\n  });\n}();\n\nVhs.supportsNativeDash = function () {\n  if (!document || !document.createElement || !videojs.getTech('Html5').isSupported()) {\n    return false;\n  }\n\n  return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));\n}();\n\nVhs.supportsTypeNatively = function (type) {\n  if (type === 'hls') {\n    return Vhs.supportsNativeHls;\n  }\n\n  if (type === 'dash') {\n    return Vhs.supportsNativeDash;\n  }\n\n  return false;\n};\n/**\n * HLS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\n\n\nVhs.isSupported = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar Component = videojs.getComponent('Component');\n/**\n * The Vhs Handler object, where we orchestrate all of the parts\n * of HLS to interact with video.js\n *\n * @class VhsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\nvar VhsHandler = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VhsHandler, _Component);\n\n  function VhsHandler(source, tech, options) {\n    var _this;\n\n    _this = _Component.call(this, tech, videojs.mergeOptions(options.hls, options.vhs)) || this;\n\n    if (options.hls && Object.keys(options.hls).length) {\n      videojs.log.warn('Using hls options is deprecated. Please rename `hls` to `vhs` in your options object.');\n    } // if a tech level `initialBandwidth` option was passed\n    // use that over the VHS level `bandwidth` option\n\n\n    if (typeof options.initialBandwidth === 'number') {\n      _this.options_.bandwidth = options.initialBandwidth;\n    }\n\n    _this.logger_ = logger('VhsHandler'); // tech.player() is deprecated but setup a reference to HLS for\n    // backwards-compatibility\n\n    if (tech.options_ && tech.options_.playerId) {\n      var _player = videojs(tech.options_.playerId);\n\n      if (!_player.hasOwnProperty('hls')) {\n        Object.defineProperty(_player, 'hls', {\n          get: function get() {\n            videojs.log.warn('player.hls is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'hls-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('vhs')) {\n        Object.defineProperty(_player, 'vhs', {\n          get: function get() {\n            videojs.log.warn('player.vhs is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'vhs-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('dash')) {\n        Object.defineProperty(_player, 'dash', {\n          get: function get() {\n            videojs.log.warn('player.dash is deprecated. Use player.tech().vhs instead.');\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      _this.player_ = _player;\n    }\n\n    _this.tech_ = tech;\n    _this.source_ = source;\n    _this.stats = {};\n    _this.ignoreNextSeekingEvent_ = false;\n\n    _this.setOptions_();\n\n    if (_this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {\n      tech.overrideNativeAudioTracks(true);\n      tech.overrideNativeVideoTracks(true);\n    } else if (_this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n      // overriding native HLS only works if audio tracks have been emulated\n      // error early if we're misconfigured\n      throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n    } // listen for fullscreenchange events for this player so that we\n    // can adjust our quality selection quickly\n\n\n    _this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {\n      var fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n\n      if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) {\n        _this.masterPlaylistController_.fastQualityChange_();\n      } else {\n        // When leaving fullscreen, since the in page pixel dimensions should be smaller\n        // than full screen, see if there should be a rendition switch down to preserve\n        // bandwidth.\n        _this.masterPlaylistController_.checkABR_();\n      }\n    });\n\n    _this.on(_this.tech_, 'seeking', function () {\n      if (this.ignoreNextSeekingEvent_) {\n        this.ignoreNextSeekingEvent_ = false;\n        return;\n      }\n\n      this.setCurrentTime(this.tech_.currentTime());\n    });\n\n    _this.on(_this.tech_, 'error', function () {\n      // verify that the error was real and we are loaded\n      // enough to have mpc loaded.\n      if (this.tech_.error() && this.masterPlaylistController_) {\n        this.masterPlaylistController_.pauseLoading();\n      }\n    });\n\n    _this.on(_this.tech_, 'play', _this.play);\n\n    return _this;\n  }\n\n  var _proto = VhsHandler.prototype;\n\n  _proto.setOptions_ = function setOptions_() {\n    var _this2 = this;\n\n    // defaults\n    this.options_.withCredentials = this.options_.withCredentials || false;\n    this.options_.handleManifestRedirects = this.options_.handleManifestRedirects === false ? false : true;\n    this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;\n    this.options_.useDevicePixelRatio = this.options_.useDevicePixelRatio || false;\n    this.options_.smoothQualityChange = this.options_.smoothQualityChange || false;\n    this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;\n    this.options_.useNetworkInformationApi = this.options_.useNetworkInformationApi || false;\n    this.options_.useDtsForTimestampOffset = this.options_.useDtsForTimestampOffset || false;\n    this.options_.customTagParsers = this.options_.customTagParsers || [];\n    this.options_.customTagMappers = this.options_.customTagMappers || [];\n    this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;\n\n    if (typeof this.options_.blacklistDuration !== 'number') {\n      this.options_.blacklistDuration = 5 * 60;\n    }\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      if (this.options_.useBandwidthFromLocalStorage) {\n        var storedObject = getVhsLocalStorage();\n\n        if (storedObject && storedObject.bandwidth) {\n          this.options_.bandwidth = storedObject.bandwidth;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-bandwidth-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-bandwidth-from-local-storage'\n          });\n        }\n\n        if (storedObject && storedObject.throughput) {\n          this.options_.throughput = storedObject.throughput;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-throughput-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-throughput-from-local-storage'\n          });\n        }\n      }\n    } // if bandwidth was not set by options or pulled from local storage, start playlist\n    // selection at a reasonable bandwidth\n\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      this.options_.bandwidth = Config.INITIAL_BANDWIDTH;\n    } // If the bandwidth number is unchanged from the initial setting\n    // then this takes precedence over the enableLowInitialPlaylist option\n\n\n    this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src\n\n    ['withCredentials', 'useDevicePixelRatio', 'limitRenditionByPlayerDimensions', 'bandwidth', 'smoothQualityChange', 'customTagParsers', 'customTagMappers', 'handleManifestRedirects', 'cacheEncryptionKeys', 'playlistSelector', 'initialPlaylistSelector', 'experimentalBufferBasedABR', 'liveRangeSafeTimeDelta', 'experimentalLLHLS', 'useNetworkInformationApi', 'useDtsForTimestampOffset', 'experimentalExactManifestTimings', 'experimentalLeastPixelDiffSelector'].forEach(function (option) {\n      if (typeof _this2.source_[option] !== 'undefined') {\n        _this2.options_[option] = _this2.source_[option];\n      }\n    });\n    this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;\n    this.useDevicePixelRatio = this.options_.useDevicePixelRatio;\n  }\n  /**\n   * called when player.src gets called, handle a new source\n   *\n   * @param {Object} src the source object to handle\n   */\n  ;\n\n  _proto.src = function src(_src, type) {\n    var _this3 = this;\n\n    // do nothing if the src is falsey\n    if (!_src) {\n      return;\n    }\n\n    this.setOptions_(); // add master playlist controller options\n\n    this.options_.src = expandDataUri(this.source_.src);\n    this.options_.tech = this.tech_;\n    this.options_.externVhs = Vhs;\n    this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update the tech\n\n    this.options_.seekTo = function (time) {\n      _this3.tech_.setCurrentTime(time);\n    };\n\n    if (this.options_.smoothQualityChange) {\n      videojs.log.warn('smoothQualityChange is deprecated and will be removed in the next major version');\n    }\n\n    this.masterPlaylistController_ = new MasterPlaylistController(this.options_);\n    var playbackWatcherOptions = videojs.mergeOptions({\n      liveRangeSafeTimeDelta: SAFE_TIME_DELTA\n    }, this.options_, {\n      seekable: function seekable() {\n        return _this3.seekable();\n      },\n      media: function media() {\n        return _this3.masterPlaylistController_.media();\n      },\n      masterPlaylistController: this.masterPlaylistController_\n    });\n    this.playbackWatcher_ = new PlaybackWatcher(playbackWatcherOptions);\n    this.masterPlaylistController_.on('error', function () {\n      var player = videojs.players[_this3.tech_.options_.playerId];\n      var error = _this3.masterPlaylistController_.error;\n\n      if (typeof error === 'object' && !error.code) {\n        error.code = 3;\n      } else if (typeof error === 'string') {\n        error = {\n          message: error,\n          code: 3\n        };\n      }\n\n      player.error(error);\n    });\n    var defaultSelector = this.options_.experimentalBufferBasedABR ? Vhs.movingAverageBandwidthSelector(0.55) : Vhs.STANDARD_PLAYLIST_SELECTOR; // `this` in selectPlaylist should be the VhsHandler for backwards\n    // compatibility with < v2\n\n    this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : defaultSelector.bind(this);\n    this.masterPlaylistController_.selectInitialPlaylist = Vhs.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2\n\n    this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;\n    this.mediaSource = this.masterPlaylistController_.mediaSource; // Proxy assignment of some properties to the master playlist\n    // controller. Using a custom property for backwards compatibility\n    // with < v2\n\n    Object.defineProperties(this, {\n      selectPlaylist: {\n        get: function get() {\n          return this.masterPlaylistController_.selectPlaylist;\n        },\n        set: function set(selectPlaylist) {\n          this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);\n        }\n      },\n      throughput: {\n        get: function get() {\n          return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;\n        },\n        set: function set(throughput) {\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value\n          // for the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;\n        }\n      },\n      bandwidth: {\n        get: function get() {\n          var playerBandwidthEst = this.masterPlaylistController_.mainSegmentLoader_.bandwidth;\n          var networkInformation = window$1.navigator.connection || window$1.navigator.mozConnection || window$1.navigator.webkitConnection;\n          var tenMbpsAsBitsPerSecond = 10e6;\n\n          if (this.options_.useNetworkInformationApi && networkInformation) {\n            // downlink returns Mbps\n            // https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink\n            var networkInfoBandwidthEstBitsPerSec = networkInformation.downlink * 1000 * 1000; // downlink maxes out at 10 Mbps. In the event that both networkInformationApi and the player\n            // estimate a bandwidth greater than 10 Mbps, use the larger of the two estimates to ensure that\n            // high quality streams are not filtered out.\n\n            if (networkInfoBandwidthEstBitsPerSec >= tenMbpsAsBitsPerSecond && playerBandwidthEst >= tenMbpsAsBitsPerSecond) {\n              playerBandwidthEst = Math.max(playerBandwidthEst, networkInfoBandwidthEstBitsPerSec);\n            } else {\n              playerBandwidthEst = networkInfoBandwidthEstBitsPerSec;\n            }\n          }\n\n          return playerBandwidthEst;\n        },\n        set: function set(bandwidth) {\n          this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter\n          // `count` is set to zero that current value of `rate` isn't included\n          // in the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput = {\n            rate: 0,\n            count: 0\n          };\n        }\n      },\n\n      /**\n       * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n       * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n       * the entire process after that - decryption, transmuxing, and appending - provided\n       * by `throughput`.\n       *\n       * Since the two process are serial, the overall system bandwidth is given by:\n       *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n       */\n      systemBandwidth: {\n        get: function get() {\n          var invBandwidth = 1 / (this.bandwidth || 1);\n          var invThroughput;\n\n          if (this.throughput > 0) {\n            invThroughput = 1 / this.throughput;\n          } else {\n            invThroughput = 0;\n          }\n\n          var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n          return systemBitrate;\n        },\n        set: function set() {\n          videojs.log.error('The \"systemBandwidth\" property is read-only');\n        }\n      }\n    });\n\n    if (this.options_.bandwidth) {\n      this.bandwidth = this.options_.bandwidth;\n    }\n\n    if (this.options_.throughput) {\n      this.throughput = this.options_.throughput;\n    }\n\n    Object.defineProperties(this.stats, {\n      bandwidth: {\n        get: function get() {\n          return _this3.bandwidth || 0;\n        },\n        enumerable: true\n      },\n      mediaRequests: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequests_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsAborted: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsTimedout: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsErrored: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0;\n        },\n        enumerable: true\n      },\n      mediaTransferDuration: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaTransferDuration_() || 0;\n        },\n        enumerable: true\n      },\n      mediaBytesTransferred: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0;\n        },\n        enumerable: true\n      },\n      mediaSecondsLoaded: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0;\n        },\n        enumerable: true\n      },\n      mediaAppends: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaAppends_() || 0;\n        },\n        enumerable: true\n      },\n      mainAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mainAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      audioAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.audioAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      appendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.appendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      timeToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.timeToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      buffered: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.buffered());\n        },\n        enumerable: true\n      },\n      currentTime: {\n        get: function get() {\n          return _this3.tech_.currentTime();\n        },\n        enumerable: true\n      },\n      currentSource: {\n        get: function get() {\n          return _this3.tech_.currentSource_;\n        },\n        enumerable: true\n      },\n      currentTech: {\n        get: function get() {\n          return _this3.tech_.name_;\n        },\n        enumerable: true\n      },\n      duration: {\n        get: function get() {\n          return _this3.tech_.duration();\n        },\n        enumerable: true\n      },\n      master: {\n        get: function get() {\n          return _this3.playlists.master;\n        },\n        enumerable: true\n      },\n      playerDimensions: {\n        get: function get() {\n          return _this3.tech_.currentDimensions();\n        },\n        enumerable: true\n      },\n      seekable: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.seekable());\n        },\n        enumerable: true\n      },\n      timestamp: {\n        get: function get() {\n          return Date.now();\n        },\n        enumerable: true\n      },\n      videoPlaybackQuality: {\n        get: function get() {\n          return _this3.tech_.getVideoPlaybackQuality();\n        },\n        enumerable: true\n      }\n    });\n    this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));\n    this.tech_.on('bandwidthupdate', function () {\n      if (_this3.options_.useBandwidthFromLocalStorage) {\n        updateVhsLocalStorage({\n          bandwidth: _this3.bandwidth,\n          throughput: Math.round(_this3.throughput)\n        });\n      }\n    });\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      // Add the manual rendition mix-in to VhsHandler\n      renditionSelectionMixin(_this3);\n    });\n    this.masterPlaylistController_.sourceUpdater_.on('createdsourcebuffers', function () {\n      _this3.setupEme_();\n    }); // the bandwidth of the primary segment loader is our best\n    // estimate of overall bandwidth\n\n    this.on(this.masterPlaylistController_, 'progress', function () {\n      this.tech_.trigger('progress');\n    }); // In the live case, we need to ignore the very first `seeking` event since\n    // that will be the result of the seek-to-live behavior\n\n    this.on(this.masterPlaylistController_, 'firstplay', function () {\n      this.ignoreNextSeekingEvent_ = true;\n    });\n    this.setupQualityLevels_(); // do nothing if the tech has been disposed already\n    // this can occur if someone sets the src in player.ready(), for instance\n\n    if (!this.tech_.el()) {\n      return;\n    }\n\n    this.mediaSourceUrl_ = window$1.URL.createObjectURL(this.masterPlaylistController_.mediaSource);\n    this.tech_.src(this.mediaSourceUrl_);\n  };\n\n  _proto.createKeySessions_ = function createKeySessions_() {\n    var _this4 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    this.logger_('waiting for EME key session creation');\n    waitForKeySessionCreation({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media(),\n      mainPlaylists: this.playlists.master.playlists\n    }).then(function () {\n      _this4.logger_('created EME key session');\n\n      _this4.masterPlaylistController_.sourceUpdater_.initializedEme();\n    }).catch(function (err) {\n      _this4.logger_('error while creating EME key session', err);\n\n      _this4.player_.error({\n        message: 'Failed to initialize media keys for EME',\n        code: 3\n      });\n    });\n  };\n\n  _proto.handleWaitingForKey_ = function handleWaitingForKey_() {\n    // If waitingforkey is fired, it's possible that the data that's necessary to retrieve\n    // the key is in the manifest. While this should've happened on initial source load, it\n    // may happen again in live streams where the keys change, and the manifest info\n    // reflects the update.\n    //\n    // Because videojs-contrib-eme compares the PSSH data we send to that of PSSH data it's\n    // already requested keys for, we don't have to worry about this generating extraneous\n    // requests.\n    this.logger_('waitingforkey fired, attempting to create any new key sessions');\n    this.createKeySessions_();\n  }\n  /**\n   * If necessary and EME is available, sets up EME options and waits for key session\n   * creation.\n   *\n   * This function also updates the source updater so taht it can be used, as for some\n   * browsers, EME must be configured before content is appended (if appending unencrypted\n   * content before encrypted content).\n   */\n  ;\n\n  _proto.setupEme_ = function setupEme_() {\n    var _this5 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    var didSetupEmeOptions = setupEmeOptions({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      media: this.playlists.media(),\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media()\n    });\n    this.player_.tech_.on('keystatuschange', function (e) {\n      if (e.status !== 'output-restricted') {\n        return;\n      }\n\n      var masterPlaylist = _this5.masterPlaylistController_.master();\n\n      if (!masterPlaylist || !masterPlaylist.playlists) {\n        return;\n      }\n\n      var excludedHDPlaylists = []; // Assume all HD streams are unplayable and exclude them from ABR selection\n\n      masterPlaylist.playlists.forEach(function (playlist) {\n        if (playlist && playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height >= 720) {\n          if (!playlist.excludeUntil || playlist.excludeUntil < Infinity) {\n            playlist.excludeUntil = Infinity;\n            excludedHDPlaylists.push(playlist);\n          }\n        }\n      });\n\n      if (excludedHDPlaylists.length) {\n        var _videojs$log;\n\n        (_videojs$log = videojs.log).warn.apply(_videojs$log, ['DRM keystatus changed to \"output-restricted.\" Removing the following HD playlists ' + 'that will most likely fail to play and clearing the buffer. ' + 'This may be due to HDCP restrictions on the stream and the capabilities of the current device.'].concat(excludedHDPlaylists)); // Clear the buffer before switching playlists, since it may already contain unplayable segments\n\n\n        _this5.masterPlaylistController_.fastQualityChange_();\n      }\n    });\n    this.handleWaitingForKey_ = this.handleWaitingForKey_.bind(this);\n    this.player_.tech_.on('waitingforkey', this.handleWaitingForKey_); // In IE11 this is too early to initialize media keys, and IE11 does not support\n    // promises.\n\n    if (videojs.browser.IE_VERSION === 11 || !didSetupEmeOptions) {\n      // If EME options were not set up, we've done all we could to initialize EME.\n      this.masterPlaylistController_.sourceUpdater_.initializedEme();\n      return;\n    }\n\n    this.createKeySessions_();\n  }\n  /**\n   * Initializes the quality levels and sets listeners to update them.\n   *\n   * @method setupQualityLevels_\n   * @private\n   */\n  ;\n\n  _proto.setupQualityLevels_ = function setupQualityLevels_() {\n    var _this6 = this;\n\n    var player = videojs.players[this.tech_.options_.playerId]; // if there isn't a player or there isn't a qualityLevels plugin\n    // or qualityLevels_ listeners have already been setup, do nothing.\n\n    if (!player || !player.qualityLevels || this.qualityLevels_) {\n      return;\n    }\n\n    this.qualityLevels_ = player.qualityLevels();\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      handleVhsLoadedMetadata(_this6.qualityLevels_, _this6);\n    });\n    this.playlists.on('mediachange', function () {\n      handleVhsMediaChange(_this6.qualityLevels_, _this6.playlists);\n    });\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  VhsHandler.version = function version$5() {\n    return {\n      '@videojs/http-streaming': version$4,\n      'mux.js': version$3,\n      'mpd-parser': version$2,\n      'm3u8-parser': version$1,\n      'aes-decrypter': version\n    };\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  _proto.version = function version() {\n    return this.constructor.version();\n  };\n\n  _proto.canChangeType = function canChangeType() {\n    return SourceUpdater.canChangeType();\n  }\n  /**\n   * Begin playing the video.\n   */\n  ;\n\n  _proto.play = function play() {\n    this.masterPlaylistController_.play();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    this.masterPlaylistController_.setCurrentTime(currentTime);\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.duration = function duration() {\n    return this.masterPlaylistController_.duration();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.masterPlaylistController_.seekable();\n  }\n  /**\n   * Abort all outstanding work and cleanup.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.playbackWatcher_) {\n      this.playbackWatcher_.dispose();\n    }\n\n    if (this.masterPlaylistController_) {\n      this.masterPlaylistController_.dispose();\n    }\n\n    if (this.qualityLevels_) {\n      this.qualityLevels_.dispose();\n    }\n\n    if (this.player_) {\n      delete this.player_.vhs;\n      delete this.player_.dash;\n      delete this.player_.hls;\n    }\n\n    if (this.tech_ && this.tech_.vhs) {\n      delete this.tech_.vhs;\n    } // don't check this.tech_.hls as it will log a deprecated warning\n\n\n    if (this.tech_) {\n      delete this.tech_.hls;\n    }\n\n    if (this.mediaSourceUrl_ && window$1.URL.revokeObjectURL) {\n      window$1.URL.revokeObjectURL(this.mediaSourceUrl_);\n      this.mediaSourceUrl_ = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.off('waitingforkey', this.handleWaitingForKey_);\n    }\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  _proto.convertToProgramTime = function convertToProgramTime(time, callback) {\n    return getProgramTime({\n      playlist: this.masterPlaylistController_.media(),\n      time: time,\n      callback: callback\n    });\n  } // the player must be playing before calling this\n  ;\n\n  _proto.seekToProgramTime = function seekToProgramTime$1(programTime, callback, pauseAfterSeek, retryCount) {\n    if (pauseAfterSeek === void 0) {\n      pauseAfterSeek = true;\n    }\n\n    if (retryCount === void 0) {\n      retryCount = 2;\n    }\n\n    return seekToProgramTime({\n      programTime: programTime,\n      playlist: this.masterPlaylistController_.media(),\n      retryCount: retryCount,\n      pauseAfterSeek: pauseAfterSeek,\n      seekTo: this.options_.seekTo,\n      tech: this.options_.tech,\n      callback: callback\n    });\n  };\n\n  return VhsHandler;\n}(Component);\n/**\n * The Source Handler object, which informs video.js what additional\n * MIME types are supported and sets up playback. It is registered\n * automatically to the appropriate tech based on the capabilities of\n * the browser it is running in. It is not necessary to use or modify\n * this object in normal usage.\n */\n\n\nvar VhsSourceHandler = {\n  name: 'videojs-http-streaming',\n  VERSION: version$4,\n  canHandleSource: function canHandleSource(srcObj, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    return VhsSourceHandler.canPlayType(srcObj.type, localOptions);\n  },\n  handleSource: function handleSource(source, tech, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    tech.vhs = new VhsHandler(source, tech, localOptions);\n\n    if (!videojs.hasOwnProperty('hls')) {\n      Object.defineProperty(tech, 'hls', {\n        get: function get() {\n          videojs.log.warn('player.tech().hls is deprecated. Use player.tech().vhs instead.');\n          return tech.vhs;\n        },\n        configurable: true\n      });\n    }\n\n    tech.vhs.xhr = xhrFactory();\n    tech.vhs.src(source.src, source.type);\n    return tech.vhs;\n  },\n  canPlayType: function canPlayType(type, options) {\n    var simpleType = simpleTypeFromSourceType(type);\n\n    if (!simpleType) {\n      return '';\n    }\n\n    var overrideNative = VhsSourceHandler.getOverrideNative(options);\n    var supportsTypeNatively = Vhs.supportsTypeNatively(simpleType);\n    var canUseMsePlayback = !supportsTypeNatively || overrideNative;\n    return canUseMsePlayback ? 'maybe' : '';\n  },\n  getOverrideNative: function getOverrideNative(options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var _options = options,\n        _options$vhs = _options.vhs,\n        vhs = _options$vhs === void 0 ? {} : _options$vhs,\n        _options$hls = _options.hls,\n        hls = _options$hls === void 0 ? {} : _options$hls;\n    var defaultOverrideNative = !(videojs.browser.IS_ANY_SAFARI || videojs.browser.IS_IOS);\n    var _vhs$overrideNative = vhs.overrideNative,\n        overrideNative = _vhs$overrideNative === void 0 ? defaultOverrideNative : _vhs$overrideNative;\n    var _hls$overrideNative = hls.overrideNative,\n        legacyOverrideNative = _hls$overrideNative === void 0 ? false : _hls$overrideNative;\n    return legacyOverrideNative || overrideNative;\n  }\n};\n/**\n * Check to see if the native MediaSource object exists and supports\n * an MP4 container with both H.264 video and AAC-LC audio.\n *\n * @return {boolean} if  native media sources are supported\n */\n\nvar supportsNativeMediaSources = function supportsNativeMediaSources() {\n  return browserSupportsCodec('avc1.4d400d,mp4a.40.2');\n}; // register source handlers with the appropriate techs\n\n\nif (supportsNativeMediaSources()) {\n  videojs.getTech('Html5').registerSourceHandler(VhsSourceHandler, 0);\n}\n\nvideojs.VhsHandler = VhsHandler;\nObject.defineProperty(videojs, 'HlsHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsHandler is deprecated. Use videojs.VhsHandler instead.');\n    return VhsHandler;\n  },\n  configurable: true\n});\nvideojs.VhsSourceHandler = VhsSourceHandler;\nObject.defineProperty(videojs, 'HlsSourceHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsSourceHandler is deprecated. ' + 'Use videojs.VhsSourceHandler instead.');\n    return VhsSourceHandler;\n  },\n  configurable: true\n});\nvideojs.Vhs = Vhs;\nObject.defineProperty(videojs, 'Hls', {\n  get: function get() {\n    videojs.log.warn('videojs.Hls is deprecated. Use videojs.Vhs instead.');\n    return Vhs;\n  },\n  configurable: true\n});\n\nif (!videojs.use) {\n  videojs.registerComponent('Hls', Vhs);\n  videojs.registerComponent('Vhs', Vhs);\n}\n\nvideojs.options.vhs = videojs.options.vhs || {};\nvideojs.options.hls = videojs.options.hls || {};\n\nif (!videojs.getPlugin || !videojs.getPlugin('reloadSourceOnError')) {\n  var registerPlugin = videojs.registerPlugin || videojs.plugin;\n  registerPlugin('reloadSourceOnError', reloadSourceOnError);\n}\n\nexport { LOCAL_STORAGE_KEY, Vhs, VhsHandler, VhsSourceHandler, emeKeySystems, expandDataUri, getAllPsshKeySystemsOptions, setupEmeOptions, waitForKeySessionCreation };\n","'use strict';\n\nmodule.exports = {\n  H264_STREAM_TYPE: 0x1B,\n  ADTS_STREAM_TYPE: 0x0F,\n  METADATA_STREAM_TYPE: 0x15\n};\n","import URLToolkit from 'url-toolkit';\nimport window from 'global/window';\nvar DEFAULT_LOCATION = 'http://example.com';\n\nvar resolveUrl = function resolveUrl(baseUrl, relativeUrl) {\n  // return early if we don't need to resolve\n  if (/^[a-z]+:/i.test(relativeUrl)) {\n    return relativeUrl;\n  } // if baseUrl is a data URI, ignore it and resolve everything relative to window.location\n\n\n  if (/^data:/.test(baseUrl)) {\n    baseUrl = window.location && window.location.href || '';\n  } // IE11 supports URL but not the URL constructor\n  // feature detect the behavior we want\n\n\n  var nativeURL = typeof window.URL === 'function';\n  var protocolLess = /^\\/\\//.test(baseUrl); // remove location if window.location isn't available (i.e. we're in node)\n  // and if baseUrl isn't an absolute url\n\n  var removeLocation = !window.location && !/\\/\\//i.test(baseUrl); // if the base URL is relative then combine with the current location\n\n  if (nativeURL) {\n    baseUrl = new window.URL(baseUrl, window.location || DEFAULT_LOCATION);\n  } else if (!/\\/\\//i.test(baseUrl)) {\n    baseUrl = URLToolkit.buildAbsoluteURL(window.location && window.location.href || '', baseUrl);\n  }\n\n  if (nativeURL) {\n    var newUrl = new URL(relativeUrl, baseUrl); // if we're a protocol-less url, remove the protocol\n    // and if we're location-less, remove the location\n    // otherwise, return the url unmodified\n\n    if (removeLocation) {\n      return newUrl.href.slice(DEFAULT_LOCATION.length);\n    } else if (protocolLess) {\n      return newUrl.href.slice(newUrl.protocol.length);\n    }\n\n    return newUrl.href;\n  }\n\n  return URLToolkit.buildAbsoluteURL(baseUrl, relativeUrl);\n};\n\nexport default resolveUrl;","var Buffer = require('safe-buffer').Buffer\nvar Transform = require('stream').Transform\nvar StringDecoder = require('string_decoder').StringDecoder\nvar inherits = require('inherits')\n\nfunction CipherBase (hashMode) {\n  Transform.call(this)\n  this.hashMode = typeof hashMode === 'string'\n  if (this.hashMode) {\n    this[hashMode] = this._finalOrDigest\n  } else {\n    this.final = this._finalOrDigest\n  }\n  if (this._final) {\n    this.__final = this._final\n    this._final = null\n  }\n  this._decoder = null\n  this._encoding = null\n}\ninherits(CipherBase, Transform)\n\nCipherBase.prototype.update = function (data, inputEnc, outputEnc) {\n  if (typeof data === 'string') {\n    data = Buffer.from(data, inputEnc)\n  }\n\n  var outData = this._update(data)\n  if (this.hashMode) return this\n\n  if (outputEnc) {\n    outData = this._toString(outData, outputEnc)\n  }\n\n  return outData\n}\n\nCipherBase.prototype.setAutoPadding = function () {}\nCipherBase.prototype.getAuthTag = function () {\n  throw new Error('trying to get auth tag in unsupported state')\n}\n\nCipherBase.prototype.setAuthTag = function () {\n  throw new Error('trying to set auth tag in unsupported state')\n}\n\nCipherBase.prototype.setAAD = function () {\n  throw new Error('trying to set aad in unsupported state')\n}\n\nCipherBase.prototype._transform = function (data, _, next) {\n  var err\n  try {\n    if (this.hashMode) {\n      this._update(data)\n    } else {\n      this.push(this._update(data))\n    }\n  } catch (e) {\n    err = e\n  } finally {\n    next(err)\n  }\n}\nCipherBase.prototype._flush = function (done) {\n  var err\n  try {\n    this.push(this.__final())\n  } catch (e) {\n    err = e\n  }\n\n  done(err)\n}\nCipherBase.prototype._finalOrDigest = function (outputEnc) {\n  var outData = this.__final() || Buffer.alloc(0)\n  if (outputEnc) {\n    outData = this._toString(outData, outputEnc, true)\n  }\n  return outData\n}\n\nCipherBase.prototype._toString = function (value, enc, fin) {\n  if (!this._decoder) {\n    this._decoder = new StringDecoder(enc)\n    this._encoding = enc\n  }\n\n  if (this._encoding !== enc) throw new Error('can\\'t switch encodings')\n\n  var out = this._decoder.write(value)\n  if (fin) {\n    out += this._decoder.end()\n  }\n\n  return out\n}\n\nmodule.exports = CipherBase\n","exports.publicEncrypt = require('./publicEncrypt')\nexports.privateDecrypt = require('./privateDecrypt')\n\nexports.privateEncrypt = function privateEncrypt (key, buf) {\n  return exports.publicEncrypt(key, buf, true)\n}\n\nexports.publicDecrypt = function publicDecrypt (key, buf) {\n  return exports.privateDecrypt(key, buf, true)\n}\n","var trim = function(string) {\n  return string.replace(/^\\s+|\\s+$/g, '');\n}\n  , isArray = function(arg) {\n      return Object.prototype.toString.call(arg) === '[object Array]';\n    }\n\nmodule.exports = function (headers) {\n  if (!headers)\n    return {}\n\n  var result = {}\n\n  var headersArr = trim(headers).split('\\n')\n\n  for (var i = 0; i < headersArr.length; i++) {\n    var row = headersArr[i]\n    var index = row.indexOf(':')\n    , key = trim(row.slice(0, index)).toLowerCase()\n    , value = trim(row.slice(index + 1))\n\n    if (typeof(result[key]) === 'undefined') {\n      result[key] = value\n    } else if (isArray(result[key])) {\n      result[key].push(value)\n    } else {\n      result[key] = [ result[key], value ]\n    }\n  }\n\n  return result\n}\n","'use strict';\n\nmodule.exports = {\n  H264_STREAM_TYPE: 0x1B,\n  ADTS_STREAM_TYPE: 0x0F,\n  METADATA_STREAM_TYPE: 0x15\n};\n","var toInteger = require('../internals/to-integer');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `String.prototype.{ codePointAt, at }` methods implementation\nvar createMethod = function (CONVERT_TO_STRING) {\n  return function ($this, pos) {\n    var S = String(requireObjectCoercible($this));\n    var position = toInteger(pos);\n    var size = S.length;\n    var first, second;\n    if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;\n    first = S.charCodeAt(position);\n    return first < 0xD800 || first > 0xDBFF || position + 1 === size\n      || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF\n        ? CONVERT_TO_STRING ? S.charAt(position) : first\n        : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;\n  };\n};\n\nmodule.exports = {\n  // `String.prototype.codePointAt` method\n  // https://tc39.es/ecma262/#sec-string.prototype.codepointat\n  codeAt: createMethod(false),\n  // `String.prototype.at` method\n  // https://github.com/mathiasbynens/String.prototype.at\n  charAt: createMethod(true)\n};\n","'use strict';\nvar defineProperty = require('../internals/object-define-property').f;\nvar create = require('../internals/object-create');\nvar redefineAll = require('../internals/redefine-all');\nvar bind = require('../internals/function-bind-context');\nvar anInstance = require('../internals/an-instance');\nvar iterate = require('../internals/iterate');\nvar defineIterator = require('../internals/define-iterator');\nvar setSpecies = require('../internals/set-species');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar fastKey = require('../internals/internal-metadata').fastKey;\nvar InternalStateModule = require('../internals/internal-state');\n\nvar setInternalState = InternalStateModule.set;\nvar internalStateGetterFor = InternalStateModule.getterFor;\n\nmodule.exports = {\n  getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {\n    var C = wrapper(function (that, iterable) {\n      anInstance(that, C, CONSTRUCTOR_NAME);\n      setInternalState(that, {\n        type: CONSTRUCTOR_NAME,\n        index: create(null),\n        first: undefined,\n        last: undefined,\n        size: 0\n      });\n      if (!DESCRIPTORS) that.size = 0;\n      if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });\n    });\n\n    var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);\n\n    var define = function (that, key, value) {\n      var state = getInternalState(that);\n      var entry = getEntry(that, key);\n      var previous, index;\n      // change existing entry\n      if (entry) {\n        entry.value = value;\n      // create new entry\n      } else {\n        state.last = entry = {\n          index: index = fastKey(key, true),\n          key: key,\n          value: value,\n          previous: previous = state.last,\n          next: undefined,\n          removed: false\n        };\n        if (!state.first) state.first = entry;\n        if (previous) previous.next = entry;\n        if (DESCRIPTORS) state.size++;\n        else that.size++;\n        // add to index\n        if (index !== 'F') state.index[index] = entry;\n      } return that;\n    };\n\n    var getEntry = function (that, key) {\n      var state = getInternalState(that);\n      // fast case\n      var index = fastKey(key);\n      var entry;\n      if (index !== 'F') return state.index[index];\n      // frozen object case\n      for (entry = state.first; entry; entry = entry.next) {\n        if (entry.key == key) return entry;\n      }\n    };\n\n    redefineAll(C.prototype, {\n      // 23.1.3.1 Map.prototype.clear()\n      // 23.2.3.2 Set.prototype.clear()\n      clear: function clear() {\n        var that = this;\n        var state = getInternalState(that);\n        var data = state.index;\n        var entry = state.first;\n        while (entry) {\n          entry.removed = true;\n          if (entry.previous) entry.previous = entry.previous.next = undefined;\n          delete data[entry.index];\n          entry = entry.next;\n        }\n        state.first = state.last = undefined;\n        if (DESCRIPTORS) state.size = 0;\n        else that.size = 0;\n      },\n      // 23.1.3.3 Map.prototype.delete(key)\n      // 23.2.3.4 Set.prototype.delete(value)\n      'delete': function (key) {\n        var that = this;\n        var state = getInternalState(that);\n        var entry = getEntry(that, key);\n        if (entry) {\n          var next = entry.next;\n          var prev = entry.previous;\n          delete state.index[entry.index];\n          entry.removed = true;\n          if (prev) prev.next = next;\n          if (next) next.previous = prev;\n          if (state.first == entry) state.first = next;\n          if (state.last == entry) state.last = prev;\n          if (DESCRIPTORS) state.size--;\n          else that.size--;\n        } return !!entry;\n      },\n      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)\n      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)\n      forEach: function forEach(callbackfn /* , that = undefined */) {\n        var state = getInternalState(this);\n        var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);\n        var entry;\n        while (entry = entry ? entry.next : state.first) {\n          boundFunction(entry.value, entry.key, this);\n          // revert to the last existing entry\n          while (entry && entry.removed) entry = entry.previous;\n        }\n      },\n      // 23.1.3.7 Map.prototype.has(key)\n      // 23.2.3.7 Set.prototype.has(value)\n      has: function has(key) {\n        return !!getEntry(this, key);\n      }\n    });\n\n    redefineAll(C.prototype, IS_MAP ? {\n      // 23.1.3.6 Map.prototype.get(key)\n      get: function get(key) {\n        var entry = getEntry(this, key);\n        return entry && entry.value;\n      },\n      // 23.1.3.9 Map.prototype.set(key, value)\n      set: function set(key, value) {\n        return define(this, key === 0 ? 0 : key, value);\n      }\n    } : {\n      // 23.2.3.1 Set.prototype.add(value)\n      add: function add(value) {\n        return define(this, value = value === 0 ? 0 : value, value);\n      }\n    });\n    if (DESCRIPTORS) defineProperty(C.prototype, 'size', {\n      get: function () {\n        return getInternalState(this).size;\n      }\n    });\n    return C;\n  },\n  setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {\n    var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';\n    var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);\n    var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);\n    // add .keys, .values, .entries, [@@iterator]\n    // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11\n    defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {\n      setInternalState(this, {\n        type: ITERATOR_NAME,\n        target: iterated,\n        state: getInternalCollectionState(iterated),\n        kind: kind,\n        last: undefined\n      });\n    }, function () {\n      var state = getInternalIteratorState(this);\n      var kind = state.kind;\n      var entry = state.last;\n      // revert to the last existing entry\n      while (entry && entry.removed) entry = entry.previous;\n      // get next entry\n      if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {\n        // or finish the iteration\n        state.target = undefined;\n        return { value: undefined, done: true };\n      }\n      // return step by kind\n      if (kind == 'keys') return { value: entry.key, done: false };\n      if (kind == 'values') return { value: entry.value, done: false };\n      return { value: [entry.key, entry.value], done: false };\n    }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);\n\n    // add [@@species], 23.1.2.2, 23.2.2.2\n    setSpecies(CONSTRUCTOR_NAME);\n  }\n};\n","var isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar SPECIES = wellKnownSymbol('species');\n\n// `ArraySpeciesCreate` abstract operation\n// https://tc39.es/ecma262/#sec-arrayspeciescreate\nmodule.exports = function (originalArray, length) {\n  var C;\n  if (isArray(originalArray)) {\n    C = originalArray.constructor;\n    // cross-realm fallback\n    if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;\n    else if (isObject(C)) {\n      C = C[SPECIES];\n      if (C === null) C = undefined;\n    }\n  } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);\n};\n","/**\n * @file flash-source-buffer.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _muxJsLibFlv = require('mux.js/lib/flv');\n\nvar _muxJsLibFlv2 = _interopRequireDefault(_muxJsLibFlv);\n\nvar _removeCuesFromTrack = require('./remove-cues-from-track');\n\nvar _removeCuesFromTrack2 = _interopRequireDefault(_removeCuesFromTrack);\n\nvar _createTextTracksIfNecessary = require('./create-text-tracks-if-necessary');\n\nvar _createTextTracksIfNecessary2 = _interopRequireDefault(_createTextTracksIfNecessary);\n\nvar _addTextTrackData = require('./add-text-track-data');\n\nvar _flashTransmuxerWorker = require('./flash-transmuxer-worker');\n\nvar _flashTransmuxerWorker2 = _interopRequireDefault(_flashTransmuxerWorker);\n\nvar _webwackify = require('webwackify');\n\nvar _webwackify2 = _interopRequireDefault(_webwackify);\n\nvar _flashConstants = require('./flash-constants');\n\nvar _flashConstants2 = _interopRequireDefault(_flashConstants);\n\nvar resolveFlashTransmuxWorker = function resolveFlashTransmuxWorker() {\n  var result = undefined;\n\n  try {\n    result = require.resolve('./flash-transmuxer-worker');\n  } catch (e) {\n    // no result\n  }\n\n  return result;\n};\n\n/**\n * A wrapper around the setTimeout function that uses\n * the flash constant time between ticks value.\n *\n * @param {Function} func the function callback to run\n * @private\n */\nvar scheduleTick = function scheduleTick(func) {\n  // Chrome doesn't invoke requestAnimationFrame callbacks\n  // in background tabs, so use setTimeout.\n  _globalWindow2['default'].setTimeout(func, _flashConstants2['default'].TIME_BETWEEN_CHUNKS);\n};\n\n/**\n * Generates a random string of max length 6\n *\n * @return {String} the randomly generated string\n * @function generateRandomString\n * @private\n */\nvar generateRandomString = function generateRandomString() {\n  return Math.random().toString(36).slice(2, 8);\n};\n\n/**\n * Round a number to a specified number of places much like\n * toFixed but return a number instead of a string representation.\n *\n * @param {Number} num A number\n * @param {Number} places The number of decimal places which to\n * round\n * @private\n */\nvar toDecimalPlaces = function toDecimalPlaces(num, places) {\n  if (typeof places !== 'number' || places < 0) {\n    places = 0;\n  }\n\n  var scale = Math.pow(10, places);\n\n  return Math.round(num * scale) / scale;\n};\n\n/**\n * A SourceBuffer implementation for Flash rather than HTML.\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource\n * @param {Object} mediaSource the flash media source\n * @class FlashSourceBuffer\n * @extends videojs.EventTarget\n */\n\nvar FlashSourceBuffer = (function (_videojs$EventTarget) {\n  _inherits(FlashSourceBuffer, _videojs$EventTarget);\n\n  function FlashSourceBuffer(mediaSource) {\n    var _this = this;\n\n    _classCallCheck(this, FlashSourceBuffer);\n\n    _get(Object.getPrototypeOf(FlashSourceBuffer.prototype), 'constructor', this).call(this);\n    var encodedHeader = undefined;\n\n    // Start off using the globally defined value but refine\n    // as we append data into flash\n    this.chunkSize_ = _flashConstants2['default'].BYTES_PER_CHUNK;\n\n    // byte arrays queued to be appended\n    this.buffer_ = [];\n\n    // the total number of queued bytes\n    this.bufferSize_ = 0;\n\n    // to be able to determine the correct position to seek to, we\n    // need to retain information about the mapping between the\n    // media timeline and PTS values\n    this.basePtsOffset_ = NaN;\n\n    this.mediaSource_ = mediaSource;\n\n    this.audioBufferEnd_ = NaN;\n    this.videoBufferEnd_ = NaN;\n\n    // indicates whether the asynchronous continuation of an operation\n    // is still being processed\n    // see https://w3c.github.io/media-source/#widl-SourceBuffer-updating\n    this.updating = false;\n    this.timestampOffset_ = 0;\n\n    encodedHeader = _globalWindow2['default'].btoa(String.fromCharCode.apply(null, Array.prototype.slice.call(_muxJsLibFlv2['default'].getFlvHeader())));\n\n    // create function names with added randomness for the global callbacks flash will use\n    // to get data from javascript into the swf. Random strings are added as a safety\n    // measure for pages with multiple players since these functions will be global\n    // instead of per instance. When making a call to the swf, the browser generates a\n    // try catch code snippet, but just takes the function name and writes out an unquoted\n    // call to that function. If the player id has any special characters, this will result\n    // in an error, so safePlayerId replaces all special characters to '_'\n    var safePlayerId = this.mediaSource_.player_.id().replace(/[^a-zA-Z0-9]/g, '_');\n\n    this.flashEncodedHeaderName_ = 'vjs_flashEncodedHeader_' + safePlayerId + generateRandomString();\n    this.flashEncodedDataName_ = 'vjs_flashEncodedData_' + safePlayerId + generateRandomString();\n\n    _globalWindow2['default'][this.flashEncodedHeaderName_] = function () {\n      delete _globalWindow2['default'][_this.flashEncodedHeaderName_];\n      return encodedHeader;\n    };\n\n    this.mediaSource_.swfObj.vjs_appendChunkReady(this.flashEncodedHeaderName_);\n\n    this.transmuxer_ = (0, _webwackify2['default'])(_flashTransmuxerWorker2['default'], resolveFlashTransmuxWorker());\n    this.transmuxer_.postMessage({ action: 'init', options: {} });\n    this.transmuxer_.onmessage = function (event) {\n      if (event.data.action === 'data') {\n        _this.receiveBuffer_(event.data.segment);\n      }\n    };\n\n    this.one('updateend', function () {\n      _this.mediaSource_.tech_.trigger('loadedmetadata');\n    });\n\n    Object.defineProperty(this, 'timestampOffset', {\n      get: function get() {\n        return this.timestampOffset_;\n      },\n      set: function set(val) {\n        if (typeof val === 'number' && val >= 0) {\n          this.timestampOffset_ = val;\n          // We have to tell flash to expect a discontinuity\n          this.mediaSource_.swfObj.vjs_discontinuity();\n          // the media <-> PTS mapping must be re-established after\n          // the discontinuity\n          this.basePtsOffset_ = NaN;\n          this.audioBufferEnd_ = NaN;\n          this.videoBufferEnd_ = NaN;\n\n          this.transmuxer_.postMessage({ action: 'reset' });\n        }\n      }\n    });\n\n    Object.defineProperty(this, 'buffered', {\n      get: function get() {\n        if (!this.mediaSource_ || !this.mediaSource_.swfObj || !('vjs_getProperty' in this.mediaSource_.swfObj)) {\n          return _videoJs2['default'].createTimeRange();\n        }\n\n        var buffered = this.mediaSource_.swfObj.vjs_getProperty('buffered');\n\n        if (buffered && buffered.length) {\n          buffered[0][0] = toDecimalPlaces(buffered[0][0], 3);\n          buffered[0][1] = toDecimalPlaces(buffered[0][1], 3);\n        }\n        return _videoJs2['default'].createTimeRanges(buffered);\n      }\n    });\n\n    // On a seek we remove all text track data since flash has no concept\n    // of a buffered-range and everything else is reset on seek\n    this.mediaSource_.player_.on('seeked', function () {\n      (0, _removeCuesFromTrack2['default'])(0, Infinity, _this.metadataTrack_);\n      if (_this.inbandTextTracks_) {\n        for (var track in _this.inbandTextTracks_) {\n          (0, _removeCuesFromTrack2['default'])(0, Infinity, _this.inbandTextTracks_[track]);\n        }\n      }\n    });\n\n    var onHlsReset = this.onHlsReset_.bind(this);\n\n    // hls-reset is fired by videojs.Hls on to the tech after the main SegmentLoader\n    // resets its state and flushes the buffer\n    this.mediaSource_.player_.tech_.on('hls-reset', onHlsReset);\n\n    this.mediaSource_.player_.tech_.hls.on('dispose', function () {\n      _this.transmuxer_.terminate();\n      _this.mediaSource_.player_.tech_.off('hls-reset', onHlsReset);\n    });\n  }\n\n  /**\n   * Append bytes to the sourcebuffers buffer, in this case we\n   * have to append it to swf object.\n   *\n   * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/appendBuffer\n   * @param {Array} bytes\n   */\n\n  _createClass(FlashSourceBuffer, [{\n    key: 'appendBuffer',\n    value: function appendBuffer(bytes) {\n      var error = undefined;\n\n      if (this.updating) {\n        error = new Error('SourceBuffer.append() cannot be called ' + 'while an update is in progress');\n        error.name = 'InvalidStateError';\n        error.code = 11;\n        throw error;\n      }\n      this.updating = true;\n      this.mediaSource_.readyState = 'open';\n      this.trigger({ type: 'update' });\n\n      this.transmuxer_.postMessage({\n        action: 'push',\n        data: bytes.buffer,\n        byteOffset: bytes.byteOffset,\n        byteLength: bytes.byteLength\n      }, [bytes.buffer]);\n      this.transmuxer_.postMessage({ action: 'flush' });\n    }\n\n    /**\n     * Reset the parser and remove any data queued to be sent to the SWF.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/abort\n     */\n  }, {\n    key: 'abort',\n    value: function abort() {\n      this.buffer_ = [];\n      this.bufferSize_ = 0;\n      this.mediaSource_.swfObj.vjs_abort();\n\n      // report any outstanding updates have ended\n      if (this.updating) {\n        this.updating = false;\n        this.trigger({ type: 'updateend' });\n      }\n    }\n\n    /**\n     * Flash cannot remove ranges already buffered in the NetStream\n     * but seeking clears the buffer entirely. For most purposes,\n     * having this operation act as a no-op is acceptable.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/remove\n     * @param {Double} start start of the section to remove\n     * @param {Double} end end of the section to remove\n     */\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      (0, _removeCuesFromTrack2['default'])(start, end, this.metadataTrack_);\n      if (this.inbandTextTracks_) {\n        for (var track in this.inbandTextTracks_) {\n          (0, _removeCuesFromTrack2['default'])(start, end, this.inbandTextTracks_[track]);\n        }\n      }\n      this.trigger({ type: 'update' });\n      this.trigger({ type: 'updateend' });\n    }\n\n    /**\n     * Receive a buffer from the flv.\n     *\n     * @param {Object} segment\n     * @private\n     */\n  }, {\n    key: 'receiveBuffer_',\n    value: function receiveBuffer_(segment) {\n      var _this2 = this;\n\n      // create an in-band caption track if one is present in the segment\n      (0, _createTextTracksIfNecessary2['default'])(this, this.mediaSource_, segment);\n      (0, _addTextTrackData.addTextTrackData)(this, segment.captions, segment.metadata);\n\n      // Do this asynchronously since convertTagsToData_ can be time consuming\n      scheduleTick(function () {\n        var flvBytes = _this2.convertTagsToData_(segment);\n\n        if (_this2.buffer_.length === 0) {\n          scheduleTick(_this2.processBuffer_.bind(_this2));\n        }\n\n        if (flvBytes) {\n          _this2.buffer_.push(flvBytes);\n          _this2.bufferSize_ += flvBytes.byteLength;\n        }\n      });\n    }\n\n    /**\n     * Append a portion of the current buffer to the SWF.\n     *\n     * @private\n     */\n  }, {\n    key: 'processBuffer_',\n    value: function processBuffer_() {\n      var _this3 = this;\n\n      var chunkSize = _flashConstants2['default'].BYTES_PER_CHUNK;\n\n      if (!this.buffer_.length) {\n        if (this.updating !== false) {\n          this.updating = false;\n          this.trigger({ type: 'updateend' });\n        }\n        // do nothing if the buffer is empty\n        return;\n      }\n\n      // concatenate appends up to the max append size\n      var chunk = this.buffer_[0].subarray(0, chunkSize);\n\n      // requeue any bytes that won't make it this round\n      if (chunk.byteLength < chunkSize || this.buffer_[0].byteLength === chunkSize) {\n        this.buffer_.shift();\n      } else {\n        this.buffer_[0] = this.buffer_[0].subarray(chunkSize);\n      }\n\n      this.bufferSize_ -= chunk.byteLength;\n\n      // base64 encode the bytes\n      var binary = [];\n      var length = chunk.byteLength;\n\n      for (var i = 0; i < length; i++) {\n        binary.push(String.fromCharCode(chunk[i]));\n      }\n      var b64str = _globalWindow2['default'].btoa(binary.join(''));\n\n      _globalWindow2['default'][this.flashEncodedDataName_] = function () {\n        // schedule another processBuffer to process any left over data or to\n        // trigger updateend\n        scheduleTick(_this3.processBuffer_.bind(_this3));\n        delete _globalWindow2['default'][_this3.flashEncodedDataName_];\n        return b64str;\n      };\n\n      // Notify the swf that segment data is ready to be appended\n      this.mediaSource_.swfObj.vjs_appendChunkReady(this.flashEncodedDataName_);\n    }\n\n    /**\n     * Turns an array of flv tags into a Uint8Array representing the\n     * flv data. Also removes any tags that are before the current\n     * time so that playback begins at or slightly after the right\n     * place on a seek\n     *\n     * @private\n     * @param {Object} segmentData object of segment data\n     */\n  }, {\n    key: 'convertTagsToData_',\n    value: function convertTagsToData_(segmentData) {\n      var segmentByteLength = 0;\n      var tech = this.mediaSource_.tech_;\n      var videoTargetPts = 0;\n      var segment = undefined;\n      var videoTags = segmentData.tags.videoTags;\n      var audioTags = segmentData.tags.audioTags;\n\n      // Establish the media timeline to PTS translation if we don't\n      // have one already\n      if (isNaN(this.basePtsOffset_) && (videoTags.length || audioTags.length)) {\n        // We know there is at least one video or audio tag, but since we may not have both,\n        // we use pts: Infinity for the missing tag. The will force the following Math.min\n        // call will to use the proper pts value since it will always be less than Infinity\n        var firstVideoTag = videoTags[0] || { pts: Infinity };\n        var firstAudioTag = audioTags[0] || { pts: Infinity };\n\n        this.basePtsOffset_ = Math.min(firstAudioTag.pts, firstVideoTag.pts);\n      }\n\n      if (tech.seeking()) {\n        // Do not use previously saved buffer end values while seeking since buffer\n        // is cleared on all seeks\n        this.videoBufferEnd_ = NaN;\n        this.audioBufferEnd_ = NaN;\n      }\n\n      if (isNaN(this.videoBufferEnd_)) {\n        if (tech.buffered().length) {\n          videoTargetPts = tech.buffered().end(0) - this.timestampOffset;\n        }\n\n        // Trim to currentTime if seeking\n        if (tech.seeking()) {\n          videoTargetPts = Math.max(videoTargetPts, tech.currentTime() - this.timestampOffset);\n        }\n\n        // PTS values are represented in milliseconds\n        videoTargetPts *= 1e3;\n        videoTargetPts += this.basePtsOffset_;\n      } else {\n        // Add a fudge factor of 0.1 to the last video pts appended since a rendition change\n        // could append an overlapping segment, in which case there is a high likelyhood\n        // a tag could have a matching pts to videoBufferEnd_, which would cause\n        // that tag to get appended by the tag.pts >= targetPts check below even though it\n        // is a duplicate of what was previously appended\n        videoTargetPts = this.videoBufferEnd_ + 0.1;\n      }\n\n      // filter complete GOPs with a presentation time less than the seek target/end of buffer\n      var currentIndex = videoTags.length;\n\n      // if the last tag is beyond videoTargetPts, then do not search the list for a GOP\n      // since our videoTargetPts lies in a future segment\n      if (currentIndex && videoTags[currentIndex - 1].pts >= videoTargetPts) {\n        // Start by walking backwards from the end of the list until we reach a tag that\n        // is equal to or less than videoTargetPts\n        while (--currentIndex) {\n          var currentTag = videoTags[currentIndex];\n\n          if (currentTag.pts > videoTargetPts) {\n            continue;\n          }\n\n          // if we see a keyFrame or metadata tag once we've gone below videoTargetPts,\n          // exit the loop as this is the start of the GOP that we want to append\n          if (currentTag.keyFrame || currentTag.metaDataTag) {\n            break;\n          }\n        }\n\n        // We need to check if there are any metadata tags that come before currentIndex\n        // as those will be metadata tags associated with the GOP we are appending\n        // There could be 0 to 2 metadata tags that come before the currentIndex depending\n        // on what videoTargetPts is and whether the transmuxer prepended metadata tags to this\n        // key frame\n        while (currentIndex) {\n          var nextTag = videoTags[currentIndex - 1];\n\n          if (!nextTag.metaDataTag) {\n            break;\n          }\n\n          currentIndex--;\n        }\n      }\n\n      var filteredVideoTags = videoTags.slice(currentIndex);\n\n      var audioTargetPts = undefined;\n\n      if (isNaN(this.audioBufferEnd_)) {\n        audioTargetPts = videoTargetPts;\n      } else {\n        // Add a fudge factor of 0.1 to the last video pts appended since a rendition change\n        // could append an overlapping segment, in which case there is a high likelyhood\n        // a tag could have a matching pts to videoBufferEnd_, which would cause\n        // that tag to get appended by the tag.pts >= targetPts check below even though it\n        // is a duplicate of what was previously appended\n        audioTargetPts = this.audioBufferEnd_ + 0.1;\n      }\n\n      if (filteredVideoTags.length) {\n        // If targetPts intersects a GOP and we appended the tags for the GOP that came\n        // before targetPts, we want to make sure to trim audio tags at the pts\n        // of the first video tag to avoid brief moments of silence\n        audioTargetPts = Math.min(audioTargetPts, filteredVideoTags[0].pts);\n      }\n\n      // skip tags with a presentation time less than the seek target/end of buffer\n      currentIndex = 0;\n\n      while (currentIndex < audioTags.length) {\n        if (audioTags[currentIndex].pts >= audioTargetPts) {\n          break;\n        }\n\n        currentIndex++;\n      }\n\n      var filteredAudioTags = audioTags.slice(currentIndex);\n\n      // update the audio and video buffer ends\n      if (filteredAudioTags.length) {\n        this.audioBufferEnd_ = filteredAudioTags[filteredAudioTags.length - 1].pts;\n      }\n      if (filteredVideoTags.length) {\n        this.videoBufferEnd_ = filteredVideoTags[filteredVideoTags.length - 1].pts;\n      }\n\n      var tags = this.getOrderedTags_(filteredVideoTags, filteredAudioTags);\n\n      if (tags.length === 0) {\n        return;\n      }\n\n      // If we are appending data that comes before our target pts, we want to tell\n      // the swf to adjust its notion of current time to account for the extra tags\n      // we are appending to complete the GOP that intersects with targetPts\n      if (tags[0].pts < videoTargetPts && tech.seeking()) {\n        var fudgeFactor = 1 / 30;\n        var currentTime = tech.currentTime();\n        var diff = (videoTargetPts - tags[0].pts) / 1e3;\n        var adjustedTime = currentTime - diff;\n\n        if (adjustedTime < fudgeFactor) {\n          adjustedTime = 0;\n        }\n\n        try {\n          this.mediaSource_.swfObj.vjs_adjustCurrentTime(adjustedTime);\n        } catch (e) {\n          // no-op for backwards compatability of swf. If adjustCurrentTime fails,\n          // the swf may incorrectly report currentTime and buffered ranges\n          // but should not affect playback over than the time displayed on the\n          // progress bar is inaccurate\n        }\n      }\n\n      // concatenate the bytes into a single segment\n      for (var i = 0; i < tags.length; i++) {\n        segmentByteLength += tags[i].bytes.byteLength;\n      }\n      segment = new Uint8Array(segmentByteLength);\n      for (var i = 0, j = 0; i < tags.length; i++) {\n        segment.set(tags[i].bytes, j);\n        j += tags[i].bytes.byteLength;\n      }\n\n      return segment;\n    }\n\n    /**\n     * Assemble the FLV tags in decoder order.\n     *\n     * @private\n     * @param {Array} videoTags list of video tags\n     * @param {Array} audioTags list of audio tags\n     */\n  }, {\n    key: 'getOrderedTags_',\n    value: function getOrderedTags_(videoTags, audioTags) {\n      var tag = undefined;\n      var tags = [];\n\n      while (videoTags.length || audioTags.length) {\n        if (!videoTags.length) {\n          // only audio tags remain\n          tag = audioTags.shift();\n        } else if (!audioTags.length) {\n          // only video tags remain\n          tag = videoTags.shift();\n        } else if (audioTags[0].dts < videoTags[0].dts) {\n          // audio should be decoded next\n          tag = audioTags.shift();\n        } else {\n          // video should be decoded next\n          tag = videoTags.shift();\n        }\n\n        tags.push(tag);\n      }\n\n      return tags;\n    }\n  }, {\n    key: 'onHlsReset_',\n    value: function onHlsReset_() {\n      this.transmuxer_.postMessage({ action: 'resetCaptions' });\n    }\n  }]);\n\n  return FlashSourceBuffer;\n})(_videoJs2['default'].EventTarget);\n\nexports['default'] = FlashSourceBuffer;\nmodule.exports = exports['default'];","'use strict';\n\nvar BN = require('bn.js');\nvar inherits = require('inherits');\nvar Base = require('./base');\n\nvar utils = require('../utils');\n\nfunction MontCurve(conf) {\n  Base.call(this, 'mont', conf);\n\n  this.a = new BN(conf.a, 16).toRed(this.red);\n  this.b = new BN(conf.b, 16).toRed(this.red);\n  this.i4 = new BN(4).toRed(this.red).redInvm();\n  this.two = new BN(2).toRed(this.red);\n  this.a24 = this.i4.redMul(this.a.redAdd(this.two));\n}\ninherits(MontCurve, Base);\nmodule.exports = MontCurve;\n\nMontCurve.prototype.validate = function validate(point) {\n  var x = point.normalize().x;\n  var x2 = x.redSqr();\n  var rhs = x2.redMul(x).redAdd(x2.redMul(this.a)).redAdd(x);\n  var y = rhs.redSqrt();\n\n  return y.redSqr().cmp(rhs) === 0;\n};\n\nfunction Point(curve, x, z) {\n  Base.BasePoint.call(this, curve, 'projective');\n  if (x === null && z === null) {\n    this.x = this.curve.one;\n    this.z = this.curve.zero;\n  } else {\n    this.x = new BN(x, 16);\n    this.z = new BN(z, 16);\n    if (!this.x.red)\n      this.x = this.x.toRed(this.curve.red);\n    if (!this.z.red)\n      this.z = this.z.toRed(this.curve.red);\n  }\n}\ninherits(Point, Base.BasePoint);\n\nMontCurve.prototype.decodePoint = function decodePoint(bytes, enc) {\n  return this.point(utils.toArray(bytes, enc), 1);\n};\n\nMontCurve.prototype.point = function point(x, z) {\n  return new Point(this, x, z);\n};\n\nMontCurve.prototype.pointFromJSON = function pointFromJSON(obj) {\n  return Point.fromJSON(this, obj);\n};\n\nPoint.prototype.precompute = function precompute() {\n  // No-op\n};\n\nPoint.prototype._encode = function _encode() {\n  return this.getX().toArray('be', this.curve.p.byteLength());\n};\n\nPoint.fromJSON = function fromJSON(curve, obj) {\n  return new Point(curve, obj[0], obj[1] || curve.one);\n};\n\nPoint.prototype.inspect = function inspect() {\n  if (this.isInfinity())\n    return '<EC Point Infinity>';\n  return '<EC Point x: ' + this.x.fromRed().toString(16, 2) +\n      ' z: ' + this.z.fromRed().toString(16, 2) + '>';\n};\n\nPoint.prototype.isInfinity = function isInfinity() {\n  // XXX This code assumes that zero is always zero in red\n  return this.z.cmpn(0) === 0;\n};\n\nPoint.prototype.dbl = function dbl() {\n  // http://hyperelliptic.org/EFD/g1p/auto-montgom-xz.html#doubling-dbl-1987-m-3\n  // 2M + 2S + 4A\n\n  // A = X1 + Z1\n  var a = this.x.redAdd(this.z);\n  // AA = A^2\n  var aa = a.redSqr();\n  // B = X1 - Z1\n  var b = this.x.redSub(this.z);\n  // BB = B^2\n  var bb = b.redSqr();\n  // C = AA - BB\n  var c = aa.redSub(bb);\n  // X3 = AA * BB\n  var nx = aa.redMul(bb);\n  // Z3 = C * (BB + A24 * C)\n  var nz = c.redMul(bb.redAdd(this.curve.a24.redMul(c)));\n  return this.curve.point(nx, nz);\n};\n\nPoint.prototype.add = function add() {\n  throw new Error('Not supported on Montgomery curve');\n};\n\nPoint.prototype.diffAdd = function diffAdd(p, diff) {\n  // http://hyperelliptic.org/EFD/g1p/auto-montgom-xz.html#diffadd-dadd-1987-m-3\n  // 4M + 2S + 6A\n\n  // A = X2 + Z2\n  var a = this.x.redAdd(this.z);\n  // B = X2 - Z2\n  var b = this.x.redSub(this.z);\n  // C = X3 + Z3\n  var c = p.x.redAdd(p.z);\n  // D = X3 - Z3\n  var d = p.x.redSub(p.z);\n  // DA = D * A\n  var da = d.redMul(a);\n  // CB = C * B\n  var cb = c.redMul(b);\n  // X5 = Z1 * (DA + CB)^2\n  var nx = diff.z.redMul(da.redAdd(cb).redSqr());\n  // Z5 = X1 * (DA - CB)^2\n  var nz = diff.x.redMul(da.redISub(cb).redSqr());\n  return this.curve.point(nx, nz);\n};\n\nPoint.prototype.mul = function mul(k) {\n  var t = k.clone();\n  var a = this; // (N / 2) * Q + Q\n  var b = this.curve.point(null, null); // (N / 2) * Q\n  var c = this; // Q\n\n  for (var bits = []; t.cmpn(0) !== 0; t.iushrn(1))\n    bits.push(t.andln(1));\n\n  for (var i = bits.length - 1; i >= 0; i--) {\n    if (bits[i] === 0) {\n      // N * Q + Q = ((N / 2) * Q + Q)) + (N / 2) * Q\n      a = a.diffAdd(b, c);\n      // N * Q = 2 * ((N / 2) * Q + Q))\n      b = b.dbl();\n    } else {\n      // N * Q = ((N / 2) * Q + Q) + ((N / 2) * Q)\n      b = a.diffAdd(b, c);\n      // N * Q + Q = 2 * ((N / 2) * Q + Q)\n      a = a.dbl();\n    }\n  }\n  return b;\n};\n\nPoint.prototype.mulAdd = function mulAdd() {\n  throw new Error('Not supported on Montgomery curve');\n};\n\nPoint.prototype.jumlAdd = function jumlAdd() {\n  throw new Error('Not supported on Montgomery curve');\n};\n\nPoint.prototype.eq = function eq(other) {\n  return this.getX().cmp(other.getX()) === 0;\n};\n\nPoint.prototype.normalize = function normalize() {\n  this.x = this.x.redMul(this.z.redInvm());\n  this.z = this.curve.one;\n  return this;\n};\n\nPoint.prototype.getX = function getX() {\n  // Normalize coordinates\n  this.normalize();\n\n  return this.x.fromRed();\n};\n","/*\n * pkcs7.pad\n * https://github.com/brightcove/pkcs7\n *\n * Copyright (c) 2014 Brightcove\n * Licensed under the apache2 license.\n */\n\n'use strict';\n\nvar PADDING;\n\n/**\n * Returns a new Uint8Array that is padded with PKCS#7 padding.\n * @param plaintext {Uint8Array} the input bytes before encryption\n * @return {Uint8Array} the padded bytes\n * @see http://tools.ietf.org/html/rfc5652\n */\nmodule.exports = function pad(plaintext) {\n  var padding = PADDING[(plaintext.byteLength % 16) || 0],\n      result = new Uint8Array(plaintext.byteLength + padding.length);\n  result.set(plaintext);\n  result.set(padding, plaintext.byteLength);\n  return result;\n};\n\n// pre-define the padding values\nPADDING = [\n  [16, 16, 16, 16,\n   16, 16, 16, 16,\n   16, 16, 16, 16,\n   16, 16, 16, 16],\n\n  [15, 15, 15, 15,\n   15, 15, 15, 15,\n   15, 15, 15, 15,\n   15, 15, 15],\n\n  [14, 14, 14, 14,\n   14, 14, 14, 14,\n   14, 14, 14, 14,\n   14, 14],\n\n  [13, 13, 13, 13,\n   13, 13, 13, 13,\n   13, 13, 13, 13,\n   13],\n\n  [12, 12, 12, 12,\n   12, 12, 12, 12,\n   12, 12, 12, 12],\n\n  [11, 11, 11, 11,\n   11, 11, 11, 11,\n   11, 11, 11],\n\n  [10, 10, 10, 10,\n   10, 10, 10, 10,\n   10, 10],\n\n  [9, 9, 9, 9,\n   9, 9, 9, 9,\n   9],\n\n  [8, 8, 8, 8,\n   8, 8, 8, 8],\n\n  [7, 7, 7, 7,\n   7, 7, 7],\n\n  [6, 6, 6, 6,\n   6, 6],\n\n  [5, 5, 5, 5,\n   5],\n\n  [4, 4, 4, 4],\n\n  [3, 3, 3],\n\n  [2, 2],\n\n  [1]\n];\n","var exports = module.exports = function SHA (algorithm) {\n  algorithm = algorithm.toLowerCase()\n\n  var Algorithm = exports[algorithm]\n  if (!Algorithm) throw new Error(algorithm + ' is not supported (we accept pull requests)')\n\n  return new Algorithm()\n}\n\nexports.sha = require('./sha')\nexports.sha1 = require('./sha1')\nexports.sha224 = require('./sha224')\nexports.sha256 = require('./sha256')\nexports.sha384 = require('./sha384')\nexports.sha512 = require('./sha512')\n","var NATIVE_WEAK_MAP = require('../internals/native-weak-map');\nvar global = require('../internals/global');\nvar isObject = require('../internals/is-object');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar objectHas = require('../internals/has');\nvar shared = require('../internals/shared-store');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\n\nvar WeakMap = global.WeakMap;\nvar set, get, has;\n\nvar enforce = function (it) {\n  return has(it) ? get(it) : set(it, {});\n};\n\nvar getterFor = function (TYPE) {\n  return function (it) {\n    var state;\n    if (!isObject(it) || (state = get(it)).type !== TYPE) {\n      throw TypeError('Incompatible receiver, ' + TYPE + ' required');\n    } return state;\n  };\n};\n\nif (NATIVE_WEAK_MAP) {\n  var store = shared.state || (shared.state = new WeakMap());\n  var wmget = store.get;\n  var wmhas = store.has;\n  var wmset = store.set;\n  set = function (it, metadata) {\n    metadata.facade = it;\n    wmset.call(store, it, metadata);\n    return metadata;\n  };\n  get = function (it) {\n    return wmget.call(store, it) || {};\n  };\n  has = function (it) {\n    return wmhas.call(store, it);\n  };\n} else {\n  var STATE = sharedKey('state');\n  hiddenKeys[STATE] = true;\n  set = function (it, metadata) {\n    metadata.facade = it;\n    createNonEnumerableProperty(it, STATE, metadata);\n    return metadata;\n  };\n  get = function (it) {\n    return objectHas(it, STATE) ? it[STATE] : {};\n  };\n  has = function (it) {\n    return objectHas(it, STATE);\n  };\n}\n\nmodule.exports = {\n  set: set,\n  get: get,\n  has: has,\n  enforce: enforce,\n  getterFor: getterFor\n};\n","'use strict';\n\nvar hash = require('hash.js');\nvar utils = require('minimalistic-crypto-utils');\nvar assert = require('minimalistic-assert');\n\nfunction HmacDRBG(options) {\n  if (!(this instanceof HmacDRBG))\n    return new HmacDRBG(options);\n  this.hash = options.hash;\n  this.predResist = !!options.predResist;\n\n  this.outLen = this.hash.outSize;\n  this.minEntropy = options.minEntropy || this.hash.hmacStrength;\n\n  this._reseed = null;\n  this.reseedInterval = null;\n  this.K = null;\n  this.V = null;\n\n  var entropy = utils.toArray(options.entropy, options.entropyEnc || 'hex');\n  var nonce = utils.toArray(options.nonce, options.nonceEnc || 'hex');\n  var pers = utils.toArray(options.pers, options.persEnc || 'hex');\n  assert(entropy.length >= (this.minEntropy / 8),\n         'Not enough entropy. Minimum is: ' + this.minEntropy + ' bits');\n  this._init(entropy, nonce, pers);\n}\nmodule.exports = HmacDRBG;\n\nHmacDRBG.prototype._init = function init(entropy, nonce, pers) {\n  var seed = entropy.concat(nonce).concat(pers);\n\n  this.K = new Array(this.outLen / 8);\n  this.V = new Array(this.outLen / 8);\n  for (var i = 0; i < this.V.length; i++) {\n    this.K[i] = 0x00;\n    this.V[i] = 0x01;\n  }\n\n  this._update(seed);\n  this._reseed = 1;\n  this.reseedInterval = 0x1000000000000;  // 2^48\n};\n\nHmacDRBG.prototype._hmac = function hmac() {\n  return new hash.hmac(this.hash, this.K);\n};\n\nHmacDRBG.prototype._update = function update(seed) {\n  var kmac = this._hmac()\n                 .update(this.V)\n                 .update([ 0x00 ]);\n  if (seed)\n    kmac = kmac.update(seed);\n  this.K = kmac.digest();\n  this.V = this._hmac().update(this.V).digest();\n  if (!seed)\n    return;\n\n  this.K = this._hmac()\n               .update(this.V)\n               .update([ 0x01 ])\n               .update(seed)\n               .digest();\n  this.V = this._hmac().update(this.V).digest();\n};\n\nHmacDRBG.prototype.reseed = function reseed(entropy, entropyEnc, add, addEnc) {\n  // Optional entropy enc\n  if (typeof entropyEnc !== 'string') {\n    addEnc = add;\n    add = entropyEnc;\n    entropyEnc = null;\n  }\n\n  entropy = utils.toArray(entropy, entropyEnc);\n  add = utils.toArray(add, addEnc);\n\n  assert(entropy.length >= (this.minEntropy / 8),\n         'Not enough entropy. Minimum is: ' + this.minEntropy + ' bits');\n\n  this._update(entropy.concat(add || []));\n  this._reseed = 1;\n};\n\nHmacDRBG.prototype.generate = function generate(len, enc, add, addEnc) {\n  if (this._reseed > this.reseedInterval)\n    throw new Error('Reseed is required');\n\n  // Optional encoding\n  if (typeof enc !== 'string') {\n    addEnc = add;\n    add = enc;\n    enc = null;\n  }\n\n  // Optional additional data\n  if (add) {\n    add = utils.toArray(add, addEnc || 'hex');\n    this._update(add);\n  }\n\n  var temp = [];\n  while (temp.length < len) {\n    this.V = this._hmac().update(this.V).digest();\n    temp = temp.concat(this.V);\n  }\n\n  var res = temp.slice(0, len);\n  this._update(add);\n  this._reseed++;\n  return utils.encode(res, enc);\n};\n","var xor = require('buffer-xor')\nvar Buffer = require('safe-buffer').Buffer\nvar incr32 = require('../incr32')\n\nfunction getBlock (self) {\n  var out = self._cipher.encryptBlockRaw(self._prev)\n  incr32(self._prev)\n  return out\n}\n\nvar blockSize = 16\nexports.encrypt = function (self, chunk) {\n  var chunkNum = Math.ceil(chunk.length / blockSize)\n  var start = self._cache.length\n  self._cache = Buffer.concat([\n    self._cache,\n    Buffer.allocUnsafe(chunkNum * blockSize)\n  ])\n  for (var i = 0; i < chunkNum; i++) {\n    var out = getBlock(self)\n    var offset = start + i * blockSize\n    self._cache.writeUInt32BE(out[0], offset + 0)\n    self._cache.writeUInt32BE(out[1], offset + 4)\n    self._cache.writeUInt32BE(out[2], offset + 8)\n    self._cache.writeUInt32BE(out[3], offset + 12)\n  }\n  var pad = self._cache.slice(0, chunk.length)\n  self._cache = self._cache.slice(chunk.length)\n  return xor(chunk, pad)\n}\n","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\n// runtime helper for setting properties on components\n// in a tree-shakable way\nexports.default = (sfc, props) => {\n    const target = sfc.__vccOpts || sfc;\n    for (const [key, val] of props) {\n        target[key] = val;\n    }\n    return target;\n};\n","export default function _arrayLikeToArray(arr, len) {\n  if (len == null || len > arr.length) len = arr.length;\n\n  for (var i = 0, arr2 = new Array(len); i < len; i++) {\n    arr2[i] = arr[i];\n  }\n\n  return arr2;\n}","/**\n * @file resolve-url.js\n */\n\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _urlToolkit = require('url-toolkit');\n\nvar _urlToolkit2 = _interopRequireDefault(_urlToolkit);\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar resolveUrl = function resolveUrl(baseURL, relativeURL) {\n  // return early if we don't need to resolve\n  if (/^[a-z]+:/i.test(relativeURL)) {\n    return relativeURL;\n  }\n\n  // if the base URL is relative then combine with the current location\n  if (!/\\/\\//i.test(baseURL)) {\n    baseURL = _urlToolkit2['default'].buildAbsoluteURL(_globalWindow2['default'].location.href, baseURL);\n  }\n\n  return _urlToolkit2['default'].buildAbsoluteURL(baseURL, relativeURL);\n};\n\nexports['default'] = resolveUrl;\nmodule.exports = exports['default'];","/*!\n  * vue-router v4.0.6\n  * (c) 2021 Eduardo San Martin Morote\n  * @license MIT\n  */\nimport { getCurrentInstance, inject, onUnmounted, onDeactivated, onActivated, computed, unref, defineComponent, reactive, watchEffect, h, provide, ref, watch, shallowRef, nextTick } from 'vue';\n\nconst hasSymbol = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';\r\nconst PolySymbol = (name) => \r\n// vr = vue router\r\nhasSymbol\r\n    ? Symbol((process.env.NODE_ENV !== 'production') ? '[vue-router]: ' + name : name)\r\n    : ((process.env.NODE_ENV !== 'production') ? '[vue-router]: ' : '_vr_') + name;\r\n// rvlm = Router View Location Matched\r\n/**\r\n * RouteRecord being rendered by the closest ancestor Router View. Used for\r\n * `onBeforeRouteUpdate` and `onBeforeRouteLeave`. rvlm stands for Router View\r\n * Location Matched\r\n *\r\n * @internal\r\n */\r\nconst matchedRouteKey = /*#__PURE__*/ PolySymbol((process.env.NODE_ENV !== 'production') ? 'router view location matched' : 'rvlm');\r\n/**\r\n * Allows overriding the router view depth to control which component in\r\n * `matched` is rendered. rvd stands for Router View Depth\r\n *\r\n * @internal\r\n */\r\nconst viewDepthKey = /*#__PURE__*/ PolySymbol((process.env.NODE_ENV !== 'production') ? 'router view depth' : 'rvd');\r\n/**\r\n * Allows overriding the router instance returned by `useRouter` in tests. r\r\n * stands for router\r\n *\r\n * @internal\r\n */\r\nconst routerKey = /*#__PURE__*/ PolySymbol((process.env.NODE_ENV !== 'production') ? 'router' : 'r');\r\n/**\r\n * Allows overriding the current route returned by `useRoute` in tests. rl\r\n * stands for route location\r\n *\r\n * @internal\r\n */\r\nconst routeLocationKey = /*#__PURE__*/ PolySymbol((process.env.NODE_ENV !== 'production') ? 'route location' : 'rl');\r\n/**\r\n * Allows overriding the current route used by router-view. Internally this is\r\n * used when the `route` prop is passed.\r\n *\r\n * @internal\r\n */\r\nconst routerViewLocationKey = /*#__PURE__*/ PolySymbol((process.env.NODE_ENV !== 'production') ? 'router view location' : 'rvl');\n\nconst isBrowser = typeof window !== 'undefined';\n\nfunction isESModule(obj) {\r\n    return obj.__esModule || (hasSymbol && obj[Symbol.toStringTag] === 'Module');\r\n}\r\nconst assign = Object.assign;\r\nfunction applyToParams(fn, params) {\r\n    const newParams = {};\r\n    for (const key in params) {\r\n        const value = params[key];\r\n        newParams[key] = Array.isArray(value) ? value.map(fn) : fn(value);\r\n    }\r\n    return newParams;\r\n}\r\nlet noop = () => { };\n\nfunction warn(msg) {\r\n    // avoid using ...args as it breaks in older Edge builds\r\n    const args = Array.from(arguments).slice(1);\r\n    console.warn.apply(console, ['[Vue Router warn]: ' + msg].concat(args));\r\n}\n\nconst TRAILING_SLASH_RE = /\\/$/;\r\nconst removeTrailingSlash = (path) => path.replace(TRAILING_SLASH_RE, '');\r\n/**\r\n * Transforms an URI into a normalized history location\r\n *\r\n * @param parseQuery\r\n * @param location - URI to normalize\r\n * @param currentLocation - current absolute location. Allows resolving relative\r\n * paths. Must start with `/`. Defaults to `/`\r\n * @returns a normalized history location\r\n */\r\nfunction parseURL(parseQuery, location, currentLocation = '/') {\r\n    let path, query = {}, searchString = '', hash = '';\r\n    // Could use URL and URLSearchParams but IE 11 doesn't support it\r\n    const searchPos = location.indexOf('?');\r\n    const hashPos = location.indexOf('#', searchPos > -1 ? searchPos : 0);\r\n    if (searchPos > -1) {\r\n        path = location.slice(0, searchPos);\r\n        searchString = location.slice(searchPos + 1, hashPos > -1 ? hashPos : location.length);\r\n        query = parseQuery(searchString);\r\n    }\r\n    if (hashPos > -1) {\r\n        path = path || location.slice(0, hashPos);\r\n        // keep the # character\r\n        hash = location.slice(hashPos, location.length);\r\n    }\r\n    // no search and no query\r\n    path = resolveRelativePath(path != null ? path : location, currentLocation);\r\n    // empty path means a relative query or hash `?foo=f`, `#thing`\r\n    return {\r\n        fullPath: path + (searchString && '?') + searchString + hash,\r\n        path,\r\n        query,\r\n        hash,\r\n    };\r\n}\r\n/**\r\n * Stringifies a URL object\r\n *\r\n * @param stringifyQuery\r\n * @param location\r\n */\r\nfunction stringifyURL(stringifyQuery, location) {\r\n    let query = location.query ? stringifyQuery(location.query) : '';\r\n    return location.path + (query && '?') + query + (location.hash || '');\r\n}\r\n/**\r\n * Strips off the base from the beginning of a location.pathname in a non\r\n * case-sensitive way.\r\n *\r\n * @param pathname - location.pathname\r\n * @param base - base to strip off\r\n */\r\nfunction stripBase(pathname, base) {\r\n    // no base or base is not found at the beginning\r\n    if (!base || pathname.toLowerCase().indexOf(base.toLowerCase()))\r\n        return pathname;\r\n    return pathname.slice(base.length) || '/';\r\n}\r\n/**\r\n * Checks if two RouteLocation are equal. This means that both locations are\r\n * pointing towards the same {@link RouteRecord} and that all `params`, `query`\r\n * parameters and `hash` are the same\r\n *\r\n * @param a - first {@link RouteLocation}\r\n * @param b - second {@link RouteLocation}\r\n */\r\nfunction isSameRouteLocation(stringifyQuery, a, b) {\r\n    let aLastIndex = a.matched.length - 1;\r\n    let bLastIndex = b.matched.length - 1;\r\n    return (aLastIndex > -1 &&\r\n        aLastIndex === bLastIndex &&\r\n        isSameRouteRecord(a.matched[aLastIndex], b.matched[bLastIndex]) &&\r\n        isSameRouteLocationParams(a.params, b.params) &&\r\n        stringifyQuery(a.query) === stringifyQuery(b.query) &&\r\n        a.hash === b.hash);\r\n}\r\n/**\r\n * Check if two `RouteRecords` are equal. Takes into account aliases: they are\r\n * considered equal to the `RouteRecord` they are aliasing.\r\n *\r\n * @param a - first {@link RouteRecord}\r\n * @param b - second {@link RouteRecord}\r\n */\r\nfunction isSameRouteRecord(a, b) {\r\n    // since the original record has an undefined value for aliasOf\r\n    // but all aliases point to the original record, this will always compare\r\n    // the original record\r\n    return (a.aliasOf || a) === (b.aliasOf || b);\r\n}\r\nfunction isSameRouteLocationParams(a, b) {\r\n    if (Object.keys(a).length !== Object.keys(b).length)\r\n        return false;\r\n    for (let key in a) {\r\n        if (!isSameRouteLocationParamsValue(a[key], b[key]))\r\n            return false;\r\n    }\r\n    return true;\r\n}\r\nfunction isSameRouteLocationParamsValue(a, b) {\r\n    return Array.isArray(a)\r\n        ? isEquivalentArray(a, b)\r\n        : Array.isArray(b)\r\n            ? isEquivalentArray(b, a)\r\n            : a === b;\r\n}\r\n/**\r\n * Check if two arrays are the same or if an array with one single entry is the\r\n * same as another primitive value. Used to check query and parameters\r\n *\r\n * @param a - array of values\r\n * @param b - array of values or a single value\r\n */\r\nfunction isEquivalentArray(a, b) {\r\n    return Array.isArray(b)\r\n        ? a.length === b.length && a.every((value, i) => value === b[i])\r\n        : a.length === 1 && a[0] === b;\r\n}\r\n/**\r\n * Resolves a relative path that starts with `.`.\r\n *\r\n * @param to - path location we are resolving\r\n * @param from - currentLocation.path, should start with `/`\r\n */\r\nfunction resolveRelativePath(to, from) {\r\n    if (to.startsWith('/'))\r\n        return to;\r\n    if ((process.env.NODE_ENV !== 'production') && !from.startsWith('/')) {\r\n        warn(`Cannot resolve a relative location without an absolute path. Trying to resolve \"${to}\" from \"${from}\". It should look like \"/${from}\".`);\r\n        return to;\r\n    }\r\n    if (!to)\r\n        return from;\r\n    const fromSegments = from.split('/');\r\n    const toSegments = to.split('/');\r\n    let position = fromSegments.length - 1;\r\n    let toPosition;\r\n    let segment;\r\n    for (toPosition = 0; toPosition < toSegments.length; toPosition++) {\r\n        segment = toSegments[toPosition];\r\n        // can't go below zero\r\n        if (position === 1 || segment === '.')\r\n            continue;\r\n        if (segment === '..')\r\n            position--;\r\n        // found something that is not relative path\r\n        else\r\n            break;\r\n    }\r\n    return (fromSegments.slice(0, position).join('/') +\r\n        '/' +\r\n        toSegments\r\n            .slice(toPosition - (toPosition === toSegments.length ? 1 : 0))\r\n            .join('/'));\r\n}\n\nvar NavigationType;\r\n(function (NavigationType) {\r\n    NavigationType[\"pop\"] = \"pop\";\r\n    NavigationType[\"push\"] = \"push\";\r\n})(NavigationType || (NavigationType = {}));\r\nvar NavigationDirection;\r\n(function (NavigationDirection) {\r\n    NavigationDirection[\"back\"] = \"back\";\r\n    NavigationDirection[\"forward\"] = \"forward\";\r\n    NavigationDirection[\"unknown\"] = \"\";\r\n})(NavigationDirection || (NavigationDirection = {}));\r\n/**\r\n * Starting location for Histories\r\n */\r\nconst START = '';\r\n// Generic utils\r\n/**\r\n * Normalizes a base by removing any trailing slash and reading the base tag if\r\n * present.\r\n *\r\n * @param base - base to normalize\r\n */\r\nfunction normalizeBase(base) {\r\n    if (!base) {\r\n        if (isBrowser) {\r\n            // respect <base> tag\r\n            const baseEl = document.querySelector('base');\r\n            base = (baseEl && baseEl.getAttribute('href')) || '/';\r\n            // strip full URL origin\r\n            base = base.replace(/^\\w+:\\/\\/[^\\/]+/, '');\r\n        }\r\n        else {\r\n            base = '/';\r\n        }\r\n    }\r\n    // ensure leading slash when it was removed by the regex above avoid leading\r\n    // slash with hash because the file could be read from the disk like file://\r\n    // and the leading slash would cause problems\r\n    if (base[0] !== '/' && base[0] !== '#')\r\n        base = '/' + base;\r\n    // remove the trailing slash so all other method can just do `base + fullPath`\r\n    // to build an href\r\n    return removeTrailingSlash(base);\r\n}\r\n// remove any character before the hash\r\nconst BEFORE_HASH_RE = /^[^#]+#/;\r\nfunction createHref(base, location) {\r\n    return base.replace(BEFORE_HASH_RE, '#') + location;\r\n}\n\nfunction getElementPosition(el, offset) {\r\n    const docRect = document.documentElement.getBoundingClientRect();\r\n    const elRect = el.getBoundingClientRect();\r\n    return {\r\n        behavior: offset.behavior,\r\n        left: elRect.left - docRect.left - (offset.left || 0),\r\n        top: elRect.top - docRect.top - (offset.top || 0),\r\n    };\r\n}\r\nconst computeScrollPosition = () => ({\r\n    left: window.pageXOffset,\r\n    top: window.pageYOffset,\r\n});\r\nfunction scrollToPosition(position) {\r\n    let scrollToOptions;\r\n    if ('el' in position) {\r\n        let positionEl = position.el;\r\n        const isIdSelector = typeof positionEl === 'string' && positionEl.startsWith('#');\r\n        /**\r\n         * `id`s can accept pretty much any characters, including CSS combinators\r\n         * like `>` or `~`. It's still possible to retrieve elements using\r\n         * `document.getElementById('~')` but it needs to be escaped when using\r\n         * `document.querySelector('#\\\\~')` for it to be valid. The only\r\n         * requirements for `id`s are them to be unique on the page and to not be\r\n         * empty (`id=\"\"`). Because of that, when passing an id selector, it should\r\n         * be properly escaped for it to work with `querySelector`. We could check\r\n         * for the id selector to be simple (no CSS combinators `+ >~`) but that\r\n         * would make things inconsistent since they are valid characters for an\r\n         * `id` but would need to be escaped when using `querySelector`, breaking\r\n         * their usage and ending up in no selector returned. Selectors need to be\r\n         * escaped:\r\n         *\r\n         * - `#1-thing` becomes `#\\31 -thing`\r\n         * - `#with~symbols` becomes `#with\\\\~symbols`\r\n         *\r\n         * - More information about  the topic can be found at\r\n         *   https://mathiasbynens.be/notes/html5-id-class.\r\n         * - Practical example: https://mathiasbynens.be/demo/html5-id\r\n         */\r\n        if ((process.env.NODE_ENV !== 'production') && typeof position.el === 'string') {\r\n            if (!isIdSelector || !document.getElementById(position.el.slice(1))) {\r\n                try {\r\n                    let foundEl = document.querySelector(position.el);\r\n                    if (isIdSelector && foundEl) {\r\n                        warn(`The selector \"${position.el}\" should be passed as \"el: document.querySelector('${position.el}')\" because it starts with \"#\".`);\r\n                        // return to avoid other warnings\r\n                        return;\r\n                    }\r\n                }\r\n                catch (err) {\r\n                    warn(`The selector \"${position.el}\" is invalid. If you are using an id selector, make sure to escape it. You can find more information about escaping characters in selectors at https://mathiasbynens.be/notes/css-escapes or use CSS.escape (https://developer.mozilla.org/en-US/docs/Web/API/CSS/escape).`);\r\n                    // return to avoid other warnings\r\n                    return;\r\n                }\r\n            }\r\n        }\r\n        const el = typeof positionEl === 'string'\r\n            ? isIdSelector\r\n                ? document.getElementById(positionEl.slice(1))\r\n                : document.querySelector(positionEl)\r\n            : positionEl;\r\n        if (!el) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(`Couldn't find element using selector \"${position.el}\" returned by scrollBehavior.`);\r\n            return;\r\n        }\r\n        scrollToOptions = getElementPosition(el, position);\r\n    }\r\n    else {\r\n        scrollToOptions = position;\r\n    }\r\n    if ('scrollBehavior' in document.documentElement.style)\r\n        window.scrollTo(scrollToOptions);\r\n    else {\r\n        window.scrollTo(scrollToOptions.left != null ? scrollToOptions.left : window.pageXOffset, scrollToOptions.top != null ? scrollToOptions.top : window.pageYOffset);\r\n    }\r\n}\r\nfunction getScrollKey(path, delta) {\r\n    const position = history.state ? history.state.position - delta : -1;\r\n    return position + path;\r\n}\r\nconst scrollPositions = new Map();\r\nfunction saveScrollPosition(key, scrollPosition) {\r\n    scrollPositions.set(key, scrollPosition);\r\n}\r\nfunction getSavedScrollPosition(key) {\r\n    const scroll = scrollPositions.get(key);\r\n    // consume it so it's not used again\r\n    scrollPositions.delete(key);\r\n    return scroll;\r\n}\r\n// TODO: RFC about how to save scroll position\r\n/**\r\n * ScrollBehavior instance used by the router to compute and restore the scroll\r\n * position when navigating.\r\n */\r\n// export interface ScrollHandler<ScrollPositionEntry extends HistoryStateValue, ScrollPosition extends ScrollPositionEntry> {\r\n//   // returns a scroll position that can be saved in history\r\n//   compute(): ScrollPositionEntry\r\n//   // can take an extended ScrollPositionEntry\r\n//   scroll(position: ScrollPosition): void\r\n// }\r\n// export const scrollHandler: ScrollHandler<ScrollPosition> = {\r\n//   compute: computeScroll,\r\n//   scroll: scrollToPosition,\r\n// }\n\nlet createBaseLocation = () => location.protocol + '//' + location.host;\r\n/**\r\n * Creates a normalized history location from a window.location object\r\n * @param location -\r\n */\r\nfunction createCurrentLocation(base, location) {\r\n    const { pathname, search, hash } = location;\r\n    // allows hash based url\r\n    const hashPos = base.indexOf('#');\r\n    if (hashPos > -1) {\r\n        // prepend the starting slash to hash so the url starts with /#\r\n        let pathFromHash = hash.slice(1);\r\n        if (pathFromHash[0] !== '/')\r\n            pathFromHash = '/' + pathFromHash;\r\n        return stripBase(pathFromHash, '');\r\n    }\r\n    const path = stripBase(pathname, base);\r\n    return path + search + hash;\r\n}\r\nfunction useHistoryListeners(base, historyState, currentLocation, replace) {\r\n    let listeners = [];\r\n    let teardowns = [];\r\n    // TODO: should it be a stack? a Dict. Check if the popstate listener\r\n    // can trigger twice\r\n    let pauseState = null;\r\n    const popStateHandler = ({ state, }) => {\r\n        const to = createCurrentLocation(base, location);\r\n        const from = currentLocation.value;\r\n        const fromState = historyState.value;\r\n        let delta = 0;\r\n        if (state) {\r\n            currentLocation.value = to;\r\n            historyState.value = state;\r\n            // ignore the popstate and reset the pauseState\r\n            if (pauseState && pauseState === from) {\r\n                pauseState = null;\r\n                return;\r\n            }\r\n            delta = fromState ? state.position - fromState.position : 0;\r\n        }\r\n        else {\r\n            replace(to);\r\n        }\r\n        // console.log({ deltaFromCurrent })\r\n        // Here we could also revert the navigation by calling history.go(-delta)\r\n        // this listener will have to be adapted to not trigger again and to wait for the url\r\n        // to be updated before triggering the listeners. Some kind of validation function would also\r\n        // need to be passed to the listeners so the navigation can be accepted\r\n        // call all listeners\r\n        listeners.forEach(listener => {\r\n            listener(currentLocation.value, from, {\r\n                delta,\r\n                type: NavigationType.pop,\r\n                direction: delta\r\n                    ? delta > 0\r\n                        ? NavigationDirection.forward\r\n                        : NavigationDirection.back\r\n                    : NavigationDirection.unknown,\r\n            });\r\n        });\r\n    };\r\n    function pauseListeners() {\r\n        pauseState = currentLocation.value;\r\n    }\r\n    function listen(callback) {\r\n        // setup the listener and prepare teardown callbacks\r\n        listeners.push(callback);\r\n        const teardown = () => {\r\n            const index = listeners.indexOf(callback);\r\n            if (index > -1)\r\n                listeners.splice(index, 1);\r\n        };\r\n        teardowns.push(teardown);\r\n        return teardown;\r\n    }\r\n    function beforeUnloadListener() {\r\n        const { history } = window;\r\n        if (!history.state)\r\n            return;\r\n        history.replaceState(assign({}, history.state, { scroll: computeScrollPosition() }), '');\r\n    }\r\n    function destroy() {\r\n        for (const teardown of teardowns)\r\n            teardown();\r\n        teardowns = [];\r\n        window.removeEventListener('popstate', popStateHandler);\r\n        window.removeEventListener('beforeunload', beforeUnloadListener);\r\n    }\r\n    // setup the listeners and prepare teardown callbacks\r\n    window.addEventListener('popstate', popStateHandler);\r\n    window.addEventListener('beforeunload', beforeUnloadListener);\r\n    return {\r\n        pauseListeners,\r\n        listen,\r\n        destroy,\r\n    };\r\n}\r\n/**\r\n * Creates a state object\r\n */\r\nfunction buildState(back, current, forward, replaced = false, computeScroll = false) {\r\n    return {\r\n        back,\r\n        current,\r\n        forward,\r\n        replaced,\r\n        position: window.history.length,\r\n        scroll: computeScroll ? computeScrollPosition() : null,\r\n    };\r\n}\r\nfunction useHistoryStateNavigation(base) {\r\n    const { history, location } = window;\r\n    // private variables\r\n    let currentLocation = {\r\n        value: createCurrentLocation(base, location),\r\n    };\r\n    let historyState = { value: history.state };\r\n    // build current history entry as this is a fresh navigation\r\n    if (!historyState.value) {\r\n        changeLocation(currentLocation.value, {\r\n            back: null,\r\n            current: currentLocation.value,\r\n            forward: null,\r\n            // the length is off by one, we need to decrease it\r\n            position: history.length - 1,\r\n            replaced: true,\r\n            // don't add a scroll as the user may have an anchor and we want\r\n            // scrollBehavior to be triggered without a saved position\r\n            scroll: null,\r\n        }, true);\r\n    }\r\n    function changeLocation(to, state, replace) {\r\n        /**\r\n         * if a base tag is provided and we are on a normal domain, we have to\r\n         * respect the provided `base` attribute because pushState() will use it and\r\n         * potentially erase anything before the `#` like at\r\n         * https://github.com/vuejs/vue-router-next/issues/685 where a base of\r\n         * `/folder/#` but a base of `/` would erase the `/folder/` section. If\r\n         * there is no host, the `<base>` tag makes no sense and if there isn't a\r\n         * base tag we can just use everything after the `#`.\r\n         */\r\n        const hashIndex = base.indexOf('#');\r\n        const url = hashIndex > -1\r\n            ? (location.host && document.querySelector('base')\r\n                ? base\r\n                : base.slice(hashIndex)) + to\r\n            : createBaseLocation() + base + to;\r\n        try {\r\n            // BROWSER QUIRK\r\n            // NOTE: Safari throws a SecurityError when calling this function 100 times in 30 seconds\r\n            history[replace ? 'replaceState' : 'pushState'](state, '', url);\r\n            historyState.value = state;\r\n        }\r\n        catch (err) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                warn('Error with push/replace State', err);\r\n            }\r\n            else {\r\n                console.error(err);\r\n            }\r\n            // Force the navigation, this also resets the call count\r\n            location[replace ? 'replace' : 'assign'](url);\r\n        }\r\n    }\r\n    function replace(to, data) {\r\n        const state = assign({}, history.state, buildState(historyState.value.back, \r\n        // keep back and forward entries but override current position\r\n        to, historyState.value.forward, true), data, { position: historyState.value.position });\r\n        changeLocation(to, state, true);\r\n        currentLocation.value = to;\r\n    }\r\n    function push(to, data) {\r\n        // Add to current entry the information of where we are going\r\n        // as well as saving the current position\r\n        const currentState = assign({}, \r\n        // use current history state to gracefully handle a wrong call to\r\n        // history.replaceState\r\n        // https://github.com/vuejs/vue-router-next/issues/366\r\n        historyState.value, history.state, {\r\n            forward: to,\r\n            scroll: computeScrollPosition(),\r\n        });\r\n        if ((process.env.NODE_ENV !== 'production') && !history.state) {\r\n            warn(`history.state seems to have been manually replaced without preserving the necessary values. Make sure to preserve existing history state if you are manually calling history.replaceState:\\n\\n` +\r\n                `history.replaceState(history.state, '', url)\\n\\n` +\r\n                `You can find more information at https://next.router.vuejs.org/guide/migration/#usage-of-history-state.`);\r\n        }\r\n        changeLocation(currentState.current, currentState, true);\r\n        const state = assign({}, buildState(currentLocation.value, to, null), { position: currentState.position + 1 }, data);\r\n        changeLocation(to, state, false);\r\n        currentLocation.value = to;\r\n    }\r\n    return {\r\n        location: currentLocation,\r\n        state: historyState,\r\n        push,\r\n        replace,\r\n    };\r\n}\r\n/**\r\n * Creates an HTML5 history. Most common history for single page applications.\r\n *\r\n * @param base -\r\n */\r\nfunction createWebHistory(base) {\r\n    base = normalizeBase(base);\r\n    const historyNavigation = useHistoryStateNavigation(base);\r\n    const historyListeners = useHistoryListeners(base, historyNavigation.state, historyNavigation.location, historyNavigation.replace);\r\n    function go(delta, triggerListeners = true) {\r\n        if (!triggerListeners)\r\n            historyListeners.pauseListeners();\r\n        history.go(delta);\r\n    }\r\n    const routerHistory = assign({\r\n        // it's overridden right after\r\n        location: '',\r\n        base,\r\n        go,\r\n        createHref: createHref.bind(null, base),\r\n    }, historyNavigation, historyListeners);\r\n    Object.defineProperty(routerHistory, 'location', {\r\n        get: () => historyNavigation.location.value,\r\n    });\r\n    Object.defineProperty(routerHistory, 'state', {\r\n        get: () => historyNavigation.state.value,\r\n    });\r\n    return routerHistory;\r\n}\n\n/**\r\n * Creates a in-memory based history. The main purpose of this history is to handle SSR. It starts in a special location that is nowhere.\r\n * It's up to the user to replace that location with the starter location by either calling `router.push` or `router.replace`.\r\n *\r\n * @param base - Base applied to all urls, defaults to '/'\r\n * @returns a history object that can be passed to the router constructor\r\n */\r\nfunction createMemoryHistory(base = '') {\r\n    let listeners = [];\r\n    let queue = [START];\r\n    let position = 0;\r\n    function setLocation(location) {\r\n        position++;\r\n        if (position === queue.length) {\r\n            // we are at the end, we can simply append a new entry\r\n            queue.push(location);\r\n        }\r\n        else {\r\n            // we are in the middle, we remove everything from here in the queue\r\n            queue.splice(position);\r\n            queue.push(location);\r\n        }\r\n    }\r\n    function triggerListeners(to, from, { direction, delta }) {\r\n        const info = {\r\n            direction,\r\n            delta,\r\n            type: NavigationType.pop,\r\n        };\r\n        for (let callback of listeners) {\r\n            callback(to, from, info);\r\n        }\r\n    }\r\n    const routerHistory = {\r\n        // rewritten by Object.defineProperty\r\n        location: START,\r\n        state: {},\r\n        base,\r\n        createHref: createHref.bind(null, base),\r\n        replace(to) {\r\n            // remove current entry and decrement position\r\n            queue.splice(position--, 1);\r\n            setLocation(to);\r\n        },\r\n        push(to, data) {\r\n            setLocation(to);\r\n        },\r\n        listen(callback) {\r\n            listeners.push(callback);\r\n            return () => {\r\n                const index = listeners.indexOf(callback);\r\n                if (index > -1)\r\n                    listeners.splice(index, 1);\r\n            };\r\n        },\r\n        destroy() {\r\n            listeners = [];\r\n        },\r\n        go(delta, shouldTrigger = true) {\r\n            const from = this.location;\r\n            const direction = \r\n            // we are considering delta === 0 going forward, but in abstract mode\r\n            // using 0 for the delta doesn't make sense like it does in html5 where\r\n            // it reloads the page\r\n            delta < 0 ? NavigationDirection.back : NavigationDirection.forward;\r\n            position = Math.max(0, Math.min(position + delta, queue.length - 1));\r\n            if (shouldTrigger) {\r\n                triggerListeners(this.location, from, {\r\n                    direction,\r\n                    delta,\r\n                });\r\n            }\r\n        },\r\n    };\r\n    Object.defineProperty(routerHistory, 'location', {\r\n        get: () => queue[position],\r\n    });\r\n    return routerHistory;\r\n}\n\n/**\r\n * Creates a hash history. Useful for web applications with no host (e.g.\r\n * `file://`) or when configuring a server to handle any URL is not possible.\r\n *\r\n * @param base - optional base to provide. Defaults to `location.pathname +\r\n * location.search` If there is a `<base>` tag in the `head`, its value will be\r\n * ignored in favor of this parameter **but note it affects all the\r\n * history.pushState() calls**, meaning that if you use a `<base>` tag, it's\r\n * `href` value **has to match this parameter** (ignoring anything after the\r\n * `#`).\r\n *\r\n * @example\r\n * ```js\r\n * // at https://example.com/folder\r\n * createWebHashHistory() // gives a url of `https://example.com/folder#`\r\n * createWebHashHistory('/folder/') // gives a url of `https://example.com/folder/#`\r\n * // if the `#` is provided in the base, it won't be added by `createWebHashHistory`\r\n * createWebHashHistory('/folder/#/app/') // gives a url of `https://example.com/folder/#/app/`\r\n * // you should avoid doing this because it changes the original url and breaks copying urls\r\n * createWebHashHistory('/other-folder/') // gives a url of `https://example.com/other-folder/#`\r\n *\r\n * // at file:///usr/etc/folder/index.html\r\n * // for locations with no `host`, the base is ignored\r\n * createWebHashHistory('/iAmIgnored') // gives a url of `file:///usr/etc/folder/index.html#`\r\n * ```\r\n */\r\nfunction createWebHashHistory(base) {\r\n    // Make sure this implementation is fine in terms of encoding, specially for IE11\r\n    // for `file://`, directly use the pathname and ignore the base\r\n    // location.pathname contains an initial `/` even at the root: `https://example.com`\r\n    base = location.host ? base || location.pathname + location.search : '';\r\n    // allow the user to provide a `#` in the middle: `/base/#/app`\r\n    if (base.indexOf('#') < 0)\r\n        base += '#';\r\n    if ((process.env.NODE_ENV !== 'production') && !base.endsWith('#/') && !base.endsWith('#')) {\r\n        warn(`A hash base must end with a \"#\":\\n\"${base}\" should be \"${base.replace(/#.*$/, '#')}\".`);\r\n    }\r\n    return createWebHistory(base);\r\n}\n\nfunction isRouteLocation(route) {\r\n    return typeof route === 'string' || (route && typeof route === 'object');\r\n}\r\nfunction isRouteName(name) {\r\n    return typeof name === 'string' || typeof name === 'symbol';\r\n}\n\n/**\r\n * Initial route location where the router is. Can be used in navigation guards\r\n * to differentiate the initial navigation.\r\n *\r\n * @example\r\n * ```js\r\n * import { START_LOCATION } from 'vue-router'\r\n *\r\n * router.beforeEach((to, from) => {\r\n *   if (from === START_LOCATION) {\r\n *     // initial navigation\r\n *   }\r\n * })\r\n * ```\r\n */\r\nconst START_LOCATION_NORMALIZED = {\r\n    path: '/',\r\n    name: undefined,\r\n    params: {},\r\n    query: {},\r\n    hash: '',\r\n    fullPath: '/',\r\n    matched: [],\r\n    meta: {},\r\n    redirectedFrom: undefined,\r\n};\n\nconst NavigationFailureSymbol = /*#__PURE__*/ PolySymbol((process.env.NODE_ENV !== 'production') ? 'navigation failure' : 'nf');\r\n/**\r\n * Enumeration with all possible types for navigation failures. Can be passed to\r\n * {@link isNavigationFailure} to check for specific failures.\r\n */\r\nvar NavigationFailureType;\r\n(function (NavigationFailureType) {\r\n    /**\r\n     * An aborted navigation is a navigation that failed because a navigation\r\n     * guard returned `false` or called `next(false)`\r\n     */\r\n    NavigationFailureType[NavigationFailureType[\"aborted\"] = 4] = \"aborted\";\r\n    /**\r\n     * A cancelled navigation is a navigation that failed because a more recent\r\n     * navigation finished started (not necessarily finished).\r\n     */\r\n    NavigationFailureType[NavigationFailureType[\"cancelled\"] = 8] = \"cancelled\";\r\n    /**\r\n     * A duplicated navigation is a navigation that failed because it was\r\n     * initiated while already being at the exact same location.\r\n     */\r\n    NavigationFailureType[NavigationFailureType[\"duplicated\"] = 16] = \"duplicated\";\r\n})(NavigationFailureType || (NavigationFailureType = {}));\r\n// DEV only debug messages\r\nconst ErrorTypeMessages = {\r\n    [1 /* MATCHER_NOT_FOUND */]({ location, currentLocation }) {\r\n        return `No match for\\n ${JSON.stringify(location)}${currentLocation\r\n            ? '\\nwhile being at\\n' + JSON.stringify(currentLocation)\r\n            : ''}`;\r\n    },\r\n    [2 /* NAVIGATION_GUARD_REDIRECT */]({ from, to, }) {\r\n        return `Redirected from \"${from.fullPath}\" to \"${stringifyRoute(to)}\" via a navigation guard.`;\r\n    },\r\n    [4 /* NAVIGATION_ABORTED */]({ from, to }) {\r\n        return `Navigation aborted from \"${from.fullPath}\" to \"${to.fullPath}\" via a navigation guard.`;\r\n    },\r\n    [8 /* NAVIGATION_CANCELLED */]({ from, to }) {\r\n        return `Navigation cancelled from \"${from.fullPath}\" to \"${to.fullPath}\" with a new navigation.`;\r\n    },\r\n    [16 /* NAVIGATION_DUPLICATED */]({ from, to }) {\r\n        return `Avoided redundant navigation to current location: \"${from.fullPath}\".`;\r\n    },\r\n};\r\nfunction createRouterError(type, params) {\r\n    if ((process.env.NODE_ENV !== 'production') || !true) {\r\n        return assign(new Error(ErrorTypeMessages[type](params)), {\r\n            type,\r\n            [NavigationFailureSymbol]: true,\r\n        }, params);\r\n    }\r\n    else {\r\n        return assign(new Error(), {\r\n            type,\r\n            [NavigationFailureSymbol]: true,\r\n        }, params);\r\n    }\r\n}\r\nfunction isNavigationFailure(error, type) {\r\n    return (error instanceof Error &&\r\n        NavigationFailureSymbol in error &&\r\n        (type == null || !!(error.type & type)));\r\n}\r\nconst propertiesToLog = ['params', 'query', 'hash'];\r\nfunction stringifyRoute(to) {\r\n    if (typeof to === 'string')\r\n        return to;\r\n    if ('path' in to)\r\n        return to.path;\r\n    const location = {};\r\n    for (const key of propertiesToLog) {\r\n        if (key in to)\r\n            location[key] = to[key];\r\n    }\r\n    return JSON.stringify(location, null, 2);\r\n}\n\n// default pattern for a param: non greedy everything but /\r\nconst BASE_PARAM_PATTERN = '[^/]+?';\r\nconst BASE_PATH_PARSER_OPTIONS = {\r\n    sensitive: false,\r\n    strict: false,\r\n    start: true,\r\n    end: true,\r\n};\r\n// Special Regex characters that must be escaped in static tokens\r\nconst REGEX_CHARS_RE = /[.+*?^${}()[\\]/\\\\]/g;\r\n/**\r\n * Creates a path parser from an array of Segments (a segment is an array of Tokens)\r\n *\r\n * @param segments - array of segments returned by tokenizePath\r\n * @param extraOptions - optional options for the regexp\r\n * @returns a PathParser\r\n */\r\nfunction tokensToParser(segments, extraOptions) {\r\n    const options = assign({}, BASE_PATH_PARSER_OPTIONS, extraOptions);\r\n    // the amount of scores is the same as the length of segments except for the root segment \"/\"\r\n    let score = [];\r\n    // the regexp as a string\r\n    let pattern = options.start ? '^' : '';\r\n    // extracted keys\r\n    const keys = [];\r\n    for (const segment of segments) {\r\n        // the root segment needs special treatment\r\n        const segmentScores = segment.length ? [] : [90 /* Root */];\r\n        // allow trailing slash\r\n        if (options.strict && !segment.length)\r\n            pattern += '/';\r\n        for (let tokenIndex = 0; tokenIndex < segment.length; tokenIndex++) {\r\n            const token = segment[tokenIndex];\r\n            // resets the score if we are inside a sub segment /:a-other-:b\r\n            let subSegmentScore = 40 /* Segment */ +\r\n                (options.sensitive ? 0.25 /* BonusCaseSensitive */ : 0);\r\n            if (token.type === 0 /* Static */) {\r\n                // prepend the slash if we are starting a new segment\r\n                if (!tokenIndex)\r\n                    pattern += '/';\r\n                pattern += token.value.replace(REGEX_CHARS_RE, '\\\\$&');\r\n                subSegmentScore += 40 /* Static */;\r\n            }\r\n            else if (token.type === 1 /* Param */) {\r\n                const { value, repeatable, optional, regexp } = token;\r\n                keys.push({\r\n                    name: value,\r\n                    repeatable,\r\n                    optional,\r\n                });\r\n                const re = regexp ? regexp : BASE_PARAM_PATTERN;\r\n                // the user provided a custom regexp /:id(\\\\d+)\r\n                if (re !== BASE_PARAM_PATTERN) {\r\n                    subSegmentScore += 10 /* BonusCustomRegExp */;\r\n                    // make sure the regexp is valid before using it\r\n                    try {\r\n                        new RegExp(`(${re})`);\r\n                    }\r\n                    catch (err) {\r\n                        throw new Error(`Invalid custom RegExp for param \"${value}\" (${re}): ` +\r\n                            err.message);\r\n                    }\r\n                }\r\n                // when we repeat we must take care of the repeating leading slash\r\n                let subPattern = repeatable ? `((?:${re})(?:/(?:${re}))*)` : `(${re})`;\r\n                // prepend the slash if we are starting a new segment\r\n                if (!tokenIndex)\r\n                    subPattern =\r\n                        // avoid an optional / if there are more segments e.g. /:p?-static\r\n                        // or /:p?-:p2\r\n                        optional && segment.length < 2\r\n                            ? `(?:/${subPattern})`\r\n                            : '/' + subPattern;\r\n                if (optional)\r\n                    subPattern += '?';\r\n                pattern += subPattern;\r\n                subSegmentScore += 20 /* Dynamic */;\r\n                if (optional)\r\n                    subSegmentScore += -8 /* BonusOptional */;\r\n                if (repeatable)\r\n                    subSegmentScore += -20 /* BonusRepeatable */;\r\n                if (re === '.*')\r\n                    subSegmentScore += -50 /* BonusWildcard */;\r\n            }\r\n            segmentScores.push(subSegmentScore);\r\n        }\r\n        // an empty array like /home/ -> [[{home}], []]\r\n        // if (!segment.length) pattern += '/'\r\n        score.push(segmentScores);\r\n    }\r\n    // only apply the strict bonus to the last score\r\n    if (options.strict && options.end) {\r\n        const i = score.length - 1;\r\n        score[i][score[i].length - 1] += 0.7000000000000001 /* BonusStrict */;\r\n    }\r\n    // TODO: dev only warn double trailing slash\r\n    if (!options.strict)\r\n        pattern += '/?';\r\n    if (options.end)\r\n        pattern += '$';\r\n    // allow paths like /dynamic to only match dynamic or dynamic/... but not dynamic_something_else\r\n    else if (options.strict)\r\n        pattern += '(?:/|$)';\r\n    const re = new RegExp(pattern, options.sensitive ? '' : 'i');\r\n    function parse(path) {\r\n        const match = path.match(re);\r\n        const params = {};\r\n        if (!match)\r\n            return null;\r\n        for (let i = 1; i < match.length; i++) {\r\n            const value = match[i] || '';\r\n            const key = keys[i - 1];\r\n            params[key.name] = value && key.repeatable ? value.split('/') : value;\r\n        }\r\n        return params;\r\n    }\r\n    function stringify(params) {\r\n        let path = '';\r\n        // for optional parameters to allow to be empty\r\n        let avoidDuplicatedSlash = false;\r\n        for (const segment of segments) {\r\n            if (!avoidDuplicatedSlash || !path.endsWith('/'))\r\n                path += '/';\r\n            avoidDuplicatedSlash = false;\r\n            for (const token of segment) {\r\n                if (token.type === 0 /* Static */) {\r\n                    path += token.value;\r\n                }\r\n                else if (token.type === 1 /* Param */) {\r\n                    const { value, repeatable, optional } = token;\r\n                    const param = value in params ? params[value] : '';\r\n                    if (Array.isArray(param) && !repeatable)\r\n                        throw new Error(`Provided param \"${value}\" is an array but it is not repeatable (* or + modifiers)`);\r\n                    const text = Array.isArray(param) ? param.join('/') : param;\r\n                    if (!text) {\r\n                        if (optional) {\r\n                            // if we have more than one optional param like /:a?-static we\r\n                            // don't need to care about the optional param\r\n                            if (segment.length < 2) {\r\n                                // remove the last slash as we could be at the end\r\n                                if (path.endsWith('/'))\r\n                                    path = path.slice(0, -1);\r\n                                // do not append a slash on the next iteration\r\n                                else\r\n                                    avoidDuplicatedSlash = true;\r\n                            }\r\n                        }\r\n                        else\r\n                            throw new Error(`Missing required param \"${value}\"`);\r\n                    }\r\n                    path += text;\r\n                }\r\n            }\r\n        }\r\n        return path;\r\n    }\r\n    return {\r\n        re,\r\n        score,\r\n        keys,\r\n        parse,\r\n        stringify,\r\n    };\r\n}\r\n/**\r\n * Compares an array of numbers as used in PathParser.score and returns a\r\n * number. This function can be used to `sort` an array\r\n * @param a - first array of numbers\r\n * @param b - second array of numbers\r\n * @returns 0 if both are equal, < 0 if a should be sorted first, > 0 if b\r\n * should be sorted first\r\n */\r\nfunction compareScoreArray(a, b) {\r\n    let i = 0;\r\n    while (i < a.length && i < b.length) {\r\n        const diff = b[i] - a[i];\r\n        // only keep going if diff === 0\r\n        if (diff)\r\n            return diff;\r\n        i++;\r\n    }\r\n    // if the last subsegment was Static, the shorter segments should be sorted first\r\n    // otherwise sort the longest segment first\r\n    if (a.length < b.length) {\r\n        return a.length === 1 && a[0] === 40 /* Static */ + 40 /* Segment */\r\n            ? -1\r\n            : 1;\r\n    }\r\n    else if (a.length > b.length) {\r\n        return b.length === 1 && b[0] === 40 /* Static */ + 40 /* Segment */\r\n            ? 1\r\n            : -1;\r\n    }\r\n    return 0;\r\n}\r\n/**\r\n * Compare function that can be used with `sort` to sort an array of PathParser\r\n * @param a - first PathParser\r\n * @param b - second PathParser\r\n * @returns 0 if both are equal, < 0 if a should be sorted first, > 0 if b\r\n */\r\nfunction comparePathParserScore(a, b) {\r\n    let i = 0;\r\n    const aScore = a.score;\r\n    const bScore = b.score;\r\n    while (i < aScore.length && i < bScore.length) {\r\n        const comp = compareScoreArray(aScore[i], bScore[i]);\r\n        // do not return if both are equal\r\n        if (comp)\r\n            return comp;\r\n        i++;\r\n    }\r\n    // if a and b share the same score entries but b has more, sort b first\r\n    return bScore.length - aScore.length;\r\n    // this is the ternary version\r\n    // return aScore.length < bScore.length\r\n    //   ? 1\r\n    //   : aScore.length > bScore.length\r\n    //   ? -1\r\n    //   : 0\r\n}\n\nconst ROOT_TOKEN = {\r\n    type: 0 /* Static */,\r\n    value: '',\r\n};\r\nconst VALID_PARAM_RE = /[a-zA-Z0-9_]/;\r\n// After some profiling, the cache seems to be unnecessary because tokenizePath\r\n// (the slowest part of adding a route) is very fast\r\n// const tokenCache = new Map<string, Token[][]>()\r\nfunction tokenizePath(path) {\r\n    if (!path)\r\n        return [[]];\r\n    if (path === '/')\r\n        return [[ROOT_TOKEN]];\r\n    if (!path.startsWith('/')) {\r\n        throw new Error((process.env.NODE_ENV !== 'production')\r\n            ? `Route paths should start with a \"/\": \"${path}\" should be \"/${path}\".`\r\n            : `Invalid path \"${path}\"`);\r\n    }\r\n    // if (tokenCache.has(path)) return tokenCache.get(path)!\r\n    function crash(message) {\r\n        throw new Error(`ERR (${state})/\"${buffer}\": ${message}`);\r\n    }\r\n    let state = 0 /* Static */;\r\n    let previousState = state;\r\n    const tokens = [];\r\n    // the segment will always be valid because we get into the initial state\r\n    // with the leading /\r\n    let segment;\r\n    function finalizeSegment() {\r\n        if (segment)\r\n            tokens.push(segment);\r\n        segment = [];\r\n    }\r\n    // index on the path\r\n    let i = 0;\r\n    // char at index\r\n    let char;\r\n    // buffer of the value read\r\n    let buffer = '';\r\n    // custom regexp for a param\r\n    let customRe = '';\r\n    function consumeBuffer() {\r\n        if (!buffer)\r\n            return;\r\n        if (state === 0 /* Static */) {\r\n            segment.push({\r\n                type: 0 /* Static */,\r\n                value: buffer,\r\n            });\r\n        }\r\n        else if (state === 1 /* Param */ ||\r\n            state === 2 /* ParamRegExp */ ||\r\n            state === 3 /* ParamRegExpEnd */) {\r\n            if (segment.length > 1 && (char === '*' || char === '+'))\r\n                crash(`A repeatable param (${buffer}) must be alone in its segment. eg: '/:ids+.`);\r\n            segment.push({\r\n                type: 1 /* Param */,\r\n                value: buffer,\r\n                regexp: customRe,\r\n                repeatable: char === '*' || char === '+',\r\n                optional: char === '*' || char === '?',\r\n            });\r\n        }\r\n        else {\r\n            crash('Invalid state to consume buffer');\r\n        }\r\n        buffer = '';\r\n    }\r\n    function addCharToBuffer() {\r\n        buffer += char;\r\n    }\r\n    while (i < path.length) {\r\n        char = path[i++];\r\n        if (char === '\\\\' && state !== 2 /* ParamRegExp */) {\r\n            previousState = state;\r\n            state = 4 /* EscapeNext */;\r\n            continue;\r\n        }\r\n        switch (state) {\r\n            case 0 /* Static */:\r\n                if (char === '/') {\r\n                    if (buffer) {\r\n                        consumeBuffer();\r\n                    }\r\n                    finalizeSegment();\r\n                }\r\n                else if (char === ':') {\r\n                    consumeBuffer();\r\n                    state = 1 /* Param */;\r\n                }\r\n                else {\r\n                    addCharToBuffer();\r\n                }\r\n                break;\r\n            case 4 /* EscapeNext */:\r\n                addCharToBuffer();\r\n                state = previousState;\r\n                break;\r\n            case 1 /* Param */:\r\n                if (char === '(') {\r\n                    state = 2 /* ParamRegExp */;\r\n                }\r\n                else if (VALID_PARAM_RE.test(char)) {\r\n                    addCharToBuffer();\r\n                }\r\n                else {\r\n                    consumeBuffer();\r\n                    state = 0 /* Static */;\r\n                    // go back one character if we were not modifying\r\n                    if (char !== '*' && char !== '?' && char !== '+')\r\n                        i--;\r\n                }\r\n                break;\r\n            case 2 /* ParamRegExp */:\r\n                // TODO: is it worth handling nested regexp? like :p(?:prefix_([^/]+)_suffix)\r\n                // it already works by escaping the closing )\r\n                // https://paths.esm.dev/?p=AAMeJbiAwQEcDKbAoAAkP60PG2R6QAvgNaA6AFACM2ABuQBB#\r\n                // is this really something people need since you can also write\r\n                // /prefix_:p()_suffix\r\n                if (char === ')') {\r\n                    // handle the escaped )\r\n                    if (customRe[customRe.length - 1] == '\\\\')\r\n                        customRe = customRe.slice(0, -1) + char;\r\n                    else\r\n                        state = 3 /* ParamRegExpEnd */;\r\n                }\r\n                else {\r\n                    customRe += char;\r\n                }\r\n                break;\r\n            case 3 /* ParamRegExpEnd */:\r\n                // same as finalizing a param\r\n                consumeBuffer();\r\n                state = 0 /* Static */;\r\n                // go back one character if we were not modifying\r\n                if (char !== '*' && char !== '?' && char !== '+')\r\n                    i--;\r\n                customRe = '';\r\n                break;\r\n            default:\r\n                crash('Unknown state');\r\n                break;\r\n        }\r\n    }\r\n    if (state === 2 /* ParamRegExp */)\r\n        crash(`Unfinished custom RegExp for param \"${buffer}\"`);\r\n    consumeBuffer();\r\n    finalizeSegment();\r\n    // tokenCache.set(path, tokens)\r\n    return tokens;\r\n}\n\nfunction createRouteRecordMatcher(record, parent, options) {\r\n    const parser = tokensToParser(tokenizePath(record.path), options);\r\n    // warn against params with the same name\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        const existingKeys = new Set();\r\n        for (const key of parser.keys) {\r\n            if (existingKeys.has(key.name))\r\n                warn(`Found duplicated params with name \"${key.name}\" for path \"${record.path}\". Only the last one will be available on \"$route.params\".`);\r\n            existingKeys.add(key.name);\r\n        }\r\n    }\r\n    const matcher = assign(parser, {\r\n        record,\r\n        parent,\r\n        // these needs to be populated by the parent\r\n        children: [],\r\n        alias: [],\r\n    });\r\n    if (parent) {\r\n        // both are aliases or both are not aliases\r\n        // we don't want to mix them because the order is used when\r\n        // passing originalRecord in Matcher.addRoute\r\n        if (!matcher.record.aliasOf === !parent.record.aliasOf)\r\n            parent.children.push(matcher);\r\n    }\r\n    return matcher;\r\n}\n\n/**\r\n * Creates a Router Matcher.\r\n *\r\n * @internal\r\n * @param routes - array of initial routes\r\n * @param globalOptions - global route options\r\n */\r\nfunction createRouterMatcher(routes, globalOptions) {\r\n    // normalized ordered array of matchers\r\n    const matchers = [];\r\n    const matcherMap = new Map();\r\n    globalOptions = mergeOptions({ strict: false, end: true, sensitive: false }, globalOptions);\r\n    function getRecordMatcher(name) {\r\n        return matcherMap.get(name);\r\n    }\r\n    function addRoute(record, parent, originalRecord) {\r\n        // used later on to remove by name\r\n        let isRootAdd = !originalRecord;\r\n        let mainNormalizedRecord = normalizeRouteRecord(record);\r\n        // we might be the child of an alias\r\n        mainNormalizedRecord.aliasOf = originalRecord && originalRecord.record;\r\n        const options = mergeOptions(globalOptions, record);\r\n        // generate an array of records to correctly handle aliases\r\n        const normalizedRecords = [\r\n            mainNormalizedRecord,\r\n        ];\r\n        if ('alias' in record) {\r\n            const aliases = typeof record.alias === 'string' ? [record.alias] : record.alias;\r\n            for (const alias of aliases) {\r\n                normalizedRecords.push(assign({}, mainNormalizedRecord, {\r\n                    // this allows us to hold a copy of the `components` option\r\n                    // so that async components cache is hold on the original record\r\n                    components: originalRecord\r\n                        ? originalRecord.record.components\r\n                        : mainNormalizedRecord.components,\r\n                    path: alias,\r\n                    // we might be the child of an alias\r\n                    aliasOf: originalRecord\r\n                        ? originalRecord.record\r\n                        : mainNormalizedRecord,\r\n                    // the aliases are always of the same kind as the original since they\r\n                    // are defined on the same record\r\n                }));\r\n            }\r\n        }\r\n        let matcher;\r\n        let originalMatcher;\r\n        for (const normalizedRecord of normalizedRecords) {\r\n            let { path } = normalizedRecord;\r\n            // Build up the path for nested routes if the child isn't an absolute\r\n            // route. Only add the / delimiter if the child path isn't empty and if the\r\n            // parent path doesn't have a trailing slash\r\n            if (parent && path[0] !== '/') {\r\n                let parentPath = parent.record.path;\r\n                let connectingSlash = parentPath[parentPath.length - 1] === '/' ? '' : '/';\r\n                normalizedRecord.path =\r\n                    parent.record.path + (path && connectingSlash + path);\r\n            }\r\n            if ((process.env.NODE_ENV !== 'production') && normalizedRecord.path === '*') {\r\n                throw new Error('Catch all routes (\"*\") must now be defined using a param with a custom regexp.\\n' +\r\n                    'See more at https://next.router.vuejs.org/guide/migration/#removed-star-or-catch-all-routes.');\r\n            }\r\n            // create the object before hand so it can be passed to children\r\n            matcher = createRouteRecordMatcher(normalizedRecord, parent, options);\r\n            if ((process.env.NODE_ENV !== 'production') && parent && path[0] === '/')\r\n                checkMissingParamsInAbsolutePath(matcher, parent);\r\n            // if we are an alias we must tell the original record that we exist\r\n            // so we can be removed\r\n            if (originalRecord) {\r\n                originalRecord.alias.push(matcher);\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    checkSameParams(originalRecord, matcher);\r\n                }\r\n            }\r\n            else {\r\n                // otherwise, the first record is the original and others are aliases\r\n                originalMatcher = originalMatcher || matcher;\r\n                if (originalMatcher !== matcher)\r\n                    originalMatcher.alias.push(matcher);\r\n                // remove the route if named and only for the top record (avoid in nested calls)\r\n                // this works because the original record is the first one\r\n                if (isRootAdd && record.name && !isAliasRecord(matcher))\r\n                    removeRoute(record.name);\r\n            }\r\n            if ('children' in mainNormalizedRecord) {\r\n                let children = mainNormalizedRecord.children;\r\n                for (let i = 0; i < children.length; i++) {\r\n                    addRoute(children[i], matcher, originalRecord && originalRecord.children[i]);\r\n                }\r\n            }\r\n            // if there was no original record, then the first one was not an alias and all\r\n            // other alias (if any) need to reference this record when adding children\r\n            originalRecord = originalRecord || matcher;\r\n            // TODO: add normalized records for more flexibility\r\n            // if (parent && isAliasRecord(originalRecord)) {\r\n            //   parent.children.push(originalRecord)\r\n            // }\r\n            insertMatcher(matcher);\r\n        }\r\n        return originalMatcher\r\n            ? () => {\r\n                // since other matchers are aliases, they should be removed by the original matcher\r\n                removeRoute(originalMatcher);\r\n            }\r\n            : noop;\r\n    }\r\n    function removeRoute(matcherRef) {\r\n        if (isRouteName(matcherRef)) {\r\n            const matcher = matcherMap.get(matcherRef);\r\n            if (matcher) {\r\n                matcherMap.delete(matcherRef);\r\n                matchers.splice(matchers.indexOf(matcher), 1);\r\n                matcher.children.forEach(removeRoute);\r\n                matcher.alias.forEach(removeRoute);\r\n            }\r\n        }\r\n        else {\r\n            let index = matchers.indexOf(matcherRef);\r\n            if (index > -1) {\r\n                matchers.splice(index, 1);\r\n                if (matcherRef.record.name)\r\n                    matcherMap.delete(matcherRef.record.name);\r\n                matcherRef.children.forEach(removeRoute);\r\n                matcherRef.alias.forEach(removeRoute);\r\n            }\r\n        }\r\n    }\r\n    function getRoutes() {\r\n        return matchers;\r\n    }\r\n    function insertMatcher(matcher) {\r\n        let i = 0;\r\n        // console.log('i is', { i })\r\n        while (i < matchers.length &&\r\n            comparePathParserScore(matcher, matchers[i]) >= 0)\r\n            i++;\r\n        // console.log('END i is', { i })\r\n        // while (i < matchers.length && matcher.score <= matchers[i].score) i++\r\n        matchers.splice(i, 0, matcher);\r\n        // only add the original record to the name map\r\n        if (matcher.record.name && !isAliasRecord(matcher))\r\n            matcherMap.set(matcher.record.name, matcher);\r\n    }\r\n    function resolve(location, currentLocation) {\r\n        let matcher;\r\n        let params = {};\r\n        let path;\r\n        let name;\r\n        if ('name' in location && location.name) {\r\n            matcher = matcherMap.get(location.name);\r\n            if (!matcher)\r\n                throw createRouterError(1 /* MATCHER_NOT_FOUND */, {\r\n                    location,\r\n                });\r\n            name = matcher.record.name;\r\n            params = assign(\r\n            // paramsFromLocation is a new object\r\n            paramsFromLocation(currentLocation.params, \r\n            // only keep params that exist in the resolved location\r\n            // TODO: only keep optional params coming from a parent record\r\n            matcher.keys.filter(k => !k.optional).map(k => k.name)), location.params);\r\n            // throws if cannot be stringified\r\n            path = matcher.stringify(params);\r\n        }\r\n        else if ('path' in location) {\r\n            // no need to resolve the path with the matcher as it was provided\r\n            // this also allows the user to control the encoding\r\n            path = location.path;\r\n            if ((process.env.NODE_ENV !== 'production') && !path.startsWith('/')) {\r\n                warn(`The Matcher cannot resolve relative paths but received \"${path}\". Unless you directly called \\`matcher.resolve(\"${path}\")\\`, this is probably a bug in vue-router. Please open an issue at https://new-issue.vuejs.org/?repo=vuejs/vue-router-next.`);\r\n            }\r\n            matcher = matchers.find(m => m.re.test(path));\r\n            // matcher should have a value after the loop\r\n            if (matcher) {\r\n                // TODO: dev warning of unused params if provided\r\n                // we know the matcher works because we tested the regexp\r\n                params = matcher.parse(path);\r\n                name = matcher.record.name;\r\n            }\r\n            // location is a relative path\r\n        }\r\n        else {\r\n            // match by name or path of current route\r\n            matcher = currentLocation.name\r\n                ? matcherMap.get(currentLocation.name)\r\n                : matchers.find(m => m.re.test(currentLocation.path));\r\n            if (!matcher)\r\n                throw createRouterError(1 /* MATCHER_NOT_FOUND */, {\r\n                    location,\r\n                    currentLocation,\r\n                });\r\n            name = matcher.record.name;\r\n            // since we are navigating to the same location, we don't need to pick the\r\n            // params like when `name` is provided\r\n            params = assign({}, currentLocation.params, location.params);\r\n            path = matcher.stringify(params);\r\n        }\r\n        const matched = [];\r\n        let parentMatcher = matcher;\r\n        while (parentMatcher) {\r\n            // reversed order so parents are at the beginning\r\n            matched.unshift(parentMatcher.record);\r\n            parentMatcher = parentMatcher.parent;\r\n        }\r\n        return {\r\n            name,\r\n            path,\r\n            params,\r\n            matched,\r\n            meta: mergeMetaFields(matched),\r\n        };\r\n    }\r\n    // add initial routes\r\n    routes.forEach(route => addRoute(route));\r\n    return { addRoute, resolve, removeRoute, getRoutes, getRecordMatcher };\r\n}\r\nfunction paramsFromLocation(params, keys) {\r\n    let newParams = {};\r\n    for (let key of keys) {\r\n        if (key in params)\r\n            newParams[key] = params[key];\r\n    }\r\n    return newParams;\r\n}\r\n/**\r\n * Normalizes a RouteRecordRaw. Creates a copy\r\n *\r\n * @param record\r\n * @returns the normalized version\r\n */\r\nfunction normalizeRouteRecord(record) {\r\n    return {\r\n        path: record.path,\r\n        redirect: record.redirect,\r\n        name: record.name,\r\n        meta: record.meta || {},\r\n        aliasOf: undefined,\r\n        beforeEnter: record.beforeEnter,\r\n        props: normalizeRecordProps(record),\r\n        children: record.children || [],\r\n        instances: {},\r\n        leaveGuards: new Set(),\r\n        updateGuards: new Set(),\r\n        enterCallbacks: {},\r\n        components: 'components' in record\r\n            ? record.components || {}\r\n            : { default: record.component },\r\n    };\r\n}\r\n/**\r\n * Normalize the optional `props` in a record to always be an object similar to\r\n * components. Also accept a boolean for components.\r\n * @param record\r\n */\r\nfunction normalizeRecordProps(record) {\r\n    const propsObject = {};\r\n    // props does not exist on redirect records but we can set false directly\r\n    const props = record.props || false;\r\n    if ('component' in record) {\r\n        propsObject.default = props;\r\n    }\r\n    else {\r\n        // NOTE: we could also allow a function to be applied to every component.\r\n        // Would need user feedback for use cases\r\n        for (let name in record.components)\r\n            propsObject[name] = typeof props === 'boolean' ? props : props[name];\r\n    }\r\n    return propsObject;\r\n}\r\n/**\r\n * Checks if a record or any of its parent is an alias\r\n * @param record\r\n */\r\nfunction isAliasRecord(record) {\r\n    while (record) {\r\n        if (record.record.aliasOf)\r\n            return true;\r\n        record = record.parent;\r\n    }\r\n    return false;\r\n}\r\n/**\r\n * Merge meta fields of an array of records\r\n *\r\n * @param matched - array of matched records\r\n */\r\nfunction mergeMetaFields(matched) {\r\n    return matched.reduce((meta, record) => assign(meta, record.meta), {});\r\n}\r\nfunction mergeOptions(defaults, partialOptions) {\r\n    let options = {};\r\n    for (let key in defaults) {\r\n        options[key] =\r\n            key in partialOptions ? partialOptions[key] : defaults[key];\r\n    }\r\n    return options;\r\n}\r\nfunction isSameParam(a, b) {\r\n    return (a.name === b.name &&\r\n        a.optional === b.optional &&\r\n        a.repeatable === b.repeatable);\r\n}\r\n/**\r\n * Check if a path and its alias have the same required params\r\n *\r\n * @param a - original record\r\n * @param b - alias record\r\n */\r\nfunction checkSameParams(a, b) {\r\n    for (let key of a.keys) {\r\n        if (!key.optional && !b.keys.find(isSameParam.bind(null, key)))\r\n            return warn(`Alias \"${b.record.path}\" and the original record: \"${a.record.path}\" should have the exact same param named \"${key.name}\"`);\r\n    }\r\n    for (let key of b.keys) {\r\n        if (!key.optional && !a.keys.find(isSameParam.bind(null, key)))\r\n            return warn(`Alias \"${b.record.path}\" and the original record: \"${a.record.path}\" should have the exact same param named \"${key.name}\"`);\r\n    }\r\n}\r\nfunction checkMissingParamsInAbsolutePath(record, parent) {\r\n    for (let key of parent.keys) {\r\n        if (!record.keys.find(isSameParam.bind(null, key)))\r\n            return warn(`Absolute path \"${record.record.path}\" should have the exact same param named \"${key.name}\" as its parent \"${parent.record.path}\".`);\r\n    }\r\n}\n\n/**\r\n * Encoding Rules ␣ = Space Path: ␣ \" < > # ? { } Query: ␣ \" < > # & = Hash: ␣ \"\r\n * < > `\r\n *\r\n * On top of that, the RFC3986 (https://tools.ietf.org/html/rfc3986#section-2.2)\r\n * defines some extra characters to be encoded. Most browsers do not encode them\r\n * in encodeURI https://github.com/whatwg/url/issues/369, so it may be safer to\r\n * also encode `!'()*`. Leaving unencoded only ASCII alphanumeric(`a-zA-Z0-9`)\r\n * plus `-._~`. This extra safety should be applied to query by patching the\r\n * string returned by encodeURIComponent encodeURI also encodes `[\\]^`. `\\`\r\n * should be encoded to avoid ambiguity. Browsers (IE, FF, C) transform a `\\`\r\n * into a `/` if directly typed in. The _backtick_ (`````) should also be\r\n * encoded everywhere because some browsers like FF encode it when directly\r\n * written while others don't. Safari and IE don't encode ``\"<>{}``` in hash.\r\n */\r\n// const EXTRA_RESERVED_RE = /[!'()*]/g\r\n// const encodeReservedReplacer = (c: string) => '%' + c.charCodeAt(0).toString(16)\r\nconst HASH_RE = /#/g; // %23\r\nconst AMPERSAND_RE = /&/g; // %26\r\nconst SLASH_RE = /\\//g; // %2F\r\nconst EQUAL_RE = /=/g; // %3D\r\nconst IM_RE = /\\?/g; // %3F\r\nconst PLUS_RE = /\\+/g; // %2B\r\n/**\r\n * NOTE: It's not clear to me if we should encode the + symbol in queries, it\r\n * seems to be less flexible than not doing so and I can't find out the legacy\r\n * systems requiring this for regular requests like text/html. In the standard,\r\n * the encoding of the plus character is only mentioned for\r\n * application/x-www-form-urlencoded\r\n * (https://url.spec.whatwg.org/#urlencoded-parsing) and most browsers seems lo\r\n * leave the plus character as is in queries. To be more flexible, we allow the\r\n * plus character on the query but it can also be manually encoded by the user.\r\n *\r\n * Resources:\r\n * - https://url.spec.whatwg.org/#urlencoded-parsing\r\n * - https://stackoverflow.com/questions/1634271/url-encoding-the-space-character-or-20\r\n */\r\nconst ENC_BRACKET_OPEN_RE = /%5B/g; // [\r\nconst ENC_BRACKET_CLOSE_RE = /%5D/g; // ]\r\nconst ENC_CARET_RE = /%5E/g; // ^\r\nconst ENC_BACKTICK_RE = /%60/g; // `\r\nconst ENC_CURLY_OPEN_RE = /%7B/g; // {\r\nconst ENC_PIPE_RE = /%7C/g; // |\r\nconst ENC_CURLY_CLOSE_RE = /%7D/g; // }\r\nconst ENC_SPACE_RE = /%20/g; // }\r\n/**\r\n * Encode characters that need to be encoded on the path, search and hash\r\n * sections of the URL.\r\n *\r\n * @internal\r\n * @param text - string to encode\r\n * @returns encoded string\r\n */\r\nfunction commonEncode(text) {\r\n    return encodeURI('' + text)\r\n        .replace(ENC_PIPE_RE, '|')\r\n        .replace(ENC_BRACKET_OPEN_RE, '[')\r\n        .replace(ENC_BRACKET_CLOSE_RE, ']');\r\n}\r\n/**\r\n * Encode characters that need to be encoded on the hash section of the URL.\r\n *\r\n * @param text - string to encode\r\n * @returns encoded string\r\n */\r\nfunction encodeHash(text) {\r\n    return commonEncode(text)\r\n        .replace(ENC_CURLY_OPEN_RE, '{')\r\n        .replace(ENC_CURLY_CLOSE_RE, '}')\r\n        .replace(ENC_CARET_RE, '^');\r\n}\r\n/**\r\n * Encode characters that need to be encoded query values on the query\r\n * section of the URL.\r\n *\r\n * @param text - string to encode\r\n * @returns encoded string\r\n */\r\nfunction encodeQueryValue(text) {\r\n    return (commonEncode(text)\r\n        // Encode the space as +, encode the + to differentiate it from the space\r\n        .replace(PLUS_RE, '%2B')\r\n        .replace(ENC_SPACE_RE, '+')\r\n        .replace(HASH_RE, '%23')\r\n        .replace(AMPERSAND_RE, '%26')\r\n        .replace(ENC_BACKTICK_RE, '`')\r\n        .replace(ENC_CURLY_OPEN_RE, '{')\r\n        .replace(ENC_CURLY_CLOSE_RE, '}')\r\n        .replace(ENC_CARET_RE, '^'));\r\n}\r\n/**\r\n * Like `encodeQueryValue` but also encodes the `=` character.\r\n *\r\n * @param text - string to encode\r\n */\r\nfunction encodeQueryKey(text) {\r\n    return encodeQueryValue(text).replace(EQUAL_RE, '%3D');\r\n}\r\n/**\r\n * Encode characters that need to be encoded on the path section of the URL.\r\n *\r\n * @param text - string to encode\r\n * @returns encoded string\r\n */\r\nfunction encodePath(text) {\r\n    return commonEncode(text).replace(HASH_RE, '%23').replace(IM_RE, '%3F');\r\n}\r\n/**\r\n * Encode characters that need to be encoded on the path section of the URL as a\r\n * param. This function encodes everything {@link encodePath} does plus the\r\n * slash (`/`) character.\r\n *\r\n * @param text - string to encode\r\n * @returns encoded string\r\n */\r\nfunction encodeParam(text) {\r\n    return encodePath(text).replace(SLASH_RE, '%2F');\r\n}\r\n/**\r\n * Decode text using `decodeURIComponent`. Returns the original text if it\r\n * fails.\r\n *\r\n * @param text - string to decode\r\n * @returns decoded string\r\n */\r\nfunction decode(text) {\r\n    try {\r\n        return decodeURIComponent('' + text);\r\n    }\r\n    catch (err) {\r\n        (process.env.NODE_ENV !== 'production') && warn(`Error decoding \"${text}\". Using original value`);\r\n    }\r\n    return '' + text;\r\n}\n\n/**\r\n * Transforms a queryString into a {@link LocationQuery} object. Accept both, a\r\n * version with the leading `?` and without Should work as URLSearchParams\r\n\n * @internal\r\n *\r\n * @param search - search string to parse\r\n * @returns a query object\r\n */\r\nfunction parseQuery(search) {\r\n    const query = {};\r\n    // avoid creating an object with an empty key and empty value\r\n    // because of split('&')\r\n    if (search === '' || search === '?')\r\n        return query;\r\n    const hasLeadingIM = search[0] === '?';\r\n    const searchParams = (hasLeadingIM ? search.slice(1) : search).split('&');\r\n    for (let i = 0; i < searchParams.length; ++i) {\r\n        // pre decode the + into space\r\n        const searchParam = searchParams[i].replace(PLUS_RE, ' ');\r\n        // allow the = character\r\n        let eqPos = searchParam.indexOf('=');\r\n        let key = decode(eqPos < 0 ? searchParam : searchParam.slice(0, eqPos));\r\n        let value = eqPos < 0 ? null : decode(searchParam.slice(eqPos + 1));\r\n        if (key in query) {\r\n            // an extra variable for ts types\r\n            let currentValue = query[key];\r\n            if (!Array.isArray(currentValue)) {\r\n                currentValue = query[key] = [currentValue];\r\n            }\r\n            currentValue.push(value);\r\n        }\r\n        else {\r\n            query[key] = value;\r\n        }\r\n    }\r\n    return query;\r\n}\r\n/**\r\n * Stringifies a {@link LocationQueryRaw} object. Like `URLSearchParams`, it\r\n * doesn't prepend a `?`\r\n *\r\n * @internal\r\n *\r\n * @param query - query object to stringify\r\n * @returns string version of the query without the leading `?`\r\n */\r\nfunction stringifyQuery(query) {\r\n    let search = '';\r\n    for (let key in query) {\r\n        if (search.length)\r\n            search += '&';\r\n        const value = query[key];\r\n        key = encodeQueryKey(key);\r\n        if (value == null) {\r\n            // only null adds the value\r\n            if (value !== undefined)\r\n                search += key;\r\n            continue;\r\n        }\r\n        // keep null values\r\n        let values = Array.isArray(value)\r\n            ? value.map(v => v && encodeQueryValue(v))\r\n            : [value && encodeQueryValue(value)];\r\n        for (let i = 0; i < values.length; i++) {\r\n            // only append & with i > 0\r\n            search += (i ? '&' : '') + key;\r\n            if (values[i] != null)\r\n                search += ('=' + values[i]);\r\n        }\r\n    }\r\n    return search;\r\n}\r\n/**\r\n * Transforms a {@link LocationQueryRaw} into a {@link LocationQuery} by casting\r\n * numbers into strings, removing keys with an undefined value and replacing\r\n * undefined with null in arrays\r\n *\r\n * @param query - query object to normalize\r\n * @returns a normalized query object\r\n */\r\nfunction normalizeQuery(query) {\r\n    const normalizedQuery = {};\r\n    for (let key in query) {\r\n        let value = query[key];\r\n        if (value !== undefined) {\r\n            normalizedQuery[key] = Array.isArray(value)\r\n                ? value.map(v => (v == null ? null : '' + v))\r\n                : value == null\r\n                    ? value\r\n                    : '' + value;\r\n        }\r\n    }\r\n    return normalizedQuery;\r\n}\n\n/**\r\n * Create a list of callbacks that can be reset. Used to create before and after navigation guards list\r\n */\r\nfunction useCallbacks() {\r\n    let handlers = [];\r\n    function add(handler) {\r\n        handlers.push(handler);\r\n        return () => {\r\n            const i = handlers.indexOf(handler);\r\n            if (i > -1)\r\n                handlers.splice(i, 1);\r\n        };\r\n    }\r\n    function reset() {\r\n        handlers = [];\r\n    }\r\n    return {\r\n        add,\r\n        list: () => handlers,\r\n        reset,\r\n    };\r\n}\n\nfunction registerGuard(record, name, guard) {\r\n    const removeFromList = () => {\r\n        record[name].delete(guard);\r\n    };\r\n    onUnmounted(removeFromList);\r\n    onDeactivated(removeFromList);\r\n    onActivated(() => {\r\n        record[name].add(guard);\r\n    });\r\n    record[name].add(guard);\r\n}\r\n/**\r\n * Add a navigation guard that triggers whenever the component for the current\r\n * location is about to be left. Similar to {@link beforeRouteLeave} but can be\r\n * used in any component. The guard is removed when the component is unmounted.\r\n *\r\n * @param leaveGuard - {@link NavigationGuard}\r\n */\r\nfunction onBeforeRouteLeave(leaveGuard) {\r\n    if ((process.env.NODE_ENV !== 'production') && !getCurrentInstance()) {\r\n        warn('getCurrentInstance() returned null. onBeforeRouteLeave() must be called at the top of a setup function');\r\n        return;\r\n    }\r\n    const activeRecord = inject(matchedRouteKey, {}).value;\r\n    if (!activeRecord) {\r\n        (process.env.NODE_ENV !== 'production') &&\r\n            warn('No active route record was found. Are you missing a <router-view> component?');\r\n        return;\r\n    }\r\n    registerGuard(activeRecord, 'leaveGuards', leaveGuard);\r\n}\r\n/**\r\n * Add a navigation guard that triggers whenever the current location is about\r\n * to be updated. Similar to {@link beforeRouteUpdate} but can be used in any\r\n * component. The guard is removed when the component is unmounted.\r\n *\r\n * @param updateGuard - {@link NavigationGuard}\r\n */\r\nfunction onBeforeRouteUpdate(updateGuard) {\r\n    if ((process.env.NODE_ENV !== 'production') && !getCurrentInstance()) {\r\n        warn('getCurrentInstance() returned null. onBeforeRouteUpdate() must be called at the top of a setup function');\r\n        return;\r\n    }\r\n    const activeRecord = inject(matchedRouteKey, {}).value;\r\n    if (!activeRecord) {\r\n        (process.env.NODE_ENV !== 'production') &&\r\n            warn('No active route record was found. Are you missing a <router-view> component?');\r\n        return;\r\n    }\r\n    registerGuard(activeRecord, 'updateGuards', updateGuard);\r\n}\r\nfunction guardToPromiseFn(guard, to, from, record, name) {\r\n    // keep a reference to the enterCallbackArray to prevent pushing callbacks if a new navigation took place\r\n    const enterCallbackArray = record &&\r\n        // name is defined if record is because of the function overload\r\n        (record.enterCallbacks[name] = record.enterCallbacks[name] || []);\r\n    return () => new Promise((resolve, reject) => {\r\n        const next = (valid) => {\r\n            if (valid === false)\r\n                reject(createRouterError(4 /* NAVIGATION_ABORTED */, {\r\n                    from,\r\n                    to,\r\n                }));\r\n            else if (valid instanceof Error) {\r\n                reject(valid);\r\n            }\r\n            else if (isRouteLocation(valid)) {\r\n                reject(createRouterError(2 /* NAVIGATION_GUARD_REDIRECT */, {\r\n                    from: to,\r\n                    to: valid,\r\n                }));\r\n            }\r\n            else {\r\n                if (enterCallbackArray &&\r\n                    // since enterCallbackArray is truthy, both record and name also are\r\n                    record.enterCallbacks[name] === enterCallbackArray &&\r\n                    typeof valid === 'function')\r\n                    enterCallbackArray.push(valid);\r\n                resolve();\r\n            }\r\n        };\r\n        // wrapping with Promise.resolve allows it to work with both async and sync guards\r\n        const guardReturn = guard.call(record && record.instances[name], to, from, (process.env.NODE_ENV !== 'production') ? canOnlyBeCalledOnce(next, to, from) : next);\r\n        let guardCall = Promise.resolve(guardReturn);\r\n        if (guard.length < 3)\r\n            guardCall = guardCall.then(next);\r\n        if ((process.env.NODE_ENV !== 'production') && guard.length > 2) {\r\n            const message = `The \"next\" callback was never called inside of ${guard.name ? '\"' + guard.name + '\"' : ''}:\\n${guard.toString()}\\n. If you are returning a value instead of calling \"next\", make sure to remove the \"next\" parameter from your function.`;\r\n            if (typeof guardReturn === 'object' && 'then' in guardReturn) {\r\n                guardCall = guardCall.then(resolvedValue => {\r\n                    // @ts-ignore: _called is added at canOnlyBeCalledOnce\r\n                    if (!next._called) {\r\n                        warn(message);\r\n                        return Promise.reject(new Error('Invalid navigation guard'));\r\n                    }\r\n                    return resolvedValue;\r\n                });\r\n                // TODO: test me!\r\n            }\r\n            else if (guardReturn !== undefined) {\r\n                // @ts-ignore: _called is added at canOnlyBeCalledOnce\r\n                if (!next._called) {\r\n                    warn(message);\r\n                    reject(new Error('Invalid navigation guard'));\r\n                    return;\r\n                }\r\n            }\r\n        }\r\n        guardCall.catch(err => reject(err));\r\n    });\r\n}\r\nfunction canOnlyBeCalledOnce(next, to, from) {\r\n    let called = 0;\r\n    return function () {\r\n        if (called++ === 1)\r\n            warn(`The \"next\" callback was called more than once in one navigation guard when going from \"${from.fullPath}\" to \"${to.fullPath}\". It should be called exactly one time in each navigation guard. This will fail in production.`);\r\n        // @ts-ignore: we put it in the original one because it's easier to check\r\n        next._called = true;\r\n        if (called === 1)\r\n            next.apply(null, arguments);\r\n    };\r\n}\r\nfunction extractComponentsGuards(matched, guardType, to, from) {\r\n    const guards = [];\r\n    for (const record of matched) {\r\n        for (const name in record.components) {\r\n            let rawComponent = record.components[name];\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                if (!rawComponent ||\r\n                    (typeof rawComponent !== 'object' &&\r\n                        typeof rawComponent !== 'function')) {\r\n                    warn(`Component \"${name}\" in record with path \"${record.path}\" is not` +\r\n                        ` a valid component. Received \"${String(rawComponent)}\".`);\r\n                    // throw to ensure we stop here but warn to ensure the message isn't\r\n                    // missed by the user\r\n                    throw new Error('Invalid route component');\r\n                }\r\n                else if ('then' in rawComponent) {\r\n                    // warn if user wrote import('/component.vue') instead of () =>\r\n                    // import('./component.vue')\r\n                    warn(`Component \"${name}\" in record with path \"${record.path}\" is a ` +\r\n                        `Promise instead of a function that returns a Promise. Did you ` +\r\n                        `write \"import('./MyPage.vue')\" instead of ` +\r\n                        `\"() => import('./MyPage.vue')\" ? This will break in ` +\r\n                        `production if not fixed.`);\r\n                    let promise = rawComponent;\r\n                    rawComponent = () => promise;\r\n                }\r\n                else if (rawComponent.__asyncLoader &&\r\n                    // warn only once per component\r\n                    !rawComponent.__warnedDefineAsync) {\r\n                    rawComponent.__warnedDefineAsync = true;\r\n                    warn(`Component \"${name}\" in record with path \"${record.path}\" is defined ` +\r\n                        `using \"defineAsyncComponent()\". ` +\r\n                        `Write \"() => import('./MyPage.vue')\" instead of ` +\r\n                        `\"defineAsyncComponent(() => import('./MyPage.vue'))\".`);\r\n                }\r\n            }\r\n            // skip update and leave guards if the route component is not mounted\r\n            if (guardType !== 'beforeRouteEnter' && !record.instances[name])\r\n                continue;\r\n            if (isRouteComponent(rawComponent)) {\r\n                // __vccOpts is added by vue-class-component and contain the regular options\r\n                let options = rawComponent.__vccOpts || rawComponent;\r\n                const guard = options[guardType];\r\n                guard && guards.push(guardToPromiseFn(guard, to, from, record, name));\r\n            }\r\n            else {\r\n                // start requesting the chunk already\r\n                let componentPromise = rawComponent();\r\n                if ((process.env.NODE_ENV !== 'production') && !('catch' in componentPromise)) {\r\n                    warn(`Component \"${name}\" in record with path \"${record.path}\" is a function that does not return a Promise. If you were passing a functional component, make sure to add a \"displayName\" to the component. This will break in production if not fixed.`);\r\n                    componentPromise = Promise.resolve(componentPromise);\r\n                }\r\n                else {\r\n                    // display the error if any\r\n                    componentPromise = componentPromise.catch(console.error);\r\n                }\r\n                guards.push(() => componentPromise.then(resolved => {\r\n                    if (!resolved)\r\n                        return Promise.reject(new Error(`Couldn't resolve component \"${name}\" at \"${record.path}\"`));\r\n                    const resolvedComponent = isESModule(resolved)\r\n                        ? resolved.default\r\n                        : resolved;\r\n                    // replace the function with the resolved component\r\n                    record.components[name] = resolvedComponent;\r\n                    // __vccOpts is added by vue-class-component and contain the regular options\r\n                    let options = resolvedComponent.__vccOpts || resolvedComponent;\r\n                    const guard = options[guardType];\r\n                    return guard && guardToPromiseFn(guard, to, from, record, name)();\r\n                }));\r\n            }\r\n        }\r\n    }\r\n    return guards;\r\n}\r\n/**\r\n * Allows differentiating lazy components from functional components and vue-class-component\r\n * @param component\r\n */\r\nfunction isRouteComponent(component) {\r\n    return (typeof component === 'object' ||\r\n        'displayName' in component ||\r\n        'props' in component ||\r\n        '__vccOpts' in component);\r\n}\n\n// TODO: we could allow currentRoute as a prop to expose `isActive` and\r\n// `isExactActive` behavior should go through an RFC\r\nfunction useLink(props) {\r\n    const router = inject(routerKey);\r\n    const currentRoute = inject(routeLocationKey);\r\n    const route = computed(() => router.resolve(unref(props.to)));\r\n    const activeRecordIndex = computed(() => {\r\n        let { matched } = route.value;\r\n        let { length } = matched;\r\n        const routeMatched = matched[length - 1];\r\n        let currentMatched = currentRoute.matched;\r\n        if (!routeMatched || !currentMatched.length)\r\n            return -1;\r\n        let index = currentMatched.findIndex(isSameRouteRecord.bind(null, routeMatched));\r\n        if (index > -1)\r\n            return index;\r\n        // possible parent record\r\n        let parentRecordPath = getOriginalPath(matched[length - 2]);\r\n        return (\r\n        // we are dealing with nested routes\r\n        length > 1 &&\r\n            // if the parent and matched route have the same path, this link is\r\n            // referring to the empty child. Or we currently are on a different\r\n            // child of the same parent\r\n            getOriginalPath(routeMatched) === parentRecordPath &&\r\n            // avoid comparing the child with its parent\r\n            currentMatched[currentMatched.length - 1].path !== parentRecordPath\r\n            ? currentMatched.findIndex(isSameRouteRecord.bind(null, matched[length - 2]))\r\n            : index);\r\n    });\r\n    const isActive = computed(() => activeRecordIndex.value > -1 &&\r\n        includesParams(currentRoute.params, route.value.params));\r\n    const isExactActive = computed(() => activeRecordIndex.value > -1 &&\r\n        activeRecordIndex.value === currentRoute.matched.length - 1 &&\r\n        isSameRouteLocationParams(currentRoute.params, route.value.params));\r\n    function navigate(e = {}) {\r\n        if (guardEvent(e))\r\n            return router[unref(props.replace) ? 'replace' : 'push'](unref(props.to));\r\n        return Promise.resolve();\r\n    }\r\n    return {\r\n        route,\r\n        href: computed(() => route.value.href),\r\n        isActive,\r\n        isExactActive,\r\n        navigate,\r\n    };\r\n}\r\nconst RouterLinkImpl = /*#__PURE__*/ defineComponent({\r\n    name: 'RouterLink',\r\n    props: {\r\n        to: {\r\n            type: [String, Object],\r\n            required: true,\r\n        },\r\n        replace: Boolean,\r\n        activeClass: String,\r\n        // inactiveClass: String,\r\n        exactActiveClass: String,\r\n        custom: Boolean,\r\n        ariaCurrentValue: {\r\n            type: String,\r\n            default: 'page',\r\n        },\r\n    },\r\n    setup(props, { slots }) {\r\n        const link = reactive(useLink(props));\r\n        const { options } = inject(routerKey);\r\n        const elClass = computed(() => ({\r\n            [getLinkClass(props.activeClass, options.linkActiveClass, 'router-link-active')]: link.isActive,\r\n            // [getLinkClass(\r\n            //   props.inactiveClass,\r\n            //   options.linkInactiveClass,\r\n            //   'router-link-inactive'\r\n            // )]: !link.isExactActive,\r\n            [getLinkClass(props.exactActiveClass, options.linkExactActiveClass, 'router-link-exact-active')]: link.isExactActive,\r\n        }));\r\n        if (((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) && true) {\r\n            const instance = getCurrentInstance();\r\n            watchEffect(() => {\r\n                if (!instance)\r\n                    return;\r\n                instance.__vrl_route = link.route;\r\n            }, { flush: 'post' });\r\n            watchEffect(() => {\r\n                if (!instance)\r\n                    return;\r\n                instance.__vrl_active = link.isActive;\r\n                instance.__vrl_exactActive = link.isExactActive;\r\n            }, { flush: 'post' });\r\n        }\r\n        return () => {\r\n            const children = slots.default && slots.default(link);\r\n            return props.custom\r\n                ? children\r\n                : h('a', {\r\n                    'aria-current': link.isExactActive\r\n                        ? props.ariaCurrentValue\r\n                        : null,\r\n                    href: link.href,\r\n                    // this would override user added attrs but Vue will still add\r\n                    // the listener so we end up triggering both\r\n                    onClick: link.navigate,\r\n                    class: elClass.value,\r\n                }, children);\r\n        };\r\n    },\r\n});\r\n// export the public type for h/tsx inference\r\n// also to avoid inline import() in generated d.ts files\r\n/**\r\n * Component to render a link that triggers a navigation on click.\r\n */\r\nconst RouterLink = RouterLinkImpl;\r\nfunction guardEvent(e) {\r\n    // don't redirect with control keys\r\n    if (e.metaKey || e.altKey || e.ctrlKey || e.shiftKey)\r\n        return;\r\n    // don't redirect when preventDefault called\r\n    if (e.defaultPrevented)\r\n        return;\r\n    // don't redirect on right click\r\n    if (e.button !== undefined && e.button !== 0)\r\n        return;\r\n    // don't redirect if `target=\"_blank\"`\r\n    // @ts-ignore getAttribute does exist\r\n    if (e.currentTarget && e.currentTarget.getAttribute) {\r\n        // @ts-ignore getAttribute exists\r\n        const target = e.currentTarget.getAttribute('target');\r\n        if (/\\b_blank\\b/i.test(target))\r\n            return;\r\n    }\r\n    // this may be a Weex event which doesn't have this method\r\n    if (e.preventDefault)\r\n        e.preventDefault();\r\n    return true;\r\n}\r\nfunction includesParams(outer, inner) {\r\n    for (let key in inner) {\r\n        let innerValue = inner[key];\r\n        let outerValue = outer[key];\r\n        if (typeof innerValue === 'string') {\r\n            if (innerValue !== outerValue)\r\n                return false;\r\n        }\r\n        else {\r\n            if (!Array.isArray(outerValue) ||\r\n                outerValue.length !== innerValue.length ||\r\n                innerValue.some((value, i) => value !== outerValue[i]))\r\n                return false;\r\n        }\r\n    }\r\n    return true;\r\n}\r\n/**\r\n * Get the original path value of a record by following its aliasOf\r\n * @param record\r\n */\r\nfunction getOriginalPath(record) {\r\n    return record ? (record.aliasOf ? record.aliasOf.path : record.path) : '';\r\n}\r\n/**\r\n * Utility class to get the active class based on defaults.\r\n * @param propClass\r\n * @param globalClass\r\n * @param defaultClass\r\n */\r\nconst getLinkClass = (propClass, globalClass, defaultClass) => propClass != null\r\n    ? propClass\r\n    : globalClass != null\r\n        ? globalClass\r\n        : defaultClass;\n\nconst RouterViewImpl = /*#__PURE__*/ defineComponent({\r\n    name: 'RouterView',\r\n    // #674 we manually inherit them\r\n    inheritAttrs: false,\r\n    props: {\r\n        name: {\r\n            type: String,\r\n            default: 'default',\r\n        },\r\n        route: Object,\r\n    },\r\n    setup(props, { attrs, slots }) {\r\n        (process.env.NODE_ENV !== 'production') && warnDeprecatedUsage();\r\n        const injectedRoute = inject(routerViewLocationKey);\r\n        const routeToDisplay = computed(() => props.route || injectedRoute.value);\r\n        const depth = inject(viewDepthKey, 0);\r\n        const matchedRouteRef = computed(() => routeToDisplay.value.matched[depth]);\r\n        provide(viewDepthKey, depth + 1);\r\n        provide(matchedRouteKey, matchedRouteRef);\r\n        provide(routerViewLocationKey, routeToDisplay);\r\n        const viewRef = ref();\r\n        // watch at the same time the component instance, the route record we are\r\n        // rendering, and the name\r\n        watch(() => [viewRef.value, matchedRouteRef.value, props.name], ([instance, to, name], [oldInstance, from, oldName]) => {\r\n            // copy reused instances\r\n            if (to) {\r\n                // this will update the instance for new instances as well as reused\r\n                // instances when navigating to a new route\r\n                to.instances[name] = instance;\r\n                // the component instance is reused for a different route or name so\r\n                // we copy any saved update or leave guards. With async setup, the\r\n                // mounting component will mount before the matchedRoute changes,\r\n                // making instance === oldInstance, so we check if guards have been\r\n                // added before. This works because we remove guards when\r\n                // unmounting/deactivating components\r\n                if (from && from !== to && instance && instance === oldInstance) {\r\n                    if (!to.leaveGuards.size) {\r\n                        to.leaveGuards = from.leaveGuards;\r\n                    }\r\n                    if (!to.updateGuards.size) {\r\n                        to.updateGuards = from.updateGuards;\r\n                    }\r\n                }\r\n            }\r\n            // trigger beforeRouteEnter next callbacks\r\n            if (instance &&\r\n                to &&\r\n                // if there is no instance but to and from are the same this might be\r\n                // the first visit\r\n                (!from || !isSameRouteRecord(to, from) || !oldInstance)) {\r\n                (to.enterCallbacks[name] || []).forEach(callback => callback(instance));\r\n            }\r\n        }, { flush: 'post' });\r\n        return () => {\r\n            const route = routeToDisplay.value;\r\n            const matchedRoute = matchedRouteRef.value;\r\n            const ViewComponent = matchedRoute && matchedRoute.components[props.name];\r\n            // we need the value at the time we render because when we unmount, we\r\n            // navigated to a different location so the value is different\r\n            const currentName = props.name;\r\n            if (!ViewComponent) {\r\n                return normalizeSlot(slots.default, { Component: ViewComponent, route });\r\n            }\r\n            // props from route configuration\r\n            const routePropsOption = matchedRoute.props[props.name];\r\n            const routeProps = routePropsOption\r\n                ? routePropsOption === true\r\n                    ? route.params\r\n                    : typeof routePropsOption === 'function'\r\n                        ? routePropsOption(route)\r\n                        : routePropsOption\r\n                : null;\r\n            const onVnodeUnmounted = vnode => {\r\n                // remove the instance reference to prevent leak\r\n                if (vnode.component.isUnmounted) {\r\n                    matchedRoute.instances[currentName] = null;\r\n                }\r\n            };\r\n            const component = h(ViewComponent, assign({}, routeProps, attrs, {\r\n                onVnodeUnmounted,\r\n                ref: viewRef,\r\n            }));\r\n            return (\r\n            // pass the vnode to the slot as a prop.\r\n            // h and <component :is=\"...\"> both accept vnodes\r\n            normalizeSlot(slots.default, { Component: component, route }) ||\r\n                component);\r\n        };\r\n    },\r\n});\r\nfunction normalizeSlot(slot, data) {\r\n    if (!slot)\r\n        return null;\r\n    const slotContent = slot(data);\r\n    return slotContent.length === 1 ? slotContent[0] : slotContent;\r\n}\r\n// export the public type for h/tsx inference\r\n// also to avoid inline import() in generated d.ts files\r\n/**\r\n * Component to display the current route the user is at.\r\n */\r\nconst RouterView = RouterViewImpl;\r\n// warn against deprecated usage with <transition> & <keep-alive>\r\n// due to functional component being no longer eager in Vue 3\r\nfunction warnDeprecatedUsage() {\r\n    const instance = getCurrentInstance();\r\n    const parentName = instance.parent && instance.parent.type.name;\r\n    if (parentName &&\r\n        (parentName === 'KeepAlive' || parentName.includes('Transition'))) {\r\n        const comp = parentName === 'KeepAlive' ? 'keep-alive' : 'transition';\r\n        warn(`<router-view> can no longer be used directly inside <transition> or <keep-alive>.\\n` +\r\n            `Use slot props instead:\\n\\n` +\r\n            `<router-view v-slot=\"{ Component }\">\\n` +\r\n            `  <${comp}>\\n` +\r\n            `    <component :is=\"Component\" />\\n` +\r\n            `  </${comp}>\\n` +\r\n            `</router-view>`);\r\n    }\r\n}\n\nfunction getDevtoolsGlobalHook() {\n    return getTarget().__VUE_DEVTOOLS_GLOBAL_HOOK__;\n}\nfunction getTarget() {\n    // @ts-ignore\n    return typeof navigator !== 'undefined'\n        ? window\n        : typeof global !== 'undefined'\n            ? global\n            : {};\n}\n\nconst HOOK_SETUP = 'devtools-plugin:setup';\n\nfunction setupDevtoolsPlugin(pluginDescriptor, setupFn) {\n    const hook = getDevtoolsGlobalHook();\n    if (hook) {\n        hook.emit(HOOK_SETUP, pluginDescriptor, setupFn);\n    }\n    else {\n        const target = getTarget();\n        const list = target.__VUE_DEVTOOLS_PLUGINS__ = target.__VUE_DEVTOOLS_PLUGINS__ || [];\n        list.push({\n            pluginDescriptor,\n            setupFn\n        });\n    }\n}\n\nfunction formatRouteLocation(routeLocation, tooltip) {\r\n    const copy = assign({}, routeLocation, {\r\n        // remove variables that can contain vue instances\r\n        matched: routeLocation.matched.map(matched => omit(matched, ['instances', 'children', 'aliasOf'])),\r\n    });\r\n    return {\r\n        _custom: {\r\n            type: null,\r\n            readOnly: true,\r\n            display: routeLocation.fullPath,\r\n            tooltip,\r\n            value: copy,\r\n        },\r\n    };\r\n}\r\nfunction formatDisplay(display) {\r\n    return {\r\n        _custom: {\r\n            display,\r\n        },\r\n    };\r\n}\r\n// to support multiple router instances\r\nlet routerId = 0;\r\nfunction addDevtools(app, router, matcher) {\r\n    // Take over router.beforeEach and afterEach\r\n    // make sure we are not registering the devtool twice\r\n    if (router.__hasDevtools)\r\n        return;\r\n    router.__hasDevtools = true;\r\n    // increment to support multiple router instances\r\n    const id = routerId++;\r\n    setupDevtoolsPlugin({\r\n        id: 'org.vuejs.router' + (id ? '.' + id : ''),\r\n        label: 'Vue Router',\r\n        packageName: 'vue-router',\r\n        homepage: 'https://next.router.vuejs.org/',\r\n        logo: 'https://vuejs.org/images/icons/favicon-96x96.png',\r\n        componentStateTypes: ['Routing'],\r\n        app,\r\n    }, api => {\r\n        // display state added by the router\r\n        api.on.inspectComponent((payload, ctx) => {\r\n            if (payload.instanceData) {\r\n                payload.instanceData.state.push({\r\n                    type: 'Routing',\r\n                    key: '$route',\r\n                    editable: false,\r\n                    value: formatRouteLocation(router.currentRoute.value, 'Current Route'),\r\n                });\r\n            }\r\n        });\r\n        // mark router-link as active\r\n        api.on.visitComponentTree(({ treeNode: node, componentInstance }) => {\r\n            if (node.name === 'RouterLink') {\r\n                if (componentInstance.__vrl_route) {\r\n                    node.tags.push({\r\n                        label: componentInstance.__vrl_route.path,\r\n                        textColor: 0,\r\n                        backgroundColor: ORANGE_400,\r\n                    });\r\n                }\r\n                if (componentInstance.__vrl_exactActive) {\r\n                    node.tags.push({\r\n                        label: 'exact',\r\n                        textColor: 0,\r\n                        backgroundColor: LIME_500,\r\n                    });\r\n                }\r\n                if (componentInstance.__vrl_active) {\r\n                    node.tags.push({\r\n                        label: 'active',\r\n                        textColor: 0,\r\n                        backgroundColor: BLUE_600,\r\n                    });\r\n                }\r\n            }\r\n        });\r\n        watch(router.currentRoute, () => {\r\n            // refresh active state\r\n            refreshRoutesView();\r\n            api.notifyComponentUpdate();\r\n            api.sendInspectorTree(routerInspectorId);\r\n        });\r\n        const navigationsLayerId = 'router:navigations:' + id;\r\n        api.addTimelineLayer({\r\n            id: navigationsLayerId,\r\n            label: `Router${id ? ' ' + id : ''} Navigations`,\r\n            color: 0x40a8c4,\r\n        });\r\n        // const errorsLayerId = 'router:errors'\r\n        // api.addTimelineLayer({\r\n        //   id: errorsLayerId,\r\n        //   label: 'Router Errors',\r\n        //   color: 0xea5455,\r\n        // })\r\n        router.onError(error => {\r\n            api.addTimelineEvent({\r\n                layerId: navigationsLayerId,\r\n                event: {\r\n                    title: 'Error',\r\n                    subtitle: 'An uncaught error happened during navigation',\r\n                    logType: 'error',\r\n                    time: Date.now(),\r\n                    data: { error },\r\n                },\r\n            });\r\n        });\r\n        // attached to `meta` and used to group events\r\n        let navigationId = 0;\r\n        router.beforeEach((to, from) => {\r\n            const data = {\r\n                guard: formatDisplay('beforeEach'),\r\n                from: formatRouteLocation(from, 'Current Location during this navigation'),\r\n                to: formatRouteLocation(to, 'Target location'),\r\n            };\r\n            // Used to group navigations together, hide from devtools\r\n            Object.defineProperty(to.meta, '__navigationId', {\r\n                value: navigationId++,\r\n            });\r\n            api.addTimelineEvent({\r\n                layerId: navigationsLayerId,\r\n                event: {\r\n                    time: Date.now(),\r\n                    title: 'Start of navigation',\r\n                    data,\r\n                    groupId: to.meta.__navigationId,\r\n                },\r\n            });\r\n        });\r\n        router.afterEach((to, from, failure) => {\r\n            const data = {\r\n                guard: formatDisplay('afterEach'),\r\n            };\r\n            if (failure) {\r\n                data.failure = {\r\n                    _custom: {\r\n                        type: Error,\r\n                        readOnly: true,\r\n                        display: failure ? failure.message : '',\r\n                        tooltip: 'Navigation Failure',\r\n                        value: failure,\r\n                    },\r\n                };\r\n                data.status = formatDisplay('❌');\r\n            }\r\n            else {\r\n                data.status = formatDisplay('✅');\r\n            }\r\n            // we set here to have the right order\r\n            data.from = formatRouteLocation(from, 'Current Location during this navigation');\r\n            data.to = formatRouteLocation(to, 'Target location');\r\n            api.addTimelineEvent({\r\n                layerId: navigationsLayerId,\r\n                event: {\r\n                    title: 'End of navigation',\r\n                    time: Date.now(),\r\n                    data,\r\n                    logType: failure ? 'warning' : 'default',\r\n                    groupId: to.meta.__navigationId,\r\n                },\r\n            });\r\n        });\r\n        /**\r\n         * Inspector of Existing routes\r\n         */\r\n        const routerInspectorId = 'router-inspector:' + id;\r\n        api.addInspector({\r\n            id: routerInspectorId,\r\n            label: 'Routes' + (id ? ' ' + id : ''),\r\n            icon: 'book',\r\n            treeFilterPlaceholder: 'Search routes',\r\n        });\r\n        function refreshRoutesView() {\r\n            // the routes view isn't active\r\n            if (!activeRoutesPayload)\r\n                return;\r\n            const payload = activeRoutesPayload;\r\n            // children routes will appear as nested\r\n            let routes = matcher.getRoutes().filter(route => !route.parent);\r\n            // reset match state to false\r\n            routes.forEach(resetMatchStateOnRouteRecord);\r\n            // apply a match state if there is a payload\r\n            if (payload.filter) {\r\n                routes = routes.filter(route => \r\n                // save matches state based on the payload\r\n                isRouteMatching(route, payload.filter.toLowerCase()));\r\n            }\r\n            // mark active routes\r\n            routes.forEach(route => markRouteRecordActive(route, router.currentRoute.value));\r\n            payload.rootNodes = routes.map(formatRouteRecordForInspector);\r\n        }\r\n        let activeRoutesPayload;\r\n        api.on.getInspectorTree(payload => {\r\n            activeRoutesPayload = payload;\r\n            if (payload.app === app && payload.inspectorId === routerInspectorId) {\r\n                refreshRoutesView();\r\n            }\r\n        });\r\n        /**\r\n         * Display information about the currently selected route record\r\n         */\r\n        api.on.getInspectorState(payload => {\r\n            if (payload.app === app && payload.inspectorId === routerInspectorId) {\r\n                const routes = matcher.getRoutes();\r\n                const route = routes.find(route => route.record.__vd_id === payload.nodeId);\r\n                if (route) {\r\n                    payload.state = {\r\n                        options: formatRouteRecordMatcherForStateInspector(route),\r\n                    };\r\n                }\r\n            }\r\n        });\r\n        api.sendInspectorTree(routerInspectorId);\r\n        api.sendInspectorState(routerInspectorId);\r\n    });\r\n}\r\nfunction modifierForKey(key) {\r\n    if (key.optional) {\r\n        return key.repeatable ? '*' : '?';\r\n    }\r\n    else {\r\n        return key.repeatable ? '+' : '';\r\n    }\r\n}\r\nfunction formatRouteRecordMatcherForStateInspector(route) {\r\n    const { record } = route;\r\n    const fields = [\r\n        { editable: false, key: 'path', value: record.path },\r\n    ];\r\n    if (record.name != null) {\r\n        fields.push({\r\n            editable: false,\r\n            key: 'name',\r\n            value: record.name,\r\n        });\r\n    }\r\n    fields.push({ editable: false, key: 'regexp', value: route.re });\r\n    if (route.keys.length) {\r\n        fields.push({\r\n            editable: false,\r\n            key: 'keys',\r\n            value: {\r\n                _custom: {\r\n                    type: null,\r\n                    readOnly: true,\r\n                    display: route.keys\r\n                        .map(key => `${key.name}${modifierForKey(key)}`)\r\n                        .join(' '),\r\n                    tooltip: 'Param keys',\r\n                    value: route.keys,\r\n                },\r\n            },\r\n        });\r\n    }\r\n    if (record.redirect != null) {\r\n        fields.push({\r\n            editable: false,\r\n            key: 'redirect',\r\n            value: record.redirect,\r\n        });\r\n    }\r\n    if (route.alias.length) {\r\n        fields.push({\r\n            editable: false,\r\n            key: 'aliases',\r\n            value: route.alias.map(alias => alias.record.path),\r\n        });\r\n    }\r\n    fields.push({\r\n        key: 'score',\r\n        editable: false,\r\n        value: {\r\n            _custom: {\r\n                type: null,\r\n                readOnly: true,\r\n                display: route.score.map(score => score.join(', ')).join(' | '),\r\n                tooltip: 'Score used to sort routes',\r\n                value: route.score,\r\n            },\r\n        },\r\n    });\r\n    return fields;\r\n}\r\n/**\r\n * Extracted from tailwind palette\r\n */\r\nconst PINK_500 = 0xec4899;\r\nconst BLUE_600 = 0x2563eb;\r\nconst LIME_500 = 0x84cc16;\r\nconst CYAN_400 = 0x22d3ee;\r\nconst ORANGE_400 = 0xfb923c;\r\n// const GRAY_100 = 0xf4f4f5\r\nconst DARK = 0x666666;\r\nfunction formatRouteRecordForInspector(route) {\r\n    const tags = [];\r\n    const { record } = route;\r\n    if (record.name != null) {\r\n        tags.push({\r\n            label: String(record.name),\r\n            textColor: 0,\r\n            backgroundColor: CYAN_400,\r\n        });\r\n    }\r\n    if (record.aliasOf) {\r\n        tags.push({\r\n            label: 'alias',\r\n            textColor: 0,\r\n            backgroundColor: ORANGE_400,\r\n        });\r\n    }\r\n    if (route.__vd_match) {\r\n        tags.push({\r\n            label: 'matches',\r\n            textColor: 0,\r\n            backgroundColor: PINK_500,\r\n        });\r\n    }\r\n    if (route.__vd_exactActive) {\r\n        tags.push({\r\n            label: 'exact',\r\n            textColor: 0,\r\n            backgroundColor: LIME_500,\r\n        });\r\n    }\r\n    if (route.__vd_active) {\r\n        tags.push({\r\n            label: 'active',\r\n            textColor: 0,\r\n            backgroundColor: BLUE_600,\r\n        });\r\n    }\r\n    if (record.redirect) {\r\n        tags.push({\r\n            label: 'redirect: ' +\r\n                (typeof record.redirect === 'string' ? record.redirect : 'Object'),\r\n            textColor: 0xffffff,\r\n            backgroundColor: DARK,\r\n        });\r\n    }\r\n    // add an id to be able to select it. Using the `path` is not possible because\r\n    // empty path children would collide with their parents\r\n    let id = String(routeRecordId++);\r\n    record.__vd_id = id;\r\n    return {\r\n        id,\r\n        label: record.path,\r\n        tags,\r\n        children: route.children.map(formatRouteRecordForInspector),\r\n    };\r\n}\r\n//  incremental id for route records and inspector state\r\nlet routeRecordId = 0;\r\nconst EXTRACT_REGEXP_RE = /^\\/(.*)\\/([a-z]*)$/;\r\nfunction markRouteRecordActive(route, currentRoute) {\r\n    // no route will be active if matched is empty\r\n    // reset the matching state\r\n    const isExactActive = currentRoute.matched.length &&\r\n        isSameRouteRecord(currentRoute.matched[currentRoute.matched.length - 1], route.record);\r\n    route.__vd_exactActive = route.__vd_active = isExactActive;\r\n    if (!isExactActive) {\r\n        route.__vd_active = currentRoute.matched.some(match => isSameRouteRecord(match, route.record));\r\n    }\r\n    route.children.forEach(childRoute => markRouteRecordActive(childRoute, currentRoute));\r\n}\r\nfunction resetMatchStateOnRouteRecord(route) {\r\n    route.__vd_match = false;\r\n    route.children.forEach(resetMatchStateOnRouteRecord);\r\n}\r\nfunction isRouteMatching(route, filter) {\r\n    const found = String(route.re).match(EXTRACT_REGEXP_RE);\r\n    route.__vd_match = false;\r\n    if (!found || found.length < 3) {\r\n        return false;\r\n    }\r\n    // use a regexp without $ at the end to match nested routes better\r\n    const nonEndingRE = new RegExp(found[1].replace(/\\$$/, ''), found[2]);\r\n    if (nonEndingRE.test(filter)) {\r\n        // mark children as matches\r\n        route.children.forEach(child => isRouteMatching(child, filter));\r\n        // exception case: `/`\r\n        if (route.record.path !== '/' || filter === '/') {\r\n            route.__vd_match = route.re.test(filter);\r\n            return true;\r\n        }\r\n        // hide the / route\r\n        return false;\r\n    }\r\n    const path = route.record.path.toLowerCase();\r\n    const decodedPath = decode(path);\r\n    // also allow partial matching on the path\r\n    if (!filter.startsWith('/') &&\r\n        (decodedPath.includes(filter) || path.includes(filter)))\r\n        return true;\r\n    if (decodedPath.startsWith(filter) || path.startsWith(filter))\r\n        return true;\r\n    if (route.record.name && String(route.record.name).includes(filter))\r\n        return true;\r\n    return route.children.some(child => isRouteMatching(child, filter));\r\n}\r\nfunction omit(obj, keys) {\r\n    const ret = {};\r\n    for (let key in obj) {\r\n        if (!keys.includes(key)) {\r\n            // @ts-ignore\r\n            ret[key] = obj[key];\r\n        }\r\n    }\r\n    return ret;\r\n}\n\n/**\r\n * Creates a Router instance that can be used by a Vue app.\r\n *\r\n * @param options - {@link RouterOptions}\r\n */\r\nfunction createRouter(options) {\r\n    const matcher = createRouterMatcher(options.routes, options);\r\n    let parseQuery$1 = options.parseQuery || parseQuery;\r\n    let stringifyQuery$1 = options.stringifyQuery || stringifyQuery;\r\n    let routerHistory = options.history;\r\n    if ((process.env.NODE_ENV !== 'production') && !routerHistory)\r\n        throw new Error('Provide the \"history\" option when calling \"createRouter()\":' +\r\n            ' https://next.router.vuejs.org/api/#history.');\r\n    const beforeGuards = useCallbacks();\r\n    const beforeResolveGuards = useCallbacks();\r\n    const afterGuards = useCallbacks();\r\n    const currentRoute = shallowRef(START_LOCATION_NORMALIZED);\r\n    let pendingLocation = START_LOCATION_NORMALIZED;\r\n    // leave the scrollRestoration if no scrollBehavior is provided\r\n    if (isBrowser && options.scrollBehavior && 'scrollRestoration' in history) {\r\n        history.scrollRestoration = 'manual';\r\n    }\r\n    const normalizeParams = applyToParams.bind(null, paramValue => '' + paramValue);\r\n    const encodeParams = applyToParams.bind(null, encodeParam);\r\n    const decodeParams = applyToParams.bind(null, decode);\r\n    function addRoute(parentOrRoute, route) {\r\n        let parent;\r\n        let record;\r\n        if (isRouteName(parentOrRoute)) {\r\n            parent = matcher.getRecordMatcher(parentOrRoute);\r\n            record = route;\r\n        }\r\n        else {\r\n            record = parentOrRoute;\r\n        }\r\n        return matcher.addRoute(record, parent);\r\n    }\r\n    function removeRoute(name) {\r\n        let recordMatcher = matcher.getRecordMatcher(name);\r\n        if (recordMatcher) {\r\n            matcher.removeRoute(recordMatcher);\r\n        }\r\n        else if ((process.env.NODE_ENV !== 'production')) {\r\n            warn(`Cannot remove non-existent route \"${String(name)}\"`);\r\n        }\r\n    }\r\n    function getRoutes() {\r\n        return matcher.getRoutes().map(routeMatcher => routeMatcher.record);\r\n    }\r\n    function hasRoute(name) {\r\n        return !!matcher.getRecordMatcher(name);\r\n    }\r\n    function resolve(rawLocation, currentLocation) {\r\n        // const objectLocation = routerLocationAsObject(rawLocation)\r\n        // we create a copy to modify it later\r\n        currentLocation = assign({}, currentLocation || currentRoute.value);\r\n        if (typeof rawLocation === 'string') {\r\n            let locationNormalized = parseURL(parseQuery$1, rawLocation, currentLocation.path);\r\n            let matchedRoute = matcher.resolve({ path: locationNormalized.path }, currentLocation);\r\n            let href = routerHistory.createHref(locationNormalized.fullPath);\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                if (href.startsWith('//'))\r\n                    warn(`Location \"${rawLocation}\" resolved to \"${href}\". A resolved location cannot start with multiple slashes.`);\r\n                else if (!matchedRoute.matched.length) {\r\n                    warn(`No match found for location with path \"${rawLocation}\"`);\r\n                }\r\n            }\r\n            // locationNormalized is always a new object\r\n            return assign(locationNormalized, matchedRoute, {\r\n                params: decodeParams(matchedRoute.params),\r\n                hash: decode(locationNormalized.hash),\r\n                redirectedFrom: undefined,\r\n                href,\r\n            });\r\n        }\r\n        let matcherLocation;\r\n        // path could be relative in object as well\r\n        if ('path' in rawLocation) {\r\n            if ((process.env.NODE_ENV !== 'production') &&\r\n                'params' in rawLocation &&\r\n                !('name' in rawLocation) &&\r\n                Object.keys(rawLocation.params).length) {\r\n                warn(`Path \"${rawLocation.path}\" was passed with params but they will be ignored. Use a named route alongside params instead.`);\r\n            }\r\n            matcherLocation = assign({}, rawLocation, {\r\n                path: parseURL(parseQuery$1, rawLocation.path, currentLocation.path).path,\r\n            });\r\n        }\r\n        else {\r\n            // pass encoded values to the matcher so it can produce encoded path and fullPath\r\n            matcherLocation = assign({}, rawLocation, {\r\n                params: encodeParams(rawLocation.params),\r\n            });\r\n            // current location params are decoded, we need to encode them in case the\r\n            // matcher merges the params\r\n            currentLocation.params = encodeParams(currentLocation.params);\r\n        }\r\n        let matchedRoute = matcher.resolve(matcherLocation, currentLocation);\r\n        const hash = rawLocation.hash || '';\r\n        if ((process.env.NODE_ENV !== 'production') && hash && !hash.startsWith('#')) {\r\n            warn(`A \\`hash\\` should always start with the character \"#\". Replace \"${hash}\" with \"#${hash}\".`);\r\n        }\r\n        // decoding them) the matcher might have merged current location params so\r\n        // we need to run the decoding again\r\n        matchedRoute.params = normalizeParams(decodeParams(matchedRoute.params));\r\n        const fullPath = stringifyURL(stringifyQuery$1, assign({}, rawLocation, {\r\n            hash: encodeHash(hash),\r\n            path: matchedRoute.path,\r\n        }));\r\n        let href = routerHistory.createHref(fullPath);\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            if (href.startsWith('//')) {\r\n                warn(`Location \"${rawLocation}\" resolved to \"${href}\". A resolved location cannot start with multiple slashes.`);\r\n            }\r\n            else if (!matchedRoute.matched.length) {\r\n                warn(`No match found for location with path \"${'path' in rawLocation ? rawLocation.path : rawLocation}\"`);\r\n            }\r\n        }\r\n        return assign({\r\n            fullPath,\r\n            // keep the hash encoded so fullPath is effectively path + encodedQuery +\r\n            // hash\r\n            hash,\r\n            query: \r\n            // if the user is using a custom query lib like qs, we might have\r\n            // nested objects, so we keep the query as is, meaning it can contain\r\n            // numbers at `$route.query`, but at the point, the user will have to\r\n            // use their own type anyway.\r\n            // https://github.com/vuejs/vue-router-next/issues/328#issuecomment-649481567\r\n            stringifyQuery$1 === stringifyQuery\r\n                ? normalizeQuery(rawLocation.query)\r\n                : rawLocation.query,\r\n        }, matchedRoute, {\r\n            redirectedFrom: undefined,\r\n            href,\r\n        });\r\n    }\r\n    function locationAsObject(to) {\r\n        return typeof to === 'string'\r\n            ? parseURL(parseQuery$1, to, currentRoute.value.path)\r\n            : assign({}, to);\r\n    }\r\n    function checkCanceledNavigation(to, from) {\r\n        if (pendingLocation !== to) {\r\n            return createRouterError(8 /* NAVIGATION_CANCELLED */, {\r\n                from,\r\n                to,\r\n            });\r\n        }\r\n    }\r\n    function push(to) {\r\n        return pushWithRedirect(to);\r\n    }\r\n    function replace(to) {\r\n        return push(assign(locationAsObject(to), { replace: true }));\r\n    }\r\n    function handleRedirectRecord(to) {\r\n        const lastMatched = to.matched[to.matched.length - 1];\r\n        if (lastMatched && lastMatched.redirect) {\r\n            const { redirect } = lastMatched;\r\n            let newTargetLocation = typeof redirect === 'function' ? redirect(to) : redirect;\r\n            if (typeof newTargetLocation === 'string') {\r\n                newTargetLocation =\r\n                    newTargetLocation.indexOf('?') > -1 ||\r\n                        newTargetLocation.indexOf('#') > -1\r\n                        ? (newTargetLocation = locationAsObject(newTargetLocation))\r\n                        : { path: newTargetLocation };\r\n            }\r\n            if ((process.env.NODE_ENV !== 'production') &&\r\n                !('path' in newTargetLocation) &&\r\n                !('name' in newTargetLocation)) {\r\n                warn(`Invalid redirect found:\\n${JSON.stringify(newTargetLocation, null, 2)}\\n when navigating to \"${to.fullPath}\". A redirect must contain a name or path. This will break in production.`);\r\n                throw new Error('Invalid redirect');\r\n            }\r\n            return assign({\r\n                query: to.query,\r\n                hash: to.hash,\r\n                params: to.params,\r\n            }, newTargetLocation);\r\n        }\r\n    }\r\n    function pushWithRedirect(to, redirectedFrom) {\r\n        const targetLocation = (pendingLocation = resolve(to));\r\n        const from = currentRoute.value;\r\n        const data = to.state;\r\n        const force = to.force;\r\n        // to could be a string where `replace` is a function\r\n        const replace = to.replace === true;\r\n        const shouldRedirect = handleRedirectRecord(targetLocation);\r\n        if (shouldRedirect)\r\n            return pushWithRedirect(assign(locationAsObject(shouldRedirect), {\r\n                state: data,\r\n                force,\r\n                replace,\r\n            }), \r\n            // keep original redirectedFrom if it exists\r\n            redirectedFrom || targetLocation);\r\n        // if it was a redirect we already called `pushWithRedirect` above\r\n        const toLocation = targetLocation;\r\n        toLocation.redirectedFrom = redirectedFrom;\r\n        let failure;\r\n        if (!force && isSameRouteLocation(stringifyQuery$1, from, targetLocation)) {\r\n            failure = createRouterError(16 /* NAVIGATION_DUPLICATED */, { to: toLocation, from });\r\n            // trigger scroll to allow scrolling to the same anchor\r\n            handleScroll(from, from, \r\n            // this is a push, the only way for it to be triggered from a\r\n            // history.listen is with a redirect, which makes it become a push\r\n            true, \r\n            // This cannot be the first navigation because the initial location\r\n            // cannot be manually navigated to\r\n            false);\r\n        }\r\n        return (failure ? Promise.resolve(failure) : navigate(toLocation, from))\r\n            .catch((error) => isNavigationFailure(error)\r\n            ? error\r\n            : // reject any unknown error\r\n                triggerError(error))\r\n            .then((failure) => {\r\n            if (failure) {\r\n                if (isNavigationFailure(failure, 2 /* NAVIGATION_GUARD_REDIRECT */)) {\r\n                    if ((process.env.NODE_ENV !== 'production') &&\r\n                        // we are redirecting to the same location we were already at\r\n                        isSameRouteLocation(stringifyQuery$1, resolve(failure.to), toLocation) &&\r\n                        // and we have done it a couple of times\r\n                        redirectedFrom &&\r\n                        // @ts-ignore\r\n                        (redirectedFrom._count = redirectedFrom._count\r\n                            ? // @ts-ignore\r\n                                redirectedFrom._count + 1\r\n                            : 1) > 10) {\r\n                        warn(`Detected an infinite redirection in a navigation guard when going from \"${from.fullPath}\" to \"${toLocation.fullPath}\". Aborting to avoid a Stack Overflow. This will break in production if not fixed.`);\r\n                        return Promise.reject(new Error('Infinite redirect in navigation guard'));\r\n                    }\r\n                    return pushWithRedirect(\r\n                    // keep options\r\n                    assign(locationAsObject(failure.to), {\r\n                        state: data,\r\n                        force,\r\n                        replace,\r\n                    }), \r\n                    // preserve the original redirectedFrom if any\r\n                    redirectedFrom || toLocation);\r\n                }\r\n            }\r\n            else {\r\n                // if we fail we don't finalize the navigation\r\n                failure = finalizeNavigation(toLocation, from, true, replace, data);\r\n            }\r\n            triggerAfterEach(toLocation, from, failure);\r\n            return failure;\r\n        });\r\n    }\r\n    /**\r\n     * Helper to reject and skip all navigation guards if a new navigation happened\r\n     * @param to\r\n     * @param from\r\n     */\r\n    function checkCanceledNavigationAndReject(to, from) {\r\n        const error = checkCanceledNavigation(to, from);\r\n        return error ? Promise.reject(error) : Promise.resolve();\r\n    }\r\n    // TODO: refactor the whole before guards by internally using router.beforeEach\r\n    function navigate(to, from) {\r\n        let guards;\r\n        const [leavingRecords, updatingRecords, enteringRecords,] = extractChangingRecords(to, from);\r\n        // all components here have been resolved once because we are leaving\r\n        guards = extractComponentsGuards(leavingRecords.reverse(), 'beforeRouteLeave', to, from);\r\n        // leavingRecords is already reversed\r\n        for (const record of leavingRecords) {\r\n            record.leaveGuards.forEach(guard => {\r\n                guards.push(guardToPromiseFn(guard, to, from));\r\n            });\r\n        }\r\n        const canceledNavigationCheck = checkCanceledNavigationAndReject.bind(null, to, from);\r\n        guards.push(canceledNavigationCheck);\r\n        // run the queue of per route beforeRouteLeave guards\r\n        return (runGuardQueue(guards)\r\n            .then(() => {\r\n            // check global guards beforeEach\r\n            guards = [];\r\n            for (const guard of beforeGuards.list()) {\r\n                guards.push(guardToPromiseFn(guard, to, from));\r\n            }\r\n            guards.push(canceledNavigationCheck);\r\n            return runGuardQueue(guards);\r\n        })\r\n            .then(() => {\r\n            // check in components beforeRouteUpdate\r\n            guards = extractComponentsGuards(updatingRecords, 'beforeRouteUpdate', to, from);\r\n            for (const record of updatingRecords) {\r\n                record.updateGuards.forEach(guard => {\r\n                    guards.push(guardToPromiseFn(guard, to, from));\r\n                });\r\n            }\r\n            guards.push(canceledNavigationCheck);\r\n            // run the queue of per route beforeEnter guards\r\n            return runGuardQueue(guards);\r\n        })\r\n            .then(() => {\r\n            // check the route beforeEnter\r\n            guards = [];\r\n            for (const record of to.matched) {\r\n                // do not trigger beforeEnter on reused views\r\n                if (record.beforeEnter && from.matched.indexOf(record) < 0) {\r\n                    if (Array.isArray(record.beforeEnter)) {\r\n                        for (const beforeEnter of record.beforeEnter)\r\n                            guards.push(guardToPromiseFn(beforeEnter, to, from));\r\n                    }\r\n                    else {\r\n                        guards.push(guardToPromiseFn(record.beforeEnter, to, from));\r\n                    }\r\n                }\r\n            }\r\n            guards.push(canceledNavigationCheck);\r\n            // run the queue of per route beforeEnter guards\r\n            return runGuardQueue(guards);\r\n        })\r\n            .then(() => {\r\n            // NOTE: at this point to.matched is normalized and does not contain any () => Promise<Component>\r\n            // clear existing enterCallbacks, these are added by extractComponentsGuards\r\n            to.matched.forEach(record => (record.enterCallbacks = {}));\r\n            // check in-component beforeRouteEnter\r\n            guards = extractComponentsGuards(enteringRecords, 'beforeRouteEnter', to, from);\r\n            guards.push(canceledNavigationCheck);\r\n            // run the queue of per route beforeEnter guards\r\n            return runGuardQueue(guards);\r\n        })\r\n            .then(() => {\r\n            // check global guards beforeResolve\r\n            guards = [];\r\n            for (const guard of beforeResolveGuards.list()) {\r\n                guards.push(guardToPromiseFn(guard, to, from));\r\n            }\r\n            guards.push(canceledNavigationCheck);\r\n            return runGuardQueue(guards);\r\n        })\r\n            // catch any navigation canceled\r\n            .catch(err => isNavigationFailure(err, 8 /* NAVIGATION_CANCELLED */)\r\n            ? err\r\n            : Promise.reject(err)));\r\n    }\r\n    function triggerAfterEach(to, from, failure) {\r\n        // navigation is confirmed, call afterGuards\r\n        // TODO: wrap with error handlers\r\n        for (const guard of afterGuards.list())\r\n            guard(to, from, failure);\r\n    }\r\n    /**\r\n     * - Cleans up any navigation guards\r\n     * - Changes the url if necessary\r\n     * - Calls the scrollBehavior\r\n     */\r\n    function finalizeNavigation(toLocation, from, isPush, replace, data) {\r\n        // a more recent navigation took place\r\n        const error = checkCanceledNavigation(toLocation, from);\r\n        if (error)\r\n            return error;\r\n        // only consider as push if it's not the first navigation\r\n        const isFirstNavigation = from === START_LOCATION_NORMALIZED;\r\n        const state = !isBrowser ? {} : history.state;\r\n        // change URL only if the user did a push/replace and if it's not the initial navigation because\r\n        // it's just reflecting the url\r\n        if (isPush) {\r\n            // on the initial navigation, we want to reuse the scroll position from\r\n            // history state if it exists\r\n            if (replace || isFirstNavigation)\r\n                routerHistory.replace(toLocation.fullPath, assign({\r\n                    scroll: isFirstNavigation && state && state.scroll,\r\n                }, data));\r\n            else\r\n                routerHistory.push(toLocation.fullPath, data);\r\n        }\r\n        // accept current navigation\r\n        currentRoute.value = toLocation;\r\n        handleScroll(toLocation, from, isPush, isFirstNavigation);\r\n        markAsReady();\r\n    }\r\n    let removeHistoryListener;\r\n    // attach listener to history to trigger navigations\r\n    function setupListeners() {\r\n        removeHistoryListener = routerHistory.listen((to, _from, info) => {\r\n            // cannot be a redirect route because it was in history\r\n            let toLocation = resolve(to);\r\n            // due to dynamic routing, and to hash history with manual navigation\r\n            // (manually changing the url or calling history.hash = '#/somewhere'),\r\n            // there could be a redirect record in history\r\n            const shouldRedirect = handleRedirectRecord(toLocation);\r\n            if (shouldRedirect) {\r\n                pushWithRedirect(assign(shouldRedirect, { replace: true }), toLocation).catch(noop);\r\n                return;\r\n            }\r\n            pendingLocation = toLocation;\r\n            const from = currentRoute.value;\r\n            // TODO: should be moved to web history?\r\n            if (isBrowser) {\r\n                saveScrollPosition(getScrollKey(from.fullPath, info.delta), computeScrollPosition());\r\n            }\r\n            navigate(toLocation, from)\r\n                .catch((error) => {\r\n                if (isNavigationFailure(error, 4 /* NAVIGATION_ABORTED */ | 8 /* NAVIGATION_CANCELLED */)) {\r\n                    return error;\r\n                }\r\n                if (isNavigationFailure(error, 2 /* NAVIGATION_GUARD_REDIRECT */)) {\r\n                    // Here we could call if (info.delta) routerHistory.go(-info.delta,\r\n                    // false) but this is bug prone as we have no way to wait the\r\n                    // navigation to be finished before calling pushWithRedirect. Using\r\n                    // a setTimeout of 16ms seems to work but there is not guarantee for\r\n                    // it to work on every browser. So Instead we do not restore the\r\n                    // history entry and trigger a new navigation as requested by the\r\n                    // navigation guard.\r\n                    // the error is already handled by router.push we just want to avoid\r\n                    // logging the error\r\n                    pushWithRedirect(error.to, toLocation\r\n                    // avoid an uncaught rejection, let push call triggerError\r\n                    ).catch(noop);\r\n                    // avoid the then branch\r\n                    return Promise.reject();\r\n                }\r\n                // do not restore history on unknown direction\r\n                if (info.delta)\r\n                    routerHistory.go(-info.delta, false);\r\n                // unrecognized error, transfer to the global handler\r\n                return triggerError(error);\r\n            })\r\n                .then((failure) => {\r\n                failure =\r\n                    failure ||\r\n                        finalizeNavigation(\r\n                        // after navigation, all matched components are resolved\r\n                        toLocation, from, false);\r\n                // revert the navigation\r\n                if (failure && info.delta)\r\n                    routerHistory.go(-info.delta, false);\r\n                triggerAfterEach(toLocation, from, failure);\r\n            })\r\n                .catch(noop);\r\n        });\r\n    }\r\n    // Initialization and Errors\r\n    let readyHandlers = useCallbacks();\r\n    let errorHandlers = useCallbacks();\r\n    let ready;\r\n    /**\r\n     * Trigger errorHandlers added via onError and throws the error as well\r\n     * @param error - error to throw\r\n     * @returns the error as a rejected promise\r\n     */\r\n    function triggerError(error) {\r\n        markAsReady(error);\r\n        errorHandlers.list().forEach(handler => handler(error));\r\n        return Promise.reject(error);\r\n    }\r\n    function isReady() {\r\n        if (ready && currentRoute.value !== START_LOCATION_NORMALIZED)\r\n            return Promise.resolve();\r\n        return new Promise((resolve, reject) => {\r\n            readyHandlers.add([resolve, reject]);\r\n        });\r\n    }\r\n    /**\r\n     * Mark the router as ready, resolving the promised returned by isReady(). Can\r\n     * only be called once, otherwise does nothing.\r\n     * @param err - optional error\r\n     */\r\n    function markAsReady(err) {\r\n        if (ready)\r\n            return;\r\n        ready = true;\r\n        setupListeners();\r\n        readyHandlers\r\n            .list()\r\n            .forEach(([resolve, reject]) => (err ? reject(err) : resolve()));\r\n        readyHandlers.reset();\r\n    }\r\n    // Scroll behavior\r\n    function handleScroll(to, from, isPush, isFirstNavigation) {\r\n        const { scrollBehavior } = options;\r\n        if (!isBrowser || !scrollBehavior)\r\n            return Promise.resolve();\r\n        let scrollPosition = (!isPush && getSavedScrollPosition(getScrollKey(to.fullPath, 0))) ||\r\n            ((isFirstNavigation || !isPush) &&\r\n                history.state &&\r\n                history.state.scroll) ||\r\n            null;\r\n        return nextTick()\r\n            .then(() => scrollBehavior(to, from, scrollPosition))\r\n            .then(position => position && scrollToPosition(position))\r\n            .catch(triggerError);\r\n    }\r\n    const go = (delta) => routerHistory.go(delta);\r\n    let started;\r\n    const installedApps = new Set();\r\n    const router = {\r\n        currentRoute,\r\n        addRoute,\r\n        removeRoute,\r\n        hasRoute,\r\n        getRoutes,\r\n        resolve,\r\n        options,\r\n        push,\r\n        replace,\r\n        go,\r\n        back: () => go(-1),\r\n        forward: () => go(1),\r\n        beforeEach: beforeGuards.add,\r\n        beforeResolve: beforeResolveGuards.add,\r\n        afterEach: afterGuards.add,\r\n        onError: errorHandlers.add,\r\n        isReady,\r\n        install(app) {\r\n            const router = this;\r\n            app.component('RouterLink', RouterLink);\r\n            app.component('RouterView', RouterView);\r\n            app.config.globalProperties.$router = router;\r\n            Object.defineProperty(app.config.globalProperties, '$route', {\r\n                get: () => unref(currentRoute),\r\n            });\r\n            // this initial navigation is only necessary on client, on server it doesn't\r\n            // make sense because it will create an extra unnecessary navigation and could\r\n            // lead to problems\r\n            if (isBrowser &&\r\n                // used for the initial navigation client side to avoid pushing\r\n                // multiple times when the router is used in multiple apps\r\n                !started &&\r\n                currentRoute.value === START_LOCATION_NORMALIZED) {\r\n                // see above\r\n                started = true;\r\n                push(routerHistory.location).catch(err => {\r\n                    if ((process.env.NODE_ENV !== 'production'))\r\n                        warn('Unexpected error when starting the router:', err);\r\n                });\r\n            }\r\n            const reactiveRoute = {};\r\n            for (let key in START_LOCATION_NORMALIZED) {\r\n                // @ts-ignore: the key matches\r\n                reactiveRoute[key] = computed(() => currentRoute.value[key]);\r\n            }\r\n            app.provide(routerKey, router);\r\n            app.provide(routeLocationKey, reactive(reactiveRoute));\r\n            app.provide(routerViewLocationKey, currentRoute);\r\n            let unmountApp = app.unmount;\r\n            installedApps.add(app);\r\n            app.unmount = function () {\r\n                installedApps.delete(app);\r\n                if (installedApps.size < 1) {\r\n                    removeHistoryListener();\r\n                    currentRoute.value = START_LOCATION_NORMALIZED;\r\n                    started = false;\r\n                    ready = false;\r\n                }\r\n                unmountApp();\r\n            };\r\n            if (((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) && true) {\r\n                addDevtools(app, router, matcher);\r\n            }\r\n        },\r\n    };\r\n    return router;\r\n}\r\nfunction runGuardQueue(guards) {\r\n    return guards.reduce((promise, guard) => promise.then(() => guard()), Promise.resolve());\r\n}\r\nfunction extractChangingRecords(to, from) {\r\n    const leavingRecords = [];\r\n    const updatingRecords = [];\r\n    const enteringRecords = [];\r\n    const len = Math.max(from.matched.length, to.matched.length);\r\n    for (let i = 0; i < len; i++) {\r\n        const recordFrom = from.matched[i];\r\n        if (recordFrom) {\r\n            if (to.matched.find(record => isSameRouteRecord(record, recordFrom)))\r\n                updatingRecords.push(recordFrom);\r\n            else\r\n                leavingRecords.push(recordFrom);\r\n        }\r\n        const recordTo = to.matched[i];\r\n        if (recordTo) {\r\n            // the type doesn't matter because we are comparing per reference\r\n            if (!from.matched.find(record => isSameRouteRecord(record, recordTo))) {\r\n                enteringRecords.push(recordTo);\r\n            }\r\n        }\r\n    }\r\n    return [leavingRecords, updatingRecords, enteringRecords];\r\n}\n\n/**\r\n * Returns the router instance. Equivalent to using `$router` inside\r\n * templates.\r\n */\r\nfunction useRouter() {\r\n    return inject(routerKey);\r\n}\r\n/**\r\n * Returns the current route location. Equivalent to using `$route` inside\r\n * templates.\r\n */\r\nfunction useRoute() {\r\n    return inject(routeLocationKey);\r\n}\n\nexport { NavigationFailureType, RouterLink, RouterView, START_LOCATION_NORMALIZED as START_LOCATION, createMemoryHistory, createRouter, createRouterMatcher, createWebHashHistory, createWebHistory, isNavigationFailure, matchedRouteKey, onBeforeRouteLeave, onBeforeRouteUpdate, parseQuery, routeLocationKey, routerKey, routerViewLocationKey, stringifyQuery, useLink, useRoute, useRouter, viewDepthKey };\n","export default function getHTMLElementScroll(element) {\n  return {\n    scrollLeft: element.scrollLeft,\n    scrollTop: element.scrollTop\n  };\n}","import getWindowScroll from \"./getWindowScroll.js\";\nimport getWindow from \"./getWindow.js\";\nimport { isHTMLElement } from \"./instanceOf.js\";\nimport getHTMLElementScroll from \"./getHTMLElementScroll.js\";\nexport default function getNodeScroll(node) {\n  if (node === getWindow(node) || !isHTMLElement(node)) {\n    return getWindowScroll(node);\n  } else {\n    return getHTMLElementScroll(node);\n  }\n}","import getBoundingClientRect from \"./getBoundingClientRect.js\";\nimport getNodeScroll from \"./getNodeScroll.js\";\nimport getNodeName from \"./getNodeName.js\";\nimport { isHTMLElement } from \"./instanceOf.js\";\nimport getWindowScrollBarX from \"./getWindowScrollBarX.js\";\nimport getDocumentElement from \"./getDocumentElement.js\";\nimport isScrollParent from \"./isScrollParent.js\";\nimport { round } from \"../utils/math.js\";\n\nfunction isElementScaled(element) {\n  var rect = element.getBoundingClientRect();\n  var scaleX = round(rect.width) / element.offsetWidth || 1;\n  var scaleY = round(rect.height) / element.offsetHeight || 1;\n  return scaleX !== 1 || scaleY !== 1;\n} // Returns the composite rect of an element relative to its offsetParent.\n// Composite means it takes into account transforms as well as layout.\n\n\nexport default function getCompositeRect(elementOrVirtualElement, offsetParent, isFixed) {\n  if (isFixed === void 0) {\n    isFixed = false;\n  }\n\n  var isOffsetParentAnElement = isHTMLElement(offsetParent);\n  var offsetParentIsScaled = isHTMLElement(offsetParent) && isElementScaled(offsetParent);\n  var documentElement = getDocumentElement(offsetParent);\n  var rect = getBoundingClientRect(elementOrVirtualElement, offsetParentIsScaled);\n  var scroll = {\n    scrollLeft: 0,\n    scrollTop: 0\n  };\n  var offsets = {\n    x: 0,\n    y: 0\n  };\n\n  if (isOffsetParentAnElement || !isOffsetParentAnElement && !isFixed) {\n    if (getNodeName(offsetParent) !== 'body' || // https://github.com/popperjs/popper-core/issues/1078\n    isScrollParent(documentElement)) {\n      scroll = getNodeScroll(offsetParent);\n    }\n\n    if (isHTMLElement(offsetParent)) {\n      offsets = getBoundingClientRect(offsetParent, true);\n      offsets.x += offsetParent.clientLeft;\n      offsets.y += offsetParent.clientTop;\n    } else if (documentElement) {\n      offsets.x = getWindowScrollBarX(documentElement);\n    }\n  }\n\n  return {\n    x: rect.left + scroll.scrollLeft - offsets.x,\n    y: rect.top + scroll.scrollTop - offsets.y,\n    width: rect.width,\n    height: rect.height\n  };\n}","import { modifierPhases } from \"../enums.js\"; // source: https://stackoverflow.com/questions/49875255\n\nfunction order(modifiers) {\n  var map = new Map();\n  var visited = new Set();\n  var result = [];\n  modifiers.forEach(function (modifier) {\n    map.set(modifier.name, modifier);\n  }); // On visiting object, check for its dependencies and visit them recursively\n\n  function sort(modifier) {\n    visited.add(modifier.name);\n    var requires = [].concat(modifier.requires || [], modifier.requiresIfExists || []);\n    requires.forEach(function (dep) {\n      if (!visited.has(dep)) {\n        var depModifier = map.get(dep);\n\n        if (depModifier) {\n          sort(depModifier);\n        }\n      }\n    });\n    result.push(modifier);\n  }\n\n  modifiers.forEach(function (modifier) {\n    if (!visited.has(modifier.name)) {\n      // check for visited object\n      sort(modifier);\n    }\n  });\n  return result;\n}\n\nexport default function orderModifiers(modifiers) {\n  // order based on dependencies\n  var orderedModifiers = order(modifiers); // order based on phase\n\n  return modifierPhases.reduce(function (acc, phase) {\n    return acc.concat(orderedModifiers.filter(function (modifier) {\n      return modifier.phase === phase;\n    }));\n  }, []);\n}","export default function debounce(fn) {\n  var pending;\n  return function () {\n    if (!pending) {\n      pending = new Promise(function (resolve) {\n        Promise.resolve().then(function () {\n          pending = undefined;\n          resolve(fn());\n        });\n      });\n    }\n\n    return pending;\n  };\n}","export default function mergeByName(modifiers) {\n  var merged = modifiers.reduce(function (merged, current) {\n    var existing = merged[current.name];\n    merged[current.name] = existing ? Object.assign({}, existing, current, {\n      options: Object.assign({}, existing.options, current.options),\n      data: Object.assign({}, existing.data, current.data)\n    }) : current;\n    return merged;\n  }, {}); // IE11 does not support Object.values\n\n  return Object.keys(merged).map(function (key) {\n    return merged[key];\n  });\n}","import getCompositeRect from \"./dom-utils/getCompositeRect.js\";\nimport getLayoutRect from \"./dom-utils/getLayoutRect.js\";\nimport listScrollParents from \"./dom-utils/listScrollParents.js\";\nimport getOffsetParent from \"./dom-utils/getOffsetParent.js\";\nimport getComputedStyle from \"./dom-utils/getComputedStyle.js\";\nimport orderModifiers from \"./utils/orderModifiers.js\";\nimport debounce from \"./utils/debounce.js\";\nimport validateModifiers from \"./utils/validateModifiers.js\";\nimport uniqueBy from \"./utils/uniqueBy.js\";\nimport getBasePlacement from \"./utils/getBasePlacement.js\";\nimport mergeByName from \"./utils/mergeByName.js\";\nimport detectOverflow from \"./utils/detectOverflow.js\";\nimport { isElement } from \"./dom-utils/instanceOf.js\";\nimport { auto } from \"./enums.js\";\nvar INVALID_ELEMENT_ERROR = 'Popper: Invalid reference or popper argument provided. They must be either a DOM element or virtual element.';\nvar INFINITE_LOOP_ERROR = 'Popper: An infinite loop in the modifiers cycle has been detected! The cycle has been interrupted to prevent a browser crash.';\nvar DEFAULT_OPTIONS = {\n  placement: 'bottom',\n  modifiers: [],\n  strategy: 'absolute'\n};\n\nfunction areValidElements() {\n  for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n    args[_key] = arguments[_key];\n  }\n\n  return !args.some(function (element) {\n    return !(element && typeof element.getBoundingClientRect === 'function');\n  });\n}\n\nexport function popperGenerator(generatorOptions) {\n  if (generatorOptions === void 0) {\n    generatorOptions = {};\n  }\n\n  var _generatorOptions = generatorOptions,\n      _generatorOptions$def = _generatorOptions.defaultModifiers,\n      defaultModifiers = _generatorOptions$def === void 0 ? [] : _generatorOptions$def,\n      _generatorOptions$def2 = _generatorOptions.defaultOptions,\n      defaultOptions = _generatorOptions$def2 === void 0 ? DEFAULT_OPTIONS : _generatorOptions$def2;\n  return function createPopper(reference, popper, options) {\n    if (options === void 0) {\n      options = defaultOptions;\n    }\n\n    var state = {\n      placement: 'bottom',\n      orderedModifiers: [],\n      options: Object.assign({}, DEFAULT_OPTIONS, defaultOptions),\n      modifiersData: {},\n      elements: {\n        reference: reference,\n        popper: popper\n      },\n      attributes: {},\n      styles: {}\n    };\n    var effectCleanupFns = [];\n    var isDestroyed = false;\n    var instance = {\n      state: state,\n      setOptions: function setOptions(setOptionsAction) {\n        var options = typeof setOptionsAction === 'function' ? setOptionsAction(state.options) : setOptionsAction;\n        cleanupModifierEffects();\n        state.options = Object.assign({}, defaultOptions, state.options, options);\n        state.scrollParents = {\n          reference: isElement(reference) ? listScrollParents(reference) : reference.contextElement ? listScrollParents(reference.contextElement) : [],\n          popper: listScrollParents(popper)\n        }; // Orders the modifiers based on their dependencies and `phase`\n        // properties\n\n        var orderedModifiers = orderModifiers(mergeByName([].concat(defaultModifiers, state.options.modifiers))); // Strip out disabled modifiers\n\n        state.orderedModifiers = orderedModifiers.filter(function (m) {\n          return m.enabled;\n        }); // Validate the provided modifiers so that the consumer will get warned\n        // if one of the modifiers is invalid for any reason\n\n        if (process.env.NODE_ENV !== \"production\") {\n          var modifiers = uniqueBy([].concat(orderedModifiers, state.options.modifiers), function (_ref) {\n            var name = _ref.name;\n            return name;\n          });\n          validateModifiers(modifiers);\n\n          if (getBasePlacement(state.options.placement) === auto) {\n            var flipModifier = state.orderedModifiers.find(function (_ref2) {\n              var name = _ref2.name;\n              return name === 'flip';\n            });\n\n            if (!flipModifier) {\n              console.error(['Popper: \"auto\" placements require the \"flip\" modifier be', 'present and enabled to work.'].join(' '));\n            }\n          }\n\n          var _getComputedStyle = getComputedStyle(popper),\n              marginTop = _getComputedStyle.marginTop,\n              marginRight = _getComputedStyle.marginRight,\n              marginBottom = _getComputedStyle.marginBottom,\n              marginLeft = _getComputedStyle.marginLeft; // We no longer take into account `margins` on the popper, and it can\n          // cause bugs with positioning, so we'll warn the consumer\n\n\n          if ([marginTop, marginRight, marginBottom, marginLeft].some(function (margin) {\n            return parseFloat(margin);\n          })) {\n            console.warn(['Popper: CSS \"margin\" styles cannot be used to apply padding', 'between the popper and its reference element or boundary.', 'To replicate margin, use the `offset` modifier, as well as', 'the `padding` option in the `preventOverflow` and `flip`', 'modifiers.'].join(' '));\n          }\n        }\n\n        runModifierEffects();\n        return instance.update();\n      },\n      // Sync update – it will always be executed, even if not necessary. This\n      // is useful for low frequency updates where sync behavior simplifies the\n      // logic.\n      // For high frequency updates (e.g. `resize` and `scroll` events), always\n      // prefer the async Popper#update method\n      forceUpdate: function forceUpdate() {\n        if (isDestroyed) {\n          return;\n        }\n\n        var _state$elements = state.elements,\n            reference = _state$elements.reference,\n            popper = _state$elements.popper; // Don't proceed if `reference` or `popper` are not valid elements\n        // anymore\n\n        if (!areValidElements(reference, popper)) {\n          if (process.env.NODE_ENV !== \"production\") {\n            console.error(INVALID_ELEMENT_ERROR);\n          }\n\n          return;\n        } // Store the reference and popper rects to be read by modifiers\n\n\n        state.rects = {\n          reference: getCompositeRect(reference, getOffsetParent(popper), state.options.strategy === 'fixed'),\n          popper: getLayoutRect(popper)\n        }; // Modifiers have the ability to reset the current update cycle. The\n        // most common use case for this is the `flip` modifier changing the\n        // placement, which then needs to re-run all the modifiers, because the\n        // logic was previously ran for the previous placement and is therefore\n        // stale/incorrect\n\n        state.reset = false;\n        state.placement = state.options.placement; // On each update cycle, the `modifiersData` property for each modifier\n        // is filled with the initial data specified by the modifier. This means\n        // it doesn't persist and is fresh on each update.\n        // To ensure persistent data, use `${name}#persistent`\n\n        state.orderedModifiers.forEach(function (modifier) {\n          return state.modifiersData[modifier.name] = Object.assign({}, modifier.data);\n        });\n        var __debug_loops__ = 0;\n\n        for (var index = 0; index < state.orderedModifiers.length; index++) {\n          if (process.env.NODE_ENV !== \"production\") {\n            __debug_loops__ += 1;\n\n            if (__debug_loops__ > 100) {\n              console.error(INFINITE_LOOP_ERROR);\n              break;\n            }\n          }\n\n          if (state.reset === true) {\n            state.reset = false;\n            index = -1;\n            continue;\n          }\n\n          var _state$orderedModifie = state.orderedModifiers[index],\n              fn = _state$orderedModifie.fn,\n              _state$orderedModifie2 = _state$orderedModifie.options,\n              _options = _state$orderedModifie2 === void 0 ? {} : _state$orderedModifie2,\n              name = _state$orderedModifie.name;\n\n          if (typeof fn === 'function') {\n            state = fn({\n              state: state,\n              options: _options,\n              name: name,\n              instance: instance\n            }) || state;\n          }\n        }\n      },\n      // Async and optimistically optimized update – it will not be executed if\n      // not necessary (debounced to run at most once-per-tick)\n      update: debounce(function () {\n        return new Promise(function (resolve) {\n          instance.forceUpdate();\n          resolve(state);\n        });\n      }),\n      destroy: function destroy() {\n        cleanupModifierEffects();\n        isDestroyed = true;\n      }\n    };\n\n    if (!areValidElements(reference, popper)) {\n      if (process.env.NODE_ENV !== \"production\") {\n        console.error(INVALID_ELEMENT_ERROR);\n      }\n\n      return instance;\n    }\n\n    instance.setOptions(options).then(function (state) {\n      if (!isDestroyed && options.onFirstUpdate) {\n        options.onFirstUpdate(state);\n      }\n    }); // Modifiers have the ability to execute arbitrary code before the first\n    // update cycle runs. They will be executed in the same order as the update\n    // cycle. This is useful when a modifier adds some persistent data that\n    // other modifiers need to use, but the modifier is run after the dependent\n    // one.\n\n    function runModifierEffects() {\n      state.orderedModifiers.forEach(function (_ref3) {\n        var name = _ref3.name,\n            _ref3$options = _ref3.options,\n            options = _ref3$options === void 0 ? {} : _ref3$options,\n            effect = _ref3.effect;\n\n        if (typeof effect === 'function') {\n          var cleanupFn = effect({\n            state: state,\n            name: name,\n            instance: instance,\n            options: options\n          });\n\n          var noopFn = function noopFn() {};\n\n          effectCleanupFns.push(cleanupFn || noopFn);\n        }\n      });\n    }\n\n    function cleanupModifierEffects() {\n      effectCleanupFns.forEach(function (fn) {\n        return fn();\n      });\n      effectCleanupFns = [];\n    }\n\n    return instance;\n  };\n}\nexport var createPopper = /*#__PURE__*/popperGenerator(); // eslint-disable-next-line import/no-unused-modules\n\nexport { detectOverflow };",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function (undefined) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var CipherParams = C_lib.CipherParams;\n\t    var C_enc = C.enc;\n\t    var Hex = C_enc.Hex;\n\t    var C_format = C.format;\n\n\t    var HexFormatter = C_format.Hex = {\n\t        /**\n\t         * Converts the ciphertext of a cipher params object to a hexadecimally encoded string.\n\t         *\n\t         * @param {CipherParams} cipherParams The cipher params object.\n\t         *\n\t         * @return {string} The hexadecimally encoded string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var hexString = CryptoJS.format.Hex.stringify(cipherParams);\n\t         */\n\t        stringify: function (cipherParams) {\n\t            return cipherParams.ciphertext.toString(Hex);\n\t        },\n\n\t        /**\n\t         * Converts a hexadecimally encoded ciphertext string to a cipher params object.\n\t         *\n\t         * @param {string} input The hexadecimally encoded string.\n\t         *\n\t         * @return {CipherParams} The cipher params object.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var cipherParams = CryptoJS.format.Hex.parse(hexString);\n\t         */\n\t        parse: function (input) {\n\t            var ciphertext = Hex.parse(input);\n\t            return CipherParams.create({ ciphertext: ciphertext });\n\t        }\n\t    };\n\t}());\n\n\n\treturn CryptoJS.format.Hex;\n\n}));","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar InternalMetadataModule = require('../internals/internal-metadata');\nvar iterate = require('../internals/iterate');\nvar anInstance = require('../internals/an-instance');\nvar isObject = require('../internals/is-object');\nvar fails = require('../internals/fails');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar inheritIfRequired = require('../internals/inherit-if-required');\n\nmodule.exports = function (CONSTRUCTOR_NAME, wrapper, common) {\n  var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;\n  var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;\n  var ADDER = IS_MAP ? 'set' : 'add';\n  var NativeConstructor = global[CONSTRUCTOR_NAME];\n  var NativePrototype = NativeConstructor && NativeConstructor.prototype;\n  var Constructor = NativeConstructor;\n  var exported = {};\n\n  var fixMethod = function (KEY) {\n    var nativeMethod = NativePrototype[KEY];\n    redefine(NativePrototype, KEY,\n      KEY == 'add' ? function add(value) {\n        nativeMethod.call(this, value === 0 ? 0 : value);\n        return this;\n      } : KEY == 'delete' ? function (key) {\n        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : KEY == 'get' ? function get(key) {\n        return IS_WEAK && !isObject(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : KEY == 'has' ? function has(key) {\n        return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);\n      } : function set(key, value) {\n        nativeMethod.call(this, key === 0 ? 0 : key, value);\n        return this;\n      }\n    );\n  };\n\n  var REPLACE = isForced(\n    CONSTRUCTOR_NAME,\n    typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {\n      new NativeConstructor().entries().next();\n    }))\n  );\n\n  if (REPLACE) {\n    // create collection constructor\n    Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);\n    InternalMetadataModule.REQUIRED = true;\n  } else if (isForced(CONSTRUCTOR_NAME, true)) {\n    var instance = new Constructor();\n    // early implementations not supports chaining\n    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;\n    // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false\n    var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });\n    // most early implementations doesn't supports iterables, most modern - not close it correctly\n    // eslint-disable-next-line no-new -- required for testing\n    var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });\n    // for early implementations -0 and +0 not the same\n    var BUGGY_ZERO = !IS_WEAK && fails(function () {\n      // V8 ~ Chromium 42- fails only with 5+ elements\n      var $instance = new NativeConstructor();\n      var index = 5;\n      while (index--) $instance[ADDER](index, index);\n      return !$instance.has(-0);\n    });\n\n    if (!ACCEPT_ITERABLES) {\n      Constructor = wrapper(function (dummy, iterable) {\n        anInstance(dummy, Constructor, CONSTRUCTOR_NAME);\n        var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);\n        if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });\n        return that;\n      });\n      Constructor.prototype = NativePrototype;\n      NativePrototype.constructor = Constructor;\n    }\n\n    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {\n      fixMethod('delete');\n      fixMethod('has');\n      IS_MAP && fixMethod('get');\n    }\n\n    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);\n\n    // weak collections should not contains .clear method\n    if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;\n  }\n\n  exported[CONSTRUCTOR_NAME] = Constructor;\n  $({ global: true, forced: Constructor != NativeConstructor }, exported);\n\n  setToStringTag(Constructor, CONSTRUCTOR_NAME);\n\n  if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);\n\n  return Constructor;\n};\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar autoKeyword = \"auto\";\nvar directionSetting = {\n  \"\": true,\n  \"lr\": true,\n  \"rl\": true\n};\nvar alignSetting = {\n  \"start\": true,\n  \"middle\": true,\n  \"end\": true,\n  \"left\": true,\n  \"right\": true\n};\n\nfunction findDirectionSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var dir = directionSetting[value.toLowerCase()];\n  return dir ? value.toLowerCase() : false;\n}\n\nfunction findAlignSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var align = alignSetting[value.toLowerCase()];\n  return align ? value.toLowerCase() : false;\n}\n\nfunction extend(obj) {\n  var i = 1;\n  for (; i < arguments.length; i++) {\n    var cobj = arguments[i];\n    for (var p in cobj) {\n      obj[p] = cobj[p];\n    }\n  }\n\n  return obj;\n}\n\nfunction VTTCue(startTime, endTime, text) {\n  var cue = this;\n  var isIE8 = (/MSIE\\s8\\.0/).test(navigator.userAgent);\n  var baseObj = {};\n\n  if (isIE8) {\n    cue = document.createElement('custom');\n  } else {\n    baseObj.enumerable = true;\n  }\n\n  /**\n   * Shim implementation specific properties. These properties are not in\n   * the spec.\n   */\n\n  // Lets us know when the VTTCue's data has changed in such a way that we need\n  // to recompute its display state. This lets us compute its display state\n  // lazily.\n  cue.hasBeenReset = false;\n\n  /**\n   * VTTCue and TextTrackCue properties\n   * http://dev.w3.org/html5/webvtt/#vttcue-interface\n   */\n\n  var _id = \"\";\n  var _pauseOnExit = false;\n  var _startTime = startTime;\n  var _endTime = endTime;\n  var _text = text;\n  var _region = null;\n  var _vertical = \"\";\n  var _snapToLines = true;\n  var _line = \"auto\";\n  var _lineAlign = \"start\";\n  var _position = 50;\n  var _positionAlign = \"middle\";\n  var _size = 50;\n  var _align = \"middle\";\n\n  Object.defineProperty(cue,\n    \"id\", extend({}, baseObj, {\n      get: function() {\n        return _id;\n      },\n      set: function(value) {\n        _id = \"\" + value;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"pauseOnExit\", extend({}, baseObj, {\n      get: function() {\n        return _pauseOnExit;\n      },\n      set: function(value) {\n        _pauseOnExit = !!value;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"startTime\", extend({}, baseObj, {\n      get: function() {\n        return _startTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Start time must be set to a number.\");\n        }\n        _startTime = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"endTime\", extend({}, baseObj, {\n      get: function() {\n        return _endTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"End time must be set to a number.\");\n        }\n        _endTime = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"text\", extend({}, baseObj, {\n      get: function() {\n        return _text;\n      },\n      set: function(value) {\n        _text = \"\" + value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"region\", extend({}, baseObj, {\n      get: function() {\n        return _region;\n      },\n      set: function(value) {\n        _region = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"vertical\", extend({}, baseObj, {\n      get: function() {\n        return _vertical;\n      },\n      set: function(value) {\n        var setting = findDirectionSetting(value);\n        // Have to check for false because the setting an be an empty string.\n        if (setting === false) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _vertical = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"snapToLines\", extend({}, baseObj, {\n      get: function() {\n        return _snapToLines;\n      },\n      set: function(value) {\n        _snapToLines = !!value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"line\", extend({}, baseObj, {\n      get: function() {\n        return _line;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\" && value !== autoKeyword) {\n          throw new SyntaxError(\"An invalid number or illegal string was specified.\");\n        }\n        _line = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"lineAlign\", extend({}, baseObj, {\n      get: function() {\n        return _lineAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _lineAlign = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"position\", extend({}, baseObj, {\n      get: function() {\n        return _position;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Position must be between 0 and 100.\");\n        }\n        _position = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"positionAlign\", extend({}, baseObj, {\n      get: function() {\n        return _positionAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _positionAlign = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"size\", extend({}, baseObj, {\n      get: function() {\n        return _size;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Size must be between 0 and 100.\");\n        }\n        _size = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"align\", extend({}, baseObj, {\n      get: function() {\n        return _align;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _align = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  /**\n   * Other <track> spec defined properties\n   */\n\n  // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n  cue.displayState = undefined;\n\n  if (isIE8) {\n    return cue;\n  }\n}\n\n/**\n * VTTCue methods\n */\n\nVTTCue.prototype.getCueAsHTML = function() {\n  // Assume WebVTT.convertCueToDOMTree is on the global.\n  return WebVTT.convertCueToDOMTree(window, this.text);\n};\n\nmodule.exports = VTTCue;\n","/**\n * @file source-updater.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar noop = function noop() {};\n\n/**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the\n * SourceBuffer from\n * @param {String} mimeType the desired MIME type of the underlying\n * SourceBuffer\n */\n\nvar SourceUpdater = (function () {\n  function SourceUpdater(mediaSource, mimeType) {\n    var _this = this;\n\n    _classCallCheck(this, SourceUpdater);\n\n    var createSourceBuffer = function createSourceBuffer() {\n      _this.sourceBuffer_ = mediaSource.addSourceBuffer(mimeType);\n\n      // run completion handlers and process callbacks as updateend\n      // events fire\n      _this.onUpdateendCallback_ = function () {\n        var pendingCallback = _this.pendingCallback_;\n\n        _this.pendingCallback_ = null;\n\n        if (pendingCallback) {\n          pendingCallback();\n        }\n\n        _this.runCallback_();\n      };\n\n      _this.sourceBuffer_.addEventListener('updateend', _this.onUpdateendCallback_);\n\n      _this.runCallback_();\n    };\n\n    this.callbacks_ = [];\n    this.pendingCallback_ = null;\n    this.timestampOffset_ = 0;\n    this.mediaSource = mediaSource;\n    this.processedAppend_ = false;\n\n    if (mediaSource.readyState === 'closed') {\n      mediaSource.addEventListener('sourceopen', createSourceBuffer);\n    } else {\n      createSourceBuffer();\n    }\n  }\n\n  /**\n   * Aborts the current segment and resets the segment parser.\n   *\n   * @param {Function} done function to call when done\n   * @see http://w3c.github.io/media-source/#widl-SourceBuffer-abort-void\n   */\n\n  _createClass(SourceUpdater, [{\n    key: 'abort',\n    value: function abort(done) {\n      var _this2 = this;\n\n      if (this.processedAppend_) {\n        this.queueCallback_(function () {\n          _this2.sourceBuffer_.abort();\n        }, done);\n      }\n    }\n\n    /**\n     * Queue an update to append an ArrayBuffer.\n     *\n     * @param {ArrayBuffer} bytes\n     * @param {Function} done the function to call when done\n     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n     */\n  }, {\n    key: 'appendBuffer',\n    value: function appendBuffer(bytes, done) {\n      var _this3 = this;\n\n      this.processedAppend_ = true;\n      this.queueCallback_(function () {\n        _this3.sourceBuffer_.appendBuffer(bytes);\n      }, done);\n    }\n\n    /**\n     * Indicates what TimeRanges are buffered in the managed SourceBuffer.\n     *\n     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-buffered\n     */\n  }, {\n    key: 'buffered',\n    value: function buffered() {\n      if (!this.sourceBuffer_) {\n        return _videoJs2['default'].createTimeRanges();\n      }\n      return this.sourceBuffer_.buffered;\n    }\n\n    /**\n     * Queue an update to remove a time range from the buffer.\n     *\n     * @param {Number} start where to start the removal\n     * @param {Number} end where to end the removal\n     * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n     */\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      var _this4 = this;\n\n      if (this.processedAppend_) {\n        this.queueCallback_(function () {\n          _this4.sourceBuffer_.remove(start, end);\n        }, noop);\n      }\n    }\n\n    /**\n     * Whether the underlying sourceBuffer is updating or not\n     *\n     * @return {Boolean} the updating status of the SourceBuffer\n     */\n  }, {\n    key: 'updating',\n    value: function updating() {\n      return !this.sourceBuffer_ || this.sourceBuffer_.updating || this.pendingCallback_;\n    }\n\n    /**\n     * Set/get the timestampoffset on the SourceBuffer\n     *\n     * @return {Number} the timestamp offset\n     */\n  }, {\n    key: 'timestampOffset',\n    value: function timestampOffset(offset) {\n      var _this5 = this;\n\n      if (typeof offset !== 'undefined') {\n        this.queueCallback_(function () {\n          _this5.sourceBuffer_.timestampOffset = offset;\n        });\n        this.timestampOffset_ = offset;\n      }\n      return this.timestampOffset_;\n    }\n\n    /**\n     * Queue a callback to run\n     */\n  }, {\n    key: 'queueCallback_',\n    value: function queueCallback_(callback, done) {\n      this.callbacks_.push([callback.bind(this), done]);\n      this.runCallback_();\n    }\n\n    /**\n     * Run a queued callback\n     */\n  }, {\n    key: 'runCallback_',\n    value: function runCallback_() {\n      var callbacks = undefined;\n\n      if (!this.updating() && this.callbacks_.length) {\n        callbacks = this.callbacks_.shift();\n        this.pendingCallback_ = callbacks[1];\n        callbacks[0]();\n      }\n    }\n\n    /**\n     * dispose of the source updater and the underlying sourceBuffer\n     */\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.sourceBuffer_.removeEventListener('updateend', this.onUpdateendCallback_);\n      if (this.sourceBuffer_ && this.mediaSource.readyState === 'open') {\n        this.sourceBuffer_.abort();\n      }\n    }\n  }]);\n\n  return SourceUpdater;\n})();\n\nexports['default'] = SourceUpdater;\nmodule.exports = exports['default'];","var global = require('../internals/global');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar setGlobal = require('../internals/set-global');\nvar inspectSource = require('../internals/inspect-source');\nvar InternalStateModule = require('../internals/internal-state');\n\nvar getInternalState = InternalStateModule.get;\nvar enforceInternalState = InternalStateModule.enforce;\nvar TEMPLATE = String(String).split('String');\n\n(module.exports = function (O, key, value, options) {\n  var unsafe = options ? !!options.unsafe : false;\n  var simple = options ? !!options.enumerable : false;\n  var noTargetGet = options ? !!options.noTargetGet : false;\n  var state;\n  if (typeof value == 'function') {\n    if (typeof key == 'string' && !has(value, 'name')) {\n      createNonEnumerableProperty(value, 'name', key);\n    }\n    state = enforceInternalState(value);\n    if (!state.source) {\n      state.source = TEMPLATE.join(typeof key == 'string' ? key : '');\n    }\n  }\n  if (O === global) {\n    if (simple) O[key] = value;\n    else setGlobal(key, value);\n    return;\n  } else if (!unsafe) {\n    delete O[key];\n  } else if (!noTargetGet && O[key]) {\n    simple = true;\n  }\n  if (simple) O[key] = value;\n  else createNonEnumerableProperty(O, key, value);\n// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative\n})(Function.prototype, 'toString', function toString() {\n  return typeof this == 'function' && getInternalState(this).source || inspectSource(this);\n});\n","'use strict';\n\nvar utils = require('../utils');\nvar common = require('../common');\nvar shaCommon = require('./common');\nvar assert = require('minimalistic-assert');\n\nvar sum32 = utils.sum32;\nvar sum32_4 = utils.sum32_4;\nvar sum32_5 = utils.sum32_5;\nvar ch32 = shaCommon.ch32;\nvar maj32 = shaCommon.maj32;\nvar s0_256 = shaCommon.s0_256;\nvar s1_256 = shaCommon.s1_256;\nvar g0_256 = shaCommon.g0_256;\nvar g1_256 = shaCommon.g1_256;\n\nvar BlockHash = common.BlockHash;\n\nvar sha256_K = [\n  0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,\n  0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,\n  0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,\n  0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,\n  0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,\n  0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,\n  0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,\n  0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,\n  0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,\n  0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,\n  0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,\n  0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,\n  0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,\n  0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,\n  0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,\n  0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2\n];\n\nfunction SHA256() {\n  if (!(this instanceof SHA256))\n    return new SHA256();\n\n  BlockHash.call(this);\n  this.h = [\n    0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,\n    0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19\n  ];\n  this.k = sha256_K;\n  this.W = new Array(64);\n}\nutils.inherits(SHA256, BlockHash);\nmodule.exports = SHA256;\n\nSHA256.blockSize = 512;\nSHA256.outSize = 256;\nSHA256.hmacStrength = 192;\nSHA256.padLength = 64;\n\nSHA256.prototype._update = function _update(msg, start) {\n  var W = this.W;\n\n  for (var i = 0; i < 16; i++)\n    W[i] = msg[start + i];\n  for (; i < W.length; i++)\n    W[i] = sum32_4(g1_256(W[i - 2]), W[i - 7], g0_256(W[i - 15]), W[i - 16]);\n\n  var a = this.h[0];\n  var b = this.h[1];\n  var c = this.h[2];\n  var d = this.h[3];\n  var e = this.h[4];\n  var f = this.h[5];\n  var g = this.h[6];\n  var h = this.h[7];\n\n  assert(this.k.length === W.length);\n  for (i = 0; i < W.length; i++) {\n    var T1 = sum32_5(h, s1_256(e), ch32(e, f, g), this.k[i], W[i]);\n    var T2 = sum32(s0_256(a), maj32(a, b, c));\n    h = g;\n    g = f;\n    f = e;\n    e = sum32(d, T1);\n    d = c;\n    c = b;\n    b = a;\n    a = sum32(T1, T2);\n  }\n\n  this.h[0] = sum32(this.h[0], a);\n  this.h[1] = sum32(this.h[1], b);\n  this.h[2] = sum32(this.h[2], c);\n  this.h[3] = sum32(this.h[3], d);\n  this.h[4] = sum32(this.h[4], e);\n  this.h[5] = sum32(this.h[5], f);\n  this.h[6] = sum32(this.h[6], g);\n  this.h[7] = sum32(this.h[7], h);\n};\n\nSHA256.prototype._digest = function digest(enc) {\n  if (enc === 'hex')\n    return utils.toHex32(this.h, 'big');\n  else\n    return utils.split32(this.h, 'big');\n};\n","function _isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n\n  try {\n    Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\nmodule.exports = _isNativeReflectConstruct;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","// much of this based on https://github.com/indutny/self-signed/blob/gh-pages/lib/rsa.js\nvar Buffer = require('safe-buffer').Buffer\nvar createHmac = require('create-hmac')\nvar crt = require('browserify-rsa')\nvar EC = require('elliptic').ec\nvar BN = require('bn.js')\nvar parseKeys = require('parse-asn1')\nvar curves = require('./curves.json')\n\nfunction sign (hash, key, hashType, signType, tag) {\n  var priv = parseKeys(key)\n  if (priv.curve) {\n    // rsa keys can be interpreted as ecdsa ones in openssl\n    if (signType !== 'ecdsa' && signType !== 'ecdsa/rsa') throw new Error('wrong private key type')\n    return ecSign(hash, priv)\n  } else if (priv.type === 'dsa') {\n    if (signType !== 'dsa') throw new Error('wrong private key type')\n    return dsaSign(hash, priv, hashType)\n  } else {\n    if (signType !== 'rsa' && signType !== 'ecdsa/rsa') throw new Error('wrong private key type')\n  }\n  hash = Buffer.concat([tag, hash])\n  var len = priv.modulus.byteLength()\n  var pad = [0, 1]\n  while (hash.length + pad.length + 1 < len) pad.push(0xff)\n  pad.push(0x00)\n  var i = -1\n  while (++i < hash.length) pad.push(hash[i])\n\n  var out = crt(pad, priv)\n  return out\n}\n\nfunction ecSign (hash, priv) {\n  var curveId = curves[priv.curve.join('.')]\n  if (!curveId) throw new Error('unknown curve ' + priv.curve.join('.'))\n\n  var curve = new EC(curveId)\n  var key = curve.keyFromPrivate(priv.privateKey)\n  var out = key.sign(hash)\n\n  return Buffer.from(out.toDER())\n}\n\nfunction dsaSign (hash, priv, algo) {\n  var x = priv.params.priv_key\n  var p = priv.params.p\n  var q = priv.params.q\n  var g = priv.params.g\n  var r = new BN(0)\n  var k\n  var H = bits2int(hash, q).mod(q)\n  var s = false\n  var kv = getKey(x, q, hash, algo)\n  while (s === false) {\n    k = makeKey(q, kv, algo)\n    r = makeR(g, k, p, q)\n    s = k.invm(q).imul(H.add(x.mul(r))).mod(q)\n    if (s.cmpn(0) === 0) {\n      s = false\n      r = new BN(0)\n    }\n  }\n  return toDER(r, s)\n}\n\nfunction toDER (r, s) {\n  r = r.toArray()\n  s = s.toArray()\n\n  // Pad values\n  if (r[0] & 0x80) r = [0].concat(r)\n  if (s[0] & 0x80) s = [0].concat(s)\n\n  var total = r.length + s.length + 4\n  var res = [0x30, total, 0x02, r.length]\n  res = res.concat(r, [0x02, s.length], s)\n  return Buffer.from(res)\n}\n\nfunction getKey (x, q, hash, algo) {\n  x = Buffer.from(x.toArray())\n  if (x.length < q.byteLength()) {\n    var zeros = Buffer.alloc(q.byteLength() - x.length)\n    x = Buffer.concat([zeros, x])\n  }\n  var hlen = hash.length\n  var hbits = bits2octets(hash, q)\n  var v = Buffer.alloc(hlen)\n  v.fill(1)\n  var k = Buffer.alloc(hlen)\n  k = createHmac(algo, k).update(v).update(Buffer.from([0])).update(x).update(hbits).digest()\n  v = createHmac(algo, k).update(v).digest()\n  k = createHmac(algo, k).update(v).update(Buffer.from([1])).update(x).update(hbits).digest()\n  v = createHmac(algo, k).update(v).digest()\n  return { k: k, v: v }\n}\n\nfunction bits2int (obits, q) {\n  var bits = new BN(obits)\n  var shift = (obits.length << 3) - q.bitLength()\n  if (shift > 0) bits.ishrn(shift)\n  return bits\n}\n\nfunction bits2octets (bits, q) {\n  bits = bits2int(bits, q)\n  bits = bits.mod(q)\n  var out = Buffer.from(bits.toArray())\n  if (out.length < q.byteLength()) {\n    var zeros = Buffer.alloc(q.byteLength() - out.length)\n    out = Buffer.concat([zeros, out])\n  }\n  return out\n}\n\nfunction makeKey (q, kv, algo) {\n  var t\n  var k\n\n  do {\n    t = Buffer.alloc(0)\n\n    while (t.length * 8 < q.bitLength()) {\n      kv.v = createHmac(algo, kv.k).update(kv.v).digest()\n      t = Buffer.concat([t, kv.v])\n    }\n\n    k = bits2int(t, q)\n    kv.k = createHmac(algo, kv.k).update(kv.v).update(Buffer.from([0])).digest()\n    kv.v = createHmac(algo, kv.k).update(kv.v).digest()\n  } while (k.cmp(q) !== -1)\n\n  return k\n}\n\nfunction makeR (g, k, p, q) {\n  return g.toRed(BN.mont(p)).redPow(k).fromRed().mod(q)\n}\n\nmodule.exports = sign\nmodule.exports.getKey = getKey\nmodule.exports.makeKey = makeKey\n","'use strict';\n\nvar TagList = function() {\n  var self = this;\n\n  this.list = [];\n\n  this.push = function(tag) {\n    this.list.push({\n      bytes: tag.bytes,\n      dts: tag.dts,\n      pts: tag.pts,\n      keyFrame: tag.keyFrame,\n      metaDataTag: tag.metaDataTag\n    });\n  };\n\n  Object.defineProperty(this, 'length', {\n    get: function() {\n      return self.list.length;\n    }\n  });\n};\n\nmodule.exports = TagList;\n","/**\n * mux.js\n *\n * Copyright (c) 2015 Brightcove\n * All rights reserved.\n *\n * A stream-based mp2t to mp4 converter. This utility can be used to\n * deliver mp4s to a SourceBuffer on platforms that support native\n * Media Source Extensions.\n */\n'use strict';\nvar Stream = require('../utils/stream.js'),\n  CaptionStream = require('./caption-stream'),\n  StreamTypes = require('./stream-types'),\n  TimestampRolloverStream = require('./timestamp-rollover-stream').TimestampRolloverStream;\n\nvar m2tsStreamTypes = require('./stream-types.js');\n\n// object types\nvar TransportPacketStream, TransportParseStream, ElementaryStream;\n\n// constants\nvar\n  MP2T_PACKET_LENGTH = 188, // bytes\n  SYNC_BYTE = 0x47;\n\n/**\n * Splits an incoming stream of binary data into MPEG-2 Transport\n * Stream packets.\n */\nTransportPacketStream = function() {\n  var\n    buffer = new Uint8Array(MP2T_PACKET_LENGTH),\n    bytesInBuffer = 0;\n\n  TransportPacketStream.prototype.init.call(this);\n\n   // Deliver new bytes to the stream.\n\n  this.push = function(bytes) {\n    var\n      startIndex = 0,\n      endIndex = MP2T_PACKET_LENGTH,\n      everything;\n\n    // If there are bytes remaining from the last segment, prepend them to the\n    // bytes that were pushed in\n    if (bytesInBuffer) {\n      everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n      everything.set(buffer.subarray(0, bytesInBuffer));\n      everything.set(bytes, bytesInBuffer);\n      bytesInBuffer = 0;\n    } else {\n      everything = bytes;\n    }\n\n    // While we have enough data for a packet\n    while (endIndex < everything.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (everything[startIndex] === SYNC_BYTE && everything[endIndex] === SYNC_BYTE) {\n        // We found a packet so emit it and jump one whole packet forward in\n        // the stream\n        this.trigger('data', everything.subarray(startIndex, endIndex));\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      }\n      // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n      startIndex++;\n      endIndex++;\n    }\n\n    // If there was some data left over at the end of the segment that couldn't\n    // possibly be a whole packet, keep it because it might be the start of a packet\n    // that continues in the next segment\n    if (startIndex < everything.byteLength) {\n      buffer.set(everything.subarray(startIndex), 0);\n      bytesInBuffer = everything.byteLength - startIndex;\n    }\n  };\n\n  this.flush = function() {\n    // If the buffer contains a whole packet when we are being flushed, emit it\n    // and empty the buffer. Otherwise hold onto the data because it may be\n    // important for decoding the next segment\n    if (bytesInBuffer === MP2T_PACKET_LENGTH && buffer[0] === SYNC_BYTE) {\n      this.trigger('data', buffer);\n      bytesInBuffer = 0;\n    }\n    this.trigger('done');\n  };\n};\nTransportPacketStream.prototype = new Stream();\n\n/**\n * Accepts an MP2T TransportPacketStream and emits data events with parsed\n * forms of the individual transport stream packets.\n */\nTransportParseStream = function() {\n  var parsePsi, parsePat, parsePmt, self;\n  TransportParseStream.prototype.init.call(this);\n  self = this;\n\n  this.packetsWaitingForPmt = [];\n  this.programMapTable = undefined;\n\n  parsePsi = function(payload, psi) {\n    var offset = 0;\n\n    // PSI packets may be split into multiple sections and those\n    // sections may be split into multiple packets. If a PSI\n    // section starts in this packet, the payload_unit_start_indicator\n    // will be true and the first byte of the payload will indicate\n    // the offset from the current position to the start of the\n    // section.\n    if (psi.payloadUnitStartIndicator) {\n      offset += payload[offset] + 1;\n    }\n\n    if (psi.type === 'pat') {\n      parsePat(payload.subarray(offset), psi);\n    } else {\n      parsePmt(payload.subarray(offset), psi);\n    }\n  };\n\n  parsePat = function(payload, pat) {\n    pat.section_number = payload[7]; // eslint-disable-line camelcase\n    pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n\n    // skip the PSI header and parse the first PMT entry\n    self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n    pat.pmtPid = self.pmtPid;\n  };\n\n  /**\n   * Parse out the relevant fields of a Program Map Table (PMT).\n   * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n   * packet. The first byte in this array should be the table_id\n   * field.\n   * @param pmt {object} the object that should be decorated with\n   * fields parsed from the PMT.\n   */\n  parsePmt = function(payload, pmt) {\n    var sectionLength, tableEnd, programInfoLength, offset;\n\n    // PMTs can be sent ahead of the time when they should actually\n    // take effect. We don't believe this should ever be the case\n    // for HLS but we'll ignore \"forward\" PMT declarations if we see\n    // them. Future PMT declarations have the current_next_indicator\n    // set to zero.\n    if (!(payload[5] & 0x01)) {\n      return;\n    }\n\n    // overwrite any existing program map table\n    self.programMapTable = {\n      video: null,\n      audio: null,\n      'timed-metadata': {}\n    };\n\n    // the mapping table ends at the end of the current section\n    sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n    tableEnd = 3 + sectionLength - 4;\n\n    // to determine where the table is, we have to figure out how\n    // long the program info descriptors are\n    programInfoLength = (payload[10] & 0x0f) << 8 | payload[11];\n\n    // advance the offset to the first entry in the mapping table\n    offset = 12 + programInfoLength;\n    while (offset < tableEnd) {\n      var streamType = payload[offset];\n      var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2];\n\n      // only map a single elementary_pid for audio and video stream types\n      // TODO: should this be done for metadata too? for now maintain behavior of\n      //       multiple metadata streams\n      if (streamType === StreamTypes.H264_STREAM_TYPE &&\n          self.programMapTable.video === null) {\n        self.programMapTable.video = pid;\n      } else if (streamType === StreamTypes.ADTS_STREAM_TYPE &&\n                 self.programMapTable.audio === null) {\n        self.programMapTable.audio = pid;\n      } else if (streamType === StreamTypes.METADATA_STREAM_TYPE) {\n        // map pid to stream type for metadata streams\n        self.programMapTable['timed-metadata'][pid] = streamType;\n      }\n\n      // move to the next table entry\n      // skip past the elementary stream descriptors, if present\n      offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n    }\n\n    // record the map on the packet as well\n    pmt.programMapTable = self.programMapTable;\n  };\n\n  /**\n   * Deliver a new MP2T packet to the stream.\n   */\n  this.push = function(packet) {\n    var\n      result = {},\n      offset = 4;\n\n    result.payloadUnitStartIndicator = !!(packet[1] & 0x40);\n\n    // pid is a 13-bit field starting at the last bit of packet[1]\n    result.pid = packet[1] & 0x1f;\n    result.pid <<= 8;\n    result.pid |= packet[2];\n\n    // if an adaption field is present, its length is specified by the\n    // fifth byte of the TS packet header. The adaptation field is\n    // used to add stuffing to PES packets that don't fill a complete\n    // TS packet, and to specify some forms of timing and control data\n    // that we do not currently use.\n    if (((packet[3] & 0x30) >>> 4) > 0x01) {\n      offset += packet[offset] + 1;\n    }\n\n    // parse the rest of the packet based on the type\n    if (result.pid === 0) {\n      result.type = 'pat';\n      parsePsi(packet.subarray(offset), result);\n      this.trigger('data', result);\n    } else if (result.pid === this.pmtPid) {\n      result.type = 'pmt';\n      parsePsi(packet.subarray(offset), result);\n      this.trigger('data', result);\n\n      // if there are any packets waiting for a PMT to be found, process them now\n      while (this.packetsWaitingForPmt.length) {\n        this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n      }\n    } else if (this.programMapTable === undefined) {\n      // When we have not seen a PMT yet, defer further processing of\n      // PES packets until one has been parsed\n      this.packetsWaitingForPmt.push([packet, offset, result]);\n    } else {\n      this.processPes_(packet, offset, result);\n    }\n  };\n\n  this.processPes_ = function(packet, offset, result) {\n    // set the appropriate stream type\n    if (result.pid === this.programMapTable.video) {\n      result.streamType = StreamTypes.H264_STREAM_TYPE;\n    } else if (result.pid === this.programMapTable.audio) {\n      result.streamType = StreamTypes.ADTS_STREAM_TYPE;\n    } else {\n      // if not video or audio, it is timed-metadata or unknown\n      // if unknown, streamType will be undefined\n      result.streamType = this.programMapTable['timed-metadata'][result.pid];\n    }\n\n    result.type = 'pes';\n    result.data = packet.subarray(offset);\n\n    this.trigger('data', result);\n  };\n\n};\nTransportParseStream.prototype = new Stream();\nTransportParseStream.STREAM_TYPES  = {\n  h264: 0x1b,\n  adts: 0x0f\n};\n\n/**\n * Reconsistutes program elementary stream (PES) packets from parsed\n * transport stream packets. That is, if you pipe an\n * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n * events will be events which capture the bytes for individual PES\n * packets plus relevant metadata that has been extracted from the\n * container.\n */\nElementaryStream = function() {\n  var\n    self = this,\n    // PES packet fragments\n    video = {\n      data: [],\n      size: 0\n    },\n    audio = {\n      data: [],\n      size: 0\n    },\n    timedMetadata = {\n      data: [],\n      size: 0\n    },\n    parsePes = function(payload, pes) {\n      var ptsDtsFlags;\n\n      // get the packet length, this will be 0 for video\n      pes.packetLength = 6 + ((payload[4] << 8) | payload[5]);\n\n      // find out if this packets starts a new keyframe\n      pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0;\n      // PES packets may be annotated with a PTS value, or a PTS value\n      // and a DTS value. Determine what combination of values is\n      // available to work with.\n      ptsDtsFlags = payload[7];\n\n      // PTS and DTS are normally stored as a 33-bit number.  Javascript\n      // performs all bitwise operations on 32-bit integers but javascript\n      // supports a much greater range (52-bits) of integer using standard\n      // mathematical operations.\n      // We construct a 31-bit value using bitwise operators over the 31\n      // most significant bits and then multiply by 4 (equal to a left-shift\n      // of 2) before we add the final 2 least significant bits of the\n      // timestamp (equal to an OR.)\n      if (ptsDtsFlags & 0xC0) {\n        // the PTS and DTS are not written out directly. For information\n        // on how they are encoded, see\n        // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n        pes.pts = (payload[9] & 0x0E) << 27 |\n          (payload[10] & 0xFF) << 20 |\n          (payload[11] & 0xFE) << 12 |\n          (payload[12] & 0xFF) <<  5 |\n          (payload[13] & 0xFE) >>>  3;\n        pes.pts *= 4; // Left shift by 2\n        pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n        pes.dts = pes.pts;\n        if (ptsDtsFlags & 0x40) {\n          pes.dts = (payload[14] & 0x0E) << 27 |\n            (payload[15] & 0xFF) << 20 |\n            (payload[16] & 0xFE) << 12 |\n            (payload[17] & 0xFF) << 5 |\n            (payload[18] & 0xFE) >>> 3;\n          pes.dts *= 4; // Left shift by 2\n          pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n        }\n      }\n      // the data section starts immediately after the PES header.\n      // pes_header_data_length specifies the number of header bytes\n      // that follow the last byte of the field.\n      pes.data = payload.subarray(9 + payload[8]);\n    },\n    flushStream = function(stream, type, forceFlush) {\n      var\n        packetData = new Uint8Array(stream.size),\n        event = {\n          type: type\n        },\n        i = 0,\n        offset = 0,\n        packetFlushable = false,\n        fragment;\n\n      // do nothing if there is not enough buffered data for a complete\n      // PES header\n      if (!stream.data.length || stream.size < 9) {\n        return;\n      }\n      event.trackId = stream.data[0].pid;\n\n      // reassemble the packet\n      for (i = 0; i < stream.data.length; i++) {\n        fragment = stream.data[i];\n\n        packetData.set(fragment.data, offset);\n        offset += fragment.data.byteLength;\n      }\n\n      // parse assembled packet's PES header\n      parsePes(packetData, event);\n\n      // non-video PES packets MUST have a non-zero PES_packet_length\n      // check that there is enough stream data to fill the packet\n      packetFlushable = type === 'video' || event.packetLength <= stream.size;\n\n      // flush pending packets if the conditions are right\n      if (forceFlush || packetFlushable) {\n        stream.size = 0;\n        stream.data.length = 0;\n      }\n\n      // only emit packets that are complete. this is to avoid assembling\n      // incomplete PES packets due to poor segmentation\n      if (packetFlushable) {\n        self.trigger('data', event);\n      }\n    };\n\n  ElementaryStream.prototype.init.call(this);\n\n  this.push = function(data) {\n    ({\n      pat: function() {\n        // we have to wait for the PMT to arrive as well before we\n        // have any meaningful metadata\n      },\n      pes: function() {\n        var stream, streamType;\n\n        switch (data.streamType) {\n        case StreamTypes.H264_STREAM_TYPE:\n        case m2tsStreamTypes.H264_STREAM_TYPE:\n          stream = video;\n          streamType = 'video';\n          break;\n        case StreamTypes.ADTS_STREAM_TYPE:\n          stream = audio;\n          streamType = 'audio';\n          break;\n        case StreamTypes.METADATA_STREAM_TYPE:\n          stream = timedMetadata;\n          streamType = 'timed-metadata';\n          break;\n        default:\n          // ignore unknown stream types\n          return;\n        }\n\n        // if a new packet is starting, we can flush the completed\n        // packet\n        if (data.payloadUnitStartIndicator) {\n          flushStream(stream, streamType, true);\n        }\n\n        // buffer this fragment until we are sure we've received the\n        // complete payload\n        stream.data.push(data);\n        stream.size += data.data.byteLength;\n      },\n      pmt: function() {\n        var\n          event = {\n            type: 'metadata',\n            tracks: []\n          },\n          programMapTable = data.programMapTable;\n\n        // translate audio and video streams to tracks\n        if (programMapTable.video !== null) {\n          event.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.video,\n            codec: 'avc',\n            type: 'video'\n          });\n        }\n        if (programMapTable.audio !== null) {\n          event.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.audio,\n            codec: 'adts',\n            type: 'audio'\n          });\n        }\n\n        self.trigger('data', event);\n      }\n    })[data.type]();\n  };\n\n  /**\n   * Flush any remaining input. Video PES packets may be of variable\n   * length. Normally, the start of a new video packet can trigger the\n   * finalization of the previous packet. That is not possible if no\n   * more video is forthcoming, however. In that case, some other\n   * mechanism (like the end of the file) has to be employed. When it is\n   * clear that no additional data is forthcoming, calling this method\n   * will flush the buffered packets.\n   */\n  this.flush = function() {\n    // !!THIS ORDER IS IMPORTANT!!\n    // video first then audio\n    flushStream(video, 'video');\n    flushStream(audio, 'audio');\n    flushStream(timedMetadata, 'timed-metadata');\n    this.trigger('done');\n  };\n};\nElementaryStream.prototype = new Stream();\n\nvar m2ts = {\n  PAT_PID: 0x0000,\n  MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH,\n  TransportPacketStream: TransportPacketStream,\n  TransportParseStream: TransportParseStream,\n  ElementaryStream: ElementaryStream,\n  TimestampRolloverStream: TimestampRolloverStream,\n  CaptionStream: CaptionStream.CaptionStream,\n  Cea608Stream: CaptionStream.Cea608Stream,\n  MetadataStream: require('./metadata-stream')\n};\n\nfor (var type in StreamTypes) {\n  if (StreamTypes.hasOwnProperty(type)) {\n    m2ts[type] = StreamTypes[type];\n  }\n}\n\nmodule.exports = m2ts;\n","'use strict';\n\nvar Stream = require('../utils/stream.js');\n\n/**\n * The final stage of the transmuxer that emits the flv tags\n * for audio, video, and metadata. Also tranlates in time and\n * outputs caption data and id3 cues.\n */\nvar CoalesceStream = function(options) {\n  // Number of Tracks per output segment\n  // If greater than 1, we combine multiple\n  // tracks into a single segment\n  this.numberOfTracks = 0;\n  this.metadataStream = options.metadataStream;\n\n  this.videoTags = [];\n  this.audioTags = [];\n  this.videoTrack = null;\n  this.audioTrack = null;\n  this.pendingCaptions = [];\n  this.pendingMetadata = [];\n  this.pendingTracks = 0;\n  this.processedTracks = 0;\n\n  CoalesceStream.prototype.init.call(this);\n\n  // Take output from multiple\n  this.push = function(output) {\n    // buffer incoming captions until the associated video segment\n    // finishes\n    if (output.text) {\n      return this.pendingCaptions.push(output);\n    }\n    // buffer incoming id3 tags until the final flush\n    if (output.frames) {\n      return this.pendingMetadata.push(output);\n    }\n\n    if (output.track.type === 'video') {\n      this.videoTrack = output.track;\n      this.videoTags = output.tags;\n      this.pendingTracks++;\n    }\n    if (output.track.type === 'audio') {\n      this.audioTrack = output.track;\n      this.audioTags = output.tags;\n      this.pendingTracks++;\n    }\n  };\n};\n\nCoalesceStream.prototype = new Stream();\nCoalesceStream.prototype.flush = function(flushSource) {\n  var\n    id3,\n    caption,\n    i,\n    timelineStartPts,\n    event = {\n      tags: {},\n      captions: [],\n      captionStreams: {},\n      metadata: []\n    };\n\n  if (this.pendingTracks < this.numberOfTracks) {\n    if (flushSource !== 'VideoSegmentStream' &&\n        flushSource !== 'AudioSegmentStream') {\n      // Return because we haven't received a flush from a data-generating\n      // portion of the segment (meaning that we have only recieved meta-data\n      // or captions.)\n      return;\n    } else if (this.pendingTracks === 0) {\n      // In the case where we receive a flush without any data having been\n      // received we consider it an emitted track for the purposes of coalescing\n      // `done` events.\n      // We do this for the case where there is an audio and video track in the\n      // segment but no audio data. (seen in several playlists with alternate\n      // audio tracks and no audio present in the main TS segments.)\n      this.processedTracks++;\n\n      if (this.processedTracks < this.numberOfTracks) {\n        return;\n      }\n    }\n  }\n\n  this.processedTracks += this.pendingTracks;\n  this.pendingTracks = 0;\n\n  if (this.processedTracks < this.numberOfTracks) {\n    return;\n  }\n\n  if (this.videoTrack) {\n    timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n  } else if (this.audioTrack) {\n    timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n  }\n\n  event.tags.videoTags = this.videoTags;\n  event.tags.audioTags = this.audioTags;\n\n  // Translate caption PTS times into second offsets into the\n  // video timeline for the segment, and add track info\n  for (i = 0; i < this.pendingCaptions.length; i++) {\n    caption = this.pendingCaptions[i];\n    caption.startTime = caption.startPts - timelineStartPts;\n    caption.startTime /= 90e3;\n    caption.endTime = caption.endPts - timelineStartPts;\n    caption.endTime /= 90e3;\n    event.captionStreams[caption.stream] = true;\n    event.captions.push(caption);\n  }\n\n  // Translate ID3 frame PTS times into second offsets into the\n  // video timeline for the segment\n  for (i = 0; i < this.pendingMetadata.length; i++) {\n    id3 = this.pendingMetadata[i];\n    id3.cueTime = id3.pts - timelineStartPts;\n    id3.cueTime /= 90e3;\n    event.metadata.push(id3);\n  }\n  // We add this to every single emitted segment even though we only need\n  // it for the first\n  event.metadata.dispatchType = this.metadataStream.dispatchType;\n\n  // Reset stream state\n  this.videoTrack = null;\n  this.audioTrack = null;\n  this.videoTags = [];\n  this.audioTags = [];\n  this.pendingCaptions.length = 0;\n  this.pendingMetadata.length = 0;\n  this.pendingTracks = 0;\n  this.processedTracks = 0;\n\n  // Emit the final segment\n  this.trigger('data', event);\n\n  this.trigger('done');\n};\n\nmodule.exports = CoalesceStream;\n","var isObject = require('../internals/is-object');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\n\n// makes subclassing work correct for wrapped built-ins\nmodule.exports = function ($this, dummy, Wrapper) {\n  var NewTarget, NewTargetPrototype;\n  if (\n    // it can work only with native `setPrototypeOf`\n    setPrototypeOf &&\n    // we haven't completely correct pre-ES6 way for getting `new.target`, so use this\n    typeof (NewTarget = dummy.constructor) == 'function' &&\n    NewTarget !== Wrapper &&\n    isObject(NewTargetPrototype = NewTarget.prototype) &&\n    NewTargetPrototype !== Wrapper.prototype\n  ) setPrototypeOf($this, NewTargetPrototype);\n  return $this;\n};\n","/**\n * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined\n * in FIPS 180-2\n * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.\n * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet\n *\n */\n\nvar inherits = require('inherits')\nvar Sha256 = require('./sha256')\nvar Hash = require('./hash')\nvar Buffer = require('safe-buffer').Buffer\n\nvar W = new Array(64)\n\nfunction Sha224 () {\n  this.init()\n\n  this._w = W // new Array(64)\n\n  Hash.call(this, 64, 56)\n}\n\ninherits(Sha224, Sha256)\n\nSha224.prototype.init = function () {\n  this._a = 0xc1059ed8\n  this._b = 0x367cd507\n  this._c = 0x3070dd17\n  this._d = 0xf70e5939\n  this._e = 0xffc00b31\n  this._f = 0x68581511\n  this._g = 0x64f98fa7\n  this._h = 0xbefa4fa4\n\n  return this\n}\n\nSha224.prototype._hash = function () {\n  var H = Buffer.allocUnsafe(28)\n\n  H.writeInt32BE(this._a, 0)\n  H.writeInt32BE(this._b, 4)\n  H.writeInt32BE(this._c, 8)\n  H.writeInt32BE(this._d, 12)\n  H.writeInt32BE(this._e, 16)\n  H.writeInt32BE(this._f, 20)\n  H.writeInt32BE(this._g, 24)\n\n  return H\n}\n\nmodule.exports = Sha224\n",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function (Math) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var Hasher = C_lib.Hasher;\n\t    var C_algo = C.algo;\n\n\t    // Constants table\n\t    var T = [];\n\n\t    // Compute constants\n\t    (function () {\n\t        for (var i = 0; i < 64; i++) {\n\t            T[i] = (Math.abs(Math.sin(i + 1)) * 0x100000000) | 0;\n\t        }\n\t    }());\n\n\t    /**\n\t     * MD5 hash algorithm.\n\t     */\n\t    var MD5 = C_algo.MD5 = Hasher.extend({\n\t        _doReset: function () {\n\t            this._hash = new WordArray.init([\n\t                0x67452301, 0xefcdab89,\n\t                0x98badcfe, 0x10325476\n\t            ]);\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Swap endian\n\t            for (var i = 0; i < 16; i++) {\n\t                // Shortcuts\n\t                var offset_i = offset + i;\n\t                var M_offset_i = M[offset_i];\n\n\t                M[offset_i] = (\n\t                    (((M_offset_i << 8)  | (M_offset_i >>> 24)) & 0x00ff00ff) |\n\t                    (((M_offset_i << 24) | (M_offset_i >>> 8))  & 0xff00ff00)\n\t                );\n\t            }\n\n\t            // Shortcuts\n\t            var H = this._hash.words;\n\n\t            var M_offset_0  = M[offset + 0];\n\t            var M_offset_1  = M[offset + 1];\n\t            var M_offset_2  = M[offset + 2];\n\t            var M_offset_3  = M[offset + 3];\n\t            var M_offset_4  = M[offset + 4];\n\t            var M_offset_5  = M[offset + 5];\n\t            var M_offset_6  = M[offset + 6];\n\t            var M_offset_7  = M[offset + 7];\n\t            var M_offset_8  = M[offset + 8];\n\t            var M_offset_9  = M[offset + 9];\n\t            var M_offset_10 = M[offset + 10];\n\t            var M_offset_11 = M[offset + 11];\n\t            var M_offset_12 = M[offset + 12];\n\t            var M_offset_13 = M[offset + 13];\n\t            var M_offset_14 = M[offset + 14];\n\t            var M_offset_15 = M[offset + 15];\n\n\t            // Working varialbes\n\t            var a = H[0];\n\t            var b = H[1];\n\t            var c = H[2];\n\t            var d = H[3];\n\n\t            // Computation\n\t            a = FF(a, b, c, d, M_offset_0,  7,  T[0]);\n\t            d = FF(d, a, b, c, M_offset_1,  12, T[1]);\n\t            c = FF(c, d, a, b, M_offset_2,  17, T[2]);\n\t            b = FF(b, c, d, a, M_offset_3,  22, T[3]);\n\t            a = FF(a, b, c, d, M_offset_4,  7,  T[4]);\n\t            d = FF(d, a, b, c, M_offset_5,  12, T[5]);\n\t            c = FF(c, d, a, b, M_offset_6,  17, T[6]);\n\t            b = FF(b, c, d, a, M_offset_7,  22, T[7]);\n\t            a = FF(a, b, c, d, M_offset_8,  7,  T[8]);\n\t            d = FF(d, a, b, c, M_offset_9,  12, T[9]);\n\t            c = FF(c, d, a, b, M_offset_10, 17, T[10]);\n\t            b = FF(b, c, d, a, M_offset_11, 22, T[11]);\n\t            a = FF(a, b, c, d, M_offset_12, 7,  T[12]);\n\t            d = FF(d, a, b, c, M_offset_13, 12, T[13]);\n\t            c = FF(c, d, a, b, M_offset_14, 17, T[14]);\n\t            b = FF(b, c, d, a, M_offset_15, 22, T[15]);\n\n\t            a = GG(a, b, c, d, M_offset_1,  5,  T[16]);\n\t            d = GG(d, a, b, c, M_offset_6,  9,  T[17]);\n\t            c = GG(c, d, a, b, M_offset_11, 14, T[18]);\n\t            b = GG(b, c, d, a, M_offset_0,  20, T[19]);\n\t            a = GG(a, b, c, d, M_offset_5,  5,  T[20]);\n\t            d = GG(d, a, b, c, M_offset_10, 9,  T[21]);\n\t            c = GG(c, d, a, b, M_offset_15, 14, T[22]);\n\t            b = GG(b, c, d, a, M_offset_4,  20, T[23]);\n\t            a = GG(a, b, c, d, M_offset_9,  5,  T[24]);\n\t            d = GG(d, a, b, c, M_offset_14, 9,  T[25]);\n\t            c = GG(c, d, a, b, M_offset_3,  14, T[26]);\n\t            b = GG(b, c, d, a, M_offset_8,  20, T[27]);\n\t            a = GG(a, b, c, d, M_offset_13, 5,  T[28]);\n\t            d = GG(d, a, b, c, M_offset_2,  9,  T[29]);\n\t            c = GG(c, d, a, b, M_offset_7,  14, T[30]);\n\t            b = GG(b, c, d, a, M_offset_12, 20, T[31]);\n\n\t            a = HH(a, b, c, d, M_offset_5,  4,  T[32]);\n\t            d = HH(d, a, b, c, M_offset_8,  11, T[33]);\n\t            c = HH(c, d, a, b, M_offset_11, 16, T[34]);\n\t            b = HH(b, c, d, a, M_offset_14, 23, T[35]);\n\t            a = HH(a, b, c, d, M_offset_1,  4,  T[36]);\n\t            d = HH(d, a, b, c, M_offset_4,  11, T[37]);\n\t            c = HH(c, d, a, b, M_offset_7,  16, T[38]);\n\t            b = HH(b, c, d, a, M_offset_10, 23, T[39]);\n\t            a = HH(a, b, c, d, M_offset_13, 4,  T[40]);\n\t            d = HH(d, a, b, c, M_offset_0,  11, T[41]);\n\t            c = HH(c, d, a, b, M_offset_3,  16, T[42]);\n\t            b = HH(b, c, d, a, M_offset_6,  23, T[43]);\n\t            a = HH(a, b, c, d, M_offset_9,  4,  T[44]);\n\t            d = HH(d, a, b, c, M_offset_12, 11, T[45]);\n\t            c = HH(c, d, a, b, M_offset_15, 16, T[46]);\n\t            b = HH(b, c, d, a, M_offset_2,  23, T[47]);\n\n\t            a = II(a, b, c, d, M_offset_0,  6,  T[48]);\n\t            d = II(d, a, b, c, M_offset_7,  10, T[49]);\n\t            c = II(c, d, a, b, M_offset_14, 15, T[50]);\n\t            b = II(b, c, d, a, M_offset_5,  21, T[51]);\n\t            a = II(a, b, c, d, M_offset_12, 6,  T[52]);\n\t            d = II(d, a, b, c, M_offset_3,  10, T[53]);\n\t            c = II(c, d, a, b, M_offset_10, 15, T[54]);\n\t            b = II(b, c, d, a, M_offset_1,  21, T[55]);\n\t            a = II(a, b, c, d, M_offset_8,  6,  T[56]);\n\t            d = II(d, a, b, c, M_offset_15, 10, T[57]);\n\t            c = II(c, d, a, b, M_offset_6,  15, T[58]);\n\t            b = II(b, c, d, a, M_offset_13, 21, T[59]);\n\t            a = II(a, b, c, d, M_offset_4,  6,  T[60]);\n\t            d = II(d, a, b, c, M_offset_11, 10, T[61]);\n\t            c = II(c, d, a, b, M_offset_2,  15, T[62]);\n\t            b = II(b, c, d, a, M_offset_9,  21, T[63]);\n\n\t            // Intermediate hash value\n\t            H[0] = (H[0] + a) | 0;\n\t            H[1] = (H[1] + b) | 0;\n\t            H[2] = (H[2] + c) | 0;\n\t            H[3] = (H[3] + d) | 0;\n\t        },\n\n\t        _doFinalize: function () {\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\n\t            var nBitsTotal = this._nDataBytes * 8;\n\t            var nBitsLeft = data.sigBytes * 8;\n\n\t            // Add padding\n\t            dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);\n\n\t            var nBitsTotalH = Math.floor(nBitsTotal / 0x100000000);\n\t            var nBitsTotalL = nBitsTotal;\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 15] = (\n\t                (((nBitsTotalH << 8)  | (nBitsTotalH >>> 24)) & 0x00ff00ff) |\n\t                (((nBitsTotalH << 24) | (nBitsTotalH >>> 8))  & 0xff00ff00)\n\t            );\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = (\n\t                (((nBitsTotalL << 8)  | (nBitsTotalL >>> 24)) & 0x00ff00ff) |\n\t                (((nBitsTotalL << 24) | (nBitsTotalL >>> 8))  & 0xff00ff00)\n\t            );\n\n\t            data.sigBytes = (dataWords.length + 1) * 4;\n\n\t            // Hash final blocks\n\t            this._process();\n\n\t            // Shortcuts\n\t            var hash = this._hash;\n\t            var H = hash.words;\n\n\t            // Swap endian\n\t            for (var i = 0; i < 4; i++) {\n\t                // Shortcut\n\t                var H_i = H[i];\n\n\t                H[i] = (((H_i << 8)  | (H_i >>> 24)) & 0x00ff00ff) |\n\t                       (((H_i << 24) | (H_i >>> 8))  & 0xff00ff00);\n\t            }\n\n\t            // Return final computed hash\n\t            return hash;\n\t        },\n\n\t        clone: function () {\n\t            var clone = Hasher.clone.call(this);\n\t            clone._hash = this._hash.clone();\n\n\t            return clone;\n\t        }\n\t    });\n\n\t    function FF(a, b, c, d, x, s, t) {\n\t        var n = a + ((b & c) | (~b & d)) + x + t;\n\t        return ((n << s) | (n >>> (32 - s))) + b;\n\t    }\n\n\t    function GG(a, b, c, d, x, s, t) {\n\t        var n = a + ((b & d) | (c & ~d)) + x + t;\n\t        return ((n << s) | (n >>> (32 - s))) + b;\n\t    }\n\n\t    function HH(a, b, c, d, x, s, t) {\n\t        var n = a + (b ^ c ^ d) + x + t;\n\t        return ((n << s) | (n >>> (32 - s))) + b;\n\t    }\n\n\t    function II(a, b, c, d, x, s, t) {\n\t        var n = a + (c ^ (b | ~d)) + x + t;\n\t        return ((n << s) | (n >>> (32 - s))) + b;\n\t    }\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.MD5('message');\n\t     *     var hash = CryptoJS.MD5(wordArray);\n\t     */\n\t    C.MD5 = Hasher._createHelper(MD5);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacMD5(message, key);\n\t     */\n\t    C.HmacMD5 = Hasher._createHmacHelper(MD5);\n\t}(Math));\n\n\n\treturn CryptoJS.MD5;\n\n}));","// eslint-disable-next-line es/no-object-getownpropertysymbols -- safe\nexports.f = Object.getOwnPropertySymbols;\n","var path = require('../internals/path');\nvar has = require('../internals/has');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineProperty = require('../internals/object-define-property').f;\n\nmodule.exports = function (NAME) {\n  var Symbol = path.Symbol || (path.Symbol = {});\n  if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {\n    value: wrappedWellKnownSymbolModule.f(NAME)\n  });\n};\n","'use strict'\n\nfunction oldBrowser () {\n  throw new Error('secure random number generation not supported by this browser\\nuse chrome, FireFox or Internet Explorer 11')\n}\nvar safeBuffer = require('safe-buffer')\nvar randombytes = require('randombytes')\nvar Buffer = safeBuffer.Buffer\nvar kBufferMaxLength = safeBuffer.kMaxLength\nvar crypto = global.crypto || global.msCrypto\nvar kMaxUint32 = Math.pow(2, 32) - 1\nfunction assertOffset (offset, length) {\n  if (typeof offset !== 'number' || offset !== offset) { // eslint-disable-line no-self-compare\n    throw new TypeError('offset must be a number')\n  }\n\n  if (offset > kMaxUint32 || offset < 0) {\n    throw new TypeError('offset must be a uint32')\n  }\n\n  if (offset > kBufferMaxLength || offset > length) {\n    throw new RangeError('offset out of range')\n  }\n}\n\nfunction assertSize (size, offset, length) {\n  if (typeof size !== 'number' || size !== size) { // eslint-disable-line no-self-compare\n    throw new TypeError('size must be a number')\n  }\n\n  if (size > kMaxUint32 || size < 0) {\n    throw new TypeError('size must be a uint32')\n  }\n\n  if (size + offset > length || size > kBufferMaxLength) {\n    throw new RangeError('buffer too small')\n  }\n}\nif ((crypto && crypto.getRandomValues) || !process.browser) {\n  exports.randomFill = randomFill\n  exports.randomFillSync = randomFillSync\n} else {\n  exports.randomFill = oldBrowser\n  exports.randomFillSync = oldBrowser\n}\nfunction randomFill (buf, offset, size, cb) {\n  if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) {\n    throw new TypeError('\"buf\" argument must be a Buffer or Uint8Array')\n  }\n\n  if (typeof offset === 'function') {\n    cb = offset\n    offset = 0\n    size = buf.length\n  } else if (typeof size === 'function') {\n    cb = size\n    size = buf.length - offset\n  } else if (typeof cb !== 'function') {\n    throw new TypeError('\"cb\" argument must be a function')\n  }\n  assertOffset(offset, buf.length)\n  assertSize(size, offset, buf.length)\n  return actualFill(buf, offset, size, cb)\n}\n\nfunction actualFill (buf, offset, size, cb) {\n  if (process.browser) {\n    var ourBuf = buf.buffer\n    var uint = new Uint8Array(ourBuf, offset, size)\n    crypto.getRandomValues(uint)\n    if (cb) {\n      process.nextTick(function () {\n        cb(null, buf)\n      })\n      return\n    }\n    return buf\n  }\n  if (cb) {\n    randombytes(size, function (err, bytes) {\n      if (err) {\n        return cb(err)\n      }\n      bytes.copy(buf, offset)\n      cb(null, buf)\n    })\n    return\n  }\n  var bytes = randombytes(size)\n  bytes.copy(buf, offset)\n  return buf\n}\nfunction randomFillSync (buf, offset, size) {\n  if (typeof offset === 'undefined') {\n    offset = 0\n  }\n  if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) {\n    throw new TypeError('\"buf\" argument must be a Buffer or Uint8Array')\n  }\n\n  assertOffset(offset, buf.length)\n\n  if (size === undefined) size = buf.length - offset\n\n  assertSize(size, offset, buf.length)\n\n  return actualFill(buf, offset, size)\n}\n","'use strict';\n\nvar utils = exports;\n\nfunction toArray(msg, enc) {\n  if (Array.isArray(msg))\n    return msg.slice();\n  if (!msg)\n    return [];\n  var res = [];\n  if (typeof msg !== 'string') {\n    for (var i = 0; i < msg.length; i++)\n      res[i] = msg[i] | 0;\n    return res;\n  }\n  if (enc === 'hex') {\n    msg = msg.replace(/[^a-z0-9]+/ig, '');\n    if (msg.length % 2 !== 0)\n      msg = '0' + msg;\n    for (var i = 0; i < msg.length; i += 2)\n      res.push(parseInt(msg[i] + msg[i + 1], 16));\n  } else {\n    for (var i = 0; i < msg.length; i++) {\n      var c = msg.charCodeAt(i);\n      var hi = c >> 8;\n      var lo = c & 0xff;\n      if (hi)\n        res.push(hi, lo);\n      else\n        res.push(lo);\n    }\n  }\n  return res;\n}\nutils.toArray = toArray;\n\nfunction zero2(word) {\n  if (word.length === 1)\n    return '0' + word;\n  else\n    return word;\n}\nutils.zero2 = zero2;\n\nfunction toHex(msg) {\n  var res = '';\n  for (var i = 0; i < msg.length; i++)\n    res += zero2(msg[i].toString(16));\n  return res;\n}\nutils.toHex = toHex;\n\nutils.encode = function encode(arr, enc) {\n  if (enc === 'hex')\n    return toHex(arr);\n  else\n    return arr;\n};\n","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _stream = require('./stream');\n\nvar _stream2 = _interopRequireDefault(_stream);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                * @file m3u8/line-stream.js\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                */\n\n\n/**\n * A stream that buffers string input and generates a `data` event for each\n * line.\n *\n * @class LineStream\n * @extends Stream\n */\nvar LineStream = function (_Stream) {\n  _inherits(LineStream, _Stream);\n\n  function LineStream() {\n    _classCallCheck(this, LineStream);\n\n    var _this = _possibleConstructorReturn(this, (LineStream.__proto__ || Object.getPrototypeOf(LineStream)).call(this));\n\n    _this.buffer = '';\n    return _this;\n  }\n\n  /**\n   * Add new data to be parsed.\n   *\n   * @param {String} data the text to process\n   */\n\n\n  _createClass(LineStream, [{\n    key: 'push',\n    value: function push(data) {\n      var nextNewline = void 0;\n\n      this.buffer += data;\n      nextNewline = this.buffer.indexOf('\\n');\n\n      for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\\n')) {\n        this.trigger('data', this.buffer.substring(0, nextNewline));\n        this.buffer = this.buffer.substring(nextNewline + 1);\n      }\n    }\n  }]);\n\n  return LineStream;\n}(_stream2['default']);\n\nexports['default'] = LineStream;","export var top = 'top';\nexport var bottom = 'bottom';\nexport var right = 'right';\nexport var left = 'left';\nexport var auto = 'auto';\nexport var basePlacements = [top, bottom, right, left];\nexport var start = 'start';\nexport var end = 'end';\nexport var clippingParents = 'clippingParents';\nexport var viewport = 'viewport';\nexport var popper = 'popper';\nexport var reference = 'reference';\nexport var variationPlacements = /*#__PURE__*/basePlacements.reduce(function (acc, placement) {\n  return acc.concat([placement + \"-\" + start, placement + \"-\" + end]);\n}, []);\nexport var placements = /*#__PURE__*/[].concat(basePlacements, [auto]).reduce(function (acc, placement) {\n  return acc.concat([placement, placement + \"-\" + start, placement + \"-\" + end]);\n}, []); // modifiers that need to read the DOM\n\nexport var beforeRead = 'beforeRead';\nexport var read = 'read';\nexport var afterRead = 'afterRead'; // pure-logic modifiers\n\nexport var beforeMain = 'beforeMain';\nexport var main = 'main';\nexport var afterMain = 'afterMain'; // modifier with the purpose to write to the DOM (or write into a framework state)\n\nexport var beforeWrite = 'beforeWrite';\nexport var write = 'write';\nexport var afterWrite = 'afterWrite';\nexport var modifierPhases = [beforeRead, read, afterRead, beforeMain, main, afterMain, beforeWrite, write, afterWrite];","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// a passthrough stream.\n// basically just the most minimal sort of Transform stream.\n// Every written chunk gets output as-is.\n\n'use strict';\n\nmodule.exports = PassThrough;\n\nvar Transform = require('./_stream_transform');\n\n/*<replacement>*/\nvar util = Object.create(require('core-util-is'));\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nutil.inherits(PassThrough, Transform);\n\nfunction PassThrough(options) {\n  if (!(this instanceof PassThrough)) return new PassThrough(options);\n\n  Transform.call(this, options);\n}\n\nPassThrough.prototype._transform = function (chunk, encoding, cb) {\n  cb(null, chunk);\n};","// IE8- don't enum bug keys\nmodule.exports = [\n  'constructor',\n  'hasOwnProperty',\n  'isPrototypeOf',\n  'propertyIsEnumerable',\n  'toLocaleString',\n  'toString',\n  'valueOf'\n];\n","// By default assume browserify was used to bundle app. These arguments are passed to\n// the module by browserify.\nvar bundleFn = arguments[3];\nvar sources = arguments[4];\nvar cache = arguments[5];\nvar stringify = JSON.stringify;\nvar webpack = false;\n\n// webpackBootstrap\nvar webpackBootstrapFn = function(modules) {\n  // The module cache\n  var installedModules = {};\n\n  // The require function\n  function __webpack_require__(moduleId) {\n\n    // Check if module is in cache\n    if(installedModules[moduleId]) {\n      return installedModules[moduleId].exports;\n    }\n    // Create a new module (and put it into the cache)\n    var module = installedModules[moduleId] = {\n      i: moduleId,\n      l: false,\n      exports: {}\n    };\n\n    // Execute the module function\n    modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n    // Flag the module as loaded\n    module.l = true;\n\n    // Return the exports of the module\n    return module.exports;\n  }\n\n\n  // expose the modules object (__webpack_modules__)\n  __webpack_require__.m = modules;\n\n  // expose the module cache\n  __webpack_require__.c = installedModules;\n\n  // define getter function for harmony exports\n  __webpack_require__.d = function(exports, name, getter) {\n    if(!__webpack_require__.o(exports, name)) {\n      Object.defineProperty(exports, name, {\n        configurable: false,\n        enumerable: true,\n        get: getter\n      });\n    }\n  };\n\n  // getDefaultExport function for compatibility with non-harmony modules\n  __webpack_require__.n = function(module) {\n    var getter = module && module.__esModule ?\n      function getDefault() { return module['default']; } :\n      function getModuleExports() { return module; };\n\n    __webpack_require__.d(getter, 'a', getter);\n    return getter;\n  };\n\n  // Object.prototype.hasOwnProperty.call\n  __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n  // __webpack_public_path__\n  __webpack_require__.p = \"\";\n\n  // Load entry module and return exports\n  return __webpack_require__(__webpack_require__.s = entryModule);\n}\n\nif (typeof bundleFn === 'undefined') {\n  // Assume this was bundled with webpack and not browserify\n  webpack = true;\n  bundleFn = webpackBootstrapFn;\n  sources = __webpack_modules__;\n}\n\nvar bundleWithBrowserify = function(fn) {\n  // with browserify we must find the module key ourselves\n  var cacheKeys = Object.keys(cache);\n  var fnModuleKey;\n\n  for (var i = 0; i < cacheKeys.length; i++) {\n    var cacheKey = cacheKeys[i];\n    var cacheExports = cache[cacheKey].exports;\n\n    // Using babel as a transpiler to use esmodule, the export will always\n    // be an object with the default export as a property of it. To ensure\n    // the existing api and babel esmodule exports are both supported we\n    // check for both\n    if (cacheExports === fn || cacheExports && cacheExports.default === fn) {\n        fnModuleKey = cacheKey;\n        break;\n    }\n  }\n\n  // if we couldn't find one, lets make one\n  if (!fnModuleKey) {\n    fnModuleKey = Math.floor(Math.pow(16, 8) * Math.random()).toString(16);\n\n    var fnModuleCache = {};\n\n    for (var i = 0; i < cacheKeys.length; i++) {\n      var cacheKey = cacheKeys[i];\n\n      fnModuleCache[cacheKey] = cacheKey;\n    }\n\n    sources[fnModuleKey] = [\n      'function(require,module,exports){' + fn + '(self); }',\n      fnModuleCache\n    ];\n  }\n\n  var entryKey = Math.floor(Math.pow(16, 8) * Math.random()).toString(16);\n  var entryCache = {};\n\n  entryCache[fnModuleKey] = fnModuleKey;\n  sources[entryKey] = [\n    'function(require,module,exports){' +\n    // try to call default if defined to also support babel esmodule exports\n      'var f = require(' + stringify(fnModuleKey) + ');' +\n      '(f.default ? f.default : f)(self);' +\n    '}',\n    entryCache\n  ];\n\n  return '(' + bundleFn + ')({'\n        + Object.keys(sources).map(function(key) {\n            return stringify(key) + ':['\n                + sources[key][0] + ','\n                + stringify(sources[key][1]) + ']';\n        }).join(',')\n        + '},{},[' + stringify(entryKey) + '])';\n};\n\nvar bundleWithWebpack = function(fn, fnModuleId) {\n  var devMode = typeof fnModuleId === 'string';\n  var sourceStrings;\n\n  if (devMode) {\n    sourceStrings = {};\n  } else {\n    sourceStrings = [];\n  }\n\n  Object.keys(sources).forEach(function(sKey) {\n    if (!sources[sKey]) {\n      return;\n    }\n    sourceStrings[sKey] = sources[sKey].toString();\n  });\n\n  var fnModuleExports = __webpack_require__(fnModuleId);\n\n  // Using babel as a transpiler to use esmodule, the export will always\n  // be an object with the default export as a property of it. To ensure\n  // the existing api and babel esmodule exports are both supported we\n  // check for both\n  if (!(fnModuleExports && (fnModuleExports === fn || fnModuleExports.default === fn))) {\n    var fnSourceString = sourceStrings[fnModuleId];\n\n    sourceStrings[fnModuleId] = fnSourceString.substring(0, fnSourceString.length - 1) +\n                                '\\n' + fn.name + '();\\n}';\n  }\n\n  var modulesString;\n\n  if (devMode) {\n    // must escape quotes to support webpack loader options\n    fnModuleId = stringify(fnModuleId);\n    // dev mode in webpack4, modules are passed as an object\n    var mappedSourceStrings = Object.keys(sourceStrings).map(function(sKey) {\n      return stringify(sKey) + ':' + sourceStrings[sKey];\n    });\n\n    modulesString = '{' + mappedSourceStrings.join(',') + '}';\n  } else {\n    modulesString = '[' + sourceStrings.join(',') + ']';\n  }\n\n  return 'var fn = (' + bundleFn.toString().replace('entryModule', fnModuleId) + ')('\n        + modulesString\n        + ');\\n'\n        // not a function when calling a function from the current scope\n        + '(typeof fn === \"function\") && fn(self);';\n\n};\n\nmodule.exports = function webwackify(fn, fnModuleId) {\n  var src;\n\n  if (webpack) {\n    src = bundleWithWebpack(fn, fnModuleId);\n  } else {\n    src = bundleWithBrowserify(fn);\n  }\n\n  var blob = new Blob([src], { type: 'text/javascript' });\n  var URL = window.URL || window.webkitURL || window.mozURL || window.msURL;\n  var workerUrl = URL.createObjectURL(blob);\n  var worker = new Worker(workerUrl);\n  worker.objectURL = workerUrl;\n  return worker;\n};\n","var bn = require('bn.js');\nvar brorand = require('brorand');\n\nfunction MillerRabin(rand) {\n  this.rand = rand || new brorand.Rand();\n}\nmodule.exports = MillerRabin;\n\nMillerRabin.create = function create(rand) {\n  return new MillerRabin(rand);\n};\n\nMillerRabin.prototype._randbelow = function _randbelow(n) {\n  var len = n.bitLength();\n  var min_bytes = Math.ceil(len / 8);\n\n  // Generage random bytes until a number less than n is found.\n  // This ensures that 0..n-1 have an equal probability of being selected.\n  do\n    var a = new bn(this.rand.generate(min_bytes));\n  while (a.cmp(n) >= 0);\n\n  return a;\n};\n\nMillerRabin.prototype._randrange = function _randrange(start, stop) {\n  // Generate a random number greater than or equal to start and less than stop.\n  var size = stop.sub(start);\n  return start.add(this._randbelow(size));\n};\n\nMillerRabin.prototype.test = function test(n, k, cb) {\n  var len = n.bitLength();\n  var red = bn.mont(n);\n  var rone = new bn(1).toRed(red);\n\n  if (!k)\n    k = Math.max(1, (len / 48) | 0);\n\n  // Find d and s, (n - 1) = (2 ^ s) * d;\n  var n1 = n.subn(1);\n  for (var s = 0; !n1.testn(s); s++) {}\n  var d = n.shrn(s);\n\n  var rn1 = n1.toRed(red);\n\n  var prime = true;\n  for (; k > 0; k--) {\n    var a = this._randrange(new bn(2), n1);\n    if (cb)\n      cb(a);\n\n    var x = a.toRed(red).redPow(d);\n    if (x.cmp(rone) === 0 || x.cmp(rn1) === 0)\n      continue;\n\n    for (var i = 1; i < s; i++) {\n      x = x.redSqr();\n\n      if (x.cmp(rone) === 0)\n        return false;\n      if (x.cmp(rn1) === 0)\n        break;\n    }\n\n    if (i === s)\n      return false;\n  }\n\n  return prime;\n};\n\nMillerRabin.prototype.getDivisor = function getDivisor(n, k) {\n  var len = n.bitLength();\n  var red = bn.mont(n);\n  var rone = new bn(1).toRed(red);\n\n  if (!k)\n    k = Math.max(1, (len / 48) | 0);\n\n  // Find d and s, (n - 1) = (2 ^ s) * d;\n  var n1 = n.subn(1);\n  for (var s = 0; !n1.testn(s); s++) {}\n  var d = n.shrn(s);\n\n  var rn1 = n1.toRed(red);\n\n  for (; k > 0; k--) {\n    var a = this._randrange(new bn(2), n1);\n\n    var g = n.gcd(a);\n    if (g.cmpn(1) !== 0)\n      return g;\n\n    var x = a.toRed(red).redPow(d);\n    if (x.cmp(rone) === 0 || x.cmp(rn1) === 0)\n      continue;\n\n    for (var i = 1; i < s; i++) {\n      x = x.redSqr();\n\n      if (x.cmp(rone) === 0)\n        return x.fromRed().subn(1).gcd(n);\n      if (x.cmp(rn1) === 0)\n        break;\n    }\n\n    if (i === s) {\n      x = x.redSqr();\n      return x.fromRed().subn(1).gcd(n);\n    }\n  }\n\n  return false;\n};\n","import { EMPTY_OBJ, isArray, isMap, isIntegerKey, isSymbol, extend, hasOwn, isObject, hasChanged, makeMap, capitalize, toRawType, def, isFunction, NOOP } from '@vue/shared';\n\nconst targetMap = new WeakMap();\r\nconst effectStack = [];\r\nlet activeEffect;\r\nconst ITERATE_KEY = Symbol((process.env.NODE_ENV !== 'production') ? 'iterate' : '');\r\nconst MAP_KEY_ITERATE_KEY = Symbol((process.env.NODE_ENV !== 'production') ? 'Map key iterate' : '');\r\nfunction isEffect(fn) {\r\n    return fn && fn._isEffect === true;\r\n}\r\nfunction effect(fn, options = EMPTY_OBJ) {\r\n    if (isEffect(fn)) {\r\n        fn = fn.raw;\r\n    }\r\n    const effect = createReactiveEffect(fn, options);\r\n    if (!options.lazy) {\r\n        effect();\r\n    }\r\n    return effect;\r\n}\r\nfunction stop(effect) {\r\n    if (effect.active) {\r\n        cleanup(effect);\r\n        if (effect.options.onStop) {\r\n            effect.options.onStop();\r\n        }\r\n        effect.active = false;\r\n    }\r\n}\r\nlet uid = 0;\r\nfunction createReactiveEffect(fn, options) {\r\n    const effect = function reactiveEffect() {\r\n        if (!effect.active) {\r\n            return options.scheduler ? undefined : fn();\r\n        }\r\n        if (!effectStack.includes(effect)) {\r\n            cleanup(effect);\r\n            try {\r\n                enableTracking();\r\n                effectStack.push(effect);\r\n                activeEffect = effect;\r\n                return fn();\r\n            }\r\n            finally {\r\n                effectStack.pop();\r\n                resetTracking();\r\n                activeEffect = effectStack[effectStack.length - 1];\r\n            }\r\n        }\r\n    };\r\n    effect.id = uid++;\r\n    effect.allowRecurse = !!options.allowRecurse;\r\n    effect._isEffect = true;\r\n    effect.active = true;\r\n    effect.raw = fn;\r\n    effect.deps = [];\r\n    effect.options = options;\r\n    return effect;\r\n}\r\nfunction cleanup(effect) {\r\n    const { deps } = effect;\r\n    if (deps.length) {\r\n        for (let i = 0; i < deps.length; i++) {\r\n            deps[i].delete(effect);\r\n        }\r\n        deps.length = 0;\r\n    }\r\n}\r\nlet shouldTrack = true;\r\nconst trackStack = [];\r\nfunction pauseTracking() {\r\n    trackStack.push(shouldTrack);\r\n    shouldTrack = false;\r\n}\r\nfunction enableTracking() {\r\n    trackStack.push(shouldTrack);\r\n    shouldTrack = true;\r\n}\r\nfunction resetTracking() {\r\n    const last = trackStack.pop();\r\n    shouldTrack = last === undefined ? true : last;\r\n}\r\nfunction track(target, type, key) {\r\n    if (!shouldTrack || activeEffect === undefined) {\r\n        return;\r\n    }\r\n    let depsMap = targetMap.get(target);\r\n    if (!depsMap) {\r\n        targetMap.set(target, (depsMap = new Map()));\r\n    }\r\n    let dep = depsMap.get(key);\r\n    if (!dep) {\r\n        depsMap.set(key, (dep = new Set()));\r\n    }\r\n    if (!dep.has(activeEffect)) {\r\n        dep.add(activeEffect);\r\n        activeEffect.deps.push(dep);\r\n        if ((process.env.NODE_ENV !== 'production') && activeEffect.options.onTrack) {\r\n            activeEffect.options.onTrack({\r\n                effect: activeEffect,\r\n                target,\r\n                type,\r\n                key\r\n            });\r\n        }\r\n    }\r\n}\r\nfunction trigger(target, type, key, newValue, oldValue, oldTarget) {\r\n    const depsMap = targetMap.get(target);\r\n    if (!depsMap) {\r\n        // never been tracked\r\n        return;\r\n    }\r\n    const effects = new Set();\r\n    const add = (effectsToAdd) => {\r\n        if (effectsToAdd) {\r\n            effectsToAdd.forEach(effect => {\r\n                if (effect !== activeEffect || effect.allowRecurse) {\r\n                    effects.add(effect);\r\n                }\r\n            });\r\n        }\r\n    };\r\n    if (type === \"clear\" /* CLEAR */) {\r\n        // collection being cleared\r\n        // trigger all effects for target\r\n        depsMap.forEach(add);\r\n    }\r\n    else if (key === 'length' && isArray(target)) {\r\n        depsMap.forEach((dep, key) => {\r\n            if (key === 'length' || key >= newValue) {\r\n                add(dep);\r\n            }\r\n        });\r\n    }\r\n    else {\r\n        // schedule runs for SET | ADD | DELETE\r\n        if (key !== void 0) {\r\n            add(depsMap.get(key));\r\n        }\r\n        // also run for iteration key on ADD | DELETE | Map.SET\r\n        switch (type) {\r\n            case \"add\" /* ADD */:\r\n                if (!isArray(target)) {\r\n                    add(depsMap.get(ITERATE_KEY));\r\n                    if (isMap(target)) {\r\n                        add(depsMap.get(MAP_KEY_ITERATE_KEY));\r\n                    }\r\n                }\r\n                else if (isIntegerKey(key)) {\r\n                    // new index added to array -> length changes\r\n                    add(depsMap.get('length'));\r\n                }\r\n                break;\r\n            case \"delete\" /* DELETE */:\r\n                if (!isArray(target)) {\r\n                    add(depsMap.get(ITERATE_KEY));\r\n                    if (isMap(target)) {\r\n                        add(depsMap.get(MAP_KEY_ITERATE_KEY));\r\n                    }\r\n                }\r\n                break;\r\n            case \"set\" /* SET */:\r\n                if (isMap(target)) {\r\n                    add(depsMap.get(ITERATE_KEY));\r\n                }\r\n                break;\r\n        }\r\n    }\r\n    const run = (effect) => {\r\n        if ((process.env.NODE_ENV !== 'production') && effect.options.onTrigger) {\r\n            effect.options.onTrigger({\r\n                effect,\r\n                target,\r\n                key,\r\n                type,\r\n                newValue,\r\n                oldValue,\r\n                oldTarget\r\n            });\r\n        }\r\n        if (effect.options.scheduler) {\r\n            effect.options.scheduler(effect);\r\n        }\r\n        else {\r\n            effect();\r\n        }\r\n    };\r\n    effects.forEach(run);\r\n}\n\nconst isNonTrackableKeys = /*#__PURE__*/ makeMap(`__proto__,__v_isRef,__isVue`);\r\nconst builtInSymbols = new Set(Object.getOwnPropertyNames(Symbol)\r\n    .map(key => Symbol[key])\r\n    .filter(isSymbol));\r\nconst get = /*#__PURE__*/ createGetter();\r\nconst shallowGet = /*#__PURE__*/ createGetter(false, true);\r\nconst readonlyGet = /*#__PURE__*/ createGetter(true);\r\nconst shallowReadonlyGet = /*#__PURE__*/ createGetter(true, true);\r\nconst arrayInstrumentations = {};\r\n['includes', 'indexOf', 'lastIndexOf'].forEach(key => {\r\n    const method = Array.prototype[key];\r\n    arrayInstrumentations[key] = function (...args) {\r\n        const arr = toRaw(this);\r\n        for (let i = 0, l = this.length; i < l; i++) {\r\n            track(arr, \"get\" /* GET */, i + '');\r\n        }\r\n        // we run the method using the original args first (which may be reactive)\r\n        const res = method.apply(arr, args);\r\n        if (res === -1 || res === false) {\r\n            // if that didn't work, run it again using raw values.\r\n            return method.apply(arr, args.map(toRaw));\r\n        }\r\n        else {\r\n            return res;\r\n        }\r\n    };\r\n});\r\n['push', 'pop', 'shift', 'unshift', 'splice'].forEach(key => {\r\n    const method = Array.prototype[key];\r\n    arrayInstrumentations[key] = function (...args) {\r\n        pauseTracking();\r\n        const res = method.apply(this, args);\r\n        resetTracking();\r\n        return res;\r\n    };\r\n});\r\nfunction createGetter(isReadonly = false, shallow = false) {\r\n    return function get(target, key, receiver) {\r\n        if (key === \"__v_isReactive\" /* IS_REACTIVE */) {\r\n            return !isReadonly;\r\n        }\r\n        else if (key === \"__v_isReadonly\" /* IS_READONLY */) {\r\n            return isReadonly;\r\n        }\r\n        else if (key === \"__v_raw\" /* RAW */ &&\r\n            receiver ===\r\n                (isReadonly\r\n                    ? shallow\r\n                        ? shallowReadonlyMap\r\n                        : readonlyMap\r\n                    : shallow\r\n                        ? shallowReactiveMap\r\n                        : reactiveMap).get(target)) {\r\n            return target;\r\n        }\r\n        const targetIsArray = isArray(target);\r\n        if (!isReadonly && targetIsArray && hasOwn(arrayInstrumentations, key)) {\r\n            return Reflect.get(arrayInstrumentations, key, receiver);\r\n        }\r\n        const res = Reflect.get(target, key, receiver);\r\n        if (isSymbol(key)\r\n            ? builtInSymbols.has(key)\r\n            : isNonTrackableKeys(key)) {\r\n            return res;\r\n        }\r\n        if (!isReadonly) {\r\n            track(target, \"get\" /* GET */, key);\r\n        }\r\n        if (shallow) {\r\n            return res;\r\n        }\r\n        if (isRef(res)) {\r\n            // ref unwrapping - does not apply for Array + integer key.\r\n            const shouldUnwrap = !targetIsArray || !isIntegerKey(key);\r\n            return shouldUnwrap ? res.value : res;\r\n        }\r\n        if (isObject(res)) {\r\n            // Convert returned value into a proxy as well. we do the isObject check\r\n            // here to avoid invalid value warning. Also need to lazy access readonly\r\n            // and reactive here to avoid circular dependency.\r\n            return isReadonly ? readonly(res) : reactive(res);\r\n        }\r\n        return res;\r\n    };\r\n}\r\nconst set = /*#__PURE__*/ createSetter();\r\nconst shallowSet = /*#__PURE__*/ createSetter(true);\r\nfunction createSetter(shallow = false) {\r\n    return function set(target, key, value, receiver) {\r\n        let oldValue = target[key];\r\n        if (!shallow) {\r\n            value = toRaw(value);\r\n            oldValue = toRaw(oldValue);\r\n            if (!isArray(target) && isRef(oldValue) && !isRef(value)) {\r\n                oldValue.value = value;\r\n                return true;\r\n            }\r\n        }\r\n        const hadKey = isArray(target) && isIntegerKey(key)\r\n            ? Number(key) < target.length\r\n            : hasOwn(target, key);\r\n        const result = Reflect.set(target, key, value, receiver);\r\n        // don't trigger if target is something up in the prototype chain of original\r\n        if (target === toRaw(receiver)) {\r\n            if (!hadKey) {\r\n                trigger(target, \"add\" /* ADD */, key, value);\r\n            }\r\n            else if (hasChanged(value, oldValue)) {\r\n                trigger(target, \"set\" /* SET */, key, value, oldValue);\r\n            }\r\n        }\r\n        return result;\r\n    };\r\n}\r\nfunction deleteProperty(target, key) {\r\n    const hadKey = hasOwn(target, key);\r\n    const oldValue = target[key];\r\n    const result = Reflect.deleteProperty(target, key);\r\n    if (result && hadKey) {\r\n        trigger(target, \"delete\" /* DELETE */, key, undefined, oldValue);\r\n    }\r\n    return result;\r\n}\r\nfunction has(target, key) {\r\n    const result = Reflect.has(target, key);\r\n    if (!isSymbol(key) || !builtInSymbols.has(key)) {\r\n        track(target, \"has\" /* HAS */, key);\r\n    }\r\n    return result;\r\n}\r\nfunction ownKeys(target) {\r\n    track(target, \"iterate\" /* ITERATE */, isArray(target) ? 'length' : ITERATE_KEY);\r\n    return Reflect.ownKeys(target);\r\n}\r\nconst mutableHandlers = {\r\n    get,\r\n    set,\r\n    deleteProperty,\r\n    has,\r\n    ownKeys\r\n};\r\nconst readonlyHandlers = {\r\n    get: readonlyGet,\r\n    set(target, key) {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            console.warn(`Set operation on key \"${String(key)}\" failed: target is readonly.`, target);\r\n        }\r\n        return true;\r\n    },\r\n    deleteProperty(target, key) {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            console.warn(`Delete operation on key \"${String(key)}\" failed: target is readonly.`, target);\r\n        }\r\n        return true;\r\n    }\r\n};\r\nconst shallowReactiveHandlers = extend({}, mutableHandlers, {\r\n    get: shallowGet,\r\n    set: shallowSet\r\n});\r\n// Props handlers are special in the sense that it should not unwrap top-level\r\n// refs (in order to allow refs to be explicitly passed down), but should\r\n// retain the reactivity of the normal readonly object.\r\nconst shallowReadonlyHandlers = extend({}, readonlyHandlers, {\r\n    get: shallowReadonlyGet\r\n});\n\nconst toReactive = (value) => isObject(value) ? reactive(value) : value;\r\nconst toReadonly = (value) => isObject(value) ? readonly(value) : value;\r\nconst toShallow = (value) => value;\r\nconst getProto = (v) => Reflect.getPrototypeOf(v);\r\nfunction get$1(target, key, isReadonly = false, isShallow = false) {\r\n    // #1772: readonly(reactive(Map)) should return readonly + reactive version\r\n    // of the value\r\n    target = target[\"__v_raw\" /* RAW */];\r\n    const rawTarget = toRaw(target);\r\n    const rawKey = toRaw(key);\r\n    if (key !== rawKey) {\r\n        !isReadonly && track(rawTarget, \"get\" /* GET */, key);\r\n    }\r\n    !isReadonly && track(rawTarget, \"get\" /* GET */, rawKey);\r\n    const { has } = getProto(rawTarget);\r\n    const wrap = isShallow ? toShallow : isReadonly ? toReadonly : toReactive;\r\n    if (has.call(rawTarget, key)) {\r\n        return wrap(target.get(key));\r\n    }\r\n    else if (has.call(rawTarget, rawKey)) {\r\n        return wrap(target.get(rawKey));\r\n    }\r\n}\r\nfunction has$1(key, isReadonly = false) {\r\n    const target = this[\"__v_raw\" /* RAW */];\r\n    const rawTarget = toRaw(target);\r\n    const rawKey = toRaw(key);\r\n    if (key !== rawKey) {\r\n        !isReadonly && track(rawTarget, \"has\" /* HAS */, key);\r\n    }\r\n    !isReadonly && track(rawTarget, \"has\" /* HAS */, rawKey);\r\n    return key === rawKey\r\n        ? target.has(key)\r\n        : target.has(key) || target.has(rawKey);\r\n}\r\nfunction size(target, isReadonly = false) {\r\n    target = target[\"__v_raw\" /* RAW */];\r\n    !isReadonly && track(toRaw(target), \"iterate\" /* ITERATE */, ITERATE_KEY);\r\n    return Reflect.get(target, 'size', target);\r\n}\r\nfunction add(value) {\r\n    value = toRaw(value);\r\n    const target = toRaw(this);\r\n    const proto = getProto(target);\r\n    const hadKey = proto.has.call(target, value);\r\n    if (!hadKey) {\r\n        target.add(value);\r\n        trigger(target, \"add\" /* ADD */, value, value);\r\n    }\r\n    return this;\r\n}\r\nfunction set$1(key, value) {\r\n    value = toRaw(value);\r\n    const target = toRaw(this);\r\n    const { has, get } = getProto(target);\r\n    let hadKey = has.call(target, key);\r\n    if (!hadKey) {\r\n        key = toRaw(key);\r\n        hadKey = has.call(target, key);\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        checkIdentityKeys(target, has, key);\r\n    }\r\n    const oldValue = get.call(target, key);\r\n    target.set(key, value);\r\n    if (!hadKey) {\r\n        trigger(target, \"add\" /* ADD */, key, value);\r\n    }\r\n    else if (hasChanged(value, oldValue)) {\r\n        trigger(target, \"set\" /* SET */, key, value, oldValue);\r\n    }\r\n    return this;\r\n}\r\nfunction deleteEntry(key) {\r\n    const target = toRaw(this);\r\n    const { has, get } = getProto(target);\r\n    let hadKey = has.call(target, key);\r\n    if (!hadKey) {\r\n        key = toRaw(key);\r\n        hadKey = has.call(target, key);\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        checkIdentityKeys(target, has, key);\r\n    }\r\n    const oldValue = get ? get.call(target, key) : undefined;\r\n    // forward the operation before queueing reactions\r\n    const result = target.delete(key);\r\n    if (hadKey) {\r\n        trigger(target, \"delete\" /* DELETE */, key, undefined, oldValue);\r\n    }\r\n    return result;\r\n}\r\nfunction clear() {\r\n    const target = toRaw(this);\r\n    const hadItems = target.size !== 0;\r\n    const oldTarget = (process.env.NODE_ENV !== 'production')\r\n        ? isMap(target)\r\n            ? new Map(target)\r\n            : new Set(target)\r\n        : undefined;\r\n    // forward the operation before queueing reactions\r\n    const result = target.clear();\r\n    if (hadItems) {\r\n        trigger(target, \"clear\" /* CLEAR */, undefined, undefined, oldTarget);\r\n    }\r\n    return result;\r\n}\r\nfunction createForEach(isReadonly, isShallow) {\r\n    return function forEach(callback, thisArg) {\r\n        const observed = this;\r\n        const target = observed[\"__v_raw\" /* RAW */];\r\n        const rawTarget = toRaw(target);\r\n        const wrap = isShallow ? toShallow : isReadonly ? toReadonly : toReactive;\r\n        !isReadonly && track(rawTarget, \"iterate\" /* ITERATE */, ITERATE_KEY);\r\n        return target.forEach((value, key) => {\r\n            // important: make sure the callback is\r\n            // 1. invoked with the reactive map as `this` and 3rd arg\r\n            // 2. the value received should be a corresponding reactive/readonly.\r\n            return callback.call(thisArg, wrap(value), wrap(key), observed);\r\n        });\r\n    };\r\n}\r\nfunction createIterableMethod(method, isReadonly, isShallow) {\r\n    return function (...args) {\r\n        const target = this[\"__v_raw\" /* RAW */];\r\n        const rawTarget = toRaw(target);\r\n        const targetIsMap = isMap(rawTarget);\r\n        const isPair = method === 'entries' || (method === Symbol.iterator && targetIsMap);\r\n        const isKeyOnly = method === 'keys' && targetIsMap;\r\n        const innerIterator = target[method](...args);\r\n        const wrap = isShallow ? toShallow : isReadonly ? toReadonly : toReactive;\r\n        !isReadonly &&\r\n            track(rawTarget, \"iterate\" /* ITERATE */, isKeyOnly ? MAP_KEY_ITERATE_KEY : ITERATE_KEY);\r\n        // return a wrapped iterator which returns observed versions of the\r\n        // values emitted from the real iterator\r\n        return {\r\n            // iterator protocol\r\n            next() {\r\n                const { value, done } = innerIterator.next();\r\n                return done\r\n                    ? { value, done }\r\n                    : {\r\n                        value: isPair ? [wrap(value[0]), wrap(value[1])] : wrap(value),\r\n                        done\r\n                    };\r\n            },\r\n            // iterable protocol\r\n            [Symbol.iterator]() {\r\n                return this;\r\n            }\r\n        };\r\n    };\r\n}\r\nfunction createReadonlyMethod(type) {\r\n    return function (...args) {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            const key = args[0] ? `on key \"${args[0]}\" ` : ``;\r\n            console.warn(`${capitalize(type)} operation ${key}failed: target is readonly.`, toRaw(this));\r\n        }\r\n        return type === \"delete\" /* DELETE */ ? false : this;\r\n    };\r\n}\r\nconst mutableInstrumentations = {\r\n    get(key) {\r\n        return get$1(this, key);\r\n    },\r\n    get size() {\r\n        return size(this);\r\n    },\r\n    has: has$1,\r\n    add,\r\n    set: set$1,\r\n    delete: deleteEntry,\r\n    clear,\r\n    forEach: createForEach(false, false)\r\n};\r\nconst shallowInstrumentations = {\r\n    get(key) {\r\n        return get$1(this, key, false, true);\r\n    },\r\n    get size() {\r\n        return size(this);\r\n    },\r\n    has: has$1,\r\n    add,\r\n    set: set$1,\r\n    delete: deleteEntry,\r\n    clear,\r\n    forEach: createForEach(false, true)\r\n};\r\nconst readonlyInstrumentations = {\r\n    get(key) {\r\n        return get$1(this, key, true);\r\n    },\r\n    get size() {\r\n        return size(this, true);\r\n    },\r\n    has(key) {\r\n        return has$1.call(this, key, true);\r\n    },\r\n    add: createReadonlyMethod(\"add\" /* ADD */),\r\n    set: createReadonlyMethod(\"set\" /* SET */),\r\n    delete: createReadonlyMethod(\"delete\" /* DELETE */),\r\n    clear: createReadonlyMethod(\"clear\" /* CLEAR */),\r\n    forEach: createForEach(true, false)\r\n};\r\nconst shallowReadonlyInstrumentations = {\r\n    get(key) {\r\n        return get$1(this, key, true, true);\r\n    },\r\n    get size() {\r\n        return size(this, true);\r\n    },\r\n    has(key) {\r\n        return has$1.call(this, key, true);\r\n    },\r\n    add: createReadonlyMethod(\"add\" /* ADD */),\r\n    set: createReadonlyMethod(\"set\" /* SET */),\r\n    delete: createReadonlyMethod(\"delete\" /* DELETE */),\r\n    clear: createReadonlyMethod(\"clear\" /* CLEAR */),\r\n    forEach: createForEach(true, true)\r\n};\r\nconst iteratorMethods = ['keys', 'values', 'entries', Symbol.iterator];\r\niteratorMethods.forEach(method => {\r\n    mutableInstrumentations[method] = createIterableMethod(method, false, false);\r\n    readonlyInstrumentations[method] = createIterableMethod(method, true, false);\r\n    shallowInstrumentations[method] = createIterableMethod(method, false, true);\r\n    shallowReadonlyInstrumentations[method] = createIterableMethod(method, true, true);\r\n});\r\nfunction createInstrumentationGetter(isReadonly, shallow) {\r\n    const instrumentations = shallow\r\n        ? isReadonly\r\n            ? shallowReadonlyInstrumentations\r\n            : shallowInstrumentations\r\n        : isReadonly\r\n            ? readonlyInstrumentations\r\n            : mutableInstrumentations;\r\n    return (target, key, receiver) => {\r\n        if (key === \"__v_isReactive\" /* IS_REACTIVE */) {\r\n            return !isReadonly;\r\n        }\r\n        else if (key === \"__v_isReadonly\" /* IS_READONLY */) {\r\n            return isReadonly;\r\n        }\r\n        else if (key === \"__v_raw\" /* RAW */) {\r\n            return target;\r\n        }\r\n        return Reflect.get(hasOwn(instrumentations, key) && key in target\r\n            ? instrumentations\r\n            : target, key, receiver);\r\n    };\r\n}\r\nconst mutableCollectionHandlers = {\r\n    get: createInstrumentationGetter(false, false)\r\n};\r\nconst shallowCollectionHandlers = {\r\n    get: createInstrumentationGetter(false, true)\r\n};\r\nconst readonlyCollectionHandlers = {\r\n    get: createInstrumentationGetter(true, false)\r\n};\r\nconst shallowReadonlyCollectionHandlers = {\r\n    get: createInstrumentationGetter(true, true)\r\n};\r\nfunction checkIdentityKeys(target, has, key) {\r\n    const rawKey = toRaw(key);\r\n    if (rawKey !== key && has.call(target, rawKey)) {\r\n        const type = toRawType(target);\r\n        console.warn(`Reactive ${type} contains both the raw and reactive ` +\r\n            `versions of the same object${type === `Map` ? ` as keys` : ``}, ` +\r\n            `which can lead to inconsistencies. ` +\r\n            `Avoid differentiating between the raw and reactive versions ` +\r\n            `of an object and only use the reactive version if possible.`);\r\n    }\r\n}\n\nconst reactiveMap = new WeakMap();\r\nconst shallowReactiveMap = new WeakMap();\r\nconst readonlyMap = new WeakMap();\r\nconst shallowReadonlyMap = new WeakMap();\r\nfunction targetTypeMap(rawType) {\r\n    switch (rawType) {\r\n        case 'Object':\r\n        case 'Array':\r\n            return 1 /* COMMON */;\r\n        case 'Map':\r\n        case 'Set':\r\n        case 'WeakMap':\r\n        case 'WeakSet':\r\n            return 2 /* COLLECTION */;\r\n        default:\r\n            return 0 /* INVALID */;\r\n    }\r\n}\r\nfunction getTargetType(value) {\r\n    return value[\"__v_skip\" /* SKIP */] || !Object.isExtensible(value)\r\n        ? 0 /* INVALID */\r\n        : targetTypeMap(toRawType(value));\r\n}\r\nfunction reactive(target) {\r\n    // if trying to observe a readonly proxy, return the readonly version.\r\n    if (target && target[\"__v_isReadonly\" /* IS_READONLY */]) {\r\n        return target;\r\n    }\r\n    return createReactiveObject(target, false, mutableHandlers, mutableCollectionHandlers, reactiveMap);\r\n}\r\n/**\r\n * Return a shallowly-reactive copy of the original object, where only the root\r\n * level properties are reactive. It also does not auto-unwrap refs (even at the\r\n * root level).\r\n */\r\nfunction shallowReactive(target) {\r\n    return createReactiveObject(target, false, shallowReactiveHandlers, shallowCollectionHandlers, shallowReactiveMap);\r\n}\r\n/**\r\n * Creates a readonly copy of the original object. Note the returned copy is not\r\n * made reactive, but `readonly` can be called on an already reactive object.\r\n */\r\nfunction readonly(target) {\r\n    return createReactiveObject(target, true, readonlyHandlers, readonlyCollectionHandlers, readonlyMap);\r\n}\r\n/**\r\n * Returns a reactive-copy of the original object, where only the root level\r\n * properties are readonly, and does NOT unwrap refs nor recursively convert\r\n * returned properties.\r\n * This is used for creating the props proxy object for stateful components.\r\n */\r\nfunction shallowReadonly(target) {\r\n    return createReactiveObject(target, true, shallowReadonlyHandlers, shallowReadonlyCollectionHandlers, shallowReadonlyMap);\r\n}\r\nfunction createReactiveObject(target, isReadonly, baseHandlers, collectionHandlers, proxyMap) {\r\n    if (!isObject(target)) {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            console.warn(`value cannot be made reactive: ${String(target)}`);\r\n        }\r\n        return target;\r\n    }\r\n    // target is already a Proxy, return it.\r\n    // exception: calling readonly() on a reactive object\r\n    if (target[\"__v_raw\" /* RAW */] &&\r\n        !(isReadonly && target[\"__v_isReactive\" /* IS_REACTIVE */])) {\r\n        return target;\r\n    }\r\n    // target already has corresponding Proxy\r\n    const existingProxy = proxyMap.get(target);\r\n    if (existingProxy) {\r\n        return existingProxy;\r\n    }\r\n    // only a whitelist of value types can be observed.\r\n    const targetType = getTargetType(target);\r\n    if (targetType === 0 /* INVALID */) {\r\n        return target;\r\n    }\r\n    const proxy = new Proxy(target, targetType === 2 /* COLLECTION */ ? collectionHandlers : baseHandlers);\r\n    proxyMap.set(target, proxy);\r\n    return proxy;\r\n}\r\nfunction isReactive(value) {\r\n    if (isReadonly(value)) {\r\n        return isReactive(value[\"__v_raw\" /* RAW */]);\r\n    }\r\n    return !!(value && value[\"__v_isReactive\" /* IS_REACTIVE */]);\r\n}\r\nfunction isReadonly(value) {\r\n    return !!(value && value[\"__v_isReadonly\" /* IS_READONLY */]);\r\n}\r\nfunction isProxy(value) {\r\n    return isReactive(value) || isReadonly(value);\r\n}\r\nfunction toRaw(observed) {\r\n    return ((observed && toRaw(observed[\"__v_raw\" /* RAW */])) || observed);\r\n}\r\nfunction markRaw(value) {\r\n    def(value, \"__v_skip\" /* SKIP */, true);\r\n    return value;\r\n}\n\nconst convert = (val) => isObject(val) ? reactive(val) : val;\r\nfunction isRef(r) {\r\n    return Boolean(r && r.__v_isRef === true);\r\n}\r\nfunction ref(value) {\r\n    return createRef(value);\r\n}\r\nfunction shallowRef(value) {\r\n    return createRef(value, true);\r\n}\r\nclass RefImpl {\r\n    constructor(_rawValue, _shallow = false) {\r\n        this._rawValue = _rawValue;\r\n        this._shallow = _shallow;\r\n        this.__v_isRef = true;\r\n        this._value = _shallow ? _rawValue : convert(_rawValue);\r\n    }\r\n    get value() {\r\n        track(toRaw(this), \"get\" /* GET */, 'value');\r\n        return this._value;\r\n    }\r\n    set value(newVal) {\r\n        if (hasChanged(toRaw(newVal), this._rawValue)) {\r\n            this._rawValue = newVal;\r\n            this._value = this._shallow ? newVal : convert(newVal);\r\n            trigger(toRaw(this), \"set\" /* SET */, 'value', newVal);\r\n        }\r\n    }\r\n}\r\nfunction createRef(rawValue, shallow = false) {\r\n    if (isRef(rawValue)) {\r\n        return rawValue;\r\n    }\r\n    return new RefImpl(rawValue, shallow);\r\n}\r\nfunction triggerRef(ref) {\r\n    trigger(toRaw(ref), \"set\" /* SET */, 'value', (process.env.NODE_ENV !== 'production') ? ref.value : void 0);\r\n}\r\nfunction unref(ref) {\r\n    return isRef(ref) ? ref.value : ref;\r\n}\r\nconst shallowUnwrapHandlers = {\r\n    get: (target, key, receiver) => unref(Reflect.get(target, key, receiver)),\r\n    set: (target, key, value, receiver) => {\r\n        const oldValue = target[key];\r\n        if (isRef(oldValue) && !isRef(value)) {\r\n            oldValue.value = value;\r\n            return true;\r\n        }\r\n        else {\r\n            return Reflect.set(target, key, value, receiver);\r\n        }\r\n    }\r\n};\r\nfunction proxyRefs(objectWithRefs) {\r\n    return isReactive(objectWithRefs)\r\n        ? objectWithRefs\r\n        : new Proxy(objectWithRefs, shallowUnwrapHandlers);\r\n}\r\nclass CustomRefImpl {\r\n    constructor(factory) {\r\n        this.__v_isRef = true;\r\n        const { get, set } = factory(() => track(this, \"get\" /* GET */, 'value'), () => trigger(this, \"set\" /* SET */, 'value'));\r\n        this._get = get;\r\n        this._set = set;\r\n    }\r\n    get value() {\r\n        return this._get();\r\n    }\r\n    set value(newVal) {\r\n        this._set(newVal);\r\n    }\r\n}\r\nfunction customRef(factory) {\r\n    return new CustomRefImpl(factory);\r\n}\r\nfunction toRefs(object) {\r\n    if ((process.env.NODE_ENV !== 'production') && !isProxy(object)) {\r\n        console.warn(`toRefs() expects a reactive object but received a plain one.`);\r\n    }\r\n    const ret = isArray(object) ? new Array(object.length) : {};\r\n    for (const key in object) {\r\n        ret[key] = toRef(object, key);\r\n    }\r\n    return ret;\r\n}\r\nclass ObjectRefImpl {\r\n    constructor(_object, _key) {\r\n        this._object = _object;\r\n        this._key = _key;\r\n        this.__v_isRef = true;\r\n    }\r\n    get value() {\r\n        return this._object[this._key];\r\n    }\r\n    set value(newVal) {\r\n        this._object[this._key] = newVal;\r\n    }\r\n}\r\nfunction toRef(object, key) {\r\n    return isRef(object[key])\r\n        ? object[key]\r\n        : new ObjectRefImpl(object, key);\r\n}\n\nclass ComputedRefImpl {\r\n    constructor(getter, _setter, isReadonly) {\r\n        this._setter = _setter;\r\n        this._dirty = true;\r\n        this.__v_isRef = true;\r\n        this.effect = effect(getter, {\r\n            lazy: true,\r\n            scheduler: () => {\r\n                if (!this._dirty) {\r\n                    this._dirty = true;\r\n                    trigger(toRaw(this), \"set\" /* SET */, 'value');\r\n                }\r\n            }\r\n        });\r\n        this[\"__v_isReadonly\" /* IS_READONLY */] = isReadonly;\r\n    }\r\n    get value() {\r\n        // the computed ref may get wrapped by other proxies e.g. readonly() #3376\r\n        const self = toRaw(this);\r\n        if (self._dirty) {\r\n            self._value = this.effect();\r\n            self._dirty = false;\r\n        }\r\n        track(self, \"get\" /* GET */, 'value');\r\n        return self._value;\r\n    }\r\n    set value(newValue) {\r\n        this._setter(newValue);\r\n    }\r\n}\r\nfunction computed(getterOrOptions) {\r\n    let getter;\r\n    let setter;\r\n    if (isFunction(getterOrOptions)) {\r\n        getter = getterOrOptions;\r\n        setter = (process.env.NODE_ENV !== 'production')\r\n            ? () => {\r\n                console.warn('Write operation failed: computed value is readonly');\r\n            }\r\n            : NOOP;\r\n    }\r\n    else {\r\n        getter = getterOrOptions.get;\r\n        setter = getterOrOptions.set;\r\n    }\r\n    return new ComputedRefImpl(getter, setter, isFunction(getterOrOptions) || !getterOrOptions.set);\r\n}\n\nexport { ITERATE_KEY, computed, customRef, effect, enableTracking, isProxy, isReactive, isReadonly, isRef, markRaw, pauseTracking, proxyRefs, reactive, readonly, ref, resetTracking, shallowReactive, shallowReadonly, shallowRef, stop, toRaw, toRef, toRefs, track, trigger, triggerRef, unref };\n","import { pauseTracking, resetTracking, isRef, toRaw, shallowReactive, trigger, isReactive, effect, stop, ref, isProxy, proxyRefs, toRef, reactive, shallowReadonly, track, computed as computed$1, isReadonly } from '@vue/reactivity';\nexport { customRef, isProxy, isReactive, isReadonly, isRef, markRaw, proxyRefs, reactive, readonly, ref, shallowReactive, shallowReadonly, shallowRef, toRaw, toRef, toRefs, triggerRef, unref } from '@vue/reactivity';\nimport { isString, isFunction, isPromise, isArray, extend, EMPTY_OBJ, toHandlerKey, toNumber, hyphenate, camelize, isOn, hasOwn, isModelListener, def, isReservedProp, EMPTY_ARR, isObject, capitalize, toRawType, makeMap, remove, NOOP, hasChanged, isSet, isMap, invokeArrayFns, NO, getGlobalThis, normalizeClass, normalizeStyle, isGloballyWhitelisted } from '@vue/shared';\nexport { camelize, capitalize, toDisplayString, toHandlerKey } from '@vue/shared';\n\nconst stack = [];\r\nfunction pushWarningContext(vnode) {\r\n    stack.push(vnode);\r\n}\r\nfunction popWarningContext() {\r\n    stack.pop();\r\n}\r\nfunction warn(msg, ...args) {\r\n    // avoid props formatting or warn handler tracking deps that might be mutated\r\n    // during patch, leading to infinite recursion.\r\n    pauseTracking();\r\n    const instance = stack.length ? stack[stack.length - 1].component : null;\r\n    const appWarnHandler = instance && instance.appContext.config.warnHandler;\r\n    const trace = getComponentTrace();\r\n    if (appWarnHandler) {\r\n        callWithErrorHandling(appWarnHandler, instance, 11 /* APP_WARN_HANDLER */, [\r\n            msg + args.join(''),\r\n            instance && instance.proxy,\r\n            trace\r\n                .map(({ vnode }) => `at <${formatComponentName(instance, vnode.type)}>`)\r\n                .join('\\n'),\r\n            trace\r\n        ]);\r\n    }\r\n    else {\r\n        const warnArgs = [`[Vue warn]: ${msg}`, ...args];\r\n        /* istanbul ignore if */\r\n        if (trace.length &&\r\n            // avoid spamming console during tests\r\n            !false) {\r\n            warnArgs.push(`\\n`, ...formatTrace(trace));\r\n        }\r\n        console.warn(...warnArgs);\r\n    }\r\n    resetTracking();\r\n}\r\nfunction getComponentTrace() {\r\n    let currentVNode = stack[stack.length - 1];\r\n    if (!currentVNode) {\r\n        return [];\r\n    }\r\n    // we can't just use the stack because it will be incomplete during updates\r\n    // that did not start from the root. Re-construct the parent chain using\r\n    // instance parent pointers.\r\n    const normalizedStack = [];\r\n    while (currentVNode) {\r\n        const last = normalizedStack[0];\r\n        if (last && last.vnode === currentVNode) {\r\n            last.recurseCount++;\r\n        }\r\n        else {\r\n            normalizedStack.push({\r\n                vnode: currentVNode,\r\n                recurseCount: 0\r\n            });\r\n        }\r\n        const parentInstance = currentVNode.component && currentVNode.component.parent;\r\n        currentVNode = parentInstance && parentInstance.vnode;\r\n    }\r\n    return normalizedStack;\r\n}\r\n/* istanbul ignore next */\r\nfunction formatTrace(trace) {\r\n    const logs = [];\r\n    trace.forEach((entry, i) => {\r\n        logs.push(...(i === 0 ? [] : [`\\n`]), ...formatTraceEntry(entry));\r\n    });\r\n    return logs;\r\n}\r\nfunction formatTraceEntry({ vnode, recurseCount }) {\r\n    const postfix = recurseCount > 0 ? `... (${recurseCount} recursive calls)` : ``;\r\n    const isRoot = vnode.component ? vnode.component.parent == null : false;\r\n    const open = ` at <${formatComponentName(vnode.component, vnode.type, isRoot)}`;\r\n    const close = `>` + postfix;\r\n    return vnode.props\r\n        ? [open, ...formatProps(vnode.props), close]\r\n        : [open + close];\r\n}\r\n/* istanbul ignore next */\r\nfunction formatProps(props) {\r\n    const res = [];\r\n    const keys = Object.keys(props);\r\n    keys.slice(0, 3).forEach(key => {\r\n        res.push(...formatProp(key, props[key]));\r\n    });\r\n    if (keys.length > 3) {\r\n        res.push(` ...`);\r\n    }\r\n    return res;\r\n}\r\n/* istanbul ignore next */\r\nfunction formatProp(key, value, raw) {\r\n    if (isString(value)) {\r\n        value = JSON.stringify(value);\r\n        return raw ? value : [`${key}=${value}`];\r\n    }\r\n    else if (typeof value === 'number' ||\r\n        typeof value === 'boolean' ||\r\n        value == null) {\r\n        return raw ? value : [`${key}=${value}`];\r\n    }\r\n    else if (isRef(value)) {\r\n        value = formatProp(key, toRaw(value.value), true);\r\n        return raw ? value : [`${key}=Ref<`, value, `>`];\r\n    }\r\n    else if (isFunction(value)) {\r\n        return [`${key}=fn${value.name ? `<${value.name}>` : ``}`];\r\n    }\r\n    else {\r\n        value = toRaw(value);\r\n        return raw ? value : [`${key}=`, value];\r\n    }\r\n}\n\nconst ErrorTypeStrings = {\r\n    [\"bc\" /* BEFORE_CREATE */]: 'beforeCreate hook',\r\n    [\"c\" /* CREATED */]: 'created hook',\r\n    [\"bm\" /* BEFORE_MOUNT */]: 'beforeMount hook',\r\n    [\"m\" /* MOUNTED */]: 'mounted hook',\r\n    [\"bu\" /* BEFORE_UPDATE */]: 'beforeUpdate hook',\r\n    [\"u\" /* UPDATED */]: 'updated',\r\n    [\"bum\" /* BEFORE_UNMOUNT */]: 'beforeUnmount hook',\r\n    [\"um\" /* UNMOUNTED */]: 'unmounted hook',\r\n    [\"a\" /* ACTIVATED */]: 'activated hook',\r\n    [\"da\" /* DEACTIVATED */]: 'deactivated hook',\r\n    [\"ec\" /* ERROR_CAPTURED */]: 'errorCaptured hook',\r\n    [\"rtc\" /* RENDER_TRACKED */]: 'renderTracked hook',\r\n    [\"rtg\" /* RENDER_TRIGGERED */]: 'renderTriggered hook',\r\n    [0 /* SETUP_FUNCTION */]: 'setup function',\r\n    [1 /* RENDER_FUNCTION */]: 'render function',\r\n    [2 /* WATCH_GETTER */]: 'watcher getter',\r\n    [3 /* WATCH_CALLBACK */]: 'watcher callback',\r\n    [4 /* WATCH_CLEANUP */]: 'watcher cleanup function',\r\n    [5 /* NATIVE_EVENT_HANDLER */]: 'native event handler',\r\n    [6 /* COMPONENT_EVENT_HANDLER */]: 'component event handler',\r\n    [7 /* VNODE_HOOK */]: 'vnode hook',\r\n    [8 /* DIRECTIVE_HOOK */]: 'directive hook',\r\n    [9 /* TRANSITION_HOOK */]: 'transition hook',\r\n    [10 /* APP_ERROR_HANDLER */]: 'app errorHandler',\r\n    [11 /* APP_WARN_HANDLER */]: 'app warnHandler',\r\n    [12 /* FUNCTION_REF */]: 'ref function',\r\n    [13 /* ASYNC_COMPONENT_LOADER */]: 'async component loader',\r\n    [14 /* SCHEDULER */]: 'scheduler flush. This is likely a Vue internals bug. ' +\r\n        'Please open an issue at https://new-issue.vuejs.org/?repo=vuejs/vue-next'\r\n};\r\nfunction callWithErrorHandling(fn, instance, type, args) {\r\n    let res;\r\n    try {\r\n        res = args ? fn(...args) : fn();\r\n    }\r\n    catch (err) {\r\n        handleError(err, instance, type);\r\n    }\r\n    return res;\r\n}\r\nfunction callWithAsyncErrorHandling(fn, instance, type, args) {\r\n    if (isFunction(fn)) {\r\n        const res = callWithErrorHandling(fn, instance, type, args);\r\n        if (res && isPromise(res)) {\r\n            res.catch(err => {\r\n                handleError(err, instance, type);\r\n            });\r\n        }\r\n        return res;\r\n    }\r\n    const values = [];\r\n    for (let i = 0; i < fn.length; i++) {\r\n        values.push(callWithAsyncErrorHandling(fn[i], instance, type, args));\r\n    }\r\n    return values;\r\n}\r\nfunction handleError(err, instance, type, throwInDev = true) {\r\n    const contextVNode = instance ? instance.vnode : null;\r\n    if (instance) {\r\n        let cur = instance.parent;\r\n        // the exposed instance is the render proxy to keep it consistent with 2.x\r\n        const exposedInstance = instance.proxy;\r\n        // in production the hook receives only the error code\r\n        const errorInfo = (process.env.NODE_ENV !== 'production') ? ErrorTypeStrings[type] : type;\r\n        while (cur) {\r\n            const errorCapturedHooks = cur.ec;\r\n            if (errorCapturedHooks) {\r\n                for (let i = 0; i < errorCapturedHooks.length; i++) {\r\n                    if (errorCapturedHooks[i](err, exposedInstance, errorInfo) === false) {\r\n                        return;\r\n                    }\r\n                }\r\n            }\r\n            cur = cur.parent;\r\n        }\r\n        // app-level handling\r\n        const appErrorHandler = instance.appContext.config.errorHandler;\r\n        if (appErrorHandler) {\r\n            callWithErrorHandling(appErrorHandler, null, 10 /* APP_ERROR_HANDLER */, [err, exposedInstance, errorInfo]);\r\n            return;\r\n        }\r\n    }\r\n    logError(err, type, contextVNode, throwInDev);\r\n}\r\nfunction logError(err, type, contextVNode, throwInDev = true) {\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        const info = ErrorTypeStrings[type];\r\n        if (contextVNode) {\r\n            pushWarningContext(contextVNode);\r\n        }\r\n        warn(`Unhandled error${info ? ` during execution of ${info}` : ``}`);\r\n        if (contextVNode) {\r\n            popWarningContext();\r\n        }\r\n        // crash in dev by default so it's more noticeable\r\n        if (throwInDev) {\r\n            throw err;\r\n        }\r\n        else {\r\n            console.error(err);\r\n        }\r\n    }\r\n    else {\r\n        // recover in prod to reduce the impact on end-user\r\n        console.error(err);\r\n    }\r\n}\n\nlet isFlushing = false;\r\nlet isFlushPending = false;\r\nconst queue = [];\r\nlet flushIndex = 0;\r\nconst pendingPreFlushCbs = [];\r\nlet activePreFlushCbs = null;\r\nlet preFlushIndex = 0;\r\nconst pendingPostFlushCbs = [];\r\nlet activePostFlushCbs = null;\r\nlet postFlushIndex = 0;\r\nconst resolvedPromise = Promise.resolve();\r\nlet currentFlushPromise = null;\r\nlet currentPreFlushParentJob = null;\r\nconst RECURSION_LIMIT = 100;\r\nfunction nextTick(fn) {\r\n    const p = currentFlushPromise || resolvedPromise;\r\n    return fn ? p.then(this ? fn.bind(this) : fn) : p;\r\n}\r\n// #2768\r\n// Use binary-search to find a suitable position in the queue,\r\n// so that the queue maintains the increasing order of job's id,\r\n// which can prevent the job from being skipped and also can avoid repeated patching.\r\nfunction findInsertionIndex(job) {\r\n    // the start index should be `flushIndex + 1`\r\n    let start = flushIndex + 1;\r\n    let end = queue.length;\r\n    const jobId = getId(job);\r\n    while (start < end) {\r\n        const middle = (start + end) >>> 1;\r\n        const middleJobId = getId(queue[middle]);\r\n        middleJobId < jobId ? (start = middle + 1) : (end = middle);\r\n    }\r\n    return start;\r\n}\r\nfunction queueJob(job) {\r\n    // the dedupe search uses the startIndex argument of Array.includes()\r\n    // by default the search index includes the current job that is being run\r\n    // so it cannot recursively trigger itself again.\r\n    // if the job is a watch() callback, the search will start with a +1 index to\r\n    // allow it recursively trigger itself - it is the user's responsibility to\r\n    // ensure it doesn't end up in an infinite loop.\r\n    if ((!queue.length ||\r\n        !queue.includes(job, isFlushing && job.allowRecurse ? flushIndex + 1 : flushIndex)) &&\r\n        job !== currentPreFlushParentJob) {\r\n        const pos = findInsertionIndex(job);\r\n        if (pos > -1) {\r\n            queue.splice(pos, 0, job);\r\n        }\r\n        else {\r\n            queue.push(job);\r\n        }\r\n        queueFlush();\r\n    }\r\n}\r\nfunction queueFlush() {\r\n    if (!isFlushing && !isFlushPending) {\r\n        isFlushPending = true;\r\n        currentFlushPromise = resolvedPromise.then(flushJobs);\r\n    }\r\n}\r\nfunction invalidateJob(job) {\r\n    const i = queue.indexOf(job);\r\n    if (i > flushIndex) {\r\n        queue.splice(i, 1);\r\n    }\r\n}\r\nfunction queueCb(cb, activeQueue, pendingQueue, index) {\r\n    if (!isArray(cb)) {\r\n        if (!activeQueue ||\r\n            !activeQueue.includes(cb, cb.allowRecurse ? index + 1 : index)) {\r\n            pendingQueue.push(cb);\r\n        }\r\n    }\r\n    else {\r\n        // if cb is an array, it is a component lifecycle hook which can only be\r\n        // triggered by a job, which is already deduped in the main queue, so\r\n        // we can skip duplicate check here to improve perf\r\n        pendingQueue.push(...cb);\r\n    }\r\n    queueFlush();\r\n}\r\nfunction queuePreFlushCb(cb) {\r\n    queueCb(cb, activePreFlushCbs, pendingPreFlushCbs, preFlushIndex);\r\n}\r\nfunction queuePostFlushCb(cb) {\r\n    queueCb(cb, activePostFlushCbs, pendingPostFlushCbs, postFlushIndex);\r\n}\r\nfunction flushPreFlushCbs(seen, parentJob = null) {\r\n    if (pendingPreFlushCbs.length) {\r\n        currentPreFlushParentJob = parentJob;\r\n        activePreFlushCbs = [...new Set(pendingPreFlushCbs)];\r\n        pendingPreFlushCbs.length = 0;\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            seen = seen || new Map();\r\n        }\r\n        for (preFlushIndex = 0; preFlushIndex < activePreFlushCbs.length; preFlushIndex++) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                checkRecursiveUpdates(seen, activePreFlushCbs[preFlushIndex]);\r\n            }\r\n            activePreFlushCbs[preFlushIndex]();\r\n        }\r\n        activePreFlushCbs = null;\r\n        preFlushIndex = 0;\r\n        currentPreFlushParentJob = null;\r\n        // recursively flush until it drains\r\n        flushPreFlushCbs(seen, parentJob);\r\n    }\r\n}\r\nfunction flushPostFlushCbs(seen) {\r\n    if (pendingPostFlushCbs.length) {\r\n        const deduped = [...new Set(pendingPostFlushCbs)];\r\n        pendingPostFlushCbs.length = 0;\r\n        // #1947 already has active queue, nested flushPostFlushCbs call\r\n        if (activePostFlushCbs) {\r\n            activePostFlushCbs.push(...deduped);\r\n            return;\r\n        }\r\n        activePostFlushCbs = deduped;\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            seen = seen || new Map();\r\n        }\r\n        activePostFlushCbs.sort((a, b) => getId(a) - getId(b));\r\n        for (postFlushIndex = 0; postFlushIndex < activePostFlushCbs.length; postFlushIndex++) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                checkRecursiveUpdates(seen, activePostFlushCbs[postFlushIndex]);\r\n            }\r\n            activePostFlushCbs[postFlushIndex]();\r\n        }\r\n        activePostFlushCbs = null;\r\n        postFlushIndex = 0;\r\n    }\r\n}\r\nconst getId = (job) => job.id == null ? Infinity : job.id;\r\nfunction flushJobs(seen) {\r\n    isFlushPending = false;\r\n    isFlushing = true;\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        seen = seen || new Map();\r\n    }\r\n    flushPreFlushCbs(seen);\r\n    // Sort queue before flush.\r\n    // This ensures that:\r\n    // 1. Components are updated from parent to child. (because parent is always\r\n    //    created before the child so its render effect will have smaller\r\n    //    priority number)\r\n    // 2. If a component is unmounted during a parent component's update,\r\n    //    its update can be skipped.\r\n    queue.sort((a, b) => getId(a) - getId(b));\r\n    try {\r\n        for (flushIndex = 0; flushIndex < queue.length; flushIndex++) {\r\n            const job = queue[flushIndex];\r\n            if (job) {\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    checkRecursiveUpdates(seen, job);\r\n                }\r\n                callWithErrorHandling(job, null, 14 /* SCHEDULER */);\r\n            }\r\n        }\r\n    }\r\n    finally {\r\n        flushIndex = 0;\r\n        queue.length = 0;\r\n        flushPostFlushCbs(seen);\r\n        isFlushing = false;\r\n        currentFlushPromise = null;\r\n        // some postFlushCb queued jobs!\r\n        // keep flushing until it drains.\r\n        if (queue.length || pendingPostFlushCbs.length) {\r\n            flushJobs(seen);\r\n        }\r\n    }\r\n}\r\nfunction checkRecursiveUpdates(seen, fn) {\r\n    if (!seen.has(fn)) {\r\n        seen.set(fn, 1);\r\n    }\r\n    else {\r\n        const count = seen.get(fn);\r\n        if (count > RECURSION_LIMIT) {\r\n            throw new Error(`Maximum recursive updates exceeded. ` +\r\n                `This means you have a reactive effect that is mutating its own ` +\r\n                `dependencies and thus recursively triggering itself. Possible sources ` +\r\n                `include component template, render function, updated hook or ` +\r\n                `watcher source function.`);\r\n        }\r\n        else {\r\n            seen.set(fn, count + 1);\r\n        }\r\n    }\r\n}\n\n/* eslint-disable no-restricted-globals */\r\nlet isHmrUpdating = false;\r\nconst hmrDirtyComponents = new Set();\r\n// Expose the HMR runtime on the global object\r\n// This makes it entirely tree-shakable without polluting the exports and makes\r\n// it easier to be used in toolings like vue-loader\r\n// Note: for a component to be eligible for HMR it also needs the __hmrId option\r\n// to be set so that its instances can be registered / removed.\r\nif ((process.env.NODE_ENV !== 'production')) {\r\n    const globalObject = typeof global !== 'undefined'\r\n        ? global\r\n        : typeof self !== 'undefined'\r\n            ? self\r\n            : typeof window !== 'undefined'\r\n                ? window\r\n                : {};\r\n    globalObject.__VUE_HMR_RUNTIME__ = {\r\n        createRecord: tryWrap(createRecord),\r\n        rerender: tryWrap(rerender),\r\n        reload: tryWrap(reload)\r\n    };\r\n}\r\nconst map = new Map();\r\nfunction registerHMR(instance) {\r\n    const id = instance.type.__hmrId;\r\n    let record = map.get(id);\r\n    if (!record) {\r\n        createRecord(id, instance.type);\r\n        record = map.get(id);\r\n    }\r\n    record.instances.add(instance);\r\n}\r\nfunction unregisterHMR(instance) {\r\n    map.get(instance.type.__hmrId).instances.delete(instance);\r\n}\r\nfunction createRecord(id, component) {\r\n    if (!component) {\r\n        warn(`HMR API usage is out of date.\\n` +\r\n            `Please upgrade vue-loader/vite/rollup-plugin-vue or other relevant ` +\r\n            `dependency that handles Vue SFC compilation.`);\r\n        component = {};\r\n    }\r\n    if (map.has(id)) {\r\n        return false;\r\n    }\r\n    map.set(id, {\r\n        component: isClassComponent(component) ? component.__vccOpts : component,\r\n        instances: new Set()\r\n    });\r\n    return true;\r\n}\r\nfunction rerender(id, newRender) {\r\n    const record = map.get(id);\r\n    if (!record)\r\n        return;\r\n    if (newRender)\r\n        record.component.render = newRender;\r\n    // Array.from creates a snapshot which avoids the set being mutated during\r\n    // updates\r\n    Array.from(record.instances).forEach(instance => {\r\n        if (newRender) {\r\n            instance.render = newRender;\r\n        }\r\n        instance.renderCache = [];\r\n        // this flag forces child components with slot content to update\r\n        isHmrUpdating = true;\r\n        instance.update();\r\n        isHmrUpdating = false;\r\n    });\r\n}\r\nfunction reload(id, newComp) {\r\n    const record = map.get(id);\r\n    if (!record)\r\n        return;\r\n    // Array.from creates a snapshot which avoids the set being mutated during\r\n    // updates\r\n    const { component, instances } = record;\r\n    if (!hmrDirtyComponents.has(component)) {\r\n        // 1. Update existing comp definition to match new one\r\n        newComp = isClassComponent(newComp) ? newComp.__vccOpts : newComp;\r\n        extend(component, newComp);\r\n        for (const key in component) {\r\n            if (!(key in newComp)) {\r\n                delete component[key];\r\n            }\r\n        }\r\n        // 2. Mark component dirty. This forces the renderer to replace the component\r\n        // on patch.\r\n        hmrDirtyComponents.add(component);\r\n        // 3. Make sure to unmark the component after the reload.\r\n        queuePostFlushCb(() => {\r\n            hmrDirtyComponents.delete(component);\r\n        });\r\n    }\r\n    Array.from(instances).forEach(instance => {\r\n        if (instance.parent) {\r\n            // 4. Force the parent instance to re-render. This will cause all updated\r\n            // components to be unmounted and re-mounted. Queue the update so that we\r\n            // don't end up forcing the same parent to re-render multiple times.\r\n            queueJob(instance.parent.update);\r\n        }\r\n        else if (instance.appContext.reload) {\r\n            // root instance mounted via createApp() has a reload method\r\n            instance.appContext.reload();\r\n        }\r\n        else if (typeof window !== 'undefined') {\r\n            // root instance inside tree created via raw render(). Force reload.\r\n            window.location.reload();\r\n        }\r\n        else {\r\n            console.warn('[HMR] Root or manually mounted instance modified. Full reload required.');\r\n        }\r\n    });\r\n}\r\nfunction tryWrap(fn) {\r\n    return (id, arg) => {\r\n        try {\r\n            return fn(id, arg);\r\n        }\r\n        catch (e) {\r\n            console.error(e);\r\n            console.warn(`[HMR] Something went wrong during Vue component hot-reload. ` +\r\n                `Full reload required.`);\r\n        }\r\n    };\r\n}\n\nlet devtools;\r\nfunction setDevtoolsHook(hook) {\r\n    devtools = hook;\r\n}\r\nfunction devtoolsInitApp(app, version) {\r\n    // TODO queue if devtools is undefined\r\n    if (!devtools)\r\n        return;\r\n    devtools.emit(\"app:init\" /* APP_INIT */, app, version, {\r\n        Fragment,\r\n        Text,\r\n        Comment,\r\n        Static\r\n    });\r\n}\r\nfunction devtoolsUnmountApp(app) {\r\n    if (!devtools)\r\n        return;\r\n    devtools.emit(\"app:unmount\" /* APP_UNMOUNT */, app);\r\n}\r\nconst devtoolsComponentAdded = /*#__PURE__*/ createDevtoolsComponentHook(\"component:added\" /* COMPONENT_ADDED */);\r\nconst devtoolsComponentUpdated = /*#__PURE__*/ createDevtoolsComponentHook(\"component:updated\" /* COMPONENT_UPDATED */);\r\nconst devtoolsComponentRemoved = /*#__PURE__*/ createDevtoolsComponentHook(\"component:removed\" /* COMPONENT_REMOVED */);\r\nfunction createDevtoolsComponentHook(hook) {\r\n    return (component) => {\r\n        if (!devtools)\r\n            return;\r\n        devtools.emit(hook, component.appContext.app, component.uid, component.parent ? component.parent.uid : undefined, component);\r\n    };\r\n}\r\nfunction devtoolsComponentEmit(component, event, params) {\r\n    if (!devtools)\r\n        return;\r\n    devtools.emit(\"component:emit\" /* COMPONENT_EMIT */, component.appContext.app, component, event, params);\r\n}\n\nfunction emit(instance, event, ...rawArgs) {\r\n    const props = instance.vnode.props || EMPTY_OBJ;\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        const { emitsOptions, propsOptions: [propsOptions] } = instance;\r\n        if (emitsOptions) {\r\n            if (!(event in emitsOptions)) {\r\n                if (!propsOptions || !(toHandlerKey(event) in propsOptions)) {\r\n                    warn(`Component emitted event \"${event}\" but it is neither declared in ` +\r\n                        `the emits option nor as an \"${toHandlerKey(event)}\" prop.`);\r\n                }\r\n            }\r\n            else {\r\n                const validator = emitsOptions[event];\r\n                if (isFunction(validator)) {\r\n                    const isValid = validator(...rawArgs);\r\n                    if (!isValid) {\r\n                        warn(`Invalid event arguments: event validation failed for event \"${event}\".`);\r\n                    }\r\n                }\r\n            }\r\n        }\r\n    }\r\n    let args = rawArgs;\r\n    const isModelListener = event.startsWith('update:');\r\n    // for v-model update:xxx events, apply modifiers on args\r\n    const modelArg = isModelListener && event.slice(7);\r\n    if (modelArg && modelArg in props) {\r\n        const modifiersKey = `${modelArg === 'modelValue' ? 'model' : modelArg}Modifiers`;\r\n        const { number, trim } = props[modifiersKey] || EMPTY_OBJ;\r\n        if (trim) {\r\n            args = rawArgs.map(a => a.trim());\r\n        }\r\n        else if (number) {\r\n            args = rawArgs.map(toNumber);\r\n        }\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n        devtoolsComponentEmit(instance, event, args);\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        const lowerCaseEvent = event.toLowerCase();\r\n        if (lowerCaseEvent !== event && props[toHandlerKey(lowerCaseEvent)]) {\r\n            warn(`Event \"${lowerCaseEvent}\" is emitted in component ` +\r\n                `${formatComponentName(instance, instance.type)} but the handler is registered for \"${event}\". ` +\r\n                `Note that HTML attributes are case-insensitive and you cannot use ` +\r\n                `v-on to listen to camelCase events when using in-DOM templates. ` +\r\n                `You should probably use \"${hyphenate(event)}\" instead of \"${event}\".`);\r\n        }\r\n    }\r\n    let handlerName;\r\n    let handler = props[(handlerName = toHandlerKey(event))] ||\r\n        // also try camelCase event handler (#2249)\r\n        props[(handlerName = toHandlerKey(camelize(event)))];\r\n    // for v-model update:xxx events, also trigger kebab-case equivalent\r\n    // for props passed via kebab-case\r\n    if (!handler && isModelListener) {\r\n        handler = props[(handlerName = toHandlerKey(hyphenate(event)))];\r\n    }\r\n    if (handler) {\r\n        callWithAsyncErrorHandling(handler, instance, 6 /* COMPONENT_EVENT_HANDLER */, args);\r\n    }\r\n    const onceHandler = props[handlerName + `Once`];\r\n    if (onceHandler) {\r\n        if (!instance.emitted) {\r\n            (instance.emitted = {})[handlerName] = true;\r\n        }\r\n        else if (instance.emitted[handlerName]) {\r\n            return;\r\n        }\r\n        callWithAsyncErrorHandling(onceHandler, instance, 6 /* COMPONENT_EVENT_HANDLER */, args);\r\n    }\r\n}\r\nfunction normalizeEmitsOptions(comp, appContext, asMixin = false) {\r\n    if (!appContext.deopt && comp.__emits !== undefined) {\r\n        return comp.__emits;\r\n    }\r\n    const raw = comp.emits;\r\n    let normalized = {};\r\n    // apply mixin/extends props\r\n    let hasExtends = false;\r\n    if (__VUE_OPTIONS_API__ && !isFunction(comp)) {\r\n        const extendEmits = (raw) => {\r\n            const normalizedFromExtend = normalizeEmitsOptions(raw, appContext, true);\r\n            if (normalizedFromExtend) {\r\n                hasExtends = true;\r\n                extend(normalized, normalizedFromExtend);\r\n            }\r\n        };\r\n        if (!asMixin && appContext.mixins.length) {\r\n            appContext.mixins.forEach(extendEmits);\r\n        }\r\n        if (comp.extends) {\r\n            extendEmits(comp.extends);\r\n        }\r\n        if (comp.mixins) {\r\n            comp.mixins.forEach(extendEmits);\r\n        }\r\n    }\r\n    if (!raw && !hasExtends) {\r\n        return (comp.__emits = null);\r\n    }\r\n    if (isArray(raw)) {\r\n        raw.forEach(key => (normalized[key] = null));\r\n    }\r\n    else {\r\n        extend(normalized, raw);\r\n    }\r\n    return (comp.__emits = normalized);\r\n}\r\n// Check if an incoming prop key is a declared emit event listener.\r\n// e.g. With `emits: { click: null }`, props named `onClick` and `onclick` are\r\n// both considered matched listeners.\r\nfunction isEmitListener(options, key) {\r\n    if (!options || !isOn(key)) {\r\n        return false;\r\n    }\r\n    key = key.slice(2).replace(/Once$/, '');\r\n    return (hasOwn(options, key[0].toLowerCase() + key.slice(1)) ||\r\n        hasOwn(options, hyphenate(key)) ||\r\n        hasOwn(options, key));\r\n}\n\nlet isRenderingCompiledSlot = 0;\r\nconst setCompiledSlotRendering = (n) => (isRenderingCompiledSlot += n);\r\n/**\r\n * Compiler runtime helper for rendering `<slot/>`\r\n * @private\r\n */\r\nfunction renderSlot(slots, name, props = {}, \r\n// this is not a user-facing function, so the fallback is always generated by\r\n// the compiler and guaranteed to be a function returning an array\r\nfallback, noSlotted) {\r\n    let slot = slots[name];\r\n    if ((process.env.NODE_ENV !== 'production') && slot && slot.length > 1) {\r\n        warn(`SSR-optimized slot function detected in a non-SSR-optimized render ` +\r\n            `function. You need to mark this component with $dynamic-slots in the ` +\r\n            `parent template.`);\r\n        slot = () => [];\r\n    }\r\n    // a compiled slot disables block tracking by default to avoid manual\r\n    // invocation interfering with template-based block tracking, but in\r\n    // `renderSlot` we can be sure that it's template-based so we can force\r\n    // enable it.\r\n    isRenderingCompiledSlot++;\r\n    openBlock();\r\n    const validSlotContent = slot && ensureValidVNode(slot(props));\r\n    const rendered = createBlock(Fragment, { key: props.key || `_${name}` }, validSlotContent || (fallback ? fallback() : []), validSlotContent && slots._ === 1 /* STABLE */\r\n        ? 64 /* STABLE_FRAGMENT */\r\n        : -2 /* BAIL */);\r\n    if (!noSlotted && rendered.scopeId) {\r\n        rendered.slotScopeIds = [rendered.scopeId + '-s'];\r\n    }\r\n    isRenderingCompiledSlot--;\r\n    return rendered;\r\n}\r\nfunction ensureValidVNode(vnodes) {\r\n    return vnodes.some(child => {\r\n        if (!isVNode(child))\r\n            return true;\r\n        if (child.type === Comment)\r\n            return false;\r\n        if (child.type === Fragment &&\r\n            !ensureValidVNode(child.children))\r\n            return false;\r\n        return true;\r\n    })\r\n        ? vnodes\r\n        : null;\r\n}\n\n/**\r\n * mark the current rendering instance for asset resolution (e.g.\r\n * resolveComponent, resolveDirective) during render\r\n */\r\nlet currentRenderingInstance = null;\r\nlet currentScopeId = null;\r\n/**\r\n * Note: rendering calls maybe nested. The function returns the parent rendering\r\n * instance if present, which should be restored after the render is done:\r\n *\r\n * ```js\r\n * const prev = setCurrentRenderingInstance(i)\r\n * // ...render\r\n * setCurrentRenderingInstance(prev)\r\n * ```\r\n */\r\nfunction setCurrentRenderingInstance(instance) {\r\n    const prev = currentRenderingInstance;\r\n    currentRenderingInstance = instance;\r\n    currentScopeId = (instance && instance.type.__scopeId) || null;\r\n    return prev;\r\n}\r\n/**\r\n * Set scope id when creating hoisted vnodes.\r\n * @private compiler helper\r\n */\r\nfunction pushScopeId(id) {\r\n    currentScopeId = id;\r\n}\r\n/**\r\n * Technically we no longer need this after 3.0.8 but we need to keep the same\r\n * API for backwards compat w/ code generated by compilers.\r\n * @private\r\n */\r\nfunction popScopeId() {\r\n    currentScopeId = null;\r\n}\r\n/**\r\n * Only for backwards compat\r\n * @private\r\n */\r\nconst withScopeId = (_id) => withCtx;\r\n/**\r\n * Wrap a slot function to memoize current rendering instance\r\n * @private compiler helper\r\n */\r\nfunction withCtx(fn, ctx = currentRenderingInstance) {\r\n    if (!ctx)\r\n        return fn;\r\n    const renderFnWithContext = (...args) => {\r\n        // If a user calls a compiled slot inside a template expression (#1745), it\r\n        // can mess up block tracking, so by default we need to push a null block to\r\n        // avoid that. This isn't necessary if rendering a compiled `<slot>`.\r\n        if (!isRenderingCompiledSlot) {\r\n            openBlock(true /* null block that disables tracking */);\r\n        }\r\n        const prevInstance = setCurrentRenderingInstance(ctx);\r\n        const res = fn(...args);\r\n        setCurrentRenderingInstance(prevInstance);\r\n        if (!isRenderingCompiledSlot) {\r\n            closeBlock();\r\n        }\r\n        return res;\r\n    };\r\n    // mark this as a compiled slot function.\r\n    // this is used in vnode.ts -> normalizeChildren() to set the slot\r\n    // rendering flag.\r\n    renderFnWithContext._c = true;\r\n    return renderFnWithContext;\r\n}\n\n/**\r\n * dev only flag to track whether $attrs was used during render.\r\n * If $attrs was used during render then the warning for failed attrs\r\n * fallthrough can be suppressed.\r\n */\r\nlet accessedAttrs = false;\r\nfunction markAttrsAccessed() {\r\n    accessedAttrs = true;\r\n}\r\nfunction renderComponentRoot(instance) {\r\n    const { type: Component, vnode, proxy, withProxy, props, propsOptions: [propsOptions], slots, attrs, emit, render, renderCache, data, setupState, ctx } = instance;\r\n    let result;\r\n    const prev = setCurrentRenderingInstance(instance);\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        accessedAttrs = false;\r\n    }\r\n    try {\r\n        let fallthroughAttrs;\r\n        if (vnode.shapeFlag & 4 /* STATEFUL_COMPONENT */) {\r\n            // withProxy is a proxy with a different `has` trap only for\r\n            // runtime-compiled render functions using `with` block.\r\n            const proxyToUse = withProxy || proxy;\r\n            result = normalizeVNode(render.call(proxyToUse, proxyToUse, renderCache, props, setupState, data, ctx));\r\n            fallthroughAttrs = attrs;\r\n        }\r\n        else {\r\n            // functional\r\n            const render = Component;\r\n            // in dev, mark attrs accessed if optional props (attrs === props)\r\n            if ((process.env.NODE_ENV !== 'production') && attrs === props) {\r\n                markAttrsAccessed();\r\n            }\r\n            result = normalizeVNode(render.length > 1\r\n                ? render(props, (process.env.NODE_ENV !== 'production')\r\n                    ? {\r\n                        get attrs() {\r\n                            markAttrsAccessed();\r\n                            return attrs;\r\n                        },\r\n                        slots,\r\n                        emit\r\n                    }\r\n                    : { attrs, slots, emit })\r\n                : render(props, null /* we know it doesn't need it */));\r\n            fallthroughAttrs = Component.props\r\n                ? attrs\r\n                : getFunctionalFallthrough(attrs);\r\n        }\r\n        // attr merging\r\n        // in dev mode, comments are preserved, and it's possible for a template\r\n        // to have comments along side the root element which makes it a fragment\r\n        let root = result;\r\n        let setRoot = undefined;\r\n        if ((process.env.NODE_ENV !== 'production') &&\r\n            result.patchFlag > 0 &&\r\n            result.patchFlag & 2048 /* DEV_ROOT_FRAGMENT */) {\r\n            ;\r\n            [root, setRoot] = getChildRoot(result);\r\n        }\r\n        if (Component.inheritAttrs !== false && fallthroughAttrs) {\r\n            const keys = Object.keys(fallthroughAttrs);\r\n            const { shapeFlag } = root;\r\n            if (keys.length) {\r\n                if (shapeFlag & 1 /* ELEMENT */ ||\r\n                    shapeFlag & 6 /* COMPONENT */) {\r\n                    if (propsOptions && keys.some(isModelListener)) {\r\n                        // If a v-model listener (onUpdate:xxx) has a corresponding declared\r\n                        // prop, it indicates this component expects to handle v-model and\r\n                        // it should not fallthrough.\r\n                        // related: #1543, #1643, #1989\r\n                        fallthroughAttrs = filterModelListeners(fallthroughAttrs, propsOptions);\r\n                    }\r\n                    root = cloneVNode(root, fallthroughAttrs);\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production') && !accessedAttrs && root.type !== Comment) {\r\n                    const allAttrs = Object.keys(attrs);\r\n                    const eventAttrs = [];\r\n                    const extraAttrs = [];\r\n                    for (let i = 0, l = allAttrs.length; i < l; i++) {\r\n                        const key = allAttrs[i];\r\n                        if (isOn(key)) {\r\n                            // ignore v-model handlers when they fail to fallthrough\r\n                            if (!isModelListener(key)) {\r\n                                // remove `on`, lowercase first letter to reflect event casing\r\n                                // accurately\r\n                                eventAttrs.push(key[2].toLowerCase() + key.slice(3));\r\n                            }\r\n                        }\r\n                        else {\r\n                            extraAttrs.push(key);\r\n                        }\r\n                    }\r\n                    if (extraAttrs.length) {\r\n                        warn(`Extraneous non-props attributes (` +\r\n                            `${extraAttrs.join(', ')}) ` +\r\n                            `were passed to component but could not be automatically inherited ` +\r\n                            `because component renders fragment or text root nodes.`);\r\n                    }\r\n                    if (eventAttrs.length) {\r\n                        warn(`Extraneous non-emits event listeners (` +\r\n                            `${eventAttrs.join(', ')}) ` +\r\n                            `were passed to component but could not be automatically inherited ` +\r\n                            `because component renders fragment or text root nodes. ` +\r\n                            `If the listener is intended to be a component custom event listener only, ` +\r\n                            `declare it using the \"emits\" option.`);\r\n                    }\r\n                }\r\n            }\r\n        }\r\n        // inherit directives\r\n        if (vnode.dirs) {\r\n            if ((process.env.NODE_ENV !== 'production') && !isElementRoot(root)) {\r\n                warn(`Runtime directive used on component with non-element root node. ` +\r\n                    `The directives will not function as intended.`);\r\n            }\r\n            root.dirs = root.dirs ? root.dirs.concat(vnode.dirs) : vnode.dirs;\r\n        }\r\n        // inherit transition data\r\n        if (vnode.transition) {\r\n            if ((process.env.NODE_ENV !== 'production') && !isElementRoot(root)) {\r\n                warn(`Component inside <Transition> renders non-element root node ` +\r\n                    `that cannot be animated.`);\r\n            }\r\n            root.transition = vnode.transition;\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production') && setRoot) {\r\n            setRoot(root);\r\n        }\r\n        else {\r\n            result = root;\r\n        }\r\n    }\r\n    catch (err) {\r\n        blockStack.length = 0;\r\n        handleError(err, instance, 1 /* RENDER_FUNCTION */);\r\n        result = createVNode(Comment);\r\n    }\r\n    setCurrentRenderingInstance(prev);\r\n    return result;\r\n}\r\n/**\r\n * dev only\r\n * In dev mode, template root level comments are rendered, which turns the\r\n * template into a fragment root, but we need to locate the single element\r\n * root for attrs and scope id processing.\r\n */\r\nconst getChildRoot = (vnode) => {\r\n    const rawChildren = vnode.children;\r\n    const dynamicChildren = vnode.dynamicChildren;\r\n    const childRoot = filterSingleRoot(rawChildren);\r\n    if (!childRoot) {\r\n        return [vnode, undefined];\r\n    }\r\n    const index = rawChildren.indexOf(childRoot);\r\n    const dynamicIndex = dynamicChildren ? dynamicChildren.indexOf(childRoot) : -1;\r\n    const setRoot = (updatedRoot) => {\r\n        rawChildren[index] = updatedRoot;\r\n        if (dynamicChildren) {\r\n            if (dynamicIndex > -1) {\r\n                dynamicChildren[dynamicIndex] = updatedRoot;\r\n            }\r\n            else if (updatedRoot.patchFlag > 0) {\r\n                vnode.dynamicChildren = [...dynamicChildren, updatedRoot];\r\n            }\r\n        }\r\n    };\r\n    return [normalizeVNode(childRoot), setRoot];\r\n};\r\nfunction filterSingleRoot(children) {\r\n    let singleRoot;\r\n    for (let i = 0; i < children.length; i++) {\r\n        const child = children[i];\r\n        if (isVNode(child)) {\r\n            // ignore user comment\r\n            if (child.type !== Comment || child.children === 'v-if') {\r\n                if (singleRoot) {\r\n                    // has more than 1 non-comment child, return now\r\n                    return;\r\n                }\r\n                else {\r\n                    singleRoot = child;\r\n                }\r\n            }\r\n        }\r\n        else {\r\n            return;\r\n        }\r\n    }\r\n    return singleRoot;\r\n}\r\nconst getFunctionalFallthrough = (attrs) => {\r\n    let res;\r\n    for (const key in attrs) {\r\n        if (key === 'class' || key === 'style' || isOn(key)) {\r\n            (res || (res = {}))[key] = attrs[key];\r\n        }\r\n    }\r\n    return res;\r\n};\r\nconst filterModelListeners = (attrs, props) => {\r\n    const res = {};\r\n    for (const key in attrs) {\r\n        if (!isModelListener(key) || !(key.slice(9) in props)) {\r\n            res[key] = attrs[key];\r\n        }\r\n    }\r\n    return res;\r\n};\r\nconst isElementRoot = (vnode) => {\r\n    return (vnode.shapeFlag & 6 /* COMPONENT */ ||\r\n        vnode.shapeFlag & 1 /* ELEMENT */ ||\r\n        vnode.type === Comment // potential v-if branch switch\r\n    );\r\n};\r\nfunction shouldUpdateComponent(prevVNode, nextVNode, optimized) {\r\n    const { props: prevProps, children: prevChildren, component } = prevVNode;\r\n    const { props: nextProps, children: nextChildren, patchFlag } = nextVNode;\r\n    const emits = component.emitsOptions;\r\n    // Parent component's render function was hot-updated. Since this may have\r\n    // caused the child component's slots content to have changed, we need to\r\n    // force the child to update as well.\r\n    if ((process.env.NODE_ENV !== 'production') && (prevChildren || nextChildren) && isHmrUpdating) {\r\n        return true;\r\n    }\r\n    // force child update for runtime directive or transition on component vnode.\r\n    if (nextVNode.dirs || nextVNode.transition) {\r\n        return true;\r\n    }\r\n    if (optimized && patchFlag >= 0) {\r\n        if (patchFlag & 1024 /* DYNAMIC_SLOTS */) {\r\n            // slot content that references values that might have changed,\r\n            // e.g. in a v-for\r\n            return true;\r\n        }\r\n        if (patchFlag & 16 /* FULL_PROPS */) {\r\n            if (!prevProps) {\r\n                return !!nextProps;\r\n            }\r\n            // presence of this flag indicates props are always non-null\r\n            return hasPropsChanged(prevProps, nextProps, emits);\r\n        }\r\n        else if (patchFlag & 8 /* PROPS */) {\r\n            const dynamicProps = nextVNode.dynamicProps;\r\n            for (let i = 0; i < dynamicProps.length; i++) {\r\n                const key = dynamicProps[i];\r\n                if (nextProps[key] !== prevProps[key] &&\r\n                    !isEmitListener(emits, key)) {\r\n                    return true;\r\n                }\r\n            }\r\n        }\r\n    }\r\n    else {\r\n        // this path is only taken by manually written render functions\r\n        // so presence of any children leads to a forced update\r\n        if (prevChildren || nextChildren) {\r\n            if (!nextChildren || !nextChildren.$stable) {\r\n                return true;\r\n            }\r\n        }\r\n        if (prevProps === nextProps) {\r\n            return false;\r\n        }\r\n        if (!prevProps) {\r\n            return !!nextProps;\r\n        }\r\n        if (!nextProps) {\r\n            return true;\r\n        }\r\n        return hasPropsChanged(prevProps, nextProps, emits);\r\n    }\r\n    return false;\r\n}\r\nfunction hasPropsChanged(prevProps, nextProps, emitsOptions) {\r\n    const nextKeys = Object.keys(nextProps);\r\n    if (nextKeys.length !== Object.keys(prevProps).length) {\r\n        return true;\r\n    }\r\n    for (let i = 0; i < nextKeys.length; i++) {\r\n        const key = nextKeys[i];\r\n        if (nextProps[key] !== prevProps[key] &&\r\n            !isEmitListener(emitsOptions, key)) {\r\n            return true;\r\n        }\r\n    }\r\n    return false;\r\n}\r\nfunction updateHOCHostEl({ vnode, parent }, el // HostNode\r\n) {\r\n    while (parent && parent.subTree === vnode) {\r\n        (vnode = parent.vnode).el = el;\r\n        parent = parent.parent;\r\n    }\r\n}\n\nconst isSuspense = (type) => type.__isSuspense;\r\n// Suspense exposes a component-like API, and is treated like a component\r\n// in the compiler, but internally it's a special built-in type that hooks\r\n// directly into the renderer.\r\nconst SuspenseImpl = {\r\n    name: 'Suspense',\r\n    // In order to make Suspense tree-shakable, we need to avoid importing it\r\n    // directly in the renderer. The renderer checks for the __isSuspense flag\r\n    // on a vnode's type and calls the `process` method, passing in renderer\r\n    // internals.\r\n    __isSuspense: true,\r\n    process(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, \r\n    // platform-specific impl passed from renderer\r\n    rendererInternals) {\r\n        if (n1 == null) {\r\n            mountSuspense(n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, rendererInternals);\r\n        }\r\n        else {\r\n            patchSuspense(n1, n2, container, anchor, parentComponent, isSVG, slotScopeIds, optimized, rendererInternals);\r\n        }\r\n    },\r\n    hydrate: hydrateSuspense,\r\n    create: createSuspenseBoundary\r\n};\r\n// Force-casted public typing for h and TSX props inference\r\nconst Suspense = (SuspenseImpl\r\n    );\r\nfunction mountSuspense(vnode, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, rendererInternals) {\r\n    const { p: patch, o: { createElement } } = rendererInternals;\r\n    const hiddenContainer = createElement('div');\r\n    const suspense = (vnode.suspense = createSuspenseBoundary(vnode, parentSuspense, parentComponent, container, hiddenContainer, anchor, isSVG, slotScopeIds, optimized, rendererInternals));\r\n    // start mounting the content subtree in an off-dom container\r\n    patch(null, (suspense.pendingBranch = vnode.ssContent), hiddenContainer, null, parentComponent, suspense, isSVG, slotScopeIds);\r\n    // now check if we have encountered any async deps\r\n    if (suspense.deps > 0) {\r\n        // has async\r\n        // mount the fallback tree\r\n        patch(null, vnode.ssFallback, container, anchor, parentComponent, null, // fallback tree will not have suspense context\r\n        isSVG, slotScopeIds);\r\n        setActiveBranch(suspense, vnode.ssFallback);\r\n    }\r\n    else {\r\n        // Suspense has no async deps. Just resolve.\r\n        suspense.resolve();\r\n    }\r\n}\r\nfunction patchSuspense(n1, n2, container, anchor, parentComponent, isSVG, slotScopeIds, optimized, { p: patch, um: unmount, o: { createElement } }) {\r\n    const suspense = (n2.suspense = n1.suspense);\r\n    suspense.vnode = n2;\r\n    n2.el = n1.el;\r\n    const newBranch = n2.ssContent;\r\n    const newFallback = n2.ssFallback;\r\n    const { activeBranch, pendingBranch, isInFallback, isHydrating } = suspense;\r\n    if (pendingBranch) {\r\n        suspense.pendingBranch = newBranch;\r\n        if (isSameVNodeType(newBranch, pendingBranch)) {\r\n            // same root type but content may have changed.\r\n            patch(pendingBranch, newBranch, suspense.hiddenContainer, null, parentComponent, suspense, isSVG, slotScopeIds, optimized);\r\n            if (suspense.deps <= 0) {\r\n                suspense.resolve();\r\n            }\r\n            else if (isInFallback) {\r\n                patch(activeBranch, newFallback, container, anchor, parentComponent, null, // fallback tree will not have suspense context\r\n                isSVG, slotScopeIds, optimized);\r\n                setActiveBranch(suspense, newFallback);\r\n            }\r\n        }\r\n        else {\r\n            // toggled before pending tree is resolved\r\n            suspense.pendingId++;\r\n            if (isHydrating) {\r\n                // if toggled before hydration is finished, the current DOM tree is\r\n                // no longer valid. set it as the active branch so it will be unmounted\r\n                // when resolved\r\n                suspense.isHydrating = false;\r\n                suspense.activeBranch = pendingBranch;\r\n            }\r\n            else {\r\n                unmount(pendingBranch, parentComponent, suspense);\r\n            }\r\n            // increment pending ID. this is used to invalidate async callbacks\r\n            // reset suspense state\r\n            suspense.deps = 0;\r\n            // discard effects from pending branch\r\n            suspense.effects.length = 0;\r\n            // discard previous container\r\n            suspense.hiddenContainer = createElement('div');\r\n            if (isInFallback) {\r\n                // already in fallback state\r\n                patch(null, newBranch, suspense.hiddenContainer, null, parentComponent, suspense, isSVG, slotScopeIds, optimized);\r\n                if (suspense.deps <= 0) {\r\n                    suspense.resolve();\r\n                }\r\n                else {\r\n                    patch(activeBranch, newFallback, container, anchor, parentComponent, null, // fallback tree will not have suspense context\r\n                    isSVG, slotScopeIds, optimized);\r\n                    setActiveBranch(suspense, newFallback);\r\n                }\r\n            }\r\n            else if (activeBranch && isSameVNodeType(newBranch, activeBranch)) {\r\n                // toggled \"back\" to current active branch\r\n                patch(activeBranch, newBranch, container, anchor, parentComponent, suspense, isSVG, slotScopeIds, optimized);\r\n                // force resolve\r\n                suspense.resolve(true);\r\n            }\r\n            else {\r\n                // switched to a 3rd branch\r\n                patch(null, newBranch, suspense.hiddenContainer, null, parentComponent, suspense, isSVG, slotScopeIds, optimized);\r\n                if (suspense.deps <= 0) {\r\n                    suspense.resolve();\r\n                }\r\n            }\r\n        }\r\n    }\r\n    else {\r\n        if (activeBranch && isSameVNodeType(newBranch, activeBranch)) {\r\n            // root did not change, just normal patch\r\n            patch(activeBranch, newBranch, container, anchor, parentComponent, suspense, isSVG, slotScopeIds, optimized);\r\n            setActiveBranch(suspense, newBranch);\r\n        }\r\n        else {\r\n            // root node toggled\r\n            // invoke @pending event\r\n            const onPending = n2.props && n2.props.onPending;\r\n            if (isFunction(onPending)) {\r\n                onPending();\r\n            }\r\n            // mount pending branch in off-dom container\r\n            suspense.pendingBranch = newBranch;\r\n            suspense.pendingId++;\r\n            patch(null, newBranch, suspense.hiddenContainer, null, parentComponent, suspense, isSVG, slotScopeIds, optimized);\r\n            if (suspense.deps <= 0) {\r\n                // incoming branch has no async deps, resolve now.\r\n                suspense.resolve();\r\n            }\r\n            else {\r\n                const { timeout, pendingId } = suspense;\r\n                if (timeout > 0) {\r\n                    setTimeout(() => {\r\n                        if (suspense.pendingId === pendingId) {\r\n                            suspense.fallback(newFallback);\r\n                        }\r\n                    }, timeout);\r\n                }\r\n                else if (timeout === 0) {\r\n                    suspense.fallback(newFallback);\r\n                }\r\n            }\r\n        }\r\n    }\r\n}\r\nlet hasWarned = false;\r\nfunction createSuspenseBoundary(vnode, parent, parentComponent, container, hiddenContainer, anchor, isSVG, slotScopeIds, optimized, rendererInternals, isHydrating = false) {\r\n    /* istanbul ignore if */\r\n    if ((process.env.NODE_ENV !== 'production') && !false && !hasWarned) {\r\n        hasWarned = true;\r\n        // @ts-ignore `console.info` cannot be null error\r\n        console[console.info ? 'info' : 'log'](`<Suspense> is an experimental feature and its API will likely change.`);\r\n    }\r\n    const { p: patch, m: move, um: unmount, n: next, o: { parentNode, remove } } = rendererInternals;\r\n    const timeout = toNumber(vnode.props && vnode.props.timeout);\r\n    const suspense = {\r\n        vnode,\r\n        parent,\r\n        parentComponent,\r\n        isSVG,\r\n        container,\r\n        hiddenContainer,\r\n        anchor,\r\n        deps: 0,\r\n        pendingId: 0,\r\n        timeout: typeof timeout === 'number' ? timeout : -1,\r\n        activeBranch: null,\r\n        pendingBranch: null,\r\n        isInFallback: true,\r\n        isHydrating,\r\n        isUnmounted: false,\r\n        effects: [],\r\n        resolve(resume = false) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                if (!resume && !suspense.pendingBranch) {\r\n                    throw new Error(`suspense.resolve() is called without a pending branch.`);\r\n                }\r\n                if (suspense.isUnmounted) {\r\n                    throw new Error(`suspense.resolve() is called on an already unmounted suspense boundary.`);\r\n                }\r\n            }\r\n            const { vnode, activeBranch, pendingBranch, pendingId, effects, parentComponent, container } = suspense;\r\n            if (suspense.isHydrating) {\r\n                suspense.isHydrating = false;\r\n            }\r\n            else if (!resume) {\r\n                const delayEnter = activeBranch &&\r\n                    pendingBranch.transition &&\r\n                    pendingBranch.transition.mode === 'out-in';\r\n                if (delayEnter) {\r\n                    activeBranch.transition.afterLeave = () => {\r\n                        if (pendingId === suspense.pendingId) {\r\n                            move(pendingBranch, container, anchor, 0 /* ENTER */);\r\n                        }\r\n                    };\r\n                }\r\n                // this is initial anchor on mount\r\n                let { anchor } = suspense;\r\n                // unmount current active tree\r\n                if (activeBranch) {\r\n                    // if the fallback tree was mounted, it may have been moved\r\n                    // as part of a parent suspense. get the latest anchor for insertion\r\n                    anchor = next(activeBranch);\r\n                    unmount(activeBranch, parentComponent, suspense, true);\r\n                }\r\n                if (!delayEnter) {\r\n                    // move content from off-dom container to actual container\r\n                    move(pendingBranch, container, anchor, 0 /* ENTER */);\r\n                }\r\n            }\r\n            setActiveBranch(suspense, pendingBranch);\r\n            suspense.pendingBranch = null;\r\n            suspense.isInFallback = false;\r\n            // flush buffered effects\r\n            // check if there is a pending parent suspense\r\n            let parent = suspense.parent;\r\n            let hasUnresolvedAncestor = false;\r\n            while (parent) {\r\n                if (parent.pendingBranch) {\r\n                    // found a pending parent suspense, merge buffered post jobs\r\n                    // into that parent\r\n                    parent.effects.push(...effects);\r\n                    hasUnresolvedAncestor = true;\r\n                    break;\r\n                }\r\n                parent = parent.parent;\r\n            }\r\n            // no pending parent suspense, flush all jobs\r\n            if (!hasUnresolvedAncestor) {\r\n                queuePostFlushCb(effects);\r\n            }\r\n            suspense.effects = [];\r\n            // invoke @resolve event\r\n            const onResolve = vnode.props && vnode.props.onResolve;\r\n            if (isFunction(onResolve)) {\r\n                onResolve();\r\n            }\r\n        },\r\n        fallback(fallbackVNode) {\r\n            if (!suspense.pendingBranch) {\r\n                return;\r\n            }\r\n            const { vnode, activeBranch, parentComponent, container, isSVG } = suspense;\r\n            // invoke @fallback event\r\n            const onFallback = vnode.props && vnode.props.onFallback;\r\n            if (isFunction(onFallback)) {\r\n                onFallback();\r\n            }\r\n            const anchor = next(activeBranch);\r\n            const mountFallback = () => {\r\n                if (!suspense.isInFallback) {\r\n                    return;\r\n                }\r\n                // mount the fallback tree\r\n                patch(null, fallbackVNode, container, anchor, parentComponent, null, // fallback tree will not have suspense context\r\n                isSVG, slotScopeIds, optimized);\r\n                setActiveBranch(suspense, fallbackVNode);\r\n            };\r\n            const delayEnter = fallbackVNode.transition && fallbackVNode.transition.mode === 'out-in';\r\n            if (delayEnter) {\r\n                activeBranch.transition.afterLeave = mountFallback;\r\n            }\r\n            // unmount current active branch\r\n            unmount(activeBranch, parentComponent, null, // no suspense so unmount hooks fire now\r\n            true // shouldRemove\r\n            );\r\n            suspense.isInFallback = true;\r\n            if (!delayEnter) {\r\n                mountFallback();\r\n            }\r\n        },\r\n        move(container, anchor, type) {\r\n            suspense.activeBranch &&\r\n                move(suspense.activeBranch, container, anchor, type);\r\n            suspense.container = container;\r\n        },\r\n        next() {\r\n            return suspense.activeBranch && next(suspense.activeBranch);\r\n        },\r\n        registerDep(instance, setupRenderEffect) {\r\n            const isInPendingSuspense = !!suspense.pendingBranch;\r\n            if (isInPendingSuspense) {\r\n                suspense.deps++;\r\n            }\r\n            const hydratedEl = instance.vnode.el;\r\n            instance\r\n                .asyncDep.catch(err => {\r\n                handleError(err, instance, 0 /* SETUP_FUNCTION */);\r\n            })\r\n                .then(asyncSetupResult => {\r\n                // retry when the setup() promise resolves.\r\n                // component may have been unmounted before resolve.\r\n                if (instance.isUnmounted ||\r\n                    suspense.isUnmounted ||\r\n                    suspense.pendingId !== instance.suspenseId) {\r\n                    return;\r\n                }\r\n                // retry from this component\r\n                instance.asyncResolved = true;\r\n                const { vnode } = instance;\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    pushWarningContext(vnode);\r\n                }\r\n                handleSetupResult(instance, asyncSetupResult, false);\r\n                if (hydratedEl) {\r\n                    // vnode may have been replaced if an update happened before the\r\n                    // async dep is resolved.\r\n                    vnode.el = hydratedEl;\r\n                }\r\n                const placeholder = !hydratedEl && instance.subTree.el;\r\n                setupRenderEffect(instance, vnode, \r\n                // component may have been moved before resolve.\r\n                // if this is not a hydration, instance.subTree will be the comment\r\n                // placeholder.\r\n                parentNode(hydratedEl || instance.subTree.el), \r\n                // anchor will not be used if this is hydration, so only need to\r\n                // consider the comment placeholder case.\r\n                hydratedEl ? null : next(instance.subTree), suspense, isSVG, optimized);\r\n                if (placeholder) {\r\n                    remove(placeholder);\r\n                }\r\n                updateHOCHostEl(instance, vnode.el);\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    popWarningContext();\r\n                }\r\n                // only decrease deps count if suspense is not already resolved\r\n                if (isInPendingSuspense && --suspense.deps === 0) {\r\n                    suspense.resolve();\r\n                }\r\n            });\r\n        },\r\n        unmount(parentSuspense, doRemove) {\r\n            suspense.isUnmounted = true;\r\n            if (suspense.activeBranch) {\r\n                unmount(suspense.activeBranch, parentComponent, parentSuspense, doRemove);\r\n            }\r\n            if (suspense.pendingBranch) {\r\n                unmount(suspense.pendingBranch, parentComponent, parentSuspense, doRemove);\r\n            }\r\n        }\r\n    };\r\n    return suspense;\r\n}\r\nfunction hydrateSuspense(node, vnode, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, rendererInternals, hydrateNode) {\r\n    /* eslint-disable no-restricted-globals */\r\n    const suspense = (vnode.suspense = createSuspenseBoundary(vnode, parentSuspense, parentComponent, node.parentNode, document.createElement('div'), null, isSVG, slotScopeIds, optimized, rendererInternals, true /* hydrating */));\r\n    // there are two possible scenarios for server-rendered suspense:\r\n    // - success: ssr content should be fully resolved\r\n    // - failure: ssr content should be the fallback branch.\r\n    // however, on the client we don't really know if it has failed or not\r\n    // attempt to hydrate the DOM assuming it has succeeded, but we still\r\n    // need to construct a suspense boundary first\r\n    const result = hydrateNode(node, (suspense.pendingBranch = vnode.ssContent), parentComponent, suspense, slotScopeIds, optimized);\r\n    if (suspense.deps === 0) {\r\n        suspense.resolve();\r\n    }\r\n    return result;\r\n    /* eslint-enable no-restricted-globals */\r\n}\r\nfunction normalizeSuspenseChildren(vnode) {\r\n    const { shapeFlag, children } = vnode;\r\n    let content;\r\n    let fallback;\r\n    if (shapeFlag & 32 /* SLOTS_CHILDREN */) {\r\n        content = normalizeSuspenseSlot(children.default);\r\n        fallback = normalizeSuspenseSlot(children.fallback);\r\n    }\r\n    else {\r\n        content = normalizeSuspenseSlot(children);\r\n        fallback = normalizeVNode(null);\r\n    }\r\n    return {\r\n        content,\r\n        fallback\r\n    };\r\n}\r\nfunction normalizeSuspenseSlot(s) {\r\n    if (isFunction(s)) {\r\n        s = s();\r\n    }\r\n    if (isArray(s)) {\r\n        const singleChild = filterSingleRoot(s);\r\n        if ((process.env.NODE_ENV !== 'production') && !singleChild) {\r\n            warn(`<Suspense> slots expect a single root node.`);\r\n        }\r\n        s = singleChild;\r\n    }\r\n    return normalizeVNode(s);\r\n}\r\nfunction queueEffectWithSuspense(fn, suspense) {\r\n    if (suspense && suspense.pendingBranch) {\r\n        if (isArray(fn)) {\r\n            suspense.effects.push(...fn);\r\n        }\r\n        else {\r\n            suspense.effects.push(fn);\r\n        }\r\n    }\r\n    else {\r\n        queuePostFlushCb(fn);\r\n    }\r\n}\r\nfunction setActiveBranch(suspense, branch) {\r\n    suspense.activeBranch = branch;\r\n    const { vnode, parentComponent } = suspense;\r\n    const el = (vnode.el = branch.el);\r\n    // in case suspense is the root node of a component,\r\n    // recursively update the HOC el\r\n    if (parentComponent && parentComponent.subTree === vnode) {\r\n        parentComponent.vnode.el = el;\r\n        updateHOCHostEl(parentComponent, el);\r\n    }\r\n}\n\nfunction initProps(instance, rawProps, isStateful, // result of bitwise flag comparison\r\nisSSR = false) {\r\n    const props = {};\r\n    const attrs = {};\r\n    def(attrs, InternalObjectKey, 1);\r\n    instance.propsDefaults = Object.create(null);\r\n    setFullProps(instance, rawProps, props, attrs);\r\n    // validation\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        validateProps(rawProps || {}, props, instance);\r\n    }\r\n    if (isStateful) {\r\n        // stateful\r\n        instance.props = isSSR ? props : shallowReactive(props);\r\n    }\r\n    else {\r\n        if (!instance.type.props) {\r\n            // functional w/ optional props, props === attrs\r\n            instance.props = attrs;\r\n        }\r\n        else {\r\n            // functional w/ declared props\r\n            instance.props = props;\r\n        }\r\n    }\r\n    instance.attrs = attrs;\r\n}\r\nfunction updateProps(instance, rawProps, rawPrevProps, optimized) {\r\n    const { props, attrs, vnode: { patchFlag } } = instance;\r\n    const rawCurrentProps = toRaw(props);\r\n    const [options] = instance.propsOptions;\r\n    if (\r\n    // always force full diff in dev\r\n    // - #1942 if hmr is enabled with sfc component\r\n    // - vite#872 non-sfc component used by sfc component\r\n    !((process.env.NODE_ENV !== 'production') &&\r\n        (instance.type.__hmrId ||\r\n            (instance.parent && instance.parent.type.__hmrId))) &&\r\n        (optimized || patchFlag > 0) &&\r\n        !(patchFlag & 16 /* FULL_PROPS */)) {\r\n        if (patchFlag & 8 /* PROPS */) {\r\n            // Compiler-generated props & no keys change, just set the updated\r\n            // the props.\r\n            const propsToUpdate = instance.vnode.dynamicProps;\r\n            for (let i = 0; i < propsToUpdate.length; i++) {\r\n                const key = propsToUpdate[i];\r\n                // PROPS flag guarantees rawProps to be non-null\r\n                const value = rawProps[key];\r\n                if (options) {\r\n                    // attr / props separation was done on init and will be consistent\r\n                    // in this code path, so just check if attrs have it.\r\n                    if (hasOwn(attrs, key)) {\r\n                        attrs[key] = value;\r\n                    }\r\n                    else {\r\n                        const camelizedKey = camelize(key);\r\n                        props[camelizedKey] = resolvePropValue(options, rawCurrentProps, camelizedKey, value, instance);\r\n                    }\r\n                }\r\n                else {\r\n                    attrs[key] = value;\r\n                }\r\n            }\r\n        }\r\n    }\r\n    else {\r\n        // full props update.\r\n        setFullProps(instance, rawProps, props, attrs);\r\n        // in case of dynamic props, check if we need to delete keys from\r\n        // the props object\r\n        let kebabKey;\r\n        for (const key in rawCurrentProps) {\r\n            if (!rawProps ||\r\n                // for camelCase\r\n                (!hasOwn(rawProps, key) &&\r\n                    // it's possible the original props was passed in as kebab-case\r\n                    // and converted to camelCase (#955)\r\n                    ((kebabKey = hyphenate(key)) === key || !hasOwn(rawProps, kebabKey)))) {\r\n                if (options) {\r\n                    if (rawPrevProps &&\r\n                        // for camelCase\r\n                        (rawPrevProps[key] !== undefined ||\r\n                            // for kebab-case\r\n                            rawPrevProps[kebabKey] !== undefined)) {\r\n                        props[key] = resolvePropValue(options, rawProps || EMPTY_OBJ, key, undefined, instance);\r\n                    }\r\n                }\r\n                else {\r\n                    delete props[key];\r\n                }\r\n            }\r\n        }\r\n        // in the case of functional component w/o props declaration, props and\r\n        // attrs point to the same object so it should already have been updated.\r\n        if (attrs !== rawCurrentProps) {\r\n            for (const key in attrs) {\r\n                if (!rawProps || !hasOwn(rawProps, key)) {\r\n                    delete attrs[key];\r\n                }\r\n            }\r\n        }\r\n    }\r\n    // trigger updates for $attrs in case it's used in component slots\r\n    trigger(instance, \"set\" /* SET */, '$attrs');\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        validateProps(rawProps || {}, props, instance);\r\n    }\r\n}\r\nfunction setFullProps(instance, rawProps, props, attrs) {\r\n    const [options, needCastKeys] = instance.propsOptions;\r\n    if (rawProps) {\r\n        for (const key in rawProps) {\r\n            const value = rawProps[key];\r\n            // key, ref are reserved and never passed down\r\n            if (isReservedProp(key)) {\r\n                continue;\r\n            }\r\n            // prop option names are camelized during normalization, so to support\r\n            // kebab -> camel conversion here we need to camelize the key.\r\n            let camelKey;\r\n            if (options && hasOwn(options, (camelKey = camelize(key)))) {\r\n                props[camelKey] = value;\r\n            }\r\n            else if (!isEmitListener(instance.emitsOptions, key)) {\r\n                // Any non-declared (either as a prop or an emitted event) props are put\r\n                // into a separate `attrs` object for spreading. Make sure to preserve\r\n                // original key casing\r\n                attrs[key] = value;\r\n            }\r\n        }\r\n    }\r\n    if (needCastKeys) {\r\n        const rawCurrentProps = toRaw(props);\r\n        for (let i = 0; i < needCastKeys.length; i++) {\r\n            const key = needCastKeys[i];\r\n            props[key] = resolvePropValue(options, rawCurrentProps, key, rawCurrentProps[key], instance);\r\n        }\r\n    }\r\n}\r\nfunction resolvePropValue(options, props, key, value, instance) {\r\n    const opt = options[key];\r\n    if (opt != null) {\r\n        const hasDefault = hasOwn(opt, 'default');\r\n        // default values\r\n        if (hasDefault && value === undefined) {\r\n            const defaultValue = opt.default;\r\n            if (opt.type !== Function && isFunction(defaultValue)) {\r\n                const { propsDefaults } = instance;\r\n                if (key in propsDefaults) {\r\n                    value = propsDefaults[key];\r\n                }\r\n                else {\r\n                    setCurrentInstance(instance);\r\n                    value = propsDefaults[key] = defaultValue(props);\r\n                    setCurrentInstance(null);\r\n                }\r\n            }\r\n            else {\r\n                value = defaultValue;\r\n            }\r\n        }\r\n        // boolean casting\r\n        if (opt[0 /* shouldCast */]) {\r\n            if (!hasOwn(props, key) && !hasDefault) {\r\n                value = false;\r\n            }\r\n            else if (opt[1 /* shouldCastTrue */] &&\r\n                (value === '' || value === hyphenate(key))) {\r\n                value = true;\r\n            }\r\n        }\r\n    }\r\n    return value;\r\n}\r\nfunction normalizePropsOptions(comp, appContext, asMixin = false) {\r\n    if (!appContext.deopt && comp.__props) {\r\n        return comp.__props;\r\n    }\r\n    const raw = comp.props;\r\n    const normalized = {};\r\n    const needCastKeys = [];\r\n    // apply mixin/extends props\r\n    let hasExtends = false;\r\n    if (__VUE_OPTIONS_API__ && !isFunction(comp)) {\r\n        const extendProps = (raw) => {\r\n            hasExtends = true;\r\n            const [props, keys] = normalizePropsOptions(raw, appContext, true);\r\n            extend(normalized, props);\r\n            if (keys)\r\n                needCastKeys.push(...keys);\r\n        };\r\n        if (!asMixin && appContext.mixins.length) {\r\n            appContext.mixins.forEach(extendProps);\r\n        }\r\n        if (comp.extends) {\r\n            extendProps(comp.extends);\r\n        }\r\n        if (comp.mixins) {\r\n            comp.mixins.forEach(extendProps);\r\n        }\r\n    }\r\n    if (!raw && !hasExtends) {\r\n        return (comp.__props = EMPTY_ARR);\r\n    }\r\n    if (isArray(raw)) {\r\n        for (let i = 0; i < raw.length; i++) {\r\n            if ((process.env.NODE_ENV !== 'production') && !isString(raw[i])) {\r\n                warn(`props must be strings when using array syntax.`, raw[i]);\r\n            }\r\n            const normalizedKey = camelize(raw[i]);\r\n            if (validatePropName(normalizedKey)) {\r\n                normalized[normalizedKey] = EMPTY_OBJ;\r\n            }\r\n        }\r\n    }\r\n    else if (raw) {\r\n        if ((process.env.NODE_ENV !== 'production') && !isObject(raw)) {\r\n            warn(`invalid props options`, raw);\r\n        }\r\n        for (const key in raw) {\r\n            const normalizedKey = camelize(key);\r\n            if (validatePropName(normalizedKey)) {\r\n                const opt = raw[key];\r\n                const prop = (normalized[normalizedKey] =\r\n                    isArray(opt) || isFunction(opt) ? { type: opt } : opt);\r\n                if (prop) {\r\n                    const booleanIndex = getTypeIndex(Boolean, prop.type);\r\n                    const stringIndex = getTypeIndex(String, prop.type);\r\n                    prop[0 /* shouldCast */] = booleanIndex > -1;\r\n                    prop[1 /* shouldCastTrue */] =\r\n                        stringIndex < 0 || booleanIndex < stringIndex;\r\n                    // if the prop needs boolean casting or default value\r\n                    if (booleanIndex > -1 || hasOwn(prop, 'default')) {\r\n                        needCastKeys.push(normalizedKey);\r\n                    }\r\n                }\r\n            }\r\n        }\r\n    }\r\n    return (comp.__props = [normalized, needCastKeys]);\r\n}\r\nfunction validatePropName(key) {\r\n    if (key[0] !== '$') {\r\n        return true;\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        warn(`Invalid prop name: \"${key}\" is a reserved property.`);\r\n    }\r\n    return false;\r\n}\r\n// use function string name to check type constructors\r\n// so that it works across vms / iframes.\r\nfunction getType(ctor) {\r\n    const match = ctor && ctor.toString().match(/^\\s*function (\\w+)/);\r\n    return match ? match[1] : '';\r\n}\r\nfunction isSameType(a, b) {\r\n    return getType(a) === getType(b);\r\n}\r\nfunction getTypeIndex(type, expectedTypes) {\r\n    if (isArray(expectedTypes)) {\r\n        return expectedTypes.findIndex(t => isSameType(t, type));\r\n    }\r\n    else if (isFunction(expectedTypes)) {\r\n        return isSameType(expectedTypes, type) ? 0 : -1;\r\n    }\r\n    return -1;\r\n}\r\n/**\r\n * dev only\r\n */\r\nfunction validateProps(rawProps, props, instance) {\r\n    const resolvedValues = toRaw(props);\r\n    const options = instance.propsOptions[0];\r\n    for (const key in options) {\r\n        let opt = options[key];\r\n        if (opt == null)\r\n            continue;\r\n        validateProp(key, resolvedValues[key], opt, !hasOwn(rawProps, key) && !hasOwn(rawProps, hyphenate(key)));\r\n    }\r\n}\r\n/**\r\n * dev only\r\n */\r\nfunction validateProp(name, value, prop, isAbsent) {\r\n    const { type, required, validator } = prop;\r\n    // required!\r\n    if (required && isAbsent) {\r\n        warn('Missing required prop: \"' + name + '\"');\r\n        return;\r\n    }\r\n    // missing but optional\r\n    if (value == null && !prop.required) {\r\n        return;\r\n    }\r\n    // type check\r\n    if (type != null && type !== true) {\r\n        let isValid = false;\r\n        const types = isArray(type) ? type : [type];\r\n        const expectedTypes = [];\r\n        // value is valid as long as one of the specified types match\r\n        for (let i = 0; i < types.length && !isValid; i++) {\r\n            const { valid, expectedType } = assertType(value, types[i]);\r\n            expectedTypes.push(expectedType || '');\r\n            isValid = valid;\r\n        }\r\n        if (!isValid) {\r\n            warn(getInvalidTypeMessage(name, value, expectedTypes));\r\n            return;\r\n        }\r\n    }\r\n    // custom validator\r\n    if (validator && !validator(value)) {\r\n        warn('Invalid prop: custom validator check failed for prop \"' + name + '\".');\r\n    }\r\n}\r\nconst isSimpleType = /*#__PURE__*/ makeMap('String,Number,Boolean,Function,Symbol,BigInt');\r\n/**\r\n * dev only\r\n */\r\nfunction assertType(value, type) {\r\n    let valid;\r\n    const expectedType = getType(type);\r\n    if (isSimpleType(expectedType)) {\r\n        const t = typeof value;\r\n        valid = t === expectedType.toLowerCase();\r\n        // for primitive wrapper objects\r\n        if (!valid && t === 'object') {\r\n            valid = value instanceof type;\r\n        }\r\n    }\r\n    else if (expectedType === 'Object') {\r\n        valid = isObject(value);\r\n    }\r\n    else if (expectedType === 'Array') {\r\n        valid = isArray(value);\r\n    }\r\n    else {\r\n        valid = value instanceof type;\r\n    }\r\n    return {\r\n        valid,\r\n        expectedType\r\n    };\r\n}\r\n/**\r\n * dev only\r\n */\r\nfunction getInvalidTypeMessage(name, value, expectedTypes) {\r\n    let message = `Invalid prop: type check failed for prop \"${name}\".` +\r\n        ` Expected ${expectedTypes.map(capitalize).join(', ')}`;\r\n    const expectedType = expectedTypes[0];\r\n    const receivedType = toRawType(value);\r\n    const expectedValue = styleValue(value, expectedType);\r\n    const receivedValue = styleValue(value, receivedType);\r\n    // check if we need to specify expected value\r\n    if (expectedTypes.length === 1 &&\r\n        isExplicable(expectedType) &&\r\n        !isBoolean(expectedType, receivedType)) {\r\n        message += ` with value ${expectedValue}`;\r\n    }\r\n    message += `, got ${receivedType} `;\r\n    // check if we need to specify received value\r\n    if (isExplicable(receivedType)) {\r\n        message += `with value ${receivedValue}.`;\r\n    }\r\n    return message;\r\n}\r\n/**\r\n * dev only\r\n */\r\nfunction styleValue(value, type) {\r\n    if (type === 'String') {\r\n        return `\"${value}\"`;\r\n    }\r\n    else if (type === 'Number') {\r\n        return `${Number(value)}`;\r\n    }\r\n    else {\r\n        return `${value}`;\r\n    }\r\n}\r\n/**\r\n * dev only\r\n */\r\nfunction isExplicable(type) {\r\n    const explicitTypes = ['string', 'number', 'boolean'];\r\n    return explicitTypes.some(elem => type.toLowerCase() === elem);\r\n}\r\n/**\r\n * dev only\r\n */\r\nfunction isBoolean(...args) {\r\n    return args.some(elem => elem.toLowerCase() === 'boolean');\r\n}\n\nfunction injectHook(type, hook, target = currentInstance, prepend = false) {\r\n    if (target) {\r\n        const hooks = target[type] || (target[type] = []);\r\n        // cache the error handling wrapper for injected hooks so the same hook\r\n        // can be properly deduped by the scheduler. \"__weh\" stands for \"with error\r\n        // handling\".\r\n        const wrappedHook = hook.__weh ||\r\n            (hook.__weh = (...args) => {\r\n                if (target.isUnmounted) {\r\n                    return;\r\n                }\r\n                // disable tracking inside all lifecycle hooks\r\n                // since they can potentially be called inside effects.\r\n                pauseTracking();\r\n                // Set currentInstance during hook invocation.\r\n                // This assumes the hook does not synchronously trigger other hooks, which\r\n                // can only be false when the user does something really funky.\r\n                setCurrentInstance(target);\r\n                const res = callWithAsyncErrorHandling(hook, target, type, args);\r\n                setCurrentInstance(null);\r\n                resetTracking();\r\n                return res;\r\n            });\r\n        if (prepend) {\r\n            hooks.unshift(wrappedHook);\r\n        }\r\n        else {\r\n            hooks.push(wrappedHook);\r\n        }\r\n        return wrappedHook;\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        const apiName = toHandlerKey(ErrorTypeStrings[type].replace(/ hook$/, ''));\r\n        warn(`${apiName} is called when there is no active component instance to be ` +\r\n            `associated with. ` +\r\n            `Lifecycle injection APIs can only be used during execution of setup().` +\r\n            (` If you are using async setup(), make sure to register lifecycle ` +\r\n                    `hooks before the first await statement.`\r\n                ));\r\n    }\r\n}\r\nconst createHook = (lifecycle) => (hook, target = currentInstance) => \r\n// post-create lifecycle registrations are noops during SSR\r\n!isInSSRComponentSetup && injectHook(lifecycle, hook, target);\r\nconst onBeforeMount = createHook(\"bm\" /* BEFORE_MOUNT */);\r\nconst onMounted = createHook(\"m\" /* MOUNTED */);\r\nconst onBeforeUpdate = createHook(\"bu\" /* BEFORE_UPDATE */);\r\nconst onUpdated = createHook(\"u\" /* UPDATED */);\r\nconst onBeforeUnmount = createHook(\"bum\" /* BEFORE_UNMOUNT */);\r\nconst onUnmounted = createHook(\"um\" /* UNMOUNTED */);\r\nconst onRenderTriggered = createHook(\"rtg\" /* RENDER_TRIGGERED */);\r\nconst onRenderTracked = createHook(\"rtc\" /* RENDER_TRACKED */);\r\nconst onErrorCaptured = (hook, target = currentInstance) => {\r\n    injectHook(\"ec\" /* ERROR_CAPTURED */, hook, target);\r\n};\n\n// Simple effect.\r\nfunction watchEffect(effect, options) {\r\n    return doWatch(effect, null, options);\r\n}\r\n// initial value for watchers to trigger on undefined initial values\r\nconst INITIAL_WATCHER_VALUE = {};\r\n// implementation\r\nfunction watch(source, cb, options) {\r\n    if ((process.env.NODE_ENV !== 'production') && !isFunction(cb)) {\r\n        warn(`\\`watch(fn, options?)\\` signature has been moved to a separate API. ` +\r\n            `Use \\`watchEffect(fn, options?)\\` instead. \\`watch\\` now only ` +\r\n            `supports \\`watch(source, cb, options?) signature.`);\r\n    }\r\n    return doWatch(source, cb, options);\r\n}\r\nfunction doWatch(source, cb, { immediate, deep, flush, onTrack, onTrigger } = EMPTY_OBJ, instance = currentInstance) {\r\n    if ((process.env.NODE_ENV !== 'production') && !cb) {\r\n        if (immediate !== undefined) {\r\n            warn(`watch() \"immediate\" option is only respected when using the ` +\r\n                `watch(source, callback, options?) signature.`);\r\n        }\r\n        if (deep !== undefined) {\r\n            warn(`watch() \"deep\" option is only respected when using the ` +\r\n                `watch(source, callback, options?) signature.`);\r\n        }\r\n    }\r\n    const warnInvalidSource = (s) => {\r\n        warn(`Invalid watch source: `, s, `A watch source can only be a getter/effect function, a ref, ` +\r\n            `a reactive object, or an array of these types.`);\r\n    };\r\n    let getter;\r\n    let forceTrigger = false;\r\n    if (isRef(source)) {\r\n        getter = () => source.value;\r\n        forceTrigger = !!source._shallow;\r\n    }\r\n    else if (isReactive(source)) {\r\n        getter = () => source;\r\n        deep = true;\r\n    }\r\n    else if (isArray(source)) {\r\n        getter = () => source.map(s => {\r\n            if (isRef(s)) {\r\n                return s.value;\r\n            }\r\n            else if (isReactive(s)) {\r\n                return traverse(s);\r\n            }\r\n            else if (isFunction(s)) {\r\n                return callWithErrorHandling(s, instance, 2 /* WATCH_GETTER */, [\r\n                    instance && instance.proxy\r\n                ]);\r\n            }\r\n            else {\r\n                (process.env.NODE_ENV !== 'production') && warnInvalidSource(s);\r\n            }\r\n        });\r\n    }\r\n    else if (isFunction(source)) {\r\n        if (cb) {\r\n            // getter with cb\r\n            getter = () => callWithErrorHandling(source, instance, 2 /* WATCH_GETTER */, [\r\n                instance && instance.proxy\r\n            ]);\r\n        }\r\n        else {\r\n            // no cb -> simple effect\r\n            getter = () => {\r\n                if (instance && instance.isUnmounted) {\r\n                    return;\r\n                }\r\n                if (cleanup) {\r\n                    cleanup();\r\n                }\r\n                return callWithAsyncErrorHandling(source, instance, 3 /* WATCH_CALLBACK */, [onInvalidate]);\r\n            };\r\n        }\r\n    }\r\n    else {\r\n        getter = NOOP;\r\n        (process.env.NODE_ENV !== 'production') && warnInvalidSource(source);\r\n    }\r\n    if (cb && deep) {\r\n        const baseGetter = getter;\r\n        getter = () => traverse(baseGetter());\r\n    }\r\n    let cleanup;\r\n    let onInvalidate = (fn) => {\r\n        cleanup = runner.options.onStop = () => {\r\n            callWithErrorHandling(fn, instance, 4 /* WATCH_CLEANUP */);\r\n        };\r\n    };\r\n    let oldValue = isArray(source) ? [] : INITIAL_WATCHER_VALUE;\r\n    const job = () => {\r\n        if (!runner.active) {\r\n            return;\r\n        }\r\n        if (cb) {\r\n            // watch(source, cb)\r\n            const newValue = runner();\r\n            if (deep || forceTrigger || hasChanged(newValue, oldValue)) {\r\n                // cleanup before running cb again\r\n                if (cleanup) {\r\n                    cleanup();\r\n                }\r\n                callWithAsyncErrorHandling(cb, instance, 3 /* WATCH_CALLBACK */, [\r\n                    newValue,\r\n                    // pass undefined as the old value when it's changed for the first time\r\n                    oldValue === INITIAL_WATCHER_VALUE ? undefined : oldValue,\r\n                    onInvalidate\r\n                ]);\r\n                oldValue = newValue;\r\n            }\r\n        }\r\n        else {\r\n            // watchEffect\r\n            runner();\r\n        }\r\n    };\r\n    // important: mark the job as a watcher callback so that scheduler knows\r\n    // it is allowed to self-trigger (#1727)\r\n    job.allowRecurse = !!cb;\r\n    let scheduler;\r\n    if (flush === 'sync') {\r\n        scheduler = job;\r\n    }\r\n    else if (flush === 'post') {\r\n        scheduler = () => queuePostRenderEffect(job, instance && instance.suspense);\r\n    }\r\n    else {\r\n        // default: 'pre'\r\n        scheduler = () => {\r\n            if (!instance || instance.isMounted) {\r\n                queuePreFlushCb(job);\r\n            }\r\n            else {\r\n                // with 'pre' option, the first call must happen before\r\n                // the component is mounted so it is called synchronously.\r\n                job();\r\n            }\r\n        };\r\n    }\r\n    const runner = effect(getter, {\r\n        lazy: true,\r\n        onTrack,\r\n        onTrigger,\r\n        scheduler\r\n    });\r\n    recordInstanceBoundEffect(runner, instance);\r\n    // initial run\r\n    if (cb) {\r\n        if (immediate) {\r\n            job();\r\n        }\r\n        else {\r\n            oldValue = runner();\r\n        }\r\n    }\r\n    else if (flush === 'post') {\r\n        queuePostRenderEffect(runner, instance && instance.suspense);\r\n    }\r\n    else {\r\n        runner();\r\n    }\r\n    return () => {\r\n        stop(runner);\r\n        if (instance) {\r\n            remove(instance.effects, runner);\r\n        }\r\n    };\r\n}\r\n// this.$watch\r\nfunction instanceWatch(source, cb, options) {\r\n    const publicThis = this.proxy;\r\n    const getter = isString(source)\r\n        ? () => publicThis[source]\r\n        : source.bind(publicThis);\r\n    return doWatch(getter, cb.bind(publicThis), options, this);\r\n}\r\nfunction traverse(value, seen = new Set()) {\r\n    if (!isObject(value) || seen.has(value)) {\r\n        return value;\r\n    }\r\n    seen.add(value);\r\n    if (isRef(value)) {\r\n        traverse(value.value, seen);\r\n    }\r\n    else if (isArray(value)) {\r\n        for (let i = 0; i < value.length; i++) {\r\n            traverse(value[i], seen);\r\n        }\r\n    }\r\n    else if (isSet(value) || isMap(value)) {\r\n        value.forEach((v) => {\r\n            traverse(v, seen);\r\n        });\r\n    }\r\n    else {\r\n        for (const key in value) {\r\n            traverse(value[key], seen);\r\n        }\r\n    }\r\n    return value;\r\n}\n\nfunction useTransitionState() {\r\n    const state = {\r\n        isMounted: false,\r\n        isLeaving: false,\r\n        isUnmounting: false,\r\n        leavingVNodes: new Map()\r\n    };\r\n    onMounted(() => {\r\n        state.isMounted = true;\r\n    });\r\n    onBeforeUnmount(() => {\r\n        state.isUnmounting = true;\r\n    });\r\n    return state;\r\n}\r\nconst TransitionHookValidator = [Function, Array];\r\nconst BaseTransitionImpl = {\r\n    name: `BaseTransition`,\r\n    props: {\r\n        mode: String,\r\n        appear: Boolean,\r\n        persisted: Boolean,\r\n        // enter\r\n        onBeforeEnter: TransitionHookValidator,\r\n        onEnter: TransitionHookValidator,\r\n        onAfterEnter: TransitionHookValidator,\r\n        onEnterCancelled: TransitionHookValidator,\r\n        // leave\r\n        onBeforeLeave: TransitionHookValidator,\r\n        onLeave: TransitionHookValidator,\r\n        onAfterLeave: TransitionHookValidator,\r\n        onLeaveCancelled: TransitionHookValidator,\r\n        // appear\r\n        onBeforeAppear: TransitionHookValidator,\r\n        onAppear: TransitionHookValidator,\r\n        onAfterAppear: TransitionHookValidator,\r\n        onAppearCancelled: TransitionHookValidator\r\n    },\r\n    setup(props, { slots }) {\r\n        const instance = getCurrentInstance();\r\n        const state = useTransitionState();\r\n        let prevTransitionKey;\r\n        return () => {\r\n            const children = slots.default && getTransitionRawChildren(slots.default(), true);\r\n            if (!children || !children.length) {\r\n                return;\r\n            }\r\n            // warn multiple elements\r\n            if ((process.env.NODE_ENV !== 'production') && children.length > 1) {\r\n                warn('<transition> can only be used on a single element or component. Use ' +\r\n                    '<transition-group> for lists.');\r\n            }\r\n            // there's no need to track reactivity for these props so use the raw\r\n            // props for a bit better perf\r\n            const rawProps = toRaw(props);\r\n            const { mode } = rawProps;\r\n            // check mode\r\n            if ((process.env.NODE_ENV !== 'production') && mode && !['in-out', 'out-in', 'default'].includes(mode)) {\r\n                warn(`invalid <transition> mode: ${mode}`);\r\n            }\r\n            // at this point children has a guaranteed length of 1.\r\n            const child = children[0];\r\n            if (state.isLeaving) {\r\n                return emptyPlaceholder(child);\r\n            }\r\n            // in the case of <transition><keep-alive/></transition>, we need to\r\n            // compare the type of the kept-alive children.\r\n            const innerChild = getKeepAliveChild(child);\r\n            if (!innerChild) {\r\n                return emptyPlaceholder(child);\r\n            }\r\n            const enterHooks = resolveTransitionHooks(innerChild, rawProps, state, instance);\r\n            setTransitionHooks(innerChild, enterHooks);\r\n            const oldChild = instance.subTree;\r\n            const oldInnerChild = oldChild && getKeepAliveChild(oldChild);\r\n            let transitionKeyChanged = false;\r\n            const { getTransitionKey } = innerChild.type;\r\n            if (getTransitionKey) {\r\n                const key = getTransitionKey();\r\n                if (prevTransitionKey === undefined) {\r\n                    prevTransitionKey = key;\r\n                }\r\n                else if (key !== prevTransitionKey) {\r\n                    prevTransitionKey = key;\r\n                    transitionKeyChanged = true;\r\n                }\r\n            }\r\n            // handle mode\r\n            if (oldInnerChild &&\r\n                oldInnerChild.type !== Comment &&\r\n                (!isSameVNodeType(innerChild, oldInnerChild) || transitionKeyChanged)) {\r\n                const leavingHooks = resolveTransitionHooks(oldInnerChild, rawProps, state, instance);\r\n                // update old tree's hooks in case of dynamic transition\r\n                setTransitionHooks(oldInnerChild, leavingHooks);\r\n                // switching between different views\r\n                if (mode === 'out-in') {\r\n                    state.isLeaving = true;\r\n                    // return placeholder node and queue update when leave finishes\r\n                    leavingHooks.afterLeave = () => {\r\n                        state.isLeaving = false;\r\n                        instance.update();\r\n                    };\r\n                    return emptyPlaceholder(child);\r\n                }\r\n                else if (mode === 'in-out' && innerChild.type !== Comment) {\r\n                    leavingHooks.delayLeave = (el, earlyRemove, delayedLeave) => {\r\n                        const leavingVNodesCache = getLeavingNodesForType(state, oldInnerChild);\r\n                        leavingVNodesCache[String(oldInnerChild.key)] = oldInnerChild;\r\n                        // early removal callback\r\n                        el._leaveCb = () => {\r\n                            earlyRemove();\r\n                            el._leaveCb = undefined;\r\n                            delete enterHooks.delayedLeave;\r\n                        };\r\n                        enterHooks.delayedLeave = delayedLeave;\r\n                    };\r\n                }\r\n            }\r\n            return child;\r\n        };\r\n    }\r\n};\r\n// export the public type for h/tsx inference\r\n// also to avoid inline import() in generated d.ts files\r\nconst BaseTransition = BaseTransitionImpl;\r\nfunction getLeavingNodesForType(state, vnode) {\r\n    const { leavingVNodes } = state;\r\n    let leavingVNodesCache = leavingVNodes.get(vnode.type);\r\n    if (!leavingVNodesCache) {\r\n        leavingVNodesCache = Object.create(null);\r\n        leavingVNodes.set(vnode.type, leavingVNodesCache);\r\n    }\r\n    return leavingVNodesCache;\r\n}\r\n// The transition hooks are attached to the vnode as vnode.transition\r\n// and will be called at appropriate timing in the renderer.\r\nfunction resolveTransitionHooks(vnode, props, state, instance) {\r\n    const { appear, mode, persisted = false, onBeforeEnter, onEnter, onAfterEnter, onEnterCancelled, onBeforeLeave, onLeave, onAfterLeave, onLeaveCancelled, onBeforeAppear, onAppear, onAfterAppear, onAppearCancelled } = props;\r\n    const key = String(vnode.key);\r\n    const leavingVNodesCache = getLeavingNodesForType(state, vnode);\r\n    const callHook = (hook, args) => {\r\n        hook &&\r\n            callWithAsyncErrorHandling(hook, instance, 9 /* TRANSITION_HOOK */, args);\r\n    };\r\n    const hooks = {\r\n        mode,\r\n        persisted,\r\n        beforeEnter(el) {\r\n            let hook = onBeforeEnter;\r\n            if (!state.isMounted) {\r\n                if (appear) {\r\n                    hook = onBeforeAppear || onBeforeEnter;\r\n                }\r\n                else {\r\n                    return;\r\n                }\r\n            }\r\n            // for same element (v-show)\r\n            if (el._leaveCb) {\r\n                el._leaveCb(true /* cancelled */);\r\n            }\r\n            // for toggled element with same key (v-if)\r\n            const leavingVNode = leavingVNodesCache[key];\r\n            if (leavingVNode &&\r\n                isSameVNodeType(vnode, leavingVNode) &&\r\n                leavingVNode.el._leaveCb) {\r\n                // force early removal (not cancelled)\r\n                leavingVNode.el._leaveCb();\r\n            }\r\n            callHook(hook, [el]);\r\n        },\r\n        enter(el) {\r\n            let hook = onEnter;\r\n            let afterHook = onAfterEnter;\r\n            let cancelHook = onEnterCancelled;\r\n            if (!state.isMounted) {\r\n                if (appear) {\r\n                    hook = onAppear || onEnter;\r\n                    afterHook = onAfterAppear || onAfterEnter;\r\n                    cancelHook = onAppearCancelled || onEnterCancelled;\r\n                }\r\n                else {\r\n                    return;\r\n                }\r\n            }\r\n            let called = false;\r\n            const done = (el._enterCb = (cancelled) => {\r\n                if (called)\r\n                    return;\r\n                called = true;\r\n                if (cancelled) {\r\n                    callHook(cancelHook, [el]);\r\n                }\r\n                else {\r\n                    callHook(afterHook, [el]);\r\n                }\r\n                if (hooks.delayedLeave) {\r\n                    hooks.delayedLeave();\r\n                }\r\n                el._enterCb = undefined;\r\n            });\r\n            if (hook) {\r\n                hook(el, done);\r\n                if (hook.length <= 1) {\r\n                    done();\r\n                }\r\n            }\r\n            else {\r\n                done();\r\n            }\r\n        },\r\n        leave(el, remove) {\r\n            const key = String(vnode.key);\r\n            if (el._enterCb) {\r\n                el._enterCb(true /* cancelled */);\r\n            }\r\n            if (state.isUnmounting) {\r\n                return remove();\r\n            }\r\n            callHook(onBeforeLeave, [el]);\r\n            let called = false;\r\n            const done = (el._leaveCb = (cancelled) => {\r\n                if (called)\r\n                    return;\r\n                called = true;\r\n                remove();\r\n                if (cancelled) {\r\n                    callHook(onLeaveCancelled, [el]);\r\n                }\r\n                else {\r\n                    callHook(onAfterLeave, [el]);\r\n                }\r\n                el._leaveCb = undefined;\r\n                if (leavingVNodesCache[key] === vnode) {\r\n                    delete leavingVNodesCache[key];\r\n                }\r\n            });\r\n            leavingVNodesCache[key] = vnode;\r\n            if (onLeave) {\r\n                onLeave(el, done);\r\n                if (onLeave.length <= 1) {\r\n                    done();\r\n                }\r\n            }\r\n            else {\r\n                done();\r\n            }\r\n        },\r\n        clone(vnode) {\r\n            return resolveTransitionHooks(vnode, props, state, instance);\r\n        }\r\n    };\r\n    return hooks;\r\n}\r\n// the placeholder really only handles one special case: KeepAlive\r\n// in the case of a KeepAlive in a leave phase we need to return a KeepAlive\r\n// placeholder with empty content to avoid the KeepAlive instance from being\r\n// unmounted.\r\nfunction emptyPlaceholder(vnode) {\r\n    if (isKeepAlive(vnode)) {\r\n        vnode = cloneVNode(vnode);\r\n        vnode.children = null;\r\n        return vnode;\r\n    }\r\n}\r\nfunction getKeepAliveChild(vnode) {\r\n    return isKeepAlive(vnode)\r\n        ? vnode.children\r\n            ? vnode.children[0]\r\n            : undefined\r\n        : vnode;\r\n}\r\nfunction setTransitionHooks(vnode, hooks) {\r\n    if (vnode.shapeFlag & 6 /* COMPONENT */ && vnode.component) {\r\n        setTransitionHooks(vnode.component.subTree, hooks);\r\n    }\r\n    else if (vnode.shapeFlag & 128 /* SUSPENSE */) {\r\n        vnode.ssContent.transition = hooks.clone(vnode.ssContent);\r\n        vnode.ssFallback.transition = hooks.clone(vnode.ssFallback);\r\n    }\r\n    else {\r\n        vnode.transition = hooks;\r\n    }\r\n}\r\nfunction getTransitionRawChildren(children, keepComment = false) {\r\n    let ret = [];\r\n    let keyedFragmentCount = 0;\r\n    for (let i = 0; i < children.length; i++) {\r\n        const child = children[i];\r\n        // handle fragment children case, e.g. v-for\r\n        if (child.type === Fragment) {\r\n            if (child.patchFlag & 128 /* KEYED_FRAGMENT */)\r\n                keyedFragmentCount++;\r\n            ret = ret.concat(getTransitionRawChildren(child.children, keepComment));\r\n        }\r\n        // comment placeholders should be skipped, e.g. v-if\r\n        else if (keepComment || child.type !== Comment) {\r\n            ret.push(child);\r\n        }\r\n    }\r\n    // #1126 if a transition children list contains multiple sub fragments, these\r\n    // fragments will be merged into a flat children array. Since each v-for\r\n    // fragment may contain different static bindings inside, we need to de-op\r\n    // these children to force full diffs to ensure correct behavior.\r\n    if (keyedFragmentCount > 1) {\r\n        for (let i = 0; i < ret.length; i++) {\r\n            ret[i].patchFlag = -2 /* BAIL */;\r\n        }\r\n    }\r\n    return ret;\r\n}\n\nconst isKeepAlive = (vnode) => vnode.type.__isKeepAlive;\r\nconst KeepAliveImpl = {\r\n    name: `KeepAlive`,\r\n    // Marker for special handling inside the renderer. We are not using a ===\r\n    // check directly on KeepAlive in the renderer, because importing it directly\r\n    // would prevent it from being tree-shaken.\r\n    __isKeepAlive: true,\r\n    props: {\r\n        include: [String, RegExp, Array],\r\n        exclude: [String, RegExp, Array],\r\n        max: [String, Number]\r\n    },\r\n    setup(props, { slots }) {\r\n        const instance = getCurrentInstance();\r\n        // KeepAlive communicates with the instantiated renderer via the\r\n        // ctx where the renderer passes in its internals,\r\n        // and the KeepAlive instance exposes activate/deactivate implementations.\r\n        // The whole point of this is to avoid importing KeepAlive directly in the\r\n        // renderer to facilitate tree-shaking.\r\n        const sharedContext = instance.ctx;\r\n        // if the internal renderer is not registered, it indicates that this is server-side rendering,\r\n        // for KeepAlive, we just need to render its children\r\n        if (!sharedContext.renderer) {\r\n            return slots.default;\r\n        }\r\n        const cache = new Map();\r\n        const keys = new Set();\r\n        let current = null;\r\n        const parentSuspense = instance.suspense;\r\n        const { renderer: { p: patch, m: move, um: _unmount, o: { createElement } } } = sharedContext;\r\n        const storageContainer = createElement('div');\r\n        sharedContext.activate = (vnode, container, anchor, isSVG, optimized) => {\r\n            const instance = vnode.component;\r\n            move(vnode, container, anchor, 0 /* ENTER */, parentSuspense);\r\n            // in case props have changed\r\n            patch(instance.vnode, vnode, container, anchor, instance, parentSuspense, isSVG, vnode.slotScopeIds, optimized);\r\n            queuePostRenderEffect(() => {\r\n                instance.isDeactivated = false;\r\n                if (instance.a) {\r\n                    invokeArrayFns(instance.a);\r\n                }\r\n                const vnodeHook = vnode.props && vnode.props.onVnodeMounted;\r\n                if (vnodeHook) {\r\n                    invokeVNodeHook(vnodeHook, instance.parent, vnode);\r\n                }\r\n            }, parentSuspense);\r\n        };\r\n        sharedContext.deactivate = (vnode) => {\r\n            const instance = vnode.component;\r\n            move(vnode, storageContainer, null, 1 /* LEAVE */, parentSuspense);\r\n            queuePostRenderEffect(() => {\r\n                if (instance.da) {\r\n                    invokeArrayFns(instance.da);\r\n                }\r\n                const vnodeHook = vnode.props && vnode.props.onVnodeUnmounted;\r\n                if (vnodeHook) {\r\n                    invokeVNodeHook(vnodeHook, instance.parent, vnode);\r\n                }\r\n                instance.isDeactivated = true;\r\n            }, parentSuspense);\r\n        };\r\n        function unmount(vnode) {\r\n            // reset the shapeFlag so it can be properly unmounted\r\n            resetShapeFlag(vnode);\r\n            _unmount(vnode, instance, parentSuspense);\r\n        }\r\n        function pruneCache(filter) {\r\n            cache.forEach((vnode, key) => {\r\n                const name = getComponentName(vnode.type);\r\n                if (name && (!filter || !filter(name))) {\r\n                    pruneCacheEntry(key);\r\n                }\r\n            });\r\n        }\r\n        function pruneCacheEntry(key) {\r\n            const cached = cache.get(key);\r\n            if (!current || cached.type !== current.type) {\r\n                unmount(cached);\r\n            }\r\n            else if (current) {\r\n                // current active instance should no longer be kept-alive.\r\n                // we can't unmount it now but it might be later, so reset its flag now.\r\n                resetShapeFlag(current);\r\n            }\r\n            cache.delete(key);\r\n            keys.delete(key);\r\n        }\r\n        // prune cache on include/exclude prop change\r\n        watch(() => [props.include, props.exclude], ([include, exclude]) => {\r\n            include && pruneCache(name => matches(include, name));\r\n            exclude && pruneCache(name => !matches(exclude, name));\r\n        }, \r\n        // prune post-render after `current` has been updated\r\n        { flush: 'post', deep: true });\r\n        // cache sub tree after render\r\n        let pendingCacheKey = null;\r\n        const cacheSubtree = () => {\r\n            // fix #1621, the pendingCacheKey could be 0\r\n            if (pendingCacheKey != null) {\r\n                cache.set(pendingCacheKey, getInnerChild(instance.subTree));\r\n            }\r\n        };\r\n        onMounted(cacheSubtree);\r\n        onUpdated(cacheSubtree);\r\n        onBeforeUnmount(() => {\r\n            cache.forEach(cached => {\r\n                const { subTree, suspense } = instance;\r\n                const vnode = getInnerChild(subTree);\r\n                if (cached.type === vnode.type) {\r\n                    // current instance will be unmounted as part of keep-alive's unmount\r\n                    resetShapeFlag(vnode);\r\n                    // but invoke its deactivated hook here\r\n                    const da = vnode.component.da;\r\n                    da && queuePostRenderEffect(da, suspense);\r\n                    return;\r\n                }\r\n                unmount(cached);\r\n            });\r\n        });\r\n        return () => {\r\n            pendingCacheKey = null;\r\n            if (!slots.default) {\r\n                return null;\r\n            }\r\n            const children = slots.default();\r\n            const rawVNode = children[0];\r\n            if (children.length > 1) {\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn(`KeepAlive should contain exactly one component child.`);\r\n                }\r\n                current = null;\r\n                return children;\r\n            }\r\n            else if (!isVNode(rawVNode) ||\r\n                (!(rawVNode.shapeFlag & 4 /* STATEFUL_COMPONENT */) &&\r\n                    !(rawVNode.shapeFlag & 128 /* SUSPENSE */))) {\r\n                current = null;\r\n                return rawVNode;\r\n            }\r\n            let vnode = getInnerChild(rawVNode);\r\n            const comp = vnode.type;\r\n            const name = getComponentName(comp);\r\n            const { include, exclude, max } = props;\r\n            if ((include && (!name || !matches(include, name))) ||\r\n                (exclude && name && matches(exclude, name))) {\r\n                current = vnode;\r\n                return rawVNode;\r\n            }\r\n            const key = vnode.key == null ? comp : vnode.key;\r\n            const cachedVNode = cache.get(key);\r\n            // clone vnode if it's reused because we are going to mutate it\r\n            if (vnode.el) {\r\n                vnode = cloneVNode(vnode);\r\n                if (rawVNode.shapeFlag & 128 /* SUSPENSE */) {\r\n                    rawVNode.ssContent = vnode;\r\n                }\r\n            }\r\n            // #1513 it's possible for the returned vnode to be cloned due to attr\r\n            // fallthrough or scopeId, so the vnode here may not be the final vnode\r\n            // that is mounted. Instead of caching it directly, we store the pending\r\n            // key and cache `instance.subTree` (the normalized vnode) in\r\n            // beforeMount/beforeUpdate hooks.\r\n            pendingCacheKey = key;\r\n            if (cachedVNode) {\r\n                // copy over mounted state\r\n                vnode.el = cachedVNode.el;\r\n                vnode.component = cachedVNode.component;\r\n                if (vnode.transition) {\r\n                    // recursively update transition hooks on subTree\r\n                    setTransitionHooks(vnode, vnode.transition);\r\n                }\r\n                // avoid vnode being mounted as fresh\r\n                vnode.shapeFlag |= 512 /* COMPONENT_KEPT_ALIVE */;\r\n                // make this key the freshest\r\n                keys.delete(key);\r\n                keys.add(key);\r\n            }\r\n            else {\r\n                keys.add(key);\r\n                // prune oldest entry\r\n                if (max && keys.size > parseInt(max, 10)) {\r\n                    pruneCacheEntry(keys.values().next().value);\r\n                }\r\n            }\r\n            // avoid vnode being unmounted\r\n            vnode.shapeFlag |= 256 /* COMPONENT_SHOULD_KEEP_ALIVE */;\r\n            current = vnode;\r\n            return rawVNode;\r\n        };\r\n    }\r\n};\r\n// export the public type for h/tsx inference\r\n// also to avoid inline import() in generated d.ts files\r\nconst KeepAlive = KeepAliveImpl;\r\nfunction matches(pattern, name) {\r\n    if (isArray(pattern)) {\r\n        return pattern.some((p) => matches(p, name));\r\n    }\r\n    else if (isString(pattern)) {\r\n        return pattern.split(',').indexOf(name) > -1;\r\n    }\r\n    else if (pattern.test) {\r\n        return pattern.test(name);\r\n    }\r\n    /* istanbul ignore next */\r\n    return false;\r\n}\r\nfunction onActivated(hook, target) {\r\n    registerKeepAliveHook(hook, \"a\" /* ACTIVATED */, target);\r\n}\r\nfunction onDeactivated(hook, target) {\r\n    registerKeepAliveHook(hook, \"da\" /* DEACTIVATED */, target);\r\n}\r\nfunction registerKeepAliveHook(hook, type, target = currentInstance) {\r\n    // cache the deactivate branch check wrapper for injected hooks so the same\r\n    // hook can be properly deduped by the scheduler. \"__wdc\" stands for \"with\r\n    // deactivation check\".\r\n    const wrappedHook = hook.__wdc ||\r\n        (hook.__wdc = () => {\r\n            // only fire the hook if the target instance is NOT in a deactivated branch.\r\n            let current = target;\r\n            while (current) {\r\n                if (current.isDeactivated) {\r\n                    return;\r\n                }\r\n                current = current.parent;\r\n            }\r\n            hook();\r\n        });\r\n    injectHook(type, wrappedHook, target);\r\n    // In addition to registering it on the target instance, we walk up the parent\r\n    // chain and register it on all ancestor instances that are keep-alive roots.\r\n    // This avoids the need to walk the entire component tree when invoking these\r\n    // hooks, and more importantly, avoids the need to track child components in\r\n    // arrays.\r\n    if (target) {\r\n        let current = target.parent;\r\n        while (current && current.parent) {\r\n            if (isKeepAlive(current.parent.vnode)) {\r\n                injectToKeepAliveRoot(wrappedHook, type, target, current);\r\n            }\r\n            current = current.parent;\r\n        }\r\n    }\r\n}\r\nfunction injectToKeepAliveRoot(hook, type, target, keepAliveRoot) {\r\n    // injectHook wraps the original for error handling, so make sure to remove\r\n    // the wrapped version.\r\n    const injected = injectHook(type, hook, keepAliveRoot, true /* prepend */);\r\n    onUnmounted(() => {\r\n        remove(keepAliveRoot[type], injected);\r\n    }, target);\r\n}\r\nfunction resetShapeFlag(vnode) {\r\n    let shapeFlag = vnode.shapeFlag;\r\n    if (shapeFlag & 256 /* COMPONENT_SHOULD_KEEP_ALIVE */) {\r\n        shapeFlag -= 256 /* COMPONENT_SHOULD_KEEP_ALIVE */;\r\n    }\r\n    if (shapeFlag & 512 /* COMPONENT_KEPT_ALIVE */) {\r\n        shapeFlag -= 512 /* COMPONENT_KEPT_ALIVE */;\r\n    }\r\n    vnode.shapeFlag = shapeFlag;\r\n}\r\nfunction getInnerChild(vnode) {\r\n    return vnode.shapeFlag & 128 /* SUSPENSE */ ? vnode.ssContent : vnode;\r\n}\n\nconst isInternalKey = (key) => key[0] === '_' || key === '$stable';\r\nconst normalizeSlotValue = (value) => isArray(value)\r\n    ? value.map(normalizeVNode)\r\n    : [normalizeVNode(value)];\r\nconst normalizeSlot = (key, rawSlot, ctx) => withCtx((props) => {\r\n    if ((process.env.NODE_ENV !== 'production') && currentInstance) {\r\n        warn(`Slot \"${key}\" invoked outside of the render function: ` +\r\n            `this will not track dependencies used in the slot. ` +\r\n            `Invoke the slot function inside the render function instead.`);\r\n    }\r\n    return normalizeSlotValue(rawSlot(props));\r\n}, ctx);\r\nconst normalizeObjectSlots = (rawSlots, slots) => {\r\n    const ctx = rawSlots._ctx;\r\n    for (const key in rawSlots) {\r\n        if (isInternalKey(key))\r\n            continue;\r\n        const value = rawSlots[key];\r\n        if (isFunction(value)) {\r\n            slots[key] = normalizeSlot(key, value, ctx);\r\n        }\r\n        else if (value != null) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                warn(`Non-function value encountered for slot \"${key}\". ` +\r\n                    `Prefer function slots for better performance.`);\r\n            }\r\n            const normalized = normalizeSlotValue(value);\r\n            slots[key] = () => normalized;\r\n        }\r\n    }\r\n};\r\nconst normalizeVNodeSlots = (instance, children) => {\r\n    if ((process.env.NODE_ENV !== 'production') && !isKeepAlive(instance.vnode)) {\r\n        warn(`Non-function value encountered for default slot. ` +\r\n            `Prefer function slots for better performance.`);\r\n    }\r\n    const normalized = normalizeSlotValue(children);\r\n    instance.slots.default = () => normalized;\r\n};\r\nconst initSlots = (instance, children) => {\r\n    if (instance.vnode.shapeFlag & 32 /* SLOTS_CHILDREN */) {\r\n        const type = children._;\r\n        if (type) {\r\n            instance.slots = children;\r\n            // make compiler marker non-enumerable\r\n            def(children, '_', type);\r\n        }\r\n        else {\r\n            normalizeObjectSlots(children, (instance.slots = {}));\r\n        }\r\n    }\r\n    else {\r\n        instance.slots = {};\r\n        if (children) {\r\n            normalizeVNodeSlots(instance, children);\r\n        }\r\n    }\r\n    def(instance.slots, InternalObjectKey, 1);\r\n};\r\nconst updateSlots = (instance, children, optimized) => {\r\n    const { vnode, slots } = instance;\r\n    let needDeletionCheck = true;\r\n    let deletionComparisonTarget = EMPTY_OBJ;\r\n    if (vnode.shapeFlag & 32 /* SLOTS_CHILDREN */) {\r\n        const type = children._;\r\n        if (type) {\r\n            // compiled slots.\r\n            if ((process.env.NODE_ENV !== 'production') && isHmrUpdating) {\r\n                // Parent was HMR updated so slot content may have changed.\r\n                // force update slots and mark instance for hmr as well\r\n                extend(slots, children);\r\n            }\r\n            else if (optimized && type === 1 /* STABLE */) {\r\n                // compiled AND stable.\r\n                // no need to update, and skip stale slots removal.\r\n                needDeletionCheck = false;\r\n            }\r\n            else {\r\n                // compiled but dynamic (v-if/v-for on slots) - update slots, but skip\r\n                // normalization.\r\n                extend(slots, children);\r\n                // #2893\r\n                // when rendering the optimized slots by manually written render function,\r\n                // we need to delete the `slots._` flag if necessary to make subsequent updates reliable,\r\n                // i.e. let the `renderSlot` create the bailed Fragment\r\n                if (!optimized && type === 1 /* STABLE */) {\r\n                    delete slots._;\r\n                }\r\n            }\r\n        }\r\n        else {\r\n            needDeletionCheck = !children.$stable;\r\n            normalizeObjectSlots(children, slots);\r\n        }\r\n        deletionComparisonTarget = children;\r\n    }\r\n    else if (children) {\r\n        // non slot object children (direct value) passed to a component\r\n        normalizeVNodeSlots(instance, children);\r\n        deletionComparisonTarget = { default: 1 };\r\n    }\r\n    // delete stale slots\r\n    if (needDeletionCheck) {\r\n        for (const key in slots) {\r\n            if (!isInternalKey(key) && !(key in deletionComparisonTarget)) {\r\n                delete slots[key];\r\n            }\r\n        }\r\n    }\r\n};\n\n/**\r\nRuntime helper for applying directives to a vnode. Example usage:\r\n\nconst comp = resolveComponent('comp')\r\nconst foo = resolveDirective('foo')\r\nconst bar = resolveDirective('bar')\r\n\nreturn withDirectives(h(comp), [\r\n  [foo, this.x],\r\n  [bar, this.y]\r\n])\r\n*/\r\nconst isBuiltInDirective = /*#__PURE__*/ makeMap('bind,cloak,else-if,else,for,html,if,model,on,once,pre,show,slot,text');\r\nfunction validateDirectiveName(name) {\r\n    if (isBuiltInDirective(name)) {\r\n        warn('Do not use built-in directive ids as custom directive id: ' + name);\r\n    }\r\n}\r\n/**\r\n * Adds directives to a VNode.\r\n */\r\nfunction withDirectives(vnode, directives) {\r\n    const internalInstance = currentRenderingInstance;\r\n    if (internalInstance === null) {\r\n        (process.env.NODE_ENV !== 'production') && warn(`withDirectives can only be used inside render functions.`);\r\n        return vnode;\r\n    }\r\n    const instance = internalInstance.proxy;\r\n    const bindings = vnode.dirs || (vnode.dirs = []);\r\n    for (let i = 0; i < directives.length; i++) {\r\n        let [dir, value, arg, modifiers = EMPTY_OBJ] = directives[i];\r\n        if (isFunction(dir)) {\r\n            dir = {\r\n                mounted: dir,\r\n                updated: dir\r\n            };\r\n        }\r\n        bindings.push({\r\n            dir,\r\n            instance,\r\n            value,\r\n            oldValue: void 0,\r\n            arg,\r\n            modifiers\r\n        });\r\n    }\r\n    return vnode;\r\n}\r\nfunction invokeDirectiveHook(vnode, prevVNode, instance, name) {\r\n    const bindings = vnode.dirs;\r\n    const oldBindings = prevVNode && prevVNode.dirs;\r\n    for (let i = 0; i < bindings.length; i++) {\r\n        const binding = bindings[i];\r\n        if (oldBindings) {\r\n            binding.oldValue = oldBindings[i].value;\r\n        }\r\n        const hook = binding.dir[name];\r\n        if (hook) {\r\n            callWithAsyncErrorHandling(hook, instance, 8 /* DIRECTIVE_HOOK */, [\r\n                vnode.el,\r\n                binding,\r\n                vnode,\r\n                prevVNode\r\n            ]);\r\n        }\r\n    }\r\n}\n\nfunction createAppContext() {\r\n    return {\r\n        app: null,\r\n        config: {\r\n            isNativeTag: NO,\r\n            performance: false,\r\n            globalProperties: {},\r\n            optionMergeStrategies: {},\r\n            isCustomElement: NO,\r\n            errorHandler: undefined,\r\n            warnHandler: undefined\r\n        },\r\n        mixins: [],\r\n        components: {},\r\n        directives: {},\r\n        provides: Object.create(null)\r\n    };\r\n}\r\nlet uid = 0;\r\nfunction createAppAPI(render, hydrate) {\r\n    return function createApp(rootComponent, rootProps = null) {\r\n        if (rootProps != null && !isObject(rootProps)) {\r\n            (process.env.NODE_ENV !== 'production') && warn(`root props passed to app.mount() must be an object.`);\r\n            rootProps = null;\r\n        }\r\n        const context = createAppContext();\r\n        const installedPlugins = new Set();\r\n        let isMounted = false;\r\n        const app = (context.app = {\r\n            _uid: uid++,\r\n            _component: rootComponent,\r\n            _props: rootProps,\r\n            _container: null,\r\n            _context: context,\r\n            version,\r\n            get config() {\r\n                return context.config;\r\n            },\r\n            set config(v) {\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn(`app.config cannot be replaced. Modify individual options instead.`);\r\n                }\r\n            },\r\n            use(plugin, ...options) {\r\n                if (installedPlugins.has(plugin)) {\r\n                    (process.env.NODE_ENV !== 'production') && warn(`Plugin has already been applied to target app.`);\r\n                }\r\n                else if (plugin && isFunction(plugin.install)) {\r\n                    installedPlugins.add(plugin);\r\n                    plugin.install(app, ...options);\r\n                }\r\n                else if (isFunction(plugin)) {\r\n                    installedPlugins.add(plugin);\r\n                    plugin(app, ...options);\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn(`A plugin must either be a function or an object with an \"install\" ` +\r\n                        `function.`);\r\n                }\r\n                return app;\r\n            },\r\n            mixin(mixin) {\r\n                if (__VUE_OPTIONS_API__) {\r\n                    if (!context.mixins.includes(mixin)) {\r\n                        context.mixins.push(mixin);\r\n                        // global mixin with props/emits de-optimizes props/emits\r\n                        // normalization caching.\r\n                        if (mixin.props || mixin.emits) {\r\n                            context.deopt = true;\r\n                        }\r\n                    }\r\n                    else if ((process.env.NODE_ENV !== 'production')) {\r\n                        warn('Mixin has already been applied to target app' +\r\n                            (mixin.name ? `: ${mixin.name}` : ''));\r\n                    }\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn('Mixins are only available in builds supporting Options API');\r\n                }\r\n                return app;\r\n            },\r\n            component(name, component) {\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    validateComponentName(name, context.config);\r\n                }\r\n                if (!component) {\r\n                    return context.components[name];\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production') && context.components[name]) {\r\n                    warn(`Component \"${name}\" has already been registered in target app.`);\r\n                }\r\n                context.components[name] = component;\r\n                return app;\r\n            },\r\n            directive(name, directive) {\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    validateDirectiveName(name);\r\n                }\r\n                if (!directive) {\r\n                    return context.directives[name];\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production') && context.directives[name]) {\r\n                    warn(`Directive \"${name}\" has already been registered in target app.`);\r\n                }\r\n                context.directives[name] = directive;\r\n                return app;\r\n            },\r\n            mount(rootContainer, isHydrate, isSVG) {\r\n                if (!isMounted) {\r\n                    const vnode = createVNode(rootComponent, rootProps);\r\n                    // store app context on the root VNode.\r\n                    // this will be set on the root instance on initial mount.\r\n                    vnode.appContext = context;\r\n                    // HMR root reload\r\n                    if ((process.env.NODE_ENV !== 'production')) {\r\n                        context.reload = () => {\r\n                            render(cloneVNode(vnode), rootContainer, isSVG);\r\n                        };\r\n                    }\r\n                    if (isHydrate && hydrate) {\r\n                        hydrate(vnode, rootContainer);\r\n                    }\r\n                    else {\r\n                        render(vnode, rootContainer, isSVG);\r\n                    }\r\n                    isMounted = true;\r\n                    app._container = rootContainer;\r\n                    rootContainer.__vue_app__ = app;\r\n                    if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n                        devtoolsInitApp(app, version);\r\n                    }\r\n                    return vnode.component.proxy;\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn(`App has already been mounted.\\n` +\r\n                        `If you want to remount the same app, move your app creation logic ` +\r\n                        `into a factory function and create fresh app instances for each ` +\r\n                        `mount - e.g. \\`const createMyApp = () => createApp(App)\\``);\r\n                }\r\n            },\r\n            unmount() {\r\n                if (isMounted) {\r\n                    render(null, app._container);\r\n                    if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n                        devtoolsUnmountApp(app);\r\n                    }\r\n                    delete app._container.__vue_app__;\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn(`Cannot unmount an app that is not mounted.`);\r\n                }\r\n            },\r\n            provide(key, value) {\r\n                if ((process.env.NODE_ENV !== 'production') && key in context.provides) {\r\n                    warn(`App already provides property with key \"${String(key)}\". ` +\r\n                        `It will be overwritten with the new value.`);\r\n                }\r\n                // TypeScript doesn't allow symbols as index type\r\n                // https://github.com/Microsoft/TypeScript/issues/24587\r\n                context.provides[key] = value;\r\n                return app;\r\n            }\r\n        });\r\n        return app;\r\n    };\r\n}\n\nlet hasMismatch = false;\r\nconst isSVGContainer = (container) => /svg/.test(container.namespaceURI) && container.tagName !== 'foreignObject';\r\nconst isComment = (node) => node.nodeType === 8 /* COMMENT */;\r\n// Note: hydration is DOM-specific\r\n// But we have to place it in core due to tight coupling with core - splitting\r\n// it out creates a ton of unnecessary complexity.\r\n// Hydration also depends on some renderer internal logic which needs to be\r\n// passed in via arguments.\r\nfunction createHydrationFunctions(rendererInternals) {\r\n    const { mt: mountComponent, p: patch, o: { patchProp, nextSibling, parentNode, remove, insert, createComment } } = rendererInternals;\r\n    const hydrate = (vnode, container) => {\r\n        if ((process.env.NODE_ENV !== 'production') && !container.hasChildNodes()) {\r\n            warn(`Attempting to hydrate existing markup but container is empty. ` +\r\n                `Performing full mount instead.`);\r\n            patch(null, vnode, container);\r\n            return;\r\n        }\r\n        hasMismatch = false;\r\n        hydrateNode(container.firstChild, vnode, null, null, null);\r\n        flushPostFlushCbs();\r\n        if (hasMismatch && !false) {\r\n            // this error should show up in production\r\n            console.error(`Hydration completed but contains mismatches.`);\r\n        }\r\n    };\r\n    const hydrateNode = (node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized = false) => {\r\n        const isFragmentStart = isComment(node) && node.data === '[';\r\n        const onMismatch = () => handleMismatch(node, vnode, parentComponent, parentSuspense, slotScopeIds, isFragmentStart);\r\n        const { type, ref, shapeFlag } = vnode;\r\n        const domType = node.nodeType;\r\n        vnode.el = node;\r\n        let nextNode = null;\r\n        switch (type) {\r\n            case Text:\r\n                if (domType !== 3 /* TEXT */) {\r\n                    nextNode = onMismatch();\r\n                }\r\n                else {\r\n                    if (node.data !== vnode.children) {\r\n                        hasMismatch = true;\r\n                        (process.env.NODE_ENV !== 'production') &&\r\n                            warn(`Hydration text mismatch:` +\r\n                                `\\n- Client: ${JSON.stringify(node.data)}` +\r\n                                `\\n- Server: ${JSON.stringify(vnode.children)}`);\r\n                        node.data = vnode.children;\r\n                    }\r\n                    nextNode = nextSibling(node);\r\n                }\r\n                break;\r\n            case Comment:\r\n                if (domType !== 8 /* COMMENT */ || isFragmentStart) {\r\n                    nextNode = onMismatch();\r\n                }\r\n                else {\r\n                    nextNode = nextSibling(node);\r\n                }\r\n                break;\r\n            case Static:\r\n                if (domType !== 1 /* ELEMENT */) {\r\n                    nextNode = onMismatch();\r\n                }\r\n                else {\r\n                    // determine anchor, adopt content\r\n                    nextNode = node;\r\n                    // if the static vnode has its content stripped during build,\r\n                    // adopt it from the server-rendered HTML.\r\n                    const needToAdoptContent = !vnode.children.length;\r\n                    for (let i = 0; i < vnode.staticCount; i++) {\r\n                        if (needToAdoptContent)\r\n                            vnode.children += nextNode.outerHTML;\r\n                        if (i === vnode.staticCount - 1) {\r\n                            vnode.anchor = nextNode;\r\n                        }\r\n                        nextNode = nextSibling(nextNode);\r\n                    }\r\n                    return nextNode;\r\n                }\r\n                break;\r\n            case Fragment:\r\n                if (!isFragmentStart) {\r\n                    nextNode = onMismatch();\r\n                }\r\n                else {\r\n                    nextNode = hydrateFragment(node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized);\r\n                }\r\n                break;\r\n            default:\r\n                if (shapeFlag & 1 /* ELEMENT */) {\r\n                    if (domType !== 1 /* ELEMENT */ ||\r\n                        vnode.type.toLowerCase() !==\r\n                            node.tagName.toLowerCase()) {\r\n                        nextNode = onMismatch();\r\n                    }\r\n                    else {\r\n                        nextNode = hydrateElement(node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized);\r\n                    }\r\n                }\r\n                else if (shapeFlag & 6 /* COMPONENT */) {\r\n                    // when setting up the render effect, if the initial vnode already\r\n                    // has .el set, the component will perform hydration instead of mount\r\n                    // on its sub-tree.\r\n                    vnode.slotScopeIds = slotScopeIds;\r\n                    const container = parentNode(node);\r\n                    const hydrateComponent = () => {\r\n                        mountComponent(vnode, container, null, parentComponent, parentSuspense, isSVGContainer(container), optimized);\r\n                    };\r\n                    // async component\r\n                    const loadAsync = vnode.type.__asyncLoader;\r\n                    if (loadAsync) {\r\n                        loadAsync().then(hydrateComponent);\r\n                    }\r\n                    else {\r\n                        hydrateComponent();\r\n                    }\r\n                    // component may be async, so in the case of fragments we cannot rely\r\n                    // on component's rendered output to determine the end of the fragment\r\n                    // instead, we do a lookahead to find the end anchor node.\r\n                    nextNode = isFragmentStart\r\n                        ? locateClosingAsyncAnchor(node)\r\n                        : nextSibling(node);\r\n                }\r\n                else if (shapeFlag & 64 /* TELEPORT */) {\r\n                    if (domType !== 8 /* COMMENT */) {\r\n                        nextNode = onMismatch();\r\n                    }\r\n                    else {\r\n                        nextNode = vnode.type.hydrate(node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized, rendererInternals, hydrateChildren);\r\n                    }\r\n                }\r\n                else if (shapeFlag & 128 /* SUSPENSE */) {\r\n                    nextNode = vnode.type.hydrate(node, vnode, parentComponent, parentSuspense, isSVGContainer(parentNode(node)), slotScopeIds, optimized, rendererInternals, hydrateNode);\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn('Invalid HostVNode type:', type, `(${typeof type})`);\r\n                }\r\n        }\r\n        if (ref != null) {\r\n            setRef(ref, null, parentSuspense, vnode);\r\n        }\r\n        return nextNode;\r\n    };\r\n    const hydrateElement = (el, vnode, parentComponent, parentSuspense, slotScopeIds, optimized) => {\r\n        optimized = optimized || !!vnode.dynamicChildren;\r\n        const { props, patchFlag, shapeFlag, dirs } = vnode;\r\n        // skip props & children if this is hoisted static nodes\r\n        if (patchFlag !== -1 /* HOISTED */) {\r\n            if (dirs) {\r\n                invokeDirectiveHook(vnode, null, parentComponent, 'created');\r\n            }\r\n            // props\r\n            if (props) {\r\n                if (!optimized ||\r\n                    (patchFlag & 16 /* FULL_PROPS */ ||\r\n                        patchFlag & 32 /* HYDRATE_EVENTS */)) {\r\n                    for (const key in props) {\r\n                        if (!isReservedProp(key) && isOn(key)) {\r\n                            patchProp(el, key, null, props[key]);\r\n                        }\r\n                    }\r\n                }\r\n                else if (props.onClick) {\r\n                    // Fast path for click listeners (which is most often) to avoid\r\n                    // iterating through props.\r\n                    patchProp(el, 'onClick', null, props.onClick);\r\n                }\r\n            }\r\n            // vnode / directive hooks\r\n            let vnodeHooks;\r\n            if ((vnodeHooks = props && props.onVnodeBeforeMount)) {\r\n                invokeVNodeHook(vnodeHooks, parentComponent, vnode);\r\n            }\r\n            if (dirs) {\r\n                invokeDirectiveHook(vnode, null, parentComponent, 'beforeMount');\r\n            }\r\n            if ((vnodeHooks = props && props.onVnodeMounted) || dirs) {\r\n                queueEffectWithSuspense(() => {\r\n                    vnodeHooks && invokeVNodeHook(vnodeHooks, parentComponent, vnode);\r\n                    dirs && invokeDirectiveHook(vnode, null, parentComponent, 'mounted');\r\n                }, parentSuspense);\r\n            }\r\n            // children\r\n            if (shapeFlag & 16 /* ARRAY_CHILDREN */ &&\r\n                // skip if element has innerHTML / textContent\r\n                !(props && (props.innerHTML || props.textContent))) {\r\n                let next = hydrateChildren(el.firstChild, vnode, el, parentComponent, parentSuspense, slotScopeIds, optimized);\r\n                let hasWarned = false;\r\n                while (next) {\r\n                    hasMismatch = true;\r\n                    if ((process.env.NODE_ENV !== 'production') && !hasWarned) {\r\n                        warn(`Hydration children mismatch in <${vnode.type}>: ` +\r\n                            `server rendered element contains more child nodes than client vdom.`);\r\n                        hasWarned = true;\r\n                    }\r\n                    // The SSRed DOM contains more nodes than it should. Remove them.\r\n                    const cur = next;\r\n                    next = next.nextSibling;\r\n                    remove(cur);\r\n                }\r\n            }\r\n            else if (shapeFlag & 8 /* TEXT_CHILDREN */) {\r\n                if (el.textContent !== vnode.children) {\r\n                    hasMismatch = true;\r\n                    (process.env.NODE_ENV !== 'production') &&\r\n                        warn(`Hydration text content mismatch in <${vnode.type}>:\\n` +\r\n                            `- Client: ${el.textContent}\\n` +\r\n                            `- Server: ${vnode.children}`);\r\n                    el.textContent = vnode.children;\r\n                }\r\n            }\r\n        }\r\n        return el.nextSibling;\r\n    };\r\n    const hydrateChildren = (node, parentVNode, container, parentComponent, parentSuspense, slotScopeIds, optimized) => {\r\n        optimized = optimized || !!parentVNode.dynamicChildren;\r\n        const children = parentVNode.children;\r\n        const l = children.length;\r\n        let hasWarned = false;\r\n        for (let i = 0; i < l; i++) {\r\n            const vnode = optimized\r\n                ? children[i]\r\n                : (children[i] = normalizeVNode(children[i]));\r\n            if (node) {\r\n                node = hydrateNode(node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized);\r\n            }\r\n            else if (vnode.type === Text && !vnode.children) {\r\n                continue;\r\n            }\r\n            else {\r\n                hasMismatch = true;\r\n                if ((process.env.NODE_ENV !== 'production') && !hasWarned) {\r\n                    warn(`Hydration children mismatch in <${container.tagName.toLowerCase()}>: ` +\r\n                        `server rendered element contains fewer child nodes than client vdom.`);\r\n                    hasWarned = true;\r\n                }\r\n                // the SSRed DOM didn't contain enough nodes. Mount the missing ones.\r\n                patch(null, vnode, container, null, parentComponent, parentSuspense, isSVGContainer(container), slotScopeIds);\r\n            }\r\n        }\r\n        return node;\r\n    };\r\n    const hydrateFragment = (node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized) => {\r\n        const { slotScopeIds: fragmentSlotScopeIds } = vnode;\r\n        if (fragmentSlotScopeIds) {\r\n            slotScopeIds = slotScopeIds\r\n                ? slotScopeIds.concat(fragmentSlotScopeIds)\r\n                : fragmentSlotScopeIds;\r\n        }\r\n        const container = parentNode(node);\r\n        const next = hydrateChildren(nextSibling(node), vnode, container, parentComponent, parentSuspense, slotScopeIds, optimized);\r\n        if (next && isComment(next) && next.data === ']') {\r\n            return nextSibling((vnode.anchor = next));\r\n        }\r\n        else {\r\n            // fragment didn't hydrate successfully, since we didn't get a end anchor\r\n            // back. This should have led to node/children mismatch warnings.\r\n            hasMismatch = true;\r\n            // since the anchor is missing, we need to create one and insert it\r\n            insert((vnode.anchor = createComment(`]`)), container, next);\r\n            return next;\r\n        }\r\n    };\r\n    const handleMismatch = (node, vnode, parentComponent, parentSuspense, slotScopeIds, isFragment) => {\r\n        hasMismatch = true;\r\n        (process.env.NODE_ENV !== 'production') &&\r\n            warn(`Hydration node mismatch:\\n- Client vnode:`, vnode.type, `\\n- Server rendered DOM:`, node, node.nodeType === 3 /* TEXT */\r\n                ? `(text)`\r\n                : isComment(node) && node.data === '['\r\n                    ? `(start of fragment)`\r\n                    : ``);\r\n        vnode.el = null;\r\n        if (isFragment) {\r\n            // remove excessive fragment nodes\r\n            const end = locateClosingAsyncAnchor(node);\r\n            while (true) {\r\n                const next = nextSibling(node);\r\n                if (next && next !== end) {\r\n                    remove(next);\r\n                }\r\n                else {\r\n                    break;\r\n                }\r\n            }\r\n        }\r\n        const next = nextSibling(node);\r\n        const container = parentNode(node);\r\n        remove(node);\r\n        patch(null, vnode, container, next, parentComponent, parentSuspense, isSVGContainer(container), slotScopeIds);\r\n        return next;\r\n    };\r\n    const locateClosingAsyncAnchor = (node) => {\r\n        let match = 0;\r\n        while (node) {\r\n            node = nextSibling(node);\r\n            if (node && isComment(node)) {\r\n                if (node.data === '[')\r\n                    match++;\r\n                if (node.data === ']') {\r\n                    if (match === 0) {\r\n                        return nextSibling(node);\r\n                    }\r\n                    else {\r\n                        match--;\r\n                    }\r\n                }\r\n            }\r\n        }\r\n        return node;\r\n    };\r\n    return [hydrate, hydrateNode];\r\n}\n\nlet supported;\r\nlet perf;\r\nfunction startMeasure(instance, type) {\r\n    if (instance.appContext.config.performance && isSupported()) {\r\n        perf.mark(`vue-${type}-${instance.uid}`);\r\n    }\r\n}\r\nfunction endMeasure(instance, type) {\r\n    if (instance.appContext.config.performance && isSupported()) {\r\n        const startTag = `vue-${type}-${instance.uid}`;\r\n        const endTag = startTag + `:end`;\r\n        perf.mark(endTag);\r\n        perf.measure(`<${formatComponentName(instance, instance.type)}> ${type}`, startTag, endTag);\r\n        perf.clearMarks(startTag);\r\n        perf.clearMarks(endTag);\r\n    }\r\n}\r\nfunction isSupported() {\r\n    if (supported !== undefined) {\r\n        return supported;\r\n    }\r\n    /* eslint-disable no-restricted-globals */\r\n    if (typeof window !== 'undefined' && window.performance) {\r\n        supported = true;\r\n        perf = window.performance;\r\n    }\r\n    else {\r\n        supported = false;\r\n    }\r\n    /* eslint-enable no-restricted-globals */\r\n    return supported;\r\n}\n\n/**\r\n * This is only called in esm-bundler builds.\r\n * It is called when a renderer is created, in `baseCreateRenderer` so that\r\n * importing runtime-core is side-effects free.\r\n *\r\n * istanbul-ignore-next\r\n */\r\nfunction initFeatureFlags() {\r\n    let needWarn = false;\r\n    if (typeof __VUE_OPTIONS_API__ !== 'boolean') {\r\n        needWarn = true;\r\n        getGlobalThis().__VUE_OPTIONS_API__ = true;\r\n    }\r\n    if (typeof __VUE_PROD_DEVTOOLS__ !== 'boolean') {\r\n        needWarn = true;\r\n        getGlobalThis().__VUE_PROD_DEVTOOLS__ = false;\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && needWarn) {\r\n        console.warn(`You are running the esm-bundler build of Vue. It is recommended to ` +\r\n            `configure your bundler to explicitly replace feature flag globals ` +\r\n            `with boolean literals to get proper tree-shaking in the final bundle. ` +\r\n            `See http://link.vuejs.org/feature-flags for more details.`);\r\n    }\r\n}\n\n// implementation, close to no-op\r\nfunction defineComponent(options) {\r\n    return isFunction(options) ? { setup: options, name: options.name } : options;\r\n}\n\nconst isAsyncWrapper = (i) => !!i.type.__asyncLoader;\r\nfunction defineAsyncComponent(source) {\r\n    if (isFunction(source)) {\r\n        source = { loader: source };\r\n    }\r\n    const { loader, loadingComponent, errorComponent, delay = 200, timeout, // undefined = never times out\r\n    suspensible = true, onError: userOnError } = source;\r\n    let pendingRequest = null;\r\n    let resolvedComp;\r\n    let retries = 0;\r\n    const retry = () => {\r\n        retries++;\r\n        pendingRequest = null;\r\n        return load();\r\n    };\r\n    const load = () => {\r\n        let thisRequest;\r\n        return (pendingRequest ||\r\n            (thisRequest = pendingRequest = loader()\r\n                .catch(err => {\r\n                err = err instanceof Error ? err : new Error(String(err));\r\n                if (userOnError) {\r\n                    return new Promise((resolve, reject) => {\r\n                        const userRetry = () => resolve(retry());\r\n                        const userFail = () => reject(err);\r\n                        userOnError(err, userRetry, userFail, retries + 1);\r\n                    });\r\n                }\r\n                else {\r\n                    throw err;\r\n                }\r\n            })\r\n                .then((comp) => {\r\n                if (thisRequest !== pendingRequest && pendingRequest) {\r\n                    return pendingRequest;\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production') && !comp) {\r\n                    warn(`Async component loader resolved to undefined. ` +\r\n                        `If you are using retry(), make sure to return its return value.`);\r\n                }\r\n                // interop module default\r\n                if (comp &&\r\n                    (comp.__esModule || comp[Symbol.toStringTag] === 'Module')) {\r\n                    comp = comp.default;\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production') && comp && !isObject(comp) && !isFunction(comp)) {\r\n                    throw new Error(`Invalid async component load result: ${comp}`);\r\n                }\r\n                resolvedComp = comp;\r\n                return comp;\r\n            })));\r\n    };\r\n    return defineComponent({\r\n        __asyncLoader: load,\r\n        name: 'AsyncComponentWrapper',\r\n        setup() {\r\n            const instance = currentInstance;\r\n            // already resolved\r\n            if (resolvedComp) {\r\n                return () => createInnerComp(resolvedComp, instance);\r\n            }\r\n            const onError = (err) => {\r\n                pendingRequest = null;\r\n                handleError(err, instance, 13 /* ASYNC_COMPONENT_LOADER */, !errorComponent /* do not throw in dev if user provided error component */);\r\n            };\r\n            // suspense-controlled or SSR.\r\n            if ((suspensible && instance.suspense) ||\r\n                (false )) {\r\n                return load()\r\n                    .then(comp => {\r\n                    return () => createInnerComp(comp, instance);\r\n                })\r\n                    .catch(err => {\r\n                    onError(err);\r\n                    return () => errorComponent\r\n                        ? createVNode(errorComponent, {\r\n                            error: err\r\n                        })\r\n                        : null;\r\n                });\r\n            }\r\n            const loaded = ref(false);\r\n            const error = ref();\r\n            const delayed = ref(!!delay);\r\n            if (delay) {\r\n                setTimeout(() => {\r\n                    delayed.value = false;\r\n                }, delay);\r\n            }\r\n            if (timeout != null) {\r\n                setTimeout(() => {\r\n                    if (!loaded.value && !error.value) {\r\n                        const err = new Error(`Async component timed out after ${timeout}ms.`);\r\n                        onError(err);\r\n                        error.value = err;\r\n                    }\r\n                }, timeout);\r\n            }\r\n            load()\r\n                .then(() => {\r\n                loaded.value = true;\r\n            })\r\n                .catch(err => {\r\n                onError(err);\r\n                error.value = err;\r\n            });\r\n            return () => {\r\n                if (loaded.value && resolvedComp) {\r\n                    return createInnerComp(resolvedComp, instance);\r\n                }\r\n                else if (error.value && errorComponent) {\r\n                    return createVNode(errorComponent, {\r\n                        error: error.value\r\n                    });\r\n                }\r\n                else if (loadingComponent && !delayed.value) {\r\n                    return createVNode(loadingComponent);\r\n                }\r\n            };\r\n        }\r\n    });\r\n}\r\nfunction createInnerComp(comp, { vnode: { ref, props, children } }) {\r\n    const vnode = createVNode(comp, props, children);\r\n    // ensure inner component inherits the async wrapper's ref owner\r\n    vnode.ref = ref;\r\n    return vnode;\r\n}\n\nconst prodEffectOptions = {\r\n    scheduler: queueJob,\r\n    // #1801, #2043 component render effects should allow recursive updates\r\n    allowRecurse: true\r\n};\r\nfunction createDevEffectOptions(instance) {\r\n    return {\r\n        scheduler: queueJob,\r\n        allowRecurse: true,\r\n        onTrack: instance.rtc ? e => invokeArrayFns(instance.rtc, e) : void 0,\r\n        onTrigger: instance.rtg ? e => invokeArrayFns(instance.rtg, e) : void 0\r\n    };\r\n}\r\nconst queuePostRenderEffect = queueEffectWithSuspense\r\n    ;\r\nconst setRef = (rawRef, oldRawRef, parentSuspense, vnode) => {\r\n    if (isArray(rawRef)) {\r\n        rawRef.forEach((r, i) => setRef(r, oldRawRef && (isArray(oldRawRef) ? oldRawRef[i] : oldRawRef), parentSuspense, vnode));\r\n        return;\r\n    }\r\n    let value;\r\n    if (!vnode) {\r\n        // means unmount\r\n        value = null;\r\n    }\r\n    else if (isAsyncWrapper(vnode)) {\r\n        // when mounting async components, nothing needs to be done,\r\n        // because the template ref is forwarded to inner component\r\n        return;\r\n    }\r\n    else if (vnode.shapeFlag & 4 /* STATEFUL_COMPONENT */) {\r\n        value = vnode.component.exposed || vnode.component.proxy;\r\n    }\r\n    else {\r\n        value = vnode.el;\r\n    }\r\n    const { i: owner, r: ref } = rawRef;\r\n    if ((process.env.NODE_ENV !== 'production') && !owner) {\r\n        warn(`Missing ref owner context. ref cannot be used on hoisted vnodes. ` +\r\n            `A vnode with ref must be created inside the render function.`);\r\n        return;\r\n    }\r\n    const oldRef = oldRawRef && oldRawRef.r;\r\n    const refs = owner.refs === EMPTY_OBJ ? (owner.refs = {}) : owner.refs;\r\n    const setupState = owner.setupState;\r\n    // unset old ref\r\n    if (oldRef != null && oldRef !== ref) {\r\n        if (isString(oldRef)) {\r\n            refs[oldRef] = null;\r\n            if (hasOwn(setupState, oldRef)) {\r\n                setupState[oldRef] = null;\r\n            }\r\n        }\r\n        else if (isRef(oldRef)) {\r\n            oldRef.value = null;\r\n        }\r\n    }\r\n    if (isString(ref)) {\r\n        const doSet = () => {\r\n            refs[ref] = value;\r\n            if (hasOwn(setupState, ref)) {\r\n                setupState[ref] = value;\r\n            }\r\n        };\r\n        // #1789: for non-null values, set them after render\r\n        // null values means this is unmount and it should not overwrite another\r\n        // ref with the same key\r\n        if (value) {\r\n            doSet.id = -1;\r\n            queuePostRenderEffect(doSet, parentSuspense);\r\n        }\r\n        else {\r\n            doSet();\r\n        }\r\n    }\r\n    else if (isRef(ref)) {\r\n        const doSet = () => {\r\n            ref.value = value;\r\n        };\r\n        if (value) {\r\n            doSet.id = -1;\r\n            queuePostRenderEffect(doSet, parentSuspense);\r\n        }\r\n        else {\r\n            doSet();\r\n        }\r\n    }\r\n    else if (isFunction(ref)) {\r\n        callWithErrorHandling(ref, owner, 12 /* FUNCTION_REF */, [value, refs]);\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        warn('Invalid template ref type:', value, `(${typeof value})`);\r\n    }\r\n};\r\n/**\r\n * The createRenderer function accepts two generic arguments:\r\n * HostNode and HostElement, corresponding to Node and Element types in the\r\n * host environment. For example, for runtime-dom, HostNode would be the DOM\r\n * `Node` interface and HostElement would be the DOM `Element` interface.\r\n *\r\n * Custom renderers can pass in the platform specific types like this:\r\n *\r\n * ``` js\r\n * const { render, createApp } = createRenderer<Node, Element>({\r\n *   patchProp,\r\n *   ...nodeOps\r\n * })\r\n * ```\r\n */\r\nfunction createRenderer(options) {\r\n    return baseCreateRenderer(options);\r\n}\r\n// Separate API for creating hydration-enabled renderer.\r\n// Hydration logic is only used when calling this function, making it\r\n// tree-shakable.\r\nfunction createHydrationRenderer(options) {\r\n    return baseCreateRenderer(options, createHydrationFunctions);\r\n}\r\n// implementation\r\nfunction baseCreateRenderer(options, createHydrationFns) {\r\n    // compile-time feature flags check\r\n    {\r\n        initFeatureFlags();\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n        const target = getGlobalThis();\r\n        target.__VUE__ = true;\r\n        setDevtoolsHook(target.__VUE_DEVTOOLS_GLOBAL_HOOK__);\r\n    }\r\n    const { insert: hostInsert, remove: hostRemove, patchProp: hostPatchProp, forcePatchProp: hostForcePatchProp, createElement: hostCreateElement, createText: hostCreateText, createComment: hostCreateComment, setText: hostSetText, setElementText: hostSetElementText, parentNode: hostParentNode, nextSibling: hostNextSibling, setScopeId: hostSetScopeId = NOOP, cloneNode: hostCloneNode, insertStaticContent: hostInsertStaticContent } = options;\r\n    // Note: functions inside this closure should use `const xxx = () => {}`\r\n    // style in order to prevent being inlined by minifiers.\r\n    const patch = (n1, n2, container, anchor = null, parentComponent = null, parentSuspense = null, isSVG = false, slotScopeIds = null, optimized = false) => {\r\n        // patching & not same type, unmount old tree\r\n        if (n1 && !isSameVNodeType(n1, n2)) {\r\n            anchor = getNextHostNode(n1);\r\n            unmount(n1, parentComponent, parentSuspense, true);\r\n            n1 = null;\r\n        }\r\n        if (n2.patchFlag === -2 /* BAIL */) {\r\n            optimized = false;\r\n            n2.dynamicChildren = null;\r\n        }\r\n        const { type, ref, shapeFlag } = n2;\r\n        switch (type) {\r\n            case Text:\r\n                processText(n1, n2, container, anchor);\r\n                break;\r\n            case Comment:\r\n                processCommentNode(n1, n2, container, anchor);\r\n                break;\r\n            case Static:\r\n                if (n1 == null) {\r\n                    mountStaticNode(n2, container, anchor, isSVG);\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    patchStaticNode(n1, n2, container, isSVG);\r\n                }\r\n                break;\r\n            case Fragment:\r\n                processFragment(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                break;\r\n            default:\r\n                if (shapeFlag & 1 /* ELEMENT */) {\r\n                    processElement(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                }\r\n                else if (shapeFlag & 6 /* COMPONENT */) {\r\n                    processComponent(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                }\r\n                else if (shapeFlag & 64 /* TELEPORT */) {\r\n                    type.process(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, internals);\r\n                }\r\n                else if (shapeFlag & 128 /* SUSPENSE */) {\r\n                    type.process(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, internals);\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn('Invalid VNode type:', type, `(${typeof type})`);\r\n                }\r\n        }\r\n        // set ref\r\n        if (ref != null && parentComponent) {\r\n            setRef(ref, n1 && n1.ref, parentSuspense, n2);\r\n        }\r\n    };\r\n    const processText = (n1, n2, container, anchor) => {\r\n        if (n1 == null) {\r\n            hostInsert((n2.el = hostCreateText(n2.children)), container, anchor);\r\n        }\r\n        else {\r\n            const el = (n2.el = n1.el);\r\n            if (n2.children !== n1.children) {\r\n                hostSetText(el, n2.children);\r\n            }\r\n        }\r\n    };\r\n    const processCommentNode = (n1, n2, container, anchor) => {\r\n        if (n1 == null) {\r\n            hostInsert((n2.el = hostCreateComment(n2.children || '')), container, anchor);\r\n        }\r\n        else {\r\n            // there's no support for dynamic comments\r\n            n2.el = n1.el;\r\n        }\r\n    };\r\n    const mountStaticNode = (n2, container, anchor, isSVG) => {\r\n        [n2.el, n2.anchor] = hostInsertStaticContent(n2.children, container, anchor, isSVG);\r\n    };\r\n    /**\r\n     * Dev / HMR only\r\n     */\r\n    const patchStaticNode = (n1, n2, container, isSVG) => {\r\n        // static nodes are only patched during dev for HMR\r\n        if (n2.children !== n1.children) {\r\n            const anchor = hostNextSibling(n1.anchor);\r\n            // remove existing\r\n            removeStaticNode(n1);\r\n            [n2.el, n2.anchor] = hostInsertStaticContent(n2.children, container, anchor, isSVG);\r\n        }\r\n        else {\r\n            n2.el = n1.el;\r\n            n2.anchor = n1.anchor;\r\n        }\r\n    };\r\n    const moveStaticNode = ({ el, anchor }, container, nextSibling) => {\r\n        let next;\r\n        while (el && el !== anchor) {\r\n            next = hostNextSibling(el);\r\n            hostInsert(el, container, nextSibling);\r\n            el = next;\r\n        }\r\n        hostInsert(anchor, container, nextSibling);\r\n    };\r\n    const removeStaticNode = ({ el, anchor }) => {\r\n        let next;\r\n        while (el && el !== anchor) {\r\n            next = hostNextSibling(el);\r\n            hostRemove(el);\r\n            el = next;\r\n        }\r\n        hostRemove(anchor);\r\n    };\r\n    const processElement = (n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        isSVG = isSVG || n2.type === 'svg';\r\n        if (n1 == null) {\r\n            mountElement(n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n        }\r\n        else {\r\n            patchElement(n1, n2, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n        }\r\n    };\r\n    const mountElement = (vnode, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        let el;\r\n        let vnodeHook;\r\n        const { type, props, shapeFlag, transition, patchFlag, dirs } = vnode;\r\n        if (!(process.env.NODE_ENV !== 'production') &&\r\n            vnode.el &&\r\n            hostCloneNode !== undefined &&\r\n            patchFlag === -1 /* HOISTED */) {\r\n            // If a vnode has non-null el, it means it's being reused.\r\n            // Only static vnodes can be reused, so its mounted DOM nodes should be\r\n            // exactly the same, and we can simply do a clone here.\r\n            // only do this in production since cloned trees cannot be HMR updated.\r\n            el = vnode.el = hostCloneNode(vnode.el);\r\n        }\r\n        else {\r\n            el = vnode.el = hostCreateElement(vnode.type, isSVG, props && props.is, props);\r\n            // mount children first, since some props may rely on child content\r\n            // being already rendered, e.g. `<select value>`\r\n            if (shapeFlag & 8 /* TEXT_CHILDREN */) {\r\n                hostSetElementText(el, vnode.children);\r\n            }\r\n            else if (shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                mountChildren(vnode.children, el, null, parentComponent, parentSuspense, isSVG && type !== 'foreignObject', slotScopeIds, optimized || !!vnode.dynamicChildren);\r\n            }\r\n            if (dirs) {\r\n                invokeDirectiveHook(vnode, null, parentComponent, 'created');\r\n            }\r\n            // props\r\n            if (props) {\r\n                for (const key in props) {\r\n                    if (!isReservedProp(key)) {\r\n                        hostPatchProp(el, key, null, props[key], isSVG, vnode.children, parentComponent, parentSuspense, unmountChildren);\r\n                    }\r\n                }\r\n                if ((vnodeHook = props.onVnodeBeforeMount)) {\r\n                    invokeVNodeHook(vnodeHook, parentComponent, vnode);\r\n                }\r\n            }\r\n            // scopeId\r\n            setScopeId(el, vnode, vnode.scopeId, slotScopeIds, parentComponent);\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n            Object.defineProperty(el, '__vnode', {\r\n                value: vnode,\r\n                enumerable: false\r\n            });\r\n            Object.defineProperty(el, '__vueParentComponent', {\r\n                value: parentComponent,\r\n                enumerable: false\r\n            });\r\n        }\r\n        if (dirs) {\r\n            invokeDirectiveHook(vnode, null, parentComponent, 'beforeMount');\r\n        }\r\n        // #1583 For inside suspense + suspense not resolved case, enter hook should call when suspense resolved\r\n        // #1689 For inside suspense + suspense resolved case, just call it\r\n        const needCallTransitionHooks = (!parentSuspense || (parentSuspense && !parentSuspense.pendingBranch)) &&\r\n            transition &&\r\n            !transition.persisted;\r\n        if (needCallTransitionHooks) {\r\n            transition.beforeEnter(el);\r\n        }\r\n        hostInsert(el, container, anchor);\r\n        if ((vnodeHook = props && props.onVnodeMounted) ||\r\n            needCallTransitionHooks ||\r\n            dirs) {\r\n            queuePostRenderEffect(() => {\r\n                vnodeHook && invokeVNodeHook(vnodeHook, parentComponent, vnode);\r\n                needCallTransitionHooks && transition.enter(el);\r\n                dirs && invokeDirectiveHook(vnode, null, parentComponent, 'mounted');\r\n            }, parentSuspense);\r\n        }\r\n    };\r\n    const setScopeId = (el, vnode, scopeId, slotScopeIds, parentComponent) => {\r\n        if (scopeId) {\r\n            hostSetScopeId(el, scopeId);\r\n        }\r\n        if (slotScopeIds) {\r\n            for (let i = 0; i < slotScopeIds.length; i++) {\r\n                hostSetScopeId(el, slotScopeIds[i]);\r\n            }\r\n        }\r\n        if (parentComponent) {\r\n            let subTree = parentComponent.subTree;\r\n            if ((process.env.NODE_ENV !== 'production') &&\r\n                subTree.patchFlag > 0 &&\r\n                subTree.patchFlag & 2048 /* DEV_ROOT_FRAGMENT */) {\r\n                subTree =\r\n                    filterSingleRoot(subTree.children) || subTree;\r\n            }\r\n            if (vnode === subTree) {\r\n                const parentVNode = parentComponent.vnode;\r\n                setScopeId(el, parentVNode, parentVNode.scopeId, parentVNode.slotScopeIds, parentComponent.parent);\r\n            }\r\n        }\r\n    };\r\n    const mountChildren = (children, container, anchor, parentComponent, parentSuspense, isSVG, optimized, slotScopeIds, start = 0) => {\r\n        for (let i = start; i < children.length; i++) {\r\n            const child = (children[i] = optimized\r\n                ? cloneIfMounted(children[i])\r\n                : normalizeVNode(children[i]));\r\n            patch(null, child, container, anchor, parentComponent, parentSuspense, isSVG, optimized, slotScopeIds);\r\n        }\r\n    };\r\n    const patchElement = (n1, n2, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        const el = (n2.el = n1.el);\r\n        let { patchFlag, dynamicChildren, dirs } = n2;\r\n        // #1426 take the old vnode's patch flag into account since user may clone a\r\n        // compiler-generated vnode, which de-opts to FULL_PROPS\r\n        patchFlag |= n1.patchFlag & 16 /* FULL_PROPS */;\r\n        const oldProps = n1.props || EMPTY_OBJ;\r\n        const newProps = n2.props || EMPTY_OBJ;\r\n        let vnodeHook;\r\n        if ((vnodeHook = newProps.onVnodeBeforeUpdate)) {\r\n            invokeVNodeHook(vnodeHook, parentComponent, n2, n1);\r\n        }\r\n        if (dirs) {\r\n            invokeDirectiveHook(n2, n1, parentComponent, 'beforeUpdate');\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production') && isHmrUpdating) {\r\n            // HMR updated, force full diff\r\n            patchFlag = 0;\r\n            optimized = false;\r\n            dynamicChildren = null;\r\n        }\r\n        if (patchFlag > 0) {\r\n            // the presence of a patchFlag means this element's render code was\r\n            // generated by the compiler and can take the fast path.\r\n            // in this path old node and new node are guaranteed to have the same shape\r\n            // (i.e. at the exact same position in the source template)\r\n            if (patchFlag & 16 /* FULL_PROPS */) {\r\n                // element props contain dynamic keys, full diff needed\r\n                patchProps(el, n2, oldProps, newProps, parentComponent, parentSuspense, isSVG);\r\n            }\r\n            else {\r\n                // class\r\n                // this flag is matched when the element has dynamic class bindings.\r\n                if (patchFlag & 2 /* CLASS */) {\r\n                    if (oldProps.class !== newProps.class) {\r\n                        hostPatchProp(el, 'class', null, newProps.class, isSVG);\r\n                    }\r\n                }\r\n                // style\r\n                // this flag is matched when the element has dynamic style bindings\r\n                if (patchFlag & 4 /* STYLE */) {\r\n                    hostPatchProp(el, 'style', oldProps.style, newProps.style, isSVG);\r\n                }\r\n                // props\r\n                // This flag is matched when the element has dynamic prop/attr bindings\r\n                // other than class and style. The keys of dynamic prop/attrs are saved for\r\n                // faster iteration.\r\n                // Note dynamic keys like :[foo]=\"bar\" will cause this optimization to\r\n                // bail out and go through a full diff because we need to unset the old key\r\n                if (patchFlag & 8 /* PROPS */) {\r\n                    // if the flag is present then dynamicProps must be non-null\r\n                    const propsToUpdate = n2.dynamicProps;\r\n                    for (let i = 0; i < propsToUpdate.length; i++) {\r\n                        const key = propsToUpdate[i];\r\n                        const prev = oldProps[key];\r\n                        const next = newProps[key];\r\n                        if (next !== prev ||\r\n                            (hostForcePatchProp && hostForcePatchProp(el, key))) {\r\n                            hostPatchProp(el, key, prev, next, isSVG, n1.children, parentComponent, parentSuspense, unmountChildren);\r\n                        }\r\n                    }\r\n                }\r\n            }\r\n            // text\r\n            // This flag is matched when the element has only dynamic text children.\r\n            if (patchFlag & 1 /* TEXT */) {\r\n                if (n1.children !== n2.children) {\r\n                    hostSetElementText(el, n2.children);\r\n                }\r\n            }\r\n        }\r\n        else if (!optimized && dynamicChildren == null) {\r\n            // unoptimized, full diff\r\n            patchProps(el, n2, oldProps, newProps, parentComponent, parentSuspense, isSVG);\r\n        }\r\n        const areChildrenSVG = isSVG && n2.type !== 'foreignObject';\r\n        if (dynamicChildren) {\r\n            patchBlockChildren(n1.dynamicChildren, dynamicChildren, el, parentComponent, parentSuspense, areChildrenSVG, slotScopeIds);\r\n            if ((process.env.NODE_ENV !== 'production') && parentComponent && parentComponent.type.__hmrId) {\r\n                traverseStaticChildren(n1, n2);\r\n            }\r\n        }\r\n        else if (!optimized) {\r\n            // full diff\r\n            patchChildren(n1, n2, el, null, parentComponent, parentSuspense, areChildrenSVG, slotScopeIds, false);\r\n        }\r\n        if ((vnodeHook = newProps.onVnodeUpdated) || dirs) {\r\n            queuePostRenderEffect(() => {\r\n                vnodeHook && invokeVNodeHook(vnodeHook, parentComponent, n2, n1);\r\n                dirs && invokeDirectiveHook(n2, n1, parentComponent, 'updated');\r\n            }, parentSuspense);\r\n        }\r\n    };\r\n    // The fast path for blocks.\r\n    const patchBlockChildren = (oldChildren, newChildren, fallbackContainer, parentComponent, parentSuspense, isSVG, slotScopeIds) => {\r\n        for (let i = 0; i < newChildren.length; i++) {\r\n            const oldVNode = oldChildren[i];\r\n            const newVNode = newChildren[i];\r\n            // Determine the container (parent element) for the patch.\r\n            const container = \r\n            // - In the case of a Fragment, we need to provide the actual parent\r\n            // of the Fragment itself so it can move its children.\r\n            oldVNode.type === Fragment ||\r\n                // - In the case of different nodes, there is going to be a replacement\r\n                // which also requires the correct parent container\r\n                !isSameVNodeType(oldVNode, newVNode) ||\r\n                // - In the case of a component, it could contain anything.\r\n                oldVNode.shapeFlag & 6 /* COMPONENT */ ||\r\n                oldVNode.shapeFlag & 64 /* TELEPORT */\r\n                ? hostParentNode(oldVNode.el)\r\n                : // In other cases, the parent container is not actually used so we\r\n                    // just pass the block element here to avoid a DOM parentNode call.\r\n                    fallbackContainer;\r\n            patch(oldVNode, newVNode, container, null, parentComponent, parentSuspense, isSVG, slotScopeIds, true);\r\n        }\r\n    };\r\n    const patchProps = (el, vnode, oldProps, newProps, parentComponent, parentSuspense, isSVG) => {\r\n        if (oldProps !== newProps) {\r\n            for (const key in newProps) {\r\n                // empty string is not valid prop\r\n                if (isReservedProp(key))\r\n                    continue;\r\n                const next = newProps[key];\r\n                const prev = oldProps[key];\r\n                if (next !== prev ||\r\n                    (hostForcePatchProp && hostForcePatchProp(el, key))) {\r\n                    hostPatchProp(el, key, prev, next, isSVG, vnode.children, parentComponent, parentSuspense, unmountChildren);\r\n                }\r\n            }\r\n            if (oldProps !== EMPTY_OBJ) {\r\n                for (const key in oldProps) {\r\n                    if (!isReservedProp(key) && !(key in newProps)) {\r\n                        hostPatchProp(el, key, oldProps[key], null, isSVG, vnode.children, parentComponent, parentSuspense, unmountChildren);\r\n                    }\r\n                }\r\n            }\r\n        }\r\n    };\r\n    const processFragment = (n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        const fragmentStartAnchor = (n2.el = n1 ? n1.el : hostCreateText(''));\r\n        const fragmentEndAnchor = (n2.anchor = n1 ? n1.anchor : hostCreateText(''));\r\n        let { patchFlag, dynamicChildren, slotScopeIds: fragmentSlotScopeIds } = n2;\r\n        if (patchFlag > 0) {\r\n            optimized = true;\r\n        }\r\n        // check if this is a slot fragment with :slotted scope ids\r\n        if (fragmentSlotScopeIds) {\r\n            slotScopeIds = slotScopeIds\r\n                ? slotScopeIds.concat(fragmentSlotScopeIds)\r\n                : fragmentSlotScopeIds;\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production') && isHmrUpdating) {\r\n            // HMR updated, force full diff\r\n            patchFlag = 0;\r\n            optimized = false;\r\n            dynamicChildren = null;\r\n        }\r\n        if (n1 == null) {\r\n            hostInsert(fragmentStartAnchor, container, anchor);\r\n            hostInsert(fragmentEndAnchor, container, anchor);\r\n            // a fragment can only have array children\r\n            // since they are either generated by the compiler, or implicitly created\r\n            // from arrays.\r\n            mountChildren(n2.children, container, fragmentEndAnchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n        }\r\n        else {\r\n            if (patchFlag > 0 &&\r\n                patchFlag & 64 /* STABLE_FRAGMENT */ &&\r\n                dynamicChildren &&\r\n                // #2715 the previous fragment could've been a BAILed one as a result\r\n                // of renderSlot() with no valid children\r\n                n1.dynamicChildren) {\r\n                // a stable fragment (template root or <template v-for>) doesn't need to\r\n                // patch children order, but it may contain dynamicChildren.\r\n                patchBlockChildren(n1.dynamicChildren, dynamicChildren, container, parentComponent, parentSuspense, isSVG, slotScopeIds);\r\n                if ((process.env.NODE_ENV !== 'production') && parentComponent && parentComponent.type.__hmrId) {\r\n                    traverseStaticChildren(n1, n2);\r\n                }\r\n                else if (\r\n                // #2080 if the stable fragment has a key, it's a <template v-for> that may\r\n                //  get moved around. Make sure all root level vnodes inherit el.\r\n                // #2134 or if it's a component root, it may also get moved around\r\n                // as the component is being moved.\r\n                n2.key != null ||\r\n                    (parentComponent && n2 === parentComponent.subTree)) {\r\n                    traverseStaticChildren(n1, n2, true /* shallow */);\r\n                }\r\n            }\r\n            else {\r\n                // keyed / unkeyed, or manual fragments.\r\n                // for keyed & unkeyed, since they are compiler generated from v-for,\r\n                // each child is guaranteed to be a block so the fragment will never\r\n                // have dynamicChildren.\r\n                patchChildren(n1, n2, container, fragmentEndAnchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n            }\r\n        }\r\n    };\r\n    const processComponent = (n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        n2.slotScopeIds = slotScopeIds;\r\n        if (n1 == null) {\r\n            if (n2.shapeFlag & 512 /* COMPONENT_KEPT_ALIVE */) {\r\n                parentComponent.ctx.activate(n2, container, anchor, isSVG, optimized);\r\n            }\r\n            else {\r\n                mountComponent(n2, container, anchor, parentComponent, parentSuspense, isSVG, optimized);\r\n            }\r\n        }\r\n        else {\r\n            updateComponent(n1, n2, optimized);\r\n        }\r\n    };\r\n    const mountComponent = (initialVNode, container, anchor, parentComponent, parentSuspense, isSVG, optimized) => {\r\n        const instance = (initialVNode.component = createComponentInstance(initialVNode, parentComponent, parentSuspense));\r\n        if ((process.env.NODE_ENV !== 'production') && instance.type.__hmrId) {\r\n            registerHMR(instance);\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            pushWarningContext(initialVNode);\r\n            startMeasure(instance, `mount`);\r\n        }\r\n        // inject renderer internals for keepAlive\r\n        if (isKeepAlive(initialVNode)) {\r\n            instance.ctx.renderer = internals;\r\n        }\r\n        // resolve props and slots for setup context\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            startMeasure(instance, `init`);\r\n        }\r\n        setupComponent(instance);\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            endMeasure(instance, `init`);\r\n        }\r\n        // setup() is async. This component relies on async logic to be resolved\r\n        // before proceeding\r\n        if (instance.asyncDep) {\r\n            parentSuspense && parentSuspense.registerDep(instance, setupRenderEffect);\r\n            // Give it a placeholder if this is not hydration\r\n            // TODO handle self-defined fallback\r\n            if (!initialVNode.el) {\r\n                const placeholder = (instance.subTree = createVNode(Comment));\r\n                processCommentNode(null, placeholder, container, anchor);\r\n            }\r\n            return;\r\n        }\r\n        setupRenderEffect(instance, initialVNode, container, anchor, parentSuspense, isSVG, optimized);\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            popWarningContext();\r\n            endMeasure(instance, `mount`);\r\n        }\r\n    };\r\n    const updateComponent = (n1, n2, optimized) => {\r\n        const instance = (n2.component = n1.component);\r\n        if (shouldUpdateComponent(n1, n2, optimized)) {\r\n            if (instance.asyncDep &&\r\n                !instance.asyncResolved) {\r\n                // async & still pending - just update props and slots\r\n                // since the component's reactive effect for render isn't set-up yet\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    pushWarningContext(n2);\r\n                }\r\n                updateComponentPreRender(instance, n2, optimized);\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    popWarningContext();\r\n                }\r\n                return;\r\n            }\r\n            else {\r\n                // normal update\r\n                instance.next = n2;\r\n                // in case the child component is also queued, remove it to avoid\r\n                // double updating the same child component in the same flush.\r\n                invalidateJob(instance.update);\r\n                // instance.update is the reactive effect runner.\r\n                instance.update();\r\n            }\r\n        }\r\n        else {\r\n            // no update needed. just copy over properties\r\n            n2.component = n1.component;\r\n            n2.el = n1.el;\r\n            instance.vnode = n2;\r\n        }\r\n    };\r\n    const setupRenderEffect = (instance, initialVNode, container, anchor, parentSuspense, isSVG, optimized) => {\r\n        // create reactive effect for rendering\r\n        instance.update = effect(function componentEffect() {\r\n            if (!instance.isMounted) {\r\n                let vnodeHook;\r\n                const { el, props } = initialVNode;\r\n                const { bm, m, parent } = instance;\r\n                // beforeMount hook\r\n                if (bm) {\r\n                    invokeArrayFns(bm);\r\n                }\r\n                // onVnodeBeforeMount\r\n                if ((vnodeHook = props && props.onVnodeBeforeMount)) {\r\n                    invokeVNodeHook(vnodeHook, parent, initialVNode);\r\n                }\r\n                // render\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    startMeasure(instance, `render`);\r\n                }\r\n                const subTree = (instance.subTree = renderComponentRoot(instance));\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    endMeasure(instance, `render`);\r\n                }\r\n                if (el && hydrateNode) {\r\n                    if ((process.env.NODE_ENV !== 'production')) {\r\n                        startMeasure(instance, `hydrate`);\r\n                    }\r\n                    // vnode has adopted host node - perform hydration instead of mount.\r\n                    hydrateNode(initialVNode.el, subTree, instance, parentSuspense, null);\r\n                    if ((process.env.NODE_ENV !== 'production')) {\r\n                        endMeasure(instance, `hydrate`);\r\n                    }\r\n                }\r\n                else {\r\n                    if ((process.env.NODE_ENV !== 'production')) {\r\n                        startMeasure(instance, `patch`);\r\n                    }\r\n                    patch(null, subTree, container, anchor, instance, parentSuspense, isSVG);\r\n                    if ((process.env.NODE_ENV !== 'production')) {\r\n                        endMeasure(instance, `patch`);\r\n                    }\r\n                    initialVNode.el = subTree.el;\r\n                }\r\n                // mounted hook\r\n                if (m) {\r\n                    queuePostRenderEffect(m, parentSuspense);\r\n                }\r\n                // onVnodeMounted\r\n                if ((vnodeHook = props && props.onVnodeMounted)) {\r\n                    const scopedInitialVNode = initialVNode;\r\n                    queuePostRenderEffect(() => {\r\n                        invokeVNodeHook(vnodeHook, parent, scopedInitialVNode);\r\n                    }, parentSuspense);\r\n                }\r\n                // activated hook for keep-alive roots.\r\n                // #1742 activated hook must be accessed after first render\r\n                // since the hook may be injected by a child keep-alive\r\n                const { a } = instance;\r\n                if (a &&\r\n                    initialVNode.shapeFlag & 256 /* COMPONENT_SHOULD_KEEP_ALIVE */) {\r\n                    queuePostRenderEffect(a, parentSuspense);\r\n                }\r\n                instance.isMounted = true;\r\n                if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n                    devtoolsComponentAdded(instance);\r\n                }\r\n                // #2458: deference mount-only object parameters to prevent memleaks\r\n                initialVNode = container = anchor = null;\r\n            }\r\n            else {\r\n                // updateComponent\r\n                // This is triggered by mutation of component's own state (next: null)\r\n                // OR parent calling processComponent (next: VNode)\r\n                let { next, bu, u, parent, vnode } = instance;\r\n                let originNext = next;\r\n                let vnodeHook;\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    pushWarningContext(next || instance.vnode);\r\n                }\r\n                if (next) {\r\n                    next.el = vnode.el;\r\n                    updateComponentPreRender(instance, next, optimized);\r\n                }\r\n                else {\r\n                    next = vnode;\r\n                }\r\n                // beforeUpdate hook\r\n                if (bu) {\r\n                    invokeArrayFns(bu);\r\n                }\r\n                // onVnodeBeforeUpdate\r\n                if ((vnodeHook = next.props && next.props.onVnodeBeforeUpdate)) {\r\n                    invokeVNodeHook(vnodeHook, parent, next, vnode);\r\n                }\r\n                // render\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    startMeasure(instance, `render`);\r\n                }\r\n                const nextTree = renderComponentRoot(instance);\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    endMeasure(instance, `render`);\r\n                }\r\n                const prevTree = instance.subTree;\r\n                instance.subTree = nextTree;\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    startMeasure(instance, `patch`);\r\n                }\r\n                patch(prevTree, nextTree, \r\n                // parent may have changed if it's in a teleport\r\n                hostParentNode(prevTree.el), \r\n                // anchor may have changed if it's in a fragment\r\n                getNextHostNode(prevTree), instance, parentSuspense, isSVG);\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    endMeasure(instance, `patch`);\r\n                }\r\n                next.el = nextTree.el;\r\n                if (originNext === null) {\r\n                    // self-triggered update. In case of HOC, update parent component\r\n                    // vnode el. HOC is indicated by parent instance's subTree pointing\r\n                    // to child component's vnode\r\n                    updateHOCHostEl(instance, nextTree.el);\r\n                }\r\n                // updated hook\r\n                if (u) {\r\n                    queuePostRenderEffect(u, parentSuspense);\r\n                }\r\n                // onVnodeUpdated\r\n                if ((vnodeHook = next.props && next.props.onVnodeUpdated)) {\r\n                    queuePostRenderEffect(() => {\r\n                        invokeVNodeHook(vnodeHook, parent, next, vnode);\r\n                    }, parentSuspense);\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n                    devtoolsComponentUpdated(instance);\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    popWarningContext();\r\n                }\r\n            }\r\n        }, (process.env.NODE_ENV !== 'production') ? createDevEffectOptions(instance) : prodEffectOptions);\r\n    };\r\n    const updateComponentPreRender = (instance, nextVNode, optimized) => {\r\n        nextVNode.component = instance;\r\n        const prevProps = instance.vnode.props;\r\n        instance.vnode = nextVNode;\r\n        instance.next = null;\r\n        updateProps(instance, nextVNode.props, prevProps, optimized);\r\n        updateSlots(instance, nextVNode.children, optimized);\r\n        pauseTracking();\r\n        // props update may have triggered pre-flush watchers.\r\n        // flush them before the render update.\r\n        flushPreFlushCbs(undefined, instance.update);\r\n        resetTracking();\r\n    };\r\n    const patchChildren = (n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized = false) => {\r\n        const c1 = n1 && n1.children;\r\n        const prevShapeFlag = n1 ? n1.shapeFlag : 0;\r\n        const c2 = n2.children;\r\n        const { patchFlag, shapeFlag } = n2;\r\n        // fast path\r\n        if (patchFlag > 0) {\r\n            if (patchFlag & 128 /* KEYED_FRAGMENT */) {\r\n                // this could be either fully-keyed or mixed (some keyed some not)\r\n                // presence of patchFlag means children are guaranteed to be arrays\r\n                patchKeyedChildren(c1, c2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                return;\r\n            }\r\n            else if (patchFlag & 256 /* UNKEYED_FRAGMENT */) {\r\n                // unkeyed\r\n                patchUnkeyedChildren(c1, c2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                return;\r\n            }\r\n        }\r\n        // children has 3 possibilities: text, array or no children.\r\n        if (shapeFlag & 8 /* TEXT_CHILDREN */) {\r\n            // text children fast path\r\n            if (prevShapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                unmountChildren(c1, parentComponent, parentSuspense);\r\n            }\r\n            if (c2 !== c1) {\r\n                hostSetElementText(container, c2);\r\n            }\r\n        }\r\n        else {\r\n            if (prevShapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                // prev children was array\r\n                if (shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                    // two arrays, cannot assume anything, do full diff\r\n                    patchKeyedChildren(c1, c2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                }\r\n                else {\r\n                    // no new children, just unmount old\r\n                    unmountChildren(c1, parentComponent, parentSuspense, true);\r\n                }\r\n            }\r\n            else {\r\n                // prev children was text OR null\r\n                // new children is array OR null\r\n                if (prevShapeFlag & 8 /* TEXT_CHILDREN */) {\r\n                    hostSetElementText(container, '');\r\n                }\r\n                // mount new if array\r\n                if (shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                    mountChildren(c2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                }\r\n            }\r\n        }\r\n    };\r\n    const patchUnkeyedChildren = (c1, c2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        c1 = c1 || EMPTY_ARR;\r\n        c2 = c2 || EMPTY_ARR;\r\n        const oldLength = c1.length;\r\n        const newLength = c2.length;\r\n        const commonLength = Math.min(oldLength, newLength);\r\n        let i;\r\n        for (i = 0; i < commonLength; i++) {\r\n            const nextChild = (c2[i] = optimized\r\n                ? cloneIfMounted(c2[i])\r\n                : normalizeVNode(c2[i]));\r\n            patch(c1[i], nextChild, container, null, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n        }\r\n        if (oldLength > newLength) {\r\n            // remove old\r\n            unmountChildren(c1, parentComponent, parentSuspense, true, false, commonLength);\r\n        }\r\n        else {\r\n            // mount new\r\n            mountChildren(c2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, commonLength);\r\n        }\r\n    };\r\n    // can be all-keyed or mixed\r\n    const patchKeyedChildren = (c1, c2, container, parentAnchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized) => {\r\n        let i = 0;\r\n        const l2 = c2.length;\r\n        let e1 = c1.length - 1; // prev ending index\r\n        let e2 = l2 - 1; // next ending index\r\n        // 1. sync from start\r\n        // (a b) c\r\n        // (a b) d e\r\n        while (i <= e1 && i <= e2) {\r\n            const n1 = c1[i];\r\n            const n2 = (c2[i] = optimized\r\n                ? cloneIfMounted(c2[i])\r\n                : normalizeVNode(c2[i]));\r\n            if (isSameVNodeType(n1, n2)) {\r\n                patch(n1, n2, container, null, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n            }\r\n            else {\r\n                break;\r\n            }\r\n            i++;\r\n        }\r\n        // 2. sync from end\r\n        // a (b c)\r\n        // d e (b c)\r\n        while (i <= e1 && i <= e2) {\r\n            const n1 = c1[e1];\r\n            const n2 = (c2[e2] = optimized\r\n                ? cloneIfMounted(c2[e2])\r\n                : normalizeVNode(c2[e2]));\r\n            if (isSameVNodeType(n1, n2)) {\r\n                patch(n1, n2, container, null, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n            }\r\n            else {\r\n                break;\r\n            }\r\n            e1--;\r\n            e2--;\r\n        }\r\n        // 3. common sequence + mount\r\n        // (a b)\r\n        // (a b) c\r\n        // i = 2, e1 = 1, e2 = 2\r\n        // (a b)\r\n        // c (a b)\r\n        // i = 0, e1 = -1, e2 = 0\r\n        if (i > e1) {\r\n            if (i <= e2) {\r\n                const nextPos = e2 + 1;\r\n                const anchor = nextPos < l2 ? c2[nextPos].el : parentAnchor;\r\n                while (i <= e2) {\r\n                    patch(null, (c2[i] = optimized\r\n                        ? cloneIfMounted(c2[i])\r\n                        : normalizeVNode(c2[i])), container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                    i++;\r\n                }\r\n            }\r\n        }\r\n        // 4. common sequence + unmount\r\n        // (a b) c\r\n        // (a b)\r\n        // i = 2, e1 = 2, e2 = 1\r\n        // a (b c)\r\n        // (b c)\r\n        // i = 0, e1 = 0, e2 = -1\r\n        else if (i > e2) {\r\n            while (i <= e1) {\r\n                unmount(c1[i], parentComponent, parentSuspense, true);\r\n                i++;\r\n            }\r\n        }\r\n        // 5. unknown sequence\r\n        // [i ... e1 + 1]: a b [c d e] f g\r\n        // [i ... e2 + 1]: a b [e d c h] f g\r\n        // i = 2, e1 = 4, e2 = 5\r\n        else {\r\n            const s1 = i; // prev starting index\r\n            const s2 = i; // next starting index\r\n            // 5.1 build key:index map for newChildren\r\n            const keyToNewIndexMap = new Map();\r\n            for (i = s2; i <= e2; i++) {\r\n                const nextChild = (c2[i] = optimized\r\n                    ? cloneIfMounted(c2[i])\r\n                    : normalizeVNode(c2[i]));\r\n                if (nextChild.key != null) {\r\n                    if ((process.env.NODE_ENV !== 'production') && keyToNewIndexMap.has(nextChild.key)) {\r\n                        warn(`Duplicate keys found during update:`, JSON.stringify(nextChild.key), `Make sure keys are unique.`);\r\n                    }\r\n                    keyToNewIndexMap.set(nextChild.key, i);\r\n                }\r\n            }\r\n            // 5.2 loop through old children left to be patched and try to patch\r\n            // matching nodes & remove nodes that are no longer present\r\n            let j;\r\n            let patched = 0;\r\n            const toBePatched = e2 - s2 + 1;\r\n            let moved = false;\r\n            // used to track whether any node has moved\r\n            let maxNewIndexSoFar = 0;\r\n            // works as Map<newIndex, oldIndex>\r\n            // Note that oldIndex is offset by +1\r\n            // and oldIndex = 0 is a special value indicating the new node has\r\n            // no corresponding old node.\r\n            // used for determining longest stable subsequence\r\n            const newIndexToOldIndexMap = new Array(toBePatched);\r\n            for (i = 0; i < toBePatched; i++)\r\n                newIndexToOldIndexMap[i] = 0;\r\n            for (i = s1; i <= e1; i++) {\r\n                const prevChild = c1[i];\r\n                if (patched >= toBePatched) {\r\n                    // all new children have been patched so this can only be a removal\r\n                    unmount(prevChild, parentComponent, parentSuspense, true);\r\n                    continue;\r\n                }\r\n                let newIndex;\r\n                if (prevChild.key != null) {\r\n                    newIndex = keyToNewIndexMap.get(prevChild.key);\r\n                }\r\n                else {\r\n                    // key-less node, try to locate a key-less node of the same type\r\n                    for (j = s2; j <= e2; j++) {\r\n                        if (newIndexToOldIndexMap[j - s2] === 0 &&\r\n                            isSameVNodeType(prevChild, c2[j])) {\r\n                            newIndex = j;\r\n                            break;\r\n                        }\r\n                    }\r\n                }\r\n                if (newIndex === undefined) {\r\n                    unmount(prevChild, parentComponent, parentSuspense, true);\r\n                }\r\n                else {\r\n                    newIndexToOldIndexMap[newIndex - s2] = i + 1;\r\n                    if (newIndex >= maxNewIndexSoFar) {\r\n                        maxNewIndexSoFar = newIndex;\r\n                    }\r\n                    else {\r\n                        moved = true;\r\n                    }\r\n                    patch(prevChild, c2[newIndex], container, null, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                    patched++;\r\n                }\r\n            }\r\n            // 5.3 move and mount\r\n            // generate longest stable subsequence only when nodes have moved\r\n            const increasingNewIndexSequence = moved\r\n                ? getSequence(newIndexToOldIndexMap)\r\n                : EMPTY_ARR;\r\n            j = increasingNewIndexSequence.length - 1;\r\n            // looping backwards so that we can use last patched node as anchor\r\n            for (i = toBePatched - 1; i >= 0; i--) {\r\n                const nextIndex = s2 + i;\r\n                const nextChild = c2[nextIndex];\r\n                const anchor = nextIndex + 1 < l2 ? c2[nextIndex + 1].el : parentAnchor;\r\n                if (newIndexToOldIndexMap[i] === 0) {\r\n                    // mount new\r\n                    patch(null, nextChild, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                }\r\n                else if (moved) {\r\n                    // move if:\r\n                    // There is no stable subsequence (e.g. a reverse)\r\n                    // OR current node is not among the stable sequence\r\n                    if (j < 0 || i !== increasingNewIndexSequence[j]) {\r\n                        move(nextChild, container, anchor, 2 /* REORDER */);\r\n                    }\r\n                    else {\r\n                        j--;\r\n                    }\r\n                }\r\n            }\r\n        }\r\n    };\r\n    const move = (vnode, container, anchor, moveType, parentSuspense = null) => {\r\n        const { el, type, transition, children, shapeFlag } = vnode;\r\n        if (shapeFlag & 6 /* COMPONENT */) {\r\n            move(vnode.component.subTree, container, anchor, moveType);\r\n            return;\r\n        }\r\n        if (shapeFlag & 128 /* SUSPENSE */) {\r\n            vnode.suspense.move(container, anchor, moveType);\r\n            return;\r\n        }\r\n        if (shapeFlag & 64 /* TELEPORT */) {\r\n            type.move(vnode, container, anchor, internals);\r\n            return;\r\n        }\r\n        if (type === Fragment) {\r\n            hostInsert(el, container, anchor);\r\n            for (let i = 0; i < children.length; i++) {\r\n                move(children[i], container, anchor, moveType);\r\n            }\r\n            hostInsert(vnode.anchor, container, anchor);\r\n            return;\r\n        }\r\n        if (type === Static) {\r\n            moveStaticNode(vnode, container, anchor);\r\n            return;\r\n        }\r\n        // single nodes\r\n        const needTransition = moveType !== 2 /* REORDER */ &&\r\n            shapeFlag & 1 /* ELEMENT */ &&\r\n            transition;\r\n        if (needTransition) {\r\n            if (moveType === 0 /* ENTER */) {\r\n                transition.beforeEnter(el);\r\n                hostInsert(el, container, anchor);\r\n                queuePostRenderEffect(() => transition.enter(el), parentSuspense);\r\n            }\r\n            else {\r\n                const { leave, delayLeave, afterLeave } = transition;\r\n                const remove = () => hostInsert(el, container, anchor);\r\n                const performLeave = () => {\r\n                    leave(el, () => {\r\n                        remove();\r\n                        afterLeave && afterLeave();\r\n                    });\r\n                };\r\n                if (delayLeave) {\r\n                    delayLeave(el, remove, performLeave);\r\n                }\r\n                else {\r\n                    performLeave();\r\n                }\r\n            }\r\n        }\r\n        else {\r\n            hostInsert(el, container, anchor);\r\n        }\r\n    };\r\n    const unmount = (vnode, parentComponent, parentSuspense, doRemove = false, optimized = false) => {\r\n        const { type, props, ref, children, dynamicChildren, shapeFlag, patchFlag, dirs } = vnode;\r\n        // unset ref\r\n        if (ref != null) {\r\n            setRef(ref, null, parentSuspense, null);\r\n        }\r\n        if (shapeFlag & 256 /* COMPONENT_SHOULD_KEEP_ALIVE */) {\r\n            parentComponent.ctx.deactivate(vnode);\r\n            return;\r\n        }\r\n        const shouldInvokeDirs = shapeFlag & 1 /* ELEMENT */ && dirs;\r\n        let vnodeHook;\r\n        if ((vnodeHook = props && props.onVnodeBeforeUnmount)) {\r\n            invokeVNodeHook(vnodeHook, parentComponent, vnode);\r\n        }\r\n        if (shapeFlag & 6 /* COMPONENT */) {\r\n            unmountComponent(vnode.component, parentSuspense, doRemove);\r\n        }\r\n        else {\r\n            if (shapeFlag & 128 /* SUSPENSE */) {\r\n                vnode.suspense.unmount(parentSuspense, doRemove);\r\n                return;\r\n            }\r\n            if (shouldInvokeDirs) {\r\n                invokeDirectiveHook(vnode, null, parentComponent, 'beforeUnmount');\r\n            }\r\n            if (shapeFlag & 64 /* TELEPORT */) {\r\n                vnode.type.remove(vnode, parentComponent, parentSuspense, optimized, internals, doRemove);\r\n            }\r\n            else if (dynamicChildren &&\r\n                // #1153: fast path should not be taken for non-stable (v-for) fragments\r\n                (type !== Fragment ||\r\n                    (patchFlag > 0 && patchFlag & 64 /* STABLE_FRAGMENT */))) {\r\n                // fast path for block nodes: only need to unmount dynamic children.\r\n                unmountChildren(dynamicChildren, parentComponent, parentSuspense, false, true);\r\n            }\r\n            else if ((type === Fragment &&\r\n                (patchFlag & 128 /* KEYED_FRAGMENT */ ||\r\n                    patchFlag & 256 /* UNKEYED_FRAGMENT */)) ||\r\n                (!optimized && shapeFlag & 16 /* ARRAY_CHILDREN */)) {\r\n                unmountChildren(children, parentComponent, parentSuspense);\r\n            }\r\n            if (doRemove) {\r\n                remove(vnode);\r\n            }\r\n        }\r\n        if ((vnodeHook = props && props.onVnodeUnmounted) || shouldInvokeDirs) {\r\n            queuePostRenderEffect(() => {\r\n                vnodeHook && invokeVNodeHook(vnodeHook, parentComponent, vnode);\r\n                shouldInvokeDirs &&\r\n                    invokeDirectiveHook(vnode, null, parentComponent, 'unmounted');\r\n            }, parentSuspense);\r\n        }\r\n    };\r\n    const remove = vnode => {\r\n        const { type, el, anchor, transition } = vnode;\r\n        if (type === Fragment) {\r\n            removeFragment(el, anchor);\r\n            return;\r\n        }\r\n        if (type === Static) {\r\n            removeStaticNode(vnode);\r\n            return;\r\n        }\r\n        const performRemove = () => {\r\n            hostRemove(el);\r\n            if (transition && !transition.persisted && transition.afterLeave) {\r\n                transition.afterLeave();\r\n            }\r\n        };\r\n        if (vnode.shapeFlag & 1 /* ELEMENT */ &&\r\n            transition &&\r\n            !transition.persisted) {\r\n            const { leave, delayLeave } = transition;\r\n            const performLeave = () => leave(el, performRemove);\r\n            if (delayLeave) {\r\n                delayLeave(vnode.el, performRemove, performLeave);\r\n            }\r\n            else {\r\n                performLeave();\r\n            }\r\n        }\r\n        else {\r\n            performRemove();\r\n        }\r\n    };\r\n    const removeFragment = (cur, end) => {\r\n        // For fragments, directly remove all contained DOM nodes.\r\n        // (fragment child nodes cannot have transition)\r\n        let next;\r\n        while (cur !== end) {\r\n            next = hostNextSibling(cur);\r\n            hostRemove(cur);\r\n            cur = next;\r\n        }\r\n        hostRemove(end);\r\n    };\r\n    const unmountComponent = (instance, parentSuspense, doRemove) => {\r\n        if ((process.env.NODE_ENV !== 'production') && instance.type.__hmrId) {\r\n            unregisterHMR(instance);\r\n        }\r\n        const { bum, effects, update, subTree, um } = instance;\r\n        // beforeUnmount hook\r\n        if (bum) {\r\n            invokeArrayFns(bum);\r\n        }\r\n        if (effects) {\r\n            for (let i = 0; i < effects.length; i++) {\r\n                stop(effects[i]);\r\n            }\r\n        }\r\n        // update may be null if a component is unmounted before its async\r\n        // setup has resolved.\r\n        if (update) {\r\n            stop(update);\r\n            unmount(subTree, instance, parentSuspense, doRemove);\r\n        }\r\n        // unmounted hook\r\n        if (um) {\r\n            queuePostRenderEffect(um, parentSuspense);\r\n        }\r\n        queuePostRenderEffect(() => {\r\n            instance.isUnmounted = true;\r\n        }, parentSuspense);\r\n        // A component with async dep inside a pending suspense is unmounted before\r\n        // its async dep resolves. This should remove the dep from the suspense, and\r\n        // cause the suspense to resolve immediately if that was the last dep.\r\n        if (parentSuspense &&\r\n            parentSuspense.pendingBranch &&\r\n            !parentSuspense.isUnmounted &&\r\n            instance.asyncDep &&\r\n            !instance.asyncResolved &&\r\n            instance.suspenseId === parentSuspense.pendingId) {\r\n            parentSuspense.deps--;\r\n            if (parentSuspense.deps === 0) {\r\n                parentSuspense.resolve();\r\n            }\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n            devtoolsComponentRemoved(instance);\r\n        }\r\n    };\r\n    const unmountChildren = (children, parentComponent, parentSuspense, doRemove = false, optimized = false, start = 0) => {\r\n        for (let i = start; i < children.length; i++) {\r\n            unmount(children[i], parentComponent, parentSuspense, doRemove, optimized);\r\n        }\r\n    };\r\n    const getNextHostNode = vnode => {\r\n        if (vnode.shapeFlag & 6 /* COMPONENT */) {\r\n            return getNextHostNode(vnode.component.subTree);\r\n        }\r\n        if (vnode.shapeFlag & 128 /* SUSPENSE */) {\r\n            return vnode.suspense.next();\r\n        }\r\n        return hostNextSibling((vnode.anchor || vnode.el));\r\n    };\r\n    const render = (vnode, container, isSVG) => {\r\n        if (vnode == null) {\r\n            if (container._vnode) {\r\n                unmount(container._vnode, null, null, true);\r\n            }\r\n        }\r\n        else {\r\n            patch(container._vnode || null, vnode, container, null, null, null, isSVG);\r\n        }\r\n        flushPostFlushCbs();\r\n        container._vnode = vnode;\r\n    };\r\n    const internals = {\r\n        p: patch,\r\n        um: unmount,\r\n        m: move,\r\n        r: remove,\r\n        mt: mountComponent,\r\n        mc: mountChildren,\r\n        pc: patchChildren,\r\n        pbc: patchBlockChildren,\r\n        n: getNextHostNode,\r\n        o: options\r\n    };\r\n    let hydrate;\r\n    let hydrateNode;\r\n    if (createHydrationFns) {\r\n        [hydrate, hydrateNode] = createHydrationFns(internals);\r\n    }\r\n    return {\r\n        render,\r\n        hydrate,\r\n        createApp: createAppAPI(render, hydrate)\r\n    };\r\n}\r\nfunction invokeVNodeHook(hook, instance, vnode, prevVNode = null) {\r\n    callWithAsyncErrorHandling(hook, instance, 7 /* VNODE_HOOK */, [\r\n        vnode,\r\n        prevVNode\r\n    ]);\r\n}\r\n/**\r\n * #1156\r\n * When a component is HMR-enabled, we need to make sure that all static nodes\r\n * inside a block also inherit the DOM element from the previous tree so that\r\n * HMR updates (which are full updates) can retrieve the element for patching.\r\n *\r\n * #2080\r\n * Inside keyed `template` fragment static children, if a fragment is moved,\r\n * the children will always moved so that need inherit el form previous nodes\r\n * to ensure correct moved position.\r\n */\r\nfunction traverseStaticChildren(n1, n2, shallow = false) {\r\n    const ch1 = n1.children;\r\n    const ch2 = n2.children;\r\n    if (isArray(ch1) && isArray(ch2)) {\r\n        for (let i = 0; i < ch1.length; i++) {\r\n            // this is only called in the optimized path so array children are\r\n            // guaranteed to be vnodes\r\n            const c1 = ch1[i];\r\n            let c2 = ch2[i];\r\n            if (c2.shapeFlag & 1 /* ELEMENT */ && !c2.dynamicChildren) {\r\n                if (c2.patchFlag <= 0 || c2.patchFlag === 32 /* HYDRATE_EVENTS */) {\r\n                    c2 = ch2[i] = cloneIfMounted(ch2[i]);\r\n                    c2.el = c1.el;\r\n                }\r\n                if (!shallow)\r\n                    traverseStaticChildren(c1, c2);\r\n            }\r\n            // also inherit for comment nodes, but not placeholders (e.g. v-if which\r\n            // would have received .el during block patch)\r\n            if ((process.env.NODE_ENV !== 'production') && c2.type === Comment && !c2.el) {\r\n                c2.el = c1.el;\r\n            }\r\n        }\r\n    }\r\n}\r\n// https://en.wikipedia.org/wiki/Longest_increasing_subsequence\r\nfunction getSequence(arr) {\r\n    const p = arr.slice();\r\n    const result = [0];\r\n    let i, j, u, v, c;\r\n    const len = arr.length;\r\n    for (i = 0; i < len; i++) {\r\n        const arrI = arr[i];\r\n        if (arrI !== 0) {\r\n            j = result[result.length - 1];\r\n            if (arr[j] < arrI) {\r\n                p[i] = j;\r\n                result.push(i);\r\n                continue;\r\n            }\r\n            u = 0;\r\n            v = result.length - 1;\r\n            while (u < v) {\r\n                c = ((u + v) / 2) | 0;\r\n                if (arr[result[c]] < arrI) {\r\n                    u = c + 1;\r\n                }\r\n                else {\r\n                    v = c;\r\n                }\r\n            }\r\n            if (arrI < arr[result[u]]) {\r\n                if (u > 0) {\r\n                    p[i] = result[u - 1];\r\n                }\r\n                result[u] = i;\r\n            }\r\n        }\r\n    }\r\n    u = result.length;\r\n    v = result[u - 1];\r\n    while (u-- > 0) {\r\n        result[u] = v;\r\n        v = p[v];\r\n    }\r\n    return result;\r\n}\n\nconst isTeleport = (type) => type.__isTeleport;\r\nconst isTeleportDisabled = (props) => props && (props.disabled || props.disabled === '');\r\nconst isTargetSVG = (target) => typeof SVGElement !== 'undefined' && target instanceof SVGElement;\r\nconst resolveTarget = (props, select) => {\r\n    const targetSelector = props && props.to;\r\n    if (isString(targetSelector)) {\r\n        if (!select) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(`Current renderer does not support string target for Teleports. ` +\r\n                    `(missing querySelector renderer option)`);\r\n            return null;\r\n        }\r\n        else {\r\n            const target = select(targetSelector);\r\n            if (!target) {\r\n                (process.env.NODE_ENV !== 'production') &&\r\n                    warn(`Failed to locate Teleport target with selector \"${targetSelector}\". ` +\r\n                        `Note the target element must exist before the component is mounted - ` +\r\n                        `i.e. the target cannot be rendered by the component itself, and ` +\r\n                        `ideally should be outside of the entire Vue component tree.`);\r\n            }\r\n            return target;\r\n        }\r\n    }\r\n    else {\r\n        if ((process.env.NODE_ENV !== 'production') && !targetSelector && !isTeleportDisabled(props)) {\r\n            warn(`Invalid Teleport target: ${targetSelector}`);\r\n        }\r\n        return targetSelector;\r\n    }\r\n};\r\nconst TeleportImpl = {\r\n    __isTeleport: true,\r\n    process(n1, n2, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized, internals) {\r\n        const { mc: mountChildren, pc: patchChildren, pbc: patchBlockChildren, o: { insert, querySelector, createText, createComment } } = internals;\r\n        const disabled = isTeleportDisabled(n2.props);\r\n        const { shapeFlag, children } = n2;\r\n        // #3302\r\n        // HMR updated, force full diff\r\n        if ((process.env.NODE_ENV !== 'production') && isHmrUpdating) {\r\n            optimized = false;\r\n            n2.dynamicChildren = null;\r\n        }\r\n        if (n1 == null) {\r\n            // insert anchors in the main view\r\n            const placeholder = (n2.el = (process.env.NODE_ENV !== 'production')\r\n                ? createComment('teleport start')\r\n                : createText(''));\r\n            const mainAnchor = (n2.anchor = (process.env.NODE_ENV !== 'production')\r\n                ? createComment('teleport end')\r\n                : createText(''));\r\n            insert(placeholder, container, anchor);\r\n            insert(mainAnchor, container, anchor);\r\n            const target = (n2.target = resolveTarget(n2.props, querySelector));\r\n            const targetAnchor = (n2.targetAnchor = createText(''));\r\n            if (target) {\r\n                insert(targetAnchor, target);\r\n                // #2652 we could be teleporting from a non-SVG tree into an SVG tree\r\n                isSVG = isSVG || isTargetSVG(target);\r\n            }\r\n            else if ((process.env.NODE_ENV !== 'production') && !disabled) {\r\n                warn('Invalid Teleport target on mount:', target, `(${typeof target})`);\r\n            }\r\n            const mount = (container, anchor) => {\r\n                // Teleport *always* has Array children. This is enforced in both the\r\n                // compiler and vnode children normalization.\r\n                if (shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                    mountChildren(children, container, anchor, parentComponent, parentSuspense, isSVG, slotScopeIds, optimized);\r\n                }\r\n            };\r\n            if (disabled) {\r\n                mount(container, mainAnchor);\r\n            }\r\n            else if (target) {\r\n                mount(target, targetAnchor);\r\n            }\r\n        }\r\n        else {\r\n            // update content\r\n            n2.el = n1.el;\r\n            const mainAnchor = (n2.anchor = n1.anchor);\r\n            const target = (n2.target = n1.target);\r\n            const targetAnchor = (n2.targetAnchor = n1.targetAnchor);\r\n            const wasDisabled = isTeleportDisabled(n1.props);\r\n            const currentContainer = wasDisabled ? container : target;\r\n            const currentAnchor = wasDisabled ? mainAnchor : targetAnchor;\r\n            isSVG = isSVG || isTargetSVG(target);\r\n            if (n2.dynamicChildren) {\r\n                // fast path when the teleport happens to be a block root\r\n                patchBlockChildren(n1.dynamicChildren, n2.dynamicChildren, currentContainer, parentComponent, parentSuspense, isSVG, slotScopeIds);\r\n                // even in block tree mode we need to make sure all root-level nodes\r\n                // in the teleport inherit previous DOM references so that they can\r\n                // be moved in future patches.\r\n                traverseStaticChildren(n1, n2, true);\r\n            }\r\n            else if (!optimized) {\r\n                patchChildren(n1, n2, currentContainer, currentAnchor, parentComponent, parentSuspense, isSVG, slotScopeIds, false);\r\n            }\r\n            if (disabled) {\r\n                if (!wasDisabled) {\r\n                    // enabled -> disabled\r\n                    // move into main container\r\n                    moveTeleport(n2, container, mainAnchor, internals, 1 /* TOGGLE */);\r\n                }\r\n            }\r\n            else {\r\n                // target changed\r\n                if ((n2.props && n2.props.to) !== (n1.props && n1.props.to)) {\r\n                    const nextTarget = (n2.target = resolveTarget(n2.props, querySelector));\r\n                    if (nextTarget) {\r\n                        moveTeleport(n2, nextTarget, null, internals, 0 /* TARGET_CHANGE */);\r\n                    }\r\n                    else if ((process.env.NODE_ENV !== 'production')) {\r\n                        warn('Invalid Teleport target on update:', target, `(${typeof target})`);\r\n                    }\r\n                }\r\n                else if (wasDisabled) {\r\n                    // disabled -> enabled\r\n                    // move into teleport target\r\n                    moveTeleport(n2, target, targetAnchor, internals, 1 /* TOGGLE */);\r\n                }\r\n            }\r\n        }\r\n    },\r\n    remove(vnode, parentComponent, parentSuspense, optimized, { um: unmount, o: { remove: hostRemove } }, doRemove) {\r\n        const { shapeFlag, children, anchor, targetAnchor, target, props } = vnode;\r\n        if (target) {\r\n            hostRemove(targetAnchor);\r\n        }\r\n        // an unmounted teleport should always remove its children if not disabled\r\n        if (doRemove || !isTeleportDisabled(props)) {\r\n            hostRemove(anchor);\r\n            if (shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n                for (let i = 0; i < children.length; i++) {\r\n                    unmount(children[i], parentComponent, parentSuspense, true, optimized);\r\n                }\r\n            }\r\n        }\r\n    },\r\n    move: moveTeleport,\r\n    hydrate: hydrateTeleport\r\n};\r\nfunction moveTeleport(vnode, container, parentAnchor, { o: { insert }, m: move }, moveType = 2 /* REORDER */) {\r\n    // move target anchor if this is a target change.\r\n    if (moveType === 0 /* TARGET_CHANGE */) {\r\n        insert(vnode.targetAnchor, container, parentAnchor);\r\n    }\r\n    const { el, anchor, shapeFlag, children, props } = vnode;\r\n    const isReorder = moveType === 2 /* REORDER */;\r\n    // move main view anchor if this is a re-order.\r\n    if (isReorder) {\r\n        insert(el, container, parentAnchor);\r\n    }\r\n    // if this is a re-order and teleport is enabled (content is in target)\r\n    // do not move children. So the opposite is: only move children if this\r\n    // is not a reorder, or the teleport is disabled\r\n    if (!isReorder || isTeleportDisabled(props)) {\r\n        // Teleport has either Array children or no children.\r\n        if (shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n            for (let i = 0; i < children.length; i++) {\r\n                move(children[i], container, parentAnchor, 2 /* REORDER */);\r\n            }\r\n        }\r\n    }\r\n    // move main view anchor if this is a re-order.\r\n    if (isReorder) {\r\n        insert(anchor, container, parentAnchor);\r\n    }\r\n}\r\nfunction hydrateTeleport(node, vnode, parentComponent, parentSuspense, slotScopeIds, optimized, { o: { nextSibling, parentNode, querySelector } }, hydrateChildren) {\r\n    const target = (vnode.target = resolveTarget(vnode.props, querySelector));\r\n    if (target) {\r\n        // if multiple teleports rendered to the same target element, we need to\r\n        // pick up from where the last teleport finished instead of the first node\r\n        const targetNode = target._lpa || target.firstChild;\r\n        if (vnode.shapeFlag & 16 /* ARRAY_CHILDREN */) {\r\n            if (isTeleportDisabled(vnode.props)) {\r\n                vnode.anchor = hydrateChildren(nextSibling(node), vnode, parentNode(node), parentComponent, parentSuspense, slotScopeIds, optimized);\r\n                vnode.targetAnchor = targetNode;\r\n            }\r\n            else {\r\n                vnode.anchor = nextSibling(node);\r\n                vnode.targetAnchor = hydrateChildren(targetNode, vnode, target, parentComponent, parentSuspense, slotScopeIds, optimized);\r\n            }\r\n            target._lpa =\r\n                vnode.targetAnchor && nextSibling(vnode.targetAnchor);\r\n        }\r\n    }\r\n    return vnode.anchor && nextSibling(vnode.anchor);\r\n}\r\n// Force-casted public typing for h and TSX props inference\r\nconst Teleport = TeleportImpl;\n\nconst COMPONENTS = 'components';\r\nconst DIRECTIVES = 'directives';\r\n/**\r\n * @private\r\n */\r\nfunction resolveComponent(name, maybeSelfReference) {\r\n    return resolveAsset(COMPONENTS, name, true, maybeSelfReference) || name;\r\n}\r\nconst NULL_DYNAMIC_COMPONENT = Symbol();\r\n/**\r\n * @private\r\n */\r\nfunction resolveDynamicComponent(component) {\r\n    if (isString(component)) {\r\n        return resolveAsset(COMPONENTS, component, false) || component;\r\n    }\r\n    else {\r\n        // invalid types will fallthrough to createVNode and raise warning\r\n        return (component || NULL_DYNAMIC_COMPONENT);\r\n    }\r\n}\r\n/**\r\n * @private\r\n */\r\nfunction resolveDirective(name) {\r\n    return resolveAsset(DIRECTIVES, name);\r\n}\r\n// implementation\r\nfunction resolveAsset(type, name, warnMissing = true, maybeSelfReference = false) {\r\n    const instance = currentRenderingInstance || currentInstance;\r\n    if (instance) {\r\n        const Component = instance.type;\r\n        // explicit self name has highest priority\r\n        if (type === COMPONENTS) {\r\n            const selfName = getComponentName(Component);\r\n            if (selfName &&\r\n                (selfName === name ||\r\n                    selfName === camelize(name) ||\r\n                    selfName === capitalize(camelize(name)))) {\r\n                return Component;\r\n            }\r\n        }\r\n        const res = \r\n        // local registration\r\n        // check instance[type] first for components with mixin or extends.\r\n        resolve(instance[type] || Component[type], name) ||\r\n            // global registration\r\n            resolve(instance.appContext[type], name);\r\n        if (!res && maybeSelfReference) {\r\n            // fallback to implicit self-reference\r\n            return Component;\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production') && warnMissing && !res) {\r\n            warn(`Failed to resolve ${type.slice(0, -1)}: ${name}`);\r\n        }\r\n        return res;\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        warn(`resolve${capitalize(type.slice(0, -1))} ` +\r\n            `can only be used in render() or setup().`);\r\n    }\r\n}\r\nfunction resolve(registry, name) {\r\n    return (registry &&\r\n        (registry[name] ||\r\n            registry[camelize(name)] ||\r\n            registry[capitalize(camelize(name))]));\r\n}\n\nconst Fragment = Symbol((process.env.NODE_ENV !== 'production') ? 'Fragment' : undefined);\r\nconst Text = Symbol((process.env.NODE_ENV !== 'production') ? 'Text' : undefined);\r\nconst Comment = Symbol((process.env.NODE_ENV !== 'production') ? 'Comment' : undefined);\r\nconst Static = Symbol((process.env.NODE_ENV !== 'production') ? 'Static' : undefined);\r\n// Since v-if and v-for are the two possible ways node structure can dynamically\r\n// change, once we consider v-if branches and each v-for fragment a block, we\r\n// can divide a template into nested blocks, and within each block the node\r\n// structure would be stable. This allows us to skip most children diffing\r\n// and only worry about the dynamic nodes (indicated by patch flags).\r\nconst blockStack = [];\r\nlet currentBlock = null;\r\n/**\r\n * Open a block.\r\n * This must be called before `createBlock`. It cannot be part of `createBlock`\r\n * because the children of the block are evaluated before `createBlock` itself\r\n * is called. The generated code typically looks like this:\r\n *\r\n * ```js\r\n * function render() {\r\n *   return (openBlock(),createBlock('div', null, [...]))\r\n * }\r\n * ```\r\n * disableTracking is true when creating a v-for fragment block, since a v-for\r\n * fragment always diffs its children.\r\n *\r\n * @private\r\n */\r\nfunction openBlock(disableTracking = false) {\r\n    blockStack.push((currentBlock = disableTracking ? null : []));\r\n}\r\nfunction closeBlock() {\r\n    blockStack.pop();\r\n    currentBlock = blockStack[blockStack.length - 1] || null;\r\n}\r\n// Whether we should be tracking dynamic child nodes inside a block.\r\n// Only tracks when this value is > 0\r\n// We are not using a simple boolean because this value may need to be\r\n// incremented/decremented by nested usage of v-once (see below)\r\nlet shouldTrack = 1;\r\n/**\r\n * Block tracking sometimes needs to be disabled, for example during the\r\n * creation of a tree that needs to be cached by v-once. The compiler generates\r\n * code like this:\r\n *\r\n * ``` js\r\n * _cache[1] || (\r\n *   setBlockTracking(-1),\r\n *   _cache[1] = createVNode(...),\r\n *   setBlockTracking(1),\r\n *   _cache[1]\r\n * )\r\n * ```\r\n *\r\n * @private\r\n */\r\nfunction setBlockTracking(value) {\r\n    shouldTrack += value;\r\n}\r\n/**\r\n * Create a block root vnode. Takes the same exact arguments as `createVNode`.\r\n * A block root keeps track of dynamic nodes within the block in the\r\n * `dynamicChildren` array.\r\n *\r\n * @private\r\n */\r\nfunction createBlock(type, props, children, patchFlag, dynamicProps) {\r\n    const vnode = createVNode(type, props, children, patchFlag, dynamicProps, true /* isBlock: prevent a block from tracking itself */);\r\n    // save current block children on the block vnode\r\n    vnode.dynamicChildren = currentBlock || EMPTY_ARR;\r\n    // close block\r\n    closeBlock();\r\n    // a block is always going to be patched, so track it as a child of its\r\n    // parent block\r\n    if (shouldTrack > 0 && currentBlock) {\r\n        currentBlock.push(vnode);\r\n    }\r\n    return vnode;\r\n}\r\nfunction isVNode(value) {\r\n    return value ? value.__v_isVNode === true : false;\r\n}\r\nfunction isSameVNodeType(n1, n2) {\r\n    if ((process.env.NODE_ENV !== 'production') &&\r\n        n2.shapeFlag & 6 /* COMPONENT */ &&\r\n        hmrDirtyComponents.has(n2.type)) {\r\n        // HMR only: if the component has been hot-updated, force a reload.\r\n        return false;\r\n    }\r\n    return n1.type === n2.type && n1.key === n2.key;\r\n}\r\nlet vnodeArgsTransformer;\r\n/**\r\n * Internal API for registering an arguments transform for createVNode\r\n * used for creating stubs in the test-utils\r\n * It is *internal* but needs to be exposed for test-utils to pick up proper\r\n * typings\r\n */\r\nfunction transformVNodeArgs(transformer) {\r\n    vnodeArgsTransformer = transformer;\r\n}\r\nconst createVNodeWithArgsTransform = (...args) => {\r\n    return _createVNode(...(vnodeArgsTransformer\r\n        ? vnodeArgsTransformer(args, currentRenderingInstance)\r\n        : args));\r\n};\r\nconst InternalObjectKey = `__vInternal`;\r\nconst normalizeKey = ({ key }) => key != null ? key : null;\r\nconst normalizeRef = ({ ref }) => {\r\n    return (ref != null\r\n        ? isString(ref) || isRef(ref) || isFunction(ref)\r\n            ? { i: currentRenderingInstance, r: ref }\r\n            : ref\r\n        : null);\r\n};\r\nconst createVNode = ((process.env.NODE_ENV !== 'production')\r\n    ? createVNodeWithArgsTransform\r\n    : _createVNode);\r\nfunction _createVNode(type, props = null, children = null, patchFlag = 0, dynamicProps = null, isBlockNode = false) {\r\n    if (!type || type === NULL_DYNAMIC_COMPONENT) {\r\n        if ((process.env.NODE_ENV !== 'production') && !type) {\r\n            warn(`Invalid vnode type when creating vnode: ${type}.`);\r\n        }\r\n        type = Comment;\r\n    }\r\n    if (isVNode(type)) {\r\n        // createVNode receiving an existing vnode. This happens in cases like\r\n        // <component :is=\"vnode\"/>\r\n        // #2078 make sure to merge refs during the clone instead of overwriting it\r\n        const cloned = cloneVNode(type, props, true /* mergeRef: true */);\r\n        if (children) {\r\n            normalizeChildren(cloned, children);\r\n        }\r\n        return cloned;\r\n    }\r\n    // class component normalization.\r\n    if (isClassComponent(type)) {\r\n        type = type.__vccOpts;\r\n    }\r\n    // class & style normalization.\r\n    if (props) {\r\n        // for reactive or proxy objects, we need to clone it to enable mutation.\r\n        if (isProxy(props) || InternalObjectKey in props) {\r\n            props = extend({}, props);\r\n        }\r\n        let { class: klass, style } = props;\r\n        if (klass && !isString(klass)) {\r\n            props.class = normalizeClass(klass);\r\n        }\r\n        if (isObject(style)) {\r\n            // reactive state objects need to be cloned since they are likely to be\r\n            // mutated\r\n            if (isProxy(style) && !isArray(style)) {\r\n                style = extend({}, style);\r\n            }\r\n            props.style = normalizeStyle(style);\r\n        }\r\n    }\r\n    // encode the vnode type information into a bitmap\r\n    const shapeFlag = isString(type)\r\n        ? 1 /* ELEMENT */\r\n        : isSuspense(type)\r\n            ? 128 /* SUSPENSE */\r\n            : isTeleport(type)\r\n                ? 64 /* TELEPORT */\r\n                : isObject(type)\r\n                    ? 4 /* STATEFUL_COMPONENT */\r\n                    : isFunction(type)\r\n                        ? 2 /* FUNCTIONAL_COMPONENT */\r\n                        : 0;\r\n    if ((process.env.NODE_ENV !== 'production') && shapeFlag & 4 /* STATEFUL_COMPONENT */ && isProxy(type)) {\r\n        type = toRaw(type);\r\n        warn(`Vue received a Component which was made a reactive object. This can ` +\r\n            `lead to unnecessary performance overhead, and should be avoided by ` +\r\n            `marking the component with \\`markRaw\\` or using \\`shallowRef\\` ` +\r\n            `instead of \\`ref\\`.`, `\\nComponent that was made reactive: `, type);\r\n    }\r\n    const vnode = {\r\n        __v_isVNode: true,\r\n        [\"__v_skip\" /* SKIP */]: true,\r\n        type,\r\n        props,\r\n        key: props && normalizeKey(props),\r\n        ref: props && normalizeRef(props),\r\n        scopeId: currentScopeId,\r\n        slotScopeIds: null,\r\n        children: null,\r\n        component: null,\r\n        suspense: null,\r\n        ssContent: null,\r\n        ssFallback: null,\r\n        dirs: null,\r\n        transition: null,\r\n        el: null,\r\n        anchor: null,\r\n        target: null,\r\n        targetAnchor: null,\r\n        staticCount: 0,\r\n        shapeFlag,\r\n        patchFlag,\r\n        dynamicProps,\r\n        dynamicChildren: null,\r\n        appContext: null\r\n    };\r\n    // validate key\r\n    if ((process.env.NODE_ENV !== 'production') && vnode.key !== vnode.key) {\r\n        warn(`VNode created with invalid key (NaN). VNode type:`, vnode.type);\r\n    }\r\n    normalizeChildren(vnode, children);\r\n    // normalize suspense children\r\n    if (shapeFlag & 128 /* SUSPENSE */) {\r\n        const { content, fallback } = normalizeSuspenseChildren(vnode);\r\n        vnode.ssContent = content;\r\n        vnode.ssFallback = fallback;\r\n    }\r\n    if (shouldTrack > 0 &&\r\n        // avoid a block node from tracking itself\r\n        !isBlockNode &&\r\n        // has current parent block\r\n        currentBlock &&\r\n        // presence of a patch flag indicates this node needs patching on updates.\r\n        // component nodes also should always be patched, because even if the\r\n        // component doesn't need to update, it needs to persist the instance on to\r\n        // the next vnode so that it can be properly unmounted later.\r\n        (patchFlag > 0 || shapeFlag & 6 /* COMPONENT */) &&\r\n        // the EVENTS flag is only for hydration and if it is the only flag, the\r\n        // vnode should not be considered dynamic due to handler caching.\r\n        patchFlag !== 32 /* HYDRATE_EVENTS */) {\r\n        currentBlock.push(vnode);\r\n    }\r\n    return vnode;\r\n}\r\nfunction cloneVNode(vnode, extraProps, mergeRef = false) {\r\n    // This is intentionally NOT using spread or extend to avoid the runtime\r\n    // key enumeration cost.\r\n    const { props, ref, patchFlag, children } = vnode;\r\n    const mergedProps = extraProps ? mergeProps(props || {}, extraProps) : props;\r\n    return {\r\n        __v_isVNode: true,\r\n        [\"__v_skip\" /* SKIP */]: true,\r\n        type: vnode.type,\r\n        props: mergedProps,\r\n        key: mergedProps && normalizeKey(mergedProps),\r\n        ref: extraProps && extraProps.ref\r\n            ? // #2078 in the case of <component :is=\"vnode\" ref=\"extra\"/>\r\n                // if the vnode itself already has a ref, cloneVNode will need to merge\r\n                // the refs so the single vnode can be set on multiple refs\r\n                mergeRef && ref\r\n                    ? isArray(ref)\r\n                        ? ref.concat(normalizeRef(extraProps))\r\n                        : [ref, normalizeRef(extraProps)]\r\n                    : normalizeRef(extraProps)\r\n            : ref,\r\n        scopeId: vnode.scopeId,\r\n        slotScopeIds: vnode.slotScopeIds,\r\n        children: (process.env.NODE_ENV !== 'production') && patchFlag === -1 /* HOISTED */ && isArray(children)\r\n            ? children.map(deepCloneVNode)\r\n            : children,\r\n        target: vnode.target,\r\n        targetAnchor: vnode.targetAnchor,\r\n        staticCount: vnode.staticCount,\r\n        shapeFlag: vnode.shapeFlag,\r\n        // if the vnode is cloned with extra props, we can no longer assume its\r\n        // existing patch flag to be reliable and need to add the FULL_PROPS flag.\r\n        // note: perserve flag for fragments since they use the flag for children\r\n        // fast paths only.\r\n        patchFlag: extraProps && vnode.type !== Fragment\r\n            ? patchFlag === -1 // hoisted node\r\n                ? 16 /* FULL_PROPS */\r\n                : patchFlag | 16 /* FULL_PROPS */\r\n            : patchFlag,\r\n        dynamicProps: vnode.dynamicProps,\r\n        dynamicChildren: vnode.dynamicChildren,\r\n        appContext: vnode.appContext,\r\n        dirs: vnode.dirs,\r\n        transition: vnode.transition,\r\n        // These should technically only be non-null on mounted VNodes. However,\r\n        // they *should* be copied for kept-alive vnodes. So we just always copy\r\n        // them since them being non-null during a mount doesn't affect the logic as\r\n        // they will simply be overwritten.\r\n        component: vnode.component,\r\n        suspense: vnode.suspense,\r\n        ssContent: vnode.ssContent && cloneVNode(vnode.ssContent),\r\n        ssFallback: vnode.ssFallback && cloneVNode(vnode.ssFallback),\r\n        el: vnode.el,\r\n        anchor: vnode.anchor\r\n    };\r\n}\r\n/**\r\n * Dev only, for HMR of hoisted vnodes reused in v-for\r\n * https://github.com/vitejs/vite/issues/2022\r\n */\r\nfunction deepCloneVNode(vnode) {\r\n    const cloned = cloneVNode(vnode);\r\n    if (isArray(vnode.children)) {\r\n        cloned.children = vnode.children.map(deepCloneVNode);\r\n    }\r\n    return cloned;\r\n}\r\n/**\r\n * @private\r\n */\r\nfunction createTextVNode(text = ' ', flag = 0) {\r\n    return createVNode(Text, null, text, flag);\r\n}\r\n/**\r\n * @private\r\n */\r\nfunction createStaticVNode(content, numberOfNodes) {\r\n    // A static vnode can contain multiple stringified elements, and the number\r\n    // of elements is necessary for hydration.\r\n    const vnode = createVNode(Static, null, content);\r\n    vnode.staticCount = numberOfNodes;\r\n    return vnode;\r\n}\r\n/**\r\n * @private\r\n */\r\nfunction createCommentVNode(text = '', \r\n// when used as the v-else branch, the comment node must be created as a\r\n// block to ensure correct updates.\r\nasBlock = false) {\r\n    return asBlock\r\n        ? (openBlock(), createBlock(Comment, null, text))\r\n        : createVNode(Comment, null, text);\r\n}\r\nfunction normalizeVNode(child) {\r\n    if (child == null || typeof child === 'boolean') {\r\n        // empty placeholder\r\n        return createVNode(Comment);\r\n    }\r\n    else if (isArray(child)) {\r\n        // fragment\r\n        return createVNode(Fragment, null, child);\r\n    }\r\n    else if (typeof child === 'object') {\r\n        // already vnode, this should be the most common since compiled templates\r\n        // always produce all-vnode children arrays\r\n        return child.el === null ? child : cloneVNode(child);\r\n    }\r\n    else {\r\n        // strings and numbers\r\n        return createVNode(Text, null, String(child));\r\n    }\r\n}\r\n// optimized normalization for template-compiled render fns\r\nfunction cloneIfMounted(child) {\r\n    return child.el === null ? child : cloneVNode(child);\r\n}\r\nfunction normalizeChildren(vnode, children) {\r\n    let type = 0;\r\n    const { shapeFlag } = vnode;\r\n    if (children == null) {\r\n        children = null;\r\n    }\r\n    else if (isArray(children)) {\r\n        type = 16 /* ARRAY_CHILDREN */;\r\n    }\r\n    else if (typeof children === 'object') {\r\n        if (shapeFlag & 1 /* ELEMENT */ || shapeFlag & 64 /* TELEPORT */) {\r\n            // Normalize slot to plain children for plain element and Teleport\r\n            const slot = children.default;\r\n            if (slot) {\r\n                // _c marker is added by withCtx() indicating this is a compiled slot\r\n                slot._c && setCompiledSlotRendering(1);\r\n                normalizeChildren(vnode, slot());\r\n                slot._c && setCompiledSlotRendering(-1);\r\n            }\r\n            return;\r\n        }\r\n        else {\r\n            type = 32 /* SLOTS_CHILDREN */;\r\n            const slotFlag = children._;\r\n            if (!slotFlag && !(InternalObjectKey in children)) {\r\n                children._ctx = currentRenderingInstance;\r\n            }\r\n            else if (slotFlag === 3 /* FORWARDED */ && currentRenderingInstance) {\r\n                // a child component receives forwarded slots from the parent.\r\n                // its slot type is determined by its parent's slot type.\r\n                if (currentRenderingInstance.vnode.patchFlag & 1024 /* DYNAMIC_SLOTS */) {\r\n                    children._ = 2 /* DYNAMIC */;\r\n                    vnode.patchFlag |= 1024 /* DYNAMIC_SLOTS */;\r\n                }\r\n                else {\r\n                    children._ = 1 /* STABLE */;\r\n                }\r\n            }\r\n        }\r\n    }\r\n    else if (isFunction(children)) {\r\n        children = { default: children, _ctx: currentRenderingInstance };\r\n        type = 32 /* SLOTS_CHILDREN */;\r\n    }\r\n    else {\r\n        children = String(children);\r\n        // force teleport children to array so it can be moved around\r\n        if (shapeFlag & 64 /* TELEPORT */) {\r\n            type = 16 /* ARRAY_CHILDREN */;\r\n            children = [createTextVNode(children)];\r\n        }\r\n        else {\r\n            type = 8 /* TEXT_CHILDREN */;\r\n        }\r\n    }\r\n    vnode.children = children;\r\n    vnode.shapeFlag |= type;\r\n}\r\nfunction mergeProps(...args) {\r\n    const ret = extend({}, args[0]);\r\n    for (let i = 1; i < args.length; i++) {\r\n        const toMerge = args[i];\r\n        for (const key in toMerge) {\r\n            if (key === 'class') {\r\n                if (ret.class !== toMerge.class) {\r\n                    ret.class = normalizeClass([ret.class, toMerge.class]);\r\n                }\r\n            }\r\n            else if (key === 'style') {\r\n                ret.style = normalizeStyle([ret.style, toMerge.style]);\r\n            }\r\n            else if (isOn(key)) {\r\n                const existing = ret[key];\r\n                const incoming = toMerge[key];\r\n                if (existing !== incoming) {\r\n                    ret[key] = existing\r\n                        ? [].concat(existing, toMerge[key])\r\n                        : incoming;\r\n                }\r\n            }\r\n            else if (key !== '') {\r\n                ret[key] = toMerge[key];\r\n            }\r\n        }\r\n    }\r\n    return ret;\r\n}\n\nfunction provide(key, value) {\r\n    if (!currentInstance) {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            warn(`provide() can only be used inside setup().`);\r\n        }\r\n    }\r\n    else {\r\n        let provides = currentInstance.provides;\r\n        // by default an instance inherits its parent's provides object\r\n        // but when it needs to provide values of its own, it creates its\r\n        // own provides object using parent provides object as prototype.\r\n        // this way in `inject` we can simply look up injections from direct\r\n        // parent and let the prototype chain do the work.\r\n        const parentProvides = currentInstance.parent && currentInstance.parent.provides;\r\n        if (parentProvides === provides) {\r\n            provides = currentInstance.provides = Object.create(parentProvides);\r\n        }\r\n        // TS doesn't allow symbol as index type\r\n        provides[key] = value;\r\n    }\r\n}\r\nfunction inject(key, defaultValue, treatDefaultAsFactory = false) {\r\n    // fallback to `currentRenderingInstance` so that this can be called in\r\n    // a functional component\r\n    const instance = currentInstance || currentRenderingInstance;\r\n    if (instance) {\r\n        // #2400\r\n        // to support `app.use` plugins,\r\n        // fallback to appContext's `provides` if the intance is at root\r\n        const provides = instance.parent == null\r\n            ? instance.vnode.appContext && instance.vnode.appContext.provides\r\n            : instance.parent.provides;\r\n        if (provides && key in provides) {\r\n            // TS doesn't allow symbol as index type\r\n            return provides[key];\r\n        }\r\n        else if (arguments.length > 1) {\r\n            return treatDefaultAsFactory && isFunction(defaultValue)\r\n                ? defaultValue()\r\n                : defaultValue;\r\n        }\r\n        else if ((process.env.NODE_ENV !== 'production')) {\r\n            warn(`injection \"${String(key)}\" not found.`);\r\n        }\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        warn(`inject() can only be used inside setup() or functional components.`);\r\n    }\r\n}\n\nfunction createDuplicateChecker() {\r\n    const cache = Object.create(null);\r\n    return (type, key) => {\r\n        if (cache[key]) {\r\n            warn(`${type} property \"${key}\" is already defined in ${cache[key]}.`);\r\n        }\r\n        else {\r\n            cache[key] = type;\r\n        }\r\n    };\r\n}\r\nlet shouldCacheAccess = true;\r\nfunction applyOptions(instance, options, deferredData = [], deferredWatch = [], deferredProvide = [], asMixin = false) {\r\n    const { \r\n    // composition\r\n    mixins, extends: extendsOptions, \r\n    // state\r\n    data: dataOptions, computed: computedOptions, methods, watch: watchOptions, provide: provideOptions, inject: injectOptions, \r\n    // assets\r\n    components, directives, \r\n    // lifecycle\r\n    beforeMount, mounted, beforeUpdate, updated, activated, deactivated, beforeDestroy, beforeUnmount, destroyed, unmounted, render, renderTracked, renderTriggered, errorCaptured, \r\n    // public API\r\n    expose } = options;\r\n    const publicThis = instance.proxy;\r\n    const ctx = instance.ctx;\r\n    const globalMixins = instance.appContext.mixins;\r\n    if (asMixin && render && instance.render === NOOP) {\r\n        instance.render = render;\r\n    }\r\n    // applyOptions is called non-as-mixin once per instance\r\n    if (!asMixin) {\r\n        shouldCacheAccess = false;\r\n        callSyncHook('beforeCreate', \"bc\" /* BEFORE_CREATE */, options, instance, globalMixins);\r\n        shouldCacheAccess = true;\r\n        // global mixins are applied first\r\n        applyMixins(instance, globalMixins, deferredData, deferredWatch, deferredProvide);\r\n    }\r\n    // extending a base component...\r\n    if (extendsOptions) {\r\n        applyOptions(instance, extendsOptions, deferredData, deferredWatch, deferredProvide, true);\r\n    }\r\n    // local mixins\r\n    if (mixins) {\r\n        applyMixins(instance, mixins, deferredData, deferredWatch, deferredProvide);\r\n    }\r\n    const checkDuplicateProperties = (process.env.NODE_ENV !== 'production') ? createDuplicateChecker() : null;\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        const [propsOptions] = instance.propsOptions;\r\n        if (propsOptions) {\r\n            for (const key in propsOptions) {\r\n                checkDuplicateProperties(\"Props\" /* PROPS */, key);\r\n            }\r\n        }\r\n    }\r\n    // options initialization order (to be consistent with Vue 2):\r\n    // - props (already done outside of this function)\r\n    // - inject\r\n    // - methods\r\n    // - data (deferred since it relies on `this` access)\r\n    // - computed\r\n    // - watch (deferred since it relies on `this` access)\r\n    if (injectOptions) {\r\n        if (isArray(injectOptions)) {\r\n            for (let i = 0; i < injectOptions.length; i++) {\r\n                const key = injectOptions[i];\r\n                ctx[key] = inject(key);\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    checkDuplicateProperties(\"Inject\" /* INJECT */, key);\r\n                }\r\n            }\r\n        }\r\n        else {\r\n            for (const key in injectOptions) {\r\n                const opt = injectOptions[key];\r\n                if (isObject(opt)) {\r\n                    ctx[key] = inject(opt.from || key, opt.default, true /* treat default function as factory */);\r\n                }\r\n                else {\r\n                    ctx[key] = inject(opt);\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    checkDuplicateProperties(\"Inject\" /* INJECT */, key);\r\n                }\r\n            }\r\n        }\r\n    }\r\n    if (methods) {\r\n        for (const key in methods) {\r\n            const methodHandler = methods[key];\r\n            if (isFunction(methodHandler)) {\r\n                // In dev mode, we use the `createRenderContext` function to define methods to the proxy target,\r\n                // and those are read-only but reconfigurable, so it needs to be redefined here\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    Object.defineProperty(ctx, key, {\r\n                        value: methodHandler.bind(publicThis),\r\n                        configurable: true,\r\n                        enumerable: true,\r\n                        writable: true\r\n                    });\r\n                }\r\n                else {\r\n                    ctx[key] = methodHandler.bind(publicThis);\r\n                }\r\n                if ((process.env.NODE_ENV !== 'production')) {\r\n                    checkDuplicateProperties(\"Methods\" /* METHODS */, key);\r\n                }\r\n            }\r\n            else if ((process.env.NODE_ENV !== 'production')) {\r\n                warn(`Method \"${key}\" has type \"${typeof methodHandler}\" in the component definition. ` +\r\n                    `Did you reference the function correctly?`);\r\n            }\r\n        }\r\n    }\r\n    if (!asMixin) {\r\n        if (deferredData.length) {\r\n            deferredData.forEach(dataFn => resolveData(instance, dataFn, publicThis));\r\n        }\r\n        if (dataOptions) {\r\n            // @ts-ignore dataOptions is not fully type safe\r\n            resolveData(instance, dataOptions, publicThis);\r\n        }\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            const rawData = toRaw(instance.data);\r\n            for (const key in rawData) {\r\n                checkDuplicateProperties(\"Data\" /* DATA */, key);\r\n                // expose data on ctx during dev\r\n                if (key[0] !== '$' && key[0] !== '_') {\r\n                    Object.defineProperty(ctx, key, {\r\n                        configurable: true,\r\n                        enumerable: true,\r\n                        get: () => rawData[key],\r\n                        set: NOOP\r\n                    });\r\n                }\r\n            }\r\n        }\r\n    }\r\n    else if (dataOptions) {\r\n        deferredData.push(dataOptions);\r\n    }\r\n    if (computedOptions) {\r\n        for (const key in computedOptions) {\r\n            const opt = computedOptions[key];\r\n            const get = isFunction(opt)\r\n                ? opt.bind(publicThis, publicThis)\r\n                : isFunction(opt.get)\r\n                    ? opt.get.bind(publicThis, publicThis)\r\n                    : NOOP;\r\n            if ((process.env.NODE_ENV !== 'production') && get === NOOP) {\r\n                warn(`Computed property \"${key}\" has no getter.`);\r\n            }\r\n            const set = !isFunction(opt) && isFunction(opt.set)\r\n                ? opt.set.bind(publicThis)\r\n                : (process.env.NODE_ENV !== 'production')\r\n                    ? () => {\r\n                        warn(`Write operation failed: computed property \"${key}\" is readonly.`);\r\n                    }\r\n                    : NOOP;\r\n            const c = computed({\r\n                get,\r\n                set\r\n            });\r\n            Object.defineProperty(ctx, key, {\r\n                enumerable: true,\r\n                configurable: true,\r\n                get: () => c.value,\r\n                set: v => (c.value = v)\r\n            });\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                checkDuplicateProperties(\"Computed\" /* COMPUTED */, key);\r\n            }\r\n        }\r\n    }\r\n    if (watchOptions) {\r\n        deferredWatch.push(watchOptions);\r\n    }\r\n    if (!asMixin && deferredWatch.length) {\r\n        deferredWatch.forEach(watchOptions => {\r\n            for (const key in watchOptions) {\r\n                createWatcher(watchOptions[key], ctx, publicThis, key);\r\n            }\r\n        });\r\n    }\r\n    if (provideOptions) {\r\n        deferredProvide.push(provideOptions);\r\n    }\r\n    if (!asMixin && deferredProvide.length) {\r\n        deferredProvide.forEach(provideOptions => {\r\n            const provides = isFunction(provideOptions)\r\n                ? provideOptions.call(publicThis)\r\n                : provideOptions;\r\n            Reflect.ownKeys(provides).forEach(key => {\r\n                provide(key, provides[key]);\r\n            });\r\n        });\r\n    }\r\n    // asset options.\r\n    // To reduce memory usage, only components with mixins or extends will have\r\n    // resolved asset registry attached to instance.\r\n    if (asMixin) {\r\n        if (components) {\r\n            extend(instance.components ||\r\n                (instance.components = extend({}, instance.type.components)), components);\r\n        }\r\n        if (directives) {\r\n            extend(instance.directives ||\r\n                (instance.directives = extend({}, instance.type.directives)), directives);\r\n        }\r\n    }\r\n    // lifecycle options\r\n    if (!asMixin) {\r\n        callSyncHook('created', \"c\" /* CREATED */, options, instance, globalMixins);\r\n    }\r\n    if (beforeMount) {\r\n        onBeforeMount(beforeMount.bind(publicThis));\r\n    }\r\n    if (mounted) {\r\n        onMounted(mounted.bind(publicThis));\r\n    }\r\n    if (beforeUpdate) {\r\n        onBeforeUpdate(beforeUpdate.bind(publicThis));\r\n    }\r\n    if (updated) {\r\n        onUpdated(updated.bind(publicThis));\r\n    }\r\n    if (activated) {\r\n        onActivated(activated.bind(publicThis));\r\n    }\r\n    if (deactivated) {\r\n        onDeactivated(deactivated.bind(publicThis));\r\n    }\r\n    if (errorCaptured) {\r\n        onErrorCaptured(errorCaptured.bind(publicThis));\r\n    }\r\n    if (renderTracked) {\r\n        onRenderTracked(renderTracked.bind(publicThis));\r\n    }\r\n    if (renderTriggered) {\r\n        onRenderTriggered(renderTriggered.bind(publicThis));\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && beforeDestroy) {\r\n        warn(`\\`beforeDestroy\\` has been renamed to \\`beforeUnmount\\`.`);\r\n    }\r\n    if (beforeUnmount) {\r\n        onBeforeUnmount(beforeUnmount.bind(publicThis));\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') && destroyed) {\r\n        warn(`\\`destroyed\\` has been renamed to \\`unmounted\\`.`);\r\n    }\r\n    if (unmounted) {\r\n        onUnmounted(unmounted.bind(publicThis));\r\n    }\r\n    if (isArray(expose)) {\r\n        if (!asMixin) {\r\n            if (expose.length) {\r\n                const exposed = instance.exposed || (instance.exposed = proxyRefs({}));\r\n                expose.forEach(key => {\r\n                    exposed[key] = toRef(publicThis, key);\r\n                });\r\n            }\r\n            else if (!instance.exposed) {\r\n                instance.exposed = EMPTY_OBJ;\r\n            }\r\n        }\r\n        else if ((process.env.NODE_ENV !== 'production')) {\r\n            warn(`The \\`expose\\` option is ignored when used in mixins.`);\r\n        }\r\n    }\r\n}\r\nfunction callSyncHook(name, type, options, instance, globalMixins) {\r\n    for (let i = 0; i < globalMixins.length; i++) {\r\n        callHookWithMixinAndExtends(name, type, globalMixins[i], instance);\r\n    }\r\n    callHookWithMixinAndExtends(name, type, options, instance);\r\n}\r\nfunction callHookWithMixinAndExtends(name, type, options, instance) {\r\n    const { extends: base, mixins } = options;\r\n    const selfHook = options[name];\r\n    if (base) {\r\n        callHookWithMixinAndExtends(name, type, base, instance);\r\n    }\r\n    if (mixins) {\r\n        for (let i = 0; i < mixins.length; i++) {\r\n            callHookWithMixinAndExtends(name, type, mixins[i], instance);\r\n        }\r\n    }\r\n    if (selfHook) {\r\n        callWithAsyncErrorHandling(selfHook.bind(instance.proxy), instance, type);\r\n    }\r\n}\r\nfunction applyMixins(instance, mixins, deferredData, deferredWatch, deferredProvide) {\r\n    for (let i = 0; i < mixins.length; i++) {\r\n        applyOptions(instance, mixins[i], deferredData, deferredWatch, deferredProvide, true);\r\n    }\r\n}\r\nfunction resolveData(instance, dataFn, publicThis) {\r\n    if ((process.env.NODE_ENV !== 'production') && !isFunction(dataFn)) {\r\n        warn(`The data option must be a function. ` +\r\n            `Plain object usage is no longer supported.`);\r\n    }\r\n    shouldCacheAccess = false;\r\n    const data = dataFn.call(publicThis, publicThis);\r\n    shouldCacheAccess = true;\r\n    if ((process.env.NODE_ENV !== 'production') && isPromise(data)) {\r\n        warn(`data() returned a Promise - note data() cannot be async; If you ` +\r\n            `intend to perform data fetching before component renders, use ` +\r\n            `async setup() + <Suspense>.`);\r\n    }\r\n    if (!isObject(data)) {\r\n        (process.env.NODE_ENV !== 'production') && warn(`data() should return an object.`);\r\n    }\r\n    else if (instance.data === EMPTY_OBJ) {\r\n        instance.data = reactive(data);\r\n    }\r\n    else {\r\n        // existing data: this is a mixin or extends.\r\n        extend(instance.data, data);\r\n    }\r\n}\r\nfunction createWatcher(raw, ctx, publicThis, key) {\r\n    const getter = key.includes('.')\r\n        ? createPathGetter(publicThis, key)\r\n        : () => publicThis[key];\r\n    if (isString(raw)) {\r\n        const handler = ctx[raw];\r\n        if (isFunction(handler)) {\r\n            watch(getter, handler);\r\n        }\r\n        else if ((process.env.NODE_ENV !== 'production')) {\r\n            warn(`Invalid watch handler specified by key \"${raw}\"`, handler);\r\n        }\r\n    }\r\n    else if (isFunction(raw)) {\r\n        watch(getter, raw.bind(publicThis));\r\n    }\r\n    else if (isObject(raw)) {\r\n        if (isArray(raw)) {\r\n            raw.forEach(r => createWatcher(r, ctx, publicThis, key));\r\n        }\r\n        else {\r\n            const handler = isFunction(raw.handler)\r\n                ? raw.handler.bind(publicThis)\r\n                : ctx[raw.handler];\r\n            if (isFunction(handler)) {\r\n                watch(getter, handler, raw);\r\n            }\r\n            else if ((process.env.NODE_ENV !== 'production')) {\r\n                warn(`Invalid watch handler specified by key \"${raw.handler}\"`, handler);\r\n            }\r\n        }\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production')) {\r\n        warn(`Invalid watch option: \"${key}\"`, raw);\r\n    }\r\n}\r\nfunction createPathGetter(ctx, path) {\r\n    const segments = path.split('.');\r\n    return () => {\r\n        let cur = ctx;\r\n        for (let i = 0; i < segments.length && cur; i++) {\r\n            cur = cur[segments[i]];\r\n        }\r\n        return cur;\r\n    };\r\n}\r\nfunction resolveMergedOptions(instance) {\r\n    const raw = instance.type;\r\n    const { __merged, mixins, extends: extendsOptions } = raw;\r\n    if (__merged)\r\n        return __merged;\r\n    const globalMixins = instance.appContext.mixins;\r\n    if (!globalMixins.length && !mixins && !extendsOptions)\r\n        return raw;\r\n    const options = {};\r\n    globalMixins.forEach(m => mergeOptions(options, m, instance));\r\n    mergeOptions(options, raw, instance);\r\n    return (raw.__merged = options);\r\n}\r\nfunction mergeOptions(to, from, instance) {\r\n    const strats = instance.appContext.config.optionMergeStrategies;\r\n    const { mixins, extends: extendsOptions } = from;\r\n    extendsOptions && mergeOptions(to, extendsOptions, instance);\r\n    mixins &&\r\n        mixins.forEach((m) => mergeOptions(to, m, instance));\r\n    for (const key in from) {\r\n        if (strats && hasOwn(strats, key)) {\r\n            to[key] = strats[key](to[key], from[key], instance.proxy, key);\r\n        }\r\n        else {\r\n            to[key] = from[key];\r\n        }\r\n    }\r\n}\n\n/**\r\n * #2437 In Vue 3, functional components do not have a public instance proxy but\r\n * they exist in the internal parent chain. For code that relies on traversing\r\n * public $parent chains, skip functional ones and go to the parent instead.\r\n */\r\nconst getPublicInstance = (i) => {\r\n    if (!i)\r\n        return null;\r\n    if (isStatefulComponent(i))\r\n        return i.exposed ? i.exposed : i.proxy;\r\n    return getPublicInstance(i.parent);\r\n};\r\nconst publicPropertiesMap = extend(Object.create(null), {\r\n    $: i => i,\r\n    $el: i => i.vnode.el,\r\n    $data: i => i.data,\r\n    $props: i => ((process.env.NODE_ENV !== 'production') ? shallowReadonly(i.props) : i.props),\r\n    $attrs: i => ((process.env.NODE_ENV !== 'production') ? shallowReadonly(i.attrs) : i.attrs),\r\n    $slots: i => ((process.env.NODE_ENV !== 'production') ? shallowReadonly(i.slots) : i.slots),\r\n    $refs: i => ((process.env.NODE_ENV !== 'production') ? shallowReadonly(i.refs) : i.refs),\r\n    $parent: i => getPublicInstance(i.parent),\r\n    $root: i => getPublicInstance(i.root),\r\n    $emit: i => i.emit,\r\n    $options: i => (__VUE_OPTIONS_API__ ? resolveMergedOptions(i) : i.type),\r\n    $forceUpdate: i => () => queueJob(i.update),\r\n    $nextTick: i => nextTick.bind(i.proxy),\r\n    $watch: i => (__VUE_OPTIONS_API__ ? instanceWatch.bind(i) : NOOP)\r\n});\r\nconst PublicInstanceProxyHandlers = {\r\n    get({ _: instance }, key) {\r\n        const { ctx, setupState, data, props, accessCache, type, appContext } = instance;\r\n        // let @vue/reactivity know it should never observe Vue public instances.\r\n        if (key === \"__v_skip\" /* SKIP */) {\r\n            return true;\r\n        }\r\n        // for internal formatters to know that this is a Vue instance\r\n        if ((process.env.NODE_ENV !== 'production') && key === '__isVue') {\r\n            return true;\r\n        }\r\n        // data / props / ctx\r\n        // This getter gets called for every property access on the render context\r\n        // during render and is a major hotspot. The most expensive part of this\r\n        // is the multiple hasOwn() calls. It's much faster to do a simple property\r\n        // access on a plain object, so we use an accessCache object (with null\r\n        // prototype) to memoize what access type a key corresponds to.\r\n        let normalizedProps;\r\n        if (key[0] !== '$') {\r\n            const n = accessCache[key];\r\n            if (n !== undefined) {\r\n                switch (n) {\r\n                    case 0 /* SETUP */:\r\n                        return setupState[key];\r\n                    case 1 /* DATA */:\r\n                        return data[key];\r\n                    case 3 /* CONTEXT */:\r\n                        return ctx[key];\r\n                    case 2 /* PROPS */:\r\n                        return props[key];\r\n                    // default: just fallthrough\r\n                }\r\n            }\r\n            else if (setupState !== EMPTY_OBJ && hasOwn(setupState, key)) {\r\n                accessCache[key] = 0 /* SETUP */;\r\n                return setupState[key];\r\n            }\r\n            else if (data !== EMPTY_OBJ && hasOwn(data, key)) {\r\n                accessCache[key] = 1 /* DATA */;\r\n                return data[key];\r\n            }\r\n            else if (\r\n            // only cache other properties when instance has declared (thus stable)\r\n            // props\r\n            (normalizedProps = instance.propsOptions[0]) &&\r\n                hasOwn(normalizedProps, key)) {\r\n                accessCache[key] = 2 /* PROPS */;\r\n                return props[key];\r\n            }\r\n            else if (ctx !== EMPTY_OBJ && hasOwn(ctx, key)) {\r\n                accessCache[key] = 3 /* CONTEXT */;\r\n                return ctx[key];\r\n            }\r\n            else if (!__VUE_OPTIONS_API__ || shouldCacheAccess) {\r\n                accessCache[key] = 4 /* OTHER */;\r\n            }\r\n        }\r\n        const publicGetter = publicPropertiesMap[key];\r\n        let cssModule, globalProperties;\r\n        // public $xxx properties\r\n        if (publicGetter) {\r\n            if (key === '$attrs') {\r\n                track(instance, \"get\" /* GET */, key);\r\n                (process.env.NODE_ENV !== 'production') && markAttrsAccessed();\r\n            }\r\n            return publicGetter(instance);\r\n        }\r\n        else if (\r\n        // css module (injected by vue-loader)\r\n        (cssModule = type.__cssModules) &&\r\n            (cssModule = cssModule[key])) {\r\n            return cssModule;\r\n        }\r\n        else if (ctx !== EMPTY_OBJ && hasOwn(ctx, key)) {\r\n            // user may set custom properties to `this` that start with `$`\r\n            accessCache[key] = 3 /* CONTEXT */;\r\n            return ctx[key];\r\n        }\r\n        else if (\r\n        // global properties\r\n        ((globalProperties = appContext.config.globalProperties),\r\n            hasOwn(globalProperties, key))) {\r\n            return globalProperties[key];\r\n        }\r\n        else if ((process.env.NODE_ENV !== 'production') &&\r\n            currentRenderingInstance &&\r\n            (!isString(key) ||\r\n                // #1091 avoid internal isRef/isVNode checks on component instance leading\r\n                // to infinite warning loop\r\n                key.indexOf('__v') !== 0)) {\r\n            if (data !== EMPTY_OBJ &&\r\n                (key[0] === '$' || key[0] === '_') &&\r\n                hasOwn(data, key)) {\r\n                warn(`Property ${JSON.stringify(key)} must be accessed via $data because it starts with a reserved ` +\r\n                    `character (\"$\" or \"_\") and is not proxied on the render context.`);\r\n            }\r\n            else if (instance === currentRenderingInstance) {\r\n                warn(`Property ${JSON.stringify(key)} was accessed during render ` +\r\n                    `but is not defined on instance.`);\r\n            }\r\n        }\r\n    },\r\n    set({ _: instance }, key, value) {\r\n        const { data, setupState, ctx } = instance;\r\n        if (setupState !== EMPTY_OBJ && hasOwn(setupState, key)) {\r\n            setupState[key] = value;\r\n        }\r\n        else if (data !== EMPTY_OBJ && hasOwn(data, key)) {\r\n            data[key] = value;\r\n        }\r\n        else if (hasOwn(instance.props, key)) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(`Attempting to mutate prop \"${key}\". Props are readonly.`, instance);\r\n            return false;\r\n        }\r\n        if (key[0] === '$' && key.slice(1) in instance) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(`Attempting to mutate public property \"${key}\". ` +\r\n                    `Properties starting with $ are reserved and readonly.`, instance);\r\n            return false;\r\n        }\r\n        else {\r\n            if ((process.env.NODE_ENV !== 'production') && key in instance.appContext.config.globalProperties) {\r\n                Object.defineProperty(ctx, key, {\r\n                    enumerable: true,\r\n                    configurable: true,\r\n                    value\r\n                });\r\n            }\r\n            else {\r\n                ctx[key] = value;\r\n            }\r\n        }\r\n        return true;\r\n    },\r\n    has({ _: { data, setupState, accessCache, ctx, appContext, propsOptions } }, key) {\r\n        let normalizedProps;\r\n        return (accessCache[key] !== undefined ||\r\n            (data !== EMPTY_OBJ && hasOwn(data, key)) ||\r\n            (setupState !== EMPTY_OBJ && hasOwn(setupState, key)) ||\r\n            ((normalizedProps = propsOptions[0]) && hasOwn(normalizedProps, key)) ||\r\n            hasOwn(ctx, key) ||\r\n            hasOwn(publicPropertiesMap, key) ||\r\n            hasOwn(appContext.config.globalProperties, key));\r\n    }\r\n};\r\nif ((process.env.NODE_ENV !== 'production') && !false) {\r\n    PublicInstanceProxyHandlers.ownKeys = (target) => {\r\n        warn(`Avoid app logic that relies on enumerating keys on a component instance. ` +\r\n            `The keys will be empty in production mode to avoid performance overhead.`);\r\n        return Reflect.ownKeys(target);\r\n    };\r\n}\r\nconst RuntimeCompiledPublicInstanceProxyHandlers = extend({}, PublicInstanceProxyHandlers, {\r\n    get(target, key) {\r\n        // fast path for unscopables when using `with` block\r\n        if (key === Symbol.unscopables) {\r\n            return;\r\n        }\r\n        return PublicInstanceProxyHandlers.get(target, key, target);\r\n    },\r\n    has(_, key) {\r\n        const has = key[0] !== '_' && !isGloballyWhitelisted(key);\r\n        if ((process.env.NODE_ENV !== 'production') && !has && PublicInstanceProxyHandlers.has(_, key)) {\r\n            warn(`Property ${JSON.stringify(key)} should not start with _ which is a reserved prefix for Vue internals.`);\r\n        }\r\n        return has;\r\n    }\r\n});\r\n// In dev mode, the proxy target exposes the same properties as seen on `this`\r\n// for easier console inspection. In prod mode it will be an empty object so\r\n// these properties definitions can be skipped.\r\nfunction createRenderContext(instance) {\r\n    const target = {};\r\n    // expose internal instance for proxy handlers\r\n    Object.defineProperty(target, `_`, {\r\n        configurable: true,\r\n        enumerable: false,\r\n        get: () => instance\r\n    });\r\n    // expose public properties\r\n    Object.keys(publicPropertiesMap).forEach(key => {\r\n        Object.defineProperty(target, key, {\r\n            configurable: true,\r\n            enumerable: false,\r\n            get: () => publicPropertiesMap[key](instance),\r\n            // intercepted by the proxy so no need for implementation,\r\n            // but needed to prevent set errors\r\n            set: NOOP\r\n        });\r\n    });\r\n    // expose global properties\r\n    const { globalProperties } = instance.appContext.config;\r\n    Object.keys(globalProperties).forEach(key => {\r\n        Object.defineProperty(target, key, {\r\n            configurable: true,\r\n            enumerable: false,\r\n            get: () => globalProperties[key],\r\n            set: NOOP\r\n        });\r\n    });\r\n    return target;\r\n}\r\n// dev only\r\nfunction exposePropsOnRenderContext(instance) {\r\n    const { ctx, propsOptions: [propsOptions] } = instance;\r\n    if (propsOptions) {\r\n        Object.keys(propsOptions).forEach(key => {\r\n            Object.defineProperty(ctx, key, {\r\n                enumerable: true,\r\n                configurable: true,\r\n                get: () => instance.props[key],\r\n                set: NOOP\r\n            });\r\n        });\r\n    }\r\n}\r\n// dev only\r\nfunction exposeSetupStateOnRenderContext(instance) {\r\n    const { ctx, setupState } = instance;\r\n    Object.keys(toRaw(setupState)).forEach(key => {\r\n        if (key[0] === '$' || key[0] === '_') {\r\n            warn(`setup() return property ${JSON.stringify(key)} should not start with \"$\" or \"_\" ` +\r\n                `which are reserved prefixes for Vue internals.`);\r\n            return;\r\n        }\r\n        Object.defineProperty(ctx, key, {\r\n            enumerable: true,\r\n            configurable: true,\r\n            get: () => setupState[key],\r\n            set: NOOP\r\n        });\r\n    });\r\n}\n\nconst emptyAppContext = createAppContext();\r\nlet uid$1 = 0;\r\nfunction createComponentInstance(vnode, parent, suspense) {\r\n    const type = vnode.type;\r\n    // inherit parent app context - or - if root, adopt from root vnode\r\n    const appContext = (parent ? parent.appContext : vnode.appContext) || emptyAppContext;\r\n    const instance = {\r\n        uid: uid$1++,\r\n        vnode,\r\n        type,\r\n        parent,\r\n        appContext,\r\n        root: null,\r\n        next: null,\r\n        subTree: null,\r\n        update: null,\r\n        render: null,\r\n        proxy: null,\r\n        exposed: null,\r\n        withProxy: null,\r\n        effects: null,\r\n        provides: parent ? parent.provides : Object.create(appContext.provides),\r\n        accessCache: null,\r\n        renderCache: [],\r\n        // local resovled assets\r\n        components: null,\r\n        directives: null,\r\n        // resolved props and emits options\r\n        propsOptions: normalizePropsOptions(type, appContext),\r\n        emitsOptions: normalizeEmitsOptions(type, appContext),\r\n        // emit\r\n        emit: null,\r\n        emitted: null,\r\n        // props default value\r\n        propsDefaults: EMPTY_OBJ,\r\n        // state\r\n        ctx: EMPTY_OBJ,\r\n        data: EMPTY_OBJ,\r\n        props: EMPTY_OBJ,\r\n        attrs: EMPTY_OBJ,\r\n        slots: EMPTY_OBJ,\r\n        refs: EMPTY_OBJ,\r\n        setupState: EMPTY_OBJ,\r\n        setupContext: null,\r\n        // suspense related\r\n        suspense,\r\n        suspenseId: suspense ? suspense.pendingId : 0,\r\n        asyncDep: null,\r\n        asyncResolved: false,\r\n        // lifecycle hooks\r\n        // not using enums here because it results in computed properties\r\n        isMounted: false,\r\n        isUnmounted: false,\r\n        isDeactivated: false,\r\n        bc: null,\r\n        c: null,\r\n        bm: null,\r\n        m: null,\r\n        bu: null,\r\n        u: null,\r\n        um: null,\r\n        bum: null,\r\n        da: null,\r\n        a: null,\r\n        rtg: null,\r\n        rtc: null,\r\n        ec: null\r\n    };\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        instance.ctx = createRenderContext(instance);\r\n    }\r\n    else {\r\n        instance.ctx = { _: instance };\r\n    }\r\n    instance.root = parent ? parent.root : instance;\r\n    instance.emit = emit.bind(null, instance);\r\n    return instance;\r\n}\r\nlet currentInstance = null;\r\nconst getCurrentInstance = () => currentInstance || currentRenderingInstance;\r\nconst setCurrentInstance = (instance) => {\r\n    currentInstance = instance;\r\n};\r\nconst isBuiltInTag = /*#__PURE__*/ makeMap('slot,component');\r\nfunction validateComponentName(name, config) {\r\n    const appIsNativeTag = config.isNativeTag || NO;\r\n    if (isBuiltInTag(name) || appIsNativeTag(name)) {\r\n        warn('Do not use built-in or reserved HTML elements as component id: ' + name);\r\n    }\r\n}\r\nfunction isStatefulComponent(instance) {\r\n    return instance.vnode.shapeFlag & 4 /* STATEFUL_COMPONENT */;\r\n}\r\nlet isInSSRComponentSetup = false;\r\nfunction setupComponent(instance, isSSR = false) {\r\n    isInSSRComponentSetup = isSSR;\r\n    const { props, children } = instance.vnode;\r\n    const isStateful = isStatefulComponent(instance);\r\n    initProps(instance, props, isStateful, isSSR);\r\n    initSlots(instance, children);\r\n    const setupResult = isStateful\r\n        ? setupStatefulComponent(instance, isSSR)\r\n        : undefined;\r\n    isInSSRComponentSetup = false;\r\n    return setupResult;\r\n}\r\nfunction setupStatefulComponent(instance, isSSR) {\r\n    const Component = instance.type;\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        if (Component.name) {\r\n            validateComponentName(Component.name, instance.appContext.config);\r\n        }\r\n        if (Component.components) {\r\n            const names = Object.keys(Component.components);\r\n            for (let i = 0; i < names.length; i++) {\r\n                validateComponentName(names[i], instance.appContext.config);\r\n            }\r\n        }\r\n        if (Component.directives) {\r\n            const names = Object.keys(Component.directives);\r\n            for (let i = 0; i < names.length; i++) {\r\n                validateDirectiveName(names[i]);\r\n            }\r\n        }\r\n    }\r\n    // 0. create render proxy property access cache\r\n    instance.accessCache = Object.create(null);\r\n    // 1. create public instance / render proxy\r\n    // also mark it raw so it's never observed\r\n    instance.proxy = new Proxy(instance.ctx, PublicInstanceProxyHandlers);\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        exposePropsOnRenderContext(instance);\r\n    }\r\n    // 2. call setup()\r\n    const { setup } = Component;\r\n    if (setup) {\r\n        const setupContext = (instance.setupContext =\r\n            setup.length > 1 ? createSetupContext(instance) : null);\r\n        currentInstance = instance;\r\n        pauseTracking();\r\n        const setupResult = callWithErrorHandling(setup, instance, 0 /* SETUP_FUNCTION */, [(process.env.NODE_ENV !== 'production') ? shallowReadonly(instance.props) : instance.props, setupContext]);\r\n        resetTracking();\r\n        currentInstance = null;\r\n        if (isPromise(setupResult)) {\r\n            if (isSSR) {\r\n                // return the promise so server-renderer can wait on it\r\n                return setupResult\r\n                    .then((resolvedResult) => {\r\n                    handleSetupResult(instance, resolvedResult, isSSR);\r\n                })\r\n                    .catch(e => {\r\n                    handleError(e, instance, 0 /* SETUP_FUNCTION */);\r\n                });\r\n            }\r\n            else {\r\n                // async setup returned Promise.\r\n                // bail here and wait for re-entry.\r\n                instance.asyncDep = setupResult;\r\n            }\r\n        }\r\n        else {\r\n            handleSetupResult(instance, setupResult, isSSR);\r\n        }\r\n    }\r\n    else {\r\n        finishComponentSetup(instance, isSSR);\r\n    }\r\n}\r\nfunction handleSetupResult(instance, setupResult, isSSR) {\r\n    if (isFunction(setupResult)) {\r\n        // setup returned an inline render function\r\n        {\r\n            instance.render = setupResult;\r\n        }\r\n    }\r\n    else if (isObject(setupResult)) {\r\n        if ((process.env.NODE_ENV !== 'production') && isVNode(setupResult)) {\r\n            warn(`setup() should not return VNodes directly - ` +\r\n                `return a render function instead.`);\r\n        }\r\n        // setup returned bindings.\r\n        // assuming a render function compiled from template is present.\r\n        if ((process.env.NODE_ENV !== 'production') || __VUE_PROD_DEVTOOLS__) {\r\n            instance.devtoolsRawSetupState = setupResult;\r\n        }\r\n        instance.setupState = proxyRefs(setupResult);\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            exposeSetupStateOnRenderContext(instance);\r\n        }\r\n    }\r\n    else if ((process.env.NODE_ENV !== 'production') && setupResult !== undefined) {\r\n        warn(`setup() should return an object. Received: ${setupResult === null ? 'null' : typeof setupResult}`);\r\n    }\r\n    finishComponentSetup(instance, isSSR);\r\n}\r\nlet compile;\r\n// dev only\r\nconst isRuntimeOnly = () => !compile;\r\n/**\r\n * For runtime-dom to register the compiler.\r\n * Note the exported method uses any to avoid d.ts relying on the compiler types.\r\n */\r\nfunction registerRuntimeCompiler(_compile) {\r\n    compile = _compile;\r\n}\r\nfunction finishComponentSetup(instance, isSSR) {\r\n    const Component = instance.type;\r\n    // template / render function normalization\r\n    if (!instance.render) {\r\n        // could be set from setup()\r\n        if (compile && Component.template && !Component.render) {\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                startMeasure(instance, `compile`);\r\n            }\r\n            Component.render = compile(Component.template, {\r\n                isCustomElement: instance.appContext.config.isCustomElement,\r\n                delimiters: Component.delimiters\r\n            });\r\n            if ((process.env.NODE_ENV !== 'production')) {\r\n                endMeasure(instance, `compile`);\r\n            }\r\n        }\r\n        instance.render = (Component.render || NOOP);\r\n        // for runtime-compiled render functions using `with` blocks, the render\r\n        // proxy used needs a different `has` handler which is more performant and\r\n        // also only allows a whitelist of globals to fallthrough.\r\n        if (instance.render._rc) {\r\n            instance.withProxy = new Proxy(instance.ctx, RuntimeCompiledPublicInstanceProxyHandlers);\r\n        }\r\n    }\r\n    // support for 2.x options\r\n    if (__VUE_OPTIONS_API__) {\r\n        currentInstance = instance;\r\n        pauseTracking();\r\n        applyOptions(instance, Component);\r\n        resetTracking();\r\n        currentInstance = null;\r\n    }\r\n    // warn missing template/render\r\n    // the runtime compilation of template in SSR is done by server-render\r\n    if ((process.env.NODE_ENV !== 'production') && !Component.render && instance.render === NOOP && !isSSR) {\r\n        /* istanbul ignore if */\r\n        if (!compile && Component.template) {\r\n            warn(`Component provided template option but ` +\r\n                `runtime compilation is not supported in this build of Vue.` +\r\n                (` Configure your bundler to alias \"vue\" to \"vue/dist/vue.esm-bundler.js\".`\r\n                    ) /* should not happen */);\r\n        }\r\n        else {\r\n            warn(`Component is missing template or render function.`);\r\n        }\r\n    }\r\n}\r\nconst attrHandlers = {\r\n    get: (target, key) => {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            markAttrsAccessed();\r\n        }\r\n        return target[key];\r\n    },\r\n    set: () => {\r\n        warn(`setupContext.attrs is readonly.`);\r\n        return false;\r\n    },\r\n    deleteProperty: () => {\r\n        warn(`setupContext.attrs is readonly.`);\r\n        return false;\r\n    }\r\n};\r\nfunction createSetupContext(instance) {\r\n    const expose = exposed => {\r\n        if ((process.env.NODE_ENV !== 'production') && instance.exposed) {\r\n            warn(`expose() should be called only once per setup().`);\r\n        }\r\n        instance.exposed = proxyRefs(exposed);\r\n    };\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        // We use getters in dev in case libs like test-utils overwrite instance\r\n        // properties (overwrites should not be done in prod)\r\n        return Object.freeze({\r\n            get attrs() {\r\n                return new Proxy(instance.attrs, attrHandlers);\r\n            },\r\n            get slots() {\r\n                return shallowReadonly(instance.slots);\r\n            },\r\n            get emit() {\r\n                return (event, ...args) => instance.emit(event, ...args);\r\n            },\r\n            expose\r\n        });\r\n    }\r\n    else {\r\n        return {\r\n            attrs: instance.attrs,\r\n            slots: instance.slots,\r\n            emit: instance.emit,\r\n            expose\r\n        };\r\n    }\r\n}\r\n// record effects created during a component's setup() so that they can be\r\n// stopped when the component unmounts\r\nfunction recordInstanceBoundEffect(effect, instance = currentInstance) {\r\n    if (instance) {\r\n        (instance.effects || (instance.effects = [])).push(effect);\r\n    }\r\n}\r\nconst classifyRE = /(?:^|[-_])(\\w)/g;\r\nconst classify = (str) => str.replace(classifyRE, c => c.toUpperCase()).replace(/[-_]/g, '');\r\nfunction getComponentName(Component) {\r\n    return isFunction(Component)\r\n        ? Component.displayName || Component.name\r\n        : Component.name;\r\n}\r\n/* istanbul ignore next */\r\nfunction formatComponentName(instance, Component, isRoot = false) {\r\n    let name = getComponentName(Component);\r\n    if (!name && Component.__file) {\r\n        const match = Component.__file.match(/([^/\\\\]+)\\.\\w+$/);\r\n        if (match) {\r\n            name = match[1];\r\n        }\r\n    }\r\n    if (!name && instance && instance.parent) {\r\n        // try to infer the name based on reverse resolution\r\n        const inferFromRegistry = (registry) => {\r\n            for (const key in registry) {\r\n                if (registry[key] === Component) {\r\n                    return key;\r\n                }\r\n            }\r\n        };\r\n        name =\r\n            inferFromRegistry(instance.components ||\r\n                instance.parent.type.components) || inferFromRegistry(instance.appContext.components);\r\n    }\r\n    return name ? classify(name) : isRoot ? `App` : `Anonymous`;\r\n}\r\nfunction isClassComponent(value) {\r\n    return isFunction(value) && '__vccOpts' in value;\r\n}\n\nfunction computed(getterOrOptions) {\r\n    const c = computed$1(getterOrOptions);\r\n    recordInstanceBoundEffect(c.effect);\r\n    return c;\r\n}\n\n// implementation\r\nfunction defineProps() {\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        warn(`defineProps() is a compiler-hint helper that is only usable inside ` +\r\n            `<script setup> of a single file component. Its arguments should be ` +\r\n            `compiled away and passing it at runtime has no effect.`);\r\n    }\r\n    return null;\r\n}\r\n// implementation\r\nfunction defineEmit() {\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        warn(`defineEmit() is a compiler-hint helper that is only usable inside ` +\r\n            `<script setup> of a single file component. Its arguments should be ` +\r\n            `compiled away and passing it at runtime has no effect.`);\r\n    }\r\n    return null;\r\n}\r\nfunction useContext() {\r\n    const i = getCurrentInstance();\r\n    if ((process.env.NODE_ENV !== 'production') && !i) {\r\n        warn(`useContext() called without active instance.`);\r\n    }\r\n    return i.setupContext || (i.setupContext = createSetupContext(i));\r\n}\n\n// Actual implementation\r\nfunction h(type, propsOrChildren, children) {\r\n    const l = arguments.length;\r\n    if (l === 2) {\r\n        if (isObject(propsOrChildren) && !isArray(propsOrChildren)) {\r\n            // single vnode without props\r\n            if (isVNode(propsOrChildren)) {\r\n                return createVNode(type, null, [propsOrChildren]);\r\n            }\r\n            // props without children\r\n            return createVNode(type, propsOrChildren);\r\n        }\r\n        else {\r\n            // omit props\r\n            return createVNode(type, null, propsOrChildren);\r\n        }\r\n    }\r\n    else {\r\n        if (l > 3) {\r\n            children = Array.prototype.slice.call(arguments, 2);\r\n        }\r\n        else if (l === 3 && isVNode(children)) {\r\n            children = [children];\r\n        }\r\n        return createVNode(type, propsOrChildren, children);\r\n    }\r\n}\n\nconst ssrContextKey = Symbol((process.env.NODE_ENV !== 'production') ? `ssrContext` : ``);\r\nconst useSSRContext = () => {\r\n    {\r\n        const ctx = inject(ssrContextKey);\r\n        if (!ctx) {\r\n            warn(`Server rendering context not provided. Make sure to only call ` +\r\n                `useSSRContext() conditionally in the server build.`);\r\n        }\r\n        return ctx;\r\n    }\r\n};\n\nfunction initCustomFormatter() {\r\n    /* eslint-disable no-restricted-globals */\r\n    if (!(process.env.NODE_ENV !== 'production') || typeof window === 'undefined') {\r\n        return;\r\n    }\r\n    const vueStyle = { style: 'color:#3ba776' };\r\n    const numberStyle = { style: 'color:#0b1bc9' };\r\n    const stringStyle = { style: 'color:#b62e24' };\r\n    const keywordStyle = { style: 'color:#9d288c' };\r\n    // custom formatter for Chrome\r\n    // https://www.mattzeunert.com/2016/02/19/custom-chrome-devtools-object-formatters.html\r\n    const formatter = {\r\n        header(obj) {\r\n            // TODO also format ComponentPublicInstance & ctx.slots/attrs in setup\r\n            if (!isObject(obj)) {\r\n                return null;\r\n            }\r\n            if (obj.__isVue) {\r\n                return ['div', vueStyle, `VueInstance`];\r\n            }\r\n            else if (isRef(obj)) {\r\n                return [\r\n                    'div',\r\n                    {},\r\n                    ['span', vueStyle, genRefFlag(obj)],\r\n                    '<',\r\n                    formatValue(obj.value),\r\n                    `>`\r\n                ];\r\n            }\r\n            else if (isReactive(obj)) {\r\n                return [\r\n                    'div',\r\n                    {},\r\n                    ['span', vueStyle, 'Reactive'],\r\n                    '<',\r\n                    formatValue(obj),\r\n                    `>${isReadonly(obj) ? ` (readonly)` : ``}`\r\n                ];\r\n            }\r\n            else if (isReadonly(obj)) {\r\n                return [\r\n                    'div',\r\n                    {},\r\n                    ['span', vueStyle, 'Readonly'],\r\n                    '<',\r\n                    formatValue(obj),\r\n                    '>'\r\n                ];\r\n            }\r\n            return null;\r\n        },\r\n        hasBody(obj) {\r\n            return obj && obj.__isVue;\r\n        },\r\n        body(obj) {\r\n            if (obj && obj.__isVue) {\r\n                return [\r\n                    'div',\r\n                    {},\r\n                    ...formatInstance(obj.$)\r\n                ];\r\n            }\r\n        }\r\n    };\r\n    function formatInstance(instance) {\r\n        const blocks = [];\r\n        if (instance.type.props && instance.props) {\r\n            blocks.push(createInstanceBlock('props', toRaw(instance.props)));\r\n        }\r\n        if (instance.setupState !== EMPTY_OBJ) {\r\n            blocks.push(createInstanceBlock('setup', instance.setupState));\r\n        }\r\n        if (instance.data !== EMPTY_OBJ) {\r\n            blocks.push(createInstanceBlock('data', toRaw(instance.data)));\r\n        }\r\n        const computed = extractKeys(instance, 'computed');\r\n        if (computed) {\r\n            blocks.push(createInstanceBlock('computed', computed));\r\n        }\r\n        const injected = extractKeys(instance, 'inject');\r\n        if (injected) {\r\n            blocks.push(createInstanceBlock('injected', injected));\r\n        }\r\n        blocks.push([\r\n            'div',\r\n            {},\r\n            [\r\n                'span',\r\n                {\r\n                    style: keywordStyle.style + ';opacity:0.66'\r\n                },\r\n                '$ (internal): '\r\n            ],\r\n            ['object', { object: instance }]\r\n        ]);\r\n        return blocks;\r\n    }\r\n    function createInstanceBlock(type, target) {\r\n        target = extend({}, target);\r\n        if (!Object.keys(target).length) {\r\n            return ['span', {}];\r\n        }\r\n        return [\r\n            'div',\r\n            { style: 'line-height:1.25em;margin-bottom:0.6em' },\r\n            [\r\n                'div',\r\n                {\r\n                    style: 'color:#476582'\r\n                },\r\n                type\r\n            ],\r\n            [\r\n                'div',\r\n                {\r\n                    style: 'padding-left:1.25em'\r\n                },\r\n                ...Object.keys(target).map(key => {\r\n                    return [\r\n                        'div',\r\n                        {},\r\n                        ['span', keywordStyle, key + ': '],\r\n                        formatValue(target[key], false)\r\n                    ];\r\n                })\r\n            ]\r\n        ];\r\n    }\r\n    function formatValue(v, asRaw = true) {\r\n        if (typeof v === 'number') {\r\n            return ['span', numberStyle, v];\r\n        }\r\n        else if (typeof v === 'string') {\r\n            return ['span', stringStyle, JSON.stringify(v)];\r\n        }\r\n        else if (typeof v === 'boolean') {\r\n            return ['span', keywordStyle, v];\r\n        }\r\n        else if (isObject(v)) {\r\n            return ['object', { object: asRaw ? toRaw(v) : v }];\r\n        }\r\n        else {\r\n            return ['span', stringStyle, String(v)];\r\n        }\r\n    }\r\n    function extractKeys(instance, type) {\r\n        const Comp = instance.type;\r\n        if (isFunction(Comp)) {\r\n            return;\r\n        }\r\n        const extracted = {};\r\n        for (const key in instance.ctx) {\r\n            if (isKeyOfType(Comp, key, type)) {\r\n                extracted[key] = instance.ctx[key];\r\n            }\r\n        }\r\n        return extracted;\r\n    }\r\n    function isKeyOfType(Comp, key, type) {\r\n        const opts = Comp[type];\r\n        if ((isArray(opts) && opts.includes(key)) ||\r\n            (isObject(opts) && key in opts)) {\r\n            return true;\r\n        }\r\n        if (Comp.extends && isKeyOfType(Comp.extends, key, type)) {\r\n            return true;\r\n        }\r\n        if (Comp.mixins && Comp.mixins.some(m => isKeyOfType(m, key, type))) {\r\n            return true;\r\n        }\r\n    }\r\n    function genRefFlag(v) {\r\n        if (v._shallow) {\r\n            return `ShallowRef`;\r\n        }\r\n        if (v.effect) {\r\n            return `ComputedRef`;\r\n        }\r\n        return `Ref`;\r\n    }\r\n    if (window.devtoolsFormatters) {\r\n        window.devtoolsFormatters.push(formatter);\r\n    }\r\n    else {\r\n        window.devtoolsFormatters = [formatter];\r\n    }\r\n}\n\n/**\r\n * Actual implementation\r\n */\r\nfunction renderList(source, renderItem) {\r\n    let ret;\r\n    if (isArray(source) || isString(source)) {\r\n        ret = new Array(source.length);\r\n        for (let i = 0, l = source.length; i < l; i++) {\r\n            ret[i] = renderItem(source[i], i);\r\n        }\r\n    }\r\n    else if (typeof source === 'number') {\r\n        if ((process.env.NODE_ENV !== 'production') && !Number.isInteger(source)) {\r\n            warn(`The v-for range expect an integer value but got ${source}.`);\r\n            return [];\r\n        }\r\n        ret = new Array(source);\r\n        for (let i = 0; i < source; i++) {\r\n            ret[i] = renderItem(i + 1, i);\r\n        }\r\n    }\r\n    else if (isObject(source)) {\r\n        if (source[Symbol.iterator]) {\r\n            ret = Array.from(source, renderItem);\r\n        }\r\n        else {\r\n            const keys = Object.keys(source);\r\n            ret = new Array(keys.length);\r\n            for (let i = 0, l = keys.length; i < l; i++) {\r\n                const key = keys[i];\r\n                ret[i] = renderItem(source[key], key, i);\r\n            }\r\n        }\r\n    }\r\n    else {\r\n        ret = [];\r\n    }\r\n    return ret;\r\n}\n\n/**\r\n * For prefixing keys in v-on=\"obj\" with \"on\"\r\n * @private\r\n */\r\nfunction toHandlers(obj) {\r\n    const ret = {};\r\n    if ((process.env.NODE_ENV !== 'production') && !isObject(obj)) {\r\n        warn(`v-on with no argument expects an object value.`);\r\n        return ret;\r\n    }\r\n    for (const key in obj) {\r\n        ret[toHandlerKey(key)] = obj[key];\r\n    }\r\n    return ret;\r\n}\n\n/**\r\n * Compiler runtime helper for creating dynamic slots object\r\n * @private\r\n */\r\nfunction createSlots(slots, dynamicSlots) {\r\n    for (let i = 0; i < dynamicSlots.length; i++) {\r\n        const slot = dynamicSlots[i];\r\n        // array of dynamic slot generated by <template v-for=\"...\" #[...]>\r\n        if (isArray(slot)) {\r\n            for (let j = 0; j < slot.length; j++) {\r\n                slots[slot[j].name] = slot[j].fn;\r\n            }\r\n        }\r\n        else if (slot) {\r\n            // conditional single slot generated by <template v-if=\"...\" #foo>\r\n            slots[slot.name] = slot.fn;\r\n        }\r\n    }\r\n    return slots;\r\n}\n\n// Core API ------------------------------------------------------------------\r\nconst version = \"3.0.11\";\r\n/**\r\n * SSR utils for \\@vue/server-renderer. Only exposed in cjs builds.\r\n * @internal\r\n */\r\nconst ssrUtils = (null);\n\nexport { BaseTransition, Comment, Fragment, KeepAlive, Static, Suspense, Teleport, Text, callWithAsyncErrorHandling, callWithErrorHandling, cloneVNode, computed, createBlock, createCommentVNode, createHydrationRenderer, createRenderer, createSlots, createStaticVNode, createTextVNode, createVNode, defineAsyncComponent, defineComponent, defineEmit, defineProps, devtools, getCurrentInstance, getTransitionRawChildren, h, handleError, initCustomFormatter, inject, isRuntimeOnly, isVNode, mergeProps, nextTick, onActivated, onBeforeMount, onBeforeUnmount, onBeforeUpdate, onDeactivated, onErrorCaptured, onMounted, onRenderTracked, onRenderTriggered, onUnmounted, onUpdated, openBlock, popScopeId, provide, pushScopeId, queuePostFlushCb, registerRuntimeCompiler, renderList, renderSlot, resolveComponent, resolveDirective, resolveDynamicComponent, resolveTransitionHooks, setBlockTracking, setDevtoolsHook, setTransitionHooks, ssrContextKey, ssrUtils, toHandlers, transformVNodeArgs, useContext, useSSRContext, useTransitionState, version, warn, watch, watchEffect, withCtx, withDirectives, withScopeId };\n","import { camelize, warn, callWithAsyncErrorHandling, getCurrentInstance, onMounted, watchEffect, onUpdated, Fragment, h, BaseTransition, useTransitionState, toRaw, getTransitionRawChildren, setTransitionHooks, resolveTransitionHooks, createVNode, createRenderer, isRuntimeOnly, createHydrationRenderer } from '@vue/runtime-core';\nexport * from '@vue/runtime-core';\nimport { isString, isArray, hyphenate, capitalize, isSpecialBooleanAttr, isOn, isModelListener, isFunction, EMPTY_OBJ, extend, isObject, toNumber, invokeArrayFns, looseIndexOf, isSet, looseEqual, isHTMLTag, isSVGTag } from '@vue/shared';\n\nconst svgNS = 'http://www.w3.org/2000/svg';\r\nconst doc = (typeof document !== 'undefined' ? document : null);\r\nlet tempContainer;\r\nlet tempSVGContainer;\r\nconst nodeOps = {\r\n    insert: (child, parent, anchor) => {\r\n        parent.insertBefore(child, anchor || null);\r\n    },\r\n    remove: child => {\r\n        const parent = child.parentNode;\r\n        if (parent) {\r\n            parent.removeChild(child);\r\n        }\r\n    },\r\n    createElement: (tag, isSVG, is, props) => {\r\n        const el = isSVG\r\n            ? doc.createElementNS(svgNS, tag)\r\n            : doc.createElement(tag, is ? { is } : undefined);\r\n        if (tag === 'select' && props && props.multiple != null) {\r\n            el.setAttribute('multiple', props.multiple);\r\n        }\r\n        return el;\r\n    },\r\n    createText: text => doc.createTextNode(text),\r\n    createComment: text => doc.createComment(text),\r\n    setText: (node, text) => {\r\n        node.nodeValue = text;\r\n    },\r\n    setElementText: (el, text) => {\r\n        el.textContent = text;\r\n    },\r\n    parentNode: node => node.parentNode,\r\n    nextSibling: node => node.nextSibling,\r\n    querySelector: selector => doc.querySelector(selector),\r\n    setScopeId(el, id) {\r\n        el.setAttribute(id, '');\r\n    },\r\n    cloneNode(el) {\r\n        const cloned = el.cloneNode(true);\r\n        // #3072\r\n        // - in `patchDOMProp`, we store the actual value in the `el._value` property.\r\n        // - normally, elements using `:value` bindings will not be hoisted, but if\r\n        //   the bound value is a constant, e.g. `:value=\"true\"` - they do get\r\n        //   hoisted.\r\n        // - in production, hoisted nodes are cloned when subsequent inserts, but\r\n        //   cloneNode() does not copy the custom property we attached.\r\n        // - This may need to account for other custom DOM properties we attach to\r\n        //   elements in addition to `_value` in the future.\r\n        if (`_value` in el) {\r\n            cloned._value = el._value;\r\n        }\r\n        return cloned;\r\n    },\r\n    // __UNSAFE__\r\n    // Reason: innerHTML.\r\n    // Static content here can only come from compiled templates.\r\n    // As long as the user only uses trusted templates, this is safe.\r\n    insertStaticContent(content, parent, anchor, isSVG) {\r\n        const temp = isSVG\r\n            ? tempSVGContainer ||\r\n                (tempSVGContainer = doc.createElementNS(svgNS, 'svg'))\r\n            : tempContainer || (tempContainer = doc.createElement('div'));\r\n        temp.innerHTML = content;\r\n        const first = temp.firstChild;\r\n        let node = first;\r\n        let last = node;\r\n        while (node) {\r\n            last = node;\r\n            nodeOps.insert(node, parent, anchor);\r\n            node = temp.firstChild;\r\n        }\r\n        return [first, last];\r\n    }\r\n};\n\n// compiler should normalize class + :class bindings on the same element\r\n// into a single binding ['staticClass', dynamic]\r\nfunction patchClass(el, value, isSVG) {\r\n    if (value == null) {\r\n        value = '';\r\n    }\r\n    if (isSVG) {\r\n        el.setAttribute('class', value);\r\n    }\r\n    else {\r\n        // directly setting className should be faster than setAttribute in theory\r\n        // if this is an element during a transition, take the temporary transition\r\n        // classes into account.\r\n        const transitionClasses = el._vtc;\r\n        if (transitionClasses) {\r\n            value = (value\r\n                ? [value, ...transitionClasses]\r\n                : [...transitionClasses]).join(' ');\r\n        }\r\n        el.className = value;\r\n    }\r\n}\n\nfunction patchStyle(el, prev, next) {\r\n    const style = el.style;\r\n    if (!next) {\r\n        el.removeAttribute('style');\r\n    }\r\n    else if (isString(next)) {\r\n        if (prev !== next) {\r\n            const current = style.display;\r\n            style.cssText = next;\r\n            // indicates that the `display` of the element is controlled by `v-show`,\r\n            // so we always keep the current `display` value regardless of the `style` value,\r\n            // thus handing over control to `v-show`.\r\n            if ('_vod' in el) {\r\n                style.display = current;\r\n            }\r\n        }\r\n    }\r\n    else {\r\n        for (const key in next) {\r\n            setStyle(style, key, next[key]);\r\n        }\r\n        if (prev && !isString(prev)) {\r\n            for (const key in prev) {\r\n                if (next[key] == null) {\r\n                    setStyle(style, key, '');\r\n                }\r\n            }\r\n        }\r\n    }\r\n}\r\nconst importantRE = /\\s*!important$/;\r\nfunction setStyle(style, name, val) {\r\n    if (isArray(val)) {\r\n        val.forEach(v => setStyle(style, name, v));\r\n    }\r\n    else {\r\n        if (name.startsWith('--')) {\r\n            // custom property definition\r\n            style.setProperty(name, val);\r\n        }\r\n        else {\r\n            const prefixed = autoPrefix(style, name);\r\n            if (importantRE.test(val)) {\r\n                // !important\r\n                style.setProperty(hyphenate(prefixed), val.replace(importantRE, ''), 'important');\r\n            }\r\n            else {\r\n                style[prefixed] = val;\r\n            }\r\n        }\r\n    }\r\n}\r\nconst prefixes = ['Webkit', 'Moz', 'ms'];\r\nconst prefixCache = {};\r\nfunction autoPrefix(style, rawName) {\r\n    const cached = prefixCache[rawName];\r\n    if (cached) {\r\n        return cached;\r\n    }\r\n    let name = camelize(rawName);\r\n    if (name !== 'filter' && name in style) {\r\n        return (prefixCache[rawName] = name);\r\n    }\r\n    name = capitalize(name);\r\n    for (let i = 0; i < prefixes.length; i++) {\r\n        const prefixed = prefixes[i] + name;\r\n        if (prefixed in style) {\r\n            return (prefixCache[rawName] = prefixed);\r\n        }\r\n    }\r\n    return rawName;\r\n}\n\nconst xlinkNS = 'http://www.w3.org/1999/xlink';\r\nfunction patchAttr(el, key, value, isSVG) {\r\n    if (isSVG && key.startsWith('xlink:')) {\r\n        if (value == null) {\r\n            el.removeAttributeNS(xlinkNS, key.slice(6, key.length));\r\n        }\r\n        else {\r\n            el.setAttributeNS(xlinkNS, key, value);\r\n        }\r\n    }\r\n    else {\r\n        // note we are only checking boolean attributes that don't have a\r\n        // corresponding dom prop of the same name here.\r\n        const isBoolean = isSpecialBooleanAttr(key);\r\n        if (value == null || (isBoolean && value === false)) {\r\n            el.removeAttribute(key);\r\n        }\r\n        else {\r\n            el.setAttribute(key, isBoolean ? '' : value);\r\n        }\r\n    }\r\n}\n\n// __UNSAFE__\r\n// functions. The user is responsible for using them with only trusted content.\r\nfunction patchDOMProp(el, key, value, \r\n// the following args are passed only due to potential innerHTML/textContent\r\n// overriding existing VNodes, in which case the old tree must be properly\r\n// unmounted.\r\nprevChildren, parentComponent, parentSuspense, unmountChildren) {\r\n    if (key === 'innerHTML' || key === 'textContent') {\r\n        if (prevChildren) {\r\n            unmountChildren(prevChildren, parentComponent, parentSuspense);\r\n        }\r\n        el[key] = value == null ? '' : value;\r\n        return;\r\n    }\r\n    if (key === 'value' && el.tagName !== 'PROGRESS') {\r\n        // store value as _value as well since\r\n        // non-string values will be stringified.\r\n        el._value = value;\r\n        const newValue = value == null ? '' : value;\r\n        if (el.value !== newValue) {\r\n            el.value = newValue;\r\n        }\r\n        return;\r\n    }\r\n    if (value === '' || value == null) {\r\n        const type = typeof el[key];\r\n        if (value === '' && type === 'boolean') {\r\n            // e.g. <select multiple> compiles to { multiple: '' }\r\n            el[key] = true;\r\n            return;\r\n        }\r\n        else if (value == null && type === 'string') {\r\n            // e.g. <div :id=\"null\">\r\n            el[key] = '';\r\n            el.removeAttribute(key);\r\n            return;\r\n        }\r\n        else if (type === 'number') {\r\n            // e.g. <img :width=\"null\">\r\n            el[key] = 0;\r\n            el.removeAttribute(key);\r\n            return;\r\n        }\r\n    }\r\n    // some properties perform value validation and throw\r\n    try {\r\n        el[key] = value;\r\n    }\r\n    catch (e) {\r\n        if ((process.env.NODE_ENV !== 'production')) {\r\n            warn(`Failed setting prop \"${key}\" on <${el.tagName.toLowerCase()}>: ` +\r\n                `value ${value} is invalid.`, e);\r\n        }\r\n    }\r\n}\n\n// Async edge case fix requires storing an event listener's attach timestamp.\r\nlet _getNow = Date.now;\r\nlet skipTimestampCheck = false;\r\nif (typeof window !== 'undefined') {\r\n    // Determine what event timestamp the browser is using. Annoyingly, the\r\n    // timestamp can either be hi-res (relative to page load) or low-res\r\n    // (relative to UNIX epoch), so in order to compare time we have to use the\r\n    // same timestamp type when saving the flush timestamp.\r\n    if (_getNow() > document.createEvent('Event').timeStamp) {\r\n        // if the low-res timestamp which is bigger than the event timestamp\r\n        // (which is evaluated AFTER) it means the event is using a hi-res timestamp,\r\n        // and we need to use the hi-res version for event listeners as well.\r\n        _getNow = () => performance.now();\r\n    }\r\n    // #3485: Firefox <= 53 has incorrect Event.timeStamp implementation\r\n    // and does not fire microtasks in between event propagation, so safe to exclude.\r\n    const ffMatch = navigator.userAgent.match(/firefox\\/(\\d+)/i);\r\n    skipTimestampCheck = !!(ffMatch && Number(ffMatch[1]) <= 53);\r\n}\r\n// To avoid the overhead of repeatedly calling performance.now(), we cache\r\n// and use the same timestamp for all event listeners attached in the same tick.\r\nlet cachedNow = 0;\r\nconst p = Promise.resolve();\r\nconst reset = () => {\r\n    cachedNow = 0;\r\n};\r\nconst getNow = () => cachedNow || (p.then(reset), (cachedNow = _getNow()));\r\nfunction addEventListener(el, event, handler, options) {\r\n    el.addEventListener(event, handler, options);\r\n}\r\nfunction removeEventListener(el, event, handler, options) {\r\n    el.removeEventListener(event, handler, options);\r\n}\r\nfunction patchEvent(el, rawName, prevValue, nextValue, instance = null) {\r\n    // vei = vue event invokers\r\n    const invokers = el._vei || (el._vei = {});\r\n    const existingInvoker = invokers[rawName];\r\n    if (nextValue && existingInvoker) {\r\n        // patch\r\n        existingInvoker.value = nextValue;\r\n    }\r\n    else {\r\n        const [name, options] = parseName(rawName);\r\n        if (nextValue) {\r\n            // add\r\n            const invoker = (invokers[rawName] = createInvoker(nextValue, instance));\r\n            addEventListener(el, name, invoker, options);\r\n        }\r\n        else if (existingInvoker) {\r\n            // remove\r\n            removeEventListener(el, name, existingInvoker, options);\r\n            invokers[rawName] = undefined;\r\n        }\r\n    }\r\n}\r\nconst optionsModifierRE = /(?:Once|Passive|Capture)$/;\r\nfunction parseName(name) {\r\n    let options;\r\n    if (optionsModifierRE.test(name)) {\r\n        options = {};\r\n        let m;\r\n        while ((m = name.match(optionsModifierRE))) {\r\n            name = name.slice(0, name.length - m[0].length);\r\n            options[m[0].toLowerCase()] = true;\r\n        }\r\n    }\r\n    return [hyphenate(name.slice(2)), options];\r\n}\r\nfunction createInvoker(initialValue, instance) {\r\n    const invoker = (e) => {\r\n        // async edge case #6566: inner click event triggers patch, event handler\r\n        // attached to outer element during patch, and triggered again. This\r\n        // happens because browsers fire microtask ticks between event propagation.\r\n        // the solution is simple: we save the timestamp when a handler is attached,\r\n        // and the handler would only fire if the event passed to it was fired\r\n        // AFTER it was attached.\r\n        const timeStamp = e.timeStamp || _getNow();\r\n        if (skipTimestampCheck || timeStamp >= invoker.attached - 1) {\r\n            callWithAsyncErrorHandling(patchStopImmediatePropagation(e, invoker.value), instance, 5 /* NATIVE_EVENT_HANDLER */, [e]);\r\n        }\r\n    };\r\n    invoker.value = initialValue;\r\n    invoker.attached = getNow();\r\n    return invoker;\r\n}\r\nfunction patchStopImmediatePropagation(e, value) {\r\n    if (isArray(value)) {\r\n        const originalStop = e.stopImmediatePropagation;\r\n        e.stopImmediatePropagation = () => {\r\n            originalStop.call(e);\r\n            e._stopped = true;\r\n        };\r\n        return value.map(fn => (e) => !e._stopped && fn(e));\r\n    }\r\n    else {\r\n        return value;\r\n    }\r\n}\n\nconst nativeOnRE = /^on[a-z]/;\r\nconst forcePatchProp = (_, key) => key === 'value';\r\nconst patchProp = (el, key, prevValue, nextValue, isSVG = false, prevChildren, parentComponent, parentSuspense, unmountChildren) => {\r\n    switch (key) {\r\n        // special\r\n        case 'class':\r\n            patchClass(el, nextValue, isSVG);\r\n            break;\r\n        case 'style':\r\n            patchStyle(el, prevValue, nextValue);\r\n            break;\r\n        default:\r\n            if (isOn(key)) {\r\n                // ignore v-model listeners\r\n                if (!isModelListener(key)) {\r\n                    patchEvent(el, key, prevValue, nextValue, parentComponent);\r\n                }\r\n            }\r\n            else if (shouldSetAsProp(el, key, nextValue, isSVG)) {\r\n                patchDOMProp(el, key, nextValue, prevChildren, parentComponent, parentSuspense, unmountChildren);\r\n            }\r\n            else {\r\n                // special case for <input v-model type=\"checkbox\"> with\r\n                // :true-value & :false-value\r\n                // store value as dom properties since non-string values will be\r\n                // stringified.\r\n                if (key === 'true-value') {\r\n                    el._trueValue = nextValue;\r\n                }\r\n                else if (key === 'false-value') {\r\n                    el._falseValue = nextValue;\r\n                }\r\n                patchAttr(el, key, nextValue, isSVG);\r\n            }\r\n            break;\r\n    }\r\n};\r\nfunction shouldSetAsProp(el, key, value, isSVG) {\r\n    if (isSVG) {\r\n        // most keys must be set as attribute on svg elements to work\r\n        // ...except innerHTML\r\n        if (key === 'innerHTML') {\r\n            return true;\r\n        }\r\n        // or native onclick with function values\r\n        if (key in el && nativeOnRE.test(key) && isFunction(value)) {\r\n            return true;\r\n        }\r\n        return false;\r\n    }\r\n    // spellcheck and draggable are numerated attrs, however their\r\n    // corresponding DOM properties are actually booleans - this leads to\r\n    // setting it with a string \"false\" value leading it to be coerced to\r\n    // `true`, so we need to always treat them as attributes.\r\n    // Note that `contentEditable` doesn't have this problem: its DOM\r\n    // property is also enumerated string values.\r\n    if (key === 'spellcheck' || key === 'draggable') {\r\n        return false;\r\n    }\r\n    // #1787, #2840 form property on form elements is readonly and must be set as\r\n    // attribute.\r\n    if (key === 'form') {\r\n        return false;\r\n    }\r\n    // #1526 <input list> must be set as attribute\r\n    if (key === 'list' && el.tagName === 'INPUT') {\r\n        return false;\r\n    }\r\n    // #2766 <textarea type> must be set as attribute\r\n    if (key === 'type' && el.tagName === 'TEXTAREA') {\r\n        return false;\r\n    }\r\n    // native onclick with string value, must be set as attribute\r\n    if (nativeOnRE.test(key) && isString(value)) {\r\n        return false;\r\n    }\r\n    return key in el;\r\n}\n\nfunction useCssModule(name = '$style') {\r\n    /* istanbul ignore else */\r\n    {\r\n        const instance = getCurrentInstance();\r\n        if (!instance) {\r\n            (process.env.NODE_ENV !== 'production') && warn(`useCssModule must be called inside setup()`);\r\n            return EMPTY_OBJ;\r\n        }\r\n        const modules = instance.type.__cssModules;\r\n        if (!modules) {\r\n            (process.env.NODE_ENV !== 'production') && warn(`Current instance does not have CSS modules injected.`);\r\n            return EMPTY_OBJ;\r\n        }\r\n        const mod = modules[name];\r\n        if (!mod) {\r\n            (process.env.NODE_ENV !== 'production') &&\r\n                warn(`Current instance does not have CSS module named \"${name}\".`);\r\n            return EMPTY_OBJ;\r\n        }\r\n        return mod;\r\n    }\r\n}\n\n/**\r\n * Runtime helper for SFC's CSS variable injection feature.\r\n * @private\r\n */\r\nfunction useCssVars(getter) {\r\n    const instance = getCurrentInstance();\r\n    /* istanbul ignore next */\r\n    if (!instance) {\r\n        (process.env.NODE_ENV !== 'production') &&\r\n            warn(`useCssVars is called without current active component instance.`);\r\n        return;\r\n    }\r\n    const setVars = () => setVarsOnVNode(instance.subTree, getter(instance.proxy));\r\n    onMounted(() => watchEffect(setVars, { flush: 'post' }));\r\n    onUpdated(setVars);\r\n}\r\nfunction setVarsOnVNode(vnode, vars) {\r\n    if (vnode.shapeFlag & 128 /* SUSPENSE */) {\r\n        const suspense = vnode.suspense;\r\n        vnode = suspense.activeBranch;\r\n        if (suspense.pendingBranch && !suspense.isHydrating) {\r\n            suspense.effects.push(() => {\r\n                setVarsOnVNode(suspense.activeBranch, vars);\r\n            });\r\n        }\r\n    }\r\n    // drill down HOCs until it's a non-component vnode\r\n    while (vnode.component) {\r\n        vnode = vnode.component.subTree;\r\n    }\r\n    if (vnode.shapeFlag & 1 /* ELEMENT */ && vnode.el) {\r\n        const style = vnode.el.style;\r\n        for (const key in vars) {\r\n            style.setProperty(`--${key}`, vars[key]);\r\n        }\r\n    }\r\n    else if (vnode.type === Fragment) {\r\n        vnode.children.forEach(c => setVarsOnVNode(c, vars));\r\n    }\r\n}\n\nconst TRANSITION = 'transition';\r\nconst ANIMATION = 'animation';\r\n// DOM Transition is a higher-order-component based on the platform-agnostic\r\n// base Transition component, with DOM-specific logic.\r\nconst Transition = (props, { slots }) => h(BaseTransition, resolveTransitionProps(props), slots);\r\nTransition.displayName = 'Transition';\r\nconst DOMTransitionPropsValidators = {\r\n    name: String,\r\n    type: String,\r\n    css: {\r\n        type: Boolean,\r\n        default: true\r\n    },\r\n    duration: [String, Number, Object],\r\n    enterFromClass: String,\r\n    enterActiveClass: String,\r\n    enterToClass: String,\r\n    appearFromClass: String,\r\n    appearActiveClass: String,\r\n    appearToClass: String,\r\n    leaveFromClass: String,\r\n    leaveActiveClass: String,\r\n    leaveToClass: String\r\n};\r\nconst TransitionPropsValidators = (Transition.props = /*#__PURE__*/ extend({}, BaseTransition.props, DOMTransitionPropsValidators));\r\nfunction resolveTransitionProps(rawProps) {\r\n    let { name = 'v', type, css = true, duration, enterFromClass = `${name}-enter-from`, enterActiveClass = `${name}-enter-active`, enterToClass = `${name}-enter-to`, appearFromClass = enterFromClass, appearActiveClass = enterActiveClass, appearToClass = enterToClass, leaveFromClass = `${name}-leave-from`, leaveActiveClass = `${name}-leave-active`, leaveToClass = `${name}-leave-to` } = rawProps;\r\n    const baseProps = {};\r\n    for (const key in rawProps) {\r\n        if (!(key in DOMTransitionPropsValidators)) {\r\n            baseProps[key] = rawProps[key];\r\n        }\r\n    }\r\n    if (!css) {\r\n        return baseProps;\r\n    }\r\n    const durations = normalizeDuration(duration);\r\n    const enterDuration = durations && durations[0];\r\n    const leaveDuration = durations && durations[1];\r\n    const { onBeforeEnter, onEnter, onEnterCancelled, onLeave, onLeaveCancelled, onBeforeAppear = onBeforeEnter, onAppear = onEnter, onAppearCancelled = onEnterCancelled } = baseProps;\r\n    const finishEnter = (el, isAppear, done) => {\r\n        removeTransitionClass(el, isAppear ? appearToClass : enterToClass);\r\n        removeTransitionClass(el, isAppear ? appearActiveClass : enterActiveClass);\r\n        done && done();\r\n    };\r\n    const finishLeave = (el, done) => {\r\n        removeTransitionClass(el, leaveToClass);\r\n        removeTransitionClass(el, leaveActiveClass);\r\n        done && done();\r\n    };\r\n    const makeEnterHook = (isAppear) => {\r\n        return (el, done) => {\r\n            const hook = isAppear ? onAppear : onEnter;\r\n            const resolve = () => finishEnter(el, isAppear, done);\r\n            hook && hook(el, resolve);\r\n            nextFrame(() => {\r\n                removeTransitionClass(el, isAppear ? appearFromClass : enterFromClass);\r\n                addTransitionClass(el, isAppear ? appearToClass : enterToClass);\r\n                if (!(hook && hook.length > 1)) {\r\n                    whenTransitionEnds(el, type, enterDuration, resolve);\r\n                }\r\n            });\r\n        };\r\n    };\r\n    return extend(baseProps, {\r\n        onBeforeEnter(el) {\r\n            onBeforeEnter && onBeforeEnter(el);\r\n            addTransitionClass(el, enterFromClass);\r\n            addTransitionClass(el, enterActiveClass);\r\n        },\r\n        onBeforeAppear(el) {\r\n            onBeforeAppear && onBeforeAppear(el);\r\n            addTransitionClass(el, appearFromClass);\r\n            addTransitionClass(el, appearActiveClass);\r\n        },\r\n        onEnter: makeEnterHook(false),\r\n        onAppear: makeEnterHook(true),\r\n        onLeave(el, done) {\r\n            const resolve = () => finishLeave(el, done);\r\n            addTransitionClass(el, leaveFromClass);\r\n            // force reflow so *-leave-from classes immediately take effect (#2593)\r\n            forceReflow();\r\n            addTransitionClass(el, leaveActiveClass);\r\n            nextFrame(() => {\r\n                removeTransitionClass(el, leaveFromClass);\r\n                addTransitionClass(el, leaveToClass);\r\n                if (!(onLeave && onLeave.length > 1)) {\r\n                    whenTransitionEnds(el, type, leaveDuration, resolve);\r\n                }\r\n            });\r\n            onLeave && onLeave(el, resolve);\r\n        },\r\n        onEnterCancelled(el) {\r\n            finishEnter(el, false);\r\n            onEnterCancelled && onEnterCancelled(el);\r\n        },\r\n        onAppearCancelled(el) {\r\n            finishEnter(el, true);\r\n            onAppearCancelled && onAppearCancelled(el);\r\n        },\r\n        onLeaveCancelled(el) {\r\n            finishLeave(el);\r\n            onLeaveCancelled && onLeaveCancelled(el);\r\n        }\r\n    });\r\n}\r\nfunction normalizeDuration(duration) {\r\n    if (duration == null) {\r\n        return null;\r\n    }\r\n    else if (isObject(duration)) {\r\n        return [NumberOf(duration.enter), NumberOf(duration.leave)];\r\n    }\r\n    else {\r\n        const n = NumberOf(duration);\r\n        return [n, n];\r\n    }\r\n}\r\nfunction NumberOf(val) {\r\n    const res = toNumber(val);\r\n    if ((process.env.NODE_ENV !== 'production'))\r\n        validateDuration(res);\r\n    return res;\r\n}\r\nfunction validateDuration(val) {\r\n    if (typeof val !== 'number') {\r\n        warn(`<transition> explicit duration is not a valid number - ` +\r\n            `got ${JSON.stringify(val)}.`);\r\n    }\r\n    else if (isNaN(val)) {\r\n        warn(`<transition> explicit duration is NaN - ` +\r\n            'the duration expression might be incorrect.');\r\n    }\r\n}\r\nfunction addTransitionClass(el, cls) {\r\n    cls.split(/\\s+/).forEach(c => c && el.classList.add(c));\r\n    (el._vtc ||\r\n        (el._vtc = new Set())).add(cls);\r\n}\r\nfunction removeTransitionClass(el, cls) {\r\n    cls.split(/\\s+/).forEach(c => c && el.classList.remove(c));\r\n    const { _vtc } = el;\r\n    if (_vtc) {\r\n        _vtc.delete(cls);\r\n        if (!_vtc.size) {\r\n            el._vtc = undefined;\r\n        }\r\n    }\r\n}\r\nfunction nextFrame(cb) {\r\n    requestAnimationFrame(() => {\r\n        requestAnimationFrame(cb);\r\n    });\r\n}\r\nlet endId = 0;\r\nfunction whenTransitionEnds(el, expectedType, explicitTimeout, resolve) {\r\n    const id = (el._endId = ++endId);\r\n    const resolveIfNotStale = () => {\r\n        if (id === el._endId) {\r\n            resolve();\r\n        }\r\n    };\r\n    if (explicitTimeout) {\r\n        return setTimeout(resolveIfNotStale, explicitTimeout);\r\n    }\r\n    const { type, timeout, propCount } = getTransitionInfo(el, expectedType);\r\n    if (!type) {\r\n        return resolve();\r\n    }\r\n    const endEvent = type + 'end';\r\n    let ended = 0;\r\n    const end = () => {\r\n        el.removeEventListener(endEvent, onEnd);\r\n        resolveIfNotStale();\r\n    };\r\n    const onEnd = (e) => {\r\n        if (e.target === el && ++ended >= propCount) {\r\n            end();\r\n        }\r\n    };\r\n    setTimeout(() => {\r\n        if (ended < propCount) {\r\n            end();\r\n        }\r\n    }, timeout + 1);\r\n    el.addEventListener(endEvent, onEnd);\r\n}\r\nfunction getTransitionInfo(el, expectedType) {\r\n    const styles = window.getComputedStyle(el);\r\n    // JSDOM may return undefined for transition properties\r\n    const getStyleProperties = (key) => (styles[key] || '').split(', ');\r\n    const transitionDelays = getStyleProperties(TRANSITION + 'Delay');\r\n    const transitionDurations = getStyleProperties(TRANSITION + 'Duration');\r\n    const transitionTimeout = getTimeout(transitionDelays, transitionDurations);\r\n    const animationDelays = getStyleProperties(ANIMATION + 'Delay');\r\n    const animationDurations = getStyleProperties(ANIMATION + 'Duration');\r\n    const animationTimeout = getTimeout(animationDelays, animationDurations);\r\n    let type = null;\r\n    let timeout = 0;\r\n    let propCount = 0;\r\n    /* istanbul ignore if */\r\n    if (expectedType === TRANSITION) {\r\n        if (transitionTimeout > 0) {\r\n            type = TRANSITION;\r\n            timeout = transitionTimeout;\r\n            propCount = transitionDurations.length;\r\n        }\r\n    }\r\n    else if (expectedType === ANIMATION) {\r\n        if (animationTimeout > 0) {\r\n            type = ANIMATION;\r\n            timeout = animationTimeout;\r\n            propCount = animationDurations.length;\r\n        }\r\n    }\r\n    else {\r\n        timeout = Math.max(transitionTimeout, animationTimeout);\r\n        type =\r\n            timeout > 0\r\n                ? transitionTimeout > animationTimeout\r\n                    ? TRANSITION\r\n                    : ANIMATION\r\n                : null;\r\n        propCount = type\r\n            ? type === TRANSITION\r\n                ? transitionDurations.length\r\n                : animationDurations.length\r\n            : 0;\r\n    }\r\n    const hasTransform = type === TRANSITION &&\r\n        /\\b(transform|all)(,|$)/.test(styles[TRANSITION + 'Property']);\r\n    return {\r\n        type,\r\n        timeout,\r\n        propCount,\r\n        hasTransform\r\n    };\r\n}\r\nfunction getTimeout(delays, durations) {\r\n    while (delays.length < durations.length) {\r\n        delays = delays.concat(delays);\r\n    }\r\n    return Math.max(...durations.map((d, i) => toMs(d) + toMs(delays[i])));\r\n}\r\n// Old versions of Chromium (below 61.0.3163.100) formats floating pointer\r\n// numbers in a locale-dependent way, using a comma instead of a dot.\r\n// If comma is not replaced with a dot, the input will be rounded down\r\n// (i.e. acting as a floor function) causing unexpected behaviors\r\nfunction toMs(s) {\r\n    return Number(s.slice(0, -1).replace(',', '.')) * 1000;\r\n}\r\n// synchronously force layout to put elements into a certain state\r\nfunction forceReflow() {\r\n    return document.body.offsetHeight;\r\n}\n\nconst positionMap = new WeakMap();\r\nconst newPositionMap = new WeakMap();\r\nconst TransitionGroupImpl = {\r\n    name: 'TransitionGroup',\r\n    props: /*#__PURE__*/ extend({}, TransitionPropsValidators, {\r\n        tag: String,\r\n        moveClass: String\r\n    }),\r\n    setup(props, { slots }) {\r\n        const instance = getCurrentInstance();\r\n        const state = useTransitionState();\r\n        let prevChildren;\r\n        let children;\r\n        onUpdated(() => {\r\n            // children is guaranteed to exist after initial render\r\n            if (!prevChildren.length) {\r\n                return;\r\n            }\r\n            const moveClass = props.moveClass || `${props.name || 'v'}-move`;\r\n            if (!hasCSSTransform(prevChildren[0].el, instance.vnode.el, moveClass)) {\r\n                return;\r\n            }\r\n            // we divide the work into three loops to avoid mixing DOM reads and writes\r\n            // in each iteration - which helps prevent layout thrashing.\r\n            prevChildren.forEach(callPendingCbs);\r\n            prevChildren.forEach(recordPosition);\r\n            const movedChildren = prevChildren.filter(applyTranslation);\r\n            // force reflow to put everything in position\r\n            forceReflow();\r\n            movedChildren.forEach(c => {\r\n                const el = c.el;\r\n                const style = el.style;\r\n                addTransitionClass(el, moveClass);\r\n                style.transform = style.webkitTransform = style.transitionDuration = '';\r\n                const cb = (el._moveCb = (e) => {\r\n                    if (e && e.target !== el) {\r\n                        return;\r\n                    }\r\n                    if (!e || /transform$/.test(e.propertyName)) {\r\n                        el.removeEventListener('transitionend', cb);\r\n                        el._moveCb = null;\r\n                        removeTransitionClass(el, moveClass);\r\n                    }\r\n                });\r\n                el.addEventListener('transitionend', cb);\r\n            });\r\n        });\r\n        return () => {\r\n            const rawProps = toRaw(props);\r\n            const cssTransitionProps = resolveTransitionProps(rawProps);\r\n            const tag = rawProps.tag || Fragment;\r\n            prevChildren = children;\r\n            children = slots.default ? getTransitionRawChildren(slots.default()) : [];\r\n            for (let i = 0; i < children.length; i++) {\r\n                const child = children[i];\r\n                if (child.key != null) {\r\n                    setTransitionHooks(child, resolveTransitionHooks(child, cssTransitionProps, state, instance));\r\n                }\r\n                else if ((process.env.NODE_ENV !== 'production')) {\r\n                    warn(`<TransitionGroup> children must be keyed.`);\r\n                }\r\n            }\r\n            if (prevChildren) {\r\n                for (let i = 0; i < prevChildren.length; i++) {\r\n                    const child = prevChildren[i];\r\n                    setTransitionHooks(child, resolveTransitionHooks(child, cssTransitionProps, state, instance));\r\n                    positionMap.set(child, child.el.getBoundingClientRect());\r\n                }\r\n            }\r\n            return createVNode(tag, null, children);\r\n        };\r\n    }\r\n};\r\nconst TransitionGroup = TransitionGroupImpl;\r\nfunction callPendingCbs(c) {\r\n    const el = c.el;\r\n    if (el._moveCb) {\r\n        el._moveCb();\r\n    }\r\n    if (el._enterCb) {\r\n        el._enterCb();\r\n    }\r\n}\r\nfunction recordPosition(c) {\r\n    newPositionMap.set(c, c.el.getBoundingClientRect());\r\n}\r\nfunction applyTranslation(c) {\r\n    const oldPos = positionMap.get(c);\r\n    const newPos = newPositionMap.get(c);\r\n    const dx = oldPos.left - newPos.left;\r\n    const dy = oldPos.top - newPos.top;\r\n    if (dx || dy) {\r\n        const s = c.el.style;\r\n        s.transform = s.webkitTransform = `translate(${dx}px,${dy}px)`;\r\n        s.transitionDuration = '0s';\r\n        return c;\r\n    }\r\n}\r\nfunction hasCSSTransform(el, root, moveClass) {\r\n    // Detect whether an element with the move class applied has\r\n    // CSS transitions. Since the element may be inside an entering\r\n    // transition at this very moment, we make a clone of it and remove\r\n    // all other transition classes applied to ensure only the move class\r\n    // is applied.\r\n    const clone = el.cloneNode();\r\n    if (el._vtc) {\r\n        el._vtc.forEach(cls => {\r\n            cls.split(/\\s+/).forEach(c => c && clone.classList.remove(c));\r\n        });\r\n    }\r\n    moveClass.split(/\\s+/).forEach(c => c && clone.classList.add(c));\r\n    clone.style.display = 'none';\r\n    const container = (root.nodeType === 1\r\n        ? root\r\n        : root.parentNode);\r\n    container.appendChild(clone);\r\n    const { hasTransform } = getTransitionInfo(clone);\r\n    container.removeChild(clone);\r\n    return hasTransform;\r\n}\n\nconst getModelAssigner = (vnode) => {\r\n    const fn = vnode.props['onUpdate:modelValue'];\r\n    return isArray(fn) ? value => invokeArrayFns(fn, value) : fn;\r\n};\r\nfunction onCompositionStart(e) {\r\n    e.target.composing = true;\r\n}\r\nfunction onCompositionEnd(e) {\r\n    const target = e.target;\r\n    if (target.composing) {\r\n        target.composing = false;\r\n        trigger(target, 'input');\r\n    }\r\n}\r\nfunction trigger(el, type) {\r\n    const e = document.createEvent('HTMLEvents');\r\n    e.initEvent(type, true, true);\r\n    el.dispatchEvent(e);\r\n}\r\n// We are exporting the v-model runtime directly as vnode hooks so that it can\r\n// be tree-shaken in case v-model is never used.\r\nconst vModelText = {\r\n    created(el, { modifiers: { lazy, trim, number } }, vnode) {\r\n        el._assign = getModelAssigner(vnode);\r\n        const castToNumber = number || el.type === 'number';\r\n        addEventListener(el, lazy ? 'change' : 'input', e => {\r\n            if (e.target.composing)\r\n                return;\r\n            let domValue = el.value;\r\n            if (trim) {\r\n                domValue = domValue.trim();\r\n            }\r\n            else if (castToNumber) {\r\n                domValue = toNumber(domValue);\r\n            }\r\n            el._assign(domValue);\r\n        });\r\n        if (trim) {\r\n            addEventListener(el, 'change', () => {\r\n                el.value = el.value.trim();\r\n            });\r\n        }\r\n        if (!lazy) {\r\n            addEventListener(el, 'compositionstart', onCompositionStart);\r\n            addEventListener(el, 'compositionend', onCompositionEnd);\r\n            // Safari < 10.2 & UIWebView doesn't fire compositionend when\r\n            // switching focus before confirming composition choice\r\n            // this also fixes the issue where some browsers e.g. iOS Chrome\r\n            // fires \"change\" instead of \"input\" on autocomplete.\r\n            addEventListener(el, 'change', onCompositionEnd);\r\n        }\r\n    },\r\n    // set value on mounted so it's after min/max for type=\"range\"\r\n    mounted(el, { value }) {\r\n        el.value = value == null ? '' : value;\r\n    },\r\n    beforeUpdate(el, { value, modifiers: { trim, number } }, vnode) {\r\n        el._assign = getModelAssigner(vnode);\r\n        // avoid clearing unresolved text. #2302\r\n        if (el.composing)\r\n            return;\r\n        if (document.activeElement === el) {\r\n            if (trim && el.value.trim() === value) {\r\n                return;\r\n            }\r\n            if ((number || el.type === 'number') && toNumber(el.value) === value) {\r\n                return;\r\n            }\r\n        }\r\n        const newValue = value == null ? '' : value;\r\n        if (el.value !== newValue) {\r\n            el.value = newValue;\r\n        }\r\n    }\r\n};\r\nconst vModelCheckbox = {\r\n    created(el, _, vnode) {\r\n        el._assign = getModelAssigner(vnode);\r\n        addEventListener(el, 'change', () => {\r\n            const modelValue = el._modelValue;\r\n            const elementValue = getValue(el);\r\n            const checked = el.checked;\r\n            const assign = el._assign;\r\n            if (isArray(modelValue)) {\r\n                const index = looseIndexOf(modelValue, elementValue);\r\n                const found = index !== -1;\r\n                if (checked && !found) {\r\n                    assign(modelValue.concat(elementValue));\r\n                }\r\n                else if (!checked && found) {\r\n                    const filtered = [...modelValue];\r\n                    filtered.splice(index, 1);\r\n                    assign(filtered);\r\n                }\r\n            }\r\n            else if (isSet(modelValue)) {\r\n                const cloned = new Set(modelValue);\r\n                if (checked) {\r\n                    cloned.add(elementValue);\r\n                }\r\n                else {\r\n                    cloned.delete(elementValue);\r\n                }\r\n                assign(cloned);\r\n            }\r\n            else {\r\n                assign(getCheckboxValue(el, checked));\r\n            }\r\n        });\r\n    },\r\n    // set initial checked on mount to wait for true-value/false-value\r\n    mounted: setChecked,\r\n    beforeUpdate(el, binding, vnode) {\r\n        el._assign = getModelAssigner(vnode);\r\n        setChecked(el, binding, vnode);\r\n    }\r\n};\r\nfunction setChecked(el, { value, oldValue }, vnode) {\r\n    el._modelValue = value;\r\n    if (isArray(value)) {\r\n        el.checked = looseIndexOf(value, vnode.props.value) > -1;\r\n    }\r\n    else if (isSet(value)) {\r\n        el.checked = value.has(vnode.props.value);\r\n    }\r\n    else if (value !== oldValue) {\r\n        el.checked = looseEqual(value, getCheckboxValue(el, true));\r\n    }\r\n}\r\nconst vModelRadio = {\r\n    created(el, { value }, vnode) {\r\n        el.checked = looseEqual(value, vnode.props.value);\r\n        el._assign = getModelAssigner(vnode);\r\n        addEventListener(el, 'change', () => {\r\n            el._assign(getValue(el));\r\n        });\r\n    },\r\n    beforeUpdate(el, { value, oldValue }, vnode) {\r\n        el._assign = getModelAssigner(vnode);\r\n        if (value !== oldValue) {\r\n            el.checked = looseEqual(value, vnode.props.value);\r\n        }\r\n    }\r\n};\r\nconst vModelSelect = {\r\n    created(el, { value, modifiers: { number } }, vnode) {\r\n        const isSetModel = isSet(value);\r\n        addEventListener(el, 'change', () => {\r\n            const selectedVal = Array.prototype.filter\r\n                .call(el.options, (o) => o.selected)\r\n                .map((o) => number ? toNumber(getValue(o)) : getValue(o));\r\n            el._assign(el.multiple\r\n                ? isSetModel\r\n                    ? new Set(selectedVal)\r\n                    : selectedVal\r\n                : selectedVal[0]);\r\n        });\r\n        el._assign = getModelAssigner(vnode);\r\n    },\r\n    // set value in mounted & updated because <select> relies on its children\r\n    // <option>s.\r\n    mounted(el, { value }) {\r\n        setSelected(el, value);\r\n    },\r\n    beforeUpdate(el, _binding, vnode) {\r\n        el._assign = getModelAssigner(vnode);\r\n    },\r\n    updated(el, { value }) {\r\n        setSelected(el, value);\r\n    }\r\n};\r\nfunction setSelected(el, value) {\r\n    const isMultiple = el.multiple;\r\n    if (isMultiple && !isArray(value) && !isSet(value)) {\r\n        (process.env.NODE_ENV !== 'production') &&\r\n            warn(`<select multiple v-model> expects an Array or Set value for its binding, ` +\r\n                `but got ${Object.prototype.toString.call(value).slice(8, -1)}.`);\r\n        return;\r\n    }\r\n    for (let i = 0, l = el.options.length; i < l; i++) {\r\n        const option = el.options[i];\r\n        const optionValue = getValue(option);\r\n        if (isMultiple) {\r\n            if (isArray(value)) {\r\n                option.selected = looseIndexOf(value, optionValue) > -1;\r\n            }\r\n            else {\r\n                option.selected = value.has(optionValue);\r\n            }\r\n        }\r\n        else {\r\n            if (looseEqual(getValue(option), value)) {\r\n                el.selectedIndex = i;\r\n                return;\r\n            }\r\n        }\r\n    }\r\n    if (!isMultiple) {\r\n        el.selectedIndex = -1;\r\n    }\r\n}\r\n// retrieve raw value set via :value bindings\r\nfunction getValue(el) {\r\n    return '_value' in el ? el._value : el.value;\r\n}\r\n// retrieve raw value for true-value and false-value set via :true-value or :false-value bindings\r\nfunction getCheckboxValue(el, checked) {\r\n    const key = checked ? '_trueValue' : '_falseValue';\r\n    return key in el ? el[key] : checked;\r\n}\r\nconst vModelDynamic = {\r\n    created(el, binding, vnode) {\r\n        callModelHook(el, binding, vnode, null, 'created');\r\n    },\r\n    mounted(el, binding, vnode) {\r\n        callModelHook(el, binding, vnode, null, 'mounted');\r\n    },\r\n    beforeUpdate(el, binding, vnode, prevVNode) {\r\n        callModelHook(el, binding, vnode, prevVNode, 'beforeUpdate');\r\n    },\r\n    updated(el, binding, vnode, prevVNode) {\r\n        callModelHook(el, binding, vnode, prevVNode, 'updated');\r\n    }\r\n};\r\nfunction callModelHook(el, binding, vnode, prevVNode, hook) {\r\n    let modelToUse;\r\n    switch (el.tagName) {\r\n        case 'SELECT':\r\n            modelToUse = vModelSelect;\r\n            break;\r\n        case 'TEXTAREA':\r\n            modelToUse = vModelText;\r\n            break;\r\n        default:\r\n            switch (vnode.props && vnode.props.type) {\r\n                case 'checkbox':\r\n                    modelToUse = vModelCheckbox;\r\n                    break;\r\n                case 'radio':\r\n                    modelToUse = vModelRadio;\r\n                    break;\r\n                default:\r\n                    modelToUse = vModelText;\r\n            }\r\n    }\r\n    const fn = modelToUse[hook];\r\n    fn && fn(el, binding, vnode, prevVNode);\r\n}\n\nconst systemModifiers = ['ctrl', 'shift', 'alt', 'meta'];\r\nconst modifierGuards = {\r\n    stop: e => e.stopPropagation(),\r\n    prevent: e => e.preventDefault(),\r\n    self: e => e.target !== e.currentTarget,\r\n    ctrl: e => !e.ctrlKey,\r\n    shift: e => !e.shiftKey,\r\n    alt: e => !e.altKey,\r\n    meta: e => !e.metaKey,\r\n    left: e => 'button' in e && e.button !== 0,\r\n    middle: e => 'button' in e && e.button !== 1,\r\n    right: e => 'button' in e && e.button !== 2,\r\n    exact: (e, modifiers) => systemModifiers.some(m => e[`${m}Key`] && !modifiers.includes(m))\r\n};\r\n/**\r\n * @private\r\n */\r\nconst withModifiers = (fn, modifiers) => {\r\n    return (event, ...args) => {\r\n        for (let i = 0; i < modifiers.length; i++) {\r\n            const guard = modifierGuards[modifiers[i]];\r\n            if (guard && guard(event, modifiers))\r\n                return;\r\n        }\r\n        return fn(event, ...args);\r\n    };\r\n};\r\n// Kept for 2.x compat.\r\n// Note: IE11 compat for `spacebar` and `del` is removed for now.\r\nconst keyNames = {\r\n    esc: 'escape',\r\n    space: ' ',\r\n    up: 'arrow-up',\r\n    left: 'arrow-left',\r\n    right: 'arrow-right',\r\n    down: 'arrow-down',\r\n    delete: 'backspace'\r\n};\r\n/**\r\n * @private\r\n */\r\nconst withKeys = (fn, modifiers) => {\r\n    return (event) => {\r\n        if (!('key' in event))\r\n            return;\r\n        const eventKey = hyphenate(event.key);\r\n        if (\r\n        // None of the provided key modifiers match the current event key\r\n        !modifiers.some(k => k === eventKey || keyNames[k] === eventKey)) {\r\n            return;\r\n        }\r\n        return fn(event);\r\n    };\r\n};\n\nconst vShow = {\r\n    beforeMount(el, { value }, { transition }) {\r\n        el._vod = el.style.display === 'none' ? '' : el.style.display;\r\n        if (transition && value) {\r\n            transition.beforeEnter(el);\r\n        }\r\n        else {\r\n            setDisplay(el, value);\r\n        }\r\n    },\r\n    mounted(el, { value }, { transition }) {\r\n        if (transition && value) {\r\n            transition.enter(el);\r\n        }\r\n    },\r\n    updated(el, { value, oldValue }, { transition }) {\r\n        if (!value === !oldValue)\r\n            return;\r\n        if (transition) {\r\n            if (value) {\r\n                transition.beforeEnter(el);\r\n                setDisplay(el, true);\r\n                transition.enter(el);\r\n            }\r\n            else {\r\n                transition.leave(el, () => {\r\n                    setDisplay(el, false);\r\n                });\r\n            }\r\n        }\r\n        else {\r\n            setDisplay(el, value);\r\n        }\r\n    },\r\n    beforeUnmount(el, { value }) {\r\n        setDisplay(el, value);\r\n    }\r\n};\r\nfunction setDisplay(el, value) {\r\n    el.style.display = value ? el._vod : 'none';\r\n}\n\nconst rendererOptions = extend({ patchProp, forcePatchProp }, nodeOps);\r\n// lazy create the renderer - this makes core renderer logic tree-shakable\r\n// in case the user only imports reactivity utilities from Vue.\r\nlet renderer;\r\nlet enabledHydration = false;\r\nfunction ensureRenderer() {\r\n    return renderer || (renderer = createRenderer(rendererOptions));\r\n}\r\nfunction ensureHydrationRenderer() {\r\n    renderer = enabledHydration\r\n        ? renderer\r\n        : createHydrationRenderer(rendererOptions);\r\n    enabledHydration = true;\r\n    return renderer;\r\n}\r\n// use explicit type casts here to avoid import() calls in rolled-up d.ts\r\nconst render = ((...args) => {\r\n    ensureRenderer().render(...args);\r\n});\r\nconst hydrate = ((...args) => {\r\n    ensureHydrationRenderer().hydrate(...args);\r\n});\r\nconst createApp = ((...args) => {\r\n    const app = ensureRenderer().createApp(...args);\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        injectNativeTagCheck(app);\r\n        injectCustomElementCheck(app);\r\n    }\r\n    const { mount } = app;\r\n    app.mount = (containerOrSelector) => {\r\n        const container = normalizeContainer(containerOrSelector);\r\n        if (!container)\r\n            return;\r\n        const component = app._component;\r\n        if (!isFunction(component) && !component.render && !component.template) {\r\n            component.template = container.innerHTML;\r\n        }\r\n        // clear content before mounting\r\n        container.innerHTML = '';\r\n        const proxy = mount(container, false, container instanceof SVGElement);\r\n        if (container instanceof Element) {\r\n            container.removeAttribute('v-cloak');\r\n            container.setAttribute('data-v-app', '');\r\n        }\r\n        return proxy;\r\n    };\r\n    return app;\r\n});\r\nconst createSSRApp = ((...args) => {\r\n    const app = ensureHydrationRenderer().createApp(...args);\r\n    if ((process.env.NODE_ENV !== 'production')) {\r\n        injectNativeTagCheck(app);\r\n        injectCustomElementCheck(app);\r\n    }\r\n    const { mount } = app;\r\n    app.mount = (containerOrSelector) => {\r\n        const container = normalizeContainer(containerOrSelector);\r\n        if (container) {\r\n            return mount(container, true, container instanceof SVGElement);\r\n        }\r\n    };\r\n    return app;\r\n});\r\nfunction injectNativeTagCheck(app) {\r\n    // Inject `isNativeTag`\r\n    // this is used for component name validation (dev only)\r\n    Object.defineProperty(app.config, 'isNativeTag', {\r\n        value: (tag) => isHTMLTag(tag) || isSVGTag(tag),\r\n        writable: false\r\n    });\r\n}\r\n// dev only\r\nfunction injectCustomElementCheck(app) {\r\n    if (isRuntimeOnly()) {\r\n        const value = app.config.isCustomElement;\r\n        Object.defineProperty(app.config, 'isCustomElement', {\r\n            get() {\r\n                return value;\r\n            },\r\n            set() {\r\n                warn(`The \\`isCustomElement\\` config option is only respected when using the runtime compiler.` +\r\n                    `If you are using the runtime-only build, \\`isCustomElement\\` must be passed to \\`@vue/compiler-dom\\` in the build setup instead` +\r\n                    `- for example, via the \\`compilerOptions\\` option in vue-loader: https://vue-loader.vuejs.org/options.html#compileroptions.`);\r\n            }\r\n        });\r\n    }\r\n}\r\nfunction normalizeContainer(container) {\r\n    if (isString(container)) {\r\n        const res = document.querySelector(container);\r\n        if ((process.env.NODE_ENV !== 'production') && !res) {\r\n            warn(`Failed to mount app: mount target selector \"${container}\" returned null.`);\r\n        }\r\n        return res;\r\n    }\r\n    if ((process.env.NODE_ENV !== 'production') &&\r\n        container instanceof window.ShadowRoot &&\r\n        container.mode === 'closed') {\r\n        warn(`mounting on a ShadowRoot with \\`{mode: \"closed\"}\\` may lead to unpredictable bugs`);\r\n    }\r\n    return container;\r\n}\n\nexport { Transition, TransitionGroup, createApp, createSSRApp, hydrate, render, useCssModule, useCssVars, vModelCheckbox, vModelDynamic, vModelRadio, vModelSelect, vModelText, vShow, withKeys, withModifiers };\n","var requireObjectCoercible = require('../internals/require-object-coercible');\n\n// `ToObject` abstract operation\n// https://tc39.es/ecma262/#sec-toobject\nmodule.exports = function (argument) {\n  return Object(requireObjectCoercible(argument));\n};\n","/*!\n  * Bootstrap v5.1.3 (https://getbootstrap.com/)\n  * Copyright 2011-2021 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)\n  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n  */\nimport * as Popper from '@popperjs/core';\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): util/index.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nconst MAX_UID = 1000000;\nconst MILLISECONDS_MULTIPLIER = 1000;\nconst TRANSITION_END = 'transitionend'; // Shoutout AngusCroll (https://goo.gl/pxwQGp)\n\nconst toType = obj => {\n  if (obj === null || obj === undefined) {\n    return `${obj}`;\n  }\n\n  return {}.toString.call(obj).match(/\\s([a-z]+)/i)[1].toLowerCase();\n};\n/**\n * --------------------------------------------------------------------------\n * Public Util Api\n * --------------------------------------------------------------------------\n */\n\n\nconst getUID = prefix => {\n  do {\n    prefix += Math.floor(Math.random() * MAX_UID);\n  } while (document.getElementById(prefix));\n\n  return prefix;\n};\n\nconst getSelector = element => {\n  let selector = element.getAttribute('data-bs-target');\n\n  if (!selector || selector === '#') {\n    let hrefAttr = element.getAttribute('href'); // The only valid content that could double as a selector are IDs or classes,\n    // so everything starting with `#` or `.`. If a \"real\" URL is used as the selector,\n    // `document.querySelector` will rightfully complain it is invalid.\n    // See https://github.com/twbs/bootstrap/issues/32273\n\n    if (!hrefAttr || !hrefAttr.includes('#') && !hrefAttr.startsWith('.')) {\n      return null;\n    } // Just in case some CMS puts out a full URL with the anchor appended\n\n\n    if (hrefAttr.includes('#') && !hrefAttr.startsWith('#')) {\n      hrefAttr = `#${hrefAttr.split('#')[1]}`;\n    }\n\n    selector = hrefAttr && hrefAttr !== '#' ? hrefAttr.trim() : null;\n  }\n\n  return selector;\n};\n\nconst getSelectorFromElement = element => {\n  const selector = getSelector(element);\n\n  if (selector) {\n    return document.querySelector(selector) ? selector : null;\n  }\n\n  return null;\n};\n\nconst getElementFromSelector = element => {\n  const selector = getSelector(element);\n  return selector ? document.querySelector(selector) : null;\n};\n\nconst getTransitionDurationFromElement = element => {\n  if (!element) {\n    return 0;\n  } // Get transition-duration of the element\n\n\n  let {\n    transitionDuration,\n    transitionDelay\n  } = window.getComputedStyle(element);\n  const floatTransitionDuration = Number.parseFloat(transitionDuration);\n  const floatTransitionDelay = Number.parseFloat(transitionDelay); // Return 0 if element or transition duration is not found\n\n  if (!floatTransitionDuration && !floatTransitionDelay) {\n    return 0;\n  } // If multiple durations are defined, take the first\n\n\n  transitionDuration = transitionDuration.split(',')[0];\n  transitionDelay = transitionDelay.split(',')[0];\n  return (Number.parseFloat(transitionDuration) + Number.parseFloat(transitionDelay)) * MILLISECONDS_MULTIPLIER;\n};\n\nconst triggerTransitionEnd = element => {\n  element.dispatchEvent(new Event(TRANSITION_END));\n};\n\nconst isElement = obj => {\n  if (!obj || typeof obj !== 'object') {\n    return false;\n  }\n\n  if (typeof obj.jquery !== 'undefined') {\n    obj = obj[0];\n  }\n\n  return typeof obj.nodeType !== 'undefined';\n};\n\nconst getElement = obj => {\n  if (isElement(obj)) {\n    // it's a jQuery object or a node element\n    return obj.jquery ? obj[0] : obj;\n  }\n\n  if (typeof obj === 'string' && obj.length > 0) {\n    return document.querySelector(obj);\n  }\n\n  return null;\n};\n\nconst typeCheckConfig = (componentName, config, configTypes) => {\n  Object.keys(configTypes).forEach(property => {\n    const expectedTypes = configTypes[property];\n    const value = config[property];\n    const valueType = value && isElement(value) ? 'element' : toType(value);\n\n    if (!new RegExp(expectedTypes).test(valueType)) {\n      throw new TypeError(`${componentName.toUpperCase()}: Option \"${property}\" provided type \"${valueType}\" but expected type \"${expectedTypes}\".`);\n    }\n  });\n};\n\nconst isVisible = element => {\n  if (!isElement(element) || element.getClientRects().length === 0) {\n    return false;\n  }\n\n  return getComputedStyle(element).getPropertyValue('visibility') === 'visible';\n};\n\nconst isDisabled = element => {\n  if (!element || element.nodeType !== Node.ELEMENT_NODE) {\n    return true;\n  }\n\n  if (element.classList.contains('disabled')) {\n    return true;\n  }\n\n  if (typeof element.disabled !== 'undefined') {\n    return element.disabled;\n  }\n\n  return element.hasAttribute('disabled') && element.getAttribute('disabled') !== 'false';\n};\n\nconst findShadowRoot = element => {\n  if (!document.documentElement.attachShadow) {\n    return null;\n  } // Can find the shadow root otherwise it'll return the document\n\n\n  if (typeof element.getRootNode === 'function') {\n    const root = element.getRootNode();\n    return root instanceof ShadowRoot ? root : null;\n  }\n\n  if (element instanceof ShadowRoot) {\n    return element;\n  } // when we don't find a shadow root\n\n\n  if (!element.parentNode) {\n    return null;\n  }\n\n  return findShadowRoot(element.parentNode);\n};\n\nconst noop = () => {};\n/**\n * Trick to restart an element's animation\n *\n * @param {HTMLElement} element\n * @return void\n *\n * @see https://www.charistheo.io/blog/2021/02/restart-a-css-animation-with-javascript/#restarting-a-css-animation\n */\n\n\nconst reflow = element => {\n  // eslint-disable-next-line no-unused-expressions\n  element.offsetHeight;\n};\n\nconst getjQuery = () => {\n  const {\n    jQuery\n  } = window;\n\n  if (jQuery && !document.body.hasAttribute('data-bs-no-jquery')) {\n    return jQuery;\n  }\n\n  return null;\n};\n\nconst DOMContentLoadedCallbacks = [];\n\nconst onDOMContentLoaded = callback => {\n  if (document.readyState === 'loading') {\n    // add listener on the first call when the document is in loading state\n    if (!DOMContentLoadedCallbacks.length) {\n      document.addEventListener('DOMContentLoaded', () => {\n        DOMContentLoadedCallbacks.forEach(callback => callback());\n      });\n    }\n\n    DOMContentLoadedCallbacks.push(callback);\n  } else {\n    callback();\n  }\n};\n\nconst isRTL = () => document.documentElement.dir === 'rtl';\n\nconst defineJQueryPlugin = plugin => {\n  onDOMContentLoaded(() => {\n    const $ = getjQuery();\n    /* istanbul ignore if */\n\n    if ($) {\n      const name = plugin.NAME;\n      const JQUERY_NO_CONFLICT = $.fn[name];\n      $.fn[name] = plugin.jQueryInterface;\n      $.fn[name].Constructor = plugin;\n\n      $.fn[name].noConflict = () => {\n        $.fn[name] = JQUERY_NO_CONFLICT;\n        return plugin.jQueryInterface;\n      };\n    }\n  });\n};\n\nconst execute = callback => {\n  if (typeof callback === 'function') {\n    callback();\n  }\n};\n\nconst executeAfterTransition = (callback, transitionElement, waitForTransition = true) => {\n  if (!waitForTransition) {\n    execute(callback);\n    return;\n  }\n\n  const durationPadding = 5;\n  const emulatedDuration = getTransitionDurationFromElement(transitionElement) + durationPadding;\n  let called = false;\n\n  const handler = ({\n    target\n  }) => {\n    if (target !== transitionElement) {\n      return;\n    }\n\n    called = true;\n    transitionElement.removeEventListener(TRANSITION_END, handler);\n    execute(callback);\n  };\n\n  transitionElement.addEventListener(TRANSITION_END, handler);\n  setTimeout(() => {\n    if (!called) {\n      triggerTransitionEnd(transitionElement);\n    }\n  }, emulatedDuration);\n};\n/**\n * Return the previous/next element of a list.\n *\n * @param {array} list    The list of elements\n * @param activeElement   The active element\n * @param shouldGetNext   Choose to get next or previous element\n * @param isCycleAllowed\n * @return {Element|elem} The proper element\n */\n\n\nconst getNextActiveElement = (list, activeElement, shouldGetNext, isCycleAllowed) => {\n  let index = list.indexOf(activeElement); // if the element does not exist in the list return an element depending on the direction and if cycle is allowed\n\n  if (index === -1) {\n    return list[!shouldGetNext && isCycleAllowed ? list.length - 1 : 0];\n  }\n\n  const listLength = list.length;\n  index += shouldGetNext ? 1 : -1;\n\n  if (isCycleAllowed) {\n    index = (index + listLength) % listLength;\n  }\n\n  return list[Math.max(0, Math.min(index, listLength - 1))];\n};\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): dom/event-handler.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst namespaceRegex = /[^.]*(?=\\..*)\\.|.*/;\nconst stripNameRegex = /\\..*/;\nconst stripUidRegex = /::\\d+$/;\nconst eventRegistry = {}; // Events storage\n\nlet uidEvent = 1;\nconst customEvents = {\n  mouseenter: 'mouseover',\n  mouseleave: 'mouseout'\n};\nconst customEventsRegex = /^(mouseenter|mouseleave)/i;\nconst nativeEvents = new Set(['click', 'dblclick', 'mouseup', 'mousedown', 'contextmenu', 'mousewheel', 'DOMMouseScroll', 'mouseover', 'mouseout', 'mousemove', 'selectstart', 'selectend', 'keydown', 'keypress', 'keyup', 'orientationchange', 'touchstart', 'touchmove', 'touchend', 'touchcancel', 'pointerdown', 'pointermove', 'pointerup', 'pointerleave', 'pointercancel', 'gesturestart', 'gesturechange', 'gestureend', 'focus', 'blur', 'change', 'reset', 'select', 'submit', 'focusin', 'focusout', 'load', 'unload', 'beforeunload', 'resize', 'move', 'DOMContentLoaded', 'readystatechange', 'error', 'abort', 'scroll']);\n/**\n * ------------------------------------------------------------------------\n * Private methods\n * ------------------------------------------------------------------------\n */\n\nfunction getUidEvent(element, uid) {\n  return uid && `${uid}::${uidEvent++}` || element.uidEvent || uidEvent++;\n}\n\nfunction getEvent(element) {\n  const uid = getUidEvent(element);\n  element.uidEvent = uid;\n  eventRegistry[uid] = eventRegistry[uid] || {};\n  return eventRegistry[uid];\n}\n\nfunction bootstrapHandler(element, fn) {\n  return function handler(event) {\n    event.delegateTarget = element;\n\n    if (handler.oneOff) {\n      EventHandler.off(element, event.type, fn);\n    }\n\n    return fn.apply(element, [event]);\n  };\n}\n\nfunction bootstrapDelegationHandler(element, selector, fn) {\n  return function handler(event) {\n    const domElements = element.querySelectorAll(selector);\n\n    for (let {\n      target\n    } = event; target && target !== this; target = target.parentNode) {\n      for (let i = domElements.length; i--;) {\n        if (domElements[i] === target) {\n          event.delegateTarget = target;\n\n          if (handler.oneOff) {\n            EventHandler.off(element, event.type, selector, fn);\n          }\n\n          return fn.apply(target, [event]);\n        }\n      }\n    } // To please ESLint\n\n\n    return null;\n  };\n}\n\nfunction findHandler(events, handler, delegationSelector = null) {\n  const uidEventList = Object.keys(events);\n\n  for (let i = 0, len = uidEventList.length; i < len; i++) {\n    const event = events[uidEventList[i]];\n\n    if (event.originalHandler === handler && event.delegationSelector === delegationSelector) {\n      return event;\n    }\n  }\n\n  return null;\n}\n\nfunction normalizeParams(originalTypeEvent, handler, delegationFn) {\n  const delegation = typeof handler === 'string';\n  const originalHandler = delegation ? delegationFn : handler;\n  let typeEvent = getTypeEvent(originalTypeEvent);\n  const isNative = nativeEvents.has(typeEvent);\n\n  if (!isNative) {\n    typeEvent = originalTypeEvent;\n  }\n\n  return [delegation, originalHandler, typeEvent];\n}\n\nfunction addHandler(element, originalTypeEvent, handler, delegationFn, oneOff) {\n  if (typeof originalTypeEvent !== 'string' || !element) {\n    return;\n  }\n\n  if (!handler) {\n    handler = delegationFn;\n    delegationFn = null;\n  } // in case of mouseenter or mouseleave wrap the handler within a function that checks for its DOM position\n  // this prevents the handler from being dispatched the same way as mouseover or mouseout does\n\n\n  if (customEventsRegex.test(originalTypeEvent)) {\n    const wrapFn = fn => {\n      return function (event) {\n        if (!event.relatedTarget || event.relatedTarget !== event.delegateTarget && !event.delegateTarget.contains(event.relatedTarget)) {\n          return fn.call(this, event);\n        }\n      };\n    };\n\n    if (delegationFn) {\n      delegationFn = wrapFn(delegationFn);\n    } else {\n      handler = wrapFn(handler);\n    }\n  }\n\n  const [delegation, originalHandler, typeEvent] = normalizeParams(originalTypeEvent, handler, delegationFn);\n  const events = getEvent(element);\n  const handlers = events[typeEvent] || (events[typeEvent] = {});\n  const previousFn = findHandler(handlers, originalHandler, delegation ? handler : null);\n\n  if (previousFn) {\n    previousFn.oneOff = previousFn.oneOff && oneOff;\n    return;\n  }\n\n  const uid = getUidEvent(originalHandler, originalTypeEvent.replace(namespaceRegex, ''));\n  const fn = delegation ? bootstrapDelegationHandler(element, handler, delegationFn) : bootstrapHandler(element, handler);\n  fn.delegationSelector = delegation ? handler : null;\n  fn.originalHandler = originalHandler;\n  fn.oneOff = oneOff;\n  fn.uidEvent = uid;\n  handlers[uid] = fn;\n  element.addEventListener(typeEvent, fn, delegation);\n}\n\nfunction removeHandler(element, events, typeEvent, handler, delegationSelector) {\n  const fn = findHandler(events[typeEvent], handler, delegationSelector);\n\n  if (!fn) {\n    return;\n  }\n\n  element.removeEventListener(typeEvent, fn, Boolean(delegationSelector));\n  delete events[typeEvent][fn.uidEvent];\n}\n\nfunction removeNamespacedHandlers(element, events, typeEvent, namespace) {\n  const storeElementEvent = events[typeEvent] || {};\n  Object.keys(storeElementEvent).forEach(handlerKey => {\n    if (handlerKey.includes(namespace)) {\n      const event = storeElementEvent[handlerKey];\n      removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector);\n    }\n  });\n}\n\nfunction getTypeEvent(event) {\n  // allow to get the native events from namespaced events ('click.bs.button' --> 'click')\n  event = event.replace(stripNameRegex, '');\n  return customEvents[event] || event;\n}\n\nconst EventHandler = {\n  on(element, event, handler, delegationFn) {\n    addHandler(element, event, handler, delegationFn, false);\n  },\n\n  one(element, event, handler, delegationFn) {\n    addHandler(element, event, handler, delegationFn, true);\n  },\n\n  off(element, originalTypeEvent, handler, delegationFn) {\n    if (typeof originalTypeEvent !== 'string' || !element) {\n      return;\n    }\n\n    const [delegation, originalHandler, typeEvent] = normalizeParams(originalTypeEvent, handler, delegationFn);\n    const inNamespace = typeEvent !== originalTypeEvent;\n    const events = getEvent(element);\n    const isNamespace = originalTypeEvent.startsWith('.');\n\n    if (typeof originalHandler !== 'undefined') {\n      // Simplest case: handler is passed, remove that listener ONLY.\n      if (!events || !events[typeEvent]) {\n        return;\n      }\n\n      removeHandler(element, events, typeEvent, originalHandler, delegation ? handler : null);\n      return;\n    }\n\n    if (isNamespace) {\n      Object.keys(events).forEach(elementEvent => {\n        removeNamespacedHandlers(element, events, elementEvent, originalTypeEvent.slice(1));\n      });\n    }\n\n    const storeElementEvent = events[typeEvent] || {};\n    Object.keys(storeElementEvent).forEach(keyHandlers => {\n      const handlerKey = keyHandlers.replace(stripUidRegex, '');\n\n      if (!inNamespace || originalTypeEvent.includes(handlerKey)) {\n        const event = storeElementEvent[keyHandlers];\n        removeHandler(element, events, typeEvent, event.originalHandler, event.delegationSelector);\n      }\n    });\n  },\n\n  trigger(element, event, args) {\n    if (typeof event !== 'string' || !element) {\n      return null;\n    }\n\n    const $ = getjQuery();\n    const typeEvent = getTypeEvent(event);\n    const inNamespace = event !== typeEvent;\n    const isNative = nativeEvents.has(typeEvent);\n    let jQueryEvent;\n    let bubbles = true;\n    let nativeDispatch = true;\n    let defaultPrevented = false;\n    let evt = null;\n\n    if (inNamespace && $) {\n      jQueryEvent = $.Event(event, args);\n      $(element).trigger(jQueryEvent);\n      bubbles = !jQueryEvent.isPropagationStopped();\n      nativeDispatch = !jQueryEvent.isImmediatePropagationStopped();\n      defaultPrevented = jQueryEvent.isDefaultPrevented();\n    }\n\n    if (isNative) {\n      evt = document.createEvent('HTMLEvents');\n      evt.initEvent(typeEvent, bubbles, true);\n    } else {\n      evt = new CustomEvent(event, {\n        bubbles,\n        cancelable: true\n      });\n    } // merge custom information in our event\n\n\n    if (typeof args !== 'undefined') {\n      Object.keys(args).forEach(key => {\n        Object.defineProperty(evt, key, {\n          get() {\n            return args[key];\n          }\n\n        });\n      });\n    }\n\n    if (defaultPrevented) {\n      evt.preventDefault();\n    }\n\n    if (nativeDispatch) {\n      element.dispatchEvent(evt);\n    }\n\n    if (evt.defaultPrevented && typeof jQueryEvent !== 'undefined') {\n      jQueryEvent.preventDefault();\n    }\n\n    return evt;\n  }\n\n};\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): dom/data.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\nconst elementMap = new Map();\nconst Data = {\n  set(element, key, instance) {\n    if (!elementMap.has(element)) {\n      elementMap.set(element, new Map());\n    }\n\n    const instanceMap = elementMap.get(element); // make it clear we only want one instance per element\n    // can be removed later when multiple key/instances are fine to be used\n\n    if (!instanceMap.has(key) && instanceMap.size !== 0) {\n      // eslint-disable-next-line no-console\n      console.error(`Bootstrap doesn't allow more than one instance per element. Bound instance: ${Array.from(instanceMap.keys())[0]}.`);\n      return;\n    }\n\n    instanceMap.set(key, instance);\n  },\n\n  get(element, key) {\n    if (elementMap.has(element)) {\n      return elementMap.get(element).get(key) || null;\n    }\n\n    return null;\n  },\n\n  remove(element, key) {\n    if (!elementMap.has(element)) {\n      return;\n    }\n\n    const instanceMap = elementMap.get(element);\n    instanceMap.delete(key); // free up element references if there are no instances left for an element\n\n    if (instanceMap.size === 0) {\n      elementMap.delete(element);\n    }\n  }\n\n};\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): base-component.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst VERSION = '5.1.3';\n\nclass BaseComponent {\n  constructor(element) {\n    element = getElement(element);\n\n    if (!element) {\n      return;\n    }\n\n    this._element = element;\n    Data.set(this._element, this.constructor.DATA_KEY, this);\n  }\n\n  dispose() {\n    Data.remove(this._element, this.constructor.DATA_KEY);\n    EventHandler.off(this._element, this.constructor.EVENT_KEY);\n    Object.getOwnPropertyNames(this).forEach(propertyName => {\n      this[propertyName] = null;\n    });\n  }\n\n  _queueCallback(callback, element, isAnimated = true) {\n    executeAfterTransition(callback, element, isAnimated);\n  }\n  /** Static */\n\n\n  static getInstance(element) {\n    return Data.get(getElement(element), this.DATA_KEY);\n  }\n\n  static getOrCreateInstance(element, config = {}) {\n    return this.getInstance(element) || new this(element, typeof config === 'object' ? config : null);\n  }\n\n  static get VERSION() {\n    return VERSION;\n  }\n\n  static get NAME() {\n    throw new Error('You have to implement the static method \"NAME\", for each component!');\n  }\n\n  static get DATA_KEY() {\n    return `bs.${this.NAME}`;\n  }\n\n  static get EVENT_KEY() {\n    return `.${this.DATA_KEY}`;\n  }\n\n}\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): util/component-functions.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n\nconst enableDismissTrigger = (component, method = 'hide') => {\n  const clickEvent = `click.dismiss${component.EVENT_KEY}`;\n  const name = component.NAME;\n  EventHandler.on(document, clickEvent, `[data-bs-dismiss=\"${name}\"]`, function (event) {\n    if (['A', 'AREA'].includes(this.tagName)) {\n      event.preventDefault();\n    }\n\n    if (isDisabled(this)) {\n      return;\n    }\n\n    const target = getElementFromSelector(this) || this.closest(`.${name}`);\n    const instance = component.getOrCreateInstance(target); // Method argument is left, for Alert and only, as it doesn't implement the 'hide' method\n\n    instance[method]();\n  });\n};\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): alert.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$d = 'alert';\nconst DATA_KEY$c = 'bs.alert';\nconst EVENT_KEY$c = `.${DATA_KEY$c}`;\nconst EVENT_CLOSE = `close${EVENT_KEY$c}`;\nconst EVENT_CLOSED = `closed${EVENT_KEY$c}`;\nconst CLASS_NAME_FADE$5 = 'fade';\nconst CLASS_NAME_SHOW$8 = 'show';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Alert extends BaseComponent {\n  // Getters\n  static get NAME() {\n    return NAME$d;\n  } // Public\n\n\n  close() {\n    const closeEvent = EventHandler.trigger(this._element, EVENT_CLOSE);\n\n    if (closeEvent.defaultPrevented) {\n      return;\n    }\n\n    this._element.classList.remove(CLASS_NAME_SHOW$8);\n\n    const isAnimated = this._element.classList.contains(CLASS_NAME_FADE$5);\n\n    this._queueCallback(() => this._destroyElement(), this._element, isAnimated);\n  } // Private\n\n\n  _destroyElement() {\n    this._element.remove();\n\n    EventHandler.trigger(this._element, EVENT_CLOSED);\n    this.dispose();\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Alert.getOrCreateInstance(this);\n\n      if (typeof config !== 'string') {\n        return;\n      }\n\n      if (data[config] === undefined || config.startsWith('_') || config === 'constructor') {\n        throw new TypeError(`No method named \"${config}\"`);\n      }\n\n      data[config](this);\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nenableDismissTrigger(Alert, 'close');\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Alert to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Alert);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): button.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$c = 'button';\nconst DATA_KEY$b = 'bs.button';\nconst EVENT_KEY$b = `.${DATA_KEY$b}`;\nconst DATA_API_KEY$7 = '.data-api';\nconst CLASS_NAME_ACTIVE$3 = 'active';\nconst SELECTOR_DATA_TOGGLE$5 = '[data-bs-toggle=\"button\"]';\nconst EVENT_CLICK_DATA_API$6 = `click${EVENT_KEY$b}${DATA_API_KEY$7}`;\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Button extends BaseComponent {\n  // Getters\n  static get NAME() {\n    return NAME$c;\n  } // Public\n\n\n  toggle() {\n    // Toggle class and sync the `aria-pressed` attribute with the return value of the `.toggle()` method\n    this._element.setAttribute('aria-pressed', this._element.classList.toggle(CLASS_NAME_ACTIVE$3));\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Button.getOrCreateInstance(this);\n\n      if (config === 'toggle') {\n        data[config]();\n      }\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_CLICK_DATA_API$6, SELECTOR_DATA_TOGGLE$5, event => {\n  event.preventDefault();\n  const button = event.target.closest(SELECTOR_DATA_TOGGLE$5);\n  const data = Button.getOrCreateInstance(button);\n  data.toggle();\n});\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Button to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Button);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): dom/manipulator.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nfunction normalizeData(val) {\n  if (val === 'true') {\n    return true;\n  }\n\n  if (val === 'false') {\n    return false;\n  }\n\n  if (val === Number(val).toString()) {\n    return Number(val);\n  }\n\n  if (val === '' || val === 'null') {\n    return null;\n  }\n\n  return val;\n}\n\nfunction normalizeDataKey(key) {\n  return key.replace(/[A-Z]/g, chr => `-${chr.toLowerCase()}`);\n}\n\nconst Manipulator = {\n  setDataAttribute(element, key, value) {\n    element.setAttribute(`data-bs-${normalizeDataKey(key)}`, value);\n  },\n\n  removeDataAttribute(element, key) {\n    element.removeAttribute(`data-bs-${normalizeDataKey(key)}`);\n  },\n\n  getDataAttributes(element) {\n    if (!element) {\n      return {};\n    }\n\n    const attributes = {};\n    Object.keys(element.dataset).filter(key => key.startsWith('bs')).forEach(key => {\n      let pureKey = key.replace(/^bs/, '');\n      pureKey = pureKey.charAt(0).toLowerCase() + pureKey.slice(1, pureKey.length);\n      attributes[pureKey] = normalizeData(element.dataset[key]);\n    });\n    return attributes;\n  },\n\n  getDataAttribute(element, key) {\n    return normalizeData(element.getAttribute(`data-bs-${normalizeDataKey(key)}`));\n  },\n\n  offset(element) {\n    const rect = element.getBoundingClientRect();\n    return {\n      top: rect.top + window.pageYOffset,\n      left: rect.left + window.pageXOffset\n    };\n  },\n\n  position(element) {\n    return {\n      top: element.offsetTop,\n      left: element.offsetLeft\n    };\n  }\n\n};\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): dom/selector-engine.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nconst NODE_TEXT = 3;\nconst SelectorEngine = {\n  find(selector, element = document.documentElement) {\n    return [].concat(...Element.prototype.querySelectorAll.call(element, selector));\n  },\n\n  findOne(selector, element = document.documentElement) {\n    return Element.prototype.querySelector.call(element, selector);\n  },\n\n  children(element, selector) {\n    return [].concat(...element.children).filter(child => child.matches(selector));\n  },\n\n  parents(element, selector) {\n    const parents = [];\n    let ancestor = element.parentNode;\n\n    while (ancestor && ancestor.nodeType === Node.ELEMENT_NODE && ancestor.nodeType !== NODE_TEXT) {\n      if (ancestor.matches(selector)) {\n        parents.push(ancestor);\n      }\n\n      ancestor = ancestor.parentNode;\n    }\n\n    return parents;\n  },\n\n  prev(element, selector) {\n    let previous = element.previousElementSibling;\n\n    while (previous) {\n      if (previous.matches(selector)) {\n        return [previous];\n      }\n\n      previous = previous.previousElementSibling;\n    }\n\n    return [];\n  },\n\n  next(element, selector) {\n    let next = element.nextElementSibling;\n\n    while (next) {\n      if (next.matches(selector)) {\n        return [next];\n      }\n\n      next = next.nextElementSibling;\n    }\n\n    return [];\n  },\n\n  focusableChildren(element) {\n    const focusables = ['a', 'button', 'input', 'textarea', 'select', 'details', '[tabindex]', '[contenteditable=\"true\"]'].map(selector => `${selector}:not([tabindex^=\"-\"])`).join(', ');\n    return this.find(focusables, element).filter(el => !isDisabled(el) && isVisible(el));\n  }\n\n};\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): carousel.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$b = 'carousel';\nconst DATA_KEY$a = 'bs.carousel';\nconst EVENT_KEY$a = `.${DATA_KEY$a}`;\nconst DATA_API_KEY$6 = '.data-api';\nconst ARROW_LEFT_KEY = 'ArrowLeft';\nconst ARROW_RIGHT_KEY = 'ArrowRight';\nconst TOUCHEVENT_COMPAT_WAIT = 500; // Time for mouse compat events to fire after touch\n\nconst SWIPE_THRESHOLD = 40;\nconst Default$a = {\n  interval: 5000,\n  keyboard: true,\n  slide: false,\n  pause: 'hover',\n  wrap: true,\n  touch: true\n};\nconst DefaultType$a = {\n  interval: '(number|boolean)',\n  keyboard: 'boolean',\n  slide: '(boolean|string)',\n  pause: '(string|boolean)',\n  wrap: 'boolean',\n  touch: 'boolean'\n};\nconst ORDER_NEXT = 'next';\nconst ORDER_PREV = 'prev';\nconst DIRECTION_LEFT = 'left';\nconst DIRECTION_RIGHT = 'right';\nconst KEY_TO_DIRECTION = {\n  [ARROW_LEFT_KEY]: DIRECTION_RIGHT,\n  [ARROW_RIGHT_KEY]: DIRECTION_LEFT\n};\nconst EVENT_SLIDE = `slide${EVENT_KEY$a}`;\nconst EVENT_SLID = `slid${EVENT_KEY$a}`;\nconst EVENT_KEYDOWN = `keydown${EVENT_KEY$a}`;\nconst EVENT_MOUSEENTER = `mouseenter${EVENT_KEY$a}`;\nconst EVENT_MOUSELEAVE = `mouseleave${EVENT_KEY$a}`;\nconst EVENT_TOUCHSTART = `touchstart${EVENT_KEY$a}`;\nconst EVENT_TOUCHMOVE = `touchmove${EVENT_KEY$a}`;\nconst EVENT_TOUCHEND = `touchend${EVENT_KEY$a}`;\nconst EVENT_POINTERDOWN = `pointerdown${EVENT_KEY$a}`;\nconst EVENT_POINTERUP = `pointerup${EVENT_KEY$a}`;\nconst EVENT_DRAG_START = `dragstart${EVENT_KEY$a}`;\nconst EVENT_LOAD_DATA_API$2 = `load${EVENT_KEY$a}${DATA_API_KEY$6}`;\nconst EVENT_CLICK_DATA_API$5 = `click${EVENT_KEY$a}${DATA_API_KEY$6}`;\nconst CLASS_NAME_CAROUSEL = 'carousel';\nconst CLASS_NAME_ACTIVE$2 = 'active';\nconst CLASS_NAME_SLIDE = 'slide';\nconst CLASS_NAME_END = 'carousel-item-end';\nconst CLASS_NAME_START = 'carousel-item-start';\nconst CLASS_NAME_NEXT = 'carousel-item-next';\nconst CLASS_NAME_PREV = 'carousel-item-prev';\nconst CLASS_NAME_POINTER_EVENT = 'pointer-event';\nconst SELECTOR_ACTIVE$1 = '.active';\nconst SELECTOR_ACTIVE_ITEM = '.active.carousel-item';\nconst SELECTOR_ITEM = '.carousel-item';\nconst SELECTOR_ITEM_IMG = '.carousel-item img';\nconst SELECTOR_NEXT_PREV = '.carousel-item-next, .carousel-item-prev';\nconst SELECTOR_INDICATORS = '.carousel-indicators';\nconst SELECTOR_INDICATOR = '[data-bs-target]';\nconst SELECTOR_DATA_SLIDE = '[data-bs-slide], [data-bs-slide-to]';\nconst SELECTOR_DATA_RIDE = '[data-bs-ride=\"carousel\"]';\nconst POINTER_TYPE_TOUCH = 'touch';\nconst POINTER_TYPE_PEN = 'pen';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Carousel extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._items = null;\n    this._interval = null;\n    this._activeElement = null;\n    this._isPaused = false;\n    this._isSliding = false;\n    this.touchTimeout = null;\n    this.touchStartX = 0;\n    this.touchDeltaX = 0;\n    this._config = this._getConfig(config);\n    this._indicatorsElement = SelectorEngine.findOne(SELECTOR_INDICATORS, this._element);\n    this._touchSupported = 'ontouchstart' in document.documentElement || navigator.maxTouchPoints > 0;\n    this._pointerEvent = Boolean(window.PointerEvent);\n\n    this._addEventListeners();\n  } // Getters\n\n\n  static get Default() {\n    return Default$a;\n  }\n\n  static get NAME() {\n    return NAME$b;\n  } // Public\n\n\n  next() {\n    this._slide(ORDER_NEXT);\n  }\n\n  nextWhenVisible() {\n    // Don't call next when the page isn't visible\n    // or the carousel or its parent isn't visible\n    if (!document.hidden && isVisible(this._element)) {\n      this.next();\n    }\n  }\n\n  prev() {\n    this._slide(ORDER_PREV);\n  }\n\n  pause(event) {\n    if (!event) {\n      this._isPaused = true;\n    }\n\n    if (SelectorEngine.findOne(SELECTOR_NEXT_PREV, this._element)) {\n      triggerTransitionEnd(this._element);\n      this.cycle(true);\n    }\n\n    clearInterval(this._interval);\n    this._interval = null;\n  }\n\n  cycle(event) {\n    if (!event) {\n      this._isPaused = false;\n    }\n\n    if (this._interval) {\n      clearInterval(this._interval);\n      this._interval = null;\n    }\n\n    if (this._config && this._config.interval && !this._isPaused) {\n      this._updateInterval();\n\n      this._interval = setInterval((document.visibilityState ? this.nextWhenVisible : this.next).bind(this), this._config.interval);\n    }\n  }\n\n  to(index) {\n    this._activeElement = SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);\n\n    const activeIndex = this._getItemIndex(this._activeElement);\n\n    if (index > this._items.length - 1 || index < 0) {\n      return;\n    }\n\n    if (this._isSliding) {\n      EventHandler.one(this._element, EVENT_SLID, () => this.to(index));\n      return;\n    }\n\n    if (activeIndex === index) {\n      this.pause();\n      this.cycle();\n      return;\n    }\n\n    const order = index > activeIndex ? ORDER_NEXT : ORDER_PREV;\n\n    this._slide(order, this._items[index]);\n  } // Private\n\n\n  _getConfig(config) {\n    config = { ...Default$a,\n      ...Manipulator.getDataAttributes(this._element),\n      ...(typeof config === 'object' ? config : {})\n    };\n    typeCheckConfig(NAME$b, config, DefaultType$a);\n    return config;\n  }\n\n  _handleSwipe() {\n    const absDeltax = Math.abs(this.touchDeltaX);\n\n    if (absDeltax <= SWIPE_THRESHOLD) {\n      return;\n    }\n\n    const direction = absDeltax / this.touchDeltaX;\n    this.touchDeltaX = 0;\n\n    if (!direction) {\n      return;\n    }\n\n    this._slide(direction > 0 ? DIRECTION_RIGHT : DIRECTION_LEFT);\n  }\n\n  _addEventListeners() {\n    if (this._config.keyboard) {\n      EventHandler.on(this._element, EVENT_KEYDOWN, event => this._keydown(event));\n    }\n\n    if (this._config.pause === 'hover') {\n      EventHandler.on(this._element, EVENT_MOUSEENTER, event => this.pause(event));\n      EventHandler.on(this._element, EVENT_MOUSELEAVE, event => this.cycle(event));\n    }\n\n    if (this._config.touch && this._touchSupported) {\n      this._addTouchEventListeners();\n    }\n  }\n\n  _addTouchEventListeners() {\n    const hasPointerPenTouch = event => {\n      return this._pointerEvent && (event.pointerType === POINTER_TYPE_PEN || event.pointerType === POINTER_TYPE_TOUCH);\n    };\n\n    const start = event => {\n      if (hasPointerPenTouch(event)) {\n        this.touchStartX = event.clientX;\n      } else if (!this._pointerEvent) {\n        this.touchStartX = event.touches[0].clientX;\n      }\n    };\n\n    const move = event => {\n      // ensure swiping with one touch and not pinching\n      this.touchDeltaX = event.touches && event.touches.length > 1 ? 0 : event.touches[0].clientX - this.touchStartX;\n    };\n\n    const end = event => {\n      if (hasPointerPenTouch(event)) {\n        this.touchDeltaX = event.clientX - this.touchStartX;\n      }\n\n      this._handleSwipe();\n\n      if (this._config.pause === 'hover') {\n        // If it's a touch-enabled device, mouseenter/leave are fired as\n        // part of the mouse compatibility events on first tap - the carousel\n        // would stop cycling until user tapped out of it;\n        // here, we listen for touchend, explicitly pause the carousel\n        // (as if it's the second time we tap on it, mouseenter compat event\n        // is NOT fired) and after a timeout (to allow for mouse compatibility\n        // events to fire) we explicitly restart cycling\n        this.pause();\n\n        if (this.touchTimeout) {\n          clearTimeout(this.touchTimeout);\n        }\n\n        this.touchTimeout = setTimeout(event => this.cycle(event), TOUCHEVENT_COMPAT_WAIT + this._config.interval);\n      }\n    };\n\n    SelectorEngine.find(SELECTOR_ITEM_IMG, this._element).forEach(itemImg => {\n      EventHandler.on(itemImg, EVENT_DRAG_START, event => event.preventDefault());\n    });\n\n    if (this._pointerEvent) {\n      EventHandler.on(this._element, EVENT_POINTERDOWN, event => start(event));\n      EventHandler.on(this._element, EVENT_POINTERUP, event => end(event));\n\n      this._element.classList.add(CLASS_NAME_POINTER_EVENT);\n    } else {\n      EventHandler.on(this._element, EVENT_TOUCHSTART, event => start(event));\n      EventHandler.on(this._element, EVENT_TOUCHMOVE, event => move(event));\n      EventHandler.on(this._element, EVENT_TOUCHEND, event => end(event));\n    }\n  }\n\n  _keydown(event) {\n    if (/input|textarea/i.test(event.target.tagName)) {\n      return;\n    }\n\n    const direction = KEY_TO_DIRECTION[event.key];\n\n    if (direction) {\n      event.preventDefault();\n\n      this._slide(direction);\n    }\n  }\n\n  _getItemIndex(element) {\n    this._items = element && element.parentNode ? SelectorEngine.find(SELECTOR_ITEM, element.parentNode) : [];\n    return this._items.indexOf(element);\n  }\n\n  _getItemByOrder(order, activeElement) {\n    const isNext = order === ORDER_NEXT;\n    return getNextActiveElement(this._items, activeElement, isNext, this._config.wrap);\n  }\n\n  _triggerSlideEvent(relatedTarget, eventDirectionName) {\n    const targetIndex = this._getItemIndex(relatedTarget);\n\n    const fromIndex = this._getItemIndex(SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element));\n\n    return EventHandler.trigger(this._element, EVENT_SLIDE, {\n      relatedTarget,\n      direction: eventDirectionName,\n      from: fromIndex,\n      to: targetIndex\n    });\n  }\n\n  _setActiveIndicatorElement(element) {\n    if (this._indicatorsElement) {\n      const activeIndicator = SelectorEngine.findOne(SELECTOR_ACTIVE$1, this._indicatorsElement);\n      activeIndicator.classList.remove(CLASS_NAME_ACTIVE$2);\n      activeIndicator.removeAttribute('aria-current');\n      const indicators = SelectorEngine.find(SELECTOR_INDICATOR, this._indicatorsElement);\n\n      for (let i = 0; i < indicators.length; i++) {\n        if (Number.parseInt(indicators[i].getAttribute('data-bs-slide-to'), 10) === this._getItemIndex(element)) {\n          indicators[i].classList.add(CLASS_NAME_ACTIVE$2);\n          indicators[i].setAttribute('aria-current', 'true');\n          break;\n        }\n      }\n    }\n  }\n\n  _updateInterval() {\n    const element = this._activeElement || SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);\n\n    if (!element) {\n      return;\n    }\n\n    const elementInterval = Number.parseInt(element.getAttribute('data-bs-interval'), 10);\n\n    if (elementInterval) {\n      this._config.defaultInterval = this._config.defaultInterval || this._config.interval;\n      this._config.interval = elementInterval;\n    } else {\n      this._config.interval = this._config.defaultInterval || this._config.interval;\n    }\n  }\n\n  _slide(directionOrOrder, element) {\n    const order = this._directionToOrder(directionOrOrder);\n\n    const activeElement = SelectorEngine.findOne(SELECTOR_ACTIVE_ITEM, this._element);\n\n    const activeElementIndex = this._getItemIndex(activeElement);\n\n    const nextElement = element || this._getItemByOrder(order, activeElement);\n\n    const nextElementIndex = this._getItemIndex(nextElement);\n\n    const isCycling = Boolean(this._interval);\n    const isNext = order === ORDER_NEXT;\n    const directionalClassName = isNext ? CLASS_NAME_START : CLASS_NAME_END;\n    const orderClassName = isNext ? CLASS_NAME_NEXT : CLASS_NAME_PREV;\n\n    const eventDirectionName = this._orderToDirection(order);\n\n    if (nextElement && nextElement.classList.contains(CLASS_NAME_ACTIVE$2)) {\n      this._isSliding = false;\n      return;\n    }\n\n    if (this._isSliding) {\n      return;\n    }\n\n    const slideEvent = this._triggerSlideEvent(nextElement, eventDirectionName);\n\n    if (slideEvent.defaultPrevented) {\n      return;\n    }\n\n    if (!activeElement || !nextElement) {\n      // Some weirdness is happening, so we bail\n      return;\n    }\n\n    this._isSliding = true;\n\n    if (isCycling) {\n      this.pause();\n    }\n\n    this._setActiveIndicatorElement(nextElement);\n\n    this._activeElement = nextElement;\n\n    const triggerSlidEvent = () => {\n      EventHandler.trigger(this._element, EVENT_SLID, {\n        relatedTarget: nextElement,\n        direction: eventDirectionName,\n        from: activeElementIndex,\n        to: nextElementIndex\n      });\n    };\n\n    if (this._element.classList.contains(CLASS_NAME_SLIDE)) {\n      nextElement.classList.add(orderClassName);\n      reflow(nextElement);\n      activeElement.classList.add(directionalClassName);\n      nextElement.classList.add(directionalClassName);\n\n      const completeCallBack = () => {\n        nextElement.classList.remove(directionalClassName, orderClassName);\n        nextElement.classList.add(CLASS_NAME_ACTIVE$2);\n        activeElement.classList.remove(CLASS_NAME_ACTIVE$2, orderClassName, directionalClassName);\n        this._isSliding = false;\n        setTimeout(triggerSlidEvent, 0);\n      };\n\n      this._queueCallback(completeCallBack, activeElement, true);\n    } else {\n      activeElement.classList.remove(CLASS_NAME_ACTIVE$2);\n      nextElement.classList.add(CLASS_NAME_ACTIVE$2);\n      this._isSliding = false;\n      triggerSlidEvent();\n    }\n\n    if (isCycling) {\n      this.cycle();\n    }\n  }\n\n  _directionToOrder(direction) {\n    if (![DIRECTION_RIGHT, DIRECTION_LEFT].includes(direction)) {\n      return direction;\n    }\n\n    if (isRTL()) {\n      return direction === DIRECTION_LEFT ? ORDER_PREV : ORDER_NEXT;\n    }\n\n    return direction === DIRECTION_LEFT ? ORDER_NEXT : ORDER_PREV;\n  }\n\n  _orderToDirection(order) {\n    if (![ORDER_NEXT, ORDER_PREV].includes(order)) {\n      return order;\n    }\n\n    if (isRTL()) {\n      return order === ORDER_PREV ? DIRECTION_LEFT : DIRECTION_RIGHT;\n    }\n\n    return order === ORDER_PREV ? DIRECTION_RIGHT : DIRECTION_LEFT;\n  } // Static\n\n\n  static carouselInterface(element, config) {\n    const data = Carousel.getOrCreateInstance(element, config);\n    let {\n      _config\n    } = data;\n\n    if (typeof config === 'object') {\n      _config = { ..._config,\n        ...config\n      };\n    }\n\n    const action = typeof config === 'string' ? config : _config.slide;\n\n    if (typeof config === 'number') {\n      data.to(config);\n    } else if (typeof action === 'string') {\n      if (typeof data[action] === 'undefined') {\n        throw new TypeError(`No method named \"${action}\"`);\n      }\n\n      data[action]();\n    } else if (_config.interval && _config.ride) {\n      data.pause();\n      data.cycle();\n    }\n  }\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      Carousel.carouselInterface(this, config);\n    });\n  }\n\n  static dataApiClickHandler(event) {\n    const target = getElementFromSelector(this);\n\n    if (!target || !target.classList.contains(CLASS_NAME_CAROUSEL)) {\n      return;\n    }\n\n    const config = { ...Manipulator.getDataAttributes(target),\n      ...Manipulator.getDataAttributes(this)\n    };\n    const slideIndex = this.getAttribute('data-bs-slide-to');\n\n    if (slideIndex) {\n      config.interval = false;\n    }\n\n    Carousel.carouselInterface(target, config);\n\n    if (slideIndex) {\n      Carousel.getInstance(target).to(slideIndex);\n    }\n\n    event.preventDefault();\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_CLICK_DATA_API$5, SELECTOR_DATA_SLIDE, Carousel.dataApiClickHandler);\nEventHandler.on(window, EVENT_LOAD_DATA_API$2, () => {\n  const carousels = SelectorEngine.find(SELECTOR_DATA_RIDE);\n\n  for (let i = 0, len = carousels.length; i < len; i++) {\n    Carousel.carouselInterface(carousels[i], Carousel.getInstance(carousels[i]));\n  }\n});\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Carousel to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Carousel);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): collapse.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$a = 'collapse';\nconst DATA_KEY$9 = 'bs.collapse';\nconst EVENT_KEY$9 = `.${DATA_KEY$9}`;\nconst DATA_API_KEY$5 = '.data-api';\nconst Default$9 = {\n  toggle: true,\n  parent: null\n};\nconst DefaultType$9 = {\n  toggle: 'boolean',\n  parent: '(null|element)'\n};\nconst EVENT_SHOW$5 = `show${EVENT_KEY$9}`;\nconst EVENT_SHOWN$5 = `shown${EVENT_KEY$9}`;\nconst EVENT_HIDE$5 = `hide${EVENT_KEY$9}`;\nconst EVENT_HIDDEN$5 = `hidden${EVENT_KEY$9}`;\nconst EVENT_CLICK_DATA_API$4 = `click${EVENT_KEY$9}${DATA_API_KEY$5}`;\nconst CLASS_NAME_SHOW$7 = 'show';\nconst CLASS_NAME_COLLAPSE = 'collapse';\nconst CLASS_NAME_COLLAPSING = 'collapsing';\nconst CLASS_NAME_COLLAPSED = 'collapsed';\nconst CLASS_NAME_DEEPER_CHILDREN = `:scope .${CLASS_NAME_COLLAPSE} .${CLASS_NAME_COLLAPSE}`;\nconst CLASS_NAME_HORIZONTAL = 'collapse-horizontal';\nconst WIDTH = 'width';\nconst HEIGHT = 'height';\nconst SELECTOR_ACTIVES = '.collapse.show, .collapse.collapsing';\nconst SELECTOR_DATA_TOGGLE$4 = '[data-bs-toggle=\"collapse\"]';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Collapse extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._isTransitioning = false;\n    this._config = this._getConfig(config);\n    this._triggerArray = [];\n    const toggleList = SelectorEngine.find(SELECTOR_DATA_TOGGLE$4);\n\n    for (let i = 0, len = toggleList.length; i < len; i++) {\n      const elem = toggleList[i];\n      const selector = getSelectorFromElement(elem);\n      const filterElement = SelectorEngine.find(selector).filter(foundElem => foundElem === this._element);\n\n      if (selector !== null && filterElement.length) {\n        this._selector = selector;\n\n        this._triggerArray.push(elem);\n      }\n    }\n\n    this._initializeChildren();\n\n    if (!this._config.parent) {\n      this._addAriaAndCollapsedClass(this._triggerArray, this._isShown());\n    }\n\n    if (this._config.toggle) {\n      this.toggle();\n    }\n  } // Getters\n\n\n  static get Default() {\n    return Default$9;\n  }\n\n  static get NAME() {\n    return NAME$a;\n  } // Public\n\n\n  toggle() {\n    if (this._isShown()) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n\n  show() {\n    if (this._isTransitioning || this._isShown()) {\n      return;\n    }\n\n    let actives = [];\n    let activesData;\n\n    if (this._config.parent) {\n      const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent);\n      actives = SelectorEngine.find(SELECTOR_ACTIVES, this._config.parent).filter(elem => !children.includes(elem)); // remove children if greater depth\n    }\n\n    const container = SelectorEngine.findOne(this._selector);\n\n    if (actives.length) {\n      const tempActiveData = actives.find(elem => container !== elem);\n      activesData = tempActiveData ? Collapse.getInstance(tempActiveData) : null;\n\n      if (activesData && activesData._isTransitioning) {\n        return;\n      }\n    }\n\n    const startEvent = EventHandler.trigger(this._element, EVENT_SHOW$5);\n\n    if (startEvent.defaultPrevented) {\n      return;\n    }\n\n    actives.forEach(elemActive => {\n      if (container !== elemActive) {\n        Collapse.getOrCreateInstance(elemActive, {\n          toggle: false\n        }).hide();\n      }\n\n      if (!activesData) {\n        Data.set(elemActive, DATA_KEY$9, null);\n      }\n    });\n\n    const dimension = this._getDimension();\n\n    this._element.classList.remove(CLASS_NAME_COLLAPSE);\n\n    this._element.classList.add(CLASS_NAME_COLLAPSING);\n\n    this._element.style[dimension] = 0;\n\n    this._addAriaAndCollapsedClass(this._triggerArray, true);\n\n    this._isTransitioning = true;\n\n    const complete = () => {\n      this._isTransitioning = false;\n\n      this._element.classList.remove(CLASS_NAME_COLLAPSING);\n\n      this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW$7);\n\n      this._element.style[dimension] = '';\n      EventHandler.trigger(this._element, EVENT_SHOWN$5);\n    };\n\n    const capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1);\n    const scrollSize = `scroll${capitalizedDimension}`;\n\n    this._queueCallback(complete, this._element, true);\n\n    this._element.style[dimension] = `${this._element[scrollSize]}px`;\n  }\n\n  hide() {\n    if (this._isTransitioning || !this._isShown()) {\n      return;\n    }\n\n    const startEvent = EventHandler.trigger(this._element, EVENT_HIDE$5);\n\n    if (startEvent.defaultPrevented) {\n      return;\n    }\n\n    const dimension = this._getDimension();\n\n    this._element.style[dimension] = `${this._element.getBoundingClientRect()[dimension]}px`;\n    reflow(this._element);\n\n    this._element.classList.add(CLASS_NAME_COLLAPSING);\n\n    this._element.classList.remove(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW$7);\n\n    const triggerArrayLength = this._triggerArray.length;\n\n    for (let i = 0; i < triggerArrayLength; i++) {\n      const trigger = this._triggerArray[i];\n      const elem = getElementFromSelector(trigger);\n\n      if (elem && !this._isShown(elem)) {\n        this._addAriaAndCollapsedClass([trigger], false);\n      }\n    }\n\n    this._isTransitioning = true;\n\n    const complete = () => {\n      this._isTransitioning = false;\n\n      this._element.classList.remove(CLASS_NAME_COLLAPSING);\n\n      this._element.classList.add(CLASS_NAME_COLLAPSE);\n\n      EventHandler.trigger(this._element, EVENT_HIDDEN$5);\n    };\n\n    this._element.style[dimension] = '';\n\n    this._queueCallback(complete, this._element, true);\n  }\n\n  _isShown(element = this._element) {\n    return element.classList.contains(CLASS_NAME_SHOW$7);\n  } // Private\n\n\n  _getConfig(config) {\n    config = { ...Default$9,\n      ...Manipulator.getDataAttributes(this._element),\n      ...config\n    };\n    config.toggle = Boolean(config.toggle); // Coerce string values\n\n    config.parent = getElement(config.parent);\n    typeCheckConfig(NAME$a, config, DefaultType$9);\n    return config;\n  }\n\n  _getDimension() {\n    return this._element.classList.contains(CLASS_NAME_HORIZONTAL) ? WIDTH : HEIGHT;\n  }\n\n  _initializeChildren() {\n    if (!this._config.parent) {\n      return;\n    }\n\n    const children = SelectorEngine.find(CLASS_NAME_DEEPER_CHILDREN, this._config.parent);\n    SelectorEngine.find(SELECTOR_DATA_TOGGLE$4, this._config.parent).filter(elem => !children.includes(elem)).forEach(element => {\n      const selected = getElementFromSelector(element);\n\n      if (selected) {\n        this._addAriaAndCollapsedClass([element], this._isShown(selected));\n      }\n    });\n  }\n\n  _addAriaAndCollapsedClass(triggerArray, isOpen) {\n    if (!triggerArray.length) {\n      return;\n    }\n\n    triggerArray.forEach(elem => {\n      if (isOpen) {\n        elem.classList.remove(CLASS_NAME_COLLAPSED);\n      } else {\n        elem.classList.add(CLASS_NAME_COLLAPSED);\n      }\n\n      elem.setAttribute('aria-expanded', isOpen);\n    });\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const _config = {};\n\n      if (typeof config === 'string' && /show|hide/.test(config)) {\n        _config.toggle = false;\n      }\n\n      const data = Collapse.getOrCreateInstance(this, _config);\n\n      if (typeof config === 'string') {\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config]();\n      }\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_CLICK_DATA_API$4, SELECTOR_DATA_TOGGLE$4, function (event) {\n  // preventDefault only for <a> elements (which change the URL) not inside the collapsible element\n  if (event.target.tagName === 'A' || event.delegateTarget && event.delegateTarget.tagName === 'A') {\n    event.preventDefault();\n  }\n\n  const selector = getSelectorFromElement(this);\n  const selectorElements = SelectorEngine.find(selector);\n  selectorElements.forEach(element => {\n    Collapse.getOrCreateInstance(element, {\n      toggle: false\n    }).toggle();\n  });\n});\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Collapse to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Collapse);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): dropdown.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$9 = 'dropdown';\nconst DATA_KEY$8 = 'bs.dropdown';\nconst EVENT_KEY$8 = `.${DATA_KEY$8}`;\nconst DATA_API_KEY$4 = '.data-api';\nconst ESCAPE_KEY$2 = 'Escape';\nconst SPACE_KEY = 'Space';\nconst TAB_KEY$1 = 'Tab';\nconst ARROW_UP_KEY = 'ArrowUp';\nconst ARROW_DOWN_KEY = 'ArrowDown';\nconst RIGHT_MOUSE_BUTTON = 2; // MouseEvent.button value for the secondary button, usually the right button\n\nconst REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEY}|${ARROW_DOWN_KEY}|${ESCAPE_KEY$2}`);\nconst EVENT_HIDE$4 = `hide${EVENT_KEY$8}`;\nconst EVENT_HIDDEN$4 = `hidden${EVENT_KEY$8}`;\nconst EVENT_SHOW$4 = `show${EVENT_KEY$8}`;\nconst EVENT_SHOWN$4 = `shown${EVENT_KEY$8}`;\nconst EVENT_CLICK_DATA_API$3 = `click${EVENT_KEY$8}${DATA_API_KEY$4}`;\nconst EVENT_KEYDOWN_DATA_API = `keydown${EVENT_KEY$8}${DATA_API_KEY$4}`;\nconst EVENT_KEYUP_DATA_API = `keyup${EVENT_KEY$8}${DATA_API_KEY$4}`;\nconst CLASS_NAME_SHOW$6 = 'show';\nconst CLASS_NAME_DROPUP = 'dropup';\nconst CLASS_NAME_DROPEND = 'dropend';\nconst CLASS_NAME_DROPSTART = 'dropstart';\nconst CLASS_NAME_NAVBAR = 'navbar';\nconst SELECTOR_DATA_TOGGLE$3 = '[data-bs-toggle=\"dropdown\"]';\nconst SELECTOR_MENU = '.dropdown-menu';\nconst SELECTOR_NAVBAR_NAV = '.navbar-nav';\nconst SELECTOR_VISIBLE_ITEMS = '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)';\nconst PLACEMENT_TOP = isRTL() ? 'top-end' : 'top-start';\nconst PLACEMENT_TOPEND = isRTL() ? 'top-start' : 'top-end';\nconst PLACEMENT_BOTTOM = isRTL() ? 'bottom-end' : 'bottom-start';\nconst PLACEMENT_BOTTOMEND = isRTL() ? 'bottom-start' : 'bottom-end';\nconst PLACEMENT_RIGHT = isRTL() ? 'left-start' : 'right-start';\nconst PLACEMENT_LEFT = isRTL() ? 'right-start' : 'left-start';\nconst Default$8 = {\n  offset: [0, 2],\n  boundary: 'clippingParents',\n  reference: 'toggle',\n  display: 'dynamic',\n  popperConfig: null,\n  autoClose: true\n};\nconst DefaultType$8 = {\n  offset: '(array|string|function)',\n  boundary: '(string|element)',\n  reference: '(string|element|object)',\n  display: 'string',\n  popperConfig: '(null|object|function)',\n  autoClose: '(boolean|string)'\n};\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Dropdown extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._popper = null;\n    this._config = this._getConfig(config);\n    this._menu = this._getMenuElement();\n    this._inNavbar = this._detectNavbar();\n  } // Getters\n\n\n  static get Default() {\n    return Default$8;\n  }\n\n  static get DefaultType() {\n    return DefaultType$8;\n  }\n\n  static get NAME() {\n    return NAME$9;\n  } // Public\n\n\n  toggle() {\n    return this._isShown() ? this.hide() : this.show();\n  }\n\n  show() {\n    if (isDisabled(this._element) || this._isShown(this._menu)) {\n      return;\n    }\n\n    const relatedTarget = {\n      relatedTarget: this._element\n    };\n    const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$4, relatedTarget);\n\n    if (showEvent.defaultPrevented) {\n      return;\n    }\n\n    const parent = Dropdown.getParentFromElement(this._element); // Totally disable Popper for Dropdowns in Navbar\n\n    if (this._inNavbar) {\n      Manipulator.setDataAttribute(this._menu, 'popper', 'none');\n    } else {\n      this._createPopper(parent);\n    } // If this is a touch-enabled device we add extra\n    // empty mouseover listeners to the body's immediate children;\n    // only needed because of broken event delegation on iOS\n    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n\n\n    if ('ontouchstart' in document.documentElement && !parent.closest(SELECTOR_NAVBAR_NAV)) {\n      [].concat(...document.body.children).forEach(elem => EventHandler.on(elem, 'mouseover', noop));\n    }\n\n    this._element.focus();\n\n    this._element.setAttribute('aria-expanded', true);\n\n    this._menu.classList.add(CLASS_NAME_SHOW$6);\n\n    this._element.classList.add(CLASS_NAME_SHOW$6);\n\n    EventHandler.trigger(this._element, EVENT_SHOWN$4, relatedTarget);\n  }\n\n  hide() {\n    if (isDisabled(this._element) || !this._isShown(this._menu)) {\n      return;\n    }\n\n    const relatedTarget = {\n      relatedTarget: this._element\n    };\n\n    this._completeHide(relatedTarget);\n  }\n\n  dispose() {\n    if (this._popper) {\n      this._popper.destroy();\n    }\n\n    super.dispose();\n  }\n\n  update() {\n    this._inNavbar = this._detectNavbar();\n\n    if (this._popper) {\n      this._popper.update();\n    }\n  } // Private\n\n\n  _completeHide(relatedTarget) {\n    const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE$4, relatedTarget);\n\n    if (hideEvent.defaultPrevented) {\n      return;\n    } // If this is a touch-enabled device we remove the extra\n    // empty mouseover listeners we added for iOS support\n\n\n    if ('ontouchstart' in document.documentElement) {\n      [].concat(...document.body.children).forEach(elem => EventHandler.off(elem, 'mouseover', noop));\n    }\n\n    if (this._popper) {\n      this._popper.destroy();\n    }\n\n    this._menu.classList.remove(CLASS_NAME_SHOW$6);\n\n    this._element.classList.remove(CLASS_NAME_SHOW$6);\n\n    this._element.setAttribute('aria-expanded', 'false');\n\n    Manipulator.removeDataAttribute(this._menu, 'popper');\n    EventHandler.trigger(this._element, EVENT_HIDDEN$4, relatedTarget);\n  }\n\n  _getConfig(config) {\n    config = { ...this.constructor.Default,\n      ...Manipulator.getDataAttributes(this._element),\n      ...config\n    };\n    typeCheckConfig(NAME$9, config, this.constructor.DefaultType);\n\n    if (typeof config.reference === 'object' && !isElement(config.reference) && typeof config.reference.getBoundingClientRect !== 'function') {\n      // Popper virtual elements require a getBoundingClientRect method\n      throw new TypeError(`${NAME$9.toUpperCase()}: Option \"reference\" provided type \"object\" without a required \"getBoundingClientRect\" method.`);\n    }\n\n    return config;\n  }\n\n  _createPopper(parent) {\n    if (typeof Popper === 'undefined') {\n      throw new TypeError('Bootstrap\\'s dropdowns require Popper (https://popper.js.org)');\n    }\n\n    let referenceElement = this._element;\n\n    if (this._config.reference === 'parent') {\n      referenceElement = parent;\n    } else if (isElement(this._config.reference)) {\n      referenceElement = getElement(this._config.reference);\n    } else if (typeof this._config.reference === 'object') {\n      referenceElement = this._config.reference;\n    }\n\n    const popperConfig = this._getPopperConfig();\n\n    const isDisplayStatic = popperConfig.modifiers.find(modifier => modifier.name === 'applyStyles' && modifier.enabled === false);\n    this._popper = Popper.createPopper(referenceElement, this._menu, popperConfig);\n\n    if (isDisplayStatic) {\n      Manipulator.setDataAttribute(this._menu, 'popper', 'static');\n    }\n  }\n\n  _isShown(element = this._element) {\n    return element.classList.contains(CLASS_NAME_SHOW$6);\n  }\n\n  _getMenuElement() {\n    return SelectorEngine.next(this._element, SELECTOR_MENU)[0];\n  }\n\n  _getPlacement() {\n    const parentDropdown = this._element.parentNode;\n\n    if (parentDropdown.classList.contains(CLASS_NAME_DROPEND)) {\n      return PLACEMENT_RIGHT;\n    }\n\n    if (parentDropdown.classList.contains(CLASS_NAME_DROPSTART)) {\n      return PLACEMENT_LEFT;\n    } // We need to trim the value because custom properties can also include spaces\n\n\n    const isEnd = getComputedStyle(this._menu).getPropertyValue('--bs-position').trim() === 'end';\n\n    if (parentDropdown.classList.contains(CLASS_NAME_DROPUP)) {\n      return isEnd ? PLACEMENT_TOPEND : PLACEMENT_TOP;\n    }\n\n    return isEnd ? PLACEMENT_BOTTOMEND : PLACEMENT_BOTTOM;\n  }\n\n  _detectNavbar() {\n    return this._element.closest(`.${CLASS_NAME_NAVBAR}`) !== null;\n  }\n\n  _getOffset() {\n    const {\n      offset\n    } = this._config;\n\n    if (typeof offset === 'string') {\n      return offset.split(',').map(val => Number.parseInt(val, 10));\n    }\n\n    if (typeof offset === 'function') {\n      return popperData => offset(popperData, this._element);\n    }\n\n    return offset;\n  }\n\n  _getPopperConfig() {\n    const defaultBsPopperConfig = {\n      placement: this._getPlacement(),\n      modifiers: [{\n        name: 'preventOverflow',\n        options: {\n          boundary: this._config.boundary\n        }\n      }, {\n        name: 'offset',\n        options: {\n          offset: this._getOffset()\n        }\n      }]\n    }; // Disable Popper if we have a static display\n\n    if (this._config.display === 'static') {\n      defaultBsPopperConfig.modifiers = [{\n        name: 'applyStyles',\n        enabled: false\n      }];\n    }\n\n    return { ...defaultBsPopperConfig,\n      ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)\n    };\n  }\n\n  _selectMenuItem({\n    key,\n    target\n  }) {\n    const items = SelectorEngine.find(SELECTOR_VISIBLE_ITEMS, this._menu).filter(isVisible);\n\n    if (!items.length) {\n      return;\n    } // if target isn't included in items (e.g. when expanding the dropdown)\n    // allow cycling to get the last item in case key equals ARROW_UP_KEY\n\n\n    getNextActiveElement(items, target, key === ARROW_DOWN_KEY, !items.includes(target)).focus();\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Dropdown.getOrCreateInstance(this, config);\n\n      if (typeof config !== 'string') {\n        return;\n      }\n\n      if (typeof data[config] === 'undefined') {\n        throw new TypeError(`No method named \"${config}\"`);\n      }\n\n      data[config]();\n    });\n  }\n\n  static clearMenus(event) {\n    if (event && (event.button === RIGHT_MOUSE_BUTTON || event.type === 'keyup' && event.key !== TAB_KEY$1)) {\n      return;\n    }\n\n    const toggles = SelectorEngine.find(SELECTOR_DATA_TOGGLE$3);\n\n    for (let i = 0, len = toggles.length; i < len; i++) {\n      const context = Dropdown.getInstance(toggles[i]);\n\n      if (!context || context._config.autoClose === false) {\n        continue;\n      }\n\n      if (!context._isShown()) {\n        continue;\n      }\n\n      const relatedTarget = {\n        relatedTarget: context._element\n      };\n\n      if (event) {\n        const composedPath = event.composedPath();\n        const isMenuTarget = composedPath.includes(context._menu);\n\n        if (composedPath.includes(context._element) || context._config.autoClose === 'inside' && !isMenuTarget || context._config.autoClose === 'outside' && isMenuTarget) {\n          continue;\n        } // Tab navigation through the dropdown menu or events from contained inputs shouldn't close the menu\n\n\n        if (context._menu.contains(event.target) && (event.type === 'keyup' && event.key === TAB_KEY$1 || /input|select|option|textarea|form/i.test(event.target.tagName))) {\n          continue;\n        }\n\n        if (event.type === 'click') {\n          relatedTarget.clickEvent = event;\n        }\n      }\n\n      context._completeHide(relatedTarget);\n    }\n  }\n\n  static getParentFromElement(element) {\n    return getElementFromSelector(element) || element.parentNode;\n  }\n\n  static dataApiKeydownHandler(event) {\n    // If not input/textarea:\n    //  - And not a key in REGEXP_KEYDOWN => not a dropdown command\n    // If input/textarea:\n    //  - If space key => not a dropdown command\n    //  - If key is other than escape\n    //    - If key is not up or down => not a dropdown command\n    //    - If trigger inside the menu => not a dropdown command\n    if (/input|textarea/i.test(event.target.tagName) ? event.key === SPACE_KEY || event.key !== ESCAPE_KEY$2 && (event.key !== ARROW_DOWN_KEY && event.key !== ARROW_UP_KEY || event.target.closest(SELECTOR_MENU)) : !REGEXP_KEYDOWN.test(event.key)) {\n      return;\n    }\n\n    const isActive = this.classList.contains(CLASS_NAME_SHOW$6);\n\n    if (!isActive && event.key === ESCAPE_KEY$2) {\n      return;\n    }\n\n    event.preventDefault();\n    event.stopPropagation();\n\n    if (isDisabled(this)) {\n      return;\n    }\n\n    const getToggleButton = this.matches(SELECTOR_DATA_TOGGLE$3) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE$3)[0];\n    const instance = Dropdown.getOrCreateInstance(getToggleButton);\n\n    if (event.key === ESCAPE_KEY$2) {\n      instance.hide();\n      return;\n    }\n\n    if (event.key === ARROW_UP_KEY || event.key === ARROW_DOWN_KEY) {\n      if (!isActive) {\n        instance.show();\n      }\n\n      instance._selectMenuItem(event);\n\n      return;\n    }\n\n    if (!isActive || event.key === SPACE_KEY) {\n      Dropdown.clearMenus();\n    }\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_DATA_TOGGLE$3, Dropdown.dataApiKeydownHandler);\nEventHandler.on(document, EVENT_KEYDOWN_DATA_API, SELECTOR_MENU, Dropdown.dataApiKeydownHandler);\nEventHandler.on(document, EVENT_CLICK_DATA_API$3, Dropdown.clearMenus);\nEventHandler.on(document, EVENT_KEYUP_DATA_API, Dropdown.clearMenus);\nEventHandler.on(document, EVENT_CLICK_DATA_API$3, SELECTOR_DATA_TOGGLE$3, function (event) {\n  event.preventDefault();\n  Dropdown.getOrCreateInstance(this).toggle();\n});\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Dropdown to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Dropdown);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): util/scrollBar.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nconst SELECTOR_FIXED_CONTENT = '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top';\nconst SELECTOR_STICKY_CONTENT = '.sticky-top';\n\nclass ScrollBarHelper {\n  constructor() {\n    this._element = document.body;\n  }\n\n  getWidth() {\n    // https://developer.mozilla.org/en-US/docs/Web/API/Window/innerWidth#usage_notes\n    const documentWidth = document.documentElement.clientWidth;\n    return Math.abs(window.innerWidth - documentWidth);\n  }\n\n  hide() {\n    const width = this.getWidth();\n\n    this._disableOverFlow(); // give padding to element to balance the hidden scrollbar width\n\n\n    this._setElementAttributes(this._element, 'paddingRight', calculatedValue => calculatedValue + width); // trick: We adjust positive paddingRight and negative marginRight to sticky-top elements to keep showing fullwidth\n\n\n    this._setElementAttributes(SELECTOR_FIXED_CONTENT, 'paddingRight', calculatedValue => calculatedValue + width);\n\n    this._setElementAttributes(SELECTOR_STICKY_CONTENT, 'marginRight', calculatedValue => calculatedValue - width);\n  }\n\n  _disableOverFlow() {\n    this._saveInitialAttribute(this._element, 'overflow');\n\n    this._element.style.overflow = 'hidden';\n  }\n\n  _setElementAttributes(selector, styleProp, callback) {\n    const scrollbarWidth = this.getWidth();\n\n    const manipulationCallBack = element => {\n      if (element !== this._element && window.innerWidth > element.clientWidth + scrollbarWidth) {\n        return;\n      }\n\n      this._saveInitialAttribute(element, styleProp);\n\n      const calculatedValue = window.getComputedStyle(element)[styleProp];\n      element.style[styleProp] = `${callback(Number.parseFloat(calculatedValue))}px`;\n    };\n\n    this._applyManipulationCallback(selector, manipulationCallBack);\n  }\n\n  reset() {\n    this._resetElementAttributes(this._element, 'overflow');\n\n    this._resetElementAttributes(this._element, 'paddingRight');\n\n    this._resetElementAttributes(SELECTOR_FIXED_CONTENT, 'paddingRight');\n\n    this._resetElementAttributes(SELECTOR_STICKY_CONTENT, 'marginRight');\n  }\n\n  _saveInitialAttribute(element, styleProp) {\n    const actualValue = element.style[styleProp];\n\n    if (actualValue) {\n      Manipulator.setDataAttribute(element, styleProp, actualValue);\n    }\n  }\n\n  _resetElementAttributes(selector, styleProp) {\n    const manipulationCallBack = element => {\n      const value = Manipulator.getDataAttribute(element, styleProp);\n\n      if (typeof value === 'undefined') {\n        element.style.removeProperty(styleProp);\n      } else {\n        Manipulator.removeDataAttribute(element, styleProp);\n        element.style[styleProp] = value;\n      }\n    };\n\n    this._applyManipulationCallback(selector, manipulationCallBack);\n  }\n\n  _applyManipulationCallback(selector, callBack) {\n    if (isElement(selector)) {\n      callBack(selector);\n    } else {\n      SelectorEngine.find(selector, this._element).forEach(callBack);\n    }\n  }\n\n  isOverflowing() {\n    return this.getWidth() > 0;\n  }\n\n}\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): util/backdrop.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nconst Default$7 = {\n  className: 'modal-backdrop',\n  isVisible: true,\n  // if false, we use the backdrop helper without adding any element to the dom\n  isAnimated: false,\n  rootElement: 'body',\n  // give the choice to place backdrop under different elements\n  clickCallback: null\n};\nconst DefaultType$7 = {\n  className: 'string',\n  isVisible: 'boolean',\n  isAnimated: 'boolean',\n  rootElement: '(element|string)',\n  clickCallback: '(function|null)'\n};\nconst NAME$8 = 'backdrop';\nconst CLASS_NAME_FADE$4 = 'fade';\nconst CLASS_NAME_SHOW$5 = 'show';\nconst EVENT_MOUSEDOWN = `mousedown.bs.${NAME$8}`;\n\nclass Backdrop {\n  constructor(config) {\n    this._config = this._getConfig(config);\n    this._isAppended = false;\n    this._element = null;\n  }\n\n  show(callback) {\n    if (!this._config.isVisible) {\n      execute(callback);\n      return;\n    }\n\n    this._append();\n\n    if (this._config.isAnimated) {\n      reflow(this._getElement());\n    }\n\n    this._getElement().classList.add(CLASS_NAME_SHOW$5);\n\n    this._emulateAnimation(() => {\n      execute(callback);\n    });\n  }\n\n  hide(callback) {\n    if (!this._config.isVisible) {\n      execute(callback);\n      return;\n    }\n\n    this._getElement().classList.remove(CLASS_NAME_SHOW$5);\n\n    this._emulateAnimation(() => {\n      this.dispose();\n      execute(callback);\n    });\n  } // Private\n\n\n  _getElement() {\n    if (!this._element) {\n      const backdrop = document.createElement('div');\n      backdrop.className = this._config.className;\n\n      if (this._config.isAnimated) {\n        backdrop.classList.add(CLASS_NAME_FADE$4);\n      }\n\n      this._element = backdrop;\n    }\n\n    return this._element;\n  }\n\n  _getConfig(config) {\n    config = { ...Default$7,\n      ...(typeof config === 'object' ? config : {})\n    }; // use getElement() with the default \"body\" to get a fresh Element on each instantiation\n\n    config.rootElement = getElement(config.rootElement);\n    typeCheckConfig(NAME$8, config, DefaultType$7);\n    return config;\n  }\n\n  _append() {\n    if (this._isAppended) {\n      return;\n    }\n\n    this._config.rootElement.append(this._getElement());\n\n    EventHandler.on(this._getElement(), EVENT_MOUSEDOWN, () => {\n      execute(this._config.clickCallback);\n    });\n    this._isAppended = true;\n  }\n\n  dispose() {\n    if (!this._isAppended) {\n      return;\n    }\n\n    EventHandler.off(this._element, EVENT_MOUSEDOWN);\n\n    this._element.remove();\n\n    this._isAppended = false;\n  }\n\n  _emulateAnimation(callback) {\n    executeAfterTransition(callback, this._getElement(), this._config.isAnimated);\n  }\n\n}\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): util/focustrap.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nconst Default$6 = {\n  trapElement: null,\n  // The element to trap focus inside of\n  autofocus: true\n};\nconst DefaultType$6 = {\n  trapElement: 'element',\n  autofocus: 'boolean'\n};\nconst NAME$7 = 'focustrap';\nconst DATA_KEY$7 = 'bs.focustrap';\nconst EVENT_KEY$7 = `.${DATA_KEY$7}`;\nconst EVENT_FOCUSIN$1 = `focusin${EVENT_KEY$7}`;\nconst EVENT_KEYDOWN_TAB = `keydown.tab${EVENT_KEY$7}`;\nconst TAB_KEY = 'Tab';\nconst TAB_NAV_FORWARD = 'forward';\nconst TAB_NAV_BACKWARD = 'backward';\n\nclass FocusTrap {\n  constructor(config) {\n    this._config = this._getConfig(config);\n    this._isActive = false;\n    this._lastTabNavDirection = null;\n  }\n\n  activate() {\n    const {\n      trapElement,\n      autofocus\n    } = this._config;\n\n    if (this._isActive) {\n      return;\n    }\n\n    if (autofocus) {\n      trapElement.focus();\n    }\n\n    EventHandler.off(document, EVENT_KEY$7); // guard against infinite focus loop\n\n    EventHandler.on(document, EVENT_FOCUSIN$1, event => this._handleFocusin(event));\n    EventHandler.on(document, EVENT_KEYDOWN_TAB, event => this._handleKeydown(event));\n    this._isActive = true;\n  }\n\n  deactivate() {\n    if (!this._isActive) {\n      return;\n    }\n\n    this._isActive = false;\n    EventHandler.off(document, EVENT_KEY$7);\n  } // Private\n\n\n  _handleFocusin(event) {\n    const {\n      target\n    } = event;\n    const {\n      trapElement\n    } = this._config;\n\n    if (target === document || target === trapElement || trapElement.contains(target)) {\n      return;\n    }\n\n    const elements = SelectorEngine.focusableChildren(trapElement);\n\n    if (elements.length === 0) {\n      trapElement.focus();\n    } else if (this._lastTabNavDirection === TAB_NAV_BACKWARD) {\n      elements[elements.length - 1].focus();\n    } else {\n      elements[0].focus();\n    }\n  }\n\n  _handleKeydown(event) {\n    if (event.key !== TAB_KEY) {\n      return;\n    }\n\n    this._lastTabNavDirection = event.shiftKey ? TAB_NAV_BACKWARD : TAB_NAV_FORWARD;\n  }\n\n  _getConfig(config) {\n    config = { ...Default$6,\n      ...(typeof config === 'object' ? config : {})\n    };\n    typeCheckConfig(NAME$7, config, DefaultType$6);\n    return config;\n  }\n\n}\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): modal.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$6 = 'modal';\nconst DATA_KEY$6 = 'bs.modal';\nconst EVENT_KEY$6 = `.${DATA_KEY$6}`;\nconst DATA_API_KEY$3 = '.data-api';\nconst ESCAPE_KEY$1 = 'Escape';\nconst Default$5 = {\n  backdrop: true,\n  keyboard: true,\n  focus: true\n};\nconst DefaultType$5 = {\n  backdrop: '(boolean|string)',\n  keyboard: 'boolean',\n  focus: 'boolean'\n};\nconst EVENT_HIDE$3 = `hide${EVENT_KEY$6}`;\nconst EVENT_HIDE_PREVENTED = `hidePrevented${EVENT_KEY$6}`;\nconst EVENT_HIDDEN$3 = `hidden${EVENT_KEY$6}`;\nconst EVENT_SHOW$3 = `show${EVENT_KEY$6}`;\nconst EVENT_SHOWN$3 = `shown${EVENT_KEY$6}`;\nconst EVENT_RESIZE = `resize${EVENT_KEY$6}`;\nconst EVENT_CLICK_DISMISS = `click.dismiss${EVENT_KEY$6}`;\nconst EVENT_KEYDOWN_DISMISS$1 = `keydown.dismiss${EVENT_KEY$6}`;\nconst EVENT_MOUSEUP_DISMISS = `mouseup.dismiss${EVENT_KEY$6}`;\nconst EVENT_MOUSEDOWN_DISMISS = `mousedown.dismiss${EVENT_KEY$6}`;\nconst EVENT_CLICK_DATA_API$2 = `click${EVENT_KEY$6}${DATA_API_KEY$3}`;\nconst CLASS_NAME_OPEN = 'modal-open';\nconst CLASS_NAME_FADE$3 = 'fade';\nconst CLASS_NAME_SHOW$4 = 'show';\nconst CLASS_NAME_STATIC = 'modal-static';\nconst OPEN_SELECTOR$1 = '.modal.show';\nconst SELECTOR_DIALOG = '.modal-dialog';\nconst SELECTOR_MODAL_BODY = '.modal-body';\nconst SELECTOR_DATA_TOGGLE$2 = '[data-bs-toggle=\"modal\"]';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Modal extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._config = this._getConfig(config);\n    this._dialog = SelectorEngine.findOne(SELECTOR_DIALOG, this._element);\n    this._backdrop = this._initializeBackDrop();\n    this._focustrap = this._initializeFocusTrap();\n    this._isShown = false;\n    this._ignoreBackdropClick = false;\n    this._isTransitioning = false;\n    this._scrollBar = new ScrollBarHelper();\n  } // Getters\n\n\n  static get Default() {\n    return Default$5;\n  }\n\n  static get NAME() {\n    return NAME$6;\n  } // Public\n\n\n  toggle(relatedTarget) {\n    return this._isShown ? this.hide() : this.show(relatedTarget);\n  }\n\n  show(relatedTarget) {\n    if (this._isShown || this._isTransitioning) {\n      return;\n    }\n\n    const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$3, {\n      relatedTarget\n    });\n\n    if (showEvent.defaultPrevented) {\n      return;\n    }\n\n    this._isShown = true;\n\n    if (this._isAnimated()) {\n      this._isTransitioning = true;\n    }\n\n    this._scrollBar.hide();\n\n    document.body.classList.add(CLASS_NAME_OPEN);\n\n    this._adjustDialog();\n\n    this._setEscapeEvent();\n\n    this._setResizeEvent();\n\n    EventHandler.on(this._dialog, EVENT_MOUSEDOWN_DISMISS, () => {\n      EventHandler.one(this._element, EVENT_MOUSEUP_DISMISS, event => {\n        if (event.target === this._element) {\n          this._ignoreBackdropClick = true;\n        }\n      });\n    });\n\n    this._showBackdrop(() => this._showElement(relatedTarget));\n  }\n\n  hide() {\n    if (!this._isShown || this._isTransitioning) {\n      return;\n    }\n\n    const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE$3);\n\n    if (hideEvent.defaultPrevented) {\n      return;\n    }\n\n    this._isShown = false;\n\n    const isAnimated = this._isAnimated();\n\n    if (isAnimated) {\n      this._isTransitioning = true;\n    }\n\n    this._setEscapeEvent();\n\n    this._setResizeEvent();\n\n    this._focustrap.deactivate();\n\n    this._element.classList.remove(CLASS_NAME_SHOW$4);\n\n    EventHandler.off(this._element, EVENT_CLICK_DISMISS);\n    EventHandler.off(this._dialog, EVENT_MOUSEDOWN_DISMISS);\n\n    this._queueCallback(() => this._hideModal(), this._element, isAnimated);\n  }\n\n  dispose() {\n    [window, this._dialog].forEach(htmlElement => EventHandler.off(htmlElement, EVENT_KEY$6));\n\n    this._backdrop.dispose();\n\n    this._focustrap.deactivate();\n\n    super.dispose();\n  }\n\n  handleUpdate() {\n    this._adjustDialog();\n  } // Private\n\n\n  _initializeBackDrop() {\n    return new Backdrop({\n      isVisible: Boolean(this._config.backdrop),\n      // 'static' option will be translated to true, and booleans will keep their value\n      isAnimated: this._isAnimated()\n    });\n  }\n\n  _initializeFocusTrap() {\n    return new FocusTrap({\n      trapElement: this._element\n    });\n  }\n\n  _getConfig(config) {\n    config = { ...Default$5,\n      ...Manipulator.getDataAttributes(this._element),\n      ...(typeof config === 'object' ? config : {})\n    };\n    typeCheckConfig(NAME$6, config, DefaultType$5);\n    return config;\n  }\n\n  _showElement(relatedTarget) {\n    const isAnimated = this._isAnimated();\n\n    const modalBody = SelectorEngine.findOne(SELECTOR_MODAL_BODY, this._dialog);\n\n    if (!this._element.parentNode || this._element.parentNode.nodeType !== Node.ELEMENT_NODE) {\n      // Don't move modal's DOM position\n      document.body.append(this._element);\n    }\n\n    this._element.style.display = 'block';\n\n    this._element.removeAttribute('aria-hidden');\n\n    this._element.setAttribute('aria-modal', true);\n\n    this._element.setAttribute('role', 'dialog');\n\n    this._element.scrollTop = 0;\n\n    if (modalBody) {\n      modalBody.scrollTop = 0;\n    }\n\n    if (isAnimated) {\n      reflow(this._element);\n    }\n\n    this._element.classList.add(CLASS_NAME_SHOW$4);\n\n    const transitionComplete = () => {\n      if (this._config.focus) {\n        this._focustrap.activate();\n      }\n\n      this._isTransitioning = false;\n      EventHandler.trigger(this._element, EVENT_SHOWN$3, {\n        relatedTarget\n      });\n    };\n\n    this._queueCallback(transitionComplete, this._dialog, isAnimated);\n  }\n\n  _setEscapeEvent() {\n    if (this._isShown) {\n      EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS$1, event => {\n        if (this._config.keyboard && event.key === ESCAPE_KEY$1) {\n          event.preventDefault();\n          this.hide();\n        } else if (!this._config.keyboard && event.key === ESCAPE_KEY$1) {\n          this._triggerBackdropTransition();\n        }\n      });\n    } else {\n      EventHandler.off(this._element, EVENT_KEYDOWN_DISMISS$1);\n    }\n  }\n\n  _setResizeEvent() {\n    if (this._isShown) {\n      EventHandler.on(window, EVENT_RESIZE, () => this._adjustDialog());\n    } else {\n      EventHandler.off(window, EVENT_RESIZE);\n    }\n  }\n\n  _hideModal() {\n    this._element.style.display = 'none';\n\n    this._element.setAttribute('aria-hidden', true);\n\n    this._element.removeAttribute('aria-modal');\n\n    this._element.removeAttribute('role');\n\n    this._isTransitioning = false;\n\n    this._backdrop.hide(() => {\n      document.body.classList.remove(CLASS_NAME_OPEN);\n\n      this._resetAdjustments();\n\n      this._scrollBar.reset();\n\n      EventHandler.trigger(this._element, EVENT_HIDDEN$3);\n    });\n  }\n\n  _showBackdrop(callback) {\n    EventHandler.on(this._element, EVENT_CLICK_DISMISS, event => {\n      if (this._ignoreBackdropClick) {\n        this._ignoreBackdropClick = false;\n        return;\n      }\n\n      if (event.target !== event.currentTarget) {\n        return;\n      }\n\n      if (this._config.backdrop === true) {\n        this.hide();\n      } else if (this._config.backdrop === 'static') {\n        this._triggerBackdropTransition();\n      }\n    });\n\n    this._backdrop.show(callback);\n  }\n\n  _isAnimated() {\n    return this._element.classList.contains(CLASS_NAME_FADE$3);\n  }\n\n  _triggerBackdropTransition() {\n    const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED);\n\n    if (hideEvent.defaultPrevented) {\n      return;\n    }\n\n    const {\n      classList,\n      scrollHeight,\n      style\n    } = this._element;\n    const isModalOverflowing = scrollHeight > document.documentElement.clientHeight; // return if the following background transition hasn't yet completed\n\n    if (!isModalOverflowing && style.overflowY === 'hidden' || classList.contains(CLASS_NAME_STATIC)) {\n      return;\n    }\n\n    if (!isModalOverflowing) {\n      style.overflowY = 'hidden';\n    }\n\n    classList.add(CLASS_NAME_STATIC);\n\n    this._queueCallback(() => {\n      classList.remove(CLASS_NAME_STATIC);\n\n      if (!isModalOverflowing) {\n        this._queueCallback(() => {\n          style.overflowY = '';\n        }, this._dialog);\n      }\n    }, this._dialog);\n\n    this._element.focus();\n  } // ----------------------------------------------------------------------\n  // the following methods are used to handle overflowing modals\n  // ----------------------------------------------------------------------\n\n\n  _adjustDialog() {\n    const isModalOverflowing = this._element.scrollHeight > document.documentElement.clientHeight;\n\n    const scrollbarWidth = this._scrollBar.getWidth();\n\n    const isBodyOverflowing = scrollbarWidth > 0;\n\n    if (!isBodyOverflowing && isModalOverflowing && !isRTL() || isBodyOverflowing && !isModalOverflowing && isRTL()) {\n      this._element.style.paddingLeft = `${scrollbarWidth}px`;\n    }\n\n    if (isBodyOverflowing && !isModalOverflowing && !isRTL() || !isBodyOverflowing && isModalOverflowing && isRTL()) {\n      this._element.style.paddingRight = `${scrollbarWidth}px`;\n    }\n  }\n\n  _resetAdjustments() {\n    this._element.style.paddingLeft = '';\n    this._element.style.paddingRight = '';\n  } // Static\n\n\n  static jQueryInterface(config, relatedTarget) {\n    return this.each(function () {\n      const data = Modal.getOrCreateInstance(this, config);\n\n      if (typeof config !== 'string') {\n        return;\n      }\n\n      if (typeof data[config] === 'undefined') {\n        throw new TypeError(`No method named \"${config}\"`);\n      }\n\n      data[config](relatedTarget);\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_CLICK_DATA_API$2, SELECTOR_DATA_TOGGLE$2, function (event) {\n  const target = getElementFromSelector(this);\n\n  if (['A', 'AREA'].includes(this.tagName)) {\n    event.preventDefault();\n  }\n\n  EventHandler.one(target, EVENT_SHOW$3, showEvent => {\n    if (showEvent.defaultPrevented) {\n      // only register focus restorer if modal will actually get shown\n      return;\n    }\n\n    EventHandler.one(target, EVENT_HIDDEN$3, () => {\n      if (isVisible(this)) {\n        this.focus();\n      }\n    });\n  }); // avoid conflict when clicking moddal toggler while another one is open\n\n  const allReadyOpen = SelectorEngine.findOne(OPEN_SELECTOR$1);\n\n  if (allReadyOpen) {\n    Modal.getInstance(allReadyOpen).hide();\n  }\n\n  const data = Modal.getOrCreateInstance(target);\n  data.toggle(this);\n});\nenableDismissTrigger(Modal);\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Modal to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Modal);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): offcanvas.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$5 = 'offcanvas';\nconst DATA_KEY$5 = 'bs.offcanvas';\nconst EVENT_KEY$5 = `.${DATA_KEY$5}`;\nconst DATA_API_KEY$2 = '.data-api';\nconst EVENT_LOAD_DATA_API$1 = `load${EVENT_KEY$5}${DATA_API_KEY$2}`;\nconst ESCAPE_KEY = 'Escape';\nconst Default$4 = {\n  backdrop: true,\n  keyboard: true,\n  scroll: false\n};\nconst DefaultType$4 = {\n  backdrop: 'boolean',\n  keyboard: 'boolean',\n  scroll: 'boolean'\n};\nconst CLASS_NAME_SHOW$3 = 'show';\nconst CLASS_NAME_BACKDROP = 'offcanvas-backdrop';\nconst OPEN_SELECTOR = '.offcanvas.show';\nconst EVENT_SHOW$2 = `show${EVENT_KEY$5}`;\nconst EVENT_SHOWN$2 = `shown${EVENT_KEY$5}`;\nconst EVENT_HIDE$2 = `hide${EVENT_KEY$5}`;\nconst EVENT_HIDDEN$2 = `hidden${EVENT_KEY$5}`;\nconst EVENT_CLICK_DATA_API$1 = `click${EVENT_KEY$5}${DATA_API_KEY$2}`;\nconst EVENT_KEYDOWN_DISMISS = `keydown.dismiss${EVENT_KEY$5}`;\nconst SELECTOR_DATA_TOGGLE$1 = '[data-bs-toggle=\"offcanvas\"]';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Offcanvas extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._config = this._getConfig(config);\n    this._isShown = false;\n    this._backdrop = this._initializeBackDrop();\n    this._focustrap = this._initializeFocusTrap();\n\n    this._addEventListeners();\n  } // Getters\n\n\n  static get NAME() {\n    return NAME$5;\n  }\n\n  static get Default() {\n    return Default$4;\n  } // Public\n\n\n  toggle(relatedTarget) {\n    return this._isShown ? this.hide() : this.show(relatedTarget);\n  }\n\n  show(relatedTarget) {\n    if (this._isShown) {\n      return;\n    }\n\n    const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$2, {\n      relatedTarget\n    });\n\n    if (showEvent.defaultPrevented) {\n      return;\n    }\n\n    this._isShown = true;\n    this._element.style.visibility = 'visible';\n\n    this._backdrop.show();\n\n    if (!this._config.scroll) {\n      new ScrollBarHelper().hide();\n    }\n\n    this._element.removeAttribute('aria-hidden');\n\n    this._element.setAttribute('aria-modal', true);\n\n    this._element.setAttribute('role', 'dialog');\n\n    this._element.classList.add(CLASS_NAME_SHOW$3);\n\n    const completeCallBack = () => {\n      if (!this._config.scroll) {\n        this._focustrap.activate();\n      }\n\n      EventHandler.trigger(this._element, EVENT_SHOWN$2, {\n        relatedTarget\n      });\n    };\n\n    this._queueCallback(completeCallBack, this._element, true);\n  }\n\n  hide() {\n    if (!this._isShown) {\n      return;\n    }\n\n    const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE$2);\n\n    if (hideEvent.defaultPrevented) {\n      return;\n    }\n\n    this._focustrap.deactivate();\n\n    this._element.blur();\n\n    this._isShown = false;\n\n    this._element.classList.remove(CLASS_NAME_SHOW$3);\n\n    this._backdrop.hide();\n\n    const completeCallback = () => {\n      this._element.setAttribute('aria-hidden', true);\n\n      this._element.removeAttribute('aria-modal');\n\n      this._element.removeAttribute('role');\n\n      this._element.style.visibility = 'hidden';\n\n      if (!this._config.scroll) {\n        new ScrollBarHelper().reset();\n      }\n\n      EventHandler.trigger(this._element, EVENT_HIDDEN$2);\n    };\n\n    this._queueCallback(completeCallback, this._element, true);\n  }\n\n  dispose() {\n    this._backdrop.dispose();\n\n    this._focustrap.deactivate();\n\n    super.dispose();\n  } // Private\n\n\n  _getConfig(config) {\n    config = { ...Default$4,\n      ...Manipulator.getDataAttributes(this._element),\n      ...(typeof config === 'object' ? config : {})\n    };\n    typeCheckConfig(NAME$5, config, DefaultType$4);\n    return config;\n  }\n\n  _initializeBackDrop() {\n    return new Backdrop({\n      className: CLASS_NAME_BACKDROP,\n      isVisible: this._config.backdrop,\n      isAnimated: true,\n      rootElement: this._element.parentNode,\n      clickCallback: () => this.hide()\n    });\n  }\n\n  _initializeFocusTrap() {\n    return new FocusTrap({\n      trapElement: this._element\n    });\n  }\n\n  _addEventListeners() {\n    EventHandler.on(this._element, EVENT_KEYDOWN_DISMISS, event => {\n      if (this._config.keyboard && event.key === ESCAPE_KEY) {\n        this.hide();\n      }\n    });\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Offcanvas.getOrCreateInstance(this, config);\n\n      if (typeof config !== 'string') {\n        return;\n      }\n\n      if (data[config] === undefined || config.startsWith('_') || config === 'constructor') {\n        throw new TypeError(`No method named \"${config}\"`);\n      }\n\n      data[config](this);\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_CLICK_DATA_API$1, SELECTOR_DATA_TOGGLE$1, function (event) {\n  const target = getElementFromSelector(this);\n\n  if (['A', 'AREA'].includes(this.tagName)) {\n    event.preventDefault();\n  }\n\n  if (isDisabled(this)) {\n    return;\n  }\n\n  EventHandler.one(target, EVENT_HIDDEN$2, () => {\n    // focus on trigger when it is closed\n    if (isVisible(this)) {\n      this.focus();\n    }\n  }); // avoid conflict when clicking a toggler of an offcanvas, while another is open\n\n  const allReadyOpen = SelectorEngine.findOne(OPEN_SELECTOR);\n\n  if (allReadyOpen && allReadyOpen !== target) {\n    Offcanvas.getInstance(allReadyOpen).hide();\n  }\n\n  const data = Offcanvas.getOrCreateInstance(target);\n  data.toggle(this);\n});\nEventHandler.on(window, EVENT_LOAD_DATA_API$1, () => SelectorEngine.find(OPEN_SELECTOR).forEach(el => Offcanvas.getOrCreateInstance(el).show()));\nenableDismissTrigger(Offcanvas);\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n */\n\ndefineJQueryPlugin(Offcanvas);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): util/sanitizer.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\nconst uriAttributes = new Set(['background', 'cite', 'href', 'itemtype', 'longdesc', 'poster', 'src', 'xlink:href']);\nconst ARIA_ATTRIBUTE_PATTERN = /^aria-[\\w-]*$/i;\n/**\n * A pattern that recognizes a commonly useful subset of URLs that are safe.\n *\n * Shoutout to Angular https://github.com/angular/angular/blob/12.2.x/packages/core/src/sanitization/url_sanitizer.ts\n */\n\nconst SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file|sms):|[^#&/:?]*(?:[#/?]|$))/i;\n/**\n * A pattern that matches safe data URLs. Only matches image, video and audio types.\n *\n * Shoutout to Angular https://github.com/angular/angular/blob/12.2.x/packages/core/src/sanitization/url_sanitizer.ts\n */\n\nconst DATA_URL_PATTERN = /^data:(?:image\\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\\/(?:mpeg|mp4|ogg|webm)|audio\\/(?:mp3|oga|ogg|opus));base64,[\\d+/a-z]+=*$/i;\n\nconst allowedAttribute = (attribute, allowedAttributeList) => {\n  const attributeName = attribute.nodeName.toLowerCase();\n\n  if (allowedAttributeList.includes(attributeName)) {\n    if (uriAttributes.has(attributeName)) {\n      return Boolean(SAFE_URL_PATTERN.test(attribute.nodeValue) || DATA_URL_PATTERN.test(attribute.nodeValue));\n    }\n\n    return true;\n  }\n\n  const regExp = allowedAttributeList.filter(attributeRegex => attributeRegex instanceof RegExp); // Check if a regular expression validates the attribute.\n\n  for (let i = 0, len = regExp.length; i < len; i++) {\n    if (regExp[i].test(attributeName)) {\n      return true;\n    }\n  }\n\n  return false;\n};\n\nconst DefaultAllowlist = {\n  // Global attributes allowed on any supplied element below.\n  '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],\n  a: ['target', 'href', 'title', 'rel'],\n  area: [],\n  b: [],\n  br: [],\n  col: [],\n  code: [],\n  div: [],\n  em: [],\n  hr: [],\n  h1: [],\n  h2: [],\n  h3: [],\n  h4: [],\n  h5: [],\n  h6: [],\n  i: [],\n  img: ['src', 'srcset', 'alt', 'title', 'width', 'height'],\n  li: [],\n  ol: [],\n  p: [],\n  pre: [],\n  s: [],\n  small: [],\n  span: [],\n  sub: [],\n  sup: [],\n  strong: [],\n  u: [],\n  ul: []\n};\nfunction sanitizeHtml(unsafeHtml, allowList, sanitizeFn) {\n  if (!unsafeHtml.length) {\n    return unsafeHtml;\n  }\n\n  if (sanitizeFn && typeof sanitizeFn === 'function') {\n    return sanitizeFn(unsafeHtml);\n  }\n\n  const domParser = new window.DOMParser();\n  const createdDocument = domParser.parseFromString(unsafeHtml, 'text/html');\n  const elements = [].concat(...createdDocument.body.querySelectorAll('*'));\n\n  for (let i = 0, len = elements.length; i < len; i++) {\n    const element = elements[i];\n    const elementName = element.nodeName.toLowerCase();\n\n    if (!Object.keys(allowList).includes(elementName)) {\n      element.remove();\n      continue;\n    }\n\n    const attributeList = [].concat(...element.attributes);\n    const allowedAttributes = [].concat(allowList['*'] || [], allowList[elementName] || []);\n    attributeList.forEach(attribute => {\n      if (!allowedAttribute(attribute, allowedAttributes)) {\n        element.removeAttribute(attribute.nodeName);\n      }\n    });\n  }\n\n  return createdDocument.body.innerHTML;\n}\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): tooltip.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$4 = 'tooltip';\nconst DATA_KEY$4 = 'bs.tooltip';\nconst EVENT_KEY$4 = `.${DATA_KEY$4}`;\nconst CLASS_PREFIX$1 = 'bs-tooltip';\nconst DISALLOWED_ATTRIBUTES = new Set(['sanitize', 'allowList', 'sanitizeFn']);\nconst DefaultType$3 = {\n  animation: 'boolean',\n  template: 'string',\n  title: '(string|element|function)',\n  trigger: 'string',\n  delay: '(number|object)',\n  html: 'boolean',\n  selector: '(string|boolean)',\n  placement: '(string|function)',\n  offset: '(array|string|function)',\n  container: '(string|element|boolean)',\n  fallbackPlacements: 'array',\n  boundary: '(string|element)',\n  customClass: '(string|function)',\n  sanitize: 'boolean',\n  sanitizeFn: '(null|function)',\n  allowList: 'object',\n  popperConfig: '(null|object|function)'\n};\nconst AttachmentMap = {\n  AUTO: 'auto',\n  TOP: 'top',\n  RIGHT: isRTL() ? 'left' : 'right',\n  BOTTOM: 'bottom',\n  LEFT: isRTL() ? 'right' : 'left'\n};\nconst Default$3 = {\n  animation: true,\n  template: '<div class=\"tooltip\" role=\"tooltip\">' + '<div class=\"tooltip-arrow\"></div>' + '<div class=\"tooltip-inner\"></div>' + '</div>',\n  trigger: 'hover focus',\n  title: '',\n  delay: 0,\n  html: false,\n  selector: false,\n  placement: 'top',\n  offset: [0, 0],\n  container: false,\n  fallbackPlacements: ['top', 'right', 'bottom', 'left'],\n  boundary: 'clippingParents',\n  customClass: '',\n  sanitize: true,\n  sanitizeFn: null,\n  allowList: DefaultAllowlist,\n  popperConfig: null\n};\nconst Event$2 = {\n  HIDE: `hide${EVENT_KEY$4}`,\n  HIDDEN: `hidden${EVENT_KEY$4}`,\n  SHOW: `show${EVENT_KEY$4}`,\n  SHOWN: `shown${EVENT_KEY$4}`,\n  INSERTED: `inserted${EVENT_KEY$4}`,\n  CLICK: `click${EVENT_KEY$4}`,\n  FOCUSIN: `focusin${EVENT_KEY$4}`,\n  FOCUSOUT: `focusout${EVENT_KEY$4}`,\n  MOUSEENTER: `mouseenter${EVENT_KEY$4}`,\n  MOUSELEAVE: `mouseleave${EVENT_KEY$4}`\n};\nconst CLASS_NAME_FADE$2 = 'fade';\nconst CLASS_NAME_MODAL = 'modal';\nconst CLASS_NAME_SHOW$2 = 'show';\nconst HOVER_STATE_SHOW = 'show';\nconst HOVER_STATE_OUT = 'out';\nconst SELECTOR_TOOLTIP_INNER = '.tooltip-inner';\nconst SELECTOR_MODAL = `.${CLASS_NAME_MODAL}`;\nconst EVENT_MODAL_HIDE = 'hide.bs.modal';\nconst TRIGGER_HOVER = 'hover';\nconst TRIGGER_FOCUS = 'focus';\nconst TRIGGER_CLICK = 'click';\nconst TRIGGER_MANUAL = 'manual';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Tooltip extends BaseComponent {\n  constructor(element, config) {\n    if (typeof Popper === 'undefined') {\n      throw new TypeError('Bootstrap\\'s tooltips require Popper (https://popper.js.org)');\n    }\n\n    super(element); // private\n\n    this._isEnabled = true;\n    this._timeout = 0;\n    this._hoverState = '';\n    this._activeTrigger = {};\n    this._popper = null; // Protected\n\n    this._config = this._getConfig(config);\n    this.tip = null;\n\n    this._setListeners();\n  } // Getters\n\n\n  static get Default() {\n    return Default$3;\n  }\n\n  static get NAME() {\n    return NAME$4;\n  }\n\n  static get Event() {\n    return Event$2;\n  }\n\n  static get DefaultType() {\n    return DefaultType$3;\n  } // Public\n\n\n  enable() {\n    this._isEnabled = true;\n  }\n\n  disable() {\n    this._isEnabled = false;\n  }\n\n  toggleEnabled() {\n    this._isEnabled = !this._isEnabled;\n  }\n\n  toggle(event) {\n    if (!this._isEnabled) {\n      return;\n    }\n\n    if (event) {\n      const context = this._initializeOnDelegatedTarget(event);\n\n      context._activeTrigger.click = !context._activeTrigger.click;\n\n      if (context._isWithActiveTrigger()) {\n        context._enter(null, context);\n      } else {\n        context._leave(null, context);\n      }\n    } else {\n      if (this.getTipElement().classList.contains(CLASS_NAME_SHOW$2)) {\n        this._leave(null, this);\n\n        return;\n      }\n\n      this._enter(null, this);\n    }\n  }\n\n  dispose() {\n    clearTimeout(this._timeout);\n    EventHandler.off(this._element.closest(SELECTOR_MODAL), EVENT_MODAL_HIDE, this._hideModalHandler);\n\n    if (this.tip) {\n      this.tip.remove();\n    }\n\n    this._disposePopper();\n\n    super.dispose();\n  }\n\n  show() {\n    if (this._element.style.display === 'none') {\n      throw new Error('Please use show on visible elements');\n    }\n\n    if (!(this.isWithContent() && this._isEnabled)) {\n      return;\n    }\n\n    const showEvent = EventHandler.trigger(this._element, this.constructor.Event.SHOW);\n    const shadowRoot = findShadowRoot(this._element);\n    const isInTheDom = shadowRoot === null ? this._element.ownerDocument.documentElement.contains(this._element) : shadowRoot.contains(this._element);\n\n    if (showEvent.defaultPrevented || !isInTheDom) {\n      return;\n    } // A trick to recreate a tooltip in case a new title is given by using the NOT documented `data-bs-original-title`\n    // This will be removed later in favor of a `setContent` method\n\n\n    if (this.constructor.NAME === 'tooltip' && this.tip && this.getTitle() !== this.tip.querySelector(SELECTOR_TOOLTIP_INNER).innerHTML) {\n      this._disposePopper();\n\n      this.tip.remove();\n      this.tip = null;\n    }\n\n    const tip = this.getTipElement();\n    const tipId = getUID(this.constructor.NAME);\n    tip.setAttribute('id', tipId);\n\n    this._element.setAttribute('aria-describedby', tipId);\n\n    if (this._config.animation) {\n      tip.classList.add(CLASS_NAME_FADE$2);\n    }\n\n    const placement = typeof this._config.placement === 'function' ? this._config.placement.call(this, tip, this._element) : this._config.placement;\n\n    const attachment = this._getAttachment(placement);\n\n    this._addAttachmentClass(attachment);\n\n    const {\n      container\n    } = this._config;\n    Data.set(tip, this.constructor.DATA_KEY, this);\n\n    if (!this._element.ownerDocument.documentElement.contains(this.tip)) {\n      container.append(tip);\n      EventHandler.trigger(this._element, this.constructor.Event.INSERTED);\n    }\n\n    if (this._popper) {\n      this._popper.update();\n    } else {\n      this._popper = Popper.createPopper(this._element, tip, this._getPopperConfig(attachment));\n    }\n\n    tip.classList.add(CLASS_NAME_SHOW$2);\n\n    const customClass = this._resolvePossibleFunction(this._config.customClass);\n\n    if (customClass) {\n      tip.classList.add(...customClass.split(' '));\n    } // If this is a touch-enabled device we add extra\n    // empty mouseover listeners to the body's immediate children;\n    // only needed because of broken event delegation on iOS\n    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html\n\n\n    if ('ontouchstart' in document.documentElement) {\n      [].concat(...document.body.children).forEach(element => {\n        EventHandler.on(element, 'mouseover', noop);\n      });\n    }\n\n    const complete = () => {\n      const prevHoverState = this._hoverState;\n      this._hoverState = null;\n      EventHandler.trigger(this._element, this.constructor.Event.SHOWN);\n\n      if (prevHoverState === HOVER_STATE_OUT) {\n        this._leave(null, this);\n      }\n    };\n\n    const isAnimated = this.tip.classList.contains(CLASS_NAME_FADE$2);\n\n    this._queueCallback(complete, this.tip, isAnimated);\n  }\n\n  hide() {\n    if (!this._popper) {\n      return;\n    }\n\n    const tip = this.getTipElement();\n\n    const complete = () => {\n      if (this._isWithActiveTrigger()) {\n        return;\n      }\n\n      if (this._hoverState !== HOVER_STATE_SHOW) {\n        tip.remove();\n      }\n\n      this._cleanTipClass();\n\n      this._element.removeAttribute('aria-describedby');\n\n      EventHandler.trigger(this._element, this.constructor.Event.HIDDEN);\n\n      this._disposePopper();\n    };\n\n    const hideEvent = EventHandler.trigger(this._element, this.constructor.Event.HIDE);\n\n    if (hideEvent.defaultPrevented) {\n      return;\n    }\n\n    tip.classList.remove(CLASS_NAME_SHOW$2); // If this is a touch-enabled device we remove the extra\n    // empty mouseover listeners we added for iOS support\n\n    if ('ontouchstart' in document.documentElement) {\n      [].concat(...document.body.children).forEach(element => EventHandler.off(element, 'mouseover', noop));\n    }\n\n    this._activeTrigger[TRIGGER_CLICK] = false;\n    this._activeTrigger[TRIGGER_FOCUS] = false;\n    this._activeTrigger[TRIGGER_HOVER] = false;\n    const isAnimated = this.tip.classList.contains(CLASS_NAME_FADE$2);\n\n    this._queueCallback(complete, this.tip, isAnimated);\n\n    this._hoverState = '';\n  }\n\n  update() {\n    if (this._popper !== null) {\n      this._popper.update();\n    }\n  } // Protected\n\n\n  isWithContent() {\n    return Boolean(this.getTitle());\n  }\n\n  getTipElement() {\n    if (this.tip) {\n      return this.tip;\n    }\n\n    const element = document.createElement('div');\n    element.innerHTML = this._config.template;\n    const tip = element.children[0];\n    this.setContent(tip);\n    tip.classList.remove(CLASS_NAME_FADE$2, CLASS_NAME_SHOW$2);\n    this.tip = tip;\n    return this.tip;\n  }\n\n  setContent(tip) {\n    this._sanitizeAndSetContent(tip, this.getTitle(), SELECTOR_TOOLTIP_INNER);\n  }\n\n  _sanitizeAndSetContent(template, content, selector) {\n    const templateElement = SelectorEngine.findOne(selector, template);\n\n    if (!content && templateElement) {\n      templateElement.remove();\n      return;\n    } // we use append for html objects to maintain js events\n\n\n    this.setElementContent(templateElement, content);\n  }\n\n  setElementContent(element, content) {\n    if (element === null) {\n      return;\n    }\n\n    if (isElement(content)) {\n      content = getElement(content); // content is a DOM node or a jQuery\n\n      if (this._config.html) {\n        if (content.parentNode !== element) {\n          element.innerHTML = '';\n          element.append(content);\n        }\n      } else {\n        element.textContent = content.textContent;\n      }\n\n      return;\n    }\n\n    if (this._config.html) {\n      if (this._config.sanitize) {\n        content = sanitizeHtml(content, this._config.allowList, this._config.sanitizeFn);\n      }\n\n      element.innerHTML = content;\n    } else {\n      element.textContent = content;\n    }\n  }\n\n  getTitle() {\n    const title = this._element.getAttribute('data-bs-original-title') || this._config.title;\n\n    return this._resolvePossibleFunction(title);\n  }\n\n  updateAttachment(attachment) {\n    if (attachment === 'right') {\n      return 'end';\n    }\n\n    if (attachment === 'left') {\n      return 'start';\n    }\n\n    return attachment;\n  } // Private\n\n\n  _initializeOnDelegatedTarget(event, context) {\n    return context || this.constructor.getOrCreateInstance(event.delegateTarget, this._getDelegateConfig());\n  }\n\n  _getOffset() {\n    const {\n      offset\n    } = this._config;\n\n    if (typeof offset === 'string') {\n      return offset.split(',').map(val => Number.parseInt(val, 10));\n    }\n\n    if (typeof offset === 'function') {\n      return popperData => offset(popperData, this._element);\n    }\n\n    return offset;\n  }\n\n  _resolvePossibleFunction(content) {\n    return typeof content === 'function' ? content.call(this._element) : content;\n  }\n\n  _getPopperConfig(attachment) {\n    const defaultBsPopperConfig = {\n      placement: attachment,\n      modifiers: [{\n        name: 'flip',\n        options: {\n          fallbackPlacements: this._config.fallbackPlacements\n        }\n      }, {\n        name: 'offset',\n        options: {\n          offset: this._getOffset()\n        }\n      }, {\n        name: 'preventOverflow',\n        options: {\n          boundary: this._config.boundary\n        }\n      }, {\n        name: 'arrow',\n        options: {\n          element: `.${this.constructor.NAME}-arrow`\n        }\n      }, {\n        name: 'onChange',\n        enabled: true,\n        phase: 'afterWrite',\n        fn: data => this._handlePopperPlacementChange(data)\n      }],\n      onFirstUpdate: data => {\n        if (data.options.placement !== data.placement) {\n          this._handlePopperPlacementChange(data);\n        }\n      }\n    };\n    return { ...defaultBsPopperConfig,\n      ...(typeof this._config.popperConfig === 'function' ? this._config.popperConfig(defaultBsPopperConfig) : this._config.popperConfig)\n    };\n  }\n\n  _addAttachmentClass(attachment) {\n    this.getTipElement().classList.add(`${this._getBasicClassPrefix()}-${this.updateAttachment(attachment)}`);\n  }\n\n  _getAttachment(placement) {\n    return AttachmentMap[placement.toUpperCase()];\n  }\n\n  _setListeners() {\n    const triggers = this._config.trigger.split(' ');\n\n    triggers.forEach(trigger => {\n      if (trigger === 'click') {\n        EventHandler.on(this._element, this.constructor.Event.CLICK, this._config.selector, event => this.toggle(event));\n      } else if (trigger !== TRIGGER_MANUAL) {\n        const eventIn = trigger === TRIGGER_HOVER ? this.constructor.Event.MOUSEENTER : this.constructor.Event.FOCUSIN;\n        const eventOut = trigger === TRIGGER_HOVER ? this.constructor.Event.MOUSELEAVE : this.constructor.Event.FOCUSOUT;\n        EventHandler.on(this._element, eventIn, this._config.selector, event => this._enter(event));\n        EventHandler.on(this._element, eventOut, this._config.selector, event => this._leave(event));\n      }\n    });\n\n    this._hideModalHandler = () => {\n      if (this._element) {\n        this.hide();\n      }\n    };\n\n    EventHandler.on(this._element.closest(SELECTOR_MODAL), EVENT_MODAL_HIDE, this._hideModalHandler);\n\n    if (this._config.selector) {\n      this._config = { ...this._config,\n        trigger: 'manual',\n        selector: ''\n      };\n    } else {\n      this._fixTitle();\n    }\n  }\n\n  _fixTitle() {\n    const title = this._element.getAttribute('title');\n\n    const originalTitleType = typeof this._element.getAttribute('data-bs-original-title');\n\n    if (title || originalTitleType !== 'string') {\n      this._element.setAttribute('data-bs-original-title', title || '');\n\n      if (title && !this._element.getAttribute('aria-label') && !this._element.textContent) {\n        this._element.setAttribute('aria-label', title);\n      }\n\n      this._element.setAttribute('title', '');\n    }\n  }\n\n  _enter(event, context) {\n    context = this._initializeOnDelegatedTarget(event, context);\n\n    if (event) {\n      context._activeTrigger[event.type === 'focusin' ? TRIGGER_FOCUS : TRIGGER_HOVER] = true;\n    }\n\n    if (context.getTipElement().classList.contains(CLASS_NAME_SHOW$2) || context._hoverState === HOVER_STATE_SHOW) {\n      context._hoverState = HOVER_STATE_SHOW;\n      return;\n    }\n\n    clearTimeout(context._timeout);\n    context._hoverState = HOVER_STATE_SHOW;\n\n    if (!context._config.delay || !context._config.delay.show) {\n      context.show();\n      return;\n    }\n\n    context._timeout = setTimeout(() => {\n      if (context._hoverState === HOVER_STATE_SHOW) {\n        context.show();\n      }\n    }, context._config.delay.show);\n  }\n\n  _leave(event, context) {\n    context = this._initializeOnDelegatedTarget(event, context);\n\n    if (event) {\n      context._activeTrigger[event.type === 'focusout' ? TRIGGER_FOCUS : TRIGGER_HOVER] = context._element.contains(event.relatedTarget);\n    }\n\n    if (context._isWithActiveTrigger()) {\n      return;\n    }\n\n    clearTimeout(context._timeout);\n    context._hoverState = HOVER_STATE_OUT;\n\n    if (!context._config.delay || !context._config.delay.hide) {\n      context.hide();\n      return;\n    }\n\n    context._timeout = setTimeout(() => {\n      if (context._hoverState === HOVER_STATE_OUT) {\n        context.hide();\n      }\n    }, context._config.delay.hide);\n  }\n\n  _isWithActiveTrigger() {\n    for (const trigger in this._activeTrigger) {\n      if (this._activeTrigger[trigger]) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  _getConfig(config) {\n    const dataAttributes = Manipulator.getDataAttributes(this._element);\n    Object.keys(dataAttributes).forEach(dataAttr => {\n      if (DISALLOWED_ATTRIBUTES.has(dataAttr)) {\n        delete dataAttributes[dataAttr];\n      }\n    });\n    config = { ...this.constructor.Default,\n      ...dataAttributes,\n      ...(typeof config === 'object' && config ? config : {})\n    };\n    config.container = config.container === false ? document.body : getElement(config.container);\n\n    if (typeof config.delay === 'number') {\n      config.delay = {\n        show: config.delay,\n        hide: config.delay\n      };\n    }\n\n    if (typeof config.title === 'number') {\n      config.title = config.title.toString();\n    }\n\n    if (typeof config.content === 'number') {\n      config.content = config.content.toString();\n    }\n\n    typeCheckConfig(NAME$4, config, this.constructor.DefaultType);\n\n    if (config.sanitize) {\n      config.template = sanitizeHtml(config.template, config.allowList, config.sanitizeFn);\n    }\n\n    return config;\n  }\n\n  _getDelegateConfig() {\n    const config = {};\n\n    for (const key in this._config) {\n      if (this.constructor.Default[key] !== this._config[key]) {\n        config[key] = this._config[key];\n      }\n    } // In the future can be replaced with:\n    // const keysWithDifferentValues = Object.entries(this._config).filter(entry => this.constructor.Default[entry[0]] !== this._config[entry[0]])\n    // `Object.fromEntries(keysWithDifferentValues)`\n\n\n    return config;\n  }\n\n  _cleanTipClass() {\n    const tip = this.getTipElement();\n    const basicClassPrefixRegex = new RegExp(`(^|\\\\s)${this._getBasicClassPrefix()}\\\\S+`, 'g');\n    const tabClass = tip.getAttribute('class').match(basicClassPrefixRegex);\n\n    if (tabClass !== null && tabClass.length > 0) {\n      tabClass.map(token => token.trim()).forEach(tClass => tip.classList.remove(tClass));\n    }\n  }\n\n  _getBasicClassPrefix() {\n    return CLASS_PREFIX$1;\n  }\n\n  _handlePopperPlacementChange(popperData) {\n    const {\n      state\n    } = popperData;\n\n    if (!state) {\n      return;\n    }\n\n    this.tip = state.elements.popper;\n\n    this._cleanTipClass();\n\n    this._addAttachmentClass(this._getAttachment(state.placement));\n  }\n\n  _disposePopper() {\n    if (this._popper) {\n      this._popper.destroy();\n\n      this._popper = null;\n    }\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Tooltip.getOrCreateInstance(this, config);\n\n      if (typeof config === 'string') {\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config]();\n      }\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Tooltip to jQuery only if jQuery is present\n */\n\n\ndefineJQueryPlugin(Tooltip);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): popover.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$3 = 'popover';\nconst DATA_KEY$3 = 'bs.popover';\nconst EVENT_KEY$3 = `.${DATA_KEY$3}`;\nconst CLASS_PREFIX = 'bs-popover';\nconst Default$2 = { ...Tooltip.Default,\n  placement: 'right',\n  offset: [0, 8],\n  trigger: 'click',\n  content: '',\n  template: '<div class=\"popover\" role=\"tooltip\">' + '<div class=\"popover-arrow\"></div>' + '<h3 class=\"popover-header\"></h3>' + '<div class=\"popover-body\"></div>' + '</div>'\n};\nconst DefaultType$2 = { ...Tooltip.DefaultType,\n  content: '(string|element|function)'\n};\nconst Event$1 = {\n  HIDE: `hide${EVENT_KEY$3}`,\n  HIDDEN: `hidden${EVENT_KEY$3}`,\n  SHOW: `show${EVENT_KEY$3}`,\n  SHOWN: `shown${EVENT_KEY$3}`,\n  INSERTED: `inserted${EVENT_KEY$3}`,\n  CLICK: `click${EVENT_KEY$3}`,\n  FOCUSIN: `focusin${EVENT_KEY$3}`,\n  FOCUSOUT: `focusout${EVENT_KEY$3}`,\n  MOUSEENTER: `mouseenter${EVENT_KEY$3}`,\n  MOUSELEAVE: `mouseleave${EVENT_KEY$3}`\n};\nconst SELECTOR_TITLE = '.popover-header';\nconst SELECTOR_CONTENT = '.popover-body';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Popover extends Tooltip {\n  // Getters\n  static get Default() {\n    return Default$2;\n  }\n\n  static get NAME() {\n    return NAME$3;\n  }\n\n  static get Event() {\n    return Event$1;\n  }\n\n  static get DefaultType() {\n    return DefaultType$2;\n  } // Overrides\n\n\n  isWithContent() {\n    return this.getTitle() || this._getContent();\n  }\n\n  setContent(tip) {\n    this._sanitizeAndSetContent(tip, this.getTitle(), SELECTOR_TITLE);\n\n    this._sanitizeAndSetContent(tip, this._getContent(), SELECTOR_CONTENT);\n  } // Private\n\n\n  _getContent() {\n    return this._resolvePossibleFunction(this._config.content);\n  }\n\n  _getBasicClassPrefix() {\n    return CLASS_PREFIX;\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Popover.getOrCreateInstance(this, config);\n\n      if (typeof config === 'string') {\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config]();\n      }\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Popover to jQuery only if jQuery is present\n */\n\n\ndefineJQueryPlugin(Popover);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): scrollspy.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$2 = 'scrollspy';\nconst DATA_KEY$2 = 'bs.scrollspy';\nconst EVENT_KEY$2 = `.${DATA_KEY$2}`;\nconst DATA_API_KEY$1 = '.data-api';\nconst Default$1 = {\n  offset: 10,\n  method: 'auto',\n  target: ''\n};\nconst DefaultType$1 = {\n  offset: 'number',\n  method: 'string',\n  target: '(string|element)'\n};\nconst EVENT_ACTIVATE = `activate${EVENT_KEY$2}`;\nconst EVENT_SCROLL = `scroll${EVENT_KEY$2}`;\nconst EVENT_LOAD_DATA_API = `load${EVENT_KEY$2}${DATA_API_KEY$1}`;\nconst CLASS_NAME_DROPDOWN_ITEM = 'dropdown-item';\nconst CLASS_NAME_ACTIVE$1 = 'active';\nconst SELECTOR_DATA_SPY = '[data-bs-spy=\"scroll\"]';\nconst SELECTOR_NAV_LIST_GROUP$1 = '.nav, .list-group';\nconst SELECTOR_NAV_LINKS = '.nav-link';\nconst SELECTOR_NAV_ITEMS = '.nav-item';\nconst SELECTOR_LIST_ITEMS = '.list-group-item';\nconst SELECTOR_LINK_ITEMS = `${SELECTOR_NAV_LINKS}, ${SELECTOR_LIST_ITEMS}, .${CLASS_NAME_DROPDOWN_ITEM}`;\nconst SELECTOR_DROPDOWN$1 = '.dropdown';\nconst SELECTOR_DROPDOWN_TOGGLE$1 = '.dropdown-toggle';\nconst METHOD_OFFSET = 'offset';\nconst METHOD_POSITION = 'position';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass ScrollSpy extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._scrollElement = this._element.tagName === 'BODY' ? window : this._element;\n    this._config = this._getConfig(config);\n    this._offsets = [];\n    this._targets = [];\n    this._activeTarget = null;\n    this._scrollHeight = 0;\n    EventHandler.on(this._scrollElement, EVENT_SCROLL, () => this._process());\n    this.refresh();\n\n    this._process();\n  } // Getters\n\n\n  static get Default() {\n    return Default$1;\n  }\n\n  static get NAME() {\n    return NAME$2;\n  } // Public\n\n\n  refresh() {\n    const autoMethod = this._scrollElement === this._scrollElement.window ? METHOD_OFFSET : METHOD_POSITION;\n    const offsetMethod = this._config.method === 'auto' ? autoMethod : this._config.method;\n    const offsetBase = offsetMethod === METHOD_POSITION ? this._getScrollTop() : 0;\n    this._offsets = [];\n    this._targets = [];\n    this._scrollHeight = this._getScrollHeight();\n    const targets = SelectorEngine.find(SELECTOR_LINK_ITEMS, this._config.target);\n    targets.map(element => {\n      const targetSelector = getSelectorFromElement(element);\n      const target = targetSelector ? SelectorEngine.findOne(targetSelector) : null;\n\n      if (target) {\n        const targetBCR = target.getBoundingClientRect();\n\n        if (targetBCR.width || targetBCR.height) {\n          return [Manipulator[offsetMethod](target).top + offsetBase, targetSelector];\n        }\n      }\n\n      return null;\n    }).filter(item => item).sort((a, b) => a[0] - b[0]).forEach(item => {\n      this._offsets.push(item[0]);\n\n      this._targets.push(item[1]);\n    });\n  }\n\n  dispose() {\n    EventHandler.off(this._scrollElement, EVENT_KEY$2);\n    super.dispose();\n  } // Private\n\n\n  _getConfig(config) {\n    config = { ...Default$1,\n      ...Manipulator.getDataAttributes(this._element),\n      ...(typeof config === 'object' && config ? config : {})\n    };\n    config.target = getElement(config.target) || document.documentElement;\n    typeCheckConfig(NAME$2, config, DefaultType$1);\n    return config;\n  }\n\n  _getScrollTop() {\n    return this._scrollElement === window ? this._scrollElement.pageYOffset : this._scrollElement.scrollTop;\n  }\n\n  _getScrollHeight() {\n    return this._scrollElement.scrollHeight || Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);\n  }\n\n  _getOffsetHeight() {\n    return this._scrollElement === window ? window.innerHeight : this._scrollElement.getBoundingClientRect().height;\n  }\n\n  _process() {\n    const scrollTop = this._getScrollTop() + this._config.offset;\n\n    const scrollHeight = this._getScrollHeight();\n\n    const maxScroll = this._config.offset + scrollHeight - this._getOffsetHeight();\n\n    if (this._scrollHeight !== scrollHeight) {\n      this.refresh();\n    }\n\n    if (scrollTop >= maxScroll) {\n      const target = this._targets[this._targets.length - 1];\n\n      if (this._activeTarget !== target) {\n        this._activate(target);\n      }\n\n      return;\n    }\n\n    if (this._activeTarget && scrollTop < this._offsets[0] && this._offsets[0] > 0) {\n      this._activeTarget = null;\n\n      this._clear();\n\n      return;\n    }\n\n    for (let i = this._offsets.length; i--;) {\n      const isActiveTarget = this._activeTarget !== this._targets[i] && scrollTop >= this._offsets[i] && (typeof this._offsets[i + 1] === 'undefined' || scrollTop < this._offsets[i + 1]);\n\n      if (isActiveTarget) {\n        this._activate(this._targets[i]);\n      }\n    }\n  }\n\n  _activate(target) {\n    this._activeTarget = target;\n\n    this._clear();\n\n    const queries = SELECTOR_LINK_ITEMS.split(',').map(selector => `${selector}[data-bs-target=\"${target}\"],${selector}[href=\"${target}\"]`);\n    const link = SelectorEngine.findOne(queries.join(','), this._config.target);\n    link.classList.add(CLASS_NAME_ACTIVE$1);\n\n    if (link.classList.contains(CLASS_NAME_DROPDOWN_ITEM)) {\n      SelectorEngine.findOne(SELECTOR_DROPDOWN_TOGGLE$1, link.closest(SELECTOR_DROPDOWN$1)).classList.add(CLASS_NAME_ACTIVE$1);\n    } else {\n      SelectorEngine.parents(link, SELECTOR_NAV_LIST_GROUP$1).forEach(listGroup => {\n        // Set triggered links parents as active\n        // With both <ul> and <nav> markup a parent is the previous sibling of any nav ancestor\n        SelectorEngine.prev(listGroup, `${SELECTOR_NAV_LINKS}, ${SELECTOR_LIST_ITEMS}`).forEach(item => item.classList.add(CLASS_NAME_ACTIVE$1)); // Handle special case when .nav-link is inside .nav-item\n\n        SelectorEngine.prev(listGroup, SELECTOR_NAV_ITEMS).forEach(navItem => {\n          SelectorEngine.children(navItem, SELECTOR_NAV_LINKS).forEach(item => item.classList.add(CLASS_NAME_ACTIVE$1));\n        });\n      });\n    }\n\n    EventHandler.trigger(this._scrollElement, EVENT_ACTIVATE, {\n      relatedTarget: target\n    });\n  }\n\n  _clear() {\n    SelectorEngine.find(SELECTOR_LINK_ITEMS, this._config.target).filter(node => node.classList.contains(CLASS_NAME_ACTIVE$1)).forEach(node => node.classList.remove(CLASS_NAME_ACTIVE$1));\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = ScrollSpy.getOrCreateInstance(this, config);\n\n      if (typeof config !== 'string') {\n        return;\n      }\n\n      if (typeof data[config] === 'undefined') {\n        throw new TypeError(`No method named \"${config}\"`);\n      }\n\n      data[config]();\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(window, EVENT_LOAD_DATA_API, () => {\n  SelectorEngine.find(SELECTOR_DATA_SPY).forEach(spy => new ScrollSpy(spy));\n});\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .ScrollSpy to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(ScrollSpy);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): tab.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME$1 = 'tab';\nconst DATA_KEY$1 = 'bs.tab';\nconst EVENT_KEY$1 = `.${DATA_KEY$1}`;\nconst DATA_API_KEY = '.data-api';\nconst EVENT_HIDE$1 = `hide${EVENT_KEY$1}`;\nconst EVENT_HIDDEN$1 = `hidden${EVENT_KEY$1}`;\nconst EVENT_SHOW$1 = `show${EVENT_KEY$1}`;\nconst EVENT_SHOWN$1 = `shown${EVENT_KEY$1}`;\nconst EVENT_CLICK_DATA_API = `click${EVENT_KEY$1}${DATA_API_KEY}`;\nconst CLASS_NAME_DROPDOWN_MENU = 'dropdown-menu';\nconst CLASS_NAME_ACTIVE = 'active';\nconst CLASS_NAME_FADE$1 = 'fade';\nconst CLASS_NAME_SHOW$1 = 'show';\nconst SELECTOR_DROPDOWN = '.dropdown';\nconst SELECTOR_NAV_LIST_GROUP = '.nav, .list-group';\nconst SELECTOR_ACTIVE = '.active';\nconst SELECTOR_ACTIVE_UL = ':scope > li > .active';\nconst SELECTOR_DATA_TOGGLE = '[data-bs-toggle=\"tab\"], [data-bs-toggle=\"pill\"], [data-bs-toggle=\"list\"]';\nconst SELECTOR_DROPDOWN_TOGGLE = '.dropdown-toggle';\nconst SELECTOR_DROPDOWN_ACTIVE_CHILD = ':scope > .dropdown-menu .active';\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Tab extends BaseComponent {\n  // Getters\n  static get NAME() {\n    return NAME$1;\n  } // Public\n\n\n  show() {\n    if (this._element.parentNode && this._element.parentNode.nodeType === Node.ELEMENT_NODE && this._element.classList.contains(CLASS_NAME_ACTIVE)) {\n      return;\n    }\n\n    let previous;\n    const target = getElementFromSelector(this._element);\n\n    const listElement = this._element.closest(SELECTOR_NAV_LIST_GROUP);\n\n    if (listElement) {\n      const itemSelector = listElement.nodeName === 'UL' || listElement.nodeName === 'OL' ? SELECTOR_ACTIVE_UL : SELECTOR_ACTIVE;\n      previous = SelectorEngine.find(itemSelector, listElement);\n      previous = previous[previous.length - 1];\n    }\n\n    const hideEvent = previous ? EventHandler.trigger(previous, EVENT_HIDE$1, {\n      relatedTarget: this._element\n    }) : null;\n    const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$1, {\n      relatedTarget: previous\n    });\n\n    if (showEvent.defaultPrevented || hideEvent !== null && hideEvent.defaultPrevented) {\n      return;\n    }\n\n    this._activate(this._element, listElement);\n\n    const complete = () => {\n      EventHandler.trigger(previous, EVENT_HIDDEN$1, {\n        relatedTarget: this._element\n      });\n      EventHandler.trigger(this._element, EVENT_SHOWN$1, {\n        relatedTarget: previous\n      });\n    };\n\n    if (target) {\n      this._activate(target, target.parentNode, complete);\n    } else {\n      complete();\n    }\n  } // Private\n\n\n  _activate(element, container, callback) {\n    const activeElements = container && (container.nodeName === 'UL' || container.nodeName === 'OL') ? SelectorEngine.find(SELECTOR_ACTIVE_UL, container) : SelectorEngine.children(container, SELECTOR_ACTIVE);\n    const active = activeElements[0];\n    const isTransitioning = callback && active && active.classList.contains(CLASS_NAME_FADE$1);\n\n    const complete = () => this._transitionComplete(element, active, callback);\n\n    if (active && isTransitioning) {\n      active.classList.remove(CLASS_NAME_SHOW$1);\n\n      this._queueCallback(complete, element, true);\n    } else {\n      complete();\n    }\n  }\n\n  _transitionComplete(element, active, callback) {\n    if (active) {\n      active.classList.remove(CLASS_NAME_ACTIVE);\n      const dropdownChild = SelectorEngine.findOne(SELECTOR_DROPDOWN_ACTIVE_CHILD, active.parentNode);\n\n      if (dropdownChild) {\n        dropdownChild.classList.remove(CLASS_NAME_ACTIVE);\n      }\n\n      if (active.getAttribute('role') === 'tab') {\n        active.setAttribute('aria-selected', false);\n      }\n    }\n\n    element.classList.add(CLASS_NAME_ACTIVE);\n\n    if (element.getAttribute('role') === 'tab') {\n      element.setAttribute('aria-selected', true);\n    }\n\n    reflow(element);\n\n    if (element.classList.contains(CLASS_NAME_FADE$1)) {\n      element.classList.add(CLASS_NAME_SHOW$1);\n    }\n\n    let parent = element.parentNode;\n\n    if (parent && parent.nodeName === 'LI') {\n      parent = parent.parentNode;\n    }\n\n    if (parent && parent.classList.contains(CLASS_NAME_DROPDOWN_MENU)) {\n      const dropdownElement = element.closest(SELECTOR_DROPDOWN);\n\n      if (dropdownElement) {\n        SelectorEngine.find(SELECTOR_DROPDOWN_TOGGLE, dropdownElement).forEach(dropdown => dropdown.classList.add(CLASS_NAME_ACTIVE));\n      }\n\n      element.setAttribute('aria-expanded', true);\n    }\n\n    if (callback) {\n      callback();\n    }\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Tab.getOrCreateInstance(this);\n\n      if (typeof config === 'string') {\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config]();\n      }\n    });\n  }\n\n}\n/**\n * ------------------------------------------------------------------------\n * Data Api implementation\n * ------------------------------------------------------------------------\n */\n\n\nEventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_DATA_TOGGLE, function (event) {\n  if (['A', 'AREA'].includes(this.tagName)) {\n    event.preventDefault();\n  }\n\n  if (isDisabled(this)) {\n    return;\n  }\n\n  const data = Tab.getOrCreateInstance(this);\n  data.show();\n});\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Tab to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Tab);\n\n/**\n * --------------------------------------------------------------------------\n * Bootstrap (v5.1.3): toast.js\n * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)\n * --------------------------------------------------------------------------\n */\n/**\n * ------------------------------------------------------------------------\n * Constants\n * ------------------------------------------------------------------------\n */\n\nconst NAME = 'toast';\nconst DATA_KEY = 'bs.toast';\nconst EVENT_KEY = `.${DATA_KEY}`;\nconst EVENT_MOUSEOVER = `mouseover${EVENT_KEY}`;\nconst EVENT_MOUSEOUT = `mouseout${EVENT_KEY}`;\nconst EVENT_FOCUSIN = `focusin${EVENT_KEY}`;\nconst EVENT_FOCUSOUT = `focusout${EVENT_KEY}`;\nconst EVENT_HIDE = `hide${EVENT_KEY}`;\nconst EVENT_HIDDEN = `hidden${EVENT_KEY}`;\nconst EVENT_SHOW = `show${EVENT_KEY}`;\nconst EVENT_SHOWN = `shown${EVENT_KEY}`;\nconst CLASS_NAME_FADE = 'fade';\nconst CLASS_NAME_HIDE = 'hide'; // @deprecated - kept here only for backwards compatibility\n\nconst CLASS_NAME_SHOW = 'show';\nconst CLASS_NAME_SHOWING = 'showing';\nconst DefaultType = {\n  animation: 'boolean',\n  autohide: 'boolean',\n  delay: 'number'\n};\nconst Default = {\n  animation: true,\n  autohide: true,\n  delay: 5000\n};\n/**\n * ------------------------------------------------------------------------\n * Class Definition\n * ------------------------------------------------------------------------\n */\n\nclass Toast extends BaseComponent {\n  constructor(element, config) {\n    super(element);\n    this._config = this._getConfig(config);\n    this._timeout = null;\n    this._hasMouseInteraction = false;\n    this._hasKeyboardInteraction = false;\n\n    this._setListeners();\n  } // Getters\n\n\n  static get DefaultType() {\n    return DefaultType;\n  }\n\n  static get Default() {\n    return Default;\n  }\n\n  static get NAME() {\n    return NAME;\n  } // Public\n\n\n  show() {\n    const showEvent = EventHandler.trigger(this._element, EVENT_SHOW);\n\n    if (showEvent.defaultPrevented) {\n      return;\n    }\n\n    this._clearTimeout();\n\n    if (this._config.animation) {\n      this._element.classList.add(CLASS_NAME_FADE);\n    }\n\n    const complete = () => {\n      this._element.classList.remove(CLASS_NAME_SHOWING);\n\n      EventHandler.trigger(this._element, EVENT_SHOWN);\n\n      this._maybeScheduleHide();\n    };\n\n    this._element.classList.remove(CLASS_NAME_HIDE); // @deprecated\n\n\n    reflow(this._element);\n\n    this._element.classList.add(CLASS_NAME_SHOW);\n\n    this._element.classList.add(CLASS_NAME_SHOWING);\n\n    this._queueCallback(complete, this._element, this._config.animation);\n  }\n\n  hide() {\n    if (!this._element.classList.contains(CLASS_NAME_SHOW)) {\n      return;\n    }\n\n    const hideEvent = EventHandler.trigger(this._element, EVENT_HIDE);\n\n    if (hideEvent.defaultPrevented) {\n      return;\n    }\n\n    const complete = () => {\n      this._element.classList.add(CLASS_NAME_HIDE); // @deprecated\n\n\n      this._element.classList.remove(CLASS_NAME_SHOWING);\n\n      this._element.classList.remove(CLASS_NAME_SHOW);\n\n      EventHandler.trigger(this._element, EVENT_HIDDEN);\n    };\n\n    this._element.classList.add(CLASS_NAME_SHOWING);\n\n    this._queueCallback(complete, this._element, this._config.animation);\n  }\n\n  dispose() {\n    this._clearTimeout();\n\n    if (this._element.classList.contains(CLASS_NAME_SHOW)) {\n      this._element.classList.remove(CLASS_NAME_SHOW);\n    }\n\n    super.dispose();\n  } // Private\n\n\n  _getConfig(config) {\n    config = { ...Default,\n      ...Manipulator.getDataAttributes(this._element),\n      ...(typeof config === 'object' && config ? config : {})\n    };\n    typeCheckConfig(NAME, config, this.constructor.DefaultType);\n    return config;\n  }\n\n  _maybeScheduleHide() {\n    if (!this._config.autohide) {\n      return;\n    }\n\n    if (this._hasMouseInteraction || this._hasKeyboardInteraction) {\n      return;\n    }\n\n    this._timeout = setTimeout(() => {\n      this.hide();\n    }, this._config.delay);\n  }\n\n  _onInteraction(event, isInteracting) {\n    switch (event.type) {\n      case 'mouseover':\n      case 'mouseout':\n        this._hasMouseInteraction = isInteracting;\n        break;\n\n      case 'focusin':\n      case 'focusout':\n        this._hasKeyboardInteraction = isInteracting;\n        break;\n    }\n\n    if (isInteracting) {\n      this._clearTimeout();\n\n      return;\n    }\n\n    const nextElement = event.relatedTarget;\n\n    if (this._element === nextElement || this._element.contains(nextElement)) {\n      return;\n    }\n\n    this._maybeScheduleHide();\n  }\n\n  _setListeners() {\n    EventHandler.on(this._element, EVENT_MOUSEOVER, event => this._onInteraction(event, true));\n    EventHandler.on(this._element, EVENT_MOUSEOUT, event => this._onInteraction(event, false));\n    EventHandler.on(this._element, EVENT_FOCUSIN, event => this._onInteraction(event, true));\n    EventHandler.on(this._element, EVENT_FOCUSOUT, event => this._onInteraction(event, false));\n  }\n\n  _clearTimeout() {\n    clearTimeout(this._timeout);\n    this._timeout = null;\n  } // Static\n\n\n  static jQueryInterface(config) {\n    return this.each(function () {\n      const data = Toast.getOrCreateInstance(this, config);\n\n      if (typeof config === 'string') {\n        if (typeof data[config] === 'undefined') {\n          throw new TypeError(`No method named \"${config}\"`);\n        }\n\n        data[config](this);\n      }\n    });\n  }\n\n}\n\nenableDismissTrigger(Toast);\n/**\n * ------------------------------------------------------------------------\n * jQuery\n * ------------------------------------------------------------------------\n * add .Toast to jQuery only if jQuery is present\n */\n\ndefineJQueryPlugin(Toast);\n\nexport { Alert, Button, Carousel, Collapse, Dropdown, Modal, Offcanvas, Popover, ScrollSpy, Tab, Toast, Tooltip };\n//# sourceMappingURL=bootstrap.esm.js.map\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./sha1\"), require(\"./hmac\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./sha1\", \"./hmac\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var Base = C_lib.Base;\n\t    var WordArray = C_lib.WordArray;\n\t    var C_algo = C.algo;\n\t    var SHA1 = C_algo.SHA1;\n\t    var HMAC = C_algo.HMAC;\n\n\t    /**\n\t     * Password-Based Key Derivation Function 2 algorithm.\n\t     */\n\t    var PBKDF2 = C_algo.PBKDF2 = Base.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {number} keySize The key size in words to generate. Default: 4 (128 bits)\n\t         * @property {Hasher} hasher The hasher to use. Default: SHA1\n\t         * @property {number} iterations The number of iterations to perform. Default: 1\n\t         */\n\t        cfg: Base.extend({\n\t            keySize: 128/32,\n\t            hasher: SHA1,\n\t            iterations: 1\n\t        }),\n\n\t        /**\n\t         * Initializes a newly created key derivation function.\n\t         *\n\t         * @param {Object} cfg (Optional) The configuration options to use for the derivation.\n\t         *\n\t         * @example\n\t         *\n\t         *     var kdf = CryptoJS.algo.PBKDF2.create();\n\t         *     var kdf = CryptoJS.algo.PBKDF2.create({ keySize: 8 });\n\t         *     var kdf = CryptoJS.algo.PBKDF2.create({ keySize: 8, iterations: 1000 });\n\t         */\n\t        init: function (cfg) {\n\t            this.cfg = this.cfg.extend(cfg);\n\t        },\n\n\t        /**\n\t         * Computes the Password-Based Key Derivation Function 2.\n\t         *\n\t         * @param {WordArray|string} password The password.\n\t         * @param {WordArray|string} salt A salt.\n\t         *\n\t         * @return {WordArray} The derived key.\n\t         *\n\t         * @example\n\t         *\n\t         *     var key = kdf.compute(password, salt);\n\t         */\n\t        compute: function (password, salt) {\n\t            // Shortcut\n\t            var cfg = this.cfg;\n\n\t            // Init HMAC\n\t            var hmac = HMAC.create(cfg.hasher, password);\n\n\t            // Initial values\n\t            var derivedKey = WordArray.create();\n\t            var blockIndex = WordArray.create([0x00000001]);\n\n\t            // Shortcuts\n\t            var derivedKeyWords = derivedKey.words;\n\t            var blockIndexWords = blockIndex.words;\n\t            var keySize = cfg.keySize;\n\t            var iterations = cfg.iterations;\n\n\t            // Generate key\n\t            while (derivedKeyWords.length < keySize) {\n\t                var block = hmac.update(salt).finalize(blockIndex);\n\t                hmac.reset();\n\n\t                // Shortcuts\n\t                var blockWords = block.words;\n\t                var blockWordsLength = blockWords.length;\n\n\t                // Iterations\n\t                var intermediate = block;\n\t                for (var i = 1; i < iterations; i++) {\n\t                    intermediate = hmac.finalize(intermediate);\n\t                    hmac.reset();\n\n\t                    // Shortcut\n\t                    var intermediateWords = intermediate.words;\n\n\t                    // XOR intermediate with block\n\t                    for (var j = 0; j < blockWordsLength; j++) {\n\t                        blockWords[j] ^= intermediateWords[j];\n\t                    }\n\t                }\n\n\t                derivedKey.concat(block);\n\t                blockIndexWords[0]++;\n\t            }\n\t            derivedKey.sigBytes = keySize * 4;\n\n\t            return derivedKey;\n\t        }\n\t    });\n\n\t    /**\n\t     * Computes the Password-Based Key Derivation Function 2.\n\t     *\n\t     * @param {WordArray|string} password The password.\n\t     * @param {WordArray|string} salt A salt.\n\t     * @param {Object} cfg (Optional) The configuration options to use for this computation.\n\t     *\n\t     * @return {WordArray} The derived key.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var key = CryptoJS.PBKDF2(password, salt);\n\t     *     var key = CryptoJS.PBKDF2(password, salt, { keySize: 8 });\n\t     *     var key = CryptoJS.PBKDF2(password, salt, { keySize: 8, iterations: 1000 });\n\t     */\n\t    C.PBKDF2 = function (password, salt, cfg) {\n\t        return PBKDF2.create(cfg).compute(password, salt);\n\t    };\n\t}());\n\n\n\treturn CryptoJS.PBKDF2;\n\n}));","var anObject = require('../internals/an-object');\nvar defineProperties = require('../internals/object-define-properties');\nvar enumBugKeys = require('../internals/enum-bug-keys');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar html = require('../internals/html');\nvar documentCreateElement = require('../internals/document-create-element');\nvar sharedKey = require('../internals/shared-key');\n\nvar GT = '>';\nvar LT = '<';\nvar PROTOTYPE = 'prototype';\nvar SCRIPT = 'script';\nvar IE_PROTO = sharedKey('IE_PROTO');\n\nvar EmptyConstructor = function () { /* empty */ };\n\nvar scriptTag = function (content) {\n  return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;\n};\n\n// Create object with fake `null` prototype: use ActiveX Object with cleared prototype\nvar NullProtoObjectViaActiveX = function (activeXDocument) {\n  activeXDocument.write(scriptTag(''));\n  activeXDocument.close();\n  var temp = activeXDocument.parentWindow.Object;\n  activeXDocument = null; // avoid memory leak\n  return temp;\n};\n\n// Create object with fake `null` prototype: use iframe Object with cleared prototype\nvar NullProtoObjectViaIFrame = function () {\n  // Thrash, waste and sodomy: IE GC bug\n  var iframe = documentCreateElement('iframe');\n  var JS = 'java' + SCRIPT + ':';\n  var iframeDocument;\n  iframe.style.display = 'none';\n  html.appendChild(iframe);\n  // https://github.com/zloirock/core-js/issues/475\n  iframe.src = String(JS);\n  iframeDocument = iframe.contentWindow.document;\n  iframeDocument.open();\n  iframeDocument.write(scriptTag('document.F=Object'));\n  iframeDocument.close();\n  return iframeDocument.F;\n};\n\n// Check for document.domain and active x support\n// No need to use active x approach when document.domain is not set\n// see https://github.com/es-shims/es5-shim/issues/150\n// variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346\n// avoid IE GC bug\nvar activeXDocument;\nvar NullProtoObject = function () {\n  try {\n    /* global ActiveXObject -- old IE */\n    activeXDocument = document.domain && new ActiveXObject('htmlfile');\n  } catch (error) { /* ignore */ }\n  NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();\n  var length = enumBugKeys.length;\n  while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];\n  return NullProtoObject();\n};\n\nhiddenKeys[IE_PROTO] = true;\n\n// `Object.create` method\n// https://tc39.es/ecma262/#sec-object.create\nmodule.exports = Object.create || function create(O, Properties) {\n  var result;\n  if (O !== null) {\n    EmptyConstructor[PROTOTYPE] = anObject(O);\n    result = new EmptyConstructor();\n    EmptyConstructor[PROTOTYPE] = null;\n    // add \"__proto__\" for Object.getPrototypeOf polyfill\n    result[IE_PROTO] = O;\n  } else result = NullProtoObject();\n  return Properties === undefined ? result : defineProperties(result, Properties);\n};\n","import { top, left, right, bottom, end } from \"../enums.js\";\nimport getOffsetParent from \"../dom-utils/getOffsetParent.js\";\nimport getWindow from \"../dom-utils/getWindow.js\";\nimport getDocumentElement from \"../dom-utils/getDocumentElement.js\";\nimport getComputedStyle from \"../dom-utils/getComputedStyle.js\";\nimport getBasePlacement from \"../utils/getBasePlacement.js\";\nimport getVariation from \"../utils/getVariation.js\";\nimport { round } from \"../utils/math.js\"; // eslint-disable-next-line import/no-unused-modules\n\nvar unsetSides = {\n  top: 'auto',\n  right: 'auto',\n  bottom: 'auto',\n  left: 'auto'\n}; // Round the offsets to the nearest suitable subpixel based on the DPR.\n// Zooming can change the DPR, but it seems to report a value that will\n// cleanly divide the values into the appropriate subpixels.\n\nfunction roundOffsetsByDPR(_ref) {\n  var x = _ref.x,\n      y = _ref.y;\n  var win = window;\n  var dpr = win.devicePixelRatio || 1;\n  return {\n    x: round(x * dpr) / dpr || 0,\n    y: round(y * dpr) / dpr || 0\n  };\n}\n\nexport function mapToStyles(_ref2) {\n  var _Object$assign2;\n\n  var popper = _ref2.popper,\n      popperRect = _ref2.popperRect,\n      placement = _ref2.placement,\n      variation = _ref2.variation,\n      offsets = _ref2.offsets,\n      position = _ref2.position,\n      gpuAcceleration = _ref2.gpuAcceleration,\n      adaptive = _ref2.adaptive,\n      roundOffsets = _ref2.roundOffsets,\n      isFixed = _ref2.isFixed;\n  var _offsets$x = offsets.x,\n      x = _offsets$x === void 0 ? 0 : _offsets$x,\n      _offsets$y = offsets.y,\n      y = _offsets$y === void 0 ? 0 : _offsets$y;\n\n  var _ref3 = typeof roundOffsets === 'function' ? roundOffsets({\n    x: x,\n    y: y\n  }) : {\n    x: x,\n    y: y\n  };\n\n  x = _ref3.x;\n  y = _ref3.y;\n  var hasX = offsets.hasOwnProperty('x');\n  var hasY = offsets.hasOwnProperty('y');\n  var sideX = left;\n  var sideY = top;\n  var win = window;\n\n  if (adaptive) {\n    var offsetParent = getOffsetParent(popper);\n    var heightProp = 'clientHeight';\n    var widthProp = 'clientWidth';\n\n    if (offsetParent === getWindow(popper)) {\n      offsetParent = getDocumentElement(popper);\n\n      if (getComputedStyle(offsetParent).position !== 'static' && position === 'absolute') {\n        heightProp = 'scrollHeight';\n        widthProp = 'scrollWidth';\n      }\n    } // $FlowFixMe[incompatible-cast]: force type refinement, we compare offsetParent with window above, but Flow doesn't detect it\n\n\n    offsetParent = offsetParent;\n\n    if (placement === top || (placement === left || placement === right) && variation === end) {\n      sideY = bottom;\n      var offsetY = isFixed && offsetParent === win && win.visualViewport ? win.visualViewport.height : // $FlowFixMe[prop-missing]\n      offsetParent[heightProp];\n      y -= offsetY - popperRect.height;\n      y *= gpuAcceleration ? 1 : -1;\n    }\n\n    if (placement === left || (placement === top || placement === bottom) && variation === end) {\n      sideX = right;\n      var offsetX = isFixed && offsetParent === win && win.visualViewport ? win.visualViewport.width : // $FlowFixMe[prop-missing]\n      offsetParent[widthProp];\n      x -= offsetX - popperRect.width;\n      x *= gpuAcceleration ? 1 : -1;\n    }\n  }\n\n  var commonStyles = Object.assign({\n    position: position\n  }, adaptive && unsetSides);\n\n  var _ref4 = roundOffsets === true ? roundOffsetsByDPR({\n    x: x,\n    y: y\n  }) : {\n    x: x,\n    y: y\n  };\n\n  x = _ref4.x;\n  y = _ref4.y;\n\n  if (gpuAcceleration) {\n    var _Object$assign;\n\n    return Object.assign({}, commonStyles, (_Object$assign = {}, _Object$assign[sideY] = hasY ? '0' : '', _Object$assign[sideX] = hasX ? '0' : '', _Object$assign.transform = (win.devicePixelRatio || 1) <= 1 ? \"translate(\" + x + \"px, \" + y + \"px)\" : \"translate3d(\" + x + \"px, \" + y + \"px, 0)\", _Object$assign));\n  }\n\n  return Object.assign({}, commonStyles, (_Object$assign2 = {}, _Object$assign2[sideY] = hasY ? y + \"px\" : '', _Object$assign2[sideX] = hasX ? x + \"px\" : '', _Object$assign2.transform = '', _Object$assign2));\n}\n\nfunction computeStyles(_ref5) {\n  var state = _ref5.state,\n      options = _ref5.options;\n  var _options$gpuAccelerat = options.gpuAcceleration,\n      gpuAcceleration = _options$gpuAccelerat === void 0 ? true : _options$gpuAccelerat,\n      _options$adaptive = options.adaptive,\n      adaptive = _options$adaptive === void 0 ? true : _options$adaptive,\n      _options$roundOffsets = options.roundOffsets,\n      roundOffsets = _options$roundOffsets === void 0 ? true : _options$roundOffsets;\n\n  if (process.env.NODE_ENV !== \"production\") {\n    var transitionProperty = getComputedStyle(state.elements.popper).transitionProperty || '';\n\n    if (adaptive && ['transform', 'top', 'right', 'bottom', 'left'].some(function (property) {\n      return transitionProperty.indexOf(property) >= 0;\n    })) {\n      console.warn(['Popper: Detected CSS transitions on at least one of the following', 'CSS properties: \"transform\", \"top\", \"right\", \"bottom\", \"left\".', '\\n\\n', 'Disable the \"computeStyles\" modifier\\'s `adaptive` option to allow', 'for smooth transitions, or remove these properties from the CSS', 'transition declaration on the popper element if only transitioning', 'opacity or background-color for example.', '\\n\\n', 'We recommend using the popper element as a wrapper around an inner', 'element that can have any CSS property transitioned for animations.'].join(' '));\n    }\n  }\n\n  var commonStyles = {\n    placement: getBasePlacement(state.placement),\n    variation: getVariation(state.placement),\n    popper: state.elements.popper,\n    popperRect: state.rects.popper,\n    gpuAcceleration: gpuAcceleration,\n    isFixed: state.options.strategy === 'fixed'\n  };\n\n  if (state.modifiersData.popperOffsets != null) {\n    state.styles.popper = Object.assign({}, state.styles.popper, mapToStyles(Object.assign({}, commonStyles, {\n      offsets: state.modifiersData.popperOffsets,\n      position: state.options.strategy,\n      adaptive: adaptive,\n      roundOffsets: roundOffsets\n    })));\n  }\n\n  if (state.modifiersData.arrow != null) {\n    state.styles.arrow = Object.assign({}, state.styles.arrow, mapToStyles(Object.assign({}, commonStyles, {\n      offsets: state.modifiersData.arrow,\n      position: 'absolute',\n      adaptive: false,\n      roundOffsets: roundOffsets\n    })));\n  }\n\n  state.attributes.popper = Object.assign({}, state.attributes.popper, {\n    'data-popper-placement': state.placement\n  });\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'computeStyles',\n  enabled: true,\n  phase: 'beforeWrite',\n  fn: computeStyles,\n  data: {}\n};","var MAX_ALLOC = Math.pow(2, 30) - 1 // default in iojs\n\nmodule.exports = function (iterations, keylen) {\n  if (typeof iterations !== 'number') {\n    throw new TypeError('Iterations not a number')\n  }\n\n  if (iterations < 0) {\n    throw new TypeError('Bad iterations')\n  }\n\n  if (typeof keylen !== 'number') {\n    throw new TypeError('Key length not a number')\n  }\n\n  if (keylen < 0 || keylen > MAX_ALLOC || keylen !== keylen) { /* eslint no-self-compare: 0 */\n    throw new TypeError('Bad key length')\n  }\n}\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\n/*<replacement>*/\n\nvar Buffer = require('safe-buffer').Buffer;\n/*</replacement>*/\n\nvar isEncoding = Buffer.isEncoding || function (encoding) {\n  encoding = '' + encoding;\n  switch (encoding && encoding.toLowerCase()) {\n    case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':\n      return true;\n    default:\n      return false;\n  }\n};\n\nfunction _normalizeEncoding(enc) {\n  if (!enc) return 'utf8';\n  var retried;\n  while (true) {\n    switch (enc) {\n      case 'utf8':\n      case 'utf-8':\n        return 'utf8';\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return 'utf16le';\n      case 'latin1':\n      case 'binary':\n        return 'latin1';\n      case 'base64':\n      case 'ascii':\n      case 'hex':\n        return enc;\n      default:\n        if (retried) return; // undefined\n        enc = ('' + enc).toLowerCase();\n        retried = true;\n    }\n  }\n};\n\n// Do not cache `Buffer.isEncoding` when checking encoding names as some\n// modules monkey-patch it to support additional encodings\nfunction normalizeEncoding(enc) {\n  var nenc = _normalizeEncoding(enc);\n  if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);\n  return nenc || enc;\n}\n\n// StringDecoder provides an interface for efficiently splitting a series of\n// buffers into a series of JS strings without breaking apart multi-byte\n// characters.\nexports.StringDecoder = StringDecoder;\nfunction StringDecoder(encoding) {\n  this.encoding = normalizeEncoding(encoding);\n  var nb;\n  switch (this.encoding) {\n    case 'utf16le':\n      this.text = utf16Text;\n      this.end = utf16End;\n      nb = 4;\n      break;\n    case 'utf8':\n      this.fillLast = utf8FillLast;\n      nb = 4;\n      break;\n    case 'base64':\n      this.text = base64Text;\n      this.end = base64End;\n      nb = 3;\n      break;\n    default:\n      this.write = simpleWrite;\n      this.end = simpleEnd;\n      return;\n  }\n  this.lastNeed = 0;\n  this.lastTotal = 0;\n  this.lastChar = Buffer.allocUnsafe(nb);\n}\n\nStringDecoder.prototype.write = function (buf) {\n  if (buf.length === 0) return '';\n  var r;\n  var i;\n  if (this.lastNeed) {\n    r = this.fillLast(buf);\n    if (r === undefined) return '';\n    i = this.lastNeed;\n    this.lastNeed = 0;\n  } else {\n    i = 0;\n  }\n  if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);\n  return r || '';\n};\n\nStringDecoder.prototype.end = utf8End;\n\n// Returns only complete characters in a Buffer\nStringDecoder.prototype.text = utf8Text;\n\n// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer\nStringDecoder.prototype.fillLast = function (buf) {\n  if (this.lastNeed <= buf.length) {\n    buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);\n    return this.lastChar.toString(this.encoding, 0, this.lastTotal);\n  }\n  buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);\n  this.lastNeed -= buf.length;\n};\n\n// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a\n// continuation byte. If an invalid byte is detected, -2 is returned.\nfunction utf8CheckByte(byte) {\n  if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;\n  return byte >> 6 === 0x02 ? -1 : -2;\n}\n\n// Checks at most 3 bytes at the end of a Buffer in order to detect an\n// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)\n// needed to complete the UTF-8 character (if applicable) are returned.\nfunction utf8CheckIncomplete(self, buf, i) {\n  var j = buf.length - 1;\n  if (j < i) return 0;\n  var nb = utf8CheckByte(buf[j]);\n  if (nb >= 0) {\n    if (nb > 0) self.lastNeed = nb - 1;\n    return nb;\n  }\n  if (--j < i || nb === -2) return 0;\n  nb = utf8CheckByte(buf[j]);\n  if (nb >= 0) {\n    if (nb > 0) self.lastNeed = nb - 2;\n    return nb;\n  }\n  if (--j < i || nb === -2) return 0;\n  nb = utf8CheckByte(buf[j]);\n  if (nb >= 0) {\n    if (nb > 0) {\n      if (nb === 2) nb = 0;else self.lastNeed = nb - 3;\n    }\n    return nb;\n  }\n  return 0;\n}\n\n// Validates as many continuation bytes for a multi-byte UTF-8 character as\n// needed or are available. If we see a non-continuation byte where we expect\n// one, we \"replace\" the validated continuation bytes we've seen so far with\n// a single UTF-8 replacement character ('\\ufffd'), to match v8's UTF-8 decoding\n// behavior. The continuation byte check is included three times in the case\n// where all of the continuation bytes for a character exist in the same buffer.\n// It is also done this way as a slight performance increase instead of using a\n// loop.\nfunction utf8CheckExtraBytes(self, buf, p) {\n  if ((buf[0] & 0xC0) !== 0x80) {\n    self.lastNeed = 0;\n    return '\\ufffd';\n  }\n  if (self.lastNeed > 1 && buf.length > 1) {\n    if ((buf[1] & 0xC0) !== 0x80) {\n      self.lastNeed = 1;\n      return '\\ufffd';\n    }\n    if (self.lastNeed > 2 && buf.length > 2) {\n      if ((buf[2] & 0xC0) !== 0x80) {\n        self.lastNeed = 2;\n        return '\\ufffd';\n      }\n    }\n  }\n}\n\n// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.\nfunction utf8FillLast(buf) {\n  var p = this.lastTotal - this.lastNeed;\n  var r = utf8CheckExtraBytes(this, buf, p);\n  if (r !== undefined) return r;\n  if (this.lastNeed <= buf.length) {\n    buf.copy(this.lastChar, p, 0, this.lastNeed);\n    return this.lastChar.toString(this.encoding, 0, this.lastTotal);\n  }\n  buf.copy(this.lastChar, p, 0, buf.length);\n  this.lastNeed -= buf.length;\n}\n\n// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a\n// partial character, the character's bytes are buffered until the required\n// number of bytes are available.\nfunction utf8Text(buf, i) {\n  var total = utf8CheckIncomplete(this, buf, i);\n  if (!this.lastNeed) return buf.toString('utf8', i);\n  this.lastTotal = total;\n  var end = buf.length - (total - this.lastNeed);\n  buf.copy(this.lastChar, 0, end);\n  return buf.toString('utf8', i, end);\n}\n\n// For UTF-8, a replacement character is added when ending on a partial\n// character.\nfunction utf8End(buf) {\n  var r = buf && buf.length ? this.write(buf) : '';\n  if (this.lastNeed) return r + '\\ufffd';\n  return r;\n}\n\n// UTF-16LE typically needs two bytes per character, but even if we have an even\n// number of bytes available, we need to check if we end on a leading/high\n// surrogate. In that case, we need to wait for the next two bytes in order to\n// decode the last character properly.\nfunction utf16Text(buf, i) {\n  if ((buf.length - i) % 2 === 0) {\n    var r = buf.toString('utf16le', i);\n    if (r) {\n      var c = r.charCodeAt(r.length - 1);\n      if (c >= 0xD800 && c <= 0xDBFF) {\n        this.lastNeed = 2;\n        this.lastTotal = 4;\n        this.lastChar[0] = buf[buf.length - 2];\n        this.lastChar[1] = buf[buf.length - 1];\n        return r.slice(0, -1);\n      }\n    }\n    return r;\n  }\n  this.lastNeed = 1;\n  this.lastTotal = 2;\n  this.lastChar[0] = buf[buf.length - 1];\n  return buf.toString('utf16le', i, buf.length - 1);\n}\n\n// For UTF-16LE we do not explicitly append special replacement characters if we\n// end on a partial character, we simply let v8 handle that.\nfunction utf16End(buf) {\n  var r = buf && buf.length ? this.write(buf) : '';\n  if (this.lastNeed) {\n    var end = this.lastTotal - this.lastNeed;\n    return r + this.lastChar.toString('utf16le', 0, end);\n  }\n  return r;\n}\n\nfunction base64Text(buf, i) {\n  var n = (buf.length - i) % 3;\n  if (n === 0) return buf.toString('base64', i);\n  this.lastNeed = 3 - n;\n  this.lastTotal = 3;\n  if (n === 1) {\n    this.lastChar[0] = buf[buf.length - 1];\n  } else {\n    this.lastChar[0] = buf[buf.length - 2];\n    this.lastChar[1] = buf[buf.length - 1];\n  }\n  return buf.toString('base64', i, buf.length - n);\n}\n\nfunction base64End(buf) {\n  var r = buf && buf.length ? this.write(buf) : '';\n  if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);\n  return r;\n}\n\n// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)\nfunction simpleWrite(buf) {\n  return buf.toString(this.encoding);\n}\n\nfunction simpleEnd(buf) {\n  return buf && buf.length ? this.write(buf) : '';\n}","var hash = exports;\n\nhash.utils = require('./hash/utils');\nhash.common = require('./hash/common');\nhash.sha = require('./hash/sha');\nhash.ripemd = require('./hash/ripemd');\nhash.hmac = require('./hash/hmac');\n\n// Proxy hash functions to the main object\nhash.sha1 = hash.sha.sha1;\nhash.sha256 = hash.sha.sha256;\nhash.sha224 = hash.sha.sha224;\nhash.sha384 = hash.sha.sha384;\nhash.sha512 = hash.sha.sha512;\nhash.ripemd160 = hash.ripemd.ripemd160;\n","'use strict';\nvar $ = require('../internals/export');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar setPrototypeOf = require('../internals/object-set-prototype-of');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\nvar Iterators = require('../internals/iterators');\nvar IteratorsCore = require('../internals/iterators-core');\n\nvar IteratorPrototype = IteratorsCore.IteratorPrototype;\nvar BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;\nvar ITERATOR = wellKnownSymbol('iterator');\nvar KEYS = 'keys';\nvar VALUES = 'values';\nvar ENTRIES = 'entries';\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {\n  createIteratorConstructor(IteratorConstructor, NAME, next);\n\n  var getIterationMethod = function (KIND) {\n    if (KIND === DEFAULT && defaultIterator) return defaultIterator;\n    if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];\n    switch (KIND) {\n      case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };\n      case VALUES: return function values() { return new IteratorConstructor(this, KIND); };\n      case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };\n    } return function () { return new IteratorConstructor(this); };\n  };\n\n  var TO_STRING_TAG = NAME + ' Iterator';\n  var INCORRECT_VALUES_NAME = false;\n  var IterablePrototype = Iterable.prototype;\n  var nativeIterator = IterablePrototype[ITERATOR]\n    || IterablePrototype['@@iterator']\n    || DEFAULT && IterablePrototype[DEFAULT];\n  var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);\n  var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;\n  var CurrentIteratorPrototype, methods, KEY;\n\n  // fix native\n  if (anyNativeIterator) {\n    CurrentIteratorPrototype = getPrototypeOf(anyNativeIterator.call(new Iterable()));\n    if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {\n      if (!IS_PURE && getPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype) {\n        if (setPrototypeOf) {\n          setPrototypeOf(CurrentIteratorPrototype, IteratorPrototype);\n        } else if (typeof CurrentIteratorPrototype[ITERATOR] != 'function') {\n          createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR, returnThis);\n        }\n      }\n      // Set @@toStringTag to native iterators\n      setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true, true);\n      if (IS_PURE) Iterators[TO_STRING_TAG] = returnThis;\n    }\n  }\n\n  // fix Array#{values, @@iterator}.name in V8 / FF\n  if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {\n    INCORRECT_VALUES_NAME = true;\n    defaultIterator = function values() { return nativeIterator.call(this); };\n  }\n\n  // define iterator\n  if ((!IS_PURE || FORCED) && IterablePrototype[ITERATOR] !== defaultIterator) {\n    createNonEnumerableProperty(IterablePrototype, ITERATOR, defaultIterator);\n  }\n  Iterators[NAME] = defaultIterator;\n\n  // export additional methods\n  if (DEFAULT) {\n    methods = {\n      values: getIterationMethod(VALUES),\n      keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),\n      entries: getIterationMethod(ENTRIES)\n    };\n    if (FORCED) for (KEY in methods) {\n      if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {\n        redefine(IterablePrototype, KEY, methods[KEY]);\n      }\n    } else $({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);\n  }\n\n  return methods;\n};\n","/*\n * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined\n * in FIPS PUB 180-1\n * Version 2.1a Copyright Paul Johnston 2000 - 2002.\n * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet\n * Distributed under the BSD License\n * See http://pajhome.org.uk/crypt/md5 for details.\n */\n\nvar inherits = require('inherits')\nvar Hash = require('./hash')\nvar Buffer = require('safe-buffer').Buffer\n\nvar K = [\n  0x5a827999, 0x6ed9eba1, 0x8f1bbcdc | 0, 0xca62c1d6 | 0\n]\n\nvar W = new Array(80)\n\nfunction Sha1 () {\n  this.init()\n  this._w = W\n\n  Hash.call(this, 64, 56)\n}\n\ninherits(Sha1, Hash)\n\nSha1.prototype.init = function () {\n  this._a = 0x67452301\n  this._b = 0xefcdab89\n  this._c = 0x98badcfe\n  this._d = 0x10325476\n  this._e = 0xc3d2e1f0\n\n  return this\n}\n\nfunction rotl1 (num) {\n  return (num << 1) | (num >>> 31)\n}\n\nfunction rotl5 (num) {\n  return (num << 5) | (num >>> 27)\n}\n\nfunction rotl30 (num) {\n  return (num << 30) | (num >>> 2)\n}\n\nfunction ft (s, b, c, d) {\n  if (s === 0) return (b & c) | ((~b) & d)\n  if (s === 2) return (b & c) | (b & d) | (c & d)\n  return b ^ c ^ d\n}\n\nSha1.prototype._update = function (M) {\n  var W = this._w\n\n  var a = this._a | 0\n  var b = this._b | 0\n  var c = this._c | 0\n  var d = this._d | 0\n  var e = this._e | 0\n\n  for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)\n  for (; i < 80; ++i) W[i] = rotl1(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16])\n\n  for (var j = 0; j < 80; ++j) {\n    var s = ~~(j / 20)\n    var t = (rotl5(a) + ft(s, b, c, d) + e + W[j] + K[s]) | 0\n\n    e = d\n    d = c\n    c = rotl30(b)\n    b = a\n    a = t\n  }\n\n  this._a = (a + this._a) | 0\n  this._b = (b + this._b) | 0\n  this._c = (c + this._c) | 0\n  this._d = (d + this._d) | 0\n  this._e = (e + this._e) | 0\n}\n\nSha1.prototype._hash = function () {\n  var H = Buffer.allocUnsafe(20)\n\n  H.writeInt32BE(this._a | 0, 0)\n  H.writeInt32BE(this._b | 0, 4)\n  H.writeInt32BE(this._c | 0, 8)\n  H.writeInt32BE(this._d | 0, 12)\n  H.writeInt32BE(this._e | 0, 16)\n\n  return H\n}\n\nmodule.exports = Sha1\n","var\n  ONE_SECOND_IN_TS = 90000, // 90kHz clock\n  secondsToVideoTs,\n  secondsToAudioTs,\n  videoTsToSeconds,\n  audioTsToSeconds,\n  audioTsToVideoTs,\n  videoTsToAudioTs;\n\nsecondsToVideoTs = function(seconds) {\n  return seconds * ONE_SECOND_IN_TS;\n};\n\nsecondsToAudioTs = function(seconds, sampleRate) {\n  return seconds * sampleRate;\n};\n\nvideoTsToSeconds = function(timestamp) {\n  return timestamp / ONE_SECOND_IN_TS;\n};\n\naudioTsToSeconds = function(timestamp, sampleRate) {\n  return timestamp / sampleRate;\n};\n\naudioTsToVideoTs = function(timestamp, sampleRate) {\n  return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n};\n\nvideoTsToAudioTs = function(timestamp, sampleRate) {\n  return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n};\n\nmodule.exports = {\n  secondsToVideoTs: secondsToVideoTs,\n  secondsToAudioTs: secondsToAudioTs,\n  videoTsToSeconds: videoTsToSeconds,\n  audioTsToSeconds: audioTsToSeconds,\n  audioTsToVideoTs: audioTsToVideoTs,\n  videoTsToAudioTs: videoTsToAudioTs\n};\n","module.exports = function(module) {\n\tif (!module.webpackPolyfill) {\n\t\tmodule.deprecate = function() {};\n\t\tmodule.paths = [];\n\t\t// module.parent = undefined by default\n\t\tif (!module.children) module.children = [];\n\t\tObject.defineProperty(module, \"loaded\", {\n\t\t\tenumerable: true,\n\t\t\tget: function() {\n\t\t\t\treturn module.l;\n\t\t\t}\n\t\t});\n\t\tObject.defineProperty(module, \"id\", {\n\t\t\tenumerable: true,\n\t\t\tget: function() {\n\t\t\t\treturn module.i;\n\t\t\t}\n\t\t});\n\t\tmodule.webpackPolyfill = 1;\n\t}\n\treturn module;\n};\n","import { isShadowRoot } from \"./instanceOf.js\";\nexport default function contains(parent, child) {\n  var rootNode = child.getRootNode && child.getRootNode(); // First, attempt with faster native method\n\n  if (parent.contains(child)) {\n    return true;\n  } // then fallback to custom implementation with Shadow DOM support\n  else if (rootNode && isShadowRoot(rootNode)) {\n      var next = child;\n\n      do {\n        if (next && parent.isSameNode(next)) {\n          return true;\n        } // $FlowFixMe[prop-missing]: need a better way to handle this...\n\n\n        next = next.parentNode || next.host;\n      } while (next);\n    } // Give up, the result is false\n\n\n  return false;\n}","'use strict';\n\nconst asn1 = exports;\n\nasn1.bignum = require('bn.js');\n\nasn1.define = require('./asn1/api').define;\nasn1.base = require('./asn1/base');\nasn1.constants = require('./asn1/constants');\nasn1.decoders = require('./asn1/decoders');\nasn1.encoders = require('./asn1/encoders');\n","var global = require('../internals/global');\nvar inspectSource = require('../internals/inspect-source');\n\nvar WeakMap = global.WeakMap;\n\nmodule.exports = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));\n","/**\n * @file videojs-contrib-media-sources.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _flashMediaSource = require('./flash-media-source');\n\nvar _flashMediaSource2 = _interopRequireDefault(_flashMediaSource);\n\nvar _htmlMediaSource = require('./html-media-source');\n\nvar _htmlMediaSource2 = _interopRequireDefault(_htmlMediaSource);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar urlCount = 0;\n\n// ------------\n// Media Source\n// ------------\n\nvar defaults = {\n  // how to determine the MediaSource implementation to use. There\n  // are three available modes:\n  // - auto: use native MediaSources where available and Flash\n  //   everywhere else\n  // - html5: always use native MediaSources\n  // - flash: always use the Flash MediaSource polyfill\n  mode: 'auto'\n};\n\n// store references to the media sources so they can be connected\n// to a video element (a swf object)\n// TODO: can we store this somewhere local to this module?\n_videoJs2['default'].mediaSources = {};\n\n/**\n * Provide a method for a swf object to notify JS that a\n * media source is now open.\n *\n * @param {String} msObjectURL string referencing the MSE Object URL\n * @param {String} swfId the swf id\n */\nvar open = function open(msObjectURL, swfId) {\n  var mediaSource = _videoJs2['default'].mediaSources[msObjectURL];\n\n  if (mediaSource) {\n    mediaSource.trigger({ type: 'sourceopen', swfId: swfId });\n  } else {\n    throw new Error('Media Source not found (Video.js)');\n  }\n};\n\n/**\n * Check to see if the native MediaSource object exists and supports\n * an MP4 container with both H.264 video and AAC-LC audio.\n *\n * @return {Boolean} if  native media sources are supported\n */\nvar supportsNativeMediaSources = function supportsNativeMediaSources() {\n  return !!_globalWindow2['default'].MediaSource && !!_globalWindow2['default'].MediaSource.isTypeSupported && _globalWindow2['default'].MediaSource.isTypeSupported('video/mp4;codecs=\"avc1.4d400d,mp4a.40.2\"');\n};\n\n/**\n * An emulation of the MediaSource API so that we can support\n * native and non-native functionality such as flash and\n * video/mp2t videos. returns an instance of HtmlMediaSource or\n * FlashMediaSource depending on what is supported and what options\n * are passed in.\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/MediaSource\n * @param {Object} options options to use during setup.\n */\nvar MediaSource = function MediaSource(options) {\n  var settings = _videoJs2['default'].mergeOptions(defaults, options);\n\n  this.MediaSource = {\n    open: open,\n    supportsNativeMediaSources: supportsNativeMediaSources\n  };\n\n  // determine whether HTML MediaSources should be used\n  if (settings.mode === 'html5' || settings.mode === 'auto' && supportsNativeMediaSources()) {\n    return new _htmlMediaSource2['default']();\n  } else if (_videoJs2['default'].getTech('Flash')) {\n    return new _flashMediaSource2['default']();\n  }\n\n  throw new Error('Cannot use Flash or Html5 to create a MediaSource for this video');\n};\n\nexports.MediaSource = MediaSource;\nMediaSource.open = open;\nMediaSource.supportsNativeMediaSources = supportsNativeMediaSources;\n\n/**\n * A wrapper around the native URL for our MSE object\n * implementation, this object is exposed under videojs.URL\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/URL\n */\nvar URL = {\n  /**\n   * A wrapper around the native createObjectURL for our objects.\n   * This function maps a native or emulated mediaSource to a blob\n   * url so that it can be loaded into video.js\n   *\n   * @link https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL\n   * @param {MediaSource} object the object to create a blob url to\n   */\n  createObjectURL: function createObjectURL(object) {\n    var objectUrlPrefix = 'blob:vjs-media-source/';\n    var url = undefined;\n\n    // use the native MediaSource to generate an object URL\n    if (object instanceof _htmlMediaSource2['default']) {\n      url = _globalWindow2['default'].URL.createObjectURL(object.nativeMediaSource_);\n      object.url_ = url;\n      return url;\n    }\n    // if the object isn't an emulated MediaSource, delegate to the\n    // native implementation\n    if (!(object instanceof _flashMediaSource2['default'])) {\n      url = _globalWindow2['default'].URL.createObjectURL(object);\n      object.url_ = url;\n      return url;\n    }\n\n    // build a URL that can be used to map back to the emulated\n    // MediaSource\n    url = objectUrlPrefix + urlCount;\n\n    urlCount++;\n\n    // setup the mapping back to object\n    _videoJs2['default'].mediaSources[url] = object;\n\n    return url;\n  }\n};\n\nexports.URL = URL;\n_videoJs2['default'].MediaSource = MediaSource;\n_videoJs2['default'].URL = URL;","'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _binUtils = require('./bin-utils');\n\nvar REQUEST_ERRORS = {\n  FAILURE: 2,\n  TIMEOUT: -101,\n  ABORTED: -102\n};\n\nexports.REQUEST_ERRORS = REQUEST_ERRORS;\n/**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n *                             of a byte-range\n */\nvar byterangeStr = function byterangeStr(byterange) {\n  var byterangeStart = undefined;\n  var byterangeEnd = undefined;\n\n  // `byterangeEnd` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  byterangeEnd = byterange.offset + byterange.length - 1;\n  byterangeStart = byterange.offset;\n  return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n};\n\n/**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n */\nvar segmentXhrHeaders = function segmentXhrHeaders(segment) {\n  var headers = {};\n\n  if (segment.byterange) {\n    headers.Range = byterangeStr(segment.byterange);\n  }\n  return headers;\n};\n\n/**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\nvar abortAll = function abortAll(activeXhrs) {\n  activeXhrs.forEach(function (xhr) {\n    xhr.abort();\n  });\n};\n\n/**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\nvar getRequestStats = function getRequestStats(request) {\n  return {\n    bandwidth: request.bandwidth,\n    bytesReceived: request.bytesReceived || 0,\n    roundTripTime: request.roundTripTime || 0\n  };\n};\n\n/**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\nvar getProgressStats = function getProgressStats(progressEvent) {\n  var request = progressEvent.target;\n  var roundTripTime = Date.now() - request.requestTime;\n  var stats = {\n    bandwidth: Infinity,\n    bytesReceived: 0,\n    roundTripTime: roundTripTime || 0\n  };\n\n  stats.bytesReceived = progressEvent.loaded;\n  // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n  // because we should only use bandwidth stats on progress to determine when\n  // abort a request early due to insufficient bandwidth\n  stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n\n  return stats;\n};\n\n/**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request -  the XHR request that possibly generated the error\n */\nvar handleErrors = function handleErrors(error, request) {\n  if (request.timedout) {\n    return {\n      status: request.status,\n      message: 'HLS request timed-out at URL: ' + request.uri,\n      code: REQUEST_ERRORS.TIMEOUT,\n      xhr: request\n    };\n  }\n\n  if (request.aborted) {\n    return {\n      status: request.status,\n      message: 'HLS request aborted at URL: ' + request.uri,\n      code: REQUEST_ERRORS.ABORTED,\n      xhr: request\n    };\n  }\n\n  if (error) {\n    return {\n      status: request.status,\n      message: 'HLS request errored at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  return null;\n};\n\n/**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\nvar handleKeyResponse = function handleKeyResponse(segment, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    if (response.byteLength !== 16) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Invalid HLS key at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    var view = new DataView(response);\n\n    segment.key.bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n    return finishProcessingFn(null, segment);\n  };\n};\n\n/**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\nvar handleInitSegmentResponse = function handleInitSegmentResponse(segment, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    // stop processing if received empty content\n    if (response.byteLength === 0) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Empty HLS segment content at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    segment.map.bytes = new Uint8Array(request.response);\n    return finishProcessingFn(null, segment);\n  };\n};\n\n/**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\nvar handleSegmentResponse = function handleSegmentResponse(segment, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    // stop processing if received empty content\n    if (response.byteLength === 0) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Empty HLS segment content at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    segment.stats = getRequestStats(request);\n\n    if (segment.key) {\n      segment.encryptedBytes = new Uint8Array(request.response);\n    } else {\n      segment.bytes = new Uint8Array(request.response);\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\n/**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\nvar decryptSegment = function decryptSegment(decrypter, segment, doneFn) {\n  var decryptionHandler = function decryptionHandler(event) {\n    if (event.data.source === segment.requestId) {\n      decrypter.removeEventListener('message', decryptionHandler);\n      var decrypted = event.data.decrypted;\n\n      segment.bytes = new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength);\n      return doneFn(null, segment);\n    }\n  };\n\n  decrypter.addEventListener('message', decryptionHandler);\n\n  // this is an encrypted segment\n  // incrementally decrypt the segment\n  decrypter.postMessage((0, _binUtils.createTransferableMessage)({\n    source: segment.requestId,\n    encrypted: segment.encryptedBytes,\n    key: segment.key.bytes,\n    iv: segment.key.iv\n  }), [segment.encryptedBytes.buffer, segment.key.bytes.buffer]);\n};\n\n/**\n * The purpose of this function is to get the most pertinent error from the\n * array of errors.\n * For instance if a timeout and two aborts occur, then the aborts were\n * likely triggered by the timeout so return that error object.\n */\nvar getMostImportantError = function getMostImportantError(errors) {\n  return errors.reduce(function (prev, err) {\n    return err.code > prev.code ? err : prev;\n  });\n};\n\n/**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decrypter - a WebWorker interface to AES-128 decryption routines\n * @param {Function} doneFn - a callback that is executed after all resources have been\n *                            downloaded and any decryption completed\n */\nvar waitForCompletion = function waitForCompletion(activeXhrs, decrypter, doneFn) {\n  var errors = [];\n  var count = 0;\n\n  return function (error, segment) {\n    if (error) {\n      // If there are errors, we have to abort any outstanding requests\n      abortAll(activeXhrs);\n      errors.push(error);\n    }\n    count += 1;\n\n    if (count === activeXhrs.length) {\n      // Keep track of when *all* of the requests have completed\n      segment.endOfAllRequests = Date.now();\n\n      if (errors.length > 0) {\n        var worstError = getMostImportantError(errors);\n\n        return doneFn(worstError, segment);\n      }\n      if (segment.encryptedBytes) {\n        return decryptSegment(decrypter, segment, doneFn);\n      }\n      // Otherwise, everything is ready just continue\n      return doneFn(null, segment);\n    }\n  };\n};\n\n/**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n *                                is received\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\nvar handleProgress = function handleProgress(segment, progressFn) {\n  return function (event) {\n    segment.stats = _videoJs2['default'].mergeOptions(segment.stats, getProgressStats(event));\n\n    // record the time that we receive the first byte of data\n    if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n      segment.stats.firstBytesReceivedAt = Date.now();\n    }\n\n    return progressFn(event, segment);\n  };\n};\n\n/**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n *   decrypts the media-segment if it has a key uri and an iv\n *   aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n *   resolvedUri: String,\n *   [byterange]: {\n *     offset: Number,\n *     length: Number\n *   },\n *   [key]: {\n *     resolvedUri: String\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     iv: {\n *       bytes: Uint32Array\n *     }\n *   },\n *   [map]: {\n *     resolvedUri: String,\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     [bytes]: Uint8Array\n *   }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n *                                       decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that receives progress events from the main\n *                                segment's xhr request\n * @param {Function} doneFn - a callback that is executed only once all requests have\n *                            succeeded or failed\n * @returns {Function} a function that, when invoked, immediately aborts all\n *                     outstanding requests\n */\nvar mediaSegmentRequest = function mediaSegmentRequest(xhr, xhrOptions, decryptionWorker, segment, progressFn, doneFn) {\n  var activeXhrs = [];\n  var finishProcessingFn = waitForCompletion(activeXhrs, decryptionWorker, doneFn);\n\n  // optionally, request the decryption key\n  if (segment.key) {\n    var keyRequestOptions = _videoJs2['default'].mergeOptions(xhrOptions, {\n      uri: segment.key.resolvedUri,\n      responseType: 'arraybuffer'\n    });\n    var keyRequestCallback = handleKeyResponse(segment, finishProcessingFn);\n    var keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n\n    activeXhrs.push(keyXhr);\n  }\n\n  // optionally, request the associated media init segment\n  if (segment.map && !segment.map.bytes) {\n    var initSegmentOptions = _videoJs2['default'].mergeOptions(xhrOptions, {\n      uri: segment.map.resolvedUri,\n      responseType: 'arraybuffer',\n      headers: segmentXhrHeaders(segment.map)\n    });\n    var initSegmentRequestCallback = handleInitSegmentResponse(segment, finishProcessingFn);\n    var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n\n    activeXhrs.push(initSegmentXhr);\n  }\n\n  var segmentRequestOptions = _videoJs2['default'].mergeOptions(xhrOptions, {\n    uri: segment.resolvedUri,\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(segment)\n  });\n  var segmentRequestCallback = handleSegmentResponse(segment, finishProcessingFn);\n  var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n\n  segmentXhr.addEventListener('progress', handleProgress(segment, progressFn));\n  activeXhrs.push(segmentXhr);\n\n  return function () {\n    return abortAll(activeXhrs);\n  };\n};\nexports.mediaSegmentRequest = mediaSegmentRequest;",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * Electronic Codebook block mode.\n\t */\n\tCryptoJS.mode.ECB = (function () {\n\t    var ECB = CryptoJS.lib.BlockCipherMode.extend();\n\n\t    ECB.Encryptor = ECB.extend({\n\t        processBlock: function (words, offset) {\n\t            this._cipher.encryptBlock(words, offset);\n\t        }\n\t    });\n\n\t    ECB.Decryptor = ECB.extend({\n\t        processBlock: function (words, offset) {\n\t            this._cipher.decryptBlock(words, offset);\n\t        }\n\t    });\n\n\t    return ECB;\n\t}());\n\n\n\treturn CryptoJS.mode.ECB;\n\n}));","var getUint64 = require('../utils/numbers.js').getUint64;\n\nvar parseSidx = function(data) {\n  var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n      result = {\n        version: data[0],\n        flags: new Uint8Array(data.subarray(1, 4)),\n        references: [],\n        referenceId: view.getUint32(4),\n        timescale: view.getUint32(8)\n      },\n    i = 12;\n\n  if (result.version === 0) {\n    result.earliestPresentationTime = view.getUint32(i);\n    result.firstOffset = view.getUint32(i + 4);\n    i += 8;\n  } else {\n    // read 64 bits\n    result.earliestPresentationTime = getUint64(data.subarray(i));\n    result.firstOffset = getUint64(data.subarray(i + 8));\n    i += 16;\n  }\n\n  i += 2; // reserved\n\n  var referenceCount = view.getUint16(i);\n\n  i += 2; // start of references\n\n  for (; referenceCount > 0; i += 12, referenceCount--) {\n    result.references.push({\n      referenceType: (data[i] & 0x80) >>> 7,\n      referencedSize: view.getUint32(i) & 0x7FFFFFFF,\n      subsegmentDuration: view.getUint32(i + 4),\n      startsWithSap: !!(data[i + 8] & 0x80),\n      sapType: (data[i + 8] & 0x70) >>> 4,\n      sapDeltaTime: view.getUint32(i + 8) & 0x0FFFFFFF\n    });\n  }\n\n  return result;\n};\n\n\nmodule.exports = parseSidx;\n","'use strict';\nvar toObject = require('../internals/to-object');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\n\n// `Array.prototype.fill` method implementation\n// https://tc39.es/ecma262/#sec-array.prototype.fill\nmodule.exports = function fill(value /* , start = 0, end = @length */) {\n  var O = toObject(this);\n  var length = toLength(O.length);\n  var argumentsLength = arguments.length;\n  var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);\n  var end = argumentsLength > 2 ? arguments[2] : undefined;\n  var endPos = end === undefined ? length : toAbsoluteIndex(end, length);\n  while (endPos > index) O[index++] = value;\n  return O;\n};\n","var isObject = require('../internals/is-object');\n\nmodule.exports = function (it) {\n  if (!isObject(it)) {\n    throw TypeError(String(it) + ' is not an object');\n  } return it;\n};\n","var aes = require('./aes')\nvar Buffer = require('safe-buffer').Buffer\nvar Transform = require('cipher-base')\nvar inherits = require('inherits')\nvar GHASH = require('./ghash')\nvar xor = require('buffer-xor')\nvar incr32 = require('./incr32')\n\nfunction xorTest (a, b) {\n  var out = 0\n  if (a.length !== b.length) out++\n\n  var len = Math.min(a.length, b.length)\n  for (var i = 0; i < len; ++i) {\n    out += (a[i] ^ b[i])\n  }\n\n  return out\n}\n\nfunction calcIv (self, iv, ck) {\n  if (iv.length === 12) {\n    self._finID = Buffer.concat([iv, Buffer.from([0, 0, 0, 1])])\n    return Buffer.concat([iv, Buffer.from([0, 0, 0, 2])])\n  }\n  var ghash = new GHASH(ck)\n  var len = iv.length\n  var toPad = len % 16\n  ghash.update(iv)\n  if (toPad) {\n    toPad = 16 - toPad\n    ghash.update(Buffer.alloc(toPad, 0))\n  }\n  ghash.update(Buffer.alloc(8, 0))\n  var ivBits = len * 8\n  var tail = Buffer.alloc(8)\n  tail.writeUIntBE(ivBits, 0, 8)\n  ghash.update(tail)\n  self._finID = ghash.state\n  var out = Buffer.from(self._finID)\n  incr32(out)\n  return out\n}\nfunction StreamCipher (mode, key, iv, decrypt) {\n  Transform.call(this)\n\n  var h = Buffer.alloc(4, 0)\n\n  this._cipher = new aes.AES(key)\n  var ck = this._cipher.encryptBlock(h)\n  this._ghash = new GHASH(ck)\n  iv = calcIv(this, iv, ck)\n\n  this._prev = Buffer.from(iv)\n  this._cache = Buffer.allocUnsafe(0)\n  this._secCache = Buffer.allocUnsafe(0)\n  this._decrypt = decrypt\n  this._alen = 0\n  this._len = 0\n  this._mode = mode\n\n  this._authTag = null\n  this._called = false\n}\n\ninherits(StreamCipher, Transform)\n\nStreamCipher.prototype._update = function (chunk) {\n  if (!this._called && this._alen) {\n    var rump = 16 - (this._alen % 16)\n    if (rump < 16) {\n      rump = Buffer.alloc(rump, 0)\n      this._ghash.update(rump)\n    }\n  }\n\n  this._called = true\n  var out = this._mode.encrypt(this, chunk)\n  if (this._decrypt) {\n    this._ghash.update(chunk)\n  } else {\n    this._ghash.update(out)\n  }\n  this._len += chunk.length\n  return out\n}\n\nStreamCipher.prototype._final = function () {\n  if (this._decrypt && !this._authTag) throw new Error('Unsupported state or unable to authenticate data')\n\n  var tag = xor(this._ghash.final(this._alen * 8, this._len * 8), this._cipher.encryptBlock(this._finID))\n  if (this._decrypt && xorTest(tag, this._authTag)) throw new Error('Unsupported state or unable to authenticate data')\n\n  this._authTag = tag\n  this._cipher.scrub()\n}\n\nStreamCipher.prototype.getAuthTag = function getAuthTag () {\n  if (this._decrypt || !Buffer.isBuffer(this._authTag)) throw new Error('Attempting to get auth tag in unsupported state')\n\n  return this._authTag\n}\n\nStreamCipher.prototype.setAuthTag = function setAuthTag (tag) {\n  if (!this._decrypt) throw new Error('Attempting to set auth tag in unsupported state')\n\n  this._authTag = tag\n}\n\nStreamCipher.prototype.setAAD = function setAAD (buf) {\n  if (this._called) throw new Error('Attempting to set AAD in unsupported state')\n\n  this._ghash.update(buf)\n  this._alen += buf.length\n}\n\nmodule.exports = StreamCipher\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// Default exports for Node. Export the extended versions of VTTCue and\n// VTTRegion in Node since we likely want the capability to convert back and\n// forth between JSON. If we don't then it's not that big of a deal since we're\n// off browser.\n\nvar window = require('global/window');\n\nvar vttjs = module.exports = {\n  WebVTT: require(\"./vtt.js\"),\n  VTTCue: require(\"./vttcue.js\"),\n  VTTRegion: require(\"./vttregion.js\")\n};\n\nwindow.vttjs = vttjs;\nwindow.WebVTT = vttjs.WebVTT;\n\nvar cueShim = vttjs.VTTCue;\nvar regionShim = vttjs.VTTRegion;\nvar nativeVTTCue = window.VTTCue;\nvar nativeVTTRegion = window.VTTRegion;\n\nvttjs.shim = function() {\n  window.VTTCue = cueShim;\n  window.VTTRegion = regionShim;\n};\n\nvttjs.restore = function() {\n  window.VTTCue = nativeVTTCue;\n  window.VTTRegion = nativeVTTRegion;\n};\n\nif (!window.VTTCue) {\n  vttjs.shim();\n}\n","'use strict';\n\nconst Reporter = require('../base/reporter').Reporter;\nconst EncoderBuffer = require('../base/buffer').EncoderBuffer;\nconst DecoderBuffer = require('../base/buffer').DecoderBuffer;\nconst assert = require('minimalistic-assert');\n\n// Supported tags\nconst tags = [\n  'seq', 'seqof', 'set', 'setof', 'objid', 'bool',\n  'gentime', 'utctime', 'null_', 'enum', 'int', 'objDesc',\n  'bitstr', 'bmpstr', 'charstr', 'genstr', 'graphstr', 'ia5str', 'iso646str',\n  'numstr', 'octstr', 'printstr', 't61str', 'unistr', 'utf8str', 'videostr'\n];\n\n// Public methods list\nconst methods = [\n  'key', 'obj', 'use', 'optional', 'explicit', 'implicit', 'def', 'choice',\n  'any', 'contains'\n].concat(tags);\n\n// Overrided methods list\nconst overrided = [\n  '_peekTag', '_decodeTag', '_use',\n  '_decodeStr', '_decodeObjid', '_decodeTime',\n  '_decodeNull', '_decodeInt', '_decodeBool', '_decodeList',\n\n  '_encodeComposite', '_encodeStr', '_encodeObjid', '_encodeTime',\n  '_encodeNull', '_encodeInt', '_encodeBool'\n];\n\nfunction Node(enc, parent, name) {\n  const state = {};\n  this._baseState = state;\n\n  state.name = name;\n  state.enc = enc;\n\n  state.parent = parent || null;\n  state.children = null;\n\n  // State\n  state.tag = null;\n  state.args = null;\n  state.reverseArgs = null;\n  state.choice = null;\n  state.optional = false;\n  state.any = false;\n  state.obj = false;\n  state.use = null;\n  state.useDecoder = null;\n  state.key = null;\n  state['default'] = null;\n  state.explicit = null;\n  state.implicit = null;\n  state.contains = null;\n\n  // Should create new instance on each method\n  if (!state.parent) {\n    state.children = [];\n    this._wrap();\n  }\n}\nmodule.exports = Node;\n\nconst stateProps = [\n  'enc', 'parent', 'children', 'tag', 'args', 'reverseArgs', 'choice',\n  'optional', 'any', 'obj', 'use', 'alteredUse', 'key', 'default', 'explicit',\n  'implicit', 'contains'\n];\n\nNode.prototype.clone = function clone() {\n  const state = this._baseState;\n  const cstate = {};\n  stateProps.forEach(function(prop) {\n    cstate[prop] = state[prop];\n  });\n  const res = new this.constructor(cstate.parent);\n  res._baseState = cstate;\n  return res;\n};\n\nNode.prototype._wrap = function wrap() {\n  const state = this._baseState;\n  methods.forEach(function(method) {\n    this[method] = function _wrappedMethod() {\n      const clone = new this.constructor(this);\n      state.children.push(clone);\n      return clone[method].apply(clone, arguments);\n    };\n  }, this);\n};\n\nNode.prototype._init = function init(body) {\n  const state = this._baseState;\n\n  assert(state.parent === null);\n  body.call(this);\n\n  // Filter children\n  state.children = state.children.filter(function(child) {\n    return child._baseState.parent === this;\n  }, this);\n  assert.equal(state.children.length, 1, 'Root node can have only one child');\n};\n\nNode.prototype._useArgs = function useArgs(args) {\n  const state = this._baseState;\n\n  // Filter children and args\n  const children = args.filter(function(arg) {\n    return arg instanceof this.constructor;\n  }, this);\n  args = args.filter(function(arg) {\n    return !(arg instanceof this.constructor);\n  }, this);\n\n  if (children.length !== 0) {\n    assert(state.children === null);\n    state.children = children;\n\n    // Replace parent to maintain backward link\n    children.forEach(function(child) {\n      child._baseState.parent = this;\n    }, this);\n  }\n  if (args.length !== 0) {\n    assert(state.args === null);\n    state.args = args;\n    state.reverseArgs = args.map(function(arg) {\n      if (typeof arg !== 'object' || arg.constructor !== Object)\n        return arg;\n\n      const res = {};\n      Object.keys(arg).forEach(function(key) {\n        if (key == (key | 0))\n          key |= 0;\n        const value = arg[key];\n        res[value] = key;\n      });\n      return res;\n    });\n  }\n};\n\n//\n// Overrided methods\n//\n\noverrided.forEach(function(method) {\n  Node.prototype[method] = function _overrided() {\n    const state = this._baseState;\n    throw new Error(method + ' not implemented for encoding: ' + state.enc);\n  };\n});\n\n//\n// Public methods\n//\n\ntags.forEach(function(tag) {\n  Node.prototype[tag] = function _tagMethod() {\n    const state = this._baseState;\n    const args = Array.prototype.slice.call(arguments);\n\n    assert(state.tag === null);\n    state.tag = tag;\n\n    this._useArgs(args);\n\n    return this;\n  };\n});\n\nNode.prototype.use = function use(item) {\n  assert(item);\n  const state = this._baseState;\n\n  assert(state.use === null);\n  state.use = item;\n\n  return this;\n};\n\nNode.prototype.optional = function optional() {\n  const state = this._baseState;\n\n  state.optional = true;\n\n  return this;\n};\n\nNode.prototype.def = function def(val) {\n  const state = this._baseState;\n\n  assert(state['default'] === null);\n  state['default'] = val;\n  state.optional = true;\n\n  return this;\n};\n\nNode.prototype.explicit = function explicit(num) {\n  const state = this._baseState;\n\n  assert(state.explicit === null && state.implicit === null);\n  state.explicit = num;\n\n  return this;\n};\n\nNode.prototype.implicit = function implicit(num) {\n  const state = this._baseState;\n\n  assert(state.explicit === null && state.implicit === null);\n  state.implicit = num;\n\n  return this;\n};\n\nNode.prototype.obj = function obj() {\n  const state = this._baseState;\n  const args = Array.prototype.slice.call(arguments);\n\n  state.obj = true;\n\n  if (args.length !== 0)\n    this._useArgs(args);\n\n  return this;\n};\n\nNode.prototype.key = function key(newKey) {\n  const state = this._baseState;\n\n  assert(state.key === null);\n  state.key = newKey;\n\n  return this;\n};\n\nNode.prototype.any = function any() {\n  const state = this._baseState;\n\n  state.any = true;\n\n  return this;\n};\n\nNode.prototype.choice = function choice(obj) {\n  const state = this._baseState;\n\n  assert(state.choice === null);\n  state.choice = obj;\n  this._useArgs(Object.keys(obj).map(function(key) {\n    return obj[key];\n  }));\n\n  return this;\n};\n\nNode.prototype.contains = function contains(item) {\n  const state = this._baseState;\n\n  assert(state.use === null);\n  state.contains = item;\n\n  return this;\n};\n\n//\n// Decoding\n//\n\nNode.prototype._decode = function decode(input, options) {\n  const state = this._baseState;\n\n  // Decode root node\n  if (state.parent === null)\n    return input.wrapResult(state.children[0]._decode(input, options));\n\n  let result = state['default'];\n  let present = true;\n\n  let prevKey = null;\n  if (state.key !== null)\n    prevKey = input.enterKey(state.key);\n\n  // Check if tag is there\n  if (state.optional) {\n    let tag = null;\n    if (state.explicit !== null)\n      tag = state.explicit;\n    else if (state.implicit !== null)\n      tag = state.implicit;\n    else if (state.tag !== null)\n      tag = state.tag;\n\n    if (tag === null && !state.any) {\n      // Trial and Error\n      const save = input.save();\n      try {\n        if (state.choice === null)\n          this._decodeGeneric(state.tag, input, options);\n        else\n          this._decodeChoice(input, options);\n        present = true;\n      } catch (e) {\n        present = false;\n      }\n      input.restore(save);\n    } else {\n      present = this._peekTag(input, tag, state.any);\n\n      if (input.isError(present))\n        return present;\n    }\n  }\n\n  // Push object on stack\n  let prevObj;\n  if (state.obj && present)\n    prevObj = input.enterObject();\n\n  if (present) {\n    // Unwrap explicit values\n    if (state.explicit !== null) {\n      const explicit = this._decodeTag(input, state.explicit);\n      if (input.isError(explicit))\n        return explicit;\n      input = explicit;\n    }\n\n    const start = input.offset;\n\n    // Unwrap implicit and normal values\n    if (state.use === null && state.choice === null) {\n      let save;\n      if (state.any)\n        save = input.save();\n      const body = this._decodeTag(\n        input,\n        state.implicit !== null ? state.implicit : state.tag,\n        state.any\n      );\n      if (input.isError(body))\n        return body;\n\n      if (state.any)\n        result = input.raw(save);\n      else\n        input = body;\n    }\n\n    if (options && options.track && state.tag !== null)\n      options.track(input.path(), start, input.length, 'tagged');\n\n    if (options && options.track && state.tag !== null)\n      options.track(input.path(), input.offset, input.length, 'content');\n\n    // Select proper method for tag\n    if (state.any) {\n      // no-op\n    } else if (state.choice === null) {\n      result = this._decodeGeneric(state.tag, input, options);\n    } else {\n      result = this._decodeChoice(input, options);\n    }\n\n    if (input.isError(result))\n      return result;\n\n    // Decode children\n    if (!state.any && state.choice === null && state.children !== null) {\n      state.children.forEach(function decodeChildren(child) {\n        // NOTE: We are ignoring errors here, to let parser continue with other\n        // parts of encoded data\n        child._decode(input, options);\n      });\n    }\n\n    // Decode contained/encoded by schema, only in bit or octet strings\n    if (state.contains && (state.tag === 'octstr' || state.tag === 'bitstr')) {\n      const data = new DecoderBuffer(result);\n      result = this._getUse(state.contains, input._reporterState.obj)\n        ._decode(data, options);\n    }\n  }\n\n  // Pop object\n  if (state.obj && present)\n    result = input.leaveObject(prevObj);\n\n  // Set key\n  if (state.key !== null && (result !== null || present === true))\n    input.leaveKey(prevKey, state.key, result);\n  else if (prevKey !== null)\n    input.exitKey(prevKey);\n\n  return result;\n};\n\nNode.prototype._decodeGeneric = function decodeGeneric(tag, input, options) {\n  const state = this._baseState;\n\n  if (tag === 'seq' || tag === 'set')\n    return null;\n  if (tag === 'seqof' || tag === 'setof')\n    return this._decodeList(input, tag, state.args[0], options);\n  else if (/str$/.test(tag))\n    return this._decodeStr(input, tag, options);\n  else if (tag === 'objid' && state.args)\n    return this._decodeObjid(input, state.args[0], state.args[1], options);\n  else if (tag === 'objid')\n    return this._decodeObjid(input, null, null, options);\n  else if (tag === 'gentime' || tag === 'utctime')\n    return this._decodeTime(input, tag, options);\n  else if (tag === 'null_')\n    return this._decodeNull(input, options);\n  else if (tag === 'bool')\n    return this._decodeBool(input, options);\n  else if (tag === 'objDesc')\n    return this._decodeStr(input, tag, options);\n  else if (tag === 'int' || tag === 'enum')\n    return this._decodeInt(input, state.args && state.args[0], options);\n\n  if (state.use !== null) {\n    return this._getUse(state.use, input._reporterState.obj)\n      ._decode(input, options);\n  } else {\n    return input.error('unknown tag: ' + tag);\n  }\n};\n\nNode.prototype._getUse = function _getUse(entity, obj) {\n\n  const state = this._baseState;\n  // Create altered use decoder if implicit is set\n  state.useDecoder = this._use(entity, obj);\n  assert(state.useDecoder._baseState.parent === null);\n  state.useDecoder = state.useDecoder._baseState.children[0];\n  if (state.implicit !== state.useDecoder._baseState.implicit) {\n    state.useDecoder = state.useDecoder.clone();\n    state.useDecoder._baseState.implicit = state.implicit;\n  }\n  return state.useDecoder;\n};\n\nNode.prototype._decodeChoice = function decodeChoice(input, options) {\n  const state = this._baseState;\n  let result = null;\n  let match = false;\n\n  Object.keys(state.choice).some(function(key) {\n    const save = input.save();\n    const node = state.choice[key];\n    try {\n      const value = node._decode(input, options);\n      if (input.isError(value))\n        return false;\n\n      result = { type: key, value: value };\n      match = true;\n    } catch (e) {\n      input.restore(save);\n      return false;\n    }\n    return true;\n  }, this);\n\n  if (!match)\n    return input.error('Choice not matched');\n\n  return result;\n};\n\n//\n// Encoding\n//\n\nNode.prototype._createEncoderBuffer = function createEncoderBuffer(data) {\n  return new EncoderBuffer(data, this.reporter);\n};\n\nNode.prototype._encode = function encode(data, reporter, parent) {\n  const state = this._baseState;\n  if (state['default'] !== null && state['default'] === data)\n    return;\n\n  const result = this._encodeValue(data, reporter, parent);\n  if (result === undefined)\n    return;\n\n  if (this._skipDefault(result, reporter, parent))\n    return;\n\n  return result;\n};\n\nNode.prototype._encodeValue = function encode(data, reporter, parent) {\n  const state = this._baseState;\n\n  // Decode root node\n  if (state.parent === null)\n    return state.children[0]._encode(data, reporter || new Reporter());\n\n  let result = null;\n\n  // Set reporter to share it with a child class\n  this.reporter = reporter;\n\n  // Check if data is there\n  if (state.optional && data === undefined) {\n    if (state['default'] !== null)\n      data = state['default'];\n    else\n      return;\n  }\n\n  // Encode children first\n  let content = null;\n  let primitive = false;\n  if (state.any) {\n    // Anything that was given is translated to buffer\n    result = this._createEncoderBuffer(data);\n  } else if (state.choice) {\n    result = this._encodeChoice(data, reporter);\n  } else if (state.contains) {\n    content = this._getUse(state.contains, parent)._encode(data, reporter);\n    primitive = true;\n  } else if (state.children) {\n    content = state.children.map(function(child) {\n      if (child._baseState.tag === 'null_')\n        return child._encode(null, reporter, data);\n\n      if (child._baseState.key === null)\n        return reporter.error('Child should have a key');\n      const prevKey = reporter.enterKey(child._baseState.key);\n\n      if (typeof data !== 'object')\n        return reporter.error('Child expected, but input is not object');\n\n      const res = child._encode(data[child._baseState.key], reporter, data);\n      reporter.leaveKey(prevKey);\n\n      return res;\n    }, this).filter(function(child) {\n      return child;\n    });\n    content = this._createEncoderBuffer(content);\n  } else {\n    if (state.tag === 'seqof' || state.tag === 'setof') {\n      // TODO(indutny): this should be thrown on DSL level\n      if (!(state.args && state.args.length === 1))\n        return reporter.error('Too many args for : ' + state.tag);\n\n      if (!Array.isArray(data))\n        return reporter.error('seqof/setof, but data is not Array');\n\n      const child = this.clone();\n      child._baseState.implicit = null;\n      content = this._createEncoderBuffer(data.map(function(item) {\n        const state = this._baseState;\n\n        return this._getUse(state.args[0], data)._encode(item, reporter);\n      }, child));\n    } else if (state.use !== null) {\n      result = this._getUse(state.use, parent)._encode(data, reporter);\n    } else {\n      content = this._encodePrimitive(state.tag, data);\n      primitive = true;\n    }\n  }\n\n  // Encode data itself\n  if (!state.any && state.choice === null) {\n    const tag = state.implicit !== null ? state.implicit : state.tag;\n    const cls = state.implicit === null ? 'universal' : 'context';\n\n    if (tag === null) {\n      if (state.use === null)\n        reporter.error('Tag could be omitted only for .use()');\n    } else {\n      if (state.use === null)\n        result = this._encodeComposite(tag, primitive, cls, content);\n    }\n  }\n\n  // Wrap in explicit\n  if (state.explicit !== null)\n    result = this._encodeComposite(state.explicit, false, 'context', result);\n\n  return result;\n};\n\nNode.prototype._encodeChoice = function encodeChoice(data, reporter) {\n  const state = this._baseState;\n\n  const node = state.choice[data.type];\n  if (!node) {\n    assert(\n      false,\n      data.type + ' not found in ' +\n            JSON.stringify(Object.keys(state.choice)));\n  }\n  return node._encode(data.value, reporter);\n};\n\nNode.prototype._encodePrimitive = function encodePrimitive(tag, data) {\n  const state = this._baseState;\n\n  if (/str$/.test(tag))\n    return this._encodeStr(data, tag);\n  else if (tag === 'objid' && state.args)\n    return this._encodeObjid(data, state.reverseArgs[0], state.args[1]);\n  else if (tag === 'objid')\n    return this._encodeObjid(data, null, null);\n  else if (tag === 'gentime' || tag === 'utctime')\n    return this._encodeTime(data, tag);\n  else if (tag === 'null_')\n    return this._encodeNull();\n  else if (tag === 'int' || tag === 'enum')\n    return this._encodeInt(data, state.args && state.reverseArgs[0]);\n  else if (tag === 'bool')\n    return this._encodeBool(data);\n  else if (tag === 'objDesc')\n    return this._encodeStr(data, tag);\n  else\n    throw new Error('Unsupported tag: ' + tag);\n};\n\nNode.prototype._isNumstr = function isNumstr(str) {\n  return /^[0-9 ]*$/.test(str);\n};\n\nNode.prototype._isPrintstr = function isPrintstr(str) {\n  return /^[A-Za-z0-9 '()+,-./:=?]*$/.test(str);\n};\n","module.exports = isFunction\n\nvar toString = Object.prototype.toString\n\nfunction isFunction (fn) {\n  if (!fn) {\n    return false\n  }\n  var string = toString.call(fn)\n  return string === '[object Function]' ||\n    (typeof fn === 'function' && string !== '[object RegExp]') ||\n    (typeof window !== 'undefined' &&\n     // IE8 and below\n     (fn === window.setTimeout ||\n      fn === window.alert ||\n      fn === window.confirm ||\n      fn === window.prompt))\n};\n","var fails = require('../internals/fails');\n\n// Detect IE8's incomplete defineProperty implementation\nmodule.exports = !fails(function () {\n  // eslint-disable-next-line es/no-object-defineproperty -- required for testing\n  return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;\n});\n","module.exports = function xor (a, b) {\n  var len = a.length\n  var i = -1\n  while (++i < len) {\n    a[i] ^= b[i]\n  }\n  return a\n}\n","'use strict';\nvar toPrimitive = require('../internals/to-primitive');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = function (object, key, value) {\n  var propertyKey = toPrimitive(key);\n  if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor(0, value));\n  else object[propertyKey] = value;\n};\n","'use strict';\nvar fixRegExpWellKnownSymbolLogic = require('../internals/fix-regexp-well-known-symbol-logic');\nvar anObject = require('../internals/an-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\nvar sameValue = require('../internals/same-value');\nvar regExpExec = require('../internals/regexp-exec-abstract');\n\n// @@search logic\nfixRegExpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {\n  return [\n    // `String.prototype.search` method\n    // https://tc39.es/ecma262/#sec-string.prototype.search\n    function search(regexp) {\n      var O = requireObjectCoercible(this);\n      var searcher = regexp == undefined ? undefined : regexp[SEARCH];\n      return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));\n    },\n    // `RegExp.prototype[@@search]` method\n    // https://tc39.es/ecma262/#sec-regexp.prototype-@@search\n    function (regexp) {\n      var res = maybeCallNative(nativeSearch, regexp, this);\n      if (res.done) return res.value;\n\n      var rx = anObject(regexp);\n      var S = String(this);\n\n      var previousLastIndex = rx.lastIndex;\n      if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;\n      var result = regExpExec(rx, S);\n      if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;\n      return result === null ? -1 : result.index;\n    }\n  ];\n});\n","/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {string[]} groups\n *        The media groups to call the callback for\n * @param {Function} callback\n *        Callback to call for each media group\n */\nexport var forEachMediaGroup = function forEachMediaGroup(master, groups, callback) {\n  groups.forEach(function (mediaType) {\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};","/*! @name mpd-parser @version 0.22.1 @license Apache-2.0 */\nimport resolveUrl from '@videojs/vhs-utils/es/resolve-url';\nimport window from 'global/window';\nimport { forEachMediaGroup } from '@videojs/vhs-utils/es/media-groups';\nimport decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array';\nimport { DOMParser } from '@xmldom/xmldom';\n\nvar version = \"0.22.1\";\n\nvar isObject = function isObject(obj) {\n  return !!obj && typeof obj === 'object';\n};\n\nvar merge = function merge() {\n  for (var _len = arguments.length, objects = new Array(_len), _key = 0; _key < _len; _key++) {\n    objects[_key] = arguments[_key];\n  }\n\n  return objects.reduce(function (result, source) {\n    if (typeof source !== 'object') {\n      return result;\n    }\n\n    Object.keys(source).forEach(function (key) {\n      if (Array.isArray(result[key]) && Array.isArray(source[key])) {\n        result[key] = result[key].concat(source[key]);\n      } else if (isObject(result[key]) && isObject(source[key])) {\n        result[key] = merge(result[key], source[key]);\n      } else {\n        result[key] = source[key];\n      }\n    });\n    return result;\n  }, {});\n};\nvar values = function values(o) {\n  return Object.keys(o).map(function (k) {\n    return o[k];\n  });\n};\n\nvar range = function range(start, end) {\n  var result = [];\n\n  for (var i = start; i < end; i++) {\n    result.push(i);\n  }\n\n  return result;\n};\nvar flatten = function flatten(lists) {\n  return lists.reduce(function (x, y) {\n    return x.concat(y);\n  }, []);\n};\nvar from = function from(list) {\n  if (!list.length) {\n    return [];\n  }\n\n  var result = [];\n\n  for (var i = 0; i < list.length; i++) {\n    result.push(list[i]);\n  }\n\n  return result;\n};\nvar findIndexes = function findIndexes(l, key) {\n  return l.reduce(function (a, e, i) {\n    if (e[key]) {\n      a.push(i);\n    }\n\n    return a;\n  }, []);\n};\n/**\n * Returns the first index that satisfies the matching function, or -1 if not found.\n *\n * Only necessary because of IE11 support.\n *\n * @param {Array} list - the list to search through\n * @param {Function} matchingFunction - the matching function\n *\n * @return {number} the matching index or -1 if not found\n */\n\nvar findIndex = function findIndex(list, matchingFunction) {\n  for (var i = 0; i < list.length; i++) {\n    if (matchingFunction(list[i])) {\n      return i;\n    }\n  }\n\n  return -1;\n};\n/**\n * Returns a union of the included lists provided each element can be identified by a key.\n *\n * @param {Array} list - list of lists to get the union of\n * @param {Function} keyFunction - the function to use as a key for each element\n *\n * @return {Array} the union of the arrays\n */\n\nvar union = function union(lists, keyFunction) {\n  return values(lists.reduce(function (acc, list) {\n    list.forEach(function (el) {\n      acc[keyFunction(el)] = el;\n    });\n    return acc;\n  }, {}));\n};\n\nvar errors = {\n  INVALID_NUMBER_OF_PERIOD: 'INVALID_NUMBER_OF_PERIOD',\n  DASH_EMPTY_MANIFEST: 'DASH_EMPTY_MANIFEST',\n  DASH_INVALID_XML: 'DASH_INVALID_XML',\n  NO_BASE_URL: 'NO_BASE_URL',\n  MISSING_SEGMENT_INFORMATION: 'MISSING_SEGMENT_INFORMATION',\n  SEGMENT_TIME_UNSPECIFIED: 'SEGMENT_TIME_UNSPECIFIED',\n  UNSUPPORTED_UTC_TIMING_SCHEME: 'UNSUPPORTED_UTC_TIMING_SCHEME'\n};\n\n/**\n * @typedef {Object} SingleUri\n * @property {string} uri - relative location of segment\n * @property {string} resolvedUri - resolved location of segment\n * @property {Object} byterange - Object containing information on how to make byte range\n *   requests following byte-range-spec per RFC2616.\n * @property {String} byterange.length - length of range request\n * @property {String} byterange.offset - byte offset of range request\n *\n * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1\n */\n\n/**\n * Converts a URLType node (5.3.9.2.3 Table 13) to a segment object\n * that conforms to how m3u8-parser is structured\n *\n * @see https://github.com/videojs/m3u8-parser\n *\n * @param {string} baseUrl - baseUrl provided by <BaseUrl> nodes\n * @param {string} source - source url for segment\n * @param {string} range - optional range used for range calls,\n *   follows  RFC 2616, Clause 14.35.1\n * @return {SingleUri} full segment information transformed into a format similar\n *   to m3u8-parser\n */\n\nvar urlTypeToSegment = function urlTypeToSegment(_ref) {\n  var _ref$baseUrl = _ref.baseUrl,\n      baseUrl = _ref$baseUrl === void 0 ? '' : _ref$baseUrl,\n      _ref$source = _ref.source,\n      source = _ref$source === void 0 ? '' : _ref$source,\n      _ref$range = _ref.range,\n      range = _ref$range === void 0 ? '' : _ref$range,\n      _ref$indexRange = _ref.indexRange,\n      indexRange = _ref$indexRange === void 0 ? '' : _ref$indexRange;\n  var segment = {\n    uri: source,\n    resolvedUri: resolveUrl(baseUrl || '', source)\n  };\n\n  if (range || indexRange) {\n    var rangeStr = range ? range : indexRange;\n    var ranges = rangeStr.split('-'); // default to parsing this as a BigInt if possible\n\n    var startRange = window.BigInt ? window.BigInt(ranges[0]) : parseInt(ranges[0], 10);\n    var endRange = window.BigInt ? window.BigInt(ranges[1]) : parseInt(ranges[1], 10); // convert back to a number if less than MAX_SAFE_INTEGER\n\n    if (startRange < Number.MAX_SAFE_INTEGER && typeof startRange === 'bigint') {\n      startRange = Number(startRange);\n    }\n\n    if (endRange < Number.MAX_SAFE_INTEGER && typeof endRange === 'bigint') {\n      endRange = Number(endRange);\n    }\n\n    var length;\n\n    if (typeof endRange === 'bigint' || typeof startRange === 'bigint') {\n      length = window.BigInt(endRange) - window.BigInt(startRange) + window.BigInt(1);\n    } else {\n      length = endRange - startRange + 1;\n    }\n\n    if (typeof length === 'bigint' && length < Number.MAX_SAFE_INTEGER) {\n      length = Number(length);\n    } // byterange should be inclusive according to\n    // RFC 2616, Clause 14.35.1\n\n\n    segment.byterange = {\n      length: length,\n      offset: startRange\n    };\n  }\n\n  return segment;\n};\nvar byteRangeToString = function byteRangeToString(byterange) {\n  // `endRange` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var endRange;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    endRange = window.BigInt(byterange.offset) + window.BigInt(byterange.length) - window.BigInt(1);\n  } else {\n    endRange = byterange.offset + byterange.length - 1;\n  }\n\n  return byterange.offset + \"-\" + endRange;\n};\n\n/**\n * parse the end number attribue that can be a string\n * number, or undefined.\n *\n * @param {string|number|undefined} endNumber\n *        The end number attribute.\n *\n * @return {number|null}\n *          The result of parsing the end number.\n */\n\nvar parseEndNumber = function parseEndNumber(endNumber) {\n  if (endNumber && typeof endNumber !== 'number') {\n    endNumber = parseInt(endNumber, 10);\n  }\n\n  if (isNaN(endNumber)) {\n    return null;\n  }\n\n  return endNumber;\n};\n/**\n * Functions for calculating the range of available segments in static and dynamic\n * manifests.\n */\n\n\nvar segmentRange = {\n  /**\n   * Returns the entire range of available segments for a static MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  static: function _static(attributes) {\n    var duration = attributes.duration,\n        _attributes$timescale = attributes.timescale,\n        timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n        sourceDuration = attributes.sourceDuration,\n        periodDuration = attributes.periodDuration;\n    var endNumber = parseEndNumber(attributes.endNumber);\n    var segmentDuration = duration / timescale;\n\n    if (typeof endNumber === 'number') {\n      return {\n        start: 0,\n        end: endNumber\n      };\n    }\n\n    if (typeof periodDuration === 'number') {\n      return {\n        start: 0,\n        end: periodDuration / segmentDuration\n      };\n    }\n\n    return {\n      start: 0,\n      end: sourceDuration / segmentDuration\n    };\n  },\n\n  /**\n   * Returns the current live window range of available segments for a dynamic MPD\n   *\n   * @param {Object} attributes\n   *        Inheritied MPD attributes\n   * @return {{ start: number, end: number }}\n   *         The start and end numbers for available segments\n   */\n  dynamic: function dynamic(attributes) {\n    var NOW = attributes.NOW,\n        clientOffset = attributes.clientOffset,\n        availabilityStartTime = attributes.availabilityStartTime,\n        _attributes$timescale2 = attributes.timescale,\n        timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n        duration = attributes.duration,\n        _attributes$periodSta = attributes.periodStart,\n        periodStart = _attributes$periodSta === void 0 ? 0 : _attributes$periodSta,\n        _attributes$minimumUp = attributes.minimumUpdatePeriod,\n        minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp,\n        _attributes$timeShift = attributes.timeShiftBufferDepth,\n        timeShiftBufferDepth = _attributes$timeShift === void 0 ? Infinity : _attributes$timeShift;\n    var endNumber = parseEndNumber(attributes.endNumber); // clientOffset is passed in at the top level of mpd-parser and is an offset calculated\n    // after retrieving UTC server time.\n\n    var now = (NOW + clientOffset) / 1000; // WC stands for Wall Clock.\n    // Convert the period start time to EPOCH.\n\n    var periodStartWC = availabilityStartTime + periodStart; // Period end in EPOCH is manifest's retrieval time + time until next update.\n\n    var periodEndWC = now + minimumUpdatePeriod;\n    var periodDuration = periodEndWC - periodStartWC;\n    var segmentCount = Math.ceil(periodDuration * timescale / duration);\n    var availableStart = Math.floor((now - periodStartWC - timeShiftBufferDepth) * timescale / duration);\n    var availableEnd = Math.floor((now - periodStartWC) * timescale / duration);\n    return {\n      start: Math.max(0, availableStart),\n      end: typeof endNumber === 'number' ? endNumber : Math.min(segmentCount, availableEnd)\n    };\n  }\n};\n/**\n * Maps a range of numbers to objects with information needed to build the corresponding\n * segment list\n *\n * @name toSegmentsCallback\n * @function\n * @param {number} number\n *        Number of the segment\n * @param {number} index\n *        Index of the number in the range list\n * @return {{ number: Number, duration: Number, timeline: Number, time: Number }}\n *         Object with segment timing and duration info\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping a range of numbers to\n * information needed to build the segment list.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {toSegmentsCallback}\n *         Callback map function\n */\n\nvar toSegments = function toSegments(attributes) {\n  return function (number) {\n    var duration = attributes.duration,\n        _attributes$timescale3 = attributes.timescale,\n        timescale = _attributes$timescale3 === void 0 ? 1 : _attributes$timescale3,\n        periodStart = attributes.periodStart,\n        _attributes$startNumb = attributes.startNumber,\n        startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb;\n    return {\n      number: startNumber + number,\n      duration: duration / timescale,\n      timeline: periodStart,\n      time: number * duration\n    };\n  };\n};\n/**\n * Returns a list of objects containing segment timing and duration info used for\n * building the list of segments. This uses the @duration attribute specified\n * in the MPD manifest to derive the range of segments.\n *\n * @param {Object} attributes\n *        Inherited MPD attributes\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\nvar parseByDuration = function parseByDuration(attributes) {\n  var type = attributes.type,\n      duration = attributes.duration,\n      _attributes$timescale4 = attributes.timescale,\n      timescale = _attributes$timescale4 === void 0 ? 1 : _attributes$timescale4,\n      periodDuration = attributes.periodDuration,\n      sourceDuration = attributes.sourceDuration;\n\n  var _segmentRange$type = segmentRange[type](attributes),\n      start = _segmentRange$type.start,\n      end = _segmentRange$type.end;\n\n  var segments = range(start, end).map(toSegments(attributes));\n\n  if (type === 'static') {\n    var index = segments.length - 1; // section is either a period or the full source\n\n    var sectionDuration = typeof periodDuration === 'number' ? periodDuration : sourceDuration; // final segment may be less than full segment duration\n\n    segments[index].duration = sectionDuration - duration / timescale * index;\n  }\n\n  return segments;\n};\n\n/**\n * Translates SegmentBase into a set of segments.\n * (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @return {Object.<Array>} list of segments\n */\n\nvar segmentsFromBase = function segmentsFromBase(attributes) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$indexRang = attributes.indexRange,\n      indexRange = _attributes$indexRang === void 0 ? '' : _attributes$indexRang,\n      periodStart = attributes.periodStart,\n      presentationTime = attributes.presentationTime,\n      _attributes$number = attributes.number,\n      number = _attributes$number === void 0 ? 0 : _attributes$number,\n      duration = attributes.duration; // base url is required for SegmentBase to work, per spec (Section 5.3.9.2.1)\n\n  if (!baseUrl) {\n    throw new Error(errors.NO_BASE_URL);\n  }\n\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: baseUrl,\n    indexRange: indexRange\n  });\n  segment.map = initSegment; // If there is a duration, use it, otherwise use the given duration of the source\n  // (since SegmentBase is only for one total segment)\n\n  if (duration) {\n    var segmentTimeInfo = parseByDuration(attributes);\n\n    if (segmentTimeInfo.length) {\n      segment.duration = segmentTimeInfo[0].duration;\n      segment.timeline = segmentTimeInfo[0].timeline;\n    }\n  } else if (sourceDuration) {\n    segment.duration = sourceDuration;\n    segment.timeline = periodStart;\n  } // If presentation time is provided, these segments are being generated by SIDX\n  // references, and should use the time provided. For the general case of SegmentBase,\n  // there should only be one segment in the period, so its presentation time is the same\n  // as its period start.\n\n\n  segment.presentationTime = presentationTime || periodStart;\n  segment.number = number;\n  return [segment];\n};\n/**\n * Given a playlist, a sidx box, and a baseUrl, update the segment list of the playlist\n * according to the sidx information given.\n *\n * playlist.sidx has metadadata about the sidx where-as the sidx param\n * is the parsed sidx box itself.\n *\n * @param {Object} playlist the playlist to update the sidx information for\n * @param {Object} sidx the parsed sidx box\n * @return {Object} the playlist object with the updated sidx information\n */\n\nvar addSidxSegmentsToPlaylist$1 = function addSidxSegmentsToPlaylist(playlist, sidx, baseUrl) {\n  // Retain init segment information\n  var initSegment = playlist.sidx.map ? playlist.sidx.map : null; // Retain source duration from initial main manifest parsing\n\n  var sourceDuration = playlist.sidx.duration; // Retain source timeline\n\n  var timeline = playlist.timeline || 0;\n  var sidxByteRange = playlist.sidx.byterange;\n  var sidxEnd = sidxByteRange.offset + sidxByteRange.length; // Retain timescale of the parsed sidx\n\n  var timescale = sidx.timescale; // referenceType 1 refers to other sidx boxes\n\n  var mediaReferences = sidx.references.filter(function (r) {\n    return r.referenceType !== 1;\n  });\n  var segments = [];\n  var type = playlist.endList ? 'static' : 'dynamic';\n  var periodStart = playlist.sidx.timeline;\n  var presentationTime = periodStart;\n  var number = playlist.mediaSequence || 0; // firstOffset is the offset from the end of the sidx box\n\n  var startIndex; // eslint-disable-next-line\n\n  if (typeof sidx.firstOffset === 'bigint') {\n    startIndex = window.BigInt(sidxEnd) + sidx.firstOffset;\n  } else {\n    startIndex = sidxEnd + sidx.firstOffset;\n  }\n\n  for (var i = 0; i < mediaReferences.length; i++) {\n    var reference = sidx.references[i]; // size of the referenced (sub)segment\n\n    var size = reference.referencedSize; // duration of the referenced (sub)segment, in  the  timescale\n    // this will be converted to seconds when generating segments\n\n    var duration = reference.subsegmentDuration; // should be an inclusive range\n\n    var endIndex = void 0; // eslint-disable-next-line\n\n    if (typeof startIndex === 'bigint') {\n      endIndex = startIndex + window.BigInt(size) - window.BigInt(1);\n    } else {\n      endIndex = startIndex + size - 1;\n    }\n\n    var indexRange = startIndex + \"-\" + endIndex;\n    var attributes = {\n      baseUrl: baseUrl,\n      timescale: timescale,\n      timeline: timeline,\n      periodStart: periodStart,\n      presentationTime: presentationTime,\n      number: number,\n      duration: duration,\n      sourceDuration: sourceDuration,\n      indexRange: indexRange,\n      type: type\n    };\n    var segment = segmentsFromBase(attributes)[0];\n\n    if (initSegment) {\n      segment.map = initSegment;\n    }\n\n    segments.push(segment);\n\n    if (typeof startIndex === 'bigint') {\n      startIndex += window.BigInt(size);\n    } else {\n      startIndex += size;\n    }\n\n    presentationTime += duration / timescale;\n    number++;\n  }\n\n  playlist.segments = segments;\n  return playlist;\n};\n\nvar SUPPORTED_MEDIA_TYPES = ['AUDIO', 'SUBTITLES']; // allow one 60fps frame as leniency (arbitrarily chosen)\n\nvar TIME_FUDGE = 1 / 60;\n/**\n * Given a list of timelineStarts, combines, dedupes, and sorts them.\n *\n * @param {TimelineStart[]} timelineStarts - list of timeline starts\n *\n * @return {TimelineStart[]} the combined and deduped timeline starts\n */\n\nvar getUniqueTimelineStarts = function getUniqueTimelineStarts(timelineStarts) {\n  return union(timelineStarts, function (_ref) {\n    var timeline = _ref.timeline;\n    return timeline;\n  }).sort(function (a, b) {\n    return a.timeline > b.timeline ? 1 : -1;\n  });\n};\n/**\n * Finds the playlist with the matching NAME attribute.\n *\n * @param {Array} playlists - playlists to search through\n * @param {string} name - the NAME attribute to search for\n *\n * @return {Object|null} the matching playlist object, or null\n */\n\nvar findPlaylistWithName = function findPlaylistWithName(playlists, name) {\n  for (var i = 0; i < playlists.length; i++) {\n    if (playlists[i].attributes.NAME === name) {\n      return playlists[i];\n    }\n  }\n\n  return null;\n};\n/**\n * Gets a flattened array of media group playlists.\n *\n * @param {Object} manifest - the main manifest object\n *\n * @return {Array} the media group playlists\n */\n\nvar getMediaGroupPlaylists = function getMediaGroupPlaylists(manifest) {\n  var mediaGroupPlaylists = [];\n  forEachMediaGroup(manifest, SUPPORTED_MEDIA_TYPES, function (properties, type, group, label) {\n    mediaGroupPlaylists = mediaGroupPlaylists.concat(properties.playlists || []);\n  });\n  return mediaGroupPlaylists;\n};\n/**\n * Updates the playlist's media sequence numbers.\n *\n * @param {Object} config - options object\n * @param {Object} config.playlist - the playlist to update\n * @param {number} config.mediaSequence - the mediaSequence number to start with\n */\n\nvar updateMediaSequenceForPlaylist = function updateMediaSequenceForPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      mediaSequence = _ref2.mediaSequence;\n  playlist.mediaSequence = mediaSequence;\n  playlist.segments.forEach(function (segment, index) {\n    segment.number = playlist.mediaSequence + index;\n  });\n};\n/**\n * Updates the media and discontinuity sequence numbers of newPlaylists given oldPlaylists\n * and a complete list of timeline starts.\n *\n * If no matching playlist is found, only the discontinuity sequence number of the playlist\n * will be updated.\n *\n * Since early available timelines are not supported, at least one segment must be present.\n *\n * @param {Object} config - options object\n * @param {Object[]} oldPlaylists - the old playlists to use as a reference\n * @param {Object[]} newPlaylists - the new playlists to update\n * @param {Object} timelineStarts - all timelineStarts seen in the stream to this point\n */\n\nvar updateSequenceNumbers = function updateSequenceNumbers(_ref3) {\n  var oldPlaylists = _ref3.oldPlaylists,\n      newPlaylists = _ref3.newPlaylists,\n      timelineStarts = _ref3.timelineStarts;\n  newPlaylists.forEach(function (playlist) {\n    playlist.discontinuitySequence = findIndex(timelineStarts, function (_ref4) {\n      var timeline = _ref4.timeline;\n      return timeline === playlist.timeline;\n    }); // Playlists NAMEs come from DASH Representation IDs, which are mandatory\n    // (see ISO_23009-1-2012 5.3.5.2).\n    //\n    // If the same Representation existed in a prior Period, it will retain the same NAME.\n\n    var oldPlaylist = findPlaylistWithName(oldPlaylists, playlist.attributes.NAME);\n\n    if (!oldPlaylist) {\n      // Since this is a new playlist, the media sequence values can start from 0 without\n      // consequence.\n      return;\n    } // TODO better support for live SIDX\n    //\n    // As of this writing, mpd-parser does not support multiperiod SIDX (in live or VOD).\n    // This is evident by a playlist only having a single SIDX reference. In a multiperiod\n    // playlist there would need to be multiple SIDX references. In addition, live SIDX is\n    // not supported when the SIDX properties change on refreshes.\n    //\n    // In the future, if support needs to be added, the merging logic here can be called\n    // after SIDX references are resolved. For now, exit early to prevent exceptions being\n    // thrown due to undefined references.\n\n\n    if (playlist.sidx) {\n      return;\n    } // Since we don't yet support early available timelines, we don't need to support\n    // playlists with no segments.\n\n\n    var firstNewSegment = playlist.segments[0];\n    var oldMatchingSegmentIndex = findIndex(oldPlaylist.segments, function (oldSegment) {\n      return Math.abs(oldSegment.presentationTime - firstNewSegment.presentationTime) < TIME_FUDGE;\n    }); // No matching segment from the old playlist means the entire playlist was refreshed.\n    // In this case the media sequence should account for this update, and the new segments\n    // should be marked as discontinuous from the prior content, since the last prior\n    // timeline was removed.\n\n    if (oldMatchingSegmentIndex === -1) {\n      updateMediaSequenceForPlaylist({\n        playlist: playlist,\n        mediaSequence: oldPlaylist.mediaSequence + oldPlaylist.segments.length\n      });\n      playlist.segments[0].discontinuity = true;\n      playlist.discontinuityStarts.unshift(0); // No matching segment does not necessarily mean there's missing content.\n      //\n      // If the new playlist's timeline is the same as the last seen segment's timeline,\n      // then a discontinuity can be added to identify that there's potentially missing\n      // content. If there's no missing content, the discontinuity should still be rather\n      // harmless. It's possible that if segment durations are accurate enough, that the\n      // existence of a gap can be determined using the presentation times and durations,\n      // but if the segment timing info is off, it may introduce more problems than simply\n      // adding the discontinuity.\n      //\n      // If the new playlist's timeline is different from the last seen segment's timeline,\n      // then a discontinuity can be added to identify that this is the first seen segment\n      // of a new timeline. However, the logic at the start of this function that\n      // determined the disconinuity sequence by timeline index is now off by one (the\n      // discontinuity of the newest timeline hasn't yet fallen off the manifest...since\n      // we added it), so the disconinuity sequence must be decremented.\n      //\n      // A period may also have a duration of zero, so the case of no segments is handled\n      // here even though we don't yet support early available periods.\n\n      if (!oldPlaylist.segments.length && playlist.timeline > oldPlaylist.timeline || oldPlaylist.segments.length && playlist.timeline > oldPlaylist.segments[oldPlaylist.segments.length - 1].timeline) {\n        playlist.discontinuitySequence--;\n      }\n\n      return;\n    } // If the first segment matched with a prior segment on a discontinuity (it's matching\n    // on the first segment of a period), then the discontinuitySequence shouldn't be the\n    // timeline's matching one, but instead should be the one prior, and the first segment\n    // of the new manifest should be marked with a discontinuity.\n    //\n    // The reason for this special case is that discontinuity sequence shows how many\n    // discontinuities have fallen off of the playlist, and discontinuities are marked on\n    // the first segment of a new \"timeline.\" Because of this, while DASH will retain that\n    // Period while the \"timeline\" exists, HLS keeps track of it via the discontinuity\n    // sequence, and that first segment is an indicator, but can be removed before that\n    // timeline is gone.\n\n\n    var oldMatchingSegment = oldPlaylist.segments[oldMatchingSegmentIndex];\n\n    if (oldMatchingSegment.discontinuity && !firstNewSegment.discontinuity) {\n      firstNewSegment.discontinuity = true;\n      playlist.discontinuityStarts.unshift(0);\n      playlist.discontinuitySequence--;\n    }\n\n    updateMediaSequenceForPlaylist({\n      playlist: playlist,\n      mediaSequence: oldPlaylist.segments[oldMatchingSegmentIndex].number\n    });\n  });\n};\n/**\n * Given an old parsed manifest object and a new parsed manifest object, updates the\n * sequence and timing values within the new manifest to ensure that it lines up with the\n * old.\n *\n * @param {Array} oldManifest - the old main manifest object\n * @param {Array} newManifest - the new main manifest object\n *\n * @return {Object} the updated new manifest object\n */\n\nvar positionManifestOnTimeline = function positionManifestOnTimeline(_ref5) {\n  var oldManifest = _ref5.oldManifest,\n      newManifest = _ref5.newManifest;\n  // Starting from v4.1.2 of the IOP, section 4.4.3.3 states:\n  //\n  // \"MPD@availabilityStartTime and Period@start shall not be changed over MPD updates.\"\n  //\n  // This was added from https://github.com/Dash-Industry-Forum/DASH-IF-IOP/issues/160\n  //\n  // Because of this change, and the difficulty of supporting periods with changing start\n  // times, periods with changing start times are not supported. This makes the logic much\n  // simpler, since periods with the same start time can be considerred the same period\n  // across refreshes.\n  //\n  // To give an example as to the difficulty of handling periods where the start time may\n  // change, if a single period manifest is refreshed with another manifest with a single\n  // period, and both the start and end times are increased, then the only way to determine\n  // if it's a new period or an old one that has changed is to look through the segments of\n  // each playlist and determine the presentation time bounds to find a match. In addition,\n  // if the period start changed to exceed the old period end, then there would be no\n  // match, and it would not be possible to determine whether the refreshed period is a new\n  // one or the old one.\n  var oldPlaylists = oldManifest.playlists.concat(getMediaGroupPlaylists(oldManifest));\n  var newPlaylists = newManifest.playlists.concat(getMediaGroupPlaylists(newManifest)); // Save all seen timelineStarts to the new manifest. Although this potentially means that\n  // there's a \"memory leak\" in that it will never stop growing, in reality, only a couple\n  // of properties are saved for each seen Period. Even long running live streams won't\n  // generate too many Periods, unless the stream is watched for decades. In the future,\n  // this can be optimized by mapping to discontinuity sequence numbers for each timeline,\n  // but it may not become an issue, and the additional info can be useful for debugging.\n\n  newManifest.timelineStarts = getUniqueTimelineStarts([oldManifest.timelineStarts, newManifest.timelineStarts]);\n  updateSequenceNumbers({\n    oldPlaylists: oldPlaylists,\n    newPlaylists: newPlaylists,\n    timelineStarts: newManifest.timelineStarts\n  });\n  return newManifest;\n};\n\nvar generateSidxKey = function generateSidxKey(sidx) {\n  return sidx && sidx.uri + '-' + byteRangeToString(sidx.byterange);\n};\n\nvar mergeDiscontiguousPlaylists = function mergeDiscontiguousPlaylists(playlists) {\n  var mergedPlaylists = values(playlists.reduce(function (acc, playlist) {\n    // assuming playlist IDs are the same across periods\n    // TODO: handle multiperiod where representation sets are not the same\n    // across periods\n    var name = playlist.attributes.id + (playlist.attributes.lang || '');\n\n    if (!acc[name]) {\n      // First Period\n      acc[name] = playlist;\n      acc[name].attributes.timelineStarts = [];\n    } else {\n      // Subsequent Periods\n      if (playlist.segments) {\n        var _acc$name$segments;\n\n        // first segment of subsequent periods signal a discontinuity\n        if (playlist.segments[0]) {\n          playlist.segments[0].discontinuity = true;\n        }\n\n        (_acc$name$segments = acc[name].segments).push.apply(_acc$name$segments, playlist.segments);\n      } // bubble up contentProtection, this assumes all DRM content\n      // has the same contentProtection\n\n\n      if (playlist.attributes.contentProtection) {\n        acc[name].attributes.contentProtection = playlist.attributes.contentProtection;\n      }\n    }\n\n    acc[name].attributes.timelineStarts.push({\n      // Although they represent the same number, it's important to have both to make it\n      // compatible with HLS potentially having a similar attribute.\n      start: playlist.attributes.periodStart,\n      timeline: playlist.attributes.periodStart\n    });\n    return acc;\n  }, {}));\n  return mergedPlaylists.map(function (playlist) {\n    playlist.discontinuityStarts = findIndexes(playlist.segments || [], 'discontinuity');\n    return playlist;\n  });\n};\n\nvar addSidxSegmentsToPlaylist = function addSidxSegmentsToPlaylist(playlist, sidxMapping) {\n  var sidxKey = generateSidxKey(playlist.sidx);\n  var sidxMatch = sidxKey && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx;\n\n  if (sidxMatch) {\n    addSidxSegmentsToPlaylist$1(playlist, sidxMatch, playlist.sidx.resolvedUri);\n  }\n\n  return playlist;\n};\nvar addSidxSegmentsToPlaylists = function addSidxSegmentsToPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (!Object.keys(sidxMapping).length) {\n    return playlists;\n  }\n\n  for (var i in playlists) {\n    playlists[i] = addSidxSegmentsToPlaylist(playlists[i], sidxMapping);\n  }\n\n  return playlists;\n};\nvar formatAudioPlaylist = function formatAudioPlaylist(_ref, isAudioOnly) {\n  var _attributes;\n\n  var attributes = _ref.attributes,\n      segments = _ref.segments,\n      sidx = _ref.sidx,\n      mediaSequence = _ref.mediaSequence,\n      discontinuitySequence = _ref.discontinuitySequence,\n      discontinuityStarts = _ref.discontinuityStarts;\n  var playlist = {\n    attributes: (_attributes = {\n      NAME: attributes.id,\n      BANDWIDTH: attributes.bandwidth,\n      CODECS: attributes.codecs\n    }, _attributes['PROGRAM-ID'] = 1, _attributes),\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    discontinuitySequence: discontinuitySequence,\n    discontinuityStarts: discontinuityStarts,\n    timelineStarts: attributes.timelineStarts,\n    mediaSequence: mediaSequence,\n    segments: segments\n  };\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  if (isAudioOnly) {\n    playlist.attributes.AUDIO = 'audio';\n    playlist.attributes.SUBTITLES = 'subs';\n  }\n\n  return playlist;\n};\nvar formatVttPlaylist = function formatVttPlaylist(_ref2) {\n  var _m3u8Attributes;\n\n  var attributes = _ref2.attributes,\n      segments = _ref2.segments,\n      mediaSequence = _ref2.mediaSequence,\n      discontinuityStarts = _ref2.discontinuityStarts,\n      discontinuitySequence = _ref2.discontinuitySequence;\n\n  if (typeof segments === 'undefined') {\n    // vtt tracks may use single file in BaseURL\n    segments = [{\n      uri: attributes.baseUrl,\n      timeline: attributes.periodStart,\n      resolvedUri: attributes.baseUrl || '',\n      duration: attributes.sourceDuration,\n      number: 0\n    }]; // targetDuration should be the same duration as the only segment\n\n    attributes.duration = attributes.sourceDuration;\n  }\n\n  var m3u8Attributes = (_m3u8Attributes = {\n    NAME: attributes.id,\n    BANDWIDTH: attributes.bandwidth\n  }, _m3u8Attributes['PROGRAM-ID'] = 1, _m3u8Attributes);\n\n  if (attributes.codecs) {\n    m3u8Attributes.CODECS = attributes.codecs;\n  }\n\n  return {\n    attributes: m3u8Attributes,\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: attributes.baseUrl || '',\n    targetDuration: attributes.duration,\n    timelineStarts: attributes.timelineStarts,\n    discontinuityStarts: discontinuityStarts,\n    discontinuitySequence: discontinuitySequence,\n    mediaSequence: mediaSequence,\n    segments: segments\n  };\n};\nvar organizeAudioPlaylists = function organizeAudioPlaylists(playlists, sidxMapping, isAudioOnly) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  if (isAudioOnly === void 0) {\n    isAudioOnly = false;\n  }\n\n  var mainPlaylist;\n  var formattedPlaylists = playlists.reduce(function (a, playlist) {\n    var role = playlist.attributes.role && playlist.attributes.role.value || '';\n    var language = playlist.attributes.lang || '';\n    var label = playlist.attributes.label || 'main';\n\n    if (language && !playlist.attributes.label) {\n      var roleLabel = role ? \" (\" + role + \")\" : '';\n      label = \"\" + playlist.attributes.lang + roleLabel;\n    }\n\n    if (!a[label]) {\n      a[label] = {\n        language: language,\n        autoselect: true,\n        default: role === 'main',\n        playlists: [],\n        uri: ''\n      };\n    }\n\n    var formatted = addSidxSegmentsToPlaylist(formatAudioPlaylist(playlist, isAudioOnly), sidxMapping);\n    a[label].playlists.push(formatted);\n\n    if (typeof mainPlaylist === 'undefined' && role === 'main') {\n      mainPlaylist = playlist;\n      mainPlaylist.default = true;\n    }\n\n    return a;\n  }, {}); // if no playlists have role \"main\", mark the first as main\n\n  if (!mainPlaylist) {\n    var firstLabel = Object.keys(formattedPlaylists)[0];\n    formattedPlaylists[firstLabel].default = true;\n  }\n\n  return formattedPlaylists;\n};\nvar organizeVttPlaylists = function organizeVttPlaylists(playlists, sidxMapping) {\n  if (sidxMapping === void 0) {\n    sidxMapping = {};\n  }\n\n  return playlists.reduce(function (a, playlist) {\n    var label = playlist.attributes.lang || 'text';\n\n    if (!a[label]) {\n      a[label] = {\n        language: label,\n        default: false,\n        autoselect: false,\n        playlists: [],\n        uri: ''\n      };\n    }\n\n    a[label].playlists.push(addSidxSegmentsToPlaylist(formatVttPlaylist(playlist), sidxMapping));\n    return a;\n  }, {});\n};\n\nvar organizeCaptionServices = function organizeCaptionServices(captionServices) {\n  return captionServices.reduce(function (svcObj, svc) {\n    if (!svc) {\n      return svcObj;\n    }\n\n    svc.forEach(function (service) {\n      var channel = service.channel,\n          language = service.language;\n      svcObj[language] = {\n        autoselect: false,\n        default: false,\n        instreamId: channel,\n        language: language\n      };\n\n      if (service.hasOwnProperty('aspectRatio')) {\n        svcObj[language].aspectRatio = service.aspectRatio;\n      }\n\n      if (service.hasOwnProperty('easyReader')) {\n        svcObj[language].easyReader = service.easyReader;\n      }\n\n      if (service.hasOwnProperty('3D')) {\n        svcObj[language]['3D'] = service['3D'];\n      }\n    });\n    return svcObj;\n  }, {});\n};\n\nvar formatVideoPlaylist = function formatVideoPlaylist(_ref3) {\n  var _attributes2;\n\n  var attributes = _ref3.attributes,\n      segments = _ref3.segments,\n      sidx = _ref3.sidx,\n      discontinuityStarts = _ref3.discontinuityStarts;\n  var playlist = {\n    attributes: (_attributes2 = {\n      NAME: attributes.id,\n      AUDIO: 'audio',\n      SUBTITLES: 'subs',\n      RESOLUTION: {\n        width: attributes.width,\n        height: attributes.height\n      },\n      CODECS: attributes.codecs,\n      BANDWIDTH: attributes.bandwidth\n    }, _attributes2['PROGRAM-ID'] = 1, _attributes2),\n    uri: '',\n    endList: attributes.type === 'static',\n    timeline: attributes.periodStart,\n    resolvedUri: '',\n    targetDuration: attributes.duration,\n    discontinuityStarts: discontinuityStarts,\n    timelineStarts: attributes.timelineStarts,\n    segments: segments\n  };\n\n  if (attributes.frameRate) {\n    playlist.attributes['FRAME-RATE'] = attributes.frameRate;\n  }\n\n  if (attributes.contentProtection) {\n    playlist.contentProtection = attributes.contentProtection;\n  }\n\n  if (sidx) {\n    playlist.sidx = sidx;\n  }\n\n  return playlist;\n};\n\nvar videoOnly = function videoOnly(_ref4) {\n  var attributes = _ref4.attributes;\n  return attributes.mimeType === 'video/mp4' || attributes.mimeType === 'video/webm' || attributes.contentType === 'video';\n};\n\nvar audioOnly = function audioOnly(_ref5) {\n  var attributes = _ref5.attributes;\n  return attributes.mimeType === 'audio/mp4' || attributes.mimeType === 'audio/webm' || attributes.contentType === 'audio';\n};\n\nvar vttOnly = function vttOnly(_ref6) {\n  var attributes = _ref6.attributes;\n  return attributes.mimeType === 'text/vtt' || attributes.contentType === 'text';\n};\n/**\n * Contains start and timeline properties denoting a timeline start. For DASH, these will\n * be the same number.\n *\n * @typedef {Object} TimelineStart\n * @property {number} start - the start time of the timeline\n * @property {number} timeline - the timeline number\n */\n\n/**\n * Adds appropriate media and discontinuity sequence values to the segments and playlists.\n *\n * Throughout mpd-parser, the `number` attribute is used in relation to `startNumber`, a\n * DASH specific attribute used in constructing segment URI's from templates. However, from\n * an HLS perspective, the `number` attribute on a segment would be its `mediaSequence`\n * value, which should start at the original media sequence value (or 0) and increment by 1\n * for each segment thereafter. Since DASH's `startNumber` values are independent per\n * period, it doesn't make sense to use it for `number`. Instead, assume everything starts\n * from a 0 mediaSequence value and increment from there.\n *\n * Note that VHS currently doesn't use the `number` property, but it can be helpful for\n * debugging and making sense of the manifest.\n *\n * For live playlists, to account for values increasing in manifests when periods are\n * removed on refreshes, merging logic should be used to update the numbers to their\n * appropriate values (to ensure they're sequential and increasing).\n *\n * @param {Object[]} playlists - the playlists to update\n * @param {TimelineStart[]} timelineStarts - the timeline starts for the manifest\n */\n\n\nvar addMediaSequenceValues = function addMediaSequenceValues(playlists, timelineStarts) {\n  // increment all segments sequentially\n  playlists.forEach(function (playlist) {\n    playlist.mediaSequence = 0;\n    playlist.discontinuitySequence = findIndex(timelineStarts, function (_ref7) {\n      var timeline = _ref7.timeline;\n      return timeline === playlist.timeline;\n    });\n\n    if (!playlist.segments) {\n      return;\n    }\n\n    playlist.segments.forEach(function (segment, index) {\n      segment.number = index;\n    });\n  });\n};\n/**\n * Given a media group object, flattens all playlists within the media group into a single\n * array.\n *\n * @param {Object} mediaGroupObject - the media group object\n *\n * @return {Object[]}\n *         The media group playlists\n */\n\nvar flattenMediaGroupPlaylists = function flattenMediaGroupPlaylists(mediaGroupObject) {\n  if (!mediaGroupObject) {\n    return [];\n  }\n\n  return Object.keys(mediaGroupObject).reduce(function (acc, label) {\n    var labelContents = mediaGroupObject[label];\n    return acc.concat(labelContents.playlists);\n  }, []);\n};\nvar toM3u8 = function toM3u8(_ref8) {\n  var _mediaGroups;\n\n  var dashPlaylists = _ref8.dashPlaylists,\n      locations = _ref8.locations,\n      _ref8$sidxMapping = _ref8.sidxMapping,\n      sidxMapping = _ref8$sidxMapping === void 0 ? {} : _ref8$sidxMapping,\n      previousManifest = _ref8.previousManifest;\n\n  if (!dashPlaylists.length) {\n    return {};\n  } // grab all main manifest attributes\n\n\n  var _dashPlaylists$0$attr = dashPlaylists[0].attributes,\n      duration = _dashPlaylists$0$attr.sourceDuration,\n      type = _dashPlaylists$0$attr.type,\n      suggestedPresentationDelay = _dashPlaylists$0$attr.suggestedPresentationDelay,\n      minimumUpdatePeriod = _dashPlaylists$0$attr.minimumUpdatePeriod;\n  var videoPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(videoOnly)).map(formatVideoPlaylist);\n  var audioPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(audioOnly));\n  var vttPlaylists = mergeDiscontiguousPlaylists(dashPlaylists.filter(vttOnly));\n  var captions = dashPlaylists.map(function (playlist) {\n    return playlist.attributes.captionServices;\n  }).filter(Boolean);\n  var manifest = {\n    allowCache: true,\n    discontinuityStarts: [],\n    segments: [],\n    endList: true,\n    mediaGroups: (_mediaGroups = {\n      AUDIO: {},\n      VIDEO: {}\n    }, _mediaGroups['CLOSED-CAPTIONS'] = {}, _mediaGroups.SUBTITLES = {}, _mediaGroups),\n    uri: '',\n    duration: duration,\n    playlists: addSidxSegmentsToPlaylists(videoPlaylists, sidxMapping)\n  };\n\n  if (minimumUpdatePeriod >= 0) {\n    manifest.minimumUpdatePeriod = minimumUpdatePeriod * 1000;\n  }\n\n  if (locations) {\n    manifest.locations = locations;\n  }\n\n  if (type === 'dynamic') {\n    manifest.suggestedPresentationDelay = suggestedPresentationDelay;\n  }\n\n  var isAudioOnly = manifest.playlists.length === 0;\n  var organizedAudioGroup = audioPlaylists.length ? organizeAudioPlaylists(audioPlaylists, sidxMapping, isAudioOnly) : null;\n  var organizedVttGroup = vttPlaylists.length ? organizeVttPlaylists(vttPlaylists, sidxMapping) : null;\n  var formattedPlaylists = videoPlaylists.concat(flattenMediaGroupPlaylists(organizedAudioGroup), flattenMediaGroupPlaylists(organizedVttGroup));\n  var playlistTimelineStarts = formattedPlaylists.map(function (_ref9) {\n    var timelineStarts = _ref9.timelineStarts;\n    return timelineStarts;\n  });\n  manifest.timelineStarts = getUniqueTimelineStarts(playlistTimelineStarts);\n  addMediaSequenceValues(formattedPlaylists, manifest.timelineStarts);\n\n  if (organizedAudioGroup) {\n    manifest.mediaGroups.AUDIO.audio = organizedAudioGroup;\n  }\n\n  if (organizedVttGroup) {\n    manifest.mediaGroups.SUBTITLES.subs = organizedVttGroup;\n  }\n\n  if (captions.length) {\n    manifest.mediaGroups['CLOSED-CAPTIONS'].cc = organizeCaptionServices(captions);\n  }\n\n  if (previousManifest) {\n    return positionManifestOnTimeline({\n      oldManifest: previousManifest,\n      newManifest: manifest\n    });\n  }\n\n  return manifest;\n};\n\n/**\n * Calculates the R (repetition) value for a live stream (for the final segment\n * in a manifest where the r value is negative 1)\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {number} time\n *        current time (typically the total time up until the final segment)\n * @param {number} duration\n *        duration property for the given <S />\n *\n * @return {number}\n *        R value to reach the end of the given period\n */\nvar getLiveRValue = function getLiveRValue(attributes, time, duration) {\n  var NOW = attributes.NOW,\n      clientOffset = attributes.clientOffset,\n      availabilityStartTime = attributes.availabilityStartTime,\n      _attributes$timescale = attributes.timescale,\n      timescale = _attributes$timescale === void 0 ? 1 : _attributes$timescale,\n      _attributes$periodSta = attributes.periodStart,\n      periodStart = _attributes$periodSta === void 0 ? 0 : _attributes$periodSta,\n      _attributes$minimumUp = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp === void 0 ? 0 : _attributes$minimumUp;\n  var now = (NOW + clientOffset) / 1000;\n  var periodStartWC = availabilityStartTime + periodStart;\n  var periodEndWC = now + minimumUpdatePeriod;\n  var periodDuration = periodEndWC - periodStartWC;\n  return Math.ceil((periodDuration * timescale - time) / duration);\n};\n/**\n * Uses information provided by SegmentTemplate.SegmentTimeline to determine segment\n * timing and duration\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\n\nvar parseByTimeline = function parseByTimeline(attributes, segmentTimeline) {\n  var type = attributes.type,\n      _attributes$minimumUp2 = attributes.minimumUpdatePeriod,\n      minimumUpdatePeriod = _attributes$minimumUp2 === void 0 ? 0 : _attributes$minimumUp2,\n      _attributes$media = attributes.media,\n      media = _attributes$media === void 0 ? '' : _attributes$media,\n      sourceDuration = attributes.sourceDuration,\n      _attributes$timescale2 = attributes.timescale,\n      timescale = _attributes$timescale2 === void 0 ? 1 : _attributes$timescale2,\n      _attributes$startNumb = attributes.startNumber,\n      startNumber = _attributes$startNumb === void 0 ? 1 : _attributes$startNumb,\n      timeline = attributes.periodStart;\n  var segments = [];\n  var time = -1;\n\n  for (var sIndex = 0; sIndex < segmentTimeline.length; sIndex++) {\n    var S = segmentTimeline[sIndex];\n    var duration = S.d;\n    var repeat = S.r || 0;\n    var segmentTime = S.t || 0;\n\n    if (time < 0) {\n      // first segment\n      time = segmentTime;\n    }\n\n    if (segmentTime && segmentTime > time) {\n      // discontinuity\n      // TODO: How to handle this type of discontinuity\n      // timeline++ here would treat it like HLS discontuity and content would\n      // get appended without gap\n      // E.G.\n      //  <S t=\"0\" d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S d=\"1\" />\n      //  <S t=\"5\" d=\"1\" />\n      // would have $Time$ values of [0, 1, 2, 5]\n      // should this be appened at time positions [0, 1, 2, 3],(#EXT-X-DISCONTINUITY)\n      // or [0, 1, 2, gap, gap, 5]? (#EXT-X-GAP)\n      // does the value of sourceDuration consider this when calculating arbitrary\n      // negative @r repeat value?\n      // E.G. Same elements as above with this added at the end\n      //  <S d=\"1\" r=\"-1\" />\n      //  with a sourceDuration of 10\n      // Would the 2 gaps be included in the time duration calculations resulting in\n      // 8 segments with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9] or 10 segments\n      // with $Time$ values of [0, 1, 2, 5, 6, 7, 8, 9, 10, 11] ?\n      time = segmentTime;\n    }\n\n    var count = void 0;\n\n    if (repeat < 0) {\n      var nextS = sIndex + 1;\n\n      if (nextS === segmentTimeline.length) {\n        // last segment\n        if (type === 'dynamic' && minimumUpdatePeriod > 0 && media.indexOf('$Number$') > 0) {\n          count = getLiveRValue(attributes, time, duration);\n        } else {\n          // TODO: This may be incorrect depending on conclusion of TODO above\n          count = (sourceDuration * timescale - time) / duration;\n        }\n      } else {\n        count = (segmentTimeline[nextS].t - time) / duration;\n      }\n    } else {\n      count = repeat + 1;\n    }\n\n    var end = startNumber + segments.length + count;\n    var number = startNumber + segments.length;\n\n    while (number < end) {\n      segments.push({\n        number: number,\n        duration: duration / timescale,\n        time: time,\n        timeline: timeline\n      });\n      time += duration;\n      number++;\n    }\n  }\n\n  return segments;\n};\n\nvar identifierPattern = /\\$([A-z]*)(?:(%0)([0-9]+)d)?\\$/g;\n/**\n * Replaces template identifiers with corresponding values. To be used as the callback\n * for String.prototype.replace\n *\n * @name replaceCallback\n * @function\n * @param {string} match\n *        Entire match of identifier\n * @param {string} identifier\n *        Name of matched identifier\n * @param {string} format\n *        Format tag string. Its presence indicates that padding is expected\n * @param {string} width\n *        Desired length of the replaced value. Values less than this width shall be left\n *        zero padded\n * @return {string}\n *         Replacement for the matched identifier\n */\n\n/**\n * Returns a function to be used as a callback for String.prototype.replace to replace\n * template identifiers\n *\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {replaceCallback}\n *         Callback to be used with String.prototype.replace to replace identifiers\n */\n\nvar identifierReplacement = function identifierReplacement(values) {\n  return function (match, identifier, format, width) {\n    if (match === '$$') {\n      // escape sequence\n      return '$';\n    }\n\n    if (typeof values[identifier] === 'undefined') {\n      return match;\n    }\n\n    var value = '' + values[identifier];\n\n    if (identifier === 'RepresentationID') {\n      // Format tag shall not be present with RepresentationID\n      return value;\n    }\n\n    if (!format) {\n      width = 1;\n    } else {\n      width = parseInt(width, 10);\n    }\n\n    if (value.length >= width) {\n      return value;\n    }\n\n    return \"\" + new Array(width - value.length + 1).join('0') + value;\n  };\n};\n/**\n * Constructs a segment url from a template string\n *\n * @param {string} url\n *        Template string to construct url from\n * @param {Obect} values\n *        Object containing values that shall be used to replace known identifiers\n * @param {number} values.RepresentationID\n *        Value of the Representation@id attribute\n * @param {number} values.Number\n *        Number of the corresponding segment\n * @param {number} values.Bandwidth\n *        Value of the Representation@bandwidth attribute.\n * @param {number} values.Time\n *        Timestamp value of the corresponding segment\n * @return {string}\n *         Segment url with identifiers replaced\n */\n\nvar constructTemplateUrl = function constructTemplateUrl(url, values) {\n  return url.replace(identifierPattern, identifierReplacement(values));\n};\n/**\n * Generates a list of objects containing timing and duration information about each\n * segment needed to generate segment uris and the complete segment object\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {{number: number, duration: number, time: number, timeline: number}[]}\n *         List of Objects with segment timing and duration info\n */\n\nvar parseTemplateInfo = function parseTemplateInfo(attributes, segmentTimeline) {\n  if (!attributes.duration && !segmentTimeline) {\n    // if neither @duration or SegmentTimeline are present, then there shall be exactly\n    // one media segment\n    return [{\n      number: attributes.startNumber || 1,\n      duration: attributes.sourceDuration,\n      time: 0,\n      timeline: attributes.periodStart\n    }];\n  }\n\n  if (attributes.duration) {\n    return parseByDuration(attributes);\n  }\n\n  return parseByTimeline(attributes, segmentTimeline);\n};\n/**\n * Generates a list of segments using information provided by the SegmentTemplate element\n *\n * @param {Object} attributes\n *        Object containing all inherited attributes from parent elements with attribute\n *        names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object[]}\n *         List of segment objects\n */\n\nvar segmentsFromTemplate = function segmentsFromTemplate(attributes, segmentTimeline) {\n  var templateValues = {\n    RepresentationID: attributes.id,\n    Bandwidth: attributes.bandwidth || 0\n  };\n  var _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {\n    sourceURL: '',\n    range: ''\n  } : _attributes$initializ;\n  var mapSegment = urlTypeToSegment({\n    baseUrl: attributes.baseUrl,\n    source: constructTemplateUrl(initialization.sourceURL, templateValues),\n    range: initialization.range\n  });\n  var segments = parseTemplateInfo(attributes, segmentTimeline);\n  return segments.map(function (segment) {\n    templateValues.Number = segment.number;\n    templateValues.Time = segment.time;\n    var uri = constructTemplateUrl(attributes.media || '', templateValues); // See DASH spec section 5.3.9.2.2\n    // - if timescale isn't present on any level, default to 1.\n\n    var timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n    var presentationTimeOffset = attributes.presentationTimeOffset || 0;\n    var presentationTime = // Even if the @t attribute is not specified for the segment, segment.time is\n    // calculated in mpd-parser prior to this, so it's assumed to be available.\n    attributes.periodStart + (segment.time - presentationTimeOffset) / timescale;\n    var map = {\n      uri: uri,\n      timeline: segment.timeline,\n      duration: segment.duration,\n      resolvedUri: resolveUrl(attributes.baseUrl || '', uri),\n      map: mapSegment,\n      number: segment.number,\n      presentationTime: presentationTime\n    };\n    return map;\n  });\n};\n\n/**\n * Converts a <SegmentUrl> (of type URLType from the DASH spec 5.3.9.2 Table 14)\n * to an object that matches the output of a segment in videojs/mpd-parser\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object} segmentUrl\n *   <SegmentURL> node to translate into a segment object\n * @return {Object} translated segment object\n */\n\nvar SegmentURLToSegmentObject = function SegmentURLToSegmentObject(attributes, segmentUrl) {\n  var baseUrl = attributes.baseUrl,\n      _attributes$initializ = attributes.initialization,\n      initialization = _attributes$initializ === void 0 ? {} : _attributes$initializ;\n  var initSegment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: initialization.sourceURL,\n    range: initialization.range\n  });\n  var segment = urlTypeToSegment({\n    baseUrl: baseUrl,\n    source: segmentUrl.media,\n    range: segmentUrl.mediaRange\n  });\n  segment.map = initSegment;\n  return segment;\n};\n/**\n * Generates a list of segments using information provided by the SegmentList element\n * SegmentList (DASH SPEC Section 5.3.9.3.2) contains a set of <SegmentURL> nodes.  Each\n * node should be translated into segment.\n *\n * @param {Object} attributes\n *   Object containing all inherited attributes from parent elements with attribute\n *   names as keys\n * @param {Object[]|undefined} segmentTimeline\n *        List of objects representing the attributes of each S element contained within\n *        the SegmentTimeline element\n * @return {Object.<Array>} list of segments\n */\n\n\nvar segmentsFromList = function segmentsFromList(attributes, segmentTimeline) {\n  var duration = attributes.duration,\n      _attributes$segmentUr = attributes.segmentUrls,\n      segmentUrls = _attributes$segmentUr === void 0 ? [] : _attributes$segmentUr,\n      periodStart = attributes.periodStart; // Per spec (5.3.9.2.1) no way to determine segment duration OR\n  // if both SegmentTimeline and @duration are defined, it is outside of spec.\n\n  if (!duration && !segmentTimeline || duration && segmentTimeline) {\n    throw new Error(errors.SEGMENT_TIME_UNSPECIFIED);\n  }\n\n  var segmentUrlMap = segmentUrls.map(function (segmentUrlObject) {\n    return SegmentURLToSegmentObject(attributes, segmentUrlObject);\n  });\n  var segmentTimeInfo;\n\n  if (duration) {\n    segmentTimeInfo = parseByDuration(attributes);\n  }\n\n  if (segmentTimeline) {\n    segmentTimeInfo = parseByTimeline(attributes, segmentTimeline);\n  }\n\n  var segments = segmentTimeInfo.map(function (segmentTime, index) {\n    if (segmentUrlMap[index]) {\n      var segment = segmentUrlMap[index]; // See DASH spec section 5.3.9.2.2\n      // - if timescale isn't present on any level, default to 1.\n\n      var timescale = attributes.timescale || 1; // - if presentationTimeOffset isn't present on any level, default to 0\n\n      var presentationTimeOffset = attributes.presentationTimeOffset || 0;\n      segment.timeline = segmentTime.timeline;\n      segment.duration = segmentTime.duration;\n      segment.number = segmentTime.number;\n      segment.presentationTime = periodStart + (segmentTime.time - presentationTimeOffset) / timescale;\n      return segment;\n    } // Since we're mapping we should get rid of any blank segments (in case\n    // the given SegmentTimeline is handling for more elements than we have\n    // SegmentURLs for).\n\n  }).filter(function (segment) {\n    return segment;\n  });\n  return segments;\n};\n\nvar generateSegments = function generateSegments(_ref) {\n  var attributes = _ref.attributes,\n      segmentInfo = _ref.segmentInfo;\n  var segmentAttributes;\n  var segmentsFn;\n\n  if (segmentInfo.template) {\n    segmentsFn = segmentsFromTemplate;\n    segmentAttributes = merge(attributes, segmentInfo.template);\n  } else if (segmentInfo.base) {\n    segmentsFn = segmentsFromBase;\n    segmentAttributes = merge(attributes, segmentInfo.base);\n  } else if (segmentInfo.list) {\n    segmentsFn = segmentsFromList;\n    segmentAttributes = merge(attributes, segmentInfo.list);\n  }\n\n  var segmentsInfo = {\n    attributes: attributes\n  };\n\n  if (!segmentsFn) {\n    return segmentsInfo;\n  }\n\n  var segments = segmentsFn(segmentAttributes, segmentInfo.segmentTimeline); // The @duration attribute will be used to determin the playlist's targetDuration which\n  // must be in seconds. Since we've generated the segment list, we no longer need\n  // @duration to be in @timescale units, so we can convert it here.\n\n  if (segmentAttributes.duration) {\n    var _segmentAttributes = segmentAttributes,\n        duration = _segmentAttributes.duration,\n        _segmentAttributes$ti = _segmentAttributes.timescale,\n        timescale = _segmentAttributes$ti === void 0 ? 1 : _segmentAttributes$ti;\n    segmentAttributes.duration = duration / timescale;\n  } else if (segments.length) {\n    // if there is no @duration attribute, use the largest segment duration as\n    // as target duration\n    segmentAttributes.duration = segments.reduce(function (max, segment) {\n      return Math.max(max, Math.ceil(segment.duration));\n    }, 0);\n  } else {\n    segmentAttributes.duration = 0;\n  }\n\n  segmentsInfo.attributes = segmentAttributes;\n  segmentsInfo.segments = segments; // This is a sidx box without actual segment information\n\n  if (segmentInfo.base && segmentAttributes.indexRange) {\n    segmentsInfo.sidx = segments[0];\n    segmentsInfo.segments = [];\n  }\n\n  return segmentsInfo;\n};\nvar toPlaylists = function toPlaylists(representations) {\n  return representations.map(generateSegments);\n};\n\nvar findChildren = function findChildren(element, name) {\n  return from(element.childNodes).filter(function (_ref) {\n    var tagName = _ref.tagName;\n    return tagName === name;\n  });\n};\nvar getContent = function getContent(element) {\n  return element.textContent.trim();\n};\n\n/**\n * Converts the provided string that may contain a division operation to a number.\n *\n * @param {string} value - the provided string value\n *\n * @return {number} the parsed string value\n */\nvar parseDivisionValue = function parseDivisionValue(value) {\n  return parseFloat(value.split('/').reduce(function (prev, current) {\n    return prev / current;\n  }));\n};\n\nvar parseDuration = function parseDuration(str) {\n  var SECONDS_IN_YEAR = 365 * 24 * 60 * 60;\n  var SECONDS_IN_MONTH = 30 * 24 * 60 * 60;\n  var SECONDS_IN_DAY = 24 * 60 * 60;\n  var SECONDS_IN_HOUR = 60 * 60;\n  var SECONDS_IN_MIN = 60; // P10Y10M10DT10H10M10.1S\n\n  var durationRegex = /P(?:(\\d*)Y)?(?:(\\d*)M)?(?:(\\d*)D)?(?:T(?:(\\d*)H)?(?:(\\d*)M)?(?:([\\d.]*)S)?)?/;\n  var match = durationRegex.exec(str);\n\n  if (!match) {\n    return 0;\n  }\n\n  var _match$slice = match.slice(1),\n      year = _match$slice[0],\n      month = _match$slice[1],\n      day = _match$slice[2],\n      hour = _match$slice[3],\n      minute = _match$slice[4],\n      second = _match$slice[5];\n\n  return parseFloat(year || 0) * SECONDS_IN_YEAR + parseFloat(month || 0) * SECONDS_IN_MONTH + parseFloat(day || 0) * SECONDS_IN_DAY + parseFloat(hour || 0) * SECONDS_IN_HOUR + parseFloat(minute || 0) * SECONDS_IN_MIN + parseFloat(second || 0);\n};\nvar parseDate = function parseDate(str) {\n  // Date format without timezone according to ISO 8601\n  // YYY-MM-DDThh:mm:ss.ssssss\n  var dateRegex = /^\\d+-\\d+-\\d+T\\d+:\\d+:\\d+(\\.\\d+)?$/; // If the date string does not specifiy a timezone, we must specifiy UTC. This is\n  // expressed by ending with 'Z'\n\n  if (dateRegex.test(str)) {\n    str += 'Z';\n  }\n\n  return Date.parse(str);\n};\n\nvar parsers = {\n  /**\n   * Specifies the duration of the entire Media Presentation. Format is a duration string\n   * as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  mediaPresentationDuration: function mediaPresentationDuration(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the Segment availability start time for all Segments referred to in this\n   * MPD. For a dynamic manifest, it specifies the anchor for the earliest availability\n   * time. Format is a date string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The date as seconds from unix epoch\n   */\n  availabilityStartTime: function availabilityStartTime(value) {\n    return parseDate(value) / 1000;\n  },\n\n  /**\n   * Specifies the smallest period between potential changes to the MPD. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  minimumUpdatePeriod: function minimumUpdatePeriod(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the suggested presentation delay. Format is a\n   * duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  suggestedPresentationDelay: function suggestedPresentationDelay(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * specifices the type of mpd. Can be either \"static\" or \"dynamic\"\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   *\n   * @return {string}\n   *         The type as a string\n   */\n  type: function type(value) {\n    return value;\n  },\n\n  /**\n   * Specifies the duration of the smallest time shifting buffer for any Representation\n   * in the MPD. Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  timeShiftBufferDepth: function timeShiftBufferDepth(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the PeriodStart time of the Period relative to the availabilityStarttime.\n   * Format is a duration string as specified in ISO 8601\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The duration in seconds\n   */\n  start: function start(value) {\n    return parseDuration(value);\n  },\n\n  /**\n   * Specifies the width of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed width\n   */\n  width: function width(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the height of the visual presentation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed height\n   */\n  height: function height(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the bitrate of the representation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed bandwidth\n   */\n  bandwidth: function bandwidth(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the frame rate of the representation\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed frame rate\n   */\n  frameRate: function frameRate(value) {\n    return parseDivisionValue(value);\n  },\n\n  /**\n   * Specifies the number of the first Media Segment in this Representation in the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  startNumber: function startNumber(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the timescale in units per seconds\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed timescale\n   */\n  timescale: function timescale(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the presentationTimeOffset.\n   *\n   * @param {string} value\n   *        value of the attribute as a string\n   *\n   * @return {number}\n   *         The parsed presentationTimeOffset\n   */\n  presentationTimeOffset: function presentationTimeOffset(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the constant approximate Segment duration\n   * NOTE: The <Period> element also contains an @duration attribute. This duration\n   *       specifies the duration of the Period. This attribute is currently not\n   *       supported by the rest of the parser, however we still check for it to prevent\n   *       errors.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  duration: function duration(value) {\n    var parsedValue = parseInt(value, 10);\n\n    if (isNaN(parsedValue)) {\n      return parseDuration(value);\n    }\n\n    return parsedValue;\n  },\n\n  /**\n   * Specifies the Segment duration, in units of the value of the @timescale.\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed duration\n   */\n  d: function d(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the MPD start time, in @timescale units, the first Segment in the series\n   * starts relative to the beginning of the Period\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed time\n   */\n  t: function t(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Specifies the repeat count of the number of following contiguous Segments with the\n   * same duration expressed by the value of @d\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {number}\n   *         The parsed number\n   */\n  r: function r(value) {\n    return parseInt(value, 10);\n  },\n\n  /**\n   * Default parser for all other attributes. Acts as a no-op and just returns the value\n   * as a string\n   *\n   * @param {string} value\n   *        value of attribute as a string\n   * @return {string}\n   *         Unparsed value\n   */\n  DEFAULT: function DEFAULT(value) {\n    return value;\n  }\n};\n/**\n * Gets all the attributes and values of the provided node, parses attributes with known\n * types, and returns an object with attribute names mapped to values.\n *\n * @param {Node} el\n *        The node to parse attributes from\n * @return {Object}\n *         Object with all attributes of el parsed\n */\n\nvar parseAttributes = function parseAttributes(el) {\n  if (!(el && el.attributes)) {\n    return {};\n  }\n\n  return from(el.attributes).reduce(function (a, e) {\n    var parseFn = parsers[e.name] || parsers.DEFAULT;\n    a[e.name] = parseFn(e.value);\n    return a;\n  }, {});\n};\n\nvar keySystemsMap = {\n  'urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b': 'org.w3.clearkey',\n  'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed': 'com.widevine.alpha',\n  'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready',\n  'urn:uuid:f239e769-efa3-4850-9c16-a903c6932efb': 'com.adobe.primetime'\n};\n/**\n * Builds a list of urls that is the product of the reference urls and BaseURL values\n *\n * @param {string[]} referenceUrls\n *        List of reference urls to resolve to\n * @param {Node[]} baseUrlElements\n *        List of BaseURL nodes from the mpd\n * @return {string[]}\n *         List of resolved urls\n */\n\nvar buildBaseUrls = function buildBaseUrls(referenceUrls, baseUrlElements) {\n  if (!baseUrlElements.length) {\n    return referenceUrls;\n  }\n\n  return flatten(referenceUrls.map(function (reference) {\n    return baseUrlElements.map(function (baseUrlElement) {\n      return resolveUrl(reference, getContent(baseUrlElement));\n    });\n  }));\n};\n/**\n * Contains all Segment information for its containing AdaptationSet\n *\n * @typedef {Object} SegmentInformation\n * @property {Object|undefined} template\n *           Contains the attributes for the SegmentTemplate node\n * @property {Object[]|undefined} segmentTimeline\n *           Contains a list of atrributes for each S node within the SegmentTimeline node\n * @property {Object|undefined} list\n *           Contains the attributes for the SegmentList node\n * @property {Object|undefined} base\n *           Contains the attributes for the SegmentBase node\n */\n\n/**\n * Returns all available Segment information contained within the AdaptationSet node\n *\n * @param {Node} adaptationSet\n *        The AdaptationSet node to get Segment information from\n * @return {SegmentInformation}\n *         The Segment information contained within the provided AdaptationSet\n */\n\nvar getSegmentInformation = function getSegmentInformation(adaptationSet) {\n  var segmentTemplate = findChildren(adaptationSet, 'SegmentTemplate')[0];\n  var segmentList = findChildren(adaptationSet, 'SegmentList')[0];\n  var segmentUrls = segmentList && findChildren(segmentList, 'SegmentURL').map(function (s) {\n    return merge({\n      tag: 'SegmentURL'\n    }, parseAttributes(s));\n  });\n  var segmentBase = findChildren(adaptationSet, 'SegmentBase')[0];\n  var segmentTimelineParentNode = segmentList || segmentTemplate;\n  var segmentTimeline = segmentTimelineParentNode && findChildren(segmentTimelineParentNode, 'SegmentTimeline')[0];\n  var segmentInitializationParentNode = segmentList || segmentBase || segmentTemplate;\n  var segmentInitialization = segmentInitializationParentNode && findChildren(segmentInitializationParentNode, 'Initialization')[0]; // SegmentTemplate is handled slightly differently, since it can have both\n  // @initialization and an <Initialization> node.  @initialization can be templated,\n  // while the node can have a url and range specified.  If the <SegmentTemplate> has\n  // both @initialization and an <Initialization> subelement we opt to override with\n  // the node, as this interaction is not defined in the spec.\n\n  var template = segmentTemplate && parseAttributes(segmentTemplate);\n\n  if (template && segmentInitialization) {\n    template.initialization = segmentInitialization && parseAttributes(segmentInitialization);\n  } else if (template && template.initialization) {\n    // If it is @initialization we convert it to an object since this is the format that\n    // later functions will rely on for the initialization segment.  This is only valid\n    // for <SegmentTemplate>\n    template.initialization = {\n      sourceURL: template.initialization\n    };\n  }\n\n  var segmentInfo = {\n    template: template,\n    segmentTimeline: segmentTimeline && findChildren(segmentTimeline, 'S').map(function (s) {\n      return parseAttributes(s);\n    }),\n    list: segmentList && merge(parseAttributes(segmentList), {\n      segmentUrls: segmentUrls,\n      initialization: parseAttributes(segmentInitialization)\n    }),\n    base: segmentBase && merge(parseAttributes(segmentBase), {\n      initialization: parseAttributes(segmentInitialization)\n    })\n  };\n  Object.keys(segmentInfo).forEach(function (key) {\n    if (!segmentInfo[key]) {\n      delete segmentInfo[key];\n    }\n  });\n  return segmentInfo;\n};\n/**\n * Contains Segment information and attributes needed to construct a Playlist object\n * from a Representation\n *\n * @typedef {Object} RepresentationInformation\n * @property {SegmentInformation} segmentInfo\n *           Segment information for this Representation\n * @property {Object} attributes\n *           Inherited attributes for this Representation\n */\n\n/**\n * Maps a Representation node to an object containing Segment information and attributes\n *\n * @name inheritBaseUrlsCallback\n * @function\n * @param {Node} representation\n *        Representation node from the mpd\n * @return {RepresentationInformation}\n *         Representation information needed to construct a Playlist object\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Representation nodes to\n * Segment information and attributes using inherited BaseURL nodes.\n *\n * @param {Object} adaptationSetAttributes\n *        Contains attributes inherited by the AdaptationSet\n * @param {string[]} adaptationSetBaseUrls\n *        Contains list of resolved base urls inherited by the AdaptationSet\n * @param {SegmentInformation} adaptationSetSegmentInfo\n *        Contains Segment information for the AdaptationSet\n * @return {inheritBaseUrlsCallback}\n *         Callback map function\n */\n\nvar inheritBaseUrls = function inheritBaseUrls(adaptationSetAttributes, adaptationSetBaseUrls, adaptationSetSegmentInfo) {\n  return function (representation) {\n    var repBaseUrlElements = findChildren(representation, 'BaseURL');\n    var repBaseUrls = buildBaseUrls(adaptationSetBaseUrls, repBaseUrlElements);\n    var attributes = merge(adaptationSetAttributes, parseAttributes(representation));\n    var representationSegmentInfo = getSegmentInformation(representation);\n    return repBaseUrls.map(function (baseUrl) {\n      return {\n        segmentInfo: merge(adaptationSetSegmentInfo, representationSegmentInfo),\n        attributes: merge(attributes, {\n          baseUrl: baseUrl\n        })\n      };\n    });\n  };\n};\n/**\n * Tranforms a series of content protection nodes to\n * an object containing pssh data by key system\n *\n * @param {Node[]} contentProtectionNodes\n *        Content protection nodes\n * @return {Object}\n *        Object containing pssh data by key system\n */\n\nvar generateKeySystemInformation = function generateKeySystemInformation(contentProtectionNodes) {\n  return contentProtectionNodes.reduce(function (acc, node) {\n    var attributes = parseAttributes(node); // Although it could be argued that according to the UUID RFC spec the UUID string (a-f chars) should be generated\n    // as a lowercase string it also mentions it should be treated as case-insensitive on input. Since the key system\n    // UUIDs in the keySystemsMap are hardcoded as lowercase in the codebase there isn't any reason not to do\n    // .toLowerCase() on the input UUID string from the manifest (at least I could not think of one).\n\n    if (attributes.schemeIdUri) {\n      attributes.schemeIdUri = attributes.schemeIdUri.toLowerCase();\n    }\n\n    var keySystem = keySystemsMap[attributes.schemeIdUri];\n\n    if (keySystem) {\n      acc[keySystem] = {\n        attributes: attributes\n      };\n      var psshNode = findChildren(node, 'cenc:pssh')[0];\n\n      if (psshNode) {\n        var pssh = getContent(psshNode);\n        acc[keySystem].pssh = pssh && decodeB64ToUint8Array(pssh);\n      }\n    }\n\n    return acc;\n  }, {});\n}; // defined in ANSI_SCTE 214-1 2016\n\n\nvar parseCaptionServiceMetadata = function parseCaptionServiceMetadata(service) {\n  // 608 captions\n  if (service.schemeIdUri === 'urn:scte:dash:cc:cea-608:2015') {\n    var values = typeof service.value !== 'string' ? [] : service.value.split(';');\n    return values.map(function (value) {\n      var channel;\n      var language; // default language to value\n\n      language = value;\n\n      if (/^CC\\d=/.test(value)) {\n        var _value$split = value.split('=');\n\n        channel = _value$split[0];\n        language = _value$split[1];\n      } else if (/^CC\\d$/.test(value)) {\n        channel = value;\n      }\n\n      return {\n        channel: channel,\n        language: language\n      };\n    });\n  } else if (service.schemeIdUri === 'urn:scte:dash:cc:cea-708:2015') {\n    var _values = typeof service.value !== 'string' ? [] : service.value.split(';');\n\n    return _values.map(function (value) {\n      var flags = {\n        // service or channel number 1-63\n        'channel': undefined,\n        // language is a 3ALPHA per ISO 639.2/B\n        // field is required\n        'language': undefined,\n        // BIT 1/0 or ?\n        // default value is 1, meaning 16:9 aspect ratio, 0 is 4:3, ? is unknown\n        'aspectRatio': 1,\n        // BIT 1/0\n        // easy reader flag indicated the text is tailed to the needs of beginning readers\n        // default 0, or off\n        'easyReader': 0,\n        // BIT 1/0\n        // If 3d metadata is present (CEA-708.1) then 1\n        // default 0\n        '3D': 0\n      };\n\n      if (/=/.test(value)) {\n        var _value$split2 = value.split('='),\n            channel = _value$split2[0],\n            _value$split2$ = _value$split2[1],\n            opts = _value$split2$ === void 0 ? '' : _value$split2$;\n\n        flags.channel = channel;\n        flags.language = value;\n        opts.split(',').forEach(function (opt) {\n          var _opt$split = opt.split(':'),\n              name = _opt$split[0],\n              val = _opt$split[1];\n\n          if (name === 'lang') {\n            flags.language = val; // er for easyReadery\n          } else if (name === 'er') {\n            flags.easyReader = Number(val); // war for wide aspect ratio\n          } else if (name === 'war') {\n            flags.aspectRatio = Number(val);\n          } else if (name === '3D') {\n            flags['3D'] = Number(val);\n          }\n        });\n      } else {\n        flags.language = value;\n      }\n\n      if (flags.channel) {\n        flags.channel = 'SERVICE' + flags.channel;\n      }\n\n      return flags;\n    });\n  }\n};\n/**\n * Maps an AdaptationSet node to a list of Representation information objects\n *\n * @name toRepresentationsCallback\n * @function\n * @param {Node} adaptationSet\n *        AdaptationSet node from the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping AdaptationSet nodes to a list of\n * Representation information objects\n *\n * @param {Object} periodAttributes\n *        Contains attributes inherited by the Period\n * @param {string[]} periodBaseUrls\n *        Contains list of resolved base urls inherited by the Period\n * @param {string[]} periodSegmentInfo\n *        Contains Segment Information at the period level\n * @return {toRepresentationsCallback}\n *         Callback map function\n */\n\nvar toRepresentations = function toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo) {\n  return function (adaptationSet) {\n    var adaptationSetAttributes = parseAttributes(adaptationSet);\n    var adaptationSetBaseUrls = buildBaseUrls(periodBaseUrls, findChildren(adaptationSet, 'BaseURL'));\n    var role = findChildren(adaptationSet, 'Role')[0];\n    var roleAttributes = {\n      role: parseAttributes(role)\n    };\n    var attrs = merge(periodAttributes, adaptationSetAttributes, roleAttributes);\n    var accessibility = findChildren(adaptationSet, 'Accessibility')[0];\n    var captionServices = parseCaptionServiceMetadata(parseAttributes(accessibility));\n\n    if (captionServices) {\n      attrs = merge(attrs, {\n        captionServices: captionServices\n      });\n    }\n\n    var label = findChildren(adaptationSet, 'Label')[0];\n\n    if (label && label.childNodes.length) {\n      var labelVal = label.childNodes[0].nodeValue.trim();\n      attrs = merge(attrs, {\n        label: labelVal\n      });\n    }\n\n    var contentProtection = generateKeySystemInformation(findChildren(adaptationSet, 'ContentProtection'));\n\n    if (Object.keys(contentProtection).length) {\n      attrs = merge(attrs, {\n        contentProtection: contentProtection\n      });\n    }\n\n    var segmentInfo = getSegmentInformation(adaptationSet);\n    var representations = findChildren(adaptationSet, 'Representation');\n    var adaptationSetSegmentInfo = merge(periodSegmentInfo, segmentInfo);\n    return flatten(representations.map(inheritBaseUrls(attrs, adaptationSetBaseUrls, adaptationSetSegmentInfo)));\n  };\n};\n/**\n * Contains all period information for mapping nodes onto adaptation sets.\n *\n * @typedef {Object} PeriodInformation\n * @property {Node} period.node\n *           Period node from the mpd\n * @property {Object} period.attributes\n *           Parsed period attributes from node plus any added\n */\n\n/**\n * Maps a PeriodInformation object to a list of Representation information objects for all\n * AdaptationSet nodes contained within the Period.\n *\n * @name toAdaptationSetsCallback\n * @function\n * @param {PeriodInformation} period\n *        Period object containing necessary period information\n * @param {number} periodStart\n *        Start time of the Period within the mpd\n * @return {RepresentationInformation[]}\n *         List of objects containing Representaion information\n */\n\n/**\n * Returns a callback for Array.prototype.map for mapping Period nodes to a list of\n * Representation information objects\n *\n * @param {Object} mpdAttributes\n *        Contains attributes inherited by the mpd\n * @param {string[]} mpdBaseUrls\n *        Contains list of resolved base urls inherited by the mpd\n * @return {toAdaptationSetsCallback}\n *         Callback map function\n */\n\nvar toAdaptationSets = function toAdaptationSets(mpdAttributes, mpdBaseUrls) {\n  return function (period, index) {\n    var periodBaseUrls = buildBaseUrls(mpdBaseUrls, findChildren(period.node, 'BaseURL'));\n    var periodAttributes = merge(mpdAttributes, {\n      periodStart: period.attributes.start\n    });\n\n    if (typeof period.attributes.duration === 'number') {\n      periodAttributes.periodDuration = period.attributes.duration;\n    }\n\n    var adaptationSets = findChildren(period.node, 'AdaptationSet');\n    var periodSegmentInfo = getSegmentInformation(period.node);\n    return flatten(adaptationSets.map(toRepresentations(periodAttributes, periodBaseUrls, periodSegmentInfo)));\n  };\n};\n/**\n * Gets Period@start property for a given period.\n *\n * @param {Object} options\n *        Options object\n * @param {Object} options.attributes\n *        Period attributes\n * @param {Object} [options.priorPeriodAttributes]\n *        Prior period attributes (if prior period is available)\n * @param {string} options.mpdType\n *        The MPD@type these periods came from\n * @return {number|null}\n *         The period start, or null if it's an early available period or error\n */\n\nvar getPeriodStart = function getPeriodStart(_ref) {\n  var attributes = _ref.attributes,\n      priorPeriodAttributes = _ref.priorPeriodAttributes,\n      mpdType = _ref.mpdType;\n\n  // Summary of period start time calculation from DASH spec section 5.3.2.1\n  //\n  // A period's start is the first period's start + time elapsed after playing all\n  // prior periods to this one. Periods continue one after the other in time (without\n  // gaps) until the end of the presentation.\n  //\n  // The value of Period@start should be:\n  // 1. if Period@start is present: value of Period@start\n  // 2. if previous period exists and it has @duration: previous Period@start +\n  //    previous Period@duration\n  // 3. if this is first period and MPD@type is 'static': 0\n  // 4. in all other cases, consider the period an \"early available period\" (note: not\n  //    currently supported)\n  // (1)\n  if (typeof attributes.start === 'number') {\n    return attributes.start;\n  } // (2)\n\n\n  if (priorPeriodAttributes && typeof priorPeriodAttributes.start === 'number' && typeof priorPeriodAttributes.duration === 'number') {\n    return priorPeriodAttributes.start + priorPeriodAttributes.duration;\n  } // (3)\n\n\n  if (!priorPeriodAttributes && mpdType === 'static') {\n    return 0;\n  } // (4)\n  // There is currently no logic for calculating the Period@start value if there is\n  // no Period@start or prior Period@start and Period@duration available. This is not made\n  // explicit by the DASH interop guidelines or the DASH spec, however, since there's\n  // nothing about any other resolution strategies, it's implied. Thus, this case should\n  // be considered an early available period, or error, and null should suffice for both\n  // of those cases.\n\n\n  return null;\n};\n/**\n * Traverses the mpd xml tree to generate a list of Representation information objects\n * that have inherited attributes from parent nodes\n *\n * @param {Node} mpd\n *        The root node of the mpd\n * @param {Object} options\n *        Available options for inheritAttributes\n * @param {string} options.manifestUri\n *        The uri source of the mpd\n * @param {number} options.NOW\n *        Current time per DASH IOP.  Default is current time in ms since epoch\n * @param {number} options.clientOffset\n *        Client time difference from NOW (in milliseconds)\n * @return {RepresentationInformation[]}\n *         List of objects containing Representation information\n */\n\nvar inheritAttributes = function inheritAttributes(mpd, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      _options$manifestUri = _options.manifestUri,\n      manifestUri = _options$manifestUri === void 0 ? '' : _options$manifestUri,\n      _options$NOW = _options.NOW,\n      NOW = _options$NOW === void 0 ? Date.now() : _options$NOW,\n      _options$clientOffset = _options.clientOffset,\n      clientOffset = _options$clientOffset === void 0 ? 0 : _options$clientOffset;\n  var periodNodes = findChildren(mpd, 'Period');\n\n  if (!periodNodes.length) {\n    throw new Error(errors.INVALID_NUMBER_OF_PERIOD);\n  }\n\n  var locations = findChildren(mpd, 'Location');\n  var mpdAttributes = parseAttributes(mpd);\n  var mpdBaseUrls = buildBaseUrls([manifestUri], findChildren(mpd, 'BaseURL')); // See DASH spec section 5.3.1.2, Semantics of MPD element. Default type to 'static'.\n\n  mpdAttributes.type = mpdAttributes.type || 'static';\n  mpdAttributes.sourceDuration = mpdAttributes.mediaPresentationDuration || 0;\n  mpdAttributes.NOW = NOW;\n  mpdAttributes.clientOffset = clientOffset;\n\n  if (locations.length) {\n    mpdAttributes.locations = locations.map(getContent);\n  }\n\n  var periods = []; // Since toAdaptationSets acts on individual periods right now, the simplest approach to\n  // adding properties that require looking at prior periods is to parse attributes and add\n  // missing ones before toAdaptationSets is called. If more such properties are added, it\n  // may be better to refactor toAdaptationSets.\n\n  periodNodes.forEach(function (node, index) {\n    var attributes = parseAttributes(node); // Use the last modified prior period, as it may contain added information necessary\n    // for this period.\n\n    var priorPeriod = periods[index - 1];\n    attributes.start = getPeriodStart({\n      attributes: attributes,\n      priorPeriodAttributes: priorPeriod ? priorPeriod.attributes : null,\n      mpdType: mpdAttributes.type\n    });\n    periods.push({\n      node: node,\n      attributes: attributes\n    });\n  });\n  return {\n    locations: mpdAttributes.locations,\n    representationInfo: flatten(periods.map(toAdaptationSets(mpdAttributes, mpdBaseUrls)))\n  };\n};\n\nvar stringToMpdXml = function stringToMpdXml(manifestString) {\n  if (manifestString === '') {\n    throw new Error(errors.DASH_EMPTY_MANIFEST);\n  }\n\n  var parser = new DOMParser();\n  var xml;\n  var mpd;\n\n  try {\n    xml = parser.parseFromString(manifestString, 'application/xml');\n    mpd = xml && xml.documentElement.tagName === 'MPD' ? xml.documentElement : null;\n  } catch (e) {// ie 11 throwsw on invalid xml\n  }\n\n  if (!mpd || mpd && mpd.getElementsByTagName('parsererror').length > 0) {\n    throw new Error(errors.DASH_INVALID_XML);\n  }\n\n  return mpd;\n};\n\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} mpd\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\nvar parseUTCTimingScheme = function parseUTCTimingScheme(mpd) {\n  var UTCTimingNode = findChildren(mpd, 'UTCTiming')[0];\n\n  if (!UTCTimingNode) {\n    return null;\n  }\n\n  var attributes = parseAttributes(UTCTimingNode);\n\n  switch (attributes.schemeIdUri) {\n    case 'urn:mpeg:dash:utc:http-head:2014':\n    case 'urn:mpeg:dash:utc:http-head:2012':\n      attributes.method = 'HEAD';\n      break;\n\n    case 'urn:mpeg:dash:utc:http-xsdate:2014':\n    case 'urn:mpeg:dash:utc:http-iso:2014':\n    case 'urn:mpeg:dash:utc:http-xsdate:2012':\n    case 'urn:mpeg:dash:utc:http-iso:2012':\n      attributes.method = 'GET';\n      break;\n\n    case 'urn:mpeg:dash:utc:direct:2014':\n    case 'urn:mpeg:dash:utc:direct:2012':\n      attributes.method = 'DIRECT';\n      attributes.value = Date.parse(attributes.value);\n      break;\n\n    case 'urn:mpeg:dash:utc:http-ntp:2014':\n    case 'urn:mpeg:dash:utc:ntp:2014':\n    case 'urn:mpeg:dash:utc:sntp:2014':\n    default:\n      throw new Error(errors.UNSUPPORTED_UTC_TIMING_SCHEME);\n  }\n\n  return attributes;\n};\n\nvar VERSION = version;\n/*\n * Given a DASH manifest string and options, parses the DASH manifest into an object in the\n * form outputed by m3u8-parser and accepted by videojs/http-streaming.\n *\n * For live DASH manifests, if `previousManifest` is provided in options, then the newly\n * parsed DASH manifest will have its media sequence and discontinuity sequence values\n * updated to reflect its position relative to the prior manifest.\n *\n * @param {string} manifestString - the DASH manifest as a string\n * @param {options} [options] - any options\n *\n * @return {Object} the manifest object\n */\n\nvar parse = function parse(manifestString, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var parsedManifestInfo = inheritAttributes(stringToMpdXml(manifestString), options);\n  var playlists = toPlaylists(parsedManifestInfo.representationInfo);\n  return toM3u8({\n    dashPlaylists: playlists,\n    locations: parsedManifestInfo.locations,\n    sidxMapping: options.sidxMapping,\n    previousManifest: options.previousManifest\n  });\n};\n/**\n * Parses the manifest for a UTCTiming node, returning the nodes attributes if found\n *\n * @param {string} manifestString\n *        XML string of the MPD manifest\n * @return {Object|null}\n *         Attributes of UTCTiming node specified in the manifest. Null if none found\n */\n\n\nvar parseUTCTiming = function parseUTCTiming(manifestString) {\n  return parseUTCTimingScheme(stringToMpdXml(manifestString));\n};\n\nexport { VERSION, addSidxSegmentsToPlaylist$1 as addSidxSegmentsToPlaylist, generateSidxKey, inheritAttributes, parse, parseUTCTiming, stringToMpdXml, toM3u8, toPlaylists };\n","export var max = Math.max;\nexport var min = Math.min;\nexport var round = Math.round;","'use strict';\n\nconst inherits = require('inherits');\n\nconst DEREncoder = require('./der');\n\nfunction PEMEncoder(entity) {\n  DEREncoder.call(this, entity);\n  this.enc = 'pem';\n}\ninherits(PEMEncoder, DEREncoder);\nmodule.exports = PEMEncoder;\n\nPEMEncoder.prototype.encode = function encode(data, options) {\n  const buf = DEREncoder.prototype.encode.call(this, data);\n\n  const p = buf.toString('base64');\n  const out = [ '-----BEGIN ' + options.label + '-----' ];\n  for (let i = 0; i < p.length; i += 64)\n    out.push(p.slice(i, i + 64));\n  out.push('-----END ' + options.label + '-----');\n  return out.join('\\n');\n};\n","module.exports = function (it) {\n  return typeof it === 'object' ? it !== null : typeof it === 'function';\n};\n","/* eslint-disable node/no-deprecated-api */\nvar buffer = require('buffer')\nvar Buffer = buffer.Buffer\n\n// alternative to using Object.keys for old browsers\nfunction copyProps (src, dst) {\n  for (var key in src) {\n    dst[key] = src[key]\n  }\n}\nif (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {\n  module.exports = buffer\n} else {\n  // Copy properties from require('buffer')\n  copyProps(buffer, exports)\n  exports.Buffer = SafeBuffer\n}\n\nfunction SafeBuffer (arg, encodingOrOffset, length) {\n  return Buffer(arg, encodingOrOffset, length)\n}\n\n// Copy static methods from Buffer\ncopyProps(Buffer, SafeBuffer)\n\nSafeBuffer.from = function (arg, encodingOrOffset, length) {\n  if (typeof arg === 'number') {\n    throw new TypeError('Argument must not be a number')\n  }\n  return Buffer(arg, encodingOrOffset, length)\n}\n\nSafeBuffer.alloc = function (size, fill, encoding) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  var buf = Buffer(size)\n  if (fill !== undefined) {\n    if (typeof encoding === 'string') {\n      buf.fill(fill, encoding)\n    } else {\n      buf.fill(fill)\n    }\n  } else {\n    buf.fill(0)\n  }\n  return buf\n}\n\nSafeBuffer.allocUnsafe = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  return Buffer(size)\n}\n\nSafeBuffer.allocUnsafeSlow = function (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('Argument must be a number')\n  }\n  return buffer.SlowBuffer(size)\n}\n","var store = require('../internals/shared-store');\n\nvar functionToString = Function.toString;\n\n// this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper\nif (typeof store.inspectSource != 'function') {\n  store.inspectSource = function (it) {\n    return functionToString.call(it);\n  };\n}\n\nmodule.exports = store.inspectSource;\n","var MODES = require('./modes')\nvar AuthCipher = require('./authCipher')\nvar Buffer = require('safe-buffer').Buffer\nvar StreamCipher = require('./streamCipher')\nvar Transform = require('cipher-base')\nvar aes = require('./aes')\nvar ebtk = require('evp_bytestokey')\nvar inherits = require('inherits')\n\nfunction Cipher (mode, key, iv) {\n  Transform.call(this)\n\n  this._cache = new Splitter()\n  this._cipher = new aes.AES(key)\n  this._prev = Buffer.from(iv)\n  this._mode = mode\n  this._autopadding = true\n}\n\ninherits(Cipher, Transform)\n\nCipher.prototype._update = function (data) {\n  this._cache.add(data)\n  var chunk\n  var thing\n  var out = []\n\n  while ((chunk = this._cache.get())) {\n    thing = this._mode.encrypt(this, chunk)\n    out.push(thing)\n  }\n\n  return Buffer.concat(out)\n}\n\nvar PADDING = Buffer.alloc(16, 0x10)\n\nCipher.prototype._final = function () {\n  var chunk = this._cache.flush()\n  if (this._autopadding) {\n    chunk = this._mode.encrypt(this, chunk)\n    this._cipher.scrub()\n    return chunk\n  }\n\n  if (!chunk.equals(PADDING)) {\n    this._cipher.scrub()\n    throw new Error('data not multiple of block length')\n  }\n}\n\nCipher.prototype.setAutoPadding = function (setTo) {\n  this._autopadding = !!setTo\n  return this\n}\n\nfunction Splitter () {\n  this.cache = Buffer.allocUnsafe(0)\n}\n\nSplitter.prototype.add = function (data) {\n  this.cache = Buffer.concat([this.cache, data])\n}\n\nSplitter.prototype.get = function () {\n  if (this.cache.length > 15) {\n    var out = this.cache.slice(0, 16)\n    this.cache = this.cache.slice(16)\n    return out\n  }\n  return null\n}\n\nSplitter.prototype.flush = function () {\n  var len = 16 - this.cache.length\n  var padBuff = Buffer.allocUnsafe(len)\n\n  var i = -1\n  while (++i < len) {\n    padBuff.writeUInt8(len, i)\n  }\n\n  return Buffer.concat([this.cache, padBuff])\n}\n\nfunction createCipheriv (suite, password, iv) {\n  var config = MODES[suite.toLowerCase()]\n  if (!config) throw new TypeError('invalid suite type')\n\n  if (typeof password === 'string') password = Buffer.from(password)\n  if (password.length !== config.key / 8) throw new TypeError('invalid key length ' + password.length)\n\n  if (typeof iv === 'string') iv = Buffer.from(iv)\n  if (config.mode !== 'GCM' && iv.length !== config.iv) throw new TypeError('invalid iv length ' + iv.length)\n\n  if (config.type === 'stream') {\n    return new StreamCipher(config.module, password, iv)\n  } else if (config.type === 'auth') {\n    return new AuthCipher(config.module, password, iv)\n  }\n\n  return new Cipher(config.module, password, iv)\n}\n\nfunction createCipher (suite, password) {\n  var config = MODES[suite.toLowerCase()]\n  if (!config) throw new TypeError('invalid suite type')\n\n  var keys = ebtk(password, false, config.key, config.iv)\n  return createCipheriv(suite, keys.key, keys.iv)\n}\n\nexports.createCipheriv = createCipheriv\nexports.createCipher = createCipher\n","'use strict'\n\n/**\n * Ponyfill for `Array.prototype.find` which is only available in ES6 runtimes.\n *\n * Works with anything that has a `length` property and index access properties, including NodeList.\n *\n * @template {unknown} T\n * @param {Array<T> | ({length:number, [number]: T})} list\n * @param {function (item: T, index: number, list:Array<T> | ({length:number, [number]: T})):boolean} predicate\n * @param {Partial<Pick<ArrayConstructor['prototype'], 'find'>>?} ac `Array.prototype` by default,\n * \t\t\t\tallows injecting a custom implementation in tests\n * @returns {T | undefined}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find\n * @see https://tc39.es/ecma262/multipage/indexed-collections.html#sec-array.prototype.find\n */\nfunction find(list, predicate, ac) {\n\tif (ac === undefined) {\n\t\tac = Array.prototype;\n\t}\n\tif (list && typeof ac.find === 'function') {\n\t\treturn ac.find.call(list, predicate);\n\t}\n\tfor (var i = 0; i < list.length; i++) {\n\t\tif (Object.prototype.hasOwnProperty.call(list, i)) {\n\t\t\tvar item = list[i];\n\t\t\tif (predicate.call(undefined, item, i, list)) {\n\t\t\t\treturn item;\n\t\t\t}\n\t\t}\n\t}\n}\n\n/**\n * \"Shallow freezes\" an object to render it immutable.\n * Uses `Object.freeze` if available,\n * otherwise the immutability is only in the type.\n *\n * Is used to create \"enum like\" objects.\n *\n * @template T\n * @param {T} object the object to freeze\n * @param {Pick<ObjectConstructor, 'freeze'> = Object} oc `Object` by default,\n * \t\t\t\tallows to inject custom object constructor for tests\n * @returns {Readonly<T>}\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze\n */\nfunction freeze(object, oc) {\n\tif (oc === undefined) {\n\t\toc = Object\n\t}\n\treturn oc && typeof oc.freeze === 'function' ? oc.freeze(object) : object\n}\n\n/**\n * Since we can not rely on `Object.assign` we provide a simplified version\n * that is sufficient for our needs.\n *\n * @param {Object} target\n * @param {Object | null | undefined} source\n *\n * @returns {Object} target\n * @throws TypeError if target is not an object\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign\n * @see https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.assign\n */\nfunction assign(target, source) {\n\tif (target === null || typeof target !== 'object') {\n\t\tthrow new TypeError('target is not an object')\n\t}\n\tfor (var key in source) {\n\t\tif (Object.prototype.hasOwnProperty.call(source, key)) {\n\t\t\ttarget[key] = source[key]\n\t\t}\n\t}\n\treturn target\n}\n\n/**\n * All mime types that are allowed as input to `DOMParser.parseFromString`\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString#Argument02 MDN\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#domparsersupportedtype WHATWG HTML Spec\n * @see DOMParser.prototype.parseFromString\n */\nvar MIME_TYPE = freeze({\n\t/**\n\t * `text/html`, the only mime type that triggers treating an XML document as HTML.\n\t *\n\t * @see DOMParser.SupportedType.isHTML\n\t * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n\t * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring WHATWG HTML Spec\n\t */\n\tHTML: 'text/html',\n\n\t/**\n\t * Helper method to check a mime type if it indicates an HTML document\n\t *\n\t * @param {string} [value]\n\t * @returns {boolean}\n\t *\n\t * @see https://www.iana.org/assignments/media-types/text/html IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/HTML Wikipedia\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser/parseFromString MDN\n\t * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring \t */\n\tisHTML: function (value) {\n\t\treturn value === MIME_TYPE.HTML\n\t},\n\n\t/**\n\t * `application/xml`, the standard mime type for XML documents.\n\t *\n\t * @see https://www.iana.org/assignments/media-types/application/xml IANA MimeType registration\n\t * @see https://tools.ietf.org/html/rfc7303#section-9.1 RFC 7303\n\t * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n\t */\n\tXML_APPLICATION: 'application/xml',\n\n\t/**\n\t * `text/html`, an alias for `application/xml`.\n\t *\n\t * @see https://tools.ietf.org/html/rfc7303#section-9.2 RFC 7303\n\t * @see https://www.iana.org/assignments/media-types/text/xml IANA MimeType registration\n\t * @see https://en.wikipedia.org/wiki/XML_and_MIME Wikipedia\n\t */\n\tXML_TEXT: 'text/xml',\n\n\t/**\n\t * `application/xhtml+xml`, indicates an XML document that has the default HTML namespace,\n\t * but is parsed as an XML document.\n\t *\n\t * @see https://www.iana.org/assignments/media-types/application/xhtml+xml IANA MimeType registration\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument WHATWG DOM Spec\n\t * @see https://en.wikipedia.org/wiki/XHTML Wikipedia\n\t */\n\tXML_XHTML_APPLICATION: 'application/xhtml+xml',\n\n\t/**\n\t * `image/svg+xml`,\n\t *\n\t * @see https://www.iana.org/assignments/media-types/image/svg+xml IANA MimeType registration\n\t * @see https://www.w3.org/TR/SVG11/ W3C SVG 1.1\n\t * @see https://en.wikipedia.org/wiki/Scalable_Vector_Graphics Wikipedia\n\t */\n\tXML_SVG_IMAGE: 'image/svg+xml',\n})\n\n/**\n * Namespaces that are used in this code base.\n *\n * @see http://www.w3.org/TR/REC-xml-names\n */\nvar NAMESPACE = freeze({\n\t/**\n\t * The XHTML namespace.\n\t *\n\t * @see http://www.w3.org/1999/xhtml\n\t */\n\tHTML: 'http://www.w3.org/1999/xhtml',\n\n\t/**\n\t * Checks if `uri` equals `NAMESPACE.HTML`.\n\t *\n\t * @param {string} [uri]\n\t *\n\t * @see NAMESPACE.HTML\n\t */\n\tisHTML: function (uri) {\n\t\treturn uri === NAMESPACE.HTML\n\t},\n\n\t/**\n\t * The SVG namespace.\n\t *\n\t * @see http://www.w3.org/2000/svg\n\t */\n\tSVG: 'http://www.w3.org/2000/svg',\n\n\t/**\n\t * The `xml:` namespace.\n\t *\n\t * @see http://www.w3.org/XML/1998/namespace\n\t */\n\tXML: 'http://www.w3.org/XML/1998/namespace',\n\n\t/**\n\t * The `xmlns:` namespace\n\t *\n\t * @see https://www.w3.org/2000/xmlns/\n\t */\n\tXMLNS: 'http://www.w3.org/2000/xmlns/',\n})\n\nexports.assign = assign;\nexports.find = find;\nexports.freeze = freeze;\nexports.MIME_TYPE = MIME_TYPE;\nexports.NAMESPACE = NAMESPACE;\n","'use strict';\nvar charAt = require('../internals/string-multibyte').charAt;\n\n// `AdvanceStringIndex` abstract operation\n// https://tc39.es/ecma262/#sec-advancestringindex\nmodule.exports = function (S, index, unicode) {\n  return index + (unicode ? charAt(S, index).length : 1);\n};\n","var MPEGURL_REGEX = /^(audio|video|application)\\/(x-|vnd\\.apple\\.)?mpegurl/i;\nvar DASH_REGEX = /^application\\/dash\\+xml/i;\n/**\n * Returns a string that describes the type of source based on a video source object's\n * media type.\n *\n * @see {@link https://dev.w3.org/html5/pf-summary/video.html#dom-source-type|Source Type}\n *\n * @param {string} type\n *        Video source object media type\n * @return {('hls'|'dash'|'vhs-json'|null)}\n *         VHS source type string\n */\n\nexport var simpleTypeFromSourceType = function simpleTypeFromSourceType(type) {\n  if (MPEGURL_REGEX.test(type)) {\n    return 'hls';\n  }\n\n  if (DASH_REGEX.test(type)) {\n    return 'dash';\n  } // Denotes the special case of a manifest object passed to http-streaming instead of a\n  // source URL.\n  //\n  // See https://en.wikipedia.org/wiki/Media_type for details on specifying media types.\n  //\n  // In this case, vnd stands for vendor, video.js for the organization, VHS for this\n  // project, and the +json suffix identifies the structure of the media type.\n\n\n  if (type === 'application/vnd.videojs.vhs+json') {\n    return 'vhs-json';\n  }\n\n  return null;\n};","'use strict';\n\n// Helper\nfunction reverse(map) {\n  const res = {};\n\n  Object.keys(map).forEach(function(key) {\n    // Convert key to integer if it is stringified\n    if ((key | 0) == key)\n      key = key | 0;\n\n    const value = map[key];\n    res[value] = key;\n  });\n\n  return res;\n}\n\nexports.tagClass = {\n  0: 'universal',\n  1: 'application',\n  2: 'context',\n  3: 'private'\n};\nexports.tagClassByName = reverse(exports.tagClass);\n\nexports.tag = {\n  0x00: 'end',\n  0x01: 'bool',\n  0x02: 'int',\n  0x03: 'bitstr',\n  0x04: 'octstr',\n  0x05: 'null_',\n  0x06: 'objid',\n  0x07: 'objDesc',\n  0x08: 'external',\n  0x09: 'real',\n  0x0a: 'enum',\n  0x0b: 'embed',\n  0x0c: 'utf8str',\n  0x0d: 'relativeOid',\n  0x10: 'seq',\n  0x11: 'set',\n  0x12: 'numstr',\n  0x13: 'printstr',\n  0x14: 't61str',\n  0x15: 'videostr',\n  0x16: 'ia5str',\n  0x17: 'utctime',\n  0x18: 'gentime',\n  0x19: 'graphstr',\n  0x1a: 'iso646str',\n  0x1b: 'genstr',\n  0x1c: 'unistr',\n  0x1d: 'charstr',\n  0x1e: 'bmpstr'\n};\nexports.tagByName = reverse(exports.tag);\n","'use strict';\n\nvar utils = require('../utils');\n\nvar SHA512 = require('./512');\n\nfunction SHA384() {\n  if (!(this instanceof SHA384))\n    return new SHA384();\n\n  SHA512.call(this);\n  this.h = [\n    0xcbbb9d5d, 0xc1059ed8,\n    0x629a292a, 0x367cd507,\n    0x9159015a, 0x3070dd17,\n    0x152fecd8, 0xf70e5939,\n    0x67332667, 0xffc00b31,\n    0x8eb44a87, 0x68581511,\n    0xdb0c2e0d, 0x64f98fa7,\n    0x47b5481d, 0xbefa4fa4 ];\n}\nutils.inherits(SHA384, SHA512);\nmodule.exports = SHA384;\n\nSHA384.blockSize = 1024;\nSHA384.outSize = 384;\nSHA384.hmacStrength = 192;\nSHA384.padLength = 128;\n\nSHA384.prototype._digest = function digest(enc) {\n  if (enc === 'hex')\n    return utils.toHex32(this.h.slice(0, 12), 'big');\n  else\n    return utils.split32(this.h.slice(0, 12), 'big');\n};\n","var Buffer = require('safe-buffer').Buffer\n\nmodule.exports = function (thing, encoding, name) {\n  if (Buffer.isBuffer(thing)) {\n    return thing\n  } else if (typeof thing === 'string') {\n    return Buffer.from(thing, encoding)\n  } else if (ArrayBuffer.isView(thing)) {\n    return Buffer.from(thing.buffer)\n  } else {\n    throw new TypeError(name + ' must be a string, a Buffer, a typed array or a DataView')\n  }\n}\n","\"use strict\";\n\nvar window = require('global/window');\n\nvar httpResponseHandler = function httpResponseHandler(callback, decodeResponseBody) {\n  if (decodeResponseBody === void 0) {\n    decodeResponseBody = false;\n  }\n\n  return function (err, response, responseBody) {\n    // if the XHR failed, return that error\n    if (err) {\n      callback(err);\n      return;\n    } // if the HTTP status code is 4xx or 5xx, the request also failed\n\n\n    if (response.statusCode >= 400 && response.statusCode <= 599) {\n      var cause = responseBody;\n\n      if (decodeResponseBody) {\n        if (window.TextDecoder) {\n          var charset = getCharset(response.headers && response.headers['content-type']);\n\n          try {\n            cause = new TextDecoder(charset).decode(responseBody);\n          } catch (e) {}\n        } else {\n          cause = String.fromCharCode.apply(null, new Uint8Array(responseBody));\n        }\n      }\n\n      callback({\n        cause: cause\n      });\n      return;\n    } // otherwise, request succeeded\n\n\n    callback(null, responseBody);\n  };\n};\n\nfunction getCharset(contentTypeHeader) {\n  if (contentTypeHeader === void 0) {\n    contentTypeHeader = '';\n  }\n\n  return contentTypeHeader.toLowerCase().split(';').reduce(function (charset, contentType) {\n    var _contentType$split = contentType.split('='),\n        type = _contentType$split[0],\n        value = _contentType$split[1];\n\n    if (type.trim() === 'charset') {\n      return value.trim();\n    }\n\n    return charset;\n  }, 'utf-8');\n}\n\nmodule.exports = httpResponseHandler;","module.exports = SafeParseTuple\n\nfunction SafeParseTuple(obj, reviver) {\n    var json\n    var error = null\n\n    try {\n        json = JSON.parse(obj, reviver)\n    } catch (err) {\n        error = err\n    }\n\n    return [error, json]\n}\n","/**\n * @module playlist-loader\n *\n * @file A state machine that manages the loading, caching, and updating of\n * M3U8 playlists.\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _resolveUrl = require('./resolve-url');\n\nvar _resolveUrl2 = _interopRequireDefault(_resolveUrl);\n\nvar _videoJs = require('video.js');\n\nvar _m3u8Parser = require('m3u8-parser');\n\nvar _m3u8Parser2 = _interopRequireDefault(_m3u8Parser);\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\n/**\n * Returns a new array of segments that is the result of merging\n * properties from an older list of segments onto an updated\n * list. No properties on the updated playlist will be overridden.\n *\n * @param {Array} original the outdated list of segments\n * @param {Array} update the updated list of segments\n * @param {Number=} offset the index of the first update\n * segment in the original segment list. For non-live playlists,\n * this should always be zero and does not need to be\n * specified. For live playlists, it should be the difference\n * between the media sequence numbers in the original and updated\n * playlists.\n * @return a list of merged segment objects\n */\nvar updateSegments = function updateSegments(original, update, offset) {\n  var result = update.slice();\n\n  offset = offset || 0;\n  var length = Math.min(original.length, update.length + offset);\n\n  for (var i = offset; i < length; i++) {\n    result[i - offset] = (0, _videoJs.mergeOptions)(original[i], result[i - offset]);\n  }\n  return result;\n};\n\nexports.updateSegments = updateSegments;\nvar resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {\n  if (!segment.resolvedUri) {\n    segment.resolvedUri = (0, _resolveUrl2['default'])(baseUri, segment.uri);\n  }\n  if (segment.key && !segment.key.resolvedUri) {\n    segment.key.resolvedUri = (0, _resolveUrl2['default'])(baseUri, segment.key.uri);\n  }\n  if (segment.map && !segment.map.resolvedUri) {\n    segment.map.resolvedUri = (0, _resolveUrl2['default'])(baseUri, segment.map.uri);\n  }\n};\n\nexports.resolveSegmentUris = resolveSegmentUris;\n/**\n  * Returns a new master playlist that is the result of merging an\n  * updated media playlist into the original version. If the\n  * updated media playlist does not match any of the playlist\n  * entries in the original master playlist, null is returned.\n  *\n  * @param {Object} master a parsed master M3U8 object\n  * @param {Object} media a parsed media M3U8 object\n  * @return {Object} a new object that represents the original\n  * master playlist with the updated media playlist merged in, or\n  * null if the merge produced no change.\n  */\nvar updateMaster = function updateMaster(master, media) {\n  var result = (0, _videoJs.mergeOptions)(master, {});\n  var playlist = result.playlists.filter(function (p) {\n    return p.uri === media.uri;\n  })[0];\n\n  if (!playlist) {\n    return null;\n  }\n\n  // consider the playlist unchanged if the number of segments is equal and the media\n  // sequence number is unchanged\n  if (playlist.segments && media.segments && playlist.segments.length === media.segments.length && playlist.mediaSequence === media.mediaSequence) {\n    return null;\n  }\n\n  var mergedPlaylist = (0, _videoJs.mergeOptions)(playlist, media);\n\n  // if the update could overlap existing segment information, merge the two segment lists\n  if (playlist.segments) {\n    mergedPlaylist.segments = updateSegments(playlist.segments, media.segments, media.mediaSequence - playlist.mediaSequence);\n  }\n\n  // resolve any segment URIs to prevent us from having to do it later\n  mergedPlaylist.segments.forEach(function (segment) {\n    resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n  });\n\n  // TODO Right now in the playlists array there are two references to each playlist, one\n  // that is referenced by index, and one by URI. The index reference may no longer be\n  // necessary.\n  for (var i = 0; i < result.playlists.length; i++) {\n    if (result.playlists[i].uri === media.uri) {\n      result.playlists[i] = mergedPlaylist;\n    }\n  }\n  result.playlists[media.uri] = mergedPlaylist;\n\n  return result;\n};\n\nexports.updateMaster = updateMaster;\nvar setupMediaPlaylists = function setupMediaPlaylists(master) {\n  // setup by-URI lookups and resolve media playlist URIs\n  var i = master.playlists.length;\n\n  while (i--) {\n    var playlist = master.playlists[i];\n\n    master.playlists[playlist.uri] = playlist;\n    playlist.resolvedUri = (0, _resolveUrl2['default'])(master.uri, playlist.uri);\n\n    if (!playlist.attributes) {\n      // Although the spec states an #EXT-X-STREAM-INF tag MUST have a\n      // BANDWIDTH attribute, we can play the stream without it. This means a poorly\n      // formatted master playlist may not have an attribute list. An attributes\n      // property is added here to prevent undefined references when we encounter\n      // this scenario.\n      playlist.attributes = {};\n\n      _videoJs.log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n    }\n  }\n};\n\nexports.setupMediaPlaylists = setupMediaPlaylists;\nvar resolveMediaGroupUris = function resolveMediaGroupUris(master) {\n  ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n\n        if (mediaProperties.uri) {\n          mediaProperties.resolvedUri = (0, _resolveUrl2['default'])(master.uri, mediaProperties.uri);\n        }\n      }\n    }\n  });\n};\n\nexports.resolveMediaGroupUris = resolveMediaGroupUris;\n/**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n *        The current media\n * @param {Boolean} update\n *        True if there were any updates from the last refresh, false otherwise\n * @return {Number}\n *         The time in ms to wait before refreshing the live playlist\n */\nvar refreshDelay = function refreshDelay(media, update) {\n  var lastSegment = media.segments[media.segments.length - 1];\n  var delay = undefined;\n\n  if (update && lastSegment && lastSegment.duration) {\n    delay = lastSegment.duration * 1000;\n  } else {\n    // if the playlist is unchanged since the last reload or last segment duration\n    // cannot be determined, try again after half the target duration\n    delay = (media.targetDuration || 10) * 500;\n  }\n  return delay;\n};\n\nexports.refreshDelay = refreshDelay;\n/**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends videojs.EventTarget\n * @param {String} srcUrl the url to start with\n * @param {Object} hls\n * @param {Object} [options]\n * @param {Boolean} [options.withCredentials=false] the withCredentials xhr option\n * @param {Boolean} [options.handleManifestRedirects=false] whether to follow redirects, when any\n *        playlist request was redirected\n */\n\nvar PlaylistLoader = (function (_EventTarget) {\n  _inherits(PlaylistLoader, _EventTarget);\n\n  function PlaylistLoader(srcUrl, hls, options) {\n    var _this = this;\n\n    _classCallCheck(this, PlaylistLoader);\n\n    _get(Object.getPrototypeOf(PlaylistLoader.prototype), 'constructor', this).call(this);\n\n    options = options || {};\n\n    this.srcUrl = srcUrl;\n    this.hls_ = hls;\n    this.withCredentials = !!options.withCredentials;\n    this.handleManifestRedirects = !!options.handleManifestRedirects;\n\n    if (!this.srcUrl) {\n      throw new Error('A non-empty playlist URL is required');\n    }\n\n    // initialize the loader state\n    this.state = 'HAVE_NOTHING';\n\n    // live playlist staleness timeout\n    this.on('mediaupdatetimeout', function () {\n      if (_this.state !== 'HAVE_METADATA') {\n        // only refresh the media playlist if no other activity is going on\n        return;\n      }\n\n      _this.state = 'HAVE_CURRENT_METADATA';\n\n      _this.request = _this.hls_.xhr({\n        uri: (0, _resolveUrl2['default'])(_this.master.uri, _this.media().uri),\n        withCredentials: _this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this.request) {\n          return;\n        }\n\n        if (error) {\n          return _this.playlistRequestError(_this.request, _this.media().uri, 'HAVE_METADATA');\n        }\n\n        _this.haveMetadata(_this.request, _this.media().uri);\n      });\n    });\n  }\n\n  _createClass(PlaylistLoader, [{\n    key: 'playlistRequestError',\n    value: function playlistRequestError(xhr, url, startingState) {\n      // any in-flight request is now finished\n      this.request = null;\n\n      if (startingState) {\n        this.state = startingState;\n      }\n\n      this.error = {\n        playlist: this.master.playlists[url],\n        status: xhr.status,\n        message: 'HLS playlist request error at URL: ' + url,\n        responseText: xhr.responseText,\n        code: xhr.status >= 500 ? 4 : 2\n      };\n\n      this.trigger('error');\n    }\n\n    // update the playlist loader's state in response to a new or\n    // updated playlist.\n  }, {\n    key: 'haveMetadata',\n    value: function haveMetadata(xhr, url) {\n      var _this2 = this;\n\n      // any in-flight request is now finished\n      this.request = null;\n      this.state = 'HAVE_METADATA';\n\n      var parser = new _m3u8Parser2['default'].Parser();\n\n      parser.push(xhr.responseText);\n      parser.end();\n      parser.manifest.uri = url;\n      // m3u8-parser does not attach an attributes property to media playlists so make\n      // sure that the property is attached to avoid undefined reference errors\n      parser.manifest.attributes = parser.manifest.attributes || {};\n\n      // merge this playlist into the master\n      var update = updateMaster(this.master, parser.manifest);\n\n      this.targetDuration = parser.manifest.targetDuration;\n\n      if (update) {\n        this.master = update;\n        this.media_ = this.master.playlists[parser.manifest.uri];\n      } else {\n        this.trigger('playlistunchanged');\n      }\n\n      // refresh live playlists after a target duration passes\n      if (!this.media().endList) {\n        _globalWindow2['default'].clearTimeout(this.mediaUpdateTimeout);\n        this.mediaUpdateTimeout = _globalWindow2['default'].setTimeout(function () {\n          _this2.trigger('mediaupdatetimeout');\n        }, refreshDelay(this.media(), !!update));\n      }\n\n      this.trigger('loadedplaylist');\n    }\n\n    /**\n     * Abort any outstanding work and clean up.\n     */\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.stopRequest();\n      _globalWindow2['default'].clearTimeout(this.mediaUpdateTimeout);\n    }\n  }, {\n    key: 'stopRequest',\n    value: function stopRequest() {\n      if (this.request) {\n        var oldRequest = this.request;\n\n        this.request = null;\n        oldRequest.onreadystatechange = null;\n        oldRequest.abort();\n      }\n    }\n\n    /**\n     * When called without any arguments, returns the currently\n     * active media playlist. When called with a single argument,\n     * triggers the playlist loader to asynchronously switch to the\n     * specified media playlist. Calling this method while the\n     * loader is in the HAVE_NOTHING causes an error to be emitted\n     * but otherwise has no effect.\n     *\n     * @param {Object=} playlist the parsed media playlist\n     * object to switch to\n     * @return {Playlist} the current loaded media\n     */\n  }, {\n    key: 'media',\n    value: function media(playlist) {\n      var _this3 = this;\n\n      // getter\n      if (!playlist) {\n        return this.media_;\n      }\n\n      // setter\n      if (this.state === 'HAVE_NOTHING') {\n        throw new Error('Cannot switch media playlist from ' + this.state);\n      }\n\n      var startingState = this.state;\n\n      // find the playlist object if the target playlist has been\n      // specified by URI\n      if (typeof playlist === 'string') {\n        if (!this.master.playlists[playlist]) {\n          throw new Error('Unknown playlist URI: ' + playlist);\n        }\n        playlist = this.master.playlists[playlist];\n      }\n\n      var mediaChange = !this.media_ || playlist.uri !== this.media_.uri;\n\n      // switch to fully loaded playlists immediately\n      if (this.master.playlists[playlist.uri].endList) {\n        // abort outstanding playlist requests\n        if (this.request) {\n          this.request.onreadystatechange = null;\n          this.request.abort();\n          this.request = null;\n        }\n        this.state = 'HAVE_METADATA';\n        this.media_ = playlist;\n\n        // trigger media change if the active media has been updated\n        if (mediaChange) {\n          this.trigger('mediachanging');\n          this.trigger('mediachange');\n        }\n        return;\n      }\n\n      // switching to the active playlist is a no-op\n      if (!mediaChange) {\n        return;\n      }\n\n      this.state = 'SWITCHING_MEDIA';\n\n      // there is already an outstanding playlist request\n      if (this.request) {\n        if (playlist.resolvedUri === this.request.url) {\n          // requesting to switch to the same playlist multiple times\n          // has no effect after the first\n          return;\n        }\n        this.request.onreadystatechange = null;\n        this.request.abort();\n        this.request = null;\n      }\n\n      // request the new playlist\n      if (this.media_) {\n        this.trigger('mediachanging');\n      }\n\n      this.request = this.hls_.xhr({\n        uri: playlist.resolvedUri,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this3.request) {\n          return;\n        }\n\n        playlist.resolvedUri = _this3.resolveManifestRedirect(playlist.resolvedUri, req);\n\n        if (error) {\n          return _this3.playlistRequestError(_this3.request, playlist.uri, startingState);\n        }\n\n        _this3.haveMetadata(req, playlist.uri);\n\n        // fire loadedmetadata the first time a media playlist is loaded\n        if (startingState === 'HAVE_MASTER') {\n          _this3.trigger('loadedmetadata');\n        } else {\n          _this3.trigger('mediachange');\n        }\n      });\n    }\n\n    /**\n     * Checks whether xhr request was redirected and returns correct url depending\n     * on `handleManifestRedirects` option\n     *\n     * @api private\n     *\n     * @param  {String} url - an url being requested\n     * @param  {XMLHttpRequest} req - xhr request result\n     *\n     * @return {String}\n     */\n  }, {\n    key: 'resolveManifestRedirect',\n    value: function resolveManifestRedirect(url, req) {\n      if (this.handleManifestRedirects && req.responseURL && url !== req.responseURL) {\n        return req.responseURL;\n      }\n\n      return url;\n    }\n\n    /**\n     * pause loading of the playlist\n     */\n  }, {\n    key: 'pause',\n    value: function pause() {\n      this.stopRequest();\n      _globalWindow2['default'].clearTimeout(this.mediaUpdateTimeout);\n      if (this.state === 'HAVE_NOTHING') {\n        // If we pause the loader before any data has been retrieved, its as if we never\n        // started, so reset to an unstarted state.\n        this.started = false;\n      }\n      // Need to restore state now that no activity is happening\n      if (this.state === 'SWITCHING_MEDIA') {\n        // if the loader was in the process of switching media, it should either return to\n        // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media\n        // playlist yet. This is determined by the existence of loader.media_\n        if (this.media_) {\n          this.state = 'HAVE_METADATA';\n        } else {\n          this.state = 'HAVE_MASTER';\n        }\n      } else if (this.state === 'HAVE_CURRENT_METADATA') {\n        this.state = 'HAVE_METADATA';\n      }\n    }\n\n    /**\n     * start loading of the playlist\n     */\n  }, {\n    key: 'load',\n    value: function load(isFinalRendition) {\n      var _this4 = this;\n\n      _globalWindow2['default'].clearTimeout(this.mediaUpdateTimeout);\n\n      var media = this.media();\n\n      if (isFinalRendition) {\n        var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n\n        this.mediaUpdateTimeout = _globalWindow2['default'].setTimeout(function () {\n          return _this4.load();\n        }, delay);\n        return;\n      }\n\n      if (!this.started) {\n        this.start();\n        return;\n      }\n\n      if (media && !media.endList) {\n        this.trigger('mediaupdatetimeout');\n      } else {\n        this.trigger('loadedplaylist');\n      }\n    }\n\n    /**\n     * start loading of the playlist\n     */\n  }, {\n    key: 'start',\n    value: function start() {\n      var _this5 = this;\n\n      this.started = true;\n\n      // request the specified URL\n      this.request = this.hls_.xhr({\n        uri: this.srcUrl,\n        withCredentials: this.withCredentials\n      }, function (error, req) {\n        // disposed\n        if (!_this5.request) {\n          return;\n        }\n\n        // clear the loader's request reference\n        _this5.request = null;\n\n        if (error) {\n          _this5.error = {\n            status: req.status,\n            message: 'HLS playlist request error at URL: ' + _this5.srcUrl,\n            responseText: req.responseText,\n            // MEDIA_ERR_NETWORK\n            code: 2\n          };\n          if (_this5.state === 'HAVE_NOTHING') {\n            _this5.started = false;\n          }\n          return _this5.trigger('error');\n        }\n\n        var parser = new _m3u8Parser2['default'].Parser();\n\n        parser.push(req.responseText);\n        parser.end();\n\n        _this5.state = 'HAVE_MASTER';\n\n        _this5.srcUrl = _this5.resolveManifestRedirect(_this5.srcUrl, req);\n\n        parser.manifest.uri = _this5.srcUrl;\n\n        // loaded a master playlist\n        if (parser.manifest.playlists) {\n          _this5.master = parser.manifest;\n\n          setupMediaPlaylists(_this5.master);\n          resolveMediaGroupUris(_this5.master);\n\n          _this5.trigger('loadedplaylist');\n          if (!_this5.request) {\n            // no media playlist was specifically selected so start\n            // from the first listed one\n            _this5.media(parser.manifest.playlists[0]);\n          }\n          return;\n        }\n\n        // loaded a media playlist\n        // infer a master playlist if none was previously requested\n        _this5.master = {\n          mediaGroups: {\n            'AUDIO': {},\n            'VIDEO': {},\n            'CLOSED-CAPTIONS': {},\n            'SUBTITLES': {}\n          },\n          uri: _globalWindow2['default'].location.href,\n          playlists: [{\n            uri: _this5.srcUrl,\n            resolvedUri: _this5.srcUrl,\n            // m3u8-parser does not attach an attributes property to media playlists so make\n            // sure that the property is attached to avoid undefined reference errors\n            attributes: {}\n          }]\n        };\n        _this5.master.playlists[_this5.srcUrl] = _this5.master.playlists[0];\n        _this5.haveMetadata(req, _this5.srcUrl);\n        return _this5.trigger('loadedmetadata');\n      });\n    }\n  }]);\n\n  return PlaylistLoader;\n})(_videoJs.EventTarget);\n\nexports['default'] = PlaylistLoader;","module.exports = function xor (a, b) {\n  var length = Math.min(a.length, b.length)\n  var buffer = new Buffer(length)\n\n  for (var i = 0; i < length; ++i) {\n    buffer[i] = a[i] ^ b[i]\n  }\n\n  return buffer\n}\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * ISO/IEC 9797-1 Padding Method 2.\n\t */\n\tCryptoJS.pad.Iso97971 = {\n\t    pad: function (data, blockSize) {\n\t        // Add 0x80 byte\n\t        data.concat(CryptoJS.lib.WordArray.create([0x80000000], 1));\n\n\t        // Zero pad the rest\n\t        CryptoJS.pad.ZeroPadding.pad(data, blockSize);\n\t    },\n\n\t    unpad: function (data) {\n\t        // Remove zero padding\n\t        CryptoJS.pad.ZeroPadding.unpad(data);\n\n\t        // Remove one more byte -- the 0x80 byte\n\t        data.sigBytes--;\n\t    }\n\t};\n\n\n\treturn CryptoJS.pad.Iso97971;\n\n}));","'use strict';\n\nconst inherits = require('inherits');\nconst Buffer = require('safer-buffer').Buffer;\n\nconst DERDecoder = require('./der');\n\nfunction PEMDecoder(entity) {\n  DERDecoder.call(this, entity);\n  this.enc = 'pem';\n}\ninherits(PEMDecoder, DERDecoder);\nmodule.exports = PEMDecoder;\n\nPEMDecoder.prototype.decode = function decode(data, options) {\n  const lines = data.toString().split(/[\\r\\n]+/g);\n\n  const label = options.label.toUpperCase();\n\n  const re = /^-----(BEGIN|END) ([^-]+)-----$/;\n  let start = -1;\n  let end = -1;\n  for (let i = 0; i < lines.length; i++) {\n    const match = lines[i].match(re);\n    if (match === null)\n      continue;\n\n    if (match[2] !== label)\n      continue;\n\n    if (start === -1) {\n      if (match[1] !== 'BEGIN')\n        break;\n      start = i;\n    } else {\n      if (match[1] !== 'END')\n        break;\n      end = i;\n      break;\n    }\n  }\n  if (start === -1 || end === -1)\n    throw new Error('PEM section not found for: ' + label);\n\n  const base64 = lines.slice(start + 1, end).join('');\n  // Remove excessive symbols\n  base64.replace(/[^a-z0-9+/=]+/gi, '');\n\n  const input = Buffer.from(base64, 'base64');\n  return DERDecoder.prototype.decode.call(this, input, options);\n};\n","'use strict'; // undocumented cb() API, needed for core, not for public API\n\nfunction destroy(err, cb) {\n  var _this = this;\n\n  var readableDestroyed = this._readableState && this._readableState.destroyed;\n  var writableDestroyed = this._writableState && this._writableState.destroyed;\n\n  if (readableDestroyed || writableDestroyed) {\n    if (cb) {\n      cb(err);\n    } else if (err) {\n      if (!this._writableState) {\n        process.nextTick(emitErrorNT, this, err);\n      } else if (!this._writableState.errorEmitted) {\n        this._writableState.errorEmitted = true;\n        process.nextTick(emitErrorNT, this, err);\n      }\n    }\n\n    return this;\n  } // we set destroyed to true before firing error callbacks in order\n  // to make it re-entrance safe in case destroy() is called within callbacks\n\n\n  if (this._readableState) {\n    this._readableState.destroyed = true;\n  } // if this is a duplex stream mark the writable part as destroyed as well\n\n\n  if (this._writableState) {\n    this._writableState.destroyed = true;\n  }\n\n  this._destroy(err || null, function (err) {\n    if (!cb && err) {\n      if (!_this._writableState) {\n        process.nextTick(emitErrorAndCloseNT, _this, err);\n      } else if (!_this._writableState.errorEmitted) {\n        _this._writableState.errorEmitted = true;\n        process.nextTick(emitErrorAndCloseNT, _this, err);\n      } else {\n        process.nextTick(emitCloseNT, _this);\n      }\n    } else if (cb) {\n      process.nextTick(emitCloseNT, _this);\n      cb(err);\n    } else {\n      process.nextTick(emitCloseNT, _this);\n    }\n  });\n\n  return this;\n}\n\nfunction emitErrorAndCloseNT(self, err) {\n  emitErrorNT(self, err);\n  emitCloseNT(self);\n}\n\nfunction emitCloseNT(self) {\n  if (self._writableState && !self._writableState.emitClose) return;\n  if (self._readableState && !self._readableState.emitClose) return;\n  self.emit('close');\n}\n\nfunction undestroy() {\n  if (this._readableState) {\n    this._readableState.destroyed = false;\n    this._readableState.reading = false;\n    this._readableState.ended = false;\n    this._readableState.endEmitted = false;\n  }\n\n  if (this._writableState) {\n    this._writableState.destroyed = false;\n    this._writableState.ended = false;\n    this._writableState.ending = false;\n    this._writableState.finalCalled = false;\n    this._writableState.prefinished = false;\n    this._writableState.finished = false;\n    this._writableState.errorEmitted = false;\n  }\n}\n\nfunction emitErrorNT(self, err) {\n  self.emit('error', err);\n}\n\nfunction errorOrDestroy(stream, err) {\n  // We have tests that rely on errors being emitted\n  // in the same tick, so changing this is semver major.\n  // For now when you opt-in to autoDestroy we allow\n  // the error to be emitted nextTick. In a future\n  // semver major update we should change the default to this.\n  var rState = stream._readableState;\n  var wState = stream._writableState;\n  if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);\n}\n\nmodule.exports = {\n  destroy: destroy,\n  undestroy: undestroy,\n  errorOrDestroy: errorOrDestroy\n};","var id = 0;\nvar postfix = Math.random();\n\nmodule.exports = function (key) {\n  return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar definePropertyModule = require('../internals/object-define-property');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\n\nmodule.exports = DESCRIPTORS ? function (object, key, value) {\n  return definePropertyModule.f(object, key, createPropertyDescriptor(1, value));\n} : function (object, key, value) {\n  object[key] = value;\n  return object;\n};\n","/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */\nexports.read = function (buffer, offset, isLE, mLen, nBytes) {\n  var e, m\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var nBits = -7\n  var i = isLE ? (nBytes - 1) : 0\n  var d = isLE ? -1 : 1\n  var s = buffer[offset + i]\n\n  i += d\n\n  e = s & ((1 << (-nBits)) - 1)\n  s >>= (-nBits)\n  nBits += eLen\n  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  m = e & ((1 << (-nBits)) - 1)\n  e >>= (-nBits)\n  nBits += mLen\n  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n  if (e === 0) {\n    e = 1 - eBias\n  } else if (e === eMax) {\n    return m ? NaN : ((s ? -1 : 1) * Infinity)\n  } else {\n    m = m + Math.pow(2, mLen)\n    e = e - eBias\n  }\n  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n  var e, m, c\n  var eLen = (nBytes * 8) - mLen - 1\n  var eMax = (1 << eLen) - 1\n  var eBias = eMax >> 1\n  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n  var i = isLE ? 0 : (nBytes - 1)\n  var d = isLE ? 1 : -1\n  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n  value = Math.abs(value)\n\n  if (isNaN(value) || value === Infinity) {\n    m = isNaN(value) ? 1 : 0\n    e = eMax\n  } else {\n    e = Math.floor(Math.log(value) / Math.LN2)\n    if (value * (c = Math.pow(2, -e)) < 1) {\n      e--\n      c *= 2\n    }\n    if (e + eBias >= 1) {\n      value += rt / c\n    } else {\n      value += rt * Math.pow(2, 1 - eBias)\n    }\n    if (value * c >= 2) {\n      e++\n      c /= 2\n    }\n\n    if (e + eBias >= eMax) {\n      m = 0\n      e = eMax\n    } else if (e + eBias >= 1) {\n      m = ((value * c) - 1) * Math.pow(2, mLen)\n      e = e + eBias\n    } else {\n      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n      e = 0\n    }\n  }\n\n  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n  e = (e << mLen) | m\n  eLen += mLen\n  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n  buffer[offset + i - d] |= s * 128\n}\n","module.exports = function () {\n  throw new Error('Readable.from is not available in the browser')\n};\n","/**\n * @file master-playlist-controller.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _playlistLoader = require('./playlist-loader');\n\nvar _playlistLoader2 = _interopRequireDefault(_playlistLoader);\n\nvar _playlistJs = require('./playlist.js');\n\nvar _segmentLoader = require('./segment-loader');\n\nvar _segmentLoader2 = _interopRequireDefault(_segmentLoader);\n\nvar _vttSegmentLoader = require('./vtt-segment-loader');\n\nvar _vttSegmentLoader2 = _interopRequireDefault(_vttSegmentLoader);\n\nvar _ranges = require('./ranges');\n\nvar _ranges2 = _interopRequireDefault(_ranges);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _adCueTags = require('./ad-cue-tags');\n\nvar _adCueTags2 = _interopRequireDefault(_adCueTags);\n\nvar _syncController = require('./sync-controller');\n\nvar _syncController2 = _interopRequireDefault(_syncController);\n\nvar _videojsContribMediaSourcesEs5CodecUtils = require('videojs-contrib-media-sources/es5/codec-utils');\n\nvar _webwackify = require('webwackify');\n\nvar _webwackify2 = _interopRequireDefault(_webwackify);\n\nvar _decrypterWorker = require('./decrypter-worker');\n\nvar _decrypterWorker2 = _interopRequireDefault(_decrypterWorker);\n\nvar _config = require('./config');\n\nvar _config2 = _interopRequireDefault(_config);\n\nvar _utilCodecsJs = require('./util/codecs.js');\n\nvar _mediaGroups = require('./media-groups');\n\nvar ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;\n\nvar Hls = undefined;\n\n// Default codec parameters if none were provided for video and/or audio\nvar defaultCodecs = {\n  videoCodec: 'avc1',\n  videoObjectTypeIndicator: '.4d400d',\n  // AAC-LC\n  audioProfile: '2'\n};\n\n// SegmentLoader stats that need to have each loader's\n// values summed to calculate the final value\nvar loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred'];\nvar sumLoaderStat = function sumLoaderStat(stat) {\n  return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n};\n\nvar resolveDecrypterWorker = function resolveDecrypterWorker() {\n  var result = undefined;\n\n  try {\n    result = require.resolve('./decrypter-worker');\n  } catch (e) {\n    // no result\n  }\n\n  return result;\n};\n\n/**\n * Replace codecs in the codec string with the old apple-style `avc1.<dd>.<dd>` to the\n * standard `avc1.<hhhhhh>`.\n *\n * @param codecString {String} the codec string\n * @return {String} the codec string with old apple-style codecs replaced\n *\n * @private\n */\nvar mapLegacyAvcCodecs_ = function mapLegacyAvcCodecs_(codecString) {\n  return codecString.replace(/avc1\\.(\\d+)\\.(\\d+)/i, function (match) {\n    return (0, _videojsContribMediaSourcesEs5CodecUtils.translateLegacyCodecs)([match])[0];\n  });\n};\n\nexports.mapLegacyAvcCodecs_ = mapLegacyAvcCodecs_;\n/**\n * Build a media mime-type string from a set of parameters\n * @param {String} type either 'audio' or 'video'\n * @param {String} container either 'mp2t' or 'mp4'\n * @param {Array} codecs an array of codec strings to add\n * @return {String} a valid media mime-type\n */\nvar makeMimeTypeString = function makeMimeTypeString(type, container, codecs) {\n  // The codecs array is filtered so that falsey values are\n  // dropped and don't cause Array#join to create spurious\n  // commas\n  return type + '/' + container + '; codecs=\"' + codecs.filter(function (c) {\n    return !!c;\n  }).join(', ') + '\"';\n};\n\n/**\n * Returns the type container based on information in the playlist\n * @param {Playlist} media the current media playlist\n * @return {String} a valid media container type\n */\nvar getContainerType = function getContainerType(media) {\n  // An initialization segment means the media playlist is an iframe\n  // playlist or is using the mp4 container. We don't currently\n  // support iframe playlists, so assume this is signalling mp4\n  // fragments.\n  if (media.segments && media.segments.length && media.segments[0].map) {\n    return 'mp4';\n  }\n  return 'mp2t';\n};\n\n/**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\nvar getCodecs = function getCodecs(media) {\n  // if the codecs were explicitly specified, use them instead of the\n  // defaults\n  var mediaAttributes = media.attributes || {};\n\n  if (mediaAttributes.CODECS) {\n    return (0, _utilCodecsJs.parseCodecs)(mediaAttributes.CODECS);\n  }\n  return defaultCodecs;\n};\n\n/**\n * Calculates the MIME type strings for a working configuration of\n * SourceBuffers to play variant streams in a master playlist. If\n * there is no possible working configuration, an empty array will be\n * returned.\n *\n * @param master {Object} the m3u8 object for the master playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Array} the MIME type strings. If the array has more than\n * one entry, the first element should be applied to the video\n * SourceBuffer and the second to the audio SourceBuffer.\n *\n * @private\n */\nvar mimeTypesForPlaylist_ = function mimeTypesForPlaylist_(master, media) {\n  var containerType = getContainerType(media);\n  var codecInfo = getCodecs(media);\n  var mediaAttributes = media.attributes || {};\n  // Default condition for a traditional HLS (no demuxed audio/video)\n  var isMuxed = true;\n  var isMaat = false;\n\n  if (!media) {\n    // Not enough information\n    return [];\n  }\n\n  if (master.mediaGroups.AUDIO && mediaAttributes.AUDIO) {\n    var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n\n    // Handle the case where we are in a multiple-audio track scenario\n    if (audioGroup) {\n      isMaat = true;\n      // Start with the everything demuxed then...\n      isMuxed = false;\n      // ...check to see if any audio group tracks are muxed (ie. lacking a uri)\n      for (var groupId in audioGroup) {\n        if (!audioGroup[groupId].uri) {\n          isMuxed = true;\n          break;\n        }\n      }\n    }\n  }\n\n  // HLS with multiple-audio tracks must always get an audio codec.\n  // Put another way, there is no way to have a video-only multiple-audio HLS!\n  if (isMaat && !codecInfo.audioProfile) {\n    _videoJs2['default'].log.warn('Multiple audio tracks present but no audio codec string is specified. ' + 'Attempting to use the default audio codec (mp4a.40.2)');\n    codecInfo.audioProfile = defaultCodecs.audioProfile;\n  }\n\n  // Generate the final codec strings from the codec object generated above\n  var codecStrings = {};\n\n  if (codecInfo.videoCodec) {\n    codecStrings.video = '' + codecInfo.videoCodec + codecInfo.videoObjectTypeIndicator;\n  }\n\n  if (codecInfo.audioProfile) {\n    codecStrings.audio = 'mp4a.40.' + codecInfo.audioProfile;\n  }\n\n  // Finally, make and return an array with proper mime-types depending on\n  // the configuration\n  var justAudio = makeMimeTypeString('audio', containerType, [codecStrings.audio]);\n  var justVideo = makeMimeTypeString('video', containerType, [codecStrings.video]);\n  var bothVideoAudio = makeMimeTypeString('video', containerType, [codecStrings.video, codecStrings.audio]);\n\n  if (isMaat) {\n    if (!isMuxed && codecStrings.video) {\n      return [justVideo, justAudio];\n    }\n    // There exists the possiblity that this will return a `video/container`\n    // mime-type for the first entry in the array even when there is only audio.\n    // This doesn't appear to be a problem and simplifies the code.\n    return [bothVideoAudio, justAudio];\n  }\n\n  // If there is ano video codec at all, always just return a single\n  // audio/<container> mime-type\n  if (!codecStrings.video) {\n    return [justAudio];\n  }\n\n  // When not using separate audio media groups, audio and video is\n  // *always* muxed\n  return [bothVideoAudio];\n};\n\nexports.mimeTypesForPlaylist_ = mimeTypesForPlaylist_;\n/**\n * the master playlist controller controls all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a master playlist and a series of audio playlists\n * if they are available\n *\n * @class MasterPlaylistController\n * @extends videojs.EventTarget\n */\n\nvar MasterPlaylistController = (function (_videojs$EventTarget) {\n  _inherits(MasterPlaylistController, _videojs$EventTarget);\n\n  function MasterPlaylistController(options) {\n    var _this = this;\n\n    _classCallCheck(this, MasterPlaylistController);\n\n    _get(Object.getPrototypeOf(MasterPlaylistController.prototype), 'constructor', this).call(this);\n\n    var url = options.url;\n    var handleManifestRedirects = options.handleManifestRedirects;\n    var withCredentials = options.withCredentials;\n    var mode = options.mode;\n    var tech = options.tech;\n    var bandwidth = options.bandwidth;\n    var externHls = options.externHls;\n    var useCueTags = options.useCueTags;\n    var blacklistDuration = options.blacklistDuration;\n    var enableLowInitialPlaylist = options.enableLowInitialPlaylist;\n\n    if (!url) {\n      throw new Error('A non-empty playlist URL is required');\n    }\n\n    Hls = externHls;\n\n    this.tech_ = tech;\n    this.hls_ = tech.hls;\n    this.mode_ = mode;\n    this.useCueTags_ = useCueTags;\n    this.blacklistDuration = blacklistDuration;\n    this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n\n    if (this.useCueTags_) {\n      this.cueTagsTrack_ = this.tech_.addTextTrack('metadata', 'ad-cues');\n      this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n    }\n\n    this.requestOptions_ = {\n      withCredentials: withCredentials,\n      handleManifestRedirects: handleManifestRedirects,\n      timeout: null\n    };\n\n    this.mediaTypes_ = (0, _mediaGroups.createMediaTypes)();\n\n    this.mediaSource = new _videoJs2['default'].MediaSource({ mode: mode });\n\n    // load the media source into the player\n    this.mediaSource.addEventListener('sourceopen', this.handleSourceOpen_.bind(this));\n\n    this.seekable_ = _videoJs2['default'].createTimeRanges();\n    this.hasPlayed_ = function () {\n      return false;\n    };\n\n    this.syncController_ = new _syncController2['default'](options);\n    this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'segment-metadata'\n    }, false).track;\n\n    this.decrypter_ = (0, _webwackify2['default'])(_decrypterWorker2['default'], resolveDecrypterWorker());\n\n    var segmentLoaderSettings = {\n      hls: this.hls_,\n      mediaSource: this.mediaSource,\n      currentTime: this.tech_.currentTime.bind(this.tech_),\n      seekable: function seekable() {\n        return _this.seekable();\n      },\n      seeking: function seeking() {\n        return _this.tech_.seeking();\n      },\n      duration: function duration() {\n        return _this.mediaSource.duration;\n      },\n      hasPlayed: function hasPlayed() {\n        return _this.hasPlayed_();\n      },\n      goalBufferLength: function goalBufferLength() {\n        return _this.goalBufferLength();\n      },\n      bandwidth: bandwidth,\n      syncController: this.syncController_,\n      decrypter: this.decrypter_\n    };\n\n    // setup playlist loaders\n    this.masterPlaylistLoader_ = new _playlistLoader2['default'](url, this.hls_, this.requestOptions_);\n    this.setupMasterPlaylistLoaderListeners_();\n\n    // setup segment loaders\n    // combined audio/video or just video when alternate audio track is selected\n    this.mainSegmentLoader_ = new _segmentLoader2['default'](_videoJs2['default'].mergeOptions(segmentLoaderSettings, {\n      segmentMetadataTrack: this.segmentMetadataTrack_,\n      loaderType: 'main'\n    }), options);\n\n    // alternate audio track\n    this.audioSegmentLoader_ = new _segmentLoader2['default'](_videoJs2['default'].mergeOptions(segmentLoaderSettings, {\n      loaderType: 'audio'\n    }), options);\n\n    this.subtitleSegmentLoader_ = new _vttSegmentLoader2['default'](_videoJs2['default'].mergeOptions(segmentLoaderSettings, {\n      loaderType: 'vtt'\n    }), options);\n\n    this.setupSegmentLoaderListeners_();\n\n    // Create SegmentLoader stat-getters\n    loaderStats.forEach(function (stat) {\n      _this[stat + '_'] = sumLoaderStat.bind(_this, stat);\n    });\n\n    this.masterPlaylistLoader_.load();\n  }\n\n  /**\n   * Register event handlers on the master playlist loader. A helper\n   * function for construction time.\n   *\n   * @private\n   */\n\n  _createClass(MasterPlaylistController, [{\n    key: 'setupMasterPlaylistLoaderListeners_',\n    value: function setupMasterPlaylistLoaderListeners_() {\n      var _this2 = this;\n\n      this.masterPlaylistLoader_.on('loadedmetadata', function () {\n        var media = _this2.masterPlaylistLoader_.media();\n        var requestTimeout = _this2.masterPlaylistLoader_.targetDuration * 1.5 * 1000;\n\n        // If we don't have any more available playlists, we don't want to\n        // timeout the request.\n        if ((0, _playlistJs.isLowestEnabledRendition)(_this2.masterPlaylistLoader_.master, _this2.masterPlaylistLoader_.media())) {\n          _this2.requestOptions_.timeout = 0;\n        } else {\n          _this2.requestOptions_.timeout = requestTimeout;\n        }\n\n        // if this isn't a live video and preload permits, start\n        // downloading segments\n        if (media.endList && _this2.tech_.preload() !== 'none') {\n          _this2.mainSegmentLoader_.playlist(media, _this2.requestOptions_);\n          _this2.mainSegmentLoader_.load();\n        }\n\n        (0, _mediaGroups.setupMediaGroups)({\n          segmentLoaders: {\n            AUDIO: _this2.audioSegmentLoader_,\n            SUBTITLES: _this2.subtitleSegmentLoader_,\n            main: _this2.mainSegmentLoader_\n          },\n          tech: _this2.tech_,\n          requestOptions: _this2.requestOptions_,\n          masterPlaylistLoader: _this2.masterPlaylistLoader_,\n          mode: _this2.mode_,\n          hls: _this2.hls_,\n          master: _this2.master(),\n          mediaTypes: _this2.mediaTypes_,\n          blacklistCurrentPlaylist: _this2.blacklistCurrentPlaylist.bind(_this2)\n        });\n\n        _this2.triggerPresenceUsage_(_this2.master(), media);\n\n        try {\n          _this2.setupSourceBuffers_();\n        } catch (e) {\n          _videoJs2['default'].log.warn('Failed to create SourceBuffers', e);\n          return _this2.mediaSource.endOfStream('decode');\n        }\n        _this2.setupFirstPlay();\n\n        _this2.trigger('selectedinitialmedia');\n      });\n\n      this.masterPlaylistLoader_.on('loadedplaylist', function () {\n        var updatedPlaylist = _this2.masterPlaylistLoader_.media();\n\n        if (!updatedPlaylist) {\n          var selectedMedia = undefined;\n\n          if (_this2.enableLowInitialPlaylist) {\n            selectedMedia = _this2.selectInitialPlaylist();\n          }\n\n          if (!selectedMedia) {\n            selectedMedia = _this2.selectPlaylist();\n          }\n\n          _this2.initialMedia_ = selectedMedia;\n          _this2.masterPlaylistLoader_.media(_this2.initialMedia_);\n          return;\n        }\n\n        if (_this2.useCueTags_) {\n          _this2.updateAdCues_(updatedPlaylist);\n        }\n\n        // TODO: Create a new event on the PlaylistLoader that signals\n        // that the segments have changed in some way and use that to\n        // update the SegmentLoader instead of doing it twice here and\n        // on `mediachange`\n        _this2.mainSegmentLoader_.playlist(updatedPlaylist, _this2.requestOptions_);\n        _this2.updateDuration();\n\n        // If the player isn't paused, ensure that the segment loader is running,\n        // as it is possible that it was temporarily stopped while waiting for\n        // a playlist (e.g., in case the playlist errored and we re-requested it).\n        if (!_this2.tech_.paused()) {\n          _this2.mainSegmentLoader_.load();\n        }\n\n        if (!updatedPlaylist.endList) {\n          (function () {\n            var addSeekableRange = function addSeekableRange() {\n              var seekable = _this2.seekable();\n\n              if (seekable.length !== 0) {\n                _this2.mediaSource.addSeekableRange_(seekable.start(0), seekable.end(0));\n              }\n            };\n\n            if (_this2.duration() !== Infinity) {\n              (function () {\n                var onDurationchange = function onDurationchange() {\n                  if (_this2.duration() === Infinity) {\n                    addSeekableRange();\n                  } else {\n                    _this2.tech_.one('durationchange', onDurationchange);\n                  }\n                };\n\n                _this2.tech_.one('durationchange', onDurationchange);\n              })();\n            } else {\n              addSeekableRange();\n            }\n          })();\n        }\n      });\n\n      this.masterPlaylistLoader_.on('error', function () {\n        _this2.blacklistCurrentPlaylist(_this2.masterPlaylistLoader_.error);\n      });\n\n      this.masterPlaylistLoader_.on('mediachanging', function () {\n        _this2.mainSegmentLoader_.abort();\n        _this2.mainSegmentLoader_.pause();\n      });\n\n      this.masterPlaylistLoader_.on('mediachange', function () {\n        var media = _this2.masterPlaylistLoader_.media();\n        var requestTimeout = _this2.masterPlaylistLoader_.targetDuration * 1.5 * 1000;\n\n        // If we don't have any more available playlists, we don't want to\n        // timeout the request.\n        if ((0, _playlistJs.isLowestEnabledRendition)(_this2.masterPlaylistLoader_.master, _this2.masterPlaylistLoader_.media())) {\n          _this2.requestOptions_.timeout = 0;\n        } else {\n          _this2.requestOptions_.timeout = requestTimeout;\n        }\n\n        // TODO: Create a new event on the PlaylistLoader that signals\n        // that the segments have changed in some way and use that to\n        // update the SegmentLoader instead of doing it twice here and\n        // on `loadedplaylist`\n        _this2.mainSegmentLoader_.playlist(media, _this2.requestOptions_);\n        _this2.mainSegmentLoader_.load();\n\n        _this2.tech_.trigger({\n          type: 'mediachange',\n          bubbles: true\n        });\n      });\n\n      this.masterPlaylistLoader_.on('playlistunchanged', function () {\n        var updatedPlaylist = _this2.masterPlaylistLoader_.media();\n        var playlistOutdated = _this2.stuckAtPlaylistEnd_(updatedPlaylist);\n\n        if (playlistOutdated) {\n          // Playlist has stopped updating and we're stuck at its end. Try to\n          // blacklist it and switch to another playlist in the hope that that\n          // one is updating (and give the player a chance to re-adjust to the\n          // safe live point).\n          _this2.blacklistCurrentPlaylist({\n            message: 'Playlist no longer updating.'\n          });\n          // useful for monitoring QoS\n          _this2.tech_.trigger('playliststuck');\n        }\n      });\n\n      this.masterPlaylistLoader_.on('renditiondisabled', function () {\n        _this2.tech_.trigger({ type: 'usage', name: 'hls-rendition-disabled' });\n      });\n      this.masterPlaylistLoader_.on('renditionenabled', function () {\n        _this2.tech_.trigger({ type: 'usage', name: 'hls-rendition-enabled' });\n      });\n    }\n\n    /**\n     * A helper function for triggerring presence usage events once per source\n     *\n     * @private\n     */\n  }, {\n    key: 'triggerPresenceUsage_',\n    value: function triggerPresenceUsage_(master, media) {\n      var mediaGroups = master.mediaGroups || {};\n      var defaultDemuxed = true;\n      var audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n\n      for (var mediaGroup in mediaGroups.AUDIO) {\n        for (var label in mediaGroups.AUDIO[mediaGroup]) {\n          var properties = mediaGroups.AUDIO[mediaGroup][label];\n\n          if (!properties.uri) {\n            defaultDemuxed = false;\n          }\n        }\n      }\n\n      if (defaultDemuxed) {\n        this.tech_.trigger({ type: 'usage', name: 'hls-demuxed' });\n      }\n\n      if (Object.keys(mediaGroups.SUBTITLES).length) {\n        this.tech_.trigger({ type: 'usage', name: 'hls-webvtt' });\n      }\n\n      if (Hls.Playlist.isAes(media)) {\n        this.tech_.trigger({ type: 'usage', name: 'hls-aes' });\n      }\n\n      if (Hls.Playlist.isFmp4(media)) {\n        this.tech_.trigger({ type: 'usage', name: 'hls-fmp4' });\n      }\n\n      if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n        this.tech_.trigger({ type: 'usage', name: 'hls-alternate-audio' });\n      }\n\n      if (this.useCueTags_) {\n        this.tech_.trigger({ type: 'usage', name: 'hls-playlist-cue-tags' });\n      }\n    }\n\n    /**\n     * Register event handlers on the segment loaders. A helper function\n     * for construction time.\n     *\n     * @private\n     */\n  }, {\n    key: 'setupSegmentLoaderListeners_',\n    value: function setupSegmentLoaderListeners_() {\n      var _this3 = this;\n\n      this.mainSegmentLoader_.on('bandwidthupdate', function () {\n        var nextPlaylist = _this3.selectPlaylist();\n        var currentPlaylist = _this3.masterPlaylistLoader_.media();\n        var buffered = _this3.tech_.buffered();\n        var forwardBuffer = buffered.length ? buffered.end(buffered.length - 1) - _this3.tech_.currentTime() : 0;\n\n        var bufferLowWaterLine = _this3.bufferLowWaterLine();\n\n        // If the playlist is live, then we want to not take low water line into account.\n        // This is because in LIVE, the player plays 3 segments from the end of the\n        // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n        // in those segments, a viewer will never experience a rendition upswitch.\n        if (!currentPlaylist.endList ||\n        // For the same reason as LIVE, we ignore the low water line when the VOD\n        // duration is below the max potential low water line\n        _this3.duration() < _config2['default'].MAX_BUFFER_LOW_WATER_LINE ||\n        // we want to switch down to lower resolutions quickly to continue playback, but\n        nextPlaylist.attributes.BANDWIDTH < currentPlaylist.attributes.BANDWIDTH ||\n        // ensure we have some buffer before we switch up to prevent us running out of\n        // buffer while loading a higher rendition.\n        forwardBuffer >= bufferLowWaterLine) {\n          _this3.masterPlaylistLoader_.media(nextPlaylist);\n        }\n\n        _this3.tech_.trigger('bandwidthupdate');\n      });\n      this.mainSegmentLoader_.on('progress', function () {\n        _this3.trigger('progress');\n      });\n\n      this.mainSegmentLoader_.on('error', function () {\n        _this3.blacklistCurrentPlaylist(_this3.mainSegmentLoader_.error());\n      });\n\n      this.mainSegmentLoader_.on('syncinfoupdate', function () {\n        _this3.onSyncInfoUpdate_();\n      });\n\n      this.mainSegmentLoader_.on('timestampoffset', function () {\n        _this3.tech_.trigger({ type: 'usage', name: 'hls-timestamp-offset' });\n      });\n      this.audioSegmentLoader_.on('syncinfoupdate', function () {\n        _this3.onSyncInfoUpdate_();\n      });\n\n      this.mainSegmentLoader_.on('ended', function () {\n        _this3.onEndOfStream();\n      });\n\n      this.mainSegmentLoader_.on('earlyabort', function () {\n        _this3.blacklistCurrentPlaylist({\n          message: 'Aborted early because there isn\\'t enough bandwidth to complete the ' + 'request without rebuffering.'\n        }, ABORT_EARLY_BLACKLIST_SECONDS);\n      });\n\n      this.mainSegmentLoader_.on('reseteverything', function () {\n        // If playing an MTS stream, a videojs.MediaSource is listening for\n        // hls-reset to reset caption parsing state in the transmuxer\n        _this3.tech_.trigger('hls-reset');\n      });\n\n      this.mainSegmentLoader_.on('segmenttimemapping', function (event) {\n        // If playing an MTS stream in html, a videojs.MediaSource is listening for\n        // hls-segment-time-mapping update its internal mapping of stream to display time\n        _this3.tech_.trigger({\n          type: 'hls-segment-time-mapping',\n          mapping: event.mapping\n        });\n      });\n\n      this.audioSegmentLoader_.on('ended', function () {\n        _this3.onEndOfStream();\n      });\n    }\n  }, {\n    key: 'mediaSecondsLoaded_',\n    value: function mediaSecondsLoaded_() {\n      return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n    }\n\n    /**\n     * Call load on our SegmentLoaders\n     */\n  }, {\n    key: 'load',\n    value: function load() {\n      this.mainSegmentLoader_.load();\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        this.audioSegmentLoader_.load();\n      }\n      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n        this.subtitleSegmentLoader_.load();\n      }\n    }\n\n    /**\n     * Re-tune playback quality level for the current player\n     * conditions. This method may perform destructive actions, like\n     * removing already buffered content, to readjust the currently\n     * active playlist quickly.\n     *\n     * @private\n     */\n  }, {\n    key: 'fastQualityChange_',\n    value: function fastQualityChange_() {\n      var media = this.selectPlaylist();\n\n      if (media !== this.masterPlaylistLoader_.media()) {\n        this.masterPlaylistLoader_.media(media);\n\n        this.mainSegmentLoader_.resetLoader();\n        // don't need to reset audio as it is reset when media changes\n      }\n    }\n\n    /**\n     * Begin playback.\n     */\n  }, {\n    key: 'play',\n    value: function play() {\n      if (this.setupFirstPlay()) {\n        return;\n      }\n\n      if (this.tech_.ended()) {\n        this.tech_.setCurrentTime(0);\n      }\n\n      if (this.hasPlayed_()) {\n        this.load();\n      }\n\n      var seekable = this.tech_.seekable();\n\n      // if the viewer has paused and we fell out of the live window,\n      // seek forward to the live point\n      if (this.tech_.duration() === Infinity) {\n        if (this.tech_.currentTime() < seekable.start(0)) {\n          return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));\n        }\n      }\n    }\n\n    /**\n     * Seek to the latest media position if this is a live video and the\n     * player and video are loaded and initialized.\n     */\n  }, {\n    key: 'setupFirstPlay',\n    value: function setupFirstPlay() {\n      var _this4 = this;\n\n      var media = this.masterPlaylistLoader_.media();\n\n      // Check that everything is ready to begin buffering for the first call to play\n      //  If 1) there is no active media\n      //     2) the player is paused\n      //     3) the first play has already been setup\n      // then exit early\n      if (!media || this.tech_.paused() || this.hasPlayed_()) {\n        return false;\n      }\n\n      // when the video is a live stream\n      if (!media.endList) {\n        var _ret3 = (function () {\n          var seekable = _this4.seekable();\n\n          if (!seekable.length) {\n            // without a seekable range, the player cannot seek to begin buffering at the live\n            // point\n            return {\n              v: false\n            };\n          }\n\n          if (_videoJs2['default'].browser.IE_VERSION && _this4.mode_ === 'html5' && _this4.tech_.readyState() === 0) {\n            // IE11 throws an InvalidStateError if you try to set currentTime while the\n            // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n            _this4.tech_.one('loadedmetadata', function () {\n              _this4.trigger('firstplay');\n              _this4.tech_.setCurrentTime(seekable.end(0));\n              _this4.hasPlayed_ = function () {\n                return true;\n              };\n            });\n\n            return {\n              v: false\n            };\n          }\n\n          // trigger firstplay to inform the source handler to ignore the next seek event\n          _this4.trigger('firstplay');\n          // seek to the live point\n          _this4.tech_.setCurrentTime(seekable.end(0));\n        })();\n\n        if (typeof _ret3 === 'object') return _ret3.v;\n      }\n\n      this.hasPlayed_ = function () {\n        return true;\n      };\n      // we can begin loading now that everything is ready\n      this.load();\n      return true;\n    }\n\n    /**\n     * handle the sourceopen event on the MediaSource\n     *\n     * @private\n     */\n  }, {\n    key: 'handleSourceOpen_',\n    value: function handleSourceOpen_() {\n      // Only attempt to create the source buffer if none already exist.\n      // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n      // after `endOfStream` has been called (in response to a seek for instance)\n      try {\n        this.setupSourceBuffers_();\n      } catch (e) {\n        _videoJs2['default'].log.warn('Failed to create Source Buffers', e);\n        return this.mediaSource.endOfStream('decode');\n      }\n\n      // if autoplay is enabled, begin playback. This is duplicative of\n      // code in video.js but is required because play() must be invoked\n      // *after* the media source has opened.\n      if (this.tech_.autoplay()) {\n        var playPromise = this.tech_.play();\n\n        // Catch/silence error when a pause interrupts a play request\n        // on browsers which return a promise\n        if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n          playPromise.then(null, function (e) {});\n        }\n      }\n\n      this.trigger('sourceopen');\n    }\n\n    /**\n     * Calls endOfStream on the media source when all active stream types have called\n     * endOfStream\n     *\n     * @param {string} streamType\n     *        Stream type of the segment loader that called endOfStream\n     * @private\n     */\n  }, {\n    key: 'onEndOfStream',\n    value: function onEndOfStream() {\n      var isEndOfStream = this.mainSegmentLoader_.ended_;\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        // if the audio playlist loader exists, then alternate audio is active, so we need\n        // to wait for both the main and audio segment loaders to call endOfStream\n        isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n      }\n\n      if (isEndOfStream) {\n        this.mediaSource.endOfStream();\n      }\n    }\n\n    /**\n     * Check if a playlist has stopped being updated\n     * @param {Object} playlist the media playlist object\n     * @return {boolean} whether the playlist has stopped being updated or not\n     */\n  }, {\n    key: 'stuckAtPlaylistEnd_',\n    value: function stuckAtPlaylistEnd_(playlist) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        // playlist doesn't have enough information to determine whether we are stuck\n        return false;\n      }\n\n      var expired = this.syncController_.getExpiredTime(playlist, this.mediaSource.duration);\n\n      if (expired === null) {\n        return false;\n      }\n\n      // does not use the safe live end to calculate playlist end, since we\n      // don't want to say we are stuck while there is still content\n      var absolutePlaylistEnd = Hls.Playlist.playlistEnd(playlist, expired);\n      var currentTime = this.tech_.currentTime();\n      var buffered = this.tech_.buffered();\n\n      if (!buffered.length) {\n        // return true if the playhead reached the absolute end of the playlist\n        return absolutePlaylistEnd - currentTime <= _ranges2['default'].SAFE_TIME_DELTA;\n      }\n      var bufferedEnd = buffered.end(buffered.length - 1);\n\n      // return true if there is too little buffer left and buffer has reached absolute\n      // end of playlist\n      return bufferedEnd - currentTime <= _ranges2['default'].SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= _ranges2['default'].SAFE_TIME_DELTA;\n    }\n\n    /**\n     * Blacklists a playlist when an error occurs for a set amount of time\n     * making it unavailable for selection by the rendition selection algorithm\n     * and then forces a new playlist (rendition) selection.\n     *\n     * @param {Object=} error an optional error that may include the playlist\n     * to blacklist\n     * @param {Number=} blacklistDuration an optional number of seconds to blacklist the\n     * playlist\n     */\n  }, {\n    key: 'blacklistCurrentPlaylist',\n    value: function blacklistCurrentPlaylist(error, blacklistDuration) {\n      if (error === undefined) error = {};\n\n      var currentPlaylist = undefined;\n      var nextPlaylist = undefined;\n\n      // If the `error` was generated by the playlist loader, it will contain\n      // the playlist we were trying to load (but failed) and that should be\n      // blacklisted instead of the currently selected playlist which is likely\n      // out-of-date in this scenario\n      currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();\n\n      blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration;\n\n      // If there is no current playlist, then an error occurred while we were\n      // trying to load the master OR while we were disposing of the tech\n      if (!currentPlaylist) {\n        this.error = error;\n\n        try {\n          return this.mediaSource.endOfStream('network');\n        } catch (e) {\n          return this.trigger('error');\n        }\n      }\n\n      var isFinalRendition = this.masterPlaylistLoader_.master.playlists.filter(_playlistJs.isEnabled).length === 1;\n\n      if (isFinalRendition) {\n        // Never blacklisting this playlist because it's final rendition\n        _videoJs2['default'].log.warn('Problem encountered with the current ' + 'HLS playlist. Trying again since it is the final playlist.');\n\n        this.tech_.trigger('retryplaylist');\n        return this.masterPlaylistLoader_.load(isFinalRendition);\n      }\n      // Blacklist this playlist\n      currentPlaylist.excludeUntil = Date.now() + blacklistDuration * 1000;\n      this.tech_.trigger('blacklistplaylist');\n      this.tech_.trigger({ type: 'usage', name: 'hls-rendition-blacklisted' });\n\n      // Select a new playlist\n      nextPlaylist = this.selectPlaylist();\n      _videoJs2['default'].log.warn('Problem encountered with the current HLS playlist.' + (error.message ? ' ' + error.message : '') + ' Switching to another playlist.');\n\n      return this.masterPlaylistLoader_.media(nextPlaylist);\n    }\n\n    /**\n     * Pause all segment loaders\n     */\n  }, {\n    key: 'pauseLoading',\n    value: function pauseLoading() {\n      this.mainSegmentLoader_.pause();\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        this.audioSegmentLoader_.pause();\n      }\n      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n        this.subtitleSegmentLoader_.pause();\n      }\n    }\n\n    /**\n     * set the current time on all segment loaders\n     *\n     * @param {TimeRange} currentTime the current time to set\n     * @return {TimeRange} the current time\n     */\n  }, {\n    key: 'setCurrentTime',\n    value: function setCurrentTime(currentTime) {\n      var buffered = _ranges2['default'].findRange(this.tech_.buffered(), currentTime);\n\n      if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {\n        // return immediately if the metadata is not ready yet\n        return 0;\n      }\n\n      // it's clearly an edge-case but don't thrown an error if asked to\n      // seek within an empty playlist\n      if (!this.masterPlaylistLoader_.media().segments) {\n        return 0;\n      }\n\n      // In flash playback, the segment loaders should be reset on every seek, even\n      // in buffer seeks. If the seek location is already buffered, continue buffering as\n      // usual\n      if (buffered && buffered.length && this.mode_ !== 'flash') {\n        return currentTime;\n      }\n\n      // cancel outstanding requests so we begin buffering at the new\n      // location\n      this.mainSegmentLoader_.resetEverything();\n      this.mainSegmentLoader_.abort();\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        this.audioSegmentLoader_.resetEverything();\n        this.audioSegmentLoader_.abort();\n      }\n      if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n        this.subtitleSegmentLoader_.resetEverything();\n        this.subtitleSegmentLoader_.abort();\n      }\n\n      // start segment loader loading in case they are paused\n      this.load();\n    }\n\n    /**\n     * get the current duration\n     *\n     * @return {TimeRange} the duration\n     */\n  }, {\n    key: 'duration',\n    value: function duration() {\n      if (!this.masterPlaylistLoader_) {\n        return 0;\n      }\n\n      if (this.mediaSource) {\n        return this.mediaSource.duration;\n      }\n\n      return Hls.Playlist.duration(this.masterPlaylistLoader_.media());\n    }\n\n    /**\n     * check the seekable range\n     *\n     * @return {TimeRange} the seekable range\n     */\n  }, {\n    key: 'seekable',\n    value: function seekable() {\n      return this.seekable_;\n    }\n  }, {\n    key: 'onSyncInfoUpdate_',\n    value: function onSyncInfoUpdate_() {\n      var mainSeekable = undefined;\n      var audioSeekable = undefined;\n\n      if (!this.masterPlaylistLoader_) {\n        return;\n      }\n\n      var media = this.masterPlaylistLoader_.media();\n\n      if (!media) {\n        return;\n      }\n\n      var expired = this.syncController_.getExpiredTime(media, this.mediaSource.duration);\n\n      if (expired === null) {\n        // not enough information to update seekable\n        return;\n      }\n\n      mainSeekable = Hls.Playlist.seekable(media, expired);\n\n      if (mainSeekable.length === 0) {\n        return;\n      }\n\n      if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n        media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n        expired = this.syncController_.getExpiredTime(media, this.mediaSource.duration);\n\n        if (expired === null) {\n          return;\n        }\n\n        audioSeekable = Hls.Playlist.seekable(media, expired);\n\n        if (audioSeekable.length === 0) {\n          return;\n        }\n      }\n\n      if (!audioSeekable) {\n        // seekable has been calculated based on buffering video data so it\n        // can be returned directly\n        this.seekable_ = mainSeekable;\n      } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n        // seekables are pretty far off, rely on main\n        this.seekable_ = mainSeekable;\n      } else {\n        this.seekable_ = _videoJs2['default'].createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n      }\n\n      this.tech_.trigger('seekablechanged');\n    }\n\n    /**\n     * Update the player duration\n     */\n  }, {\n    key: 'updateDuration',\n    value: function updateDuration() {\n      var _this5 = this;\n\n      var oldDuration = this.mediaSource.duration;\n      var newDuration = Hls.Playlist.duration(this.masterPlaylistLoader_.media());\n      var buffered = this.tech_.buffered();\n      var setDuration = function setDuration() {\n        _this5.mediaSource.duration = newDuration;\n        _this5.tech_.trigger('durationchange');\n\n        _this5.mediaSource.removeEventListener('sourceopen', setDuration);\n      };\n\n      if (buffered.length > 0) {\n        newDuration = Math.max(newDuration, buffered.end(buffered.length - 1));\n      }\n\n      // if the duration has changed, invalidate the cached value\n      if (oldDuration !== newDuration) {\n        // update the duration\n        if (this.mediaSource.readyState !== 'open') {\n          this.mediaSource.addEventListener('sourceopen', setDuration);\n        } else {\n          setDuration();\n        }\n      }\n    }\n\n    /**\n     * dispose of the MasterPlaylistController and everything\n     * that it controls\n     */\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      var _this6 = this;\n\n      this.decrypter_.terminate();\n      this.masterPlaylistLoader_.dispose();\n      this.mainSegmentLoader_.dispose();\n\n      ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n        var groups = _this6.mediaTypes_[type].groups;\n\n        for (var id in groups) {\n          groups[id].forEach(function (group) {\n            if (group.playlistLoader) {\n              group.playlistLoader.dispose();\n            }\n          });\n        }\n      });\n\n      this.audioSegmentLoader_.dispose();\n      this.subtitleSegmentLoader_.dispose();\n    }\n\n    /**\n     * return the master playlist object if we have one\n     *\n     * @return {Object} the master playlist object that we parsed\n     */\n  }, {\n    key: 'master',\n    value: function master() {\n      return this.masterPlaylistLoader_.master;\n    }\n\n    /**\n     * return the currently selected playlist\n     *\n     * @return {Object} the currently selected playlist object that we parsed\n     */\n  }, {\n    key: 'media',\n    value: function media() {\n      // playlist loader will not return media if it has not been fully loaded\n      return this.masterPlaylistLoader_.media() || this.initialMedia_;\n    }\n\n    /**\n     * setup our internal source buffers on our segment Loaders\n     *\n     * @private\n     */\n  }, {\n    key: 'setupSourceBuffers_',\n    value: function setupSourceBuffers_() {\n      var media = this.masterPlaylistLoader_.media();\n      var mimeTypes = undefined;\n\n      // wait until a media playlist is available and the Media Source is\n      // attached\n      if (!media || this.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      mimeTypes = mimeTypesForPlaylist_(this.masterPlaylistLoader_.master, media);\n      if (mimeTypes.length < 1) {\n        this.error = 'No compatible SourceBuffer configuration for the variant stream:' + media.resolvedUri;\n        return this.mediaSource.endOfStream('decode');\n      }\n      this.mainSegmentLoader_.mimeType(mimeTypes[0]);\n      if (mimeTypes[1]) {\n        this.audioSegmentLoader_.mimeType(mimeTypes[1]);\n      }\n\n      // exclude any incompatible variant streams from future playlist\n      // selection\n      this.excludeIncompatibleVariants_(media);\n    }\n\n    /**\n     * Blacklist playlists that are known to be codec or\n     * stream-incompatible with the SourceBuffer configuration. For\n     * instance, Media Source Extensions would cause the video element to\n     * stall waiting for video data if you switched from a variant with\n     * video and audio to an audio-only one.\n     *\n     * @param {Object} media a media playlist compatible with the current\n     * set of SourceBuffers. Variants in the current master playlist that\n     * do not appear to have compatible codec or stream configurations\n     * will be excluded from the default playlist selection algorithm\n     * indefinitely.\n     * @private\n     */\n  }, {\n    key: 'excludeIncompatibleVariants_',\n    value: function excludeIncompatibleVariants_(media) {\n      var master = this.masterPlaylistLoader_.master;\n      var codecCount = 2;\n      var videoCodec = null;\n      var codecs = undefined;\n\n      if (media.attributes.CODECS) {\n        codecs = (0, _utilCodecsJs.parseCodecs)(media.attributes.CODECS);\n        videoCodec = codecs.videoCodec;\n        codecCount = codecs.codecCount;\n      }\n      master.playlists.forEach(function (variant) {\n        var variantCodecs = {\n          codecCount: 2,\n          videoCodec: null\n        };\n\n        if (variant.attributes.CODECS) {\n          var codecString = variant.attributes.CODECS;\n\n          variantCodecs = (0, _utilCodecsJs.parseCodecs)(codecString);\n\n          if (window.MediaSource && window.MediaSource.isTypeSupported && !window.MediaSource.isTypeSupported('video/mp4; codecs=\"' + mapLegacyAvcCodecs_(codecString) + '\"')) {\n            variant.excludeUntil = Infinity;\n          }\n        }\n\n        // if the streams differ in the presence or absence of audio or\n        // video, they are incompatible\n        if (variantCodecs.codecCount !== codecCount) {\n          variant.excludeUntil = Infinity;\n        }\n\n        // if h.264 is specified on the current playlist, some flavor of\n        // it must be specified on all compatible variants\n        if (variantCodecs.videoCodec !== videoCodec) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n    }\n  }, {\n    key: 'updateAdCues_',\n    value: function updateAdCues_(media) {\n      var offset = 0;\n      var seekable = this.seekable();\n\n      if (seekable.length) {\n        offset = seekable.start(0);\n      }\n\n      _adCueTags2['default'].updateAdCues(media, this.cueTagsTrack_, offset);\n    }\n\n    /**\n     * Calculates the desired forward buffer length based on current time\n     *\n     * @return {Number} Desired forward buffer length in seconds\n     */\n  }, {\n    key: 'goalBufferLength',\n    value: function goalBufferLength() {\n      var currentTime = this.tech_.currentTime();\n      var initial = _config2['default'].GOAL_BUFFER_LENGTH;\n      var rate = _config2['default'].GOAL_BUFFER_LENGTH_RATE;\n      var max = Math.max(initial, _config2['default'].MAX_GOAL_BUFFER_LENGTH);\n\n      return Math.min(initial + currentTime * rate, max);\n    }\n\n    /**\n     * Calculates the desired buffer low water line based on current time\n     *\n     * @return {Number} Desired buffer low water line in seconds\n     */\n  }, {\n    key: 'bufferLowWaterLine',\n    value: function bufferLowWaterLine() {\n      var currentTime = this.tech_.currentTime();\n      var initial = _config2['default'].BUFFER_LOW_WATER_LINE;\n      var rate = _config2['default'].BUFFER_LOW_WATER_LINE_RATE;\n      var max = Math.max(initial, _config2['default'].MAX_BUFFER_LOW_WATER_LINE);\n\n      return Math.min(initial + currentTime * rate, max);\n    }\n  }]);\n\n  return MasterPlaylistController;\n})(_videoJs2['default'].EventTarget);\n\nexports.MasterPlaylistController = MasterPlaylistController;","'use strict';\nvar regexpFlags = require('./regexp-flags');\nvar stickyHelpers = require('./regexp-sticky-helpers');\nvar shared = require('./shared');\n\nvar nativeExec = RegExp.prototype.exec;\n// This always refers to the native implementation, because the\n// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,\n// which loads this file before patching the method.\nvar nativeReplace = shared('native-string-replace', String.prototype.replace);\n\nvar patchedExec = nativeExec;\n\nvar UPDATES_LAST_INDEX_WRONG = (function () {\n  var re1 = /a/;\n  var re2 = /b*/g;\n  nativeExec.call(re1, 'a');\n  nativeExec.call(re2, 'a');\n  return re1.lastIndex !== 0 || re2.lastIndex !== 0;\n})();\n\nvar UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y || stickyHelpers.BROKEN_CARET;\n\n// nonparticipating capturing group, copied from es5-shim's String#split patch.\n// eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing\nvar NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;\n\nvar PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y;\n\nif (PATCH) {\n  patchedExec = function exec(str) {\n    var re = this;\n    var lastIndex, reCopy, match, i;\n    var sticky = UNSUPPORTED_Y && re.sticky;\n    var flags = regexpFlags.call(re);\n    var source = re.source;\n    var charsAdded = 0;\n    var strCopy = str;\n\n    if (sticky) {\n      flags = flags.replace('y', '');\n      if (flags.indexOf('g') === -1) {\n        flags += 'g';\n      }\n\n      strCopy = String(str).slice(re.lastIndex);\n      // Support anchored sticky behavior.\n      if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\\n')) {\n        source = '(?: ' + source + ')';\n        strCopy = ' ' + strCopy;\n        charsAdded++;\n      }\n      // ^(? + rx + ) is needed, in combination with some str slicing, to\n      // simulate the 'y' flag.\n      reCopy = new RegExp('^(?:' + source + ')', flags);\n    }\n\n    if (NPCG_INCLUDED) {\n      reCopy = new RegExp('^' + source + '$(?!\\\\s)', flags);\n    }\n    if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;\n\n    match = nativeExec.call(sticky ? reCopy : re, strCopy);\n\n    if (sticky) {\n      if (match) {\n        match.input = match.input.slice(charsAdded);\n        match[0] = match[0].slice(charsAdded);\n        match.index = re.lastIndex;\n        re.lastIndex += match[0].length;\n      } else re.lastIndex = 0;\n    } else if (UPDATES_LAST_INDEX_WRONG && match) {\n      re.lastIndex = re.global ? match.index + match[0].length : lastIndex;\n    }\n    if (NPCG_INCLUDED && match && match.length > 1) {\n      // Fix browsers whose `exec` methods don't consistently return `undefined`\n      // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/\n      nativeReplace.call(match[0], reCopy, function () {\n        for (i = 1; i < arguments.length - 2; i++) {\n          if (arguments[i] === undefined) match[i] = undefined;\n        }\n      });\n    }\n\n    return match;\n  };\n}\n\nmodule.exports = patchedExec;\n","/**\n * @file flash-media-source.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _globalDocument = require('global/document');\n\nvar _globalDocument2 = _interopRequireDefault(_globalDocument);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _flashSourceBuffer = require('./flash-source-buffer');\n\nvar _flashSourceBuffer2 = _interopRequireDefault(_flashSourceBuffer);\n\nvar _flashConstants = require('./flash-constants');\n\nvar _flashConstants2 = _interopRequireDefault(_flashConstants);\n\nvar _codecUtils = require('./codec-utils');\n\n/**\n * A flash implmentation of HTML MediaSources and a polyfill\n * for browsers that don't support native or HTML MediaSources..\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource\n * @class FlashMediaSource\n * @extends videojs.EventTarget\n */\n\nvar FlashMediaSource = (function (_videojs$EventTarget) {\n  _inherits(FlashMediaSource, _videojs$EventTarget);\n\n  function FlashMediaSource() {\n    var _this = this;\n\n    _classCallCheck(this, FlashMediaSource);\n\n    _get(Object.getPrototypeOf(FlashMediaSource.prototype), 'constructor', this).call(this);\n    this.sourceBuffers = [];\n    this.readyState = 'closed';\n\n    this.on(['sourceopen', 'webkitsourceopen'], function (event) {\n      // find the swf where we will push media data\n      _this.swfObj = _globalDocument2['default'].getElementById(event.swfId);\n      _this.player_ = (0, _videoJs2['default'])(_this.swfObj.parentNode);\n      _this.tech_ = _this.swfObj.tech;\n      _this.readyState = 'open';\n\n      _this.tech_.on('seeking', function () {\n        var i = _this.sourceBuffers.length;\n\n        while (i--) {\n          _this.sourceBuffers[i].abort();\n        }\n      });\n\n      // trigger load events\n      if (_this.swfObj) {\n        _this.swfObj.vjs_load();\n      }\n    });\n  }\n\n  /**\n    * Set or return the presentation duration.\n    *\n    * @param {Double} value the duration of the media in seconds\n    * @param {Double} the current presentation duration\n    * @link http://www.w3.org/TR/media-source/#widl-MediaSource-duration\n    */\n\n  /**\n   * We have this function so that the html and flash interfaces\n   * are the same.\n   *\n   * @private\n   */\n\n  _createClass(FlashMediaSource, [{\n    key: 'addSeekableRange_',\n    value: function addSeekableRange_() {}\n    // intentional no-op\n\n    /**\n     * Create a new flash source buffer and add it to our flash media source.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/addSourceBuffer\n     * @param {String} type the content-type of the source\n     * @return {Object} the flash source buffer\n     */\n\n  }, {\n    key: 'addSourceBuffer',\n    value: function addSourceBuffer(type) {\n      var parsedType = (0, _codecUtils.parseContentType)(type);\n      var sourceBuffer = undefined;\n\n      // if this is an FLV type, we'll push data to flash\n      if (parsedType.type === 'video/mp2t' || parsedType.type === 'audio/mp2t') {\n        // Flash source buffers\n        sourceBuffer = new _flashSourceBuffer2['default'](this);\n      } else {\n        throw new Error('NotSupportedError (Video.js)');\n      }\n\n      this.sourceBuffers.push(sourceBuffer);\n      return sourceBuffer;\n    }\n\n    /**\n     * Signals the end of the stream.\n     *\n     * @link https://w3c.github.io/media-source/#widl-MediaSource-endOfStream-void-EndOfStreamError-error\n     * @param {String=} error Signals that a playback error\n     * has occurred. If specified, it must be either \"network\" or\n     * \"decode\".\n     */\n  }, {\n    key: 'endOfStream',\n    value: function endOfStream(error) {\n      if (error === 'network') {\n        // MEDIA_ERR_NETWORK\n        this.tech_.error(2);\n      } else if (error === 'decode') {\n        // MEDIA_ERR_DECODE\n        this.tech_.error(3);\n      }\n      if (this.readyState !== 'ended') {\n        this.readyState = 'ended';\n        this.swfObj.vjs_endOfStream();\n      }\n    }\n  }]);\n\n  return FlashMediaSource;\n})(_videoJs2['default'].EventTarget);\n\nexports['default'] = FlashMediaSource;\ntry {\n  Object.defineProperty(FlashMediaSource.prototype, 'duration', {\n    /**\n     * Return the presentation duration.\n     *\n     * @return {Double} the duration of the media in seconds\n     * @link http://www.w3.org/TR/media-source/#widl-MediaSource-duration\n     */\n    get: function get() {\n      if (!this.swfObj) {\n        return NaN;\n      }\n      // get the current duration from the SWF\n      return this.swfObj.vjs_getProperty('duration');\n    },\n    /**\n     * Set the presentation duration.\n     *\n     * @param {Double} value the duration of the media in seconds\n     * @return {Double} the duration of the media in seconds\n     * @link http://www.w3.org/TR/media-source/#widl-MediaSource-duration\n     */\n    set: function set(value) {\n      var i = undefined;\n      var oldDuration = this.swfObj.vjs_getProperty('duration');\n\n      this.swfObj.vjs_setProperty('duration', value);\n\n      if (value < oldDuration) {\n        // In MSE, this triggers the range removal algorithm which causes\n        // an update to occur\n        for (i = 0; i < this.sourceBuffers.length; i++) {\n          this.sourceBuffers[i].remove(value, oldDuration);\n        }\n      }\n\n      return value;\n    }\n  });\n} catch (e) {\n  // IE8 throws if defineProperty is called on a non-DOM node. We\n  // don't support IE8 but we shouldn't throw an error if loaded\n  // there.\n  FlashMediaSource.prototype.duration = NaN;\n}\n\nfor (var property in _flashConstants2['default']) {\n  FlashMediaSource[property] = _flashConstants2['default'][property];\n}\nmodule.exports = exports['default'];","'use strict'\nvar Buffer = require('safe-buffer').Buffer\nvar Transform = require('readable-stream').Transform\nvar inherits = require('inherits')\n\nfunction throwIfNotStringOrBuffer (val, prefix) {\n  if (!Buffer.isBuffer(val) && typeof val !== 'string') {\n    throw new TypeError(prefix + ' must be a string or a buffer')\n  }\n}\n\nfunction HashBase (blockSize) {\n  Transform.call(this)\n\n  this._block = Buffer.allocUnsafe(blockSize)\n  this._blockSize = blockSize\n  this._blockOffset = 0\n  this._length = [0, 0, 0, 0]\n\n  this._finalized = false\n}\n\ninherits(HashBase, Transform)\n\nHashBase.prototype._transform = function (chunk, encoding, callback) {\n  var error = null\n  try {\n    this.update(chunk, encoding)\n  } catch (err) {\n    error = err\n  }\n\n  callback(error)\n}\n\nHashBase.prototype._flush = function (callback) {\n  var error = null\n  try {\n    this.push(this.digest())\n  } catch (err) {\n    error = err\n  }\n\n  callback(error)\n}\n\nHashBase.prototype.update = function (data, encoding) {\n  throwIfNotStringOrBuffer(data, 'Data')\n  if (this._finalized) throw new Error('Digest already called')\n  if (!Buffer.isBuffer(data)) data = Buffer.from(data, encoding)\n\n  // consume data\n  var block = this._block\n  var offset = 0\n  while (this._blockOffset + data.length - offset >= this._blockSize) {\n    for (var i = this._blockOffset; i < this._blockSize;) block[i++] = data[offset++]\n    this._update()\n    this._blockOffset = 0\n  }\n  while (offset < data.length) block[this._blockOffset++] = data[offset++]\n\n  // update length\n  for (var j = 0, carry = data.length * 8; carry > 0; ++j) {\n    this._length[j] += carry\n    carry = (this._length[j] / 0x0100000000) | 0\n    if (carry > 0) this._length[j] -= 0x0100000000 * carry\n  }\n\n  return this\n}\n\nHashBase.prototype._update = function () {\n  throw new Error('_update is not implemented')\n}\n\nHashBase.prototype.digest = function (encoding) {\n  if (this._finalized) throw new Error('Digest already called')\n  this._finalized = true\n\n  var digest = this._digest()\n  if (encoding !== undefined) digest = digest.toString(encoding)\n\n  // reset state\n  this._block.fill(0)\n  this._blockOffset = 0\n  for (var i = 0; i < 4; ++i) this._length[i] = 0\n\n  return digest\n}\n\nHashBase.prototype._digest = function () {\n  throw new Error('_digest is not implemented')\n}\n\nmodule.exports = HashBase\n","/**\n * @file create-text-tracks-if-necessary.js\n */\n\n/**\n * Create text tracks on video.js if they exist on a segment.\n *\n * @param {Object} sourceBuffer the VSB or FSB\n * @param {Object} mediaSource the HTML or Flash media source\n * @param {Object} segment the segment that may contain the text track\n * @private\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\nvar createTextTracksIfNecessary = function createTextTracksIfNecessary(sourceBuffer, mediaSource, segment) {\n  var player = mediaSource.player_;\n\n  // create an in-band caption track if one is present in the segment\n  if (segment.captions && segment.captions.length) {\n    if (!sourceBuffer.inbandTextTracks_) {\n      sourceBuffer.inbandTextTracks_ = {};\n    }\n\n    for (var trackId in segment.captionStreams) {\n      if (!sourceBuffer.inbandTextTracks_[trackId]) {\n        player.tech_.trigger({ type: 'usage', name: 'hls-608' });\n        var track = player.textTracks().getTrackById(trackId);\n\n        if (track) {\n          // Resuse an existing track with a CC# id because this was\n          // very likely created by videojs-contrib-hls from information\n          // in the m3u8 for us to use\n          sourceBuffer.inbandTextTracks_[trackId] = track;\n        } else {\n          // Otherwise, create a track with the default `CC#` label and\n          // without a language\n          sourceBuffer.inbandTextTracks_[trackId] = player.addRemoteTextTrack({\n            kind: 'captions',\n            id: trackId,\n            label: trackId\n          }, false).track;\n        }\n      }\n    }\n  }\n\n  if (segment.metadata && segment.metadata.length && !sourceBuffer.metadataTrack_) {\n    sourceBuffer.metadataTrack_ = player.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'Timed Metadata'\n    }, false).track;\n    sourceBuffer.metadataTrack_.inBandMetadataTrackDispatchType = segment.metadata.dispatchType;\n  }\n};\n\nexports['default'] = createTextTracksIfNecessary;\nmodule.exports = exports['default'];","export default function getAltAxis(axis) {\n  return axis === 'x' ? 'y' : 'x';\n}","import { top, left, right, bottom, start } from \"../enums.js\";\nimport getBasePlacement from \"../utils/getBasePlacement.js\";\nimport getMainAxisFromPlacement from \"../utils/getMainAxisFromPlacement.js\";\nimport getAltAxis from \"../utils/getAltAxis.js\";\nimport { within, withinMaxClamp } from \"../utils/within.js\";\nimport getLayoutRect from \"../dom-utils/getLayoutRect.js\";\nimport getOffsetParent from \"../dom-utils/getOffsetParent.js\";\nimport detectOverflow from \"../utils/detectOverflow.js\";\nimport getVariation from \"../utils/getVariation.js\";\nimport getFreshSideObject from \"../utils/getFreshSideObject.js\";\nimport { min as mathMin, max as mathMax } from \"../utils/math.js\";\n\nfunction preventOverflow(_ref) {\n  var state = _ref.state,\n      options = _ref.options,\n      name = _ref.name;\n  var _options$mainAxis = options.mainAxis,\n      checkMainAxis = _options$mainAxis === void 0 ? true : _options$mainAxis,\n      _options$altAxis = options.altAxis,\n      checkAltAxis = _options$altAxis === void 0 ? false : _options$altAxis,\n      boundary = options.boundary,\n      rootBoundary = options.rootBoundary,\n      altBoundary = options.altBoundary,\n      padding = options.padding,\n      _options$tether = options.tether,\n      tether = _options$tether === void 0 ? true : _options$tether,\n      _options$tetherOffset = options.tetherOffset,\n      tetherOffset = _options$tetherOffset === void 0 ? 0 : _options$tetherOffset;\n  var overflow = detectOverflow(state, {\n    boundary: boundary,\n    rootBoundary: rootBoundary,\n    padding: padding,\n    altBoundary: altBoundary\n  });\n  var basePlacement = getBasePlacement(state.placement);\n  var variation = getVariation(state.placement);\n  var isBasePlacement = !variation;\n  var mainAxis = getMainAxisFromPlacement(basePlacement);\n  var altAxis = getAltAxis(mainAxis);\n  var popperOffsets = state.modifiersData.popperOffsets;\n  var referenceRect = state.rects.reference;\n  var popperRect = state.rects.popper;\n  var tetherOffsetValue = typeof tetherOffset === 'function' ? tetherOffset(Object.assign({}, state.rects, {\n    placement: state.placement\n  })) : tetherOffset;\n  var normalizedTetherOffsetValue = typeof tetherOffsetValue === 'number' ? {\n    mainAxis: tetherOffsetValue,\n    altAxis: tetherOffsetValue\n  } : Object.assign({\n    mainAxis: 0,\n    altAxis: 0\n  }, tetherOffsetValue);\n  var offsetModifierState = state.modifiersData.offset ? state.modifiersData.offset[state.placement] : null;\n  var data = {\n    x: 0,\n    y: 0\n  };\n\n  if (!popperOffsets) {\n    return;\n  }\n\n  if (checkMainAxis) {\n    var _offsetModifierState$;\n\n    var mainSide = mainAxis === 'y' ? top : left;\n    var altSide = mainAxis === 'y' ? bottom : right;\n    var len = mainAxis === 'y' ? 'height' : 'width';\n    var offset = popperOffsets[mainAxis];\n    var min = offset + overflow[mainSide];\n    var max = offset - overflow[altSide];\n    var additive = tether ? -popperRect[len] / 2 : 0;\n    var minLen = variation === start ? referenceRect[len] : popperRect[len];\n    var maxLen = variation === start ? -popperRect[len] : -referenceRect[len]; // We need to include the arrow in the calculation so the arrow doesn't go\n    // outside the reference bounds\n\n    var arrowElement = state.elements.arrow;\n    var arrowRect = tether && arrowElement ? getLayoutRect(arrowElement) : {\n      width: 0,\n      height: 0\n    };\n    var arrowPaddingObject = state.modifiersData['arrow#persistent'] ? state.modifiersData['arrow#persistent'].padding : getFreshSideObject();\n    var arrowPaddingMin = arrowPaddingObject[mainSide];\n    var arrowPaddingMax = arrowPaddingObject[altSide]; // If the reference length is smaller than the arrow length, we don't want\n    // to include its full size in the calculation. If the reference is small\n    // and near the edge of a boundary, the popper can overflow even if the\n    // reference is not overflowing as well (e.g. virtual elements with no\n    // width or height)\n\n    var arrowLen = within(0, referenceRect[len], arrowRect[len]);\n    var minOffset = isBasePlacement ? referenceRect[len] / 2 - additive - arrowLen - arrowPaddingMin - normalizedTetherOffsetValue.mainAxis : minLen - arrowLen - arrowPaddingMin - normalizedTetherOffsetValue.mainAxis;\n    var maxOffset = isBasePlacement ? -referenceRect[len] / 2 + additive + arrowLen + arrowPaddingMax + normalizedTetherOffsetValue.mainAxis : maxLen + arrowLen + arrowPaddingMax + normalizedTetherOffsetValue.mainAxis;\n    var arrowOffsetParent = state.elements.arrow && getOffsetParent(state.elements.arrow);\n    var clientOffset = arrowOffsetParent ? mainAxis === 'y' ? arrowOffsetParent.clientTop || 0 : arrowOffsetParent.clientLeft || 0 : 0;\n    var offsetModifierValue = (_offsetModifierState$ = offsetModifierState == null ? void 0 : offsetModifierState[mainAxis]) != null ? _offsetModifierState$ : 0;\n    var tetherMin = offset + minOffset - offsetModifierValue - clientOffset;\n    var tetherMax = offset + maxOffset - offsetModifierValue;\n    var preventedOffset = within(tether ? mathMin(min, tetherMin) : min, offset, tether ? mathMax(max, tetherMax) : max);\n    popperOffsets[mainAxis] = preventedOffset;\n    data[mainAxis] = preventedOffset - offset;\n  }\n\n  if (checkAltAxis) {\n    var _offsetModifierState$2;\n\n    var _mainSide = mainAxis === 'x' ? top : left;\n\n    var _altSide = mainAxis === 'x' ? bottom : right;\n\n    var _offset = popperOffsets[altAxis];\n\n    var _len = altAxis === 'y' ? 'height' : 'width';\n\n    var _min = _offset + overflow[_mainSide];\n\n    var _max = _offset - overflow[_altSide];\n\n    var isOriginSide = [top, left].indexOf(basePlacement) !== -1;\n\n    var _offsetModifierValue = (_offsetModifierState$2 = offsetModifierState == null ? void 0 : offsetModifierState[altAxis]) != null ? _offsetModifierState$2 : 0;\n\n    var _tetherMin = isOriginSide ? _min : _offset - referenceRect[_len] - popperRect[_len] - _offsetModifierValue + normalizedTetherOffsetValue.altAxis;\n\n    var _tetherMax = isOriginSide ? _offset + referenceRect[_len] + popperRect[_len] - _offsetModifierValue - normalizedTetherOffsetValue.altAxis : _max;\n\n    var _preventedOffset = tether && isOriginSide ? withinMaxClamp(_tetherMin, _offset, _tetherMax) : within(tether ? _tetherMin : _min, _offset, tether ? _tetherMax : _max);\n\n    popperOffsets[altAxis] = _preventedOffset;\n    data[altAxis] = _preventedOffset - _offset;\n  }\n\n  state.modifiersData[name] = data;\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'preventOverflow',\n  enabled: true,\n  phase: 'main',\n  fn: preventOverflow,\n  requiresIfExists: ['offset']\n};","'use strict';\n\nvar hash = require('hash.js');\nvar curves = require('../curves');\nvar utils = require('../utils');\nvar assert = utils.assert;\nvar parseBytes = utils.parseBytes;\nvar KeyPair = require('./key');\nvar Signature = require('./signature');\n\nfunction EDDSA(curve) {\n  assert(curve === 'ed25519', 'only tested with ed25519 so far');\n\n  if (!(this instanceof EDDSA))\n    return new EDDSA(curve);\n\n  curve = curves[curve].curve;\n  this.curve = curve;\n  this.g = curve.g;\n  this.g.precompute(curve.n.bitLength() + 1);\n\n  this.pointClass = curve.point().constructor;\n  this.encodingLength = Math.ceil(curve.n.bitLength() / 8);\n  this.hash = hash.sha512;\n}\n\nmodule.exports = EDDSA;\n\n/**\n* @param {Array|String} message - message bytes\n* @param {Array|String|KeyPair} secret - secret bytes or a keypair\n* @returns {Signature} - signature\n*/\nEDDSA.prototype.sign = function sign(message, secret) {\n  message = parseBytes(message);\n  var key = this.keyFromSecret(secret);\n  var r = this.hashInt(key.messagePrefix(), message);\n  var R = this.g.mul(r);\n  var Rencoded = this.encodePoint(R);\n  var s_ = this.hashInt(Rencoded, key.pubBytes(), message)\n    .mul(key.priv());\n  var S = r.add(s_).umod(this.curve.n);\n  return this.makeSignature({ R: R, S: S, Rencoded: Rencoded });\n};\n\n/**\n* @param {Array} message - message bytes\n* @param {Array|String|Signature} sig - sig bytes\n* @param {Array|String|Point|KeyPair} pub - public key\n* @returns {Boolean} - true if public key matches sig of message\n*/\nEDDSA.prototype.verify = function verify(message, sig, pub) {\n  message = parseBytes(message);\n  sig = this.makeSignature(sig);\n  var key = this.keyFromPublic(pub);\n  var h = this.hashInt(sig.Rencoded(), key.pubBytes(), message);\n  var SG = this.g.mul(sig.S());\n  var RplusAh = sig.R().add(key.pub().mul(h));\n  return RplusAh.eq(SG);\n};\n\nEDDSA.prototype.hashInt = function hashInt() {\n  var hash = this.hash();\n  for (var i = 0; i < arguments.length; i++)\n    hash.update(arguments[i]);\n  return utils.intFromLE(hash.digest()).umod(this.curve.n);\n};\n\nEDDSA.prototype.keyFromPublic = function keyFromPublic(pub) {\n  return KeyPair.fromPublic(this, pub);\n};\n\nEDDSA.prototype.keyFromSecret = function keyFromSecret(secret) {\n  return KeyPair.fromSecret(this, secret);\n};\n\nEDDSA.prototype.makeSignature = function makeSignature(sig) {\n  if (sig instanceof Signature)\n    return sig;\n  return new Signature(this, sig);\n};\n\n/**\n* * https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-03#section-5.2\n*\n* EDDSA defines methods for encoding and decoding points and integers. These are\n* helper convenience methods, that pass along to utility functions implied\n* parameters.\n*\n*/\nEDDSA.prototype.encodePoint = function encodePoint(point) {\n  var enc = point.getY().toArray('le', this.encodingLength);\n  enc[this.encodingLength - 1] |= point.getX().isOdd() ? 0x80 : 0;\n  return enc;\n};\n\nEDDSA.prototype.decodePoint = function decodePoint(bytes) {\n  bytes = utils.parseBytes(bytes);\n\n  var lastIx = bytes.length - 1;\n  var normed = bytes.slice(0, lastIx).concat(bytes[lastIx] & ~0x80);\n  var xIsOdd = (bytes[lastIx] & 0x80) !== 0;\n\n  var y = utils.intFromLE(normed);\n  return this.curve.pointFromY(y, xIsOdd);\n};\n\nEDDSA.prototype.encodeInt = function encodeInt(num) {\n  return num.toArray('le', this.encodingLength);\n};\n\nEDDSA.prototype.decodeInt = function decodeInt(bytes) {\n  return utils.intFromLE(bytes);\n};\n\nEDDSA.prototype.isPoint = function isPoint(val) {\n  return val instanceof this.pointClass;\n};\n","var fails = require('../internals/fails');\n\nvar replacement = /#|\\.prototype\\./;\n\nvar isForced = function (feature, detection) {\n  var value = data[normalize(feature)];\n  return value == POLYFILL ? true\n    : value == NATIVE ? false\n    : typeof detection == 'function' ? fails(detection)\n    : !!detection;\n};\n\nvar normalize = isForced.normalize = function (string) {\n  return String(string).replace(replacement, '.').toLowerCase();\n};\n\nvar data = isForced.data = {};\nvar NATIVE = isForced.NATIVE = 'N';\nvar POLYFILL = isForced.POLYFILL = 'P';\n\nmodule.exports = isForced;\n",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function (Math) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var Hasher = C_lib.Hasher;\n\t    var C_algo = C.algo;\n\n\t    // Initialization and round constants tables\n\t    var H = [];\n\t    var K = [];\n\n\t    // Compute constants\n\t    (function () {\n\t        function isPrime(n) {\n\t            var sqrtN = Math.sqrt(n);\n\t            for (var factor = 2; factor <= sqrtN; factor++) {\n\t                if (!(n % factor)) {\n\t                    return false;\n\t                }\n\t            }\n\n\t            return true;\n\t        }\n\n\t        function getFractionalBits(n) {\n\t            return ((n - (n | 0)) * 0x100000000) | 0;\n\t        }\n\n\t        var n = 2;\n\t        var nPrime = 0;\n\t        while (nPrime < 64) {\n\t            if (isPrime(n)) {\n\t                if (nPrime < 8) {\n\t                    H[nPrime] = getFractionalBits(Math.pow(n, 1 / 2));\n\t                }\n\t                K[nPrime] = getFractionalBits(Math.pow(n, 1 / 3));\n\n\t                nPrime++;\n\t            }\n\n\t            n++;\n\t        }\n\t    }());\n\n\t    // Reusable object\n\t    var W = [];\n\n\t    /**\n\t     * SHA-256 hash algorithm.\n\t     */\n\t    var SHA256 = C_algo.SHA256 = Hasher.extend({\n\t        _doReset: function () {\n\t            this._hash = new WordArray.init(H.slice(0));\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Shortcut\n\t            var H = this._hash.words;\n\n\t            // Working variables\n\t            var a = H[0];\n\t            var b = H[1];\n\t            var c = H[2];\n\t            var d = H[3];\n\t            var e = H[4];\n\t            var f = H[5];\n\t            var g = H[6];\n\t            var h = H[7];\n\n\t            // Computation\n\t            for (var i = 0; i < 64; i++) {\n\t                if (i < 16) {\n\t                    W[i] = M[offset + i] | 0;\n\t                } else {\n\t                    var gamma0x = W[i - 15];\n\t                    var gamma0  = ((gamma0x << 25) | (gamma0x >>> 7))  ^\n\t                                  ((gamma0x << 14) | (gamma0x >>> 18)) ^\n\t                                   (gamma0x >>> 3);\n\n\t                    var gamma1x = W[i - 2];\n\t                    var gamma1  = ((gamma1x << 15) | (gamma1x >>> 17)) ^\n\t                                  ((gamma1x << 13) | (gamma1x >>> 19)) ^\n\t                                   (gamma1x >>> 10);\n\n\t                    W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16];\n\t                }\n\n\t                var ch  = (e & f) ^ (~e & g);\n\t                var maj = (a & b) ^ (a & c) ^ (b & c);\n\n\t                var sigma0 = ((a << 30) | (a >>> 2)) ^ ((a << 19) | (a >>> 13)) ^ ((a << 10) | (a >>> 22));\n\t                var sigma1 = ((e << 26) | (e >>> 6)) ^ ((e << 21) | (e >>> 11)) ^ ((e << 7)  | (e >>> 25));\n\n\t                var t1 = h + sigma1 + ch + K[i] + W[i];\n\t                var t2 = sigma0 + maj;\n\n\t                h = g;\n\t                g = f;\n\t                f = e;\n\t                e = (d + t1) | 0;\n\t                d = c;\n\t                c = b;\n\t                b = a;\n\t                a = (t1 + t2) | 0;\n\t            }\n\n\t            // Intermediate hash value\n\t            H[0] = (H[0] + a) | 0;\n\t            H[1] = (H[1] + b) | 0;\n\t            H[2] = (H[2] + c) | 0;\n\t            H[3] = (H[3] + d) | 0;\n\t            H[4] = (H[4] + e) | 0;\n\t            H[5] = (H[5] + f) | 0;\n\t            H[6] = (H[6] + g) | 0;\n\t            H[7] = (H[7] + h) | 0;\n\t        },\n\n\t        _doFinalize: function () {\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\n\t            var nBitsTotal = this._nDataBytes * 8;\n\t            var nBitsLeft = data.sigBytes * 8;\n\n\t            // Add padding\n\t            dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = Math.floor(nBitsTotal / 0x100000000);\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 15] = nBitsTotal;\n\t            data.sigBytes = dataWords.length * 4;\n\n\t            // Hash final blocks\n\t            this._process();\n\n\t            // Return final computed hash\n\t            return this._hash;\n\t        },\n\n\t        clone: function () {\n\t            var clone = Hasher.clone.call(this);\n\t            clone._hash = this._hash.clone();\n\n\t            return clone;\n\t        }\n\t    });\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.SHA256('message');\n\t     *     var hash = CryptoJS.SHA256(wordArray);\n\t     */\n\t    C.SHA256 = Hasher._createHelper(SHA256);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacSHA256(message, key);\n\t     */\n\t    C.HmacSHA256 = Hasher._createHmacHelper(SHA256);\n\t}(Math));\n\n\n\treturn CryptoJS.SHA256;\n\n}));","var DES = require('browserify-des')\nvar aes = require('browserify-aes/browser')\nvar aesModes = require('browserify-aes/modes')\nvar desModes = require('browserify-des/modes')\nvar ebtk = require('evp_bytestokey')\n\nfunction createCipher (suite, password) {\n  suite = suite.toLowerCase()\n\n  var keyLen, ivLen\n  if (aesModes[suite]) {\n    keyLen = aesModes[suite].key\n    ivLen = aesModes[suite].iv\n  } else if (desModes[suite]) {\n    keyLen = desModes[suite].key * 8\n    ivLen = desModes[suite].iv\n  } else {\n    throw new TypeError('invalid suite type')\n  }\n\n  var keys = ebtk(password, false, keyLen, ivLen)\n  return createCipheriv(suite, keys.key, keys.iv)\n}\n\nfunction createDecipher (suite, password) {\n  suite = suite.toLowerCase()\n\n  var keyLen, ivLen\n  if (aesModes[suite]) {\n    keyLen = aesModes[suite].key\n    ivLen = aesModes[suite].iv\n  } else if (desModes[suite]) {\n    keyLen = desModes[suite].key * 8\n    ivLen = desModes[suite].iv\n  } else {\n    throw new TypeError('invalid suite type')\n  }\n\n  var keys = ebtk(password, false, keyLen, ivLen)\n  return createDecipheriv(suite, keys.key, keys.iv)\n}\n\nfunction createCipheriv (suite, key, iv) {\n  suite = suite.toLowerCase()\n  if (aesModes[suite]) return aes.createCipheriv(suite, key, iv)\n  if (desModes[suite]) return new DES({ key: key, iv: iv, mode: suite })\n\n  throw new TypeError('invalid suite type')\n}\n\nfunction createDecipheriv (suite, key, iv) {\n  suite = suite.toLowerCase()\n  if (aesModes[suite]) return aes.createDecipheriv(suite, key, iv)\n  if (desModes[suite]) return new DES({ key: key, iv: iv, mode: suite, decrypt: true })\n\n  throw new TypeError('invalid suite type')\n}\n\nfunction getCiphers () {\n  return Object.keys(desModes).concat(aes.getCiphers())\n}\n\nexports.createCipher = exports.Cipher = createCipher\nexports.createCipheriv = exports.Cipheriv = createCipheriv\nexports.createDecipher = exports.Decipher = createDecipher\nexports.createDecipheriv = exports.Decipheriv = createDecipheriv\nexports.listCiphers = exports.getCiphers = getCiphers\n","'use strict';\n\nif (typeof process === 'undefined' ||\n    !process.version ||\n    process.version.indexOf('v0.') === 0 ||\n    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {\n  module.exports = { nextTick: nextTick };\n} else {\n  module.exports = process\n}\n\nfunction nextTick(fn, arg1, arg2, arg3) {\n  if (typeof fn !== 'function') {\n    throw new TypeError('\"callback\" argument must be a function');\n  }\n  var len = arguments.length;\n  var args, i;\n  switch (len) {\n  case 0:\n  case 1:\n    return process.nextTick(fn);\n  case 2:\n    return process.nextTick(function afterTickOne() {\n      fn.call(null, arg1);\n    });\n  case 3:\n    return process.nextTick(function afterTickTwo() {\n      fn.call(null, arg1, arg2);\n    });\n  case 4:\n    return process.nextTick(function afterTickThree() {\n      fn.call(null, arg1, arg2, arg3);\n    });\n  default:\n    args = new Array(len - 1);\n    i = 0;\n    while (i < args.length) {\n      args[i++] = arguments[i];\n    }\n    return process.nextTick(function afterTick() {\n      fn.apply(null, args);\n    });\n  }\n}\n\n","'use strict';\n\nfunction ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }\n\nfunction _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }\n\nfunction _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\nfunction _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\nvar _require = require('buffer'),\n    Buffer = _require.Buffer;\n\nvar _require2 = require('util'),\n    inspect = _require2.inspect;\n\nvar custom = inspect && inspect.custom || 'inspect';\n\nfunction copyBuffer(src, target, offset) {\n  Buffer.prototype.copy.call(src, target, offset);\n}\n\nmodule.exports =\n/*#__PURE__*/\nfunction () {\n  function BufferList() {\n    _classCallCheck(this, BufferList);\n\n    this.head = null;\n    this.tail = null;\n    this.length = 0;\n  }\n\n  _createClass(BufferList, [{\n    key: \"push\",\n    value: function push(v) {\n      var entry = {\n        data: v,\n        next: null\n      };\n      if (this.length > 0) this.tail.next = entry;else this.head = entry;\n      this.tail = entry;\n      ++this.length;\n    }\n  }, {\n    key: \"unshift\",\n    value: function unshift(v) {\n      var entry = {\n        data: v,\n        next: this.head\n      };\n      if (this.length === 0) this.tail = entry;\n      this.head = entry;\n      ++this.length;\n    }\n  }, {\n    key: \"shift\",\n    value: function shift() {\n      if (this.length === 0) return;\n      var ret = this.head.data;\n      if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;\n      --this.length;\n      return ret;\n    }\n  }, {\n    key: \"clear\",\n    value: function clear() {\n      this.head = this.tail = null;\n      this.length = 0;\n    }\n  }, {\n    key: \"join\",\n    value: function join(s) {\n      if (this.length === 0) return '';\n      var p = this.head;\n      var ret = '' + p.data;\n\n      while (p = p.next) {\n        ret += s + p.data;\n      }\n\n      return ret;\n    }\n  }, {\n    key: \"concat\",\n    value: function concat(n) {\n      if (this.length === 0) return Buffer.alloc(0);\n      var ret = Buffer.allocUnsafe(n >>> 0);\n      var p = this.head;\n      var i = 0;\n\n      while (p) {\n        copyBuffer(p.data, ret, i);\n        i += p.data.length;\n        p = p.next;\n      }\n\n      return ret;\n    } // Consumes a specified amount of bytes or characters from the buffered data.\n\n  }, {\n    key: \"consume\",\n    value: function consume(n, hasStrings) {\n      var ret;\n\n      if (n < this.head.data.length) {\n        // `slice` is the same for buffers and strings.\n        ret = this.head.data.slice(0, n);\n        this.head.data = this.head.data.slice(n);\n      } else if (n === this.head.data.length) {\n        // First chunk is a perfect match.\n        ret = this.shift();\n      } else {\n        // Result spans more than one buffer.\n        ret = hasStrings ? this._getString(n) : this._getBuffer(n);\n      }\n\n      return ret;\n    }\n  }, {\n    key: \"first\",\n    value: function first() {\n      return this.head.data;\n    } // Consumes a specified amount of characters from the buffered data.\n\n  }, {\n    key: \"_getString\",\n    value: function _getString(n) {\n      var p = this.head;\n      var c = 1;\n      var ret = p.data;\n      n -= ret.length;\n\n      while (p = p.next) {\n        var str = p.data;\n        var nb = n > str.length ? str.length : n;\n        if (nb === str.length) ret += str;else ret += str.slice(0, n);\n        n -= nb;\n\n        if (n === 0) {\n          if (nb === str.length) {\n            ++c;\n            if (p.next) this.head = p.next;else this.head = this.tail = null;\n          } else {\n            this.head = p;\n            p.data = str.slice(nb);\n          }\n\n          break;\n        }\n\n        ++c;\n      }\n\n      this.length -= c;\n      return ret;\n    } // Consumes a specified amount of bytes from the buffered data.\n\n  }, {\n    key: \"_getBuffer\",\n    value: function _getBuffer(n) {\n      var ret = Buffer.allocUnsafe(n);\n      var p = this.head;\n      var c = 1;\n      p.data.copy(ret);\n      n -= p.data.length;\n\n      while (p = p.next) {\n        var buf = p.data;\n        var nb = n > buf.length ? buf.length : n;\n        buf.copy(ret, ret.length - n, 0, nb);\n        n -= nb;\n\n        if (n === 0) {\n          if (nb === buf.length) {\n            ++c;\n            if (p.next) this.head = p.next;else this.head = this.tail = null;\n          } else {\n            this.head = p;\n            p.data = buf.slice(nb);\n          }\n\n          break;\n        }\n\n        ++c;\n      }\n\n      this.length -= c;\n      return ret;\n    } // Make sure the linked list only shows the minimal necessary information.\n\n  }, {\n    key: custom,\n    value: function value(_, options) {\n      return inspect(this, _objectSpread({}, options, {\n        // Only inspect one level.\n        depth: 0,\n        // It should not recurse.\n        customInspect: false\n      }));\n    }\n  }]);\n\n  return BufferList;\n}();","/**\n * mux.js\n *\n * Copyright (c) 2016 Brightcove\n * All rights reserved.\n *\n * Accepts program elementary stream (PES) data events and corrects\n * decode and presentation time stamps to account for a rollover\n * of the 33 bit value.\n */\n\n'use strict';\n\nvar Stream = require('../utils/stream');\n\nvar MAX_TS = 8589934592;\n\nvar RO_THRESH = 4294967296;\n\nvar handleRollover = function(value, reference) {\n  var direction = 1;\n\n  if (value > reference) {\n    // If the current timestamp value is greater than our reference timestamp and we detect a\n    // timestamp rollover, this means the roll over is happening in the opposite direction.\n    // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n    // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n    // rollover point. In loading this segment, the timestamp values will be very large,\n    // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n    // the time stamp to be `value - 2^33`.\n    direction = -1;\n  }\n\n  // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n  // cause an incorrect adjustment.\n  while (Math.abs(reference - value) > RO_THRESH) {\n    value += (direction * MAX_TS);\n  }\n\n  return value;\n};\n\nvar TimestampRolloverStream = function(type) {\n  var lastDTS, referenceDTS;\n\n  TimestampRolloverStream.prototype.init.call(this);\n\n  this.type_ = type;\n\n  this.push = function(data) {\n    if (data.type !== this.type_) {\n      return;\n    }\n\n    if (referenceDTS === undefined) {\n      referenceDTS = data.dts;\n    }\n\n    data.dts = handleRollover(data.dts, referenceDTS);\n    data.pts = handleRollover(data.pts, referenceDTS);\n\n    lastDTS = data.dts;\n\n    this.trigger('data', data);\n  };\n\n  this.flush = function() {\n    referenceDTS = lastDTS;\n    this.trigger('done');\n  };\n\n  this.discontinuity = function() {\n    referenceDTS = void 0;\n    lastDTS = void 0;\n  };\n\n};\n\nTimestampRolloverStream.prototype = new Stream();\n\nmodule.exports = {\n  TimestampRolloverStream: TimestampRolloverStream,\n  handleRollover: handleRollover\n};\n","/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nvar runtime = (function (exports) {\n  \"use strict\";\n\n  var Op = Object.prototype;\n  var hasOwn = Op.hasOwnProperty;\n  var undefined; // More compressible than void 0.\n  var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n  var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n  var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n  var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n  function define(obj, key, value) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n    return obj[key];\n  }\n  try {\n    // IE 8 has a broken Object.defineProperty that only works on DOM objects.\n    define({}, \"\");\n  } catch (err) {\n    define = function(obj, key, value) {\n      return obj[key] = value;\n    };\n  }\n\n  function wrap(innerFn, outerFn, self, tryLocsList) {\n    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n    var generator = Object.create(protoGenerator.prototype);\n    var context = new Context(tryLocsList || []);\n\n    // The ._invoke method unifies the implementations of the .next,\n    // .throw, and .return methods.\n    generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n    return generator;\n  }\n  exports.wrap = wrap;\n\n  // Try/catch helper to minimize deoptimizations. Returns a completion\n  // record like context.tryEntries[i].completion. This interface could\n  // have been (and was previously) designed to take a closure to be\n  // invoked without arguments, but in all the cases we care about we\n  // already have an existing method we want to call, so there's no need\n  // to create a new function object. We can even get away with assuming\n  // the method takes exactly one argument, since that happens to be true\n  // in every case, so we don't have to touch the arguments object. The\n  // only additional allocation required is the completion record, which\n  // has a stable shape and so hopefully should be cheap to allocate.\n  function tryCatch(fn, obj, arg) {\n    try {\n      return { type: \"normal\", arg: fn.call(obj, arg) };\n    } catch (err) {\n      return { type: \"throw\", arg: err };\n    }\n  }\n\n  var GenStateSuspendedStart = \"suspendedStart\";\n  var GenStateSuspendedYield = \"suspendedYield\";\n  var GenStateExecuting = \"executing\";\n  var GenStateCompleted = \"completed\";\n\n  // Returning this object from the innerFn has the same effect as\n  // breaking out of the dispatch switch statement.\n  var ContinueSentinel = {};\n\n  // Dummy constructor functions that we use as the .constructor and\n  // .constructor.prototype properties for functions that return Generator\n  // objects. For full spec compliance, you may wish to configure your\n  // minifier not to mangle the names of these two functions.\n  function Generator() {}\n  function GeneratorFunction() {}\n  function GeneratorFunctionPrototype() {}\n\n  // This is a polyfill for %IteratorPrototype% for environments that\n  // don't natively support it.\n  var IteratorPrototype = {};\n  IteratorPrototype[iteratorSymbol] = function () {\n    return this;\n  };\n\n  var getProto = Object.getPrototypeOf;\n  var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n  if (NativeIteratorPrototype &&\n      NativeIteratorPrototype !== Op &&\n      hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n    // This environment has a native %IteratorPrototype%; use it instead\n    // of the polyfill.\n    IteratorPrototype = NativeIteratorPrototype;\n  }\n\n  var Gp = GeneratorFunctionPrototype.prototype =\n    Generator.prototype = Object.create(IteratorPrototype);\n  GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n  GeneratorFunctionPrototype.constructor = GeneratorFunction;\n  GeneratorFunction.displayName = define(\n    GeneratorFunctionPrototype,\n    toStringTagSymbol,\n    \"GeneratorFunction\"\n  );\n\n  // Helper for defining the .next, .throw, and .return methods of the\n  // Iterator interface in terms of a single ._invoke method.\n  function defineIteratorMethods(prototype) {\n    [\"next\", \"throw\", \"return\"].forEach(function(method) {\n      define(prototype, method, function(arg) {\n        return this._invoke(method, arg);\n      });\n    });\n  }\n\n  exports.isGeneratorFunction = function(genFun) {\n    var ctor = typeof genFun === \"function\" && genFun.constructor;\n    return ctor\n      ? ctor === GeneratorFunction ||\n        // For the native GeneratorFunction constructor, the best we can\n        // do is to check its .name property.\n        (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n      : false;\n  };\n\n  exports.mark = function(genFun) {\n    if (Object.setPrototypeOf) {\n      Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n    } else {\n      genFun.__proto__ = GeneratorFunctionPrototype;\n      define(genFun, toStringTagSymbol, \"GeneratorFunction\");\n    }\n    genFun.prototype = Object.create(Gp);\n    return genFun;\n  };\n\n  // Within the body of any async function, `await x` is transformed to\n  // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n  // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n  // meant to be awaited.\n  exports.awrap = function(arg) {\n    return { __await: arg };\n  };\n\n  function AsyncIterator(generator, PromiseImpl) {\n    function invoke(method, arg, resolve, reject) {\n      var record = tryCatch(generator[method], generator, arg);\n      if (record.type === \"throw\") {\n        reject(record.arg);\n      } else {\n        var result = record.arg;\n        var value = result.value;\n        if (value &&\n            typeof value === \"object\" &&\n            hasOwn.call(value, \"__await\")) {\n          return PromiseImpl.resolve(value.__await).then(function(value) {\n            invoke(\"next\", value, resolve, reject);\n          }, function(err) {\n            invoke(\"throw\", err, resolve, reject);\n          });\n        }\n\n        return PromiseImpl.resolve(value).then(function(unwrapped) {\n          // When a yielded Promise is resolved, its final value becomes\n          // the .value of the Promise<{value,done}> result for the\n          // current iteration.\n          result.value = unwrapped;\n          resolve(result);\n        }, function(error) {\n          // If a rejected Promise was yielded, throw the rejection back\n          // into the async generator function so it can be handled there.\n          return invoke(\"throw\", error, resolve, reject);\n        });\n      }\n    }\n\n    var previousPromise;\n\n    function enqueue(method, arg) {\n      function callInvokeWithMethodAndArg() {\n        return new PromiseImpl(function(resolve, reject) {\n          invoke(method, arg, resolve, reject);\n        });\n      }\n\n      return previousPromise =\n        // If enqueue has been called before, then we want to wait until\n        // all previous Promises have been resolved before calling invoke,\n        // so that results are always delivered in the correct order. If\n        // enqueue has not been called before, then it is important to\n        // call invoke immediately, without waiting on a callback to fire,\n        // so that the async generator function has the opportunity to do\n        // any necessary setup in a predictable way. This predictability\n        // is why the Promise constructor synchronously invokes its\n        // executor callback, and why async functions synchronously\n        // execute code before the first await. Since we implement simple\n        // async functions in terms of async generators, it is especially\n        // important to get this right, even though it requires care.\n        previousPromise ? previousPromise.then(\n          callInvokeWithMethodAndArg,\n          // Avoid propagating failures to Promises returned by later\n          // invocations of the iterator.\n          callInvokeWithMethodAndArg\n        ) : callInvokeWithMethodAndArg();\n    }\n\n    // Define the unified helper method that is used to implement .next,\n    // .throw, and .return (see defineIteratorMethods).\n    this._invoke = enqueue;\n  }\n\n  defineIteratorMethods(AsyncIterator.prototype);\n  AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n    return this;\n  };\n  exports.AsyncIterator = AsyncIterator;\n\n  // Note that simple async functions are implemented on top of\n  // AsyncIterator objects; they just return a Promise for the value of\n  // the final result produced by the iterator.\n  exports.async = function(innerFn, outerFn, self, tryLocsList, PromiseImpl) {\n    if (PromiseImpl === void 0) PromiseImpl = Promise;\n\n    var iter = new AsyncIterator(\n      wrap(innerFn, outerFn, self, tryLocsList),\n      PromiseImpl\n    );\n\n    return exports.isGeneratorFunction(outerFn)\n      ? iter // If outerFn is a generator, return the full iterator.\n      : iter.next().then(function(result) {\n          return result.done ? result.value : iter.next();\n        });\n  };\n\n  function makeInvokeMethod(innerFn, self, context) {\n    var state = GenStateSuspendedStart;\n\n    return function invoke(method, arg) {\n      if (state === GenStateExecuting) {\n        throw new Error(\"Generator is already running\");\n      }\n\n      if (state === GenStateCompleted) {\n        if (method === \"throw\") {\n          throw arg;\n        }\n\n        // Be forgiving, per 25.3.3.3.3 of the spec:\n        // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n        return doneResult();\n      }\n\n      context.method = method;\n      context.arg = arg;\n\n      while (true) {\n        var delegate = context.delegate;\n        if (delegate) {\n          var delegateResult = maybeInvokeDelegate(delegate, context);\n          if (delegateResult) {\n            if (delegateResult === ContinueSentinel) continue;\n            return delegateResult;\n          }\n        }\n\n        if (context.method === \"next\") {\n          // Setting context._sent for legacy support of Babel's\n          // function.sent implementation.\n          context.sent = context._sent = context.arg;\n\n        } else if (context.method === \"throw\") {\n          if (state === GenStateSuspendedStart) {\n            state = GenStateCompleted;\n            throw context.arg;\n          }\n\n          context.dispatchException(context.arg);\n\n        } else if (context.method === \"return\") {\n          context.abrupt(\"return\", context.arg);\n        }\n\n        state = GenStateExecuting;\n\n        var record = tryCatch(innerFn, self, context);\n        if (record.type === \"normal\") {\n          // If an exception is thrown from innerFn, we leave state ===\n          // GenStateExecuting and loop back for another invocation.\n          state = context.done\n            ? GenStateCompleted\n            : GenStateSuspendedYield;\n\n          if (record.arg === ContinueSentinel) {\n            continue;\n          }\n\n          return {\n            value: record.arg,\n            done: context.done\n          };\n\n        } else if (record.type === \"throw\") {\n          state = GenStateCompleted;\n          // Dispatch the exception by looping back around to the\n          // context.dispatchException(context.arg) call above.\n          context.method = \"throw\";\n          context.arg = record.arg;\n        }\n      }\n    };\n  }\n\n  // Call delegate.iterator[context.method](context.arg) and handle the\n  // result, either by returning a { value, done } result from the\n  // delegate iterator, or by modifying context.method and context.arg,\n  // setting context.delegate to null, and returning the ContinueSentinel.\n  function maybeInvokeDelegate(delegate, context) {\n    var method = delegate.iterator[context.method];\n    if (method === undefined) {\n      // A .throw or .return when the delegate iterator has no .throw\n      // method always terminates the yield* loop.\n      context.delegate = null;\n\n      if (context.method === \"throw\") {\n        // Note: [\"return\"] must be used for ES3 parsing compatibility.\n        if (delegate.iterator[\"return\"]) {\n          // If the delegate iterator has a return method, give it a\n          // chance to clean up.\n          context.method = \"return\";\n          context.arg = undefined;\n          maybeInvokeDelegate(delegate, context);\n\n          if (context.method === \"throw\") {\n            // If maybeInvokeDelegate(context) changed context.method from\n            // \"return\" to \"throw\", let that override the TypeError below.\n            return ContinueSentinel;\n          }\n        }\n\n        context.method = \"throw\";\n        context.arg = new TypeError(\n          \"The iterator does not provide a 'throw' method\");\n      }\n\n      return ContinueSentinel;\n    }\n\n    var record = tryCatch(method, delegate.iterator, context.arg);\n\n    if (record.type === \"throw\") {\n      context.method = \"throw\";\n      context.arg = record.arg;\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    var info = record.arg;\n\n    if (! info) {\n      context.method = \"throw\";\n      context.arg = new TypeError(\"iterator result is not an object\");\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    if (info.done) {\n      // Assign the result of the finished delegate to the temporary\n      // variable specified by delegate.resultName (see delegateYield).\n      context[delegate.resultName] = info.value;\n\n      // Resume execution at the desired location (see delegateYield).\n      context.next = delegate.nextLoc;\n\n      // If context.method was \"throw\" but the delegate handled the\n      // exception, let the outer generator proceed normally. If\n      // context.method was \"next\", forget context.arg since it has been\n      // \"consumed\" by the delegate iterator. If context.method was\n      // \"return\", allow the original .return call to continue in the\n      // outer generator.\n      if (context.method !== \"return\") {\n        context.method = \"next\";\n        context.arg = undefined;\n      }\n\n    } else {\n      // Re-yield the result returned by the delegate method.\n      return info;\n    }\n\n    // The delegate iterator is finished, so forget it and continue with\n    // the outer generator.\n    context.delegate = null;\n    return ContinueSentinel;\n  }\n\n  // Define Generator.prototype.{next,throw,return} in terms of the\n  // unified ._invoke helper method.\n  defineIteratorMethods(Gp);\n\n  define(Gp, toStringTagSymbol, \"Generator\");\n\n  // A Generator should always return itself as the iterator object when the\n  // @@iterator function is called on it. Some browsers' implementations of the\n  // iterator prototype chain incorrectly implement this, causing the Generator\n  // object to not be returned from this call. This ensures that doesn't happen.\n  // See https://github.com/facebook/regenerator/issues/274 for more details.\n  Gp[iteratorSymbol] = function() {\n    return this;\n  };\n\n  Gp.toString = function() {\n    return \"[object Generator]\";\n  };\n\n  function pushTryEntry(locs) {\n    var entry = { tryLoc: locs[0] };\n\n    if (1 in locs) {\n      entry.catchLoc = locs[1];\n    }\n\n    if (2 in locs) {\n      entry.finallyLoc = locs[2];\n      entry.afterLoc = locs[3];\n    }\n\n    this.tryEntries.push(entry);\n  }\n\n  function resetTryEntry(entry) {\n    var record = entry.completion || {};\n    record.type = \"normal\";\n    delete record.arg;\n    entry.completion = record;\n  }\n\n  function Context(tryLocsList) {\n    // The root entry object (effectively a try statement without a catch\n    // or a finally block) gives us a place to store values thrown from\n    // locations where there is no enclosing try statement.\n    this.tryEntries = [{ tryLoc: \"root\" }];\n    tryLocsList.forEach(pushTryEntry, this);\n    this.reset(true);\n  }\n\n  exports.keys = function(object) {\n    var keys = [];\n    for (var key in object) {\n      keys.push(key);\n    }\n    keys.reverse();\n\n    // Rather than returning an object with a next method, we keep\n    // things simple and return the next function itself.\n    return function next() {\n      while (keys.length) {\n        var key = keys.pop();\n        if (key in object) {\n          next.value = key;\n          next.done = false;\n          return next;\n        }\n      }\n\n      // To avoid creating an additional object, we just hang the .value\n      // and .done properties off the next function object itself. This\n      // also ensures that the minifier will not anonymize the function.\n      next.done = true;\n      return next;\n    };\n  };\n\n  function values(iterable) {\n    if (iterable) {\n      var iteratorMethod = iterable[iteratorSymbol];\n      if (iteratorMethod) {\n        return iteratorMethod.call(iterable);\n      }\n\n      if (typeof iterable.next === \"function\") {\n        return iterable;\n      }\n\n      if (!isNaN(iterable.length)) {\n        var i = -1, next = function next() {\n          while (++i < iterable.length) {\n            if (hasOwn.call(iterable, i)) {\n              next.value = iterable[i];\n              next.done = false;\n              return next;\n            }\n          }\n\n          next.value = undefined;\n          next.done = true;\n\n          return next;\n        };\n\n        return next.next = next;\n      }\n    }\n\n    // Return an iterator with no values.\n    return { next: doneResult };\n  }\n  exports.values = values;\n\n  function doneResult() {\n    return { value: undefined, done: true };\n  }\n\n  Context.prototype = {\n    constructor: Context,\n\n    reset: function(skipTempReset) {\n      this.prev = 0;\n      this.next = 0;\n      // Resetting context._sent for legacy support of Babel's\n      // function.sent implementation.\n      this.sent = this._sent = undefined;\n      this.done = false;\n      this.delegate = null;\n\n      this.method = \"next\";\n      this.arg = undefined;\n\n      this.tryEntries.forEach(resetTryEntry);\n\n      if (!skipTempReset) {\n        for (var name in this) {\n          // Not sure about the optimal order of these conditions:\n          if (name.charAt(0) === \"t\" &&\n              hasOwn.call(this, name) &&\n              !isNaN(+name.slice(1))) {\n            this[name] = undefined;\n          }\n        }\n      }\n    },\n\n    stop: function() {\n      this.done = true;\n\n      var rootEntry = this.tryEntries[0];\n      var rootRecord = rootEntry.completion;\n      if (rootRecord.type === \"throw\") {\n        throw rootRecord.arg;\n      }\n\n      return this.rval;\n    },\n\n    dispatchException: function(exception) {\n      if (this.done) {\n        throw exception;\n      }\n\n      var context = this;\n      function handle(loc, caught) {\n        record.type = \"throw\";\n        record.arg = exception;\n        context.next = loc;\n\n        if (caught) {\n          // If the dispatched exception was caught by a catch block,\n          // then let that catch block handle the exception normally.\n          context.method = \"next\";\n          context.arg = undefined;\n        }\n\n        return !! caught;\n      }\n\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        var record = entry.completion;\n\n        if (entry.tryLoc === \"root\") {\n          // Exception thrown outside of any try block that could handle\n          // it, so set the completion value of the entire function to\n          // throw the exception.\n          return handle(\"end\");\n        }\n\n        if (entry.tryLoc <= this.prev) {\n          var hasCatch = hasOwn.call(entry, \"catchLoc\");\n          var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n          if (hasCatch && hasFinally) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            } else if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else if (hasCatch) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            }\n\n          } else if (hasFinally) {\n            if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else {\n            throw new Error(\"try statement without catch or finally\");\n          }\n        }\n      }\n    },\n\n    abrupt: function(type, arg) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc <= this.prev &&\n            hasOwn.call(entry, \"finallyLoc\") &&\n            this.prev < entry.finallyLoc) {\n          var finallyEntry = entry;\n          break;\n        }\n      }\n\n      if (finallyEntry &&\n          (type === \"break\" ||\n           type === \"continue\") &&\n          finallyEntry.tryLoc <= arg &&\n          arg <= finallyEntry.finallyLoc) {\n        // Ignore the finally entry if control is not jumping to a\n        // location outside the try/catch block.\n        finallyEntry = null;\n      }\n\n      var record = finallyEntry ? finallyEntry.completion : {};\n      record.type = type;\n      record.arg = arg;\n\n      if (finallyEntry) {\n        this.method = \"next\";\n        this.next = finallyEntry.finallyLoc;\n        return ContinueSentinel;\n      }\n\n      return this.complete(record);\n    },\n\n    complete: function(record, afterLoc) {\n      if (record.type === \"throw\") {\n        throw record.arg;\n      }\n\n      if (record.type === \"break\" ||\n          record.type === \"continue\") {\n        this.next = record.arg;\n      } else if (record.type === \"return\") {\n        this.rval = this.arg = record.arg;\n        this.method = \"return\";\n        this.next = \"end\";\n      } else if (record.type === \"normal\" && afterLoc) {\n        this.next = afterLoc;\n      }\n\n      return ContinueSentinel;\n    },\n\n    finish: function(finallyLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.finallyLoc === finallyLoc) {\n          this.complete(entry.completion, entry.afterLoc);\n          resetTryEntry(entry);\n          return ContinueSentinel;\n        }\n      }\n    },\n\n    \"catch\": function(tryLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc === tryLoc) {\n          var record = entry.completion;\n          if (record.type === \"throw\") {\n            var thrown = record.arg;\n            resetTryEntry(entry);\n          }\n          return thrown;\n        }\n      }\n\n      // The context.catch method must only be called with a location\n      // argument that corresponds to a known catch block.\n      throw new Error(\"illegal catch attempt\");\n    },\n\n    delegateYield: function(iterable, resultName, nextLoc) {\n      this.delegate = {\n        iterator: values(iterable),\n        resultName: resultName,\n        nextLoc: nextLoc\n      };\n\n      if (this.method === \"next\") {\n        // Deliberately forget the last sent value so that we don't\n        // accidentally pass it on to the delegate.\n        this.arg = undefined;\n      }\n\n      return ContinueSentinel;\n    }\n  };\n\n  // Regardless of whether this script is executing as a CommonJS module\n  // or not, return the runtime object so that we can declare the variable\n  // regeneratorRuntime in the outer scope, which allows this module to be\n  // injected easily by `bin/regenerator --include-runtime script.js`.\n  return exports;\n\n}(\n  // If this script is executing as a CommonJS module, use module.exports\n  // as the regeneratorRuntime namespace. Otherwise create a new empty\n  // object. Either way, the resulting object will be used to initialize\n  // the regeneratorRuntime variable at the top of this file.\n  typeof module === \"object\" ? module.exports : {}\n));\n\ntry {\n  regeneratorRuntime = runtime;\n} catch (accidentalStrictMode) {\n  // This module should not be running in strict mode, so the above\n  // assignment should always work unless something is misconfigured. Just\n  // in case runtime.js accidentally runs in strict mode, we can escape\n  // strict mode using a global Function call. This could conceivably fail\n  // if a Content Security Policy forbids using Function, but in that case\n  // the proper solution is to fix the accidental strict mode problem. If\n  // you've misconfigured your bundler to force strict mode and applied a\n  // CSP to forbid Function, and you're not willing to fix either of those\n  // problems, please detail your unique predicament in a GitHub issue.\n  Function(\"r\", \"regeneratorRuntime = r\")(runtime);\n}\n","// much of this based on https://github.com/indutny/self-signed/blob/gh-pages/lib/rsa.js\nvar Buffer = require('safe-buffer').Buffer\nvar BN = require('bn.js')\nvar EC = require('elliptic').ec\nvar parseKeys = require('parse-asn1')\nvar curves = require('./curves.json')\n\nfunction verify (sig, hash, key, signType, tag) {\n  var pub = parseKeys(key)\n  if (pub.type === 'ec') {\n    // rsa keys can be interpreted as ecdsa ones in openssl\n    if (signType !== 'ecdsa' && signType !== 'ecdsa/rsa') throw new Error('wrong public key type')\n    return ecVerify(sig, hash, pub)\n  } else if (pub.type === 'dsa') {\n    if (signType !== 'dsa') throw new Error('wrong public key type')\n    return dsaVerify(sig, hash, pub)\n  } else {\n    if (signType !== 'rsa' && signType !== 'ecdsa/rsa') throw new Error('wrong public key type')\n  }\n  hash = Buffer.concat([tag, hash])\n  var len = pub.modulus.byteLength()\n  var pad = [1]\n  var padNum = 0\n  while (hash.length + pad.length + 2 < len) {\n    pad.push(0xff)\n    padNum++\n  }\n  pad.push(0x00)\n  var i = -1\n  while (++i < hash.length) {\n    pad.push(hash[i])\n  }\n  pad = Buffer.from(pad)\n  var red = BN.mont(pub.modulus)\n  sig = new BN(sig).toRed(red)\n\n  sig = sig.redPow(new BN(pub.publicExponent))\n  sig = Buffer.from(sig.fromRed().toArray())\n  var out = padNum < 8 ? 1 : 0\n  len = Math.min(sig.length, pad.length)\n  if (sig.length !== pad.length) out = 1\n\n  i = -1\n  while (++i < len) out |= sig[i] ^ pad[i]\n  return out === 0\n}\n\nfunction ecVerify (sig, hash, pub) {\n  var curveId = curves[pub.data.algorithm.curve.join('.')]\n  if (!curveId) throw new Error('unknown curve ' + pub.data.algorithm.curve.join('.'))\n\n  var curve = new EC(curveId)\n  var pubkey = pub.data.subjectPrivateKey.data\n\n  return curve.verify(hash, sig, pubkey)\n}\n\nfunction dsaVerify (sig, hash, pub) {\n  var p = pub.data.p\n  var q = pub.data.q\n  var g = pub.data.g\n  var y = pub.data.pub_key\n  var unpacked = parseKeys.signature.decode(sig, 'der')\n  var s = unpacked.s\n  var r = unpacked.r\n  checkValue(s, q)\n  checkValue(r, q)\n  var montp = BN.mont(p)\n  var w = s.invm(q)\n  var v = g.toRed(montp)\n    .redPow(new BN(hash).mul(w).mod(q))\n    .fromRed()\n    .mul(y.toRed(montp).redPow(r.mul(w).mod(q)).fromRed())\n    .mod(p)\n    .mod(q)\n  return v.cmp(r) === 0\n}\n\nfunction checkValue (b, q) {\n  if (b.cmpn(0) <= 0) throw new Error('invalid sig')\n  if (b.cmp(q) >= q) throw new Error('invalid sig')\n}\n\nmodule.exports = verify\n","import getBasePlacement from \"../utils/getBasePlacement.js\";\nimport { top, left, right, placements } from \"../enums.js\"; // eslint-disable-next-line import/no-unused-modules\n\nexport function distanceAndSkiddingToXY(placement, rects, offset) {\n  var basePlacement = getBasePlacement(placement);\n  var invertDistance = [left, top].indexOf(basePlacement) >= 0 ? -1 : 1;\n\n  var _ref = typeof offset === 'function' ? offset(Object.assign({}, rects, {\n    placement: placement\n  })) : offset,\n      skidding = _ref[0],\n      distance = _ref[1];\n\n  skidding = skidding || 0;\n  distance = (distance || 0) * invertDistance;\n  return [left, right].indexOf(basePlacement) >= 0 ? {\n    x: distance,\n    y: skidding\n  } : {\n    x: skidding,\n    y: distance\n  };\n}\n\nfunction offset(_ref2) {\n  var state = _ref2.state,\n      options = _ref2.options,\n      name = _ref2.name;\n  var _options$offset = options.offset,\n      offset = _options$offset === void 0 ? [0, 0] : _options$offset;\n  var data = placements.reduce(function (acc, placement) {\n    acc[placement] = distanceAndSkiddingToXY(placement, state.rects, offset);\n    return acc;\n  }, {});\n  var _data$state$placement = data[state.placement],\n      x = _data$state$placement.x,\n      y = _data$state$placement.y;\n\n  if (state.modifiersData.popperOffsets != null) {\n    state.modifiersData.popperOffsets.x += x;\n    state.modifiersData.popperOffsets.y += y;\n  }\n\n  state.modifiersData[name] = data;\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'offset',\n  enabled: true,\n  phase: 'main',\n  requires: ['popperOffsets'],\n  fn: offset\n};","export default function expandToHashMap(value, keys) {\n  return keys.reduce(function (hashMap, key) {\n    hashMap[key] = value;\n    return hashMap;\n  }, {});\n}","'use strict';\n// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`\nrequire('../modules/es.array.iterator');\nvar $ = require('../internals/export');\nvar getBuiltIn = require('../internals/get-built-in');\nvar USE_NATIVE_URL = require('../internals/native-url');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar createIteratorConstructor = require('../internals/create-iterator-constructor');\nvar InternalStateModule = require('../internals/internal-state');\nvar anInstance = require('../internals/an-instance');\nvar hasOwn = require('../internals/has');\nvar bind = require('../internals/function-bind-context');\nvar classof = require('../internals/classof');\nvar anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar getIterator = require('../internals/get-iterator');\nvar getIteratorMethod = require('../internals/get-iterator-method');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar $fetch = getBuiltIn('fetch');\nvar Headers = getBuiltIn('Headers');\nvar ITERATOR = wellKnownSymbol('iterator');\nvar URL_SEARCH_PARAMS = 'URLSearchParams';\nvar URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalParamsState = InternalStateModule.getterFor(URL_SEARCH_PARAMS);\nvar getInternalIteratorState = InternalStateModule.getterFor(URL_SEARCH_PARAMS_ITERATOR);\n\nvar plus = /\\+/g;\nvar sequences = Array(4);\n\nvar percentSequence = function (bytes) {\n  return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\\\da-f]{2}){' + bytes + '})', 'gi'));\n};\n\nvar percentDecode = function (sequence) {\n  try {\n    return decodeURIComponent(sequence);\n  } catch (error) {\n    return sequence;\n  }\n};\n\nvar deserialize = function (it) {\n  var result = it.replace(plus, ' ');\n  var bytes = 4;\n  try {\n    return decodeURIComponent(result);\n  } catch (error) {\n    while (bytes) {\n      result = result.replace(percentSequence(bytes--), percentDecode);\n    }\n    return result;\n  }\n};\n\nvar find = /[!'()~]|%20/g;\n\nvar replace = {\n  '!': '%21',\n  \"'\": '%27',\n  '(': '%28',\n  ')': '%29',\n  '~': '%7E',\n  '%20': '+'\n};\n\nvar replacer = function (match) {\n  return replace[match];\n};\n\nvar serialize = function (it) {\n  return encodeURIComponent(it).replace(find, replacer);\n};\n\nvar parseSearchParams = function (result, query) {\n  if (query) {\n    var attributes = query.split('&');\n    var index = 0;\n    var attribute, entry;\n    while (index < attributes.length) {\n      attribute = attributes[index++];\n      if (attribute.length) {\n        entry = attribute.split('=');\n        result.push({\n          key: deserialize(entry.shift()),\n          value: deserialize(entry.join('='))\n        });\n      }\n    }\n  }\n};\n\nvar updateSearchParams = function (query) {\n  this.entries.length = 0;\n  parseSearchParams(this.entries, query);\n};\n\nvar validateArgumentsLength = function (passed, required) {\n  if (passed < required) throw TypeError('Not enough arguments');\n};\n\nvar URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {\n  setInternalState(this, {\n    type: URL_SEARCH_PARAMS_ITERATOR,\n    iterator: getIterator(getInternalParamsState(params).entries),\n    kind: kind\n  });\n}, 'Iterator', function next() {\n  var state = getInternalIteratorState(this);\n  var kind = state.kind;\n  var step = state.iterator.next();\n  var entry = step.value;\n  if (!step.done) {\n    step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];\n  } return step;\n});\n\n// `URLSearchParams` constructor\n// https://url.spec.whatwg.org/#interface-urlsearchparams\nvar URLSearchParamsConstructor = function URLSearchParams(/* init */) {\n  anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n  var init = arguments.length > 0 ? arguments[0] : undefined;\n  var that = this;\n  var entries = [];\n  var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;\n\n  setInternalState(that, {\n    type: URL_SEARCH_PARAMS,\n    entries: entries,\n    updateURL: function () { /* empty */ },\n    updateSearchParams: updateSearchParams\n  });\n\n  if (init !== undefined) {\n    if (isObject(init)) {\n      iteratorMethod = getIteratorMethod(init);\n      if (typeof iteratorMethod === 'function') {\n        iterator = iteratorMethod.call(init);\n        next = iterator.next;\n        while (!(step = next.call(iterator)).done) {\n          entryIterator = getIterator(anObject(step.value));\n          entryNext = entryIterator.next;\n          if (\n            (first = entryNext.call(entryIterator)).done ||\n            (second = entryNext.call(entryIterator)).done ||\n            !entryNext.call(entryIterator).done\n          ) throw TypeError('Expected sequence with length 2');\n          entries.push({ key: first.value + '', value: second.value + '' });\n        }\n      } else for (key in init) if (hasOwn(init, key)) entries.push({ key: key, value: init[key] + '' });\n    } else {\n      parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');\n    }\n  }\n};\n\nvar URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;\n\nredefineAll(URLSearchParamsPrototype, {\n  // `URLSearchParams.prototype.append` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-append\n  append: function append(name, value) {\n    validateArgumentsLength(arguments.length, 2);\n    var state = getInternalParamsState(this);\n    state.entries.push({ key: name + '', value: value + '' });\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.delete` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-delete\n  'delete': function (name) {\n    validateArgumentsLength(arguments.length, 1);\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    var key = name + '';\n    var index = 0;\n    while (index < entries.length) {\n      if (entries[index].key === key) entries.splice(index, 1);\n      else index++;\n    }\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.get` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-get\n  get: function get(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var index = 0;\n    for (; index < entries.length; index++) {\n      if (entries[index].key === key) return entries[index].value;\n    }\n    return null;\n  },\n  // `URLSearchParams.prototype.getAll` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-getall\n  getAll: function getAll(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var result = [];\n    var index = 0;\n    for (; index < entries.length; index++) {\n      if (entries[index].key === key) result.push(entries[index].value);\n    }\n    return result;\n  },\n  // `URLSearchParams.prototype.has` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-has\n  has: function has(name) {\n    validateArgumentsLength(arguments.length, 1);\n    var entries = getInternalParamsState(this).entries;\n    var key = name + '';\n    var index = 0;\n    while (index < entries.length) {\n      if (entries[index++].key === key) return true;\n    }\n    return false;\n  },\n  // `URLSearchParams.prototype.set` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-set\n  set: function set(name, value) {\n    validateArgumentsLength(arguments.length, 1);\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    var found = false;\n    var key = name + '';\n    var val = value + '';\n    var index = 0;\n    var entry;\n    for (; index < entries.length; index++) {\n      entry = entries[index];\n      if (entry.key === key) {\n        if (found) entries.splice(index--, 1);\n        else {\n          found = true;\n          entry.value = val;\n        }\n      }\n    }\n    if (!found) entries.push({ key: key, value: val });\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.sort` method\n  // https://url.spec.whatwg.org/#dom-urlsearchparams-sort\n  sort: function sort() {\n    var state = getInternalParamsState(this);\n    var entries = state.entries;\n    // Array#sort is not stable in some engines\n    var slice = entries.slice();\n    var entry, entriesIndex, sliceIndex;\n    entries.length = 0;\n    for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {\n      entry = slice[sliceIndex];\n      for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {\n        if (entries[entriesIndex].key > entry.key) {\n          entries.splice(entriesIndex, 0, entry);\n          break;\n        }\n      }\n      if (entriesIndex === sliceIndex) entries.push(entry);\n    }\n    state.updateURL();\n  },\n  // `URLSearchParams.prototype.forEach` method\n  forEach: function forEach(callback /* , thisArg */) {\n    var entries = getInternalParamsState(this).entries;\n    var boundFunction = bind(callback, arguments.length > 1 ? arguments[1] : undefined, 3);\n    var index = 0;\n    var entry;\n    while (index < entries.length) {\n      entry = entries[index++];\n      boundFunction(entry.value, entry.key, this);\n    }\n  },\n  // `URLSearchParams.prototype.keys` method\n  keys: function keys() {\n    return new URLSearchParamsIterator(this, 'keys');\n  },\n  // `URLSearchParams.prototype.values` method\n  values: function values() {\n    return new URLSearchParamsIterator(this, 'values');\n  },\n  // `URLSearchParams.prototype.entries` method\n  entries: function entries() {\n    return new URLSearchParamsIterator(this, 'entries');\n  }\n}, { enumerable: true });\n\n// `URLSearchParams.prototype[@@iterator]` method\nredefine(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);\n\n// `URLSearchParams.prototype.toString` method\n// https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior\nredefine(URLSearchParamsPrototype, 'toString', function toString() {\n  var entries = getInternalParamsState(this).entries;\n  var result = [];\n  var index = 0;\n  var entry;\n  while (index < entries.length) {\n    entry = entries[index++];\n    result.push(serialize(entry.key) + '=' + serialize(entry.value));\n  } return result.join('&');\n}, { enumerable: true });\n\nsetToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);\n\n$({ global: true, forced: !USE_NATIVE_URL }, {\n  URLSearchParams: URLSearchParamsConstructor\n});\n\n// Wrap `fetch` for correct work with polyfilled `URLSearchParams`\n// https://github.com/zloirock/core-js/issues/674\nif (!USE_NATIVE_URL && typeof $fetch == 'function' && typeof Headers == 'function') {\n  $({ global: true, enumerable: true, forced: true }, {\n    fetch: function fetch(input /* , init */) {\n      var args = [input];\n      var init, body, headers;\n      if (arguments.length > 1) {\n        init = arguments[1];\n        if (isObject(init)) {\n          body = init.body;\n          if (classof(body) === URL_SEARCH_PARAMS) {\n            headers = init.headers ? new Headers(init.headers) : new Headers();\n            if (!headers.has('content-type')) {\n              headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');\n            }\n            init = create(init, {\n              body: createPropertyDescriptor(0, String(body)),\n              headers: createPropertyDescriptor(0, headers)\n            });\n          }\n        }\n        args.push(init);\n      } return $fetch.apply(this, args);\n    }\n  });\n}\n\nmodule.exports = {\n  URLSearchParams: URLSearchParamsConstructor,\n  getState: getInternalParamsState\n};\n","'use strict'\nvar inherits = require('inherits')\nvar MD5 = require('md5.js')\nvar RIPEMD160 = require('ripemd160')\nvar sha = require('sha.js')\nvar Base = require('cipher-base')\n\nfunction Hash (hash) {\n  Base.call(this, 'digest')\n\n  this._hash = hash\n}\n\ninherits(Hash, Base)\n\nHash.prototype._update = function (data) {\n  this._hash.update(data)\n}\n\nHash.prototype._final = function () {\n  return this._hash.digest()\n}\n\nmodule.exports = function createHash (alg) {\n  alg = alg.toLowerCase()\n  if (alg === 'md5') return new MD5()\n  if (alg === 'rmd160' || alg === 'ripemd160') return new RIPEMD160()\n\n  return new Hash(sha(alg))\n}\n","'use strict';\nvar $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar createProperty = require('../internals/create-property');\nvar arraySpeciesCreate = require('../internals/array-species-create');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');\nvar MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;\nvar MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';\n\n// We can't use this feature detection in V8 since it causes\n// deoptimization and serious performance degradation\n// https://github.com/zloirock/core-js/issues/679\nvar IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails(function () {\n  var array = [];\n  array[IS_CONCAT_SPREADABLE] = false;\n  return array.concat()[0] !== array;\n});\n\nvar SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');\n\nvar isConcatSpreadable = function (O) {\n  if (!isObject(O)) return false;\n  var spreadable = O[IS_CONCAT_SPREADABLE];\n  return spreadable !== undefined ? !!spreadable : isArray(O);\n};\n\nvar FORCED = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;\n\n// `Array.prototype.concat` method\n// https://tc39.es/ecma262/#sec-array.prototype.concat\n// with adding support of @@isConcatSpreadable and @@species\n$({ target: 'Array', proto: true, forced: FORCED }, {\n  // eslint-disable-next-line no-unused-vars -- required for `.length`\n  concat: function concat(arg) {\n    var O = toObject(this);\n    var A = arraySpeciesCreate(O, 0);\n    var n = 0;\n    var i, k, length, len, E;\n    for (i = -1, length = arguments.length; i < length; i++) {\n      E = i === -1 ? O : arguments[i];\n      if (isConcatSpreadable(E)) {\n        len = toLength(E.length);\n        if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);\n        for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);\n      } else {\n        if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);\n        createProperty(A, n++, E);\n      }\n    }\n    A.length = n;\n    return A;\n  }\n});\n","var anObject = require('../internals/an-object');\nvar getIteratorMethod = require('../internals/get-iterator-method');\n\nmodule.exports = function (it) {\n  var iteratorMethod = getIteratorMethod(it);\n  if (typeof iteratorMethod != 'function') {\n    throw TypeError(String(it) + ' is not iterable');\n  } return anObject(iteratorMethod.call(it));\n};\n","var anObject = require('../internals/an-object');\nvar iteratorClose = require('../internals/iterator-close');\n\n// call something on iterator step with safe closing on error\nmodule.exports = function (iterator, fn, value, ENTRIES) {\n  try {\n    return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);\n  // 7.4.6 IteratorClose(iterator, completion)\n  } catch (error) {\n    iteratorClose(iterator);\n    throw error;\n  }\n};\n","var DESCRIPTORS = require('../internals/descriptors');\nvar IE8_DOM_DEFINE = require('../internals/ie8-dom-define');\nvar anObject = require('../internals/an-object');\nvar toPrimitive = require('../internals/to-primitive');\n\n// eslint-disable-next-line es/no-object-defineproperty -- safe\nvar $defineProperty = Object.defineProperty;\n\n// `Object.defineProperty` method\n// https://tc39.es/ecma262/#sec-object.defineproperty\nexports.f = DESCRIPTORS ? $defineProperty : function defineProperty(O, P, Attributes) {\n  anObject(O);\n  P = toPrimitive(P, true);\n  anObject(Attributes);\n  if (IE8_DOM_DEFINE) try {\n    return $defineProperty(O, P, Attributes);\n  } catch (error) { /* empty */ }\n  if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');\n  if ('value' in Attributes) O[P] = Attributes.value;\n  return O;\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// a passthrough stream.\n// basically just the most minimal sort of Transform stream.\n// Every written chunk gets output as-is.\n'use strict';\n\nmodule.exports = PassThrough;\n\nvar Transform = require('./_stream_transform');\n\nrequire('inherits')(PassThrough, Transform);\n\nfunction PassThrough(options) {\n  if (!(this instanceof PassThrough)) return new PassThrough(options);\n  Transform.call(this, options);\n}\n\nPassThrough.prototype._transform = function (chunk, encoding, cb) {\n  cb(null, chunk);\n};","'use strict';\n\nfunction _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }\n\nvar codes = {};\n\nfunction createErrorType(code, message, Base) {\n  if (!Base) {\n    Base = Error;\n  }\n\n  function getMessage(arg1, arg2, arg3) {\n    if (typeof message === 'string') {\n      return message;\n    } else {\n      return message(arg1, arg2, arg3);\n    }\n  }\n\n  var NodeError =\n  /*#__PURE__*/\n  function (_Base) {\n    _inheritsLoose(NodeError, _Base);\n\n    function NodeError(arg1, arg2, arg3) {\n      return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;\n    }\n\n    return NodeError;\n  }(Base);\n\n  NodeError.prototype.name = Base.name;\n  NodeError.prototype.code = code;\n  codes[code] = NodeError;\n} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js\n\n\nfunction oneOf(expected, thing) {\n  if (Array.isArray(expected)) {\n    var len = expected.length;\n    expected = expected.map(function (i) {\n      return String(i);\n    });\n\n    if (len > 2) {\n      return \"one of \".concat(thing, \" \").concat(expected.slice(0, len - 1).join(', '), \", or \") + expected[len - 1];\n    } else if (len === 2) {\n      return \"one of \".concat(thing, \" \").concat(expected[0], \" or \").concat(expected[1]);\n    } else {\n      return \"of \".concat(thing, \" \").concat(expected[0]);\n    }\n  } else {\n    return \"of \".concat(thing, \" \").concat(String(expected));\n  }\n} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith\n\n\nfunction startsWith(str, search, pos) {\n  return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;\n} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith\n\n\nfunction endsWith(str, search, this_len) {\n  if (this_len === undefined || this_len > str.length) {\n    this_len = str.length;\n  }\n\n  return str.substring(this_len - search.length, this_len) === search;\n} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes\n\n\nfunction includes(str, search, start) {\n  if (typeof start !== 'number') {\n    start = 0;\n  }\n\n  if (start + search.length > str.length) {\n    return false;\n  } else {\n    return str.indexOf(search, start) !== -1;\n  }\n}\n\ncreateErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {\n  return 'The value \"' + value + '\" is invalid for option \"' + name + '\"';\n}, TypeError);\ncreateErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {\n  // determiner: 'must be' or 'must not be'\n  var determiner;\n\n  if (typeof expected === 'string' && startsWith(expected, 'not ')) {\n    determiner = 'must not be';\n    expected = expected.replace(/^not /, '');\n  } else {\n    determiner = 'must be';\n  }\n\n  var msg;\n\n  if (endsWith(name, ' argument')) {\n    // For cases like 'first argument'\n    msg = \"The \".concat(name, \" \").concat(determiner, \" \").concat(oneOf(expected, 'type'));\n  } else {\n    var type = includes(name, '.') ? 'property' : 'argument';\n    msg = \"The \\\"\".concat(name, \"\\\" \").concat(type, \" \").concat(determiner, \" \").concat(oneOf(expected, 'type'));\n  }\n\n  msg += \". Received type \".concat(typeof actual);\n  return msg;\n}, TypeError);\ncreateErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');\ncreateErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {\n  return 'The ' + name + ' method is not implemented';\n});\ncreateErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');\ncreateErrorType('ERR_STREAM_DESTROYED', function (name) {\n  return 'Cannot call ' + name + ' after a stream was destroyed';\n});\ncreateErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');\ncreateErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');\ncreateErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');\ncreateErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);\ncreateErrorType('ERR_UNKNOWN_ENCODING', function (arg) {\n  return 'Unknown encoding: ' + arg;\n}, TypeError);\ncreateErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');\nmodule.exports.codes = codes;\n","/**\n * Accepts program elementary stream (PES) data events and parses out\n * ID3 metadata from them, if present.\n * @see http://id3.org/id3v2.3.0\n */\n'use strict';\nvar\n  Stream = require('../utils/stream'),\n  StreamTypes = require('./stream-types'),\n  // return a percent-encoded representation of the specified byte range\n  // @see http://en.wikipedia.org/wiki/Percent-encoding\n  percentEncode = function(bytes, start, end) {\n    var i, result = '';\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n    return result;\n  },\n  // return the string representation of the specified byte range,\n  // interpreted as UTf-8.\n  parseUtf8 = function(bytes, start, end) {\n    return decodeURIComponent(percentEncode(bytes, start, end));\n  },\n  // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n  parseIso88591 = function(bytes, start, end) {\n    return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n  },\n  parseSyncSafeInteger = function(data) {\n    return (data[0] << 21) |\n            (data[1] << 14) |\n            (data[2] << 7) |\n            (data[3]);\n  },\n  tagParsers = {\n    TXXX: function(tag) {\n      var i;\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the text fields\n          tag.description = parseUtf8(tag.data, 1, i);\n          // do not include the null terminator in the tag value\n          tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\\0*$/, '');\n          break;\n        }\n      }\n      tag.data = tag.value;\n    },\n    WXXX: function(tag) {\n      var i;\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.description = parseUtf8(tag.data, 1, i);\n          tag.url = parseUtf8(tag.data, i + 1, tag.data.length);\n          break;\n        }\n      }\n    },\n    PRIV: function(tag) {\n      var i;\n\n      for (i = 0; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.owner = parseIso88591(tag.data, 0, i);\n          break;\n        }\n      }\n      tag.privateData = tag.data.subarray(i + 1);\n      tag.data = tag.privateData;\n    }\n  },\n  MetadataStream;\n\nMetadataStream = function(options) {\n  var\n    settings = {\n      debug: !!(options && options.debug),\n\n      // the bytes of the program-level descriptor field in MP2T\n      // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n      // program element descriptors\"\n      descriptor: options && options.descriptor\n    },\n    // the total size in bytes of the ID3 tag being parsed\n    tagSize = 0,\n    // tag data that is not complete enough to be parsed\n    buffer = [],\n    // the total number of bytes currently in the buffer\n    bufferSize = 0,\n    i;\n\n  MetadataStream.prototype.init.call(this);\n\n  // calculate the text track in-band metadata track dispatch type\n  // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n  this.dispatchType = StreamTypes.METADATA_STREAM_TYPE.toString(16);\n  if (settings.descriptor) {\n    for (i = 0; i < settings.descriptor.length; i++) {\n      this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n    }\n  }\n\n  this.push = function(chunk) {\n    var tag, frameStart, frameSize, frame, i, frameHeader;\n    if (chunk.type !== 'timed-metadata') {\n      return;\n    }\n\n    // if data_alignment_indicator is set in the PES header,\n    // we must have the start of a new ID3 tag. Assume anything\n    // remaining in the buffer was malformed and throw it out\n    if (chunk.dataAlignmentIndicator) {\n      bufferSize = 0;\n      buffer.length = 0;\n    }\n\n    // ignore events that don't look like ID3 data\n    if (buffer.length === 0 &&\n        (chunk.data.length < 10 ||\n          chunk.data[0] !== 'I'.charCodeAt(0) ||\n          chunk.data[1] !== 'D'.charCodeAt(0) ||\n          chunk.data[2] !== '3'.charCodeAt(0))) {\n      if (settings.debug) {\n        // eslint-disable-next-line no-console\n        console.log('Skipping unrecognized metadata packet');\n      }\n      return;\n    }\n\n    // add this chunk to the data we've collected so far\n\n    buffer.push(chunk);\n    bufferSize += chunk.data.byteLength;\n\n    // grab the size of the entire frame from the ID3 header\n    if (buffer.length === 1) {\n      // the frame size is transmitted as a 28-bit integer in the\n      // last four bytes of the ID3 header.\n      // The most significant bit of each byte is dropped and the\n      // results concatenated to recover the actual value.\n      tagSize = parseSyncSafeInteger(chunk.data.subarray(6, 10));\n\n      // ID3 reports the tag size excluding the header but it's more\n      // convenient for our comparisons to include it\n      tagSize += 10;\n    }\n\n    // if the entire frame has not arrived, wait for more data\n    if (bufferSize < tagSize) {\n      return;\n    }\n\n    // collect the entire frame so it can be parsed\n    tag = {\n      data: new Uint8Array(tagSize),\n      frames: [],\n      pts: buffer[0].pts,\n      dts: buffer[0].dts\n    };\n    for (i = 0; i < tagSize;) {\n      tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n      i += buffer[0].data.byteLength;\n      bufferSize -= buffer[0].data.byteLength;\n      buffer.shift();\n    }\n\n    // find the start of the first frame and the end of the tag\n    frameStart = 10;\n    if (tag.data[5] & 0x40) {\n      // advance the frame start past the extended header\n      frameStart += 4; // header size field\n      frameStart += parseSyncSafeInteger(tag.data.subarray(10, 14));\n\n      // clip any padding off the end\n      tagSize -= parseSyncSafeInteger(tag.data.subarray(16, 20));\n    }\n\n    // parse one or more ID3 frames\n    // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n    do {\n      // determine the number of bytes in this frame\n      frameSize = parseSyncSafeInteger(tag.data.subarray(frameStart + 4, frameStart + 8));\n      if (frameSize < 1) {\n         // eslint-disable-next-line no-console\n        return console.log('Malformed ID3 frame encountered. Skipping metadata parsing.');\n      }\n      frameHeader = String.fromCharCode(tag.data[frameStart],\n                                        tag.data[frameStart + 1],\n                                        tag.data[frameStart + 2],\n                                        tag.data[frameStart + 3]);\n\n\n      frame = {\n        id: frameHeader,\n        data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n      };\n      frame.key = frame.id;\n      if (tagParsers[frame.id]) {\n        tagParsers[frame.id](frame);\n\n        // handle the special PRIV frame used to indicate the start\n        // time for raw AAC data\n        if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n          var\n            d = frame.data,\n            size = ((d[3] & 0x01)  << 30) |\n                   (d[4]  << 22) |\n                   (d[5] << 14) |\n                   (d[6] << 6) |\n                   (d[7] >>> 2);\n\n          size *= 4;\n          size += d[7] & 0x03;\n          frame.timeStamp = size;\n          // in raw AAC, all subsequent data will be timestamped based\n          // on the value of this frame\n          // we couldn't have known the appropriate pts and dts before\n          // parsing this ID3 tag so set those values now\n          if (tag.pts === undefined && tag.dts === undefined) {\n            tag.pts = frame.timeStamp;\n            tag.dts = frame.timeStamp;\n          }\n          this.trigger('timestamp', frame);\n        }\n      }\n      tag.frames.push(frame);\n\n      frameStart += 10; // advance past the frame header\n      frameStart += frameSize; // advance past the frame body\n    } while (frameStart < tagSize);\n    this.trigger('data', tag);\n  };\n};\nMetadataStream.prototype = new Stream();\n\nmodule.exports = MetadataStream;\n","'use strict';\nvar IteratorPrototype = require('../internals/iterators-core').IteratorPrototype;\nvar create = require('../internals/object-create');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar Iterators = require('../internals/iterators');\n\nvar returnThis = function () { return this; };\n\nmodule.exports = function (IteratorConstructor, NAME, next) {\n  var TO_STRING_TAG = NAME + ' Iterator';\n  IteratorConstructor.prototype = create(IteratorPrototype, { next: createPropertyDescriptor(1, next) });\n  setToStringTag(IteratorConstructor, TO_STRING_TAG, false, true);\n  Iterators[TO_STRING_TAG] = returnThis;\n  return IteratorConstructor;\n};\n","/**\n * @file html-media-source.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _globalDocument = require('global/document');\n\nvar _globalDocument2 = _interopRequireDefault(_globalDocument);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _virtualSourceBuffer = require('./virtual-source-buffer');\n\nvar _virtualSourceBuffer2 = _interopRequireDefault(_virtualSourceBuffer);\n\nvar _addTextTrackData = require('./add-text-track-data');\n\nvar _codecUtils = require('./codec-utils');\n\n/**\n * Our MediaSource implementation in HTML, mimics native\n * MediaSource where/if possible.\n *\n * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource\n * @class HtmlMediaSource\n * @extends videojs.EventTarget\n */\n\nvar HtmlMediaSource = (function (_videojs$EventTarget) {\n  _inherits(HtmlMediaSource, _videojs$EventTarget);\n\n  function HtmlMediaSource() {\n    var _this = this;\n\n    _classCallCheck(this, HtmlMediaSource);\n\n    _get(Object.getPrototypeOf(HtmlMediaSource.prototype), 'constructor', this).call(this);\n    var property = undefined;\n\n    this.nativeMediaSource_ = new _globalWindow2['default'].MediaSource();\n    // delegate to the native MediaSource's methods by default\n    for (property in this.nativeMediaSource_) {\n      if (!(property in HtmlMediaSource.prototype) && typeof this.nativeMediaSource_[property] === 'function') {\n        this[property] = this.nativeMediaSource_[property].bind(this.nativeMediaSource_);\n      }\n    }\n\n    // emulate `duration` and `seekable` until seeking can be\n    // handled uniformly for live streams\n    // see https://github.com/w3c/media-source/issues/5\n    this.duration_ = NaN;\n    Object.defineProperty(this, 'duration', {\n      get: function get() {\n        if (this.duration_ === Infinity) {\n          return this.duration_;\n        }\n        return this.nativeMediaSource_.duration;\n      },\n      set: function set(duration) {\n        this.duration_ = duration;\n        if (duration !== Infinity) {\n          this.nativeMediaSource_.duration = duration;\n          return;\n        }\n      }\n    });\n    Object.defineProperty(this, 'seekable', {\n      get: function get() {\n        if (this.duration_ === Infinity) {\n          return _videoJs2['default'].createTimeRanges([[0, this.nativeMediaSource_.duration]]);\n        }\n        return this.nativeMediaSource_.seekable;\n      }\n    });\n\n    Object.defineProperty(this, 'readyState', {\n      get: function get() {\n        return this.nativeMediaSource_.readyState;\n      }\n    });\n\n    Object.defineProperty(this, 'activeSourceBuffers', {\n      get: function get() {\n        return this.activeSourceBuffers_;\n      }\n    });\n\n    // the list of virtual and native SourceBuffers created by this\n    // MediaSource\n    this.sourceBuffers = [];\n\n    this.activeSourceBuffers_ = [];\n\n    /**\n     * update the list of active source buffers based upon various\n     * imformation from HLS and video.js\n     *\n     * @private\n     */\n    this.updateActiveSourceBuffers_ = function () {\n      // Retain the reference but empty the array\n      _this.activeSourceBuffers_.length = 0;\n\n      // If there is only one source buffer, then it will always be active and audio will\n      // be disabled based on the codec of the source buffer\n      if (_this.sourceBuffers.length === 1) {\n        var sourceBuffer = _this.sourceBuffers[0];\n\n        sourceBuffer.appendAudioInitSegment_ = true;\n        sourceBuffer.audioDisabled_ = !sourceBuffer.audioCodec_;\n        _this.activeSourceBuffers_.push(sourceBuffer);\n        return;\n      }\n\n      // There are 2 source buffers, a combined (possibly video only) source buffer and\n      // and an audio only source buffer.\n      // By default, the audio in the combined virtual source buffer is enabled\n      // and the audio-only source buffer (if it exists) is disabled.\n      var disableCombined = false;\n      var disableAudioOnly = true;\n\n      // TODO: maybe we can store the sourcebuffers on the track objects?\n      // safari may do something like this\n      for (var i = 0; i < _this.player_.audioTracks().length; i++) {\n        var track = _this.player_.audioTracks()[i];\n\n        if (track.enabled && track.kind !== 'main') {\n          // The enabled track is an alternate audio track so disable the audio in\n          // the combined source buffer and enable the audio-only source buffer.\n          disableCombined = true;\n          disableAudioOnly = false;\n          break;\n        }\n      }\n\n      _this.sourceBuffers.forEach(function (sourceBuffer) {\n        /* eslinst-disable */\n        // TODO once codecs are required, we can switch to using the codecs to determine\n        //      what stream is the video stream, rather than relying on videoTracks\n        /* eslinst-enable */\n\n        sourceBuffer.appendAudioInitSegment_ = true;\n\n        if (sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) {\n          // combined\n          sourceBuffer.audioDisabled_ = disableCombined;\n        } else if (sourceBuffer.videoCodec_ && !sourceBuffer.audioCodec_) {\n          // If the \"combined\" source buffer is video only, then we do not want\n          // disable the audio-only source buffer (this is mostly for demuxed\n          // audio and video hls)\n          sourceBuffer.audioDisabled_ = true;\n          disableAudioOnly = false;\n        } else if (!sourceBuffer.videoCodec_ && sourceBuffer.audioCodec_) {\n          // audio only\n          sourceBuffer.audioDisabled_ = disableAudioOnly;\n          if (disableAudioOnly) {\n            return;\n          }\n        }\n\n        _this.activeSourceBuffers_.push(sourceBuffer);\n      });\n    };\n\n    this.onPlayerMediachange_ = function () {\n      _this.sourceBuffers.forEach(function (sourceBuffer) {\n        sourceBuffer.appendAudioInitSegment_ = true;\n      });\n    };\n\n    this.onHlsReset_ = function () {\n      _this.sourceBuffers.forEach(function (sourceBuffer) {\n        if (sourceBuffer.transmuxer_) {\n          sourceBuffer.transmuxer_.postMessage({ action: 'resetCaptions' });\n        }\n      });\n    };\n\n    this.onHlsSegmentTimeMapping_ = function (event) {\n      _this.sourceBuffers.forEach(function (buffer) {\n        return buffer.timeMapping_ = event.mapping;\n      });\n    };\n\n    // Re-emit MediaSource events on the polyfill\n    ['sourceopen', 'sourceclose', 'sourceended'].forEach(function (eventName) {\n      this.nativeMediaSource_.addEventListener(eventName, this.trigger.bind(this));\n    }, this);\n\n    // capture the associated player when the MediaSource is\n    // successfully attached\n    this.on('sourceopen', function (event) {\n      // Get the player this MediaSource is attached to\n      var video = _globalDocument2['default'].querySelector('[src=\"' + _this.url_ + '\"]');\n\n      if (!video) {\n        return;\n      }\n\n      _this.player_ = (0, _videoJs2['default'])(video.parentNode);\n\n      // hls-reset is fired by videojs.Hls on to the tech after the main SegmentLoader\n      // resets its state and flushes the buffer\n      _this.player_.tech_.on('hls-reset', _this.onHlsReset_);\n      // hls-segment-time-mapping is fired by videojs.Hls on to the tech after the main\n      // SegmentLoader inspects an MTS segment and has an accurate stream to display\n      // time mapping\n      _this.player_.tech_.on('hls-segment-time-mapping', _this.onHlsSegmentTimeMapping_);\n\n      if (_this.player_.audioTracks && _this.player_.audioTracks()) {\n        _this.player_.audioTracks().on('change', _this.updateActiveSourceBuffers_);\n        _this.player_.audioTracks().on('addtrack', _this.updateActiveSourceBuffers_);\n        _this.player_.audioTracks().on('removetrack', _this.updateActiveSourceBuffers_);\n      }\n\n      _this.player_.on('mediachange', _this.onPlayerMediachange_);\n    });\n\n    this.on('sourceended', function (event) {\n      var duration = (0, _addTextTrackData.durationOfVideo)(_this.duration);\n\n      for (var i = 0; i < _this.sourceBuffers.length; i++) {\n        var sourcebuffer = _this.sourceBuffers[i];\n        var cues = sourcebuffer.metadataTrack_ && sourcebuffer.metadataTrack_.cues;\n\n        if (cues && cues.length) {\n          cues[cues.length - 1].endTime = duration;\n        }\n      }\n    });\n\n    // explicitly terminate any WebWorkers that were created\n    // by SourceHandlers\n    this.on('sourceclose', function (event) {\n      this.sourceBuffers.forEach(function (sourceBuffer) {\n        if (sourceBuffer.transmuxer_) {\n          sourceBuffer.transmuxer_.terminate();\n        }\n      });\n\n      this.sourceBuffers.length = 0;\n      if (!this.player_) {\n        return;\n      }\n\n      if (this.player_.audioTracks && this.player_.audioTracks()) {\n        this.player_.audioTracks().off('change', this.updateActiveSourceBuffers_);\n        this.player_.audioTracks().off('addtrack', this.updateActiveSourceBuffers_);\n        this.player_.audioTracks().off('removetrack', this.updateActiveSourceBuffers_);\n      }\n\n      // We can only change this if the player hasn't been disposed of yet\n      // because `off` eventually tries to use the el_ property. If it has\n      // been disposed of, then don't worry about it because there are no\n      // event handlers left to unbind anyway\n      if (this.player_.el_) {\n        this.player_.off('mediachange', this.onPlayerMediachange_);\n        this.player_.tech_.off('hls-reset', this.onHlsReset_);\n        this.player_.tech_.off('hls-segment-time-mapping', this.onHlsSegmentTimeMapping_);\n      }\n    });\n  }\n\n  /**\n   * Add a range that that can now be seeked to.\n   *\n   * @param {Double} start where to start the addition\n   * @param {Double} end where to end the addition\n   * @private\n   */\n\n  _createClass(HtmlMediaSource, [{\n    key: 'addSeekableRange_',\n    value: function addSeekableRange_(start, end) {\n      var error = undefined;\n\n      if (this.duration !== Infinity) {\n        error = new Error('MediaSource.addSeekableRange() can only be invoked ' + 'when the duration is Infinity');\n        error.name = 'InvalidStateError';\n        error.code = 11;\n        throw error;\n      }\n\n      if (end > this.nativeMediaSource_.duration || isNaN(this.nativeMediaSource_.duration)) {\n        this.nativeMediaSource_.duration = end;\n      }\n    }\n\n    /**\n     * Add a source buffer to the media source.\n     *\n     * @link https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/addSourceBuffer\n     * @param {String} type the content-type of the content\n     * @return {Object} the created source buffer\n     */\n  }, {\n    key: 'addSourceBuffer',\n    value: function addSourceBuffer(type) {\n      var buffer = undefined;\n      var parsedType = (0, _codecUtils.parseContentType)(type);\n\n      // Create a VirtualSourceBuffer to transmux MPEG-2 transport\n      // stream segments into fragmented MP4s\n      if (/^(video|audio)\\/mp2t$/i.test(parsedType.type)) {\n        var codecs = [];\n\n        if (parsedType.parameters && parsedType.parameters.codecs) {\n          codecs = parsedType.parameters.codecs.split(',');\n          codecs = (0, _codecUtils.translateLegacyCodecs)(codecs);\n          codecs = codecs.filter(function (codec) {\n            return (0, _codecUtils.isAudioCodec)(codec) || (0, _codecUtils.isVideoCodec)(codec);\n          });\n        }\n\n        if (codecs.length === 0) {\n          codecs = ['avc1.4d400d', 'mp4a.40.2'];\n        }\n\n        buffer = new _virtualSourceBuffer2['default'](this, codecs);\n\n        if (this.sourceBuffers.length !== 0) {\n          // If another VirtualSourceBuffer already exists, then we are creating a\n          // SourceBuffer for an alternate audio track and therefore we know that\n          // the source has both an audio and video track.\n          // That means we should trigger the manual creation of the real\n          // SourceBuffers instead of waiting for the transmuxer to return data\n          this.sourceBuffers[0].createRealSourceBuffers_();\n          buffer.createRealSourceBuffers_();\n\n          // Automatically disable the audio on the first source buffer if\n          // a second source buffer is ever created\n          this.sourceBuffers[0].audioDisabled_ = true;\n        }\n      } else {\n        // delegate to the native implementation\n        buffer = this.nativeMediaSource_.addSourceBuffer(type);\n      }\n\n      this.sourceBuffers.push(buffer);\n      return buffer;\n    }\n  }]);\n\n  return HtmlMediaSource;\n})(_videoJs2['default'].EventTarget);\n\nexports['default'] = HtmlMediaSource;\nmodule.exports = exports['default'];","'use strict';\n\nvar fails = require('./fails');\n\n// babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,\n// so we use an intermediate function.\nfunction RE(s, f) {\n  return RegExp(s, f);\n}\n\nexports.UNSUPPORTED_Y = fails(function () {\n  // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError\n  var re = RE('a', 'y');\n  re.lastIndex = 2;\n  return re.exec('abcd') != null;\n});\n\nexports.BROKEN_CARET = fails(function () {\n  // https://bugzilla.mozilla.org/show_bug.cgi?id=773687\n  var re = RE('^r', 'gy');\n  re.lastIndex = 2;\n  return re.exec('str') != null;\n});\n","var defaultEncoding\n/* istanbul ignore next */\nif (global.process && global.process.browser) {\n  defaultEncoding = 'utf-8'\n} else if (global.process && global.process.version) {\n  var pVersionMajor = parseInt(process.version.split('.')[0].slice(1), 10)\n\n  defaultEncoding = pVersionMajor >= 6 ? 'utf-8' : 'binary'\n} else {\n  defaultEncoding = 'utf-8'\n}\nmodule.exports = defaultEncoding\n","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\n/**\n * @file stream.js\n */\n/**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\nvar Stream = function () {\n  function Stream() {\n    _classCallCheck(this, Stream);\n\n    this.listeners = {};\n  }\n\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {String} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n\n  _createClass(Stream, [{\n    key: 'on',\n    value: function on(type, listener) {\n      if (!this.listeners[type]) {\n        this.listeners[type] = [];\n      }\n      this.listeners[type].push(listener);\n    }\n\n    /**\n     * Remove a listener for a specified event type.\n     *\n     * @param {String} type the event name\n     * @param {Function} listener  a function previously registered for this\n     * type of event through `on`\n     * @return {Boolean} if we could turn it off or not\n     */\n\n  }, {\n    key: 'off',\n    value: function off(type, listener) {\n      if (!this.listeners[type]) {\n        return false;\n      }\n\n      var index = this.listeners[type].indexOf(listener);\n\n      this.listeners[type].splice(index, 1);\n      return index > -1;\n    }\n\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     *\n     * @param {String} type the event name\n     */\n\n  }, {\n    key: 'trigger',\n    value: function trigger(type) {\n      var callbacks = this.listeners[type];\n      var i = void 0;\n      var length = void 0;\n      var args = void 0;\n\n      if (!callbacks) {\n        return;\n      }\n      // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n      if (arguments.length === 2) {\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        args = Array.prototype.slice.call(arguments, 1);\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].apply(this, args);\n        }\n      }\n    }\n\n    /**\n     * Destroys the stream and cleans up.\n     */\n\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.listeners = {};\n    }\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     *\n     * @param {Stream} destination the stream that will receive all `data` events\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n\n  }, {\n    key: 'pipe',\n    value: function pipe(destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n    }\n  }]);\n\n  return Stream;\n}();\n\nexports['default'] = Stream;","/**\r\n * Make a map and return a function for checking if a key\r\n * is in that map.\r\n * IMPORTANT: all calls of this function must be prefixed with\r\n * \\/\\*#\\_\\_PURE\\_\\_\\*\\/\r\n * So that rollup can tree-shake them if necessary.\r\n */\r\nfunction makeMap(str, expectsLowerCase) {\r\n    const map = Object.create(null);\r\n    const list = str.split(',');\r\n    for (let i = 0; i < list.length; i++) {\r\n        map[list[i]] = true;\r\n    }\r\n    return expectsLowerCase ? val => !!map[val.toLowerCase()] : val => !!map[val];\r\n}\n\n/**\r\n * dev only flag -> name mapping\r\n */\r\nconst PatchFlagNames = {\r\n    [1 /* TEXT */]: `TEXT`,\r\n    [2 /* CLASS */]: `CLASS`,\r\n    [4 /* STYLE */]: `STYLE`,\r\n    [8 /* PROPS */]: `PROPS`,\r\n    [16 /* FULL_PROPS */]: `FULL_PROPS`,\r\n    [32 /* HYDRATE_EVENTS */]: `HYDRATE_EVENTS`,\r\n    [64 /* STABLE_FRAGMENT */]: `STABLE_FRAGMENT`,\r\n    [128 /* KEYED_FRAGMENT */]: `KEYED_FRAGMENT`,\r\n    [256 /* UNKEYED_FRAGMENT */]: `UNKEYED_FRAGMENT`,\r\n    [512 /* NEED_PATCH */]: `NEED_PATCH`,\r\n    [1024 /* DYNAMIC_SLOTS */]: `DYNAMIC_SLOTS`,\r\n    [2048 /* DEV_ROOT_FRAGMENT */]: `DEV_ROOT_FRAGMENT`,\r\n    [-1 /* HOISTED */]: `HOISTED`,\r\n    [-2 /* BAIL */]: `BAIL`\r\n};\n\n/**\r\n * Dev only\r\n */\r\nconst slotFlagsText = {\r\n    [1 /* STABLE */]: 'STABLE',\r\n    [2 /* DYNAMIC */]: 'DYNAMIC',\r\n    [3 /* FORWARDED */]: 'FORWARDED'\r\n};\n\nconst GLOBALS_WHITE_LISTED = 'Infinity,undefined,NaN,isFinite,isNaN,parseFloat,parseInt,decodeURI,' +\r\n    'decodeURIComponent,encodeURI,encodeURIComponent,Math,Number,Date,Array,' +\r\n    'Object,Boolean,String,RegExp,Map,Set,JSON,Intl,BigInt';\r\nconst isGloballyWhitelisted = /*#__PURE__*/ makeMap(GLOBALS_WHITE_LISTED);\n\nconst range = 2;\r\nfunction generateCodeFrame(source, start = 0, end = source.length) {\r\n    const lines = source.split(/\\r?\\n/);\r\n    let count = 0;\r\n    const res = [];\r\n    for (let i = 0; i < lines.length; i++) {\r\n        count += lines[i].length + 1;\r\n        if (count >= start) {\r\n            for (let j = i - range; j <= i + range || end > count; j++) {\r\n                if (j < 0 || j >= lines.length)\r\n                    continue;\r\n                const line = j + 1;\r\n                res.push(`${line}${' '.repeat(Math.max(3 - String(line).length, 0))}|  ${lines[j]}`);\r\n                const lineLength = lines[j].length;\r\n                if (j === i) {\r\n                    // push underline\r\n                    const pad = start - (count - lineLength) + 1;\r\n                    const length = Math.max(1, end > count ? lineLength - pad : end - start);\r\n                    res.push(`   |  ` + ' '.repeat(pad) + '^'.repeat(length));\r\n                }\r\n                else if (j > i) {\r\n                    if (end > count) {\r\n                        const length = Math.max(Math.min(end - count, lineLength), 1);\r\n                        res.push(`   |  ` + '^'.repeat(length));\r\n                    }\r\n                    count += lineLength + 1;\r\n                }\r\n            }\r\n            break;\r\n        }\r\n    }\r\n    return res.join('\\n');\r\n}\n\n/**\r\n * On the client we only need to offer special cases for boolean attributes that\r\n * have different names from their corresponding dom properties:\r\n * - itemscope -> N/A\r\n * - allowfullscreen -> allowFullscreen\r\n * - formnovalidate -> formNoValidate\r\n * - ismap -> isMap\r\n * - nomodule -> noModule\r\n * - novalidate -> noValidate\r\n * - readonly -> readOnly\r\n */\r\nconst specialBooleanAttrs = `itemscope,allowfullscreen,formnovalidate,ismap,nomodule,novalidate,readonly`;\r\nconst isSpecialBooleanAttr = /*#__PURE__*/ makeMap(specialBooleanAttrs);\r\n/**\r\n * The full list is needed during SSR to produce the correct initial markup.\r\n */\r\nconst isBooleanAttr = /*#__PURE__*/ makeMap(specialBooleanAttrs +\r\n    `,async,autofocus,autoplay,controls,default,defer,disabled,hidden,` +\r\n    `loop,open,required,reversed,scoped,seamless,` +\r\n    `checked,muted,multiple,selected`);\r\nconst unsafeAttrCharRE = /[>/=\"'\\u0009\\u000a\\u000c\\u0020]/;\r\nconst attrValidationCache = {};\r\nfunction isSSRSafeAttrName(name) {\r\n    if (attrValidationCache.hasOwnProperty(name)) {\r\n        return attrValidationCache[name];\r\n    }\r\n    const isUnsafe = unsafeAttrCharRE.test(name);\r\n    if (isUnsafe) {\r\n        console.error(`unsafe attribute name: ${name}`);\r\n    }\r\n    return (attrValidationCache[name] = !isUnsafe);\r\n}\r\nconst propsToAttrMap = {\r\n    acceptCharset: 'accept-charset',\r\n    className: 'class',\r\n    htmlFor: 'for',\r\n    httpEquiv: 'http-equiv'\r\n};\r\n/**\r\n * CSS properties that accept plain numbers\r\n */\r\nconst isNoUnitNumericStyleProp = /*#__PURE__*/ makeMap(`animation-iteration-count,border-image-outset,border-image-slice,` +\r\n    `border-image-width,box-flex,box-flex-group,box-ordinal-group,column-count,` +\r\n    `columns,flex,flex-grow,flex-positive,flex-shrink,flex-negative,flex-order,` +\r\n    `grid-row,grid-row-end,grid-row-span,grid-row-start,grid-column,` +\r\n    `grid-column-end,grid-column-span,grid-column-start,font-weight,line-clamp,` +\r\n    `line-height,opacity,order,orphans,tab-size,widows,z-index,zoom,` +\r\n    // SVG\r\n    `fill-opacity,flood-opacity,stop-opacity,stroke-dasharray,stroke-dashoffset,` +\r\n    `stroke-miterlimit,stroke-opacity,stroke-width`);\r\n/**\r\n * Known attributes, this is used for stringification of runtime static nodes\r\n * so that we don't stringify bindings that cannot be set from HTML.\r\n * Don't also forget to allow `data-*` and `aria-*`!\r\n * Generated from https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes\r\n */\r\nconst isKnownAttr = /*#__PURE__*/ makeMap(`accept,accept-charset,accesskey,action,align,allow,alt,async,` +\r\n    `autocapitalize,autocomplete,autofocus,autoplay,background,bgcolor,` +\r\n    `border,buffered,capture,challenge,charset,checked,cite,class,code,` +\r\n    `codebase,color,cols,colspan,content,contenteditable,contextmenu,controls,` +\r\n    `coords,crossorigin,csp,data,datetime,decoding,default,defer,dir,dirname,` +\r\n    `disabled,download,draggable,dropzone,enctype,enterkeyhint,for,form,` +\r\n    `formaction,formenctype,formmethod,formnovalidate,formtarget,headers,` +\r\n    `height,hidden,high,href,hreflang,http-equiv,icon,id,importance,integrity,` +\r\n    `ismap,itemprop,keytype,kind,label,lang,language,loading,list,loop,low,` +\r\n    `manifest,max,maxlength,minlength,media,min,multiple,muted,name,novalidate,` +\r\n    `open,optimum,pattern,ping,placeholder,poster,preload,radiogroup,readonly,` +\r\n    `referrerpolicy,rel,required,reversed,rows,rowspan,sandbox,scope,scoped,` +\r\n    `selected,shape,size,sizes,slot,span,spellcheck,src,srcdoc,srclang,srcset,` +\r\n    `start,step,style,summary,tabindex,target,title,translate,type,usemap,` +\r\n    `value,width,wrap`);\n\nfunction normalizeStyle(value) {\r\n    if (isArray(value)) {\r\n        const res = {};\r\n        for (let i = 0; i < value.length; i++) {\r\n            const item = value[i];\r\n            const normalized = normalizeStyle(isString(item) ? parseStringStyle(item) : item);\r\n            if (normalized) {\r\n                for (const key in normalized) {\r\n                    res[key] = normalized[key];\r\n                }\r\n            }\r\n        }\r\n        return res;\r\n    }\r\n    else if (isObject(value)) {\r\n        return value;\r\n    }\r\n}\r\nconst listDelimiterRE = /;(?![^(]*\\))/g;\r\nconst propertyDelimiterRE = /:(.+)/;\r\nfunction parseStringStyle(cssText) {\r\n    const ret = {};\r\n    cssText.split(listDelimiterRE).forEach(item => {\r\n        if (item) {\r\n            const tmp = item.split(propertyDelimiterRE);\r\n            tmp.length > 1 && (ret[tmp[0].trim()] = tmp[1].trim());\r\n        }\r\n    });\r\n    return ret;\r\n}\r\nfunction stringifyStyle(styles) {\r\n    let ret = '';\r\n    if (!styles) {\r\n        return ret;\r\n    }\r\n    for (const key in styles) {\r\n        const value = styles[key];\r\n        const normalizedKey = key.startsWith(`--`) ? key : hyphenate(key);\r\n        if (isString(value) ||\r\n            (typeof value === 'number' && isNoUnitNumericStyleProp(normalizedKey))) {\r\n            // only render valid values\r\n            ret += `${normalizedKey}:${value};`;\r\n        }\r\n    }\r\n    return ret;\r\n}\r\nfunction normalizeClass(value) {\r\n    let res = '';\r\n    if (isString(value)) {\r\n        res = value;\r\n    }\r\n    else if (isArray(value)) {\r\n        for (let i = 0; i < value.length; i++) {\r\n            const normalized = normalizeClass(value[i]);\r\n            if (normalized) {\r\n                res += normalized + ' ';\r\n            }\r\n        }\r\n    }\r\n    else if (isObject(value)) {\r\n        for (const name in value) {\r\n            if (value[name]) {\r\n                res += name + ' ';\r\n            }\r\n        }\r\n    }\r\n    return res.trim();\r\n}\n\n// These tag configs are shared between compiler-dom and runtime-dom, so they\r\n// https://developer.mozilla.org/en-US/docs/Web/HTML/Element\r\nconst HTML_TAGS = 'html,body,base,head,link,meta,style,title,address,article,aside,footer,' +\r\n    'header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,div,dd,dl,dt,figcaption,' +\r\n    'figure,picture,hr,img,li,main,ol,p,pre,ul,a,b,abbr,bdi,bdo,br,cite,code,' +\r\n    'data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,s,samp,small,span,strong,sub,sup,' +\r\n    'time,u,var,wbr,area,audio,map,track,video,embed,object,param,source,' +\r\n    'canvas,script,noscript,del,ins,caption,col,colgroup,table,thead,tbody,td,' +\r\n    'th,tr,button,datalist,fieldset,form,input,label,legend,meter,optgroup,' +\r\n    'option,output,progress,select,textarea,details,dialog,menu,' +\r\n    'summary,template,blockquote,iframe,tfoot';\r\n// https://developer.mozilla.org/en-US/docs/Web/SVG/Element\r\nconst SVG_TAGS = 'svg,animate,animateMotion,animateTransform,circle,clipPath,color-profile,' +\r\n    'defs,desc,discard,ellipse,feBlend,feColorMatrix,feComponentTransfer,' +\r\n    'feComposite,feConvolveMatrix,feDiffuseLighting,feDisplacementMap,' +\r\n    'feDistanceLight,feDropShadow,feFlood,feFuncA,feFuncB,feFuncG,feFuncR,' +\r\n    'feGaussianBlur,feImage,feMerge,feMergeNode,feMorphology,feOffset,' +\r\n    'fePointLight,feSpecularLighting,feSpotLight,feTile,feTurbulence,filter,' +\r\n    'foreignObject,g,hatch,hatchpath,image,line,linearGradient,marker,mask,' +\r\n    'mesh,meshgradient,meshpatch,meshrow,metadata,mpath,path,pattern,' +\r\n    'polygon,polyline,radialGradient,rect,set,solidcolor,stop,switch,symbol,' +\r\n    'text,textPath,title,tspan,unknown,use,view';\r\nconst VOID_TAGS = 'area,base,br,col,embed,hr,img,input,link,meta,param,source,track,wbr';\r\nconst isHTMLTag = /*#__PURE__*/ makeMap(HTML_TAGS);\r\nconst isSVGTag = /*#__PURE__*/ makeMap(SVG_TAGS);\r\nconst isVoidTag = /*#__PURE__*/ makeMap(VOID_TAGS);\n\nconst escapeRE = /[\"'&<>]/;\r\nfunction escapeHtml(string) {\r\n    const str = '' + string;\r\n    const match = escapeRE.exec(str);\r\n    if (!match) {\r\n        return str;\r\n    }\r\n    let html = '';\r\n    let escaped;\r\n    let index;\r\n    let lastIndex = 0;\r\n    for (index = match.index; index < str.length; index++) {\r\n        switch (str.charCodeAt(index)) {\r\n            case 34: // \"\r\n                escaped = '&quot;';\r\n                break;\r\n            case 38: // &\r\n                escaped = '&amp;';\r\n                break;\r\n            case 39: // '\r\n                escaped = '&#39;';\r\n                break;\r\n            case 60: // <\r\n                escaped = '&lt;';\r\n                break;\r\n            case 62: // >\r\n                escaped = '&gt;';\r\n                break;\r\n            default:\r\n                continue;\r\n        }\r\n        if (lastIndex !== index) {\r\n            html += str.substring(lastIndex, index);\r\n        }\r\n        lastIndex = index + 1;\r\n        html += escaped;\r\n    }\r\n    return lastIndex !== index ? html + str.substring(lastIndex, index) : html;\r\n}\r\n// https://www.w3.org/TR/html52/syntax.html#comments\r\nconst commentStripRE = /^-?>|<!--|-->|--!>|<!-$/g;\r\nfunction escapeHtmlComment(src) {\r\n    return src.replace(commentStripRE, '');\r\n}\n\nfunction looseCompareArrays(a, b) {\r\n    if (a.length !== b.length)\r\n        return false;\r\n    let equal = true;\r\n    for (let i = 0; equal && i < a.length; i++) {\r\n        equal = looseEqual(a[i], b[i]);\r\n    }\r\n    return equal;\r\n}\r\nfunction looseEqual(a, b) {\r\n    if (a === b)\r\n        return true;\r\n    let aValidType = isDate(a);\r\n    let bValidType = isDate(b);\r\n    if (aValidType || bValidType) {\r\n        return aValidType && bValidType ? a.getTime() === b.getTime() : false;\r\n    }\r\n    aValidType = isArray(a);\r\n    bValidType = isArray(b);\r\n    if (aValidType || bValidType) {\r\n        return aValidType && bValidType ? looseCompareArrays(a, b) : false;\r\n    }\r\n    aValidType = isObject(a);\r\n    bValidType = isObject(b);\r\n    if (aValidType || bValidType) {\r\n        /* istanbul ignore if: this if will probably never be called */\r\n        if (!aValidType || !bValidType) {\r\n            return false;\r\n        }\r\n        const aKeysCount = Object.keys(a).length;\r\n        const bKeysCount = Object.keys(b).length;\r\n        if (aKeysCount !== bKeysCount) {\r\n            return false;\r\n        }\r\n        for (const key in a) {\r\n            const aHasKey = a.hasOwnProperty(key);\r\n            const bHasKey = b.hasOwnProperty(key);\r\n            if ((aHasKey && !bHasKey) ||\r\n                (!aHasKey && bHasKey) ||\r\n                !looseEqual(a[key], b[key])) {\r\n                return false;\r\n            }\r\n        }\r\n    }\r\n    return String(a) === String(b);\r\n}\r\nfunction looseIndexOf(arr, val) {\r\n    return arr.findIndex(item => looseEqual(item, val));\r\n}\n\n/**\r\n * For converting {{ interpolation }} values to displayed strings.\r\n * @private\r\n */\r\nconst toDisplayString = (val) => {\r\n    return val == null\r\n        ? ''\r\n        : isObject(val)\r\n            ? JSON.stringify(val, replacer, 2)\r\n            : String(val);\r\n};\r\nconst replacer = (_key, val) => {\r\n    if (isMap(val)) {\r\n        return {\r\n            [`Map(${val.size})`]: [...val.entries()].reduce((entries, [key, val]) => {\r\n                entries[`${key} =>`] = val;\r\n                return entries;\r\n            }, {})\r\n        };\r\n    }\r\n    else if (isSet(val)) {\r\n        return {\r\n            [`Set(${val.size})`]: [...val.values()]\r\n        };\r\n    }\r\n    else if (isObject(val) && !isArray(val) && !isPlainObject(val)) {\r\n        return String(val);\r\n    }\r\n    return val;\r\n};\n\n/**\r\n * List of @babel/parser plugins that are used for template expression\r\n * transforms and SFC script transforms. By default we enable proposals slated\r\n * for ES2020. This will need to be updated as the spec moves forward.\r\n * Full list at https://babeljs.io/docs/en/next/babel-parser#plugins\r\n */\r\nconst babelParserDefaultPlugins = [\r\n    'bigInt',\r\n    'optionalChaining',\r\n    'nullishCoalescingOperator'\r\n];\r\nconst EMPTY_OBJ = (process.env.NODE_ENV !== 'production')\r\n    ? Object.freeze({})\r\n    : {};\r\nconst EMPTY_ARR = (process.env.NODE_ENV !== 'production') ? Object.freeze([]) : [];\r\nconst NOOP = () => { };\r\n/**\r\n * Always return false.\r\n */\r\nconst NO = () => false;\r\nconst onRE = /^on[^a-z]/;\r\nconst isOn = (key) => onRE.test(key);\r\nconst isModelListener = (key) => key.startsWith('onUpdate:');\r\nconst extend = Object.assign;\r\nconst remove = (arr, el) => {\r\n    const i = arr.indexOf(el);\r\n    if (i > -1) {\r\n        arr.splice(i, 1);\r\n    }\r\n};\r\nconst hasOwnProperty = Object.prototype.hasOwnProperty;\r\nconst hasOwn = (val, key) => hasOwnProperty.call(val, key);\r\nconst isArray = Array.isArray;\r\nconst isMap = (val) => toTypeString(val) === '[object Map]';\r\nconst isSet = (val) => toTypeString(val) === '[object Set]';\r\nconst isDate = (val) => val instanceof Date;\r\nconst isFunction = (val) => typeof val === 'function';\r\nconst isString = (val) => typeof val === 'string';\r\nconst isSymbol = (val) => typeof val === 'symbol';\r\nconst isObject = (val) => val !== null && typeof val === 'object';\r\nconst isPromise = (val) => {\r\n    return isObject(val) && isFunction(val.then) && isFunction(val.catch);\r\n};\r\nconst objectToString = Object.prototype.toString;\r\nconst toTypeString = (value) => objectToString.call(value);\r\nconst toRawType = (value) => {\r\n    // extract \"RawType\" from strings like \"[object RawType]\"\r\n    return toTypeString(value).slice(8, -1);\r\n};\r\nconst isPlainObject = (val) => toTypeString(val) === '[object Object]';\r\nconst isIntegerKey = (key) => isString(key) &&\r\n    key !== 'NaN' &&\r\n    key[0] !== '-' &&\r\n    '' + parseInt(key, 10) === key;\r\nconst isReservedProp = /*#__PURE__*/ makeMap(\r\n// the leading comma is intentional so empty string \"\" is also included\r\n',key,ref,' +\r\n    'onVnodeBeforeMount,onVnodeMounted,' +\r\n    'onVnodeBeforeUpdate,onVnodeUpdated,' +\r\n    'onVnodeBeforeUnmount,onVnodeUnmounted');\r\nconst cacheStringFunction = (fn) => {\r\n    const cache = Object.create(null);\r\n    return ((str) => {\r\n        const hit = cache[str];\r\n        return hit || (cache[str] = fn(str));\r\n    });\r\n};\r\nconst camelizeRE = /-(\\w)/g;\r\n/**\r\n * @private\r\n */\r\nconst camelize = cacheStringFunction((str) => {\r\n    return str.replace(camelizeRE, (_, c) => (c ? c.toUpperCase() : ''));\r\n});\r\nconst hyphenateRE = /\\B([A-Z])/g;\r\n/**\r\n * @private\r\n */\r\nconst hyphenate = cacheStringFunction((str) => str.replace(hyphenateRE, '-$1').toLowerCase());\r\n/**\r\n * @private\r\n */\r\nconst capitalize = cacheStringFunction((str) => str.charAt(0).toUpperCase() + str.slice(1));\r\n/**\r\n * @private\r\n */\r\nconst toHandlerKey = cacheStringFunction((str) => (str ? `on${capitalize(str)}` : ``));\r\n// compare whether a value has changed, accounting for NaN.\r\nconst hasChanged = (value, oldValue) => value !== oldValue && (value === value || oldValue === oldValue);\r\nconst invokeArrayFns = (fns, arg) => {\r\n    for (let i = 0; i < fns.length; i++) {\r\n        fns[i](arg);\r\n    }\r\n};\r\nconst def = (obj, key, value) => {\r\n    Object.defineProperty(obj, key, {\r\n        configurable: true,\r\n        enumerable: false,\r\n        value\r\n    });\r\n};\r\nconst toNumber = (val) => {\r\n    const n = parseFloat(val);\r\n    return isNaN(n) ? val : n;\r\n};\r\nlet _globalThis;\r\nconst getGlobalThis = () => {\r\n    return (_globalThis ||\r\n        (_globalThis =\r\n            typeof globalThis !== 'undefined'\r\n                ? globalThis\r\n                : typeof self !== 'undefined'\r\n                    ? self\r\n                    : typeof window !== 'undefined'\r\n                        ? window\r\n                        : typeof global !== 'undefined'\r\n                            ? global\r\n                            : {}));\r\n};\n\nexport { EMPTY_ARR, EMPTY_OBJ, NO, NOOP, PatchFlagNames, babelParserDefaultPlugins, camelize, capitalize, def, escapeHtml, escapeHtmlComment, extend, generateCodeFrame, getGlobalThis, hasChanged, hasOwn, hyphenate, invokeArrayFns, isArray, isBooleanAttr, isDate, isFunction, isGloballyWhitelisted, isHTMLTag, isIntegerKey, isKnownAttr, isMap, isModelListener, isNoUnitNumericStyleProp, isObject, isOn, isPlainObject, isPromise, isReservedProp, isSSRSafeAttrName, isSVGTag, isSet, isSpecialBooleanAttr, isString, isSymbol, isVoidTag, looseEqual, looseIndexOf, makeMap, normalizeClass, normalizeStyle, objectToString, parseStringStyle, propsToAttrMap, remove, slotFlagsText, stringifyStyle, toDisplayString, toHandlerKey, toNumber, toRawType, toTypeString };\n","exports.pbkdf2 = require('./lib/async')\nexports.pbkdf2Sync = require('./lib/sync')\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * ISO 10126 padding strategy.\n\t */\n\tCryptoJS.pad.Iso10126 = {\n\t    pad: function (data, blockSize) {\n\t        // Shortcut\n\t        var blockSizeBytes = blockSize * 4;\n\n\t        // Count padding bytes\n\t        var nPaddingBytes = blockSizeBytes - data.sigBytes % blockSizeBytes;\n\n\t        // Pad\n\t        data.concat(CryptoJS.lib.WordArray.random(nPaddingBytes - 1)).\n\t             concat(CryptoJS.lib.WordArray.create([nPaddingBytes << 24], 1));\n\t    },\n\n\t    unpad: function (data) {\n\t        // Get number of padding bytes from last byte\n\t        var nPaddingBytes = data.words[(data.sigBytes - 1) >>> 2] & 0xff;\n\n\t        // Remove padding\n\t        data.sigBytes -= nPaddingBytes;\n\t    }\n\t};\n\n\n\treturn CryptoJS.pad.Iso10126;\n\n}));","var getPrototypeOf = require(\"./getPrototypeOf.js\");\n\nvar setPrototypeOf = require(\"./setPrototypeOf.js\");\n\nvar isNativeFunction = require(\"./isNativeFunction.js\");\n\nvar construct = require(\"./construct.js\");\n\nfunction _wrapNativeSuper(Class) {\n  var _cache = typeof Map === \"function\" ? new Map() : undefined;\n\n  module.exports = _wrapNativeSuper = function _wrapNativeSuper(Class) {\n    if (Class === null || !isNativeFunction(Class)) return Class;\n\n    if (typeof Class !== \"function\") {\n      throw new TypeError(\"Super expression must either be null or a function\");\n    }\n\n    if (typeof _cache !== \"undefined\") {\n      if (_cache.has(Class)) return _cache.get(Class);\n\n      _cache.set(Class, Wrapper);\n    }\n\n    function Wrapper() {\n      return construct(Class, arguments, getPrototypeOf(this).constructor);\n    }\n\n    Wrapper.prototype = Object.create(Class.prototype, {\n      constructor: {\n        value: Wrapper,\n        enumerable: false,\n        writable: true,\n        configurable: true\n      }\n    });\n    return setPrototypeOf(Wrapper, Class);\n  };\n\n  module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  return _wrapNativeSuper(Class);\n}\n\nmodule.exports = _wrapNativeSuper;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","/**\n * @file videojs-contrib-hls.js\n *\n * The main file for the HLS project.\n * License: https://github.com/videojs/videojs-contrib-hls/blob/master/LICENSE\n */\n'use strict';\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x4, _x5, _x6) { var _again = true; _function: while (_again) { var object = _x4, property = _x5, receiver = _x6; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x4 = parent; _x5 = property; _x6 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _globalDocument = require('global/document');\n\nvar _globalDocument2 = _interopRequireDefault(_globalDocument);\n\nvar _playlistLoader = require('./playlist-loader');\n\nvar _playlistLoader2 = _interopRequireDefault(_playlistLoader);\n\nvar _playlist = require('./playlist');\n\nvar _playlist2 = _interopRequireDefault(_playlist);\n\nvar _xhr = require('./xhr');\n\nvar _xhr2 = _interopRequireDefault(_xhr);\n\nvar _aesDecrypter = require('aes-decrypter');\n\nvar _binUtils = require('./bin-utils');\n\nvar _binUtils2 = _interopRequireDefault(_binUtils);\n\nvar _videojsContribMediaSources = require('videojs-contrib-media-sources');\n\nvar _m3u8Parser = require('m3u8-parser');\n\nvar _m3u8Parser2 = _interopRequireDefault(_m3u8Parser);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _masterPlaylistController = require('./master-playlist-controller');\n\nvar _config = require('./config');\n\nvar _config2 = _interopRequireDefault(_config);\n\nvar _renditionMixin = require('./rendition-mixin');\n\nvar _renditionMixin2 = _interopRequireDefault(_renditionMixin);\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _playbackWatcher = require('./playback-watcher');\n\nvar _playbackWatcher2 = _interopRequireDefault(_playbackWatcher);\n\nvar _reloadSourceOnError = require('./reload-source-on-error');\n\nvar _reloadSourceOnError2 = _interopRequireDefault(_reloadSourceOnError);\n\nvar _playlistSelectorsJs = require('./playlist-selectors.js');\n\nvar Hls = {\n  PlaylistLoader: _playlistLoader2['default'],\n  Playlist: _playlist2['default'],\n  Decrypter: _aesDecrypter.Decrypter,\n  AsyncStream: _aesDecrypter.AsyncStream,\n  decrypt: _aesDecrypter.decrypt,\n  utils: _binUtils2['default'],\n\n  STANDARD_PLAYLIST_SELECTOR: _playlistSelectorsJs.lastBandwidthSelector,\n  INITIAL_PLAYLIST_SELECTOR: _playlistSelectorsJs.lowestBitrateCompatibleVariantSelector,\n  comparePlaylistBandwidth: _playlistSelectorsJs.comparePlaylistBandwidth,\n  comparePlaylistResolution: _playlistSelectorsJs.comparePlaylistResolution,\n\n  xhr: (0, _xhr2['default'])()\n};\n\n// 0.5 MB/s\nvar INITIAL_BANDWIDTH = 4194304;\n\n// Define getter/setters for config properites\n['GOAL_BUFFER_LENGTH', 'MAX_GOAL_BUFFER_LENGTH', 'GOAL_BUFFER_LENGTH_RATE', 'BUFFER_LOW_WATER_LINE', 'MAX_BUFFER_LOW_WATER_LINE', 'BUFFER_LOW_WATER_LINE_RATE', 'BANDWIDTH_VARIANCE'].forEach(function (prop) {\n  Object.defineProperty(Hls, prop, {\n    get: function get() {\n      _videoJs2['default'].log.warn('using Hls.' + prop + ' is UNSAFE be sure you know what you are doing');\n      return _config2['default'][prop];\n    },\n    set: function set(value) {\n      _videoJs2['default'].log.warn('using Hls.' + prop + ' is UNSAFE be sure you know what you are doing');\n\n      if (typeof value !== 'number' || value < 0) {\n        _videoJs2['default'].log.warn('value of Hls.' + prop + ' must be greater than or equal to 0');\n        return;\n      }\n\n      _config2['default'][prop] = value;\n    }\n  });\n});\n\n/**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in hls.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleHlsMediaChange\n */\nvar handleHlsMediaChange = function handleHlsMediaChange(qualityLevels, playlistLoader) {\n  var newPlaylist = playlistLoader.media();\n  var selectedIndex = -1;\n\n  for (var i = 0; i < qualityLevels.length; i++) {\n    if (qualityLevels[i].id === newPlaylist.uri) {\n      selectedIndex = i;\n      break;\n    }\n  }\n\n  qualityLevels.selectedIndex_ = selectedIndex;\n  qualityLevels.trigger({\n    selectedIndex: selectedIndex,\n    type: 'change'\n  });\n};\n\n/**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} hls Hls object to listen to for media events.\n * @function handleHlsLoadedMetadata\n */\nvar handleHlsLoadedMetadata = function handleHlsLoadedMetadata(qualityLevels, hls) {\n  hls.representations().forEach(function (rep) {\n    qualityLevels.addQualityLevel(rep);\n  });\n  handleHlsMediaChange(qualityLevels, hls.playlists);\n};\n\n// HLS is a source handler, not a tech. Make sure attempts to use it\n// as one do not cause exceptions.\nHls.canPlaySource = function () {\n  return _videoJs2['default'].log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\n/**\n * Whether the browser has built-in HLS support.\n */\nHls.supportsNativeHls = (function () {\n  var video = _globalDocument2['default'].createElement('video');\n\n  // native HLS is definitely not supported if HTML5 video isn't\n  if (!_videoJs2['default'].getTech('Html5').isSupported()) {\n    return false;\n  }\n\n  // HLS manifests can go by many mime-types\n  var canPlay = [\n  // Apple santioned\n  'application/vnd.apple.mpegurl',\n  // Apple sanctioned for backwards compatibility\n  'audio/mpegurl',\n  // Very common\n  'audio/x-mpegurl',\n  // Very common\n  'application/x-mpegurl',\n  // Included for completeness\n  'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n\n  return canPlay.some(function (canItPlay) {\n    return (/maybe|probably/i.test(video.canPlayType(canItPlay))\n    );\n  });\n})();\n\n/**\n * HLS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\nHls.isSupported = function () {\n  return _videoJs2['default'].log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar Component = _videoJs2['default'].getComponent('Component');\n\n/**\n * The Hls Handler object, where we orchestrate all of the parts\n * of HLS to interact with video.js\n *\n * @class HlsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\nvar HlsHandler = (function (_Component) {\n  _inherits(HlsHandler, _Component);\n\n  function HlsHandler(source, tech, options) {\n    var _this = this;\n\n    _classCallCheck(this, HlsHandler);\n\n    _get(Object.getPrototypeOf(HlsHandler.prototype), 'constructor', this).call(this, tech, options.hls);\n\n    // tech.player() is deprecated but setup a reference to HLS for\n    // backwards-compatibility\n    if (tech.options_ && tech.options_.playerId) {\n      var _player = (0, _videoJs2['default'])(tech.options_.playerId);\n\n      if (!_player.hasOwnProperty('hls')) {\n        Object.defineProperty(_player, 'hls', {\n          get: function get() {\n            _videoJs2['default'].log.warn('player.hls is deprecated. Use player.tech_.hls instead.');\n            tech.trigger({ type: 'usage', name: 'hls-player-access' });\n            return _this;\n          }\n        });\n      }\n    }\n\n    this.tech_ = tech;\n    this.source_ = source;\n    this.stats = {};\n    this.ignoreNextSeekingEvent_ = false;\n    this.setOptions_();\n\n    // overriding native HLS only works if audio tracks have been emulated\n    // error early if we're misconfigured:\n    if (this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n      throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n    }\n\n    // listen for fullscreenchange events for this player so that we\n    // can adjust our quality selection quickly\n    this.on(_globalDocument2['default'], ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {\n      var fullscreenElement = _globalDocument2['default'].fullscreenElement || _globalDocument2['default'].webkitFullscreenElement || _globalDocument2['default'].mozFullScreenElement || _globalDocument2['default'].msFullscreenElement;\n\n      if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) {\n        _this.masterPlaylistController_.fastQualityChange_();\n      }\n    });\n\n    this.on(this.tech_, 'seeking', function () {\n      if (this.ignoreNextSeekingEvent_) {\n        this.ignoreNextSeekingEvent_ = false;\n        return;\n      }\n\n      this.setCurrentTime(this.tech_.currentTime());\n    });\n    this.on(this.tech_, 'error', function () {\n      if (this.masterPlaylistController_) {\n        this.masterPlaylistController_.pauseLoading();\n      }\n    });\n\n    this.on(this.tech_, 'play', this.play);\n  }\n\n  /**\n   * The Source Handler object, which informs video.js what additional\n   * MIME types are supported and sets up playback. It is registered\n   * automatically to the appropriate tech based on the capabilities of\n   * the browser it is running in. It is not necessary to use or modify\n   * this object in normal usage.\n   */\n\n  _createClass(HlsHandler, [{\n    key: 'setOptions_',\n    value: function setOptions_() {\n      var _this2 = this;\n\n      // defaults\n      this.options_.withCredentials = this.options_.withCredentials || false;\n\n      if (typeof this.options_.blacklistDuration !== 'number') {\n        this.options_.blacklistDuration = 5 * 60;\n      }\n\n      // start playlist selection at a reasonable bandwidth for\n      // broadband internet (0.5 MB/s) or mobile (0.0625 MB/s)\n      if (typeof this.options_.bandwidth !== 'number') {\n        this.options_.bandwidth = INITIAL_BANDWIDTH;\n      }\n\n      // If the bandwidth number is unchanged from the initial setting\n      // then this takes precedence over the enableLowInitialPlaylist option\n      this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === INITIAL_BANDWIDTH;\n\n      // grab options passed to player.src\n      ['withCredentials', 'bandwidth', 'handleManifestRedirects'].forEach(function (option) {\n        if (typeof _this2.source_[option] !== 'undefined') {\n          _this2.options_[option] = _this2.source_[option];\n        }\n      });\n\n      this.bandwidth = this.options_.bandwidth;\n    }\n\n    /**\n     * called when player.src gets called, handle a new source\n     *\n     * @param {Object} src the source object to handle\n     */\n  }, {\n    key: 'src',\n    value: function src(_src) {\n      var _this3 = this;\n\n      // do nothing if the src is falsey\n      if (!_src) {\n        return;\n      }\n      this.setOptions_();\n      // add master playlist controller options\n      this.options_.url = this.source_.src;\n      this.options_.tech = this.tech_;\n      this.options_.externHls = Hls;\n\n      this.masterPlaylistController_ = new _masterPlaylistController.MasterPlaylistController(this.options_);\n      this.playbackWatcher_ = new _playbackWatcher2['default'](_videoJs2['default'].mergeOptions(this.options_, {\n        seekable: function seekable() {\n          return _this3.seekable();\n        }\n      }));\n\n      this.masterPlaylistController_.on('error', function () {\n        var player = _videoJs2['default'].players[_this3.tech_.options_.playerId];\n\n        player.error(_this3.masterPlaylistController_.error);\n      });\n\n      // `this` in selectPlaylist should be the HlsHandler for backwards\n      // compatibility with < v2\n      this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : Hls.STANDARD_PLAYLIST_SELECTOR.bind(this);\n\n      this.masterPlaylistController_.selectInitialPlaylist = Hls.INITIAL_PLAYLIST_SELECTOR.bind(this);\n\n      // re-expose some internal objects for backwards compatibility with < v2\n      this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;\n      this.mediaSource = this.masterPlaylistController_.mediaSource;\n\n      // Proxy assignment of some properties to the master playlist\n      // controller. Using a custom property for backwards compatibility\n      // with < v2\n      Object.defineProperties(this, {\n        selectPlaylist: {\n          get: function get() {\n            return this.masterPlaylistController_.selectPlaylist;\n          },\n          set: function set(selectPlaylist) {\n            this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);\n          }\n        },\n        throughput: {\n          get: function get() {\n            return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;\n          },\n          set: function set(throughput) {\n            this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput;\n            // By setting `count` to 1 the throughput value becomes the starting value\n            // for the cumulative average\n            this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;\n          }\n        },\n        bandwidth: {\n          get: function get() {\n            return this.masterPlaylistController_.mainSegmentLoader_.bandwidth;\n          },\n          set: function set(bandwidth) {\n            this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth;\n            // setting the bandwidth manually resets the throughput counter\n            // `count` is set to zero that current value of `rate` isn't included\n            // in the cumulative average\n            this.masterPlaylistController_.mainSegmentLoader_.throughput = {\n              rate: 0,\n              count: 0\n            };\n          }\n        },\n        /**\n         * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n         * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n         * the entire process after that - decryption, transmuxing, and appending - provided\n         * by `throughput`.\n         *\n         * Since the two process are serial, the overall system bandwidth is given by:\n         *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n         */\n        systemBandwidth: {\n          get: function get() {\n            var invBandwidth = 1 / (this.bandwidth || 1);\n            var invThroughput = undefined;\n\n            if (this.throughput > 0) {\n              invThroughput = 1 / this.throughput;\n            } else {\n              invThroughput = 0;\n            }\n\n            var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n\n            return systemBitrate;\n          },\n          set: function set() {\n            _videoJs2['default'].log.error('The \"systemBandwidth\" property is read-only');\n          }\n        }\n      });\n\n      Object.defineProperties(this.stats, {\n        bandwidth: {\n          get: function get() {\n            return _this3.bandwidth || 0;\n          },\n          enumerable: true\n        },\n        mediaRequests: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaRequests_() || 0;\n          },\n          enumerable: true\n        },\n        mediaRequestsAborted: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0;\n          },\n          enumerable: true\n        },\n        mediaRequestsTimedout: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0;\n          },\n          enumerable: true\n        },\n        mediaRequestsErrored: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0;\n          },\n          enumerable: true\n        },\n        mediaTransferDuration: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaTransferDuration_() || 0;\n          },\n          enumerable: true\n        },\n        mediaBytesTransferred: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0;\n          },\n          enumerable: true\n        },\n        mediaSecondsLoaded: {\n          get: function get() {\n            return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0;\n          },\n          enumerable: true\n        }\n      });\n\n      this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));\n\n      this.masterPlaylistController_.on('selectedinitialmedia', function () {\n        // Add the manual rendition mix-in to HlsHandler\n        (0, _renditionMixin2['default'])(_this3);\n      });\n\n      // the bandwidth of the primary segment loader is our best\n      // estimate of overall bandwidth\n      this.on(this.masterPlaylistController_, 'progress', function () {\n        this.tech_.trigger('progress');\n      });\n\n      // In the live case, we need to ignore the very first `seeking` event since\n      // that will be the result of the seek-to-live behavior\n      this.on(this.masterPlaylistController_, 'firstplay', function () {\n        this.ignoreNextSeekingEvent_ = true;\n      });\n\n      this.tech_.ready(function () {\n        return _this3.setupQualityLevels_();\n      });\n\n      // do nothing if the tech has been disposed already\n      // this can occur if someone sets the src in player.ready(), for instance\n      if (!this.tech_.el()) {\n        return;\n      }\n\n      this.tech_.src(_videoJs2['default'].URL.createObjectURL(this.masterPlaylistController_.mediaSource));\n    }\n\n    /**\n     * Initializes the quality levels and sets listeners to update them.\n     *\n     * @method setupQualityLevels_\n     * @private\n     */\n  }, {\n    key: 'setupQualityLevels_',\n    value: function setupQualityLevels_() {\n      var _this4 = this;\n\n      var player = _videoJs2['default'].players[this.tech_.options_.playerId];\n\n      if (player && player.qualityLevels) {\n        this.qualityLevels_ = player.qualityLevels();\n\n        this.masterPlaylistController_.on('selectedinitialmedia', function () {\n          handleHlsLoadedMetadata(_this4.qualityLevels_, _this4);\n        });\n\n        this.playlists.on('mediachange', function () {\n          handleHlsMediaChange(_this4.qualityLevels_, _this4.playlists);\n        });\n      }\n    }\n\n    /**\n     * Begin playing the video.\n     */\n  }, {\n    key: 'play',\n    value: function play() {\n      this.masterPlaylistController_.play();\n    }\n\n    /**\n     * a wrapper around the function in MasterPlaylistController\n     */\n  }, {\n    key: 'setCurrentTime',\n    value: function setCurrentTime(currentTime) {\n      this.masterPlaylistController_.setCurrentTime(currentTime);\n    }\n\n    /**\n     * a wrapper around the function in MasterPlaylistController\n     */\n  }, {\n    key: 'duration',\n    value: function duration() {\n      return this.masterPlaylistController_.duration();\n    }\n\n    /**\n     * a wrapper around the function in MasterPlaylistController\n     */\n  }, {\n    key: 'seekable',\n    value: function seekable() {\n      return this.masterPlaylistController_.seekable();\n    }\n\n    /**\n    * Abort all outstanding work and cleanup.\n    */\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      if (this.playbackWatcher_) {\n        this.playbackWatcher_.dispose();\n      }\n      if (this.masterPlaylistController_) {\n        this.masterPlaylistController_.dispose();\n      }\n      if (this.qualityLevels_) {\n        this.qualityLevels_.dispose();\n      }\n      _get(Object.getPrototypeOf(HlsHandler.prototype), 'dispose', this).call(this);\n    }\n  }]);\n\n  return HlsHandler;\n})(Component);\n\nvar HlsSourceHandler = function HlsSourceHandler(mode) {\n  return {\n    canHandleSource: function canHandleSource(srcObj) {\n      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];\n\n      var localOptions = _videoJs2['default'].mergeOptions(_videoJs2['default'].options, options);\n\n      // this forces video.js to skip this tech/mode if its not the one we have been\n      // overriden to use, by returing that we cannot handle the source.\n      if (localOptions.hls && localOptions.hls.mode && localOptions.hls.mode !== mode) {\n        return false;\n      }\n      return HlsSourceHandler.canPlayType(srcObj.type, localOptions);\n    },\n    handleSource: function handleSource(source, tech) {\n      var options = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];\n\n      var localOptions = _videoJs2['default'].mergeOptions(_videoJs2['default'].options, options, { hls: { mode: mode } });\n\n      if (mode === 'flash') {\n        // We need to trigger this asynchronously to give others the chance\n        // to bind to the event when a source is set at player creation\n        tech.setTimeout(function () {\n          tech.trigger('loadstart');\n        }, 1);\n      }\n\n      tech.hls = new HlsHandler(source, tech, localOptions);\n      tech.hls.xhr = (0, _xhr2['default'])();\n\n      tech.hls.src(source.src);\n      return tech.hls;\n    },\n    canPlayType: function canPlayType(type) {\n      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];\n\n      var localOptions = _videoJs2['default'].mergeOptions(_videoJs2['default'].options, options);\n\n      if (HlsSourceHandler.canPlayType(type, localOptions)) {\n        return 'maybe';\n      }\n      return '';\n    }\n  };\n};\n\nHlsSourceHandler.canPlayType = function (type, options) {\n  // No support for IE 10 or below\n  if (_videoJs2['default'].browser.IE_VERSION && _videoJs2['default'].browser.IE_VERSION <= 10) {\n    return false;\n  }\n\n  var mpegurlRE = /^(audio|video|application)\\/(x-|vnd\\.apple\\.)?mpegurl/i;\n\n  // favor native HLS support if it's available\n  if (!options.hls.overrideNative && Hls.supportsNativeHls) {\n    return false;\n  }\n  return mpegurlRE.test(type);\n};\n\nif (typeof _videoJs2['default'].MediaSource === 'undefined' || typeof _videoJs2['default'].URL === 'undefined') {\n  _videoJs2['default'].MediaSource = _videojsContribMediaSources.MediaSource;\n  _videoJs2['default'].URL = _videojsContribMediaSources.URL;\n}\n\nvar flashTech = _videoJs2['default'].getTech('Flash');\n\n// register source handlers with the appropriate techs\nif (_videojsContribMediaSources.MediaSource.supportsNativeMediaSources()) {\n  _videoJs2['default'].getTech('Html5').registerSourceHandler(HlsSourceHandler('html5'), 0);\n}\nif (_globalWindow2['default'].Uint8Array && flashTech) {\n  flashTech.registerSourceHandler(HlsSourceHandler('flash'));\n}\n\n_videoJs2['default'].HlsHandler = HlsHandler;\n_videoJs2['default'].HlsSourceHandler = HlsSourceHandler;\n_videoJs2['default'].Hls = Hls;\nif (!_videoJs2['default'].use) {\n  _videoJs2['default'].registerComponent('Hls', Hls);\n}\n_videoJs2['default'].m3u8 = _m3u8Parser2['default'];\n_videoJs2['default'].options.hls = _videoJs2['default'].options.hls || {};\n\nif (_videoJs2['default'].registerPlugin) {\n  _videoJs2['default'].registerPlugin('reloadSourceOnError', _reloadSourceOnError2['default']);\n} else {\n  _videoJs2['default'].plugin('reloadSourceOnError', _reloadSourceOnError2['default']);\n}\n\nmodule.exports = {\n  Hls: Hls,\n  HlsHandler: HlsHandler,\n  HlsSourceHandler: HlsSourceHandler\n};","'use strict';\nvar $ = require('../internals/export');\nvar IndexedObject = require('../internals/indexed-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar arrayMethodIsStrict = require('../internals/array-method-is-strict');\n\nvar nativeJoin = [].join;\n\nvar ES3_STRINGS = IndexedObject != Object;\nvar STRICT_METHOD = arrayMethodIsStrict('join', ',');\n\n// `Array.prototype.join` method\n// https://tc39.es/ecma262/#sec-array.prototype.join\n$({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD }, {\n  join: function join(separator) {\n    return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);\n  }\n});\n","'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _aesDecrypter = require('aes-decrypter');\n\nvar _binUtils = require('./bin-utils');\n\n/**\n * Our web worker interface so that things can talk to aes-decrypter\n * that will be running in a web worker. the scope is passed to this by\n * webworkify.\n *\n * @param {Object} self\n *        the scope for the web worker\n */\nvar DecrypterWorker = function DecrypterWorker(self) {\n  self.onmessage = function (event) {\n    var data = event.data;\n    var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n    var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n    var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n\n    /* eslint-disable no-new, handle-callback-err */\n    new _aesDecrypter.Decrypter(encrypted, key, iv, function (err, bytes) {\n      _globalWindow2['default'].postMessage((0, _binUtils.createTransferableMessage)({\n        source: data.source,\n        decrypted: bytes\n      }), [bytes.buffer]);\n    });\n    /* eslint-enable */\n  };\n};\n\nexports['default'] = function (self) {\n  return new DecrypterWorker(self);\n};\n\nmodule.exports = exports['default'];","/**\n * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined\n * in FIPS 180-2\n * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.\n * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet\n *\n */\n\nvar inherits = require('inherits')\nvar Hash = require('./hash')\nvar Buffer = require('safe-buffer').Buffer\n\nvar K = [\n  0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,\n  0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,\n  0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,\n  0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,\n  0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,\n  0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,\n  0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,\n  0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,\n  0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,\n  0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,\n  0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,\n  0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,\n  0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,\n  0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,\n  0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,\n  0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2\n]\n\nvar W = new Array(64)\n\nfunction Sha256 () {\n  this.init()\n\n  this._w = W // new Array(64)\n\n  Hash.call(this, 64, 56)\n}\n\ninherits(Sha256, Hash)\n\nSha256.prototype.init = function () {\n  this._a = 0x6a09e667\n  this._b = 0xbb67ae85\n  this._c = 0x3c6ef372\n  this._d = 0xa54ff53a\n  this._e = 0x510e527f\n  this._f = 0x9b05688c\n  this._g = 0x1f83d9ab\n  this._h = 0x5be0cd19\n\n  return this\n}\n\nfunction ch (x, y, z) {\n  return z ^ (x & (y ^ z))\n}\n\nfunction maj (x, y, z) {\n  return (x & y) | (z & (x | y))\n}\n\nfunction sigma0 (x) {\n  return (x >>> 2 | x << 30) ^ (x >>> 13 | x << 19) ^ (x >>> 22 | x << 10)\n}\n\nfunction sigma1 (x) {\n  return (x >>> 6 | x << 26) ^ (x >>> 11 | x << 21) ^ (x >>> 25 | x << 7)\n}\n\nfunction gamma0 (x) {\n  return (x >>> 7 | x << 25) ^ (x >>> 18 | x << 14) ^ (x >>> 3)\n}\n\nfunction gamma1 (x) {\n  return (x >>> 17 | x << 15) ^ (x >>> 19 | x << 13) ^ (x >>> 10)\n}\n\nSha256.prototype._update = function (M) {\n  var W = this._w\n\n  var a = this._a | 0\n  var b = this._b | 0\n  var c = this._c | 0\n  var d = this._d | 0\n  var e = this._e | 0\n  var f = this._f | 0\n  var g = this._g | 0\n  var h = this._h | 0\n\n  for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)\n  for (; i < 64; ++i) W[i] = (gamma1(W[i - 2]) + W[i - 7] + gamma0(W[i - 15]) + W[i - 16]) | 0\n\n  for (var j = 0; j < 64; ++j) {\n    var T1 = (h + sigma1(e) + ch(e, f, g) + K[j] + W[j]) | 0\n    var T2 = (sigma0(a) + maj(a, b, c)) | 0\n\n    h = g\n    g = f\n    f = e\n    e = (d + T1) | 0\n    d = c\n    c = b\n    b = a\n    a = (T1 + T2) | 0\n  }\n\n  this._a = (a + this._a) | 0\n  this._b = (b + this._b) | 0\n  this._c = (c + this._c) | 0\n  this._d = (d + this._d) | 0\n  this._e = (e + this._e) | 0\n  this._f = (f + this._f) | 0\n  this._g = (g + this._g) | 0\n  this._h = (h + this._h) | 0\n}\n\nSha256.prototype._hash = function () {\n  var H = Buffer.allocUnsafe(32)\n\n  H.writeInt32BE(this._a, 0)\n  H.writeInt32BE(this._b, 4)\n  H.writeInt32BE(this._c, 8)\n  H.writeInt32BE(this._d, 12)\n  H.writeInt32BE(this._e, 16)\n  H.writeInt32BE(this._f, 20)\n  H.writeInt32BE(this._g, 24)\n  H.writeInt32BE(this._h, 28)\n\n  return H\n}\n\nmodule.exports = Sha256\n","'use strict';\nvar isArray = require('../internals/is-array');\nvar toLength = require('../internals/to-length');\nvar bind = require('../internals/function-bind-context');\n\n// `FlattenIntoArray` abstract operation\n// https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray\nvar flattenIntoArray = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {\n  var targetIndex = start;\n  var sourceIndex = 0;\n  var mapFn = mapper ? bind(mapper, thisArg, 3) : false;\n  var element;\n\n  while (sourceIndex < sourceLen) {\n    if (sourceIndex in source) {\n      element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];\n\n      if (depth > 0 && isArray(element)) {\n        targetIndex = flattenIntoArray(target, original, element, toLength(element.length), targetIndex, depth - 1) - 1;\n      } else {\n        if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError('Exceed the acceptable array length');\n        target[targetIndex] = element;\n      }\n\n      targetIndex++;\n    }\n    sourceIndex++;\n  }\n  return targetIndex;\n};\n\nmodule.exports = flattenIntoArray;\n","/**\n * mux.js\n *\n * Copyright (c) 2015 Brightcove\n * All rights reserved.\n *\n * Functions that generate fragmented MP4s suitable for use with Media\n * Source Extensions.\n */\n'use strict';\n\nvar UINT32_MAX = Math.pow(2, 32) - 1;\n\nvar box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd,\n    trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex,\n    trun, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR,\n    AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS;\n\n// pre-calculate constants\n(function() {\n  var i;\n  types = {\n    avc1: [], // codingname\n    avcC: [],\n    btrt: [],\n    dinf: [],\n    dref: [],\n    esds: [],\n    ftyp: [],\n    hdlr: [],\n    mdat: [],\n    mdhd: [],\n    mdia: [],\n    mfhd: [],\n    minf: [],\n    moof: [],\n    moov: [],\n    mp4a: [], // codingname\n    mvex: [],\n    mvhd: [],\n    sdtp: [],\n    smhd: [],\n    stbl: [],\n    stco: [],\n    stsc: [],\n    stsd: [],\n    stsz: [],\n    stts: [],\n    styp: [],\n    tfdt: [],\n    tfhd: [],\n    traf: [],\n    trak: [],\n    trun: [],\n    trex: [],\n    tkhd: [],\n    vmhd: []\n  };\n\n  // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n  // don't throw an error\n  if (typeof Uint8Array === 'undefined') {\n    return;\n  }\n\n  for (i in types) {\n    if (types.hasOwnProperty(i)) {\n      types[i] = [\n        i.charCodeAt(0),\n        i.charCodeAt(1),\n        i.charCodeAt(2),\n        i.charCodeAt(3)\n      ];\n    }\n  }\n\n  MAJOR_BRAND = new Uint8Array([\n    'i'.charCodeAt(0),\n    's'.charCodeAt(0),\n    'o'.charCodeAt(0),\n    'm'.charCodeAt(0)\n  ]);\n  AVC1_BRAND = new Uint8Array([\n    'a'.charCodeAt(0),\n    'v'.charCodeAt(0),\n    'c'.charCodeAt(0),\n    '1'.charCodeAt(0)\n  ]);\n  MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n  VIDEO_HDLR = new Uint8Array([\n    0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x56, 0x69, 0x64, 0x65,\n    0x6f, 0x48, 0x61, 0x6e,\n    0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n  ]);\n  AUDIO_HDLR = new Uint8Array([\n    0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x53, 0x6f, 0x75, 0x6e,\n    0x64, 0x48, 0x61, 0x6e,\n    0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n  ]);\n  HDLR_TYPES = {\n    video: VIDEO_HDLR,\n    audio: AUDIO_HDLR\n  };\n  DREF = new Uint8Array([\n    0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // entry_count\n    0x00, 0x00, 0x00, 0x0c, // entry_size\n    0x75, 0x72, 0x6c, 0x20, // 'url' type\n    0x00, // version 0\n    0x00, 0x00, 0x01 // entry_flags\n  ]);\n  SMHD = new Uint8Array([\n    0x00,             // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00,       // balance, 0 means centered\n    0x00, 0x00        // reserved\n  ]);\n  STCO = new Uint8Array([\n    0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00 // entry_count\n  ]);\n  STSC = STCO;\n  STSZ = new Uint8Array([\n    0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // sample_size\n    0x00, 0x00, 0x00, 0x00 // sample_count\n  ]);\n  STTS = STCO;\n  VMHD = new Uint8Array([\n    0x00, // version\n    0x00, 0x00, 0x01, // flags\n    0x00, 0x00, // graphicsmode\n    0x00, 0x00,\n    0x00, 0x00,\n    0x00, 0x00 // opcolor\n  ]);\n}());\n\nbox = function(type) {\n  var\n    payload = [],\n    size = 0,\n    i,\n    result,\n    view;\n\n  for (i = 1; i < arguments.length; i++) {\n    payload.push(arguments[i]);\n  }\n\n  i = payload.length;\n\n  // calculate the total size we need to allocate\n  while (i--) {\n    size += payload[i].byteLength;\n  }\n  result = new Uint8Array(size + 8);\n  view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n  view.setUint32(0, result.byteLength);\n  result.set(type, 4);\n\n  // copy the payload into the result\n  for (i = 0, size = 8; i < payload.length; i++) {\n    result.set(payload[i], size);\n    size += payload[i].byteLength;\n  }\n  return result;\n};\n\ndinf = function() {\n  return box(types.dinf, box(types.dref, DREF));\n};\n\nesds = function(track) {\n  return box(types.esds, new Uint8Array([\n    0x00, // version\n    0x00, 0x00, 0x00, // flags\n\n    // ES_Descriptor\n    0x03, // tag, ES_DescrTag\n    0x19, // length\n    0x00, 0x00, // ES_ID\n    0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority\n\n    // DecoderConfigDescriptor\n    0x04, // tag, DecoderConfigDescrTag\n    0x11, // length\n    0x40, // object type\n    0x15,  // streamType\n    0x00, 0x06, 0x00, // bufferSizeDB\n    0x00, 0x00, 0xda, 0xc0, // maxBitrate\n    0x00, 0x00, 0xda, 0xc0, // avgBitrate\n\n    // DecoderSpecificInfo\n    0x05, // tag, DecoderSpecificInfoTag\n    0x02, // length\n    // ISO/IEC 14496-3, AudioSpecificConfig\n    // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n    (track.audioobjecttype << 3) | (track.samplingfrequencyindex >>> 1),\n    (track.samplingfrequencyindex << 7) | (track.channelcount << 3),\n    0x06, 0x01, 0x02 // GASpecificConfig\n  ]));\n};\n\nftyp = function() {\n  return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n};\n\nhdlr = function(type) {\n  return box(types.hdlr, HDLR_TYPES[type]);\n};\nmdat = function(data) {\n  return box(types.mdat, data);\n};\nmdhd = function(track) {\n  var result = new Uint8Array([\n    0x00,                   // version 0\n    0x00, 0x00, 0x00,       // flags\n    0x00, 0x00, 0x00, 0x02, // creation_time\n    0x00, 0x00, 0x00, 0x03, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n\n    (track.duration >>> 24) & 0xFF,\n    (track.duration >>> 16) & 0xFF,\n    (track.duration >>>  8) & 0xFF,\n    track.duration & 0xFF,  // duration\n    0x55, 0xc4,             // 'und' language (undetermined)\n    0x00, 0x00\n  ]);\n\n  // Use the sample rate from the track metadata, when it is\n  // defined. The sample rate can be parsed out of an ADTS header, for\n  // instance.\n  if (track.samplerate) {\n    result[12] = (track.samplerate >>> 24) & 0xFF;\n    result[13] = (track.samplerate >>> 16) & 0xFF;\n    result[14] = (track.samplerate >>>  8) & 0xFF;\n    result[15] = (track.samplerate)        & 0xFF;\n  }\n\n  return box(types.mdhd, result);\n};\nmdia = function(track) {\n  return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n};\nmfhd = function(sequenceNumber) {\n  return box(types.mfhd, new Uint8Array([\n    0x00,\n    0x00, 0x00, 0x00, // flags\n    (sequenceNumber & 0xFF000000) >> 24,\n    (sequenceNumber & 0xFF0000) >> 16,\n    (sequenceNumber & 0xFF00) >> 8,\n    sequenceNumber & 0xFF // sequence_number\n  ]));\n};\nminf = function(track) {\n  return box(types.minf,\n             track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD),\n             dinf(),\n             stbl(track));\n};\nmoof = function(sequenceNumber, tracks) {\n  var\n    trackFragments = [],\n    i = tracks.length;\n  // build traf boxes for each track fragment\n  while (i--) {\n    trackFragments[i] = traf(tracks[i]);\n  }\n  return box.apply(null, [\n    types.moof,\n    mfhd(sequenceNumber)\n  ].concat(trackFragments));\n};\n/**\n * Returns a movie box.\n * @param tracks {array} the tracks associated with this movie\n * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n */\nmoov = function(tracks) {\n  var\n    i = tracks.length,\n    boxes = [];\n\n  while (i--) {\n    boxes[i] = trak(tracks[i]);\n  }\n\n  return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n};\nmvex = function(tracks) {\n  var\n    i = tracks.length,\n    boxes = [];\n\n  while (i--) {\n    boxes[i] = trex(tracks[i]);\n  }\n  return box.apply(null, [types.mvex].concat(boxes));\n};\nmvhd = function(duration) {\n  var\n    bytes = new Uint8Array([\n      0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01, // creation_time\n      0x00, 0x00, 0x00, 0x02, // modification_time\n      0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n      (duration & 0xFF000000) >> 24,\n      (duration & 0xFF0000) >> 16,\n      (duration & 0xFF00) >> 8,\n      duration & 0xFF, // duration\n      0x00, 0x01, 0x00, 0x00, // 1.0 rate\n      0x01, 0x00, // 1.0 volume\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x01, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00, // pre_defined\n      0xff, 0xff, 0xff, 0xff // next_track_ID\n    ]);\n  return box(types.mvhd, bytes);\n};\n\nsdtp = function(track) {\n  var\n    samples = track.samples || [],\n    bytes = new Uint8Array(4 + samples.length),\n    flags,\n    i;\n\n  // leave the full box header (4 bytes) all zero\n\n  // write the sample table\n  for (i = 0; i < samples.length; i++) {\n    flags = samples[i].flags;\n\n    bytes[i + 4] = (flags.dependsOn << 4) |\n      (flags.isDependedOn << 2) |\n      (flags.hasRedundancy);\n  }\n\n  return box(types.sdtp,\n             bytes);\n};\n\nstbl = function(track) {\n  return box(types.stbl,\n             stsd(track),\n             box(types.stts, STTS),\n             box(types.stsc, STSC),\n             box(types.stsz, STSZ),\n             box(types.stco, STCO));\n};\n\n(function() {\n  var videoSample, audioSample;\n\n  stsd = function(track) {\n\n    return box(types.stsd, new Uint8Array([\n      0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01\n    ]), track.type === 'video' ? videoSample(track) : audioSample(track));\n  };\n\n  videoSample = function(track) {\n    var\n      sps = track.sps || [],\n      pps = track.pps || [],\n      sequenceParameterSets = [],\n      pictureParameterSets = [],\n      i;\n\n    // assemble the SPSs\n    for (i = 0; i < sps.length; i++) {\n      sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n      sequenceParameterSets.push((sps[i].byteLength & 0xFF)); // sequenceParameterSetLength\n      sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n    }\n\n    // assemble the PPSs\n    for (i = 0; i < pps.length; i++) {\n      pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n      pictureParameterSets.push((pps[i].byteLength & 0xFF));\n      pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n    }\n\n    return box(types.avc1, new Uint8Array([\n      0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00, // pre_defined\n      (track.width & 0xff00) >> 8,\n      track.width & 0xff, // width\n      (track.height & 0xff00) >> 8,\n      track.height & 0xff, // height\n      0x00, 0x48, 0x00, 0x00, // horizresolution\n      0x00, 0x48, 0x00, 0x00, // vertresolution\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // frame_count\n      0x13,\n      0x76, 0x69, 0x64, 0x65,\n      0x6f, 0x6a, 0x73, 0x2d,\n      0x63, 0x6f, 0x6e, 0x74,\n      0x72, 0x69, 0x62, 0x2d,\n      0x68, 0x6c, 0x73, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, // compressorname\n      0x00, 0x18, // depth = 24\n      0x11, 0x11 // pre_defined = -1\n    ]), box(types.avcC, new Uint8Array([\n      0x01, // configurationVersion\n      track.profileIdc, // AVCProfileIndication\n      track.profileCompatibility, // profile_compatibility\n      track.levelIdc, // AVCLevelIndication\n      0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n    ].concat([\n      sps.length // numOfSequenceParameterSets\n    ]).concat(sequenceParameterSets).concat([\n      pps.length // numOfPictureParameterSets\n    ]).concat(pictureParameterSets))), // \"PPS\"\n            box(types.btrt, new Uint8Array([\n              0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB\n              0x00, 0x2d, 0xc6, 0xc0, // maxBitrate\n              0x00, 0x2d, 0xc6, 0xc0\n            ])) // avgBitrate\n              );\n  };\n\n  audioSample = function(track) {\n    return box(types.mp4a, new Uint8Array([\n\n      // SampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00,\n      0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n\n      // AudioSampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      (track.channelcount & 0xff00) >> 8,\n      (track.channelcount & 0xff), // channelcount\n\n      (track.samplesize & 0xff00) >> 8,\n      (track.samplesize & 0xff), // samplesize\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n\n      (track.samplerate & 0xff00) >> 8,\n      (track.samplerate & 0xff),\n      0x00, 0x00 // samplerate, 16.16\n\n      // MP4AudioSampleEntry, ISO/IEC 14496-14\n    ]), esds(track));\n  };\n}());\n\ntkhd = function(track) {\n  var result = new Uint8Array([\n    0x00, // version 0\n    0x00, 0x00, 0x07, // flags\n    0x00, 0x00, 0x00, 0x00, // creation_time\n    0x00, 0x00, 0x00, 0x00, // modification_time\n    (track.id & 0xFF000000) >> 24,\n    (track.id & 0xFF0000) >> 16,\n    (track.id & 0xFF00) >> 8,\n    track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x00, // reserved\n    (track.duration & 0xFF000000) >> 24,\n    (track.duration & 0xFF0000) >> 16,\n    (track.duration & 0xFF00) >> 8,\n    track.duration & 0xFF, // duration\n    0x00, 0x00, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, // layer\n    0x00, 0x00, // alternate_group\n    0x01, 0x00, // non-audio track volume\n    0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00,\n    0x00, 0x01, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00,\n    0x00, 0x00, 0x00, 0x00,\n    0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    (track.width & 0xFF00) >> 8,\n    track.width & 0xFF,\n    0x00, 0x00, // width\n    (track.height & 0xFF00) >> 8,\n    track.height & 0xFF,\n    0x00, 0x00 // height\n  ]);\n\n  return box(types.tkhd, result);\n};\n\n/**\n * Generate a track fragment (traf) box. A traf box collects metadata\n * about tracks in a movie fragment (moof) box.\n */\ntraf = function(track) {\n  var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun,\n      sampleDependencyTable, dataOffset,\n      upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n\n  trackFragmentHeader = box(types.tfhd, new Uint8Array([\n    0x00, // version 0\n    0x00, 0x00, 0x3a, // flags\n    (track.id & 0xFF000000) >> 24,\n    (track.id & 0xFF0000) >> 16,\n    (track.id & 0xFF00) >> 8,\n    (track.id & 0xFF), // track_ID\n    0x00, 0x00, 0x00, 0x01, // sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x00, 0x00, 0x00  // default_sample_flags\n  ]));\n\n  upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / (UINT32_MAX + 1));\n  lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % (UINT32_MAX + 1));\n\n  trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([\n    0x01, // version 1\n    0x00, 0x00, 0x00, // flags\n    // baseMediaDecodeTime\n    (upperWordBaseMediaDecodeTime >>> 24) & 0xFF,\n    (upperWordBaseMediaDecodeTime >>> 16) & 0xFF,\n    (upperWordBaseMediaDecodeTime >>>  8) & 0xFF,\n    upperWordBaseMediaDecodeTime & 0xFF,\n    (lowerWordBaseMediaDecodeTime >>> 24) & 0xFF,\n    (lowerWordBaseMediaDecodeTime >>> 16) & 0xFF,\n    (lowerWordBaseMediaDecodeTime >>>  8) & 0xFF,\n    lowerWordBaseMediaDecodeTime & 0xFF\n  ]));\n\n  // the data offset specifies the number of bytes from the start of\n  // the containing moof to the first payload byte of the associated\n  // mdat\n  dataOffset = (32 + // tfhd\n                20 + // tfdt\n                8 +  // traf header\n                16 + // mfhd\n                8 +  // moof header\n                8);  // mdat header\n\n  // audio tracks require less metadata\n  if (track.type === 'audio') {\n    trackFragmentRun = trun(track, dataOffset);\n    return box(types.traf,\n               trackFragmentHeader,\n               trackFragmentDecodeTime,\n               trackFragmentRun);\n  }\n\n  // video tracks should contain an independent and disposable samples\n  // box (sdtp)\n  // generate one and adjust offsets to match\n  sampleDependencyTable = sdtp(track);\n  trackFragmentRun = trun(track,\n                          sampleDependencyTable.length + dataOffset);\n  return box(types.traf,\n             trackFragmentHeader,\n             trackFragmentDecodeTime,\n             trackFragmentRun,\n             sampleDependencyTable);\n};\n\n/**\n * Generate a track box.\n * @param track {object} a track definition\n * @return {Uint8Array} the track box\n */\ntrak = function(track) {\n  track.duration = track.duration || 0xffffffff;\n  return box(types.trak,\n             tkhd(track),\n             mdia(track));\n};\n\ntrex = function(track) {\n  var result = new Uint8Array([\n    0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    (track.id & 0xFF000000) >> 24,\n    (track.id & 0xFF0000) >> 16,\n    (track.id & 0xFF00) >> 8,\n    (track.id & 0xFF), // track_ID\n    0x00, 0x00, 0x00, 0x01, // default_sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x01, 0x00, 0x01 // default_sample_flags\n  ]);\n  // the last two bytes of default_sample_flags is the sample\n  // degradation priority, a hint about the importance of this sample\n  // relative to others. Lower the degradation priority for all sample\n  // types other than video.\n  if (track.type !== 'video') {\n    result[result.length - 1] = 0x00;\n  }\n\n  return box(types.trex, result);\n};\n\n(function() {\n  var audioTrun, videoTrun, trunHeader;\n\n  // This method assumes all samples are uniform. That is, if a\n  // duration is present for the first sample, it will be present for\n  // all subsequent samples.\n  // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n  trunHeader = function(samples, offset) {\n    var durationPresent = 0, sizePresent = 0,\n        flagsPresent = 0, compositionTimeOffset = 0;\n\n    // trun flag constants\n    if (samples.length) {\n      if (samples[0].duration !== undefined) {\n        durationPresent = 0x1;\n      }\n      if (samples[0].size !== undefined) {\n        sizePresent = 0x2;\n      }\n      if (samples[0].flags !== undefined) {\n        flagsPresent = 0x4;\n      }\n      if (samples[0].compositionTimeOffset !== undefined) {\n        compositionTimeOffset = 0x8;\n      }\n    }\n\n    return [\n      0x00, // version 0\n      0x00,\n      durationPresent | sizePresent | flagsPresent | compositionTimeOffset,\n      0x01, // flags\n      (samples.length & 0xFF000000) >>> 24,\n      (samples.length & 0xFF0000) >>> 16,\n      (samples.length & 0xFF00) >>> 8,\n      samples.length & 0xFF, // sample_count\n      (offset & 0xFF000000) >>> 24,\n      (offset & 0xFF0000) >>> 16,\n      (offset & 0xFF00) >>> 8,\n      offset & 0xFF // data_offset\n    ];\n  };\n\n  videoTrun = function(track, offset) {\n    var bytes, samples, sample, i;\n\n    samples = track.samples || [];\n    offset += 8 + 12 + (16 * samples.length);\n\n    bytes = trunHeader(samples, offset);\n\n    for (i = 0; i < samples.length; i++) {\n      sample = samples[i];\n      bytes = bytes.concat([\n        (sample.duration & 0xFF000000) >>> 24,\n        (sample.duration & 0xFF0000) >>> 16,\n        (sample.duration & 0xFF00) >>> 8,\n        sample.duration & 0xFF, // sample_duration\n        (sample.size & 0xFF000000) >>> 24,\n        (sample.size & 0xFF0000) >>> 16,\n        (sample.size & 0xFF00) >>> 8,\n        sample.size & 0xFF, // sample_size\n        (sample.flags.isLeading << 2) | sample.flags.dependsOn,\n        (sample.flags.isDependedOn << 6) |\n          (sample.flags.hasRedundancy << 4) |\n          (sample.flags.paddingValue << 1) |\n          sample.flags.isNonSyncSample,\n        sample.flags.degradationPriority & 0xF0 << 8,\n        sample.flags.degradationPriority & 0x0F, // sample_flags\n        (sample.compositionTimeOffset & 0xFF000000) >>> 24,\n        (sample.compositionTimeOffset & 0xFF0000) >>> 16,\n        (sample.compositionTimeOffset & 0xFF00) >>> 8,\n        sample.compositionTimeOffset & 0xFF // sample_composition_time_offset\n      ]);\n    }\n    return box(types.trun, new Uint8Array(bytes));\n  };\n\n  audioTrun = function(track, offset) {\n    var bytes, samples, sample, i;\n\n    samples = track.samples || [];\n    offset += 8 + 12 + (8 * samples.length);\n\n    bytes = trunHeader(samples, offset);\n\n    for (i = 0; i < samples.length; i++) {\n      sample = samples[i];\n      bytes = bytes.concat([\n        (sample.duration & 0xFF000000) >>> 24,\n        (sample.duration & 0xFF0000) >>> 16,\n        (sample.duration & 0xFF00) >>> 8,\n        sample.duration & 0xFF, // sample_duration\n        (sample.size & 0xFF000000) >>> 24,\n        (sample.size & 0xFF0000) >>> 16,\n        (sample.size & 0xFF00) >>> 8,\n        sample.size & 0xFF]); // sample_size\n    }\n\n    return box(types.trun, new Uint8Array(bytes));\n  };\n\n  trun = function(track, offset) {\n    if (track.type === 'audio') {\n      return audioTrun(track, offset);\n    }\n\n    return videoTrun(track, offset);\n  };\n}());\n\nmodule.exports = {\n  ftyp: ftyp,\n  mdat: mdat,\n  moof: moof,\n  moov: moov,\n  initSegment: function(tracks) {\n    var\n      fileType = ftyp(),\n      movie = moov(tracks),\n      result;\n\n    result = new Uint8Array(fileType.byteLength + movie.byteLength);\n    result.set(fileType);\n    result.set(movie, fileType.byteLength);\n    return result;\n  }\n};\n","import getWindow from \"./getWindow.js\";\nexport default function getWindowScroll(node) {\n  var win = getWindow(node);\n  var scrollLeft = win.pageXOffset;\n  var scrollTop = win.pageYOffset;\n  return {\n    scrollLeft: scrollLeft,\n    scrollTop: scrollTop\n  };\n}",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./evpkdf\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./enc-base64\", \"./md5\", \"./evpkdf\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var BlockCipher = C_lib.BlockCipher;\n\t    var C_algo = C.algo;\n\n\t    // Permuted Choice 1 constants\n\t    var PC1 = [\n\t        57, 49, 41, 33, 25, 17, 9,  1,\n\t        58, 50, 42, 34, 26, 18, 10, 2,\n\t        59, 51, 43, 35, 27, 19, 11, 3,\n\t        60, 52, 44, 36, 63, 55, 47, 39,\n\t        31, 23, 15, 7,  62, 54, 46, 38,\n\t        30, 22, 14, 6,  61, 53, 45, 37,\n\t        29, 21, 13, 5,  28, 20, 12, 4\n\t    ];\n\n\t    // Permuted Choice 2 constants\n\t    var PC2 = [\n\t        14, 17, 11, 24, 1,  5,\n\t        3,  28, 15, 6,  21, 10,\n\t        23, 19, 12, 4,  26, 8,\n\t        16, 7,  27, 20, 13, 2,\n\t        41, 52, 31, 37, 47, 55,\n\t        30, 40, 51, 45, 33, 48,\n\t        44, 49, 39, 56, 34, 53,\n\t        46, 42, 50, 36, 29, 32\n\t    ];\n\n\t    // Cumulative bit shift constants\n\t    var BIT_SHIFTS = [1,  2,  4,  6,  8,  10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28];\n\n\t    // SBOXes and round permutation constants\n\t    var SBOX_P = [\n\t        {\n\t            0x0: 0x808200,\n\t            0x10000000: 0x8000,\n\t            0x20000000: 0x808002,\n\t            0x30000000: 0x2,\n\t            0x40000000: 0x200,\n\t            0x50000000: 0x808202,\n\t            0x60000000: 0x800202,\n\t            0x70000000: 0x800000,\n\t            0x80000000: 0x202,\n\t            0x90000000: 0x800200,\n\t            0xa0000000: 0x8200,\n\t            0xb0000000: 0x808000,\n\t            0xc0000000: 0x8002,\n\t            0xd0000000: 0x800002,\n\t            0xe0000000: 0x0,\n\t            0xf0000000: 0x8202,\n\t            0x8000000: 0x0,\n\t            0x18000000: 0x808202,\n\t            0x28000000: 0x8202,\n\t            0x38000000: 0x8000,\n\t            0x48000000: 0x808200,\n\t            0x58000000: 0x200,\n\t            0x68000000: 0x808002,\n\t            0x78000000: 0x2,\n\t            0x88000000: 0x800200,\n\t            0x98000000: 0x8200,\n\t            0xa8000000: 0x808000,\n\t            0xb8000000: 0x800202,\n\t            0xc8000000: 0x800002,\n\t            0xd8000000: 0x8002,\n\t            0xe8000000: 0x202,\n\t            0xf8000000: 0x800000,\n\t            0x1: 0x8000,\n\t            0x10000001: 0x2,\n\t            0x20000001: 0x808200,\n\t            0x30000001: 0x800000,\n\t            0x40000001: 0x808002,\n\t            0x50000001: 0x8200,\n\t            0x60000001: 0x200,\n\t            0x70000001: 0x800202,\n\t            0x80000001: 0x808202,\n\t            0x90000001: 0x808000,\n\t            0xa0000001: 0x800002,\n\t            0xb0000001: 0x8202,\n\t            0xc0000001: 0x202,\n\t            0xd0000001: 0x800200,\n\t            0xe0000001: 0x8002,\n\t            0xf0000001: 0x0,\n\t            0x8000001: 0x808202,\n\t            0x18000001: 0x808000,\n\t            0x28000001: 0x800000,\n\t            0x38000001: 0x200,\n\t            0x48000001: 0x8000,\n\t            0x58000001: 0x800002,\n\t            0x68000001: 0x2,\n\t            0x78000001: 0x8202,\n\t            0x88000001: 0x8002,\n\t            0x98000001: 0x800202,\n\t            0xa8000001: 0x202,\n\t            0xb8000001: 0x808200,\n\t            0xc8000001: 0x800200,\n\t            0xd8000001: 0x0,\n\t            0xe8000001: 0x8200,\n\t            0xf8000001: 0x808002\n\t        },\n\t        {\n\t            0x0: 0x40084010,\n\t            0x1000000: 0x4000,\n\t            0x2000000: 0x80000,\n\t            0x3000000: 0x40080010,\n\t            0x4000000: 0x40000010,\n\t            0x5000000: 0x40084000,\n\t            0x6000000: 0x40004000,\n\t            0x7000000: 0x10,\n\t            0x8000000: 0x84000,\n\t            0x9000000: 0x40004010,\n\t            0xa000000: 0x40000000,\n\t            0xb000000: 0x84010,\n\t            0xc000000: 0x80010,\n\t            0xd000000: 0x0,\n\t            0xe000000: 0x4010,\n\t            0xf000000: 0x40080000,\n\t            0x800000: 0x40004000,\n\t            0x1800000: 0x84010,\n\t            0x2800000: 0x10,\n\t            0x3800000: 0x40004010,\n\t            0x4800000: 0x40084010,\n\t            0x5800000: 0x40000000,\n\t            0x6800000: 0x80000,\n\t            0x7800000: 0x40080010,\n\t            0x8800000: 0x80010,\n\t            0x9800000: 0x0,\n\t            0xa800000: 0x4000,\n\t            0xb800000: 0x40080000,\n\t            0xc800000: 0x40000010,\n\t            0xd800000: 0x84000,\n\t            0xe800000: 0x40084000,\n\t            0xf800000: 0x4010,\n\t            0x10000000: 0x0,\n\t            0x11000000: 0x40080010,\n\t            0x12000000: 0x40004010,\n\t            0x13000000: 0x40084000,\n\t            0x14000000: 0x40080000,\n\t            0x15000000: 0x10,\n\t            0x16000000: 0x84010,\n\t            0x17000000: 0x4000,\n\t            0x18000000: 0x4010,\n\t            0x19000000: 0x80000,\n\t            0x1a000000: 0x80010,\n\t            0x1b000000: 0x40000010,\n\t            0x1c000000: 0x84000,\n\t            0x1d000000: 0x40004000,\n\t            0x1e000000: 0x40000000,\n\t            0x1f000000: 0x40084010,\n\t            0x10800000: 0x84010,\n\t            0x11800000: 0x80000,\n\t            0x12800000: 0x40080000,\n\t            0x13800000: 0x4000,\n\t            0x14800000: 0x40004000,\n\t            0x15800000: 0x40084010,\n\t            0x16800000: 0x10,\n\t            0x17800000: 0x40000000,\n\t            0x18800000: 0x40084000,\n\t            0x19800000: 0x40000010,\n\t            0x1a800000: 0x40004010,\n\t            0x1b800000: 0x80010,\n\t            0x1c800000: 0x0,\n\t            0x1d800000: 0x4010,\n\t            0x1e800000: 0x40080010,\n\t            0x1f800000: 0x84000\n\t        },\n\t        {\n\t            0x0: 0x104,\n\t            0x100000: 0x0,\n\t            0x200000: 0x4000100,\n\t            0x300000: 0x10104,\n\t            0x400000: 0x10004,\n\t            0x500000: 0x4000004,\n\t            0x600000: 0x4010104,\n\t            0x700000: 0x4010000,\n\t            0x800000: 0x4000000,\n\t            0x900000: 0x4010100,\n\t            0xa00000: 0x10100,\n\t            0xb00000: 0x4010004,\n\t            0xc00000: 0x4000104,\n\t            0xd00000: 0x10000,\n\t            0xe00000: 0x4,\n\t            0xf00000: 0x100,\n\t            0x80000: 0x4010100,\n\t            0x180000: 0x4010004,\n\t            0x280000: 0x0,\n\t            0x380000: 0x4000100,\n\t            0x480000: 0x4000004,\n\t            0x580000: 0x10000,\n\t            0x680000: 0x10004,\n\t            0x780000: 0x104,\n\t            0x880000: 0x4,\n\t            0x980000: 0x100,\n\t            0xa80000: 0x4010000,\n\t            0xb80000: 0x10104,\n\t            0xc80000: 0x10100,\n\t            0xd80000: 0x4000104,\n\t            0xe80000: 0x4010104,\n\t            0xf80000: 0x4000000,\n\t            0x1000000: 0x4010100,\n\t            0x1100000: 0x10004,\n\t            0x1200000: 0x10000,\n\t            0x1300000: 0x4000100,\n\t            0x1400000: 0x100,\n\t            0x1500000: 0x4010104,\n\t            0x1600000: 0x4000004,\n\t            0x1700000: 0x0,\n\t            0x1800000: 0x4000104,\n\t            0x1900000: 0x4000000,\n\t            0x1a00000: 0x4,\n\t            0x1b00000: 0x10100,\n\t            0x1c00000: 0x4010000,\n\t            0x1d00000: 0x104,\n\t            0x1e00000: 0x10104,\n\t            0x1f00000: 0x4010004,\n\t            0x1080000: 0x4000000,\n\t            0x1180000: 0x104,\n\t            0x1280000: 0x4010100,\n\t            0x1380000: 0x0,\n\t            0x1480000: 0x10004,\n\t            0x1580000: 0x4000100,\n\t            0x1680000: 0x100,\n\t            0x1780000: 0x4010004,\n\t            0x1880000: 0x10000,\n\t            0x1980000: 0x4010104,\n\t            0x1a80000: 0x10104,\n\t            0x1b80000: 0x4000004,\n\t            0x1c80000: 0x4000104,\n\t            0x1d80000: 0x4010000,\n\t            0x1e80000: 0x4,\n\t            0x1f80000: 0x10100\n\t        },\n\t        {\n\t            0x0: 0x80401000,\n\t            0x10000: 0x80001040,\n\t            0x20000: 0x401040,\n\t            0x30000: 0x80400000,\n\t            0x40000: 0x0,\n\t            0x50000: 0x401000,\n\t            0x60000: 0x80000040,\n\t            0x70000: 0x400040,\n\t            0x80000: 0x80000000,\n\t            0x90000: 0x400000,\n\t            0xa0000: 0x40,\n\t            0xb0000: 0x80001000,\n\t            0xc0000: 0x80400040,\n\t            0xd0000: 0x1040,\n\t            0xe0000: 0x1000,\n\t            0xf0000: 0x80401040,\n\t            0x8000: 0x80001040,\n\t            0x18000: 0x40,\n\t            0x28000: 0x80400040,\n\t            0x38000: 0x80001000,\n\t            0x48000: 0x401000,\n\t            0x58000: 0x80401040,\n\t            0x68000: 0x0,\n\t            0x78000: 0x80400000,\n\t            0x88000: 0x1000,\n\t            0x98000: 0x80401000,\n\t            0xa8000: 0x400000,\n\t            0xb8000: 0x1040,\n\t            0xc8000: 0x80000000,\n\t            0xd8000: 0x400040,\n\t            0xe8000: 0x401040,\n\t            0xf8000: 0x80000040,\n\t            0x100000: 0x400040,\n\t            0x110000: 0x401000,\n\t            0x120000: 0x80000040,\n\t            0x130000: 0x0,\n\t            0x140000: 0x1040,\n\t            0x150000: 0x80400040,\n\t            0x160000: 0x80401000,\n\t            0x170000: 0x80001040,\n\t            0x180000: 0x80401040,\n\t            0x190000: 0x80000000,\n\t            0x1a0000: 0x80400000,\n\t            0x1b0000: 0x401040,\n\t            0x1c0000: 0x80001000,\n\t            0x1d0000: 0x400000,\n\t            0x1e0000: 0x40,\n\t            0x1f0000: 0x1000,\n\t            0x108000: 0x80400000,\n\t            0x118000: 0x80401040,\n\t            0x128000: 0x0,\n\t            0x138000: 0x401000,\n\t            0x148000: 0x400040,\n\t            0x158000: 0x80000000,\n\t            0x168000: 0x80001040,\n\t            0x178000: 0x40,\n\t            0x188000: 0x80000040,\n\t            0x198000: 0x1000,\n\t            0x1a8000: 0x80001000,\n\t            0x1b8000: 0x80400040,\n\t            0x1c8000: 0x1040,\n\t            0x1d8000: 0x80401000,\n\t            0x1e8000: 0x400000,\n\t            0x1f8000: 0x401040\n\t        },\n\t        {\n\t            0x0: 0x80,\n\t            0x1000: 0x1040000,\n\t            0x2000: 0x40000,\n\t            0x3000: 0x20000000,\n\t            0x4000: 0x20040080,\n\t            0x5000: 0x1000080,\n\t            0x6000: 0x21000080,\n\t            0x7000: 0x40080,\n\t            0x8000: 0x1000000,\n\t            0x9000: 0x20040000,\n\t            0xa000: 0x20000080,\n\t            0xb000: 0x21040080,\n\t            0xc000: 0x21040000,\n\t            0xd000: 0x0,\n\t            0xe000: 0x1040080,\n\t            0xf000: 0x21000000,\n\t            0x800: 0x1040080,\n\t            0x1800: 0x21000080,\n\t            0x2800: 0x80,\n\t            0x3800: 0x1040000,\n\t            0x4800: 0x40000,\n\t            0x5800: 0x20040080,\n\t            0x6800: 0x21040000,\n\t            0x7800: 0x20000000,\n\t            0x8800: 0x20040000,\n\t            0x9800: 0x0,\n\t            0xa800: 0x21040080,\n\t            0xb800: 0x1000080,\n\t            0xc800: 0x20000080,\n\t            0xd800: 0x21000000,\n\t            0xe800: 0x1000000,\n\t            0xf800: 0x40080,\n\t            0x10000: 0x40000,\n\t            0x11000: 0x80,\n\t            0x12000: 0x20000000,\n\t            0x13000: 0x21000080,\n\t            0x14000: 0x1000080,\n\t            0x15000: 0x21040000,\n\t            0x16000: 0x20040080,\n\t            0x17000: 0x1000000,\n\t            0x18000: 0x21040080,\n\t            0x19000: 0x21000000,\n\t            0x1a000: 0x1040000,\n\t            0x1b000: 0x20040000,\n\t            0x1c000: 0x40080,\n\t            0x1d000: 0x20000080,\n\t            0x1e000: 0x0,\n\t            0x1f000: 0x1040080,\n\t            0x10800: 0x21000080,\n\t            0x11800: 0x1000000,\n\t            0x12800: 0x1040000,\n\t            0x13800: 0x20040080,\n\t            0x14800: 0x20000000,\n\t            0x15800: 0x1040080,\n\t            0x16800: 0x80,\n\t            0x17800: 0x21040000,\n\t            0x18800: 0x40080,\n\t            0x19800: 0x21040080,\n\t            0x1a800: 0x0,\n\t            0x1b800: 0x21000000,\n\t            0x1c800: 0x1000080,\n\t            0x1d800: 0x40000,\n\t            0x1e800: 0x20040000,\n\t            0x1f800: 0x20000080\n\t        },\n\t        {\n\t            0x0: 0x10000008,\n\t            0x100: 0x2000,\n\t            0x200: 0x10200000,\n\t            0x300: 0x10202008,\n\t            0x400: 0x10002000,\n\t            0x500: 0x200000,\n\t            0x600: 0x200008,\n\t            0x700: 0x10000000,\n\t            0x800: 0x0,\n\t            0x900: 0x10002008,\n\t            0xa00: 0x202000,\n\t            0xb00: 0x8,\n\t            0xc00: 0x10200008,\n\t            0xd00: 0x202008,\n\t            0xe00: 0x2008,\n\t            0xf00: 0x10202000,\n\t            0x80: 0x10200000,\n\t            0x180: 0x10202008,\n\t            0x280: 0x8,\n\t            0x380: 0x200000,\n\t            0x480: 0x202008,\n\t            0x580: 0x10000008,\n\t            0x680: 0x10002000,\n\t            0x780: 0x2008,\n\t            0x880: 0x200008,\n\t            0x980: 0x2000,\n\t            0xa80: 0x10002008,\n\t            0xb80: 0x10200008,\n\t            0xc80: 0x0,\n\t            0xd80: 0x10202000,\n\t            0xe80: 0x202000,\n\t            0xf80: 0x10000000,\n\t            0x1000: 0x10002000,\n\t            0x1100: 0x10200008,\n\t            0x1200: 0x10202008,\n\t            0x1300: 0x2008,\n\t            0x1400: 0x200000,\n\t            0x1500: 0x10000000,\n\t            0x1600: 0x10000008,\n\t            0x1700: 0x202000,\n\t            0x1800: 0x202008,\n\t            0x1900: 0x0,\n\t            0x1a00: 0x8,\n\t            0x1b00: 0x10200000,\n\t            0x1c00: 0x2000,\n\t            0x1d00: 0x10002008,\n\t            0x1e00: 0x10202000,\n\t            0x1f00: 0x200008,\n\t            0x1080: 0x8,\n\t            0x1180: 0x202000,\n\t            0x1280: 0x200000,\n\t            0x1380: 0x10000008,\n\t            0x1480: 0x10002000,\n\t            0x1580: 0x2008,\n\t            0x1680: 0x10202008,\n\t            0x1780: 0x10200000,\n\t            0x1880: 0x10202000,\n\t            0x1980: 0x10200008,\n\t            0x1a80: 0x2000,\n\t            0x1b80: 0x202008,\n\t            0x1c80: 0x200008,\n\t            0x1d80: 0x0,\n\t            0x1e80: 0x10000000,\n\t            0x1f80: 0x10002008\n\t        },\n\t        {\n\t            0x0: 0x100000,\n\t            0x10: 0x2000401,\n\t            0x20: 0x400,\n\t            0x30: 0x100401,\n\t            0x40: 0x2100401,\n\t            0x50: 0x0,\n\t            0x60: 0x1,\n\t            0x70: 0x2100001,\n\t            0x80: 0x2000400,\n\t            0x90: 0x100001,\n\t            0xa0: 0x2000001,\n\t            0xb0: 0x2100400,\n\t            0xc0: 0x2100000,\n\t            0xd0: 0x401,\n\t            0xe0: 0x100400,\n\t            0xf0: 0x2000000,\n\t            0x8: 0x2100001,\n\t            0x18: 0x0,\n\t            0x28: 0x2000401,\n\t            0x38: 0x2100400,\n\t            0x48: 0x100000,\n\t            0x58: 0x2000001,\n\t            0x68: 0x2000000,\n\t            0x78: 0x401,\n\t            0x88: 0x100401,\n\t            0x98: 0x2000400,\n\t            0xa8: 0x2100000,\n\t            0xb8: 0x100001,\n\t            0xc8: 0x400,\n\t            0xd8: 0x2100401,\n\t            0xe8: 0x1,\n\t            0xf8: 0x100400,\n\t            0x100: 0x2000000,\n\t            0x110: 0x100000,\n\t            0x120: 0x2000401,\n\t            0x130: 0x2100001,\n\t            0x140: 0x100001,\n\t            0x150: 0x2000400,\n\t            0x160: 0x2100400,\n\t            0x170: 0x100401,\n\t            0x180: 0x401,\n\t            0x190: 0x2100401,\n\t            0x1a0: 0x100400,\n\t            0x1b0: 0x1,\n\t            0x1c0: 0x0,\n\t            0x1d0: 0x2100000,\n\t            0x1e0: 0x2000001,\n\t            0x1f0: 0x400,\n\t            0x108: 0x100400,\n\t            0x118: 0x2000401,\n\t            0x128: 0x2100001,\n\t            0x138: 0x1,\n\t            0x148: 0x2000000,\n\t            0x158: 0x100000,\n\t            0x168: 0x401,\n\t            0x178: 0x2100400,\n\t            0x188: 0x2000001,\n\t            0x198: 0x2100000,\n\t            0x1a8: 0x0,\n\t            0x1b8: 0x2100401,\n\t            0x1c8: 0x100401,\n\t            0x1d8: 0x400,\n\t            0x1e8: 0x2000400,\n\t            0x1f8: 0x100001\n\t        },\n\t        {\n\t            0x0: 0x8000820,\n\t            0x1: 0x20000,\n\t            0x2: 0x8000000,\n\t            0x3: 0x20,\n\t            0x4: 0x20020,\n\t            0x5: 0x8020820,\n\t            0x6: 0x8020800,\n\t            0x7: 0x800,\n\t            0x8: 0x8020000,\n\t            0x9: 0x8000800,\n\t            0xa: 0x20800,\n\t            0xb: 0x8020020,\n\t            0xc: 0x820,\n\t            0xd: 0x0,\n\t            0xe: 0x8000020,\n\t            0xf: 0x20820,\n\t            0x80000000: 0x800,\n\t            0x80000001: 0x8020820,\n\t            0x80000002: 0x8000820,\n\t            0x80000003: 0x8000000,\n\t            0x80000004: 0x8020000,\n\t            0x80000005: 0x20800,\n\t            0x80000006: 0x20820,\n\t            0x80000007: 0x20,\n\t            0x80000008: 0x8000020,\n\t            0x80000009: 0x820,\n\t            0x8000000a: 0x20020,\n\t            0x8000000b: 0x8020800,\n\t            0x8000000c: 0x0,\n\t            0x8000000d: 0x8020020,\n\t            0x8000000e: 0x8000800,\n\t            0x8000000f: 0x20000,\n\t            0x10: 0x20820,\n\t            0x11: 0x8020800,\n\t            0x12: 0x20,\n\t            0x13: 0x800,\n\t            0x14: 0x8000800,\n\t            0x15: 0x8000020,\n\t            0x16: 0x8020020,\n\t            0x17: 0x20000,\n\t            0x18: 0x0,\n\t            0x19: 0x20020,\n\t            0x1a: 0x8020000,\n\t            0x1b: 0x8000820,\n\t            0x1c: 0x8020820,\n\t            0x1d: 0x20800,\n\t            0x1e: 0x820,\n\t            0x1f: 0x8000000,\n\t            0x80000010: 0x20000,\n\t            0x80000011: 0x800,\n\t            0x80000012: 0x8020020,\n\t            0x80000013: 0x20820,\n\t            0x80000014: 0x20,\n\t            0x80000015: 0x8020000,\n\t            0x80000016: 0x8000000,\n\t            0x80000017: 0x8000820,\n\t            0x80000018: 0x8020820,\n\t            0x80000019: 0x8000020,\n\t            0x8000001a: 0x8000800,\n\t            0x8000001b: 0x0,\n\t            0x8000001c: 0x20800,\n\t            0x8000001d: 0x820,\n\t            0x8000001e: 0x20020,\n\t            0x8000001f: 0x8020800\n\t        }\n\t    ];\n\n\t    // Masks that select the SBOX input\n\t    var SBOX_MASK = [\n\t        0xf8000001, 0x1f800000, 0x01f80000, 0x001f8000,\n\t        0x0001f800, 0x00001f80, 0x000001f8, 0x8000001f\n\t    ];\n\n\t    /**\n\t     * DES block cipher algorithm.\n\t     */\n\t    var DES = C_algo.DES = BlockCipher.extend({\n\t        _doReset: function () {\n\t            // Shortcuts\n\t            var key = this._key;\n\t            var keyWords = key.words;\n\n\t            // Select 56 bits according to PC1\n\t            var keyBits = [];\n\t            for (var i = 0; i < 56; i++) {\n\t                var keyBitPos = PC1[i] - 1;\n\t                keyBits[i] = (keyWords[keyBitPos >>> 5] >>> (31 - keyBitPos % 32)) & 1;\n\t            }\n\n\t            // Assemble 16 subkeys\n\t            var subKeys = this._subKeys = [];\n\t            for (var nSubKey = 0; nSubKey < 16; nSubKey++) {\n\t                // Create subkey\n\t                var subKey = subKeys[nSubKey] = [];\n\n\t                // Shortcut\n\t                var bitShift = BIT_SHIFTS[nSubKey];\n\n\t                // Select 48 bits according to PC2\n\t                for (var i = 0; i < 24; i++) {\n\t                    // Select from the left 28 key bits\n\t                    subKey[(i / 6) | 0] |= keyBits[((PC2[i] - 1) + bitShift) % 28] << (31 - i % 6);\n\n\t                    // Select from the right 28 key bits\n\t                    subKey[4 + ((i / 6) | 0)] |= keyBits[28 + (((PC2[i + 24] - 1) + bitShift) % 28)] << (31 - i % 6);\n\t                }\n\n\t                // Since each subkey is applied to an expanded 32-bit input,\n\t                // the subkey can be broken into 8 values scaled to 32-bits,\n\t                // which allows the key to be used without expansion\n\t                subKey[0] = (subKey[0] << 1) | (subKey[0] >>> 31);\n\t                for (var i = 1; i < 7; i++) {\n\t                    subKey[i] = subKey[i] >>> ((i - 1) * 4 + 3);\n\t                }\n\t                subKey[7] = (subKey[7] << 5) | (subKey[7] >>> 27);\n\t            }\n\n\t            // Compute inverse subkeys\n\t            var invSubKeys = this._invSubKeys = [];\n\t            for (var i = 0; i < 16; i++) {\n\t                invSubKeys[i] = subKeys[15 - i];\n\t            }\n\t        },\n\n\t        encryptBlock: function (M, offset) {\n\t            this._doCryptBlock(M, offset, this._subKeys);\n\t        },\n\n\t        decryptBlock: function (M, offset) {\n\t            this._doCryptBlock(M, offset, this._invSubKeys);\n\t        },\n\n\t        _doCryptBlock: function (M, offset, subKeys) {\n\t            // Get input\n\t            this._lBlock = M[offset];\n\t            this._rBlock = M[offset + 1];\n\n\t            // Initial permutation\n\t            exchangeLR.call(this, 4,  0x0f0f0f0f);\n\t            exchangeLR.call(this, 16, 0x0000ffff);\n\t            exchangeRL.call(this, 2,  0x33333333);\n\t            exchangeRL.call(this, 8,  0x00ff00ff);\n\t            exchangeLR.call(this, 1,  0x55555555);\n\n\t            // Rounds\n\t            for (var round = 0; round < 16; round++) {\n\t                // Shortcuts\n\t                var subKey = subKeys[round];\n\t                var lBlock = this._lBlock;\n\t                var rBlock = this._rBlock;\n\n\t                // Feistel function\n\t                var f = 0;\n\t                for (var i = 0; i < 8; i++) {\n\t                    f |= SBOX_P[i][((rBlock ^ subKey[i]) & SBOX_MASK[i]) >>> 0];\n\t                }\n\t                this._lBlock = rBlock;\n\t                this._rBlock = lBlock ^ f;\n\t            }\n\n\t            // Undo swap from last round\n\t            var t = this._lBlock;\n\t            this._lBlock = this._rBlock;\n\t            this._rBlock = t;\n\n\t            // Final permutation\n\t            exchangeLR.call(this, 1,  0x55555555);\n\t            exchangeRL.call(this, 8,  0x00ff00ff);\n\t            exchangeRL.call(this, 2,  0x33333333);\n\t            exchangeLR.call(this, 16, 0x0000ffff);\n\t            exchangeLR.call(this, 4,  0x0f0f0f0f);\n\n\t            // Set output\n\t            M[offset] = this._lBlock;\n\t            M[offset + 1] = this._rBlock;\n\t        },\n\n\t        keySize: 64/32,\n\n\t        ivSize: 64/32,\n\n\t        blockSize: 64/32\n\t    });\n\n\t    // Swap bits across the left and right words\n\t    function exchangeLR(offset, mask) {\n\t        var t = ((this._lBlock >>> offset) ^ this._rBlock) & mask;\n\t        this._rBlock ^= t;\n\t        this._lBlock ^= t << offset;\n\t    }\n\n\t    function exchangeRL(offset, mask) {\n\t        var t = ((this._rBlock >>> offset) ^ this._lBlock) & mask;\n\t        this._lBlock ^= t;\n\t        this._rBlock ^= t << offset;\n\t    }\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.DES.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.DES.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.DES = BlockCipher._createHelper(DES);\n\n\t    /**\n\t     * Triple-DES block cipher algorithm.\n\t     */\n\t    var TripleDES = C_algo.TripleDES = BlockCipher.extend({\n\t        _doReset: function () {\n\t            // Shortcuts\n\t            var key = this._key;\n\t            var keyWords = key.words;\n\t            // Make sure the key length is valid (64, 128 or >= 192 bit)\n\t            if (keyWords.length !== 2 && keyWords.length !== 4 && keyWords.length < 6) {\n\t                throw new Error('Invalid key length - 3DES requires the key length to be 64, 128, 192 or >192.');\n\t            }\n\n\t            // Extend the key according to the keying options defined in 3DES standard\n\t            var key1 = keyWords.slice(0, 2);\n\t            var key2 = keyWords.length < 4 ? keyWords.slice(0, 2) : keyWords.slice(2, 4);\n\t            var key3 = keyWords.length < 6 ? keyWords.slice(0, 2) : keyWords.slice(4, 6);\n\n\t            // Create DES instances\n\t            this._des1 = DES.createEncryptor(WordArray.create(key1));\n\t            this._des2 = DES.createEncryptor(WordArray.create(key2));\n\t            this._des3 = DES.createEncryptor(WordArray.create(key3));\n\t        },\n\n\t        encryptBlock: function (M, offset) {\n\t            this._des1.encryptBlock(M, offset);\n\t            this._des2.decryptBlock(M, offset);\n\t            this._des3.encryptBlock(M, offset);\n\t        },\n\n\t        decryptBlock: function (M, offset) {\n\t            this._des3.decryptBlock(M, offset);\n\t            this._des2.encryptBlock(M, offset);\n\t            this._des1.decryptBlock(M, offset);\n\t        },\n\n\t        keySize: 192/32,\n\n\t        ivSize: 64/32,\n\n\t        blockSize: 64/32\n\t    });\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.TripleDES.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.TripleDES.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.TripleDES = BlockCipher._createHelper(TripleDES);\n\t}());\n\n\n\treturn CryptoJS.TripleDES;\n\n}));","var userAgent = require('../internals/engine-user-agent');\n\nmodule.exports = /web0s(?!.*chrome)/i.test(userAgent);\n","'use strict';\nvar $ = require('../internals/export');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar IS_PURE = require('../internals/is-pure');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\nvar fails = require('../internals/fails');\nvar has = require('../internals/has');\nvar isArray = require('../internals/is-array');\nvar isObject = require('../internals/is-object');\nvar anObject = require('../internals/an-object');\nvar toObject = require('../internals/to-object');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar toPrimitive = require('../internals/to-primitive');\nvar createPropertyDescriptor = require('../internals/create-property-descriptor');\nvar nativeObjectCreate = require('../internals/object-create');\nvar objectKeys = require('../internals/object-keys');\nvar getOwnPropertyNamesModule = require('../internals/object-get-own-property-names');\nvar getOwnPropertyNamesExternal = require('../internals/object-get-own-property-names-external');\nvar getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\nvar propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar redefine = require('../internals/redefine');\nvar shared = require('../internals/shared');\nvar sharedKey = require('../internals/shared-key');\nvar hiddenKeys = require('../internals/hidden-keys');\nvar uid = require('../internals/uid');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar wrappedWellKnownSymbolModule = require('../internals/well-known-symbol-wrapped');\nvar defineWellKnownSymbol = require('../internals/define-well-known-symbol');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar InternalStateModule = require('../internals/internal-state');\nvar $forEach = require('../internals/array-iteration').forEach;\n\nvar HIDDEN = sharedKey('hidden');\nvar SYMBOL = 'Symbol';\nvar PROTOTYPE = 'prototype';\nvar TO_PRIMITIVE = wellKnownSymbol('toPrimitive');\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(SYMBOL);\nvar ObjectPrototype = Object[PROTOTYPE];\nvar $Symbol = global.Symbol;\nvar $stringify = getBuiltIn('JSON', 'stringify');\nvar nativeGetOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\nvar nativeDefineProperty = definePropertyModule.f;\nvar nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;\nvar nativePropertyIsEnumerable = propertyIsEnumerableModule.f;\nvar AllSymbols = shared('symbols');\nvar ObjectPrototypeSymbols = shared('op-symbols');\nvar StringToSymbolRegistry = shared('string-to-symbol-registry');\nvar SymbolToStringRegistry = shared('symbol-to-string-registry');\nvar WellKnownSymbolsStore = shared('wks');\nvar QObject = global.QObject;\n// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173\nvar USE_SETTER = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild;\n\n// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687\nvar setSymbolDescriptor = DESCRIPTORS && fails(function () {\n  return nativeObjectCreate(nativeDefineProperty({}, 'a', {\n    get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }\n  })).a != 7;\n}) ? function (O, P, Attributes) {\n  var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor(ObjectPrototype, P);\n  if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];\n  nativeDefineProperty(O, P, Attributes);\n  if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {\n    nativeDefineProperty(ObjectPrototype, P, ObjectPrototypeDescriptor);\n  }\n} : nativeDefineProperty;\n\nvar wrap = function (tag, description) {\n  var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE]);\n  setInternalState(symbol, {\n    type: SYMBOL,\n    tag: tag,\n    description: description\n  });\n  if (!DESCRIPTORS) symbol.description = description;\n  return symbol;\n};\n\nvar isSymbol = USE_SYMBOL_AS_UID ? function (it) {\n  return typeof it == 'symbol';\n} : function (it) {\n  return Object(it) instanceof $Symbol;\n};\n\nvar $defineProperty = function defineProperty(O, P, Attributes) {\n  if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);\n  anObject(O);\n  var key = toPrimitive(P, true);\n  anObject(Attributes);\n  if (has(AllSymbols, key)) {\n    if (!Attributes.enumerable) {\n      if (!has(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));\n      O[HIDDEN][key] = true;\n    } else {\n      if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;\n      Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });\n    } return setSymbolDescriptor(O, key, Attributes);\n  } return nativeDefineProperty(O, key, Attributes);\n};\n\nvar $defineProperties = function defineProperties(O, Properties) {\n  anObject(O);\n  var properties = toIndexedObject(Properties);\n  var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));\n  $forEach(keys, function (key) {\n    if (!DESCRIPTORS || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);\n  });\n  return O;\n};\n\nvar $create = function create(O, Properties) {\n  return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);\n};\n\nvar $propertyIsEnumerable = function propertyIsEnumerable(V) {\n  var P = toPrimitive(V, true);\n  var enumerable = nativePropertyIsEnumerable.call(this, P);\n  if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;\n  return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;\n};\n\nvar $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {\n  var it = toIndexedObject(O);\n  var key = toPrimitive(P, true);\n  if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;\n  var descriptor = nativeGetOwnPropertyDescriptor(it, key);\n  if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {\n    descriptor.enumerable = true;\n  }\n  return descriptor;\n};\n\nvar $getOwnPropertyNames = function getOwnPropertyNames(O) {\n  var names = nativeGetOwnPropertyNames(toIndexedObject(O));\n  var result = [];\n  $forEach(names, function (key) {\n    if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);\n  });\n  return result;\n};\n\nvar $getOwnPropertySymbols = function getOwnPropertySymbols(O) {\n  var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;\n  var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));\n  var result = [];\n  $forEach(names, function (key) {\n    if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {\n      result.push(AllSymbols[key]);\n    }\n  });\n  return result;\n};\n\n// `Symbol` constructor\n// https://tc39.es/ecma262/#sec-symbol-constructor\nif (!NATIVE_SYMBOL) {\n  $Symbol = function Symbol() {\n    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');\n    var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);\n    var tag = uid(description);\n    var setter = function (value) {\n      if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);\n      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;\n      setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));\n    };\n    if (DESCRIPTORS && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });\n    return wrap(tag, description);\n  };\n\n  redefine($Symbol[PROTOTYPE], 'toString', function toString() {\n    return getInternalState(this).tag;\n  });\n\n  redefine($Symbol, 'withoutSetter', function (description) {\n    return wrap(uid(description), description);\n  });\n\n  propertyIsEnumerableModule.f = $propertyIsEnumerable;\n  definePropertyModule.f = $defineProperty;\n  getOwnPropertyDescriptorModule.f = $getOwnPropertyDescriptor;\n  getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;\n  getOwnPropertySymbolsModule.f = $getOwnPropertySymbols;\n\n  wrappedWellKnownSymbolModule.f = function (name) {\n    return wrap(wellKnownSymbol(name), name);\n  };\n\n  if (DESCRIPTORS) {\n    // https://github.com/tc39/proposal-Symbol-description\n    nativeDefineProperty($Symbol[PROTOTYPE], 'description', {\n      configurable: true,\n      get: function description() {\n        return getInternalState(this).description;\n      }\n    });\n    if (!IS_PURE) {\n      redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });\n    }\n  }\n}\n\n$({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {\n  Symbol: $Symbol\n});\n\n$forEach(objectKeys(WellKnownSymbolsStore), function (name) {\n  defineWellKnownSymbol(name);\n});\n\n$({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {\n  // `Symbol.for` method\n  // https://tc39.es/ecma262/#sec-symbol.for\n  'for': function (key) {\n    var string = String(key);\n    if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];\n    var symbol = $Symbol(string);\n    StringToSymbolRegistry[string] = symbol;\n    SymbolToStringRegistry[symbol] = string;\n    return symbol;\n  },\n  // `Symbol.keyFor` method\n  // https://tc39.es/ecma262/#sec-symbol.keyfor\n  keyFor: function keyFor(sym) {\n    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');\n    if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];\n  },\n  useSetter: function () { USE_SETTER = true; },\n  useSimple: function () { USE_SETTER = false; }\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS }, {\n  // `Object.create` method\n  // https://tc39.es/ecma262/#sec-object.create\n  create: $create,\n  // `Object.defineProperty` method\n  // https://tc39.es/ecma262/#sec-object.defineproperty\n  defineProperty: $defineProperty,\n  // `Object.defineProperties` method\n  // https://tc39.es/ecma262/#sec-object.defineproperties\n  defineProperties: $defineProperties,\n  // `Object.getOwnPropertyDescriptor` method\n  // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors\n  getOwnPropertyDescriptor: $getOwnPropertyDescriptor\n});\n\n$({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {\n  // `Object.getOwnPropertyNames` method\n  // https://tc39.es/ecma262/#sec-object.getownpropertynames\n  getOwnPropertyNames: $getOwnPropertyNames,\n  // `Object.getOwnPropertySymbols` method\n  // https://tc39.es/ecma262/#sec-object.getownpropertysymbols\n  getOwnPropertySymbols: $getOwnPropertySymbols\n});\n\n// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives\n// https://bugs.chromium.org/p/v8/issues/detail?id=3443\n$({ target: 'Object', stat: true, forced: fails(function () { getOwnPropertySymbolsModule.f(1); }) }, {\n  getOwnPropertySymbols: function getOwnPropertySymbols(it) {\n    return getOwnPropertySymbolsModule.f(toObject(it));\n  }\n});\n\n// `JSON.stringify` method behavior with symbols\n// https://tc39.es/ecma262/#sec-json.stringify\nif ($stringify) {\n  var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails(function () {\n    var symbol = $Symbol();\n    // MS Edge converts symbol values to JSON as {}\n    return $stringify([symbol]) != '[null]'\n      // WebKit converts symbol values to JSON as null\n      || $stringify({ a: symbol }) != '{}'\n      // V8 throws on boxed symbols\n      || $stringify(Object(symbol)) != '{}';\n  });\n\n  $({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {\n    // eslint-disable-next-line no-unused-vars -- required for `.length`\n    stringify: function stringify(it, replacer, space) {\n      var args = [it];\n      var index = 1;\n      var $replacer;\n      while (arguments.length > index) args.push(arguments[index++]);\n      $replacer = replacer;\n      if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined\n      if (!isArray(replacer)) replacer = function (key, value) {\n        if (typeof $replacer == 'function') value = $replacer.call(this, key, value);\n        if (!isSymbol(value)) return value;\n      };\n      args[1] = replacer;\n      return $stringify.apply(null, args);\n    }\n  });\n}\n\n// `Symbol.prototype[@@toPrimitive]` method\n// https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive\nif (!$Symbol[PROTOTYPE][TO_PRIMITIVE]) {\n  createNonEnumerableProperty($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);\n}\n// `Symbol.prototype[@@toStringTag]` property\n// https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag\nsetToStringTag($Symbol, SYMBOL);\n\nhiddenKeys[HIDDEN] = true;\n","function _extends() {\n  module.exports = _extends = Object.assign || function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n\n    return target;\n  };\n\n  module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  return _extends.apply(this, arguments);\n}\n\nmodule.exports = _extends;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","var win;\n\nif (typeof window !== \"undefined\") {\n    win = window;\n} else if (typeof global !== \"undefined\") {\n    win = global;\n} else if (typeof self !== \"undefined\"){\n    win = self;\n} else {\n    win = {};\n}\n\nmodule.exports = win;\n","var $ = require('../internals/export');\nvar from = require('../internals/array-from');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\n\nvar INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {\n  // eslint-disable-next-line es/no-array-from -- required for testing\n  Array.from(iterable);\n});\n\n// `Array.from` method\n// https://tc39.es/ecma262/#sec-array.from\n$({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {\n  from: from\n});\n","'use strict';\nvar fails = require('../internals/fails');\n\nmodule.exports = function (METHOD_NAME, argument) {\n  var method = [][METHOD_NAME];\n  return !!method && fails(function () {\n    // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing\n    method.call(null, argument || function () { throw 1; }, 1);\n  });\n};\n","/**\n * @file flash-transmuxer-worker.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _muxJsLibFlv = require('mux.js/lib/flv');\n\nvar _muxJsLibFlv2 = _interopRequireDefault(_muxJsLibFlv);\n\n/**\n * Re-emits transmuxer events by converting them into messages to the\n * world outside the worker.\n *\n * @param {Object} transmuxer the transmuxer to wire events on\n * @private\n */\nvar wireTransmuxerEvents = function wireTransmuxerEvents(transmuxer) {\n  transmuxer.on('data', function (segment) {\n    _globalWindow2['default'].postMessage({\n      action: 'data',\n      segment: segment\n    });\n  });\n\n  transmuxer.on('done', function (data) {\n    _globalWindow2['default'].postMessage({ action: 'done' });\n  });\n};\n\n/**\n * All incoming messages route through this hash. If no function exists\n * to handle an incoming message, then we ignore the message.\n *\n * @class MessageHandlers\n * @param {Object} options the options to initialize with\n */\n\nvar MessageHandlers = (function () {\n  function MessageHandlers(options) {\n    _classCallCheck(this, MessageHandlers);\n\n    this.options = options || {};\n    this.init();\n  }\n\n  /**\n   * Our web wroker interface so that things can talk to mux.js\n   * that will be running in a web worker. The scope is passed to this by\n   * webworkify.\n   *\n   * @param {Object} self the scope for the web worker\n   */\n\n  /**\n   * initialize our web worker and wire all the events.\n   */\n\n  _createClass(MessageHandlers, [{\n    key: 'init',\n    value: function init() {\n      if (this.transmuxer) {\n        this.transmuxer.dispose();\n      }\n      this.transmuxer = new _muxJsLibFlv2['default'].Transmuxer(this.options);\n      wireTransmuxerEvents(this.transmuxer);\n    }\n\n    /**\n     * Adds data (a ts segment) to the start of the transmuxer pipeline for\n     * processing.\n     *\n     * @param {ArrayBuffer} data data to push into the muxer\n     */\n  }, {\n    key: 'push',\n    value: function push(data) {\n      // Cast array buffer to correct type for transmuxer\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n\n      this.transmuxer.push(segment);\n    }\n\n    /**\n     * Recreate the transmuxer so that the next segment added via `push`\n     * start with a fresh transmuxer.\n     */\n  }, {\n    key: 'reset',\n    value: function reset() {\n      this.init();\n    }\n\n    /**\n     * Forces the pipeline to finish processing the last segment and emit its\n     * results.\n     */\n  }, {\n    key: 'flush',\n    value: function flush() {\n      this.transmuxer.flush();\n    }\n  }, {\n    key: 'resetCaptions',\n    value: function resetCaptions() {\n      this.transmuxer.resetCaptions();\n    }\n  }]);\n\n  return MessageHandlers;\n})();\n\nvar FlashTransmuxerWorker = function FlashTransmuxerWorker(self) {\n  self.onmessage = function (event) {\n    if (event.data.action === 'init' && event.data.options) {\n      this.messageHandlers = new MessageHandlers(event.data.options);\n      return;\n    }\n\n    if (!this.messageHandlers) {\n      this.messageHandlers = new MessageHandlers();\n    }\n\n    if (event.data && event.data.action && event.data.action !== 'init') {\n      if (this.messageHandlers[event.data.action]) {\n        this.messageHandlers[event.data.action](event.data);\n      }\n    }\n  };\n};\n\nexports['default'] = function (self) {\n  return new FlashTransmuxerWorker(self);\n};\n\nmodule.exports = exports['default'];","'use strict';\n\nvar Stream = require('../utils/stream.js');\n\nvar AdtsStream;\n\nvar\n  ADTS_SAMPLING_FREQUENCIES = [\n    96000,\n    88200,\n    64000,\n    48000,\n    44100,\n    32000,\n    24000,\n    22050,\n    16000,\n    12000,\n    11025,\n    8000,\n    7350\n  ];\n\n/*\n * Accepts a ElementaryStream and emits data events with parsed\n * AAC Audio Frames of the individual packets. Input audio in ADTS\n * format is unpacked and re-emitted as AAC frames.\n *\n * @see http://wiki.multimedia.cx/index.php?title=ADTS\n * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n */\nAdtsStream = function() {\n  var buffer;\n\n  AdtsStream.prototype.init.call(this);\n\n  this.push = function(packet) {\n    var\n      i = 0,\n      frameNum = 0,\n      frameLength,\n      protectionSkipBytes,\n      frameEnd,\n      oldBuffer,\n      sampleCount,\n      adtsFrameDuration;\n\n    if (packet.type !== 'audio') {\n      // ignore non-audio data\n      return;\n    }\n\n    // Prepend any data in the buffer to the input data so that we can parse\n    // aac frames the cross a PES packet boundary\n    if (buffer) {\n      oldBuffer = buffer;\n      buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n      buffer.set(oldBuffer);\n      buffer.set(packet.data, oldBuffer.byteLength);\n    } else {\n      buffer = packet.data;\n    }\n\n    // unpack any ADTS frames which have been fully received\n    // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n    while (i + 5 < buffer.length) {\n\n      // Loook for the start of an ADTS header..\n      if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n        // If a valid header was not found,  jump one forward and attempt to\n        // find a valid ADTS header starting at the next byte\n        i++;\n        continue;\n      }\n\n      // The protection skip bit tells us if we have 2 bytes of CRC data at the\n      // end of the ADTS header\n      protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2;\n\n      // Frame length is a 13 bit integer starting 16 bits from the\n      // end of the sync sequence\n      frameLength = ((buffer[i + 3] & 0x03) << 11) |\n        (buffer[i + 4] << 3) |\n        ((buffer[i + 5] & 0xe0) >> 5);\n\n      sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n      adtsFrameDuration = (sampleCount * 90000) /\n        ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2];\n\n      frameEnd = i + frameLength;\n\n      // If we don't have enough data to actually finish this ADTS frame, return\n      // and wait for more data\n      if (buffer.byteLength < frameEnd) {\n        return;\n      }\n\n      // Otherwise, deliver the complete AAC frame\n      this.trigger('data', {\n        pts: packet.pts + (frameNum * adtsFrameDuration),\n        dts: packet.dts + (frameNum * adtsFrameDuration),\n        sampleCount: sampleCount,\n        audioobjecttype: ((buffer[i + 2] >>> 6) & 0x03) + 1,\n        channelcount: ((buffer[i + 2] & 1) << 2) |\n          ((buffer[i + 3] & 0xc0) >>> 6),\n        samplerate: ADTS_SAMPLING_FREQUENCIES[(buffer[i + 2] & 0x3c) >>> 2],\n        samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n        // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n        samplesize: 16,\n        data: buffer.subarray(i + 7 + protectionSkipBytes, frameEnd)\n      });\n\n      // If the buffer is empty, clear it and return\n      if (buffer.byteLength === frameEnd) {\n        buffer = undefined;\n        return;\n      }\n\n      frameNum++;\n\n      // Remove the finished frame from the buffer and start the process again\n      buffer = buffer.subarray(frameEnd);\n    }\n  };\n  this.flush = function() {\n    this.trigger('done');\n  };\n};\n\nAdtsStream.prototype = new Stream();\n\nmodule.exports = AdtsStream;\n","var ceil = Math.ceil;\nvar floor = Math.floor;\n\n// `ToInteger` abstract operation\n// https://tc39.es/ecma262/#sec-tointeger\nmodule.exports = function (argument) {\n  return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar NativePromise = require('../internals/native-promise-constructor');\nvar fails = require('../internals/fails');\nvar getBuiltIn = require('../internals/get-built-in');\nvar speciesConstructor = require('../internals/species-constructor');\nvar promiseResolve = require('../internals/promise-resolve');\nvar redefine = require('../internals/redefine');\n\n// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829\nvar NON_GENERIC = !!NativePromise && fails(function () {\n  NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });\n});\n\n// `Promise.prototype.finally` method\n// https://tc39.es/ecma262/#sec-promise.prototype.finally\n$({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {\n  'finally': function (onFinally) {\n    var C = speciesConstructor(this, getBuiltIn('Promise'));\n    var isFunction = typeof onFinally == 'function';\n    return this.then(\n      isFunction ? function (x) {\n        return promiseResolve(C, onFinally()).then(function () { return x; });\n      } : onFinally,\n      isFunction ? function (e) {\n        return promiseResolve(C, onFinally()).then(function () { throw e; });\n      } : onFinally\n    );\n  }\n});\n\n// patch native Promise.prototype for native async functions\nif (!IS_PURE && typeof NativePromise == 'function' && !NativePromise.prototype['finally']) {\n  redefine(NativePromise.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);\n}\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * ANSI X.923 padding strategy.\n\t */\n\tCryptoJS.pad.AnsiX923 = {\n\t    pad: function (data, blockSize) {\n\t        // Shortcuts\n\t        var dataSigBytes = data.sigBytes;\n\t        var blockSizeBytes = blockSize * 4;\n\n\t        // Count padding bytes\n\t        var nPaddingBytes = blockSizeBytes - dataSigBytes % blockSizeBytes;\n\n\t        // Compute last byte position\n\t        var lastBytePos = dataSigBytes + nPaddingBytes - 1;\n\n\t        // Pad\n\t        data.clamp();\n\t        data.words[lastBytePos >>> 2] |= nPaddingBytes << (24 - (lastBytePos % 4) * 8);\n\t        data.sigBytes += nPaddingBytes;\n\t    },\n\n\t    unpad: function (data) {\n\t        // Get number of padding bytes from last byte\n\t        var nPaddingBytes = data.words[(data.sigBytes - 1) >>> 2] & 0xff;\n\n\t        // Remove padding\n\t        data.sigBytes -= nPaddingBytes;\n\t    }\n\t};\n\n\n\treturn CryptoJS.pad.Ansix923;\n\n}));",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var C_enc = C.enc;\n\n\t    /**\n\t     * UTF-16 BE encoding strategy.\n\t     */\n\t    var Utf16BE = C_enc.Utf16 = C_enc.Utf16BE = {\n\t        /**\n\t         * Converts a word array to a UTF-16 BE string.\n\t         *\n\t         * @param {WordArray} wordArray The word array.\n\t         *\n\t         * @return {string} The UTF-16 BE string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var utf16String = CryptoJS.enc.Utf16.stringify(wordArray);\n\t         */\n\t        stringify: function (wordArray) {\n\t            // Shortcuts\n\t            var words = wordArray.words;\n\t            var sigBytes = wordArray.sigBytes;\n\n\t            // Convert\n\t            var utf16Chars = [];\n\t            for (var i = 0; i < sigBytes; i += 2) {\n\t                var codePoint = (words[i >>> 2] >>> (16 - (i % 4) * 8)) & 0xffff;\n\t                utf16Chars.push(String.fromCharCode(codePoint));\n\t            }\n\n\t            return utf16Chars.join('');\n\t        },\n\n\t        /**\n\t         * Converts a UTF-16 BE string to a word array.\n\t         *\n\t         * @param {string} utf16Str The UTF-16 BE string.\n\t         *\n\t         * @return {WordArray} The word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.enc.Utf16.parse(utf16String);\n\t         */\n\t        parse: function (utf16Str) {\n\t            // Shortcut\n\t            var utf16StrLength = utf16Str.length;\n\n\t            // Convert\n\t            var words = [];\n\t            for (var i = 0; i < utf16StrLength; i++) {\n\t                words[i >>> 1] |= utf16Str.charCodeAt(i) << (16 - (i % 2) * 16);\n\t            }\n\n\t            return WordArray.create(words, utf16StrLength * 2);\n\t        }\n\t    };\n\n\t    /**\n\t     * UTF-16 LE encoding strategy.\n\t     */\n\t    C_enc.Utf16LE = {\n\t        /**\n\t         * Converts a word array to a UTF-16 LE string.\n\t         *\n\t         * @param {WordArray} wordArray The word array.\n\t         *\n\t         * @return {string} The UTF-16 LE string.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var utf16Str = CryptoJS.enc.Utf16LE.stringify(wordArray);\n\t         */\n\t        stringify: function (wordArray) {\n\t            // Shortcuts\n\t            var words = wordArray.words;\n\t            var sigBytes = wordArray.sigBytes;\n\n\t            // Convert\n\t            var utf16Chars = [];\n\t            for (var i = 0; i < sigBytes; i += 2) {\n\t                var codePoint = swapEndian((words[i >>> 2] >>> (16 - (i % 4) * 8)) & 0xffff);\n\t                utf16Chars.push(String.fromCharCode(codePoint));\n\t            }\n\n\t            return utf16Chars.join('');\n\t        },\n\n\t        /**\n\t         * Converts a UTF-16 LE string to a word array.\n\t         *\n\t         * @param {string} utf16Str The UTF-16 LE string.\n\t         *\n\t         * @return {WordArray} The word array.\n\t         *\n\t         * @static\n\t         *\n\t         * @example\n\t         *\n\t         *     var wordArray = CryptoJS.enc.Utf16LE.parse(utf16Str);\n\t         */\n\t        parse: function (utf16Str) {\n\t            // Shortcut\n\t            var utf16StrLength = utf16Str.length;\n\n\t            // Convert\n\t            var words = [];\n\t            for (var i = 0; i < utf16StrLength; i++) {\n\t                words[i >>> 1] |= swapEndian(utf16Str.charCodeAt(i) << (16 - (i % 2) * 16));\n\t            }\n\n\t            return WordArray.create(words, utf16StrLength * 2);\n\t        }\n\t    };\n\n\t    function swapEndian(word) {\n\t        return ((word << 8) & 0xff00ff00) | ((word >>> 8) & 0x00ff00ff);\n\t    }\n\t}());\n\n\n\treturn CryptoJS.enc.Utf16;\n\n}));","var BN = require('bn.js')\nvar randomBytes = require('randombytes')\n\nfunction blind (priv) {\n  var r = getr(priv)\n  var blinder = r.toRed(BN.mont(priv.modulus)).redPow(new BN(priv.publicExponent)).fromRed()\n  return { blinder: blinder, unblinder: r.invm(priv.modulus) }\n}\n\nfunction getr (priv) {\n  var len = priv.modulus.byteLength()\n  var r\n  do {\n    r = new BN(randomBytes(len))\n  } while (r.cmp(priv.modulus) >= 0 || !r.umod(priv.prime1) || !r.umod(priv.prime2))\n  return r\n}\n\nfunction crt (msg, priv) {\n  var blinds = blind(priv)\n  var len = priv.modulus.byteLength()\n  var blinded = new BN(msg).mul(blinds.blinder).umod(priv.modulus)\n  var c1 = blinded.toRed(BN.mont(priv.prime1))\n  var c2 = blinded.toRed(BN.mont(priv.prime2))\n  var qinv = priv.coefficient\n  var p = priv.prime1\n  var q = priv.prime2\n  var m1 = c1.redPow(priv.exponent1).fromRed()\n  var m2 = c2.redPow(priv.exponent2).fromRed()\n  var h = m1.isub(m2).imul(qinv).umod(p).imul(q)\n  return m2.iadd(h).imul(blinds.unblinder).umod(priv.modulus).toArrayLike(Buffer, 'be', len)\n}\ncrt.getr = getr\n\nmodule.exports = crt\n","var MAX_UINT32 = Math.pow(2, 32);\n\nvar getUint64 = function(uint8) {\n  var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n  var value;\n\n  if (dv.getBigUint64) {\n    value = dv.getBigUint64(0);\n\n    if (value < Number.MAX_SAFE_INTEGER) {\n      return Number(value);\n    }\n\n    return value;\n  }\n\n  return (dv.getUint32(0) * MAX_UINT32) + dv.getUint32(4);\n};\n\nmodule.exports = {\n  getUint64: getUint64,\n  MAX_UINT32: MAX_UINT32\n};\n","'use strict';\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar isForced = require('../internals/is-forced');\nvar redefine = require('../internals/redefine');\nvar has = require('../internals/has');\nvar classof = require('../internals/classof-raw');\nvar inheritIfRequired = require('../internals/inherit-if-required');\nvar toPrimitive = require('../internals/to-primitive');\nvar fails = require('../internals/fails');\nvar create = require('../internals/object-create');\nvar getOwnPropertyNames = require('../internals/object-get-own-property-names').f;\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar defineProperty = require('../internals/object-define-property').f;\nvar trim = require('../internals/string-trim').trim;\n\nvar NUMBER = 'Number';\nvar NativeNumber = global[NUMBER];\nvar NumberPrototype = NativeNumber.prototype;\n\n// Opera ~12 has broken Object#toString\nvar BROKEN_CLASSOF = classof(create(NumberPrototype)) == NUMBER;\n\n// `ToNumber` abstract operation\n// https://tc39.es/ecma262/#sec-tonumber\nvar toNumber = function (argument) {\n  var it = toPrimitive(argument, false);\n  var first, third, radix, maxCode, digits, length, index, code;\n  if (typeof it == 'string' && it.length > 2) {\n    it = trim(it);\n    first = it.charCodeAt(0);\n    if (first === 43 || first === 45) {\n      third = it.charCodeAt(2);\n      if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix\n    } else if (first === 48) {\n      switch (it.charCodeAt(1)) {\n        case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i\n        case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i\n        default: return +it;\n      }\n      digits = it.slice(2);\n      length = digits.length;\n      for (index = 0; index < length; index++) {\n        code = digits.charCodeAt(index);\n        // parseInt parses a string to a first unavailable symbol\n        // but ToNumber should return NaN if a string contains unavailable symbols\n        if (code < 48 || code > maxCode) return NaN;\n      } return parseInt(digits, radix);\n    }\n  } return +it;\n};\n\n// `Number` constructor\n// https://tc39.es/ecma262/#sec-number-constructor\nif (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {\n  var NumberWrapper = function Number(value) {\n    var it = arguments.length < 1 ? 0 : value;\n    var dummy = this;\n    return dummy instanceof NumberWrapper\n      // check on 1..constructor(foo) case\n      && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classof(dummy) != NUMBER)\n        ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);\n  };\n  for (var keys = DESCRIPTORS ? getOwnPropertyNames(NativeNumber) : (\n    // ES3:\n    'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +\n    // ES2015 (in case, if modules with ES2015 Number statics required before):\n    'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +\n    'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +\n    // ESNext\n    'fromString,range'\n  ).split(','), j = 0, key; keys.length > j; j++) {\n    if (has(NativeNumber, key = keys[j]) && !has(NumberWrapper, key)) {\n      defineProperty(NumberWrapper, key, getOwnPropertyDescriptor(NativeNumber, key));\n    }\n  }\n  NumberWrapper.prototype = NumberPrototype;\n  NumberPrototype.constructor = NumberWrapper;\n  redefine(global, NUMBER, NumberWrapper);\n}\n","'use strict';\n\nvar utils = require('../utils');\nvar rotr32 = utils.rotr32;\n\nfunction ft_1(s, x, y, z) {\n  if (s === 0)\n    return ch32(x, y, z);\n  if (s === 1 || s === 3)\n    return p32(x, y, z);\n  if (s === 2)\n    return maj32(x, y, z);\n}\nexports.ft_1 = ft_1;\n\nfunction ch32(x, y, z) {\n  return (x & y) ^ ((~x) & z);\n}\nexports.ch32 = ch32;\n\nfunction maj32(x, y, z) {\n  return (x & y) ^ (x & z) ^ (y & z);\n}\nexports.maj32 = maj32;\n\nfunction p32(x, y, z) {\n  return x ^ y ^ z;\n}\nexports.p32 = p32;\n\nfunction s0_256(x) {\n  return rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22);\n}\nexports.s0_256 = s0_256;\n\nfunction s1_256(x) {\n  return rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25);\n}\nexports.s1_256 = s1_256;\n\nfunction g0_256(x) {\n  return rotr32(x, 7) ^ rotr32(x, 18) ^ (x >>> 3);\n}\nexports.g0_256 = g0_256;\n\nfunction g1_256(x) {\n  return rotr32(x, 17) ^ rotr32(x, 19) ^ (x >>> 10);\n}\nexports.g1_256 = g1_256;\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/** @preserve\n\t * Counter block mode compatible with  Dr Brian Gladman fileenc.c\n\t * derived from CryptoJS.mode.CTR\n\t * Jan Hruby jhruby.web@gmail.com\n\t */\n\tCryptoJS.mode.CTRGladman = (function () {\n\t    var CTRGladman = CryptoJS.lib.BlockCipherMode.extend();\n\n\t\tfunction incWord(word)\n\t\t{\n\t\t\tif (((word >> 24) & 0xff) === 0xff) { //overflow\n\t\t\tvar b1 = (word >> 16)&0xff;\n\t\t\tvar b2 = (word >> 8)&0xff;\n\t\t\tvar b3 = word & 0xff;\n\n\t\t\tif (b1 === 0xff) // overflow b1\n\t\t\t{\n\t\t\tb1 = 0;\n\t\t\tif (b2 === 0xff)\n\t\t\t{\n\t\t\t\tb2 = 0;\n\t\t\t\tif (b3 === 0xff)\n\t\t\t\t{\n\t\t\t\t\tb3 = 0;\n\t\t\t\t}\n\t\t\t\telse\n\t\t\t\t{\n\t\t\t\t\t++b3;\n\t\t\t\t}\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t\t++b2;\n\t\t\t}\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\t++b1;\n\t\t\t}\n\n\t\t\tword = 0;\n\t\t\tword += (b1 << 16);\n\t\t\tword += (b2 << 8);\n\t\t\tword += b3;\n\t\t\t}\n\t\t\telse\n\t\t\t{\n\t\t\tword += (0x01 << 24);\n\t\t\t}\n\t\t\treturn word;\n\t\t}\n\n\t\tfunction incCounter(counter)\n\t\t{\n\t\t\tif ((counter[0] = incWord(counter[0])) === 0)\n\t\t\t{\n\t\t\t\t// encr_data in fileenc.c from  Dr Brian Gladman's counts only with DWORD j < 8\n\t\t\t\tcounter[1] = incWord(counter[1]);\n\t\t\t}\n\t\t\treturn counter;\n\t\t}\n\n\t    var Encryptor = CTRGladman.Encryptor = CTRGladman.extend({\n\t        processBlock: function (words, offset) {\n\t            // Shortcuts\n\t            var cipher = this._cipher\n\t            var blockSize = cipher.blockSize;\n\t            var iv = this._iv;\n\t            var counter = this._counter;\n\n\t            // Generate keystream\n\t            if (iv) {\n\t                counter = this._counter = iv.slice(0);\n\n\t                // Remove IV for subsequent blocks\n\t                this._iv = undefined;\n\t            }\n\n\t\t\t\tincCounter(counter);\n\n\t\t\t\tvar keystream = counter.slice(0);\n\t            cipher.encryptBlock(keystream, 0);\n\n\t            // Encrypt\n\t            for (var i = 0; i < blockSize; i++) {\n\t                words[offset + i] ^= keystream[i];\n\t            }\n\t        }\n\t    });\n\n\t    CTRGladman.Decryptor = Encryptor;\n\n\t    return CTRGladman;\n\t}());\n\n\n\n\n\treturn CryptoJS.mode.CTRGladman;\n\n}));","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar MATCH = wellKnownSymbol('match');\n\nmodule.exports = function (METHOD_NAME) {\n  var regexp = /./;\n  try {\n    '/./'[METHOD_NAME](regexp);\n  } catch (error1) {\n    try {\n      regexp[MATCH] = false;\n      return '/./'[METHOD_NAME](regexp);\n    } catch (error2) { /* empty */ }\n  } return false;\n};\n","export function getDevtoolsGlobalHook() {\n    return getTarget().__VUE_DEVTOOLS_GLOBAL_HOOK__;\n}\nexport function getTarget() {\n    // @ts-ignore\n    return (typeof navigator !== 'undefined' && typeof window !== 'undefined')\n        ? window\n        : typeof global !== 'undefined'\n            ? global\n            : {};\n}\nexport const isProxyAvailable = typeof Proxy === 'function';\n","'use strict';\nvar $ = require('../internals/export');\nvar exec = require('../internals/regexp-exec');\n\n// `RegExp.prototype.exec` method\n// https://tc39.es/ecma262/#sec-regexp.prototype.exec\n$({ target: 'RegExp', proto: true, forced: /./.exec !== exec }, {\n  exec: exec\n});\n","// Ported from https://github.com/mafintosh/pump with\n// permission from the author, Mathias Buus (@mafintosh).\n'use strict';\n\nvar eos;\n\nfunction once(callback) {\n  var called = false;\n  return function () {\n    if (called) return;\n    called = true;\n    callback.apply(void 0, arguments);\n  };\n}\n\nvar _require$codes = require('../../../errors').codes,\n    ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,\n    ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;\n\nfunction noop(err) {\n  // Rethrow the error if it exists to avoid swallowing it\n  if (err) throw err;\n}\n\nfunction isRequest(stream) {\n  return stream.setHeader && typeof stream.abort === 'function';\n}\n\nfunction destroyer(stream, reading, writing, callback) {\n  callback = once(callback);\n  var closed = false;\n  stream.on('close', function () {\n    closed = true;\n  });\n  if (eos === undefined) eos = require('./end-of-stream');\n  eos(stream, {\n    readable: reading,\n    writable: writing\n  }, function (err) {\n    if (err) return callback(err);\n    closed = true;\n    callback();\n  });\n  var destroyed = false;\n  return function (err) {\n    if (closed) return;\n    if (destroyed) return;\n    destroyed = true; // request.destroy just do .end - .abort is what we want\n\n    if (isRequest(stream)) return stream.abort();\n    if (typeof stream.destroy === 'function') return stream.destroy();\n    callback(err || new ERR_STREAM_DESTROYED('pipe'));\n  };\n}\n\nfunction call(fn) {\n  fn();\n}\n\nfunction pipe(from, to) {\n  return from.pipe(to);\n}\n\nfunction popCallback(streams) {\n  if (!streams.length) return noop;\n  if (typeof streams[streams.length - 1] !== 'function') return noop;\n  return streams.pop();\n}\n\nfunction pipeline() {\n  for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {\n    streams[_key] = arguments[_key];\n  }\n\n  var callback = popCallback(streams);\n  if (Array.isArray(streams[0])) streams = streams[0];\n\n  if (streams.length < 2) {\n    throw new ERR_MISSING_ARGS('streams');\n  }\n\n  var error;\n  var destroys = streams.map(function (stream, i) {\n    var reading = i < streams.length - 1;\n    var writing = i > 0;\n    return destroyer(stream, reading, writing, function (err) {\n      if (!error) error = err;\n      if (err) destroys.forEach(call);\n      if (reading) return;\n      destroys.forEach(call);\n      callback(error);\n    });\n  });\n  return streams.reduce(pipe);\n}\n\nmodule.exports = pipeline;","/**\n * mux.js\n *\n * Copyright (c) 2016 Brightcove\n * All rights reserved.\n *\n * Utilities to detect basic properties and metadata about TS Segments.\n */\n'use strict';\n\nvar StreamTypes = require('./stream-types.js');\n\nvar parsePid = function(packet) {\n  var pid = packet[1] & 0x1f;\n  pid <<= 8;\n  pid |= packet[2];\n  return pid;\n};\n\nvar parsePayloadUnitStartIndicator = function(packet) {\n  return !!(packet[1] & 0x40);\n};\n\nvar parseAdaptionField = function(packet) {\n  var offset = 0;\n  // if an adaption field is present, its length is specified by the\n  // fifth byte of the TS packet header. The adaptation field is\n  // used to add stuffing to PES packets that don't fill a complete\n  // TS packet, and to specify some forms of timing and control data\n  // that we do not currently use.\n  if (((packet[3] & 0x30) >>> 4) > 0x01) {\n    offset += packet[4] + 1;\n  }\n  return offset;\n};\n\nvar parseType = function(packet, pmtPid) {\n  var pid = parsePid(packet);\n  if (pid === 0) {\n    return 'pat';\n  } else if (pid === pmtPid) {\n    return 'pmt';\n  } else if (pmtPid) {\n    return 'pes';\n  }\n  return null;\n};\n\nvar parsePat = function(packet) {\n  var pusi = parsePayloadUnitStartIndicator(packet);\n  var offset = 4 + parseAdaptionField(packet);\n\n  if (pusi) {\n    offset += packet[offset] + 1;\n  }\n\n  return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n};\n\nvar parsePmt = function(packet) {\n  var programMapTable = {};\n  var pusi = parsePayloadUnitStartIndicator(packet);\n  var payloadOffset = 4 + parseAdaptionField(packet);\n\n  if (pusi) {\n    payloadOffset += packet[payloadOffset] + 1;\n  }\n\n  // PMTs can be sent ahead of the time when they should actually\n  // take effect. We don't believe this should ever be the case\n  // for HLS but we'll ignore \"forward\" PMT declarations if we see\n  // them. Future PMT declarations have the current_next_indicator\n  // set to zero.\n  if (!(packet[payloadOffset + 5] & 0x01)) {\n    return;\n  }\n\n  var sectionLength, tableEnd, programInfoLength;\n  // the mapping table ends at the end of the current section\n  sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n  tableEnd = 3 + sectionLength - 4;\n\n  // to determine where the table is, we have to figure out how\n  // long the program info descriptors are\n  programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11];\n\n  // advance the offset to the first entry in the mapping table\n  var offset = 12 + programInfoLength;\n  while (offset < tableEnd) {\n    var i = payloadOffset + offset;\n    // add an entry that maps the elementary_pid to the stream_type\n    programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i];\n\n    // move to the next table entry\n    // skip past the elementary stream descriptors, if present\n    offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n  }\n  return programMapTable;\n};\n\nvar parsePesType = function(packet, programMapTable) {\n  var pid = parsePid(packet);\n  var type = programMapTable[pid];\n  switch (type) {\n    case StreamTypes.H264_STREAM_TYPE:\n      return 'video';\n    case StreamTypes.ADTS_STREAM_TYPE:\n      return 'audio';\n    case StreamTypes.METADATA_STREAM_TYPE:\n      return 'timed-metadata';\n    default:\n      return null;\n  }\n};\n\nvar parsePesTime = function(packet) {\n  var pusi = parsePayloadUnitStartIndicator(packet);\n  if (!pusi) {\n    return null;\n  }\n\n  var offset = 4 + parseAdaptionField(packet);\n\n  if (offset >= packet.byteLength) {\n    // From the H 222.0 MPEG-TS spec\n    // \"For transport stream packets carrying PES packets, stuffing is needed when there\n    //  is insufficient PES packet data to completely fill the transport stream packet\n    //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n    //  the sum of the lengths of the data elements in it, so that the payload bytes\n    //  remaining after the adaptation field exactly accommodates the available PES packet\n    //  data.\"\n    //\n    // If the offset is >= the length of the packet, then the packet contains no data\n    // and instead is just adaption field stuffing bytes\n    return null;\n  }\n\n  var pes = null;\n  var ptsDtsFlags;\n\n  // PES packets may be annotated with a PTS value, or a PTS value\n  // and a DTS value. Determine what combination of values is\n  // available to work with.\n  ptsDtsFlags = packet[offset + 7];\n\n  // PTS and DTS are normally stored as a 33-bit number.  Javascript\n  // performs all bitwise operations on 32-bit integers but javascript\n  // supports a much greater range (52-bits) of integer using standard\n  // mathematical operations.\n  // We construct a 31-bit value using bitwise operators over the 31\n  // most significant bits and then multiply by 4 (equal to a left-shift\n  // of 2) before we add the final 2 least significant bits of the\n  // timestamp (equal to an OR.)\n  if (ptsDtsFlags & 0xC0) {\n    pes = {};\n    // the PTS and DTS are not written out directly. For information\n    // on how they are encoded, see\n    // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n    pes.pts = (packet[offset + 9] & 0x0E) << 27 |\n      (packet[offset + 10] & 0xFF) << 20 |\n      (packet[offset + 11] & 0xFE) << 12 |\n      (packet[offset + 12] & 0xFF) <<  5 |\n      (packet[offset + 13] & 0xFE) >>>  3;\n    pes.pts *= 4; // Left shift by 2\n    pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n    pes.dts = pes.pts;\n    if (ptsDtsFlags & 0x40) {\n      pes.dts = (packet[offset + 14] & 0x0E) << 27 |\n        (packet[offset + 15] & 0xFF) << 20 |\n        (packet[offset + 16] & 0xFE) << 12 |\n        (packet[offset + 17] & 0xFF) << 5 |\n        (packet[offset + 18] & 0xFE) >>> 3;\n      pes.dts *= 4; // Left shift by 2\n      pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n    }\n  }\n  return pes;\n};\n\nvar parseNalUnitType = function(type) {\n  switch (type) {\n    case 0x05:\n      return 'slice_layer_without_partitioning_rbsp_idr';\n    case 0x06:\n      return 'sei_rbsp';\n    case 0x07:\n      return 'seq_parameter_set_rbsp';\n    case 0x08:\n      return 'pic_parameter_set_rbsp';\n    case 0x09:\n      return 'access_unit_delimiter_rbsp';\n    default:\n      return null;\n  }\n};\n\nvar videoPacketContainsKeyFrame = function(packet) {\n  var offset = 4 + parseAdaptionField(packet);\n  var frameBuffer = packet.subarray(offset);\n  var frameI = 0;\n  var frameSyncPoint = 0;\n  var foundKeyFrame = false;\n  var nalType;\n\n  // advance the sync point to a NAL start, if necessary\n  for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n    if (frameBuffer[frameSyncPoint + 2] === 1) {\n      // the sync point is properly aligned\n      frameI = frameSyncPoint + 5;\n      break;\n    }\n  }\n\n  while (frameI < frameBuffer.byteLength) {\n    // look at the current byte to determine if we've hit the end of\n    // a NAL unit boundary\n    switch (frameBuffer[frameI]) {\n    case 0:\n      // skip past non-sync sequences\n      if (frameBuffer[frameI - 1] !== 0) {\n        frameI += 2;\n        break;\n      } else if (frameBuffer[frameI - 2] !== 0) {\n        frameI++;\n        break;\n      }\n\n      if (frameSyncPoint + 3 !== frameI - 2) {\n        nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n        if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n          foundKeyFrame = true;\n        }\n      }\n\n      // drop trailing zeroes\n      do {\n        frameI++;\n      } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n      frameSyncPoint = frameI - 2;\n      frameI += 3;\n      break;\n    case 1:\n      // skip past non-sync sequences\n      if (frameBuffer[frameI - 1] !== 0 ||\n          frameBuffer[frameI - 2] !== 0) {\n        frameI += 3;\n        break;\n      }\n\n      nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n      if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n        foundKeyFrame = true;\n      }\n      frameSyncPoint = frameI - 2;\n      frameI += 3;\n      break;\n    default:\n      // the current byte isn't a one or zero, so it cannot be part\n      // of a sync sequence\n      frameI += 3;\n      break;\n    }\n  }\n  frameBuffer = frameBuffer.subarray(frameSyncPoint);\n  frameI -= frameSyncPoint;\n  frameSyncPoint = 0;\n  // parse the final nal\n  if (frameBuffer && frameBuffer.byteLength > 3) {\n    nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n    if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n      foundKeyFrame = true;\n    }\n  }\n\n  return foundKeyFrame;\n};\n\n\nmodule.exports = {\n  parseType: parseType,\n  parsePat: parsePat,\n  parsePmt: parsePmt,\n  parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n  parsePesType: parsePesType,\n  parsePesTime: parsePesTime,\n  videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n};\n","var parseKeys = require('parse-asn1')\nvar randomBytes = require('randombytes')\nvar createHash = require('create-hash')\nvar mgf = require('./mgf')\nvar xor = require('./xor')\nvar BN = require('bn.js')\nvar withPublic = require('./withPublic')\nvar crt = require('browserify-rsa')\nvar Buffer = require('safe-buffer').Buffer\n\nmodule.exports = function publicEncrypt (publicKey, msg, reverse) {\n  var padding\n  if (publicKey.padding) {\n    padding = publicKey.padding\n  } else if (reverse) {\n    padding = 1\n  } else {\n    padding = 4\n  }\n  var key = parseKeys(publicKey)\n  var paddedMsg\n  if (padding === 4) {\n    paddedMsg = oaep(key, msg)\n  } else if (padding === 1) {\n    paddedMsg = pkcs1(key, msg, reverse)\n  } else if (padding === 3) {\n    paddedMsg = new BN(msg)\n    if (paddedMsg.cmp(key.modulus) >= 0) {\n      throw new Error('data too long for modulus')\n    }\n  } else {\n    throw new Error('unknown padding')\n  }\n  if (reverse) {\n    return crt(paddedMsg, key)\n  } else {\n    return withPublic(paddedMsg, key)\n  }\n}\n\nfunction oaep (key, msg) {\n  var k = key.modulus.byteLength()\n  var mLen = msg.length\n  var iHash = createHash('sha1').update(Buffer.alloc(0)).digest()\n  var hLen = iHash.length\n  var hLen2 = 2 * hLen\n  if (mLen > k - hLen2 - 2) {\n    throw new Error('message too long')\n  }\n  var ps = Buffer.alloc(k - mLen - hLen2 - 2)\n  var dblen = k - hLen - 1\n  var seed = randomBytes(hLen)\n  var maskedDb = xor(Buffer.concat([iHash, ps, Buffer.alloc(1, 1), msg], dblen), mgf(seed, dblen))\n  var maskedSeed = xor(seed, mgf(maskedDb, hLen))\n  return new BN(Buffer.concat([Buffer.alloc(1), maskedSeed, maskedDb], k))\n}\nfunction pkcs1 (key, msg, reverse) {\n  var mLen = msg.length\n  var k = key.modulus.byteLength()\n  if (mLen > k - 11) {\n    throw new Error('message too long')\n  }\n  var ps\n  if (reverse) {\n    ps = Buffer.alloc(k - mLen - 3, 0xff)\n  } else {\n    ps = nonZero(k - mLen - 3)\n  }\n  return new BN(Buffer.concat([Buffer.from([0, reverse ? 1 : 2]), ps, Buffer.alloc(1), msg], k))\n}\nfunction nonZero (len) {\n  var out = Buffer.allocUnsafe(len)\n  var i = 0\n  var cache = randomBytes(len * 2)\n  var cur = 0\n  var num\n  while (i < len) {\n    if (cur === cache.length) {\n      cache = randomBytes(len * 2)\n      cur = 0\n    }\n    num = cache[cur++]\n    if (num) {\n      out[i++] = num\n    }\n  }\n  return out\n}\n","'use strict';\nvar anObject = require('../internals/an-object');\n\n// `RegExp.prototype.flags` getter implementation\n// https://tc39.es/ecma262/#sec-get-regexp.prototype.flags\nmodule.exports = function () {\n  var that = anObject(this);\n  var result = '';\n  if (that.global) result += 'g';\n  if (that.ignoreCase) result += 'i';\n  if (that.multiline) result += 'm';\n  if (that.dotAll) result += 's';\n  if (that.unicode) result += 'u';\n  if (that.sticky) result += 'y';\n  return result;\n};\n","import getWindow from \"../dom-utils/getWindow.js\"; // eslint-disable-next-line import/no-unused-modules\n\nvar passive = {\n  passive: true\n};\n\nfunction effect(_ref) {\n  var state = _ref.state,\n      instance = _ref.instance,\n      options = _ref.options;\n  var _options$scroll = options.scroll,\n      scroll = _options$scroll === void 0 ? true : _options$scroll,\n      _options$resize = options.resize,\n      resize = _options$resize === void 0 ? true : _options$resize;\n  var window = getWindow(state.elements.popper);\n  var scrollParents = [].concat(state.scrollParents.reference, state.scrollParents.popper);\n\n  if (scroll) {\n    scrollParents.forEach(function (scrollParent) {\n      scrollParent.addEventListener('scroll', instance.update, passive);\n    });\n  }\n\n  if (resize) {\n    window.addEventListener('resize', instance.update, passive);\n  }\n\n  return function () {\n    if (scroll) {\n      scrollParents.forEach(function (scrollParent) {\n        scrollParent.removeEventListener('scroll', instance.update, passive);\n      });\n    }\n\n    if (resize) {\n      window.removeEventListener('resize', instance.update, passive);\n    }\n  };\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'eventListeners',\n  enabled: true,\n  phase: 'write',\n  fn: function fn() {},\n  effect: effect,\n  data: {}\n};","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\n/*<replacement>*/\n\nvar pna = require('process-nextick-args');\n/*</replacement>*/\n\nmodule.exports = Readable;\n\n/*<replacement>*/\nvar isArray = require('isarray');\n/*</replacement>*/\n\n/*<replacement>*/\nvar Duplex;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n\n/*<replacement>*/\nvar EE = require('events').EventEmitter;\n\nvar EElistenerCount = function (emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n/*<replacement>*/\nvar Stream = require('./internal/streams/stream');\n/*</replacement>*/\n\n/*<replacement>*/\n\nvar Buffer = require('safe-buffer').Buffer;\nvar OurUint8Array = global.Uint8Array || function () {};\nfunction _uint8ArrayToBuffer(chunk) {\n  return Buffer.from(chunk);\n}\nfunction _isUint8Array(obj) {\n  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n\n/*</replacement>*/\n\n/*<replacement>*/\nvar util = Object.create(require('core-util-is'));\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n/*<replacement>*/\nvar debugUtil = require('util');\nvar debug = void 0;\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function () {};\n}\n/*</replacement>*/\n\nvar BufferList = require('./internal/streams/BufferList');\nvar destroyImpl = require('./internal/streams/destroy');\nvar StringDecoder;\n\nutil.inherits(Readable, Stream);\n\nvar kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];\n\nfunction prependListener(emitter, event, fn) {\n  // Sadly this is not cacheable as some libraries bundle their own\n  // event emitter implementation with them.\n  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);\n\n  // This is a hack to make sure that our error handler is attached before any\n  // userland ones.  NEVER DO THIS. This is here only because this code needs\n  // to continue to work with older versions of Node.js that do not include\n  // the prependListener() method. The goal is to eventually remove this hack.\n  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];\n}\n\nfunction ReadableState(options, stream) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  options = options || {};\n\n  // Duplex streams are both readable and writable, but share\n  // the same options object.\n  // However, some cases require setting options to different\n  // values for the readable and the writable sides of the duplex stream.\n  // These options can be provided separately as readableXXX and writableXXX.\n  var isDuplex = stream instanceof Duplex;\n\n  // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n  this.objectMode = !!options.objectMode;\n\n  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;\n\n  // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n  var hwm = options.highWaterMark;\n  var readableHwm = options.readableHighWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n\n  if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (readableHwm || readableHwm === 0)) this.highWaterMark = readableHwm;else this.highWaterMark = defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = Math.floor(this.highWaterMark);\n\n  // A linked list is used to store data chunks instead of an array because the\n  // linked list can remove elements from the beginning faster than\n  // array.shift()\n  this.buffer = new BufferList();\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false;\n\n  // a flag to be able to tell if the event 'readable'/'data' is emitted\n  // immediately, or on a later tick.  We set this to true at first, because\n  // any actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first read call.\n  this.sync = true;\n\n  // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n  this.resumeScheduled = false;\n\n  // has it been destroyed\n  this.destroyed = false;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // the number of writers that are awaiting a drain event in .pipe()s\n  this.awaitDrain = 0;\n\n  // if true, a maybeReadMore has been scheduled\n  this.readingMore = false;\n\n  this.decoder = null;\n  this.encoding = null;\n  if (options.encoding) {\n    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nfunction Readable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  if (!(this instanceof Readable)) return new Readable(options);\n\n  this._readableState = new ReadableState(options, this);\n\n  // legacy\n  this.readable = true;\n\n  if (options) {\n    if (typeof options.read === 'function') this._read = options.read;\n\n    if (typeof options.destroy === 'function') this._destroy = options.destroy;\n  }\n\n  Stream.call(this);\n}\n\nObject.defineProperty(Readable.prototype, 'destroyed', {\n  get: function () {\n    if (this._readableState === undefined) {\n      return false;\n    }\n    return this._readableState.destroyed;\n  },\n  set: function (value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (!this._readableState) {\n      return;\n    }\n\n    // backward compatibility, the user is explicitly\n    // managing destroyed\n    this._readableState.destroyed = value;\n  }\n});\n\nReadable.prototype.destroy = destroyImpl.destroy;\nReadable.prototype._undestroy = destroyImpl.undestroy;\nReadable.prototype._destroy = function (err, cb) {\n  this.push(null);\n  cb(err);\n};\n\n// Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\nReadable.prototype.push = function (chunk, encoding) {\n  var state = this._readableState;\n  var skipChunkCheck;\n\n  if (!state.objectMode) {\n    if (typeof chunk === 'string') {\n      encoding = encoding || state.defaultEncoding;\n      if (encoding !== state.encoding) {\n        chunk = Buffer.from(chunk, encoding);\n        encoding = '';\n      }\n      skipChunkCheck = true;\n    }\n  } else {\n    skipChunkCheck = true;\n  }\n\n  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);\n};\n\n// Unshift should *always* be something directly out of read()\nReadable.prototype.unshift = function (chunk) {\n  return readableAddChunk(this, chunk, null, true, false);\n};\n\nfunction readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {\n  var state = stream._readableState;\n  if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else {\n    var er;\n    if (!skipChunkCheck) er = chunkInvalid(state, chunk);\n    if (er) {\n      stream.emit('error', er);\n    } else if (state.objectMode || chunk && chunk.length > 0) {\n      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {\n        chunk = _uint8ArrayToBuffer(chunk);\n      }\n\n      if (addToFront) {\n        if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true);\n      } else if (state.ended) {\n        stream.emit('error', new Error('stream.push() after EOF'));\n      } else {\n        state.reading = false;\n        if (state.decoder && !encoding) {\n          chunk = state.decoder.write(chunk);\n          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);\n        } else {\n          addChunk(stream, state, chunk, false);\n        }\n      }\n    } else if (!addToFront) {\n      state.reading = false;\n    }\n  }\n\n  return needMoreData(state);\n}\n\nfunction addChunk(stream, state, chunk, addToFront) {\n  if (state.flowing && state.length === 0 && !state.sync) {\n    stream.emit('data', chunk);\n    stream.read(0);\n  } else {\n    // update the buffer info.\n    state.length += state.objectMode ? 1 : chunk.length;\n    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);\n\n    if (state.needReadable) emitReadable(stream);\n  }\n  maybeReadMore(stream, state);\n}\n\nfunction chunkInvalid(state, chunk) {\n  var er;\n  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {\n    er = new TypeError('Invalid non-string/buffer chunk');\n  }\n  return er;\n}\n\n// if it's past the high water mark, we can push in some more.\n// Also, if we have no data yet, we can stand some\n// more bytes.  This is to work around cases where hwm=0,\n// such as the repl.  Also, if the push() triggered a\n// readable event, and the user called read(largeNumber) such that\n// needReadable was set, then we ought to push more, so that another\n// 'readable' event will be triggered.\nfunction needMoreData(state) {\n  return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);\n}\n\nReadable.prototype.isPaused = function () {\n  return this._readableState.flowing === false;\n};\n\n// backwards compatibility.\nReadable.prototype.setEncoding = function (enc) {\n  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n  this._readableState.decoder = new StringDecoder(enc);\n  this._readableState.encoding = enc;\n  return this;\n};\n\n// Don't raise the hwm > 8MB\nvar MAX_HWM = 0x800000;\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2 to prevent increasing hwm excessively in\n    // tiny amounts\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n  return n;\n}\n\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction howMuchToRead(n, state) {\n  if (n <= 0 || state.length === 0 && state.ended) return 0;\n  if (state.objectMode) return 1;\n  if (n !== n) {\n    // Only flow one buffer at a time\n    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;\n  }\n  // If we're asking for more than the current hwm, then raise the hwm.\n  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);\n  if (n <= state.length) return n;\n  // Don't have enough\n  if (!state.ended) {\n    state.needReadable = true;\n    return 0;\n  }\n  return state.length;\n}\n\n// you can override either this method, or the async _read(n) below.\nReadable.prototype.read = function (n) {\n  debug('read', n);\n  n = parseInt(n, 10);\n  var state = this._readableState;\n  var nOrig = n;\n\n  if (n !== 0) state.emittedReadable = false;\n\n  // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n  if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state);\n\n  // if we've ended, and we're now clear, then finish it up.\n  if (n === 0 && state.ended) {\n    if (state.length === 0) endReadable(this);\n    return null;\n  }\n\n  // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n\n  // if we need a readable event, then we need to do some reading.\n  var doRead = state.needReadable;\n  debug('need readable', doRead);\n\n  // if we currently have less than the highWaterMark, then also read some\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  }\n\n  // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  } else if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true;\n    // if the length is currently zero, then we *need* a readable event.\n    if (state.length === 0) state.needReadable = true;\n    // call internal read method\n    this._read(state.highWaterMark);\n    state.sync = false;\n    // If _read pushed data synchronously, then `reading` will be false,\n    // and we need to re-evaluate how much data we can return to the user.\n    if (!state.reading) n = howMuchToRead(nOrig, state);\n  }\n\n  var ret;\n  if (n > 0) ret = fromList(n, state);else ret = null;\n\n  if (ret === null) {\n    state.needReadable = true;\n    n = 0;\n  } else {\n    state.length -= n;\n  }\n\n  if (state.length === 0) {\n    // If we have nothing in the buffer, then we want to know\n    // as soon as we *do* get something into the buffer.\n    if (!state.ended) state.needReadable = true;\n\n    // If we tried to read() past the EOF, then emit end on the next tick.\n    if (nOrig !== n && state.ended) endReadable(this);\n  }\n\n  if (ret !== null) this.emit('data', ret);\n\n  return ret;\n};\n\nfunction onEofChunk(stream, state) {\n  if (state.ended) return;\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n  state.ended = true;\n\n  // emit 'readable' now to make sure it gets picked up.\n  emitReadable(stream);\n}\n\n// Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  state.needReadable = false;\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    if (state.sync) pna.nextTick(emitReadable_, stream);else emitReadable_(stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  debug('emit readable');\n  stream.emit('readable');\n  flow(stream);\n}\n\n// at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    pna.nextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  var len = state.length;\n  while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length)\n      // didn't get any data, stop spinning.\n      break;else len = state.length;\n  }\n  state.readingMore = false;\n}\n\n// abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\nReadable.prototype._read = function (n) {\n  this.emit('error', new Error('_read() is not implemented'));\n};\n\nReadable.prototype.pipe = function (dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;\n\n  var endFn = doEnd ? onend : unpipe;\n  if (state.endEmitted) pna.nextTick(endFn);else src.once('end', endFn);\n\n  dest.on('unpipe', onunpipe);\n  function onunpipe(readable, unpipeInfo) {\n    debug('onunpipe');\n    if (readable === src) {\n      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {\n        unpipeInfo.hasUnpiped = true;\n        cleanup();\n      }\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  }\n\n  // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n\n  var cleanedUp = false;\n  function cleanup() {\n    debug('cleanup');\n    // cleanup event handlers once the pipe is broken\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', unpipe);\n    src.removeListener('data', ondata);\n\n    cleanedUp = true;\n\n    // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();\n  }\n\n  // If the user pushes more data while we're writing to dest then we'll end up\n  // in ondata again. However, we only want to increase awaitDrain once because\n  // dest will only emit one 'drain' event for the multiple writes.\n  // => Introduce a guard on increasing awaitDrain.\n  var increasedAwaitDrain = false;\n  src.on('data', ondata);\n  function ondata(chunk) {\n    debug('ondata');\n    increasedAwaitDrain = false;\n    var ret = dest.write(chunk);\n    if (false === ret && !increasedAwaitDrain) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      // => Check whether `dest` is still a piping destination.\n      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {\n        debug('false write response, pause', src._readableState.awaitDrain);\n        src._readableState.awaitDrain++;\n        increasedAwaitDrain = true;\n      }\n      src.pause();\n    }\n  }\n\n  // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);\n  }\n\n  // Make sure our error handler is attached before userland ones.\n  prependListener(dest, 'error', onerror);\n\n  // Both close and finish should trigger unpipe, but only once.\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n  dest.once('close', onclose);\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  }\n\n  // tell the dest that it's being piped to\n  dest.emit('pipe', src);\n\n  // start the flow if it hasn't been started already.\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function () {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain) state.awaitDrain--;\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\nReadable.prototype.unpipe = function (dest) {\n  var state = this._readableState;\n  var unpipeInfo = { hasUnpiped: false };\n\n  // if we're not piping anywhere, then do nothing.\n  if (state.pipesCount === 0) return this;\n\n  // just one destination.  most common case.\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes) return this;\n\n    if (!dest) dest = state.pipes;\n\n    // got a match.\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest) dest.emit('unpipe', this, unpipeInfo);\n    return this;\n  }\n\n  // slow case. multiple pipe destinations.\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++) {\n      dests[i].emit('unpipe', this, unpipeInfo);\n    }return this;\n  }\n\n  // try to find the right one.\n  var index = indexOf(state.pipes, dest);\n  if (index === -1) return this;\n\n  state.pipes.splice(index, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1) state.pipes = state.pipes[0];\n\n  dest.emit('unpipe', this, unpipeInfo);\n\n  return this;\n};\n\n// set up data events if they are asked for\n// Ensure readable listeners eventually get something\nReadable.prototype.on = function (ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n\n  if (ev === 'data') {\n    // Start flowing on next tick if stream isn't explicitly paused\n    if (this._readableState.flowing !== false) this.resume();\n  } else if (ev === 'readable') {\n    var state = this._readableState;\n    if (!state.endEmitted && !state.readableListening) {\n      state.readableListening = state.needReadable = true;\n      state.emittedReadable = false;\n      if (!state.reading) {\n        pna.nextTick(nReadingNextTick, this);\n      } else if (state.length) {\n        emitReadable(this);\n      }\n    }\n  }\n\n  return res;\n};\nReadable.prototype.addListener = Readable.prototype.on;\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n}\n\n// pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\nReadable.prototype.resume = function () {\n  var state = this._readableState;\n  if (!state.flowing) {\n    debug('resume');\n    state.flowing = true;\n    resume(this, state);\n  }\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    pna.nextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  if (!state.reading) {\n    debug('resume read 0');\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  state.awaitDrain = 0;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading) stream.read(0);\n}\n\nReadable.prototype.pause = function () {\n  debug('call pause flowing=%j', this._readableState.flowing);\n  if (false !== this._readableState.flowing) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n  while (state.flowing && stream.read() !== null) {}\n}\n\n// wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\nReadable.prototype.wrap = function (stream) {\n  var _this = this;\n\n  var state = this._readableState;\n  var paused = false;\n\n  stream.on('end', function () {\n    debug('wrapped end');\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length) _this.push(chunk);\n    }\n\n    _this.push(null);\n  });\n\n  stream.on('data', function (chunk) {\n    debug('wrapped data');\n    if (state.decoder) chunk = state.decoder.write(chunk);\n\n    // don't skip over falsy values in objectMode\n    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;\n\n    var ret = _this.push(chunk);\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  });\n\n  // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function (method) {\n        return function () {\n          return stream[method].apply(stream, arguments);\n        };\n      }(i);\n    }\n  }\n\n  // proxy certain important events.\n  for (var n = 0; n < kProxyEvents.length; n++) {\n    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));\n  }\n\n  // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n  this._read = function (n) {\n    debug('wrapped _read', n);\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return this;\n};\n\nObject.defineProperty(Readable.prototype, 'readableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function () {\n    return this._readableState.highWaterMark;\n  }\n});\n\n// exposed for testing purposes only.\nReadable._fromList = fromList;\n\n// Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction fromList(n, state) {\n  // nothing buffered\n  if (state.length === 0) return null;\n\n  var ret;\n  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {\n    // read it all, truncate the list\n    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);\n    state.buffer.clear();\n  } else {\n    // read part of list\n    ret = fromListPartial(n, state.buffer, state.decoder);\n  }\n\n  return ret;\n}\n\n// Extracts only enough buffered data to satisfy the amount requested.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction fromListPartial(n, list, hasStrings) {\n  var ret;\n  if (n < list.head.data.length) {\n    // slice is the same for buffers and strings\n    ret = list.head.data.slice(0, n);\n    list.head.data = list.head.data.slice(n);\n  } else if (n === list.head.data.length) {\n    // first chunk is a perfect match\n    ret = list.shift();\n  } else {\n    // result spans more than one buffer\n    ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);\n  }\n  return ret;\n}\n\n// Copies a specified amount of characters from the list of buffered data\n// chunks.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction copyFromBufferString(n, list) {\n  var p = list.head;\n  var c = 1;\n  var ret = p.data;\n  n -= ret.length;\n  while (p = p.next) {\n    var str = p.data;\n    var nb = n > str.length ? str.length : n;\n    if (nb === str.length) ret += str;else ret += str.slice(0, n);\n    n -= nb;\n    if (n === 0) {\n      if (nb === str.length) {\n        ++c;\n        if (p.next) list.head = p.next;else list.head = list.tail = null;\n      } else {\n        list.head = p;\n        p.data = str.slice(nb);\n      }\n      break;\n    }\n    ++c;\n  }\n  list.length -= c;\n  return ret;\n}\n\n// Copies a specified amount of bytes from the list of buffered data chunks.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction copyFromBuffer(n, list) {\n  var ret = Buffer.allocUnsafe(n);\n  var p = list.head;\n  var c = 1;\n  p.data.copy(ret);\n  n -= p.data.length;\n  while (p = p.next) {\n    var buf = p.data;\n    var nb = n > buf.length ? buf.length : n;\n    buf.copy(ret, ret.length - n, 0, nb);\n    n -= nb;\n    if (n === 0) {\n      if (nb === buf.length) {\n        ++c;\n        if (p.next) list.head = p.next;else list.head = list.tail = null;\n      } else {\n        list.head = p;\n        p.data = buf.slice(nb);\n      }\n      break;\n    }\n    ++c;\n  }\n  list.length -= c;\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n\n  // If we get here before consuming all the bytes, then that is a\n  // bug in node.  Should never happen.\n  if (state.length > 0) throw new Error('\"endReadable()\" called on non-empty stream');\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    pna.nextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  // Check that we didn't get one last unshift.\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n  }\n}\n\nfunction indexOf(xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n  return -1;\n}","export default function getMainAxisFromPlacement(placement) {\n  return ['top', 'bottom'].indexOf(placement) >= 0 ? 'x' : 'y';\n}","/**\n * mux.js\n *\n * Copyright (c) 2016 Brightcove\n * All rights reserved.\n *\n * A stream-based aac to mp4 converter. This utility can be used to\n * deliver mp4s to a SourceBuffer on platforms that support native\n * Media Source Extensions.\n */\n'use strict';\nvar Stream = require('../utils/stream.js');\n\n// Constants\nvar AacStream;\n\n/**\n * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n */\n\nAacStream = function() {\n  var\n    everything = new Uint8Array(),\n    timeStamp = 0;\n\n  AacStream.prototype.init.call(this);\n\n  this.setTimestamp = function(timestamp) {\n    timeStamp = timestamp;\n  };\n\n  this.parseId3TagSize = function(header, byteIndex) {\n    var\n      returnSize = (header[byteIndex + 6] << 21) |\n                   (header[byteIndex + 7] << 14) |\n                   (header[byteIndex + 8] << 7) |\n                   (header[byteIndex + 9]),\n      flags = header[byteIndex + 5],\n      footerPresent = (flags & 16) >> 4;\n\n    if (footerPresent) {\n      return returnSize + 20;\n    }\n    return returnSize + 10;\n  };\n\n  this.parseAdtsSize = function(header, byteIndex) {\n    var\n      lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n      middle = header[byteIndex + 4] << 3,\n      highTwo = header[byteIndex + 3] & 0x3 << 11;\n\n    return (highTwo | middle) | lowThree;\n  };\n\n  this.push = function(bytes) {\n    var\n      frameSize = 0,\n      byteIndex = 0,\n      bytesLeft,\n      chunk,\n      packet,\n      tempLength;\n\n    // If there are bytes remaining from the last segment, prepend them to the\n    // bytes that were pushed in\n    if (everything.length) {\n      tempLength = everything.length;\n      everything = new Uint8Array(bytes.byteLength + tempLength);\n      everything.set(everything.subarray(0, tempLength));\n      everything.set(bytes, tempLength);\n    } else {\n      everything = bytes;\n    }\n\n    while (everything.length - byteIndex >= 3) {\n      if ((everything[byteIndex] === 'I'.charCodeAt(0)) &&\n          (everything[byteIndex + 1] === 'D'.charCodeAt(0)) &&\n          (everything[byteIndex + 2] === '3'.charCodeAt(0))) {\n\n        // Exit early because we don't have enough to parse\n        // the ID3 tag header\n        if (everything.length - byteIndex < 10) {\n          break;\n        }\n\n        // check framesize\n        frameSize = this.parseId3TagSize(everything, byteIndex);\n\n        // Exit early if we don't have enough in the buffer\n        // to emit a full packet\n        if (frameSize > everything.length) {\n          break;\n        }\n        chunk = {\n          type: 'timed-metadata',\n          data: everything.subarray(byteIndex, byteIndex + frameSize)\n        };\n        this.trigger('data', chunk);\n        byteIndex += frameSize;\n        continue;\n      } else if ((everything[byteIndex] & 0xff === 0xff) &&\n                 ((everything[byteIndex + 1] & 0xf0) === 0xf0)) {\n\n        // Exit early because we don't have enough to parse\n        // the ADTS frame header\n        if (everything.length - byteIndex < 7) {\n          break;\n        }\n\n        frameSize = this.parseAdtsSize(everything, byteIndex);\n\n        // Exit early if we don't have enough in the buffer\n        // to emit a full packet\n        if (frameSize > everything.length) {\n          break;\n        }\n\n        packet = {\n          type: 'audio',\n          data: everything.subarray(byteIndex, byteIndex + frameSize),\n          pts: timeStamp,\n          dts: timeStamp\n        };\n        this.trigger('data', packet);\n        byteIndex += frameSize;\n        continue;\n      }\n      byteIndex++;\n    }\n    bytesLeft = everything.length - byteIndex;\n\n    if (bytesLeft > 0) {\n      everything = everything.subarray(byteIndex);\n    } else {\n      everything = new Uint8Array();\n    }\n  };\n};\n\nAacStream.prototype = new Stream();\n\nmodule.exports = AacStream;\n","import getComputedStyle from \"./getComputedStyle.js\";\nexport default function isScrollParent(element) {\n  // Firefox wants us to check `-x` and `-y` variations as well\n  var _getComputedStyle = getComputedStyle(element),\n      overflow = _getComputedStyle.overflow,\n      overflowX = _getComputedStyle.overflowX,\n      overflowY = _getComputedStyle.overflowY;\n\n  return /auto|scroll|overlay|hidden/.test(overflow + overflowY + overflowX);\n}","var Buffer = require('safe-buffer').Buffer\nvar MD5 = require('md5.js')\n\n/* eslint-disable camelcase */\nfunction EVP_BytesToKey (password, salt, keyBits, ivLen) {\n  if (!Buffer.isBuffer(password)) password = Buffer.from(password, 'binary')\n  if (salt) {\n    if (!Buffer.isBuffer(salt)) salt = Buffer.from(salt, 'binary')\n    if (salt.length !== 8) throw new RangeError('salt should be Buffer with 8 byte length')\n  }\n\n  var keyLen = keyBits / 8\n  var key = Buffer.alloc(keyLen)\n  var iv = Buffer.alloc(ivLen || 0)\n  var tmp = Buffer.alloc(0)\n\n  while (keyLen > 0 || ivLen > 0) {\n    var hash = new MD5()\n    hash.update(tmp)\n    hash.update(password)\n    if (salt) hash.update(salt)\n    tmp = hash.digest()\n\n    var used = 0\n\n    if (keyLen > 0) {\n      var keyStart = key.length - keyLen\n      used = Math.min(keyLen, tmp.length)\n      tmp.copy(key, keyStart, 0, used)\n      keyLen -= used\n    }\n\n    if (used < tmp.length && ivLen > 0) {\n      var ivStart = iv.length - ivLen\n      var length = Math.min(ivLen, tmp.length - used)\n      tmp.copy(iv, ivStart, used, used + length)\n      ivLen -= length\n    }\n  }\n\n  tmp.fill(0)\n  return { key: key, iv: iv }\n}\n\nmodule.exports = EVP_BytesToKey\n","'use strict';\nvar fails = require('../internals/fails');\nvar getPrototypeOf = require('../internals/object-get-prototype-of');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_PURE = require('../internals/is-pure');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar BUGGY_SAFARI_ITERATORS = false;\n\nvar returnThis = function () { return this; };\n\n// `%IteratorPrototype%` object\n// https://tc39.es/ecma262/#sec-%iteratorprototype%-object\nvar IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;\n\n/* eslint-disable es/no-array-prototype-keys -- safe */\nif ([].keys) {\n  arrayIterator = [].keys();\n  // Safari 8 has buggy iterators w/o `next`\n  if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;\n  else {\n    PrototypeOfArrayIteratorPrototype = getPrototypeOf(getPrototypeOf(arrayIterator));\n    if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;\n  }\n}\n\nvar NEW_ITERATOR_PROTOTYPE = IteratorPrototype == undefined || fails(function () {\n  var test = {};\n  // FF44- legacy iterators case\n  return IteratorPrototype[ITERATOR].call(test) !== test;\n});\n\nif (NEW_ITERATOR_PROTOTYPE) IteratorPrototype = {};\n\n// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()\nif ((!IS_PURE || NEW_ITERATOR_PROTOTYPE) && !has(IteratorPrototype, ITERATOR)) {\n  createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);\n}\n\nmodule.exports = {\n  IteratorPrototype: IteratorPrototype,\n  BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS\n};\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar autoKeyword = \"auto\";\nvar directionSetting = {\n  \"\": 1,\n  \"lr\": 1,\n  \"rl\": 1\n};\nvar alignSetting = {\n  \"start\": 1,\n  \"center\": 1,\n  \"end\": 1,\n  \"left\": 1,\n  \"right\": 1,\n  \"auto\": 1,\n  \"line-left\": 1,\n  \"line-right\": 1\n};\n\nfunction findDirectionSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var dir = directionSetting[value.toLowerCase()];\n  return dir ? value.toLowerCase() : false;\n}\n\nfunction findAlignSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var align = alignSetting[value.toLowerCase()];\n  return align ? value.toLowerCase() : false;\n}\n\nfunction VTTCue(startTime, endTime, text) {\n  /**\n   * Shim implementation specific properties. These properties are not in\n   * the spec.\n   */\n\n  // Lets us know when the VTTCue's data has changed in such a way that we need\n  // to recompute its display state. This lets us compute its display state\n  // lazily.\n  this.hasBeenReset = false;\n\n  /**\n   * VTTCue and TextTrackCue properties\n   * http://dev.w3.org/html5/webvtt/#vttcue-interface\n   */\n\n  var _id = \"\";\n  var _pauseOnExit = false;\n  var _startTime = startTime;\n  var _endTime = endTime;\n  var _text = text;\n  var _region = null;\n  var _vertical = \"\";\n  var _snapToLines = true;\n  var _line = \"auto\";\n  var _lineAlign = \"start\";\n  var _position = \"auto\";\n  var _positionAlign = \"auto\";\n  var _size = 100;\n  var _align = \"center\";\n\n  Object.defineProperties(this, {\n    \"id\": {\n      enumerable: true,\n      get: function() {\n        return _id;\n      },\n      set: function(value) {\n        _id = \"\" + value;\n      }\n    },\n\n    \"pauseOnExit\": {\n      enumerable: true,\n      get: function() {\n        return _pauseOnExit;\n      },\n      set: function(value) {\n        _pauseOnExit = !!value;\n      }\n    },\n\n    \"startTime\": {\n      enumerable: true,\n      get: function() {\n        return _startTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Start time must be set to a number.\");\n        }\n        _startTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"endTime\": {\n      enumerable: true,\n      get: function() {\n        return _endTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"End time must be set to a number.\");\n        }\n        _endTime = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"text\": {\n      enumerable: true,\n      get: function() {\n        return _text;\n      },\n      set: function(value) {\n        _text = \"\" + value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"region\": {\n      enumerable: true,\n      get: function() {\n        return _region;\n      },\n      set: function(value) {\n        _region = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"vertical\": {\n      enumerable: true,\n      get: function() {\n        return _vertical;\n      },\n      set: function(value) {\n        var setting = findDirectionSetting(value);\n        // Have to check for false because the setting an be an empty string.\n        if (setting === false) {\n          throw new SyntaxError(\"Vertical: an invalid or illegal direction string was specified.\");\n        }\n        _vertical = setting;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"snapToLines\": {\n      enumerable: true,\n      get: function() {\n        return _snapToLines;\n      },\n      set: function(value) {\n        _snapToLines = !!value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"line\": {\n      enumerable: true,\n      get: function() {\n        return _line;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\" && value !== autoKeyword) {\n          throw new SyntaxError(\"Line: an invalid number or illegal string was specified.\");\n        }\n        _line = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"lineAlign\": {\n      enumerable: true,\n      get: function() {\n        return _lineAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          console.warn(\"lineAlign: an invalid or illegal string was specified.\");\n        } else {\n          _lineAlign = setting;\n          this.hasBeenReset = true;\n        }\n      }\n    },\n\n    \"position\": {\n      enumerable: true,\n      get: function() {\n        return _position;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Position must be between 0 and 100.\");\n        }\n        _position = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"positionAlign\": {\n      enumerable: true,\n      get: function() {\n        return _positionAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          console.warn(\"positionAlign: an invalid or illegal string was specified.\");\n        } else {\n          _positionAlign = setting;\n          this.hasBeenReset = true;\n        }\n      }\n    },\n\n    \"size\": {\n      enumerable: true,\n      get: function() {\n        return _size;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Size must be between 0 and 100.\");\n        }\n        _size = value;\n        this.hasBeenReset = true;\n      }\n    },\n\n    \"align\": {\n      enumerable: true,\n      get: function() {\n        return _align;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"align: an invalid or illegal alignment string was specified.\");\n        }\n        _align = setting;\n        this.hasBeenReset = true;\n      }\n    }\n  });\n\n  /**\n   * Other <track> spec defined properties\n   */\n\n  // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n  this.displayState = undefined;\n}\n\n/**\n * VTTCue methods\n */\n\nVTTCue.prototype.getCueAsHTML = function() {\n  // Assume WebVTT.convertCueToDOMTree is on the global.\n  return WebVTT.convertCueToDOMTree(window, this.text);\n};\n\nmodule.exports = VTTCue;\n","'use strict';\nvar TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar classof = require('../internals/classof');\n\n// `Object.prototype.toString` method implementation\n// https://tc39.es/ecma262/#sec-object.prototype.tostring\nmodule.exports = TO_STRING_TAG_SUPPORT ? {}.toString : function toString() {\n  return '[object ' + classof(this) + ']';\n};\n","var conventions = require(\"./conventions\");\nvar dom = require('./dom')\nvar entities = require('./entities');\nvar sax = require('./sax');\n\nvar DOMImplementation = dom.DOMImplementation;\n\nvar NAMESPACE = conventions.NAMESPACE;\n\nvar ParseError = sax.ParseError;\nvar XMLReader = sax.XMLReader;\n\n/**\n * Normalizes line ending according to https://www.w3.org/TR/xml11/#sec-line-ends:\n *\n * > XML parsed entities are often stored in computer files which,\n * > for editing convenience, are organized into lines.\n * > These lines are typically separated by some combination\n * > of the characters CARRIAGE RETURN (#xD) and LINE FEED (#xA).\n * >\n * > To simplify the tasks of applications, the XML processor must behave\n * > as if it normalized all line breaks in external parsed entities (including the document entity)\n * > on input, before parsing, by translating all of the following to a single #xA character:\n * >\n * > 1. the two-character sequence #xD #xA\n * > 2. the two-character sequence #xD #x85\n * > 3. the single character #x85\n * > 4. the single character #x2028\n * > 5. any #xD character that is not immediately followed by #xA or #x85.\n *\n * @param {string} input\n * @returns {string}\n */\nfunction normalizeLineEndings(input) {\n\treturn input\n\t\t.replace(/\\r[\\n\\u0085]/g, '\\n')\n\t\t.replace(/[\\r\\u0085\\u2028]/g, '\\n')\n}\n\n/**\n * @typedef Locator\n * @property {number} [columnNumber]\n * @property {number} [lineNumber]\n */\n\n/**\n * @typedef DOMParserOptions\n * @property {DOMHandler} [domBuilder]\n * @property {Function} [errorHandler]\n * @property {(string) => string} [normalizeLineEndings] used to replace line endings before parsing\n * \t\t\t\t\t\tdefaults to `normalizeLineEndings`\n * @property {Locator} [locator]\n * @property {Record<string, string>} [xmlns]\n *\n * @see normalizeLineEndings\n */\n\n/**\n * The DOMParser interface provides the ability to parse XML or HTML source code\n * from a string into a DOM `Document`.\n *\n * _xmldom is different from the spec in that it allows an `options` parameter,\n * to override the default behavior._\n *\n * @param {DOMParserOptions} [options]\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMParser\n * @see https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-parsing-and-serialization\n */\nfunction DOMParser(options){\n\tthis.options = options ||{locator:{}};\n}\n\nDOMParser.prototype.parseFromString = function(source,mimeType){\n\tvar options = this.options;\n\tvar sax =  new XMLReader();\n\tvar domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler\n\tvar errorHandler = options.errorHandler;\n\tvar locator = options.locator;\n\tvar defaultNSMap = options.xmlns||{};\n\tvar isHTML = /\\/x?html?$/.test(mimeType);//mimeType.toLowerCase().indexOf('html') > -1;\n  \tvar entityMap = isHTML ? entities.HTML_ENTITIES : entities.XML_ENTITIES;\n\tif(locator){\n\t\tdomBuilder.setDocumentLocator(locator)\n\t}\n\n\tsax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);\n\tsax.domBuilder = options.domBuilder || domBuilder;\n\tif(isHTML){\n\t\tdefaultNSMap[''] = NAMESPACE.HTML;\n\t}\n\tdefaultNSMap.xml = defaultNSMap.xml || NAMESPACE.XML;\n\tvar normalize = options.normalizeLineEndings || normalizeLineEndings;\n\tif (source && typeof source === 'string') {\n\t\tsax.parse(\n\t\t\tnormalize(source),\n\t\t\tdefaultNSMap,\n\t\t\tentityMap\n\t\t)\n\t} else {\n\t\tsax.errorHandler.error('invalid doc source')\n\t}\n\treturn domBuilder.doc;\n}\nfunction buildErrorHandler(errorImpl,domBuilder,locator){\n\tif(!errorImpl){\n\t\tif(domBuilder instanceof DOMHandler){\n\t\t\treturn domBuilder;\n\t\t}\n\t\terrorImpl = domBuilder ;\n\t}\n\tvar errorHandler = {}\n\tvar isCallback = errorImpl instanceof Function;\n\tlocator = locator||{}\n\tfunction build(key){\n\t\tvar fn = errorImpl[key];\n\t\tif(!fn && isCallback){\n\t\t\tfn = errorImpl.length == 2?function(msg){errorImpl(key,msg)}:errorImpl;\n\t\t}\n\t\terrorHandler[key] = fn && function(msg){\n\t\t\tfn('[xmldom '+key+']\\t'+msg+_locator(locator));\n\t\t}||function(){};\n\t}\n\tbuild('warning');\n\tbuild('error');\n\tbuild('fatalError');\n\treturn errorHandler;\n}\n\n//console.log('#\\n\\n\\n\\n\\n\\n\\n####')\n/**\n * +ContentHandler+ErrorHandler\n * +LexicalHandler+EntityResolver2\n * -DeclHandler-DTDHandler\n *\n * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler\n * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2\n * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html\n */\nfunction DOMHandler() {\n    this.cdata = false;\n}\nfunction position(locator,node){\n\tnode.lineNumber = locator.lineNumber;\n\tnode.columnNumber = locator.columnNumber;\n}\n/**\n * @see org.xml.sax.ContentHandler#startDocument\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html\n */\nDOMHandler.prototype = {\n\tstartDocument : function() {\n    \tthis.doc = new DOMImplementation().createDocument(null, null, null);\n    \tif (this.locator) {\n        \tthis.doc.documentURI = this.locator.systemId;\n    \t}\n\t},\n\tstartElement:function(namespaceURI, localName, qName, attrs) {\n\t\tvar doc = this.doc;\n\t    var el = doc.createElementNS(namespaceURI, qName||localName);\n\t    var len = attrs.length;\n\t    appendElement(this, el);\n\t    this.currentElement = el;\n\n\t\tthis.locator && position(this.locator,el)\n\t    for (var i = 0 ; i < len; i++) {\n\t        var namespaceURI = attrs.getURI(i);\n\t        var value = attrs.getValue(i);\n\t        var qName = attrs.getQName(i);\n\t\t\tvar attr = doc.createAttributeNS(namespaceURI, qName);\n\t\t\tthis.locator &&position(attrs.getLocator(i),attr);\n\t\t\tattr.value = attr.nodeValue = value;\n\t\t\tel.setAttributeNode(attr)\n\t    }\n\t},\n\tendElement:function(namespaceURI, localName, qName) {\n\t\tvar current = this.currentElement\n\t\tvar tagName = current.tagName;\n\t\tthis.currentElement = current.parentNode;\n\t},\n\tstartPrefixMapping:function(prefix, uri) {\n\t},\n\tendPrefixMapping:function(prefix) {\n\t},\n\tprocessingInstruction:function(target, data) {\n\t    var ins = this.doc.createProcessingInstruction(target, data);\n\t    this.locator && position(this.locator,ins)\n\t    appendElement(this, ins);\n\t},\n\tignorableWhitespace:function(ch, start, length) {\n\t},\n\tcharacters:function(chars, start, length) {\n\t\tchars = _toString.apply(this,arguments)\n\t\t//console.log(chars)\n\t\tif(chars){\n\t\t\tif (this.cdata) {\n\t\t\t\tvar charNode = this.doc.createCDATASection(chars);\n\t\t\t} else {\n\t\t\t\tvar charNode = this.doc.createTextNode(chars);\n\t\t\t}\n\t\t\tif(this.currentElement){\n\t\t\t\tthis.currentElement.appendChild(charNode);\n\t\t\t}else if(/^\\s*$/.test(chars)){\n\t\t\t\tthis.doc.appendChild(charNode);\n\t\t\t\t//process xml\n\t\t\t}\n\t\t\tthis.locator && position(this.locator,charNode)\n\t\t}\n\t},\n\tskippedEntity:function(name) {\n\t},\n\tendDocument:function() {\n\t\tthis.doc.normalize();\n\t},\n\tsetDocumentLocator:function (locator) {\n\t    if(this.locator = locator){// && !('lineNumber' in locator)){\n\t    \tlocator.lineNumber = 0;\n\t    }\n\t},\n\t//LexicalHandler\n\tcomment:function(chars, start, length) {\n\t\tchars = _toString.apply(this,arguments)\n\t    var comm = this.doc.createComment(chars);\n\t    this.locator && position(this.locator,comm)\n\t    appendElement(this, comm);\n\t},\n\n\tstartCDATA:function() {\n\t    //used in characters() methods\n\t    this.cdata = true;\n\t},\n\tendCDATA:function() {\n\t    this.cdata = false;\n\t},\n\n\tstartDTD:function(name, publicId, systemId) {\n\t\tvar impl = this.doc.implementation;\n\t    if (impl && impl.createDocumentType) {\n\t        var dt = impl.createDocumentType(name, publicId, systemId);\n\t        this.locator && position(this.locator,dt)\n\t        appendElement(this, dt);\n\t\t\t\t\tthis.doc.doctype = dt;\n\t    }\n\t},\n\t/**\n\t * @see org.xml.sax.ErrorHandler\n\t * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html\n\t */\n\twarning:function(error) {\n\t\tconsole.warn('[xmldom warning]\\t'+error,_locator(this.locator));\n\t},\n\terror:function(error) {\n\t\tconsole.error('[xmldom error]\\t'+error,_locator(this.locator));\n\t},\n\tfatalError:function(error) {\n\t\tthrow new ParseError(error, this.locator);\n\t}\n}\nfunction _locator(l){\n\tif(l){\n\t\treturn '\\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'\n\t}\n}\nfunction _toString(chars,start,length){\n\tif(typeof chars == 'string'){\n\t\treturn chars.substr(start,length)\n\t}else{//java sax connect width xmldom on rhino(what about: \"? && !(chars instanceof String)\")\n\t\tif(chars.length >= start+length || start){\n\t\t\treturn new java.lang.String(chars,start,length)+'';\n\t\t}\n\t\treturn chars;\n\t}\n}\n\n/*\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html\n * used method of org.xml.sax.ext.LexicalHandler:\n *  #comment(chars, start, length)\n *  #startCDATA()\n *  #endCDATA()\n *  #startDTD(name, publicId, systemId)\n *\n *\n * IGNORED method of org.xml.sax.ext.LexicalHandler:\n *  #endDTD()\n *  #startEntity(name)\n *  #endEntity(name)\n *\n *\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html\n * IGNORED method of org.xml.sax.ext.DeclHandler\n * \t#attributeDecl(eName, aName, type, mode, value)\n *  #elementDecl(name, model)\n *  #externalEntityDecl(name, publicId, systemId)\n *  #internalEntityDecl(name, value)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html\n * IGNORED method of org.xml.sax.EntityResolver2\n *  #resolveEntity(String name,String publicId,String baseURI,String systemId)\n *  #resolveEntity(publicId, systemId)\n *  #getExternalSubset(name, baseURI)\n * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html\n * IGNORED method of org.xml.sax.DTDHandler\n *  #notationDecl(name, publicId, systemId) {};\n *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};\n */\n\"endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl\".replace(/\\w+/g,function(key){\n\tDOMHandler.prototype[key] = function(){return null}\n})\n\n/* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */\nfunction appendElement (hander,node) {\n    if (!hander.currentElement) {\n        hander.doc.appendChild(node);\n    } else {\n        hander.currentElement.appendChild(node);\n    }\n}//appendChild and setAttributeNS are preformance key\n\nexports.__DOMHandler = DOMHandler;\nexports.normalizeLineEndings = normalizeLineEndings;\nexports.DOMParser = DOMParser;\n","var DESCRIPTORS = require('../internals/descriptors');\nvar defineProperty = require('../internals/object-define-property').f;\n\nvar FunctionPrototype = Function.prototype;\nvar FunctionPrototypeToString = FunctionPrototype.toString;\nvar nameRE = /^\\s*function ([^ (]*)/;\nvar NAME = 'name';\n\n// Function instances `.name` property\n// https://tc39.es/ecma262/#sec-function-instances-name\nif (DESCRIPTORS && !(NAME in FunctionPrototype)) {\n  defineProperty(FunctionPrototype, NAME, {\n    configurable: true,\n    get: function () {\n      try {\n        return FunctionPrototypeToString.call(this).match(nameRE)[1];\n      } catch (error) {\n        return '';\n      }\n    }\n  });\n}\n","var setPrototypeOf = require(\"./setPrototypeOf.js\");\n\nvar isNativeReflectConstruct = require(\"./isNativeReflectConstruct.js\");\n\nfunction _construct(Parent, args, Class) {\n  if (isNativeReflectConstruct()) {\n    module.exports = _construct = Reflect.construct;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  } else {\n    module.exports = _construct = function _construct(Parent, args, Class) {\n      var a = [null];\n      a.push.apply(a, args);\n      var Constructor = Function.bind.apply(Parent, a);\n      var instance = new Constructor();\n      if (Class) setPrototypeOf(instance, Class.prototype);\n      return instance;\n    };\n\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  }\n\n  return _construct.apply(null, arguments);\n}\n\nmodule.exports = _construct;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// a duplex stream is just a stream that is both readable and writable.\n// Since JS doesn't have multiple prototypal inheritance, this class\n// prototypally inherits from Readable, and then parasitically from\n// Writable.\n\n'use strict';\n\n/*<replacement>*/\n\nvar pna = require('process-nextick-args');\n/*</replacement>*/\n\n/*<replacement>*/\nvar objectKeys = Object.keys || function (obj) {\n  var keys = [];\n  for (var key in obj) {\n    keys.push(key);\n  }return keys;\n};\n/*</replacement>*/\n\nmodule.exports = Duplex;\n\n/*<replacement>*/\nvar util = Object.create(require('core-util-is'));\nutil.inherits = require('inherits');\n/*</replacement>*/\n\nvar Readable = require('./_stream_readable');\nvar Writable = require('./_stream_writable');\n\nutil.inherits(Duplex, Readable);\n\n{\n  // avoid scope creep, the keys array can then be collected\n  var keys = objectKeys(Writable.prototype);\n  for (var v = 0; v < keys.length; v++) {\n    var method = keys[v];\n    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];\n  }\n}\n\nfunction Duplex(options) {\n  if (!(this instanceof Duplex)) return new Duplex(options);\n\n  Readable.call(this, options);\n  Writable.call(this, options);\n\n  if (options && options.readable === false) this.readable = false;\n\n  if (options && options.writable === false) this.writable = false;\n\n  this.allowHalfOpen = true;\n  if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;\n\n  this.once('end', onend);\n}\n\nObject.defineProperty(Duplex.prototype, 'writableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function () {\n    return this._writableState.highWaterMark;\n  }\n});\n\n// the no-half-open enforcer\nfunction onend() {\n  // if we allow half-open state, or if the writable side ended,\n  // then we're ok.\n  if (this.allowHalfOpen || this._writableState.ended) return;\n\n  // no more data can be written.\n  // But allow more writes to happen in this tick.\n  pna.nextTick(onEndNT, this);\n}\n\nfunction onEndNT(self) {\n  self.end();\n}\n\nObject.defineProperty(Duplex.prototype, 'destroyed', {\n  get: function () {\n    if (this._readableState === undefined || this._writableState === undefined) {\n      return false;\n    }\n    return this._readableState.destroyed && this._writableState.destroyed;\n  },\n  set: function (value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (this._readableState === undefined || this._writableState === undefined) {\n      return;\n    }\n\n    // backward compatibility, the user is explicitly\n    // managing destroyed\n    this._readableState.destroyed = value;\n    this._writableState.destroyed = value;\n  }\n});\n\nDuplex.prototype._destroy = function (err, cb) {\n  this.push(null);\n  this.end();\n\n  pna.nextTick(cb, err);\n};","'use strict';\n\nvar freeze = require('./conventions').freeze;\n\n/**\n * The entities that are predefined in every XML document.\n *\n * @see https://www.w3.org/TR/2006/REC-xml11-20060816/#sec-predefined-ent W3C XML 1.1\n * @see https://www.w3.org/TR/2008/REC-xml-20081126/#sec-predefined-ent W3C XML 1.0\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Predefined_entities_in_XML Wikipedia\n */\nexports.XML_ENTITIES = freeze({\n\tamp: '&',\n\tapos: \"'\",\n\tgt: '>',\n\tlt: '<',\n\tquot: '\"',\n});\n\n/**\n * A map of all entities that are detected in an HTML document.\n * They contain all entries from `XML_ENTITIES`.\n *\n * @see XML_ENTITIES\n * @see DOMParser.parseFromString\n * @see DOMImplementation.prototype.createHTMLDocument\n * @see https://html.spec.whatwg.org/#named-character-references WHATWG HTML(5) Spec\n * @see https://html.spec.whatwg.org/entities.json JSON\n * @see https://www.w3.org/TR/xml-entity-names/ W3C XML Entity Names\n * @see https://www.w3.org/TR/html4/sgml/entities.html W3C HTML4/SGML\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_entity_references_in_HTML Wikipedia (HTML)\n * @see https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Entities_representing_special_characters_in_XHTML Wikpedia (XHTML)\n */\nexports.HTML_ENTITIES = freeze({\n\tAacute: '\\u00C1',\n\taacute: '\\u00E1',\n\tAbreve: '\\u0102',\n\tabreve: '\\u0103',\n\tac: '\\u223E',\n\tacd: '\\u223F',\n\tacE: '\\u223E\\u0333',\n\tAcirc: '\\u00C2',\n\tacirc: '\\u00E2',\n\tacute: '\\u00B4',\n\tAcy: '\\u0410',\n\tacy: '\\u0430',\n\tAElig: '\\u00C6',\n\taelig: '\\u00E6',\n\taf: '\\u2061',\n\tAfr: '\\uD835\\uDD04',\n\tafr: '\\uD835\\uDD1E',\n\tAgrave: '\\u00C0',\n\tagrave: '\\u00E0',\n\talefsym: '\\u2135',\n\taleph: '\\u2135',\n\tAlpha: '\\u0391',\n\talpha: '\\u03B1',\n\tAmacr: '\\u0100',\n\tamacr: '\\u0101',\n\tamalg: '\\u2A3F',\n\tAMP: '\\u0026',\n\tamp: '\\u0026',\n\tAnd: '\\u2A53',\n\tand: '\\u2227',\n\tandand: '\\u2A55',\n\tandd: '\\u2A5C',\n\tandslope: '\\u2A58',\n\tandv: '\\u2A5A',\n\tang: '\\u2220',\n\tange: '\\u29A4',\n\tangle: '\\u2220',\n\tangmsd: '\\u2221',\n\tangmsdaa: '\\u29A8',\n\tangmsdab: '\\u29A9',\n\tangmsdac: '\\u29AA',\n\tangmsdad: '\\u29AB',\n\tangmsdae: '\\u29AC',\n\tangmsdaf: '\\u29AD',\n\tangmsdag: '\\u29AE',\n\tangmsdah: '\\u29AF',\n\tangrt: '\\u221F',\n\tangrtvb: '\\u22BE',\n\tangrtvbd: '\\u299D',\n\tangsph: '\\u2222',\n\tangst: '\\u00C5',\n\tangzarr: '\\u237C',\n\tAogon: '\\u0104',\n\taogon: '\\u0105',\n\tAopf: '\\uD835\\uDD38',\n\taopf: '\\uD835\\uDD52',\n\tap: '\\u2248',\n\tapacir: '\\u2A6F',\n\tapE: '\\u2A70',\n\tape: '\\u224A',\n\tapid: '\\u224B',\n\tapos: '\\u0027',\n\tApplyFunction: '\\u2061',\n\tapprox: '\\u2248',\n\tapproxeq: '\\u224A',\n\tAring: '\\u00C5',\n\taring: '\\u00E5',\n\tAscr: '\\uD835\\uDC9C',\n\tascr: '\\uD835\\uDCB6',\n\tAssign: '\\u2254',\n\tast: '\\u002A',\n\tasymp: '\\u2248',\n\tasympeq: '\\u224D',\n\tAtilde: '\\u00C3',\n\tatilde: '\\u00E3',\n\tAuml: '\\u00C4',\n\tauml: '\\u00E4',\n\tawconint: '\\u2233',\n\tawint: '\\u2A11',\n\tbackcong: '\\u224C',\n\tbackepsilon: '\\u03F6',\n\tbackprime: '\\u2035',\n\tbacksim: '\\u223D',\n\tbacksimeq: '\\u22CD',\n\tBackslash: '\\u2216',\n\tBarv: '\\u2AE7',\n\tbarvee: '\\u22BD',\n\tBarwed: '\\u2306',\n\tbarwed: '\\u2305',\n\tbarwedge: '\\u2305',\n\tbbrk: '\\u23B5',\n\tbbrktbrk: '\\u23B6',\n\tbcong: '\\u224C',\n\tBcy: '\\u0411',\n\tbcy: '\\u0431',\n\tbdquo: '\\u201E',\n\tbecaus: '\\u2235',\n\tBecause: '\\u2235',\n\tbecause: '\\u2235',\n\tbemptyv: '\\u29B0',\n\tbepsi: '\\u03F6',\n\tbernou: '\\u212C',\n\tBernoullis: '\\u212C',\n\tBeta: '\\u0392',\n\tbeta: '\\u03B2',\n\tbeth: '\\u2136',\n\tbetween: '\\u226C',\n\tBfr: '\\uD835\\uDD05',\n\tbfr: '\\uD835\\uDD1F',\n\tbigcap: '\\u22C2',\n\tbigcirc: '\\u25EF',\n\tbigcup: '\\u22C3',\n\tbigodot: '\\u2A00',\n\tbigoplus: '\\u2A01',\n\tbigotimes: '\\u2A02',\n\tbigsqcup: '\\u2A06',\n\tbigstar: '\\u2605',\n\tbigtriangledown: '\\u25BD',\n\tbigtriangleup: '\\u25B3',\n\tbiguplus: '\\u2A04',\n\tbigvee: '\\u22C1',\n\tbigwedge: '\\u22C0',\n\tbkarow: '\\u290D',\n\tblacklozenge: '\\u29EB',\n\tblacksquare: '\\u25AA',\n\tblacktriangle: '\\u25B4',\n\tblacktriangledown: '\\u25BE',\n\tblacktriangleleft: '\\u25C2',\n\tblacktriangleright: '\\u25B8',\n\tblank: '\\u2423',\n\tblk12: '\\u2592',\n\tblk14: '\\u2591',\n\tblk34: '\\u2593',\n\tblock: '\\u2588',\n\tbne: '\\u003D\\u20E5',\n\tbnequiv: '\\u2261\\u20E5',\n\tbNot: '\\u2AED',\n\tbnot: '\\u2310',\n\tBopf: '\\uD835\\uDD39',\n\tbopf: '\\uD835\\uDD53',\n\tbot: '\\u22A5',\n\tbottom: '\\u22A5',\n\tbowtie: '\\u22C8',\n\tboxbox: '\\u29C9',\n\tboxDL: '\\u2557',\n\tboxDl: '\\u2556',\n\tboxdL: '\\u2555',\n\tboxdl: '\\u2510',\n\tboxDR: '\\u2554',\n\tboxDr: '\\u2553',\n\tboxdR: '\\u2552',\n\tboxdr: '\\u250C',\n\tboxH: '\\u2550',\n\tboxh: '\\u2500',\n\tboxHD: '\\u2566',\n\tboxHd: '\\u2564',\n\tboxhD: '\\u2565',\n\tboxhd: '\\u252C',\n\tboxHU: '\\u2569',\n\tboxHu: '\\u2567',\n\tboxhU: '\\u2568',\n\tboxhu: '\\u2534',\n\tboxminus: '\\u229F',\n\tboxplus: '\\u229E',\n\tboxtimes: '\\u22A0',\n\tboxUL: '\\u255D',\n\tboxUl: '\\u255C',\n\tboxuL: '\\u255B',\n\tboxul: '\\u2518',\n\tboxUR: '\\u255A',\n\tboxUr: '\\u2559',\n\tboxuR: '\\u2558',\n\tboxur: '\\u2514',\n\tboxV: '\\u2551',\n\tboxv: '\\u2502',\n\tboxVH: '\\u256C',\n\tboxVh: '\\u256B',\n\tboxvH: '\\u256A',\n\tboxvh: '\\u253C',\n\tboxVL: '\\u2563',\n\tboxVl: '\\u2562',\n\tboxvL: '\\u2561',\n\tboxvl: '\\u2524',\n\tboxVR: '\\u2560',\n\tboxVr: '\\u255F',\n\tboxvR: '\\u255E',\n\tboxvr: '\\u251C',\n\tbprime: '\\u2035',\n\tBreve: '\\u02D8',\n\tbreve: '\\u02D8',\n\tbrvbar: '\\u00A6',\n\tBscr: '\\u212C',\n\tbscr: '\\uD835\\uDCB7',\n\tbsemi: '\\u204F',\n\tbsim: '\\u223D',\n\tbsime: '\\u22CD',\n\tbsol: '\\u005C',\n\tbsolb: '\\u29C5',\n\tbsolhsub: '\\u27C8',\n\tbull: '\\u2022',\n\tbullet: '\\u2022',\n\tbump: '\\u224E',\n\tbumpE: '\\u2AAE',\n\tbumpe: '\\u224F',\n\tBumpeq: '\\u224E',\n\tbumpeq: '\\u224F',\n\tCacute: '\\u0106',\n\tcacute: '\\u0107',\n\tCap: '\\u22D2',\n\tcap: '\\u2229',\n\tcapand: '\\u2A44',\n\tcapbrcup: '\\u2A49',\n\tcapcap: '\\u2A4B',\n\tcapcup: '\\u2A47',\n\tcapdot: '\\u2A40',\n\tCapitalDifferentialD: '\\u2145',\n\tcaps: '\\u2229\\uFE00',\n\tcaret: '\\u2041',\n\tcaron: '\\u02C7',\n\tCayleys: '\\u212D',\n\tccaps: '\\u2A4D',\n\tCcaron: '\\u010C',\n\tccaron: '\\u010D',\n\tCcedil: '\\u00C7',\n\tccedil: '\\u00E7',\n\tCcirc: '\\u0108',\n\tccirc: '\\u0109',\n\tCconint: '\\u2230',\n\tccups: '\\u2A4C',\n\tccupssm: '\\u2A50',\n\tCdot: '\\u010A',\n\tcdot: '\\u010B',\n\tcedil: '\\u00B8',\n\tCedilla: '\\u00B8',\n\tcemptyv: '\\u29B2',\n\tcent: '\\u00A2',\n\tCenterDot: '\\u00B7',\n\tcenterdot: '\\u00B7',\n\tCfr: '\\u212D',\n\tcfr: '\\uD835\\uDD20',\n\tCHcy: '\\u0427',\n\tchcy: '\\u0447',\n\tcheck: '\\u2713',\n\tcheckmark: '\\u2713',\n\tChi: '\\u03A7',\n\tchi: '\\u03C7',\n\tcir: '\\u25CB',\n\tcirc: '\\u02C6',\n\tcirceq: '\\u2257',\n\tcirclearrowleft: '\\u21BA',\n\tcirclearrowright: '\\u21BB',\n\tcircledast: '\\u229B',\n\tcircledcirc: '\\u229A',\n\tcircleddash: '\\u229D',\n\tCircleDot: '\\u2299',\n\tcircledR: '\\u00AE',\n\tcircledS: '\\u24C8',\n\tCircleMinus: '\\u2296',\n\tCirclePlus: '\\u2295',\n\tCircleTimes: '\\u2297',\n\tcirE: '\\u29C3',\n\tcire: '\\u2257',\n\tcirfnint: '\\u2A10',\n\tcirmid: '\\u2AEF',\n\tcirscir: '\\u29C2',\n\tClockwiseContourIntegral: '\\u2232',\n\tCloseCurlyDoubleQuote: '\\u201D',\n\tCloseCurlyQuote: '\\u2019',\n\tclubs: '\\u2663',\n\tclubsuit: '\\u2663',\n\tColon: '\\u2237',\n\tcolon: '\\u003A',\n\tColone: '\\u2A74',\n\tcolone: '\\u2254',\n\tcoloneq: '\\u2254',\n\tcomma: '\\u002C',\n\tcommat: '\\u0040',\n\tcomp: '\\u2201',\n\tcompfn: '\\u2218',\n\tcomplement: '\\u2201',\n\tcomplexes: '\\u2102',\n\tcong: '\\u2245',\n\tcongdot: '\\u2A6D',\n\tCongruent: '\\u2261',\n\tConint: '\\u222F',\n\tconint: '\\u222E',\n\tContourIntegral: '\\u222E',\n\tCopf: '\\u2102',\n\tcopf: '\\uD835\\uDD54',\n\tcoprod: '\\u2210',\n\tCoproduct: '\\u2210',\n\tCOPY: '\\u00A9',\n\tcopy: '\\u00A9',\n\tcopysr: '\\u2117',\n\tCounterClockwiseContourIntegral: '\\u2233',\n\tcrarr: '\\u21B5',\n\tCross: '\\u2A2F',\n\tcross: '\\u2717',\n\tCscr: '\\uD835\\uDC9E',\n\tcscr: '\\uD835\\uDCB8',\n\tcsub: '\\u2ACF',\n\tcsube: '\\u2AD1',\n\tcsup: '\\u2AD0',\n\tcsupe: '\\u2AD2',\n\tctdot: '\\u22EF',\n\tcudarrl: '\\u2938',\n\tcudarrr: '\\u2935',\n\tcuepr: '\\u22DE',\n\tcuesc: '\\u22DF',\n\tcularr: '\\u21B6',\n\tcularrp: '\\u293D',\n\tCup: '\\u22D3',\n\tcup: '\\u222A',\n\tcupbrcap: '\\u2A48',\n\tCupCap: '\\u224D',\n\tcupcap: '\\u2A46',\n\tcupcup: '\\u2A4A',\n\tcupdot: '\\u228D',\n\tcupor: '\\u2A45',\n\tcups: '\\u222A\\uFE00',\n\tcurarr: '\\u21B7',\n\tcurarrm: '\\u293C',\n\tcurlyeqprec: '\\u22DE',\n\tcurlyeqsucc: '\\u22DF',\n\tcurlyvee: '\\u22CE',\n\tcurlywedge: '\\u22CF',\n\tcurren: '\\u00A4',\n\tcurvearrowleft: '\\u21B6',\n\tcurvearrowright: '\\u21B7',\n\tcuvee: '\\u22CE',\n\tcuwed: '\\u22CF',\n\tcwconint: '\\u2232',\n\tcwint: '\\u2231',\n\tcylcty: '\\u232D',\n\tDagger: '\\u2021',\n\tdagger: '\\u2020',\n\tdaleth: '\\u2138',\n\tDarr: '\\u21A1',\n\tdArr: '\\u21D3',\n\tdarr: '\\u2193',\n\tdash: '\\u2010',\n\tDashv: '\\u2AE4',\n\tdashv: '\\u22A3',\n\tdbkarow: '\\u290F',\n\tdblac: '\\u02DD',\n\tDcaron: '\\u010E',\n\tdcaron: '\\u010F',\n\tDcy: '\\u0414',\n\tdcy: '\\u0434',\n\tDD: '\\u2145',\n\tdd: '\\u2146',\n\tddagger: '\\u2021',\n\tddarr: '\\u21CA',\n\tDDotrahd: '\\u2911',\n\tddotseq: '\\u2A77',\n\tdeg: '\\u00B0',\n\tDel: '\\u2207',\n\tDelta: '\\u0394',\n\tdelta: '\\u03B4',\n\tdemptyv: '\\u29B1',\n\tdfisht: '\\u297F',\n\tDfr: '\\uD835\\uDD07',\n\tdfr: '\\uD835\\uDD21',\n\tdHar: '\\u2965',\n\tdharl: '\\u21C3',\n\tdharr: '\\u21C2',\n\tDiacriticalAcute: '\\u00B4',\n\tDiacriticalDot: '\\u02D9',\n\tDiacriticalDoubleAcute: '\\u02DD',\n\tDiacriticalGrave: '\\u0060',\n\tDiacriticalTilde: '\\u02DC',\n\tdiam: '\\u22C4',\n\tDiamond: '\\u22C4',\n\tdiamond: '\\u22C4',\n\tdiamondsuit: '\\u2666',\n\tdiams: '\\u2666',\n\tdie: '\\u00A8',\n\tDifferentialD: '\\u2146',\n\tdigamma: '\\u03DD',\n\tdisin: '\\u22F2',\n\tdiv: '\\u00F7',\n\tdivide: '\\u00F7',\n\tdivideontimes: '\\u22C7',\n\tdivonx: '\\u22C7',\n\tDJcy: '\\u0402',\n\tdjcy: '\\u0452',\n\tdlcorn: '\\u231E',\n\tdlcrop: '\\u230D',\n\tdollar: '\\u0024',\n\tDopf: '\\uD835\\uDD3B',\n\tdopf: '\\uD835\\uDD55',\n\tDot: '\\u00A8',\n\tdot: '\\u02D9',\n\tDotDot: '\\u20DC',\n\tdoteq: '\\u2250',\n\tdoteqdot: '\\u2251',\n\tDotEqual: '\\u2250',\n\tdotminus: '\\u2238',\n\tdotplus: '\\u2214',\n\tdotsquare: '\\u22A1',\n\tdoublebarwedge: '\\u2306',\n\tDoubleContourIntegral: '\\u222F',\n\tDoubleDot: '\\u00A8',\n\tDoubleDownArrow: '\\u21D3',\n\tDoubleLeftArrow: '\\u21D0',\n\tDoubleLeftRightArrow: '\\u21D4',\n\tDoubleLeftTee: '\\u2AE4',\n\tDoubleLongLeftArrow: '\\u27F8',\n\tDoubleLongLeftRightArrow: '\\u27FA',\n\tDoubleLongRightArrow: '\\u27F9',\n\tDoubleRightArrow: '\\u21D2',\n\tDoubleRightTee: '\\u22A8',\n\tDoubleUpArrow: '\\u21D1',\n\tDoubleUpDownArrow: '\\u21D5',\n\tDoubleVerticalBar: '\\u2225',\n\tDownArrow: '\\u2193',\n\tDownarrow: '\\u21D3',\n\tdownarrow: '\\u2193',\n\tDownArrowBar: '\\u2913',\n\tDownArrowUpArrow: '\\u21F5',\n\tDownBreve: '\\u0311',\n\tdowndownarrows: '\\u21CA',\n\tdownharpoonleft: '\\u21C3',\n\tdownharpoonright: '\\u21C2',\n\tDownLeftRightVector: '\\u2950',\n\tDownLeftTeeVector: '\\u295E',\n\tDownLeftVector: '\\u21BD',\n\tDownLeftVectorBar: '\\u2956',\n\tDownRightTeeVector: '\\u295F',\n\tDownRightVector: '\\u21C1',\n\tDownRightVectorBar: '\\u2957',\n\tDownTee: '\\u22A4',\n\tDownTeeArrow: '\\u21A7',\n\tdrbkarow: '\\u2910',\n\tdrcorn: '\\u231F',\n\tdrcrop: '\\u230C',\n\tDscr: '\\uD835\\uDC9F',\n\tdscr: '\\uD835\\uDCB9',\n\tDScy: '\\u0405',\n\tdscy: '\\u0455',\n\tdsol: '\\u29F6',\n\tDstrok: '\\u0110',\n\tdstrok: '\\u0111',\n\tdtdot: '\\u22F1',\n\tdtri: '\\u25BF',\n\tdtrif: '\\u25BE',\n\tduarr: '\\u21F5',\n\tduhar: '\\u296F',\n\tdwangle: '\\u29A6',\n\tDZcy: '\\u040F',\n\tdzcy: '\\u045F',\n\tdzigrarr: '\\u27FF',\n\tEacute: '\\u00C9',\n\teacute: '\\u00E9',\n\teaster: '\\u2A6E',\n\tEcaron: '\\u011A',\n\tecaron: '\\u011B',\n\tecir: '\\u2256',\n\tEcirc: '\\u00CA',\n\tecirc: '\\u00EA',\n\tecolon: '\\u2255',\n\tEcy: '\\u042D',\n\tecy: '\\u044D',\n\teDDot: '\\u2A77',\n\tEdot: '\\u0116',\n\teDot: '\\u2251',\n\tedot: '\\u0117',\n\tee: '\\u2147',\n\tefDot: '\\u2252',\n\tEfr: '\\uD835\\uDD08',\n\tefr: '\\uD835\\uDD22',\n\teg: '\\u2A9A',\n\tEgrave: '\\u00C8',\n\tegrave: '\\u00E8',\n\tegs: '\\u2A96',\n\tegsdot: '\\u2A98',\n\tel: '\\u2A99',\n\tElement: '\\u2208',\n\telinters: '\\u23E7',\n\tell: '\\u2113',\n\tels: '\\u2A95',\n\telsdot: '\\u2A97',\n\tEmacr: '\\u0112',\n\temacr: '\\u0113',\n\tempty: '\\u2205',\n\temptyset: '\\u2205',\n\tEmptySmallSquare: '\\u25FB',\n\temptyv: '\\u2205',\n\tEmptyVerySmallSquare: '\\u25AB',\n\temsp: '\\u2003',\n\temsp13: '\\u2004',\n\temsp14: '\\u2005',\n\tENG: '\\u014A',\n\teng: '\\u014B',\n\tensp: '\\u2002',\n\tEogon: '\\u0118',\n\teogon: '\\u0119',\n\tEopf: '\\uD835\\uDD3C',\n\teopf: '\\uD835\\uDD56',\n\tepar: '\\u22D5',\n\teparsl: '\\u29E3',\n\teplus: '\\u2A71',\n\tepsi: '\\u03B5',\n\tEpsilon: '\\u0395',\n\tepsilon: '\\u03B5',\n\tepsiv: '\\u03F5',\n\teqcirc: '\\u2256',\n\teqcolon: '\\u2255',\n\teqsim: '\\u2242',\n\teqslantgtr: '\\u2A96',\n\teqslantless: '\\u2A95',\n\tEqual: '\\u2A75',\n\tequals: '\\u003D',\n\tEqualTilde: '\\u2242',\n\tequest: '\\u225F',\n\tEquilibrium: '\\u21CC',\n\tequiv: '\\u2261',\n\tequivDD: '\\u2A78',\n\teqvparsl: '\\u29E5',\n\terarr: '\\u2971',\n\terDot: '\\u2253',\n\tEscr: '\\u2130',\n\tescr: '\\u212F',\n\tesdot: '\\u2250',\n\tEsim: '\\u2A73',\n\tesim: '\\u2242',\n\tEta: '\\u0397',\n\teta: '\\u03B7',\n\tETH: '\\u00D0',\n\teth: '\\u00F0',\n\tEuml: '\\u00CB',\n\teuml: '\\u00EB',\n\teuro: '\\u20AC',\n\texcl: '\\u0021',\n\texist: '\\u2203',\n\tExists: '\\u2203',\n\texpectation: '\\u2130',\n\tExponentialE: '\\u2147',\n\texponentiale: '\\u2147',\n\tfallingdotseq: '\\u2252',\n\tFcy: '\\u0424',\n\tfcy: '\\u0444',\n\tfemale: '\\u2640',\n\tffilig: '\\uFB03',\n\tfflig: '\\uFB00',\n\tffllig: '\\uFB04',\n\tFfr: '\\uD835\\uDD09',\n\tffr: '\\uD835\\uDD23',\n\tfilig: '\\uFB01',\n\tFilledSmallSquare: '\\u25FC',\n\tFilledVerySmallSquare: '\\u25AA',\n\tfjlig: '\\u0066\\u006A',\n\tflat: '\\u266D',\n\tfllig: '\\uFB02',\n\tfltns: '\\u25B1',\n\tfnof: '\\u0192',\n\tFopf: '\\uD835\\uDD3D',\n\tfopf: '\\uD835\\uDD57',\n\tForAll: '\\u2200',\n\tforall: '\\u2200',\n\tfork: '\\u22D4',\n\tforkv: '\\u2AD9',\n\tFouriertrf: '\\u2131',\n\tfpartint: '\\u2A0D',\n\tfrac12: '\\u00BD',\n\tfrac13: '\\u2153',\n\tfrac14: '\\u00BC',\n\tfrac15: '\\u2155',\n\tfrac16: '\\u2159',\n\tfrac18: '\\u215B',\n\tfrac23: '\\u2154',\n\tfrac25: '\\u2156',\n\tfrac34: '\\u00BE',\n\tfrac35: '\\u2157',\n\tfrac38: '\\u215C',\n\tfrac45: '\\u2158',\n\tfrac56: '\\u215A',\n\tfrac58: '\\u215D',\n\tfrac78: '\\u215E',\n\tfrasl: '\\u2044',\n\tfrown: '\\u2322',\n\tFscr: '\\u2131',\n\tfscr: '\\uD835\\uDCBB',\n\tgacute: '\\u01F5',\n\tGamma: '\\u0393',\n\tgamma: '\\u03B3',\n\tGammad: '\\u03DC',\n\tgammad: '\\u03DD',\n\tgap: '\\u2A86',\n\tGbreve: '\\u011E',\n\tgbreve: '\\u011F',\n\tGcedil: '\\u0122',\n\tGcirc: '\\u011C',\n\tgcirc: '\\u011D',\n\tGcy: '\\u0413',\n\tgcy: '\\u0433',\n\tGdot: '\\u0120',\n\tgdot: '\\u0121',\n\tgE: '\\u2267',\n\tge: '\\u2265',\n\tgEl: '\\u2A8C',\n\tgel: '\\u22DB',\n\tgeq: '\\u2265',\n\tgeqq: '\\u2267',\n\tgeqslant: '\\u2A7E',\n\tges: '\\u2A7E',\n\tgescc: '\\u2AA9',\n\tgesdot: '\\u2A80',\n\tgesdoto: '\\u2A82',\n\tgesdotol: '\\u2A84',\n\tgesl: '\\u22DB\\uFE00',\n\tgesles: '\\u2A94',\n\tGfr: '\\uD835\\uDD0A',\n\tgfr: '\\uD835\\uDD24',\n\tGg: '\\u22D9',\n\tgg: '\\u226B',\n\tggg: '\\u22D9',\n\tgimel: '\\u2137',\n\tGJcy: '\\u0403',\n\tgjcy: '\\u0453',\n\tgl: '\\u2277',\n\tgla: '\\u2AA5',\n\tglE: '\\u2A92',\n\tglj: '\\u2AA4',\n\tgnap: '\\u2A8A',\n\tgnapprox: '\\u2A8A',\n\tgnE: '\\u2269',\n\tgne: '\\u2A88',\n\tgneq: '\\u2A88',\n\tgneqq: '\\u2269',\n\tgnsim: '\\u22E7',\n\tGopf: '\\uD835\\uDD3E',\n\tgopf: '\\uD835\\uDD58',\n\tgrave: '\\u0060',\n\tGreaterEqual: '\\u2265',\n\tGreaterEqualLess: '\\u22DB',\n\tGreaterFullEqual: '\\u2267',\n\tGreaterGreater: '\\u2AA2',\n\tGreaterLess: '\\u2277',\n\tGreaterSlantEqual: '\\u2A7E',\n\tGreaterTilde: '\\u2273',\n\tGscr: '\\uD835\\uDCA2',\n\tgscr: '\\u210A',\n\tgsim: '\\u2273',\n\tgsime: '\\u2A8E',\n\tgsiml: '\\u2A90',\n\tGt: '\\u226B',\n\tGT: '\\u003E',\n\tgt: '\\u003E',\n\tgtcc: '\\u2AA7',\n\tgtcir: '\\u2A7A',\n\tgtdot: '\\u22D7',\n\tgtlPar: '\\u2995',\n\tgtquest: '\\u2A7C',\n\tgtrapprox: '\\u2A86',\n\tgtrarr: '\\u2978',\n\tgtrdot: '\\u22D7',\n\tgtreqless: '\\u22DB',\n\tgtreqqless: '\\u2A8C',\n\tgtrless: '\\u2277',\n\tgtrsim: '\\u2273',\n\tgvertneqq: '\\u2269\\uFE00',\n\tgvnE: '\\u2269\\uFE00',\n\tHacek: '\\u02C7',\n\thairsp: '\\u200A',\n\thalf: '\\u00BD',\n\thamilt: '\\u210B',\n\tHARDcy: '\\u042A',\n\thardcy: '\\u044A',\n\thArr: '\\u21D4',\n\tharr: '\\u2194',\n\tharrcir: '\\u2948',\n\tharrw: '\\u21AD',\n\tHat: '\\u005E',\n\thbar: '\\u210F',\n\tHcirc: '\\u0124',\n\thcirc: '\\u0125',\n\thearts: '\\u2665',\n\theartsuit: '\\u2665',\n\thellip: '\\u2026',\n\thercon: '\\u22B9',\n\tHfr: '\\u210C',\n\thfr: '\\uD835\\uDD25',\n\tHilbertSpace: '\\u210B',\n\thksearow: '\\u2925',\n\thkswarow: '\\u2926',\n\thoarr: '\\u21FF',\n\thomtht: '\\u223B',\n\thookleftarrow: '\\u21A9',\n\thookrightarrow: '\\u21AA',\n\tHopf: '\\u210D',\n\thopf: '\\uD835\\uDD59',\n\thorbar: '\\u2015',\n\tHorizontalLine: '\\u2500',\n\tHscr: '\\u210B',\n\thscr: '\\uD835\\uDCBD',\n\thslash: '\\u210F',\n\tHstrok: '\\u0126',\n\thstrok: '\\u0127',\n\tHumpDownHump: '\\u224E',\n\tHumpEqual: '\\u224F',\n\thybull: '\\u2043',\n\thyphen: '\\u2010',\n\tIacute: '\\u00CD',\n\tiacute: '\\u00ED',\n\tic: '\\u2063',\n\tIcirc: '\\u00CE',\n\ticirc: '\\u00EE',\n\tIcy: '\\u0418',\n\ticy: '\\u0438',\n\tIdot: '\\u0130',\n\tIEcy: '\\u0415',\n\tiecy: '\\u0435',\n\tiexcl: '\\u00A1',\n\tiff: '\\u21D4',\n\tIfr: '\\u2111',\n\tifr: '\\uD835\\uDD26',\n\tIgrave: '\\u00CC',\n\tigrave: '\\u00EC',\n\tii: '\\u2148',\n\tiiiint: '\\u2A0C',\n\tiiint: '\\u222D',\n\tiinfin: '\\u29DC',\n\tiiota: '\\u2129',\n\tIJlig: '\\u0132',\n\tijlig: '\\u0133',\n\tIm: '\\u2111',\n\tImacr: '\\u012A',\n\timacr: '\\u012B',\n\timage: '\\u2111',\n\tImaginaryI: '\\u2148',\n\timagline: '\\u2110',\n\timagpart: '\\u2111',\n\timath: '\\u0131',\n\timof: '\\u22B7',\n\timped: '\\u01B5',\n\tImplies: '\\u21D2',\n\tin: '\\u2208',\n\tincare: '\\u2105',\n\tinfin: '\\u221E',\n\tinfintie: '\\u29DD',\n\tinodot: '\\u0131',\n\tInt: '\\u222C',\n\tint: '\\u222B',\n\tintcal: '\\u22BA',\n\tintegers: '\\u2124',\n\tIntegral: '\\u222B',\n\tintercal: '\\u22BA',\n\tIntersection: '\\u22C2',\n\tintlarhk: '\\u2A17',\n\tintprod: '\\u2A3C',\n\tInvisibleComma: '\\u2063',\n\tInvisibleTimes: '\\u2062',\n\tIOcy: '\\u0401',\n\tiocy: '\\u0451',\n\tIogon: '\\u012E',\n\tiogon: '\\u012F',\n\tIopf: '\\uD835\\uDD40',\n\tiopf: '\\uD835\\uDD5A',\n\tIota: '\\u0399',\n\tiota: '\\u03B9',\n\tiprod: '\\u2A3C',\n\tiquest: '\\u00BF',\n\tIscr: '\\u2110',\n\tiscr: '\\uD835\\uDCBE',\n\tisin: '\\u2208',\n\tisindot: '\\u22F5',\n\tisinE: '\\u22F9',\n\tisins: '\\u22F4',\n\tisinsv: '\\u22F3',\n\tisinv: '\\u2208',\n\tit: '\\u2062',\n\tItilde: '\\u0128',\n\titilde: '\\u0129',\n\tIukcy: '\\u0406',\n\tiukcy: '\\u0456',\n\tIuml: '\\u00CF',\n\tiuml: '\\u00EF',\n\tJcirc: '\\u0134',\n\tjcirc: '\\u0135',\n\tJcy: '\\u0419',\n\tjcy: '\\u0439',\n\tJfr: '\\uD835\\uDD0D',\n\tjfr: '\\uD835\\uDD27',\n\tjmath: '\\u0237',\n\tJopf: '\\uD835\\uDD41',\n\tjopf: '\\uD835\\uDD5B',\n\tJscr: '\\uD835\\uDCA5',\n\tjscr: '\\uD835\\uDCBF',\n\tJsercy: '\\u0408',\n\tjsercy: '\\u0458',\n\tJukcy: '\\u0404',\n\tjukcy: '\\u0454',\n\tKappa: '\\u039A',\n\tkappa: '\\u03BA',\n\tkappav: '\\u03F0',\n\tKcedil: '\\u0136',\n\tkcedil: '\\u0137',\n\tKcy: '\\u041A',\n\tkcy: '\\u043A',\n\tKfr: '\\uD835\\uDD0E',\n\tkfr: '\\uD835\\uDD28',\n\tkgreen: '\\u0138',\n\tKHcy: '\\u0425',\n\tkhcy: '\\u0445',\n\tKJcy: '\\u040C',\n\tkjcy: '\\u045C',\n\tKopf: '\\uD835\\uDD42',\n\tkopf: '\\uD835\\uDD5C',\n\tKscr: '\\uD835\\uDCA6',\n\tkscr: '\\uD835\\uDCC0',\n\tlAarr: '\\u21DA',\n\tLacute: '\\u0139',\n\tlacute: '\\u013A',\n\tlaemptyv: '\\u29B4',\n\tlagran: '\\u2112',\n\tLambda: '\\u039B',\n\tlambda: '\\u03BB',\n\tLang: '\\u27EA',\n\tlang: '\\u27E8',\n\tlangd: '\\u2991',\n\tlangle: '\\u27E8',\n\tlap: '\\u2A85',\n\tLaplacetrf: '\\u2112',\n\tlaquo: '\\u00AB',\n\tLarr: '\\u219E',\n\tlArr: '\\u21D0',\n\tlarr: '\\u2190',\n\tlarrb: '\\u21E4',\n\tlarrbfs: '\\u291F',\n\tlarrfs: '\\u291D',\n\tlarrhk: '\\u21A9',\n\tlarrlp: '\\u21AB',\n\tlarrpl: '\\u2939',\n\tlarrsim: '\\u2973',\n\tlarrtl: '\\u21A2',\n\tlat: '\\u2AAB',\n\tlAtail: '\\u291B',\n\tlatail: '\\u2919',\n\tlate: '\\u2AAD',\n\tlates: '\\u2AAD\\uFE00',\n\tlBarr: '\\u290E',\n\tlbarr: '\\u290C',\n\tlbbrk: '\\u2772',\n\tlbrace: '\\u007B',\n\tlbrack: '\\u005B',\n\tlbrke: '\\u298B',\n\tlbrksld: '\\u298F',\n\tlbrkslu: '\\u298D',\n\tLcaron: '\\u013D',\n\tlcaron: '\\u013E',\n\tLcedil: '\\u013B',\n\tlcedil: '\\u013C',\n\tlceil: '\\u2308',\n\tlcub: '\\u007B',\n\tLcy: '\\u041B',\n\tlcy: '\\u043B',\n\tldca: '\\u2936',\n\tldquo: '\\u201C',\n\tldquor: '\\u201E',\n\tldrdhar: '\\u2967',\n\tldrushar: '\\u294B',\n\tldsh: '\\u21B2',\n\tlE: '\\u2266',\n\tle: '\\u2264',\n\tLeftAngleBracket: '\\u27E8',\n\tLeftArrow: '\\u2190',\n\tLeftarrow: '\\u21D0',\n\tleftarrow: '\\u2190',\n\tLeftArrowBar: '\\u21E4',\n\tLeftArrowRightArrow: '\\u21C6',\n\tleftarrowtail: '\\u21A2',\n\tLeftCeiling: '\\u2308',\n\tLeftDoubleBracket: '\\u27E6',\n\tLeftDownTeeVector: '\\u2961',\n\tLeftDownVector: '\\u21C3',\n\tLeftDownVectorBar: '\\u2959',\n\tLeftFloor: '\\u230A',\n\tleftharpoondown: '\\u21BD',\n\tleftharpoonup: '\\u21BC',\n\tleftleftarrows: '\\u21C7',\n\tLeftRightArrow: '\\u2194',\n\tLeftrightarrow: '\\u21D4',\n\tleftrightarrow: '\\u2194',\n\tleftrightarrows: '\\u21C6',\n\tleftrightharpoons: '\\u21CB',\n\tleftrightsquigarrow: '\\u21AD',\n\tLeftRightVector: '\\u294E',\n\tLeftTee: '\\u22A3',\n\tLeftTeeArrow: '\\u21A4',\n\tLeftTeeVector: '\\u295A',\n\tleftthreetimes: '\\u22CB',\n\tLeftTriangle: '\\u22B2',\n\tLeftTriangleBar: '\\u29CF',\n\tLeftTriangleEqual: '\\u22B4',\n\tLeftUpDownVector: '\\u2951',\n\tLeftUpTeeVector: '\\u2960',\n\tLeftUpVector: '\\u21BF',\n\tLeftUpVectorBar: '\\u2958',\n\tLeftVector: '\\u21BC',\n\tLeftVectorBar: '\\u2952',\n\tlEg: '\\u2A8B',\n\tleg: '\\u22DA',\n\tleq: '\\u2264',\n\tleqq: '\\u2266',\n\tleqslant: '\\u2A7D',\n\tles: '\\u2A7D',\n\tlescc: '\\u2AA8',\n\tlesdot: '\\u2A7F',\n\tlesdoto: '\\u2A81',\n\tlesdotor: '\\u2A83',\n\tlesg: '\\u22DA\\uFE00',\n\tlesges: '\\u2A93',\n\tlessapprox: '\\u2A85',\n\tlessdot: '\\u22D6',\n\tlesseqgtr: '\\u22DA',\n\tlesseqqgtr: '\\u2A8B',\n\tLessEqualGreater: '\\u22DA',\n\tLessFullEqual: '\\u2266',\n\tLessGreater: '\\u2276',\n\tlessgtr: '\\u2276',\n\tLessLess: '\\u2AA1',\n\tlesssim: '\\u2272',\n\tLessSlantEqual: '\\u2A7D',\n\tLessTilde: '\\u2272',\n\tlfisht: '\\u297C',\n\tlfloor: '\\u230A',\n\tLfr: '\\uD835\\uDD0F',\n\tlfr: '\\uD835\\uDD29',\n\tlg: '\\u2276',\n\tlgE: '\\u2A91',\n\tlHar: '\\u2962',\n\tlhard: '\\u21BD',\n\tlharu: '\\u21BC',\n\tlharul: '\\u296A',\n\tlhblk: '\\u2584',\n\tLJcy: '\\u0409',\n\tljcy: '\\u0459',\n\tLl: '\\u22D8',\n\tll: '\\u226A',\n\tllarr: '\\u21C7',\n\tllcorner: '\\u231E',\n\tLleftarrow: '\\u21DA',\n\tllhard: '\\u296B',\n\tlltri: '\\u25FA',\n\tLmidot: '\\u013F',\n\tlmidot: '\\u0140',\n\tlmoust: '\\u23B0',\n\tlmoustache: '\\u23B0',\n\tlnap: '\\u2A89',\n\tlnapprox: '\\u2A89',\n\tlnE: '\\u2268',\n\tlne: '\\u2A87',\n\tlneq: '\\u2A87',\n\tlneqq: '\\u2268',\n\tlnsim: '\\u22E6',\n\tloang: '\\u27EC',\n\tloarr: '\\u21FD',\n\tlobrk: '\\u27E6',\n\tLongLeftArrow: '\\u27F5',\n\tLongleftarrow: '\\u27F8',\n\tlongleftarrow: '\\u27F5',\n\tLongLeftRightArrow: '\\u27F7',\n\tLongleftrightarrow: '\\u27FA',\n\tlongleftrightarrow: '\\u27F7',\n\tlongmapsto: '\\u27FC',\n\tLongRightArrow: '\\u27F6',\n\tLongrightarrow: '\\u27F9',\n\tlongrightarrow: '\\u27F6',\n\tlooparrowleft: '\\u21AB',\n\tlooparrowright: '\\u21AC',\n\tlopar: '\\u2985',\n\tLopf: '\\uD835\\uDD43',\n\tlopf: '\\uD835\\uDD5D',\n\tloplus: '\\u2A2D',\n\tlotimes: '\\u2A34',\n\tlowast: '\\u2217',\n\tlowbar: '\\u005F',\n\tLowerLeftArrow: '\\u2199',\n\tLowerRightArrow: '\\u2198',\n\tloz: '\\u25CA',\n\tlozenge: '\\u25CA',\n\tlozf: '\\u29EB',\n\tlpar: '\\u0028',\n\tlparlt: '\\u2993',\n\tlrarr: '\\u21C6',\n\tlrcorner: '\\u231F',\n\tlrhar: '\\u21CB',\n\tlrhard: '\\u296D',\n\tlrm: '\\u200E',\n\tlrtri: '\\u22BF',\n\tlsaquo: '\\u2039',\n\tLscr: '\\u2112',\n\tlscr: '\\uD835\\uDCC1',\n\tLsh: '\\u21B0',\n\tlsh: '\\u21B0',\n\tlsim: '\\u2272',\n\tlsime: '\\u2A8D',\n\tlsimg: '\\u2A8F',\n\tlsqb: '\\u005B',\n\tlsquo: '\\u2018',\n\tlsquor: '\\u201A',\n\tLstrok: '\\u0141',\n\tlstrok: '\\u0142',\n\tLt: '\\u226A',\n\tLT: '\\u003C',\n\tlt: '\\u003C',\n\tltcc: '\\u2AA6',\n\tltcir: '\\u2A79',\n\tltdot: '\\u22D6',\n\tlthree: '\\u22CB',\n\tltimes: '\\u22C9',\n\tltlarr: '\\u2976',\n\tltquest: '\\u2A7B',\n\tltri: '\\u25C3',\n\tltrie: '\\u22B4',\n\tltrif: '\\u25C2',\n\tltrPar: '\\u2996',\n\tlurdshar: '\\u294A',\n\tluruhar: '\\u2966',\n\tlvertneqq: '\\u2268\\uFE00',\n\tlvnE: '\\u2268\\uFE00',\n\tmacr: '\\u00AF',\n\tmale: '\\u2642',\n\tmalt: '\\u2720',\n\tmaltese: '\\u2720',\n\tMap: '\\u2905',\n\tmap: '\\u21A6',\n\tmapsto: '\\u21A6',\n\tmapstodown: '\\u21A7',\n\tmapstoleft: '\\u21A4',\n\tmapstoup: '\\u21A5',\n\tmarker: '\\u25AE',\n\tmcomma: '\\u2A29',\n\tMcy: '\\u041C',\n\tmcy: '\\u043C',\n\tmdash: '\\u2014',\n\tmDDot: '\\u223A',\n\tmeasuredangle: '\\u2221',\n\tMediumSpace: '\\u205F',\n\tMellintrf: '\\u2133',\n\tMfr: '\\uD835\\uDD10',\n\tmfr: '\\uD835\\uDD2A',\n\tmho: '\\u2127',\n\tmicro: '\\u00B5',\n\tmid: '\\u2223',\n\tmidast: '\\u002A',\n\tmidcir: '\\u2AF0',\n\tmiddot: '\\u00B7',\n\tminus: '\\u2212',\n\tminusb: '\\u229F',\n\tminusd: '\\u2238',\n\tminusdu: '\\u2A2A',\n\tMinusPlus: '\\u2213',\n\tmlcp: '\\u2ADB',\n\tmldr: '\\u2026',\n\tmnplus: '\\u2213',\n\tmodels: '\\u22A7',\n\tMopf: '\\uD835\\uDD44',\n\tmopf: '\\uD835\\uDD5E',\n\tmp: '\\u2213',\n\tMscr: '\\u2133',\n\tmscr: '\\uD835\\uDCC2',\n\tmstpos: '\\u223E',\n\tMu: '\\u039C',\n\tmu: '\\u03BC',\n\tmultimap: '\\u22B8',\n\tmumap: '\\u22B8',\n\tnabla: '\\u2207',\n\tNacute: '\\u0143',\n\tnacute: '\\u0144',\n\tnang: '\\u2220\\u20D2',\n\tnap: '\\u2249',\n\tnapE: '\\u2A70\\u0338',\n\tnapid: '\\u224B\\u0338',\n\tnapos: '\\u0149',\n\tnapprox: '\\u2249',\n\tnatur: '\\u266E',\n\tnatural: '\\u266E',\n\tnaturals: '\\u2115',\n\tnbsp: '\\u00A0',\n\tnbump: '\\u224E\\u0338',\n\tnbumpe: '\\u224F\\u0338',\n\tncap: '\\u2A43',\n\tNcaron: '\\u0147',\n\tncaron: '\\u0148',\n\tNcedil: '\\u0145',\n\tncedil: '\\u0146',\n\tncong: '\\u2247',\n\tncongdot: '\\u2A6D\\u0338',\n\tncup: '\\u2A42',\n\tNcy: '\\u041D',\n\tncy: '\\u043D',\n\tndash: '\\u2013',\n\tne: '\\u2260',\n\tnearhk: '\\u2924',\n\tneArr: '\\u21D7',\n\tnearr: '\\u2197',\n\tnearrow: '\\u2197',\n\tnedot: '\\u2250\\u0338',\n\tNegativeMediumSpace: '\\u200B',\n\tNegativeThickSpace: '\\u200B',\n\tNegativeThinSpace: '\\u200B',\n\tNegativeVeryThinSpace: '\\u200B',\n\tnequiv: '\\u2262',\n\tnesear: '\\u2928',\n\tnesim: '\\u2242\\u0338',\n\tNestedGreaterGreater: '\\u226B',\n\tNestedLessLess: '\\u226A',\n\tNewLine: '\\u000A',\n\tnexist: '\\u2204',\n\tnexists: '\\u2204',\n\tNfr: '\\uD835\\uDD11',\n\tnfr: '\\uD835\\uDD2B',\n\tngE: '\\u2267\\u0338',\n\tnge: '\\u2271',\n\tngeq: '\\u2271',\n\tngeqq: '\\u2267\\u0338',\n\tngeqslant: '\\u2A7E\\u0338',\n\tnges: '\\u2A7E\\u0338',\n\tnGg: '\\u22D9\\u0338',\n\tngsim: '\\u2275',\n\tnGt: '\\u226B\\u20D2',\n\tngt: '\\u226F',\n\tngtr: '\\u226F',\n\tnGtv: '\\u226B\\u0338',\n\tnhArr: '\\u21CE',\n\tnharr: '\\u21AE',\n\tnhpar: '\\u2AF2',\n\tni: '\\u220B',\n\tnis: '\\u22FC',\n\tnisd: '\\u22FA',\n\tniv: '\\u220B',\n\tNJcy: '\\u040A',\n\tnjcy: '\\u045A',\n\tnlArr: '\\u21CD',\n\tnlarr: '\\u219A',\n\tnldr: '\\u2025',\n\tnlE: '\\u2266\\u0338',\n\tnle: '\\u2270',\n\tnLeftarrow: '\\u21CD',\n\tnleftarrow: '\\u219A',\n\tnLeftrightarrow: '\\u21CE',\n\tnleftrightarrow: '\\u21AE',\n\tnleq: '\\u2270',\n\tnleqq: '\\u2266\\u0338',\n\tnleqslant: '\\u2A7D\\u0338',\n\tnles: '\\u2A7D\\u0338',\n\tnless: '\\u226E',\n\tnLl: '\\u22D8\\u0338',\n\tnlsim: '\\u2274',\n\tnLt: '\\u226A\\u20D2',\n\tnlt: '\\u226E',\n\tnltri: '\\u22EA',\n\tnltrie: '\\u22EC',\n\tnLtv: '\\u226A\\u0338',\n\tnmid: '\\u2224',\n\tNoBreak: '\\u2060',\n\tNonBreakingSpace: '\\u00A0',\n\tNopf: '\\u2115',\n\tnopf: '\\uD835\\uDD5F',\n\tNot: '\\u2AEC',\n\tnot: '\\u00AC',\n\tNotCongruent: '\\u2262',\n\tNotCupCap: '\\u226D',\n\tNotDoubleVerticalBar: '\\u2226',\n\tNotElement: '\\u2209',\n\tNotEqual: '\\u2260',\n\tNotEqualTilde: '\\u2242\\u0338',\n\tNotExists: '\\u2204',\n\tNotGreater: '\\u226F',\n\tNotGreaterEqual: '\\u2271',\n\tNotGreaterFullEqual: '\\u2267\\u0338',\n\tNotGreaterGreater: '\\u226B\\u0338',\n\tNotGreaterLess: '\\u2279',\n\tNotGreaterSlantEqual: '\\u2A7E\\u0338',\n\tNotGreaterTilde: '\\u2275',\n\tNotHumpDownHump: '\\u224E\\u0338',\n\tNotHumpEqual: '\\u224F\\u0338',\n\tnotin: '\\u2209',\n\tnotindot: '\\u22F5\\u0338',\n\tnotinE: '\\u22F9\\u0338',\n\tnotinva: '\\u2209',\n\tnotinvb: '\\u22F7',\n\tnotinvc: '\\u22F6',\n\tNotLeftTriangle: '\\u22EA',\n\tNotLeftTriangleBar: '\\u29CF\\u0338',\n\tNotLeftTriangleEqual: '\\u22EC',\n\tNotLess: '\\u226E',\n\tNotLessEqual: '\\u2270',\n\tNotLessGreater: '\\u2278',\n\tNotLessLess: '\\u226A\\u0338',\n\tNotLessSlantEqual: '\\u2A7D\\u0338',\n\tNotLessTilde: '\\u2274',\n\tNotNestedGreaterGreater: '\\u2AA2\\u0338',\n\tNotNestedLessLess: '\\u2AA1\\u0338',\n\tnotni: '\\u220C',\n\tnotniva: '\\u220C',\n\tnotnivb: '\\u22FE',\n\tnotnivc: '\\u22FD',\n\tNotPrecedes: '\\u2280',\n\tNotPrecedesEqual: '\\u2AAF\\u0338',\n\tNotPrecedesSlantEqual: '\\u22E0',\n\tNotReverseElement: '\\u220C',\n\tNotRightTriangle: '\\u22EB',\n\tNotRightTriangleBar: '\\u29D0\\u0338',\n\tNotRightTriangleEqual: '\\u22ED',\n\tNotSquareSubset: '\\u228F\\u0338',\n\tNotSquareSubsetEqual: '\\u22E2',\n\tNotSquareSuperset: '\\u2290\\u0338',\n\tNotSquareSupersetEqual: '\\u22E3',\n\tNotSubset: '\\u2282\\u20D2',\n\tNotSubsetEqual: '\\u2288',\n\tNotSucceeds: '\\u2281',\n\tNotSucceedsEqual: '\\u2AB0\\u0338',\n\tNotSucceedsSlantEqual: '\\u22E1',\n\tNotSucceedsTilde: '\\u227F\\u0338',\n\tNotSuperset: '\\u2283\\u20D2',\n\tNotSupersetEqual: '\\u2289',\n\tNotTilde: '\\u2241',\n\tNotTildeEqual: '\\u2244',\n\tNotTildeFullEqual: '\\u2247',\n\tNotTildeTilde: '\\u2249',\n\tNotVerticalBar: '\\u2224',\n\tnpar: '\\u2226',\n\tnparallel: '\\u2226',\n\tnparsl: '\\u2AFD\\u20E5',\n\tnpart: '\\u2202\\u0338',\n\tnpolint: '\\u2A14',\n\tnpr: '\\u2280',\n\tnprcue: '\\u22E0',\n\tnpre: '\\u2AAF\\u0338',\n\tnprec: '\\u2280',\n\tnpreceq: '\\u2AAF\\u0338',\n\tnrArr: '\\u21CF',\n\tnrarr: '\\u219B',\n\tnrarrc: '\\u2933\\u0338',\n\tnrarrw: '\\u219D\\u0338',\n\tnRightarrow: '\\u21CF',\n\tnrightarrow: '\\u219B',\n\tnrtri: '\\u22EB',\n\tnrtrie: '\\u22ED',\n\tnsc: '\\u2281',\n\tnsccue: '\\u22E1',\n\tnsce: '\\u2AB0\\u0338',\n\tNscr: '\\uD835\\uDCA9',\n\tnscr: '\\uD835\\uDCC3',\n\tnshortmid: '\\u2224',\n\tnshortparallel: '\\u2226',\n\tnsim: '\\u2241',\n\tnsime: '\\u2244',\n\tnsimeq: '\\u2244',\n\tnsmid: '\\u2224',\n\tnspar: '\\u2226',\n\tnsqsube: '\\u22E2',\n\tnsqsupe: '\\u22E3',\n\tnsub: '\\u2284',\n\tnsubE: '\\u2AC5\\u0338',\n\tnsube: '\\u2288',\n\tnsubset: '\\u2282\\u20D2',\n\tnsubseteq: '\\u2288',\n\tnsubseteqq: '\\u2AC5\\u0338',\n\tnsucc: '\\u2281',\n\tnsucceq: '\\u2AB0\\u0338',\n\tnsup: '\\u2285',\n\tnsupE: '\\u2AC6\\u0338',\n\tnsupe: '\\u2289',\n\tnsupset: '\\u2283\\u20D2',\n\tnsupseteq: '\\u2289',\n\tnsupseteqq: '\\u2AC6\\u0338',\n\tntgl: '\\u2279',\n\tNtilde: '\\u00D1',\n\tntilde: '\\u00F1',\n\tntlg: '\\u2278',\n\tntriangleleft: '\\u22EA',\n\tntrianglelefteq: '\\u22EC',\n\tntriangleright: '\\u22EB',\n\tntrianglerighteq: '\\u22ED',\n\tNu: '\\u039D',\n\tnu: '\\u03BD',\n\tnum: '\\u0023',\n\tnumero: '\\u2116',\n\tnumsp: '\\u2007',\n\tnvap: '\\u224D\\u20D2',\n\tnVDash: '\\u22AF',\n\tnVdash: '\\u22AE',\n\tnvDash: '\\u22AD',\n\tnvdash: '\\u22AC',\n\tnvge: '\\u2265\\u20D2',\n\tnvgt: '\\u003E\\u20D2',\n\tnvHarr: '\\u2904',\n\tnvinfin: '\\u29DE',\n\tnvlArr: '\\u2902',\n\tnvle: '\\u2264\\u20D2',\n\tnvlt: '\\u003C\\u20D2',\n\tnvltrie: '\\u22B4\\u20D2',\n\tnvrArr: '\\u2903',\n\tnvrtrie: '\\u22B5\\u20D2',\n\tnvsim: '\\u223C\\u20D2',\n\tnwarhk: '\\u2923',\n\tnwArr: '\\u21D6',\n\tnwarr: '\\u2196',\n\tnwarrow: '\\u2196',\n\tnwnear: '\\u2927',\n\tOacute: '\\u00D3',\n\toacute: '\\u00F3',\n\toast: '\\u229B',\n\tocir: '\\u229A',\n\tOcirc: '\\u00D4',\n\tocirc: '\\u00F4',\n\tOcy: '\\u041E',\n\tocy: '\\u043E',\n\todash: '\\u229D',\n\tOdblac: '\\u0150',\n\todblac: '\\u0151',\n\todiv: '\\u2A38',\n\todot: '\\u2299',\n\todsold: '\\u29BC',\n\tOElig: '\\u0152',\n\toelig: '\\u0153',\n\tofcir: '\\u29BF',\n\tOfr: '\\uD835\\uDD12',\n\tofr: '\\uD835\\uDD2C',\n\togon: '\\u02DB',\n\tOgrave: '\\u00D2',\n\tograve: '\\u00F2',\n\togt: '\\u29C1',\n\tohbar: '\\u29B5',\n\tohm: '\\u03A9',\n\toint: '\\u222E',\n\tolarr: '\\u21BA',\n\tolcir: '\\u29BE',\n\tolcross: '\\u29BB',\n\toline: '\\u203E',\n\tolt: '\\u29C0',\n\tOmacr: '\\u014C',\n\tomacr: '\\u014D',\n\tOmega: '\\u03A9',\n\tomega: '\\u03C9',\n\tOmicron: '\\u039F',\n\tomicron: '\\u03BF',\n\tomid: '\\u29B6',\n\tominus: '\\u2296',\n\tOopf: '\\uD835\\uDD46',\n\toopf: '\\uD835\\uDD60',\n\topar: '\\u29B7',\n\tOpenCurlyDoubleQuote: '\\u201C',\n\tOpenCurlyQuote: '\\u2018',\n\toperp: '\\u29B9',\n\toplus: '\\u2295',\n\tOr: '\\u2A54',\n\tor: '\\u2228',\n\torarr: '\\u21BB',\n\tord: '\\u2A5D',\n\torder: '\\u2134',\n\torderof: '\\u2134',\n\tordf: '\\u00AA',\n\tordm: '\\u00BA',\n\torigof: '\\u22B6',\n\toror: '\\u2A56',\n\torslope: '\\u2A57',\n\torv: '\\u2A5B',\n\toS: '\\u24C8',\n\tOscr: '\\uD835\\uDCAA',\n\toscr: '\\u2134',\n\tOslash: '\\u00D8',\n\toslash: '\\u00F8',\n\tosol: '\\u2298',\n\tOtilde: '\\u00D5',\n\totilde: '\\u00F5',\n\tOtimes: '\\u2A37',\n\totimes: '\\u2297',\n\totimesas: '\\u2A36',\n\tOuml: '\\u00D6',\n\touml: '\\u00F6',\n\tovbar: '\\u233D',\n\tOverBar: '\\u203E',\n\tOverBrace: '\\u23DE',\n\tOverBracket: '\\u23B4',\n\tOverParenthesis: '\\u23DC',\n\tpar: '\\u2225',\n\tpara: '\\u00B6',\n\tparallel: '\\u2225',\n\tparsim: '\\u2AF3',\n\tparsl: '\\u2AFD',\n\tpart: '\\u2202',\n\tPartialD: '\\u2202',\n\tPcy: '\\u041F',\n\tpcy: '\\u043F',\n\tpercnt: '\\u0025',\n\tperiod: '\\u002E',\n\tpermil: '\\u2030',\n\tperp: '\\u22A5',\n\tpertenk: '\\u2031',\n\tPfr: '\\uD835\\uDD13',\n\tpfr: '\\uD835\\uDD2D',\n\tPhi: '\\u03A6',\n\tphi: '\\u03C6',\n\tphiv: '\\u03D5',\n\tphmmat: '\\u2133',\n\tphone: '\\u260E',\n\tPi: '\\u03A0',\n\tpi: '\\u03C0',\n\tpitchfork: '\\u22D4',\n\tpiv: '\\u03D6',\n\tplanck: '\\u210F',\n\tplanckh: '\\u210E',\n\tplankv: '\\u210F',\n\tplus: '\\u002B',\n\tplusacir: '\\u2A23',\n\tplusb: '\\u229E',\n\tpluscir: '\\u2A22',\n\tplusdo: '\\u2214',\n\tplusdu: '\\u2A25',\n\tpluse: '\\u2A72',\n\tPlusMinus: '\\u00B1',\n\tplusmn: '\\u00B1',\n\tplussim: '\\u2A26',\n\tplustwo: '\\u2A27',\n\tpm: '\\u00B1',\n\tPoincareplane: '\\u210C',\n\tpointint: '\\u2A15',\n\tPopf: '\\u2119',\n\tpopf: '\\uD835\\uDD61',\n\tpound: '\\u00A3',\n\tPr: '\\u2ABB',\n\tpr: '\\u227A',\n\tprap: '\\u2AB7',\n\tprcue: '\\u227C',\n\tprE: '\\u2AB3',\n\tpre: '\\u2AAF',\n\tprec: '\\u227A',\n\tprecapprox: '\\u2AB7',\n\tpreccurlyeq: '\\u227C',\n\tPrecedes: '\\u227A',\n\tPrecedesEqual: '\\u2AAF',\n\tPrecedesSlantEqual: '\\u227C',\n\tPrecedesTilde: '\\u227E',\n\tpreceq: '\\u2AAF',\n\tprecnapprox: '\\u2AB9',\n\tprecneqq: '\\u2AB5',\n\tprecnsim: '\\u22E8',\n\tprecsim: '\\u227E',\n\tPrime: '\\u2033',\n\tprime: '\\u2032',\n\tprimes: '\\u2119',\n\tprnap: '\\u2AB9',\n\tprnE: '\\u2AB5',\n\tprnsim: '\\u22E8',\n\tprod: '\\u220F',\n\tProduct: '\\u220F',\n\tprofalar: '\\u232E',\n\tprofline: '\\u2312',\n\tprofsurf: '\\u2313',\n\tprop: '\\u221D',\n\tProportion: '\\u2237',\n\tProportional: '\\u221D',\n\tpropto: '\\u221D',\n\tprsim: '\\u227E',\n\tprurel: '\\u22B0',\n\tPscr: '\\uD835\\uDCAB',\n\tpscr: '\\uD835\\uDCC5',\n\tPsi: '\\u03A8',\n\tpsi: '\\u03C8',\n\tpuncsp: '\\u2008',\n\tQfr: '\\uD835\\uDD14',\n\tqfr: '\\uD835\\uDD2E',\n\tqint: '\\u2A0C',\n\tQopf: '\\u211A',\n\tqopf: '\\uD835\\uDD62',\n\tqprime: '\\u2057',\n\tQscr: '\\uD835\\uDCAC',\n\tqscr: '\\uD835\\uDCC6',\n\tquaternions: '\\u210D',\n\tquatint: '\\u2A16',\n\tquest: '\\u003F',\n\tquesteq: '\\u225F',\n\tQUOT: '\\u0022',\n\tquot: '\\u0022',\n\trAarr: '\\u21DB',\n\trace: '\\u223D\\u0331',\n\tRacute: '\\u0154',\n\tracute: '\\u0155',\n\tradic: '\\u221A',\n\traemptyv: '\\u29B3',\n\tRang: '\\u27EB',\n\trang: '\\u27E9',\n\trangd: '\\u2992',\n\trange: '\\u29A5',\n\trangle: '\\u27E9',\n\traquo: '\\u00BB',\n\tRarr: '\\u21A0',\n\trArr: '\\u21D2',\n\trarr: '\\u2192',\n\trarrap: '\\u2975',\n\trarrb: '\\u21E5',\n\trarrbfs: '\\u2920',\n\trarrc: '\\u2933',\n\trarrfs: '\\u291E',\n\trarrhk: '\\u21AA',\n\trarrlp: '\\u21AC',\n\trarrpl: '\\u2945',\n\trarrsim: '\\u2974',\n\tRarrtl: '\\u2916',\n\trarrtl: '\\u21A3',\n\trarrw: '\\u219D',\n\trAtail: '\\u291C',\n\tratail: '\\u291A',\n\tratio: '\\u2236',\n\trationals: '\\u211A',\n\tRBarr: '\\u2910',\n\trBarr: '\\u290F',\n\trbarr: '\\u290D',\n\trbbrk: '\\u2773',\n\trbrace: '\\u007D',\n\trbrack: '\\u005D',\n\trbrke: '\\u298C',\n\trbrksld: '\\u298E',\n\trbrkslu: '\\u2990',\n\tRcaron: '\\u0158',\n\trcaron: '\\u0159',\n\tRcedil: '\\u0156',\n\trcedil: '\\u0157',\n\trceil: '\\u2309',\n\trcub: '\\u007D',\n\tRcy: '\\u0420',\n\trcy: '\\u0440',\n\trdca: '\\u2937',\n\trdldhar: '\\u2969',\n\trdquo: '\\u201D',\n\trdquor: '\\u201D',\n\trdsh: '\\u21B3',\n\tRe: '\\u211C',\n\treal: '\\u211C',\n\trealine: '\\u211B',\n\trealpart: '\\u211C',\n\treals: '\\u211D',\n\trect: '\\u25AD',\n\tREG: '\\u00AE',\n\treg: '\\u00AE',\n\tReverseElement: '\\u220B',\n\tReverseEquilibrium: '\\u21CB',\n\tReverseUpEquilibrium: '\\u296F',\n\trfisht: '\\u297D',\n\trfloor: '\\u230B',\n\tRfr: '\\u211C',\n\trfr: '\\uD835\\uDD2F',\n\trHar: '\\u2964',\n\trhard: '\\u21C1',\n\trharu: '\\u21C0',\n\trharul: '\\u296C',\n\tRho: '\\u03A1',\n\trho: '\\u03C1',\n\trhov: '\\u03F1',\n\tRightAngleBracket: '\\u27E9',\n\tRightArrow: '\\u2192',\n\tRightarrow: '\\u21D2',\n\trightarrow: '\\u2192',\n\tRightArrowBar: '\\u21E5',\n\tRightArrowLeftArrow: '\\u21C4',\n\trightarrowtail: '\\u21A3',\n\tRightCeiling: '\\u2309',\n\tRightDoubleBracket: '\\u27E7',\n\tRightDownTeeVector: '\\u295D',\n\tRightDownVector: '\\u21C2',\n\tRightDownVectorBar: '\\u2955',\n\tRightFloor: '\\u230B',\n\trightharpoondown: '\\u21C1',\n\trightharpoonup: '\\u21C0',\n\trightleftarrows: '\\u21C4',\n\trightleftharpoons: '\\u21CC',\n\trightrightarrows: '\\u21C9',\n\trightsquigarrow: '\\u219D',\n\tRightTee: '\\u22A2',\n\tRightTeeArrow: '\\u21A6',\n\tRightTeeVector: '\\u295B',\n\trightthreetimes: '\\u22CC',\n\tRightTriangle: '\\u22B3',\n\tRightTriangleBar: '\\u29D0',\n\tRightTriangleEqual: '\\u22B5',\n\tRightUpDownVector: '\\u294F',\n\tRightUpTeeVector: '\\u295C',\n\tRightUpVector: '\\u21BE',\n\tRightUpVectorBar: '\\u2954',\n\tRightVector: '\\u21C0',\n\tRightVectorBar: '\\u2953',\n\tring: '\\u02DA',\n\trisingdotseq: '\\u2253',\n\trlarr: '\\u21C4',\n\trlhar: '\\u21CC',\n\trlm: '\\u200F',\n\trmoust: '\\u23B1',\n\trmoustache: '\\u23B1',\n\trnmid: '\\u2AEE',\n\troang: '\\u27ED',\n\troarr: '\\u21FE',\n\trobrk: '\\u27E7',\n\tropar: '\\u2986',\n\tRopf: '\\u211D',\n\tropf: '\\uD835\\uDD63',\n\troplus: '\\u2A2E',\n\trotimes: '\\u2A35',\n\tRoundImplies: '\\u2970',\n\trpar: '\\u0029',\n\trpargt: '\\u2994',\n\trppolint: '\\u2A12',\n\trrarr: '\\u21C9',\n\tRrightarrow: '\\u21DB',\n\trsaquo: '\\u203A',\n\tRscr: '\\u211B',\n\trscr: '\\uD835\\uDCC7',\n\tRsh: '\\u21B1',\n\trsh: '\\u21B1',\n\trsqb: '\\u005D',\n\trsquo: '\\u2019',\n\trsquor: '\\u2019',\n\trthree: '\\u22CC',\n\trtimes: '\\u22CA',\n\trtri: '\\u25B9',\n\trtrie: '\\u22B5',\n\trtrif: '\\u25B8',\n\trtriltri: '\\u29CE',\n\tRuleDelayed: '\\u29F4',\n\truluhar: '\\u2968',\n\trx: '\\u211E',\n\tSacute: '\\u015A',\n\tsacute: '\\u015B',\n\tsbquo: '\\u201A',\n\tSc: '\\u2ABC',\n\tsc: '\\u227B',\n\tscap: '\\u2AB8',\n\tScaron: '\\u0160',\n\tscaron: '\\u0161',\n\tsccue: '\\u227D',\n\tscE: '\\u2AB4',\n\tsce: '\\u2AB0',\n\tScedil: '\\u015E',\n\tscedil: '\\u015F',\n\tScirc: '\\u015C',\n\tscirc: '\\u015D',\n\tscnap: '\\u2ABA',\n\tscnE: '\\u2AB6',\n\tscnsim: '\\u22E9',\n\tscpolint: '\\u2A13',\n\tscsim: '\\u227F',\n\tScy: '\\u0421',\n\tscy: '\\u0441',\n\tsdot: '\\u22C5',\n\tsdotb: '\\u22A1',\n\tsdote: '\\u2A66',\n\tsearhk: '\\u2925',\n\tseArr: '\\u21D8',\n\tsearr: '\\u2198',\n\tsearrow: '\\u2198',\n\tsect: '\\u00A7',\n\tsemi: '\\u003B',\n\tseswar: '\\u2929',\n\tsetminus: '\\u2216',\n\tsetmn: '\\u2216',\n\tsext: '\\u2736',\n\tSfr: '\\uD835\\uDD16',\n\tsfr: '\\uD835\\uDD30',\n\tsfrown: '\\u2322',\n\tsharp: '\\u266F',\n\tSHCHcy: '\\u0429',\n\tshchcy: '\\u0449',\n\tSHcy: '\\u0428',\n\tshcy: '\\u0448',\n\tShortDownArrow: '\\u2193',\n\tShortLeftArrow: '\\u2190',\n\tshortmid: '\\u2223',\n\tshortparallel: '\\u2225',\n\tShortRightArrow: '\\u2192',\n\tShortUpArrow: '\\u2191',\n\tshy: '\\u00AD',\n\tSigma: '\\u03A3',\n\tsigma: '\\u03C3',\n\tsigmaf: '\\u03C2',\n\tsigmav: '\\u03C2',\n\tsim: '\\u223C',\n\tsimdot: '\\u2A6A',\n\tsime: '\\u2243',\n\tsimeq: '\\u2243',\n\tsimg: '\\u2A9E',\n\tsimgE: '\\u2AA0',\n\tsiml: '\\u2A9D',\n\tsimlE: '\\u2A9F',\n\tsimne: '\\u2246',\n\tsimplus: '\\u2A24',\n\tsimrarr: '\\u2972',\n\tslarr: '\\u2190',\n\tSmallCircle: '\\u2218',\n\tsmallsetminus: '\\u2216',\n\tsmashp: '\\u2A33',\n\tsmeparsl: '\\u29E4',\n\tsmid: '\\u2223',\n\tsmile: '\\u2323',\n\tsmt: '\\u2AAA',\n\tsmte: '\\u2AAC',\n\tsmtes: '\\u2AAC\\uFE00',\n\tSOFTcy: '\\u042C',\n\tsoftcy: '\\u044C',\n\tsol: '\\u002F',\n\tsolb: '\\u29C4',\n\tsolbar: '\\u233F',\n\tSopf: '\\uD835\\uDD4A',\n\tsopf: '\\uD835\\uDD64',\n\tspades: '\\u2660',\n\tspadesuit: '\\u2660',\n\tspar: '\\u2225',\n\tsqcap: '\\u2293',\n\tsqcaps: '\\u2293\\uFE00',\n\tsqcup: '\\u2294',\n\tsqcups: '\\u2294\\uFE00',\n\tSqrt: '\\u221A',\n\tsqsub: '\\u228F',\n\tsqsube: '\\u2291',\n\tsqsubset: '\\u228F',\n\tsqsubseteq: '\\u2291',\n\tsqsup: '\\u2290',\n\tsqsupe: '\\u2292',\n\tsqsupset: '\\u2290',\n\tsqsupseteq: '\\u2292',\n\tsqu: '\\u25A1',\n\tSquare: '\\u25A1',\n\tsquare: '\\u25A1',\n\tSquareIntersection: '\\u2293',\n\tSquareSubset: '\\u228F',\n\tSquareSubsetEqual: '\\u2291',\n\tSquareSuperset: '\\u2290',\n\tSquareSupersetEqual: '\\u2292',\n\tSquareUnion: '\\u2294',\n\tsquarf: '\\u25AA',\n\tsquf: '\\u25AA',\n\tsrarr: '\\u2192',\n\tSscr: '\\uD835\\uDCAE',\n\tsscr: '\\uD835\\uDCC8',\n\tssetmn: '\\u2216',\n\tssmile: '\\u2323',\n\tsstarf: '\\u22C6',\n\tStar: '\\u22C6',\n\tstar: '\\u2606',\n\tstarf: '\\u2605',\n\tstraightepsilon: '\\u03F5',\n\tstraightphi: '\\u03D5',\n\tstrns: '\\u00AF',\n\tSub: '\\u22D0',\n\tsub: '\\u2282',\n\tsubdot: '\\u2ABD',\n\tsubE: '\\u2AC5',\n\tsube: '\\u2286',\n\tsubedot: '\\u2AC3',\n\tsubmult: '\\u2AC1',\n\tsubnE: '\\u2ACB',\n\tsubne: '\\u228A',\n\tsubplus: '\\u2ABF',\n\tsubrarr: '\\u2979',\n\tSubset: '\\u22D0',\n\tsubset: '\\u2282',\n\tsubseteq: '\\u2286',\n\tsubseteqq: '\\u2AC5',\n\tSubsetEqual: '\\u2286',\n\tsubsetneq: '\\u228A',\n\tsubsetneqq: '\\u2ACB',\n\tsubsim: '\\u2AC7',\n\tsubsub: '\\u2AD5',\n\tsubsup: '\\u2AD3',\n\tsucc: '\\u227B',\n\tsuccapprox: '\\u2AB8',\n\tsucccurlyeq: '\\u227D',\n\tSucceeds: '\\u227B',\n\tSucceedsEqual: '\\u2AB0',\n\tSucceedsSlantEqual: '\\u227D',\n\tSucceedsTilde: '\\u227F',\n\tsucceq: '\\u2AB0',\n\tsuccnapprox: '\\u2ABA',\n\tsuccneqq: '\\u2AB6',\n\tsuccnsim: '\\u22E9',\n\tsuccsim: '\\u227F',\n\tSuchThat: '\\u220B',\n\tSum: '\\u2211',\n\tsum: '\\u2211',\n\tsung: '\\u266A',\n\tSup: '\\u22D1',\n\tsup: '\\u2283',\n\tsup1: '\\u00B9',\n\tsup2: '\\u00B2',\n\tsup3: '\\u00B3',\n\tsupdot: '\\u2ABE',\n\tsupdsub: '\\u2AD8',\n\tsupE: '\\u2AC6',\n\tsupe: '\\u2287',\n\tsupedot: '\\u2AC4',\n\tSuperset: '\\u2283',\n\tSupersetEqual: '\\u2287',\n\tsuphsol: '\\u27C9',\n\tsuphsub: '\\u2AD7',\n\tsuplarr: '\\u297B',\n\tsupmult: '\\u2AC2',\n\tsupnE: '\\u2ACC',\n\tsupne: '\\u228B',\n\tsupplus: '\\u2AC0',\n\tSupset: '\\u22D1',\n\tsupset: '\\u2283',\n\tsupseteq: '\\u2287',\n\tsupseteqq: '\\u2AC6',\n\tsupsetneq: '\\u228B',\n\tsupsetneqq: '\\u2ACC',\n\tsupsim: '\\u2AC8',\n\tsupsub: '\\u2AD4',\n\tsupsup: '\\u2AD6',\n\tswarhk: '\\u2926',\n\tswArr: '\\u21D9',\n\tswarr: '\\u2199',\n\tswarrow: '\\u2199',\n\tswnwar: '\\u292A',\n\tszlig: '\\u00DF',\n\tTab: '\\u0009',\n\ttarget: '\\u2316',\n\tTau: '\\u03A4',\n\ttau: '\\u03C4',\n\ttbrk: '\\u23B4',\n\tTcaron: '\\u0164',\n\ttcaron: '\\u0165',\n\tTcedil: '\\u0162',\n\ttcedil: '\\u0163',\n\tTcy: '\\u0422',\n\ttcy: '\\u0442',\n\ttdot: '\\u20DB',\n\ttelrec: '\\u2315',\n\tTfr: '\\uD835\\uDD17',\n\ttfr: '\\uD835\\uDD31',\n\tthere4: '\\u2234',\n\tTherefore: '\\u2234',\n\ttherefore: '\\u2234',\n\tTheta: '\\u0398',\n\ttheta: '\\u03B8',\n\tthetasym: '\\u03D1',\n\tthetav: '\\u03D1',\n\tthickapprox: '\\u2248',\n\tthicksim: '\\u223C',\n\tThickSpace: '\\u205F\\u200A',\n\tthinsp: '\\u2009',\n\tThinSpace: '\\u2009',\n\tthkap: '\\u2248',\n\tthksim: '\\u223C',\n\tTHORN: '\\u00DE',\n\tthorn: '\\u00FE',\n\tTilde: '\\u223C',\n\ttilde: '\\u02DC',\n\tTildeEqual: '\\u2243',\n\tTildeFullEqual: '\\u2245',\n\tTildeTilde: '\\u2248',\n\ttimes: '\\u00D7',\n\ttimesb: '\\u22A0',\n\ttimesbar: '\\u2A31',\n\ttimesd: '\\u2A30',\n\ttint: '\\u222D',\n\ttoea: '\\u2928',\n\ttop: '\\u22A4',\n\ttopbot: '\\u2336',\n\ttopcir: '\\u2AF1',\n\tTopf: '\\uD835\\uDD4B',\n\ttopf: '\\uD835\\uDD65',\n\ttopfork: '\\u2ADA',\n\ttosa: '\\u2929',\n\ttprime: '\\u2034',\n\tTRADE: '\\u2122',\n\ttrade: '\\u2122',\n\ttriangle: '\\u25B5',\n\ttriangledown: '\\u25BF',\n\ttriangleleft: '\\u25C3',\n\ttrianglelefteq: '\\u22B4',\n\ttriangleq: '\\u225C',\n\ttriangleright: '\\u25B9',\n\ttrianglerighteq: '\\u22B5',\n\ttridot: '\\u25EC',\n\ttrie: '\\u225C',\n\ttriminus: '\\u2A3A',\n\tTripleDot: '\\u20DB',\n\ttriplus: '\\u2A39',\n\ttrisb: '\\u29CD',\n\ttritime: '\\u2A3B',\n\ttrpezium: '\\u23E2',\n\tTscr: '\\uD835\\uDCAF',\n\ttscr: '\\uD835\\uDCC9',\n\tTScy: '\\u0426',\n\ttscy: '\\u0446',\n\tTSHcy: '\\u040B',\n\ttshcy: '\\u045B',\n\tTstrok: '\\u0166',\n\ttstrok: '\\u0167',\n\ttwixt: '\\u226C',\n\ttwoheadleftarrow: '\\u219E',\n\ttwoheadrightarrow: '\\u21A0',\n\tUacute: '\\u00DA',\n\tuacute: '\\u00FA',\n\tUarr: '\\u219F',\n\tuArr: '\\u21D1',\n\tuarr: '\\u2191',\n\tUarrocir: '\\u2949',\n\tUbrcy: '\\u040E',\n\tubrcy: '\\u045E',\n\tUbreve: '\\u016C',\n\tubreve: '\\u016D',\n\tUcirc: '\\u00DB',\n\tucirc: '\\u00FB',\n\tUcy: '\\u0423',\n\tucy: '\\u0443',\n\tudarr: '\\u21C5',\n\tUdblac: '\\u0170',\n\tudblac: '\\u0171',\n\tudhar: '\\u296E',\n\tufisht: '\\u297E',\n\tUfr: '\\uD835\\uDD18',\n\tufr: '\\uD835\\uDD32',\n\tUgrave: '\\u00D9',\n\tugrave: '\\u00F9',\n\tuHar: '\\u2963',\n\tuharl: '\\u21BF',\n\tuharr: '\\u21BE',\n\tuhblk: '\\u2580',\n\tulcorn: '\\u231C',\n\tulcorner: '\\u231C',\n\tulcrop: '\\u230F',\n\tultri: '\\u25F8',\n\tUmacr: '\\u016A',\n\tumacr: '\\u016B',\n\tuml: '\\u00A8',\n\tUnderBar: '\\u005F',\n\tUnderBrace: '\\u23DF',\n\tUnderBracket: '\\u23B5',\n\tUnderParenthesis: '\\u23DD',\n\tUnion: '\\u22C3',\n\tUnionPlus: '\\u228E',\n\tUogon: '\\u0172',\n\tuogon: '\\u0173',\n\tUopf: '\\uD835\\uDD4C',\n\tuopf: '\\uD835\\uDD66',\n\tUpArrow: '\\u2191',\n\tUparrow: '\\u21D1',\n\tuparrow: '\\u2191',\n\tUpArrowBar: '\\u2912',\n\tUpArrowDownArrow: '\\u21C5',\n\tUpDownArrow: '\\u2195',\n\tUpdownarrow: '\\u21D5',\n\tupdownarrow: '\\u2195',\n\tUpEquilibrium: '\\u296E',\n\tupharpoonleft: '\\u21BF',\n\tupharpoonright: '\\u21BE',\n\tuplus: '\\u228E',\n\tUpperLeftArrow: '\\u2196',\n\tUpperRightArrow: '\\u2197',\n\tUpsi: '\\u03D2',\n\tupsi: '\\u03C5',\n\tupsih: '\\u03D2',\n\tUpsilon: '\\u03A5',\n\tupsilon: '\\u03C5',\n\tUpTee: '\\u22A5',\n\tUpTeeArrow: '\\u21A5',\n\tupuparrows: '\\u21C8',\n\turcorn: '\\u231D',\n\turcorner: '\\u231D',\n\turcrop: '\\u230E',\n\tUring: '\\u016E',\n\turing: '\\u016F',\n\turtri: '\\u25F9',\n\tUscr: '\\uD835\\uDCB0',\n\tuscr: '\\uD835\\uDCCA',\n\tutdot: '\\u22F0',\n\tUtilde: '\\u0168',\n\tutilde: '\\u0169',\n\tutri: '\\u25B5',\n\tutrif: '\\u25B4',\n\tuuarr: '\\u21C8',\n\tUuml: '\\u00DC',\n\tuuml: '\\u00FC',\n\tuwangle: '\\u29A7',\n\tvangrt: '\\u299C',\n\tvarepsilon: '\\u03F5',\n\tvarkappa: '\\u03F0',\n\tvarnothing: '\\u2205',\n\tvarphi: '\\u03D5',\n\tvarpi: '\\u03D6',\n\tvarpropto: '\\u221D',\n\tvArr: '\\u21D5',\n\tvarr: '\\u2195',\n\tvarrho: '\\u03F1',\n\tvarsigma: '\\u03C2',\n\tvarsubsetneq: '\\u228A\\uFE00',\n\tvarsubsetneqq: '\\u2ACB\\uFE00',\n\tvarsupsetneq: '\\u228B\\uFE00',\n\tvarsupsetneqq: '\\u2ACC\\uFE00',\n\tvartheta: '\\u03D1',\n\tvartriangleleft: '\\u22B2',\n\tvartriangleright: '\\u22B3',\n\tVbar: '\\u2AEB',\n\tvBar: '\\u2AE8',\n\tvBarv: '\\u2AE9',\n\tVcy: '\\u0412',\n\tvcy: '\\u0432',\n\tVDash: '\\u22AB',\n\tVdash: '\\u22A9',\n\tvDash: '\\u22A8',\n\tvdash: '\\u22A2',\n\tVdashl: '\\u2AE6',\n\tVee: '\\u22C1',\n\tvee: '\\u2228',\n\tveebar: '\\u22BB',\n\tveeeq: '\\u225A',\n\tvellip: '\\u22EE',\n\tVerbar: '\\u2016',\n\tverbar: '\\u007C',\n\tVert: '\\u2016',\n\tvert: '\\u007C',\n\tVerticalBar: '\\u2223',\n\tVerticalLine: '\\u007C',\n\tVerticalSeparator: '\\u2758',\n\tVerticalTilde: '\\u2240',\n\tVeryThinSpace: '\\u200A',\n\tVfr: '\\uD835\\uDD19',\n\tvfr: '\\uD835\\uDD33',\n\tvltri: '\\u22B2',\n\tvnsub: '\\u2282\\u20D2',\n\tvnsup: '\\u2283\\u20D2',\n\tVopf: '\\uD835\\uDD4D',\n\tvopf: '\\uD835\\uDD67',\n\tvprop: '\\u221D',\n\tvrtri: '\\u22B3',\n\tVscr: '\\uD835\\uDCB1',\n\tvscr: '\\uD835\\uDCCB',\n\tvsubnE: '\\u2ACB\\uFE00',\n\tvsubne: '\\u228A\\uFE00',\n\tvsupnE: '\\u2ACC\\uFE00',\n\tvsupne: '\\u228B\\uFE00',\n\tVvdash: '\\u22AA',\n\tvzigzag: '\\u299A',\n\tWcirc: '\\u0174',\n\twcirc: '\\u0175',\n\twedbar: '\\u2A5F',\n\tWedge: '\\u22C0',\n\twedge: '\\u2227',\n\twedgeq: '\\u2259',\n\tweierp: '\\u2118',\n\tWfr: '\\uD835\\uDD1A',\n\twfr: '\\uD835\\uDD34',\n\tWopf: '\\uD835\\uDD4E',\n\twopf: '\\uD835\\uDD68',\n\twp: '\\u2118',\n\twr: '\\u2240',\n\twreath: '\\u2240',\n\tWscr: '\\uD835\\uDCB2',\n\twscr: '\\uD835\\uDCCC',\n\txcap: '\\u22C2',\n\txcirc: '\\u25EF',\n\txcup: '\\u22C3',\n\txdtri: '\\u25BD',\n\tXfr: '\\uD835\\uDD1B',\n\txfr: '\\uD835\\uDD35',\n\txhArr: '\\u27FA',\n\txharr: '\\u27F7',\n\tXi: '\\u039E',\n\txi: '\\u03BE',\n\txlArr: '\\u27F8',\n\txlarr: '\\u27F5',\n\txmap: '\\u27FC',\n\txnis: '\\u22FB',\n\txodot: '\\u2A00',\n\tXopf: '\\uD835\\uDD4F',\n\txopf: '\\uD835\\uDD69',\n\txoplus: '\\u2A01',\n\txotime: '\\u2A02',\n\txrArr: '\\u27F9',\n\txrarr: '\\u27F6',\n\tXscr: '\\uD835\\uDCB3',\n\txscr: '\\uD835\\uDCCD',\n\txsqcup: '\\u2A06',\n\txuplus: '\\u2A04',\n\txutri: '\\u25B3',\n\txvee: '\\u22C1',\n\txwedge: '\\u22C0',\n\tYacute: '\\u00DD',\n\tyacute: '\\u00FD',\n\tYAcy: '\\u042F',\n\tyacy: '\\u044F',\n\tYcirc: '\\u0176',\n\tycirc: '\\u0177',\n\tYcy: '\\u042B',\n\tycy: '\\u044B',\n\tyen: '\\u00A5',\n\tYfr: '\\uD835\\uDD1C',\n\tyfr: '\\uD835\\uDD36',\n\tYIcy: '\\u0407',\n\tyicy: '\\u0457',\n\tYopf: '\\uD835\\uDD50',\n\tyopf: '\\uD835\\uDD6A',\n\tYscr: '\\uD835\\uDCB4',\n\tyscr: '\\uD835\\uDCCE',\n\tYUcy: '\\u042E',\n\tyucy: '\\u044E',\n\tYuml: '\\u0178',\n\tyuml: '\\u00FF',\n\tZacute: '\\u0179',\n\tzacute: '\\u017A',\n\tZcaron: '\\u017D',\n\tzcaron: '\\u017E',\n\tZcy: '\\u0417',\n\tzcy: '\\u0437',\n\tZdot: '\\u017B',\n\tzdot: '\\u017C',\n\tzeetrf: '\\u2128',\n\tZeroWidthSpace: '\\u200B',\n\tZeta: '\\u0396',\n\tzeta: '\\u03B6',\n\tZfr: '\\u2128',\n\tzfr: '\\uD835\\uDD37',\n\tZHcy: '\\u0416',\n\tzhcy: '\\u0436',\n\tzigrarr: '\\u21DD',\n\tZopf: '\\u2124',\n\tzopf: '\\uD835\\uDD6B',\n\tZscr: '\\uD835\\uDCB5',\n\tzscr: '\\uD835\\uDCCF',\n\tzwj: '\\u200D',\n\tzwnj: '\\u200C',\n});\n\n/**\n * @deprecated use `HTML_ENTITIES` instead\n * @see HTML_ENTITIES\n */\nexports.entityMap = exports.HTML_ENTITIES;\n","import { auto } from \"../enums.js\";\nexport default function getBasePlacement(placement) {\n  return placement.split('-')[0];\n}","import getWindow from \"./getWindow.js\";\nexport default function getComputedStyle(element) {\n  return getWindow(element).getComputedStyle(element);\n}","'use strict';\n\nvar utils = require('../utils');\nvar common = require('../common');\nvar assert = require('minimalistic-assert');\n\nvar rotr64_hi = utils.rotr64_hi;\nvar rotr64_lo = utils.rotr64_lo;\nvar shr64_hi = utils.shr64_hi;\nvar shr64_lo = utils.shr64_lo;\nvar sum64 = utils.sum64;\nvar sum64_hi = utils.sum64_hi;\nvar sum64_lo = utils.sum64_lo;\nvar sum64_4_hi = utils.sum64_4_hi;\nvar sum64_4_lo = utils.sum64_4_lo;\nvar sum64_5_hi = utils.sum64_5_hi;\nvar sum64_5_lo = utils.sum64_5_lo;\n\nvar BlockHash = common.BlockHash;\n\nvar sha512_K = [\n  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,\n  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,\n  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,\n  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,\n  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,\n  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,\n  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,\n  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,\n  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,\n  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,\n  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,\n  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,\n  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,\n  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,\n  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,\n  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,\n  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,\n  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,\n  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,\n  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,\n  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,\n  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,\n  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,\n  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,\n  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,\n  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,\n  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,\n  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,\n  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,\n  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,\n  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,\n  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,\n  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,\n  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,\n  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,\n  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,\n  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,\n  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,\n  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,\n  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817\n];\n\nfunction SHA512() {\n  if (!(this instanceof SHA512))\n    return new SHA512();\n\n  BlockHash.call(this);\n  this.h = [\n    0x6a09e667, 0xf3bcc908,\n    0xbb67ae85, 0x84caa73b,\n    0x3c6ef372, 0xfe94f82b,\n    0xa54ff53a, 0x5f1d36f1,\n    0x510e527f, 0xade682d1,\n    0x9b05688c, 0x2b3e6c1f,\n    0x1f83d9ab, 0xfb41bd6b,\n    0x5be0cd19, 0x137e2179 ];\n  this.k = sha512_K;\n  this.W = new Array(160);\n}\nutils.inherits(SHA512, BlockHash);\nmodule.exports = SHA512;\n\nSHA512.blockSize = 1024;\nSHA512.outSize = 512;\nSHA512.hmacStrength = 192;\nSHA512.padLength = 128;\n\nSHA512.prototype._prepareBlock = function _prepareBlock(msg, start) {\n  var W = this.W;\n\n  // 32 x 32bit words\n  for (var i = 0; i < 32; i++)\n    W[i] = msg[start + i];\n  for (; i < W.length; i += 2) {\n    var c0_hi = g1_512_hi(W[i - 4], W[i - 3]);  // i - 2\n    var c0_lo = g1_512_lo(W[i - 4], W[i - 3]);\n    var c1_hi = W[i - 14];  // i - 7\n    var c1_lo = W[i - 13];\n    var c2_hi = g0_512_hi(W[i - 30], W[i - 29]);  // i - 15\n    var c2_lo = g0_512_lo(W[i - 30], W[i - 29]);\n    var c3_hi = W[i - 32];  // i - 16\n    var c3_lo = W[i - 31];\n\n    W[i] = sum64_4_hi(\n      c0_hi, c0_lo,\n      c1_hi, c1_lo,\n      c2_hi, c2_lo,\n      c3_hi, c3_lo);\n    W[i + 1] = sum64_4_lo(\n      c0_hi, c0_lo,\n      c1_hi, c1_lo,\n      c2_hi, c2_lo,\n      c3_hi, c3_lo);\n  }\n};\n\nSHA512.prototype._update = function _update(msg, start) {\n  this._prepareBlock(msg, start);\n\n  var W = this.W;\n\n  var ah = this.h[0];\n  var al = this.h[1];\n  var bh = this.h[2];\n  var bl = this.h[3];\n  var ch = this.h[4];\n  var cl = this.h[5];\n  var dh = this.h[6];\n  var dl = this.h[7];\n  var eh = this.h[8];\n  var el = this.h[9];\n  var fh = this.h[10];\n  var fl = this.h[11];\n  var gh = this.h[12];\n  var gl = this.h[13];\n  var hh = this.h[14];\n  var hl = this.h[15];\n\n  assert(this.k.length === W.length);\n  for (var i = 0; i < W.length; i += 2) {\n    var c0_hi = hh;\n    var c0_lo = hl;\n    var c1_hi = s1_512_hi(eh, el);\n    var c1_lo = s1_512_lo(eh, el);\n    var c2_hi = ch64_hi(eh, el, fh, fl, gh, gl);\n    var c2_lo = ch64_lo(eh, el, fh, fl, gh, gl);\n    var c3_hi = this.k[i];\n    var c3_lo = this.k[i + 1];\n    var c4_hi = W[i];\n    var c4_lo = W[i + 1];\n\n    var T1_hi = sum64_5_hi(\n      c0_hi, c0_lo,\n      c1_hi, c1_lo,\n      c2_hi, c2_lo,\n      c3_hi, c3_lo,\n      c4_hi, c4_lo);\n    var T1_lo = sum64_5_lo(\n      c0_hi, c0_lo,\n      c1_hi, c1_lo,\n      c2_hi, c2_lo,\n      c3_hi, c3_lo,\n      c4_hi, c4_lo);\n\n    c0_hi = s0_512_hi(ah, al);\n    c0_lo = s0_512_lo(ah, al);\n    c1_hi = maj64_hi(ah, al, bh, bl, ch, cl);\n    c1_lo = maj64_lo(ah, al, bh, bl, ch, cl);\n\n    var T2_hi = sum64_hi(c0_hi, c0_lo, c1_hi, c1_lo);\n    var T2_lo = sum64_lo(c0_hi, c0_lo, c1_hi, c1_lo);\n\n    hh = gh;\n    hl = gl;\n\n    gh = fh;\n    gl = fl;\n\n    fh = eh;\n    fl = el;\n\n    eh = sum64_hi(dh, dl, T1_hi, T1_lo);\n    el = sum64_lo(dl, dl, T1_hi, T1_lo);\n\n    dh = ch;\n    dl = cl;\n\n    ch = bh;\n    cl = bl;\n\n    bh = ah;\n    bl = al;\n\n    ah = sum64_hi(T1_hi, T1_lo, T2_hi, T2_lo);\n    al = sum64_lo(T1_hi, T1_lo, T2_hi, T2_lo);\n  }\n\n  sum64(this.h, 0, ah, al);\n  sum64(this.h, 2, bh, bl);\n  sum64(this.h, 4, ch, cl);\n  sum64(this.h, 6, dh, dl);\n  sum64(this.h, 8, eh, el);\n  sum64(this.h, 10, fh, fl);\n  sum64(this.h, 12, gh, gl);\n  sum64(this.h, 14, hh, hl);\n};\n\nSHA512.prototype._digest = function digest(enc) {\n  if (enc === 'hex')\n    return utils.toHex32(this.h, 'big');\n  else\n    return utils.split32(this.h, 'big');\n};\n\nfunction ch64_hi(xh, xl, yh, yl, zh) {\n  var r = (xh & yh) ^ ((~xh) & zh);\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction ch64_lo(xh, xl, yh, yl, zh, zl) {\n  var r = (xl & yl) ^ ((~xl) & zl);\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction maj64_hi(xh, xl, yh, yl, zh) {\n  var r = (xh & yh) ^ (xh & zh) ^ (yh & zh);\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction maj64_lo(xh, xl, yh, yl, zh, zl) {\n  var r = (xl & yl) ^ (xl & zl) ^ (yl & zl);\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction s0_512_hi(xh, xl) {\n  var c0_hi = rotr64_hi(xh, xl, 28);\n  var c1_hi = rotr64_hi(xl, xh, 2);  // 34\n  var c2_hi = rotr64_hi(xl, xh, 7);  // 39\n\n  var r = c0_hi ^ c1_hi ^ c2_hi;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction s0_512_lo(xh, xl) {\n  var c0_lo = rotr64_lo(xh, xl, 28);\n  var c1_lo = rotr64_lo(xl, xh, 2);  // 34\n  var c2_lo = rotr64_lo(xl, xh, 7);  // 39\n\n  var r = c0_lo ^ c1_lo ^ c2_lo;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction s1_512_hi(xh, xl) {\n  var c0_hi = rotr64_hi(xh, xl, 14);\n  var c1_hi = rotr64_hi(xh, xl, 18);\n  var c2_hi = rotr64_hi(xl, xh, 9);  // 41\n\n  var r = c0_hi ^ c1_hi ^ c2_hi;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction s1_512_lo(xh, xl) {\n  var c0_lo = rotr64_lo(xh, xl, 14);\n  var c1_lo = rotr64_lo(xh, xl, 18);\n  var c2_lo = rotr64_lo(xl, xh, 9);  // 41\n\n  var r = c0_lo ^ c1_lo ^ c2_lo;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction g0_512_hi(xh, xl) {\n  var c0_hi = rotr64_hi(xh, xl, 1);\n  var c1_hi = rotr64_hi(xh, xl, 8);\n  var c2_hi = shr64_hi(xh, xl, 7);\n\n  var r = c0_hi ^ c1_hi ^ c2_hi;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction g0_512_lo(xh, xl) {\n  var c0_lo = rotr64_lo(xh, xl, 1);\n  var c1_lo = rotr64_lo(xh, xl, 8);\n  var c2_lo = shr64_lo(xh, xl, 7);\n\n  var r = c0_lo ^ c1_lo ^ c2_lo;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction g1_512_hi(xh, xl) {\n  var c0_hi = rotr64_hi(xh, xl, 19);\n  var c1_hi = rotr64_hi(xl, xh, 29);  // 61\n  var c2_hi = shr64_hi(xh, xl, 6);\n\n  var r = c0_hi ^ c1_hi ^ c2_hi;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n\nfunction g1_512_lo(xh, xl) {\n  var c0_lo = rotr64_lo(xh, xl, 19);\n  var c1_lo = rotr64_lo(xl, xh, 29);  // 61\n  var c2_lo = shr64_lo(xh, xl, 6);\n\n  var r = c0_lo ^ c1_lo ^ c2_lo;\n  if (r < 0)\n    r += 0x100000000;\n  return r;\n}\n","'use strict';\n\nvar ExpGolomb;\n\n/**\n * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n * scheme used by h264.\n */\nExpGolomb = function(workingData) {\n  var\n    // the number of bytes left to examine in workingData\n    workingBytesAvailable = workingData.byteLength,\n\n    // the current word being examined\n    workingWord = 0, // :uint\n\n    // the number of bits left to examine in the current word\n    workingBitsAvailable = 0; // :uint;\n\n  // ():uint\n  this.length = function() {\n    return (8 * workingBytesAvailable);\n  };\n\n  // ():uint\n  this.bitsAvailable = function() {\n    return (8 * workingBytesAvailable) + workingBitsAvailable;\n  };\n\n  // ():void\n  this.loadWord = function() {\n    var\n      position = workingData.byteLength - workingBytesAvailable,\n      workingBytes = new Uint8Array(4),\n      availableBytes = Math.min(4, workingBytesAvailable);\n\n    if (availableBytes === 0) {\n      throw new Error('no bytes available');\n    }\n\n    workingBytes.set(workingData.subarray(position,\n                                          position + availableBytes));\n    workingWord = new DataView(workingBytes.buffer).getUint32(0);\n\n    // track the amount of workingData that has been processed\n    workingBitsAvailable = availableBytes * 8;\n    workingBytesAvailable -= availableBytes;\n  };\n\n  // (count:int):void\n  this.skipBits = function(count) {\n    var skipBytes; // :int\n    if (workingBitsAvailable > count) {\n      workingWord          <<= count;\n      workingBitsAvailable -= count;\n    } else {\n      count -= workingBitsAvailable;\n      skipBytes = Math.floor(count / 8);\n\n      count -= (skipBytes * 8);\n      workingBytesAvailable -= skipBytes;\n\n      this.loadWord();\n\n      workingWord <<= count;\n      workingBitsAvailable -= count;\n    }\n  };\n\n  // (size:int):uint\n  this.readBits = function(size) {\n    var\n      bits = Math.min(workingBitsAvailable, size), // :uint\n      valu = workingWord >>> (32 - bits); // :uint\n    // if size > 31, handle error\n    workingBitsAvailable -= bits;\n    if (workingBitsAvailable > 0) {\n      workingWord <<= bits;\n    } else if (workingBytesAvailable > 0) {\n      this.loadWord();\n    }\n\n    bits = size - bits;\n    if (bits > 0) {\n      return valu << bits | this.readBits(bits);\n    }\n    return valu;\n  };\n\n  // ():uint\n  this.skipLeadingZeros = function() {\n    var leadingZeroCount; // :uint\n    for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n      if ((workingWord & (0x80000000 >>> leadingZeroCount)) !== 0) {\n        // the first bit of working word is 1\n        workingWord <<= leadingZeroCount;\n        workingBitsAvailable -= leadingZeroCount;\n        return leadingZeroCount;\n      }\n    }\n\n    // we exhausted workingWord and still have not found a 1\n    this.loadWord();\n    return leadingZeroCount + this.skipLeadingZeros();\n  };\n\n  // ():void\n  this.skipUnsignedExpGolomb = function() {\n    this.skipBits(1 + this.skipLeadingZeros());\n  };\n\n  // ():void\n  this.skipExpGolomb = function() {\n    this.skipBits(1 + this.skipLeadingZeros());\n  };\n\n  // ():uint\n  this.readUnsignedExpGolomb = function() {\n    var clz = this.skipLeadingZeros(); // :uint\n    return this.readBits(clz + 1) - 1;\n  };\n\n  // ():int\n  this.readExpGolomb = function() {\n    var valu = this.readUnsignedExpGolomb(); // :int\n    if (0x01 & valu) {\n      // the number is odd if the low order bit is set\n      return (1 + valu) >>> 1; // add 1 to make it even, and divide by 2\n    }\n    return -1 * (valu >>> 1); // divide by two then make it negative\n  };\n\n  // Some convenience functions\n  // :Boolean\n  this.readBoolean = function() {\n    return this.readBits(1) === 1;\n  };\n\n  // ():int\n  this.readUnsignedByte = function() {\n    return this.readBits(8);\n  };\n\n  this.loadWord();\n};\n\nmodule.exports = ExpGolomb;\n","var global = require('../internals/global');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar macrotask = require('../internals/task').set;\nvar IS_IOS = require('../internals/engine-is-ios');\nvar IS_WEBOS_WEBKIT = require('../internals/engine-is-webos-webkit');\nvar IS_NODE = require('../internals/engine-is-node');\n\nvar MutationObserver = global.MutationObserver || global.WebKitMutationObserver;\nvar document = global.document;\nvar process = global.process;\nvar Promise = global.Promise;\n// Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`\nvar queueMicrotaskDescriptor = getOwnPropertyDescriptor(global, 'queueMicrotask');\nvar queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;\n\nvar flush, head, last, notify, toggle, node, promise, then;\n\n// modern engines have queueMicrotask method\nif (!queueMicrotask) {\n  flush = function () {\n    var parent, fn;\n    if (IS_NODE && (parent = process.domain)) parent.exit();\n    while (head) {\n      fn = head.fn;\n      head = head.next;\n      try {\n        fn();\n      } catch (error) {\n        if (head) notify();\n        else last = undefined;\n        throw error;\n      }\n    } last = undefined;\n    if (parent) parent.enter();\n  };\n\n  // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339\n  // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898\n  if (!IS_IOS && !IS_NODE && !IS_WEBOS_WEBKIT && MutationObserver && document) {\n    toggle = true;\n    node = document.createTextNode('');\n    new MutationObserver(flush).observe(node, { characterData: true });\n    notify = function () {\n      node.data = toggle = !toggle;\n    };\n  // environments with maybe non-completely correct, but existent Promise\n  } else if (Promise && Promise.resolve) {\n    // Promise.resolve without an argument throws an error in LG WebOS 2\n    promise = Promise.resolve(undefined);\n    then = promise.then;\n    notify = function () {\n      then.call(promise, flush);\n    };\n  // Node.js without promises\n  } else if (IS_NODE) {\n    notify = function () {\n      process.nextTick(flush);\n    };\n  // for other environments - macrotask based on:\n  // - setImmediate\n  // - MessageChannel\n  // - window.postMessag\n  // - onreadystatechange\n  // - setTimeout\n  } else {\n    notify = function () {\n      // strange IE + webpack dev server bug - use .call(global)\n      macrotask.call(global, flush);\n    };\n  }\n}\n\nmodule.exports = queueMicrotask || function (fn) {\n  var task = { fn: fn, next: undefined };\n  if (last) last.next = task;\n  if (!head) {\n    head = task;\n    notify();\n  } last = task;\n};\n","'use strict'\nvar Buffer = require('buffer').Buffer\nvar inherits = require('inherits')\nvar HashBase = require('hash-base')\n\nvar ARRAY16 = new Array(16)\n\nvar zl = [\n  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,\n  7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,\n  3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,\n  1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,\n  4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13\n]\n\nvar zr = [\n  5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,\n  6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,\n  15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,\n  8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,\n  12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11\n]\n\nvar sl = [\n  11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,\n  7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,\n  11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,\n  11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,\n  9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6\n]\n\nvar sr = [\n  8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,\n  9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,\n  9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,\n  15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,\n  8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11\n]\n\nvar hl = [0x00000000, 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e]\nvar hr = [0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9, 0x00000000]\n\nfunction RIPEMD160 () {\n  HashBase.call(this, 64)\n\n  // state\n  this._a = 0x67452301\n  this._b = 0xefcdab89\n  this._c = 0x98badcfe\n  this._d = 0x10325476\n  this._e = 0xc3d2e1f0\n}\n\ninherits(RIPEMD160, HashBase)\n\nRIPEMD160.prototype._update = function () {\n  var words = ARRAY16\n  for (var j = 0; j < 16; ++j) words[j] = this._block.readInt32LE(j * 4)\n\n  var al = this._a | 0\n  var bl = this._b | 0\n  var cl = this._c | 0\n  var dl = this._d | 0\n  var el = this._e | 0\n\n  var ar = this._a | 0\n  var br = this._b | 0\n  var cr = this._c | 0\n  var dr = this._d | 0\n  var er = this._e | 0\n\n  // computation\n  for (var i = 0; i < 80; i += 1) {\n    var tl\n    var tr\n    if (i < 16) {\n      tl = fn1(al, bl, cl, dl, el, words[zl[i]], hl[0], sl[i])\n      tr = fn5(ar, br, cr, dr, er, words[zr[i]], hr[0], sr[i])\n    } else if (i < 32) {\n      tl = fn2(al, bl, cl, dl, el, words[zl[i]], hl[1], sl[i])\n      tr = fn4(ar, br, cr, dr, er, words[zr[i]], hr[1], sr[i])\n    } else if (i < 48) {\n      tl = fn3(al, bl, cl, dl, el, words[zl[i]], hl[2], sl[i])\n      tr = fn3(ar, br, cr, dr, er, words[zr[i]], hr[2], sr[i])\n    } else if (i < 64) {\n      tl = fn4(al, bl, cl, dl, el, words[zl[i]], hl[3], sl[i])\n      tr = fn2(ar, br, cr, dr, er, words[zr[i]], hr[3], sr[i])\n    } else { // if (i<80) {\n      tl = fn5(al, bl, cl, dl, el, words[zl[i]], hl[4], sl[i])\n      tr = fn1(ar, br, cr, dr, er, words[zr[i]], hr[4], sr[i])\n    }\n\n    al = el\n    el = dl\n    dl = rotl(cl, 10)\n    cl = bl\n    bl = tl\n\n    ar = er\n    er = dr\n    dr = rotl(cr, 10)\n    cr = br\n    br = tr\n  }\n\n  // update state\n  var t = (this._b + cl + dr) | 0\n  this._b = (this._c + dl + er) | 0\n  this._c = (this._d + el + ar) | 0\n  this._d = (this._e + al + br) | 0\n  this._e = (this._a + bl + cr) | 0\n  this._a = t\n}\n\nRIPEMD160.prototype._digest = function () {\n  // create padding and handle blocks\n  this._block[this._blockOffset++] = 0x80\n  if (this._blockOffset > 56) {\n    this._block.fill(0, this._blockOffset, 64)\n    this._update()\n    this._blockOffset = 0\n  }\n\n  this._block.fill(0, this._blockOffset, 56)\n  this._block.writeUInt32LE(this._length[0], 56)\n  this._block.writeUInt32LE(this._length[1], 60)\n  this._update()\n\n  // produce result\n  var buffer = Buffer.alloc ? Buffer.alloc(20) : new Buffer(20)\n  buffer.writeInt32LE(this._a, 0)\n  buffer.writeInt32LE(this._b, 4)\n  buffer.writeInt32LE(this._c, 8)\n  buffer.writeInt32LE(this._d, 12)\n  buffer.writeInt32LE(this._e, 16)\n  return buffer\n}\n\nfunction rotl (x, n) {\n  return (x << n) | (x >>> (32 - n))\n}\n\nfunction fn1 (a, b, c, d, e, m, k, s) {\n  return (rotl((a + (b ^ c ^ d) + m + k) | 0, s) + e) | 0\n}\n\nfunction fn2 (a, b, c, d, e, m, k, s) {\n  return (rotl((a + ((b & c) | ((~b) & d)) + m + k) | 0, s) + e) | 0\n}\n\nfunction fn3 (a, b, c, d, e, m, k, s) {\n  return (rotl((a + ((b | (~c)) ^ d) + m + k) | 0, s) + e) | 0\n}\n\nfunction fn4 (a, b, c, d, e, m, k, s) {\n  return (rotl((a + ((b & d) | (c & (~d))) + m + k) | 0, s) + e) | 0\n}\n\nfunction fn5 (a, b, c, d, e, m, k, s) {\n  return (rotl((a + (b ^ (c | (~d))) + m + k) | 0, s) + e) | 0\n}\n\nmodule.exports = RIPEMD160\n","import getWindow from \"./getWindow.js\";\nimport getDocumentElement from \"./getDocumentElement.js\";\nimport getWindowScrollBarX from \"./getWindowScrollBarX.js\";\nexport default function getViewportRect(element) {\n  var win = getWindow(element);\n  var html = getDocumentElement(element);\n  var visualViewport = win.visualViewport;\n  var width = html.clientWidth;\n  var height = html.clientHeight;\n  var x = 0;\n  var y = 0; // NB: This isn't supported on iOS <= 12. If the keyboard is open, the popper\n  // can be obscured underneath it.\n  // Also, `html.clientHeight` adds the bottom bar height in Safari iOS, even\n  // if it isn't open, so if this isn't available, the popper will be detected\n  // to overflow the bottom of the screen too early.\n\n  if (visualViewport) {\n    width = visualViewport.width;\n    height = visualViewport.height; // Uses Layout Viewport (like Chrome; Safari does not currently)\n    // In Chrome, it returns a value very close to 0 (+/-) but contains rounding\n    // errors due to floating point numbers, so we need to check precision.\n    // Safari returns a number <= 0, usually < -1 when pinch-zoomed\n    // Feature detection fails in mobile emulation mode in Chrome.\n    // Math.abs(win.innerWidth / visualViewport.scale - visualViewport.width) <\n    // 0.001\n    // Fallback here: \"Not Safari\" userAgent\n\n    if (!/^((?!chrome|android).)*safari/i.test(navigator.userAgent)) {\n      x = visualViewport.offsetLeft;\n      y = visualViewport.offsetTop;\n    }\n  }\n\n  return {\n    width: width,\n    height: height,\n    x: x + getWindowScrollBarX(element),\n    y: y\n  };\n}","import getDocumentElement from \"./getDocumentElement.js\";\nimport getComputedStyle from \"./getComputedStyle.js\";\nimport getWindowScrollBarX from \"./getWindowScrollBarX.js\";\nimport getWindowScroll from \"./getWindowScroll.js\";\nimport { max } from \"../utils/math.js\"; // Gets the entire size of the scrollable document area, even extending outside\n// of the `<html>` and `<body>` rect bounds if horizontally scrollable\n\nexport default function getDocumentRect(element) {\n  var _element$ownerDocumen;\n\n  var html = getDocumentElement(element);\n  var winScroll = getWindowScroll(element);\n  var body = (_element$ownerDocumen = element.ownerDocument) == null ? void 0 : _element$ownerDocumen.body;\n  var width = max(html.scrollWidth, html.clientWidth, body ? body.scrollWidth : 0, body ? body.clientWidth : 0);\n  var height = max(html.scrollHeight, html.clientHeight, body ? body.scrollHeight : 0, body ? body.clientHeight : 0);\n  var x = -winScroll.scrollLeft + getWindowScrollBarX(element);\n  var y = -winScroll.scrollTop;\n\n  if (getComputedStyle(body || html).direction === 'rtl') {\n    x += max(html.clientWidth, body ? body.clientWidth : 0) - width;\n  }\n\n  return {\n    width: width,\n    height: height,\n    x: x,\n    y: y\n  };\n}","export default function rectToClientRect(rect) {\n  return Object.assign({}, rect, {\n    left: rect.x,\n    top: rect.y,\n    right: rect.x + rect.width,\n    bottom: rect.y + rect.height\n  });\n}","import { viewport } from \"../enums.js\";\nimport getViewportRect from \"./getViewportRect.js\";\nimport getDocumentRect from \"./getDocumentRect.js\";\nimport listScrollParents from \"./listScrollParents.js\";\nimport getOffsetParent from \"./getOffsetParent.js\";\nimport getDocumentElement from \"./getDocumentElement.js\";\nimport getComputedStyle from \"./getComputedStyle.js\";\nimport { isElement, isHTMLElement } from \"./instanceOf.js\";\nimport getBoundingClientRect from \"./getBoundingClientRect.js\";\nimport getParentNode from \"./getParentNode.js\";\nimport contains from \"./contains.js\";\nimport getNodeName from \"./getNodeName.js\";\nimport rectToClientRect from \"../utils/rectToClientRect.js\";\nimport { max, min } from \"../utils/math.js\";\n\nfunction getInnerBoundingClientRect(element) {\n  var rect = getBoundingClientRect(element);\n  rect.top = rect.top + element.clientTop;\n  rect.left = rect.left + element.clientLeft;\n  rect.bottom = rect.top + element.clientHeight;\n  rect.right = rect.left + element.clientWidth;\n  rect.width = element.clientWidth;\n  rect.height = element.clientHeight;\n  rect.x = rect.left;\n  rect.y = rect.top;\n  return rect;\n}\n\nfunction getClientRectFromMixedType(element, clippingParent) {\n  return clippingParent === viewport ? rectToClientRect(getViewportRect(element)) : isElement(clippingParent) ? getInnerBoundingClientRect(clippingParent) : rectToClientRect(getDocumentRect(getDocumentElement(element)));\n} // A \"clipping parent\" is an overflowable container with the characteristic of\n// clipping (or hiding) overflowing elements with a position different from\n// `initial`\n\n\nfunction getClippingParents(element) {\n  var clippingParents = listScrollParents(getParentNode(element));\n  var canEscapeClipping = ['absolute', 'fixed'].indexOf(getComputedStyle(element).position) >= 0;\n  var clipperElement = canEscapeClipping && isHTMLElement(element) ? getOffsetParent(element) : element;\n\n  if (!isElement(clipperElement)) {\n    return [];\n  } // $FlowFixMe[incompatible-return]: https://github.com/facebook/flow/issues/1414\n\n\n  return clippingParents.filter(function (clippingParent) {\n    return isElement(clippingParent) && contains(clippingParent, clipperElement) && getNodeName(clippingParent) !== 'body';\n  });\n} // Gets the maximum area that the element is visible in due to any number of\n// clipping parents\n\n\nexport default function getClippingRect(element, boundary, rootBoundary) {\n  var mainClippingParents = boundary === 'clippingParents' ? getClippingParents(element) : [].concat(boundary);\n  var clippingParents = [].concat(mainClippingParents, [rootBoundary]);\n  var firstClippingParent = clippingParents[0];\n  var clippingRect = clippingParents.reduce(function (accRect, clippingParent) {\n    var rect = getClientRectFromMixedType(element, clippingParent);\n    accRect.top = max(rect.top, accRect.top);\n    accRect.right = min(rect.right, accRect.right);\n    accRect.bottom = min(rect.bottom, accRect.bottom);\n    accRect.left = max(rect.left, accRect.left);\n    return accRect;\n  }, getClientRectFromMixedType(element, firstClippingParent));\n  clippingRect.width = clippingRect.right - clippingRect.left;\n  clippingRect.height = clippingRect.bottom - clippingRect.top;\n  clippingRect.x = clippingRect.left;\n  clippingRect.y = clippingRect.top;\n  return clippingRect;\n}","import getClippingRect from \"../dom-utils/getClippingRect.js\";\nimport getDocumentElement from \"../dom-utils/getDocumentElement.js\";\nimport getBoundingClientRect from \"../dom-utils/getBoundingClientRect.js\";\nimport computeOffsets from \"./computeOffsets.js\";\nimport rectToClientRect from \"./rectToClientRect.js\";\nimport { clippingParents, reference, popper, bottom, top, right, basePlacements, viewport } from \"../enums.js\";\nimport { isElement } from \"../dom-utils/instanceOf.js\";\nimport mergePaddingObject from \"./mergePaddingObject.js\";\nimport expandToHashMap from \"./expandToHashMap.js\"; // eslint-disable-next-line import/no-unused-modules\n\nexport default function detectOverflow(state, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      _options$placement = _options.placement,\n      placement = _options$placement === void 0 ? state.placement : _options$placement,\n      _options$boundary = _options.boundary,\n      boundary = _options$boundary === void 0 ? clippingParents : _options$boundary,\n      _options$rootBoundary = _options.rootBoundary,\n      rootBoundary = _options$rootBoundary === void 0 ? viewport : _options$rootBoundary,\n      _options$elementConte = _options.elementContext,\n      elementContext = _options$elementConte === void 0 ? popper : _options$elementConte,\n      _options$altBoundary = _options.altBoundary,\n      altBoundary = _options$altBoundary === void 0 ? false : _options$altBoundary,\n      _options$padding = _options.padding,\n      padding = _options$padding === void 0 ? 0 : _options$padding;\n  var paddingObject = mergePaddingObject(typeof padding !== 'number' ? padding : expandToHashMap(padding, basePlacements));\n  var altContext = elementContext === popper ? reference : popper;\n  var popperRect = state.rects.popper;\n  var element = state.elements[altBoundary ? altContext : elementContext];\n  var clippingClientRect = getClippingRect(isElement(element) ? element : element.contextElement || getDocumentElement(state.elements.popper), boundary, rootBoundary);\n  var referenceClientRect = getBoundingClientRect(state.elements.reference);\n  var popperOffsets = computeOffsets({\n    reference: referenceClientRect,\n    element: popperRect,\n    strategy: 'absolute',\n    placement: placement\n  });\n  var popperClientRect = rectToClientRect(Object.assign({}, popperRect, popperOffsets));\n  var elementClientRect = elementContext === popper ? popperClientRect : referenceClientRect; // positive = overflowing the clipping rect\n  // 0 or negative = within the clipping rect\n\n  var overflowOffsets = {\n    top: clippingClientRect.top - elementClientRect.top + paddingObject.top,\n    bottom: elementClientRect.bottom - clippingClientRect.bottom + paddingObject.bottom,\n    left: clippingClientRect.left - elementClientRect.left + paddingObject.left,\n    right: elementClientRect.right - clippingClientRect.right + paddingObject.right\n  };\n  var offsetData = state.modifiersData.offset; // Offsets can be applied only to the popper element\n\n  if (elementContext === popper && offsetData) {\n    var offset = offsetData[placement];\n    Object.keys(overflowOffsets).forEach(function (key) {\n      var multiply = [right, bottom].indexOf(key) >= 0 ? 1 : -1;\n      var axis = [top, bottom].indexOf(key) >= 0 ? 'y' : 'x';\n      overflowOffsets[key] += offset[axis] * multiply;\n    });\n  }\n\n  return overflowOffsets;\n}","var global = require('../internals/global');\nvar shared = require('../internals/shared');\nvar has = require('../internals/has');\nvar uid = require('../internals/uid');\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\nvar USE_SYMBOL_AS_UID = require('../internals/use-symbol-as-uid');\n\nvar WellKnownSymbolsStore = shared('wks');\nvar Symbol = global.Symbol;\nvar createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol : Symbol && Symbol.withoutSetter || uid;\n\nmodule.exports = function (name) {\n  if (!has(WellKnownSymbolsStore, name) || !(NATIVE_SYMBOL || typeof WellKnownSymbolsStore[name] == 'string')) {\n    if (NATIVE_SYMBOL && has(Symbol, name)) {\n      WellKnownSymbolsStore[name] = Symbol[name];\n    } else {\n      WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);\n    }\n  } return WellKnownSymbolsStore[name];\n};\n","import getNodeName from \"./getNodeName.js\";\nexport default function isTableElement(element) {\n  return ['table', 'td', 'th'].indexOf(getNodeName(element)) >= 0;\n}","import getWindow from \"./getWindow.js\";\nimport getNodeName from \"./getNodeName.js\";\nimport getComputedStyle from \"./getComputedStyle.js\";\nimport { isHTMLElement, isShadowRoot } from \"./instanceOf.js\";\nimport isTableElement from \"./isTableElement.js\";\nimport getParentNode from \"./getParentNode.js\";\n\nfunction getTrueOffsetParent(element) {\n  if (!isHTMLElement(element) || // https://github.com/popperjs/popper-core/issues/837\n  getComputedStyle(element).position === 'fixed') {\n    return null;\n  }\n\n  return element.offsetParent;\n} // `.offsetParent` reports `null` for fixed elements, while absolute elements\n// return the containing block\n\n\nfunction getContainingBlock(element) {\n  var isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') !== -1;\n  var isIE = navigator.userAgent.indexOf('Trident') !== -1;\n\n  if (isIE && isHTMLElement(element)) {\n    // In IE 9, 10 and 11 fixed elements containing block is always established by the viewport\n    var elementCss = getComputedStyle(element);\n\n    if (elementCss.position === 'fixed') {\n      return null;\n    }\n  }\n\n  var currentNode = getParentNode(element);\n\n  if (isShadowRoot(currentNode)) {\n    currentNode = currentNode.host;\n  }\n\n  while (isHTMLElement(currentNode) && ['html', 'body'].indexOf(getNodeName(currentNode)) < 0) {\n    var css = getComputedStyle(currentNode); // This is non-exhaustive but covers the most common CSS properties that\n    // create a containing block.\n    // https://developer.mozilla.org/en-US/docs/Web/CSS/Containing_block#identifying_the_containing_block\n\n    if (css.transform !== 'none' || css.perspective !== 'none' || css.contain === 'paint' || ['transform', 'perspective'].indexOf(css.willChange) !== -1 || isFirefox && css.willChange === 'filter' || isFirefox && css.filter && css.filter !== 'none') {\n      return currentNode;\n    } else {\n      currentNode = currentNode.parentNode;\n    }\n  }\n\n  return null;\n} // Gets the closest ancestor positioned element. Handles some edge cases,\n// such as table ancestors and cross browser bugs.\n\n\nexport default function getOffsetParent(element) {\n  var window = getWindow(element);\n  var offsetParent = getTrueOffsetParent(element);\n\n  while (offsetParent && isTableElement(offsetParent) && getComputedStyle(offsetParent).position === 'static') {\n    offsetParent = getTrueOffsetParent(offsetParent);\n  }\n\n  if (offsetParent && (getNodeName(offsetParent) === 'html' || getNodeName(offsetParent) === 'body' && getComputedStyle(offsetParent).position === 'static')) {\n    return window;\n  }\n\n  return offsetParent || getContainingBlock(element) || window;\n}","/*!\n * The buffer module from node.js, for the browser.\n *\n * @author   Feross Aboukhadijeh <http://feross.org>\n * @license  MIT\n */\n/* eslint-disable no-proto */\n\n'use strict'\n\nvar base64 = require('base64-js')\nvar ieee754 = require('ieee754')\nvar isArray = require('isarray')\n\nexports.Buffer = Buffer\nexports.SlowBuffer = SlowBuffer\nexports.INSPECT_MAX_BYTES = 50\n\n/**\n * If `Buffer.TYPED_ARRAY_SUPPORT`:\n *   === true    Use Uint8Array implementation (fastest)\n *   === false   Use Object implementation (most compatible, even IE6)\n *\n * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,\n * Opera 11.6+, iOS 4.2+.\n *\n * Due to various browser bugs, sometimes the Object implementation will be used even\n * when the browser supports typed arrays.\n *\n * Note:\n *\n *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,\n *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.\n *\n *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.\n *\n *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of\n *     incorrect length in some situations.\n\n * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they\n * get the Object implementation, which is slower but behaves correctly.\n */\nBuffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined\n  ? global.TYPED_ARRAY_SUPPORT\n  : typedArraySupport()\n\n/*\n * Export kMaxLength after typed array support is determined.\n */\nexports.kMaxLength = kMaxLength()\n\nfunction typedArraySupport () {\n  try {\n    var arr = new Uint8Array(1)\n    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}\n    return arr.foo() === 42 && // typed array instances can be augmented\n        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`\n        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`\n  } catch (e) {\n    return false\n  }\n}\n\nfunction kMaxLength () {\n  return Buffer.TYPED_ARRAY_SUPPORT\n    ? 0x7fffffff\n    : 0x3fffffff\n}\n\nfunction createBuffer (that, length) {\n  if (kMaxLength() < length) {\n    throw new RangeError('Invalid typed array length')\n  }\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = new Uint8Array(length)\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    if (that === null) {\n      that = new Buffer(length)\n    }\n    that.length = length\n  }\n\n  return that\n}\n\n/**\n * The Buffer constructor returns instances of `Uint8Array` that have their\n * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of\n * `Uint8Array`, so the returned instances will have all the node `Buffer` methods\n * and the `Uint8Array` methods. Square bracket notation works as expected -- it\n * returns a single octet.\n *\n * The `Uint8Array` prototype remains unmodified.\n */\n\nfunction Buffer (arg, encodingOrOffset, length) {\n  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {\n    return new Buffer(arg, encodingOrOffset, length)\n  }\n\n  // Common case.\n  if (typeof arg === 'number') {\n    if (typeof encodingOrOffset === 'string') {\n      throw new Error(\n        'If encoding is specified then the first argument must be a string'\n      )\n    }\n    return allocUnsafe(this, arg)\n  }\n  return from(this, arg, encodingOrOffset, length)\n}\n\nBuffer.poolSize = 8192 // not used by this implementation\n\n// TODO: Legacy, not needed anymore. Remove in next major version.\nBuffer._augment = function (arr) {\n  arr.__proto__ = Buffer.prototype\n  return arr\n}\n\nfunction from (that, value, encodingOrOffset, length) {\n  if (typeof value === 'number') {\n    throw new TypeError('\"value\" argument must not be a number')\n  }\n\n  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {\n    return fromArrayBuffer(that, value, encodingOrOffset, length)\n  }\n\n  if (typeof value === 'string') {\n    return fromString(that, value, encodingOrOffset)\n  }\n\n  return fromObject(that, value)\n}\n\n/**\n * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError\n * if value is a number.\n * Buffer.from(str[, encoding])\n * Buffer.from(array)\n * Buffer.from(buffer)\n * Buffer.from(arrayBuffer[, byteOffset[, length]])\n **/\nBuffer.from = function (value, encodingOrOffset, length) {\n  return from(null, value, encodingOrOffset, length)\n}\n\nif (Buffer.TYPED_ARRAY_SUPPORT) {\n  Buffer.prototype.__proto__ = Uint8Array.prototype\n  Buffer.__proto__ = Uint8Array\n  if (typeof Symbol !== 'undefined' && Symbol.species &&\n      Buffer[Symbol.species] === Buffer) {\n    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97\n    Object.defineProperty(Buffer, Symbol.species, {\n      value: null,\n      configurable: true\n    })\n  }\n}\n\nfunction assertSize (size) {\n  if (typeof size !== 'number') {\n    throw new TypeError('\"size\" argument must be a number')\n  } else if (size < 0) {\n    throw new RangeError('\"size\" argument must not be negative')\n  }\n}\n\nfunction alloc (that, size, fill, encoding) {\n  assertSize(size)\n  if (size <= 0) {\n    return createBuffer(that, size)\n  }\n  if (fill !== undefined) {\n    // Only pay attention to encoding if it's a string. This\n    // prevents accidentally sending in a number that would\n    // be interpretted as a start offset.\n    return typeof encoding === 'string'\n      ? createBuffer(that, size).fill(fill, encoding)\n      : createBuffer(that, size).fill(fill)\n  }\n  return createBuffer(that, size)\n}\n\n/**\n * Creates a new filled Buffer instance.\n * alloc(size[, fill[, encoding]])\n **/\nBuffer.alloc = function (size, fill, encoding) {\n  return alloc(null, size, fill, encoding)\n}\n\nfunction allocUnsafe (that, size) {\n  assertSize(size)\n  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) {\n    for (var i = 0; i < size; ++i) {\n      that[i] = 0\n    }\n  }\n  return that\n}\n\n/**\n * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.\n * */\nBuffer.allocUnsafe = function (size) {\n  return allocUnsafe(null, size)\n}\n/**\n * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.\n */\nBuffer.allocUnsafeSlow = function (size) {\n  return allocUnsafe(null, size)\n}\n\nfunction fromString (that, string, encoding) {\n  if (typeof encoding !== 'string' || encoding === '') {\n    encoding = 'utf8'\n  }\n\n  if (!Buffer.isEncoding(encoding)) {\n    throw new TypeError('\"encoding\" must be a valid string encoding')\n  }\n\n  var length = byteLength(string, encoding) | 0\n  that = createBuffer(that, length)\n\n  var actual = that.write(string, encoding)\n\n  if (actual !== length) {\n    // Writing a hex string, for example, that contains invalid characters will\n    // cause everything after the first invalid character to be ignored. (e.g.\n    // 'abxxcd' will be treated as 'ab')\n    that = that.slice(0, actual)\n  }\n\n  return that\n}\n\nfunction fromArrayLike (that, array) {\n  var length = array.length < 0 ? 0 : checked(array.length) | 0\n  that = createBuffer(that, length)\n  for (var i = 0; i < length; i += 1) {\n    that[i] = array[i] & 255\n  }\n  return that\n}\n\nfunction fromArrayBuffer (that, array, byteOffset, length) {\n  array.byteLength // this throws if `array` is not a valid ArrayBuffer\n\n  if (byteOffset < 0 || array.byteLength < byteOffset) {\n    throw new RangeError('\\'offset\\' is out of bounds')\n  }\n\n  if (array.byteLength < byteOffset + (length || 0)) {\n    throw new RangeError('\\'length\\' is out of bounds')\n  }\n\n  if (byteOffset === undefined && length === undefined) {\n    array = new Uint8Array(array)\n  } else if (length === undefined) {\n    array = new Uint8Array(array, byteOffset)\n  } else {\n    array = new Uint8Array(array, byteOffset, length)\n  }\n\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    // Return an augmented `Uint8Array` instance, for best performance\n    that = array\n    that.__proto__ = Buffer.prototype\n  } else {\n    // Fallback: Return an object instance of the Buffer class\n    that = fromArrayLike(that, array)\n  }\n  return that\n}\n\nfunction fromObject (that, obj) {\n  if (Buffer.isBuffer(obj)) {\n    var len = checked(obj.length) | 0\n    that = createBuffer(that, len)\n\n    if (that.length === 0) {\n      return that\n    }\n\n    obj.copy(that, 0, 0, len)\n    return that\n  }\n\n  if (obj) {\n    if ((typeof ArrayBuffer !== 'undefined' &&\n        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {\n      if (typeof obj.length !== 'number' || isnan(obj.length)) {\n        return createBuffer(that, 0)\n      }\n      return fromArrayLike(that, obj)\n    }\n\n    if (obj.type === 'Buffer' && isArray(obj.data)) {\n      return fromArrayLike(that, obj.data)\n    }\n  }\n\n  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')\n}\n\nfunction checked (length) {\n  // Note: cannot use `length < kMaxLength()` here because that fails when\n  // length is NaN (which is otherwise coerced to zero.)\n  if (length >= kMaxLength()) {\n    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +\n                         'size: 0x' + kMaxLength().toString(16) + ' bytes')\n  }\n  return length | 0\n}\n\nfunction SlowBuffer (length) {\n  if (+length != length) { // eslint-disable-line eqeqeq\n    length = 0\n  }\n  return Buffer.alloc(+length)\n}\n\nBuffer.isBuffer = function isBuffer (b) {\n  return !!(b != null && b._isBuffer)\n}\n\nBuffer.compare = function compare (a, b) {\n  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {\n    throw new TypeError('Arguments must be Buffers')\n  }\n\n  if (a === b) return 0\n\n  var x = a.length\n  var y = b.length\n\n  for (var i = 0, len = Math.min(x, y); i < len; ++i) {\n    if (a[i] !== b[i]) {\n      x = a[i]\n      y = b[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\nBuffer.isEncoding = function isEncoding (encoding) {\n  switch (String(encoding).toLowerCase()) {\n    case 'hex':\n    case 'utf8':\n    case 'utf-8':\n    case 'ascii':\n    case 'latin1':\n    case 'binary':\n    case 'base64':\n    case 'ucs2':\n    case 'ucs-2':\n    case 'utf16le':\n    case 'utf-16le':\n      return true\n    default:\n      return false\n  }\n}\n\nBuffer.concat = function concat (list, length) {\n  if (!isArray(list)) {\n    throw new TypeError('\"list\" argument must be an Array of Buffers')\n  }\n\n  if (list.length === 0) {\n    return Buffer.alloc(0)\n  }\n\n  var i\n  if (length === undefined) {\n    length = 0\n    for (i = 0; i < list.length; ++i) {\n      length += list[i].length\n    }\n  }\n\n  var buffer = Buffer.allocUnsafe(length)\n  var pos = 0\n  for (i = 0; i < list.length; ++i) {\n    var buf = list[i]\n    if (!Buffer.isBuffer(buf)) {\n      throw new TypeError('\"list\" argument must be an Array of Buffers')\n    }\n    buf.copy(buffer, pos)\n    pos += buf.length\n  }\n  return buffer\n}\n\nfunction byteLength (string, encoding) {\n  if (Buffer.isBuffer(string)) {\n    return string.length\n  }\n  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&\n      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {\n    return string.byteLength\n  }\n  if (typeof string !== 'string') {\n    string = '' + string\n  }\n\n  var len = string.length\n  if (len === 0) return 0\n\n  // Use a for loop to avoid recursion\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'ascii':\n      case 'latin1':\n      case 'binary':\n        return len\n      case 'utf8':\n      case 'utf-8':\n      case undefined:\n        return utf8ToBytes(string).length\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return len * 2\n      case 'hex':\n        return len >>> 1\n      case 'base64':\n        return base64ToBytes(string).length\n      default:\n        if (loweredCase) return utf8ToBytes(string).length // assume utf8\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\nBuffer.byteLength = byteLength\n\nfunction slowToString (encoding, start, end) {\n  var loweredCase = false\n\n  // No need to verify that \"this.length <= MAX_UINT32\" since it's a read-only\n  // property of a typed array.\n\n  // This behaves neither like String nor Uint8Array in that we set start/end\n  // to their upper/lower bounds if the value passed is out of range.\n  // undefined is handled specially as per ECMA-262 6th Edition,\n  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.\n  if (start === undefined || start < 0) {\n    start = 0\n  }\n  // Return early if start > this.length. Done here to prevent potential uint32\n  // coercion fail below.\n  if (start > this.length) {\n    return ''\n  }\n\n  if (end === undefined || end > this.length) {\n    end = this.length\n  }\n\n  if (end <= 0) {\n    return ''\n  }\n\n  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.\n  end >>>= 0\n  start >>>= 0\n\n  if (end <= start) {\n    return ''\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  while (true) {\n    switch (encoding) {\n      case 'hex':\n        return hexSlice(this, start, end)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Slice(this, start, end)\n\n      case 'ascii':\n        return asciiSlice(this, start, end)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Slice(this, start, end)\n\n      case 'base64':\n        return base64Slice(this, start, end)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return utf16leSlice(this, start, end)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = (encoding + '').toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\n// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect\n// Buffer instances.\nBuffer.prototype._isBuffer = true\n\nfunction swap (b, n, m) {\n  var i = b[n]\n  b[n] = b[m]\n  b[m] = i\n}\n\nBuffer.prototype.swap16 = function swap16 () {\n  var len = this.length\n  if (len % 2 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 16-bits')\n  }\n  for (var i = 0; i < len; i += 2) {\n    swap(this, i, i + 1)\n  }\n  return this\n}\n\nBuffer.prototype.swap32 = function swap32 () {\n  var len = this.length\n  if (len % 4 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 32-bits')\n  }\n  for (var i = 0; i < len; i += 4) {\n    swap(this, i, i + 3)\n    swap(this, i + 1, i + 2)\n  }\n  return this\n}\n\nBuffer.prototype.swap64 = function swap64 () {\n  var len = this.length\n  if (len % 8 !== 0) {\n    throw new RangeError('Buffer size must be a multiple of 64-bits')\n  }\n  for (var i = 0; i < len; i += 8) {\n    swap(this, i, i + 7)\n    swap(this, i + 1, i + 6)\n    swap(this, i + 2, i + 5)\n    swap(this, i + 3, i + 4)\n  }\n  return this\n}\n\nBuffer.prototype.toString = function toString () {\n  var length = this.length | 0\n  if (length === 0) return ''\n  if (arguments.length === 0) return utf8Slice(this, 0, length)\n  return slowToString.apply(this, arguments)\n}\n\nBuffer.prototype.equals = function equals (b) {\n  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')\n  if (this === b) return true\n  return Buffer.compare(this, b) === 0\n}\n\nBuffer.prototype.inspect = function inspect () {\n  var str = ''\n  var max = exports.INSPECT_MAX_BYTES\n  if (this.length > 0) {\n    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')\n    if (this.length > max) str += ' ... '\n  }\n  return '<Buffer ' + str + '>'\n}\n\nBuffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {\n  if (!Buffer.isBuffer(target)) {\n    throw new TypeError('Argument must be a Buffer')\n  }\n\n  if (start === undefined) {\n    start = 0\n  }\n  if (end === undefined) {\n    end = target ? target.length : 0\n  }\n  if (thisStart === undefined) {\n    thisStart = 0\n  }\n  if (thisEnd === undefined) {\n    thisEnd = this.length\n  }\n\n  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {\n    throw new RangeError('out of range index')\n  }\n\n  if (thisStart >= thisEnd && start >= end) {\n    return 0\n  }\n  if (thisStart >= thisEnd) {\n    return -1\n  }\n  if (start >= end) {\n    return 1\n  }\n\n  start >>>= 0\n  end >>>= 0\n  thisStart >>>= 0\n  thisEnd >>>= 0\n\n  if (this === target) return 0\n\n  var x = thisEnd - thisStart\n  var y = end - start\n  var len = Math.min(x, y)\n\n  var thisCopy = this.slice(thisStart, thisEnd)\n  var targetCopy = target.slice(start, end)\n\n  for (var i = 0; i < len; ++i) {\n    if (thisCopy[i] !== targetCopy[i]) {\n      x = thisCopy[i]\n      y = targetCopy[i]\n      break\n    }\n  }\n\n  if (x < y) return -1\n  if (y < x) return 1\n  return 0\n}\n\n// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,\n// OR the last index of `val` in `buffer` at offset <= `byteOffset`.\n//\n// Arguments:\n// - buffer - a Buffer to search\n// - val - a string, Buffer, or number\n// - byteOffset - an index into `buffer`; will be clamped to an int32\n// - encoding - an optional encoding, relevant is val is a string\n// - dir - true for indexOf, false for lastIndexOf\nfunction bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {\n  // Empty buffer means no match\n  if (buffer.length === 0) return -1\n\n  // Normalize byteOffset\n  if (typeof byteOffset === 'string') {\n    encoding = byteOffset\n    byteOffset = 0\n  } else if (byteOffset > 0x7fffffff) {\n    byteOffset = 0x7fffffff\n  } else if (byteOffset < -0x80000000) {\n    byteOffset = -0x80000000\n  }\n  byteOffset = +byteOffset  // Coerce to Number.\n  if (isNaN(byteOffset)) {\n    // byteOffset: it it's undefined, null, NaN, \"foo\", etc, search whole buffer\n    byteOffset = dir ? 0 : (buffer.length - 1)\n  }\n\n  // Normalize byteOffset: negative offsets start from the end of the buffer\n  if (byteOffset < 0) byteOffset = buffer.length + byteOffset\n  if (byteOffset >= buffer.length) {\n    if (dir) return -1\n    else byteOffset = buffer.length - 1\n  } else if (byteOffset < 0) {\n    if (dir) byteOffset = 0\n    else return -1\n  }\n\n  // Normalize val\n  if (typeof val === 'string') {\n    val = Buffer.from(val, encoding)\n  }\n\n  // Finally, search either indexOf (if dir is true) or lastIndexOf\n  if (Buffer.isBuffer(val)) {\n    // Special case: looking for empty string/buffer always fails\n    if (val.length === 0) {\n      return -1\n    }\n    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)\n  } else if (typeof val === 'number') {\n    val = val & 0xFF // Search for a byte value [0-255]\n    if (Buffer.TYPED_ARRAY_SUPPORT &&\n        typeof Uint8Array.prototype.indexOf === 'function') {\n      if (dir) {\n        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)\n      } else {\n        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)\n      }\n    }\n    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)\n  }\n\n  throw new TypeError('val must be string, number or Buffer')\n}\n\nfunction arrayIndexOf (arr, val, byteOffset, encoding, dir) {\n  var indexSize = 1\n  var arrLength = arr.length\n  var valLength = val.length\n\n  if (encoding !== undefined) {\n    encoding = String(encoding).toLowerCase()\n    if (encoding === 'ucs2' || encoding === 'ucs-2' ||\n        encoding === 'utf16le' || encoding === 'utf-16le') {\n      if (arr.length < 2 || val.length < 2) {\n        return -1\n      }\n      indexSize = 2\n      arrLength /= 2\n      valLength /= 2\n      byteOffset /= 2\n    }\n  }\n\n  function read (buf, i) {\n    if (indexSize === 1) {\n      return buf[i]\n    } else {\n      return buf.readUInt16BE(i * indexSize)\n    }\n  }\n\n  var i\n  if (dir) {\n    var foundIndex = -1\n    for (i = byteOffset; i < arrLength; i++) {\n      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {\n        if (foundIndex === -1) foundIndex = i\n        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize\n      } else {\n        if (foundIndex !== -1) i -= i - foundIndex\n        foundIndex = -1\n      }\n    }\n  } else {\n    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength\n    for (i = byteOffset; i >= 0; i--) {\n      var found = true\n      for (var j = 0; j < valLength; j++) {\n        if (read(arr, i + j) !== read(val, j)) {\n          found = false\n          break\n        }\n      }\n      if (found) return i\n    }\n  }\n\n  return -1\n}\n\nBuffer.prototype.includes = function includes (val, byteOffset, encoding) {\n  return this.indexOf(val, byteOffset, encoding) !== -1\n}\n\nBuffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)\n}\n\nBuffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {\n  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)\n}\n\nfunction hexWrite (buf, string, offset, length) {\n  offset = Number(offset) || 0\n  var remaining = buf.length - offset\n  if (!length) {\n    length = remaining\n  } else {\n    length = Number(length)\n    if (length > remaining) {\n      length = remaining\n    }\n  }\n\n  // must be an even number of digits\n  var strLen = string.length\n  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')\n\n  if (length > strLen / 2) {\n    length = strLen / 2\n  }\n  for (var i = 0; i < length; ++i) {\n    var parsed = parseInt(string.substr(i * 2, 2), 16)\n    if (isNaN(parsed)) return i\n    buf[offset + i] = parsed\n  }\n  return i\n}\n\nfunction utf8Write (buf, string, offset, length) {\n  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nfunction asciiWrite (buf, string, offset, length) {\n  return blitBuffer(asciiToBytes(string), buf, offset, length)\n}\n\nfunction latin1Write (buf, string, offset, length) {\n  return asciiWrite(buf, string, offset, length)\n}\n\nfunction base64Write (buf, string, offset, length) {\n  return blitBuffer(base64ToBytes(string), buf, offset, length)\n}\n\nfunction ucs2Write (buf, string, offset, length) {\n  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)\n}\n\nBuffer.prototype.write = function write (string, offset, length, encoding) {\n  // Buffer#write(string)\n  if (offset === undefined) {\n    encoding = 'utf8'\n    length = this.length\n    offset = 0\n  // Buffer#write(string, encoding)\n  } else if (length === undefined && typeof offset === 'string') {\n    encoding = offset\n    length = this.length\n    offset = 0\n  // Buffer#write(string, offset[, length][, encoding])\n  } else if (isFinite(offset)) {\n    offset = offset | 0\n    if (isFinite(length)) {\n      length = length | 0\n      if (encoding === undefined) encoding = 'utf8'\n    } else {\n      encoding = length\n      length = undefined\n    }\n  // legacy write(string, encoding, offset, length) - remove in v0.13\n  } else {\n    throw new Error(\n      'Buffer.write(string, encoding, offset[, length]) is no longer supported'\n    )\n  }\n\n  var remaining = this.length - offset\n  if (length === undefined || length > remaining) length = remaining\n\n  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {\n    throw new RangeError('Attempt to write outside buffer bounds')\n  }\n\n  if (!encoding) encoding = 'utf8'\n\n  var loweredCase = false\n  for (;;) {\n    switch (encoding) {\n      case 'hex':\n        return hexWrite(this, string, offset, length)\n\n      case 'utf8':\n      case 'utf-8':\n        return utf8Write(this, string, offset, length)\n\n      case 'ascii':\n        return asciiWrite(this, string, offset, length)\n\n      case 'latin1':\n      case 'binary':\n        return latin1Write(this, string, offset, length)\n\n      case 'base64':\n        // Warning: maxLength not taken into account in base64Write\n        return base64Write(this, string, offset, length)\n\n      case 'ucs2':\n      case 'ucs-2':\n      case 'utf16le':\n      case 'utf-16le':\n        return ucs2Write(this, string, offset, length)\n\n      default:\n        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)\n        encoding = ('' + encoding).toLowerCase()\n        loweredCase = true\n    }\n  }\n}\n\nBuffer.prototype.toJSON = function toJSON () {\n  return {\n    type: 'Buffer',\n    data: Array.prototype.slice.call(this._arr || this, 0)\n  }\n}\n\nfunction base64Slice (buf, start, end) {\n  if (start === 0 && end === buf.length) {\n    return base64.fromByteArray(buf)\n  } else {\n    return base64.fromByteArray(buf.slice(start, end))\n  }\n}\n\nfunction utf8Slice (buf, start, end) {\n  end = Math.min(buf.length, end)\n  var res = []\n\n  var i = start\n  while (i < end) {\n    var firstByte = buf[i]\n    var codePoint = null\n    var bytesPerSequence = (firstByte > 0xEF) ? 4\n      : (firstByte > 0xDF) ? 3\n      : (firstByte > 0xBF) ? 2\n      : 1\n\n    if (i + bytesPerSequence <= end) {\n      var secondByte, thirdByte, fourthByte, tempCodePoint\n\n      switch (bytesPerSequence) {\n        case 1:\n          if (firstByte < 0x80) {\n            codePoint = firstByte\n          }\n          break\n        case 2:\n          secondByte = buf[i + 1]\n          if ((secondByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)\n            if (tempCodePoint > 0x7F) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 3:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)\n            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {\n              codePoint = tempCodePoint\n            }\n          }\n          break\n        case 4:\n          secondByte = buf[i + 1]\n          thirdByte = buf[i + 2]\n          fourthByte = buf[i + 3]\n          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {\n            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)\n            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {\n              codePoint = tempCodePoint\n            }\n          }\n      }\n    }\n\n    if (codePoint === null) {\n      // we did not generate a valid codePoint so insert a\n      // replacement char (U+FFFD) and advance only 1 byte\n      codePoint = 0xFFFD\n      bytesPerSequence = 1\n    } else if (codePoint > 0xFFFF) {\n      // encode to utf16 (surrogate pair dance)\n      codePoint -= 0x10000\n      res.push(codePoint >>> 10 & 0x3FF | 0xD800)\n      codePoint = 0xDC00 | codePoint & 0x3FF\n    }\n\n    res.push(codePoint)\n    i += bytesPerSequence\n  }\n\n  return decodeCodePointsArray(res)\n}\n\n// Based on http://stackoverflow.com/a/22747272/680742, the browser with\n// the lowest limit is Chrome, with 0x10000 args.\n// We go 1 magnitude less, for safety\nvar MAX_ARGUMENTS_LENGTH = 0x1000\n\nfunction decodeCodePointsArray (codePoints) {\n  var len = codePoints.length\n  if (len <= MAX_ARGUMENTS_LENGTH) {\n    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()\n  }\n\n  // Decode in chunks to avoid \"call stack size exceeded\".\n  var res = ''\n  var i = 0\n  while (i < len) {\n    res += String.fromCharCode.apply(\n      String,\n      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)\n    )\n  }\n  return res\n}\n\nfunction asciiSlice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i] & 0x7F)\n  }\n  return ret\n}\n\nfunction latin1Slice (buf, start, end) {\n  var ret = ''\n  end = Math.min(buf.length, end)\n\n  for (var i = start; i < end; ++i) {\n    ret += String.fromCharCode(buf[i])\n  }\n  return ret\n}\n\nfunction hexSlice (buf, start, end) {\n  var len = buf.length\n\n  if (!start || start < 0) start = 0\n  if (!end || end < 0 || end > len) end = len\n\n  var out = ''\n  for (var i = start; i < end; ++i) {\n    out += toHex(buf[i])\n  }\n  return out\n}\n\nfunction utf16leSlice (buf, start, end) {\n  var bytes = buf.slice(start, end)\n  var res = ''\n  for (var i = 0; i < bytes.length; i += 2) {\n    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)\n  }\n  return res\n}\n\nBuffer.prototype.slice = function slice (start, end) {\n  var len = this.length\n  start = ~~start\n  end = end === undefined ? len : ~~end\n\n  if (start < 0) {\n    start += len\n    if (start < 0) start = 0\n  } else if (start > len) {\n    start = len\n  }\n\n  if (end < 0) {\n    end += len\n    if (end < 0) end = 0\n  } else if (end > len) {\n    end = len\n  }\n\n  if (end < start) end = start\n\n  var newBuf\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    newBuf = this.subarray(start, end)\n    newBuf.__proto__ = Buffer.prototype\n  } else {\n    var sliceLen = end - start\n    newBuf = new Buffer(sliceLen, undefined)\n    for (var i = 0; i < sliceLen; ++i) {\n      newBuf[i] = this[i + start]\n    }\n  }\n\n  return newBuf\n}\n\n/*\n * Need to make sure that buffer isn't trying to write out of bounds.\n */\nfunction checkOffset (offset, ext, length) {\n  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')\n  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')\n}\n\nBuffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    checkOffset(offset, byteLength, this.length)\n  }\n\n  var val = this[offset + --byteLength]\n  var mul = 1\n  while (byteLength > 0 && (mul *= 0x100)) {\n    val += this[offset + --byteLength] * mul\n  }\n\n  return val\n}\n\nBuffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  return this[offset]\n}\n\nBuffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return this[offset] | (this[offset + 1] << 8)\n}\n\nBuffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  return (this[offset] << 8) | this[offset + 1]\n}\n\nBuffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return ((this[offset]) |\n      (this[offset + 1] << 8) |\n      (this[offset + 2] << 16)) +\n      (this[offset + 3] * 0x1000000)\n}\n\nBuffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] * 0x1000000) +\n    ((this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    this[offset + 3])\n}\n\nBuffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var val = this[offset]\n  var mul = 1\n  var i = 0\n  while (++i < byteLength && (mul *= 0x100)) {\n    val += this[offset + i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) checkOffset(offset, byteLength, this.length)\n\n  var i = byteLength\n  var mul = 1\n  var val = this[offset + --i]\n  while (i > 0 && (mul *= 0x100)) {\n    val += this[offset + --i] * mul\n  }\n  mul *= 0x80\n\n  if (val >= mul) val -= Math.pow(2, 8 * byteLength)\n\n  return val\n}\n\nBuffer.prototype.readInt8 = function readInt8 (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 1, this.length)\n  if (!(this[offset] & 0x80)) return (this[offset])\n  return ((0xff - this[offset] + 1) * -1)\n}\n\nBuffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset] | (this[offset + 1] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 2, this.length)\n  var val = this[offset + 1] | (this[offset] << 8)\n  return (val & 0x8000) ? val | 0xFFFF0000 : val\n}\n\nBuffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset]) |\n    (this[offset + 1] << 8) |\n    (this[offset + 2] << 16) |\n    (this[offset + 3] << 24)\n}\n\nBuffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n\n  return (this[offset] << 24) |\n    (this[offset + 1] << 16) |\n    (this[offset + 2] << 8) |\n    (this[offset + 3])\n}\n\nBuffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, true, 23, 4)\n}\n\nBuffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 4, this.length)\n  return ieee754.read(this, offset, false, 23, 4)\n}\n\nBuffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, true, 52, 8)\n}\n\nBuffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {\n  if (!noAssert) checkOffset(offset, 8, this.length)\n  return ieee754.read(this, offset, false, 52, 8)\n}\n\nfunction checkInt (buf, value, offset, ext, max, min) {\n  if (!Buffer.isBuffer(buf)) throw new TypeError('\"buffer\" argument must be a Buffer instance')\n  if (value > max || value < min) throw new RangeError('\"value\" argument is out of bounds')\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n}\n\nBuffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var mul = 1\n  var i = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  byteLength = byteLength | 0\n  if (!noAssert) {\n    var maxBytes = Math.pow(2, 8 * byteLength) - 1\n    checkInt(this, value, offset, byteLength, maxBytes, 0)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    this[offset + i] = (value / mul) & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nfunction objectWriteUInt16 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {\n    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>\n      (littleEndian ? i : 1 - i) * 8\n  }\n}\n\nBuffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nfunction objectWriteUInt32 (buf, value, offset, littleEndian) {\n  if (value < 0) value = 0xffffffff + value + 1\n  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {\n    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff\n  }\n}\n\nBuffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset + 3] = (value >>> 24)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 1] = (value >>> 8)\n    this[offset] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = 0\n  var mul = 1\n  var sub = 0\n  this[offset] = value & 0xFF\n  while (++i < byteLength && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) {\n    var limit = Math.pow(2, 8 * byteLength - 1)\n\n    checkInt(this, value, offset, byteLength, limit - 1, -limit)\n  }\n\n  var i = byteLength - 1\n  var mul = 1\n  var sub = 0\n  this[offset + i] = value & 0xFF\n  while (--i >= 0 && (mul *= 0x100)) {\n    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {\n      sub = 1\n    }\n    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF\n  }\n\n  return offset + byteLength\n}\n\nBuffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)\n  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)\n  if (value < 0) value = 0xff + value + 1\n  this[offset] = (value & 0xff)\n  return offset + 1\n}\n\nBuffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n  } else {\n    objectWriteUInt16(this, value, offset, true)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 8)\n    this[offset + 1] = (value & 0xff)\n  } else {\n    objectWriteUInt16(this, value, offset, false)\n  }\n  return offset + 2\n}\n\nBuffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value & 0xff)\n    this[offset + 1] = (value >>> 8)\n    this[offset + 2] = (value >>> 16)\n    this[offset + 3] = (value >>> 24)\n  } else {\n    objectWriteUInt32(this, value, offset, true)\n  }\n  return offset + 4\n}\n\nBuffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {\n  value = +value\n  offset = offset | 0\n  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)\n  if (value < 0) value = 0xffffffff + value + 1\n  if (Buffer.TYPED_ARRAY_SUPPORT) {\n    this[offset] = (value >>> 24)\n    this[offset + 1] = (value >>> 16)\n    this[offset + 2] = (value >>> 8)\n    this[offset + 3] = (value & 0xff)\n  } else {\n    objectWriteUInt32(this, value, offset, false)\n  }\n  return offset + 4\n}\n\nfunction checkIEEE754 (buf, value, offset, ext, max, min) {\n  if (offset + ext > buf.length) throw new RangeError('Index out of range')\n  if (offset < 0) throw new RangeError('Index out of range')\n}\n\nfunction writeFloat (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 23, 4)\n  return offset + 4\n}\n\nBuffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {\n  return writeFloat(this, value, offset, false, noAssert)\n}\n\nfunction writeDouble (buf, value, offset, littleEndian, noAssert) {\n  if (!noAssert) {\n    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)\n  }\n  ieee754.write(buf, value, offset, littleEndian, 52, 8)\n  return offset + 8\n}\n\nBuffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, true, noAssert)\n}\n\nBuffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {\n  return writeDouble(this, value, offset, false, noAssert)\n}\n\n// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)\nBuffer.prototype.copy = function copy (target, targetStart, start, end) {\n  if (!start) start = 0\n  if (!end && end !== 0) end = this.length\n  if (targetStart >= target.length) targetStart = target.length\n  if (!targetStart) targetStart = 0\n  if (end > 0 && end < start) end = start\n\n  // Copy 0 bytes; we're done\n  if (end === start) return 0\n  if (target.length === 0 || this.length === 0) return 0\n\n  // Fatal error conditions\n  if (targetStart < 0) {\n    throw new RangeError('targetStart out of bounds')\n  }\n  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')\n  if (end < 0) throw new RangeError('sourceEnd out of bounds')\n\n  // Are we oob?\n  if (end > this.length) end = this.length\n  if (target.length - targetStart < end - start) {\n    end = target.length - targetStart + start\n  }\n\n  var len = end - start\n  var i\n\n  if (this === target && start < targetStart && targetStart < end) {\n    // descending copy from end\n    for (i = len - 1; i >= 0; --i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {\n    // ascending copy from start\n    for (i = 0; i < len; ++i) {\n      target[i + targetStart] = this[i + start]\n    }\n  } else {\n    Uint8Array.prototype.set.call(\n      target,\n      this.subarray(start, start + len),\n      targetStart\n    )\n  }\n\n  return len\n}\n\n// Usage:\n//    buffer.fill(number[, offset[, end]])\n//    buffer.fill(buffer[, offset[, end]])\n//    buffer.fill(string[, offset[, end]][, encoding])\nBuffer.prototype.fill = function fill (val, start, end, encoding) {\n  // Handle string cases:\n  if (typeof val === 'string') {\n    if (typeof start === 'string') {\n      encoding = start\n      start = 0\n      end = this.length\n    } else if (typeof end === 'string') {\n      encoding = end\n      end = this.length\n    }\n    if (val.length === 1) {\n      var code = val.charCodeAt(0)\n      if (code < 256) {\n        val = code\n      }\n    }\n    if (encoding !== undefined && typeof encoding !== 'string') {\n      throw new TypeError('encoding must be a string')\n    }\n    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {\n      throw new TypeError('Unknown encoding: ' + encoding)\n    }\n  } else if (typeof val === 'number') {\n    val = val & 255\n  }\n\n  // Invalid ranges are not set to a default, so can range check early.\n  if (start < 0 || this.length < start || this.length < end) {\n    throw new RangeError('Out of range index')\n  }\n\n  if (end <= start) {\n    return this\n  }\n\n  start = start >>> 0\n  end = end === undefined ? this.length : end >>> 0\n\n  if (!val) val = 0\n\n  var i\n  if (typeof val === 'number') {\n    for (i = start; i < end; ++i) {\n      this[i] = val\n    }\n  } else {\n    var bytes = Buffer.isBuffer(val)\n      ? val\n      : utf8ToBytes(new Buffer(val, encoding).toString())\n    var len = bytes.length\n    for (i = 0; i < end - start; ++i) {\n      this[i + start] = bytes[i % len]\n    }\n  }\n\n  return this\n}\n\n// HELPER FUNCTIONS\n// ================\n\nvar INVALID_BASE64_RE = /[^+\\/0-9A-Za-z-_]/g\n\nfunction base64clean (str) {\n  // Node strips out invalid characters like \\n and \\t from the string, base64-js does not\n  str = stringtrim(str).replace(INVALID_BASE64_RE, '')\n  // Node converts strings with length < 2 to ''\n  if (str.length < 2) return ''\n  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not\n  while (str.length % 4 !== 0) {\n    str = str + '='\n  }\n  return str\n}\n\nfunction stringtrim (str) {\n  if (str.trim) return str.trim()\n  return str.replace(/^\\s+|\\s+$/g, '')\n}\n\nfunction toHex (n) {\n  if (n < 16) return '0' + n.toString(16)\n  return n.toString(16)\n}\n\nfunction utf8ToBytes (string, units) {\n  units = units || Infinity\n  var codePoint\n  var length = string.length\n  var leadSurrogate = null\n  var bytes = []\n\n  for (var i = 0; i < length; ++i) {\n    codePoint = string.charCodeAt(i)\n\n    // is surrogate component\n    if (codePoint > 0xD7FF && codePoint < 0xE000) {\n      // last char was a lead\n      if (!leadSurrogate) {\n        // no lead yet\n        if (codePoint > 0xDBFF) {\n          // unexpected trail\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        } else if (i + 1 === length) {\n          // unpaired lead\n          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n          continue\n        }\n\n        // valid lead\n        leadSurrogate = codePoint\n\n        continue\n      }\n\n      // 2 leads in a row\n      if (codePoint < 0xDC00) {\n        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n        leadSurrogate = codePoint\n        continue\n      }\n\n      // valid surrogate pair\n      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000\n    } else if (leadSurrogate) {\n      // valid bmp char, but last char was a lead\n      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)\n    }\n\n    leadSurrogate = null\n\n    // encode utf8\n    if (codePoint < 0x80) {\n      if ((units -= 1) < 0) break\n      bytes.push(codePoint)\n    } else if (codePoint < 0x800) {\n      if ((units -= 2) < 0) break\n      bytes.push(\n        codePoint >> 0x6 | 0xC0,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x10000) {\n      if ((units -= 3) < 0) break\n      bytes.push(\n        codePoint >> 0xC | 0xE0,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else if (codePoint < 0x110000) {\n      if ((units -= 4) < 0) break\n      bytes.push(\n        codePoint >> 0x12 | 0xF0,\n        codePoint >> 0xC & 0x3F | 0x80,\n        codePoint >> 0x6 & 0x3F | 0x80,\n        codePoint & 0x3F | 0x80\n      )\n    } else {\n      throw new Error('Invalid code point')\n    }\n  }\n\n  return bytes\n}\n\nfunction asciiToBytes (str) {\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    // Node's code seems to be doing this and not & 0x7F..\n    byteArray.push(str.charCodeAt(i) & 0xFF)\n  }\n  return byteArray\n}\n\nfunction utf16leToBytes (str, units) {\n  var c, hi, lo\n  var byteArray = []\n  for (var i = 0; i < str.length; ++i) {\n    if ((units -= 2) < 0) break\n\n    c = str.charCodeAt(i)\n    hi = c >> 8\n    lo = c % 256\n    byteArray.push(lo)\n    byteArray.push(hi)\n  }\n\n  return byteArray\n}\n\nfunction base64ToBytes (str) {\n  return base64.toByteArray(base64clean(str))\n}\n\nfunction blitBuffer (src, dst, offset, length) {\n  for (var i = 0; i < length; ++i) {\n    if ((i + offset >= dst.length) || (i >= src.length)) break\n    dst[i + offset] = src[i]\n  }\n  return i\n}\n\nfunction isnan (val) {\n  return val !== val // eslint-disable-line no-self-compare\n}\n","var $ = require('../internals/export');\nvar toObject = require('../internals/to-object');\nvar nativeKeys = require('../internals/object-keys');\nvar fails = require('../internals/fails');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeKeys(1); });\n\n// `Object.keys` method\n// https://tc39.es/ecma262/#sec-object.keys\n$({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {\n  keys: function keys(it) {\n    return nativeKeys(toObject(it));\n  }\n});\n","/**\n * @file index.js\n *\n * Index module to easily import the primary components of AES-128\n * decryption. Like this:\n *\n * ```js\n * import {Decrypter, decrypt, AsyncStream} from 'aes-decrypter';\n * ```\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _decrypter = require('./decrypter');\n\nvar _asyncStream = require('./async-stream');\n\nvar _asyncStream2 = _interopRequireDefault(_asyncStream);\n\nexports['default'] = {\n  decrypt: _decrypter.decrypt,\n  Decrypter: _decrypter.Decrypter,\n  AsyncStream: _asyncStream2['default']\n};\nmodule.exports = exports['default'];","var Buffer = require('safe-buffer').Buffer\n\n// prototype class for hash functions\nfunction Hash (blockSize, finalSize) {\n  this._block = Buffer.alloc(blockSize)\n  this._finalSize = finalSize\n  this._blockSize = blockSize\n  this._len = 0\n}\n\nHash.prototype.update = function (data, enc) {\n  if (typeof data === 'string') {\n    enc = enc || 'utf8'\n    data = Buffer.from(data, enc)\n  }\n\n  var block = this._block\n  var blockSize = this._blockSize\n  var length = data.length\n  var accum = this._len\n\n  for (var offset = 0; offset < length;) {\n    var assigned = accum % blockSize\n    var remainder = Math.min(length - offset, blockSize - assigned)\n\n    for (var i = 0; i < remainder; i++) {\n      block[assigned + i] = data[offset + i]\n    }\n\n    accum += remainder\n    offset += remainder\n\n    if ((accum % blockSize) === 0) {\n      this._update(block)\n    }\n  }\n\n  this._len += length\n  return this\n}\n\nHash.prototype.digest = function (enc) {\n  var rem = this._len % this._blockSize\n\n  this._block[rem] = 0x80\n\n  // zero (rem + 1) trailing bits, where (rem + 1) is the smallest\n  // non-negative solution to the equation (length + 1 + (rem + 1)) === finalSize mod blockSize\n  this._block.fill(0, rem + 1)\n\n  if (rem >= this._finalSize) {\n    this._update(this._block)\n    this._block.fill(0)\n  }\n\n  var bits = this._len * 8\n\n  // uint32\n  if (bits <= 0xffffffff) {\n    this._block.writeUInt32BE(bits, this._blockSize - 4)\n\n  // uint64\n  } else {\n    var lowBits = (bits & 0xffffffff) >>> 0\n    var highBits = (bits - lowBits) / 0x100000000\n\n    this._block.writeUInt32BE(highBits, this._blockSize - 8)\n    this._block.writeUInt32BE(lowBits, this._blockSize - 4)\n  }\n\n  this._update(this._block)\n  var hash = this._hash()\n\n  return enc ? hash.toString(enc) : hash\n}\n\nHash.prototype._update = function () {\n  throw new Error('_update must be implemented by subclass')\n}\n\nmodule.exports = Hash\n","var Buffer = require('safe-buffer').Buffer\nvar createHash = require('create-hash')\nvar stream = require('readable-stream')\nvar inherits = require('inherits')\nvar sign = require('./sign')\nvar verify = require('./verify')\n\nvar algorithms = require('./algorithms.json')\nObject.keys(algorithms).forEach(function (key) {\n  algorithms[key].id = Buffer.from(algorithms[key].id, 'hex')\n  algorithms[key.toLowerCase()] = algorithms[key]\n})\n\nfunction Sign (algorithm) {\n  stream.Writable.call(this)\n\n  var data = algorithms[algorithm]\n  if (!data) throw new Error('Unknown message digest')\n\n  this._hashType = data.hash\n  this._hash = createHash(data.hash)\n  this._tag = data.id\n  this._signType = data.sign\n}\ninherits(Sign, stream.Writable)\n\nSign.prototype._write = function _write (data, _, done) {\n  this._hash.update(data)\n  done()\n}\n\nSign.prototype.update = function update (data, enc) {\n  if (typeof data === 'string') data = Buffer.from(data, enc)\n\n  this._hash.update(data)\n  return this\n}\n\nSign.prototype.sign = function signMethod (key, enc) {\n  this.end()\n  var hash = this._hash.digest()\n  var sig = sign(hash, key, this._hashType, this._signType, this._tag)\n\n  return enc ? sig.toString(enc) : sig\n}\n\nfunction Verify (algorithm) {\n  stream.Writable.call(this)\n\n  var data = algorithms[algorithm]\n  if (!data) throw new Error('Unknown message digest')\n\n  this._hash = createHash(data.hash)\n  this._tag = data.id\n  this._signType = data.sign\n}\ninherits(Verify, stream.Writable)\n\nVerify.prototype._write = function _write (data, _, done) {\n  this._hash.update(data)\n  done()\n}\n\nVerify.prototype.update = function update (data, enc) {\n  if (typeof data === 'string') data = Buffer.from(data, enc)\n\n  this._hash.update(data)\n  return this\n}\n\nVerify.prototype.verify = function verifyMethod (key, sig, enc) {\n  if (typeof sig === 'string') sig = Buffer.from(sig, enc)\n\n  this.end()\n  var hash = this._hash.digest()\n  return verify(sig, hash, key, this._signType, this._tag)\n}\n\nfunction createSign (algorithm) {\n  return new Sign(algorithm)\n}\n\nfunction createVerify (algorithm) {\n  return new Verify(algorithm)\n}\n\nmodule.exports = {\n  Sign: createSign,\n  Verify: createVerify,\n  createSign: createSign,\n  createVerify: createVerify\n}\n","var bind = require('../internals/function-bind-context');\nvar IndexedObject = require('../internals/indexed-object');\nvar toObject = require('../internals/to-object');\nvar toLength = require('../internals/to-length');\nvar arraySpeciesCreate = require('../internals/array-species-create');\n\nvar push = [].push;\n\n// `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation\nvar createMethod = function (TYPE) {\n  var IS_MAP = TYPE == 1;\n  var IS_FILTER = TYPE == 2;\n  var IS_SOME = TYPE == 3;\n  var IS_EVERY = TYPE == 4;\n  var IS_FIND_INDEX = TYPE == 6;\n  var IS_FILTER_OUT = TYPE == 7;\n  var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;\n  return function ($this, callbackfn, that, specificCreate) {\n    var O = toObject($this);\n    var self = IndexedObject(O);\n    var boundFunction = bind(callbackfn, that, 3);\n    var length = toLength(self.length);\n    var index = 0;\n    var create = specificCreate || arraySpeciesCreate;\n    var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;\n    var value, result;\n    for (;length > index; index++) if (NO_HOLES || index in self) {\n      value = self[index];\n      result = boundFunction(value, index, O);\n      if (TYPE) {\n        if (IS_MAP) target[index] = result; // map\n        else if (result) switch (TYPE) {\n          case 3: return true;              // some\n          case 5: return value;             // find\n          case 6: return index;             // findIndex\n          case 2: push.call(target, value); // filter\n        } else switch (TYPE) {\n          case 4: return false;             // every\n          case 7: push.call(target, value); // filterOut\n        }\n      }\n    }\n    return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;\n  };\n};\n\nmodule.exports = {\n  // `Array.prototype.forEach` method\n  // https://tc39.es/ecma262/#sec-array.prototype.foreach\n  forEach: createMethod(0),\n  // `Array.prototype.map` method\n  // https://tc39.es/ecma262/#sec-array.prototype.map\n  map: createMethod(1),\n  // `Array.prototype.filter` method\n  // https://tc39.es/ecma262/#sec-array.prototype.filter\n  filter: createMethod(2),\n  // `Array.prototype.some` method\n  // https://tc39.es/ecma262/#sec-array.prototype.some\n  some: createMethod(3),\n  // `Array.prototype.every` method\n  // https://tc39.es/ecma262/#sec-array.prototype.every\n  every: createMethod(4),\n  // `Array.prototype.find` method\n  // https://tc39.es/ecma262/#sec-array.prototype.find\n  find: createMethod(5),\n  // `Array.prototype.findIndex` method\n  // https://tc39.es/ecma262/#sec-array.prototype.findIndex\n  findIndex: createMethod(6),\n  // `Array.prototype.filterOut` method\n  // https://github.com/tc39/proposal-array-filtering\n  filterOut: createMethod(7)\n};\n","'use strict';\n\nvar BN = require('bn.js');\n\nvar utils = require('../utils');\nvar assert = utils.assert;\n\nfunction Signature(options, enc) {\n  if (options instanceof Signature)\n    return options;\n\n  if (this._importDER(options, enc))\n    return;\n\n  assert(options.r && options.s, 'Signature without r or s');\n  this.r = new BN(options.r, 16);\n  this.s = new BN(options.s, 16);\n  if (options.recoveryParam === undefined)\n    this.recoveryParam = null;\n  else\n    this.recoveryParam = options.recoveryParam;\n}\nmodule.exports = Signature;\n\nfunction Position() {\n  this.place = 0;\n}\n\nfunction getLength(buf, p) {\n  var initial = buf[p.place++];\n  if (!(initial & 0x80)) {\n    return initial;\n  }\n  var octetLen = initial & 0xf;\n\n  // Indefinite length or overflow\n  if (octetLen === 0 || octetLen > 4) {\n    return false;\n  }\n\n  var val = 0;\n  for (var i = 0, off = p.place; i < octetLen; i++, off++) {\n    val <<= 8;\n    val |= buf[off];\n    val >>>= 0;\n  }\n\n  // Leading zeroes\n  if (val <= 0x7f) {\n    return false;\n  }\n\n  p.place = off;\n  return val;\n}\n\nfunction rmPadding(buf) {\n  var i = 0;\n  var len = buf.length - 1;\n  while (!buf[i] && !(buf[i + 1] & 0x80) && i < len) {\n    i++;\n  }\n  if (i === 0) {\n    return buf;\n  }\n  return buf.slice(i);\n}\n\nSignature.prototype._importDER = function _importDER(data, enc) {\n  data = utils.toArray(data, enc);\n  var p = new Position();\n  if (data[p.place++] !== 0x30) {\n    return false;\n  }\n  var len = getLength(data, p);\n  if (len === false) {\n    return false;\n  }\n  if ((len + p.place) !== data.length) {\n    return false;\n  }\n  if (data[p.place++] !== 0x02) {\n    return false;\n  }\n  var rlen = getLength(data, p);\n  if (rlen === false) {\n    return false;\n  }\n  var r = data.slice(p.place, rlen + p.place);\n  p.place += rlen;\n  if (data[p.place++] !== 0x02) {\n    return false;\n  }\n  var slen = getLength(data, p);\n  if (slen === false) {\n    return false;\n  }\n  if (data.length !== slen + p.place) {\n    return false;\n  }\n  var s = data.slice(p.place, slen + p.place);\n  if (r[0] === 0) {\n    if (r[1] & 0x80) {\n      r = r.slice(1);\n    } else {\n      // Leading zeroes\n      return false;\n    }\n  }\n  if (s[0] === 0) {\n    if (s[1] & 0x80) {\n      s = s.slice(1);\n    } else {\n      // Leading zeroes\n      return false;\n    }\n  }\n\n  this.r = new BN(r);\n  this.s = new BN(s);\n  this.recoveryParam = null;\n\n  return true;\n};\n\nfunction constructLength(arr, len) {\n  if (len < 0x80) {\n    arr.push(len);\n    return;\n  }\n  var octets = 1 + (Math.log(len) / Math.LN2 >>> 3);\n  arr.push(octets | 0x80);\n  while (--octets) {\n    arr.push((len >>> (octets << 3)) & 0xff);\n  }\n  arr.push(len);\n}\n\nSignature.prototype.toDER = function toDER(enc) {\n  var r = this.r.toArray();\n  var s = this.s.toArray();\n\n  // Pad values\n  if (r[0] & 0x80)\n    r = [ 0 ].concat(r);\n  // Pad values\n  if (s[0] & 0x80)\n    s = [ 0 ].concat(s);\n\n  r = rmPadding(r);\n  s = rmPadding(s);\n\n  while (!s[0] && !(s[1] & 0x80)) {\n    s = s.slice(1);\n  }\n  var arr = [ 0x02 ];\n  constructLength(arr, r.length);\n  arr = arr.concat(r);\n  arr.push(0x02);\n  constructLength(arr, s.length);\n  var backHalf = arr.concat(s);\n  var res = [ 0x30 ];\n  constructLength(res, backHalf.length);\n  res = res.concat(backHalf);\n  return utils.encode(res, enc);\n};\n","export const HOOK_SETUP = 'devtools-plugin:setup';\nexport const HOOK_PLUGIN_SETTINGS_SET = 'plugin:settings:set';\n","\n/**\n * Module exports.\n */\n\nmodule.exports = deprecate;\n\n/**\n * Mark that a method should not be used.\n * Returns a modified function which warns once by default.\n *\n * If `localStorage.noDeprecation = true` is set, then it is a no-op.\n *\n * If `localStorage.throwDeprecation = true` is set, then deprecated functions\n * will throw an Error when invoked.\n *\n * If `localStorage.traceDeprecation = true` is set, then deprecated functions\n * will invoke `console.trace()` instead of `console.error()`.\n *\n * @param {Function} fn - the function to deprecate\n * @param {String} msg - the string to print to the console when `fn` is invoked\n * @returns {Function} a new \"deprecated\" version of `fn`\n * @api public\n */\n\nfunction deprecate (fn, msg) {\n  if (config('noDeprecation')) {\n    return fn;\n  }\n\n  var warned = false;\n  function deprecated() {\n    if (!warned) {\n      if (config('throwDeprecation')) {\n        throw new Error(msg);\n      } else if (config('traceDeprecation')) {\n        console.trace(msg);\n      } else {\n        console.warn(msg);\n      }\n      warned = true;\n    }\n    return fn.apply(this, arguments);\n  }\n\n  return deprecated;\n}\n\n/**\n * Checks `localStorage` for boolean values for the given `name`.\n *\n * @param {String} name\n * @returns {Boolean}\n * @api private\n */\n\nfunction config (name) {\n  // accessing global.localStorage can trigger a DOMException in sandboxed iframes\n  try {\n    if (!global.localStorage) return false;\n  } catch (_) {\n    return false;\n  }\n  var val = global.localStorage[name];\n  if (null == val) return false;\n  return String(val).toLowerCase() === 'true';\n}\n","var inherits = require('inherits')\nvar SHA512 = require('./sha512')\nvar Hash = require('./hash')\nvar Buffer = require('safe-buffer').Buffer\n\nvar W = new Array(160)\n\nfunction Sha384 () {\n  this.init()\n  this._w = W\n\n  Hash.call(this, 128, 112)\n}\n\ninherits(Sha384, SHA512)\n\nSha384.prototype.init = function () {\n  this._ah = 0xcbbb9d5d\n  this._bh = 0x629a292a\n  this._ch = 0x9159015a\n  this._dh = 0x152fecd8\n  this._eh = 0x67332667\n  this._fh = 0x8eb44a87\n  this._gh = 0xdb0c2e0d\n  this._hh = 0x47b5481d\n\n  this._al = 0xc1059ed8\n  this._bl = 0x367cd507\n  this._cl = 0x3070dd17\n  this._dl = 0xf70e5939\n  this._el = 0xffc00b31\n  this._fl = 0x68581511\n  this._gl = 0x64f98fa7\n  this._hl = 0xbefa4fa4\n\n  return this\n}\n\nSha384.prototype._hash = function () {\n  var H = Buffer.allocUnsafe(48)\n\n  function writeInt64BE (h, l, offset) {\n    H.writeInt32BE(h, offset)\n    H.writeInt32BE(l, offset + 4)\n  }\n\n  writeInt64BE(this._ah, this._al, 0)\n  writeInt64BE(this._bh, this._bl, 8)\n  writeInt64BE(this._ch, this._cl, 16)\n  writeInt64BE(this._dh, this._dl, 24)\n  writeInt64BE(this._eh, this._el, 32)\n  writeInt64BE(this._fh, this._fl, 40)\n\n  return H\n}\n\nmodule.exports = Sha384\n","import unsupportedIterableToArray from \"./unsupportedIterableToArray.js\";\nexport default function _createForOfIteratorHelper(o, allowArrayLike) {\n  var it;\n\n  if (typeof Symbol === \"undefined\" || o[Symbol.iterator] == null) {\n    if (Array.isArray(o) || (it = unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === \"number\") {\n      if (it) o = it;\n      var i = 0;\n\n      var F = function F() {};\n\n      return {\n        s: F,\n        n: function n() {\n          if (i >= o.length) return {\n            done: true\n          };\n          return {\n            done: false,\n            value: o[i++]\n          };\n        },\n        e: function e(_e) {\n          throw _e;\n        },\n        f: F\n      };\n    }\n\n    throw new TypeError(\"Invalid attempt to iterate non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n  }\n\n  var normalCompletion = true,\n      didErr = false,\n      err;\n  return {\n    s: function s() {\n      it = o[Symbol.iterator]();\n    },\n    n: function n() {\n      var step = it.next();\n      normalCompletion = step.done;\n      return step;\n    },\n    e: function e(_e2) {\n      didErr = true;\n      err = _e2;\n    },\n    f: function f() {\n      try {\n        if (!normalCompletion && it[\"return\"] != null) it[\"return\"]();\n      } finally {\n        if (didErr) throw err;\n      }\n    }\n  };\n}",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./x64-core\"), require(\"./sha512\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./x64-core\", \"./sha512\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_x64 = C.x64;\n\t    var X64Word = C_x64.Word;\n\t    var X64WordArray = C_x64.WordArray;\n\t    var C_algo = C.algo;\n\t    var SHA512 = C_algo.SHA512;\n\n\t    /**\n\t     * SHA-384 hash algorithm.\n\t     */\n\t    var SHA384 = C_algo.SHA384 = SHA512.extend({\n\t        _doReset: function () {\n\t            this._hash = new X64WordArray.init([\n\t                new X64Word.init(0xcbbb9d5d, 0xc1059ed8), new X64Word.init(0x629a292a, 0x367cd507),\n\t                new X64Word.init(0x9159015a, 0x3070dd17), new X64Word.init(0x152fecd8, 0xf70e5939),\n\t                new X64Word.init(0x67332667, 0xffc00b31), new X64Word.init(0x8eb44a87, 0x68581511),\n\t                new X64Word.init(0xdb0c2e0d, 0x64f98fa7), new X64Word.init(0x47b5481d, 0xbefa4fa4)\n\t            ]);\n\t        },\n\n\t        _doFinalize: function () {\n\t            var hash = SHA512._doFinalize.call(this);\n\n\t            hash.sigBytes -= 16;\n\n\t            return hash;\n\t        }\n\t    });\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.SHA384('message');\n\t     *     var hash = CryptoJS.SHA384(wordArray);\n\t     */\n\t    C.SHA384 = SHA512._createHelper(SHA384);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacSHA384(message, key);\n\t     */\n\t    C.HmacSHA384 = SHA512._createHmacHelper(SHA384);\n\t}());\n\n\n\treturn CryptoJS.SHA384;\n\n}));",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * A noop padding strategy.\n\t */\n\tCryptoJS.pad.NoPadding = {\n\t    pad: function () {\n\t    },\n\n\t    unpad: function () {\n\t    }\n\t};\n\n\n\treturn CryptoJS.pad.NoPadding;\n\n}));","'use strict';\n\nvar BN = require('bn.js');\nvar HmacDRBG = require('hmac-drbg');\nvar utils = require('../utils');\nvar curves = require('../curves');\nvar rand = require('brorand');\nvar assert = utils.assert;\n\nvar KeyPair = require('./key');\nvar Signature = require('./signature');\n\nfunction EC(options) {\n  if (!(this instanceof EC))\n    return new EC(options);\n\n  // Shortcut `elliptic.ec(curve-name)`\n  if (typeof options === 'string') {\n    assert(Object.prototype.hasOwnProperty.call(curves, options),\n      'Unknown curve ' + options);\n\n    options = curves[options];\n  }\n\n  // Shortcut for `elliptic.ec(elliptic.curves.curveName)`\n  if (options instanceof curves.PresetCurve)\n    options = { curve: options };\n\n  this.curve = options.curve.curve;\n  this.n = this.curve.n;\n  this.nh = this.n.ushrn(1);\n  this.g = this.curve.g;\n\n  // Point on curve\n  this.g = options.curve.g;\n  this.g.precompute(options.curve.n.bitLength() + 1);\n\n  // Hash for function for DRBG\n  this.hash = options.hash || options.curve.hash;\n}\nmodule.exports = EC;\n\nEC.prototype.keyPair = function keyPair(options) {\n  return new KeyPair(this, options);\n};\n\nEC.prototype.keyFromPrivate = function keyFromPrivate(priv, enc) {\n  return KeyPair.fromPrivate(this, priv, enc);\n};\n\nEC.prototype.keyFromPublic = function keyFromPublic(pub, enc) {\n  return KeyPair.fromPublic(this, pub, enc);\n};\n\nEC.prototype.genKeyPair = function genKeyPair(options) {\n  if (!options)\n    options = {};\n\n  // Instantiate Hmac_DRBG\n  var drbg = new HmacDRBG({\n    hash: this.hash,\n    pers: options.pers,\n    persEnc: options.persEnc || 'utf8',\n    entropy: options.entropy || rand(this.hash.hmacStrength),\n    entropyEnc: options.entropy && options.entropyEnc || 'utf8',\n    nonce: this.n.toArray(),\n  });\n\n  var bytes = this.n.byteLength();\n  var ns2 = this.n.sub(new BN(2));\n  for (;;) {\n    var priv = new BN(drbg.generate(bytes));\n    if (priv.cmp(ns2) > 0)\n      continue;\n\n    priv.iaddn(1);\n    return this.keyFromPrivate(priv);\n  }\n};\n\nEC.prototype._truncateToN = function _truncateToN(msg, truncOnly) {\n  var delta = msg.byteLength() * 8 - this.n.bitLength();\n  if (delta > 0)\n    msg = msg.ushrn(delta);\n  if (!truncOnly && msg.cmp(this.n) >= 0)\n    return msg.sub(this.n);\n  else\n    return msg;\n};\n\nEC.prototype.sign = function sign(msg, key, enc, options) {\n  if (typeof enc === 'object') {\n    options = enc;\n    enc = null;\n  }\n  if (!options)\n    options = {};\n\n  key = this.keyFromPrivate(key, enc);\n  msg = this._truncateToN(new BN(msg, 16));\n\n  // Zero-extend key to provide enough entropy\n  var bytes = this.n.byteLength();\n  var bkey = key.getPrivate().toArray('be', bytes);\n\n  // Zero-extend nonce to have the same byte size as N\n  var nonce = msg.toArray('be', bytes);\n\n  // Instantiate Hmac_DRBG\n  var drbg = new HmacDRBG({\n    hash: this.hash,\n    entropy: bkey,\n    nonce: nonce,\n    pers: options.pers,\n    persEnc: options.persEnc || 'utf8',\n  });\n\n  // Number of bytes to generate\n  var ns1 = this.n.sub(new BN(1));\n\n  for (var iter = 0; ; iter++) {\n    var k = options.k ?\n      options.k(iter) :\n      new BN(drbg.generate(this.n.byteLength()));\n    k = this._truncateToN(k, true);\n    if (k.cmpn(1) <= 0 || k.cmp(ns1) >= 0)\n      continue;\n\n    var kp = this.g.mul(k);\n    if (kp.isInfinity())\n      continue;\n\n    var kpX = kp.getX();\n    var r = kpX.umod(this.n);\n    if (r.cmpn(0) === 0)\n      continue;\n\n    var s = k.invm(this.n).mul(r.mul(key.getPrivate()).iadd(msg));\n    s = s.umod(this.n);\n    if (s.cmpn(0) === 0)\n      continue;\n\n    var recoveryParam = (kp.getY().isOdd() ? 1 : 0) |\n                        (kpX.cmp(r) !== 0 ? 2 : 0);\n\n    // Use complement of `s`, if it is > `n / 2`\n    if (options.canonical && s.cmp(this.nh) > 0) {\n      s = this.n.sub(s);\n      recoveryParam ^= 1;\n    }\n\n    return new Signature({ r: r, s: s, recoveryParam: recoveryParam });\n  }\n};\n\nEC.prototype.verify = function verify(msg, signature, key, enc) {\n  msg = this._truncateToN(new BN(msg, 16));\n  key = this.keyFromPublic(key, enc);\n  signature = new Signature(signature, 'hex');\n\n  // Perform primitive values validation\n  var r = signature.r;\n  var s = signature.s;\n  if (r.cmpn(1) < 0 || r.cmp(this.n) >= 0)\n    return false;\n  if (s.cmpn(1) < 0 || s.cmp(this.n) >= 0)\n    return false;\n\n  // Validate signature\n  var sinv = s.invm(this.n);\n  var u1 = sinv.mul(msg).umod(this.n);\n  var u2 = sinv.mul(r).umod(this.n);\n  var p;\n\n  if (!this.curve._maxwellTrick) {\n    p = this.g.mulAdd(u1, key.getPublic(), u2);\n    if (p.isInfinity())\n      return false;\n\n    return p.getX().umod(this.n).cmp(r) === 0;\n  }\n\n  // NOTE: Greg Maxwell's trick, inspired by:\n  // https://git.io/vad3K\n\n  p = this.g.jmulAdd(u1, key.getPublic(), u2);\n  if (p.isInfinity())\n    return false;\n\n  // Compare `p.x` of Jacobian point with `r`,\n  // this will do `p.x == r * p.z^2` instead of multiplying `p.x` by the\n  // inverse of `p.z^2`\n  return p.eqXToP(r);\n};\n\nEC.prototype.recoverPubKey = function(msg, signature, j, enc) {\n  assert((3 & j) === j, 'The recovery param is more than two bits');\n  signature = new Signature(signature, enc);\n\n  var n = this.n;\n  var e = new BN(msg);\n  var r = signature.r;\n  var s = signature.s;\n\n  // A set LSB signifies that the y-coordinate is odd\n  var isYOdd = j & 1;\n  var isSecondKey = j >> 1;\n  if (r.cmp(this.curve.p.umod(this.curve.n)) >= 0 && isSecondKey)\n    throw new Error('Unable to find sencond key candinate');\n\n  // 1.1. Let x = r + jn.\n  if (isSecondKey)\n    r = this.curve.pointFromX(r.add(this.curve.n), isYOdd);\n  else\n    r = this.curve.pointFromX(r, isYOdd);\n\n  var rInv = signature.r.invm(n);\n  var s1 = n.sub(e).mul(rInv).umod(n);\n  var s2 = s.mul(rInv).umod(n);\n\n  // 1.6.1 Compute Q = r^-1 (sR -  eG)\n  //               Q = r^-1 (sR + -eG)\n  return this.g.mulAdd(s1, r, s2);\n};\n\nEC.prototype.getKeyRecoveryParam = function(e, signature, Q, enc) {\n  signature = new Signature(signature, enc);\n  if (signature.recoveryParam !== null)\n    return signature.recoveryParam;\n\n  for (var i = 0; i < 4; i++) {\n    var Qprime;\n    try {\n      Qprime = this.recoverPubKey(e, signature, i);\n    } catch (e) {\n      continue;\n    }\n\n    if (Qprime.eq(Q))\n      return i;\n  }\n  throw new Error('Unable to find valid recovery factor');\n};\n","'use strict';\n\nvar ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;\n\nfunction highWaterMarkFrom(options, isDuplex, duplexKey) {\n  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;\n}\n\nfunction getHighWaterMark(state, options, duplexKey, isDuplex) {\n  var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);\n\n  if (hwm != null) {\n    if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {\n      var name = isDuplex ? duplexKey : 'highWaterMark';\n      throw new ERR_INVALID_OPT_VALUE(name, hwm);\n    }\n\n    return Math.floor(hwm);\n  } // Default value\n\n\n  return state.objectMode ? 16 : 16 * 1024;\n}\n\nmodule.exports = {\n  getHighWaterMark: getHighWaterMark\n};","/**\n * @file add-text-track-data.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\n/**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\nvar deprecateOldCue = function deprecateOldCue(cue) {\n  Object.defineProperties(cue.frame, {\n    id: {\n      get: function get() {\n        _videoJs2['default'].log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n        return cue.value.key;\n      }\n    },\n    value: {\n      get: function get() {\n        _videoJs2['default'].log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    },\n    privateData: {\n      get: function get() {\n        _videoJs2['default'].log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    }\n  });\n};\n\nvar durationOfVideo = function durationOfVideo(duration) {\n  var dur = undefined;\n\n  if (isNaN(duration) || Math.abs(duration) === Infinity) {\n    dur = Number.MAX_VALUE;\n  } else {\n    dur = duration;\n  }\n  return dur;\n};\n/**\n * Add text track data to a source handler given the captions and\n * metadata from the buffer.\n *\n * @param {Object} sourceHandler the flash or virtual source buffer\n * @param {Array} captionArray an array of caption data\n * @param {Array} metadataArray an array of meta data\n * @private\n */\nvar addTextTrackData = function addTextTrackData(sourceHandler, captionArray, metadataArray) {\n  var Cue = _globalWindow2['default'].WebKitDataCue || _globalWindow2['default'].VTTCue;\n\n  if (captionArray) {\n    captionArray.forEach(function (caption) {\n      var track = caption.stream;\n\n      this.inbandTextTracks_[track].addCue(new Cue(caption.startTime + this.timestampOffset, caption.endTime + this.timestampOffset, caption.text));\n    }, sourceHandler);\n  }\n\n  if (metadataArray) {\n    (function () {\n      var videoDuration = durationOfVideo(sourceHandler.mediaSource_.duration);\n\n      metadataArray.forEach(function (metadata) {\n        var time = metadata.cueTime + this.timestampOffset;\n\n        metadata.frames.forEach(function (frame) {\n          var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n\n          cue.frame = frame;\n          cue.value = frame;\n          deprecateOldCue(cue);\n\n          this.metadataTrack_.addCue(cue);\n        }, this);\n      }, sourceHandler);\n\n      // Updating the metadeta cues so that\n      // the endTime of each cue is the startTime of the next cue\n      // the endTime of last cue is the duration of the video\n      if (sourceHandler.metadataTrack_ && sourceHandler.metadataTrack_.cues && sourceHandler.metadataTrack_.cues.length) {\n        (function () {\n          var cues = sourceHandler.metadataTrack_.cues;\n          var cuesArray = [];\n\n          // Create a copy of the TextTrackCueList...\n          // ...disregarding cues with a falsey value\n          for (var i = 0; i < cues.length; i++) {\n            if (cues[i]) {\n              cuesArray.push(cues[i]);\n            }\n          }\n\n          // Group cues by their startTime value\n          var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {\n            var timeSlot = obj[cue.startTime] || [];\n\n            timeSlot.push(cue);\n            obj[cue.startTime] = timeSlot;\n\n            return obj;\n          }, {});\n\n          // Sort startTimes by ascending order\n          var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {\n            return Number(a) - Number(b);\n          });\n\n          // Map each cue group's endTime to the next group's startTime\n          sortedStartTimes.forEach(function (startTime, idx) {\n            var cueGroup = cuesGroupedByStartTime[startTime];\n            var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration;\n\n            // Map each cue's endTime the next group's startTime\n            cueGroup.forEach(function (cue) {\n              cue.endTime = nextTime;\n            });\n          });\n        })();\n      }\n    })();\n  }\n};\n\nexports['default'] = {\n  addTextTrackData: addTextTrackData,\n  durationOfVideo: durationOfVideo\n};\nmodule.exports = exports['default'];","var modeModules = {\n  ECB: require('./ecb'),\n  CBC: require('./cbc'),\n  CFB: require('./cfb'),\n  CFB8: require('./cfb8'),\n  CFB1: require('./cfb1'),\n  OFB: require('./ofb'),\n  CTR: require('./ctr'),\n  GCM: require('./ctr')\n}\n\nvar modes = require('./list.json')\n\nfor (var key in modes) {\n  modes[key].module = modeModules[modes[key].mode]\n}\n\nmodule.exports = modes\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n  // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing\n  return Object.isExtensible(Object.preventExtensions({}));\n});\n","'use strict';\n\nvar BN = require('bn.js');\nvar utils = require('../utils');\nvar assert = utils.assert;\n\nfunction KeyPair(ec, options) {\n  this.ec = ec;\n  this.priv = null;\n  this.pub = null;\n\n  // KeyPair(ec, { priv: ..., pub: ... })\n  if (options.priv)\n    this._importPrivate(options.priv, options.privEnc);\n  if (options.pub)\n    this._importPublic(options.pub, options.pubEnc);\n}\nmodule.exports = KeyPair;\n\nKeyPair.fromPublic = function fromPublic(ec, pub, enc) {\n  if (pub instanceof KeyPair)\n    return pub;\n\n  return new KeyPair(ec, {\n    pub: pub,\n    pubEnc: enc,\n  });\n};\n\nKeyPair.fromPrivate = function fromPrivate(ec, priv, enc) {\n  if (priv instanceof KeyPair)\n    return priv;\n\n  return new KeyPair(ec, {\n    priv: priv,\n    privEnc: enc,\n  });\n};\n\nKeyPair.prototype.validate = function validate() {\n  var pub = this.getPublic();\n\n  if (pub.isInfinity())\n    return { result: false, reason: 'Invalid public key' };\n  if (!pub.validate())\n    return { result: false, reason: 'Public key is not a point' };\n  if (!pub.mul(this.ec.curve.n).isInfinity())\n    return { result: false, reason: 'Public key * N != O' };\n\n  return { result: true, reason: null };\n};\n\nKeyPair.prototype.getPublic = function getPublic(compact, enc) {\n  // compact is optional argument\n  if (typeof compact === 'string') {\n    enc = compact;\n    compact = null;\n  }\n\n  if (!this.pub)\n    this.pub = this.ec.g.mul(this.priv);\n\n  if (!enc)\n    return this.pub;\n\n  return this.pub.encode(enc, compact);\n};\n\nKeyPair.prototype.getPrivate = function getPrivate(enc) {\n  if (enc === 'hex')\n    return this.priv.toString(16, 2);\n  else\n    return this.priv;\n};\n\nKeyPair.prototype._importPrivate = function _importPrivate(key, enc) {\n  this.priv = new BN(key, enc || 16);\n\n  // Ensure that the priv won't be bigger than n, otherwise we may fail\n  // in fixed multiplication method\n  this.priv = this.priv.umod(this.ec.curve.n);\n};\n\nKeyPair.prototype._importPublic = function _importPublic(key, enc) {\n  if (key.x || key.y) {\n    // Montgomery points only have an `x` coordinate.\n    // Weierstrass/Edwards points on the other hand have both `x` and\n    // `y` coordinates.\n    if (this.ec.curve.type === 'mont') {\n      assert(key.x, 'Need x coordinate');\n    } else if (this.ec.curve.type === 'short' ||\n               this.ec.curve.type === 'edwards') {\n      assert(key.x && key.y, 'Need both x and y coordinate');\n    }\n    this.pub = this.ec.curve.point(key.x, key.y);\n    return;\n  }\n  this.pub = this.ec.curve.decodePoint(key, enc);\n};\n\n// ECDH\nKeyPair.prototype.derive = function derive(pub) {\n  if(!pub.validate()) {\n    assert(pub.validate(), 'public point not validated');\n  }\n  return pub.mul(this.priv).getX();\n};\n\n// ECDSA\nKeyPair.prototype.sign = function sign(msg, enc, options) {\n  return this.ec.sign(msg, this, enc, options);\n};\n\nKeyPair.prototype.verify = function verify(msg, signature) {\n  return this.ec.verify(msg, signature, this);\n};\n\nKeyPair.prototype.inspect = function inspect() {\n  return '<Key priv: ' + (this.priv && this.priv.toString(16, 2)) +\n         ' pub: ' + (this.pub && this.pub.inspect()) + ' >';\n};\n","'use strict';\n\nvar utils = require('./utils');\nvar common = require('./common');\n\nvar rotl32 = utils.rotl32;\nvar sum32 = utils.sum32;\nvar sum32_3 = utils.sum32_3;\nvar sum32_4 = utils.sum32_4;\nvar BlockHash = common.BlockHash;\n\nfunction RIPEMD160() {\n  if (!(this instanceof RIPEMD160))\n    return new RIPEMD160();\n\n  BlockHash.call(this);\n\n  this.h = [ 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 ];\n  this.endian = 'little';\n}\nutils.inherits(RIPEMD160, BlockHash);\nexports.ripemd160 = RIPEMD160;\n\nRIPEMD160.blockSize = 512;\nRIPEMD160.outSize = 160;\nRIPEMD160.hmacStrength = 192;\nRIPEMD160.padLength = 64;\n\nRIPEMD160.prototype._update = function update(msg, start) {\n  var A = this.h[0];\n  var B = this.h[1];\n  var C = this.h[2];\n  var D = this.h[3];\n  var E = this.h[4];\n  var Ah = A;\n  var Bh = B;\n  var Ch = C;\n  var Dh = D;\n  var Eh = E;\n  for (var j = 0; j < 80; j++) {\n    var T = sum32(\n      rotl32(\n        sum32_4(A, f(j, B, C, D), msg[r[j] + start], K(j)),\n        s[j]),\n      E);\n    A = E;\n    E = D;\n    D = rotl32(C, 10);\n    C = B;\n    B = T;\n    T = sum32(\n      rotl32(\n        sum32_4(Ah, f(79 - j, Bh, Ch, Dh), msg[rh[j] + start], Kh(j)),\n        sh[j]),\n      Eh);\n    Ah = Eh;\n    Eh = Dh;\n    Dh = rotl32(Ch, 10);\n    Ch = Bh;\n    Bh = T;\n  }\n  T = sum32_3(this.h[1], C, Dh);\n  this.h[1] = sum32_3(this.h[2], D, Eh);\n  this.h[2] = sum32_3(this.h[3], E, Ah);\n  this.h[3] = sum32_3(this.h[4], A, Bh);\n  this.h[4] = sum32_3(this.h[0], B, Ch);\n  this.h[0] = T;\n};\n\nRIPEMD160.prototype._digest = function digest(enc) {\n  if (enc === 'hex')\n    return utils.toHex32(this.h, 'little');\n  else\n    return utils.split32(this.h, 'little');\n};\n\nfunction f(j, x, y, z) {\n  if (j <= 15)\n    return x ^ y ^ z;\n  else if (j <= 31)\n    return (x & y) | ((~x) & z);\n  else if (j <= 47)\n    return (x | (~y)) ^ z;\n  else if (j <= 63)\n    return (x & z) | (y & (~z));\n  else\n    return x ^ (y | (~z));\n}\n\nfunction K(j) {\n  if (j <= 15)\n    return 0x00000000;\n  else if (j <= 31)\n    return 0x5a827999;\n  else if (j <= 47)\n    return 0x6ed9eba1;\n  else if (j <= 63)\n    return 0x8f1bbcdc;\n  else\n    return 0xa953fd4e;\n}\n\nfunction Kh(j) {\n  if (j <= 15)\n    return 0x50a28be6;\n  else if (j <= 31)\n    return 0x5c4dd124;\n  else if (j <= 47)\n    return 0x6d703ef3;\n  else if (j <= 63)\n    return 0x7a6d76e9;\n  else\n    return 0x00000000;\n}\n\nvar r = [\n  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,\n  7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,\n  3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,\n  1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,\n  4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13\n];\n\nvar rh = [\n  5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,\n  6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,\n  15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,\n  8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,\n  12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11\n];\n\nvar s = [\n  11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,\n  7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,\n  11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,\n  11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,\n  9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6\n];\n\nvar sh = [\n  8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,\n  9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,\n  9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,\n  15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,\n  8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11\n];\n","'use strict';\n\nvar Stream = require('../utils/stream.js');\nvar FlvTag = require('./flv-tag.js');\nvar m2ts = require('../m2ts/m2ts.js');\nvar AdtsStream = require('../codecs/adts.js');\nvar H264Stream = require('../codecs/h264').H264Stream;\nvar CoalesceStream = require('./coalesce-stream.js');\nvar TagList = require('./tag-list.js');\n\nvar\n  Transmuxer,\n  VideoSegmentStream,\n  AudioSegmentStream,\n  collectTimelineInfo,\n  metaDataTag,\n  extraDataTag;\n\n/**\n * Store information about the start and end of the tracka and the\n * duration for each frame/sample we process in order to calculate\n * the baseMediaDecodeTime\n */\ncollectTimelineInfo = function(track, data) {\n  if (typeof data.pts === 'number') {\n    if (track.timelineStartInfo.pts === undefined) {\n      track.timelineStartInfo.pts = data.pts;\n    } else {\n      track.timelineStartInfo.pts =\n        Math.min(track.timelineStartInfo.pts, data.pts);\n    }\n  }\n\n  if (typeof data.dts === 'number') {\n    if (track.timelineStartInfo.dts === undefined) {\n      track.timelineStartInfo.dts = data.dts;\n    } else {\n      track.timelineStartInfo.dts =\n        Math.min(track.timelineStartInfo.dts, data.dts);\n    }\n  }\n};\n\nmetaDataTag = function(track, pts) {\n  var\n    tag = new FlvTag(FlvTag.METADATA_TAG); // :FlvTag\n\n  tag.dts = pts;\n  tag.pts = pts;\n\n  tag.writeMetaDataDouble('videocodecid', 7);\n  tag.writeMetaDataDouble('width', track.width);\n  tag.writeMetaDataDouble('height', track.height);\n\n  return tag;\n};\n\nextraDataTag = function(track, pts) {\n  var\n    i,\n    tag = new FlvTag(FlvTag.VIDEO_TAG, true);\n\n  tag.dts = pts;\n  tag.pts = pts;\n\n  tag.writeByte(0x01);// version\n  tag.writeByte(track.profileIdc);// profile\n  tag.writeByte(track.profileCompatibility);// compatibility\n  tag.writeByte(track.levelIdc);// level\n  tag.writeByte(0xFC | 0x03); // reserved (6 bits), NULA length size - 1 (2 bits)\n  tag.writeByte(0xE0 | 0x01); // reserved (3 bits), num of SPS (5 bits)\n  tag.writeShort(track.sps[0].length); // data of SPS\n  tag.writeBytes(track.sps[0]); // SPS\n\n  tag.writeByte(track.pps.length); // num of PPS (will there ever be more that 1 PPS?)\n  for (i = 0; i < track.pps.length; ++i) {\n    tag.writeShort(track.pps[i].length); // 2 bytes for length of PPS\n    tag.writeBytes(track.pps[i]); // data of PPS\n  }\n\n  return tag;\n};\n\n/**\n * Constructs a single-track, media segment from AAC data\n * events. The output of this stream can be fed to flash.\n */\nAudioSegmentStream = function(track) {\n  var\n    adtsFrames = [],\n    videoKeyFrames = [],\n    oldExtraData;\n\n  AudioSegmentStream.prototype.init.call(this);\n\n  this.push = function(data) {\n    collectTimelineInfo(track, data);\n\n    if (track) {\n      track.audioobjecttype = data.audioobjecttype;\n      track.channelcount = data.channelcount;\n      track.samplerate = data.samplerate;\n      track.samplingfrequencyindex = data.samplingfrequencyindex;\n      track.samplesize = data.samplesize;\n      track.extraData = (track.audioobjecttype << 11) |\n                        (track.samplingfrequencyindex << 7) |\n                        (track.channelcount << 3);\n    }\n\n    data.pts = Math.round(data.pts / 90);\n    data.dts = Math.round(data.dts / 90);\n\n    // buffer audio data until end() is called\n    adtsFrames.push(data);\n  };\n\n  this.flush = function() {\n    var currentFrame, adtsFrame, lastMetaPts, tags = new TagList();\n    // return early if no audio data has been observed\n    if (adtsFrames.length === 0) {\n      this.trigger('done', 'AudioSegmentStream');\n      return;\n    }\n\n    lastMetaPts = -Infinity;\n\n    while (adtsFrames.length) {\n      currentFrame = adtsFrames.shift();\n\n      // write out a metadata frame at every video key frame\n      if (videoKeyFrames.length && currentFrame.pts >= videoKeyFrames[0]) {\n        lastMetaPts = videoKeyFrames.shift();\n        this.writeMetaDataTags(tags, lastMetaPts);\n      }\n\n      // also write out metadata tags every 1 second so that the decoder\n      // is re-initialized quickly after seeking into a different\n      // audio configuration.\n      if (track.extraData !== oldExtraData || currentFrame.pts - lastMetaPts >= 1000) {\n        this.writeMetaDataTags(tags, currentFrame.pts);\n        oldExtraData = track.extraData;\n        lastMetaPts = currentFrame.pts;\n      }\n\n      adtsFrame = new FlvTag(FlvTag.AUDIO_TAG);\n      adtsFrame.pts = currentFrame.pts;\n      adtsFrame.dts = currentFrame.dts;\n\n      adtsFrame.writeBytes(currentFrame.data);\n\n      tags.push(adtsFrame.finalize());\n    }\n\n    videoKeyFrames.length = 0;\n    oldExtraData = null;\n    this.trigger('data', {track: track, tags: tags.list});\n\n    this.trigger('done', 'AudioSegmentStream');\n  };\n\n  this.writeMetaDataTags = function(tags, pts) {\n    var adtsFrame;\n\n    adtsFrame = new FlvTag(FlvTag.METADATA_TAG);\n    // For audio, DTS is always the same as PTS. We want to set the DTS\n    // however so we can compare with video DTS to determine approximate\n    // packet order\n    adtsFrame.pts = pts;\n    adtsFrame.dts = pts;\n\n    // AAC is always 10\n    adtsFrame.writeMetaDataDouble('audiocodecid', 10);\n    adtsFrame.writeMetaDataBoolean('stereo', track.channelcount === 2);\n    adtsFrame.writeMetaDataDouble('audiosamplerate', track.samplerate);\n    // Is AAC always 16 bit?\n    adtsFrame.writeMetaDataDouble('audiosamplesize', 16);\n\n    tags.push(adtsFrame.finalize());\n\n    adtsFrame = new FlvTag(FlvTag.AUDIO_TAG, true);\n    // For audio, DTS is always the same as PTS. We want to set the DTS\n    // however so we can compare with video DTS to determine approximate\n    // packet order\n    adtsFrame.pts = pts;\n    adtsFrame.dts = pts;\n\n    adtsFrame.view.setUint16(adtsFrame.position, track.extraData);\n    adtsFrame.position += 2;\n    adtsFrame.length = Math.max(adtsFrame.length, adtsFrame.position);\n\n    tags.push(adtsFrame.finalize());\n  };\n\n  this.onVideoKeyFrame = function(pts) {\n    videoKeyFrames.push(pts);\n  };\n};\nAudioSegmentStream.prototype = new Stream();\n\n/**\n * Store FlvTags for the h264 stream\n * @param track {object} track metadata configuration\n */\nVideoSegmentStream = function(track) {\n  var\n    nalUnits = [],\n    config,\n    h264Frame;\n  VideoSegmentStream.prototype.init.call(this);\n\n  this.finishFrame = function(tags, frame) {\n    if (!frame) {\n      return;\n    }\n    // Check if keyframe and the length of tags.\n    // This makes sure we write metadata on the first frame of a segment.\n    if (config && track && track.newMetadata &&\n        (frame.keyFrame || tags.length === 0)) {\n      // Push extra data on every IDR frame in case we did a stream change + seek\n      var metaTag = metaDataTag(config, frame.dts).finalize();\n      var extraTag = extraDataTag(track, frame.dts).finalize();\n\n      metaTag.metaDataTag = extraTag.metaDataTag = true;\n\n      tags.push(metaTag);\n      tags.push(extraTag);\n      track.newMetadata = false;\n\n      this.trigger('keyframe', frame.dts);\n    }\n\n    frame.endNalUnit();\n    tags.push(frame.finalize());\n    h264Frame = null;\n  };\n\n  this.push = function(data) {\n    collectTimelineInfo(track, data);\n\n    data.pts = Math.round(data.pts / 90);\n    data.dts = Math.round(data.dts / 90);\n\n    // buffer video until flush() is called\n    nalUnits.push(data);\n  };\n\n  this.flush = function() {\n    var\n      currentNal,\n      tags = new TagList();\n\n    // Throw away nalUnits at the start of the byte stream until we find\n    // the first AUD\n    while (nalUnits.length) {\n      if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n        break;\n      }\n      nalUnits.shift();\n    }\n\n    // return early if no video data has been observed\n    if (nalUnits.length === 0) {\n      this.trigger('done', 'VideoSegmentStream');\n      return;\n    }\n\n    while (nalUnits.length) {\n      currentNal = nalUnits.shift();\n\n      // record the track config\n      if (currentNal.nalUnitType === 'seq_parameter_set_rbsp') {\n        track.newMetadata = true;\n        config = currentNal.config;\n        track.width = config.width;\n        track.height = config.height;\n        track.sps = [currentNal.data];\n        track.profileIdc = config.profileIdc;\n        track.levelIdc = config.levelIdc;\n        track.profileCompatibility = config.profileCompatibility;\n        h264Frame.endNalUnit();\n      } else if (currentNal.nalUnitType === 'pic_parameter_set_rbsp') {\n        track.newMetadata = true;\n        track.pps = [currentNal.data];\n        h264Frame.endNalUnit();\n      } else if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n        if (h264Frame) {\n          this.finishFrame(tags, h264Frame);\n        }\n        h264Frame = new FlvTag(FlvTag.VIDEO_TAG);\n        h264Frame.pts = currentNal.pts;\n        h264Frame.dts = currentNal.dts;\n      } else {\n        if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n          // the current sample is a key frame\n          h264Frame.keyFrame = true;\n        }\n        h264Frame.endNalUnit();\n      }\n      h264Frame.startNalUnit();\n      h264Frame.writeBytes(currentNal.data);\n    }\n    if (h264Frame) {\n      this.finishFrame(tags, h264Frame);\n    }\n\n    this.trigger('data', {track: track, tags: tags.list});\n\n    // Continue with the flush process now\n    this.trigger('done', 'VideoSegmentStream');\n  };\n};\n\nVideoSegmentStream.prototype = new Stream();\n\n/**\n * An object that incrementally transmuxes MPEG2 Trasport Stream\n * chunks into an FLV.\n */\nTransmuxer = function(options) {\n  var\n    self = this,\n\n    packetStream, parseStream, elementaryStream,\n    videoTimestampRolloverStream, audioTimestampRolloverStream,\n    timedMetadataTimestampRolloverStream,\n    adtsStream, h264Stream,\n    videoSegmentStream, audioSegmentStream, captionStream,\n    coalesceStream;\n\n  Transmuxer.prototype.init.call(this);\n\n  options = options || {};\n\n  // expose the metadata stream\n  this.metadataStream = new m2ts.MetadataStream();\n\n  options.metadataStream = this.metadataStream;\n\n  // set up the parsing pipeline\n  packetStream = new m2ts.TransportPacketStream();\n  parseStream = new m2ts.TransportParseStream();\n  elementaryStream = new m2ts.ElementaryStream();\n  videoTimestampRolloverStream = new m2ts.TimestampRolloverStream('video');\n  audioTimestampRolloverStream = new m2ts.TimestampRolloverStream('audio');\n  timedMetadataTimestampRolloverStream = new m2ts.TimestampRolloverStream('timed-metadata');\n\n  adtsStream = new AdtsStream();\n  h264Stream = new H264Stream();\n  coalesceStream = new CoalesceStream(options);\n\n  // disassemble MPEG2-TS packets into elementary streams\n  packetStream\n    .pipe(parseStream)\n    .pipe(elementaryStream);\n\n  // !!THIS ORDER IS IMPORTANT!!\n  // demux the streams\n  elementaryStream\n    .pipe(videoTimestampRolloverStream)\n    .pipe(h264Stream);\n  elementaryStream\n    .pipe(audioTimestampRolloverStream)\n    .pipe(adtsStream);\n\n  elementaryStream\n    .pipe(timedMetadataTimestampRolloverStream)\n    .pipe(this.metadataStream)\n    .pipe(coalesceStream);\n  // if CEA-708 parsing is available, hook up a caption stream\n  captionStream = new m2ts.CaptionStream();\n  h264Stream.pipe(captionStream)\n    .pipe(coalesceStream);\n\n  // hook up the segment streams once track metadata is delivered\n  elementaryStream.on('data', function(data) {\n    var i, videoTrack, audioTrack;\n\n    if (data.type === 'metadata') {\n      i = data.tracks.length;\n\n      // scan the tracks listed in the metadata\n      while (i--) {\n        if (data.tracks[i].type === 'video') {\n          videoTrack = data.tracks[i];\n        } else if (data.tracks[i].type === 'audio') {\n          audioTrack = data.tracks[i];\n        }\n      }\n\n      // hook up the video segment stream to the first track with h264 data\n      if (videoTrack && !videoSegmentStream) {\n        coalesceStream.numberOfTracks++;\n        videoSegmentStream = new VideoSegmentStream(videoTrack);\n\n        // Set up the final part of the video pipeline\n        h264Stream\n          .pipe(videoSegmentStream)\n          .pipe(coalesceStream);\n      }\n\n      if (audioTrack && !audioSegmentStream) {\n        // hook up the audio segment stream to the first track with aac data\n        coalesceStream.numberOfTracks++;\n        audioSegmentStream = new AudioSegmentStream(audioTrack);\n\n        // Set up the final part of the audio pipeline\n        adtsStream\n          .pipe(audioSegmentStream)\n          .pipe(coalesceStream);\n\n        if (videoSegmentStream) {\n          videoSegmentStream.on('keyframe', audioSegmentStream.onVideoKeyFrame);\n        }\n      }\n    }\n  });\n\n  // feed incoming data to the front of the parsing pipeline\n  this.push = function(data) {\n    packetStream.push(data);\n  };\n\n  // flush any buffered data\n  this.flush = function() {\n    // Start at the top of the pipeline and flush all pending work\n    packetStream.flush();\n  };\n\n  // Caption data has to be reset when seeking outside buffered range\n  this.resetCaptions = function() {\n    captionStream.reset();\n  };\n\n  // Re-emit any data coming from the coalesce stream to the outside world\n  coalesceStream.on('data', function(event) {\n    self.trigger('data', event);\n  });\n\n  // Let the consumer know we have finished flushing the entire pipeline\n  coalesceStream.on('done', function() {\n    self.trigger('done');\n  });\n};\nTransmuxer.prototype = new Stream();\n\n// forward compatibility\nmodule.exports = Transmuxer;\n","function incr32 (iv) {\n  var len = iv.length\n  var item\n  while (len--) {\n    item = iv.readUInt8(len)\n    if (item === 255) {\n      iv.writeUInt8(0, len)\n    } else {\n      item++\n      iv.writeUInt8(item, len)\n      break\n    }\n  }\n}\nmodule.exports = incr32\n","var win;\n\nif (typeof window !== \"undefined\") {\n    win = window;\n} else if (typeof global !== \"undefined\") {\n    win = global;\n} else if (typeof self !== \"undefined\"){\n    win = self;\n} else {\n    win = {};\n}\n\nmodule.exports = win;\n","// Defaults\nvar defaultOptions = {\n\tformat: 'image/png',\n\tquality: 0.92,\n\twidth: undefined,\n\theight: undefined,\n\tCanvas: undefined,\n\tcrossOrigin: undefined\n};\n\n// Return Promise\nvar mergeImages = function (sources, options) {\n\tif ( sources === void 0 ) sources = [];\n\tif ( options === void 0 ) options = {};\n\n\treturn new Promise(function (resolve) {\n\toptions = Object.assign({}, defaultOptions, options);\n\n\t// Setup browser/Node.js specific variables\n\tvar canvas = options.Canvas ? new options.Canvas() : window.document.createElement('canvas');\n\tvar Image = options.Image || window.Image;\n\n\t// Load sources\n\tvar images = sources.map(function (source) { return new Promise(function (resolve, reject) {\n\t\t// Convert sources to objects\n\t\tif (source.constructor.name !== 'Object') {\n\t\t\tsource = { src: source };\n\t\t}\n\n\t\t// Resolve source and img when loaded\n\t\tvar img = new Image();\n\t\timg.crossOrigin = options.crossOrigin;\n\t\timg.onerror = function () { return reject(new Error('Couldn\\'t load image')); };\n\t\timg.onload = function () { return resolve(Object.assign({}, source, { img: img })); };\n\t\timg.src = source.src;\n\t}); });\n\n\t// Get canvas context\n\tvar ctx = canvas.getContext('2d');\n\n\t// When sources have loaded\n\tresolve(Promise.all(images)\n\t\t.then(function (images) {\n\t\t\t// Set canvas dimensions\n\t\t\tvar getSize = function (dim) { return options[dim] || Math.max.apply(Math, images.map(function (image) { return image.img[dim]; })); };\n\t\t\tcanvas.width = getSize('width');\n\t\t\tcanvas.height = getSize('height');\n\n\t\t\t// Draw images to canvas\n\t\t\timages.forEach(function (image) {\n\t\t\t\tctx.globalAlpha = image.opacity ? image.opacity : 1;\n\t\t\t\treturn ctx.drawImage(image.img, image.x || 0, image.y || 0);\n\t\t\t});\n\n\t\t\tif (options.Canvas && options.format === 'image/jpeg') {\n\t\t\t\t// Resolve data URI for node-canvas jpeg async\n\t\t\t\treturn new Promise(function (resolve, reject) {\n\t\t\t\t\tcanvas.toDataURL(options.format, {\n\t\t\t\t\t\tquality: options.quality,\n\t\t\t\t\t\tprogressive: false\n\t\t\t\t\t}, function (err, jpeg) {\n\t\t\t\t\t\tif (err) {\n\t\t\t\t\t\t\treject(err);\n\t\t\t\t\t\t\treturn;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tresolve(jpeg);\n\t\t\t\t\t});\n\t\t\t\t});\n\t\t\t}\n\n\t\t\t// Resolve all other data URIs sync\n\t\t\treturn canvas.toDataURL(options.format, options.quality);\n\t\t}));\n});\n};\n\nexport default mergeImages;\n//# sourceMappingURL=index.es2015.js.map\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n// Default exports for Node. Export the extended versions of VTTCue and\n// VTTRegion in Node since we likely want the capability to convert back and\n// forth between JSON. If we don't then it's not that big of a deal since we're\n// off browser.\n\nvar window = require('global/window');\n\nvar vttjs = module.exports = {\n  WebVTT: require(\"./vtt.js\"),\n  VTTCue: require(\"./vttcue.js\"),\n  VTTRegion: require(\"./vttregion.js\")\n};\n\nwindow.vttjs = vttjs;\nwindow.WebVTT = vttjs.WebVTT;\n\nvar cueShim = vttjs.VTTCue;\nvar regionShim = vttjs.VTTRegion;\nvar nativeVTTCue = window.VTTCue;\nvar nativeVTTRegion = window.VTTRegion;\n\nvttjs.shim = function() {\n  window.VTTCue = cueShim;\n  window.VTTRegion = regionShim;\n};\n\nvttjs.restore = function() {\n  window.VTTCue = nativeVTTCue;\n  window.VTTRegion = nativeVTTRegion;\n};\n\nif (!window.VTTCue) {\n  vttjs.shim();\n}\n","var isObject = require('../internals/is-object');\n\n// `ToPrimitive` abstract operation\n// https://tc39.es/ecma262/#sec-toprimitive\n// instead of the ES6 spec version, we didn't implement @@toPrimitive case\n// and the second argument - flag - preferred type is a string\nmodule.exports = function (input, PREFERRED_STRING) {\n  if (!isObject(input)) return input;\n  var fn, val;\n  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;\n  if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;\n  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;\n  throw TypeError(\"Can't convert object to primitive value\");\n};\n","var xor = require('buffer-xor')\n\nexports.encrypt = function (self, block) {\n  var data = xor(block, self._prev)\n\n  self._prev = self._cipher.encryptBlock(data)\n  return self._prev\n}\n\nexports.decrypt = function (self, block) {\n  var pad = self._prev\n\n  self._prev = block\n  var out = self._cipher.decryptBlock(block)\n\n  return xor(out, pad)\n}\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./evpkdf\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./enc-base64\", \"./md5\", \"./evpkdf\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var BlockCipher = C_lib.BlockCipher;\n\t    var C_algo = C.algo;\n\n\t    // Lookup tables\n\t    var SBOX = [];\n\t    var INV_SBOX = [];\n\t    var SUB_MIX_0 = [];\n\t    var SUB_MIX_1 = [];\n\t    var SUB_MIX_2 = [];\n\t    var SUB_MIX_3 = [];\n\t    var INV_SUB_MIX_0 = [];\n\t    var INV_SUB_MIX_1 = [];\n\t    var INV_SUB_MIX_2 = [];\n\t    var INV_SUB_MIX_3 = [];\n\n\t    // Compute lookup tables\n\t    (function () {\n\t        // Compute double table\n\t        var d = [];\n\t        for (var i = 0; i < 256; i++) {\n\t            if (i < 128) {\n\t                d[i] = i << 1;\n\t            } else {\n\t                d[i] = (i << 1) ^ 0x11b;\n\t            }\n\t        }\n\n\t        // Walk GF(2^8)\n\t        var x = 0;\n\t        var xi = 0;\n\t        for (var i = 0; i < 256; i++) {\n\t            // Compute sbox\n\t            var sx = xi ^ (xi << 1) ^ (xi << 2) ^ (xi << 3) ^ (xi << 4);\n\t            sx = (sx >>> 8) ^ (sx & 0xff) ^ 0x63;\n\t            SBOX[x] = sx;\n\t            INV_SBOX[sx] = x;\n\n\t            // Compute multiplication\n\t            var x2 = d[x];\n\t            var x4 = d[x2];\n\t            var x8 = d[x4];\n\n\t            // Compute sub bytes, mix columns tables\n\t            var t = (d[sx] * 0x101) ^ (sx * 0x1010100);\n\t            SUB_MIX_0[x] = (t << 24) | (t >>> 8);\n\t            SUB_MIX_1[x] = (t << 16) | (t >>> 16);\n\t            SUB_MIX_2[x] = (t << 8)  | (t >>> 24);\n\t            SUB_MIX_3[x] = t;\n\n\t            // Compute inv sub bytes, inv mix columns tables\n\t            var t = (x8 * 0x1010101) ^ (x4 * 0x10001) ^ (x2 * 0x101) ^ (x * 0x1010100);\n\t            INV_SUB_MIX_0[sx] = (t << 24) | (t >>> 8);\n\t            INV_SUB_MIX_1[sx] = (t << 16) | (t >>> 16);\n\t            INV_SUB_MIX_2[sx] = (t << 8)  | (t >>> 24);\n\t            INV_SUB_MIX_3[sx] = t;\n\n\t            // Compute next counter\n\t            if (!x) {\n\t                x = xi = 1;\n\t            } else {\n\t                x = x2 ^ d[d[d[x8 ^ x2]]];\n\t                xi ^= d[d[xi]];\n\t            }\n\t        }\n\t    }());\n\n\t    // Precomputed Rcon lookup\n\t    var RCON = [0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36];\n\n\t    /**\n\t     * AES block cipher algorithm.\n\t     */\n\t    var AES = C_algo.AES = BlockCipher.extend({\n\t        _doReset: function () {\n\t            var t;\n\n\t            // Skip reset of nRounds has been set before and key did not change\n\t            if (this._nRounds && this._keyPriorReset === this._key) {\n\t                return;\n\t            }\n\n\t            // Shortcuts\n\t            var key = this._keyPriorReset = this._key;\n\t            var keyWords = key.words;\n\t            var keySize = key.sigBytes / 4;\n\n\t            // Compute number of rounds\n\t            var nRounds = this._nRounds = keySize + 6;\n\n\t            // Compute number of key schedule rows\n\t            var ksRows = (nRounds + 1) * 4;\n\n\t            // Compute key schedule\n\t            var keySchedule = this._keySchedule = [];\n\t            for (var ksRow = 0; ksRow < ksRows; ksRow++) {\n\t                if (ksRow < keySize) {\n\t                    keySchedule[ksRow] = keyWords[ksRow];\n\t                } else {\n\t                    t = keySchedule[ksRow - 1];\n\n\t                    if (!(ksRow % keySize)) {\n\t                        // Rot word\n\t                        t = (t << 8) | (t >>> 24);\n\n\t                        // Sub word\n\t                        t = (SBOX[t >>> 24] << 24) | (SBOX[(t >>> 16) & 0xff] << 16) | (SBOX[(t >>> 8) & 0xff] << 8) | SBOX[t & 0xff];\n\n\t                        // Mix Rcon\n\t                        t ^= RCON[(ksRow / keySize) | 0] << 24;\n\t                    } else if (keySize > 6 && ksRow % keySize == 4) {\n\t                        // Sub word\n\t                        t = (SBOX[t >>> 24] << 24) | (SBOX[(t >>> 16) & 0xff] << 16) | (SBOX[(t >>> 8) & 0xff] << 8) | SBOX[t & 0xff];\n\t                    }\n\n\t                    keySchedule[ksRow] = keySchedule[ksRow - keySize] ^ t;\n\t                }\n\t            }\n\n\t            // Compute inv key schedule\n\t            var invKeySchedule = this._invKeySchedule = [];\n\t            for (var invKsRow = 0; invKsRow < ksRows; invKsRow++) {\n\t                var ksRow = ksRows - invKsRow;\n\n\t                if (invKsRow % 4) {\n\t                    var t = keySchedule[ksRow];\n\t                } else {\n\t                    var t = keySchedule[ksRow - 4];\n\t                }\n\n\t                if (invKsRow < 4 || ksRow <= 4) {\n\t                    invKeySchedule[invKsRow] = t;\n\t                } else {\n\t                    invKeySchedule[invKsRow] = INV_SUB_MIX_0[SBOX[t >>> 24]] ^ INV_SUB_MIX_1[SBOX[(t >>> 16) & 0xff]] ^\n\t                                               INV_SUB_MIX_2[SBOX[(t >>> 8) & 0xff]] ^ INV_SUB_MIX_3[SBOX[t & 0xff]];\n\t                }\n\t            }\n\t        },\n\n\t        encryptBlock: function (M, offset) {\n\t            this._doCryptBlock(M, offset, this._keySchedule, SUB_MIX_0, SUB_MIX_1, SUB_MIX_2, SUB_MIX_3, SBOX);\n\t        },\n\n\t        decryptBlock: function (M, offset) {\n\t            // Swap 2nd and 4th rows\n\t            var t = M[offset + 1];\n\t            M[offset + 1] = M[offset + 3];\n\t            M[offset + 3] = t;\n\n\t            this._doCryptBlock(M, offset, this._invKeySchedule, INV_SUB_MIX_0, INV_SUB_MIX_1, INV_SUB_MIX_2, INV_SUB_MIX_3, INV_SBOX);\n\n\t            // Inv swap 2nd and 4th rows\n\t            var t = M[offset + 1];\n\t            M[offset + 1] = M[offset + 3];\n\t            M[offset + 3] = t;\n\t        },\n\n\t        _doCryptBlock: function (M, offset, keySchedule, SUB_MIX_0, SUB_MIX_1, SUB_MIX_2, SUB_MIX_3, SBOX) {\n\t            // Shortcut\n\t            var nRounds = this._nRounds;\n\n\t            // Get input, add round key\n\t            var s0 = M[offset]     ^ keySchedule[0];\n\t            var s1 = M[offset + 1] ^ keySchedule[1];\n\t            var s2 = M[offset + 2] ^ keySchedule[2];\n\t            var s3 = M[offset + 3] ^ keySchedule[3];\n\n\t            // Key schedule row counter\n\t            var ksRow = 4;\n\n\t            // Rounds\n\t            for (var round = 1; round < nRounds; round++) {\n\t                // Shift rows, sub bytes, mix columns, add round key\n\t                var t0 = SUB_MIX_0[s0 >>> 24] ^ SUB_MIX_1[(s1 >>> 16) & 0xff] ^ SUB_MIX_2[(s2 >>> 8) & 0xff] ^ SUB_MIX_3[s3 & 0xff] ^ keySchedule[ksRow++];\n\t                var t1 = SUB_MIX_0[s1 >>> 24] ^ SUB_MIX_1[(s2 >>> 16) & 0xff] ^ SUB_MIX_2[(s3 >>> 8) & 0xff] ^ SUB_MIX_3[s0 & 0xff] ^ keySchedule[ksRow++];\n\t                var t2 = SUB_MIX_0[s2 >>> 24] ^ SUB_MIX_1[(s3 >>> 16) & 0xff] ^ SUB_MIX_2[(s0 >>> 8) & 0xff] ^ SUB_MIX_3[s1 & 0xff] ^ keySchedule[ksRow++];\n\t                var t3 = SUB_MIX_0[s3 >>> 24] ^ SUB_MIX_1[(s0 >>> 16) & 0xff] ^ SUB_MIX_2[(s1 >>> 8) & 0xff] ^ SUB_MIX_3[s2 & 0xff] ^ keySchedule[ksRow++];\n\n\t                // Update state\n\t                s0 = t0;\n\t                s1 = t1;\n\t                s2 = t2;\n\t                s3 = t3;\n\t            }\n\n\t            // Shift rows, sub bytes, add round key\n\t            var t0 = ((SBOX[s0 >>> 24] << 24) | (SBOX[(s1 >>> 16) & 0xff] << 16) | (SBOX[(s2 >>> 8) & 0xff] << 8) | SBOX[s3 & 0xff]) ^ keySchedule[ksRow++];\n\t            var t1 = ((SBOX[s1 >>> 24] << 24) | (SBOX[(s2 >>> 16) & 0xff] << 16) | (SBOX[(s3 >>> 8) & 0xff] << 8) | SBOX[s0 & 0xff]) ^ keySchedule[ksRow++];\n\t            var t2 = ((SBOX[s2 >>> 24] << 24) | (SBOX[(s3 >>> 16) & 0xff] << 16) | (SBOX[(s0 >>> 8) & 0xff] << 8) | SBOX[s1 & 0xff]) ^ keySchedule[ksRow++];\n\t            var t3 = ((SBOX[s3 >>> 24] << 24) | (SBOX[(s0 >>> 16) & 0xff] << 16) | (SBOX[(s1 >>> 8) & 0xff] << 8) | SBOX[s2 & 0xff]) ^ keySchedule[ksRow++];\n\n\t            // Set output\n\t            M[offset]     = t0;\n\t            M[offset + 1] = t1;\n\t            M[offset + 2] = t2;\n\t            M[offset + 3] = t3;\n\t        },\n\n\t        keySize: 256/32\n\t    });\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.AES.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.AES.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.AES = BlockCipher._createHelper(AES);\n\t}());\n\n\n\treturn CryptoJS.AES;\n\n}));","module.exports = require('./readable').PassThrough\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./evpkdf\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./enc-base64\", \"./md5\", \"./evpkdf\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var StreamCipher = C_lib.StreamCipher;\n\t    var C_algo = C.algo;\n\n\t    /**\n\t     * RC4 stream cipher algorithm.\n\t     */\n\t    var RC4 = C_algo.RC4 = StreamCipher.extend({\n\t        _doReset: function () {\n\t            // Shortcuts\n\t            var key = this._key;\n\t            var keyWords = key.words;\n\t            var keySigBytes = key.sigBytes;\n\n\t            // Init sbox\n\t            var S = this._S = [];\n\t            for (var i = 0; i < 256; i++) {\n\t                S[i] = i;\n\t            }\n\n\t            // Key setup\n\t            for (var i = 0, j = 0; i < 256; i++) {\n\t                var keyByteIndex = i % keySigBytes;\n\t                var keyByte = (keyWords[keyByteIndex >>> 2] >>> (24 - (keyByteIndex % 4) * 8)) & 0xff;\n\n\t                j = (j + S[i] + keyByte) % 256;\n\n\t                // Swap\n\t                var t = S[i];\n\t                S[i] = S[j];\n\t                S[j] = t;\n\t            }\n\n\t            // Counters\n\t            this._i = this._j = 0;\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            M[offset] ^= generateKeystreamWord.call(this);\n\t        },\n\n\t        keySize: 256/32,\n\n\t        ivSize: 0\n\t    });\n\n\t    function generateKeystreamWord() {\n\t        // Shortcuts\n\t        var S = this._S;\n\t        var i = this._i;\n\t        var j = this._j;\n\n\t        // Generate keystream word\n\t        var keystreamWord = 0;\n\t        for (var n = 0; n < 4; n++) {\n\t            i = (i + 1) % 256;\n\t            j = (j + S[i]) % 256;\n\n\t            // Swap\n\t            var t = S[i];\n\t            S[i] = S[j];\n\t            S[j] = t;\n\n\t            keystreamWord |= S[(S[i] + S[j]) % 256] << (24 - n * 8);\n\t        }\n\n\t        // Update counters\n\t        this._i = i;\n\t        this._j = j;\n\n\t        return keystreamWord;\n\t    }\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.RC4.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.RC4.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.RC4 = StreamCipher._createHelper(RC4);\n\n\t    /**\n\t     * Modified RC4 stream cipher algorithm.\n\t     */\n\t    var RC4Drop = C_algo.RC4Drop = RC4.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {number} drop The number of keystream words to drop. Default 192\n\t         */\n\t        cfg: RC4.cfg.extend({\n\t            drop: 192\n\t        }),\n\n\t        _doReset: function () {\n\t            RC4._doReset.call(this);\n\n\t            // Drop\n\t            for (var i = this.cfg.drop; i > 0; i--) {\n\t                generateKeystreamWord.call(this);\n\t            }\n\t        }\n\t    });\n\n\t    /**\n\t     * Shortcut functions to the cipher's object interface.\n\t     *\n\t     * @example\n\t     *\n\t     *     var ciphertext = CryptoJS.RC4Drop.encrypt(message, key, cfg);\n\t     *     var plaintext  = CryptoJS.RC4Drop.decrypt(ciphertext, key, cfg);\n\t     */\n\t    C.RC4Drop = StreamCipher._createHelper(RC4Drop);\n\t}());\n\n\n\treturn CryptoJS.RC4;\n\n}));","'use strict';\n\nvar assert = require('minimalistic-assert');\nvar inherits = require('inherits');\n\nexports.inherits = inherits;\n\nfunction isSurrogatePair(msg, i) {\n  if ((msg.charCodeAt(i) & 0xFC00) !== 0xD800) {\n    return false;\n  }\n  if (i < 0 || i + 1 >= msg.length) {\n    return false;\n  }\n  return (msg.charCodeAt(i + 1) & 0xFC00) === 0xDC00;\n}\n\nfunction toArray(msg, enc) {\n  if (Array.isArray(msg))\n    return msg.slice();\n  if (!msg)\n    return [];\n  var res = [];\n  if (typeof msg === 'string') {\n    if (!enc) {\n      // Inspired by stringToUtf8ByteArray() in closure-library by Google\n      // https://github.com/google/closure-library/blob/8598d87242af59aac233270742c8984e2b2bdbe0/closure/goog/crypt/crypt.js#L117-L143\n      // Apache License 2.0\n      // https://github.com/google/closure-library/blob/master/LICENSE\n      var p = 0;\n      for (var i = 0; i < msg.length; i++) {\n        var c = msg.charCodeAt(i);\n        if (c < 128) {\n          res[p++] = c;\n        } else if (c < 2048) {\n          res[p++] = (c >> 6) | 192;\n          res[p++] = (c & 63) | 128;\n        } else if (isSurrogatePair(msg, i)) {\n          c = 0x10000 + ((c & 0x03FF) << 10) + (msg.charCodeAt(++i) & 0x03FF);\n          res[p++] = (c >> 18) | 240;\n          res[p++] = ((c >> 12) & 63) | 128;\n          res[p++] = ((c >> 6) & 63) | 128;\n          res[p++] = (c & 63) | 128;\n        } else {\n          res[p++] = (c >> 12) | 224;\n          res[p++] = ((c >> 6) & 63) | 128;\n          res[p++] = (c & 63) | 128;\n        }\n      }\n    } else if (enc === 'hex') {\n      msg = msg.replace(/[^a-z0-9]+/ig, '');\n      if (msg.length % 2 !== 0)\n        msg = '0' + msg;\n      for (i = 0; i < msg.length; i += 2)\n        res.push(parseInt(msg[i] + msg[i + 1], 16));\n    }\n  } else {\n    for (i = 0; i < msg.length; i++)\n      res[i] = msg[i] | 0;\n  }\n  return res;\n}\nexports.toArray = toArray;\n\nfunction toHex(msg) {\n  var res = '';\n  for (var i = 0; i < msg.length; i++)\n    res += zero2(msg[i].toString(16));\n  return res;\n}\nexports.toHex = toHex;\n\nfunction htonl(w) {\n  var res = (w >>> 24) |\n            ((w >>> 8) & 0xff00) |\n            ((w << 8) & 0xff0000) |\n            ((w & 0xff) << 24);\n  return res >>> 0;\n}\nexports.htonl = htonl;\n\nfunction toHex32(msg, endian) {\n  var res = '';\n  for (var i = 0; i < msg.length; i++) {\n    var w = msg[i];\n    if (endian === 'little')\n      w = htonl(w);\n    res += zero8(w.toString(16));\n  }\n  return res;\n}\nexports.toHex32 = toHex32;\n\nfunction zero2(word) {\n  if (word.length === 1)\n    return '0' + word;\n  else\n    return word;\n}\nexports.zero2 = zero2;\n\nfunction zero8(word) {\n  if (word.length === 7)\n    return '0' + word;\n  else if (word.length === 6)\n    return '00' + word;\n  else if (word.length === 5)\n    return '000' + word;\n  else if (word.length === 4)\n    return '0000' + word;\n  else if (word.length === 3)\n    return '00000' + word;\n  else if (word.length === 2)\n    return '000000' + word;\n  else if (word.length === 1)\n    return '0000000' + word;\n  else\n    return word;\n}\nexports.zero8 = zero8;\n\nfunction join32(msg, start, end, endian) {\n  var len = end - start;\n  assert(len % 4 === 0);\n  var res = new Array(len / 4);\n  for (var i = 0, k = start; i < res.length; i++, k += 4) {\n    var w;\n    if (endian === 'big')\n      w = (msg[k] << 24) | (msg[k + 1] << 16) | (msg[k + 2] << 8) | msg[k + 3];\n    else\n      w = (msg[k + 3] << 24) | (msg[k + 2] << 16) | (msg[k + 1] << 8) | msg[k];\n    res[i] = w >>> 0;\n  }\n  return res;\n}\nexports.join32 = join32;\n\nfunction split32(msg, endian) {\n  var res = new Array(msg.length * 4);\n  for (var i = 0, k = 0; i < msg.length; i++, k += 4) {\n    var m = msg[i];\n    if (endian === 'big') {\n      res[k] = m >>> 24;\n      res[k + 1] = (m >>> 16) & 0xff;\n      res[k + 2] = (m >>> 8) & 0xff;\n      res[k + 3] = m & 0xff;\n    } else {\n      res[k + 3] = m >>> 24;\n      res[k + 2] = (m >>> 16) & 0xff;\n      res[k + 1] = (m >>> 8) & 0xff;\n      res[k] = m & 0xff;\n    }\n  }\n  return res;\n}\nexports.split32 = split32;\n\nfunction rotr32(w, b) {\n  return (w >>> b) | (w << (32 - b));\n}\nexports.rotr32 = rotr32;\n\nfunction rotl32(w, b) {\n  return (w << b) | (w >>> (32 - b));\n}\nexports.rotl32 = rotl32;\n\nfunction sum32(a, b) {\n  return (a + b) >>> 0;\n}\nexports.sum32 = sum32;\n\nfunction sum32_3(a, b, c) {\n  return (a + b + c) >>> 0;\n}\nexports.sum32_3 = sum32_3;\n\nfunction sum32_4(a, b, c, d) {\n  return (a + b + c + d) >>> 0;\n}\nexports.sum32_4 = sum32_4;\n\nfunction sum32_5(a, b, c, d, e) {\n  return (a + b + c + d + e) >>> 0;\n}\nexports.sum32_5 = sum32_5;\n\nfunction sum64(buf, pos, ah, al) {\n  var bh = buf[pos];\n  var bl = buf[pos + 1];\n\n  var lo = (al + bl) >>> 0;\n  var hi = (lo < al ? 1 : 0) + ah + bh;\n  buf[pos] = hi >>> 0;\n  buf[pos + 1] = lo;\n}\nexports.sum64 = sum64;\n\nfunction sum64_hi(ah, al, bh, bl) {\n  var lo = (al + bl) >>> 0;\n  var hi = (lo < al ? 1 : 0) + ah + bh;\n  return hi >>> 0;\n}\nexports.sum64_hi = sum64_hi;\n\nfunction sum64_lo(ah, al, bh, bl) {\n  var lo = al + bl;\n  return lo >>> 0;\n}\nexports.sum64_lo = sum64_lo;\n\nfunction sum64_4_hi(ah, al, bh, bl, ch, cl, dh, dl) {\n  var carry = 0;\n  var lo = al;\n  lo = (lo + bl) >>> 0;\n  carry += lo < al ? 1 : 0;\n  lo = (lo + cl) >>> 0;\n  carry += lo < cl ? 1 : 0;\n  lo = (lo + dl) >>> 0;\n  carry += lo < dl ? 1 : 0;\n\n  var hi = ah + bh + ch + dh + carry;\n  return hi >>> 0;\n}\nexports.sum64_4_hi = sum64_4_hi;\n\nfunction sum64_4_lo(ah, al, bh, bl, ch, cl, dh, dl) {\n  var lo = al + bl + cl + dl;\n  return lo >>> 0;\n}\nexports.sum64_4_lo = sum64_4_lo;\n\nfunction sum64_5_hi(ah, al, bh, bl, ch, cl, dh, dl, eh, el) {\n  var carry = 0;\n  var lo = al;\n  lo = (lo + bl) >>> 0;\n  carry += lo < al ? 1 : 0;\n  lo = (lo + cl) >>> 0;\n  carry += lo < cl ? 1 : 0;\n  lo = (lo + dl) >>> 0;\n  carry += lo < dl ? 1 : 0;\n  lo = (lo + el) >>> 0;\n  carry += lo < el ? 1 : 0;\n\n  var hi = ah + bh + ch + dh + eh + carry;\n  return hi >>> 0;\n}\nexports.sum64_5_hi = sum64_5_hi;\n\nfunction sum64_5_lo(ah, al, bh, bl, ch, cl, dh, dl, eh, el) {\n  var lo = al + bl + cl + dl + el;\n\n  return lo >>> 0;\n}\nexports.sum64_5_lo = sum64_5_lo;\n\nfunction rotr64_hi(ah, al, num) {\n  var r = (al << (32 - num)) | (ah >>> num);\n  return r >>> 0;\n}\nexports.rotr64_hi = rotr64_hi;\n\nfunction rotr64_lo(ah, al, num) {\n  var r = (ah << (32 - num)) | (al >>> num);\n  return r >>> 0;\n}\nexports.rotr64_lo = rotr64_lo;\n\nfunction shr64_hi(ah, al, num) {\n  return ah >>> num;\n}\nexports.shr64_hi = shr64_hi;\n\nfunction shr64_lo(ah, al, num) {\n  var r = (ah << (32 - num)) | (al >>> num);\n  return r >>> 0;\n}\nexports.shr64_lo = shr64_lo;\n","module.exports = false;\n","'use strict';\n\nvar FlvTag = require('./flv-tag.js');\n\n// For information on the FLV format, see\n// http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf.\n// Technically, this function returns the header and a metadata FLV tag\n// if duration is greater than zero\n// duration in seconds\n// @return {object} the bytes of the FLV header as a Uint8Array\nvar getFlvHeader = function(duration, audio, video) { // :ByteArray {\n  var\n    headBytes = new Uint8Array(3 + 1 + 1 + 4),\n    head = new DataView(headBytes.buffer),\n    metadata,\n    result,\n    metadataLength;\n\n  // default arguments\n  duration = duration || 0;\n  audio = audio === undefined ? true : audio;\n  video = video === undefined ? true : video;\n\n  // signature\n  head.setUint8(0, 0x46); // 'F'\n  head.setUint8(1, 0x4c); // 'L'\n  head.setUint8(2, 0x56); // 'V'\n\n  // version\n  head.setUint8(3, 0x01);\n\n  // flags\n  head.setUint8(4, (audio ? 0x04 : 0x00) | (video ? 0x01 : 0x00));\n\n  // data offset, should be 9 for FLV v1\n  head.setUint32(5, headBytes.byteLength);\n\n  // init the first FLV tag\n  if (duration <= 0) {\n    // no duration available so just write the first field of the first\n    // FLV tag\n    result = new Uint8Array(headBytes.byteLength + 4);\n    result.set(headBytes);\n    result.set([0, 0, 0, 0], headBytes.byteLength);\n    return result;\n  }\n\n  // write out the duration metadata tag\n  metadata = new FlvTag(FlvTag.METADATA_TAG);\n  metadata.pts = metadata.dts = 0;\n  metadata.writeMetaDataDouble('duration', duration);\n  metadataLength = metadata.finalize().length;\n  result = new Uint8Array(headBytes.byteLength + metadataLength);\n  result.set(headBytes);\n  result.set(head.byteLength, metadataLength);\n\n  return result;\n};\n\nmodule.exports = getFlvHeader;\n","/* eslint-disable node/no-deprecated-api */\n\n'use strict'\n\nvar buffer = require('buffer')\nvar Buffer = buffer.Buffer\n\nvar safer = {}\n\nvar key\n\nfor (key in buffer) {\n  if (!buffer.hasOwnProperty(key)) continue\n  if (key === 'SlowBuffer' || key === 'Buffer') continue\n  safer[key] = buffer[key]\n}\n\nvar Safer = safer.Buffer = {}\nfor (key in Buffer) {\n  if (!Buffer.hasOwnProperty(key)) continue\n  if (key === 'allocUnsafe' || key === 'allocUnsafeSlow') continue\n  Safer[key] = Buffer[key]\n}\n\nsafer.Buffer.prototype = Buffer.prototype\n\nif (!Safer.from || Safer.from === Uint8Array.from) {\n  Safer.from = function (value, encodingOrOffset, length) {\n    if (typeof value === 'number') {\n      throw new TypeError('The \"value\" argument must not be of type number. Received type ' + typeof value)\n    }\n    if (value && typeof value.length === 'undefined') {\n      throw new TypeError('The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type ' + typeof value)\n    }\n    return Buffer(value, encodingOrOffset, length)\n  }\n}\n\nif (!Safer.alloc) {\n  Safer.alloc = function (size, fill, encoding) {\n    if (typeof size !== 'number') {\n      throw new TypeError('The \"size\" argument must be of type number. Received type ' + typeof size)\n    }\n    if (size < 0 || size >= 2 * (1 << 30)) {\n      throw new RangeError('The value \"' + size + '\" is invalid for option \"size\"')\n    }\n    var buf = Buffer(size)\n    if (!fill || fill.length === 0) {\n      buf.fill(0)\n    } else if (typeof encoding === 'string') {\n      buf.fill(fill, encoding)\n    } else {\n      buf.fill(fill)\n    }\n    return buf\n  }\n}\n\nif (!safer.kStringMaxLength) {\n  try {\n    safer.kStringMaxLength = process.binding('buffer').kStringMaxLength\n  } catch (e) {\n    // we can't determine kStringMaxLength in environments where process.binding\n    // is unsupported, so let's not set it\n  }\n}\n\nif (!safer.constants) {\n  safer.constants = {\n    MAX_LENGTH: safer.kMaxLength\n  }\n  if (safer.kStringMaxLength) {\n    safer.constants.MAX_STRING_LENGTH = safer.kStringMaxLength\n  }\n}\n\nmodule.exports = safer\n","function _isNativeFunction(fn) {\n  return Function.toString.call(fn).indexOf(\"[native code]\") !== -1;\n}\n\nmodule.exports = _isNativeFunction;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","var toString = {}.toString;\n\nmodule.exports = function (it) {\n  return toString.call(it).slice(8, -1);\n};\n","var global = require('../internals/global');\nvar setGlobal = require('../internals/set-global');\n\nvar SHARED = '__core-js_shared__';\nvar store = global[SHARED] || setGlobal(SHARED, {});\n\nmodule.exports = store;\n","'use strict';\nvar $ = require('../internals/export');\nvar $findIndex = require('../internals/array-iteration').findIndex;\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\nvar FIND_INDEX = 'findIndex';\nvar SKIPS_HOLES = true;\n\n// Shouldn't skip holes\nif (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });\n\n// `Array.prototype.findIndex` method\n// https://tc39.es/ecma262/#sec-array.prototype.findindex\n$({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {\n  findIndex: function findIndex(callbackfn /* , that = undefined */) {\n    return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables(FIND_INDEX);\n","/**\n * @file sync-controller.js\n */\n\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x2, _x3, _x4) { var _again = true; _function: while (_again) { var object = _x2, property = _x3, receiver = _x4; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x2 = parent; _x3 = property; _x4 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _muxJsLibMp4Probe = require('mux.js/lib/mp4/probe');\n\nvar _muxJsLibMp4Probe2 = _interopRequireDefault(_muxJsLibMp4Probe);\n\nvar _muxJsLibToolsTsInspectorJs = require('mux.js/lib/tools/ts-inspector.js');\n\nvar _playlist = require('./playlist');\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar syncPointStrategies = [\n// Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n//                the equivalence display-time 0 === segment-index 0\n{\n  name: 'VOD',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (duration !== Infinity) {\n      var syncPoint = {\n        time: 0,\n        segmentIndex: 0\n      };\n\n      return syncPoint;\n    }\n    return null;\n  }\n},\n// Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n{\n  name: 'ProgramDateTime',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (syncController.datetimeToDisplayTime && playlist.dateTimeObject) {\n      var playlistTime = playlist.dateTimeObject.getTime() / 1000;\n      var playlistStart = playlistTime + syncController.datetimeToDisplayTime;\n      var syncPoint = {\n        time: playlistStart,\n        segmentIndex: 0\n      };\n\n      return syncPoint;\n    }\n    return null;\n  }\n},\n// Stategy \"Segment\": We have a known time mapping for a timeline and a\n//                    segment in the current timeline with timing data\n{\n  name: 'Segment',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var segments = playlist.segments || [];\n    var syncPoint = null;\n    var lastDistance = null;\n\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < segments.length; i++) {\n      var segment = segments[i];\n\n      if (segment.timeline === currentTimeline && typeof segment.start !== 'undefined') {\n        var distance = Math.abs(currentTime - segment.start);\n\n        // Once the distance begins to increase, we have passed\n        // currentTime and can stop looking for better candidates\n        if (lastDistance !== null && lastDistance < distance) {\n          break;\n        }\n\n        if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n          lastDistance = distance;\n          syncPoint = {\n            time: segment.start,\n            segmentIndex: i\n          };\n        }\n      }\n    }\n    return syncPoint;\n  }\n},\n// Stategy \"Discontinuity\": We have a discontinuity with a known\n//                          display-time\n{\n  name: 'Discontinuity',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n\n    currentTime = currentTime || 0;\n\n    if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      var lastDistance = null;\n\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var discontinuitySync = syncController.discontinuities[discontinuity];\n\n        if (discontinuitySync) {\n          var distance = Math.abs(currentTime - discontinuitySync.time);\n\n          // Once the distance begins to increase, we have passed\n          // currentTime and can stop looking for better candidates\n          if (lastDistance !== null && lastDistance < distance) {\n            break;\n          }\n\n          if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n            lastDistance = distance;\n            syncPoint = {\n              time: discontinuitySync.time,\n              segmentIndex: segmentIndex\n            };\n          }\n        }\n      }\n    }\n    return syncPoint;\n  }\n},\n// Stategy \"Playlist\": We have a playlist with a known mapping of\n//                     segment index to display time\n{\n  name: 'Playlist',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (playlist.syncInfo) {\n      var syncPoint = {\n        time: playlist.syncInfo.time,\n        segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence\n      };\n\n      return syncPoint;\n    }\n    return null;\n  }\n}];\n\nexports.syncPointStrategies = syncPointStrategies;\n\nvar SyncController = (function (_videojs$EventTarget) {\n  _inherits(SyncController, _videojs$EventTarget);\n\n  function SyncController() {\n    var options = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];\n\n    _classCallCheck(this, SyncController);\n\n    _get(Object.getPrototypeOf(SyncController.prototype), 'constructor', this).call(this);\n    // Segment Loader state variables...\n    // ...for synching across variants\n    this.inspectCache_ = undefined;\n\n    // ...for synching across variants\n    this.timelines = [];\n    this.discontinuities = [];\n    this.datetimeToDisplayTime = null;\n\n    if (options.debug) {\n      this.logger_ = _videoJs2['default'].log.bind(_videoJs2['default'], 'sync-controller ->');\n    }\n  }\n\n  /**\n   * Find a sync-point for the playlist specified\n   *\n   * A sync-point is defined as a known mapping from display-time to\n   * a segment-index in the current playlist.\n   *\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {Number} duration\n   *        Duration of the MediaSource (Infinite if playing a live source)\n   * @param {Number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @returns {Object}\n   *          A sync-point object\n   */\n\n  _createClass(SyncController, [{\n    key: 'getSyncPoint',\n    value: function getSyncPoint(playlist, duration, currentTimeline, currentTime) {\n      var syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime);\n\n      if (!syncPoints.length) {\n        // Signal that we need to attempt to get a sync-point manually\n        // by fetching a segment in the playlist and constructing\n        // a sync-point from that information\n        return null;\n      }\n\n      // Now find the sync-point that is closest to the currentTime because\n      // that should result in the most accurate guess about which segment\n      // to fetch\n      return this.selectSyncPoint_(syncPoints, { key: 'time', value: currentTime });\n    }\n\n    /**\n     * Calculate the amount of time that has expired off the playlist during playback\n     *\n     * @param {Playlist} playlist\n     *        Playlist object to calculate expired from\n     * @param {Number} duration\n     *        Duration of the MediaSource (Infinity if playling a live source)\n     * @returns {Number|null}\n     *          The amount of time that has expired off the playlist during playback. Null\n     *          if no sync-points for the playlist can be found.\n     */\n  }, {\n    key: 'getExpiredTime',\n    value: function getExpiredTime(playlist, duration) {\n      if (!playlist || !playlist.segments) {\n        return null;\n      }\n\n      var syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0);\n\n      // Without sync-points, there is not enough information to determine the expired time\n      if (!syncPoints.length) {\n        return null;\n      }\n\n      var syncPoint = this.selectSyncPoint_(syncPoints, {\n        key: 'segmentIndex',\n        value: 0\n      });\n\n      // If the sync-point is beyond the start of the playlist, we want to subtract the\n      // duration from index 0 to syncPoint.segmentIndex instead of adding.\n      if (syncPoint.segmentIndex > 0) {\n        syncPoint.time *= -1;\n      }\n\n      return Math.abs(syncPoint.time + (0, _playlist.sumDurations)(playlist, syncPoint.segmentIndex, 0));\n    }\n\n    /**\n     * Runs each sync-point strategy and returns a list of sync-points returned by the\n     * strategies\n     *\n     * @private\n     * @param {Playlist} playlist\n     *        The playlist that needs a sync-point\n     * @param {Number} duration\n     *        Duration of the MediaSource (Infinity if playing a live source)\n     * @param {Number} currentTimeline\n     *        The last timeline from which a segment was loaded\n     * @returns {Array}\n     *          A list of sync-point objects\n     */\n  }, {\n    key: 'runStrategies_',\n    value: function runStrategies_(playlist, duration, currentTimeline, currentTime) {\n      var syncPoints = [];\n\n      // Try to find a sync-point in by utilizing various strategies...\n      for (var i = 0; i < syncPointStrategies.length; i++) {\n        var strategy = syncPointStrategies[i];\n        var syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime);\n\n        if (syncPoint) {\n          syncPoint.strategy = strategy.name;\n          syncPoints.push({\n            strategy: strategy.name,\n            syncPoint: syncPoint\n          });\n          this.logger_('syncPoint found via <' + strategy.name + '>:', syncPoint);\n        }\n      }\n\n      return syncPoints;\n    }\n\n    /**\n     * Selects the sync-point nearest the specified target\n     *\n     * @private\n     * @param {Array} syncPoints\n     *        List of sync-points to select from\n     * @param {Object} target\n     *        Object specifying the property and value we are targeting\n     * @param {String} target.key\n     *        Specifies the property to target. Must be either 'time' or 'segmentIndex'\n     * @param {Number} target.value\n     *        The value to target for the specified key.\n     * @returns {Object}\n     *          The sync-point nearest the target\n     */\n  }, {\n    key: 'selectSyncPoint_',\n    value: function selectSyncPoint_(syncPoints, target) {\n      var bestSyncPoint = syncPoints[0].syncPoint;\n      var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n      var bestStrategy = syncPoints[0].strategy;\n\n      for (var i = 1; i < syncPoints.length; i++) {\n        var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n\n        if (newDistance < bestDistance) {\n          bestDistance = newDistance;\n          bestSyncPoint = syncPoints[i].syncPoint;\n          bestStrategy = syncPoints[i].strategy;\n        }\n      }\n\n      this.logger_('syncPoint with strategy <' + bestStrategy + '> chosen: ', bestSyncPoint);\n      return bestSyncPoint;\n    }\n\n    /**\n     * Save any meta-data present on the segments when segments leave\n     * the live window to the playlist to allow for synchronization at the\n     * playlist level later.\n     *\n     * @param {Playlist} oldPlaylist - The previous active playlist\n     * @param {Playlist} newPlaylist - The updated and most current playlist\n     */\n  }, {\n    key: 'saveExpiredSegmentInfo',\n    value: function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n      var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n\n      // When a segment expires from the playlist and it has a start time\n      // save that information as a possible sync-point reference in future\n      for (var i = mediaSequenceDiff - 1; i >= 0; i--) {\n        var lastRemovedSegment = oldPlaylist.segments[i];\n\n        if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n          newPlaylist.syncInfo = {\n            mediaSequence: oldPlaylist.mediaSequence + i,\n            time: lastRemovedSegment.start\n          };\n          this.logger_('playlist sync:', newPlaylist.syncInfo);\n          this.trigger('syncinfoupdate');\n          break;\n        }\n      }\n    }\n\n    /**\n     * Save the mapping from playlist's ProgramDateTime to display. This should\n     * only ever happen once at the start of playback.\n     *\n     * @param {Playlist} playlist - The currently active playlist\n     */\n  }, {\n    key: 'setDateTimeMapping',\n    value: function setDateTimeMapping(playlist) {\n      if (!this.datetimeToDisplayTime && playlist.dateTimeObject) {\n        var playlistTimestamp = playlist.dateTimeObject.getTime() / 1000;\n\n        this.datetimeToDisplayTime = -playlistTimestamp;\n      }\n    }\n\n    /**\n     * Reset the state of the inspection cache when we do a rendition\n     * switch\n     */\n  }, {\n    key: 'reset',\n    value: function reset() {\n      this.inspectCache_ = undefined;\n    }\n\n    /**\n     * Probe or inspect a fmp4 or an mpeg2-ts segment to determine the start\n     * and end of the segment in it's internal \"media time\". Used to generate\n     * mappings from that internal \"media time\" to the display time that is\n     * shown on the player.\n     *\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     */\n  }, {\n    key: 'probeSegmentInfo',\n    value: function probeSegmentInfo(segmentInfo) {\n      var segment = segmentInfo.segment;\n      var playlist = segmentInfo.playlist;\n      var timingInfo = undefined;\n\n      if (segment.map) {\n        timingInfo = this.probeMp4Segment_(segmentInfo);\n      } else {\n        timingInfo = this.probeTsSegment_(segmentInfo);\n      }\n\n      if (timingInfo) {\n        if (this.calculateSegmentTimeMapping_(segmentInfo, timingInfo)) {\n          this.saveDiscontinuitySyncInfo_(segmentInfo);\n\n          // If the playlist does not have sync information yet, record that information\n          // now with segment timing information\n          if (!playlist.syncInfo) {\n            playlist.syncInfo = {\n              mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n              time: segment.start\n            };\n          }\n        }\n      }\n\n      return timingInfo;\n    }\n\n    /**\n     * Probe an fmp4 or an mpeg2-ts segment to determine the start of the segment\n     * in it's internal \"media time\".\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     * @return {object} The start and end time of the current segment in \"media time\"\n     */\n  }, {\n    key: 'probeMp4Segment_',\n    value: function probeMp4Segment_(segmentInfo) {\n      var segment = segmentInfo.segment;\n      var timescales = _muxJsLibMp4Probe2['default'].timescale(segment.map.bytes);\n      var startTime = _muxJsLibMp4Probe2['default'].startTime(timescales, segmentInfo.bytes);\n\n      if (segmentInfo.timestampOffset !== null) {\n        segmentInfo.timestampOffset -= startTime;\n      }\n\n      return {\n        start: startTime,\n        end: startTime + segment.duration\n      };\n    }\n\n    /**\n     * Probe an mpeg2-ts segment to determine the start and end of the segment\n     * in it's internal \"media time\".\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     * @return {object} The start and end time of the current segment in \"media time\"\n     */\n  }, {\n    key: 'probeTsSegment_',\n    value: function probeTsSegment_(segmentInfo) {\n      var timeInfo = (0, _muxJsLibToolsTsInspectorJs.inspect)(segmentInfo.bytes, this.inspectCache_);\n      var segmentStartTime = undefined;\n      var segmentEndTime = undefined;\n\n      if (!timeInfo) {\n        return null;\n      }\n\n      if (timeInfo.video && timeInfo.video.length === 2) {\n        this.inspectCache_ = timeInfo.video[1].dts;\n        segmentStartTime = timeInfo.video[0].dtsTime;\n        segmentEndTime = timeInfo.video[1].dtsTime;\n      } else if (timeInfo.audio && timeInfo.audio.length === 2) {\n        this.inspectCache_ = timeInfo.audio[1].dts;\n        segmentStartTime = timeInfo.audio[0].dtsTime;\n        segmentEndTime = timeInfo.audio[1].dtsTime;\n      }\n\n      return {\n        start: segmentStartTime,\n        end: segmentEndTime,\n        containsVideo: timeInfo.video && timeInfo.video.length === 2,\n        containsAudio: timeInfo.audio && timeInfo.audio.length === 2\n      };\n    }\n  }, {\n    key: 'timestampOffsetForTimeline',\n    value: function timestampOffsetForTimeline(timeline) {\n      if (typeof this.timelines[timeline] === 'undefined') {\n        return null;\n      }\n      return this.timelines[timeline].time;\n    }\n  }, {\n    key: 'mappingForTimeline',\n    value: function mappingForTimeline(timeline) {\n      if (typeof this.timelines[timeline] === 'undefined') {\n        return null;\n      }\n      return this.timelines[timeline].mapping;\n    }\n\n    /**\n     * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n     * save that display time to the segment.\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo\n     *        The current active request information\n     * @param {object} timingInfo\n     *        The start and end time of the current segment in \"media time\"\n     * @returns {Boolean}\n     *          Returns false if segment time mapping could not be calculated\n     */\n  }, {\n    key: 'calculateSegmentTimeMapping_',\n    value: function calculateSegmentTimeMapping_(segmentInfo, timingInfo) {\n      var segment = segmentInfo.segment;\n      var mappingObj = this.timelines[segmentInfo.timeline];\n\n      if (segmentInfo.timestampOffset !== null) {\n        this.logger_('tsO:', segmentInfo.timestampOffset);\n\n        mappingObj = {\n          time: segmentInfo.startOfSegment,\n          mapping: segmentInfo.startOfSegment - timingInfo.start\n        };\n        this.timelines[segmentInfo.timeline] = mappingObj;\n        this.trigger('timestampoffset');\n\n        segment.start = segmentInfo.startOfSegment;\n        segment.end = timingInfo.end + mappingObj.mapping;\n      } else if (mappingObj) {\n        segment.start = timingInfo.start + mappingObj.mapping;\n        segment.end = timingInfo.end + mappingObj.mapping;\n      } else {\n        return false;\n      }\n\n      return true;\n    }\n\n    /**\n     * Each time we have discontinuity in the playlist, attempt to calculate the location\n     * in display of the start of the discontinuity and save that. We also save an accuracy\n     * value so that we save values with the most accuracy (closest to 0.)\n     *\n     * @private\n     * @param {SegmentInfo} segmentInfo - The current active request information\n     */\n  }, {\n    key: 'saveDiscontinuitySyncInfo_',\n    value: function saveDiscontinuitySyncInfo_(segmentInfo) {\n      var playlist = segmentInfo.playlist;\n      var segment = segmentInfo.segment;\n\n      // If the current segment is a discontinuity then we know exactly where\n      // the start of the range and it's accuracy is 0 (greater accuracy values\n      // mean more approximation)\n      if (segment.discontinuity) {\n        this.discontinuities[segment.timeline] = {\n          time: segment.start,\n          accuracy: 0\n        };\n      } else if (playlist.discontinuityStarts.length) {\n        // Search for future discontinuities that we can provide better timing\n        // information for and save that information for sync purposes\n        for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n          var segmentIndex = playlist.discontinuityStarts[i];\n          var discontinuity = playlist.discontinuitySequence + i + 1;\n          var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n          var accuracy = Math.abs(mediaIndexDiff);\n\n          if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n            var time = undefined;\n\n            if (mediaIndexDiff < 0) {\n              time = segment.start - (0, _playlist.sumDurations)(playlist, segmentInfo.mediaIndex, segmentIndex);\n            } else {\n              time = segment.end + (0, _playlist.sumDurations)(playlist, segmentInfo.mediaIndex + 1, segmentIndex);\n            }\n\n            this.discontinuities[discontinuity] = {\n              time: time,\n              accuracy: accuracy\n            };\n          }\n        }\n      }\n    }\n\n    /**\n     * A debugging logger noop that is set to console.log only if debugging\n     * is enabled globally\n     *\n     * @private\n     */\n  }, {\n    key: 'logger_',\n    value: function logger_() {}\n  }]);\n\n  return SyncController;\n})(_videoJs2['default'].EventTarget);\n\nexports['default'] = SyncController;","var has = require('../internals/has');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar indexOf = require('../internals/array-includes').indexOf;\nvar hiddenKeys = require('../internals/hidden-keys');\n\nmodule.exports = function (object, names) {\n  var O = toIndexedObject(object);\n  var i = 0;\n  var result = [];\n  var key;\n  for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);\n  // Don't enum bug & hidden keys\n  while (names.length > i) if (has(O, key = names[i++])) {\n    ~indexOf(result, key) || result.push(key);\n  }\n  return result;\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar $includes = require('../internals/array-includes').includes;\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// `Array.prototype.includes` method\n// https://tc39.es/ecma262/#sec-array.prototype.includes\n$({ target: 'Array', proto: true }, {\n  includes: function includes(el /* , fromIndex = 0 */) {\n    return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('includes');\n","var $ = require('../internals/export');\nvar fill = require('../internals/array-fill');\nvar addToUnscopables = require('../internals/add-to-unscopables');\n\n// `Array.prototype.fill` method\n// https://tc39.es/ecma262/#sec-array.prototype.fill\n$({ target: 'Array', proto: true }, {\n  fill: fill\n});\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('fill');\n","var global = require('../internals/global');\nvar isObject = require('../internals/is-object');\n\nvar document = global.document;\n// typeof document.createElement is 'object' in old IE\nvar EXISTS = isObject(document) && isObject(document.createElement);\n\nmodule.exports = function (it) {\n  return EXISTS ? document.createElement(it) : {};\n};\n","var $ = require('../internals/export');\nvar assign = require('../internals/object-assign');\n\n// `Object.assign` method\n// https://tc39.es/ecma262/#sec-object.assign\n// eslint-disable-next-line es/no-object-assign -- required for testing\n$({ target: 'Object', stat: true, forced: Object.assign !== assign }, {\n  assign: assign\n});\n","var anObject = require('../internals/an-object');\nvar isObject = require('../internals/is-object');\nvar newPromiseCapability = require('../internals/new-promise-capability');\n\nmodule.exports = function (C, x) {\n  anObject(C);\n  if (isObject(x) && x.constructor === C) return x;\n  var promiseCapability = newPromiseCapability.f(C);\n  var resolve = promiseCapability.resolve;\n  resolve(x);\n  return promiseCapability.promise;\n};\n","var global = require('../internals/global');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nmodule.exports = function (key, value) {\n  try {\n    createNonEnumerableProperty(global, key, value);\n  } catch (error) {\n    global[key] = value;\n  } return value;\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n'use strict';\n\nmodule.exports = Readable;\n/*<replacement>*/\n\nvar Duplex;\n/*</replacement>*/\n\nReadable.ReadableState = ReadableState;\n/*<replacement>*/\n\nvar EE = require('events').EventEmitter;\n\nvar EElistenerCount = function EElistenerCount(emitter, type) {\n  return emitter.listeners(type).length;\n};\n/*</replacement>*/\n\n/*<replacement>*/\n\n\nvar Stream = require('./internal/streams/stream');\n/*</replacement>*/\n\n\nvar Buffer = require('buffer').Buffer;\n\nvar OurUint8Array = global.Uint8Array || function () {};\n\nfunction _uint8ArrayToBuffer(chunk) {\n  return Buffer.from(chunk);\n}\n\nfunction _isUint8Array(obj) {\n  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n/*<replacement>*/\n\n\nvar debugUtil = require('util');\n\nvar debug;\n\nif (debugUtil && debugUtil.debuglog) {\n  debug = debugUtil.debuglog('stream');\n} else {\n  debug = function debug() {};\n}\n/*</replacement>*/\n\n\nvar BufferList = require('./internal/streams/buffer_list');\n\nvar destroyImpl = require('./internal/streams/destroy');\n\nvar _require = require('./internal/streams/state'),\n    getHighWaterMark = _require.getHighWaterMark;\n\nvar _require$codes = require('../errors').codes,\n    ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,\n    ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,\n    ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,\n    ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT; // Lazy loaded to improve the startup performance.\n\n\nvar StringDecoder;\nvar createReadableStreamAsyncIterator;\nvar from;\n\nrequire('inherits')(Readable, Stream);\n\nvar errorOrDestroy = destroyImpl.errorOrDestroy;\nvar kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];\n\nfunction prependListener(emitter, event, fn) {\n  // Sadly this is not cacheable as some libraries bundle their own\n  // event emitter implementation with them.\n  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn); // This is a hack to make sure that our error handler is attached before any\n  // userland ones.  NEVER DO THIS. This is here only because this code needs\n  // to continue to work with older versions of Node.js that do not include\n  // the prependListener() method. The goal is to eventually remove this hack.\n\n  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];\n}\n\nfunction ReadableState(options, stream, isDuplex) {\n  Duplex = Duplex || require('./_stream_duplex');\n  options = options || {}; // Duplex streams are both readable and writable, but share\n  // the same options object.\n  // However, some cases require setting options to different\n  // values for the readable and the writable sides of the duplex stream.\n  // These options can be provided separately as readableXXX and writableXXX.\n\n  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag. Used to make read(n) ignore n and to\n  // make all the buffer merging and length checks go away\n\n  this.objectMode = !!options.objectMode;\n  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode; // the point at which it stops calling _read() to fill the buffer\n  // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n\n  this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex); // A linked list is used to store data chunks instead of an array because the\n  // linked list can remove elements from the beginning faster than\n  // array.shift()\n\n  this.buffer = new BufferList();\n  this.length = 0;\n  this.pipes = null;\n  this.pipesCount = 0;\n  this.flowing = null;\n  this.ended = false;\n  this.endEmitted = false;\n  this.reading = false; // a flag to be able to tell if the event 'readable'/'data' is emitted\n  // immediately, or on a later tick.  We set this to true at first, because\n  // any actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first read call.\n\n  this.sync = true; // whenever we return null, then we set a flag to say\n  // that we're awaiting a 'readable' event emission.\n\n  this.needReadable = false;\n  this.emittedReadable = false;\n  this.readableListening = false;\n  this.resumeScheduled = false;\n  this.paused = true; // Should close be emitted on destroy. Defaults to true.\n\n  this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'end' (and potentially 'finish')\n\n  this.autoDestroy = !!options.autoDestroy; // has it been destroyed\n\n  this.destroyed = false; // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n\n  this.defaultEncoding = options.defaultEncoding || 'utf8'; // the number of writers that are awaiting a drain event in .pipe()s\n\n  this.awaitDrain = 0; // if true, a maybeReadMore has been scheduled\n\n  this.readingMore = false;\n  this.decoder = null;\n  this.encoding = null;\n\n  if (options.encoding) {\n    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n    this.decoder = new StringDecoder(options.encoding);\n    this.encoding = options.encoding;\n  }\n}\n\nfunction Readable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n  if (!(this instanceof Readable)) return new Readable(options); // Checking for a Stream.Duplex instance is faster here instead of inside\n  // the ReadableState constructor, at least with V8 6.5\n\n  var isDuplex = this instanceof Duplex;\n  this._readableState = new ReadableState(options, this, isDuplex); // legacy\n\n  this.readable = true;\n\n  if (options) {\n    if (typeof options.read === 'function') this._read = options.read;\n    if (typeof options.destroy === 'function') this._destroy = options.destroy;\n  }\n\n  Stream.call(this);\n}\n\nObject.defineProperty(Readable.prototype, 'destroyed', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    if (this._readableState === undefined) {\n      return false;\n    }\n\n    return this._readableState.destroyed;\n  },\n  set: function set(value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (!this._readableState) {\n      return;\n    } // backward compatibility, the user is explicitly\n    // managing destroyed\n\n\n    this._readableState.destroyed = value;\n  }\n});\nReadable.prototype.destroy = destroyImpl.destroy;\nReadable.prototype._undestroy = destroyImpl.undestroy;\n\nReadable.prototype._destroy = function (err, cb) {\n  cb(err);\n}; // Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\n\n\nReadable.prototype.push = function (chunk, encoding) {\n  var state = this._readableState;\n  var skipChunkCheck;\n\n  if (!state.objectMode) {\n    if (typeof chunk === 'string') {\n      encoding = encoding || state.defaultEncoding;\n\n      if (encoding !== state.encoding) {\n        chunk = Buffer.from(chunk, encoding);\n        encoding = '';\n      }\n\n      skipChunkCheck = true;\n    }\n  } else {\n    skipChunkCheck = true;\n  }\n\n  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);\n}; // Unshift should *always* be something directly out of read()\n\n\nReadable.prototype.unshift = function (chunk) {\n  return readableAddChunk(this, chunk, null, true, false);\n};\n\nfunction readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {\n  debug('readableAddChunk', chunk);\n  var state = stream._readableState;\n\n  if (chunk === null) {\n    state.reading = false;\n    onEofChunk(stream, state);\n  } else {\n    var er;\n    if (!skipChunkCheck) er = chunkInvalid(state, chunk);\n\n    if (er) {\n      errorOrDestroy(stream, er);\n    } else if (state.objectMode || chunk && chunk.length > 0) {\n      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {\n        chunk = _uint8ArrayToBuffer(chunk);\n      }\n\n      if (addToFront) {\n        if (state.endEmitted) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);\n      } else if (state.ended) {\n        errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF());\n      } else if (state.destroyed) {\n        return false;\n      } else {\n        state.reading = false;\n\n        if (state.decoder && !encoding) {\n          chunk = state.decoder.write(chunk);\n          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);\n        } else {\n          addChunk(stream, state, chunk, false);\n        }\n      }\n    } else if (!addToFront) {\n      state.reading = false;\n      maybeReadMore(stream, state);\n    }\n  } // We can push more data if we are below the highWaterMark.\n  // Also, if we have no data yet, we can stand some more bytes.\n  // This is to work around cases where hwm=0, such as the repl.\n\n\n  return !state.ended && (state.length < state.highWaterMark || state.length === 0);\n}\n\nfunction addChunk(stream, state, chunk, addToFront) {\n  if (state.flowing && state.length === 0 && !state.sync) {\n    state.awaitDrain = 0;\n    stream.emit('data', chunk);\n  } else {\n    // update the buffer info.\n    state.length += state.objectMode ? 1 : chunk.length;\n    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);\n    if (state.needReadable) emitReadable(stream);\n  }\n\n  maybeReadMore(stream, state);\n}\n\nfunction chunkInvalid(state, chunk) {\n  var er;\n\n  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {\n    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);\n  }\n\n  return er;\n}\n\nReadable.prototype.isPaused = function () {\n  return this._readableState.flowing === false;\n}; // backwards compatibility.\n\n\nReadable.prototype.setEncoding = function (enc) {\n  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n  var decoder = new StringDecoder(enc);\n  this._readableState.decoder = decoder; // If setEncoding(null), decoder.encoding equals utf8\n\n  this._readableState.encoding = this._readableState.decoder.encoding; // Iterate over current buffer to convert already stored Buffers:\n\n  var p = this._readableState.buffer.head;\n  var content = '';\n\n  while (p !== null) {\n    content += decoder.write(p.data);\n    p = p.next;\n  }\n\n  this._readableState.buffer.clear();\n\n  if (content !== '') this._readableState.buffer.push(content);\n  this._readableState.length = content.length;\n  return this;\n}; // Don't raise the hwm > 1GB\n\n\nvar MAX_HWM = 0x40000000;\n\nfunction computeNewHighWaterMark(n) {\n  if (n >= MAX_HWM) {\n    // TODO(ronag): Throw ERR_VALUE_OUT_OF_RANGE.\n    n = MAX_HWM;\n  } else {\n    // Get the next highest power of 2 to prevent increasing hwm excessively in\n    // tiny amounts\n    n--;\n    n |= n >>> 1;\n    n |= n >>> 2;\n    n |= n >>> 4;\n    n |= n >>> 8;\n    n |= n >>> 16;\n    n++;\n  }\n\n  return n;\n} // This function is designed to be inlinable, so please take care when making\n// changes to the function body.\n\n\nfunction howMuchToRead(n, state) {\n  if (n <= 0 || state.length === 0 && state.ended) return 0;\n  if (state.objectMode) return 1;\n\n  if (n !== n) {\n    // Only flow one buffer at a time\n    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;\n  } // If we're asking for more than the current hwm, then raise the hwm.\n\n\n  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);\n  if (n <= state.length) return n; // Don't have enough\n\n  if (!state.ended) {\n    state.needReadable = true;\n    return 0;\n  }\n\n  return state.length;\n} // you can override either this method, or the async _read(n) below.\n\n\nReadable.prototype.read = function (n) {\n  debug('read', n);\n  n = parseInt(n, 10);\n  var state = this._readableState;\n  var nOrig = n;\n  if (n !== 0) state.emittedReadable = false; // if we're doing read(0) to trigger a readable event, but we\n  // already have a bunch of data in the buffer, then just trigger\n  // the 'readable' event and move on.\n\n  if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {\n    debug('read: emitReadable', state.length, state.ended);\n    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);\n    return null;\n  }\n\n  n = howMuchToRead(n, state); // if we've ended, and we're now clear, then finish it up.\n\n  if (n === 0 && state.ended) {\n    if (state.length === 0) endReadable(this);\n    return null;\n  } // All the actual chunk generation logic needs to be\n  // *below* the call to _read.  The reason is that in certain\n  // synthetic stream cases, such as passthrough streams, _read\n  // may be a completely synchronous operation which may change\n  // the state of the read buffer, providing enough data when\n  // before there was *not* enough.\n  //\n  // So, the steps are:\n  // 1. Figure out what the state of things will be after we do\n  // a read from the buffer.\n  //\n  // 2. If that resulting state will trigger a _read, then call _read.\n  // Note that this may be asynchronous, or synchronous.  Yes, it is\n  // deeply ugly to write APIs this way, but that still doesn't mean\n  // that the Readable class should behave improperly, as streams are\n  // designed to be sync/async agnostic.\n  // Take note if the _read call is sync or async (ie, if the read call\n  // has returned yet), so that we know whether or not it's safe to emit\n  // 'readable' etc.\n  //\n  // 3. Actually pull the requested chunks out of the buffer and return.\n  // if we need a readable event, then we need to do some reading.\n\n\n  var doRead = state.needReadable;\n  debug('need readable', doRead); // if we currently have less than the highWaterMark, then also read some\n\n  if (state.length === 0 || state.length - n < state.highWaterMark) {\n    doRead = true;\n    debug('length less than watermark', doRead);\n  } // however, if we've ended, then there's no point, and if we're already\n  // reading, then it's unnecessary.\n\n\n  if (state.ended || state.reading) {\n    doRead = false;\n    debug('reading or ended', doRead);\n  } else if (doRead) {\n    debug('do read');\n    state.reading = true;\n    state.sync = true; // if the length is currently zero, then we *need* a readable event.\n\n    if (state.length === 0) state.needReadable = true; // call internal read method\n\n    this._read(state.highWaterMark);\n\n    state.sync = false; // If _read pushed data synchronously, then `reading` will be false,\n    // and we need to re-evaluate how much data we can return to the user.\n\n    if (!state.reading) n = howMuchToRead(nOrig, state);\n  }\n\n  var ret;\n  if (n > 0) ret = fromList(n, state);else ret = null;\n\n  if (ret === null) {\n    state.needReadable = state.length <= state.highWaterMark;\n    n = 0;\n  } else {\n    state.length -= n;\n    state.awaitDrain = 0;\n  }\n\n  if (state.length === 0) {\n    // If we have nothing in the buffer, then we want to know\n    // as soon as we *do* get something into the buffer.\n    if (!state.ended) state.needReadable = true; // If we tried to read() past the EOF, then emit end on the next tick.\n\n    if (nOrig !== n && state.ended) endReadable(this);\n  }\n\n  if (ret !== null) this.emit('data', ret);\n  return ret;\n};\n\nfunction onEofChunk(stream, state) {\n  debug('onEofChunk');\n  if (state.ended) return;\n\n  if (state.decoder) {\n    var chunk = state.decoder.end();\n\n    if (chunk && chunk.length) {\n      state.buffer.push(chunk);\n      state.length += state.objectMode ? 1 : chunk.length;\n    }\n  }\n\n  state.ended = true;\n\n  if (state.sync) {\n    // if we are sync, wait until next tick to emit the data.\n    // Otherwise we risk emitting data in the flow()\n    // the readable code triggers during a read() call\n    emitReadable(stream);\n  } else {\n    // emit 'readable' now to make sure it gets picked up.\n    state.needReadable = false;\n\n    if (!state.emittedReadable) {\n      state.emittedReadable = true;\n      emitReadable_(stream);\n    }\n  }\n} // Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow.  This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\n\n\nfunction emitReadable(stream) {\n  var state = stream._readableState;\n  debug('emitReadable', state.needReadable, state.emittedReadable);\n  state.needReadable = false;\n\n  if (!state.emittedReadable) {\n    debug('emitReadable', state.flowing);\n    state.emittedReadable = true;\n    process.nextTick(emitReadable_, stream);\n  }\n}\n\nfunction emitReadable_(stream) {\n  var state = stream._readableState;\n  debug('emitReadable_', state.destroyed, state.length, state.ended);\n\n  if (!state.destroyed && (state.length || state.ended)) {\n    stream.emit('readable');\n    state.emittedReadable = false;\n  } // The stream needs another readable event if\n  // 1. It is not flowing, as the flow mechanism will take\n  //    care of it.\n  // 2. It is not ended.\n  // 3. It is below the highWaterMark, so we can schedule\n  //    another readable later.\n\n\n  state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;\n  flow(stream);\n} // at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data.  that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\n\n\nfunction maybeReadMore(stream, state) {\n  if (!state.readingMore) {\n    state.readingMore = true;\n    process.nextTick(maybeReadMore_, stream, state);\n  }\n}\n\nfunction maybeReadMore_(stream, state) {\n  // Attempt to read more data if we should.\n  //\n  // The conditions for reading more data are (one of):\n  // - Not enough data buffered (state.length < state.highWaterMark). The loop\n  //   is responsible for filling the buffer with enough data if such data\n  //   is available. If highWaterMark is 0 and we are not in the flowing mode\n  //   we should _not_ attempt to buffer any extra data. We'll get more data\n  //   when the stream consumer calls read() instead.\n  // - No data in the buffer, and the stream is in flowing mode. In this mode\n  //   the loop below is responsible for ensuring read() is called. Failing to\n  //   call read here would abort the flow and there's no other mechanism for\n  //   continuing the flow if the stream consumer has just subscribed to the\n  //   'data' event.\n  //\n  // In addition to the above conditions to keep reading data, the following\n  // conditions prevent the data from being read:\n  // - The stream has ended (state.ended).\n  // - There is already a pending 'read' operation (state.reading). This is a\n  //   case where the the stream has called the implementation defined _read()\n  //   method, but they are processing the call asynchronously and have _not_\n  //   called push() with new data. In this case we skip performing more\n  //   read()s. The execution ends in this method again after the _read() ends\n  //   up calling push() with more data.\n  while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {\n    var len = state.length;\n    debug('maybeReadMore read 0');\n    stream.read(0);\n    if (len === state.length) // didn't get any data, stop spinning.\n      break;\n  }\n\n  state.readingMore = false;\n} // abstract method.  to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\n\n\nReadable.prototype._read = function (n) {\n  errorOrDestroy(this, new ERR_METHOD_NOT_IMPLEMENTED('_read()'));\n};\n\nReadable.prototype.pipe = function (dest, pipeOpts) {\n  var src = this;\n  var state = this._readableState;\n\n  switch (state.pipesCount) {\n    case 0:\n      state.pipes = dest;\n      break;\n\n    case 1:\n      state.pipes = [state.pipes, dest];\n      break;\n\n    default:\n      state.pipes.push(dest);\n      break;\n  }\n\n  state.pipesCount += 1;\n  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;\n  var endFn = doEnd ? onend : unpipe;\n  if (state.endEmitted) process.nextTick(endFn);else src.once('end', endFn);\n  dest.on('unpipe', onunpipe);\n\n  function onunpipe(readable, unpipeInfo) {\n    debug('onunpipe');\n\n    if (readable === src) {\n      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {\n        unpipeInfo.hasUnpiped = true;\n        cleanup();\n      }\n    }\n  }\n\n  function onend() {\n    debug('onend');\n    dest.end();\n  } // when the dest drains, it reduces the awaitDrain counter\n  // on the source.  This would be more elegant with a .once()\n  // handler in flow(), but adding and removing repeatedly is\n  // too slow.\n\n\n  var ondrain = pipeOnDrain(src);\n  dest.on('drain', ondrain);\n  var cleanedUp = false;\n\n  function cleanup() {\n    debug('cleanup'); // cleanup event handlers once the pipe is broken\n\n    dest.removeListener('close', onclose);\n    dest.removeListener('finish', onfinish);\n    dest.removeListener('drain', ondrain);\n    dest.removeListener('error', onerror);\n    dest.removeListener('unpipe', onunpipe);\n    src.removeListener('end', onend);\n    src.removeListener('end', unpipe);\n    src.removeListener('data', ondata);\n    cleanedUp = true; // if the reader is waiting for a drain event from this\n    // specific writer, then it would cause it to never start\n    // flowing again.\n    // So, if this is awaiting a drain, then we just call it now.\n    // If we don't know, then assume that we are waiting for one.\n\n    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();\n  }\n\n  src.on('data', ondata);\n\n  function ondata(chunk) {\n    debug('ondata');\n    var ret = dest.write(chunk);\n    debug('dest.write', ret);\n\n    if (ret === false) {\n      // If the user unpiped during `dest.write()`, it is possible\n      // to get stuck in a permanently paused state if that write\n      // also returned false.\n      // => Check whether `dest` is still a piping destination.\n      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {\n        debug('false write response, pause', state.awaitDrain);\n        state.awaitDrain++;\n      }\n\n      src.pause();\n    }\n  } // if the dest has an error, then stop piping into it.\n  // however, don't suppress the throwing behavior for this.\n\n\n  function onerror(er) {\n    debug('onerror', er);\n    unpipe();\n    dest.removeListener('error', onerror);\n    if (EElistenerCount(dest, 'error') === 0) errorOrDestroy(dest, er);\n  } // Make sure our error handler is attached before userland ones.\n\n\n  prependListener(dest, 'error', onerror); // Both close and finish should trigger unpipe, but only once.\n\n  function onclose() {\n    dest.removeListener('finish', onfinish);\n    unpipe();\n  }\n\n  dest.once('close', onclose);\n\n  function onfinish() {\n    debug('onfinish');\n    dest.removeListener('close', onclose);\n    unpipe();\n  }\n\n  dest.once('finish', onfinish);\n\n  function unpipe() {\n    debug('unpipe');\n    src.unpipe(dest);\n  } // tell the dest that it's being piped to\n\n\n  dest.emit('pipe', src); // start the flow if it hasn't been started already.\n\n  if (!state.flowing) {\n    debug('pipe resume');\n    src.resume();\n  }\n\n  return dest;\n};\n\nfunction pipeOnDrain(src) {\n  return function pipeOnDrainFunctionResult() {\n    var state = src._readableState;\n    debug('pipeOnDrain', state.awaitDrain);\n    if (state.awaitDrain) state.awaitDrain--;\n\n    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n      state.flowing = true;\n      flow(src);\n    }\n  };\n}\n\nReadable.prototype.unpipe = function (dest) {\n  var state = this._readableState;\n  var unpipeInfo = {\n    hasUnpiped: false\n  }; // if we're not piping anywhere, then do nothing.\n\n  if (state.pipesCount === 0) return this; // just one destination.  most common case.\n\n  if (state.pipesCount === 1) {\n    // passed in one, but it's not the right one.\n    if (dest && dest !== state.pipes) return this;\n    if (!dest) dest = state.pipes; // got a match.\n\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n    if (dest) dest.emit('unpipe', this, unpipeInfo);\n    return this;\n  } // slow case. multiple pipe destinations.\n\n\n  if (!dest) {\n    // remove all.\n    var dests = state.pipes;\n    var len = state.pipesCount;\n    state.pipes = null;\n    state.pipesCount = 0;\n    state.flowing = false;\n\n    for (var i = 0; i < len; i++) {\n      dests[i].emit('unpipe', this, {\n        hasUnpiped: false\n      });\n    }\n\n    return this;\n  } // try to find the right one.\n\n\n  var index = indexOf(state.pipes, dest);\n  if (index === -1) return this;\n  state.pipes.splice(index, 1);\n  state.pipesCount -= 1;\n  if (state.pipesCount === 1) state.pipes = state.pipes[0];\n  dest.emit('unpipe', this, unpipeInfo);\n  return this;\n}; // set up data events if they are asked for\n// Ensure readable listeners eventually get something\n\n\nReadable.prototype.on = function (ev, fn) {\n  var res = Stream.prototype.on.call(this, ev, fn);\n  var state = this._readableState;\n\n  if (ev === 'data') {\n    // update readableListening so that resume() may be a no-op\n    // a few lines down. This is needed to support once('readable').\n    state.readableListening = this.listenerCount('readable') > 0; // Try start flowing on next tick if stream isn't explicitly paused\n\n    if (state.flowing !== false) this.resume();\n  } else if (ev === 'readable') {\n    if (!state.endEmitted && !state.readableListening) {\n      state.readableListening = state.needReadable = true;\n      state.flowing = false;\n      state.emittedReadable = false;\n      debug('on readable', state.length, state.reading);\n\n      if (state.length) {\n        emitReadable(this);\n      } else if (!state.reading) {\n        process.nextTick(nReadingNextTick, this);\n      }\n    }\n  }\n\n  return res;\n};\n\nReadable.prototype.addListener = Readable.prototype.on;\n\nReadable.prototype.removeListener = function (ev, fn) {\n  var res = Stream.prototype.removeListener.call(this, ev, fn);\n\n  if (ev === 'readable') {\n    // We need to check if there is someone still listening to\n    // readable and reset the state. However this needs to happen\n    // after readable has been emitted but before I/O (nextTick) to\n    // support once('readable', fn) cycles. This means that calling\n    // resume within the same tick will have no\n    // effect.\n    process.nextTick(updateReadableListening, this);\n  }\n\n  return res;\n};\n\nReadable.prototype.removeAllListeners = function (ev) {\n  var res = Stream.prototype.removeAllListeners.apply(this, arguments);\n\n  if (ev === 'readable' || ev === undefined) {\n    // We need to check if there is someone still listening to\n    // readable and reset the state. However this needs to happen\n    // after readable has been emitted but before I/O (nextTick) to\n    // support once('readable', fn) cycles. This means that calling\n    // resume within the same tick will have no\n    // effect.\n    process.nextTick(updateReadableListening, this);\n  }\n\n  return res;\n};\n\nfunction updateReadableListening(self) {\n  var state = self._readableState;\n  state.readableListening = self.listenerCount('readable') > 0;\n\n  if (state.resumeScheduled && !state.paused) {\n    // flowing needs to be set to true now, otherwise\n    // the upcoming resume will not flow.\n    state.flowing = true; // crude way to check if we should resume\n  } else if (self.listenerCount('data') > 0) {\n    self.resume();\n  }\n}\n\nfunction nReadingNextTick(self) {\n  debug('readable nexttick read 0');\n  self.read(0);\n} // pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\n\n\nReadable.prototype.resume = function () {\n  var state = this._readableState;\n\n  if (!state.flowing) {\n    debug('resume'); // we flow only if there is no one listening\n    // for readable, but we still have to call\n    // resume()\n\n    state.flowing = !state.readableListening;\n    resume(this, state);\n  }\n\n  state.paused = false;\n  return this;\n};\n\nfunction resume(stream, state) {\n  if (!state.resumeScheduled) {\n    state.resumeScheduled = true;\n    process.nextTick(resume_, stream, state);\n  }\n}\n\nfunction resume_(stream, state) {\n  debug('resume', state.reading);\n\n  if (!state.reading) {\n    stream.read(0);\n  }\n\n  state.resumeScheduled = false;\n  stream.emit('resume');\n  flow(stream);\n  if (state.flowing && !state.reading) stream.read(0);\n}\n\nReadable.prototype.pause = function () {\n  debug('call pause flowing=%j', this._readableState.flowing);\n\n  if (this._readableState.flowing !== false) {\n    debug('pause');\n    this._readableState.flowing = false;\n    this.emit('pause');\n  }\n\n  this._readableState.paused = true;\n  return this;\n};\n\nfunction flow(stream) {\n  var state = stream._readableState;\n  debug('flow', state.flowing);\n\n  while (state.flowing && stream.read() !== null) {\n    ;\n  }\n} // wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\n\n\nReadable.prototype.wrap = function (stream) {\n  var _this = this;\n\n  var state = this._readableState;\n  var paused = false;\n  stream.on('end', function () {\n    debug('wrapped end');\n\n    if (state.decoder && !state.ended) {\n      var chunk = state.decoder.end();\n      if (chunk && chunk.length) _this.push(chunk);\n    }\n\n    _this.push(null);\n  });\n  stream.on('data', function (chunk) {\n    debug('wrapped data');\n    if (state.decoder) chunk = state.decoder.write(chunk); // don't skip over falsy values in objectMode\n\n    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;\n\n    var ret = _this.push(chunk);\n\n    if (!ret) {\n      paused = true;\n      stream.pause();\n    }\n  }); // proxy all the other methods.\n  // important when wrapping filters and duplexes.\n\n  for (var i in stream) {\n    if (this[i] === undefined && typeof stream[i] === 'function') {\n      this[i] = function methodWrap(method) {\n        return function methodWrapReturnFunction() {\n          return stream[method].apply(stream, arguments);\n        };\n      }(i);\n    }\n  } // proxy certain important events.\n\n\n  for (var n = 0; n < kProxyEvents.length; n++) {\n    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));\n  } // when we try to consume some more bytes, simply unpause the\n  // underlying stream.\n\n\n  this._read = function (n) {\n    debug('wrapped _read', n);\n\n    if (paused) {\n      paused = false;\n      stream.resume();\n    }\n  };\n\n  return this;\n};\n\nif (typeof Symbol === 'function') {\n  Readable.prototype[Symbol.asyncIterator] = function () {\n    if (createReadableStreamAsyncIterator === undefined) {\n      createReadableStreamAsyncIterator = require('./internal/streams/async_iterator');\n    }\n\n    return createReadableStreamAsyncIterator(this);\n  };\n}\n\nObject.defineProperty(Readable.prototype, 'readableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState.highWaterMark;\n  }\n});\nObject.defineProperty(Readable.prototype, 'readableBuffer', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState && this._readableState.buffer;\n  }\n});\nObject.defineProperty(Readable.prototype, 'readableFlowing', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState.flowing;\n  },\n  set: function set(state) {\n    if (this._readableState) {\n      this._readableState.flowing = state;\n    }\n  }\n}); // exposed for testing purposes only.\n\nReadable._fromList = fromList;\nObject.defineProperty(Readable.prototype, 'readableLength', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._readableState.length;\n  }\n}); // Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\n\nfunction fromList(n, state) {\n  // nothing buffered\n  if (state.length === 0) return null;\n  var ret;\n  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {\n    // read it all, truncate the list\n    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.first();else ret = state.buffer.concat(state.length);\n    state.buffer.clear();\n  } else {\n    // read part of list\n    ret = state.buffer.consume(n, state.decoder);\n  }\n  return ret;\n}\n\nfunction endReadable(stream) {\n  var state = stream._readableState;\n  debug('endReadable', state.endEmitted);\n\n  if (!state.endEmitted) {\n    state.ended = true;\n    process.nextTick(endReadableNT, state, stream);\n  }\n}\n\nfunction endReadableNT(state, stream) {\n  debug('endReadableNT', state.endEmitted, state.length); // Check that we didn't get one last unshift.\n\n  if (!state.endEmitted && state.length === 0) {\n    state.endEmitted = true;\n    stream.readable = false;\n    stream.emit('end');\n\n    if (state.autoDestroy) {\n      // In case of duplex streams we need a way to detect\n      // if the writable side is ready for autoDestroy as well\n      var wState = stream._writableState;\n\n      if (!wState || wState.autoDestroy && wState.finished) {\n        stream.destroy();\n      }\n    }\n  }\n}\n\nif (typeof Symbol === 'function') {\n  Readable.from = function (iterable, opts) {\n    if (from === undefined) {\n      from = require('./internal/streams/from');\n    }\n\n    return from(Readable, iterable, opts);\n  };\n}\n\nfunction indexOf(xs, x) {\n  for (var i = 0, l = xs.length; i < l; i++) {\n    if (xs[i] === x) return i;\n  }\n\n  return -1;\n}","'use strict';\n\nconst inherits = require('inherits');\n\nconst bignum = require('bn.js');\nconst DecoderBuffer = require('../base/buffer').DecoderBuffer;\nconst Node = require('../base/node');\n\n// Import DER constants\nconst der = require('../constants/der');\n\nfunction DERDecoder(entity) {\n  this.enc = 'der';\n  this.name = entity.name;\n  this.entity = entity;\n\n  // Construct base tree\n  this.tree = new DERNode();\n  this.tree._init(entity.body);\n}\nmodule.exports = DERDecoder;\n\nDERDecoder.prototype.decode = function decode(data, options) {\n  if (!DecoderBuffer.isDecoderBuffer(data)) {\n    data = new DecoderBuffer(data, options);\n  }\n\n  return this.tree._decode(data, options);\n};\n\n// Tree methods\n\nfunction DERNode(parent) {\n  Node.call(this, 'der', parent);\n}\ninherits(DERNode, Node);\n\nDERNode.prototype._peekTag = function peekTag(buffer, tag, any) {\n  if (buffer.isEmpty())\n    return false;\n\n  const state = buffer.save();\n  const decodedTag = derDecodeTag(buffer, 'Failed to peek tag: \"' + tag + '\"');\n  if (buffer.isError(decodedTag))\n    return decodedTag;\n\n  buffer.restore(state);\n\n  return decodedTag.tag === tag || decodedTag.tagStr === tag ||\n    (decodedTag.tagStr + 'of') === tag || any;\n};\n\nDERNode.prototype._decodeTag = function decodeTag(buffer, tag, any) {\n  const decodedTag = derDecodeTag(buffer,\n    'Failed to decode tag of \"' + tag + '\"');\n  if (buffer.isError(decodedTag))\n    return decodedTag;\n\n  let len = derDecodeLen(buffer,\n    decodedTag.primitive,\n    'Failed to get length of \"' + tag + '\"');\n\n  // Failure\n  if (buffer.isError(len))\n    return len;\n\n  if (!any &&\n      decodedTag.tag !== tag &&\n      decodedTag.tagStr !== tag &&\n      decodedTag.tagStr + 'of' !== tag) {\n    return buffer.error('Failed to match tag: \"' + tag + '\"');\n  }\n\n  if (decodedTag.primitive || len !== null)\n    return buffer.skip(len, 'Failed to match body of: \"' + tag + '\"');\n\n  // Indefinite length... find END tag\n  const state = buffer.save();\n  const res = this._skipUntilEnd(\n    buffer,\n    'Failed to skip indefinite length body: \"' + this.tag + '\"');\n  if (buffer.isError(res))\n    return res;\n\n  len = buffer.offset - state.offset;\n  buffer.restore(state);\n  return buffer.skip(len, 'Failed to match body of: \"' + tag + '\"');\n};\n\nDERNode.prototype._skipUntilEnd = function skipUntilEnd(buffer, fail) {\n  for (;;) {\n    const tag = derDecodeTag(buffer, fail);\n    if (buffer.isError(tag))\n      return tag;\n    const len = derDecodeLen(buffer, tag.primitive, fail);\n    if (buffer.isError(len))\n      return len;\n\n    let res;\n    if (tag.primitive || len !== null)\n      res = buffer.skip(len);\n    else\n      res = this._skipUntilEnd(buffer, fail);\n\n    // Failure\n    if (buffer.isError(res))\n      return res;\n\n    if (tag.tagStr === 'end')\n      break;\n  }\n};\n\nDERNode.prototype._decodeList = function decodeList(buffer, tag, decoder,\n  options) {\n  const result = [];\n  while (!buffer.isEmpty()) {\n    const possibleEnd = this._peekTag(buffer, 'end');\n    if (buffer.isError(possibleEnd))\n      return possibleEnd;\n\n    const res = decoder.decode(buffer, 'der', options);\n    if (buffer.isError(res) && possibleEnd)\n      break;\n    result.push(res);\n  }\n  return result;\n};\n\nDERNode.prototype._decodeStr = function decodeStr(buffer, tag) {\n  if (tag === 'bitstr') {\n    const unused = buffer.readUInt8();\n    if (buffer.isError(unused))\n      return unused;\n    return { unused: unused, data: buffer.raw() };\n  } else if (tag === 'bmpstr') {\n    const raw = buffer.raw();\n    if (raw.length % 2 === 1)\n      return buffer.error('Decoding of string type: bmpstr length mismatch');\n\n    let str = '';\n    for (let i = 0; i < raw.length / 2; i++) {\n      str += String.fromCharCode(raw.readUInt16BE(i * 2));\n    }\n    return str;\n  } else if (tag === 'numstr') {\n    const numstr = buffer.raw().toString('ascii');\n    if (!this._isNumstr(numstr)) {\n      return buffer.error('Decoding of string type: ' +\n                          'numstr unsupported characters');\n    }\n    return numstr;\n  } else if (tag === 'octstr') {\n    return buffer.raw();\n  } else if (tag === 'objDesc') {\n    return buffer.raw();\n  } else if (tag === 'printstr') {\n    const printstr = buffer.raw().toString('ascii');\n    if (!this._isPrintstr(printstr)) {\n      return buffer.error('Decoding of string type: ' +\n                          'printstr unsupported characters');\n    }\n    return printstr;\n  } else if (/str$/.test(tag)) {\n    return buffer.raw().toString();\n  } else {\n    return buffer.error('Decoding of string type: ' + tag + ' unsupported');\n  }\n};\n\nDERNode.prototype._decodeObjid = function decodeObjid(buffer, values, relative) {\n  let result;\n  const identifiers = [];\n  let ident = 0;\n  let subident = 0;\n  while (!buffer.isEmpty()) {\n    subident = buffer.readUInt8();\n    ident <<= 7;\n    ident |= subident & 0x7f;\n    if ((subident & 0x80) === 0) {\n      identifiers.push(ident);\n      ident = 0;\n    }\n  }\n  if (subident & 0x80)\n    identifiers.push(ident);\n\n  const first = (identifiers[0] / 40) | 0;\n  const second = identifiers[0] % 40;\n\n  if (relative)\n    result = identifiers;\n  else\n    result = [first, second].concat(identifiers.slice(1));\n\n  if (values) {\n    let tmp = values[result.join(' ')];\n    if (tmp === undefined)\n      tmp = values[result.join('.')];\n    if (tmp !== undefined)\n      result = tmp;\n  }\n\n  return result;\n};\n\nDERNode.prototype._decodeTime = function decodeTime(buffer, tag) {\n  const str = buffer.raw().toString();\n\n  let year;\n  let mon;\n  let day;\n  let hour;\n  let min;\n  let sec;\n  if (tag === 'gentime') {\n    year = str.slice(0, 4) | 0;\n    mon = str.slice(4, 6) | 0;\n    day = str.slice(6, 8) | 0;\n    hour = str.slice(8, 10) | 0;\n    min = str.slice(10, 12) | 0;\n    sec = str.slice(12, 14) | 0;\n  } else if (tag === 'utctime') {\n    year = str.slice(0, 2) | 0;\n    mon = str.slice(2, 4) | 0;\n    day = str.slice(4, 6) | 0;\n    hour = str.slice(6, 8) | 0;\n    min = str.slice(8, 10) | 0;\n    sec = str.slice(10, 12) | 0;\n    if (year < 70)\n      year = 2000 + year;\n    else\n      year = 1900 + year;\n  } else {\n    return buffer.error('Decoding ' + tag + ' time is not supported yet');\n  }\n\n  return Date.UTC(year, mon - 1, day, hour, min, sec, 0);\n};\n\nDERNode.prototype._decodeNull = function decodeNull() {\n  return null;\n};\n\nDERNode.prototype._decodeBool = function decodeBool(buffer) {\n  const res = buffer.readUInt8();\n  if (buffer.isError(res))\n    return res;\n  else\n    return res !== 0;\n};\n\nDERNode.prototype._decodeInt = function decodeInt(buffer, values) {\n  // Bigint, return as it is (assume big endian)\n  const raw = buffer.raw();\n  let res = new bignum(raw);\n\n  if (values)\n    res = values[res.toString(10)] || res;\n\n  return res;\n};\n\nDERNode.prototype._use = function use(entity, obj) {\n  if (typeof entity === 'function')\n    entity = entity(obj);\n  return entity._getDecoder('der').tree;\n};\n\n// Utility methods\n\nfunction derDecodeTag(buf, fail) {\n  let tag = buf.readUInt8(fail);\n  if (buf.isError(tag))\n    return tag;\n\n  const cls = der.tagClass[tag >> 6];\n  const primitive = (tag & 0x20) === 0;\n\n  // Multi-octet tag - load\n  if ((tag & 0x1f) === 0x1f) {\n    let oct = tag;\n    tag = 0;\n    while ((oct & 0x80) === 0x80) {\n      oct = buf.readUInt8(fail);\n      if (buf.isError(oct))\n        return oct;\n\n      tag <<= 7;\n      tag |= oct & 0x7f;\n    }\n  } else {\n    tag &= 0x1f;\n  }\n  const tagStr = der.tag[tag];\n\n  return {\n    cls: cls,\n    primitive: primitive,\n    tag: tag,\n    tagStr: tagStr\n  };\n}\n\nfunction derDecodeLen(buf, primitive, fail) {\n  let len = buf.readUInt8(fail);\n  if (buf.isError(len))\n    return len;\n\n  // Indefinite form\n  if (!primitive && len === 0x80)\n    return null;\n\n  // Definite form\n  if ((len & 0x80) === 0) {\n    // Short form\n    return len;\n  }\n\n  // Long form\n  const num = len & 0x7f;\n  if (num > 4)\n    return buf.error('length octect is too long');\n\n  len = 0;\n  for (let i = 0; i < num; i++) {\n    len <<= 8;\n    const j = buf.readUInt8(fail);\n    if (buf.isError(j))\n      return j;\n    len |= j;\n  }\n\n  return len;\n}\n","module.exports = {};\n","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */\n/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */\nvar document = require('global/document');\n\nvar _objCreate = Object.create || (function() {\n  function F() {}\n  return function(o) {\n    if (arguments.length !== 1) {\n      throw new Error('Object.create shim only accepts one parameter.');\n    }\n    F.prototype = o;\n    return new F();\n  };\n})();\n\n// Creates a new ParserError object from an errorData object. The errorData\n// object should have default code and message properties. The default message\n// property can be overriden by passing in a message parameter.\n// See ParsingError.Errors below for acceptable errors.\nfunction ParsingError(errorData, message) {\n  this.name = \"ParsingError\";\n  this.code = errorData.code;\n  this.message = message || errorData.message;\n}\nParsingError.prototype = _objCreate(Error.prototype);\nParsingError.prototype.constructor = ParsingError;\n\n// ParsingError metadata for acceptable ParsingErrors.\nParsingError.Errors = {\n  BadSignature: {\n    code: 0,\n    message: \"Malformed WebVTT signature.\"\n  },\n  BadTimeStamp: {\n    code: 1,\n    message: \"Malformed time stamp.\"\n  }\n};\n\n// Try to parse input as a time stamp.\nfunction parseTimeStamp(input) {\n\n  function computeSeconds(h, m, s, f) {\n    return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;\n  }\n\n  var m = input.match(/^(\\d+):(\\d{1,2})(:\\d{1,2})?\\.(\\d{3})/);\n  if (!m) {\n    return null;\n  }\n\n  if (m[3]) {\n    // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]\n    return computeSeconds(m[1], m[2], m[3].replace(\":\", \"\"), m[4]);\n  } else if (m[1] > 59) {\n    // Timestamp takes the form of [hours]:[minutes].[milliseconds]\n    // First position is hours as it's over 59.\n    return computeSeconds(m[1], m[2], 0,  m[4]);\n  } else {\n    // Timestamp takes the form of [minutes]:[seconds].[milliseconds]\n    return computeSeconds(0, m[1], m[2], m[4]);\n  }\n}\n\n// A settings object holds key/value pairs and will ignore anything but the first\n// assignment to a specific key.\nfunction Settings() {\n  this.values = _objCreate(null);\n}\n\nSettings.prototype = {\n  // Only accept the first assignment to any key.\n  set: function(k, v) {\n    if (!this.get(k) && v !== \"\") {\n      this.values[k] = v;\n    }\n  },\n  // Return the value for a key, or a default value.\n  // If 'defaultKey' is passed then 'dflt' is assumed to be an object with\n  // a number of possible default values as properties where 'defaultKey' is\n  // the key of the property that will be chosen; otherwise it's assumed to be\n  // a single value.\n  get: function(k, dflt, defaultKey) {\n    if (defaultKey) {\n      return this.has(k) ? this.values[k] : dflt[defaultKey];\n    }\n    return this.has(k) ? this.values[k] : dflt;\n  },\n  // Check whether we have a value for a key.\n  has: function(k) {\n    return k in this.values;\n  },\n  // Accept a setting if its one of the given alternatives.\n  alt: function(k, v, a) {\n    for (var n = 0; n < a.length; ++n) {\n      if (v === a[n]) {\n        this.set(k, v);\n        break;\n      }\n    }\n  },\n  // Accept a setting if its a valid (signed) integer.\n  integer: function(k, v) {\n    if (/^-?\\d+$/.test(v)) { // integer\n      this.set(k, parseInt(v, 10));\n    }\n  },\n  // Accept a setting if its a valid percentage.\n  percent: function(k, v) {\n    var m;\n    if ((m = v.match(/^([\\d]{1,3})(\\.[\\d]*)?%$/))) {\n      v = parseFloat(v);\n      if (v >= 0 && v <= 100) {\n        this.set(k, v);\n        return true;\n      }\n    }\n    return false;\n  }\n};\n\n// Helper function to parse input into groups separated by 'groupDelim', and\n// interprete each group as a key/value pair separated by 'keyValueDelim'.\nfunction parseOptions(input, callback, keyValueDelim, groupDelim) {\n  var groups = groupDelim ? input.split(groupDelim) : [input];\n  for (var i in groups) {\n    if (typeof groups[i] !== \"string\") {\n      continue;\n    }\n    var kv = groups[i].split(keyValueDelim);\n    if (kv.length !== 2) {\n      continue;\n    }\n    var k = kv[0].trim();\n    var v = kv[1].trim();\n    callback(k, v);\n  }\n}\n\nfunction parseCue(input, cue, regionList) {\n  // Remember the original input if we need to throw an error.\n  var oInput = input;\n  // 4.1 WebVTT timestamp\n  function consumeTimeStamp() {\n    var ts = parseTimeStamp(input);\n    if (ts === null) {\n      throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                            \"Malformed timestamp: \" + oInput);\n    }\n    // Remove time stamp from input.\n    input = input.replace(/^[^\\sa-zA-Z-]+/, \"\");\n    return ts;\n  }\n\n  // 4.4.2 WebVTT cue settings\n  function consumeCueSettings(input, cue) {\n    var settings = new Settings();\n\n    parseOptions(input, function (k, v) {\n      switch (k) {\n      case \"region\":\n        // Find the last region we parsed with the same region id.\n        for (var i = regionList.length - 1; i >= 0; i--) {\n          if (regionList[i].id === v) {\n            settings.set(k, regionList[i].region);\n            break;\n          }\n        }\n        break;\n      case \"vertical\":\n        settings.alt(k, v, [\"rl\", \"lr\"]);\n        break;\n      case \"line\":\n        var vals = v.split(\",\"),\n            vals0 = vals[0];\n        settings.integer(k, vals0);\n        settings.percent(k, vals0) ? settings.set(\"snapToLines\", false) : null;\n        settings.alt(k, vals0, [\"auto\"]);\n        if (vals.length === 2) {\n          settings.alt(\"lineAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n        }\n        break;\n      case \"position\":\n        vals = v.split(\",\");\n        settings.percent(k, vals[0]);\n        if (vals.length === 2) {\n          settings.alt(\"positionAlign\", vals[1], [\"start\", \"center\", \"end\"]);\n        }\n        break;\n      case \"size\":\n        settings.percent(k, v);\n        break;\n      case \"align\":\n        settings.alt(k, v, [\"start\", \"center\", \"end\", \"left\", \"right\"]);\n        break;\n      }\n    }, /:/, /\\s/);\n\n    // Apply default values for any missing fields.\n    cue.region = settings.get(\"region\", null);\n    cue.vertical = settings.get(\"vertical\", \"\");\n    try {\n      cue.line = settings.get(\"line\", \"auto\");\n    } catch (e) {}\n    cue.lineAlign = settings.get(\"lineAlign\", \"start\");\n    cue.snapToLines = settings.get(\"snapToLines\", true);\n    cue.size = settings.get(\"size\", 100);\n    // Safari still uses the old middle value and won't accept center\n    try {\n      cue.align = settings.get(\"align\", \"center\");\n    } catch (e) {\n      cue.align = settings.get(\"align\", \"middle\");\n    }\n    try {\n      cue.position = settings.get(\"position\", \"auto\");\n    } catch (e) {\n      cue.position = settings.get(\"position\", {\n        start: 0,\n        left: 0,\n        center: 50,\n        middle: 50,\n        end: 100,\n        right: 100\n      }, cue.align);\n    }\n\n\n    cue.positionAlign = settings.get(\"positionAlign\", {\n      start: \"start\",\n      left: \"start\",\n      center: \"center\",\n      middle: \"center\",\n      end: \"end\",\n      right: \"end\"\n    }, cue.align);\n  }\n\n  function skipWhitespace() {\n    input = input.replace(/^\\s+/, \"\");\n  }\n\n  // 4.1 WebVTT cue timings.\n  skipWhitespace();\n  cue.startTime = consumeTimeStamp();   // (1) collect cue start time\n  skipWhitespace();\n  if (input.substr(0, 3) !== \"-->\") {     // (3) next characters must match \"-->\"\n    throw new ParsingError(ParsingError.Errors.BadTimeStamp,\n                           \"Malformed time stamp (time stamps must be separated by '-->'): \" +\n                           oInput);\n  }\n  input = input.substr(3);\n  skipWhitespace();\n  cue.endTime = consumeTimeStamp();     // (5) collect cue end time\n\n  // 4.1 WebVTT cue settings list.\n  skipWhitespace();\n  consumeCueSettings(input, cue);\n}\n\n// When evaluating this file as part of a Webpack bundle for server\n// side rendering, `document` is an empty object.\nvar TEXTAREA_ELEMENT = document.createElement && document.createElement(\"textarea\");\n\nvar TAG_NAME = {\n  c: \"span\",\n  i: \"i\",\n  b: \"b\",\n  u: \"u\",\n  ruby: \"ruby\",\n  rt: \"rt\",\n  v: \"span\",\n  lang: \"span\"\n};\n\n// 5.1 default text color\n// 5.2 default text background color is equivalent to text color with bg_ prefix\nvar DEFAULT_COLOR_CLASS = {\n  white: 'rgba(255,255,255,1)',\n  lime: 'rgba(0,255,0,1)',\n  cyan: 'rgba(0,255,255,1)',\n  red: 'rgba(255,0,0,1)',\n  yellow: 'rgba(255,255,0,1)',\n  magenta: 'rgba(255,0,255,1)',\n  blue: 'rgba(0,0,255,1)',\n  black: 'rgba(0,0,0,1)'\n};\n\nvar TAG_ANNOTATION = {\n  v: \"title\",\n  lang: \"lang\"\n};\n\nvar NEEDS_PARENT = {\n  rt: \"ruby\"\n};\n\n// Parse content into a document fragment.\nfunction parseContent(window, input) {\n  function nextToken() {\n    // Check for end-of-string.\n    if (!input) {\n      return null;\n    }\n\n    // Consume 'n' characters from the input.\n    function consume(result) {\n      input = input.substr(result.length);\n      return result;\n    }\n\n    var m = input.match(/^([^<]*)(<[^>]*>?)?/);\n    // If there is some text before the next tag, return it, otherwise return\n    // the tag.\n    return consume(m[1] ? m[1] : m[2]);\n  }\n\n  function unescape(s) {\n    TEXTAREA_ELEMENT.innerHTML = s;\n    s = TEXTAREA_ELEMENT.textContent;\n    TEXTAREA_ELEMENT.textContent = \"\";\n    return s;\n  }\n\n  function shouldAdd(current, element) {\n    return !NEEDS_PARENT[element.localName] ||\n           NEEDS_PARENT[element.localName] === current.localName;\n  }\n\n  // Create an element for this tag.\n  function createElement(type, annotation) {\n    var tagName = TAG_NAME[type];\n    if (!tagName) {\n      return null;\n    }\n    var element = window.document.createElement(tagName);\n    var name = TAG_ANNOTATION[type];\n    if (name && annotation) {\n      element[name] = annotation.trim();\n    }\n    return element;\n  }\n\n  var rootDiv = window.document.createElement(\"div\"),\n      current = rootDiv,\n      t,\n      tagStack = [];\n\n  while ((t = nextToken()) !== null) {\n    if (t[0] === '<') {\n      if (t[1] === \"/\") {\n        // If the closing tag matches, move back up to the parent node.\n        if (tagStack.length &&\n            tagStack[tagStack.length - 1] === t.substr(2).replace(\">\", \"\")) {\n          tagStack.pop();\n          current = current.parentNode;\n        }\n        // Otherwise just ignore the end tag.\n        continue;\n      }\n      var ts = parseTimeStamp(t.substr(1, t.length - 2));\n      var node;\n      if (ts) {\n        // Timestamps are lead nodes as well.\n        node = window.document.createProcessingInstruction(\"timestamp\", ts);\n        current.appendChild(node);\n        continue;\n      }\n      var m = t.match(/^<([^.\\s/0-9>]+)(\\.[^\\s\\\\>]+)?([^>\\\\]+)?(\\\\?)>?$/);\n      // If we can't parse the tag, skip to the next tag.\n      if (!m) {\n        continue;\n      }\n      // Try to construct an element, and ignore the tag if we couldn't.\n      node = createElement(m[1], m[3]);\n      if (!node) {\n        continue;\n      }\n      // Determine if the tag should be added based on the context of where it\n      // is placed in the cuetext.\n      if (!shouldAdd(current, node)) {\n        continue;\n      }\n      // Set the class list (as a list of classes, separated by space).\n      if (m[2]) {\n        var classes = m[2].split('.');\n\n        classes.forEach(function(cl) {\n          var bgColor = /^bg_/.test(cl);\n          // slice out `bg_` if it's a background color\n          var colorName = bgColor ? cl.slice(3) : cl;\n\n          if (DEFAULT_COLOR_CLASS.hasOwnProperty(colorName)) {\n            var propName = bgColor ? 'background-color' : 'color';\n            var propValue = DEFAULT_COLOR_CLASS[colorName];\n\n            node.style[propName] = propValue;\n          }\n        });\n\n        node.className = classes.join(' ');\n      }\n      // Append the node to the current node, and enter the scope of the new\n      // node.\n      tagStack.push(m[1]);\n      current.appendChild(node);\n      current = node;\n      continue;\n    }\n\n    // Text nodes are leaf nodes.\n    current.appendChild(window.document.createTextNode(unescape(t)));\n  }\n\n  return rootDiv;\n}\n\n// This is a list of all the Unicode characters that have a strong\n// right-to-left category. What this means is that these characters are\n// written right-to-left for sure. It was generated by pulling all the strong\n// right-to-left characters out of the Unicode data table. That table can\n// found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt\nvar strongRTLRanges = [[0x5be, 0x5be], [0x5c0, 0x5c0], [0x5c3, 0x5c3], [0x5c6, 0x5c6],\n [0x5d0, 0x5ea], [0x5f0, 0x5f4], [0x608, 0x608], [0x60b, 0x60b], [0x60d, 0x60d],\n [0x61b, 0x61b], [0x61e, 0x64a], [0x66d, 0x66f], [0x671, 0x6d5], [0x6e5, 0x6e6],\n [0x6ee, 0x6ef], [0x6fa, 0x70d], [0x70f, 0x710], [0x712, 0x72f], [0x74d, 0x7a5],\n [0x7b1, 0x7b1], [0x7c0, 0x7ea], [0x7f4, 0x7f5], [0x7fa, 0x7fa], [0x800, 0x815],\n [0x81a, 0x81a], [0x824, 0x824], [0x828, 0x828], [0x830, 0x83e], [0x840, 0x858],\n [0x85e, 0x85e], [0x8a0, 0x8a0], [0x8a2, 0x8ac], [0x200f, 0x200f],\n [0xfb1d, 0xfb1d], [0xfb1f, 0xfb28], [0xfb2a, 0xfb36], [0xfb38, 0xfb3c],\n [0xfb3e, 0xfb3e], [0xfb40, 0xfb41], [0xfb43, 0xfb44], [0xfb46, 0xfbc1],\n [0xfbd3, 0xfd3d], [0xfd50, 0xfd8f], [0xfd92, 0xfdc7], [0xfdf0, 0xfdfc],\n [0xfe70, 0xfe74], [0xfe76, 0xfefc], [0x10800, 0x10805], [0x10808, 0x10808],\n [0x1080a, 0x10835], [0x10837, 0x10838], [0x1083c, 0x1083c], [0x1083f, 0x10855],\n [0x10857, 0x1085f], [0x10900, 0x1091b], [0x10920, 0x10939], [0x1093f, 0x1093f],\n [0x10980, 0x109b7], [0x109be, 0x109bf], [0x10a00, 0x10a00], [0x10a10, 0x10a13],\n [0x10a15, 0x10a17], [0x10a19, 0x10a33], [0x10a40, 0x10a47], [0x10a50, 0x10a58],\n [0x10a60, 0x10a7f], [0x10b00, 0x10b35], [0x10b40, 0x10b55], [0x10b58, 0x10b72],\n [0x10b78, 0x10b7f], [0x10c00, 0x10c48], [0x1ee00, 0x1ee03], [0x1ee05, 0x1ee1f],\n [0x1ee21, 0x1ee22], [0x1ee24, 0x1ee24], [0x1ee27, 0x1ee27], [0x1ee29, 0x1ee32],\n [0x1ee34, 0x1ee37], [0x1ee39, 0x1ee39], [0x1ee3b, 0x1ee3b], [0x1ee42, 0x1ee42],\n [0x1ee47, 0x1ee47], [0x1ee49, 0x1ee49], [0x1ee4b, 0x1ee4b], [0x1ee4d, 0x1ee4f],\n [0x1ee51, 0x1ee52], [0x1ee54, 0x1ee54], [0x1ee57, 0x1ee57], [0x1ee59, 0x1ee59],\n [0x1ee5b, 0x1ee5b], [0x1ee5d, 0x1ee5d], [0x1ee5f, 0x1ee5f], [0x1ee61, 0x1ee62],\n [0x1ee64, 0x1ee64], [0x1ee67, 0x1ee6a], [0x1ee6c, 0x1ee72], [0x1ee74, 0x1ee77],\n [0x1ee79, 0x1ee7c], [0x1ee7e, 0x1ee7e], [0x1ee80, 0x1ee89], [0x1ee8b, 0x1ee9b],\n [0x1eea1, 0x1eea3], [0x1eea5, 0x1eea9], [0x1eeab, 0x1eebb], [0x10fffd, 0x10fffd]];\n\nfunction isStrongRTLChar(charCode) {\n  for (var i = 0; i < strongRTLRanges.length; i++) {\n    var currentRange = strongRTLRanges[i];\n    if (charCode >= currentRange[0] && charCode <= currentRange[1]) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nfunction determineBidi(cueDiv) {\n  var nodeStack = [],\n      text = \"\",\n      charCode;\n\n  if (!cueDiv || !cueDiv.childNodes) {\n    return \"ltr\";\n  }\n\n  function pushNodes(nodeStack, node) {\n    for (var i = node.childNodes.length - 1; i >= 0; i--) {\n      nodeStack.push(node.childNodes[i]);\n    }\n  }\n\n  function nextTextNode(nodeStack) {\n    if (!nodeStack || !nodeStack.length) {\n      return null;\n    }\n\n    var node = nodeStack.pop(),\n        text = node.textContent || node.innerText;\n    if (text) {\n      // TODO: This should match all unicode type B characters (paragraph\n      // separator characters). See issue #115.\n      var m = text.match(/^.*(\\n|\\r)/);\n      if (m) {\n        nodeStack.length = 0;\n        return m[0];\n      }\n      return text;\n    }\n    if (node.tagName === \"ruby\") {\n      return nextTextNode(nodeStack);\n    }\n    if (node.childNodes) {\n      pushNodes(nodeStack, node);\n      return nextTextNode(nodeStack);\n    }\n  }\n\n  pushNodes(nodeStack, cueDiv);\n  while ((text = nextTextNode(nodeStack))) {\n    for (var i = 0; i < text.length; i++) {\n      charCode = text.charCodeAt(i);\n      if (isStrongRTLChar(charCode)) {\n        return \"rtl\";\n      }\n    }\n  }\n  return \"ltr\";\n}\n\nfunction computeLinePos(cue) {\n  if (typeof cue.line === \"number\" &&\n      (cue.snapToLines || (cue.line >= 0 && cue.line <= 100))) {\n    return cue.line;\n  }\n  if (!cue.track || !cue.track.textTrackList ||\n      !cue.track.textTrackList.mediaElement) {\n    return -1;\n  }\n  var track = cue.track,\n      trackList = track.textTrackList,\n      count = 0;\n  for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {\n    if (trackList[i].mode === \"showing\") {\n      count++;\n    }\n  }\n  return ++count * -1;\n}\n\nfunction StyleBox() {\n}\n\n// Apply styles to a div. If there is no div passed then it defaults to the\n// div on 'this'.\nStyleBox.prototype.applyStyles = function(styles, div) {\n  div = div || this.div;\n  for (var prop in styles) {\n    if (styles.hasOwnProperty(prop)) {\n      div.style[prop] = styles[prop];\n    }\n  }\n};\n\nStyleBox.prototype.formatStyle = function(val, unit) {\n  return val === 0 ? 0 : val + unit;\n};\n\n// Constructs the computed display state of the cue (a div). Places the div\n// into the overlay which should be a block level element (usually a div).\nfunction CueStyleBox(window, cue, styleOptions) {\n  StyleBox.call(this);\n  this.cue = cue;\n\n  // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will\n  // have inline positioning and will function as the cue background box.\n  this.cueDiv = parseContent(window, cue.text);\n  var styles = {\n    color: \"rgba(255, 255, 255, 1)\",\n    backgroundColor:  \"rgba(0, 0, 0, 0.8)\",\n    position: \"relative\",\n    left: 0,\n    right: 0,\n    top: 0,\n    bottom: 0,\n    display: \"inline\",\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\"\n                                     : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                             : \"vertical-rl\",\n    unicodeBidi: \"plaintext\"\n  };\n\n  this.applyStyles(styles, this.cueDiv);\n\n  // Create an absolutely positioned div that will be used to position the cue\n  // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS\n  // mirrors of them except middle instead of center on Safari.\n  this.div = window.document.createElement(\"div\");\n  styles = {\n    direction: determineBidi(this.cueDiv),\n    writingMode: cue.vertical === \"\" ? \"horizontal-tb\"\n                                     : cue.vertical === \"lr\" ? \"vertical-lr\"\n                                                             : \"vertical-rl\",\n    unicodeBidi: \"plaintext\",\n    textAlign: cue.align === \"middle\" ? \"center\" : cue.align,\n    font: styleOptions.font,\n    whiteSpace: \"pre-line\",\n    position: \"absolute\"\n  };\n\n  this.applyStyles(styles);\n  this.div.appendChild(this.cueDiv);\n\n  // Calculate the distance from the reference edge of the viewport to the text\n  // position of the cue box. The reference edge will be resolved later when\n  // the box orientation styles are applied.\n  var textPos = 0;\n  switch (cue.positionAlign) {\n  case \"start\":\n  case \"line-left\":\n    textPos = cue.position;\n    break;\n  case \"center\":\n    textPos = cue.position - (cue.size / 2);\n    break;\n  case \"end\":\n  case \"line-right\":\n    textPos = cue.position - cue.size;\n    break;\n  }\n\n  // Horizontal box orientation; textPos is the distance from the left edge of the\n  // area to the left edge of the box and cue.size is the distance extending to\n  // the right from there.\n  if (cue.vertical === \"\") {\n    this.applyStyles({\n      left:  this.formatStyle(textPos, \"%\"),\n      width: this.formatStyle(cue.size, \"%\")\n    });\n  // Vertical box orientation; textPos is the distance from the top edge of the\n  // area to the top edge of the box and cue.size is the height extending\n  // downwards from there.\n  } else {\n    this.applyStyles({\n      top: this.formatStyle(textPos, \"%\"),\n      height: this.formatStyle(cue.size, \"%\")\n    });\n  }\n\n  this.move = function(box) {\n    this.applyStyles({\n      top: this.formatStyle(box.top, \"px\"),\n      bottom: this.formatStyle(box.bottom, \"px\"),\n      left: this.formatStyle(box.left, \"px\"),\n      right: this.formatStyle(box.right, \"px\"),\n      height: this.formatStyle(box.height, \"px\"),\n      width: this.formatStyle(box.width, \"px\")\n    });\n  };\n}\nCueStyleBox.prototype = _objCreate(StyleBox.prototype);\nCueStyleBox.prototype.constructor = CueStyleBox;\n\n// Represents the co-ordinates of an Element in a way that we can easily\n// compute things with such as if it overlaps or intersects with another Element.\n// Can initialize it with either a StyleBox or another BoxPosition.\nfunction BoxPosition(obj) {\n  // Either a BoxPosition was passed in and we need to copy it, or a StyleBox\n  // was passed in and we need to copy the results of 'getBoundingClientRect'\n  // as the object returned is readonly. All co-ordinate values are in reference\n  // to the viewport origin (top left).\n  var lh, height, width, top;\n  if (obj.div) {\n    height = obj.div.offsetHeight;\n    width = obj.div.offsetWidth;\n    top = obj.div.offsetTop;\n\n    var rects = (rects = obj.div.childNodes) && (rects = rects[0]) &&\n                rects.getClientRects && rects.getClientRects();\n    obj = obj.div.getBoundingClientRect();\n    // In certain cases the outter div will be slightly larger then the sum of\n    // the inner div's lines. This could be due to bold text, etc, on some platforms.\n    // In this case we should get the average line height and use that. This will\n    // result in the desired behaviour.\n    lh = rects ? Math.max((rects[0] && rects[0].height) || 0, obj.height / rects.length)\n               : 0;\n\n  }\n  this.left = obj.left;\n  this.right = obj.right;\n  this.top = obj.top || top;\n  this.height = obj.height || height;\n  this.bottom = obj.bottom || (top + (obj.height || height));\n  this.width = obj.width || width;\n  this.lineHeight = lh !== undefined ? lh : obj.lineHeight;\n}\n\n// Move the box along a particular axis. Optionally pass in an amount to move\n// the box. If no amount is passed then the default is the line height of the\n// box.\nBoxPosition.prototype.move = function(axis, toMove) {\n  toMove = toMove !== undefined ? toMove : this.lineHeight;\n  switch (axis) {\n  case \"+x\":\n    this.left += toMove;\n    this.right += toMove;\n    break;\n  case \"-x\":\n    this.left -= toMove;\n    this.right -= toMove;\n    break;\n  case \"+y\":\n    this.top += toMove;\n    this.bottom += toMove;\n    break;\n  case \"-y\":\n    this.top -= toMove;\n    this.bottom -= toMove;\n    break;\n  }\n};\n\n// Check if this box overlaps another box, b2.\nBoxPosition.prototype.overlaps = function(b2) {\n  return this.left < b2.right &&\n         this.right > b2.left &&\n         this.top < b2.bottom &&\n         this.bottom > b2.top;\n};\n\n// Check if this box overlaps any other boxes in boxes.\nBoxPosition.prototype.overlapsAny = function(boxes) {\n  for (var i = 0; i < boxes.length; i++) {\n    if (this.overlaps(boxes[i])) {\n      return true;\n    }\n  }\n  return false;\n};\n\n// Check if this box is within another box.\nBoxPosition.prototype.within = function(container) {\n  return this.top >= container.top &&\n         this.bottom <= container.bottom &&\n         this.left >= container.left &&\n         this.right <= container.right;\n};\n\n// Check if this box is entirely within the container or it is overlapping\n// on the edge opposite of the axis direction passed. For example, if \"+x\" is\n// passed and the box is overlapping on the left edge of the container, then\n// return true.\nBoxPosition.prototype.overlapsOppositeAxis = function(container, axis) {\n  switch (axis) {\n  case \"+x\":\n    return this.left < container.left;\n  case \"-x\":\n    return this.right > container.right;\n  case \"+y\":\n    return this.top < container.top;\n  case \"-y\":\n    return this.bottom > container.bottom;\n  }\n};\n\n// Find the percentage of the area that this box is overlapping with another\n// box.\nBoxPosition.prototype.intersectPercentage = function(b2) {\n  var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),\n      y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),\n      intersectArea = x * y;\n  return intersectArea / (this.height * this.width);\n};\n\n// Convert the positions from this box to CSS compatible positions using\n// the reference container's positions. This has to be done because this\n// box's positions are in reference to the viewport origin, whereas, CSS\n// values are in referecne to their respective edges.\nBoxPosition.prototype.toCSSCompatValues = function(reference) {\n  return {\n    top: this.top - reference.top,\n    bottom: reference.bottom - this.bottom,\n    left: this.left - reference.left,\n    right: reference.right - this.right,\n    height: this.height,\n    width: this.width\n  };\n};\n\n// Get an object that represents the box's position without anything extra.\n// Can pass a StyleBox, HTMLElement, or another BoxPositon.\nBoxPosition.getSimpleBoxPosition = function(obj) {\n  var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;\n  var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;\n  var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;\n\n  obj = obj.div ? obj.div.getBoundingClientRect() :\n                obj.tagName ? obj.getBoundingClientRect() : obj;\n  var ret = {\n    left: obj.left,\n    right: obj.right,\n    top: obj.top || top,\n    height: obj.height || height,\n    bottom: obj.bottom || (top + (obj.height || height)),\n    width: obj.width || width\n  };\n  return ret;\n};\n\n// Move a StyleBox to its specified, or next best, position. The containerBox\n// is the box that contains the StyleBox, such as a div. boxPositions are\n// a list of other boxes that the styleBox can't overlap with.\nfunction moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {\n\n  // Find the best position for a cue box, b, on the video. The axis parameter\n  // is a list of axis, the order of which, it will move the box along. For example:\n  // Passing [\"+x\", \"-x\"] will move the box first along the x axis in the positive\n  // direction. If it doesn't find a good position for it there it will then move\n  // it along the x axis in the negative direction.\n  function findBestPosition(b, axis) {\n    var bestPosition,\n        specifiedPosition = new BoxPosition(b),\n        percentage = 1; // Highest possible so the first thing we get is better.\n\n    for (var i = 0; i < axis.length; i++) {\n      while (b.overlapsOppositeAxis(containerBox, axis[i]) ||\n             (b.within(containerBox) && b.overlapsAny(boxPositions))) {\n        b.move(axis[i]);\n      }\n      // We found a spot where we aren't overlapping anything. This is our\n      // best position.\n      if (b.within(containerBox)) {\n        return b;\n      }\n      var p = b.intersectPercentage(containerBox);\n      // If we're outside the container box less then we were on our last try\n      // then remember this position as the best position.\n      if (percentage > p) {\n        bestPosition = new BoxPosition(b);\n        percentage = p;\n      }\n      // Reset the box position to the specified position.\n      b = new BoxPosition(specifiedPosition);\n    }\n    return bestPosition || specifiedPosition;\n  }\n\n  var boxPosition = new BoxPosition(styleBox),\n      cue = styleBox.cue,\n      linePos = computeLinePos(cue),\n      axis = [];\n\n  // If we have a line number to align the cue to.\n  if (cue.snapToLines) {\n    var size;\n    switch (cue.vertical) {\n    case \"\":\n      axis = [ \"+y\", \"-y\" ];\n      size = \"height\";\n      break;\n    case \"rl\":\n      axis = [ \"+x\", \"-x\" ];\n      size = \"width\";\n      break;\n    case \"lr\":\n      axis = [ \"-x\", \"+x\" ];\n      size = \"width\";\n      break;\n    }\n\n    var step = boxPosition.lineHeight,\n        position = step * Math.round(linePos),\n        maxPosition = containerBox[size] + step,\n        initialAxis = axis[0];\n\n    // If the specified intial position is greater then the max position then\n    // clamp the box to the amount of steps it would take for the box to\n    // reach the max position.\n    if (Math.abs(position) > maxPosition) {\n      position = position < 0 ? -1 : 1;\n      position *= Math.ceil(maxPosition / step) * step;\n    }\n\n    // If computed line position returns negative then line numbers are\n    // relative to the bottom of the video instead of the top. Therefore, we\n    // need to increase our initial position by the length or width of the\n    // video, depending on the writing direction, and reverse our axis directions.\n    if (linePos < 0) {\n      position += cue.vertical === \"\" ? containerBox.height : containerBox.width;\n      axis = axis.reverse();\n    }\n\n    // Move the box to the specified position. This may not be its best\n    // position.\n    boxPosition.move(initialAxis, position);\n\n  } else {\n    // If we have a percentage line value for the cue.\n    var calculatedPercentage = (boxPosition.lineHeight / containerBox.height) * 100;\n\n    switch (cue.lineAlign) {\n    case \"center\":\n      linePos -= (calculatedPercentage / 2);\n      break;\n    case \"end\":\n      linePos -= calculatedPercentage;\n      break;\n    }\n\n    // Apply initial line position to the cue box.\n    switch (cue.vertical) {\n    case \"\":\n      styleBox.applyStyles({\n        top: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"rl\":\n      styleBox.applyStyles({\n        left: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    case \"lr\":\n      styleBox.applyStyles({\n        right: styleBox.formatStyle(linePos, \"%\")\n      });\n      break;\n    }\n\n    axis = [ \"+y\", \"-x\", \"+x\", \"-y\" ];\n\n    // Get the box position again after we've applied the specified positioning\n    // to it.\n    boxPosition = new BoxPosition(styleBox);\n  }\n\n  var bestPosition = findBestPosition(boxPosition, axis);\n  styleBox.move(bestPosition.toCSSCompatValues(containerBox));\n}\n\nfunction WebVTT() {\n  // Nothing\n}\n\n// Helper to allow strings to be decoded instead of the default binary utf8 data.\nWebVTT.StringDecoder = function() {\n  return {\n    decode: function(data) {\n      if (!data) {\n        return \"\";\n      }\n      if (typeof data !== \"string\") {\n        throw new Error(\"Error - expected string data.\");\n      }\n      return decodeURIComponent(encodeURIComponent(data));\n    }\n  };\n};\n\nWebVTT.convertCueToDOMTree = function(window, cuetext) {\n  if (!window || !cuetext) {\n    return null;\n  }\n  return parseContent(window, cuetext);\n};\n\nvar FONT_SIZE_PERCENT = 0.05;\nvar FONT_STYLE = \"sans-serif\";\nvar CUE_BACKGROUND_PADDING = \"1.5%\";\n\n// Runs the processing model over the cues and regions passed to it.\n// @param overlay A block level element (usually a div) that the computed cues\n//                and regions will be placed into.\nWebVTT.processCues = function(window, cues, overlay) {\n  if (!window || !cues || !overlay) {\n    return null;\n  }\n\n  // Remove all previous children.\n  while (overlay.firstChild) {\n    overlay.removeChild(overlay.firstChild);\n  }\n\n  var paddedOverlay = window.document.createElement(\"div\");\n  paddedOverlay.style.position = \"absolute\";\n  paddedOverlay.style.left = \"0\";\n  paddedOverlay.style.right = \"0\";\n  paddedOverlay.style.top = \"0\";\n  paddedOverlay.style.bottom = \"0\";\n  paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;\n  overlay.appendChild(paddedOverlay);\n\n  // Determine if we need to compute the display states of the cues. This could\n  // be the case if a cue's state has been changed since the last computation or\n  // if it has not been computed yet.\n  function shouldCompute(cues) {\n    for (var i = 0; i < cues.length; i++) {\n      if (cues[i].hasBeenReset || !cues[i].displayState) {\n        return true;\n      }\n    }\n    return false;\n  }\n\n  // We don't need to recompute the cues' display states. Just reuse them.\n  if (!shouldCompute(cues)) {\n    for (var i = 0; i < cues.length; i++) {\n      paddedOverlay.appendChild(cues[i].displayState);\n    }\n    return;\n  }\n\n  var boxPositions = [],\n      containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),\n      fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;\n  var styleOptions = {\n    font: fontSize + \"px \" + FONT_STYLE\n  };\n\n  (function() {\n    var styleBox, cue;\n\n    for (var i = 0; i < cues.length; i++) {\n      cue = cues[i];\n\n      // Compute the intial position and styles of the cue div.\n      styleBox = new CueStyleBox(window, cue, styleOptions);\n      paddedOverlay.appendChild(styleBox.div);\n\n      // Move the cue div to it's correct line position.\n      moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);\n\n      // Remember the computed div so that we don't have to recompute it later\n      // if we don't have too.\n      cue.displayState = styleBox.div;\n\n      boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));\n    }\n  })();\n};\n\nWebVTT.Parser = function(window, vttjs, decoder) {\n  if (!decoder) {\n    decoder = vttjs;\n    vttjs = {};\n  }\n  if (!vttjs) {\n    vttjs = {};\n  }\n\n  this.window = window;\n  this.vttjs = vttjs;\n  this.state = \"INITIAL\";\n  this.buffer = \"\";\n  this.decoder = decoder || new TextDecoder(\"utf8\");\n  this.regionList = [];\n};\n\nWebVTT.Parser.prototype = {\n  // If the error is a ParsingError then report it to the consumer if\n  // possible. If it's not a ParsingError then throw it like normal.\n  reportOrThrowError: function(e) {\n    if (e instanceof ParsingError) {\n      this.onparsingerror && this.onparsingerror(e);\n    } else {\n      throw e;\n    }\n  },\n  parse: function (data) {\n    var self = this;\n\n    // If there is no data then we won't decode it, but will just try to parse\n    // whatever is in buffer already. This may occur in circumstances, for\n    // example when flush() is called.\n    if (data) {\n      // Try to decode the data that we received.\n      self.buffer += self.decoder.decode(data, {stream: true});\n    }\n\n    function collectNextLine() {\n      var buffer = self.buffer;\n      var pos = 0;\n      while (pos < buffer.length && buffer[pos] !== '\\r' && buffer[pos] !== '\\n') {\n        ++pos;\n      }\n      var line = buffer.substr(0, pos);\n      // Advance the buffer early in case we fail below.\n      if (buffer[pos] === '\\r') {\n        ++pos;\n      }\n      if (buffer[pos] === '\\n') {\n        ++pos;\n      }\n      self.buffer = buffer.substr(pos);\n      return line;\n    }\n\n    // 3.4 WebVTT region and WebVTT region settings syntax\n    function parseRegion(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function (k, v) {\n        switch (k) {\n        case \"id\":\n          settings.set(k, v);\n          break;\n        case \"width\":\n          settings.percent(k, v);\n          break;\n        case \"lines\":\n          settings.integer(k, v);\n          break;\n        case \"regionanchor\":\n        case \"viewportanchor\":\n          var xy = v.split(',');\n          if (xy.length !== 2) {\n            break;\n          }\n          // We have to make sure both x and y parse, so use a temporary\n          // settings object here.\n          var anchor = new Settings();\n          anchor.percent(\"x\", xy[0]);\n          anchor.percent(\"y\", xy[1]);\n          if (!anchor.has(\"x\") || !anchor.has(\"y\")) {\n            break;\n          }\n          settings.set(k + \"X\", anchor.get(\"x\"));\n          settings.set(k + \"Y\", anchor.get(\"y\"));\n          break;\n        case \"scroll\":\n          settings.alt(k, v, [\"up\"]);\n          break;\n        }\n      }, /=/, /\\s/);\n\n      // Create the region, using default values for any values that were not\n      // specified.\n      if (settings.has(\"id\")) {\n        var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();\n        region.width = settings.get(\"width\", 100);\n        region.lines = settings.get(\"lines\", 3);\n        region.regionAnchorX = settings.get(\"regionanchorX\", 0);\n        region.regionAnchorY = settings.get(\"regionanchorY\", 100);\n        region.viewportAnchorX = settings.get(\"viewportanchorX\", 0);\n        region.viewportAnchorY = settings.get(\"viewportanchorY\", 100);\n        region.scroll = settings.get(\"scroll\", \"\");\n        // Register the region.\n        self.onregion && self.onregion(region);\n        // Remember the VTTRegion for later in case we parse any VTTCues that\n        // reference it.\n        self.regionList.push({\n          id: settings.get(\"id\"),\n          region: region\n        });\n      }\n    }\n\n    // draft-pantos-http-live-streaming-20\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-20#section-3.5\n    // 3.5 WebVTT\n    function parseTimestampMap(input) {\n      var settings = new Settings();\n\n      parseOptions(input, function(k, v) {\n        switch(k) {\n        case \"MPEGT\":\n          settings.integer(k + 'S', v);\n          break;\n        case \"LOCA\":\n          settings.set(k + 'L', parseTimeStamp(v));\n          break;\n        }\n      }, /[^\\d]:/, /,/);\n\n      self.ontimestampmap && self.ontimestampmap({\n        \"MPEGTS\": settings.get(\"MPEGTS\"),\n        \"LOCAL\": settings.get(\"LOCAL\")\n      });\n    }\n\n    // 3.2 WebVTT metadata header syntax\n    function parseHeader(input) {\n      if (input.match(/X-TIMESTAMP-MAP/)) {\n        // This line contains HLS X-TIMESTAMP-MAP metadata\n        parseOptions(input, function(k, v) {\n          switch(k) {\n          case \"X-TIMESTAMP-MAP\":\n            parseTimestampMap(v);\n            break;\n          }\n        }, /=/);\n      } else {\n        parseOptions(input, function (k, v) {\n          switch (k) {\n          case \"Region\":\n            // 3.3 WebVTT region metadata header syntax\n            parseRegion(v);\n            break;\n          }\n        }, /:/);\n      }\n\n    }\n\n    // 5.1 WebVTT file parsing.\n    try {\n      var line;\n      if (self.state === \"INITIAL\") {\n        // We can't start parsing until we have the first line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        line = collectNextLine();\n\n        var m = line.match(/^WEBVTT([ \\t].*)?$/);\n        if (!m || !m[0]) {\n          throw new ParsingError(ParsingError.Errors.BadSignature);\n        }\n\n        self.state = \"HEADER\";\n      }\n\n      var alreadyCollectedLine = false;\n      while (self.buffer) {\n        // We can't parse a line until we have the full line.\n        if (!/\\r\\n|\\n/.test(self.buffer)) {\n          return this;\n        }\n\n        if (!alreadyCollectedLine) {\n          line = collectNextLine();\n        } else {\n          alreadyCollectedLine = false;\n        }\n\n        switch (self.state) {\n        case \"HEADER\":\n          // 13-18 - Allow a header (metadata) under the WEBVTT line.\n          if (/:/.test(line)) {\n            parseHeader(line);\n          } else if (!line) {\n            // An empty line terminates the header and starts the body (cues).\n            self.state = \"ID\";\n          }\n          continue;\n        case \"NOTE\":\n          // Ignore NOTE blocks.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        case \"ID\":\n          // Check for the start of NOTE blocks.\n          if (/^NOTE($|[ \\t])/.test(line)) {\n            self.state = \"NOTE\";\n            break;\n          }\n          // 19-29 - Allow any number of line terminators, then initialize new cue values.\n          if (!line) {\n            continue;\n          }\n          self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, \"\");\n          // Safari still uses the old middle value and won't accept center\n          try {\n            self.cue.align = \"center\";\n          } catch (e) {\n            self.cue.align = \"middle\";\n          }\n          self.state = \"CUE\";\n          // 30-39 - Check if self line contains an optional identifier or timing data.\n          if (line.indexOf(\"-->\") === -1) {\n            self.cue.id = line;\n            continue;\n          }\n          // Process line as start of a cue.\n          /*falls through*/\n        case \"CUE\":\n          // 40 - Collect cue timings and settings.\n          try {\n            parseCue(line, self.cue, self.regionList);\n          } catch (e) {\n            self.reportOrThrowError(e);\n            // In case of an error ignore rest of the cue.\n            self.cue = null;\n            self.state = \"BADCUE\";\n            continue;\n          }\n          self.state = \"CUETEXT\";\n          continue;\n        case \"CUETEXT\":\n          var hasSubstring = line.indexOf(\"-->\") !== -1;\n          // 34 - If we have an empty line then report the cue.\n          // 35 - If we have the special substring '-->' then report the cue,\n          // but do not collect the line as we need to process the current\n          // one as a new cue.\n          if (!line || hasSubstring && (alreadyCollectedLine = true)) {\n            // We are done parsing self cue.\n            self.oncue && self.oncue(self.cue);\n            self.cue = null;\n            self.state = \"ID\";\n            continue;\n          }\n          if (self.cue.text) {\n            self.cue.text += \"\\n\";\n          }\n          self.cue.text += line.replace(/\\u2028/g, '\\n').replace(/u2029/g, '\\n');\n          continue;\n        case \"BADCUE\": // BADCUE\n          // 54-62 - Collect and discard the remaining cue.\n          if (!line) {\n            self.state = \"ID\";\n          }\n          continue;\n        }\n      }\n    } catch (e) {\n      self.reportOrThrowError(e);\n\n      // If we are currently parsing a cue, report what we have.\n      if (self.state === \"CUETEXT\" && self.cue && self.oncue) {\n        self.oncue(self.cue);\n      }\n      self.cue = null;\n      // Enter BADWEBVTT state if header was not parsed correctly otherwise\n      // another exception occurred so enter BADCUE state.\n      self.state = self.state === \"INITIAL\" ? \"BADWEBVTT\" : \"BADCUE\";\n    }\n    return this;\n  },\n  flush: function () {\n    var self = this;\n    try {\n      // Finish decoding the stream.\n      self.buffer += self.decoder.decode();\n      // Synthesize the end of the current cue or region.\n      if (self.cue || self.state === \"HEADER\") {\n        self.buffer += \"\\n\\n\";\n        self.parse();\n      }\n      // If we've flushed, parsed, and we're still on the INITIAL state then\n      // that means we don't have enough of the stream to parse the first\n      // line.\n      if (self.state === \"INITIAL\") {\n        throw new ParsingError(ParsingError.Errors.BadSignature);\n      }\n    } catch(e) {\n      self.reportOrThrowError(e);\n    }\n    self.onflush && self.onflush();\n    return this;\n  }\n};\n\nmodule.exports = WebVTT;\n","module.exports = function (exec) {\n  try {\n    return !!exec();\n  } catch (error) {\n    return true;\n  }\n};\n","var path = require('../internals/path');\nvar global = require('../internals/global');\n\nvar aFunction = function (variable) {\n  return typeof variable == 'function' ? variable : undefined;\n};\n\nmodule.exports = function (namespace, method) {\n  return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global[namespace])\n    : path[namespace] && path[namespace][method] || global[namespace] && global[namespace][method];\n};\n","'use strict';\n\nfunction _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }\n\nvar codes = {};\n\nfunction createErrorType(code, message, Base) {\n  if (!Base) {\n    Base = Error;\n  }\n\n  function getMessage(arg1, arg2, arg3) {\n    if (typeof message === 'string') {\n      return message;\n    } else {\n      return message(arg1, arg2, arg3);\n    }\n  }\n\n  var NodeError =\n  /*#__PURE__*/\n  function (_Base) {\n    _inheritsLoose(NodeError, _Base);\n\n    function NodeError(arg1, arg2, arg3) {\n      return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;\n    }\n\n    return NodeError;\n  }(Base);\n\n  NodeError.prototype.name = Base.name;\n  NodeError.prototype.code = code;\n  codes[code] = NodeError;\n} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js\n\n\nfunction oneOf(expected, thing) {\n  if (Array.isArray(expected)) {\n    var len = expected.length;\n    expected = expected.map(function (i) {\n      return String(i);\n    });\n\n    if (len > 2) {\n      return \"one of \".concat(thing, \" \").concat(expected.slice(0, len - 1).join(', '), \", or \") + expected[len - 1];\n    } else if (len === 2) {\n      return \"one of \".concat(thing, \" \").concat(expected[0], \" or \").concat(expected[1]);\n    } else {\n      return \"of \".concat(thing, \" \").concat(expected[0]);\n    }\n  } else {\n    return \"of \".concat(thing, \" \").concat(String(expected));\n  }\n} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith\n\n\nfunction startsWith(str, search, pos) {\n  return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;\n} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith\n\n\nfunction endsWith(str, search, this_len) {\n  if (this_len === undefined || this_len > str.length) {\n    this_len = str.length;\n  }\n\n  return str.substring(this_len - search.length, this_len) === search;\n} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes\n\n\nfunction includes(str, search, start) {\n  if (typeof start !== 'number') {\n    start = 0;\n  }\n\n  if (start + search.length > str.length) {\n    return false;\n  } else {\n    return str.indexOf(search, start) !== -1;\n  }\n}\n\ncreateErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {\n  return 'The value \"' + value + '\" is invalid for option \"' + name + '\"';\n}, TypeError);\ncreateErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {\n  // determiner: 'must be' or 'must not be'\n  var determiner;\n\n  if (typeof expected === 'string' && startsWith(expected, 'not ')) {\n    determiner = 'must not be';\n    expected = expected.replace(/^not /, '');\n  } else {\n    determiner = 'must be';\n  }\n\n  var msg;\n\n  if (endsWith(name, ' argument')) {\n    // For cases like 'first argument'\n    msg = \"The \".concat(name, \" \").concat(determiner, \" \").concat(oneOf(expected, 'type'));\n  } else {\n    var type = includes(name, '.') ? 'property' : 'argument';\n    msg = \"The \\\"\".concat(name, \"\\\" \").concat(type, \" \").concat(determiner, \" \").concat(oneOf(expected, 'type'));\n  }\n\n  msg += \". Received type \".concat(typeof actual);\n  return msg;\n}, TypeError);\ncreateErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');\ncreateErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {\n  return 'The ' + name + ' method is not implemented';\n});\ncreateErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');\ncreateErrorType('ERR_STREAM_DESTROYED', function (name) {\n  return 'Cannot call ' + name + ' after a stream was destroyed';\n});\ncreateErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');\ncreateErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');\ncreateErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');\ncreateErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);\ncreateErrorType('ERR_UNKNOWN_ENCODING', function (arg) {\n  return 'Unknown encoding: ' + arg;\n}, TypeError);\ncreateErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');\nmodule.exports.codes = codes;\n","// see https://tools.ietf.org/html/rfc1808\n\n(function (root) {\n  var URL_REGEX =\n    /^(?=((?:[a-zA-Z0-9+\\-.]+:)?))\\1(?=((?:\\/\\/[^\\/?#]*)?))\\2(?=((?:(?:[^?#\\/]*\\/)*[^;?#\\/]*)?))\\3((?:;[^?#]*)?)(\\?[^#]*)?(#[^]*)?$/;\n  var FIRST_SEGMENT_REGEX = /^(?=([^\\/?#]*))\\1([^]*)$/;\n  var SLASH_DOT_REGEX = /(?:\\/|^)\\.(?=\\/)/g;\n  var SLASH_DOT_DOT_REGEX = /(?:\\/|^)\\.\\.\\/(?!\\.\\.\\/)[^\\/]*(?=\\/)/g;\n\n  var URLToolkit = {\n    // If opts.alwaysNormalize is true then the path will always be normalized even when it starts with / or //\n    // E.g\n    // With opts.alwaysNormalize = false (default, spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/f/../g\n    // With opts.alwaysNormalize = true (not spec compliant)\n    // http://a.com/b/cd + /e/f/../g => http://a.com/e/g\n    buildAbsoluteURL: function (baseURL, relativeURL, opts) {\n      opts = opts || {};\n      // remove any remaining space and CRLF\n      baseURL = baseURL.trim();\n      relativeURL = relativeURL.trim();\n      if (!relativeURL) {\n        // 2a) If the embedded URL is entirely empty, it inherits the\n        // entire base URL (i.e., is set equal to the base URL)\n        // and we are done.\n        if (!opts.alwaysNormalize) {\n          return baseURL;\n        }\n        var basePartsForNormalise = URLToolkit.parseURL(baseURL);\n        if (!basePartsForNormalise) {\n          throw new Error('Error trying to parse base URL.');\n        }\n        basePartsForNormalise.path = URLToolkit.normalizePath(\n          basePartsForNormalise.path\n        );\n        return URLToolkit.buildURLFromParts(basePartsForNormalise);\n      }\n      var relativeParts = URLToolkit.parseURL(relativeURL);\n      if (!relativeParts) {\n        throw new Error('Error trying to parse relative URL.');\n      }\n      if (relativeParts.scheme) {\n        // 2b) If the embedded URL starts with a scheme name, it is\n        // interpreted as an absolute URL and we are done.\n        if (!opts.alwaysNormalize) {\n          return relativeURL;\n        }\n        relativeParts.path = URLToolkit.normalizePath(relativeParts.path);\n        return URLToolkit.buildURLFromParts(relativeParts);\n      }\n      var baseParts = URLToolkit.parseURL(baseURL);\n      if (!baseParts) {\n        throw new Error('Error trying to parse base URL.');\n      }\n      if (!baseParts.netLoc && baseParts.path && baseParts.path[0] !== '/') {\n        // If netLoc missing and path doesn't start with '/', assume everthing before the first '/' is the netLoc\n        // This causes 'example.com/a' to be handled as '//example.com/a' instead of '/example.com/a'\n        var pathParts = FIRST_SEGMENT_REGEX.exec(baseParts.path);\n        baseParts.netLoc = pathParts[1];\n        baseParts.path = pathParts[2];\n      }\n      if (baseParts.netLoc && !baseParts.path) {\n        baseParts.path = '/';\n      }\n      var builtParts = {\n        // 2c) Otherwise, the embedded URL inherits the scheme of\n        // the base URL.\n        scheme: baseParts.scheme,\n        netLoc: relativeParts.netLoc,\n        path: null,\n        params: relativeParts.params,\n        query: relativeParts.query,\n        fragment: relativeParts.fragment,\n      };\n      if (!relativeParts.netLoc) {\n        // 3) If the embedded URL's <net_loc> is non-empty, we skip to\n        // Step 7.  Otherwise, the embedded URL inherits the <net_loc>\n        // (if any) of the base URL.\n        builtParts.netLoc = baseParts.netLoc;\n        // 4) If the embedded URL path is preceded by a slash \"/\", the\n        // path is not relative and we skip to Step 7.\n        if (relativeParts.path[0] !== '/') {\n          if (!relativeParts.path) {\n            // 5) If the embedded URL path is empty (and not preceded by a\n            // slash), then the embedded URL inherits the base URL path\n            builtParts.path = baseParts.path;\n            // 5a) if the embedded URL's <params> is non-empty, we skip to\n            // step 7; otherwise, it inherits the <params> of the base\n            // URL (if any) and\n            if (!relativeParts.params) {\n              builtParts.params = baseParts.params;\n              // 5b) if the embedded URL's <query> is non-empty, we skip to\n              // step 7; otherwise, it inherits the <query> of the base\n              // URL (if any) and we skip to step 7.\n              if (!relativeParts.query) {\n                builtParts.query = baseParts.query;\n              }\n            }\n          } else {\n            // 6) The last segment of the base URL's path (anything\n            // following the rightmost slash \"/\", or the entire path if no\n            // slash is present) is removed and the embedded URL's path is\n            // appended in its place.\n            var baseURLPath = baseParts.path;\n            var newPath =\n              baseURLPath.substring(0, baseURLPath.lastIndexOf('/') + 1) +\n              relativeParts.path;\n            builtParts.path = URLToolkit.normalizePath(newPath);\n          }\n        }\n      }\n      if (builtParts.path === null) {\n        builtParts.path = opts.alwaysNormalize\n          ? URLToolkit.normalizePath(relativeParts.path)\n          : relativeParts.path;\n      }\n      return URLToolkit.buildURLFromParts(builtParts);\n    },\n    parseURL: function (url) {\n      var parts = URL_REGEX.exec(url);\n      if (!parts) {\n        return null;\n      }\n      return {\n        scheme: parts[1] || '',\n        netLoc: parts[2] || '',\n        path: parts[3] || '',\n        params: parts[4] || '',\n        query: parts[5] || '',\n        fragment: parts[6] || '',\n      };\n    },\n    normalizePath: function (path) {\n      // The following operations are\n      // then applied, in order, to the new path:\n      // 6a) All occurrences of \"./\", where \".\" is a complete path\n      // segment, are removed.\n      // 6b) If the path ends with \".\" as a complete path segment,\n      // that \".\" is removed.\n      path = path.split('').reverse().join('').replace(SLASH_DOT_REGEX, '');\n      // 6c) All occurrences of \"<segment>/../\", where <segment> is a\n      // complete path segment not equal to \"..\", are removed.\n      // Removal of these path segments is performed iteratively,\n      // removing the leftmost matching pattern on each iteration,\n      // until no matching pattern remains.\n      // 6d) If the path ends with \"<segment>/..\", where <segment> is a\n      // complete path segment not equal to \"..\", that\n      // \"<segment>/..\" is removed.\n      while (\n        path.length !== (path = path.replace(SLASH_DOT_DOT_REGEX, '')).length\n      ) {}\n      return path.split('').reverse().join('');\n    },\n    buildURLFromParts: function (parts) {\n      return (\n        parts.scheme +\n        parts.netLoc +\n        parts.path +\n        parts.params +\n        parts.query +\n        parts.fragment\n      );\n    },\n  };\n\n  if (typeof exports === 'object' && typeof module === 'object')\n    module.exports = URLToolkit;\n  else if (typeof define === 'function' && define.amd)\n    define([], function () {\n      return URLToolkit;\n    });\n  else if (typeof exports === 'object') exports['URLToolkit'] = URLToolkit;\n  else root['URLToolkit'] = URLToolkit;\n})(this);\n","module.exports = require('./readable').Transform\n","'use strict';\n\nconst inherits = require('inherits');\n\nfunction Reporter(options) {\n  this._reporterState = {\n    obj: null,\n    path: [],\n    options: options || {},\n    errors: []\n  };\n}\nexports.Reporter = Reporter;\n\nReporter.prototype.isError = function isError(obj) {\n  return obj instanceof ReporterError;\n};\n\nReporter.prototype.save = function save() {\n  const state = this._reporterState;\n\n  return { obj: state.obj, pathLen: state.path.length };\n};\n\nReporter.prototype.restore = function restore(data) {\n  const state = this._reporterState;\n\n  state.obj = data.obj;\n  state.path = state.path.slice(0, data.pathLen);\n};\n\nReporter.prototype.enterKey = function enterKey(key) {\n  return this._reporterState.path.push(key);\n};\n\nReporter.prototype.exitKey = function exitKey(index) {\n  const state = this._reporterState;\n\n  state.path = state.path.slice(0, index - 1);\n};\n\nReporter.prototype.leaveKey = function leaveKey(index, key, value) {\n  const state = this._reporterState;\n\n  this.exitKey(index);\n  if (state.obj !== null)\n    state.obj[key] = value;\n};\n\nReporter.prototype.path = function path() {\n  return this._reporterState.path.join('/');\n};\n\nReporter.prototype.enterObject = function enterObject() {\n  const state = this._reporterState;\n\n  const prev = state.obj;\n  state.obj = {};\n  return prev;\n};\n\nReporter.prototype.leaveObject = function leaveObject(prev) {\n  const state = this._reporterState;\n\n  const now = state.obj;\n  state.obj = prev;\n  return now;\n};\n\nReporter.prototype.error = function error(msg) {\n  let err;\n  const state = this._reporterState;\n\n  const inherited = msg instanceof ReporterError;\n  if (inherited) {\n    err = msg;\n  } else {\n    err = new ReporterError(state.path.map(function(elem) {\n      return '[' + JSON.stringify(elem) + ']';\n    }).join(''), msg.message || msg, msg.stack);\n  }\n\n  if (!state.options.partial)\n    throw err;\n\n  if (!inherited)\n    state.errors.push(err);\n\n  return err;\n};\n\nReporter.prototype.wrapResult = function wrapResult(result) {\n  const state = this._reporterState;\n  if (!state.options.partial)\n    return result;\n\n  return {\n    result: this.isError(result) ? null : result,\n    errors: state.errors\n  };\n};\n\nfunction ReporterError(path, msg) {\n  this.path = path;\n  this.rethrow(msg);\n}\ninherits(ReporterError, Error);\n\nReporterError.prototype.rethrow = function rethrow(msg) {\n  this.message = msg + ' at: ' + (this.path || '(shallow)');\n  if (Error.captureStackTrace)\n    Error.captureStackTrace(this, ReporterError);\n\n  if (!this.stack) {\n    try {\n      // IE only adds stack when thrown\n      throw new Error(this.message);\n    } catch (e) {\n      this.stack = e.stack;\n    }\n  }\n  return this;\n};\n","'use strict';\nvar $propertyIsEnumerable = {}.propertyIsEnumerable;\n// eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\n\n// Nashorn ~ JDK8 bug\nvar NASHORN_BUG = getOwnPropertyDescriptor && !$propertyIsEnumerable.call({ 1: 2 }, 1);\n\n// `Object.prototype.propertyIsEnumerable` method implementation\n// https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable\nexports.f = NASHORN_BUG ? function propertyIsEnumerable(V) {\n  var descriptor = getOwnPropertyDescriptor(this, V);\n  return !!descriptor && descriptor.enumerable;\n} : $propertyIsEnumerable;\n","var defineWellKnownSymbol = require('../internals/define-well-known-symbol');\n\n// `Symbol.iterator` well-known symbol\n// https://tc39.es/ecma262/#sec-symbol.iterator\ndefineWellKnownSymbol('iterator');\n","/* eslint-disable no-proto -- safe */\nvar anObject = require('../internals/an-object');\nvar aPossiblePrototype = require('../internals/a-possible-prototype');\n\n// `Object.setPrototypeOf` method\n// https://tc39.es/ecma262/#sec-object.setprototypeof\n// Works with __proto__ only. Old v8 can't work with null proto objects.\n// eslint-disable-next-line es/no-object-setprototypeof -- safe\nmodule.exports = Object.setPrototypeOf || ('__proto__' in {} ? function () {\n  var CORRECT_SETTER = false;\n  var test = {};\n  var setter;\n  try {\n    // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe\n    setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;\n    setter.call(test, []);\n    CORRECT_SETTER = test instanceof Array;\n  } catch (error) { /* empty */ }\n  return function setPrototypeOf(O, proto) {\n    anObject(O);\n    aPossiblePrototype(proto);\n    if (CORRECT_SETTER) setter.call(O, proto);\n    else O.__proto__ = proto;\n    return O;\n  };\n}() : undefined);\n","/**\n * An object that stores the bytes of an FLV tag and methods for\n * querying and manipulating that data.\n * @see http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf\n */\n'use strict';\n\nvar FlvTag;\n\n// (type:uint, extraData:Boolean = false) extends ByteArray\nFlvTag = function(type, extraData) {\n  var\n    // Counter if this is a metadata tag, nal start marker if this is a video\n    // tag. unused if this is an audio tag\n    adHoc = 0, // :uint\n\n    // The default size is 16kb but this is not enough to hold iframe\n    // data and the resizing algorithm costs a bit so we create a larger\n    // starting buffer for video tags\n    bufferStartSize = 16384,\n\n    // checks whether the FLV tag has enough capacity to accept the proposed\n    // write and re-allocates the internal buffers if necessary\n    prepareWrite = function(flv, count) {\n      var\n        bytes,\n        minLength = flv.position + count;\n      if (minLength < flv.bytes.byteLength) {\n        // there's enough capacity so do nothing\n        return;\n      }\n\n      // allocate a new buffer and copy over the data that will not be modified\n      bytes = new Uint8Array(minLength * 2);\n      bytes.set(flv.bytes.subarray(0, flv.position), 0);\n      flv.bytes = bytes;\n      flv.view = new DataView(flv.bytes.buffer);\n    },\n\n    // commonly used metadata properties\n    widthBytes = FlvTag.widthBytes || new Uint8Array('width'.length),\n    heightBytes = FlvTag.heightBytes || new Uint8Array('height'.length),\n    videocodecidBytes = FlvTag.videocodecidBytes || new Uint8Array('videocodecid'.length),\n    i;\n\n  if (!FlvTag.widthBytes) {\n    // calculating the bytes of common metadata names ahead of time makes the\n    // corresponding writes faster because we don't have to loop over the\n    // characters\n    // re-test with test/perf.html if you're planning on changing this\n    for (i = 0; i < 'width'.length; i++) {\n      widthBytes[i] = 'width'.charCodeAt(i);\n    }\n    for (i = 0; i < 'height'.length; i++) {\n      heightBytes[i] = 'height'.charCodeAt(i);\n    }\n    for (i = 0; i < 'videocodecid'.length; i++) {\n      videocodecidBytes[i] = 'videocodecid'.charCodeAt(i);\n    }\n\n    FlvTag.widthBytes = widthBytes;\n    FlvTag.heightBytes = heightBytes;\n    FlvTag.videocodecidBytes = videocodecidBytes;\n  }\n\n  this.keyFrame = false; // :Boolean\n\n  switch (type) {\n  case FlvTag.VIDEO_TAG:\n    this.length = 16;\n    // Start the buffer at 256k\n    bufferStartSize *= 6;\n    break;\n  case FlvTag.AUDIO_TAG:\n    this.length = 13;\n    this.keyFrame = true;\n    break;\n  case FlvTag.METADATA_TAG:\n    this.length = 29;\n    this.keyFrame = true;\n    break;\n  default:\n    throw new Error('Unknown FLV tag type');\n  }\n\n  this.bytes = new Uint8Array(bufferStartSize);\n  this.view = new DataView(this.bytes.buffer);\n  this.bytes[0] = type;\n  this.position = this.length;\n  this.keyFrame = extraData; // Defaults to false\n\n  // presentation timestamp\n  this.pts = 0;\n  // decoder timestamp\n  this.dts = 0;\n\n  // ByteArray#writeBytes(bytes:ByteArray, offset:uint = 0, length:uint = 0)\n  this.writeBytes = function(bytes, offset, length) {\n    var\n      start = offset || 0,\n      end;\n    length = length || bytes.byteLength;\n    end = start + length;\n\n    prepareWrite(this, length);\n    this.bytes.set(bytes.subarray(start, end), this.position);\n\n    this.position += length;\n    this.length = Math.max(this.length, this.position);\n  };\n\n  // ByteArray#writeByte(value:int):void\n  this.writeByte = function(byte) {\n    prepareWrite(this, 1);\n    this.bytes[this.position] = byte;\n    this.position++;\n    this.length = Math.max(this.length, this.position);\n  };\n\n  // ByteArray#writeShort(value:int):void\n  this.writeShort = function(short) {\n    prepareWrite(this, 2);\n    this.view.setUint16(this.position, short);\n    this.position += 2;\n    this.length = Math.max(this.length, this.position);\n  };\n\n  // Negative index into array\n  // (pos:uint):int\n  this.negIndex = function(pos) {\n    return this.bytes[this.length - pos];\n  };\n\n  // The functions below ONLY work when this[0] == VIDEO_TAG.\n  // We are not going to check for that because we dont want the overhead\n  // (nal:ByteArray = null):int\n  this.nalUnitSize = function() {\n    if (adHoc === 0) {\n      return 0;\n    }\n\n    return this.length - (adHoc + 4);\n  };\n\n  this.startNalUnit = function() {\n    // remember position and add 4 bytes\n    if (adHoc > 0) {\n      throw new Error('Attempted to create new NAL wihout closing the old one');\n    }\n\n    // reserve 4 bytes for nal unit size\n    adHoc = this.length;\n    this.length += 4;\n    this.position = this.length;\n  };\n\n  // (nal:ByteArray = null):void\n  this.endNalUnit = function(nalContainer) {\n    var\n      nalStart, // :uint\n      nalLength; // :uint\n\n    // Rewind to the marker and write the size\n    if (this.length === adHoc + 4) {\n      // we started a nal unit, but didnt write one, so roll back the 4 byte size value\n      this.length -= 4;\n    } else if (adHoc > 0) {\n      nalStart = adHoc + 4;\n      nalLength = this.length - nalStart;\n\n      this.position = adHoc;\n      this.view.setUint32(this.position, nalLength);\n      this.position = this.length;\n\n      if (nalContainer) {\n        // Add the tag to the NAL unit\n        nalContainer.push(this.bytes.subarray(nalStart, nalStart + nalLength));\n      }\n    }\n\n    adHoc = 0;\n  };\n\n  /**\n   * Write out a 64-bit floating point valued metadata property. This method is\n   * called frequently during a typical parse and needs to be fast.\n   */\n  // (key:String, val:Number):void\n  this.writeMetaDataDouble = function(key, val) {\n    var i;\n    prepareWrite(this, 2 + key.length + 9);\n\n    // write size of property name\n    this.view.setUint16(this.position, key.length);\n    this.position += 2;\n\n    // this next part looks terrible but it improves parser throughput by\n    // 10kB/s in my testing\n\n    // write property name\n    if (key === 'width') {\n      this.bytes.set(widthBytes, this.position);\n      this.position += 5;\n    } else if (key === 'height') {\n      this.bytes.set(heightBytes, this.position);\n      this.position += 6;\n    } else if (key === 'videocodecid') {\n      this.bytes.set(videocodecidBytes, this.position);\n      this.position += 12;\n    } else {\n      for (i = 0; i < key.length; i++) {\n        this.bytes[this.position] = key.charCodeAt(i);\n        this.position++;\n      }\n    }\n\n    // skip null byte\n    this.position++;\n\n    // write property value\n    this.view.setFloat64(this.position, val);\n    this.position += 8;\n\n    // update flv tag length\n    this.length = Math.max(this.length, this.position);\n    ++adHoc;\n  };\n\n  // (key:String, val:Boolean):void\n  this.writeMetaDataBoolean = function(key, val) {\n    var i;\n    prepareWrite(this, 2);\n    this.view.setUint16(this.position, key.length);\n    this.position += 2;\n    for (i = 0; i < key.length; i++) {\n      // if key.charCodeAt(i) >= 255, handle error\n      prepareWrite(this, 1);\n      this.bytes[this.position] = key.charCodeAt(i);\n      this.position++;\n    }\n    prepareWrite(this, 2);\n    this.view.setUint8(this.position, 0x01);\n    this.position++;\n    this.view.setUint8(this.position, val ? 0x01 : 0x00);\n    this.position++;\n    this.length = Math.max(this.length, this.position);\n    ++adHoc;\n  };\n\n  // ():ByteArray\n  this.finalize = function() {\n    var\n      dtsDelta, // :int\n      len; // :int\n\n    switch (this.bytes[0]) {\n      // Video Data\n    case FlvTag.VIDEO_TAG:\n       // We only support AVC, 1 = key frame (for AVC, a seekable\n       // frame), 2 = inter frame (for AVC, a non-seekable frame)\n      this.bytes[11] = ((this.keyFrame || extraData) ? 0x10 : 0x20) | 0x07;\n      this.bytes[12] = extraData ?  0x00 : 0x01;\n\n      dtsDelta = this.pts - this.dts;\n      this.bytes[13] = (dtsDelta & 0x00FF0000) >>> 16;\n      this.bytes[14] = (dtsDelta & 0x0000FF00) >>>  8;\n      this.bytes[15] = (dtsDelta & 0x000000FF) >>>  0;\n      break;\n\n    case FlvTag.AUDIO_TAG:\n      this.bytes[11] = 0xAF; // 44 kHz, 16-bit stereo\n      this.bytes[12] = extraData ? 0x00 : 0x01;\n      break;\n\n    case FlvTag.METADATA_TAG:\n      this.position = 11;\n      this.view.setUint8(this.position, 0x02); // String type\n      this.position++;\n      this.view.setUint16(this.position, 0x0A); // 10 Bytes\n      this.position += 2;\n      // set \"onMetaData\"\n      this.bytes.set([0x6f, 0x6e, 0x4d, 0x65,\n                      0x74, 0x61, 0x44, 0x61,\n                      0x74, 0x61], this.position);\n      this.position += 10;\n      this.bytes[this.position] = 0x08; // Array type\n      this.position++;\n      this.view.setUint32(this.position, adHoc);\n      this.position = this.length;\n      this.bytes.set([0, 0, 9], this.position);\n      this.position += 3; // End Data Tag\n      this.length = this.position;\n      break;\n    }\n\n    len = this.length - 11;\n\n    // write the DataSize field\n    this.bytes[ 1] = (len & 0x00FF0000) >>> 16;\n    this.bytes[ 2] = (len & 0x0000FF00) >>>  8;\n    this.bytes[ 3] = (len & 0x000000FF) >>>  0;\n    // write the Timestamp\n    this.bytes[ 4] = (this.dts & 0x00FF0000) >>> 16;\n    this.bytes[ 5] = (this.dts & 0x0000FF00) >>>  8;\n    this.bytes[ 6] = (this.dts & 0x000000FF) >>>  0;\n    this.bytes[ 7] = (this.dts & 0xFF000000) >>> 24;\n    // write the StreamID\n    this.bytes[ 8] = 0;\n    this.bytes[ 9] = 0;\n    this.bytes[10] = 0;\n\n    // Sometimes we're at the end of the view and have one slot to write a\n    // uint32, so, prepareWrite of count 4, since, view is uint8\n    prepareWrite(this, 4);\n    this.view.setUint32(this.length, this.length);\n    this.length += 4;\n    this.position += 4;\n\n    // trim down the byte buffer to what is actually being used\n    this.bytes = this.bytes.subarray(0, this.length);\n    this.frameTime = FlvTag.frameTime(this.bytes);\n    // if bytes.bytelength isn't equal to this.length, handle error\n    return this;\n  };\n};\n\nFlvTag.AUDIO_TAG = 0x08; // == 8, :uint\nFlvTag.VIDEO_TAG = 0x09; // == 9, :uint\nFlvTag.METADATA_TAG = 0x12; // == 18, :uint\n\n// (tag:ByteArray):Boolean {\nFlvTag.isAudioFrame = function(tag) {\n  return FlvTag.AUDIO_TAG === tag[0];\n};\n\n// (tag:ByteArray):Boolean {\nFlvTag.isVideoFrame = function(tag) {\n  return FlvTag.VIDEO_TAG === tag[0];\n};\n\n// (tag:ByteArray):Boolean {\nFlvTag.isMetaData = function(tag) {\n  return FlvTag.METADATA_TAG === tag[0];\n};\n\n// (tag:ByteArray):Boolean {\nFlvTag.isKeyFrame = function(tag) {\n  if (FlvTag.isVideoFrame(tag)) {\n    return tag[11] === 0x17;\n  }\n\n  if (FlvTag.isAudioFrame(tag)) {\n    return true;\n  }\n\n  if (FlvTag.isMetaData(tag)) {\n    return true;\n  }\n\n  return false;\n};\n\n// (tag:ByteArray):uint {\nFlvTag.frameTime = function(tag) {\n  var pts = tag[ 4] << 16; // :uint\n  pts |= tag[ 5] <<  8;\n  pts |= tag[ 6] <<  0;\n  pts |= tag[ 7] << 24;\n  return pts;\n};\n\nmodule.exports = FlvTag;\n","import getFreshSideObject from \"./getFreshSideObject.js\";\nexport default function mergePaddingObject(paddingObject) {\n  return Object.assign({}, getFreshSideObject(), paddingObject);\n}","/**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _slicedToArray = (function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i['return']) _i['return'](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError('Invalid attempt to destructure non-iterable instance'); } }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\n// Fudge factor to account for TimeRanges rounding\nvar TIME_FUDGE_FACTOR = 1 / 30;\n// Comparisons between time values such as current time and the end of the buffered range\n// can be misleading because of precision differences or when the current media has poorly\n// aligned audio and video, which can cause values to be slightly off from what you would\n// expect. This value is what we consider to be safe to use in such comparisons to account\n// for these scenarios.\nvar SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n\n/**\n * Clamps a value to within a range\n * @param {Number} num - the value to clamp\n * @param {Number} start - the start of the range to clamp within, inclusive\n * @param {Number} end - the end of the range to clamp within, inclusive\n * @return {Number}\n */\nvar clamp = function clamp(num, _ref) {\n  var _ref2 = _slicedToArray(_ref, 2);\n\n  var start = _ref2[0];\n  var end = _ref2[1];\n\n  return Math.min(Math.max(start, num), end);\n};\nvar filterRanges = function filterRanges(timeRanges, predicate) {\n  var results = [];\n  var i = undefined;\n\n  if (timeRanges && timeRanges.length) {\n    // Search for ranges that match the predicate\n    for (i = 0; i < timeRanges.length; i++) {\n      if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n        results.push([timeRanges.start(i), timeRanges.end(i)]);\n      }\n    }\n  }\n\n  return _videoJs2['default'].createTimeRanges(results);\n};\n\n/**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time  - the time to filter on.\n * @returns {TimeRanges} a new TimeRanges object\n */\nvar findRange = function findRange(buffered, time) {\n  return filterRanges(buffered, function (start, end) {\n    return start - TIME_FUDGE_FACTOR <= time && end + TIME_FUDGE_FACTOR >= time;\n  });\n};\n\n/**\n * Returns the TimeRanges that begin later than the specified time.\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @returns {TimeRanges} a new TimeRanges object.\n */\nvar findNextRange = function findNextRange(timeRanges, time) {\n  return filterRanges(timeRanges, function (start) {\n    return start - TIME_FUDGE_FACTOR >= time;\n  });\n};\n\n/**\n * Returns gaps within a list of TimeRanges\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\nvar findGaps = function findGaps(buffered) {\n  if (buffered.length < 2) {\n    return _videoJs2['default'].createTimeRanges();\n  }\n\n  var ranges = [];\n\n  for (var i = 1; i < buffered.length; i++) {\n    var start = buffered.end(i - 1);\n    var end = buffered.start(i);\n\n    ranges.push([start, end]);\n  }\n\n  return _videoJs2['default'].createTimeRanges(ranges);\n};\n\n/**\n * Search for a likely end time for the segment that was just appened\n * based on the state of the `buffered` property before and after the\n * append. If we fin only one such uncommon end-point return it.\n * @param {TimeRanges} original - the buffered time ranges before the update\n * @param {TimeRanges} update - the buffered time ranges after the update\n * @returns {Number|null} the end time added between `original` and `update`,\n * or null if one cannot be unambiguously determined.\n */\nvar findSoleUncommonTimeRangesEnd = function findSoleUncommonTimeRangesEnd(original, update) {\n  var i = undefined;\n  var start = undefined;\n  var end = undefined;\n  var result = [];\n  var edges = [];\n\n  // In order to qualify as a possible candidate, the end point must:\n  //  1) Not have already existed in the `original` ranges\n  //  2) Not result from the shrinking of a range that already existed\n  //     in the `original` ranges\n  //  3) Not be contained inside of a range that existed in `original`\n  var overlapsCurrentEnd = function overlapsCurrentEnd(span) {\n    return span[0] <= end && span[1] >= end;\n  };\n\n  if (original) {\n    // Save all the edges in the `original` TimeRanges object\n    for (i = 0; i < original.length; i++) {\n      start = original.start(i);\n      end = original.end(i);\n\n      edges.push([start, end]);\n    }\n  }\n\n  if (update) {\n    // Save any end-points in `update` that are not in the `original`\n    // TimeRanges object\n    for (i = 0; i < update.length; i++) {\n      start = update.start(i);\n      end = update.end(i);\n\n      if (edges.some(overlapsCurrentEnd)) {\n        continue;\n      }\n\n      // at this point it must be a unique non-shrinking end edge\n      result.push(end);\n    }\n  }\n\n  // we err on the side of caution and return null if didn't find\n  // exactly *one* differing end edge in the search above\n  if (result.length !== 1) {\n    return null;\n  }\n\n  return result[0];\n};\n\n/**\n * Calculate the intersection of two TimeRanges\n * @param {TimeRanges} bufferA\n * @param {TimeRanges} bufferB\n * @returns {TimeRanges} The interesection of `bufferA` with `bufferB`\n */\nvar bufferIntersection = function bufferIntersection(bufferA, bufferB) {\n  var start = null;\n  var end = null;\n  var arity = 0;\n  var extents = [];\n  var ranges = [];\n\n  if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {\n    return _videoJs2['default'].createTimeRange();\n  }\n\n  // Handle the case where we have both buffers and create an\n  // intersection of the two\n  var count = bufferA.length;\n\n  // A) Gather up all start and end times\n  while (count--) {\n    extents.push({ time: bufferA.start(count), type: 'start' });\n    extents.push({ time: bufferA.end(count), type: 'end' });\n  }\n  count = bufferB.length;\n  while (count--) {\n    extents.push({ time: bufferB.start(count), type: 'start' });\n    extents.push({ time: bufferB.end(count), type: 'end' });\n  }\n  // B) Sort them by time\n  extents.sort(function (a, b) {\n    return a.time - b.time;\n  });\n\n  // C) Go along one by one incrementing arity for start and decrementing\n  //    arity for ends\n  for (count = 0; count < extents.length; count++) {\n    if (extents[count].type === 'start') {\n      arity++;\n\n      // D) If arity is ever incremented to 2 we are entering an\n      //    overlapping range\n      if (arity === 2) {\n        start = extents[count].time;\n      }\n    } else if (extents[count].type === 'end') {\n      arity--;\n\n      // E) If arity is ever decremented to 1 we leaving an\n      //    overlapping range\n      if (arity === 1) {\n        end = extents[count].time;\n      }\n    }\n\n    // F) Record overlapping ranges\n    if (start !== null && end !== null) {\n      ranges.push([start, end]);\n      start = null;\n      end = null;\n    }\n  }\n\n  return _videoJs2['default'].createTimeRanges(ranges);\n};\n\n/**\n * Calculates the percentage of `segmentRange` that overlaps the\n * `buffered` time ranges.\n * @param {TimeRanges} segmentRange - the time range that the segment\n * covers adjusted according to currentTime\n * @param {TimeRanges} referenceRange - the original time range that the\n * segment covers\n * @param {Number} currentTime - time in seconds where the current playback\n * is at\n * @param {TimeRanges} buffered - the currently buffered time ranges\n * @returns {Number} percent of the segment currently buffered\n */\nvar calculateBufferedPercent = function calculateBufferedPercent(adjustedRange, referenceRange, currentTime, buffered) {\n  var referenceDuration = referenceRange.end(0) - referenceRange.start(0);\n  var adjustedDuration = adjustedRange.end(0) - adjustedRange.start(0);\n  var bufferMissingFromAdjusted = referenceDuration - adjustedDuration;\n  var adjustedIntersection = bufferIntersection(adjustedRange, buffered);\n  var referenceIntersection = bufferIntersection(referenceRange, buffered);\n  var adjustedOverlap = 0;\n  var referenceOverlap = 0;\n\n  var count = adjustedIntersection.length;\n\n  while (count--) {\n    adjustedOverlap += adjustedIntersection.end(count) - adjustedIntersection.start(count);\n\n    // If the current overlap segment starts at currentTime, then increase the\n    // overlap duration so that it actually starts at the beginning of referenceRange\n    // by including the difference between the two Range's durations\n    // This is a work around for the way Flash has no buffer before currentTime\n    if (adjustedIntersection.start(count) === currentTime) {\n      adjustedOverlap += bufferMissingFromAdjusted;\n    }\n  }\n\n  count = referenceIntersection.length;\n\n  while (count--) {\n    referenceOverlap += referenceIntersection.end(count) - referenceIntersection.start(count);\n  }\n\n  // Use whichever value is larger for the percentage-buffered since that value\n  // is likely more accurate because the only way\n  return Math.max(adjustedOverlap, referenceOverlap) / referenceDuration * 100;\n};\n\n/**\n * Return the amount of a range specified by the startOfSegment and segmentDuration\n * overlaps the current buffered content.\n *\n * @param {Number} startOfSegment - the time where the segment begins\n * @param {Number} segmentDuration - the duration of the segment in seconds\n * @param {Number} currentTime - time in seconds where the current playback\n * is at\n * @param {TimeRanges} buffered - the state of the buffer\n * @returns {Number} percentage of the segment's time range that is\n * already in `buffered`\n */\nvar getSegmentBufferedPercent = function getSegmentBufferedPercent(startOfSegment, segmentDuration, currentTime, buffered) {\n  var endOfSegment = startOfSegment + segmentDuration;\n\n  // The entire time range of the segment\n  var originalSegmentRange = _videoJs2['default'].createTimeRanges([[startOfSegment, endOfSegment]]);\n\n  // The adjusted segment time range that is setup such that it starts\n  // no earlier than currentTime\n  // Flash has no notion of a back-buffer so adjustedSegmentRange adjusts\n  // for that and the function will still return 100% if a only half of a\n  // segment is actually in the buffer as long as the currentTime is also\n  // half-way through the segment\n  var adjustedSegmentRange = _videoJs2['default'].createTimeRanges([[clamp(startOfSegment, [currentTime, endOfSegment]), endOfSegment]]);\n\n  // This condition happens when the currentTime is beyond the segment's\n  // end time\n  if (adjustedSegmentRange.start(0) === adjustedSegmentRange.end(0)) {\n    return 0;\n  }\n\n  var percent = calculateBufferedPercent(adjustedSegmentRange, originalSegmentRange, currentTime, buffered);\n\n  // If the segment is reported as having a zero duration, return 0%\n  // since it is likely that we will need to fetch the segment\n  if (isNaN(percent) || percent === Infinity || percent === -Infinity) {\n    return 0;\n  }\n\n  return percent;\n};\n\n/**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @returns {String} a human readable string\n */\nvar printableRange = function printableRange(range) {\n  var strArr = [];\n\n  if (!range || !range.length) {\n    return '';\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    strArr.push(range.start(i) + ' => ' + range.end(i));\n  }\n\n  return strArr.join(', ');\n};\n\n/**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n *        The state of the buffer\n * @param {Numnber} currentTime\n *        The current time of the player\n * @param {Number} playbackRate\n *        The current playback rate of the player. Defaults to 1.\n * @return {Number}\n *         Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\nvar timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime) {\n  var playbackRate = arguments.length <= 2 || arguments[2] === undefined ? 1 : arguments[2];\n\n  var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n\n  return (bufferedEnd - currentTime) / playbackRate;\n};\n\nexports['default'] = {\n  findRange: findRange,\n  findNextRange: findNextRange,\n  findGaps: findGaps,\n  findSoleUncommonTimeRangesEnd: findSoleUncommonTimeRangesEnd,\n  getSegmentBufferedPercent: getSegmentBufferedPercent,\n  TIME_FUDGE_FACTOR: TIME_FUDGE_FACTOR,\n  SAFE_TIME_DELTA: SAFE_TIME_DELTA,\n  printableRange: printableRange,\n  timeUntilRebuffer: timeUntilRebuffer\n};\nmodule.exports = exports['default'];","var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar redefine = require('../internals/redefine');\nvar toString = require('../internals/object-to-string');\n\n// `Object.prototype.toString` method\n// https://tc39.es/ecma262/#sec-object.prototype.tostring\nif (!TO_STRING_TAG_SUPPORT) {\n  redefine(Object.prototype, 'toString', toString, { unsafe: true });\n}\n","'use strict'\nvar inherits = require('inherits')\nvar Buffer = require('safe-buffer').Buffer\n\nvar Base = require('cipher-base')\n\nvar ZEROS = Buffer.alloc(128)\nvar blocksize = 64\n\nfunction Hmac (alg, key) {\n  Base.call(this, 'digest')\n  if (typeof key === 'string') {\n    key = Buffer.from(key)\n  }\n\n  this._alg = alg\n  this._key = key\n\n  if (key.length > blocksize) {\n    key = alg(key)\n  } else if (key.length < blocksize) {\n    key = Buffer.concat([key, ZEROS], blocksize)\n  }\n\n  var ipad = this._ipad = Buffer.allocUnsafe(blocksize)\n  var opad = this._opad = Buffer.allocUnsafe(blocksize)\n\n  for (var i = 0; i < blocksize; i++) {\n    ipad[i] = key[i] ^ 0x36\n    opad[i] = key[i] ^ 0x5C\n  }\n\n  this._hash = [ipad]\n}\n\ninherits(Hmac, Base)\n\nHmac.prototype._update = function (data) {\n  this._hash.push(data)\n}\n\nHmac.prototype._final = function () {\n  var h = this._alg(Buffer.concat(this._hash))\n  return this._alg(Buffer.concat([this._opad, h]))\n}\nmodule.exports = Hmac\n","var defineProperty = require('../internals/object-define-property').f;\nvar has = require('../internals/has');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\n\nmodule.exports = function (it, TAG, STATIC) {\n  if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG)) {\n    defineProperty(it, TO_STRING_TAG, { configurable: true, value: TAG });\n  }\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nmodule.exports = Stream;\n\nvar EE = require('events').EventEmitter;\nvar inherits = require('inherits');\n\ninherits(Stream, EE);\nStream.Readable = require('readable-stream/readable.js');\nStream.Writable = require('readable-stream/writable.js');\nStream.Duplex = require('readable-stream/duplex.js');\nStream.Transform = require('readable-stream/transform.js');\nStream.PassThrough = require('readable-stream/passthrough.js');\n\n// Backwards-compat with node 0.4.x\nStream.Stream = Stream;\n\n\n\n// old-style streams.  Note that the pipe method (the only relevant\n// part of this class) is overridden in the Readable class.\n\nfunction Stream() {\n  EE.call(this);\n}\n\nStream.prototype.pipe = function(dest, options) {\n  var source = this;\n\n  function ondata(chunk) {\n    if (dest.writable) {\n      if (false === dest.write(chunk) && source.pause) {\n        source.pause();\n      }\n    }\n  }\n\n  source.on('data', ondata);\n\n  function ondrain() {\n    if (source.readable && source.resume) {\n      source.resume();\n    }\n  }\n\n  dest.on('drain', ondrain);\n\n  // If the 'end' option is not supplied, dest.end() will be called when\n  // source gets the 'end' or 'close' events.  Only dest.end() once.\n  if (!dest._isStdio && (!options || options.end !== false)) {\n    source.on('end', onend);\n    source.on('close', onclose);\n  }\n\n  var didOnEnd = false;\n  function onend() {\n    if (didOnEnd) return;\n    didOnEnd = true;\n\n    dest.end();\n  }\n\n\n  function onclose() {\n    if (didOnEnd) return;\n    didOnEnd = true;\n\n    if (typeof dest.destroy === 'function') dest.destroy();\n  }\n\n  // don't leave dangling pipes when there are errors.\n  function onerror(er) {\n    cleanup();\n    if (EE.listenerCount(this, 'error') === 0) {\n      throw er; // Unhandled stream error in pipe.\n    }\n  }\n\n  source.on('error', onerror);\n  dest.on('error', onerror);\n\n  // remove all the event listeners that were added.\n  function cleanup() {\n    source.removeListener('data', ondata);\n    dest.removeListener('drain', ondrain);\n\n    source.removeListener('end', onend);\n    source.removeListener('close', onclose);\n\n    source.removeListener('error', onerror);\n    dest.removeListener('error', onerror);\n\n    source.removeListener('end', cleanup);\n    source.removeListener('close', cleanup);\n\n    dest.removeListener('close', cleanup);\n  }\n\n  source.on('end', cleanup);\n  source.on('close', cleanup);\n\n  dest.on('close', cleanup);\n\n  dest.emit('pipe', source);\n\n  // Allow for unix-like usage: A.pipe(B).pipe(C)\n  return dest;\n};\n","/**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _videoJs = require('video.js');\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\n/**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\nvar backwardDuration = function backwardDuration(playlist, endSequence) {\n  var result = 0;\n  var i = endSequence - playlist.mediaSequence;\n  // if a start time is available for segment immediately following\n  // the interval, use it\n  var segment = playlist.segments[i];\n\n  // Walk backward until we find the latest segment with timeline\n  // information that is earlier than endSequence\n  if (segment) {\n    if (typeof segment.start !== 'undefined') {\n      return { result: segment.start, precise: true };\n    }\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - segment.duration,\n        precise: true\n      };\n    }\n  }\n  while (i--) {\n    segment = playlist.segments[i];\n    if (typeof segment.end !== 'undefined') {\n      return { result: result + segment.end, precise: true };\n    }\n\n    result += segment.duration;\n\n    if (typeof segment.start !== 'undefined') {\n      return { result: result + segment.start, precise: true };\n    }\n  }\n  return { result: result, precise: false };\n};\n\n/**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\nvar forwardDuration = function forwardDuration(playlist, endSequence) {\n  var result = 0;\n  var segment = undefined;\n  var i = endSequence - playlist.mediaSequence;\n  // Walk forward until we find the earliest segment with timeline\n  // information\n\n  for (; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i];\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start - result,\n        precise: true\n      };\n    }\n\n    result += segment.duration;\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - result,\n        precise: true\n      };\n    }\n  }\n  // indicate we didn't find a useful duration estimate\n  return { result: -1, precise: false };\n};\n\n/**\n  * Calculate the media duration from the segments associated with a\n  * playlist. The duration of a subinterval of the available segments\n  * may be calculated by specifying an end index.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {Number=} endSequence an exclusive upper boundary\n  * for the playlist.  Defaults to playlist length.\n  * @param {Number} expired the amount of time that has dropped\n  * off the front of the playlist in a live scenario\n  * @return {Number} the duration between the first available segment\n  * and end index.\n  */\nvar intervalDuration = function intervalDuration(playlist, endSequence, expired) {\n  var backward = undefined;\n  var forward = undefined;\n\n  if (typeof endSequence === 'undefined') {\n    endSequence = playlist.mediaSequence + playlist.segments.length;\n  }\n\n  if (endSequence < playlist.mediaSequence) {\n    return 0;\n  }\n\n  // do a backward walk to estimate the duration\n  backward = backwardDuration(playlist, endSequence);\n  if (backward.precise) {\n    // if we were able to base our duration estimate on timing\n    // information provided directly from the Media Source, return\n    // it\n    return backward.result;\n  }\n\n  // walk forward to see if a precise duration estimate can be made\n  // that way\n  forward = forwardDuration(playlist, endSequence);\n  if (forward.precise) {\n    // we found a segment that has been buffered and so it's\n    // position is known precisely\n    return forward.result;\n  }\n\n  // return the less-precise, playlist-based duration estimate\n  return backward.result + expired;\n};\n\n/**\n  * Calculates the duration of a playlist. If a start and end index\n  * are specified, the duration will be for the subset of the media\n  * timeline between those two indices. The total duration for live\n  * playlists is always Infinity.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {Number=} endSequence an exclusive upper\n  * boundary for the playlist. Defaults to the playlist media\n  * sequence number plus its length.\n  * @param {Number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {Number} the duration between the start index and end\n  * index.\n  */\nvar duration = function duration(playlist, endSequence, expired) {\n  if (!playlist) {\n    return 0;\n  }\n\n  if (typeof expired !== 'number') {\n    expired = 0;\n  }\n\n  // if a slice of the total duration is not requested, use\n  // playlist-level duration indicators when they're present\n  if (typeof endSequence === 'undefined') {\n    // if present, use the duration specified in the playlist\n    if (playlist.totalDuration) {\n      return playlist.totalDuration;\n    }\n\n    // duration should be Infinity for live playlists\n    if (!playlist.endList) {\n      return _globalWindow2['default'].Infinity;\n    }\n  }\n\n  // calculate the total duration based on the segment durations\n  return intervalDuration(playlist, endSequence, expired);\n};\n\nexports.duration = duration;\n/**\n  * Calculate the time between two indexes in the current playlist\n  * neight the start- nor the end-index need to be within the current\n  * playlist in which case, the targetDuration of the playlist is used\n  * to approximate the durations of the segments\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {Number} startIndex\n  * @param {Number} endIndex\n  * @return {Number} the number of seconds between startIndex and endIndex\n  */\nvar sumDurations = function sumDurations(playlist, startIndex, endIndex) {\n  var durations = 0;\n\n  if (startIndex > endIndex) {\n    var _ref = [endIndex, startIndex];\n    startIndex = _ref[0];\n    endIndex = _ref[1];\n  }\n\n  if (startIndex < 0) {\n    for (var i = startIndex; i < Math.min(0, endIndex); i++) {\n      durations += playlist.targetDuration;\n    }\n    startIndex = 0;\n  }\n\n  for (var i = startIndex; i < endIndex; i++) {\n    durations += playlist.segments[i].duration;\n  }\n\n  return durations;\n};\n\nexports.sumDurations = sumDurations;\n/**\n * Determines the media index of the segment corresponding to the safe edge of the live\n * window which is the duration of the last segment plus 2 target durations from the end\n * of the playlist.\n *\n * @param {Object} playlist\n *        a media playlist object\n * @return {Number}\n *         The media index of the segment at the safe live point. 0 if there is no \"safe\"\n *         point.\n * @function safeLiveIndex\n */\nvar safeLiveIndex = function safeLiveIndex(playlist) {\n  if (!playlist.segments.length) {\n    return 0;\n  }\n\n  var i = playlist.segments.length - 1;\n  var distanceFromEnd = playlist.segments[i].duration || playlist.targetDuration;\n  var safeDistance = distanceFromEnd + playlist.targetDuration * 2;\n\n  while (i--) {\n    distanceFromEnd += playlist.segments[i].duration;\n\n    if (distanceFromEnd >= safeDistance) {\n      break;\n    }\n  }\n\n  return Math.max(0, i);\n};\n\nexports.safeLiveIndex = safeLiveIndex;\n/**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {Number=} expired the amount of time that has\n *                  dropped off the front of the playlist in a live scenario\n * @param {Boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n *                        playlist end calculation should consider the safe live end\n *                        (truncate the playlist end by three segments). This is normally\n *                        used for calculating the end of the playlist's seekable range.\n * @returns {Number} the end time of playlist\n * @function playlistEnd\n */\nvar playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd) {\n  if (!playlist || !playlist.segments) {\n    return null;\n  }\n  if (playlist.endList) {\n    return duration(playlist);\n  }\n\n  if (expired === null) {\n    return null;\n  }\n\n  expired = expired || 0;\n\n  var endSequence = useSafeLiveEnd ? safeLiveIndex(playlist) : playlist.segments.length;\n\n  return intervalDuration(playlist, playlist.mediaSequence + endSequence, expired);\n};\n\nexports.playlistEnd = playlistEnd;\n/**\n  * Calculates the interval of time that is currently seekable in a\n  * playlist. The returned time ranges are relative to the earliest\n  * moment in the specified playlist that is still available. A full\n  * seekable implementation for live streams would need to offset\n  * these values by the duration of content that has expired from the\n  * stream.\n  *\n  * @param {Object} playlist a media playlist object\n  * dropped off the front of the playlist in a live scenario\n  * @param {Number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {TimeRanges} the periods of time that are valid targets\n  * for seeking\n  */\nvar seekable = function seekable(playlist, expired) {\n  var useSafeLiveEnd = true;\n  var seekableStart = expired || 0;\n  var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd);\n\n  if (seekableEnd === null) {\n    return (0, _videoJs.createTimeRange)();\n  }\n  return (0, _videoJs.createTimeRange)(seekableStart, seekableEnd);\n};\n\nexports.seekable = seekable;\nvar isWholeNumber = function isWholeNumber(num) {\n  return num - Math.floor(num) === 0;\n};\n\nvar roundSignificantDigit = function roundSignificantDigit(increment, num) {\n  // If we have a whole number, just add 1 to it\n  if (isWholeNumber(num)) {\n    return num + increment * 0.1;\n  }\n\n  var numDecimalDigits = num.toString().split('.')[1].length;\n\n  for (var i = 1; i <= numDecimalDigits; i++) {\n    var scale = Math.pow(10, i);\n    var temp = num * scale;\n\n    if (isWholeNumber(temp) || i === numDecimalDigits) {\n      return (temp + increment) / scale;\n    }\n  }\n};\n\nvar ceilLeastSignificantDigit = roundSignificantDigit.bind(null, 1);\nvar floorLeastSignificantDigit = roundSignificantDigit.bind(null, -1);\n\n/**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} playlist the media playlist to query\n * @param {Number} currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {Number} startIndex\n * @param {Number} startTime\n * @return {Object}\n */\nvar getMediaInfoForTime = function getMediaInfoForTime(playlist, currentTime, startIndex, startTime) {\n  var i = undefined;\n  var segment = undefined;\n  var numSegments = playlist.segments.length;\n\n  var time = currentTime - startTime;\n\n  if (time < 0) {\n    // Walk backward from startIndex in the playlist, adding durations\n    // until we find a segment that contains `time` and return it\n    if (startIndex > 0) {\n      for (i = startIndex - 1; i >= 0; i--) {\n        segment = playlist.segments[i];\n        time += floorLeastSignificantDigit(segment.duration);\n        if (time > 0) {\n          return {\n            mediaIndex: i,\n            startTime: startTime - sumDurations(playlist, startIndex, i)\n          };\n        }\n      }\n    }\n    // We were unable to find a good segment within the playlist\n    // so select the first segment\n    return {\n      mediaIndex: 0,\n      startTime: currentTime\n    };\n  }\n\n  // When startIndex is negative, we first walk forward to first segment\n  // adding target durations. If we \"run out of time\" before getting to\n  // the first segment, return the first segment\n  if (startIndex < 0) {\n    for (i = startIndex; i < 0; i++) {\n      time -= playlist.targetDuration;\n      if (time < 0) {\n        return {\n          mediaIndex: 0,\n          startTime: currentTime\n        };\n      }\n    }\n    startIndex = 0;\n  }\n\n  // Walk forward from startIndex in the playlist, subtracting durations\n  // until we find a segment that contains `time` and return it\n  for (i = startIndex; i < numSegments; i++) {\n    segment = playlist.segments[i];\n    time -= ceilLeastSignificantDigit(segment.duration);\n    if (time < 0) {\n      return {\n        mediaIndex: i,\n        startTime: startTime + sumDurations(playlist, startIndex, i)\n      };\n    }\n  }\n\n  // We are out of possible candidates so load the last one...\n  return {\n    mediaIndex: numSegments - 1,\n    startTime: currentTime\n  };\n};\n\nexports.getMediaInfoForTime = getMediaInfoForTime;\n/**\n * Check whether the playlist is blacklisted or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is blacklisted or not\n * @function isBlacklisted\n */\nvar isBlacklisted = function isBlacklisted(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n};\n\nexports.isBlacklisted = isBlacklisted;\n/**\n * Check whether the playlist is compatible with current playback configuration or has\n * been blacklisted permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\nvar isIncompatible = function isIncompatible(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n};\n\nexports.isIncompatible = isIncompatible;\n/**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\nvar isEnabled = function isEnabled(playlist) {\n  var blacklisted = isBlacklisted(playlist);\n\n  return !playlist.disabled && !blacklisted;\n};\n\nexports.isEnabled = isEnabled;\n/**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\nvar isDisabled = function isDisabled(playlist) {\n  return playlist.disabled;\n};\n\nexports.isDisabled = isDisabled;\n/**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {Boolean} true if it's an AES encrypted HLS stream\n */\nvar isAes = function isAes(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].key) {\n      return true;\n    }\n  }\n  return false;\n};\n\nexports.isAes = isAes;\n/**\n * Returns whether the current playlist contains fMP4\n *\n * @return {Boolean} true if the playlist contains fMP4\n */\nvar isFmp4 = function isFmp4(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].map) {\n      return true;\n    }\n  }\n  return false;\n};\n\nexports.isFmp4 = isFmp4;\n/**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {String} attr\n *        Attribute to check for\n * @param {Object} playlist\n *        The media playlist object\n * @return {Boolean}\n *         Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\nvar hasAttribute = function hasAttribute(attr, playlist) {\n  return playlist.attributes && playlist.attributes[attr];\n};\n\nexports.hasAttribute = hasAttribute;\n/**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {Number} segmentDuration\n *        Duration of requested segment\n * @param {Number} bandwidth\n *        Current measured bandwidth of the player\n * @param {Object} playlist\n *        The media playlist object\n * @param {Number=} bytesReceived\n *        Number of bytes already received for the request. Defaults to 0\n * @return {Number|NaN}\n *         The estimated time to request the segment. NaN if bandwidth information for\n *         the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\nvar estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist) {\n  var bytesReceived = arguments.length <= 3 || arguments[3] === undefined ? 0 : arguments[3];\n\n  if (!hasAttribute('BANDWIDTH', playlist)) {\n    return NaN;\n  }\n\n  var size = segmentDuration * playlist.attributes.BANDWIDTH;\n\n  return (size - bytesReceived * 8) / bandwidth;\n};\n\nexports.estimateSegmentRequestTime = estimateSegmentRequestTime;\n/*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\nvar isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {\n  if (master.playlists.length === 1) {\n    return true;\n  }\n\n  var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n\n  return master.playlists.filter(function (playlist) {\n    if (!isEnabled(playlist)) {\n      return false;\n    }\n\n    return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n  }).length === 0;\n};\n\nexports.isLowestEnabledRendition = isLowestEnabledRendition;\n// exports\nexports['default'] = {\n  duration: duration,\n  seekable: seekable,\n  safeLiveIndex: safeLiveIndex,\n  getMediaInfoForTime: getMediaInfoForTime,\n  isEnabled: isEnabled,\n  isDisabled: isDisabled,\n  isBlacklisted: isBlacklisted,\n  isIncompatible: isIncompatible,\n  playlistEnd: playlistEnd,\n  isAes: isAes,\n  isFmp4: isFmp4,\n  hasAttribute: hasAttribute,\n  estimateSegmentRequestTime: estimateSegmentRequestTime,\n  isLowestEnabledRendition: isLowestEnabledRendition\n};",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./x64-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./x64-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var Hasher = C_lib.Hasher;\n\t    var C_x64 = C.x64;\n\t    var X64Word = C_x64.Word;\n\t    var X64WordArray = C_x64.WordArray;\n\t    var C_algo = C.algo;\n\n\t    function X64Word_create() {\n\t        return X64Word.create.apply(X64Word, arguments);\n\t    }\n\n\t    // Constants\n\t    var K = [\n\t        X64Word_create(0x428a2f98, 0xd728ae22), X64Word_create(0x71374491, 0x23ef65cd),\n\t        X64Word_create(0xb5c0fbcf, 0xec4d3b2f), X64Word_create(0xe9b5dba5, 0x8189dbbc),\n\t        X64Word_create(0x3956c25b, 0xf348b538), X64Word_create(0x59f111f1, 0xb605d019),\n\t        X64Word_create(0x923f82a4, 0xaf194f9b), X64Word_create(0xab1c5ed5, 0xda6d8118),\n\t        X64Word_create(0xd807aa98, 0xa3030242), X64Word_create(0x12835b01, 0x45706fbe),\n\t        X64Word_create(0x243185be, 0x4ee4b28c), X64Word_create(0x550c7dc3, 0xd5ffb4e2),\n\t        X64Word_create(0x72be5d74, 0xf27b896f), X64Word_create(0x80deb1fe, 0x3b1696b1),\n\t        X64Word_create(0x9bdc06a7, 0x25c71235), X64Word_create(0xc19bf174, 0xcf692694),\n\t        X64Word_create(0xe49b69c1, 0x9ef14ad2), X64Word_create(0xefbe4786, 0x384f25e3),\n\t        X64Word_create(0x0fc19dc6, 0x8b8cd5b5), X64Word_create(0x240ca1cc, 0x77ac9c65),\n\t        X64Word_create(0x2de92c6f, 0x592b0275), X64Word_create(0x4a7484aa, 0x6ea6e483),\n\t        X64Word_create(0x5cb0a9dc, 0xbd41fbd4), X64Word_create(0x76f988da, 0x831153b5),\n\t        X64Word_create(0x983e5152, 0xee66dfab), X64Word_create(0xa831c66d, 0x2db43210),\n\t        X64Word_create(0xb00327c8, 0x98fb213f), X64Word_create(0xbf597fc7, 0xbeef0ee4),\n\t        X64Word_create(0xc6e00bf3, 0x3da88fc2), X64Word_create(0xd5a79147, 0x930aa725),\n\t        X64Word_create(0x06ca6351, 0xe003826f), X64Word_create(0x14292967, 0x0a0e6e70),\n\t        X64Word_create(0x27b70a85, 0x46d22ffc), X64Word_create(0x2e1b2138, 0x5c26c926),\n\t        X64Word_create(0x4d2c6dfc, 0x5ac42aed), X64Word_create(0x53380d13, 0x9d95b3df),\n\t        X64Word_create(0x650a7354, 0x8baf63de), X64Word_create(0x766a0abb, 0x3c77b2a8),\n\t        X64Word_create(0x81c2c92e, 0x47edaee6), X64Word_create(0x92722c85, 0x1482353b),\n\t        X64Word_create(0xa2bfe8a1, 0x4cf10364), X64Word_create(0xa81a664b, 0xbc423001),\n\t        X64Word_create(0xc24b8b70, 0xd0f89791), X64Word_create(0xc76c51a3, 0x0654be30),\n\t        X64Word_create(0xd192e819, 0xd6ef5218), X64Word_create(0xd6990624, 0x5565a910),\n\t        X64Word_create(0xf40e3585, 0x5771202a), X64Word_create(0x106aa070, 0x32bbd1b8),\n\t        X64Word_create(0x19a4c116, 0xb8d2d0c8), X64Word_create(0x1e376c08, 0x5141ab53),\n\t        X64Word_create(0x2748774c, 0xdf8eeb99), X64Word_create(0x34b0bcb5, 0xe19b48a8),\n\t        X64Word_create(0x391c0cb3, 0xc5c95a63), X64Word_create(0x4ed8aa4a, 0xe3418acb),\n\t        X64Word_create(0x5b9cca4f, 0x7763e373), X64Word_create(0x682e6ff3, 0xd6b2b8a3),\n\t        X64Word_create(0x748f82ee, 0x5defb2fc), X64Word_create(0x78a5636f, 0x43172f60),\n\t        X64Word_create(0x84c87814, 0xa1f0ab72), X64Word_create(0x8cc70208, 0x1a6439ec),\n\t        X64Word_create(0x90befffa, 0x23631e28), X64Word_create(0xa4506ceb, 0xde82bde9),\n\t        X64Word_create(0xbef9a3f7, 0xb2c67915), X64Word_create(0xc67178f2, 0xe372532b),\n\t        X64Word_create(0xca273ece, 0xea26619c), X64Word_create(0xd186b8c7, 0x21c0c207),\n\t        X64Word_create(0xeada7dd6, 0xcde0eb1e), X64Word_create(0xf57d4f7f, 0xee6ed178),\n\t        X64Word_create(0x06f067aa, 0x72176fba), X64Word_create(0x0a637dc5, 0xa2c898a6),\n\t        X64Word_create(0x113f9804, 0xbef90dae), X64Word_create(0x1b710b35, 0x131c471b),\n\t        X64Word_create(0x28db77f5, 0x23047d84), X64Word_create(0x32caab7b, 0x40c72493),\n\t        X64Word_create(0x3c9ebe0a, 0x15c9bebc), X64Word_create(0x431d67c4, 0x9c100d4c),\n\t        X64Word_create(0x4cc5d4be, 0xcb3e42b6), X64Word_create(0x597f299c, 0xfc657e2a),\n\t        X64Word_create(0x5fcb6fab, 0x3ad6faec), X64Word_create(0x6c44198c, 0x4a475817)\n\t    ];\n\n\t    // Reusable objects\n\t    var W = [];\n\t    (function () {\n\t        for (var i = 0; i < 80; i++) {\n\t            W[i] = X64Word_create();\n\t        }\n\t    }());\n\n\t    /**\n\t     * SHA-512 hash algorithm.\n\t     */\n\t    var SHA512 = C_algo.SHA512 = Hasher.extend({\n\t        _doReset: function () {\n\t            this._hash = new X64WordArray.init([\n\t                new X64Word.init(0x6a09e667, 0xf3bcc908), new X64Word.init(0xbb67ae85, 0x84caa73b),\n\t                new X64Word.init(0x3c6ef372, 0xfe94f82b), new X64Word.init(0xa54ff53a, 0x5f1d36f1),\n\t                new X64Word.init(0x510e527f, 0xade682d1), new X64Word.init(0x9b05688c, 0x2b3e6c1f),\n\t                new X64Word.init(0x1f83d9ab, 0xfb41bd6b), new X64Word.init(0x5be0cd19, 0x137e2179)\n\t            ]);\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Shortcuts\n\t            var H = this._hash.words;\n\n\t            var H0 = H[0];\n\t            var H1 = H[1];\n\t            var H2 = H[2];\n\t            var H3 = H[3];\n\t            var H4 = H[4];\n\t            var H5 = H[5];\n\t            var H6 = H[6];\n\t            var H7 = H[7];\n\n\t            var H0h = H0.high;\n\t            var H0l = H0.low;\n\t            var H1h = H1.high;\n\t            var H1l = H1.low;\n\t            var H2h = H2.high;\n\t            var H2l = H2.low;\n\t            var H3h = H3.high;\n\t            var H3l = H3.low;\n\t            var H4h = H4.high;\n\t            var H4l = H4.low;\n\t            var H5h = H5.high;\n\t            var H5l = H5.low;\n\t            var H6h = H6.high;\n\t            var H6l = H6.low;\n\t            var H7h = H7.high;\n\t            var H7l = H7.low;\n\n\t            // Working variables\n\t            var ah = H0h;\n\t            var al = H0l;\n\t            var bh = H1h;\n\t            var bl = H1l;\n\t            var ch = H2h;\n\t            var cl = H2l;\n\t            var dh = H3h;\n\t            var dl = H3l;\n\t            var eh = H4h;\n\t            var el = H4l;\n\t            var fh = H5h;\n\t            var fl = H5l;\n\t            var gh = H6h;\n\t            var gl = H6l;\n\t            var hh = H7h;\n\t            var hl = H7l;\n\n\t            // Rounds\n\t            for (var i = 0; i < 80; i++) {\n\t                var Wil;\n\t                var Wih;\n\n\t                // Shortcut\n\t                var Wi = W[i];\n\n\t                // Extend message\n\t                if (i < 16) {\n\t                    Wih = Wi.high = M[offset + i * 2]     | 0;\n\t                    Wil = Wi.low  = M[offset + i * 2 + 1] | 0;\n\t                } else {\n\t                    // Gamma0\n\t                    var gamma0x  = W[i - 15];\n\t                    var gamma0xh = gamma0x.high;\n\t                    var gamma0xl = gamma0x.low;\n\t                    var gamma0h  = ((gamma0xh >>> 1) | (gamma0xl << 31)) ^ ((gamma0xh >>> 8) | (gamma0xl << 24)) ^ (gamma0xh >>> 7);\n\t                    var gamma0l  = ((gamma0xl >>> 1) | (gamma0xh << 31)) ^ ((gamma0xl >>> 8) | (gamma0xh << 24)) ^ ((gamma0xl >>> 7) | (gamma0xh << 25));\n\n\t                    // Gamma1\n\t                    var gamma1x  = W[i - 2];\n\t                    var gamma1xh = gamma1x.high;\n\t                    var gamma1xl = gamma1x.low;\n\t                    var gamma1h  = ((gamma1xh >>> 19) | (gamma1xl << 13)) ^ ((gamma1xh << 3) | (gamma1xl >>> 29)) ^ (gamma1xh >>> 6);\n\t                    var gamma1l  = ((gamma1xl >>> 19) | (gamma1xh << 13)) ^ ((gamma1xl << 3) | (gamma1xh >>> 29)) ^ ((gamma1xl >>> 6) | (gamma1xh << 26));\n\n\t                    // W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16]\n\t                    var Wi7  = W[i - 7];\n\t                    var Wi7h = Wi7.high;\n\t                    var Wi7l = Wi7.low;\n\n\t                    var Wi16  = W[i - 16];\n\t                    var Wi16h = Wi16.high;\n\t                    var Wi16l = Wi16.low;\n\n\t                    Wil = gamma0l + Wi7l;\n\t                    Wih = gamma0h + Wi7h + ((Wil >>> 0) < (gamma0l >>> 0) ? 1 : 0);\n\t                    Wil = Wil + gamma1l;\n\t                    Wih = Wih + gamma1h + ((Wil >>> 0) < (gamma1l >>> 0) ? 1 : 0);\n\t                    Wil = Wil + Wi16l;\n\t                    Wih = Wih + Wi16h + ((Wil >>> 0) < (Wi16l >>> 0) ? 1 : 0);\n\n\t                    Wi.high = Wih;\n\t                    Wi.low  = Wil;\n\t                }\n\n\t                var chh  = (eh & fh) ^ (~eh & gh);\n\t                var chl  = (el & fl) ^ (~el & gl);\n\t                var majh = (ah & bh) ^ (ah & ch) ^ (bh & ch);\n\t                var majl = (al & bl) ^ (al & cl) ^ (bl & cl);\n\n\t                var sigma0h = ((ah >>> 28) | (al << 4))  ^ ((ah << 30)  | (al >>> 2)) ^ ((ah << 25) | (al >>> 7));\n\t                var sigma0l = ((al >>> 28) | (ah << 4))  ^ ((al << 30)  | (ah >>> 2)) ^ ((al << 25) | (ah >>> 7));\n\t                var sigma1h = ((eh >>> 14) | (el << 18)) ^ ((eh >>> 18) | (el << 14)) ^ ((eh << 23) | (el >>> 9));\n\t                var sigma1l = ((el >>> 14) | (eh << 18)) ^ ((el >>> 18) | (eh << 14)) ^ ((el << 23) | (eh >>> 9));\n\n\t                // t1 = h + sigma1 + ch + K[i] + W[i]\n\t                var Ki  = K[i];\n\t                var Kih = Ki.high;\n\t                var Kil = Ki.low;\n\n\t                var t1l = hl + sigma1l;\n\t                var t1h = hh + sigma1h + ((t1l >>> 0) < (hl >>> 0) ? 1 : 0);\n\t                var t1l = t1l + chl;\n\t                var t1h = t1h + chh + ((t1l >>> 0) < (chl >>> 0) ? 1 : 0);\n\t                var t1l = t1l + Kil;\n\t                var t1h = t1h + Kih + ((t1l >>> 0) < (Kil >>> 0) ? 1 : 0);\n\t                var t1l = t1l + Wil;\n\t                var t1h = t1h + Wih + ((t1l >>> 0) < (Wil >>> 0) ? 1 : 0);\n\n\t                // t2 = sigma0 + maj\n\t                var t2l = sigma0l + majl;\n\t                var t2h = sigma0h + majh + ((t2l >>> 0) < (sigma0l >>> 0) ? 1 : 0);\n\n\t                // Update working variables\n\t                hh = gh;\n\t                hl = gl;\n\t                gh = fh;\n\t                gl = fl;\n\t                fh = eh;\n\t                fl = el;\n\t                el = (dl + t1l) | 0;\n\t                eh = (dh + t1h + ((el >>> 0) < (dl >>> 0) ? 1 : 0)) | 0;\n\t                dh = ch;\n\t                dl = cl;\n\t                ch = bh;\n\t                cl = bl;\n\t                bh = ah;\n\t                bl = al;\n\t                al = (t1l + t2l) | 0;\n\t                ah = (t1h + t2h + ((al >>> 0) < (t1l >>> 0) ? 1 : 0)) | 0;\n\t            }\n\n\t            // Intermediate hash value\n\t            H0l = H0.low  = (H0l + al);\n\t            H0.high = (H0h + ah + ((H0l >>> 0) < (al >>> 0) ? 1 : 0));\n\t            H1l = H1.low  = (H1l + bl);\n\t            H1.high = (H1h + bh + ((H1l >>> 0) < (bl >>> 0) ? 1 : 0));\n\t            H2l = H2.low  = (H2l + cl);\n\t            H2.high = (H2h + ch + ((H2l >>> 0) < (cl >>> 0) ? 1 : 0));\n\t            H3l = H3.low  = (H3l + dl);\n\t            H3.high = (H3h + dh + ((H3l >>> 0) < (dl >>> 0) ? 1 : 0));\n\t            H4l = H4.low  = (H4l + el);\n\t            H4.high = (H4h + eh + ((H4l >>> 0) < (el >>> 0) ? 1 : 0));\n\t            H5l = H5.low  = (H5l + fl);\n\t            H5.high = (H5h + fh + ((H5l >>> 0) < (fl >>> 0) ? 1 : 0));\n\t            H6l = H6.low  = (H6l + gl);\n\t            H6.high = (H6h + gh + ((H6l >>> 0) < (gl >>> 0) ? 1 : 0));\n\t            H7l = H7.low  = (H7l + hl);\n\t            H7.high = (H7h + hh + ((H7l >>> 0) < (hl >>> 0) ? 1 : 0));\n\t        },\n\n\t        _doFinalize: function () {\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\n\t            var nBitsTotal = this._nDataBytes * 8;\n\t            var nBitsLeft = data.sigBytes * 8;\n\n\t            // Add padding\n\t            dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);\n\t            dataWords[(((nBitsLeft + 128) >>> 10) << 5) + 30] = Math.floor(nBitsTotal / 0x100000000);\n\t            dataWords[(((nBitsLeft + 128) >>> 10) << 5) + 31] = nBitsTotal;\n\t            data.sigBytes = dataWords.length * 4;\n\n\t            // Hash final blocks\n\t            this._process();\n\n\t            // Convert hash to 32-bit word array before returning\n\t            var hash = this._hash.toX32();\n\n\t            // Return final computed hash\n\t            return hash;\n\t        },\n\n\t        clone: function () {\n\t            var clone = Hasher.clone.call(this);\n\t            clone._hash = this._hash.clone();\n\n\t            return clone;\n\t        },\n\n\t        blockSize: 1024/32\n\t    });\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.SHA512('message');\n\t     *     var hash = CryptoJS.SHA512(wordArray);\n\t     */\n\t    C.SHA512 = Hasher._createHelper(SHA512);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacSHA512(message, key);\n\t     */\n\t    C.HmacSHA512 = Hasher._createHmacHelper(SHA512);\n\t}());\n\n\n\treturn CryptoJS.SHA512;\n\n}));","/**\n * @file stream.js\n */\n\n/**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\nvar Stream = /*#__PURE__*/function () {\n  function Stream() {\n    this.listeners = {};\n  }\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n\n  var _proto = Stream.prototype;\n\n  _proto.on = function on(type, listener) {\n    if (!this.listeners[type]) {\n      this.listeners[type] = [];\n    }\n\n    this.listeners[type].push(listener);\n  }\n  /**\n   * Remove a listener for a specified event type.\n   *\n   * @param {string} type the event name\n   * @param {Function} listener  a function previously registered for this\n   * type of event through `on`\n   * @return {boolean} if we could turn it off or not\n   */\n  ;\n\n  _proto.off = function off(type, listener) {\n    if (!this.listeners[type]) {\n      return false;\n    }\n\n    var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n    // In Video.js we slice listener functions\n    // on trigger so that it does not mess up the order\n    // while we loop through.\n    //\n    // Here we slice on off so that the loop in trigger\n    // can continue using it's old reference to loop without\n    // messing up the order.\n\n    this.listeners[type] = this.listeners[type].slice(0);\n    this.listeners[type].splice(index, 1);\n    return index > -1;\n  }\n  /**\n   * Trigger an event of the specified type on this stream. Any additional\n   * arguments to this function are passed as parameters to event listeners.\n   *\n   * @param {string} type the event name\n   */\n  ;\n\n  _proto.trigger = function trigger(type) {\n    var callbacks = this.listeners[type];\n\n    if (!callbacks) {\n      return;\n    } // Slicing the arguments on every invocation of this method\n    // can add a significant amount of overhead. Avoid the\n    // intermediate object creation for the common case of a\n    // single callback argument\n\n\n    if (arguments.length === 2) {\n      var length = callbacks.length;\n\n      for (var i = 0; i < length; ++i) {\n        callbacks[i].call(this, arguments[1]);\n      }\n    } else {\n      var args = Array.prototype.slice.call(arguments, 1);\n      var _length = callbacks.length;\n\n      for (var _i = 0; _i < _length; ++_i) {\n        callbacks[_i].apply(this, args);\n      }\n    }\n  }\n  /**\n   * Destroys the stream and cleans up.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.listeners = {};\n  }\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   *\n   * @param {Stream} destination the stream that will receive all `data` events\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n  ;\n\n  _proto.pipe = function pipe(destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n  };\n\n  return Stream;\n}();\n\nexport { Stream as default };","/*! @name m3u8-parser @version 4.8.0 @license Apache-2.0 */\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport Stream from '@videojs/vhs-utils/es/stream.js';\nimport _extends from '@babel/runtime/helpers/extends';\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport decodeB64ToUint8Array from '@videojs/vhs-utils/es/decode-b64-to-uint8-array.js';\n\n/**\n * A stream that buffers string input and generates a `data` event for each\n * line.\n *\n * @class LineStream\n * @extends Stream\n */\n\nvar LineStream = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(LineStream, _Stream);\n\n  function LineStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.buffer = '';\n    return _this;\n  }\n  /**\n   * Add new data to be parsed.\n   *\n   * @param {string} data the text to process\n   */\n\n\n  var _proto = LineStream.prototype;\n\n  _proto.push = function push(data) {\n    var nextNewline;\n    this.buffer += data;\n    nextNewline = this.buffer.indexOf('\\n');\n\n    for (; nextNewline > -1; nextNewline = this.buffer.indexOf('\\n')) {\n      this.trigger('data', this.buffer.substring(0, nextNewline));\n      this.buffer = this.buffer.substring(nextNewline + 1);\n    }\n  };\n\n  return LineStream;\n}(Stream);\n\nvar TAB = String.fromCharCode(0x09);\n\nvar parseByterange = function parseByterange(byterangeString) {\n  // optionally match and capture 0+ digits before `@`\n  // optionally match and capture 0+ digits after `@`\n  var match = /([0-9.]*)?@?([0-9.]*)?/.exec(byterangeString || '');\n  var result = {};\n\n  if (match[1]) {\n    result.length = parseInt(match[1], 10);\n  }\n\n  if (match[2]) {\n    result.offset = parseInt(match[2], 10);\n  }\n\n  return result;\n};\n/**\n * \"forgiving\" attribute list psuedo-grammar:\n * attributes -> keyvalue (',' keyvalue)*\n * keyvalue   -> key '=' value\n * key        -> [^=]*\n * value      -> '\"' [^\"]* '\"' | [^,]*\n */\n\n\nvar attributeSeparator = function attributeSeparator() {\n  var key = '[^=]*';\n  var value = '\"[^\"]*\"|[^,]*';\n  var keyvalue = '(?:' + key + ')=(?:' + value + ')';\n  return new RegExp('(?:^|,)(' + keyvalue + ')');\n};\n/**\n * Parse attributes from a line given the separator\n *\n * @param {string} attributes the attribute line to parse\n */\n\n\nvar parseAttributes = function parseAttributes(attributes) {\n  // split the string using attributes as the separator\n  var attrs = attributes.split(attributeSeparator());\n  var result = {};\n  var i = attrs.length;\n  var attr;\n\n  while (i--) {\n    // filter out unmatched portions of the string\n    if (attrs[i] === '') {\n      continue;\n    } // split the key and value\n\n\n    attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1); // trim whitespace and remove optional quotes around the value\n\n    attr[0] = attr[0].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^['\"](.*)['\"]$/g, '$1');\n    result[attr[0]] = attr[1];\n  }\n\n  return result;\n};\n/**\n * A line-level M3U8 parser event stream. It expects to receive input one\n * line at a time and performs a context-free parse of its contents. A stream\n * interpretation of a manifest can be useful if the manifest is expected to\n * be too large to fit comfortably into memory or the entirety of the input\n * is not immediately available. Otherwise, it's probably much easier to work\n * with a regular `Parser` object.\n *\n * Produces `data` events with an object that captures the parser's\n * interpretation of the input. That object has a property `tag` that is one\n * of `uri`, `comment`, or `tag`. URIs only have a single additional\n * property, `line`, which captures the entirety of the input without\n * interpretation. Comments similarly have a single additional property\n * `text` which is the input without the leading `#`.\n *\n * Tags always have a property `tagType` which is the lower-cased version of\n * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,\n * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized\n * tags are given the tag type `unknown` and a single additional property\n * `data` with the remainder of the input.\n *\n * @class ParseStream\n * @extends Stream\n */\n\n\nvar ParseStream = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(ParseStream, _Stream);\n\n  function ParseStream() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.customParsers = [];\n    _this.tagMappers = [];\n    return _this;\n  }\n  /**\n   * Parses an additional line of input.\n   *\n   * @param {string} line a single line of an M3U8 file to parse\n   */\n\n\n  var _proto = ParseStream.prototype;\n\n  _proto.push = function push(line) {\n    var _this2 = this;\n\n    var match;\n    var event; // strip whitespace\n\n    line = line.trim();\n\n    if (line.length === 0) {\n      // ignore empty lines\n      return;\n    } // URIs\n\n\n    if (line[0] !== '#') {\n      this.trigger('data', {\n        type: 'uri',\n        uri: line\n      });\n      return;\n    } // map tags\n\n\n    var newLines = this.tagMappers.reduce(function (acc, mapper) {\n      var mappedLine = mapper(line); // skip if unchanged\n\n      if (mappedLine === line) {\n        return acc;\n      }\n\n      return acc.concat([mappedLine]);\n    }, [line]);\n    newLines.forEach(function (newLine) {\n      for (var i = 0; i < _this2.customParsers.length; i++) {\n        if (_this2.customParsers[i].call(_this2, newLine)) {\n          return;\n        }\n      } // Comments\n\n\n      if (newLine.indexOf('#EXT') !== 0) {\n        _this2.trigger('data', {\n          type: 'comment',\n          text: newLine.slice(1)\n        });\n\n        return;\n      } // strip off any carriage returns here so the regex matching\n      // doesn't have to account for them.\n\n\n      newLine = newLine.replace('\\r', ''); // Tags\n\n      match = /^#EXTM3U/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'm3u'\n        });\n\n        return;\n      }\n\n      match = /^#EXTINF:?([0-9\\.]*)?,?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'inf'\n        };\n\n        if (match[1]) {\n          event.duration = parseFloat(match[1]);\n        }\n\n        if (match[2]) {\n          event.title = match[2];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'targetduration'\n        };\n\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'version'\n        };\n\n        if (match[1]) {\n          event.version = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\\-?[0-9.]*)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'discontinuity-sequence'\n        };\n\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'playlist-type'\n        };\n\n        if (match[1]) {\n          event.playlistType = match[1];\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-BYTERANGE:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = _extends(parseByterange(match[1]), {\n          type: 'tag',\n          tagType: 'byterange'\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'allow-cache'\n        };\n\n        if (match[1]) {\n          event.allowed = !/NO/.test(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MAP:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'map'\n        };\n\n        if (match[1]) {\n          var attributes = parseAttributes(match[1]);\n\n          if (attributes.URI) {\n            event.uri = attributes.URI;\n          }\n\n          if (attributes.BYTERANGE) {\n            event.byterange = parseByterange(attributes.BYTERANGE);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'stream-inf'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n\n          if (event.attributes.RESOLUTION) {\n            var split = event.attributes.RESOLUTION.split('x');\n            var resolution = {};\n\n            if (split[0]) {\n              resolution.width = parseInt(split[0], 10);\n            }\n\n            if (split[1]) {\n              resolution.height = parseInt(split[1], 10);\n            }\n\n            event.attributes.RESOLUTION = resolution;\n          }\n\n          if (event.attributes.BANDWIDTH) {\n            event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);\n          }\n\n          if (event.attributes['FRAME-RATE']) {\n            event.attributes['FRAME-RATE'] = parseFloat(event.attributes['FRAME-RATE']);\n          }\n\n          if (event.attributes['PROGRAM-ID']) {\n            event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-MEDIA:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-ENDLIST/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'endlist'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-DISCONTINUITY/.exec(newLine);\n\n      if (match) {\n        _this2.trigger('data', {\n          type: 'tag',\n          tagType: 'discontinuity'\n        });\n\n        return;\n      }\n\n      match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'program-date-time'\n        };\n\n        if (match[1]) {\n          event.dateTimeString = match[1];\n          event.dateTimeObject = new Date(match[1]);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-KEY:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'key'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]); // parse the IV string into a Uint32Array\n\n          if (event.attributes.IV) {\n            if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {\n              event.attributes.IV = event.attributes.IV.substring(2);\n            }\n\n            event.attributes.IV = event.attributes.IV.match(/.{8}/g);\n            event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);\n            event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);\n            event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);\n            event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);\n            event.attributes.IV = new Uint32Array(event.attributes.IV);\n          }\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-START:?(.*)$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'start'\n        };\n\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n          event.attributes['TIME-OFFSET'] = parseFloat(event.attributes['TIME-OFFSET']);\n          event.attributes.PRECISE = /YES/.test(event.attributes.PRECISE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out-cont'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(newLine);\n\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-in'\n        };\n\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-SKIP:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'skip'\n        };\n        event.attributes = parseAttributes(match[1]);\n\n        if (event.attributes.hasOwnProperty('SKIPPED-SEGMENTS')) {\n          event.attributes['SKIPPED-SEGMENTS'] = parseInt(event.attributes['SKIPPED-SEGMENTS'], 10);\n        }\n\n        if (event.attributes.hasOwnProperty('RECENTLY-REMOVED-DATERANGES')) {\n          event.attributes['RECENTLY-REMOVED-DATERANGES'] = event.attributes['RECENTLY-REMOVED-DATERANGES'].split(TAB);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PART:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'part'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['DURATION'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n        ['INDEPENDENT', 'GAP'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = /YES/.test(event.attributes[key]);\n          }\n        });\n\n        if (event.attributes.hasOwnProperty('BYTERANGE')) {\n          event.attributes.byterange = parseByterange(event.attributes.BYTERANGE);\n        }\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-SERVER-CONTROL:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'server-control'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['CAN-SKIP-UNTIL', 'PART-HOLD-BACK', 'HOLD-BACK'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n        ['CAN-SKIP-DATERANGES', 'CAN-BLOCK-RELOAD'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = /YES/.test(event.attributes[key]);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PART-INF:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'part-inf'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['PART-TARGET'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseFloat(event.attributes[key]);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-PRELOAD-HINT:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'preload-hint'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['BYTERANGE-START', 'BYTERANGE-LENGTH'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseInt(event.attributes[key], 10);\n            var subkey = key === 'BYTERANGE-LENGTH' ? 'length' : 'offset';\n            event.attributes.byterange = event.attributes.byterange || {};\n            event.attributes.byterange[subkey] = event.attributes[key]; // only keep the parsed byterange object.\n\n            delete event.attributes[key];\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      }\n\n      match = /^#EXT-X-RENDITION-REPORT:(.*)$/.exec(newLine);\n\n      if (match && match[1]) {\n        event = {\n          type: 'tag',\n          tagType: 'rendition-report'\n        };\n        event.attributes = parseAttributes(match[1]);\n        ['LAST-MSN', 'LAST-PART'].forEach(function (key) {\n          if (event.attributes.hasOwnProperty(key)) {\n            event.attributes[key] = parseInt(event.attributes[key], 10);\n          }\n        });\n\n        _this2.trigger('data', event);\n\n        return;\n      } // unknown tag type\n\n\n      _this2.trigger('data', {\n        type: 'tag',\n        data: newLine.slice(4)\n      });\n    });\n  }\n  /**\n   * Add a parser for custom headers\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.customType   the custom type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(_ref) {\n    var _this3 = this;\n\n    var expression = _ref.expression,\n        customType = _ref.customType,\n        dataParser = _ref.dataParser,\n        segment = _ref.segment;\n\n    if (typeof dataParser !== 'function') {\n      dataParser = function dataParser(line) {\n        return line;\n      };\n    }\n\n    this.customParsers.push(function (line) {\n      var match = expression.exec(line);\n\n      if (match) {\n        _this3.trigger('data', {\n          type: 'custom',\n          data: dataParser(line),\n          customType: customType,\n          segment: segment\n        });\n\n        return true;\n      }\n    });\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(_ref2) {\n    var expression = _ref2.expression,\n        map = _ref2.map;\n\n    var mapFn = function mapFn(line) {\n      if (expression.test(line)) {\n        return map(line);\n      }\n\n      return line;\n    };\n\n    this.tagMappers.push(mapFn);\n  };\n\n  return ParseStream;\n}(Stream);\n\nvar camelCase = function camelCase(str) {\n  return str.toLowerCase().replace(/-(\\w)/g, function (a) {\n    return a[1].toUpperCase();\n  });\n};\n\nvar camelCaseKeys = function camelCaseKeys(attributes) {\n  var result = {};\n  Object.keys(attributes).forEach(function (key) {\n    result[camelCase(key)] = attributes[key];\n  });\n  return result;\n}; // set SERVER-CONTROL hold back based upon targetDuration and partTargetDuration\n// we need this helper because defaults are based upon targetDuration and\n// partTargetDuration being set, but they may not be if SERVER-CONTROL appears before\n// target durations are set.\n\n\nvar setHoldBack = function setHoldBack(manifest) {\n  var serverControl = manifest.serverControl,\n      targetDuration = manifest.targetDuration,\n      partTargetDuration = manifest.partTargetDuration;\n\n  if (!serverControl) {\n    return;\n  }\n\n  var tag = '#EXT-X-SERVER-CONTROL';\n  var hb = 'holdBack';\n  var phb = 'partHoldBack';\n  var minTargetDuration = targetDuration && targetDuration * 3;\n  var minPartDuration = partTargetDuration && partTargetDuration * 2;\n\n  if (targetDuration && !serverControl.hasOwnProperty(hb)) {\n    serverControl[hb] = minTargetDuration;\n    this.trigger('info', {\n      message: tag + \" defaulting HOLD-BACK to targetDuration * 3 (\" + minTargetDuration + \").\"\n    });\n  }\n\n  if (minTargetDuration && serverControl[hb] < minTargetDuration) {\n    this.trigger('warn', {\n      message: tag + \" clamping HOLD-BACK (\" + serverControl[hb] + \") to targetDuration * 3 (\" + minTargetDuration + \")\"\n    });\n    serverControl[hb] = minTargetDuration;\n  } // default no part hold back to part target duration * 3\n\n\n  if (partTargetDuration && !serverControl.hasOwnProperty(phb)) {\n    serverControl[phb] = partTargetDuration * 3;\n    this.trigger('info', {\n      message: tag + \" defaulting PART-HOLD-BACK to partTargetDuration * 3 (\" + serverControl[phb] + \").\"\n    });\n  } // if part hold back is too small default it to part target duration * 2\n\n\n  if (partTargetDuration && serverControl[phb] < minPartDuration) {\n    this.trigger('warn', {\n      message: tag + \" clamping PART-HOLD-BACK (\" + serverControl[phb] + \") to partTargetDuration * 2 (\" + minPartDuration + \").\"\n    });\n    serverControl[phb] = minPartDuration;\n  }\n};\n/**\n * A parser for M3U8 files. The current interpretation of the input is\n * exposed as a property `manifest` on parser objects. It's just two lines to\n * create and parse a manifest once you have the contents available as a string:\n *\n * ```js\n * var parser = new m3u8.Parser();\n * parser.push(xhr.responseText);\n * ```\n *\n * New input can later be applied to update the manifest object by calling\n * `push` again.\n *\n * The parser attempts to create a usable manifest object even if the\n * underlying input is somewhat nonsensical. It emits `info` and `warning`\n * events during the parse if it encounters input that seems invalid or\n * requires some property of the manifest object to be defaulted.\n *\n * @class Parser\n * @extends Stream\n */\n\n\nvar Parser = /*#__PURE__*/function (_Stream) {\n  _inheritsLoose(Parser, _Stream);\n\n  function Parser() {\n    var _this;\n\n    _this = _Stream.call(this) || this;\n    _this.lineStream = new LineStream();\n    _this.parseStream = new ParseStream();\n\n    _this.lineStream.pipe(_this.parseStream);\n    /* eslint-disable consistent-this */\n\n\n    var self = _assertThisInitialized(_this);\n    /* eslint-enable consistent-this */\n\n\n    var uris = [];\n    var currentUri = {}; // if specified, the active EXT-X-MAP definition\n\n    var currentMap; // if specified, the active decryption key\n\n    var _key;\n\n    var hasParts = false;\n\n    var noop = function noop() {};\n\n    var defaultMediaGroups = {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    }; // This is the Widevine UUID from DASH IF IOP. The same exact string is\n    // used in MPDs with Widevine encrypted streams.\n\n    var widevineUuid = 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed'; // group segments into numbered timelines delineated by discontinuities\n\n    var currentTimeline = 0; // the manifest is empty until the parse stream begins delivering data\n\n    _this.manifest = {\n      allowCache: true,\n      discontinuityStarts: [],\n      segments: []\n    }; // keep track of the last seen segment's byte range end, as segments are not required\n    // to provide the offset, in which case it defaults to the next byte after the\n    // previous segment\n\n    var lastByterangeEnd = 0; // keep track of the last seen part's byte range end.\n\n    var lastPartByterangeEnd = 0;\n\n    _this.on('end', function () {\n      // only add preloadSegment if we don't yet have a uri for it.\n      // and we actually have parts/preloadHints\n      if (currentUri.uri || !currentUri.parts && !currentUri.preloadHints) {\n        return;\n      }\n\n      if (!currentUri.map && currentMap) {\n        currentUri.map = currentMap;\n      }\n\n      if (!currentUri.key && _key) {\n        currentUri.key = _key;\n      }\n\n      if (!currentUri.timeline && typeof currentTimeline === 'number') {\n        currentUri.timeline = currentTimeline;\n      }\n\n      _this.manifest.preloadSegment = currentUri;\n    }); // update the manifest with the m3u8 entry from the parse stream\n\n\n    _this.parseStream.on('data', function (entry) {\n      var mediaGroup;\n      var rendition;\n      ({\n        tag: function tag() {\n          // switch based on the tag type\n          (({\n            version: function version() {\n              if (entry.version) {\n                this.manifest.version = entry.version;\n              }\n            },\n            'allow-cache': function allowCache() {\n              this.manifest.allowCache = entry.allowed;\n\n              if (!('allowed' in entry)) {\n                this.trigger('info', {\n                  message: 'defaulting allowCache to YES'\n                });\n                this.manifest.allowCache = true;\n              }\n            },\n            byterange: function byterange() {\n              var byterange = {};\n\n              if ('length' in entry) {\n                currentUri.byterange = byterange;\n                byterange.length = entry.length;\n\n                if (!('offset' in entry)) {\n                  /*\n                   * From the latest spec (as of this writing):\n                   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.2\n                   *\n                   * Same text since EXT-X-BYTERANGE's introduction in draft 7:\n                   * https://tools.ietf.org/html/draft-pantos-http-live-streaming-07#section-3.3.1)\n                   *\n                   * \"If o [offset] is not present, the sub-range begins at the next byte\n                   * following the sub-range of the previous media segment.\"\n                   */\n                  entry.offset = lastByterangeEnd;\n                }\n              }\n\n              if ('offset' in entry) {\n                currentUri.byterange = byterange;\n                byterange.offset = entry.offset;\n              }\n\n              lastByterangeEnd = byterange.offset + byterange.length;\n            },\n            endlist: function endlist() {\n              this.manifest.endList = true;\n            },\n            inf: function inf() {\n              if (!('mediaSequence' in this.manifest)) {\n                this.manifest.mediaSequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting media sequence to zero'\n                });\n              }\n\n              if (!('discontinuitySequence' in this.manifest)) {\n                this.manifest.discontinuitySequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting discontinuity sequence to zero'\n                });\n              }\n\n              if (entry.duration > 0) {\n                currentUri.duration = entry.duration;\n              }\n\n              if (entry.duration === 0) {\n                currentUri.duration = 0.01;\n                this.trigger('info', {\n                  message: 'updating zero segment duration to a small value'\n                });\n              }\n\n              this.manifest.segments = uris;\n            },\n            key: function key() {\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without attribute list'\n                });\n                return;\n              } // clear the active encryption key\n\n\n              if (entry.attributes.METHOD === 'NONE') {\n                _key = null;\n                return;\n              }\n\n              if (!entry.attributes.URI) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without URI'\n                });\n                return;\n              }\n\n              if (entry.attributes.KEYFORMAT === 'com.apple.streamingkeydelivery') {\n                this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n                this.manifest.contentProtection['com.apple.fps.1_0'] = {\n                  attributes: entry.attributes\n                };\n                return;\n              }\n\n              if (entry.attributes.KEYFORMAT === 'com.microsoft.playready') {\n                this.manifest.contentProtection = this.manifest.contentProtection || {}; // TODO: add full support for this.\n\n                this.manifest.contentProtection['com.microsoft.playready'] = {\n                  uri: entry.attributes.URI\n                };\n                return;\n              } // check if the content is encrypted for Widevine\n              // Widevine/HLS spec: https://storage.googleapis.com/wvdocs/Widevine_DRM_HLS.pdf\n\n\n              if (entry.attributes.KEYFORMAT === widevineUuid) {\n                var VALID_METHODS = ['SAMPLE-AES', 'SAMPLE-AES-CTR', 'SAMPLE-AES-CENC'];\n\n                if (VALID_METHODS.indexOf(entry.attributes.METHOD) === -1) {\n                  this.trigger('warn', {\n                    message: 'invalid key method provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (entry.attributes.METHOD === 'SAMPLE-AES-CENC') {\n                  this.trigger('warn', {\n                    message: 'SAMPLE-AES-CENC is deprecated, please use SAMPLE-AES-CTR instead'\n                  });\n                }\n\n                if (entry.attributes.URI.substring(0, 23) !== 'data:text/plain;base64,') {\n                  this.trigger('warn', {\n                    message: 'invalid key URI provided for Widevine'\n                  });\n                  return;\n                }\n\n                if (!(entry.attributes.KEYID && entry.attributes.KEYID.substring(0, 2) === '0x')) {\n                  this.trigger('warn', {\n                    message: 'invalid key ID provided for Widevine'\n                  });\n                  return;\n                } // if Widevine key attributes are valid, store them as `contentProtection`\n                // on the manifest to emulate Widevine tag structure in a DASH mpd\n\n\n                this.manifest.contentProtection = this.manifest.contentProtection || {};\n                this.manifest.contentProtection['com.widevine.alpha'] = {\n                  attributes: {\n                    schemeIdUri: entry.attributes.KEYFORMAT,\n                    // remove '0x' from the key id string\n                    keyId: entry.attributes.KEYID.substring(2)\n                  },\n                  // decode the base64-encoded PSSH box\n                  pssh: decodeB64ToUint8Array(entry.attributes.URI.split(',')[1])\n                };\n                return;\n              }\n\n              if (!entry.attributes.METHOD) {\n                this.trigger('warn', {\n                  message: 'defaulting key method to AES-128'\n                });\n              } // setup an encryption key for upcoming segments\n\n\n              _key = {\n                method: entry.attributes.METHOD || 'AES-128',\n                uri: entry.attributes.URI\n              };\n\n              if (typeof entry.attributes.IV !== 'undefined') {\n                _key.iv = entry.attributes.IV;\n              }\n            },\n            'media-sequence': function mediaSequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid media sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.mediaSequence = entry.number;\n            },\n            'discontinuity-sequence': function discontinuitySequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid discontinuity sequence: ' + entry.number\n                });\n                return;\n              }\n\n              this.manifest.discontinuitySequence = entry.number;\n              currentTimeline = entry.number;\n            },\n            'playlist-type': function playlistType() {\n              if (!/VOD|EVENT/.test(entry.playlistType)) {\n                this.trigger('warn', {\n                  message: 'ignoring unknown playlist type: ' + entry.playlist\n                });\n                return;\n              }\n\n              this.manifest.playlistType = entry.playlistType;\n            },\n            map: function map() {\n              currentMap = {};\n\n              if (entry.uri) {\n                currentMap.uri = entry.uri;\n              }\n\n              if (entry.byterange) {\n                currentMap.byterange = entry.byterange;\n              }\n\n              if (_key) {\n                currentMap.key = _key;\n              }\n            },\n            'stream-inf': function streamInf() {\n              this.manifest.playlists = uris;\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring empty stream-inf attributes'\n                });\n                return;\n              }\n\n              if (!currentUri.attributes) {\n                currentUri.attributes = {};\n              }\n\n              _extends(currentUri.attributes, entry.attributes);\n            },\n            media: function media() {\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {\n                this.trigger('warn', {\n                  message: 'ignoring incomplete or missing media group'\n                });\n                return;\n              } // find the media group, creating defaults as necessary\n\n\n              var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];\n              mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};\n              mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']]; // collect the rendition metadata\n\n              rendition = {\n                default: /yes/i.test(entry.attributes.DEFAULT)\n              };\n\n              if (rendition.default) {\n                rendition.autoselect = true;\n              } else {\n                rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);\n              }\n\n              if (entry.attributes.LANGUAGE) {\n                rendition.language = entry.attributes.LANGUAGE;\n              }\n\n              if (entry.attributes.URI) {\n                rendition.uri = entry.attributes.URI;\n              }\n\n              if (entry.attributes['INSTREAM-ID']) {\n                rendition.instreamId = entry.attributes['INSTREAM-ID'];\n              }\n\n              if (entry.attributes.CHARACTERISTICS) {\n                rendition.characteristics = entry.attributes.CHARACTERISTICS;\n              }\n\n              if (entry.attributes.FORCED) {\n                rendition.forced = /yes/i.test(entry.attributes.FORCED);\n              } // insert the new rendition\n\n\n              mediaGroup[entry.attributes.NAME] = rendition;\n            },\n            discontinuity: function discontinuity() {\n              currentTimeline += 1;\n              currentUri.discontinuity = true;\n              this.manifest.discontinuityStarts.push(uris.length);\n            },\n            'program-date-time': function programDateTime() {\n              if (typeof this.manifest.dateTimeString === 'undefined') {\n                // PROGRAM-DATE-TIME is a media-segment tag, but for backwards\n                // compatibility, we add the first occurence of the PROGRAM-DATE-TIME tag\n                // to the manifest object\n                // TODO: Consider removing this in future major version\n                this.manifest.dateTimeString = entry.dateTimeString;\n                this.manifest.dateTimeObject = entry.dateTimeObject;\n              }\n\n              currentUri.dateTimeString = entry.dateTimeString;\n              currentUri.dateTimeObject = entry.dateTimeObject;\n            },\n            targetduration: function targetduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid target duration: ' + entry.duration\n                });\n                return;\n              }\n\n              this.manifest.targetDuration = entry.duration;\n              setHoldBack.call(this, this.manifest);\n            },\n            start: function start() {\n              if (!entry.attributes || isNaN(entry.attributes['TIME-OFFSET'])) {\n                this.trigger('warn', {\n                  message: 'ignoring start declaration without appropriate attribute list'\n                });\n                return;\n              }\n\n              this.manifest.start = {\n                timeOffset: entry.attributes['TIME-OFFSET'],\n                precise: entry.attributes.PRECISE\n              };\n            },\n            'cue-out': function cueOut() {\n              currentUri.cueOut = entry.data;\n            },\n            'cue-out-cont': function cueOutCont() {\n              currentUri.cueOutCont = entry.data;\n            },\n            'cue-in': function cueIn() {\n              currentUri.cueIn = entry.data;\n            },\n            'skip': function skip() {\n              this.manifest.skip = camelCaseKeys(entry.attributes);\n              this.warnOnMissingAttributes_('#EXT-X-SKIP', entry.attributes, ['SKIPPED-SEGMENTS']);\n            },\n            'part': function part() {\n              var _this2 = this;\n\n              hasParts = true; // parts are always specifed before a segment\n\n              var segmentIndex = this.manifest.segments.length;\n              var part = camelCaseKeys(entry.attributes);\n              currentUri.parts = currentUri.parts || [];\n              currentUri.parts.push(part);\n\n              if (part.byterange) {\n                if (!part.byterange.hasOwnProperty('offset')) {\n                  part.byterange.offset = lastPartByterangeEnd;\n                }\n\n                lastPartByterangeEnd = part.byterange.offset + part.byterange.length;\n              }\n\n              var partIndex = currentUri.parts.length - 1;\n              this.warnOnMissingAttributes_(\"#EXT-X-PART #\" + partIndex + \" for segment #\" + segmentIndex, entry.attributes, ['URI', 'DURATION']);\n\n              if (this.manifest.renditionReports) {\n                this.manifest.renditionReports.forEach(function (r, i) {\n                  if (!r.hasOwnProperty('lastPart')) {\n                    _this2.trigger('warn', {\n                      message: \"#EXT-X-RENDITION-REPORT #\" + i + \" lacks required attribute(s): LAST-PART\"\n                    });\n                  }\n                });\n              }\n            },\n            'server-control': function serverControl() {\n              var attrs = this.manifest.serverControl = camelCaseKeys(entry.attributes);\n\n              if (!attrs.hasOwnProperty('canBlockReload')) {\n                attrs.canBlockReload = false;\n                this.trigger('info', {\n                  message: '#EXT-X-SERVER-CONTROL defaulting CAN-BLOCK-RELOAD to false'\n                });\n              }\n\n              setHoldBack.call(this, this.manifest);\n\n              if (attrs.canSkipDateranges && !attrs.hasOwnProperty('canSkipUntil')) {\n                this.trigger('warn', {\n                  message: '#EXT-X-SERVER-CONTROL lacks required attribute CAN-SKIP-UNTIL which is required when CAN-SKIP-DATERANGES is set'\n                });\n              }\n            },\n            'preload-hint': function preloadHint() {\n              // parts are always specifed before a segment\n              var segmentIndex = this.manifest.segments.length;\n              var hint = camelCaseKeys(entry.attributes);\n              var isPart = hint.type && hint.type === 'PART';\n              currentUri.preloadHints = currentUri.preloadHints || [];\n              currentUri.preloadHints.push(hint);\n\n              if (hint.byterange) {\n                if (!hint.byterange.hasOwnProperty('offset')) {\n                  // use last part byterange end or zero if not a part.\n                  hint.byterange.offset = isPart ? lastPartByterangeEnd : 0;\n\n                  if (isPart) {\n                    lastPartByterangeEnd = hint.byterange.offset + hint.byterange.length;\n                  }\n                }\n              }\n\n              var index = currentUri.preloadHints.length - 1;\n              this.warnOnMissingAttributes_(\"#EXT-X-PRELOAD-HINT #\" + index + \" for segment #\" + segmentIndex, entry.attributes, ['TYPE', 'URI']);\n\n              if (!hint.type) {\n                return;\n              } // search through all preload hints except for the current one for\n              // a duplicate type.\n\n\n              for (var i = 0; i < currentUri.preloadHints.length - 1; i++) {\n                var otherHint = currentUri.preloadHints[i];\n\n                if (!otherHint.type) {\n                  continue;\n                }\n\n                if (otherHint.type === hint.type) {\n                  this.trigger('warn', {\n                    message: \"#EXT-X-PRELOAD-HINT #\" + index + \" for segment #\" + segmentIndex + \" has the same TYPE \" + hint.type + \" as preload hint #\" + i\n                  });\n                }\n              }\n            },\n            'rendition-report': function renditionReport() {\n              var report = camelCaseKeys(entry.attributes);\n              this.manifest.renditionReports = this.manifest.renditionReports || [];\n              this.manifest.renditionReports.push(report);\n              var index = this.manifest.renditionReports.length - 1;\n              var required = ['LAST-MSN', 'URI'];\n\n              if (hasParts) {\n                required.push('LAST-PART');\n              }\n\n              this.warnOnMissingAttributes_(\"#EXT-X-RENDITION-REPORT #\" + index, entry.attributes, required);\n            },\n            'part-inf': function partInf() {\n              this.manifest.partInf = camelCaseKeys(entry.attributes);\n              this.warnOnMissingAttributes_('#EXT-X-PART-INF', entry.attributes, ['PART-TARGET']);\n\n              if (this.manifest.partInf.partTarget) {\n                this.manifest.partTargetDuration = this.manifest.partInf.partTarget;\n              }\n\n              setHoldBack.call(this, this.manifest);\n            }\n          })[entry.tagType] || noop).call(self);\n        },\n        uri: function uri() {\n          currentUri.uri = entry.uri;\n          uris.push(currentUri); // if no explicit duration was declared, use the target duration\n\n          if (this.manifest.targetDuration && !('duration' in currentUri)) {\n            this.trigger('warn', {\n              message: 'defaulting segment duration to the target duration'\n            });\n            currentUri.duration = this.manifest.targetDuration;\n          } // annotate with encryption information, if necessary\n\n\n          if (_key) {\n            currentUri.key = _key;\n          }\n\n          currentUri.timeline = currentTimeline; // annotate with initialization segment information, if necessary\n\n          if (currentMap) {\n            currentUri.map = currentMap;\n          } // reset the last byterange end as it needs to be 0 between parts\n\n\n          lastPartByterangeEnd = 0; // prepare for the next URI\n\n          currentUri = {};\n        },\n        comment: function comment() {// comments are not important for playback\n        },\n        custom: function custom() {\n          // if this is segment-level data attach the output to the segment\n          if (entry.segment) {\n            currentUri.custom = currentUri.custom || {};\n            currentUri.custom[entry.customType] = entry.data; // if this is manifest-level data attach to the top level manifest object\n          } else {\n            this.manifest.custom = this.manifest.custom || {};\n            this.manifest.custom[entry.customType] = entry.data;\n          }\n        }\n      })[entry.type].call(self);\n    });\n\n    return _this;\n  }\n\n  var _proto = Parser.prototype;\n\n  _proto.warnOnMissingAttributes_ = function warnOnMissingAttributes_(identifier, attributes, required) {\n    var missing = [];\n    required.forEach(function (key) {\n      if (!attributes.hasOwnProperty(key)) {\n        missing.push(key);\n      }\n    });\n\n    if (missing.length) {\n      this.trigger('warn', {\n        message: identifier + \" lacks required attribute(s): \" + missing.join(', ')\n      });\n    }\n  }\n  /**\n   * Parse the input string and update the manifest object.\n   *\n   * @param {string} chunk a potentially incomplete portion of the manifest\n   */\n  ;\n\n  _proto.push = function push(chunk) {\n    this.lineStream.push(chunk);\n  }\n  /**\n   * Flush any remaining input. This can be handy if the last line of an M3U8\n   * manifest did not contain a trailing newline but the file has been\n   * completely received.\n   */\n  ;\n\n  _proto.end = function end() {\n    // flush any buffered input\n    this.lineStream.push('\\n');\n    this.trigger('end');\n  }\n  /**\n   * Add an additional parser for non-standard tags\n   *\n   * @param {Object}   options              a map of options for the added parser\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {string}   options.type         the type to register to the output\n   * @param {Function} [options.dataParser] function to parse the line into an object\n   * @param {boolean}  [options.segment]    should tag data be attached to the segment object\n   */\n  ;\n\n  _proto.addParser = function addParser(options) {\n    this.parseStream.addParser(options);\n  }\n  /**\n   * Add a custom header mapper\n   *\n   * @param {Object}   options\n   * @param {RegExp}   options.expression   a regular expression to match the custom header\n   * @param {Function} options.map          function to translate tag into a different tag\n   */\n  ;\n\n  _proto.addTagMapper = function addTagMapper(options) {\n    this.parseStream.addTagMapper(options);\n  };\n\n  return Parser;\n}(Stream);\n\nexport { LineStream, ParseStream, Parser };\n","'use strict';\n// TODO: Remove from `core-js@4` since it's moved to entry points\nrequire('../modules/es.regexp.exec');\nvar redefine = require('../internals/redefine');\nvar fails = require('../internals/fails');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar regexpExec = require('../internals/regexp-exec');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\n\nvar SPECIES = wellKnownSymbol('species');\n\nvar REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {\n  // #replace needs built-in support for named groups.\n  // #match works fine because it just return the exec results, even if it has\n  // a \"grops\" property.\n  var re = /./;\n  re.exec = function () {\n    var result = [];\n    result.groups = { a: '7' };\n    return result;\n  };\n  return ''.replace(re, '$<a>') !== '7';\n});\n\n// IE <= 11 replaces $0 with the whole match, as if it was $&\n// https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0\nvar REPLACE_KEEPS_$0 = (function () {\n  // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing\n  return 'a'.replace(/./, '$0') === '$0';\n})();\n\nvar REPLACE = wellKnownSymbol('replace');\n// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string\nvar REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {\n  if (/./[REPLACE]) {\n    return /./[REPLACE]('a', '$0') === '';\n  }\n  return false;\n})();\n\n// Chrome 51 has a buggy \"split\" implementation when RegExp#exec !== nativeExec\n// Weex JS has frozen built-in prototypes, so use try / catch wrapper\nvar SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {\n  // eslint-disable-next-line regexp/no-empty-group -- required for testing\n  var re = /(?:)/;\n  var originalExec = re.exec;\n  re.exec = function () { return originalExec.apply(this, arguments); };\n  var result = 'ab'.split(re);\n  return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';\n});\n\nmodule.exports = function (KEY, length, exec, sham) {\n  var SYMBOL = wellKnownSymbol(KEY);\n\n  var DELEGATES_TO_SYMBOL = !fails(function () {\n    // String methods call symbol-named RegEp methods\n    var O = {};\n    O[SYMBOL] = function () { return 7; };\n    return ''[KEY](O) != 7;\n  });\n\n  var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {\n    // Symbol-named RegExp methods call .exec\n    var execCalled = false;\n    var re = /a/;\n\n    if (KEY === 'split') {\n      // We can't use real regex here since it causes deoptimization\n      // and serious performance degradation in V8\n      // https://github.com/zloirock/core-js/issues/306\n      re = {};\n      // RegExp[@@split] doesn't call the regex's exec method, but first creates\n      // a new one. We need to return the patched regex when creating the new one.\n      re.constructor = {};\n      re.constructor[SPECIES] = function () { return re; };\n      re.flags = '';\n      re[SYMBOL] = /./[SYMBOL];\n    }\n\n    re.exec = function () { execCalled = true; return null; };\n\n    re[SYMBOL]('');\n    return !execCalled;\n  });\n\n  if (\n    !DELEGATES_TO_SYMBOL ||\n    !DELEGATES_TO_EXEC ||\n    (KEY === 'replace' && !(\n      REPLACE_SUPPORTS_NAMED_GROUPS &&\n      REPLACE_KEEPS_$0 &&\n      !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE\n    )) ||\n    (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)\n  ) {\n    var nativeRegExpMethod = /./[SYMBOL];\n    var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {\n      if (regexp.exec === regexpExec) {\n        if (DELEGATES_TO_SYMBOL && !forceStringMethod) {\n          // The native String method already delegates to @@method (this\n          // polyfilled function), leasing to infinite recursion.\n          // We avoid it by directly calling the native @@method method.\n          return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };\n        }\n        return { done: true, value: nativeMethod.call(str, regexp, arg2) };\n      }\n      return { done: false };\n    }, {\n      REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,\n      REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE\n    });\n    var stringMethod = methods[0];\n    var regexMethod = methods[1];\n\n    redefine(String.prototype, KEY, stringMethod);\n    redefine(RegExp.prototype, SYMBOL, length == 2\n      // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)\n      // 21.2.5.11 RegExp.prototype[@@split](string, limit)\n      ? function (string, arg) { return regexMethod.call(string, this, arg); }\n      // 21.2.5.6 RegExp.prototype[@@match](string)\n      // 21.2.5.9 RegExp.prototype[@@search](string)\n      : function (string) { return regexMethod.call(string, this); }\n    );\n  }\n\n  if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar $map = require('../internals/array-iteration').map;\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');\n\n// `Array.prototype.map` method\n// https://tc39.es/ecma262/#sec-array.prototype.map\n// with adding support of @@species\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {\n  map: function map(callbackfn /* , thisArg */) {\n    return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);\n  }\n});\n","/**\n * mux.js\n *\n * Copyright (c) 2016 Brightcove\n * All rights reserved.\n *\n * Utilities to detect basic properties and metadata about Aac data.\n */\n'use strict';\n\nvar ADTS_SAMPLING_FREQUENCIES = [\n  96000,\n  88200,\n  64000,\n  48000,\n  44100,\n  32000,\n  24000,\n  22050,\n  16000,\n  12000,\n  11025,\n  8000,\n  7350\n];\n\nvar parseSyncSafeInteger = function(data) {\n  return (data[0] << 21) |\n          (data[1] << 14) |\n          (data[2] << 7) |\n          (data[3]);\n};\n\n// return a percent-encoded representation of the specified byte range\n// @see http://en.wikipedia.org/wiki/Percent-encoding\nvar percentEncode = function(bytes, start, end) {\n  var i, result = '';\n  for (i = start; i < end; i++) {\n    result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n  }\n  return result;\n};\n\n// return the string representation of the specified byte range,\n// interpreted as ISO-8859-1.\nvar parseIso88591 = function(bytes, start, end) {\n  return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n};\n\nvar parseId3TagSize = function(header, byteIndex) {\n  var\n    returnSize = (header[byteIndex + 6] << 21) |\n                 (header[byteIndex + 7] << 14) |\n                 (header[byteIndex + 8] << 7) |\n                 (header[byteIndex + 9]),\n    flags = header[byteIndex + 5],\n    footerPresent = (flags & 16) >> 4;\n\n  if (footerPresent) {\n    return returnSize + 20;\n  }\n  return returnSize + 10;\n};\n\nvar parseAdtsSize = function(header, byteIndex) {\n  var\n    lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n    middle = header[byteIndex + 4] << 3,\n    highTwo = header[byteIndex + 3] & 0x3 << 11;\n\n  return (highTwo | middle) | lowThree;\n};\n\nvar parseType = function(header, byteIndex) {\n  if ((header[byteIndex] === 'I'.charCodeAt(0)) &&\n      (header[byteIndex + 1] === 'D'.charCodeAt(0)) &&\n      (header[byteIndex + 2] === '3'.charCodeAt(0))) {\n    return 'timed-metadata';\n  } else if ((header[byteIndex] & 0xff === 0xff) &&\n             ((header[byteIndex + 1] & 0xf0) === 0xf0)) {\n    return 'audio';\n  }\n  return null;\n};\n\nvar parseSampleRate = function(packet) {\n  var i = 0;\n\n  while (i + 5 < packet.length) {\n    if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n      // If a valid header was not found,  jump one forward and attempt to\n      // find a valid ADTS header starting at the next byte\n      i++;\n      continue;\n    }\n    return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n  }\n\n  return null;\n};\n\nvar parseAacTimestamp = function(packet) {\n  var frameStart, frameSize, frame, frameHeader;\n\n  // find the start of the first frame and the end of the tag\n  frameStart = 10;\n  if (packet[5] & 0x40) {\n    // advance the frame start past the extended header\n    frameStart += 4; // header size field\n    frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n  }\n\n  // parse one or more ID3 frames\n  // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n  do {\n    // determine the number of bytes in this frame\n    frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n    if (frameSize < 1) {\n      return null;\n    }\n    frameHeader = String.fromCharCode(packet[frameStart],\n                                      packet[frameStart + 1],\n                                      packet[frameStart + 2],\n                                      packet[frameStart + 3]);\n\n    if (frameHeader === 'PRIV') {\n      frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n      for (var i = 0; i < frame.byteLength; i++) {\n        if (frame[i] === 0) {\n          var owner = parseIso88591(frame, 0, i);\n          if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n            var d = frame.subarray(i + 1);\n            var size = ((d[3] & 0x01)  << 30) |\n                       (d[4]  << 22) |\n                       (d[5] << 14) |\n                       (d[6] << 6) |\n                       (d[7] >>> 2);\n            size *= 4;\n            size += d[7] & 0x03;\n\n            return size;\n          }\n          break;\n        }\n      }\n    }\n\n    frameStart += 10; // advance past the frame header\n    frameStart += frameSize; // advance past the frame body\n  } while (frameStart < packet.byteLength);\n  return null;\n};\n\nmodule.exports = {\n  parseId3TagSize: parseId3TagSize,\n  parseAdtsSize: parseAdtsSize,\n  parseType: parseType,\n  parseSampleRate: parseSampleRate,\n  parseAacTimestamp: parseAacTimestamp\n};\n","module.exports = assert;\n\nfunction assert(val, msg) {\n  if (!val)\n    throw new Error(msg || 'Assertion failed');\n}\n\nassert.equal = function assertEqual(l, r, msg) {\n  if (l != r)\n    throw new Error(msg || ('Assertion failed: ' + l + ' != ' + r));\n};\n","var check = function (it) {\n  return it && it.Math == Math && it;\n};\n\n// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028\nmodule.exports =\n  // eslint-disable-next-line es/no-global-this -- safe\n  check(typeof globalThis == 'object' && globalThis) ||\n  check(typeof window == 'object' && window) ||\n  // eslint-disable-next-line no-restricted-globals -- safe\n  check(typeof self == 'object' && self) ||\n  check(typeof global == 'object' && global) ||\n  // eslint-disable-next-line no-new-func -- fallback\n  (function () { return this; })() || Function('return this')();\n","/**\n * mux.js\n *\n * Copyright (c) 2015 Brightcove\n * All rights reserved.\n *\n * Reads in-band caption information from a video elementary\n * stream. Captions must follow the CEA-708 standard for injection\n * into an MPEG-2 transport streams.\n * @see https://en.wikipedia.org/wiki/CEA-708\n * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n */\n\n'use strict';\n\n// -----------------\n// Link To Transport\n// -----------------\n\n// Supplemental enhancement information (SEI) NAL units have a\n// payload type field to indicate how they are to be\n// interpreted. CEAS-708 caption content is always transmitted with\n// payload type 0x04.\nvar USER_DATA_REGISTERED_ITU_T_T35 = 4,\n    RBSP_TRAILING_BITS = 128,\n    Stream = require('../utils/stream');\n\n/**\n  * Parse a supplemental enhancement information (SEI) NAL unit.\n  * Stops parsing once a message of type ITU T T35 has been found.\n  *\n  * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n  * @return {object} the parsed SEI payload\n  * @see Rec. ITU-T H.264, 7.3.2.3.1\n  */\nvar parseSei = function(bytes) {\n  var\n    i = 0,\n    result = {\n      payloadType: -1,\n      payloadSize: 0\n    },\n    payloadType = 0,\n    payloadSize = 0;\n\n  // go through the sei_rbsp parsing each each individual sei_message\n  while (i < bytes.byteLength) {\n    // stop once we have hit the end of the sei_rbsp\n    if (bytes[i] === RBSP_TRAILING_BITS) {\n      break;\n    }\n\n    // Parse payload type\n    while (bytes[i] === 0xFF) {\n      payloadType += 255;\n      i++;\n    }\n    payloadType += bytes[i++];\n\n    // Parse payload size\n    while (bytes[i] === 0xFF) {\n      payloadSize += 255;\n      i++;\n    }\n    payloadSize += bytes[i++];\n\n    // this sei_message is a 608/708 caption so save it and break\n    // there can only ever be one caption message in a frame's sei\n    if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n      result.payloadType = payloadType;\n      result.payloadSize = payloadSize;\n      result.payload = bytes.subarray(i, i + payloadSize);\n      break;\n    }\n\n    // skip the payload and parse the next message\n    i += payloadSize;\n    payloadType = 0;\n    payloadSize = 0;\n  }\n\n  return result;\n};\n\n// see ANSI/SCTE 128-1 (2013), section 8.1\nvar parseUserData = function(sei) {\n  // itu_t_t35_contry_code must be 181 (United States) for\n  // captions\n  if (sei.payload[0] !== 181) {\n    return null;\n  }\n\n  // itu_t_t35_provider_code should be 49 (ATSC) for captions\n  if (((sei.payload[1] << 8) | sei.payload[2]) !== 49) {\n    return null;\n  }\n\n  // the user_identifier should be \"GA94\" to indicate ATSC1 data\n  if (String.fromCharCode(sei.payload[3],\n                          sei.payload[4],\n                          sei.payload[5],\n                          sei.payload[6]) !== 'GA94') {\n    return null;\n  }\n\n  // finally, user_data_type_code should be 0x03 for caption data\n  if (sei.payload[7] !== 0x03) {\n    return null;\n  }\n\n  // return the user_data_type_structure and strip the trailing\n  // marker bits\n  return sei.payload.subarray(8, sei.payload.length - 1);\n};\n\n// see CEA-708-D, section 4.4\nvar parseCaptionPackets = function(pts, userData) {\n  var results = [], i, count, offset, data;\n\n  // if this is just filler, return immediately\n  if (!(userData[0] & 0x40)) {\n    return results;\n  }\n\n  // parse out the cc_data_1 and cc_data_2 fields\n  count = userData[0] & 0x1f;\n  for (i = 0; i < count; i++) {\n    offset = i * 3;\n    data = {\n      type: userData[offset + 2] & 0x03,\n      pts: pts\n    };\n\n    // capture cc data when cc_valid is 1\n    if (userData[offset + 2] & 0x04) {\n      data.ccData = (userData[offset + 3] << 8) | userData[offset + 4];\n      results.push(data);\n    }\n  }\n  return results;\n};\n\nvar CaptionStream = function() {\n\n  CaptionStream.prototype.init.call(this);\n\n  this.captionPackets_ = [];\n\n  this.ccStreams_ = [\n    new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n  ];\n\n  this.reset();\n\n  // forward data and done events from CCs to this CaptionStream\n  this.ccStreams_.forEach(function(cc) {\n    cc.on('data', this.trigger.bind(this, 'data'));\n    cc.on('done', this.trigger.bind(this, 'done'));\n  }, this);\n\n};\n\nCaptionStream.prototype = new Stream();\nCaptionStream.prototype.push = function(event) {\n  var sei, userData;\n\n  // only examine SEI NALs\n  if (event.nalUnitType !== 'sei_rbsp') {\n    return;\n  }\n\n  // parse the sei\n  sei = parseSei(event.escapedRBSP);\n\n  // ignore everything but user_data_registered_itu_t_t35\n  if (sei.payloadType !== USER_DATA_REGISTERED_ITU_T_T35) {\n    return;\n  }\n\n  // parse out the user data payload\n  userData = parseUserData(sei);\n\n  // ignore unrecognized userData\n  if (!userData) {\n    return;\n  }\n\n  // Sometimes, the same segment # will be downloaded twice. To stop the\n  // caption data from being processed twice, we track the latest dts we've\n  // received and ignore everything with a dts before that. However, since\n  // data for a specific dts can be split across 2 packets on either side of\n  // a segment boundary, we need to make sure we *don't* ignore the second\n  // dts packet we receive that has dts === this.latestDts_. And thus, the\n  // ignoreNextEqualDts_ flag was born.\n  if (event.dts < this.latestDts_) {\n    // We've started getting older data, so set the flag.\n    this.ignoreNextEqualDts_ = true;\n    return;\n  } else if ((event.dts === this.latestDts_) && (this.ignoreNextEqualDts_)) {\n    // We've received the last duplicate packet, time to start processing again\n    this.ignoreNextEqualDts_ = false;\n    return;\n  }\n\n  // parse out CC data packets and save them for later\n  this.captionPackets_ = this.captionPackets_.concat(parseCaptionPackets(event.pts, userData));\n  this.latestDts_ = event.dts;\n};\n\nCaptionStream.prototype.flush = function() {\n  // make sure we actually parsed captions before proceeding\n  if (!this.captionPackets_.length) {\n    this.ccStreams_.forEach(function(cc) {\n      cc.flush();\n    }, this);\n    return;\n  }\n\n  // In Chrome, the Array#sort function is not stable so add a\n  // presortIndex that we can use to ensure we get a stable-sort\n  this.captionPackets_.forEach(function(elem, idx) {\n    elem.presortIndex = idx;\n  });\n\n  // sort caption byte-pairs based on their PTS values\n  this.captionPackets_.sort(function(a, b) {\n    if (a.pts === b.pts) {\n      return a.presortIndex - b.presortIndex;\n    }\n    return a.pts - b.pts;\n  });\n\n  this.captionPackets_.forEach(function(packet) {\n    if (packet.type < 2) {\n      // Dispatch packet to the right Cea608Stream\n      this.dispatchCea608Packet(packet);\n    }\n    // this is where an 'else' would go for a dispatching packets\n    // to a theoretical Cea708Stream that handles SERVICEn data\n  }, this);\n\n  this.captionPackets_.length = 0;\n  this.ccStreams_.forEach(function(cc) {\n    cc.flush();\n  }, this);\n  return;\n};\n\nCaptionStream.prototype.reset = function() {\n  this.latestDts_ = null;\n  this.ignoreNextEqualDts_ = false;\n  this.activeCea608Channel_ = [null, null];\n  this.ccStreams_.forEach(function(ccStream) {\n    ccStream.reset();\n  });\n};\n\nCaptionStream.prototype.dispatchCea608Packet = function(packet) {\n  // NOTE: packet.type is the CEA608 field\n  if (this.setsChannel1Active(packet)) {\n    this.activeCea608Channel_[packet.type] = 0;\n  } else if (this.setsChannel2Active(packet)) {\n    this.activeCea608Channel_[packet.type] = 1;\n  }\n  if (this.activeCea608Channel_[packet.type] === null) {\n    // If we haven't received anything to set the active channel, discard the\n    // data; we don't want jumbled captions\n    return;\n  }\n  this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n};\n\nCaptionStream.prototype.setsChannel1Active = function(packet) {\n  return ((packet.ccData & 0x7800) === 0x1000);\n};\nCaptionStream.prototype.setsChannel2Active = function(packet) {\n  return ((packet.ccData & 0x7800) === 0x1800);\n};\n\n// ----------------------\n// Session to Application\n// ----------------------\n\nvar CHARACTER_TRANSLATION = {\n  0x2a: 0xe1,     // á\n  0x5c: 0xe9,     // é\n  0x5e: 0xed,     // í\n  0x5f: 0xf3,     // ó\n  0x60: 0xfa,     // ú\n  0x7b: 0xe7,     // ç\n  0x7c: 0xf7,     // ÷\n  0x7d: 0xd1,     // Ñ\n  0x7e: 0xf1,     // ñ\n  0x7f: 0x2588,   // █\n  0x0130: 0xae,   // ®\n  0x0131: 0xb0,   // °\n  0x0132: 0xbd,   // ½\n  0x0133: 0xbf,   // ¿\n  0x0134: 0x2122, // ™\n  0x0135: 0xa2,   // ¢\n  0x0136: 0xa3,   // £\n  0x0137: 0x266a, // ♪\n  0x0138: 0xe0,   // à\n  0x0139: 0xa0,   //\n  0x013a: 0xe8,   // è\n  0x013b: 0xe2,   // â\n  0x013c: 0xea,   // ê\n  0x013d: 0xee,   // î\n  0x013e: 0xf4,   // ô\n  0x013f: 0xfb,   // û\n  0x0220: 0xc1,   // Á\n  0x0221: 0xc9,   // É\n  0x0222: 0xd3,   // Ó\n  0x0223: 0xda,   // Ú\n  0x0224: 0xdc,   // Ü\n  0x0225: 0xfc,   // ü\n  0x0226: 0x2018, // ‘\n  0x0227: 0xa1,   // ¡\n  0x0228: 0x2a,   // *\n  0x0229: 0x27,   // '\n  0x022a: 0x2014, // —\n  0x022b: 0xa9,   // ©\n  0x022c: 0x2120, // ℠\n  0x022d: 0x2022, // •\n  0x022e: 0x201c, // “\n  0x022f: 0x201d, // ”\n  0x0230: 0xc0,   // À\n  0x0231: 0xc2,   // Â\n  0x0232: 0xc7,   // Ç\n  0x0233: 0xc8,   // È\n  0x0234: 0xca,   // Ê\n  0x0235: 0xcb,   // Ë\n  0x0236: 0xeb,   // ë\n  0x0237: 0xce,   // Î\n  0x0238: 0xcf,   // Ï\n  0x0239: 0xef,   // ï\n  0x023a: 0xd4,   // Ô\n  0x023b: 0xd9,   // Ù\n  0x023c: 0xf9,   // ù\n  0x023d: 0xdb,   // Û\n  0x023e: 0xab,   // «\n  0x023f: 0xbb,   // »\n  0x0320: 0xc3,   // Ã\n  0x0321: 0xe3,   // ã\n  0x0322: 0xcd,   // Í\n  0x0323: 0xcc,   // Ì\n  0x0324: 0xec,   // ì\n  0x0325: 0xd2,   // Ò\n  0x0326: 0xf2,   // ò\n  0x0327: 0xd5,   // Õ\n  0x0328: 0xf5,   // õ\n  0x0329: 0x7b,   // {\n  0x032a: 0x7d,   // }\n  0x032b: 0x5c,   // \\\n  0x032c: 0x5e,   // ^\n  0x032d: 0x5f,   // _\n  0x032e: 0x7c,   // |\n  0x032f: 0x7e,   // ~\n  0x0330: 0xc4,   // Ä\n  0x0331: 0xe4,   // ä\n  0x0332: 0xd6,   // Ö\n  0x0333: 0xf6,   // ö\n  0x0334: 0xdf,   // ß\n  0x0335: 0xa5,   // ¥\n  0x0336: 0xa4,   // ¤\n  0x0337: 0x2502, // │\n  0x0338: 0xc5,   // Å\n  0x0339: 0xe5,   // å\n  0x033a: 0xd8,   // Ø\n  0x033b: 0xf8,   // ø\n  0x033c: 0x250c, // ┌\n  0x033d: 0x2510, // ┐\n  0x033e: 0x2514, // └\n  0x033f: 0x2518  // ┘\n};\n\nvar getCharFromCode = function(code) {\n  if (code === null) {\n    return '';\n  }\n  code = CHARACTER_TRANSLATION[code] || code;\n  return String.fromCharCode(code);\n};\n\n// the index of the last row in a CEA-608 display buffer\nvar BOTTOM_ROW = 14;\n\n// This array is used for mapping PACs -> row #, since there's no way of\n// getting it through bit logic.\nvar ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620,\n            0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420];\n\n// CEA-608 captions are rendered onto a 34x15 matrix of character\n// cells. The \"bottom\" row is the last element in the outer array.\nvar createDisplayBuffer = function() {\n  var result = [], i = BOTTOM_ROW + 1;\n  while (i--) {\n    result.push('');\n  }\n  return result;\n};\n\nvar Cea608Stream = function(field, dataChannel) {\n  Cea608Stream.prototype.init.call(this);\n\n  this.field_ = field || 0;\n  this.dataChannel_ = dataChannel || 0;\n\n  this.name_ = 'CC' + (((this.field_ << 1) | this.dataChannel_) + 1);\n\n  this.setConstants();\n  this.reset();\n\n  this.push = function(packet) {\n    var data, swap, char0, char1, text;\n    // remove the parity bits\n    data = packet.ccData & 0x7f7f;\n\n    // ignore duplicate control codes; the spec demands they're sent twice\n    if (data === this.lastControlCode_) {\n      this.lastControlCode_ = null;\n      return;\n    }\n\n    // Store control codes\n    if ((data & 0xf000) === 0x1000) {\n      this.lastControlCode_ = data;\n    } else if (data !== this.PADDING_) {\n      this.lastControlCode_ = null;\n    }\n\n    char0 = data >>> 8;\n    char1 = data & 0xff;\n\n    if (data === this.PADDING_) {\n      return;\n\n    } else if (data === this.RESUME_CAPTION_LOADING_) {\n      this.mode_ = 'popOn';\n\n    } else if (data === this.END_OF_CAPTION_) {\n      this.clearFormatting(packet.pts);\n      // if a caption was being displayed, it's gone now\n      this.flushDisplayed(packet.pts);\n\n      // flip memory\n      swap = this.displayed_;\n      this.displayed_ = this.nonDisplayed_;\n      this.nonDisplayed_ = swap;\n\n      // start measuring the time to display the caption\n      this.startPts_ = packet.pts;\n\n    } else if (data === this.ROLL_UP_2_ROWS_) {\n      this.topRow_ = BOTTOM_ROW - 1;\n      this.mode_ = 'rollUp';\n    } else if (data === this.ROLL_UP_3_ROWS_) {\n      this.topRow_ = BOTTOM_ROW - 2;\n      this.mode_ = 'rollUp';\n    } else if (data === this.ROLL_UP_4_ROWS_) {\n      this.topRow_ = BOTTOM_ROW - 3;\n      this.mode_ = 'rollUp';\n    } else if (data === this.CARRIAGE_RETURN_) {\n      this.clearFormatting(packet.pts);\n      this.flushDisplayed(packet.pts);\n      this.shiftRowsUp_();\n      this.startPts_ = packet.pts;\n\n    } else if (data === this.BACKSPACE_) {\n      if (this.mode_ === 'popOn') {\n        this.nonDisplayed_[BOTTOM_ROW] = this.nonDisplayed_[BOTTOM_ROW].slice(0, -1);\n      } else {\n        this.displayed_[BOTTOM_ROW] = this.displayed_[BOTTOM_ROW].slice(0, -1);\n      }\n    } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n      this.flushDisplayed(packet.pts);\n      this.displayed_ = createDisplayBuffer();\n    } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n      this.nonDisplayed_ = createDisplayBuffer();\n\n    } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n      this.mode_ = 'paintOn';\n\n    // Append special characters to caption text\n    } else if (this.isSpecialCharacter(char0, char1)) {\n      // Bitmask char0 so that we can apply character transformations\n      // regardless of field and data channel.\n      // Then byte-shift to the left and OR with char1 so we can pass the\n      // entire character code to `getCharFromCode`.\n      char0 = (char0 & 0x03) << 8;\n      text = getCharFromCode(char0 | char1);\n      this[this.mode_](packet.pts, text);\n      this.column_++;\n\n    // Append extended characters to caption text\n    } else if (this.isExtCharacter(char0, char1)) {\n      // Extended characters always follow their \"non-extended\" equivalents.\n      // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n      // decoders are supposed to drop the \"è\", while compliant decoders\n      // backspace the \"e\" and insert \"è\".\n\n      // Delete the previous character\n      if (this.mode_ === 'popOn') {\n        this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n      } else {\n        this.displayed_[BOTTOM_ROW] = this.displayed_[BOTTOM_ROW].slice(0, -1);\n      }\n\n      // Bitmask char0 so that we can apply character transformations\n      // regardless of field and data channel.\n      // Then byte-shift to the left and OR with char1 so we can pass the\n      // entire character code to `getCharFromCode`.\n      char0 = (char0 & 0x03) << 8;\n      text = getCharFromCode(char0 | char1);\n      this[this.mode_](packet.pts, text);\n      this.column_++;\n\n    // Process mid-row codes\n    } else if (this.isMidRowCode(char0, char1)) {\n      // Attributes are not additive, so clear all formatting\n      this.clearFormatting(packet.pts);\n\n      // According to the standard, mid-row codes\n      // should be replaced with spaces, so add one now\n      this[this.mode_](packet.pts, ' ');\n      this.column_++;\n\n      if ((char1 & 0xe) === 0xe) {\n        this.addFormatting(packet.pts, ['i']);\n      }\n\n      if ((char1 & 0x1) === 0x1) {\n        this.addFormatting(packet.pts, ['u']);\n      }\n\n    // Detect offset control codes and adjust cursor\n    } else if (this.isOffsetControlCode(char0, char1)) {\n      // Cursor position is set by indent PAC (see below) in 4-column\n      // increments, with an additional offset code of 1-3 to reach any\n      // of the 32 columns specified by CEA-608. So all we need to do\n      // here is increment the column cursor by the given offset.\n      this.column_ += (char1 & 0x03);\n\n    // Detect PACs (Preamble Address Codes)\n    } else if (this.isPAC(char0, char1)) {\n\n      // There's no logic for PAC -> row mapping, so we have to just\n      // find the row code in an array and use its index :(\n      var row = ROWS.indexOf(data & 0x1f20);\n\n      if (row !== this.row_) {\n        // formatting is only persistent for current row\n        this.clearFormatting(packet.pts);\n        this.row_ = row;\n      }\n      // All PACs can apply underline, so detect and apply\n      // (All odd-numbered second bytes set underline)\n      if ((char1 & 0x1) && (this.formatting_.indexOf('u') === -1)) {\n          this.addFormatting(packet.pts, ['u']);\n      }\n\n      if ((data & 0x10) === 0x10) {\n        // We've got an indent level code. Each successive even number\n        // increments the column cursor by 4, so we can get the desired\n        // column position by bit-shifting to the right (to get n/2)\n        // and multiplying by 4.\n        this.column_ = ((data & 0xe) >> 1) * 4;\n      }\n\n      if (this.isColorPAC(char1)) {\n        // it's a color code, though we only support white, which\n        // can be either normal or italicized. white italics can be\n        // either 0x4e or 0x6e depending on the row, so we just\n        // bitwise-and with 0xe to see if italics should be turned on\n        if ((char1 & 0xe) === 0xe) {\n          this.addFormatting(packet.pts, ['i']);\n        }\n      }\n\n    // We have a normal character in char0, and possibly one in char1\n    } else if (this.isNormalChar(char0)) {\n      if (char1 === 0x00) {\n        char1 = null;\n      }\n      text = getCharFromCode(char0);\n      text += getCharFromCode(char1);\n      this[this.mode_](packet.pts, text);\n      this.column_ += text.length;\n\n    } // finish data processing\n\n  };\n};\nCea608Stream.prototype = new Stream();\n// Trigger a cue point that captures the current state of the\n// display buffer\nCea608Stream.prototype.flushDisplayed = function(pts) {\n  var content = this.displayed_\n    // remove spaces from the start and end of the string\n    .map(function(row) {\n      return row.trim();\n    })\n    // combine all text rows to display in one cue\n    .join('\\n')\n    // and remove blank rows from the start and end, but not the middle\n    .replace(/^\\n+|\\n+$/g, '');\n\n  if (content.length) {\n    this.trigger('data', {\n      startPts: this.startPts_,\n      endPts: pts,\n      text: content,\n      stream: this.name_\n    });\n  }\n};\n\n/**\n * Zero out the data, used for startup and on seek\n */\nCea608Stream.prototype.reset = function() {\n  this.mode_ = 'popOn';\n  // When in roll-up mode, the index of the last row that will\n  // actually display captions. If a caption is shifted to a row\n  // with a lower index than this, it is cleared from the display\n  // buffer\n  this.topRow_ = 0;\n  this.startPts_ = 0;\n  this.displayed_ = createDisplayBuffer();\n  this.nonDisplayed_ = createDisplayBuffer();\n  this.lastControlCode_ = null;\n\n  // Track row and column for proper line-breaking and spacing\n  this.column_ = 0;\n  this.row_ = BOTTOM_ROW;\n\n  // This variable holds currently-applied formatting\n  this.formatting_ = [];\n};\n\n/**\n * Sets up control code and related constants for this instance\n */\nCea608Stream.prototype.setConstants = function() {\n  // The following attributes have these uses:\n  // ext_ :    char0 for mid-row codes, and the base for extended\n  //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n  //           extended codes)\n  // control_: char0 for control codes, except byte-shifted to the\n  //           left so that we can do this.control_ | CONTROL_CODE\n  // offset_:  char0 for tab offset codes\n  //\n  // It's also worth noting that control codes, and _only_ control codes,\n  // differ between field 1 and field2. Field 2 control codes are always\n  // their field 1 value plus 1. That's why there's the \"| field\" on the\n  // control value.\n  if (this.dataChannel_ === 0) {\n    this.BASE_     = 0x10;\n    this.EXT_      = 0x11;\n    this.CONTROL_  = (0x14 | this.field_) << 8;\n    this.OFFSET_   = 0x17;\n  } else if (this.dataChannel_ === 1) {\n    this.BASE_     = 0x18;\n    this.EXT_      = 0x19;\n    this.CONTROL_  = (0x1c | this.field_) << 8;\n    this.OFFSET_   = 0x1f;\n  }\n\n  // Constants for the LSByte command codes recognized by Cea608Stream. This\n  // list is not exhaustive. For a more comprehensive listing and semantics see\n  // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n  // Padding\n  this.PADDING_                    = 0x0000;\n  // Pop-on Mode\n  this.RESUME_CAPTION_LOADING_     = this.CONTROL_ | 0x20;\n  this.END_OF_CAPTION_             = this.CONTROL_ | 0x2f;\n  // Roll-up Mode\n  this.ROLL_UP_2_ROWS_             = this.CONTROL_ | 0x25;\n  this.ROLL_UP_3_ROWS_             = this.CONTROL_ | 0x26;\n  this.ROLL_UP_4_ROWS_             = this.CONTROL_ | 0x27;\n  this.CARRIAGE_RETURN_            = this.CONTROL_ | 0x2d;\n  // paint-on mode (not supported)\n  this.RESUME_DIRECT_CAPTIONING_   = this.CONTROL_ | 0x29;\n  // Erasure\n  this.BACKSPACE_                  = this.CONTROL_ | 0x21;\n  this.ERASE_DISPLAYED_MEMORY_     = this.CONTROL_ | 0x2c;\n  this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n};\n\n/**\n * Detects if the 2-byte packet data is a special character\n *\n * Special characters have a second byte in the range 0x30 to 0x3f,\n * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n * data channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are an special character\n */\nCea608Stream.prototype.isSpecialCharacter = function(char0, char1) {\n  return (char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f);\n};\n\n/**\n * Detects if the 2-byte packet data is an extended character\n *\n * Extended characters have a second byte in the range 0x20 to 0x3f,\n * with the first byte being 0x12 or 0x13 (for data channel 1) or\n * 0x1a or 0x1b (for data channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are an extended character\n */\nCea608Stream.prototype.isExtCharacter = function(char0, char1) {\n  return ((char0 === (this.EXT_ + 1) || char0 === (this.EXT_ + 2)) &&\n    (char1 >= 0x20 && char1 <= 0x3f));\n};\n\n/**\n * Detects if the 2-byte packet is a mid-row code\n *\n * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n * channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are a mid-row code\n */\nCea608Stream.prototype.isMidRowCode = function(char0, char1) {\n  return (char0 === this.EXT_ && (char1 >= 0x20 && char1 <= 0x2f));\n};\n\n/**\n * Detects if the 2-byte packet is an offset control code\n *\n * Offset control codes have a second byte in the range 0x21 to 0x23,\n * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n * data channel 2).\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are an offset control code\n */\nCea608Stream.prototype.isOffsetControlCode = function(char0, char1) {\n  return (char0 === this.OFFSET_ && (char1 >= 0x21 && char1 <= 0x23));\n};\n\n/**\n * Detects if the 2-byte packet is a Preamble Address Code\n *\n * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n * range 0x40 to 0x7f.\n *\n * @param  {Integer} char0 The first byte\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the 2 bytes are a PAC\n */\nCea608Stream.prototype.isPAC = function(char0, char1) {\n  return (char0 >= this.BASE_ && char0 < (this.BASE_ + 8) &&\n    (char1 >= 0x40 && char1 <= 0x7f));\n};\n\n/**\n * Detects if a packet's second byte is in the range of a PAC color code\n *\n * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n * 0x60 to 0x6f.\n *\n * @param  {Integer} char1 The second byte\n * @return {Boolean}       Whether the byte is a color PAC\n */\nCea608Stream.prototype.isColorPAC = function(char1) {\n  return ((char1 >= 0x40 && char1 <= 0x4f) || (char1 >= 0x60 && char1 <= 0x7f));\n};\n\n/**\n * Detects if a single byte is in the range of a normal character\n *\n * Normal text bytes are in the range 0x20 to 0x7f.\n *\n * @param  {Integer} char  The byte\n * @return {Boolean}       Whether the byte is a normal character\n */\nCea608Stream.prototype.isNormalChar = function(char) {\n  return (char >= 0x20 && char <= 0x7f);\n};\n\n// Adds the opening HTML tag for the passed character to the caption text,\n// and keeps track of it for later closing\nCea608Stream.prototype.addFormatting = function(pts, format) {\n  this.formatting_ = this.formatting_.concat(format);\n  var text = format.reduce(function(text, format) {\n    return text + '<' + format + '>';\n  }, '');\n  this[this.mode_](pts, text);\n};\n\n// Adds HTML closing tags for current formatting to caption text and\n// clears remembered formatting\nCea608Stream.prototype.clearFormatting = function(pts) {\n  if (!this.formatting_.length) {\n    return;\n  }\n  var text = this.formatting_.reverse().reduce(function(text, format) {\n    return text + '</' + format + '>';\n  }, '');\n  this.formatting_ = [];\n  this[this.mode_](pts, text);\n};\n\n// Mode Implementations\nCea608Stream.prototype.popOn = function(pts, text) {\n  var baseRow = this.nonDisplayed_[this.row_];\n\n  // buffer characters\n  baseRow += text;\n  this.nonDisplayed_[this.row_] = baseRow;\n};\n\nCea608Stream.prototype.rollUp = function(pts, text) {\n  var baseRow = this.displayed_[BOTTOM_ROW];\n\n  baseRow += text;\n  this.displayed_[BOTTOM_ROW] = baseRow;\n\n};\n\nCea608Stream.prototype.shiftRowsUp_ = function() {\n  var i;\n  // clear out inactive rows\n  for (i = 0; i < this.topRow_; i++) {\n    this.displayed_[i] = '';\n  }\n  // shift displayed rows up\n  for (i = this.topRow_; i < BOTTOM_ROW; i++) {\n    this.displayed_[i] = this.displayed_[i + 1];\n  }\n  // clear out the bottom row\n  this.displayed_[BOTTOM_ROW] = '';\n};\n\n// paintOn mode is not implemented\nCea608Stream.prototype.paintOn = function() {};\n\n// exports\nmodule.exports = {\n  CaptionStream: CaptionStream,\n  Cea608Stream: Cea608Stream\n};\n","var $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar ownKeys = require('../internals/own-keys');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar createProperty = require('../internals/create-property');\n\n// `Object.getOwnPropertyDescriptors` method\n// https://tc39.es/ecma262/#sec-object.getownpropertydescriptors\n$({ target: 'Object', stat: true, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptors: function getOwnPropertyDescriptors(object) {\n    var O = toIndexedObject(object);\n    var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n    var keys = ownKeys(O);\n    var result = {};\n    var index = 0;\n    var key, descriptor;\n    while (keys.length > index) {\n      descriptor = getOwnPropertyDescriptor(O, key = keys[index++]);\n      if (descriptor !== undefined) createProperty(result, key, descriptor);\n    }\n    return result;\n  }\n});\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// A bit simpler than readable streams.\n// Implement an async ._write(chunk, encoding, cb), and it'll handle all\n// the drain event emission and buffering.\n\n'use strict';\n\n/*<replacement>*/\n\nvar pna = require('process-nextick-args');\n/*</replacement>*/\n\nmodule.exports = Writable;\n\n/* <replacement> */\nfunction WriteReq(chunk, encoding, cb) {\n  this.chunk = chunk;\n  this.encoding = encoding;\n  this.callback = cb;\n  this.next = null;\n}\n\n// It seems a linked list but it is not\n// there will be only 2 of these for each stream\nfunction CorkedRequest(state) {\n  var _this = this;\n\n  this.next = null;\n  this.entry = null;\n  this.finish = function () {\n    onCorkedFinish(_this, state);\n  };\n}\n/* </replacement> */\n\n/*<replacement>*/\nvar asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : pna.nextTick;\n/*</replacement>*/\n\n/*<replacement>*/\nvar Duplex;\n/*</replacement>*/\n\nWritable.WritableState = WritableState;\n\n/*<replacement>*/\nvar util = Object.create(require('core-util-is'));\nutil.inherits = require('inherits');\n/*</replacement>*/\n\n/*<replacement>*/\nvar internalUtil = {\n  deprecate: require('util-deprecate')\n};\n/*</replacement>*/\n\n/*<replacement>*/\nvar Stream = require('./internal/streams/stream');\n/*</replacement>*/\n\n/*<replacement>*/\n\nvar Buffer = require('safe-buffer').Buffer;\nvar OurUint8Array = global.Uint8Array || function () {};\nfunction _uint8ArrayToBuffer(chunk) {\n  return Buffer.from(chunk);\n}\nfunction _isUint8Array(obj) {\n  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n\n/*</replacement>*/\n\nvar destroyImpl = require('./internal/streams/destroy');\n\nutil.inherits(Writable, Stream);\n\nfunction nop() {}\n\nfunction WritableState(options, stream) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  options = options || {};\n\n  // Duplex streams are both readable and writable, but share\n  // the same options object.\n  // However, some cases require setting options to different\n  // values for the readable and the writable sides of the duplex stream.\n  // These options can be provided separately as readableXXX and writableXXX.\n  var isDuplex = stream instanceof Duplex;\n\n  // object stream flag to indicate whether or not this stream\n  // contains buffers or objects.\n  this.objectMode = !!options.objectMode;\n\n  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;\n\n  // the point at which write() starts returning false\n  // Note: 0 is a valid value, means that we always return false if\n  // the entire buffer is not flushed immediately on write()\n  var hwm = options.highWaterMark;\n  var writableHwm = options.writableHighWaterMark;\n  var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n\n  if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (writableHwm || writableHwm === 0)) this.highWaterMark = writableHwm;else this.highWaterMark = defaultHwm;\n\n  // cast to ints.\n  this.highWaterMark = Math.floor(this.highWaterMark);\n\n  // if _final has been called\n  this.finalCalled = false;\n\n  // drain event flag.\n  this.needDrain = false;\n  // at the start of calling end()\n  this.ending = false;\n  // when end() has been called, and returned\n  this.ended = false;\n  // when 'finish' is emitted\n  this.finished = false;\n\n  // has it been destroyed\n  this.destroyed = false;\n\n  // should we decode strings into buffers before passing to _write?\n  // this is here so that some node-core streams can optimize string\n  // handling at a lower level.\n  var noDecode = options.decodeStrings === false;\n  this.decodeStrings = !noDecode;\n\n  // Crypto is kind of old and crusty.  Historically, its default string\n  // encoding is 'binary' so we have to make this configurable.\n  // Everything else in the universe uses 'utf8', though.\n  this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n  // not an actual buffer we keep track of, but a measurement\n  // of how much we're waiting to get pushed to some underlying\n  // socket or file.\n  this.length = 0;\n\n  // a flag to see when we're in the middle of a write.\n  this.writing = false;\n\n  // when true all writes will be buffered until .uncork() call\n  this.corked = 0;\n\n  // a flag to be able to tell if the onwrite cb is called immediately,\n  // or on a later tick.  We set this to true at first, because any\n  // actions that shouldn't happen until \"later\" should generally also\n  // not happen before the first write call.\n  this.sync = true;\n\n  // a flag to know if we're processing previously buffered items, which\n  // may call the _write() callback in the same tick, so that we don't\n  // end up in an overlapped onwrite situation.\n  this.bufferProcessing = false;\n\n  // the callback that's passed to _write(chunk,cb)\n  this.onwrite = function (er) {\n    onwrite(stream, er);\n  };\n\n  // the callback that the user supplies to write(chunk,encoding,cb)\n  this.writecb = null;\n\n  // the amount that is being written when _write is called.\n  this.writelen = 0;\n\n  this.bufferedRequest = null;\n  this.lastBufferedRequest = null;\n\n  // number of pending user-supplied write callbacks\n  // this must be 0 before 'finish' can be emitted\n  this.pendingcb = 0;\n\n  // emit prefinish if the only thing we're waiting for is _write cbs\n  // This is relevant for synchronous Transform streams\n  this.prefinished = false;\n\n  // True if the error was already emitted and should not be thrown again\n  this.errorEmitted = false;\n\n  // count buffered requests\n  this.bufferedRequestCount = 0;\n\n  // allocate the first CorkedRequest, there is always\n  // one allocated and free to use, and we maintain at most two\n  this.corkedRequestsFree = new CorkedRequest(this);\n}\n\nWritableState.prototype.getBuffer = function getBuffer() {\n  var current = this.bufferedRequest;\n  var out = [];\n  while (current) {\n    out.push(current);\n    current = current.next;\n  }\n  return out;\n};\n\n(function () {\n  try {\n    Object.defineProperty(WritableState.prototype, 'buffer', {\n      get: internalUtil.deprecate(function () {\n        return this.getBuffer();\n      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')\n    });\n  } catch (_) {}\n})();\n\n// Test _writableState for inheritance to account for Duplex streams,\n// whose prototype chain only points to Readable.\nvar realHasInstance;\nif (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {\n  realHasInstance = Function.prototype[Symbol.hasInstance];\n  Object.defineProperty(Writable, Symbol.hasInstance, {\n    value: function (object) {\n      if (realHasInstance.call(this, object)) return true;\n      if (this !== Writable) return false;\n\n      return object && object._writableState instanceof WritableState;\n    }\n  });\n} else {\n  realHasInstance = function (object) {\n    return object instanceof this;\n  };\n}\n\nfunction Writable(options) {\n  Duplex = Duplex || require('./_stream_duplex');\n\n  // Writable ctor is applied to Duplexes, too.\n  // `realHasInstance` is necessary because using plain `instanceof`\n  // would return false, as no `_writableState` property is attached.\n\n  // Trying to use the custom `instanceof` for Writable here will also break the\n  // Node.js LazyTransform implementation, which has a non-trivial getter for\n  // `_writableState` that would lead to infinite recursion.\n  if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) {\n    return new Writable(options);\n  }\n\n  this._writableState = new WritableState(options, this);\n\n  // legacy.\n  this.writable = true;\n\n  if (options) {\n    if (typeof options.write === 'function') this._write = options.write;\n\n    if (typeof options.writev === 'function') this._writev = options.writev;\n\n    if (typeof options.destroy === 'function') this._destroy = options.destroy;\n\n    if (typeof options.final === 'function') this._final = options.final;\n  }\n\n  Stream.call(this);\n}\n\n// Otherwise people can pipe Writable streams, which is just wrong.\nWritable.prototype.pipe = function () {\n  this.emit('error', new Error('Cannot pipe, not readable'));\n};\n\nfunction writeAfterEnd(stream, cb) {\n  var er = new Error('write after end');\n  // TODO: defer error events consistently everywhere, not just the cb\n  stream.emit('error', er);\n  pna.nextTick(cb, er);\n}\n\n// Checks that a user-supplied chunk is valid, especially for the particular\n// mode the stream is in. Currently this means that `null` is never accepted\n// and undefined/non-string values are only allowed in object mode.\nfunction validChunk(stream, state, chunk, cb) {\n  var valid = true;\n  var er = false;\n\n  if (chunk === null) {\n    er = new TypeError('May not write null values to stream');\n  } else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {\n    er = new TypeError('Invalid non-string/buffer chunk');\n  }\n  if (er) {\n    stream.emit('error', er);\n    pna.nextTick(cb, er);\n    valid = false;\n  }\n  return valid;\n}\n\nWritable.prototype.write = function (chunk, encoding, cb) {\n  var state = this._writableState;\n  var ret = false;\n  var isBuf = !state.objectMode && _isUint8Array(chunk);\n\n  if (isBuf && !Buffer.isBuffer(chunk)) {\n    chunk = _uint8ArrayToBuffer(chunk);\n  }\n\n  if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;\n\n  if (typeof cb !== 'function') cb = nop;\n\n  if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {\n    state.pendingcb++;\n    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);\n  }\n\n  return ret;\n};\n\nWritable.prototype.cork = function () {\n  var state = this._writableState;\n\n  state.corked++;\n};\n\nWritable.prototype.uncork = function () {\n  var state = this._writableState;\n\n  if (state.corked) {\n    state.corked--;\n\n    if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);\n  }\n};\n\nWritable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {\n  // node::ParseEncoding() requires lower case.\n  if (typeof encoding === 'string') encoding = encoding.toLowerCase();\n  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding);\n  this._writableState.defaultEncoding = encoding;\n  return this;\n};\n\nfunction decodeChunk(state, chunk, encoding) {\n  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {\n    chunk = Buffer.from(chunk, encoding);\n  }\n  return chunk;\n}\n\nObject.defineProperty(Writable.prototype, 'writableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function () {\n    return this._writableState.highWaterMark;\n  }\n});\n\n// if we're already writing something, then just put this\n// in the queue, and wait our turn.  Otherwise, call _write\n// If we return false, then we need a drain event, so set that flag.\nfunction writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {\n  if (!isBuf) {\n    var newChunk = decodeChunk(state, chunk, encoding);\n    if (chunk !== newChunk) {\n      isBuf = true;\n      encoding = 'buffer';\n      chunk = newChunk;\n    }\n  }\n  var len = state.objectMode ? 1 : chunk.length;\n\n  state.length += len;\n\n  var ret = state.length < state.highWaterMark;\n  // we must ensure that previous needDrain will not be reset to false.\n  if (!ret) state.needDrain = true;\n\n  if (state.writing || state.corked) {\n    var last = state.lastBufferedRequest;\n    state.lastBufferedRequest = {\n      chunk: chunk,\n      encoding: encoding,\n      isBuf: isBuf,\n      callback: cb,\n      next: null\n    };\n    if (last) {\n      last.next = state.lastBufferedRequest;\n    } else {\n      state.bufferedRequest = state.lastBufferedRequest;\n    }\n    state.bufferedRequestCount += 1;\n  } else {\n    doWrite(stream, state, false, len, chunk, encoding, cb);\n  }\n\n  return ret;\n}\n\nfunction doWrite(stream, state, writev, len, chunk, encoding, cb) {\n  state.writelen = len;\n  state.writecb = cb;\n  state.writing = true;\n  state.sync = true;\n  if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);\n  state.sync = false;\n}\n\nfunction onwriteError(stream, state, sync, er, cb) {\n  --state.pendingcb;\n\n  if (sync) {\n    // defer the callback if we are being called synchronously\n    // to avoid piling up things on the stack\n    pna.nextTick(cb, er);\n    // this can emit finish, and it will always happen\n    // after error\n    pna.nextTick(finishMaybe, stream, state);\n    stream._writableState.errorEmitted = true;\n    stream.emit('error', er);\n  } else {\n    // the caller expect this to happen before if\n    // it is async\n    cb(er);\n    stream._writableState.errorEmitted = true;\n    stream.emit('error', er);\n    // this can emit finish, but finish must\n    // always follow error\n    finishMaybe(stream, state);\n  }\n}\n\nfunction onwriteStateUpdate(state) {\n  state.writing = false;\n  state.writecb = null;\n  state.length -= state.writelen;\n  state.writelen = 0;\n}\n\nfunction onwrite(stream, er) {\n  var state = stream._writableState;\n  var sync = state.sync;\n  var cb = state.writecb;\n\n  onwriteStateUpdate(state);\n\n  if (er) onwriteError(stream, state, sync, er, cb);else {\n    // Check if we're actually ready to finish, but don't emit yet\n    var finished = needFinish(state);\n\n    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {\n      clearBuffer(stream, state);\n    }\n\n    if (sync) {\n      /*<replacement>*/\n      asyncWrite(afterWrite, stream, state, finished, cb);\n      /*</replacement>*/\n    } else {\n      afterWrite(stream, state, finished, cb);\n    }\n  }\n}\n\nfunction afterWrite(stream, state, finished, cb) {\n  if (!finished) onwriteDrain(stream, state);\n  state.pendingcb--;\n  cb();\n  finishMaybe(stream, state);\n}\n\n// Must force callback to be called on nextTick, so that we don't\n// emit 'drain' before the write() consumer gets the 'false' return\n// value, and has a chance to attach a 'drain' listener.\nfunction onwriteDrain(stream, state) {\n  if (state.length === 0 && state.needDrain) {\n    state.needDrain = false;\n    stream.emit('drain');\n  }\n}\n\n// if there's something in the buffer waiting, then process it\nfunction clearBuffer(stream, state) {\n  state.bufferProcessing = true;\n  var entry = state.bufferedRequest;\n\n  if (stream._writev && entry && entry.next) {\n    // Fast case, write everything using _writev()\n    var l = state.bufferedRequestCount;\n    var buffer = new Array(l);\n    var holder = state.corkedRequestsFree;\n    holder.entry = entry;\n\n    var count = 0;\n    var allBuffers = true;\n    while (entry) {\n      buffer[count] = entry;\n      if (!entry.isBuf) allBuffers = false;\n      entry = entry.next;\n      count += 1;\n    }\n    buffer.allBuffers = allBuffers;\n\n    doWrite(stream, state, true, state.length, buffer, '', holder.finish);\n\n    // doWrite is almost always async, defer these to save a bit of time\n    // as the hot path ends with doWrite\n    state.pendingcb++;\n    state.lastBufferedRequest = null;\n    if (holder.next) {\n      state.corkedRequestsFree = holder.next;\n      holder.next = null;\n    } else {\n      state.corkedRequestsFree = new CorkedRequest(state);\n    }\n    state.bufferedRequestCount = 0;\n  } else {\n    // Slow case, write chunks one-by-one\n    while (entry) {\n      var chunk = entry.chunk;\n      var encoding = entry.encoding;\n      var cb = entry.callback;\n      var len = state.objectMode ? 1 : chunk.length;\n\n      doWrite(stream, state, false, len, chunk, encoding, cb);\n      entry = entry.next;\n      state.bufferedRequestCount--;\n      // if we didn't call the onwrite immediately, then\n      // it means that we need to wait until it does.\n      // also, that means that the chunk and cb are currently\n      // being processed, so move the buffer counter past them.\n      if (state.writing) {\n        break;\n      }\n    }\n\n    if (entry === null) state.lastBufferedRequest = null;\n  }\n\n  state.bufferedRequest = entry;\n  state.bufferProcessing = false;\n}\n\nWritable.prototype._write = function (chunk, encoding, cb) {\n  cb(new Error('_write() is not implemented'));\n};\n\nWritable.prototype._writev = null;\n\nWritable.prototype.end = function (chunk, encoding, cb) {\n  var state = this._writableState;\n\n  if (typeof chunk === 'function') {\n    cb = chunk;\n    chunk = null;\n    encoding = null;\n  } else if (typeof encoding === 'function') {\n    cb = encoding;\n    encoding = null;\n  }\n\n  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);\n\n  // .end() fully uncorks\n  if (state.corked) {\n    state.corked = 1;\n    this.uncork();\n  }\n\n  // ignore unnecessary end() calls.\n  if (!state.ending && !state.finished) endWritable(this, state, cb);\n};\n\nfunction needFinish(state) {\n  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;\n}\nfunction callFinal(stream, state) {\n  stream._final(function (err) {\n    state.pendingcb--;\n    if (err) {\n      stream.emit('error', err);\n    }\n    state.prefinished = true;\n    stream.emit('prefinish');\n    finishMaybe(stream, state);\n  });\n}\nfunction prefinish(stream, state) {\n  if (!state.prefinished && !state.finalCalled) {\n    if (typeof stream._final === 'function') {\n      state.pendingcb++;\n      state.finalCalled = true;\n      pna.nextTick(callFinal, stream, state);\n    } else {\n      state.prefinished = true;\n      stream.emit('prefinish');\n    }\n  }\n}\n\nfunction finishMaybe(stream, state) {\n  var need = needFinish(state);\n  if (need) {\n    prefinish(stream, state);\n    if (state.pendingcb === 0) {\n      state.finished = true;\n      stream.emit('finish');\n    }\n  }\n  return need;\n}\n\nfunction endWritable(stream, state, cb) {\n  state.ending = true;\n  finishMaybe(stream, state);\n  if (cb) {\n    if (state.finished) pna.nextTick(cb);else stream.once('finish', cb);\n  }\n  state.ended = true;\n  stream.writable = false;\n}\n\nfunction onCorkedFinish(corkReq, state, err) {\n  var entry = corkReq.entry;\n  corkReq.entry = null;\n  while (entry) {\n    var cb = entry.callback;\n    state.pendingcb--;\n    cb(err);\n    entry = entry.next;\n  }\n  if (state.corkedRequestsFree) {\n    state.corkedRequestsFree.next = corkReq;\n  } else {\n    state.corkedRequestsFree = corkReq;\n  }\n}\n\nObject.defineProperty(Writable.prototype, 'destroyed', {\n  get: function () {\n    if (this._writableState === undefined) {\n      return false;\n    }\n    return this._writableState.destroyed;\n  },\n  set: function (value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (!this._writableState) {\n      return;\n    }\n\n    // backward compatibility, the user is explicitly\n    // managing destroyed\n    this._writableState.destroyed = value;\n  }\n});\n\nWritable.prototype.destroy = destroyImpl.destroy;\nWritable.prototype._undestroy = destroyImpl.undestroy;\nWritable.prototype._destroy = function (err, cb) {\n  this.end();\n  cb(err);\n};","var global = require('../internals/global');\nvar DOMIterables = require('../internals/dom-iterables');\nvar ArrayIteratorMethods = require('../modules/es.array.iterator');\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\nvar ArrayValues = ArrayIteratorMethods.values;\n\nfor (var COLLECTION_NAME in DOMIterables) {\n  var Collection = global[COLLECTION_NAME];\n  var CollectionPrototype = Collection && Collection.prototype;\n  if (CollectionPrototype) {\n    // some Chrome versions have non-configurable methods on DOMTokenList\n    if (CollectionPrototype[ITERATOR] !== ArrayValues) try {\n      createNonEnumerableProperty(CollectionPrototype, ITERATOR, ArrayValues);\n    } catch (error) {\n      CollectionPrototype[ITERATOR] = ArrayValues;\n    }\n    if (!CollectionPrototype[TO_STRING_TAG]) {\n      createNonEnumerableProperty(CollectionPrototype, TO_STRING_TAG, COLLECTION_NAME);\n    }\n    if (DOMIterables[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {\n      // some Chrome versions have non-configurable methods on DOMTokenList\n      if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {\n        createNonEnumerableProperty(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);\n      } catch (error) {\n        CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];\n      }\n    }\n  }\n}\n","/**\n * @file async-stream.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _stream = require('./stream');\n\nvar _stream2 = _interopRequireDefault(_stream);\n\n/**\n * A wrapper around the Stream class to use setTiemout\n * and run stream \"jobs\" Asynchronously\n *\n * @class AsyncStream\n * @extends Stream\n */\n\nvar AsyncStream = (function (_Stream) {\n  _inherits(AsyncStream, _Stream);\n\n  function AsyncStream() {\n    _classCallCheck(this, AsyncStream);\n\n    _get(Object.getPrototypeOf(AsyncStream.prototype), 'constructor', this).call(this, _stream2['default']);\n    this.jobs = [];\n    this.delay = 1;\n    this.timeout_ = null;\n  }\n\n  /**\n   * process an async job\n   *\n   * @private\n   */\n\n  _createClass(AsyncStream, [{\n    key: 'processJob_',\n    value: function processJob_() {\n      this.jobs.shift()();\n      if (this.jobs.length) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      } else {\n        this.timeout_ = null;\n      }\n    }\n\n    /**\n     * push a job into the stream\n     *\n     * @param {Function} job the job to push into the stream\n     */\n  }, {\n    key: 'push',\n    value: function push(job) {\n      this.jobs.push(job);\n      if (!this.timeout_) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      }\n    }\n  }]);\n\n  return AsyncStream;\n})(_stream2['default']);\n\nexports['default'] = AsyncStream;\nmodule.exports = exports['default'];","import window from 'global/window'; // const log2 = Math.log2 ? Math.log2 : (x) => (Math.log(x) / Math.log(2));\n\nvar repeat = function repeat(str, len) {\n  var acc = '';\n\n  while (len--) {\n    acc += str;\n  }\n\n  return acc;\n}; // count the number of bits it would take to represent a number\n// we used to do this with log2 but BigInt does not support builtin math\n// Math.ceil(log2(x));\n\n\nexport var countBits = function countBits(x) {\n  return x.toString(2).length;\n}; // count the number of whole bytes it would take to represent a number\n\nexport var countBytes = function countBytes(x) {\n  return Math.ceil(countBits(x) / 8);\n};\nexport var padStart = function padStart(b, len, str) {\n  if (str === void 0) {\n    str = ' ';\n  }\n\n  return (repeat(str, len) + b.toString()).slice(-len);\n};\nexport var isArrayBufferView = function isArrayBufferView(obj) {\n  if (ArrayBuffer.isView === 'function') {\n    return ArrayBuffer.isView(obj);\n  }\n\n  return obj && obj.buffer instanceof ArrayBuffer;\n};\nexport var isTypedArray = function isTypedArray(obj) {\n  return isArrayBufferView(obj);\n};\nexport var toUint8 = function toUint8(bytes) {\n  if (bytes instanceof Uint8Array) {\n    return bytes;\n  }\n\n  if (!Array.isArray(bytes) && !isTypedArray(bytes) && !(bytes instanceof ArrayBuffer)) {\n    // any non-number or NaN leads to empty uint8array\n    // eslint-disable-next-line\n    if (typeof bytes !== 'number' || typeof bytes === 'number' && bytes !== bytes) {\n      bytes = 0;\n    } else {\n      bytes = [bytes];\n    }\n  }\n\n  return new Uint8Array(bytes && bytes.buffer || bytes, bytes && bytes.byteOffset || 0, bytes && bytes.byteLength || 0);\n};\nexport var toHexString = function toHexString(bytes) {\n  bytes = toUint8(bytes);\n  var str = '';\n\n  for (var i = 0; i < bytes.length; i++) {\n    str += padStart(bytes[i].toString(16), 2, '0');\n  }\n\n  return str;\n};\nexport var toBinaryString = function toBinaryString(bytes) {\n  bytes = toUint8(bytes);\n  var str = '';\n\n  for (var i = 0; i < bytes.length; i++) {\n    str += padStart(bytes[i].toString(2), 8, '0');\n  }\n\n  return str;\n};\nvar BigInt = window.BigInt || Number;\nvar BYTE_TABLE = [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\nexport var ENDIANNESS = function () {\n  var a = new Uint16Array([0xFFCC]);\n  var b = new Uint8Array(a.buffer, a.byteOffset, a.byteLength);\n\n  if (b[0] === 0xFF) {\n    return 'big';\n  }\n\n  if (b[0] === 0xCC) {\n    return 'little';\n  }\n\n  return 'unknown';\n}();\nexport var IS_BIG_ENDIAN = ENDIANNESS === 'big';\nexport var IS_LITTLE_ENDIAN = ENDIANNESS === 'little';\nexport var bytesToNumber = function bytesToNumber(bytes, _temp) {\n  var _ref = _temp === void 0 ? {} : _temp,\n      _ref$signed = _ref.signed,\n      signed = _ref$signed === void 0 ? false : _ref$signed,\n      _ref$le = _ref.le,\n      le = _ref$le === void 0 ? false : _ref$le;\n\n  bytes = toUint8(bytes);\n  var fn = le ? 'reduce' : 'reduceRight';\n  var obj = bytes[fn] ? bytes[fn] : Array.prototype[fn];\n  var number = obj.call(bytes, function (total, byte, i) {\n    var exponent = le ? i : Math.abs(i + 1 - bytes.length);\n    return total + BigInt(byte) * BYTE_TABLE[exponent];\n  }, BigInt(0));\n\n  if (signed) {\n    var max = BYTE_TABLE[bytes.length] / BigInt(2) - BigInt(1);\n    number = BigInt(number);\n\n    if (number > max) {\n      number -= max;\n      number -= max;\n      number -= BigInt(2);\n    }\n  }\n\n  return Number(number);\n};\nexport var numberToBytes = function numberToBytes(number, _temp2) {\n  var _ref2 = _temp2 === void 0 ? {} : _temp2,\n      _ref2$le = _ref2.le,\n      le = _ref2$le === void 0 ? false : _ref2$le;\n\n  // eslint-disable-next-line\n  if (typeof number !== 'bigint' && typeof number !== 'number' || typeof number === 'number' && number !== number) {\n    number = 0;\n  }\n\n  number = BigInt(number);\n  var byteCount = countBytes(number);\n  var bytes = new Uint8Array(new ArrayBuffer(byteCount));\n\n  for (var i = 0; i < byteCount; i++) {\n    var byteIndex = le ? i : Math.abs(i + 1 - bytes.length);\n    bytes[byteIndex] = Number(number / BYTE_TABLE[i] & BigInt(0xFF));\n\n    if (number < 0) {\n      bytes[byteIndex] = Math.abs(~bytes[byteIndex]);\n      bytes[byteIndex] -= i === 0 ? 1 : 2;\n    }\n  }\n\n  return bytes;\n};\nexport var bytesToString = function bytesToString(bytes) {\n  if (!bytes) {\n    return '';\n  } // TODO: should toUint8 handle cases where we only have 8 bytes\n  // but report more since this is a Uint16+ Array?\n\n\n  bytes = Array.prototype.slice.call(bytes);\n  var string = String.fromCharCode.apply(null, toUint8(bytes));\n\n  try {\n    return decodeURIComponent(escape(string));\n  } catch (e) {// if decodeURIComponent/escape fails, we are dealing with partial\n    // or full non string data. Just return the potentially garbled string.\n  }\n\n  return string;\n};\nexport var stringToBytes = function stringToBytes(string, stringIsBytes) {\n  if (typeof string !== 'string' && string && typeof string.toString === 'function') {\n    string = string.toString();\n  }\n\n  if (typeof string !== 'string') {\n    return new Uint8Array();\n  } // If the string already is bytes, we don't have to do this\n  // otherwise we do this so that we split multi length characters\n  // into individual bytes\n\n\n  if (!stringIsBytes) {\n    string = unescape(encodeURIComponent(string));\n  }\n\n  var view = new Uint8Array(string.length);\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view;\n};\nexport var concatTypedArrays = function concatTypedArrays() {\n  for (var _len = arguments.length, buffers = new Array(_len), _key = 0; _key < _len; _key++) {\n    buffers[_key] = arguments[_key];\n  }\n\n  buffers = buffers.filter(function (b) {\n    return b && (b.byteLength || b.length) && typeof b !== 'string';\n  });\n\n  if (buffers.length <= 1) {\n    // for 0 length we will return empty uint8\n    // for 1 length we return the first uint8\n    return toUint8(buffers[0]);\n  }\n\n  var totalLen = buffers.reduce(function (total, buf, i) {\n    return total + (buf.byteLength || buf.length);\n  }, 0);\n  var tempBuffer = new Uint8Array(totalLen);\n  var offset = 0;\n  buffers.forEach(function (buf) {\n    buf = toUint8(buf);\n    tempBuffer.set(buf, offset);\n    offset += buf.byteLength;\n  });\n  return tempBuffer;\n};\n/**\n * Check if the bytes \"b\" are contained within bytes \"a\".\n *\n * @param {Uint8Array|Array} a\n *        Bytes to check in\n *\n * @param {Uint8Array|Array} b\n *        Bytes to check for\n *\n * @param {Object} options\n *        options\n *\n * @param {Array|Uint8Array} [offset=0]\n *        offset to use when looking at bytes in a\n *\n * @param {Array|Uint8Array} [mask=[]]\n *        mask to use on bytes before comparison.\n *\n * @return {boolean}\n *         If all bytes in b are inside of a, taking into account\n *         bit masks.\n */\n\nexport var bytesMatch = function bytesMatch(a, b, _temp3) {\n  var _ref3 = _temp3 === void 0 ? {} : _temp3,\n      _ref3$offset = _ref3.offset,\n      offset = _ref3$offset === void 0 ? 0 : _ref3$offset,\n      _ref3$mask = _ref3.mask,\n      mask = _ref3$mask === void 0 ? [] : _ref3$mask;\n\n  a = toUint8(a);\n  b = toUint8(b); // ie 11 does not support uint8 every\n\n  var fn = b.every ? b.every : Array.prototype.every;\n  return b.length && a.length - offset >= b.length && // ie 11 doesn't support every on uin8\n  fn.call(b, function (bByte, i) {\n    var aByte = mask[i] ? mask[i] & a[offset + i] : a[offset + i];\n    return bByte === aByte;\n  });\n};\nexport var sliceBytes = function sliceBytes(src, start, end) {\n  if (Uint8Array.prototype.slice) {\n    return Uint8Array.prototype.slice.call(src, start, end);\n  }\n\n  return new Uint8Array(Array.prototype.slice.call(src, start, end));\n};\nexport var reverseBytes = function reverseBytes(src) {\n  if (src.reverse) {\n    return src.reverse();\n  }\n\n  return Array.prototype.reverse.call(src);\n};",";(function (root, factory) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function () {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var Hasher = C_lib.Hasher;\n\t    var C_algo = C.algo;\n\n\t    // Reusable object\n\t    var W = [];\n\n\t    /**\n\t     * SHA-1 hash algorithm.\n\t     */\n\t    var SHA1 = C_algo.SHA1 = Hasher.extend({\n\t        _doReset: function () {\n\t            this._hash = new WordArray.init([\n\t                0x67452301, 0xefcdab89,\n\t                0x98badcfe, 0x10325476,\n\t                0xc3d2e1f0\n\t            ]);\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Shortcut\n\t            var H = this._hash.words;\n\n\t            // Working variables\n\t            var a = H[0];\n\t            var b = H[1];\n\t            var c = H[2];\n\t            var d = H[3];\n\t            var e = H[4];\n\n\t            // Computation\n\t            for (var i = 0; i < 80; i++) {\n\t                if (i < 16) {\n\t                    W[i] = M[offset + i] | 0;\n\t                } else {\n\t                    var n = W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16];\n\t                    W[i] = (n << 1) | (n >>> 31);\n\t                }\n\n\t                var t = ((a << 5) | (a >>> 27)) + e + W[i];\n\t                if (i < 20) {\n\t                    t += ((b & c) | (~b & d)) + 0x5a827999;\n\t                } else if (i < 40) {\n\t                    t += (b ^ c ^ d) + 0x6ed9eba1;\n\t                } else if (i < 60) {\n\t                    t += ((b & c) | (b & d) | (c & d)) - 0x70e44324;\n\t                } else /* if (i < 80) */ {\n\t                    t += (b ^ c ^ d) - 0x359d3e2a;\n\t                }\n\n\t                e = d;\n\t                d = c;\n\t                c = (b << 30) | (b >>> 2);\n\t                b = a;\n\t                a = t;\n\t            }\n\n\t            // Intermediate hash value\n\t            H[0] = (H[0] + a) | 0;\n\t            H[1] = (H[1] + b) | 0;\n\t            H[2] = (H[2] + c) | 0;\n\t            H[3] = (H[3] + d) | 0;\n\t            H[4] = (H[4] + e) | 0;\n\t        },\n\n\t        _doFinalize: function () {\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\n\t            var nBitsTotal = this._nDataBytes * 8;\n\t            var nBitsLeft = data.sigBytes * 8;\n\n\t            // Add padding\n\t            dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = Math.floor(nBitsTotal / 0x100000000);\n\t            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 15] = nBitsTotal;\n\t            data.sigBytes = dataWords.length * 4;\n\n\t            // Hash final blocks\n\t            this._process();\n\n\t            // Return final computed hash\n\t            return this._hash;\n\t        },\n\n\t        clone: function () {\n\t            var clone = Hasher.clone.call(this);\n\t            clone._hash = this._hash.clone();\n\n\t            return clone;\n\t        }\n\t    });\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.SHA1('message');\n\t     *     var hash = CryptoJS.SHA1(wordArray);\n\t     */\n\t    C.SHA1 = Hasher._createHelper(SHA1);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacSHA1(message, key);\n\t     */\n\t    C.HmacSHA1 = Hasher._createHmacHelper(SHA1);\n\t}());\n\n\n\treturn CryptoJS.SHA1;\n\n}));","// Source: http://jsfiddle.net/vWx8V/\n// http://stackoverflow.com/questions/5603195/full-list-of-javascript-keycodes\n\n/**\n * Conenience method returns corresponding value for given keyName or keyCode.\n *\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Mixed}\n * @api public\n */\n\nfunction keyCode(searchInput) {\n  // Keyboard Events\n  if (searchInput && 'object' === typeof searchInput) {\n    var hasKeyCode = searchInput.which || searchInput.keyCode || searchInput.charCode\n    if (hasKeyCode) searchInput = hasKeyCode\n  }\n\n  // Numbers\n  if ('number' === typeof searchInput) return names[searchInput]\n\n  // Everything else (cast to string)\n  var search = String(searchInput)\n\n  // check codes\n  var foundNamedKey = codes[search.toLowerCase()]\n  if (foundNamedKey) return foundNamedKey\n\n  // check aliases\n  var foundNamedKey = aliases[search.toLowerCase()]\n  if (foundNamedKey) return foundNamedKey\n\n  // weird character?\n  if (search.length === 1) return search.charCodeAt(0)\n\n  return undefined\n}\n\n/**\n * Compares a keyboard event with a given keyCode or keyName.\n *\n * @param {Event} event Keyboard event that should be tested\n * @param {Mixed} keyCode {Number} or keyName {String}\n * @return {Boolean}\n * @api public\n */\nkeyCode.isEventKey = function isEventKey(event, nameOrCode) {\n  if (event && 'object' === typeof event) {\n    var keyCode = event.which || event.keyCode || event.charCode\n    if (keyCode === null || keyCode === undefined) { return false; }\n    if (typeof nameOrCode === 'string') {\n      // check codes\n      var foundNamedKey = codes[nameOrCode.toLowerCase()]\n      if (foundNamedKey) { return foundNamedKey === keyCode; }\n    \n      // check aliases\n      var foundNamedKey = aliases[nameOrCode.toLowerCase()]\n      if (foundNamedKey) { return foundNamedKey === keyCode; }\n    } else if (typeof nameOrCode === 'number') {\n      return nameOrCode === keyCode;\n    }\n    return false;\n  }\n}\n\nexports = module.exports = keyCode;\n\n/**\n * Get by name\n *\n *   exports.code['enter'] // => 13\n */\n\nvar codes = exports.code = exports.codes = {\n  'backspace': 8,\n  'tab': 9,\n  'enter': 13,\n  'shift': 16,\n  'ctrl': 17,\n  'alt': 18,\n  'pause/break': 19,\n  'caps lock': 20,\n  'esc': 27,\n  'space': 32,\n  'page up': 33,\n  'page down': 34,\n  'end': 35,\n  'home': 36,\n  'left': 37,\n  'up': 38,\n  'right': 39,\n  'down': 40,\n  'insert': 45,\n  'delete': 46,\n  'command': 91,\n  'left command': 91,\n  'right command': 93,\n  'numpad *': 106,\n  'numpad +': 107,\n  'numpad -': 109,\n  'numpad .': 110,\n  'numpad /': 111,\n  'num lock': 144,\n  'scroll lock': 145,\n  'my computer': 182,\n  'my calculator': 183,\n  ';': 186,\n  '=': 187,\n  ',': 188,\n  '-': 189,\n  '.': 190,\n  '/': 191,\n  '`': 192,\n  '[': 219,\n  '\\\\': 220,\n  ']': 221,\n  \"'\": 222\n}\n\n// Helper aliases\n\nvar aliases = exports.aliases = {\n  'windows': 91,\n  '⇧': 16,\n  '⌥': 18,\n  '⌃': 17,\n  '⌘': 91,\n  'ctl': 17,\n  'control': 17,\n  'option': 18,\n  'pause': 19,\n  'break': 19,\n  'caps': 20,\n  'return': 13,\n  'escape': 27,\n  'spc': 32,\n  'spacebar': 32,\n  'pgup': 33,\n  'pgdn': 34,\n  'ins': 45,\n  'del': 46,\n  'cmd': 91\n}\n\n/*!\n * Programatically add the following\n */\n\n// lower case chars\nfor (i = 97; i < 123; i++) codes[String.fromCharCode(i)] = i - 32\n\n// numbers\nfor (var i = 48; i < 58; i++) codes[i - 48] = i\n\n// function keys\nfor (i = 1; i < 13; i++) codes['f'+i] = i + 111\n\n// numpad keys\nfor (i = 0; i < 10; i++) codes['numpad '+i] = i + 96\n\n/**\n * Get by code\n *\n *   exports.name[13] // => 'Enter'\n */\n\nvar names = exports.names = exports.title = {} // title for backward compat\n\n// Create reverse mapping\nfor (i in codes) names[codes[i]] = i\n\n// Add aliases\nfor (var alias in aliases) {\n  codes[alias] = aliases[alias]\n}\n","var internalObjectKeys = require('../internals/object-keys-internal');\nvar enumBugKeys = require('../internals/enum-bug-keys');\n\n// `Object.keys` method\n// https://tc39.es/ecma262/#sec-object.keys\n// eslint-disable-next-line es/no-object-keys -- safe\nmodule.exports = Object.keys || function keys(O) {\n  return internalObjectKeys(O, enumBugKeys);\n};\n","// .dirname, .basename, and .extname methods are extracted from Node.js v8.11.1,\n// backported and transplited with Babel, with backwards-compat fixes\n\n// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n// resolves . and .. elements in a path array with directory names there\n// must be no slashes, empty elements, or device names (c:\\) in the array\n// (so also no leading and trailing slashes - it does not distinguish\n// relative and absolute paths)\nfunction normalizeArray(parts, allowAboveRoot) {\n  // if the path tries to go above the root, `up` ends up > 0\n  var up = 0;\n  for (var i = parts.length - 1; i >= 0; i--) {\n    var last = parts[i];\n    if (last === '.') {\n      parts.splice(i, 1);\n    } else if (last === '..') {\n      parts.splice(i, 1);\n      up++;\n    } else if (up) {\n      parts.splice(i, 1);\n      up--;\n    }\n  }\n\n  // if the path is allowed to go above the root, restore leading ..s\n  if (allowAboveRoot) {\n    for (; up--; up) {\n      parts.unshift('..');\n    }\n  }\n\n  return parts;\n}\n\n// path.resolve([from ...], to)\n// posix version\nexports.resolve = function() {\n  var resolvedPath = '',\n      resolvedAbsolute = false;\n\n  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {\n    var path = (i >= 0) ? arguments[i] : process.cwd();\n\n    // Skip empty and invalid entries\n    if (typeof path !== 'string') {\n      throw new TypeError('Arguments to path.resolve must be strings');\n    } else if (!path) {\n      continue;\n    }\n\n    resolvedPath = path + '/' + resolvedPath;\n    resolvedAbsolute = path.charAt(0) === '/';\n  }\n\n  // At this point the path should be resolved to a full absolute path, but\n  // handle relative paths to be safe (might happen when process.cwd() fails)\n\n  // Normalize the path\n  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {\n    return !!p;\n  }), !resolvedAbsolute).join('/');\n\n  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';\n};\n\n// path.normalize(path)\n// posix version\nexports.normalize = function(path) {\n  var isAbsolute = exports.isAbsolute(path),\n      trailingSlash = substr(path, -1) === '/';\n\n  // Normalize the path\n  path = normalizeArray(filter(path.split('/'), function(p) {\n    return !!p;\n  }), !isAbsolute).join('/');\n\n  if (!path && !isAbsolute) {\n    path = '.';\n  }\n  if (path && trailingSlash) {\n    path += '/';\n  }\n\n  return (isAbsolute ? '/' : '') + path;\n};\n\n// posix version\nexports.isAbsolute = function(path) {\n  return path.charAt(0) === '/';\n};\n\n// posix version\nexports.join = function() {\n  var paths = Array.prototype.slice.call(arguments, 0);\n  return exports.normalize(filter(paths, function(p, index) {\n    if (typeof p !== 'string') {\n      throw new TypeError('Arguments to path.join must be strings');\n    }\n    return p;\n  }).join('/'));\n};\n\n\n// path.relative(from, to)\n// posix version\nexports.relative = function(from, to) {\n  from = exports.resolve(from).substr(1);\n  to = exports.resolve(to).substr(1);\n\n  function trim(arr) {\n    var start = 0;\n    for (; start < arr.length; start++) {\n      if (arr[start] !== '') break;\n    }\n\n    var end = arr.length - 1;\n    for (; end >= 0; end--) {\n      if (arr[end] !== '') break;\n    }\n\n    if (start > end) return [];\n    return arr.slice(start, end - start + 1);\n  }\n\n  var fromParts = trim(from.split('/'));\n  var toParts = trim(to.split('/'));\n\n  var length = Math.min(fromParts.length, toParts.length);\n  var samePartsLength = length;\n  for (var i = 0; i < length; i++) {\n    if (fromParts[i] !== toParts[i]) {\n      samePartsLength = i;\n      break;\n    }\n  }\n\n  var outputParts = [];\n  for (var i = samePartsLength; i < fromParts.length; i++) {\n    outputParts.push('..');\n  }\n\n  outputParts = outputParts.concat(toParts.slice(samePartsLength));\n\n  return outputParts.join('/');\n};\n\nexports.sep = '/';\nexports.delimiter = ':';\n\nexports.dirname = function (path) {\n  if (typeof path !== 'string') path = path + '';\n  if (path.length === 0) return '.';\n  var code = path.charCodeAt(0);\n  var hasRoot = code === 47 /*/*/;\n  var end = -1;\n  var matchedSlash = true;\n  for (var i = path.length - 1; i >= 1; --i) {\n    code = path.charCodeAt(i);\n    if (code === 47 /*/*/) {\n        if (!matchedSlash) {\n          end = i;\n          break;\n        }\n      } else {\n      // We saw the first non-path separator\n      matchedSlash = false;\n    }\n  }\n\n  if (end === -1) return hasRoot ? '/' : '.';\n  if (hasRoot && end === 1) {\n    // return '//';\n    // Backwards-compat fix:\n    return '/';\n  }\n  return path.slice(0, end);\n};\n\nfunction basename(path) {\n  if (typeof path !== 'string') path = path + '';\n\n  var start = 0;\n  var end = -1;\n  var matchedSlash = true;\n  var i;\n\n  for (i = path.length - 1; i >= 0; --i) {\n    if (path.charCodeAt(i) === 47 /*/*/) {\n        // If we reached a path separator that was not part of a set of path\n        // separators at the end of the string, stop now\n        if (!matchedSlash) {\n          start = i + 1;\n          break;\n        }\n      } else if (end === -1) {\n      // We saw the first non-path separator, mark this as the end of our\n      // path component\n      matchedSlash = false;\n      end = i + 1;\n    }\n  }\n\n  if (end === -1) return '';\n  return path.slice(start, end);\n}\n\n// Uses a mixed approach for backwards-compatibility, as ext behavior changed\n// in new Node.js versions, so only basename() above is backported here\nexports.basename = function (path, ext) {\n  var f = basename(path);\n  if (ext && f.substr(-1 * ext.length) === ext) {\n    f = f.substr(0, f.length - ext.length);\n  }\n  return f;\n};\n\nexports.extname = function (path) {\n  if (typeof path !== 'string') path = path + '';\n  var startDot = -1;\n  var startPart = 0;\n  var end = -1;\n  var matchedSlash = true;\n  // Track the state of characters (if any) we see before our first dot and\n  // after any path separator we find\n  var preDotState = 0;\n  for (var i = path.length - 1; i >= 0; --i) {\n    var code = path.charCodeAt(i);\n    if (code === 47 /*/*/) {\n        // If we reached a path separator that was not part of a set of path\n        // separators at the end of the string, stop now\n        if (!matchedSlash) {\n          startPart = i + 1;\n          break;\n        }\n        continue;\n      }\n    if (end === -1) {\n      // We saw the first non-path separator, mark this as the end of our\n      // extension\n      matchedSlash = false;\n      end = i + 1;\n    }\n    if (code === 46 /*.*/) {\n        // If this is our first dot, mark it as the start of our extension\n        if (startDot === -1)\n          startDot = i;\n        else if (preDotState !== 1)\n          preDotState = 1;\n    } else if (startDot !== -1) {\n      // We saw a non-dot and non-path separator before our dot, so we should\n      // have a good chance at having a non-empty extension\n      preDotState = -1;\n    }\n  }\n\n  if (startDot === -1 || end === -1 ||\n      // We saw a non-dot character immediately before the dot\n      preDotState === 0 ||\n      // The (right-most) trimmed path component is exactly '..'\n      preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {\n    return '';\n  }\n  return path.slice(startDot, end);\n};\n\nfunction filter (xs, f) {\n    if (xs.filter) return xs.filter(f);\n    var res = [];\n    for (var i = 0; i < xs.length; i++) {\n        if (f(xs[i], i, xs)) res.push(xs[i]);\n    }\n    return res;\n}\n\n// String.prototype.substr - negative index don't work in IE8\nvar substr = 'ab'.substr(-1) === 'b'\n    ? function (str, start, len) { return str.substr(start, len) }\n    : function (str, start, len) {\n        if (start < 0) start = str.length + start;\n        return str.substr(start, len);\n    }\n;\n","var NAMESPACE = require(\"./conventions\").NAMESPACE;\n\n//[4]   \tNameStartChar\t   ::=   \t\":\" | [A-Z] | \"_\" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]\n//[4a]   \tNameChar\t   ::=   \tNameStartChar | \"-\" | \".\" | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]\n//[5]   \tName\t   ::=   \tNameStartChar (NameChar)*\nvar nameStartChar = /[A-Z_a-z\\xC0-\\xD6\\xD8-\\xF6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD]///\\u10000-\\uEFFFF\nvar nameChar = new RegExp(\"[\\\\-\\\\.0-9\"+nameStartChar.source.slice(1,-1)+\"\\\\u00B7\\\\u0300-\\\\u036F\\\\u203F-\\\\u2040]\");\nvar tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\\:'+nameStartChar.source+nameChar.source+'*)?$');\n//var tagNamePattern = /^[a-zA-Z_][\\w\\-\\.]*(?:\\:[a-zA-Z_][\\w\\-\\.]*)?$/\n//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')\n\n//S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n//S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\nvar S_TAG = 0;//tag name offerring\nvar S_ATTR = 1;//attr name offerring\nvar S_ATTR_SPACE=2;//attr name end and space offer\nvar S_EQ = 3;//=space?\nvar S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)\nvar S_ATTR_END = 5;//attr value end and no space(quot end)\nvar S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)\nvar S_TAG_CLOSE = 7;//closed el<el />\n\n/**\n * Creates an error that will not be caught by XMLReader aka the SAX parser.\n *\n * @param {string} message\n * @param {any?} locator Optional, can provide details about the location in the source\n * @constructor\n */\nfunction ParseError(message, locator) {\n\tthis.message = message\n\tthis.locator = locator\n\tif(Error.captureStackTrace) Error.captureStackTrace(this, ParseError);\n}\nParseError.prototype = new Error();\nParseError.prototype.name = ParseError.name\n\nfunction XMLReader(){\n\n}\n\nXMLReader.prototype = {\n\tparse:function(source,defaultNSMap,entityMap){\n\t\tvar domBuilder = this.domBuilder;\n\t\tdomBuilder.startDocument();\n\t\t_copy(defaultNSMap ,defaultNSMap = {})\n\t\tparse(source,defaultNSMap,entityMap,\n\t\t\t\tdomBuilder,this.errorHandler);\n\t\tdomBuilder.endDocument();\n\t}\n}\nfunction parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){\n\tfunction fixedFromCharCode(code) {\n\t\t// String.prototype.fromCharCode does not supports\n\t\t// > 2 bytes unicode chars directly\n\t\tif (code > 0xffff) {\n\t\t\tcode -= 0x10000;\n\t\t\tvar surrogate1 = 0xd800 + (code >> 10)\n\t\t\t\t, surrogate2 = 0xdc00 + (code & 0x3ff);\n\n\t\t\treturn String.fromCharCode(surrogate1, surrogate2);\n\t\t} else {\n\t\t\treturn String.fromCharCode(code);\n\t\t}\n\t}\n\tfunction entityReplacer(a){\n\t\tvar k = a.slice(1,-1);\n\t\tif (Object.hasOwnProperty.call(entityMap, k)) {\n\t\t\treturn entityMap[k];\n\t\t}else if(k.charAt(0) === '#'){\n\t\t\treturn fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))\n\t\t}else{\n\t\t\terrorHandler.error('entity not found:'+a);\n\t\t\treturn a;\n\t\t}\n\t}\n\tfunction appendText(end){//has some bugs\n\t\tif(end>start){\n\t\t\tvar xt = source.substring(start,end).replace(/&#?\\w+;/g,entityReplacer);\n\t\t\tlocator&&position(start);\n\t\t\tdomBuilder.characters(xt,0,end-start);\n\t\t\tstart = end\n\t\t}\n\t}\n\tfunction position(p,m){\n\t\twhile(p>=lineEnd && (m = linePattern.exec(source))){\n\t\t\tlineStart = m.index;\n\t\t\tlineEnd = lineStart + m[0].length;\n\t\t\tlocator.lineNumber++;\n\t\t\t//console.log('line++:',locator,startPos,endPos)\n\t\t}\n\t\tlocator.columnNumber = p-lineStart+1;\n\t}\n\tvar lineStart = 0;\n\tvar lineEnd = 0;\n\tvar linePattern = /.*(?:\\r\\n?|\\n)|.*$/g\n\tvar locator = domBuilder.locator;\n\n\tvar parseStack = [{currentNSMap:defaultNSMapCopy}]\n\tvar closeMap = {};\n\tvar start = 0;\n\twhile(true){\n\t\ttry{\n\t\t\tvar tagStart = source.indexOf('<',start);\n\t\t\tif(tagStart<0){\n\t\t\t\tif(!source.substr(start).match(/^\\s*$/)){\n\t\t\t\t\tvar doc = domBuilder.doc;\n\t    \t\t\tvar text = doc.createTextNode(source.substr(start));\n\t    \t\t\tdoc.appendChild(text);\n\t    \t\t\tdomBuilder.currentElement = text;\n\t\t\t\t}\n\t\t\t\treturn;\n\t\t\t}\n\t\t\tif(tagStart>start){\n\t\t\t\tappendText(tagStart);\n\t\t\t}\n\t\t\tswitch(source.charAt(tagStart+1)){\n\t\t\tcase '/':\n\t\t\t\tvar end = source.indexOf('>',tagStart+3);\n\t\t\t\tvar tagName = source.substring(tagStart + 2, end).replace(/[ \\t\\n\\r]+$/g, '');\n\t\t\t\tvar config = parseStack.pop();\n\t\t\t\tif(end<0){\n\n\t        \t\ttagName = source.substring(tagStart+2).replace(/[\\s<].*/,'');\n\t        \t\terrorHandler.error(\"end tag name: \"+tagName+' is not complete:'+config.tagName);\n\t        \t\tend = tagStart+1+tagName.length;\n\t        \t}else if(tagName.match(/\\s</)){\n\t        \t\ttagName = tagName.replace(/[\\s<].*/,'');\n\t        \t\terrorHandler.error(\"end tag name: \"+tagName+' maybe not complete');\n\t        \t\tend = tagStart+1+tagName.length;\n\t\t\t\t}\n\t\t\t\tvar localNSMap = config.localNSMap;\n\t\t\t\tvar endMatch = config.tagName == tagName;\n\t\t\t\tvar endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase()\n\t\t        if(endIgnoreCaseMach){\n\t\t        \tdomBuilder.endElement(config.uri,config.localName,tagName);\n\t\t\t\t\tif(localNSMap){\n\t\t\t\t\t\tfor (var prefix in localNSMap) {\n\t\t\t\t\t\t\tif (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {\n\t\t\t\t\t\t\t\tdomBuilder.endPrefixMapping(prefix);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t\tif(!endMatch){\n\t\t            \terrorHandler.fatalError(\"end tag name: \"+tagName+' is not match the current start tagName:'+config.tagName ); // No known test case\n\t\t\t\t\t}\n\t\t        }else{\n\t\t        \tparseStack.push(config)\n\t\t        }\n\n\t\t\t\tend++;\n\t\t\t\tbreak;\n\t\t\t\t// end elment\n\t\t\tcase '?':// <?...?>\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tend = parseInstruction(source,tagStart,domBuilder);\n\t\t\t\tbreak;\n\t\t\tcase '!':// <!doctype,<![CDATA,<!--\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tend = parseDCC(source,tagStart,domBuilder,errorHandler);\n\t\t\t\tbreak;\n\t\t\tdefault:\n\t\t\t\tlocator&&position(tagStart);\n\t\t\t\tvar el = new ElementAttributes();\n\t\t\t\tvar currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n\t\t\t\t//elStartEnd\n\t\t\t\tvar end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);\n\t\t\t\tvar len = el.length;\n\n\n\t\t\t\tif(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){\n\t\t\t\t\tel.closed = true;\n\t\t\t\t\tif(!entityMap.nbsp){\n\t\t\t\t\t\terrorHandler.warning('unclosed xml attribute');\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tif(locator && len){\n\t\t\t\t\tvar locator2 = copyLocator(locator,{});\n\t\t\t\t\t//try{//attribute position fixed\n\t\t\t\t\tfor(var i = 0;i<len;i++){\n\t\t\t\t\t\tvar a = el[i];\n\t\t\t\t\t\tposition(a.offset);\n\t\t\t\t\t\ta.locator = copyLocator(locator,{});\n\t\t\t\t\t}\n\t\t\t\t\tdomBuilder.locator = locator2\n\t\t\t\t\tif(appendElement(el,domBuilder,currentNSMap)){\n\t\t\t\t\t\tparseStack.push(el)\n\t\t\t\t\t}\n\t\t\t\t\tdomBuilder.locator = locator;\n\t\t\t\t}else{\n\t\t\t\t\tif(appendElement(el,domBuilder,currentNSMap)){\n\t\t\t\t\t\tparseStack.push(el)\n\t\t\t\t\t}\n\t\t\t\t}\n\n\t\t\t\tif (NAMESPACE.isHTML(el.uri) && !el.closed) {\n\t\t\t\t\tend = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder)\n\t\t\t\t} else {\n\t\t\t\t\tend++;\n\t\t\t\t}\n\t\t\t}\n\t\t}catch(e){\n\t\t\tif (e instanceof ParseError) {\n\t\t\t\tthrow e;\n\t\t\t}\n\t\t\terrorHandler.error('element parse error: '+e)\n\t\t\tend = -1;\n\t\t}\n\t\tif(end>start){\n\t\t\tstart = end;\n\t\t}else{\n\t\t\t//TODO: 这里有可能sax回退，有位置错误风险\n\t\t\tappendText(Math.max(tagStart,start)+1);\n\t\t}\n\t}\n}\nfunction copyLocator(f,t){\n\tt.lineNumber = f.lineNumber;\n\tt.columnNumber = f.columnNumber;\n\treturn t;\n}\n\n/**\n * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);\n * @return end of the elementStartPart(end of elementEndPart for selfClosed el)\n */\nfunction parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){\n\n\t/**\n\t * @param {string} qname\n\t * @param {string} value\n\t * @param {number} startIndex\n\t */\n\tfunction addAttribute(qname, value, startIndex) {\n\t\tif (el.attributeNames.hasOwnProperty(qname)) {\n\t\t\terrorHandler.fatalError('Attribute ' + qname + ' redefined')\n\t\t}\n\t\tel.addValue(\n\t\t\tqname,\n\t\t\t// @see https://www.w3.org/TR/xml/#AVNormalize\n\t\t\t// since the xmldom sax parser does not \"interpret\" DTD the following is not implemented:\n\t\t\t// - recursive replacement of (DTD) entity references\n\t\t\t// - trimming and collapsing multiple spaces into a single one for attributes that are not of type CDATA\n\t\t\tvalue.replace(/[\\t\\n\\r]/g, ' ').replace(/&#?\\w+;/g, entityReplacer),\n\t\t\tstartIndex\n\t\t)\n\t}\n\tvar attrName;\n\tvar value;\n\tvar p = ++start;\n\tvar s = S_TAG;//status\n\twhile(true){\n\t\tvar c = source.charAt(p);\n\t\tswitch(c){\n\t\tcase '=':\n\t\t\tif(s === S_ATTR){//attrName\n\t\t\t\tattrName = source.slice(start,p);\n\t\t\t\ts = S_EQ;\n\t\t\t}else if(s === S_ATTR_SPACE){\n\t\t\t\ts = S_EQ;\n\t\t\t}else{\n\t\t\t\t//fatalError: equal must after attrName or space after attrName\n\t\t\t\tthrow new Error('attribute equal must after attrName'); // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase '\\'':\n\t\tcase '\"':\n\t\t\tif(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE\n\t\t\t\t){//equal\n\t\t\t\tif(s === S_ATTR){\n\t\t\t\t\terrorHandler.warning('attribute value must after \"=\"')\n\t\t\t\t\tattrName = source.slice(start,p)\n\t\t\t\t}\n\t\t\t\tstart = p+1;\n\t\t\t\tp = source.indexOf(c,start)\n\t\t\t\tif(p>0){\n\t\t\t\t\tvalue = source.slice(start, p);\n\t\t\t\t\taddAttribute(attrName, value, start-1);\n\t\t\t\t\ts = S_ATTR_END;\n\t\t\t\t}else{\n\t\t\t\t\t//fatalError: no end quot match\n\t\t\t\t\tthrow new Error('attribute value no end \\''+c+'\\' match');\n\t\t\t\t}\n\t\t\t}else if(s == S_ATTR_NOQUOT_VALUE){\n\t\t\t\tvalue = source.slice(start, p);\n\t\t\t\taddAttribute(attrName, value, start);\n\t\t\t\terrorHandler.warning('attribute \"'+attrName+'\" missed start quot('+c+')!!');\n\t\t\t\tstart = p+1;\n\t\t\t\ts = S_ATTR_END\n\t\t\t}else{\n\t\t\t\t//fatalError: no equal before\n\t\t\t\tthrow new Error('attribute value must after \"=\"'); // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase '/':\n\t\t\tswitch(s){\n\t\t\tcase S_TAG:\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\tcase S_ATTR_END:\n\t\t\tcase S_TAG_SPACE:\n\t\t\tcase S_TAG_CLOSE:\n\t\t\t\ts =S_TAG_CLOSE;\n\t\t\t\tel.closed = true;\n\t\t\tcase S_ATTR_NOQUOT_VALUE:\n\t\t\tcase S_ATTR:\n\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_SPACE:\n\t\t\t\t\tel.closed = true;\n\t\t\t\tbreak;\n\t\t\t//case S_EQ:\n\t\t\tdefault:\n\t\t\t\tthrow new Error(\"attribute invalid close char('/')\") // No known test case\n\t\t\t}\n\t\t\tbreak;\n\t\tcase ''://end document\n\t\t\terrorHandler.error('unexpected end of input');\n\t\t\tif(s == S_TAG){\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\t}\n\t\t\treturn p;\n\t\tcase '>':\n\t\t\tswitch(s){\n\t\t\tcase S_TAG:\n\t\t\t\tel.setTagName(source.slice(start,p));\n\t\t\tcase S_ATTR_END:\n\t\t\tcase S_TAG_SPACE:\n\t\t\tcase S_TAG_CLOSE:\n\t\t\t\tbreak;//normal\n\t\t\tcase S_ATTR_NOQUOT_VALUE://Compatible state\n\t\t\tcase S_ATTR:\n\t\t\t\tvalue = source.slice(start,p);\n\t\t\t\tif(value.slice(-1) === '/'){\n\t\t\t\t\tel.closed  = true;\n\t\t\t\t\tvalue = value.slice(0,-1)\n\t\t\t\t}\n\t\t\tcase S_ATTR_SPACE:\n\t\t\t\tif(s === S_ATTR_SPACE){\n\t\t\t\t\tvalue = attrName;\n\t\t\t\t}\n\t\t\t\tif(s == S_ATTR_NOQUOT_VALUE){\n\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed quot(\")!');\n\t\t\t\t\taddAttribute(attrName, value, start)\n\t\t\t\t}else{\n\t\t\t\t\tif(!NAMESPACE.isHTML(currentNSMap['']) || !value.match(/^(?:disabled|checked|selected)$/i)){\n\t\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed value!! \"'+value+'\" instead!!')\n\t\t\t\t\t}\n\t\t\t\t\taddAttribute(value, value, start)\n\t\t\t\t}\n\t\t\t\tbreak;\n\t\t\tcase S_EQ:\n\t\t\t\tthrow new Error('attribute value missed!!');\n\t\t\t}\n//\t\t\tconsole.log(tagName,tagNamePattern,tagNamePattern.test(tagName))\n\t\t\treturn p;\n\t\t/*xml space '\\x20' | #x9 | #xD | #xA; */\n\t\tcase '\\u0080':\n\t\t\tc = ' ';\n\t\tdefault:\n\t\t\tif(c<= ' '){//space\n\t\t\t\tswitch(s){\n\t\t\t\tcase S_TAG:\n\t\t\t\t\tel.setTagName(source.slice(start,p));//tagName\n\t\t\t\t\ts = S_TAG_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR:\n\t\t\t\t\tattrName = source.slice(start,p)\n\t\t\t\t\ts = S_ATTR_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_NOQUOT_VALUE:\n\t\t\t\t\tvar value = source.slice(start, p);\n\t\t\t\t\terrorHandler.warning('attribute \"'+value+'\" missed quot(\")!!');\n\t\t\t\t\taddAttribute(attrName, value, start)\n\t\t\t\tcase S_ATTR_END:\n\t\t\t\t\ts = S_TAG_SPACE;\n\t\t\t\t\tbreak;\n\t\t\t\t//case S_TAG_SPACE:\n\t\t\t\t//case S_EQ:\n\t\t\t\t//case S_ATTR_SPACE:\n\t\t\t\t//\tvoid();break;\n\t\t\t\t//case S_TAG_CLOSE:\n\t\t\t\t\t//ignore warning\n\t\t\t\t}\n\t\t\t}else{//not space\n//S_TAG,\tS_ATTR,\tS_EQ,\tS_ATTR_NOQUOT_VALUE\n//S_ATTR_SPACE,\tS_ATTR_END,\tS_TAG_SPACE, S_TAG_CLOSE\n\t\t\t\tswitch(s){\n\t\t\t\t//case S_TAG:void();break;\n\t\t\t\t//case S_ATTR:void();break;\n\t\t\t\t//case S_ATTR_NOQUOT_VALUE:void();break;\n\t\t\t\tcase S_ATTR_SPACE:\n\t\t\t\t\tvar tagName =  el.tagName;\n\t\t\t\t\tif (!NAMESPACE.isHTML(currentNSMap['']) || !attrName.match(/^(?:disabled|checked|selected)$/i)) {\n\t\t\t\t\t\terrorHandler.warning('attribute \"'+attrName+'\" missed value!! \"'+attrName+'\" instead2!!')\n\t\t\t\t\t}\n\t\t\t\t\taddAttribute(attrName, attrName, start);\n\t\t\t\t\tstart = p;\n\t\t\t\t\ts = S_ATTR;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_ATTR_END:\n\t\t\t\t\terrorHandler.warning('attribute space is required\"'+attrName+'\"!!')\n\t\t\t\tcase S_TAG_SPACE:\n\t\t\t\t\ts = S_ATTR;\n\t\t\t\t\tstart = p;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_EQ:\n\t\t\t\t\ts = S_ATTR_NOQUOT_VALUE;\n\t\t\t\t\tstart = p;\n\t\t\t\t\tbreak;\n\t\t\t\tcase S_TAG_CLOSE:\n\t\t\t\t\tthrow new Error(\"elements closed character '/' and '>' must be connected to\");\n\t\t\t\t}\n\t\t\t}\n\t\t}//end outer switch\n\t\t//console.log('p++',p)\n\t\tp++;\n\t}\n}\n/**\n * @return true if has new namespace define\n */\nfunction appendElement(el,domBuilder,currentNSMap){\n\tvar tagName = el.tagName;\n\tvar localNSMap = null;\n\t//var currentNSMap = parseStack[parseStack.length-1].currentNSMap;\n\tvar i = el.length;\n\twhile(i--){\n\t\tvar a = el[i];\n\t\tvar qName = a.qName;\n\t\tvar value = a.value;\n\t\tvar nsp = qName.indexOf(':');\n\t\tif(nsp>0){\n\t\t\tvar prefix = a.prefix = qName.slice(0,nsp);\n\t\t\tvar localName = qName.slice(nsp+1);\n\t\t\tvar nsPrefix = prefix === 'xmlns' && localName\n\t\t}else{\n\t\t\tlocalName = qName;\n\t\t\tprefix = null\n\t\t\tnsPrefix = qName === 'xmlns' && ''\n\t\t}\n\t\t//can not set prefix,because prefix !== ''\n\t\ta.localName = localName ;\n\t\t//prefix == null for no ns prefix attribute\n\t\tif(nsPrefix !== false){//hack!!\n\t\t\tif(localNSMap == null){\n\t\t\t\tlocalNSMap = {}\n\t\t\t\t//console.log(currentNSMap,0)\n\t\t\t\t_copy(currentNSMap,currentNSMap={})\n\t\t\t\t//console.log(currentNSMap,1)\n\t\t\t}\n\t\t\tcurrentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;\n\t\t\ta.uri = NAMESPACE.XMLNS\n\t\t\tdomBuilder.startPrefixMapping(nsPrefix, value)\n\t\t}\n\t}\n\tvar i = el.length;\n\twhile(i--){\n\t\ta = el[i];\n\t\tvar prefix = a.prefix;\n\t\tif(prefix){//no prefix attribute has no namespace\n\t\t\tif(prefix === 'xml'){\n\t\t\t\ta.uri = NAMESPACE.XML;\n\t\t\t}if(prefix !== 'xmlns'){\n\t\t\t\ta.uri = currentNSMap[prefix || '']\n\n\t\t\t\t//{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}\n\t\t\t}\n\t\t}\n\t}\n\tvar nsp = tagName.indexOf(':');\n\tif(nsp>0){\n\t\tprefix = el.prefix = tagName.slice(0,nsp);\n\t\tlocalName = el.localName = tagName.slice(nsp+1);\n\t}else{\n\t\tprefix = null;//important!!\n\t\tlocalName = el.localName = tagName;\n\t}\n\t//no prefix element has default namespace\n\tvar ns = el.uri = currentNSMap[prefix || ''];\n\tdomBuilder.startElement(ns,localName,tagName,el);\n\t//endPrefixMapping and startPrefixMapping have not any help for dom builder\n\t//localNSMap = null\n\tif(el.closed){\n\t\tdomBuilder.endElement(ns,localName,tagName);\n\t\tif(localNSMap){\n\t\t\tfor (prefix in localNSMap) {\n\t\t\t\tif (Object.prototype.hasOwnProperty.call(localNSMap, prefix)) {\n\t\t\t\t\tdomBuilder.endPrefixMapping(prefix);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}else{\n\t\tel.currentNSMap = currentNSMap;\n\t\tel.localNSMap = localNSMap;\n\t\t//parseStack.push(el);\n\t\treturn true;\n\t}\n}\nfunction parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){\n\tif(/^(?:script|textarea)$/i.test(tagName)){\n\t\tvar elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);\n\t\tvar text = source.substring(elStartEnd+1,elEndStart);\n\t\tif(/[&<]/.test(text)){\n\t\t\tif(/^script$/i.test(tagName)){\n\t\t\t\t//if(!/\\]\\]>/.test(text)){\n\t\t\t\t\t//lexHandler.startCDATA();\n\t\t\t\t\tdomBuilder.characters(text,0,text.length);\n\t\t\t\t\t//lexHandler.endCDATA();\n\t\t\t\t\treturn elEndStart;\n\t\t\t\t//}\n\t\t\t}//}else{//text area\n\t\t\t\ttext = text.replace(/&#?\\w+;/g,entityReplacer);\n\t\t\t\tdomBuilder.characters(text,0,text.length);\n\t\t\t\treturn elEndStart;\n\t\t\t//}\n\n\t\t}\n\t}\n\treturn elStartEnd+1;\n}\nfunction fixSelfClosed(source,elStartEnd,tagName,closeMap){\n\t//if(tagName in closeMap){\n\tvar pos = closeMap[tagName];\n\tif(pos == null){\n\t\t//console.log(tagName)\n\t\tpos =  source.lastIndexOf('</'+tagName+'>')\n\t\tif(pos<elStartEnd){//忘记闭合\n\t\t\tpos = source.lastIndexOf('</'+tagName)\n\t\t}\n\t\tcloseMap[tagName] =pos\n\t}\n\treturn pos<elStartEnd;\n\t//}\n}\n\nfunction _copy (source, target) {\n\tfor (var n in source) {\n\t\tif (Object.prototype.hasOwnProperty.call(source, n)) {\n\t\t\ttarget[n] = source[n];\n\t\t}\n\t}\n}\n\nfunction parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'\n\tvar next= source.charAt(start+2)\n\tswitch(next){\n\tcase '-':\n\t\tif(source.charAt(start + 3) === '-'){\n\t\t\tvar end = source.indexOf('-->',start+4);\n\t\t\t//append comment source.substring(4,end)//<!--\n\t\t\tif(end>start){\n\t\t\t\tdomBuilder.comment(source,start+4,end-start-4);\n\t\t\t\treturn end+3;\n\t\t\t}else{\n\t\t\t\terrorHandler.error(\"Unclosed comment\");\n\t\t\t\treturn -1;\n\t\t\t}\n\t\t}else{\n\t\t\t//error\n\t\t\treturn -1;\n\t\t}\n\tdefault:\n\t\tif(source.substr(start+3,6) == 'CDATA['){\n\t\t\tvar end = source.indexOf(']]>',start+9);\n\t\t\tdomBuilder.startCDATA();\n\t\t\tdomBuilder.characters(source,start+9,end-start-9);\n\t\t\tdomBuilder.endCDATA()\n\t\t\treturn end+3;\n\t\t}\n\t\t//<!DOCTYPE\n\t\t//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)\n\t\tvar matchs = split(source,start);\n\t\tvar len = matchs.length;\n\t\tif(len>1 && /!doctype/i.test(matchs[0][0])){\n\t\t\tvar name = matchs[1][0];\n\t\t\tvar pubid = false;\n\t\t\tvar sysid = false;\n\t\t\tif(len>3){\n\t\t\t\tif(/^public$/i.test(matchs[2][0])){\n\t\t\t\t\tpubid = matchs[3][0];\n\t\t\t\t\tsysid = len>4 && matchs[4][0];\n\t\t\t\t}else if(/^system$/i.test(matchs[2][0])){\n\t\t\t\t\tsysid = matchs[3][0];\n\t\t\t\t}\n\t\t\t}\n\t\t\tvar lastMatch = matchs[len-1]\n\t\t\tdomBuilder.startDTD(name, pubid, sysid);\n\t\t\tdomBuilder.endDTD();\n\n\t\t\treturn lastMatch.index+lastMatch[0].length\n\t\t}\n\t}\n\treturn -1;\n}\n\n\n\nfunction parseInstruction(source,start,domBuilder){\n\tvar end = source.indexOf('?>',start);\n\tif(end){\n\t\tvar match = source.substring(start,end).match(/^<\\?(\\S*)\\s*([\\s\\S]*?)\\s*$/);\n\t\tif(match){\n\t\t\tvar len = match[0].length;\n\t\t\tdomBuilder.processingInstruction(match[1], match[2]) ;\n\t\t\treturn end+2;\n\t\t}else{//error\n\t\t\treturn -1;\n\t\t}\n\t}\n\treturn -1;\n}\n\nfunction ElementAttributes(){\n\tthis.attributeNames = {}\n}\nElementAttributes.prototype = {\n\tsetTagName:function(tagName){\n\t\tif(!tagNamePattern.test(tagName)){\n\t\t\tthrow new Error('invalid tagName:'+tagName)\n\t\t}\n\t\tthis.tagName = tagName\n\t},\n\taddValue:function(qName, value, offset) {\n\t\tif(!tagNamePattern.test(qName)){\n\t\t\tthrow new Error('invalid attribute:'+qName)\n\t\t}\n\t\tthis.attributeNames[qName] = this.length;\n\t\tthis[this.length++] = {qName:qName,value:value,offset:offset}\n\t},\n\tlength:0,\n\tgetLocalName:function(i){return this[i].localName},\n\tgetLocator:function(i){return this[i].locator},\n\tgetQName:function(i){return this[i].qName},\n\tgetURI:function(i){return this[i].uri},\n\tgetValue:function(i){return this[i].value}\n//\t,getIndex:function(uri, localName)){\n//\t\tif(localName){\n//\n//\t\t}else{\n//\t\t\tvar qName = uri\n//\t\t}\n//\t},\n//\tgetValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},\n//\tgetType:function(uri,localName){}\n//\tgetType:function(i){},\n}\n\n\n\nfunction split(source,start){\n\tvar match;\n\tvar buf = [];\n\tvar reg = /'[^']+'|\"[^\"]+\"|[^\\s<>\\/=]+=?|(\\/?\\s*>|<)/g;\n\treg.lastIndex = start;\n\treg.exec(source);//skip <\n\twhile(match = reg.exec(source)){\n\t\tbuf.push(match);\n\t\tif(match[1])return buf;\n\t}\n}\n\nexports.XMLReader = XMLReader;\nexports.ParseError = ParseError;\n","// `Symbol.prototype.description` getter\n// https://tc39.es/ecma262/#sec-symbol.prototype.description\n'use strict';\nvar $ = require('../internals/export');\nvar DESCRIPTORS = require('../internals/descriptors');\nvar global = require('../internals/global');\nvar has = require('../internals/has');\nvar isObject = require('../internals/is-object');\nvar defineProperty = require('../internals/object-define-property').f;\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\n\nvar NativeSymbol = global.Symbol;\n\nif (DESCRIPTORS && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||\n  // Safari 12 bug\n  NativeSymbol().description !== undefined\n)) {\n  var EmptyStringDescriptionStore = {};\n  // wrap Symbol constructor for correct work with undefined description\n  var SymbolWrapper = function Symbol() {\n    var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);\n    var result = this instanceof SymbolWrapper\n      ? new NativeSymbol(description)\n      // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'\n      : description === undefined ? NativeSymbol() : NativeSymbol(description);\n    if (description === '') EmptyStringDescriptionStore[result] = true;\n    return result;\n  };\n  copyConstructorProperties(SymbolWrapper, NativeSymbol);\n  var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;\n  symbolPrototype.constructor = SymbolWrapper;\n\n  var symbolToString = symbolPrototype.toString;\n  var native = String(NativeSymbol('test')) == 'Symbol(test)';\n  var regexp = /^Symbol\\((.*)\\)[^)]+$/;\n  defineProperty(symbolPrototype, 'description', {\n    configurable: true,\n    get: function description() {\n      var symbol = isObject(this) ? this.valueOf() : this;\n      var string = symbolToString.call(symbol);\n      if (has(EmptyStringDescriptionStore, symbol)) return '';\n      var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');\n      return desc === '' ? undefined : desc;\n    }\n  });\n\n  $({ global: true, forced: true }, {\n    Symbol: SymbolWrapper\n  });\n}\n","'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar _playlistJs = require('./playlist.js');\n\n/**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The master playlist loader\n * @param {String} playlistUri - uri of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {Boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\nvar enableFunction = function enableFunction(loader, playlistUri, changePlaylistFn) {\n  return function (enable) {\n    var playlist = loader.master.playlists[playlistUri];\n    var incompatible = (0, _playlistJs.isIncompatible)(playlist);\n    var currentlyEnabled = (0, _playlistJs.isEnabled)(playlist);\n\n    if (typeof enable === 'undefined') {\n      return currentlyEnabled;\n    }\n\n    if (enable) {\n      delete playlist.disabled;\n    } else {\n      playlist.disabled = true;\n    }\n\n    if (enable !== currentlyEnabled && !incompatible) {\n      // Ensure the outside world knows about our changes\n      changePlaylistFn();\n      if (enable) {\n        loader.trigger('renditionenabled');\n      } else {\n        loader.trigger('renditiondisabled');\n      }\n    }\n    return enable;\n  };\n};\n\n/**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\nvar Representation = function Representation(hlsHandler, playlist, id) {\n  _classCallCheck(this, Representation);\n\n  // Get a reference to a bound version of fastQualityChange_\n  var fastChangeFunction = hlsHandler.masterPlaylistController_.fastQualityChange_.bind(hlsHandler.masterPlaylistController_);\n\n  // some playlist attributes are optional\n  if (playlist.attributes.RESOLUTION) {\n    var resolution = playlist.attributes.RESOLUTION;\n\n    this.width = resolution.width;\n    this.height = resolution.height;\n  }\n\n  this.bandwidth = playlist.attributes.BANDWIDTH;\n\n  // The id is simply the ordinality of the media playlist\n  // within the master playlist\n  this.id = id;\n\n  // Partially-apply the enableFunction to create a playlist-\n  // specific variant\n  this.enabled = enableFunction(hlsHandler.playlists, playlist.uri, fastChangeFunction);\n}\n\n/**\n * A mixin function that adds the `representations` api to an instance\n * of the HlsHandler class\n * @param {HlsHandler} hlsHandler - An instance of HlsHandler to add the\n * representation API into\n */\n;\n\nvar renditionSelectionMixin = function renditionSelectionMixin(hlsHandler) {\n  var playlists = hlsHandler.playlists;\n\n  // Add a single API-specific function to the HlsHandler instance\n  hlsHandler.representations = function () {\n    return playlists.master.playlists.filter(function (media) {\n      return !(0, _playlistJs.isIncompatible)(media);\n    }).map(function (e, i) {\n      return new Representation(hlsHandler, e, e.uri);\n    });\n  };\n};\n\nexports['default'] = renditionSelectionMixin;\nmodule.exports = exports['default'];","var md5 = require('create-hash/md5')\nvar RIPEMD160 = require('ripemd160')\nvar sha = require('sha.js')\nvar Buffer = require('safe-buffer').Buffer\n\nvar checkParameters = require('./precondition')\nvar defaultEncoding = require('./default-encoding')\nvar toBuffer = require('./to-buffer')\n\nvar ZEROS = Buffer.alloc(128)\nvar sizes = {\n  md5: 16,\n  sha1: 20,\n  sha224: 28,\n  sha256: 32,\n  sha384: 48,\n  sha512: 64,\n  rmd160: 20,\n  ripemd160: 20\n}\n\nfunction Hmac (alg, key, saltLen) {\n  var hash = getDigest(alg)\n  var blocksize = (alg === 'sha512' || alg === 'sha384') ? 128 : 64\n\n  if (key.length > blocksize) {\n    key = hash(key)\n  } else if (key.length < blocksize) {\n    key = Buffer.concat([key, ZEROS], blocksize)\n  }\n\n  var ipad = Buffer.allocUnsafe(blocksize + sizes[alg])\n  var opad = Buffer.allocUnsafe(blocksize + sizes[alg])\n  for (var i = 0; i < blocksize; i++) {\n    ipad[i] = key[i] ^ 0x36\n    opad[i] = key[i] ^ 0x5C\n  }\n\n  var ipad1 = Buffer.allocUnsafe(blocksize + saltLen + 4)\n  ipad.copy(ipad1, 0, 0, blocksize)\n  this.ipad1 = ipad1\n  this.ipad2 = ipad\n  this.opad = opad\n  this.alg = alg\n  this.blocksize = blocksize\n  this.hash = hash\n  this.size = sizes[alg]\n}\n\nHmac.prototype.run = function (data, ipad) {\n  data.copy(ipad, this.blocksize)\n  var h = this.hash(ipad)\n  h.copy(this.opad, this.blocksize)\n  return this.hash(this.opad)\n}\n\nfunction getDigest (alg) {\n  function shaFunc (data) {\n    return sha(alg).update(data).digest()\n  }\n  function rmd160Func (data) {\n    return new RIPEMD160().update(data).digest()\n  }\n\n  if (alg === 'rmd160' || alg === 'ripemd160') return rmd160Func\n  if (alg === 'md5') return md5\n  return shaFunc\n}\n\nfunction pbkdf2 (password, salt, iterations, keylen, digest) {\n  checkParameters(iterations, keylen)\n  password = toBuffer(password, defaultEncoding, 'Password')\n  salt = toBuffer(salt, defaultEncoding, 'Salt')\n\n  digest = digest || 'sha1'\n\n  var hmac = new Hmac(digest, password, salt.length)\n\n  var DK = Buffer.allocUnsafe(keylen)\n  var block1 = Buffer.allocUnsafe(salt.length + 4)\n  salt.copy(block1, 0, 0, salt.length)\n\n  var destPos = 0\n  var hLen = sizes[digest]\n  var l = Math.ceil(keylen / hLen)\n\n  for (var i = 1; i <= l; i++) {\n    block1.writeUInt32BE(i, salt.length)\n\n    var T = hmac.run(block1, hmac.ipad1)\n    var U = T\n\n    for (var j = 1; j < iterations; j++) {\n      U = hmac.run(U, hmac.ipad2)\n      for (var k = 0; k < hLen; k++) T[k] ^= U[k]\n    }\n\n    T.copy(DK, destPos)\n    destPos += hLen\n  }\n\n  return DK\n}\n\nmodule.exports = pbkdf2\n","var has = require('../internals/has');\nvar toObject = require('../internals/to-object');\nvar sharedKey = require('../internals/shared-key');\nvar CORRECT_PROTOTYPE_GETTER = require('../internals/correct-prototype-getter');\n\nvar IE_PROTO = sharedKey('IE_PROTO');\nvar ObjectPrototype = Object.prototype;\n\n// `Object.getPrototypeOf` method\n// https://tc39.es/ecma262/#sec-object.getprototypeof\n// eslint-disable-next-line es/no-object-getprototypeof -- safe\nmodule.exports = CORRECT_PROTOTYPE_GETTER ? Object.getPrototypeOf : function (O) {\n  O = toObject(O);\n  if (has(O, IE_PROTO)) return O[IE_PROTO];\n  if (typeof O.constructor == 'function' && O instanceof O.constructor) {\n    return O.constructor.prototype;\n  } return O instanceof Object ? ObjectPrototype : null;\n};\n","var fails = require('../internals/fails');\n\nmodule.exports = !fails(function () {\n  function F() { /* empty */ }\n  F.prototype.constructor = null;\n  // eslint-disable-next-line es/no-object-getprototypeof -- required for testing\n  return Object.getPrototypeOf(new F()) !== F.prototype;\n});\n","var conventions = require(\"./conventions\");\n\nvar find = conventions.find;\nvar NAMESPACE = conventions.NAMESPACE;\n\n/**\n * A prerequisite for `[].filter`, to drop elements that are empty\n * @param {string} input\n * @returns {boolean}\n */\nfunction notEmptyString (input) {\n\treturn input !== ''\n}\n/**\n * @see https://infra.spec.whatwg.org/#split-on-ascii-whitespace\n * @see https://infra.spec.whatwg.org/#ascii-whitespace\n *\n * @param {string} input\n * @returns {string[]} (can be empty)\n */\nfunction splitOnASCIIWhitespace(input) {\n\t// U+0009 TAB, U+000A LF, U+000C FF, U+000D CR, U+0020 SPACE\n\treturn input ? input.split(/[\\t\\n\\f\\r ]+/).filter(notEmptyString) : []\n}\n\n/**\n * Adds element as a key to current if it is not already present.\n *\n * @param {Record<string, boolean | undefined>} current\n * @param {string} element\n * @returns {Record<string, boolean | undefined>}\n */\nfunction orderedSetReducer (current, element) {\n\tif (!current.hasOwnProperty(element)) {\n\t\tcurrent[element] = true;\n\t}\n\treturn current;\n}\n\n/**\n * @see https://infra.spec.whatwg.org/#ordered-set\n * @param {string} input\n * @returns {string[]}\n */\nfunction toOrderedSet(input) {\n\tif (!input) return [];\n\tvar list = splitOnASCIIWhitespace(input);\n\treturn Object.keys(list.reduce(orderedSetReducer, {}))\n}\n\n/**\n * Uses `list.indexOf` to implement something like `Array.prototype.includes`,\n * which we can not rely on being available.\n *\n * @param {any[]} list\n * @returns {function(any): boolean}\n */\nfunction arrayIncludes (list) {\n\treturn function(element) {\n\t\treturn list && list.indexOf(element) !== -1;\n\t}\n}\n\nfunction copy(src,dest){\n\tfor(var p in src){\n\t\tif (Object.prototype.hasOwnProperty.call(src, p)) {\n\t\t\tdest[p] = src[p];\n\t\t}\n\t}\n}\n\n/**\n^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*((?:.*\\{\\s*?[\\r\\n][\\s\\S]*?^})|\\S.*?(?=[;\\r\\n]));?\n^\\w+\\.prototype\\.([_\\w]+)\\s*=\\s*(\\S.*?(?=[;\\r\\n]));?\n */\nfunction _extends(Class,Super){\n\tvar pt = Class.prototype;\n\tif(!(pt instanceof Super)){\n\t\tfunction t(){};\n\t\tt.prototype = Super.prototype;\n\t\tt = new t();\n\t\tcopy(pt,t);\n\t\tClass.prototype = pt = t;\n\t}\n\tif(pt.constructor != Class){\n\t\tif(typeof Class != 'function'){\n\t\t\tconsole.error(\"unknown Class:\"+Class)\n\t\t}\n\t\tpt.constructor = Class\n\t}\n}\n\n// Node Types\nvar NodeType = {}\nvar ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;\nvar ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;\nvar TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;\nvar CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;\nvar ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;\nvar ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;\nvar PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;\nvar COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;\nvar DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;\nvar DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;\nvar DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;\nvar NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;\n\n// ExceptionCode\nvar ExceptionCode = {}\nvar ExceptionMessage = {};\nvar INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]=\"Index size error\"),1);\nvar DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]=\"DOMString size error\"),2);\nvar HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]=\"Hierarchy request error\"),3);\nvar WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]=\"Wrong document\"),4);\nvar INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]=\"Invalid character\"),5);\nvar NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]=\"No data allowed\"),6);\nvar NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]=\"No modification allowed\"),7);\nvar NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]=\"Not found\"),8);\nvar NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]=\"Not supported\"),9);\nvar INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]=\"Attribute in use\"),10);\n//level2\nvar INVALID_STATE_ERR        \t= ExceptionCode.INVALID_STATE_ERR        \t= ((ExceptionMessage[11]=\"Invalid state\"),11);\nvar SYNTAX_ERR               \t= ExceptionCode.SYNTAX_ERR               \t= ((ExceptionMessage[12]=\"Syntax error\"),12);\nvar INVALID_MODIFICATION_ERR \t= ExceptionCode.INVALID_MODIFICATION_ERR \t= ((ExceptionMessage[13]=\"Invalid modification\"),13);\nvar NAMESPACE_ERR            \t= ExceptionCode.NAMESPACE_ERR           \t= ((ExceptionMessage[14]=\"Invalid namespace\"),14);\nvar INVALID_ACCESS_ERR       \t= ExceptionCode.INVALID_ACCESS_ERR      \t= ((ExceptionMessage[15]=\"Invalid access\"),15);\n\n/**\n * DOM Level 2\n * Object DOMException\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html\n * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html\n */\nfunction DOMException(code, message) {\n\tif(message instanceof Error){\n\t\tvar error = message;\n\t}else{\n\t\terror = this;\n\t\tError.call(this, ExceptionMessage[code]);\n\t\tthis.message = ExceptionMessage[code];\n\t\tif(Error.captureStackTrace) Error.captureStackTrace(this, DOMException);\n\t}\n\terror.code = code;\n\tif(message) this.message = this.message + \": \" + message;\n\treturn error;\n};\nDOMException.prototype = Error.prototype;\ncopy(ExceptionCode,DOMException)\n\n/**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177\n * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.\n * The items in the NodeList are accessible via an integral index, starting from 0.\n */\nfunction NodeList() {\n};\nNodeList.prototype = {\n\t/**\n\t * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.\n\t * @standard level1\n\t */\n\tlength:0,\n\t/**\n\t * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.\n\t * @standard level1\n\t * @param index  unsigned long\n\t *   Index into the collection.\n\t * @return Node\n\t * \tThe node at the indexth position in the NodeList, or null if that is not a valid index.\n\t */\n\titem: function(index) {\n\t\treturn index >= 0 && index < this.length ? this[index] : null;\n\t},\n\ttoString:function(isHTML,nodeFilter){\n\t\tfor(var buf = [], i = 0;i<this.length;i++){\n\t\t\tserializeToString(this[i],buf,isHTML,nodeFilter);\n\t\t}\n\t\treturn buf.join('');\n\t},\n\t/**\n\t * @private\n\t * @param {function (Node):boolean} predicate\n\t * @returns {Node[]}\n\t */\n\tfilter: function (predicate) {\n\t\treturn Array.prototype.filter.call(this, predicate);\n\t},\n\t/**\n\t * @private\n\t * @param {Node} item\n\t * @returns {number}\n\t */\n\tindexOf: function (item) {\n\t\treturn Array.prototype.indexOf.call(this, item);\n\t},\n};\n\nfunction LiveNodeList(node,refresh){\n\tthis._node = node;\n\tthis._refresh = refresh\n\t_updateLiveList(this);\n}\nfunction _updateLiveList(list){\n\tvar inc = list._node._inc || list._node.ownerDocument._inc;\n\tif (list._inc !== inc) {\n\t\tvar ls = list._refresh(list._node);\n\t\t__set__(list,'length',ls.length);\n\t\tif (!list.$$length || ls.length < list.$$length) {\n\t\t\tfor (var i = ls.length; i in list; i++) {\n\t\t\t\tif (Object.prototype.hasOwnProperty.call(list, i)) {\n\t\t\t\t\tdelete list[i];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tcopy(ls,list);\n\t\tlist._inc = inc;\n\t}\n}\nLiveNodeList.prototype.item = function(i){\n\t_updateLiveList(this);\n\treturn this[i] || null;\n}\n\n_extends(LiveNodeList,NodeList);\n\n/**\n * Objects implementing the NamedNodeMap interface are used\n * to represent collections of nodes that can be accessed by name.\n * Note that NamedNodeMap does not inherit from NodeList;\n * NamedNodeMaps are not maintained in any particular order.\n * Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index,\n * but this is simply to allow convenient enumeration of the contents of a NamedNodeMap,\n * and does not imply that the DOM specifies an order to these Nodes.\n * NamedNodeMap objects in the DOM are live.\n * used for attributes or DocumentType entities\n */\nfunction NamedNodeMap() {\n};\n\nfunction _findNodeIndex(list,node){\n\tvar i = list.length;\n\twhile(i--){\n\t\tif(list[i] === node){return i}\n\t}\n}\n\nfunction _addNamedNode(el,list,newAttr,oldAttr){\n\tif(oldAttr){\n\t\tlist[_findNodeIndex(list,oldAttr)] = newAttr;\n\t}else{\n\t\tlist[list.length++] = newAttr;\n\t}\n\tif(el){\n\t\tnewAttr.ownerElement = el;\n\t\tvar doc = el.ownerDocument;\n\t\tif(doc){\n\t\t\toldAttr && _onRemoveAttribute(doc,el,oldAttr);\n\t\t\t_onAddAttribute(doc,el,newAttr);\n\t\t}\n\t}\n}\nfunction _removeNamedNode(el,list,attr){\n\t//console.log('remove attr:'+attr)\n\tvar i = _findNodeIndex(list,attr);\n\tif(i>=0){\n\t\tvar lastIndex = list.length-1\n\t\twhile(i<lastIndex){\n\t\t\tlist[i] = list[++i]\n\t\t}\n\t\tlist.length = lastIndex;\n\t\tif(el){\n\t\t\tvar doc = el.ownerDocument;\n\t\t\tif(doc){\n\t\t\t\t_onRemoveAttribute(doc,el,attr);\n\t\t\t\tattr.ownerElement = null;\n\t\t\t}\n\t\t}\n\t}else{\n\t\tthrow new DOMException(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))\n\t}\n}\nNamedNodeMap.prototype = {\n\tlength:0,\n\titem:NodeList.prototype.item,\n\tgetNamedItem: function(key) {\n//\t\tif(key.indexOf(':')>0 || key == 'xmlns'){\n//\t\t\treturn null;\n//\t\t}\n\t\t//console.log()\n\t\tvar i = this.length;\n\t\twhile(i--){\n\t\t\tvar attr = this[i];\n\t\t\t//console.log(attr.nodeName,key)\n\t\t\tif(attr.nodeName == key){\n\t\t\t\treturn attr;\n\t\t\t}\n\t\t}\n\t},\n\tsetNamedItem: function(attr) {\n\t\tvar el = attr.ownerElement;\n\t\tif(el && el!=this._ownerElement){\n\t\t\tthrow new DOMException(INUSE_ATTRIBUTE_ERR);\n\t\t}\n\t\tvar oldAttr = this.getNamedItem(attr.nodeName);\n\t\t_addNamedNode(this._ownerElement,this,attr,oldAttr);\n\t\treturn oldAttr;\n\t},\n\t/* returns Node */\n\tsetNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR\n\t\tvar el = attr.ownerElement, oldAttr;\n\t\tif(el && el!=this._ownerElement){\n\t\t\tthrow new DOMException(INUSE_ATTRIBUTE_ERR);\n\t\t}\n\t\toldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);\n\t\t_addNamedNode(this._ownerElement,this,attr,oldAttr);\n\t\treturn oldAttr;\n\t},\n\n\t/* returns Node */\n\tremoveNamedItem: function(key) {\n\t\tvar attr = this.getNamedItem(key);\n\t\t_removeNamedNode(this._ownerElement,this,attr);\n\t\treturn attr;\n\n\n\t},// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR\n\n\t//for level2\n\tremoveNamedItemNS:function(namespaceURI,localName){\n\t\tvar attr = this.getNamedItemNS(namespaceURI,localName);\n\t\t_removeNamedNode(this._ownerElement,this,attr);\n\t\treturn attr;\n\t},\n\tgetNamedItemNS: function(namespaceURI, localName) {\n\t\tvar i = this.length;\n\t\twhile(i--){\n\t\t\tvar node = this[i];\n\t\t\tif(node.localName == localName && node.namespaceURI == namespaceURI){\n\t\t\t\treturn node;\n\t\t\t}\n\t\t}\n\t\treturn null;\n\t}\n};\n\n/**\n * The DOMImplementation interface represents an object providing methods\n * which are not dependent on any particular document.\n * Such an object is returned by the `Document.implementation` property.\n *\n * __The individual methods describe the differences compared to the specs.__\n *\n * @constructor\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation MDN\n * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490 DOM Level 1 Core (Initial)\n * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-102161490 DOM Level 2 Core\n * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#ID-102161490 DOM Level 3 Core\n * @see https://dom.spec.whatwg.org/#domimplementation DOM Living Standard\n */\nfunction DOMImplementation() {\n}\n\nDOMImplementation.prototype = {\n\t/**\n\t * The DOMImplementation.hasFeature() method returns a Boolean flag indicating if a given feature is supported.\n\t * The different implementations fairly diverged in what kind of features were reported.\n\t * The latest version of the spec settled to force this method to always return true, where the functionality was accurate and in use.\n\t *\n\t * @deprecated It is deprecated and modern browsers return true in all cases.\n\t *\n\t * @param {string} feature\n\t * @param {string} [version]\n\t * @returns {boolean} always true\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/hasFeature MDN\n\t * @see https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-5CED94D7 DOM Level 1 Core\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature DOM Living Standard\n\t */\n\thasFeature: function(feature, version) {\n\t\t\treturn true;\n\t},\n\t/**\n\t * Creates an XML Document object of the specified type with its document element.\n\t *\n\t * __It behaves slightly different from the description in the living standard__:\n\t * - There is no interface/class `XMLDocument`, it returns a `Document` instance.\n\t * - `contentType`, `encoding`, `mode`, `origin`, `url` fields are currently not declared.\n\t * - this implementation is not validating names or qualified names\n\t *   (when parsing XML strings, the SAX parser takes care of that)\n\t *\n\t * @param {string|null} namespaceURI\n\t * @param {string} qualifiedName\n\t * @param {DocumentType=null} doctype\n\t * @returns {Document}\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocument MDN\n\t * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocument DOM Level 2 Core (initial)\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocument  DOM Level 2 Core\n\t *\n\t * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n\t * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n\t * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n\t */\n\tcreateDocument: function(namespaceURI,  qualifiedName, doctype){\n\t\tvar doc = new Document();\n\t\tdoc.implementation = this;\n\t\tdoc.childNodes = new NodeList();\n\t\tdoc.doctype = doctype || null;\n\t\tif (doctype){\n\t\t\tdoc.appendChild(doctype);\n\t\t}\n\t\tif (qualifiedName){\n\t\t\tvar root = doc.createElementNS(namespaceURI, qualifiedName);\n\t\t\tdoc.appendChild(root);\n\t\t}\n\t\treturn doc;\n\t},\n\t/**\n\t * Returns a doctype, with the given `qualifiedName`, `publicId`, and `systemId`.\n\t *\n\t * __This behavior is slightly different from the in the specs__:\n\t * - this implementation is not validating names or qualified names\n\t *   (when parsing XML strings, the SAX parser takes care of that)\n\t *\n\t * @param {string} qualifiedName\n\t * @param {string} [publicId]\n\t * @param {string} [systemId]\n\t * @returns {DocumentType} which can either be used with `DOMImplementation.createDocument` upon document creation\n\t * \t\t\t\t  or can be put into the document via methods like `Node.insertBefore()` or `Node.replaceChild()`\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createDocumentType MDN\n\t * @see https://www.w3.org/TR/DOM-Level-2-Core/core.html#Level-2-Core-DOM-createDocType DOM Level 2 Core\n\t * @see https://dom.spec.whatwg.org/#dom-domimplementation-createdocumenttype DOM Living Standard\n\t *\n\t * @see https://dom.spec.whatwg.org/#validate-and-extract DOM: Validate and extract\n\t * @see https://www.w3.org/TR/xml/#NT-NameStartChar XML Spec: Names\n\t * @see https://www.w3.org/TR/xml-names/#ns-qualnames XML Namespaces: Qualified names\n\t */\n\tcreateDocumentType: function(qualifiedName, publicId, systemId){\n\t\tvar node = new DocumentType();\n\t\tnode.name = qualifiedName;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.publicId = publicId || '';\n\t\tnode.systemId = systemId || '';\n\n\t\treturn node;\n\t}\n};\n\n\n/**\n * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247\n */\n\nfunction Node() {\n};\n\nNode.prototype = {\n\tfirstChild : null,\n\tlastChild : null,\n\tpreviousSibling : null,\n\tnextSibling : null,\n\tattributes : null,\n\tparentNode : null,\n\tchildNodes : null,\n\townerDocument : null,\n\tnodeValue : null,\n\tnamespaceURI : null,\n\tprefix : null,\n\tlocalName : null,\n\t// Modified in DOM Level 2:\n\tinsertBefore:function(newChild, refChild){//raises\n\t\treturn _insertBefore(this,newChild,refChild);\n\t},\n\treplaceChild:function(newChild, oldChild){//raises\n\t\t_insertBefore(this, newChild,oldChild, assertPreReplacementValidityInDocument);\n\t\tif(oldChild){\n\t\t\tthis.removeChild(oldChild);\n\t\t}\n\t},\n\tremoveChild:function(oldChild){\n\t\treturn _removeChild(this,oldChild);\n\t},\n\tappendChild:function(newChild){\n\t\treturn this.insertBefore(newChild,null);\n\t},\n\thasChildNodes:function(){\n\t\treturn this.firstChild != null;\n\t},\n\tcloneNode:function(deep){\n\t\treturn cloneNode(this.ownerDocument||this,this,deep);\n\t},\n\t// Modified in DOM Level 2:\n\tnormalize:function(){\n\t\tvar child = this.firstChild;\n\t\twhile(child){\n\t\t\tvar next = child.nextSibling;\n\t\t\tif(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){\n\t\t\t\tthis.removeChild(next);\n\t\t\t\tchild.appendData(next.data);\n\t\t\t}else{\n\t\t\t\tchild.normalize();\n\t\t\t\tchild = next;\n\t\t\t}\n\t\t}\n\t},\n  \t// Introduced in DOM Level 2:\n\tisSupported:function(feature, version){\n\t\treturn this.ownerDocument.implementation.hasFeature(feature,version);\n\t},\n    // Introduced in DOM Level 2:\n    hasAttributes:function(){\n    \treturn this.attributes.length>0;\n    },\n\t/**\n\t * Look up the prefix associated to the given namespace URI, starting from this node.\n\t * **The default namespace declarations are ignored by this method.**\n\t * See Namespace Prefix Lookup for details on the algorithm used by this method.\n\t *\n\t * _Note: The implementation seems to be incomplete when compared to the algorithm described in the specs._\n\t *\n\t * @param {string | null} namespaceURI\n\t * @returns {string | null}\n\t * @see https://www.w3.org/TR/DOM-Level-3-Core/core.html#Node3-lookupNamespacePrefix\n\t * @see https://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#lookupNamespacePrefixAlgo\n\t * @see https://dom.spec.whatwg.org/#dom-node-lookupprefix\n\t * @see https://github.com/xmldom/xmldom/issues/322\n\t */\n    lookupPrefix:function(namespaceURI){\n    \tvar el = this;\n    \twhile(el){\n    \t\tvar map = el._nsMap;\n    \t\t//console.dir(map)\n    \t\tif(map){\n    \t\t\tfor(var n in map){\n\t\t\t\t\t\tif (Object.prototype.hasOwnProperty.call(map, n) && map[n] === namespaceURI) {\n\t\t\t\t\t\t\treturn n;\n\t\t\t\t\t\t}\n    \t\t\t}\n    \t\t}\n    \t\tel = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;\n    \t}\n    \treturn null;\n    },\n    // Introduced in DOM Level 3:\n    lookupNamespaceURI:function(prefix){\n    \tvar el = this;\n    \twhile(el){\n    \t\tvar map = el._nsMap;\n    \t\t//console.dir(map)\n    \t\tif(map){\n    \t\t\tif(Object.prototype.hasOwnProperty.call(map, prefix)){\n    \t\t\t\treturn map[prefix] ;\n    \t\t\t}\n    \t\t}\n    \t\tel = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;\n    \t}\n    \treturn null;\n    },\n    // Introduced in DOM Level 3:\n    isDefaultNamespace:function(namespaceURI){\n    \tvar prefix = this.lookupPrefix(namespaceURI);\n    \treturn prefix == null;\n    }\n};\n\n\nfunction _xmlEncoder(c){\n\treturn c == '<' && '&lt;' ||\n         c == '>' && '&gt;' ||\n         c == '&' && '&amp;' ||\n         c == '\"' && '&quot;' ||\n         '&#'+c.charCodeAt()+';'\n}\n\n\ncopy(NodeType,Node);\ncopy(NodeType,Node.prototype);\n\n/**\n * @param callback return true for continue,false for break\n * @return boolean true: break visit;\n */\nfunction _visitNode(node,callback){\n\tif(callback(node)){\n\t\treturn true;\n\t}\n\tif(node = node.firstChild){\n\t\tdo{\n\t\t\tif(_visitNode(node,callback)){return true}\n        }while(node=node.nextSibling)\n    }\n}\n\n\n\nfunction Document(){\n\tthis.ownerDocument = this;\n}\n\nfunction _onAddAttribute(doc,el,newAttr){\n\tdoc && doc._inc++;\n\tvar ns = newAttr.namespaceURI ;\n\tif(ns === NAMESPACE.XMLNS){\n\t\t//update namespace\n\t\tel._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value\n\t}\n}\n\nfunction _onRemoveAttribute(doc,el,newAttr,remove){\n\tdoc && doc._inc++;\n\tvar ns = newAttr.namespaceURI ;\n\tif(ns === NAMESPACE.XMLNS){\n\t\t//update namespace\n\t\tdelete el._nsMap[newAttr.prefix?newAttr.localName:'']\n\t}\n}\n\n/**\n * Updates `el.childNodes`, updating the indexed items and it's `length`.\n * Passing `newChild` means it will be appended.\n * Otherwise it's assumed that an item has been removed,\n * and `el.firstNode` and it's `.nextSibling` are used\n * to walk the current list of child nodes.\n *\n * @param {Document} doc\n * @param {Node} el\n * @param {Node} [newChild]\n * @private\n */\nfunction _onUpdateChild (doc, el, newChild) {\n\tif(doc && doc._inc){\n\t\tdoc._inc++;\n\t\t//update childNodes\n\t\tvar cs = el.childNodes;\n\t\tif (newChild) {\n\t\t\tcs[cs.length++] = newChild;\n\t\t} else {\n\t\t\tvar child = el.firstChild;\n\t\t\tvar i = 0;\n\t\t\twhile (child) {\n\t\t\t\tcs[i++] = child;\n\t\t\t\tchild = child.nextSibling;\n\t\t\t}\n\t\t\tcs.length = i;\n\t\t\tdelete cs[cs.length];\n\t\t}\n\t}\n}\n\n/**\n * Removes the connections between `parentNode` and `child`\n * and any existing `child.previousSibling` or `child.nextSibling`.\n *\n * @see https://github.com/xmldom/xmldom/issues/135\n * @see https://github.com/xmldom/xmldom/issues/145\n *\n * @param {Node} parentNode\n * @param {Node} child\n * @returns {Node} the child that was removed.\n * @private\n */\nfunction _removeChild (parentNode, child) {\n\tvar previous = child.previousSibling;\n\tvar next = child.nextSibling;\n\tif (previous) {\n\t\tprevious.nextSibling = next;\n\t} else {\n\t\tparentNode.firstChild = next;\n\t}\n\tif (next) {\n\t\tnext.previousSibling = previous;\n\t} else {\n\t\tparentNode.lastChild = previous;\n\t}\n\tchild.parentNode = null;\n\tchild.previousSibling = null;\n\tchild.nextSibling = null;\n\t_onUpdateChild(parentNode.ownerDocument, parentNode);\n\treturn child;\n}\n\n/**\n * Returns `true` if `node` can be a parent for insertion.\n * @param {Node} node\n * @returns {boolean}\n */\nfunction hasValidParentNodeType(node) {\n\treturn (\n\t\tnode &&\n\t\t(node.nodeType === Node.DOCUMENT_NODE || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE || node.nodeType === Node.ELEMENT_NODE)\n\t);\n}\n\n/**\n * Returns `true` if `node` can be inserted according to it's `nodeType`.\n * @param {Node} node\n * @returns {boolean}\n */\nfunction hasInsertableNodeType(node) {\n\treturn (\n\t\tnode &&\n\t\t(isElementNode(node) ||\n\t\t\tisTextNode(node) ||\n\t\t\tisDocTypeNode(node) ||\n\t\t\tnode.nodeType === Node.DOCUMENT_FRAGMENT_NODE ||\n\t\t\tnode.nodeType === Node.COMMENT_NODE ||\n\t\t\tnode.nodeType === Node.PROCESSING_INSTRUCTION_NODE)\n\t);\n}\n\n/**\n * Returns true if `node` is a DOCTYPE node\n * @param {Node} node\n * @returns {boolean}\n */\nfunction isDocTypeNode(node) {\n\treturn node && node.nodeType === Node.DOCUMENT_TYPE_NODE;\n}\n\n/**\n * Returns true if the node is an element\n * @param {Node} node\n * @returns {boolean}\n */\nfunction isElementNode(node) {\n\treturn node && node.nodeType === Node.ELEMENT_NODE;\n}\n/**\n * Returns true if `node` is a text node\n * @param {Node} node\n * @returns {boolean}\n */\nfunction isTextNode(node) {\n\treturn node && node.nodeType === Node.TEXT_NODE;\n}\n\n/**\n * Check if en element node can be inserted before `child`, or at the end if child is falsy,\n * according to the presence and position of a doctype node on the same level.\n *\n * @param {Document} doc The document node\n * @param {Node} child the node that would become the nextSibling if the element would be inserted\n * @returns {boolean} `true` if an element can be inserted before child\n * @private\n * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\nfunction isElementInsertionPossible(doc, child) {\n\tvar parentChildNodes = doc.childNodes || [];\n\tif (find(parentChildNodes, isElementNode) || isDocTypeNode(child)) {\n\t\treturn false;\n\t}\n\tvar docTypeNode = find(parentChildNodes, isDocTypeNode);\n\treturn !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));\n}\n\n/**\n * Check if en element node can be inserted before `child`, or at the end if child is falsy,\n * according to the presence and position of a doctype node on the same level.\n *\n * @param {Node} doc The document node\n * @param {Node} child the node that would become the nextSibling if the element would be inserted\n * @returns {boolean} `true` if an element can be inserted before child\n * @private\n * https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\nfunction isElementReplacementPossible(doc, child) {\n\tvar parentChildNodes = doc.childNodes || [];\n\n\tfunction hasElementChildThatIsNotChild(node) {\n\t\treturn isElementNode(node) && node !== child;\n\t}\n\n\tif (find(parentChildNodes, hasElementChildThatIsNotChild)) {\n\t\treturn false;\n\t}\n\tvar docTypeNode = find(parentChildNodes, isDocTypeNode);\n\treturn !(child && docTypeNode && parentChildNodes.indexOf(docTypeNode) > parentChildNodes.indexOf(child));\n}\n\n/**\n * @private\n * Steps 1-5 of the checks before inserting and before replacing a child are the same.\n *\n * @param {Node} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node=} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\nfunction assertPreInsertionValidity1to5(parent, node, child) {\n\t// 1. If `parent` is not a Document, DocumentFragment, or Element node, then throw a \"HierarchyRequestError\" DOMException.\n\tif (!hasValidParentNodeType(parent)) {\n\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Unexpected parent node type ' + parent.nodeType);\n\t}\n\t// 2. If `node` is a host-including inclusive ancestor of `parent`, then throw a \"HierarchyRequestError\" DOMException.\n\t// not implemented!\n\t// 3. If `child` is non-null and its parent is not `parent`, then throw a \"NotFoundError\" DOMException.\n\tif (child && child.parentNode !== parent) {\n\t\tthrow new DOMException(NOT_FOUND_ERR, 'child not in parent');\n\t}\n\tif (\n\t\t// 4. If `node` is not a DocumentFragment, DocumentType, Element, or CharacterData node, then throw a \"HierarchyRequestError\" DOMException.\n\t\t!hasInsertableNodeType(node) ||\n\t\t// 5. If either `node` is a Text node and `parent` is a document,\n\t\t// the sax parser currently adds top level text nodes, this will be fixed in 0.9.0\n\t\t// || (node.nodeType === Node.TEXT_NODE && parent.nodeType === Node.DOCUMENT_NODE)\n\t\t// or `node` is a doctype and `parent` is not a document, then throw a \"HierarchyRequestError\" DOMException.\n\t\t(isDocTypeNode(node) && parent.nodeType !== Node.DOCUMENT_NODE)\n\t) {\n\t\tthrow new DOMException(\n\t\t\tHIERARCHY_REQUEST_ERR,\n\t\t\t'Unexpected node type ' + node.nodeType + ' for parent node type ' + parent.nodeType\n\t\t);\n\t}\n}\n\n/**\n * @private\n * Step 6 of the checks before inserting and before replacing a child are different.\n *\n * @param {Document} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node | undefined} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\nfunction assertPreInsertionValidityInDocument(parent, node, child) {\n\tvar parentChildNodes = parent.childNodes || [];\n\tvar nodeChildNodes = node.childNodes || [];\n\n\t// DocumentFragment\n\tif (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {\n\t\tvar nodeChildElements = nodeChildNodes.filter(isElementNode);\n\t\t// If node has more than one element child or has a Text node child.\n\t\tif (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');\n\t\t}\n\t\t// Otherwise, if `node` has one element child and either `parent` has an element child,\n\t\t// `child` is a doctype, or `child` is non-null and a doctype is following `child`.\n\t\tif (nodeChildElements.length === 1 && !isElementInsertionPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');\n\t\t}\n\t}\n\t// Element\n\tif (isElementNode(node)) {\n\t\t// `parent` has an element child, `child` is a doctype,\n\t\t// or `child` is non-null and a doctype is following `child`.\n\t\tif (!isElementInsertionPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');\n\t\t}\n\t}\n\t// DocumentType\n\tif (isDocTypeNode(node)) {\n\t\t// `parent` has a doctype child,\n\t\tif (find(parentChildNodes, isDocTypeNode)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');\n\t\t}\n\t\tvar parentElementChild = find(parentChildNodes, isElementNode);\n\t\t// `child` is non-null and an element is preceding `child`,\n\t\tif (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');\n\t\t}\n\t\t// or `child` is null and `parent` has an element child.\n\t\tif (!child && parentElementChild) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can not be appended since element is present');\n\t\t}\n\t}\n}\n\n/**\n * @private\n * Step 6 of the checks before inserting and before replacing a child are different.\n *\n * @param {Document} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node | undefined} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n * @see https://dom.spec.whatwg.org/#concept-node-replace\n */\nfunction assertPreReplacementValidityInDocument(parent, node, child) {\n\tvar parentChildNodes = parent.childNodes || [];\n\tvar nodeChildNodes = node.childNodes || [];\n\n\t// DocumentFragment\n\tif (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE) {\n\t\tvar nodeChildElements = nodeChildNodes.filter(isElementNode);\n\t\t// If `node` has more than one element child or has a Text node child.\n\t\tif (nodeChildElements.length > 1 || find(nodeChildNodes, isTextNode)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'More than one element or text in fragment');\n\t\t}\n\t\t// Otherwise, if `node` has one element child and either `parent` has an element child that is not `child` or a doctype is following `child`.\n\t\tif (nodeChildElements.length === 1 && !isElementReplacementPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Element in fragment can not be inserted before doctype');\n\t\t}\n\t}\n\t// Element\n\tif (isElementNode(node)) {\n\t\t// `parent` has an element child that is not `child` or a doctype is following `child`.\n\t\tif (!isElementReplacementPossible(parent, child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one element can be added and only after doctype');\n\t\t}\n\t}\n\t// DocumentType\n\tif (isDocTypeNode(node)) {\n\t\tfunction hasDoctypeChildThatIsNotChild(node) {\n\t\t\treturn isDocTypeNode(node) && node !== child;\n\t\t}\n\n\t\t// `parent` has a doctype child that is not `child`,\n\t\tif (find(parentChildNodes, hasDoctypeChildThatIsNotChild)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Only one doctype is allowed');\n\t\t}\n\t\tvar parentElementChild = find(parentChildNodes, isElementNode);\n\t\t// or an element is preceding `child`.\n\t\tif (child && parentChildNodes.indexOf(parentElementChild) < parentChildNodes.indexOf(child)) {\n\t\t\tthrow new DOMException(HIERARCHY_REQUEST_ERR, 'Doctype can only be inserted before an element');\n\t\t}\n\t}\n}\n\n/**\n * @private\n * @param {Node} parent the parent node to insert `node` into\n * @param {Node} node the node to insert\n * @param {Node=} child the node that should become the `nextSibling` of `node`\n * @returns {Node}\n * @throws DOMException for several node combinations that would create a DOM that is not well-formed.\n * @throws DOMException if `child` is provided but is not a child of `parent`.\n * @see https://dom.spec.whatwg.org/#concept-node-ensure-pre-insertion-validity\n */\nfunction _insertBefore(parent, node, child, _inDocumentAssertion) {\n\t// To ensure pre-insertion validity of a node into a parent before a child, run these steps:\n\tassertPreInsertionValidity1to5(parent, node, child);\n\n\t// If parent is a document, and any of the statements below, switched on the interface node implements,\n\t// are true, then throw a \"HierarchyRequestError\" DOMException.\n\tif (parent.nodeType === Node.DOCUMENT_NODE) {\n\t\t(_inDocumentAssertion || assertPreInsertionValidityInDocument)(parent, node, child);\n\t}\n\n\tvar cp = node.parentNode;\n\tif(cp){\n\t\tcp.removeChild(node);//remove and update\n\t}\n\tif(node.nodeType === DOCUMENT_FRAGMENT_NODE){\n\t\tvar newFirst = node.firstChild;\n\t\tif (newFirst == null) {\n\t\t\treturn node;\n\t\t}\n\t\tvar newLast = node.lastChild;\n\t}else{\n\t\tnewFirst = newLast = node;\n\t}\n\tvar pre = child ? child.previousSibling : parent.lastChild;\n\n\tnewFirst.previousSibling = pre;\n\tnewLast.nextSibling = child;\n\n\n\tif(pre){\n\t\tpre.nextSibling = newFirst;\n\t}else{\n\t\tparent.firstChild = newFirst;\n\t}\n\tif(child == null){\n\t\tparent.lastChild = newLast;\n\t}else{\n\t\tchild.previousSibling = newLast;\n\t}\n\tdo{\n\t\tnewFirst.parentNode = parent;\n\t}while(newFirst !== newLast && (newFirst= newFirst.nextSibling))\n\t_onUpdateChild(parent.ownerDocument||parent, parent);\n\t//console.log(parent.lastChild.nextSibling == null)\n\tif (node.nodeType == DOCUMENT_FRAGMENT_NODE) {\n\t\tnode.firstChild = node.lastChild = null;\n\t}\n\treturn node;\n}\n\n/**\n * Appends `newChild` to `parentNode`.\n * If `newChild` is already connected to a `parentNode` it is first removed from it.\n *\n * @see https://github.com/xmldom/xmldom/issues/135\n * @see https://github.com/xmldom/xmldom/issues/145\n * @param {Node} parentNode\n * @param {Node} newChild\n * @returns {Node}\n * @private\n */\nfunction _appendSingleChild (parentNode, newChild) {\n\tif (newChild.parentNode) {\n\t\tnewChild.parentNode.removeChild(newChild);\n\t}\n\tnewChild.parentNode = parentNode;\n\tnewChild.previousSibling = parentNode.lastChild;\n\tnewChild.nextSibling = null;\n\tif (newChild.previousSibling) {\n\t\tnewChild.previousSibling.nextSibling = newChild;\n\t} else {\n\t\tparentNode.firstChild = newChild;\n\t}\n\tparentNode.lastChild = newChild;\n\t_onUpdateChild(parentNode.ownerDocument, parentNode, newChild);\n\treturn newChild;\n}\n\nDocument.prototype = {\n\t//implementation : null,\n\tnodeName :  '#document',\n\tnodeType :  DOCUMENT_NODE,\n\t/**\n\t * The DocumentType node of the document.\n\t *\n\t * @readonly\n\t * @type DocumentType\n\t */\n\tdoctype :  null,\n\tdocumentElement :  null,\n\t_inc : 1,\n\n\tinsertBefore :  function(newChild, refChild){//raises\n\t\tif(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){\n\t\t\tvar child = newChild.firstChild;\n\t\t\twhile(child){\n\t\t\t\tvar next = child.nextSibling;\n\t\t\t\tthis.insertBefore(child,refChild);\n\t\t\t\tchild = next;\n\t\t\t}\n\t\t\treturn newChild;\n\t\t}\n\t\t_insertBefore(this, newChild, refChild);\n\t\tnewChild.ownerDocument = this;\n\t\tif (this.documentElement === null && newChild.nodeType === ELEMENT_NODE) {\n\t\t\tthis.documentElement = newChild;\n\t\t}\n\n\t\treturn newChild;\n\t},\n\tremoveChild :  function(oldChild){\n\t\tif(this.documentElement == oldChild){\n\t\t\tthis.documentElement = null;\n\t\t}\n\t\treturn _removeChild(this,oldChild);\n\t},\n\treplaceChild: function (newChild, oldChild) {\n\t\t//raises\n\t\t_insertBefore(this, newChild, oldChild, assertPreReplacementValidityInDocument);\n\t\tnewChild.ownerDocument = this;\n\t\tif (oldChild) {\n\t\t\tthis.removeChild(oldChild);\n\t\t}\n\t\tif (isElementNode(newChild)) {\n\t\t\tthis.documentElement = newChild;\n\t\t}\n\t},\n\t// Introduced in DOM Level 2:\n\timportNode : function(importedNode,deep){\n\t\treturn importNode(this,importedNode,deep);\n\t},\n\t// Introduced in DOM Level 2:\n\tgetElementById :\tfunction(id){\n\t\tvar rtv = null;\n\t\t_visitNode(this.documentElement,function(node){\n\t\t\tif(node.nodeType == ELEMENT_NODE){\n\t\t\t\tif(node.getAttribute('id') == id){\n\t\t\t\t\trtv = node;\n\t\t\t\t\treturn true;\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\t\treturn rtv;\n\t},\n\n\t/**\n\t * The `getElementsByClassName` method of `Document` interface returns an array-like object\n\t * of all child elements which have **all** of the given class name(s).\n\t *\n\t * Returns an empty list if `classeNames` is an empty string or only contains HTML white space characters.\n\t *\n\t *\n\t * Warning: This is a live LiveNodeList.\n\t * Changes in the DOM will reflect in the array as the changes occur.\n\t * If an element selected by this array no longer qualifies for the selector,\n\t * it will automatically be removed. Be aware of this for iteration purposes.\n\t *\n\t * @param {string} classNames is a string representing the class name(s) to match; multiple class names are separated by (ASCII-)whitespace\n\t *\n\t * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementsByClassName\n\t * @see https://dom.spec.whatwg.org/#concept-getelementsbyclassname\n\t */\n\tgetElementsByClassName: function(classNames) {\n\t\tvar classNamesSet = toOrderedSet(classNames)\n\t\treturn new LiveNodeList(this, function(base) {\n\t\t\tvar ls = [];\n\t\t\tif (classNamesSet.length > 0) {\n\t\t\t\t_visitNode(base.documentElement, function(node) {\n\t\t\t\t\tif(node !== base && node.nodeType === ELEMENT_NODE) {\n\t\t\t\t\t\tvar nodeClassNames = node.getAttribute('class')\n\t\t\t\t\t\t// can be null if the attribute does not exist\n\t\t\t\t\t\tif (nodeClassNames) {\n\t\t\t\t\t\t\t// before splitting and iterating just compare them for the most common case\n\t\t\t\t\t\t\tvar matches = classNames === nodeClassNames;\n\t\t\t\t\t\t\tif (!matches) {\n\t\t\t\t\t\t\t\tvar nodeClassNamesSet = toOrderedSet(nodeClassNames)\n\t\t\t\t\t\t\t\tmatches = classNamesSet.every(arrayIncludes(nodeClassNamesSet))\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\tif(matches) {\n\t\t\t\t\t\t\t\tls.push(node);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t}\n\t\t\t\t\t}\n\t\t\t\t});\n\t\t\t}\n\t\t\treturn ls;\n\t\t});\n\t},\n\n\t//document factory method:\n\tcreateElement :\tfunction(tagName){\n\t\tvar node = new Element();\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = tagName;\n\t\tnode.tagName = tagName;\n\t\tnode.localName = tagName;\n\t\tnode.childNodes = new NodeList();\n\t\tvar attrs\t= node.attributes = new NamedNodeMap();\n\t\tattrs._ownerElement = node;\n\t\treturn node;\n\t},\n\tcreateDocumentFragment :\tfunction(){\n\t\tvar node = new DocumentFragment();\n\t\tnode.ownerDocument = this;\n\t\tnode.childNodes = new NodeList();\n\t\treturn node;\n\t},\n\tcreateTextNode :\tfunction(data){\n\t\tvar node = new Text();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateComment :\tfunction(data){\n\t\tvar node = new Comment();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateCDATASection :\tfunction(data){\n\t\tvar node = new CDATASection();\n\t\tnode.ownerDocument = this;\n\t\tnode.appendData(data)\n\t\treturn node;\n\t},\n\tcreateProcessingInstruction :\tfunction(target,data){\n\t\tvar node = new ProcessingInstruction();\n\t\tnode.ownerDocument = this;\n\t\tnode.tagName = node.nodeName = node.target = target;\n\t\tnode.nodeValue = node.data = data;\n\t\treturn node;\n\t},\n\tcreateAttribute :\tfunction(name){\n\t\tvar node = new Attr();\n\t\tnode.ownerDocument\t= this;\n\t\tnode.name = name;\n\t\tnode.nodeName\t= name;\n\t\tnode.localName = name;\n\t\tnode.specified = true;\n\t\treturn node;\n\t},\n\tcreateEntityReference :\tfunction(name){\n\t\tvar node = new EntityReference();\n\t\tnode.ownerDocument\t= this;\n\t\tnode.nodeName\t= name;\n\t\treturn node;\n\t},\n\t// Introduced in DOM Level 2:\n\tcreateElementNS :\tfunction(namespaceURI,qualifiedName){\n\t\tvar node = new Element();\n\t\tvar pl = qualifiedName.split(':');\n\t\tvar attrs\t= node.attributes = new NamedNodeMap();\n\t\tnode.childNodes = new NodeList();\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.tagName = qualifiedName;\n\t\tnode.namespaceURI = namespaceURI;\n\t\tif(pl.length == 2){\n\t\t\tnode.prefix = pl[0];\n\t\t\tnode.localName = pl[1];\n\t\t}else{\n\t\t\t//el.prefix = null;\n\t\t\tnode.localName = qualifiedName;\n\t\t}\n\t\tattrs._ownerElement = node;\n\t\treturn node;\n\t},\n\t// Introduced in DOM Level 2:\n\tcreateAttributeNS :\tfunction(namespaceURI,qualifiedName){\n\t\tvar node = new Attr();\n\t\tvar pl = qualifiedName.split(':');\n\t\tnode.ownerDocument = this;\n\t\tnode.nodeName = qualifiedName;\n\t\tnode.name = qualifiedName;\n\t\tnode.namespaceURI = namespaceURI;\n\t\tnode.specified = true;\n\t\tif(pl.length == 2){\n\t\t\tnode.prefix = pl[0];\n\t\t\tnode.localName = pl[1];\n\t\t}else{\n\t\t\t//el.prefix = null;\n\t\t\tnode.localName = qualifiedName;\n\t\t}\n\t\treturn node;\n\t}\n};\n_extends(Document,Node);\n\n\nfunction Element() {\n\tthis._nsMap = {};\n};\nElement.prototype = {\n\tnodeType : ELEMENT_NODE,\n\thasAttribute : function(name){\n\t\treturn this.getAttributeNode(name)!=null;\n\t},\n\tgetAttribute : function(name){\n\t\tvar attr = this.getAttributeNode(name);\n\t\treturn attr && attr.value || '';\n\t},\n\tgetAttributeNode : function(name){\n\t\treturn this.attributes.getNamedItem(name);\n\t},\n\tsetAttribute : function(name, value){\n\t\tvar attr = this.ownerDocument.createAttribute(name);\n\t\tattr.value = attr.nodeValue = \"\" + value;\n\t\tthis.setAttributeNode(attr)\n\t},\n\tremoveAttribute : function(name){\n\t\tvar attr = this.getAttributeNode(name)\n\t\tattr && this.removeAttributeNode(attr);\n\t},\n\n\t//four real opeartion method\n\tappendChild:function(newChild){\n\t\tif(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){\n\t\t\treturn this.insertBefore(newChild,null);\n\t\t}else{\n\t\t\treturn _appendSingleChild(this,newChild);\n\t\t}\n\t},\n\tsetAttributeNode : function(newAttr){\n\t\treturn this.attributes.setNamedItem(newAttr);\n\t},\n\tsetAttributeNodeNS : function(newAttr){\n\t\treturn this.attributes.setNamedItemNS(newAttr);\n\t},\n\tremoveAttributeNode : function(oldAttr){\n\t\t//console.log(this == oldAttr.ownerElement)\n\t\treturn this.attributes.removeNamedItem(oldAttr.nodeName);\n\t},\n\t//get real attribute name,and remove it by removeAttributeNode\n\tremoveAttributeNS : function(namespaceURI, localName){\n\t\tvar old = this.getAttributeNodeNS(namespaceURI, localName);\n\t\told && this.removeAttributeNode(old);\n\t},\n\n\thasAttributeNS : function(namespaceURI, localName){\n\t\treturn this.getAttributeNodeNS(namespaceURI, localName)!=null;\n\t},\n\tgetAttributeNS : function(namespaceURI, localName){\n\t\tvar attr = this.getAttributeNodeNS(namespaceURI, localName);\n\t\treturn attr && attr.value || '';\n\t},\n\tsetAttributeNS : function(namespaceURI, qualifiedName, value){\n\t\tvar attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);\n\t\tattr.value = attr.nodeValue = \"\" + value;\n\t\tthis.setAttributeNode(attr)\n\t},\n\tgetAttributeNodeNS : function(namespaceURI, localName){\n\t\treturn this.attributes.getNamedItemNS(namespaceURI, localName);\n\t},\n\n\tgetElementsByTagName : function(tagName){\n\t\treturn new LiveNodeList(this,function(base){\n\t\t\tvar ls = [];\n\t\t\t_visitNode(base,function(node){\n\t\t\t\tif(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){\n\t\t\t\t\tls.push(node);\n\t\t\t\t}\n\t\t\t});\n\t\t\treturn ls;\n\t\t});\n\t},\n\tgetElementsByTagNameNS : function(namespaceURI, localName){\n\t\treturn new LiveNodeList(this,function(base){\n\t\t\tvar ls = [];\n\t\t\t_visitNode(base,function(node){\n\t\t\t\tif(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){\n\t\t\t\t\tls.push(node);\n\t\t\t\t}\n\t\t\t});\n\t\t\treturn ls;\n\n\t\t});\n\t}\n};\nDocument.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;\nDocument.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;\n\n\n_extends(Element,Node);\nfunction Attr() {\n};\nAttr.prototype.nodeType = ATTRIBUTE_NODE;\n_extends(Attr,Node);\n\n\nfunction CharacterData() {\n};\nCharacterData.prototype = {\n\tdata : '',\n\tsubstringData : function(offset, count) {\n\t\treturn this.data.substring(offset, offset+count);\n\t},\n\tappendData: function(text) {\n\t\ttext = this.data+text;\n\t\tthis.nodeValue = this.data = text;\n\t\tthis.length = text.length;\n\t},\n\tinsertData: function(offset,text) {\n\t\tthis.replaceData(offset,0,text);\n\n\t},\n\tappendChild:function(newChild){\n\t\tthrow new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])\n\t},\n\tdeleteData: function(offset, count) {\n\t\tthis.replaceData(offset,count,\"\");\n\t},\n\treplaceData: function(offset, count, text) {\n\t\tvar start = this.data.substring(0,offset);\n\t\tvar end = this.data.substring(offset+count);\n\t\ttext = start + text + end;\n\t\tthis.nodeValue = this.data = text;\n\t\tthis.length = text.length;\n\t}\n}\n_extends(CharacterData,Node);\nfunction Text() {\n};\nText.prototype = {\n\tnodeName : \"#text\",\n\tnodeType : TEXT_NODE,\n\tsplitText : function(offset) {\n\t\tvar text = this.data;\n\t\tvar newText = text.substring(offset);\n\t\ttext = text.substring(0, offset);\n\t\tthis.data = this.nodeValue = text;\n\t\tthis.length = text.length;\n\t\tvar newNode = this.ownerDocument.createTextNode(newText);\n\t\tif(this.parentNode){\n\t\t\tthis.parentNode.insertBefore(newNode, this.nextSibling);\n\t\t}\n\t\treturn newNode;\n\t}\n}\n_extends(Text,CharacterData);\nfunction Comment() {\n};\nComment.prototype = {\n\tnodeName : \"#comment\",\n\tnodeType : COMMENT_NODE\n}\n_extends(Comment,CharacterData);\n\nfunction CDATASection() {\n};\nCDATASection.prototype = {\n\tnodeName : \"#cdata-section\",\n\tnodeType : CDATA_SECTION_NODE\n}\n_extends(CDATASection,CharacterData);\n\n\nfunction DocumentType() {\n};\nDocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;\n_extends(DocumentType,Node);\n\nfunction Notation() {\n};\nNotation.prototype.nodeType = NOTATION_NODE;\n_extends(Notation,Node);\n\nfunction Entity() {\n};\nEntity.prototype.nodeType = ENTITY_NODE;\n_extends(Entity,Node);\n\nfunction EntityReference() {\n};\nEntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;\n_extends(EntityReference,Node);\n\nfunction DocumentFragment() {\n};\nDocumentFragment.prototype.nodeName =\t\"#document-fragment\";\nDocumentFragment.prototype.nodeType =\tDOCUMENT_FRAGMENT_NODE;\n_extends(DocumentFragment,Node);\n\n\nfunction ProcessingInstruction() {\n}\nProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;\n_extends(ProcessingInstruction,Node);\nfunction XMLSerializer(){}\nXMLSerializer.prototype.serializeToString = function(node,isHtml,nodeFilter){\n\treturn nodeSerializeToString.call(node,isHtml,nodeFilter);\n}\nNode.prototype.toString = nodeSerializeToString;\nfunction nodeSerializeToString(isHtml,nodeFilter){\n\tvar buf = [];\n\tvar refNode = this.nodeType == 9 && this.documentElement || this;\n\tvar prefix = refNode.prefix;\n\tvar uri = refNode.namespaceURI;\n\n\tif(uri && prefix == null){\n\t\t//console.log(prefix)\n\t\tvar prefix = refNode.lookupPrefix(uri);\n\t\tif(prefix == null){\n\t\t\t//isHTML = true;\n\t\t\tvar visibleNamespaces=[\n\t\t\t{namespace:uri,prefix:null}\n\t\t\t//{namespace:uri,prefix:''}\n\t\t\t]\n\t\t}\n\t}\n\tserializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);\n\t//console.log('###',this.nodeType,uri,prefix,buf.join(''))\n\treturn buf.join('');\n}\n\nfunction needNamespaceDefine(node, isHTML, visibleNamespaces) {\n\tvar prefix = node.prefix || '';\n\tvar uri = node.namespaceURI;\n\t// According to [Namespaces in XML 1.0](https://www.w3.org/TR/REC-xml-names/#ns-using) ,\n\t// and more specifically https://www.w3.org/TR/REC-xml-names/#nsc-NoPrefixUndecl :\n\t// > In a namespace declaration for a prefix [...], the attribute value MUST NOT be empty.\n\t// in a similar manner [Namespaces in XML 1.1](https://www.w3.org/TR/xml-names11/#ns-using)\n\t// and more specifically https://www.w3.org/TR/xml-names11/#nsc-NSDeclared :\n\t// > [...] Furthermore, the attribute value [...] must not be an empty string.\n\t// so serializing empty namespace value like xmlns:ds=\"\" would produce an invalid XML document.\n\tif (!uri) {\n\t\treturn false;\n\t}\n\tif (prefix === \"xml\" && uri === NAMESPACE.XML || uri === NAMESPACE.XMLNS) {\n\t\treturn false;\n\t}\n\n\tvar i = visibleNamespaces.length\n\twhile (i--) {\n\t\tvar ns = visibleNamespaces[i];\n\t\t// get namespace prefix\n\t\tif (ns.prefix === prefix) {\n\t\t\treturn ns.namespace !== uri;\n\t\t}\n\t}\n\treturn true;\n}\n/**\n * Well-formed constraint: No < in Attribute Values\n * > The replacement text of any entity referred to directly or indirectly\n * > in an attribute value must not contain a <.\n * @see https://www.w3.org/TR/xml11/#CleanAttrVals\n * @see https://www.w3.org/TR/xml11/#NT-AttValue\n *\n * Literal whitespace other than space that appear in attribute values\n * are serialized as their entity references, so they will be preserved.\n * (In contrast to whitespace literals in the input which are normalized to spaces)\n * @see https://www.w3.org/TR/xml11/#AVNormalize\n * @see https://w3c.github.io/DOM-Parsing/#serializing-an-element-s-attributes\n */\nfunction addSerializedAttribute(buf, qualifiedName, value) {\n\tbuf.push(' ', qualifiedName, '=\"', value.replace(/[<>&\"\\t\\n\\r]/g, _xmlEncoder), '\"')\n}\n\nfunction serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){\n\tif (!visibleNamespaces) {\n\t\tvisibleNamespaces = [];\n\t}\n\n\tif(nodeFilter){\n\t\tnode = nodeFilter(node);\n\t\tif(node){\n\t\t\tif(typeof node == 'string'){\n\t\t\t\tbuf.push(node);\n\t\t\t\treturn;\n\t\t\t}\n\t\t}else{\n\t\t\treturn;\n\t\t}\n\t\t//buf.sort.apply(attrs, attributeSorter);\n\t}\n\n\tswitch(node.nodeType){\n\tcase ELEMENT_NODE:\n\t\tvar attrs = node.attributes;\n\t\tvar len = attrs.length;\n\t\tvar child = node.firstChild;\n\t\tvar nodeName = node.tagName;\n\n\t\tisHTML = NAMESPACE.isHTML(node.namespaceURI) || isHTML\n\n\t\tvar prefixedNodeName = nodeName\n\t\tif (!isHTML && !node.prefix && node.namespaceURI) {\n\t\t\tvar defaultNS\n\t\t\t// lookup current default ns from `xmlns` attribute\n\t\t\tfor (var ai = 0; ai < attrs.length; ai++) {\n\t\t\t\tif (attrs.item(ai).name === 'xmlns') {\n\t\t\t\t\tdefaultNS = attrs.item(ai).value\n\t\t\t\t\tbreak\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (!defaultNS) {\n\t\t\t\t// lookup current default ns in visibleNamespaces\n\t\t\t\tfor (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n\t\t\t\t\tvar namespace = visibleNamespaces[nsi]\n\t\t\t\t\tif (namespace.prefix === '' && namespace.namespace === node.namespaceURI) {\n\t\t\t\t\t\tdefaultNS = namespace.namespace\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (defaultNS !== node.namespaceURI) {\n\t\t\t\tfor (var nsi = visibleNamespaces.length - 1; nsi >= 0; nsi--) {\n\t\t\t\t\tvar namespace = visibleNamespaces[nsi]\n\t\t\t\t\tif (namespace.namespace === node.namespaceURI) {\n\t\t\t\t\t\tif (namespace.prefix) {\n\t\t\t\t\t\t\tprefixedNodeName = namespace.prefix + ':' + nodeName\n\t\t\t\t\t\t}\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tbuf.push('<', prefixedNodeName);\n\n\t\tfor(var i=0;i<len;i++){\n\t\t\t// add namespaces for attributes\n\t\t\tvar attr = attrs.item(i);\n\t\t\tif (attr.prefix == 'xmlns') {\n\t\t\t\tvisibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });\n\t\t\t}else if(attr.nodeName == 'xmlns'){\n\t\t\t\tvisibleNamespaces.push({ prefix: '', namespace: attr.value });\n\t\t\t}\n\t\t}\n\n\t\tfor(var i=0;i<len;i++){\n\t\t\tvar attr = attrs.item(i);\n\t\t\tif (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {\n\t\t\t\tvar prefix = attr.prefix||'';\n\t\t\t\tvar uri = attr.namespaceURI;\n\t\t\t\taddSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n\t\t\t\tvisibleNamespaces.push({ prefix: prefix, namespace:uri });\n\t\t\t}\n\t\t\tserializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);\n\t\t}\n\n\t\t// add namespace for current node\n\t\tif (nodeName === prefixedNodeName && needNamespaceDefine(node, isHTML, visibleNamespaces)) {\n\t\t\tvar prefix = node.prefix||'';\n\t\t\tvar uri = node.namespaceURI;\n\t\t\taddSerializedAttribute(buf, prefix ? 'xmlns:' + prefix : \"xmlns\", uri);\n\t\t\tvisibleNamespaces.push({ prefix: prefix, namespace:uri });\n\t\t}\n\n\t\tif(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){\n\t\t\tbuf.push('>');\n\t\t\t//if is cdata child node\n\t\t\tif(isHTML && /^script$/i.test(nodeName)){\n\t\t\t\twhile(child){\n\t\t\t\t\tif(child.data){\n\t\t\t\t\t\tbuf.push(child.data);\n\t\t\t\t\t}else{\n\t\t\t\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\t\t\t}\n\t\t\t\t\tchild = child.nextSibling;\n\t\t\t\t}\n\t\t\t}else\n\t\t\t{\n\t\t\t\twhile(child){\n\t\t\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\t\t\tchild = child.nextSibling;\n\t\t\t\t}\n\t\t\t}\n\t\t\tbuf.push('</',prefixedNodeName,'>');\n\t\t}else{\n\t\t\tbuf.push('/>');\n\t\t}\n\t\t// remove added visible namespaces\n\t\t//visibleNamespaces.length = startVisibleNamespaces;\n\t\treturn;\n\tcase DOCUMENT_NODE:\n\tcase DOCUMENT_FRAGMENT_NODE:\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tserializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces.slice());\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t\treturn;\n\tcase ATTRIBUTE_NODE:\n\t\treturn addSerializedAttribute(buf, node.name, node.value);\n\tcase TEXT_NODE:\n\t\t/**\n\t\t * The ampersand character (&) and the left angle bracket (<) must not appear in their literal form,\n\t\t * except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.\n\t\t * If they are needed elsewhere, they must be escaped using either numeric character references or the strings\n\t\t * `&amp;` and `&lt;` respectively.\n\t\t * The right angle bracket (>) may be represented using the string \" &gt; \", and must, for compatibility,\n\t\t * be escaped using either `&gt;` or a character reference when it appears in the string `]]>` in content,\n\t\t * when that string is not marking the end of a CDATA section.\n\t\t *\n\t\t * In the content of elements, character data is any string of characters\n\t\t * which does not contain the start-delimiter of any markup\n\t\t * and does not include the CDATA-section-close delimiter, `]]>`.\n\t\t *\n\t\t * @see https://www.w3.org/TR/xml/#NT-CharData\n\t\t * @see https://w3c.github.io/DOM-Parsing/#xml-serializing-a-text-node\n\t\t */\n\t\treturn buf.push(node.data\n\t\t\t.replace(/[<&>]/g,_xmlEncoder)\n\t\t);\n\tcase CDATA_SECTION_NODE:\n\t\treturn buf.push( '<![CDATA[',node.data,']]>');\n\tcase COMMENT_NODE:\n\t\treturn buf.push( \"<!--\",node.data,\"-->\");\n\tcase DOCUMENT_TYPE_NODE:\n\t\tvar pubid = node.publicId;\n\t\tvar sysid = node.systemId;\n\t\tbuf.push('<!DOCTYPE ',node.name);\n\t\tif(pubid){\n\t\t\tbuf.push(' PUBLIC ', pubid);\n\t\t\tif (sysid && sysid!='.') {\n\t\t\t\tbuf.push(' ', sysid);\n\t\t\t}\n\t\t\tbuf.push('>');\n\t\t}else if(sysid && sysid!='.'){\n\t\t\tbuf.push(' SYSTEM ', sysid, '>');\n\t\t}else{\n\t\t\tvar sub = node.internalSubset;\n\t\t\tif(sub){\n\t\t\t\tbuf.push(\" [\",sub,\"]\");\n\t\t\t}\n\t\t\tbuf.push(\">\");\n\t\t}\n\t\treturn;\n\tcase PROCESSING_INSTRUCTION_NODE:\n\t\treturn buf.push( \"<?\",node.target,\" \",node.data,\"?>\");\n\tcase ENTITY_REFERENCE_NODE:\n\t\treturn buf.push( '&',node.nodeName,';');\n\t//case ENTITY_NODE:\n\t//case NOTATION_NODE:\n\tdefault:\n\t\tbuf.push('??',node.nodeName);\n\t}\n}\nfunction importNode(doc,node,deep){\n\tvar node2;\n\tswitch (node.nodeType) {\n\tcase ELEMENT_NODE:\n\t\tnode2 = node.cloneNode(false);\n\t\tnode2.ownerDocument = doc;\n\t\t//var attrs = node2.attributes;\n\t\t//var len = attrs.length;\n\t\t//for(var i=0;i<len;i++){\n\t\t\t//node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));\n\t\t//}\n\tcase DOCUMENT_FRAGMENT_NODE:\n\t\tbreak;\n\tcase ATTRIBUTE_NODE:\n\t\tdeep = true;\n\t\tbreak;\n\t//case ENTITY_REFERENCE_NODE:\n\t//case PROCESSING_INSTRUCTION_NODE:\n\t////case TEXT_NODE:\n\t//case CDATA_SECTION_NODE:\n\t//case COMMENT_NODE:\n\t//\tdeep = false;\n\t//\tbreak;\n\t//case DOCUMENT_NODE:\n\t//case DOCUMENT_TYPE_NODE:\n\t//cannot be imported.\n\t//case ENTITY_NODE:\n\t//case NOTATION_NODE：\n\t//can not hit in level3\n\t//default:throw e;\n\t}\n\tif(!node2){\n\t\tnode2 = node.cloneNode(false);//false\n\t}\n\tnode2.ownerDocument = doc;\n\tnode2.parentNode = null;\n\tif(deep){\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tnode2.appendChild(importNode(doc,child,deep));\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t}\n\treturn node2;\n}\n//\n//var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,\n//\t\t\t\t\tattributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};\nfunction cloneNode(doc,node,deep){\n\tvar node2 = new node.constructor();\n\tfor (var n in node) {\n\t\tif (Object.prototype.hasOwnProperty.call(node, n)) {\n\t\t\tvar v = node[n];\n\t\t\tif (typeof v != \"object\") {\n\t\t\t\tif (v != node2[n]) {\n\t\t\t\t\tnode2[n] = v;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\tif(node.childNodes){\n\t\tnode2.childNodes = new NodeList();\n\t}\n\tnode2.ownerDocument = doc;\n\tswitch (node2.nodeType) {\n\tcase ELEMENT_NODE:\n\t\tvar attrs\t= node.attributes;\n\t\tvar attrs2\t= node2.attributes = new NamedNodeMap();\n\t\tvar len = attrs.length\n\t\tattrs2._ownerElement = node2;\n\t\tfor(var i=0;i<len;i++){\n\t\t\tnode2.setAttributeNode(cloneNode(doc,attrs.item(i),true));\n\t\t}\n\t\tbreak;;\n\tcase ATTRIBUTE_NODE:\n\t\tdeep = true;\n\t}\n\tif(deep){\n\t\tvar child = node.firstChild;\n\t\twhile(child){\n\t\t\tnode2.appendChild(cloneNode(doc,child,deep));\n\t\t\tchild = child.nextSibling;\n\t\t}\n\t}\n\treturn node2;\n}\n\nfunction __set__(object,key,value){\n\tobject[key] = value\n}\n//do dynamic\ntry{\n\tif(Object.defineProperty){\n\t\tObject.defineProperty(LiveNodeList.prototype,'length',{\n\t\t\tget:function(){\n\t\t\t\t_updateLiveList(this);\n\t\t\t\treturn this.$$length;\n\t\t\t}\n\t\t});\n\n\t\tObject.defineProperty(Node.prototype,'textContent',{\n\t\t\tget:function(){\n\t\t\t\treturn getTextContent(this);\n\t\t\t},\n\n\t\t\tset:function(data){\n\t\t\t\tswitch(this.nodeType){\n\t\t\t\tcase ELEMENT_NODE:\n\t\t\t\tcase DOCUMENT_FRAGMENT_NODE:\n\t\t\t\t\twhile(this.firstChild){\n\t\t\t\t\t\tthis.removeChild(this.firstChild);\n\t\t\t\t\t}\n\t\t\t\t\tif(data || String(data)){\n\t\t\t\t\t\tthis.appendChild(this.ownerDocument.createTextNode(data));\n\t\t\t\t\t}\n\t\t\t\t\tbreak;\n\n\t\t\t\tdefault:\n\t\t\t\t\tthis.data = data;\n\t\t\t\t\tthis.value = data;\n\t\t\t\t\tthis.nodeValue = data;\n\t\t\t\t}\n\t\t\t}\n\t\t})\n\n\t\tfunction getTextContent(node){\n\t\t\tswitch(node.nodeType){\n\t\t\tcase ELEMENT_NODE:\n\t\t\tcase DOCUMENT_FRAGMENT_NODE:\n\t\t\t\tvar buf = [];\n\t\t\t\tnode = node.firstChild;\n\t\t\t\twhile(node){\n\t\t\t\t\tif(node.nodeType!==7 && node.nodeType !==8){\n\t\t\t\t\t\tbuf.push(getTextContent(node));\n\t\t\t\t\t}\n\t\t\t\t\tnode = node.nextSibling;\n\t\t\t\t}\n\t\t\t\treturn buf.join('');\n\t\t\tdefault:\n\t\t\t\treturn node.nodeValue;\n\t\t\t}\n\t\t}\n\n\t\t__set__ = function(object,key,value){\n\t\t\t//console.log(value)\n\t\t\tobject['$$'+key] = value\n\t\t}\n\t}\n}catch(e){//ie8\n}\n\n//if(typeof require == 'function'){\n\texports.DocumentType = DocumentType;\n\texports.DOMException = DOMException;\n\texports.DOMImplementation = DOMImplementation;\n\texports.Element = Element;\n\texports.Node = Node;\n\texports.NodeList = NodeList;\n\texports.XMLSerializer = XMLSerializer;\n//}\n","var elliptic = require('elliptic')\nvar BN = require('bn.js')\n\nmodule.exports = function createECDH (curve) {\n  return new ECDH(curve)\n}\n\nvar aliases = {\n  secp256k1: {\n    name: 'secp256k1',\n    byteLength: 32\n  },\n  secp224r1: {\n    name: 'p224',\n    byteLength: 28\n  },\n  prime256v1: {\n    name: 'p256',\n    byteLength: 32\n  },\n  prime192v1: {\n    name: 'p192',\n    byteLength: 24\n  },\n  ed25519: {\n    name: 'ed25519',\n    byteLength: 32\n  },\n  secp384r1: {\n    name: 'p384',\n    byteLength: 48\n  },\n  secp521r1: {\n    name: 'p521',\n    byteLength: 66\n  }\n}\n\naliases.p224 = aliases.secp224r1\naliases.p256 = aliases.secp256r1 = aliases.prime256v1\naliases.p192 = aliases.secp192r1 = aliases.prime192v1\naliases.p384 = aliases.secp384r1\naliases.p521 = aliases.secp521r1\n\nfunction ECDH (curve) {\n  this.curveType = aliases[curve]\n  if (!this.curveType) {\n    this.curveType = {\n      name: curve\n    }\n  }\n  this.curve = new elliptic.ec(this.curveType.name) // eslint-disable-line new-cap\n  this.keys = void 0\n}\n\nECDH.prototype.generateKeys = function (enc, format) {\n  this.keys = this.curve.genKeyPair()\n  return this.getPublicKey(enc, format)\n}\n\nECDH.prototype.computeSecret = function (other, inenc, enc) {\n  inenc = inenc || 'utf8'\n  if (!Buffer.isBuffer(other)) {\n    other = new Buffer(other, inenc)\n  }\n  var otherPub = this.curve.keyFromPublic(other).getPublic()\n  var out = otherPub.mul(this.keys.getPrivate()).getX()\n  return formatReturnValue(out, enc, this.curveType.byteLength)\n}\n\nECDH.prototype.getPublicKey = function (enc, format) {\n  var key = this.keys.getPublic(format === 'compressed', true)\n  if (format === 'hybrid') {\n    if (key[key.length - 1] % 2) {\n      key[0] = 7\n    } else {\n      key[0] = 6\n    }\n  }\n  return formatReturnValue(key, enc)\n}\n\nECDH.prototype.getPrivateKey = function (enc) {\n  return formatReturnValue(this.keys.getPrivate(), enc)\n}\n\nECDH.prototype.setPublicKey = function (pub, enc) {\n  enc = enc || 'utf8'\n  if (!Buffer.isBuffer(pub)) {\n    pub = new Buffer(pub, enc)\n  }\n  this.keys._importPublic(pub)\n  return this\n}\n\nECDH.prototype.setPrivateKey = function (priv, enc) {\n  enc = enc || 'utf8'\n  if (!Buffer.isBuffer(priv)) {\n    priv = new Buffer(priv, enc)\n  }\n\n  var _priv = new BN(priv)\n  _priv = _priv.toString(16)\n  this.keys = this.curve.genKeyPair()\n  this.keys._importPrivate(_priv)\n  return this\n}\n\nfunction formatReturnValue (bn, enc, len) {\n  if (!Array.isArray(bn)) {\n    bn = bn.toArray()\n  }\n  var buf = new Buffer(bn)\n  if (len && buf.length < len) {\n    var zeros = new Buffer(len - buf.length)\n    zeros.fill(0)\n    buf = Buffer.concat([zeros, buf])\n  }\n  if (!enc) {\n    return buf\n  } else {\n    return buf.toString(enc)\n  }\n}\n","/**\n * @file flash-constants.js\n */\n/**\n * The maximum size in bytes for append operations to the video.js\n * SWF. Calling through to Flash blocks and can be expensive so\n * we chunk data and pass through 4KB at a time, yielding to the\n * browser between chunks. This gives a theoretical maximum rate of\n * 1MB/s into Flash. Any higher and we begin to drop frames and UI\n * responsiveness suffers.\n *\n * @private\n */\n\"use strict\";\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\nvar flashConstants = {\n  // times in milliseconds\n  TIME_BETWEEN_CHUNKS: 1,\n  BYTES_PER_CHUNK: 1024 * 32\n};\n\nexports[\"default\"] = flashConstants;\nmodule.exports = exports[\"default\"];","'use strict';\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar addToUnscopables = require('../internals/add-to-unscopables');\nvar Iterators = require('../internals/iterators');\nvar InternalStateModule = require('../internals/internal-state');\nvar defineIterator = require('../internals/define-iterator');\n\nvar ARRAY_ITERATOR = 'Array Iterator';\nvar setInternalState = InternalStateModule.set;\nvar getInternalState = InternalStateModule.getterFor(ARRAY_ITERATOR);\n\n// `Array.prototype.entries` method\n// https://tc39.es/ecma262/#sec-array.prototype.entries\n// `Array.prototype.keys` method\n// https://tc39.es/ecma262/#sec-array.prototype.keys\n// `Array.prototype.values` method\n// https://tc39.es/ecma262/#sec-array.prototype.values\n// `Array.prototype[@@iterator]` method\n// https://tc39.es/ecma262/#sec-array.prototype-@@iterator\n// `CreateArrayIterator` internal method\n// https://tc39.es/ecma262/#sec-createarrayiterator\nmodule.exports = defineIterator(Array, 'Array', function (iterated, kind) {\n  setInternalState(this, {\n    type: ARRAY_ITERATOR,\n    target: toIndexedObject(iterated), // target\n    index: 0,                          // next index\n    kind: kind                         // kind\n  });\n// `%ArrayIteratorPrototype%.next` method\n// https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next\n}, function () {\n  var state = getInternalState(this);\n  var target = state.target;\n  var kind = state.kind;\n  var index = state.index++;\n  if (!target || index >= target.length) {\n    state.target = undefined;\n    return { value: undefined, done: true };\n  }\n  if (kind == 'keys') return { value: index, done: false };\n  if (kind == 'values') return { value: target[index], done: false };\n  return { value: [index, target[index]], done: false };\n}, 'values');\n\n// argumentsList[@@iterator] is %ArrayProto_values%\n// https://tc39.es/ecma262/#sec-createunmappedargumentsobject\n// https://tc39.es/ecma262/#sec-createmappedargumentsobject\nIterators.Arguments = Iterators.Array;\n\n// https://tc39.es/ecma262/#sec-array.prototype-@@unscopables\naddToUnscopables('keys');\naddToUnscopables('values');\naddToUnscopables('entries');\n","var redefine = require('../internals/redefine');\n\nmodule.exports = function (target, src, options) {\n  for (var key in src) redefine(target, key, src[key], options);\n  return target;\n};\n","import getBoundingClientRect from \"./getBoundingClientRect.js\"; // Returns the layout rect of an element relative to its offsetParent. Layout\n// means it doesn't take into account transforms.\n\nexport default function getLayoutRect(element) {\n  var clientRect = getBoundingClientRect(element); // Use the clientRect sizes if it's not been transformed.\n  // Fixes https://github.com/popperjs/popper-core/issues/1223\n\n  var width = element.offsetWidth;\n  var height = element.offsetHeight;\n\n  if (Math.abs(clientRect.width - width) <= 1) {\n    width = clientRect.width;\n  }\n\n  if (Math.abs(clientRect.height - height) <= 1) {\n    height = clientRect.height;\n  }\n\n  return {\n    x: element.offsetLeft,\n    y: element.offsetTop,\n    width: width,\n    height: height\n  };\n}","exports = module.exports = require('./lib/_stream_readable.js');\nexports.Stream = exports;\nexports.Readable = exports;\nexports.Writable = require('./lib/_stream_writable.js');\nexports.Duplex = require('./lib/_stream_duplex.js');\nexports.Transform = require('./lib/_stream_transform.js');\nexports.PassThrough = require('./lib/_stream_passthrough.js');\n","var toString = {}.toString;\n\nmodule.exports = Array.isArray || function (arr) {\n  return toString.call(arr) == '[object Array]';\n};\n","var $ = require('../internals/export');\nvar fails = require('../internals/fails');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar nativeGetOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar DESCRIPTORS = require('../internals/descriptors');\n\nvar FAILS_ON_PRIMITIVES = fails(function () { nativeGetOwnPropertyDescriptor(1); });\nvar FORCED = !DESCRIPTORS || FAILS_ON_PRIMITIVES;\n\n// `Object.getOwnPropertyDescriptor` method\n// https://tc39.es/ecma262/#sec-object.getownpropertydescriptor\n$({ target: 'Object', stat: true, forced: FORCED, sham: !DESCRIPTORS }, {\n  getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {\n    return nativeGetOwnPropertyDescriptor(toIndexedObject(it), key);\n  }\n});\n","import { max as mathMax, min as mathMin } from \"./math.js\";\nexport function within(min, value, max) {\n  return mathMax(min, mathMin(value, max));\n}\nexport function withinMaxClamp(min, value, max) {\n  var v = within(min, value, max);\n  return v > max ? max : v;\n}","/**\n * @license\n * Video.js 6.13.0 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/master/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/master/LICENSE>\n */\n\nfunction _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }\n\nvar window = _interopDefault(require('global/window'));\nvar document = _interopDefault(require('global/document'));\nvar tsml = _interopDefault(require('tsml'));\nvar safeParseTuple = _interopDefault(require('safe-json-parse/tuple'));\nvar xhr = _interopDefault(require('xhr'));\nvar vtt = _interopDefault(require('videojs-vtt.js'));\n\nvar version = \"6.13.0\";\n\n/**\n * @file browser.js\n * @module browser\n */\nvar USER_AGENT = window.navigator && window.navigator.userAgent || '';\nvar webkitVersionMap = /AppleWebKit\\/([\\d.]+)/i.exec(USER_AGENT);\nvar appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;\n\n/*\n * Device is an iPhone\n *\n * @type {Boolean}\n * @constant\n * @private\n */\nvar IS_IPAD = /iPad/i.test(USER_AGENT);\n\n// The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n// to identify iPhones, we need to exclude iPads.\n// http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\nvar IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\nvar IS_IPOD = /iPod/i.test(USER_AGENT);\nvar IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n\nvar IOS_VERSION = function () {\n  var match = USER_AGENT.match(/OS (\\d+)_/i);\n\n  if (match && match[1]) {\n    return match[1];\n  }\n  return null;\n}();\n\nvar IS_ANDROID = /Android/i.test(USER_AGENT);\nvar ANDROID_VERSION = function () {\n  // This matches Android Major.Minor.Patch versions\n  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n  var match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n\n  if (!match) {\n    return null;\n  }\n\n  var major = match[1] && parseFloat(match[1]);\n  var minor = match[2] && parseFloat(match[2]);\n\n  if (major && minor) {\n    return parseFloat(match[1] + '.' + match[2]);\n  } else if (major) {\n    return major;\n  }\n  return null;\n}();\n\n// Old Android is defined as Version older than 2.3, and requiring a webkit version of the android browser\nvar IS_OLD_ANDROID = IS_ANDROID && /webkit/i.test(USER_AGENT) && ANDROID_VERSION < 2.3;\nvar IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;\n\nvar IS_FIREFOX = /Firefox/i.test(USER_AGENT);\nvar IS_EDGE = /Edge/i.test(USER_AGENT);\nvar IS_CHROME = !IS_EDGE && (/Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT));\nvar CHROME_VERSION = function () {\n  var match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n\n  if (match && match[2]) {\n    return parseFloat(match[2]);\n  }\n  return null;\n}();\nvar IS_IE8 = /MSIE\\s8\\.0/.test(USER_AGENT);\nvar IE_VERSION = function () {\n  var result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n  var version = result && parseFloat(result[1]);\n\n  if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n    // IE 11 has a different user agent string than other IE versions\n    version = 11.0;\n  }\n\n  return version;\n}();\n\nvar IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\nvar IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n\nvar TOUCH_ENABLED = isReal() && ('ontouchstart' in window || window.navigator.maxTouchPoints || window.DocumentTouch && window.document instanceof window.DocumentTouch);\n\nvar BACKGROUND_SIZE_SUPPORTED = isReal() && 'backgroundSize' in window.document.createElement('video').style;\n\nvar browser = (Object.freeze || Object)({\n\tIS_IPAD: IS_IPAD,\n\tIS_IPHONE: IS_IPHONE,\n\tIS_IPOD: IS_IPOD,\n\tIS_IOS: IS_IOS,\n\tIOS_VERSION: IOS_VERSION,\n\tIS_ANDROID: IS_ANDROID,\n\tANDROID_VERSION: ANDROID_VERSION,\n\tIS_OLD_ANDROID: IS_OLD_ANDROID,\n\tIS_NATIVE_ANDROID: IS_NATIVE_ANDROID,\n\tIS_FIREFOX: IS_FIREFOX,\n\tIS_EDGE: IS_EDGE,\n\tIS_CHROME: IS_CHROME,\n\tCHROME_VERSION: CHROME_VERSION,\n\tIS_IE8: IS_IE8,\n\tIE_VERSION: IE_VERSION,\n\tIS_SAFARI: IS_SAFARI,\n\tIS_ANY_SAFARI: IS_ANY_SAFARI,\n\tTOUCH_ENABLED: TOUCH_ENABLED,\n\tBACKGROUND_SIZE_SUPPORTED: BACKGROUND_SIZE_SUPPORTED\n});\n\nvar _typeof = typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\" ? function (obj) {\n  return typeof obj;\n} : function (obj) {\n  return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar classCallCheck = function (instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\n\n\n\n\n\n\n\n\n\n\n\nvar inherits = function (subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar possibleConstructorReturn = function (self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar taggedTemplateLiteralLoose = function (strings, raw) {\n  strings.raw = raw;\n  return strings;\n};\n\n/**\n * @file obj.js\n * @module obj\n */\n\n/**\n * @callback obj:EachCallback\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n */\n\n/**\n * @callback obj:ReduceCallback\n *\n * @param {Mixed} accum\n *        The value that is accumulating over the reduce loop.\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n *\n * @return {Mixed}\n *         The new accumulated value.\n */\nvar toString = Object.prototype.toString;\n\n/**\n * Get the keys of an Object\n *\n * @param {Object}\n *        The Object to get the keys from\n *\n * @return {string[]}\n *         An array of the keys from the object. Returns an empty array if the\n *         object passed in was invalid or had no keys.\n *\n * @private\n */\nvar keys = function keys(object) {\n  return isObject(object) ? Object.keys(object) : [];\n};\n\n/**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n *        The object to iterate over\n *\n * @param {obj:EachCallback} fn\n *        The callback function which is called for each key in the object.\n */\nfunction each(object, fn) {\n  keys(object).forEach(function (key) {\n    return fn(object[key], key);\n  });\n}\n\n/**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n *        The Object that you want to reduce.\n *\n * @param {Function} fn\n *         A callback function which is called for each key in the object. It\n *         receives the accumulated value and the per-iteration value and key\n *         as arguments.\n *\n * @param {Mixed} [initial = 0]\n *        Starting value\n *\n * @return {Mixed}\n *         The final accumulated value.\n */\nfunction reduce(object, fn) {\n  var initial = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;\n\n  return keys(object).reduce(function (accum, key) {\n    return fn(accum, object[key], key);\n  }, initial);\n}\n\n/**\n * Object.assign-style object shallow merge/extend.\n *\n * @param  {Object} target\n * @param  {Object} ...sources\n * @return {Object}\n */\nfunction assign(target) {\n  for (var _len = arguments.length, sources = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n    sources[_key - 1] = arguments[_key];\n  }\n\n  if (Object.assign) {\n    return Object.assign.apply(Object, [target].concat(sources));\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      target[key] = value;\n    });\n  });\n\n  return target;\n}\n\n/**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param  {Object} value\n * @return {Boolean}\n */\nfunction isObject(value) {\n  return !!value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object';\n}\n\n/**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param  {Object} value\n * @return {Boolean}\n */\nfunction isPlain(value) {\n  return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;\n}\n\n/**\n * @file create-logger.js\n * @module create-logger\n */\n// This is the private tracking variable for the logging history.\nvar history = [];\n\n/**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param  {string} type\n *         The name of the console method to use.\n *\n * @param  {Array} args\n *         The arguments to be passed to the matching console method.\n */\nvar LogByTypeFactory = function LogByTypeFactory(name, log) {\n  return function (type, level, args, stringify) {\n    var lvl = log.levels[level];\n    var lvlRegExp = new RegExp('^(' + lvl + ')$');\n\n    if (type !== 'log') {\n\n      // Add the type to the front of the message when it's not \"log\".\n      args.unshift(type.toUpperCase() + ':');\n    }\n\n    // Add console prefix after adding to history.\n    args.unshift(name + ':');\n\n    // Add a clone of the args at this point to history.\n    if (history) {\n      history.push([].concat(args));\n    }\n\n    // If there's no console then don't try to output messages, but they will\n    // still be stored in history.\n    if (!window.console) {\n      return;\n    }\n\n    // Was setting these once outside of this function, but containing them\n    // in the function makes it easier to test cases where console doesn't exist\n    // when the module is executed.\n    var fn = window.console[type];\n\n    if (!fn && type === 'debug') {\n      // Certain browsers don't have support for console.debug. For those, we\n      // should default to the closest comparable log.\n      fn = window.console.info || window.console.log;\n    }\n\n    // Bail out if there's no console or if this type is not allowed by the\n    // current logging level.\n    if (!fn || !lvl || !lvlRegExp.test(type)) {\n      return;\n    }\n\n    // IEs previous to 11 log objects uselessly as \"[object Object]\"; so, JSONify\n    // objects and arrays for those less-capable browsers.\n    if (stringify) {\n      args = args.map(function (a) {\n        if (isObject(a) || Array.isArray(a)) {\n          try {\n            return JSON.stringify(a);\n          } catch (x) {\n            return String(a);\n          }\n        }\n\n        // Cast to string before joining, so we get null and undefined explicitly\n        // included in output (as we would in a modern console).\n        return String(a);\n      }).join(' ');\n    }\n\n    // Old IE versions do not allow .apply() for console methods (they are\n    // reported as objects rather than functions).\n    if (!fn.apply) {\n      fn(args);\n    } else {\n      fn[Array.isArray(args) ? 'apply' : 'call'](window.console, args);\n    }\n  };\n};\n\nfunction createLogger$1(name) {\n  // This is the private tracking variable for logging level.\n  var level = 'info';\n\n  // the curried logByType bound to the specific log and history\n  var logByType = void 0;\n\n  /**\n   * Logs plain debug messages. Similar to `console.log`.\n   *\n   * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n   * of our JSDoc template, we cannot properly document this as both a function\n   * and a namespace, so its function signature is documented here.\n   *\n   * #### Arguments\n   * ##### *args\n   * Mixed[]\n   *\n   * Any combination of values that could be passed to `console.log()`.\n   *\n   * #### Return Value\n   *\n   * `undefined`\n   *\n   * @namespace\n   * @param    {Mixed[]} args\n   *           One or more messages or objects that should be logged.\n   */\n  var log = function log() {\n    var stringify = log.stringify || IE_VERSION && IE_VERSION < 11;\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    logByType('log', level, args, stringify);\n  };\n\n  // This is the logByType helper that the logging methods below use\n  logByType = LogByTypeFactory(name, log);\n\n  /**\n   * Create a new sublogger which chains the old name to the new name.\n   *\n   * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n   * ```js\n   *  mylogger('foo');\n   *  // > VIDEOJS: player: foo\n   * ```\n   *\n   * @param {string} name\n   *        The name to add call the new logger\n   * @return {Object}\n   */\n  log.createLogger = function (subname) {\n    return createLogger$1(name + ': ' + subname);\n  };\n\n  /**\n   * Enumeration of available logging levels, where the keys are the level names\n   * and the values are `|`-separated strings containing logging methods allowed\n   * in that logging level. These strings are used to create a regular expression\n   * matching the function name being called.\n   *\n   * Levels provided by Video.js are:\n   *\n   * - `off`: Matches no calls. Any value that can be cast to `false` will have\n   *   this effect. The most restrictive.\n   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n   *   `log.warn`, and `log.error`).\n   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n   * - `warn`: Matches `log.warn` and `log.error` calls.\n   * - `error`: Matches only `log.error` calls.\n   *\n   * @type {Object}\n   */\n  log.levels = {\n    all: 'debug|log|warn|error',\n    off: '',\n    debug: 'debug|log|warn|error',\n    info: 'log|warn|error',\n    warn: 'warn|error',\n    error: 'error',\n    DEFAULT: level\n  };\n\n  /**\n   * Get or set the current logging level.\n   *\n   * If a string matching a key from {@link module:log.levels} is provided, acts\n   * as a setter.\n   *\n   * @param  {string} [lvl]\n   *         Pass a valid level to set a new logging level.\n   *\n   * @return {string}\n   *         The current logging level.\n   */\n  log.level = function (lvl) {\n    if (typeof lvl === 'string') {\n      if (!log.levels.hasOwnProperty(lvl)) {\n        throw new Error('\"' + lvl + '\" in not a valid log level');\n      }\n      level = lvl;\n    }\n    return level;\n  };\n\n  /**\n   * Returns an array containing everything that has been logged to the history.\n   *\n   * This array is a shallow clone of the internal history record. However, its\n   * contents are _not_ cloned; so, mutating objects inside this array will\n   * mutate them in history.\n   *\n   * @return {Array}\n   */\n  log.history = function () {\n    return history ? [].concat(history) : [];\n  };\n\n  /**\n   * Allows you to filter the history by the given logger name\n   *\n   * @param {string} fname\n   *        The name to filter by\n   *\n   * @return {Array}\n   *         The filtered list to return\n   */\n  log.history.filter = function (fname) {\n    return (history || []).filter(function (historyItem) {\n      // if the first item in each historyItem includes `fname`, then it's a match\n      return new RegExp('.*' + fname + '.*').test(historyItem[0]);\n    });\n  };\n\n  /**\n   * Clears the internal history tracking, but does not prevent further history\n   * tracking.\n   */\n  log.history.clear = function () {\n    if (history) {\n      history.length = 0;\n    }\n  };\n\n  /**\n   * Disable history tracking if it is currently enabled.\n   */\n  log.history.disable = function () {\n    if (history !== null) {\n      history.length = 0;\n      history = null;\n    }\n  };\n\n  /**\n   * Enable history tracking if it is currently disabled.\n   */\n  log.history.enable = function () {\n    if (history === null) {\n      history = [];\n    }\n  };\n\n  /**\n   * Logs error messages. Similar to `console.error`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as an error\n   */\n  log.error = function () {\n    for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    return logByType('error', level, args);\n  };\n\n  /**\n   * Logs warning messages. Similar to `console.warn`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as a warning.\n   */\n  log.warn = function () {\n    for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    return logByType('warn', level, args);\n  };\n\n  /**\n   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n   * log if `console.debug` is not available\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as debug.\n   */\n  log.debug = function () {\n    for (var _len4 = arguments.length, args = Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    return logByType('debug', level, args);\n  };\n\n  return log;\n}\n\n/**\n * @file log.js\n * @module log\n */\nvar log = createLogger$1('VIDEOJS');\nvar createLogger = log.createLogger;\n\n/**\n * @file computed-style.js\n * @module computed-style\n */\n/**\n * A safe getComputedStyle with an IE8 fallback.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a null-check to\n * make sure  that the player doesn't break in these cases.\n *\n * @param {Element} el\n *        The element you want the computed style of\n *\n * @param {string} prop\n *        The property name you want\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n *\n * @static\n * @const\n */\nfunction computedStyle(el, prop) {\n  if (!el || !prop) {\n    return '';\n  }\n\n  if (typeof window.getComputedStyle === 'function') {\n    var cs = window.getComputedStyle(el);\n\n    return cs ? cs[prop] : '';\n  }\n\n  return el.currentStyle[prop] || '';\n}\n\nvar _templateObject = taggedTemplateLiteralLoose(['Setting attributes in the second argument of createEl()\\n                has been deprecated. Use the third argument instead.\\n                createEl(type, properties, attributes). Attempting to set ', ' to ', '.'], ['Setting attributes in the second argument of createEl()\\n                has been deprecated. Use the third argument instead.\\n                createEl(type, properties, attributes). Attempting to set ', ' to ', '.']);\n\n/**\n * @file dom.js\n * @module dom\n */\n/**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @param {string} str\n *        The string to check\n *\n * @return {boolean}\n *         - True if the string is non-blank\n *         - False otherwise\n *\n */\nfunction isNonBlankString(str) {\n  return typeof str === 'string' && /\\S/.test(str);\n}\n\n/**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @param {string} str\n *         The string to check for whitespace.\n *\n * @throws {Error}\n *         Throws an error if there is whitespace in the string.\n *\n */\nfunction throwIfWhitespace(str) {\n  if (/\\s/.test(str)) {\n    throw new Error('class has illegal whitespace characters');\n  }\n}\n\n/**\n * Produce a regular expression for matching a className within an elements className.\n *\n * @param {string} className\n *         The className to generate the RegExp for.\n *\n * @return {RegExp}\n *         The RegExp that will check for a specific `className` in an elements\n *         className.\n */\nfunction classRegExp(className) {\n  return new RegExp('(^|\\\\s)' + className + '($|\\\\s)');\n}\n\n/**\n * Whether the current DOM interface appears to be real.\n *\n * @return {Boolean}\n */\nfunction isReal() {\n  return (\n\n    // Both document and window will never be undefined thanks to `global`.\n    document === window.document &&\n\n    // In IE < 9, DOM methods return \"object\" as their type, so all we can\n    // confidently check is that it exists.\n    typeof document.createElement !== 'undefined'\n  );\n}\n\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param {Mixed} value\n *        The thing to check\n *\n * @return {boolean}\n *         - True if it is a DOM element\n *         - False otherwise\n */\nfunction isEl(value) {\n  return isObject(value) && value.nodeType === 1;\n}\n\n/**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n *\n */\nfunction isInFrame() {\n\n  // We need a try/catch here because Safari will throw errors when attempting\n  // to get either `parent` or `self`\n  try {\n    return window.parent !== window.self;\n  } catch (x) {\n    return true;\n  }\n}\n\n/**\n * Creates functions to query the DOM using a given method.\n *\n * @param {string} method\n *         The method to create the query with.\n *\n * @return {Function}\n *         The query method\n */\nfunction createQuerier(method) {\n  return function (selector, context) {\n    if (!isNonBlankString(selector)) {\n      return document[method](null);\n    }\n    if (isNonBlankString(context)) {\n      context = document.querySelector(context);\n    }\n\n    var ctx = isEl(context) ? context : document;\n\n    return ctx[method] && ctx[method](selector);\n  };\n}\n\n/**\n * Creates an element and applies properties.\n *\n * @param {string} [tagName='div']\n *         Name of tag to be created.\n *\n * @param {Object} [properties={}]\n *         Element properties to be applied.\n *\n * @param {Object} [attributes={}]\n *         Element attributes to be applied.\n *\n * @param {String|Element|TextNode|Array|Function} [content]\n *         Contents for the element (see: {@link dom:normalizeContent})\n *\n * @return {Element}\n *         The element that was created.\n */\nfunction createEl() {\n  var tagName = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'div';\n  var properties = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n  var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n  var content = arguments[3];\n\n  var el = document.createElement(tagName);\n\n  Object.getOwnPropertyNames(properties).forEach(function (propName) {\n    var val = properties[propName];\n\n    // See #2176\n    // We originally were accepting both properties and attributes in the\n    // same object, but that doesn't work so well.\n    if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {\n      log.warn(tsml(_templateObject, propName, val));\n      el.setAttribute(propName, val);\n\n      // Handle textContent since it's not supported everywhere and we have a\n      // method for it.\n    } else if (propName === 'textContent') {\n      textContent(el, val);\n    } else {\n      el[propName] = val;\n    }\n  });\n\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    el.setAttribute(attrName, attributes[attrName]);\n  });\n\n  if (content) {\n    appendContent(el, content);\n  }\n\n  return el;\n}\n\n/**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param {Element} el\n *        The element to add text content into\n *\n * @param {string} text\n *        The text content to add.\n *\n * @return {Element}\n *         The element with added text content.\n */\nfunction textContent(el, text) {\n  if (typeof el.textContent === 'undefined') {\n    el.innerText = text;\n  } else {\n    el.textContent = text;\n  }\n  return el;\n}\n\n/**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n *        Element to insert\n *\n * @param {Element} parent\n *        Element to insert child into\n */\nfunction prependTo(child, parent) {\n  if (parent.firstChild) {\n    parent.insertBefore(child, parent.firstChild);\n  } else {\n    parent.appendChild(child);\n  }\n}\n\n/**\n * Check if an element has a CSS class\n *\n * @param {Element} element\n *        Element to check\n *\n * @param {string} classToCheck\n *        Class name to check for\n *\n * @return {boolean}\n *         - True if the element had the class\n *         - False otherwise.\n *\n * @throws {Error}\n *         Throws an error if `classToCheck` has white space.\n */\nfunction hasClass(element, classToCheck) {\n  throwIfWhitespace(classToCheck);\n  if (element.classList) {\n    return element.classList.contains(classToCheck);\n  }\n  return classRegExp(classToCheck).test(element.className);\n}\n\n/**\n * Add a CSS class name to an element\n *\n * @param {Element} element\n *        Element to add class name to.\n *\n * @param {string} classToAdd\n *        Class name to add.\n *\n * @return {Element}\n *         The dom element with the added class name.\n */\nfunction addClass(element, classToAdd) {\n  if (element.classList) {\n    element.classList.add(classToAdd);\n\n    // Don't need to `throwIfWhitespace` here because `hasElClass` will do it\n    // in the case of classList not being supported.\n  } else if (!hasClass(element, classToAdd)) {\n    element.className = (element.className + ' ' + classToAdd).trim();\n  }\n\n  return element;\n}\n\n/**\n * Remove a CSS class name from an element\n *\n * @param {Element} element\n *        Element to remove a class name from.\n *\n * @param {string} classToRemove\n *        Class name to remove\n *\n * @return {Element}\n *         The dom element with class name removed.\n */\nfunction removeClass(element, classToRemove) {\n  if (element.classList) {\n    element.classList.remove(classToRemove);\n  } else {\n    throwIfWhitespace(classToRemove);\n    element.className = element.className.split(/\\s+/).filter(function (c) {\n      return c !== classToRemove;\n    }).join(' ');\n  }\n\n  return element;\n}\n\n/**\n * The callback definition for toggleElClass.\n *\n * @callback Dom~PredicateCallback\n * @param {Element} element\n *        The DOM element of the Component.\n *\n * @param {string} classToToggle\n *        The `className` that wants to be toggled\n *\n * @return {boolean|undefined}\n *         - If true the `classToToggle` will get added to `element`.\n *         - If false the `classToToggle` will get removed from `element`.\n *         - If undefined this callback will be ignored\n */\n\n/**\n * Adds or removes a CSS class name on an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param {Element} element\n *        The element to toggle a class name on.\n *\n * @param {string} classToToggle\n *        The class that should be toggled\n *\n * @param {boolean|PredicateCallback} [predicate]\n *        See the return value for {@link Dom~PredicateCallback}\n *\n * @return {Element}\n *         The element with a class that has been toggled.\n */\nfunction toggleClass(element, classToToggle, predicate) {\n\n  // This CANNOT use `classList` internally because IE does not support the\n  // second parameter to the `classList.toggle()` method! Which is fine because\n  // `classList` will be used by the add/remove functions.\n  var has = hasClass(element, classToToggle);\n\n  if (typeof predicate === 'function') {\n    predicate = predicate(element, classToToggle);\n  }\n\n  if (typeof predicate !== 'boolean') {\n    predicate = !has;\n  }\n\n  // If the necessary class operation matches the current state of the\n  // element, no action is required.\n  if (predicate === has) {\n    return;\n  }\n\n  if (predicate) {\n    addClass(element, classToToggle);\n  } else {\n    removeClass(element, classToToggle);\n  }\n\n  return element;\n}\n\n/**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n *        Element to add attributes to.\n *\n * @param {Object} [attributes]\n *        Attributes to be applied.\n */\nfunction setAttributes(el, attributes) {\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    var attrValue = attributes[attrName];\n\n    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n      el.removeAttribute(attrName);\n    } else {\n      el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n    }\n  });\n}\n\n/**\n * Get an element's attribute values, as defined on the HTML tag\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute (which shouldn't be used with HTML)\n * This will return true or false for boolean attributes.\n *\n * @param {Element} tag\n *        Element from which to get tag attributes.\n *\n * @return {Object}\n *         All attributes of the element.\n */\nfunction getAttributes(tag) {\n  var obj = {};\n\n  // known boolean attributes\n  // we can check for matching boolean properties, but older browsers\n  // won't know about HTML5 boolean attributes that we still read from\n  var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n\n  if (tag && tag.attributes && tag.attributes.length > 0) {\n    var attrs = tag.attributes;\n\n    for (var i = attrs.length - 1; i >= 0; i--) {\n      var attrName = attrs[i].name;\n      var attrVal = attrs[i].value;\n\n      // check for known booleans\n      // the matching element property will return a value for typeof\n      if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n        // the value of an included boolean attribute is typically an empty\n        // string ('') which would equal false if we just check for a false value.\n        // we also don't want support bad code like autoplay='false'\n        attrVal = attrVal !== null ? true : false;\n      }\n\n      obj[attrName] = attrVal;\n    }\n  }\n\n  return obj;\n}\n\n/**\n * Get the value of an element's attribute\n *\n * @param {Element} el\n *        A DOM element\n *\n * @param {string} attribute\n *        Attribute to get the value of\n *\n * @return {string}\n *         value of the attribute\n */\nfunction getAttribute(el, attribute) {\n  return el.getAttribute(attribute);\n}\n\n/**\n * Set the value of an element's attribute\n *\n * @param {Element} el\n *        A DOM element\n *\n * @param {string} attribute\n *        Attribute to set\n *\n * @param {string} value\n *        Value to set the attribute to\n */\nfunction setAttribute(el, attribute, value) {\n  el.setAttribute(attribute, value);\n}\n\n/**\n * Remove an element's attribute\n *\n * @param {Element} el\n *        A DOM element\n *\n * @param {string} attribute\n *        Attribute to remove\n */\nfunction removeAttribute(el, attribute) {\n  el.removeAttribute(attribute);\n}\n\n/**\n * Attempt to block the ability to select text while dragging controls\n */\nfunction blockTextSelection() {\n  document.body.focus();\n  document.onselectstart = function () {\n    return false;\n  };\n}\n\n/**\n * Turn off text selection blocking\n */\nfunction unblockTextSelection() {\n  document.onselectstart = function () {\n    return true;\n  };\n}\n\n/**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param  {Element} el\n *         Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n *         Always returns a plain\n */\nfunction getBoundingClientRect(el) {\n  if (el && el.getBoundingClientRect && el.parentNode) {\n    var rect = el.getBoundingClientRect();\n    var result = {};\n\n    ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {\n      if (rect[k] !== undefined) {\n        result[k] = rect[k];\n      }\n    });\n\n    if (!result.height) {\n      result.height = parseFloat(computedStyle(el, 'height'));\n    }\n\n    if (!result.width) {\n      result.width = parseFloat(computedStyle(el, 'width'));\n    }\n\n    return result;\n  }\n}\n\n/**\n * The postion of a DOM element on the page.\n *\n * @typedef {Object} module:dom~Position\n *\n * @property {number} left\n *           Pixels to the left\n *\n * @property {number} top\n *           Pixels on top\n */\n\n/**\n * Offset Left.\n * getBoundingClientRect technique from\n * John Resig\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param {Element} el\n *        Element from which to get offset\n *\n * @return {module:dom~Position}\n *         The position of the element that was passed in.\n */\nfunction findPosition(el) {\n  var box = void 0;\n\n  if (el.getBoundingClientRect && el.parentNode) {\n    box = el.getBoundingClientRect();\n  }\n\n  if (!box) {\n    return {\n      left: 0,\n      top: 0\n    };\n  }\n\n  var docEl = document.documentElement;\n  var body = document.body;\n\n  var clientLeft = docEl.clientLeft || body.clientLeft || 0;\n  var scrollLeft = window.pageXOffset || body.scrollLeft;\n  var left = box.left + scrollLeft - clientLeft;\n\n  var clientTop = docEl.clientTop || body.clientTop || 0;\n  var scrollTop = window.pageYOffset || body.scrollTop;\n  var top = box.top + scrollTop - clientTop;\n\n  // Android sometimes returns slightly off decimal values, so need to round\n  return {\n    left: Math.round(left),\n    top: Math.round(top)\n  };\n}\n\n/**\n * x and y coordinates for a dom element or mouse pointer\n *\n * @typedef {Object} Dom~Coordinates\n *\n * @property {number} x\n *           x coordinate in pixels\n *\n * @property {number} y\n *           y coordinate in pixels\n */\n\n/**\n * Get pointer position in element\n * Returns an object with x and y coordinates.\n * The base on the coordinates are the bottom left of the element.\n *\n * @param {Element} el\n *        Element on which to get the pointer position on\n *\n * @param {EventTarget~Event} event\n *        Event object\n *\n * @return {Dom~Coordinates}\n *         A Coordinates object corresponding to the mouse position.\n *\n */\nfunction getPointerPosition(el, event) {\n  var position = {};\n  var box = findPosition(el);\n  var boxW = el.offsetWidth;\n  var boxH = el.offsetHeight;\n\n  var boxY = box.top;\n  var boxX = box.left;\n  var pageY = event.pageY;\n  var pageX = event.pageX;\n\n  if (event.changedTouches) {\n    pageX = event.changedTouches[0].pageX;\n    pageY = event.changedTouches[0].pageY;\n  }\n\n  position.y = Math.max(0, Math.min(1, (boxY - pageY + boxH) / boxH));\n  position.x = Math.max(0, Math.min(1, (pageX - boxX) / boxW));\n\n  return position;\n}\n\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param {Mixed} value\n *        Check if this value is a text node.\n *\n * @return {boolean}\n *         - True if it is a text node\n *         - False otherwise\n */\nfunction isTextNode(value) {\n  return isObject(value) && value.nodeType === 3;\n}\n\n/**\n * Empties the contents of an element.\n *\n * @param {Element} el\n *        The element to empty children from\n *\n * @return {Element}\n *         The element with no children\n */\nfunction emptyEl(el) {\n  while (el.firstChild) {\n    el.removeChild(el.firstChild);\n  }\n  return el;\n}\n\n/**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but protects\n * from falling into the trap of simply writing to `innerHTML`, which is\n * an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {String|Element|TextNode|Array|Function} content\n *        - String: Normalized into a text node.\n *        - Element/TextNode: Passed through.\n *        - Array: A one-dimensional array of strings, elements, nodes, or functions\n *          (which return single strings, elements, or nodes).\n *        - Function: If the sole argument, is expected to produce a string, element,\n *          node, or array as defined above.\n *\n * @return {Array}\n *         All of the content that was passed in normalized.\n */\nfunction normalizeContent(content) {\n\n  // First, invoke content if it is a function. If it produces an array,\n  // that needs to happen before normalization.\n  if (typeof content === 'function') {\n    content = content();\n  }\n\n  // Next up, normalize to an array, so one or many items can be normalized,\n  // filtered, and returned.\n  return (Array.isArray(content) ? content : [content]).map(function (value) {\n\n    // First, invoke value if it is a function to produce a new value,\n    // which will be subsequently normalized to a Node of some kind.\n    if (typeof value === 'function') {\n      value = value();\n    }\n\n    if (isEl(value) || isTextNode(value)) {\n      return value;\n    }\n\n    if (typeof value === 'string' && /\\S/.test(value)) {\n      return document.createTextNode(value);\n    }\n  }).filter(function (value) {\n    return value;\n  });\n}\n\n/**\n * Normalizes and appends content to an element.\n *\n * @param {Element} el\n *        Element to append normalized content to.\n *\n *\n * @param {String|Element|TextNode|Array|Function} content\n *        See the `content` argument of {@link dom:normalizeContent}\n *\n * @return {Element}\n *         The element with appended normalized content.\n */\nfunction appendContent(el, content) {\n  normalizeContent(content).forEach(function (node) {\n    return el.appendChild(node);\n  });\n  return el;\n}\n\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n *        Element to insert normalized content into.\n *\n * @param {String|Element|TextNode|Array|Function} content\n *        See the `content` argument of {@link dom:normalizeContent}\n *\n * @return {Element}\n *         The element with inserted normalized content.\n *\n */\nfunction insertContent(el, content) {\n  return appendContent(emptyEl(el), content);\n}\n\n/**\n * Check if event was a single left click\n *\n * @param {EventTarget~Event} event\n *        Event object\n *\n * @return {boolean}\n *         - True if a left click\n *         - False if not a left click\n */\nfunction isSingleLeftClick(event) {\n  // Note: if you create something draggable, be sure to\n  // call it on both `mousedown` and `mousemove` event,\n  // otherwise `mousedown` should be enough for a button\n\n  if (event.button === undefined && event.buttons === undefined) {\n    // Why do we need `buttons` ?\n    // Because, middle mouse sometimes have this:\n    // e.button === 0 and e.buttons === 4\n    // Furthermore, we want to prevent combination click, something like\n    // HOLD middlemouse then left click, that would be\n    // e.button === 0, e.buttons === 5\n    // just `button` is not gonna work\n\n    // Alright, then what this block does ?\n    // this is for chrome `simulate mobile devices`\n    // I want to support this as well\n\n    return true;\n  }\n\n  if (event.button === 0 && event.buttons === undefined) {\n    // Touch screen, sometimes on some specific device, `buttons`\n    // doesn't have anything (safari on ios, blackberry...)\n\n    return true;\n  }\n\n  if (IE_VERSION === 9) {\n    // Ignore IE9\n\n    return true;\n  }\n\n  if (event.button !== 0 || event.buttons !== 1) {\n    // This is the reason we have those if else block above\n    // if any special case we can catch and let it slide\n    // we do it above, when get to here, this definitely\n    // is-not-left-click\n\n    return false;\n  }\n\n  return true;\n}\n\n/**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param {string} selector\n *        A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param {Element|String} [context=document]\n *        A DOM element within which to query. Can also be a selector\n *        string in which case the first matching element will be used\n *        as context. If missing (or no element matches selector), falls\n *        back to `document`.\n *\n * @return {Element|null}\n *         The element that was found or null.\n */\nvar $ = createQuerier('querySelector');\n\n/**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param {string} selector\n *           A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param {Element|String} [context=document]\n *           A DOM element within which to query. Can also be a selector\n *           string in which case the first matching element will be used\n *           as context. If missing (or no element matches selector), falls\n *           back to `document`.\n *\n * @return {NodeList}\n *         A element list of elements that were found. Will be empty if none were found.\n *\n */\nvar $$ = createQuerier('querySelectorAll');\n\n\n\nvar Dom = (Object.freeze || Object)({\n\tisReal: isReal,\n\tisEl: isEl,\n\tisInFrame: isInFrame,\n\tcreateEl: createEl,\n\ttextContent: textContent,\n\tprependTo: prependTo,\n\thasClass: hasClass,\n\taddClass: addClass,\n\tremoveClass: removeClass,\n\ttoggleClass: toggleClass,\n\tsetAttributes: setAttributes,\n\tgetAttributes: getAttributes,\n\tgetAttribute: getAttribute,\n\tsetAttribute: setAttribute,\n\tremoveAttribute: removeAttribute,\n\tblockTextSelection: blockTextSelection,\n\tunblockTextSelection: unblockTextSelection,\n\tgetBoundingClientRect: getBoundingClientRect,\n\tfindPosition: findPosition,\n\tgetPointerPosition: getPointerPosition,\n\tisTextNode: isTextNode,\n\temptyEl: emptyEl,\n\tnormalizeContent: normalizeContent,\n\tappendContent: appendContent,\n\tinsertContent: insertContent,\n\tisSingleLeftClick: isSingleLeftClick,\n\t$: $,\n\t$$: $$\n});\n\n/**\n * @file guid.js\n * @module guid\n */\n\n/**\n * Unique ID for an element or function\n * @type {Number}\n */\nvar _guid = 1;\n\n/**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n *         A new unique ID.\n */\nfunction newGUID() {\n  return _guid++;\n}\n\n/**\n * @file dom-data.js\n * @module dom-data\n */\n/**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\nvar elData = {};\n\n/*\n * Unique attribute name to store an element's guid in\n *\n * @type {String}\n * @constant\n * @private\n */\nvar elIdAttr = 'vdata' + new Date().getTime();\n\n/**\n * Returns the cache object where data for an element is stored\n *\n * @param {Element} el\n *        Element to store data for.\n *\n * @return {Object}\n *         The cache object for that el that was passed in.\n */\nfunction getData(el) {\n  var id = el[elIdAttr];\n\n  if (!id) {\n    id = el[elIdAttr] = newGUID();\n  }\n\n  if (!elData[id]) {\n    elData[id] = {};\n  }\n\n  return elData[id];\n}\n\n/**\n * Returns whether or not an element has cached data\n *\n * @param {Element} el\n *        Check if this element has cached data.\n *\n * @return {boolean}\n *         - True if the DOM element has cached data.\n *         - False otherwise.\n */\nfunction hasData(el) {\n  var id = el[elIdAttr];\n\n  if (!id) {\n    return false;\n  }\n\n  return !!Object.getOwnPropertyNames(elData[id]).length;\n}\n\n/**\n * Delete data for the element from the cache and the guid attr from getElementById\n *\n * @param {Element} el\n *        Remove cached data for this element.\n */\nfunction removeData(el) {\n  var id = el[elIdAttr];\n\n  if (!id) {\n    return;\n  }\n\n  // Remove all stored data\n  delete elData[id];\n\n  // Remove the elIdAttr property from the DOM node\n  try {\n    delete el[elIdAttr];\n  } catch (e) {\n    if (el.removeAttribute) {\n      el.removeAttribute(elIdAttr);\n    } else {\n      // IE doesn't appear to support removeAttribute on the document element\n      el[elIdAttr] = null;\n    }\n  }\n}\n\n/**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @module events\n */\n\n/**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n *        Element to clean up\n *\n * @param {string} type\n *        Type of event to clean up\n */\nfunction _cleanUpEvents(elem, type) {\n  var data = getData(elem);\n\n  // Remove the events of a particular type if there are none left\n  if (data.handlers[type].length === 0) {\n    delete data.handlers[type];\n    // data.handlers[type] = null;\n    // Setting to null was causing an error with data.handlers\n\n    // Remove the meta-handler from the element\n    if (elem.removeEventListener) {\n      elem.removeEventListener(type, data.dispatcher, false);\n    } else if (elem.detachEvent) {\n      elem.detachEvent('on' + type, data.dispatcher);\n    }\n  }\n\n  // Remove the events object if there are no types left\n  if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n    delete data.handlers;\n    delete data.dispatcher;\n    delete data.disabled;\n  }\n\n  // Finally remove the element data if there is no data left\n  if (Object.getOwnPropertyNames(data).length === 0) {\n    removeData(elem);\n  }\n}\n\n/**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n *        The event method we want to use.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} callback\n *        Event listener.\n */\nfunction _handleMultipleEvents(fn, elem, types, callback) {\n  types.forEach(function (type) {\n    // Call the event method for each one of the types\n    fn(elem, type, callback);\n  });\n}\n\n/**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n *        Event object to fix.\n *\n * @return {Object}\n *         Fixed event object.\n */\nfunction fixEvent(event) {\n\n  function returnTrue() {\n    return true;\n  }\n\n  function returnFalse() {\n    return false;\n  }\n\n  // Test if fixing up is needed\n  // Used to check if !event.stopPropagation instead of isPropagationStopped\n  // But native events return true for stopPropagation, but don't have\n  // other expected methods like isPropagationStopped. Seems to be a problem\n  // with the Javascript Ninja code. So we're just overriding all events now.\n  if (!event || !event.isPropagationStopped) {\n    var old = event || window.event;\n\n    event = {};\n    // Clone the old object so that we can modify the values event = {};\n    // IE8 Doesn't like when you mess with native event properties\n    // Firefox returns false for event.hasOwnProperty('type') and other props\n    //  which makes copying more difficult.\n    // TODO: Probably best to create a whitelist of event props\n    for (var key in old) {\n      // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n      // and webkitMovementX/Y\n      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY') {\n        // Chrome 32+ warns if you try to copy deprecated returnValue, but\n        // we still want to if preventDefault isn't supported (IE8).\n        if (!(key === 'returnValue' && old.preventDefault)) {\n          event[key] = old[key];\n        }\n      }\n    }\n\n    // The event occurred on this element\n    if (!event.target) {\n      event.target = event.srcElement || document;\n    }\n\n    // Handle which other element the event is related to\n    if (!event.relatedTarget) {\n      event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n    }\n\n    // Stop the default browser action\n    event.preventDefault = function () {\n      if (old.preventDefault) {\n        old.preventDefault();\n      }\n      event.returnValue = false;\n      old.returnValue = false;\n      event.defaultPrevented = true;\n    };\n\n    event.defaultPrevented = false;\n\n    // Stop the event from bubbling\n    event.stopPropagation = function () {\n      if (old.stopPropagation) {\n        old.stopPropagation();\n      }\n      event.cancelBubble = true;\n      old.cancelBubble = true;\n      event.isPropagationStopped = returnTrue;\n    };\n\n    event.isPropagationStopped = returnFalse;\n\n    // Stop the event from bubbling and executing other handlers\n    event.stopImmediatePropagation = function () {\n      if (old.stopImmediatePropagation) {\n        old.stopImmediatePropagation();\n      }\n      event.isImmediatePropagationStopped = returnTrue;\n      event.stopPropagation();\n    };\n\n    event.isImmediatePropagationStopped = returnFalse;\n\n    // Handle mouse position\n    if (event.clientX !== null && event.clientX !== undefined) {\n      var doc = document.documentElement;\n      var body = document.body;\n\n      event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n      event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n    }\n\n    // Handle key presses\n    event.which = event.charCode || event.keyCode;\n\n    // Fix button for mouse clicks:\n    // 0 == left; 1 == middle; 2 == right\n    if (event.button !== null && event.button !== undefined) {\n\n      // The following is disabled because it does not pass videojs-standard\n      // and... yikes.\n      /* eslint-disable */\n      event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n      /* eslint-enable */\n    }\n  }\n\n  // Returns fixed-up instance\n  return event;\n}\n\n/**\n * Whether passive event listeners are supported\n */\nvar _supportsPassive = false;\n\n(function () {\n  try {\n    var opts = Object.defineProperty({}, 'passive', {\n      get: function get() {\n        _supportsPassive = true;\n      }\n    });\n\n    window.addEventListener('test', null, opts);\n    window.removeEventListener('test', null, opts);\n  } catch (e) {\n    // disregard\n  }\n})();\n\n/**\n * Touch events Chrome expects to be passive\n */\nvar passiveEvents = ['touchstart', 'touchmove'];\n\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string|string[]} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} fn\n *        Event listener.\n */\nfunction on(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(on, elem, type, fn);\n  }\n\n  var data = getData(elem);\n\n  // We need a place to store all our handler data\n  if (!data.handlers) {\n    data.handlers = {};\n  }\n\n  if (!data.handlers[type]) {\n    data.handlers[type] = [];\n  }\n\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  data.handlers[type].push(fn);\n\n  if (!data.dispatcher) {\n    data.disabled = false;\n\n    data.dispatcher = function (event, hash) {\n\n      if (data.disabled) {\n        return;\n      }\n\n      event = fixEvent(event);\n\n      var handlers = data.handlers[event.type];\n\n      if (handlers) {\n        // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n        var handlersCopy = handlers.slice(0);\n\n        for (var m = 0, n = handlersCopy.length; m < n; m++) {\n          if (event.isImmediatePropagationStopped()) {\n            break;\n          } else {\n            try {\n              handlersCopy[m].call(elem, event, hash);\n            } catch (e) {\n              log.error(e);\n            }\n          }\n        }\n      }\n    };\n  }\n\n  if (data.handlers[type].length === 1) {\n    if (elem.addEventListener) {\n      var options = false;\n\n      if (_supportsPassive && passiveEvents.indexOf(type) > -1) {\n        options = { passive: true };\n      }\n      elem.addEventListener(type, data.dispatcher, options);\n    } else if (elem.attachEvent) {\n      elem.attachEvent('on' + type, data.dispatcher);\n    }\n  }\n}\n\n/**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n *        Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n *        Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {EventTarget~EventListener} [fn]\n *        Specific listener to remove. Don't include to remove listeners for an event\n *        type.\n */\nfunction off(elem, type, fn) {\n  // Don't want to add a cache object through getElData if not needed\n  if (!hasData(elem)) {\n    return;\n  }\n\n  var data = getData(elem);\n\n  // If no events exist, nothing to unbind\n  if (!data.handlers) {\n    return;\n  }\n\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(off, elem, type, fn);\n  }\n\n  // Utility function\n  var removeType = function removeType(el, t) {\n    data.handlers[t] = [];\n    _cleanUpEvents(el, t);\n  };\n\n  // Are we removing all bound events?\n  if (type === undefined) {\n    for (var t in data.handlers) {\n      if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n        removeType(elem, t);\n      }\n    }\n    return;\n  }\n\n  var handlers = data.handlers[type];\n\n  // If no handlers exist, nothing to unbind\n  if (!handlers) {\n    return;\n  }\n\n  // If no listener was provided, remove all listeners for type\n  if (!fn) {\n    removeType(elem, type);\n    return;\n  }\n\n  // We're only removing a single handler\n  if (fn.guid) {\n    for (var n = 0; n < handlers.length; n++) {\n      if (handlers[n].guid === fn.guid) {\n        handlers.splice(n--, 1);\n      }\n    }\n  }\n\n  _cleanUpEvents(elem, type);\n}\n\n/**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n *        Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n *        A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n *        data hash to pass along with the event\n *\n * @return {boolean|undefined}\n *         - Returns the opposite of `defaultPrevented` if default was prevented\n *         - Otherwise returns undefined\n */\nfunction trigger(elem, event, hash) {\n  // Fetches element data and a reference to the parent (for bubbling).\n  // Don't want to add a data object to cache for every parent,\n  // so checking hasElData first.\n  var elemData = hasData(elem) ? getData(elem) : {};\n  var parent = elem.parentNode || elem.ownerDocument;\n  // type = event.type || event,\n  // handler;\n\n  // If an event name was passed as a string, creates an event out of it\n  if (typeof event === 'string') {\n    event = { type: event, target: elem };\n  } else if (!event.target) {\n    event.target = elem;\n  }\n\n  // Normalizes the event properties.\n  event = fixEvent(event);\n\n  // If the passed element has a dispatcher, executes the established handlers.\n  if (elemData.dispatcher) {\n    elemData.dispatcher.call(elem, event, hash);\n  }\n\n  // Unless explicitly stopped or the event does not bubble (e.g. media events)\n  // recursively calls this function to bubble the event up the DOM.\n  if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n    trigger.call(null, parent, event, hash);\n\n    // If at the top of the DOM, triggers the default action unless disabled.\n  } else if (!parent && !event.defaultPrevented) {\n    var targetData = getData(event.target);\n\n    // Checks if the target has a default action for this event.\n    if (event.target[event.type]) {\n      // Temporarily disables event dispatching on the target as we have already executed the handler.\n      targetData.disabled = true;\n      // Executes the default action.\n      if (typeof event.target[event.type] === 'function') {\n        event.target[event.type]();\n      }\n      // Re-enables event dispatching.\n      targetData.disabled = false;\n    }\n  }\n\n  // Inform the triggerer if the default was prevented by returning false\n  return !event.defaultPrevented;\n}\n\n/**\n * Trigger a listener only once for an event\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event Listener function\n */\nfunction one(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(one, elem, type, fn);\n  }\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  };\n\n  // copy the guid to the new function so it can removed using the original function's ID\n  func.guid = fn.guid = fn.guid || newGUID();\n  on(elem, type, func);\n}\n\nvar Events = (Object.freeze || Object)({\n\tfixEvent: fixEvent,\n\ton: on,\n\toff: off,\n\ttrigger: trigger,\n\tone: one\n});\n\n/**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\nvar _windowLoaded = false;\nvar videojs$2 = void 0;\n\n/**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\nvar autoSetup = function autoSetup() {\n\n  // Protect against breakage in non-browser environments and check global autoSetup option.\n  if (!isReal() || videojs$2.options.autoSetup === false) {\n    return;\n  }\n\n  // One day, when we stop supporting IE8, go back to this, but in the meantime...*hack hack hack*\n  // var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n  // var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n  // var mediaEls = vids.concat(audios);\n\n  // Because IE8 doesn't support calling slice on a node list, we need to loop\n  // through each list of elements to build up a new, combined list of elements.\n  var vids = document.getElementsByTagName('video');\n  var audios = document.getElementsByTagName('audio');\n  var divs = document.getElementsByTagName('video-js');\n  var mediaEls = [];\n\n  if (vids && vids.length > 0) {\n    for (var i = 0, e = vids.length; i < e; i++) {\n      mediaEls.push(vids[i]);\n    }\n  }\n\n  if (audios && audios.length > 0) {\n    for (var _i = 0, _e = audios.length; _i < _e; _i++) {\n      mediaEls.push(audios[_i]);\n    }\n  }\n\n  if (divs && divs.length > 0) {\n    for (var _i2 = 0, _e2 = divs.length; _i2 < _e2; _i2++) {\n      mediaEls.push(divs[_i2]);\n    }\n  }\n\n  // Check if any media elements exist\n  if (mediaEls && mediaEls.length > 0) {\n\n    for (var _i3 = 0, _e3 = mediaEls.length; _i3 < _e3; _i3++) {\n      var mediaEl = mediaEls[_i3];\n\n      // Check if element exists, has getAttribute func.\n      // IE seems to consider typeof el.getAttribute == 'object' instead of\n      // 'function' like expected, at least when loading the player immediately.\n      if (mediaEl && mediaEl.getAttribute) {\n\n        // Make sure this player hasn't already been set up.\n        if (mediaEl.player === undefined) {\n          var options = mediaEl.getAttribute('data-setup');\n\n          // Check if data-setup attr exists.\n          // We only auto-setup if they've added the data-setup attr.\n          if (options !== null) {\n            // Create new video.js instance.\n            videojs$2(mediaEl);\n          }\n        }\n\n        // If getAttribute isn't defined, we need to wait for the DOM.\n      } else {\n        autoSetupTimeout(1);\n        break;\n      }\n    }\n\n    // No videos were found, so keep looping unless page is finished loading.\n  } else if (!_windowLoaded) {\n    autoSetupTimeout(1);\n  }\n};\n\n/**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n *        How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n *        The videojs library function\n */\nfunction autoSetupTimeout(wait, vjs) {\n  if (vjs) {\n    videojs$2 = vjs;\n  }\n\n  window.setTimeout(autoSetup, wait);\n}\n\nif (isReal() && document.readyState === 'complete') {\n  _windowLoaded = true;\n} else {\n  /**\n   * Listen for the load event on window, and set _windowLoaded to true.\n   *\n   * @listens load\n   */\n  one(window, 'load', function () {\n    _windowLoaded = true;\n  });\n}\n\n/**\n * @file stylesheet.js\n * @module stylesheet\n */\n/**\n * Create a DOM syle element given a className for it.\n *\n * @param {string} className\n *        The className to add to the created style element.\n *\n * @return {Element}\n *         The element that was created.\n */\nvar createStyleElement = function createStyleElement(className) {\n  var style = document.createElement('style');\n\n  style.className = className;\n\n  return style;\n};\n\n/**\n * Add text to a DOM element.\n *\n * @param {Element} el\n *        The Element to add text content to.\n *\n * @param {string} content\n *        The text to add to the element.\n */\nvar setTextContent = function setTextContent(el, content) {\n  if (el.styleSheet) {\n    el.styleSheet.cssText = content;\n  } else {\n    el.textContent = content;\n  }\n};\n\n/**\n * @file fn.js\n * @module fn\n */\n/**\n * Bind (a.k.a proxy or Context). A simple method for changing the context of a function\n * It also stores a unique id on the function so it can be easily removed from events.\n *\n * @param {Mixed} context\n *        The object to bind as scope.\n *\n * @param {Function} fn\n *        The function to be bound to a scope.\n *\n * @param {number} [uid]\n *        An optional unique ID for the function to be set\n *\n * @return {Function}\n *         The new function that will be bound into the context given\n */\nvar bind = function bind(context, fn, uid) {\n  // Make sure the function has a unique ID\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  // Create the new function that changes the context\n  var bound = function bound() {\n    return fn.apply(context, arguments);\n  };\n\n  // Allow for the ability to individualize this function\n  // Needed in the case where multiple objects might share the same prototype\n  // IF both items add an event listener with the same function, then you try to remove just one\n  // it will remove both because they both have the same guid.\n  // when using this, you need to use the bind method when you remove the listener as well.\n  // currently used in text tracks\n  bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n\n  return bound;\n};\n\n/**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @param  {Function} fn\n *         The function to be throttled.\n *\n * @param  {Number}   wait\n *         The number of milliseconds by which to throttle.\n *\n * @return {Function}\n */\nvar throttle = function throttle(fn, wait) {\n  var last = Date.now();\n\n  var throttled = function throttled() {\n    var now = Date.now();\n\n    if (now - last >= wait) {\n      fn.apply(undefined, arguments);\n      last = now;\n    }\n  };\n\n  return throttled;\n};\n\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @param  {Function} func\n *         The function to wrap with debounce behavior.\n *\n * @param  {number} wait\n *         The number of milliseconds to wait after the last invocation.\n *\n * @param  {boolean} [immediate]\n *         Whether or not to invoke the function immediately upon creation.\n *\n * @param  {Object} [context=window]\n *         The \"context\" in which the debounced function should debounce. For\n *         example, if this function should be tied to a Video.js player,\n *         the player can be passed here. Alternatively, defaults to the\n *         global `window` object.\n *\n * @return {Function}\n *         A debounced function.\n */\nvar debounce = function debounce(func, wait, immediate) {\n  var context = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : window;\n\n  var timeout = void 0;\n\n  var cancel = function cancel() {\n    context.clearTimeout(timeout);\n    timeout = null;\n  };\n\n  /* eslint-disable consistent-this */\n  var debounced = function debounced() {\n    var self = this;\n    var args = arguments;\n\n    var _later = function later() {\n      timeout = null;\n      _later = null;\n      if (!immediate) {\n        func.apply(self, args);\n      }\n    };\n\n    if (!timeout && immediate) {\n      func.apply(self, args);\n    }\n\n    context.clearTimeout(timeout);\n    timeout = context.setTimeout(_later, wait);\n  };\n  /* eslint-enable consistent-this */\n\n  debounced.cancel = cancel;\n\n  return debounced;\n};\n\n/**\n * @file src/js/event-target.js\n */\n/**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\nvar EventTarget = function EventTarget() {};\n\n/**\n * A Custom DOM event.\n *\n * @typedef {Object} EventTarget~Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n/**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {EventTarget~Event} event\n *        the event that triggered this function\n *\n * @param {Object} [hash]\n *        hash of data sent during the event\n */\n\n/**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n *         will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\nEventTarget.prototype.allowedEvents_ = {};\n\n/**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to call with `EventTarget`s\n */\nEventTarget.prototype.on = function (type, fn) {\n  // Remove the addEventListener alias before calling Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n  on(this, type, fn);\n  this.addEventListener = ael;\n};\n\n/**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\nEventTarget.prototype.addEventListener = EventTarget.prototype.on;\n\n/**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to remove.\n */\nEventTarget.prototype.off = function (type, fn) {\n  off(this, type, fn);\n};\n\n/**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\nEventTarget.prototype.removeEventListener = EventTarget.prototype.off;\n\n/**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to be called once for each event name.\n */\nEventTarget.prototype.one = function (type, fn) {\n  // Remove the addEventListener alialing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n  one(this, type, fn);\n  this.addEventListener = ael;\n};\n\n/**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n *        The name of the event, an `Event`, or an object with a key of type set to\n *        an event name.\n */\nEventTarget.prototype.trigger = function (event) {\n  var type = event.type || event;\n\n  if (typeof event === 'string') {\n    event = { type: type };\n  }\n  event = fixEvent(event);\n\n  if (this.allowedEvents_[type] && this['on' + type]) {\n    this['on' + type](event);\n  }\n\n  trigger(this, event);\n};\n\n/**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\nEventTarget.prototype.dispatchEvent = EventTarget.prototype.trigger;\n\n/**\n * @file mixins/evented.js\n * @module evented\n */\n/**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to test.\n *\n * @return {boolean}\n *         Whether or not the object appears to be evented.\n */\nvar isEvented = function isEvented(object) {\n  return object instanceof EventTarget || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {\n    return typeof object[k] === 'function';\n  });\n};\n\n/**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param  {string|Array} type\n *         The type value to test.\n *\n * @return {boolean}\n *         Whether or not the type is a valid event type.\n */\nvar isValidEventType = function isValidEventType(type) {\n  return (\n    // The regex here verifies that the `type` contains at least one non-\n    // whitespace character.\n    typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length\n  );\n};\n\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the target does not appear to be a valid event target.\n *\n * @param  {Object} target\n *         The object to test.\n */\nvar validateTarget = function validateTarget(target) {\n  if (!target.nodeName && !isEvented(target)) {\n    throw new Error('Invalid target; must be a DOM node or evented object.');\n  }\n};\n\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the type does not appear to be a valid event type.\n *\n * @param  {string|Array} type\n *         The type to test.\n */\nvar validateEventType = function validateEventType(type) {\n  if (!isValidEventType(type)) {\n    throw new Error('Invalid event type; must be a non-empty string or array.');\n  }\n};\n\n/**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the listener is not a function.\n *\n * @param  {Function} listener\n *         The listener to test.\n */\nvar validateListener = function validateListener(listener) {\n  if (typeof listener !== 'function') {\n    throw new Error('Invalid listener; must be a function.');\n  }\n};\n\n/**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param  {Object} self\n *         The evented object on which `on()` or `one()` was called. This\n *         object will be bound as the `this` value for the listener.\n *\n * @param  {Array} args\n *         An array of arguments passed to `on()` or `one()`.\n *\n * @return {Object}\n *         An object containing useful values for `on()` or `one()` calls.\n */\nvar normalizeListenArgs = function normalizeListenArgs(self, args) {\n\n  // If the number of arguments is less than 3, the target is always the\n  // evented object itself.\n  var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n  var target = void 0;\n  var type = void 0;\n  var listener = void 0;\n\n  if (isTargetingSelf) {\n    target = self.eventBusEl_;\n\n    // Deal with cases where we got 3 arguments, but we are still listening to\n    // the evented object itself.\n    if (args.length >= 3) {\n      args.shift();\n    }\n\n    type = args[0];\n    listener = args[1];\n  } else {\n    target = args[0];\n    type = args[1];\n    listener = args[2];\n  }\n\n  validateTarget(target);\n  validateEventType(type);\n  validateListener(listener);\n\n  listener = bind(self, listener);\n\n  return { isTargetingSelf: isTargetingSelf, target: target, type: type, listener: listener };\n};\n\n/**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param  {Element|Object} target\n *         A DOM node or evented object.\n *\n * @param  {string} method\n *         The event binding method to use (\"on\" or \"one\").\n *\n * @param  {string|Array} type\n *         One or more event type(s).\n *\n * @param  {Function} listener\n *         A listener function.\n */\nvar listen = function listen(target, method, type, listener) {\n  validateTarget(target);\n\n  if (target.nodeName) {\n    Events[method](target, type, listener);\n  } else {\n    target[method](type, listener);\n  }\n};\n\n/**\n * Contains methods that provide event capabilites to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\nvar EventedMixin = {\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  on: function on$$1() {\n    var _this = this;\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var _normalizeListenArgs = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,\n        target = _normalizeListenArgs.target,\n        type = _normalizeListenArgs.type,\n        listener = _normalizeListenArgs.listener;\n\n    listen(target, 'on', type, listener);\n\n    // If this object is listening to another evented object.\n    if (!isTargetingSelf) {\n\n      // If this object is disposed, remove the listener.\n      var removeListenerOnDispose = function removeListenerOnDispose() {\n        return _this.off(target, type, listener);\n      };\n\n      // Use the same function ID as the listener so we can remove it later it\n      // using the ID of the original listener.\n      removeListenerOnDispose.guid = listener.guid;\n\n      // Add a listener to the target's dispose event as well. This ensures\n      // that if the target is disposed BEFORE this object, we remove the\n      // removal listener that was just added. Otherwise, we create a memory leak.\n      var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {\n        return _this.off('dispose', removeListenerOnDispose);\n      };\n\n      // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n      removeRemoverOnTargetDispose.guid = listener.guid;\n\n      listen(this, 'on', 'dispose', removeListenerOnDispose);\n      listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n    }\n  },\n\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will only be called once and then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  one: function one$$1() {\n    var _this2 = this;\n\n    for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    var _normalizeListenArgs2 = normalizeListenArgs(this, args),\n        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,\n        target = _normalizeListenArgs2.target,\n        type = _normalizeListenArgs2.type,\n        listener = _normalizeListenArgs2.listener;\n\n    // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'one', type, listener);\n\n      // Targeting another evented object.\n    } else {\n      var wrapper = function wrapper() {\n        for (var _len3 = arguments.length, largs = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n          largs[_key3] = arguments[_key3];\n        }\n\n        _this2.off(target, type, wrapper);\n        listener.apply(null, largs);\n      };\n\n      // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n      wrapper.guid = listener.guid;\n      listen(target, 'one', type, wrapper);\n    }\n  },\n\n\n  /**\n   * Removes listener(s) from event(s) on an evented object.\n   *\n   * @param  {string|Array|Element|Object} [targetOrType]\n   *         If this is a string or array, it represents the event type(s).\n   *\n   *         Another evented object can be passed here instead, in which case\n   *         ALL 3 arguments are _required_.\n   *\n   * @param  {string|Array|Function} [typeOrListener]\n   *         If the first argument was a string or array, this may be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function; otherwise, _all_ listeners bound to the\n   *         event type(s) will be removed.\n   */\n  off: function off$$1(targetOrType, typeOrListener, listener) {\n\n    // Targeting this evented object.\n    if (!targetOrType || isValidEventType(targetOrType)) {\n      off(this.eventBusEl_, targetOrType, typeOrListener);\n\n      // Targeting another evented object.\n    } else {\n      var target = targetOrType;\n      var type = typeOrListener;\n\n      // Fail fast and in a meaningful way!\n      validateTarget(target);\n      validateEventType(type);\n      validateListener(listener);\n\n      // Ensure there's at least a guid, even if the function hasn't been used\n      listener = bind(this, listener);\n\n      // Remove the dispose listener on this evented object, which was given\n      // the same guid as the event listener in on().\n      this.off('dispose', listener);\n\n      if (target.nodeName) {\n        off(target, type, listener);\n        off(target, 'dispose', listener);\n      } else if (isEvented(target)) {\n        target.off(type, listener);\n        target.off('dispose', listener);\n      }\n    }\n  },\n\n\n  /**\n   * Fire an event on this evented object, causing its listeners to be called.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash]\n   *          An additional object to pass along to listeners.\n   *\n   * @returns {boolean}\n   *          Whether or not the default behavior was prevented.\n   */\n  trigger: function trigger$$1(event, hash) {\n    return trigger(this.eventBusEl_, event, hash);\n  }\n};\n\n/**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param  {Object} target\n *         The object to which to add event methods.\n *\n * @param  {Object} [options={}]\n *         Options for customizing the mixin behavior.\n *\n * @param  {String} [options.eventBusKey]\n *         By default, adds a `eventBusEl_` DOM element to the target object,\n *         which is used as an event bus. If the target object already has a\n *         DOM element that should be used, pass its key here.\n *\n * @return {Object}\n *         The target object.\n */\nfunction evented(target) {\n  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n  var eventBusKey = options.eventBusKey;\n\n  // Set or create the eventBusEl_.\n\n  if (eventBusKey) {\n    if (!target[eventBusKey].nodeName) {\n      throw new Error('The eventBusKey \"' + eventBusKey + '\" does not refer to an element.');\n    }\n    target.eventBusEl_ = target[eventBusKey];\n  } else {\n    target.eventBusEl_ = createEl('span', { className: 'vjs-event-bus' });\n  }\n\n  assign(target, EventedMixin);\n\n  // When any evented object is disposed, it removes all its listeners.\n  target.on('dispose', function () {\n    target.off();\n    window.setTimeout(function () {\n      target.eventBusEl_ = null;\n    }, 0);\n  });\n\n  return target;\n}\n\n/**\n * @file mixins/stateful.js\n * @module stateful\n */\n/**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\nvar StatefulMixin = {\n\n  /**\n   * A hash containing arbitrary keys and values representing the state of\n   * the object.\n   *\n   * @type {Object}\n   */\n  state: {},\n\n  /**\n   * Set the state of an object by mutating its\n   * {@link module:stateful~StatefulMixin.state|state} object in place.\n   *\n   * @fires   module:stateful~StatefulMixin#statechanged\n   * @param   {Object|Function} stateUpdates\n   *          A new set of properties to shallow-merge into the plugin state.\n   *          Can be a plain object or a function returning a plain object.\n   *\n   * @returns {Object|undefined}\n   *          An object containing changes that occurred. If no changes\n   *          occurred, returns `undefined`.\n   */\n  setState: function setState(stateUpdates) {\n    var _this = this;\n\n    // Support providing the `stateUpdates` state as a function.\n    if (typeof stateUpdates === 'function') {\n      stateUpdates = stateUpdates();\n    }\n\n    var changes = void 0;\n\n    each(stateUpdates, function (value, key) {\n\n      // Record the change if the value is different from what's in the\n      // current state.\n      if (_this.state[key] !== value) {\n        changes = changes || {};\n        changes[key] = {\n          from: _this.state[key],\n          to: value\n        };\n      }\n\n      _this.state[key] = value;\n    });\n\n    // Only trigger \"statechange\" if there were changes AND we have a trigger\n    // function. This allows us to not require that the target object be an\n    // evented object.\n    if (changes && isEvented(this)) {\n\n      /**\n       * An event triggered on an object that is both\n       * {@link module:stateful|stateful} and {@link module:evented|evented}\n       * indicating that its state has changed.\n       *\n       * @event    module:stateful~StatefulMixin#statechanged\n       * @type     {Object}\n       * @property {Object} changes\n       *           A hash containing the properties that were changed and\n       *           the values they were changed `from` and `to`.\n       */\n      this.trigger({\n        changes: changes,\n        type: 'statechanged'\n      });\n    }\n\n    return changes;\n  }\n};\n\n/**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param   {Object} target\n *          The object to be made stateful.\n *\n * @param   {Object} [defaultState]\n *          A default set of properties to populate the newly-stateful object's\n *          `state` property.\n *\n * @returns {Object}\n *          Returns the `target`.\n */\nfunction stateful(target, defaultState) {\n  assign(target, StatefulMixin);\n\n  // This happens after the mixing-in because we need to replace the `state`\n  // added in that step.\n  target.state = assign({}, target.state, defaultState);\n\n  // Auto-bind the `handleStateChanged` method of the target object if it exists.\n  if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n    target.on('statechanged', target.handleStateChanged);\n  }\n\n  return target;\n}\n\n/**\n * @file to-title-case.js\n * @module to-title-case\n */\n\n/**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n *        String to be uppercased\n *\n * @return {string}\n *         The string with an uppercased first letter\n */\nfunction toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.charAt(0).toUpperCase() + string.slice(1);\n}\n\n/**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n *        The first string to compare\n *\n * @param {string} str2\n *        The second string to compare\n *\n * @return {boolean}\n *         Whether the TitleCase versions of the strings are equal\n */\nfunction titleCaseEquals(str1, str2) {\n  return toTitleCase(str1) === toTitleCase(str2);\n}\n\n/**\n * @file merge-options.js\n * @module merge-options\n */\n/**\n * Deep-merge one or more options objects, recursively merging **only** plain\n * object properties.\n *\n * @param   {Object[]} sources\n *          One or more objects to merge into a new object.\n *\n * @returns {Object}\n *          A new object that is the merged result of all sources.\n */\nfunction mergeOptions() {\n  var result = {};\n\n  for (var _len = arguments.length, sources = Array(_len), _key = 0; _key < _len; _key++) {\n    sources[_key] = arguments[_key];\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      if (!isPlain(value)) {\n        result[key] = value;\n        return;\n      }\n\n      if (!isPlain(result[key])) {\n        result[key] = {};\n      }\n\n      result[key] = mergeOptions(result[key], value);\n    });\n  });\n\n  return result;\n}\n\n/**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n/**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n\nvar Component = function () {\n\n  /**\n   * A callback that is called when a component is ready. Does not have any\n   * paramters and any callback value will be ignored.\n   *\n   * @callback Component~ReadyCallback\n   * @this Component\n   */\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Object[]} [options.children]\n   *        An array of children objects to intialize this component with. Children objects have\n   *        a name property that will be used if more than one component of the same type needs to be\n   *        added.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Function that gets called when the `Component` is ready.\n   */\n  function Component(player, options, ready) {\n    classCallCheck(this, Component);\n\n\n    // The component might be the player itself and we can't pass `this` to super\n    if (!player && this.play) {\n      this.player_ = player = this; // eslint-disable-line\n    } else {\n      this.player_ = player;\n    }\n\n    // Make a copy of prototype.options_ to protect against overriding defaults\n    this.options_ = mergeOptions({}, this.options_);\n\n    // Updated options with supplied options\n    options = this.options_ = mergeOptions(this.options_, options);\n\n    // Get ID from options or options element if one is supplied\n    this.id_ = options.id || options.el && options.el.id;\n\n    // If there was no ID from the options, generate one\n    if (!this.id_) {\n      // Don't require the player ID function in the case of mock players\n      var id = player && player.id && player.id() || 'no_player';\n\n      this.id_ = id + '_component_' + newGUID();\n    }\n\n    this.name_ = options.name || null;\n\n    // Create element if one wasn't provided in options\n    if (options.el) {\n      this.el_ = options.el;\n    } else if (options.createEl !== false) {\n      this.el_ = this.createEl();\n    }\n\n    // if evented is anything except false, we want to mixin in evented\n    if (options.evented !== false) {\n      // Make this an evented object and use `el_`, if available, as its event bus\n      evented(this, { eventBusKey: this.el_ ? 'el_' : null });\n    }\n    stateful(this, this.constructor.defaultState);\n\n    this.children_ = [];\n    this.childIndex_ = {};\n    this.childNameIndex_ = {};\n\n    // Add any child components in options\n    if (options.initChildren !== false) {\n      this.initChildren();\n    }\n\n    this.ready(ready);\n    // Don't want to trigger ready here or it will before init is actually\n    // finished for all children that run this constructor\n\n    if (options.reportTouchActivity !== false) {\n      this.enableTouchActivity();\n    }\n  }\n\n  /**\n   * Dispose of the `Component` and all child components.\n   *\n   * @fires Component#dispose\n   */\n\n\n  Component.prototype.dispose = function dispose() {\n\n    /**\n     * Triggered when a `Component` is disposed.\n     *\n     * @event Component#dispose\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up\n     */\n    this.trigger({ type: 'dispose', bubbles: false });\n\n    // Dispose all children.\n    if (this.children_) {\n      for (var i = this.children_.length - 1; i >= 0; i--) {\n        if (this.children_[i].dispose) {\n          this.children_[i].dispose();\n        }\n      }\n    }\n\n    // Delete child references\n    this.children_ = null;\n    this.childIndex_ = null;\n    this.childNameIndex_ = null;\n\n    if (this.el_) {\n      // Remove element from DOM\n      if (this.el_.parentNode) {\n        this.el_.parentNode.removeChild(this.el_);\n      }\n\n      removeData(this.el_);\n      this.el_ = null;\n    }\n\n    // remove reference to the player after disposing of the element\n    this.player_ = null;\n  };\n\n  /**\n   * Return the {@link Player} that the `Component` has attached to.\n   *\n   * @return {Player}\n   *         The player that this `Component` has attached to.\n   */\n\n\n  Component.prototype.player = function player() {\n    return this.player_;\n  };\n\n  /**\n   * Deep merge of options objects with new options.\n   * > Note: When both `obj` and `options` contain properties whose values are objects.\n   *         The two properties get merged using {@link module:mergeOptions}\n   *\n   * @param {Object} obj\n   *        The object that contains new options.\n   *\n   * @return {Object}\n   *         A new object of `this.options_` and `obj` merged together.\n   *\n   * @deprecated since version 5\n   */\n\n\n  Component.prototype.options = function options(obj) {\n    log.warn('this.options() has been deprecated and will be moved to the constructor in 6.0');\n\n    if (!obj) {\n      return this.options_;\n    }\n\n    this.options_ = mergeOptions(this.options_, obj);\n    return this.options_;\n  };\n\n  /**\n   * Get the `Component`s DOM element\n   *\n   * @return {Element}\n   *         The DOM element for this `Component`.\n   */\n\n\n  Component.prototype.el = function el() {\n    return this.el_;\n  };\n\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tagName]\n   *        Element's DOM node type. e.g. 'div'\n   *\n   * @param {Object} [properties]\n   *        An object of properties that should be set.\n   *\n   * @param {Object} [attributes]\n   *        An object of attributes that should be set.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  Component.prototype.createEl = function createEl$$1(tagName, properties, attributes) {\n    return createEl(tagName, properties, attributes);\n  };\n\n  /**\n   * Localize a string given the string in english.\n   *\n   * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n   * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n   *\n   * If a `defaultValue` is provided, it'll use that over `string`,\n   * if a value isn't found in provided language files.\n   * This is useful if you want to have a descriptive key for token replacement\n   * but have a succinct localized string and not require `en.json` to be included.\n   *\n   * Currently, it is used for the progress bar timing.\n   * ```js\n   * {\n   *   \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n   * }\n   * ```\n   * It is then used like so:\n   * ```js\n   * this.localize('progress bar timing: currentTime={1} duration{2}',\n   *               [this.player_.currentTime(), this.player_.duration()],\n   *               '{1} of {2}');\n   * ```\n   *\n   * Which outputs something like: `01:23 of 24:56`.\n   *\n   *\n   * @param {string} string\n   *        The string to localize and the key to lookup in the language files.\n   * @param {string[]} [tokens]\n   *        If the current item has token replacements, provide the tokens here.\n   * @param {string} [defaultValue]\n   *        Defaults to `string`. Can be a default value to use for token replacement\n   *        if the lookup key is needed to be separate.\n   *\n   * @return {string}\n   *         The localized string or if no localization exists the english string.\n   */\n\n\n  Component.prototype.localize = function localize(string, tokens) {\n    var defaultValue = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : string;\n\n    var code = this.player_.language && this.player_.language();\n    var languages = this.player_.languages && this.player_.languages();\n    var language = languages && languages[code];\n    var primaryCode = code && code.split('-')[0];\n    var primaryLang = languages && languages[primaryCode];\n\n    var localizedString = defaultValue;\n\n    if (language && language[string]) {\n      localizedString = language[string];\n    } else if (primaryLang && primaryLang[string]) {\n      localizedString = primaryLang[string];\n    }\n\n    if (tokens) {\n      localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n        var value = tokens[index - 1];\n        var ret = value;\n\n        if (typeof value === 'undefined') {\n          ret = match;\n        }\n\n        return ret;\n      });\n    }\n\n    return localizedString;\n  };\n\n  /**\n   * Return the `Component`s DOM element. This is where children get inserted.\n   * This will usually be the the same as the element returned in {@link Component#el}.\n   *\n   * @return {Element}\n   *         The content element for this `Component`.\n   */\n\n\n  Component.prototype.contentEl = function contentEl() {\n    return this.contentEl_ || this.el_;\n  };\n\n  /**\n   * Get this `Component`s ID\n   *\n   * @return {string}\n   *         The id of this `Component`\n   */\n\n\n  Component.prototype.id = function id() {\n    return this.id_;\n  };\n\n  /**\n   * Get the `Component`s name. The name gets used to reference the `Component`\n   * and is set during registration.\n   *\n   * @return {string}\n   *         The name of this `Component`.\n   */\n\n\n  Component.prototype.name = function name() {\n    return this.name_;\n  };\n\n  /**\n   * Get an array of all child components\n   *\n   * @return {Array}\n   *         The children\n   */\n\n\n  Component.prototype.children = function children() {\n    return this.children_;\n  };\n\n  /**\n   * Returns the child `Component` with the given `id`.\n   *\n   * @param {string} id\n   *        The id of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `id` or undefined.\n   */\n\n\n  Component.prototype.getChildById = function getChildById(id) {\n    return this.childIndex_[id];\n  };\n\n  /**\n   * Returns the child `Component` with the given `name`.\n   *\n   * @param {string} name\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `name` or undefined.\n   */\n\n\n  Component.prototype.getChild = function getChild(name) {\n    if (!name) {\n      return;\n    }\n\n    name = toTitleCase(name);\n\n    return this.childNameIndex_[name];\n  };\n\n  /**\n   * Add a child `Component` inside the current `Component`.\n   *\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @param {number} [index=this.children_.length]\n   *        The index to attempt to add a child into.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   */\n\n\n  Component.prototype.addChild = function addChild(child) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var index = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.children_.length;\n\n    var component = void 0;\n    var componentName = void 0;\n\n    // If child is a string, create component with options\n    if (typeof child === 'string') {\n      componentName = toTitleCase(child);\n\n      var componentClassName = options.componentClass || componentName;\n\n      // Set name through options\n      options.name = componentName;\n\n      // Create a new object & element for this controls set\n      // If there's no .player_, this is a player\n      var ComponentClass = Component.getComponent(componentClassName);\n\n      if (!ComponentClass) {\n        throw new Error('Component ' + componentClassName + ' does not exist');\n      }\n\n      // data stored directly on the videojs object may be\n      // misidentified as a component to retain\n      // backwards-compatibility with 4.x. check to make sure the\n      // component class can be instantiated.\n      if (typeof ComponentClass !== 'function') {\n        return null;\n      }\n\n      component = new ComponentClass(this.player_ || this, options);\n\n      // child is a component instance\n    } else {\n      component = child;\n    }\n\n    this.children_.splice(index, 0, component);\n\n    if (typeof component.id === 'function') {\n      this.childIndex_[component.id()] = component;\n    }\n\n    // If a name wasn't used to create the component, check if we can use the\n    // name function of the component\n    componentName = componentName || component.name && toTitleCase(component.name());\n\n    if (componentName) {\n      this.childNameIndex_[componentName] = component;\n    }\n\n    // Add the UI object's element to the container div (box)\n    // Having an element is not required\n    if (typeof component.el === 'function' && component.el()) {\n      var childNodes = this.contentEl().children;\n      var refNode = childNodes[index] || null;\n\n      this.contentEl().insertBefore(component.el(), refNode);\n    }\n\n    // Return so it can stored on parent object if desired.\n    return component;\n  };\n\n  /**\n   * Remove a child `Component` from this `Component`s list of children. Also removes\n   * the child `Component`s element from this `Component`s element.\n   *\n   * @param {Component} component\n   *        The child `Component` to remove.\n   */\n\n\n  Component.prototype.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    if (!component || !this.children_) {\n      return;\n    }\n\n    var childFound = false;\n\n    for (var i = this.children_.length - 1; i >= 0; i--) {\n      if (this.children_[i] === component) {\n        childFound = true;\n        this.children_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!childFound) {\n      return;\n    }\n\n    this.childIndex_[component.id()] = null;\n    this.childNameIndex_[component.name()] = null;\n\n    var compEl = component.el();\n\n    if (compEl && compEl.parentNode === this.contentEl()) {\n      this.contentEl().removeChild(component.el());\n    }\n  };\n\n  /**\n   * Add and initialize default child `Component`s based upon options.\n   */\n\n\n  Component.prototype.initChildren = function initChildren() {\n    var _this = this;\n\n    var children = this.options_.children;\n\n    if (children) {\n      // `this` is `parent`\n      var parentOptions = this.options_;\n\n      var handleAdd = function handleAdd(child) {\n        var name = child.name;\n        var opts = child.opts;\n\n        // Allow options for children to be set at the parent options\n        // e.g. videojs(id, { controlBar: false });\n        // instead of videojs(id, { children: { controlBar: false });\n        if (parentOptions[name] !== undefined) {\n          opts = parentOptions[name];\n        }\n\n        // Allow for disabling default components\n        // e.g. options['children']['posterImage'] = false\n        if (opts === false) {\n          return;\n        }\n\n        // Allow options to be passed as a simple boolean if no configuration\n        // is necessary.\n        if (opts === true) {\n          opts = {};\n        }\n\n        // We also want to pass the original player options\n        // to each component as well so they don't need to\n        // reach back into the player for options later.\n        opts.playerOptions = _this.options_.playerOptions;\n\n        // Create and add the child component.\n        // Add a direct reference to the child by name on the parent instance.\n        // If two of the same component are used, different names should be supplied\n        // for each\n        var newChild = _this.addChild(name, opts);\n\n        if (newChild) {\n          _this[name] = newChild;\n        }\n      };\n\n      // Allow for an array of children details to passed in the options\n      var workingChildren = void 0;\n      var Tech = Component.getComponent('Tech');\n\n      if (Array.isArray(children)) {\n        workingChildren = children;\n      } else {\n        workingChildren = Object.keys(children);\n      }\n\n      workingChildren\n      // children that are in this.options_ but also in workingChildren  would\n      // give us extra children we do not want. So, we want to filter them out.\n      .concat(Object.keys(this.options_).filter(function (child) {\n        return !workingChildren.some(function (wchild) {\n          if (typeof wchild === 'string') {\n            return child === wchild;\n          }\n          return child === wchild.name;\n        });\n      })).map(function (child) {\n        var name = void 0;\n        var opts = void 0;\n\n        if (typeof child === 'string') {\n          name = child;\n          opts = children[name] || _this.options_[name] || {};\n        } else {\n          name = child.name;\n          opts = child;\n        }\n\n        return { name: name, opts: opts };\n      }).filter(function (child) {\n        // we have to make sure that child.name isn't in the techOrder since\n        // techs are registerd as Components but can't aren't compatible\n        // See https://github.com/videojs/video.js/issues/2772\n        var c = Component.getComponent(child.opts.componentClass || toTitleCase(child.name));\n\n        return c && !Tech.isTech(c);\n      }).forEach(handleAdd);\n    }\n  };\n\n  /**\n   * Builds the default DOM class name. Should be overriden by sub-components.\n   *\n   * @return {string}\n   *         The DOM class name for this object.\n   *\n   * @abstract\n   */\n\n\n  Component.prototype.buildCSSClass = function buildCSSClass() {\n    // Child classes can include a function that does:\n    // return 'CLASS NAME' + this._super();\n    return '';\n  };\n\n  /**\n   * Bind a listener to the component's ready state.\n   * Different from event listeners in that if the ready event has already happened\n   * it will trigger the function immediately.\n   *\n   * @return {Component}\n   *         Returns itself; method can be chained.\n   */\n\n\n  Component.prototype.ready = function ready(fn) {\n    var sync = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;\n\n    if (!fn) {\n      return;\n    }\n\n    if (!this.isReady_) {\n      this.readyQueue_ = this.readyQueue_ || [];\n      this.readyQueue_.push(fn);\n      return;\n    }\n\n    if (sync) {\n      fn.call(this);\n    } else {\n      // Call the function asynchronously by default for consistency\n      this.setTimeout(fn, 1);\n    }\n  };\n\n  /**\n   * Trigger all the ready listeners for this `Component`.\n   *\n   * @fires Component#ready\n   */\n\n\n  Component.prototype.triggerReady = function triggerReady() {\n    this.isReady_ = true;\n\n    // Ensure ready is triggered asynchronously\n    this.setTimeout(function () {\n      var readyQueue = this.readyQueue_;\n\n      // Reset Ready Queue\n      this.readyQueue_ = [];\n\n      if (readyQueue && readyQueue.length > 0) {\n        readyQueue.forEach(function (fn) {\n          fn.call(this);\n        }, this);\n      }\n\n      // Allow for using event listeners also\n      /**\n       * Triggered when a `Component` is ready.\n       *\n       * @event Component#ready\n       * @type {EventTarget~Event}\n       */\n      this.trigger('ready');\n    }, 1);\n  };\n\n  /**\n   * Find a single DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelector`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {Element|null}\n   *         the dom element that was found, or null\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n\n\n  Component.prototype.$ = function $$$1(selector, context) {\n    return $(selector, context || this.contentEl());\n  };\n\n  /**\n   * Finds all DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelectorAll`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {NodeList}\n   *         a list of dom elements that were found\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n\n\n  Component.prototype.$$ = function $$$$1(selector, context) {\n    return $$(selector, context || this.contentEl());\n  };\n\n  /**\n   * Check if a component's element has a CSS class name.\n   *\n   * @param {string} classToCheck\n   *        CSS class name to check.\n   *\n   * @return {boolean}\n   *         - True if the `Component` has the class.\n   *         - False if the `Component` does not have the class`\n   */\n\n\n  Component.prototype.hasClass = function hasClass$$1(classToCheck) {\n    return hasClass(this.el_, classToCheck);\n  };\n\n  /**\n   * Add a CSS class name to the `Component`s element.\n   *\n   * @param {string} classToAdd\n   *        CSS class name to add\n   */\n\n\n  Component.prototype.addClass = function addClass$$1(classToAdd) {\n    addClass(this.el_, classToAdd);\n  };\n\n  /**\n   * Remove a CSS class name from the `Component`s element.\n   *\n   * @param {string} classToRemove\n   *        CSS class name to remove\n   */\n\n\n  Component.prototype.removeClass = function removeClass$$1(classToRemove) {\n    removeClass(this.el_, classToRemove);\n  };\n\n  /**\n   * Add or remove a CSS class name from the component's element.\n   * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n   * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n   *\n   * @param  {string} classToToggle\n   *         The class to add or remove based on (@link Component#hasClass}\n   *\n   * @param  {boolean|Dom~predicate} [predicate]\n   *         An {@link Dom~predicate} function or a boolean\n   */\n\n\n  Component.prototype.toggleClass = function toggleClass$$1(classToToggle, predicate) {\n    toggleClass(this.el_, classToToggle, predicate);\n  };\n\n  /**\n   * Show the `Component`s element if it is hidden by removing the\n   * 'vjs-hidden' class name from it.\n   */\n\n\n  Component.prototype.show = function show() {\n    this.removeClass('vjs-hidden');\n  };\n\n  /**\n   * Hide the `Component`s element if it is currently showing by adding the\n   * 'vjs-hidden` class name to it.\n   */\n\n\n  Component.prototype.hide = function hide() {\n    this.addClass('vjs-hidden');\n  };\n\n  /**\n   * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n   * class name to it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n\n\n  Component.prototype.lockShowing = function lockShowing() {\n    this.addClass('vjs-lock-showing');\n  };\n\n  /**\n   * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n   * class name from it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n\n\n  Component.prototype.unlockShowing = function unlockShowing() {\n    this.removeClass('vjs-lock-showing');\n  };\n\n  /**\n   * Get the value of an attribute on the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to get the value from.\n   *\n   * @return {string|null}\n   *         - The value of the attribute that was asked for.\n   *         - Can be an empty string on some browsers if the attribute does not exist\n   *           or has no value\n   *         - Most browsers will return null if the attibute does not exist or has\n   *           no value.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n   */\n\n\n  Component.prototype.getAttribute = function getAttribute$$1(attribute) {\n    return getAttribute(this.el_, attribute);\n  };\n\n  /**\n   * Set the value of an attribute on the `Component`'s element\n   *\n   * @param {string} attribute\n   *        Name of the attribute to set.\n   *\n   * @param {string} value\n   *        Value to set the attribute to.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n   */\n\n\n  Component.prototype.setAttribute = function setAttribute$$1(attribute, value) {\n    setAttribute(this.el_, attribute, value);\n  };\n\n  /**\n   * Remove an attribute from the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to remove.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n   */\n\n\n  Component.prototype.removeAttribute = function removeAttribute$$1(attribute) {\n    removeAttribute(this.el_, attribute);\n  };\n\n  /**\n   * Get or set the width of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The width that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *           postpixed with '%' or 'px'.\n   */\n\n\n  Component.prototype.width = function width(num, skipListeners) {\n    return this.dimension('width', num, skipListeners);\n  };\n\n  /**\n   * Get or set the height of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The height that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *         postpixed with '%' or 'px'.\n   */\n\n\n  Component.prototype.height = function height(num, skipListeners) {\n    return this.dimension('height', num, skipListeners);\n  };\n\n  /**\n   * Set both the width and height of the `Component` element at the same time.\n   *\n   * @param  {number|string} width\n   *         Width to set the `Component`s element to.\n   *\n   * @param  {number|string} height\n   *         Height to set the `Component`s element to.\n   */\n\n\n  Component.prototype.dimensions = function dimensions(width, height) {\n    // Skip componentresize listeners on width for optimization\n    this.width(width, true);\n    this.height(height);\n  };\n\n  /**\n   * Get or set width or height of the `Component` element. This is the shared code\n   * for the {@link Component#width} and {@link Component#height}.\n   *\n   * Things to know:\n   * - If the width or height in an number this will return the number postfixed with 'px'.\n   * - If the width/height is a percent this will return the percent postfixed with '%'\n   * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n   *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n   *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n   *   for more information\n   * - If you want the computed style of the component, use {@link Component#currentWidth}\n   *   and {@link {Component#currentHeight}\n   *\n   * @fires Component#componentresize\n   *\n   * @param {string} widthOrHeight\n   8        'width' or 'height'\n   *\n   * @param  {number|string} [num]\n   8         New dimension\n   *\n   * @param  {boolean} [skipListeners]\n   *         Skip componentresize event trigger\n   *\n   * @return {number}\n   *         The dimension when getting or 0 if unset\n   */\n\n\n  Component.prototype.dimension = function dimension(widthOrHeight, num, skipListeners) {\n    if (num !== undefined) {\n      // Set to zero if null or literally NaN (NaN !== NaN)\n      if (num === null || num !== num) {\n        num = 0;\n      }\n\n      // Check if using css width/height (% or px) and adjust\n      if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n        this.el_.style[widthOrHeight] = num;\n      } else if (num === 'auto') {\n        this.el_.style[widthOrHeight] = '';\n      } else {\n        this.el_.style[widthOrHeight] = num + 'px';\n      }\n\n      // skipListeners allows us to avoid triggering the resize event when setting both width and height\n      if (!skipListeners) {\n        /**\n         * Triggered when a component is resized.\n         *\n         * @event Component#componentresize\n         * @type {EventTarget~Event}\n         */\n        this.trigger('componentresize');\n      }\n\n      return;\n    }\n\n    // Not setting a value, so getting it\n    // Make sure element exists\n    if (!this.el_) {\n      return 0;\n    }\n\n    // Get dimension value from style\n    var val = this.el_.style[widthOrHeight];\n    var pxIndex = val.indexOf('px');\n\n    if (pxIndex !== -1) {\n      // Return the pixel value with no 'px'\n      return parseInt(val.slice(0, pxIndex), 10);\n    }\n\n    // No px so using % or no style was set, so falling back to offsetWidth/height\n    // If component has display:none, offset will return 0\n    // TODO: handle display:none and no dimension style using px\n    return parseInt(this.el_['offset' + toTitleCase(widthOrHeight)], 10);\n  };\n\n  /**\n   * Get the computed width or the height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @param {string} widthOrHeight\n   *        A string containing 'width' or 'height'. Whichever one you want to get.\n   *\n   * @return {number}\n   *         The dimension that gets asked for or 0 if nothing was set\n   *         for that dimension.\n   */\n\n\n  Component.prototype.currentDimension = function currentDimension(widthOrHeight) {\n    var computedWidthOrHeight = 0;\n\n    if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n      throw new Error('currentDimension only accepts width or height value');\n    }\n\n    if (typeof window.getComputedStyle === 'function') {\n      var computedStyle = window.getComputedStyle(this.el_);\n\n      computedWidthOrHeight = computedStyle.getPropertyValue(widthOrHeight) || computedStyle[widthOrHeight];\n    }\n\n    // remove 'px' from variable and parse as integer\n    computedWidthOrHeight = parseFloat(computedWidthOrHeight);\n\n    // if the computed value is still 0, it's possible that the browser is lying\n    // and we want to check the offset values.\n    // This code also runs on IE8 and wherever getComputedStyle doesn't exist.\n    if (computedWidthOrHeight === 0) {\n      var rule = 'offset' + toTitleCase(widthOrHeight);\n\n      computedWidthOrHeight = this.el_[rule];\n    }\n\n    return computedWidthOrHeight;\n  };\n\n  /**\n   * An object that contains width and height values of the `Component`s\n   * computed style. Uses `window.getComputedStyle`.\n   *\n   * @typedef {Object} Component~DimensionObject\n   *\n   * @property {number} width\n   *           The width of the `Component`s computed style.\n   *\n   * @property {number} height\n   *           The height of the `Component`s computed style.\n   */\n\n  /**\n   * Get an object that contains computed width and height values of the\n   * component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {Component~DimensionObject}\n   *         The computed dimensions of the component's element.\n   */\n\n\n  Component.prototype.currentDimensions = function currentDimensions() {\n    return {\n      width: this.currentDimension('width'),\n      height: this.currentDimension('height')\n    };\n  };\n\n  /**\n   * Get the computed width of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed width of the component's element.\n   */\n\n\n  Component.prototype.currentWidth = function currentWidth() {\n    return this.currentDimension('width');\n  };\n\n  /**\n   * Get the computed height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed height of the component's element.\n   */\n\n\n  Component.prototype.currentHeight = function currentHeight() {\n    return this.currentDimension('height');\n  };\n\n  /**\n   * Set the focus to this component\n   */\n\n\n  Component.prototype.focus = function focus() {\n    this.el_.focus();\n  };\n\n  /**\n   * Remove the focus from this component\n   */\n\n\n  Component.prototype.blur = function blur() {\n    this.el_.blur();\n  };\n\n  /**\n   * Emit a 'tap' events when touch event support gets detected. This gets used to\n   * support toggling the controls through a tap on the video. They get enabled\n   * because every sub-component would have extra overhead otherwise.\n   *\n   * @private\n   * @fires Component#tap\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchleave\n   * @listens Component#touchcancel\n   * @listens Component#touchend\n    */\n\n\n  Component.prototype.emitTapEvents = function emitTapEvents() {\n    // Track the start time so we can determine how long the touch lasted\n    var touchStart = 0;\n    var firstTouch = null;\n\n    // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n    var tapMovementThreshold = 10;\n\n    // The maximum length a touch can be while still being considered a tap\n    var touchTimeThreshold = 200;\n\n    var couldBeTap = void 0;\n\n    this.on('touchstart', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length === 1) {\n        // Copy pageX/pageY from the object\n        firstTouch = {\n          pageX: event.touches[0].pageX,\n          pageY: event.touches[0].pageY\n        };\n        // Record start time so we can detect a tap vs. \"touch and hold\"\n        touchStart = new Date().getTime();\n        // Reset couldBeTap tracking\n        couldBeTap = true;\n      }\n    });\n\n    this.on('touchmove', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length > 1) {\n        couldBeTap = false;\n      } else if (firstTouch) {\n        // Some devices will throw touchmoves for all but the slightest of taps.\n        // So, if we moved only a small distance, this could still be a tap\n        var xdiff = event.touches[0].pageX - firstTouch.pageX;\n        var ydiff = event.touches[0].pageY - firstTouch.pageY;\n        var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n\n        if (touchDistance > tapMovementThreshold) {\n          couldBeTap = false;\n        }\n      }\n    });\n\n    var noTap = function noTap() {\n      couldBeTap = false;\n    };\n\n    // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n    this.on('touchleave', noTap);\n    this.on('touchcancel', noTap);\n\n    // When the touch ends, measure how long it took and trigger the appropriate\n    // event\n    this.on('touchend', function (event) {\n      firstTouch = null;\n      // Proceed only if the touchmove/leave/cancel event didn't happen\n      if (couldBeTap === true) {\n        // Measure how long the touch lasted\n        var touchTime = new Date().getTime() - touchStart;\n\n        // Make sure the touch was less than the threshold to be considered a tap\n        if (touchTime < touchTimeThreshold) {\n          // Don't let browser turn this into a click\n          event.preventDefault();\n          /**\n           * Triggered when a `Component` is tapped.\n           *\n           * @event Component#tap\n           * @type {EventTarget~Event}\n           */\n          this.trigger('tap');\n          // It may be good to copy the touchend event object and change the\n          // type to tap, if the other event properties aren't exact after\n          // Events.fixEvent runs (e.g. event.target)\n        }\n      }\n    });\n  };\n\n  /**\n   * This function reports user activity whenever touch events happen. This can get\n   * turned off by any sub-components that wants touch events to act another way.\n   *\n   * Report user touch activity when touch events occur. User activity gets used to\n   * determine when controls should show/hide. It is simple when it comes to mouse\n   * events, because any mouse event should show the controls. So we capture mouse\n   * events that bubble up to the player and report activity when that happens.\n   * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n   * controls. So touch events can't help us at the player level either.\n   *\n   * User activity gets checked asynchronously. So what could happen is a tap event\n   * on the video turns the controls off. Then the `touchend` event bubbles up to\n   * the player. Which, if it reported user activity, would turn the controls right\n   * back on. We also don't want to completely block touch events from bubbling up.\n   * Furthermore a `touchmove` event and anything other than a tap, should not turn\n   * controls back on.\n   *\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchend\n   * @listens Component#touchcancel\n   */\n\n\n  Component.prototype.enableTouchActivity = function enableTouchActivity() {\n    // Don't continue if the root player doesn't support reporting user activity\n    if (!this.player() || !this.player().reportUserActivity) {\n      return;\n    }\n\n    // listener for reporting that the user is active\n    var report = bind(this.player(), this.player().reportUserActivity);\n\n    var touchHolding = void 0;\n\n    this.on('touchstart', function () {\n      report();\n      // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n      this.clearInterval(touchHolding);\n      // report at the same interval as activityCheck\n      touchHolding = this.setInterval(report, 250);\n    });\n\n    var touchEnd = function touchEnd(event) {\n      report();\n      // stop the interval that maintains activity if the touch is holding\n      this.clearInterval(touchHolding);\n    };\n\n    this.on('touchmove', report);\n    this.on('touchend', touchEnd);\n    this.on('touchcancel', touchEnd);\n  };\n\n  /**\n   * A callback that has no parameters and is bound into `Component`s context.\n   *\n   * @callback Component~GenericCallback\n   * @this Component\n   */\n\n  /**\n   * Creates a function that runs after an `x` millisecond timeout. This function is a\n   * wrapper around `window.setTimeout`. There are a few reasons to use this one\n   * instead though:\n   * 1. It gets cleared via  {@link Component#clearTimeout} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n   *\n   * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n   *         will cause its dispose listener not to get cleaned up! Please use\n   *         {@link Component#clearTimeout} or {@link Component#dispose} instead.\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function that will be run after `timeout`.\n   *\n   * @param {number} timeout\n   *        Timeout in milliseconds to delay before executing the specified function.\n   *\n   * @return {number}\n   *         Returns a timeout ID that gets used to identify the timeout. It can also\n   *         get used in {@link Component#clearTimeout} to clear the timeout that\n   *         was set.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n   */\n\n\n  Component.prototype.setTimeout = function setTimeout(fn, timeout) {\n    var _this2 = this;\n\n    // declare as variables so they are properly available in timeout function\n    // eslint-disable-next-line\n    var timeoutId, disposeFn;\n\n    fn = bind(this, fn);\n\n    timeoutId = window.setTimeout(function () {\n      _this2.off('dispose', disposeFn);\n      fn();\n    }, timeout);\n\n    disposeFn = function disposeFn() {\n      return _this2.clearTimeout(timeoutId);\n    };\n\n    disposeFn.guid = 'vjs-timeout-' + timeoutId;\n\n    this.on('dispose', disposeFn);\n\n    return timeoutId;\n  };\n\n  /**\n   * Clears a timeout that gets created via `window.setTimeout` or\n   * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n   * use this function instead of `window.clearTimout`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} timeoutId\n   *        The id of the timeout to clear. The return value of\n   *        {@link Component#setTimeout} or `window.setTimeout`.\n   *\n   * @return {number}\n   *         Returns the timeout id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n   */\n\n\n  Component.prototype.clearTimeout = function clearTimeout(timeoutId) {\n    window.clearTimeout(timeoutId);\n\n    var disposeFn = function disposeFn() {};\n\n    disposeFn.guid = 'vjs-timeout-' + timeoutId;\n\n    this.off('dispose', disposeFn);\n\n    return timeoutId;\n  };\n\n  /**\n   * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n   * around `window.setInterval`. There are a few reasons to use this one instead though.\n   * 1. It gets cleared via  {@link Component#clearInterval} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will be a {@link Component~GenericCallback}\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function to run every `x` seconds.\n   *\n   * @param {number} interval\n   *        Execute the specified function every `x` milliseconds.\n   *\n   * @return {number}\n   *         Returns an id that can be used to identify the interval. It can also be be used in\n   *         {@link Component#clearInterval} to clear the interval.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n   */\n\n\n  Component.prototype.setInterval = function setInterval(fn, interval) {\n    var _this3 = this;\n\n    fn = bind(this, fn);\n\n    var intervalId = window.setInterval(fn, interval);\n\n    var disposeFn = function disposeFn() {\n      return _this3.clearInterval(intervalId);\n    };\n\n    disposeFn.guid = 'vjs-interval-' + intervalId;\n\n    this.on('dispose', disposeFn);\n\n    return intervalId;\n  };\n\n  /**\n   * Clears an interval that gets created via `window.setInterval` or\n   * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}\n   * use this function instead of `window.clearInterval`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} intervalId\n   *        The id of the interval to clear. The return value of\n   *        {@link Component#setInterval} or `window.setInterval`.\n   *\n   * @return {number}\n   *         Returns the interval id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n   */\n\n\n  Component.prototype.clearInterval = function clearInterval(intervalId) {\n    window.clearInterval(intervalId);\n\n    var disposeFn = function disposeFn() {};\n\n    disposeFn.guid = 'vjs-interval-' + intervalId;\n\n    this.off('dispose', disposeFn);\n\n    return intervalId;\n  };\n\n  /**\n   * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n   * with a few extra bonuses:\n   *\n   * - Supports browsers that do not support rAF by falling back to\n   *   {@link Component#setTimeout}.\n   *\n   * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n   *   bound to the component).\n   *\n   * - Automatic cancellation of the rAF callback is handled if the component\n   *   is disposed before it is called.\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   *\n   * @return {number}\n   *         Returns an rAF ID that gets used to identify the timeout. It can\n   *         also be used in {@link Component#cancelAnimationFrame} to cancel\n   *         the animation frame callback.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n   */\n\n\n  Component.prototype.requestAnimationFrame = function requestAnimationFrame(fn) {\n    var _this4 = this;\n\n    // declare as variables so they are properly available in rAF function\n    // eslint-disable-next-line\n    var id, disposeFn;\n\n    if (this.supportsRaf_) {\n      fn = bind(this, fn);\n\n      id = window.requestAnimationFrame(function () {\n        _this4.off('dispose', disposeFn);\n        fn();\n      });\n\n      disposeFn = function disposeFn() {\n        return _this4.cancelAnimationFrame(id);\n      };\n\n      disposeFn.guid = 'vjs-raf-' + id;\n      this.on('dispose', disposeFn);\n\n      return id;\n    }\n\n    // Fall back to using a timer.\n    return this.setTimeout(fn, 1000 / 60);\n  };\n\n  /**\n   * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n   * (rAF).\n   *\n   * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n   * use this function instead of `window.cancelAnimationFrame`. If you don't,\n   * your dispose listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} id\n   *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n   *\n   * @return {number}\n   *         Returns the rAF ID that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n   */\n\n\n  Component.prototype.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    if (this.supportsRaf_) {\n      window.cancelAnimationFrame(id);\n\n      var disposeFn = function disposeFn() {};\n\n      disposeFn.guid = 'vjs-raf-' + id;\n\n      this.off('dispose', disposeFn);\n\n      return id;\n    }\n\n    // Fall back to using a timer.\n    return this.clearTimeout(id);\n  };\n\n  /**\n   * Register a `Component` with `videojs` given the name and the component.\n   *\n   * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n   *         should be registered using {@link Tech.registerTech} or\n   *         {@link videojs:videojs.registerTech}.\n   *\n   * > NOTE: This function can also be seen on videojs as\n   *         {@link videojs:videojs.registerComponent}.\n   *\n   * @param {string} name\n   *        The name of the `Component` to register.\n   *\n   * @param {Component} ComponentToRegister\n   *        The `Component` class to register.\n   *\n   * @return {Component}\n   *         The `Component` that was registered.\n   */\n\n\n  Component.registerComponent = function registerComponent(name, ComponentToRegister) {\n    if (typeof name !== 'string' || !name) {\n      throw new Error('Illegal component name, \"' + name + '\"; must be a non-empty string.');\n    }\n\n    var Tech = Component.getComponent('Tech');\n\n    // We need to make sure this check is only done if Tech has been registered.\n    var isTech = Tech && Tech.isTech(ComponentToRegister);\n    var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);\n\n    if (isTech || !isComp) {\n      var reason = void 0;\n\n      if (isTech) {\n        reason = 'techs must be registered using Tech.registerTech()';\n      } else {\n        reason = 'must be a Component subclass';\n      }\n\n      throw new Error('Illegal component, \"' + name + '\"; ' + reason + '.');\n    }\n\n    name = toTitleCase(name);\n\n    if (!Component.components_) {\n      Component.components_ = {};\n    }\n\n    var Player = Component.getComponent('Player');\n\n    if (name === 'Player' && Player && Player.players) {\n      var players = Player.players;\n      var playerNames = Object.keys(players);\n\n      // If we have players that were disposed, then their name will still be\n      // in Players.players. So, we must loop through and verify that the value\n      // for each item is not null. This allows registration of the Player component\n      // after all players have been disposed or before any were created.\n      if (players && playerNames.length > 0 && playerNames.map(function (pname) {\n        return players[pname];\n      }).every(Boolean)) {\n        throw new Error('Can not register Player component after player has been created.');\n      }\n    }\n\n    Component.components_[name] = ComponentToRegister;\n\n    return ComponentToRegister;\n  };\n\n  /**\n   * Get a `Component` based on the name it was registered with.\n   *\n   * @param {string} name\n   *        The Name of the component to get.\n   *\n   * @return {Component}\n   *         The `Component` that got registered under the given name.\n   *\n   * @deprecated In `videojs` 6 this will not return `Component`s that were not\n   *             registered using {@link Component.registerComponent}. Currently we\n   *             check the global `videojs` object for a `Component` name and\n   *             return that if it exists.\n   */\n\n\n  Component.getComponent = function getComponent(name) {\n    if (!name) {\n      return;\n    }\n\n    name = toTitleCase(name);\n\n    if (Component.components_ && Component.components_[name]) {\n      return Component.components_[name];\n    }\n  };\n\n  return Component;\n}();\n\n/**\n * Whether or not this component supports `requestAnimationFrame`.\n *\n * This is exposed primarily for testing purposes.\n *\n * @private\n * @type {Boolean}\n */\n\n\nComponent.prototype.supportsRaf_ = typeof window.requestAnimationFrame === 'function' && typeof window.cancelAnimationFrame === 'function';\n\nComponent.registerComponent('Component', Component);\n\n/**\n * @file time-ranges.js\n * @module time-ranges\n */\n\n/**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @function time-ranges:indexFunction\n *\n * @param {number} [index=0]\n *        The range number to return the time for.\n *\n * @return {number}\n *         The time that offset at the specified index.\n *\n * @depricated index must be set to a value, in the future this will throw an error.\n */\n\n/**\n * An object that contains ranges of time for various reasons.\n *\n * @typedef {Object} TimeRange\n *\n * @property {number} length\n *           The number of time ranges represented by this Object\n *\n * @property {time-ranges:indexFunction} start\n *           Returns the time offset at which a specified time range begins.\n *\n * @property {time-ranges:indexFunction} end\n *           Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n/**\n * Check if any of the time ranges are over the maximum index.\n *\n * @param {string} fnName\n *        The function name to use for logging\n *\n * @param {number} index\n *        The index to check\n *\n * @param {number} maxIndex\n *        The maximum possible index\n *\n * @throws {Error} if the timeRanges provided are over the maxIndex\n */\nfunction rangeCheck(fnName, index, maxIndex) {\n  if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n    throw new Error('Failed to execute \\'' + fnName + '\\' on \\'TimeRanges\\': The index provided (' + index + ') is non-numeric or out of bounds (0-' + maxIndex + ').');\n  }\n}\n\n/**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @param {string} fnName\n *        The function name to use for logging\n *\n * @param {string} valueIndex\n *        The proprety that should be used to get the time. should be 'start' or 'end'\n *\n * @param {Array} ranges\n *        An array of time ranges\n *\n * @param {Array} [rangeIndex=0]\n *        The index to start the search at\n *\n * @return {number}\n *         The time that offset at the specified index.\n *\n *\n * @depricated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws {Error} if rangeIndex is more than the length of ranges\n */\nfunction getRange(fnName, valueIndex, ranges, rangeIndex) {\n  rangeCheck(fnName, rangeIndex, ranges.length - 1);\n  return ranges[rangeIndex][valueIndex];\n}\n\n/**\n * Create a time range object given ranges of time.\n *\n * @param {Array} [ranges]\n *        An array of time ranges.\n */\nfunction createTimeRangesObj(ranges) {\n  if (ranges === undefined || ranges.length === 0) {\n    return {\n      length: 0,\n      start: function start() {\n        throw new Error('This TimeRanges object is empty');\n      },\n      end: function end() {\n        throw new Error('This TimeRanges object is empty');\n      }\n    };\n  }\n  return {\n    length: ranges.length,\n    start: getRange.bind(null, 'start', 0, ranges),\n    end: getRange.bind(null, 'end', 1, ranges)\n  };\n}\n\n/**\n * Should create a fake `TimeRange` object which mimics an HTML5 time range instance.\n *\n * @param {number|Array} start\n *        The start of a single range or an array of ranges\n *\n * @param {number} end\n *        The end of a single range.\n *\n * @private\n */\nfunction createTimeRanges(start, end) {\n  if (Array.isArray(start)) {\n    return createTimeRangesObj(start);\n  } else if (start === undefined || end === undefined) {\n    return createTimeRangesObj();\n  }\n  return createTimeRangesObj([[start, end]]);\n}\n\n/**\n * @file buffer.js\n * @module buffer\n */\n/**\n * Compute the percentage of the media that has been buffered.\n *\n * @param {TimeRange} buffered\n *        The current `TimeRange` object representing buffered time ranges\n *\n * @param {number} duration\n *        Total duration of the media\n *\n * @return {number}\n *         Percent buffered of the total duration in decimal form.\n */\nfunction bufferedPercent(buffered, duration) {\n  var bufferedDuration = 0;\n  var start = void 0;\n  var end = void 0;\n\n  if (!duration) {\n    return 0;\n  }\n\n  if (!buffered || !buffered.length) {\n    buffered = createTimeRanges(0, 0);\n  }\n\n  for (var i = 0; i < buffered.length; i++) {\n    start = buffered.start(i);\n    end = buffered.end(i);\n\n    // buffered end can be bigger than duration by a very small fraction\n    if (end > duration) {\n      end = duration;\n    }\n\n    bufferedDuration += end - start;\n  }\n\n  return bufferedDuration / duration;\n}\n\n/**\n * @file fullscreen-api.js\n * @module fullscreen-api\n * @private\n */\n/**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\nvar FullscreenApi = {};\n\n// browser API methods\nvar apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror'],\n// WebKit\n['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror'],\n// Old WebKit (Safari 5.1)\n['webkitRequestFullScreen', 'webkitCancelFullScreen', 'webkitCurrentFullScreenElement', 'webkitCancelFullScreen', 'webkitfullscreenchange', 'webkitfullscreenerror'],\n// Mozilla\n['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror'],\n// Microsoft\n['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError']];\n\nvar specApi = apiMap[0];\nvar browserApi = void 0;\n\n// determine the supported set of functions\nfor (var i = 0; i < apiMap.length; i++) {\n  // check for exitFullscreen function\n  if (apiMap[i][1] in document) {\n    browserApi = apiMap[i];\n    break;\n  }\n}\n\n// map the browser API names to the spec API names\nif (browserApi) {\n  for (var _i = 0; _i < browserApi.length; _i++) {\n    FullscreenApi[specApi[_i]] = browserApi[_i];\n  }\n}\n\n/**\n * @file media-error.js\n */\n/**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n *        This can be of multiple types:\n *        - number: should be a standard error code\n *        - string: an error message (the code will be 0)\n *        - Object: arbitrary properties\n *        - `MediaError` (native): used to populate a video.js `MediaError` object\n *        - `MediaError` (video.js): will return itself if it's already a\n *          video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\nfunction MediaError(value) {\n\n  // Allow redundant calls to this constructor to avoid having `instanceof`\n  // checks peppered around the code.\n  if (value instanceof MediaError) {\n    return value;\n  }\n\n  if (typeof value === 'number') {\n    this.code = value;\n  } else if (typeof value === 'string') {\n    // default code is zero, so this is a custom error\n    this.message = value;\n  } else if (isObject(value)) {\n\n    // We assign the `code` property manually because native `MediaError` objects\n    // do not expose it as an own/enumerable property of the object.\n    if (typeof value.code === 'number') {\n      this.code = value.code;\n    }\n\n    assign(this, value);\n  }\n\n  if (!this.message) {\n    this.message = MediaError.defaultMessages[this.code] || '';\n  }\n}\n\n/**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\nMediaError.prototype.code = 0;\n\n/**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\nMediaError.prototype.message = '';\n\n/**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\nMediaError.prototype.status = null;\n\n/**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_CUSTOM\n * @property {string} 2 - MEDIA_ERR_ABORTED\n * @property {string} 3 - MEDIA_ERR_NETWORK\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\nMediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n\n/**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\nMediaError.defaultMessages = {\n  1: 'You aborted the media playback',\n  2: 'A network error caused the media download to fail part-way.',\n  3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n  4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n  5: 'The media is encrypted and we do not have the keys to decrypt it.'\n};\n\n// Add types as properties on MediaError\n// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\nfor (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n  MediaError[MediaError.errorTypes[errNum]] = errNum;\n  // values should be accessible on both the class and instance\n  MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n}\n\n/**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param  {Object}  value\n *         An object that may or may not be `Promise`-like.\n *\n * @return {Boolean}\n *         Whether or not the object is `Promise`-like.\n */\nfunction isPromise(value) {\n  return value !== undefined && value !== null && typeof value.then === 'function';\n}\n\n/**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param  {Object} value\n *         An object that may or may not be `Promise`-like.\n */\nfunction silencePromise(value) {\n  if (isPromise(value)) {\n    value.then(null, function (e) {});\n  }\n}\n\n/**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n/**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n *        The text track to query.\n *\n * @return {Object}\n *         A serializable javascript representation of the TextTrack.\n * @private\n */\nvar trackToJson_ = function trackToJson_(track) {\n  var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {\n\n    if (track[prop]) {\n      acc[prop] = track[prop];\n    }\n\n    return acc;\n  }, {\n    cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n      return {\n        startTime: cue.startTime,\n        endTime: cue.endTime,\n        text: cue.text,\n        id: cue.id\n      };\n    })\n  });\n\n  return ret;\n};\n\n/**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param {Tech} tech\n *        The tech object to query\n *\n * @return {Array}\n *         A serializable javascript representation of the {@link Tech}s\n *         {@link TextTrackList}.\n */\nvar textTracksToJson = function textTracksToJson(tech) {\n\n  var trackEls = tech.$$('track');\n\n  var trackObjs = Array.prototype.map.call(trackEls, function (t) {\n    return t.track;\n  });\n  var tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n    var json = trackToJson_(trackEl.track);\n\n    if (trackEl.src) {\n      json.src = trackEl.src;\n    }\n    return json;\n  });\n\n  return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n    return trackObjs.indexOf(track) === -1;\n  }).map(trackToJson_));\n};\n\n/**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n *        An array of `TextTrack` representation objects, like those that would be\n *        produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n *        The `Tech` to create the `TextTrack`s on.\n */\nvar jsonToTextTracks = function jsonToTextTracks(json, tech) {\n  json.forEach(function (track) {\n    var addedTrack = tech.addRemoteTextTrack(track).track;\n\n    if (!track.src && track.cues) {\n      track.cues.forEach(function (cue) {\n        return addedTrack.addCue(cue);\n      });\n    }\n  });\n\n  return tech.textTracks();\n};\n\nvar textTrackConverter = { textTracksToJson: textTracksToJson, jsonToTextTracks: jsonToTextTracks, trackToJson_: trackToJson_ };\n\n/**\n * @file modal-dialog.js\n */\nvar MODAL_CLASS_NAME = 'vjs-modal-dialog';\nvar ESC = 27;\n\n/**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n\nvar ModalDialog = function (_Component) {\n  inherits(ModalDialog, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Mixed} [options.content=undefined]\n   *        Provide customized content for this modal.\n   *\n   * @param {string} [options.description]\n   *        A text description for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.fillAlways=false]\n   *        Normally, modals are automatically filled only the first time\n   *        they open. This tells the modal to refresh its content\n   *        every time it opens.\n   *\n   * @param {string} [options.label]\n   *        A text label for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.temporary=true]\n   *        If `true`, the modal can only be opened once; it will be\n   *        disposed as soon as it's closed.\n   *\n   * @param {boolean} [options.uncloseable=false]\n   *        If `true`, the user will not be able to close the modal\n   *        through the UI in the normal ways. Programmatic closing is\n   *        still possible.\n   */\n  function ModalDialog(player, options) {\n    classCallCheck(this, ModalDialog);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;\n\n    _this.closeable(!_this.options_.uncloseable);\n    _this.content(_this.options_.content);\n\n    // Make sure the contentEl is defined AFTER any children are initialized\n    // because we only want the contents of the modal in the contentEl\n    // (not the UI elements like the close button).\n    _this.contentEl_ = createEl('div', {\n      className: MODAL_CLASS_NAME + '-content'\n    }, {\n      role: 'document'\n    });\n\n    _this.descEl_ = createEl('p', {\n      className: MODAL_CLASS_NAME + '-description vjs-control-text',\n      id: _this.el().getAttribute('aria-describedby')\n    });\n\n    textContent(_this.descEl_, _this.description());\n    _this.el_.appendChild(_this.descEl_);\n    _this.el_.appendChild(_this.contentEl_);\n    return _this;\n  }\n\n  /**\n   * Create the `ModalDialog`'s DOM element\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  ModalDialog.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      tabIndex: -1\n    }, {\n      'aria-describedby': this.id() + '_description',\n      'aria-hidden': 'true',\n      'aria-label': this.label(),\n      'role': 'dialog'\n    });\n  };\n\n  ModalDialog.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.descEl_ = null;\n    this.previouslyActiveEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  ModalDialog.prototype.buildCSSClass = function buildCSSClass() {\n    return MODAL_CLASS_NAME + ' vjs-hidden ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Handles `keydown` events on the document, looking for ESC, which closes\n   * the modal.\n   *\n   * @param {EventTarget~Event} e\n   *        The keypress that triggered this event.\n   *\n   * @listens keydown\n   */\n\n\n  ModalDialog.prototype.handleKeyPress = function handleKeyPress(e) {\n    if (e.which === ESC && this.closeable()) {\n      this.close();\n    }\n  };\n\n  /**\n   * Returns the label string for this modal. Primarily used for accessibility.\n   *\n   * @return {string}\n   *         the localized or raw label of this modal.\n   */\n\n\n  ModalDialog.prototype.label = function label() {\n    return this.localize(this.options_.label || 'Modal Window');\n  };\n\n  /**\n   * Returns the description string for this modal. Primarily used for\n   * accessibility.\n   *\n   * @return {string}\n   *         The localized or raw description of this modal.\n   */\n\n\n  ModalDialog.prototype.description = function description() {\n    var desc = this.options_.description || this.localize('This is a modal window.');\n\n    // Append a universal closeability message if the modal is closeable.\n    if (this.closeable()) {\n      desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n    }\n\n    return desc;\n  };\n\n  /**\n   * Opens the modal.\n   *\n   * @fires ModalDialog#beforemodalopen\n   * @fires ModalDialog#modalopen\n   */\n\n\n  ModalDialog.prototype.open = function open() {\n    if (!this.opened_) {\n      var player = this.player();\n\n      /**\n        * Fired just before a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#beforemodalopen\n        * @type {EventTarget~Event}\n        */\n      this.trigger('beforemodalopen');\n      this.opened_ = true;\n\n      // Fill content if the modal has never opened before and\n      // never been filled.\n      if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n        this.fill();\n      }\n\n      // If the player was playing, pause it and take note of its previously\n      // playing state.\n      this.wasPlaying_ = !player.paused();\n\n      if (this.options_.pauseOnOpen && this.wasPlaying_) {\n        player.pause();\n      }\n\n      if (this.closeable()) {\n        this.on(this.el_.ownerDocument, 'keydown', bind(this, this.handleKeyPress));\n      }\n\n      // Hide controls and note if they were enabled.\n      this.hadControls_ = player.controls();\n      player.controls(false);\n\n      this.show();\n      this.conditionalFocus_();\n      this.el().setAttribute('aria-hidden', 'false');\n\n      /**\n        * Fired just after a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#modalopen\n        * @type {EventTarget~Event}\n        */\n      this.trigger('modalopen');\n      this.hasBeenOpened_ = true;\n    }\n  };\n\n  /**\n   * If the `ModalDialog` is currently open or closed.\n   *\n   * @param  {boolean} [value]\n   *         If given, it will open (`true`) or close (`false`) the modal.\n   *\n   * @return {boolean}\n   *         the current open state of the modaldialog\n   */\n\n\n  ModalDialog.prototype.opened = function opened(value) {\n    if (typeof value === 'boolean') {\n      this[value ? 'open' : 'close']();\n    }\n    return this.opened_;\n  };\n\n  /**\n   * Closes the modal, does nothing if the `ModalDialog` is\n   * not open.\n   *\n   * @fires ModalDialog#beforemodalclose\n   * @fires ModalDialog#modalclose\n   */\n\n\n  ModalDialog.prototype.close = function close() {\n    if (!this.opened_) {\n      return;\n    }\n    var player = this.player();\n\n    /**\n      * Fired just before a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#beforemodalclose\n      * @type {EventTarget~Event}\n      */\n    this.trigger('beforemodalclose');\n    this.opened_ = false;\n\n    if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n      player.play();\n    }\n\n    if (this.closeable()) {\n      this.off(this.el_.ownerDocument, 'keydown', bind(this, this.handleKeyPress));\n    }\n\n    if (this.hadControls_) {\n      player.controls(true);\n    }\n\n    this.hide();\n    this.el().setAttribute('aria-hidden', 'true');\n\n    /**\n      * Fired just after a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#modalclose\n      * @type {EventTarget~Event}\n      */\n    this.trigger('modalclose');\n    this.conditionalBlur_();\n\n    if (this.options_.temporary) {\n      this.dispose();\n    }\n  };\n\n  /**\n   * Check to see if the `ModalDialog` is closeable via the UI.\n   *\n   * @param  {boolean} [value]\n   *         If given as a boolean, it will set the `closeable` option.\n   *\n   * @return {boolean}\n   *         Returns the final value of the closable option.\n   */\n\n\n  ModalDialog.prototype.closeable = function closeable(value) {\n    if (typeof value === 'boolean') {\n      var closeable = this.closeable_ = !!value;\n      var close = this.getChild('closeButton');\n\n      // If this is being made closeable and has no close button, add one.\n      if (closeable && !close) {\n\n        // The close button should be a child of the modal - not its\n        // content element, so temporarily change the content element.\n        var temp = this.contentEl_;\n\n        this.contentEl_ = this.el_;\n        close = this.addChild('closeButton', { controlText: 'Close Modal Dialog' });\n        this.contentEl_ = temp;\n        this.on(close, 'close', this.close);\n      }\n\n      // If this is being made uncloseable and has a close button, remove it.\n      if (!closeable && close) {\n        this.off(close, 'close', this.close);\n        this.removeChild(close);\n        close.dispose();\n      }\n    }\n    return this.closeable_;\n  };\n\n  /**\n   * Fill the modal's content element with the modal's \"content\" option.\n   * The content element will be emptied before this change takes place.\n   */\n\n\n  ModalDialog.prototype.fill = function fill() {\n    this.fillWith(this.content());\n  };\n\n  /**\n   * Fill the modal's content element with arbitrary content.\n   * The content element will be emptied before this change takes place.\n   *\n   * @fires ModalDialog#beforemodalfill\n   * @fires ModalDialog#modalfill\n   *\n   * @param {Mixed} [content]\n   *        The same rules apply to this as apply to the `content` option.\n   */\n\n\n  ModalDialog.prototype.fillWith = function fillWith(content) {\n    var contentEl = this.contentEl();\n    var parentEl = contentEl.parentNode;\n    var nextSiblingEl = contentEl.nextSibling;\n\n    /**\n     * Fired just before a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#beforemodalfill\n     * @type {EventTarget~Event}\n     */\n    this.trigger('beforemodalfill');\n    this.hasBeenFilled_ = true;\n\n    // Detach the content element from the DOM before performing\n    // manipulation to avoid modifying the live DOM multiple times.\n    parentEl.removeChild(contentEl);\n    this.empty();\n    insertContent(contentEl, content);\n    /**\n     * Fired just after a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#modalfill\n     * @type {EventTarget~Event}\n     */\n    this.trigger('modalfill');\n\n    // Re-inject the re-filled content element.\n    if (nextSiblingEl) {\n      parentEl.insertBefore(contentEl, nextSiblingEl);\n    } else {\n      parentEl.appendChild(contentEl);\n    }\n\n    // make sure that the close button is last in the dialog DOM\n    var closeButton = this.getChild('closeButton');\n\n    if (closeButton) {\n      parentEl.appendChild(closeButton.el_);\n    }\n  };\n\n  /**\n   * Empties the content element. This happens anytime the modal is filled.\n   *\n   * @fires ModalDialog#beforemodalempty\n   * @fires ModalDialog#modalempty\n   */\n\n\n  ModalDialog.prototype.empty = function empty() {\n    /**\n     * Fired just before a `ModalDialog` is emptied.\n     *\n     * @event ModalDialog#beforemodalempty\n     * @type {EventTarget~Event}\n     */\n    this.trigger('beforemodalempty');\n    emptyEl(this.contentEl());\n\n    /**\n     * Fired just after a `ModalDialog` is emptied.\n     *\n     * @event ModalDialog#modalempty\n     * @type {EventTarget~Event}\n     */\n    this.trigger('modalempty');\n  };\n\n  /**\n   * Gets or sets the modal content, which gets normalized before being\n   * rendered into the DOM.\n   *\n   * This does not update the DOM or fill the modal, but it is called during\n   * that process.\n   *\n   * @param  {Mixed} [value]\n   *         If defined, sets the internal content value to be used on the\n   *         next call(s) to `fill`. This value is normalized before being\n   *         inserted. To \"clear\" the internal content value, pass `null`.\n   *\n   * @return {Mixed}\n   *         The current content of the modal dialog\n   */\n\n\n  ModalDialog.prototype.content = function content(value) {\n    if (typeof value !== 'undefined') {\n      this.content_ = value;\n    }\n    return this.content_;\n  };\n\n  /**\n   * conditionally focus the modal dialog if focus was previously on the player.\n   *\n   * @private\n   */\n\n\n  ModalDialog.prototype.conditionalFocus_ = function conditionalFocus_() {\n    var activeEl = document.activeElement;\n    var playerEl = this.player_.el_;\n\n    this.previouslyActiveEl_ = null;\n\n    if (playerEl.contains(activeEl) || playerEl === activeEl) {\n      this.previouslyActiveEl_ = activeEl;\n\n      this.focus();\n\n      this.on(document, 'keydown', this.handleKeyDown);\n    }\n  };\n\n  /**\n   * conditionally blur the element and refocus the last focused element\n   *\n   * @private\n   */\n\n\n  ModalDialog.prototype.conditionalBlur_ = function conditionalBlur_() {\n    if (this.previouslyActiveEl_) {\n      this.previouslyActiveEl_.focus();\n      this.previouslyActiveEl_ = null;\n    }\n\n    this.off(document, 'keydown', this.handleKeyDown);\n  };\n\n  /**\n   * Keydown handler. Attached when modal is focused.\n   *\n   * @listens keydown\n   */\n\n\n  ModalDialog.prototype.handleKeyDown = function handleKeyDown(event) {\n    // exit early if it isn't a tab key\n    if (event.which !== 9) {\n      return;\n    }\n\n    var focusableEls = this.focusableEls_();\n    var activeEl = this.el_.querySelector(':focus');\n    var focusIndex = void 0;\n\n    for (var i = 0; i < focusableEls.length; i++) {\n      if (activeEl === focusableEls[i]) {\n        focusIndex = i;\n        break;\n      }\n    }\n\n    if (document.activeElement === this.el_) {\n      focusIndex = 0;\n    }\n\n    if (event.shiftKey && focusIndex === 0) {\n      focusableEls[focusableEls.length - 1].focus();\n      event.preventDefault();\n    } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n      focusableEls[0].focus();\n      event.preventDefault();\n    }\n  };\n\n  /**\n   * get all focusable elements\n   *\n   * @private\n   */\n\n\n  ModalDialog.prototype.focusableEls_ = function focusableEls_() {\n    var allChildren = this.el_.querySelectorAll('*');\n\n    return Array.prototype.filter.call(allChildren, function (child) {\n      return (child instanceof window.HTMLAnchorElement || child instanceof window.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window.HTMLInputElement || child instanceof window.HTMLSelectElement || child instanceof window.HTMLTextAreaElement || child instanceof window.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window.HTMLIFrameElement || child instanceof window.HTMLObjectElement || child instanceof window.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n    });\n  };\n\n  return ModalDialog;\n}(Component);\n\n/**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n\n\nModalDialog.prototype.options_ = {\n  pauseOnOpen: true,\n  temporary: true\n};\n\nComponent.registerComponent('ModalDialog', ModalDialog);\n\n/**\n * @file track-list.js\n */\n/**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n\nvar TrackList = function (_EventTarget) {\n  inherits(TrackList, _EventTarget);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Track[]} tracks\n   *        A list of tracks to initialize the list with.\n   *\n   * @param {Object} [list]\n   *        The child object with inheritance done manually for ie8.\n   *\n   * @abstract\n   */\n  function TrackList() {\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n\n    var _ret;\n\n    var list = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : null;\n    classCallCheck(this, TrackList);\n\n    var _this = possibleConstructorReturn(this, _EventTarget.call(this));\n\n    if (!list) {\n      list = _this; // eslint-disable-line\n      if (IS_IE8) {\n        list = document.createElement('custom');\n        for (var prop in TrackList.prototype) {\n          if (prop !== 'constructor') {\n            list[prop] = TrackList.prototype[prop];\n          }\n        }\n      }\n    }\n\n    list.tracks_ = [];\n\n    /**\n     * @memberof TrackList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n    Object.defineProperty(list, 'length', {\n      get: function get$$1() {\n        return this.tracks_.length;\n      }\n    });\n\n    for (var i = 0; i < tracks.length; i++) {\n      list.addTrack(tracks[i]);\n    }\n\n    // must return the object, as for ie8 it will not be this\n    // but a reference to a document object\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a {@link Track} to the `TrackList`\n   *\n   * @param {Track} track\n   *        The audio, video, or text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  TrackList.prototype.addTrack = function addTrack(track) {\n    var index = this.tracks_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get$$1() {\n          return this.tracks_[index];\n        }\n      });\n    }\n\n    // Do not add duplicate tracks\n    if (this.tracks_.indexOf(track) === -1) {\n      this.tracks_.push(track);\n      /**\n       * Triggered when a track is added to a track list.\n       *\n       * @event TrackList#addtrack\n       * @type {EventTarget~Event}\n       * @property {Track} track\n       *           A reference to track that was added.\n       */\n      this.trigger({\n        track: track,\n        type: 'addtrack'\n      });\n    }\n  };\n\n  /**\n   * Remove a {@link Track} from the `TrackList`\n   *\n   * @param {Track} rtrack\n   *        The audio, video, or text track to remove from the list.\n   *\n   * @fires TrackList#removetrack\n   */\n\n\n  TrackList.prototype.removeTrack = function removeTrack(rtrack) {\n    var track = void 0;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      if (this[i] === rtrack) {\n        track = this[i];\n        if (track.off) {\n          track.off();\n        }\n\n        this.tracks_.splice(i, 1);\n\n        break;\n      }\n    }\n\n    if (!track) {\n      return;\n    }\n\n    /**\n     * Triggered when a track is removed from track list.\n     *\n     * @event TrackList#removetrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was removed.\n     */\n    this.trigger({\n      track: track,\n      type: 'removetrack'\n    });\n  };\n\n  /**\n   * Get a Track from the TrackList by a tracks id\n   *\n   * @param {String} id - the id of the track to get\n   * @method getTrackById\n   * @return {Track}\n   * @private\n   */\n\n\n  TrackList.prototype.getTrackById = function getTrackById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var track = this[i];\n\n      if (track.id === id) {\n        result = track;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TrackList;\n}(EventTarget);\n\n/**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {EventTarget~Event}\n */\n\n/**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n\n\nTrackList.prototype.allowedEvents_ = {\n  change: 'change',\n  addtrack: 'addtrack',\n  removetrack: 'removetrack'\n};\n\n// emulate attribute EventHandler support to allow for feature detection\nfor (var event in TrackList.prototype.allowedEvents_) {\n  TrackList.prototype['on' + event] = null;\n}\n\n/**\n * @file audio-track-list.js\n */\n/**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n *        list to work on\n *\n * @param {AudioTrack} track\n *        The track to skip\n *\n * @private\n */\nvar disableOthers = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    }\n    // another audio track is enabled, disable it\n    list[i].enabled = false;\n  }\n};\n\n/**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n\nvar AudioTrackList = function (_TrackList) {\n  inherits(AudioTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {AudioTrack[]} [tracks=[]]\n   *        A list of `AudioTrack` to instantiate the list with.\n   */\n  function AudioTrackList() {\n    var _this, _ret;\n\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, AudioTrackList);\n\n    var list = void 0;\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].enabled) {\n        disableOthers(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    // IE8 forces us to implement inheritance ourselves\n    // as it does not support Object.defineProperty properly\n    if (IS_IE8) {\n      list = document.createElement('custom');\n      for (var prop in TrackList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TrackList.prototype[prop];\n        }\n      }\n      for (var _prop in AudioTrackList.prototype) {\n        if (_prop !== 'constructor') {\n          list[_prop] = AudioTrackList.prototype[_prop];\n        }\n      }\n    }\n\n    list = (_this = possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);\n    list.changing_ = false;\n\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add an {@link AudioTrack} to the `AudioTrackList`.\n   *\n   * @param {AudioTrack} track\n   *        The AudioTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  AudioTrackList.prototype.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.enabled) {\n      disableOthers(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track);\n    // native tracks don't have this\n    if (!track.addEventListener) {\n      return;\n    }\n\n    /**\n     * @listens AudioTrack#enabledchange\n     * @fires TrackList#change\n     */\n    track.addEventListener('enabledchange', function () {\n      // when we are disabling other tracks (since we don't support\n      // more than one track at a time) we will set changing_\n      // to true so that we don't trigger additional change events\n      if (_this2.changing_) {\n        return;\n      }\n      _this2.changing_ = true;\n      disableOthers(_this2, track);\n      _this2.changing_ = false;\n      _this2.trigger('change');\n    });\n  };\n\n  return AudioTrackList;\n}(TrackList);\n\n/**\n * @file video-track-list.js\n */\n/**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n *        list to work on\n *\n * @param {VideoTrack} track\n *        The track to skip\n *\n * @private\n */\nvar disableOthers$1 = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    }\n    // another video track is enabled, disable it\n    list[i].selected = false;\n  }\n};\n\n/**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n\nvar VideoTrackList = function (_TrackList) {\n  inherits(VideoTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {VideoTrack[]} [tracks=[]]\n   *        A list of `VideoTrack` to instantiate the list with.\n   */\n  function VideoTrackList() {\n    var _this, _ret;\n\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, VideoTrackList);\n\n    var list = void 0;\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].selected) {\n        disableOthers$1(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    // IE8 forces us to implement inheritance ourselves\n    // as it does not support Object.defineProperty properly\n    if (IS_IE8) {\n      list = document.createElement('custom');\n      for (var prop in TrackList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TrackList.prototype[prop];\n        }\n      }\n      for (var _prop in VideoTrackList.prototype) {\n        if (_prop !== 'constructor') {\n          list[_prop] = VideoTrackList.prototype[_prop];\n        }\n      }\n    }\n\n    list = (_this = possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);\n    list.changing_ = false;\n\n    /**\n     * @member {number} VideoTrackList#selectedIndex\n     *         The current index of the selected {@link VideoTrack`}.\n     */\n    Object.defineProperty(list, 'selectedIndex', {\n      get: function get$$1() {\n        for (var _i = 0; _i < this.length; _i++) {\n          if (this[_i].selected) {\n            return _i;\n          }\n        }\n        return -1;\n      },\n      set: function set$$1() {}\n    });\n\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a {@link VideoTrack} to the `VideoTrackList`.\n   *\n   * @param {VideoTrack} track\n   *        The VideoTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  VideoTrackList.prototype.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.selected) {\n      disableOthers$1(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track);\n    // native tracks don't have this\n    if (!track.addEventListener) {\n      return;\n    }\n\n    /**\n     * @listens VideoTrack#selectedchange\n     * @fires TrackList#change\n     */\n    track.addEventListener('selectedchange', function () {\n      if (_this2.changing_) {\n        return;\n      }\n      _this2.changing_ = true;\n      disableOthers$1(_this2, track);\n      _this2.changing_ = false;\n      _this2.trigger('change');\n    });\n  };\n\n  return VideoTrackList;\n}(TrackList);\n\n/**\n * @file text-track-list.js\n */\n/**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n\nvar TextTrackList = function (_TrackList) {\n  inherits(TextTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {TextTrack[]} [tracks=[]]\n   *        A list of `TextTrack` to instantiate the list with.\n   */\n  function TextTrackList() {\n    var _this, _ret;\n\n    var tracks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, TextTrackList);\n\n    var list = void 0;\n\n    // IE8 forces us to implement inheritance ourselves\n    // as it does not support Object.defineProperty properly\n    if (IS_IE8) {\n      list = document.createElement('custom');\n      for (var prop in TrackList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TrackList.prototype[prop];\n        }\n      }\n      for (var _prop in TextTrackList.prototype) {\n        if (_prop !== 'constructor') {\n          list[_prop] = TextTrackList.prototype[_prop];\n        }\n      }\n    }\n\n    list = (_this = possibleConstructorReturn(this, _TrackList.call(this, tracks, list)), _this);\n    return _ret = list, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a {@link TextTrack} to the `TextTrackList`\n   *\n   * @param {TextTrack} track\n   *        The text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  TextTrackList.prototype.addTrack = function addTrack(track) {\n    _TrackList.prototype.addTrack.call(this, track);\n\n    /**\n     * @listens TextTrack#modechange\n     * @fires TrackList#change\n     */\n    track.addEventListener('modechange', bind(this, function () {\n      this.trigger('change');\n    }));\n\n    var nonLanguageTextTrackKind = ['metadata', 'chapters'];\n\n    if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n      track.addEventListener('modechange', bind(this, function () {\n        this.trigger('selectedlanguagechange');\n      }));\n    }\n  };\n\n  return TextTrackList;\n}(TrackList);\n\n/**\n * @file html-track-element-list.js\n */\n\n/**\n * The current list of {@link HtmlTrackElement}s.\n */\n\nvar HtmlTrackElementList = function () {\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {HtmlTrackElement[]} [tracks=[]]\n   *        A list of `HtmlTrackElement` to instantiate the list with.\n   */\n  function HtmlTrackElementList() {\n    var trackElements = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    classCallCheck(this, HtmlTrackElementList);\n\n    var list = this; // eslint-disable-line\n\n    if (IS_IE8) {\n      list = document.createElement('custom');\n\n      for (var prop in HtmlTrackElementList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = HtmlTrackElementList.prototype[prop];\n        }\n      }\n    }\n\n    list.trackElements_ = [];\n\n    /**\n     * @memberof HtmlTrackElementList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n    Object.defineProperty(list, 'length', {\n      get: function get$$1() {\n        return this.trackElements_.length;\n      }\n    });\n\n    for (var i = 0, length = trackElements.length; i < length; i++) {\n      list.addTrackElement_(trackElements[i]);\n    }\n\n    if (IS_IE8) {\n      return list;\n    }\n  }\n\n  /**\n   * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to add to the list.\n   *\n   * @private\n   */\n\n\n  HtmlTrackElementList.prototype.addTrackElement_ = function addTrackElement_(trackElement) {\n    var index = this.trackElements_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get$$1() {\n          return this.trackElements_[index];\n        }\n      });\n    }\n\n    // Do not add duplicate elements\n    if (this.trackElements_.indexOf(trackElement) === -1) {\n      this.trackElements_.push(trackElement);\n    }\n  };\n\n  /**\n   * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n   * {@link TextTrack}.\n   *\n   * @param {TextTrack} track\n   *        The track associated with a track element.\n   *\n   * @return {HtmlTrackElement|undefined}\n   *         The track element that was found or undefined.\n   *\n   * @private\n   */\n\n\n  HtmlTrackElementList.prototype.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {\n    var trackElement_ = void 0;\n\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (track === this.trackElements_[i].track) {\n        trackElement_ = this.trackElements_[i];\n\n        break;\n      }\n    }\n\n    return trackElement_;\n  };\n\n  /**\n   * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to remove from the list.\n   *\n   * @private\n   */\n\n\n  HtmlTrackElementList.prototype.removeTrackElement_ = function removeTrackElement_(trackElement) {\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (trackElement === this.trackElements_[i]) {\n        this.trackElements_.splice(i, 1);\n\n        break;\n      }\n    }\n  };\n\n  return HtmlTrackElementList;\n}();\n\n/**\n * @file text-track-cue-list.js\n */\n/**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n *           The unique id for this text track cue\n *\n * @property {number} startTime\n *           The start time for this text track cue\n *\n * @property {number} endTime\n *           The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n *           Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n/**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\n\nvar TextTrackCueList = function () {\n\n  /**\n   * Create an instance of this class..\n   *\n   * @param {Array} cues\n   *        A list of cues to be initialized with\n   */\n  function TextTrackCueList(cues) {\n    classCallCheck(this, TextTrackCueList);\n\n    var list = this; // eslint-disable-line\n\n    if (IS_IE8) {\n      list = document.createElement('custom');\n\n      for (var prop in TextTrackCueList.prototype) {\n        if (prop !== 'constructor') {\n          list[prop] = TextTrackCueList.prototype[prop];\n        }\n      }\n    }\n\n    TextTrackCueList.prototype.setCues_.call(list, cues);\n\n    /**\n     * @memberof TextTrackCueList\n     * @member {number} length\n     *         The current number of `TextTrackCue`s in the TextTrackCueList.\n     * @instance\n     */\n    Object.defineProperty(list, 'length', {\n      get: function get$$1() {\n        return this.length_;\n      }\n    });\n\n    if (IS_IE8) {\n      return list;\n    }\n  }\n\n  /**\n   * A setter for cues in this list. Creates getters\n   * an an index for the cues.\n   *\n   * @param {Array} cues\n   *        An array of cues to set\n   *\n   * @private\n   */\n\n\n  TextTrackCueList.prototype.setCues_ = function setCues_(cues) {\n    var oldLength = this.length || 0;\n    var i = 0;\n    var l = cues.length;\n\n    this.cues_ = cues;\n    this.length_ = cues.length;\n\n    var defineProp = function defineProp(index) {\n      if (!('' + index in this)) {\n        Object.defineProperty(this, '' + index, {\n          get: function get$$1() {\n            return this.cues_[index];\n          }\n        });\n      }\n    };\n\n    if (oldLength < l) {\n      i = oldLength;\n\n      for (; i < l; i++) {\n        defineProp.call(this, i);\n      }\n    }\n  };\n\n  /**\n   * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n   *\n   * @param {string} id\n   *        The id of the cue that should be searched for.\n   *\n   * @return {TextTrackCueList~TextTrackCue|null}\n   *         A single cue or null if none was found.\n   */\n\n\n  TextTrackCueList.prototype.getCueById = function getCueById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var cue = this[i];\n\n      if (cue.id === id) {\n        result = cue;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TextTrackCueList;\n}();\n\n/**\n * @file track-kinds.js\n */\n\n/**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\nvar VideoTrackKind = {\n  alternative: 'alternative',\n  captions: 'captions',\n  main: 'main',\n  sign: 'sign',\n  subtitles: 'subtitles',\n  commentary: 'commentary'\n};\n\n/**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\nvar AudioTrackKind = {\n  'alternative': 'alternative',\n  'descriptions': 'descriptions',\n  'main': 'main',\n  'main-desc': 'main-desc',\n  'translation': 'translation',\n  'commentary': 'commentary'\n};\n\n/**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\nvar TextTrackKind = {\n  subtitles: 'subtitles',\n  captions: 'captions',\n  descriptions: 'descriptions',\n  chapters: 'chapters',\n  metadata: 'metadata'\n};\n\n/**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\nvar TextTrackMode = {\n  disabled: 'disabled',\n  hidden: 'hidden',\n  showing: 'showing'\n};\n\n/**\n * @file track.js\n */\n/**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n\nvar Track = function (_EventTarget) {\n  inherits(Track, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid kind for the track type you are creating.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @abstract\n   */\n  function Track() {\n    var _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, Track);\n\n    var _this = possibleConstructorReturn(this, _EventTarget.call(this));\n\n    var track = _this; // eslint-disable-line\n\n    if (IS_IE8) {\n      track = document.createElement('custom');\n      for (var prop in Track.prototype) {\n        if (prop !== 'constructor') {\n          track[prop] = Track.prototype[prop];\n        }\n      }\n    }\n\n    var trackProps = {\n      id: options.id || 'vjs_track_' + newGUID(),\n      kind: options.kind || '',\n      label: options.label || '',\n      language: options.language || ''\n    };\n\n    /**\n     * @memberof Track\n     * @member {string} id\n     *         The id of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} kind\n     *         The kind of track that this is. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} label\n     *         The label of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} language\n     *         The two letter language code for this track. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    var _loop = function _loop(key) {\n      Object.defineProperty(track, key, {\n        get: function get$$1() {\n          return trackProps[key];\n        },\n        set: function set$$1() {}\n      });\n    };\n\n    for (var key in trackProps) {\n      _loop(key);\n    }\n\n    return _ret = track, possibleConstructorReturn(_this, _ret);\n  }\n\n  return Track;\n}(EventTarget);\n\n/**\n * @file url.js\n * @module url\n */\n/**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n *           The protocol of the url that was parsed.\n *\n * @property {string} hostname\n *           The hostname of the url that was parsed.\n *\n * @property {string} port\n *           The port of the url that was parsed.\n *\n * @property {string} pathname\n *           The pathname of the url that was parsed.\n *\n * @property {string} search\n *           The search query of the url that was parsed.\n *\n * @property {string} hash\n *           The hash of the url that was parsed.\n *\n * @property {string} host\n *           The host of the url that was parsed.\n */\n\n/**\n * Resolve and parse the elements of a URL.\n *\n * @param  {String} url\n *         The url to parse\n *\n * @return {url:URLObject}\n *         An object of url details\n */\nvar parseUrl = function parseUrl(url) {\n  var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host'];\n\n  // add the url to an anchor and let the browser parse the URL\n  var a = document.createElement('a');\n\n  a.href = url;\n\n  // IE8 (and 9?) Fix\n  // ie8 doesn't parse the URL correctly until the anchor is actually\n  // added to the body, and an innerHTML is needed to trigger the parsing\n  var addToBody = a.host === '' && a.protocol !== 'file:';\n  var div = void 0;\n\n  if (addToBody) {\n    div = document.createElement('div');\n    div.innerHTML = '<a href=\"' + url + '\"></a>';\n    a = div.firstChild;\n    // prevent the div from affecting layout\n    div.setAttribute('style', 'display:none; position:absolute;');\n    document.body.appendChild(div);\n  }\n\n  // Copy the specific URL properties to a new object\n  // This is also needed for IE8 because the anchor loses its\n  // properties when it's removed from the dom\n  var details = {};\n\n  for (var i = 0; i < props.length; i++) {\n    details[props[i]] = a[props[i]];\n  }\n\n  // IE9 adds the port to the host property unlike everyone else. If\n  // a port identifier is added for standard ports, strip it.\n  if (details.protocol === 'http:') {\n    details.host = details.host.replace(/:80$/, '');\n  }\n\n  if (details.protocol === 'https:') {\n    details.host = details.host.replace(/:443$/, '');\n  }\n\n  if (!details.protocol) {\n    details.protocol = window.location.protocol;\n  }\n\n  if (addToBody) {\n    document.body.removeChild(div);\n  }\n\n  return details;\n};\n\n/**\n * Get absolute version of relative URL. Used to tell flash correct URL.\n *\n *\n * @param  {string} url\n *         URL to make absolute\n *\n * @return {string}\n *         Absolute URL\n *\n * @see http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\nvar getAbsoluteURL = function getAbsoluteURL(url) {\n  // Check if absolute URL\n  if (!url.match(/^https?:\\/\\//)) {\n    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.\n    var div = document.createElement('div');\n\n    div.innerHTML = '<a href=\"' + url + '\">x</a>';\n    url = div.firstChild.href;\n  }\n\n  return url;\n};\n\n/**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @param {string} path\n *        The fileName path like '/path/to/file.mp4'\n *\n * @returns {string}\n *          The extension in lower case or an empty string if no\n *          extension could be found.\n */\nvar getFileExtension = function getFileExtension(path) {\n  if (typeof path === 'string') {\n    var splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/i;\n    var pathParts = splitPathRe.exec(path);\n\n    if (pathParts) {\n      return pathParts.pop().toLowerCase();\n    }\n  }\n\n  return '';\n};\n\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @param {string} url\n *        The url to check.\n *\n * @return {boolean}\n *         Whether it is a cross domain request or not.\n */\nvar isCrossOrigin = function isCrossOrigin(url) {\n  var winLoc = window.location;\n  var urlInfo = parseUrl(url);\n\n  // IE8 protocol relative urls will return ':' for protocol\n  var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol;\n\n  // Check if url is for another domain/origin\n  // IE8 doesn't know location.origin, so we won't rely on it here\n  var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n\n  return crossOrigin;\n};\n\nvar Url = (Object.freeze || Object)({\n\tparseUrl: parseUrl,\n\tgetAbsoluteURL: getAbsoluteURL,\n\tgetFileExtension: getFileExtension,\n\tisCrossOrigin: isCrossOrigin\n});\n\n/**\n * @file text-track.js\n */\n/**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n *        webVTT file contents\n *\n * @param {TextTrack} track\n *        TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\nvar parseCues = function parseCues(srcContent, track) {\n  var parser = new window.WebVTT.Parser(window, window.vttjs, window.WebVTT.StringDecoder());\n  var errors = [];\n\n  parser.oncue = function (cue) {\n    track.addCue(cue);\n  };\n\n  parser.onparsingerror = function (error) {\n    errors.push(error);\n  };\n\n  parser.onflush = function () {\n    track.trigger({\n      type: 'loadeddata',\n      target: track\n    });\n  };\n\n  parser.parse(srcContent);\n  if (errors.length > 0) {\n    if (window.console && window.console.groupCollapsed) {\n      window.console.groupCollapsed('Text Track parsing errors for ' + track.src);\n    }\n    errors.forEach(function (error) {\n      return log.error(error);\n    });\n    if (window.console && window.console.groupEnd) {\n      window.console.groupEnd();\n    }\n  }\n\n  parser.flush();\n};\n\n/**\n * Load a `TextTrack` from a specifed url.\n *\n * @param {string} src\n *        Url to load track from.\n *\n * @param {TextTrack} track\n *        Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\nvar loadTrack = function loadTrack(src, track) {\n  var opts = {\n    uri: src\n  };\n  var crossOrigin = isCrossOrigin(src);\n\n  if (crossOrigin) {\n    opts.cors = crossOrigin;\n  }\n\n  xhr(opts, bind(this, function (err, response, responseBody) {\n    if (err) {\n      return log.error(err, response);\n    }\n\n    track.loaded_ = true;\n\n    // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n    // NOTE: this is only used for the alt/video.novtt.js build\n    if (typeof window.WebVTT !== 'function') {\n      if (track.tech_) {\n        var loadHandler = function loadHandler() {\n          return parseCues(responseBody, track);\n        };\n\n        track.tech_.on('vttjsloaded', loadHandler);\n        track.tech_.on('vttjserror', function () {\n          log.error('vttjs failed to load, stopping trying to process ' + track.src);\n          track.tech_.off('vttjsloaded', loadHandler);\n        });\n      }\n    } else {\n      parseCues(responseBody, track);\n    }\n  }));\n};\n\n/**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n\nvar TextTrack = function (_Track) {\n  inherits(TextTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this TextTrack.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        vesion of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function TextTrack() {\n    var _this, _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, TextTrack);\n\n    if (!options.tech) {\n      throw new Error('A tech was not provided.');\n    }\n\n    var settings = mergeOptions(options, {\n      kind: TextTrackKind[options.kind] || 'subtitles',\n      language: options.language || options.srclang || ''\n    });\n    var mode = TextTrackMode[settings.mode] || 'disabled';\n    var default_ = settings['default'];\n\n    if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n      mode = 'hidden';\n    }\n    // on IE8 this will be a document element\n    // for every other browser this will be a normal object\n    var tt = (_this = possibleConstructorReturn(this, _Track.call(this, settings)), _this);\n\n    tt.tech_ = settings.tech;\n\n    if (IS_IE8) {\n      for (var prop in TextTrack.prototype) {\n        if (prop !== 'constructor') {\n          tt[prop] = TextTrack.prototype[prop];\n        }\n      }\n    }\n\n    tt.cues_ = [];\n    tt.activeCues_ = [];\n\n    var cues = new TextTrackCueList(tt.cues_);\n    var activeCues = new TextTrackCueList(tt.activeCues_);\n    var changed = false;\n    var timeupdateHandler = bind(tt, function () {\n\n      // Accessing this.activeCues for the side-effects of updating itself\n      // due to it's nature as a getter function. Do not remove or cues will\n      // stop updating!\n      // Use the setter to prevent deletion from uglify (pure_getters rule)\n      this.activeCues = this.activeCues;\n      if (changed) {\n        this.trigger('cuechange');\n        changed = false;\n      }\n    });\n\n    if (mode !== 'disabled') {\n      tt.tech_.ready(function () {\n        tt.tech_.on('timeupdate', timeupdateHandler);\n      }, true);\n    }\n\n    /**\n     * @memberof TextTrack\n     * @member {boolean} default\n     *         If this track was set to be on or off by default. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n    Object.defineProperty(tt, 'default', {\n      get: function get$$1() {\n        return default_;\n      },\n      set: function set$$1() {}\n    });\n\n    /**\n     * @memberof TextTrack\n     * @member {string} mode\n     *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n     *         not be set if setting to an invalid mode.\n     * @instance\n     *\n     * @fires TextTrack#modechange\n     */\n    Object.defineProperty(tt, 'mode', {\n      get: function get$$1() {\n        return mode;\n      },\n      set: function set$$1(newMode) {\n        var _this2 = this;\n\n        if (!TextTrackMode[newMode]) {\n          return;\n        }\n        mode = newMode;\n        if (mode !== 'disabled') {\n\n          this.tech_.ready(function () {\n            _this2.tech_.on('timeupdate', timeupdateHandler);\n          }, true);\n        } else {\n          this.tech_.off('timeupdate', timeupdateHandler);\n        }\n        /**\n         * An event that fires when mode changes on this track. This allows\n         * the TextTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec!\n         *\n         * @event TextTrack#modechange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('modechange');\n      }\n    });\n\n    /**\n     * @memberof TextTrack\n     * @member {TextTrackCueList} cues\n     *         The text track cue list for this TextTrack.\n     * @instance\n     */\n    Object.defineProperty(tt, 'cues', {\n      get: function get$$1() {\n        if (!this.loaded_) {\n          return null;\n        }\n\n        return cues;\n      },\n      set: function set$$1() {}\n    });\n\n    /**\n     * @memberof TextTrack\n     * @member {TextTrackCueList} activeCues\n     *         The list text track cues that are currently active for this TextTrack.\n     * @instance\n     */\n    Object.defineProperty(tt, 'activeCues', {\n      get: function get$$1() {\n        if (!this.loaded_) {\n          return null;\n        }\n\n        // nothing to do\n        if (this.cues.length === 0) {\n          return activeCues;\n        }\n\n        var ct = this.tech_.currentTime();\n        var active = [];\n\n        for (var i = 0, l = this.cues.length; i < l; i++) {\n          var cue = this.cues[i];\n\n          if (cue.startTime <= ct && cue.endTime >= ct) {\n            active.push(cue);\n          } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {\n            active.push(cue);\n          }\n        }\n\n        changed = false;\n\n        if (active.length !== this.activeCues_.length) {\n          changed = true;\n        } else {\n          for (var _i = 0; _i < active.length; _i++) {\n            if (this.activeCues_.indexOf(active[_i]) === -1) {\n              changed = true;\n            }\n          }\n        }\n\n        this.activeCues_ = active;\n        activeCues.setCues_(this.activeCues_);\n\n        return activeCues;\n      },\n\n\n      // /!\\ Keep this setter empty (see the timeupdate handler above)\n      set: function set$$1() {}\n    });\n\n    if (settings.src) {\n      tt.src = settings.src;\n      loadTrack(settings.src, tt);\n    } else {\n      tt.loaded_ = true;\n    }\n\n    return _ret = tt, possibleConstructorReturn(_this, _ret);\n  }\n\n  /**\n   * Add a cue to the internal list of cues.\n   *\n   * @param {TextTrack~Cue} cue\n   *        The cue to add to our internal list\n   */\n\n\n  TextTrack.prototype.addCue = function addCue(originalCue) {\n    var cue = originalCue;\n\n    if (window.vttjs && !(originalCue instanceof window.vttjs.VTTCue)) {\n      cue = new window.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n\n      for (var prop in originalCue) {\n        if (!(prop in cue)) {\n          cue[prop] = originalCue[prop];\n        }\n      }\n\n      // make sure that `id` is copied over\n      cue.id = originalCue.id;\n      cue.originalCue_ = originalCue;\n    }\n\n    var tracks = this.tech_.textTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      if (tracks[i] !== this) {\n        tracks[i].removeCue(cue);\n      }\n    }\n\n    this.cues_.push(cue);\n    this.cues.setCues_(this.cues_);\n  };\n\n  /**\n   * Remove a cue from our internal list\n   *\n   * @param {TextTrack~Cue} removeCue\n   *        The cue to remove from our internal list\n   */\n\n\n  TextTrack.prototype.removeCue = function removeCue(_removeCue) {\n    var i = this.cues_.length;\n\n    while (i--) {\n      var cue = this.cues_[i];\n\n      if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {\n        this.cues_.splice(i, 1);\n        this.cues.setCues_(this.cues_);\n        break;\n      }\n    }\n  };\n\n  return TextTrack;\n}(Track);\n\n/**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n\n\nTextTrack.prototype.allowedEvents_ = {\n  cuechange: 'cuechange'\n};\n\n/**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n\nvar AudioTrack = function (_Track) {\n  inherits(AudioTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {AudioTrack~Kind} [options.kind='']\n   *        A valid audio track kind\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.enabled]\n   *        If this track is the one that is currently playing. If this track is part of\n   *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n   */\n  function AudioTrack() {\n    var _this, _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, AudioTrack);\n\n    var settings = mergeOptions(options, {\n      kind: AudioTrackKind[options.kind] || ''\n    });\n    // on IE8 this will be a document element\n    // for every other browser this will be a normal object\n    var track = (_this = possibleConstructorReturn(this, _Track.call(this, settings)), _this);\n    var enabled = false;\n\n    if (IS_IE8) {\n      for (var prop in AudioTrack.prototype) {\n        if (prop !== 'constructor') {\n          track[prop] = AudioTrack.prototype[prop];\n        }\n      }\n    }\n    /**\n     * @memberof AudioTrack\n     * @member {boolean} enabled\n     *         If this `AudioTrack` is enabled or not. When setting this will\n     *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n    Object.defineProperty(track, 'enabled', {\n      get: function get$$1() {\n        return enabled;\n      },\n      set: function set$$1(newEnabled) {\n        // an invalid or unchanged value\n        if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n          return;\n        }\n        enabled = newEnabled;\n\n        /**\n         * An event that fires when enabled changes on this track. This allows\n         * the AudioTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event AudioTrack#enabledchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('enabledchange');\n      }\n    });\n\n    // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n    if (settings.enabled) {\n      track.enabled = settings.enabled;\n    }\n    track.loaded_ = true;\n\n    return _ret = track, possibleConstructorReturn(_this, _ret);\n  }\n\n  return AudioTrack;\n}(Track);\n\n/**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n\nvar VideoTrack = function (_Track) {\n  inherits(VideoTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid {@link VideoTrack~Kind}\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.selected]\n   *        If this track is the one that is currently playing.\n   */\n  function VideoTrack() {\n    var _this, _ret;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, VideoTrack);\n\n    var settings = mergeOptions(options, {\n      kind: VideoTrackKind[options.kind] || ''\n    });\n\n    // on IE8 this will be a document element\n    // for every other browser this will be a normal object\n    var track = (_this = possibleConstructorReturn(this, _Track.call(this, settings)), _this);\n    var selected = false;\n\n    if (IS_IE8) {\n      for (var prop in VideoTrack.prototype) {\n        if (prop !== 'constructor') {\n          track[prop] = VideoTrack.prototype[prop];\n        }\n      }\n    }\n\n    /**\n     * @memberof VideoTrack\n     * @member {boolean} selected\n     *         If this `VideoTrack` is selected or not. When setting this will\n     *         fire {@link VideoTrack#selectedchange} if the state of selected changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n    Object.defineProperty(track, 'selected', {\n      get: function get$$1() {\n        return selected;\n      },\n      set: function set$$1(newSelected) {\n        // an invalid or unchanged value\n        if (typeof newSelected !== 'boolean' || newSelected === selected) {\n          return;\n        }\n        selected = newSelected;\n\n        /**\n         * An event that fires when selected changes on this track. This allows\n         * the VideoTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event VideoTrack#selectedchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('selectedchange');\n      }\n    });\n\n    // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n    if (settings.selected) {\n      track.selected = settings.selected;\n    }\n\n    return _ret = track, possibleConstructorReturn(_this, _ret);\n  }\n\n  return VideoTrack;\n}(Track);\n\n/**\n * @file html-track-element.js\n */\n\n/**\n * @memberof HTMLTrackElement\n * @typedef {HTMLTrackElement~ReadyState}\n * @enum {number}\n */\nvar NONE = 0;\nvar LOADING = 1;\nvar LOADED = 2;\nvar ERROR = 3;\n\n/**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n\nvar HTMLTrackElement = function (_EventTarget) {\n  inherits(HTMLTrackElement, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this HTMLTrackElement.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        vesion of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function HTMLTrackElement() {\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    classCallCheck(this, HTMLTrackElement);\n\n    var _this = possibleConstructorReturn(this, _EventTarget.call(this));\n\n    var readyState = void 0;\n    var trackElement = _this; // eslint-disable-line\n\n    if (IS_IE8) {\n      trackElement = document.createElement('custom');\n\n      for (var prop in HTMLTrackElement.prototype) {\n        if (prop !== 'constructor') {\n          trackElement[prop] = HTMLTrackElement.prototype[prop];\n        }\n      }\n    }\n\n    var track = new TextTrack(options);\n\n    trackElement.kind = track.kind;\n    trackElement.src = track.src;\n    trackElement.srclang = track.language;\n    trackElement.label = track.label;\n    trackElement['default'] = track['default'];\n\n    /**\n     * @memberof HTMLTrackElement\n     * @member {HTMLTrackElement~ReadyState} readyState\n     *         The current ready state of the track element.\n     * @instance\n     */\n    Object.defineProperty(trackElement, 'readyState', {\n      get: function get$$1() {\n        return readyState;\n      }\n    });\n\n    /**\n     * @memberof HTMLTrackElement\n     * @member {TextTrack} track\n     *         The underlying TextTrack object.\n     * @instance\n     *\n     */\n    Object.defineProperty(trackElement, 'track', {\n      get: function get$$1() {\n        return track;\n      }\n    });\n\n    readyState = NONE;\n\n    /**\n     * @listens TextTrack#loadeddata\n     * @fires HTMLTrackElement#load\n     */\n    track.addEventListener('loadeddata', function () {\n      readyState = LOADED;\n\n      trackElement.trigger({\n        type: 'load',\n        target: trackElement\n      });\n    });\n\n    if (IS_IE8) {\n      var _ret;\n\n      return _ret = trackElement, possibleConstructorReturn(_this, _ret);\n    }\n    return _this;\n  }\n\n  return HTMLTrackElement;\n}(EventTarget);\n\nHTMLTrackElement.prototype.allowedEvents_ = {\n  load: 'load'\n};\n\nHTMLTrackElement.NONE = NONE;\nHTMLTrackElement.LOADING = LOADING;\nHTMLTrackElement.LOADED = LOADED;\nHTMLTrackElement.ERROR = ERROR;\n\n/*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\nvar NORMAL = {\n  audio: {\n    ListClass: AudioTrackList,\n    TrackClass: AudioTrack,\n    capitalName: 'Audio'\n  },\n  video: {\n    ListClass: VideoTrackList,\n    TrackClass: VideoTrack,\n    capitalName: 'Video'\n  },\n  text: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'Text'\n  }\n};\n\nObject.keys(NORMAL).forEach(function (type) {\n  NORMAL[type].getterName = type + 'Tracks';\n  NORMAL[type].privateName = type + 'Tracks_';\n});\n\nvar REMOTE = {\n  remoteText: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'RemoteText',\n    getterName: 'remoteTextTracks',\n    privateName: 'remoteTextTracks_'\n  },\n  remoteTextEl: {\n    ListClass: HtmlTrackElementList,\n    TrackClass: HTMLTrackElement,\n    capitalName: 'RemoteTextTrackEls',\n    getterName: 'remoteTextTrackEls',\n    privateName: 'remoteTextTrackEls_'\n  }\n};\n\nvar ALL = mergeOptions(NORMAL, REMOTE);\n\nREMOTE.names = Object.keys(REMOTE);\nNORMAL.names = Object.keys(NORMAL);\nALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n\n/**\n * @file tech.js\n */\n\n/**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n   * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n *           The url to the source\n *\n * @property {string} type\n *           The mime type of the source\n */\n\n/**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n *        An instance of the Tech class.\n *\n * @param {string} kind\n *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n *        Label to identify the text track\n *\n * @param {string} [language]\n *        Two letter language abbreviation\n *\n * @param {Object} [options={}]\n *        An object with additional text track options\n *\n * @return {TextTrack}\n *          The text track that was created.\n */\nfunction createTrackHelper(self, kind, label, language) {\n  var options = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {};\n\n  var tracks = self.textTracks();\n\n  options.kind = kind;\n\n  if (label) {\n    options.label = label;\n  }\n  if (language) {\n    options.language = language;\n  }\n  options.tech = self;\n\n  var track = new ALL.text.TrackClass(options);\n\n  tracks.addTrack(track);\n\n  return track;\n}\n\n/**\n * This is the base class for media playback technology controllers, such as\n * {@link Flash} and {@link HTML5}\n *\n * @extends Component\n */\n\nvar Tech = function (_Component) {\n  inherits(Tech, _Component);\n\n  /**\n   * Create an instance of this Tech.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} ready\n   *        Callback function to call when the `HTML5` Tech is ready.\n   */\n  function Tech() {\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    var ready = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : function () {};\n    classCallCheck(this, Tech);\n\n    // we don't want the tech to report user activity automatically.\n    // This is done manually in addControlsListeners\n    options.reportTouchActivity = false;\n\n    // keep track of whether the current source has played at all to\n    // implement a very limited played()\n    var _this = possibleConstructorReturn(this, _Component.call(this, null, options, ready));\n\n    _this.hasStarted_ = false;\n    _this.on('playing', function () {\n      this.hasStarted_ = true;\n    });\n    _this.on('loadstart', function () {\n      this.hasStarted_ = false;\n    });\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      if (options && options[props.getterName]) {\n        _this[props.privateName] = options[props.getterName];\n      }\n    });\n\n    // Manually track progress in cases where the browser/flash player doesn't report it.\n    if (!_this.featuresProgressEvents) {\n      _this.manualProgressOn();\n    }\n\n    // Manually track timeupdates in cases where the browser/flash player doesn't report it.\n    if (!_this.featuresTimeupdateEvents) {\n      _this.manualTimeUpdatesOn();\n    }\n\n    ['Text', 'Audio', 'Video'].forEach(function (track) {\n      if (options['native' + track + 'Tracks'] === false) {\n        _this['featuresNative' + track + 'Tracks'] = false;\n      }\n    });\n\n    if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n      _this.featuresNativeTextTracks = false;\n    } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n      _this.featuresNativeTextTracks = true;\n    }\n\n    if (!_this.featuresNativeTextTracks) {\n      _this.emulateTextTracks();\n    }\n\n    _this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n\n    _this.initTrackListeners();\n\n    // Turn on component tap events only if not using native controls\n    if (!options.nativeControlsForTouch) {\n      _this.emitTapEvents();\n    }\n\n    if (_this.constructor) {\n      _this.name_ = _this.constructor.name || 'Unknown Tech';\n    }\n    return _this;\n  }\n\n  /**\n   * A special function to trigger source set in a way that will allow player\n   * to re-trigger if the player or tech are not ready yet.\n   *\n   * @fires Tech#sourceset\n   * @param {string} src The source string at the time of the source changing.\n   */\n\n\n  Tech.prototype.triggerSourceset = function triggerSourceset(src) {\n    var _this2 = this;\n\n    if (!this.isReady_) {\n      // on initial ready we have to trigger source set\n      // 1ms after ready so that player can watch for it.\n      this.one('ready', function () {\n        return _this2.setTimeout(function () {\n          return _this2.triggerSourceset(src);\n        }, 1);\n      });\n    }\n\n    /**\n     * Fired when the source is set on the tech causing the media element\n     * to reload.\n     *\n     * @see {@link Player#event:sourceset}\n     * @event Tech#sourceset\n     * @type {EventTarget~Event}\n     */\n    this.trigger({\n      src: src,\n      type: 'sourceset'\n    });\n  };\n\n  /* Fallbacks for unsupported event types\n  ================================================================================ */\n\n  /**\n   * Polyfill the `progress` event for browsers that don't support it natively.\n   *\n   * @see {@link Tech#trackProgress}\n   */\n\n\n  Tech.prototype.manualProgressOn = function manualProgressOn() {\n    this.on('durationchange', this.onDurationChange);\n\n    this.manualProgress = true;\n\n    // Trigger progress watching when a source begins loading\n    this.one('ready', this.trackProgress);\n  };\n\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   */\n\n\n  Tech.prototype.manualProgressOff = function manualProgressOff() {\n    this.manualProgress = false;\n    this.stopTrackingProgress();\n\n    this.off('durationchange', this.onDurationChange);\n  };\n\n  /**\n   * This is used to trigger a `progress` event when the buffered percent changes. It\n   * sets an interval function that will be called every 500 milliseconds to check if the\n   * buffer end percent has changed.\n   *\n   * > This function is called by {@link Tech#manualProgressOn}\n   *\n   * @param {EventTarget~Event} event\n   *        The `ready` event that caused this to run.\n   *\n   * @listens Tech#ready\n   * @fires Tech#progress\n   */\n\n\n  Tech.prototype.trackProgress = function trackProgress(event) {\n    this.stopTrackingProgress();\n    this.progressInterval = this.setInterval(bind(this, function () {\n      // Don't trigger unless buffered amount is greater than last time\n\n      var numBufferedPercent = this.bufferedPercent();\n\n      if (this.bufferedPercent_ !== numBufferedPercent) {\n        /**\n         * See {@link Player#progress}\n         *\n         * @event Tech#progress\n         * @type {EventTarget~Event}\n         */\n        this.trigger('progress');\n      }\n\n      this.bufferedPercent_ = numBufferedPercent;\n\n      if (numBufferedPercent === 1) {\n        this.stopTrackingProgress();\n      }\n    }), 500);\n  };\n\n  /**\n   * Update our internal duration on a `durationchange` event by calling\n   * {@link Tech#duration}.\n   *\n   * @param {EventTarget~Event} event\n   *        The `durationchange` event that caused this to run.\n   *\n   * @listens Tech#durationchange\n   */\n\n\n  Tech.prototype.onDurationChange = function onDurationChange(event) {\n    this.duration_ = this.duration();\n  };\n\n  /**\n   * Get and create a `TimeRange` object for buffering.\n   *\n   * @return {TimeRange}\n   *         The time range object that was created.\n   */\n\n\n  Tech.prototype.buffered = function buffered() {\n    return createTimeRanges(0, 0);\n  };\n\n  /**\n   * Get the percentage of the current video that is currently buffered.\n   *\n   * @return {number}\n   *         A number from 0 to 1 that represents the decimal percentage of the\n   *         video that is buffered.\n   *\n   */\n\n\n  Tech.prototype.bufferedPercent = function bufferedPercent$$1() {\n    return bufferedPercent(this.buffered(), this.duration_);\n  };\n\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   * Stop manually tracking progress events by clearing the interval that was set in\n   * {@link Tech#trackProgress}.\n   */\n\n\n  Tech.prototype.stopTrackingProgress = function stopTrackingProgress() {\n    this.clearInterval(this.progressInterval);\n  };\n\n  /**\n   * Polyfill the `timeupdate` event for browsers that don't support it.\n   *\n   * @see {@link Tech#trackCurrentTime}\n   */\n\n\n  Tech.prototype.manualTimeUpdatesOn = function manualTimeUpdatesOn() {\n    this.manualTimeUpdates = true;\n\n    this.on('play', this.trackCurrentTime);\n    this.on('pause', this.stopTrackingCurrentTime);\n  };\n\n  /**\n   * Turn off the polyfill for `timeupdate` events that was created in\n   * {@link Tech#manualTimeUpdatesOn}\n   */\n\n\n  Tech.prototype.manualTimeUpdatesOff = function manualTimeUpdatesOff() {\n    this.manualTimeUpdates = false;\n    this.stopTrackingCurrentTime();\n    this.off('play', this.trackCurrentTime);\n    this.off('pause', this.stopTrackingCurrentTime);\n  };\n\n  /**\n   * Sets up an interval function to track current time and trigger `timeupdate` every\n   * 250 milliseconds.\n   *\n   * @listens Tech#play\n   * @triggers Tech#timeupdate\n   */\n\n\n  Tech.prototype.trackCurrentTime = function trackCurrentTime() {\n    if (this.currentTimeInterval) {\n      this.stopTrackingCurrentTime();\n    }\n    this.currentTimeInterval = this.setInterval(function () {\n      /**\n       * Triggered at an interval of 250ms to indicated that time is passing in the video.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n\n      // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n    }, 250);\n  };\n\n  /**\n   * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n   * `timeupdate` event is no longer triggered.\n   *\n   * @listens {Tech#pause}\n   */\n\n\n  Tech.prototype.stopTrackingCurrentTime = function stopTrackingCurrentTime() {\n    this.clearInterval(this.currentTimeInterval);\n\n    // #1002 - if the video ends right before the next timeupdate would happen,\n    // the progress bar won't make it all the way to the end\n    this.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n  };\n\n  /**\n   * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n   * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n   *\n   * @fires Component#dispose\n   */\n\n\n  Tech.prototype.dispose = function dispose() {\n\n    // clear out all tracks because we can't reuse them between techs\n    this.clearTracks(NORMAL.names);\n\n    // Turn off any manual progress or timeupdate tracking\n    if (this.manualProgress) {\n      this.manualProgressOff();\n    }\n\n    if (this.manualTimeUpdates) {\n      this.manualTimeUpdatesOff();\n    }\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n   *\n   * > Note: Techs without source handlers should call this between sources for `video`\n   *         & `audio` tracks. You don't want to use them between tracks!\n   *\n   * @param {string[]|string} types\n   *        TrackList names to clear, valid names are `video`, `audio`, and\n   *        `text`.\n   */\n\n\n  Tech.prototype.clearTracks = function clearTracks(types) {\n    var _this3 = this;\n\n    types = [].concat(types);\n    // clear out all tracks because we can't reuse them between techs\n    types.forEach(function (type) {\n      var list = _this3[type + 'Tracks']() || [];\n      var i = list.length;\n\n      while (i--) {\n        var track = list[i];\n\n        if (type === 'text') {\n          _this3.removeRemoteTextTrack(track);\n        }\n        list.removeTrack(track);\n      }\n    });\n  };\n\n  /**\n   * Remove any TextTracks added via addRemoteTextTrack that are\n   * flagged for automatic garbage collection\n   */\n\n\n  Tech.prototype.cleanupAutoTextTracks = function cleanupAutoTextTracks() {\n    var list = this.autoRemoteTextTracks_ || [];\n    var i = list.length;\n\n    while (i--) {\n      var track = list[i];\n\n      this.removeRemoteTextTrack(track);\n    }\n  };\n\n  /**\n   * Reset the tech, which will removes all sources and reset the internal readyState.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.reset = function reset() {};\n\n  /**\n   * Get or set an error on the Tech.\n   *\n   * @param {MediaError} [err]\n   *        Error to set on the Tech\n   *\n   * @return {MediaError|null}\n   *         The current error object on the tech, or null if there isn't one.\n   */\n\n\n  Tech.prototype.error = function error(err) {\n    if (err !== undefined) {\n      this.error_ = new MediaError(err);\n      this.trigger('error');\n    }\n    return this.error_;\n  };\n\n  /**\n   * Returns the `TimeRange`s that have been played through for the current source.\n   *\n   * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n   *         It only checks wether the source has played at all or not.\n   *\n   * @return {TimeRange}\n   *         - A single time range if this video has played\n   *         - An empty set of ranges if not.\n   */\n\n\n  Tech.prototype.played = function played() {\n    if (this.hasStarted_) {\n      return createTimeRanges(0, 0);\n    }\n    return createTimeRanges();\n  };\n\n  /**\n   * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n   * previously called.\n   *\n   * @fires Tech#timeupdate\n   */\n\n\n  Tech.prototype.setCurrentTime = function setCurrentTime() {\n    // improve the accuracy of manual timeupdates\n    if (this.manualTimeUpdates) {\n      /**\n       * A manual `timeupdate` event.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n    }\n  };\n\n  /**\n   * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n   * {@link TextTrackList} events.\n   *\n   * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.\n   *\n   * @fires Tech#audiotrackchange\n   * @fires Tech#videotrackchange\n   * @fires Tech#texttrackchange\n   */\n\n\n  Tech.prototype.initTrackListeners = function initTrackListeners() {\n    var _this4 = this;\n\n    /**\n     * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n     *\n     * @event Tech#audiotrackchange\n     * @type {EventTarget~Event}\n     */\n\n    /**\n     * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n     *\n     * @event Tech#videotrackchange\n     * @type {EventTarget~Event}\n     */\n\n    /**\n     * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n     *\n     * @event Tech#texttrackchange\n     * @type {EventTarget~Event}\n     */\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n      var trackListChanges = function trackListChanges() {\n        _this4.trigger(name + 'trackchange');\n      };\n\n      var tracks = _this4[props.getterName]();\n\n      tracks.addEventListener('removetrack', trackListChanges);\n      tracks.addEventListener('addtrack', trackListChanges);\n\n      _this4.on('dispose', function () {\n        tracks.removeEventListener('removetrack', trackListChanges);\n        tracks.removeEventListener('addtrack', trackListChanges);\n      });\n    });\n  };\n\n  /**\n   * Emulate TextTracks using vtt.js if necessary\n   *\n   * @fires Tech#vttjsloaded\n   * @fires Tech#vttjserror\n   */\n\n\n  Tech.prototype.addWebVttScript_ = function addWebVttScript_() {\n    var _this5 = this;\n\n    if (window.WebVTT) {\n      return;\n    }\n\n    // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n    // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n    // before inserting the WebVTT script\n    if (document.body.contains(this.el())) {\n\n      // load via require if available and vtt.js script location was not passed in\n      // as an option. novtt builds will turn the above require call into an empty object\n      // which will cause this if check to always fail.\n      if (!this.options_['vtt.js'] && isPlain(vtt) && Object.keys(vtt).length > 0) {\n        this.trigger('vttjsloaded');\n        return;\n      }\n\n      // load vtt.js via the script location option or the cdn of no location was\n      // passed in\n      var script = document.createElement('script');\n\n      script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.12.4/vtt.min.js';\n      script.onload = function () {\n        /**\n         * Fired when vtt.js is loaded.\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjsloaded');\n      };\n      script.onerror = function () {\n        /**\n         * Fired when vtt.js was not loaded due to an error\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjserror');\n      };\n      this.on('dispose', function () {\n        script.onload = null;\n        script.onerror = null;\n      });\n      // but have not loaded yet and we set it to true before the inject so that\n      // we don't overwrite the injected window.WebVTT if it loads right away\n      window.WebVTT = true;\n      this.el().parentNode.appendChild(script);\n    } else {\n      this.ready(this.addWebVttScript_);\n    }\n  };\n\n  /**\n   * Emulate texttracks\n   *\n   */\n\n\n  Tech.prototype.emulateTextTracks = function emulateTextTracks() {\n    var _this6 = this;\n\n    var tracks = this.textTracks();\n    var remoteTracks = this.remoteTextTracks();\n    var handleAddTrack = function handleAddTrack(e) {\n      return tracks.addTrack(e.track);\n    };\n    var handleRemoveTrack = function handleRemoveTrack(e) {\n      return tracks.removeTrack(e.track);\n    };\n\n    remoteTracks.on('addtrack', handleAddTrack);\n    remoteTracks.on('removetrack', handleRemoveTrack);\n\n    this.addWebVttScript_();\n\n    var updateDisplay = function updateDisplay() {\n      return _this6.trigger('texttrackchange');\n    };\n\n    var textTracksChanges = function textTracksChanges() {\n      updateDisplay();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n\n        track.removeEventListener('cuechange', updateDisplay);\n        if (track.mode === 'showing') {\n          track.addEventListener('cuechange', updateDisplay);\n        }\n      }\n    };\n\n    textTracksChanges();\n    tracks.addEventListener('change', textTracksChanges);\n    tracks.addEventListener('addtrack', textTracksChanges);\n    tracks.addEventListener('removetrack', textTracksChanges);\n\n    this.on('dispose', function () {\n      remoteTracks.off('addtrack', handleAddTrack);\n      remoteTracks.off('removetrack', handleRemoveTrack);\n      tracks.removeEventListener('change', textTracksChanges);\n      tracks.removeEventListener('addtrack', textTracksChanges);\n      tracks.removeEventListener('removetrack', textTracksChanges);\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n\n        track.removeEventListener('cuechange', updateDisplay);\n      }\n    });\n  };\n\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n\n\n  Tech.prototype.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!kind) {\n      throw new Error('TextTrack kind is required but was not provided');\n    }\n\n    return createTrackHelper(this, kind, label, language);\n  };\n\n  /**\n   * Create an emulated TextTrack for use by addRemoteTextTrack\n   *\n   * This is intended to be overridden by classes that inherit from\n   * Tech in order to create native or custom TextTracks.\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n\n\n  Tech.prototype.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    var track = mergeOptions(options, {\n      tech: this\n    });\n\n    return new REMOTE.remoteTextEl.TrackClass(track);\n  };\n\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n   *\n   * @param {Object} options\n   *        See {@link Tech#createRemoteTextTrack} for more detailed properties.\n   *\n   * @param {boolean} [manualCleanup=true]\n   *        - When false: the TextTrack will be automatically removed from the video\n   *          element whenever the source changes\n   *        - When True: The TextTrack will have to be cleaned up manually\n   *\n   * @return {HTMLTrackElement}\n   *         An Html Track Element.\n   *\n   * @deprecated The default functionality for this function will be equivalent\n   *             to \"manualCleanup=false\" in the future. The manualCleanup parameter will\n   *             also be removed.\n   */\n\n\n  Tech.prototype.addRemoteTextTrack = function addRemoteTextTrack() {\n    var _this7 = this;\n\n    var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    var manualCleanup = arguments[1];\n\n    var htmlTrackElement = this.createRemoteTextTrack(options);\n\n    if (manualCleanup !== true && manualCleanup !== false) {\n      // deprecation warning\n      log.warn('Calling addRemoteTextTrack without explicitly setting the \"manualCleanup\" parameter to `true` is deprecated and default to `false` in future version of video.js');\n      manualCleanup = true;\n    }\n\n    // store HTMLTrackElement and TextTrack to remote list\n    this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n    this.remoteTextTracks().addTrack(htmlTrackElement.track);\n\n    if (manualCleanup !== true) {\n      // create the TextTrackList if it doesn't exist\n      this.ready(function () {\n        return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);\n      });\n    }\n\n    return htmlTrackElement;\n  };\n\n  /**\n   * Remove a remote text track from the remote `TextTrackList`.\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` to remove from the `TextTrackList`\n   */\n\n\n  Tech.prototype.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track);\n\n    // remove HTMLTrackElement and TextTrack from remote list\n    this.remoteTextTrackEls().removeTrackElement_(trackElement);\n    this.remoteTextTracks().removeTrack(track);\n    this.autoRemoteTextTracks_.removeTrack(track);\n  };\n\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return {};\n  };\n\n  /**\n   * A method to set a poster from a `Tech`.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.setPoster = function setPoster() {};\n\n  /**\n   * A method to check for the presence of the 'playsinine' <video> attribute.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.playsinline = function playsinline() {};\n\n  /**\n   * A method to set or unset the 'playsinine' <video> attribute.\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.setPlaysinline = function setPlaysinline() {};\n\n  /*\n   * Check if the tech can support the given mime-type.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param  {string} type\n   *         The mimetype to check for support\n   *\n   * @return {string}\n   *         'probably', 'maybe', or empty string\n   *\n   * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n   *\n   * @abstract\n   */\n\n\n  Tech.prototype.canPlayType = function canPlayType() {\n    return '';\n  };\n\n  /**\n   * Check if the type is supported by this tech.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param {string} type\n   *        The media type to check\n   * @return {string} Returns the native video element's response\n   */\n\n\n  Tech.canPlayType = function canPlayType() {\n    return '';\n  };\n\n  /**\n   * Check if the tech can support the given source\n   * @param {Object} srcObj\n   *        The source object\n   * @param {Object} options\n   *        The options passed to the tech\n   * @return {string} 'probably', 'maybe', or '' (empty string)\n   */\n\n\n  Tech.canPlaySource = function canPlaySource(srcObj, options) {\n    return Tech.canPlayType(srcObj.type);\n  };\n\n  /*\n   * Return whether the argument is a Tech or not.\n   * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n   *\n   * @param {Object} component\n   *        The item to check\n   *\n   * @return {boolean}\n   *         Whether it is a tech or not\n   *         - True if it is a tech\n   *         - False if it is not\n   */\n\n\n  Tech.isTech = function isTech(component) {\n    return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n  };\n\n  /**\n   * Registers a `Tech` into a shared list for videojs.\n   *\n   * @param {string} name\n   *        Name of the `Tech` to register.\n   *\n   * @param {Object} tech\n   *        The `Tech` class to register.\n   */\n\n\n  Tech.registerTech = function registerTech(name, tech) {\n    if (!Tech.techs_) {\n      Tech.techs_ = {};\n    }\n\n    if (!Tech.isTech(tech)) {\n      throw new Error('Tech ' + name + ' must be a Tech');\n    }\n\n    if (!Tech.canPlayType) {\n      throw new Error('Techs must have a static canPlayType method on them');\n    }\n    if (!Tech.canPlaySource) {\n      throw new Error('Techs must have a static canPlaySource method on them');\n    }\n\n    name = toTitleCase(name);\n\n    Tech.techs_[name] = tech;\n    if (name !== 'Tech') {\n      // camel case the techName for use in techOrder\n      Tech.defaultTechOrder_.push(name);\n    }\n    return tech;\n  };\n\n  /**\n   * Get a `Tech` from the shared list by name.\n   *\n   * @param {string} name\n   *        `camelCase` or `TitleCase` name of the Tech to get\n   *\n   * @return {Tech|undefined}\n   *         The `Tech` or undefined if there was no tech with the name requsted.\n   */\n\n\n  Tech.getTech = function getTech(name) {\n    if (!name) {\n      return;\n    }\n\n    name = toTitleCase(name);\n\n    if (Tech.techs_ && Tech.techs_[name]) {\n      return Tech.techs_[name];\n    }\n\n    if (window && window.videojs && window.videojs[name]) {\n      log.warn('The ' + name + ' tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)');\n      return window.videojs[name];\n    }\n  };\n\n  return Tech;\n}(Component);\n\n/**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n/**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Tech.prototype[props.getterName] = function () {\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n\n/**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n/**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n/**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n/**\n * Boolean indicating wether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresVolumeControl = true;\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default\n */\nTech.prototype.featuresMuteControl = true;\n\n/**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresFullscreenResize = false;\n\n/**\n * Boolean indicating wether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresPlaybackRate = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the `progress` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresProgressEvents = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresSourceset = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the `timeupdate` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresTimeupdateEvents = false;\n\n/**\n * Boolean indicating wether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\nTech.prototype.featuresNativeTextTracks = false;\n\n/**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n *        The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\nTech.withSourceHandlers = function (_Tech) {\n\n  /**\n   * Register a source handler\n   *\n   * @param {Function} handler\n   *        The source handler class\n   *\n   * @param {number} [index]\n   *        Register it at the following index\n   */\n  _Tech.registerSourceHandler = function (handler, index) {\n    var handlers = _Tech.sourceHandlers;\n\n    if (!handlers) {\n      handlers = _Tech.sourceHandlers = [];\n    }\n\n    if (index === undefined) {\n      // add to the end of the list\n      index = handlers.length;\n    }\n\n    handlers.splice(index, 0, handler);\n  };\n\n  /**\n   * Check if the tech can support the given type. Also checks the\n   * Techs sourceHandlers.\n   *\n   * @param {string} type\n   *         The mimetype to check.\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  _Tech.canPlayType = function (type) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can = void 0;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canPlayType(type);\n\n      if (can) {\n        return can;\n      }\n    }\n\n    return '';\n  };\n\n  /**\n   * Returns the first source handler that supports the source.\n   *\n   * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {SourceHandler|null}\n   *          The first source handler that supports the source or null if\n   *          no SourceHandler supports the source\n   */\n  _Tech.selectSourceHandler = function (source, options) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can = void 0;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canHandleSource(source, options);\n\n      if (can) {\n        return handlers[i];\n      }\n    }\n\n    return null;\n  };\n\n  /**\n   * Check if the tech can support the given source.\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  _Tech.canPlaySource = function (srcObj, options) {\n    var sh = _Tech.selectSourceHandler(srcObj, options);\n\n    if (sh) {\n      return sh.canHandleSource(srcObj, options);\n    }\n\n    return '';\n  };\n\n  /**\n   * When using a source handler, prefer its implementation of\n   * any function normally provided by the tech.\n   */\n  var deferrable = ['seekable', 'seeking', 'duration'];\n\n  /**\n   * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n   * function if it exists, with a fallback to the Techs seekable function.\n   *\n   * @method _Tech.seekable\n   */\n\n  /**\n   * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n   * function if it exists, otherwise it will fallback to the techs duration function.\n   *\n   * @method _Tech.duration\n   */\n\n  deferrable.forEach(function (fnName) {\n    var originalFn = this[fnName];\n\n    if (typeof originalFn !== 'function') {\n      return;\n    }\n\n    this[fnName] = function () {\n      if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n        return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n      }\n      return originalFn.apply(this, arguments);\n    };\n  }, _Tech.prototype);\n\n  /**\n   * Create a function for setting the source using a source object\n   * and source handlers.\n   * Should never be called unless a source handler was found.\n   *\n   * @param {Tech~SourceObject} source\n   *        A source object with src and type keys\n   */\n  _Tech.prototype.setSource = function (source) {\n    var sh = _Tech.selectSourceHandler(source, this.options_);\n\n    if (!sh) {\n      // Fall back to a native source hander when unsupported sources are\n      // deliberately set\n      if (_Tech.nativeSourceHandler) {\n        sh = _Tech.nativeSourceHandler;\n      } else {\n        log.error('No source hander found for the current source.');\n      }\n    }\n\n    // Dispose any existing source handler\n    this.disposeSourceHandler();\n    this.off('dispose', this.disposeSourceHandler);\n\n    if (sh !== _Tech.nativeSourceHandler) {\n      this.currentSource_ = source;\n    }\n\n    this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n    this.on('dispose', this.disposeSourceHandler);\n  };\n\n  /**\n   * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n   *\n   * @listens Tech#dispose\n   */\n  _Tech.prototype.disposeSourceHandler = function () {\n    // if we have a source and get another one\n    // then we are loading something new\n    // than clear all of our current tracks\n    if (this.currentSource_) {\n      this.clearTracks(['audio', 'video']);\n      this.currentSource_ = null;\n    }\n\n    // always clean up auto-text tracks\n    this.cleanupAutoTextTracks();\n\n    if (this.sourceHandler_) {\n\n      if (this.sourceHandler_.dispose) {\n        this.sourceHandler_.dispose();\n      }\n\n      this.sourceHandler_ = null;\n    }\n  };\n};\n\n// The base Tech class needs to be registered as a Component. It is the only\n// Tech that can be registered as a Component.\nComponent.registerComponent('Tech', Tech);\nTech.registerTech('Tech', Tech);\n\n/**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\nTech.defaultTechOrder_ = [];\n\nvar middlewares = {};\nvar middlewareInstances = {};\n\nvar TERMINATOR = {};\n\nfunction use(type, middleware) {\n  middlewares[type] = middlewares[type] || [];\n  middlewares[type].push(middleware);\n}\n\n\n\nfunction setSource(player, src, next) {\n  player.setTimeout(function () {\n    return setSourceHelper(src, middlewares[src.type], next, player);\n  }, 1);\n}\n\nfunction setTech(middleware, tech) {\n  middleware.forEach(function (mw) {\n    return mw.setTech && mw.setTech(tech);\n  });\n}\n\n/**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n */\nfunction get$1(middleware, tech, method) {\n  return middleware.reduceRight(middlewareIterator(method), tech[method]());\n}\n\n/**\n * Takes the argument given to the player and calls the setter method on each\n * middlware from left to right to the tech.\n */\nfunction set$1(middleware, tech, method, arg) {\n  return tech[method](middleware.reduce(middlewareIterator(method), arg));\n}\n\n/**\n * Takes the argument given to the player and calls the `call` version of the method\n * on each middleware from left to right.\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n */\nfunction mediate(middleware, tech, method) {\n  var arg = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;\n\n  var callMethod = 'call' + toTitleCase(method);\n  var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n  var terminated = middlewareValue === TERMINATOR;\n  var returnValue = terminated ? null : tech[method](middlewareValue);\n\n  executeRight(middleware, method, returnValue, terminated);\n\n  return returnValue;\n}\n\nvar allowedGetters = {\n  buffered: 1,\n  currentTime: 1,\n  duration: 1,\n  seekable: 1,\n  played: 1,\n  paused: 1\n};\n\nvar allowedSetters = {\n  setCurrentTime: 1\n};\n\nvar allowedMediators = {\n  play: 1,\n  pause: 1\n};\n\nfunction middlewareIterator(method) {\n  return function (value, mw) {\n    // if the previous middleware terminated, pass along the termination\n    if (value === TERMINATOR) {\n      return TERMINATOR;\n    }\n\n    if (mw[method]) {\n      return mw[method](value);\n    }\n\n    return value;\n  };\n}\n\nfunction executeRight(mws, method, value, terminated) {\n  for (var i = mws.length - 1; i >= 0; i--) {\n    var mw = mws[i];\n\n    if (mw[method]) {\n      mw[method](terminated, value);\n    }\n  }\n}\n\nfunction clearCacheForPlayer(player) {\n  middlewareInstances[player.id()] = null;\n}\n\n/**\n * {\n *  [playerId]: [[mwFactory, mwInstance], ...]\n * }\n */\nfunction getOrCreateFactory(player, mwFactory) {\n  var mws = middlewareInstances[player.id()];\n  var mw = null;\n\n  if (mws === undefined || mws === null) {\n    mw = mwFactory(player);\n    middlewareInstances[player.id()] = [[mwFactory, mw]];\n    return mw;\n  }\n\n  for (var i = 0; i < mws.length; i++) {\n    var _mws$i = mws[i],\n        mwf = _mws$i[0],\n        mwi = _mws$i[1];\n\n\n    if (mwf !== mwFactory) {\n      continue;\n    }\n\n    mw = mwi;\n  }\n\n  if (mw === null) {\n    mw = mwFactory(player);\n    mws.push([mwFactory, mw]);\n  }\n\n  return mw;\n}\n\nfunction setSourceHelper() {\n  var src = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n  var middleware = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];\n  var next = arguments[2];\n  var player = arguments[3];\n  var acc = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : [];\n  var lastRun = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : false;\n  var mwFactory = middleware[0],\n      mwrest = middleware.slice(1);\n\n  // if mwFactory is a string, then we're at a fork in the road\n\n  if (typeof mwFactory === 'string') {\n    setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun);\n\n    // if we have an mwFactory, call it with the player to get the mw,\n    // then call the mw's setSource method\n  } else if (mwFactory) {\n    var mw = getOrCreateFactory(player, mwFactory);\n\n    // if setSource isn't present, implicitly select this middleware\n    if (!mw.setSource) {\n      acc.push(mw);\n      return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n    }\n\n    mw.setSource(assign({}, src), function (err, _src) {\n\n      // something happened, try the next middleware on the current level\n      // make sure to use the old src\n      if (err) {\n        return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n      }\n\n      // we've succeeded, now we need to go deeper\n      acc.push(mw);\n\n      // if it's the same type, continue down the current chain\n      // otherwise, we want to go down the new chain\n      setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n    });\n  } else if (mwrest.length) {\n    setSourceHelper(src, mwrest, next, player, acc, lastRun);\n  } else if (lastRun) {\n    next(src, acc);\n  } else {\n    setSourceHelper(src, middlewares['*'], next, player, acc, true);\n  }\n}\n\n/**\n * Mimetypes\n *\n * @see http://hul.harvard.edu/ois/////systems/wax/wax-public-help/mimetypes.htm\n * @typedef Mimetypes~Kind\n * @enum\n */\nvar MimetypesKind = {\n  opus: 'video/ogg',\n  ogv: 'video/ogg',\n  mp4: 'video/mp4',\n  mov: 'video/mp4',\n  m4v: 'video/mp4',\n  mkv: 'video/x-matroska',\n  mp3: 'audio/mpeg',\n  aac: 'audio/aac',\n  oga: 'audio/ogg',\n  m3u8: 'application/x-mpegURL'\n};\n\n/**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n *        The url to the src\n *\n * @return {string}\n *         return the mimetype if it was known or empty string otherwise\n */\nvar getMimetype = function getMimetype() {\n  var src = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';\n\n  var ext = getFileExtension(src);\n  var mimetype = MimetypesKind[ext.toLowerCase()];\n\n  return mimetype || '';\n};\n\n/**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param {Player} player\n *        The player object\n *\n * @param {string} src\n *        The source string\n *\n * @return {string}\n *         The type that was found\n */\nvar findMimetype = function findMimetype(player, src) {\n  if (!src) {\n    return '';\n  }\n\n  // 1. check for the type in the `source` cache\n  if (player.cache_.source.src === src && player.cache_.source.type) {\n    return player.cache_.source.type;\n  }\n\n  // 2. see if we have this source in our `currentSources` cache\n  var matchingSources = player.cache_.sources.filter(function (s) {\n    return s.src === src;\n  });\n\n  if (matchingSources.length) {\n    return matchingSources[0].type;\n  }\n\n  // 3. look for the src url in source elements and use the type there\n  var sources = player.$$('source');\n\n  for (var i = 0; i < sources.length; i++) {\n    var s = sources[i];\n\n    if (s.type && s.src && s.src === src) {\n      return s.type;\n    }\n  }\n\n  // 4. finally fallback to our list of mime types based on src url extension\n  return getMimetype(src);\n};\n\n/**\n * @module filter-source\n */\n/**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n *        The src object to filter\n *\n * @return {Tech~SourceObject[]}\n *         An array of sourceobjects containing only valid sources\n *\n * @private\n */\nvar filterSource = function filterSource(src) {\n  // traverse array\n  if (Array.isArray(src)) {\n    var newsrc = [];\n\n    src.forEach(function (srcobj) {\n      srcobj = filterSource(srcobj);\n\n      if (Array.isArray(srcobj)) {\n        newsrc = newsrc.concat(srcobj);\n      } else if (isObject(srcobj)) {\n        newsrc.push(srcobj);\n      }\n    });\n\n    src = newsrc;\n  } else if (typeof src === 'string' && src.trim()) {\n    // convert string into object\n    src = [fixSource({ src: src })];\n  } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n    // src is already valid\n    src = [fixSource(src)];\n  } else {\n    // invalid source, turn it into an empty array\n    src = [];\n  }\n\n  return src;\n};\n\n/**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n *        The src object to check\n * @return {Tech~SourceObject}\n *        src Object with known type\n */\nfunction fixSource(src) {\n  var mimetype = getMimetype(src.src);\n\n  if (!src.type && mimetype) {\n    src.type = mimetype;\n  }\n\n  return src;\n}\n\n/**\n * @file loader.js\n */\n/**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n\nvar MediaLoader = function (_Component) {\n  inherits(MediaLoader, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value stroe of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function that is run when this component is ready.\n   */\n  function MediaLoader(player, options, ready) {\n    classCallCheck(this, MediaLoader);\n\n    // MediaLoader has no element\n    var options_ = mergeOptions({ createEl: false }, options);\n\n    // If there are no sources when the player is initialized,\n    // load the first supported playback technology.\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options_, ready));\n\n    if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n      for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n        var techName = toTitleCase(j[i]);\n        var tech = Tech.getTech(techName);\n\n        // Support old behavior of techs being registered as components.\n        // Remove once that deprecated behavior is removed.\n        if (!techName) {\n          tech = Component.getComponent(techName);\n        }\n\n        // Check if the browser supports this technology\n        if (tech && tech.isSupported()) {\n          player.loadTech_(techName);\n          break;\n        }\n      }\n    } else {\n      // Loop through playback technologies (HTML5, Flash) and check for support.\n      // Then load the best source.\n      // A few assumptions here:\n      //   All playback technologies respect preload false.\n      player.src(options.playerOptions.sources);\n    }\n    return _this;\n  }\n\n  return MediaLoader;\n}(Component);\n\nComponent.registerComponent('MediaLoader', MediaLoader);\n\n/**\n * @file button.js\n */\n/**\n * Clickable Component which is clickable or keyboard actionable,\n * but is not a native HTML button.\n *\n * @extends Component\n */\n\nvar ClickableComponent = function (_Component) {\n  inherits(ClickableComponent, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ClickableComponent(player, options) {\n    classCallCheck(this, ClickableComponent);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.emitTapEvents();\n\n    _this.enable();\n    return _this;\n  }\n\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tag=div]\n   *        The element's node type.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  ClickableComponent.prototype.createEl = function createEl$$1() {\n    var tag = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'div';\n    var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    props = assign({\n      innerHTML: '<span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>',\n      className: this.buildCSSClass(),\n      tabIndex: 0\n    }, props);\n\n    if (tag === 'button') {\n      log.error('Creating a ClickableComponent with an HTML element of ' + tag + ' is not supported; use a Button instead.');\n    }\n\n    // Add ARIA attributes for clickable element which is not a native HTML button\n    attributes = assign({\n      role: 'button'\n    }, attributes);\n\n    this.tabIndex_ = props.tabIndex;\n\n    var el = _Component.prototype.createEl.call(this, tag, props, attributes);\n\n    this.createControlTextEl(el);\n\n    return el;\n  };\n\n  ClickableComponent.prototype.dispose = function dispose() {\n    // remove controlTextEl_ on dipose\n    this.controlTextEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create a control text element on this `Component`\n   *\n   * @param {Element} [el]\n   *        Parent element for the control text.\n   *\n   * @return {Element}\n   *         The control text element that gets created.\n   */\n\n\n  ClickableComponent.prototype.createControlTextEl = function createControlTextEl(el) {\n    this.controlTextEl_ = createEl('span', {\n      className: 'vjs-control-text'\n    }, {\n      // let the screen reader user know that the text of the element may change\n      'aria-live': 'polite'\n    });\n\n    if (el) {\n      el.appendChild(this.controlTextEl_);\n    }\n\n    this.controlText(this.controlText_, el);\n\n    return this.controlTextEl_;\n  };\n\n  /**\n   * Get or set the localize text to use for the controls on the `Component`.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n\n\n  ClickableComponent.prototype.controlText = function controlText(text) {\n    var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.el();\n\n    if (text === undefined) {\n      return this.controlText_ || 'Need Text';\n    }\n\n    var localizedText = this.localize(text);\n\n    this.controlText_ = text;\n    textContent(this.controlTextEl_, localizedText);\n    if (!this.nonIconControl) {\n      // Set title attribute if only an icon is shown\n      el.setAttribute('title', localizedText);\n    }\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  ClickableComponent.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-control vjs-button ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Enable this `Component`s element.\n   */\n\n\n  ClickableComponent.prototype.enable = function enable() {\n    if (!this.enabled_) {\n      this.enabled_ = true;\n      this.removeClass('vjs-disabled');\n      this.el_.setAttribute('aria-disabled', 'false');\n      if (typeof this.tabIndex_ !== 'undefined') {\n        this.el_.setAttribute('tabIndex', this.tabIndex_);\n      }\n      this.on(['tap', 'click'], this.handleClick);\n      this.on('focus', this.handleFocus);\n      this.on('blur', this.handleBlur);\n    }\n  };\n\n  /**\n   * Disable this `Component`s element.\n   */\n\n\n  ClickableComponent.prototype.disable = function disable() {\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.el_.setAttribute('aria-disabled', 'true');\n    if (typeof this.tabIndex_ !== 'undefined') {\n      this.el_.removeAttribute('tabIndex');\n    }\n    this.off(['tap', 'click'], this.handleClick);\n    this.off('focus', this.handleFocus);\n    this.off('blur', this.handleBlur);\n  };\n\n  /**\n   * This gets called when a `ClickableComponent` gets:\n   * - Clicked (via the `click` event, listening starts in the constructor)\n   * - Tapped (via the `tap` event, listening starts in the constructor)\n   * - The following things happen in order:\n   *   1. {@link ClickableComponent#handleFocus} is called via a `focus` event on the\n   *      `ClickableComponent`.\n   *   2. {@link ClickableComponent#handleFocus} adds a listener for `keydown` on using\n   *      {@link ClickableComponent#handleKeyPress}.\n   *   3. `ClickableComponent` has not had a `blur` event (`blur` means that focus was lost). The user presses\n   *      the space or enter key.\n   *   4. {@link ClickableComponent#handleKeyPress} calls this function with the `keydown`\n   *      event as a parameter.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @abstract\n   */\n\n\n  ClickableComponent.prototype.handleClick = function handleClick(event) {};\n\n  /**\n   * This gets called when a `ClickableComponent` gains focus via a `focus` event.\n   * Turns on listening for `keydown` events. When they happen it\n   * calls `this.handleKeyPress`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `focus` event that caused this function to be called.\n   *\n   * @listens focus\n   */\n\n\n  ClickableComponent.prototype.handleFocus = function handleFocus(event) {\n    on(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  /**\n   * Called when this ClickableComponent has focus and a key gets pressed down. By\n   * default it will call `this.handleClick` when the key is space or enter.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n\n\n  ClickableComponent.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Support Space (32) or Enter (13) key operation to fire a click event\n    if (event.which === 32 || event.which === 13) {\n      event.preventDefault();\n      this.trigger('click');\n    } else if (_Component.prototype.handleKeyPress) {\n\n      // Pass keypress handling up for unsupported keys\n      _Component.prototype.handleKeyPress.call(this, event);\n    }\n  };\n\n  /**\n   * Called when a `ClickableComponent` loses focus. Turns off the listener for\n   * `keydown` events. Which Stops `this.handleKeyPress` from getting called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n\n\n  ClickableComponent.prototype.handleBlur = function handleBlur(event) {\n    off(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  return ClickableComponent;\n}(Component);\n\nComponent.registerComponent('ClickableComponent', ClickableComponent);\n\n/**\n * @file poster-image.js\n */\n/**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n\nvar PosterImage = function (_ClickableComponent) {\n  inherits(PosterImage, _ClickableComponent);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PosterImage(player, options) {\n    classCallCheck(this, PosterImage);\n\n    var _this = possibleConstructorReturn(this, _ClickableComponent.call(this, player, options));\n\n    _this.update();\n    player.on('posterchange', bind(_this, _this.update));\n    return _this;\n  }\n\n  /**\n   * Clean up and dispose of the `PosterImage`.\n   */\n\n\n  PosterImage.prototype.dispose = function dispose() {\n    this.player().off('posterchange', this.update);\n    _ClickableComponent.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create the `PosterImage`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  PosterImage.prototype.createEl = function createEl$$1() {\n    var el = createEl('div', {\n      className: 'vjs-poster',\n\n      // Don't want poster to be tabbable.\n      tabIndex: -1\n    });\n\n    // To ensure the poster image resizes while maintaining its original aspect\n    // ratio, use a div with `background-size` when available. For browsers that\n    // do not support `background-size` (e.g. IE8), fall back on using a regular\n    // img element.\n    if (!BACKGROUND_SIZE_SUPPORTED) {\n      this.fallbackImg_ = createEl('img');\n      el.appendChild(this.fallbackImg_);\n    }\n\n    return el;\n  };\n\n  /**\n   * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n   *\n   * @listens Player#posterchange\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `Player#posterchange` event that triggered this function.\n   */\n\n\n  PosterImage.prototype.update = function update(event) {\n    var url = this.player().poster();\n\n    this.setSrc(url);\n\n    // If there's no poster source we should display:none on this component\n    // so it's not still clickable or right-clickable\n    if (url) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  /**\n   * Set the source of the `PosterImage` depending on the display method.\n   *\n   * @param {string} url\n   *        The URL to the source for the `PosterImage`.\n   */\n\n\n  PosterImage.prototype.setSrc = function setSrc(url) {\n    if (this.fallbackImg_) {\n      this.fallbackImg_.src = url;\n    } else {\n      var backgroundImage = '';\n\n      // Any falsey values should stay as an empty string, otherwise\n      // this will throw an extra error\n      if (url) {\n        backgroundImage = 'url(\"' + url + '\")';\n      }\n\n      this.el_.style.backgroundImage = backgroundImage;\n    }\n  };\n\n  /**\n   * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n   * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n   *\n   * @listens tap\n   * @listens click\n   * @listens keydown\n   *\n   * @param {EventTarget~Event} event\n   +        The `click`, `tap` or `keydown` event that caused this function to be called.\n   */\n\n\n  PosterImage.prototype.handleClick = function handleClick(event) {\n    // We don't want a click to trigger playback when controls are disabled\n    if (!this.player_.controls()) {\n      return;\n    }\n\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  return PosterImage;\n}(ClickableComponent);\n\nComponent.registerComponent('PosterImage', PosterImage);\n\n/**\n * @file text-track-display.js\n */\nvar darkGray = '#222';\nvar lightGray = '#ccc';\nvar fontMap = {\n  monospace: 'monospace',\n  sansSerif: 'sans-serif',\n  serif: 'serif',\n  monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n  monospaceSerif: '\"Courier New\", monospace',\n  proportionalSansSerif: 'sans-serif',\n  proportionalSerif: 'serif',\n  casual: '\"Comic Sans MS\", Impact, fantasy',\n  script: '\"Monotype Corsiva\", cursive',\n  smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n};\n\n/**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n *        Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n *        Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\nfunction constructColor(color, opacity) {\n  var hex = void 0;\n\n  if (color.length === 4) {\n    // color looks like \"#f0e\"\n    hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n  } else if (color.length === 7) {\n    // color looks like \"#f604e2\"\n    hex = color.slice(1);\n  } else {\n    throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n  }\n  return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n}\n\n/**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n *        The DOM element to be styled.\n *\n * @param {string} style\n *        The CSS property on the element that should be styled.\n *\n * @param {string} rule\n *        The style rule that should be applied to the property.\n *\n * @private\n */\nfunction tryUpdateStyle(el, style, rule) {\n  try {\n    el.style[style] = rule;\n  } catch (e) {\n\n    // Satisfies linter.\n    return;\n  }\n}\n\n/**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n\nvar TextTrackDisplay = function (_Component) {\n  inherits(TextTrackDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when `TextTrackDisplay` is ready.\n   */\n  function TextTrackDisplay(player, options, ready) {\n    classCallCheck(this, TextTrackDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options, ready));\n\n    var updateDisplayHandler = bind(_this, _this.updateDisplay);\n\n    player.on('loadstart', bind(_this, _this.toggleDisplay));\n    player.on('texttrackchange', updateDisplayHandler);\n    player.on('loadstart', bind(_this, _this.preselectTrack));\n\n    // This used to be called during player init, but was causing an error\n    // if a track should show by default and the display hadn't loaded yet.\n    // Should probably be moved to an external track loader when we support\n    // tracks that don't need a display.\n    player.ready(bind(_this, function () {\n      if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n        this.hide();\n        return;\n      }\n\n      player.on('fullscreenchange', updateDisplayHandler);\n      player.on('playerresize', updateDisplayHandler);\n\n      if (window.addEventListener) {\n        window.addEventListener('orientationchange', updateDisplayHandler);\n      }\n      player.on('dispose', function () {\n        return window.removeEventListener('orientationchange', updateDisplayHandler);\n      });\n\n      var tracks = this.options_.playerOptions.tracks || [];\n\n      for (var i = 0; i < tracks.length; i++) {\n        this.player_.addRemoteTextTrack(tracks[i], true);\n      }\n\n      this.preselectTrack();\n    }));\n    return _this;\n  }\n\n  /**\n  * Preselect a track following this precedence:\n  * - matches the previously selected {@link TextTrack}'s language and kind\n  * - matches the previously selected {@link TextTrack}'s language only\n  * - is the first default captions track\n  * - is the first default descriptions track\n  *\n  * @listens Player#loadstart\n  */\n\n\n  TextTrackDisplay.prototype.preselectTrack = function preselectTrack() {\n    var modes = { captions: 1, subtitles: 1 };\n    var trackList = this.player_.textTracks();\n    var userPref = this.player_.cache_.selectedLanguage;\n    var firstDesc = void 0;\n    var firstCaptions = void 0;\n    var preferredTrack = void 0;\n\n    for (var i = 0; i < trackList.length; i++) {\n      var track = trackList[i];\n\n      if (userPref && userPref.enabled && userPref.language === track.language) {\n        // Always choose the track that matches both language and kind\n        if (track.kind === userPref.kind) {\n          preferredTrack = track;\n          // or choose the first track that matches language\n        } else if (!preferredTrack) {\n          preferredTrack = track;\n        }\n\n        // clear everything if offTextTrackMenuItem was clicked\n      } else if (userPref && !userPref.enabled) {\n        preferredTrack = null;\n        firstDesc = null;\n        firstCaptions = null;\n      } else if (track['default']) {\n        if (track.kind === 'descriptions' && !firstDesc) {\n          firstDesc = track;\n        } else if (track.kind in modes && !firstCaptions) {\n          firstCaptions = track;\n        }\n      }\n    }\n\n    // The preferredTrack matches the user preference and takes\n    // precendence over all the other tracks.\n    // So, display the preferredTrack before the first default track\n    // and the subtitles/captions track before the descriptions track\n    if (preferredTrack) {\n      preferredTrack.mode = 'showing';\n    } else if (firstCaptions) {\n      firstCaptions.mode = 'showing';\n    } else if (firstDesc) {\n      firstDesc.mode = 'showing';\n    }\n  };\n\n  /**\n   * Turn display of {@link TextTrack}'s from the current state into the other state.\n   * There are only two states:\n   * - 'shown'\n   * - 'hidden'\n   *\n   * @listens Player#loadstart\n   */\n\n\n  TextTrackDisplay.prototype.toggleDisplay = function toggleDisplay() {\n    if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  };\n\n  /**\n   * Create the {@link Component}'s DOM element.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  TextTrackDisplay.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-text-track-display'\n    }, {\n      'aria-live': 'off',\n      'aria-atomic': 'true'\n    });\n  };\n\n  /**\n   * Clear all displayed {@link TextTrack}s.\n   */\n\n\n  TextTrackDisplay.prototype.clearDisplay = function clearDisplay() {\n    if (typeof window.WebVTT === 'function') {\n      window.WebVTT.processCues(window, [], this.el_);\n    }\n  };\n\n  /**\n   * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n   * a {@link Player#fullscreenchange} is fired.\n   *\n   * @listens Player#texttrackchange\n   * @listens Player#fullscreenchange\n   */\n\n\n  TextTrackDisplay.prototype.updateDisplay = function updateDisplay() {\n    var tracks = this.player_.textTracks();\n\n    this.clearDisplay();\n\n    // Track display prioritization model: if multiple tracks are 'showing',\n    //  display the first 'subtitles' or 'captions' track which is 'showing',\n    //  otherwise display the first 'descriptions' track which is 'showing'\n\n    var descriptionsTrack = null;\n    var captionsSubtitlesTrack = null;\n    var i = tracks.length;\n\n    while (i--) {\n      var track = tracks[i];\n\n      if (track.mode === 'showing') {\n        if (track.kind === 'descriptions') {\n          descriptionsTrack = track;\n        } else {\n          captionsSubtitlesTrack = track;\n        }\n      }\n    }\n\n    if (captionsSubtitlesTrack) {\n      if (this.getAttribute('aria-live') !== 'off') {\n        this.setAttribute('aria-live', 'off');\n      }\n      this.updateForTrack(captionsSubtitlesTrack);\n    } else if (descriptionsTrack) {\n      if (this.getAttribute('aria-live') !== 'assertive') {\n        this.setAttribute('aria-live', 'assertive');\n      }\n      this.updateForTrack(descriptionsTrack);\n    }\n  };\n\n  /**\n   * Add an {@link Texttrack} to to the {@link Tech}s {@link TextTrackList}.\n   *\n   * @param {TextTrack} track\n   *        Text track object to be added to the list.\n   */\n\n\n  TextTrackDisplay.prototype.updateForTrack = function updateForTrack(track) {\n    if (typeof window.WebVTT !== 'function' || !track.activeCues) {\n      return;\n    }\n\n    var cues = [];\n\n    for (var _i = 0; _i < track.activeCues.length; _i++) {\n      cues.push(track.activeCues[_i]);\n    }\n\n    window.WebVTT.processCues(window, cues, this.el_);\n\n    if (!this.player_.textTrackSettings) {\n      return;\n    }\n\n    var overrides = this.player_.textTrackSettings.getValues();\n\n    var i = cues.length;\n\n    while (i--) {\n      var cue = cues[i];\n\n      if (!cue) {\n        continue;\n      }\n\n      var cueDiv = cue.displayState;\n\n      if (overrides.color) {\n        cueDiv.firstChild.style.color = overrides.color;\n      }\n      if (overrides.textOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n      }\n      if (overrides.backgroundColor) {\n        cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n      }\n      if (overrides.backgroundOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n      }\n      if (overrides.windowColor) {\n        if (overrides.windowOpacity) {\n          tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n        } else {\n          cueDiv.style.backgroundColor = overrides.windowColor;\n        }\n      }\n      if (overrides.edgeStyle) {\n        if (overrides.edgeStyle === 'dropshadow') {\n          cueDiv.firstChild.style.textShadow = '2px 2px 3px ' + darkGray + ', 2px 2px 4px ' + darkGray + ', 2px 2px 5px ' + darkGray;\n        } else if (overrides.edgeStyle === 'raised') {\n          cueDiv.firstChild.style.textShadow = '1px 1px ' + darkGray + ', 2px 2px ' + darkGray + ', 3px 3px ' + darkGray;\n        } else if (overrides.edgeStyle === 'depressed') {\n          cueDiv.firstChild.style.textShadow = '1px 1px ' + lightGray + ', 0 1px ' + lightGray + ', -1px -1px ' + darkGray + ', 0 -1px ' + darkGray;\n        } else if (overrides.edgeStyle === 'uniform') {\n          cueDiv.firstChild.style.textShadow = '0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray;\n        }\n      }\n      if (overrides.fontPercent && overrides.fontPercent !== 1) {\n        var fontSize = window.parseFloat(cueDiv.style.fontSize);\n\n        cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n        cueDiv.style.height = 'auto';\n        cueDiv.style.top = 'auto';\n        cueDiv.style.bottom = '2px';\n      }\n      if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n        if (overrides.fontFamily === 'small-caps') {\n          cueDiv.firstChild.style.fontVariant = 'small-caps';\n        } else {\n          cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n        }\n      }\n    }\n  };\n\n  return TextTrackDisplay;\n}(Component);\n\nComponent.registerComponent('TextTrackDisplay', TextTrackDisplay);\n\n/**\n * @file loading-spinner.js\n */\n/**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n\nvar LoadingSpinner = function (_Component) {\n  inherits(LoadingSpinner, _Component);\n\n  function LoadingSpinner() {\n    classCallCheck(this, LoadingSpinner);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the `LoadingSpinner`s DOM element.\n   *\n   * @return {Element}\n   *         The dom element that gets created.\n   */\n  LoadingSpinner.prototype.createEl = function createEl$$1() {\n    var isAudio = this.player_.isAudio();\n    var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n    var controlText = createEl('span', {\n      className: 'vjs-control-text',\n      innerHTML: this.localize('{1} is loading.', [playerType])\n    });\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-loading-spinner',\n      dir: 'ltr'\n    });\n\n    el.appendChild(controlText);\n\n    return el;\n  };\n\n  return LoadingSpinner;\n}(Component);\n\nComponent.registerComponent('LoadingSpinner', LoadingSpinner);\n\n/**\n * @file button.js\n */\n/**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n\nvar Button = function (_ClickableComponent) {\n  inherits(Button, _ClickableComponent);\n\n  function Button() {\n    classCallCheck(this, Button);\n    return possibleConstructorReturn(this, _ClickableComponent.apply(this, arguments));\n  }\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} [tag=\"button\"]\n   *        The element's node type. This argument is IGNORED: no matter what\n   *        is passed, it will always create a `button` element.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  Button.prototype.createEl = function createEl(tag) {\n    var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    tag = 'button';\n\n    props = assign({\n      innerHTML: '<span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>',\n      className: this.buildCSSClass()\n    }, props);\n\n    // Add attributes for button element\n    attributes = assign({\n\n      // Necessary since the default button type is \"submit\"\n      type: 'button'\n    }, attributes);\n\n    var el = Component.prototype.createEl.call(this, tag, props, attributes);\n\n    this.createControlTextEl(el);\n\n    return el;\n  };\n\n  /**\n   * Add a child `Component` inside of this `Button`.\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   *\n   * @deprecated since version 5\n   */\n\n\n  Button.prototype.addChild = function addChild(child) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    var className = this.constructor.name;\n\n    log.warn('Adding an actionable (user controllable) child to a Button (' + className + ') is not supported; use a ClickableComponent instead.');\n\n    // Avoid the error message generated by ClickableComponent's addChild method\n    return Component.prototype.addChild.call(this, child, options);\n  };\n\n  /**\n   * Enable the `Button` element so that it can be activated or clicked. Use this with\n   * {@link Button#disable}.\n   */\n\n\n  Button.prototype.enable = function enable() {\n    _ClickableComponent.prototype.enable.call(this);\n    this.el_.removeAttribute('disabled');\n  };\n\n  /**\n   * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n   * {@link Button#enable}.\n   */\n\n\n  Button.prototype.disable = function disable() {\n    _ClickableComponent.prototype.disable.call(this);\n    this.el_.setAttribute('disabled', 'disabled');\n  };\n\n  /**\n   * This gets called when a `Button` has focus and `keydown` is triggered via a key\n   * press.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to get called.\n   *\n   * @listens keydown\n   */\n\n\n  Button.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Ignore Space (32) or Enter (13) key operation, which is handled by the browser for a button.\n    if (event.which === 32 || event.which === 13) {\n      return;\n    }\n\n    // Pass keypress handling up for unsupported keys\n    _ClickableComponent.prototype.handleKeyPress.call(this, event);\n  };\n\n  return Button;\n}(ClickableComponent);\n\nComponent.registerComponent('Button', Button);\n\n/**\n * @file big-play-button.js\n */\n/**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n\nvar BigPlayButton = function (_Button) {\n  inherits(BigPlayButton, _Button);\n\n  function BigPlayButton(player, options) {\n    classCallCheck(this, BigPlayButton);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.mouseused_ = false;\n\n    _this.on('mousedown', _this.handleMouseDown);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n   */\n\n\n  BigPlayButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-big-play-button';\n  };\n\n  /**\n   * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  BigPlayButton.prototype.handleClick = function handleClick(event) {\n    var playPromise = this.player_.play();\n\n    // exit early if clicked via the mouse\n    if (this.mouseused_ && event.clientX && event.clientY) {\n      silencePromise(playPromise);\n      return;\n    }\n\n    var cb = this.player_.getChild('controlBar');\n    var playToggle = cb && cb.getChild('playToggle');\n\n    if (!playToggle) {\n      this.player_.focus();\n      return;\n    }\n\n    var playFocus = function playFocus() {\n      return playToggle.focus();\n    };\n\n    if (isPromise(playPromise)) {\n      playPromise.then(playFocus, function () {});\n    } else {\n      this.setTimeout(playFocus, 1);\n    }\n  };\n\n  BigPlayButton.prototype.handleKeyPress = function handleKeyPress(event) {\n    this.mouseused_ = false;\n\n    _Button.prototype.handleKeyPress.call(this, event);\n  };\n\n  BigPlayButton.prototype.handleMouseDown = function handleMouseDown(event) {\n    this.mouseused_ = true;\n  };\n\n  return BigPlayButton;\n}(Button);\n\n/**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n */\n\n\nBigPlayButton.prototype.controlText_ = 'Play Video';\n\nComponent.registerComponent('BigPlayButton', BigPlayButton);\n\n/**\n * @file close-button.js\n */\n/**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n\nvar CloseButton = function (_Button) {\n  inherits(CloseButton, _Button);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function CloseButton(player, options) {\n    classCallCheck(this, CloseButton);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.controlText(options && options.controlText || _this.localize('Close'));\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  CloseButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-close-button ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * This gets called when a `CloseButton` gets clicked. See\n   * {@link ClickableComponent#handleClick} for more information on when this will be\n   * triggered\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @fires CloseButton#close\n   */\n\n\n  CloseButton.prototype.handleClick = function handleClick(event) {\n\n    /**\n     * Triggered when the a `CloseButton` is clicked.\n     *\n     * @event CloseButton#close\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up to parents if there is no listener\n     */\n    this.trigger({ type: 'close', bubbles: false });\n  };\n\n  return CloseButton;\n}(Button);\n\nComponent.registerComponent('CloseButton', CloseButton);\n\n/**\n * @file play-toggle.js\n */\n/**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n\nvar PlayToggle = function (_Button) {\n  inherits(PlayToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlayToggle(player, options) {\n    classCallCheck(this, PlayToggle);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.on(player, 'play', _this.handlePlay);\n    _this.on(player, 'pause', _this.handlePause);\n    _this.on(player, 'ended', _this.handleEnded);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  PlayToggle.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-play-control ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * This gets called when an `PlayToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  PlayToggle.prototype.handleClick = function handleClick(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  /**\n   * This gets called once after the video has ended and the user seeks so that\n   * we can change the replay button back to a play button.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#seeked\n   */\n\n\n  PlayToggle.prototype.handleSeeked = function handleSeeked(event) {\n    this.removeClass('vjs-ended');\n\n    if (this.player_.paused()) {\n      this.handlePause(event);\n    } else {\n      this.handlePlay(event);\n    }\n  };\n\n  /**\n   * Add the vjs-playing class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#play\n   */\n\n\n  PlayToggle.prototype.handlePlay = function handlePlay(event) {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing');\n    // change the button text to \"Pause\"\n    this.controlText('Pause');\n  };\n\n  /**\n   * Add the vjs-paused class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#pause\n   */\n\n\n  PlayToggle.prototype.handlePause = function handlePause(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    // change the button text to \"Play\"\n    this.controlText('Play');\n  };\n\n  /**\n   * Add the vjs-ended class to the element so it can change appearance\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  PlayToggle.prototype.handleEnded = function handleEnded(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-ended');\n    // change the button text to \"Replay\"\n    this.controlText('Replay');\n\n    // on the next seek remove the replay button\n    this.one(this.player_, 'seeked', this.handleSeeked);\n  };\n\n  return PlayToggle;\n}(Button);\n\n/**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlayToggle.prototype.controlText_ = 'Play';\n\nComponent.registerComponent('PlayToggle', PlayToggle);\n\n/**\n * @file format-time.js\n * @module format-time\n */\n\n/**\n* Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in seconds)\n* will force a number of leading zeros to cover the length of the guide.\n*\n* @param {number} seconds\n*        Number of seconds to be turned into a string\n*\n* @param {number} guide\n*        Number (in seconds) to model the string after\n*\n* @return {string}\n*         Time formatted as H:MM:SS or M:SS\n*/\nvar defaultImplementation = function defaultImplementation(seconds, guide) {\n  seconds = seconds < 0 ? 0 : seconds;\n  var s = Math.floor(seconds % 60);\n  var m = Math.floor(seconds / 60 % 60);\n  var h = Math.floor(seconds / 3600);\n  var gm = Math.floor(guide / 60 % 60);\n  var gh = Math.floor(guide / 3600);\n\n  // handle invalid times\n  if (isNaN(seconds) || seconds === Infinity) {\n    // '-' is false for all relational operators (e.g. <, >=) so this setting\n    // will add the minimum number of fields specified by the guide\n    h = m = s = '-';\n  }\n\n  // Check if we need to show hours\n  h = h > 0 || gh > 0 ? h + ':' : '';\n\n  // If hours are showing, we may need to add a leading zero.\n  // Always show at least one digit of minutes.\n  m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':';\n\n  // Check if leading zero is need for seconds\n  s = s < 10 ? '0' + s : s;\n\n  return h + m + s;\n};\n\nvar implementation = defaultImplementation;\n\n/**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n *        A function which will be used in place of the default formatTime implementation.\n *        Will receive the current time in seconds and the guide (in seconds) as arguments.\n */\nfunction setFormatTime(customImplementation) {\n  implementation = customImplementation;\n}\n\n/**\n * Resets formatTime to the default implementation.\n */\nfunction resetFormatTime() {\n  implementation = defaultImplementation;\n}\n\nvar formatTime = function (seconds) {\n  var guide = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : seconds;\n\n  return implementation(seconds, guide);\n};\n\n/**\n * @file time-display.js\n */\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar TimeDisplay = function (_Component) {\n  inherits(TimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeDisplay(player, options) {\n    classCallCheck(this, TimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.throttledUpdateContent = throttle(bind(_this, _this.updateContent), 25);\n    _this.on(player, 'timeupdate', _this.throttledUpdateContent);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  TimeDisplay.prototype.createEl = function createEl$$1(plainName) {\n    var className = this.buildCSSClass();\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: className + ' vjs-time-control vjs-control',\n      innerHTML: '<span class=\"vjs-control-text\">' + this.localize(this.labelText_) + '\\xA0</span>'\n    });\n\n    this.contentEl_ = createEl('span', {\n      className: className + '-display'\n    }, {\n      // tell screen readers not to automatically read the time as it changes\n      'aria-live': 'off'\n    });\n\n    this.updateTextNode_();\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  TimeDisplay.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.textNode_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Updates the \"remaining time\" text node with new content using the\n   * contents of the `formattedTime_` property.\n   *\n   * @private\n   */\n\n\n  TimeDisplay.prototype.updateTextNode_ = function updateTextNode_() {\n    if (!this.contentEl_) {\n      return;\n    }\n\n    while (this.contentEl_.firstChild) {\n      this.contentEl_.removeChild(this.contentEl_.firstChild);\n    }\n\n    this.textNode_ = document.createTextNode(this.formattedTime_ || this.formatTime_(0));\n    this.contentEl_.appendChild(this.textNode_);\n  };\n\n  /**\n   * Generates a formatted time for this component to use in display.\n   *\n   * @param  {number} time\n   *         A numeric time, in seconds.\n   *\n   * @return {string}\n   *         A formatted time\n   *\n   * @private\n   */\n\n\n  TimeDisplay.prototype.formatTime_ = function formatTime_(time) {\n    return formatTime(time);\n  };\n\n  /**\n   * Updates the time display text node if it has what was passed in changed\n   * the formatted time.\n   *\n   * @param {number} time\n   *        The time to update to\n   *\n   * @private\n   */\n\n\n  TimeDisplay.prototype.updateFormattedTime_ = function updateFormattedTime_(time) {\n    var formattedTime = this.formatTime_(time);\n\n    if (formattedTime === this.formattedTime_) {\n      return;\n    }\n\n    this.formattedTime_ = formattedTime;\n    this.requestAnimationFrame(this.updateTextNode_);\n  };\n\n  /**\n   * To be filled out in the child class, should update the displayed time\n   * in accordance with the fact that the current time has changed.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate`  event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   */\n\n\n  TimeDisplay.prototype.updateContent = function updateContent(event) {};\n\n  return TimeDisplay;\n}(Component);\n\n/**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nTimeDisplay.prototype.labelText_ = 'Time';\n\n/**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nTimeDisplay.prototype.controlText_ = 'Time';\n\nComponent.registerComponent('TimeDisplay', TimeDisplay);\n\n/**\n * @file current-time-display.js\n */\n/**\n * Displays the current time\n *\n * @extends Component\n */\n\nvar CurrentTimeDisplay = function (_TimeDisplay) {\n  inherits(CurrentTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CurrentTimeDisplay(player, options) {\n    classCallCheck(this, CurrentTimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));\n\n    _this.on(player, 'ended', _this.handleEnded);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  CurrentTimeDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-current-time';\n  };\n\n  /**\n   * Update current time display\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` event that caused this function to run.\n   *\n   * @listens Player#timeupdate\n   */\n\n\n  CurrentTimeDisplay.prototype.updateContent = function updateContent(event) {\n    // Allows for smooth scrubbing, when player can't keep up.\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n\n    this.updateFormattedTime_(time);\n  };\n\n  /**\n   * When the player fires ended there should be no time left. Sadly\n   * this is not always the case, lets make it seem like that is the case\n   * for users.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  CurrentTimeDisplay.prototype.handleEnded = function handleEnded(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n    this.updateFormattedTime_(this.player_.duration());\n  };\n\n  return CurrentTimeDisplay;\n}(TimeDisplay);\n\n/**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nCurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n\n/**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nCurrentTimeDisplay.prototype.controlText_ = 'Current Time';\n\nComponent.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n\n/**\n * @file duration-display.js\n */\n/**\n * Displays the duration\n *\n * @extends Component\n */\n\nvar DurationDisplay = function (_TimeDisplay) {\n  inherits(DurationDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function DurationDisplay(player, options) {\n    classCallCheck(this, DurationDisplay);\n\n    // we do not want to/need to throttle duration changes,\n    // as they should always display the changed duration as\n    // it has changed\n    var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));\n\n    _this.on(player, 'durationchange', _this.updateContent);\n\n    // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n    // listeners could have broken dependent applications/libraries. These\n    // can likely be removed for 7.0.\n    _this.on(player, 'loadedmetadata', _this.throttledUpdateContent);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  DurationDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-duration';\n  };\n\n  /**\n   * Update duration time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n   *        this function to be called.\n   *\n   * @listens Player#durationchange\n   * @listens Player#timeupdate\n   * @listens Player#loadedmetadata\n   */\n\n\n  DurationDisplay.prototype.updateContent = function updateContent(event) {\n    var duration = this.player_.duration();\n\n    if (duration && this.duration_ !== duration) {\n      this.duration_ = duration;\n      this.updateFormattedTime_(duration);\n    }\n  };\n\n  return DurationDisplay;\n}(TimeDisplay);\n\n/**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nDurationDisplay.prototype.labelText_ = 'Duration';\n\n/**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nDurationDisplay.prototype.controlText_ = 'Duration';\n\nComponent.registerComponent('DurationDisplay', DurationDisplay);\n\n/**\n * @file time-divider.js\n */\n/**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n\nvar TimeDivider = function (_Component) {\n  inherits(TimeDivider, _Component);\n\n  function TimeDivider() {\n    classCallCheck(this, TimeDivider);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the component's DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  TimeDivider.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-control vjs-time-divider',\n      innerHTML: '<div><span>/</span></div>'\n    });\n  };\n\n  return TimeDivider;\n}(Component);\n\nComponent.registerComponent('TimeDivider', TimeDivider);\n\n/**\n * @file remaining-time-display.js\n */\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar RemainingTimeDisplay = function (_TimeDisplay) {\n  inherits(RemainingTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function RemainingTimeDisplay(player, options) {\n    classCallCheck(this, RemainingTimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _TimeDisplay.call(this, player, options));\n\n    _this.on(player, 'durationchange', _this.throttledUpdateContent);\n    _this.on(player, 'ended', _this.handleEnded);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  RemainingTimeDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-remaining-time';\n  };\n\n  /**\n   * The remaining time display prefixes numbers with a \"minus\" character.\n   *\n   * @param  {number} time\n   *         A numeric time, in seconds.\n   *\n   * @return {string}\n   *         A formatted time\n   *\n   * @private\n   */\n\n\n  RemainingTimeDisplay.prototype.formatTime_ = function formatTime_(time) {\n    // TODO: The \"-\" should be decorative, and not announced by a screen reader\n    return '-' + _TimeDisplay.prototype.formatTime_.call(this, time);\n  };\n\n  /**\n   * Update remaining time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `durationchange` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   * @listens Player#durationchange\n   */\n\n\n  RemainingTimeDisplay.prototype.updateContent = function updateContent(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n\n    // @deprecated We should only use remainingTimeDisplay\n    // as of video.js 7\n    if (this.player_.remainingTimeDisplay) {\n      this.updateFormattedTime_(this.player_.remainingTimeDisplay());\n    } else {\n      this.updateFormattedTime_(this.player_.remainingTime());\n    }\n  };\n\n  /**\n   * When the player fires ended there should be no time left. Sadly\n   * this is not always the case, lets make it seem like that is the case\n   * for users.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  RemainingTimeDisplay.prototype.handleEnded = function handleEnded(event) {\n    if (!this.player_.duration()) {\n      return;\n    }\n    this.updateFormattedTime_(0);\n  };\n\n  return RemainingTimeDisplay;\n}(TimeDisplay);\n\n/**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nRemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n\n/**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\nRemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\n\nComponent.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n\n/**\n * @file live-display.js\n */\n// TODO - Future make it click to snap to live\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar LiveDisplay = function (_Component) {\n  inherits(LiveDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LiveDisplay(player, options) {\n    classCallCheck(this, LiveDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.updateShowing();\n    _this.on(_this.player(), 'durationchange', _this.updateShowing);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  LiveDisplay.prototype.createEl = function createEl$$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-live-control vjs-control'\n    });\n\n    this.contentEl_ = createEl('div', {\n      className: 'vjs-live-display',\n      innerHTML: '<span class=\"vjs-control-text\">' + this.localize('Stream Type') + '\\xA0</span>' + this.localize('LIVE')\n    }, {\n      'aria-live': 'off'\n    });\n\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  LiveDisplay.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n   * it accordingly\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#durationchange} event that caused this function to run.\n   *\n   * @listens Player#durationchange\n   */\n\n\n  LiveDisplay.prototype.updateShowing = function updateShowing(event) {\n    if (this.player().duration() === Infinity) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  return LiveDisplay;\n}(Component);\n\nComponent.registerComponent('LiveDisplay', LiveDisplay);\n\n/**\n * @file slider.js\n */\n/**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n\nvar Slider = function (_Component) {\n  inherits(Slider, _Component);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function Slider(player, options) {\n    classCallCheck(this, Slider);\n\n    // Set property names to bar to match with the child Slider class is looking for\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.bar = _this.getChild(_this.options_.barName);\n\n    // Set a horizontal or vertical class on the slider depending on the slider type\n    _this.vertical(!!_this.options_.vertical);\n\n    _this.enable();\n    return _this;\n  }\n\n  /**\n   * Are controls are currently enabled for this slider or not.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  Slider.prototype.enabled = function enabled() {\n    return this.enabled_;\n  };\n\n  /**\n   * Enable controls for this slider if they are disabled\n   */\n\n\n  Slider.prototype.enable = function enable() {\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on('mousedown', this.handleMouseDown);\n    this.on('touchstart', this.handleMouseDown);\n    this.on('focus', this.handleFocus);\n    this.on('blur', this.handleBlur);\n    this.on('click', this.handleClick);\n\n    this.on(this.player_, 'controlsvisible', this.update);\n\n    if (this.playerEvent) {\n      this.on(this.player_, this.playerEvent, this.update);\n    }\n\n    this.removeClass('disabled');\n    this.setAttribute('tabindex', 0);\n\n    this.enabled_ = true;\n  };\n\n  /**\n   * Disable controls for this slider if they are enabled\n   */\n\n\n  Slider.prototype.disable = function disable() {\n    if (!this.enabled()) {\n      return;\n    }\n    var doc = this.bar.el_.ownerDocument;\n\n    this.off('mousedown', this.handleMouseDown);\n    this.off('touchstart', this.handleMouseDown);\n    this.off('focus', this.handleFocus);\n    this.off('blur', this.handleBlur);\n    this.off('click', this.handleClick);\n    this.off(this.player_, 'controlsvisible', this.update);\n    this.off(doc, 'mousemove', this.handleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchmove', this.handleMouseMove);\n    this.off(doc, 'touchend', this.handleMouseUp);\n    this.removeAttribute('tabindex');\n\n    this.addClass('disabled');\n\n    if (this.playerEvent) {\n      this.off(this.player_, this.playerEvent, this.update);\n    }\n    this.enabled_ = false;\n  };\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} type\n   *        Type of element to create.\n   *\n   * @param {Object} [props={}]\n   *        List of properties in Object form.\n   *\n   * @param {Object} [attributes={}]\n   *        list of attributes in Object form.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  Slider.prototype.createEl = function createEl$$1(type) {\n    var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    var attributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};\n\n    // Add the slider element class to all sub classes\n    props.className = props.className + ' vjs-slider';\n    props = assign({\n      tabIndex: 0\n    }, props);\n\n    attributes = assign({\n      'role': 'slider',\n      'aria-valuenow': 0,\n      'aria-valuemin': 0,\n      'aria-valuemax': 100,\n      'tabIndex': 0\n    }, attributes);\n\n    return _Component.prototype.createEl.call(this, type, props, attributes);\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   * @fires Slider#slideractive\n   */\n\n\n  Slider.prototype.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.bar.el_.ownerDocument;\n\n    if (event.type === 'mousedown') {\n      event.preventDefault();\n    }\n    // Do not call preventDefault() on touchstart in Chrome\n    // to avoid console warnings. Use a 'touch-action: none' style\n    // instead to prevent unintented scrolling.\n    // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n    if (event.type === 'touchstart' && !IS_CHROME) {\n      event.preventDefault();\n    }\n    blockTextSelection();\n\n    this.addClass('vjs-sliding');\n    /**\n     * Triggered when the slider is in an active state\n     *\n     * @event Slider#slideractive\n     * @type {EventTarget~Event}\n     */\n    this.trigger('slideractive');\n\n    this.on(doc, 'mousemove', this.handleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchmove', this.handleMouseMove);\n    this.on(doc, 'touchend', this.handleMouseUp);\n\n    this.handleMouseMove(event);\n  };\n\n  /**\n   * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n   * The `mousemove` and `touchmove` events will only only trigger this function during\n   * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n   * {@link Slider#handleMouseUp}.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n   *        this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n\n\n  Slider.prototype.handleMouseMove = function handleMouseMove(event) {};\n\n  /**\n   * Handle `mouseup` or `touchend` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   * @fires Slider#sliderinactive\n   */\n\n\n  Slider.prototype.handleMouseUp = function handleMouseUp() {\n    var doc = this.bar.el_.ownerDocument;\n\n    unblockTextSelection();\n\n    this.removeClass('vjs-sliding');\n    /**\n     * Triggered when the slider is no longer in an active state.\n     *\n     * @event Slider#sliderinactive\n     * @type {EventTarget~Event}\n     */\n    this.trigger('sliderinactive');\n\n    this.off(doc, 'mousemove', this.handleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchmove', this.handleMouseMove);\n    this.off(doc, 'touchend', this.handleMouseUp);\n\n    this.update();\n  };\n\n  /**\n   * Update the progress bar of the `Slider`.\n   *\n   * @returns {number}\n   *          The percentage of progress the progress bar represents as a\n   *          number from 0 to 1.\n   */\n\n\n  Slider.prototype.update = function update() {\n\n    // In VolumeBar init we have a setTimeout for update that pops and update\n    // to the end of the execution stack. The player is destroyed before then\n    // update will cause an error\n    if (!this.el_) {\n      return;\n    }\n\n    // If scrubbing, we could use a cached value to make the handle keep up\n    // with the user's mouse. On HTML5 browsers scrubbing is really smooth, but\n    // some flash players are slow, so we might want to utilize this later.\n    // var progress =  (this.player_.scrubbing()) ? this.player_.getCache().currentTime / this.player_.duration() : this.player_.currentTime() / this.player_.duration();\n    var progress = this.getPercent();\n    var bar = this.bar;\n\n    // If there's no bar...\n    if (!bar) {\n      return;\n    }\n\n    // Protect against no duration and other division issues\n    if (typeof progress !== 'number' || progress !== progress || progress < 0 || progress === Infinity) {\n      progress = 0;\n    }\n\n    // Convert to a percentage for setting\n    var percentage = (progress * 100).toFixed(2) + '%';\n    var style = bar.el().style;\n\n    // Set the new bar width or height\n    if (this.vertical()) {\n      style.height = percentage;\n    } else {\n      style.width = percentage;\n    }\n\n    return progress;\n  };\n\n  /**\n   * Calculate distance for slider\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @return {number}\n   *         The current position of the Slider.\n   *         - postition.x for vertical `Slider`s\n   *         - postition.y for horizontal `Slider`s\n   */\n\n\n  Slider.prototype.calculateDistance = function calculateDistance(event) {\n    var position = getPointerPosition(this.el_, event);\n\n    if (this.vertical()) {\n      return position.y;\n    }\n    return position.x;\n  };\n\n  /**\n   * Handle a `focus` event on this `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `focus` event that caused this function to run.\n   *\n   * @listens focus\n   */\n\n\n  Slider.prototype.handleFocus = function handleFocus() {\n    this.on(this.bar.el_.ownerDocument, 'keydown', this.handleKeyPress);\n  };\n\n  /**\n   * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down\n   * arrow keys. This function will only be called when the slider has focus. See\n   * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n   *\n   * @param {EventTarget~Event} event\n   *        the `keydown` event that caused this function to run.\n   *\n   * @listens keydown\n   */\n\n\n  Slider.prototype.handleKeyPress = function handleKeyPress(event) {\n    // Left and Down Arrows\n    if (event.which === 37 || event.which === 40) {\n      event.preventDefault();\n      this.stepBack();\n\n      // Up and Right Arrows\n    } else if (event.which === 38 || event.which === 39) {\n      event.preventDefault();\n      this.stepForward();\n    }\n  };\n\n  /**\n   * Handle a `blur` event on this `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to run.\n   *\n   * @listens blur\n   */\n\n  Slider.prototype.handleBlur = function handleBlur() {\n    this.off(this.bar.el_.ownerDocument, 'keydown', this.handleKeyPress);\n  };\n\n  /**\n   * Listener for click events on slider, used to prevent clicks\n   *   from bubbling up to parent elements like button menus.\n   *\n   * @param {Object} event\n   *        Event that caused this object to run\n   */\n\n\n  Slider.prototype.handleClick = function handleClick(event) {\n    event.stopImmediatePropagation();\n    event.preventDefault();\n  };\n\n  /**\n   * Get/set if slider is horizontal for vertical\n   *\n   * @param {boolean} [bool]\n   *        - true if slider is vertical,\n   *        - false is horizontal\n   *\n   * @return {boolean}\n   *         - true if slider is vertical, and getting\n   *         - false if the slider is horizontal, and getting\n   */\n\n\n  Slider.prototype.vertical = function vertical(bool) {\n    if (bool === undefined) {\n      return this.vertical_ || false;\n    }\n\n    this.vertical_ = !!bool;\n\n    if (this.vertical_) {\n      this.addClass('vjs-slider-vertical');\n    } else {\n      this.addClass('vjs-slider-horizontal');\n    }\n  };\n\n  return Slider;\n}(Component);\n\nComponent.registerComponent('Slider', Slider);\n\n/**\n * @file load-progress-bar.js\n */\n/**\n * Shows loading progress\n *\n * @extends Component\n */\n\nvar LoadProgressBar = function (_Component) {\n  inherits(LoadProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LoadProgressBar(player, options) {\n    classCallCheck(this, LoadProgressBar);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.partEls_ = [];\n    _this.on(player, 'progress', _this.update);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  LoadProgressBar.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-load-progress',\n      innerHTML: '<span class=\"vjs-control-text\"><span>' + this.localize('Loaded') + '</span>: 0%</span>'\n    });\n  };\n\n  LoadProgressBar.prototype.dispose = function dispose() {\n    this.partEls_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Update progress bar\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `progress` event that caused this function to run.\n   *\n   * @listens Player#progress\n   */\n\n\n  LoadProgressBar.prototype.update = function update(event) {\n    var buffered = this.player_.buffered();\n    var duration = this.player_.duration();\n    var bufferedEnd = this.player_.bufferedEnd();\n    var children = this.partEls_;\n\n    // get the percent width of a time compared to the total end\n    var percentify = function percentify(time, end) {\n      // no NaN\n      var percent = time / end || 0;\n\n      return (percent >= 1 ? 1 : percent) * 100 + '%';\n    };\n\n    // update the width of the progress bar\n    this.el_.style.width = percentify(bufferedEnd, duration);\n\n    // add child elements to represent the individual buffered time ranges\n    for (var i = 0; i < buffered.length; i++) {\n      var start = buffered.start(i);\n      var end = buffered.end(i);\n      var part = children[i];\n\n      if (!part) {\n        part = this.el_.appendChild(createEl());\n        children[i] = part;\n      }\n\n      // set the percent based on the width of the progress bar (bufferedEnd)\n      part.style.left = percentify(start, bufferedEnd);\n      part.style.width = percentify(end - start, bufferedEnd);\n    }\n\n    // remove unused buffered range elements\n    for (var _i = children.length; _i > buffered.length; _i--) {\n      this.el_.removeChild(children[_i - 1]);\n    }\n    children.length = buffered.length;\n  };\n\n  return LoadProgressBar;\n}(Component);\n\nComponent.registerComponent('LoadProgressBar', LoadProgressBar);\n\n/**\n * @file time-tooltip.js\n */\n/**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n\nvar TimeTooltip = function (_Component) {\n  inherits(TimeTooltip, _Component);\n\n  function TimeTooltip() {\n    classCallCheck(this, TimeTooltip);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the time tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  TimeTooltip.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-tooltip'\n    });\n  };\n\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n\n\n  TimeTooltip.prototype.update = function update(seekBarRect, seekBarPoint, content) {\n    var tooltipRect = getBoundingClientRect(this.el_);\n    var playerRect = getBoundingClientRect(this.player_.el());\n    var seekBarPointPx = seekBarRect.width * seekBarPoint;\n\n    // do nothing if either rect isn't available\n    // for example, if the player isn't in the DOM for testing\n    if (!playerRect || !tooltipRect) {\n      return;\n    }\n\n    // This is the space left of the `seekBarPoint` available within the bounds\n    // of the player. We calculate any gap between the left edge of the player\n    // and the left edge of the `SeekBar` and add the number of pixels in the\n    // `SeekBar` before hitting the `seekBarPoint`\n    var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx;\n\n    // This is the space right of the `seekBarPoint` available within the bounds\n    // of the player. We calculate the number of pixels from the `seekBarPoint`\n    // to the right edge of the `SeekBar` and add to that any gap between the\n    // right edge of the `SeekBar` and the player.\n    var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right);\n\n    // This is the number of pixels by which the tooltip will need to be pulled\n    // further to the right to center it over the `seekBarPoint`.\n    var pullTooltipBy = tooltipRect.width / 2;\n\n    // Adjust the `pullTooltipBy` distance to the left or right depending on\n    // the results of the space calculations above.\n    if (spaceLeftOfPoint < pullTooltipBy) {\n      pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n    } else if (spaceRightOfPoint < pullTooltipBy) {\n      pullTooltipBy = spaceRightOfPoint;\n    }\n\n    // Due to the imprecision of decimal/ratio based calculations and varying\n    // rounding behaviors, there are cases where the spacing adjustment is off\n    // by a pixel or two. This adds insurance to these calculations.\n    if (pullTooltipBy < 0) {\n      pullTooltipBy = 0;\n    } else if (pullTooltipBy > tooltipRect.width) {\n      pullTooltipBy = tooltipRect.width;\n    }\n\n    this.el_.style.right = '-' + pullTooltipBy + 'px';\n    textContent(this.el_, content);\n  };\n\n  return TimeTooltip;\n}(Component);\n\nComponent.registerComponent('TimeTooltip', TimeTooltip);\n\n/**\n * @file play-progress-bar.js\n */\n/**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar PlayProgressBar = function (_Component) {\n  inherits(PlayProgressBar, _Component);\n\n  function PlayProgressBar() {\n    classCallCheck(this, PlayProgressBar);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  PlayProgressBar.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-play-progress vjs-slider-bar',\n      innerHTML: '<span class=\"vjs-control-text\"><span>' + this.localize('Progress') + '</span>: 0%</span>'\n    });\n  };\n\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n\n\n  PlayProgressBar.prototype.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    // If there is an existing rAF ID, cancel it so we don't over-queue.\n    if (this.rafId_) {\n      this.cancelAnimationFrame(this.rafId_);\n    }\n\n    this.rafId_ = this.requestAnimationFrame(function () {\n      var time = _this2.player_.scrubbing() ? _this2.player_.getCache().currentTime : _this2.player_.currentTime();\n\n      var content = formatTime(time, _this2.player_.duration());\n      var timeTooltip = _this2.getChild('timeTooltip');\n\n      if (timeTooltip) {\n        timeTooltip.update(seekBarRect, seekBarPoint, content);\n      }\n    });\n  };\n\n  return PlayProgressBar;\n}(Component);\n\n/**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n\n\nPlayProgressBar.prototype.options_ = {\n  children: []\n};\n\n// Time tooltips should not be added to a player on mobile devices or IE8\nif ((!IE_VERSION || IE_VERSION > 8) && !IS_IOS && !IS_ANDROID) {\n  PlayProgressBar.prototype.options_.children.push('timeTooltip');\n}\n\nComponent.registerComponent('PlayProgressBar', PlayProgressBar);\n\n/**\n * @file mouse-time-display.js\n */\n/**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar MouseTimeDisplay = function (_Component) {\n  inherits(MouseTimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseTimeDisplay(player, options) {\n    classCallCheck(this, MouseTimeDisplay);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.update = throttle(bind(_this, _this.update), 25);\n    return _this;\n  }\n\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  MouseTimeDisplay.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  };\n\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n\n\n  MouseTimeDisplay.prototype.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    // If there is an existing rAF ID, cancel it so we don't over-queue.\n    if (this.rafId_) {\n      this.cancelAnimationFrame(this.rafId_);\n    }\n\n    this.rafId_ = this.requestAnimationFrame(function () {\n      var duration = _this2.player_.duration();\n      var content = formatTime(seekBarPoint * duration, duration);\n\n      _this2.el_.style.left = seekBarRect.width * seekBarPoint + 'px';\n      _this2.getChild('timeTooltip').update(seekBarRect, seekBarPoint, content);\n    });\n  };\n\n  return MouseTimeDisplay;\n}(Component);\n\n/**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseTimeDisplay.prototype.options_ = {\n  children: ['timeTooltip']\n};\n\nComponent.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\n\n/**\n * @file seek-bar.js\n */\n// The number of seconds the `step*` functions move the timeline.\nvar STEP_SECONDS = 5;\n\n// The interval at which the bar should update as it progresses.\nvar UPDATE_REFRESH_INTERVAL = 30;\n\n/**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n\nvar SeekBar = function (_Slider) {\n  inherits(SeekBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekBar(player, options) {\n    classCallCheck(this, SeekBar);\n\n    var _this = possibleConstructorReturn(this, _Slider.call(this, player, options));\n\n    _this.setEventHandlers_();\n    return _this;\n  }\n\n  /**\n   * Sets the event handlers\n   *\n   * @private\n   */\n\n\n  SeekBar.prototype.setEventHandlers_ = function setEventHandlers_() {\n    var _this2 = this;\n\n    this.update = throttle(bind(this, this.update), UPDATE_REFRESH_INTERVAL);\n\n    this.on(this.player_, 'timeupdate', this.update);\n    this.on(this.player_, 'ended', this.handleEnded);\n\n    // when playing, let's ensure we smoothly update the play progress bar\n    // via an interval\n    this.updateInterval = null;\n\n    this.on(this.player_, ['playing'], function () {\n      _this2.clearInterval(_this2.updateInterval);\n\n      _this2.updateInterval = _this2.setInterval(function () {\n        _this2.requestAnimationFrame(function () {\n          _this2.update();\n        });\n      }, UPDATE_REFRESH_INTERVAL);\n    });\n\n    this.on(this.player_, ['ended', 'pause', 'waiting'], function () {\n      _this2.clearInterval(_this2.updateInterval);\n    });\n\n    this.on(this.player_, ['timeupdate', 'ended'], this.update);\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  SeekBar.prototype.createEl = function createEl$$1() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-holder'\n    }, {\n      'aria-label': this.localize('Progress Bar')\n    });\n  };\n\n  /**\n   * This function updates the play progress bar and accessiblity\n   * attributes to whatever is passed in.\n   *\n   * @param {number} currentTime\n   *        The currentTime value that should be used for accessiblity\n   *\n   * @param {number} percent\n   *        The percentage as a decimal that the bar should be filled from 0-1.\n   *\n   * @private\n   */\n\n\n  SeekBar.prototype.update_ = function update_(currentTime, percent) {\n    var duration = this.player_.duration();\n\n    // machine readable value of progress bar (percentage complete)\n    this.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));\n\n    // human readable value of progress bar (time complete)\n    this.el_.setAttribute('aria-valuetext', this.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));\n\n    // Update the `PlayProgressBar`.\n    this.bar.update(getBoundingClientRect(this.el_), percent);\n  };\n\n  /**\n   * Update the seek bar's UI.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   *\n   * @returns {number}\n   *          The current percent at a number from 0-1\n   */\n\n\n  SeekBar.prototype.update = function update(event) {\n    var percent = _Slider.prototype.update.call(this);\n\n    this.update_(this.getCurrentTime_(), percent);\n    return percent;\n  };\n\n  /**\n   * Get the value of current time but allows for smooth scrubbing,\n   * when player can't keep up.\n   *\n   * @return {number}\n   *         The current time value to display\n   *\n   * @private\n   */\n\n\n  SeekBar.prototype.getCurrentTime_ = function getCurrentTime_() {\n    return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n  };\n\n  /**\n   * We want the seek bar to be full on ended\n   * no matter what the actual internal values are. so we force it.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#ended\n   */\n\n\n  SeekBar.prototype.handleEnded = function handleEnded(event) {\n    this.update_(this.player_.duration(), 1);\n  };\n\n  /**\n   * Get the percentage of media played so far.\n   *\n   * @return {number}\n   *         The percentage of media played so far (0 to 1).\n   */\n\n\n  SeekBar.prototype.getPercent = function getPercent() {\n    var percent = this.getCurrentTime_() / this.player_.duration();\n\n    return percent >= 1 ? 1 : percent;\n  };\n\n  /**\n   * Handle mouse down on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n\n\n  SeekBar.prototype.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    // Stop event propagation to prevent double fire in progress-control.js\n    event.stopPropagation();\n    this.player_.scrubbing(true);\n\n    this.videoWasPlaying = !this.player_.paused();\n    this.player_.pause();\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  };\n\n  /**\n   * Handle mouse move on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this to run.\n   *\n   * @listens mousemove\n   */\n\n\n  SeekBar.prototype.handleMouseMove = function handleMouseMove(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    var newTime = this.calculateDistance(event) * this.player_.duration();\n\n    // Don't let video end while scrubbing.\n    if (newTime === this.player_.duration()) {\n      newTime = newTime - 0.1;\n    }\n\n    // Set new time (tell player to seek to new time)\n    this.player_.currentTime(newTime);\n  };\n\n  SeekBar.prototype.enable = function enable() {\n    _Slider.prototype.enable.call(this);\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.show();\n  };\n\n  SeekBar.prototype.disable = function disable() {\n    _Slider.prototype.disable.call(this);\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.hide();\n  };\n\n  /**\n   * Handle mouse up on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseup` event that caused this to run.\n   *\n   * @listens mouseup\n   */\n\n\n  SeekBar.prototype.handleMouseUp = function handleMouseUp(event) {\n    _Slider.prototype.handleMouseUp.call(this, event);\n\n    // Stop event propagation to prevent double fire in progress-control.js\n    if (event) {\n      event.stopPropagation();\n    }\n    this.player_.scrubbing(false);\n\n    /**\n     * Trigger timeupdate because we're done seeking and the time has changed.\n     * This is particularly useful for if the player is paused to time the time displays.\n     *\n     * @event Tech#timeupdate\n     * @type {EventTarget~Event}\n     */\n    this.player_.trigger({ type: 'timeupdate', target: this, manuallyTriggered: true });\n    if (this.videoWasPlaying) {\n      silencePromise(this.player_.play());\n    }\n  };\n\n  /**\n   * Move more quickly fast forward for keyboard-only users\n   */\n\n\n  SeekBar.prototype.stepForward = function stepForward() {\n    this.player_.currentTime(this.player_.currentTime() + STEP_SECONDS);\n  };\n\n  /**\n   * Move more quickly rewind for keyboard-only users\n   */\n\n\n  SeekBar.prototype.stepBack = function stepBack() {\n    this.player_.currentTime(this.player_.currentTime() - STEP_SECONDS);\n  };\n\n  /**\n   * Toggles the playback state of the player\n   * This gets called when enter or space is used on the seekbar\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called\n   *\n   */\n\n\n  SeekBar.prototype.handleAction = function handleAction(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  /**\n   * Called when this SeekBar has focus and a key gets pressed down. By\n   * default it will call `this.handleAction` when the key is space or enter.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n\n\n  SeekBar.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Support Space (32) or Enter (13) key operation to fire a click event\n    if (event.which === 32 || event.which === 13) {\n      event.preventDefault();\n      this.handleAction(event);\n    } else if (_Slider.prototype.handleKeyPress) {\n\n      // Pass keypress handling up for unsupported keys\n      _Slider.prototype.handleKeyPress.call(this, event);\n    }\n  };\n\n  return SeekBar;\n}(Slider);\n\n/**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n\n\nSeekBar.prototype.options_ = {\n  children: ['loadProgressBar', 'playProgressBar'],\n  barName: 'playProgressBar'\n};\n\n// MouseTimeDisplay tooltips should not be added to a player on mobile devices or IE8\nif ((!IE_VERSION || IE_VERSION > 8) && !IS_IOS && !IS_ANDROID) {\n  SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n}\n\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\nSeekBar.prototype.playerEvent = 'timeupdate';\n\nComponent.registerComponent('SeekBar', SeekBar);\n\n/**\n * @file progress-control.js\n */\n/**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n\nvar ProgressControl = function (_Component) {\n  inherits(ProgressControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ProgressControl(player, options) {\n    classCallCheck(this, ProgressControl);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.handleMouseMove = throttle(bind(_this, _this.handleMouseMove), 25);\n    _this.throttledHandleMouseSeek = throttle(bind(_this, _this.handleMouseSeek), 25);\n\n    _this.enable();\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  ProgressControl.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-control vjs-control'\n    });\n  };\n\n  /**\n   * When the mouse moves over the `ProgressControl`, the pointer position\n   * gets passed down to the `MouseTimeDisplay` component.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   */\n\n\n  ProgressControl.prototype.handleMouseMove = function handleMouseMove(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n      var seekBarEl = seekBar.el();\n      var seekBarRect = getBoundingClientRect(seekBarEl);\n      var seekBarPoint = getPointerPosition(seekBarEl, event).x;\n\n      // The default skin has a gap on either side of the `SeekBar`. This means\n      // that it's possible to trigger this behavior outside the boundaries of\n      // the `SeekBar`. This ensures we stay within it at all times.\n      if (seekBarPoint > 1) {\n        seekBarPoint = 1;\n      } else if (seekBarPoint < 0) {\n        seekBarPoint = 0;\n      }\n\n      if (mouseTimeDisplay) {\n        mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n      }\n    }\n  };\n\n  /**\n   * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n   *\n   * @method ProgressControl#throttledHandleMouseSeek\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   * @listen touchmove\n   */\n\n  /**\n   * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n\n\n  ProgressControl.prototype.handleMouseSeek = function handleMouseSeek(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseMove(event);\n    }\n  };\n\n  /**\n   * Are controls are currently enabled for this progress control.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  ProgressControl.prototype.enabled = function enabled() {\n    return this.enabled_;\n  };\n\n  /**\n   * Disable all controls on the progress control and its children\n   */\n\n\n  ProgressControl.prototype.disable = function disable() {\n    this.children().forEach(function (child) {\n      return child.disable && child.disable();\n    });\n\n    if (!this.enabled()) {\n      return;\n    }\n\n    this.off(['mousedown', 'touchstart'], this.handleMouseDown);\n    this.off(this.el_, 'mousemove', this.handleMouseMove);\n    this.handleMouseUp();\n\n    this.addClass('disabled');\n\n    this.enabled_ = false;\n  };\n\n  /**\n   * Enable all controls on the progress control and its children\n   */\n\n\n  ProgressControl.prototype.enable = function enable() {\n    this.children().forEach(function (child) {\n      return child.enable && child.enable();\n    });\n\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on(['mousedown', 'touchstart'], this.handleMouseDown);\n    this.on(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeClass('disabled');\n\n    this.enabled_ = true;\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n\n\n  ProgressControl.prototype.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseDown(event);\n    }\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchend', this.handleMouseUp);\n  };\n\n  /**\n   * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n\n\n  ProgressControl.prototype.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseUp(event);\n    }\n\n    this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchend', this.handleMouseUp);\n  };\n\n  return ProgressControl;\n}(Component);\n\n/**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n\n\nProgressControl.prototype.options_ = {\n  children: ['seekBar']\n};\n\nComponent.registerComponent('ProgressControl', ProgressControl);\n\n/**\n * @file fullscreen-toggle.js\n */\n/**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n\nvar FullscreenToggle = function (_Button) {\n  inherits(FullscreenToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function FullscreenToggle(player, options) {\n    classCallCheck(this, FullscreenToggle);\n\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    _this.on(player, 'fullscreenchange', _this.handleFullscreenChange);\n\n    if (document[FullscreenApi.fullscreenEnabled] === false) {\n      _this.disable();\n    }\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  FullscreenToggle.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-fullscreen-control ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Handles fullscreenchange on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#fullscreenchange} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#fullscreenchange\n   */\n\n\n  FullscreenToggle.prototype.handleFullscreenChange = function handleFullscreenChange(event) {\n    if (this.player_.isFullscreen()) {\n      this.controlText('Non-Fullscreen');\n    } else {\n      this.controlText('Fullscreen');\n    }\n  };\n\n  /**\n   * This gets called when an `FullscreenToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  FullscreenToggle.prototype.handleClick = function handleClick(event) {\n    if (!this.player_.isFullscreen()) {\n      this.player_.requestFullscreen();\n    } else {\n      this.player_.exitFullscreen();\n    }\n  };\n\n  return FullscreenToggle;\n}(Button);\n\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nFullscreenToggle.prototype.controlText_ = 'Fullscreen';\n\nComponent.registerComponent('FullscreenToggle', FullscreenToggle);\n\n/**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed  using the `vjs-hidden` class.\n *\n * @param {Component} self\n *        The component that should be hidden if volume is unsupported\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkVolumeSupport = function checkVolumeSupport(self, player) {\n  // hide volume controls when they're not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresVolumeControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresVolumeControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * @file volume-level.js\n */\n/**\n * Shows volume level\n *\n * @extends Component\n */\n\nvar VolumeLevel = function (_Component) {\n  inherits(VolumeLevel, _Component);\n\n  function VolumeLevel() {\n    classCallCheck(this, VolumeLevel);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  VolumeLevel.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-level',\n      innerHTML: '<span class=\"vjs-control-text\"></span>'\n    });\n  };\n\n  return VolumeLevel;\n}(Component);\n\nComponent.registerComponent('VolumeLevel', VolumeLevel);\n\n/**\n * @file volume-bar.js\n */\n// Required children\n/**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n\nvar VolumeBar = function (_Slider) {\n  inherits(VolumeBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeBar(player, options) {\n    classCallCheck(this, VolumeBar);\n\n    var _this = possibleConstructorReturn(this, _Slider.call(this, player, options));\n\n    _this.on('slideractive', _this.updateLastVolume_);\n    _this.on(player, 'volumechange', _this.updateARIAAttributes);\n    player.ready(function () {\n      return _this.updateARIAAttributes();\n    });\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  VolumeBar.prototype.createEl = function createEl$$1() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-bar vjs-slider-bar'\n    }, {\n      'aria-label': this.localize('Volume Level'),\n      'aria-live': 'polite'\n    });\n  };\n\n  /**\n   * Handle mouse down on volume bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n\n\n  VolumeBar.prototype.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  };\n\n  /**\n   * Handle movement events on the {@link VolumeMenuButton}.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @listens mousemove\n   */\n\n\n  VolumeBar.prototype.handleMouseMove = function handleMouseMove(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    this.checkMuted();\n    this.player_.volume(this.calculateDistance(event));\n  };\n\n  /**\n   * If the player is muted unmute it.\n   */\n\n\n  VolumeBar.prototype.checkMuted = function checkMuted() {\n    if (this.player_.muted()) {\n      this.player_.muted(false);\n    }\n  };\n\n  /**\n   * Get percent of volume level\n   *\n   * @return {number}\n   *         Volume level percent as a decimal number.\n   */\n\n\n  VolumeBar.prototype.getPercent = function getPercent() {\n    if (this.player_.muted()) {\n      return 0;\n    }\n    return this.player_.volume();\n  };\n\n  /**\n   * Increase volume level for keyboard users\n   */\n\n\n  VolumeBar.prototype.stepForward = function stepForward() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() + 0.1);\n  };\n\n  /**\n   * Decrease volume level for keyboard users\n   */\n\n\n  VolumeBar.prototype.stepBack = function stepBack() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() - 0.1);\n  };\n\n  /**\n   * Update ARIA accessibility attributes\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `volumechange` event that caused this function to run.\n   *\n   * @listens Player#volumechange\n   */\n\n\n  VolumeBar.prototype.updateARIAAttributes = function updateARIAAttributes(event) {\n    var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n\n    this.el_.setAttribute('aria-valuenow', ariaValue);\n    this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n  };\n\n  /**\n   * Returns the current value of the player volume as a percentage\n   *\n   * @private\n   */\n\n\n  VolumeBar.prototype.volumeAsPercentage_ = function volumeAsPercentage_() {\n    return Math.round(this.player_.volume() * 100);\n  };\n\n  /**\n   * When user starts dragging the VolumeBar, store the volume and listen for\n   * the end of the drag. When the drag ends, if the volume was set to zero,\n   * set lastVolume to the stored volume.\n   *\n   * @listens slideractive\n   * @private\n   */\n\n\n  VolumeBar.prototype.updateLastVolume_ = function updateLastVolume_() {\n    var _this2 = this;\n\n    var volumeBeforeDrag = this.player_.volume();\n\n    this.one('sliderinactive', function () {\n      if (_this2.player_.volume() === 0) {\n        _this2.player_.lastVolume_(volumeBeforeDrag);\n      }\n    });\n  };\n\n  return VolumeBar;\n}(Slider);\n\n/**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeBar.prototype.options_ = {\n  children: ['volumeLevel'],\n  barName: 'volumeLevel'\n};\n\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\nVolumeBar.prototype.playerEvent = 'volumechange';\n\nComponent.registerComponent('VolumeBar', VolumeBar);\n\n/**\n * @file volume-control.js\n */\n// Required children\n/**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n\nvar VolumeControl = function (_Component) {\n  inherits(VolumeControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumeControl(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, VolumeControl);\n\n    options.vertical = options.vertical || false;\n\n    // Pass the vertical option down to the VolumeBar if\n    // the VolumeBar is turned on.\n    if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n      options.volumeBar = options.volumeBar || {};\n      options.volumeBar.vertical = options.vertical;\n    }\n\n    // hide this control if volume support is missing\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    checkVolumeSupport(_this, player);\n\n    _this.throttledHandleMouseMove = throttle(bind(_this, _this.handleMouseMove), 25);\n\n    _this.on('mousedown', _this.handleMouseDown);\n    _this.on('touchstart', _this.handleMouseDown);\n\n    // while the slider is active (the mouse has been pressed down and\n    // is dragging) or in focus we do not want to hide the VolumeBar\n    _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {\n      _this.volumeBar.addClass('vjs-slider-active');\n      _this.addClass('vjs-slider-active');\n      _this.trigger('slideractive');\n    });\n\n    _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {\n      _this.volumeBar.removeClass('vjs-slider-active');\n      _this.removeClass('vjs-slider-active');\n      _this.trigger('sliderinactive');\n    });\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  VolumeControl.prototype.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-horizontal';\n\n    if (this.options_.vertical) {\n      orientationClass = 'vjs-volume-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-control vjs-control ' + orientationClass\n    });\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n\n\n  VolumeControl.prototype.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUp);\n    this.on(doc, 'touchend', this.handleMouseUp);\n  };\n\n  /**\n   * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n\n\n  VolumeControl.prototype.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n\n    this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUp);\n    this.off(doc, 'touchend', this.handleMouseUp);\n  };\n\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n\n\n  VolumeControl.prototype.handleMouseMove = function handleMouseMove(event) {\n    this.volumeBar.handleMouseMove(event);\n  };\n\n  return VolumeControl;\n}(Component);\n\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeControl.prototype.options_ = {\n  children: ['volumeBar']\n};\n\nComponent.registerComponent('VolumeControl', VolumeControl);\n\n/**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param {Component} self\n *        A reference to the mute toggle button\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkMuteSupport = function checkMuteSupport(self, player) {\n  // hide mute toggle button if it's not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresMuteControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresMuteControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * @file mute-toggle.js\n */\n/**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n\nvar MuteToggle = function (_Button) {\n  inherits(MuteToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MuteToggle(player, options) {\n    classCallCheck(this, MuteToggle);\n\n    // hide this control if volume support is missing\n    var _this = possibleConstructorReturn(this, _Button.call(this, player, options));\n\n    checkMuteSupport(_this, player);\n\n    _this.on(player, ['loadstart', 'volumechange'], _this.update);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  MuteToggle.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-mute-control ' + _Button.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * This gets called when an `MuteToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  MuteToggle.prototype.handleClick = function handleClick(event) {\n    var vol = this.player_.volume();\n    var lastVolume = this.player_.lastVolume_();\n\n    if (vol === 0) {\n      var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n\n      this.player_.volume(volumeToSet);\n      this.player_.muted(false);\n    } else {\n      this.player_.muted(this.player_.muted() ? false : true);\n    }\n  };\n\n  /**\n   * Update the `MuteToggle` button based on the state of `volume` and `muted`\n   * on the player.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#loadstart} event if this function was called\n   *        through an event.\n   *\n   * @listens Player#loadstart\n   * @listens Player#volumechange\n   */\n\n\n  MuteToggle.prototype.update = function update(event) {\n    this.updateIcon_();\n    this.updateControlText_();\n  };\n\n  /**\n   * Update the appearance of the `MuteToggle` icon.\n   *\n   * Possible states (given `level` variable below):\n   * - 0: crossed out\n   * - 1: zero bars of volume\n   * - 2: one bar of volume\n   * - 3: two bars of volume\n   *\n   * @private\n   */\n\n\n  MuteToggle.prototype.updateIcon_ = function updateIcon_() {\n    var vol = this.player_.volume();\n    var level = 3;\n\n    // in iOS when a player is loaded with muted attribute\n    // and volume is changed with a native mute button\n    // we want to make sure muted state is updated\n    if (IS_IOS) {\n      this.player_.muted(this.player_.tech_.el_.muted);\n    }\n\n    if (vol === 0 || this.player_.muted()) {\n      level = 0;\n    } else if (vol < 0.33) {\n      level = 1;\n    } else if (vol < 0.67) {\n      level = 2;\n    }\n\n    // TODO improve muted icon classes\n    for (var i = 0; i < 4; i++) {\n      removeClass(this.el_, 'vjs-vol-' + i);\n    }\n    addClass(this.el_, 'vjs-vol-' + level);\n  };\n\n  /**\n   * If `muted` has changed on the player, update the control text\n   * (`title` attribute on `vjs-mute-control` element and content of\n   * `vjs-control-text` element).\n   *\n   * @private\n   */\n\n\n  MuteToggle.prototype.updateControlText_ = function updateControlText_() {\n    var soundOff = this.player_.muted() || this.player_.volume() === 0;\n    var text = soundOff ? 'Unmute' : 'Mute';\n\n    if (this.controlText() !== text) {\n      this.controlText(text);\n    }\n  };\n\n  return MuteToggle;\n}(Button);\n\n/**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nMuteToggle.prototype.controlText_ = 'Mute';\n\nComponent.registerComponent('MuteToggle', MuteToggle);\n\n/**\n * @file volume-control.js\n */\n// Required children\n/**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n\nvar VolumePanel = function (_Component) {\n  inherits(VolumePanel, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumePanel(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, VolumePanel);\n\n    if (typeof options.inline !== 'undefined') {\n      options.inline = options.inline;\n    } else {\n      options.inline = true;\n    }\n\n    // pass the inline option down to the VolumeControl as vertical if\n    // the VolumeControl is on.\n    if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n      options.volumeControl = options.volumeControl || {};\n      options.volumeControl.vertical = !options.inline;\n    }\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.on(player, ['loadstart'], _this.volumePanelState_);\n\n    // while the slider is active (the mouse has been pressed down and\n    // is dragging) we do not want to hide the VolumeBar\n    _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);\n\n    _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);\n    return _this;\n  }\n\n  /**\n   * Add vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#slideractive\n   * @private\n   */\n\n\n  VolumePanel.prototype.sliderActive_ = function sliderActive_() {\n    this.addClass('vjs-slider-active');\n  };\n\n  /**\n   * Removes vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#sliderinactive\n   * @private\n   */\n\n\n  VolumePanel.prototype.sliderInactive_ = function sliderInactive_() {\n    this.removeClass('vjs-slider-active');\n  };\n\n  /**\n   * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n   * depending on MuteToggle and VolumeControl state\n   *\n   * @listens Player#loadstart\n   * @private\n   */\n\n\n  VolumePanel.prototype.volumePanelState_ = function volumePanelState_() {\n    // hide volume panel if neither volume control or mute toggle\n    // are displayed\n    if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-hidden');\n    }\n\n    // if only mute toggle is visible we don't want\n    // volume panel expanding when hovered or active\n    if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-mute-toggle-only');\n    }\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  VolumePanel.prototype.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-panel-horizontal';\n\n    if (!this.options_.inline) {\n      orientationClass = 'vjs-volume-panel-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-panel vjs-control ' + orientationClass\n    });\n  };\n\n  return VolumePanel;\n}(Component);\n\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumePanel.prototype.options_ = {\n  children: ['muteToggle', 'volumeControl']\n};\n\nComponent.registerComponent('VolumePanel', VolumePanel);\n\n/**\n * @file menu.js\n */\n/**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n\nvar Menu = function (_Component) {\n  inherits(Menu, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        the player that this component should attach to\n   *\n   * @param {Object} [options]\n   *        Object of option names and values\n   *\n   */\n  function Menu(player, options) {\n    classCallCheck(this, Menu);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    if (options) {\n      _this.menuButton_ = options.menuButton;\n    }\n\n    _this.focusedChild_ = -1;\n\n    _this.on('keydown', _this.handleKeyPress);\n    return _this;\n  }\n\n  /**\n   * Add a {@link MenuItem} to the menu.\n   *\n   * @param {Object|string} component\n   *        The name or instance of the `MenuItem` to add.\n   *\n   */\n\n\n  Menu.prototype.addItem = function addItem(component) {\n    this.addChild(component);\n    component.on('click', bind(this, function (event) {\n      // Unpress the associated MenuButton, and move focus back to it\n      if (this.menuButton_) {\n        this.menuButton_.unpressButton();\n\n        // don't focus menu button if item is a caption settings item\n        // because focus will move elsewhere and it logs an error on IE8\n        if (component.name() !== 'CaptionSettingsMenuItem') {\n          this.menuButton_.focus();\n        }\n      }\n    }));\n  };\n\n  /**\n   * Create the `Menu`s DOM element.\n   *\n   * @return {Element}\n   *         the element that was created\n   */\n\n\n  Menu.prototype.createEl = function createEl$$1() {\n    var contentElType = this.options_.contentElType || 'ul';\n\n    this.contentEl_ = createEl(contentElType, {\n      className: 'vjs-menu-content'\n    });\n\n    this.contentEl_.setAttribute('role', 'menu');\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      append: this.contentEl_,\n      className: 'vjs-menu'\n    });\n\n    el.appendChild(this.contentEl_);\n\n    // Prevent clicks from bubbling up. Needed for Menu Buttons,\n    // where a click on the parent is significant\n    on(el, 'click', function (event) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    });\n\n    return el;\n  };\n\n  Menu.prototype.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Handle a `keydown` event on this menu. This listener is added in the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        A `keydown` event that happened on the menu.\n   *\n   * @listens keydown\n   */\n\n\n  Menu.prototype.handleKeyPress = function handleKeyPress(event) {\n    // Left and Down Arrows\n    if (event.which === 37 || event.which === 40) {\n      event.preventDefault();\n      this.stepForward();\n\n      // Up and Right Arrows\n    } else if (event.which === 38 || event.which === 39) {\n      event.preventDefault();\n      this.stepBack();\n    }\n  };\n\n  /**\n   * Move to next (lower) menu item for keyboard users.\n   */\n\n\n  Menu.prototype.stepForward = function stepForward() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ + 1;\n    }\n    this.focus(stepChild);\n  };\n\n  /**\n   * Move to previous (higher) menu item for keyboard users.\n   */\n\n\n  Menu.prototype.stepBack = function stepBack() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ - 1;\n    }\n    this.focus(stepChild);\n  };\n\n  /**\n   * Set focus on a {@link MenuItem} in the `Menu`.\n   *\n   * @param {Object|string} [item=0]\n   *        Index of child item set focus on.\n   */\n\n\n  Menu.prototype.focus = function focus() {\n    var item = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;\n\n    var children = this.children().slice();\n    var haveTitle = children.length && children[0].className && /vjs-menu-title/.test(children[0].className);\n\n    if (haveTitle) {\n      children.shift();\n    }\n\n    if (children.length > 0) {\n      if (item < 0) {\n        item = 0;\n      } else if (item >= children.length) {\n        item = children.length - 1;\n      }\n\n      this.focusedChild_ = item;\n\n      children[item].el_.focus();\n    }\n  };\n\n  return Menu;\n}(Component);\n\nComponent.registerComponent('Menu', Menu);\n\n/**\n * @file menu-button.js\n */\n/**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n\nvar MenuButton = function (_Component) {\n  inherits(MenuButton, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function MenuButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, MenuButton);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options));\n\n    _this.menuButton_ = new Button(player, options);\n\n    _this.menuButton_.controlText(_this.controlText_);\n    _this.menuButton_.el_.setAttribute('aria-haspopup', 'true');\n\n    // Add buildCSSClass values to the button, not the wrapper\n    var buttonClass = Button.prototype.buildCSSClass();\n\n    _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;\n    _this.menuButton_.removeClass('vjs-control');\n\n    _this.addChild(_this.menuButton_);\n\n    _this.update();\n\n    _this.enabled_ = true;\n\n    _this.on(_this.menuButton_, 'tap', _this.handleClick);\n    _this.on(_this.menuButton_, 'click', _this.handleClick);\n    _this.on(_this.menuButton_, 'focus', _this.handleFocus);\n    _this.on(_this.menuButton_, 'blur', _this.handleBlur);\n\n    _this.on('keydown', _this.handleSubmenuKeyPress);\n    return _this;\n  }\n\n  /**\n   * Update the menu based on the current state of its items.\n   */\n\n\n  MenuButton.prototype.update = function update() {\n    var menu = this.createMenu();\n\n    if (this.menu) {\n      this.menu.dispose();\n      this.removeChild(this.menu);\n    }\n\n    this.menu = menu;\n    this.addChild(menu);\n\n    /**\n     * Track the state of the menu button\n     *\n     * @type {Boolean}\n     * @private\n     */\n    this.buttonPressed_ = false;\n    this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n\n    if (this.items && this.items.length <= this.hideThreshold_) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  };\n\n  /**\n   * Create the menu and add all items to it.\n   *\n   * @return {Menu}\n   *         The constructed menu\n   */\n\n\n  MenuButton.prototype.createMenu = function createMenu() {\n    var menu = new Menu(this.player_, { menuButton: this });\n\n    /**\n     * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n     * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n     * it here because every time we run `createMenu` we need to reset the value.\n     *\n     * @protected\n     * @type {Number}\n     */\n    this.hideThreshold_ = 0;\n\n    // Add a title list item to the top\n    if (this.options_.title) {\n      var title = createEl('li', {\n        className: 'vjs-menu-title',\n        innerHTML: toTitleCase(this.options_.title),\n        tabIndex: -1\n      });\n\n      this.hideThreshold_ += 1;\n\n      menu.children_.unshift(title);\n      prependTo(title, menu.contentEl());\n    }\n\n    this.items = this.createItems();\n\n    if (this.items) {\n      // Add menu items to the menu\n      for (var i = 0; i < this.items.length; i++) {\n        menu.addItem(this.items[i]);\n      }\n    }\n\n    return menu;\n  };\n\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   * @abstract\n   */\n\n\n  MenuButton.prototype.createItems = function createItems() {};\n\n  /**\n   * Create the `MenuButtons`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  MenuButton.prototype.createEl = function createEl$$1() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildWrapperCSSClass()\n    }, {});\n  };\n\n  /**\n   * Allow sub components to stack CSS class names for the wrapper element\n   *\n   * @return {string}\n   *         The constructed wrapper DOM `className`\n   */\n\n\n  MenuButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    var menuButtonClass = 'vjs-menu-button';\n\n    // If the inline option is passed, we want to use different styles altogether.\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    // TODO: Fix the CSS so that this isn't necessary\n    var buttonClass = Button.prototype.buildCSSClass();\n\n    return 'vjs-menu-button ' + menuButtonClass + ' ' + buttonClass + ' ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  MenuButton.prototype.buildCSSClass = function buildCSSClass() {\n    var menuButtonClass = 'vjs-menu-button';\n\n    // If the inline option is passed, we want to use different styles altogether.\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    return 'vjs-menu-button ' + menuButtonClass + ' ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Get or set the localized control text that will be used for accessibility.\n   *\n   * > NOTE: This will come from the internal `menuButton_` element.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.menuButton_.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n\n\n  MenuButton.prototype.controlText = function controlText(text) {\n    var el = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.menuButton_.el();\n\n    return this.menuButton_.controlText(text, el);\n  };\n\n  /**\n   * Handle a click on a `MenuButton`.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  MenuButton.prototype.handleClick = function handleClick(event) {\n    // When you click the button it adds focus, which will show the menu.\n    // So we'll remove focus when the mouse leaves the button. Focus is needed\n    // for tab navigation.\n\n    this.one(this.menu.contentEl(), 'mouseleave', bind(this, function (e) {\n      this.unpressButton();\n      this.el_.blur();\n    }));\n    if (this.buttonPressed_) {\n      this.unpressButton();\n    } else {\n      this.pressButton();\n    }\n  };\n\n  /**\n   * Set the focus to the actual button, not to this element\n   */\n\n\n  MenuButton.prototype.focus = function focus() {\n    this.menuButton_.focus();\n  };\n\n  /**\n   * Remove the focus from the actual button, not this element\n   */\n\n\n  MenuButton.prototype.blur = function blur() {\n    this.menuButton_.blur();\n  };\n\n  /**\n   * This gets called when a `MenuButton` gains focus via a `focus` event.\n   * Turns on listening for `keydown` events. When they happen it\n   * calls `this.handleKeyPress`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `focus` event that caused this function to be called.\n   *\n   * @listens focus\n   */\n\n\n  MenuButton.prototype.handleFocus = function handleFocus() {\n    on(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  /**\n   * Called when a `MenuButton` loses focus. Turns off the listener for\n   * `keydown` events. Which Stops `this.handleKeyPress` from getting called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n\n\n  MenuButton.prototype.handleBlur = function handleBlur() {\n    off(document, 'keydown', bind(this, this.handleKeyPress));\n  };\n\n  /**\n   * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n   * {@link ClickableComponent#handleKeyPress} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n\n\n  MenuButton.prototype.handleKeyPress = function handleKeyPress(event) {\n\n    // Escape (27) key or Tab (9) key unpress the 'button'\n    if (event.which === 27 || event.which === 9) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      }\n      // Don't preventDefault for Tab key - we still want to lose focus\n      if (event.which !== 9) {\n        event.preventDefault();\n        // Set focus back to the menu button's button\n        this.menuButton_.el_.focus();\n      }\n      // Up (38) key or Down (40) key press the 'button'\n    } else if (event.which === 38 || event.which === 40) {\n      if (!this.buttonPressed_) {\n        this.pressButton();\n        event.preventDefault();\n      }\n    }\n  };\n\n  /**\n   * Handle a `keydown` event on a sub-menu. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keydown\n   */\n\n\n  MenuButton.prototype.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {\n\n    // Escape (27) key or Tab (9) key unpress the 'button'\n    if (event.which === 27 || event.which === 9) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      }\n      // Don't preventDefault for Tab key - we still want to lose focus\n      if (event.which !== 9) {\n        event.preventDefault();\n        // Set focus back to the menu button's button\n        this.menuButton_.el_.focus();\n      }\n    }\n  };\n\n  /**\n   * Put the current `MenuButton` into a pressed state.\n   */\n\n\n  MenuButton.prototype.pressButton = function pressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = true;\n      this.menu.lockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'true');\n\n      // set the focus into the submenu, except on iOS where it is resulting in\n      // undesired scrolling behavior when the player is in an iframe\n      if (IS_IOS && isInFrame()) {\n        // Return early so that the menu isn't focused\n        return;\n      }\n\n      this.menu.focus();\n    }\n  };\n\n  /**\n   * Take the current `MenuButton` out of a pressed state.\n   */\n\n\n  MenuButton.prototype.unpressButton = function unpressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = false;\n      this.menu.unlockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n    }\n  };\n\n  /**\n   * Disable the `MenuButton`. Don't allow it to be clicked.\n   */\n\n\n  MenuButton.prototype.disable = function disable() {\n    this.unpressButton();\n\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n\n    this.menuButton_.disable();\n  };\n\n  /**\n   * Enable the `MenuButton`. Allow it to be clicked.\n   */\n\n\n  MenuButton.prototype.enable = function enable() {\n    this.enabled_ = true;\n    this.removeClass('vjs-disabled');\n\n    this.menuButton_.enable();\n  };\n\n  return MenuButton;\n}(Component);\n\nComponent.registerComponent('MenuButton', MenuButton);\n\n/**\n * @file track-button.js\n */\n/**\n * The base class for buttons that toggle specific  track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n\nvar TrackButton = function (_MenuButton) {\n  inherits(TrackButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TrackButton(player, options) {\n    classCallCheck(this, TrackButton);\n\n    var tracks = options.tracks;\n\n    var _this = possibleConstructorReturn(this, _MenuButton.call(this, player, options));\n\n    if (_this.items.length <= 1) {\n      _this.hide();\n    }\n\n    if (!tracks) {\n      return possibleConstructorReturn(_this);\n    }\n\n    var updateHandler = bind(_this, _this.update);\n\n    tracks.addEventListener('removetrack', updateHandler);\n    tracks.addEventListener('addtrack', updateHandler);\n    _this.player_.on('ready', updateHandler);\n\n    _this.player_.on('dispose', function () {\n      tracks.removeEventListener('removetrack', updateHandler);\n      tracks.removeEventListener('addtrack', updateHandler);\n    });\n    return _this;\n  }\n\n  return TrackButton;\n}(MenuButton);\n\nComponent.registerComponent('TrackButton', TrackButton);\n\n/**\n * @file menu-item.js\n */\n/**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n\nvar MenuItem = function (_ClickableComponent) {\n  inherits(MenuItem, _ClickableComponent);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   *\n   */\n  function MenuItem(player, options) {\n    classCallCheck(this, MenuItem);\n\n    var _this = possibleConstructorReturn(this, _ClickableComponent.call(this, player, options));\n\n    _this.selectable = options.selectable;\n    _this.isSelected_ = options.selected || false;\n    _this.multiSelectable = options.multiSelectable;\n\n    _this.selected(_this.isSelected_);\n\n    if (_this.selectable) {\n      if (_this.multiSelectable) {\n        _this.el_.setAttribute('role', 'menuitemcheckbox');\n      } else {\n        _this.el_.setAttribute('role', 'menuitemradio');\n      }\n    } else {\n      _this.el_.setAttribute('role', 'menuitem');\n    }\n    return _this;\n  }\n\n  /**\n   * Create the `MenuItem's DOM element\n   *\n   * @param {string} [type=li]\n   *        Element's node type, not actually used, always set to `li`.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element\n   *\n   * @param {Object} [attrs={}]\n   *        An object of attributes that should be set on the element\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  MenuItem.prototype.createEl = function createEl(type, props, attrs) {\n    // The control is textual, not just an icon\n    this.nonIconControl = true;\n\n    return _ClickableComponent.prototype.createEl.call(this, 'li', assign({\n      className: 'vjs-menu-item',\n      innerHTML: '<span class=\"vjs-menu-item-text\">' + this.localize(this.options_.label) + '</span>',\n      tabIndex: -1\n    }, props), attrs);\n  };\n\n  /**\n   * Any click on a `MenuItem` puts it into the selected state.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  MenuItem.prototype.handleClick = function handleClick(event) {\n    this.selected(true);\n  };\n\n  /**\n   * Set the state for this menu item as selected or not.\n   *\n   * @param {boolean} selected\n   *        if the menu item is selected or not\n   */\n\n\n  MenuItem.prototype.selected = function selected(_selected) {\n    if (this.selectable) {\n      if (_selected) {\n        this.addClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'true');\n        // aria-checked isn't fully supported by browsers/screen readers,\n        // so indicate selected state to screen reader in the control text.\n        this.controlText(', selected');\n        this.isSelected_ = true;\n      } else {\n        this.removeClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'false');\n        // Indicate un-selected state to screen reader\n        this.controlText('');\n        this.isSelected_ = false;\n      }\n    }\n  };\n\n  return MenuItem;\n}(ClickableComponent);\n\nComponent.registerComponent('MenuItem', MenuItem);\n\n/**\n * @file text-track-menu-item.js\n */\n/**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n\nvar TextTrackMenuItem = function (_MenuItem) {\n  inherits(TextTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TextTrackMenuItem(player, options) {\n    classCallCheck(this, TextTrackMenuItem);\n\n    var track = options.track;\n    var tracks = player.textTracks();\n\n    // Modify options for parent MenuItem class's init.\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.mode === 'showing';\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.track = track;\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_this, args);\n    };\n    var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {\n      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      _this.handleSelectedLanguageChange.apply(_this, args);\n    };\n\n    player.on(['loadstart', 'texttrackchange'], changeHandler);\n    tracks.addEventListener('change', changeHandler);\n    tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    _this.on('dispose', function () {\n      player.off(['loadstart', 'texttrackchange'], changeHandler);\n      tracks.removeEventListener('change', changeHandler);\n      tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    });\n\n    // iOS7 doesn't dispatch change events to TextTrackLists when an\n    // associated track's mode changes. Without something like\n    // Object.observe() (also not present on iOS7), it's not\n    // possible to detect changes to the mode attribute and polyfill\n    // the change event. As a poor substitute, we manually dispatch\n    // change events whenever the controls modify the mode.\n    if (tracks.onchange === undefined) {\n      var event = void 0;\n\n      _this.on(['tap', 'click'], function () {\n        if (_typeof(window.Event) !== 'object') {\n          // Android 2.3 throws an Illegal Constructor error for window.Event\n          try {\n            event = new window.Event('change');\n          } catch (err) {\n            // continue regardless of error\n          }\n        }\n\n        if (!event) {\n          event = document.createEvent('Event');\n          event.initEvent('change', true, true);\n        }\n\n        tracks.dispatchEvent(event);\n      });\n    }\n\n    // set the default state based on current tracks\n    _this.handleTracksChange();\n    return _this;\n  }\n\n  /**\n   * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  TextTrackMenuItem.prototype.handleClick = function handleClick(event) {\n    var kind = this.track.kind;\n    var kinds = this.track.kinds;\n    var tracks = this.player_.textTracks();\n\n    if (!kinds) {\n      kinds = [kind];\n    }\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    if (!tracks) {\n      return;\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      if (track === this.track && kinds.indexOf(track.kind) > -1) {\n        if (track.mode !== 'showing') {\n          track.mode = 'showing';\n        }\n      } else if (track.mode !== 'disabled') {\n        track.mode = 'disabled';\n      }\n    }\n  };\n\n  /**\n   * Handle text track list change\n   *\n   * @param {EventTarget~Event} event\n   *        The `change` event that caused this function to be called.\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  TextTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {\n    var shouldBeSelected = this.track.mode === 'showing';\n\n    // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  TextTrackMenuItem.prototype.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    if (this.track.mode === 'showing') {\n      var selectedLanguage = this.player_.cache_.selectedLanguage;\n\n      // Don't replace the kind of track across the same language\n      if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n        return;\n      }\n\n      this.player_.cache_.selectedLanguage = {\n        enabled: true,\n        language: this.track.language,\n        kind: this.track.kind\n      };\n    }\n  };\n\n  TextTrackMenuItem.prototype.dispose = function dispose() {\n    // remove reference to track object on dispose\n    this.track = null;\n\n    _MenuItem.prototype.dispose.call(this);\n  };\n\n  return TextTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n\n/**\n * @file off-text-track-menu-item.js\n */\n/**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n\nvar OffTextTrackMenuItem = function (_TextTrackMenuItem) {\n  inherits(OffTextTrackMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function OffTextTrackMenuItem(player, options) {\n    classCallCheck(this, OffTextTrackMenuItem);\n\n    // Create pseudo track info\n    // Requires options['kind']\n    options.track = {\n      player: player,\n      kind: options.kind,\n      kinds: options.kinds,\n      'default': false,\n      mode: 'disabled'\n    };\n\n    if (!options.kinds) {\n      options.kinds = [options.kind];\n    }\n\n    if (options.label) {\n      options.track.label = options.label;\n    } else {\n      options.track.label = options.kinds.join(' and ') + ' off';\n    }\n\n    // MenuItem is selectable\n    options.selectable = true;\n    // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n    options.multiSelectable = false;\n\n    return possibleConstructorReturn(this, _TextTrackMenuItem.call(this, player, options));\n  }\n\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   */\n\n\n  OffTextTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var shouldBeSelected = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n        shouldBeSelected = false;\n        break;\n      }\n    }\n\n    // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  OffTextTrackMenuItem.prototype.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    var tracks = this.player().textTracks();\n    var allHidden = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n        allHidden = false;\n        break;\n      }\n    }\n\n    if (allHidden) {\n      this.player_.cache_.selectedLanguage = {\n        enabled: false\n      };\n    }\n  };\n\n  return OffTextTrackMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n\n/**\n * @file text-track-button.js\n */\n/**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n\nvar TextTrackButton = function (_TrackButton) {\n  inherits(TextTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function TextTrackButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, TextTrackButton);\n\n    options.tracks = player.textTracks();\n\n    return possibleConstructorReturn(this, _TrackButton.call(this, player, options));\n  }\n\n  /**\n   * Create a menu item for each text track\n   *\n   * @param {TextTrackMenuItem[]} [items=[]]\n   *        Existing array of items to use during creation\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items that were created\n   */\n\n\n  TextTrackButton.prototype.createItems = function createItems() {\n    var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n    var TrackMenuItem = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : TextTrackMenuItem;\n\n\n    // Label is an overide for the [track] off label\n    // USed to localise captions/subtitles\n    var label = void 0;\n\n    if (this.label_) {\n      label = this.label_ + ' off';\n    }\n    // Add an OFF menu item to turn all tracks off\n    items.push(new OffTextTrackMenuItem(this.player_, {\n      kinds: this.kinds_,\n      kind: this.kind_,\n      label: label\n    }));\n\n    this.hideThreshold_ += 1;\n\n    var tracks = this.player_.textTracks();\n\n    if (!Array.isArray(this.kinds_)) {\n      this.kinds_ = [this.kind_];\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      // only add tracks that are of an appropriate kind and have a label\n      if (this.kinds_.indexOf(track.kind) > -1) {\n\n        var item = new TrackMenuItem(this.player_, {\n          track: track,\n          // MenuItem is selectable\n          selectable: true,\n          // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n          multiSelectable: false\n        });\n\n        item.addClass('vjs-' + track.kind + '-menu-item');\n        items.push(item);\n      }\n    }\n\n    return items;\n  };\n\n  return TextTrackButton;\n}(TrackButton);\n\nComponent.registerComponent('TextTrackButton', TextTrackButton);\n\n/**\n * @file chapters-track-menu-item.js\n */\n/**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n\nvar ChaptersTrackMenuItem = function (_MenuItem) {\n  inherits(ChaptersTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ChaptersTrackMenuItem(player, options) {\n    classCallCheck(this, ChaptersTrackMenuItem);\n\n    var track = options.track;\n    var cue = options.cue;\n    var currentTime = player.currentTime();\n\n    // Modify options for parent MenuItem class's init.\n    options.selectable = true;\n    options.multiSelectable = false;\n    options.label = cue.text;\n    options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.track = track;\n    _this.cue = cue;\n    track.addEventListener('cuechange', bind(_this, _this.update));\n    return _this;\n  }\n\n  /**\n   * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  ChaptersTrackMenuItem.prototype.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n    this.player_.currentTime(this.cue.startTime);\n    this.update(this.cue.startTime);\n  };\n\n  /**\n   * Update chapter menu item\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `cuechange` event that caused this function to run.\n   *\n   * @listens TextTrack#cuechange\n   */\n\n\n  ChaptersTrackMenuItem.prototype.update = function update(event) {\n    var cue = this.cue;\n    var currentTime = this.player_.currentTime();\n\n    // vjs.log(currentTime, cue.startTime);\n    this.selected(cue.startTime <= currentTime && currentTime < cue.endTime);\n  };\n\n  return ChaptersTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n\n/**\n * @file chapters-button.js\n */\n/**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n\nvar ChaptersButton = function (_TextTrackButton) {\n  inherits(ChaptersButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this function is ready.\n   */\n  function ChaptersButton(player, options, ready) {\n    classCallCheck(this, ChaptersButton);\n    return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  ChaptersButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-chapters-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  ChaptersButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-chapters-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Update the menu based on the current state of its items.\n   *\n   * @param {EventTarget~Event} [event]\n   *        An event that triggered this function to run.\n   *\n   * @listens TextTrackList#addtrack\n   * @listens TextTrackList#removetrack\n   * @listens TextTrackList#change\n   */\n\n\n  ChaptersButton.prototype.update = function update(event) {\n    if (!this.track_ || event && (event.type === 'addtrack' || event.type === 'removetrack')) {\n      this.setTrack(this.findChaptersTrack());\n    }\n    _TextTrackButton.prototype.update.call(this);\n  };\n\n  /**\n   * Set the currently selected track for the chapters button.\n   *\n   * @param {TextTrack} track\n   *        The new track to select. Nothing will change if this is the currently selected\n   *        track.\n   */\n\n\n  ChaptersButton.prototype.setTrack = function setTrack(track) {\n    if (this.track_ === track) {\n      return;\n    }\n\n    if (!this.updateHandler_) {\n      this.updateHandler_ = this.update.bind(this);\n    }\n\n    // here this.track_ refers to the old track instance\n    if (this.track_) {\n      var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (remoteTextTrackEl) {\n        remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n      }\n\n      this.track_ = null;\n    }\n\n    this.track_ = track;\n\n    // here this.track_ refers to the new track instance\n    if (this.track_) {\n      this.track_.mode = 'hidden';\n\n      var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (_remoteTextTrackEl) {\n        _remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n      }\n    }\n  };\n\n  /**\n   * Find the track object that is currently in use by this ChaptersButton\n   *\n   * @return {TextTrack|undefined}\n   *         The current track or undefined if none was found.\n   */\n\n\n  ChaptersButton.prototype.findChaptersTrack = function findChaptersTrack() {\n    var tracks = this.player_.textTracks() || [];\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      // We will always choose the last track as our chaptersTrack\n      var track = tracks[i];\n\n      if (track.kind === this.kind_) {\n        return track;\n      }\n    }\n  };\n\n  /**\n   * Get the caption for the ChaptersButton based on the track label. This will also\n   * use the current tracks localized kind as a fallback if a label does not exist.\n   *\n   * @return {string}\n   *         The tracks current label or the localized track kind.\n   */\n\n\n  ChaptersButton.prototype.getMenuCaption = function getMenuCaption() {\n    if (this.track_ && this.track_.label) {\n      return this.track_.label;\n    }\n    return this.localize(toTitleCase(this.kind_));\n  };\n\n  /**\n   * Create menu from chapter track\n   *\n   * @return {Menu}\n   *         New menu for the chapter buttons\n   */\n\n\n  ChaptersButton.prototype.createMenu = function createMenu() {\n    this.options_.title = this.getMenuCaption();\n    return _TextTrackButton.prototype.createMenu.call(this);\n  };\n\n  /**\n   * Create a menu item for each text track\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items\n   */\n\n\n  ChaptersButton.prototype.createItems = function createItems() {\n    var items = [];\n\n    if (!this.track_) {\n      return items;\n    }\n\n    var cues = this.track_.cues;\n\n    if (!cues) {\n      return items;\n    }\n\n    for (var i = 0, l = cues.length; i < l; i++) {\n      var cue = cues[i];\n      var mi = new ChaptersTrackMenuItem(this.player_, { track: this.track_, cue: cue });\n\n      items.push(mi);\n    }\n\n    return items;\n  };\n\n  return ChaptersButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nChaptersButton.prototype.kind_ = 'chapters';\n\n/**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nChaptersButton.prototype.controlText_ = 'Chapters';\n\nComponent.registerComponent('ChaptersButton', ChaptersButton);\n\n/**\n * @file descriptions-button.js\n */\n/**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n\nvar DescriptionsButton = function (_TextTrackButton) {\n  inherits(DescriptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function DescriptionsButton(player, options, ready) {\n    classCallCheck(this, DescriptionsButton);\n\n    var _this = possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n\n    var tracks = player.textTracks();\n    var changeHandler = bind(_this, _this.handleTracksChange);\n\n    tracks.addEventListener('change', changeHandler);\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n    return _this;\n  }\n\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  DescriptionsButton.prototype.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var disabled = false;\n\n    // Check whether a track of a different kind is showing\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (track.kind !== this.kind_ && track.mode === 'showing') {\n        disabled = true;\n        break;\n      }\n    }\n\n    // If another track is showing, disable this menu button\n    if (disabled) {\n      this.disable();\n    } else {\n      this.enable();\n    }\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  DescriptionsButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  DescriptionsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-descriptions-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return DescriptionsButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nDescriptionsButton.prototype.kind_ = 'descriptions';\n\n/**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nDescriptionsButton.prototype.controlText_ = 'Descriptions';\n\nComponent.registerComponent('DescriptionsButton', DescriptionsButton);\n\n/**\n * @file subtitles-button.js\n */\n/**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubtitlesButton = function (_TextTrackButton) {\n  inherits(SubtitlesButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function SubtitlesButton(player, options, ready) {\n    classCallCheck(this, SubtitlesButton);\n    return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  SubtitlesButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-subtitles-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  SubtitlesButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-subtitles-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return SubtitlesButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nSubtitlesButton.prototype.kind_ = 'subtitles';\n\n/**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nSubtitlesButton.prototype.controlText_ = 'Subtitles';\n\nComponent.registerComponent('SubtitlesButton', SubtitlesButton);\n\n/**\n * @file caption-settings-menu-item.js\n */\n/**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n\nvar CaptionSettingsMenuItem = function (_TextTrackMenuItem) {\n  inherits(CaptionSettingsMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CaptionSettingsMenuItem(player, options) {\n    classCallCheck(this, CaptionSettingsMenuItem);\n\n    options.track = {\n      player: player,\n      kind: options.kind,\n      label: options.kind + ' settings',\n      selectable: false,\n      'default': false,\n      mode: 'disabled'\n    };\n\n    // CaptionSettingsMenuItem has no concept of 'selected'\n    options.selectable = false;\n\n    options.name = 'CaptionSettingsMenuItem';\n\n    var _this = possibleConstructorReturn(this, _TextTrackMenuItem.call(this, player, options));\n\n    _this.addClass('vjs-texttrack-settings');\n    _this.controlText(', opens ' + options.kind + ' settings dialog');\n    return _this;\n  }\n\n  /**\n   * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  CaptionSettingsMenuItem.prototype.handleClick = function handleClick(event) {\n    this.player().getChild('textTrackSettings').open();\n  };\n\n  return CaptionSettingsMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n\n/**\n * @file captions-button.js\n */\n/**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n\nvar CaptionsButton = function (_TextTrackButton) {\n  inherits(CaptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function CaptionsButton(player, options, ready) {\n    classCallCheck(this, CaptionsButton);\n    return possibleConstructorReturn(this, _TextTrackButton.call(this, player, options, ready));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  CaptionsButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-captions-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  CaptionsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-captions-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create caption menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n\n\n  CaptionsButton.prototype.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, { kind: this.kind_ }));\n\n      this.hideThreshold_ += 1;\n    }\n\n    return _TextTrackButton.prototype.createItems.call(this, items);\n  };\n\n  return CaptionsButton;\n}(TextTrackButton);\n\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nCaptionsButton.prototype.kind_ = 'captions';\n\n/**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\nCaptionsButton.prototype.controlText_ = 'Captions';\n\nComponent.registerComponent('CaptionsButton', CaptionsButton);\n\n/**\n * @file subs-caps-menu-item.js\n */\n/**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n\nvar SubsCapsMenuItem = function (_TextTrackMenuItem) {\n  inherits(SubsCapsMenuItem, _TextTrackMenuItem);\n\n  function SubsCapsMenuItem() {\n    classCallCheck(this, SubsCapsMenuItem);\n    return possibleConstructorReturn(this, _TextTrackMenuItem.apply(this, arguments));\n  }\n\n  SubsCapsMenuItem.prototype.createEl = function createEl(type, props, attrs) {\n    var innerHTML = '<span class=\"vjs-menu-item-text\">' + this.localize(this.options_.label);\n\n    if (this.options_.track.kind === 'captions') {\n      innerHTML += '\\n        <span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>\\n        <span class=\"vjs-control-text\"> ' + this.localize('Captions') + '</span>\\n      ';\n    }\n\n    innerHTML += '</span>';\n\n    var el = _TextTrackMenuItem.prototype.createEl.call(this, type, assign({\n      innerHTML: innerHTML\n    }, props), attrs);\n\n    return el;\n  };\n\n  return SubsCapsMenuItem;\n}(TextTrackMenuItem);\n\nComponent.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n\n/**\n * @file sub-caps-button.js\n */\n/**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubsCapsButton = function (_TextTrackButton) {\n  inherits(SubsCapsButton, _TextTrackButton);\n\n  function SubsCapsButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, SubsCapsButton);\n\n    // Although North America uses \"captions\" in most cases for\n    // \"captions and subtitles\" other locales use \"subtitles\"\n    var _this = possibleConstructorReturn(this, _TextTrackButton.call(this, player, options));\n\n    _this.label_ = 'subtitles';\n    if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {\n      _this.label_ = 'captions';\n    }\n    _this.menuButton_.controlText(toTitleCase(_this.label_));\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  SubsCapsButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-subs-caps-button ' + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  SubsCapsButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-subs-caps-button ' + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create caption/subtitles menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n\n\n  SubsCapsButton.prototype.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, { kind: this.label_ }));\n\n      this.hideThreshold_ += 1;\n    }\n\n    items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);\n    return items;\n  };\n\n  return SubsCapsButton;\n}(TextTrackButton);\n\n/**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n\n\nSubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n\n/**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @private\n */\nSubsCapsButton.prototype.controlText_ = 'Subtitles';\n\nComponent.registerComponent('SubsCapsButton', SubsCapsButton);\n\n/**\n * @file audio-track-menu-item.js\n */\n/**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n\nvar AudioTrackMenuItem = function (_MenuItem) {\n  inherits(AudioTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function AudioTrackMenuItem(player, options) {\n    classCallCheck(this, AudioTrackMenuItem);\n\n    var track = options.track;\n    var tracks = player.audioTracks();\n\n    // Modify options for parent MenuItem class's init.\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.enabled;\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.track = track;\n\n    _this.addClass('vjs-' + track.kind + '-menu-item');\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_this, args);\n    };\n\n    tracks.addEventListener('change', changeHandler);\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n    return _this;\n  }\n\n  AudioTrackMenuItem.prototype.createEl = function createEl(type, props, attrs) {\n    var innerHTML = '<span class=\"vjs-menu-item-text\">' + this.localize(this.options_.label);\n\n    if (this.options_.track.kind === 'main-desc') {\n      innerHTML += '\\n        <span aria-hidden=\"true\" class=\"vjs-icon-placeholder\"></span>\\n        <span class=\"vjs-control-text\"> ' + this.localize('Descriptions') + '</span>\\n      ';\n    }\n\n    innerHTML += '</span>';\n\n    var el = _MenuItem.prototype.createEl.call(this, type, assign({\n      innerHTML: innerHTML\n    }, props), attrs);\n\n    return el;\n  };\n\n  /**\n   * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  AudioTrackMenuItem.prototype.handleClick = function handleClick(event) {\n    var tracks = this.player_.audioTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      track.enabled = track === this.track;\n    }\n  };\n\n  /**\n   * Handle any {@link AudioTrack} change.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link AudioTrackList#change} event that caused this to run.\n   *\n   * @listens AudioTrackList#change\n   */\n\n\n  AudioTrackMenuItem.prototype.handleTracksChange = function handleTracksChange(event) {\n    this.selected(this.track.enabled);\n  };\n\n  return AudioTrackMenuItem;\n}(MenuItem);\n\nComponent.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n\n/**\n * @file audio-track-button.js\n */\n/**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n\nvar AudioTrackButton = function (_TrackButton) {\n  inherits(AudioTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function AudioTrackButton(player) {\n    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    classCallCheck(this, AudioTrackButton);\n\n    options.tracks = player.audioTracks();\n\n    return possibleConstructorReturn(this, _TrackButton.call(this, player, options));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  AudioTrackButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-audio-button ' + _TrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  AudioTrackButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-audio-button ' + _TrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create a menu item for each audio track\n   *\n   * @param {AudioTrackMenuItem[]} [items=[]]\n   *        An array of existing menu items to use.\n   *\n   * @return {AudioTrackMenuItem[]}\n   *         An array of menu items\n   */\n\n\n  AudioTrackButton.prototype.createItems = function createItems() {\n    var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];\n\n    // if there's only one audio track, there no point in showing it\n    this.hideThreshold_ = 1;\n\n    var tracks = this.player_.audioTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      items.push(new AudioTrackMenuItem(this.player_, {\n        track: track,\n        // MenuItem is selectable\n        selectable: true,\n        // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n        multiSelectable: false\n      }));\n    }\n\n    return items;\n  };\n\n  return AudioTrackButton;\n}(TrackButton);\n\n/**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nAudioTrackButton.prototype.controlText_ = 'Audio Track';\nComponent.registerComponent('AudioTrackButton', AudioTrackButton);\n\n/**\n * @file playback-rate-menu-item.js\n */\n/**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n\nvar PlaybackRateMenuItem = function (_MenuItem) {\n  inherits(PlaybackRateMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuItem(player, options) {\n    classCallCheck(this, PlaybackRateMenuItem);\n\n    var label = options.rate;\n    var rate = parseFloat(label, 10);\n\n    // Modify options for parent MenuItem class's init.\n    options.label = label;\n    options.selected = rate === 1;\n    options.selectable = true;\n    options.multiSelectable = false;\n\n    var _this = possibleConstructorReturn(this, _MenuItem.call(this, player, options));\n\n    _this.label = label;\n    _this.rate = rate;\n\n    _this.on(player, 'ratechange', _this.update);\n    return _this;\n  }\n\n  /**\n   * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  PlaybackRateMenuItem.prototype.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n    this.player().playbackRate(this.rate);\n  };\n\n  /**\n   * Update the PlaybackRateMenuItem when the playbackrate changes.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ratechange` event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n\n\n  PlaybackRateMenuItem.prototype.update = function update(event) {\n    this.selected(this.player().playbackRate() === this.rate);\n  };\n\n  return PlaybackRateMenuItem;\n}(MenuItem);\n\n/**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuItem.prototype.contentElType = 'button';\n\nComponent.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n\n/**\n * @file playback-rate-menu-button.js\n */\n/**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n\nvar PlaybackRateMenuButton = function (_MenuButton) {\n  inherits(PlaybackRateMenuButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuButton(player, options) {\n    classCallCheck(this, PlaybackRateMenuButton);\n\n    var _this = possibleConstructorReturn(this, _MenuButton.call(this, player, options));\n\n    _this.updateVisibility();\n    _this.updateLabel();\n\n    _this.on(player, 'loadstart', _this.updateVisibility);\n    _this.on(player, 'ratechange', _this.updateLabel);\n    return _this;\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  PlaybackRateMenuButton.prototype.createEl = function createEl$$1() {\n    var el = _MenuButton.prototype.createEl.call(this);\n\n    this.labelEl_ = createEl('div', {\n      className: 'vjs-playback-rate-value',\n      innerHTML: '1x'\n    });\n\n    el.appendChild(this.labelEl_);\n\n    return el;\n  };\n\n  PlaybackRateMenuButton.prototype.dispose = function dispose() {\n    this.labelEl_ = null;\n\n    _MenuButton.prototype.dispose.call(this);\n  };\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  PlaybackRateMenuButton.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-playback-rate ' + _MenuButton.prototype.buildCSSClass.call(this);\n  };\n\n  PlaybackRateMenuButton.prototype.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return 'vjs-playback-rate ' + _MenuButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  /**\n   * Create the playback rate menu\n   *\n   * @return {Menu}\n   *         Menu object populated with {@link PlaybackRateMenuItem}s\n   */\n\n\n  PlaybackRateMenuButton.prototype.createMenu = function createMenu() {\n    var menu = new Menu(this.player());\n    var rates = this.playbackRates();\n\n    if (rates) {\n      for (var i = rates.length - 1; i >= 0; i--) {\n        menu.addChild(new PlaybackRateMenuItem(this.player(), { rate: rates[i] + 'x' }));\n      }\n    }\n\n    return menu;\n  };\n\n  /**\n   * Updates ARIA accessibility attributes\n   */\n\n\n  PlaybackRateMenuButton.prototype.updateARIAAttributes = function updateARIAAttributes() {\n    // Current playback rate\n    this.el().setAttribute('aria-valuenow', this.player().playbackRate());\n  };\n\n  /**\n   * This gets called when an `PlaybackRateMenuButton` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  PlaybackRateMenuButton.prototype.handleClick = function handleClick(event) {\n    // select next rate option\n    var currentRate = this.player().playbackRate();\n    var rates = this.playbackRates();\n\n    // this will select first one if the last one currently selected\n    var newRate = rates[0];\n\n    for (var i = 0; i < rates.length; i++) {\n      if (rates[i] > currentRate) {\n        newRate = rates[i];\n        break;\n      }\n    }\n    this.player().playbackRate(newRate);\n  };\n\n  /**\n   * Get possible playback rates\n   *\n   * @return {Array}\n   *         All possible playback rates\n   */\n\n\n  PlaybackRateMenuButton.prototype.playbackRates = function playbackRates() {\n    return this.options_.playbackRates || this.options_.playerOptions && this.options_.playerOptions.playbackRates;\n  };\n\n  /**\n   * Get whether playback rates is supported by the tech\n   * and an array of playback rates exists\n   *\n   * @return {boolean}\n   *         Whether changing playback rate is supported\n   */\n\n\n  PlaybackRateMenuButton.prototype.playbackRateSupported = function playbackRateSupported() {\n    return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n  };\n\n  /**\n   * Hide playback rate controls when they're no playback rate options to select\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#loadstart\n   */\n\n\n  PlaybackRateMenuButton.prototype.updateVisibility = function updateVisibility(event) {\n    if (this.playbackRateSupported()) {\n      this.removeClass('vjs-hidden');\n    } else {\n      this.addClass('vjs-hidden');\n    }\n  };\n\n  /**\n   * Update button label when rate changed\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n\n\n  PlaybackRateMenuButton.prototype.updateLabel = function updateLabel(event) {\n    if (this.playbackRateSupported()) {\n      this.labelEl_.innerHTML = this.player().playbackRate() + 'x';\n    }\n  };\n\n  return PlaybackRateMenuButton;\n}(MenuButton);\n\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\n\nComponent.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n\n/**\n * @file spacer.js\n */\n/**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n\nvar Spacer = function (_Component) {\n  inherits(Spacer, _Component);\n\n  function Spacer() {\n    classCallCheck(this, Spacer);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  Spacer.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-spacer ' + _Component.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  Spacer.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass()\n    });\n  };\n\n  return Spacer;\n}(Component);\n\nComponent.registerComponent('Spacer', Spacer);\n\n/**\n * @file custom-control-spacer.js\n */\n/**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n\nvar CustomControlSpacer = function (_Spacer) {\n  inherits(CustomControlSpacer, _Spacer);\n\n  function CustomControlSpacer() {\n    classCallCheck(this, CustomControlSpacer);\n    return possibleConstructorReturn(this, _Spacer.apply(this, arguments));\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  CustomControlSpacer.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-custom-control-spacer ' + _Spacer.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  CustomControlSpacer.prototype.createEl = function createEl() {\n    var el = _Spacer.prototype.createEl.call(this, {\n      className: this.buildCSSClass()\n    });\n\n    // No-flex/table-cell mode requires there be some content\n    // in the cell to fill the remaining space of the table.\n    el.innerHTML = '\\xA0';\n    return el;\n  };\n\n  return CustomControlSpacer;\n}(Spacer);\n\nComponent.registerComponent('CustomControlSpacer', CustomControlSpacer);\n\n/**\n * @file control-bar.js\n */\n// Required children\n/**\n * Container of main controls.\n *\n * @extends Component\n */\n\nvar ControlBar = function (_Component) {\n  inherits(ControlBar, _Component);\n\n  function ControlBar() {\n    classCallCheck(this, ControlBar);\n    return possibleConstructorReturn(this, _Component.apply(this, arguments));\n  }\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ControlBar.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-control-bar',\n      dir: 'ltr'\n    });\n  };\n\n  return ControlBar;\n}(Component);\n\n/**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n\n\nControlBar.prototype.options_ = {\n  children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n};\n\nComponent.registerComponent('ControlBar', ControlBar);\n\n/**\n * @file error-display.js\n */\n/**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n\nvar ErrorDisplay = function (_ModalDialog) {\n  inherits(ErrorDisplay, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ErrorDisplay(player, options) {\n    classCallCheck(this, ErrorDisplay);\n\n    var _this = possibleConstructorReturn(this, _ModalDialog.call(this, player, options));\n\n    _this.on(player, 'error', _this.open);\n    return _this;\n  }\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  ErrorDisplay.prototype.buildCSSClass = function buildCSSClass() {\n    return 'vjs-error-display ' + _ModalDialog.prototype.buildCSSClass.call(this);\n  };\n\n  /**\n   * Gets the localized error message based on the `Player`s error.\n   *\n   * @return {string}\n   *         The `Player`s error message localized or an empty string.\n   */\n\n\n  ErrorDisplay.prototype.content = function content() {\n    var error = this.player().error();\n\n    return error ? this.localize(error.message) : '';\n  };\n\n  return ErrorDisplay;\n}(ModalDialog);\n\n/**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n\n\nErrorDisplay.prototype.options_ = mergeOptions(ModalDialog.prototype.options_, {\n  pauseOnOpen: false,\n  fillAlways: true,\n  temporary: false,\n  uncloseable: true\n});\n\nComponent.registerComponent('ErrorDisplay', ErrorDisplay);\n\n/**\n * @file text-track-settings.js\n */\nvar LOCAL_STORAGE_KEY = 'vjs-text-track-settings';\n\nvar COLOR_BLACK = ['#000', 'Black'];\nvar COLOR_BLUE = ['#00F', 'Blue'];\nvar COLOR_CYAN = ['#0FF', 'Cyan'];\nvar COLOR_GREEN = ['#0F0', 'Green'];\nvar COLOR_MAGENTA = ['#F0F', 'Magenta'];\nvar COLOR_RED = ['#F00', 'Red'];\nvar COLOR_WHITE = ['#FFF', 'White'];\nvar COLOR_YELLOW = ['#FF0', 'Yellow'];\n\nvar OPACITY_OPAQUE = ['1', 'Opaque'];\nvar OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\nvar OPACITY_TRANS = ['0', 'Transparent'];\n\n// Configuration for the various <select> elements in the DOM of this component.\n//\n// Possible keys include:\n//\n// `default`:\n//   The default option index. Only needs to be provided if not zero.\n// `parser`:\n//   A function which is used to parse the value from the selected option in\n//   a customized way.\n// `selector`:\n//   The selector used to find the associated <select> element.\nvar selectConfigs = {\n  backgroundColor: {\n    selector: '.vjs-bg-color > select',\n    id: 'captions-background-color-%s',\n    label: 'Color',\n    options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n\n  backgroundOpacity: {\n    selector: '.vjs-bg-opacity > select',\n    id: 'captions-background-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n  },\n\n  color: {\n    selector: '.vjs-fg-color > select',\n    id: 'captions-foreground-color-%s',\n    label: 'Color',\n    options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n\n  edgeStyle: {\n    selector: '.vjs-edge-style > select',\n    id: '%s',\n    label: 'Text Edge Style',\n    options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n  },\n\n  fontFamily: {\n    selector: '.vjs-font-family > select',\n    id: 'captions-font-family-%s',\n    label: 'Font Family',\n    options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n  },\n\n  fontPercent: {\n    selector: '.vjs-font-percent > select',\n    id: 'captions-font-size-%s',\n    label: 'Font Size',\n    options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n    'default': 2,\n    parser: function parser(v) {\n      return v === '1.00' ? null : Number(v);\n    }\n  },\n\n  textOpacity: {\n    selector: '.vjs-text-opacity > select',\n    id: 'captions-foreground-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI]\n  },\n\n  // Options for this object are defined below.\n  windowColor: {\n    selector: '.vjs-window-color > select',\n    id: 'captions-window-color-%s',\n    label: 'Color'\n  },\n\n  // Options for this object are defined below.\n  windowOpacity: {\n    selector: '.vjs-window-opacity > select',\n    id: 'captions-window-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n  }\n};\n\nselectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n\n/**\n * Get the actual value of an option.\n *\n * @param  {string} value\n *         The value to get\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\nfunction parseOptionValue(value, parser) {\n  if (parser) {\n    value = parser(value);\n  }\n\n  if (value && value !== 'none') {\n    return value;\n  }\n}\n\n/**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param  {Element} el\n *         the element to look in\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\nfunction getSelectedOptionValue(el, parser) {\n  var value = el.options[el.options.selectedIndex].value;\n\n  return parseOptionValue(value, parser);\n}\n\n/**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n *        The element to look in.\n *\n * @param {string} value\n *        the property to look on.\n *\n * @param {Function} [parser]\n *        Optional function to adjust the value before comparing.\n *\n * @private\n */\nfunction setSelectedOption(el, value, parser) {\n  if (!value) {\n    return;\n  }\n\n  for (var i = 0; i < el.options.length; i++) {\n    if (parseOptionValue(el.options[i].value, parser) === value) {\n      el.selectedIndex = i;\n      break;\n    }\n  }\n}\n\n/**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n\nvar TextTrackSettings = function (_ModalDialog) {\n  inherits(TextTrackSettings, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *         The key/value store of player options.\n   */\n  function TextTrackSettings(player, options) {\n    classCallCheck(this, TextTrackSettings);\n\n    options.temporary = false;\n\n    var _this = possibleConstructorReturn(this, _ModalDialog.call(this, player, options));\n\n    _this.updateDisplay = bind(_this, _this.updateDisplay);\n\n    // fill the modal and pretend we have opened it\n    _this.fill();\n    _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;\n\n    _this.endDialog = createEl('p', {\n      className: 'vjs-control-text',\n      textContent: _this.localize('End of dialog window.')\n    });\n    _this.el().appendChild(_this.endDialog);\n\n    _this.setDefaults();\n\n    // Grab `persistTextTrackSettings` from the player options if not passed in child options\n    if (options.persistTextTrackSettings === undefined) {\n      _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;\n    }\n\n    _this.on(_this.$('.vjs-done-button'), 'click', function () {\n      _this.saveSettings();\n      _this.close();\n    });\n\n    _this.on(_this.$('.vjs-default-button'), 'click', function () {\n      _this.setDefaults();\n      _this.updateDisplay();\n    });\n\n    each(selectConfigs, function (config) {\n      _this.on(_this.$(config.selector), 'change', _this.updateDisplay);\n    });\n\n    if (_this.options_.persistTextTrackSettings) {\n      _this.restoreSettings();\n    }\n    return _this;\n  }\n\n  TextTrackSettings.prototype.dispose = function dispose() {\n    this.endDialog = null;\n\n    _ModalDialog.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create a <select> element with configured options.\n   *\n   * @param {string} key\n   *        Configuration key to use during creation.\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElSelect_ = function createElSelect_(key) {\n    var _this2 = this;\n\n    var legendId = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';\n    var type = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'label';\n\n    var config = selectConfigs[key];\n    var id = config.id.replace('%s', this.id_);\n    var selectLabelledbyIds = [legendId, id].join(' ').trim();\n\n    return ['<' + type + ' id=\"' + id + '\" class=\"' + (type === 'label' ? 'vjs-label' : '') + '\">', this.localize(config.label), '</' + type + '>', '<select aria-labelledby=\"' + selectLabelledbyIds + '\">'].concat(config.options.map(function (o) {\n      var optionId = id + '-' + o[1].replace(/\\W+/g, '');\n\n      return ['<option id=\"' + optionId + '\" value=\"' + o[0] + '\" ', 'aria-labelledby=\"' + selectLabelledbyIds + ' ' + optionId + '\">', _this2.localize(o[1]), '</option>'].join('');\n    })).concat('</select>').join('');\n  };\n\n  /**\n   * Create foreground color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElFgColor_ = function createElFgColor_() {\n    var legendId = 'captions-text-legend-' + this.id_;\n\n    return ['<fieldset class=\"vjs-fg-color vjs-track-setting\">', '<legend id=\"' + legendId + '\">', this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n  };\n\n  /**\n   * Create background color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElBgColor_ = function createElBgColor_() {\n    var legendId = 'captions-background-' + this.id_;\n\n    return ['<fieldset class=\"vjs-bg-color vjs-track-setting\">', '<legend id=\"' + legendId + '\">', this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n  };\n\n  /**\n   * Create window color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElWinColor_ = function createElWinColor_() {\n    var legendId = 'captions-window-' + this.id_;\n\n    return ['<fieldset class=\"vjs-window-color vjs-track-setting\">', '<legend id=\"' + legendId + '\">', this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n  };\n\n  /**\n   * Create color elements for the component\n   *\n   * @return {Element}\n   *         The element that was created\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElColors_ = function createElColors_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-colors',\n      innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n    });\n  };\n\n  /**\n   * Create font elements for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElFont_ = function createElFont_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-font',\n      innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n    });\n  };\n\n  /**\n   * Create controls for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.createElControls_ = function createElControls_() {\n    var defaultsDescription = this.localize('restore all settings to the default values');\n\n    return createEl('div', {\n      className: 'vjs-track-settings-controls',\n      innerHTML: ['<button type=\"button\" class=\"vjs-default-button\" title=\"' + defaultsDescription + '\">', this.localize('Reset'), '<span class=\"vjs-control-text\"> ' + defaultsDescription + '</span>', '</button>', '<button type=\"button\" class=\"vjs-done-button\">' + this.localize('Done') + '</button>'].join('')\n    });\n  };\n\n  TextTrackSettings.prototype.content = function content() {\n    return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n  };\n\n  TextTrackSettings.prototype.label = function label() {\n    return this.localize('Caption Settings Dialog');\n  };\n\n  TextTrackSettings.prototype.description = function description() {\n    return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n  };\n\n  TextTrackSettings.prototype.buildCSSClass = function buildCSSClass() {\n    return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';\n  };\n\n  /**\n   * Gets an object of text track settings (or null).\n   *\n   * @return {Object}\n   *         An object with config values parsed from the DOM or localStorage.\n   */\n\n\n  TextTrackSettings.prototype.getValues = function getValues() {\n    var _this3 = this;\n\n    return reduce(selectConfigs, function (accum, config, key) {\n      var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);\n\n      if (value !== undefined) {\n        accum[key] = value;\n      }\n\n      return accum;\n    }, {});\n  };\n\n  /**\n   * Sets text track settings from an object of values.\n   *\n   * @param {Object} values\n   *        An object with config values parsed from the DOM or localStorage.\n   */\n\n\n  TextTrackSettings.prototype.setValues = function setValues(values) {\n    var _this4 = this;\n\n    each(selectConfigs, function (config, key) {\n      setSelectedOption(_this4.$(config.selector), values[key], config.parser);\n    });\n  };\n\n  /**\n   * Sets all `<select>` elements to their default values.\n   */\n\n\n  TextTrackSettings.prototype.setDefaults = function setDefaults() {\n    var _this5 = this;\n\n    each(selectConfigs, function (config) {\n      var index = config.hasOwnProperty('default') ? config['default'] : 0;\n\n      _this5.$(config.selector).selectedIndex = index;\n    });\n  };\n\n  /**\n   * Restore texttrack settings from localStorage\n   */\n\n\n  TextTrackSettings.prototype.restoreSettings = function restoreSettings() {\n    var values = void 0;\n\n    try {\n      values = JSON.parse(window.localStorage.getItem(LOCAL_STORAGE_KEY));\n    } catch (err) {\n      log.warn(err);\n    }\n\n    if (values) {\n      this.setValues(values);\n    }\n  };\n\n  /**\n   * Save text track settings to localStorage\n   */\n\n\n  TextTrackSettings.prototype.saveSettings = function saveSettings() {\n    if (!this.options_.persistTextTrackSettings) {\n      return;\n    }\n\n    var values = this.getValues();\n\n    try {\n      if (Object.keys(values).length) {\n        window.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(values));\n      } else {\n        window.localStorage.removeItem(LOCAL_STORAGE_KEY);\n      }\n    } catch (err) {\n      log.warn(err);\n    }\n  };\n\n  /**\n   * Update display of text track settings\n   */\n\n\n  TextTrackSettings.prototype.updateDisplay = function updateDisplay() {\n    var ttDisplay = this.player_.getChild('textTrackDisplay');\n\n    if (ttDisplay) {\n      ttDisplay.updateDisplay();\n    }\n  };\n\n  /**\n   * conditionally blur the element and refocus the captions button\n   *\n   * @private\n   */\n\n\n  TextTrackSettings.prototype.conditionalBlur_ = function conditionalBlur_() {\n    this.previouslyActiveEl_ = null;\n    this.off(document, 'keydown', this.handleKeyDown);\n\n    var cb = this.player_.controlBar;\n    var subsCapsBtn = cb && cb.subsCapsButton;\n    var ccBtn = cb && cb.captionsButton;\n\n    if (subsCapsBtn) {\n      subsCapsBtn.focus();\n    } else if (ccBtn) {\n      ccBtn.focus();\n    }\n  };\n\n  return TextTrackSettings;\n}(ModalDialog);\n\nComponent.registerComponent('TextTrackSettings', TextTrackSettings);\n\n/**\n * @file resize-manager.js\n */\n/**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n *   resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n\nvar ResizeManager = function (_Component) {\n  inherits(ResizeManager, _Component);\n\n  /**\n   * Create the ResizeManager.\n   *\n   * @param {Object} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of ResizeManager options.\n   *\n   * @param {Object} [options.ResizeObserver]\n   *        A polyfill for ResizeObserver can be passed in here.\n   *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n   */\n  function ResizeManager(player, options) {\n    classCallCheck(this, ResizeManager);\n\n    var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window.ResizeObserver;\n\n    // if `null` was passed, we want to disable the ResizeObserver\n    if (options.ResizeObserver === null) {\n      RESIZE_OBSERVER_AVAILABLE = false;\n    }\n\n    // Only create an element when ResizeObserver isn't available\n    var options_ = mergeOptions({ createEl: !RESIZE_OBSERVER_AVAILABLE }, options);\n\n    var _this = possibleConstructorReturn(this, _Component.call(this, player, options_));\n\n    _this.ResizeObserver = options.ResizeObserver || window.ResizeObserver;\n    _this.loadListener_ = null;\n    _this.resizeObserver_ = null;\n    _this.debouncedHandler_ = debounce(function () {\n      _this.resizeHandler();\n    }, 100, false, _this);\n\n    if (RESIZE_OBSERVER_AVAILABLE) {\n      _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);\n      _this.resizeObserver_.observe(player.el());\n    } else {\n      _this.loadListener_ = function () {\n        if (!_this.el_ || !_this.el_.contentWindow) {\n          return;\n        }\n\n        on(_this.el_.contentWindow, 'resize', _this.debouncedHandler_);\n      };\n\n      _this.one('load', _this.loadListener_);\n    }\n    return _this;\n  }\n\n  ResizeManager.prototype.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'iframe', {\n      className: 'vjs-resize-manager'\n    });\n  };\n\n  /**\n   * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n   *\n   * @fires Player#playerresize\n   */\n\n\n  ResizeManager.prototype.resizeHandler = function resizeHandler() {\n    /**\n     * Called when the player size has changed\n     *\n     * @event Player#playerresize\n     * @type {EventTarget~Event}\n     */\n    // make sure player is still around to trigger\n    // prevents this from causing an error after dispose\n    if (!this.player_ || !this.player_.trigger) {\n      return;\n    }\n\n    this.player_.trigger('playerresize');\n  };\n\n  ResizeManager.prototype.dispose = function dispose() {\n    if (this.debouncedHandler_) {\n      this.debouncedHandler_.cancel();\n    }\n\n    if (this.resizeObserver_) {\n      if (this.player_.el()) {\n        this.resizeObserver_.unobserve(this.player_.el());\n      }\n      this.resizeObserver_.disconnect();\n    }\n\n    if (this.el_ && this.el_.contentWindow) {\n      off(this.el_.contentWindow, 'resize', this.debouncedHandler_);\n    }\n\n    if (this.loadListener_) {\n      this.off('load', this.loadListener_);\n    }\n\n    this.ResizeObserver = null;\n    this.resizeObserver = null;\n    this.debouncedHandler_ = null;\n    this.loadListener_ = null;\n  };\n\n  return ResizeManager;\n}(Component);\n\nComponent.registerComponent('ResizeManager', ResizeManager);\n\n/**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param {Html5} tech\n *        The tech object that sourceset was setup on\n *\n * @return {boolean}\n *         returns false if the sourceset was not fired and true otherwise.\n */\nvar sourcesetLoad = function sourcesetLoad(tech) {\n  var el = tech.el();\n\n  // if `el.src` is set, that source will be loaded.\n  if (el.hasAttribute('src')) {\n    tech.triggerSourceset(el.src);\n    return true;\n  }\n\n  /**\n   * Since there isn't a src property on the media element, source elements will be used for\n   * implementing the source selection algorithm. This happens asynchronously and\n   * for most cases were there is more than one source we cannot tell what source will\n   * be loaded, without re-implementing the source selection algorithm. At this time we are not\n   * going to do that. There are three special cases that we do handle here though:\n   *\n   * 1. If there are no sources, do not fire `sourceset`.\n   * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n   * 3. If there is more than one `<source>` but all of them have the same `src` url.\n   *    That will be our src.\n   */\n  var sources = tech.$$('source');\n  var srcUrls = [];\n  var src = '';\n\n  // if there are no sources, do not fire sourceset\n  if (!sources.length) {\n    return false;\n  }\n\n  // only count valid/non-duplicate source elements\n  for (var i = 0; i < sources.length; i++) {\n    var url = sources[i].src;\n\n    if (url && srcUrls.indexOf(url) === -1) {\n      srcUrls.push(url);\n    }\n  }\n\n  // there were no valid sources\n  if (!srcUrls.length) {\n    return false;\n  }\n\n  // there is only one valid source element url\n  // use that\n  if (srcUrls.length === 1) {\n    src = srcUrls[0];\n  }\n\n  tech.triggerSourceset(src);\n  return true;\n};\n\n/**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\nvar innerHTMLDescriptorPolyfill = {};\n\nif (!IS_IE8) {\n  innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n    get: function get() {\n      return this.cloneNode(true).innerHTML;\n    },\n    set: function set(v) {\n      // make a dummy node to use innerHTML on\n      var dummy = document.createElement(this.nodeName.toLowerCase());\n\n      // set innerHTML to the value provided\n      dummy.innerHTML = v;\n\n      // make a document fragment to hold the nodes from dummy\n      var docFrag = document.createDocumentFragment();\n\n      // copy all of the nodes created by the innerHTML on dummy\n      // to the document fragment\n      while (dummy.childNodes.length) {\n        docFrag.appendChild(dummy.childNodes[0]);\n      }\n\n      // remove content\n      this.innerText = '';\n\n      // now we add all of that html in one by appending the\n      // document fragment. This is how innerHTML does it.\n      window.Element.prototype.appendChild.call(this, docFrag);\n\n      // then return the result that innerHTML's setter would\n      return this.innerHTML;\n    }\n  });\n}\n/**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\nvar getDescriptor = function getDescriptor(priority, prop) {\n  var descriptor = {};\n\n  for (var i = 0; i < priority.length; i++) {\n    descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n\n    if (descriptor && descriptor.set && descriptor.get) {\n      break;\n    }\n  }\n\n  descriptor.enumerable = true;\n  descriptor.configurable = true;\n\n  return descriptor;\n};\n\nvar getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {\n  return getDescriptor([tech.el(), window.HTMLMediaElement.prototype, window.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n};\n\n/**\n * Patches browser internal functions so that we can tell syncronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element\n * - `innerHTML` -  can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n *        The tech object that sourceset is being setup on.\n */\nvar firstSourceWatch = function firstSourceWatch(tech) {\n  var el = tech.el();\n\n  // make sure firstSourceWatch isn't setup twice.\n  if (el.resetSourceWatch_) {\n    return;\n  }\n\n  var old = {};\n  var innerDescriptor = getInnerHTMLDescriptor(tech);\n  var appendWrapper = function appendWrapper(appendFn) {\n    return function () {\n      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var retval = appendFn.apply(el, args);\n\n      sourcesetLoad(tech);\n\n      return retval;\n    };\n  };\n\n  ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {\n    if (!el[k]) {\n      return;\n    }\n\n    // store the old function\n    old[k] = el[k];\n\n    // call the old function with a sourceset if a source\n    // was loaded\n    el[k] = appendWrapper(old[k]);\n  });\n\n  Object.defineProperty(el, 'innerHTML', mergeOptions(innerDescriptor, {\n    set: appendWrapper(innerDescriptor.set)\n  }));\n\n  el.resetSourceWatch_ = function () {\n    el.resetSourceWatch_ = null;\n    Object.keys(old).forEach(function (k) {\n      el[k] = old[k];\n    });\n\n    Object.defineProperty(el, 'innerHTML', innerDescriptor);\n  };\n\n  // on the first sourceset, we need to revert our changes\n  tech.one('sourceset', el.resetSourceWatch_);\n};\n\n/**\n * our implementation of a `src` descriptor for browsers\n * that do not have one.\n */\n\nvar srcDescriptorPolyfill = {};\n\nif (!IS_IE8) {\n  srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n    get: function get() {\n      if (this.hasAttribute('src')) {\n        return getAbsoluteURL(window.Element.prototype.getAttribute.call(this, 'src'));\n      }\n\n      return '';\n    },\n    set: function set(v) {\n      window.Element.prototype.setAttribute.call(this, 'src', v);\n\n      return v;\n    }\n  });\n}\n\nvar getSrcDescriptor = function getSrcDescriptor(tech) {\n  return getDescriptor([tech.el(), window.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n};\n\n/**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n *              cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n *        The tech to patch\n */\nvar setupSourceset = function setupSourceset(tech) {\n  if (!tech.featuresSourceset) {\n    return;\n  }\n\n  var el = tech.el();\n\n  // make sure sourceset isn't setup twice.\n  if (el.resetSourceset_) {\n    return;\n  }\n\n  var srcDescriptor = getSrcDescriptor(tech);\n  var oldSetAttribute = el.setAttribute;\n  var oldLoad = el.load;\n\n  Object.defineProperty(el, 'src', mergeOptions(srcDescriptor, {\n    set: function set(v) {\n      var retval = srcDescriptor.set.call(el, v);\n\n      // we use the getter here to get the actual value set on src\n      tech.triggerSourceset(el.src);\n\n      return retval;\n    }\n  }));\n\n  el.setAttribute = function (n, v) {\n    var retval = oldSetAttribute.call(el, n, v);\n\n    if (/src/i.test(n)) {\n      tech.triggerSourceset(el.src);\n    }\n\n    return retval;\n  };\n\n  el.load = function () {\n    var retval = oldLoad.call(el);\n\n    // if load was called, but there was no source to fire\n    // sourceset on. We have to watch for a source append\n    // as that can trigger a `sourceset` when the media element\n    // has no source\n    if (!sourcesetLoad(tech)) {\n      tech.triggerSourceset('');\n      firstSourceWatch(tech);\n    }\n\n    return retval;\n  };\n\n  if (el.currentSrc) {\n    tech.triggerSourceset(el.currentSrc);\n  } else if (!sourcesetLoad(tech)) {\n    firstSourceWatch(tech);\n  }\n\n  el.resetSourceset_ = function () {\n    el.resetSourceset_ = null;\n    el.load = oldLoad;\n    el.setAttribute = oldSetAttribute;\n    Object.defineProperty(el, 'src', srcDescriptor);\n    if (el.resetSourceWatch_) {\n      el.resetSourceWatch_();\n    }\n  };\n};\n\nvar _templateObject$2 = taggedTemplateLiteralLoose(['Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n            This may prevent text tracks from loading.'], ['Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n            This may prevent text tracks from loading.']);\n\n/**\n * @file html5.js\n */\n/**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SouceHandlerAdditions\n * @extends Tech\n */\n\nvar Html5 = function (_Tech) {\n  inherits(Html5, _Tech);\n\n  /**\n   * Create an instance of this Tech.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} ready\n   *        Callback function to call when the `HTML5` Tech is ready.\n   */\n  function Html5(options, ready) {\n    classCallCheck(this, Html5);\n\n    var _this = possibleConstructorReturn(this, _Tech.call(this, options, ready));\n\n    var source = options.source;\n    var crossoriginTracks = false;\n\n    // Set the source if one is provided\n    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n    // anyway so the error gets fired.\n    if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n      _this.setSource(source);\n    } else {\n      _this.handleLateInit_(_this.el_);\n    }\n\n    // setup sourceset after late sourceset/init\n    if (options.enableSourceset) {\n      _this.setupSourcesetHandling_();\n    }\n\n    if (_this.el_.hasChildNodes()) {\n\n      var nodes = _this.el_.childNodes;\n      var nodesLength = nodes.length;\n      var removeNodes = [];\n\n      while (nodesLength--) {\n        var node = nodes[nodesLength];\n        var nodeName = node.nodeName.toLowerCase();\n\n        if (nodeName === 'track') {\n          if (!_this.featuresNativeTextTracks) {\n            // Empty video tag tracks so the built-in player doesn't use them also.\n            // This may not be fast enough to stop HTML5 browsers from reading the tags\n            // so we'll need to turn off any default tracks if we're manually doing\n            // captions and subtitles. videoElement.textTracks\n            removeNodes.push(node);\n          } else {\n            // store HTMLTrackElement and TextTrack to remote list\n            _this.remoteTextTrackEls().addTrackElement_(node);\n            _this.remoteTextTracks().addTrack(node.track);\n            _this.textTracks().addTrack(node.track);\n            if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n              crossoriginTracks = true;\n            }\n          }\n        }\n      }\n\n      for (var i = 0; i < removeNodes.length; i++) {\n        _this.el_.removeChild(removeNodes[i]);\n      }\n    }\n\n    _this.proxyNativeTracks_();\n    if (_this.featuresNativeTextTracks && crossoriginTracks) {\n      log.warn(tsml(_templateObject$2));\n    }\n\n    // prevent iOS Safari from disabling metadata text tracks during native playback\n    _this.restoreMetadataTracksInIOSNativePlayer_();\n\n    // Determine if native controls should be used\n    // Our goal should be to get the custom controls on mobile solid everywhere\n    // so we can remove this all together. Right now this will block custom\n    // controls on touch enabled laptops like the Chrome Pixel\n    if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {\n      _this.setControls(true);\n    }\n\n    // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n    // into a `fullscreenchange` event\n    _this.proxyWebkitFullscreen_();\n\n    _this.triggerReady();\n    return _this;\n  }\n\n  /**\n   * Dispose of `HTML5` media element and remove all tracks.\n   */\n\n\n  Html5.prototype.dispose = function dispose() {\n    if (this.el_ && this.el_.resetSourceset_) {\n      this.el_.resetSourceset_();\n    }\n    Html5.disposeMediaElement(this.el_);\n    this.options_ = null;\n\n    // tech will handle clearing of the emulated track list\n    _Tech.prototype.dispose.call(this);\n  };\n\n  /**\n   * Modify the media element so that we can detect when\n   * the source is changed. Fires `sourceset` just after the source has changed\n   */\n\n\n  Html5.prototype.setupSourcesetHandling_ = function setupSourcesetHandling_() {\n    setupSourceset(this);\n  };\n\n  /**\n   * When a captions track is enabled in the iOS Safari native player, all other\n   * tracks are disabled (including metadata tracks), which nulls all of their\n   * associated cue points. This will restore metadata tracks to their pre-fullscreen\n   * state in those cases so that cue points are not needlessly lost.\n   *\n   * @private\n   */\n\n\n  Html5.prototype.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {\n    var textTracks = this.textTracks();\n    var metadataTracksPreFullscreenState = void 0;\n\n    // captures a snapshot of every metadata track's current state\n    var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {\n      metadataTracksPreFullscreenState = [];\n\n      for (var i = 0; i < textTracks.length; i++) {\n        var track = textTracks[i];\n\n        if (track.kind === 'metadata') {\n          metadataTracksPreFullscreenState.push({\n            track: track,\n            storedMode: track.mode\n          });\n        }\n      }\n    };\n\n    // snapshot each metadata track's initial state, and update the snapshot\n    // each time there is a track 'change' event\n    takeMetadataTrackSnapshot();\n    textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n\n    this.on('dispose', function () {\n      return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n    });\n\n    var restoreTrackMode = function restoreTrackMode() {\n      for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n        var storedTrack = metadataTracksPreFullscreenState[i];\n\n        if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n          storedTrack.track.mode = storedTrack.storedMode;\n        }\n      }\n      // we only want this handler to be executed on the first 'change' event\n      textTracks.removeEventListener('change', restoreTrackMode);\n    };\n\n    // when we enter fullscreen playback, stop updating the snapshot and\n    // restore all track modes to their pre-fullscreen state\n    this.on('webkitbeginfullscreen', function () {\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', restoreTrackMode);\n      textTracks.addEventListener('change', restoreTrackMode);\n    });\n\n    // start updating the snapshot again after leaving fullscreen\n    this.on('webkitendfullscreen', function () {\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n      textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n\n      // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n      textTracks.removeEventListener('change', restoreTrackMode);\n    });\n  };\n\n  /**\n   * Proxy all native track list events to our track lists if the browser we are playing\n   * in supports that type of track list.\n   *\n   * @private\n   */\n\n\n  Html5.prototype.proxyNativeTracks_ = function proxyNativeTracks_() {\n    var _this2 = this;\n\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n      var elTracks = _this2.el()[props.getterName];\n      var techTracks = _this2[props.getterName]();\n\n      if (!_this2['featuresNative' + props.capitalName + 'Tracks'] || !elTracks || !elTracks.addEventListener) {\n        return;\n      }\n      var listeners = {\n        change: function change(e) {\n          techTracks.trigger({\n            type: 'change',\n            target: techTracks,\n            currentTarget: techTracks,\n            srcElement: techTracks\n          });\n        },\n        addtrack: function addtrack(e) {\n          techTracks.addTrack(e.track);\n        },\n        removetrack: function removetrack(e) {\n          techTracks.removeTrack(e.track);\n        }\n      };\n      var removeOldTracks = function removeOldTracks() {\n        var removeTracks = [];\n\n        for (var i = 0; i < techTracks.length; i++) {\n          var found = false;\n\n          for (var j = 0; j < elTracks.length; j++) {\n            if (elTracks[j] === techTracks[i]) {\n              found = true;\n              break;\n            }\n          }\n\n          if (!found) {\n            removeTracks.push(techTracks[i]);\n          }\n        }\n\n        while (removeTracks.length) {\n          techTracks.removeTrack(removeTracks.shift());\n        }\n      };\n\n      Object.keys(listeners).forEach(function (eventName) {\n        var listener = listeners[eventName];\n\n        elTracks.addEventListener(eventName, listener);\n        _this2.on('dispose', function (e) {\n          return elTracks.removeEventListener(eventName, listener);\n        });\n      });\n\n      // Remove (native) tracks that are not used anymore\n      _this2.on('loadstart', removeOldTracks);\n      _this2.on('dispose', function (e) {\n        return _this2.off('loadstart', removeOldTracks);\n      });\n    });\n  };\n\n  /**\n   * Create the `Html5` Tech's DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  Html5.prototype.createEl = function createEl$$1() {\n    var el = this.options_.tag;\n\n    // Check if this browser supports moving the element into the box.\n    // On the iPhone video will break if you move the element,\n    // So we have to create a brand new element.\n    // If we ingested the player div, we do not need to move the media element.\n    if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n\n      // If the original tag is still there, clone and remove it.\n      if (el) {\n        var clone = el.cloneNode(true);\n\n        if (el.parentNode) {\n          el.parentNode.insertBefore(clone, el);\n        }\n        Html5.disposeMediaElement(el);\n        el = clone;\n      } else {\n        el = document.createElement('video');\n\n        // determine if native controls should be used\n        var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n        var attributes = mergeOptions({}, tagAttributes);\n\n        if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n          delete attributes.controls;\n        }\n\n        setAttributes(el, assign(attributes, {\n          id: this.options_.techId,\n          'class': 'vjs-tech'\n        }));\n      }\n\n      el.playerId = this.options_.playerId;\n    }\n\n    if (typeof this.options_.preload !== 'undefined') {\n      setAttribute(el, 'preload', this.options_.preload);\n    }\n\n    // Update specific tag settings, in case they were overridden\n    // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n    // when iOS/Safari or other browsers attempt to autoplay.\n    var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n\n    for (var i = 0; i < settingsAttrs.length; i++) {\n      var attr = settingsAttrs[i];\n      var value = this.options_[attr];\n\n      if (typeof value !== 'undefined') {\n        if (value) {\n          setAttribute(el, attr, attr);\n        } else {\n          removeAttribute(el, attr);\n        }\n        el[attr] = value;\n      }\n    }\n\n    return el;\n  };\n\n  /**\n   * This will be triggered if the loadstart event has already fired, before videojs was\n   * ready. Two known examples of when this can happen are:\n   * 1. If we're loading the playback object after it has started loading\n   * 2. The media is already playing the (often with autoplay on) then\n   *\n   * This function will fire another loadstart so that videojs can catchup.\n   *\n   * @fires Tech#loadstart\n   *\n   * @return {undefined}\n   *         returns nothing.\n   */\n\n\n  Html5.prototype.handleLateInit_ = function handleLateInit_(el) {\n    if (el.networkState === 0 || el.networkState === 3) {\n      // The video element hasn't started loading the source yet\n      // or didn't find a source\n      return;\n    }\n\n    if (el.readyState === 0) {\n      // NetworkState is set synchronously BUT loadstart is fired at the\n      // end of the current stack, usually before setInterval(fn, 0).\n      // So at this point we know loadstart may have already fired or is\n      // about to fire, and either way the player hasn't seen it yet.\n      // We don't want to fire loadstart prematurely here and cause a\n      // double loadstart so we'll wait and see if it happens between now\n      // and the next loop, and fire it if not.\n      // HOWEVER, we also want to make sure it fires before loadedmetadata\n      // which could also happen between now and the next loop, so we'll\n      // watch for that also.\n      var loadstartFired = false;\n      var setLoadstartFired = function setLoadstartFired() {\n        loadstartFired = true;\n      };\n\n      this.on('loadstart', setLoadstartFired);\n\n      var triggerLoadstart = function triggerLoadstart() {\n        // We did miss the original loadstart. Make sure the player\n        // sees loadstart before loadedmetadata\n        if (!loadstartFired) {\n          this.trigger('loadstart');\n        }\n      };\n\n      this.on('loadedmetadata', triggerLoadstart);\n\n      this.ready(function () {\n        this.off('loadstart', setLoadstartFired);\n        this.off('loadedmetadata', triggerLoadstart);\n\n        if (!loadstartFired) {\n          // We did miss the original native loadstart. Fire it now.\n          this.trigger('loadstart');\n        }\n      });\n\n      return;\n    }\n\n    // From here on we know that loadstart already fired and we missed it.\n    // The other readyState events aren't as much of a problem if we double\n    // them, so not going to go to as much trouble as loadstart to prevent\n    // that unless we find reason to.\n    var eventsToTrigger = ['loadstart'];\n\n    // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n    eventsToTrigger.push('loadedmetadata');\n\n    // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n    if (el.readyState >= 2) {\n      eventsToTrigger.push('loadeddata');\n    }\n\n    // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n    if (el.readyState >= 3) {\n      eventsToTrigger.push('canplay');\n    }\n\n    // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n    if (el.readyState >= 4) {\n      eventsToTrigger.push('canplaythrough');\n    }\n\n    // We still need to give the player time to add event listeners\n    this.ready(function () {\n      eventsToTrigger.forEach(function (type) {\n        this.trigger(type);\n      }, this);\n    });\n  };\n\n  /**\n   * Set current time for the `HTML5` tech.\n   *\n   * @param {number} seconds\n   *        Set the current time of the media to this.\n   */\n\n\n  Html5.prototype.setCurrentTime = function setCurrentTime(seconds) {\n    try {\n      this.el_.currentTime = seconds;\n    } catch (e) {\n      log(e, 'Video is not ready. (Video.js)');\n      // this.warning(VideoJS.warnings.videoNotReady);\n    }\n  };\n\n  /**\n   * Get the current duration of the HTML5 media element.\n   *\n   * @return {number}\n   *         The duration of the media or 0 if there is no duration.\n   */\n\n\n  Html5.prototype.duration = function duration() {\n    var _this3 = this;\n\n    // Android Chrome will report duration as Infinity for VOD HLS until after\n    // playback has started, which triggers the live display erroneously.\n    // Return NaN if playback has not started and trigger a durationupdate once\n    // the duration can be reliably known.\n    if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n      // Wait for the first `timeupdate` with currentTime > 0 - there may be\n      // several with 0\n      var checkProgress = function checkProgress() {\n        if (_this3.el_.currentTime > 0) {\n          // Trigger durationchange for genuinely live video\n          if (_this3.el_.duration === Infinity) {\n            _this3.trigger('durationchange');\n          }\n          _this3.off('timeupdate', checkProgress);\n        }\n      };\n\n      this.on('timeupdate', checkProgress);\n      return NaN;\n    }\n    return this.el_.duration || NaN;\n  };\n\n  /**\n   * Get the current width of the HTML5 media element.\n   *\n   * @return {number}\n   *         The width of the HTML5 media element.\n   */\n\n\n  Html5.prototype.width = function width() {\n    return this.el_.offsetWidth;\n  };\n\n  /**\n   * Get the current height of the HTML5 media element.\n   *\n   * @return {number}\n   *         The heigth of the HTML5 media element.\n   */\n\n\n  Html5.prototype.height = function height() {\n    return this.el_.offsetHeight;\n  };\n\n  /**\n   * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n   * `fullscreenchange` event.\n   *\n   * @private\n   * @fires fullscreenchange\n   * @listens webkitendfullscreen\n   * @listens webkitbeginfullscreen\n   * @listens webkitbeginfullscreen\n   */\n\n\n  Html5.prototype.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {\n    var _this4 = this;\n\n    if (!('webkitDisplayingFullscreen' in this.el_)) {\n      return;\n    }\n\n    var endFn = function endFn() {\n      this.trigger('fullscreenchange', { isFullscreen: false });\n    };\n\n    var beginFn = function beginFn() {\n      if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n        this.one('webkitendfullscreen', endFn);\n\n        this.trigger('fullscreenchange', { isFullscreen: true });\n      }\n    };\n\n    this.on('webkitbeginfullscreen', beginFn);\n    this.on('dispose', function () {\n      _this4.off('webkitbeginfullscreen', beginFn);\n      _this4.off('webkitendfullscreen', endFn);\n    });\n  };\n\n  /**\n   * Check if fullscreen is supported on the current playback device.\n   *\n   * @return {boolean}\n   *         - True if fullscreen is supported.\n   *         - False if fullscreen is not supported.\n   */\n\n\n  Html5.prototype.supportsFullScreen = function supportsFullScreen() {\n    if (typeof this.el_.webkitEnterFullScreen === 'function') {\n      var userAgent = window.navigator && window.navigator.userAgent || '';\n\n      // Seems to be broken in Chromium/Chrome && Safari in Leopard\n      if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * Request that the `HTML5` Tech enter fullscreen.\n   */\n\n\n  Html5.prototype.enterFullScreen = function enterFullScreen() {\n    var video = this.el_;\n\n    if (video.paused && video.networkState <= video.HAVE_METADATA) {\n      // attempt to prime the video element for programmatic access\n      // this isn't necessary on the desktop but shouldn't hurt\n      this.el_.play();\n\n      // playing and pausing synchronously during the transition to fullscreen\n      // can get iOS ~6.1 devices into a play/pause loop\n      this.setTimeout(function () {\n        video.pause();\n        video.webkitEnterFullScreen();\n      }, 0);\n    } else {\n      video.webkitEnterFullScreen();\n    }\n  };\n\n  /**\n   * Request that the `HTML5` Tech exit fullscreen.\n   */\n\n\n  Html5.prototype.exitFullScreen = function exitFullScreen() {\n    this.el_.webkitExitFullScreen();\n  };\n\n  /**\n   * A getter/setter for the `Html5` Tech's source object.\n   * > Note: Please use {@link Html5#setSource}\n   *\n   * @param {Tech~SourceObject} [src]\n   *        The source object you want to set on the `HTML5` techs element.\n   *\n   * @return {Tech~SourceObject|undefined}\n   *         - The current source object when a source is not passed in.\n   *         - undefined when setting\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  Html5.prototype.src = function src(_src) {\n    if (_src === undefined) {\n      return this.el_.src;\n    }\n\n    // Setting src through `src` instead of `setSrc` will be deprecated\n    this.setSrc(_src);\n  };\n\n  /**\n   * Reset the tech by removing all sources and then calling\n   * {@link Html5.resetMediaElement}.\n   */\n\n\n  Html5.prototype.reset = function reset() {\n    Html5.resetMediaElement(this.el_);\n  };\n\n  /**\n   * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n   * the HTML5 media element.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object from the HTML5 tech. With a fallback to the\n   *         elements source.\n   */\n\n\n  Html5.prototype.currentSrc = function currentSrc() {\n    if (this.currentSource_) {\n      return this.currentSource_.src;\n    }\n    return this.el_.currentSrc;\n  };\n\n  /**\n   * Set controls attribute for the HTML5 media Element.\n   *\n   * @param {string} val\n   *        Value to set the controls attribute to\n   */\n\n\n  Html5.prototype.setControls = function setControls(val) {\n    this.el_.controls = !!val;\n  };\n\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n\n\n  Html5.prototype.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.addTextTrack.call(this, kind, label, language);\n    }\n\n    return this.el_.addTextTrack(kind, label, language);\n  };\n\n  /**\n   * Creates either native TextTrack or an emulated TextTrack depending\n   * on the value of `featuresNativeTextTracks`\n   *\n   * @param {Object} options\n   *        The object should contain the options to intialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @param {boolean} [options.default]\n   *        Default this track to on.\n   *\n   * @param {string} [options.id]\n   *        The internal id to assign this track.\n   *\n   * @param {string} [options.src]\n   *        A source url for the track.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n\n\n  Html5.prototype.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.createRemoteTextTrack.call(this, options);\n    }\n    var htmlTrackElement = document.createElement('track');\n\n    if (options.kind) {\n      htmlTrackElement.kind = options.kind;\n    }\n    if (options.label) {\n      htmlTrackElement.label = options.label;\n    }\n    if (options.language || options.srclang) {\n      htmlTrackElement.srclang = options.language || options.srclang;\n    }\n    if (options['default']) {\n      htmlTrackElement['default'] = options['default'];\n    }\n    if (options.id) {\n      htmlTrackElement.id = options.id;\n    }\n    if (options.src) {\n      htmlTrackElement.src = options.src;\n    }\n\n    return htmlTrackElement;\n  };\n\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * @param {Object} options The object should contain values for\n   * kind, language, label, and src (location of the WebVTT file)\n   * @param {Boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   * automatically removed from the video element whenever the source changes\n   * @return {HTMLTrackElement} An Html Track Element.\n   * This can be an emulated {@link HTMLTrackElement} or a native one.\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   * to \"false\" in upcoming versions of Video.js\n   */\n\n\n  Html5.prototype.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);\n\n    if (this.featuresNativeTextTracks) {\n      this.el().appendChild(htmlTrackElement);\n    }\n\n    return htmlTrackElement;\n  };\n\n  /**\n   * Remove remote `TextTrack` from `TextTrackList` object\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` object to remove\n   */\n\n\n  Html5.prototype.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    _Tech.prototype.removeRemoteTextTrack.call(this, track);\n\n    if (this.featuresNativeTextTracks) {\n      var tracks = this.$$('track');\n\n      var i = tracks.length;\n\n      while (i--) {\n        if (track === tracks[i] || track === tracks[i].track) {\n          this.el().removeChild(tracks[i]);\n        }\n      }\n    }\n  };\n\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   */\n\n\n  Html5.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    if (typeof this.el().getVideoPlaybackQuality === 'function') {\n      return this.el().getVideoPlaybackQuality();\n    }\n\n    var videoPlaybackQuality = {};\n\n    if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n      videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n      videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n    }\n\n    if (window.performance && typeof window.performance.now === 'function') {\n      videoPlaybackQuality.creationTime = window.performance.now();\n    } else if (window.performance && window.performance.timing && typeof window.performance.timing.navigationStart === 'number') {\n      videoPlaybackQuality.creationTime = window.Date.now() - window.performance.timing.navigationStart;\n    }\n\n    return videoPlaybackQuality;\n  };\n\n  return Html5;\n}(Tech);\n\n/* HTML5 Support Testing ---------------------------------------------------- */\n\nif (isReal()) {\n\n  /**\n   * Element for testing browser HTML5 media capabilities\n   *\n   * @type {Element}\n   * @constant\n   * @private\n   */\n  Html5.TEST_VID = document.createElement('video');\n  var track = document.createElement('track');\n\n  track.kind = 'captions';\n  track.srclang = 'en';\n  track.label = 'English';\n  Html5.TEST_VID.appendChild(track);\n}\n\n/**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n *         - True if HTML5 media is supported.\n *         - False if HTML5 media is not supported.\n */\nHtml5.isSupported = function () {\n  // IE9 with no Media Player is a LIAR! (#984)\n  try {\n    Html5.TEST_VID.volume = 0.5;\n  } catch (e) {\n    return false;\n  }\n\n  return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n};\n\n/**\n * Check if the tech can support the given type\n *\n * @param {string} type\n *        The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\nHtml5.canPlayType = function (type) {\n  return Html5.TEST_VID.canPlayType(type);\n};\n\n/**\n * Check if the tech can support the given source\n * @param {Object} srcObj\n *        The source object\n * @param {Object} options\n *        The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\nHtml5.canPlaySource = function (srcObj, options) {\n  return Html5.canPlayType(srcObj.type);\n};\n\n/**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n *         - True if volume can be controlled\n *         - False otherwise\n */\nHtml5.canControlVolume = function () {\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var volume = Html5.TEST_VID.volume;\n\n    Html5.TEST_VID.volume = volume / 2 + 0.1;\n    return volume !== Html5.TEST_VID.volume;\n  } catch (e) {\n    return false;\n  }\n};\n\n/**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {bolean}\n *      - True if volume can be muted\n *      - False otherwise\n */\nHtml5.canMuteVolume = function () {\n  try {\n    var muted = Html5.TEST_VID.muted;\n\n    // in some versions of iOS muted property doesn't always\n    // work, so we want to set both property and attribute\n    Html5.TEST_VID.muted = !muted;\n    if (Html5.TEST_VID.muted) {\n      setAttribute(Html5.TEST_VID, 'muted', 'muted');\n    } else {\n      removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n    }\n    return muted !== Html5.TEST_VID.muted;\n  } catch (e) {\n    return false;\n  }\n};\n\n/**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n *         - True if playback rate can be controlled\n *         - False otherwise\n */\nHtml5.canControlPlaybackRate = function () {\n  // Playback rate API is implemented in Android Chrome, but doesn't do anything\n  // https://github.com/videojs/video.js/issues/3180\n  if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n    return false;\n  }\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var playbackRate = Html5.TEST_VID.playbackRate;\n\n    Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n    return playbackRate !== Html5.TEST_VID.playbackRate;\n  } catch (e) {\n    return false;\n  }\n};\n\n/**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n *         - True if builtin attributes can be overriden\n *         - False otherwise\n */\nHtml5.canOverrideAttributes = function () {\n  if (IS_IE8) {\n    return false;\n  }\n  // if we cannot overwrite the src/innerHTML property, there is no support\n  // iOS 7 safari for instance cannot do this.\n  try {\n    var noop = function noop() {};\n\n    Object.defineProperty(document.createElement('video'), 'src', { get: noop, set: noop });\n    Object.defineProperty(document.createElement('audio'), 'src', { get: noop, set: noop });\n    Object.defineProperty(document.createElement('video'), 'innerHTML', { get: noop, set: noop });\n    Object.defineProperty(document.createElement('audio'), 'innerHTML', { get: noop, set: noop });\n  } catch (e) {\n    return false;\n  }\n\n  return true;\n};\n\n/**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n *         - True if native `TextTrack`s are supported.\n *         - False otherwise\n */\nHtml5.supportsNativeTextTracks = function () {\n  return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n};\n\n/**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `VideoTrack`s are supported.\n *        - False otherwise\n */\nHtml5.supportsNativeVideoTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n};\n\n/**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `AudioTrack`s are supported.\n *        - False otherwise\n */\nHtml5.supportsNativeAudioTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n};\n\n/**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\nHtml5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\nHtml5.prototype.featuresVolumeControl = Html5.canControlVolume();\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default {@link Html5.canMuteVolume}\n */\nHtml5.prototype.featuresMuteControl = Html5.canMuteVolume();\n\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\nHtml5.prototype.featuresPlaybackRate = Html5.canControlPlaybackRate();\n\n/**\n * Boolean indicating wether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.featuresSourceset = Html5.canOverrideAttributes();\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.movingMediaElementInDOM = !IS_IOS;\n\n// TODO: Previous comment: No longer appears to be used. Can probably be removed.\n//       Is this true?\n/**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.featuresFullscreenResize = true;\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggred instead.\n *\n * @type {boolean}\n * @default\n */\nHtml5.prototype.featuresProgressEvents = true;\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggred instead.\n *\n * @default\n */\nHtml5.prototype.featuresTimeupdateEvents = true;\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\nHtml5.prototype.featuresNativeTextTracks = Html5.supportsNativeTextTracks();\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\nHtml5.prototype.featuresNativeVideoTracks = Html5.supportsNativeVideoTracks();\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\nHtml5.prototype.featuresNativeAudioTracks = Html5.supportsNativeAudioTracks();\n\n// HTML5 Feature detection and Device Fixes --------------------------------- //\nvar canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;\nvar mpegurlRE = /^application\\/(?:x-|vnd\\.apple\\.)mpegurl/i;\nvar mp4RE = /^video\\/mp4/i;\n\nHtml5.patchCanPlayType = function () {\n\n  // Android 4.0 and above can play HLS to some extent but it reports being unable to do so\n  // Firefox and Chrome report correctly\n  if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      if (type && mpegurlRE.test(type)) {\n        return 'maybe';\n      }\n      return canPlayType.call(this, type);\n    };\n\n    // Override Android 2.2 and less canPlayType method which is broken\n  } else if (IS_OLD_ANDROID) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      if (type && mp4RE.test(type)) {\n        return 'maybe';\n      }\n      return canPlayType.call(this, type);\n    };\n  }\n};\n\nHtml5.unpatchCanPlayType = function () {\n  var r = Html5.TEST_VID.constructor.prototype.canPlayType;\n\n  Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;\n  return r;\n};\n\n// by default, patch the media element\nHtml5.patchCanPlayType();\n\nHtml5.disposeMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  if (el.parentNode) {\n    el.parentNode.removeChild(el);\n  }\n\n  // remove any child track or source nodes to prevent their loading\n  while (el.hasChildNodes()) {\n    el.removeChild(el.firstChild);\n  }\n\n  // remove any src reference. not setting `src=''` because that causes a warning\n  // in firefox\n  el.removeAttribute('src');\n\n  // force the media element to update its loading state by calling load()\n  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {\n        // not supported\n      }\n    })();\n  }\n};\n\nHtml5.resetMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  var sources = el.querySelectorAll('source');\n  var i = sources.length;\n\n  while (i--) {\n    el.removeChild(sources[i]);\n  }\n\n  // remove any src reference.\n  // not setting `src=''` because that throws an error\n  el.removeAttribute('src');\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {\n        // satisfy linter\n      }\n    })();\n  }\n};\n\n/* Native HTML5 element property wrapping ----------------------------------- */\n// Wrap native boolean attributes with getters that check both property and attribute\n// The list is as followed:\n// muted, defaultMuted, autoplay, controls, loop, playsinline\n[\n/**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n *         - True if the value of `volume` should be ignored and the audio set to silent.\n *         - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n\n/**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n *         - The value of `defaultMuted` from the media element.\n *         - True indicates that the media should start muted.\n *         - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n\n/**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n *         - The value of `autoplay` from the media element.\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n\n/**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n *         - The value of `controls` from the media element.\n *         - True indicates that native controls should be showing.\n *         - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n'controls',\n\n/**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n *         - The value of `loop` from the media element.\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n\n/**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n *         - The value of `playsinline` from the media element.\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop] || this.el_.hasAttribute(prop);\n  };\n});\n\n// Wrap native boolean attributes with setters that set both property and attribute\n// The list is as followed:\n// setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n// setControls is special-cased above\n[\n/**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n\n/**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on intial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n\n/**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n\n/**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n\n/**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase(prop)] = function (v) {\n    this.el_[prop] = v;\n\n    if (v) {\n      this.el_.setAttribute(prop, prop);\n    } else {\n      this.el_.removeAttribute(prop);\n    }\n  };\n});\n\n// Wrap native properties with a getter\n// The list is as followed\n// paused, currentTime, buffered, volume, poster, preload, error, seeking\n// seekable, ended, playbackRate, defaultPlaybackRate, played, networkState\n// readyState, videoWidth, videoHeight\n[\n/**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n *         The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n'paused',\n\n/**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n *         The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n'currentTime',\n\n/**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n *         The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n'buffered',\n\n/**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n *         The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n\n/**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n *         The value of `poster` from the media element. Value will be a url to an\n *         image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n'poster',\n\n/**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#preload\n * @return {string}\n *         The value of `preload` from the media element. Will be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n\n/**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occured during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n *         The value of `error` from the media element. Will be `MediaError` if there\n *         is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n'error',\n\n/**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n *         - The value of `seeking` from the media element.\n *         - True indicates that the media is currently seeking to a new position.\n *         - Flase indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n'seeking',\n\n/**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n *         The value of `seekable` from the media element. A `TimeRange` object\n *         indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n'seekable',\n\n/**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n *         - The value of `ended` from the media element.\n *         - True indicates that the media has ended.\n *         - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n'ended',\n\n/**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n\n/**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n *   - if defaultPlaybackRate is set to 2, media will play twice as fast.\n *   - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'defaultPlaybackRate',\n\n/**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n *         The value of `played` from the media element. A `TimeRange` object indicating\n *         the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n'played',\n\n/**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NEWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n *         The value of `networkState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n'networkState',\n\n/**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n *         The value of `readyState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n'readyState',\n\n/**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n *         The value of `videoWidth` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoWidth',\n\n/**\n * Get the value of `videoHeight` from the video element. `videoHeigth` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n *         The value of `videoHeight` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoHeight'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop];\n  };\n});\n\n// Wrap native properties with a setter in this format:\n// set + toTitleCase(name)\n// The list is as follows:\n// setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate\n[\n/**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n *        The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n\n/**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n *        The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n'src',\n\n/**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n *        The url to an image that should be used as the `poster` for the media\n *        element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n'poster',\n\n/**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n *         The value of `preload` to set on the media element. Must be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n\n/**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n\n/**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n'defaultPlaybackRate'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase(prop)] = function (v) {\n    this.el_[prop] = v;\n  };\n});\n\n// wrap native functions with a function\n// The list is as follows:\n// pause, load play\n[\n/**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n'pause',\n\n/**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n'load',\n\n/**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n'play'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop]();\n  };\n});\n\nTech.withSourceHandlers(Html5);\n\n/**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @proprety {Tech~SourceObject} source\n *        The source object\n *\n * @proprety {Html5} tech\n *        The instance of the HTML5 tech.\n */\nHtml5.nativeSourceHandler = {};\n\n/**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n *        The mimetype to check\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string)\n */\nHtml5.nativeSourceHandler.canPlayType = function (type) {\n  // IE9 on Windows 7 without MediaPlayer throws an error here\n  // https://github.com/videojs/video.js/issues/519\n  try {\n    return Html5.TEST_VID.canPlayType(type);\n  } catch (e) {\n    return '';\n  }\n};\n\n/**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n *         The source object\n *\n * @param {Object} [options]\n *         Options to be passed to the tech.\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string).\n */\nHtml5.nativeSourceHandler.canHandleSource = function (source, options) {\n\n  // If a type was provided we should rely on that\n  if (source.type) {\n    return Html5.nativeSourceHandler.canPlayType(source.type);\n\n    // If no type, fall back to checking 'video/[EXTENSION]'\n  } else if (source.src) {\n    var ext = getFileExtension(source.src);\n\n    return Html5.nativeSourceHandler.canPlayType('video/' + ext);\n  }\n\n  return '';\n};\n\n/**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n *        The source object\n *\n * @param {Html5} tech\n *        The instance of the Html5 tech\n *\n * @param {Object} [options]\n *        The options to pass to the source\n */\nHtml5.nativeSourceHandler.handleSource = function (source, tech, options) {\n  tech.setSrc(source.src);\n};\n\n/**\n * A noop for the native dispose function, as cleanup is not needed.\n */\nHtml5.nativeSourceHandler.dispose = function () {};\n\n// Register the native source handler\nHtml5.registerSourceHandler(Html5.nativeSourceHandler);\n\nTech.registerTech('Html5', Html5);\n\nvar _templateObject$1 = taggedTemplateLiteralLoose(['\\n        Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n        See https://github.com/videojs/video.js/issues/2617 for more info.\\n      '], ['\\n        Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n        See https://github.com/videojs/video.js/issues/2617 for more info.\\n      ']);\n\n/**\n * @file player.js\n */\n// Subclasses Component\n// The following imports are used only to ensure that the corresponding modules\n// are always included in the video.js package. Importing the modules will\n// execute them and they will register themselves with video.js.\n// Import Html5 tech, at least for disposing the original video tag.\n// The following tech events are simply re-triggered\n// on the player when they happen\nvar TECH_EVENTS_RETRIGGER = [\n/**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n'progress',\n\n/**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n'abort',\n\n/**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n'suspend',\n\n/**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n'emptied',\n/**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n'stalled',\n\n/**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n'loadedmetadata',\n\n/**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n/**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n'loadeddata',\n\n/**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n/**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n'timeupdate',\n\n/**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n/**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n'resize',\n\n/**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n/**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n'volumechange',\n\n/**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n/**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n'texttrackchange'];\n\n// events to queue when playback rate is zero\n// this is a hash for the sole purpose of mapping non-camel-cased event names\n// to camel-cased function names\nvar TECH_EVENTS_QUEUE = {\n  canplay: 'CanPlay',\n  canplaythrough: 'CanPlayThrough',\n  playing: 'Playing',\n  seeked: 'Seeked'\n};\n\nvar BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\n\nvar BREAKPOINT_CLASSES = {};\n\n// grep: vjs-layout-tiny\n// grep: vjs-layout-x-small\n// grep: vjs-layout-small\n// grep: vjs-layout-medium\n// grep: vjs-layout-large\n// grep: vjs-layout-x-large\n// grep: vjs-layout-huge\nBREAKPOINT_ORDER.forEach(function (k) {\n  var v = k.charAt(0) === 'x' ? 'x-' + k.substring(1) : k;\n\n  BREAKPOINT_CLASSES[k] = 'vjs-layout-' + v;\n});\n\nvar DEFAULT_BREAKPOINTS = {\n  tiny: 210,\n  xsmall: 320,\n  small: 425,\n  medium: 768,\n  large: 1440,\n  xlarge: 2560,\n  huge: Infinity\n};\n\n/**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in two ways:\n * 1. By calling `videojs('example_video_1');`\n * 2. By using it directly via  `videojs.players.example_video_1;`\n *\n * @extends Component\n */\n\nvar Player = function (_Component) {\n  inherits(Player, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Element} tag\n   *        The original video DOM element used for configuring options.\n   *\n   * @param {Object} [options]\n   *        Object of option names and values.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Ready callback function.\n   */\n  function Player(tag, options, ready) {\n    classCallCheck(this, Player);\n\n    // Make sure tag ID exists\n    tag.id = tag.id || options.id || 'vjs_video_' + newGUID();\n\n    // Set Options\n    // The options argument overrides options set in the video tag\n    // which overrides globally set options.\n    // This latter part coincides with the load order\n    // (tag must exist before Player)\n    options = assign(Player.getTagSettings(tag), options);\n\n    // Delay the initialization of children because we need to set up\n    // player properties first, and can't use `this` before `super()`\n    options.initChildren = false;\n\n    // Same with creating the element\n    options.createEl = false;\n\n    // don't auto mixin the evented mixin\n    options.evented = false;\n\n    // we don't want the player to report touch activity on itself\n    // see enableTouchActivity in Component\n    options.reportTouchActivity = false;\n\n    // If language is not set, get the closest lang attribute\n    if (!options.language) {\n      if (typeof tag.closest === 'function') {\n        var closest = tag.closest('[lang]');\n\n        if (closest && closest.getAttribute) {\n          options.language = closest.getAttribute('lang');\n        }\n      } else {\n        var element = tag;\n\n        while (element && element.nodeType === 1) {\n          if (getAttributes(element).hasOwnProperty('lang')) {\n            options.language = element.getAttribute('lang');\n            break;\n          }\n          element = element.parentNode;\n        }\n      }\n    }\n\n    // Run base component initializing with new options\n\n    // create logger\n    var _this = possibleConstructorReturn(this, _Component.call(this, null, options, ready));\n\n    _this.log = createLogger(_this.id_);\n\n    // Tracks when a tech changes the poster\n    _this.isPosterFromTech_ = false;\n\n    // Holds callback info that gets queued when playback rate is zero\n    // and a seek is happening\n    _this.queuedCallbacks_ = [];\n\n    // Turn off API access because we're loading a new tech that might load asynchronously\n    _this.isReady_ = false;\n\n    // Init state hasStarted_\n    _this.hasStarted_ = false;\n\n    // Init state userActive_\n    _this.userActive_ = false;\n\n    // if the global option object was accidentally blown away by\n    // someone, bail early with an informative error\n    if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {\n      throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n    }\n\n    // Store the original tag used to set options\n    _this.tag = tag;\n\n    // Store the tag attributes used to restore html5 element\n    _this.tagAttributes = tag && getAttributes(tag);\n\n    // Update current language\n    _this.language(_this.options_.language);\n\n    // Update Supported Languages\n    if (options.languages) {\n      // Normalise player option languages to lowercase\n      var languagesToLower = {};\n\n      Object.getOwnPropertyNames(options.languages).forEach(function (name$$1) {\n        languagesToLower[name$$1.toLowerCase()] = options.languages[name$$1];\n      });\n      _this.languages_ = languagesToLower;\n    } else {\n      _this.languages_ = Player.prototype.options_.languages;\n    }\n\n    // Cache for video property values.\n    _this.cache_ = {};\n\n    // Set poster\n    _this.poster_ = options.poster || '';\n\n    // Set controls\n    _this.controls_ = !!options.controls;\n\n    // Set default values for lastVolume\n    _this.cache_.lastVolume = 1;\n\n    // Original tag settings stored in options\n    // now remove immediately so native controls don't flash.\n    // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n    tag.controls = false;\n    tag.removeAttribute('controls');\n\n    // the attribute overrides the option\n    if (tag.hasAttribute('autoplay')) {\n      _this.options_.autoplay = true;\n    } else {\n      // otherwise use the setter to validate and\n      // set the correct value.\n      _this.autoplay(_this.options_.autoplay);\n    }\n\n    /*\n     * Store the internal state of scrubbing\n     *\n     * @private\n     * @return {Boolean} True if the user is scrubbing\n     */\n    _this.scrubbing_ = false;\n\n    _this.el_ = _this.createEl();\n\n    // Set default value for lastPlaybackRate\n    _this.cache_.lastPlaybackRate = _this.defaultPlaybackRate();\n\n    // Make this an evented object and use `el_` as its event bus.\n    evented(_this, { eventBusKey: 'el_' });\n\n    // We also want to pass the original player options to each component and plugin\n    // as well so they don't need to reach back into the player for options later.\n    // We also need to do another copy of this.options_ so we don't end up with\n    // an infinite loop.\n    var playerOptionsCopy = mergeOptions(_this.options_);\n\n    // Load plugins\n    if (options.plugins) {\n      var plugins = options.plugins;\n\n      Object.keys(plugins).forEach(function (name$$1) {\n        if (typeof this[name$$1] === 'function') {\n          this[name$$1](plugins[name$$1]);\n        } else {\n          throw new Error('plugin \"' + name$$1 + '\" does not exist');\n        }\n      }, _this);\n    }\n\n    _this.options_.playerOptions = playerOptionsCopy;\n\n    _this.middleware_ = [];\n\n    _this.initChildren();\n\n    // Set isAudio based on whether or not an audio tag was used\n    _this.isAudio(tag.nodeName.toLowerCase() === 'audio');\n\n    // Update controls className. Can't do this when the controls are initially\n    // set because the element doesn't exist yet.\n    if (_this.controls()) {\n      _this.addClass('vjs-controls-enabled');\n    } else {\n      _this.addClass('vjs-controls-disabled');\n    }\n\n    // Set ARIA label and region role depending on player type\n    _this.el_.setAttribute('role', 'region');\n    if (_this.isAudio()) {\n      _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));\n    } else {\n      _this.el_.setAttribute('aria-label', _this.localize('Video Player'));\n    }\n\n    if (_this.isAudio()) {\n      _this.addClass('vjs-audio');\n    }\n\n    if (_this.flexNotSupported_()) {\n      _this.addClass('vjs-no-flex');\n    }\n\n    // TODO: Make this smarter. Toggle user state between touching/mousing\n    // using events, since devices can have both touch and mouse events.\n    // if (browser.TOUCH_ENABLED) {\n    //   this.addClass('vjs-touch-enabled');\n    // }\n\n    // iOS Safari has broken hover handling\n    if (!IS_IOS) {\n      _this.addClass('vjs-workinghover');\n    }\n\n    // Make player easily findable by ID\n    Player.players[_this.id_] = _this;\n\n    // Add a major version class to aid css in plugins\n    var majorVersion = version.split('.')[0];\n\n    _this.addClass('vjs-v' + majorVersion);\n\n    // When the player is first initialized, trigger activity so components\n    // like the control bar show themselves if needed\n    _this.userActive(true);\n    _this.reportUserActivity();\n\n    _this.one('play', _this.listenForUserActivity_);\n    _this.on('fullscreenchange', _this.handleFullscreenChange_);\n    _this.on('stageclick', _this.handleStageClick_);\n\n    _this.breakpoints(_this.options_.breakpoints);\n    _this.responsive(_this.options_.responsive);\n\n    _this.changingSrc_ = false;\n    _this.playWaitingForReady_ = false;\n    _this.playOnLoadstart_ = null;\n    return _this;\n  }\n\n  /**\n   * Destroys the video player and does any necessary cleanup.\n   *\n   * This is especially helpful if you are dynamically adding and removing videos\n   * to/from the DOM.\n   *\n   * @fires Player#dispose\n   */\n\n\n  Player.prototype.dispose = function dispose() {\n    /**\n     * Called when the player is being disposed of.\n     *\n     * @event Player#dispose\n     * @type {EventTarget~Event}\n     */\n    this.trigger('dispose');\n    // prevent dispose from being called twice\n    this.off('dispose');\n\n    if (this.styleEl_ && this.styleEl_.parentNode) {\n      this.styleEl_.parentNode.removeChild(this.styleEl_);\n      this.styleEl_ = null;\n    }\n\n    // Kill reference to this player\n    Player.players[this.id_] = null;\n\n    if (this.tag && this.tag.player) {\n      this.tag.player = null;\n    }\n\n    if (this.el_ && this.el_.player) {\n      this.el_.player = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.dispose();\n      this.isPosterFromTech_ = false;\n      this.poster_ = '';\n    }\n\n    if (this.playerElIngest_) {\n      this.playerElIngest_ = null;\n    }\n\n    if (this.tag) {\n      this.tag = null;\n    }\n\n    clearCacheForPlayer(this);\n\n    // the actual .el_ is removed here\n    _Component.prototype.dispose.call(this);\n  };\n\n  /**\n   * Create the `Player`'s DOM element.\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  Player.prototype.createEl = function createEl$$1() {\n    var tag = this.tag;\n    var el = void 0;\n    var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n    var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n\n    if (playerElIngest) {\n      el = this.el_ = tag.parentNode;\n    } else if (!divEmbed) {\n      el = this.el_ = _Component.prototype.createEl.call(this, 'div');\n    }\n\n    // Copy over all the attributes from the tag, including ID and class\n    // ID will now reference player box, not the video tag\n    var attrs = getAttributes(tag);\n\n    if (divEmbed) {\n      el = this.el_ = tag;\n      tag = this.tag = document.createElement('video');\n      while (el.children.length) {\n        tag.appendChild(el.firstChild);\n      }\n\n      if (!hasClass(el, 'video-js')) {\n        addClass(el, 'video-js');\n      }\n\n      el.appendChild(tag);\n\n      playerElIngest = this.playerElIngest_ = el;\n\n      // copy over properties from the video-js element\n      // ie8 doesn't support Object.keys nor hasOwnProperty\n      // on dom elements so we have to specify properties individually\n      ['autoplay', 'controls', 'crossOrigin', 'defaultMuted', 'defaultPlaybackRate', 'loop', 'muted', 'playbackRate', 'src', 'volume'].forEach(function (prop) {\n        if (typeof el[prop] !== 'undefined') {\n          tag[prop] = el[prop];\n        }\n      });\n    }\n\n    // set tabindex to -1 to remove the video element from the focus order\n    tag.setAttribute('tabindex', '-1');\n    attrs.tabindex = '-1';\n\n    // Workaround for #4583 (JAWS+IE doesn't announce BPB or play button)\n    // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n    // Note that we can't detect if JAWS is being used, but this ARIA attribute\n    //  doesn't change behavior of IE11 if JAWS is not being used\n    if (IE_VERSION) {\n      tag.setAttribute('role', 'application');\n      attrs.role = 'application';\n    }\n\n    // Remove width/height attrs from tag so CSS can make it 100% width/height\n    tag.removeAttribute('width');\n    tag.removeAttribute('height');\n\n    if ('width' in attrs) {\n      delete attrs.width;\n    }\n    if ('height' in attrs) {\n      delete attrs.height;\n    }\n\n    Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n      // workaround so we don't totally break IE7\n      // http://stackoverflow.com/questions/3653444/css-styles-not-applied-on-dynamic-elements-in-internet-explorer-7\n      if (attr === 'class') {\n        el.className += ' ' + attrs[attr];\n\n        if (divEmbed) {\n          tag.className += ' ' + attrs[attr];\n        }\n      } else {\n        el.setAttribute(attr, attrs[attr]);\n\n        if (divEmbed) {\n          tag.setAttribute(attr, attrs[attr]);\n        }\n      }\n    });\n\n    // Update tag id/class for use as HTML5 playback tech\n    // Might think we should do this after embedding in container so .vjs-tech class\n    // doesn't flash 100% width/height, but class only applies with .video-js parent\n    tag.playerId = tag.id;\n    tag.id += '_html5_api';\n    tag.className = 'vjs-tech';\n\n    // Make player findable on elements\n    tag.player = el.player = this;\n    // Default state of video is paused\n    this.addClass('vjs-paused');\n\n    // Add a style element in the player that we'll use to set the width/height\n    // of the player in a way that's still overrideable by CSS, just like the\n    // video element\n    if (window.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n      this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n      var defaultsStyleEl = $('.vjs-styles-defaults');\n      var head = $('head');\n\n      head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n    }\n\n    this.fill_ = false;\n    this.fluid_ = false;\n\n    // Pass in the width/height/aspectRatio options which will update the style el\n    this.width(this.options_.width);\n    this.height(this.options_.height);\n    this.fill(this.options_.fill);\n    this.fluid(this.options_.fluid);\n    this.aspectRatio(this.options_.aspectRatio);\n\n    // Hide any links within the video/audio tag, because IE doesn't hide them completely.\n    var links = tag.getElementsByTagName('a');\n\n    for (var i = 0; i < links.length; i++) {\n      var linkEl = links.item(i);\n\n      addClass(linkEl, 'vjs-hidden');\n      linkEl.setAttribute('hidden', 'hidden');\n    }\n\n    // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n    // keep track of the original for later so we can know if the source originally failed\n    tag.initNetworkState_ = tag.networkState;\n\n    // Wrap video tag in div (el/box) container\n    if (tag.parentNode && !playerElIngest) {\n      tag.parentNode.insertBefore(el, tag);\n    }\n\n    // insert the tag as the first child of the player element\n    // then manually add it to the children array so that this.addChild\n    // will work properly for other components\n    //\n    // Breaks iPhone, fixed in HTML5 setup.\n    prependTo(tag, el);\n    this.children_.unshift(tag);\n\n    // Set lang attr on player to ensure CSS :lang() in consistent with player\n    // if it's been set to something different to the doc\n    this.el_.setAttribute('lang', this.language_);\n\n    this.el_ = el;\n\n    return el;\n  };\n\n  /**\n   * A getter/setter for the `Player`'s width. Returns the player's configured value.\n   * To get the current width use `currentWidth()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s width to.\n   *\n   * @return {number}\n   *         The current width of the `Player` when getting.\n   */\n\n\n  Player.prototype.width = function width(value) {\n    return this.dimension('width', value);\n  };\n\n  /**\n   * A getter/setter for the `Player`'s height. Returns the player's configured value.\n   * To get the current height use `currentheight()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s heigth to.\n   *\n   * @return {number}\n   *         The current height of the `Player` when getting.\n   */\n\n\n  Player.prototype.height = function height(value) {\n    return this.dimension('height', value);\n  };\n\n  /**\n   * A getter/setter for the `Player`'s width & height.\n   *\n   * @param {string} dimension\n   *        This string can be:\n   *        - 'width'\n   *        - 'height'\n   *\n   * @param {number} [value]\n   *        Value for dimension specified in the first argument.\n   *\n   * @return {number}\n   *         The dimension arguments value when getting (width/height).\n   */\n\n\n  Player.prototype.dimension = function dimension(_dimension, value) {\n    var privDimension = _dimension + '_';\n\n    if (value === undefined) {\n      return this[privDimension] || 0;\n    }\n\n    if (value === '') {\n      // If an empty string is given, reset the dimension to be automatic\n      this[privDimension] = undefined;\n      this.updateStyleEl_();\n      return;\n    }\n\n    var parsedVal = parseFloat(value);\n\n    if (isNaN(parsedVal)) {\n      log.error('Improper value \"' + value + '\" supplied for for ' + _dimension);\n      return;\n    }\n\n    this[privDimension] = parsedVal;\n    this.updateStyleEl_();\n  };\n\n  /**\n   * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n   *\n   * Turning this on will turn off fill mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n\n\n  Player.prototype.fluid = function fluid(bool) {\n    if (bool === undefined) {\n      return !!this.fluid_;\n    }\n\n    this.fluid_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fluid');\n      this.fill(false);\n    } else {\n      this.removeClass('vjs-fluid');\n    }\n\n    this.updateStyleEl_();\n  };\n\n  /**\n   * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n   *\n   * Turning this on will turn off fluid mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n\n\n  Player.prototype.fill = function fill(bool) {\n    if (bool === undefined) {\n      return !!this.fill_;\n    }\n\n    this.fill_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fill');\n      this.fluid(false);\n    } else {\n      this.removeClass('vjs-fill');\n    }\n  };\n\n  /**\n   * Get/Set the aspect ratio\n   *\n   * @param {string} [ratio]\n   *        Aspect ratio for player\n   *\n   * @return {string|undefined}\n   *         returns the current aspect ratio when getting\n   */\n\n  /**\n   * A getter/setter for the `Player`'s aspect ratio.\n   *\n   * @param {string} [ratio]\n   *        The value to set the `Player's aspect ratio to.\n   *\n   * @return {string|undefined}\n   *         - The current aspect ratio of the `Player` when getting.\n   *         - undefined when setting\n   */\n\n\n  Player.prototype.aspectRatio = function aspectRatio(ratio) {\n    if (ratio === undefined) {\n      return this.aspectRatio_;\n    }\n\n    // Check for width:height format\n    if (!/^\\d+\\:\\d+$/.test(ratio)) {\n      throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n    }\n    this.aspectRatio_ = ratio;\n\n    // We're assuming if you set an aspect ratio you want fluid mode,\n    // because in fixed mode you could calculate width and height yourself.\n    this.fluid(true);\n\n    this.updateStyleEl_();\n  };\n\n  /**\n   * Update styles of the `Player` element (height, width and aspect ratio).\n   *\n   * @private\n   * @listens Tech#loadedmetadata\n   */\n\n\n  Player.prototype.updateStyleEl_ = function updateStyleEl_() {\n    if (window.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n      var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n      var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n      var techEl = this.tech_ && this.tech_.el();\n\n      if (techEl) {\n        if (_width >= 0) {\n          techEl.width = _width;\n        }\n        if (_height >= 0) {\n          techEl.height = _height;\n        }\n      }\n\n      return;\n    }\n\n    var width = void 0;\n    var height = void 0;\n    var aspectRatio = void 0;\n    var idClass = void 0;\n\n    // The aspect ratio is either used directly or to calculate width and height.\n    if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n      // Use any aspectRatio that's been specifically set\n      aspectRatio = this.aspectRatio_;\n    } else if (this.videoWidth() > 0) {\n      // Otherwise try to get the aspect ratio from the video metadata\n      aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n    } else {\n      // Or use a default. The video element's is 2:1, but 16:9 is more common.\n      aspectRatio = '16:9';\n    }\n\n    // Get the ratio as a decimal we can use to calculate dimensions\n    var ratioParts = aspectRatio.split(':');\n    var ratioMultiplier = ratioParts[1] / ratioParts[0];\n\n    if (this.width_ !== undefined) {\n      // Use any width that's been specifically set\n      width = this.width_;\n    } else if (this.height_ !== undefined) {\n      // Or calulate the width from the aspect ratio if a height has been set\n      width = this.height_ / ratioMultiplier;\n    } else {\n      // Or use the video's metadata, or use the video el's default of 300\n      width = this.videoWidth() || 300;\n    }\n\n    if (this.height_ !== undefined) {\n      // Use any height that's been specifically set\n      height = this.height_;\n    } else {\n      // Otherwise calculate the height from the ratio and the width\n      height = width * ratioMultiplier;\n    }\n\n    // Ensure the CSS class is valid by starting with an alpha character\n    if (/^[^a-zA-Z]/.test(this.id())) {\n      idClass = 'dimensions-' + this.id();\n    } else {\n      idClass = this.id() + '-dimensions';\n    }\n\n    // Ensure the right class is still on the player for the style element\n    this.addClass(idClass);\n\n    setTextContent(this.styleEl_, '\\n      .' + idClass + ' {\\n        width: ' + width + 'px;\\n        height: ' + height + 'px;\\n      }\\n\\n      .' + idClass + '.vjs-fluid {\\n        padding-top: ' + ratioMultiplier * 100 + '%;\\n      }\\n    ');\n  };\n\n  /**\n   * Load/Create an instance of playback {@link Tech} including element\n   * and API methods. Then append the `Tech` element in `Player` as a child.\n   *\n   * @param {string} techName\n   *        name of the playback technology\n   *\n   * @param {string} source\n   *        video source\n   *\n   * @private\n   */\n\n\n  Player.prototype.loadTech_ = function loadTech_(techName, source) {\n    var _this2 = this;\n\n    // Pause and remove current playback technology\n    if (this.tech_) {\n      this.unloadTech_();\n    }\n\n    var titleTechName = toTitleCase(techName);\n    var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1);\n\n    // get rid of the HTML5 video tag as soon as we are using another tech\n    if (titleTechName !== 'Html5' && this.tag) {\n      Tech.getTech('Html5').disposeMediaElement(this.tag);\n      this.tag.player = null;\n      this.tag = null;\n    }\n\n    this.techName_ = titleTechName;\n\n    // Turn off API access because we're loading a new tech that might load asynchronously\n    this.isReady_ = false;\n\n    // if autoplay is a string we pass false to the tech\n    // because the player is going to handle autoplay on `loadstart`\n    var autoplay = typeof this.autoplay() === 'string' ? false : this.autoplay();\n\n    // Grab tech-specific options from player options and add source and parent element to use.\n    var techOptions = {\n      source: source,\n      autoplay: autoplay,\n      'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n      'playerId': this.id(),\n      'techId': this.id() + '_' + camelTechName + '_api',\n      'playsinline': this.options_.playsinline,\n      'preload': this.options_.preload,\n      'loop': this.options_.loop,\n      'muted': this.options_.muted,\n      'poster': this.poster(),\n      'language': this.language(),\n      'playerElIngest': this.playerElIngest_ || false,\n      'vtt.js': this.options_['vtt.js'],\n      'canOverridePoster': !!this.options_.techCanOverridePoster,\n      'enableSourceset': this.options_.enableSourceset\n    };\n\n    ALL.names.forEach(function (name$$1) {\n      var props = ALL[name$$1];\n\n      techOptions[props.getterName] = _this2[props.privateName];\n    });\n\n    assign(techOptions, this.options_[titleTechName]);\n    assign(techOptions, this.options_[camelTechName]);\n    assign(techOptions, this.options_[techName.toLowerCase()]);\n\n    if (this.tag) {\n      techOptions.tag = this.tag;\n    }\n\n    if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n      techOptions.startTime = this.cache_.currentTime;\n    }\n\n    // Initialize tech instance\n    var TechClass = Tech.getTech(techName);\n\n    if (!TechClass) {\n      throw new Error('No Tech named \\'' + titleTechName + '\\' exists! \\'' + titleTechName + '\\' should be registered using videojs.registerTech()\\'');\n    }\n\n    this.tech_ = new TechClass(techOptions);\n\n    // player.triggerReady is always async, so don't need this to be async\n    this.tech_.ready(bind(this, this.handleTechReady_), true);\n\n    textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_);\n\n    // Listen to all HTML5-defined events and trigger them on the player\n    TECH_EVENTS_RETRIGGER.forEach(function (event) {\n      _this2.on(_this2.tech_, event, _this2['handleTech' + toTitleCase(event) + '_']);\n    });\n\n    Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {\n      _this2.on(_this2.tech_, event, function (eventObj) {\n        if (_this2.tech_.playbackRate() === 0 && _this2.tech_.seeking()) {\n          _this2.queuedCallbacks_.push({\n            callback: _this2['handleTech' + TECH_EVENTS_QUEUE[event] + '_'].bind(_this2),\n            event: eventObj\n          });\n          return;\n        }\n        _this2['handleTech' + TECH_EVENTS_QUEUE[event] + '_'](eventObj);\n      });\n    });\n\n    this.on(this.tech_, 'loadstart', this.handleTechLoadStart_);\n    this.on(this.tech_, 'sourceset', this.handleTechSourceset_);\n    this.on(this.tech_, 'waiting', this.handleTechWaiting_);\n    this.on(this.tech_, 'ended', this.handleTechEnded_);\n    this.on(this.tech_, 'seeking', this.handleTechSeeking_);\n    this.on(this.tech_, 'play', this.handleTechPlay_);\n    this.on(this.tech_, 'firstplay', this.handleTechFirstPlay_);\n    this.on(this.tech_, 'pause', this.handleTechPause_);\n    this.on(this.tech_, 'durationchange', this.handleTechDurationChange_);\n    this.on(this.tech_, 'fullscreenchange', this.handleTechFullscreenChange_);\n    this.on(this.tech_, 'error', this.handleTechError_);\n    this.on(this.tech_, 'loadedmetadata', this.updateStyleEl_);\n    this.on(this.tech_, 'posterchange', this.handleTechPosterChange_);\n    this.on(this.tech_, 'textdata', this.handleTechTextData_);\n    this.on(this.tech_, 'ratechange', this.handleTechRateChange_);\n\n    this.usingNativeControls(this.techGet_('controls'));\n\n    if (this.controls() && !this.usingNativeControls()) {\n      this.addTechControlsListeners_();\n    }\n\n    // Add the tech element in the DOM if it was not already there\n    // Make sure to not insert the original video element if using Html5\n    if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n      prependTo(this.tech_.el(), this.el());\n    }\n\n    // Get rid of the original video tag reference after the first tech is loaded\n    if (this.tag) {\n      this.tag.player = null;\n      this.tag = null;\n    }\n  };\n\n  /**\n   * Unload and dispose of the current playback {@link Tech}.\n   *\n   * @private\n   */\n\n\n  Player.prototype.unloadTech_ = function unloadTech_() {\n    var _this3 = this;\n\n    // Save the current text tracks so that we can reuse the same text tracks with the next tech\n    ALL.names.forEach(function (name$$1) {\n      var props = ALL[name$$1];\n\n      _this3[props.privateName] = _this3[props.getterName]();\n    });\n    this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n\n    this.isReady_ = false;\n\n    this.tech_.dispose();\n\n    this.tech_ = false;\n\n    if (this.isPosterFromTech_) {\n      this.poster_ = '';\n      this.trigger('posterchange');\n    }\n\n    this.isPosterFromTech_ = false;\n  };\n\n  /**\n   * Return a reference to the current {@link Tech}.\n   * It will print a warning by default about the danger of using the tech directly\n   * but any argument that is passed in will silence the warning.\n   *\n   * @param {*} [safety]\n   *        Anything passed in to silence the warning\n   *\n   * @return {Tech}\n   *         The Tech\n   */\n\n\n  Player.prototype.tech = function tech(safety) {\n    if (safety === undefined) {\n      log.warn(tsml(_templateObject$1));\n    }\n\n    return this.tech_;\n  };\n\n  /**\n   * Set up click and touch listeners for the playback element\n   *\n   * - On desktops: a click on the video itself will toggle playback\n   * - On mobile devices: a click on the video toggles controls\n   *   which is done by toggling the user state between active and\n   *   inactive\n   * - A tap can signal that a user has become active or has become inactive\n   *   e.g. a quick tap on an iPhone movie should reveal the controls. Another\n   *   quick tap should hide them again (signaling the user is in an inactive\n   *   viewing state)\n   * - In addition to this, we still want the user to be considered inactive after\n   *   a few seconds of inactivity.\n   *\n   * > Note: the only part of iOS interaction we can't mimic with this setup\n   * is a touch and hold on the video element counting as activity in order to\n   * keep the controls showing, but that shouldn't be an issue. A touch and hold\n   * on any controls will still keep the user active\n   *\n   * @private\n   */\n\n\n  Player.prototype.addTechControlsListeners_ = function addTechControlsListeners_() {\n    // Make sure to remove all the previous listeners in case we are called multiple times.\n    this.removeTechControlsListeners_();\n\n    // Some browsers (Chrome & IE) don't trigger a click on a flash swf, but do\n    // trigger mousedown/up.\n    // http://stackoverflow.com/questions/1444562/javascript-onclick-event-over-flash-object\n    // Any touch events are set to block the mousedown event from happening\n    this.on(this.tech_, 'mousedown', this.handleTechClick_);\n\n    // If the controls were hidden we don't want that to change without a tap event\n    // so we'll check if the controls were already showing before reporting user\n    // activity\n    this.on(this.tech_, 'touchstart', this.handleTechTouchStart_);\n    this.on(this.tech_, 'touchmove', this.handleTechTouchMove_);\n    this.on(this.tech_, 'touchend', this.handleTechTouchEnd_);\n\n    // The tap listener needs to come after the touchend listener because the tap\n    // listener cancels out any reportedUserActivity when setting userActive(false)\n    this.on(this.tech_, 'tap', this.handleTechTap_);\n  };\n\n  /**\n   * Remove the listeners used for click and tap controls. This is needed for\n   * toggling to controls disabled, where a tap/touch should do nothing.\n   *\n   * @private\n   */\n\n\n  Player.prototype.removeTechControlsListeners_ = function removeTechControlsListeners_() {\n    // We don't want to just use `this.off()` because there might be other needed\n    // listeners added by techs that extend this.\n    this.off(this.tech_, 'tap', this.handleTechTap_);\n    this.off(this.tech_, 'touchstart', this.handleTechTouchStart_);\n    this.off(this.tech_, 'touchmove', this.handleTechTouchMove_);\n    this.off(this.tech_, 'touchend', this.handleTechTouchEnd_);\n    this.off(this.tech_, 'mousedown', this.handleTechClick_);\n  };\n\n  /**\n   * Player waits for the tech to be ready\n   *\n   * @private\n   */\n\n\n  Player.prototype.handleTechReady_ = function handleTechReady_() {\n    this.triggerReady();\n\n    // Keep the same volume as before\n    if (this.cache_.volume) {\n      this.techCall_('setVolume', this.cache_.volume);\n    }\n\n    // Look if the tech found a higher resolution poster while loading\n    this.handleTechPosterChange_();\n\n    // Update the duration if available\n    this.handleTechDurationChange_();\n\n    // Chrome and Safari both have issues with autoplay.\n    // In Safari (5.1.1), when we move the video element into the container div, autoplay doesn't work.\n    // In Chrome (15), if you have autoplay + a poster + no controls, the video gets hidden (but audio plays)\n    // This fixes both issues. Need to wait for API, so it updates displays correctly\n    if ((this.src() || this.currentSrc()) && this.tag && this.options_.autoplay && this.paused()) {\n      try {\n        // Chrome Fix. Fixed in Chrome v16.\n        delete this.tag.poster;\n      } catch (e) {\n        log('deleting tag.poster throws in some browsers', e);\n      }\n    }\n  };\n\n  /**\n   * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This\n   * function will also trigger {@link Player#firstplay} if it is the first loadstart\n   * for a video.\n   *\n   * @fires Player#loadstart\n   * @fires Player#firstplay\n   * @listens Tech#loadstart\n   * @private\n   */\n\n\n  Player.prototype.handleTechLoadStart_ = function handleTechLoadStart_() {\n    // TODO: Update to use `emptied` event instead. See #1277.\n\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-seeking');\n\n    // reset the error state\n    this.error(null);\n\n    // If it's already playing we want to trigger a firstplay event now.\n    // The firstplay event relies on both the play and loadstart events\n    // which can happen in any order for a new source\n    if (!this.paused()) {\n      /**\n       * Fired when the user agent begins looking for media data\n       *\n       * @event Player#loadstart\n       * @type {EventTarget~Event}\n       */\n      this.trigger('loadstart');\n      this.trigger('firstplay');\n    } else {\n      // reset the hasStarted state\n      this.hasStarted(false);\n      this.trigger('loadstart');\n    }\n\n    // autoplay happens after loadstart for the browser,\n    // so we mimic that behavior\n    this.manualAutoplay_(this.autoplay());\n  };\n\n  /**\n   * Handle autoplay string values, rather than the typical boolean\n   * values that should be handled by the tech. Note that this is not\n   * part of any specification. Valid values and what they do can be\n   * found on the autoplay getter at Player#autoplay()\n   */\n\n\n  Player.prototype.manualAutoplay_ = function manualAutoplay_(type) {\n    var _this4 = this;\n\n    if (!this.tech_ || typeof type !== 'string') {\n      return;\n    }\n\n    var muted = function muted() {\n      var previouslyMuted = _this4.muted();\n\n      _this4.muted(true);\n\n      var playPromise = _this4.play();\n\n      if (!playPromise || !playPromise.then || !playPromise['catch']) {\n        return;\n      }\n\n      return playPromise['catch'](function (e) {\n        // restore old value of muted on failure\n        _this4.muted(previouslyMuted);\n      });\n    };\n\n    var promise = void 0;\n\n    if (type === 'any') {\n      promise = this.play();\n\n      if (promise && promise.then && promise['catch']) {\n        promise['catch'](function () {\n          return muted();\n        });\n      }\n    } else if (type === 'muted') {\n      promise = muted();\n    } else {\n      promise = this.play();\n    }\n\n    if (!promise || !promise.then || !promise['catch']) {\n      return;\n    }\n\n    return promise.then(function () {\n      _this4.trigger({ type: 'autoplay-success', autoplay: type });\n    })['catch'](function (e) {\n      _this4.trigger({ type: 'autoplay-failure', autoplay: type });\n    });\n  };\n\n  /**\n   * Update the internal source caches so that we return the correct source from\n   * `src()`, `currentSource()`, and `currentSources()`.\n   *\n   * > Note: `currentSources` will not be updated if the source that is passed in exists\n   *         in the current `currentSources` cache.\n   *\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        A string or object source to update our caches to.\n   */\n\n\n  Player.prototype.updateSourceCaches_ = function updateSourceCaches_() {\n    var srcObj = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';\n\n\n    var src = srcObj;\n    var type = '';\n\n    if (typeof src !== 'string') {\n      src = srcObj.src;\n      type = srcObj.type;\n    }\n\n    // make sure all the caches are set to default values\n    // to prevent null checking\n    this.cache_.source = this.cache_.source || {};\n    this.cache_.sources = this.cache_.sources || [];\n\n    // try to get the type of the src that was passed in\n    if (src && !type) {\n      type = findMimetype(this, src);\n    }\n\n    // update `currentSource` cache always\n    this.cache_.source = mergeOptions({}, srcObj, { src: src, type: type });\n\n    var matchingSources = this.cache_.sources.filter(function (s) {\n      return s.src && s.src === src;\n    });\n    var sourceElSources = [];\n    var sourceEls = this.$$('source');\n    var matchingSourceEls = [];\n\n    for (var i = 0; i < sourceEls.length; i++) {\n      var sourceObj = getAttributes(sourceEls[i]);\n\n      sourceElSources.push(sourceObj);\n\n      if (sourceObj.src && sourceObj.src === src) {\n        matchingSourceEls.push(sourceObj.src);\n      }\n    }\n\n    // if we have matching source els but not matching sources\n    // the current source cache is not up to date\n    if (matchingSourceEls.length && !matchingSources.length) {\n      this.cache_.sources = sourceElSources;\n      // if we don't have matching source or source els set the\n      // sources cache to the `currentSource` cache\n    } else if (!matchingSources.length) {\n      this.cache_.sources = [this.cache_.source];\n    }\n\n    // update the tech `src` cache\n    this.cache_.src = src;\n  };\n\n  /**\n   * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n   * causing the media element to reload.\n   *\n   * It will fire for the initial source and each subsequent source.\n   * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n   *\n   * The event object for this event contains a `src` property that will contain the source\n   * that was available when the event was triggered. This is generally only necessary if Video.js\n   * is switching techs while the source was being changed.\n   *\n   * It is also fired when `load` is called on the player (or media element)\n   * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n   * says that the resource selection algorithm needs to be aborted and restarted.\n   * In this case, it is very likely that the `src` property will be set to the\n   * empty string `\"\"` to indicate we do not know what the source will be but\n   * that it is changing.\n   *\n   * *This event is currently still experimental and may change in minor releases.*\n   * __To use this, pass `enableSourceset` option to the player.__\n   *\n   * @event Player#sourceset\n   * @type {EventTarget~Event}\n   * @prop {string} src\n   *                The source url available when the `sourceset` was triggered.\n   *                It will be an empty string if we cannot know what the source is\n   *                but know that the source will change.\n   */\n  /**\n   * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#sourceset\n   * @listens Tech#sourceset\n   * @private\n   */\n\n\n  Player.prototype.handleTechSourceset_ = function handleTechSourceset_(event) {\n    var _this5 = this;\n\n    // only update the source cache when the source\n    // was not updated using the player api\n    if (!this.changingSrc_) {\n      var updateSourceCaches = function updateSourceCaches(src) {\n        return _this5.updateSourceCaches_(src);\n      };\n      var playerSrc = this.currentSource().src;\n      var eventSrc = event.src;\n\n      // if we have a playerSrc that is not a blob, and a tech src that is a blob\n      if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n\n        // if both the tech source and the player source were updated we assume\n        // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n        if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n          updateSourceCaches = function updateSourceCaches() {};\n        }\n      }\n\n      // update the source to the intial source right away\n      // in some cases this will be empty string\n      updateSourceCaches(eventSrc);\n\n      // if the `sourceset` `src` was an empty string\n      // wait for a `loadstart` to update the cache to `currentSrc`.\n      // If a sourceset happens before a `loadstart`, we reset the state\n      // as this function will be called again.\n      if (!event.src) {\n        var updateCache = function updateCache(e) {\n          if (e.type !== 'sourceset') {\n            var techSrc = _this5.techGet('currentSrc');\n\n            _this5.lastSource_.tech = techSrc;\n            _this5.updateSourceCaches_(techSrc);\n          }\n\n          _this5.tech_.off(['sourceset', 'loadstart'], updateCache);\n        };\n\n        this.tech_.one(['sourceset', 'loadstart'], updateCache);\n      }\n    }\n    this.lastSource_ = { player: this.currentSource().src, tech: event.src };\n\n    this.trigger({\n      src: event.src,\n      type: 'sourceset'\n    });\n  };\n\n  /**\n   * Add/remove the vjs-has-started class\n   *\n   * @fires Player#firstplay\n   *\n   * @param {boolean} request\n   *        - true: adds the class\n   *        - false: remove the class\n   *\n   * @return {boolean}\n   *         the boolean value of hasStarted_\n   */\n\n\n  Player.prototype.hasStarted = function hasStarted(request) {\n    if (request === undefined) {\n      // act as getter, if we have no request to change\n      return this.hasStarted_;\n    }\n\n    if (request === this.hasStarted_) {\n      return;\n    }\n\n    this.hasStarted_ = request;\n\n    if (this.hasStarted_) {\n      this.addClass('vjs-has-started');\n      this.trigger('firstplay');\n    } else {\n      this.removeClass('vjs-has-started');\n    }\n  };\n\n  /**\n   * Fired whenever the media begins or resumes playback\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n   * @fires Player#play\n   * @listens Tech#play\n   * @private\n   */\n\n\n  Player.prototype.handleTechPlay_ = function handleTechPlay_() {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing');\n\n    // hide the poster when the user hits play\n    this.hasStarted(true);\n    /**\n     * Triggered whenever an {@link Tech#play} event happens. Indicates that\n     * playback has started or resumed.\n     *\n     * @event Player#play\n     * @type {EventTarget~Event}\n     */\n    this.trigger('play');\n  };\n\n  /**\n   * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n   *\n   * If there were any events queued while the playback rate was zero, fire\n   * those events now.\n   *\n   * @private\n   * @method Player#handleTechRateChange_\n   * @fires Player#ratechange\n   * @listens Tech#ratechange\n   */\n\n\n  Player.prototype.handleTechRateChange_ = function handleTechRateChange_() {\n    if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n      this.queuedCallbacks_.forEach(function (queued) {\n        return queued.callback(queued.event);\n      });\n      this.queuedCallbacks_ = [];\n    }\n    this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n    /**\n     * Fires when the playing speed of the audio/video is changed\n     *\n     * @event Player#ratechange\n     * @type {event}\n     */\n    this.trigger('ratechange');\n  };\n\n  /**\n   * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#waiting\n   * @listens Tech#waiting\n   * @private\n   */\n\n\n  Player.prototype.handleTechWaiting_ = function handleTechWaiting_() {\n    var _this6 = this;\n\n    this.addClass('vjs-waiting');\n    /**\n     * A readyState change on the DOM element has caused playback to stop.\n     *\n     * @event Player#waiting\n     * @type {EventTarget~Event}\n     */\n    this.trigger('waiting');\n    this.one('timeupdate', function () {\n      return _this6.removeClass('vjs-waiting');\n    });\n  };\n\n  /**\n   * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n   * > Note: This is not consistent between browsers. See #1351\n   *\n   * @fires Player#canplay\n   * @listens Tech#canplay\n   * @private\n   */\n\n\n  Player.prototype.handleTechCanPlay_ = function handleTechCanPlay_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_FUTURE_DATA or greater.\n     *\n     * @event Player#canplay\n     * @type {EventTarget~Event}\n     */\n    this.trigger('canplay');\n  };\n\n  /**\n   * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#canplaythrough\n   * @listens Tech#canplaythrough\n   * @private\n   */\n\n\n  Player.prototype.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n     * entire media file can be played without buffering.\n     *\n     * @event Player#canplaythrough\n     * @type {EventTarget~Event}\n     */\n    this.trigger('canplaythrough');\n  };\n\n  /**\n   * Retrigger the `playing` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#playing\n   * @listens Tech#playing\n   * @private\n   */\n\n\n  Player.prototype.handleTechPlaying_ = function handleTechPlaying_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media is no longer blocked from playback, and has started playing.\n     *\n     * @event Player#playing\n     * @type {EventTarget~Event}\n     */\n    this.trigger('playing');\n  };\n\n  /**\n   * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeking\n   * @listens Tech#seeking\n   * @private\n   */\n\n\n  Player.prototype.handleTechSeeking_ = function handleTechSeeking_() {\n    this.addClass('vjs-seeking');\n    /**\n     * Fired whenever the player is jumping to a new time\n     *\n     * @event Player#seeking\n     * @type {EventTarget~Event}\n     */\n    this.trigger('seeking');\n  };\n\n  /**\n   * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeked\n   * @listens Tech#seeked\n   * @private\n   */\n\n\n  Player.prototype.handleTechSeeked_ = function handleTechSeeked_() {\n    this.removeClass('vjs-seeking');\n    /**\n     * Fired when the player has finished jumping to a new time\n     *\n     * @event Player#seeked\n     * @type {EventTarget~Event}\n     */\n    this.trigger('seeked');\n  };\n\n  /**\n   * Retrigger the `firstplay` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#firstplay\n   * @listens Tech#firstplay\n   * @deprecated As of 6.0 firstplay event is deprecated.\n   *             As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.\n   * @private\n   */\n\n\n  Player.prototype.handleTechFirstPlay_ = function handleTechFirstPlay_() {\n    // If the first starttime attribute is specified\n    // then we will start at the given offset in seconds\n    if (this.options_.starttime) {\n      log.warn('Passing the `starttime` option to the player will be deprecated in 6.0');\n      this.currentTime(this.options_.starttime);\n    }\n\n    this.addClass('vjs-has-started');\n    /**\n     * Fired the first time a video is played. Not part of the HLS spec, and this is\n     * probably not the best implementation yet, so use sparingly. If you don't have a\n     * reason to prevent playback, use `myPlayer.one('play');` instead.\n     *\n     * @event Player#firstplay\n     * @deprecated As of 6.0 firstplay event is deprecated.\n     * @type {EventTarget~Event}\n     */\n    this.trigger('firstplay');\n  };\n\n  /**\n   * Retrigger the `pause` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#pause\n   * @listens Tech#pause\n   * @private\n   */\n\n\n  Player.prototype.handleTechPause_ = function handleTechPause_() {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    /**\n     * Fired whenever the media has been paused\n     *\n     * @event Player#pause\n     * @type {EventTarget~Event}\n     */\n    this.trigger('pause');\n  };\n\n  /**\n   * Retrigger the `ended` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#ended\n   * @listens Tech#ended\n   * @private\n   */\n\n\n  Player.prototype.handleTechEnded_ = function handleTechEnded_() {\n    this.addClass('vjs-ended');\n    if (this.options_.loop) {\n      this.currentTime(0);\n      this.play();\n    } else if (!this.paused()) {\n      this.pause();\n    }\n\n    /**\n     * Fired when the end of the media resource is reached (currentTime == duration)\n     *\n     * @event Player#ended\n     * @type {EventTarget~Event}\n     */\n    this.trigger('ended');\n  };\n\n  /**\n   * Fired when the duration of the media resource is first known or changed\n   *\n   * @listens Tech#durationchange\n   * @private\n   */\n\n\n  Player.prototype.handleTechDurationChange_ = function handleTechDurationChange_() {\n    this.duration(this.techGet_('duration'));\n  };\n\n  /**\n   * Handle a click on the media element to play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#mousedown\n   * @private\n   */\n\n\n  Player.prototype.handleTechClick_ = function handleTechClick_(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    // When controls are disabled a click should not toggle playback because\n    // the click is considered a control\n    if (!this.controls_) {\n      return;\n    }\n\n    if (this.paused()) {\n      silencePromise(this.play());\n    } else {\n      this.pause();\n    }\n  };\n\n  /**\n   * Handle a tap on the media element. It will toggle the user\n   * activity state, which hides and shows the controls.\n   *\n   * @listens Tech#tap\n   * @private\n   */\n\n\n  Player.prototype.handleTechTap_ = function handleTechTap_() {\n    this.userActive(!this.userActive());\n  };\n\n  /**\n   * Handle touch to start\n   *\n   * @listens Tech#touchstart\n   * @private\n   */\n\n\n  Player.prototype.handleTechTouchStart_ = function handleTechTouchStart_() {\n    this.userWasActive = this.userActive();\n  };\n\n  /**\n   * Handle touch to move\n   *\n   * @listens Tech#touchmove\n   * @private\n   */\n\n\n  Player.prototype.handleTechTouchMove_ = function handleTechTouchMove_() {\n    if (this.userWasActive) {\n      this.reportUserActivity();\n    }\n  };\n\n  /**\n   * Handle touch to end\n   *\n   * @param {EventTarget~Event} event\n   *        the touchend event that triggered\n   *        this function\n   *\n   * @listens Tech#touchend\n   * @private\n   */\n\n\n  Player.prototype.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {\n    // Stop the mouse events from also happening\n    event.preventDefault();\n  };\n\n  /**\n   * Fired when the player switches in or out of fullscreen mode\n   *\n   * @private\n   * @listens Player#fullscreenchange\n   */\n\n\n  Player.prototype.handleFullscreenChange_ = function handleFullscreenChange_() {\n    if (this.isFullscreen()) {\n      this.addClass('vjs-fullscreen');\n    } else {\n      this.removeClass('vjs-fullscreen');\n    }\n  };\n\n  /**\n   * native click events on the SWF aren't triggered on IE11, Win8.1RT\n   * use stageclick events triggered from inside the SWF instead\n   *\n   * @private\n   * @listens stageclick\n   */\n\n\n  Player.prototype.handleStageClick_ = function handleStageClick_() {\n    this.reportUserActivity();\n  };\n\n  /**\n   * Handle Tech Fullscreen Change\n   *\n   * @param {EventTarget~Event} event\n   *        the fullscreenchange event that triggered this function\n   *\n   * @param {Object} data\n   *        the data that was sent with the event\n   *\n   * @private\n   * @listens Tech#fullscreenchange\n   * @fires Player#fullscreenchange\n   */\n\n\n  Player.prototype.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {\n    if (data) {\n      this.isFullscreen(data.isFullscreen);\n    }\n    /**\n     * Fired when going in and out of fullscreen.\n     *\n     * @event Player#fullscreenchange\n     * @type {EventTarget~Event}\n     */\n    this.trigger('fullscreenchange');\n  };\n\n  /**\n   * Fires when an error occurred during the loading of an audio/video.\n   *\n   * @private\n   * @listens Tech#error\n   */\n\n\n  Player.prototype.handleTechError_ = function handleTechError_() {\n    var error = this.tech_.error();\n\n    this.error(error);\n  };\n\n  /**\n   * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#textdata\n   * @listens Tech#textdata\n   * @private\n   */\n\n\n  Player.prototype.handleTechTextData_ = function handleTechTextData_() {\n    var data = null;\n\n    if (arguments.length > 1) {\n      data = arguments[1];\n    }\n\n    /**\n     * Fires when we get a textdata event from tech\n     *\n     * @event Player#textdata\n     * @type {EventTarget~Event}\n     */\n    this.trigger('textdata', data);\n  };\n\n  /**\n   * Get object for cached values.\n   *\n   * @return {Object}\n   *         get the current object cache\n   */\n\n\n  Player.prototype.getCache = function getCache() {\n    return this.cache_;\n  };\n\n  /**\n   * Pass values to the playback tech\n   *\n   * @param {string} [method]\n   *        the method to call\n   *\n   * @param {Object} arg\n   *        the argument to pass\n   *\n   * @private\n   */\n\n\n  Player.prototype.techCall_ = function techCall_(method, arg) {\n    // If it's not ready yet, call method when it is\n\n    this.ready(function () {\n      if (method in allowedSetters) {\n        return set$1(this.middleware_, this.tech_, method, arg);\n      } else if (method in allowedMediators) {\n        return mediate(this.middleware_, this.tech_, method, arg);\n      }\n\n      try {\n        if (this.tech_) {\n          this.tech_[method](arg);\n        }\n      } catch (e) {\n        log(e);\n        throw e;\n      }\n    }, true);\n  };\n\n  /**\n   * Get calls can't wait for the tech, and sometimes don't need to.\n   *\n   * @param {string} method\n   *        Tech method\n   *\n   * @return {Function|undefined}\n   *         the method or undefined\n   *\n   * @private\n   */\n\n\n  Player.prototype.techGet_ = function techGet_(method) {\n    if (!this.tech_ || !this.tech_.isReady_) {\n      return;\n    }\n\n    if (method in allowedGetters) {\n      return get$1(this.middleware_, this.tech_, method);\n    } else if (method in allowedMediators) {\n      return mediate(this.middleware_, this.tech_, method);\n    }\n\n    // Flash likes to die and reload when you hide or reposition it.\n    // In these cases the object methods go away and we get errors.\n    // When that happens we'll catch the errors and inform tech that it's not ready any more.\n    try {\n      return this.tech_[method]();\n    } catch (e) {\n\n      // When building additional tech libs, an expected method may not be defined yet\n      if (this.tech_[method] === undefined) {\n        log('Video.js: ' + method + ' method not defined for ' + this.techName_ + ' playback technology.', e);\n        throw e;\n      }\n\n      // When a method isn't available on the object it throws a TypeError\n      if (e.name === 'TypeError') {\n        log('Video.js: ' + method + ' unavailable on ' + this.techName_ + ' playback technology element.', e);\n        this.tech_.isReady_ = false;\n        throw e;\n      }\n\n      // If error unknown, just log and throw\n      log(e);\n      throw e;\n    }\n  };\n\n  /**\n   * Attempt to begin playback at the first opportunity.\n   *\n   * @return {Promise|undefined}\n   *         Returns a promise if the browser supports Promises (or one\n   *         was passed in as an option). This promise will be resolved on\n   *         the return value of play. If this is undefined it will fulfill the\n   *         promise chain otherwise the promise chain will be fulfilled when\n   *         the promise from play is fulfilled.\n   */\n\n\n  Player.prototype.play = function play() {\n    var _this7 = this;\n\n    var PromiseClass = this.options_.Promise || window.Promise;\n\n    if (PromiseClass) {\n      return new PromiseClass(function (resolve) {\n        _this7.play_(resolve);\n      });\n    }\n\n    return this.play_();\n  };\n\n  /**\n   * The actual logic for play, takes a callback that will be resolved on the\n   * return value of play. This allows us to resolve to the play promise if there\n   * is one on modern browsers.\n   *\n   * @private\n   * @param {Function} [callback]\n   *        The callback that should be called when the techs play is actually called\n   */\n\n\n  Player.prototype.play_ = function play_() {\n    var _this8 = this;\n\n    var callback = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : silencePromise;\n\n    // If this is called while we have a play queued up on a loadstart, remove\n    // that listener to avoid getting in a potentially bad state.\n    if (this.playOnLoadstart_) {\n      this.off('loadstart', this.playOnLoadstart_);\n    }\n\n    // If the player/tech is not ready, queue up another call to `play()` for\n    // when it is. This will loop back into this method for another attempt at\n    // playback when the tech is ready.\n    if (!this.isReady_) {\n\n      // Bail out if we're already waiting for `ready`!\n      if (this.playWaitingForReady_) {\n        return;\n      }\n\n      this.playWaitingForReady_ = true;\n      this.ready(function () {\n        _this8.playWaitingForReady_ = false;\n        callback(_this8.play());\n      });\n\n      // If the player/tech is ready and we have a source, we can attempt playback.\n    } else if (!this.changingSrc_ && (this.src() || this.currentSrc())) {\n      callback(this.techGet_('play'));\n      return;\n\n      // If the tech is ready, but we do not have a source, we'll need to wait\n      // for both the `ready` and a `loadstart` when the source is finally\n      // resolved by middleware and set on the player.\n      //\n      // This can happen if `play()` is called while changing sources or before\n      // one has been set on the player.\n    } else {\n\n      this.playOnLoadstart_ = function () {\n        _this8.playOnLoadstart_ = null;\n        callback(_this8.play());\n      };\n\n      this.one('loadstart', this.playOnLoadstart_);\n    }\n  };\n\n  /**\n   * Pause the video playback\n   *\n   * @return {Player}\n   *         A reference to the player object this function was called on\n   */\n\n\n  Player.prototype.pause = function pause() {\n    this.techCall_('pause');\n  };\n\n  /**\n   * Check if the player is paused or has yet to play\n   *\n   * @return {boolean}\n   *         - false: if the media is currently playing\n   *         - true: if media is not currently playing\n   */\n\n\n  Player.prototype.paused = function paused() {\n    // The initial state of paused should be true (in Safari it's actually false)\n    return this.techGet_('paused') === false ? false : true;\n  };\n\n  /**\n   * Get a TimeRange object representing the current ranges of time that the user\n   * has played.\n   *\n   * @return {TimeRange}\n   *         A time range object that represents all the increments of time that have\n   *         been played.\n   */\n\n\n  Player.prototype.played = function played() {\n    return this.techGet_('played') || createTimeRanges(0, 0);\n  };\n\n  /**\n   * Returns whether or not the user is \"scrubbing\". Scrubbing is\n   * when the user has clicked the progress bar handle and is\n   * dragging it along the progress bar.\n   *\n   * @param {boolean} [isScrubbing]\n   *        wether the user is or is not scrubbing\n   *\n   * @return {boolean}\n   *         The value of scrubbing when getting\n   */\n\n\n  Player.prototype.scrubbing = function scrubbing(isScrubbing) {\n    if (typeof isScrubbing === 'undefined') {\n      return this.scrubbing_;\n    }\n    this.scrubbing_ = !!isScrubbing;\n\n    if (isScrubbing) {\n      this.addClass('vjs-scrubbing');\n    } else {\n      this.removeClass('vjs-scrubbing');\n    }\n  };\n\n  /**\n   * Get or set the current time (in seconds)\n   *\n   * @param {number|string} [seconds]\n   *        The time to seek to in seconds\n   *\n   * @return {number}\n   *         - the current time in seconds when getting\n   */\n\n\n  Player.prototype.currentTime = function currentTime(seconds) {\n    if (typeof seconds !== 'undefined') {\n      if (seconds < 0) {\n        seconds = 0;\n      }\n      this.techCall_('setCurrentTime', seconds);\n      return;\n    }\n\n    // cache last currentTime and return. default to 0 seconds\n    //\n    // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n    // currentTime when scrubbing, but may not provide much performance benefit afterall.\n    // Should be tested. Also something has to read the actual current time or the cache will\n    // never get updated.\n    this.cache_.currentTime = this.techGet_('currentTime') || 0;\n    return this.cache_.currentTime;\n  };\n\n  /**\n   * Normally gets the length in time of the video in seconds;\n   * in all but the rarest use cases an argument will NOT be passed to the method\n   *\n   * > **NOTE**: The video must have started loading before the duration can be\n   * known, and in the case of Flash, may not be known until the video starts\n   * playing.\n   *\n   * @fires Player#durationchange\n   *\n   * @param {number} [seconds]\n   *        The duration of the video to set in seconds\n   *\n   * @return {number}\n   *         - The duration of the video in seconds when getting\n   */\n\n\n  Player.prototype.duration = function duration(seconds) {\n    if (seconds === undefined) {\n      // return NaN if the duration is not known\n      return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n    }\n\n    seconds = parseFloat(seconds);\n\n    // Standardize on Inifity for signaling video is live\n    if (seconds < 0) {\n      seconds = Infinity;\n    }\n\n    if (seconds !== this.cache_.duration) {\n      // Cache the last set value for optimized scrubbing (esp. Flash)\n      this.cache_.duration = seconds;\n\n      if (seconds === Infinity) {\n        this.addClass('vjs-live');\n      } else {\n        this.removeClass('vjs-live');\n      }\n      /**\n       * @event Player#durationchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('durationchange');\n    }\n  };\n\n  /**\n   * Calculates how much time is left in the video. Not part\n   * of the native video API.\n   *\n   * @return {number}\n   *         The time remaining in seconds\n   */\n\n\n  Player.prototype.remainingTime = function remainingTime() {\n    return this.duration() - this.currentTime();\n  };\n\n  /**\n   * A remaining time function that is intented to be used when\n   * the time is to be displayed directly to the user.\n   *\n   * @return {number}\n   *         The rounded time remaining in seconds\n   */\n\n\n  Player.prototype.remainingTimeDisplay = function remainingTimeDisplay() {\n    return Math.floor(this.duration()) - Math.floor(this.currentTime());\n  };\n\n  //\n  // Kind of like an array of portions of the video that have been downloaded.\n\n  /**\n   * Get a TimeRange object with an array of the times of the video\n   * that have been downloaded. If you just want the percent of the\n   * video that's been downloaded, use bufferedPercent.\n   *\n   * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n   *\n   * @return {TimeRange}\n   *         A mock TimeRange object (following HTML spec)\n   */\n\n\n  Player.prototype.buffered = function buffered() {\n    var buffered = this.techGet_('buffered');\n\n    if (!buffered || !buffered.length) {\n      buffered = createTimeRanges(0, 0);\n    }\n\n    return buffered;\n  };\n\n  /**\n   * Get the percent (as a decimal) of the video that's been downloaded.\n   * This method is not a part of the native HTML video API.\n   *\n   * @return {number}\n   *         A decimal between 0 and 1 representing the percent\n   *         that is bufferred 0 being 0% and 1 being 100%\n   */\n\n\n  Player.prototype.bufferedPercent = function bufferedPercent$$1() {\n    return bufferedPercent(this.buffered(), this.duration());\n  };\n\n  /**\n   * Get the ending time of the last buffered time range\n   * This is used in the progress bar to encapsulate all time ranges.\n   *\n   * @return {number}\n   *         The end of the last buffered time range\n   */\n\n\n  Player.prototype.bufferedEnd = function bufferedEnd() {\n    var buffered = this.buffered();\n    var duration = this.duration();\n    var end = buffered.end(buffered.length - 1);\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    return end;\n  };\n\n  /**\n   * Get or set the current volume of the media\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         The current volume as a percent when getting\n   */\n\n\n  Player.prototype.volume = function volume(percentAsDecimal) {\n    var vol = void 0;\n\n    if (percentAsDecimal !== undefined) {\n      // Force value to between 0 and 1\n      vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n      this.cache_.volume = vol;\n      this.techCall_('setVolume', vol);\n\n      if (vol > 0) {\n        this.lastVolume_(vol);\n      }\n\n      return;\n    }\n\n    // Default to 1 when returning current volume.\n    vol = parseFloat(this.techGet_('volume'));\n    return isNaN(vol) ? 1 : vol;\n  };\n\n  /**\n   * Get the current muted state, or turn mute on or off\n   *\n   * @param {boolean} [muted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean}\n   *         - true if mute is on and getting\n   *         - false if mute is off and getting\n   */\n\n\n  Player.prototype.muted = function muted(_muted) {\n    if (_muted !== undefined) {\n      this.techCall_('setMuted', _muted);\n      return;\n    }\n    return this.techGet_('muted') || false;\n  };\n\n  /**\n   * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n   * indicates the state of muted on intial playback.\n   *\n   * ```js\n   *   var myPlayer = videojs('some-player-id');\n   *\n   *   myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n   *\n   *   // get, should be false\n   *   console.log(myPlayer.defaultMuted());\n   *   // set to true\n   *   myPlayer.defaultMuted(true);\n   *   // get should be true\n   *   console.log(myPlayer.defaultMuted());\n   * ```\n   *\n   * @param {boolean} [defaultMuted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean|Player}\n   *         - true if defaultMuted is on and getting\n   *         - false if defaultMuted is off and getting\n   *         - A reference to the current player when setting\n   */\n\n\n  Player.prototype.defaultMuted = function defaultMuted(_defaultMuted) {\n    if (_defaultMuted !== undefined) {\n      return this.techCall_('setDefaultMuted', _defaultMuted);\n    }\n    return this.techGet_('defaultMuted') || false;\n  };\n\n  /**\n   * Get the last volume, or set it\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new last volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         the current value of lastVolume as a percent when getting\n   *\n   * @private\n   */\n\n\n  Player.prototype.lastVolume_ = function lastVolume_(percentAsDecimal) {\n    if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n      this.cache_.lastVolume = percentAsDecimal;\n      return;\n    }\n    return this.cache_.lastVolume;\n  };\n\n  /**\n   * Check if current tech can support native fullscreen\n   * (e.g. with built in controls like iOS, so not our flash swf)\n   *\n   * @return {boolean}\n   *         if native fullscreen is supported\n   */\n\n\n  Player.prototype.supportsFullScreen = function supportsFullScreen() {\n    return this.techGet_('supportsFullScreen') || false;\n  };\n\n  /**\n   * Check if the player is in fullscreen mode or tell the player that it\n   * is or is not in fullscreen mode.\n   *\n   * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n   * property and instead document.fullscreenElement is used. But isFullscreen is\n   * still a valuable property for internal player workings.\n   *\n   * @param  {boolean} [isFS]\n   *         Set the players current fullscreen state\n   *\n   * @return {boolean}\n   *         - true if fullscreen is on and getting\n   *         - false if fullscreen is off and getting\n   */\n\n\n  Player.prototype.isFullscreen = function isFullscreen(isFS) {\n    if (isFS !== undefined) {\n      this.isFullscreen_ = !!isFS;\n      return;\n    }\n    return !!this.isFullscreen_;\n  };\n\n  /**\n   * Increase the size of the video to full screen\n   * In some browsers, full screen is not supported natively, so it enters\n   * \"full window mode\", where the video fills the browser window.\n   * In browsers and devices that support native full screen, sometimes the\n   * browser's default controls will be shown, and not the Video.js custom skin.\n   * This includes most mobile devices (iOS, Android) and older versions of\n   * Safari.\n   *\n   * @fires Player#fullscreenchange\n   */\n\n\n  Player.prototype.requestFullscreen = function requestFullscreen() {\n    var fsApi = FullscreenApi;\n\n    this.isFullscreen(true);\n\n    if (fsApi.requestFullscreen) {\n      // the browser supports going fullscreen at the element level so we can\n      // take the controls fullscreen as well as the video\n\n      // Trigger fullscreenchange event after change\n      // We have to specifically add this each time, and remove\n      // when canceling fullscreen. Otherwise if there's multiple\n      // players on a page, they would all be reacting to the same fullscreen\n      // events\n      on(document, fsApi.fullscreenchange, bind(this, function documentFullscreenChange(e) {\n        this.isFullscreen(document[fsApi.fullscreenElement]);\n\n        // If cancelling fullscreen, remove event listener.\n        if (this.isFullscreen() === false) {\n          off(document, fsApi.fullscreenchange, documentFullscreenChange);\n        }\n        /**\n         * @event Player#fullscreenchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('fullscreenchange');\n      }));\n\n      this.el_[fsApi.requestFullscreen]();\n    } else if (this.tech_.supportsFullScreen()) {\n      // we can't take the video.js controls fullscreen but we can go fullscreen\n      // with native controls\n      this.techCall_('enterFullScreen');\n    } else {\n      // fullscreen isn't supported so we'll just stretch the video element to\n      // fill the viewport\n      this.enterFullWindow();\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('fullscreenchange');\n    }\n  };\n\n  /**\n   * Return the video to its normal size after having been in full screen mode\n   *\n   * @fires Player#fullscreenchange\n   */\n\n\n  Player.prototype.exitFullscreen = function exitFullscreen() {\n    var fsApi = FullscreenApi;\n\n    this.isFullscreen(false);\n\n    // Check for browser element fullscreen support\n    if (fsApi.requestFullscreen) {\n      document[fsApi.exitFullscreen]();\n    } else if (this.tech_.supportsFullScreen()) {\n      this.techCall_('exitFullScreen');\n    } else {\n      this.exitFullWindow();\n      /**\n       * @event Player#fullscreenchange\n       * @type {EventTarget~Event}\n       */\n      this.trigger('fullscreenchange');\n    }\n  };\n\n  /**\n   * When fullscreen isn't supported we can stretch the\n   * video container to as wide as the browser will let us.\n   *\n   * @fires Player#enterFullWindow\n   */\n\n\n  Player.prototype.enterFullWindow = function enterFullWindow() {\n    this.isFullWindow = true;\n\n    // Storing original doc overflow value to return to when fullscreen is off\n    this.docOrigOverflow = document.documentElement.style.overflow;\n\n    // Add listener for esc key to exit fullscreen\n    on(document, 'keydown', bind(this, this.fullWindowOnEscKey));\n\n    // Hide any scroll bars\n    document.documentElement.style.overflow = 'hidden';\n\n    // Apply fullscreen styles\n    addClass(document.body, 'vjs-full-window');\n\n    /**\n     * @event Player#enterFullWindow\n     * @type {EventTarget~Event}\n     */\n    this.trigger('enterFullWindow');\n  };\n\n  /**\n   * Check for call to either exit full window or\n   * full screen on ESC key\n   *\n   * @param {string} event\n   *        Event to check for key press\n   */\n\n\n  Player.prototype.fullWindowOnEscKey = function fullWindowOnEscKey(event) {\n    if (event.keyCode === 27) {\n      if (this.isFullscreen() === true) {\n        this.exitFullscreen();\n      } else {\n        this.exitFullWindow();\n      }\n    }\n  };\n\n  /**\n   * Exit full window\n   *\n   * @fires Player#exitFullWindow\n   */\n\n\n  Player.prototype.exitFullWindow = function exitFullWindow() {\n    this.isFullWindow = false;\n    off(document, 'keydown', this.fullWindowOnEscKey);\n\n    // Unhide scroll bars.\n    document.documentElement.style.overflow = this.docOrigOverflow;\n\n    // Remove fullscreen styles\n    removeClass(document.body, 'vjs-full-window');\n\n    // Resize the box, controller, and poster to original sizes\n    // this.positionAll();\n    /**\n     * @event Player#exitFullWindow\n     * @type {EventTarget~Event}\n     */\n    this.trigger('exitFullWindow');\n  };\n\n  /**\n   * Check whether the player can play a given mimetype\n   *\n   * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n   *\n   * @param {string} type\n   *        The mimetype to check\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  Player.prototype.canPlayType = function canPlayType(type) {\n    var can = void 0;\n\n    // Loop through each playback technology in the options order\n    for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {\n      var techName = j[i];\n      var tech = Tech.getTech(techName);\n\n      // Support old behavior of techs being registered as components.\n      // Remove once that deprecated behavior is removed.\n      if (!tech) {\n        tech = Component.getComponent(techName);\n      }\n\n      // Check if the current tech is defined before continuing\n      if (!tech) {\n        log.error('The \"' + techName + '\" tech is undefined. Skipped browser support check for that tech.');\n        continue;\n      }\n\n      // Check if the browser supports this technology\n      if (tech.isSupported()) {\n        can = tech.canPlayType(type);\n\n        if (can) {\n          return can;\n        }\n      }\n    }\n\n    return '';\n  };\n\n  /**\n   * Select source based on tech-order or source-order\n   * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n   * defaults to tech-order selection\n   *\n   * @param {Array} sources\n   *        The sources for a media asset\n   *\n   * @return {Object|boolean}\n   *         Object of source and tech order or false\n   */\n\n\n  Player.prototype.selectSource = function selectSource(sources) {\n    var _this9 = this;\n\n    // Get only the techs specified in `techOrder` that exist and are supported by the\n    // current platform\n    var techs = this.options_.techOrder.map(function (techName) {\n      return [techName, Tech.getTech(techName)];\n    }).filter(function (_ref) {\n      var techName = _ref[0],\n          tech = _ref[1];\n\n      // Check if the current tech is defined before continuing\n      if (tech) {\n        // Check if the browser supports this technology\n        return tech.isSupported();\n      }\n\n      log.error('The \"' + techName + '\" tech is undefined. Skipped browser support check for that tech.');\n      return false;\n    });\n\n    // Iterate over each `innerArray` element once per `outerArray` element and execute\n    // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n    // that value.\n    var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {\n      var found = void 0;\n\n      outerArray.some(function (outerChoice) {\n        return innerArray.some(function (innerChoice) {\n          found = tester(outerChoice, innerChoice);\n\n          if (found) {\n            return true;\n          }\n        });\n      });\n\n      return found;\n    };\n\n    var foundSourceAndTech = void 0;\n    var flip = function flip(fn) {\n      return function (a, b) {\n        return fn(b, a);\n      };\n    };\n    var finder = function finder(_ref2, source) {\n      var techName = _ref2[0],\n          tech = _ref2[1];\n\n      if (tech.canPlaySource(source, _this9.options_[techName.toLowerCase()])) {\n        return { source: source, tech: techName };\n      }\n    };\n\n    // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n    // to select from them based on their priority.\n    if (this.options_.sourceOrder) {\n      // Source-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n    } else {\n      // Tech-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n    }\n\n    return foundSourceAndTech || false;\n  };\n\n  /**\n   * Get or set the video source.\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n\n\n  Player.prototype.src = function src(source) {\n    var _this10 = this;\n\n    // getter usage\n    if (typeof source === 'undefined') {\n      return this.cache_.src || '';\n    }\n    // filter out invalid sources and turn our source into\n    // an array of source objects\n    var sources = filterSource(source);\n\n    // if a source was passed in then it is invalid because\n    // it was filtered to a zero length Array. So we have to\n    // show an error\n    if (!sources.length) {\n      this.setTimeout(function () {\n        this.error({ code: 4, message: this.localize(this.options_.notSupportedMessage) });\n      }, 0);\n      return;\n    }\n\n    // intial sources\n    this.changingSrc_ = true;\n\n    this.cache_.sources = sources;\n    this.updateSourceCaches_(sources[0]);\n\n    // middlewareSource is the source after it has been changed by middleware\n    setSource(this, sources[0], function (middlewareSource, mws) {\n      _this10.middleware_ = mws;\n\n      // since sourceSet is async we have to update the cache again after we select a source since\n      // the source that is selected could be out of order from the cache update above this callback.\n      _this10.cache_.sources = sources;\n      _this10.updateSourceCaches_(middlewareSource);\n\n      var err = _this10.src_(middlewareSource);\n\n      if (err) {\n        if (sources.length > 1) {\n          return _this10.src(sources.slice(1));\n        }\n\n        _this10.changingSrc_ = false;\n\n        // We need to wrap this in a timeout to give folks a chance to add error event handlers\n        _this10.setTimeout(function () {\n          this.error({ code: 4, message: this.localize(this.options_.notSupportedMessage) });\n        }, 0);\n\n        // we could not find an appropriate tech, but let's still notify the delegate that this is it\n        // this needs a better comment about why this is needed\n        _this10.triggerReady();\n\n        return;\n      }\n\n      setTech(mws, _this10.tech_);\n    });\n  };\n\n  /**\n   * Set the source object on the tech, returns a boolean that indicates wether\n   * there is a tech that can play the source or not\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object to set on the Tech\n   *\n   * @return {Boolean}\n   *         - True if there is no Tech to playback this source\n   *         - False otherwise\n   *\n   * @private\n   */\n\n\n  Player.prototype.src_ = function src_(source) {\n    var _this11 = this;\n\n    var sourceTech = this.selectSource([source]);\n\n    if (!sourceTech) {\n      return true;\n    }\n\n    if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n      this.changingSrc_ = true;\n      // load this technology with the chosen source\n      this.loadTech_(sourceTech.tech, sourceTech.source);\n      this.tech_.ready(function () {\n        _this11.changingSrc_ = false;\n      });\n      return false;\n    }\n\n    // wait until the tech is ready to set the source\n    // and set it synchronously if possible (#2326)\n    this.ready(function () {\n\n      // The setSource tech method was added with source handlers\n      // so older techs won't support it\n      // We need to check the direct prototype for the case where subclasses\n      // of the tech do not support source handlers\n      if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n        this.techCall_('setSource', source);\n      } else {\n        this.techCall_('src', source.src);\n      }\n\n      this.changingSrc_ = false;\n    }, true);\n\n    return false;\n  };\n\n  /**\n   * Begin loading the src data.\n   */\n\n\n  Player.prototype.load = function load() {\n    this.techCall_('load');\n  };\n\n  /**\n   * Reset the player. Loads the first tech in the techOrder,\n   * removes all the text tracks in the existing `tech`,\n   * and calls `reset` on the `tech`.\n   */\n\n\n  Player.prototype.reset = function reset() {\n    if (this.tech_) {\n      this.tech_.clearTracks('text');\n    }\n    this.loadTech_(this.options_.techOrder[0], null);\n    this.techCall_('reset');\n  };\n\n  /**\n   * Returns all of the current source objects.\n   *\n   * @return {Tech~SourceObject[]}\n   *         The current source objects\n   */\n\n\n  Player.prototype.currentSources = function currentSources() {\n    var source = this.currentSource();\n    var sources = [];\n\n    // assume `{}` or `{ src }`\n    if (Object.keys(source).length !== 0) {\n      sources.push(source);\n    }\n\n    return this.cache_.sources || sources;\n  };\n\n  /**\n   * Returns the current source object.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object\n   */\n\n\n  Player.prototype.currentSource = function currentSource() {\n    return this.cache_.source || {};\n  };\n\n  /**\n   * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n   * Can be used in conjuction with `currentType` to assist in rebuilding the current source object.\n   *\n   * @return {string}\n   *         The current source\n   */\n\n\n  Player.prototype.currentSrc = function currentSrc() {\n    return this.currentSource() && this.currentSource().src || '';\n  };\n\n  /**\n   * Get the current source type e.g. video/mp4\n   * This can allow you rebuild the current source object so that you could load the same\n   * source and tech later\n   *\n   * @return {string}\n   *         The source MIME type\n   */\n\n\n  Player.prototype.currentType = function currentType() {\n    return this.currentSource() && this.currentSource().type || '';\n  };\n\n  /**\n   * Get or set the preload attribute\n   *\n   * @param {boolean} [value]\n   *        - true means that we should preload\n   *        - false maens that we should not preload\n   *\n   * @return {string}\n   *         The preload attribute value when getting\n   */\n\n\n  Player.prototype.preload = function preload(value) {\n    if (value !== undefined) {\n      this.techCall_('setPreload', value);\n      this.options_.preload = value;\n      return;\n    }\n    return this.techGet_('preload');\n  };\n\n  /**\n   * Get or set the autoplay option. When this is a boolean it will\n   * modify the attribute on the tech. When this is a string the attribute on\n   * the tech will be removed and `Player` will handle autoplay on loadstarts.\n   *\n   * @param {boolean|string} [value]\n   *        - true: autoplay using the browser behavior\n   *        - false: do not autoplay\n   *        - 'play': call play() on every loadstart\n   *        - 'muted': call muted() then play() on every loadstart\n   *        - 'any': call play() on every loadstart. if that fails call muted() then play().\n   *        - *: values other than those listed here will be set `autoplay` to true\n   *\n   * @return {boolean|string}\n   *         The current value of autoplay when getting\n   */\n\n\n  Player.prototype.autoplay = function autoplay(value) {\n    // getter usage\n    if (value === undefined) {\n      return this.options_.autoplay || false;\n    }\n\n    var techAutoplay = void 0;\n\n    // if the value is a valid string set it to that\n    if (typeof value === 'string' && /(any|play|muted)/.test(value)) {\n      this.options_.autoplay = value;\n      this.manualAutoplay_(value);\n      techAutoplay = false;\n\n      // any falsy value sets autoplay to false in the browser,\n      // lets do the same\n    } else if (!value) {\n      this.options_.autoplay = false;\n\n      // any other value (ie truthy) sets autoplay to true\n    } else {\n      this.options_.autoplay = true;\n    }\n\n    techAutoplay = techAutoplay || this.options_.autoplay;\n\n    // if we don't have a tech then we do not queue up\n    // a setAutoplay call on tech ready. We do this because the\n    // autoplay option will be passed in the constructor and we\n    // do not need to set it twice\n    if (this.tech_) {\n      this.techCall_('setAutoplay', techAutoplay);\n    }\n  };\n\n  /**\n   * Set or unset the playsinline attribute.\n   * Playsinline tells the browser that non-fullscreen playback is preferred.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should try to play inline by default\n   *        - false means that we should use the browser's default playback mode,\n   *          which in most cases is inline. iOS Safari is a notable exception\n   *          and plays fullscreen by default.\n   *\n   * @return {string|Player}\n   *         - the current value of playsinline\n   *         - the player when setting\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n   */\n\n\n  Player.prototype.playsinline = function playsinline(value) {\n    if (value !== undefined) {\n      this.techCall_('setPlaysinline', value);\n      this.options_.playsinline = value;\n      return this;\n    }\n    return this.techGet_('playsinline');\n  };\n\n  /**\n   * Get or set the loop attribute on the video element.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should loop the video\n   *        - false means that we should not loop the video\n   *\n   * @return {string}\n   *         The current value of loop when getting\n   */\n\n\n  Player.prototype.loop = function loop(value) {\n    if (value !== undefined) {\n      this.techCall_('setLoop', value);\n      this.options_.loop = value;\n      return;\n    }\n    return this.techGet_('loop');\n  };\n\n  /**\n   * Get or set the poster image source url\n   *\n   * @fires Player#posterchange\n   *\n   * @param {string} [src]\n   *        Poster image source URL\n   *\n   * @return {string}\n   *         The current value of poster when getting\n   */\n\n\n  Player.prototype.poster = function poster(src) {\n    if (src === undefined) {\n      return this.poster_;\n    }\n\n    // The correct way to remove a poster is to set as an empty string\n    // other falsey values will throw errors\n    if (!src) {\n      src = '';\n    }\n\n    if (src === this.poster_) {\n      return;\n    }\n\n    // update the internal poster variable\n    this.poster_ = src;\n\n    // update the tech's poster\n    this.techCall_('setPoster', src);\n\n    this.isPosterFromTech_ = false;\n\n    // alert components that the poster has been set\n    /**\n     * This event fires when the poster image is changed on the player.\n     *\n     * @event Player#posterchange\n     * @type {EventTarget~Event}\n     */\n    this.trigger('posterchange');\n  };\n\n  /**\n   * Some techs (e.g. YouTube) can provide a poster source in an\n   * asynchronous way. We want the poster component to use this\n   * poster source so that it covers up the tech's controls.\n   * (YouTube's play button). However we only want to use this\n   * source if the player user hasn't set a poster through\n   * the normal APIs.\n   *\n   * @fires Player#posterchange\n   * @listens Tech#posterchange\n   * @private\n   */\n\n\n  Player.prototype.handleTechPosterChange_ = function handleTechPosterChange_() {\n    if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n      var newPoster = this.tech_.poster() || '';\n\n      if (newPoster !== this.poster_) {\n        this.poster_ = newPoster;\n        this.isPosterFromTech_ = true;\n\n        // Let components know the poster has changed\n        this.trigger('posterchange');\n      }\n    }\n  };\n\n  /**\n   * Get or set whether or not the controls are showing.\n   *\n   * @fires Player#controlsenabled\n   *\n   * @param {boolean} [bool]\n   *        - true to turn controls on\n   *        - false to turn controls off\n   *\n   * @return {boolean}\n   *         The current value of controls when getting\n   */\n\n\n  Player.prototype.controls = function controls(bool) {\n    if (bool === undefined) {\n      return !!this.controls_;\n    }\n\n    bool = !!bool;\n\n    // Don't trigger a change event unless it actually changed\n    if (this.controls_ === bool) {\n      return;\n    }\n\n    this.controls_ = bool;\n\n    if (this.usingNativeControls()) {\n      this.techCall_('setControls', bool);\n    }\n\n    if (this.controls_) {\n      this.removeClass('vjs-controls-disabled');\n      this.addClass('vjs-controls-enabled');\n      /**\n       * @event Player#controlsenabled\n       * @type {EventTarget~Event}\n       */\n      this.trigger('controlsenabled');\n      if (!this.usingNativeControls()) {\n        this.addTechControlsListeners_();\n      }\n    } else {\n      this.removeClass('vjs-controls-enabled');\n      this.addClass('vjs-controls-disabled');\n      /**\n       * @event Player#controlsdisabled\n       * @type {EventTarget~Event}\n       */\n      this.trigger('controlsdisabled');\n      if (!this.usingNativeControls()) {\n        this.removeTechControlsListeners_();\n      }\n    }\n  };\n\n  /**\n   * Toggle native controls on/off. Native controls are the controls built into\n   * devices (e.g. default iPhone controls), Flash, or other techs\n   * (e.g. Vimeo Controls)\n   * **This should only be set by the current tech, because only the tech knows\n   * if it can support native controls**\n   *\n   * @fires Player#usingnativecontrols\n   * @fires Player#usingcustomcontrols\n   *\n   * @param {boolean} [bool]\n   *        - true to turn native controls on\n   *        - false to turn native controls off\n   *\n   * @return {boolean}\n   *         The current value of native controls when getting\n   */\n\n\n  Player.prototype.usingNativeControls = function usingNativeControls(bool) {\n    if (bool === undefined) {\n      return !!this.usingNativeControls_;\n    }\n\n    bool = !!bool;\n\n    // Don't trigger a change event unless it actually changed\n    if (this.usingNativeControls_ === bool) {\n      return;\n    }\n\n    this.usingNativeControls_ = bool;\n\n    if (this.usingNativeControls_) {\n      this.addClass('vjs-using-native-controls');\n\n      /**\n       * player is using the native device controls\n       *\n       * @event Player#usingnativecontrols\n       * @type {EventTarget~Event}\n       */\n      this.trigger('usingnativecontrols');\n    } else {\n      this.removeClass('vjs-using-native-controls');\n\n      /**\n       * player is using the custom HTML controls\n       *\n       * @event Player#usingcustomcontrols\n       * @type {EventTarget~Event}\n       */\n      this.trigger('usingcustomcontrols');\n    }\n  };\n\n  /**\n   * Set or get the current MediaError\n   *\n   * @fires Player#error\n   *\n   * @param  {MediaError|string|number} [err]\n   *         A MediaError or a string/number to be turned\n   *         into a MediaError\n   *\n   * @return {MediaError|null}\n   *         The current MediaError when getting (or null)\n   */\n\n\n  Player.prototype.error = function error(err) {\n    if (err === undefined) {\n      return this.error_ || null;\n    }\n\n    // restoring to default\n    if (err === null) {\n      this.error_ = err;\n      this.removeClass('vjs-error');\n      if (this.errorDisplay) {\n        this.errorDisplay.close();\n      }\n      return;\n    }\n\n    this.error_ = new MediaError(err);\n\n    // add the vjs-error classname to the player\n    this.addClass('vjs-error');\n\n    // log the name of the error type and any message\n    // ie8 just logs \"[object object]\" if you just log the error object\n    log.error('(CODE:' + this.error_.code + ' ' + MediaError.errorTypes[this.error_.code] + ')', this.error_.message, this.error_);\n\n    /**\n     * @event Player#error\n     * @type {EventTarget~Event}\n     */\n    this.trigger('error');\n\n    return;\n  };\n\n  /**\n   * Report user activity\n   *\n   * @param {Object} event\n   *        Event object\n   */\n\n\n  Player.prototype.reportUserActivity = function reportUserActivity(event) {\n    this.userActivity_ = true;\n  };\n\n  /**\n   * Get/set if user is active\n   *\n   * @fires Player#useractive\n   * @fires Player#userinactive\n   *\n   * @param {boolean} [bool]\n   *        - true if the user is active\n   *        - false if the user is inactive\n   *\n   * @return {boolean}\n   *         The current value of userActive when getting\n   */\n\n\n  Player.prototype.userActive = function userActive(bool) {\n    if (bool === undefined) {\n      return this.userActive_;\n    }\n\n    bool = !!bool;\n\n    if (bool === this.userActive_) {\n      return;\n    }\n\n    this.userActive_ = bool;\n\n    if (this.userActive_) {\n      this.userActivity_ = true;\n      this.removeClass('vjs-user-inactive');\n      this.addClass('vjs-user-active');\n      /**\n       * @event Player#useractive\n       * @type {EventTarget~Event}\n       */\n      this.trigger('useractive');\n      return;\n    }\n\n    // Chrome/Safari/IE have bugs where when you change the cursor it can\n    // trigger a mousemove event. This causes an issue when you're hiding\n    // the cursor when the user is inactive, and a mousemove signals user\n    // activity. Making it impossible to go into inactive mode. Specifically\n    // this happens in fullscreen when we really need to hide the cursor.\n    //\n    // When this gets resolved in ALL browsers it can be removed\n    // https://code.google.com/p/chromium/issues/detail?id=103041\n    if (this.tech_) {\n      this.tech_.one('mousemove', function (e) {\n        e.stopPropagation();\n        e.preventDefault();\n      });\n    }\n\n    this.userActivity_ = false;\n    this.removeClass('vjs-user-active');\n    this.addClass('vjs-user-inactive');\n    /**\n     * @event Player#userinactive\n     * @type {EventTarget~Event}\n     */\n    this.trigger('userinactive');\n  };\n\n  /**\n   * Listen for user activity based on timeout value\n   *\n   * @private\n   */\n\n\n  Player.prototype.listenForUserActivity_ = function listenForUserActivity_() {\n    var mouseInProgress = void 0;\n    var lastMoveX = void 0;\n    var lastMoveY = void 0;\n    var handleActivity = bind(this, this.reportUserActivity);\n\n    var handleMouseMove = function handleMouseMove(e) {\n      // #1068 - Prevent mousemove spamming\n      // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n      if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n        lastMoveX = e.screenX;\n        lastMoveY = e.screenY;\n        handleActivity();\n      }\n    };\n\n    var handleMouseDown = function handleMouseDown() {\n      handleActivity();\n      // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n      this.clearInterval(mouseInProgress);\n      // Setting userActivity=true now and setting the interval to the same time\n      // as the activityCheck interval (250) should ensure we never miss the\n      // next activityCheck\n      mouseInProgress = this.setInterval(handleActivity, 250);\n    };\n\n    var handleMouseUp = function handleMouseUp(event) {\n      handleActivity();\n      // Stop the interval that maintains activity if the mouse/touch is down\n      this.clearInterval(mouseInProgress);\n    };\n\n    // Any mouse movement will be considered user activity\n    this.on('mousedown', handleMouseDown);\n    this.on('mousemove', handleMouseMove);\n    this.on('mouseup', handleMouseUp);\n\n    // Listen for keyboard navigation\n    // Shouldn't need to use inProgress interval because of key repeat\n    this.on('keydown', handleActivity);\n    this.on('keyup', handleActivity);\n\n    // Run an interval every 250 milliseconds instead of stuffing everything into\n    // the mousemove/touchmove function itself, to prevent performance degradation.\n    // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n    // then gets picked up by this loop\n    // http://ejohn.org/blog/learning-from-twitter/\n    var inactivityTimeout = void 0;\n\n    this.setInterval(function () {\n      // Check to see if mouse/touch activity has happened\n      if (!this.userActivity_) {\n        return;\n      }\n\n      // Reset the activity tracker\n      this.userActivity_ = false;\n\n      // If the user state was inactive, set the state to active\n      this.userActive(true);\n\n      // Clear any existing inactivity timeout to start the timer over\n      this.clearTimeout(inactivityTimeout);\n\n      var timeout = this.options_.inactivityTimeout;\n\n      if (timeout <= 0) {\n        return;\n      }\n\n      // In <timeout> milliseconds, if no more activity has occurred the\n      // user will be considered inactive\n      inactivityTimeout = this.setTimeout(function () {\n        // Protect against the case where the inactivityTimeout can trigger just\n        // before the next user activity is picked up by the activity check loop\n        // causing a flicker\n        if (!this.userActivity_) {\n          this.userActive(false);\n        }\n      }, timeout);\n    }, 250);\n  };\n\n  /**\n   * Gets or sets the current playback rate. A playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed\n   * playback, for instance.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n   *\n   * @param {number} [rate]\n   *       New playback rate to set.\n   *\n   * @return {number}\n   *         The current playback rate when getting or 1.0\n   */\n\n\n  Player.prototype.playbackRate = function playbackRate(rate) {\n    if (rate !== undefined) {\n      // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n      // that is registered above\n      this.techCall_('setPlaybackRate', rate);\n      return;\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n    }\n    return 1.0;\n  };\n\n  /**\n   * Gets or sets the current default playback rate. A default playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n   * defaultPlaybackRate will only represent what the intial playbackRate of a video was, not\n   * not the current playbackRate.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n   *\n   * @param {number} [rate]\n   *       New default playback rate to set.\n   *\n   * @return {number|Player}\n   *         - The default playback rate when getting or 1.0\n   *         - the player when setting\n   */\n\n\n  Player.prototype.defaultPlaybackRate = function defaultPlaybackRate(rate) {\n    if (rate !== undefined) {\n      return this.techCall_('setDefaultPlaybackRate', rate);\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.techGet_('defaultPlaybackRate');\n    }\n    return 1.0;\n  };\n\n  /**\n   * Gets or sets the audio flag\n   *\n   * @param {boolean} bool\n   *        - true signals that this is an audio player\n   *        - false signals that this is not an audio player\n   *\n   * @return {boolean}\n   *         The current value of isAudio when getting\n   */\n\n\n  Player.prototype.isAudio = function isAudio(bool) {\n    if (bool !== undefined) {\n      this.isAudio_ = !!bool;\n      return;\n    }\n\n    return !!this.isAudio_;\n  };\n\n  /**\n   * A helper method for adding a {@link TextTrack} to our\n   * {@link TextTrackList}.\n   *\n   * In addition to the W3C settings we allow adding additional info through options.\n   *\n   * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n   *\n   * @param {string} [kind]\n   *        the kind of TextTrack you are adding\n   *\n   * @param {string} [label]\n   *        the label to give the TextTrack label\n   *\n   * @param {string} [language]\n   *        the language to set on the TextTrack\n   *\n   * @return {TextTrack|undefined}\n   *         the TextTrack that was added or undefined\n   *         if there is no tech\n   */\n\n\n  Player.prototype.addTextTrack = function addTextTrack(kind, label, language) {\n    if (this.tech_) {\n      return this.tech_.addTextTrack(kind, label, language);\n    }\n  };\n\n  /**\n   * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}. It will\n   * automatically removed from the video element whenever the source changes, unless\n   * manualCleanup is set to false.\n   *\n   * @param {Object} options\n   *        Options to pass to {@link HTMLTrackElement} during creation. See\n   *        {@link HTMLTrackElement} for object properties that you should use.\n   *\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   *\n   * @return {HtmlTrackElement}\n   *         the HTMLTrackElement that was created and added\n   *         to the HtmlTrackElementList and the remote\n   *         TextTrackList\n   *\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   *             to \"false\" in upcoming versions of Video.js\n   */\n\n\n  Player.prototype.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    if (this.tech_) {\n      return this.tech_.addRemoteTextTrack(options, manualCleanup);\n    }\n  };\n\n  /**\n   * Remove a remote {@link TextTrack} from the respective\n   * {@link TextTrackList} and {@link HtmlTrackElementList}.\n   *\n   * @param {Object} track\n   *        Remote {@link TextTrack} to remove\n   *\n   * @return {undefined}\n   *         does not return anything\n   */\n\n\n  Player.prototype.removeRemoteTextTrack = function removeRemoteTextTrack() {\n    var _ref3 = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},\n        _ref3$track = _ref3.track,\n        track = _ref3$track === undefined ? arguments[0] : _ref3$track;\n\n    // destructure the input into an object with a track argument, defaulting to arguments[0]\n    // default the whole argument to an empty object if nothing was passed in\n\n    if (this.tech_) {\n      return this.tech_.removeRemoteTextTrack(track);\n    }\n  };\n\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object|undefined}\n   *         An object with supported media playback quality metrics or undefined if there\n   *         is no tech or the tech does not support it.\n   */\n\n\n  Player.prototype.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return this.techGet_('getVideoPlaybackQuality');\n  };\n\n  /**\n   * Get video width\n   *\n   * @return {number}\n   *         current video width\n   */\n\n\n  Player.prototype.videoWidth = function videoWidth() {\n    return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n  };\n\n  /**\n   * Get video height\n   *\n   * @return {number}\n   *         current video height\n   */\n\n\n  Player.prototype.videoHeight = function videoHeight() {\n    return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n  };\n\n  /**\n   * The player's language code\n   * NOTE: The language should be set in the player options if you want the\n   * the controls to be built with a specific language. Changing the lanugage\n   * later will not update controls text.\n   *\n   * @param {string} [code]\n   *        the language code to set the player to\n   *\n   * @return {string}\n   *         The current language code when getting\n   */\n\n\n  Player.prototype.language = function language(code) {\n    if (code === undefined) {\n      return this.language_;\n    }\n\n    this.language_ = String(code).toLowerCase();\n  };\n\n  /**\n   * Get the player's language dictionary\n   * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n   * Languages specified directly in the player options have precedence\n   *\n   * @return {Array}\n   *         An array of of supported languages\n   */\n\n\n  Player.prototype.languages = function languages() {\n    return mergeOptions(Player.prototype.options_.languages, this.languages_);\n  };\n\n  /**\n   * returns a JavaScript object reperesenting the current track\n   * information. **DOES not return it as JSON**\n   *\n   * @return {Object}\n   *         Object representing the current of track info\n   */\n\n\n  Player.prototype.toJSON = function toJSON() {\n    var options = mergeOptions(this.options_);\n    var tracks = options.tracks;\n\n    options.tracks = [];\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n\n      // deep merge tracks and null out player so no circular references\n      track = mergeOptions(track);\n      track.player = undefined;\n      options.tracks[i] = track;\n    }\n\n    return options;\n  };\n\n  /**\n   * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n   * component) that immediately overlays the player with arbitrary\n   * content and removes itself when closed.\n   *\n   * @param {string|Function|Element|Array|null} content\n   *        Same as {@link ModalDialog#content}'s param of the same name.\n   *        The most straight-forward usage is to provide a string or DOM\n   *        element.\n   *\n   * @param {Object} [options]\n   *        Extra options which will be passed on to the {@link ModalDialog}.\n   *\n   * @return {ModalDialog}\n   *         the {@link ModalDialog} that was created\n   */\n\n\n  Player.prototype.createModal = function createModal(content, options) {\n    var _this12 = this;\n\n    options = options || {};\n    options.content = content || '';\n\n    var modal = new ModalDialog(this, options);\n\n    this.addChild(modal);\n    modal.on('dispose', function () {\n      _this12.removeChild(modal);\n    });\n\n    modal.open();\n    return modal;\n  };\n\n  /**\n   * Change breakpoint classes when the player resizes.\n   *\n   * @private\n   */\n\n\n  Player.prototype.updateCurrentBreakpoint_ = function updateCurrentBreakpoint_() {\n    if (!this.responsive()) {\n      return;\n    }\n\n    var currentBreakpoint = this.currentBreakpoint();\n    var currentWidth = this.currentWidth();\n\n    for (var i = 0; i < BREAKPOINT_ORDER.length; i++) {\n      var candidateBreakpoint = BREAKPOINT_ORDER[i];\n      var maxWidth = this.breakpoints_[candidateBreakpoint];\n\n      if (currentWidth <= maxWidth) {\n\n        // The current breakpoint did not change, nothing to do.\n        if (currentBreakpoint === candidateBreakpoint) {\n          return;\n        }\n\n        // Only remove a class if there is a current breakpoint.\n        if (currentBreakpoint) {\n          this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n        }\n\n        this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n        this.breakpoint_ = candidateBreakpoint;\n        break;\n      }\n    }\n  };\n\n  /**\n   * Removes the current breakpoint.\n   *\n   * @private\n   */\n\n\n  Player.prototype.removeCurrentBreakpoint_ = function removeCurrentBreakpoint_() {\n    var className = this.currentBreakpointClass();\n\n    this.breakpoint_ = '';\n\n    if (className) {\n      this.removeClass(className);\n    }\n  };\n\n  /**\n   * Get or set breakpoints on the player.\n   *\n   * Calling this method with an object or `true` will remove any previous\n   * custom breakpoints and start from the defaults again.\n   *\n   * @param  {Object|boolean} [breakpoints]\n   *         If an object is given, it can be used to provide custom\n   *         breakpoints. If `true` is given, will set default breakpoints.\n   *         If this argument is not given, will simply return the current\n   *         breakpoints.\n   *\n   * @param  {number} [breakpoints.tiny]\n   *         The maximum width for the \"vjs-layout-tiny\" class.\n   *\n   * @param  {number} [breakpoints.xsmall]\n   *         The maximum width for the \"vjs-layout-x-small\" class.\n   *\n   * @param  {number} [breakpoints.small]\n   *         The maximum width for the \"vjs-layout-small\" class.\n   *\n   * @param  {number} [breakpoints.medium]\n   *         The maximum width for the \"vjs-layout-medium\" class.\n   *\n   * @param  {number} [breakpoints.large]\n   *         The maximum width for the \"vjs-layout-large\" class.\n   *\n   * @param  {number} [breakpoints.xlarge]\n   *         The maximum width for the \"vjs-layout-x-large\" class.\n   *\n   * @param  {number} [breakpoints.huge]\n   *         The maximum width for the \"vjs-layout-huge\" class.\n   *\n   * @return {Object}\n   *         An object mapping breakpoint names to maximum width values.\n   */\n\n\n  Player.prototype.breakpoints = function breakpoints(_breakpoints) {\n\n    // Used as a getter.\n    if (_breakpoints === undefined) {\n      return assign(this.breakpoints_);\n    }\n\n    this.breakpoint_ = '';\n    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, _breakpoints);\n\n    // When breakpoint definitions change, we need to update the currently\n    // selected breakpoint.\n    this.updateCurrentBreakpoint_();\n\n    // Clone the breakpoints before returning.\n    return assign(this.breakpoints_);\n  };\n\n  /**\n   * Get or set a flag indicating whether or not this player should adjust\n   * its UI based on its dimensions.\n   *\n   * @param  {boolean} value\n   *         Should be `true` if the player should adjust its UI based on its\n   *         dimensions; otherwise, should be `false`.\n   *\n   * @return {boolean}\n   *         Will be `true` if this player should adjust its UI based on its\n   *         dimensions; otherwise, will be `false`.\n   */\n\n\n  Player.prototype.responsive = function responsive(value) {\n\n    // Used as a getter.\n    if (value === undefined) {\n      return this.responsive_;\n    }\n\n    value = Boolean(value);\n    var current = this.responsive_;\n\n    // Nothing changed.\n    if (value === current) {\n      return;\n    }\n\n    // The value actually changed, set it.\n    this.responsive_ = value;\n\n    // Start listening for breakpoints and set the initial breakpoint if the\n    // player is now responsive.\n    if (value) {\n      this.on('playerresize', this.updateCurrentBreakpoint_);\n      this.updateCurrentBreakpoint_();\n\n      // Stop listening for breakpoints if the player is no longer responsive.\n    } else {\n      this.off('playerresize', this.updateCurrentBreakpoint_);\n      this.removeCurrentBreakpoint_();\n    }\n\n    return value;\n  };\n\n  /**\n   * Get current breakpoint name, if any.\n   *\n   * @return {string}\n   *         If there is currently a breakpoint set, returns a the key from the\n   *         breakpoints object matching it. Otherwise, returns an empty string.\n   */\n\n\n  Player.prototype.currentBreakpoint = function currentBreakpoint() {\n    return this.breakpoint_;\n  };\n\n  /**\n   * Get the current breakpoint class name.\n   *\n   * @return {string}\n   *         The matching class name (e.g. `\"vjs-layout-tiny\"` or\n   *         `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n   *         there is no current breakpoint.\n   */\n\n\n  Player.prototype.currentBreakpointClass = function currentBreakpointClass() {\n    return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n  };\n\n  /**\n   * Gets tag settings\n   *\n   * @param {Element} tag\n   *        The player tag\n   *\n   * @return {Object}\n   *         An object containing all of the settings\n   *         for a player tag\n   */\n\n\n  Player.getTagSettings = function getTagSettings(tag) {\n    var baseOptions = {\n      sources: [],\n      tracks: []\n    };\n\n    var tagOptions = getAttributes(tag);\n    var dataSetup = tagOptions['data-setup'];\n\n    if (hasClass(tag, 'vjs-fill')) {\n      tagOptions.fill = true;\n    }\n    if (hasClass(tag, 'vjs-fluid')) {\n      tagOptions.fluid = true;\n    }\n\n    // Check if data-setup attr exists.\n    if (dataSetup !== null) {\n      // Parse options JSON\n      // If empty string, make it a parsable json object.\n      var _safeParseTuple = safeParseTuple(dataSetup || '{}'),\n          err = _safeParseTuple[0],\n          data = _safeParseTuple[1];\n\n      if (err) {\n        log.error(err);\n      }\n      assign(tagOptions, data);\n    }\n\n    assign(baseOptions, tagOptions);\n\n    // Get tag children settings\n    if (tag.hasChildNodes()) {\n      var children = tag.childNodes;\n\n      for (var i = 0, j = children.length; i < j; i++) {\n        var child = children[i];\n        // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n        var childName = child.nodeName.toLowerCase();\n\n        if (childName === 'source') {\n          baseOptions.sources.push(getAttributes(child));\n        } else if (childName === 'track') {\n          baseOptions.tracks.push(getAttributes(child));\n        }\n      }\n    }\n\n    return baseOptions;\n  };\n\n  /**\n   * Determine wether or not flexbox is supported\n   *\n   * @return {boolean}\n   *         - true if flexbox is supported\n   *         - false if flexbox is not supported\n   */\n\n\n  Player.prototype.flexNotSupported_ = function flexNotSupported_() {\n    var elem = document.createElement('i');\n\n    // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more\n    // common flex features that we can rely on when checking for flex support.\n    return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style ||\n    // IE10-specific (2012 flex spec)\n    'msFlexOrder' in elem.style);\n  };\n\n  return Player;\n}(Component);\n\n/**\n * Get the {@link VideoTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n *         the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n *         the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n *         the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n/**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n *         The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n *         The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\nALL.names.forEach(function (name$$1) {\n  var props = ALL[name$$1];\n\n  Player.prototype[props.getterName] = function () {\n    if (this.tech_) {\n      return this.tech_[props.getterName]();\n    }\n\n    // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n    // these will be passed to the tech during loading\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n\n/**\n * Global player list\n *\n * @type {Object}\n */\nPlayer.players = {};\n\nvar navigator = window.navigator;\n\n/*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\nPlayer.prototype.options_ = {\n  // Default order of fallback technology\n  techOrder: Tech.defaultTechOrder_,\n\n  html5: {},\n  flash: {},\n\n  // default inactivity timeout\n  inactivityTimeout: 2000,\n\n  // default playback rates\n  playbackRates: [],\n  // Add playback rate selection by adding rates\n  // 'playbackRates': [0.5, 1, 1.5, 2],\n\n  // Included control sets\n  children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'controlBar', 'errorDisplay', 'textTrackSettings'],\n\n  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n\n  // locales and their language translations\n  languages: {},\n\n  // Default message to show when a video cannot be played.\n  notSupportedMessage: 'No compatible source was found for this media.',\n\n  breakpoints: {},\n  responsive: false\n};\n\nif (!IS_IE8) {\n  Player.prototype.options_.children.push('resizeManager');\n}\n\n[\n/**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n'ended',\n/**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n'seeking',\n/**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n'seekable',\n/**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n *   The element has not yet been initialised. All attributes are in\n *   their initial states.\n * - NETWORK_IDLE (numeric value 1)\n *   The element's resource selection algorithm is active and has\n *   selected a resource, but it is not actually using the network at\n *   this time.\n * - NETWORK_LOADING (numeric value 2)\n *   The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n *   The element's resource selection algorithm is active, but it has\n *   not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n'networkState',\n/**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n *   No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n *   Enough of the resource has been obtained that the duration of the\n *   resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n *   Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n *   Data for the immediate current playback position is available, as\n *   well as enough data for the user agent to advance the current\n *   playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n *   The user agent estimates that enough data is available for\n *   playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n'readyState'].forEach(function (fn) {\n  Player.prototype[fn] = function () {\n    return this.techGet_(fn);\n  };\n});\n\nTECH_EVENTS_RETRIGGER.forEach(function (event) {\n  Player.prototype['handleTech' + toTitleCase(event) + '_'] = function () {\n    return this.trigger(event);\n  };\n});\n\n/**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {EventTarget~Event}\n */\n\n/**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param  {string}  name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player has the requested plugin available.\n */\n\n/**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player is using the requested plugin.\n */\n\nComponent.registerComponent('Player', Player);\n\n/**\n * @file plugin.js\n */\n/**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\nvar BASE_PLUGIN_NAME = 'plugin';\n\n/**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type     {string}\n */\nvar PLUGIN_CACHE_KEY = 'activePlugins_';\n\n/**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type    {Object}\n */\nvar pluginStorage = {};\n\n/**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @returns {boolean}\n *          Whether or not the plugin has been registered.\n */\nvar pluginExists = function pluginExists(name) {\n  return pluginStorage.hasOwnProperty(name);\n};\n\n/**\n * Get a single registered plugin by name.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @returns {Function|undefined}\n *          The plugin (or undefined).\n */\nvar getPlugin = function getPlugin(name) {\n  return pluginExists(name) ? pluginStorage[name] : undefined;\n};\n\n/**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param   {Player} player\n *          A Video.js player instance.\n *\n * @param   {string} name\n *          The name of a plugin.\n */\nvar markPluginAsActive = function markPluginAsActive(player, name) {\n  player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n  player[PLUGIN_CACHE_KEY][name] = true;\n};\n\n/**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param  {Player} player\n *         A Video.js player instance.\n *\n * @param  {Plugin~PluginEventHash} hash\n *         A plugin event hash.\n *\n * @param  {Boolean} [before]\n *         If true, prefixes the event name with \"before\". In other words,\n *         use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\nvar triggerSetupEvent = function triggerSetupEvent(player, hash, before) {\n  var eventName = (before ? 'before' : '') + 'pluginsetup';\n\n  player.trigger(eventName, hash);\n  player.trigger(eventName + ':' + hash.name, hash);\n};\n\n/**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Function} plugin\n *          The basic plugin.\n *\n * @returns {Function}\n *          A wrapper function for the given plugin.\n */\nvar createBasicPlugin = function createBasicPlugin(name, plugin) {\n  var basicPluginWrapper = function basicPluginWrapper() {\n\n    // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n    // regardless, but we want the hash to be consistent with the hash provided\n    // for advanced plugins.\n    //\n    // The only potentially counter-intuitive thing here is the `instance` in\n    // the \"pluginsetup\" event is the value returned by the `plugin` function.\n    triggerSetupEvent(this, { name: name, plugin: plugin, instance: null }, true);\n\n    var instance = plugin.apply(this, arguments);\n\n    markPluginAsActive(this, name);\n    triggerSetupEvent(this, { name: name, plugin: plugin, instance: instance });\n\n    return instance;\n  };\n\n  Object.keys(plugin).forEach(function (prop) {\n    basicPluginWrapper[prop] = plugin[prop];\n  });\n\n  return basicPluginWrapper;\n};\n\n/**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Plugin} PluginSubClass\n *          The advanced plugin.\n *\n * @returns {Function}\n */\nvar createPluginFactory = function createPluginFactory(name, PluginSubClass) {\n\n  // Add a `name` property to the plugin prototype so that each plugin can\n  // refer to itself by name.\n  PluginSubClass.prototype.name = name;\n\n  return function () {\n    triggerSetupEvent(this, { name: name, plugin: PluginSubClass, instance: null }, true);\n\n    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var instance = new (Function.prototype.bind.apply(PluginSubClass, [null].concat([this].concat(args))))();\n\n    // The plugin is replaced by a function that returns the current instance.\n    this[name] = function () {\n      return instance;\n    };\n\n    triggerSetupEvent(this, instance.getEventHash());\n\n    return instance;\n  };\n};\n\n/**\n * Parent class for all advanced plugins.\n *\n * @mixes   module:evented~EventedMixin\n * @mixes   module:stateful~StatefulMixin\n * @fires   Player#beforepluginsetup\n * @fires   Player#beforepluginsetup:$name\n * @fires   Player#pluginsetup\n * @fires   Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws  {Error}\n *          If attempting to instantiate the base {@link Plugin} class\n *          directly instead of via a sub-class.\n */\n\nvar Plugin = function () {\n\n  /**\n   * Creates an instance of this class.\n   *\n   * Sub-classes should call `super` to ensure plugins are properly initialized.\n   *\n   * @param {Player} player\n   *        A Video.js player instance.\n   */\n  function Plugin(player) {\n    classCallCheck(this, Plugin);\n\n    if (this.constructor === Plugin) {\n      throw new Error('Plugin must be sub-classed; not directly instantiated.');\n    }\n\n    this.player = player;\n\n    // Make this object evented, but remove the added `trigger` method so we\n    // use the prototype version instead.\n    evented(this);\n    delete this.trigger;\n\n    stateful(this, this.constructor.defaultState);\n    markPluginAsActive(player, this.name);\n\n    // Auto-bind the dispose method so we can use it as a listener and unbind\n    // it later easily.\n    this.dispose = bind(this, this.dispose);\n\n    // If the player is disposed, dispose the plugin.\n    player.on('dispose', this.dispose);\n  }\n\n  /**\n   * Get the version of the plugin that was set on <pluginName>.VERSION\n   */\n\n\n  Plugin.prototype.version = function version() {\n    return this.constructor.VERSION;\n  };\n\n  /**\n   * Each event triggered by plugins includes a hash of additional data with\n   * conventional properties.\n   *\n   * This returns that object or mutates an existing hash.\n   *\n   * @param   {Object} [hash={}]\n   *          An object to be used as event an event hash.\n   *\n   * @returns {Plugin~PluginEventHash}\n   *          An event hash object with provided properties mixed-in.\n   */\n\n\n  Plugin.prototype.getEventHash = function getEventHash() {\n    var hash = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n\n    hash.name = this.name;\n    hash.plugin = this.constructor;\n    hash.instance = this;\n    return hash;\n  };\n\n  /**\n   * Triggers an event on the plugin object and overrides\n   * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash={}]\n   *          Additional data hash to merge with a\n   *          {@link Plugin~PluginEventHash|PluginEventHash}.\n   *\n   * @returns {boolean}\n   *          Whether or not default was prevented.\n   */\n\n\n  Plugin.prototype.trigger = function trigger$$1(event) {\n    var hash = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n    return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n  };\n\n  /**\n   * Handles \"statechanged\" events on the plugin. No-op by default, override by\n   * subclassing.\n   *\n   * @abstract\n   * @param    {Event} e\n   *           An event object provided by a \"statechanged\" event.\n   *\n   * @param    {Object} e.changes\n   *           An object describing changes that occurred with the \"statechanged\"\n   *           event.\n   */\n\n\n  Plugin.prototype.handleStateChanged = function handleStateChanged(e) {};\n\n  /**\n   * Disposes a plugin.\n   *\n   * Subclasses can override this if they want, but for the sake of safety,\n   * it's probably best to subscribe the \"dispose\" event.\n   *\n   * @fires Plugin#dispose\n   */\n\n\n  Plugin.prototype.dispose = function dispose() {\n    var name = this.name,\n        player = this.player;\n\n    /**\n     * Signals that a advanced plugin is about to be disposed.\n     *\n     * @event Plugin#dispose\n     * @type  {EventTarget~Event}\n     */\n\n    this.trigger('dispose');\n    this.off();\n    player.off('dispose', this.dispose);\n\n    // Eliminate any possible sources of leaking memory by clearing up\n    // references between the player and the plugin instance and nulling out\n    // the plugin's state and replacing methods with a function that throws.\n    player[PLUGIN_CACHE_KEY][name] = false;\n    this.player = this.state = null;\n\n    // Finally, replace the plugin name on the player with a new factory\n    // function, so that the plugin is ready to be set up again.\n    player[name] = createPluginFactory(name, pluginStorage[name]);\n  };\n\n  /**\n   * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n   *\n   * @param   {string|Function} plugin\n   *          If a string, matches the name of a plugin. If a function, will be\n   *          tested directly.\n   *\n   * @returns {boolean}\n   *          Whether or not a plugin is a basic plugin.\n   */\n\n\n  Plugin.isBasic = function isBasic(plugin) {\n    var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n\n    return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n  };\n\n  /**\n   * Register a Video.js plugin.\n   *\n   * @param   {string} name\n   *          The name of the plugin to be registered. Must be a string and\n   *          must not match an existing plugin or a method on the `Player`\n   *          prototype.\n   *\n   * @param   {Function} plugin\n   *          A sub-class of `Plugin` or a function for basic plugins.\n   *\n   * @returns {Function}\n   *          For advanced plugins, a factory function for that plugin. For\n   *          basic plugins, a wrapper function that initializes the plugin.\n   */\n\n\n  Plugin.registerPlugin = function registerPlugin(name, plugin) {\n    if (typeof name !== 'string') {\n      throw new Error('Illegal plugin name, \"' + name + '\", must be a string, was ' + (typeof name === 'undefined' ? 'undefined' : _typeof(name)) + '.');\n    }\n\n    if (pluginExists(name)) {\n      log.warn('A plugin named \"' + name + '\" already exists. You may want to avoid re-registering plugins!');\n    } else if (Player.prototype.hasOwnProperty(name)) {\n      throw new Error('Illegal plugin name, \"' + name + '\", cannot share a name with an existing player method!');\n    }\n\n    if (typeof plugin !== 'function') {\n      throw new Error('Illegal plugin for \"' + name + '\", must be a function, was ' + (typeof plugin === 'undefined' ? 'undefined' : _typeof(plugin)) + '.');\n    }\n\n    pluginStorage[name] = plugin;\n\n    // Add a player prototype method for all sub-classed plugins (but not for\n    // the base Plugin class).\n    if (name !== BASE_PLUGIN_NAME) {\n      if (Plugin.isBasic(plugin)) {\n        Player.prototype[name] = createBasicPlugin(name, plugin);\n      } else {\n        Player.prototype[name] = createPluginFactory(name, plugin);\n      }\n    }\n\n    return plugin;\n  };\n\n  /**\n   * De-register a Video.js plugin.\n   *\n   * @param {string} name\n   *        The name of the plugin to be deregistered.\n   */\n\n\n  Plugin.deregisterPlugin = function deregisterPlugin(name) {\n    if (name === BASE_PLUGIN_NAME) {\n      throw new Error('Cannot de-register base plugin.');\n    }\n    if (pluginExists(name)) {\n      delete pluginStorage[name];\n      delete Player.prototype[name];\n    }\n  };\n\n  /**\n   * Gets an object containing multiple Video.js plugins.\n   *\n   * @param   {Array} [names]\n   *          If provided, should be an array of plugin names. Defaults to _all_\n   *          plugin names.\n   *\n   * @returns {Object|undefined}\n   *          An object containing plugin(s) associated with their name(s) or\n   *          `undefined` if no matching plugins exist).\n   */\n\n\n  Plugin.getPlugins = function getPlugins() {\n    var names = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : Object.keys(pluginStorage);\n\n    var result = void 0;\n\n    names.forEach(function (name) {\n      var plugin = getPlugin(name);\n\n      if (plugin) {\n        result = result || {};\n        result[name] = plugin;\n      }\n    });\n\n    return result;\n  };\n\n  /**\n   * Gets a plugin's version, if available\n   *\n   * @param   {string} name\n   *          The name of a plugin.\n   *\n   * @returns {string}\n   *          The plugin's version or an empty string.\n   */\n\n\n  Plugin.getPluginVersion = function getPluginVersion(name) {\n    var plugin = getPlugin(name);\n\n    return plugin && plugin.VERSION || '';\n  };\n\n  return Plugin;\n}();\n\n/**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method   getPlugin\n * @memberOf Plugin\n * @param    {string} name\n *           The name of a plugin.\n *\n * @returns  {Function|undefined}\n *           The plugin (or `undefined`).\n */\n\n\nPlugin.getPlugin = getPlugin;\n\n/**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\nPlugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\n\nPlugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n\n/**\n * Documented in player.js\n *\n * @ignore\n */\nPlayer.prototype.usingPlugin = function (name) {\n  return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n};\n\n/**\n * Documented in player.js\n *\n * @ignore\n */\nPlayer.prototype.hasPlugin = function (name) {\n  return !!pluginExists(name);\n};\n\n/**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event    Player#beforepluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#beforepluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player.\n *\n * @event    Player#pluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#pluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * @typedef  {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n *           For basic plugins, the return value of the plugin function. For\n *           advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n *           The name of the plugin.\n *\n * @property {string} plugin\n *           For basic plugins, the plugin function. For advanced plugins, the\n *           plugin class/constructor.\n */\n\n/**\n * @file extend.js\n * @module extend\n */\n\n/**\n * A combination of node inherits and babel's inherits (after transpile).\n * Both work the same but node adds `super_` to the subClass\n * and Bable adds the superClass as __proto__. Both seem useful.\n *\n * @param {Object} subClass\n *        The class to inherit to\n *\n * @param {Object} superClass\n *        The class to inherit from\n *\n * @private\n */\nvar _inherits = function _inherits(subClass, superClass) {\n  if (typeof superClass !== 'function' && superClass !== null) {\n    throw new TypeError('Super expression must either be null or a function, not ' + (typeof superClass === 'undefined' ? 'undefined' : _typeof(superClass)));\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n\n  if (superClass) {\n    // node\n    subClass.super_ = superClass;\n  }\n};\n\n/**\n * Function for subclassing using the same inheritance that\n * videojs uses internally\n *\n * @static\n * @const\n *\n * @param {Object} superClass\n *        The class to inherit from\n *\n * @param {Object} [subClassMethods={}]\n *        The class to inherit to\n *\n * @return {Object}\n *         The new object with subClassMethods that inherited superClass.\n */\nvar extendFn = function extendFn(superClass) {\n  var subClassMethods = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n\n  var subClass = function subClass() {\n    superClass.apply(this, arguments);\n  };\n\n  var methods = {};\n\n  if ((typeof subClassMethods === 'undefined' ? 'undefined' : _typeof(subClassMethods)) === 'object') {\n    if (subClassMethods.constructor !== Object.prototype.constructor) {\n      subClass = subClassMethods.constructor;\n    }\n    methods = subClassMethods;\n  } else if (typeof subClassMethods === 'function') {\n    subClass = subClassMethods;\n  }\n\n  _inherits(subClass, superClass);\n\n  // Extend subObj's prototype with functions and other properties from props\n  for (var name in methods) {\n    if (methods.hasOwnProperty(name)) {\n      subClass.prototype[name] = methods[name];\n    }\n  }\n\n  return subClass;\n};\n\n/**\n * @file video.js\n * @module videojs\n */\n// Include the built-in techs\n// HTML5 Element Shim for IE8\nif (typeof HTMLVideoElement === 'undefined' && isReal()) {\n  document.createElement('video');\n  document.createElement('audio');\n  document.createElement('track');\n  document.createElement('video-js');\n}\n\n/**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @param   {string} id\n *          A string, maybe with a leading `#`.\n *\n * @returns {string}\n *          The string, without any leading `#`.\n */\nvar normalizeId = function normalizeId(id) {\n  return id.indexOf('#') === 0 ? id.slice(1) : id;\n};\n\n/**\n * Doubles as the main function for users to create a player instance and also\n * the main library object.\n * The `videojs` function can be used to initialize or retrieve a player.\n  *\n * @param {string|Element} id\n *        Video element or video element ID\n *\n * @param {Object} [options]\n *        Optional options object for config/settings\n *\n * @param {Component~ReadyCallback} [ready]\n *        Optional ready callback\n *\n * @return {Player}\n *         A player instance\n */\nfunction videojs(id, options, ready) {\n  var player = videojs.getPlayer(id);\n\n  if (player) {\n    if (options) {\n      log.warn('Player \"' + id + '\" is already initialised. Options will not be applied.');\n    }\n    if (ready) {\n      player.ready(ready);\n    }\n    return player;\n  }\n\n  var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n\n  if (!isEl(el)) {\n    throw new TypeError('The element or ID supplied is not valid. (videojs)');\n  }\n\n  if (!document.body.contains(el)) {\n    log.warn('The element supplied is not included in the DOM');\n  }\n\n  options = options || {};\n\n  videojs.hooks('beforesetup').forEach(function (hookFunction) {\n    var opts = hookFunction(el, mergeOptions(options));\n\n    if (!isObject(opts) || Array.isArray(opts)) {\n      log.error('please return an object in beforesetup hooks');\n      return;\n    }\n\n    options = mergeOptions(options, opts);\n  });\n\n  // We get the current \"Player\" component here in case an integration has\n  // replaced it with a custom player.\n  var PlayerComponent = Component.getComponent('Player');\n\n  player = new PlayerComponent(el, options, ready);\n\n  videojs.hooks('setup').forEach(function (hookFunction) {\n    return hookFunction(player);\n  });\n\n  return player;\n}\n\n/**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n */\nvideojs.hooks_ = {};\n\n/**\n * Get a list of hooks for a specific lifecycle\n * @function videojs.hooks\n *\n * @param {string} type\n *        the lifecyle to get hooks from\n *\n * @param {Function|Function[]} [fn]\n *        Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n *         an array of hooks, or an empty array if there are none.\n */\nvideojs.hooks = function (type, fn) {\n  videojs.hooks_[type] = videojs.hooks_[type] || [];\n  if (fn) {\n    videojs.hooks_[type] = videojs.hooks_[type].concat(fn);\n  }\n  return videojs.hooks_[type];\n};\n\n/**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\nvideojs.hook = function (type, fn) {\n  videojs.hooks(type, fn);\n};\n\n/**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\nvideojs.hookOnce = function (type, fn) {\n  videojs.hooks(type, [].concat(fn).map(function (original) {\n    var wrapper = function wrapper() {\n      videojs.removeHook(type, wrapper);\n      return original.apply(undefined, arguments);\n    };\n\n    return wrapper;\n  }));\n};\n\n/**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle that the function hooked to\n *\n * @param {Function} fn\n *        The hooked function to remove\n *\n * @return {boolean}\n *         The function that was removed or undef\n */\nvideojs.removeHook = function (type, fn) {\n  var index = videojs.hooks(type).indexOf(fn);\n\n  if (index <= -1) {\n    return false;\n  }\n\n  videojs.hooks_[type] = videojs.hooks_[type].slice();\n  videojs.hooks_[type].splice(index, 1);\n\n  return true;\n};\n\n// Add default styles\nif (window.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n  var style = $('.vjs-styles-defaults');\n\n  if (!style) {\n    style = createStyleElement('vjs-styles-defaults');\n    var head = $('head');\n\n    if (head) {\n      head.insertBefore(style, head.firstChild);\n    }\n    setTextContent(style, '\\n      .video-js {\\n        width: 300px;\\n        height: 150px;\\n      }\\n\\n      .vjs-fluid {\\n        padding-top: 56.25%\\n      }\\n    ');\n  }\n}\n\n// Run Auto-load players\n// You have to wait at least once in case this script is loaded after your\n// video in the DOM (weird behavior only with minified version)\nautoSetupTimeout(1, videojs);\n\n/**\n * Current software version. Follows semver.\n *\n * @type {string}\n */\nvideojs.VERSION = version;\n\n/**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\nvideojs.options = Player.prototype.options_;\n\n/**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n *         The created players\n */\nvideojs.getPlayers = function () {\n  return Player.players;\n};\n\n/**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param   {string|Element} id\n *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n *          or a string matching the `id` of such an element.\n *\n * @returns {Player|undefined}\n *          A player instance or `undefined` if there is no player instance\n *          matching the argument.\n */\nvideojs.getPlayer = function (id) {\n  var players = Player.players;\n  var tag = void 0;\n\n  if (typeof id === 'string') {\n    var nId = normalizeId(id);\n    var player = players[nId];\n\n    if (player) {\n      return player;\n    }\n\n    tag = $('#' + nId);\n  } else {\n    tag = id;\n  }\n\n  if (isEl(tag)) {\n    var _tag = tag,\n        _player = _tag.player,\n        playerId = _tag.playerId;\n\n    // Element may have a `player` property referring to an already created\n    // player instance. If so, return that.\n\n    if (_player || players[playerId]) {\n      return _player || players[playerId];\n    }\n  }\n};\n\n/**\n * Returns an array of all current players.\n *\n * @return {Array}\n *         An array of all players. The array will be in the order that\n *         `Object.keys` provides, which could potentially vary between\n *         JavaScript engines.\n *\n */\nvideojs.getAllPlayers = function () {\n  return (\n\n    // Disposed players leave a key with a `null` value, so we need to make sure\n    // we filter those out.\n    Object.keys(Player.players).map(function (k) {\n      return Player.players[k];\n    }).filter(Boolean)\n  );\n};\n\n/**\n * Expose players object.\n *\n * @memberOf videojs\n * @property {Object} players\n */\nvideojs.players = Player.players;\n\n/**\n * Get a component class object by name\n *\n * @borrows Component.getComponent as videojs.getComponent\n */\nvideojs.getComponent = Component.getComponent;\n\n/**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options  `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n *        The class name of the component\n *\n * @param {Component} comp\n *        The component class\n *\n * @return {Component}\n *         The newly registered component\n */\nvideojs.registerComponent = function (name$$1, comp) {\n  if (Tech.isTech(comp)) {\n    log.warn('The ' + name$$1 + ' tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)');\n  }\n\n  Component.registerComponent.call(Component, name$$1, comp);\n};\n\n/**\n * Get a Tech class object by name\n *\n * @borrows Tech.getTech as videojs.getTech\n */\nvideojs.getTech = Tech.getTech;\n\n/**\n * Register a Tech so it can referred to by name.\n * This is used in the tech order for the player.\n *\n * @borrows Tech.registerTech as videojs.registerTech\n */\nvideojs.registerTech = Tech.registerTech;\n\n/**\n * Register a middleware to a source type.\n *\n * @param {String} type A string representing a MIME type.\n * @param {function(player):object} middleware A middleware factory that takes a player.\n */\nvideojs.use = use;\n\n/**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @memberOf {videojs}\n * @property {object} middleware.TERMINATOR\n */\n// Object.defineProperty is not available in IE8\nif (!IS_IE8 && Object.defineProperty) {\n  Object.defineProperty(videojs, 'middleware', {\n    value: {},\n    writeable: false,\n    enumerable: true\n  });\n\n  Object.defineProperty(videojs.middleware, 'TERMINATOR', {\n    value: TERMINATOR,\n    writeable: false,\n    enumerable: true\n  });\n} else {\n  videojs.middleware = { TERMINATOR: TERMINATOR };\n}\n\n/**\n * A suite of browser and device tests from {@link browser}.\n *\n * @type {Object}\n * @private\n */\nvideojs.browser = browser;\n\n/**\n * Whether or not the browser supports touch events. Included for backward\n * compatibility with 4.x, but deprecated. Use `videojs.browser.TOUCH_ENABLED`\n * instead going forward.\n *\n * @deprecated since version 5.0\n * @type {boolean}\n */\nvideojs.TOUCH_ENABLED = TOUCH_ENABLED;\n\n/**\n * Subclass an existing class\n * Mimics ES6 subclassing with the `extend` keyword\n *\n * @borrows extend:extendFn as videojs.extend\n */\nvideojs.extend = extendFn;\n\n/**\n * Merge two options objects recursively\n * Performs a deep merge like lodash.merge but **only merges plain objects**\n * (not arrays, elements, anything else)\n * Other values will be copied directly from the second object.\n *\n * @borrows merge-options:mergeOptions as videojs.mergeOptions\n */\nvideojs.mergeOptions = mergeOptions;\n\n/**\n * Change the context (this) of a function\n *\n * > NOTE: as of v5.0 we require an ES5 shim, so you should use the native\n * `function() {}.bind(newContext);` instead of this.\n *\n * @borrows fn:bind as videojs.bind\n */\nvideojs.bind = bind;\n\n/**\n * Register a Video.js plugin.\n *\n * @borrows plugin:registerPlugin as videojs.registerPlugin\n * @method registerPlugin\n *\n * @param  {string} name\n *         The name of the plugin to be registered. Must be a string and\n *         must not match an existing plugin or a method on the `Player`\n *         prototype.\n *\n * @param  {Function} plugin\n *         A sub-class of `Plugin` or a function for basic plugins.\n *\n * @return {Function}\n *         For advanced plugins, a factory function for that plugin. For\n *         basic plugins, a wrapper function that initializes the plugin.\n */\nvideojs.registerPlugin = Plugin.registerPlugin;\n\n/**\n * Deregister a Video.js plugin.\n *\n * @borrows plugin:deregisterPlugin as videojs.deregisterPlugin\n * @method deregisterPlugin\n *\n * @param  {string} name\n *         The name of the plugin to be deregistered. Must be a string and\n *         must match an existing plugin or a method on the `Player`\n *         prototype.\n *\n */\nvideojs.deregisterPlugin = Plugin.deregisterPlugin;\n\n/**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated\n *        videojs.plugin() is deprecated; use videojs.registerPlugin() instead\n *\n * @param {string} name\n *        The plugin name\n *\n * @param {Plugin|Function} plugin\n *         The plugin sub-class or function\n */\nvideojs.plugin = function (name$$1, plugin) {\n  log.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n  return Plugin.registerPlugin(name$$1, plugin);\n};\n\n/**\n * Gets an object containing multiple Video.js plugins.\n *\n * @param  {Array} [names]\n *         If provided, should be an array of plugin names. Defaults to _all_\n *         plugin names.\n *\n * @return {Object|undefined}\n *         An object containing plugin(s) associated with their name(s) or\n *         `undefined` if no matching plugins exist).\n */\nvideojs.getPlugins = Plugin.getPlugins;\n\n/**\n * Gets a plugin by name if it exists.\n *\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {Function|undefined}\n *         The plugin (or `undefined`).\n */\nvideojs.getPlugin = Plugin.getPlugin;\n\n/**\n * Gets a plugin's version, if available\n *\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {string}\n *         The plugin's version or an empty string.\n */\nvideojs.getPluginVersion = Plugin.getPluginVersion;\n\n/**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n *        The language code or dictionary property\n *\n * @param {Object} data\n *        The data values to be translated\n *\n * @return {Object}\n *         The resulting language dictionary object\n */\nvideojs.addLanguage = function (code, data) {\n  var _mergeOptions;\n\n  code = ('' + code).toLowerCase();\n\n  videojs.options.languages = mergeOptions(videojs.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));\n\n  return videojs.options.languages[code];\n};\n\n/**\n * Log messages\n *\n * @borrows log:log as videojs.log\n */\nvideojs.log = log;\nvideojs.createLogger = createLogger;\n\n/**\n * Creates an emulated TimeRange object.\n *\n * @borrows time-ranges:createTimeRanges as videojs.createTimeRange\n */\n/**\n * @borrows time-ranges:createTimeRanges as videojs.createTimeRanges\n */\nvideojs.createTimeRange = videojs.createTimeRanges = createTimeRanges;\n\n/**\n * Format seconds as a time string, H:MM:SS or M:SS\n * Supplying a guide (in seconds) will force a number of leading zeros\n * to cover the length of the guide\n *\n * @borrows format-time:formatTime as videojs.formatTime\n */\nvideojs.formatTime = formatTime;\n\n/**\n * Replaces format-time with a custom implementation, to be used in place of the default.\n *\n * @borrows format-time:setFormatTime as videojs.setFormatTime\n *\n * @method setFormatTime\n *\n * @param {Function} customFn\n *        A custom format-time function which will be called with the current time and guide (in seconds) as arguments.\n *        Passed fn should return a string.\n */\nvideojs.setFormatTime = setFormatTime;\n\n/**\n * Resets format-time to the default implementation.\n *\n * @borrows format-time:resetFormatTime as videojs.resetFormatTime\n *\n * @method resetFormatTime\n */\nvideojs.resetFormatTime = resetFormatTime;\n\n/**\n * Resolve and parse the elements of a URL\n *\n * @borrows url:parseUrl as videojs.parseUrl\n *\n */\nvideojs.parseUrl = parseUrl;\n\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @borrows url:isCrossOrigin as videojs.isCrossOrigin\n */\nvideojs.isCrossOrigin = isCrossOrigin;\n\n/**\n * Event target class.\n *\n * @borrows EventTarget as videojs.EventTarget\n */\nvideojs.EventTarget = EventTarget;\n\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @borrows events:on as videojs.on\n */\nvideojs.on = on;\n\n/**\n * Trigger a listener only once for an event\n *\n * @borrows events:one as videojs.one\n */\nvideojs.one = one;\n\n/**\n * Removes event listeners from an element\n *\n * @borrows events:off as videojs.off\n */\nvideojs.off = off;\n\n/**\n * Trigger an event for an element\n *\n * @borrows events:trigger as videojs.trigger\n */\nvideojs.trigger = trigger;\n\n/**\n * A cross-browser XMLHttpRequest wrapper. Here's a simple example:\n *\n * @param {Object} options\n *        settings for the request.\n *\n * @return {XMLHttpRequest|XDomainRequest}\n *         The request object.\n *\n * @see https://github.com/Raynos/xhr\n */\nvideojs.xhr = xhr;\n\n/**\n * TextTrack class\n *\n * @borrows TextTrack as videojs.TextTrack\n */\nvideojs.TextTrack = TextTrack;\n\n/**\n * export the AudioTrack class so that source handlers can create\n * AudioTracks and then add them to the players AudioTrackList\n *\n * @borrows AudioTrack as videojs.AudioTrack\n */\nvideojs.AudioTrack = AudioTrack;\n\n/**\n * export the VideoTrack class so that source handlers can create\n * VideoTracks and then add them to the players VideoTrackList\n *\n * @borrows VideoTrack as videojs.VideoTrack\n */\nvideojs.VideoTrack = VideoTrack;\n\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @borrows dom:isEl as videojs.isEl\n * @deprecated Use videojs.dom.isEl() instead\n */\n\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @borrows dom:isTextNode as videojs.isTextNode\n * @deprecated Use videojs.dom.isTextNode() instead\n */\n\n/**\n * Creates an element and applies properties.\n *\n * @borrows dom:createEl as videojs.createEl\n * @deprecated Use videojs.dom.createEl() instead\n */\n\n/**\n * Check if an element has a CSS class\n *\n * @borrows dom:hasElClass as videojs.hasClass\n * @deprecated Use videojs.dom.hasClass() instead\n */\n\n/**\n * Add a CSS class name to an element\n *\n * @borrows dom:addElClass as videojs.addClass\n * @deprecated Use videojs.dom.addClass() instead\n */\n\n/**\n * Remove a CSS class name from an element\n *\n * @borrows dom:removeElClass as videojs.removeClass\n * @deprecated Use videojs.dom.removeClass() instead\n */\n\n/**\n * Adds or removes a CSS class name on an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @borrows dom:toggleElClass as videojs.toggleClass\n * @deprecated Use videojs.dom.toggleClass() instead\n */\n\n/**\n * Apply attributes to an HTML element.\n *\n * @borrows dom:setElAttributes as videojs.setAttribute\n * @deprecated Use videojs.dom.setAttributes() instead\n */\n\n/**\n * Get an element's attribute values, as defined on the HTML tag\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute (which shouldn't be used with HTML)\n * This will return true or false for boolean attributes.\n *\n * @borrows dom:getElAttributes as videojs.getAttributes\n * @deprecated Use videojs.dom.getAttributes() instead\n */\n\n/**\n * Empties the contents of an element.\n *\n * @borrows dom:emptyEl as videojs.emptyEl\n * @deprecated Use videojs.dom.emptyEl() instead\n */\n\n/**\n * Normalizes and appends content to an element.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * - String\n *   Normalized into a text node.\n *\n * - Element, TextNode\n *   Passed through.\n *\n * - Array\n *   A one-dimensional array of strings, elements, nodes, or functions (which\n *   return single strings, elements, or nodes).\n *\n * - Function\n *   If the sole argument, is expected to produce a string, element,\n *   node, or array.\n *\n * @borrows dom:appendContents as videojs.appendContet\n * @deprecated Use videojs.dom.appendContent() instead\n */\n\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * - String\n *   Normalized into a text node.\n *\n * - Element, TextNode\n *   Passed through.\n *\n * - Array\n *   A one-dimensional array of strings, elements, nodes, or functions (which\n *   return single strings, elements, or nodes).\n *\n * - Function\n *   If the sole argument, is expected to produce a string, element,\n *   node, or array.\n *\n * @borrows dom:insertContent as videojs.insertContent\n * @deprecated Use videojs.dom.insertContent() instead\n */\n['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {\n  videojs[k] = function () {\n    log.warn('videojs.' + k + '() is deprecated; use videojs.dom.' + k + '() instead');\n    return Dom[k].apply(null, arguments);\n  };\n});\n\n/**\n * A safe getComputedStyle with an IE8 fallback.\n *\n * This is because in Firefox, if the player is loaded in an iframe with `display:none`,\n * then `getComputedStyle` returns `null`, so, we do a null-check to make sure\n * that the player doesn't break in these cases.\n * See https://bugzilla.mozilla.org/show_bug.cgi?id=548397 for more details.\n *\n * @borrows computed-style:computedStyle as videojs.computedStyle\n */\nvideojs.computedStyle = computedStyle;\n\n/**\n * Export the Dom utilities for use in external plugins\n * and Tech's\n */\nvideojs.dom = Dom;\n\n/**\n * Export the Url utilities for use in external plugins\n * and Tech's\n */\nvideojs.url = Url;\n\nmodule.exports = videojs;\n","var wellKnownSymbol = require('../internals/well-known-symbol');\n\nexports.f = wellKnownSymbol;\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./x64-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./x64-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t(function (Math) {\n\t    // Shortcuts\n\t    var C = CryptoJS;\n\t    var C_lib = C.lib;\n\t    var WordArray = C_lib.WordArray;\n\t    var Hasher = C_lib.Hasher;\n\t    var C_x64 = C.x64;\n\t    var X64Word = C_x64.Word;\n\t    var C_algo = C.algo;\n\n\t    // Constants tables\n\t    var RHO_OFFSETS = [];\n\t    var PI_INDEXES  = [];\n\t    var ROUND_CONSTANTS = [];\n\n\t    // Compute Constants\n\t    (function () {\n\t        // Compute rho offset constants\n\t        var x = 1, y = 0;\n\t        for (var t = 0; t < 24; t++) {\n\t            RHO_OFFSETS[x + 5 * y] = ((t + 1) * (t + 2) / 2) % 64;\n\n\t            var newX = y % 5;\n\t            var newY = (2 * x + 3 * y) % 5;\n\t            x = newX;\n\t            y = newY;\n\t        }\n\n\t        // Compute pi index constants\n\t        for (var x = 0; x < 5; x++) {\n\t            for (var y = 0; y < 5; y++) {\n\t                PI_INDEXES[x + 5 * y] = y + ((2 * x + 3 * y) % 5) * 5;\n\t            }\n\t        }\n\n\t        // Compute round constants\n\t        var LFSR = 0x01;\n\t        for (var i = 0; i < 24; i++) {\n\t            var roundConstantMsw = 0;\n\t            var roundConstantLsw = 0;\n\n\t            for (var j = 0; j < 7; j++) {\n\t                if (LFSR & 0x01) {\n\t                    var bitPosition = (1 << j) - 1;\n\t                    if (bitPosition < 32) {\n\t                        roundConstantLsw ^= 1 << bitPosition;\n\t                    } else /* if (bitPosition >= 32) */ {\n\t                        roundConstantMsw ^= 1 << (bitPosition - 32);\n\t                    }\n\t                }\n\n\t                // Compute next LFSR\n\t                if (LFSR & 0x80) {\n\t                    // Primitive polynomial over GF(2): x^8 + x^6 + x^5 + x^4 + 1\n\t                    LFSR = (LFSR << 1) ^ 0x71;\n\t                } else {\n\t                    LFSR <<= 1;\n\t                }\n\t            }\n\n\t            ROUND_CONSTANTS[i] = X64Word.create(roundConstantMsw, roundConstantLsw);\n\t        }\n\t    }());\n\n\t    // Reusable objects for temporary values\n\t    var T = [];\n\t    (function () {\n\t        for (var i = 0; i < 25; i++) {\n\t            T[i] = X64Word.create();\n\t        }\n\t    }());\n\n\t    /**\n\t     * SHA-3 hash algorithm.\n\t     */\n\t    var SHA3 = C_algo.SHA3 = Hasher.extend({\n\t        /**\n\t         * Configuration options.\n\t         *\n\t         * @property {number} outputLength\n\t         *   The desired number of bits in the output hash.\n\t         *   Only values permitted are: 224, 256, 384, 512.\n\t         *   Default: 512\n\t         */\n\t        cfg: Hasher.cfg.extend({\n\t            outputLength: 512\n\t        }),\n\n\t        _doReset: function () {\n\t            var state = this._state = []\n\t            for (var i = 0; i < 25; i++) {\n\t                state[i] = new X64Word.init();\n\t            }\n\n\t            this.blockSize = (1600 - 2 * this.cfg.outputLength) / 32;\n\t        },\n\n\t        _doProcessBlock: function (M, offset) {\n\t            // Shortcuts\n\t            var state = this._state;\n\t            var nBlockSizeLanes = this.blockSize / 2;\n\n\t            // Absorb\n\t            for (var i = 0; i < nBlockSizeLanes; i++) {\n\t                // Shortcuts\n\t                var M2i  = M[offset + 2 * i];\n\t                var M2i1 = M[offset + 2 * i + 1];\n\n\t                // Swap endian\n\t                M2i = (\n\t                    (((M2i << 8)  | (M2i >>> 24)) & 0x00ff00ff) |\n\t                    (((M2i << 24) | (M2i >>> 8))  & 0xff00ff00)\n\t                );\n\t                M2i1 = (\n\t                    (((M2i1 << 8)  | (M2i1 >>> 24)) & 0x00ff00ff) |\n\t                    (((M2i1 << 24) | (M2i1 >>> 8))  & 0xff00ff00)\n\t                );\n\n\t                // Absorb message into state\n\t                var lane = state[i];\n\t                lane.high ^= M2i1;\n\t                lane.low  ^= M2i;\n\t            }\n\n\t            // Rounds\n\t            for (var round = 0; round < 24; round++) {\n\t                // Theta\n\t                for (var x = 0; x < 5; x++) {\n\t                    // Mix column lanes\n\t                    var tMsw = 0, tLsw = 0;\n\t                    for (var y = 0; y < 5; y++) {\n\t                        var lane = state[x + 5 * y];\n\t                        tMsw ^= lane.high;\n\t                        tLsw ^= lane.low;\n\t                    }\n\n\t                    // Temporary values\n\t                    var Tx = T[x];\n\t                    Tx.high = tMsw;\n\t                    Tx.low  = tLsw;\n\t                }\n\t                for (var x = 0; x < 5; x++) {\n\t                    // Shortcuts\n\t                    var Tx4 = T[(x + 4) % 5];\n\t                    var Tx1 = T[(x + 1) % 5];\n\t                    var Tx1Msw = Tx1.high;\n\t                    var Tx1Lsw = Tx1.low;\n\n\t                    // Mix surrounding columns\n\t                    var tMsw = Tx4.high ^ ((Tx1Msw << 1) | (Tx1Lsw >>> 31));\n\t                    var tLsw = Tx4.low  ^ ((Tx1Lsw << 1) | (Tx1Msw >>> 31));\n\t                    for (var y = 0; y < 5; y++) {\n\t                        var lane = state[x + 5 * y];\n\t                        lane.high ^= tMsw;\n\t                        lane.low  ^= tLsw;\n\t                    }\n\t                }\n\n\t                // Rho Pi\n\t                for (var laneIndex = 1; laneIndex < 25; laneIndex++) {\n\t                    var tMsw;\n\t                    var tLsw;\n\n\t                    // Shortcuts\n\t                    var lane = state[laneIndex];\n\t                    var laneMsw = lane.high;\n\t                    var laneLsw = lane.low;\n\t                    var rhoOffset = RHO_OFFSETS[laneIndex];\n\n\t                    // Rotate lanes\n\t                    if (rhoOffset < 32) {\n\t                        tMsw = (laneMsw << rhoOffset) | (laneLsw >>> (32 - rhoOffset));\n\t                        tLsw = (laneLsw << rhoOffset) | (laneMsw >>> (32 - rhoOffset));\n\t                    } else /* if (rhoOffset >= 32) */ {\n\t                        tMsw = (laneLsw << (rhoOffset - 32)) | (laneMsw >>> (64 - rhoOffset));\n\t                        tLsw = (laneMsw << (rhoOffset - 32)) | (laneLsw >>> (64 - rhoOffset));\n\t                    }\n\n\t                    // Transpose lanes\n\t                    var TPiLane = T[PI_INDEXES[laneIndex]];\n\t                    TPiLane.high = tMsw;\n\t                    TPiLane.low  = tLsw;\n\t                }\n\n\t                // Rho pi at x = y = 0\n\t                var T0 = T[0];\n\t                var state0 = state[0];\n\t                T0.high = state0.high;\n\t                T0.low  = state0.low;\n\n\t                // Chi\n\t                for (var x = 0; x < 5; x++) {\n\t                    for (var y = 0; y < 5; y++) {\n\t                        // Shortcuts\n\t                        var laneIndex = x + 5 * y;\n\t                        var lane = state[laneIndex];\n\t                        var TLane = T[laneIndex];\n\t                        var Tx1Lane = T[((x + 1) % 5) + 5 * y];\n\t                        var Tx2Lane = T[((x + 2) % 5) + 5 * y];\n\n\t                        // Mix rows\n\t                        lane.high = TLane.high ^ (~Tx1Lane.high & Tx2Lane.high);\n\t                        lane.low  = TLane.low  ^ (~Tx1Lane.low  & Tx2Lane.low);\n\t                    }\n\t                }\n\n\t                // Iota\n\t                var lane = state[0];\n\t                var roundConstant = ROUND_CONSTANTS[round];\n\t                lane.high ^= roundConstant.high;\n\t                lane.low  ^= roundConstant.low;\n\t            }\n\t        },\n\n\t        _doFinalize: function () {\n\t            // Shortcuts\n\t            var data = this._data;\n\t            var dataWords = data.words;\n\t            var nBitsTotal = this._nDataBytes * 8;\n\t            var nBitsLeft = data.sigBytes * 8;\n\t            var blockSizeBits = this.blockSize * 32;\n\n\t            // Add padding\n\t            dataWords[nBitsLeft >>> 5] |= 0x1 << (24 - nBitsLeft % 32);\n\t            dataWords[((Math.ceil((nBitsLeft + 1) / blockSizeBits) * blockSizeBits) >>> 5) - 1] |= 0x80;\n\t            data.sigBytes = dataWords.length * 4;\n\n\t            // Hash final blocks\n\t            this._process();\n\n\t            // Shortcuts\n\t            var state = this._state;\n\t            var outputLengthBytes = this.cfg.outputLength / 8;\n\t            var outputLengthLanes = outputLengthBytes / 8;\n\n\t            // Squeeze\n\t            var hashWords = [];\n\t            for (var i = 0; i < outputLengthLanes; i++) {\n\t                // Shortcuts\n\t                var lane = state[i];\n\t                var laneMsw = lane.high;\n\t                var laneLsw = lane.low;\n\n\t                // Swap endian\n\t                laneMsw = (\n\t                    (((laneMsw << 8)  | (laneMsw >>> 24)) & 0x00ff00ff) |\n\t                    (((laneMsw << 24) | (laneMsw >>> 8))  & 0xff00ff00)\n\t                );\n\t                laneLsw = (\n\t                    (((laneLsw << 8)  | (laneLsw >>> 24)) & 0x00ff00ff) |\n\t                    (((laneLsw << 24) | (laneLsw >>> 8))  & 0xff00ff00)\n\t                );\n\n\t                // Squeeze state to retrieve hash\n\t                hashWords.push(laneLsw);\n\t                hashWords.push(laneMsw);\n\t            }\n\n\t            // Return final computed hash\n\t            return new WordArray.init(hashWords, outputLengthBytes);\n\t        },\n\n\t        clone: function () {\n\t            var clone = Hasher.clone.call(this);\n\n\t            var state = clone._state = this._state.slice(0);\n\t            for (var i = 0; i < 25; i++) {\n\t                state[i] = state[i].clone();\n\t            }\n\n\t            return clone;\n\t        }\n\t    });\n\n\t    /**\n\t     * Shortcut function to the hasher's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     *\n\t     * @return {WordArray} The hash.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hash = CryptoJS.SHA3('message');\n\t     *     var hash = CryptoJS.SHA3(wordArray);\n\t     */\n\t    C.SHA3 = Hasher._createHelper(SHA3);\n\n\t    /**\n\t     * Shortcut function to the HMAC's object interface.\n\t     *\n\t     * @param {WordArray|string} message The message to hash.\n\t     * @param {WordArray|string} key The secret key.\n\t     *\n\t     * @return {WordArray} The HMAC.\n\t     *\n\t     * @static\n\t     *\n\t     * @example\n\t     *\n\t     *     var hmac = CryptoJS.HmacSHA3(message, key);\n\t     */\n\t    C.HmacSHA3 = Hasher._createHmacHelper(SHA3);\n\t}(Math));\n\n\n\treturn CryptoJS.SHA3;\n\n}));","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// a duplex stream is just a stream that is both readable and writable.\n// Since JS doesn't have multiple prototypal inheritance, this class\n// prototypally inherits from Readable, and then parasitically from\n// Writable.\n'use strict';\n/*<replacement>*/\n\nvar objectKeys = Object.keys || function (obj) {\n  var keys = [];\n\n  for (var key in obj) {\n    keys.push(key);\n  }\n\n  return keys;\n};\n/*</replacement>*/\n\n\nmodule.exports = Duplex;\n\nvar Readable = require('./_stream_readable');\n\nvar Writable = require('./_stream_writable');\n\nrequire('inherits')(Duplex, Readable);\n\n{\n  // Allow the keys array to be GC'ed.\n  var keys = objectKeys(Writable.prototype);\n\n  for (var v = 0; v < keys.length; v++) {\n    var method = keys[v];\n    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];\n  }\n}\n\nfunction Duplex(options) {\n  if (!(this instanceof Duplex)) return new Duplex(options);\n  Readable.call(this, options);\n  Writable.call(this, options);\n  this.allowHalfOpen = true;\n\n  if (options) {\n    if (options.readable === false) this.readable = false;\n    if (options.writable === false) this.writable = false;\n\n    if (options.allowHalfOpen === false) {\n      this.allowHalfOpen = false;\n      this.once('end', onend);\n    }\n  }\n}\n\nObject.defineProperty(Duplex.prototype, 'writableHighWaterMark', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.highWaterMark;\n  }\n});\nObject.defineProperty(Duplex.prototype, 'writableBuffer', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState && this._writableState.getBuffer();\n  }\n});\nObject.defineProperty(Duplex.prototype, 'writableLength', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    return this._writableState.length;\n  }\n}); // the no-half-open enforcer\n\nfunction onend() {\n  // If the writable side ended, then we're ok.\n  if (this._writableState.ended) return; // no more data can be written.\n  // But allow more writes to happen in this tick.\n\n  process.nextTick(onEndNT, this);\n}\n\nfunction onEndNT(self) {\n  self.end();\n}\n\nObject.defineProperty(Duplex.prototype, 'destroyed', {\n  // making it explicit this property is not enumerable\n  // because otherwise some prototype manipulation in\n  // userland will fail\n  enumerable: false,\n  get: function get() {\n    if (this._readableState === undefined || this._writableState === undefined) {\n      return false;\n    }\n\n    return this._readableState.destroyed && this._writableState.destroyed;\n  },\n  set: function set(value) {\n    // we ignore the value if the stream\n    // has not been initialized yet\n    if (this._readableState === undefined || this._writableState === undefined) {\n      return;\n    } // backward compatibility, the user is explicitly\n    // managing destroyed\n\n\n    this._readableState.destroyed = value;\n    this._writableState.destroyed = value;\n  }\n});","module.exports = function (exec) {\n  try {\n    return { error: false, value: exec() };\n  } catch (error) {\n    return { error: true, value: error };\n  }\n};\n","'use strict';\nvar $ = require('../internals/export');\nvar IS_PURE = require('../internals/is-pure');\nvar global = require('../internals/global');\nvar getBuiltIn = require('../internals/get-built-in');\nvar NativePromise = require('../internals/native-promise-constructor');\nvar redefine = require('../internals/redefine');\nvar redefineAll = require('../internals/redefine-all');\nvar setToStringTag = require('../internals/set-to-string-tag');\nvar setSpecies = require('../internals/set-species');\nvar isObject = require('../internals/is-object');\nvar aFunction = require('../internals/a-function');\nvar anInstance = require('../internals/an-instance');\nvar inspectSource = require('../internals/inspect-source');\nvar iterate = require('../internals/iterate');\nvar checkCorrectnessOfIteration = require('../internals/check-correctness-of-iteration');\nvar speciesConstructor = require('../internals/species-constructor');\nvar task = require('../internals/task').set;\nvar microtask = require('../internals/microtask');\nvar promiseResolve = require('../internals/promise-resolve');\nvar hostReportErrors = require('../internals/host-report-errors');\nvar newPromiseCapabilityModule = require('../internals/new-promise-capability');\nvar perform = require('../internals/perform');\nvar InternalStateModule = require('../internals/internal-state');\nvar isForced = require('../internals/is-forced');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar IS_NODE = require('../internals/engine-is-node');\nvar V8_VERSION = require('../internals/engine-v8-version');\n\nvar SPECIES = wellKnownSymbol('species');\nvar PROMISE = 'Promise';\nvar getInternalState = InternalStateModule.get;\nvar setInternalState = InternalStateModule.set;\nvar getInternalPromiseState = InternalStateModule.getterFor(PROMISE);\nvar PromiseConstructor = NativePromise;\nvar TypeError = global.TypeError;\nvar document = global.document;\nvar process = global.process;\nvar $fetch = getBuiltIn('fetch');\nvar newPromiseCapability = newPromiseCapabilityModule.f;\nvar newGenericPromiseCapability = newPromiseCapability;\nvar DISPATCH_EVENT = !!(document && document.createEvent && global.dispatchEvent);\nvar NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';\nvar UNHANDLED_REJECTION = 'unhandledrejection';\nvar REJECTION_HANDLED = 'rejectionhandled';\nvar PENDING = 0;\nvar FULFILLED = 1;\nvar REJECTED = 2;\nvar HANDLED = 1;\nvar UNHANDLED = 2;\nvar Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;\n\nvar FORCED = isForced(PROMISE, function () {\n  var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);\n  if (!GLOBAL_CORE_JS_PROMISE) {\n    // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables\n    // https://bugs.chromium.org/p/chromium/issues/detail?id=830565\n    // We can't detect it synchronously, so just check versions\n    if (V8_VERSION === 66) return true;\n    // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test\n    if (!IS_NODE && !NATIVE_REJECTION_EVENT) return true;\n  }\n  // We need Promise#finally in the pure version for preventing prototype pollution\n  if (IS_PURE && !PromiseConstructor.prototype['finally']) return true;\n  // We can't use @@species feature detection in V8 since it causes\n  // deoptimization and performance degradation\n  // https://github.com/zloirock/core-js/issues/679\n  if (V8_VERSION >= 51 && /native code/.test(PromiseConstructor)) return false;\n  // Detect correctness of subclassing with @@species support\n  var promise = PromiseConstructor.resolve(1);\n  var FakePromise = function (exec) {\n    exec(function () { /* empty */ }, function () { /* empty */ });\n  };\n  var constructor = promise.constructor = {};\n  constructor[SPECIES] = FakePromise;\n  return !(promise.then(function () { /* empty */ }) instanceof FakePromise);\n});\n\nvar INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {\n  PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });\n});\n\n// helpers\nvar isThenable = function (it) {\n  var then;\n  return isObject(it) && typeof (then = it.then) == 'function' ? then : false;\n};\n\nvar notify = function (state, isReject) {\n  if (state.notified) return;\n  state.notified = true;\n  var chain = state.reactions;\n  microtask(function () {\n    var value = state.value;\n    var ok = state.state == FULFILLED;\n    var index = 0;\n    // variable length - can't use forEach\n    while (chain.length > index) {\n      var reaction = chain[index++];\n      var handler = ok ? reaction.ok : reaction.fail;\n      var resolve = reaction.resolve;\n      var reject = reaction.reject;\n      var domain = reaction.domain;\n      var result, then, exited;\n      try {\n        if (handler) {\n          if (!ok) {\n            if (state.rejection === UNHANDLED) onHandleUnhandled(state);\n            state.rejection = HANDLED;\n          }\n          if (handler === true) result = value;\n          else {\n            if (domain) domain.enter();\n            result = handler(value); // can throw\n            if (domain) {\n              domain.exit();\n              exited = true;\n            }\n          }\n          if (result === reaction.promise) {\n            reject(TypeError('Promise-chain cycle'));\n          } else if (then = isThenable(result)) {\n            then.call(result, resolve, reject);\n          } else resolve(result);\n        } else reject(value);\n      } catch (error) {\n        if (domain && !exited) domain.exit();\n        reject(error);\n      }\n    }\n    state.reactions = [];\n    state.notified = false;\n    if (isReject && !state.rejection) onUnhandled(state);\n  });\n};\n\nvar dispatchEvent = function (name, promise, reason) {\n  var event, handler;\n  if (DISPATCH_EVENT) {\n    event = document.createEvent('Event');\n    event.promise = promise;\n    event.reason = reason;\n    event.initEvent(name, false, true);\n    global.dispatchEvent(event);\n  } else event = { promise: promise, reason: reason };\n  if (!NATIVE_REJECTION_EVENT && (handler = global['on' + name])) handler(event);\n  else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);\n};\n\nvar onUnhandled = function (state) {\n  task.call(global, function () {\n    var promise = state.facade;\n    var value = state.value;\n    var IS_UNHANDLED = isUnhandled(state);\n    var result;\n    if (IS_UNHANDLED) {\n      result = perform(function () {\n        if (IS_NODE) {\n          process.emit('unhandledRejection', value, promise);\n        } else dispatchEvent(UNHANDLED_REJECTION, promise, value);\n      });\n      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should\n      state.rejection = IS_NODE || isUnhandled(state) ? UNHANDLED : HANDLED;\n      if (result.error) throw result.value;\n    }\n  });\n};\n\nvar isUnhandled = function (state) {\n  return state.rejection !== HANDLED && !state.parent;\n};\n\nvar onHandleUnhandled = function (state) {\n  task.call(global, function () {\n    var promise = state.facade;\n    if (IS_NODE) {\n      process.emit('rejectionHandled', promise);\n    } else dispatchEvent(REJECTION_HANDLED, promise, state.value);\n  });\n};\n\nvar bind = function (fn, state, unwrap) {\n  return function (value) {\n    fn(state, value, unwrap);\n  };\n};\n\nvar internalReject = function (state, value, unwrap) {\n  if (state.done) return;\n  state.done = true;\n  if (unwrap) state = unwrap;\n  state.value = value;\n  state.state = REJECTED;\n  notify(state, true);\n};\n\nvar internalResolve = function (state, value, unwrap) {\n  if (state.done) return;\n  state.done = true;\n  if (unwrap) state = unwrap;\n  try {\n    if (state.facade === value) throw TypeError(\"Promise can't be resolved itself\");\n    var then = isThenable(value);\n    if (then) {\n      microtask(function () {\n        var wrapper = { done: false };\n        try {\n          then.call(value,\n            bind(internalResolve, wrapper, state),\n            bind(internalReject, wrapper, state)\n          );\n        } catch (error) {\n          internalReject(wrapper, error, state);\n        }\n      });\n    } else {\n      state.value = value;\n      state.state = FULFILLED;\n      notify(state, false);\n    }\n  } catch (error) {\n    internalReject({ done: false }, error, state);\n  }\n};\n\n// constructor polyfill\nif (FORCED) {\n  // 25.4.3.1 Promise(executor)\n  PromiseConstructor = function Promise(executor) {\n    anInstance(this, PromiseConstructor, PROMISE);\n    aFunction(executor);\n    Internal.call(this);\n    var state = getInternalState(this);\n    try {\n      executor(bind(internalResolve, state), bind(internalReject, state));\n    } catch (error) {\n      internalReject(state, error);\n    }\n  };\n  // eslint-disable-next-line no-unused-vars -- required for `.length`\n  Internal = function Promise(executor) {\n    setInternalState(this, {\n      type: PROMISE,\n      done: false,\n      notified: false,\n      parent: false,\n      reactions: [],\n      rejection: false,\n      state: PENDING,\n      value: undefined\n    });\n  };\n  Internal.prototype = redefineAll(PromiseConstructor.prototype, {\n    // `Promise.prototype.then` method\n    // https://tc39.es/ecma262/#sec-promise.prototype.then\n    then: function then(onFulfilled, onRejected) {\n      var state = getInternalPromiseState(this);\n      var reaction = newPromiseCapability(speciesConstructor(this, PromiseConstructor));\n      reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;\n      reaction.fail = typeof onRejected == 'function' && onRejected;\n      reaction.domain = IS_NODE ? process.domain : undefined;\n      state.parent = true;\n      state.reactions.push(reaction);\n      if (state.state != PENDING) notify(state, false);\n      return reaction.promise;\n    },\n    // `Promise.prototype.catch` method\n    // https://tc39.es/ecma262/#sec-promise.prototype.catch\n    'catch': function (onRejected) {\n      return this.then(undefined, onRejected);\n    }\n  });\n  OwnPromiseCapability = function () {\n    var promise = new Internal();\n    var state = getInternalState(promise);\n    this.promise = promise;\n    this.resolve = bind(internalResolve, state);\n    this.reject = bind(internalReject, state);\n  };\n  newPromiseCapabilityModule.f = newPromiseCapability = function (C) {\n    return C === PromiseConstructor || C === PromiseWrapper\n      ? new OwnPromiseCapability(C)\n      : newGenericPromiseCapability(C);\n  };\n\n  if (!IS_PURE && typeof NativePromise == 'function') {\n    nativeThen = NativePromise.prototype.then;\n\n    // wrap native Promise#then for native async functions\n    redefine(NativePromise.prototype, 'then', function then(onFulfilled, onRejected) {\n      var that = this;\n      return new PromiseConstructor(function (resolve, reject) {\n        nativeThen.call(that, resolve, reject);\n      }).then(onFulfilled, onRejected);\n    // https://github.com/zloirock/core-js/issues/640\n    }, { unsafe: true });\n\n    // wrap fetch result\n    if (typeof $fetch == 'function') $({ global: true, enumerable: true, forced: true }, {\n      // eslint-disable-next-line no-unused-vars -- required for `.length`\n      fetch: function fetch(input /* , init */) {\n        return promiseResolve(PromiseConstructor, $fetch.apply(global, arguments));\n      }\n    });\n  }\n}\n\n$({ global: true, wrap: true, forced: FORCED }, {\n  Promise: PromiseConstructor\n});\n\nsetToStringTag(PromiseConstructor, PROMISE, false, true);\nsetSpecies(PROMISE);\n\nPromiseWrapper = getBuiltIn(PROMISE);\n\n// statics\n$({ target: PROMISE, stat: true, forced: FORCED }, {\n  // `Promise.reject` method\n  // https://tc39.es/ecma262/#sec-promise.reject\n  reject: function reject(r) {\n    var capability = newPromiseCapability(this);\n    capability.reject.call(undefined, r);\n    return capability.promise;\n  }\n});\n\n$({ target: PROMISE, stat: true, forced: IS_PURE || FORCED }, {\n  // `Promise.resolve` method\n  // https://tc39.es/ecma262/#sec-promise.resolve\n  resolve: function resolve(x) {\n    return promiseResolve(IS_PURE && this === PromiseWrapper ? PromiseConstructor : this, x);\n  }\n});\n\n$({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {\n  // `Promise.all` method\n  // https://tc39.es/ecma262/#sec-promise.all\n  all: function all(iterable) {\n    var C = this;\n    var capability = newPromiseCapability(C);\n    var resolve = capability.resolve;\n    var reject = capability.reject;\n    var result = perform(function () {\n      var $promiseResolve = aFunction(C.resolve);\n      var values = [];\n      var counter = 0;\n      var remaining = 1;\n      iterate(iterable, function (promise) {\n        var index = counter++;\n        var alreadyCalled = false;\n        values.push(undefined);\n        remaining++;\n        $promiseResolve.call(C, promise).then(function (value) {\n          if (alreadyCalled) return;\n          alreadyCalled = true;\n          values[index] = value;\n          --remaining || resolve(values);\n        }, reject);\n      });\n      --remaining || resolve(values);\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  },\n  // `Promise.race` method\n  // https://tc39.es/ecma262/#sec-promise.race\n  race: function race(iterable) {\n    var C = this;\n    var capability = newPromiseCapability(C);\n    var reject = capability.reject;\n    var result = perform(function () {\n      var $promiseResolve = aFunction(C.resolve);\n      iterate(iterable, function (promise) {\n        $promiseResolve.call(C, promise).then(capability.resolve, reject);\n      });\n    });\n    if (result.error) reject(result.value);\n    return capability.promise;\n  }\n});\n","var has = require('../internals/has');\nvar ownKeys = require('../internals/own-keys');\nvar getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');\nvar definePropertyModule = require('../internals/object-define-property');\n\nmodule.exports = function (target, source) {\n  var keys = ownKeys(source);\n  var defineProperty = definePropertyModule.f;\n  var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;\n  for (var i = 0; i < keys.length; i++) {\n    var key = keys[i];\n    if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));\n  }\n};\n","var classof = require('../internals/classof-raw');\n\n// `IsArray` abstract operation\n// https://tc39.es/ecma262/#sec-isarray\n// eslint-disable-next-line es/no-array-isarray -- safe\nmodule.exports = Array.isArray || function isArray(arg) {\n  return classof(arg) == 'Array';\n};\n","var wellKnownSymbol = require('../internals/well-known-symbol');\nvar Iterators = require('../internals/iterators');\n\nvar ITERATOR = wellKnownSymbol('iterator');\nvar ArrayPrototype = Array.prototype;\n\n// check on default Array iterator\nmodule.exports = function (it) {\n  return it !== undefined && (Iterators.Array === it || ArrayPrototype[ITERATOR] === it);\n};\n","/**\n * @file stream.js\n */\n/**\n * A lightweight readable stream implemention that handles event dispatching.\n *\n * @class Stream\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar Stream = (function () {\n  function Stream() {\n    _classCallCheck(this, Stream);\n\n    this.listeners = {};\n  }\n\n  /**\n   * Add a listener for a specified event type.\n   *\n   * @param {String} type the event name\n   * @param {Function} listener the callback to be invoked when an event of\n   * the specified type occurs\n   */\n\n  _createClass(Stream, [{\n    key: 'on',\n    value: function on(type, listener) {\n      if (!this.listeners[type]) {\n        this.listeners[type] = [];\n      }\n      this.listeners[type].push(listener);\n    }\n\n    /**\n     * Remove a listener for a specified event type.\n     *\n     * @param {String} type the event name\n     * @param {Function} listener  a function previously registered for this\n     * type of event through `on`\n     * @return {Boolean} if we could turn it off or not\n     */\n  }, {\n    key: 'off',\n    value: function off(type, listener) {\n      var index = undefined;\n\n      if (!this.listeners[type]) {\n        return false;\n      }\n      index = this.listeners[type].indexOf(listener);\n      this.listeners[type].splice(index, 1);\n      return index > -1;\n    }\n\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     *\n     * @param {String} type the event name\n     */\n  }, {\n    key: 'trigger',\n    value: function trigger(type) {\n      var callbacks = undefined;\n      var i = undefined;\n      var length = undefined;\n      var args = undefined;\n\n      callbacks = this.listeners[type];\n      if (!callbacks) {\n        return;\n      }\n      // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n      if (arguments.length === 2) {\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        args = Array.prototype.slice.call(arguments, 1);\n        length = callbacks.length;\n        for (i = 0; i < length; ++i) {\n          callbacks[i].apply(this, args);\n        }\n      }\n    }\n\n    /**\n     * Destroys the stream and cleans up.\n     */\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.listeners = {};\n    }\n\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     *\n     * @param {Stream} destination the stream that will receive all `data` events\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n  }, {\n    key: 'pipe',\n    value: function pipe(destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n    }\n  }]);\n\n  return Stream;\n})();\n\nexports['default'] = Stream;\nmodule.exports = exports['default'];","var win;\n\nif (typeof window !== \"undefined\") {\n    win = window;\n} else if (typeof global !== \"undefined\") {\n    win = global;\n} else if (typeof self !== \"undefined\"){\n    win = self;\n} else {\n    win = {};\n}\n\nmodule.exports = win;\n","import getParentNode from \"./getParentNode.js\";\nimport isScrollParent from \"./isScrollParent.js\";\nimport getNodeName from \"./getNodeName.js\";\nimport { isHTMLElement } from \"./instanceOf.js\";\nexport default function getScrollParent(node) {\n  if (['html', 'body', '#document'].indexOf(getNodeName(node)) >= 0) {\n    // $FlowFixMe[incompatible-return]: assume body is always available\n    return node.ownerDocument.body;\n  }\n\n  if (isHTMLElement(node) && isScrollParent(node)) {\n    return node;\n  }\n\n  return getScrollParent(getParentNode(node));\n}","import getScrollParent from \"./getScrollParent.js\";\nimport getParentNode from \"./getParentNode.js\";\nimport getWindow from \"./getWindow.js\";\nimport isScrollParent from \"./isScrollParent.js\";\n/*\ngiven a DOM element, return the list of all scroll parents, up the list of ancesors\nuntil we get to the top window object. This list is what we attach scroll listeners\nto, because if any of these parent elements scroll, we'll need to re-calculate the\nreference element's position.\n*/\n\nexport default function listScrollParents(element, list) {\n  var _element$ownerDocumen;\n\n  if (list === void 0) {\n    list = [];\n  }\n\n  var scrollParent = getScrollParent(element);\n  var isBody = scrollParent === ((_element$ownerDocumen = element.ownerDocument) == null ? void 0 : _element$ownerDocumen.body);\n  var win = getWindow(scrollParent);\n  var target = isBody ? [win].concat(win.visualViewport || [], isScrollParent(scrollParent) ? scrollParent : []) : scrollParent;\n  var updatedList = list.concat(target);\n  return isBody ? updatedList : // $FlowFixMe[incompatible-call]: isBody tells us target will be an HTMLElement here\n  updatedList.concat(listScrollParents(getParentNode(target)));\n}","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar autoKeyword = \"auto\";\nvar directionSetting = {\n  \"\": true,\n  \"lr\": true,\n  \"rl\": true\n};\nvar alignSetting = {\n  \"start\": true,\n  \"middle\": true,\n  \"end\": true,\n  \"left\": true,\n  \"right\": true\n};\n\nfunction findDirectionSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var dir = directionSetting[value.toLowerCase()];\n  return dir ? value.toLowerCase() : false;\n}\n\nfunction findAlignSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var align = alignSetting[value.toLowerCase()];\n  return align ? value.toLowerCase() : false;\n}\n\nfunction extend(obj) {\n  var i = 1;\n  for (; i < arguments.length; i++) {\n    var cobj = arguments[i];\n    for (var p in cobj) {\n      obj[p] = cobj[p];\n    }\n  }\n\n  return obj;\n}\n\nfunction VTTCue(startTime, endTime, text) {\n  var cue = this;\n  var isIE8 = (/MSIE\\s8\\.0/).test(navigator.userAgent);\n  var baseObj = {};\n\n  if (isIE8) {\n    cue = document.createElement('custom');\n  } else {\n    baseObj.enumerable = true;\n  }\n\n  /**\n   * Shim implementation specific properties. These properties are not in\n   * the spec.\n   */\n\n  // Lets us know when the VTTCue's data has changed in such a way that we need\n  // to recompute its display state. This lets us compute its display state\n  // lazily.\n  cue.hasBeenReset = false;\n\n  /**\n   * VTTCue and TextTrackCue properties\n   * http://dev.w3.org/html5/webvtt/#vttcue-interface\n   */\n\n  var _id = \"\";\n  var _pauseOnExit = false;\n  var _startTime = startTime;\n  var _endTime = endTime;\n  var _text = text;\n  var _region = null;\n  var _vertical = \"\";\n  var _snapToLines = true;\n  var _line = \"auto\";\n  var _lineAlign = \"start\";\n  var _position = 50;\n  var _positionAlign = \"middle\";\n  var _size = 50;\n  var _align = \"middle\";\n\n  Object.defineProperty(cue,\n    \"id\", extend({}, baseObj, {\n      get: function() {\n        return _id;\n      },\n      set: function(value) {\n        _id = \"\" + value;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"pauseOnExit\", extend({}, baseObj, {\n      get: function() {\n        return _pauseOnExit;\n      },\n      set: function(value) {\n        _pauseOnExit = !!value;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"startTime\", extend({}, baseObj, {\n      get: function() {\n        return _startTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Start time must be set to a number.\");\n        }\n        _startTime = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"endTime\", extend({}, baseObj, {\n      get: function() {\n        return _endTime;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"End time must be set to a number.\");\n        }\n        _endTime = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"text\", extend({}, baseObj, {\n      get: function() {\n        return _text;\n      },\n      set: function(value) {\n        _text = \"\" + value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"region\", extend({}, baseObj, {\n      get: function() {\n        return _region;\n      },\n      set: function(value) {\n        _region = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"vertical\", extend({}, baseObj, {\n      get: function() {\n        return _vertical;\n      },\n      set: function(value) {\n        var setting = findDirectionSetting(value);\n        // Have to check for false because the setting an be an empty string.\n        if (setting === false) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _vertical = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"snapToLines\", extend({}, baseObj, {\n      get: function() {\n        return _snapToLines;\n      },\n      set: function(value) {\n        _snapToLines = !!value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"line\", extend({}, baseObj, {\n      get: function() {\n        return _line;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\" && value !== autoKeyword) {\n          throw new SyntaxError(\"An invalid number or illegal string was specified.\");\n        }\n        _line = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"lineAlign\", extend({}, baseObj, {\n      get: function() {\n        return _lineAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _lineAlign = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"position\", extend({}, baseObj, {\n      get: function() {\n        return _position;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Position must be between 0 and 100.\");\n        }\n        _position = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"positionAlign\", extend({}, baseObj, {\n      get: function() {\n        return _positionAlign;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _positionAlign = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"size\", extend({}, baseObj, {\n      get: function() {\n        return _size;\n      },\n      set: function(value) {\n        if (value < 0 || value > 100) {\n          throw new Error(\"Size must be between 0 and 100.\");\n        }\n        _size = value;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  Object.defineProperty(cue,\n    \"align\", extend({}, baseObj, {\n      get: function() {\n        return _align;\n      },\n      set: function(value) {\n        var setting = findAlignSetting(value);\n        if (!setting) {\n          throw new SyntaxError(\"An invalid or illegal string was specified.\");\n        }\n        _align = setting;\n        this.hasBeenReset = true;\n      }\n    }));\n\n  /**\n   * Other <track> spec defined properties\n   */\n\n  // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state\n  cue.displayState = undefined;\n\n  if (isIE8) {\n    return cue;\n  }\n}\n\n/**\n * VTTCue methods\n */\n\nVTTCue.prototype.getCueAsHTML = function() {\n  // Assume WebVTT.convertCueToDOMTree is on the global.\n  return WebVTT.convertCueToDOMTree(window, this.text);\n};\n\nmodule.exports = VTTCue;\n","'use strict';\n\nvar BN = require('bn.js');\nvar utils = require('../utils');\nvar getNAF = utils.getNAF;\nvar getJSF = utils.getJSF;\nvar assert = utils.assert;\n\nfunction BaseCurve(type, conf) {\n  this.type = type;\n  this.p = new BN(conf.p, 16);\n\n  // Use Montgomery, when there is no fast reduction for the prime\n  this.red = conf.prime ? BN.red(conf.prime) : BN.mont(this.p);\n\n  // Useful for many curves\n  this.zero = new BN(0).toRed(this.red);\n  this.one = new BN(1).toRed(this.red);\n  this.two = new BN(2).toRed(this.red);\n\n  // Curve configuration, optional\n  this.n = conf.n && new BN(conf.n, 16);\n  this.g = conf.g && this.pointFromJSON(conf.g, conf.gRed);\n\n  // Temporary arrays\n  this._wnafT1 = new Array(4);\n  this._wnafT2 = new Array(4);\n  this._wnafT3 = new Array(4);\n  this._wnafT4 = new Array(4);\n\n  this._bitLength = this.n ? this.n.bitLength() : 0;\n\n  // Generalized Greg Maxwell's trick\n  var adjustCount = this.n && this.p.div(this.n);\n  if (!adjustCount || adjustCount.cmpn(100) > 0) {\n    this.redN = null;\n  } else {\n    this._maxwellTrick = true;\n    this.redN = this.n.toRed(this.red);\n  }\n}\nmodule.exports = BaseCurve;\n\nBaseCurve.prototype.point = function point() {\n  throw new Error('Not implemented');\n};\n\nBaseCurve.prototype.validate = function validate() {\n  throw new Error('Not implemented');\n};\n\nBaseCurve.prototype._fixedNafMul = function _fixedNafMul(p, k) {\n  assert(p.precomputed);\n  var doubles = p._getDoubles();\n\n  var naf = getNAF(k, 1, this._bitLength);\n  var I = (1 << (doubles.step + 1)) - (doubles.step % 2 === 0 ? 2 : 1);\n  I /= 3;\n\n  // Translate into more windowed form\n  var repr = [];\n  var j;\n  var nafW;\n  for (j = 0; j < naf.length; j += doubles.step) {\n    nafW = 0;\n    for (var l = j + doubles.step - 1; l >= j; l--)\n      nafW = (nafW << 1) + naf[l];\n    repr.push(nafW);\n  }\n\n  var a = this.jpoint(null, null, null);\n  var b = this.jpoint(null, null, null);\n  for (var i = I; i > 0; i--) {\n    for (j = 0; j < repr.length; j++) {\n      nafW = repr[j];\n      if (nafW === i)\n        b = b.mixedAdd(doubles.points[j]);\n      else if (nafW === -i)\n        b = b.mixedAdd(doubles.points[j].neg());\n    }\n    a = a.add(b);\n  }\n  return a.toP();\n};\n\nBaseCurve.prototype._wnafMul = function _wnafMul(p, k) {\n  var w = 4;\n\n  // Precompute window\n  var nafPoints = p._getNAFPoints(w);\n  w = nafPoints.wnd;\n  var wnd = nafPoints.points;\n\n  // Get NAF form\n  var naf = getNAF(k, w, this._bitLength);\n\n  // Add `this`*(N+1) for every w-NAF index\n  var acc = this.jpoint(null, null, null);\n  for (var i = naf.length - 1; i >= 0; i--) {\n    // Count zeroes\n    for (var l = 0; i >= 0 && naf[i] === 0; i--)\n      l++;\n    if (i >= 0)\n      l++;\n    acc = acc.dblp(l);\n\n    if (i < 0)\n      break;\n    var z = naf[i];\n    assert(z !== 0);\n    if (p.type === 'affine') {\n      // J +- P\n      if (z > 0)\n        acc = acc.mixedAdd(wnd[(z - 1) >> 1]);\n      else\n        acc = acc.mixedAdd(wnd[(-z - 1) >> 1].neg());\n    } else {\n      // J +- J\n      if (z > 0)\n        acc = acc.add(wnd[(z - 1) >> 1]);\n      else\n        acc = acc.add(wnd[(-z - 1) >> 1].neg());\n    }\n  }\n  return p.type === 'affine' ? acc.toP() : acc;\n};\n\nBaseCurve.prototype._wnafMulAdd = function _wnafMulAdd(defW,\n  points,\n  coeffs,\n  len,\n  jacobianResult) {\n  var wndWidth = this._wnafT1;\n  var wnd = this._wnafT2;\n  var naf = this._wnafT3;\n\n  // Fill all arrays\n  var max = 0;\n  var i;\n  var j;\n  var p;\n  for (i = 0; i < len; i++) {\n    p = points[i];\n    var nafPoints = p._getNAFPoints(defW);\n    wndWidth[i] = nafPoints.wnd;\n    wnd[i] = nafPoints.points;\n  }\n\n  // Comb small window NAFs\n  for (i = len - 1; i >= 1; i -= 2) {\n    var a = i - 1;\n    var b = i;\n    if (wndWidth[a] !== 1 || wndWidth[b] !== 1) {\n      naf[a] = getNAF(coeffs[a], wndWidth[a], this._bitLength);\n      naf[b] = getNAF(coeffs[b], wndWidth[b], this._bitLength);\n      max = Math.max(naf[a].length, max);\n      max = Math.max(naf[b].length, max);\n      continue;\n    }\n\n    var comb = [\n      points[a], /* 1 */\n      null, /* 3 */\n      null, /* 5 */\n      points[b], /* 7 */\n    ];\n\n    // Try to avoid Projective points, if possible\n    if (points[a].y.cmp(points[b].y) === 0) {\n      comb[1] = points[a].add(points[b]);\n      comb[2] = points[a].toJ().mixedAdd(points[b].neg());\n    } else if (points[a].y.cmp(points[b].y.redNeg()) === 0) {\n      comb[1] = points[a].toJ().mixedAdd(points[b]);\n      comb[2] = points[a].add(points[b].neg());\n    } else {\n      comb[1] = points[a].toJ().mixedAdd(points[b]);\n      comb[2] = points[a].toJ().mixedAdd(points[b].neg());\n    }\n\n    var index = [\n      -3, /* -1 -1 */\n      -1, /* -1 0 */\n      -5, /* -1 1 */\n      -7, /* 0 -1 */\n      0, /* 0 0 */\n      7, /* 0 1 */\n      5, /* 1 -1 */\n      1, /* 1 0 */\n      3,  /* 1 1 */\n    ];\n\n    var jsf = getJSF(coeffs[a], coeffs[b]);\n    max = Math.max(jsf[0].length, max);\n    naf[a] = new Array(max);\n    naf[b] = new Array(max);\n    for (j = 0; j < max; j++) {\n      var ja = jsf[0][j] | 0;\n      var jb = jsf[1][j] | 0;\n\n      naf[a][j] = index[(ja + 1) * 3 + (jb + 1)];\n      naf[b][j] = 0;\n      wnd[a] = comb;\n    }\n  }\n\n  var acc = this.jpoint(null, null, null);\n  var tmp = this._wnafT4;\n  for (i = max; i >= 0; i--) {\n    var k = 0;\n\n    while (i >= 0) {\n      var zero = true;\n      for (j = 0; j < len; j++) {\n        tmp[j] = naf[j][i] | 0;\n        if (tmp[j] !== 0)\n          zero = false;\n      }\n      if (!zero)\n        break;\n      k++;\n      i--;\n    }\n    if (i >= 0)\n      k++;\n    acc = acc.dblp(k);\n    if (i < 0)\n      break;\n\n    for (j = 0; j < len; j++) {\n      var z = tmp[j];\n      p;\n      if (z === 0)\n        continue;\n      else if (z > 0)\n        p = wnd[j][(z - 1) >> 1];\n      else if (z < 0)\n        p = wnd[j][(-z - 1) >> 1].neg();\n\n      if (p.type === 'affine')\n        acc = acc.mixedAdd(p);\n      else\n        acc = acc.add(p);\n    }\n  }\n  // Zeroify references\n  for (i = 0; i < len; i++)\n    wnd[i] = null;\n\n  if (jacobianResult)\n    return acc;\n  else\n    return acc.toP();\n};\n\nfunction BasePoint(curve, type) {\n  this.curve = curve;\n  this.type = type;\n  this.precomputed = null;\n}\nBaseCurve.BasePoint = BasePoint;\n\nBasePoint.prototype.eq = function eq(/*other*/) {\n  throw new Error('Not implemented');\n};\n\nBasePoint.prototype.validate = function validate() {\n  return this.curve.validate(this);\n};\n\nBaseCurve.prototype.decodePoint = function decodePoint(bytes, enc) {\n  bytes = utils.toArray(bytes, enc);\n\n  var len = this.p.byteLength();\n\n  // uncompressed, hybrid-odd, hybrid-even\n  if ((bytes[0] === 0x04 || bytes[0] === 0x06 || bytes[0] === 0x07) &&\n      bytes.length - 1 === 2 * len) {\n    if (bytes[0] === 0x06)\n      assert(bytes[bytes.length - 1] % 2 === 0);\n    else if (bytes[0] === 0x07)\n      assert(bytes[bytes.length - 1] % 2 === 1);\n\n    var res =  this.point(bytes.slice(1, 1 + len),\n      bytes.slice(1 + len, 1 + 2 * len));\n\n    return res;\n  } else if ((bytes[0] === 0x02 || bytes[0] === 0x03) &&\n              bytes.length - 1 === len) {\n    return this.pointFromX(bytes.slice(1, 1 + len), bytes[0] === 0x03);\n  }\n  throw new Error('Unknown point format');\n};\n\nBasePoint.prototype.encodeCompressed = function encodeCompressed(enc) {\n  return this.encode(enc, true);\n};\n\nBasePoint.prototype._encode = function _encode(compact) {\n  var len = this.curve.p.byteLength();\n  var x = this.getX().toArray('be', len);\n\n  if (compact)\n    return [ this.getY().isEven() ? 0x02 : 0x03 ].concat(x);\n\n  return [ 0x04 ].concat(x, this.getY().toArray('be', len));\n};\n\nBasePoint.prototype.encode = function encode(enc, compact) {\n  return utils.encode(this._encode(compact), enc);\n};\n\nBasePoint.prototype.precompute = function precompute(power) {\n  if (this.precomputed)\n    return this;\n\n  var precomputed = {\n    doubles: null,\n    naf: null,\n    beta: null,\n  };\n  precomputed.naf = this._getNAFPoints(8);\n  precomputed.doubles = this._getDoubles(4, power);\n  precomputed.beta = this._getBeta();\n  this.precomputed = precomputed;\n\n  return this;\n};\n\nBasePoint.prototype._hasDoubles = function _hasDoubles(k) {\n  if (!this.precomputed)\n    return false;\n\n  var doubles = this.precomputed.doubles;\n  if (!doubles)\n    return false;\n\n  return doubles.points.length >= Math.ceil((k.bitLength() + 1) / doubles.step);\n};\n\nBasePoint.prototype._getDoubles = function _getDoubles(step, power) {\n  if (this.precomputed && this.precomputed.doubles)\n    return this.precomputed.doubles;\n\n  var doubles = [ this ];\n  var acc = this;\n  for (var i = 0; i < power; i += step) {\n    for (var j = 0; j < step; j++)\n      acc = acc.dbl();\n    doubles.push(acc);\n  }\n  return {\n    step: step,\n    points: doubles,\n  };\n};\n\nBasePoint.prototype._getNAFPoints = function _getNAFPoints(wnd) {\n  if (this.precomputed && this.precomputed.naf)\n    return this.precomputed.naf;\n\n  var res = [ this ];\n  var max = (1 << wnd) - 1;\n  var dbl = max === 1 ? null : this.dbl();\n  for (var i = 1; i < max; i++)\n    res[i] = res[i - 1].add(dbl);\n  return {\n    wnd: wnd,\n    points: res,\n  };\n};\n\nBasePoint.prototype._getBeta = function _getBeta() {\n  return null;\n};\n\nBasePoint.prototype.dblp = function dblp(k) {\n  var r = this;\n  for (var i = 0; i < k; i++)\n    r = r.dbl();\n  return r;\n};\n","var win;\n\nif (typeof window !== \"undefined\") {\n    win = window;\n} else if (typeof global !== \"undefined\") {\n    win = global;\n} else if (typeof self !== \"undefined\"){\n    win = self;\n} else {\n    win = {};\n}\n\nmodule.exports = win;\n","'use strict';\n\nvar Stream = require('../utils/stream.js');\nvar ExpGolomb = require('../utils/exp-golomb.js');\n\nvar H264Stream, NalByteStream;\nvar PROFILES_WITH_OPTIONAL_SPS_DATA;\n\n/**\n * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n */\nNalByteStream = function() {\n  var\n    syncPoint = 0,\n    i,\n    buffer;\n  NalByteStream.prototype.init.call(this);\n\n  this.push = function(data) {\n    var swapBuffer;\n\n    if (!buffer) {\n      buffer = data.data;\n    } else {\n      swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n      swapBuffer.set(buffer);\n      swapBuffer.set(data.data, buffer.byteLength);\n      buffer = swapBuffer;\n    }\n\n    // Rec. ITU-T H.264, Annex B\n    // scan for NAL unit boundaries\n\n    // a match looks like this:\n    // 0 0 1 .. NAL .. 0 0 1\n    // ^ sync point        ^ i\n    // or this:\n    // 0 0 1 .. NAL .. 0 0 0\n    // ^ sync point        ^ i\n\n    // advance the sync point to a NAL start, if necessary\n    for (; syncPoint < buffer.byteLength - 3; syncPoint++) {\n      if (buffer[syncPoint + 2] === 1) {\n        // the sync point is properly aligned\n        i = syncPoint + 5;\n        break;\n      }\n    }\n\n    while (i < buffer.byteLength) {\n      // look at the current byte to determine if we've hit the end of\n      // a NAL unit boundary\n      switch (buffer[i]) {\n      case 0:\n        // skip past non-sync sequences\n        if (buffer[i - 1] !== 0) {\n          i += 2;\n          break;\n        } else if (buffer[i - 2] !== 0) {\n          i++;\n          break;\n        }\n\n        // deliver the NAL unit if it isn't empty\n        if (syncPoint + 3 !== i - 2) {\n          this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n        }\n\n        // drop trailing zeroes\n        do {\n          i++;\n        } while (buffer[i] !== 1 && i < buffer.length);\n        syncPoint = i - 2;\n        i += 3;\n        break;\n      case 1:\n        // skip past non-sync sequences\n        if (buffer[i - 1] !== 0 ||\n            buffer[i - 2] !== 0) {\n          i += 3;\n          break;\n        }\n\n        // deliver the NAL unit\n        this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n        syncPoint = i - 2;\n        i += 3;\n        break;\n      default:\n        // the current byte isn't a one or zero, so it cannot be part\n        // of a sync sequence\n        i += 3;\n        break;\n      }\n    }\n    // filter out the NAL units that were delivered\n    buffer = buffer.subarray(syncPoint);\n    i -= syncPoint;\n    syncPoint = 0;\n  };\n\n  this.flush = function() {\n    // deliver the last buffered NAL unit\n    if (buffer && buffer.byteLength > 3) {\n      this.trigger('data', buffer.subarray(syncPoint + 3));\n    }\n    // reset the stream state\n    buffer = null;\n    syncPoint = 0;\n    this.trigger('done');\n  };\n};\nNalByteStream.prototype = new Stream();\n\n// values of profile_idc that indicate additional fields are included in the SPS\n// see Recommendation ITU-T H.264 (4/2013),\n// 7.3.2.1.1 Sequence parameter set data syntax\nPROFILES_WITH_OPTIONAL_SPS_DATA = {\n  100: true,\n  110: true,\n  122: true,\n  244: true,\n  44: true,\n  83: true,\n  86: true,\n  118: true,\n  128: true,\n  138: true,\n  139: true,\n  134: true\n};\n\n/**\n * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n * events.\n */\nH264Stream = function() {\n  var\n    nalByteStream = new NalByteStream(),\n    self,\n    trackId,\n    currentPts,\n    currentDts,\n\n    discardEmulationPreventionBytes,\n    readSequenceParameterSet,\n    skipScalingList;\n\n  H264Stream.prototype.init.call(this);\n  self = this;\n\n  this.push = function(packet) {\n    if (packet.type !== 'video') {\n      return;\n    }\n    trackId = packet.trackId;\n    currentPts = packet.pts;\n    currentDts = packet.dts;\n\n    nalByteStream.push(packet);\n  };\n\n  nalByteStream.on('data', function(data) {\n    var\n      event = {\n        trackId: trackId,\n        pts: currentPts,\n        dts: currentDts,\n        data: data\n      };\n\n    switch (data[0] & 0x1f) {\n    case 0x05:\n      event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n      break;\n    case 0x06:\n      event.nalUnitType = 'sei_rbsp';\n      event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n      break;\n    case 0x07:\n      event.nalUnitType = 'seq_parameter_set_rbsp';\n      event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n      event.config = readSequenceParameterSet(event.escapedRBSP);\n      break;\n    case 0x08:\n      event.nalUnitType = 'pic_parameter_set_rbsp';\n      break;\n    case 0x09:\n      event.nalUnitType = 'access_unit_delimiter_rbsp';\n      break;\n\n    default:\n      break;\n    }\n    self.trigger('data', event);\n  });\n  nalByteStream.on('done', function() {\n    self.trigger('done');\n  });\n\n  this.flush = function() {\n    nalByteStream.flush();\n  };\n\n  /**\n   * Advance the ExpGolomb decoder past a scaling list. The scaling\n   * list is optionally transmitted as part of a sequence parameter\n   * set and is not relevant to transmuxing.\n   * @param count {number} the number of entries in this scaling list\n   * @param expGolombDecoder {object} an ExpGolomb pointed to the\n   * start of a scaling list\n   * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n   */\n  skipScalingList = function(count, expGolombDecoder) {\n    var\n      lastScale = 8,\n      nextScale = 8,\n      j,\n      deltaScale;\n\n    for (j = 0; j < count; j++) {\n      if (nextScale !== 0) {\n        deltaScale = expGolombDecoder.readExpGolomb();\n        nextScale = (lastScale + deltaScale + 256) % 256;\n      }\n\n      lastScale = (nextScale === 0) ? lastScale : nextScale;\n    }\n  };\n\n  /**\n   * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n   * Sequence Payload\"\n   * @param data {Uint8Array} the bytes of a RBSP from a NAL\n   * unit\n   * @return {Uint8Array} the RBSP without any Emulation\n   * Prevention Bytes\n   */\n  discardEmulationPreventionBytes = function(data) {\n    var\n      length = data.byteLength,\n      emulationPreventionBytesPositions = [],\n      i = 1,\n      newLength, newData;\n\n    // Find all `Emulation Prevention Bytes`\n    while (i < length - 2) {\n      if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n        emulationPreventionBytesPositions.push(i + 2);\n        i += 2;\n      } else {\n        i++;\n      }\n    }\n\n    // If no Emulation Prevention Bytes were found just return the original\n    // array\n    if (emulationPreventionBytesPositions.length === 0) {\n      return data;\n    }\n\n    // Create a new array to hold the NAL unit data\n    newLength = length - emulationPreventionBytesPositions.length;\n    newData = new Uint8Array(newLength);\n    var sourceIndex = 0;\n\n    for (i = 0; i < newLength; sourceIndex++, i++) {\n      if (sourceIndex === emulationPreventionBytesPositions[0]) {\n        // Skip this byte\n        sourceIndex++;\n        // Remove this position index\n        emulationPreventionBytesPositions.shift();\n      }\n      newData[i] = data[sourceIndex];\n    }\n\n    return newData;\n  };\n\n  /**\n   * Read a sequence parameter set and return some interesting video\n   * properties. A sequence parameter set is the H264 metadata that\n   * describes the properties of upcoming video frames.\n   * @param data {Uint8Array} the bytes of a sequence parameter set\n   * @return {object} an object with configuration parsed from the\n   * sequence parameter set, including the dimensions of the\n   * associated video frames.\n   */\n  readSequenceParameterSet = function(data) {\n    var\n      frameCropLeftOffset = 0,\n      frameCropRightOffset = 0,\n      frameCropTopOffset = 0,\n      frameCropBottomOffset = 0,\n      sarScale = 1,\n      expGolombDecoder, profileIdc, levelIdc, profileCompatibility,\n      chromaFormatIdc, picOrderCntType,\n      numRefFramesInPicOrderCntCycle, picWidthInMbsMinus1,\n      picHeightInMapUnitsMinus1,\n      frameMbsOnlyFlag,\n      scalingListCount,\n      sarRatio,\n      aspectRatioIdc,\n      i;\n\n    expGolombDecoder = new ExpGolomb(data);\n    profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n    profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n    levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n    expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n\n    // some profiles have more optional data we don't need\n    if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n      chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n      if (chromaFormatIdc === 3) {\n        expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n      }\n      expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n      expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n      expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n      if (expGolombDecoder.readBoolean()) { // seq_scaling_matrix_present_flag\n        scalingListCount = (chromaFormatIdc !== 3) ? 8 : 12;\n        for (i = 0; i < scalingListCount; i++) {\n          if (expGolombDecoder.readBoolean()) { // seq_scaling_list_present_flag[ i ]\n            if (i < 6) {\n              skipScalingList(16, expGolombDecoder);\n            } else {\n              skipScalingList(64, expGolombDecoder);\n            }\n          }\n        }\n      }\n    }\n\n    expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n    picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n\n    if (picOrderCntType === 0) {\n      expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n    } else if (picOrderCntType === 1) {\n      expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n      expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n      expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n      numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n      for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n        expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n      }\n    }\n\n    expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n    expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n    picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n    picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n\n    frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n    if (frameMbsOnlyFlag === 0) {\n      expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n    }\n\n    expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n    if (expGolombDecoder.readBoolean()) { // frame_cropping_flag\n      frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n      frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n      frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n      frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n    }\n    if (expGolombDecoder.readBoolean()) {\n      // vui_parameters_present_flag\n      if (expGolombDecoder.readBoolean()) {\n        // aspect_ratio_info_present_flag\n        aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n        switch (aspectRatioIdc) {\n          case 1: sarRatio = [1, 1]; break;\n          case 2: sarRatio = [12, 11]; break;\n          case 3: sarRatio = [10, 11]; break;\n          case 4: sarRatio = [16, 11]; break;\n          case 5: sarRatio = [40, 33]; break;\n          case 6: sarRatio = [24, 11]; break;\n          case 7: sarRatio = [20, 11]; break;\n          case 8: sarRatio = [32, 11]; break;\n          case 9: sarRatio = [80, 33]; break;\n          case 10: sarRatio = [18, 11]; break;\n          case 11: sarRatio = [15, 11]; break;\n          case 12: sarRatio = [64, 33]; break;\n          case 13: sarRatio = [160, 99]; break;\n          case 14: sarRatio = [4, 3]; break;\n          case 15: sarRatio = [3, 2]; break;\n          case 16: sarRatio = [2, 1]; break;\n          case 255: {\n            sarRatio = [expGolombDecoder.readUnsignedByte() << 8 |\n                        expGolombDecoder.readUnsignedByte(),\n                        expGolombDecoder.readUnsignedByte() << 8 |\n                        expGolombDecoder.readUnsignedByte() ];\n            break;\n          }\n        }\n        if (sarRatio) {\n          sarScale = sarRatio[0] / sarRatio[1];\n        }\n      }\n    }\n    return {\n      profileIdc: profileIdc,\n      levelIdc: levelIdc,\n      profileCompatibility: profileCompatibility,\n      width: Math.ceil((((picWidthInMbsMinus1 + 1) * 16) - frameCropLeftOffset * 2 - frameCropRightOffset * 2) * sarScale),\n      height: ((2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16) - (frameCropTopOffset * 2) - (frameCropBottomOffset * 2)\n    };\n  };\n\n};\nH264Stream.prototype = new Stream();\n\nmodule.exports = {\n  H264Stream: H264Stream,\n  NalByteStream: NalByteStream\n};\n","var hash = {\n  left: 'right',\n  right: 'left',\n  bottom: 'top',\n  top: 'bottom'\n};\nexport default function getOppositePlacement(placement) {\n  return placement.replace(/left|right|bottom|top/g, function (matched) {\n    return hash[matched];\n  });\n}","var hash = {\n  start: 'end',\n  end: 'start'\n};\nexport default function getOppositeVariationPlacement(placement) {\n  return placement.replace(/start|end/g, function (matched) {\n    return hash[matched];\n  });\n}","import getVariation from \"./getVariation.js\";\nimport { variationPlacements, basePlacements, placements as allPlacements } from \"../enums.js\";\nimport detectOverflow from \"./detectOverflow.js\";\nimport getBasePlacement from \"./getBasePlacement.js\";\nexport default function computeAutoPlacement(state, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      placement = _options.placement,\n      boundary = _options.boundary,\n      rootBoundary = _options.rootBoundary,\n      padding = _options.padding,\n      flipVariations = _options.flipVariations,\n      _options$allowedAutoP = _options.allowedAutoPlacements,\n      allowedAutoPlacements = _options$allowedAutoP === void 0 ? allPlacements : _options$allowedAutoP;\n  var variation = getVariation(placement);\n  var placements = variation ? flipVariations ? variationPlacements : variationPlacements.filter(function (placement) {\n    return getVariation(placement) === variation;\n  }) : basePlacements;\n  var allowedPlacements = placements.filter(function (placement) {\n    return allowedAutoPlacements.indexOf(placement) >= 0;\n  });\n\n  if (allowedPlacements.length === 0) {\n    allowedPlacements = placements;\n\n    if (process.env.NODE_ENV !== \"production\") {\n      console.error(['Popper: The `allowedAutoPlacements` option did not allow any', 'placements. Ensure the `placement` option matches the variation', 'of the allowed placements.', 'For example, \"auto\" cannot be used to allow \"bottom-start\".', 'Use \"auto-start\" instead.'].join(' '));\n    }\n  } // $FlowFixMe[incompatible-type]: Flow seems to have problems with two array unions...\n\n\n  var overflows = allowedPlacements.reduce(function (acc, placement) {\n    acc[placement] = detectOverflow(state, {\n      placement: placement,\n      boundary: boundary,\n      rootBoundary: rootBoundary,\n      padding: padding\n    })[getBasePlacement(placement)];\n    return acc;\n  }, {});\n  return Object.keys(overflows).sort(function (a, b) {\n    return overflows[a] - overflows[b];\n  });\n}","import getOppositePlacement from \"../utils/getOppositePlacement.js\";\nimport getBasePlacement from \"../utils/getBasePlacement.js\";\nimport getOppositeVariationPlacement from \"../utils/getOppositeVariationPlacement.js\";\nimport detectOverflow from \"../utils/detectOverflow.js\";\nimport computeAutoPlacement from \"../utils/computeAutoPlacement.js\";\nimport { bottom, top, start, right, left, auto } from \"../enums.js\";\nimport getVariation from \"../utils/getVariation.js\"; // eslint-disable-next-line import/no-unused-modules\n\nfunction getExpandedFallbackPlacements(placement) {\n  if (getBasePlacement(placement) === auto) {\n    return [];\n  }\n\n  var oppositePlacement = getOppositePlacement(placement);\n  return [getOppositeVariationPlacement(placement), oppositePlacement, getOppositeVariationPlacement(oppositePlacement)];\n}\n\nfunction flip(_ref) {\n  var state = _ref.state,\n      options = _ref.options,\n      name = _ref.name;\n\n  if (state.modifiersData[name]._skip) {\n    return;\n  }\n\n  var _options$mainAxis = options.mainAxis,\n      checkMainAxis = _options$mainAxis === void 0 ? true : _options$mainAxis,\n      _options$altAxis = options.altAxis,\n      checkAltAxis = _options$altAxis === void 0 ? true : _options$altAxis,\n      specifiedFallbackPlacements = options.fallbackPlacements,\n      padding = options.padding,\n      boundary = options.boundary,\n      rootBoundary = options.rootBoundary,\n      altBoundary = options.altBoundary,\n      _options$flipVariatio = options.flipVariations,\n      flipVariations = _options$flipVariatio === void 0 ? true : _options$flipVariatio,\n      allowedAutoPlacements = options.allowedAutoPlacements;\n  var preferredPlacement = state.options.placement;\n  var basePlacement = getBasePlacement(preferredPlacement);\n  var isBasePlacement = basePlacement === preferredPlacement;\n  var fallbackPlacements = specifiedFallbackPlacements || (isBasePlacement || !flipVariations ? [getOppositePlacement(preferredPlacement)] : getExpandedFallbackPlacements(preferredPlacement));\n  var placements = [preferredPlacement].concat(fallbackPlacements).reduce(function (acc, placement) {\n    return acc.concat(getBasePlacement(placement) === auto ? computeAutoPlacement(state, {\n      placement: placement,\n      boundary: boundary,\n      rootBoundary: rootBoundary,\n      padding: padding,\n      flipVariations: flipVariations,\n      allowedAutoPlacements: allowedAutoPlacements\n    }) : placement);\n  }, []);\n  var referenceRect = state.rects.reference;\n  var popperRect = state.rects.popper;\n  var checksMap = new Map();\n  var makeFallbackChecks = true;\n  var firstFittingPlacement = placements[0];\n\n  for (var i = 0; i < placements.length; i++) {\n    var placement = placements[i];\n\n    var _basePlacement = getBasePlacement(placement);\n\n    var isStartVariation = getVariation(placement) === start;\n    var isVertical = [top, bottom].indexOf(_basePlacement) >= 0;\n    var len = isVertical ? 'width' : 'height';\n    var overflow = detectOverflow(state, {\n      placement: placement,\n      boundary: boundary,\n      rootBoundary: rootBoundary,\n      altBoundary: altBoundary,\n      padding: padding\n    });\n    var mainVariationSide = isVertical ? isStartVariation ? right : left : isStartVariation ? bottom : top;\n\n    if (referenceRect[len] > popperRect[len]) {\n      mainVariationSide = getOppositePlacement(mainVariationSide);\n    }\n\n    var altVariationSide = getOppositePlacement(mainVariationSide);\n    var checks = [];\n\n    if (checkMainAxis) {\n      checks.push(overflow[_basePlacement] <= 0);\n    }\n\n    if (checkAltAxis) {\n      checks.push(overflow[mainVariationSide] <= 0, overflow[altVariationSide] <= 0);\n    }\n\n    if (checks.every(function (check) {\n      return check;\n    })) {\n      firstFittingPlacement = placement;\n      makeFallbackChecks = false;\n      break;\n    }\n\n    checksMap.set(placement, checks);\n  }\n\n  if (makeFallbackChecks) {\n    // `2` may be desired in some cases – research later\n    var numberOfChecks = flipVariations ? 3 : 1;\n\n    var _loop = function _loop(_i) {\n      var fittingPlacement = placements.find(function (placement) {\n        var checks = checksMap.get(placement);\n\n        if (checks) {\n          return checks.slice(0, _i).every(function (check) {\n            return check;\n          });\n        }\n      });\n\n      if (fittingPlacement) {\n        firstFittingPlacement = fittingPlacement;\n        return \"break\";\n      }\n    };\n\n    for (var _i = numberOfChecks; _i > 0; _i--) {\n      var _ret = _loop(_i);\n\n      if (_ret === \"break\") break;\n    }\n  }\n\n  if (state.placement !== firstFittingPlacement) {\n    state.modifiersData[name]._skip = true;\n    state.placement = firstFittingPlacement;\n    state.reset = true;\n  }\n} // eslint-disable-next-line import/no-unused-modules\n\n\nexport default {\n  name: 'flip',\n  enabled: true,\n  phase: 'main',\n  fn: flip,\n  requiresIfExists: ['offset'],\n  data: {\n    _skip: false\n  }\n};","/**\n * @file ad-cue-tags.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _slicedToArray = (function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i['return']) _i['return'](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError('Invalid attempt to destructure non-iterable instance'); } }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\n/**\n * Searches for an ad cue that overlaps with the given mediaTime\n */\nvar findAdCue = function findAdCue(track, mediaTime) {\n  var cues = track.cues;\n\n  for (var i = 0; i < cues.length; i++) {\n    var cue = cues[i];\n\n    if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n      return cue;\n    }\n  }\n  return null;\n};\n\nvar updateAdCues = function updateAdCues(media, track) {\n  var offset = arguments.length <= 2 || arguments[2] === undefined ? 0 : arguments[2];\n\n  if (!media.segments) {\n    return;\n  }\n\n  var mediaTime = offset;\n  var cue = undefined;\n\n  for (var i = 0; i < media.segments.length; i++) {\n    var segment = media.segments[i];\n\n    if (!cue) {\n      // Since the cues will span for at least the segment duration, adding a fudge\n      // factor of half segment duration will prevent duplicate cues from being\n      // created when timing info is not exact (e.g. cue start time initialized\n      // at 10.006677, but next call mediaTime is 10.003332 )\n      cue = findAdCue(track, mediaTime + segment.duration / 2);\n    }\n\n    if (cue) {\n      if ('cueIn' in segment) {\n        // Found a CUE-IN so end the cue\n        cue.endTime = mediaTime;\n        cue.adEndTime = mediaTime;\n        mediaTime += segment.duration;\n        cue = null;\n        continue;\n      }\n\n      if (mediaTime < cue.endTime) {\n        // Already processed this mediaTime for this cue\n        mediaTime += segment.duration;\n        continue;\n      }\n\n      // otherwise extend cue until a CUE-IN is found\n      cue.endTime += segment.duration;\n    } else {\n      if ('cueOut' in segment) {\n        cue = new _globalWindow2['default'].VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n        cue.adStartTime = mediaTime;\n        // Assumes tag format to be\n        // #EXT-X-CUE-OUT:30\n        cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n        track.addCue(cue);\n      }\n\n      if ('cueOutCont' in segment) {\n        // Entered into the middle of an ad cue\n        var adOffset = undefined;\n        var adTotal = undefined;\n\n        // Assumes tag formate to be\n        // #EXT-X-CUE-OUT-CONT:10/30\n\n        var _segment$cueOutCont$split$map = segment.cueOutCont.split('/').map(parseFloat);\n\n        var _segment$cueOutCont$split$map2 = _slicedToArray(_segment$cueOutCont$split$map, 2);\n\n        adOffset = _segment$cueOutCont$split$map2[0];\n        adTotal = _segment$cueOutCont$split$map2[1];\n\n        cue = new _globalWindow2['default'].VTTCue(mediaTime, mediaTime + segment.duration, '');\n        cue.adStartTime = mediaTime - adOffset;\n        cue.adEndTime = cue.adStartTime + adTotal;\n        track.addCue(cue);\n      }\n    }\n    mediaTime += segment.duration;\n  }\n};\n\nexports['default'] = {\n  updateAdCues: updateAdCues,\n  findAdCue: findAdCue\n};\nmodule.exports = exports['default'];","var setPrototypeOf = require(\"./setPrototypeOf.js\");\n\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) setPrototypeOf(subClass, superClass);\n}\n\nmodule.exports = _inherits;\nmodule.exports[\"default\"] = module.exports, module.exports.__esModule = true;","/**\n * @file aes.js\n *\n * This file contains an adaptation of the AES decryption algorithm\n * from the Standford Javascript Cryptography Library. That work is\n * covered by the following copyright and permissions notice:\n *\n * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n * All rights reserved.\n *\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n * 1. Redistributions of source code must retain the above copyright\n *    notice, this list of conditions and the following disclaimer.\n *\n * 2. Redistributions in binary form must reproduce the above\n *    copyright notice, this list of conditions and the following\n *    disclaimer in the documentation and/or other materials provided\n *    with the distribution.\n *\n * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *\n * The views and conclusions contained in the software and documentation\n * are those of the authors and should not be interpreted as representing\n * official policies, either expressed or implied, of the authors.\n */\n\n/**\n * Expand the S-box tables.\n *\n * @private\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar precompute = function precompute() {\n  var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n  var encTable = tables[0];\n  var decTable = tables[1];\n  var sbox = encTable[4];\n  var sboxInv = decTable[4];\n  var i = undefined;\n  var x = undefined;\n  var xInv = undefined;\n  var d = [];\n  var th = [];\n  var x2 = undefined;\n  var x4 = undefined;\n  var x8 = undefined;\n  var s = undefined;\n  var tEnc = undefined;\n  var tDec = undefined;\n\n  // Compute double and third tables\n  for (i = 0; i < 256; i++) {\n    th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n  }\n\n  for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n    // Compute sbox\n    s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n    s = s >> 8 ^ s & 255 ^ 99;\n    sbox[x] = s;\n    sboxInv[s] = x;\n\n    // Compute MixColumns\n    x8 = d[x4 = d[x2 = d[x]]];\n    tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n    tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n    for (i = 0; i < 4; i++) {\n      encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n      decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n    }\n  }\n\n  // Compactify. Considerable speedup on Firefox.\n  for (i = 0; i < 5; i++) {\n    encTable[i] = encTable[i].slice(0);\n    decTable[i] = decTable[i].slice(0);\n  }\n  return tables;\n};\nvar aesTables = null;\n\n/**\n * Schedule out an AES key for both encryption and decryption. This\n * is a low-level class. Use a cipher mode to do bulk encryption.\n *\n * @class AES\n * @param key {Array} The key as an array of 4, 6 or 8 words.\n */\n\nvar AES = (function () {\n  function AES(key) {\n    _classCallCheck(this, AES);\n\n    /**\n     * The expanded S-box and inverse S-box tables. These will be computed\n     * on the client so that we don't have to send them down the wire.\n     *\n     * There are two tables, _tables[0] is for encryption and\n     * _tables[1] is for decryption.\n     *\n     * The first 4 sub-tables are the expanded S-box with MixColumns. The\n     * last (_tables[01][4]) is the S-box itself.\n     *\n     * @private\n     */\n    // if we have yet to precompute the S-box tables\n    // do so now\n    if (!aesTables) {\n      aesTables = precompute();\n    }\n    // then make a copy of that object for use\n    this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n    var i = undefined;\n    var j = undefined;\n    var tmp = undefined;\n    var encKey = undefined;\n    var decKey = undefined;\n    var sbox = this._tables[0][4];\n    var decTable = this._tables[1];\n    var keyLen = key.length;\n    var rcon = 1;\n\n    if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n      throw new Error('Invalid aes key size');\n    }\n\n    encKey = key.slice(0);\n    decKey = [];\n    this._key = [encKey, decKey];\n\n    // schedule encryption keys\n    for (i = keyLen; i < 4 * keyLen + 28; i++) {\n      tmp = encKey[i - 1];\n\n      // apply sbox\n      if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n        tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255];\n\n        // shift rows and add rcon\n        if (i % keyLen === 0) {\n          tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n          rcon = rcon << 1 ^ (rcon >> 7) * 283;\n        }\n      }\n\n      encKey[i] = encKey[i - keyLen] ^ tmp;\n    }\n\n    // schedule decryption keys\n    for (j = 0; i; j++, i--) {\n      tmp = encKey[j & 3 ? i : i - 4];\n      if (i <= 4 || j < 4) {\n        decKey[j] = tmp;\n      } else {\n        decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n      }\n    }\n  }\n\n  /**\n   * Decrypt 16 bytes, specified as four 32-bit words.\n   *\n   * @param {Number} encrypted0 the first word to decrypt\n   * @param {Number} encrypted1 the second word to decrypt\n   * @param {Number} encrypted2 the third word to decrypt\n   * @param {Number} encrypted3 the fourth word to decrypt\n   * @param {Int32Array} out the array to write the decrypted words\n   * into\n   * @param {Number} offset the offset into the output array to start\n   * writing results\n   * @return {Array} The plaintext.\n   */\n\n  _createClass(AES, [{\n    key: 'decrypt',\n    value: function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n      var key = this._key[1];\n      // state variables a,b,c,d are loaded with pre-whitened data\n      var a = encrypted0 ^ key[0];\n      var b = encrypted3 ^ key[1];\n      var c = encrypted2 ^ key[2];\n      var d = encrypted1 ^ key[3];\n      var a2 = undefined;\n      var b2 = undefined;\n      var c2 = undefined;\n\n      // key.length === 2 ?\n      var nInnerRounds = key.length / 4 - 2;\n      var i = undefined;\n      var kIndex = 4;\n      var table = this._tables[1];\n\n      // load up the tables\n      var table0 = table[0];\n      var table1 = table[1];\n      var table2 = table[2];\n      var table3 = table[3];\n      var sbox = table[4];\n\n      // Inner rounds. Cribbed from OpenSSL.\n      for (i = 0; i < nInnerRounds; i++) {\n        a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n        b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n        c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n        d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n        kIndex += 4;\n        a = a2;b = b2;c = c2;\n      }\n\n      // Last round.\n      for (i = 0; i < 4; i++) {\n        out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n        a2 = a;a = b;b = c;c = d;d = a2;\n      }\n    }\n  }]);\n\n  return AES;\n})();\n\nexports['default'] = AES;\nmodule.exports = exports['default'];","'use strict';\n\nvar utils = require('./utils');\nvar assert = require('minimalistic-assert');\n\nfunction BlockHash() {\n  this.pending = null;\n  this.pendingTotal = 0;\n  this.blockSize = this.constructor.blockSize;\n  this.outSize = this.constructor.outSize;\n  this.hmacStrength = this.constructor.hmacStrength;\n  this.padLength = this.constructor.padLength / 8;\n  this.endian = 'big';\n\n  this._delta8 = this.blockSize / 8;\n  this._delta32 = this.blockSize / 32;\n}\nexports.BlockHash = BlockHash;\n\nBlockHash.prototype.update = function update(msg, enc) {\n  // Convert message to array, pad it, and join into 32bit blocks\n  msg = utils.toArray(msg, enc);\n  if (!this.pending)\n    this.pending = msg;\n  else\n    this.pending = this.pending.concat(msg);\n  this.pendingTotal += msg.length;\n\n  // Enough data, try updating\n  if (this.pending.length >= this._delta8) {\n    msg = this.pending;\n\n    // Process pending data in blocks\n    var r = msg.length % this._delta8;\n    this.pending = msg.slice(msg.length - r, msg.length);\n    if (this.pending.length === 0)\n      this.pending = null;\n\n    msg = utils.join32(msg, 0, msg.length - r, this.endian);\n    for (var i = 0; i < msg.length; i += this._delta32)\n      this._update(msg, i, i + this._delta32);\n  }\n\n  return this;\n};\n\nBlockHash.prototype.digest = function digest(enc) {\n  this.update(this._pad());\n  assert(this.pending === null);\n\n  return this._digest(enc);\n};\n\nBlockHash.prototype._pad = function pad() {\n  var len = this.pendingTotal;\n  var bytes = this._delta8;\n  var k = bytes - ((len + this.padLength) % bytes);\n  var res = new Array(k + this.padLength);\n  res[0] = 0x80;\n  for (var i = 1; i < k; i++)\n    res[i] = 0;\n\n  // Append length\n  len <<= 3;\n  if (this.endian === 'big') {\n    for (var t = 8; t < this.padLength; t++)\n      res[i++] = 0;\n\n    res[i++] = 0;\n    res[i++] = 0;\n    res[i++] = 0;\n    res[i++] = 0;\n    res[i++] = (len >>> 24) & 0xff;\n    res[i++] = (len >>> 16) & 0xff;\n    res[i++] = (len >>> 8) & 0xff;\n    res[i++] = len & 0xff;\n  } else {\n    res[i++] = len & 0xff;\n    res[i++] = (len >>> 8) & 0xff;\n    res[i++] = (len >>> 16) & 0xff;\n    res[i++] = (len >>> 24) & 0xff;\n    res[i++] = 0;\n    res[i++] = 0;\n    res[i++] = 0;\n    res[i++] = 0;\n\n    for (t = 8; t < this.padLength; t++)\n      res[i++] = 0;\n  }\n\n  return res;\n};\n","// Ported from https://github.com/mafintosh/end-of-stream with\n// permission from the author, Mathias Buus (@mafintosh).\n'use strict';\n\nvar ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;\n\nfunction once(callback) {\n  var called = false;\n  return function () {\n    if (called) return;\n    called = true;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    callback.apply(this, args);\n  };\n}\n\nfunction noop() {}\n\nfunction isRequest(stream) {\n  return stream.setHeader && typeof stream.abort === 'function';\n}\n\nfunction eos(stream, opts, callback) {\n  if (typeof opts === 'function') return eos(stream, null, opts);\n  if (!opts) opts = {};\n  callback = once(callback || noop);\n  var readable = opts.readable || opts.readable !== false && stream.readable;\n  var writable = opts.writable || opts.writable !== false && stream.writable;\n\n  var onlegacyfinish = function onlegacyfinish() {\n    if (!stream.writable) onfinish();\n  };\n\n  var writableEnded = stream._writableState && stream._writableState.finished;\n\n  var onfinish = function onfinish() {\n    writable = false;\n    writableEnded = true;\n    if (!readable) callback.call(stream);\n  };\n\n  var readableEnded = stream._readableState && stream._readableState.endEmitted;\n\n  var onend = function onend() {\n    readable = false;\n    readableEnded = true;\n    if (!writable) callback.call(stream);\n  };\n\n  var onerror = function onerror(err) {\n    callback.call(stream, err);\n  };\n\n  var onclose = function onclose() {\n    var err;\n\n    if (readable && !readableEnded) {\n      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();\n      return callback.call(stream, err);\n    }\n\n    if (writable && !writableEnded) {\n      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();\n      return callback.call(stream, err);\n    }\n  };\n\n  var onrequest = function onrequest() {\n    stream.req.on('finish', onfinish);\n  };\n\n  if (isRequest(stream)) {\n    stream.on('complete', onfinish);\n    stream.on('abort', onclose);\n    if (stream.req) onrequest();else stream.on('request', onrequest);\n  } else if (writable && !stream._writableState) {\n    // legacy streams\n    stream.on('end', onlegacyfinish);\n    stream.on('close', onlegacyfinish);\n  }\n\n  stream.on('end', onend);\n  stream.on('finish', onfinish);\n  if (opts.error !== false) stream.on('error', onerror);\n  stream.on('close', onclose);\n  return function () {\n    stream.removeListener('complete', onfinish);\n    stream.removeListener('abort', onclose);\n    stream.removeListener('request', onrequest);\n    if (stream.req) stream.req.removeListener('finish', onfinish);\n    stream.removeListener('end', onlegacyfinish);\n    stream.removeListener('close', onlegacyfinish);\n    stream.removeListener('finish', onfinish);\n    stream.removeListener('end', onend);\n    stream.removeListener('error', onerror);\n    stream.removeListener('close', onclose);\n  };\n}\n\nmodule.exports = eos;","\"use strict\";\nvar window = require(\"global/window\")\nvar isFunction = require(\"is-function\")\nvar parseHeaders = require(\"parse-headers\")\nvar xtend = require(\"xtend\")\n\nmodule.exports = createXHR\ncreateXHR.XMLHttpRequest = window.XMLHttpRequest || noop\ncreateXHR.XDomainRequest = \"withCredentials\" in (new createXHR.XMLHttpRequest()) ? createXHR.XMLHttpRequest : window.XDomainRequest\n\nforEachArray([\"get\", \"put\", \"post\", \"patch\", \"head\", \"delete\"], function(method) {\n    createXHR[method === \"delete\" ? \"del\" : method] = function(uri, options, callback) {\n        options = initParams(uri, options, callback)\n        options.method = method.toUpperCase()\n        return _createXHR(options)\n    }\n})\n\nfunction forEachArray(array, iterator) {\n    for (var i = 0; i < array.length; i++) {\n        iterator(array[i])\n    }\n}\n\nfunction isEmpty(obj){\n    for(var i in obj){\n        if(obj.hasOwnProperty(i)) return false\n    }\n    return true\n}\n\nfunction initParams(uri, options, callback) {\n    var params = uri\n\n    if (isFunction(options)) {\n        callback = options\n        if (typeof uri === \"string\") {\n            params = {uri:uri}\n        }\n    } else {\n        params = xtend(options, {uri: uri})\n    }\n\n    params.callback = callback\n    return params\n}\n\nfunction createXHR(uri, options, callback) {\n    options = initParams(uri, options, callback)\n    return _createXHR(options)\n}\n\nfunction _createXHR(options) {\n    if(typeof options.callback === \"undefined\"){\n        throw new Error(\"callback argument missing\")\n    }\n\n    var called = false\n    var callback = function cbOnce(err, response, body){\n        if(!called){\n            called = true\n            options.callback(err, response, body)\n        }\n    }\n\n    function readystatechange() {\n        if (xhr.readyState === 4) {\n            setTimeout(loadFunc, 0)\n        }\n    }\n\n    function getBody() {\n        // Chrome with requestType=blob throws errors arround when even testing access to responseText\n        var body = undefined\n\n        if (xhr.response) {\n            body = xhr.response\n        } else {\n            body = xhr.responseText || getXml(xhr)\n        }\n\n        if (isJson) {\n            try {\n                body = JSON.parse(body)\n            } catch (e) {}\n        }\n\n        return body\n    }\n\n    function errorFunc(evt) {\n        clearTimeout(timeoutTimer)\n        if(!(evt instanceof Error)){\n            evt = new Error(\"\" + (evt || \"Unknown XMLHttpRequest Error\") )\n        }\n        evt.statusCode = 0\n        return callback(evt, failureResponse)\n    }\n\n    // will load the data & process the response in a special response object\n    function loadFunc() {\n        if (aborted) return\n        var status\n        clearTimeout(timeoutTimer)\n        if(options.useXDR && xhr.status===undefined) {\n            //IE8 CORS GET successful response doesn't have a status field, but body is fine\n            status = 200\n        } else {\n            status = (xhr.status === 1223 ? 204 : xhr.status)\n        }\n        var response = failureResponse\n        var err = null\n\n        if (status !== 0){\n            response = {\n                body: getBody(),\n                statusCode: status,\n                method: method,\n                headers: {},\n                url: uri,\n                rawRequest: xhr\n            }\n            if(xhr.getAllResponseHeaders){ //remember xhr can in fact be XDR for CORS in IE\n                response.headers = parseHeaders(xhr.getAllResponseHeaders())\n            }\n        } else {\n            err = new Error(\"Internal XMLHttpRequest Error\")\n        }\n        return callback(err, response, response.body)\n    }\n\n    var xhr = options.xhr || null\n\n    if (!xhr) {\n        if (options.cors || options.useXDR) {\n            xhr = new createXHR.XDomainRequest()\n        }else{\n            xhr = new createXHR.XMLHttpRequest()\n        }\n    }\n\n    var key\n    var aborted\n    var uri = xhr.url = options.uri || options.url\n    var method = xhr.method = options.method || \"GET\"\n    var body = options.body || options.data\n    var headers = xhr.headers = options.headers || {}\n    var sync = !!options.sync\n    var isJson = false\n    var timeoutTimer\n    var failureResponse = {\n        body: undefined,\n        headers: {},\n        statusCode: 0,\n        method: method,\n        url: uri,\n        rawRequest: xhr\n    }\n\n    if (\"json\" in options && options.json !== false) {\n        isJson = true\n        headers[\"accept\"] || headers[\"Accept\"] || (headers[\"Accept\"] = \"application/json\") //Don't override existing accept header declared by user\n        if (method !== \"GET\" && method !== \"HEAD\") {\n            headers[\"content-type\"] || headers[\"Content-Type\"] || (headers[\"Content-Type\"] = \"application/json\") //Don't override existing accept header declared by user\n            body = JSON.stringify(options.json === true ? body : options.json)\n        }\n    }\n\n    xhr.onreadystatechange = readystatechange\n    xhr.onload = loadFunc\n    xhr.onerror = errorFunc\n    // IE9 must have onprogress be set to a unique function.\n    xhr.onprogress = function () {\n        // IE must die\n    }\n    xhr.onabort = function(){\n        aborted = true;\n    }\n    xhr.ontimeout = errorFunc\n    xhr.open(method, uri, !sync, options.username, options.password)\n    //has to be after open\n    if(!sync) {\n        xhr.withCredentials = !!options.withCredentials\n    }\n    // Cannot set timeout with sync request\n    // not setting timeout on the xhr object, because of old webkits etc. not handling that correctly\n    // both npm's request and jquery 1.x use this kind of timeout, so this is being consistent\n    if (!sync && options.timeout > 0 ) {\n        timeoutTimer = setTimeout(function(){\n            if (aborted) return\n            aborted = true//IE9 may still call readystatechange\n            xhr.abort(\"timeout\")\n            var e = new Error(\"XMLHttpRequest timeout\")\n            e.code = \"ETIMEDOUT\"\n            errorFunc(e)\n        }, options.timeout )\n    }\n\n    if (xhr.setRequestHeader) {\n        for(key in headers){\n            if(headers.hasOwnProperty(key)){\n                xhr.setRequestHeader(key, headers[key])\n            }\n        }\n    } else if (options.headers && !isEmpty(options.headers)) {\n        throw new Error(\"Headers cannot be set on an XDomainRequest object\")\n    }\n\n    if (\"responseType\" in options) {\n        xhr.responseType = options.responseType\n    }\n\n    if (\"beforeSend\" in options &&\n        typeof options.beforeSend === \"function\"\n    ) {\n        options.beforeSend(xhr)\n    }\n\n    // Microsoft Edge browser sends \"undefined\" when send is called with undefined value.\n    // XMLHttpRequest spec says to pass null as body to indicate no body\n    // See https://github.com/naugtur/xhr/issues/100.\n    xhr.send(body || null)\n\n    return xhr\n\n\n}\n\nfunction getXml(xhr) {\n    if (xhr.responseType === \"document\") {\n        return xhr.responseXML\n    }\n    var firefoxBugTakenEffect = xhr.responseXML && xhr.responseXML.documentElement.nodeName === \"parsererror\"\n    if (xhr.responseType === \"\" && !firefoxBugTakenEffect) {\n        return xhr.responseXML\n    }\n\n    return null\n}\n\nfunction noop() {}\n","var topLevel = typeof global !== 'undefined' ? global :\n    typeof window !== 'undefined' ? window : {}\nvar minDoc = require('min-document');\n\nvar doccy;\n\nif (typeof document !== 'undefined') {\n    doccy = document;\n} else {\n    doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];\n\n    if (!doccy) {\n        doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;\n    }\n}\n\nmodule.exports = doccy;\n","'use strict';\n\nconst encoders = require('./encoders');\nconst decoders = require('./decoders');\nconst inherits = require('inherits');\n\nconst api = exports;\n\napi.define = function define(name, body) {\n  return new Entity(name, body);\n};\n\nfunction Entity(name, body) {\n  this.name = name;\n  this.body = body;\n\n  this.decoders = {};\n  this.encoders = {};\n}\n\nEntity.prototype._createNamed = function createNamed(Base) {\n  const name = this.name;\n\n  function Generated(entity) {\n    this._initNamed(entity, name);\n  }\n  inherits(Generated, Base);\n  Generated.prototype._initNamed = function _initNamed(entity, name) {\n    Base.call(this, entity, name);\n  };\n\n  return new Generated(this);\n};\n\nEntity.prototype._getDecoder = function _getDecoder(enc) {\n  enc = enc || 'der';\n  // Lazily create decoder\n  if (!this.decoders.hasOwnProperty(enc))\n    this.decoders[enc] = this._createNamed(decoders[enc]);\n  return this.decoders[enc];\n};\n\nEntity.prototype.decode = function decode(data, enc, options) {\n  return this._getDecoder(enc).decode(data, options);\n};\n\nEntity.prototype._getEncoder = function _getEncoder(enc) {\n  enc = enc || 'der';\n  // Lazily create encoder\n  if (!this.encoders.hasOwnProperty(enc))\n    this.encoders[enc] = this._createNamed(encoders[enc]);\n  return this.encoders[enc];\n};\n\nEntity.prototype.encode = function encode(data, enc, /* internal */ reporter) {\n  return this._getEncoder(enc).encode(data, reporter);\n};\n","import { isElement } from \"./instanceOf.js\";\nexport default function getDocumentElement(element) {\n  // $FlowFixMe[incompatible-return]: assume body is always available\n  return ((isElement(element) ? element.ownerDocument : // $FlowFixMe[prop-missing]\n  element.document) || window.document).documentElement;\n}","'use strict';\nvar aFunction = require('../internals/a-function');\n\nvar PromiseCapability = function (C) {\n  var resolve, reject;\n  this.promise = new C(function ($$resolve, $$reject) {\n    if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');\n    resolve = $$resolve;\n    reject = $$reject;\n  });\n  this.resolve = aFunction(resolve);\n  this.reject = aFunction(reject);\n};\n\n// 25.4.1.5 NewPromiseCapability(C)\nmodule.exports.f = function (C) {\n  return new PromiseCapability(C);\n};\n","/**\n * @license\n * Video.js 7.21.5 <http://videojs.com/>\n * Copyright Brightcove, Inc. <https://www.brightcove.com/>\n * Available under Apache License Version 2.0\n * <https://github.com/videojs/video.js/blob/main/LICENSE>\n *\n * Includes vtt.js <https://github.com/mozilla/vtt.js>\n * Available under Apache License Version 2.0\n * <https://github.com/mozilla/vtt.js/blob/main/LICENSE>\n */\n\nimport window$1 from 'global/window';\nimport document from 'global/document';\nimport _extends from '@babel/runtime/helpers/extends';\nimport keycode from 'keycode';\nimport _assertThisInitialized from '@babel/runtime/helpers/assertThisInitialized';\nimport _inheritsLoose from '@babel/runtime/helpers/inheritsLoose';\nimport safeParseTuple from 'safe-json-parse/tuple';\nimport XHR from '@videojs/xhr';\nimport vtt from 'videojs-vtt.js';\nimport _construct from '@babel/runtime/helpers/construct';\nimport _inherits from '@babel/runtime/helpers/inherits';\nimport _resolveUrl from '@videojs/vhs-utils/es/resolve-url.js';\nimport { Parser } from 'm3u8-parser';\nimport { browserSupportsCodec, DEFAULT_VIDEO_CODEC, DEFAULT_AUDIO_CODEC, muxerSupportsCodec, parseCodecs, translateLegacyCodec, codecsFromDefault, getMimeForCodec, isAudioCodec } from '@videojs/vhs-utils/es/codecs.js';\nimport { simpleTypeFromSourceType } from '@videojs/vhs-utils/es/media-types.js';\nimport { isArrayBufferView, concatTypedArrays, stringToBytes, toUint8 } from '@videojs/vhs-utils/es/byte-helpers';\nimport { generateSidxKey, parseUTCTiming, parse, addSidxSegmentsToPlaylist } from 'mpd-parser';\nimport parseSidx from 'mux.js/lib/tools/parse-sidx';\nimport { getId3Offset } from '@videojs/vhs-utils/es/id3-helpers';\nimport { detectContainerForBytes, isLikelyFmp4MediaSegment } from '@videojs/vhs-utils/es/containers';\nimport { ONE_SECOND_IN_TS } from 'mux.js/lib/utils/clock';\nimport _wrapNativeSuper from '@babel/runtime/helpers/wrapNativeSuper';\n\nvar version$5 = \"7.21.5\";\n\n/**\n * An Object that contains lifecycle hooks as keys which point to an array\n * of functions that are run when a lifecycle is triggered\n *\n * @private\n */\nvar hooks_ = {};\n/**\n * Get a list of hooks for a specific lifecycle\n *\n * @param  {string} type\n *         the lifecyle to get hooks from\n *\n * @param  {Function|Function[]} [fn]\n *         Optionally add a hook (or hooks) to the lifecycle that your are getting.\n *\n * @return {Array}\n *         an array of hooks, or an empty array if there are none.\n */\n\nvar hooks = function hooks(type, fn) {\n  hooks_[type] = hooks_[type] || [];\n\n  if (fn) {\n    hooks_[type] = hooks_[type].concat(fn);\n  }\n\n  return hooks_[type];\n};\n/**\n * Add a function hook to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvar hook = function hook(type, fn) {\n  hooks(type, fn);\n};\n/**\n * Remove a hook from a specific videojs lifecycle.\n *\n * @param  {string} type\n *         the lifecycle that the function hooked to\n *\n * @param  {Function} fn\n *         The hooked function to remove\n *\n * @return {boolean}\n *         The function that was removed or undef\n */\n\n\nvar removeHook = function removeHook(type, fn) {\n  var index = hooks(type).indexOf(fn);\n\n  if (index <= -1) {\n    return false;\n  }\n\n  hooks_[type] = hooks_[type].slice();\n  hooks_[type].splice(index, 1);\n  return true;\n};\n/**\n * Add a function hook that will only run once to a specific videojs lifecycle.\n *\n * @param {string} type\n *        the lifecycle to hook the function to.\n *\n * @param {Function|Function[]}\n *        The function or array of functions to attach.\n */\n\n\nvar hookOnce = function hookOnce(type, fn) {\n  hooks(type, [].concat(fn).map(function (original) {\n    var wrapper = function wrapper() {\n      removeHook(type, wrapper);\n      return original.apply(void 0, arguments);\n    };\n\n    return wrapper;\n  }));\n};\n\n/**\n * @file fullscreen-api.js\n * @module fullscreen-api\n * @private\n */\n/**\n * Store the browser-specific methods for the fullscreen API.\n *\n * @type {Object}\n * @see [Specification]{@link https://fullscreen.spec.whatwg.org}\n * @see [Map Approach From Screenfull.js]{@link https://github.com/sindresorhus/screenfull.js}\n */\n\nvar FullscreenApi = {\n  prefixed: true\n}; // browser API methods\n\nvar apiMap = [['requestFullscreen', 'exitFullscreen', 'fullscreenElement', 'fullscreenEnabled', 'fullscreenchange', 'fullscreenerror', 'fullscreen'], // WebKit\n['webkitRequestFullscreen', 'webkitExitFullscreen', 'webkitFullscreenElement', 'webkitFullscreenEnabled', 'webkitfullscreenchange', 'webkitfullscreenerror', '-webkit-full-screen'], // Mozilla\n['mozRequestFullScreen', 'mozCancelFullScreen', 'mozFullScreenElement', 'mozFullScreenEnabled', 'mozfullscreenchange', 'mozfullscreenerror', '-moz-full-screen'], // Microsoft\n['msRequestFullscreen', 'msExitFullscreen', 'msFullscreenElement', 'msFullscreenEnabled', 'MSFullscreenChange', 'MSFullscreenError', '-ms-fullscreen']];\nvar specApi = apiMap[0];\nvar browserApi; // determine the supported set of functions\n\nfor (var i = 0; i < apiMap.length; i++) {\n  // check for exitFullscreen function\n  if (apiMap[i][1] in document) {\n    browserApi = apiMap[i];\n    break;\n  }\n} // map the browser API names to the spec API names\n\n\nif (browserApi) {\n  for (var _i = 0; _i < browserApi.length; _i++) {\n    FullscreenApi[specApi[_i]] = browserApi[_i];\n  }\n\n  FullscreenApi.prefixed = browserApi[0] !== specApi[0];\n}\n\n/**\n * @file create-logger.js\n * @module create-logger\n */\n\nvar history = [];\n/**\n * Log messages to the console and history based on the type of message\n *\n * @private\n * @param  {string} type\n *         The name of the console method to use.\n *\n * @param  {Array} args\n *         The arguments to be passed to the matching console method.\n */\n\nvar LogByTypeFactory = function LogByTypeFactory(name, log) {\n  return function (type, level, args) {\n    var lvl = log.levels[level];\n    var lvlRegExp = new RegExp(\"^(\" + lvl + \")$\");\n\n    if (type !== 'log') {\n      // Add the type to the front of the message when it's not \"log\".\n      args.unshift(type.toUpperCase() + ':');\n    } // Add console prefix after adding to history.\n\n\n    args.unshift(name + ':'); // Add a clone of the args at this point to history.\n\n    if (history) {\n      history.push([].concat(args)); // only store 1000 history entries\n\n      var splice = history.length - 1000;\n      history.splice(0, splice > 0 ? splice : 0);\n    } // If there's no console then don't try to output messages, but they will\n    // still be stored in history.\n\n\n    if (!window$1.console) {\n      return;\n    } // Was setting these once outside of this function, but containing them\n    // in the function makes it easier to test cases where console doesn't exist\n    // when the module is executed.\n\n\n    var fn = window$1.console[type];\n\n    if (!fn && type === 'debug') {\n      // Certain browsers don't have support for console.debug. For those, we\n      // should default to the closest comparable log.\n      fn = window$1.console.info || window$1.console.log;\n    } // Bail out if there's no console or if this type is not allowed by the\n    // current logging level.\n\n\n    if (!fn || !lvl || !lvlRegExp.test(type)) {\n      return;\n    }\n\n    fn[Array.isArray(args) ? 'apply' : 'call'](window$1.console, args);\n  };\n};\n\nfunction createLogger$1(name) {\n  // This is the private tracking variable for logging level.\n  var level = 'info'; // the curried logByType bound to the specific log and history\n\n  var logByType;\n  /**\n   * Logs plain debug messages. Similar to `console.log`.\n   *\n   * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n   * of our JSDoc template, we cannot properly document this as both a function\n   * and a namespace, so its function signature is documented here.\n   *\n   * #### Arguments\n   * ##### *args\n   * Mixed[]\n   *\n   * Any combination of values that could be passed to `console.log()`.\n   *\n   * #### Return Value\n   *\n   * `undefined`\n   *\n   * @namespace\n   * @param    {Mixed[]} args\n   *           One or more messages or objects that should be logged.\n   */\n\n  var log = function log() {\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    logByType('log', level, args);\n  }; // This is the logByType helper that the logging methods below use\n\n\n  logByType = LogByTypeFactory(name, log);\n  /**\n   * Create a new sublogger which chains the old name to the new name.\n   *\n   * For example, doing `videojs.log.createLogger('player')` and then using that logger will log the following:\n   * ```js\n   *  mylogger('foo');\n   *  // > VIDEOJS: player: foo\n   * ```\n   *\n   * @param {string} name\n   *        The name to add call the new logger\n   * @return {Object}\n   */\n\n  log.createLogger = function (subname) {\n    return createLogger$1(name + ': ' + subname);\n  };\n  /**\n   * Enumeration of available logging levels, where the keys are the level names\n   * and the values are `|`-separated strings containing logging methods allowed\n   * in that logging level. These strings are used to create a regular expression\n   * matching the function name being called.\n   *\n   * Levels provided by Video.js are:\n   *\n   * - `off`: Matches no calls. Any value that can be cast to `false` will have\n   *   this effect. The most restrictive.\n   * - `all`: Matches only Video.js-provided functions (`debug`, `log`,\n   *   `log.warn`, and `log.error`).\n   * - `debug`: Matches `log.debug`, `log`, `log.warn`, and `log.error` calls.\n   * - `info` (default): Matches `log`, `log.warn`, and `log.error` calls.\n   * - `warn`: Matches `log.warn` and `log.error` calls.\n   * - `error`: Matches only `log.error` calls.\n   *\n   * @type {Object}\n   */\n\n\n  log.levels = {\n    all: 'debug|log|warn|error',\n    off: '',\n    debug: 'debug|log|warn|error',\n    info: 'log|warn|error',\n    warn: 'warn|error',\n    error: 'error',\n    DEFAULT: level\n  };\n  /**\n   * Get or set the current logging level.\n   *\n   * If a string matching a key from {@link module:log.levels} is provided, acts\n   * as a setter.\n   *\n   * @param  {string} [lvl]\n   *         Pass a valid level to set a new logging level.\n   *\n   * @return {string}\n   *         The current logging level.\n   */\n\n  log.level = function (lvl) {\n    if (typeof lvl === 'string') {\n      if (!log.levels.hasOwnProperty(lvl)) {\n        throw new Error(\"\\\"\" + lvl + \"\\\" in not a valid log level\");\n      }\n\n      level = lvl;\n    }\n\n    return level;\n  };\n  /**\n   * Returns an array containing everything that has been logged to the history.\n   *\n   * This array is a shallow clone of the internal history record. However, its\n   * contents are _not_ cloned; so, mutating objects inside this array will\n   * mutate them in history.\n   *\n   * @return {Array}\n   */\n\n\n  log.history = function () {\n    return history ? [].concat(history) : [];\n  };\n  /**\n   * Allows you to filter the history by the given logger name\n   *\n   * @param {string} fname\n   *        The name to filter by\n   *\n   * @return {Array}\n   *         The filtered list to return\n   */\n\n\n  log.history.filter = function (fname) {\n    return (history || []).filter(function (historyItem) {\n      // if the first item in each historyItem includes `fname`, then it's a match\n      return new RegExp(\".*\" + fname + \".*\").test(historyItem[0]);\n    });\n  };\n  /**\n   * Clears the internal history tracking, but does not prevent further history\n   * tracking.\n   */\n\n\n  log.history.clear = function () {\n    if (history) {\n      history.length = 0;\n    }\n  };\n  /**\n   * Disable history tracking if it is currently enabled.\n   */\n\n\n  log.history.disable = function () {\n    if (history !== null) {\n      history.length = 0;\n      history = null;\n    }\n  };\n  /**\n   * Enable history tracking if it is currently disabled.\n   */\n\n\n  log.history.enable = function () {\n    if (history === null) {\n      history = [];\n    }\n  };\n  /**\n   * Logs error messages. Similar to `console.error`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as an error\n   */\n\n\n  log.error = function () {\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    return logByType('error', level, args);\n  };\n  /**\n   * Logs warning messages. Similar to `console.warn`.\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as a warning.\n   */\n\n\n  log.warn = function () {\n    for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n      args[_key3] = arguments[_key3];\n    }\n\n    return logByType('warn', level, args);\n  };\n  /**\n   * Logs debug messages. Similar to `console.debug`, but may also act as a comparable\n   * log if `console.debug` is not available\n   *\n   * @param {Mixed[]} args\n   *        One or more messages or objects that should be logged as debug.\n   */\n\n\n  log.debug = function () {\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    return logByType('debug', level, args);\n  };\n\n  return log;\n}\n\n/**\n * @file log.js\n * @module log\n */\nvar log$1 = createLogger$1('VIDEOJS');\nvar createLogger = log$1.createLogger;\n\n/**\n * @file obj.js\n * @module obj\n */\n\n/**\n * @callback obj:EachCallback\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n */\n\n/**\n * @callback obj:ReduceCallback\n *\n * @param {Mixed} accum\n *        The value that is accumulating over the reduce loop.\n *\n * @param {Mixed} value\n *        The current key for the object that is being iterated over.\n *\n * @param {string} key\n *        The current key-value for object that is being iterated over\n *\n * @return {Mixed}\n *         The new accumulated value.\n */\nvar toString = Object.prototype.toString;\n/**\n * Get the keys of an Object\n *\n * @param {Object}\n *        The Object to get the keys from\n *\n * @return {string[]}\n *         An array of the keys from the object. Returns an empty array if the\n *         object passed in was invalid or had no keys.\n *\n * @private\n */\n\nvar keys = function keys(object) {\n  return isObject(object) ? Object.keys(object) : [];\n};\n/**\n * Array-like iteration for objects.\n *\n * @param {Object} object\n *        The object to iterate over\n *\n * @param {obj:EachCallback} fn\n *        The callback function which is called for each key in the object.\n */\n\n\nfunction each(object, fn) {\n  keys(object).forEach(function (key) {\n    return fn(object[key], key);\n  });\n}\n/**\n * Array-like reduce for objects.\n *\n * @param {Object} object\n *        The Object that you want to reduce.\n *\n * @param {Function} fn\n *         A callback function which is called for each key in the object. It\n *         receives the accumulated value and the per-iteration value and key\n *         as arguments.\n *\n * @param {Mixed} [initial = 0]\n *        Starting value\n *\n * @return {Mixed}\n *         The final accumulated value.\n */\n\nfunction reduce(object, fn, initial) {\n  if (initial === void 0) {\n    initial = 0;\n  }\n\n  return keys(object).reduce(function (accum, key) {\n    return fn(accum, object[key], key);\n  }, initial);\n}\n/**\n * Object.assign-style object shallow merge/extend.\n *\n * @param  {Object} target\n * @param  {Object} ...sources\n * @return {Object}\n */\n\nfunction assign(target) {\n  for (var _len = arguments.length, sources = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {\n    sources[_key - 1] = arguments[_key];\n  }\n\n  if (Object.assign) {\n    return _extends.apply(void 0, [target].concat(sources));\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      target[key] = value;\n    });\n  });\n  return target;\n}\n/**\n * Returns whether a value is an object of any kind - including DOM nodes,\n * arrays, regular expressions, etc. Not functions, though.\n *\n * This avoids the gotcha where using `typeof` on a `null` value\n * results in `'object'`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\nfunction isObject(value) {\n  return !!value && typeof value === 'object';\n}\n/**\n * Returns whether an object appears to be a \"plain\" object - that is, a\n * direct instance of `Object`.\n *\n * @param  {Object} value\n * @return {boolean}\n */\n\nfunction isPlain(value) {\n  return isObject(value) && toString.call(value) === '[object Object]' && value.constructor === Object;\n}\n\n/**\n * @file computed-style.js\n * @module computed-style\n */\n/**\n * A safe getComputedStyle.\n *\n * This is needed because in Firefox, if the player is loaded in an iframe with\n * `display:none`, then `getComputedStyle` returns `null`, so, we do a\n * null-check to make sure that the player doesn't break in these cases.\n *\n * @function\n * @param    {Element} el\n *           The element you want the computed style of\n *\n * @param    {string} prop\n *           The property name you want\n *\n * @see      https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n */\n\nfunction computedStyle(el, prop) {\n  if (!el || !prop) {\n    return '';\n  }\n\n  if (typeof window$1.getComputedStyle === 'function') {\n    var computedStyleValue;\n\n    try {\n      computedStyleValue = window$1.getComputedStyle(el);\n    } catch (e) {\n      return '';\n    }\n\n    return computedStyleValue ? computedStyleValue.getPropertyValue(prop) || computedStyleValue[prop] : '';\n  }\n\n  return '';\n}\n\n/**\n * @file browser.js\n * @module browser\n */\nvar USER_AGENT = window$1.navigator && window$1.navigator.userAgent || '';\nvar webkitVersionMap = /AppleWebKit\\/([\\d.]+)/i.exec(USER_AGENT);\nvar appleWebkitVersion = webkitVersionMap ? parseFloat(webkitVersionMap.pop()) : null;\n/**\n * Whether or not this device is an iPod.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPOD = /iPod/i.test(USER_AGENT);\n/**\n * The detected iOS version - or `null`.\n *\n * @static\n * @const\n * @type {string|null}\n */\n\nvar IOS_VERSION = function () {\n  var match = USER_AGENT.match(/OS (\\d+)_/i);\n\n  if (match && match[1]) {\n    return match[1];\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is an Android device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANDROID = /Android/i.test(USER_AGENT);\n/**\n * The detected Android version - or `null`.\n *\n * @static\n * @const\n * @type {number|string|null}\n */\n\nvar ANDROID_VERSION = function () {\n  // This matches Android Major.Minor.Patch versions\n  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned\n  var match = USER_AGENT.match(/Android (\\d+)(?:\\.(\\d+))?(?:\\.(\\d+))*/i);\n\n  if (!match) {\n    return null;\n  }\n\n  var major = match[1] && parseFloat(match[1]);\n  var minor = match[2] && parseFloat(match[2]);\n\n  if (major && minor) {\n    return parseFloat(match[1] + '.' + match[2]);\n  } else if (major) {\n    return major;\n  }\n\n  return null;\n}();\n/**\n * Whether or not this is a native Android browser.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_NATIVE_ANDROID = IS_ANDROID && ANDROID_VERSION < 5 && appleWebkitVersion < 537;\n/**\n * Whether or not this is Mozilla Firefox.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_FIREFOX = /Firefox/i.test(USER_AGENT);\n/**\n * Whether or not this is Microsoft Edge.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_EDGE = /Edg/i.test(USER_AGENT);\n/**\n * Whether or not this is Google Chrome.\n *\n * This will also be `true` for Chrome on iOS, which will have different support\n * as it is actually Safari under the hood.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_CHROME = !IS_EDGE && (/Chrome/i.test(USER_AGENT) || /CriOS/i.test(USER_AGENT));\n/**\n * The detected Google Chrome version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar CHROME_VERSION = function () {\n  var match = USER_AGENT.match(/(Chrome|CriOS)\\/(\\d+)/);\n\n  if (match && match[2]) {\n    return parseFloat(match[2]);\n  }\n\n  return null;\n}();\n/**\n * The detected Internet Explorer version - or `null`.\n *\n * @static\n * @const\n * @type {number|null}\n */\n\nvar IE_VERSION = function () {\n  var result = /MSIE\\s(\\d+)\\.\\d/.exec(USER_AGENT);\n  var version = result && parseFloat(result[1]);\n\n  if (!version && /Trident\\/7.0/i.test(USER_AGENT) && /rv:11.0/.test(USER_AGENT)) {\n    // IE 11 has a different user agent string than other IE versions\n    version = 11.0;\n  }\n\n  return version;\n}();\n/**\n * Whether or not this is desktop Safari.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_SAFARI = /Safari/i.test(USER_AGENT) && !IS_CHROME && !IS_ANDROID && !IS_EDGE;\n/**\n * Whether or not this is a Windows machine.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_WINDOWS = /Windows/i.test(USER_AGENT);\n/**\n * Whether or not this device is touch-enabled.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar TOUCH_ENABLED = Boolean(isReal() && ('ontouchstart' in window$1 || window$1.navigator.maxTouchPoints || window$1.DocumentTouch && window$1.document instanceof window$1.DocumentTouch));\n/**\n * Whether or not this device is an iPad.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IPAD = /iPad/i.test(USER_AGENT) || IS_SAFARI && TOUCH_ENABLED && !/iPhone/i.test(USER_AGENT);\n/**\n * Whether or not this device is an iPhone.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n// The Facebook app's UIWebView identifies as both an iPhone and iPad, so\n// to identify iPhones, we need to exclude iPads.\n// http://artsy.github.io/blog/2012/10/18/the-perils-of-ios-user-agent-sniffing/\n\nvar IS_IPHONE = /iPhone/i.test(USER_AGENT) && !IS_IPAD;\n/**\n * Whether or not this is an iOS device.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_IOS = IS_IPHONE || IS_IPAD || IS_IPOD;\n/**\n * Whether or not this is any flavor of Safari - including iOS.\n *\n * @static\n * @const\n * @type {Boolean}\n */\n\nvar IS_ANY_SAFARI = (IS_SAFARI || IS_IOS) && !IS_CHROME;\n\nvar browser = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  IS_IPOD: IS_IPOD,\n  IOS_VERSION: IOS_VERSION,\n  IS_ANDROID: IS_ANDROID,\n  ANDROID_VERSION: ANDROID_VERSION,\n  IS_NATIVE_ANDROID: IS_NATIVE_ANDROID,\n  IS_FIREFOX: IS_FIREFOX,\n  IS_EDGE: IS_EDGE,\n  IS_CHROME: IS_CHROME,\n  CHROME_VERSION: CHROME_VERSION,\n  IE_VERSION: IE_VERSION,\n  IS_SAFARI: IS_SAFARI,\n  IS_WINDOWS: IS_WINDOWS,\n  TOUCH_ENABLED: TOUCH_ENABLED,\n  IS_IPAD: IS_IPAD,\n  IS_IPHONE: IS_IPHONE,\n  IS_IOS: IS_IOS,\n  IS_ANY_SAFARI: IS_ANY_SAFARI\n});\n\n/**\n * @file dom.js\n * @module dom\n */\n/**\n * Detect if a value is a string with any non-whitespace characters.\n *\n * @private\n * @param  {string} str\n *         The string to check\n *\n * @return {boolean}\n *         Will be `true` if the string is non-blank, `false` otherwise.\n *\n */\n\nfunction isNonBlankString(str) {\n  // we use str.trim as it will trim any whitespace characters\n  // from the front or back of non-whitespace characters. aka\n  // Any string that contains non-whitespace characters will\n  // still contain them after `trim` but whitespace only strings\n  // will have a length of 0, failing this check.\n  return typeof str === 'string' && Boolean(str.trim());\n}\n/**\n * Throws an error if the passed string has whitespace. This is used by\n * class methods to be relatively consistent with the classList API.\n *\n * @private\n * @param  {string} str\n *         The string to check for whitespace.\n *\n * @throws {Error}\n *         Throws an error if there is whitespace in the string.\n */\n\n\nfunction throwIfWhitespace(str) {\n  // str.indexOf instead of regex because str.indexOf is faster performance wise.\n  if (str.indexOf(' ') >= 0) {\n    throw new Error('class has illegal whitespace characters');\n  }\n}\n/**\n * Produce a regular expression for matching a className within an elements className.\n *\n * @private\n * @param  {string} className\n *         The className to generate the RegExp for.\n *\n * @return {RegExp}\n *         The RegExp that will check for a specific `className` in an elements\n *         className.\n */\n\n\nfunction classRegExp(className) {\n  return new RegExp('(^|\\\\s)' + className + '($|\\\\s)');\n}\n/**\n * Whether the current DOM interface appears to be real (i.e. not simulated).\n *\n * @return {boolean}\n *         Will be `true` if the DOM appears to be real, `false` otherwise.\n */\n\n\nfunction isReal() {\n  // Both document and window will never be undefined thanks to `global`.\n  return document === window$1.document;\n}\n/**\n * Determines, via duck typing, whether or not a value is a DOM element.\n *\n * @param  {Mixed} value\n *         The value to check.\n *\n * @return {boolean}\n *         Will be `true` if the value is a DOM element, `false` otherwise.\n */\n\nfunction isEl(value) {\n  return isObject(value) && value.nodeType === 1;\n}\n/**\n * Determines if the current DOM is embedded in an iframe.\n *\n * @return {boolean}\n *         Will be `true` if the DOM is embedded in an iframe, `false`\n *         otherwise.\n */\n\nfunction isInFrame() {\n  // We need a try/catch here because Safari will throw errors when attempting\n  // to get either `parent` or `self`\n  try {\n    return window$1.parent !== window$1.self;\n  } catch (x) {\n    return true;\n  }\n}\n/**\n * Creates functions to query the DOM using a given method.\n *\n * @private\n * @param   {string} method\n *          The method to create the query with.\n *\n * @return  {Function}\n *          The query method\n */\n\nfunction createQuerier(method) {\n  return function (selector, context) {\n    if (!isNonBlankString(selector)) {\n      return document[method](null);\n    }\n\n    if (isNonBlankString(context)) {\n      context = document.querySelector(context);\n    }\n\n    var ctx = isEl(context) ? context : document;\n    return ctx[method] && ctx[method](selector);\n  };\n}\n/**\n * Creates an element and applies properties, attributes, and inserts content.\n *\n * @param  {string} [tagName='div']\n *         Name of tag to be created.\n *\n * @param  {Object} [properties={}]\n *         Element properties to be applied.\n *\n * @param  {Object} [attributes={}]\n *         Element attributes to be applied.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor object.\n *\n * @return {Element}\n *         The element that was created.\n */\n\n\nfunction createEl(tagName, properties, attributes, content) {\n  if (tagName === void 0) {\n    tagName = 'div';\n  }\n\n  if (properties === void 0) {\n    properties = {};\n  }\n\n  if (attributes === void 0) {\n    attributes = {};\n  }\n\n  var el = document.createElement(tagName);\n  Object.getOwnPropertyNames(properties).forEach(function (propName) {\n    var val = properties[propName]; // See #2176\n    // We originally were accepting both properties and attributes in the\n    // same object, but that doesn't work so well.\n\n    if (propName.indexOf('aria-') !== -1 || propName === 'role' || propName === 'type') {\n      log$1.warn('Setting attributes in the second argument of createEl()\\n' + 'has been deprecated. Use the third argument instead.\\n' + (\"createEl(type, properties, attributes). Attempting to set \" + propName + \" to \" + val + \".\"));\n      el.setAttribute(propName, val); // Handle textContent since it's not supported everywhere and we have a\n      // method for it.\n    } else if (propName === 'textContent') {\n      textContent(el, val);\n    } else if (el[propName] !== val || propName === 'tabIndex') {\n      el[propName] = val;\n    }\n  });\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    el.setAttribute(attrName, attributes[attrName]);\n  });\n\n  if (content) {\n    appendContent(el, content);\n  }\n\n  return el;\n}\n/**\n * Injects text into an element, replacing any existing contents entirely.\n *\n * @param  {Element} el\n *         The element to add text content into\n *\n * @param  {string} text\n *         The text content to add.\n *\n * @return {Element}\n *         The element with added text content.\n */\n\nfunction textContent(el, text) {\n  if (typeof el.textContent === 'undefined') {\n    el.innerText = text;\n  } else {\n    el.textContent = text;\n  }\n\n  return el;\n}\n/**\n * Insert an element as the first child node of another\n *\n * @param {Element} child\n *        Element to insert\n *\n * @param {Element} parent\n *        Element to insert child into\n */\n\nfunction prependTo(child, parent) {\n  if (parent.firstChild) {\n    parent.insertBefore(child, parent.firstChild);\n  } else {\n    parent.appendChild(child);\n  }\n}\n/**\n * Check if an element has a class name.\n *\n * @param  {Element} element\n *         Element to check\n *\n * @param  {string} classToCheck\n *         Class name to check for\n *\n * @return {boolean}\n *         Will be `true` if the element has a class, `false` otherwise.\n *\n * @throws {Error}\n *         Throws an error if `classToCheck` has white space.\n */\n\nfunction hasClass(element, classToCheck) {\n  throwIfWhitespace(classToCheck);\n\n  if (element.classList) {\n    return element.classList.contains(classToCheck);\n  }\n\n  return classRegExp(classToCheck).test(element.className);\n}\n/**\n * Add a class name to an element.\n *\n * @param  {Element} element\n *         Element to add class name to.\n *\n * @param  {string} classToAdd\n *         Class name to add.\n *\n * @return {Element}\n *         The DOM element with the added class name.\n */\n\nfunction addClass(element, classToAdd) {\n  if (element.classList) {\n    element.classList.add(classToAdd); // Don't need to `throwIfWhitespace` here because `hasElClass` will do it\n    // in the case of classList not being supported.\n  } else if (!hasClass(element, classToAdd)) {\n    element.className = (element.className + ' ' + classToAdd).trim();\n  }\n\n  return element;\n}\n/**\n * Remove a class name from an element.\n *\n * @param  {Element} element\n *         Element to remove a class name from.\n *\n * @param  {string} classToRemove\n *         Class name to remove\n *\n * @return {Element}\n *         The DOM element with class name removed.\n */\n\nfunction removeClass(element, classToRemove) {\n  // Protect in case the player gets disposed\n  if (!element) {\n    log$1.warn(\"removeClass was called with an element that doesn't exist\");\n    return null;\n  }\n\n  if (element.classList) {\n    element.classList.remove(classToRemove);\n  } else {\n    throwIfWhitespace(classToRemove);\n    element.className = element.className.split(/\\s+/).filter(function (c) {\n      return c !== classToRemove;\n    }).join(' ');\n  }\n\n  return element;\n}\n/**\n * The callback definition for toggleClass.\n *\n * @callback module:dom~PredicateCallback\n * @param    {Element} element\n *           The DOM element of the Component.\n *\n * @param    {string} classToToggle\n *           The `className` that wants to be toggled\n *\n * @return   {boolean|undefined}\n *           If `true` is returned, the `classToToggle` will be added to the\n *           `element`. If `false`, the `classToToggle` will be removed from\n *           the `element`. If `undefined`, the callback will be ignored.\n */\n\n/**\n * Adds or removes a class name to/from an element depending on an optional\n * condition or the presence/absence of the class name.\n *\n * @param  {Element} element\n *         The element to toggle a class name on.\n *\n * @param  {string} classToToggle\n *         The class that should be toggled.\n *\n * @param  {boolean|module:dom~PredicateCallback} [predicate]\n *         See the return value for {@link module:dom~PredicateCallback}\n *\n * @return {Element}\n *         The element with a class that has been toggled.\n */\n\nfunction toggleClass(element, classToToggle, predicate) {\n  // This CANNOT use `classList` internally because IE11 does not support the\n  // second parameter to the `classList.toggle()` method! Which is fine because\n  // `classList` will be used by the add/remove functions.\n  var has = hasClass(element, classToToggle);\n\n  if (typeof predicate === 'function') {\n    predicate = predicate(element, classToToggle);\n  }\n\n  if (typeof predicate !== 'boolean') {\n    predicate = !has;\n  } // If the necessary class operation matches the current state of the\n  // element, no action is required.\n\n\n  if (predicate === has) {\n    return;\n  }\n\n  if (predicate) {\n    addClass(element, classToToggle);\n  } else {\n    removeClass(element, classToToggle);\n  }\n\n  return element;\n}\n/**\n * Apply attributes to an HTML element.\n *\n * @param {Element} el\n *        Element to add attributes to.\n *\n * @param {Object} [attributes]\n *        Attributes to be applied.\n */\n\nfunction setAttributes(el, attributes) {\n  Object.getOwnPropertyNames(attributes).forEach(function (attrName) {\n    var attrValue = attributes[attrName];\n\n    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {\n      el.removeAttribute(attrName);\n    } else {\n      el.setAttribute(attrName, attrValue === true ? '' : attrValue);\n    }\n  });\n}\n/**\n * Get an element's attribute values, as defined on the HTML tag.\n *\n * Attributes are not the same as properties. They're defined on the tag\n * or with setAttribute.\n *\n * @param  {Element} tag\n *         Element from which to get tag attributes.\n *\n * @return {Object}\n *         All attributes of the element. Boolean attributes will be `true` or\n *         `false`, others will be strings.\n */\n\nfunction getAttributes(tag) {\n  var obj = {}; // known boolean attributes\n  // we can check for matching boolean properties, but not all browsers\n  // and not all tags know about these attributes, so, we still want to check them manually\n\n  var knownBooleans = ',' + 'autoplay,controls,playsinline,loop,muted,default,defaultMuted' + ',';\n\n  if (tag && tag.attributes && tag.attributes.length > 0) {\n    var attrs = tag.attributes;\n\n    for (var i = attrs.length - 1; i >= 0; i--) {\n      var attrName = attrs[i].name;\n      var attrVal = attrs[i].value; // check for known booleans\n      // the matching element property will return a value for typeof\n\n      if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(',' + attrName + ',') !== -1) {\n        // the value of an included boolean attribute is typically an empty\n        // string ('') which would equal false if we just check for a false value.\n        // we also don't want support bad code like autoplay='false'\n        attrVal = attrVal !== null ? true : false;\n      }\n\n      obj[attrName] = attrVal;\n    }\n  }\n\n  return obj;\n}\n/**\n * Get the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to get the value of.\n *\n * @return {string}\n *         The value of the attribute.\n */\n\nfunction getAttribute(el, attribute) {\n  return el.getAttribute(attribute);\n}\n/**\n * Set the value of an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to set.\n *\n * @param {string} value\n *        Value to set the attribute to.\n */\n\nfunction setAttribute(el, attribute, value) {\n  el.setAttribute(attribute, value);\n}\n/**\n * Remove an element's attribute.\n *\n * @param {Element} el\n *        A DOM element.\n *\n * @param {string} attribute\n *        Attribute to remove.\n */\n\nfunction removeAttribute(el, attribute) {\n  el.removeAttribute(attribute);\n}\n/**\n * Attempt to block the ability to select text.\n */\n\nfunction blockTextSelection() {\n  document.body.focus();\n\n  document.onselectstart = function () {\n    return false;\n  };\n}\n/**\n * Turn off text selection blocking.\n */\n\nfunction unblockTextSelection() {\n  document.onselectstart = function () {\n    return true;\n  };\n}\n/**\n * Identical to the native `getBoundingClientRect` function, but ensures that\n * the method is supported at all (it is in all browsers we claim to support)\n * and that the element is in the DOM before continuing.\n *\n * This wrapper function also shims properties which are not provided by some\n * older browsers (namely, IE8).\n *\n * Additionally, some browsers do not support adding properties to a\n * `ClientRect`/`DOMRect` object; so, we shallow-copy it with the standard\n * properties (except `x` and `y` which are not widely supported). This helps\n * avoid implementations where keys are non-enumerable.\n *\n * @param  {Element} el\n *         Element whose `ClientRect` we want to calculate.\n *\n * @return {Object|undefined}\n *         Always returns a plain object - or `undefined` if it cannot.\n */\n\nfunction getBoundingClientRect(el) {\n  if (el && el.getBoundingClientRect && el.parentNode) {\n    var rect = el.getBoundingClientRect();\n    var result = {};\n    ['bottom', 'height', 'left', 'right', 'top', 'width'].forEach(function (k) {\n      if (rect[k] !== undefined) {\n        result[k] = rect[k];\n      }\n    });\n\n    if (!result.height) {\n      result.height = parseFloat(computedStyle(el, 'height'));\n    }\n\n    if (!result.width) {\n      result.width = parseFloat(computedStyle(el, 'width'));\n    }\n\n    return result;\n  }\n}\n/**\n * Represents the position of a DOM element on the page.\n *\n * @typedef  {Object} module:dom~Position\n *\n * @property {number} left\n *           Pixels to the left.\n *\n * @property {number} top\n *           Pixels from the top.\n */\n\n/**\n * Get the position of an element in the DOM.\n *\n * Uses `getBoundingClientRect` technique from John Resig.\n *\n * @see http://ejohn.org/blog/getboundingclientrect-is-awesome/\n *\n * @param  {Element} el\n *         Element from which to get offset.\n *\n * @return {module:dom~Position}\n *         The position of the element that was passed in.\n */\n\nfunction findPosition(el) {\n  if (!el || el && !el.offsetParent) {\n    return {\n      left: 0,\n      top: 0,\n      width: 0,\n      height: 0\n    };\n  }\n\n  var width = el.offsetWidth;\n  var height = el.offsetHeight;\n  var left = 0;\n  var top = 0;\n\n  while (el.offsetParent && el !== document[FullscreenApi.fullscreenElement]) {\n    left += el.offsetLeft;\n    top += el.offsetTop;\n    el = el.offsetParent;\n  }\n\n  return {\n    left: left,\n    top: top,\n    width: width,\n    height: height\n  };\n}\n/**\n * Represents x and y coordinates for a DOM element or mouse pointer.\n *\n * @typedef  {Object} module:dom~Coordinates\n *\n * @property {number} x\n *           x coordinate in pixels\n *\n * @property {number} y\n *           y coordinate in pixels\n */\n\n/**\n * Get the pointer position within an element.\n *\n * The base on the coordinates are the bottom left of the element.\n *\n * @param  {Element} el\n *         Element on which to get the pointer position on.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {module:dom~Coordinates}\n *         A coordinates object corresponding to the mouse position.\n *\n */\n\nfunction getPointerPosition(el, event) {\n  var translated = {\n    x: 0,\n    y: 0\n  };\n\n  if (IS_IOS) {\n    var item = el;\n\n    while (item && item.nodeName.toLowerCase() !== 'html') {\n      var transform = computedStyle(item, 'transform');\n\n      if (/^matrix/.test(transform)) {\n        var values = transform.slice(7, -1).split(/,\\s/).map(Number);\n        translated.x += values[4];\n        translated.y += values[5];\n      } else if (/^matrix3d/.test(transform)) {\n        var _values = transform.slice(9, -1).split(/,\\s/).map(Number);\n\n        translated.x += _values[12];\n        translated.y += _values[13];\n      }\n\n      item = item.parentNode;\n    }\n  }\n\n  var position = {};\n  var boxTarget = findPosition(event.target);\n  var box = findPosition(el);\n  var boxW = box.width;\n  var boxH = box.height;\n  var offsetY = event.offsetY - (box.top - boxTarget.top);\n  var offsetX = event.offsetX - (box.left - boxTarget.left);\n\n  if (event.changedTouches) {\n    offsetX = event.changedTouches[0].pageX - box.left;\n    offsetY = event.changedTouches[0].pageY + box.top;\n\n    if (IS_IOS) {\n      offsetX -= translated.x;\n      offsetY -= translated.y;\n    }\n  }\n\n  position.y = 1 - Math.max(0, Math.min(1, offsetY / boxH));\n  position.x = Math.max(0, Math.min(1, offsetX / boxW));\n  return position;\n}\n/**\n * Determines, via duck typing, whether or not a value is a text node.\n *\n * @param  {Mixed} value\n *         Check if this value is a text node.\n *\n * @return {boolean}\n *         Will be `true` if the value is a text node, `false` otherwise.\n */\n\nfunction isTextNode(value) {\n  return isObject(value) && value.nodeType === 3;\n}\n/**\n * Empties the contents of an element.\n *\n * @param  {Element} el\n *         The element to empty children from\n *\n * @return {Element}\n *         The element with no children\n */\n\nfunction emptyEl(el) {\n  while (el.firstChild) {\n    el.removeChild(el.firstChild);\n  }\n\n  return el;\n}\n/**\n * This is a mixed value that describes content to be injected into the DOM\n * via some method. It can be of the following types:\n *\n * Type       | Description\n * -----------|-------------\n * `string`   | The value will be normalized into a text node.\n * `Element`  | The value will be accepted as-is.\n * `TextNode` | The value will be accepted as-is.\n * `Array`    | A one-dimensional array of strings, elements, text nodes, or functions. These functions should return a string, element, or text node (any other return value, like an array, will be ignored).\n * `Function` | A function, which is expected to return a string, element, text node, or array - any of the other possible values described above. This means that a content descriptor could be a function that returns an array of functions, but those second-level functions must return strings, elements, or text nodes.\n *\n * @typedef {string|Element|TextNode|Array|Function} module:dom~ContentDescriptor\n */\n\n/**\n * Normalizes content for eventual insertion into the DOM.\n *\n * This allows a wide range of content definition methods, but helps protect\n * from falling into the trap of simply writing to `innerHTML`, which could\n * be an XSS concern.\n *\n * The content for an element can be passed in multiple types and\n * combinations, whose behavior is as follows:\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Array}\n *         All of the content that was passed in, normalized to an array of\n *         elements or text nodes.\n */\n\nfunction normalizeContent(content) {\n  // First, invoke content if it is a function. If it produces an array,\n  // that needs to happen before normalization.\n  if (typeof content === 'function') {\n    content = content();\n  } // Next up, normalize to an array, so one or many items can be normalized,\n  // filtered, and returned.\n\n\n  return (Array.isArray(content) ? content : [content]).map(function (value) {\n    // First, invoke value if it is a function to produce a new value,\n    // which will be subsequently normalized to a Node of some kind.\n    if (typeof value === 'function') {\n      value = value();\n    }\n\n    if (isEl(value) || isTextNode(value)) {\n      return value;\n    }\n\n    if (typeof value === 'string' && /\\S/.test(value)) {\n      return document.createTextNode(value);\n    }\n  }).filter(function (value) {\n    return value;\n  });\n}\n/**\n * Normalizes and appends content to an element.\n *\n * @param  {Element} el\n *         Element to append normalized content to.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with appended normalized content.\n */\n\nfunction appendContent(el, content) {\n  normalizeContent(content).forEach(function (node) {\n    return el.appendChild(node);\n  });\n  return el;\n}\n/**\n * Normalizes and inserts content into an element; this is identical to\n * `appendContent()`, except it empties the element first.\n *\n * @param {Element} el\n *        Element to insert normalized content into.\n *\n * @param {module:dom~ContentDescriptor} content\n *        A content descriptor value.\n *\n * @return {Element}\n *         The element with inserted normalized content.\n */\n\nfunction insertContent(el, content) {\n  return appendContent(emptyEl(el), content);\n}\n/**\n * Check if an event was a single left click.\n *\n * @param  {EventTarget~Event} event\n *         Event object.\n *\n * @return {boolean}\n *         Will be `true` if a single left click, `false` otherwise.\n */\n\nfunction isSingleLeftClick(event) {\n  // Note: if you create something draggable, be sure to\n  // call it on both `mousedown` and `mousemove` event,\n  // otherwise `mousedown` should be enough for a button\n  if (event.button === undefined && event.buttons === undefined) {\n    // Why do we need `buttons` ?\n    // Because, middle mouse sometimes have this:\n    // e.button === 0 and e.buttons === 4\n    // Furthermore, we want to prevent combination click, something like\n    // HOLD middlemouse then left click, that would be\n    // e.button === 0, e.buttons === 5\n    // just `button` is not gonna work\n    // Alright, then what this block does ?\n    // this is for chrome `simulate mobile devices`\n    // I want to support this as well\n    return true;\n  }\n\n  if (event.button === 0 && event.buttons === undefined) {\n    // Touch screen, sometimes on some specific device, `buttons`\n    // doesn't have anything (safari on ios, blackberry...)\n    return true;\n  } // `mouseup` event on a single left click has\n  // `button` and `buttons` equal to 0\n\n\n  if (event.type === 'mouseup' && event.button === 0 && event.buttons === 0) {\n    return true;\n  }\n\n  if (event.button !== 0 || event.buttons !== 1) {\n    // This is the reason we have those if else block above\n    // if any special case we can catch and let it slide\n    // we do it above, when get to here, this definitely\n    // is-not-left-click\n    return false;\n  }\n\n  return true;\n}\n/**\n * Finds a single DOM element matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelector`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {Element|null}\n *         The element that was found or null.\n */\n\nvar $ = createQuerier('querySelector');\n/**\n * Finds a all DOM elements matching `selector` within the optional\n * `context` of another DOM element (defaulting to `document`).\n *\n * @param  {string} selector\n *         A valid CSS selector, which will be passed to `querySelectorAll`.\n *\n * @param  {Element|String} [context=document]\n *         A DOM element within which to query. Can also be a selector\n *         string in which case the first matching element will be used\n *         as context. If missing (or no element matches selector), falls\n *         back to `document`.\n *\n * @return {NodeList}\n *         A element list of elements that were found. Will be empty if none\n *         were found.\n *\n */\n\nvar $$ = createQuerier('querySelectorAll');\n\nvar Dom = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  isReal: isReal,\n  isEl: isEl,\n  isInFrame: isInFrame,\n  createEl: createEl,\n  textContent: textContent,\n  prependTo: prependTo,\n  hasClass: hasClass,\n  addClass: addClass,\n  removeClass: removeClass,\n  toggleClass: toggleClass,\n  setAttributes: setAttributes,\n  getAttributes: getAttributes,\n  getAttribute: getAttribute,\n  setAttribute: setAttribute,\n  removeAttribute: removeAttribute,\n  blockTextSelection: blockTextSelection,\n  unblockTextSelection: unblockTextSelection,\n  getBoundingClientRect: getBoundingClientRect,\n  findPosition: findPosition,\n  getPointerPosition: getPointerPosition,\n  isTextNode: isTextNode,\n  emptyEl: emptyEl,\n  normalizeContent: normalizeContent,\n  appendContent: appendContent,\n  insertContent: insertContent,\n  isSingleLeftClick: isSingleLeftClick,\n  $: $,\n  $$: $$\n});\n\n/**\n * @file setup.js - Functions for setting up a player without\n * user interaction based on the data-setup `attribute` of the video tag.\n *\n * @module setup\n */\nvar _windowLoaded = false;\nvar videojs$1;\n/**\n * Set up any tags that have a data-setup `attribute` when the player is started.\n */\n\nvar autoSetup = function autoSetup() {\n  if (videojs$1.options.autoSetup === false) {\n    return;\n  }\n\n  var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));\n  var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));\n  var divs = Array.prototype.slice.call(document.getElementsByTagName('video-js'));\n  var mediaEls = vids.concat(audios, divs); // Check if any media elements exist\n\n  if (mediaEls && mediaEls.length > 0) {\n    for (var i = 0, e = mediaEls.length; i < e; i++) {\n      var mediaEl = mediaEls[i]; // Check if element exists, has getAttribute func.\n\n      if (mediaEl && mediaEl.getAttribute) {\n        // Make sure this player hasn't already been set up.\n        if (mediaEl.player === undefined) {\n          var options = mediaEl.getAttribute('data-setup'); // Check if data-setup attr exists.\n          // We only auto-setup if they've added the data-setup attr.\n\n          if (options !== null) {\n            // Create new video.js instance.\n            videojs$1(mediaEl);\n          }\n        } // If getAttribute isn't defined, we need to wait for the DOM.\n\n      } else {\n        autoSetupTimeout(1);\n        break;\n      }\n    } // No videos were found, so keep looping unless page is finished loading.\n\n  } else if (!_windowLoaded) {\n    autoSetupTimeout(1);\n  }\n};\n/**\n * Wait until the page is loaded before running autoSetup. This will be called in\n * autoSetup if `hasLoaded` returns false.\n *\n * @param {number} wait\n *        How long to wait in ms\n *\n * @param {module:videojs} [vjs]\n *        The videojs library function\n */\n\n\nfunction autoSetupTimeout(wait, vjs) {\n  // Protect against breakage in non-browser environments\n  if (!isReal()) {\n    return;\n  }\n\n  if (vjs) {\n    videojs$1 = vjs;\n  }\n\n  window$1.setTimeout(autoSetup, wait);\n}\n/**\n * Used to set the internal tracking of window loaded state to true.\n *\n * @private\n */\n\n\nfunction setWindowLoaded() {\n  _windowLoaded = true;\n  window$1.removeEventListener('load', setWindowLoaded);\n}\n\nif (isReal()) {\n  if (document.readyState === 'complete') {\n    setWindowLoaded();\n  } else {\n    /**\n     * Listen for the load event on window, and set _windowLoaded to true.\n     *\n     * We use a standard event listener here to avoid incrementing the GUID\n     * before any players are created.\n     *\n     * @listens load\n     */\n    window$1.addEventListener('load', setWindowLoaded);\n  }\n}\n\n/**\n * @file stylesheet.js\n * @module stylesheet\n */\n/**\n * Create a DOM syle element given a className for it.\n *\n * @param {string} className\n *        The className to add to the created style element.\n *\n * @return {Element}\n *         The element that was created.\n */\n\nvar createStyleElement = function createStyleElement(className) {\n  var style = document.createElement('style');\n  style.className = className;\n  return style;\n};\n/**\n * Add text to a DOM element.\n *\n * @param {Element} el\n *        The Element to add text content to.\n *\n * @param {string} content\n *        The text to add to the element.\n */\n\nvar setTextContent = function setTextContent(el, content) {\n  if (el.styleSheet) {\n    el.styleSheet.cssText = content;\n  } else {\n    el.textContent = content;\n  }\n};\n\n/**\n * @file guid.js\n * @module guid\n */\n// Default value for GUIDs. This allows us to reset the GUID counter in tests.\n//\n// The initial GUID is 3 because some users have come to rely on the first\n// default player ID ending up as `vjs_video_3`.\n//\n// See: https://github.com/videojs/video.js/pull/6216\nvar _initialGuid = 3;\n/**\n * Unique ID for an element or function\n *\n * @type {Number}\n */\n\nvar _guid = _initialGuid;\n/**\n * Get a unique auto-incrementing ID by number that has not been returned before.\n *\n * @return {number}\n *         A new unique ID.\n */\n\nfunction newGUID() {\n  return _guid++;\n}\n\n/**\n * @file dom-data.js\n * @module dom-data\n */\nvar FakeWeakMap;\n\nif (!window$1.WeakMap) {\n  FakeWeakMap = /*#__PURE__*/function () {\n    function FakeWeakMap() {\n      this.vdata = 'vdata' + Math.floor(window$1.performance && window$1.performance.now() || Date.now());\n      this.data = {};\n    }\n\n    var _proto = FakeWeakMap.prototype;\n\n    _proto.set = function set(key, value) {\n      var access = key[this.vdata] || newGUID();\n\n      if (!key[this.vdata]) {\n        key[this.vdata] = access;\n      }\n\n      this.data[access] = value;\n      return this;\n    };\n\n    _proto.get = function get(key) {\n      var access = key[this.vdata]; // we have data, return it\n\n      if (access) {\n        return this.data[access];\n      } // we don't have data, return nothing.\n      // return undefined explicitly as that's the contract for this method\n\n\n      log$1('We have no data for this element', key);\n      return undefined;\n    };\n\n    _proto.has = function has(key) {\n      var access = key[this.vdata];\n      return access in this.data;\n    };\n\n    _proto[\"delete\"] = function _delete(key) {\n      var access = key[this.vdata];\n\n      if (access) {\n        delete this.data[access];\n        delete key[this.vdata];\n      }\n    };\n\n    return FakeWeakMap;\n  }();\n}\n/**\n * Element Data Store.\n *\n * Allows for binding data to an element without putting it directly on the\n * element. Ex. Event listeners are stored here.\n * (also from jsninja.com, slightly modified and updated for closure compiler)\n *\n * @type {Object}\n * @private\n */\n\n\nvar DomData = window$1.WeakMap ? new WeakMap() : new FakeWeakMap();\n\n/**\n * @file events.js. An Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)\n * (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)\n * This should work very similarly to jQuery's events, however it's based off the book version which isn't as\n * robust as jquery's, so there's probably some differences.\n *\n * @file events.js\n * @module events\n */\n/**\n * Clean up the listener cache and dispatchers\n *\n * @param {Element|Object} elem\n *        Element to clean up\n *\n * @param {string} type\n *        Type of event to clean up\n */\n\nfunction _cleanUpEvents(elem, type) {\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // Remove the events of a particular type if there are none left\n\n  if (data.handlers[type].length === 0) {\n    delete data.handlers[type]; // data.handlers[type] = null;\n    // Setting to null was causing an error with data.handlers\n    // Remove the meta-handler from the element\n\n    if (elem.removeEventListener) {\n      elem.removeEventListener(type, data.dispatcher, false);\n    } else if (elem.detachEvent) {\n      elem.detachEvent('on' + type, data.dispatcher);\n    }\n  } // Remove the events object if there are no types left\n\n\n  if (Object.getOwnPropertyNames(data.handlers).length <= 0) {\n    delete data.handlers;\n    delete data.dispatcher;\n    delete data.disabled;\n  } // Finally remove the element data if there is no data left\n\n\n  if (Object.getOwnPropertyNames(data).length === 0) {\n    DomData[\"delete\"](elem);\n  }\n}\n/**\n * Loops through an array of event types and calls the requested method for each type.\n *\n * @param {Function} fn\n *        The event method we want to use.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} callback\n *        Event listener.\n */\n\n\nfunction _handleMultipleEvents(fn, elem, types, callback) {\n  types.forEach(function (type) {\n    // Call the event method for each one of the types\n    fn(elem, type, callback);\n  });\n}\n/**\n * Fix a native event to have standard property values\n *\n * @param {Object} event\n *        Event object to fix.\n *\n * @return {Object}\n *         Fixed event object.\n */\n\n\nfunction fixEvent(event) {\n  if (event.fixed_) {\n    return event;\n  }\n\n  function returnTrue() {\n    return true;\n  }\n\n  function returnFalse() {\n    return false;\n  } // Test if fixing up is needed\n  // Used to check if !event.stopPropagation instead of isPropagationStopped\n  // But native events return true for stopPropagation, but don't have\n  // other expected methods like isPropagationStopped. Seems to be a problem\n  // with the Javascript Ninja code. So we're just overriding all events now.\n\n\n  if (!event || !event.isPropagationStopped || !event.isImmediatePropagationStopped) {\n    var old = event || window$1.event;\n    event = {}; // Clone the old object so that we can modify the values event = {};\n    // IE8 Doesn't like when you mess with native event properties\n    // Firefox returns false for event.hasOwnProperty('type') and other props\n    //  which makes copying more difficult.\n    // TODO: Probably best to create a whitelist of event props\n\n    for (var key in old) {\n      // Safari 6.0.3 warns you if you try to copy deprecated layerX/Y\n      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation\n      // and webkitMovementX/Y\n      // Lighthouse complains if Event.path is copied\n      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation' && key !== 'webkitMovementX' && key !== 'webkitMovementY' && key !== 'path') {\n        // Chrome 32+ warns if you try to copy deprecated returnValue, but\n        // we still want to if preventDefault isn't supported (IE8).\n        if (!(key === 'returnValue' && old.preventDefault)) {\n          event[key] = old[key];\n        }\n      }\n    } // The event occurred on this element\n\n\n    if (!event.target) {\n      event.target = event.srcElement || document;\n    } // Handle which other element the event is related to\n\n\n    if (!event.relatedTarget) {\n      event.relatedTarget = event.fromElement === event.target ? event.toElement : event.fromElement;\n    } // Stop the default browser action\n\n\n    event.preventDefault = function () {\n      if (old.preventDefault) {\n        old.preventDefault();\n      }\n\n      event.returnValue = false;\n      old.returnValue = false;\n      event.defaultPrevented = true;\n    };\n\n    event.defaultPrevented = false; // Stop the event from bubbling\n\n    event.stopPropagation = function () {\n      if (old.stopPropagation) {\n        old.stopPropagation();\n      }\n\n      event.cancelBubble = true;\n      old.cancelBubble = true;\n      event.isPropagationStopped = returnTrue;\n    };\n\n    event.isPropagationStopped = returnFalse; // Stop the event from bubbling and executing other handlers\n\n    event.stopImmediatePropagation = function () {\n      if (old.stopImmediatePropagation) {\n        old.stopImmediatePropagation();\n      }\n\n      event.isImmediatePropagationStopped = returnTrue;\n      event.stopPropagation();\n    };\n\n    event.isImmediatePropagationStopped = returnFalse; // Handle mouse position\n\n    if (event.clientX !== null && event.clientX !== undefined) {\n      var doc = document.documentElement;\n      var body = document.body;\n      event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc && doc.clientLeft || body && body.clientLeft || 0);\n      event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc && doc.clientTop || body && body.clientTop || 0);\n    } // Handle key presses\n\n\n    event.which = event.charCode || event.keyCode; // Fix button for mouse clicks:\n    // 0 == left; 1 == middle; 2 == right\n\n    if (event.button !== null && event.button !== undefined) {\n      // The following is disabled because it does not pass videojs-standard\n      // and... yikes.\n\n      /* eslint-disable */\n      event.button = event.button & 1 ? 0 : event.button & 4 ? 1 : event.button & 2 ? 2 : 0;\n      /* eslint-enable */\n    }\n  }\n\n  event.fixed_ = true; // Returns fixed-up instance\n\n  return event;\n}\n/**\n * Whether passive event listeners are supported\n */\n\nvar _supportsPassive;\n\nvar supportsPassive = function supportsPassive() {\n  if (typeof _supportsPassive !== 'boolean') {\n    _supportsPassive = false;\n\n    try {\n      var opts = Object.defineProperty({}, 'passive', {\n        get: function get() {\n          _supportsPassive = true;\n        }\n      });\n      window$1.addEventListener('test', null, opts);\n      window$1.removeEventListener('test', null, opts);\n    } catch (e) {// disregard\n    }\n  }\n\n  return _supportsPassive;\n};\n/**\n * Touch events Chrome expects to be passive\n */\n\n\nvar passiveEvents = ['touchstart', 'touchmove'];\n/**\n * Add an event listener to element\n * It stores the handler function in a separate cache object\n * and adds a generic handler to the element's event,\n * along with a unique id (guid) to the element.\n *\n * @param {Element|Object} elem\n *        Element or object to bind listeners to\n *\n * @param {string|string[]} type\n *        Type of event to bind to.\n *\n * @param {EventTarget~EventListener} fn\n *        Event listener.\n */\n\nfunction on(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(on, elem, type, fn);\n  }\n\n  if (!DomData.has(elem)) {\n    DomData.set(elem, {});\n  }\n\n  var data = DomData.get(elem); // We need a place to store all our handler data\n\n  if (!data.handlers) {\n    data.handlers = {};\n  }\n\n  if (!data.handlers[type]) {\n    data.handlers[type] = [];\n  }\n\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  }\n\n  data.handlers[type].push(fn);\n\n  if (!data.dispatcher) {\n    data.disabled = false;\n\n    data.dispatcher = function (event, hash) {\n      if (data.disabled) {\n        return;\n      }\n\n      event = fixEvent(event);\n      var handlers = data.handlers[event.type];\n\n      if (handlers) {\n        // Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.\n        var handlersCopy = handlers.slice(0);\n\n        for (var m = 0, n = handlersCopy.length; m < n; m++) {\n          if (event.isImmediatePropagationStopped()) {\n            break;\n          } else {\n            try {\n              handlersCopy[m].call(elem, event, hash);\n            } catch (e) {\n              log$1.error(e);\n            }\n          }\n        }\n      }\n    };\n  }\n\n  if (data.handlers[type].length === 1) {\n    if (elem.addEventListener) {\n      var options = false;\n\n      if (supportsPassive() && passiveEvents.indexOf(type) > -1) {\n        options = {\n          passive: true\n        };\n      }\n\n      elem.addEventListener(type, data.dispatcher, options);\n    } else if (elem.attachEvent) {\n      elem.attachEvent('on' + type, data.dispatcher);\n    }\n  }\n}\n/**\n * Removes event listeners from an element\n *\n * @param {Element|Object} elem\n *        Object to remove listeners from.\n *\n * @param {string|string[]} [type]\n *        Type of listener to remove. Don't include to remove all events from element.\n *\n * @param {EventTarget~EventListener} [fn]\n *        Specific listener to remove. Don't include to remove listeners for an event\n *        type.\n */\n\nfunction off(elem, type, fn) {\n  // Don't want to add a cache object through getElData if not needed\n  if (!DomData.has(elem)) {\n    return;\n  }\n\n  var data = DomData.get(elem); // If no events exist, nothing to unbind\n\n  if (!data.handlers) {\n    return;\n  }\n\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(off, elem, type, fn);\n  } // Utility function\n\n\n  var removeType = function removeType(el, t) {\n    data.handlers[t] = [];\n\n    _cleanUpEvents(el, t);\n  }; // Are we removing all bound events?\n\n\n  if (type === undefined) {\n    for (var t in data.handlers) {\n      if (Object.prototype.hasOwnProperty.call(data.handlers || {}, t)) {\n        removeType(elem, t);\n      }\n    }\n\n    return;\n  }\n\n  var handlers = data.handlers[type]; // If no handlers exist, nothing to unbind\n\n  if (!handlers) {\n    return;\n  } // If no listener was provided, remove all listeners for type\n\n\n  if (!fn) {\n    removeType(elem, type);\n    return;\n  } // We're only removing a single handler\n\n\n  if (fn.guid) {\n    for (var n = 0; n < handlers.length; n++) {\n      if (handlers[n].guid === fn.guid) {\n        handlers.splice(n--, 1);\n      }\n    }\n  }\n\n  _cleanUpEvents(elem, type);\n}\n/**\n * Trigger an event for an element\n *\n * @param {Element|Object} elem\n *        Element to trigger an event on\n *\n * @param {EventTarget~Event|string} event\n *        A string (the type) or an event object with a type attribute\n *\n * @param {Object} [hash]\n *        data hash to pass along with the event\n *\n * @return {boolean|undefined}\n *         Returns the opposite of `defaultPrevented` if default was\n *         prevented. Otherwise, returns `undefined`\n */\n\nfunction trigger(elem, event, hash) {\n  // Fetches element data and a reference to the parent (for bubbling).\n  // Don't want to add a data object to cache for every parent,\n  // so checking hasElData first.\n  var elemData = DomData.has(elem) ? DomData.get(elem) : {};\n  var parent = elem.parentNode || elem.ownerDocument; // type = event.type || event,\n  // handler;\n  // If an event name was passed as a string, creates an event out of it\n\n  if (typeof event === 'string') {\n    event = {\n      type: event,\n      target: elem\n    };\n  } else if (!event.target) {\n    event.target = elem;\n  } // Normalizes the event properties.\n\n\n  event = fixEvent(event); // If the passed element has a dispatcher, executes the established handlers.\n\n  if (elemData.dispatcher) {\n    elemData.dispatcher.call(elem, event, hash);\n  } // Unless explicitly stopped or the event does not bubble (e.g. media events)\n  // recursively calls this function to bubble the event up the DOM.\n\n\n  if (parent && !event.isPropagationStopped() && event.bubbles === true) {\n    trigger.call(null, parent, event, hash); // If at the top of the DOM, triggers the default action unless disabled.\n  } else if (!parent && !event.defaultPrevented && event.target && event.target[event.type]) {\n    if (!DomData.has(event.target)) {\n      DomData.set(event.target, {});\n    }\n\n    var targetData = DomData.get(event.target); // Checks if the target has a default action for this event.\n\n    if (event.target[event.type]) {\n      // Temporarily disables event dispatching on the target as we have already executed the handler.\n      targetData.disabled = true; // Executes the default action.\n\n      if (typeof event.target[event.type] === 'function') {\n        event.target[event.type]();\n      } // Re-enables event dispatching.\n\n\n      targetData.disabled = false;\n    }\n  } // Inform the triggerer if the default was prevented by returning false\n\n\n  return !event.defaultPrevented;\n}\n/**\n * Trigger a listener only once for an event.\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\nfunction one(elem, type, fn) {\n  if (Array.isArray(type)) {\n    return _handleMultipleEvents(one, elem, type, fn);\n  }\n\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID();\n  on(elem, type, func);\n}\n/**\n * Trigger a listener only once and then turn if off for all\n * configured events\n *\n * @param {Element|Object} elem\n *        Element or object to bind to.\n *\n * @param {string|string[]} type\n *        Name/type of event\n *\n * @param {Event~EventListener} fn\n *        Event listener function\n */\n\nfunction any(elem, type, fn) {\n  var func = function func() {\n    off(elem, type, func);\n    fn.apply(this, arguments);\n  }; // copy the guid to the new function so it can removed using the original function's ID\n\n\n  func.guid = fn.guid = fn.guid || newGUID(); // multiple ons, but one off for everything\n\n  on(elem, type, func);\n}\n\nvar Events = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  fixEvent: fixEvent,\n  on: on,\n  off: off,\n  trigger: trigger,\n  one: one,\n  any: any\n});\n\n/**\n * @file fn.js\n * @module fn\n */\nvar UPDATE_REFRESH_INTERVAL = 30;\n/**\n * Bind (a.k.a proxy or context). A simple method for changing the context of\n * a function.\n *\n * It also stores a unique id on the function so it can be easily removed from\n * events.\n *\n * @function\n * @param    {Mixed} context\n *           The object to bind as scope.\n *\n * @param    {Function} fn\n *           The function to be bound to a scope.\n *\n * @param    {number} [uid]\n *           An optional unique ID for the function to be set\n *\n * @return   {Function}\n *           The new function that will be bound into the context given\n */\n\nvar bind = function bind(context, fn, uid) {\n  // Make sure the function has a unique ID\n  if (!fn.guid) {\n    fn.guid = newGUID();\n  } // Create the new function that changes the context\n\n\n  var bound = fn.bind(context); // Allow for the ability to individualize this function\n  // Needed in the case where multiple objects might share the same prototype\n  // IF both items add an event listener with the same function, then you try to remove just one\n  // it will remove both because they both have the same guid.\n  // when using this, you need to use the bind method when you remove the listener as well.\n  // currently used in text tracks\n\n  bound.guid = uid ? uid + '_' + fn.guid : fn.guid;\n  return bound;\n};\n/**\n * Wraps the given function, `fn`, with a new function that only invokes `fn`\n * at most once per every `wait` milliseconds.\n *\n * @function\n * @param    {Function} fn\n *           The function to be throttled.\n *\n * @param    {number}   wait\n *           The number of milliseconds by which to throttle.\n *\n * @return   {Function}\n */\n\nvar throttle = function throttle(fn, wait) {\n  var last = window$1.performance.now();\n\n  var throttled = function throttled() {\n    var now = window$1.performance.now();\n\n    if (now - last >= wait) {\n      fn.apply(void 0, arguments);\n      last = now;\n    }\n  };\n\n  return throttled;\n};\n/**\n * Creates a debounced function that delays invoking `func` until after `wait`\n * milliseconds have elapsed since the last time the debounced function was\n * invoked.\n *\n * Inspired by lodash and underscore implementations.\n *\n * @function\n * @param    {Function} func\n *           The function to wrap with debounce behavior.\n *\n * @param    {number} wait\n *           The number of milliseconds to wait after the last invocation.\n *\n * @param    {boolean} [immediate]\n *           Whether or not to invoke the function immediately upon creation.\n *\n * @param    {Object} [context=window]\n *           The \"context\" in which the debounced function should debounce. For\n *           example, if this function should be tied to a Video.js player,\n *           the player can be passed here. Alternatively, defaults to the\n *           global `window` object.\n *\n * @return   {Function}\n *           A debounced function.\n */\n\nvar debounce = function debounce(func, wait, immediate, context) {\n  if (context === void 0) {\n    context = window$1;\n  }\n\n  var timeout;\n\n  var cancel = function cancel() {\n    context.clearTimeout(timeout);\n    timeout = null;\n  };\n  /* eslint-disable consistent-this */\n\n\n  var debounced = function debounced() {\n    var self = this;\n    var args = arguments;\n\n    var _later = function later() {\n      timeout = null;\n      _later = null;\n\n      if (!immediate) {\n        func.apply(self, args);\n      }\n    };\n\n    if (!timeout && immediate) {\n      func.apply(self, args);\n    }\n\n    context.clearTimeout(timeout);\n    timeout = context.setTimeout(_later, wait);\n  };\n  /* eslint-enable consistent-this */\n\n\n  debounced.cancel = cancel;\n  return debounced;\n};\n\n/**\n * @file src/js/event-target.js\n */\n/**\n * `EventTarget` is a class that can have the same API as the DOM `EventTarget`. It\n * adds shorthand functions that wrap around lengthy functions. For example:\n * the `on` function is a wrapper around `addEventListener`.\n *\n * @see [EventTarget Spec]{@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget}\n * @class EventTarget\n */\n\nvar EventTarget$2 = function EventTarget() {};\n/**\n * A Custom DOM event.\n *\n * @typedef {Object} EventTarget~Event\n * @see [Properties]{@link https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent}\n */\n\n/**\n * All event listeners should follow the following format.\n *\n * @callback EventTarget~EventListener\n * @this {EventTarget}\n *\n * @param {EventTarget~Event} event\n *        the event that triggered this function\n *\n * @param {Object} [hash]\n *        hash of data sent during the event\n */\n\n/**\n * An object containing event names as keys and booleans as values.\n *\n * > NOTE: If an event name is set to a true value here {@link EventTarget#trigger}\n *         will have extra functionality. See that function for more information.\n *\n * @property EventTarget.prototype.allowedEvents_\n * @private\n */\n\n\nEventTarget$2.prototype.allowedEvents_ = {};\n/**\n * Adds an `event listener` to an instance of an `EventTarget`. An `event listener` is a\n * function that will get called when an event with a certain name gets triggered.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to call with `EventTarget`s\n */\n\nEventTarget$2.prototype.on = function (type, fn) {\n  // Remove the addEventListener alias before calling Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  on(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * An alias of {@link EventTarget#on}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#on}\n */\n\n\nEventTarget$2.prototype.addEventListener = EventTarget$2.prototype.on;\n/**\n * Removes an `event listener` for a specific event from an instance of `EventTarget`.\n * This makes it so that the `event listener` will no longer get called when the\n * named event happens.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to remove.\n */\n\nEventTarget$2.prototype.off = function (type, fn) {\n  off(this, type, fn);\n};\n/**\n * An alias of {@link EventTarget#off}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#off}\n */\n\n\nEventTarget$2.prototype.removeEventListener = EventTarget$2.prototype.off;\n/**\n * This function will add an `event listener` that gets triggered only once. After the\n * first trigger it will get removed. This is like adding an `event listener`\n * with {@link EventTarget#on} that calls {@link EventTarget#off} on itself.\n *\n * @param {string|string[]} type\n *        An event name or an array of event names.\n *\n * @param {EventTarget~EventListener} fn\n *        The function to be called once for each event name.\n */\n\nEventTarget$2.prototype.one = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  one(this, type, fn);\n  this.addEventListener = ael;\n};\n\nEventTarget$2.prototype.any = function (type, fn) {\n  // Remove the addEventListener aliasing Events.on\n  // so we don't get into an infinite type loop\n  var ael = this.addEventListener;\n\n  this.addEventListener = function () {};\n\n  any(this, type, fn);\n  this.addEventListener = ael;\n};\n/**\n * This function causes an event to happen. This will then cause any `event listeners`\n * that are waiting for that event, to get called. If there are no `event listeners`\n * for an event then nothing will happen.\n *\n * If the name of the `Event` that is being triggered is in `EventTarget.allowedEvents_`.\n * Trigger will also call the `on` + `uppercaseEventName` function.\n *\n * Example:\n * 'click' is in `EventTarget.allowedEvents_`, so, trigger will attempt to call\n * `onClick` if it exists.\n *\n * @param {string|EventTarget~Event|Object} event\n *        The name of the event, an `Event`, or an object with a key of type set to\n *        an event name.\n */\n\n\nEventTarget$2.prototype.trigger = function (event) {\n  var type = event.type || event; // deprecation\n  // In a future version we should default target to `this`\n  // similar to how we default the target to `elem` in\n  // `Events.trigger`. Right now the default `target` will be\n  // `document` due to the `Event.fixEvent` call.\n\n  if (typeof event === 'string') {\n    event = {\n      type: type\n    };\n  }\n\n  event = fixEvent(event);\n\n  if (this.allowedEvents_[type] && this['on' + type]) {\n    this['on' + type](event);\n  }\n\n  trigger(this, event);\n};\n/**\n * An alias of {@link EventTarget#trigger}. Allows `EventTarget` to mimic\n * the standard DOM API.\n *\n * @function\n * @see {@link EventTarget#trigger}\n */\n\n\nEventTarget$2.prototype.dispatchEvent = EventTarget$2.prototype.trigger;\nvar EVENT_MAP;\n\nEventTarget$2.prototype.queueTrigger = function (event) {\n  var _this = this;\n\n  // only set up EVENT_MAP if it'll be used\n  if (!EVENT_MAP) {\n    EVENT_MAP = new Map();\n  }\n\n  var type = event.type || event;\n  var map = EVENT_MAP.get(this);\n\n  if (!map) {\n    map = new Map();\n    EVENT_MAP.set(this, map);\n  }\n\n  var oldTimeout = map.get(type);\n  map[\"delete\"](type);\n  window$1.clearTimeout(oldTimeout);\n  var timeout = window$1.setTimeout(function () {\n    map[\"delete\"](type); // if we cleared out all timeouts for the current target, delete its map\n\n    if (map.size === 0) {\n      map = null;\n      EVENT_MAP[\"delete\"](_this);\n    }\n\n    _this.trigger(event);\n  }, 0);\n  map.set(type, timeout);\n};\n\n/**\n * @file mixins/evented.js\n * @module evented\n */\n\nvar objName = function objName(obj) {\n  if (typeof obj.name === 'function') {\n    return obj.name();\n  }\n\n  if (typeof obj.name === 'string') {\n    return obj.name;\n  }\n\n  if (obj.name_) {\n    return obj.name_;\n  }\n\n  if (obj.constructor && obj.constructor.name) {\n    return obj.constructor.name;\n  }\n\n  return typeof obj;\n};\n/**\n * Returns whether or not an object has had the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to test.\n *\n * @return {boolean}\n *         Whether or not the object appears to be evented.\n */\n\n\nvar isEvented = function isEvented(object) {\n  return object instanceof EventTarget$2 || !!object.eventBusEl_ && ['on', 'one', 'off', 'trigger'].every(function (k) {\n    return typeof object[k] === 'function';\n  });\n};\n/**\n * Adds a callback to run after the evented mixin applied.\n *\n * @param  {Object} object\n *         An object to Add\n * @param  {Function} callback\n *         The callback to run.\n */\n\n\nvar addEventedCallback = function addEventedCallback(target, callback) {\n  if (isEvented(target)) {\n    callback();\n  } else {\n    if (!target.eventedCallbacks) {\n      target.eventedCallbacks = [];\n    }\n\n    target.eventedCallbacks.push(callback);\n  }\n};\n/**\n * Whether a value is a valid event type - non-empty string or array.\n *\n * @private\n * @param  {string|Array} type\n *         The type value to test.\n *\n * @return {boolean}\n *         Whether or not the type is a valid event type.\n */\n\n\nvar isValidEventType = function isValidEventType(type) {\n  return (// The regex here verifies that the `type` contains at least one non-\n    // whitespace character.\n    typeof type === 'string' && /\\S/.test(type) || Array.isArray(type) && !!type.length\n  );\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the target does not appear to be a valid event target.\n *\n * @param  {Object} target\n *         The object to test.\n *\n * @param  {Object} obj\n *         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateTarget = function validateTarget(target, obj, fnName) {\n  if (!target || !target.nodeName && !isEvented(target)) {\n    throw new Error(\"Invalid target for \" + objName(obj) + \"#\" + fnName + \"; must be a DOM node or evented object.\");\n  }\n};\n/**\n * Validates a value to determine if it is a valid event target. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the type does not appear to be a valid event type.\n *\n * @param  {string|Array} type\n *         The type to test.\n *\n * @param  {Object} obj\n*         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateEventType = function validateEventType(type, obj, fnName) {\n  if (!isValidEventType(type)) {\n    throw new Error(\"Invalid event type for \" + objName(obj) + \"#\" + fnName + \"; must be a non-empty string or array.\");\n  }\n};\n/**\n * Validates a value to determine if it is a valid listener. Throws if not.\n *\n * @private\n * @throws {Error}\n *         If the listener is not a function.\n *\n * @param  {Function} listener\n *         The listener to test.\n *\n * @param  {Object} obj\n *         The evented object we are validating for\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n */\n\n\nvar validateListener = function validateListener(listener, obj, fnName) {\n  if (typeof listener !== 'function') {\n    throw new Error(\"Invalid listener for \" + objName(obj) + \"#\" + fnName + \"; must be a function.\");\n  }\n};\n/**\n * Takes an array of arguments given to `on()` or `one()`, validates them, and\n * normalizes them into an object.\n *\n * @private\n * @param  {Object} self\n *         The evented object on which `on()` or `one()` was called. This\n *         object will be bound as the `this` value for the listener.\n *\n * @param  {Array} args\n *         An array of arguments passed to `on()` or `one()`.\n *\n * @param  {string} fnName\n *         The name of the evented mixin function that called this.\n *\n * @return {Object}\n *         An object containing useful values for `on()` or `one()` calls.\n */\n\n\nvar normalizeListenArgs = function normalizeListenArgs(self, args, fnName) {\n  // If the number of arguments is less than 3, the target is always the\n  // evented object itself.\n  var isTargetingSelf = args.length < 3 || args[0] === self || args[0] === self.eventBusEl_;\n  var target;\n  var type;\n  var listener;\n\n  if (isTargetingSelf) {\n    target = self.eventBusEl_; // Deal with cases where we got 3 arguments, but we are still listening to\n    // the evented object itself.\n\n    if (args.length >= 3) {\n      args.shift();\n    }\n\n    type = args[0];\n    listener = args[1];\n  } else {\n    target = args[0];\n    type = args[1];\n    listener = args[2];\n  }\n\n  validateTarget(target, self, fnName);\n  validateEventType(type, self, fnName);\n  validateListener(listener, self, fnName);\n  listener = bind(self, listener);\n  return {\n    isTargetingSelf: isTargetingSelf,\n    target: target,\n    type: type,\n    listener: listener\n  };\n};\n/**\n * Adds the listener to the event type(s) on the target, normalizing for\n * the type of target.\n *\n * @private\n * @param  {Element|Object} target\n *         A DOM node or evented object.\n *\n * @param  {string} method\n *         The event binding method to use (\"on\" or \"one\").\n *\n * @param  {string|Array} type\n *         One or more event type(s).\n *\n * @param  {Function} listener\n *         A listener function.\n */\n\n\nvar listen = function listen(target, method, type, listener) {\n  validateTarget(target, target, method);\n\n  if (target.nodeName) {\n    Events[method](target, type, listener);\n  } else {\n    target[method](type, listener);\n  }\n};\n/**\n * Contains methods that provide event capabilities to an object which is passed\n * to {@link module:evented|evented}.\n *\n * @mixin EventedMixin\n */\n\n\nvar EventedMixin = {\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  on: function on() {\n    var _this = this;\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var _normalizeListenArgs = normalizeListenArgs(this, args, 'on'),\n        isTargetingSelf = _normalizeListenArgs.isTargetingSelf,\n        target = _normalizeListenArgs.target,\n        type = _normalizeListenArgs.type,\n        listener = _normalizeListenArgs.listener;\n\n    listen(target, 'on', type, listener); // If this object is listening to another evented object.\n\n    if (!isTargetingSelf) {\n      // If this object is disposed, remove the listener.\n      var removeListenerOnDispose = function removeListenerOnDispose() {\n        return _this.off(target, type, listener);\n      }; // Use the same function ID as the listener so we can remove it later it\n      // using the ID of the original listener.\n\n\n      removeListenerOnDispose.guid = listener.guid; // Add a listener to the target's dispose event as well. This ensures\n      // that if the target is disposed BEFORE this object, we remove the\n      // removal listener that was just added. Otherwise, we create a memory leak.\n\n      var removeRemoverOnTargetDispose = function removeRemoverOnTargetDispose() {\n        return _this.off('dispose', removeListenerOnDispose);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      removeRemoverOnTargetDispose.guid = listener.guid;\n      listen(this, 'on', 'dispose', removeListenerOnDispose);\n      listen(target, 'on', 'dispose', removeRemoverOnTargetDispose);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will be called once per event and then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  one: function one() {\n    var _this2 = this;\n\n    for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n      args[_key2] = arguments[_key2];\n    }\n\n    var _normalizeListenArgs2 = normalizeListenArgs(this, args, 'one'),\n        isTargetingSelf = _normalizeListenArgs2.isTargetingSelf,\n        target = _normalizeListenArgs2.target,\n        type = _normalizeListenArgs2.type,\n        listener = _normalizeListenArgs2.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'one', type, listener); // Targeting another evented object.\n    } else {\n      // TODO: This wrapper is incorrect! It should only\n      //       remove the wrapper for the event type that called it.\n      //       Instead all listners are removed on the first trigger!\n      //       see https://github.com/videojs/video.js/issues/5962\n      var wrapper = function wrapper() {\n        _this2.off(target, type, wrapper);\n\n        for (var _len3 = arguments.length, largs = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {\n          largs[_key3] = arguments[_key3];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'one', type, wrapper);\n    }\n  },\n\n  /**\n   * Add a listener to an event (or events) on this object or another evented\n   * object. The listener will only be called once for the first event that is triggered\n   * then removed.\n   *\n   * @param  {string|Array|Element|Object} targetOrType\n   *         If this is a string or array, it represents the event type(s)\n   *         that will trigger the listener.\n   *\n   *         Another evented object can be passed here instead, which will\n   *         cause the listener to listen for events on _that_ object.\n   *\n   *         In either case, the listener's `this` value will be bound to\n   *         this object.\n   *\n   * @param  {string|Array|Function} typeOrListener\n   *         If the first argument was a string or array, this should be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function.\n   */\n  any: function any() {\n    var _this3 = this;\n\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n\n    var _normalizeListenArgs3 = normalizeListenArgs(this, args, 'any'),\n        isTargetingSelf = _normalizeListenArgs3.isTargetingSelf,\n        target = _normalizeListenArgs3.target,\n        type = _normalizeListenArgs3.type,\n        listener = _normalizeListenArgs3.listener; // Targeting this evented object.\n\n\n    if (isTargetingSelf) {\n      listen(target, 'any', type, listener); // Targeting another evented object.\n    } else {\n      var wrapper = function wrapper() {\n        _this3.off(target, type, wrapper);\n\n        for (var _len5 = arguments.length, largs = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {\n          largs[_key5] = arguments[_key5];\n        }\n\n        listener.apply(null, largs);\n      }; // Use the same function ID as the listener so we can remove it later\n      // it using the ID of the original listener.\n\n\n      wrapper.guid = listener.guid;\n      listen(target, 'any', type, wrapper);\n    }\n  },\n\n  /**\n   * Removes listener(s) from event(s) on an evented object.\n   *\n   * @param  {string|Array|Element|Object} [targetOrType]\n   *         If this is a string or array, it represents the event type(s).\n   *\n   *         Another evented object can be passed here instead, in which case\n   *         ALL 3 arguments are _required_.\n   *\n   * @param  {string|Array|Function} [typeOrListener]\n   *         If the first argument was a string or array, this may be the\n   *         listener function. Otherwise, this is a string or array of event\n   *         type(s).\n   *\n   * @param  {Function} [listener]\n   *         If the first argument was another evented object, this will be\n   *         the listener function; otherwise, _all_ listeners bound to the\n   *         event type(s) will be removed.\n   */\n  off: function off$1(targetOrType, typeOrListener, listener) {\n    // Targeting this evented object.\n    if (!targetOrType || isValidEventType(targetOrType)) {\n      off(this.eventBusEl_, targetOrType, typeOrListener); // Targeting another evented object.\n    } else {\n      var target = targetOrType;\n      var type = typeOrListener; // Fail fast and in a meaningful way!\n\n      validateTarget(target, this, 'off');\n      validateEventType(type, this, 'off');\n      validateListener(listener, this, 'off'); // Ensure there's at least a guid, even if the function hasn't been used\n\n      listener = bind(this, listener); // Remove the dispose listener on this evented object, which was given\n      // the same guid as the event listener in on().\n\n      this.off('dispose', listener);\n\n      if (target.nodeName) {\n        off(target, type, listener);\n        off(target, 'dispose', listener);\n      } else if (isEvented(target)) {\n        target.off(type, listener);\n        target.off('dispose', listener);\n      }\n    }\n  },\n\n  /**\n   * Fire an event on this evented object, causing its listeners to be called.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash]\n   *          An additional object to pass along to listeners.\n   *\n   * @return {boolean}\n   *          Whether or not the default behavior was prevented.\n   */\n  trigger: function trigger$1(event, hash) {\n    validateTarget(this.eventBusEl_, this, 'trigger');\n    var type = event && typeof event !== 'string' ? event.type : event;\n\n    if (!isValidEventType(type)) {\n      var error = \"Invalid event type for \" + objName(this) + \"#trigger; \" + 'must be a non-empty string or object with a type key that has a non-empty value.';\n\n      if (event) {\n        (this.log || log$1).error(error);\n      } else {\n        throw new Error(error);\n      }\n    }\n\n    return trigger(this.eventBusEl_, event, hash);\n  }\n};\n/**\n * Applies {@link module:evented~EventedMixin|EventedMixin} to a target object.\n *\n * @param  {Object} target\n *         The object to which to add event methods.\n *\n * @param  {Object} [options={}]\n *         Options for customizing the mixin behavior.\n *\n * @param  {string} [options.eventBusKey]\n *         By default, adds a `eventBusEl_` DOM element to the target object,\n *         which is used as an event bus. If the target object already has a\n *         DOM element that should be used, pass its key here.\n *\n * @return {Object}\n *         The target object.\n */\n\nfunction evented(target, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var _options = options,\n      eventBusKey = _options.eventBusKey; // Set or create the eventBusEl_.\n\n  if (eventBusKey) {\n    if (!target[eventBusKey].nodeName) {\n      throw new Error(\"The eventBusKey \\\"\" + eventBusKey + \"\\\" does not refer to an element.\");\n    }\n\n    target.eventBusEl_ = target[eventBusKey];\n  } else {\n    target.eventBusEl_ = createEl('span', {\n      className: 'vjs-event-bus'\n    });\n  }\n\n  assign(target, EventedMixin);\n\n  if (target.eventedCallbacks) {\n    target.eventedCallbacks.forEach(function (callback) {\n      callback();\n    });\n  } // When any evented object is disposed, it removes all its listeners.\n\n\n  target.on('dispose', function () {\n    target.off();\n    [target, target.el_, target.eventBusEl_].forEach(function (val) {\n      if (val && DomData.has(val)) {\n        DomData[\"delete\"](val);\n      }\n    });\n    window$1.setTimeout(function () {\n      target.eventBusEl_ = null;\n    }, 0);\n  });\n  return target;\n}\n\n/**\n * @file mixins/stateful.js\n * @module stateful\n */\n/**\n * Contains methods that provide statefulness to an object which is passed\n * to {@link module:stateful}.\n *\n * @mixin StatefulMixin\n */\n\nvar StatefulMixin = {\n  /**\n   * A hash containing arbitrary keys and values representing the state of\n   * the object.\n   *\n   * @type {Object}\n   */\n  state: {},\n\n  /**\n   * Set the state of an object by mutating its\n   * {@link module:stateful~StatefulMixin.state|state} object in place.\n   *\n   * @fires   module:stateful~StatefulMixin#statechanged\n   * @param   {Object|Function} stateUpdates\n   *          A new set of properties to shallow-merge into the plugin state.\n   *          Can be a plain object or a function returning a plain object.\n   *\n   * @return {Object|undefined}\n   *          An object containing changes that occurred. If no changes\n   *          occurred, returns `undefined`.\n   */\n  setState: function setState(stateUpdates) {\n    var _this = this;\n\n    // Support providing the `stateUpdates` state as a function.\n    if (typeof stateUpdates === 'function') {\n      stateUpdates = stateUpdates();\n    }\n\n    var changes;\n    each(stateUpdates, function (value, key) {\n      // Record the change if the value is different from what's in the\n      // current state.\n      if (_this.state[key] !== value) {\n        changes = changes || {};\n        changes[key] = {\n          from: _this.state[key],\n          to: value\n        };\n      }\n\n      _this.state[key] = value;\n    }); // Only trigger \"statechange\" if there were changes AND we have a trigger\n    // function. This allows us to not require that the target object be an\n    // evented object.\n\n    if (changes && isEvented(this)) {\n      /**\n       * An event triggered on an object that is both\n       * {@link module:stateful|stateful} and {@link module:evented|evented}\n       * indicating that its state has changed.\n       *\n       * @event    module:stateful~StatefulMixin#statechanged\n       * @type     {Object}\n       * @property {Object} changes\n       *           A hash containing the properties that were changed and\n       *           the values they were changed `from` and `to`.\n       */\n      this.trigger({\n        changes: changes,\n        type: 'statechanged'\n      });\n    }\n\n    return changes;\n  }\n};\n/**\n * Applies {@link module:stateful~StatefulMixin|StatefulMixin} to a target\n * object.\n *\n * If the target object is {@link module:evented|evented} and has a\n * `handleStateChanged` method, that method will be automatically bound to the\n * `statechanged` event on itself.\n *\n * @param   {Object} target\n *          The object to be made stateful.\n *\n * @param   {Object} [defaultState]\n *          A default set of properties to populate the newly-stateful object's\n *          `state` property.\n *\n * @return {Object}\n *          Returns the `target`.\n */\n\nfunction stateful(target, defaultState) {\n  assign(target, StatefulMixin); // This happens after the mixing-in because we need to replace the `state`\n  // added in that step.\n\n  target.state = assign({}, target.state, defaultState); // Auto-bind the `handleStateChanged` method of the target object if it exists.\n\n  if (typeof target.handleStateChanged === 'function' && isEvented(target)) {\n    target.on('statechanged', target.handleStateChanged);\n  }\n\n  return target;\n}\n\n/**\n * @file string-cases.js\n * @module to-lower-case\n */\n\n/**\n * Lowercase the first letter of a string.\n *\n * @param {string} string\n *        String to be lowercased\n *\n * @return {string}\n *         The string with a lowercased first letter\n */\nvar toLowerCase = function toLowerCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toLowerCase();\n  });\n};\n/**\n * Uppercase the first letter of a string.\n *\n * @param {string} string\n *        String to be uppercased\n *\n * @return {string}\n *         The string with an uppercased first letter\n */\n\nvar toTitleCase$1 = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n/**\n * Compares the TitleCase versions of the two strings for equality.\n *\n * @param {string} str1\n *        The first string to compare\n *\n * @param {string} str2\n *        The second string to compare\n *\n * @return {boolean}\n *         Whether the TitleCase versions of the strings are equal\n */\n\nvar titleCaseEquals = function titleCaseEquals(str1, str2) {\n  return toTitleCase$1(str1) === toTitleCase$1(str2);\n};\n\n/**\n * @file merge-options.js\n * @module merge-options\n */\n/**\n * Merge two objects recursively.\n *\n * Performs a deep merge like\n * {@link https://lodash.com/docs/4.17.10#merge|lodash.merge}, but only merges\n * plain objects (not arrays, elements, or anything else).\n *\n * Non-plain object values will be copied directly from the right-most\n * argument.\n *\n * @static\n * @param   {Object[]} sources\n *          One or more objects to merge into a new object.\n *\n * @return {Object}\n *          A new object that is the merged result of all sources.\n */\n\nfunction mergeOptions$3() {\n  var result = {};\n\n  for (var _len = arguments.length, sources = new Array(_len), _key = 0; _key < _len; _key++) {\n    sources[_key] = arguments[_key];\n  }\n\n  sources.forEach(function (source) {\n    if (!source) {\n      return;\n    }\n\n    each(source, function (value, key) {\n      if (!isPlain(value)) {\n        result[key] = value;\n        return;\n      }\n\n      if (!isPlain(result[key])) {\n        result[key] = {};\n      }\n\n      result[key] = mergeOptions$3(result[key], value);\n    });\n  });\n  return result;\n}\n\nvar MapSham = /*#__PURE__*/function () {\n  function MapSham() {\n    this.map_ = {};\n  }\n\n  var _proto = MapSham.prototype;\n\n  _proto.has = function has(key) {\n    return key in this.map_;\n  };\n\n  _proto[\"delete\"] = function _delete(key) {\n    var has = this.has(key);\n    delete this.map_[key];\n    return has;\n  };\n\n  _proto.set = function set(key, value) {\n    this.map_[key] = value;\n    return this;\n  };\n\n  _proto.forEach = function forEach(callback, thisArg) {\n    for (var key in this.map_) {\n      callback.call(thisArg, this.map_[key], key, this);\n    }\n  };\n\n  return MapSham;\n}();\n\nvar Map$1 = window$1.Map ? window$1.Map : MapSham;\n\nvar SetSham = /*#__PURE__*/function () {\n  function SetSham() {\n    this.set_ = {};\n  }\n\n  var _proto = SetSham.prototype;\n\n  _proto.has = function has(key) {\n    return key in this.set_;\n  };\n\n  _proto[\"delete\"] = function _delete(key) {\n    var has = this.has(key);\n    delete this.set_[key];\n    return has;\n  };\n\n  _proto.add = function add(key) {\n    this.set_[key] = 1;\n    return this;\n  };\n\n  _proto.forEach = function forEach(callback, thisArg) {\n    for (var key in this.set_) {\n      callback.call(thisArg, key, key, this);\n    }\n  };\n\n  return SetSham;\n}();\n\nvar Set$1 = window$1.Set ? window$1.Set : SetSham;\n\n/**\n * Player Component - Base class for all UI objects\n *\n * @file component.js\n */\n/**\n * Base class for all UI Components.\n * Components are UI objects which represent both a javascript object and an element\n * in the DOM. They can be children of other components, and can have\n * children themselves.\n *\n * Components can also use methods from {@link EventTarget}\n */\n\nvar Component$1 = /*#__PURE__*/function () {\n  /**\n   * A callback that is called when a component is ready. Does not have any\n   * paramters and any callback value will be ignored.\n   *\n   * @callback Component~ReadyCallback\n   * @this Component\n   */\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of component options.\n   *\n   * @param {Object[]} [options.children]\n   *        An array of children objects to intialize this component with. Children objects have\n   *        a name property that will be used if more than one component of the same type needs to be\n   *        added.\n   *\n   * @param  {string} [options.className]\n   *         A class or space separated list of classes to add the component\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Function that gets called when the `Component` is ready.\n   */\n  function Component(player, options, ready) {\n    var _this = this;\n\n    // The component might be the player itself and we can't pass `this` to super\n    if (!player && this.play) {\n      this.player_ = player = this; // eslint-disable-line\n    } else {\n      this.player_ = player;\n    }\n\n    this.isDisposed_ = false; // Hold the reference to the parent component via `addChild` method\n\n    this.parentComponent_ = null; // Make a copy of prototype.options_ to protect against overriding defaults\n\n    this.options_ = mergeOptions$3({}, this.options_); // Updated options with supplied options\n\n    options = this.options_ = mergeOptions$3(this.options_, options); // Get ID from options or options element if one is supplied\n\n    this.id_ = options.id || options.el && options.el.id; // If there was no ID from the options, generate one\n\n    if (!this.id_) {\n      // Don't require the player ID function in the case of mock players\n      var id = player && player.id && player.id() || 'no_player';\n      this.id_ = id + \"_component_\" + newGUID();\n    }\n\n    this.name_ = options.name || null; // Create element if one wasn't provided in options\n\n    if (options.el) {\n      this.el_ = options.el;\n    } else if (options.createEl !== false) {\n      this.el_ = this.createEl();\n    }\n\n    if (options.className && this.el_) {\n      options.className.split(' ').forEach(function (c) {\n        return _this.addClass(c);\n      });\n    } // if evented is anything except false, we want to mixin in evented\n\n\n    if (options.evented !== false) {\n      // Make this an evented object and use `el_`, if available, as its event bus\n      evented(this, {\n        eventBusKey: this.el_ ? 'el_' : null\n      });\n      this.handleLanguagechange = this.handleLanguagechange.bind(this);\n      this.on(this.player_, 'languagechange', this.handleLanguagechange);\n    }\n\n    stateful(this, this.constructor.defaultState);\n    this.children_ = [];\n    this.childIndex_ = {};\n    this.childNameIndex_ = {};\n    this.setTimeoutIds_ = new Set$1();\n    this.setIntervalIds_ = new Set$1();\n    this.rafIds_ = new Set$1();\n    this.namedRafs_ = new Map$1();\n    this.clearingTimersOnDispose_ = false; // Add any child components in options\n\n    if (options.initChildren !== false) {\n      this.initChildren();\n    } // Don't want to trigger ready here or it will go before init is actually\n    // finished for all children that run this constructor\n\n\n    this.ready(ready);\n\n    if (options.reportTouchActivity !== false) {\n      this.enableTouchActivity();\n    }\n  }\n  /**\n   * Dispose of the `Component` and all child components.\n   *\n   * @fires Component#dispose\n   *\n   * @param {Object} options\n   * @param {Element} options.originalEl element with which to replace player element\n   */\n\n\n  var _proto = Component.prototype;\n\n  _proto.dispose = function dispose(options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    // Bail out if the component has already been disposed.\n    if (this.isDisposed_) {\n      return;\n    }\n\n    if (this.readyQueue_) {\n      this.readyQueue_.length = 0;\n    }\n    /**\n     * Triggered when a `Component` is disposed.\n     *\n     * @event Component#dispose\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the dispose event does not\n     *           bubble up\n     */\n\n\n    this.trigger({\n      type: 'dispose',\n      bubbles: false\n    });\n    this.isDisposed_ = true; // Dispose all children.\n\n    if (this.children_) {\n      for (var i = this.children_.length - 1; i >= 0; i--) {\n        if (this.children_[i].dispose) {\n          this.children_[i].dispose();\n        }\n      }\n    } // Delete child references\n\n\n    this.children_ = null;\n    this.childIndex_ = null;\n    this.childNameIndex_ = null;\n    this.parentComponent_ = null;\n\n    if (this.el_) {\n      // Remove element from DOM\n      if (this.el_.parentNode) {\n        if (options.restoreEl) {\n          this.el_.parentNode.replaceChild(options.restoreEl, this.el_);\n        } else {\n          this.el_.parentNode.removeChild(this.el_);\n        }\n      }\n\n      this.el_ = null;\n    } // remove reference to the player after disposing of the element\n\n\n    this.player_ = null;\n  }\n  /**\n   * Determine whether or not this component has been disposed.\n   *\n   * @return {boolean}\n   *         If the component has been disposed, will be `true`. Otherwise, `false`.\n   */\n  ;\n\n  _proto.isDisposed = function isDisposed() {\n    return Boolean(this.isDisposed_);\n  }\n  /**\n   * Return the {@link Player} that the `Component` has attached to.\n   *\n   * @return {Player}\n   *         The player that this `Component` has attached to.\n   */\n  ;\n\n  _proto.player = function player() {\n    return this.player_;\n  }\n  /**\n   * Deep merge of options objects with new options.\n   * > Note: When both `obj` and `options` contain properties whose values are objects.\n   *         The two properties get merged using {@link module:mergeOptions}\n   *\n   * @param {Object} obj\n   *        The object that contains new options.\n   *\n   * @return {Object}\n   *         A new object of `this.options_` and `obj` merged together.\n   */\n  ;\n\n  _proto.options = function options(obj) {\n    if (!obj) {\n      return this.options_;\n    }\n\n    this.options_ = mergeOptions$3(this.options_, obj);\n    return this.options_;\n  }\n  /**\n   * Get the `Component`s DOM element\n   *\n   * @return {Element}\n   *         The DOM element for this `Component`.\n   */\n  ;\n\n  _proto.el = function el() {\n    return this.el_;\n  }\n  /**\n   * Create the `Component`s DOM element.\n   *\n   * @param {string} [tagName]\n   *        Element's DOM node type. e.g. 'div'\n   *\n   * @param {Object} [properties]\n   *        An object of properties that should be set.\n   *\n   * @param {Object} [attributes]\n   *        An object of attributes that should be set.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1(tagName, properties, attributes) {\n    return createEl(tagName, properties, attributes);\n  }\n  /**\n   * Localize a string given the string in english.\n   *\n   * If tokens are provided, it'll try and run a simple token replacement on the provided string.\n   * The tokens it looks for look like `{1}` with the index being 1-indexed into the tokens array.\n   *\n   * If a `defaultValue` is provided, it'll use that over `string`,\n   * if a value isn't found in provided language files.\n   * This is useful if you want to have a descriptive key for token replacement\n   * but have a succinct localized string and not require `en.json` to be included.\n   *\n   * Currently, it is used for the progress bar timing.\n   * ```js\n   * {\n   *   \"progress bar timing: currentTime={1} duration={2}\": \"{1} of {2}\"\n   * }\n   * ```\n   * It is then used like so:\n   * ```js\n   * this.localize('progress bar timing: currentTime={1} duration{2}',\n   *               [this.player_.currentTime(), this.player_.duration()],\n   *               '{1} of {2}');\n   * ```\n   *\n   * Which outputs something like: `01:23 of 24:56`.\n   *\n   *\n   * @param {string} string\n   *        The string to localize and the key to lookup in the language files.\n   * @param {string[]} [tokens]\n   *        If the current item has token replacements, provide the tokens here.\n   * @param {string} [defaultValue]\n   *        Defaults to `string`. Can be a default value to use for token replacement\n   *        if the lookup key is needed to be separate.\n   *\n   * @return {string}\n   *         The localized string or if no localization exists the english string.\n   */\n  ;\n\n  _proto.localize = function localize(string, tokens, defaultValue) {\n    if (defaultValue === void 0) {\n      defaultValue = string;\n    }\n\n    var code = this.player_.language && this.player_.language();\n    var languages = this.player_.languages && this.player_.languages();\n    var language = languages && languages[code];\n    var primaryCode = code && code.split('-')[0];\n    var primaryLang = languages && languages[primaryCode];\n    var localizedString = defaultValue;\n\n    if (language && language[string]) {\n      localizedString = language[string];\n    } else if (primaryLang && primaryLang[string]) {\n      localizedString = primaryLang[string];\n    }\n\n    if (tokens) {\n      localizedString = localizedString.replace(/\\{(\\d+)\\}/g, function (match, index) {\n        var value = tokens[index - 1];\n        var ret = value;\n\n        if (typeof value === 'undefined') {\n          ret = match;\n        }\n\n        return ret;\n      });\n    }\n\n    return localizedString;\n  }\n  /**\n   * Handles language change for the player in components. Should be overriden by sub-components.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.handleLanguagechange = function handleLanguagechange() {}\n  /**\n   * Return the `Component`s DOM element. This is where children get inserted.\n   * This will usually be the the same as the element returned in {@link Component#el}.\n   *\n   * @return {Element}\n   *         The content element for this `Component`.\n   */\n  ;\n\n  _proto.contentEl = function contentEl() {\n    return this.contentEl_ || this.el_;\n  }\n  /**\n   * Get this `Component`s ID\n   *\n   * @return {string}\n   *         The id of this `Component`\n   */\n  ;\n\n  _proto.id = function id() {\n    return this.id_;\n  }\n  /**\n   * Get the `Component`s name. The name gets used to reference the `Component`\n   * and is set during registration.\n   *\n   * @return {string}\n   *         The name of this `Component`.\n   */\n  ;\n\n  _proto.name = function name() {\n    return this.name_;\n  }\n  /**\n   * Get an array of all child components\n   *\n   * @return {Array}\n   *         The children\n   */\n  ;\n\n  _proto.children = function children() {\n    return this.children_;\n  }\n  /**\n   * Returns the child `Component` with the given `id`.\n   *\n   * @param {string} id\n   *        The id of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `id` or undefined.\n   */\n  ;\n\n  _proto.getChildById = function getChildById(id) {\n    return this.childIndex_[id];\n  }\n  /**\n   * Returns the child `Component` with the given `name`.\n   *\n   * @param {string} name\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The child `Component` with the given `name` or undefined.\n   */\n  ;\n\n  _proto.getChild = function getChild(name) {\n    if (!name) {\n      return;\n    }\n\n    return this.childNameIndex_[name];\n  }\n  /**\n   * Returns the descendant `Component` following the givent\n   * descendant `names`. For instance ['foo', 'bar', 'baz'] would\n   * try to get 'foo' on the current component, 'bar' on the 'foo'\n   * component and 'baz' on the 'bar' component and return undefined\n   * if any of those don't exist.\n   *\n   * @param {...string[]|...string} names\n   *        The name of the child `Component` to get.\n   *\n   * @return {Component|undefined}\n   *         The descendant `Component` following the given descendant\n   *         `names` or undefined.\n   */\n  ;\n\n  _proto.getDescendant = function getDescendant() {\n    for (var _len = arguments.length, names = new Array(_len), _key = 0; _key < _len; _key++) {\n      names[_key] = arguments[_key];\n    }\n\n    // flatten array argument into the main array\n    names = names.reduce(function (acc, n) {\n      return acc.concat(n);\n    }, []);\n    var currentChild = this;\n\n    for (var i = 0; i < names.length; i++) {\n      currentChild = currentChild.getChild(names[i]);\n\n      if (!currentChild || !currentChild.getChild) {\n        return;\n      }\n    }\n\n    return currentChild;\n  }\n  /**\n   * Add a child `Component` inside the current `Component`.\n   *\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @param {number} [index=this.children_.length]\n   *        The index to attempt to add a child into.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options, index) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (index === void 0) {\n      index = this.children_.length;\n    }\n\n    var component;\n    var componentName; // If child is a string, create component with options\n\n    if (typeof child === 'string') {\n      componentName = toTitleCase$1(child);\n      var componentClassName = options.componentClass || componentName; // Set name through options\n\n      options.name = componentName; // Create a new object & element for this controls set\n      // If there's no .player_, this is a player\n\n      var ComponentClass = Component.getComponent(componentClassName);\n\n      if (!ComponentClass) {\n        throw new Error(\"Component \" + componentClassName + \" does not exist\");\n      } // data stored directly on the videojs object may be\n      // misidentified as a component to retain\n      // backwards-compatibility with 4.x. check to make sure the\n      // component class can be instantiated.\n\n\n      if (typeof ComponentClass !== 'function') {\n        return null;\n      }\n\n      component = new ComponentClass(this.player_ || this, options); // child is a component instance\n    } else {\n      component = child;\n    }\n\n    if (component.parentComponent_) {\n      component.parentComponent_.removeChild(component);\n    }\n\n    this.children_.splice(index, 0, component);\n    component.parentComponent_ = this;\n\n    if (typeof component.id === 'function') {\n      this.childIndex_[component.id()] = component;\n    } // If a name wasn't used to create the component, check if we can use the\n    // name function of the component\n\n\n    componentName = componentName || component.name && toTitleCase$1(component.name());\n\n    if (componentName) {\n      this.childNameIndex_[componentName] = component;\n      this.childNameIndex_[toLowerCase(componentName)] = component;\n    } // Add the UI object's element to the container div (box)\n    // Having an element is not required\n\n\n    if (typeof component.el === 'function' && component.el()) {\n      // If inserting before a component, insert before that component's element\n      var refNode = null;\n\n      if (this.children_[index + 1]) {\n        // Most children are components, but the video tech is an HTML element\n        if (this.children_[index + 1].el_) {\n          refNode = this.children_[index + 1].el_;\n        } else if (isEl(this.children_[index + 1])) {\n          refNode = this.children_[index + 1];\n        }\n      }\n\n      this.contentEl().insertBefore(component.el(), refNode);\n    } // Return so it can stored on parent object if desired.\n\n\n    return component;\n  }\n  /**\n   * Remove a child `Component` from this `Component`s list of children. Also removes\n   * the child `Component`s element from this `Component`s element.\n   *\n   * @param {Component} component\n   *        The child `Component` to remove.\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    if (!component || !this.children_) {\n      return;\n    }\n\n    var childFound = false;\n\n    for (var i = this.children_.length - 1; i >= 0; i--) {\n      if (this.children_[i] === component) {\n        childFound = true;\n        this.children_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!childFound) {\n      return;\n    }\n\n    component.parentComponent_ = null;\n    this.childIndex_[component.id()] = null;\n    this.childNameIndex_[toTitleCase$1(component.name())] = null;\n    this.childNameIndex_[toLowerCase(component.name())] = null;\n    var compEl = component.el();\n\n    if (compEl && compEl.parentNode === this.contentEl()) {\n      this.contentEl().removeChild(component.el());\n    }\n  }\n  /**\n   * Add and initialize default child `Component`s based upon options.\n   */\n  ;\n\n  _proto.initChildren = function initChildren() {\n    var _this2 = this;\n\n    var children = this.options_.children;\n\n    if (children) {\n      // `this` is `parent`\n      var parentOptions = this.options_;\n\n      var handleAdd = function handleAdd(child) {\n        var name = child.name;\n        var opts = child.opts; // Allow options for children to be set at the parent options\n        // e.g. videojs(id, { controlBar: false });\n        // instead of videojs(id, { children: { controlBar: false });\n\n        if (parentOptions[name] !== undefined) {\n          opts = parentOptions[name];\n        } // Allow for disabling default components\n        // e.g. options['children']['posterImage'] = false\n\n\n        if (opts === false) {\n          return;\n        } // Allow options to be passed as a simple boolean if no configuration\n        // is necessary.\n\n\n        if (opts === true) {\n          opts = {};\n        } // We also want to pass the original player options\n        // to each component as well so they don't need to\n        // reach back into the player for options later.\n\n\n        opts.playerOptions = _this2.options_.playerOptions; // Create and add the child component.\n        // Add a direct reference to the child by name on the parent instance.\n        // If two of the same component are used, different names should be supplied\n        // for each\n\n        var newChild = _this2.addChild(name, opts);\n\n        if (newChild) {\n          _this2[name] = newChild;\n        }\n      }; // Allow for an array of children details to passed in the options\n\n\n      var workingChildren;\n      var Tech = Component.getComponent('Tech');\n\n      if (Array.isArray(children)) {\n        workingChildren = children;\n      } else {\n        workingChildren = Object.keys(children);\n      }\n\n      workingChildren // children that are in this.options_ but also in workingChildren  would\n      // give us extra children we do not want. So, we want to filter them out.\n      .concat(Object.keys(this.options_).filter(function (child) {\n        return !workingChildren.some(function (wchild) {\n          if (typeof wchild === 'string') {\n            return child === wchild;\n          }\n\n          return child === wchild.name;\n        });\n      })).map(function (child) {\n        var name;\n        var opts;\n\n        if (typeof child === 'string') {\n          name = child;\n          opts = children[name] || _this2.options_[name] || {};\n        } else {\n          name = child.name;\n          opts = child;\n        }\n\n        return {\n          name: name,\n          opts: opts\n        };\n      }).filter(function (child) {\n        // we have to make sure that child.name isn't in the techOrder since\n        // techs are registerd as Components but can't aren't compatible\n        // See https://github.com/videojs/video.js/issues/2772\n        var c = Component.getComponent(child.opts.componentClass || toTitleCase$1(child.name));\n        return c && !Tech.isTech(c);\n      }).forEach(handleAdd);\n    }\n  }\n  /**\n   * Builds the default DOM class name. Should be overriden by sub-components.\n   *\n   * @return {string}\n   *         The DOM class name for this object.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    // Child classes can include a function that does:\n    // return 'CLASS NAME' + this._super();\n    return '';\n  }\n  /**\n   * Bind a listener to the component's ready state.\n   * Different from event listeners in that if the ready event has already happened\n   * it will trigger the function immediately.\n   *\n   * @return {Component}\n   *         Returns itself; method can be chained.\n   */\n  ;\n\n  _proto.ready = function ready(fn, sync) {\n    if (sync === void 0) {\n      sync = false;\n    }\n\n    if (!fn) {\n      return;\n    }\n\n    if (!this.isReady_) {\n      this.readyQueue_ = this.readyQueue_ || [];\n      this.readyQueue_.push(fn);\n      return;\n    }\n\n    if (sync) {\n      fn.call(this);\n    } else {\n      // Call the function asynchronously by default for consistency\n      this.setTimeout(fn, 1);\n    }\n  }\n  /**\n   * Trigger all the ready listeners for this `Component`.\n   *\n   * @fires Component#ready\n   */\n  ;\n\n  _proto.triggerReady = function triggerReady() {\n    this.isReady_ = true; // Ensure ready is triggered asynchronously\n\n    this.setTimeout(function () {\n      var readyQueue = this.readyQueue_; // Reset Ready Queue\n\n      this.readyQueue_ = [];\n\n      if (readyQueue && readyQueue.length > 0) {\n        readyQueue.forEach(function (fn) {\n          fn.call(this);\n        }, this);\n      } // Allow for using event listeners also\n\n      /**\n       * Triggered when a `Component` is ready.\n       *\n       * @event Component#ready\n       * @type {EventTarget~Event}\n       */\n\n\n      this.trigger('ready');\n    }, 1);\n  }\n  /**\n   * Find a single DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelector`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {Element|null}\n   *         the dom element that was found, or null\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$ = function $$1(selector, context) {\n    return $(selector, context || this.contentEl());\n  }\n  /**\n   * Finds all DOM element matching a `selector`. This can be within the `Component`s\n   * `contentEl()` or another custom context.\n   *\n   * @param {string} selector\n   *        A valid CSS selector, which will be passed to `querySelectorAll`.\n   *\n   * @param {Element|string} [context=this.contentEl()]\n   *        A DOM element within which to query. Can also be a selector string in\n   *        which case the first matching element will get used as context. If\n   *        missing `this.contentEl()` gets used. If  `this.contentEl()` returns\n   *        nothing it falls back to `document`.\n   *\n   * @return {NodeList}\n   *         a list of dom elements that were found\n   *\n   * @see [Information on CSS Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_Started/Selectors)\n   */\n  ;\n\n  _proto.$$ = function $$$1(selector, context) {\n    return $$(selector, context || this.contentEl());\n  }\n  /**\n   * Check if a component's element has a CSS class name.\n   *\n   * @param {string} classToCheck\n   *        CSS class name to check.\n   *\n   * @return {boolean}\n   *         - True if the `Component` has the class.\n   *         - False if the `Component` does not have the class`\n   */\n  ;\n\n  _proto.hasClass = function hasClass$1(classToCheck) {\n    return hasClass(this.el_, classToCheck);\n  }\n  /**\n   * Add a CSS class name to the `Component`s element.\n   *\n   * @param {string} classToAdd\n   *        CSS class name to add\n   */\n  ;\n\n  _proto.addClass = function addClass$1(classToAdd) {\n    addClass(this.el_, classToAdd);\n  }\n  /**\n   * Remove a CSS class name from the `Component`s element.\n   *\n   * @param {string} classToRemove\n   *        CSS class name to remove\n   */\n  ;\n\n  _proto.removeClass = function removeClass$1(classToRemove) {\n    removeClass(this.el_, classToRemove);\n  }\n  /**\n   * Add or remove a CSS class name from the component's element.\n   * - `classToToggle` gets added when {@link Component#hasClass} would return false.\n   * - `classToToggle` gets removed when {@link Component#hasClass} would return true.\n   *\n   * @param  {string} classToToggle\n   *         The class to add or remove based on (@link Component#hasClass}\n   *\n   * @param  {boolean|Dom~predicate} [predicate]\n   *         An {@link Dom~predicate} function or a boolean\n   */\n  ;\n\n  _proto.toggleClass = function toggleClass$1(classToToggle, predicate) {\n    toggleClass(this.el_, classToToggle, predicate);\n  }\n  /**\n   * Show the `Component`s element if it is hidden by removing the\n   * 'vjs-hidden' class name from it.\n   */\n  ;\n\n  _proto.show = function show() {\n    this.removeClass('vjs-hidden');\n  }\n  /**\n   * Hide the `Component`s element if it is currently showing by adding the\n   * 'vjs-hidden` class name to it.\n   */\n  ;\n\n  _proto.hide = function hide() {\n    this.addClass('vjs-hidden');\n  }\n  /**\n   * Lock a `Component`s element in its visible state by adding the 'vjs-lock-showing'\n   * class name to it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.lockShowing = function lockShowing() {\n    this.addClass('vjs-lock-showing');\n  }\n  /**\n   * Unlock a `Component`s element from its visible state by removing the 'vjs-lock-showing'\n   * class name from it. Used during fadeIn/fadeOut.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unlockShowing = function unlockShowing() {\n    this.removeClass('vjs-lock-showing');\n  }\n  /**\n   * Get the value of an attribute on the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to get the value from.\n   *\n   * @return {string|null}\n   *         - The value of the attribute that was asked for.\n   *         - Can be an empty string on some browsers if the attribute does not exist\n   *           or has no value\n   *         - Most browsers will return null if the attibute does not exist or has\n   *           no value.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttribute}\n   */\n  ;\n\n  _proto.getAttribute = function getAttribute$1(attribute) {\n    return getAttribute(this.el_, attribute);\n  }\n  /**\n   * Set the value of an attribute on the `Component`'s element\n   *\n   * @param {string} attribute\n   *        Name of the attribute to set.\n   *\n   * @param {string} value\n   *        Value to set the attribute to.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/setAttribute}\n   */\n  ;\n\n  _proto.setAttribute = function setAttribute$1(attribute, value) {\n    setAttribute(this.el_, attribute, value);\n  }\n  /**\n   * Remove an attribute from the `Component`s element.\n   *\n   * @param {string} attribute\n   *        Name of the attribute to remove.\n   *\n   * @see [DOM API]{@link https://developer.mozilla.org/en-US/docs/Web/API/Element/removeAttribute}\n   */\n  ;\n\n  _proto.removeAttribute = function removeAttribute$1(attribute) {\n    removeAttribute(this.el_, attribute);\n  }\n  /**\n   * Get or set the width of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The width that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *           postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.width = function width(num, skipListeners) {\n    return this.dimension('width', num, skipListeners);\n  }\n  /**\n   * Get or set the height of the component based upon the CSS styles.\n   * See {@link Component#dimension} for more detailed information.\n   *\n   * @param {number|string} [num]\n   *        The height that you want to set postfixed with '%', 'px' or nothing.\n   *\n   * @param {boolean} [skipListeners]\n   *        Skip the componentresize event trigger\n   *\n   * @return {number|string}\n   *         The width when getting, zero if there is no width. Can be a string\n   *         postpixed with '%' or 'px'.\n   */\n  ;\n\n  _proto.height = function height(num, skipListeners) {\n    return this.dimension('height', num, skipListeners);\n  }\n  /**\n   * Set both the width and height of the `Component` element at the same time.\n   *\n   * @param  {number|string} width\n   *         Width to set the `Component`s element to.\n   *\n   * @param  {number|string} height\n   *         Height to set the `Component`s element to.\n   */\n  ;\n\n  _proto.dimensions = function dimensions(width, height) {\n    // Skip componentresize listeners on width for optimization\n    this.width(width, true);\n    this.height(height);\n  }\n  /**\n   * Get or set width or height of the `Component` element. This is the shared code\n   * for the {@link Component#width} and {@link Component#height}.\n   *\n   * Things to know:\n   * - If the width or height in an number this will return the number postfixed with 'px'.\n   * - If the width/height is a percent this will return the percent postfixed with '%'\n   * - Hidden elements have a width of 0 with `window.getComputedStyle`. This function\n   *   defaults to the `Component`s `style.width` and falls back to `window.getComputedStyle`.\n   *   See [this]{@link http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/}\n   *   for more information\n   * - If you want the computed style of the component, use {@link Component#currentWidth}\n   *   and {@link {Component#currentHeight}\n   *\n   * @fires Component#componentresize\n   *\n   * @param {string} widthOrHeight\n   8        'width' or 'height'\n   *\n   * @param  {number|string} [num]\n   8         New dimension\n   *\n   * @param  {boolean} [skipListeners]\n   *         Skip componentresize event trigger\n   *\n   * @return {number}\n   *         The dimension when getting or 0 if unset\n   */\n  ;\n\n  _proto.dimension = function dimension(widthOrHeight, num, skipListeners) {\n    if (num !== undefined) {\n      // Set to zero if null or literally NaN (NaN !== NaN)\n      if (num === null || num !== num) {\n        num = 0;\n      } // Check if using css width/height (% or px) and adjust\n\n\n      if (('' + num).indexOf('%') !== -1 || ('' + num).indexOf('px') !== -1) {\n        this.el_.style[widthOrHeight] = num;\n      } else if (num === 'auto') {\n        this.el_.style[widthOrHeight] = '';\n      } else {\n        this.el_.style[widthOrHeight] = num + 'px';\n      } // skipListeners allows us to avoid triggering the resize event when setting both width and height\n\n\n      if (!skipListeners) {\n        /**\n         * Triggered when a component is resized.\n         *\n         * @event Component#componentresize\n         * @type {EventTarget~Event}\n         */\n        this.trigger('componentresize');\n      }\n\n      return;\n    } // Not setting a value, so getting it\n    // Make sure element exists\n\n\n    if (!this.el_) {\n      return 0;\n    } // Get dimension value from style\n\n\n    var val = this.el_.style[widthOrHeight];\n    var pxIndex = val.indexOf('px');\n\n    if (pxIndex !== -1) {\n      // Return the pixel value with no 'px'\n      return parseInt(val.slice(0, pxIndex), 10);\n    } // No px so using % or no style was set, so falling back to offsetWidth/height\n    // If component has display:none, offset will return 0\n    // TODO: handle display:none and no dimension style using px\n\n\n    return parseInt(this.el_['offset' + toTitleCase$1(widthOrHeight)], 10);\n  }\n  /**\n   * Get the computed width or the height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @param {string} widthOrHeight\n   *        A string containing 'width' or 'height'. Whichever one you want to get.\n   *\n   * @return {number}\n   *         The dimension that gets asked for or 0 if nothing was set\n   *         for that dimension.\n   */\n  ;\n\n  _proto.currentDimension = function currentDimension(widthOrHeight) {\n    var computedWidthOrHeight = 0;\n\n    if (widthOrHeight !== 'width' && widthOrHeight !== 'height') {\n      throw new Error('currentDimension only accepts width or height value');\n    }\n\n    computedWidthOrHeight = computedStyle(this.el_, widthOrHeight); // remove 'px' from variable and parse as integer\n\n    computedWidthOrHeight = parseFloat(computedWidthOrHeight); // if the computed value is still 0, it's possible that the browser is lying\n    // and we want to check the offset values.\n    // This code also runs wherever getComputedStyle doesn't exist.\n\n    if (computedWidthOrHeight === 0 || isNaN(computedWidthOrHeight)) {\n      var rule = \"offset\" + toTitleCase$1(widthOrHeight);\n      computedWidthOrHeight = this.el_[rule];\n    }\n\n    return computedWidthOrHeight;\n  }\n  /**\n   * An object that contains width and height values of the `Component`s\n   * computed style. Uses `window.getComputedStyle`.\n   *\n   * @typedef {Object} Component~DimensionObject\n   *\n   * @property {number} width\n   *           The width of the `Component`s computed style.\n   *\n   * @property {number} height\n   *           The height of the `Component`s computed style.\n   */\n\n  /**\n   * Get an object that contains computed width and height values of the\n   * component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {Component~DimensionObject}\n   *         The computed dimensions of the component's element.\n   */\n  ;\n\n  _proto.currentDimensions = function currentDimensions() {\n    return {\n      width: this.currentDimension('width'),\n      height: this.currentDimension('height')\n    };\n  }\n  /**\n   * Get the computed width of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed width of the component's element.\n   */\n  ;\n\n  _proto.currentWidth = function currentWidth() {\n    return this.currentDimension('width');\n  }\n  /**\n   * Get the computed height of the component's element.\n   *\n   * Uses `window.getComputedStyle`.\n   *\n   * @return {number}\n   *         The computed height of the component's element.\n   */\n  ;\n\n  _proto.currentHeight = function currentHeight() {\n    return this.currentDimension('height');\n  }\n  /**\n   * Set the focus to this component\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.el_.focus();\n  }\n  /**\n   * Remove the focus from this component\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.el_.blur();\n  }\n  /**\n   * When this Component receives a `keydown` event which it does not process,\n   *  it passes the event to the Player for handling.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (this.player_) {\n      // We only stop propagation here because we want unhandled events to fall\n      // back to the browser. Exclude Tab for focus trapping.\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.stopPropagation();\n      }\n\n      this.player_.handleKeyDown(event);\n    }\n  }\n  /**\n   * Many components used to have a `handleKeyPress` method, which was poorly\n   * named because it listened to a `keydown` event. This method name now\n   * delegates to `handleKeyDown`. This means anyone calling `handleKeyPress`\n   * will not see their method calls stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    this.handleKeyDown(event);\n  }\n  /**\n   * Emit a 'tap' events when touch event support gets detected. This gets used to\n   * support toggling the controls through a tap on the video. They get enabled\n   * because every sub-component would have extra overhead otherwise.\n   *\n   * @private\n   * @fires Component#tap\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchleave\n   * @listens Component#touchcancel\n   * @listens Component#touchend\n    */\n  ;\n\n  _proto.emitTapEvents = function emitTapEvents() {\n    // Track the start time so we can determine how long the touch lasted\n    var touchStart = 0;\n    var firstTouch = null; // Maximum movement allowed during a touch event to still be considered a tap\n    // Other popular libs use anywhere from 2 (hammer.js) to 15,\n    // so 10 seems like a nice, round number.\n\n    var tapMovementThreshold = 10; // The maximum length a touch can be while still being considered a tap\n\n    var touchTimeThreshold = 200;\n    var couldBeTap;\n    this.on('touchstart', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length === 1) {\n        // Copy pageX/pageY from the object\n        firstTouch = {\n          pageX: event.touches[0].pageX,\n          pageY: event.touches[0].pageY\n        }; // Record start time so we can detect a tap vs. \"touch and hold\"\n\n        touchStart = window$1.performance.now(); // Reset couldBeTap tracking\n\n        couldBeTap = true;\n      }\n    });\n    this.on('touchmove', function (event) {\n      // If more than one finger, don't consider treating this as a click\n      if (event.touches.length > 1) {\n        couldBeTap = false;\n      } else if (firstTouch) {\n        // Some devices will throw touchmoves for all but the slightest of taps.\n        // So, if we moved only a small distance, this could still be a tap\n        var xdiff = event.touches[0].pageX - firstTouch.pageX;\n        var ydiff = event.touches[0].pageY - firstTouch.pageY;\n        var touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);\n\n        if (touchDistance > tapMovementThreshold) {\n          couldBeTap = false;\n        }\n      }\n    });\n\n    var noTap = function noTap() {\n      couldBeTap = false;\n    }; // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s\n\n\n    this.on('touchleave', noTap);\n    this.on('touchcancel', noTap); // When the touch ends, measure how long it took and trigger the appropriate\n    // event\n\n    this.on('touchend', function (event) {\n      firstTouch = null; // Proceed only if the touchmove/leave/cancel event didn't happen\n\n      if (couldBeTap === true) {\n        // Measure how long the touch lasted\n        var touchTime = window$1.performance.now() - touchStart; // Make sure the touch was less than the threshold to be considered a tap\n\n        if (touchTime < touchTimeThreshold) {\n          // Don't let browser turn this into a click\n          event.preventDefault();\n          /**\n           * Triggered when a `Component` is tapped.\n           *\n           * @event Component#tap\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('tap'); // It may be good to copy the touchend event object and change the\n          // type to tap, if the other event properties aren't exact after\n          // Events.fixEvent runs (e.g. event.target)\n        }\n      }\n    });\n  }\n  /**\n   * This function reports user activity whenever touch events happen. This can get\n   * turned off by any sub-components that wants touch events to act another way.\n   *\n   * Report user touch activity when touch events occur. User activity gets used to\n   * determine when controls should show/hide. It is simple when it comes to mouse\n   * events, because any mouse event should show the controls. So we capture mouse\n   * events that bubble up to the player and report activity when that happens.\n   * With touch events it isn't as easy as `touchstart` and `touchend` toggle player\n   * controls. So touch events can't help us at the player level either.\n   *\n   * User activity gets checked asynchronously. So what could happen is a tap event\n   * on the video turns the controls off. Then the `touchend` event bubbles up to\n   * the player. Which, if it reported user activity, would turn the controls right\n   * back on. We also don't want to completely block touch events from bubbling up.\n   * Furthermore a `touchmove` event and anything other than a tap, should not turn\n   * controls back on.\n   *\n   * @listens Component#touchstart\n   * @listens Component#touchmove\n   * @listens Component#touchend\n   * @listens Component#touchcancel\n   */\n  ;\n\n  _proto.enableTouchActivity = function enableTouchActivity() {\n    // Don't continue if the root player doesn't support reporting user activity\n    if (!this.player() || !this.player().reportUserActivity) {\n      return;\n    } // listener for reporting that the user is active\n\n\n    var report = bind(this.player(), this.player().reportUserActivity);\n    var touchHolding;\n    this.on('touchstart', function () {\n      report(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(touchHolding); // report at the same interval as activityCheck\n\n      touchHolding = this.setInterval(report, 250);\n    });\n\n    var touchEnd = function touchEnd(event) {\n      report(); // stop the interval that maintains activity if the touch is holding\n\n      this.clearInterval(touchHolding);\n    };\n\n    this.on('touchmove', report);\n    this.on('touchend', touchEnd);\n    this.on('touchcancel', touchEnd);\n  }\n  /**\n   * A callback that has no parameters and is bound into `Component`s context.\n   *\n   * @callback Component~GenericCallback\n   * @this Component\n   */\n\n  /**\n   * Creates a function that runs after an `x` millisecond timeout. This function is a\n   * wrapper around `window.setTimeout`. There are a few reasons to use this one\n   * instead though:\n   * 1. It gets cleared via  {@link Component#clearTimeout} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will gets turned into a {@link Component~GenericCallback}\n   *\n   * > Note: You can't use `window.clearTimeout` on the id returned by this function. This\n   *         will cause its dispose listener not to get cleaned up! Please use\n   *         {@link Component#clearTimeout} or {@link Component#dispose} instead.\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function that will be run after `timeout`.\n   *\n   * @param {number} timeout\n   *        Timeout in milliseconds to delay before executing the specified function.\n   *\n   * @return {number}\n   *         Returns a timeout ID that gets used to identify the timeout. It can also\n   *         get used in {@link Component#clearTimeout} to clear the timeout that\n   *         was set.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout}\n   */\n  ;\n\n  _proto.setTimeout = function setTimeout(fn, timeout) {\n    var _this3 = this;\n\n    // declare as variables so they are properly available in timeout function\n    // eslint-disable-next-line\n    var timeoutId;\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    timeoutId = window$1.setTimeout(function () {\n      if (_this3.setTimeoutIds_.has(timeoutId)) {\n        _this3.setTimeoutIds_[\"delete\"](timeoutId);\n      }\n\n      fn();\n    }, timeout);\n    this.setTimeoutIds_.add(timeoutId);\n    return timeoutId;\n  }\n  /**\n   * Clears a timeout that gets created via `window.setTimeout` or\n   * {@link Component#setTimeout}. If you set a timeout via {@link Component#setTimeout}\n   * use this function instead of `window.clearTimout`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} timeoutId\n   *        The id of the timeout to clear. The return value of\n   *        {@link Component#setTimeout} or `window.setTimeout`.\n   *\n   * @return {number}\n   *         Returns the timeout id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearTimeout}\n   */\n  ;\n\n  _proto.clearTimeout = function clearTimeout(timeoutId) {\n    if (this.setTimeoutIds_.has(timeoutId)) {\n      this.setTimeoutIds_[\"delete\"](timeoutId);\n      window$1.clearTimeout(timeoutId);\n    }\n\n    return timeoutId;\n  }\n  /**\n   * Creates a function that gets run every `x` milliseconds. This function is a wrapper\n   * around `window.setInterval`. There are a few reasons to use this one instead though.\n   * 1. It gets cleared via  {@link Component#clearInterval} when\n   *    {@link Component#dispose} gets called.\n   * 2. The function callback will be a {@link Component~GenericCallback}\n   *\n   * @param {Component~GenericCallback} fn\n   *        The function to run every `x` seconds.\n   *\n   * @param {number} interval\n   *        Execute the specified function every `x` milliseconds.\n   *\n   * @return {number}\n   *         Returns an id that can be used to identify the interval. It can also be be used in\n   *         {@link Component#clearInterval} to clear the interval.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setInterval}\n   */\n  ;\n\n  _proto.setInterval = function setInterval(fn, interval) {\n    fn = bind(this, fn);\n    this.clearTimersOnDispose_();\n    var intervalId = window$1.setInterval(fn, interval);\n    this.setIntervalIds_.add(intervalId);\n    return intervalId;\n  }\n  /**\n   * Clears an interval that gets created via `window.setInterval` or\n   * {@link Component#setInterval}. If you set an inteval via {@link Component#setInterval}\n   * use this function instead of `window.clearInterval`. If you don't your dispose\n   * listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} intervalId\n   *        The id of the interval to clear. The return value of\n   *        {@link Component#setInterval} or `window.setInterval`.\n   *\n   * @return {number}\n   *         Returns the interval id that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/clearInterval}\n   */\n  ;\n\n  _proto.clearInterval = function clearInterval(intervalId) {\n    if (this.setIntervalIds_.has(intervalId)) {\n      this.setIntervalIds_[\"delete\"](intervalId);\n      window$1.clearInterval(intervalId);\n    }\n\n    return intervalId;\n  }\n  /**\n   * Queues up a callback to be passed to requestAnimationFrame (rAF), but\n   * with a few extra bonuses:\n   *\n   * - Supports browsers that do not support rAF by falling back to\n   *   {@link Component#setTimeout}.\n   *\n   * - The callback is turned into a {@link Component~GenericCallback} (i.e.\n   *   bound to the component).\n   *\n   * - Automatic cancellation of the rAF callback is handled if the component\n   *   is disposed before it is called.\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   *\n   * @return {number}\n   *         Returns an rAF ID that gets used to identify the timeout. It can\n   *         also be used in {@link Component#cancelAnimationFrame} to cancel\n   *         the animation frame callback.\n   *\n   * @listens Component#dispose\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/requestAnimationFrame}\n   */\n  ;\n\n  _proto.requestAnimationFrame = function requestAnimationFrame(fn) {\n    var _this4 = this;\n\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.setTimeout(fn, 1000 / 60);\n    }\n\n    this.clearTimersOnDispose_(); // declare as variables so they are properly available in rAF function\n    // eslint-disable-next-line\n\n    var id;\n    fn = bind(this, fn);\n    id = window$1.requestAnimationFrame(function () {\n      if (_this4.rafIds_.has(id)) {\n        _this4.rafIds_[\"delete\"](id);\n      }\n\n      fn();\n    });\n    this.rafIds_.add(id);\n    return id;\n  }\n  /**\n   * Request an animation frame, but only one named animation\n   * frame will be queued. Another will never be added until\n   * the previous one finishes.\n   *\n   * @param {string} name\n   *        The name to give this requestAnimationFrame\n   *\n   * @param  {Component~GenericCallback} fn\n   *         A function that will be bound to this component and executed just\n   *         before the browser's next repaint.\n   */\n  ;\n\n  _proto.requestNamedAnimationFrame = function requestNamedAnimationFrame(name, fn) {\n    var _this5 = this;\n\n    if (this.namedRafs_.has(name)) {\n      return;\n    }\n\n    this.clearTimersOnDispose_();\n    fn = bind(this, fn);\n    var id = this.requestAnimationFrame(function () {\n      fn();\n\n      if (_this5.namedRafs_.has(name)) {\n        _this5.namedRafs_[\"delete\"](name);\n      }\n    });\n    this.namedRafs_.set(name, id);\n    return name;\n  }\n  /**\n   * Cancels a current named animation frame if it exists.\n   *\n   * @param {string} name\n   *        The name of the requestAnimationFrame to cancel.\n   */\n  ;\n\n  _proto.cancelNamedAnimationFrame = function cancelNamedAnimationFrame(name) {\n    if (!this.namedRafs_.has(name)) {\n      return;\n    }\n\n    this.cancelAnimationFrame(this.namedRafs_.get(name));\n    this.namedRafs_[\"delete\"](name);\n  }\n  /**\n   * Cancels a queued callback passed to {@link Component#requestAnimationFrame}\n   * (rAF).\n   *\n   * If you queue an rAF callback via {@link Component#requestAnimationFrame},\n   * use this function instead of `window.cancelAnimationFrame`. If you don't,\n   * your dispose listener will not get cleaned up until {@link Component#dispose}!\n   *\n   * @param {number} id\n   *        The rAF ID to clear. The return value of {@link Component#requestAnimationFrame}.\n   *\n   * @return {number}\n   *         Returns the rAF ID that was cleared.\n   *\n   * @see [Similar to]{@link https://developer.mozilla.org/en-US/docs/Web/API/window/cancelAnimationFrame}\n   */\n  ;\n\n  _proto.cancelAnimationFrame = function cancelAnimationFrame(id) {\n    // Fall back to using a timer.\n    if (!this.supportsRaf_) {\n      return this.clearTimeout(id);\n    }\n\n    if (this.rafIds_.has(id)) {\n      this.rafIds_[\"delete\"](id);\n      window$1.cancelAnimationFrame(id);\n    }\n\n    return id;\n  }\n  /**\n   * A function to setup `requestAnimationFrame`, `setTimeout`,\n   * and `setInterval`, clearing on dispose.\n   *\n   * > Previously each timer added and removed dispose listeners on it's own.\n   * For better performance it was decided to batch them all, and use `Set`s\n   * to track outstanding timer ids.\n   *\n   * @private\n   */\n  ;\n\n  _proto.clearTimersOnDispose_ = function clearTimersOnDispose_() {\n    var _this6 = this;\n\n    if (this.clearingTimersOnDispose_) {\n      return;\n    }\n\n    this.clearingTimersOnDispose_ = true;\n    this.one('dispose', function () {\n      [['namedRafs_', 'cancelNamedAnimationFrame'], ['rafIds_', 'cancelAnimationFrame'], ['setTimeoutIds_', 'clearTimeout'], ['setIntervalIds_', 'clearInterval']].forEach(function (_ref) {\n        var idName = _ref[0],\n            cancelName = _ref[1];\n\n        // for a `Set` key will actually be the value again\n        // so forEach((val, val) =>` but for maps we want to use\n        // the key.\n        _this6[idName].forEach(function (val, key) {\n          return _this6[cancelName](key);\n        });\n      });\n      _this6.clearingTimersOnDispose_ = false;\n    });\n  }\n  /**\n   * Register a `Component` with `videojs` given the name and the component.\n   *\n   * > NOTE: {@link Tech}s should not be registered as a `Component`. {@link Tech}s\n   *         should be registered using {@link Tech.registerTech} or\n   *         {@link videojs:videojs.registerTech}.\n   *\n   * > NOTE: This function can also be seen on videojs as\n   *         {@link videojs:videojs.registerComponent}.\n   *\n   * @param {string} name\n   *        The name of the `Component` to register.\n   *\n   * @param {Component} ComponentToRegister\n   *        The `Component` class to register.\n   *\n   * @return {Component}\n   *         The `Component` that was registered.\n   */\n  ;\n\n  Component.registerComponent = function registerComponent(name, ComponentToRegister) {\n    if (typeof name !== 'string' || !name) {\n      throw new Error(\"Illegal component name, \\\"\" + name + \"\\\"; must be a non-empty string.\");\n    }\n\n    var Tech = Component.getComponent('Tech'); // We need to make sure this check is only done if Tech has been registered.\n\n    var isTech = Tech && Tech.isTech(ComponentToRegister);\n    var isComp = Component === ComponentToRegister || Component.prototype.isPrototypeOf(ComponentToRegister.prototype);\n\n    if (isTech || !isComp) {\n      var reason;\n\n      if (isTech) {\n        reason = 'techs must be registered using Tech.registerTech()';\n      } else {\n        reason = 'must be a Component subclass';\n      }\n\n      throw new Error(\"Illegal component, \\\"\" + name + \"\\\"; \" + reason + \".\");\n    }\n\n    name = toTitleCase$1(name);\n\n    if (!Component.components_) {\n      Component.components_ = {};\n    }\n\n    var Player = Component.getComponent('Player');\n\n    if (name === 'Player' && Player && Player.players) {\n      var players = Player.players;\n      var playerNames = Object.keys(players); // If we have players that were disposed, then their name will still be\n      // in Players.players. So, we must loop through and verify that the value\n      // for each item is not null. This allows registration of the Player component\n      // after all players have been disposed or before any were created.\n\n      if (players && playerNames.length > 0 && playerNames.map(function (pname) {\n        return players[pname];\n      }).every(Boolean)) {\n        throw new Error('Can not register Player component after player has been created.');\n      }\n    }\n\n    Component.components_[name] = ComponentToRegister;\n    Component.components_[toLowerCase(name)] = ComponentToRegister;\n    return ComponentToRegister;\n  }\n  /**\n   * Get a `Component` based on the name it was registered with.\n   *\n   * @param {string} name\n   *        The Name of the component to get.\n   *\n   * @return {Component}\n   *         The `Component` that got registered under the given name.\n   */\n  ;\n\n  Component.getComponent = function getComponent(name) {\n    if (!name || !Component.components_) {\n      return;\n    }\n\n    return Component.components_[name];\n  };\n\n  return Component;\n}();\n/**\n * Whether or not this component supports `requestAnimationFrame`.\n *\n * This is exposed primarily for testing purposes.\n *\n * @private\n * @type {Boolean}\n */\n\n\nComponent$1.prototype.supportsRaf_ = typeof window$1.requestAnimationFrame === 'function' && typeof window$1.cancelAnimationFrame === 'function';\nComponent$1.registerComponent('Component', Component$1);\n\n/**\n * @file time-ranges.js\n * @module time-ranges\n */\n/**\n * Returns the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @typedef    {Function} TimeRangeIndex\n *\n * @param      {number} [index=0]\n *             The range number to return the time for.\n *\n * @return     {number}\n *             The time offset at the specified index.\n *\n * @deprecated The index argument must be provided.\n *             In the future, leaving it out will throw an error.\n */\n\n/**\n * An object that contains ranges of time.\n *\n * @typedef  {Object} TimeRange\n *\n * @property {number} length\n *           The number of time ranges represented by this object.\n *\n * @property {module:time-ranges~TimeRangeIndex} start\n *           Returns the time offset at which a specified time range begins.\n *\n * @property {module:time-ranges~TimeRangeIndex} end\n *           Returns the time offset at which a specified time range ends.\n *\n * @see https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges\n */\n\n/**\n * Check if any of the time ranges are over the maximum index.\n *\n * @private\n * @param   {string} fnName\n *          The function name to use for logging\n *\n * @param   {number} index\n *          The index to check\n *\n * @param   {number} maxIndex\n *          The maximum possible index\n *\n * @throws  {Error} if the timeRanges provided are over the maxIndex\n */\n\nfunction rangeCheck(fnName, index, maxIndex) {\n  if (typeof index !== 'number' || index < 0 || index > maxIndex) {\n    throw new Error(\"Failed to execute '\" + fnName + \"' on 'TimeRanges': The index provided (\" + index + \") is non-numeric or out of bounds (0-\" + maxIndex + \").\");\n  }\n}\n/**\n * Get the time for the specified index at the start or end\n * of a TimeRange object.\n *\n * @private\n * @param      {string} fnName\n *             The function name to use for logging\n *\n * @param      {string} valueIndex\n *             The property that should be used to get the time. should be\n *             'start' or 'end'\n *\n * @param      {Array} ranges\n *             An array of time ranges\n *\n * @param      {Array} [rangeIndex=0]\n *             The index to start the search at\n *\n * @return     {number}\n *             The time that offset at the specified index.\n *\n * @deprecated rangeIndex must be set to a value, in the future this will throw an error.\n * @throws     {Error} if rangeIndex is more than the length of ranges\n */\n\n\nfunction getRange(fnName, valueIndex, ranges, rangeIndex) {\n  rangeCheck(fnName, rangeIndex, ranges.length - 1);\n  return ranges[rangeIndex][valueIndex];\n}\n/**\n * Create a time range object given ranges of time.\n *\n * @private\n * @param   {Array} [ranges]\n *          An array of time ranges.\n */\n\n\nfunction createTimeRangesObj(ranges) {\n  var timeRangesObj;\n\n  if (ranges === undefined || ranges.length === 0) {\n    timeRangesObj = {\n      length: 0,\n      start: function start() {\n        throw new Error('This TimeRanges object is empty');\n      },\n      end: function end() {\n        throw new Error('This TimeRanges object is empty');\n      }\n    };\n  } else {\n    timeRangesObj = {\n      length: ranges.length,\n      start: getRange.bind(null, 'start', 0, ranges),\n      end: getRange.bind(null, 'end', 1, ranges)\n    };\n  }\n\n  if (window$1.Symbol && window$1.Symbol.iterator) {\n    timeRangesObj[window$1.Symbol.iterator] = function () {\n      return (ranges || []).values();\n    };\n  }\n\n  return timeRangesObj;\n}\n/**\n * Create a `TimeRange` object which mimics an\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/TimeRanges|HTML5 TimeRanges instance}.\n *\n * @param {number|Array[]} start\n *        The start of a single range (a number) or an array of ranges (an\n *        array of arrays of two numbers each).\n *\n * @param {number} end\n *        The end of a single range. Cannot be used with the array form of\n *        the `start` argument.\n */\n\n\nfunction createTimeRanges(start, end) {\n  if (Array.isArray(start)) {\n    return createTimeRangesObj(start);\n  } else if (start === undefined || end === undefined) {\n    return createTimeRangesObj();\n  }\n\n  return createTimeRangesObj([[start, end]]);\n}\n\n/**\n * @file buffer.js\n * @module buffer\n */\n/**\n * Compute the percentage of the media that has been buffered.\n *\n * @param {TimeRange} buffered\n *        The current `TimeRange` object representing buffered time ranges\n *\n * @param {number} duration\n *        Total duration of the media\n *\n * @return {number}\n *         Percent buffered of the total duration in decimal form.\n */\n\nfunction bufferedPercent(buffered, duration) {\n  var bufferedDuration = 0;\n  var start;\n  var end;\n\n  if (!duration) {\n    return 0;\n  }\n\n  if (!buffered || !buffered.length) {\n    buffered = createTimeRanges(0, 0);\n  }\n\n  for (var i = 0; i < buffered.length; i++) {\n    start = buffered.start(i);\n    end = buffered.end(i); // buffered end can be bigger than duration by a very small fraction\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    bufferedDuration += end - start;\n  }\n\n  return bufferedDuration / duration;\n}\n\n/**\n * @file media-error.js\n */\n/**\n * A Custom `MediaError` class which mimics the standard HTML5 `MediaError` class.\n *\n * @param {number|string|Object|MediaError} value\n *        This can be of multiple types:\n *        - number: should be a standard error code\n *        - string: an error message (the code will be 0)\n *        - Object: arbitrary properties\n *        - `MediaError` (native): used to populate a video.js `MediaError` object\n *        - `MediaError` (video.js): will return itself if it's already a\n *          video.js `MediaError` object.\n *\n * @see [MediaError Spec]{@link https://dev.w3.org/html5/spec-author-view/video.html#mediaerror}\n * @see [Encrypted MediaError Spec]{@link https://www.w3.org/TR/2013/WD-encrypted-media-20130510/#error-codes}\n *\n * @class MediaError\n */\n\nfunction MediaError(value) {\n  // Allow redundant calls to this constructor to avoid having `instanceof`\n  // checks peppered around the code.\n  if (value instanceof MediaError) {\n    return value;\n  }\n\n  if (typeof value === 'number') {\n    this.code = value;\n  } else if (typeof value === 'string') {\n    // default code is zero, so this is a custom error\n    this.message = value;\n  } else if (isObject(value)) {\n    // We assign the `code` property manually because native `MediaError` objects\n    // do not expose it as an own/enumerable property of the object.\n    if (typeof value.code === 'number') {\n      this.code = value.code;\n    }\n\n    assign(this, value);\n  }\n\n  if (!this.message) {\n    this.message = MediaError.defaultMessages[this.code] || '';\n  }\n}\n/**\n * The error code that refers two one of the defined `MediaError` types\n *\n * @type {Number}\n */\n\n\nMediaError.prototype.code = 0;\n/**\n * An optional message that to show with the error. Message is not part of the HTML5\n * video spec but allows for more informative custom errors.\n *\n * @type {String}\n */\n\nMediaError.prototype.message = '';\n/**\n * An optional status code that can be set by plugins to allow even more detail about\n * the error. For example a plugin might provide a specific HTTP status code and an\n * error message for that code. Then when the plugin gets that error this class will\n * know how to display an error message for it. This allows a custom message to show\n * up on the `Player` error overlay.\n *\n * @type {Array}\n */\n\nMediaError.prototype.status = null;\n/**\n * Errors indexed by the W3C standard. The order **CANNOT CHANGE**! See the\n * specification listed under {@link MediaError} for more information.\n *\n * @enum {array}\n * @readonly\n * @property {string} 0 - MEDIA_ERR_CUSTOM\n * @property {string} 1 - MEDIA_ERR_ABORTED\n * @property {string} 2 - MEDIA_ERR_NETWORK\n * @property {string} 3 - MEDIA_ERR_DECODE\n * @property {string} 4 - MEDIA_ERR_SRC_NOT_SUPPORTED\n * @property {string} 5 - MEDIA_ERR_ENCRYPTED\n */\n\nMediaError.errorTypes = ['MEDIA_ERR_CUSTOM', 'MEDIA_ERR_ABORTED', 'MEDIA_ERR_NETWORK', 'MEDIA_ERR_DECODE', 'MEDIA_ERR_SRC_NOT_SUPPORTED', 'MEDIA_ERR_ENCRYPTED'];\n/**\n * The default `MediaError` messages based on the {@link MediaError.errorTypes}.\n *\n * @type {Array}\n * @constant\n */\n\nMediaError.defaultMessages = {\n  1: 'You aborted the media playback',\n  2: 'A network error caused the media download to fail part-way.',\n  3: 'The media playback was aborted due to a corruption problem or because the media used features your browser did not support.',\n  4: 'The media could not be loaded, either because the server or network failed or because the format is not supported.',\n  5: 'The media is encrypted and we do not have the keys to decrypt it.'\n}; // Add types as properties on MediaError\n// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;\n\nfor (var errNum = 0; errNum < MediaError.errorTypes.length; errNum++) {\n  MediaError[MediaError.errorTypes[errNum]] = errNum; // values should be accessible on both the class and instance\n\n  MediaError.prototype[MediaError.errorTypes[errNum]] = errNum;\n} // jsdocs for instance/static members added above\n\n/**\n * Returns whether an object is `Promise`-like (i.e. has a `then` method).\n *\n * @param  {Object}  value\n *         An object that may or may not be `Promise`-like.\n *\n * @return {boolean}\n *         Whether or not the object is `Promise`-like.\n */\nfunction isPromise(value) {\n  return value !== undefined && value !== null && typeof value.then === 'function';\n}\n/**\n * Silence a Promise-like object.\n *\n * This is useful for avoiding non-harmful, but potentially confusing \"uncaught\n * play promise\" rejection error messages.\n *\n * @param  {Object} value\n *         An object that may or may not be `Promise`-like.\n */\n\nfunction silencePromise(value) {\n  if (isPromise(value)) {\n    value.then(null, function (e) {});\n  }\n}\n\n/**\n * @file text-track-list-converter.js Utilities for capturing text track state and\n * re-creating tracks based on a capture.\n *\n * @module text-track-list-converter\n */\n\n/**\n * Examine a single {@link TextTrack} and return a JSON-compatible javascript object that\n * represents the {@link TextTrack}'s state.\n *\n * @param {TextTrack} track\n *        The text track to query.\n *\n * @return {Object}\n *         A serializable javascript representation of the TextTrack.\n * @private\n */\nvar trackToJson_ = function trackToJson_(track) {\n  var ret = ['kind', 'label', 'language', 'id', 'inBandMetadataTrackDispatchType', 'mode', 'src'].reduce(function (acc, prop, i) {\n    if (track[prop]) {\n      acc[prop] = track[prop];\n    }\n\n    return acc;\n  }, {\n    cues: track.cues && Array.prototype.map.call(track.cues, function (cue) {\n      return {\n        startTime: cue.startTime,\n        endTime: cue.endTime,\n        text: cue.text,\n        id: cue.id\n      };\n    })\n  });\n  return ret;\n};\n/**\n * Examine a {@link Tech} and return a JSON-compatible javascript array that represents the\n * state of all {@link TextTrack}s currently configured. The return array is compatible with\n * {@link text-track-list-converter:jsonToTextTracks}.\n *\n * @param {Tech} tech\n *        The tech object to query\n *\n * @return {Array}\n *         A serializable javascript representation of the {@link Tech}s\n *         {@link TextTrackList}.\n */\n\n\nvar textTracksToJson = function textTracksToJson(tech) {\n  var trackEls = tech.$$('track');\n  var trackObjs = Array.prototype.map.call(trackEls, function (t) {\n    return t.track;\n  });\n  var tracks = Array.prototype.map.call(trackEls, function (trackEl) {\n    var json = trackToJson_(trackEl.track);\n\n    if (trackEl.src) {\n      json.src = trackEl.src;\n    }\n\n    return json;\n  });\n  return tracks.concat(Array.prototype.filter.call(tech.textTracks(), function (track) {\n    return trackObjs.indexOf(track) === -1;\n  }).map(trackToJson_));\n};\n/**\n * Create a set of remote {@link TextTrack}s on a {@link Tech} based on an array of javascript\n * object {@link TextTrack} representations.\n *\n * @param {Array} json\n *        An array of `TextTrack` representation objects, like those that would be\n *        produced by `textTracksToJson`.\n *\n * @param {Tech} tech\n *        The `Tech` to create the `TextTrack`s on.\n */\n\n\nvar jsonToTextTracks = function jsonToTextTracks(json, tech) {\n  json.forEach(function (track) {\n    var addedTrack = tech.addRemoteTextTrack(track).track;\n\n    if (!track.src && track.cues) {\n      track.cues.forEach(function (cue) {\n        return addedTrack.addCue(cue);\n      });\n    }\n  });\n  return tech.textTracks();\n};\n\nvar textTrackConverter = {\n  textTracksToJson: textTracksToJson,\n  jsonToTextTracks: jsonToTextTracks,\n  trackToJson_: trackToJson_\n};\n\nvar MODAL_CLASS_NAME = 'vjs-modal-dialog';\n/**\n * The `ModalDialog` displays over the video and its controls, which blocks\n * interaction with the player until it is closed.\n *\n * Modal dialogs include a \"Close\" button and will close when that button\n * is activated - or when ESC is pressed anywhere.\n *\n * @extends Component\n */\n\nvar ModalDialog = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ModalDialog, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Mixed} [options.content=undefined]\n   *        Provide customized content for this modal.\n   *\n   * @param {string} [options.description]\n   *        A text description for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.fillAlways=false]\n   *        Normally, modals are automatically filled only the first time\n   *        they open. This tells the modal to refresh its content\n   *        every time it opens.\n   *\n   * @param {string} [options.label]\n   *        A text label for the modal, primarily for accessibility.\n   *\n   * @param {boolean} [options.pauseOnOpen=true]\n   *        If `true`, playback will will be paused if playing when\n   *        the modal opens, and resumed when it closes.\n   *\n   * @param {boolean} [options.temporary=true]\n   *        If `true`, the modal can only be opened once; it will be\n   *        disposed as soon as it's closed.\n   *\n   * @param {boolean} [options.uncloseable=false]\n   *        If `true`, the user will not be able to close the modal\n   *        through the UI in the normal ways. Programmatic closing is\n   *        still possible.\n   */\n  function ModalDialog(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.close_ = function (e) {\n      return _this.close(e);\n    };\n\n    _this.opened_ = _this.hasBeenOpened_ = _this.hasBeenFilled_ = false;\n\n    _this.closeable(!_this.options_.uncloseable);\n\n    _this.content(_this.options_.content); // Make sure the contentEl is defined AFTER any children are initialized\n    // because we only want the contents of the modal in the contentEl\n    // (not the UI elements like the close button).\n\n\n    _this.contentEl_ = createEl('div', {\n      className: MODAL_CLASS_NAME + \"-content\"\n    }, {\n      role: 'document'\n    });\n    _this.descEl_ = createEl('p', {\n      className: MODAL_CLASS_NAME + \"-description vjs-control-text\",\n      id: _this.el().getAttribute('aria-describedby')\n    });\n    textContent(_this.descEl_, _this.description());\n\n    _this.el_.appendChild(_this.descEl_);\n\n    _this.el_.appendChild(_this.contentEl_);\n\n    return _this;\n  }\n  /**\n   * Create the `ModalDialog`'s DOM element\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n\n\n  var _proto = ModalDialog.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      tabIndex: -1\n    }, {\n      'aria-describedby': this.id() + \"_description\",\n      'aria-hidden': 'true',\n      'aria-label': this.label(),\n      'role': 'dialog'\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.descEl_ = null;\n    this.previouslyActiveEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return MODAL_CLASS_NAME + \" vjs-hidden \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Returns the label string for this modal. Primarily used for accessibility.\n   *\n   * @return {string}\n   *         the localized or raw label of this modal.\n   */\n  ;\n\n  _proto.label = function label() {\n    return this.localize(this.options_.label || 'Modal Window');\n  }\n  /**\n   * Returns the description string for this modal. Primarily used for\n   * accessibility.\n   *\n   * @return {string}\n   *         The localized or raw description of this modal.\n   */\n  ;\n\n  _proto.description = function description() {\n    var desc = this.options_.description || this.localize('This is a modal window.'); // Append a universal closeability message if the modal is closeable.\n\n    if (this.closeable()) {\n      desc += ' ' + this.localize('This modal can be closed by pressing the Escape key or activating the close button.');\n    }\n\n    return desc;\n  }\n  /**\n   * Opens the modal.\n   *\n   * @fires ModalDialog#beforemodalopen\n   * @fires ModalDialog#modalopen\n   */\n  ;\n\n  _proto.open = function open() {\n    if (!this.opened_) {\n      var player = this.player();\n      /**\n        * Fired just before a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#beforemodalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('beforemodalopen');\n      this.opened_ = true; // Fill content if the modal has never opened before and\n      // never been filled.\n\n      if (this.options_.fillAlways || !this.hasBeenOpened_ && !this.hasBeenFilled_) {\n        this.fill();\n      } // If the player was playing, pause it and take note of its previously\n      // playing state.\n\n\n      this.wasPlaying_ = !player.paused();\n\n      if (this.options_.pauseOnOpen && this.wasPlaying_) {\n        player.pause();\n      }\n\n      this.on('keydown', this.handleKeyDown_); // Hide controls and note if they were enabled.\n\n      this.hadControls_ = player.controls();\n      player.controls(false);\n      this.show();\n      this.conditionalFocus_();\n      this.el().setAttribute('aria-hidden', 'false');\n      /**\n        * Fired just after a `ModalDialog` is opened.\n        *\n        * @event ModalDialog#modalopen\n        * @type {EventTarget~Event}\n        */\n\n      this.trigger('modalopen');\n      this.hasBeenOpened_ = true;\n    }\n  }\n  /**\n   * If the `ModalDialog` is currently open or closed.\n   *\n   * @param  {boolean} [value]\n   *         If given, it will open (`true`) or close (`false`) the modal.\n   *\n   * @return {boolean}\n   *         the current open state of the modaldialog\n   */\n  ;\n\n  _proto.opened = function opened(value) {\n    if (typeof value === 'boolean') {\n      this[value ? 'open' : 'close']();\n    }\n\n    return this.opened_;\n  }\n  /**\n   * Closes the modal, does nothing if the `ModalDialog` is\n   * not open.\n   *\n   * @fires ModalDialog#beforemodalclose\n   * @fires ModalDialog#modalclose\n   */\n  ;\n\n  _proto.close = function close() {\n    if (!this.opened_) {\n      return;\n    }\n\n    var player = this.player();\n    /**\n      * Fired just before a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#beforemodalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalclose');\n    this.opened_ = false;\n\n    if (this.wasPlaying_ && this.options_.pauseOnOpen) {\n      player.play();\n    }\n\n    this.off('keydown', this.handleKeyDown_);\n\n    if (this.hadControls_) {\n      player.controls(true);\n    }\n\n    this.hide();\n    this.el().setAttribute('aria-hidden', 'true');\n    /**\n      * Fired just after a `ModalDialog` is closed.\n      *\n      * @event ModalDialog#modalclose\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('modalclose');\n    this.conditionalBlur_();\n\n    if (this.options_.temporary) {\n      this.dispose();\n    }\n  }\n  /**\n   * Check to see if the `ModalDialog` is closeable via the UI.\n   *\n   * @param  {boolean} [value]\n   *         If given as a boolean, it will set the `closeable` option.\n   *\n   * @return {boolean}\n   *         Returns the final value of the closable option.\n   */\n  ;\n\n  _proto.closeable = function closeable(value) {\n    if (typeof value === 'boolean') {\n      var closeable = this.closeable_ = !!value;\n      var close = this.getChild('closeButton'); // If this is being made closeable and has no close button, add one.\n\n      if (closeable && !close) {\n        // The close button should be a child of the modal - not its\n        // content element, so temporarily change the content element.\n        var temp = this.contentEl_;\n        this.contentEl_ = this.el_;\n        close = this.addChild('closeButton', {\n          controlText: 'Close Modal Dialog'\n        });\n        this.contentEl_ = temp;\n        this.on(close, 'close', this.close_);\n      } // If this is being made uncloseable and has a close button, remove it.\n\n\n      if (!closeable && close) {\n        this.off(close, 'close', this.close_);\n        this.removeChild(close);\n        close.dispose();\n      }\n    }\n\n    return this.closeable_;\n  }\n  /**\n   * Fill the modal's content element with the modal's \"content\" option.\n   * The content element will be emptied before this change takes place.\n   */\n  ;\n\n  _proto.fill = function fill() {\n    this.fillWith(this.content());\n  }\n  /**\n   * Fill the modal's content element with arbitrary content.\n   * The content element will be emptied before this change takes place.\n   *\n   * @fires ModalDialog#beforemodalfill\n   * @fires ModalDialog#modalfill\n   *\n   * @param {Mixed} [content]\n   *        The same rules apply to this as apply to the `content` option.\n   */\n  ;\n\n  _proto.fillWith = function fillWith(content) {\n    var contentEl = this.contentEl();\n    var parentEl = contentEl.parentNode;\n    var nextSiblingEl = contentEl.nextSibling;\n    /**\n      * Fired just before a `ModalDialog` is filled with content.\n      *\n      * @event ModalDialog#beforemodalfill\n      * @type {EventTarget~Event}\n      */\n\n    this.trigger('beforemodalfill');\n    this.hasBeenFilled_ = true; // Detach the content element from the DOM before performing\n    // manipulation to avoid modifying the live DOM multiple times.\n\n    parentEl.removeChild(contentEl);\n    this.empty();\n    insertContent(contentEl, content);\n    /**\n     * Fired just after a `ModalDialog` is filled with content.\n     *\n     * @event ModalDialog#modalfill\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('modalfill'); // Re-inject the re-filled content element.\n\n    if (nextSiblingEl) {\n      parentEl.insertBefore(contentEl, nextSiblingEl);\n    } else {\n      parentEl.appendChild(contentEl);\n    } // make sure that the close button is last in the dialog DOM\n\n\n    var closeButton = this.getChild('closeButton');\n\n    if (closeButton) {\n      parentEl.appendChild(closeButton.el_);\n    }\n  }\n  /**\n   * Empties the content element. This happens anytime the modal is filled.\n   *\n   * @fires ModalDialog#beforemodalempty\n   * @fires ModalDialog#modalempty\n   */\n  ;\n\n  _proto.empty = function empty() {\n    /**\n    * Fired just before a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#beforemodalempty\n    * @type {EventTarget~Event}\n    */\n    this.trigger('beforemodalempty');\n    emptyEl(this.contentEl());\n    /**\n    * Fired just after a `ModalDialog` is emptied.\n    *\n    * @event ModalDialog#modalempty\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('modalempty');\n  }\n  /**\n   * Gets or sets the modal content, which gets normalized before being\n   * rendered into the DOM.\n   *\n   * This does not update the DOM or fill the modal, but it is called during\n   * that process.\n   *\n   * @param  {Mixed} [value]\n   *         If defined, sets the internal content value to be used on the\n   *         next call(s) to `fill`. This value is normalized before being\n   *         inserted. To \"clear\" the internal content value, pass `null`.\n   *\n   * @return {Mixed}\n   *         The current content of the modal dialog\n   */\n  ;\n\n  _proto.content = function content(value) {\n    if (typeof value !== 'undefined') {\n      this.content_ = value;\n    }\n\n    return this.content_;\n  }\n  /**\n   * conditionally focus the modal dialog if focus was previously on the player.\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalFocus_ = function conditionalFocus_() {\n    var activeEl = document.activeElement;\n    var playerEl = this.player_.el_;\n    this.previouslyActiveEl_ = null;\n\n    if (playerEl.contains(activeEl) || playerEl === activeEl) {\n      this.previouslyActiveEl_ = activeEl;\n      this.focus();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the last focused element\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    if (this.previouslyActiveEl_) {\n      this.previouslyActiveEl_.focus();\n      this.previouslyActiveEl_ = null;\n    }\n  }\n  /**\n   * Keydown handler. Attached when modal is focused.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Do not allow keydowns to reach out of the modal dialog.\n    event.stopPropagation();\n\n    if (keycode.isEventKey(event, 'Escape') && this.closeable()) {\n      event.preventDefault();\n      this.close();\n      return;\n    } // exit early if it isn't a tab key\n\n\n    if (!keycode.isEventKey(event, 'Tab')) {\n      return;\n    }\n\n    var focusableEls = this.focusableEls_();\n    var activeEl = this.el_.querySelector(':focus');\n    var focusIndex;\n\n    for (var i = 0; i < focusableEls.length; i++) {\n      if (activeEl === focusableEls[i]) {\n        focusIndex = i;\n        break;\n      }\n    }\n\n    if (document.activeElement === this.el_) {\n      focusIndex = 0;\n    }\n\n    if (event.shiftKey && focusIndex === 0) {\n      focusableEls[focusableEls.length - 1].focus();\n      event.preventDefault();\n    } else if (!event.shiftKey && focusIndex === focusableEls.length - 1) {\n      focusableEls[0].focus();\n      event.preventDefault();\n    }\n  }\n  /**\n   * get all focusable elements\n   *\n   * @private\n   */\n  ;\n\n  _proto.focusableEls_ = function focusableEls_() {\n    var allChildren = this.el_.querySelectorAll('*');\n    return Array.prototype.filter.call(allChildren, function (child) {\n      return (child instanceof window$1.HTMLAnchorElement || child instanceof window$1.HTMLAreaElement) && child.hasAttribute('href') || (child instanceof window$1.HTMLInputElement || child instanceof window$1.HTMLSelectElement || child instanceof window$1.HTMLTextAreaElement || child instanceof window$1.HTMLButtonElement) && !child.hasAttribute('disabled') || child instanceof window$1.HTMLIFrameElement || child instanceof window$1.HTMLObjectElement || child instanceof window$1.HTMLEmbedElement || child.hasAttribute('tabindex') && child.getAttribute('tabindex') !== -1 || child.hasAttribute('contenteditable');\n    });\n  };\n\n  return ModalDialog;\n}(Component$1);\n/**\n * Default options for `ModalDialog` default options.\n *\n * @type {Object}\n * @private\n */\n\n\nModalDialog.prototype.options_ = {\n  pauseOnOpen: true,\n  temporary: true\n};\nComponent$1.registerComponent('ModalDialog', ModalDialog);\n\n/**\n * Common functionaliy between {@link TextTrackList}, {@link AudioTrackList}, and\n * {@link VideoTrackList}\n *\n * @extends EventTarget\n */\n\nvar TrackList = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(TrackList, _EventTarget);\n\n  /**\n   * Create an instance of this class\n   *\n   * @param {Track[]} tracks\n   *        A list of tracks to initialize the list with.\n   *\n   * @abstract\n   */\n  function TrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.tracks_ = [];\n    /**\n     * @memberof TrackList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'length', {\n      get: function get() {\n        return this.tracks_.length;\n      }\n    });\n\n    for (var i = 0; i < tracks.length; i++) {\n      _this.addTrack(tracks[i]);\n    }\n\n    return _this;\n  }\n  /**\n   * Add a {@link Track} to the `TrackList`\n   *\n   * @param {Track} track\n   *        The audio, video, or text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = TrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    var index = this.tracks_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.tracks_[index];\n        }\n      });\n    } // Do not add duplicate tracks\n\n\n    if (this.tracks_.indexOf(track) === -1) {\n      this.tracks_.push(track);\n      /**\n       * Triggered when a track is added to a track list.\n       *\n       * @event TrackList#addtrack\n       * @type {EventTarget~Event}\n       * @property {Track} track\n       *           A reference to track that was added.\n       */\n\n      this.trigger({\n        track: track,\n        type: 'addtrack',\n        target: this\n      });\n    }\n    /**\n     * Triggered when a track label is changed.\n     *\n     * @event TrackList#addtrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was added.\n     */\n\n\n    track.labelchange_ = function () {\n      _this2.trigger({\n        track: track,\n        type: 'labelchange',\n        target: _this2\n      });\n    };\n\n    if (isEvented(track)) {\n      track.addEventListener('labelchange', track.labelchange_);\n    }\n  }\n  /**\n   * Remove a {@link Track} from the `TrackList`\n   *\n   * @param {Track} rtrack\n   *        The audio, video, or text track to remove from the list.\n   *\n   * @fires TrackList#removetrack\n   */\n  ;\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    var track;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      if (this[i] === rtrack) {\n        track = this[i];\n\n        if (track.off) {\n          track.off();\n        }\n\n        this.tracks_.splice(i, 1);\n        break;\n      }\n    }\n\n    if (!track) {\n      return;\n    }\n    /**\n     * Triggered when a track is removed from track list.\n     *\n     * @event TrackList#removetrack\n     * @type {EventTarget~Event}\n     * @property {Track} track\n     *           A reference to track that was removed.\n     */\n\n\n    this.trigger({\n      track: track,\n      type: 'removetrack',\n      target: this\n    });\n  }\n  /**\n   * Get a Track from the TrackList by a tracks id\n   *\n   * @param {string} id - the id of the track to get\n   * @method getTrackById\n   * @return {Track}\n   * @private\n   */\n  ;\n\n  _proto.getTrackById = function getTrackById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var track = this[i];\n\n      if (track.id === id) {\n        result = track;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TrackList;\n}(EventTarget$2);\n/**\n * Triggered when a different track is selected/enabled.\n *\n * @event TrackList#change\n * @type {EventTarget~Event}\n */\n\n/**\n * Events that can be called with on + eventName. See {@link EventHandler}.\n *\n * @property {Object} TrackList#allowedEvents_\n * @private\n */\n\n\nTrackList.prototype.allowedEvents_ = {\n  change: 'change',\n  addtrack: 'addtrack',\n  removetrack: 'removetrack',\n  labelchange: 'labelchange'\n}; // emulate attribute EventHandler support to allow for feature detection\n\nfor (var event in TrackList.prototype.allowedEvents_) {\n  TrackList.prototype['on' + event] = null;\n}\n\n/**\n * Anywhere we call this function we diverge from the spec\n * as we only support one enabled audiotrack at a time\n *\n * @param {AudioTrackList} list\n *        list to work on\n *\n * @param {AudioTrack} track\n *        The track to skip\n *\n * @private\n */\n\nvar disableOthers$1 = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another audio track is enabled, disable it\n\n\n    list[i].enabled = false;\n  }\n};\n/**\n * The current list of {@link AudioTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist}\n * @extends TrackList\n */\n\n\nvar AudioTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(AudioTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {AudioTrack[]} [tracks=[]]\n   *        A list of `AudioTrack` to instantiate the list with.\n   */\n  function AudioTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].enabled) {\n        disableOthers$1(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    return _this;\n  }\n  /**\n   * Add an {@link AudioTrack} to the `AudioTrackList`.\n   *\n   * @param {AudioTrack} track\n   *        The AudioTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = AudioTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.enabled) {\n      disableOthers$1(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.enabledChange_ = function () {\n      // when we are disabling other tracks (since we don't support\n      // more than one track at a time) we will set changing_\n      // to true so that we don't trigger additional change events\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers$1(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens AudioTrack#enabledchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('enabledchange', track.enabledChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.enabledChange_) {\n      rtrack.removeEventListener('enabledchange', rtrack.enabledChange_);\n      rtrack.enabledChange_ = null;\n    }\n  };\n\n  return AudioTrackList;\n}(TrackList);\n\n/**\n * Un-select all other {@link VideoTrack}s that are selected.\n *\n * @param {VideoTrackList} list\n *        list to work on\n *\n * @param {VideoTrack} track\n *        The track to skip\n *\n * @private\n */\n\nvar disableOthers = function disableOthers(list, track) {\n  for (var i = 0; i < list.length; i++) {\n    if (!Object.keys(list[i]).length || track.id === list[i].id) {\n      continue;\n    } // another video track is enabled, disable it\n\n\n    list[i].selected = false;\n  }\n};\n/**\n * The current list of {@link VideoTrack} for a video.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist}\n * @extends TrackList\n */\n\n\nvar VideoTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(VideoTrackList, _TrackList);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {VideoTrack[]} [tracks=[]]\n   *        A list of `VideoTrack` to instantiate the list with.\n   */\n  function VideoTrackList(tracks) {\n    var _this;\n\n    if (tracks === void 0) {\n      tracks = [];\n    }\n\n    // make sure only 1 track is enabled\n    // sorted from last index to first index\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      if (tracks[i].selected) {\n        disableOthers(tracks, tracks[i]);\n        break;\n      }\n    }\n\n    _this = _TrackList.call(this, tracks) || this;\n    _this.changing_ = false;\n    /**\n     * @member {number} VideoTrackList#selectedIndex\n     *         The current index of the selected {@link VideoTrack`}.\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selectedIndex', {\n      get: function get() {\n        for (var _i = 0; _i < this.length; _i++) {\n          if (this[_i].selected) {\n            return _i;\n          }\n        }\n\n        return -1;\n      },\n      set: function set() {}\n    });\n    return _this;\n  }\n  /**\n   * Add a {@link VideoTrack} to the `VideoTrackList`.\n   *\n   * @param {VideoTrack} track\n   *        The VideoTrack to add to the list\n   *\n   * @fires TrackList#addtrack\n   */\n\n\n  var _proto = VideoTrackList.prototype;\n\n  _proto.addTrack = function addTrack(track) {\n    var _this2 = this;\n\n    if (track.selected) {\n      disableOthers(this, track);\n    }\n\n    _TrackList.prototype.addTrack.call(this, track); // native tracks don't have this\n\n\n    if (!track.addEventListener) {\n      return;\n    }\n\n    track.selectedChange_ = function () {\n      if (_this2.changing_) {\n        return;\n      }\n\n      _this2.changing_ = true;\n      disableOthers(_this2, track);\n      _this2.changing_ = false;\n\n      _this2.trigger('change');\n    };\n    /**\n     * @listens VideoTrack#selectedchange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('selectedchange', track.selectedChange_);\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack);\n\n    if (rtrack.removeEventListener && rtrack.selectedChange_) {\n      rtrack.removeEventListener('selectedchange', rtrack.selectedChange_);\n      rtrack.selectedChange_ = null;\n    }\n  };\n\n  return VideoTrackList;\n}(TrackList);\n\n/**\n * The current list of {@link TextTrack} for a media file.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist}\n * @extends TrackList\n */\n\nvar TextTrackList = /*#__PURE__*/function (_TrackList) {\n  _inheritsLoose(TextTrackList, _TrackList);\n\n  function TextTrackList() {\n    return _TrackList.apply(this, arguments) || this;\n  }\n\n  var _proto = TextTrackList.prototype;\n\n  /**\n   * Add a {@link TextTrack} to the `TextTrackList`\n   *\n   * @param {TextTrack} track\n   *        The text track to add to the list.\n   *\n   * @fires TrackList#addtrack\n   */\n  _proto.addTrack = function addTrack(track) {\n    var _this = this;\n\n    _TrackList.prototype.addTrack.call(this, track);\n\n    if (!this.queueChange_) {\n      this.queueChange_ = function () {\n        return _this.queueTrigger('change');\n      };\n    }\n\n    if (!this.triggerSelectedlanguagechange) {\n      this.triggerSelectedlanguagechange_ = function () {\n        return _this.trigger('selectedlanguagechange');\n      };\n    }\n    /**\n     * @listens TextTrack#modechange\n     * @fires TrackList#change\n     */\n\n\n    track.addEventListener('modechange', this.queueChange_);\n    var nonLanguageTextTrackKind = ['metadata', 'chapters'];\n\n    if (nonLanguageTextTrackKind.indexOf(track.kind) === -1) {\n      track.addEventListener('modechange', this.triggerSelectedlanguagechange_);\n    }\n  };\n\n  _proto.removeTrack = function removeTrack(rtrack) {\n    _TrackList.prototype.removeTrack.call(this, rtrack); // manually remove the event handlers we added\n\n\n    if (rtrack.removeEventListener) {\n      if (this.queueChange_) {\n        rtrack.removeEventListener('modechange', this.queueChange_);\n      }\n\n      if (this.selectedlanguagechange_) {\n        rtrack.removeEventListener('modechange', this.triggerSelectedlanguagechange_);\n      }\n    }\n  };\n\n  return TextTrackList;\n}(TrackList);\n\n/**\n * @file html-track-element-list.js\n */\n\n/**\n * The current list of {@link HtmlTrackElement}s.\n */\nvar HtmlTrackElementList = /*#__PURE__*/function () {\n  /**\n   * Create an instance of this class.\n   *\n   * @param {HtmlTrackElement[]} [tracks=[]]\n   *        A list of `HtmlTrackElement` to instantiate the list with.\n   */\n  function HtmlTrackElementList(trackElements) {\n    if (trackElements === void 0) {\n      trackElements = [];\n    }\n\n    this.trackElements_ = [];\n    /**\n     * @memberof HtmlTrackElementList\n     * @member {number} length\n     *         The current number of `Track`s in the this Trackist.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.trackElements_.length;\n      }\n    });\n\n    for (var i = 0, length = trackElements.length; i < length; i++) {\n      this.addTrackElement_(trackElements[i]);\n    }\n  }\n  /**\n   * Add an {@link HtmlTrackElement} to the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to add to the list.\n   *\n   * @private\n   */\n\n\n  var _proto = HtmlTrackElementList.prototype;\n\n  _proto.addTrackElement_ = function addTrackElement_(trackElement) {\n    var index = this.trackElements_.length;\n\n    if (!('' + index in this)) {\n      Object.defineProperty(this, index, {\n        get: function get() {\n          return this.trackElements_[index];\n        }\n      });\n    } // Do not add duplicate elements\n\n\n    if (this.trackElements_.indexOf(trackElement) === -1) {\n      this.trackElements_.push(trackElement);\n    }\n  }\n  /**\n   * Get an {@link HtmlTrackElement} from the `HtmlTrackElementList` given an\n   * {@link TextTrack}.\n   *\n   * @param {TextTrack} track\n   *        The track associated with a track element.\n   *\n   * @return {HtmlTrackElement|undefined}\n   *         The track element that was found or undefined.\n   *\n   * @private\n   */\n  ;\n\n  _proto.getTrackElementByTrack_ = function getTrackElementByTrack_(track) {\n    var trackElement_;\n\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (track === this.trackElements_[i].track) {\n        trackElement_ = this.trackElements_[i];\n        break;\n      }\n    }\n\n    return trackElement_;\n  }\n  /**\n   * Remove a {@link HtmlTrackElement} from the `HtmlTrackElementList`\n   *\n   * @param {HtmlTrackElement} trackElement\n   *        The track element to remove from the list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTrackElement_ = function removeTrackElement_(trackElement) {\n    for (var i = 0, length = this.trackElements_.length; i < length; i++) {\n      if (trackElement === this.trackElements_[i]) {\n        if (this.trackElements_[i].track && typeof this.trackElements_[i].track.off === 'function') {\n          this.trackElements_[i].track.off();\n        }\n\n        if (typeof this.trackElements_[i].off === 'function') {\n          this.trackElements_[i].off();\n        }\n\n        this.trackElements_.splice(i, 1);\n        break;\n      }\n    }\n  };\n\n  return HtmlTrackElementList;\n}();\n\n/**\n * @file text-track-cue-list.js\n */\n\n/**\n * @typedef {Object} TextTrackCueList~TextTrackCue\n *\n * @property {string} id\n *           The unique id for this text track cue\n *\n * @property {number} startTime\n *           The start time for this text track cue\n *\n * @property {number} endTime\n *           The end time for this text track cue\n *\n * @property {boolean} pauseOnExit\n *           Pause when the end time is reached if true.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcue}\n */\n\n/**\n * A List of TextTrackCues.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist}\n */\nvar TextTrackCueList = /*#__PURE__*/function () {\n  /**\n   * Create an instance of this class..\n   *\n   * @param {Array} cues\n   *        A list of cues to be initialized with\n   */\n  function TextTrackCueList(cues) {\n    TextTrackCueList.prototype.setCues_.call(this, cues);\n    /**\n     * @memberof TextTrackCueList\n     * @member {number} length\n     *         The current number of `TextTrackCue`s in the TextTrackCueList.\n     * @instance\n     */\n\n    Object.defineProperty(this, 'length', {\n      get: function get() {\n        return this.length_;\n      }\n    });\n  }\n  /**\n   * A setter for cues in this list. Creates getters\n   * an an index for the cues.\n   *\n   * @param {Array} cues\n   *        An array of cues to set\n   *\n   * @private\n   */\n\n\n  var _proto = TextTrackCueList.prototype;\n\n  _proto.setCues_ = function setCues_(cues) {\n    var oldLength = this.length || 0;\n    var i = 0;\n    var l = cues.length;\n    this.cues_ = cues;\n    this.length_ = cues.length;\n\n    var defineProp = function defineProp(index) {\n      if (!('' + index in this)) {\n        Object.defineProperty(this, '' + index, {\n          get: function get() {\n            return this.cues_[index];\n          }\n        });\n      }\n    };\n\n    if (oldLength < l) {\n      i = oldLength;\n\n      for (; i < l; i++) {\n        defineProp.call(this, i);\n      }\n    }\n  }\n  /**\n   * Get a `TextTrackCue` that is currently in the `TextTrackCueList` by id.\n   *\n   * @param {string} id\n   *        The id of the cue that should be searched for.\n   *\n   * @return {TextTrackCueList~TextTrackCue|null}\n   *         A single cue or null if none was found.\n   */\n  ;\n\n  _proto.getCueById = function getCueById(id) {\n    var result = null;\n\n    for (var i = 0, l = this.length; i < l; i++) {\n      var cue = this[i];\n\n      if (cue.id === id) {\n        result = cue;\n        break;\n      }\n    }\n\n    return result;\n  };\n\n  return TextTrackCueList;\n}();\n\n/**\n * @file track-kinds.js\n */\n\n/**\n * All possible `VideoTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-videotrack-kind\n * @typedef VideoTrack~Kind\n * @enum\n */\nvar VideoTrackKind = {\n  alternative: 'alternative',\n  captions: 'captions',\n  main: 'main',\n  sign: 'sign',\n  subtitles: 'subtitles',\n  commentary: 'commentary'\n};\n/**\n * All possible `AudioTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-audiotrack-kind\n * @typedef AudioTrack~Kind\n * @enum\n */\n\nvar AudioTrackKind = {\n  'alternative': 'alternative',\n  'descriptions': 'descriptions',\n  'main': 'main',\n  'main-desc': 'main-desc',\n  'translation': 'translation',\n  'commentary': 'commentary'\n};\n/**\n * All possible `TextTrackKind`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-texttrack-kind\n * @typedef TextTrack~Kind\n * @enum\n */\n\nvar TextTrackKind = {\n  subtitles: 'subtitles',\n  captions: 'captions',\n  descriptions: 'descriptions',\n  chapters: 'chapters',\n  metadata: 'metadata'\n};\n/**\n * All possible `TextTrackMode`s\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode\n * @typedef TextTrack~Mode\n * @enum\n */\n\nvar TextTrackMode = {\n  disabled: 'disabled',\n  hidden: 'hidden',\n  showing: 'showing'\n};\n\n/**\n * A Track class that contains all of the common functionality for {@link AudioTrack},\n * {@link VideoTrack}, and {@link TextTrack}.\n *\n * > Note: This class should not be used directly\n *\n * @see {@link https://html.spec.whatwg.org/multipage/embedded-content.html}\n * @extends EventTarget\n * @abstract\n */\n\nvar Track = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(Track, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid kind for the track type you are creating.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @abstract\n   */\n  function Track(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var trackProps = {\n      id: options.id || 'vjs_track_' + newGUID(),\n      kind: options.kind || '',\n      language: options.language || ''\n    };\n    var label = options.label || '';\n    /**\n     * @memberof Track\n     * @member {string} id\n     *         The id of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} kind\n     *         The kind of track that this is. Cannot be changed after creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    /**\n     * @memberof Track\n     * @member {string} language\n     *         The two letter language code for this track. Cannot be changed after\n     *         creation.\n     * @instance\n     *\n     * @readonly\n     */\n\n    var _loop = function _loop(key) {\n      Object.defineProperty(_assertThisInitialized(_this), key, {\n        get: function get() {\n          return trackProps[key];\n        },\n        set: function set() {}\n      });\n    };\n\n    for (var key in trackProps) {\n      _loop(key);\n    }\n    /**\n     * @memberof Track\n     * @member {string} label\n     *         The label of this track. Cannot be changed after creation.\n     * @instance\n     *\n     * @fires Track#labelchange\n     */\n\n\n    Object.defineProperty(_assertThisInitialized(_this), 'label', {\n      get: function get() {\n        return label;\n      },\n      set: function set(newLabel) {\n        if (newLabel !== label) {\n          label = newLabel;\n          /**\n           * An event that fires when label changes on this track.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event Track#labelchange\n           * @type {EventTarget~Event}\n           */\n\n          this.trigger('labelchange');\n        }\n      }\n    });\n    return _this;\n  }\n\n  return Track;\n}(EventTarget$2);\n\n/**\n * @file url.js\n * @module url\n */\n/**\n * @typedef {Object} url:URLObject\n *\n * @property {string} protocol\n *           The protocol of the url that was parsed.\n *\n * @property {string} hostname\n *           The hostname of the url that was parsed.\n *\n * @property {string} port\n *           The port of the url that was parsed.\n *\n * @property {string} pathname\n *           The pathname of the url that was parsed.\n *\n * @property {string} search\n *           The search query of the url that was parsed.\n *\n * @property {string} hash\n *           The hash of the url that was parsed.\n *\n * @property {string} host\n *           The host of the url that was parsed.\n */\n\n/**\n * Resolve and parse the elements of a URL.\n *\n * @function\n * @param    {String} url\n *           The url to parse\n *\n * @return   {url:URLObject}\n *           An object of url details\n */\n\nvar parseUrl = function parseUrl(url) {\n  // This entire method can be replace with URL once we are able to drop IE11\n  var props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host']; // add the url to an anchor and let the browser parse the URL\n\n  var a = document.createElement('a');\n  a.href = url; // Copy the specific URL properties to a new object\n  // This is also needed for IE because the anchor loses its\n  // properties when it's removed from the dom\n\n  var details = {};\n\n  for (var i = 0; i < props.length; i++) {\n    details[props[i]] = a[props[i]];\n  } // IE adds the port to the host property unlike everyone else. If\n  // a port identifier is added for standard ports, strip it.\n\n\n  if (details.protocol === 'http:') {\n    details.host = details.host.replace(/:80$/, '');\n  }\n\n  if (details.protocol === 'https:') {\n    details.host = details.host.replace(/:443$/, '');\n  }\n\n  if (!details.protocol) {\n    details.protocol = window$1.location.protocol;\n  }\n  /* istanbul ignore if */\n\n\n  if (!details.host) {\n    details.host = window$1.location.host;\n  }\n\n  return details;\n};\n/**\n * Get absolute version of relative URL. Used to tell Flash the correct URL.\n *\n * @function\n * @param    {string} url\n *           URL to make absolute\n *\n * @return   {string}\n *           Absolute URL\n *\n * @see      http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue\n */\n\nvar getAbsoluteURL = function getAbsoluteURL(url) {\n  // Check if absolute URL\n  if (!url.match(/^https?:\\/\\//)) {\n    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.\n    // add the url to an anchor and let the browser parse the URL\n    var a = document.createElement('a');\n    a.href = url;\n    url = a.href;\n  }\n\n  return url;\n};\n/**\n * Returns the extension of the passed file name. It will return an empty string\n * if passed an invalid path.\n *\n * @function\n * @param    {string} path\n *           The fileName path like '/path/to/file.mp4'\n *\n * @return  {string}\n *           The extension in lower case or an empty string if no\n *           extension could be found.\n */\n\nvar getFileExtension = function getFileExtension(path) {\n  if (typeof path === 'string') {\n    var splitPathRe = /^(\\/?)([\\s\\S]*?)((?:\\.{1,2}|[^\\/]+?)(\\.([^\\.\\/\\?]+)))(?:[\\/]*|[\\?].*)$/;\n    var pathParts = splitPathRe.exec(path);\n\n    if (pathParts) {\n      return pathParts.pop().toLowerCase();\n    }\n  }\n\n  return '';\n};\n/**\n * Returns whether the url passed is a cross domain request or not.\n *\n * @function\n * @param    {string} url\n *           The url to check.\n *\n * @param    {Object} [winLoc]\n *           the domain to check the url against, defaults to window.location\n *\n * @param    {string} [winLoc.protocol]\n *           The window location protocol defaults to window.location.protocol\n *\n * @param    {string} [winLoc.host]\n *           The window location host defaults to window.location.host\n *\n * @return   {boolean}\n *           Whether it is a cross domain request or not.\n */\n\nvar isCrossOrigin = function isCrossOrigin(url, winLoc) {\n  if (winLoc === void 0) {\n    winLoc = window$1.location;\n  }\n\n  var urlInfo = parseUrl(url); // IE8 protocol relative urls will return ':' for protocol\n\n  var srcProtocol = urlInfo.protocol === ':' ? winLoc.protocol : urlInfo.protocol; // Check if url is for another domain/origin\n  // IE8 doesn't know location.origin, so we won't rely on it here\n\n  var crossOrigin = srcProtocol + urlInfo.host !== winLoc.protocol + winLoc.host;\n  return crossOrigin;\n};\n\nvar Url = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  parseUrl: parseUrl,\n  getAbsoluteURL: getAbsoluteURL,\n  getFileExtension: getFileExtension,\n  isCrossOrigin: isCrossOrigin\n});\n\n/**\n * Takes a webvtt file contents and parses it into cues\n *\n * @param {string} srcContent\n *        webVTT file contents\n *\n * @param {TextTrack} track\n *        TextTrack to add cues to. Cues come from the srcContent.\n *\n * @private\n */\n\nvar parseCues = function parseCues(srcContent, track) {\n  var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, window$1.WebVTT.StringDecoder());\n  var errors = [];\n\n  parser.oncue = function (cue) {\n    track.addCue(cue);\n  };\n\n  parser.onparsingerror = function (error) {\n    errors.push(error);\n  };\n\n  parser.onflush = function () {\n    track.trigger({\n      type: 'loadeddata',\n      target: track\n    });\n  };\n\n  parser.parse(srcContent);\n\n  if (errors.length > 0) {\n    if (window$1.console && window$1.console.groupCollapsed) {\n      window$1.console.groupCollapsed(\"Text Track parsing errors for \" + track.src);\n    }\n\n    errors.forEach(function (error) {\n      return log$1.error(error);\n    });\n\n    if (window$1.console && window$1.console.groupEnd) {\n      window$1.console.groupEnd();\n    }\n  }\n\n  parser.flush();\n};\n/**\n * Load a `TextTrack` from a specified url.\n *\n * @param {string} src\n *        Url to load track from.\n *\n * @param {TextTrack} track\n *        Track to add cues to. Comes from the content at the end of `url`.\n *\n * @private\n */\n\n\nvar loadTrack = function loadTrack(src, track) {\n  var opts = {\n    uri: src\n  };\n  var crossOrigin = isCrossOrigin(src);\n\n  if (crossOrigin) {\n    opts.cors = crossOrigin;\n  }\n\n  var withCredentials = track.tech_.crossOrigin() === 'use-credentials';\n\n  if (withCredentials) {\n    opts.withCredentials = withCredentials;\n  }\n\n  XHR(opts, bind(this, function (err, response, responseBody) {\n    if (err) {\n      return log$1.error(err, response);\n    }\n\n    track.loaded_ = true; // Make sure that vttjs has loaded, otherwise, wait till it finished loading\n    // NOTE: this is only used for the alt/video.novtt.js build\n\n    if (typeof window$1.WebVTT !== 'function') {\n      if (track.tech_) {\n        // to prevent use before define eslint error, we define loadHandler\n        // as a let here\n        track.tech_.any(['vttjsloaded', 'vttjserror'], function (event) {\n          if (event.type === 'vttjserror') {\n            log$1.error(\"vttjs failed to load, stopping trying to process \" + track.src);\n            return;\n          }\n\n          return parseCues(responseBody, track);\n        });\n      }\n    } else {\n      parseCues(responseBody, track);\n    }\n  }));\n};\n/**\n * A representation of a single `TextTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack}\n * @extends Track\n */\n\n\nvar TextTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(TextTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this TextTrack.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function TextTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!options.tech) {\n      throw new Error('A tech was not provided.');\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: TextTrackKind[options.kind] || 'subtitles',\n      language: options.language || options.srclang || ''\n    });\n    var mode = TextTrackMode[settings.mode] || 'disabled';\n    var default_ = settings[\"default\"];\n\n    if (settings.kind === 'metadata' || settings.kind === 'chapters') {\n      mode = 'hidden';\n    }\n\n    _this = _Track.call(this, settings) || this;\n    _this.tech_ = settings.tech;\n    _this.cues_ = [];\n    _this.activeCues_ = [];\n    _this.preload_ = _this.tech_.preloadTextTracks !== false;\n    var cues = new TextTrackCueList(_this.cues_);\n    var activeCues = new TextTrackCueList(_this.activeCues_);\n    var changed = false;\n    _this.timeupdateHandler = bind(_assertThisInitialized(_this), function (event) {\n      if (event === void 0) {\n        event = {};\n      }\n\n      if (this.tech_.isDisposed()) {\n        return;\n      }\n\n      if (!this.tech_.isReady_) {\n        if (event.type !== 'timeupdate') {\n          this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n        }\n\n        return;\n      } // Accessing this.activeCues for the side-effects of updating itself\n      // due to its nature as a getter function. Do not remove or cues will\n      // stop updating!\n      // Use the setter to prevent deletion from uglify (pure_getters rule)\n\n\n      this.activeCues = this.activeCues;\n\n      if (changed) {\n        this.trigger('cuechange');\n        changed = false;\n      }\n\n      if (event.type !== 'timeupdate') {\n        this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler);\n      }\n    });\n\n    var disposeHandler = function disposeHandler() {\n      _this.stopTracking();\n    };\n\n    _this.tech_.one('dispose', disposeHandler);\n\n    if (mode !== 'disabled') {\n      _this.startTracking();\n    }\n\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof TextTrack\n       * @member {boolean} default\n       *         If this track was set to be on or off by default. Cannot be changed after\n       *         creation.\n       * @instance\n       *\n       * @readonly\n       */\n      \"default\": {\n        get: function get() {\n          return default_;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {string} mode\n       *         Set the mode of this TextTrack to a valid {@link TextTrack~Mode}. Will\n       *         not be set if setting to an invalid mode.\n       * @instance\n       *\n       * @fires TextTrack#modechange\n       */\n      mode: {\n        get: function get() {\n          return mode;\n        },\n        set: function set(newMode) {\n          if (!TextTrackMode[newMode]) {\n            return;\n          }\n\n          if (mode === newMode) {\n            return;\n          }\n\n          mode = newMode;\n\n          if (!this.preload_ && mode !== 'disabled' && this.cues.length === 0) {\n            // On-demand load.\n            loadTrack(this.src, this);\n          }\n\n          this.stopTracking();\n\n          if (mode !== 'disabled') {\n            this.startTracking();\n          }\n          /**\n           * An event that fires when mode changes on this track. This allows\n           * the TextTrackList that holds this track to act accordingly.\n           *\n           * > Note: This is not part of the spec!\n           *\n           * @event TextTrack#modechange\n           * @type {EventTarget~Event}\n           */\n\n\n          this.trigger('modechange');\n        }\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} cues\n       *         The text track cue list for this TextTrack.\n       * @instance\n       */\n      cues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          }\n\n          return cues;\n        },\n        set: function set() {}\n      },\n\n      /**\n       * @memberof TextTrack\n       * @member {TextTrackCueList} activeCues\n       *         The list text track cues that are currently active for this TextTrack.\n       * @instance\n       */\n      activeCues: {\n        get: function get() {\n          if (!this.loaded_) {\n            return null;\n          } // nothing to do\n\n\n          if (this.cues.length === 0) {\n            return activeCues;\n          }\n\n          var ct = this.tech_.currentTime();\n          var active = [];\n\n          for (var i = 0, l = this.cues.length; i < l; i++) {\n            var cue = this.cues[i];\n\n            if (cue.startTime <= ct && cue.endTime >= ct) {\n              active.push(cue);\n            } else if (cue.startTime === cue.endTime && cue.startTime <= ct && cue.startTime + 0.5 >= ct) {\n              active.push(cue);\n            }\n          }\n\n          changed = false;\n\n          if (active.length !== this.activeCues_.length) {\n            changed = true;\n          } else {\n            for (var _i = 0; _i < active.length; _i++) {\n              if (this.activeCues_.indexOf(active[_i]) === -1) {\n                changed = true;\n              }\n            }\n          }\n\n          this.activeCues_ = active;\n          activeCues.setCues_(this.activeCues_);\n          return activeCues;\n        },\n        // /!\\ Keep this setter empty (see the timeupdate handler above)\n        set: function set() {}\n      }\n    });\n\n    if (settings.src) {\n      _this.src = settings.src;\n\n      if (!_this.preload_) {\n        // Tracks will load on-demand.\n        // Act like we're loaded for other purposes.\n        _this.loaded_ = true;\n      }\n\n      if (_this.preload_ || settings.kind !== 'subtitles' && settings.kind !== 'captions') {\n        loadTrack(_this.src, _assertThisInitialized(_this));\n      }\n    } else {\n      _this.loaded_ = true;\n    }\n\n    return _this;\n  }\n\n  var _proto = TextTrack.prototype;\n\n  _proto.startTracking = function startTracking() {\n    // More precise cues based on requestVideoFrameCallback with a requestAnimationFram fallback\n    this.rvf_ = this.tech_.requestVideoFrameCallback(this.timeupdateHandler); // Also listen to timeupdate in case rVFC/rAF stops (window in background, audio in video el)\n\n    this.tech_.on('timeupdate', this.timeupdateHandler);\n  };\n\n  _proto.stopTracking = function stopTracking() {\n    if (this.rvf_) {\n      this.tech_.cancelVideoFrameCallback(this.rvf_);\n      this.rvf_ = undefined;\n    }\n\n    this.tech_.off('timeupdate', this.timeupdateHandler);\n  }\n  /**\n   * Add a cue to the internal list of cues.\n   *\n   * @param {TextTrack~Cue} cue\n   *        The cue to add to our internal list\n   */\n  ;\n\n  _proto.addCue = function addCue(originalCue) {\n    var cue = originalCue;\n\n    if (cue.constructor && cue.constructor.name !== 'VTTCue') {\n      cue = new window$1.vttjs.VTTCue(originalCue.startTime, originalCue.endTime, originalCue.text);\n\n      for (var prop in originalCue) {\n        if (!(prop in cue)) {\n          cue[prop] = originalCue[prop];\n        }\n      } // make sure that `id` is copied over\n\n\n      cue.id = originalCue.id;\n      cue.originalCue_ = originalCue;\n    }\n\n    var tracks = this.tech_.textTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      if (tracks[i] !== this) {\n        tracks[i].removeCue(cue);\n      }\n    }\n\n    this.cues_.push(cue);\n    this.cues.setCues_(this.cues_);\n  }\n  /**\n   * Remove a cue from our internal list\n   *\n   * @param {TextTrack~Cue} removeCue\n   *        The cue to remove from our internal list\n   */\n  ;\n\n  _proto.removeCue = function removeCue(_removeCue) {\n    var i = this.cues_.length;\n\n    while (i--) {\n      var cue = this.cues_[i];\n\n      if (cue === _removeCue || cue.originalCue_ && cue.originalCue_ === _removeCue) {\n        this.cues_.splice(i, 1);\n        this.cues.setCues_(this.cues_);\n        break;\n      }\n    }\n  };\n\n  return TextTrack;\n}(Track);\n/**\n * cuechange - One or more cues in the track have become active or stopped being active.\n */\n\n\nTextTrack.prototype.allowedEvents_ = {\n  cuechange: 'cuechange'\n};\n\n/**\n * A representation of a single `AudioTrack`. If it is part of an {@link AudioTrackList}\n * only one `AudioTrack` in the list will be enabled at a time.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotrack}\n * @extends Track\n */\n\nvar AudioTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(AudioTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {AudioTrack~Kind} [options.kind='']\n   *        A valid audio track kind\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.enabled]\n   *        If this track is the one that is currently playing. If this track is part of\n   *        an {@link AudioTrackList}, only one {@link AudioTrack} will be enabled.\n   */\n  function AudioTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: AudioTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var enabled = false;\n    /**\n     * @memberof AudioTrack\n     * @member {boolean} enabled\n     *         If this `AudioTrack` is enabled or not. When setting this will\n     *         fire {@link AudioTrack#enabledchange} if the state of enabled is changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'enabled', {\n      get: function get() {\n        return enabled;\n      },\n      set: function set(newEnabled) {\n        // an invalid or unchanged value\n        if (typeof newEnabled !== 'boolean' || newEnabled === enabled) {\n          return;\n        }\n\n        enabled = newEnabled;\n        /**\n         * An event that fires when enabled changes on this track. This allows\n         * the AudioTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event AudioTrack#enabledchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('enabledchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.enabled) {\n      _this.enabled = settings.enabled;\n    }\n\n    _this.loaded_ = true;\n    return _this;\n  }\n\n  return AudioTrack;\n}(Track);\n\n/**\n * A representation of a single `VideoTrack`.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#videotrack}\n * @extends Track\n */\n\nvar VideoTrack = /*#__PURE__*/function (_Track) {\n  _inheritsLoose(VideoTrack, _Track);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} [options={}]\n   *        Object of option names and values\n   *\n   * @param {string} [options.kind='']\n   *        A valid {@link VideoTrack~Kind}\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this AudioTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {boolean} [options.selected]\n   *        If this track is the one that is currently playing.\n   */\n  function VideoTrack(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var settings = mergeOptions$3(options, {\n      kind: VideoTrackKind[options.kind] || ''\n    });\n    _this = _Track.call(this, settings) || this;\n    var selected = false;\n    /**\n     * @memberof VideoTrack\n     * @member {boolean} selected\n     *         If this `VideoTrack` is selected or not. When setting this will\n     *         fire {@link VideoTrack#selectedchange} if the state of selected changed.\n     * @instance\n     *\n     * @fires VideoTrack#selectedchange\n     */\n\n    Object.defineProperty(_assertThisInitialized(_this), 'selected', {\n      get: function get() {\n        return selected;\n      },\n      set: function set(newSelected) {\n        // an invalid or unchanged value\n        if (typeof newSelected !== 'boolean' || newSelected === selected) {\n          return;\n        }\n\n        selected = newSelected;\n        /**\n         * An event that fires when selected changes on this track. This allows\n         * the VideoTrackList that holds this track to act accordingly.\n         *\n         * > Note: This is not part of the spec! Native tracks will do\n         *         this internally without an event.\n         *\n         * @event VideoTrack#selectedchange\n         * @type {EventTarget~Event}\n         */\n\n        this.trigger('selectedchange');\n      }\n    }); // if the user sets this track to selected then\n    // set selected to that true value otherwise\n    // we keep it false\n\n    if (settings.selected) {\n      _this.selected = settings.selected;\n    }\n\n    return _this;\n  }\n\n  return VideoTrack;\n}(Track);\n\n/**\n * @memberof HTMLTrackElement\n * @typedef {HTMLTrackElement~ReadyState}\n * @enum {number}\n */\n\nvar NONE = 0;\nvar LOADING = 1;\nvar LOADED = 2;\nvar ERROR = 3;\n/**\n * A single track represented in the DOM.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#htmltrackelement}\n * @extends EventTarget\n */\n\nvar HTMLTrackElement = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(HTMLTrackElement, _EventTarget);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Object} options={}\n   *        Object of option names and values\n   *\n   * @param {Tech} options.tech\n   *        A reference to the tech that owns this HTMLTrackElement.\n   *\n   * @param {TextTrack~Kind} [options.kind='subtitles']\n   *        A valid text track kind.\n   *\n   * @param {TextTrack~Mode} [options.mode='disabled']\n   *        A valid text track mode.\n   *\n   * @param {string} [options.id='vjs_track_' + Guid.newGUID()]\n   *        A unique id for this TextTrack.\n   *\n   * @param {string} [options.label='']\n   *        The menu label for this track.\n   *\n   * @param {string} [options.language='']\n   *        A valid two character language code.\n   *\n   * @param {string} [options.srclang='']\n   *        A valid two character language code. An alternative, but deprioritized\n   *        version of `options.language`\n   *\n   * @param {string} [options.src]\n   *        A url to TextTrack cues.\n   *\n   * @param {boolean} [options.default]\n   *        If this track should default to on or off.\n   */\n  function HTMLTrackElement(options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    var readyState;\n    var track = new TextTrack(options);\n    _this.kind = track.kind;\n    _this.src = track.src;\n    _this.srclang = track.language;\n    _this.label = track.label;\n    _this[\"default\"] = track[\"default\"];\n    Object.defineProperties(_assertThisInitialized(_this), {\n      /**\n       * @memberof HTMLTrackElement\n       * @member {HTMLTrackElement~ReadyState} readyState\n       *         The current ready state of the track element.\n       * @instance\n       */\n      readyState: {\n        get: function get() {\n          return readyState;\n        }\n      },\n\n      /**\n       * @memberof HTMLTrackElement\n       * @member {TextTrack} track\n       *         The underlying TextTrack object.\n       * @instance\n       *\n       */\n      track: {\n        get: function get() {\n          return track;\n        }\n      }\n    });\n    readyState = NONE;\n    /**\n     * @listens TextTrack#loadeddata\n     * @fires HTMLTrackElement#load\n     */\n\n    track.addEventListener('loadeddata', function () {\n      readyState = LOADED;\n\n      _this.trigger({\n        type: 'load',\n        target: _assertThisInitialized(_this)\n      });\n    });\n    return _this;\n  }\n\n  return HTMLTrackElement;\n}(EventTarget$2);\n\nHTMLTrackElement.prototype.allowedEvents_ = {\n  load: 'load'\n};\nHTMLTrackElement.NONE = NONE;\nHTMLTrackElement.LOADING = LOADING;\nHTMLTrackElement.LOADED = LOADED;\nHTMLTrackElement.ERROR = ERROR;\n\n/*\n * This file contains all track properties that are used in\n * player.js, tech.js, html5.js and possibly other techs in the future.\n */\n\nvar NORMAL = {\n  audio: {\n    ListClass: AudioTrackList,\n    TrackClass: AudioTrack,\n    capitalName: 'Audio'\n  },\n  video: {\n    ListClass: VideoTrackList,\n    TrackClass: VideoTrack,\n    capitalName: 'Video'\n  },\n  text: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'Text'\n  }\n};\nObject.keys(NORMAL).forEach(function (type) {\n  NORMAL[type].getterName = type + \"Tracks\";\n  NORMAL[type].privateName = type + \"Tracks_\";\n});\nvar REMOTE = {\n  remoteText: {\n    ListClass: TextTrackList,\n    TrackClass: TextTrack,\n    capitalName: 'RemoteText',\n    getterName: 'remoteTextTracks',\n    privateName: 'remoteTextTracks_'\n  },\n  remoteTextEl: {\n    ListClass: HtmlTrackElementList,\n    TrackClass: HTMLTrackElement,\n    capitalName: 'RemoteTextTrackEls',\n    getterName: 'remoteTextTrackEls',\n    privateName: 'remoteTextTrackEls_'\n  }\n};\n\nvar ALL = _extends({}, NORMAL, REMOTE);\n\nREMOTE.names = Object.keys(REMOTE);\nNORMAL.names = Object.keys(NORMAL);\nALL.names = [].concat(REMOTE.names).concat(NORMAL.names);\n\n/**\n * An Object containing a structure like: `{src: 'url', type: 'mimetype'}` or string\n * that just contains the src url alone.\n * * `var SourceObject = {src: 'http://ex.com/video.mp4', type: 'video/mp4'};`\n   * `var SourceString = 'http://example.com/some-video.mp4';`\n *\n * @typedef {Object|string} Tech~SourceObject\n *\n * @property {string} src\n *           The url to the source\n *\n * @property {string} type\n *           The mime type of the source\n */\n\n/**\n * A function used by {@link Tech} to create a new {@link TextTrack}.\n *\n * @private\n *\n * @param {Tech} self\n *        An instance of the Tech class.\n *\n * @param {string} kind\n *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n *\n * @param {string} [label]\n *        Label to identify the text track\n *\n * @param {string} [language]\n *        Two letter language abbreviation\n *\n * @param {Object} [options={}]\n *        An object with additional text track options\n *\n * @return {TextTrack}\n *          The text track that was created.\n */\n\nfunction createTrackHelper(self, kind, label, language, options) {\n  if (options === void 0) {\n    options = {};\n  }\n\n  var tracks = self.textTracks();\n  options.kind = kind;\n\n  if (label) {\n    options.label = label;\n  }\n\n  if (language) {\n    options.language = language;\n  }\n\n  options.tech = self;\n  var track = new ALL.text.TrackClass(options);\n  tracks.addTrack(track);\n  return track;\n}\n/**\n * This is the base class for media playback technology controllers, such as\n * {@link HTML5}\n *\n * @extends Component\n */\n\n\nvar Tech = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Tech, _Component);\n\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n  function Tech(options, ready) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (ready === void 0) {\n      ready = function ready() {};\n    }\n\n    // we don't want the tech to report user activity automatically.\n    // This is done manually in addControlsListeners\n    options.reportTouchActivity = false;\n    _this = _Component.call(this, null, options, ready) || this;\n\n    _this.onDurationChange_ = function (e) {\n      return _this.onDurationChange(e);\n    };\n\n    _this.trackProgress_ = function (e) {\n      return _this.trackProgress(e);\n    };\n\n    _this.trackCurrentTime_ = function (e) {\n      return _this.trackCurrentTime(e);\n    };\n\n    _this.stopTrackingCurrentTime_ = function (e) {\n      return _this.stopTrackingCurrentTime(e);\n    };\n\n    _this.disposeSourceHandler_ = function (e) {\n      return _this.disposeSourceHandler(e);\n    };\n\n    _this.queuedHanders_ = new Set(); // keep track of whether the current source has played at all to\n    // implement a very limited played()\n\n    _this.hasStarted_ = false;\n\n    _this.on('playing', function () {\n      this.hasStarted_ = true;\n    });\n\n    _this.on('loadstart', function () {\n      this.hasStarted_ = false;\n    });\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      if (options && options[props.getterName]) {\n        _this[props.privateName] = options[props.getterName];\n      }\n    }); // Manually track progress in cases where the browser/tech doesn't report it.\n\n    if (!_this.featuresProgressEvents) {\n      _this.manualProgressOn();\n    } // Manually track timeupdates in cases where the browser/tech doesn't report it.\n\n\n    if (!_this.featuresTimeupdateEvents) {\n      _this.manualTimeUpdatesOn();\n    }\n\n    ['Text', 'Audio', 'Video'].forEach(function (track) {\n      if (options[\"native\" + track + \"Tracks\"] === false) {\n        _this[\"featuresNative\" + track + \"Tracks\"] = false;\n      }\n    });\n\n    if (options.nativeCaptions === false || options.nativeTextTracks === false) {\n      _this.featuresNativeTextTracks = false;\n    } else if (options.nativeCaptions === true || options.nativeTextTracks === true) {\n      _this.featuresNativeTextTracks = true;\n    }\n\n    if (!_this.featuresNativeTextTracks) {\n      _this.emulateTextTracks();\n    }\n\n    _this.preloadTextTracks = options.preloadTextTracks !== false;\n    _this.autoRemoteTextTracks_ = new ALL.text.ListClass();\n\n    _this.initTrackListeners(); // Turn on component tap events only if not using native controls\n\n\n    if (!options.nativeControlsForTouch) {\n      _this.emitTapEvents();\n    }\n\n    if (_this.constructor) {\n      _this.name_ = _this.constructor.name || 'Unknown Tech';\n    }\n\n    return _this;\n  }\n  /**\n   * A special function to trigger source set in a way that will allow player\n   * to re-trigger if the player or tech are not ready yet.\n   *\n   * @fires Tech#sourceset\n   * @param {string} src The source string at the time of the source changing.\n   */\n\n\n  var _proto = Tech.prototype;\n\n  _proto.triggerSourceset = function triggerSourceset(src) {\n    var _this2 = this;\n\n    if (!this.isReady_) {\n      // on initial ready we have to trigger source set\n      // 1ms after ready so that player can watch for it.\n      this.one('ready', function () {\n        return _this2.setTimeout(function () {\n          return _this2.triggerSourceset(src);\n        }, 1);\n      });\n    }\n    /**\n     * Fired when the source is set on the tech causing the media element\n     * to reload.\n     *\n     * @see {@link Player#event:sourceset}\n     * @event Tech#sourceset\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger({\n      src: src,\n      type: 'sourceset'\n    });\n  }\n  /* Fallbacks for unsupported event types\n  ================================================================================ */\n\n  /**\n   * Polyfill the `progress` event for browsers that don't support it natively.\n   *\n   * @see {@link Tech#trackProgress}\n   */\n  ;\n\n  _proto.manualProgressOn = function manualProgressOn() {\n    this.on('durationchange', this.onDurationChange_);\n    this.manualProgress = true; // Trigger progress watching when a source begins loading\n\n    this.one('ready', this.trackProgress_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   */\n  ;\n\n  _proto.manualProgressOff = function manualProgressOff() {\n    this.manualProgress = false;\n    this.stopTrackingProgress();\n    this.off('durationchange', this.onDurationChange_);\n  }\n  /**\n   * This is used to trigger a `progress` event when the buffered percent changes. It\n   * sets an interval function that will be called every 500 milliseconds to check if the\n   * buffer end percent has changed.\n   *\n   * > This function is called by {@link Tech#manualProgressOn}\n   *\n   * @param {EventTarget~Event} event\n   *        The `ready` event that caused this to run.\n   *\n   * @listens Tech#ready\n   * @fires Tech#progress\n   */\n  ;\n\n  _proto.trackProgress = function trackProgress(event) {\n    this.stopTrackingProgress();\n    this.progressInterval = this.setInterval(bind(this, function () {\n      // Don't trigger unless buffered amount is greater than last time\n      var numBufferedPercent = this.bufferedPercent();\n\n      if (this.bufferedPercent_ !== numBufferedPercent) {\n        /**\n         * See {@link Player#progress}\n         *\n         * @event Tech#progress\n         * @type {EventTarget~Event}\n         */\n        this.trigger('progress');\n      }\n\n      this.bufferedPercent_ = numBufferedPercent;\n\n      if (numBufferedPercent === 1) {\n        this.stopTrackingProgress();\n      }\n    }), 500);\n  }\n  /**\n   * Update our internal duration on a `durationchange` event by calling\n   * {@link Tech#duration}.\n   *\n   * @param {EventTarget~Event} event\n   *        The `durationchange` event that caused this to run.\n   *\n   * @listens Tech#durationchange\n   */\n  ;\n\n  _proto.onDurationChange = function onDurationChange(event) {\n    this.duration_ = this.duration();\n  }\n  /**\n   * Get and create a `TimeRange` object for buffering.\n   *\n   * @return {TimeRange}\n   *         The time range object that was created.\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    return createTimeRanges(0, 0);\n  }\n  /**\n   * Get the percentage of the current video that is currently buffered.\n   *\n   * @return {number}\n   *         A number from 0 to 1 that represents the decimal percentage of the\n   *         video that is buffered.\n   *\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration_);\n  }\n  /**\n   * Turn off the polyfill for `progress` events that was created in\n   * {@link Tech#manualProgressOn}\n   * Stop manually tracking progress events by clearing the interval that was set in\n   * {@link Tech#trackProgress}.\n   */\n  ;\n\n  _proto.stopTrackingProgress = function stopTrackingProgress() {\n    this.clearInterval(this.progressInterval);\n  }\n  /**\n   * Polyfill the `timeupdate` event for browsers that don't support it.\n   *\n   * @see {@link Tech#trackCurrentTime}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOn = function manualTimeUpdatesOn() {\n    this.manualTimeUpdates = true;\n    this.on('play', this.trackCurrentTime_);\n    this.on('pause', this.stopTrackingCurrentTime_);\n  }\n  /**\n   * Turn off the polyfill for `timeupdate` events that was created in\n   * {@link Tech#manualTimeUpdatesOn}\n   */\n  ;\n\n  _proto.manualTimeUpdatesOff = function manualTimeUpdatesOff() {\n    this.manualTimeUpdates = false;\n    this.stopTrackingCurrentTime();\n    this.off('play', this.trackCurrentTime_);\n    this.off('pause', this.stopTrackingCurrentTime_);\n  }\n  /**\n   * Sets up an interval function to track current time and trigger `timeupdate` every\n   * 250 milliseconds.\n   *\n   * @listens Tech#play\n   * @triggers Tech#timeupdate\n   */\n  ;\n\n  _proto.trackCurrentTime = function trackCurrentTime() {\n    if (this.currentTimeInterval) {\n      this.stopTrackingCurrentTime();\n    }\n\n    this.currentTimeInterval = this.setInterval(function () {\n      /**\n       * Triggered at an interval of 250ms to indicated that time is passing in the video.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      }); // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n    }, 250);\n  }\n  /**\n   * Stop the interval function created in {@link Tech#trackCurrentTime} so that the\n   * `timeupdate` event is no longer triggered.\n   *\n   * @listens {Tech#pause}\n   */\n  ;\n\n  _proto.stopTrackingCurrentTime = function stopTrackingCurrentTime() {\n    this.clearInterval(this.currentTimeInterval); // #1002 - if the video ends right before the next timeupdate would happen,\n    // the progress bar won't make it all the way to the end\n\n    this.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n  }\n  /**\n   * Turn off all event polyfills, clear the `Tech`s {@link AudioTrackList},\n   * {@link VideoTrackList}, and {@link TextTrackList}, and dispose of this Tech.\n   *\n   * @fires Component#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    // clear out all tracks because we can't reuse them between techs\n    this.clearTracks(NORMAL.names); // Turn off any manual progress or timeupdate tracking\n\n    if (this.manualProgress) {\n      this.manualProgressOff();\n    }\n\n    if (this.manualTimeUpdates) {\n      this.manualTimeUpdatesOff();\n    }\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Clear out a single `TrackList` or an array of `TrackLists` given their names.\n   *\n   * > Note: Techs without source handlers should call this between sources for `video`\n   *         & `audio` tracks. You don't want to use them between tracks!\n   *\n   * @param {string[]|string} types\n   *        TrackList names to clear, valid names are `video`, `audio`, and\n   *        `text`.\n   */\n  ;\n\n  _proto.clearTracks = function clearTracks(types) {\n    var _this3 = this;\n\n    types = [].concat(types); // clear out all tracks because we can't reuse them between techs\n\n    types.forEach(function (type) {\n      var list = _this3[type + \"Tracks\"]() || [];\n      var i = list.length;\n\n      while (i--) {\n        var track = list[i];\n\n        if (type === 'text') {\n          _this3.removeRemoteTextTrack(track);\n        }\n\n        list.removeTrack(track);\n      }\n    });\n  }\n  /**\n   * Remove any TextTracks added via addRemoteTextTrack that are\n   * flagged for automatic garbage collection\n   */\n  ;\n\n  _proto.cleanupAutoTextTracks = function cleanupAutoTextTracks() {\n    var list = this.autoRemoteTextTracks_ || [];\n    var i = list.length;\n\n    while (i--) {\n      var track = list[i];\n      this.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Reset the tech, which will removes all sources and reset the internal readyState.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.reset = function reset() {}\n  /**\n   * Get the value of `crossOrigin` from the tech.\n   *\n   * @abstract\n   *\n   * @see {Html5#crossOrigin}\n   */\n  ;\n\n  _proto.crossOrigin = function crossOrigin() {}\n  /**\n   * Set the value of `crossOrigin` on the tech.\n   *\n   * @abstract\n   *\n   * @param {string} crossOrigin the crossOrigin value\n   * @see {Html5#setCrossOrigin}\n   */\n  ;\n\n  _proto.setCrossOrigin = function setCrossOrigin() {}\n  /**\n   * Get or set an error on the Tech.\n   *\n   * @param {MediaError} [err]\n   *        Error to set on the Tech\n   *\n   * @return {MediaError|null}\n   *         The current error object on the tech, or null if there isn't one.\n   */\n  ;\n\n  _proto.error = function error(err) {\n    if (err !== undefined) {\n      this.error_ = new MediaError(err);\n      this.trigger('error');\n    }\n\n    return this.error_;\n  }\n  /**\n   * Returns the `TimeRange`s that have been played through for the current source.\n   *\n   * > NOTE: This implementation is incomplete. It does not track the played `TimeRange`.\n   *         It only checks whether the source has played at all or not.\n   *\n   * @return {TimeRange}\n   *         - A single time range if this video has played\n   *         - An empty set of ranges if not.\n   */\n  ;\n\n  _proto.played = function played() {\n    if (this.hasStarted_) {\n      return createTimeRanges(0, 0);\n    }\n\n    return createTimeRanges();\n  }\n  /**\n   * Start playback\n   *\n   * @abstract\n   *\n   * @see {Html5#play}\n   */\n  ;\n\n  _proto.play = function play() {}\n  /**\n   * Set whether we are scrubbing or not\n   *\n   * @abstract\n   *\n   * @see {Html5#setScrubbing}\n   */\n  ;\n\n  _proto.setScrubbing = function setScrubbing() {}\n  /**\n   * Get whether we are scrubbing or not\n   *\n   * @abstract\n   *\n   * @see {Html5#scrubbing}\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing() {}\n  /**\n   * Causes a manual time update to occur if {@link Tech#manualTimeUpdatesOn} was\n   * previously called.\n   *\n   * @fires Tech#timeupdate\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime() {\n    // improve the accuracy of manual timeupdates\n    if (this.manualTimeUpdates) {\n      /**\n       * A manual `timeupdate` event.\n       *\n       * @event Tech#timeupdate\n       * @type {EventTarget~Event}\n       */\n      this.trigger({\n        type: 'timeupdate',\n        target: this,\n        manuallyTriggered: true\n      });\n    }\n  }\n  /**\n   * Turn on listeners for {@link VideoTrackList}, {@link {AudioTrackList}, and\n   * {@link TextTrackList} events.\n   *\n   * This adds {@link EventTarget~EventListeners} for `addtrack`, and  `removetrack`.\n   *\n   * @fires Tech#audiotrackchange\n   * @fires Tech#videotrackchange\n   * @fires Tech#texttrackchange\n   */\n  ;\n\n  _proto.initTrackListeners = function initTrackListeners() {\n    var _this4 = this;\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link AudioTrackList}\n      *\n      * @event Tech#audiotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link VideoTrackList}\n      *\n      * @event Tech#videotrackchange\n      * @type {EventTarget~Event}\n      */\n\n    /**\n      * Triggered when tracks are added or removed on the Tech {@link TextTrackList}\n      *\n      * @event Tech#texttrackchange\n      * @type {EventTarget~Event}\n      */\n    NORMAL.names.forEach(function (name) {\n      var props = NORMAL[name];\n\n      var trackListChanges = function trackListChanges() {\n        _this4.trigger(name + \"trackchange\");\n      };\n\n      var tracks = _this4[props.getterName]();\n\n      tracks.addEventListener('removetrack', trackListChanges);\n      tracks.addEventListener('addtrack', trackListChanges);\n\n      _this4.on('dispose', function () {\n        tracks.removeEventListener('removetrack', trackListChanges);\n        tracks.removeEventListener('addtrack', trackListChanges);\n      });\n    });\n  }\n  /**\n   * Emulate TextTracks using vtt.js if necessary\n   *\n   * @fires Tech#vttjsloaded\n   * @fires Tech#vttjserror\n   */\n  ;\n\n  _proto.addWebVttScript_ = function addWebVttScript_() {\n    var _this5 = this;\n\n    if (window$1.WebVTT) {\n      return;\n    } // Initially, Tech.el_ is a child of a dummy-div wait until the Component system\n    // signals that the Tech is ready at which point Tech.el_ is part of the DOM\n    // before inserting the WebVTT script\n\n\n    if (document.body.contains(this.el())) {\n      // load via require if available and vtt.js script location was not passed in\n      // as an option. novtt builds will turn the above require call into an empty object\n      // which will cause this if check to always fail.\n      if (!this.options_['vtt.js'] && isPlain(vtt) && Object.keys(vtt).length > 0) {\n        this.trigger('vttjsloaded');\n        return;\n      } // load vtt.js via the script location option or the cdn of no location was\n      // passed in\n\n\n      var script = document.createElement('script');\n      script.src = this.options_['vtt.js'] || 'https://vjs.zencdn.net/vttjs/0.14.1/vtt.min.js';\n\n      script.onload = function () {\n        /**\n         * Fired when vtt.js is loaded.\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjsloaded');\n      };\n\n      script.onerror = function () {\n        /**\n         * Fired when vtt.js was not loaded due to an error\n         *\n         * @event Tech#vttjsloaded\n         * @type {EventTarget~Event}\n         */\n        _this5.trigger('vttjserror');\n      };\n\n      this.on('dispose', function () {\n        script.onload = null;\n        script.onerror = null;\n      }); // but have not loaded yet and we set it to true before the inject so that\n      // we don't overwrite the injected window.WebVTT if it loads right away\n\n      window$1.WebVTT = true;\n      this.el().parentNode.appendChild(script);\n    } else {\n      this.ready(this.addWebVttScript_);\n    }\n  }\n  /**\n   * Emulate texttracks\n   *\n   */\n  ;\n\n  _proto.emulateTextTracks = function emulateTextTracks() {\n    var _this6 = this;\n\n    var tracks = this.textTracks();\n    var remoteTracks = this.remoteTextTracks();\n\n    var handleAddTrack = function handleAddTrack(e) {\n      return tracks.addTrack(e.track);\n    };\n\n    var handleRemoveTrack = function handleRemoveTrack(e) {\n      return tracks.removeTrack(e.track);\n    };\n\n    remoteTracks.on('addtrack', handleAddTrack);\n    remoteTracks.on('removetrack', handleRemoveTrack);\n    this.addWebVttScript_();\n\n    var updateDisplay = function updateDisplay() {\n      return _this6.trigger('texttrackchange');\n    };\n\n    var textTracksChanges = function textTracksChanges() {\n      updateDisplay();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n\n        if (track.mode === 'showing') {\n          track.addEventListener('cuechange', updateDisplay);\n        }\n      }\n    };\n\n    textTracksChanges();\n    tracks.addEventListener('change', textTracksChanges);\n    tracks.addEventListener('addtrack', textTracksChanges);\n    tracks.addEventListener('removetrack', textTracksChanges);\n    this.on('dispose', function () {\n      remoteTracks.off('addtrack', handleAddTrack);\n      remoteTracks.off('removetrack', handleRemoveTrack);\n      tracks.removeEventListener('change', textTracksChanges);\n      tracks.removeEventListener('addtrack', textTracksChanges);\n      tracks.removeEventListener('removetrack', textTracksChanges);\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i];\n        track.removeEventListener('cuechange', updateDisplay);\n      }\n    });\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!kind) {\n      throw new Error('TextTrack kind is required but was not provided');\n    }\n\n    return createTrackHelper(this, kind, label, language);\n  }\n  /**\n   * Create an emulated TextTrack for use by addRemoteTextTrack\n   *\n   * This is intended to be overridden by classes that inherit from\n   * Tech in order to create native or custom TextTracks.\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label].\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    var track = mergeOptions$3(options, {\n      tech: this\n    });\n    return new REMOTE.remoteTextEl.TrackClass(track);\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * > Note: This can be an emulated {@link HTMLTrackElement} or a native one.\n   *\n   * @param {Object} options\n   *        See {@link Tech#createRemoteTextTrack} for more detailed properties.\n   *\n   * @param {boolean} [manualCleanup=true]\n   *        - When false: the TextTrack will be automatically removed from the video\n   *          element whenever the source changes\n   *        - When True: The TextTrack will have to be cleaned up manually\n   *\n   * @return {HTMLTrackElement}\n   *         An Html Track Element.\n   *\n   * @deprecated The default functionality for this function will be equivalent\n   *             to \"manualCleanup=false\" in the future. The manualCleanup parameter will\n   *             also be removed.\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var _this7 = this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    var htmlTrackElement = this.createRemoteTextTrack(options);\n\n    if (manualCleanup !== true && manualCleanup !== false) {\n      // deprecation warning\n      log$1.warn('Calling addRemoteTextTrack without explicitly setting the \"manualCleanup\" parameter to `true` is deprecated and default to `false` in future version of video.js');\n      manualCleanup = true;\n    } // store HTMLTrackElement and TextTrack to remote list\n\n\n    this.remoteTextTrackEls().addTrackElement_(htmlTrackElement);\n    this.remoteTextTracks().addTrack(htmlTrackElement.track);\n\n    if (manualCleanup !== true) {\n      // create the TextTrackList if it doesn't exist\n      this.ready(function () {\n        return _this7.autoRemoteTextTracks_.addTrack(htmlTrackElement.track);\n      });\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove a remote text track from the remote `TextTrackList`.\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` to remove from the `TextTrackList`\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    var trackElement = this.remoteTextTrackEls().getTrackElementByTrack_(track); // remove HTMLTrackElement and TextTrack from remote list\n\n    this.remoteTextTrackEls().removeTrackElement_(trackElement);\n    this.remoteTextTracks().removeTrack(track);\n    this.autoRemoteTextTracks_.removeTrack(track);\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return {};\n  }\n  /**\n   * Attempt to create a floating video window always on top of other windows\n   * so that users may continue consuming media while they interact with other\n   * content sites, or applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise|undefined}\n   *         A promise with a Picture-in-Picture window if the browser supports\n   *         Promises (or one was passed in as an option). It returns undefined\n   *         otherwise.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return PromiseClass.reject();\n    }\n  }\n  /**\n   * A method to check for the value of the 'disablePictureInPicture' <video> property.\n   * Defaults to true, as it should be considered disabled if the tech does not support pip\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.disablePictureInPicture = function disablePictureInPicture() {\n    return true;\n  }\n  /**\n   * A method to set or unset the 'disablePictureInPicture' <video> property.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setDisablePictureInPicture = function setDisablePictureInPicture() {}\n  /**\n   * A fallback implementation of requestVideoFrameCallback using requestAnimationFrame\n   *\n   * @param {function} cb\n   * @return {number} request id\n   */\n  ;\n\n  _proto.requestVideoFrameCallback = function requestVideoFrameCallback(cb) {\n    var _this8 = this;\n\n    var id = newGUID();\n\n    if (!this.isReady_ || this.paused()) {\n      this.queuedHanders_.add(id);\n      this.one('playing', function () {\n        if (_this8.queuedHanders_.has(id)) {\n          _this8.queuedHanders_[\"delete\"](id);\n\n          cb();\n        }\n      });\n    } else {\n      this.requestNamedAnimationFrame(id, cb);\n    }\n\n    return id;\n  }\n  /**\n   * A fallback implementation of cancelVideoFrameCallback\n   *\n   * @param {number} id id of callback to be cancelled\n   */\n  ;\n\n  _proto.cancelVideoFrameCallback = function cancelVideoFrameCallback(id) {\n    if (this.queuedHanders_.has(id)) {\n      this.queuedHanders_[\"delete\"](id);\n    } else {\n      this.cancelNamedAnimationFrame(id);\n    }\n  }\n  /**\n   * A method to set a poster from a `Tech`.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPoster = function setPoster() {}\n  /**\n   * A method to check for the presence of the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.playsinline = function playsinline() {}\n  /**\n   * A method to set or unset the 'playsinline' <video> attribute.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.setPlaysinline = function setPlaysinline() {}\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks() {}\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks() {}\n  /*\n   * Check if the tech can support the given mime-type.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param  {string} type\n   *         The mimetype to check for support\n   *\n   * @return {string}\n   *         'probably', 'maybe', or empty string\n   *\n   * @see [Spec]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/canPlayType}\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the type is supported by this tech.\n   *\n   * The base tech does not support any type, but source handlers might\n   * overwrite this.\n   *\n   * @param {string} type\n   *        The media type to check\n   * @return {string} Returns the native video element's response\n   */\n  ;\n\n  Tech.canPlayType = function canPlayType() {\n    return '';\n  }\n  /**\n   * Check if the tech can support the given source\n   *\n   * @param {Object} srcObj\n   *        The source object\n   * @param {Object} options\n   *        The options passed to the tech\n   * @return {string} 'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  Tech.canPlaySource = function canPlaySource(srcObj, options) {\n    return Tech.canPlayType(srcObj.type);\n  }\n  /*\n   * Return whether the argument is a Tech or not.\n   * Can be passed either a Class like `Html5` or a instance like `player.tech_`\n   *\n   * @param {Object} component\n   *        The item to check\n   *\n   * @return {boolean}\n   *         Whether it is a tech or not\n   *         - True if it is a tech\n   *         - False if it is not\n   */\n  ;\n\n  Tech.isTech = function isTech(component) {\n    return component.prototype instanceof Tech || component instanceof Tech || component === Tech;\n  }\n  /**\n   * Registers a `Tech` into a shared list for videojs.\n   *\n   * @param {string} name\n   *        Name of the `Tech` to register.\n   *\n   * @param {Object} tech\n   *        The `Tech` class to register.\n   */\n  ;\n\n  Tech.registerTech = function registerTech(name, tech) {\n    if (!Tech.techs_) {\n      Tech.techs_ = {};\n    }\n\n    if (!Tech.isTech(tech)) {\n      throw new Error(\"Tech \" + name + \" must be a Tech\");\n    }\n\n    if (!Tech.canPlayType) {\n      throw new Error('Techs must have a static canPlayType method on them');\n    }\n\n    if (!Tech.canPlaySource) {\n      throw new Error('Techs must have a static canPlaySource method on them');\n    }\n\n    name = toTitleCase$1(name);\n    Tech.techs_[name] = tech;\n    Tech.techs_[toLowerCase(name)] = tech;\n\n    if (name !== 'Tech') {\n      // camel case the techName for use in techOrder\n      Tech.defaultTechOrder_.push(name);\n    }\n\n    return tech;\n  }\n  /**\n   * Get a `Tech` from the shared list by name.\n   *\n   * @param {string} name\n   *        `camelCase` or `TitleCase` name of the Tech to get\n   *\n   * @return {Tech|undefined}\n   *         The `Tech` or undefined if there was no tech with the name requested.\n   */\n  ;\n\n  Tech.getTech = function getTech(name) {\n    if (!name) {\n      return;\n    }\n\n    if (Tech.techs_ && Tech.techs_[name]) {\n      return Tech.techs_[name];\n    }\n\n    name = toTitleCase$1(name);\n\n    if (window$1 && window$1.videojs && window$1.videojs[name]) {\n      log$1.warn(\"The \" + name + \" tech was added to the videojs object when it should be registered using videojs.registerTech(name, tech)\");\n      return window$1.videojs[name];\n    }\n  };\n\n  return Tech;\n}(Component$1);\n/**\n * Get the {@link VideoTrackList}\n *\n * @returns {VideoTrackList}\n * @method Tech.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n *\n * @returns {AudioTrackList}\n * @method Tech.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.textTracks\n */\n\n/**\n * Get the remote element {@link TextTrackList}\n *\n * @returns {TextTrackList}\n * @method Tech.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote element {@link HtmlTrackElementList}\n *\n * @returns {HtmlTrackElementList}\n * @method Tech.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Tech.prototype[props.getterName] = function () {\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * List of associated text tracks\n *\n * @type {TextTrackList}\n * @private\n * @property Tech#textTracks_\n */\n\n/**\n * List of associated audio tracks.\n *\n * @type {AudioTrackList}\n * @private\n * @property Tech#audioTracks_\n */\n\n/**\n * List of associated video tracks.\n *\n * @type {VideoTrackList}\n * @private\n * @property Tech#videoTracks_\n */\n\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresVolumeControl = true;\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default\n */\n\nTech.prototype.featuresMuteControl = true;\n/**\n * Boolean indicating whether the `Tech` supports fullscreen resize control.\n * Resizing plugins using request fullscreen reloads the plugin\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresFullscreenResize = false;\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the video\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresPlaybackRate = false;\n/**\n * Boolean indicating whether the `Tech` supports the `progress` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualProgressOn} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresProgressEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * A tech should set this to `true` and then use {@link Tech#triggerSourceset}\n * to trigger a {@link Tech#event:sourceset} at the earliest time after getting\n * a new source.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresSourceset = false;\n/**\n * Boolean indicating whether the `Tech` supports the `timeupdate` event. This is currently\n * not triggered by video-js-swf. This will be used to determine if\n * {@link Tech#manualTimeUpdates} should be called.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresTimeupdateEvents = false;\n/**\n * Boolean indicating whether the `Tech` supports the native `TextTrack`s.\n * This will help us integrate with native `TextTrack`s if the browser supports them.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresNativeTextTracks = false;\n/**\n * Boolean indicating whether the `Tech` supports `requestVideoFrameCallback`.\n *\n * @type {boolean}\n * @default\n */\n\nTech.prototype.featuresVideoFrameCallback = false;\n/**\n * A functional mixin for techs that want to use the Source Handler pattern.\n * Source handlers are scripts for handling specific formats.\n * The source handler pattern is used for adaptive formats (HLS, DASH) that\n * manually load video data and feed it into a Source Buffer (Media Source Extensions)\n * Example: `Tech.withSourceHandlers.call(MyTech);`\n *\n * @param {Tech} _Tech\n *        The tech to add source handler functions to.\n *\n * @mixes Tech~SourceHandlerAdditions\n */\n\nTech.withSourceHandlers = function (_Tech) {\n  /**\n   * Register a source handler\n   *\n   * @param {Function} handler\n   *        The source handler class\n   *\n   * @param {number} [index]\n   *        Register it at the following index\n   */\n  _Tech.registerSourceHandler = function (handler, index) {\n    var handlers = _Tech.sourceHandlers;\n\n    if (!handlers) {\n      handlers = _Tech.sourceHandlers = [];\n    }\n\n    if (index === undefined) {\n      // add to the end of the list\n      index = handlers.length;\n    }\n\n    handlers.splice(index, 0, handler);\n  };\n  /**\n   * Check if the tech can support the given type. Also checks the\n   * Techs sourceHandlers.\n   *\n   * @param {string} type\n   *         The mimetype to check.\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlayType = function (type) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canPlayType(type);\n\n      if (can) {\n        return can;\n      }\n    }\n\n    return '';\n  };\n  /**\n   * Returns the first source handler that supports the source.\n   *\n   * TODO: Answer question: should 'probably' be prioritized over 'maybe'\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {SourceHandler|null}\n   *          The first source handler that supports the source or null if\n   *          no SourceHandler supports the source\n   */\n\n\n  _Tech.selectSourceHandler = function (source, options) {\n    var handlers = _Tech.sourceHandlers || [];\n    var can;\n\n    for (var i = 0; i < handlers.length; i++) {\n      can = handlers[i].canHandleSource(source, options);\n\n      if (can) {\n        return handlers[i];\n      }\n    }\n\n    return null;\n  };\n  /**\n   * Check if the tech can support the given source.\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        The source object\n   *\n   * @param {Object} options\n   *        The options passed to the tech\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n\n\n  _Tech.canPlaySource = function (srcObj, options) {\n    var sh = _Tech.selectSourceHandler(srcObj, options);\n\n    if (sh) {\n      return sh.canHandleSource(srcObj, options);\n    }\n\n    return '';\n  };\n  /**\n   * When using a source handler, prefer its implementation of\n   * any function normally provided by the tech.\n   */\n\n\n  var deferrable = ['seekable', 'seeking', 'duration'];\n  /**\n   * A wrapper around {@link Tech#seekable} that will call a `SourceHandler`s seekable\n   * function if it exists, with a fallback to the Techs seekable function.\n   *\n   * @method _Tech.seekable\n   */\n\n  /**\n   * A wrapper around {@link Tech#duration} that will call a `SourceHandler`s duration\n   * function if it exists, otherwise it will fallback to the techs duration function.\n   *\n   * @method _Tech.duration\n   */\n\n  deferrable.forEach(function (fnName) {\n    var originalFn = this[fnName];\n\n    if (typeof originalFn !== 'function') {\n      return;\n    }\n\n    this[fnName] = function () {\n      if (this.sourceHandler_ && this.sourceHandler_[fnName]) {\n        return this.sourceHandler_[fnName].apply(this.sourceHandler_, arguments);\n      }\n\n      return originalFn.apply(this, arguments);\n    };\n  }, _Tech.prototype);\n  /**\n   * Create a function for setting the source using a source object\n   * and source handlers.\n   * Should never be called unless a source handler was found.\n   *\n   * @param {Tech~SourceObject} source\n   *        A source object with src and type keys\n   */\n\n  _Tech.prototype.setSource = function (source) {\n    var sh = _Tech.selectSourceHandler(source, this.options_);\n\n    if (!sh) {\n      // Fall back to a native source hander when unsupported sources are\n      // deliberately set\n      if (_Tech.nativeSourceHandler) {\n        sh = _Tech.nativeSourceHandler;\n      } else {\n        log$1.error('No source handler found for the current source.');\n      }\n    } // Dispose any existing source handler\n\n\n    this.disposeSourceHandler();\n    this.off('dispose', this.disposeSourceHandler_);\n\n    if (sh !== _Tech.nativeSourceHandler) {\n      this.currentSource_ = source;\n    }\n\n    this.sourceHandler_ = sh.handleSource(source, this, this.options_);\n    this.one('dispose', this.disposeSourceHandler_);\n  };\n  /**\n   * Clean up any existing SourceHandlers and listeners when the Tech is disposed.\n   *\n   * @listens Tech#dispose\n   */\n\n\n  _Tech.prototype.disposeSourceHandler = function () {\n    // if we have a source and get another one\n    // then we are loading something new\n    // than clear all of our current tracks\n    if (this.currentSource_) {\n      this.clearTracks(['audio', 'video']);\n      this.currentSource_ = null;\n    } // always clean up auto-text tracks\n\n\n    this.cleanupAutoTextTracks();\n\n    if (this.sourceHandler_) {\n      if (this.sourceHandler_.dispose) {\n        this.sourceHandler_.dispose();\n      }\n\n      this.sourceHandler_ = null;\n    }\n  };\n}; // The base Tech class needs to be registered as a Component. It is the only\n// Tech that can be registered as a Component.\n\n\nComponent$1.registerComponent('Tech', Tech);\nTech.registerTech('Tech', Tech);\n/**\n * A list of techs that should be added to techOrder on Players\n *\n * @private\n */\n\nTech.defaultTechOrder_ = [];\n\n/**\n * @file middleware.js\n * @module middleware\n */\nvar middlewares = {};\nvar middlewareInstances = {};\nvar TERMINATOR = {};\n/**\n * A middleware object is a plain JavaScript object that has methods that\n * match the {@link Tech} methods found in the lists of allowed\n * {@link module:middleware.allowedGetters|getters},\n * {@link module:middleware.allowedSetters|setters}, and\n * {@link module:middleware.allowedMediators|mediators}.\n *\n * @typedef {Object} MiddlewareObject\n */\n\n/**\n * A middleware factory function that should return a\n * {@link module:middleware~MiddlewareObject|MiddlewareObject}.\n *\n * This factory will be called for each player when needed, with the player\n * passed in as an argument.\n *\n * @callback MiddlewareFactory\n * @param {Player} player\n *        A Video.js player.\n */\n\n/**\n * Define a middleware that the player should use by way of a factory function\n * that returns a middleware object.\n *\n * @param  {string} type\n *         The MIME type to match or `\"*\"` for all MIME types.\n *\n * @param  {MiddlewareFactory} middleware\n *         A middleware factory function that will be executed for\n *         matching types.\n */\n\nfunction use(type, middleware) {\n  middlewares[type] = middlewares[type] || [];\n  middlewares[type].push(middleware);\n}\n/**\n * Asynchronously sets a source using middleware by recursing through any\n * matching middlewares and calling `setSource` on each, passing along the\n * previous returned value each time.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n *\n * @param  {Tech~SourceObject} src\n *         A source object.\n *\n * @param  {Function}\n *         The next middleware to run.\n */\n\nfunction setSource(player, src, next) {\n  player.setTimeout(function () {\n    return setSourceHelper(src, middlewares[src.type], next, player);\n  }, 1);\n}\n/**\n * When the tech is set, passes the tech to each middleware's `setTech` method.\n *\n * @param {Object[]} middleware\n *        An array of middleware instances.\n *\n * @param {Tech} tech\n *        A Video.js tech.\n */\n\nfunction setTech(middleware, tech) {\n  middleware.forEach(function (mw) {\n    return mw.setTech && mw.setTech(tech);\n  });\n}\n/**\n * Calls a getter on the tech first, through each middleware\n * from right to left to the player.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @return {Mixed}\n *         The final value from the tech after middleware has intercepted it.\n */\n\nfunction get(middleware, tech, method) {\n  return middleware.reduceRight(middlewareIterator(method), tech[method]());\n}\n/**\n * Takes the argument given to the player and calls the setter method on each\n * middleware from left to right to the tech.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`.\n */\n\nfunction set(middleware, tech, method, arg) {\n  return tech[method](middleware.reduce(middlewareIterator(method), arg));\n}\n/**\n * Takes the argument given to the player and calls the `call` version of the\n * method on each middleware from left to right.\n *\n * Then, call the passed in method on the tech and return the result unchanged\n * back to the player, through middleware, this time from right to left.\n *\n * @param  {Object[]} middleware\n *         An array of middleware instances.\n *\n * @param  {Tech} tech\n *         The current tech.\n *\n * @param  {string} method\n *         A method name.\n *\n * @param  {Mixed} arg\n *         The value to set on the tech.\n *\n * @return {Mixed}\n *         The return value of the `method` of the `tech`, regardless of the\n *         return values of middlewares.\n */\n\nfunction mediate(middleware, tech, method, arg) {\n  if (arg === void 0) {\n    arg = null;\n  }\n\n  var callMethod = 'call' + toTitleCase$1(method);\n  var middlewareValue = middleware.reduce(middlewareIterator(callMethod), arg);\n  var terminated = middlewareValue === TERMINATOR; // deprecated. The `null` return value should instead return TERMINATOR to\n  // prevent confusion if a techs method actually returns null.\n\n  var returnValue = terminated ? null : tech[method](middlewareValue);\n  executeRight(middleware, method, returnValue, terminated);\n  return returnValue;\n}\n/**\n * Enumeration of allowed getters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedGetters = {\n  buffered: 1,\n  currentTime: 1,\n  duration: 1,\n  muted: 1,\n  played: 1,\n  paused: 1,\n  seekable: 1,\n  volume: 1,\n  ended: 1\n};\n/**\n * Enumeration of allowed setters where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedSetters = {\n  setCurrentTime: 1,\n  setMuted: 1,\n  setVolume: 1\n};\n/**\n * Enumeration of allowed mediators where the keys are method names.\n *\n * @type {Object}\n */\n\nvar allowedMediators = {\n  play: 1,\n  pause: 1\n};\n\nfunction middlewareIterator(method) {\n  return function (value, mw) {\n    // if the previous middleware terminated, pass along the termination\n    if (value === TERMINATOR) {\n      return TERMINATOR;\n    }\n\n    if (mw[method]) {\n      return mw[method](value);\n    }\n\n    return value;\n  };\n}\n\nfunction executeRight(mws, method, value, terminated) {\n  for (var i = mws.length - 1; i >= 0; i--) {\n    var mw = mws[i];\n\n    if (mw[method]) {\n      mw[method](terminated, value);\n    }\n  }\n}\n/**\n * Clear the middleware cache for a player.\n *\n * @param  {Player} player\n *         A {@link Player} instance.\n */\n\n\nfunction clearCacheForPlayer(player) {\n  middlewareInstances[player.id()] = null;\n}\n/**\n * {\n *  [playerId]: [[mwFactory, mwInstance], ...]\n * }\n *\n * @private\n */\n\nfunction getOrCreateFactory(player, mwFactory) {\n  var mws = middlewareInstances[player.id()];\n  var mw = null;\n\n  if (mws === undefined || mws === null) {\n    mw = mwFactory(player);\n    middlewareInstances[player.id()] = [[mwFactory, mw]];\n    return mw;\n  }\n\n  for (var i = 0; i < mws.length; i++) {\n    var _mws$i = mws[i],\n        mwf = _mws$i[0],\n        mwi = _mws$i[1];\n\n    if (mwf !== mwFactory) {\n      continue;\n    }\n\n    mw = mwi;\n  }\n\n  if (mw === null) {\n    mw = mwFactory(player);\n    mws.push([mwFactory, mw]);\n  }\n\n  return mw;\n}\n\nfunction setSourceHelper(src, middleware, next, player, acc, lastRun) {\n  if (src === void 0) {\n    src = {};\n  }\n\n  if (middleware === void 0) {\n    middleware = [];\n  }\n\n  if (acc === void 0) {\n    acc = [];\n  }\n\n  if (lastRun === void 0) {\n    lastRun = false;\n  }\n\n  var _middleware = middleware,\n      mwFactory = _middleware[0],\n      mwrest = _middleware.slice(1); // if mwFactory is a string, then we're at a fork in the road\n\n\n  if (typeof mwFactory === 'string') {\n    setSourceHelper(src, middlewares[mwFactory], next, player, acc, lastRun); // if we have an mwFactory, call it with the player to get the mw,\n    // then call the mw's setSource method\n  } else if (mwFactory) {\n    var mw = getOrCreateFactory(player, mwFactory); // if setSource isn't present, implicitly select this middleware\n\n    if (!mw.setSource) {\n      acc.push(mw);\n      return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n    }\n\n    mw.setSource(assign({}, src), function (err, _src) {\n      // something happened, try the next middleware on the current level\n      // make sure to use the old src\n      if (err) {\n        return setSourceHelper(src, mwrest, next, player, acc, lastRun);\n      } // we've succeeded, now we need to go deeper\n\n\n      acc.push(mw); // if it's the same type, continue down the current chain\n      // otherwise, we want to go down the new chain\n\n      setSourceHelper(_src, src.type === _src.type ? mwrest : middlewares[_src.type], next, player, acc, lastRun);\n    });\n  } else if (mwrest.length) {\n    setSourceHelper(src, mwrest, next, player, acc, lastRun);\n  } else if (lastRun) {\n    next(src, acc);\n  } else {\n    setSourceHelper(src, middlewares['*'], next, player, acc, true);\n  }\n}\n\n/**\n * Mimetypes\n *\n * @see https://www.iana.org/assignments/media-types/media-types.xhtml\n * @typedef Mimetypes~Kind\n * @enum\n */\n\nvar MimetypesKind = {\n  opus: 'video/ogg',\n  ogv: 'video/ogg',\n  mp4: 'video/mp4',\n  mov: 'video/mp4',\n  m4v: 'video/mp4',\n  mkv: 'video/x-matroska',\n  m4a: 'audio/mp4',\n  mp3: 'audio/mpeg',\n  aac: 'audio/aac',\n  caf: 'audio/x-caf',\n  flac: 'audio/flac',\n  oga: 'audio/ogg',\n  wav: 'audio/wav',\n  m3u8: 'application/x-mpegURL',\n  mpd: 'application/dash+xml',\n  jpg: 'image/jpeg',\n  jpeg: 'image/jpeg',\n  gif: 'image/gif',\n  png: 'image/png',\n  svg: 'image/svg+xml',\n  webp: 'image/webp'\n};\n/**\n * Get the mimetype of a given src url if possible\n *\n * @param {string} src\n *        The url to the src\n *\n * @return {string}\n *         return the mimetype if it was known or empty string otherwise\n */\n\nvar getMimetype = function getMimetype(src) {\n  if (src === void 0) {\n    src = '';\n  }\n\n  var ext = getFileExtension(src);\n  var mimetype = MimetypesKind[ext.toLowerCase()];\n  return mimetype || '';\n};\n/**\n * Find the mime type of a given source string if possible. Uses the player\n * source cache.\n *\n * @param {Player} player\n *        The player object\n *\n * @param {string} src\n *        The source string\n *\n * @return {string}\n *         The type that was found\n */\n\nvar findMimetype = function findMimetype(player, src) {\n  if (!src) {\n    return '';\n  } // 1. check for the type in the `source` cache\n\n\n  if (player.cache_.source.src === src && player.cache_.source.type) {\n    return player.cache_.source.type;\n  } // 2. see if we have this source in our `currentSources` cache\n\n\n  var matchingSources = player.cache_.sources.filter(function (s) {\n    return s.src === src;\n  });\n\n  if (matchingSources.length) {\n    return matchingSources[0].type;\n  } // 3. look for the src url in source elements and use the type there\n\n\n  var sources = player.$$('source');\n\n  for (var i = 0; i < sources.length; i++) {\n    var s = sources[i];\n\n    if (s.type && s.src && s.src === src) {\n      return s.type;\n    }\n  } // 4. finally fallback to our list of mime types based on src url extension\n\n\n  return getMimetype(src);\n};\n\n/**\n * @module filter-source\n */\n/**\n * Filter out single bad source objects or multiple source objects in an\n * array. Also flattens nested source object arrays into a 1 dimensional\n * array of source objects.\n *\n * @param {Tech~SourceObject|Tech~SourceObject[]} src\n *        The src object to filter\n *\n * @return {Tech~SourceObject[]}\n *         An array of sourceobjects containing only valid sources\n *\n * @private\n */\n\nvar filterSource = function filterSource(src) {\n  // traverse array\n  if (Array.isArray(src)) {\n    var newsrc = [];\n    src.forEach(function (srcobj) {\n      srcobj = filterSource(srcobj);\n\n      if (Array.isArray(srcobj)) {\n        newsrc = newsrc.concat(srcobj);\n      } else if (isObject(srcobj)) {\n        newsrc.push(srcobj);\n      }\n    });\n    src = newsrc;\n  } else if (typeof src === 'string' && src.trim()) {\n    // convert string into object\n    src = [fixSource({\n      src: src\n    })];\n  } else if (isObject(src) && typeof src.src === 'string' && src.src && src.src.trim()) {\n    // src is already valid\n    src = [fixSource(src)];\n  } else {\n    // invalid source, turn it into an empty array\n    src = [];\n  }\n\n  return src;\n};\n/**\n * Checks src mimetype, adding it when possible\n *\n * @param {Tech~SourceObject} src\n *        The src object to check\n * @return {Tech~SourceObject}\n *        src Object with known type\n */\n\n\nfunction fixSource(src) {\n  if (!src.type) {\n    var mimetype = getMimetype(src.src);\n\n    if (mimetype) {\n      src.type = mimetype;\n    }\n  }\n\n  return src;\n}\n\n/**\n * The `MediaLoader` is the `Component` that decides which playback technology to load\n * when a player is initialized.\n *\n * @extends Component\n */\n\nvar MediaLoader = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MediaLoader, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function that is run when this component is ready.\n   */\n  function MediaLoader(player, options, ready) {\n    var _this;\n\n    // MediaLoader has no element\n    var options_ = mergeOptions$3({\n      createEl: false\n    }, options);\n    _this = _Component.call(this, player, options_, ready) || this; // If there are no sources when the player is initialized,\n    // load the first supported playback technology.\n\n    if (!options.playerOptions.sources || options.playerOptions.sources.length === 0) {\n      for (var i = 0, j = options.playerOptions.techOrder; i < j.length; i++) {\n        var techName = toTitleCase$1(j[i]);\n        var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n        // Remove once that deprecated behavior is removed.\n\n        if (!techName) {\n          tech = Component$1.getComponent(techName);\n        } // Check if the browser supports this technology\n\n\n        if (tech && tech.isSupported()) {\n          player.loadTech_(techName);\n          break;\n        }\n      }\n    } else {\n      // Loop through playback technologies (e.g. HTML5) and check for support.\n      // Then load the best source.\n      // A few assumptions here:\n      //   All playback technologies respect preload false.\n      player.src(options.playerOptions.sources);\n    }\n\n    return _this;\n  }\n\n  return MediaLoader;\n}(Component$1);\n\nComponent$1.registerComponent('MediaLoader', MediaLoader);\n\n/**\n * Component which is clickable or keyboard actionable, but is not a\n * native HTML button.\n *\n * @extends Component\n */\n\nvar ClickableComponent = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ClickableComponent, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of component options.\n   *\n   * @param  {function} [options.clickHandler]\n   *         The function to call when the button is clicked / activated\n   *\n   * @param  {string} [options.controlText]\n   *         The text to set on the button\n   *\n   * @param  {string} [options.className]\n   *         A class or space separated list of classes to add the component\n   *\n   */\n  function ClickableComponent(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    if (_this.options_.controlText) {\n      _this.controlText(_this.options_.controlText);\n    }\n\n    _this.handleMouseOver_ = function (e) {\n      return _this.handleMouseOver(e);\n    };\n\n    _this.handleMouseOut_ = function (e) {\n      return _this.handleMouseOut(e);\n    };\n\n    _this.handleClick_ = function (e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.emitTapEvents();\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `ClickableComponent`s DOM element.\n   *\n   * @param {string} [tag=div]\n   *        The element's node type.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = ClickableComponent.prototype;\n\n  _proto.createEl = function createEl$1(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    props = assign({\n      className: this.buildCSSClass(),\n      tabIndex: 0\n    }, props);\n\n    if (tag === 'button') {\n      log$1.error(\"Creating a ClickableComponent with an HTML element of \" + tag + \" is not supported; use a Button instead.\");\n    } // Add ARIA attributes for clickable element which is not a native HTML button\n\n\n    attributes = assign({\n      role: 'button'\n    }, attributes);\n    this.tabIndex_ = props.tabIndex;\n    var el = createEl(tag, props, attributes);\n    el.appendChild(createEl('span', {\n      className: 'vjs-icon-placeholder'\n    }, {\n      'aria-hidden': true\n    }));\n    this.createControlTextEl(el);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    // remove controlTextEl_ on dispose\n    this.controlTextEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Create a control text element on this `ClickableComponent`\n   *\n   * @param {Element} [el]\n   *        Parent element for the control text.\n   *\n   * @return {Element}\n   *         The control text element that gets created.\n   */\n  ;\n\n  _proto.createControlTextEl = function createControlTextEl(el) {\n    this.controlTextEl_ = createEl('span', {\n      className: 'vjs-control-text'\n    }, {\n      // let the screen reader user know that the text of the element may change\n      'aria-live': 'polite'\n    });\n\n    if (el) {\n      el.appendChild(this.controlTextEl_);\n    }\n\n    this.controlText(this.controlText_, el);\n    return this.controlTextEl_;\n  }\n  /**\n   * Get or set the localize text to use for the controls on the `ClickableComponent`.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.el();\n    }\n\n    if (text === undefined) {\n      return this.controlText_ || 'Need Text';\n    }\n\n    var localizedText = this.localize(text);\n    this.controlText_ = text;\n    textContent(this.controlTextEl_, localizedText);\n\n    if (!this.nonIconControl && !this.player_.options_.noUITitleAttributes) {\n      // Set title attribute if only an icon is shown\n      el.setAttribute('title', localizedText);\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-control vjs-button \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enable this `ClickableComponent`\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (!this.enabled_) {\n      this.enabled_ = true;\n      this.removeClass('vjs-disabled');\n      this.el_.setAttribute('aria-disabled', 'false');\n\n      if (typeof this.tabIndex_ !== 'undefined') {\n        this.el_.setAttribute('tabIndex', this.tabIndex_);\n      }\n\n      this.on(['tap', 'click'], this.handleClick_);\n      this.on('keydown', this.handleKeyDown_);\n    }\n  }\n  /**\n   * Disable this `ClickableComponent`\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.el_.setAttribute('aria-disabled', 'true');\n\n    if (typeof this.tabIndex_ !== 'undefined') {\n      this.el_.removeAttribute('tabIndex');\n    }\n\n    this.off('mouseover', this.handleMouseOver_);\n    this.off('mouseout', this.handleMouseOut_);\n    this.off(['tap', 'click'], this.handleClick_);\n    this.off('keydown', this.handleKeyDown_);\n  }\n  /**\n   * Handles language change in ClickableComponent for the player in components\n   *\n   *\n   */\n  ;\n\n  _proto.handleLanguagechange = function handleLanguagechange() {\n    this.controlText(this.controlText_);\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `click` or `tap` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `tap` or `click` event that caused this function to be called.\n   *\n   * @listens tap\n   * @listens click\n   * @abstract\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.options_.clickHandler) {\n      this.options_.clickHandler.call(this, arguments);\n    }\n  }\n  /**\n   * Event handler that is called when a `ClickableComponent` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Space or Enter, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Support Space or Enter key operation to fire a click event. Also,\n    // prevent the event from propagating through the DOM and triggering\n    // Player hotkeys.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return ClickableComponent;\n}(Component$1);\n\nComponent$1.registerComponent('ClickableComponent', ClickableComponent);\n\n/**\n * A `ClickableComponent` that handles showing the poster image for the player.\n *\n * @extends ClickableComponent\n */\n\nvar PosterImage = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(PosterImage, _ClickableComponent);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should attach to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PosterImage(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n\n    _this.update();\n\n    _this.update_ = function (e) {\n      return _this.update(e);\n    };\n\n    player.on('posterchange', _this.update_);\n    return _this;\n  }\n  /**\n   * Clean up and dispose of the `PosterImage`.\n   */\n\n\n  var _proto = PosterImage.prototype;\n\n  _proto.dispose = function dispose() {\n    this.player().off('posterchange', this.update_);\n\n    _ClickableComponent.prototype.dispose.call(this);\n  }\n  /**\n   * Create the `PosterImage`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = createEl('div', {\n      className: 'vjs-poster',\n      // Don't want poster to be tabbable.\n      tabIndex: -1\n    });\n    return el;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for {@link Player#posterchange} events.\n   *\n   * @listens Player#posterchange\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `Player#posterchange` event that triggered this function.\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var url = this.player().poster();\n    this.setSrc(url); // If there's no poster source we should display:none on this component\n    // so it's not still clickable or right-clickable\n\n    if (url) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  }\n  /**\n   * Set the source of the `PosterImage` depending on the display method.\n   *\n   * @param {string} url\n   *        The URL to the source for the `PosterImage`.\n   */\n  ;\n\n  _proto.setSrc = function setSrc(url) {\n    var backgroundImage = ''; // Any falsy value should stay as an empty string, otherwise\n    // this will throw an extra error\n\n    if (url) {\n      backgroundImage = \"url(\\\"\" + url + \"\\\")\";\n    }\n\n    this.el_.style.backgroundImage = backgroundImage;\n  }\n  /**\n   * An {@link EventTarget~EventListener} for clicks on the `PosterImage`. See\n   * {@link ClickableComponent#handleClick} for instances where this will be triggered.\n   *\n   * @listens tap\n   * @listens click\n   * @listens keydown\n   *\n   * @param {EventTarget~Event} event\n   +        The `click`, `tap` or `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // We don't want a click to trigger playback when controls are disabled\n    if (!this.player_.controls()) {\n      return;\n    }\n\n    var sourceIsEncrypted = this.player_.usingPlugin('eme') && this.player_.eme.sessions && this.player_.eme.sessions.length > 0;\n\n    if (this.player_.tech(true) && // We've observed a bug in IE and Edge when playing back DRM content where\n    // calling .focus() on the video element causes the video to go black,\n    // so we avoid it in that specific case\n    !((IE_VERSION || IS_EDGE) && sourceIsEncrypted)) {\n      this.player_.tech(true).focus();\n    }\n\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  };\n\n  return PosterImage;\n}(ClickableComponent);\n\nComponent$1.registerComponent('PosterImage', PosterImage);\n\nvar darkGray = '#222';\nvar lightGray = '#ccc';\nvar fontMap = {\n  monospace: 'monospace',\n  sansSerif: 'sans-serif',\n  serif: 'serif',\n  monospaceSansSerif: '\"Andale Mono\", \"Lucida Console\", monospace',\n  monospaceSerif: '\"Courier New\", monospace',\n  proportionalSansSerif: 'sans-serif',\n  proportionalSerif: 'serif',\n  casual: '\"Comic Sans MS\", Impact, fantasy',\n  script: '\"Monotype Corsiva\", cursive',\n  smallcaps: '\"Andale Mono\", \"Lucida Console\", monospace, sans-serif'\n};\n/**\n * Construct an rgba color from a given hex color code.\n *\n * @param {number} color\n *        Hex number for color, like #f0e or #f604e2.\n *\n * @param {number} opacity\n *        Value for opacity, 0.0 - 1.0.\n *\n * @return {string}\n *         The rgba color that was created, like 'rgba(255, 0, 0, 0.3)'.\n */\n\nfunction constructColor(color, opacity) {\n  var hex;\n\n  if (color.length === 4) {\n    // color looks like \"#f0e\"\n    hex = color[1] + color[1] + color[2] + color[2] + color[3] + color[3];\n  } else if (color.length === 7) {\n    // color looks like \"#f604e2\"\n    hex = color.slice(1);\n  } else {\n    throw new Error('Invalid color code provided, ' + color + '; must be formatted as e.g. #f0e or #f604e2.');\n  }\n\n  return 'rgba(' + parseInt(hex.slice(0, 2), 16) + ',' + parseInt(hex.slice(2, 4), 16) + ',' + parseInt(hex.slice(4, 6), 16) + ',' + opacity + ')';\n}\n/**\n * Try to update the style of a DOM element. Some style changes will throw an error,\n * particularly in IE8. Those should be noops.\n *\n * @param {Element} el\n *        The DOM element to be styled.\n *\n * @param {string} style\n *        The CSS property on the element that should be styled.\n *\n * @param {string} rule\n *        The style rule that should be applied to the property.\n *\n * @private\n */\n\nfunction tryUpdateStyle(el, style, rule) {\n  try {\n    el.style[style] = rule;\n  } catch (e) {\n    // Satisfies linter.\n    return;\n  }\n}\n/**\n * The component for displaying text track cues.\n *\n * @extends Component\n */\n\n\nvar TextTrackDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TextTrackDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when `TextTrackDisplay` is ready.\n   */\n  function TextTrackDisplay(player, options, ready) {\n    var _this;\n\n    _this = _Component.call(this, player, options, ready) || this;\n\n    var updateDisplayHandler = function updateDisplayHandler(e) {\n      return _this.updateDisplay(e);\n    };\n\n    player.on('loadstart', function (e) {\n      return _this.toggleDisplay(e);\n    });\n    player.on('texttrackchange', updateDisplayHandler);\n    player.on('loadedmetadata', function (e) {\n      return _this.preselectTrack(e);\n    }); // This used to be called during player init, but was causing an error\n    // if a track should show by default and the display hadn't loaded yet.\n    // Should probably be moved to an external track loader when we support\n    // tracks that don't need a display.\n\n    player.ready(bind(_assertThisInitialized(_this), function () {\n      if (player.tech_ && player.tech_.featuresNativeTextTracks) {\n        this.hide();\n        return;\n      }\n\n      player.on('fullscreenchange', updateDisplayHandler);\n      player.on('playerresize', updateDisplayHandler);\n      window$1.addEventListener('orientationchange', updateDisplayHandler);\n      player.on('dispose', function () {\n        return window$1.removeEventListener('orientationchange', updateDisplayHandler);\n      });\n      var tracks = this.options_.playerOptions.tracks || [];\n\n      for (var i = 0; i < tracks.length; i++) {\n        this.player_.addRemoteTextTrack(tracks[i], true);\n      }\n\n      this.preselectTrack();\n    }));\n    return _this;\n  }\n  /**\n  * Preselect a track following this precedence:\n  * - matches the previously selected {@link TextTrack}'s language and kind\n  * - matches the previously selected {@link TextTrack}'s language only\n  * - is the first default captions track\n  * - is the first default descriptions track\n  *\n  * @listens Player#loadstart\n  */\n\n\n  var _proto = TextTrackDisplay.prototype;\n\n  _proto.preselectTrack = function preselectTrack() {\n    var modes = {\n      captions: 1,\n      subtitles: 1\n    };\n    var trackList = this.player_.textTracks();\n    var userPref = this.player_.cache_.selectedLanguage;\n    var firstDesc;\n    var firstCaptions;\n    var preferredTrack;\n\n    for (var i = 0; i < trackList.length; i++) {\n      var track = trackList[i];\n\n      if (userPref && userPref.enabled && userPref.language && userPref.language === track.language && track.kind in modes) {\n        // Always choose the track that matches both language and kind\n        if (track.kind === userPref.kind) {\n          preferredTrack = track; // or choose the first track that matches language\n        } else if (!preferredTrack) {\n          preferredTrack = track;\n        } // clear everything if offTextTrackMenuItem was clicked\n\n      } else if (userPref && !userPref.enabled) {\n        preferredTrack = null;\n        firstDesc = null;\n        firstCaptions = null;\n      } else if (track[\"default\"]) {\n        if (track.kind === 'descriptions' && !firstDesc) {\n          firstDesc = track;\n        } else if (track.kind in modes && !firstCaptions) {\n          firstCaptions = track;\n        }\n      }\n    } // The preferredTrack matches the user preference and takes\n    // precedence over all the other tracks.\n    // So, display the preferredTrack before the first default track\n    // and the subtitles/captions track before the descriptions track\n\n\n    if (preferredTrack) {\n      preferredTrack.mode = 'showing';\n    } else if (firstCaptions) {\n      firstCaptions.mode = 'showing';\n    } else if (firstDesc) {\n      firstDesc.mode = 'showing';\n    }\n  }\n  /**\n   * Turn display of {@link TextTrack}'s from the current state into the other state.\n   * There are only two states:\n   * - 'shown'\n   * - 'hidden'\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.toggleDisplay = function toggleDisplay() {\n    if (this.player_.tech_ && this.player_.tech_.featuresNativeTextTracks) {\n      this.hide();\n    } else {\n      this.show();\n    }\n  }\n  /**\n   * Create the {@link Component}'s DOM element.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-text-track-display'\n    }, {\n      'translate': 'yes',\n      'aria-live': 'off',\n      'aria-atomic': 'true'\n    });\n  }\n  /**\n   * Clear all displayed {@link TextTrack}s.\n   */\n  ;\n\n  _proto.clearDisplay = function clearDisplay() {\n    if (typeof window$1.WebVTT === 'function') {\n      window$1.WebVTT.processCues(window$1, [], this.el_);\n    }\n  }\n  /**\n   * Update the displayed TextTrack when a either a {@link Player#texttrackchange} or\n   * a {@link Player#fullscreenchange} is fired.\n   *\n   * @listens Player#texttrackchange\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var tracks = this.player_.textTracks();\n    var allowMultipleShowingTracks = this.options_.allowMultipleShowingTracks;\n    this.clearDisplay();\n\n    if (allowMultipleShowingTracks) {\n      var showingTracks = [];\n\n      for (var _i = 0; _i < tracks.length; ++_i) {\n        var track = tracks[_i];\n\n        if (track.mode !== 'showing') {\n          continue;\n        }\n\n        showingTracks.push(track);\n      }\n\n      this.updateForTrack(showingTracks);\n      return;\n    } //  Track display prioritization model: if multiple tracks are 'showing',\n    //  display the first 'subtitles' or 'captions' track which is 'showing',\n    //  otherwise display the first 'descriptions' track which is 'showing'\n\n\n    var descriptionsTrack = null;\n    var captionsSubtitlesTrack = null;\n    var i = tracks.length;\n\n    while (i--) {\n      var _track = tracks[i];\n\n      if (_track.mode === 'showing') {\n        if (_track.kind === 'descriptions') {\n          descriptionsTrack = _track;\n        } else {\n          captionsSubtitlesTrack = _track;\n        }\n      }\n    }\n\n    if (captionsSubtitlesTrack) {\n      if (this.getAttribute('aria-live') !== 'off') {\n        this.setAttribute('aria-live', 'off');\n      }\n\n      this.updateForTrack(captionsSubtitlesTrack);\n    } else if (descriptionsTrack) {\n      if (this.getAttribute('aria-live') !== 'assertive') {\n        this.setAttribute('aria-live', 'assertive');\n      }\n\n      this.updateForTrack(descriptionsTrack);\n    }\n  }\n  /**\n   * Style {@Link TextTrack} activeCues according to {@Link TextTrackSettings}.\n   *\n   * @param {TextTrack} track\n   *        Text track object containing active cues to style.\n   */\n  ;\n\n  _proto.updateDisplayState = function updateDisplayState(track) {\n    var overrides = this.player_.textTrackSettings.getValues();\n    var cues = track.activeCues;\n    var i = cues.length;\n\n    while (i--) {\n      var cue = cues[i];\n\n      if (!cue) {\n        continue;\n      }\n\n      var cueDiv = cue.displayState;\n\n      if (overrides.color) {\n        cueDiv.firstChild.style.color = overrides.color;\n      }\n\n      if (overrides.textOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'color', constructColor(overrides.color || '#fff', overrides.textOpacity));\n      }\n\n      if (overrides.backgroundColor) {\n        cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;\n      }\n\n      if (overrides.backgroundOpacity) {\n        tryUpdateStyle(cueDiv.firstChild, 'backgroundColor', constructColor(overrides.backgroundColor || '#000', overrides.backgroundOpacity));\n      }\n\n      if (overrides.windowColor) {\n        if (overrides.windowOpacity) {\n          tryUpdateStyle(cueDiv, 'backgroundColor', constructColor(overrides.windowColor, overrides.windowOpacity));\n        } else {\n          cueDiv.style.backgroundColor = overrides.windowColor;\n        }\n      }\n\n      if (overrides.edgeStyle) {\n        if (overrides.edgeStyle === 'dropshadow') {\n          cueDiv.firstChild.style.textShadow = \"2px 2px 3px \" + darkGray + \", 2px 2px 4px \" + darkGray + \", 2px 2px 5px \" + darkGray;\n        } else if (overrides.edgeStyle === 'raised') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + darkGray + \", 2px 2px \" + darkGray + \", 3px 3px \" + darkGray;\n        } else if (overrides.edgeStyle === 'depressed') {\n          cueDiv.firstChild.style.textShadow = \"1px 1px \" + lightGray + \", 0 1px \" + lightGray + \", -1px -1px \" + darkGray + \", 0 -1px \" + darkGray;\n        } else if (overrides.edgeStyle === 'uniform') {\n          cueDiv.firstChild.style.textShadow = \"0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray + \", 0 0 4px \" + darkGray;\n        }\n      }\n\n      if (overrides.fontPercent && overrides.fontPercent !== 1) {\n        var fontSize = window$1.parseFloat(cueDiv.style.fontSize);\n        cueDiv.style.fontSize = fontSize * overrides.fontPercent + 'px';\n        cueDiv.style.height = 'auto';\n        cueDiv.style.top = 'auto';\n      }\n\n      if (overrides.fontFamily && overrides.fontFamily !== 'default') {\n        if (overrides.fontFamily === 'small-caps') {\n          cueDiv.firstChild.style.fontVariant = 'small-caps';\n        } else {\n          cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];\n        }\n      }\n    }\n  }\n  /**\n   * Add an {@link TextTrack} to to the {@link Tech}s {@link TextTrackList}.\n   *\n   * @param {TextTrack|TextTrack[]} tracks\n   *        Text track object or text track array to be added to the list.\n   */\n  ;\n\n  _proto.updateForTrack = function updateForTrack(tracks) {\n    if (!Array.isArray(tracks)) {\n      tracks = [tracks];\n    }\n\n    if (typeof window$1.WebVTT !== 'function' || tracks.every(function (track) {\n      return !track.activeCues;\n    })) {\n      return;\n    }\n\n    var cues = []; // push all active track cues\n\n    for (var i = 0; i < tracks.length; ++i) {\n      var track = tracks[i];\n\n      for (var j = 0; j < track.activeCues.length; ++j) {\n        cues.push(track.activeCues[j]);\n      }\n    } // removes all cues before it processes new ones\n\n\n    window$1.WebVTT.processCues(window$1, cues, this.el_); // add unique class to each language text track & add settings styling if necessary\n\n    for (var _i2 = 0; _i2 < tracks.length; ++_i2) {\n      var _track2 = tracks[_i2];\n\n      for (var _j = 0; _j < _track2.activeCues.length; ++_j) {\n        var cueEl = _track2.activeCues[_j].displayState;\n        addClass(cueEl, 'vjs-text-track-cue');\n        addClass(cueEl, 'vjs-text-track-cue-' + (_track2.language ? _track2.language : _i2));\n\n        if (_track2.language) {\n          setAttribute(cueEl, 'lang', _track2.language);\n        }\n      }\n\n      if (this.player_.textTrackSettings) {\n        this.updateDisplayState(_track2);\n      }\n    }\n  };\n\n  return TextTrackDisplay;\n}(Component$1);\n\nComponent$1.registerComponent('TextTrackDisplay', TextTrackDisplay);\n\n/**\n * A loading spinner for use during waiting/loading events.\n *\n * @extends Component\n */\n\nvar LoadingSpinner = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LoadingSpinner, _Component);\n\n  function LoadingSpinner() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = LoadingSpinner.prototype;\n\n  /**\n   * Create the `LoadingSpinner`s DOM element.\n   *\n   * @return {Element}\n   *         The dom element that gets created.\n   */\n  _proto.createEl = function createEl$1() {\n    var isAudio = this.player_.isAudio();\n    var playerType = this.localize(isAudio ? 'Audio Player' : 'Video Player');\n    var controlText = createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize('{1} is loading.', [playerType])\n    });\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-loading-spinner',\n      dir: 'ltr'\n    });\n\n    el.appendChild(controlText);\n    return el;\n  };\n\n  return LoadingSpinner;\n}(Component$1);\n\nComponent$1.registerComponent('LoadingSpinner', LoadingSpinner);\n\n/**\n * Base class for all buttons.\n *\n * @extends ClickableComponent\n */\n\nvar Button = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(Button, _ClickableComponent);\n\n  function Button() {\n    return _ClickableComponent.apply(this, arguments) || this;\n  }\n\n  var _proto = Button.prototype;\n\n  /**\n   * Create the `Button`s DOM element.\n   *\n   * @param {string} [tag=\"button\"]\n   *        The element's node type. This argument is IGNORED: no matter what\n   *        is passed, it will always create a `button` element.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element.\n   *\n   * @param {Object} [attributes={}]\n   *        An object of attributes that should be set on the element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  _proto.createEl = function createEl$1(tag, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    tag = 'button';\n    props = assign({\n      className: this.buildCSSClass()\n    }, props); // Add attributes for button element\n\n    attributes = assign({\n      // Necessary since the default button type is \"submit\"\n      type: 'button'\n    }, attributes);\n\n    var el = createEl(tag, props, attributes);\n\n    el.appendChild(createEl('span', {\n      className: 'vjs-icon-placeholder'\n    }, {\n      'aria-hidden': true\n    }));\n    this.createControlTextEl(el);\n    return el;\n  }\n  /**\n   * Add a child `Component` inside of this `Button`.\n   *\n   * @param {string|Component} child\n   *        The name or instance of a child to add.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of options that will get passed to children of\n   *        the child.\n   *\n   * @return {Component}\n   *         The `Component` that gets added as a child. When using a string the\n   *         `Component` will get created by this process.\n   *\n   * @deprecated since version 5\n   */\n  ;\n\n  _proto.addChild = function addChild(child, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var className = this.constructor.name;\n    log$1.warn(\"Adding an actionable (user controllable) child to a Button (\" + className + \") is not supported; use a ClickableComponent instead.\"); // Avoid the error message generated by ClickableComponent's addChild method\n\n    return Component$1.prototype.addChild.call(this, child, options);\n  }\n  /**\n   * Enable the `Button` element so that it can be activated or clicked. Use this with\n   * {@link Button#disable}.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    _ClickableComponent.prototype.enable.call(this);\n\n    this.el_.removeAttribute('disabled');\n  }\n  /**\n   * Disable the `Button` element so that it cannot be activated or clicked. Use this with\n   * {@link Button#enable}.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    _ClickableComponent.prototype.disable.call(this);\n\n    this.el_.setAttribute('disabled', 'disabled');\n  }\n  /**\n   * This gets called when a `Button` has focus and `keydown` is triggered via a key\n   * press.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to get called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Ignore Space or Enter key operation, which is handled by the browser for\n    // a button - though not for its super class, ClickableComponent. Also,\n    // prevent the event from propagating through the DOM and triggering Player\n    // hotkeys. We do not preventDefault here because we _want_ the browser to\n    // handle it.\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.stopPropagation();\n      return;\n    } // Pass keypress handling up for unsupported keys\n\n\n    _ClickableComponent.prototype.handleKeyDown.call(this, event);\n  };\n\n  return Button;\n}(ClickableComponent);\n\nComponent$1.registerComponent('Button', Button);\n\n/**\n * The initial play button that shows before the video has played. The hiding of the\n * `BigPlayButton` get done via CSS and `Player` states.\n *\n * @extends Button\n */\n\nvar BigPlayButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(BigPlayButton, _Button);\n\n  function BigPlayButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n    _this.mouseused_ = false;\n\n    _this.on('mousedown', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object. Always returns 'vjs-big-play-button'.\n   */\n\n\n  var _proto = BigPlayButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-big-play-button';\n  }\n  /**\n   * This gets called when a `BigPlayButton` \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var playPromise = this.player_.play(); // exit early if clicked via the mouse\n\n    if (this.mouseused_ && event.clientX && event.clientY) {\n      var sourceIsEncrypted = this.player_.usingPlugin('eme') && this.player_.eme.sessions && this.player_.eme.sessions.length > 0;\n      silencePromise(playPromise);\n\n      if (this.player_.tech(true) && // We've observed a bug in IE and Edge when playing back DRM content where\n      // calling .focus() on the video element causes the video to go black,\n      // so we avoid it in that specific case\n      !((IE_VERSION || IS_EDGE) && sourceIsEncrypted)) {\n        this.player_.tech(true).focus();\n      }\n\n      return;\n    }\n\n    var cb = this.player_.getChild('controlBar');\n    var playToggle = cb && cb.getChild('playToggle');\n\n    if (!playToggle) {\n      this.player_.tech(true).focus();\n      return;\n    }\n\n    var playFocus = function playFocus() {\n      return playToggle.focus();\n    };\n\n    if (isPromise(playPromise)) {\n      playPromise.then(playFocus, function () {});\n    } else {\n      this.setTimeout(playFocus, 1);\n    }\n  };\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    this.mouseused_ = false;\n\n    _Button.prototype.handleKeyDown.call(this, event);\n  };\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    this.mouseused_ = true;\n  };\n\n  return BigPlayButton;\n}(Button);\n/**\n * The text that should display over the `BigPlayButton`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n */\n\n\nBigPlayButton.prototype.controlText_ = 'Play Video';\nComponent$1.registerComponent('BigPlayButton', BigPlayButton);\n\n/**\n * The `CloseButton` is a `{@link Button}` that fires a `close` event when\n * it gets clicked.\n *\n * @extends Button\n */\n\nvar CloseButton = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(CloseButton, _Button);\n\n  /**\n  * Creates an instance of the this class.\n  *\n  * @param  {Player} player\n  *         The `Player` that this class should be attached to.\n  *\n  * @param  {Object} [options]\n  *         The key/value store of player options.\n  */\n  function CloseButton(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.controlText(options && options.controlText || _this.localize('Close'));\n\n    return _this;\n  }\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n\n\n  var _proto = CloseButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-close-button \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when a `CloseButton` gets clicked. See\n   * {@link ClickableComponent#handleClick} for more information on when\n   * this will be triggered\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   * @fires CloseButton#close\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    /**\n     * Triggered when the a `CloseButton` is clicked.\n     *\n     * @event CloseButton#close\n     * @type {EventTarget~Event}\n     *\n     * @property {boolean} [bubbles=false]\n     *           set to false so that the close event does not\n     *           bubble up to parents if there is no listener\n     */\n    this.trigger({\n      type: 'close',\n      bubbles: false\n    });\n  }\n  /**\n   * Event handler that is called when a `CloseButton` receives a\n   * `keydown` event.\n   *\n   * By default, if the key is Esc, it will trigger a `click` event.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Esc button will trigger `click` event\n    if (keycode.isEventKey(event, 'Esc')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.trigger('click');\n    } else {\n      // Pass keypress handling up for unsupported keys\n      _Button.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  return CloseButton;\n}(Button);\n\nComponent$1.registerComponent('CloseButton', CloseButton);\n\n/**\n * Button to toggle between play and pause.\n *\n * @extends Button\n */\n\nvar PlayToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(PlayToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function PlayToggle(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Button.call(this, player, options) || this; // show or hide replay icon\n\n    options.replay = options.replay === undefined || options.replay;\n\n    _this.on(player, 'play', function (e) {\n      return _this.handlePlay(e);\n    });\n\n    _this.on(player, 'pause', function (e) {\n      return _this.handlePause(e);\n    });\n\n    if (options.replay) {\n      _this.on(player, 'ended', function (e) {\n        return _this.handleEnded(e);\n      });\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PlayToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-play-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `PlayToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.player_.paused()) {\n      silencePromise(this.player_.play());\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * This gets called once after the video has ended and the user seeks so that\n   * we can change the replay button back to a play button.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#seeked\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked(event) {\n    this.removeClass('vjs-ended');\n\n    if (this.player_.paused()) {\n      this.handlePause(event);\n    } else {\n      this.handlePlay(event);\n    }\n  }\n  /**\n   * Add the vjs-playing class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#play\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay(event) {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // change the button text to \"Pause\"\n\n    this.controlText('Pause');\n  }\n  /**\n   * Add the vjs-paused class to the element so it can change appearance.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#pause\n   */\n  ;\n\n  _proto.handlePause = function handlePause(event) {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused'); // change the button text to \"Play\"\n\n    this.controlText('Play');\n  }\n  /**\n   * Add the vjs-ended class to the element so it can change appearance\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ended\n   */\n  ;\n\n  _proto.handleEnded = function handleEnded(event) {\n    var _this2 = this;\n\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-ended'); // change the button text to \"Replay\"\n\n    this.controlText('Replay'); // on the next seek remove the replay button\n\n    this.one(this.player_, 'seeked', function (e) {\n      return _this2.handleSeeked(e);\n    });\n  };\n\n  return PlayToggle;\n}(Button);\n/**\n * The text that should display over the `PlayToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlayToggle.prototype.controlText_ = 'Play';\nComponent$1.registerComponent('PlayToggle', PlayToggle);\n\n/**\n * @file format-time.js\n * @module format-time\n */\n\n/**\n * Format seconds as a time string, H:MM:SS or M:SS. Supplying a guide (in\n * seconds) will force a number of leading zeros to cover the length of the\n * guide.\n *\n * @private\n * @param  {number} seconds\n *         Number of seconds to be turned into a string\n *\n * @param  {number} guide\n *         Number (in seconds) to model the string after\n *\n * @return {string}\n *         Time formatted as H:MM:SS or M:SS\n */\nvar defaultImplementation = function defaultImplementation(seconds, guide) {\n  seconds = seconds < 0 ? 0 : seconds;\n  var s = Math.floor(seconds % 60);\n  var m = Math.floor(seconds / 60 % 60);\n  var h = Math.floor(seconds / 3600);\n  var gm = Math.floor(guide / 60 % 60);\n  var gh = Math.floor(guide / 3600); // handle invalid times\n\n  if (isNaN(seconds) || seconds === Infinity) {\n    // '-' is false for all relational operators (e.g. <, >=) so this setting\n    // will add the minimum number of fields specified by the guide\n    h = m = s = '-';\n  } // Check if we need to show hours\n\n\n  h = h > 0 || gh > 0 ? h + ':' : ''; // If hours are showing, we may need to add a leading zero.\n  // Always show at least one digit of minutes.\n\n  m = ((h || gm >= 10) && m < 10 ? '0' + m : m) + ':'; // Check if leading zero is need for seconds\n\n  s = s < 10 ? '0' + s : s;\n  return h + m + s;\n}; // Internal pointer to the current implementation.\n\n\nvar implementation = defaultImplementation;\n/**\n * Replaces the default formatTime implementation with a custom implementation.\n *\n * @param {Function} customImplementation\n *        A function which will be used in place of the default formatTime\n *        implementation. Will receive the current time in seconds and the\n *        guide (in seconds) as arguments.\n */\n\nfunction setFormatTime(customImplementation) {\n  implementation = customImplementation;\n}\n/**\n * Resets formatTime to the default implementation.\n */\n\nfunction resetFormatTime() {\n  implementation = defaultImplementation;\n}\n/**\n * Delegates to either the default time formatting function or a custom\n * function supplied via `setFormatTime`.\n *\n * Formats seconds as a time string (H:MM:SS or M:SS). Supplying a\n * guide (in seconds) will force a number of leading zeros to cover the\n * length of the guide.\n *\n * @static\n * @example  formatTime(125, 600) === \"02:05\"\n * @param    {number} seconds\n *           Number of seconds to be turned into a string\n *\n * @param    {number} guide\n *           Number (in seconds) to model the string after\n *\n * @return   {string}\n *           Time formatted as H:MM:SS or M:SS\n */\n\nfunction formatTime(seconds, guide) {\n  if (guide === void 0) {\n    guide = seconds;\n  }\n\n  return implementation(seconds, guide);\n}\n\n/**\n * Displays time information about the video\n *\n * @extends Component\n */\n\nvar TimeDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.on(player, ['timeupdate', 'ended'], function (e) {\n      return _this.updateContent(e);\n    });\n\n    _this.updateTextNode_();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var className = this.buildCSSClass();\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: className + \" vjs-time-control vjs-control\"\n    });\n\n    var span = createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize(this.labelText_) + \"\\xA0\"\n    }, {\n      role: 'presentation'\n    });\n    el.appendChild(span);\n    this.contentEl_ = createEl('span', {\n      className: className + \"-display\"\n    }, {\n      // tell screen readers not to automatically read the time as it changes\n      'aria-live': 'off',\n      // span elements have no implicit role, but some screen readers (notably VoiceOver)\n      // treat them as a break between items in the DOM when using arrow keys\n      // (or left-to-right swipes on iOS) to read contents of a page. Using\n      // role='presentation' causes VoiceOver to NOT treat this span as a break.\n      'role': 'presentation'\n    });\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.textNode_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Updates the time display text node with a new time\n   *\n   * @param {number} [time=0] the time to update to\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateTextNode_ = function updateTextNode_(time) {\n    var _this2 = this;\n\n    if (time === void 0) {\n      time = 0;\n    }\n\n    time = formatTime(time);\n\n    if (this.formattedTime_ === time) {\n      return;\n    }\n\n    this.formattedTime_ = time;\n    this.requestNamedAnimationFrame('TimeDisplay#updateTextNode_', function () {\n      if (!_this2.contentEl_) {\n        return;\n      }\n\n      var oldNode = _this2.textNode_;\n\n      if (oldNode && _this2.contentEl_.firstChild !== oldNode) {\n        oldNode = null;\n        log$1.warn('TimeDisplay#updateTextnode_: Prevented replacement of text node element since it was no longer a child of this node. Appending a new node instead.');\n      }\n\n      _this2.textNode_ = document.createTextNode(_this2.formattedTime_);\n\n      if (!_this2.textNode_) {\n        return;\n      }\n\n      if (oldNode) {\n        _this2.contentEl_.replaceChild(_this2.textNode_, oldNode);\n      } else {\n        _this2.contentEl_.appendChild(_this2.textNode_);\n      }\n    });\n  }\n  /**\n   * To be filled out in the child class, should update the displayed time\n   * in accordance with the fact that the current time has changed.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate`  event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {};\n\n  return TimeDisplay;\n}(Component$1);\n/**\n * The text that is added to the `TimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nTimeDisplay.prototype.labelText_ = 'Time';\n/**\n * The text that should display over the `TimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nTimeDisplay.prototype.controlText_ = 'Time';\nComponent$1.registerComponent('TimeDisplay', TimeDisplay);\n\n/**\n * Displays the current time\n *\n * @extends Component\n */\n\nvar CurrentTimeDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(CurrentTimeDisplay, _TimeDisplay);\n\n  function CurrentTimeDisplay() {\n    return _TimeDisplay.apply(this, arguments) || this;\n  }\n\n  var _proto = CurrentTimeDisplay.prototype;\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-current-time';\n  }\n  /**\n   * Update current time display\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` event that caused this function to run.\n   *\n   * @listens Player#timeupdate\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    // Allows for smooth scrubbing, when player can't keep up.\n    var time;\n\n    if (this.player_.ended()) {\n      time = this.player_.duration();\n    } else {\n      time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    }\n\n    this.updateTextNode_(time);\n  };\n\n  return CurrentTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `CurrentTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nCurrentTimeDisplay.prototype.labelText_ = 'Current Time';\n/**\n * The text that should display over the `CurrentTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nCurrentTimeDisplay.prototype.controlText_ = 'Current Time';\nComponent$1.registerComponent('CurrentTimeDisplay', CurrentTimeDisplay);\n\n/**\n * Displays the duration\n *\n * @extends Component\n */\n\nvar DurationDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(DurationDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function DurationDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    var updateContent = function updateContent(e) {\n      return _this.updateContent(e);\n    }; // we do not want to/need to throttle duration changes,\n    // as they should always display the changed duration as\n    // it has changed\n\n\n    _this.on(player, 'durationchange', updateContent); // Listen to loadstart because the player duration is reset when a new media element is loaded,\n    // but the durationchange on the user agent will not fire.\n    // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n\n    _this.on(player, 'loadstart', updateContent); // Also listen for timeupdate (in the parent) and loadedmetadata because removing those\n    // listeners could have broken dependent applications/libraries. These\n    // can likely be removed for 7.0.\n\n\n    _this.on(player, 'loadedmetadata', updateContent);\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = DurationDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-duration';\n  }\n  /**\n   * Update duration time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `durationchange`, `timeupdate`, or `loadedmetadata` event that caused\n   *        this function to be called.\n   *\n   * @listens Player#durationchange\n   * @listens Player#timeupdate\n   * @listens Player#loadedmetadata\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    var duration = this.player_.duration();\n    this.updateTextNode_(duration);\n  };\n\n  return DurationDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `DurationDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nDurationDisplay.prototype.labelText_ = 'Duration';\n/**\n * The text that should display over the `DurationDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nDurationDisplay.prototype.controlText_ = 'Duration';\nComponent$1.registerComponent('DurationDisplay', DurationDisplay);\n\n/**\n * The separator between the current time and duration.\n * Can be hidden if it's not needed in the design.\n *\n * @extends Component\n */\n\nvar TimeDivider = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeDivider, _Component);\n\n  function TimeDivider() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = TimeDivider.prototype;\n\n  /**\n   * Create the component's DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-control vjs-time-divider'\n    }, {\n      // this element and its contents can be hidden from assistive techs since\n      // it is made extraneous by the announcement of the control text\n      // for the current time and duration displays\n      'aria-hidden': true\n    });\n\n    var div = _Component.prototype.createEl.call(this, 'div');\n\n    var span = _Component.prototype.createEl.call(this, 'span', {\n      textContent: '/'\n    });\n\n    div.appendChild(span);\n    el.appendChild(div);\n    return el;\n  };\n\n  return TimeDivider;\n}(Component$1);\n\nComponent$1.registerComponent('TimeDivider', TimeDivider);\n\n/**\n * Displays the time left in the video\n *\n * @extends Component\n */\n\nvar RemainingTimeDisplay = /*#__PURE__*/function (_TimeDisplay) {\n  _inheritsLoose(RemainingTimeDisplay, _TimeDisplay);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function RemainingTimeDisplay(player, options) {\n    var _this;\n\n    _this = _TimeDisplay.call(this, player, options) || this;\n\n    _this.on(player, 'durationchange', function (e) {\n      return _this.updateContent(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = RemainingTimeDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return 'vjs-remaining-time';\n  }\n  /**\n   * Create the `Component`'s DOM element with the \"minus\" characted prepend to the time\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var el = _TimeDisplay.prototype.createEl.call(this);\n\n    if (this.options_.displayNegative !== false) {\n      el.insertBefore(createEl('span', {}, {\n        'aria-hidden': true\n      }, '-'), this.contentEl_);\n    }\n\n    return el;\n  }\n  /**\n   * Update remaining time display.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `durationchange` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateContent = function updateContent(event) {\n    if (typeof this.player_.duration() !== 'number') {\n      return;\n    }\n\n    var time; // @deprecated We should only use remainingTimeDisplay\n    // as of video.js 7\n\n    if (this.player_.ended()) {\n      time = 0;\n    } else if (this.player_.remainingTimeDisplay) {\n      time = this.player_.remainingTimeDisplay();\n    } else {\n      time = this.player_.remainingTime();\n    }\n\n    this.updateTextNode_(time);\n  };\n\n  return RemainingTimeDisplay;\n}(TimeDisplay);\n/**\n * The text that is added to the `RemainingTimeDisplay` for screen reader users.\n *\n * @type {string}\n * @private\n */\n\n\nRemainingTimeDisplay.prototype.labelText_ = 'Remaining Time';\n/**\n * The text that should display over the `RemainingTimeDisplay`s controls. Added to for localization.\n *\n * @type {string}\n * @private\n *\n * @deprecated in v7; controlText_ is not used in non-active display Components\n */\n\nRemainingTimeDisplay.prototype.controlText_ = 'Remaining Time';\nComponent$1.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar LiveDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LiveDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LiveDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.updateShowing();\n\n    _this.on(_this.player(), 'durationchange', function (e) {\n      return _this.updateShowing(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LiveDisplay.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-live-control vjs-control'\n    });\n\n    this.contentEl_ = createEl('div', {\n      className: 'vjs-live-display'\n    }, {\n      'aria-live': 'off'\n    });\n    this.contentEl_.appendChild(createEl('span', {\n      className: 'vjs-control-text',\n      textContent: this.localize('Stream Type') + \"\\xA0\"\n    }));\n    this.contentEl_.appendChild(document.createTextNode(this.localize('LIVE')));\n    el.appendChild(this.contentEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Check the duration to see if the LiveDisplay should be showing or not. Then show/hide\n   * it accordingly\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#durationchange} event that caused this function to run.\n   *\n   * @listens Player#durationchange\n   */\n  ;\n\n  _proto.updateShowing = function updateShowing(event) {\n    if (this.player().duration() === Infinity) {\n      this.show();\n    } else {\n      this.hide();\n    }\n  };\n\n  return LiveDisplay;\n}(Component$1);\n\nComponent$1.registerComponent('LiveDisplay', LiveDisplay);\n\n/**\n * Displays the live indicator when duration is Infinity.\n *\n * @extends Component\n */\n\nvar SeekToLive = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(SeekToLive, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekToLive(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.updateLiveEdgeStatus();\n\n    if (_this.player_.liveTracker) {\n      _this.updateLiveEdgeStatusHandler_ = function (e) {\n        return _this.updateLiveEdgeStatus(e);\n      };\n\n      _this.on(_this.player_.liveTracker, 'liveedgechange', _this.updateLiveEdgeStatusHandler_);\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = SeekToLive.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Button.prototype.createEl.call(this, 'button', {\n      className: 'vjs-seek-to-live-control vjs-control'\n    });\n\n    this.textEl_ = createEl('span', {\n      className: 'vjs-seek-to-live-text',\n      textContent: this.localize('LIVE')\n    }, {\n      'aria-hidden': 'true'\n    });\n    el.appendChild(this.textEl_);\n    return el;\n  }\n  /**\n   * Update the state of this button if we are at the live edge\n   * or not\n   */\n  ;\n\n  _proto.updateLiveEdgeStatus = function updateLiveEdgeStatus() {\n    // default to live edge\n    if (!this.player_.liveTracker || this.player_.liveTracker.atLiveEdge()) {\n      this.setAttribute('aria-disabled', true);\n      this.addClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently playing live');\n    } else {\n      this.setAttribute('aria-disabled', false);\n      this.removeClass('vjs-at-live-edge');\n      this.controlText('Seek to live, currently behind live');\n    }\n  }\n  /**\n   * On click bring us as near to the live point as possible.\n   * This requires that we wait for the next `live-seekable-change`\n   * event which will happen every segment length seconds.\n   */\n  ;\n\n  _proto.handleClick = function handleClick() {\n    this.player_.liveTracker.seekToLiveEdge();\n  }\n  /**\n   * Dispose of the element and stop tracking\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.updateLiveEdgeStatusHandler_);\n    }\n\n    this.textEl_ = null;\n\n    _Button.prototype.dispose.call(this);\n  };\n\n  return SeekToLive;\n}(Button);\n\nSeekToLive.prototype.controlText_ = 'Seek to live, currently playing live';\nComponent$1.registerComponent('SeekToLive', SeekToLive);\n\n/**\n * Keep a number between a min and a max value\n *\n * @param {number} number\n *        The number to clamp\n *\n * @param {number} min\n *        The minimum value\n * @param {number} max\n *        The maximum value\n *\n * @return {number}\n *         the clamped number\n */\nvar clamp = function clamp(number, min, max) {\n  number = Number(number);\n  return Math.min(max, Math.max(min, isNaN(number) ? min : number));\n};\n\n/**\n * The base functionality for a slider. Can be vertical or horizontal.\n * For instance the volume bar or the seek bar on a video is a slider.\n *\n * @extends Component\n */\n\nvar Slider = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Slider, _Component);\n\n  /**\n  * Create an instance of this class\n  *\n  * @param {Player} player\n  *        The `Player` that this class should be attached to.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  */\n  function Slider(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    _this.handleMouseDown_ = function (e) {\n      return _this.handleMouseDown(e);\n    };\n\n    _this.handleMouseUp_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.handleKeyDown_ = function (e) {\n      return _this.handleKeyDown(e);\n    };\n\n    _this.handleClick_ = function (e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleMouseMove_ = function (e) {\n      return _this.handleMouseMove(e);\n    };\n\n    _this.update_ = function (e) {\n      return _this.update(e);\n    }; // Set property names to bar to match with the child Slider class is looking for\n\n\n    _this.bar = _this.getChild(_this.options_.barName); // Set a horizontal or vertical class on the slider depending on the slider type\n\n    _this.vertical(!!_this.options_.vertical);\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Are controls are currently enabled for this slider or not.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n\n\n  var _proto = Slider.prototype;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Enable controls for this slider if they are disabled\n   */\n  ;\n\n  _proto.enable = function enable() {\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on('mousedown', this.handleMouseDown_);\n    this.on('touchstart', this.handleMouseDown_);\n    this.on('keydown', this.handleKeyDown_);\n    this.on('click', this.handleClick_); // TODO: deprecated, controlsvisible does not seem to be fired\n\n    this.on(this.player_, 'controlsvisible', this.update);\n\n    if (this.playerEvent) {\n      this.on(this.player_, this.playerEvent, this.update);\n    }\n\n    this.removeClass('disabled');\n    this.setAttribute('tabindex', 0);\n    this.enabled_ = true;\n  }\n  /**\n   * Disable controls for this slider if they are enabled\n   */\n  ;\n\n  _proto.disable = function disable() {\n    if (!this.enabled()) {\n      return;\n    }\n\n    var doc = this.bar.el_.ownerDocument;\n    this.off('mousedown', this.handleMouseDown_);\n    this.off('touchstart', this.handleMouseDown_);\n    this.off('keydown', this.handleKeyDown_);\n    this.off('click', this.handleClick_);\n    this.off(this.player_, 'controlsvisible', this.update_);\n    this.off(doc, 'mousemove', this.handleMouseMove_);\n    this.off(doc, 'mouseup', this.handleMouseUp_);\n    this.off(doc, 'touchmove', this.handleMouseMove_);\n    this.off(doc, 'touchend', this.handleMouseUp_);\n    this.removeAttribute('tabindex');\n    this.addClass('disabled');\n\n    if (this.playerEvent) {\n      this.off(this.player_, this.playerEvent, this.update);\n    }\n\n    this.enabled_ = false;\n  }\n  /**\n   * Create the `Slider`s DOM element.\n   *\n   * @param {string} type\n   *        Type of element to create.\n   *\n   * @param {Object} [props={}]\n   *        List of properties in Object form.\n   *\n   * @param {Object} [attributes={}]\n   *        list of attributes in Object form.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl(type, props, attributes) {\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    // Add the slider element class to all sub classes\n    props.className = props.className + ' vjs-slider';\n    props = assign({\n      tabIndex: 0\n    }, props);\n    attributes = assign({\n      'role': 'slider',\n      'aria-valuenow': 0,\n      'aria-valuemin': 0,\n      'aria-valuemax': 100,\n      'tabIndex': 0\n    }, attributes);\n    return _Component.prototype.createEl.call(this, type, props, attributes);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   * @fires Slider#slideractive\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.bar.el_.ownerDocument;\n\n    if (event.type === 'mousedown') {\n      event.preventDefault();\n    } // Do not call preventDefault() on touchstart in Chrome\n    // to avoid console warnings. Use a 'touch-action: none' style\n    // instead to prevent unintented scrolling.\n    // https://developers.google.com/web/updates/2017/01/scrolling-intervention\n\n\n    if (event.type === 'touchstart' && !IS_CHROME) {\n      event.preventDefault();\n    }\n\n    blockTextSelection();\n    this.addClass('vjs-sliding');\n    /**\n     * Triggered when the slider is in an active state\n     *\n     * @event Slider#slideractive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('slideractive');\n    this.on(doc, 'mousemove', this.handleMouseMove_);\n    this.on(doc, 'mouseup', this.handleMouseUp_);\n    this.on(doc, 'touchmove', this.handleMouseMove_);\n    this.on(doc, 'touchend', this.handleMouseUp_);\n    this.handleMouseMove(event, true);\n  }\n  /**\n   * Handle the `mousemove`, `touchmove`, and `mousedown` events on this `Slider`.\n   * The `mousemove` and `touchmove` events will only only trigger this function during\n   * `mousedown` and `touchstart`. This is due to {@link Slider#handleMouseDown} and\n   * {@link Slider#handleMouseUp}.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown`, `mousemove`, `touchstart`, or `touchmove` event that triggered\n   *        this function\n   * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false.\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {}\n  /**\n   * Handle `mouseup` or `touchend` events on the `Slider`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   * @fires Slider#sliderinactive\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp() {\n    var doc = this.bar.el_.ownerDocument;\n    unblockTextSelection();\n    this.removeClass('vjs-sliding');\n    /**\n     * Triggered when the slider is no longer in an active state.\n     *\n     * @event Slider#sliderinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('sliderinactive');\n    this.off(doc, 'mousemove', this.handleMouseMove_);\n    this.off(doc, 'mouseup', this.handleMouseUp_);\n    this.off(doc, 'touchmove', this.handleMouseMove_);\n    this.off(doc, 'touchend', this.handleMouseUp_);\n    this.update();\n  }\n  /**\n   * Update the progress bar of the `Slider`.\n   *\n   * @return {number}\n   *          The percentage of progress the progress bar represents as a\n   *          number from 0 to 1.\n   */\n  ;\n\n  _proto.update = function update() {\n    var _this2 = this;\n\n    // In VolumeBar init we have a setTimeout for update that pops and update\n    // to the end of the execution stack. The player is destroyed before then\n    // update will cause an error\n    // If there's no bar...\n    if (!this.el_ || !this.bar) {\n      return;\n    } // clamp progress between 0 and 1\n    // and only round to four decimal places, as we round to two below\n\n\n    var progress = this.getProgress();\n\n    if (progress === this.progress_) {\n      return progress;\n    }\n\n    this.progress_ = progress;\n    this.requestNamedAnimationFrame('Slider#update', function () {\n      // Set the new bar width or height\n      var sizeKey = _this2.vertical() ? 'height' : 'width'; // Convert to a percentage for css value\n\n      _this2.bar.el().style[sizeKey] = (progress * 100).toFixed(2) + '%';\n    });\n    return progress;\n  }\n  /**\n   * Get the percentage of the bar that should be filled\n   * but clamped and rounded.\n   *\n   * @return {number}\n   *         percentage filled that the slider is\n   */\n  ;\n\n  _proto.getProgress = function getProgress() {\n    return Number(clamp(this.getPercent(), 0, 1).toFixed(4));\n  }\n  /**\n   * Calculate distance for slider\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @return {number}\n   *         The current position of the Slider.\n   *         - position.x for vertical `Slider`s\n   *         - position.y for horizontal `Slider`s\n   */\n  ;\n\n  _proto.calculateDistance = function calculateDistance(event) {\n    var position = getPointerPosition(this.el_, event);\n\n    if (this.vertical()) {\n      return position.y;\n    }\n\n    return position.x;\n  }\n  /**\n   * Handle a `keydown` event on the `Slider`. Watches for left, rigth, up, and down\n   * arrow keys. This function will only be called when the slider has focus. See\n   * {@link Slider#handleFocus} and {@link Slider#handleBlur}.\n   *\n   * @param {EventTarget~Event} event\n   *        the `keydown` event that caused this function to run.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward();\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Component.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Listener for click events on slider, used to prevent clicks\n   *   from bubbling up to parent elements like button menus.\n   *\n   * @param {Object} event\n   *        Event that caused this object to run\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    event.stopPropagation();\n    event.preventDefault();\n  }\n  /**\n   * Get/set if slider is horizontal for vertical\n   *\n   * @param {boolean} [bool]\n   *        - true if slider is vertical,\n   *        - false is horizontal\n   *\n   * @return {boolean}\n   *         - true if slider is vertical, and getting\n   *         - false if the slider is horizontal, and getting\n   */\n  ;\n\n  _proto.vertical = function vertical(bool) {\n    if (bool === undefined) {\n      return this.vertical_ || false;\n    }\n\n    this.vertical_ = !!bool;\n\n    if (this.vertical_) {\n      this.addClass('vjs-slider-vertical');\n    } else {\n      this.addClass('vjs-slider-horizontal');\n    }\n  };\n\n  return Slider;\n}(Component$1);\n\nComponent$1.registerComponent('Slider', Slider);\n\nvar percentify = function percentify(time, end) {\n  return clamp(time / end * 100, 0, 100).toFixed(2) + '%';\n};\n/**\n * Shows loading progress\n *\n * @extends Component\n */\n\n\nvar LoadProgressBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LoadProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function LoadProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.partEls_ = [];\n\n    _this.on(player, 'progress', function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = LoadProgressBar.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-load-progress'\n    });\n\n    var wrapper = createEl('span', {\n      className: 'vjs-control-text'\n    });\n    var loadedText = createEl('span', {\n      textContent: this.localize('Loaded')\n    });\n    var separator = document.createTextNode(': ');\n    this.percentageEl_ = createEl('span', {\n      className: 'vjs-control-text-loaded-percentage',\n      textContent: '0%'\n    });\n    el.appendChild(wrapper);\n    wrapper.appendChild(loadedText);\n    wrapper.appendChild(separator);\n    wrapper.appendChild(this.percentageEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.partEls_ = null;\n    this.percentageEl_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Update progress bar\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `progress` event that caused this function to run.\n   *\n   * @listens Player#progress\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('LoadProgressBar#update', function () {\n      var liveTracker = _this2.player_.liveTracker;\n\n      var buffered = _this2.player_.buffered();\n\n      var duration = liveTracker && liveTracker.isLive() ? liveTracker.seekableEnd() : _this2.player_.duration();\n\n      var bufferedEnd = _this2.player_.bufferedEnd();\n\n      var children = _this2.partEls_;\n      var percent = percentify(bufferedEnd, duration);\n\n      if (_this2.percent_ !== percent) {\n        // update the width of the progress bar\n        _this2.el_.style.width = percent; // update the control-text\n\n        textContent(_this2.percentageEl_, percent);\n        _this2.percent_ = percent;\n      } // add child elements to represent the individual buffered time ranges\n\n\n      for (var i = 0; i < buffered.length; i++) {\n        var start = buffered.start(i);\n        var end = buffered.end(i);\n        var part = children[i];\n\n        if (!part) {\n          part = _this2.el_.appendChild(createEl());\n          children[i] = part;\n        } //  only update if changed\n\n\n        if (part.dataset.start === start && part.dataset.end === end) {\n          continue;\n        }\n\n        part.dataset.start = start;\n        part.dataset.end = end; // set the percent based on the width of the progress bar (bufferedEnd)\n\n        part.style.left = percentify(start, bufferedEnd);\n        part.style.width = percentify(end - start, bufferedEnd);\n      } // remove unused buffered range elements\n\n\n      for (var _i = children.length; _i > buffered.length; _i--) {\n        _this2.el_.removeChild(children[_i - 1]);\n      }\n\n      children.length = buffered.length;\n    });\n  };\n\n  return LoadProgressBar;\n}(Component$1);\n\nComponent$1.registerComponent('LoadProgressBar', LoadProgressBar);\n\n/**\n * Time tooltips display a time above the progress bar.\n *\n * @extends Component\n */\n\nvar TimeTooltip = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(TimeTooltip, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TimeTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the time tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = TimeTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-time-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint, content) {\n    var tooltipRect = findPosition(this.el_);\n    var playerRect = getBoundingClientRect(this.player_.el());\n    var seekBarPointPx = seekBarRect.width * seekBarPoint; // do nothing if either rect isn't available\n    // for example, if the player isn't in the DOM for testing\n\n    if (!playerRect || !tooltipRect) {\n      return;\n    } // This is the space left of the `seekBarPoint` available within the bounds\n    // of the player. We calculate any gap between the left edge of the player\n    // and the left edge of the `SeekBar` and add the number of pixels in the\n    // `SeekBar` before hitting the `seekBarPoint`\n\n\n    var spaceLeftOfPoint = seekBarRect.left - playerRect.left + seekBarPointPx; // This is the space right of the `seekBarPoint` available within the bounds\n    // of the player. We calculate the number of pixels from the `seekBarPoint`\n    // to the right edge of the `SeekBar` and add to that any gap between the\n    // right edge of the `SeekBar` and the player.\n\n    var spaceRightOfPoint = seekBarRect.width - seekBarPointPx + (playerRect.right - seekBarRect.right); // This is the number of pixels by which the tooltip will need to be pulled\n    // further to the right to center it over the `seekBarPoint`.\n\n    var pullTooltipBy = tooltipRect.width / 2; // Adjust the `pullTooltipBy` distance to the left or right depending on\n    // the results of the space calculations above.\n\n    if (spaceLeftOfPoint < pullTooltipBy) {\n      pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n    } else if (spaceRightOfPoint < pullTooltipBy) {\n      pullTooltipBy = spaceRightOfPoint;\n    } // Due to the imprecision of decimal/ratio based calculations and varying\n    // rounding behaviors, there are cases where the spacing adjustment is off\n    // by a pixel or two. This adds insurance to these calculations.\n\n\n    if (pullTooltipBy < 0) {\n      pullTooltipBy = 0;\n    } else if (pullTooltipBy > tooltipRect.width) {\n      pullTooltipBy = tooltipRect.width;\n    } // prevent small width fluctuations within 0.4px from\n    // changing the value below.\n    // This really helps for live to prevent the play\n    // progress time tooltip from jittering\n\n\n    pullTooltipBy = Math.round(pullTooltipBy);\n    this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    this.write(content);\n  }\n  /**\n   * Write the time to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted time for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the time tooltip relative to the `SeekBar`.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   *\n   * @param {number} time\n   *        The time to update the tooltip to, not used during live playback\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateTime = function updateTime(seekBarRect, seekBarPoint, time, cb) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('TimeTooltip#updateTime', function () {\n      var content;\n\n      var duration = _this2.player_.duration();\n\n      if (_this2.player_.liveTracker && _this2.player_.liveTracker.isLive()) {\n        var liveWindow = _this2.player_.liveTracker.liveWindow();\n\n        var secondsBehind = liveWindow - seekBarPoint * liveWindow;\n        content = (secondsBehind < 1 ? '' : '-') + formatTime(secondsBehind, liveWindow);\n      } else {\n        content = formatTime(time, duration);\n      }\n\n      _this2.update(seekBarRect, seekBarPoint, content);\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return TimeTooltip;\n}(Component$1);\n\nComponent$1.registerComponent('TimeTooltip', TimeTooltip);\n\n/**\n * Used by {@link SeekBar} to display media playback progress as part of the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar PlayProgressBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(PlayProgressBar, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlayProgressBar(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlayProgressBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-play-progress vjs-slider-bar'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var timeTooltip = this.getChild('timeTooltip');\n\n    if (!timeTooltip) {\n      return;\n    }\n\n    var time = this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n    timeTooltip.updateTime(seekBarRect, seekBarPoint, time);\n  };\n\n  return PlayProgressBar;\n}(Component$1);\n/**\n * Default options for {@link PlayProgressBar}.\n *\n * @type {Object}\n * @private\n */\n\n\nPlayProgressBar.prototype.options_ = {\n  children: []\n}; // Time tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  PlayProgressBar.prototype.options_.children.push('timeTooltip');\n}\n\nComponent$1.registerComponent('PlayProgressBar', PlayProgressBar);\n\n/**\n * The {@link MouseTimeDisplay} component tracks mouse movement over the\n * {@link ProgressControl}. It displays an indicator and a {@link TimeTooltip}\n * indicating the time which is represented by a given point in the\n * {@link ProgressControl}.\n *\n * @extends Component\n */\n\nvar MouseTimeDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MouseTimeDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseTimeDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseTimeDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enqueues updates to its own DOM as well as the DOM of its\n   * {@link TimeTooltip} child.\n   *\n   * @param {Object} seekBarRect\n   *        The `ClientRect` for the {@link SeekBar} element.\n   *\n   * @param {number} seekBarPoint\n   *        A number from 0 to 1, representing a horizontal reference point\n   *        from the left edge of the {@link SeekBar}\n   */\n  ;\n\n  _proto.update = function update(seekBarRect, seekBarPoint) {\n    var _this2 = this;\n\n    var time = seekBarPoint * this.player_.duration();\n    this.getChild('timeTooltip').updateTime(seekBarRect, seekBarPoint, time, function () {\n      _this2.el_.style.left = seekBarRect.width * seekBarPoint + \"px\";\n    });\n  };\n\n  return MouseTimeDisplay;\n}(Component$1);\n/**\n * Default options for `MouseTimeDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseTimeDisplay.prototype.options_ = {\n  children: ['timeTooltip']\n};\nComponent$1.registerComponent('MouseTimeDisplay', MouseTimeDisplay);\n\nvar STEP_SECONDS = 5; // The multiplier of STEP_SECONDS that PgUp/PgDown move the timeline.\n\nvar PAGE_KEY_MULTIPLIER = 12;\n/**\n * Seek bar and container for the progress bars. Uses {@link PlayProgressBar}\n * as its `bar`.\n *\n * @extends Slider\n */\n\nvar SeekBar = /*#__PURE__*/function (_Slider) {\n  _inheritsLoose(SeekBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function SeekBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.setEventHandlers_();\n\n    return _this;\n  }\n  /**\n   * Sets the event handlers\n   *\n   * @private\n   */\n\n\n  var _proto = SeekBar.prototype;\n\n  _proto.setEventHandlers_ = function setEventHandlers_() {\n    var _this2 = this;\n\n    this.update_ = bind(this, this.update);\n    this.update = throttle(this.update_, UPDATE_REFRESH_INTERVAL);\n    this.on(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n\n    if (this.player_.liveTracker) {\n      this.on(this.player_.liveTracker, 'liveedgechange', this.update);\n    } // when playing, let's ensure we smoothly update the play progress bar\n    // via an interval\n\n\n    this.updateInterval = null;\n\n    this.enableIntervalHandler_ = function (e) {\n      return _this2.enableInterval_(e);\n    };\n\n    this.disableIntervalHandler_ = function (e) {\n      return _this2.disableInterval_(e);\n    };\n\n    this.on(this.player_, ['playing'], this.enableIntervalHandler_);\n    this.on(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.on(document, 'visibilitychange', this.toggleVisibility_);\n    }\n  };\n\n  _proto.toggleVisibility_ = function toggleVisibility_(e) {\n    if (document.visibilityState === 'hidden') {\n      this.cancelNamedAnimationFrame('SeekBar#update');\n      this.cancelNamedAnimationFrame('Slider#update');\n      this.disableInterval_(e);\n    } else {\n      if (!this.player_.ended() && !this.player_.paused()) {\n        this.enableInterval_();\n      } // we just switched back to the page and someone may be looking, so, update ASAP\n\n\n      this.update();\n    }\n  };\n\n  _proto.enableInterval_ = function enableInterval_() {\n    if (this.updateInterval) {\n      return;\n    }\n\n    this.updateInterval = this.setInterval(this.update, UPDATE_REFRESH_INTERVAL);\n  };\n\n  _proto.disableInterval_ = function disableInterval_(e) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive() && e && e.type !== 'ended') {\n      return;\n    }\n\n    if (!this.updateInterval) {\n      return;\n    }\n\n    this.clearInterval(this.updateInterval);\n    this.updateInterval = null;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-holder'\n    }, {\n      'aria-label': this.localize('Progress Bar')\n    });\n  }\n  /**\n   * This function updates the play progress bar and accessibility\n   * attributes to whatever is passed in.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `timeupdate` or `ended` event that caused this to run.\n   *\n   * @listens Player#timeupdate\n   *\n   * @return {number}\n   *          The current percent at a number from 0-1\n   */\n  ;\n\n  _proto.update = function update(event) {\n    var _this3 = this;\n\n    // ignore updates while the tab is hidden\n    if (document.visibilityState === 'hidden') {\n      return;\n    }\n\n    var percent = _Slider.prototype.update.call(this);\n\n    this.requestNamedAnimationFrame('SeekBar#update', function () {\n      var currentTime = _this3.player_.ended() ? _this3.player_.duration() : _this3.getCurrentTime_();\n      var liveTracker = _this3.player_.liveTracker;\n\n      var duration = _this3.player_.duration();\n\n      if (liveTracker && liveTracker.isLive()) {\n        duration = _this3.player_.liveTracker.liveCurrentTime();\n      }\n\n      if (_this3.percent_ !== percent) {\n        // machine readable value of progress bar (percentage complete)\n        _this3.el_.setAttribute('aria-valuenow', (percent * 100).toFixed(2));\n\n        _this3.percent_ = percent;\n      }\n\n      if (_this3.currentTime_ !== currentTime || _this3.duration_ !== duration) {\n        // human readable value of progress bar (time complete)\n        _this3.el_.setAttribute('aria-valuetext', _this3.localize('progress bar timing: currentTime={1} duration={2}', [formatTime(currentTime, duration), formatTime(duration, duration)], '{1} of {2}'));\n\n        _this3.currentTime_ = currentTime;\n        _this3.duration_ = duration;\n      } // update the progress bar time tooltip with the current time\n\n\n      if (_this3.bar) {\n        _this3.bar.update(getBoundingClientRect(_this3.el()), _this3.getProgress());\n      }\n    });\n    return percent;\n  }\n  /**\n   * Prevent liveThreshold from causing seeks to seem like they\n   * are not happening from a user perspective.\n   *\n   * @param {number} ct\n   *        current time to seek to\n   */\n  ;\n\n  _proto.userSeek_ = function userSeek_(ct) {\n    if (this.player_.liveTracker && this.player_.liveTracker.isLive()) {\n      this.player_.liveTracker.nextSeekedFromUser();\n    }\n\n    this.player_.currentTime(ct);\n  }\n  /**\n   * Get the value of current time but allows for smooth scrubbing,\n   * when player can't keep up.\n   *\n   * @return {number}\n   *         The current time value to display\n   *\n   * @private\n   */\n  ;\n\n  _proto.getCurrentTime_ = function getCurrentTime_() {\n    return this.player_.scrubbing() ? this.player_.getCache().currentTime : this.player_.currentTime();\n  }\n  /**\n   * Get the percentage of media played so far.\n   *\n   * @return {number}\n   *         The percentage of media played so far (0 to 1).\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    var currentTime = this.getCurrentTime_();\n    var percent;\n    var liveTracker = this.player_.liveTracker;\n\n    if (liveTracker && liveTracker.isLive()) {\n      percent = (currentTime - liveTracker.seekableStart()) / liveTracker.liveWindow(); // prevent the percent from changing at the live edge\n\n      if (liveTracker.atLiveEdge()) {\n        percent = 1;\n      }\n    } else {\n      percent = currentTime / this.player_.duration();\n    }\n\n    return percent;\n  }\n  /**\n   * Handle mouse down on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    } // Stop event propagation to prevent double fire in progress-control.js\n\n\n    event.stopPropagation();\n    this.videoWasPlaying = !this.player_.paused();\n    this.player_.pause();\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle mouse move on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this to run.\n   * @param {boolean} mouseDown this is a flag that should be set to true if `handleMouseMove` is called directly. It allows us to skip things that should not happen if coming from mouse down but should happen on regular mouse move handler. Defaults to false\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event, mouseDown) {\n    if (mouseDown === void 0) {\n      mouseDown = false;\n    }\n\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    if (!mouseDown && !this.player_.scrubbing()) {\n      this.player_.scrubbing(true);\n    }\n\n    var newTime;\n    var distance = this.calculateDistance(event);\n    var liveTracker = this.player_.liveTracker;\n\n    if (!liveTracker || !liveTracker.isLive()) {\n      newTime = distance * this.player_.duration(); // Don't let video end while scrubbing.\n\n      if (newTime === this.player_.duration()) {\n        newTime = newTime - 0.1;\n      }\n    } else {\n      if (distance >= 0.99) {\n        liveTracker.seekToLiveEdge();\n        return;\n      }\n\n      var seekableStart = liveTracker.seekableStart();\n      var seekableEnd = liveTracker.liveCurrentTime();\n      newTime = seekableStart + distance * liveTracker.liveWindow(); // Don't let video end while scrubbing.\n\n      if (newTime >= seekableEnd) {\n        newTime = seekableEnd;\n      } // Compensate for precision differences so that currentTime is not less\n      // than seekable start\n\n\n      if (newTime <= seekableStart) {\n        newTime = seekableStart + 0.1;\n      } // On android seekableEnd can be Infinity sometimes,\n      // this will cause newTime to be Infinity, which is\n      // not a valid currentTime.\n\n\n      if (newTime === Infinity) {\n        return;\n      }\n    } // Set new time (tell player to seek to new time)\n\n\n    this.userSeek_(newTime);\n  };\n\n  _proto.enable = function enable() {\n    _Slider.prototype.enable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.show();\n  };\n\n  _proto.disable = function disable() {\n    _Slider.prototype.disable.call(this);\n\n    var mouseTimeDisplay = this.getChild('mouseTimeDisplay');\n\n    if (!mouseTimeDisplay) {\n      return;\n    }\n\n    mouseTimeDisplay.hide();\n  }\n  /**\n   * Handle mouse up on seek bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseup` event that caused this to run.\n   *\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    _Slider.prototype.handleMouseUp.call(this, event); // Stop event propagation to prevent double fire in progress-control.js\n\n\n    if (event) {\n      event.stopPropagation();\n    }\n\n    this.player_.scrubbing(false);\n    /**\n     * Trigger timeupdate because we're done seeking and the time has changed.\n     * This is particularly useful for if the player is paused to time the time displays.\n     *\n     * @event Tech#timeupdate\n     * @type {EventTarget~Event}\n     */\n\n    this.player_.trigger({\n      type: 'timeupdate',\n      target: this,\n      manuallyTriggered: true\n    });\n\n    if (this.videoWasPlaying) {\n      silencePromise(this.player_.play());\n    } else {\n      // We're done seeking and the time has changed.\n      // If the player is paused, make sure we display the correct time on the seek bar.\n      this.update_();\n    }\n  }\n  /**\n   * Move more quickly fast forward for keyboard-only users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.userSeek_(this.player_.currentTime() + STEP_SECONDS);\n  }\n  /**\n   * Move more quickly rewind for keyboard-only users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.userSeek_(this.player_.currentTime() - STEP_SECONDS);\n  }\n  /**\n   * Toggles the playback state of the player\n   * This gets called when enter or space is used on the seekbar\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called\n   *\n   */\n  ;\n\n  _proto.handleAction = function handleAction(event) {\n    if (this.player_.paused()) {\n      this.player_.play();\n    } else {\n      this.player_.pause();\n    }\n  }\n  /**\n   * Called when this SeekBar has focus and a key gets pressed down.\n   * Supports the following keys:\n   *\n   *   Space or Enter key fire a click event\n   *   Home key moves to start of the timeline\n   *   End key moves to end of the timeline\n   *   Digit \"0\" through \"9\" keys move to 0%, 10% ... 80%, 90% of the timeline\n   *   PageDown key moves back a larger step than ArrowDown\n   *   PageUp key moves forward a large step\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var liveTracker = this.player_.liveTracker;\n\n    if (keycode.isEventKey(event, 'Space') || keycode.isEventKey(event, 'Enter')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.handleAction(event);\n    } else if (keycode.isEventKey(event, 'Home')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(0);\n    } else if (keycode.isEventKey(event, 'End')) {\n      event.preventDefault();\n      event.stopPropagation();\n\n      if (liveTracker && liveTracker.isLive()) {\n        this.userSeek_(liveTracker.liveCurrentTime());\n      } else {\n        this.userSeek_(this.player_.duration());\n      }\n    } else if (/^[0-9]$/.test(keycode(event))) {\n      event.preventDefault();\n      event.stopPropagation();\n      var gotoFraction = (keycode.codes[keycode(event)] - keycode.codes['0']) * 10.0 / 100.0;\n\n      if (liveTracker && liveTracker.isLive()) {\n        this.userSeek_(liveTracker.seekableStart() + liveTracker.liveWindow() * gotoFraction);\n      } else {\n        this.userSeek_(this.player_.duration() * gotoFraction);\n      }\n    } else if (keycode.isEventKey(event, 'PgDn')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(this.player_.currentTime() - STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else if (keycode.isEventKey(event, 'PgUp')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.userSeek_(this.player_.currentTime() + STEP_SECONDS * PAGE_KEY_MULTIPLIER);\n    } else {\n      // Pass keydown handling up for unsupported keys\n      _Slider.prototype.handleKeyDown.call(this, event);\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.disableInterval_();\n    this.off(this.player_, ['ended', 'durationchange', 'timeupdate'], this.update);\n\n    if (this.player_.liveTracker) {\n      this.off(this.player_.liveTracker, 'liveedgechange', this.update);\n    }\n\n    this.off(this.player_, ['playing'], this.enableIntervalHandler_);\n    this.off(this.player_, ['ended', 'pause', 'waiting'], this.disableIntervalHandler_); // we don't need to update the play progress if the document is hidden,\n    // also, this causes the CPU to spike and eventually crash the page on IE11.\n\n    if ('hidden' in document && 'visibilityState' in document) {\n      this.off(document, 'visibilitychange', this.toggleVisibility_);\n    }\n\n    _Slider.prototype.dispose.call(this);\n  };\n\n  return SeekBar;\n}(Slider);\n/**\n * Default options for the `SeekBar`\n *\n * @type {Object}\n * @private\n */\n\n\nSeekBar.prototype.options_ = {\n  children: ['loadProgressBar', 'playProgressBar'],\n  barName: 'playProgressBar'\n}; // MouseTimeDisplay tooltips should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  SeekBar.prototype.options_.children.splice(1, 0, 'mouseTimeDisplay');\n}\n\nComponent$1.registerComponent('SeekBar', SeekBar);\n\n/**\n * The Progress Control component contains the seek bar, load progress,\n * and play progress.\n *\n * @extends Component\n */\n\nvar ProgressControl = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ProgressControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ProgressControl(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.handleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n    _this.throttledHandleMouseSeek = throttle(bind(_assertThisInitialized(_this), _this.handleMouseSeek), UPDATE_REFRESH_INTERVAL);\n\n    _this.handleMouseUpHandler_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.handleMouseDownHandler_ = function (e) {\n      return _this.handleMouseDown(e);\n    };\n\n    _this.enable();\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = ProgressControl.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-progress-control vjs-control'\n    });\n  }\n  /**\n   * When the mouse moves over the `ProgressControl`, the pointer position\n   * gets passed down to the `MouseTimeDisplay` component.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (!seekBar) {\n      return;\n    }\n\n    var playProgressBar = seekBar.getChild('playProgressBar');\n    var mouseTimeDisplay = seekBar.getChild('mouseTimeDisplay');\n\n    if (!playProgressBar && !mouseTimeDisplay) {\n      return;\n    }\n\n    var seekBarEl = seekBar.el();\n    var seekBarRect = findPosition(seekBarEl);\n    var seekBarPoint = getPointerPosition(seekBarEl, event).x; // The default skin has a gap on either side of the `SeekBar`. This means\n    // that it's possible to trigger this behavior outside the boundaries of\n    // the `SeekBar`. This ensures we stay within it at all times.\n\n    seekBarPoint = clamp(seekBarPoint, 0, 1);\n\n    if (mouseTimeDisplay) {\n      mouseTimeDisplay.update(seekBarRect, seekBarPoint);\n    }\n\n    if (playProgressBar) {\n      playProgressBar.update(seekBarRect, seekBar.getProgress());\n    }\n  }\n  /**\n   * A throttled version of the {@link ProgressControl#handleMouseSeek} listener.\n   *\n   * @method ProgressControl#throttledHandleMouseSeek\n   * @param {EventTarget~Event} event\n   *        The `mousemove` event that caused this function to run.\n   *\n   * @listen mousemove\n   * @listen touchmove\n   */\n\n  /**\n   * Handle `mousemove` or `touchmove` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousemove\n   * @listens touchmove\n   */\n  ;\n\n  _proto.handleMouseSeek = function handleMouseSeek(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseMove(event);\n    }\n  }\n  /**\n   * Are controls are currently enabled for this progress control.\n   *\n   * @return {boolean}\n   *         true if controls are enabled, false otherwise\n   */\n  ;\n\n  _proto.enabled = function enabled() {\n    return this.enabled_;\n  }\n  /**\n   * Disable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.children().forEach(function (child) {\n      return child.disable && child.disable();\n    });\n\n    if (!this.enabled()) {\n      return;\n    }\n\n    this.off(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n    this.off(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeListenersAddedOnMousedownAndTouchstart();\n    this.addClass('disabled');\n    this.enabled_ = false; // Restore normal playback state if controls are disabled while scrubbing\n\n    if (this.player_.scrubbing()) {\n      var seekBar = this.getChild('seekBar');\n      this.player_.scrubbing(false);\n\n      if (seekBar.videoWasPlaying) {\n        silencePromise(this.player_.play());\n      }\n    }\n  }\n  /**\n   * Enable all controls on the progress control and its children\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.children().forEach(function (child) {\n      return child.enable && child.enable();\n    });\n\n    if (this.enabled()) {\n      return;\n    }\n\n    this.on(['mousedown', 'touchstart'], this.handleMouseDownHandler_);\n    this.on(this.el_, 'mousemove', this.handleMouseMove);\n    this.removeClass('disabled');\n    this.enabled_ = true;\n  }\n  /**\n   * Cleanup listeners after the user finishes interacting with the progress controls\n   */\n  ;\n\n  _proto.removeListenersAddedOnMousedownAndTouchstart = function removeListenersAddedOnMousedownAndTouchstart() {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.off(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.off(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseDown(event);\n    }\n\n    this.on(doc, 'mousemove', this.throttledHandleMouseSeek);\n    this.on(doc, 'touchmove', this.throttledHandleMouseSeek);\n    this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.on(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `ProgressControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var seekBar = this.getChild('seekBar');\n\n    if (seekBar) {\n      seekBar.handleMouseUp(event);\n    }\n\n    this.removeListenersAddedOnMousedownAndTouchstart();\n  };\n\n  return ProgressControl;\n}(Component$1);\n/**\n * Default options for `ProgressControl`\n *\n * @type {Object}\n * @private\n */\n\n\nProgressControl.prototype.options_ = {\n  children: ['seekBar']\n};\nComponent$1.registerComponent('ProgressControl', ProgressControl);\n\n/**\n * Toggle Picture-in-Picture mode\n *\n * @extends Button\n */\n\nvar PictureInPictureToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(PictureInPictureToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  function PictureInPictureToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], function (e) {\n      return _this.handlePictureInPictureChange(e);\n    });\n\n    _this.on(player, ['disablepictureinpicturechanged', 'loadedmetadata'], function (e) {\n      return _this.handlePictureInPictureEnabledChange(e);\n    });\n\n    _this.on(player, ['loadedmetadata', 'audioonlymodechange', 'audiopostermodechange'], function () {\n      // This audio detection will not detect HLS or DASH audio-only streams because there was no reliable way to detect them at the time\n      var isSourceAudio = player.currentType().substring(0, 5) === 'audio';\n\n      if (isSourceAudio || player.audioPosterMode() || player.audioOnlyMode()) {\n        if (player.isInPictureInPicture()) {\n          player.exitPictureInPicture();\n        }\n\n        _this.hide();\n      } else {\n        _this.show();\n      }\n    }); // TODO: Deactivate button on player emptied event.\n\n\n    _this.disable();\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = PictureInPictureToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-picture-in-picture-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Enables or disables button based on document.pictureInPictureEnabled property value\n   * or on value returned by player.disablePictureInPicture() method.\n   */\n  ;\n\n  _proto.handlePictureInPictureEnabledChange = function handlePictureInPictureEnabledChange() {\n    if (document.pictureInPictureEnabled && this.player_.disablePictureInPicture() === false) {\n      this.enable();\n    } else {\n      this.disable();\n    }\n  }\n  /**\n   * Handles enterpictureinpicture and leavepictureinpicture on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#enterpictureinpicture} or {@link Player#leavepictureinpicture} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#enterpictureinpicture\n   * @listens Player#leavepictureinpicture\n   */\n  ;\n\n  _proto.handlePictureInPictureChange = function handlePictureInPictureChange(event) {\n    if (this.player_.isInPictureInPicture()) {\n      this.controlText('Exit Picture-in-Picture');\n    } else {\n      this.controlText('Picture-in-Picture');\n    }\n\n    this.handlePictureInPictureEnabledChange();\n  }\n  /**\n   * This gets called when an `PictureInPictureToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isInPictureInPicture()) {\n      this.player_.requestPictureInPicture();\n    } else {\n      this.player_.exitPictureInPicture();\n    }\n  };\n\n  return PictureInPictureToggle;\n}(Button);\n/**\n * The text that should display over the `PictureInPictureToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPictureInPictureToggle.prototype.controlText_ = 'Picture-in-Picture';\nComponent$1.registerComponent('PictureInPictureToggle', PictureInPictureToggle);\n\n/**\n * Toggle fullscreen video\n *\n * @extends Button\n */\n\nvar FullscreenToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(FullscreenToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function FullscreenToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this;\n\n    _this.on(player, 'fullscreenchange', function (e) {\n      return _this.handleFullscreenChange(e);\n    });\n\n    if (document[player.fsApi_.fullscreenEnabled] === false) {\n      _this.disable();\n    }\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = FullscreenToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-fullscreen-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Handles fullscreenchange on the player and change control text accordingly.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#fullscreenchange} event that caused this function to be\n   *        called.\n   *\n   * @listens Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleFullscreenChange = function handleFullscreenChange(event) {\n    if (this.player_.isFullscreen()) {\n      this.controlText('Non-Fullscreen');\n    } else {\n      this.controlText('Fullscreen');\n    }\n  }\n  /**\n   * This gets called when an `FullscreenToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (!this.player_.isFullscreen()) {\n      this.player_.requestFullscreen();\n    } else {\n      this.player_.exitFullscreen();\n    }\n  };\n\n  return FullscreenToggle;\n}(Button);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nFullscreenToggle.prototype.controlText_ = 'Fullscreen';\nComponent$1.registerComponent('FullscreenToggle', FullscreenToggle);\n\n/**\n * Check if volume control is supported and if it isn't hide the\n * `Component` that was passed  using the `vjs-hidden` class.\n *\n * @param {Component} self\n *        The component that should be hidden if volume is unsupported\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkVolumeSupport = function checkVolumeSupport(self, player) {\n  // hide volume controls when they're not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresVolumeControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresVolumeControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * Shows volume level\n *\n * @extends Component\n */\n\nvar VolumeLevel = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeLevel, _Component);\n\n  function VolumeLevel() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = VolumeLevel.prototype;\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-level'\n    });\n\n    el.appendChild(_Component.prototype.createEl.call(this, 'span', {\n      className: 'vjs-control-text'\n    }));\n    return el;\n  };\n\n  return VolumeLevel;\n}(Component$1);\n\nComponent$1.registerComponent('VolumeLevel', VolumeLevel);\n\n/**\n * Volume level tooltips display a volume above or side by side the volume bar.\n *\n * @extends Component\n */\n\nvar VolumeLevelTooltip = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeLevelTooltip, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeLevelTooltip(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the volume tooltip DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeLevelTooltip.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-tooltip'\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Updates the position of the tooltip relative to the `VolumeBar` and\n   * its content text.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   */\n  ;\n\n  _proto.update = function update(rangeBarRect, rangeBarPoint, vertical, content) {\n    if (!vertical) {\n      var tooltipRect = getBoundingClientRect(this.el_);\n      var playerRect = getBoundingClientRect(this.player_.el());\n      var volumeBarPointPx = rangeBarRect.width * rangeBarPoint;\n\n      if (!playerRect || !tooltipRect) {\n        return;\n      }\n\n      var spaceLeftOfPoint = rangeBarRect.left - playerRect.left + volumeBarPointPx;\n      var spaceRightOfPoint = rangeBarRect.width - volumeBarPointPx + (playerRect.right - rangeBarRect.right);\n      var pullTooltipBy = tooltipRect.width / 2;\n\n      if (spaceLeftOfPoint < pullTooltipBy) {\n        pullTooltipBy += pullTooltipBy - spaceLeftOfPoint;\n      } else if (spaceRightOfPoint < pullTooltipBy) {\n        pullTooltipBy = spaceRightOfPoint;\n      }\n\n      if (pullTooltipBy < 0) {\n        pullTooltipBy = 0;\n      } else if (pullTooltipBy > tooltipRect.width) {\n        pullTooltipBy = tooltipRect.width;\n      }\n\n      this.el_.style.right = \"-\" + pullTooltipBy + \"px\";\n    }\n\n    this.write(content + \"%\");\n  }\n  /**\n   * Write the volume to the tooltip DOM element.\n   *\n   * @param {string} content\n   *        The formatted volume for the tooltip.\n   */\n  ;\n\n  _proto.write = function write(content) {\n    textContent(this.el_, content);\n  }\n  /**\n   * Updates the position of the volume tooltip relative to the `VolumeBar`.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   * @param {number} volume\n   *        The volume level to update the tooltip to\n   *\n   * @param {Function} cb\n   *        A function that will be called during the request animation frame\n   *        for tooltips that need to do additional animations from the default\n   */\n  ;\n\n  _proto.updateVolume = function updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, cb) {\n    var _this2 = this;\n\n    this.requestNamedAnimationFrame('VolumeLevelTooltip#updateVolume', function () {\n      _this2.update(rangeBarRect, rangeBarPoint, vertical, volume.toFixed(0));\n\n      if (cb) {\n        cb();\n      }\n    });\n  };\n\n  return VolumeLevelTooltip;\n}(Component$1);\n\nComponent$1.registerComponent('VolumeLevelTooltip', VolumeLevelTooltip);\n\n/**\n * The {@link MouseVolumeLevelDisplay} component tracks mouse movement over the\n * {@link VolumeControl}. It displays an indicator and a {@link VolumeLevelTooltip}\n * indicating the volume level which is represented by a given point in the\n * {@link VolumeBar}.\n *\n * @extends Component\n */\n\nvar MouseVolumeLevelDisplay = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MouseVolumeLevelDisplay, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The {@link Player} that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MouseVolumeLevelDisplay(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n    _this.update = throttle(bind(_assertThisInitialized(_this), _this.update), UPDATE_REFRESH_INTERVAL);\n    return _this;\n  }\n  /**\n   * Create the DOM element for this class.\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = MouseVolumeLevelDisplay.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-mouse-display'\n    });\n  }\n  /**\n   * Enquires updates to its own DOM as well as the DOM of its\n   * {@link VolumeLevelTooltip} child.\n   *\n   * @param {Object} rangeBarRect\n   *        The `ClientRect` for the {@link VolumeBar} element.\n   *\n   * @param {number} rangeBarPoint\n   *        A number from 0 to 1, representing a horizontal/vertical reference point\n   *        from the left edge of the {@link VolumeBar}\n   *\n   * @param {boolean} vertical\n   *        Referees to the Volume control position\n   *        in the control bar{@link VolumeControl}\n   *\n   */\n  ;\n\n  _proto.update = function update(rangeBarRect, rangeBarPoint, vertical) {\n    var _this2 = this;\n\n    var volume = 100 * rangeBarPoint;\n    this.getChild('volumeLevelTooltip').updateVolume(rangeBarRect, rangeBarPoint, vertical, volume, function () {\n      if (vertical) {\n        _this2.el_.style.bottom = rangeBarRect.height * rangeBarPoint + \"px\";\n      } else {\n        _this2.el_.style.left = rangeBarRect.width * rangeBarPoint + \"px\";\n      }\n    });\n  };\n\n  return MouseVolumeLevelDisplay;\n}(Component$1);\n/**\n * Default options for `MouseVolumeLevelDisplay`\n *\n * @type {Object}\n * @private\n */\n\n\nMouseVolumeLevelDisplay.prototype.options_ = {\n  children: ['volumeLevelTooltip']\n};\nComponent$1.registerComponent('MouseVolumeLevelDisplay', MouseVolumeLevelDisplay);\n\n/**\n * The bar that contains the volume level and can be clicked on to adjust the level\n *\n * @extends Slider\n */\n\nvar VolumeBar = /*#__PURE__*/function (_Slider) {\n  _inheritsLoose(VolumeBar, _Slider);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function VolumeBar(player, options) {\n    var _this;\n\n    _this = _Slider.call(this, player, options) || this;\n\n    _this.on('slideractive', function (e) {\n      return _this.updateLastVolume_(e);\n    });\n\n    _this.on(player, 'volumechange', function (e) {\n      return _this.updateARIAAttributes(e);\n    });\n\n    player.ready(function () {\n      return _this.updateARIAAttributes();\n    });\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeBar.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Slider.prototype.createEl.call(this, 'div', {\n      className: 'vjs-volume-bar vjs-slider-bar'\n    }, {\n      'aria-label': this.localize('Volume Level'),\n      'aria-live': 'polite'\n    });\n  }\n  /**\n   * Handle mouse down on volume bar\n   *\n   * @param {EventTarget~Event} event\n   *        The `mousedown` event that caused this to run.\n   *\n   * @listens mousedown\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    _Slider.prototype.handleMouseDown.call(this, event);\n  }\n  /**\n   * Handle movement events on the {@link VolumeMenuButton}.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run.\n   *\n   * @listens mousemove\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    var mouseVolumeLevelDisplay = this.getChild('mouseVolumeLevelDisplay');\n\n    if (mouseVolumeLevelDisplay) {\n      var volumeBarEl = this.el();\n      var volumeBarRect = getBoundingClientRect(volumeBarEl);\n      var vertical = this.vertical();\n      var volumeBarPoint = getPointerPosition(volumeBarEl, event);\n      volumeBarPoint = vertical ? volumeBarPoint.y : volumeBarPoint.x; // The default skin has a gap on either side of the `VolumeBar`. This means\n      // that it's possible to trigger this behavior outside the boundaries of\n      // the `VolumeBar`. This ensures we stay within it at all times.\n\n      volumeBarPoint = clamp(volumeBarPoint, 0, 1);\n      mouseVolumeLevelDisplay.update(volumeBarRect, volumeBarPoint, vertical);\n    }\n\n    if (!isSingleLeftClick(event)) {\n      return;\n    }\n\n    this.checkMuted();\n    this.player_.volume(this.calculateDistance(event));\n  }\n  /**\n   * If the player is muted unmute it.\n   */\n  ;\n\n  _proto.checkMuted = function checkMuted() {\n    if (this.player_.muted()) {\n      this.player_.muted(false);\n    }\n  }\n  /**\n   * Get percent of volume level\n   *\n   * @return {number}\n   *         Volume level percent as a decimal number.\n   */\n  ;\n\n  _proto.getPercent = function getPercent() {\n    if (this.player_.muted()) {\n      return 0;\n    }\n\n    return this.player_.volume();\n  }\n  /**\n   * Increase volume level for keyboard users\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() + 0.1);\n  }\n  /**\n   * Decrease volume level for keyboard users\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    this.checkMuted();\n    this.player_.volume(this.player_.volume() - 0.1);\n  }\n  /**\n   * Update ARIA accessibility attributes\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `volumechange` event that caused this function to run.\n   *\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes(event) {\n    var ariaValue = this.player_.muted() ? 0 : this.volumeAsPercentage_();\n    this.el_.setAttribute('aria-valuenow', ariaValue);\n    this.el_.setAttribute('aria-valuetext', ariaValue + '%');\n  }\n  /**\n   * Returns the current value of the player volume as a percentage\n   *\n   * @private\n   */\n  ;\n\n  _proto.volumeAsPercentage_ = function volumeAsPercentage_() {\n    return Math.round(this.player_.volume() * 100);\n  }\n  /**\n   * When user starts dragging the VolumeBar, store the volume and listen for\n   * the end of the drag. When the drag ends, if the volume was set to zero,\n   * set lastVolume to the stored volume.\n   *\n   * @listens slideractive\n   * @private\n   */\n  ;\n\n  _proto.updateLastVolume_ = function updateLastVolume_() {\n    var _this2 = this;\n\n    var volumeBeforeDrag = this.player_.volume();\n    this.one('sliderinactive', function () {\n      if (_this2.player_.volume() === 0) {\n        _this2.player_.lastVolume_(volumeBeforeDrag);\n      }\n    });\n  };\n\n  return VolumeBar;\n}(Slider);\n/**\n * Default options for the `VolumeBar`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeBar.prototype.options_ = {\n  children: ['volumeLevel'],\n  barName: 'volumeLevel'\n}; // MouseVolumeLevelDisplay tooltip should not be added to a player on mobile devices\n\nif (!IS_IOS && !IS_ANDROID) {\n  VolumeBar.prototype.options_.children.splice(0, 0, 'mouseVolumeLevelDisplay');\n}\n/**\n * Call the update event for this Slider when this event happens on the player.\n *\n * @type {string}\n */\n\n\nVolumeBar.prototype.playerEvent = 'volumechange';\nComponent$1.registerComponent('VolumeBar', VolumeBar);\n\n/**\n * The component for controlling the volume level\n *\n * @extends Component\n */\n\nvar VolumeControl = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumeControl, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumeControl(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.vertical = options.vertical || false; // Pass the vertical option down to the VolumeBar if\n    // the VolumeBar is turned on.\n\n    if (typeof options.volumeBar === 'undefined' || isPlain(options.volumeBar)) {\n      options.volumeBar = options.volumeBar || {};\n      options.volumeBar.vertical = options.vertical;\n    }\n\n    _this = _Component.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkVolumeSupport(_assertThisInitialized(_this), player);\n    _this.throttledHandleMouseMove = throttle(bind(_assertThisInitialized(_this), _this.handleMouseMove), UPDATE_REFRESH_INTERVAL);\n\n    _this.handleMouseUpHandler_ = function (e) {\n      return _this.handleMouseUp(e);\n    };\n\n    _this.on('mousedown', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    _this.on('touchstart', function (e) {\n      return _this.handleMouseDown(e);\n    });\n\n    _this.on('mousemove', function (e) {\n      return _this.handleMouseMove(e);\n    }); // while the slider is active (the mouse has been pressed down and\n    // is dragging) or in focus we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeBar, ['focus', 'slideractive'], function () {\n      _this.volumeBar.addClass('vjs-slider-active');\n\n      _this.addClass('vjs-slider-active');\n\n      _this.trigger('slideractive');\n    });\n\n    _this.on(_this.volumeBar, ['blur', 'sliderinactive'], function () {\n      _this.volumeBar.removeClass('vjs-slider-active');\n\n      _this.removeClass('vjs-slider-active');\n\n      _this.trigger('sliderinactive');\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = VolumeControl.prototype;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-horizontal';\n\n    if (this.options_.vertical) {\n      orientationClass = 'vjs-volume-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-control vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseDown = function handleMouseDown(event) {\n    var doc = this.el_.ownerDocument;\n    this.on(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.on(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.on(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.on(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mouseup` or `touchend` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mouseup` or `touchend` event that triggered this function.\n   *\n   * @listens touchend\n   * @listens mouseup\n   */\n  ;\n\n  _proto.handleMouseUp = function handleMouseUp(event) {\n    var doc = this.el_.ownerDocument;\n    this.off(doc, 'mousemove', this.throttledHandleMouseMove);\n    this.off(doc, 'touchmove', this.throttledHandleMouseMove);\n    this.off(doc, 'mouseup', this.handleMouseUpHandler_);\n    this.off(doc, 'touchend', this.handleMouseUpHandler_);\n  }\n  /**\n   * Handle `mousedown` or `touchstart` events on the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        `mousedown` or `touchstart` event that triggered this function\n   *\n   * @listens mousedown\n   * @listens touchstart\n   */\n  ;\n\n  _proto.handleMouseMove = function handleMouseMove(event) {\n    this.volumeBar.handleMouseMove(event);\n  };\n\n  return VolumeControl;\n}(Component$1);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumeControl.prototype.options_ = {\n  children: ['volumeBar']\n};\nComponent$1.registerComponent('VolumeControl', VolumeControl);\n\n/**\n * Check if muting volume is supported and if it isn't hide the mute toggle\n * button.\n *\n * @param {Component} self\n *        A reference to the mute toggle button\n *\n * @param {Player} player\n *        A reference to the player\n *\n * @private\n */\nvar checkMuteSupport = function checkMuteSupport(self, player) {\n  // hide mute toggle button if it's not supported by the current tech\n  if (player.tech_ && !player.tech_.featuresMuteControl) {\n    self.addClass('vjs-hidden');\n  }\n\n  self.on(player, 'loadstart', function () {\n    if (!player.tech_.featuresMuteControl) {\n      self.addClass('vjs-hidden');\n    } else {\n      self.removeClass('vjs-hidden');\n    }\n  });\n};\n\n/**\n * A button component for muting the audio.\n *\n * @extends Button\n */\n\nvar MuteToggle = /*#__PURE__*/function (_Button) {\n  _inheritsLoose(MuteToggle, _Button);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function MuteToggle(player, options) {\n    var _this;\n\n    _this = _Button.call(this, player, options) || this; // hide this control if volume support is missing\n\n    checkMuteSupport(_assertThisInitialized(_this), player);\n\n    _this.on(player, ['loadstart', 'volumechange'], function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = MuteToggle.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-mute-control \" + _Button.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * This gets called when an `MuteToggle` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    var vol = this.player_.volume();\n    var lastVolume = this.player_.lastVolume_();\n\n    if (vol === 0) {\n      var volumeToSet = lastVolume < 0.1 ? 0.1 : lastVolume;\n      this.player_.volume(volumeToSet);\n      this.player_.muted(false);\n    } else {\n      this.player_.muted(this.player_.muted() ? false : true);\n    }\n  }\n  /**\n   * Update the `MuteToggle` button based on the state of `volume` and `muted`\n   * on the player.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link Player#loadstart} event if this function was called\n   *        through an event.\n   *\n   * @listens Player#loadstart\n   * @listens Player#volumechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.updateIcon_();\n    this.updateControlText_();\n  }\n  /**\n   * Update the appearance of the `MuteToggle` icon.\n   *\n   * Possible states (given `level` variable below):\n   * - 0: crossed out\n   * - 1: zero bars of volume\n   * - 2: one bar of volume\n   * - 3: two bars of volume\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateIcon_ = function updateIcon_() {\n    var vol = this.player_.volume();\n    var level = 3; // in iOS when a player is loaded with muted attribute\n    // and volume is changed with a native mute button\n    // we want to make sure muted state is updated\n\n    if (IS_IOS && this.player_.tech_ && this.player_.tech_.el_) {\n      this.player_.muted(this.player_.tech_.el_.muted);\n    }\n\n    if (vol === 0 || this.player_.muted()) {\n      level = 0;\n    } else if (vol < 0.33) {\n      level = 1;\n    } else if (vol < 0.67) {\n      level = 2;\n    } // TODO improve muted icon classes\n\n\n    for (var i = 0; i < 4; i++) {\n      removeClass(this.el_, \"vjs-vol-\" + i);\n    }\n\n    addClass(this.el_, \"vjs-vol-\" + level);\n  }\n  /**\n   * If `muted` has changed on the player, update the control text\n   * (`title` attribute on `vjs-mute-control` element and content of\n   * `vjs-control-text` element).\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateControlText_ = function updateControlText_() {\n    var soundOff = this.player_.muted() || this.player_.volume() === 0;\n    var text = soundOff ? 'Unmute' : 'Mute';\n\n    if (this.controlText() !== text) {\n      this.controlText(text);\n    }\n  };\n\n  return MuteToggle;\n}(Button);\n/**\n * The text that should display over the `MuteToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nMuteToggle.prototype.controlText_ = 'Mute';\nComponent$1.registerComponent('MuteToggle', MuteToggle);\n\n/**\n * A Component to contain the MuteToggle and VolumeControl so that\n * they can work together.\n *\n * @extends Component\n */\n\nvar VolumePanel = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VolumePanel, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function VolumePanel(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (typeof options.inline !== 'undefined') {\n      options.inline = options.inline;\n    } else {\n      options.inline = true;\n    } // pass the inline option down to the VolumeControl as vertical if\n    // the VolumeControl is on.\n\n\n    if (typeof options.volumeControl === 'undefined' || isPlain(options.volumeControl)) {\n      options.volumeControl = options.volumeControl || {};\n      options.volumeControl.vertical = !options.inline;\n    }\n\n    _this = _Component.call(this, player, options) || this; // this handler is used by mouse handler methods below\n\n    _this.handleKeyPressHandler_ = function (e) {\n      return _this.handleKeyPress(e);\n    };\n\n    _this.on(player, ['loadstart'], function (e) {\n      return _this.volumePanelState_(e);\n    });\n\n    _this.on(_this.muteToggle, 'keyup', function (e) {\n      return _this.handleKeyPress(e);\n    });\n\n    _this.on(_this.volumeControl, 'keyup', function (e) {\n      return _this.handleVolumeControlKeyUp(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyPress(e);\n    });\n\n    _this.on('mouseover', function (e) {\n      return _this.handleMouseOver(e);\n    });\n\n    _this.on('mouseout', function (e) {\n      return _this.handleMouseOut(e);\n    }); // while the slider is active (the mouse has been pressed down and\n    // is dragging) we do not want to hide the VolumeBar\n\n\n    _this.on(_this.volumeControl, ['slideractive'], _this.sliderActive_);\n\n    _this.on(_this.volumeControl, ['sliderinactive'], _this.sliderInactive_);\n\n    return _this;\n  }\n  /**\n   * Add vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#slideractive\n   * @private\n   */\n\n\n  var _proto = VolumePanel.prototype;\n\n  _proto.sliderActive_ = function sliderActive_() {\n    this.addClass('vjs-slider-active');\n  }\n  /**\n   * Removes vjs-slider-active class to the VolumePanel\n   *\n   * @listens VolumeControl#sliderinactive\n   * @private\n   */\n  ;\n\n  _proto.sliderInactive_ = function sliderInactive_() {\n    this.removeClass('vjs-slider-active');\n  }\n  /**\n   * Adds vjs-hidden or vjs-mute-toggle-only to the VolumePanel\n   * depending on MuteToggle and VolumeControl state\n   *\n   * @listens Player#loadstart\n   * @private\n   */\n  ;\n\n  _proto.volumePanelState_ = function volumePanelState_() {\n    // hide volume panel if neither volume control or mute toggle\n    // are displayed\n    if (this.volumeControl.hasClass('vjs-hidden') && this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-hidden');\n    } // if only mute toggle is visible we don't want\n    // volume panel expanding when hovered or active\n\n\n    if (this.volumeControl.hasClass('vjs-hidden') && !this.muteToggle.hasClass('vjs-hidden')) {\n      this.addClass('vjs-mute-toggle-only');\n    }\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var orientationClass = 'vjs-volume-panel-horizontal';\n\n    if (!this.options_.inline) {\n      orientationClass = 'vjs-volume-panel-vertical';\n    }\n\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: \"vjs-volume-panel vjs-control \" + orientationClass\n    });\n  }\n  /**\n   * Dispose of the `volume-panel` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseOut();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handles `keyup` events on the `VolumeControl`, looking for ESC, which closes\n   * the volume panel and sets focus on `MuteToggle`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keyup` event that caused this function to be called.\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleVolumeControlKeyUp = function handleVolumeControlKeyUp(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.muteToggle.focus();\n    }\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseover` event.\n   * Turns on listening for `mouseover` event. When they happen it\n   * calls `this.handleMouseOver`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseover` event that caused this function to be called.\n   *\n   * @listens mouseover\n   */\n  ;\n\n  _proto.handleMouseOver = function handleMouseOver(event) {\n    this.addClass('vjs-hover');\n    on(document, 'keyup', this.handleKeyPressHandler_);\n  }\n  /**\n   * This gets called when a `VolumePanel` gains hover via a `mouseout` event.\n   * Turns on listening for `mouseout` event. When they happen it\n   * calls `this.handleMouseOut`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseout` event that caused this function to be called.\n   *\n   * @listens mouseout\n   */\n  ;\n\n  _proto.handleMouseOut = function handleMouseOut(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', this.handleKeyPressHandler_);\n  }\n  /**\n   * Handles `keyup` event on the document or `keydown` event on the `VolumePanel`,\n   * looking for ESC, which hides the `VolumeControl`.\n   *\n   * @param {EventTarget~Event} event\n   *        The keypress that triggered this event.\n   *\n   * @listens keydown | keyup\n   */\n  ;\n\n  _proto.handleKeyPress = function handleKeyPress(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      this.handleMouseOut();\n    }\n  };\n\n  return VolumePanel;\n}(Component$1);\n/**\n * Default options for the `VolumeControl`\n *\n * @type {Object}\n * @private\n */\n\n\nVolumePanel.prototype.options_ = {\n  children: ['muteToggle', 'volumeControl']\n};\nComponent$1.registerComponent('VolumePanel', VolumePanel);\n\n/**\n * The Menu component is used to build popup menus, including subtitle and\n * captions selection menus.\n *\n * @extends Component\n */\n\nvar Menu = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Menu, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Player} player\n   *        the player that this component should attach to\n   *\n   * @param {Object} [options]\n   *        Object of option names and values\n   *\n   */\n  function Menu(player, options) {\n    var _this;\n\n    _this = _Component.call(this, player, options) || this;\n\n    if (options) {\n      _this.menuButton_ = options.menuButton;\n    }\n\n    _this.focusedChild_ = -1;\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyDown(e);\n    }); // All the menu item instances share the same blur handler provided by the menu container.\n\n\n    _this.boundHandleBlur_ = function (e) {\n      return _this.handleBlur(e);\n    };\n\n    _this.boundHandleTapClick_ = function (e) {\n      return _this.handleTapClick(e);\n    };\n\n    return _this;\n  }\n  /**\n   * Add event listeners to the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to add listeners to.\n   *\n   */\n\n\n  var _proto = Menu.prototype;\n\n  _proto.addEventListenerForItem = function addEventListenerForItem(component) {\n    if (!(component instanceof Component$1)) {\n      return;\n    }\n\n    this.on(component, 'blur', this.boundHandleBlur_);\n    this.on(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * Remove event listeners from the {@link MenuItem}.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem` to remove listeners.\n   *\n   */\n  ;\n\n  _proto.removeEventListenerForItem = function removeEventListenerForItem(component) {\n    if (!(component instanceof Component$1)) {\n      return;\n    }\n\n    this.off(component, 'blur', this.boundHandleBlur_);\n    this.off(component, ['tap', 'click'], this.boundHandleTapClick_);\n  }\n  /**\n   * This method will be called indirectly when the component has been added\n   * before the component adds to the new menu instance by `addItem`.\n   * In this case, the original menu instance will remove the component\n   * by calling `removeChild`.\n   *\n   * @param {Object} component\n   *        The instance of the `MenuItem`\n   */\n  ;\n\n  _proto.removeChild = function removeChild(component) {\n    if (typeof component === 'string') {\n      component = this.getChild(component);\n    }\n\n    this.removeEventListenerForItem(component);\n\n    _Component.prototype.removeChild.call(this, component);\n  }\n  /**\n   * Add a {@link MenuItem} to the menu.\n   *\n   * @param {Object|string} component\n   *        The name or instance of the `MenuItem` to add.\n   *\n   */\n  ;\n\n  _proto.addItem = function addItem(component) {\n    var childComponent = this.addChild(component);\n\n    if (childComponent) {\n      this.addEventListenerForItem(childComponent);\n    }\n  }\n  /**\n   * Create the `Menu`s DOM element.\n   *\n   * @return {Element}\n   *         the element that was created\n   */\n  ;\n\n  _proto.createEl = function createEl$1() {\n    var contentElType = this.options_.contentElType || 'ul';\n    this.contentEl_ = createEl(contentElType, {\n      className: 'vjs-menu-content'\n    });\n    this.contentEl_.setAttribute('role', 'menu');\n\n    var el = _Component.prototype.createEl.call(this, 'div', {\n      append: this.contentEl_,\n      className: 'vjs-menu'\n    });\n\n    el.appendChild(this.contentEl_); // Prevent clicks from bubbling up. Needed for Menu Buttons,\n    // where a click on the parent is significant\n\n    on(el, 'click', function (event) {\n      event.preventDefault();\n      event.stopImmediatePropagation();\n    });\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.contentEl_ = null;\n    this.boundHandleBlur_ = null;\n    this.boundHandleTapClick_ = null;\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Called when a `MenuItem` loses focus.\n   *\n   * @param {EventTarget~Event} event\n   *        The `blur` event that caused this function to be called.\n   *\n   * @listens blur\n   */\n  ;\n\n  _proto.handleBlur = function handleBlur(event) {\n    var relatedTarget = event.relatedTarget || document.activeElement; // Close menu popup when a user clicks outside the menu\n\n    if (!this.children().some(function (element) {\n      return element.el() === relatedTarget;\n    })) {\n      var btn = this.menuButton_;\n\n      if (btn && btn.buttonPressed_ && relatedTarget !== btn.el().firstChild) {\n        btn.unpressButton();\n      }\n    }\n  }\n  /**\n   * Called when a `MenuItem` gets clicked or tapped.\n   *\n   * @param {EventTarget~Event} event\n   *        The `click` or `tap` event that caused this function to be called.\n   *\n   * @listens click,tap\n   */\n  ;\n\n  _proto.handleTapClick = function handleTapClick(event) {\n    // Unpress the associated MenuButton, and move focus back to it\n    if (this.menuButton_) {\n      this.menuButton_.unpressButton();\n      var childComponents = this.children();\n\n      if (!Array.isArray(childComponents)) {\n        return;\n      }\n\n      var foundComponent = childComponents.filter(function (component) {\n        return component.el() === event.target;\n      })[0];\n\n      if (!foundComponent) {\n        return;\n      } // don't focus menu button if item is a caption settings item\n      // because focus will move elsewhere\n\n\n      if (foundComponent.name() !== 'CaptionSettingsMenuItem') {\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Handle a `keydown` event on this menu. This listener is added in the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        A `keydown` event that happened on the menu.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Left and Down Arrows\n    if (keycode.isEventKey(event, 'Left') || keycode.isEventKey(event, 'Down')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepForward(); // Up and Right Arrows\n    } else if (keycode.isEventKey(event, 'Right') || keycode.isEventKey(event, 'Up')) {\n      event.preventDefault();\n      event.stopPropagation();\n      this.stepBack();\n    }\n  }\n  /**\n   * Move to next (lower) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepForward = function stepForward() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ + 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Move to previous (higher) menu item for keyboard users.\n   */\n  ;\n\n  _proto.stepBack = function stepBack() {\n    var stepChild = 0;\n\n    if (this.focusedChild_ !== undefined) {\n      stepChild = this.focusedChild_ - 1;\n    }\n\n    this.focus(stepChild);\n  }\n  /**\n   * Set focus on a {@link MenuItem} in the `Menu`.\n   *\n   * @param {Object|string} [item=0]\n   *        Index of child item set focus on.\n   */\n  ;\n\n  _proto.focus = function focus(item) {\n    if (item === void 0) {\n      item = 0;\n    }\n\n    var children = this.children().slice();\n    var haveTitle = children.length && children[0].hasClass('vjs-menu-title');\n\n    if (haveTitle) {\n      children.shift();\n    }\n\n    if (children.length > 0) {\n      if (item < 0) {\n        item = 0;\n      } else if (item >= children.length) {\n        item = children.length - 1;\n      }\n\n      this.focusedChild_ = item;\n      children[item].el_.focus();\n    }\n  };\n\n  return Menu;\n}(Component$1);\n\nComponent$1.registerComponent('Menu', Menu);\n\n/**\n * A `MenuButton` class for any popup {@link Menu}.\n *\n * @extends Component\n */\n\nvar MenuButton = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(MenuButton, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function MenuButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _Component.call(this, player, options) || this;\n    _this.menuButton_ = new Button(player, options);\n\n    _this.menuButton_.controlText(_this.controlText_);\n\n    _this.menuButton_.el_.setAttribute('aria-haspopup', 'true'); // Add buildCSSClass values to the button, not the wrapper\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    _this.menuButton_.el_.className = _this.buildCSSClass() + ' ' + buttonClass;\n\n    _this.menuButton_.removeClass('vjs-control');\n\n    _this.addChild(_this.menuButton_);\n\n    _this.update();\n\n    _this.enabled_ = true;\n\n    var handleClick = function handleClick(e) {\n      return _this.handleClick(e);\n    };\n\n    _this.handleMenuKeyUp_ = function (e) {\n      return _this.handleMenuKeyUp(e);\n    };\n\n    _this.on(_this.menuButton_, 'tap', handleClick);\n\n    _this.on(_this.menuButton_, 'click', handleClick);\n\n    _this.on(_this.menuButton_, 'keydown', function (e) {\n      return _this.handleKeyDown(e);\n    });\n\n    _this.on(_this.menuButton_, 'mouseenter', function () {\n      _this.addClass('vjs-hover');\n\n      _this.menu.show();\n\n      on(document, 'keyup', _this.handleMenuKeyUp_);\n    });\n\n    _this.on('mouseleave', function (e) {\n      return _this.handleMouseLeave(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleSubmenuKeyDown(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   */\n\n\n  var _proto = MenuButton.prototype;\n\n  _proto.update = function update() {\n    var menu = this.createMenu();\n\n    if (this.menu) {\n      this.menu.dispose();\n      this.removeChild(this.menu);\n    }\n\n    this.menu = menu;\n    this.addChild(menu);\n    /**\n     * Track the state of the menu button\n     *\n     * @type {Boolean}\n     * @private\n     */\n\n    this.buttonPressed_ = false;\n    this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n\n    if (this.items && this.items.length <= this.hideThreshold_) {\n      this.hide();\n      this.menu.contentEl_.removeAttribute('role');\n    } else {\n      this.show();\n      this.menu.contentEl_.setAttribute('role', 'menu');\n    }\n  }\n  /**\n   * Create the menu and add all items to it.\n   *\n   * @return {Menu}\n   *         The constructed menu\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    var menu = new Menu(this.player_, {\n      menuButton: this\n    });\n    /**\n     * Hide the menu if the number of items is less than or equal to this threshold. This defaults\n     * to 0 and whenever we add items which can be hidden to the menu we'll increment it. We list\n     * it here because every time we run `createMenu` we need to reset the value.\n     *\n     * @protected\n     * @type {Number}\n     */\n\n    this.hideThreshold_ = 0; // Add a title list item to the top\n\n    if (this.options_.title) {\n      var titleEl = createEl('li', {\n        className: 'vjs-menu-title',\n        textContent: toTitleCase$1(this.options_.title),\n        tabIndex: -1\n      });\n      var titleComponent = new Component$1(this.player_, {\n        el: titleEl\n      });\n      menu.addItem(titleComponent);\n    }\n\n    this.items = this.createItems();\n\n    if (this.items) {\n      // Add menu items to the menu\n      for (var i = 0; i < this.items.length; i++) {\n        menu.addItem(this.items[i]);\n      }\n    }\n\n    return menu;\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   * @abstract\n   */\n  ;\n\n  _proto.createItems = function createItems() {}\n  /**\n   * Create the `MenuButtons`s DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: this.buildWrapperCSSClass()\n    }, {});\n  }\n  /**\n   * Allow sub components to stack CSS class names for the wrapper element\n   *\n   * @return {string}\n   *         The constructed wrapper DOM `className`\n   */\n  ;\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    } // TODO: Fix the CSS so that this isn't necessary\n\n\n    var buttonClass = Button.prototype.buildCSSClass();\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + buttonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    var menuButtonClass = 'vjs-menu-button'; // If the inline option is passed, we want to use different styles altogether.\n\n    if (this.options_.inline === true) {\n      menuButtonClass += '-inline';\n    } else {\n      menuButtonClass += '-popup';\n    }\n\n    return \"vjs-menu-button \" + menuButtonClass + \" \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Get or set the localized control text that will be used for accessibility.\n   *\n   * > NOTE: This will come from the internal `menuButton_` element.\n   *\n   * @param {string} [text]\n   *        Control text for element.\n   *\n   * @param {Element} [el=this.menuButton_.el()]\n   *        Element to set the title on.\n   *\n   * @return {string}\n   *         - The control text when getting\n   */\n  ;\n\n  _proto.controlText = function controlText(text, el) {\n    if (el === void 0) {\n      el = this.menuButton_.el();\n    }\n\n    return this.menuButton_.controlText(text, el);\n  }\n  /**\n   * Dispose of the `menu-button` and all child components.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.handleMouseLeave();\n\n    _Component.prototype.dispose.call(this);\n  }\n  /**\n   * Handle a click on a `MenuButton`.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    if (this.buttonPressed_) {\n      this.unpressButton();\n    } else {\n      this.pressButton();\n    }\n  }\n  /**\n   * Handle `mouseleave` for `MenuButton`.\n   *\n   * @param {EventTarget~Event} event\n   *        The `mouseleave` event that caused this function to be called.\n   *\n   * @listens mouseleave\n   */\n  ;\n\n  _proto.handleMouseLeave = function handleMouseLeave(event) {\n    this.removeClass('vjs-hover');\n    off(document, 'keyup', this.handleMenuKeyUp_);\n  }\n  /**\n   * Set the focus to the actual button, not to this element\n   */\n  ;\n\n  _proto.focus = function focus() {\n    this.menuButton_.focus();\n  }\n  /**\n   * Remove the focus from the actual button, not this element\n   */\n  ;\n\n  _proto.blur = function blur() {\n    this.menuButton_.blur();\n  }\n  /**\n   * Handle tab, escape, down arrow, and up arrow keys for `MenuButton`. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      } // Up Arrow or Down Arrow also 'press' the button to open the menu\n\n    } else if (keycode.isEventKey(event, 'Up') || keycode.isEventKey(event, 'Down')) {\n      if (!this.buttonPressed_) {\n        event.preventDefault();\n        this.pressButton();\n      }\n    }\n  }\n  /**\n   * Handle a `keyup` event on a `MenuButton`. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keyup\n   */\n  ;\n\n  _proto.handleMenuKeyUp = function handleMenuKeyUp(event) {\n    // Escape hides popup menu\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      this.removeClass('vjs-hover');\n    }\n  }\n  /**\n   * This method name now delegates to `handleSubmenuKeyDown`. This means\n   * anyone calling `handleSubmenuKeyPress` will not see their method calls\n   * stop working.\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleSubmenuKeyPress = function handleSubmenuKeyPress(event) {\n    this.handleSubmenuKeyDown(event);\n  }\n  /**\n   * Handle a `keydown` event on a sub-menu. The listener for this is added in\n   * the constructor.\n   *\n   * @param {EventTarget~Event} event\n   *        Key press event\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleSubmenuKeyDown = function handleSubmenuKeyDown(event) {\n    // Escape or Tab unpress the 'button'\n    if (keycode.isEventKey(event, 'Esc') || keycode.isEventKey(event, 'Tab')) {\n      if (this.buttonPressed_) {\n        this.unpressButton();\n      } // Don't preventDefault for Tab key - we still want to lose focus\n\n\n      if (!keycode.isEventKey(event, 'Tab')) {\n        event.preventDefault(); // Set focus back to the menu button's button\n\n        this.menuButton_.focus();\n      }\n    }\n  }\n  /**\n   * Put the current `MenuButton` into a pressed state.\n   */\n  ;\n\n  _proto.pressButton = function pressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = true;\n      this.menu.show();\n      this.menu.lockShowing();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'true'); // set the focus into the submenu, except on iOS where it is resulting in\n      // undesired scrolling behavior when the player is in an iframe\n\n      if (IS_IOS && isInFrame()) {\n        // Return early so that the menu isn't focused\n        return;\n      }\n\n      this.menu.focus();\n    }\n  }\n  /**\n   * Take the current `MenuButton` out of a pressed state.\n   */\n  ;\n\n  _proto.unpressButton = function unpressButton() {\n    if (this.enabled_) {\n      this.buttonPressed_ = false;\n      this.menu.unlockShowing();\n      this.menu.hide();\n      this.menuButton_.el_.setAttribute('aria-expanded', 'false');\n    }\n  }\n  /**\n   * Disable the `MenuButton`. Don't allow it to be clicked.\n   */\n  ;\n\n  _proto.disable = function disable() {\n    this.unpressButton();\n    this.enabled_ = false;\n    this.addClass('vjs-disabled');\n    this.menuButton_.disable();\n  }\n  /**\n   * Enable the `MenuButton`. Allow it to be clicked.\n   */\n  ;\n\n  _proto.enable = function enable() {\n    this.enabled_ = true;\n    this.removeClass('vjs-disabled');\n    this.menuButton_.enable();\n  };\n\n  return MenuButton;\n}(Component$1);\n\nComponent$1.registerComponent('MenuButton', MenuButton);\n\n/**\n * The base class for buttons that toggle specific  track types (e.g. subtitles).\n *\n * @extends MenuButton\n */\n\nvar TrackButton = /*#__PURE__*/function (_MenuButton) {\n  _inheritsLoose(TrackButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TrackButton(player, options) {\n    var _this;\n\n    var tracks = options.tracks;\n    _this = _MenuButton.call(this, player, options) || this;\n\n    if (_this.items.length <= 1) {\n      _this.hide();\n    }\n\n    if (!tracks) {\n      return _assertThisInitialized(_this);\n    }\n\n    var updateHandler = bind(_assertThisInitialized(_this), _this.update);\n    tracks.addEventListener('removetrack', updateHandler);\n    tracks.addEventListener('addtrack', updateHandler);\n    tracks.addEventListener('labelchange', updateHandler);\n\n    _this.player_.on('ready', updateHandler);\n\n    _this.player_.on('dispose', function () {\n      tracks.removeEventListener('removetrack', updateHandler);\n      tracks.removeEventListener('addtrack', updateHandler);\n      tracks.removeEventListener('labelchange', updateHandler);\n    });\n\n    return _this;\n  }\n\n  return TrackButton;\n}(MenuButton);\n\nComponent$1.registerComponent('TrackButton', TrackButton);\n\n/**\n * @file menu-keys.js\n */\n\n/**\n  * All keys used for operation of a menu (`MenuButton`, `Menu`, and `MenuItem`)\n  * Note that 'Enter' and 'Space' are not included here (otherwise they would\n  * prevent the `MenuButton` and `MenuItem` from being keyboard-clickable)\n  * @typedef MenuKeys\n  * @array\n  */\nvar MenuKeys = ['Tab', 'Esc', 'Up', 'Down', 'Right', 'Left'];\n\n/**\n * The component for a menu item. `<li>`\n *\n * @extends ClickableComponent\n */\n\nvar MenuItem = /*#__PURE__*/function (_ClickableComponent) {\n  _inheritsLoose(MenuItem, _ClickableComponent);\n\n  /**\n   * Creates an instance of the this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   *\n   */\n  function MenuItem(player, options) {\n    var _this;\n\n    _this = _ClickableComponent.call(this, player, options) || this;\n    _this.selectable = options.selectable;\n    _this.isSelected_ = options.selected || false;\n    _this.multiSelectable = options.multiSelectable;\n\n    _this.selected(_this.isSelected_);\n\n    if (_this.selectable) {\n      if (_this.multiSelectable) {\n        _this.el_.setAttribute('role', 'menuitemcheckbox');\n      } else {\n        _this.el_.setAttribute('role', 'menuitemradio');\n      }\n    } else {\n      _this.el_.setAttribute('role', 'menuitem');\n    }\n\n    return _this;\n  }\n  /**\n   * Create the `MenuItem's DOM element\n   *\n   * @param {string} [type=li]\n   *        Element's node type, not actually used, always set to `li`.\n   *\n   * @param {Object} [props={}]\n   *        An object of properties that should be set on the element\n   *\n   * @param {Object} [attrs={}]\n   *        An object of attributes that should be set on the element\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n\n\n  var _proto = MenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    // The control is textual, not just an icon\n    this.nonIconControl = true;\n\n    var el = _ClickableComponent.prototype.createEl.call(this, 'li', assign({\n      className: 'vjs-menu-item',\n      tabIndex: -1\n    }, props), attrs); // swap icon with menu item text.\n\n\n    el.replaceChild(createEl('span', {\n      className: 'vjs-menu-item-text',\n      textContent: this.localize(this.options_.label)\n    }), el.querySelector('.vjs-icon-placeholder'));\n    return el;\n  }\n  /**\n   * Ignore keys which are used by the menu, but pass any other ones up. See\n   * {@link ClickableComponent#handleKeyDown} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    if (!MenuKeys.some(function (key) {\n      return keycode.isEventKey(event, key);\n    })) {\n      // Pass keydown handling up for unused keys\n      _ClickableComponent.prototype.handleKeyDown.call(this, event);\n    }\n  }\n  /**\n   * Any click on a `MenuItem` puts it into the selected state.\n   * See {@link ClickableComponent#handleClick} for instances where this is called.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    this.selected(true);\n  }\n  /**\n   * Set the state for this menu item as selected or not.\n   *\n   * @param {boolean} selected\n   *        if the menu item is selected or not\n   */\n  ;\n\n  _proto.selected = function selected(_selected) {\n    if (this.selectable) {\n      if (_selected) {\n        this.addClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'true'); // aria-checked isn't fully supported by browsers/screen readers,\n        // so indicate selected state to screen reader in the control text.\n\n        this.controlText(', selected');\n        this.isSelected_ = true;\n      } else {\n        this.removeClass('vjs-selected');\n        this.el_.setAttribute('aria-checked', 'false'); // Indicate un-selected state to screen reader\n\n        this.controlText('');\n        this.isSelected_ = false;\n      }\n    }\n  };\n\n  return MenuItem;\n}(ClickableComponent);\n\nComponent$1.registerComponent('MenuItem', MenuItem);\n\n/**\n * The specific menu item type for selecting a language within a text track kind\n *\n * @extends MenuItem\n */\n\nvar TextTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(TextTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function TextTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.textTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.mode === 'showing';\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track; // Determine the relevant kind(s) of tracks for this component and filter\n    // out empty kinds.\n\n    _this.kinds = (options.kinds || [options.kind || _this.track.kind]).filter(Boolean);\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    var selectedLanguageChangeHandler = function selectedLanguageChangeHandler() {\n      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {\n        args[_key2] = arguments[_key2];\n      }\n\n      _this.handleSelectedLanguageChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    player.on(['loadstart', 'texttrackchange'], changeHandler);\n    tracks.addEventListener('change', changeHandler);\n    tracks.addEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n\n    _this.on('dispose', function () {\n      player.off(['loadstart', 'texttrackchange'], changeHandler);\n      tracks.removeEventListener('change', changeHandler);\n      tracks.removeEventListener('selectedlanguagechange', selectedLanguageChangeHandler);\n    }); // iOS7 doesn't dispatch change events to TextTrackLists when an\n    // associated track's mode changes. Without something like\n    // Object.observe() (also not present on iOS7), it's not\n    // possible to detect changes to the mode attribute and polyfill\n    // the change event. As a poor substitute, we manually dispatch\n    // change events whenever the controls modify the mode.\n\n\n    if (tracks.onchange === undefined) {\n      var event;\n\n      _this.on(['tap', 'click'], function () {\n        if (typeof window$1.Event !== 'object') {\n          // Android 2.3 throws an Illegal Constructor error for window.Event\n          try {\n            event = new window$1.Event('change');\n          } catch (err) {// continue regardless of error\n          }\n        }\n\n        if (!event) {\n          event = document.createEvent('Event');\n          event.initEvent('change', true, true);\n        }\n\n        tracks.dispatchEvent(event);\n      });\n    } // set the default state based on current tracks\n\n\n    _this.handleTracksChange();\n\n    return _this;\n  }\n  /**\n   * This gets called when an `TextTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = TextTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    var referenceTrack = this.track;\n    var tracks = this.player_.textTracks();\n\n    _MenuItem.prototype.handleClick.call(this, event);\n\n    if (!tracks) {\n      return;\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // If the track from the text tracks list is not of the right kind,\n      // skip it. We do not want to affect tracks of incompatible kind(s).\n\n      if (this.kinds.indexOf(track.kind) === -1) {\n        continue;\n      } // If this text track is the component's track and it is not showing,\n      // set it to showing.\n\n\n      if (track === referenceTrack) {\n        if (track.mode !== 'showing') {\n          track.mode = 'showing';\n        } // If this text track is not the component's track and it is not\n        // disabled, set it to disabled.\n\n      } else if (track.mode !== 'disabled') {\n        track.mode = 'disabled';\n      }\n    }\n  }\n  /**\n   * Handle text track list change\n   *\n   * @param {EventTarget~Event} event\n   *        The `change` event that caused this function to be called.\n   *\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var shouldBeSelected = this.track.mode === 'showing'; // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    if (this.track.mode === 'showing') {\n      var selectedLanguage = this.player_.cache_.selectedLanguage; // Don't replace the kind of track across the same language\n\n      if (selectedLanguage && selectedLanguage.enabled && selectedLanguage.language === this.track.language && selectedLanguage.kind !== this.track.kind) {\n        return;\n      }\n\n      this.player_.cache_.selectedLanguage = {\n        enabled: true,\n        language: this.track.language,\n        kind: this.track.kind\n      };\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    // remove reference to track object on dispose\n    this.track = null;\n\n    _MenuItem.prototype.dispose.call(this);\n  };\n\n  return TextTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('TextTrackMenuItem', TextTrackMenuItem);\n\n/**\n * A special menu item for turning of a specific type of text track\n *\n * @extends TextTrackMenuItem\n */\n\nvar OffTextTrackMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(OffTextTrackMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function OffTextTrackMenuItem(player, options) {\n    // Create pseudo track info\n    // Requires options['kind']\n    options.track = {\n      player: player,\n      // it is no longer necessary to store `kind` or `kinds` on the track itself\n      // since they are now stored in the `kinds` property of all instances of\n      // TextTrackMenuItem, but this will remain for backwards compatibility\n      kind: options.kind,\n      kinds: options.kinds,\n      \"default\": false,\n      mode: 'disabled'\n    };\n\n    if (!options.kinds) {\n      options.kinds = [options.kind];\n    }\n\n    if (options.label) {\n      options.track.label = options.label;\n    } else {\n      options.track.label = options.kinds.join(' and ') + ' off';\n    } // MenuItem is selectable\n\n\n    options.selectable = true; // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n\n    options.multiSelectable = false;\n    return _TextTrackMenuItem.call(this, player, options) || this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   */\n\n\n  var _proto = OffTextTrackMenuItem.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var shouldBeSelected = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (this.options_.kinds.indexOf(track.kind) > -1 && track.mode === 'showing') {\n        shouldBeSelected = false;\n        break;\n      }\n    } // Prevent redundant selected() calls because they may cause\n    // screen readers to read the appended control text unnecessarily\n\n\n    if (shouldBeSelected !== this.isSelected_) {\n      this.selected(shouldBeSelected);\n    }\n  };\n\n  _proto.handleSelectedLanguageChange = function handleSelectedLanguageChange(event) {\n    var tracks = this.player().textTracks();\n    var allHidden = true;\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (['captions', 'descriptions', 'subtitles'].indexOf(track.kind) > -1 && track.mode === 'showing') {\n        allHidden = false;\n        break;\n      }\n    }\n\n    if (allHidden) {\n      this.player_.cache_.selectedLanguage = {\n        enabled: false\n      };\n    }\n  };\n\n  return OffTextTrackMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('OffTextTrackMenuItem', OffTextTrackMenuItem);\n\n/**\n * The base class for buttons that toggle specific text track types (e.g. subtitles)\n *\n * @extends MenuButton\n */\n\nvar TextTrackButton = /*#__PURE__*/function (_TrackButton) {\n  _inheritsLoose(TextTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function TextTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.textTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @param {TextTrackMenuItem[]} [items=[]]\n   *        Existing array of items to use during creation\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items that were created\n   */\n\n\n  var _proto = TextTrackButton.prototype;\n\n  _proto.createItems = function createItems(items, TrackMenuItem) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    if (TrackMenuItem === void 0) {\n      TrackMenuItem = TextTrackMenuItem;\n    }\n\n    // Label is an override for the [track] off label\n    // USed to localise captions/subtitles\n    var label;\n\n    if (this.label_) {\n      label = this.label_ + \" off\";\n    } // Add an OFF menu item to turn all tracks off\n\n\n    items.push(new OffTextTrackMenuItem(this.player_, {\n      kinds: this.kinds_,\n      kind: this.kind_,\n      label: label\n    }));\n    this.hideThreshold_ += 1;\n    var tracks = this.player_.textTracks();\n\n    if (!Array.isArray(this.kinds_)) {\n      this.kinds_ = [this.kind_];\n    }\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // only add tracks that are of an appropriate kind and have a label\n\n      if (this.kinds_.indexOf(track.kind) > -1) {\n        var item = new TrackMenuItem(this.player_, {\n          track: track,\n          kinds: this.kinds_,\n          kind: this.kind_,\n          // MenuItem is selectable\n          selectable: true,\n          // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n          multiSelectable: false\n        });\n        item.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n        items.push(item);\n      }\n    }\n\n    return items;\n  };\n\n  return TextTrackButton;\n}(TrackButton);\n\nComponent$1.registerComponent('TextTrackButton', TextTrackButton);\n\n/**\n * The chapter track menu item\n *\n * @extends MenuItem\n */\n\nvar ChaptersTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(ChaptersTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function ChaptersTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var cue = options.cue;\n    var currentTime = player.currentTime(); // Modify options for parent MenuItem class's init.\n\n    options.selectable = true;\n    options.multiSelectable = false;\n    options.label = cue.text;\n    options.selected = cue.startTime <= currentTime && currentTime < cue.endTime;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n    _this.cue = cue;\n    return _this;\n  }\n  /**\n   * This gets called when an `ChaptersTrackMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = ChaptersTrackMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player_.currentTime(this.cue.startTime);\n  };\n\n  return ChaptersTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('ChaptersTrackMenuItem', ChaptersTrackMenuItem);\n\n/**\n * The button component for toggling and selecting chapters\n * Chapters act much differently than other text tracks\n * Cues are navigation vs. other tracks of alternative languages\n *\n * @extends TextTrackButton\n */\n\nvar ChaptersButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(ChaptersButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this function is ready.\n   */\n  function ChaptersButton(player, options, ready) {\n    var _this;\n\n    _this = _TextTrackButton.call(this, player, options, ready) || this;\n\n    _this.selectCurrentItem_ = function () {\n      _this.items.forEach(function (item) {\n        item.selected(_this.track_.activeCues[0] === item.cue);\n      });\n    };\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = ChaptersButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-chapters-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Update the menu based on the current state of its items.\n   *\n   * @param {EventTarget~Event} [event]\n   *        An event that triggered this function to run.\n   *\n   * @listens TextTrackList#addtrack\n   * @listens TextTrackList#removetrack\n   * @listens TextTrackList#change\n   */\n  ;\n\n  _proto.update = function update(event) {\n    if (event && event.track && event.track.kind !== 'chapters') {\n      return;\n    }\n\n    var track = this.findChaptersTrack();\n\n    if (track !== this.track_) {\n      this.setTrack(track);\n\n      _TextTrackButton.prototype.update.call(this);\n    } else if (!this.items || track && track.cues && track.cues.length !== this.items.length) {\n      // Update the menu initially or if the number of cues has changed since set\n      _TextTrackButton.prototype.update.call(this);\n    }\n  }\n  /**\n   * Set the currently selected track for the chapters button.\n   *\n   * @param {TextTrack} track\n   *        The new track to select. Nothing will change if this is the currently selected\n   *        track.\n   */\n  ;\n\n  _proto.setTrack = function setTrack(track) {\n    if (this.track_ === track) {\n      return;\n    }\n\n    if (!this.updateHandler_) {\n      this.updateHandler_ = this.update.bind(this);\n    } // here this.track_ refers to the old track instance\n\n\n    if (this.track_) {\n      var remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (remoteTextTrackEl) {\n        remoteTextTrackEl.removeEventListener('load', this.updateHandler_);\n      }\n\n      this.track_.removeEventListener('cuechange', this.selectCurrentItem_);\n      this.track_ = null;\n    }\n\n    this.track_ = track; // here this.track_ refers to the new track instance\n\n    if (this.track_) {\n      this.track_.mode = 'hidden';\n\n      var _remoteTextTrackEl = this.player_.remoteTextTrackEls().getTrackElementByTrack_(this.track_);\n\n      if (_remoteTextTrackEl) {\n        _remoteTextTrackEl.addEventListener('load', this.updateHandler_);\n      }\n\n      this.track_.addEventListener('cuechange', this.selectCurrentItem_);\n    }\n  }\n  /**\n   * Find the track object that is currently in use by this ChaptersButton\n   *\n   * @return {TextTrack|undefined}\n   *         The current track or undefined if none was found.\n   */\n  ;\n\n  _proto.findChaptersTrack = function findChaptersTrack() {\n    var tracks = this.player_.textTracks() || [];\n\n    for (var i = tracks.length - 1; i >= 0; i--) {\n      // We will always choose the last track as our chaptersTrack\n      var track = tracks[i];\n\n      if (track.kind === this.kind_) {\n        return track;\n      }\n    }\n  }\n  /**\n   * Get the caption for the ChaptersButton based on the track label. This will also\n   * use the current tracks localized kind as a fallback if a label does not exist.\n   *\n   * @return {string}\n   *         The tracks current label or the localized track kind.\n   */\n  ;\n\n  _proto.getMenuCaption = function getMenuCaption() {\n    if (this.track_ && this.track_.label) {\n      return this.track_.label;\n    }\n\n    return this.localize(toTitleCase$1(this.kind_));\n  }\n  /**\n   * Create menu from chapter track\n   *\n   * @return {Menu}\n   *         New menu for the chapter buttons\n   */\n  ;\n\n  _proto.createMenu = function createMenu() {\n    this.options_.title = this.getMenuCaption();\n    return _TextTrackButton.prototype.createMenu.call(this);\n  }\n  /**\n   * Create a menu item for each text track\n   *\n   * @return {TextTrackMenuItem[]}\n   *         Array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!this.track_) {\n      return items;\n    }\n\n    var cues = this.track_.cues;\n\n    if (!cues) {\n      return items;\n    }\n\n    for (var i = 0, l = cues.length; i < l; i++) {\n      var cue = cues[i];\n      var mi = new ChaptersTrackMenuItem(this.player_, {\n        track: this.track_,\n        cue: cue\n      });\n      items.push(mi);\n    }\n\n    return items;\n  };\n\n  return ChaptersButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nChaptersButton.prototype.kind_ = 'chapters';\n/**\n * The text that should display over the `ChaptersButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nChaptersButton.prototype.controlText_ = 'Chapters';\nComponent$1.registerComponent('ChaptersButton', ChaptersButton);\n\n/**\n * The button component for toggling and selecting descriptions\n *\n * @extends TextTrackButton\n */\n\nvar DescriptionsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(DescriptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function DescriptionsButton(player, options, ready) {\n    var _this;\n\n    _this = _TextTrackButton.call(this, player, options, ready) || this;\n    var tracks = player.textTracks();\n    var changeHandler = bind(_assertThisInitialized(_this), _this.handleTracksChange);\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n  /**\n   * Handle text track change\n   *\n   * @param {EventTarget~Event} event\n   *        The event that caused this function to run\n   *\n   * @listens TextTrackList#change\n   */\n\n\n  var _proto = DescriptionsButton.prototype;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    var tracks = this.player().textTracks();\n    var disabled = false; // Check whether a track of a different kind is showing\n\n    for (var i = 0, l = tracks.length; i < l; i++) {\n      var track = tracks[i];\n\n      if (track.kind !== this.kind_ && track.mode === 'showing') {\n        disabled = true;\n        break;\n      }\n    } // If another track is showing, disable this menu button\n\n\n    if (disabled) {\n      this.disable();\n    } else {\n      this.enable();\n    }\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-descriptions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return DescriptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nDescriptionsButton.prototype.kind_ = 'descriptions';\n/**\n * The text that should display over the `DescriptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nDescriptionsButton.prototype.controlText_ = 'Descriptions';\nComponent$1.registerComponent('DescriptionsButton', DescriptionsButton);\n\n/**\n * The button component for toggling and selecting subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubtitlesButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(SubtitlesButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function SubtitlesButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubtitlesButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subtitles-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  };\n\n  return SubtitlesButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nSubtitlesButton.prototype.kind_ = 'subtitles';\n/**\n * The text that should display over the `SubtitlesButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nSubtitlesButton.prototype.controlText_ = 'Subtitles';\nComponent$1.registerComponent('SubtitlesButton', SubtitlesButton);\n\n/**\n * The menu item for caption track settings menu\n *\n * @extends TextTrackMenuItem\n */\n\nvar CaptionSettingsMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(CaptionSettingsMenuItem, _TextTrackMenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function CaptionSettingsMenuItem(player, options) {\n    var _this;\n\n    options.track = {\n      player: player,\n      kind: options.kind,\n      label: options.kind + ' settings',\n      selectable: false,\n      \"default\": false,\n      mode: 'disabled'\n    }; // CaptionSettingsMenuItem has no concept of 'selected'\n\n    options.selectable = false;\n    options.name = 'CaptionSettingsMenuItem';\n    _this = _TextTrackMenuItem.call(this, player, options) || this;\n\n    _this.addClass('vjs-texttrack-settings');\n\n    _this.controlText(', opens ' + options.kind + ' settings dialog');\n\n    return _this;\n  }\n  /**\n   * This gets called when an `CaptionSettingsMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = CaptionSettingsMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    this.player().getChild('textTrackSettings').open();\n  };\n\n  return CaptionSettingsMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('CaptionSettingsMenuItem', CaptionSettingsMenuItem);\n\n/**\n * The button component for toggling and selecting captions\n *\n * @extends TextTrackButton\n */\n\nvar CaptionsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(CaptionsButton, _TextTrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        The function to call when this component is ready.\n   */\n  function CaptionsButton(player, options, ready) {\n    return _TextTrackButton.call(this, player, options, ready) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = CaptionsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-captions-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.kind_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    return _TextTrackButton.prototype.createItems.call(this, items);\n  };\n\n  return CaptionsButton;\n}(TextTrackButton);\n/**\n * `kind` of TextTrack to look for to associate it with this menu.\n *\n * @type {string}\n * @private\n */\n\n\nCaptionsButton.prototype.kind_ = 'captions';\n/**\n * The text that should display over the `CaptionsButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\nCaptionsButton.prototype.controlText_ = 'Captions';\nComponent$1.registerComponent('CaptionsButton', CaptionsButton);\n\n/**\n * SubsCapsMenuItem has an [cc] icon to distinguish captions from subtitles\n * in the SubsCapsMenu.\n *\n * @extends TextTrackMenuItem\n */\n\nvar SubsCapsMenuItem = /*#__PURE__*/function (_TextTrackMenuItem) {\n  _inheritsLoose(SubsCapsMenuItem, _TextTrackMenuItem);\n\n  function SubsCapsMenuItem() {\n    return _TextTrackMenuItem.apply(this, arguments) || this;\n  }\n\n  var _proto = SubsCapsMenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    var el = _TextTrackMenuItem.prototype.createEl.call(this, type, props, attrs);\n\n    var parentSpan = el.querySelector('.vjs-menu-item-text');\n\n    if (this.options_.track.kind === 'captions') {\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-icon-placeholder'\n      }, {\n        'aria-hidden': true\n      }));\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-control-text',\n        // space added as the text will visually flow with the\n        // label\n        textContent: \" \" + this.localize('Captions')\n      }));\n    }\n\n    return el;\n  };\n\n  return SubsCapsMenuItem;\n}(TextTrackMenuItem);\n\nComponent$1.registerComponent('SubsCapsMenuItem', SubsCapsMenuItem);\n\n/**\n * The button component for toggling and selecting captions and/or subtitles\n *\n * @extends TextTrackButton\n */\n\nvar SubsCapsButton = /*#__PURE__*/function (_TextTrackButton) {\n  _inheritsLoose(SubsCapsButton, _TextTrackButton);\n\n  function SubsCapsButton(player, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _TextTrackButton.call(this, player, options) || this; // Although North America uses \"captions\" in most cases for\n    // \"captions and subtitles\" other locales use \"subtitles\"\n\n    _this.label_ = 'subtitles';\n\n    if (['en', 'en-us', 'en-ca', 'fr-ca'].indexOf(_this.player_.language_) > -1) {\n      _this.label_ = 'captions';\n    }\n\n    _this.menuButton_.controlText(toTitleCase$1(_this.label_));\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = SubsCapsButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-subs-caps-button \" + _TextTrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create caption/subtitles menu items\n   *\n   * @return {CaptionSettingsMenuItem[]}\n   *         The array of current menu items.\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var items = [];\n\n    if (!(this.player().tech_ && this.player().tech_.featuresNativeTextTracks) && this.player().getChild('textTrackSettings')) {\n      items.push(new CaptionSettingsMenuItem(this.player_, {\n        kind: this.label_\n      }));\n      this.hideThreshold_ += 1;\n    }\n\n    items = _TextTrackButton.prototype.createItems.call(this, items, SubsCapsMenuItem);\n    return items;\n  };\n\n  return SubsCapsButton;\n}(TextTrackButton);\n/**\n * `kind`s of TextTrack to look for to associate it with this menu.\n *\n * @type {array}\n * @private\n */\n\n\nSubsCapsButton.prototype.kinds_ = ['captions', 'subtitles'];\n/**\n * The text that should display over the `SubsCapsButton`s controls.\n *\n *\n * @type {string}\n * @private\n */\n\nSubsCapsButton.prototype.controlText_ = 'Subtitles';\nComponent$1.registerComponent('SubsCapsButton', SubsCapsButton);\n\n/**\n * An {@link AudioTrack} {@link MenuItem}\n *\n * @extends MenuItem\n */\n\nvar AudioTrackMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(AudioTrackMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function AudioTrackMenuItem(player, options) {\n    var _this;\n\n    var track = options.track;\n    var tracks = player.audioTracks(); // Modify options for parent MenuItem class's init.\n\n    options.label = track.label || track.language || 'Unknown';\n    options.selected = track.enabled;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.track = track;\n\n    _this.addClass(\"vjs-\" + track.kind + \"-menu-item\");\n\n    var changeHandler = function changeHandler() {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      _this.handleTracksChange.apply(_assertThisInitialized(_this), args);\n    };\n\n    tracks.addEventListener('change', changeHandler);\n\n    _this.on('dispose', function () {\n      tracks.removeEventListener('change', changeHandler);\n    });\n\n    return _this;\n  }\n\n  var _proto = AudioTrackMenuItem.prototype;\n\n  _proto.createEl = function createEl$1(type, props, attrs) {\n    var el = _MenuItem.prototype.createEl.call(this, type, props, attrs);\n\n    var parentSpan = el.querySelector('.vjs-menu-item-text');\n\n    if (this.options_.track.kind === 'main-desc') {\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-icon-placeholder'\n      }, {\n        'aria-hidden': true\n      }));\n      parentSpan.appendChild(createEl('span', {\n        className: 'vjs-control-text',\n        textContent: ' ' + this.localize('Descriptions')\n      }));\n    }\n\n    return el;\n  }\n  /**\n   * This gets called when an `AudioTrackMenuItem is \"clicked\". See {@link ClickableComponent}\n   * for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this, event); // the audio track list will automatically toggle other tracks\n    // off for us.\n\n\n    this.track.enabled = true; // when native audio tracks are used, we want to make sure that other tracks are turned off\n\n    if (this.player_.tech_.featuresNativeAudioTracks) {\n      var tracks = this.player_.audioTracks();\n\n      for (var i = 0; i < tracks.length; i++) {\n        var track = tracks[i]; // skip the current track since we enabled it above\n\n        if (track === this.track) {\n          continue;\n        }\n\n        track.enabled = track === this.track;\n      }\n    }\n  }\n  /**\n   * Handle any {@link AudioTrack} change.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The {@link AudioTrackList#change} event that caused this to run.\n   *\n   * @listens AudioTrackList#change\n   */\n  ;\n\n  _proto.handleTracksChange = function handleTracksChange(event) {\n    this.selected(this.track.enabled);\n  };\n\n  return AudioTrackMenuItem;\n}(MenuItem);\n\nComponent$1.registerComponent('AudioTrackMenuItem', AudioTrackMenuItem);\n\n/**\n * The base class for buttons that toggle specific {@link AudioTrack} types.\n *\n * @extends TrackButton\n */\n\nvar AudioTrackButton = /*#__PURE__*/function (_TrackButton) {\n  _inheritsLoose(AudioTrackButton, _TrackButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options={}]\n   *        The key/value store of player options.\n   */\n  function AudioTrackButton(player, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    options.tracks = player.audioTracks();\n    return _TrackButton.call(this, player, options) || this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n\n\n  var _proto = AudioTrackButton.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-audio-button \" + _TrackButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create a menu item for each audio track\n   *\n   * @param {AudioTrackMenuItem[]} [items=[]]\n   *        An array of existing menu items to use.\n   *\n   * @return {AudioTrackMenuItem[]}\n   *         An array of menu items\n   */\n  ;\n\n  _proto.createItems = function createItems(items) {\n    if (items === void 0) {\n      items = [];\n    }\n\n    // if there's only one audio track, there no point in showing it\n    this.hideThreshold_ = 1;\n    var tracks = this.player_.audioTracks();\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i];\n      items.push(new AudioTrackMenuItem(this.player_, {\n        track: track,\n        // MenuItem is selectable\n        selectable: true,\n        // MenuItem is NOT multiSelectable (i.e. only one can be marked \"selected\" at a time)\n        multiSelectable: false\n      }));\n    }\n\n    return items;\n  };\n\n  return AudioTrackButton;\n}(TrackButton);\n/**\n * The text that should display over the `AudioTrackButton`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nAudioTrackButton.prototype.controlText_ = 'Audio Track';\nComponent$1.registerComponent('AudioTrackButton', AudioTrackButton);\n\n/**\n * The specific menu item type for selecting a playback rate.\n *\n * @extends MenuItem\n */\n\nvar PlaybackRateMenuItem = /*#__PURE__*/function (_MenuItem) {\n  _inheritsLoose(PlaybackRateMenuItem, _MenuItem);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuItem(player, options) {\n    var _this;\n\n    var label = options.rate;\n    var rate = parseFloat(label, 10); // Modify options for parent MenuItem class's init.\n\n    options.label = label;\n    options.selected = rate === player.playbackRate();\n    options.selectable = true;\n    options.multiSelectable = false;\n    _this = _MenuItem.call(this, player, options) || this;\n    _this.label = label;\n    _this.rate = rate;\n\n    _this.on(player, 'ratechange', function (e) {\n      return _this.update(e);\n    });\n\n    return _this;\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuItem` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n\n\n  var _proto = PlaybackRateMenuItem.prototype;\n\n  _proto.handleClick = function handleClick(event) {\n    _MenuItem.prototype.handleClick.call(this);\n\n    this.player().playbackRate(this.rate);\n  }\n  /**\n   * Update the PlaybackRateMenuItem when the playbackrate changes.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `ratechange` event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.update = function update(event) {\n    this.selected(this.player().playbackRate() === this.rate);\n  };\n\n  return PlaybackRateMenuItem;\n}(MenuItem);\n/**\n * The text that should display over the `PlaybackRateMenuItem`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuItem.prototype.contentElType = 'button';\nComponent$1.registerComponent('PlaybackRateMenuItem', PlaybackRateMenuItem);\n\n/**\n * The component for controlling the playback rate.\n *\n * @extends MenuButton\n */\n\nvar PlaybackRateMenuButton = /*#__PURE__*/function (_MenuButton) {\n  _inheritsLoose(PlaybackRateMenuButton, _MenuButton);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   */\n  function PlaybackRateMenuButton(player, options) {\n    var _this;\n\n    _this = _MenuButton.call(this, player, options) || this;\n\n    _this.menuButton_.el_.setAttribute('aria-describedby', _this.labelElId_);\n\n    _this.updateVisibility();\n\n    _this.updateLabel();\n\n    _this.on(player, 'loadstart', function (e) {\n      return _this.updateVisibility(e);\n    });\n\n    _this.on(player, 'ratechange', function (e) {\n      return _this.updateLabel(e);\n    });\n\n    _this.on(player, 'playbackrateschange', function (e) {\n      return _this.handlePlaybackRateschange(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n\n\n  var _proto = PlaybackRateMenuButton.prototype;\n\n  _proto.createEl = function createEl$1() {\n    var el = _MenuButton.prototype.createEl.call(this);\n\n    this.labelElId_ = 'vjs-playback-rate-value-label-' + this.id_;\n    this.labelEl_ = createEl('div', {\n      className: 'vjs-playback-rate-value',\n      id: this.labelElId_,\n      textContent: '1x'\n    });\n    el.appendChild(this.labelEl_);\n    return el;\n  };\n\n  _proto.dispose = function dispose() {\n    this.labelEl_ = null;\n\n    _MenuButton.prototype.dispose.call(this);\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  ;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildCSSClass.call(this);\n  };\n\n  _proto.buildWrapperCSSClass = function buildWrapperCSSClass() {\n    return \"vjs-playback-rate \" + _MenuButton.prototype.buildWrapperCSSClass.call(this);\n  }\n  /**\n   * Create the list of menu items. Specific to each subclass.\n   *\n   */\n  ;\n\n  _proto.createItems = function createItems() {\n    var rates = this.playbackRates();\n    var items = [];\n\n    for (var i = rates.length - 1; i >= 0; i--) {\n      items.push(new PlaybackRateMenuItem(this.player(), {\n        rate: rates[i] + 'x'\n      }));\n    }\n\n    return items;\n  }\n  /**\n   * Updates ARIA accessibility attributes\n   */\n  ;\n\n  _proto.updateARIAAttributes = function updateARIAAttributes() {\n    // Current playback rate\n    this.el().setAttribute('aria-valuenow', this.player().playbackRate());\n  }\n  /**\n   * This gets called when an `PlaybackRateMenuButton` is \"clicked\". See\n   * {@link ClickableComponent} for more detailed information on what a click can be.\n   *\n   * @param {EventTarget~Event} [event]\n   *        The `keydown`, `tap`, or `click` event that caused this function to be\n   *        called.\n   *\n   * @listens tap\n   * @listens click\n   */\n  ;\n\n  _proto.handleClick = function handleClick(event) {\n    // select next rate option\n    var currentRate = this.player().playbackRate();\n    var rates = this.playbackRates();\n    var currentIndex = rates.indexOf(currentRate); // this get the next rate and it will select first one if the last one currently selected\n\n    var newIndex = (currentIndex + 1) % rates.length;\n    this.player().playbackRate(rates[newIndex]);\n  }\n  /**\n   * On playbackrateschange, update the menu to account for the new items.\n   *\n   * @listens Player#playbackrateschange\n   */\n  ;\n\n  _proto.handlePlaybackRateschange = function handlePlaybackRateschange(event) {\n    this.update();\n  }\n  /**\n   * Get possible playback rates\n   *\n   * @return {Array}\n   *         All possible playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates() {\n    var player = this.player();\n    return player.playbackRates && player.playbackRates() || [];\n  }\n  /**\n   * Get whether playback rates is supported by the tech\n   * and an array of playback rates exists\n   *\n   * @return {boolean}\n   *         Whether changing playback rate is supported\n   */\n  ;\n\n  _proto.playbackRateSupported = function playbackRateSupported() {\n    return this.player().tech_ && this.player().tech_.featuresPlaybackRate && this.playbackRates() && this.playbackRates().length > 0;\n  }\n  /**\n   * Hide playback rate controls when they're no playback rate options to select\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#loadstart\n   */\n  ;\n\n  _proto.updateVisibility = function updateVisibility(event) {\n    if (this.playbackRateSupported()) {\n      this.removeClass('vjs-hidden');\n    } else {\n      this.addClass('vjs-hidden');\n    }\n  }\n  /**\n   * Update button label when rate changed\n   *\n   * @param {EventTarget~Event} [event]\n   *        The event that caused this function to run.\n   *\n   * @listens Player#ratechange\n   */\n  ;\n\n  _proto.updateLabel = function updateLabel(event) {\n    if (this.playbackRateSupported()) {\n      this.labelEl_.textContent = this.player().playbackRate() + 'x';\n    }\n  };\n\n  return PlaybackRateMenuButton;\n}(MenuButton);\n/**\n * The text that should display over the `FullscreenToggle`s controls. Added for localization.\n *\n * @type {string}\n * @private\n */\n\n\nPlaybackRateMenuButton.prototype.controlText_ = 'Playback Rate';\nComponent$1.registerComponent('PlaybackRateMenuButton', PlaybackRateMenuButton);\n\n/**\n * Just an empty spacer element that can be used as an append point for plugins, etc.\n * Also can be used to create space between elements when necessary.\n *\n * @extends Component\n */\n\nvar Spacer = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Spacer, _Component);\n\n  function Spacer() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = Spacer.prototype;\n\n  /**\n  * Builds the default DOM `className`.\n  *\n  * @return {string}\n  *         The DOM `className` for this object.\n  */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-spacer \" + _Component.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl(tag, props, attributes) {\n    if (tag === void 0) {\n      tag = 'div';\n    }\n\n    if (props === void 0) {\n      props = {};\n    }\n\n    if (attributes === void 0) {\n      attributes = {};\n    }\n\n    if (!props.className) {\n      props.className = this.buildCSSClass();\n    }\n\n    return _Component.prototype.createEl.call(this, tag, props, attributes);\n  };\n\n  return Spacer;\n}(Component$1);\n\nComponent$1.registerComponent('Spacer', Spacer);\n\n/**\n * Spacer specifically meant to be used as an insertion point for new plugins, etc.\n *\n * @extends Spacer\n */\n\nvar CustomControlSpacer = /*#__PURE__*/function (_Spacer) {\n  _inheritsLoose(CustomControlSpacer, _Spacer);\n\n  function CustomControlSpacer() {\n    return _Spacer.apply(this, arguments) || this;\n  }\n\n  var _proto = CustomControlSpacer.prototype;\n\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   */\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-custom-control-spacer \" + _Spacer.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    return _Spacer.prototype.createEl.call(this, 'div', {\n      className: this.buildCSSClass(),\n      // No-flex/table-cell mode requires there be some content\n      // in the cell to fill the remaining space of the table.\n      textContent: \"\\xA0\"\n    });\n  };\n\n  return CustomControlSpacer;\n}(Spacer);\n\nComponent$1.registerComponent('CustomControlSpacer', CustomControlSpacer);\n\n/**\n * Container of main controls.\n *\n * @extends Component\n */\n\nvar ControlBar = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ControlBar, _Component);\n\n  function ControlBar() {\n    return _Component.apply(this, arguments) || this;\n  }\n\n  var _proto = ControlBar.prototype;\n\n  /**\n   * Create the `Component`'s DOM element\n   *\n   * @return {Element}\n   *         The element that was created.\n   */\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'div', {\n      className: 'vjs-control-bar',\n      dir: 'ltr'\n    });\n  };\n\n  return ControlBar;\n}(Component$1);\n/**\n * Default options for `ControlBar`\n *\n * @type {Object}\n * @private\n */\n\n\nControlBar.prototype.options_ = {\n  children: ['playToggle', 'volumePanel', 'currentTimeDisplay', 'timeDivider', 'durationDisplay', 'progressControl', 'liveDisplay', 'seekToLive', 'remainingTimeDisplay', 'customControlSpacer', 'playbackRateMenuButton', 'chaptersButton', 'descriptionsButton', 'subsCapsButton', 'audioTrackButton', 'fullscreenToggle']\n};\n\nif ('exitPictureInPicture' in document) {\n  ControlBar.prototype.options_.children.splice(ControlBar.prototype.options_.children.length - 1, 0, 'pictureInPictureToggle');\n}\n\nComponent$1.registerComponent('ControlBar', ControlBar);\n\n/**\n * A display that indicates an error has occurred. This means that the video\n * is unplayable.\n *\n * @extends ModalDialog\n */\n\nvar ErrorDisplay = /*#__PURE__*/function (_ModalDialog) {\n  _inheritsLoose(ErrorDisplay, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param  {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param  {Object} [options]\n   *         The key/value store of player options.\n   */\n  function ErrorDisplay(player, options) {\n    var _this;\n\n    _this = _ModalDialog.call(this, player, options) || this;\n\n    _this.on(player, 'error', function (e) {\n      return _this.open(e);\n    });\n\n    return _this;\n  }\n  /**\n   * Builds the default DOM `className`.\n   *\n   * @return {string}\n   *         The DOM `className` for this object.\n   *\n   * @deprecated Since version 5.\n   */\n\n\n  var _proto = ErrorDisplay.prototype;\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return \"vjs-error-display \" + _ModalDialog.prototype.buildCSSClass.call(this);\n  }\n  /**\n   * Gets the localized error message based on the `Player`s error.\n   *\n   * @return {string}\n   *         The `Player`s error message localized or an empty string.\n   */\n  ;\n\n  _proto.content = function content() {\n    var error = this.player().error();\n    return error ? this.localize(error.message) : '';\n  };\n\n  return ErrorDisplay;\n}(ModalDialog);\n/**\n * The default options for an `ErrorDisplay`.\n *\n * @private\n */\n\n\nErrorDisplay.prototype.options_ = _extends({}, ModalDialog.prototype.options_, {\n  pauseOnOpen: false,\n  fillAlways: true,\n  temporary: false,\n  uncloseable: true\n});\nComponent$1.registerComponent('ErrorDisplay', ErrorDisplay);\n\nvar LOCAL_STORAGE_KEY$1 = 'vjs-text-track-settings';\nvar COLOR_BLACK = ['#000', 'Black'];\nvar COLOR_BLUE = ['#00F', 'Blue'];\nvar COLOR_CYAN = ['#0FF', 'Cyan'];\nvar COLOR_GREEN = ['#0F0', 'Green'];\nvar COLOR_MAGENTA = ['#F0F', 'Magenta'];\nvar COLOR_RED = ['#F00', 'Red'];\nvar COLOR_WHITE = ['#FFF', 'White'];\nvar COLOR_YELLOW = ['#FF0', 'Yellow'];\nvar OPACITY_OPAQUE = ['1', 'Opaque'];\nvar OPACITY_SEMI = ['0.5', 'Semi-Transparent'];\nvar OPACITY_TRANS = ['0', 'Transparent']; // Configuration for the various <select> elements in the DOM of this component.\n//\n// Possible keys include:\n//\n// `default`:\n//   The default option index. Only needs to be provided if not zero.\n// `parser`:\n//   A function which is used to parse the value from the selected option in\n//   a customized way.\n// `selector`:\n//   The selector used to find the associated <select> element.\n\nvar selectConfigs = {\n  backgroundColor: {\n    selector: '.vjs-bg-color > select',\n    id: 'captions-background-color-%s',\n    label: 'Color',\n    options: [COLOR_BLACK, COLOR_WHITE, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  backgroundOpacity: {\n    selector: '.vjs-bg-opacity > select',\n    id: 'captions-background-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI, OPACITY_TRANS]\n  },\n  color: {\n    selector: '.vjs-fg-color > select',\n    id: 'captions-foreground-color-%s',\n    label: 'Color',\n    options: [COLOR_WHITE, COLOR_BLACK, COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_YELLOW, COLOR_MAGENTA, COLOR_CYAN]\n  },\n  edgeStyle: {\n    selector: '.vjs-edge-style > select',\n    id: '%s',\n    label: 'Text Edge Style',\n    options: [['none', 'None'], ['raised', 'Raised'], ['depressed', 'Depressed'], ['uniform', 'Uniform'], ['dropshadow', 'Dropshadow']]\n  },\n  fontFamily: {\n    selector: '.vjs-font-family > select',\n    id: 'captions-font-family-%s',\n    label: 'Font Family',\n    options: [['proportionalSansSerif', 'Proportional Sans-Serif'], ['monospaceSansSerif', 'Monospace Sans-Serif'], ['proportionalSerif', 'Proportional Serif'], ['monospaceSerif', 'Monospace Serif'], ['casual', 'Casual'], ['script', 'Script'], ['small-caps', 'Small Caps']]\n  },\n  fontPercent: {\n    selector: '.vjs-font-percent > select',\n    id: 'captions-font-size-%s',\n    label: 'Font Size',\n    options: [['0.50', '50%'], ['0.75', '75%'], ['1.00', '100%'], ['1.25', '125%'], ['1.50', '150%'], ['1.75', '175%'], ['2.00', '200%'], ['3.00', '300%'], ['4.00', '400%']],\n    \"default\": 2,\n    parser: function parser(v) {\n      return v === '1.00' ? null : Number(v);\n    }\n  },\n  textOpacity: {\n    selector: '.vjs-text-opacity > select',\n    id: 'captions-foreground-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_OPAQUE, OPACITY_SEMI]\n  },\n  // Options for this object are defined below.\n  windowColor: {\n    selector: '.vjs-window-color > select',\n    id: 'captions-window-color-%s',\n    label: 'Color'\n  },\n  // Options for this object are defined below.\n  windowOpacity: {\n    selector: '.vjs-window-opacity > select',\n    id: 'captions-window-opacity-%s',\n    label: 'Transparency',\n    options: [OPACITY_TRANS, OPACITY_SEMI, OPACITY_OPAQUE]\n  }\n};\nselectConfigs.windowColor.options = selectConfigs.backgroundColor.options;\n/**\n * Get the actual value of an option.\n *\n * @param  {string} value\n *         The value to get\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\nfunction parseOptionValue(value, parser) {\n  if (parser) {\n    value = parser(value);\n  }\n\n  if (value && value !== 'none') {\n    return value;\n  }\n}\n/**\n * Gets the value of the selected <option> element within a <select> element.\n *\n * @param  {Element} el\n *         the element to look in\n *\n * @param  {Function} [parser]\n *         Optional function to adjust the value.\n *\n * @return {Mixed}\n *         - Will be `undefined` if no value exists\n *         - Will be `undefined` if the given value is \"none\".\n *         - Will be the actual value otherwise.\n *\n * @private\n */\n\n\nfunction getSelectedOptionValue(el, parser) {\n  var value = el.options[el.options.selectedIndex].value;\n  return parseOptionValue(value, parser);\n}\n/**\n * Sets the selected <option> element within a <select> element based on a\n * given value.\n *\n * @param {Element} el\n *        The element to look in.\n *\n * @param {string} value\n *        the property to look on.\n *\n * @param {Function} [parser]\n *        Optional function to adjust the value before comparing.\n *\n * @private\n */\n\n\nfunction setSelectedOption(el, value, parser) {\n  if (!value) {\n    return;\n  }\n\n  for (var i = 0; i < el.options.length; i++) {\n    if (parseOptionValue(el.options[i].value, parser) === value) {\n      el.selectedIndex = i;\n      break;\n    }\n  }\n}\n/**\n * Manipulate Text Tracks settings.\n *\n * @extends ModalDialog\n */\n\n\nvar TextTrackSettings = /*#__PURE__*/function (_ModalDialog) {\n  _inheritsLoose(TextTrackSettings, _ModalDialog);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *         The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *         The key/value store of player options.\n   */\n  function TextTrackSettings(player, options) {\n    var _this;\n\n    options.temporary = false;\n    _this = _ModalDialog.call(this, player, options) || this;\n    _this.updateDisplay = _this.updateDisplay.bind(_assertThisInitialized(_this)); // fill the modal and pretend we have opened it\n\n    _this.fill();\n\n    _this.hasBeenOpened_ = _this.hasBeenFilled_ = true;\n    _this.endDialog = createEl('p', {\n      className: 'vjs-control-text',\n      textContent: _this.localize('End of dialog window.')\n    });\n\n    _this.el().appendChild(_this.endDialog);\n\n    _this.setDefaults(); // Grab `persistTextTrackSettings` from the player options if not passed in child options\n\n\n    if (options.persistTextTrackSettings === undefined) {\n      _this.options_.persistTextTrackSettings = _this.options_.playerOptions.persistTextTrackSettings;\n    }\n\n    _this.on(_this.$('.vjs-done-button'), 'click', function () {\n      _this.saveSettings();\n\n      _this.close();\n    });\n\n    _this.on(_this.$('.vjs-default-button'), 'click', function () {\n      _this.setDefaults();\n\n      _this.updateDisplay();\n    });\n\n    each(selectConfigs, function (config) {\n      _this.on(_this.$(config.selector), 'change', _this.updateDisplay);\n    });\n\n    if (_this.options_.persistTextTrackSettings) {\n      _this.restoreSettings();\n    }\n\n    return _this;\n  }\n\n  var _proto = TextTrackSettings.prototype;\n\n  _proto.dispose = function dispose() {\n    this.endDialog = null;\n\n    _ModalDialog.prototype.dispose.call(this);\n  }\n  /**\n   * Create a <select> element with configured options.\n   *\n   * @param {string} key\n   *        Configuration key to use during creation.\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElSelect_ = function createElSelect_(key, legendId, type) {\n    var _this2 = this;\n\n    if (legendId === void 0) {\n      legendId = '';\n    }\n\n    if (type === void 0) {\n      type = 'label';\n    }\n\n    var config = selectConfigs[key];\n    var id = config.id.replace('%s', this.id_);\n    var selectLabelledbyIds = [legendId, id].join(' ').trim();\n    return [\"<\" + type + \" id=\\\"\" + id + \"\\\" class=\\\"\" + (type === 'label' ? 'vjs-label' : '') + \"\\\">\", this.localize(config.label), \"</\" + type + \">\", \"<select aria-labelledby=\\\"\" + selectLabelledbyIds + \"\\\">\"].concat(config.options.map(function (o) {\n      var optionId = id + '-' + o[1].replace(/\\W+/g, '');\n      return [\"<option id=\\\"\" + optionId + \"\\\" value=\\\"\" + o[0] + \"\\\" \", \"aria-labelledby=\\\"\" + selectLabelledbyIds + \" \" + optionId + \"\\\">\", _this2.localize(o[1]), '</option>'].join('');\n    })).concat('</select>').join('');\n  }\n  /**\n   * Create foreground color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFgColor_ = function createElFgColor_() {\n    var legendId = \"captions-text-legend-\" + this.id_;\n    return ['<fieldset class=\"vjs-fg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Text'), '</legend>', this.createElSelect_('color', legendId), '<span class=\"vjs-text-opacity vjs-opacity\">', this.createElSelect_('textOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create background color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElBgColor_ = function createElBgColor_() {\n    var legendId = \"captions-background-\" + this.id_;\n    return ['<fieldset class=\"vjs-bg-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Background'), '</legend>', this.createElSelect_('backgroundColor', legendId), '<span class=\"vjs-bg-opacity vjs-opacity\">', this.createElSelect_('backgroundOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create window color element for the component\n   *\n   * @return {string}\n   *         An HTML string.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElWinColor_ = function createElWinColor_() {\n    var legendId = \"captions-window-\" + this.id_;\n    return ['<fieldset class=\"vjs-window-color vjs-track-setting\">', \"<legend id=\\\"\" + legendId + \"\\\">\", this.localize('Window'), '</legend>', this.createElSelect_('windowColor', legendId), '<span class=\"vjs-window-opacity vjs-opacity\">', this.createElSelect_('windowOpacity', legendId), '</span>', '</fieldset>'].join('');\n  }\n  /**\n   * Create color elements for the component\n   *\n   * @return {Element}\n   *         The element that was created\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElColors_ = function createElColors_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-colors',\n      innerHTML: [this.createElFgColor_(), this.createElBgColor_(), this.createElWinColor_()].join('')\n    });\n  }\n  /**\n   * Create font elements for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElFont_ = function createElFont_() {\n    return createEl('div', {\n      className: 'vjs-track-settings-font',\n      innerHTML: ['<fieldset class=\"vjs-font-percent vjs-track-setting\">', this.createElSelect_('fontPercent', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-edge-style vjs-track-setting\">', this.createElSelect_('edgeStyle', '', 'legend'), '</fieldset>', '<fieldset class=\"vjs-font-family vjs-track-setting\">', this.createElSelect_('fontFamily', '', 'legend'), '</fieldset>'].join('')\n    });\n  }\n  /**\n   * Create controls for the component\n   *\n   * @return {Element}\n   *         The element that was created.\n   *\n   * @private\n   */\n  ;\n\n  _proto.createElControls_ = function createElControls_() {\n    var defaultsDescription = this.localize('restore all settings to the default values');\n    return createEl('div', {\n      className: 'vjs-track-settings-controls',\n      innerHTML: [\"<button type=\\\"button\\\" class=\\\"vjs-default-button\\\" title=\\\"\" + defaultsDescription + \"\\\">\", this.localize('Reset'), \"<span class=\\\"vjs-control-text\\\"> \" + defaultsDescription + \"</span>\", '</button>', \"<button type=\\\"button\\\" class=\\\"vjs-done-button\\\">\" + this.localize('Done') + \"</button>\"].join('')\n    });\n  };\n\n  _proto.content = function content() {\n    return [this.createElColors_(), this.createElFont_(), this.createElControls_()];\n  };\n\n  _proto.label = function label() {\n    return this.localize('Caption Settings Dialog');\n  };\n\n  _proto.description = function description() {\n    return this.localize('Beginning of dialog window. Escape will cancel and close the window.');\n  };\n\n  _proto.buildCSSClass = function buildCSSClass() {\n    return _ModalDialog.prototype.buildCSSClass.call(this) + ' vjs-text-track-settings';\n  }\n  /**\n   * Gets an object of text track settings (or null).\n   *\n   * @return {Object}\n   *         An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.getValues = function getValues() {\n    var _this3 = this;\n\n    return reduce(selectConfigs, function (accum, config, key) {\n      var value = getSelectedOptionValue(_this3.$(config.selector), config.parser);\n\n      if (value !== undefined) {\n        accum[key] = value;\n      }\n\n      return accum;\n    }, {});\n  }\n  /**\n   * Sets text track settings from an object of values.\n   *\n   * @param {Object} values\n   *        An object with config values parsed from the DOM or localStorage.\n   */\n  ;\n\n  _proto.setValues = function setValues(values) {\n    var _this4 = this;\n\n    each(selectConfigs, function (config, key) {\n      setSelectedOption(_this4.$(config.selector), values[key], config.parser);\n    });\n  }\n  /**\n   * Sets all `<select>` elements to their default values.\n   */\n  ;\n\n  _proto.setDefaults = function setDefaults() {\n    var _this5 = this;\n\n    each(selectConfigs, function (config) {\n      var index = config.hasOwnProperty('default') ? config[\"default\"] : 0;\n      _this5.$(config.selector).selectedIndex = index;\n    });\n  }\n  /**\n   * Restore texttrack settings from localStorage\n   */\n  ;\n\n  _proto.restoreSettings = function restoreSettings() {\n    var values;\n\n    try {\n      values = JSON.parse(window$1.localStorage.getItem(LOCAL_STORAGE_KEY$1));\n    } catch (err) {\n      log$1.warn(err);\n    }\n\n    if (values) {\n      this.setValues(values);\n    }\n  }\n  /**\n   * Save text track settings to localStorage\n   */\n  ;\n\n  _proto.saveSettings = function saveSettings() {\n    if (!this.options_.persistTextTrackSettings) {\n      return;\n    }\n\n    var values = this.getValues();\n\n    try {\n      if (Object.keys(values).length) {\n        window$1.localStorage.setItem(LOCAL_STORAGE_KEY$1, JSON.stringify(values));\n      } else {\n        window$1.localStorage.removeItem(LOCAL_STORAGE_KEY$1);\n      }\n    } catch (err) {\n      log$1.warn(err);\n    }\n  }\n  /**\n   * Update display of text track settings\n   */\n  ;\n\n  _proto.updateDisplay = function updateDisplay() {\n    var ttDisplay = this.player_.getChild('textTrackDisplay');\n\n    if (ttDisplay) {\n      ttDisplay.updateDisplay();\n    }\n  }\n  /**\n   * conditionally blur the element and refocus the captions button\n   *\n   * @private\n   */\n  ;\n\n  _proto.conditionalBlur_ = function conditionalBlur_() {\n    this.previouslyActiveEl_ = null;\n    var cb = this.player_.controlBar;\n    var subsCapsBtn = cb && cb.subsCapsButton;\n    var ccBtn = cb && cb.captionsButton;\n\n    if (subsCapsBtn) {\n      subsCapsBtn.focus();\n    } else if (ccBtn) {\n      ccBtn.focus();\n    }\n  };\n\n  return TextTrackSettings;\n}(ModalDialog);\n\nComponent$1.registerComponent('TextTrackSettings', TextTrackSettings);\n\n/**\n * A Resize Manager. It is in charge of triggering `playerresize` on the player in the right conditions.\n *\n * It'll either create an iframe and use a debounced resize handler on it or use the new {@link https://wicg.github.io/ResizeObserver/|ResizeObserver}.\n *\n * If the ResizeObserver is available natively, it will be used. A polyfill can be passed in as an option.\n * If a `playerresize` event is not needed, the ResizeManager component can be removed from the player, see the example below.\n * @example <caption>How to disable the resize manager</caption>\n * const player = videojs('#vid', {\n *   resizeManager: false\n * });\n *\n * @see {@link https://wicg.github.io/ResizeObserver/|ResizeObserver specification}\n *\n * @extends Component\n */\n\nvar ResizeManager = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(ResizeManager, _Component);\n\n  /**\n   * Create the ResizeManager.\n   *\n   * @param {Object} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of ResizeManager options.\n   *\n   * @param {Object} [options.ResizeObserver]\n   *        A polyfill for ResizeObserver can be passed in here.\n   *        If this is set to null it will ignore the native ResizeObserver and fall back to the iframe fallback.\n   */\n  function ResizeManager(player, options) {\n    var _this;\n\n    var RESIZE_OBSERVER_AVAILABLE = options.ResizeObserver || window$1.ResizeObserver; // if `null` was passed, we want to disable the ResizeObserver\n\n    if (options.ResizeObserver === null) {\n      RESIZE_OBSERVER_AVAILABLE = false;\n    } // Only create an element when ResizeObserver isn't available\n\n\n    var options_ = mergeOptions$3({\n      createEl: !RESIZE_OBSERVER_AVAILABLE,\n      reportTouchActivity: false\n    }, options);\n    _this = _Component.call(this, player, options_) || this;\n    _this.ResizeObserver = options.ResizeObserver || window$1.ResizeObserver;\n    _this.loadListener_ = null;\n    _this.resizeObserver_ = null;\n    _this.debouncedHandler_ = debounce(function () {\n      _this.resizeHandler();\n    }, 100, false, _assertThisInitialized(_this));\n\n    if (RESIZE_OBSERVER_AVAILABLE) {\n      _this.resizeObserver_ = new _this.ResizeObserver(_this.debouncedHandler_);\n\n      _this.resizeObserver_.observe(player.el());\n    } else {\n      _this.loadListener_ = function () {\n        if (!_this.el_ || !_this.el_.contentWindow) {\n          return;\n        }\n\n        var debouncedHandler_ = _this.debouncedHandler_;\n\n        var unloadListener_ = _this.unloadListener_ = function () {\n          off(this, 'resize', debouncedHandler_);\n          off(this, 'unload', unloadListener_);\n          unloadListener_ = null;\n        }; // safari and edge can unload the iframe before resizemanager dispose\n        // we have to dispose of event handlers correctly before that happens\n\n\n        on(_this.el_.contentWindow, 'unload', unloadListener_);\n        on(_this.el_.contentWindow, 'resize', debouncedHandler_);\n      };\n\n      _this.one('load', _this.loadListener_);\n    }\n\n    return _this;\n  }\n\n  var _proto = ResizeManager.prototype;\n\n  _proto.createEl = function createEl() {\n    return _Component.prototype.createEl.call(this, 'iframe', {\n      className: 'vjs-resize-manager',\n      tabIndex: -1,\n      title: this.localize('No content')\n    }, {\n      'aria-hidden': 'true'\n    });\n  }\n  /**\n   * Called when a resize is triggered on the iframe or a resize is observed via the ResizeObserver\n   *\n   * @fires Player#playerresize\n   */\n  ;\n\n  _proto.resizeHandler = function resizeHandler() {\n    /**\n     * Called when the player size has changed\n     *\n     * @event Player#playerresize\n     * @type {EventTarget~Event}\n     */\n    // make sure player is still around to trigger\n    // prevents this from causing an error after dispose\n    if (!this.player_ || !this.player_.trigger) {\n      return;\n    }\n\n    this.player_.trigger('playerresize');\n  };\n\n  _proto.dispose = function dispose() {\n    if (this.debouncedHandler_) {\n      this.debouncedHandler_.cancel();\n    }\n\n    if (this.resizeObserver_) {\n      if (this.player_.el()) {\n        this.resizeObserver_.unobserve(this.player_.el());\n      }\n\n      this.resizeObserver_.disconnect();\n    }\n\n    if (this.loadListener_) {\n      this.off('load', this.loadListener_);\n    }\n\n    if (this.el_ && this.el_.contentWindow && this.unloadListener_) {\n      this.unloadListener_.call(this.el_.contentWindow);\n    }\n\n    this.ResizeObserver = null;\n    this.resizeObserver = null;\n    this.debouncedHandler_ = null;\n    this.loadListener_ = null;\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return ResizeManager;\n}(Component$1);\n\nComponent$1.registerComponent('ResizeManager', ResizeManager);\n\nvar defaults = {\n  trackingThreshold: 20,\n  liveTolerance: 15\n};\n/*\n  track when we are at the live edge, and other helpers for live playback */\n\n/**\n * A class for checking live current time and determining when the player\n * is at or behind the live edge.\n */\n\nvar LiveTracker = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(LiveTracker, _Component);\n\n  /**\n   * Creates an instance of this class.\n   *\n   * @param {Player} player\n   *        The `Player` that this class should be attached to.\n   *\n   * @param {Object} [options]\n   *        The key/value store of player options.\n   *\n   * @param {number} [options.trackingThreshold=20]\n   *        Number of seconds of live window (seekableEnd - seekableStart) that\n   *        media needs to have before the liveui will be shown.\n   *\n   * @param {number} [options.liveTolerance=15]\n   *        Number of seconds behind live that we have to be\n   *        before we will be considered non-live. Note that this will only\n   *        be used when playing at the live edge. This allows large seekable end\n   *        changes to not effect wether we are live or not.\n   */\n  function LiveTracker(player, options) {\n    var _this;\n\n    // LiveTracker does not need an element\n    var options_ = mergeOptions$3(defaults, options, {\n      createEl: false\n    });\n    _this = _Component.call(this, player, options_) || this;\n\n    _this.handleVisibilityChange_ = function (e) {\n      return _this.handleVisibilityChange(e);\n    };\n\n    _this.trackLiveHandler_ = function () {\n      return _this.trackLive_();\n    };\n\n    _this.handlePlay_ = function (e) {\n      return _this.handlePlay(e);\n    };\n\n    _this.handleFirstTimeupdate_ = function (e) {\n      return _this.handleFirstTimeupdate(e);\n    };\n\n    _this.handleSeeked_ = function (e) {\n      return _this.handleSeeked(e);\n    };\n\n    _this.seekToLiveEdge_ = function (e) {\n      return _this.seekToLiveEdge(e);\n    };\n\n    _this.reset_();\n\n    _this.on(_this.player_, 'durationchange', function (e) {\n      return _this.handleDurationchange(e);\n    }); // we should try to toggle tracking on canplay as native playback engines, like Safari\n    // may not have the proper values for things like seekableEnd until then\n\n\n    _this.on(_this.player_, 'canplay', function () {\n      return _this.toggleTracking();\n    }); // we don't need to track live playback if the document is hidden,\n    // also, tracking when the document is hidden can\n    // cause the CPU to spike and eventually crash the page on IE11.\n\n\n    if (IE_VERSION && 'hidden' in document && 'visibilityState' in document) {\n      _this.on(document, 'visibilitychange', _this.handleVisibilityChange_);\n    }\n\n    return _this;\n  }\n  /**\n   * toggle tracking based on document visiblility\n   */\n\n\n  var _proto = LiveTracker.prototype;\n\n  _proto.handleVisibilityChange = function handleVisibilityChange() {\n    if (this.player_.duration() !== Infinity) {\n      return;\n    }\n\n    if (document.hidden) {\n      this.stopTracking();\n    } else {\n      this.startTracking();\n    }\n  }\n  /**\n   * all the functionality for tracking when seek end changes\n   * and for tracking how far past seek end we should be\n   */\n  ;\n\n  _proto.trackLive_ = function trackLive_() {\n    var seekable = this.player_.seekable(); // skip undefined seekable\n\n    if (!seekable || !seekable.length) {\n      return;\n    }\n\n    var newTime = Number(window$1.performance.now().toFixed(4));\n    var deltaTime = this.lastTime_ === -1 ? 0 : (newTime - this.lastTime_) / 1000;\n    this.lastTime_ = newTime;\n    this.pastSeekEnd_ = this.pastSeekEnd() + deltaTime;\n    var liveCurrentTime = this.liveCurrentTime();\n    var currentTime = this.player_.currentTime(); // we are behind live if any are true\n    // 1. the player is paused\n    // 2. the user seeked to a location 2 seconds away from live\n    // 3. the difference between live and current time is greater\n    //    liveTolerance which defaults to 15s\n\n    var isBehind = this.player_.paused() || this.seekedBehindLive_ || Math.abs(liveCurrentTime - currentTime) > this.options_.liveTolerance; // we cannot be behind if\n    // 1. until we have not seen a timeupdate yet\n    // 2. liveCurrentTime is Infinity, which happens on Android and Native Safari\n\n    if (!this.timeupdateSeen_ || liveCurrentTime === Infinity) {\n      isBehind = false;\n    }\n\n    if (isBehind !== this.behindLiveEdge_) {\n      this.behindLiveEdge_ = isBehind;\n      this.trigger('liveedgechange');\n    }\n  }\n  /**\n   * handle a durationchange event on the player\n   * and start/stop tracking accordingly.\n   */\n  ;\n\n  _proto.handleDurationchange = function handleDurationchange() {\n    this.toggleTracking();\n  }\n  /**\n   * start/stop tracking\n   */\n  ;\n\n  _proto.toggleTracking = function toggleTracking() {\n    if (this.player_.duration() === Infinity && this.liveWindow() >= this.options_.trackingThreshold) {\n      if (this.player_.options_.liveui) {\n        this.player_.addClass('vjs-liveui');\n      }\n\n      this.startTracking();\n    } else {\n      this.player_.removeClass('vjs-liveui');\n      this.stopTracking();\n    }\n  }\n  /**\n   * start tracking live playback\n   */\n  ;\n\n  _proto.startTracking = function startTracking() {\n    if (this.isTracking()) {\n      return;\n    } // If we haven't seen a timeupdate, we need to check whether playback\n    // began before this component started tracking. This can happen commonly\n    // when using autoplay.\n\n\n    if (!this.timeupdateSeen_) {\n      this.timeupdateSeen_ = this.player_.hasStarted();\n    }\n\n    this.trackingInterval_ = this.setInterval(this.trackLiveHandler_, UPDATE_REFRESH_INTERVAL);\n    this.trackLive_();\n    this.on(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n\n    if (!this.timeupdateSeen_) {\n      this.one(this.player_, 'play', this.handlePlay_);\n      this.one(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n    } else {\n      this.on(this.player_, 'seeked', this.handleSeeked_);\n    }\n  }\n  /**\n   * handle the first timeupdate on the player if it wasn't already playing\n   * when live tracker started tracking.\n   */\n  ;\n\n  _proto.handleFirstTimeupdate = function handleFirstTimeupdate() {\n    this.timeupdateSeen_ = true;\n    this.on(this.player_, 'seeked', this.handleSeeked_);\n  }\n  /**\n   * Keep track of what time a seek starts, and listen for seeked\n   * to find where a seek ends.\n   */\n  ;\n\n  _proto.handleSeeked = function handleSeeked() {\n    var timeDiff = Math.abs(this.liveCurrentTime() - this.player_.currentTime());\n    this.seekedBehindLive_ = this.nextSeekedFromUser_ && timeDiff > 2;\n    this.nextSeekedFromUser_ = false;\n    this.trackLive_();\n  }\n  /**\n   * handle the first play on the player, and make sure that we seek\n   * right to the live edge.\n   */\n  ;\n\n  _proto.handlePlay = function handlePlay() {\n    this.one(this.player_, 'timeupdate', this.seekToLiveEdge_);\n  }\n  /**\n   * Stop tracking, and set all internal variables to\n   * their initial value.\n   */\n  ;\n\n  _proto.reset_ = function reset_() {\n    this.lastTime_ = -1;\n    this.pastSeekEnd_ = 0;\n    this.lastSeekEnd_ = -1;\n    this.behindLiveEdge_ = true;\n    this.timeupdateSeen_ = false;\n    this.seekedBehindLive_ = false;\n    this.nextSeekedFromUser_ = false;\n    this.clearInterval(this.trackingInterval_);\n    this.trackingInterval_ = null;\n    this.off(this.player_, ['play', 'pause'], this.trackLiveHandler_);\n    this.off(this.player_, 'seeked', this.handleSeeked_);\n    this.off(this.player_, 'play', this.handlePlay_);\n    this.off(this.player_, 'timeupdate', this.handleFirstTimeupdate_);\n    this.off(this.player_, 'timeupdate', this.seekToLiveEdge_);\n  }\n  /**\n   * The next seeked event is from the user. Meaning that any seek\n   * > 2s behind live will be considered behind live for real and\n   * liveTolerance will be ignored.\n   */\n  ;\n\n  _proto.nextSeekedFromUser = function nextSeekedFromUser() {\n    this.nextSeekedFromUser_ = true;\n  }\n  /**\n   * stop tracking live playback\n   */\n  ;\n\n  _proto.stopTracking = function stopTracking() {\n    if (!this.isTracking()) {\n      return;\n    }\n\n    this.reset_();\n    this.trigger('liveedgechange');\n  }\n  /**\n   * A helper to get the player seekable end\n   * so that we don't have to null check everywhere\n   *\n   * @return {number}\n   *         The furthest seekable end or Infinity.\n   */\n  ;\n\n  _proto.seekableEnd = function seekableEnd() {\n    var seekable = this.player_.seekable();\n    var seekableEnds = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableEnds.push(seekable.end(i));\n    } // grab the furthest seekable end after sorting, or if there are none\n    // default to Infinity\n\n\n    return seekableEnds.length ? seekableEnds.sort()[seekableEnds.length - 1] : Infinity;\n  }\n  /**\n   * A helper to get the player seekable start\n   * so that we don't have to null check everywhere\n   *\n   * @return {number}\n   *         The earliest seekable start or 0.\n   */\n  ;\n\n  _proto.seekableStart = function seekableStart() {\n    var seekable = this.player_.seekable();\n    var seekableStarts = [];\n    var i = seekable ? seekable.length : 0;\n\n    while (i--) {\n      seekableStarts.push(seekable.start(i));\n    } // grab the first seekable start after sorting, or if there are none\n    // default to 0\n\n\n    return seekableStarts.length ? seekableStarts.sort()[0] : 0;\n  }\n  /**\n   * Get the live time window aka\n   * the amount of time between seekable start and\n   * live current time.\n   *\n   * @return {number}\n   *         The amount of seconds that are seekable in\n   *         the live video.\n   */\n  ;\n\n  _proto.liveWindow = function liveWindow() {\n    var liveCurrentTime = this.liveCurrentTime(); // if liveCurrenTime is Infinity then we don't have a liveWindow at all\n\n    if (liveCurrentTime === Infinity) {\n      return 0;\n    }\n\n    return liveCurrentTime - this.seekableStart();\n  }\n  /**\n   * Determines if the player is live, only checks if this component\n   * is tracking live playback or not\n   *\n   * @return {boolean}\n   *         Wether liveTracker is tracking\n   */\n  ;\n\n  _proto.isLive = function isLive() {\n    return this.isTracking();\n  }\n  /**\n   * Determines if currentTime is at the live edge and won't fall behind\n   * on each seekableendchange\n   *\n   * @return {boolean}\n   *         Wether playback is at the live edge\n   */\n  ;\n\n  _proto.atLiveEdge = function atLiveEdge() {\n    return !this.behindLiveEdge();\n  }\n  /**\n   * get what we expect the live current time to be\n   *\n   * @return {number}\n   *         The expected live current time\n   */\n  ;\n\n  _proto.liveCurrentTime = function liveCurrentTime() {\n    return this.pastSeekEnd() + this.seekableEnd();\n  }\n  /**\n   * The number of seconds that have occured after seekable end\n   * changed. This will be reset to 0 once seekable end changes.\n   *\n   * @return {number}\n   *         Seconds past the current seekable end\n   */\n  ;\n\n  _proto.pastSeekEnd = function pastSeekEnd() {\n    var seekableEnd = this.seekableEnd();\n\n    if (this.lastSeekEnd_ !== -1 && seekableEnd !== this.lastSeekEnd_) {\n      this.pastSeekEnd_ = 0;\n    }\n\n    this.lastSeekEnd_ = seekableEnd;\n    return this.pastSeekEnd_;\n  }\n  /**\n   * If we are currently behind the live edge, aka currentTime will be\n   * behind on a seekableendchange\n   *\n   * @return {boolean}\n   *         If we are behind the live edge\n   */\n  ;\n\n  _proto.behindLiveEdge = function behindLiveEdge() {\n    return this.behindLiveEdge_;\n  }\n  /**\n   * Wether live tracker is currently tracking or not.\n   */\n  ;\n\n  _proto.isTracking = function isTracking() {\n    return typeof this.trackingInterval_ === 'number';\n  }\n  /**\n   * Seek to the live edge if we are behind the live edge\n   */\n  ;\n\n  _proto.seekToLiveEdge = function seekToLiveEdge() {\n    this.seekedBehindLive_ = false;\n\n    if (this.atLiveEdge()) {\n      return;\n    }\n\n    this.nextSeekedFromUser_ = false;\n    this.player_.currentTime(this.liveCurrentTime());\n  }\n  /**\n   * Dispose of liveTracker\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.off(document, 'visibilitychange', this.handleVisibilityChange_);\n    this.stopTracking();\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  return LiveTracker;\n}(Component$1);\n\nComponent$1.registerComponent('LiveTracker', LiveTracker);\n\n/**\n * This function is used to fire a sourceset when there is something\n * similar to `mediaEl.load()` being called. It will try to find the source via\n * the `src` attribute and then the `<source>` elements. It will then fire `sourceset`\n * with the source that was found or empty string if we cannot know. If it cannot\n * find a source then `sourceset` will not be fired.\n *\n * @param {Html5} tech\n *        The tech object that sourceset was setup on\n *\n * @return {boolean}\n *         returns false if the sourceset was not fired and true otherwise.\n */\n\nvar sourcesetLoad = function sourcesetLoad(tech) {\n  var el = tech.el(); // if `el.src` is set, that source will be loaded.\n\n  if (el.hasAttribute('src')) {\n    tech.triggerSourceset(el.src);\n    return true;\n  }\n  /**\n   * Since there isn't a src property on the media element, source elements will be used for\n   * implementing the source selection algorithm. This happens asynchronously and\n   * for most cases were there is more than one source we cannot tell what source will\n   * be loaded, without re-implementing the source selection algorithm. At this time we are not\n   * going to do that. There are three special cases that we do handle here though:\n   *\n   * 1. If there are no sources, do not fire `sourceset`.\n   * 2. If there is only one `<source>` with a `src` property/attribute that is our `src`\n   * 3. If there is more than one `<source>` but all of them have the same `src` url.\n   *    That will be our src.\n   */\n\n\n  var sources = tech.$$('source');\n  var srcUrls = [];\n  var src = ''; // if there are no sources, do not fire sourceset\n\n  if (!sources.length) {\n    return false;\n  } // only count valid/non-duplicate source elements\n\n\n  for (var i = 0; i < sources.length; i++) {\n    var url = sources[i].src;\n\n    if (url && srcUrls.indexOf(url) === -1) {\n      srcUrls.push(url);\n    }\n  } // there were no valid sources\n\n\n  if (!srcUrls.length) {\n    return false;\n  } // there is only one valid source element url\n  // use that\n\n\n  if (srcUrls.length === 1) {\n    src = srcUrls[0];\n  }\n\n  tech.triggerSourceset(src);\n  return true;\n};\n/**\n * our implementation of an `innerHTML` descriptor for browsers\n * that do not have one.\n */\n\n\nvar innerHTMLDescriptorPolyfill = Object.defineProperty({}, 'innerHTML', {\n  get: function get() {\n    return this.cloneNode(true).innerHTML;\n  },\n  set: function set(v) {\n    // make a dummy node to use innerHTML on\n    var dummy = document.createElement(this.nodeName.toLowerCase()); // set innerHTML to the value provided\n\n    dummy.innerHTML = v; // make a document fragment to hold the nodes from dummy\n\n    var docFrag = document.createDocumentFragment(); // copy all of the nodes created by the innerHTML on dummy\n    // to the document fragment\n\n    while (dummy.childNodes.length) {\n      docFrag.appendChild(dummy.childNodes[0]);\n    } // remove content\n\n\n    this.innerText = ''; // now we add all of that html in one by appending the\n    // document fragment. This is how innerHTML does it.\n\n    window$1.Element.prototype.appendChild.call(this, docFrag); // then return the result that innerHTML's setter would\n\n    return this.innerHTML;\n  }\n});\n/**\n * Get a property descriptor given a list of priorities and the\n * property to get.\n */\n\nvar getDescriptor = function getDescriptor(priority, prop) {\n  var descriptor = {};\n\n  for (var i = 0; i < priority.length; i++) {\n    descriptor = Object.getOwnPropertyDescriptor(priority[i], prop);\n\n    if (descriptor && descriptor.set && descriptor.get) {\n      break;\n    }\n  }\n\n  descriptor.enumerable = true;\n  descriptor.configurable = true;\n  return descriptor;\n};\n\nvar getInnerHTMLDescriptor = function getInnerHTMLDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, window$1.Element.prototype, innerHTMLDescriptorPolyfill], 'innerHTML');\n};\n/**\n * Patches browser internal functions so that we can tell synchronously\n * if a `<source>` was appended to the media element. For some reason this\n * causes a `sourceset` if the the media element is ready and has no source.\n * This happens when:\n * - The page has just loaded and the media element does not have a source.\n * - The media element was emptied of all sources, then `load()` was called.\n *\n * It does this by patching the following functions/properties when they are supported:\n *\n * - `append()` - can be used to add a `<source>` element to the media element\n * - `appendChild()` - can be used to add a `<source>` element to the media element\n * - `insertAdjacentHTML()` -  can be used to add a `<source>` element to the media element\n * - `innerHTML` -  can be used to add a `<source>` element to the media element\n *\n * @param {Html5} tech\n *        The tech object that sourceset is being setup on.\n */\n\n\nvar firstSourceWatch = function firstSourceWatch(tech) {\n  var el = tech.el(); // make sure firstSourceWatch isn't setup twice.\n\n  if (el.resetSourceWatch_) {\n    return;\n  }\n\n  var old = {};\n  var innerDescriptor = getInnerHTMLDescriptor(tech);\n\n  var appendWrapper = function appendWrapper(appendFn) {\n    return function () {\n      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n        args[_key] = arguments[_key];\n      }\n\n      var retval = appendFn.apply(el, args);\n      sourcesetLoad(tech);\n      return retval;\n    };\n  };\n\n  ['append', 'appendChild', 'insertAdjacentHTML'].forEach(function (k) {\n    if (!el[k]) {\n      return;\n    } // store the old function\n\n\n    old[k] = el[k]; // call the old function with a sourceset if a source\n    // was loaded\n\n    el[k] = appendWrapper(old[k]);\n  });\n  Object.defineProperty(el, 'innerHTML', mergeOptions$3(innerDescriptor, {\n    set: appendWrapper(innerDescriptor.set)\n  }));\n\n  el.resetSourceWatch_ = function () {\n    el.resetSourceWatch_ = null;\n    Object.keys(old).forEach(function (k) {\n      el[k] = old[k];\n    });\n    Object.defineProperty(el, 'innerHTML', innerDescriptor);\n  }; // on the first sourceset, we need to revert our changes\n\n\n  tech.one('sourceset', el.resetSourceWatch_);\n};\n/**\n * our implementation of a `src` descriptor for browsers\n * that do not have one.\n */\n\n\nvar srcDescriptorPolyfill = Object.defineProperty({}, 'src', {\n  get: function get() {\n    if (this.hasAttribute('src')) {\n      return getAbsoluteURL(window$1.Element.prototype.getAttribute.call(this, 'src'));\n    }\n\n    return '';\n  },\n  set: function set(v) {\n    window$1.Element.prototype.setAttribute.call(this, 'src', v);\n    return v;\n  }\n});\n\nvar getSrcDescriptor = function getSrcDescriptor(tech) {\n  return getDescriptor([tech.el(), window$1.HTMLMediaElement.prototype, srcDescriptorPolyfill], 'src');\n};\n/**\n * setup `sourceset` handling on the `Html5` tech. This function\n * patches the following element properties/functions:\n *\n * - `src` - to determine when `src` is set\n * - `setAttribute()` - to determine when `src` is set\n * - `load()` - this re-triggers the source selection algorithm, and can\n *              cause a sourceset.\n *\n * If there is no source when we are adding `sourceset` support or during a `load()`\n * we also patch the functions listed in `firstSourceWatch`.\n *\n * @param {Html5} tech\n *        The tech to patch\n */\n\n\nvar setupSourceset = function setupSourceset(tech) {\n  if (!tech.featuresSourceset) {\n    return;\n  }\n\n  var el = tech.el(); // make sure sourceset isn't setup twice.\n\n  if (el.resetSourceset_) {\n    return;\n  }\n\n  var srcDescriptor = getSrcDescriptor(tech);\n  var oldSetAttribute = el.setAttribute;\n  var oldLoad = el.load;\n  Object.defineProperty(el, 'src', mergeOptions$3(srcDescriptor, {\n    set: function set(v) {\n      var retval = srcDescriptor.set.call(el, v); // we use the getter here to get the actual value set on src\n\n      tech.triggerSourceset(el.src);\n      return retval;\n    }\n  }));\n\n  el.setAttribute = function (n, v) {\n    var retval = oldSetAttribute.call(el, n, v);\n\n    if (/src/i.test(n)) {\n      tech.triggerSourceset(el.src);\n    }\n\n    return retval;\n  };\n\n  el.load = function () {\n    var retval = oldLoad.call(el); // if load was called, but there was no source to fire\n    // sourceset on. We have to watch for a source append\n    // as that can trigger a `sourceset` when the media element\n    // has no source\n\n    if (!sourcesetLoad(tech)) {\n      tech.triggerSourceset('');\n      firstSourceWatch(tech);\n    }\n\n    return retval;\n  };\n\n  if (el.currentSrc) {\n    tech.triggerSourceset(el.currentSrc);\n  } else if (!sourcesetLoad(tech)) {\n    firstSourceWatch(tech);\n  }\n\n  el.resetSourceset_ = function () {\n    el.resetSourceset_ = null;\n    el.load = oldLoad;\n    el.setAttribute = oldSetAttribute;\n    Object.defineProperty(el, 'src', srcDescriptor);\n\n    if (el.resetSourceWatch_) {\n      el.resetSourceWatch_();\n    }\n  };\n};\n\n/**\n * Object.defineProperty but \"lazy\", which means that the value is only set after\n * it retrieved the first time, rather than being set right away.\n *\n * @param {Object} obj the object to set the property on\n * @param {string} key the key for the property to set\n * @param {Function} getValue the function used to get the value when it is needed.\n * @param {boolean} setter wether a setter shoould be allowed or not\n */\nvar defineLazyProperty = function defineLazyProperty(obj, key, getValue, setter) {\n  if (setter === void 0) {\n    setter = true;\n  }\n\n  var set = function set(value) {\n    return Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      writable: true\n    });\n  };\n\n  var options = {\n    configurable: true,\n    enumerable: true,\n    get: function get() {\n      var value = getValue();\n      set(value);\n      return value;\n    }\n  };\n\n  if (setter) {\n    options.set = set;\n  }\n\n  return Object.defineProperty(obj, key, options);\n};\n\n/**\n * HTML5 Media Controller - Wrapper for HTML5 Media API\n *\n * @mixes Tech~SourceHandlerAdditions\n * @extends Tech\n */\n\nvar Html5 = /*#__PURE__*/function (_Tech) {\n  _inheritsLoose(Html5, _Tech);\n\n  /**\n  * Create an instance of this Tech.\n  *\n  * @param {Object} [options]\n  *        The key/value store of player options.\n  *\n  * @param {Component~ReadyCallback} ready\n  *        Callback function to call when the `HTML5` Tech is ready.\n  */\n  function Html5(options, ready) {\n    var _this;\n\n    _this = _Tech.call(this, options, ready) || this;\n    var source = options.source;\n    var crossoriginTracks = false;\n    _this.featuresVideoFrameCallback = _this.featuresVideoFrameCallback && _this.el_.tagName === 'VIDEO'; // Set the source if one is provided\n    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)\n    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source\n    // anyway so the error gets fired.\n\n    if (source && (_this.el_.currentSrc !== source.src || options.tag && options.tag.initNetworkState_ === 3)) {\n      _this.setSource(source);\n    } else {\n      _this.handleLateInit_(_this.el_);\n    } // setup sourceset after late sourceset/init\n\n\n    if (options.enableSourceset) {\n      _this.setupSourcesetHandling_();\n    }\n\n    _this.isScrubbing_ = false;\n\n    if (_this.el_.hasChildNodes()) {\n      var nodes = _this.el_.childNodes;\n      var nodesLength = nodes.length;\n      var removeNodes = [];\n\n      while (nodesLength--) {\n        var node = nodes[nodesLength];\n        var nodeName = node.nodeName.toLowerCase();\n\n        if (nodeName === 'track') {\n          if (!_this.featuresNativeTextTracks) {\n            // Empty video tag tracks so the built-in player doesn't use them also.\n            // This may not be fast enough to stop HTML5 browsers from reading the tags\n            // so we'll need to turn off any default tracks if we're manually doing\n            // captions and subtitles. videoElement.textTracks\n            removeNodes.push(node);\n          } else {\n            // store HTMLTrackElement and TextTrack to remote list\n            _this.remoteTextTrackEls().addTrackElement_(node);\n\n            _this.remoteTextTracks().addTrack(node.track);\n\n            _this.textTracks().addTrack(node.track);\n\n            if (!crossoriginTracks && !_this.el_.hasAttribute('crossorigin') && isCrossOrigin(node.src)) {\n              crossoriginTracks = true;\n            }\n          }\n        }\n      }\n\n      for (var i = 0; i < removeNodes.length; i++) {\n        _this.el_.removeChild(removeNodes[i]);\n      }\n    }\n\n    _this.proxyNativeTracks_();\n\n    if (_this.featuresNativeTextTracks && crossoriginTracks) {\n      log$1.warn('Text Tracks are being loaded from another origin but the crossorigin attribute isn\\'t used.\\n' + 'This may prevent text tracks from loading.');\n    } // prevent iOS Safari from disabling metadata text tracks during native playback\n\n\n    _this.restoreMetadataTracksInIOSNativePlayer_(); // Determine if native controls should be used\n    // Our goal should be to get the custom controls on mobile solid everywhere\n    // so we can remove this all together. Right now this will block custom\n    // controls on touch enabled laptops like the Chrome Pixel\n\n\n    if ((TOUCH_ENABLED || IS_IPHONE || IS_NATIVE_ANDROID) && options.nativeControlsForTouch === true) {\n      _this.setControls(true);\n    } // on iOS, we want to proxy `webkitbeginfullscreen` and `webkitendfullscreen`\n    // into a `fullscreenchange` event\n\n\n    _this.proxyWebkitFullscreen_();\n\n    _this.triggerReady();\n\n    return _this;\n  }\n  /**\n   * Dispose of `HTML5` media element and remove all tracks.\n   */\n\n\n  var _proto = Html5.prototype;\n\n  _proto.dispose = function dispose() {\n    if (this.el_ && this.el_.resetSourceset_) {\n      this.el_.resetSourceset_();\n    }\n\n    Html5.disposeMediaElement(this.el_);\n    this.options_ = null; // tech will handle clearing of the emulated track list\n\n    _Tech.prototype.dispose.call(this);\n  }\n  /**\n   * Modify the media element so that we can detect when\n   * the source is changed. Fires `sourceset` just after the source has changed\n   */\n  ;\n\n  _proto.setupSourcesetHandling_ = function setupSourcesetHandling_() {\n    setupSourceset(this);\n  }\n  /**\n   * When a captions track is enabled in the iOS Safari native player, all other\n   * tracks are disabled (including metadata tracks), which nulls all of their\n   * associated cue points. This will restore metadata tracks to their pre-fullscreen\n   * state in those cases so that cue points are not needlessly lost.\n   *\n   * @private\n   */\n  ;\n\n  _proto.restoreMetadataTracksInIOSNativePlayer_ = function restoreMetadataTracksInIOSNativePlayer_() {\n    var textTracks = this.textTracks();\n    var metadataTracksPreFullscreenState; // captures a snapshot of every metadata track's current state\n\n    var takeMetadataTrackSnapshot = function takeMetadataTrackSnapshot() {\n      metadataTracksPreFullscreenState = [];\n\n      for (var i = 0; i < textTracks.length; i++) {\n        var track = textTracks[i];\n\n        if (track.kind === 'metadata') {\n          metadataTracksPreFullscreenState.push({\n            track: track,\n            storedMode: track.mode\n          });\n        }\n      }\n    }; // snapshot each metadata track's initial state, and update the snapshot\n    // each time there is a track 'change' event\n\n\n    takeMetadataTrackSnapshot();\n    textTracks.addEventListener('change', takeMetadataTrackSnapshot);\n    this.on('dispose', function () {\n      return textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n    });\n\n    var restoreTrackMode = function restoreTrackMode() {\n      for (var i = 0; i < metadataTracksPreFullscreenState.length; i++) {\n        var storedTrack = metadataTracksPreFullscreenState[i];\n\n        if (storedTrack.track.mode === 'disabled' && storedTrack.track.mode !== storedTrack.storedMode) {\n          storedTrack.track.mode = storedTrack.storedMode;\n        }\n      } // we only want this handler to be executed on the first 'change' event\n\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    }; // when we enter fullscreen playback, stop updating the snapshot and\n    // restore all track modes to their pre-fullscreen state\n\n\n    this.on('webkitbeginfullscreen', function () {\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot); // remove the listener before adding it just in case it wasn't previously removed\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n      textTracks.addEventListener('change', restoreTrackMode);\n    }); // start updating the snapshot again after leaving fullscreen\n\n    this.on('webkitendfullscreen', function () {\n      // remove the listener before adding it just in case it wasn't previously removed\n      textTracks.removeEventListener('change', takeMetadataTrackSnapshot);\n      textTracks.addEventListener('change', takeMetadataTrackSnapshot); // remove the restoreTrackMode handler in case it wasn't triggered during fullscreen playback\n\n      textTracks.removeEventListener('change', restoreTrackMode);\n    });\n  }\n  /**\n   * Attempt to force override of tracks for the given type\n   *\n   * @param {string} type - Track type to override, possible values include 'Audio',\n   * 'Video', and 'Text'.\n   * @param {boolean} override - If set to true native audio/video will be overridden,\n   * otherwise native audio/video will potentially be used.\n   * @private\n   */\n  ;\n\n  _proto.overrideNative_ = function overrideNative_(type, override) {\n    var _this2 = this;\n\n    // If there is no behavioral change don't add/remove listeners\n    if (override !== this[\"featuresNative\" + type + \"Tracks\"]) {\n      return;\n    }\n\n    var lowerCaseType = type.toLowerCase();\n\n    if (this[lowerCaseType + \"TracksListeners_\"]) {\n      Object.keys(this[lowerCaseType + \"TracksListeners_\"]).forEach(function (eventName) {\n        var elTracks = _this2.el()[lowerCaseType + \"Tracks\"];\n\n        elTracks.removeEventListener(eventName, _this2[lowerCaseType + \"TracksListeners_\"][eventName]);\n      });\n    }\n\n    this[\"featuresNative\" + type + \"Tracks\"] = !override;\n    this[lowerCaseType + \"TracksListeners_\"] = null;\n    this.proxyNativeTracksForType_(lowerCaseType);\n  }\n  /**\n   * Attempt to force override of native audio tracks.\n   *\n   * @param {boolean} override - If set to true native audio will be overridden,\n   * otherwise native audio will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeAudioTracks = function overrideNativeAudioTracks(override) {\n    this.overrideNative_('Audio', override);\n  }\n  /**\n   * Attempt to force override of native video tracks.\n   *\n   * @param {boolean} override - If set to true native video will be overridden,\n   * otherwise native video will potentially be used.\n   */\n  ;\n\n  _proto.overrideNativeVideoTracks = function overrideNativeVideoTracks(override) {\n    this.overrideNative_('Video', override);\n  }\n  /**\n   * Proxy native track list events for the given type to our track\n   * lists if the browser we are playing in supports that type of track list.\n   *\n   * @param {string} name - Track type; values include 'audio', 'video', and 'text'\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracksForType_ = function proxyNativeTracksForType_(name) {\n    var _this3 = this;\n\n    var props = NORMAL[name];\n    var elTracks = this.el()[props.getterName];\n    var techTracks = this[props.getterName]();\n\n    if (!this[\"featuresNative\" + props.capitalName + \"Tracks\"] || !elTracks || !elTracks.addEventListener) {\n      return;\n    }\n\n    var listeners = {\n      change: function change(e) {\n        var event = {\n          type: 'change',\n          target: techTracks,\n          currentTarget: techTracks,\n          srcElement: techTracks\n        };\n        techTracks.trigger(event); // if we are a text track change event, we should also notify the\n        // remote text track list. This can potentially cause a false positive\n        // if we were to get a change event on a non-remote track and\n        // we triggered the event on the remote text track list which doesn't\n        // contain that track. However, best practices mean looping through the\n        // list of tracks and searching for the appropriate mode value, so,\n        // this shouldn't pose an issue\n\n        if (name === 'text') {\n          _this3[REMOTE.remoteText.getterName]().trigger(event);\n        }\n      },\n      addtrack: function addtrack(e) {\n        techTracks.addTrack(e.track);\n      },\n      removetrack: function removetrack(e) {\n        techTracks.removeTrack(e.track);\n      }\n    };\n\n    var removeOldTracks = function removeOldTracks() {\n      var removeTracks = [];\n\n      for (var i = 0; i < techTracks.length; i++) {\n        var found = false;\n\n        for (var j = 0; j < elTracks.length; j++) {\n          if (elTracks[j] === techTracks[i]) {\n            found = true;\n            break;\n          }\n        }\n\n        if (!found) {\n          removeTracks.push(techTracks[i]);\n        }\n      }\n\n      while (removeTracks.length) {\n        techTracks.removeTrack(removeTracks.shift());\n      }\n    };\n\n    this[props.getterName + 'Listeners_'] = listeners;\n    Object.keys(listeners).forEach(function (eventName) {\n      var listener = listeners[eventName];\n      elTracks.addEventListener(eventName, listener);\n\n      _this3.on('dispose', function (e) {\n        return elTracks.removeEventListener(eventName, listener);\n      });\n    }); // Remove (native) tracks that are not used anymore\n\n    this.on('loadstart', removeOldTracks);\n    this.on('dispose', function (e) {\n      return _this3.off('loadstart', removeOldTracks);\n    });\n  }\n  /**\n   * Proxy all native track list events to our track lists if the browser we are playing\n   * in supports that type of track list.\n   *\n   * @private\n   */\n  ;\n\n  _proto.proxyNativeTracks_ = function proxyNativeTracks_() {\n    var _this4 = this;\n\n    NORMAL.names.forEach(function (name) {\n      _this4.proxyNativeTracksForType_(name);\n    });\n  }\n  /**\n   * Create the `Html5` Tech's DOM element.\n   *\n   * @return {Element}\n   *         The element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var el = this.options_.tag; // Check if this browser supports moving the element into the box.\n    // On the iPhone video will break if you move the element,\n    // So we have to create a brand new element.\n    // If we ingested the player div, we do not need to move the media element.\n\n    if (!el || !(this.options_.playerElIngest || this.movingMediaElementInDOM)) {\n      // If the original tag is still there, clone and remove it.\n      if (el) {\n        var clone = el.cloneNode(true);\n\n        if (el.parentNode) {\n          el.parentNode.insertBefore(clone, el);\n        }\n\n        Html5.disposeMediaElement(el);\n        el = clone;\n      } else {\n        el = document.createElement('video'); // determine if native controls should be used\n\n        var tagAttributes = this.options_.tag && getAttributes(this.options_.tag);\n        var attributes = mergeOptions$3({}, tagAttributes);\n\n        if (!TOUCH_ENABLED || this.options_.nativeControlsForTouch !== true) {\n          delete attributes.controls;\n        }\n\n        setAttributes(el, assign(attributes, {\n          id: this.options_.techId,\n          \"class\": 'vjs-tech'\n        }));\n      }\n\n      el.playerId = this.options_.playerId;\n    }\n\n    if (typeof this.options_.preload !== 'undefined') {\n      setAttribute(el, 'preload', this.options_.preload);\n    }\n\n    if (this.options_.disablePictureInPicture !== undefined) {\n      el.disablePictureInPicture = this.options_.disablePictureInPicture;\n    } // Update specific tag settings, in case they were overridden\n    // `autoplay` has to be *last* so that `muted` and `playsinline` are present\n    // when iOS/Safari or other browsers attempt to autoplay.\n\n\n    var settingsAttrs = ['loop', 'muted', 'playsinline', 'autoplay'];\n\n    for (var i = 0; i < settingsAttrs.length; i++) {\n      var attr = settingsAttrs[i];\n      var value = this.options_[attr];\n\n      if (typeof value !== 'undefined') {\n        if (value) {\n          setAttribute(el, attr, attr);\n        } else {\n          removeAttribute(el, attr);\n        }\n\n        el[attr] = value;\n      }\n    }\n\n    return el;\n  }\n  /**\n   * This will be triggered if the loadstart event has already fired, before videojs was\n   * ready. Two known examples of when this can happen are:\n   * 1. If we're loading the playback object after it has started loading\n   * 2. The media is already playing the (often with autoplay on) then\n   *\n   * This function will fire another loadstart so that videojs can catchup.\n   *\n   * @fires Tech#loadstart\n   *\n   * @return {undefined}\n   *         returns nothing.\n   */\n  ;\n\n  _proto.handleLateInit_ = function handleLateInit_(el) {\n    if (el.networkState === 0 || el.networkState === 3) {\n      // The video element hasn't started loading the source yet\n      // or didn't find a source\n      return;\n    }\n\n    if (el.readyState === 0) {\n      // NetworkState is set synchronously BUT loadstart is fired at the\n      // end of the current stack, usually before setInterval(fn, 0).\n      // So at this point we know loadstart may have already fired or is\n      // about to fire, and either way the player hasn't seen it yet.\n      // We don't want to fire loadstart prematurely here and cause a\n      // double loadstart so we'll wait and see if it happens between now\n      // and the next loop, and fire it if not.\n      // HOWEVER, we also want to make sure it fires before loadedmetadata\n      // which could also happen between now and the next loop, so we'll\n      // watch for that also.\n      var loadstartFired = false;\n\n      var setLoadstartFired = function setLoadstartFired() {\n        loadstartFired = true;\n      };\n\n      this.on('loadstart', setLoadstartFired);\n\n      var triggerLoadstart = function triggerLoadstart() {\n        // We did miss the original loadstart. Make sure the player\n        // sees loadstart before loadedmetadata\n        if (!loadstartFired) {\n          this.trigger('loadstart');\n        }\n      };\n\n      this.on('loadedmetadata', triggerLoadstart);\n      this.ready(function () {\n        this.off('loadstart', setLoadstartFired);\n        this.off('loadedmetadata', triggerLoadstart);\n\n        if (!loadstartFired) {\n          // We did miss the original native loadstart. Fire it now.\n          this.trigger('loadstart');\n        }\n      });\n      return;\n    } // From here on we know that loadstart already fired and we missed it.\n    // The other readyState events aren't as much of a problem if we double\n    // them, so not going to go to as much trouble as loadstart to prevent\n    // that unless we find reason to.\n\n\n    var eventsToTrigger = ['loadstart']; // loadedmetadata: newly equal to HAVE_METADATA (1) or greater\n\n    eventsToTrigger.push('loadedmetadata'); // loadeddata: newly increased to HAVE_CURRENT_DATA (2) or greater\n\n    if (el.readyState >= 2) {\n      eventsToTrigger.push('loadeddata');\n    } // canplay: newly increased to HAVE_FUTURE_DATA (3) or greater\n\n\n    if (el.readyState >= 3) {\n      eventsToTrigger.push('canplay');\n    } // canplaythrough: newly equal to HAVE_ENOUGH_DATA (4)\n\n\n    if (el.readyState >= 4) {\n      eventsToTrigger.push('canplaythrough');\n    } // We still need to give the player time to add event listeners\n\n\n    this.ready(function () {\n      eventsToTrigger.forEach(function (type) {\n        this.trigger(type);\n      }, this);\n    });\n  }\n  /**\n   * Set whether we are scrubbing or not.\n   * This is used to decide whether we should use `fastSeek` or not.\n   * `fastSeek` is used to provide trick play on Safari browsers.\n   *\n   * @param {boolean} isScrubbing\n   *                  - true for we are currently scrubbing\n   *                  - false for we are no longer scrubbing\n   */\n  ;\n\n  _proto.setScrubbing = function setScrubbing(isScrubbing) {\n    this.isScrubbing_ = isScrubbing;\n  }\n  /**\n   * Get whether we are scrubbing or not.\n   *\n   * @return {boolean} isScrubbing\n   *                  - true for we are currently scrubbing\n   *                  - false for we are no longer scrubbing\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing() {\n    return this.isScrubbing_;\n  }\n  /**\n   * Set current time for the `HTML5` tech.\n   *\n   * @param {number} seconds\n   *        Set the current time of the media to this.\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(seconds) {\n    try {\n      if (this.isScrubbing_ && this.el_.fastSeek && IS_ANY_SAFARI) {\n        this.el_.fastSeek(seconds);\n      } else {\n        this.el_.currentTime = seconds;\n      }\n    } catch (e) {\n      log$1(e, 'Video is not ready. (Video.js)'); // this.warning(VideoJS.warnings.videoNotReady);\n    }\n  }\n  /**\n   * Get the current duration of the HTML5 media element.\n   *\n   * @return {number}\n   *         The duration of the media or 0 if there is no duration.\n   */\n  ;\n\n  _proto.duration = function duration() {\n    var _this5 = this;\n\n    // Android Chrome will report duration as Infinity for VOD HLS until after\n    // playback has started, which triggers the live display erroneously.\n    // Return NaN if playback has not started and trigger a durationupdate once\n    // the duration can be reliably known.\n    if (this.el_.duration === Infinity && IS_ANDROID && IS_CHROME && this.el_.currentTime === 0) {\n      // Wait for the first `timeupdate` with currentTime > 0 - there may be\n      // several with 0\n      var checkProgress = function checkProgress() {\n        if (_this5.el_.currentTime > 0) {\n          // Trigger durationchange for genuinely live video\n          if (_this5.el_.duration === Infinity) {\n            _this5.trigger('durationchange');\n          }\n\n          _this5.off('timeupdate', checkProgress);\n        }\n      };\n\n      this.on('timeupdate', checkProgress);\n      return NaN;\n    }\n\n    return this.el_.duration || NaN;\n  }\n  /**\n   * Get the current width of the HTML5 media element.\n   *\n   * @return {number}\n   *         The width of the HTML5 media element.\n   */\n  ;\n\n  _proto.width = function width() {\n    return this.el_.offsetWidth;\n  }\n  /**\n   * Get the current height of the HTML5 media element.\n   *\n   * @return {number}\n   *         The height of the HTML5 media element.\n   */\n  ;\n\n  _proto.height = function height() {\n    return this.el_.offsetHeight;\n  }\n  /**\n   * Proxy iOS `webkitbeginfullscreen` and `webkitendfullscreen` into\n   * `fullscreenchange` event.\n   *\n   * @private\n   * @fires fullscreenchange\n   * @listens webkitendfullscreen\n   * @listens webkitbeginfullscreen\n   * @listens webkitbeginfullscreen\n   */\n  ;\n\n  _proto.proxyWebkitFullscreen_ = function proxyWebkitFullscreen_() {\n    var _this6 = this;\n\n    if (!('webkitDisplayingFullscreen' in this.el_)) {\n      return;\n    }\n\n    var endFn = function endFn() {\n      this.trigger('fullscreenchange', {\n        isFullscreen: false\n      }); // Safari will sometimes set contols on the videoelement when existing fullscreen.\n\n      if (this.el_.controls && !this.options_.nativeControlsForTouch && this.controls()) {\n        this.el_.controls = false;\n      }\n    };\n\n    var beginFn = function beginFn() {\n      if ('webkitPresentationMode' in this.el_ && this.el_.webkitPresentationMode !== 'picture-in-picture') {\n        this.one('webkitendfullscreen', endFn);\n        this.trigger('fullscreenchange', {\n          isFullscreen: true,\n          // set a flag in case another tech triggers fullscreenchange\n          nativeIOSFullscreen: true\n        });\n      }\n    };\n\n    this.on('webkitbeginfullscreen', beginFn);\n    this.on('dispose', function () {\n      _this6.off('webkitbeginfullscreen', beginFn);\n\n      _this6.off('webkitendfullscreen', endFn);\n    });\n  }\n  /**\n   * Check if fullscreen is supported on the current playback device.\n   *\n   * @return {boolean}\n   *         - True if fullscreen is supported.\n   *         - False if fullscreen is not supported.\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    if (typeof this.el_.webkitEnterFullScreen === 'function') {\n      var userAgent = window$1.navigator && window$1.navigator.userAgent || ''; // Seems to be broken in Chromium/Chrome && Safari in Leopard\n\n      if (/Android/.test(userAgent) || !/Chrome|Mac OS X 10.5/.test(userAgent)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n  /**\n   * Request that the `HTML5` Tech enter fullscreen.\n   */\n  ;\n\n  _proto.enterFullScreen = function enterFullScreen() {\n    var video = this.el_;\n\n    if (video.paused && video.networkState <= video.HAVE_METADATA) {\n      // attempt to prime the video element for programmatic access\n      // this isn't necessary on the desktop but shouldn't hurt\n      silencePromise(this.el_.play()); // playing and pausing synchronously during the transition to fullscreen\n      // can get iOS ~6.1 devices into a play/pause loop\n\n      this.setTimeout(function () {\n        video.pause();\n\n        try {\n          video.webkitEnterFullScreen();\n        } catch (e) {\n          this.trigger('fullscreenerror', e);\n        }\n      }, 0);\n    } else {\n      try {\n        video.webkitEnterFullScreen();\n      } catch (e) {\n        this.trigger('fullscreenerror', e);\n      }\n    }\n  }\n  /**\n   * Request that the `HTML5` Tech exit fullscreen.\n   */\n  ;\n\n  _proto.exitFullScreen = function exitFullScreen() {\n    if (!this.el_.webkitDisplayingFullscreen) {\n      this.trigger('fullscreenerror', new Error('The video is not fullscreen'));\n      return;\n    }\n\n    this.el_.webkitExitFullScreen();\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    return this.el_.requestPictureInPicture();\n  }\n  /**\n   * Native requestVideoFrameCallback if supported by browser/tech, or fallback\n   * Don't use rVCF on Safari when DRM is playing, as it doesn't fire\n   * Needs to be checked later than the constructor\n   * This will be a false positive for clear sources loaded after a Fairplay source\n   *\n   * @param {function} cb function to call\n   * @return {number} id of request\n   */\n  ;\n\n  _proto.requestVideoFrameCallback = function requestVideoFrameCallback(cb) {\n    if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {\n      return this.el_.requestVideoFrameCallback(cb);\n    }\n\n    return _Tech.prototype.requestVideoFrameCallback.call(this, cb);\n  }\n  /**\n   * Native or fallback requestVideoFrameCallback\n   *\n   * @param {number} id request id to cancel\n   */\n  ;\n\n  _proto.cancelVideoFrameCallback = function cancelVideoFrameCallback(id) {\n    if (this.featuresVideoFrameCallback && !this.el_.webkitKeys) {\n      this.el_.cancelVideoFrameCallback(id);\n    } else {\n      _Tech.prototype.cancelVideoFrameCallback.call(this, id);\n    }\n  }\n  /**\n   * A getter/setter for the `Html5` Tech's source object.\n   * > Note: Please use {@link Html5#setSource}\n   *\n   * @param {Tech~SourceObject} [src]\n   *        The source object you want to set on the `HTML5` techs element.\n   *\n   * @return {Tech~SourceObject|undefined}\n   *         - The current source object when a source is not passed in.\n   *         - undefined when setting\n   *\n   * @deprecated Since version 5.\n   */\n  ;\n\n  _proto.src = function src(_src) {\n    if (_src === undefined) {\n      return this.el_.src;\n    } // Setting src through `src` instead of `setSrc` will be deprecated\n\n\n    this.setSrc(_src);\n  }\n  /**\n   * Reset the tech by removing all sources and then calling\n   * {@link Html5.resetMediaElement}.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    Html5.resetMediaElement(this.el_);\n  }\n  /**\n   * Get the current source on the `HTML5` Tech. Falls back to returning the source from\n   * the HTML5 media element.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object from the HTML5 tech. With a fallback to the\n   *         elements source.\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    if (this.currentSource_) {\n      return this.currentSource_.src;\n    }\n\n    return this.el_.currentSrc;\n  }\n  /**\n   * Set controls attribute for the HTML5 media Element.\n   *\n   * @param {string} val\n   *        Value to set the controls attribute to\n   */\n  ;\n\n  _proto.setControls = function setControls(val) {\n    this.el_.controls = !!val;\n  }\n  /**\n   * Create and returns a remote {@link TextTrack} object.\n   *\n   * @param {string} kind\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata)\n   *\n   * @param {string} [label]\n   *        Label to identify the text track\n   *\n   * @param {string} [language]\n   *        Two letter language abbreviation\n   *\n   * @return {TextTrack}\n   *         The TextTrack that gets created.\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.addTextTrack.call(this, kind, label, language);\n    }\n\n    return this.el_.addTextTrack(kind, label, language);\n  }\n  /**\n   * Creates either native TextTrack or an emulated TextTrack depending\n   * on the value of `featuresNativeTextTracks`\n   *\n   * @param {Object} options\n   *        The object should contain the options to initialize the TextTrack with.\n   *\n   * @param {string} [options.kind]\n   *        `TextTrack` kind (subtitles, captions, descriptions, chapters, or metadata).\n   *\n   * @param {string} [options.label]\n   *        Label to identify the text track\n   *\n   * @param {string} [options.language]\n   *        Two letter language abbreviation.\n   *\n   * @param {boolean} [options.default]\n   *        Default this track to on.\n   *\n   * @param {string} [options.id]\n   *        The internal id to assign this track.\n   *\n   * @param {string} [options.src]\n   *        A source url for the track.\n   *\n   * @return {HTMLTrackElement}\n   *         The track element that gets created.\n   */\n  ;\n\n  _proto.createRemoteTextTrack = function createRemoteTextTrack(options) {\n    if (!this.featuresNativeTextTracks) {\n      return _Tech.prototype.createRemoteTextTrack.call(this, options);\n    }\n\n    var htmlTrackElement = document.createElement('track');\n\n    if (options.kind) {\n      htmlTrackElement.kind = options.kind;\n    }\n\n    if (options.label) {\n      htmlTrackElement.label = options.label;\n    }\n\n    if (options.language || options.srclang) {\n      htmlTrackElement.srclang = options.language || options.srclang;\n    }\n\n    if (options[\"default\"]) {\n      htmlTrackElement[\"default\"] = options[\"default\"];\n    }\n\n    if (options.id) {\n      htmlTrackElement.id = options.id;\n    }\n\n    if (options.src) {\n      htmlTrackElement.src = options.src;\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Creates a remote text track object and returns an html track element.\n   *\n   * @param {Object} options The object should contain values for\n   * kind, language, label, and src (location of the WebVTT file)\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   * automatically removed from the video element whenever the source changes\n   * @return {HTMLTrackElement} An Html Track Element.\n   * This can be an emulated {@link HTMLTrackElement} or a native one.\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   * to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    var htmlTrackElement = _Tech.prototype.addRemoteTextTrack.call(this, options, manualCleanup);\n\n    if (this.featuresNativeTextTracks) {\n      this.el().appendChild(htmlTrackElement);\n    }\n\n    return htmlTrackElement;\n  }\n  /**\n   * Remove remote `TextTrack` from `TextTrackList` object\n   *\n   * @param {TextTrack} track\n   *        `TextTrack` object to remove\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(track) {\n    _Tech.prototype.removeRemoteTextTrack.call(this, track);\n\n    if (this.featuresNativeTextTracks) {\n      var tracks = this.$$('track');\n      var i = tracks.length;\n\n      while (i--) {\n        if (track === tracks[i] || track === tracks[i].track) {\n          this.el().removeChild(tracks[i]);\n        }\n      }\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object}\n   *         An object with supported media playback quality metrics\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    if (typeof this.el().getVideoPlaybackQuality === 'function') {\n      return this.el().getVideoPlaybackQuality();\n    }\n\n    var videoPlaybackQuality = {};\n\n    if (typeof this.el().webkitDroppedFrameCount !== 'undefined' && typeof this.el().webkitDecodedFrameCount !== 'undefined') {\n      videoPlaybackQuality.droppedVideoFrames = this.el().webkitDroppedFrameCount;\n      videoPlaybackQuality.totalVideoFrames = this.el().webkitDecodedFrameCount;\n    }\n\n    if (window$1.performance && typeof window$1.performance.now === 'function') {\n      videoPlaybackQuality.creationTime = window$1.performance.now();\n    } else if (window$1.performance && window$1.performance.timing && typeof window$1.performance.timing.navigationStart === 'number') {\n      videoPlaybackQuality.creationTime = window$1.Date.now() - window$1.performance.timing.navigationStart;\n    }\n\n    return videoPlaybackQuality;\n  };\n\n  return Html5;\n}(Tech);\n/* HTML5 Support Testing ---------------------------------------------------- */\n\n/**\n * Element for testing browser HTML5 media capabilities\n *\n * @type {Element}\n * @constant\n * @private\n */\n\n\ndefineLazyProperty(Html5, 'TEST_VID', function () {\n  if (!isReal()) {\n    return;\n  }\n\n  var video = document.createElement('video');\n  var track = document.createElement('track');\n  track.kind = 'captions';\n  track.srclang = 'en';\n  track.label = 'English';\n  video.appendChild(track);\n  return video;\n});\n/**\n * Check if HTML5 media is supported by this browser/device.\n *\n * @return {boolean}\n *         - True if HTML5 media is supported.\n *         - False if HTML5 media is not supported.\n */\n\nHtml5.isSupported = function () {\n  // IE with no Media Player is a LIAR! (#984)\n  try {\n    Html5.TEST_VID.volume = 0.5;\n  } catch (e) {\n    return false;\n  }\n\n  return !!(Html5.TEST_VID && Html5.TEST_VID.canPlayType);\n};\n/**\n * Check if the tech can support the given type\n *\n * @param {string} type\n *        The mimetype to check\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlayType = function (type) {\n  return Html5.TEST_VID.canPlayType(type);\n};\n/**\n * Check if the tech can support the given source\n *\n * @param {Object} srcObj\n *        The source object\n * @param {Object} options\n *        The options passed to the tech\n * @return {string} 'probably', 'maybe', or '' (empty string)\n */\n\n\nHtml5.canPlaySource = function (srcObj, options) {\n  return Html5.canPlayType(srcObj.type);\n};\n/**\n * Check if the volume can be changed in this browser/device.\n * Volume cannot be changed in a lot of mobile devices.\n * Specifically, it can't be changed from 1 on iOS.\n *\n * @return {boolean}\n *         - True if volume can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlVolume = function () {\n  // IE will error if Windows Media Player not installed #3315\n  try {\n    var volume = Html5.TEST_VID.volume;\n    Html5.TEST_VID.volume = volume / 2 + 0.1;\n    var canControl = volume !== Html5.TEST_VID.volume; // With the introduction of iOS 15, there are cases where the volume is read as\n    // changed but reverts back to its original state at the start of the next tick.\n    // To determine whether volume can be controlled on iOS,\n    // a timeout is set and the volume is checked asynchronously.\n    // Since `features` doesn't currently work asynchronously, the value is manually set.\n\n    if (canControl && IS_IOS) {\n      window$1.setTimeout(function () {\n        if (Html5 && Html5.prototype) {\n          Html5.prototype.featuresVolumeControl = volume !== Html5.TEST_VID.volume;\n        }\n      }); // default iOS to false, which will be updated in the timeout above.\n\n      return false;\n    }\n\n    return canControl;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the volume can be muted in this browser/device.\n * Some devices, e.g. iOS, don't allow changing volume\n * but permits muting/unmuting.\n *\n * @return {bolean}\n *      - True if volume can be muted\n *      - False otherwise\n */\n\n\nHtml5.canMuteVolume = function () {\n  try {\n    var muted = Html5.TEST_VID.muted; // in some versions of iOS muted property doesn't always\n    // work, so we want to set both property and attribute\n\n    Html5.TEST_VID.muted = !muted;\n\n    if (Html5.TEST_VID.muted) {\n      setAttribute(Html5.TEST_VID, 'muted', 'muted');\n    } else {\n      removeAttribute(Html5.TEST_VID, 'muted', 'muted');\n    }\n\n    return muted !== Html5.TEST_VID.muted;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if the playback rate can be changed in this browser/device.\n *\n * @return {boolean}\n *         - True if playback rate can be controlled\n *         - False otherwise\n */\n\n\nHtml5.canControlPlaybackRate = function () {\n  // Playback rate API is implemented in Android Chrome, but doesn't do anything\n  // https://github.com/videojs/video.js/issues/3180\n  if (IS_ANDROID && IS_CHROME && CHROME_VERSION < 58) {\n    return false;\n  } // IE will error if Windows Media Player not installed #3315\n\n\n  try {\n    var playbackRate = Html5.TEST_VID.playbackRate;\n    Html5.TEST_VID.playbackRate = playbackRate / 2 + 0.1;\n    return playbackRate !== Html5.TEST_VID.playbackRate;\n  } catch (e) {\n    return false;\n  }\n};\n/**\n * Check if we can override a video/audio elements attributes, with\n * Object.defineProperty.\n *\n * @return {boolean}\n *         - True if builtin attributes can be overridden\n *         - False otherwise\n */\n\n\nHtml5.canOverrideAttributes = function () {\n  // if we cannot overwrite the src/innerHTML property, there is no support\n  // iOS 7 safari for instance cannot do this.\n  try {\n    var noop = function noop() {};\n\n    Object.defineProperty(document.createElement('video'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'src', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('video'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n    Object.defineProperty(document.createElement('audio'), 'innerHTML', {\n      get: noop,\n      set: noop\n    });\n  } catch (e) {\n    return false;\n  }\n\n  return true;\n};\n/**\n * Check to see if native `TextTrack`s are supported by this browser/device.\n *\n * @return {boolean}\n *         - True if native `TextTrack`s are supported.\n *         - False otherwise\n */\n\n\nHtml5.supportsNativeTextTracks = function () {\n  return IS_ANY_SAFARI || IS_IOS && IS_CHROME;\n};\n/**\n * Check to see if native `VideoTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `VideoTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeVideoTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.videoTracks);\n};\n/**\n * Check to see if native `AudioTrack`s are supported by this browser/device\n *\n * @return {boolean}\n *        - True if native `AudioTrack`s are supported.\n *        - False otherwise\n */\n\n\nHtml5.supportsNativeAudioTracks = function () {\n  return !!(Html5.TEST_VID && Html5.TEST_VID.audioTracks);\n};\n/**\n * An array of events available on the Html5 tech.\n *\n * @private\n * @type {Array}\n */\n\n\nHtml5.Events = ['loadstart', 'suspend', 'abort', 'error', 'emptied', 'stalled', 'loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'playing', 'waiting', 'seeking', 'seeked', 'ended', 'durationchange', 'timeupdate', 'progress', 'play', 'pause', 'ratechange', 'resize', 'volumechange'];\n/**\n * Boolean indicating whether the `Tech` supports volume control.\n *\n * @type {boolean}\n * @default {@link Html5.canControlVolume}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports muting volume.\n *\n * @type {bolean}\n * @default {@link Html5.canMuteVolume}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports changing the speed at which the media\n * plays. Examples:\n *   - Set player to play 2x (twice) as fast\n *   - Set player to play 0.5x (half) as fast\n *\n * @type {boolean}\n * @default {@link Html5.canControlPlaybackRate}\n */\n\n/**\n * Boolean indicating whether the `Tech` supports the `sourceset` event.\n *\n * @type {boolean}\n * @default\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `TextTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeTextTracks}\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `VideoTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeVideoTracks}\n */\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports native `AudioTrack`s.\n *\n * @type {boolean}\n * @default {@link Html5.supportsNativeAudioTracks}\n */\n\n[['featuresMuteControl', 'canMuteVolume'], ['featuresPlaybackRate', 'canControlPlaybackRate'], ['featuresSourceset', 'canOverrideAttributes'], ['featuresNativeTextTracks', 'supportsNativeTextTracks'], ['featuresNativeVideoTracks', 'supportsNativeVideoTracks'], ['featuresNativeAudioTracks', 'supportsNativeAudioTracks']].forEach(function (_ref) {\n  var key = _ref[0],\n      fn = _ref[1];\n  defineLazyProperty(Html5.prototype, key, function () {\n    return Html5[fn]();\n  }, true);\n});\nHtml5.prototype.featuresVolumeControl = Html5.canControlVolume();\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the media element\n * moving in the DOM. iOS breaks if you move the media element, so this is set this to\n * false there. Everywhere else this should be true.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.movingMediaElementInDOM = !IS_IOS; // TODO: Previous comment: No longer appears to be used. Can probably be removed.\n//       Is this true?\n\n/**\n * Boolean indicating whether the `HTML5` tech currently supports automatic media resize\n * when going into fullscreen.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresFullscreenResize = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the progress event.\n * If this is false, manual `progress` events will be triggered instead.\n *\n * @type {boolean}\n * @default\n */\n\nHtml5.prototype.featuresProgressEvents = true;\n/**\n * Boolean indicating whether the `HTML5` tech currently supports the timeupdate event.\n * If this is false, manual `timeupdate` events will be triggered instead.\n *\n * @default\n */\n\nHtml5.prototype.featuresTimeupdateEvents = true;\n/**\n * Whether the HTML5 el supports `requestVideoFrameCallback`\n *\n * @type {boolean}\n */\n\nHtml5.prototype.featuresVideoFrameCallback = !!(Html5.TEST_VID && Html5.TEST_VID.requestVideoFrameCallback); // HTML5 Feature detection and Device Fixes --------------------------------- //\n\nvar canPlayType;\n\nHtml5.patchCanPlayType = function () {\n  // Android 4.0 and above can play HLS to some extent but it reports being unable to do so\n  // Firefox and Chrome report correctly\n  if (ANDROID_VERSION >= 4.0 && !IS_FIREFOX && !IS_CHROME) {\n    canPlayType = Html5.TEST_VID && Html5.TEST_VID.constructor.prototype.canPlayType;\n\n    Html5.TEST_VID.constructor.prototype.canPlayType = function (type) {\n      var mpegurlRE = /^application\\/(?:x-|vnd\\.apple\\.)mpegurl/i;\n\n      if (type && mpegurlRE.test(type)) {\n        return 'maybe';\n      }\n\n      return canPlayType.call(this, type);\n    };\n  }\n};\n\nHtml5.unpatchCanPlayType = function () {\n  var r = Html5.TEST_VID.constructor.prototype.canPlayType;\n\n  if (canPlayType) {\n    Html5.TEST_VID.constructor.prototype.canPlayType = canPlayType;\n  }\n\n  return r;\n}; // by default, patch the media element\n\n\nHtml5.patchCanPlayType();\n\nHtml5.disposeMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  if (el.parentNode) {\n    el.parentNode.removeChild(el);\n  } // remove any child track or source nodes to prevent their loading\n\n\n  while (el.hasChildNodes()) {\n    el.removeChild(el.firstChild);\n  } // remove any src reference. not setting `src=''` because that causes a warning\n  // in firefox\n\n\n  el.removeAttribute('src'); // force the media element to update its loading state by calling load()\n  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// not supported\n      }\n    })();\n  }\n};\n\nHtml5.resetMediaElement = function (el) {\n  if (!el) {\n    return;\n  }\n\n  var sources = el.querySelectorAll('source');\n  var i = sources.length;\n\n  while (i--) {\n    el.removeChild(sources[i]);\n  } // remove any src reference.\n  // not setting `src=''` because that throws an error\n\n\n  el.removeAttribute('src');\n\n  if (typeof el.load === 'function') {\n    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)\n    (function () {\n      try {\n        el.load();\n      } catch (e) {// satisfy linter\n      }\n    })();\n  }\n};\n/* Native HTML5 element property wrapping ----------------------------------- */\n// Wrap native boolean attributes with getters that check both property and attribute\n// The list is as followed:\n// muted, defaultMuted, autoplay, controls, loop, playsinline\n\n\n[\n/**\n * Get the value of `muted` from the media element. `muted` indicates\n * that the volume for the media should be set to silent. This does not actually change\n * the `volume` attribute.\n *\n * @method Html5#muted\n * @return {boolean}\n *         - True if the value of `volume` should be ignored and the audio set to silent.\n *         - False if the value of `volume` should be used.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Get the value of `defaultMuted` from the media element. `defaultMuted` indicates\n * whether the media should start muted or not. Only changes the default state of the\n * media. `muted` and `defaultMuted` can have different values. {@link Html5#muted} indicates the\n * current state.\n *\n * @method Html5#defaultMuted\n * @return {boolean}\n *         - The value of `defaultMuted` from the media element.\n *         - True indicates that the media should start muted.\n *         - False indicates that the media should not start muted\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Get the value of `autoplay` from the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#autoplay\n * @return {boolean}\n *         - The value of `autoplay` from the media element.\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Get the value of `controls` from the media element. `controls` indicates\n * whether the native media controls should be shown or hidden.\n *\n * @method Html5#controls\n * @return {boolean}\n *         - The value of `controls` from the media element.\n *         - True indicates that native controls should be showing.\n *         - False indicates that native controls should be hidden.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-controls}\n */\n'controls',\n/**\n * Get the value of `loop` from the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#loop\n * @return {boolean}\n *         - The value of `loop` from the media element.\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Get the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#playsinline\n * @return {boolean}\n *         - The value of `playsinline` from the media element.\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop] || this.el_.hasAttribute(prop);\n  };\n}); // Wrap native boolean attributes with setters that set both property and attribute\n// The list is as followed:\n// setMuted, setDefaultMuted, setAutoplay, setLoop, setPlaysinline\n// setControls is special-cased above\n\n[\n/**\n * Set the value of `muted` on the media element. `muted` indicates that the current\n * audio level should be silent.\n *\n * @method Html5#setMuted\n * @param {boolean} muted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-muted}\n */\n'muted',\n/**\n * Set the value of `defaultMuted` on the media element. `defaultMuted` indicates that the current\n * audio level should be silent, but will only effect the muted level on initial playback..\n *\n * @method Html5.prototype.setDefaultMuted\n * @param {boolean} defaultMuted\n *        - True if the audio should be set to silent\n *        - False otherwise\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultmuted}\n */\n'defaultMuted',\n/**\n * Set the value of `autoplay` on the media element. `autoplay` indicates\n * that the media should start to play as soon as the page is ready.\n *\n * @method Html5#setAutoplay\n * @param {boolean} autoplay\n *         - True indicates that the media should start as soon as the page loads.\n *         - False indicates that the media should not start as soon as the page loads.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-autoplay}\n */\n'autoplay',\n/**\n * Set the value of `loop` on the media element. `loop` indicates\n * that the media should return to the start of the media and continue playing once\n * it reaches the end.\n *\n * @method Html5#setLoop\n * @param {boolean} loop\n *         - True indicates that playback should seek back to start once\n *           the end of a media is reached.\n *         - False indicates that playback should not loop back to the start when the\n *           end of the media is reached.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-loop}\n */\n'loop',\n/**\n * Set the value of `playsinline` from the media element. `playsinline` indicates\n * to the browser that non-fullscreen playback is preferred when fullscreen\n * playback is the native default, such as in iOS Safari.\n *\n * @method Html5#setPlaysinline\n * @param {boolean} playsinline\n *         - True indicates that the media should play inline.\n *         - False indicates that the media should not play inline.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n */\n'playsinline'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n    this.el_[prop] = v;\n\n    if (v) {\n      this.el_.setAttribute(prop, prop);\n    } else {\n      this.el_.removeAttribute(prop);\n    }\n  };\n}); // Wrap native properties with a getter\n// The list is as followed\n// paused, currentTime, buffered, volume, poster, preload, error, seeking\n// seekable, ended, playbackRate, defaultPlaybackRate, disablePictureInPicture\n// played, networkState, readyState, videoWidth, videoHeight, crossOrigin\n\n[\n/**\n * Get the value of `paused` from the media element. `paused` indicates whether the media element\n * is currently paused or not.\n *\n * @method Html5#paused\n * @return {boolean}\n *         The value of `paused` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-paused}\n */\n'paused',\n/**\n * Get the value of `currentTime` from the media element. `currentTime` indicates\n * the current second that the media is at in playback.\n *\n * @method Html5#currentTime\n * @return {number}\n *         The value of `currentTime` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-currenttime}\n */\n'currentTime',\n/**\n * Get the value of `buffered` from the media element. `buffered` is a `TimeRange`\n * object that represents the parts of the media that are already downloaded and\n * available for playback.\n *\n * @method Html5#buffered\n * @return {TimeRange}\n *         The value of `buffered` from the media element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-buffered}\n */\n'buffered',\n/**\n * Get the value of `volume` from the media element. `volume` indicates\n * the current playback volume of audio for a media. `volume` will be a value from 0\n * (silent) to 1 (loudest and default).\n *\n * @method Html5#volume\n * @return {number}\n *         The value of `volume` from the media element. Value will be between 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Get the value of `poster` from the media element. `poster` indicates\n * that the url of an image file that can/will be shown when no media data is available.\n *\n * @method Html5#poster\n * @return {string}\n *         The value of `poster` from the media element. Value will be a url to an\n *         image.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-video-poster}\n */\n'poster',\n/**\n * Get the value of `preload` from the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#preload\n * @return {string}\n *         The value of `preload` from the media element. Will be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Get the value of the `error` from the media element. `error` indicates any\n * MediaError that may have occurred during playback. If error returns null there is no\n * current error.\n *\n * @method Html5#error\n * @return {MediaError|null}\n *         The value of `error` from the media element. Will be `MediaError` if there\n *         is a current error and null otherwise.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-error}\n */\n'error',\n/**\n * Get the value of `seeking` from the media element. `seeking` indicates whether the\n * media is currently seeking to a new position or not.\n *\n * @method Html5#seeking\n * @return {boolean}\n *         - The value of `seeking` from the media element.\n *         - True indicates that the media is currently seeking to a new position.\n *         - False indicates that the media is not seeking to a new position at this time.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seeking}\n */\n'seeking',\n/**\n * Get the value of `seekable` from the media element. `seekable` returns a\n * `TimeRange` object indicating ranges of time that can currently be `seeked` to.\n *\n * @method Html5#seekable\n * @return {TimeRange}\n *         The value of `seekable` from the media element. A `TimeRange` object\n *         indicating the current ranges of time that can be seeked to.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-seekable}\n */\n'seekable',\n/**\n * Get the value of `ended` from the media element. `ended` indicates whether\n * the media has reached the end or not.\n *\n * @method Html5#ended\n * @return {boolean}\n *         - The value of `ended` from the media element.\n *         - True indicates that the media has ended.\n *         - False indicates that the media has not ended.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-ended}\n */\n'ended',\n/**\n * Get the value of `playbackRate` from the media element. `playbackRate` indicates\n * the rate at which the media is currently playing back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#playbackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Get the value of `defaultPlaybackRate` from the media element. `defaultPlaybackRate` indicates\n * the rate at which the media is currently playing back. This value will not indicate the current\n * `playbackRate` after playback has started, use {@link Html5#playbackRate} for that.\n *\n * Examples:\n *   - if defaultPlaybackRate is set to 2, media will play twice as fast.\n *   - if defaultPlaybackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.defaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'defaultPlaybackRate',\n/**\n * Get the value of 'disablePictureInPicture' from the video element.\n *\n * @method Html5#disablePictureInPicture\n * @return {boolean} value\n *         - The value of `disablePictureInPicture` from the video element.\n *         - True indicates that the video can't be played in Picture-In-Picture mode\n *         - False indicates that the video can be played in Picture-In-Picture mode\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n'disablePictureInPicture',\n/**\n * Get the value of `played` from the media element. `played` returns a `TimeRange`\n * object representing points in the media timeline that have been played.\n *\n * @method Html5#played\n * @return {TimeRange}\n *         The value of `played` from the media element. A `TimeRange` object indicating\n *         the ranges of time that have been played.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-played}\n */\n'played',\n/**\n * Get the value of `networkState` from the media element. `networkState` indicates\n * the current network state. It returns an enumeration from the following list:\n * - 0: NETWORK_EMPTY\n * - 1: NETWORK_IDLE\n * - 2: NETWORK_LOADING\n * - 3: NETWORK_NO_SOURCE\n *\n * @method Html5#networkState\n * @return {number}\n *         The value of `networkState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-networkstate}\n */\n'networkState',\n/**\n * Get the value of `readyState` from the media element. `readyState` indicates\n * the current state of the media element. It returns an enumeration from the\n * following list:\n * - 0: HAVE_NOTHING\n * - 1: HAVE_METADATA\n * - 2: HAVE_CURRENT_DATA\n * - 3: HAVE_FUTURE_DATA\n * - 4: HAVE_ENOUGH_DATA\n *\n * @method Html5#readyState\n * @return {number}\n *         The value of `readyState` from the media element. This will be a number\n *         from the list in the description.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#ready-states}\n */\n'readyState',\n/**\n * Get the value of `videoWidth` from the video element. `videoWidth` indicates\n * the current width of the video in css pixels.\n *\n * @method Html5#videoWidth\n * @return {number}\n *         The value of `videoWidth` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoWidth',\n/**\n * Get the value of `videoHeight` from the video element. `videoHeight` indicates\n * the current height of the video in css pixels.\n *\n * @method Html5#videoHeight\n * @return {number}\n *         The value of `videoHeight` from the video element. This will be a number\n *         in css pixels.\n *\n * @see [Spec] {@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-video-videowidth}\n */\n'videoHeight',\n/**\n * Get the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#crossOrigin\n * @return {string}\n *         - anonymous indicates that the media should not sent cookies.\n *         - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n'crossOrigin'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop];\n  };\n}); // Wrap native properties with a setter in this format:\n// set + toTitleCase(name)\n// The list is as follows:\n// setVolume, setSrc, setPoster, setPreload, setPlaybackRate, setDefaultPlaybackRate,\n// setDisablePictureInPicture, setCrossOrigin\n\n[\n/**\n * Set the value of `volume` on the media element. `volume` indicates the current\n * audio level as a percentage in decimal form. This means that 1 is 100%, 0.5 is 50%, and\n * so on.\n *\n * @method Html5#setVolume\n * @param {number} percentAsDecimal\n *        The volume percent as a decimal. Valid range is from 0-1.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-a-volume}\n */\n'volume',\n/**\n * Set the value of `src` on the media element. `src` indicates the current\n * {@link Tech~SourceObject} for the media.\n *\n * @method Html5#setSrc\n * @param {Tech~SourceObject} src\n *        The source object to set as the current source.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-src}\n */\n'src',\n/**\n * Set the value of `poster` on the media element. `poster` is the url to\n * an image file that can/will be shown when no media data is available.\n *\n * @method Html5#setPoster\n * @param {string} poster\n *        The url to an image that should be used as the `poster` for the media\n *        element.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-poster}\n */\n'poster',\n/**\n * Set the value of `preload` on the media element. `preload` indicates\n * what should download before the media is interacted with. It can have the following\n * values:\n * - none: nothing should be downloaded\n * - metadata: poster and the first few frames of the media may be downloaded to get\n *   media dimensions and other metadata\n * - auto: allow the media and metadata for the media to be downloaded before\n *    interaction\n *\n * @method Html5#setPreload\n * @param {string} preload\n *         The value of `preload` to set on the media element. Must be 'none', 'metadata',\n *         or 'auto'.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#attr-media-preload}\n */\n'preload',\n/**\n * Set the value of `playbackRate` on the media element. `playbackRate` indicates\n * the rate at which the media should play back. Examples:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5#setPlaybackRate\n * @return {number}\n *         The value of `playbackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-playbackrate}\n */\n'playbackRate',\n/**\n * Set the value of `defaultPlaybackRate` on the media element. `defaultPlaybackRate` indicates\n * the rate at which the media should play back upon initial startup. Changing this value\n * after a video has started will do nothing. Instead you should used {@link Html5#setPlaybackRate}.\n *\n * Example Values:\n *   - if playbackRate is set to 2, media will play twice as fast.\n *   - if playbackRate is set to 0.5, media will play half as fast.\n *\n * @method Html5.prototype.setDefaultPlaybackRate\n * @return {number}\n *         The value of `defaultPlaybackRate` from the media element. A number indicating\n *         the current playback speed of the media, where 1 is normal speed.\n *\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-defaultplaybackrate}\n */\n'defaultPlaybackRate',\n/**\n * Prevents the browser from suggesting a Picture-in-Picture context menu\n * or to request Picture-in-Picture automatically in some cases.\n *\n * @method Html5#setDisablePictureInPicture\n * @param {boolean} value\n *         The true value will disable Picture-in-Picture mode.\n *\n * @see [Spec]{@link https://w3c.github.io/picture-in-picture/#disable-pip}\n */\n'disablePictureInPicture',\n/**\n * Set the value of `crossOrigin` from the media element. `crossOrigin` indicates\n * to the browser that should sent the cookies along with the requests for the\n * different assets/playlists\n *\n * @method Html5#setCrossOrigin\n * @param {string} crossOrigin\n *         - anonymous indicates that the media should not sent cookies.\n *         - use-credentials indicates that the media should sent cookies along the requests.\n *\n * @see [Spec]{@link https://html.spec.whatwg.org/#attr-media-crossorigin}\n */\n'crossOrigin'].forEach(function (prop) {\n  Html5.prototype['set' + toTitleCase$1(prop)] = function (v) {\n    this.el_[prop] = v;\n  };\n}); // wrap native functions with a function\n// The list is as follows:\n// pause, load, play\n\n[\n/**\n * A wrapper around the media elements `pause` function. This will call the `HTML5`\n * media elements `pause` function.\n *\n * @method Html5#pause\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-pause}\n */\n'pause',\n/**\n * A wrapper around the media elements `load` function. This will call the `HTML5`s\n * media element `load` function.\n *\n * @method Html5#load\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-load}\n */\n'load',\n/**\n * A wrapper around the media elements `play` function. This will call the `HTML5`s\n * media element `play` function.\n *\n * @method Html5#play\n * @see [Spec]{@link https://www.w3.org/TR/html5/embedded-content-0.html#dom-media-play}\n */\n'play'].forEach(function (prop) {\n  Html5.prototype[prop] = function () {\n    return this.el_[prop]();\n  };\n});\nTech.withSourceHandlers(Html5);\n/**\n * Native source handler for Html5, simply passes the source to the media element.\n *\n * @property {Tech~SourceObject} source\n *        The source object\n *\n * @property {Html5} tech\n *        The instance of the HTML5 tech.\n */\n\nHtml5.nativeSourceHandler = {};\n/**\n * Check if the media element can play the given mime type.\n *\n * @param {string} type\n *        The mimetype to check\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string)\n */\n\nHtml5.nativeSourceHandler.canPlayType = function (type) {\n  // IE without MediaPlayer throws an error (#519)\n  try {\n    return Html5.TEST_VID.canPlayType(type);\n  } catch (e) {\n    return '';\n  }\n};\n/**\n * Check if the media element can handle a source natively.\n *\n * @param {Tech~SourceObject} source\n *         The source object\n *\n * @param {Object} [options]\n *         Options to be passed to the tech.\n *\n * @return {string}\n *         'probably', 'maybe', or '' (empty string).\n */\n\n\nHtml5.nativeSourceHandler.canHandleSource = function (source, options) {\n  // If a type was provided we should rely on that\n  if (source.type) {\n    return Html5.nativeSourceHandler.canPlayType(source.type); // If no type, fall back to checking 'video/[EXTENSION]'\n  } else if (source.src) {\n    var ext = getFileExtension(source.src);\n    return Html5.nativeSourceHandler.canPlayType(\"video/\" + ext);\n  }\n\n  return '';\n};\n/**\n * Pass the source to the native media element.\n *\n * @param {Tech~SourceObject} source\n *        The source object\n *\n * @param {Html5} tech\n *        The instance of the Html5 tech\n *\n * @param {Object} [options]\n *        The options to pass to the source\n */\n\n\nHtml5.nativeSourceHandler.handleSource = function (source, tech, options) {\n  tech.setSrc(source.src);\n};\n/**\n * A noop for the native dispose function, as cleanup is not needed.\n */\n\n\nHtml5.nativeSourceHandler.dispose = function () {}; // Register the native source handler\n\n\nHtml5.registerSourceHandler(Html5.nativeSourceHandler);\nTech.registerTech('Html5', Html5);\n\n// on the player when they happen\n\nvar TECH_EVENTS_RETRIGGER = [\n/**\n * Fired while the user agent is downloading media data.\n *\n * @event Player#progress\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `progress` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechProgress_\n * @fires Player#progress\n * @listens Tech#progress\n */\n'progress',\n/**\n * Fires when the loading of an audio/video is aborted.\n *\n * @event Player#abort\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `abort` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechAbort_\n * @fires Player#abort\n * @listens Tech#abort\n */\n'abort',\n/**\n * Fires when the browser is intentionally not getting media data.\n *\n * @event Player#suspend\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `suspend` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechSuspend_\n * @fires Player#suspend\n * @listens Tech#suspend\n */\n'suspend',\n/**\n * Fires when the current playlist is empty.\n *\n * @event Player#emptied\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `emptied` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechEmptied_\n * @fires Player#emptied\n * @listens Tech#emptied\n */\n'emptied',\n/**\n * Fires when the browser is trying to get media data, but data is not available.\n *\n * @event Player#stalled\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `stalled` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechStalled_\n * @fires Player#stalled\n * @listens Tech#stalled\n */\n'stalled',\n/**\n * Fires when the browser has loaded meta data for the audio/video.\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Retrigger the `loadedmetadata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoadedmetadata_\n * @fires Player#loadedmetadata\n * @listens Tech#loadedmetadata\n */\n'loadedmetadata',\n/**\n * Fires when the browser has loaded the current frame of the audio/video.\n *\n * @event Player#loadeddata\n * @type {event}\n */\n\n/**\n * Retrigger the `loadeddata` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechLoaddeddata_\n * @fires Player#loadeddata\n * @listens Tech#loadeddata\n */\n'loadeddata',\n/**\n * Fires when the current playback position has changed.\n *\n * @event Player#timeupdate\n * @type {event}\n */\n\n/**\n * Retrigger the `timeupdate` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTimeUpdate_\n * @fires Player#timeupdate\n * @listens Tech#timeupdate\n */\n'timeupdate',\n/**\n * Fires when the video's intrinsic dimensions change\n *\n * @event Player#resize\n * @type {event}\n */\n\n/**\n * Retrigger the `resize` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechResize_\n * @fires Player#resize\n * @listens Tech#resize\n */\n'resize',\n/**\n * Fires when the volume has been changed\n *\n * @event Player#volumechange\n * @type {event}\n */\n\n/**\n * Retrigger the `volumechange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechVolumechange_\n * @fires Player#volumechange\n * @listens Tech#volumechange\n */\n'volumechange',\n/**\n * Fires when the text track has been changed\n *\n * @event Player#texttrackchange\n * @type {event}\n */\n\n/**\n * Retrigger the `texttrackchange` event that was triggered by the {@link Tech}.\n *\n * @private\n * @method Player#handleTechTexttrackchange_\n * @fires Player#texttrackchange\n * @listens Tech#texttrackchange\n */\n'texttrackchange']; // events to queue when playback rate is zero\n// this is a hash for the sole purpose of mapping non-camel-cased event names\n// to camel-cased function names\n\nvar TECH_EVENTS_QUEUE = {\n  canplay: 'CanPlay',\n  canplaythrough: 'CanPlayThrough',\n  playing: 'Playing',\n  seeked: 'Seeked'\n};\nvar BREAKPOINT_ORDER = ['tiny', 'xsmall', 'small', 'medium', 'large', 'xlarge', 'huge'];\nvar BREAKPOINT_CLASSES = {}; // grep: vjs-layout-tiny\n// grep: vjs-layout-x-small\n// grep: vjs-layout-small\n// grep: vjs-layout-medium\n// grep: vjs-layout-large\n// grep: vjs-layout-x-large\n// grep: vjs-layout-huge\n\nBREAKPOINT_ORDER.forEach(function (k) {\n  var v = k.charAt(0) === 'x' ? \"x-\" + k.substring(1) : k;\n  BREAKPOINT_CLASSES[k] = \"vjs-layout-\" + v;\n});\nvar DEFAULT_BREAKPOINTS = {\n  tiny: 210,\n  xsmall: 320,\n  small: 425,\n  medium: 768,\n  large: 1440,\n  xlarge: 2560,\n  huge: Infinity\n};\n/**\n * An instance of the `Player` class is created when any of the Video.js setup methods\n * are used to initialize a video.\n *\n * After an instance has been created it can be accessed globally in two ways:\n * 1. By calling `videojs('example_video_1');`\n * 2. By using it directly via  `videojs.players.example_video_1;`\n *\n * @extends Component\n */\n\nvar Player = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(Player, _Component);\n\n  /**\n   * Create an instance of this class.\n   *\n   * @param {Element} tag\n   *        The original video DOM element used for configuring options.\n   *\n   * @param {Object} [options]\n   *        Object of option names and values.\n   *\n   * @param {Component~ReadyCallback} [ready]\n   *        Ready callback function.\n   */\n  function Player(tag, options, ready) {\n    var _this;\n\n    // Make sure tag ID exists\n    tag.id = tag.id || options.id || \"vjs_video_\" + newGUID(); // Set Options\n    // The options argument overrides options set in the video tag\n    // which overrides globally set options.\n    // This latter part coincides with the load order\n    // (tag must exist before Player)\n\n    options = assign(Player.getTagSettings(tag), options); // Delay the initialization of children because we need to set up\n    // player properties first, and can't use `this` before `super()`\n\n    options.initChildren = false; // Same with creating the element\n\n    options.createEl = false; // don't auto mixin the evented mixin\n\n    options.evented = false; // we don't want the player to report touch activity on itself\n    // see enableTouchActivity in Component\n\n    options.reportTouchActivity = false; // If language is not set, get the closest lang attribute\n\n    if (!options.language) {\n      if (typeof tag.closest === 'function') {\n        var closest = tag.closest('[lang]');\n\n        if (closest && closest.getAttribute) {\n          options.language = closest.getAttribute('lang');\n        }\n      } else {\n        var element = tag;\n\n        while (element && element.nodeType === 1) {\n          if (getAttributes(element).hasOwnProperty('lang')) {\n            options.language = element.getAttribute('lang');\n            break;\n          }\n\n          element = element.parentNode;\n        }\n      }\n    } // Run base component initializing with new options\n\n\n    _this = _Component.call(this, null, options, ready) || this; // Create bound methods for document listeners.\n\n    _this.boundDocumentFullscreenChange_ = function (e) {\n      return _this.documentFullscreenChange_(e);\n    };\n\n    _this.boundFullWindowOnEscKey_ = function (e) {\n      return _this.fullWindowOnEscKey(e);\n    };\n\n    _this.boundUpdateStyleEl_ = function (e) {\n      return _this.updateStyleEl_(e);\n    };\n\n    _this.boundApplyInitTime_ = function (e) {\n      return _this.applyInitTime_(e);\n    };\n\n    _this.boundUpdateCurrentBreakpoint_ = function (e) {\n      return _this.updateCurrentBreakpoint_(e);\n    };\n\n    _this.boundHandleTechClick_ = function (e) {\n      return _this.handleTechClick_(e);\n    };\n\n    _this.boundHandleTechDoubleClick_ = function (e) {\n      return _this.handleTechDoubleClick_(e);\n    };\n\n    _this.boundHandleTechTouchStart_ = function (e) {\n      return _this.handleTechTouchStart_(e);\n    };\n\n    _this.boundHandleTechTouchMove_ = function (e) {\n      return _this.handleTechTouchMove_(e);\n    };\n\n    _this.boundHandleTechTouchEnd_ = function (e) {\n      return _this.handleTechTouchEnd_(e);\n    };\n\n    _this.boundHandleTechTap_ = function (e) {\n      return _this.handleTechTap_(e);\n    }; // default isFullscreen_ to false\n\n\n    _this.isFullscreen_ = false; // create logger\n\n    _this.log = createLogger(_this.id_); // Hold our own reference to fullscreen api so it can be mocked in tests\n\n    _this.fsApi_ = FullscreenApi; // Tracks when a tech changes the poster\n\n    _this.isPosterFromTech_ = false; // Holds callback info that gets queued when playback rate is zero\n    // and a seek is happening\n\n    _this.queuedCallbacks_ = []; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    _this.isReady_ = false; // Init state hasStarted_\n\n    _this.hasStarted_ = false; // Init state userActive_\n\n    _this.userActive_ = false; // Init debugEnabled_\n\n    _this.debugEnabled_ = false; // Init state audioOnlyMode_\n\n    _this.audioOnlyMode_ = false; // Init state audioPosterMode_\n\n    _this.audioPosterMode_ = false; // Init state audioOnlyCache_\n\n    _this.audioOnlyCache_ = {\n      playerHeight: null,\n      hiddenChildren: []\n    }; // if the global option object was accidentally blown away by\n    // someone, bail early with an informative error\n\n    if (!_this.options_ || !_this.options_.techOrder || !_this.options_.techOrder.length) {\n      throw new Error('No techOrder specified. Did you overwrite ' + 'videojs.options instead of just changing the ' + 'properties you want to override?');\n    } // Store the original tag used to set options\n\n\n    _this.tag = tag; // Store the tag attributes used to restore html5 element\n\n    _this.tagAttributes = tag && getAttributes(tag); // Update current language\n\n    _this.language(_this.options_.language); // Update Supported Languages\n\n\n    if (options.languages) {\n      // Normalise player option languages to lowercase\n      var languagesToLower = {};\n      Object.getOwnPropertyNames(options.languages).forEach(function (name) {\n        languagesToLower[name.toLowerCase()] = options.languages[name];\n      });\n      _this.languages_ = languagesToLower;\n    } else {\n      _this.languages_ = Player.prototype.options_.languages;\n    }\n\n    _this.resetCache_(); // Set poster\n\n\n    _this.poster_ = options.poster || ''; // Set controls\n\n    _this.controls_ = !!options.controls; // Original tag settings stored in options\n    // now remove immediately so native controls don't flash.\n    // May be turned back on by HTML5 tech if nativeControlsForTouch is true\n\n    tag.controls = false;\n    tag.removeAttribute('controls');\n    _this.changingSrc_ = false;\n    _this.playCallbacks_ = [];\n    _this.playTerminatedQueue_ = []; // the attribute overrides the option\n\n    if (tag.hasAttribute('autoplay')) {\n      _this.autoplay(true);\n    } else {\n      // otherwise use the setter to validate and\n      // set the correct value.\n      _this.autoplay(_this.options_.autoplay);\n    } // check plugins\n\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        if (typeof _this[name] !== 'function') {\n          throw new Error(\"plugin \\\"\" + name + \"\\\" does not exist\");\n        }\n      });\n    }\n    /*\n     * Store the internal state of scrubbing\n     *\n     * @private\n     * @return {Boolean} True if the user is scrubbing\n     */\n\n\n    _this.scrubbing_ = false;\n    _this.el_ = _this.createEl(); // Make this an evented object and use `el_` as its event bus.\n\n    evented(_assertThisInitialized(_this), {\n      eventBusKey: 'el_'\n    }); // listen to document and player fullscreenchange handlers so we receive those events\n    // before a user can receive them so we can update isFullscreen appropriately.\n    // make sure that we listen to fullscreenchange events before everything else to make sure that\n    // our isFullscreen method is updated properly for internal components as well as external.\n\n    if (_this.fsApi_.requestFullscreen) {\n      on(document, _this.fsApi_.fullscreenchange, _this.boundDocumentFullscreenChange_);\n\n      _this.on(_this.fsApi_.fullscreenchange, _this.boundDocumentFullscreenChange_);\n    }\n\n    if (_this.fluid_) {\n      _this.on(['playerreset', 'resize'], _this.boundUpdateStyleEl_);\n    } // We also want to pass the original player options to each component and plugin\n    // as well so they don't need to reach back into the player for options later.\n    // We also need to do another copy of this.options_ so we don't end up with\n    // an infinite loop.\n\n\n    var playerOptionsCopy = mergeOptions$3(_this.options_); // Load plugins\n\n    if (options.plugins) {\n      Object.keys(options.plugins).forEach(function (name) {\n        _this[name](options.plugins[name]);\n      });\n    } // Enable debug mode to fire debugon event for all plugins.\n\n\n    if (options.debug) {\n      _this.debug(true);\n    }\n\n    _this.options_.playerOptions = playerOptionsCopy;\n    _this.middleware_ = [];\n\n    _this.playbackRates(options.playbackRates);\n\n    _this.initChildren(); // Set isAudio based on whether or not an audio tag was used\n\n\n    _this.isAudio(tag.nodeName.toLowerCase() === 'audio'); // Update controls className. Can't do this when the controls are initially\n    // set because the element doesn't exist yet.\n\n\n    if (_this.controls()) {\n      _this.addClass('vjs-controls-enabled');\n    } else {\n      _this.addClass('vjs-controls-disabled');\n    } // Set ARIA label and region role depending on player type\n\n\n    _this.el_.setAttribute('role', 'region');\n\n    if (_this.isAudio()) {\n      _this.el_.setAttribute('aria-label', _this.localize('Audio Player'));\n    } else {\n      _this.el_.setAttribute('aria-label', _this.localize('Video Player'));\n    }\n\n    if (_this.isAudio()) {\n      _this.addClass('vjs-audio');\n    }\n\n    if (_this.flexNotSupported_()) {\n      _this.addClass('vjs-no-flex');\n    } // TODO: Make this smarter. Toggle user state between touching/mousing\n    // using events, since devices can have both touch and mouse events.\n    // TODO: Make this check be performed again when the window switches between monitors\n    // (See https://github.com/videojs/video.js/issues/5683)\n\n\n    if (TOUCH_ENABLED) {\n      _this.addClass('vjs-touch-enabled');\n    } // iOS Safari has broken hover handling\n\n\n    if (!IS_IOS) {\n      _this.addClass('vjs-workinghover');\n    } // Make player easily findable by ID\n\n\n    Player.players[_this.id_] = _assertThisInitialized(_this); // Add a major version class to aid css in plugins\n\n    var majorVersion = version$5.split('.')[0];\n\n    _this.addClass(\"vjs-v\" + majorVersion); // When the player is first initialized, trigger activity so components\n    // like the control bar show themselves if needed\n\n\n    _this.userActive(true);\n\n    _this.reportUserActivity();\n\n    _this.one('play', function (e) {\n      return _this.listenForUserActivity_(e);\n    });\n\n    _this.on('stageclick', function (e) {\n      return _this.handleStageClick_(e);\n    });\n\n    _this.on('keydown', function (e) {\n      return _this.handleKeyDown(e);\n    });\n\n    _this.on('languagechange', function (e) {\n      return _this.handleLanguagechange(e);\n    });\n\n    _this.breakpoints(_this.options_.breakpoints);\n\n    _this.responsive(_this.options_.responsive); // Calling both the audio mode methods after the player is fully\n    // setup to be able to listen to the events triggered by them\n\n\n    _this.on('ready', function () {\n      // Calling the audioPosterMode method first so that\n      // the audioOnlyMode can take precedence when both options are set to true\n      _this.audioPosterMode(_this.options_.audioPosterMode);\n\n      _this.audioOnlyMode(_this.options_.audioOnlyMode);\n    });\n\n    return _this;\n  }\n  /**\n   * Destroys the video player and does any necessary cleanup.\n   *\n   * This is especially helpful if you are dynamically adding and removing videos\n   * to/from the DOM.\n   *\n   * @fires Player#dispose\n   */\n\n\n  var _proto = Player.prototype;\n\n  _proto.dispose = function dispose() {\n    var _this2 = this;\n\n    /**\n     * Called when the player is being disposed of.\n     *\n     * @event Player#dispose\n     * @type {EventTarget~Event}\n     */\n    this.trigger('dispose'); // prevent dispose from being called twice\n\n    this.off('dispose'); // Make sure all player-specific document listeners are unbound. This is\n\n    off(document, this.fsApi_.fullscreenchange, this.boundDocumentFullscreenChange_);\n    off(document, 'keydown', this.boundFullWindowOnEscKey_);\n\n    if (this.styleEl_ && this.styleEl_.parentNode) {\n      this.styleEl_.parentNode.removeChild(this.styleEl_);\n      this.styleEl_ = null;\n    } // Kill reference to this player\n\n\n    Player.players[this.id_] = null;\n\n    if (this.tag && this.tag.player) {\n      this.tag.player = null;\n    }\n\n    if (this.el_ && this.el_.player) {\n      this.el_.player = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.dispose();\n      this.isPosterFromTech_ = false;\n      this.poster_ = '';\n    }\n\n    if (this.playerElIngest_) {\n      this.playerElIngest_ = null;\n    }\n\n    if (this.tag) {\n      this.tag = null;\n    }\n\n    clearCacheForPlayer(this); // remove all event handlers for track lists\n    // all tracks and track listeners are removed on\n    // tech dispose\n\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n\n      var list = _this2[props.getterName](); // if it is not a native list\n      // we have to manually remove event listeners\n\n\n      if (list && list.off) {\n        list.off();\n      }\n    }); // the actual .el_ is removed here, or replaced if\n\n    _Component.prototype.dispose.call(this, {\n      restoreEl: this.options_.restoreEl\n    });\n  }\n  /**\n   * Create the `Player`'s DOM element.\n   *\n   * @return {Element}\n   *         The DOM element that gets created.\n   */\n  ;\n\n  _proto.createEl = function createEl() {\n    var tag = this.tag;\n    var el;\n    var playerElIngest = this.playerElIngest_ = tag.parentNode && tag.parentNode.hasAttribute && tag.parentNode.hasAttribute('data-vjs-player');\n    var divEmbed = this.tag.tagName.toLowerCase() === 'video-js';\n\n    if (playerElIngest) {\n      el = this.el_ = tag.parentNode;\n    } else if (!divEmbed) {\n      el = this.el_ = _Component.prototype.createEl.call(this, 'div');\n    } // Copy over all the attributes from the tag, including ID and class\n    // ID will now reference player box, not the video tag\n\n\n    var attrs = getAttributes(tag);\n\n    if (divEmbed) {\n      el = this.el_ = tag;\n      tag = this.tag = document.createElement('video');\n\n      while (el.children.length) {\n        tag.appendChild(el.firstChild);\n      }\n\n      if (!hasClass(el, 'video-js')) {\n        addClass(el, 'video-js');\n      }\n\n      el.appendChild(tag);\n      playerElIngest = this.playerElIngest_ = el; // move properties over from our custom `video-js` element\n      // to our new `video` element. This will move things like\n      // `src` or `controls` that were set via js before the player\n      // was initialized.\n\n      Object.keys(el).forEach(function (k) {\n        try {\n          tag[k] = el[k];\n        } catch (e) {// we got a a property like outerHTML which we can't actually copy, ignore it\n        }\n      });\n    } // set tabindex to -1 to remove the video element from the focus order\n\n\n    tag.setAttribute('tabindex', '-1');\n    attrs.tabindex = '-1'; // Workaround for #4583 (JAWS+IE doesn't announce BPB or play button), and\n    // for the same issue with Chrome (on Windows) with JAWS.\n    // See https://github.com/FreedomScientific/VFO-standards-support/issues/78\n    // Note that we can't detect if JAWS is being used, but this ARIA attribute\n    //  doesn't change behavior of IE11 or Chrome if JAWS is not being used\n\n    if (IE_VERSION || IS_CHROME && IS_WINDOWS) {\n      tag.setAttribute('role', 'application');\n      attrs.role = 'application';\n    } // Remove width/height attrs from tag so CSS can make it 100% width/height\n\n\n    tag.removeAttribute('width');\n    tag.removeAttribute('height');\n\n    if ('width' in attrs) {\n      delete attrs.width;\n    }\n\n    if ('height' in attrs) {\n      delete attrs.height;\n    }\n\n    Object.getOwnPropertyNames(attrs).forEach(function (attr) {\n      // don't copy over the class attribute to the player element when we're in a div embed\n      // the class is already set up properly in the divEmbed case\n      // and we want to make sure that the `video-js` class doesn't get lost\n      if (!(divEmbed && attr === 'class')) {\n        el.setAttribute(attr, attrs[attr]);\n      }\n\n      if (divEmbed) {\n        tag.setAttribute(attr, attrs[attr]);\n      }\n    }); // Update tag id/class for use as HTML5 playback tech\n    // Might think we should do this after embedding in container so .vjs-tech class\n    // doesn't flash 100% width/height, but class only applies with .video-js parent\n\n    tag.playerId = tag.id;\n    tag.id += '_html5_api';\n    tag.className = 'vjs-tech'; // Make player findable on elements\n\n    tag.player = el.player = this; // Default state of video is paused\n\n    this.addClass('vjs-paused'); // Add a style element in the player that we'll use to set the width/height\n    // of the player in a way that's still overrideable by CSS, just like the\n    // video element\n\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true) {\n      this.styleEl_ = createStyleElement('vjs-styles-dimensions');\n      var defaultsStyleEl = $('.vjs-styles-defaults');\n      var head = $('head');\n      head.insertBefore(this.styleEl_, defaultsStyleEl ? defaultsStyleEl.nextSibling : head.firstChild);\n    }\n\n    this.fill_ = false;\n    this.fluid_ = false; // Pass in the width/height/aspectRatio options which will update the style el\n\n    this.width(this.options_.width);\n    this.height(this.options_.height);\n    this.fill(this.options_.fill);\n    this.fluid(this.options_.fluid);\n    this.aspectRatio(this.options_.aspectRatio); // support both crossOrigin and crossorigin to reduce confusion and issues around the name\n\n    this.crossOrigin(this.options_.crossOrigin || this.options_.crossorigin); // Hide any links within the video/audio tag,\n    // because IE doesn't hide them completely from screen readers.\n\n    var links = tag.getElementsByTagName('a');\n\n    for (var i = 0; i < links.length; i++) {\n      var linkEl = links.item(i);\n      addClass(linkEl, 'vjs-hidden');\n      linkEl.setAttribute('hidden', 'hidden');\n    } // insertElFirst seems to cause the networkState to flicker from 3 to 2, so\n    // keep track of the original for later so we can know if the source originally failed\n\n\n    tag.initNetworkState_ = tag.networkState; // Wrap video tag in div (el/box) container\n\n    if (tag.parentNode && !playerElIngest) {\n      tag.parentNode.insertBefore(el, tag);\n    } // insert the tag as the first child of the player element\n    // then manually add it to the children array so that this.addChild\n    // will work properly for other components\n    //\n    // Breaks iPhone, fixed in HTML5 setup.\n\n\n    prependTo(tag, el);\n    this.children_.unshift(tag); // Set lang attr on player to ensure CSS :lang() in consistent with player\n    // if it's been set to something different to the doc\n\n    this.el_.setAttribute('lang', this.language_);\n    this.el_.setAttribute('translate', 'no');\n    this.el_ = el;\n    return el;\n  }\n  /**\n   * Get or set the `Player`'s crossOrigin option. For the HTML5 player, this\n   * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n   * behavior.\n   *\n   * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n   *\n   * @param {string} [value]\n   *        The value to set the `Player`'s crossOrigin to. If an argument is\n   *        given, must be one of `anonymous` or `use-credentials`.\n   *\n   * @return {string|undefined}\n   *         - The current crossOrigin value of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.crossOrigin = function crossOrigin(value) {\n    if (!value) {\n      return this.techGet_('crossOrigin');\n    }\n\n    if (value !== 'anonymous' && value !== 'use-credentials') {\n      log$1.warn(\"crossOrigin must be \\\"anonymous\\\" or \\\"use-credentials\\\", given \\\"\" + value + \"\\\"\");\n      return;\n    }\n\n    this.techCall_('setCrossOrigin', value);\n    return;\n  }\n  /**\n   * A getter/setter for the `Player`'s width. Returns the player's configured value.\n   * To get the current width use `currentWidth()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s width to.\n   *\n   * @return {number}\n   *         The current width of the `Player` when getting.\n   */\n  ;\n\n  _proto.width = function width(value) {\n    return this.dimension('width', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s height. Returns the player's configured value.\n   * To get the current height use `currentheight()`.\n   *\n   * @param {number} [value]\n   *        The value to set the `Player`'s heigth to.\n   *\n   * @return {number}\n   *         The current height of the `Player` when getting.\n   */\n  ;\n\n  _proto.height = function height(value) {\n    return this.dimension('height', value);\n  }\n  /**\n   * A getter/setter for the `Player`'s width & height.\n   *\n   * @param {string} dimension\n   *        This string can be:\n   *        - 'width'\n   *        - 'height'\n   *\n   * @param {number} [value]\n   *        Value for dimension specified in the first argument.\n   *\n   * @return {number}\n   *         The dimension arguments value when getting (width/height).\n   */\n  ;\n\n  _proto.dimension = function dimension(_dimension, value) {\n    var privDimension = _dimension + '_';\n\n    if (value === undefined) {\n      return this[privDimension] || 0;\n    }\n\n    if (value === '' || value === 'auto') {\n      // If an empty string is given, reset the dimension to be automatic\n      this[privDimension] = undefined;\n      this.updateStyleEl_();\n      return;\n    }\n\n    var parsedVal = parseFloat(value);\n\n    if (isNaN(parsedVal)) {\n      log$1.error(\"Improper value \\\"\" + value + \"\\\" supplied for for \" + _dimension);\n      return;\n    }\n\n    this[privDimension] = parsedVal;\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fluid `className` on the `Player`.\n   *\n   * Turning this on will turn off fill mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fluid = function fluid(bool) {\n    var _this3 = this;\n\n    if (bool === undefined) {\n      return !!this.fluid_;\n    }\n\n    this.fluid_ = !!bool;\n\n    if (isEvented(this)) {\n      this.off(['playerreset', 'resize'], this.boundUpdateStyleEl_);\n    }\n\n    if (bool) {\n      this.addClass('vjs-fluid');\n      this.fill(false);\n      addEventedCallback(this, function () {\n        _this3.on(['playerreset', 'resize'], _this3.boundUpdateStyleEl_);\n      });\n    } else {\n      this.removeClass('vjs-fluid');\n    }\n\n    this.updateStyleEl_();\n  }\n  /**\n   * A getter/setter/toggler for the vjs-fill `className` on the `Player`.\n   *\n   * Turning this on will turn off fluid mode.\n   *\n   * @param {boolean} [bool]\n   *        - A value of true adds the class.\n   *        - A value of false removes the class.\n   *        - No value will be a getter.\n   *\n   * @return {boolean|undefined}\n   *         - The value of fluid when getting.\n   *         - `undefined` when setting.\n   */\n  ;\n\n  _proto.fill = function fill(bool) {\n    if (bool === undefined) {\n      return !!this.fill_;\n    }\n\n    this.fill_ = !!bool;\n\n    if (bool) {\n      this.addClass('vjs-fill');\n      this.fluid(false);\n    } else {\n      this.removeClass('vjs-fill');\n    }\n  }\n  /**\n   * Get/Set the aspect ratio\n   *\n   * @param {string} [ratio]\n   *        Aspect ratio for player\n   *\n   * @return {string|undefined}\n   *         returns the current aspect ratio when getting\n   */\n\n  /**\n   * A getter/setter for the `Player`'s aspect ratio.\n   *\n   * @param {string} [ratio]\n   *        The value to set the `Player`'s aspect ratio to.\n   *\n   * @return {string|undefined}\n   *         - The current aspect ratio of the `Player` when getting.\n   *         - undefined when setting\n   */\n  ;\n\n  _proto.aspectRatio = function aspectRatio(ratio) {\n    if (ratio === undefined) {\n      return this.aspectRatio_;\n    } // Check for width:height format\n\n\n    if (!/^\\d+\\:\\d+$/.test(ratio)) {\n      throw new Error('Improper value supplied for aspect ratio. The format should be width:height, for example 16:9.');\n    }\n\n    this.aspectRatio_ = ratio; // We're assuming if you set an aspect ratio you want fluid mode,\n    // because in fixed mode you could calculate width and height yourself.\n\n    this.fluid(true);\n    this.updateStyleEl_();\n  }\n  /**\n   * Update styles of the `Player` element (height, width and aspect ratio).\n   *\n   * @private\n   * @listens Tech#loadedmetadata\n   */\n  ;\n\n  _proto.updateStyleEl_ = function updateStyleEl_() {\n    if (window$1.VIDEOJS_NO_DYNAMIC_STYLE === true) {\n      var _width = typeof this.width_ === 'number' ? this.width_ : this.options_.width;\n\n      var _height = typeof this.height_ === 'number' ? this.height_ : this.options_.height;\n\n      var techEl = this.tech_ && this.tech_.el();\n\n      if (techEl) {\n        if (_width >= 0) {\n          techEl.width = _width;\n        }\n\n        if (_height >= 0) {\n          techEl.height = _height;\n        }\n      }\n\n      return;\n    }\n\n    var width;\n    var height;\n    var aspectRatio;\n    var idClass; // The aspect ratio is either used directly or to calculate width and height.\n\n    if (this.aspectRatio_ !== undefined && this.aspectRatio_ !== 'auto') {\n      // Use any aspectRatio that's been specifically set\n      aspectRatio = this.aspectRatio_;\n    } else if (this.videoWidth() > 0) {\n      // Otherwise try to get the aspect ratio from the video metadata\n      aspectRatio = this.videoWidth() + ':' + this.videoHeight();\n    } else {\n      // Or use a default. The video element's is 2:1, but 16:9 is more common.\n      aspectRatio = '16:9';\n    } // Get the ratio as a decimal we can use to calculate dimensions\n\n\n    var ratioParts = aspectRatio.split(':');\n    var ratioMultiplier = ratioParts[1] / ratioParts[0];\n\n    if (this.width_ !== undefined) {\n      // Use any width that's been specifically set\n      width = this.width_;\n    } else if (this.height_ !== undefined) {\n      // Or calulate the width from the aspect ratio if a height has been set\n      width = this.height_ / ratioMultiplier;\n    } else {\n      // Or use the video's metadata, or use the video el's default of 300\n      width = this.videoWidth() || 300;\n    }\n\n    if (this.height_ !== undefined) {\n      // Use any height that's been specifically set\n      height = this.height_;\n    } else {\n      // Otherwise calculate the height from the ratio and the width\n      height = width * ratioMultiplier;\n    } // Ensure the CSS class is valid by starting with an alpha character\n\n\n    if (/^[^a-zA-Z]/.test(this.id())) {\n      idClass = 'dimensions-' + this.id();\n    } else {\n      idClass = this.id() + '-dimensions';\n    } // Ensure the right class is still on the player for the style element\n\n\n    this.addClass(idClass);\n    setTextContent(this.styleEl_, \"\\n      .\" + idClass + \" {\\n        width: \" + width + \"px;\\n        height: \" + height + \"px;\\n      }\\n\\n      .\" + idClass + \".vjs-fluid:not(.vjs-audio-only-mode) {\\n        padding-top: \" + ratioMultiplier * 100 + \"%;\\n      }\\n    \");\n  }\n  /**\n   * Load/Create an instance of playback {@link Tech} including element\n   * and API methods. Then append the `Tech` element in `Player` as a child.\n   *\n   * @param {string} techName\n   *        name of the playback technology\n   *\n   * @param {string} source\n   *        video source\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadTech_ = function loadTech_(techName, source) {\n    var _this4 = this;\n\n    // Pause and remove current playback technology\n    if (this.tech_) {\n      this.unloadTech_();\n    }\n\n    var titleTechName = toTitleCase$1(techName);\n    var camelTechName = techName.charAt(0).toLowerCase() + techName.slice(1); // get rid of the HTML5 video tag as soon as we are using another tech\n\n    if (titleTechName !== 'Html5' && this.tag) {\n      Tech.getTech('Html5').disposeMediaElement(this.tag);\n      this.tag.player = null;\n      this.tag = null;\n    }\n\n    this.techName_ = titleTechName; // Turn off API access because we're loading a new tech that might load asynchronously\n\n    this.isReady_ = false;\n    var autoplay = this.autoplay(); // if autoplay is a string (or `true` with normalizeAutoplay: true) we pass false to the tech\n    // because the player is going to handle autoplay on `loadstart`\n\n    if (typeof this.autoplay() === 'string' || this.autoplay() === true && this.options_.normalizeAutoplay) {\n      autoplay = false;\n    } // Grab tech-specific options from player options and add source and parent element to use.\n\n\n    var techOptions = {\n      source: source,\n      autoplay: autoplay,\n      'nativeControlsForTouch': this.options_.nativeControlsForTouch,\n      'playerId': this.id(),\n      'techId': this.id() + \"_\" + camelTechName + \"_api\",\n      'playsinline': this.options_.playsinline,\n      'preload': this.options_.preload,\n      'loop': this.options_.loop,\n      'disablePictureInPicture': this.options_.disablePictureInPicture,\n      'muted': this.options_.muted,\n      'poster': this.poster(),\n      'language': this.language(),\n      'playerElIngest': this.playerElIngest_ || false,\n      'vtt.js': this.options_['vtt.js'],\n      'canOverridePoster': !!this.options_.techCanOverridePoster,\n      'enableSourceset': this.options_.enableSourceset,\n      'Promise': this.options_.Promise\n    };\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      techOptions[props.getterName] = _this4[props.privateName];\n    });\n    assign(techOptions, this.options_[titleTechName]);\n    assign(techOptions, this.options_[camelTechName]);\n    assign(techOptions, this.options_[techName.toLowerCase()]);\n\n    if (this.tag) {\n      techOptions.tag = this.tag;\n    }\n\n    if (source && source.src === this.cache_.src && this.cache_.currentTime > 0) {\n      techOptions.startTime = this.cache_.currentTime;\n    } // Initialize tech instance\n\n\n    var TechClass = Tech.getTech(techName);\n\n    if (!TechClass) {\n      throw new Error(\"No Tech named '\" + titleTechName + \"' exists! '\" + titleTechName + \"' should be registered using videojs.registerTech()'\");\n    }\n\n    this.tech_ = new TechClass(techOptions); // player.triggerReady is always async, so don't need this to be async\n\n    this.tech_.ready(bind(this, this.handleTechReady_), true);\n    textTrackConverter.jsonToTextTracks(this.textTracksJson_ || [], this.tech_); // Listen to all HTML5-defined events and trigger them on the player\n\n    TECH_EVENTS_RETRIGGER.forEach(function (event) {\n      _this4.on(_this4.tech_, event, function (e) {\n        return _this4[\"handleTech\" + toTitleCase$1(event) + \"_\"](e);\n      });\n    });\n    Object.keys(TECH_EVENTS_QUEUE).forEach(function (event) {\n      _this4.on(_this4.tech_, event, function (eventObj) {\n        if (_this4.tech_.playbackRate() === 0 && _this4.tech_.seeking()) {\n          _this4.queuedCallbacks_.push({\n            callback: _this4[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"].bind(_this4),\n            event: eventObj\n          });\n\n          return;\n        }\n\n        _this4[\"handleTech\" + TECH_EVENTS_QUEUE[event] + \"_\"](eventObj);\n      });\n    });\n    this.on(this.tech_, 'loadstart', function (e) {\n      return _this4.handleTechLoadStart_(e);\n    });\n    this.on(this.tech_, 'sourceset', function (e) {\n      return _this4.handleTechSourceset_(e);\n    });\n    this.on(this.tech_, 'waiting', function (e) {\n      return _this4.handleTechWaiting_(e);\n    });\n    this.on(this.tech_, 'ended', function (e) {\n      return _this4.handleTechEnded_(e);\n    });\n    this.on(this.tech_, 'seeking', function (e) {\n      return _this4.handleTechSeeking_(e);\n    });\n    this.on(this.tech_, 'play', function (e) {\n      return _this4.handleTechPlay_(e);\n    });\n    this.on(this.tech_, 'firstplay', function (e) {\n      return _this4.handleTechFirstPlay_(e);\n    });\n    this.on(this.tech_, 'pause', function (e) {\n      return _this4.handleTechPause_(e);\n    });\n    this.on(this.tech_, 'durationchange', function (e) {\n      return _this4.handleTechDurationChange_(e);\n    });\n    this.on(this.tech_, 'fullscreenchange', function (e, data) {\n      return _this4.handleTechFullscreenChange_(e, data);\n    });\n    this.on(this.tech_, 'fullscreenerror', function (e, err) {\n      return _this4.handleTechFullscreenError_(e, err);\n    });\n    this.on(this.tech_, 'enterpictureinpicture', function (e) {\n      return _this4.handleTechEnterPictureInPicture_(e);\n    });\n    this.on(this.tech_, 'leavepictureinpicture', function (e) {\n      return _this4.handleTechLeavePictureInPicture_(e);\n    });\n    this.on(this.tech_, 'error', function (e) {\n      return _this4.handleTechError_(e);\n    });\n    this.on(this.tech_, 'posterchange', function (e) {\n      return _this4.handleTechPosterChange_(e);\n    });\n    this.on(this.tech_, 'textdata', function (e) {\n      return _this4.handleTechTextData_(e);\n    });\n    this.on(this.tech_, 'ratechange', function (e) {\n      return _this4.handleTechRateChange_(e);\n    });\n    this.on(this.tech_, 'loadedmetadata', this.boundUpdateStyleEl_);\n    this.usingNativeControls(this.techGet_('controls'));\n\n    if (this.controls() && !this.usingNativeControls()) {\n      this.addTechControlsListeners_();\n    } // Add the tech element in the DOM if it was not already there\n    // Make sure to not insert the original video element if using Html5\n\n\n    if (this.tech_.el().parentNode !== this.el() && (titleTechName !== 'Html5' || !this.tag)) {\n      prependTo(this.tech_.el(), this.el());\n    } // Get rid of the original video tag reference after the first tech is loaded\n\n\n    if (this.tag) {\n      this.tag.player = null;\n      this.tag = null;\n    }\n  }\n  /**\n   * Unload and dispose of the current playback {@link Tech}.\n   *\n   * @private\n   */\n  ;\n\n  _proto.unloadTech_ = function unloadTech_() {\n    var _this5 = this;\n\n    // Save the current text tracks so that we can reuse the same text tracks with the next tech\n    ALL.names.forEach(function (name) {\n      var props = ALL[name];\n      _this5[props.privateName] = _this5[props.getterName]();\n    });\n    this.textTracksJson_ = textTrackConverter.textTracksToJson(this.tech_);\n    this.isReady_ = false;\n    this.tech_.dispose();\n    this.tech_ = false;\n\n    if (this.isPosterFromTech_) {\n      this.poster_ = '';\n      this.trigger('posterchange');\n    }\n\n    this.isPosterFromTech_ = false;\n  }\n  /**\n   * Return a reference to the current {@link Tech}.\n   * It will print a warning by default about the danger of using the tech directly\n   * but any argument that is passed in will silence the warning.\n   *\n   * @param {*} [safety]\n   *        Anything passed in to silence the warning\n   *\n   * @return {Tech}\n   *         The Tech\n   */\n  ;\n\n  _proto.tech = function tech(safety) {\n    if (safety === undefined) {\n      log$1.warn('Using the tech directly can be dangerous. I hope you know what you\\'re doing.\\n' + 'See https://github.com/videojs/video.js/issues/2617 for more info.\\n');\n    }\n\n    return this.tech_;\n  }\n  /**\n   * Set up click and touch listeners for the playback element\n   *\n   * - On desktops: a click on the video itself will toggle playback\n   * - On mobile devices: a click on the video toggles controls\n   *   which is done by toggling the user state between active and\n   *   inactive\n   * - A tap can signal that a user has become active or has become inactive\n   *   e.g. a quick tap on an iPhone movie should reveal the controls. Another\n   *   quick tap should hide them again (signaling the user is in an inactive\n   *   viewing state)\n   * - In addition to this, we still want the user to be considered inactive after\n   *   a few seconds of inactivity.\n   *\n   * > Note: the only part of iOS interaction we can't mimic with this setup\n   * is a touch and hold on the video element counting as activity in order to\n   * keep the controls showing, but that shouldn't be an issue. A touch and hold\n   * on any controls will still keep the user active\n   *\n   * @private\n   */\n  ;\n\n  _proto.addTechControlsListeners_ = function addTechControlsListeners_() {\n    // Make sure to remove all the previous listeners in case we are called multiple times.\n    this.removeTechControlsListeners_();\n    this.on(this.tech_, 'click', this.boundHandleTechClick_);\n    this.on(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_); // If the controls were hidden we don't want that to change without a tap event\n    // so we'll check if the controls were already showing before reporting user\n    // activity\n\n    this.on(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n    this.on(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n    this.on(this.tech_, 'touchend', this.boundHandleTechTouchEnd_); // The tap listener needs to come after the touchend listener because the tap\n    // listener cancels out any reportedUserActivity when setting userActive(false)\n\n    this.on(this.tech_, 'tap', this.boundHandleTechTap_);\n  }\n  /**\n   * Remove the listeners used for click and tap controls. This is needed for\n   * toggling to controls disabled, where a tap/touch should do nothing.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeTechControlsListeners_ = function removeTechControlsListeners_() {\n    // We don't want to just use `this.off()` because there might be other needed\n    // listeners added by techs that extend this.\n    this.off(this.tech_, 'tap', this.boundHandleTechTap_);\n    this.off(this.tech_, 'touchstart', this.boundHandleTechTouchStart_);\n    this.off(this.tech_, 'touchmove', this.boundHandleTechTouchMove_);\n    this.off(this.tech_, 'touchend', this.boundHandleTechTouchEnd_);\n    this.off(this.tech_, 'click', this.boundHandleTechClick_);\n    this.off(this.tech_, 'dblclick', this.boundHandleTechDoubleClick_);\n  }\n  /**\n   * Player waits for the tech to be ready\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleTechReady_ = function handleTechReady_() {\n    this.triggerReady(); // Keep the same volume as before\n\n    if (this.cache_.volume) {\n      this.techCall_('setVolume', this.cache_.volume);\n    } // Look if the tech found a higher resolution poster while loading\n\n\n    this.handleTechPosterChange_(); // Update the duration if available\n\n    this.handleTechDurationChange_();\n  }\n  /**\n   * Retrigger the `loadstart` event that was triggered by the {@link Tech}. This\n   * function will also trigger {@link Player#firstplay} if it is the first loadstart\n   * for a video.\n   *\n   * @fires Player#loadstart\n   * @fires Player#firstplay\n   * @listens Tech#loadstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechLoadStart_ = function handleTechLoadStart_() {\n    // TODO: Update to use `emptied` event instead. See #1277.\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-seeking'); // reset the error state\n\n    this.error(null); // Update the duration\n\n    this.handleTechDurationChange_(); // If it's already playing we want to trigger a firstplay event now.\n    // The firstplay event relies on both the play and loadstart events\n    // which can happen in any order for a new source\n\n    if (!this.paused()) {\n      /**\n       * Fired when the user agent begins looking for media data\n       *\n       * @event Player#loadstart\n       * @type {EventTarget~Event}\n       */\n      this.trigger('loadstart');\n      this.trigger('firstplay');\n    } else {\n      // reset the hasStarted state\n      this.hasStarted(false);\n      this.trigger('loadstart');\n    } // autoplay happens after loadstart for the browser,\n    // so we mimic that behavior\n\n\n    this.manualAutoplay_(this.autoplay() === true && this.options_.normalizeAutoplay ? 'play' : this.autoplay());\n  }\n  /**\n   * Handle autoplay string values, rather than the typical boolean\n   * values that should be handled by the tech. Note that this is not\n   * part of any specification. Valid values and what they do can be\n   * found on the autoplay getter at Player#autoplay()\n   */\n  ;\n\n  _proto.manualAutoplay_ = function manualAutoplay_(type) {\n    var _this6 = this;\n\n    if (!this.tech_ || typeof type !== 'string') {\n      return;\n    } // Save original muted() value, set muted to true, and attempt to play().\n    // On promise rejection, restore muted from saved value\n\n\n    var resolveMuted = function resolveMuted() {\n      var previouslyMuted = _this6.muted();\n\n      _this6.muted(true);\n\n      var restoreMuted = function restoreMuted() {\n        _this6.muted(previouslyMuted);\n      }; // restore muted on play terminatation\n\n\n      _this6.playTerminatedQueue_.push(restoreMuted);\n\n      var mutedPromise = _this6.play();\n\n      if (!isPromise(mutedPromise)) {\n        return;\n      }\n\n      return mutedPromise[\"catch\"](function (err) {\n        restoreMuted();\n        throw new Error(\"Rejection at manualAutoplay. Restoring muted value. \" + (err ? err : ''));\n      });\n    };\n\n    var promise; // if muted defaults to true\n    // the only thing we can do is call play\n\n    if (type === 'any' && !this.muted()) {\n      promise = this.play();\n\n      if (isPromise(promise)) {\n        promise = promise[\"catch\"](resolveMuted);\n      }\n    } else if (type === 'muted' && !this.muted()) {\n      promise = resolveMuted();\n    } else {\n      promise = this.play();\n    }\n\n    if (!isPromise(promise)) {\n      return;\n    }\n\n    return promise.then(function () {\n      _this6.trigger({\n        type: 'autoplay-success',\n        autoplay: type\n      });\n    })[\"catch\"](function () {\n      _this6.trigger({\n        type: 'autoplay-failure',\n        autoplay: type\n      });\n    });\n  }\n  /**\n   * Update the internal source caches so that we return the correct source from\n   * `src()`, `currentSource()`, and `currentSources()`.\n   *\n   * > Note: `currentSources` will not be updated if the source that is passed in exists\n   *         in the current `currentSources` cache.\n   *\n   *\n   * @param {Tech~SourceObject} srcObj\n   *        A string or object source to update our caches to.\n   */\n  ;\n\n  _proto.updateSourceCaches_ = function updateSourceCaches_(srcObj) {\n    if (srcObj === void 0) {\n      srcObj = '';\n    }\n\n    var src = srcObj;\n    var type = '';\n\n    if (typeof src !== 'string') {\n      src = srcObj.src;\n      type = srcObj.type;\n    } // make sure all the caches are set to default values\n    // to prevent null checking\n\n\n    this.cache_.source = this.cache_.source || {};\n    this.cache_.sources = this.cache_.sources || []; // try to get the type of the src that was passed in\n\n    if (src && !type) {\n      type = findMimetype(this, src);\n    } // update `currentSource` cache always\n\n\n    this.cache_.source = mergeOptions$3({}, srcObj, {\n      src: src,\n      type: type\n    });\n    var matchingSources = this.cache_.sources.filter(function (s) {\n      return s.src && s.src === src;\n    });\n    var sourceElSources = [];\n    var sourceEls = this.$$('source');\n    var matchingSourceEls = [];\n\n    for (var i = 0; i < sourceEls.length; i++) {\n      var sourceObj = getAttributes(sourceEls[i]);\n      sourceElSources.push(sourceObj);\n\n      if (sourceObj.src && sourceObj.src === src) {\n        matchingSourceEls.push(sourceObj.src);\n      }\n    } // if we have matching source els but not matching sources\n    // the current source cache is not up to date\n\n\n    if (matchingSourceEls.length && !matchingSources.length) {\n      this.cache_.sources = sourceElSources; // if we don't have matching source or source els set the\n      // sources cache to the `currentSource` cache\n    } else if (!matchingSources.length) {\n      this.cache_.sources = [this.cache_.source];\n    } // update the tech `src` cache\n\n\n    this.cache_.src = src;\n  }\n  /**\n   * *EXPERIMENTAL* Fired when the source is set or changed on the {@link Tech}\n   * causing the media element to reload.\n   *\n   * It will fire for the initial source and each subsequent source.\n   * This event is a custom event from Video.js and is triggered by the {@link Tech}.\n   *\n   * The event object for this event contains a `src` property that will contain the source\n   * that was available when the event was triggered. This is generally only necessary if Video.js\n   * is switching techs while the source was being changed.\n   *\n   * It is also fired when `load` is called on the player (or media element)\n   * because the {@link https://html.spec.whatwg.org/multipage/media.html#dom-media-load|specification for `load`}\n   * says that the resource selection algorithm needs to be aborted and restarted.\n   * In this case, it is very likely that the `src` property will be set to the\n   * empty string `\"\"` to indicate we do not know what the source will be but\n   * that it is changing.\n   *\n   * *This event is currently still experimental and may change in minor releases.*\n   * __To use this, pass `enableSourceset` option to the player.__\n   *\n   * @event Player#sourceset\n   * @type {EventTarget~Event}\n   * @prop {string} src\n   *                The source url available when the `sourceset` was triggered.\n   *                It will be an empty string if we cannot know what the source is\n   *                but know that the source will change.\n   */\n\n  /**\n   * Retrigger the `sourceset` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#sourceset\n   * @listens Tech#sourceset\n   * @private\n   */\n  ;\n\n  _proto.handleTechSourceset_ = function handleTechSourceset_(event) {\n    var _this7 = this;\n\n    // only update the source cache when the source\n    // was not updated using the player api\n    if (!this.changingSrc_) {\n      var updateSourceCaches = function updateSourceCaches(src) {\n        return _this7.updateSourceCaches_(src);\n      };\n\n      var playerSrc = this.currentSource().src;\n      var eventSrc = event.src; // if we have a playerSrc that is not a blob, and a tech src that is a blob\n\n      if (playerSrc && !/^blob:/.test(playerSrc) && /^blob:/.test(eventSrc)) {\n        // if both the tech source and the player source were updated we assume\n        // something like @videojs/http-streaming did the sourceset and skip updating the source cache.\n        if (!this.lastSource_ || this.lastSource_.tech !== eventSrc && this.lastSource_.player !== playerSrc) {\n          updateSourceCaches = function updateSourceCaches() {};\n        }\n      } // update the source to the initial source right away\n      // in some cases this will be empty string\n\n\n      updateSourceCaches(eventSrc); // if the `sourceset` `src` was an empty string\n      // wait for a `loadstart` to update the cache to `currentSrc`.\n      // If a sourceset happens before a `loadstart`, we reset the state\n\n      if (!event.src) {\n        this.tech_.any(['sourceset', 'loadstart'], function (e) {\n          // if a sourceset happens before a `loadstart` there\n          // is nothing to do as this `handleTechSourceset_`\n          // will be called again and this will be handled there.\n          if (e.type === 'sourceset') {\n            return;\n          }\n\n          var techSrc = _this7.techGet('currentSrc');\n\n          _this7.lastSource_.tech = techSrc;\n\n          _this7.updateSourceCaches_(techSrc);\n        });\n      }\n    }\n\n    this.lastSource_ = {\n      player: this.currentSource().src,\n      tech: event.src\n    };\n    this.trigger({\n      src: event.src,\n      type: 'sourceset'\n    });\n  }\n  /**\n   * Add/remove the vjs-has-started class\n   *\n   * @fires Player#firstplay\n   *\n   * @param {boolean} request\n   *        - true: adds the class\n   *        - false: remove the class\n   *\n   * @return {boolean}\n   *         the boolean value of hasStarted_\n   */\n  ;\n\n  _proto.hasStarted = function hasStarted(request) {\n    if (request === undefined) {\n      // act as getter, if we have no request to change\n      return this.hasStarted_;\n    }\n\n    if (request === this.hasStarted_) {\n      return;\n    }\n\n    this.hasStarted_ = request;\n\n    if (this.hasStarted_) {\n      this.addClass('vjs-has-started');\n      this.trigger('firstplay');\n    } else {\n      this.removeClass('vjs-has-started');\n    }\n  }\n  /**\n   * Fired whenever the media begins or resumes playback\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play}\n   * @fires Player#play\n   * @listens Tech#play\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlay_ = function handleTechPlay_() {\n    this.removeClass('vjs-ended');\n    this.removeClass('vjs-paused');\n    this.addClass('vjs-playing'); // hide the poster when the user hits play\n\n    this.hasStarted(true);\n    /**\n     * Triggered whenever an {@link Tech#play} event happens. Indicates that\n     * playback has started or resumed.\n     *\n     * @event Player#play\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('play');\n  }\n  /**\n   * Retrigger the `ratechange` event that was triggered by the {@link Tech}.\n   *\n   * If there were any events queued while the playback rate was zero, fire\n   * those events now.\n   *\n   * @private\n   * @method Player#handleTechRateChange_\n   * @fires Player#ratechange\n   * @listens Tech#ratechange\n   */\n  ;\n\n  _proto.handleTechRateChange_ = function handleTechRateChange_() {\n    if (this.tech_.playbackRate() > 0 && this.cache_.lastPlaybackRate === 0) {\n      this.queuedCallbacks_.forEach(function (queued) {\n        return queued.callback(queued.event);\n      });\n      this.queuedCallbacks_ = [];\n    }\n\n    this.cache_.lastPlaybackRate = this.tech_.playbackRate();\n    /**\n     * Fires when the playing speed of the audio/video is changed\n     *\n     * @event Player#ratechange\n     * @type {event}\n     */\n\n    this.trigger('ratechange');\n  }\n  /**\n   * Retrigger the `waiting` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#waiting\n   * @listens Tech#waiting\n   * @private\n   */\n  ;\n\n  _proto.handleTechWaiting_ = function handleTechWaiting_() {\n    var _this8 = this;\n\n    this.addClass('vjs-waiting');\n    /**\n     * A readyState change on the DOM element has caused playback to stop.\n     *\n     * @event Player#waiting\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('waiting'); // Browsers may emit a timeupdate event after a waiting event. In order to prevent\n    // premature removal of the waiting class, wait for the time to change.\n\n    var timeWhenWaiting = this.currentTime();\n\n    var timeUpdateListener = function timeUpdateListener() {\n      if (timeWhenWaiting !== _this8.currentTime()) {\n        _this8.removeClass('vjs-waiting');\n\n        _this8.off('timeupdate', timeUpdateListener);\n      }\n    };\n\n    this.on('timeupdate', timeUpdateListener);\n  }\n  /**\n   * Retrigger the `canplay` event that was triggered by the {@link Tech}.\n   * > Note: This is not consistent between browsers. See #1351\n   *\n   * @fires Player#canplay\n   * @listens Tech#canplay\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlay_ = function handleTechCanPlay_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_FUTURE_DATA or greater.\n     *\n     * @event Player#canplay\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplay');\n  }\n  /**\n   * Retrigger the `canplaythrough` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#canplaythrough\n   * @listens Tech#canplaythrough\n   * @private\n   */\n  ;\n\n  _proto.handleTechCanPlayThrough_ = function handleTechCanPlayThrough_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media has a readyState of HAVE_ENOUGH_DATA or greater. This means that the\n     * entire media file can be played without buffering.\n     *\n     * @event Player#canplaythrough\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('canplaythrough');\n  }\n  /**\n   * Retrigger the `playing` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#playing\n   * @listens Tech#playing\n   * @private\n   */\n  ;\n\n  _proto.handleTechPlaying_ = function handleTechPlaying_() {\n    this.removeClass('vjs-waiting');\n    /**\n     * The media is no longer blocked from playback, and has started playing.\n     *\n     * @event Player#playing\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('playing');\n  }\n  /**\n   * Retrigger the `seeking` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeking\n   * @listens Tech#seeking\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeking_ = function handleTechSeeking_() {\n    this.addClass('vjs-seeking');\n    /**\n     * Fired whenever the player is jumping to a new time\n     *\n     * @event Player#seeking\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeking');\n  }\n  /**\n   * Retrigger the `seeked` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#seeked\n   * @listens Tech#seeked\n   * @private\n   */\n  ;\n\n  _proto.handleTechSeeked_ = function handleTechSeeked_() {\n    this.removeClass('vjs-seeking');\n    this.removeClass('vjs-ended');\n    /**\n     * Fired when the player has finished jumping to a new time\n     *\n     * @event Player#seeked\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('seeked');\n  }\n  /**\n   * Retrigger the `firstplay` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#firstplay\n   * @listens Tech#firstplay\n   * @deprecated As of 6.0 firstplay event is deprecated.\n   *             As of 6.0 passing the `starttime` option to the player and the firstplay event are deprecated.\n   * @private\n   */\n  ;\n\n  _proto.handleTechFirstPlay_ = function handleTechFirstPlay_() {\n    // If the first starttime attribute is specified\n    // then we will start at the given offset in seconds\n    if (this.options_.starttime) {\n      log$1.warn('Passing the `starttime` option to the player will be deprecated in 6.0');\n      this.currentTime(this.options_.starttime);\n    }\n\n    this.addClass('vjs-has-started');\n    /**\n     * Fired the first time a video is played. Not part of the HLS spec, and this is\n     * probably not the best implementation yet, so use sparingly. If you don't have a\n     * reason to prevent playback, use `myPlayer.one('play');` instead.\n     *\n     * @event Player#firstplay\n     * @deprecated As of 6.0 firstplay event is deprecated.\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('firstplay');\n  }\n  /**\n   * Retrigger the `pause` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#pause\n   * @listens Tech#pause\n   * @private\n   */\n  ;\n\n  _proto.handleTechPause_ = function handleTechPause_() {\n    this.removeClass('vjs-playing');\n    this.addClass('vjs-paused');\n    /**\n     * Fired whenever the media has been paused\n     *\n     * @event Player#pause\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('pause');\n  }\n  /**\n   * Retrigger the `ended` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#ended\n   * @listens Tech#ended\n   * @private\n   */\n  ;\n\n  _proto.handleTechEnded_ = function handleTechEnded_() {\n    this.addClass('vjs-ended');\n    this.removeClass('vjs-waiting');\n\n    if (this.options_.loop) {\n      this.currentTime(0);\n      this.play();\n    } else if (!this.paused()) {\n      this.pause();\n    }\n    /**\n     * Fired when the end of the media resource is reached (currentTime == duration)\n     *\n     * @event Player#ended\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('ended');\n  }\n  /**\n   * Fired when the duration of the media resource is first known or changed\n   *\n   * @listens Tech#durationchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechDurationChange_ = function handleTechDurationChange_() {\n    this.duration(this.techGet_('duration'));\n  }\n  /**\n   * Handle a click on the media element to play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#click\n   * @private\n   */\n  ;\n\n  _proto.handleTechClick_ = function handleTechClick_(event) {\n    // When controls are disabled a click should not toggle playback because\n    // the click is considered a control\n    if (!this.controls_) {\n      return;\n    }\n\n    if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.click === undefined || this.options_.userActions.click !== false) {\n      if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.click === 'function') {\n        this.options_.userActions.click.call(this, event);\n      } else if (this.paused()) {\n        silencePromise(this.play());\n      } else {\n        this.pause();\n      }\n    }\n  }\n  /**\n   * Handle a double-click on the media element to enter/exit fullscreen\n   *\n   * @param {EventTarget~Event} event\n   *        the event that caused this function to trigger\n   *\n   * @listens Tech#dblclick\n   * @private\n   */\n  ;\n\n  _proto.handleTechDoubleClick_ = function handleTechDoubleClick_(event) {\n    if (!this.controls_) {\n      return;\n    } // we do not want to toggle fullscreen state\n    // when double-clicking inside a control bar or a modal\n\n\n    var inAllowedEls = Array.prototype.some.call(this.$$('.vjs-control-bar, .vjs-modal-dialog'), function (el) {\n      return el.contains(event.target);\n    });\n\n    if (!inAllowedEls) {\n      /*\n       * options.userActions.doubleClick\n       *\n       * If `undefined` or `true`, double-click toggles fullscreen if controls are present\n       * Set to `false` to disable double-click handling\n       * Set to a function to substitute an external double-click handler\n       */\n      if (this.options_ === undefined || this.options_.userActions === undefined || this.options_.userActions.doubleClick === undefined || this.options_.userActions.doubleClick !== false) {\n        if (this.options_ !== undefined && this.options_.userActions !== undefined && typeof this.options_.userActions.doubleClick === 'function') {\n          this.options_.userActions.doubleClick.call(this, event);\n        } else if (this.isFullscreen()) {\n          this.exitFullscreen();\n        } else {\n          this.requestFullscreen();\n        }\n      }\n    }\n  }\n  /**\n   * Handle a tap on the media element. It will toggle the user\n   * activity state, which hides and shows the controls.\n   *\n   * @listens Tech#tap\n   * @private\n   */\n  ;\n\n  _proto.handleTechTap_ = function handleTechTap_() {\n    this.userActive(!this.userActive());\n  }\n  /**\n   * Handle touch to start\n   *\n   * @listens Tech#touchstart\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchStart_ = function handleTechTouchStart_() {\n    this.userWasActive = this.userActive();\n  }\n  /**\n   * Handle touch to move\n   *\n   * @listens Tech#touchmove\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchMove_ = function handleTechTouchMove_() {\n    if (this.userWasActive) {\n      this.reportUserActivity();\n    }\n  }\n  /**\n   * Handle touch to end\n   *\n   * @param {EventTarget~Event} event\n   *        the touchend event that triggered\n   *        this function\n   *\n   * @listens Tech#touchend\n   * @private\n   */\n  ;\n\n  _proto.handleTechTouchEnd_ = function handleTechTouchEnd_(event) {\n    // Stop the mouse events from also happening\n    if (event.cancelable) {\n      event.preventDefault();\n    }\n  }\n  /**\n   * native click events on the SWF aren't triggered on IE11, Win8.1RT\n   * use stageclick events triggered from inside the SWF instead\n   *\n   * @private\n   * @listens stageclick\n   */\n  ;\n\n  _proto.handleStageClick_ = function handleStageClick_() {\n    this.reportUserActivity();\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.toggleFullscreenClass_ = function toggleFullscreenClass_() {\n    if (this.isFullscreen()) {\n      this.addClass('vjs-fullscreen');\n    } else {\n      this.removeClass('vjs-fullscreen');\n    }\n  }\n  /**\n   * when the document fschange event triggers it calls this\n   */\n  ;\n\n  _proto.documentFullscreenChange_ = function documentFullscreenChange_(e) {\n    var targetPlayer = e.target.player; // if another player was fullscreen\n    // do a null check for targetPlayer because older firefox's would put document as e.target\n\n    if (targetPlayer && targetPlayer !== this) {\n      return;\n    }\n\n    var el = this.el();\n    var isFs = document[this.fsApi_.fullscreenElement] === el;\n\n    if (!isFs && el.matches) {\n      isFs = el.matches(':' + this.fsApi_.fullscreen);\n    } else if (!isFs && el.msMatchesSelector) {\n      isFs = el.msMatchesSelector(':' + this.fsApi_.fullscreen);\n    }\n\n    this.isFullscreen(isFs);\n  }\n  /**\n   * Handle Tech Fullscreen Change\n   *\n   * @param {EventTarget~Event} event\n   *        the fullscreenchange event that triggered this function\n   *\n   * @param {Object} data\n   *        the data that was sent with the event\n   *\n   * @private\n   * @listens Tech#fullscreenchange\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.handleTechFullscreenChange_ = function handleTechFullscreenChange_(event, data) {\n    var _this9 = this;\n\n    if (data) {\n      if (data.nativeIOSFullscreen) {\n        this.addClass('vjs-ios-native-fs');\n        this.tech_.one('webkitendfullscreen', function () {\n          _this9.removeClass('vjs-ios-native-fs');\n        });\n      }\n\n      this.isFullscreen(data.isFullscreen);\n    }\n  };\n\n  _proto.handleTechFullscreenError_ = function handleTechFullscreenError_(event, err) {\n    this.trigger('fullscreenerror', err);\n  }\n  /**\n   * @private\n   */\n  ;\n\n  _proto.togglePictureInPictureClass_ = function togglePictureInPictureClass_() {\n    if (this.isInPictureInPicture()) {\n      this.addClass('vjs-picture-in-picture');\n    } else {\n      this.removeClass('vjs-picture-in-picture');\n    }\n  }\n  /**\n   * Handle Tech Enter Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the enterpictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#enterpictureinpicture\n   */\n  ;\n\n  _proto.handleTechEnterPictureInPicture_ = function handleTechEnterPictureInPicture_(event) {\n    this.isInPictureInPicture(true);\n  }\n  /**\n   * Handle Tech Leave Picture-in-Picture.\n   *\n   * @param {EventTarget~Event} event\n   *        the leavepictureinpicture event that triggered this function\n   *\n   * @private\n   * @listens Tech#leavepictureinpicture\n   */\n  ;\n\n  _proto.handleTechLeavePictureInPicture_ = function handleTechLeavePictureInPicture_(event) {\n    this.isInPictureInPicture(false);\n  }\n  /**\n   * Fires when an error occurred during the loading of an audio/video.\n   *\n   * @private\n   * @listens Tech#error\n   */\n  ;\n\n  _proto.handleTechError_ = function handleTechError_() {\n    var error = this.tech_.error();\n    this.error(error);\n  }\n  /**\n   * Retrigger the `textdata` event that was triggered by the {@link Tech}.\n   *\n   * @fires Player#textdata\n   * @listens Tech#textdata\n   * @private\n   */\n  ;\n\n  _proto.handleTechTextData_ = function handleTechTextData_() {\n    var data = null;\n\n    if (arguments.length > 1) {\n      data = arguments[1];\n    }\n    /**\n     * Fires when we get a textdata event from tech\n     *\n     * @event Player#textdata\n     * @type {EventTarget~Event}\n     */\n\n\n    this.trigger('textdata', data);\n  }\n  /**\n   * Get object for cached values.\n   *\n   * @return {Object}\n   *         get the current object cache\n   */\n  ;\n\n  _proto.getCache = function getCache() {\n    return this.cache_;\n  }\n  /**\n   * Resets the internal cache object.\n   *\n   * Using this function outside the player constructor or reset method may\n   * have unintended side-effects.\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetCache_ = function resetCache_() {\n    this.cache_ = {\n      // Right now, the currentTime is not _really_ cached because it is always\n      // retrieved from the tech (see: currentTime). However, for completeness,\n      // we set it to zero here to ensure that if we do start actually caching\n      // it, we reset it along with everything else.\n      currentTime: 0,\n      initTime: 0,\n      inactivityTimeout: this.options_.inactivityTimeout,\n      duration: NaN,\n      lastVolume: 1,\n      lastPlaybackRate: this.defaultPlaybackRate(),\n      media: null,\n      src: '',\n      source: {},\n      sources: [],\n      playbackRates: [],\n      volume: 1\n    };\n  }\n  /**\n   * Pass values to the playback tech\n   *\n   * @param {string} [method]\n   *        the method to call\n   *\n   * @param {Object} arg\n   *        the argument to pass\n   *\n   * @private\n   */\n  ;\n\n  _proto.techCall_ = function techCall_(method, arg) {\n    // If it's not ready yet, call method when it is\n    this.ready(function () {\n      if (method in allowedSetters) {\n        return set(this.middleware_, this.tech_, method, arg);\n      } else if (method in allowedMediators) {\n        return mediate(this.middleware_, this.tech_, method, arg);\n      }\n\n      try {\n        if (this.tech_) {\n          this.tech_[method](arg);\n        }\n      } catch (e) {\n        log$1(e);\n        throw e;\n      }\n    }, true);\n  }\n  /**\n   * Get calls can't wait for the tech, and sometimes don't need to.\n   *\n   * @param {string} method\n   *        Tech method\n   *\n   * @return {Function|undefined}\n   *         the method or undefined\n   *\n   * @private\n   */\n  ;\n\n  _proto.techGet_ = function techGet_(method) {\n    if (!this.tech_ || !this.tech_.isReady_) {\n      return;\n    }\n\n    if (method in allowedGetters) {\n      return get(this.middleware_, this.tech_, method);\n    } else if (method in allowedMediators) {\n      return mediate(this.middleware_, this.tech_, method);\n    } // Flash likes to die and reload when you hide or reposition it.\n    // In these cases the object methods go away and we get errors.\n    // TODO: Is this needed for techs other than Flash?\n    // When that happens we'll catch the errors and inform tech that it's not ready any more.\n\n\n    try {\n      return this.tech_[method]();\n    } catch (e) {\n      // When building additional tech libs, an expected method may not be defined yet\n      if (this.tech_[method] === undefined) {\n        log$1(\"Video.js: \" + method + \" method not defined for \" + this.techName_ + \" playback technology.\", e);\n        throw e;\n      } // When a method isn't available on the object it throws a TypeError\n\n\n      if (e.name === 'TypeError') {\n        log$1(\"Video.js: \" + method + \" unavailable on \" + this.techName_ + \" playback technology element.\", e);\n        this.tech_.isReady_ = false;\n        throw e;\n      } // If error unknown, just log and throw\n\n\n      log$1(e);\n      throw e;\n    }\n  }\n  /**\n   * Attempt to begin playback at the first opportunity.\n   *\n   * @return {Promise|undefined}\n   *         Returns a promise if the browser supports Promises (or one\n   *         was passed in as an option). This promise will be resolved on\n   *         the return value of play. If this is undefined it will fulfill the\n   *         promise chain otherwise the promise chain will be fulfilled when\n   *         the promise from play is fulfilled.\n   */\n  ;\n\n  _proto.play = function play() {\n    var _this10 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      return new PromiseClass(function (resolve) {\n        _this10.play_(resolve);\n      });\n    }\n\n    return this.play_();\n  }\n  /**\n   * The actual logic for play, takes a callback that will be resolved on the\n   * return value of play. This allows us to resolve to the play promise if there\n   * is one on modern browsers.\n   *\n   * @private\n   * @param {Function} [callback]\n   *        The callback that should be called when the techs play is actually called\n   */\n  ;\n\n  _proto.play_ = function play_(callback) {\n    var _this11 = this;\n\n    if (callback === void 0) {\n      callback = silencePromise;\n    }\n\n    this.playCallbacks_.push(callback);\n    var isSrcReady = Boolean(!this.changingSrc_ && (this.src() || this.currentSrc()));\n    var isSafariOrIOS = Boolean(IS_ANY_SAFARI || IS_IOS); // treat calls to play_ somewhat like the `one` event function\n\n    if (this.waitToPlay_) {\n      this.off(['ready', 'loadstart'], this.waitToPlay_);\n      this.waitToPlay_ = null;\n    } // if the player/tech is not ready or the src itself is not ready\n    // queue up a call to play on `ready` or `loadstart`\n\n\n    if (!this.isReady_ || !isSrcReady) {\n      this.waitToPlay_ = function (e) {\n        _this11.play_();\n      };\n\n      this.one(['ready', 'loadstart'], this.waitToPlay_); // if we are in Safari, there is a high chance that loadstart will trigger after the gesture timeperiod\n      // in that case, we need to prime the video element by calling load so it'll be ready in time\n\n      if (!isSrcReady && isSafariOrIOS) {\n        this.load();\n      }\n\n      return;\n    } // If the player/tech is ready and we have a source, we can attempt playback.\n\n\n    var val = this.techGet_('play'); // For native playback, reset the progress bar if we get a play call from a replay.\n\n    var isNativeReplay = isSafariOrIOS && this.hasClass('vjs-ended');\n\n    if (isNativeReplay) {\n      this.resetProgressBar_();\n    } // play was terminated if the returned value is null\n\n\n    if (val === null) {\n      this.runPlayTerminatedQueue_();\n    } else {\n      this.runPlayCallbacks_(val);\n    }\n  }\n  /**\n   * These functions will be run when if play is terminated. If play\n   * runPlayCallbacks_ is run these function will not be run. This allows us\n   * to differenciate between a terminated play and an actual call to play.\n   */\n  ;\n\n  _proto.runPlayTerminatedQueue_ = function runPlayTerminatedQueue_() {\n    var queue = this.playTerminatedQueue_.slice(0);\n    this.playTerminatedQueue_ = [];\n    queue.forEach(function (q) {\n      q();\n    });\n  }\n  /**\n   * When a callback to play is delayed we have to run these\n   * callbacks when play is actually called on the tech. This function\n   * runs the callbacks that were delayed and accepts the return value\n   * from the tech.\n   *\n   * @param {undefined|Promise} val\n   *        The return value from the tech.\n   */\n  ;\n\n  _proto.runPlayCallbacks_ = function runPlayCallbacks_(val) {\n    var callbacks = this.playCallbacks_.slice(0);\n    this.playCallbacks_ = []; // clear play terminatedQueue since we finished a real play\n\n    this.playTerminatedQueue_ = [];\n    callbacks.forEach(function (cb) {\n      cb(val);\n    });\n  }\n  /**\n   * Pause the video playback\n   *\n   * @return {Player}\n   *         A reference to the player object this function was called on\n   */\n  ;\n\n  _proto.pause = function pause() {\n    this.techCall_('pause');\n  }\n  /**\n   * Check if the player is paused or has yet to play\n   *\n   * @return {boolean}\n   *         - false: if the media is currently playing\n   *         - true: if media is not currently playing\n   */\n  ;\n\n  _proto.paused = function paused() {\n    // The initial state of paused should be true (in Safari it's actually false)\n    return this.techGet_('paused') === false ? false : true;\n  }\n  /**\n   * Get a TimeRange object representing the current ranges of time that the user\n   * has played.\n   *\n   * @return {TimeRange}\n   *         A time range object that represents all the increments of time that have\n   *         been played.\n   */\n  ;\n\n  _proto.played = function played() {\n    return this.techGet_('played') || createTimeRanges(0, 0);\n  }\n  /**\n   * Returns whether or not the user is \"scrubbing\". Scrubbing is\n   * when the user has clicked the progress bar handle and is\n   * dragging it along the progress bar.\n   *\n   * @param {boolean} [isScrubbing]\n   *        whether the user is or is not scrubbing\n   *\n   * @return {boolean}\n   *         The value of scrubbing when getting\n   */\n  ;\n\n  _proto.scrubbing = function scrubbing(isScrubbing) {\n    if (typeof isScrubbing === 'undefined') {\n      return this.scrubbing_;\n    }\n\n    this.scrubbing_ = !!isScrubbing;\n    this.techCall_('setScrubbing', this.scrubbing_);\n\n    if (isScrubbing) {\n      this.addClass('vjs-scrubbing');\n    } else {\n      this.removeClass('vjs-scrubbing');\n    }\n  }\n  /**\n   * Get or set the current time (in seconds)\n   *\n   * @param {number|string} [seconds]\n   *        The time to seek to in seconds\n   *\n   * @return {number}\n   *         - the current time in seconds when getting\n   */\n  ;\n\n  _proto.currentTime = function currentTime(seconds) {\n    if (typeof seconds !== 'undefined') {\n      if (seconds < 0) {\n        seconds = 0;\n      }\n\n      if (!this.isReady_ || this.changingSrc_ || !this.tech_ || !this.tech_.isReady_) {\n        this.cache_.initTime = seconds;\n        this.off('canplay', this.boundApplyInitTime_);\n        this.one('canplay', this.boundApplyInitTime_);\n        return;\n      }\n\n      this.techCall_('setCurrentTime', seconds);\n      this.cache_.initTime = 0;\n      return;\n    } // cache last currentTime and return. default to 0 seconds\n    //\n    // Caching the currentTime is meant to prevent a massive amount of reads on the tech's\n    // currentTime when scrubbing, but may not provide much performance benefit afterall.\n    // Should be tested. Also something has to read the actual current time or the cache will\n    // never get updated.\n\n\n    this.cache_.currentTime = this.techGet_('currentTime') || 0;\n    return this.cache_.currentTime;\n  }\n  /**\n   * Apply the value of initTime stored in cache as currentTime.\n   *\n   * @private\n   */\n  ;\n\n  _proto.applyInitTime_ = function applyInitTime_() {\n    this.currentTime(this.cache_.initTime);\n  }\n  /**\n   * Normally gets the length in time of the video in seconds;\n   * in all but the rarest use cases an argument will NOT be passed to the method\n   *\n   * > **NOTE**: The video must have started loading before the duration can be\n   * known, and depending on preload behaviour may not be known until the video starts\n   * playing.\n   *\n   * @fires Player#durationchange\n   *\n   * @param {number} [seconds]\n   *        The duration of the video to set in seconds\n   *\n   * @return {number}\n   *         - The duration of the video in seconds when getting\n   */\n  ;\n\n  _proto.duration = function duration(seconds) {\n    if (seconds === undefined) {\n      // return NaN if the duration is not known\n      return this.cache_.duration !== undefined ? this.cache_.duration : NaN;\n    }\n\n    seconds = parseFloat(seconds); // Standardize on Infinity for signaling video is live\n\n    if (seconds < 0) {\n      seconds = Infinity;\n    }\n\n    if (seconds !== this.cache_.duration) {\n      // Cache the last set value for optimized scrubbing (esp. Flash)\n      // TODO: Required for techs other than Flash?\n      this.cache_.duration = seconds;\n\n      if (seconds === Infinity) {\n        this.addClass('vjs-live');\n      } else {\n        this.removeClass('vjs-live');\n      }\n\n      if (!isNaN(seconds)) {\n        // Do not fire durationchange unless the duration value is known.\n        // @see [Spec]{@link https://www.w3.org/TR/2011/WD-html5-20110113/video.html#media-element-load-algorithm}\n\n        /**\n         * @event Player#durationchange\n         * @type {EventTarget~Event}\n         */\n        this.trigger('durationchange');\n      }\n    }\n  }\n  /**\n   * Calculates how much time is left in the video. Not part\n   * of the native video API.\n   *\n   * @return {number}\n   *         The time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTime = function remainingTime() {\n    return this.duration() - this.currentTime();\n  }\n  /**\n   * A remaining time function that is intented to be used when\n   * the time is to be displayed directly to the user.\n   *\n   * @return {number}\n   *         The rounded time remaining in seconds\n   */\n  ;\n\n  _proto.remainingTimeDisplay = function remainingTimeDisplay() {\n    return Math.floor(this.duration()) - Math.floor(this.currentTime());\n  } //\n  // Kind of like an array of portions of the video that have been downloaded.\n\n  /**\n   * Get a TimeRange object with an array of the times of the video\n   * that have been downloaded. If you just want the percent of the\n   * video that's been downloaded, use bufferedPercent.\n   *\n   * @see [Buffered Spec]{@link http://dev.w3.org/html5/spec/video.html#dom-media-buffered}\n   *\n   * @return {TimeRange}\n   *         A mock TimeRange object (following HTML spec)\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var buffered = this.techGet_('buffered');\n\n    if (!buffered || !buffered.length) {\n      buffered = createTimeRanges(0, 0);\n    }\n\n    return buffered;\n  }\n  /**\n   * Get the percent (as a decimal) of the video that's been downloaded.\n   * This method is not a part of the native HTML video API.\n   *\n   * @return {number}\n   *         A decimal between 0 and 1 representing the percent\n   *         that is buffered 0 being 0% and 1 being 100%\n   */\n  ;\n\n  _proto.bufferedPercent = function bufferedPercent$1() {\n    return bufferedPercent(this.buffered(), this.duration());\n  }\n  /**\n   * Get the ending time of the last buffered time range\n   * This is used in the progress bar to encapsulate all time ranges.\n   *\n   * @return {number}\n   *         The end of the last buffered time range\n   */\n  ;\n\n  _proto.bufferedEnd = function bufferedEnd() {\n    var buffered = this.buffered();\n    var duration = this.duration();\n    var end = buffered.end(buffered.length - 1);\n\n    if (end > duration) {\n      end = duration;\n    }\n\n    return end;\n  }\n  /**\n   * Get or set the current volume of the media\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         The current volume as a percent when getting\n   */\n  ;\n\n  _proto.volume = function volume(percentAsDecimal) {\n    var vol;\n\n    if (percentAsDecimal !== undefined) {\n      // Force value to between 0 and 1\n      vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal)));\n      this.cache_.volume = vol;\n      this.techCall_('setVolume', vol);\n\n      if (vol > 0) {\n        this.lastVolume_(vol);\n      }\n\n      return;\n    } // Default to 1 when returning current volume.\n\n\n    vol = parseFloat(this.techGet_('volume'));\n    return isNaN(vol) ? 1 : vol;\n  }\n  /**\n   * Get the current muted state, or turn mute on or off\n   *\n   * @param {boolean} [muted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean}\n   *         - true if mute is on and getting\n   *         - false if mute is off and getting\n   */\n  ;\n\n  _proto.muted = function muted(_muted) {\n    if (_muted !== undefined) {\n      this.techCall_('setMuted', _muted);\n      return;\n    }\n\n    return this.techGet_('muted') || false;\n  }\n  /**\n   * Get the current defaultMuted state, or turn defaultMuted on or off. defaultMuted\n   * indicates the state of muted on initial playback.\n   *\n   * ```js\n   *   var myPlayer = videojs('some-player-id');\n   *\n   *   myPlayer.src(\"http://www.example.com/path/to/video.mp4\");\n   *\n   *   // get, should be false\n   *   console.log(myPlayer.defaultMuted());\n   *   // set to true\n   *   myPlayer.defaultMuted(true);\n   *   // get should be true\n   *   console.log(myPlayer.defaultMuted());\n   * ```\n   *\n   * @param {boolean} [defaultMuted]\n   *        - true to mute\n   *        - false to unmute\n   *\n   * @return {boolean|Player}\n   *         - true if defaultMuted is on and getting\n   *         - false if defaultMuted is off and getting\n   *         - A reference to the current player when setting\n   */\n  ;\n\n  _proto.defaultMuted = function defaultMuted(_defaultMuted) {\n    if (_defaultMuted !== undefined) {\n      return this.techCall_('setDefaultMuted', _defaultMuted);\n    }\n\n    return this.techGet_('defaultMuted') || false;\n  }\n  /**\n   * Get the last volume, or set it\n   *\n   * @param  {number} [percentAsDecimal]\n   *         The new last volume as a decimal percent:\n   *         - 0 is muted/0%/off\n   *         - 1.0 is 100%/full\n   *         - 0.5 is half volume or 50%\n   *\n   * @return {number}\n   *         the current value of lastVolume as a percent when getting\n   *\n   * @private\n   */\n  ;\n\n  _proto.lastVolume_ = function lastVolume_(percentAsDecimal) {\n    if (percentAsDecimal !== undefined && percentAsDecimal !== 0) {\n      this.cache_.lastVolume = percentAsDecimal;\n      return;\n    }\n\n    return this.cache_.lastVolume;\n  }\n  /**\n   * Check if current tech can support native fullscreen\n   * (e.g. with built in controls like iOS)\n   *\n   * @return {boolean}\n   *         if native fullscreen is supported\n   */\n  ;\n\n  _proto.supportsFullScreen = function supportsFullScreen() {\n    return this.techGet_('supportsFullScreen') || false;\n  }\n  /**\n   * Check if the player is in fullscreen mode or tell the player that it\n   * is or is not in fullscreen mode.\n   *\n   * > NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official\n   * property and instead document.fullscreenElement is used. But isFullscreen is\n   * still a valuable property for internal player workings.\n   *\n   * @param  {boolean} [isFS]\n   *         Set the players current fullscreen state\n   *\n   * @return {boolean}\n   *         - true if fullscreen is on and getting\n   *         - false if fullscreen is off and getting\n   */\n  ;\n\n  _proto.isFullscreen = function isFullscreen(isFS) {\n    if (isFS !== undefined) {\n      var oldValue = this.isFullscreen_;\n      this.isFullscreen_ = Boolean(isFS); // if we changed fullscreen state and we're in prefixed mode, trigger fullscreenchange\n      // this is the only place where we trigger fullscreenchange events for older browsers\n      // fullWindow mode is treated as a prefixed event and will get a fullscreenchange event as well\n\n      if (this.isFullscreen_ !== oldValue && this.fsApi_.prefixed) {\n        /**\n           * @event Player#fullscreenchange\n           * @type {EventTarget~Event}\n           */\n        this.trigger('fullscreenchange');\n      }\n\n      this.toggleFullscreenClass_();\n      return;\n    }\n\n    return this.isFullscreen_;\n  }\n  /**\n   * Increase the size of the video to full screen\n   * In some browsers, full screen is not supported natively, so it enters\n   * \"full window mode\", where the video fills the browser window.\n   * In browsers and devices that support native full screen, sometimes the\n   * browser's default controls will be shown, and not the Video.js custom skin.\n   * This includes most mobile devices (iOS, Android) and older versions of\n   * Safari.\n   *\n   * @param  {Object} [fullscreenOptions]\n   *         Override the player fullscreen options\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.requestFullscreen = function requestFullscreen(fullscreenOptions) {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      var self = this;\n      return new PromiseClass(function (resolve, reject) {\n        function offHandler() {\n          self.off('fullscreenerror', errorHandler);\n          self.off('fullscreenchange', changeHandler);\n        }\n\n        function changeHandler() {\n          offHandler();\n          resolve();\n        }\n\n        function errorHandler(e, err) {\n          offHandler();\n          reject(err);\n        }\n\n        self.one('fullscreenchange', changeHandler);\n        self.one('fullscreenerror', errorHandler);\n        var promise = self.requestFullscreenHelper_(fullscreenOptions);\n\n        if (promise) {\n          promise.then(offHandler, offHandler);\n          promise.then(resolve, reject);\n        }\n      });\n    }\n\n    return this.requestFullscreenHelper_();\n  };\n\n  _proto.requestFullscreenHelper_ = function requestFullscreenHelper_(fullscreenOptions) {\n    var _this12 = this;\n\n    var fsOptions; // Only pass fullscreen options to requestFullscreen in spec-compliant browsers.\n    // Use defaults or player configured option unless passed directly to this method.\n\n    if (!this.fsApi_.prefixed) {\n      fsOptions = this.options_.fullscreen && this.options_.fullscreen.options || {};\n\n      if (fullscreenOptions !== undefined) {\n        fsOptions = fullscreenOptions;\n      }\n    } // This method works as follows:\n    // 1. if a fullscreen api is available, use it\n    //   1. call requestFullscreen with potential options\n    //   2. if we got a promise from above, use it to update isFullscreen()\n    // 2. otherwise, if the tech supports fullscreen, call `enterFullScreen` on it.\n    //   This is particularly used for iPhone, older iPads, and non-safari browser on iOS.\n    // 3. otherwise, use \"fullWindow\" mode\n\n\n    if (this.fsApi_.requestFullscreen) {\n      var promise = this.el_[this.fsApi_.requestFullscreen](fsOptions);\n\n      if (promise) {\n        promise.then(function () {\n          return _this12.isFullscreen(true);\n        }, function () {\n          return _this12.isFullscreen(false);\n        });\n      }\n\n      return promise;\n    } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n      // we can't take the video.js controls fullscreen but we can go fullscreen\n      // with native controls\n      this.techCall_('enterFullScreen');\n    } else {\n      // fullscreen isn't supported so we'll just stretch the video element to\n      // fill the viewport\n      this.enterFullWindow();\n    }\n  }\n  /**\n   * Return the video to its normal size after having been in full screen mode\n   *\n   * @fires Player#fullscreenchange\n   */\n  ;\n\n  _proto.exitFullscreen = function exitFullscreen() {\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      var self = this;\n      return new PromiseClass(function (resolve, reject) {\n        function offHandler() {\n          self.off('fullscreenerror', errorHandler);\n          self.off('fullscreenchange', changeHandler);\n        }\n\n        function changeHandler() {\n          offHandler();\n          resolve();\n        }\n\n        function errorHandler(e, err) {\n          offHandler();\n          reject(err);\n        }\n\n        self.one('fullscreenchange', changeHandler);\n        self.one('fullscreenerror', errorHandler);\n        var promise = self.exitFullscreenHelper_();\n\n        if (promise) {\n          promise.then(offHandler, offHandler); // map the promise to our resolve/reject methods\n\n          promise.then(resolve, reject);\n        }\n      });\n    }\n\n    return this.exitFullscreenHelper_();\n  };\n\n  _proto.exitFullscreenHelper_ = function exitFullscreenHelper_() {\n    var _this13 = this;\n\n    if (this.fsApi_.requestFullscreen) {\n      var promise = document[this.fsApi_.exitFullscreen]();\n\n      if (promise) {\n        // we're splitting the promise here, so, we want to catch the\n        // potential error so that this chain doesn't have unhandled errors\n        silencePromise(promise.then(function () {\n          return _this13.isFullscreen(false);\n        }));\n      }\n\n      return promise;\n    } else if (this.tech_.supportsFullScreen() && !this.options_.preferFullWindow === true) {\n      this.techCall_('exitFullScreen');\n    } else {\n      this.exitFullWindow();\n    }\n  }\n  /**\n   * When fullscreen isn't supported we can stretch the\n   * video container to as wide as the browser will let us.\n   *\n   * @fires Player#enterFullWindow\n   */\n  ;\n\n  _proto.enterFullWindow = function enterFullWindow() {\n    this.isFullscreen(true);\n    this.isFullWindow = true; // Storing original doc overflow value to return to when fullscreen is off\n\n    this.docOrigOverflow = document.documentElement.style.overflow; // Add listener for esc key to exit fullscreen\n\n    on(document, 'keydown', this.boundFullWindowOnEscKey_); // Hide any scroll bars\n\n    document.documentElement.style.overflow = 'hidden'; // Apply fullscreen styles\n\n    addClass(document.body, 'vjs-full-window');\n    /**\n     * @event Player#enterFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('enterFullWindow');\n  }\n  /**\n   * Check for call to either exit full window or\n   * full screen on ESC key\n   *\n   * @param {string} event\n   *        Event to check for key press\n   */\n  ;\n\n  _proto.fullWindowOnEscKey = function fullWindowOnEscKey(event) {\n    if (keycode.isEventKey(event, 'Esc')) {\n      if (this.isFullscreen() === true) {\n        if (!this.isFullWindow) {\n          this.exitFullscreen();\n        } else {\n          this.exitFullWindow();\n        }\n      }\n    }\n  }\n  /**\n   * Exit full window\n   *\n   * @fires Player#exitFullWindow\n   */\n  ;\n\n  _proto.exitFullWindow = function exitFullWindow() {\n    this.isFullscreen(false);\n    this.isFullWindow = false;\n    off(document, 'keydown', this.boundFullWindowOnEscKey_); // Unhide scroll bars.\n\n    document.documentElement.style.overflow = this.docOrigOverflow; // Remove fullscreen styles\n\n    removeClass(document.body, 'vjs-full-window'); // Resize the box, controller, and poster to original sizes\n    // this.positionAll();\n\n    /**\n     * @event Player#exitFullWindow\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('exitFullWindow');\n  }\n  /**\n   * Disable Picture-in-Picture mode.\n   *\n   * @param {boolean} value\n   *                  - true will disable Picture-in-Picture mode\n   *                  - false will enable Picture-in-Picture mode\n   */\n  ;\n\n  _proto.disablePictureInPicture = function disablePictureInPicture(value) {\n    if (value === undefined) {\n      return this.techGet_('disablePictureInPicture');\n    }\n\n    this.techCall_('setDisablePictureInPicture', value);\n    this.options_.disablePictureInPicture = value;\n    this.trigger('disablepictureinpicturechanged');\n  }\n  /**\n   * Check if the player is in Picture-in-Picture mode or tell the player that it\n   * is or is not in Picture-in-Picture mode.\n   *\n   * @param  {boolean} [isPiP]\n   *         Set the players current Picture-in-Picture state\n   *\n   * @return {boolean}\n   *         - true if Picture-in-Picture is on and getting\n   *         - false if Picture-in-Picture is off and getting\n   */\n  ;\n\n  _proto.isInPictureInPicture = function isInPictureInPicture(isPiP) {\n    if (isPiP !== undefined) {\n      this.isInPictureInPicture_ = !!isPiP;\n      this.togglePictureInPictureClass_();\n      return;\n    }\n\n    return !!this.isInPictureInPicture_;\n  }\n  /**\n   * Create a floating video window always on top of other windows so that users may\n   * continue consuming media while they interact with other content sites, or\n   * applications on their device.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#enterpictureinpicture\n   *\n   * @return {Promise}\n   *         A promise with a Picture-in-Picture window.\n   */\n  ;\n\n  _proto.requestPictureInPicture = function requestPictureInPicture() {\n    if ('pictureInPictureEnabled' in document && this.disablePictureInPicture() === false) {\n      /**\n       * This event fires when the player enters picture in picture mode\n       *\n       * @event Player#enterpictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return this.techGet_('requestPictureInPicture');\n    }\n  }\n  /**\n   * Exit Picture-in-Picture mode.\n   *\n   * @see [Spec]{@link https://wicg.github.io/picture-in-picture}\n   *\n   * @fires Player#leavepictureinpicture\n   *\n   * @return {Promise}\n   *         A promise.\n   */\n  ;\n\n  _proto.exitPictureInPicture = function exitPictureInPicture() {\n    if ('pictureInPictureEnabled' in document) {\n      /**\n       * This event fires when the player leaves picture in picture mode\n       *\n       * @event Player#leavepictureinpicture\n       * @type {EventTarget~Event}\n       */\n      return document.exitPictureInPicture();\n    }\n  }\n  /**\n   * Called when this Player has focus and a key gets pressed down, or when\n   * any Component of this player receives a key press that it doesn't handle.\n   * This allows player-wide hotkeys (either as defined below, or optionally\n   * by an external function).\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   *\n   * @listens keydown\n   */\n  ;\n\n  _proto.handleKeyDown = function handleKeyDown(event) {\n    var userActions = this.options_.userActions; // Bail out if hotkeys are not configured.\n\n    if (!userActions || !userActions.hotkeys) {\n      return;\n    } // Function that determines whether or not to exclude an element from\n    // hotkeys handling.\n\n\n    var excludeElement = function excludeElement(el) {\n      var tagName = el.tagName.toLowerCase(); // The first and easiest test is for `contenteditable` elements.\n\n      if (el.isContentEditable) {\n        return true;\n      } // Inputs matching these types will still trigger hotkey handling as\n      // they are not text inputs.\n\n\n      var allowedInputTypes = ['button', 'checkbox', 'hidden', 'radio', 'reset', 'submit'];\n\n      if (tagName === 'input') {\n        return allowedInputTypes.indexOf(el.type) === -1;\n      } // The final test is by tag name. These tags will be excluded entirely.\n\n\n      var excludedTags = ['textarea'];\n      return excludedTags.indexOf(tagName) !== -1;\n    }; // Bail out if the user is focused on an interactive form element.\n\n\n    if (excludeElement(this.el_.ownerDocument.activeElement)) {\n      return;\n    }\n\n    if (typeof userActions.hotkeys === 'function') {\n      userActions.hotkeys.call(this, event);\n    } else {\n      this.handleHotkeys(event);\n    }\n  }\n  /**\n   * Called when this Player receives a hotkey keydown event.\n   * Supported player-wide hotkeys are:\n   *\n   *   f          - toggle fullscreen\n   *   m          - toggle mute\n   *   k or Space - toggle play/pause\n   *\n   * @param {EventTarget~Event} event\n   *        The `keydown` event that caused this function to be called.\n   */\n  ;\n\n  _proto.handleHotkeys = function handleHotkeys(event) {\n    var hotkeys = this.options_.userActions ? this.options_.userActions.hotkeys : {}; // set fullscreenKey, muteKey, playPauseKey from `hotkeys`, use defaults if not set\n\n    var _hotkeys$fullscreenKe = hotkeys.fullscreenKey,\n        fullscreenKey = _hotkeys$fullscreenKe === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'f');\n    } : _hotkeys$fullscreenKe,\n        _hotkeys$muteKey = hotkeys.muteKey,\n        muteKey = _hotkeys$muteKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'm');\n    } : _hotkeys$muteKey,\n        _hotkeys$playPauseKey = hotkeys.playPauseKey,\n        playPauseKey = _hotkeys$playPauseKey === void 0 ? function (keydownEvent) {\n      return keycode.isEventKey(keydownEvent, 'k') || keycode.isEventKey(keydownEvent, 'Space');\n    } : _hotkeys$playPauseKey;\n\n    if (fullscreenKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var FSToggle = Component$1.getComponent('FullscreenToggle');\n\n      if (document[this.fsApi_.fullscreenEnabled] !== false) {\n        FSToggle.prototype.handleClick.call(this, event);\n      }\n    } else if (muteKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var MuteToggle = Component$1.getComponent('MuteToggle');\n      MuteToggle.prototype.handleClick.call(this, event);\n    } else if (playPauseKey.call(this, event)) {\n      event.preventDefault();\n      event.stopPropagation();\n      var PlayToggle = Component$1.getComponent('PlayToggle');\n      PlayToggle.prototype.handleClick.call(this, event);\n    }\n  }\n  /**\n   * Check whether the player can play a given mimetype\n   *\n   * @see https://www.w3.org/TR/2011/WD-html5-20110113/video.html#dom-navigator-canplaytype\n   *\n   * @param {string} type\n   *        The mimetype to check\n   *\n   * @return {string}\n   *         'probably', 'maybe', or '' (empty string)\n   */\n  ;\n\n  _proto.canPlayType = function canPlayType(type) {\n    var can; // Loop through each playback technology in the options order\n\n    for (var i = 0, j = this.options_.techOrder; i < j.length; i++) {\n      var techName = j[i];\n      var tech = Tech.getTech(techName); // Support old behavior of techs being registered as components.\n      // Remove once that deprecated behavior is removed.\n\n      if (!tech) {\n        tech = Component$1.getComponent(techName);\n      } // Check if the current tech is defined before continuing\n\n\n      if (!tech) {\n        log$1.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n        continue;\n      } // Check if the browser supports this technology\n\n\n      if (tech.isSupported()) {\n        can = tech.canPlayType(type);\n\n        if (can) {\n          return can;\n        }\n      }\n    }\n\n    return '';\n  }\n  /**\n   * Select source based on tech-order or source-order\n   * Uses source-order selection if `options.sourceOrder` is truthy. Otherwise,\n   * defaults to tech-order selection\n   *\n   * @param {Array} sources\n   *        The sources for a media asset\n   *\n   * @return {Object|boolean}\n   *         Object of source and tech order or false\n   */\n  ;\n\n  _proto.selectSource = function selectSource(sources) {\n    var _this14 = this;\n\n    // Get only the techs specified in `techOrder` that exist and are supported by the\n    // current platform\n    var techs = this.options_.techOrder.map(function (techName) {\n      return [techName, Tech.getTech(techName)];\n    }).filter(function (_ref) {\n      var techName = _ref[0],\n          tech = _ref[1];\n\n      // Check if the current tech is defined before continuing\n      if (tech) {\n        // Check if the browser supports this technology\n        return tech.isSupported();\n      }\n\n      log$1.error(\"The \\\"\" + techName + \"\\\" tech is undefined. Skipped browser support check for that tech.\");\n      return false;\n    }); // Iterate over each `innerArray` element once per `outerArray` element and execute\n    // `tester` with both. If `tester` returns a non-falsy value, exit early and return\n    // that value.\n\n    var findFirstPassingTechSourcePair = function findFirstPassingTechSourcePair(outerArray, innerArray, tester) {\n      var found;\n      outerArray.some(function (outerChoice) {\n        return innerArray.some(function (innerChoice) {\n          found = tester(outerChoice, innerChoice);\n\n          if (found) {\n            return true;\n          }\n        });\n      });\n      return found;\n    };\n\n    var foundSourceAndTech;\n\n    var flip = function flip(fn) {\n      return function (a, b) {\n        return fn(b, a);\n      };\n    };\n\n    var finder = function finder(_ref2, source) {\n      var techName = _ref2[0],\n          tech = _ref2[1];\n\n      if (tech.canPlaySource(source, _this14.options_[techName.toLowerCase()])) {\n        return {\n          source: source,\n          tech: techName\n        };\n      }\n    }; // Depending on the truthiness of `options.sourceOrder`, we swap the order of techs and sources\n    // to select from them based on their priority.\n\n\n    if (this.options_.sourceOrder) {\n      // Source-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(sources, techs, flip(finder));\n    } else {\n      // Tech-first ordering\n      foundSourceAndTech = findFirstPassingTechSourcePair(techs, sources, finder);\n    }\n\n    return foundSourceAndTech || false;\n  }\n  /**\n   * Executes source setting and getting logic\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   * @param {boolean} isRetry\n   *        Indicates whether this is being called internally as a result of a retry\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.handleSrc_ = function handleSrc_(source, isRetry) {\n    var _this15 = this;\n\n    // getter usage\n    if (typeof source === 'undefined') {\n      return this.cache_.src || '';\n    } // Reset retry behavior for new source\n\n\n    if (this.resetRetryOnError_) {\n      this.resetRetryOnError_();\n    } // filter out invalid sources and turn our source into\n    // an array of source objects\n\n\n    var sources = filterSource(source); // if a source was passed in then it is invalid because\n    // it was filtered to a zero length Array. So we have to\n    // show an error\n\n    if (!sources.length) {\n      this.setTimeout(function () {\n        this.error({\n          code: 4,\n          message: this.options_.notSupportedMessage\n        });\n      }, 0);\n      return;\n    } // initial sources\n\n\n    this.changingSrc_ = true; // Only update the cached source list if we are not retrying a new source after error,\n    // since in that case we want to include the failed source(s) in the cache\n\n    if (!isRetry) {\n      this.cache_.sources = sources;\n    }\n\n    this.updateSourceCaches_(sources[0]); // middlewareSource is the source after it has been changed by middleware\n\n    setSource(this, sources[0], function (middlewareSource, mws) {\n      _this15.middleware_ = mws; // since sourceSet is async we have to update the cache again after we select a source since\n      // the source that is selected could be out of order from the cache update above this callback.\n\n      if (!isRetry) {\n        _this15.cache_.sources = sources;\n      }\n\n      _this15.updateSourceCaches_(middlewareSource);\n\n      var err = _this15.src_(middlewareSource);\n\n      if (err) {\n        if (sources.length > 1) {\n          return _this15.handleSrc_(sources.slice(1));\n        }\n\n        _this15.changingSrc_ = false; // We need to wrap this in a timeout to give folks a chance to add error event handlers\n\n        _this15.setTimeout(function () {\n          this.error({\n            code: 4,\n            message: this.options_.notSupportedMessage\n          });\n        }, 0); // we could not find an appropriate tech, but let's still notify the delegate that this is it\n        // this needs a better comment about why this is needed\n\n\n        _this15.triggerReady();\n\n        return;\n      }\n\n      setTech(mws, _this15.tech_);\n    }); // Try another available source if this one fails before playback.\n\n    if (this.options_.retryOnError && sources.length > 1) {\n      var retry = function retry() {\n        // Remove the error modal\n        _this15.error(null);\n\n        _this15.handleSrc_(sources.slice(1), true);\n      };\n\n      var stopListeningForErrors = function stopListeningForErrors() {\n        _this15.off('error', retry);\n      };\n\n      this.one('error', retry);\n      this.one('playing', stopListeningForErrors);\n\n      this.resetRetryOnError_ = function () {\n        _this15.off('error', retry);\n\n        _this15.off('playing', stopListeningForErrors);\n      };\n    }\n  }\n  /**\n   * Get or set the video source.\n   *\n   * @param {Tech~SourceObject|Tech~SourceObject[]|string} [source]\n   *        A SourceObject, an array of SourceObjects, or a string referencing\n   *        a URL to a media source. It is _highly recommended_ that an object\n   *        or array of objects is used here, so that source selection\n   *        algorithms can take the `type` into account.\n   *\n   *        If not provided, this method acts as a getter.\n   *\n   * @return {string|undefined}\n   *         If the `source` argument is missing, returns the current source\n   *         URL. Otherwise, returns nothing/undefined.\n   */\n  ;\n\n  _proto.src = function src(source) {\n    return this.handleSrc_(source, false);\n  }\n  /**\n   * Set the source object on the tech, returns a boolean that indicates whether\n   * there is a tech that can play the source or not\n   *\n   * @param {Tech~SourceObject} source\n   *        The source object to set on the Tech\n   *\n   * @return {boolean}\n   *         - True if there is no Tech to playback this source\n   *         - False otherwise\n   *\n   * @private\n   */\n  ;\n\n  _proto.src_ = function src_(source) {\n    var _this16 = this;\n\n    var sourceTech = this.selectSource([source]);\n\n    if (!sourceTech) {\n      return true;\n    }\n\n    if (!titleCaseEquals(sourceTech.tech, this.techName_)) {\n      this.changingSrc_ = true; // load this technology with the chosen source\n\n      this.loadTech_(sourceTech.tech, sourceTech.source);\n      this.tech_.ready(function () {\n        _this16.changingSrc_ = false;\n      });\n      return false;\n    } // wait until the tech is ready to set the source\n    // and set it synchronously if possible (#2326)\n\n\n    this.ready(function () {\n      // The setSource tech method was added with source handlers\n      // so older techs won't support it\n      // We need to check the direct prototype for the case where subclasses\n      // of the tech do not support source handlers\n      if (this.tech_.constructor.prototype.hasOwnProperty('setSource')) {\n        this.techCall_('setSource', source);\n      } else {\n        this.techCall_('src', source.src);\n      }\n\n      this.changingSrc_ = false;\n    }, true);\n    return false;\n  }\n  /**\n   * Begin loading the src data.\n   */\n  ;\n\n  _proto.load = function load() {\n    this.techCall_('load');\n  }\n  /**\n   * Reset the player. Loads the first tech in the techOrder,\n   * removes all the text tracks in the existing `tech`,\n   * and calls `reset` on the `tech`.\n   */\n  ;\n\n  _proto.reset = function reset() {\n    var _this17 = this;\n\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (this.paused() || !PromiseClass) {\n      this.doReset_();\n    } else {\n      var playPromise = this.play();\n      silencePromise(playPromise.then(function () {\n        return _this17.doReset_();\n      }));\n    }\n  };\n\n  _proto.doReset_ = function doReset_() {\n    if (this.tech_) {\n      this.tech_.clearTracks('text');\n    }\n\n    this.resetCache_();\n    this.poster('');\n    this.loadTech_(this.options_.techOrder[0], null);\n    this.techCall_('reset');\n    this.resetControlBarUI_();\n\n    if (isEvented(this)) {\n      this.trigger('playerreset');\n    }\n  }\n  /**\n   * Reset Control Bar's UI by calling sub-methods that reset\n   * all of Control Bar's components\n   */\n  ;\n\n  _proto.resetControlBarUI_ = function resetControlBarUI_() {\n    this.resetProgressBar_();\n    this.resetPlaybackRate_();\n    this.resetVolumeBar_();\n  }\n  /**\n   * Reset tech's progress so progress bar is reset in the UI\n   */\n  ;\n\n  _proto.resetProgressBar_ = function resetProgressBar_() {\n    this.currentTime(0);\n\n    var _ref3 = this.controlBar || {},\n        durationDisplay = _ref3.durationDisplay,\n        remainingTimeDisplay = _ref3.remainingTimeDisplay;\n\n    if (durationDisplay) {\n      durationDisplay.updateContent();\n    }\n\n    if (remainingTimeDisplay) {\n      remainingTimeDisplay.updateContent();\n    }\n  }\n  /**\n   * Reset Playback ratio\n   */\n  ;\n\n  _proto.resetPlaybackRate_ = function resetPlaybackRate_() {\n    this.playbackRate(this.defaultPlaybackRate());\n    this.handleTechRateChange_();\n  }\n  /**\n   * Reset Volume bar\n   */\n  ;\n\n  _proto.resetVolumeBar_ = function resetVolumeBar_() {\n    this.volume(1.0);\n    this.trigger('volumechange');\n  }\n  /**\n   * Returns all of the current source objects.\n   *\n   * @return {Tech~SourceObject[]}\n   *         The current source objects\n   */\n  ;\n\n  _proto.currentSources = function currentSources() {\n    var source = this.currentSource();\n    var sources = []; // assume `{}` or `{ src }`\n\n    if (Object.keys(source).length !== 0) {\n      sources.push(source);\n    }\n\n    return this.cache_.sources || sources;\n  }\n  /**\n   * Returns the current source object.\n   *\n   * @return {Tech~SourceObject}\n   *         The current source object\n   */\n  ;\n\n  _proto.currentSource = function currentSource() {\n    return this.cache_.source || {};\n  }\n  /**\n   * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4\n   * Can be used in conjunction with `currentType` to assist in rebuilding the current source object.\n   *\n   * @return {string}\n   *         The current source\n   */\n  ;\n\n  _proto.currentSrc = function currentSrc() {\n    return this.currentSource() && this.currentSource().src || '';\n  }\n  /**\n   * Get the current source type e.g. video/mp4\n   * This can allow you rebuild the current source object so that you could load the same\n   * source and tech later\n   *\n   * @return {string}\n   *         The source MIME type\n   */\n  ;\n\n  _proto.currentType = function currentType() {\n    return this.currentSource() && this.currentSource().type || '';\n  }\n  /**\n   * Get or set the preload attribute\n   *\n   * @param {boolean} [value]\n   *        - true means that we should preload\n   *        - false means that we should not preload\n   *\n   * @return {string}\n   *         The preload attribute value when getting\n   */\n  ;\n\n  _proto.preload = function preload(value) {\n    if (value !== undefined) {\n      this.techCall_('setPreload', value);\n      this.options_.preload = value;\n      return;\n    }\n\n    return this.techGet_('preload');\n  }\n  /**\n   * Get or set the autoplay option. When this is a boolean it will\n   * modify the attribute on the tech. When this is a string the attribute on\n   * the tech will be removed and `Player` will handle autoplay on loadstarts.\n   *\n   * @param {boolean|string} [value]\n   *        - true: autoplay using the browser behavior\n   *        - false: do not autoplay\n   *        - 'play': call play() on every loadstart\n   *        - 'muted': call muted() then play() on every loadstart\n   *        - 'any': call play() on every loadstart. if that fails call muted() then play().\n   *        - *: values other than those listed here will be set `autoplay` to true\n   *\n   * @return {boolean|string}\n   *         The current value of autoplay when getting\n   */\n  ;\n\n  _proto.autoplay = function autoplay(value) {\n    // getter usage\n    if (value === undefined) {\n      return this.options_.autoplay || false;\n    }\n\n    var techAutoplay; // if the value is a valid string set it to that, or normalize `true` to 'play', if need be\n\n    if (typeof value === 'string' && /(any|play|muted)/.test(value) || value === true && this.options_.normalizeAutoplay) {\n      this.options_.autoplay = value;\n      this.manualAutoplay_(typeof value === 'string' ? value : 'play');\n      techAutoplay = false; // any falsy value sets autoplay to false in the browser,\n      // lets do the same\n    } else if (!value) {\n      this.options_.autoplay = false; // any other value (ie truthy) sets autoplay to true\n    } else {\n      this.options_.autoplay = true;\n    }\n\n    techAutoplay = typeof techAutoplay === 'undefined' ? this.options_.autoplay : techAutoplay; // if we don't have a tech then we do not queue up\n    // a setAutoplay call on tech ready. We do this because the\n    // autoplay option will be passed in the constructor and we\n    // do not need to set it twice\n\n    if (this.tech_) {\n      this.techCall_('setAutoplay', techAutoplay);\n    }\n  }\n  /**\n   * Set or unset the playsinline attribute.\n   * Playsinline tells the browser that non-fullscreen playback is preferred.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should try to play inline by default\n   *        - false means that we should use the browser's default playback mode,\n   *          which in most cases is inline. iOS Safari is a notable exception\n   *          and plays fullscreen by default.\n   *\n   * @return {string|Player}\n   *         - the current value of playsinline\n   *         - the player when setting\n   *\n   * @see [Spec]{@link https://html.spec.whatwg.org/#attr-video-playsinline}\n   */\n  ;\n\n  _proto.playsinline = function playsinline(value) {\n    if (value !== undefined) {\n      this.techCall_('setPlaysinline', value);\n      this.options_.playsinline = value;\n      return this;\n    }\n\n    return this.techGet_('playsinline');\n  }\n  /**\n   * Get or set the loop attribute on the video element.\n   *\n   * @param {boolean} [value]\n   *        - true means that we should loop the video\n   *        - false means that we should not loop the video\n   *\n   * @return {boolean}\n   *         The current value of loop when getting\n   */\n  ;\n\n  _proto.loop = function loop(value) {\n    if (value !== undefined) {\n      this.techCall_('setLoop', value);\n      this.options_.loop = value;\n      return;\n    }\n\n    return this.techGet_('loop');\n  }\n  /**\n   * Get or set the poster image source url\n   *\n   * @fires Player#posterchange\n   *\n   * @param {string} [src]\n   *        Poster image source URL\n   *\n   * @return {string}\n   *         The current value of poster when getting\n   */\n  ;\n\n  _proto.poster = function poster(src) {\n    if (src === undefined) {\n      return this.poster_;\n    } // The correct way to remove a poster is to set as an empty string\n    // other falsey values will throw errors\n\n\n    if (!src) {\n      src = '';\n    }\n\n    if (src === this.poster_) {\n      return;\n    } // update the internal poster variable\n\n\n    this.poster_ = src; // update the tech's poster\n\n    this.techCall_('setPoster', src);\n    this.isPosterFromTech_ = false; // alert components that the poster has been set\n\n    /**\n     * This event fires when the poster image is changed on the player.\n     *\n     * @event Player#posterchange\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('posterchange');\n  }\n  /**\n   * Some techs (e.g. YouTube) can provide a poster source in an\n   * asynchronous way. We want the poster component to use this\n   * poster source so that it covers up the tech's controls.\n   * (YouTube's play button). However we only want to use this\n   * source if the player user hasn't set a poster through\n   * the normal APIs.\n   *\n   * @fires Player#posterchange\n   * @listens Tech#posterchange\n   * @private\n   */\n  ;\n\n  _proto.handleTechPosterChange_ = function handleTechPosterChange_() {\n    if ((!this.poster_ || this.options_.techCanOverridePoster) && this.tech_ && this.tech_.poster) {\n      var newPoster = this.tech_.poster() || '';\n\n      if (newPoster !== this.poster_) {\n        this.poster_ = newPoster;\n        this.isPosterFromTech_ = true; // Let components know the poster has changed\n\n        this.trigger('posterchange');\n      }\n    }\n  }\n  /**\n   * Get or set whether or not the controls are showing.\n   *\n   * @fires Player#controlsenabled\n   *\n   * @param {boolean} [bool]\n   *        - true to turn controls on\n   *        - false to turn controls off\n   *\n   * @return {boolean}\n   *         The current value of controls when getting\n   */\n  ;\n\n  _proto.controls = function controls(bool) {\n    if (bool === undefined) {\n      return !!this.controls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.controls_ === bool) {\n      return;\n    }\n\n    this.controls_ = bool;\n\n    if (this.usingNativeControls()) {\n      this.techCall_('setControls', bool);\n    }\n\n    if (this.controls_) {\n      this.removeClass('vjs-controls-disabled');\n      this.addClass('vjs-controls-enabled');\n      /**\n       * @event Player#controlsenabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsenabled');\n\n      if (!this.usingNativeControls()) {\n        this.addTechControlsListeners_();\n      }\n    } else {\n      this.removeClass('vjs-controls-enabled');\n      this.addClass('vjs-controls-disabled');\n      /**\n       * @event Player#controlsdisabled\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('controlsdisabled');\n\n      if (!this.usingNativeControls()) {\n        this.removeTechControlsListeners_();\n      }\n    }\n  }\n  /**\n   * Toggle native controls on/off. Native controls are the controls built into\n   * devices (e.g. default iPhone controls) or other techs\n   * (e.g. Vimeo Controls)\n   * **This should only be set by the current tech, because only the tech knows\n   * if it can support native controls**\n   *\n   * @fires Player#usingnativecontrols\n   * @fires Player#usingcustomcontrols\n   *\n   * @param {boolean} [bool]\n   *        - true to turn native controls on\n   *        - false to turn native controls off\n   *\n   * @return {boolean}\n   *         The current value of native controls when getting\n   */\n  ;\n\n  _proto.usingNativeControls = function usingNativeControls(bool) {\n    if (bool === undefined) {\n      return !!this.usingNativeControls_;\n    }\n\n    bool = !!bool; // Don't trigger a change event unless it actually changed\n\n    if (this.usingNativeControls_ === bool) {\n      return;\n    }\n\n    this.usingNativeControls_ = bool;\n\n    if (this.usingNativeControls_) {\n      this.addClass('vjs-using-native-controls');\n      /**\n       * player is using the native device controls\n       *\n       * @event Player#usingnativecontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingnativecontrols');\n    } else {\n      this.removeClass('vjs-using-native-controls');\n      /**\n       * player is using the custom HTML controls\n       *\n       * @event Player#usingcustomcontrols\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('usingcustomcontrols');\n    }\n  }\n  /**\n   * Set or get the current MediaError\n   *\n   * @fires Player#error\n   *\n   * @param  {MediaError|string|number} [err]\n   *         A MediaError or a string/number to be turned\n   *         into a MediaError\n   *\n   * @return {MediaError|null}\n   *         The current MediaError when getting (or null)\n   */\n  ;\n\n  _proto.error = function error(err) {\n    var _this18 = this;\n\n    if (err === undefined) {\n      return this.error_ || null;\n    } // allow hooks to modify error object\n\n\n    hooks('beforeerror').forEach(function (hookFunction) {\n      var newErr = hookFunction(_this18, err);\n\n      if (!(isObject(newErr) && !Array.isArray(newErr) || typeof newErr === 'string' || typeof newErr === 'number' || newErr === null)) {\n        _this18.log.error('please return a value that MediaError expects in beforeerror hooks');\n\n        return;\n      }\n\n      err = newErr;\n    }); // Suppress the first error message for no compatible source until\n    // user interaction\n\n    if (this.options_.suppressNotSupportedError && err && err.code === 4) {\n      var triggerSuppressedError = function triggerSuppressedError() {\n        this.error(err);\n      };\n\n      this.options_.suppressNotSupportedError = false;\n      this.any(['click', 'touchstart'], triggerSuppressedError);\n      this.one('loadstart', function () {\n        this.off(['click', 'touchstart'], triggerSuppressedError);\n      });\n      return;\n    } // restoring to default\n\n\n    if (err === null) {\n      this.error_ = err;\n      this.removeClass('vjs-error');\n\n      if (this.errorDisplay) {\n        this.errorDisplay.close();\n      }\n\n      return;\n    }\n\n    this.error_ = new MediaError(err); // add the vjs-error classname to the player\n\n    this.addClass('vjs-error'); // log the name of the error type and any message\n    // IE11 logs \"[object object]\" and required you to expand message to see error object\n\n    log$1.error(\"(CODE:\" + this.error_.code + \" \" + MediaError.errorTypes[this.error_.code] + \")\", this.error_.message, this.error_);\n    /**\n     * @event Player#error\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('error'); // notify hooks of the per player error\n\n    hooks('error').forEach(function (hookFunction) {\n      return hookFunction(_this18, _this18.error_);\n    });\n    return;\n  }\n  /**\n   * Report user activity\n   *\n   * @param {Object} event\n   *        Event object\n   */\n  ;\n\n  _proto.reportUserActivity = function reportUserActivity(event) {\n    this.userActivity_ = true;\n  }\n  /**\n   * Get/set if user is active\n   *\n   * @fires Player#useractive\n   * @fires Player#userinactive\n   *\n   * @param {boolean} [bool]\n   *        - true if the user is active\n   *        - false if the user is inactive\n   *\n   * @return {boolean}\n   *         The current value of userActive when getting\n   */\n  ;\n\n  _proto.userActive = function userActive(bool) {\n    if (bool === undefined) {\n      return this.userActive_;\n    }\n\n    bool = !!bool;\n\n    if (bool === this.userActive_) {\n      return;\n    }\n\n    this.userActive_ = bool;\n\n    if (this.userActive_) {\n      this.userActivity_ = true;\n      this.removeClass('vjs-user-inactive');\n      this.addClass('vjs-user-active');\n      /**\n       * @event Player#useractive\n       * @type {EventTarget~Event}\n       */\n\n      this.trigger('useractive');\n      return;\n    } // Chrome/Safari/IE have bugs where when you change the cursor it can\n    // trigger a mousemove event. This causes an issue when you're hiding\n    // the cursor when the user is inactive, and a mousemove signals user\n    // activity. Making it impossible to go into inactive mode. Specifically\n    // this happens in fullscreen when we really need to hide the cursor.\n    //\n    // When this gets resolved in ALL browsers it can be removed\n    // https://code.google.com/p/chromium/issues/detail?id=103041\n\n\n    if (this.tech_) {\n      this.tech_.one('mousemove', function (e) {\n        e.stopPropagation();\n        e.preventDefault();\n      });\n    }\n\n    this.userActivity_ = false;\n    this.removeClass('vjs-user-active');\n    this.addClass('vjs-user-inactive');\n    /**\n     * @event Player#userinactive\n     * @type {EventTarget~Event}\n     */\n\n    this.trigger('userinactive');\n  }\n  /**\n   * Listen for user activity based on timeout value\n   *\n   * @private\n   */\n  ;\n\n  _proto.listenForUserActivity_ = function listenForUserActivity_() {\n    var mouseInProgress;\n    var lastMoveX;\n    var lastMoveY;\n    var handleActivity = bind(this, this.reportUserActivity);\n\n    var handleMouseMove = function handleMouseMove(e) {\n      // #1068 - Prevent mousemove spamming\n      // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970\n      if (e.screenX !== lastMoveX || e.screenY !== lastMoveY) {\n        lastMoveX = e.screenX;\n        lastMoveY = e.screenY;\n        handleActivity();\n      }\n    };\n\n    var handleMouseDown = function handleMouseDown() {\n      handleActivity(); // For as long as the they are touching the device or have their mouse down,\n      // we consider them active even if they're not moving their finger or mouse.\n      // So we want to continue to update that they are active\n\n      this.clearInterval(mouseInProgress); // Setting userActivity=true now and setting the interval to the same time\n      // as the activityCheck interval (250) should ensure we never miss the\n      // next activityCheck\n\n      mouseInProgress = this.setInterval(handleActivity, 250);\n    };\n\n    var handleMouseUpAndMouseLeave = function handleMouseUpAndMouseLeave(event) {\n      handleActivity(); // Stop the interval that maintains activity if the mouse/touch is down\n\n      this.clearInterval(mouseInProgress);\n    }; // Any mouse movement will be considered user activity\n\n\n    this.on('mousedown', handleMouseDown);\n    this.on('mousemove', handleMouseMove);\n    this.on('mouseup', handleMouseUpAndMouseLeave);\n    this.on('mouseleave', handleMouseUpAndMouseLeave);\n    var controlBar = this.getChild('controlBar'); // Fixes bug on Android & iOS where when tapping progressBar (when control bar is displayed)\n    // controlBar would no longer be hidden by default timeout.\n\n    if (controlBar && !IS_IOS && !IS_ANDROID) {\n      controlBar.on('mouseenter', function (event) {\n        if (this.player().options_.inactivityTimeout !== 0) {\n          this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;\n        }\n\n        this.player().options_.inactivityTimeout = 0;\n      });\n      controlBar.on('mouseleave', function (event) {\n        this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;\n      });\n    } // Listen for keyboard navigation\n    // Shouldn't need to use inProgress interval because of key repeat\n\n\n    this.on('keydown', handleActivity);\n    this.on('keyup', handleActivity); // Run an interval every 250 milliseconds instead of stuffing everything into\n    // the mousemove/touchmove function itself, to prevent performance degradation.\n    // `this.reportUserActivity` simply sets this.userActivity_ to true, which\n    // then gets picked up by this loop\n    // http://ejohn.org/blog/learning-from-twitter/\n\n    var inactivityTimeout;\n    this.setInterval(function () {\n      // Check to see if mouse/touch activity has happened\n      if (!this.userActivity_) {\n        return;\n      } // Reset the activity tracker\n\n\n      this.userActivity_ = false; // If the user state was inactive, set the state to active\n\n      this.userActive(true); // Clear any existing inactivity timeout to start the timer over\n\n      this.clearTimeout(inactivityTimeout);\n      var timeout = this.options_.inactivityTimeout;\n\n      if (timeout <= 0) {\n        return;\n      } // In <timeout> milliseconds, if no more activity has occurred the\n      // user will be considered inactive\n\n\n      inactivityTimeout = this.setTimeout(function () {\n        // Protect against the case where the inactivityTimeout can trigger just\n        // before the next user activity is picked up by the activity check loop\n        // causing a flicker\n        if (!this.userActivity_) {\n          this.userActive(false);\n        }\n      }, timeout);\n    }, 250);\n  }\n  /**\n   * Gets or sets the current playback rate. A playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed\n   * playback, for instance.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-playbackrate\n   *\n   * @param {number} [rate]\n   *       New playback rate to set.\n   *\n   * @return {number}\n   *         The current playback rate when getting or 1.0\n   */\n  ;\n\n  _proto.playbackRate = function playbackRate(rate) {\n    if (rate !== undefined) {\n      // NOTE: this.cache_.lastPlaybackRate is set from the tech handler\n      // that is registered above\n      this.techCall_('setPlaybackRate', rate);\n      return;\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.cache_.lastPlaybackRate || this.techGet_('playbackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the current default playback rate. A default playback rate of\n   * 1.0 represents normal speed and 0.5 would indicate half-speed playback, for instance.\n   * defaultPlaybackRate will only represent what the initial playbackRate of a video was, not\n   * not the current playbackRate.\n   *\n   * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-defaultplaybackrate\n   *\n   * @param {number} [rate]\n   *       New default playback rate to set.\n   *\n   * @return {number|Player}\n   *         - The default playback rate when getting or 1.0\n   *         - the player when setting\n   */\n  ;\n\n  _proto.defaultPlaybackRate = function defaultPlaybackRate(rate) {\n    if (rate !== undefined) {\n      return this.techCall_('setDefaultPlaybackRate', rate);\n    }\n\n    if (this.tech_ && this.tech_.featuresPlaybackRate) {\n      return this.techGet_('defaultPlaybackRate');\n    }\n\n    return 1.0;\n  }\n  /**\n   * Gets or sets the audio flag\n   *\n   * @param {boolean} bool\n   *        - true signals that this is an audio player\n   *        - false signals that this is not an audio player\n   *\n   * @return {boolean}\n   *         The current value of isAudio when getting\n   */\n  ;\n\n  _proto.isAudio = function isAudio(bool) {\n    if (bool !== undefined) {\n      this.isAudio_ = !!bool;\n      return;\n    }\n\n    return !!this.isAudio_;\n  };\n\n  _proto.enableAudioOnlyUI_ = function enableAudioOnlyUI_() {\n    var _this19 = this;\n\n    // Update styling immediately to show the control bar so we can get its height\n    this.addClass('vjs-audio-only-mode');\n    var playerChildren = this.children();\n    var controlBar = this.getChild('ControlBar');\n    var controlBarHeight = controlBar && controlBar.currentHeight(); // Hide all player components except the control bar. Control bar components\n    // needed only for video are hidden with CSS\n\n    playerChildren.forEach(function (child) {\n      if (child === controlBar) {\n        return;\n      }\n\n      if (child.el_ && !child.hasClass('vjs-hidden')) {\n        child.hide();\n\n        _this19.audioOnlyCache_.hiddenChildren.push(child);\n      }\n    });\n    this.audioOnlyCache_.playerHeight = this.currentHeight(); // Set the player height the same as the control bar\n\n    this.height(controlBarHeight);\n    this.trigger('audioonlymodechange');\n  };\n\n  _proto.disableAudioOnlyUI_ = function disableAudioOnlyUI_() {\n    this.removeClass('vjs-audio-only-mode'); // Show player components that were previously hidden\n\n    this.audioOnlyCache_.hiddenChildren.forEach(function (child) {\n      return child.show();\n    }); // Reset player height\n\n    this.height(this.audioOnlyCache_.playerHeight);\n    this.trigger('audioonlymodechange');\n  }\n  /**\n   * Get the current audioOnlyMode state or set audioOnlyMode to true or false.\n   *\n   * Setting this to `true` will hide all player components except the control bar,\n   * as well as control bar components needed only for video.\n   *\n   * @param {boolean} [value]\n   *         The value to set audioOnlyMode to.\n   *\n   * @return {Promise|boolean}\n   *        A Promise is returned when setting the state, and a boolean when getting\n   *        the present state\n   */\n  ;\n\n  _proto.audioOnlyMode = function audioOnlyMode(value) {\n    var _this20 = this;\n\n    if (typeof value !== 'boolean' || value === this.audioOnlyMode_) {\n      return this.audioOnlyMode_;\n    }\n\n    this.audioOnlyMode_ = value;\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      // Enable Audio Only Mode\n      if (value) {\n        var exitPromises = []; // Fullscreen and PiP are not supported in audioOnlyMode, so exit if we need to.\n\n        if (this.isInPictureInPicture()) {\n          exitPromises.push(this.exitPictureInPicture());\n        }\n\n        if (this.isFullscreen()) {\n          exitPromises.push(this.exitFullscreen());\n        }\n\n        if (this.audioPosterMode()) {\n          exitPromises.push(this.audioPosterMode(false));\n        }\n\n        return PromiseClass.all(exitPromises).then(function () {\n          return _this20.enableAudioOnlyUI_();\n        });\n      } // Disable Audio Only Mode\n\n\n      return PromiseClass.resolve().then(function () {\n        return _this20.disableAudioOnlyUI_();\n      });\n    }\n\n    if (value) {\n      if (this.isInPictureInPicture()) {\n        this.exitPictureInPicture();\n      }\n\n      if (this.isFullscreen()) {\n        this.exitFullscreen();\n      }\n\n      this.enableAudioOnlyUI_();\n    } else {\n      this.disableAudioOnlyUI_();\n    }\n  };\n\n  _proto.enablePosterModeUI_ = function enablePosterModeUI_() {\n    // Hide the video element and show the poster image to enable posterModeUI\n    var tech = this.tech_ && this.tech_;\n    tech.hide();\n    this.addClass('vjs-audio-poster-mode');\n    this.trigger('audiopostermodechange');\n  };\n\n  _proto.disablePosterModeUI_ = function disablePosterModeUI_() {\n    // Show the video element and hide the poster image to disable posterModeUI\n    var tech = this.tech_ && this.tech_;\n    tech.show();\n    this.removeClass('vjs-audio-poster-mode');\n    this.trigger('audiopostermodechange');\n  }\n  /**\n   * Get the current audioPosterMode state or set audioPosterMode to true or false\n   *\n   * @param {boolean} [value]\n   *         The value to set audioPosterMode to.\n   *\n   * @return {Promise|boolean}\n   *         A Promise is returned when setting the state, and a boolean when getting\n   *        the present state\n   */\n  ;\n\n  _proto.audioPosterMode = function audioPosterMode(value) {\n    var _this21 = this;\n\n    if (typeof value !== 'boolean' || value === this.audioPosterMode_) {\n      return this.audioPosterMode_;\n    }\n\n    this.audioPosterMode_ = value;\n    var PromiseClass = this.options_.Promise || window$1.Promise;\n\n    if (PromiseClass) {\n      if (value) {\n        if (this.audioOnlyMode()) {\n          var audioOnlyModePromise = this.audioOnlyMode(false);\n          return audioOnlyModePromise.then(function () {\n            // enable audio poster mode after audio only mode is disabled\n            _this21.enablePosterModeUI_();\n          });\n        }\n\n        return PromiseClass.resolve().then(function () {\n          // enable audio poster mode\n          _this21.enablePosterModeUI_();\n        });\n      }\n\n      return PromiseClass.resolve().then(function () {\n        // disable audio poster mode\n        _this21.disablePosterModeUI_();\n      });\n    }\n\n    if (value) {\n      if (this.audioOnlyMode()) {\n        this.audioOnlyMode(false);\n      }\n\n      this.enablePosterModeUI_();\n      return;\n    }\n\n    this.disablePosterModeUI_();\n  }\n  /**\n   * A helper method for adding a {@link TextTrack} to our\n   * {@link TextTrackList}.\n   *\n   * In addition to the W3C settings we allow adding additional info through options.\n   *\n   * @see http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack\n   *\n   * @param {string} [kind]\n   *        the kind of TextTrack you are adding\n   *\n   * @param {string} [label]\n   *        the label to give the TextTrack label\n   *\n   * @param {string} [language]\n   *        the language to set on the TextTrack\n   *\n   * @return {TextTrack|undefined}\n   *         the TextTrack that was added or undefined\n   *         if there is no tech\n   */\n  ;\n\n  _proto.addTextTrack = function addTextTrack(kind, label, language) {\n    if (this.tech_) {\n      return this.tech_.addTextTrack(kind, label, language);\n    }\n  }\n  /**\n   * Create a remote {@link TextTrack} and an {@link HTMLTrackElement}.\n   * When manualCleanup is set to false, the track will be automatically removed\n   * on source changes.\n   *\n   * @param {Object} options\n   *        Options to pass to {@link HTMLTrackElement} during creation. See\n   *        {@link HTMLTrackElement} for object properties that you should use.\n   *\n   * @param {boolean} [manualCleanup=true] if set to false, the TextTrack will be\n   *                                       removed on a source change\n   *\n   * @return {HtmlTrackElement}\n   *         the HTMLTrackElement that was created and added\n   *         to the HtmlTrackElementList and the remote\n   *         TextTrackList\n   *\n   * @deprecated The default value of the \"manualCleanup\" parameter will default\n   *             to \"false\" in upcoming versions of Video.js\n   */\n  ;\n\n  _proto.addRemoteTextTrack = function addRemoteTextTrack(options, manualCleanup) {\n    if (this.tech_) {\n      return this.tech_.addRemoteTextTrack(options, manualCleanup);\n    }\n  }\n  /**\n   * Remove a remote {@link TextTrack} from the respective\n   * {@link TextTrackList} and {@link HtmlTrackElementList}.\n   *\n   * @param {Object} track\n   *        Remote {@link TextTrack} to remove\n   *\n   * @return {undefined}\n   *         does not return anything\n   */\n  ;\n\n  _proto.removeRemoteTextTrack = function removeRemoteTextTrack(obj) {\n    if (obj === void 0) {\n      obj = {};\n    }\n\n    var _obj = obj,\n        track = _obj.track;\n\n    if (!track) {\n      track = obj;\n    } // destructure the input into an object with a track argument, defaulting to arguments[0]\n    // default the whole argument to an empty object if nothing was passed in\n\n\n    if (this.tech_) {\n      return this.tech_.removeRemoteTextTrack(track);\n    }\n  }\n  /**\n   * Gets available media playback quality metrics as specified by the W3C's Media\n   * Playback Quality API.\n   *\n   * @see [Spec]{@link https://wicg.github.io/media-playback-quality}\n   *\n   * @return {Object|undefined}\n   *         An object with supported media playback quality metrics or undefined if there\n   *         is no tech or the tech does not support it.\n   */\n  ;\n\n  _proto.getVideoPlaybackQuality = function getVideoPlaybackQuality() {\n    return this.techGet_('getVideoPlaybackQuality');\n  }\n  /**\n   * Get video width\n   *\n   * @return {number}\n   *         current video width\n   */\n  ;\n\n  _proto.videoWidth = function videoWidth() {\n    return this.tech_ && this.tech_.videoWidth && this.tech_.videoWidth() || 0;\n  }\n  /**\n   * Get video height\n   *\n   * @return {number}\n   *         current video height\n   */\n  ;\n\n  _proto.videoHeight = function videoHeight() {\n    return this.tech_ && this.tech_.videoHeight && this.tech_.videoHeight() || 0;\n  }\n  /**\n   * The player's language code.\n   *\n   * Changing the language will trigger\n   * [languagechange]{@link Player#event:languagechange}\n   * which Components can use to update control text.\n   * ClickableComponent will update its control text by default on\n   * [languagechange]{@link Player#event:languagechange}.\n   *\n   * @fires Player#languagechange\n   *\n   * @param {string} [code]\n   *        the language code to set the player to\n   *\n   * @return {string}\n   *         The current language code when getting\n   */\n  ;\n\n  _proto.language = function language(code) {\n    if (code === undefined) {\n      return this.language_;\n    }\n\n    if (this.language_ !== String(code).toLowerCase()) {\n      this.language_ = String(code).toLowerCase(); // during first init, it's possible some things won't be evented\n\n      if (isEvented(this)) {\n        /**\n        * fires when the player language change\n        *\n        * @event Player#languagechange\n        * @type {EventTarget~Event}\n        */\n        this.trigger('languagechange');\n      }\n    }\n  }\n  /**\n   * Get the player's language dictionary\n   * Merge every time, because a newly added plugin might call videojs.addLanguage() at any time\n   * Languages specified directly in the player options have precedence\n   *\n   * @return {Array}\n   *         An array of of supported languages\n   */\n  ;\n\n  _proto.languages = function languages() {\n    return mergeOptions$3(Player.prototype.options_.languages, this.languages_);\n  }\n  /**\n   * returns a JavaScript object reperesenting the current track\n   * information. **DOES not return it as JSON**\n   *\n   * @return {Object}\n   *         Object representing the current of track info\n   */\n  ;\n\n  _proto.toJSON = function toJSON() {\n    var options = mergeOptions$3(this.options_);\n    var tracks = options.tracks;\n    options.tracks = [];\n\n    for (var i = 0; i < tracks.length; i++) {\n      var track = tracks[i]; // deep merge tracks and null out player so no circular references\n\n      track = mergeOptions$3(track);\n      track.player = undefined;\n      options.tracks[i] = track;\n    }\n\n    return options;\n  }\n  /**\n   * Creates a simple modal dialog (an instance of the {@link ModalDialog}\n   * component) that immediately overlays the player with arbitrary\n   * content and removes itself when closed.\n   *\n   * @param {string|Function|Element|Array|null} content\n   *        Same as {@link ModalDialog#content}'s param of the same name.\n   *        The most straight-forward usage is to provide a string or DOM\n   *        element.\n   *\n   * @param {Object} [options]\n   *        Extra options which will be passed on to the {@link ModalDialog}.\n   *\n   * @return {ModalDialog}\n   *         the {@link ModalDialog} that was created\n   */\n  ;\n\n  _proto.createModal = function createModal(content, options) {\n    var _this22 = this;\n\n    options = options || {};\n    options.content = content || '';\n    var modal = new ModalDialog(this, options);\n    this.addChild(modal);\n    modal.on('dispose', function () {\n      _this22.removeChild(modal);\n    });\n    modal.open();\n    return modal;\n  }\n  /**\n   * Change breakpoint classes when the player resizes.\n   *\n   * @private\n   */\n  ;\n\n  _proto.updateCurrentBreakpoint_ = function updateCurrentBreakpoint_() {\n    if (!this.responsive()) {\n      return;\n    }\n\n    var currentBreakpoint = this.currentBreakpoint();\n    var currentWidth = this.currentWidth();\n\n    for (var i = 0; i < BREAKPOINT_ORDER.length; i++) {\n      var candidateBreakpoint = BREAKPOINT_ORDER[i];\n      var maxWidth = this.breakpoints_[candidateBreakpoint];\n\n      if (currentWidth <= maxWidth) {\n        // The current breakpoint did not change, nothing to do.\n        if (currentBreakpoint === candidateBreakpoint) {\n          return;\n        } // Only remove a class if there is a current breakpoint.\n\n\n        if (currentBreakpoint) {\n          this.removeClass(BREAKPOINT_CLASSES[currentBreakpoint]);\n        }\n\n        this.addClass(BREAKPOINT_CLASSES[candidateBreakpoint]);\n        this.breakpoint_ = candidateBreakpoint;\n        break;\n      }\n    }\n  }\n  /**\n   * Removes the current breakpoint.\n   *\n   * @private\n   */\n  ;\n\n  _proto.removeCurrentBreakpoint_ = function removeCurrentBreakpoint_() {\n    var className = this.currentBreakpointClass();\n    this.breakpoint_ = '';\n\n    if (className) {\n      this.removeClass(className);\n    }\n  }\n  /**\n   * Get or set breakpoints on the player.\n   *\n   * Calling this method with an object or `true` will remove any previous\n   * custom breakpoints and start from the defaults again.\n   *\n   * @param  {Object|boolean} [breakpoints]\n   *         If an object is given, it can be used to provide custom\n   *         breakpoints. If `true` is given, will set default breakpoints.\n   *         If this argument is not given, will simply return the current\n   *         breakpoints.\n   *\n   * @param  {number} [breakpoints.tiny]\n   *         The maximum width for the \"vjs-layout-tiny\" class.\n   *\n   * @param  {number} [breakpoints.xsmall]\n   *         The maximum width for the \"vjs-layout-x-small\" class.\n   *\n   * @param  {number} [breakpoints.small]\n   *         The maximum width for the \"vjs-layout-small\" class.\n   *\n   * @param  {number} [breakpoints.medium]\n   *         The maximum width for the \"vjs-layout-medium\" class.\n   *\n   * @param  {number} [breakpoints.large]\n   *         The maximum width for the \"vjs-layout-large\" class.\n   *\n   * @param  {number} [breakpoints.xlarge]\n   *         The maximum width for the \"vjs-layout-x-large\" class.\n   *\n   * @param  {number} [breakpoints.huge]\n   *         The maximum width for the \"vjs-layout-huge\" class.\n   *\n   * @return {Object}\n   *         An object mapping breakpoint names to maximum width values.\n   */\n  ;\n\n  _proto.breakpoints = function breakpoints(_breakpoints) {\n    // Used as a getter.\n    if (_breakpoints === undefined) {\n      return assign(this.breakpoints_);\n    }\n\n    this.breakpoint_ = '';\n    this.breakpoints_ = assign({}, DEFAULT_BREAKPOINTS, _breakpoints); // When breakpoint definitions change, we need to update the currently\n    // selected breakpoint.\n\n    this.updateCurrentBreakpoint_(); // Clone the breakpoints before returning.\n\n    return assign(this.breakpoints_);\n  }\n  /**\n   * Get or set a flag indicating whether or not this player should adjust\n   * its UI based on its dimensions.\n   *\n   * @param  {boolean} value\n   *         Should be `true` if the player should adjust its UI based on its\n   *         dimensions; otherwise, should be `false`.\n   *\n   * @return {boolean}\n   *         Will be `true` if this player should adjust its UI based on its\n   *         dimensions; otherwise, will be `false`.\n   */\n  ;\n\n  _proto.responsive = function responsive(value) {\n    // Used as a getter.\n    if (value === undefined) {\n      return this.responsive_;\n    }\n\n    value = Boolean(value);\n    var current = this.responsive_; // Nothing changed.\n\n    if (value === current) {\n      return;\n    } // The value actually changed, set it.\n\n\n    this.responsive_ = value; // Start listening for breakpoints and set the initial breakpoint if the\n    // player is now responsive.\n\n    if (value) {\n      this.on('playerresize', this.boundUpdateCurrentBreakpoint_);\n      this.updateCurrentBreakpoint_(); // Stop listening for breakpoints if the player is no longer responsive.\n    } else {\n      this.off('playerresize', this.boundUpdateCurrentBreakpoint_);\n      this.removeCurrentBreakpoint_();\n    }\n\n    return value;\n  }\n  /**\n   * Get current breakpoint name, if any.\n   *\n   * @return {string}\n   *         If there is currently a breakpoint set, returns a the key from the\n   *         breakpoints object matching it. Otherwise, returns an empty string.\n   */\n  ;\n\n  _proto.currentBreakpoint = function currentBreakpoint() {\n    return this.breakpoint_;\n  }\n  /**\n   * Get the current breakpoint class name.\n   *\n   * @return {string}\n   *         The matching class name (e.g. `\"vjs-layout-tiny\"` or\n   *         `\"vjs-layout-large\"`) for the current breakpoint. Empty string if\n   *         there is no current breakpoint.\n   */\n  ;\n\n  _proto.currentBreakpointClass = function currentBreakpointClass() {\n    return BREAKPOINT_CLASSES[this.breakpoint_] || '';\n  }\n  /**\n   * An object that describes a single piece of media.\n   *\n   * Properties that are not part of this type description will be retained; so,\n   * this can be viewed as a generic metadata storage mechanism as well.\n   *\n   * @see      {@link https://wicg.github.io/mediasession/#the-mediametadata-interface}\n   * @typedef  {Object} Player~MediaObject\n   *\n   * @property {string} [album]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {string} [artist]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [artwork]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API. If not specified, will be populated via the `poster`, if\n   *           available.\n   *\n   * @property {string} [poster]\n   *           URL to an image that will display before playback.\n   *\n   * @property {Tech~SourceObject|Tech~SourceObject[]|string} [src]\n   *           A single source object, an array of source objects, or a string\n   *           referencing a URL to a media source. It is _highly recommended_\n   *           that an object or array of objects is used here, so that source\n   *           selection algorithms can take the `type` into account.\n   *\n   * @property {string} [title]\n   *           Unused, except if this object is passed to the `MediaSession`\n   *           API.\n   *\n   * @property {Object[]} [textTracks]\n   *           An array of objects to be used to create text tracks, following\n   *           the {@link https://www.w3.org/TR/html50/embedded-content-0.html#the-track-element|native track element format}.\n   *           For ease of removal, these will be created as \"remote\" text\n   *           tracks and set to automatically clean up on source changes.\n   *\n   *           These objects may have properties like `src`, `kind`, `label`,\n   *           and `language`, see {@link Tech#createRemoteTextTrack}.\n   */\n\n  /**\n   * Populate the player using a {@link Player~MediaObject|MediaObject}.\n   *\n   * @param  {Player~MediaObject} media\n   *         A media object.\n   *\n   * @param  {Function} ready\n   *         A callback to be called when the player is ready.\n   */\n  ;\n\n  _proto.loadMedia = function loadMedia(media, ready) {\n    var _this23 = this;\n\n    if (!media || typeof media !== 'object') {\n      return;\n    }\n\n    this.reset(); // Clone the media object so it cannot be mutated from outside.\n\n    this.cache_.media = mergeOptions$3(media);\n    var _this$cache_$media = this.cache_.media,\n        artwork = _this$cache_$media.artwork,\n        poster = _this$cache_$media.poster,\n        src = _this$cache_$media.src,\n        textTracks = _this$cache_$media.textTracks; // If `artwork` is not given, create it using `poster`.\n\n    if (!artwork && poster) {\n      this.cache_.media.artwork = [{\n        src: poster,\n        type: getMimetype(poster)\n      }];\n    }\n\n    if (src) {\n      this.src(src);\n    }\n\n    if (poster) {\n      this.poster(poster);\n    }\n\n    if (Array.isArray(textTracks)) {\n      textTracks.forEach(function (tt) {\n        return _this23.addRemoteTextTrack(tt, false);\n      });\n    }\n\n    this.ready(ready);\n  }\n  /**\n   * Get a clone of the current {@link Player~MediaObject} for this player.\n   *\n   * If the `loadMedia` method has not been used, will attempt to return a\n   * {@link Player~MediaObject} based on the current state of the player.\n   *\n   * @return {Player~MediaObject}\n   */\n  ;\n\n  _proto.getMedia = function getMedia() {\n    if (!this.cache_.media) {\n      var poster = this.poster();\n      var src = this.currentSources();\n      var textTracks = Array.prototype.map.call(this.remoteTextTracks(), function (tt) {\n        return {\n          kind: tt.kind,\n          label: tt.label,\n          language: tt.language,\n          src: tt.src\n        };\n      });\n      var media = {\n        src: src,\n        textTracks: textTracks\n      };\n\n      if (poster) {\n        media.poster = poster;\n        media.artwork = [{\n          src: media.poster,\n          type: getMimetype(media.poster)\n        }];\n      }\n\n      return media;\n    }\n\n    return mergeOptions$3(this.cache_.media);\n  }\n  /**\n   * Gets tag settings\n   *\n   * @param {Element} tag\n   *        The player tag\n   *\n   * @return {Object}\n   *         An object containing all of the settings\n   *         for a player tag\n   */\n  ;\n\n  Player.getTagSettings = function getTagSettings(tag) {\n    var baseOptions = {\n      sources: [],\n      tracks: []\n    };\n    var tagOptions = getAttributes(tag);\n    var dataSetup = tagOptions['data-setup'];\n\n    if (hasClass(tag, 'vjs-fill')) {\n      tagOptions.fill = true;\n    }\n\n    if (hasClass(tag, 'vjs-fluid')) {\n      tagOptions.fluid = true;\n    } // Check if data-setup attr exists.\n\n\n    if (dataSetup !== null) {\n      // Parse options JSON\n      // If empty string, make it a parsable json object.\n      var _safeParseTuple = safeParseTuple(dataSetup || '{}'),\n          err = _safeParseTuple[0],\n          data = _safeParseTuple[1];\n\n      if (err) {\n        log$1.error(err);\n      }\n\n      assign(tagOptions, data);\n    }\n\n    assign(baseOptions, tagOptions); // Get tag children settings\n\n    if (tag.hasChildNodes()) {\n      var children = tag.childNodes;\n\n      for (var i = 0, j = children.length; i < j; i++) {\n        var child = children[i]; // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/\n\n        var childName = child.nodeName.toLowerCase();\n\n        if (childName === 'source') {\n          baseOptions.sources.push(getAttributes(child));\n        } else if (childName === 'track') {\n          baseOptions.tracks.push(getAttributes(child));\n        }\n      }\n    }\n\n    return baseOptions;\n  }\n  /**\n   * Determine whether or not flexbox is supported\n   *\n   * @return {boolean}\n   *         - true if flexbox is supported\n   *         - false if flexbox is not supported\n   */\n  ;\n\n  _proto.flexNotSupported_ = function flexNotSupported_() {\n    var elem = document.createElement('i'); // Note: We don't actually use flexBasis (or flexOrder), but it's one of the more\n    // common flex features that we can rely on when checking for flex support.\n\n    return !('flexBasis' in elem.style || 'webkitFlexBasis' in elem.style || 'mozFlexBasis' in elem.style || 'msFlexBasis' in elem.style || // IE10-specific (2012 flex spec), available for completeness\n    'msFlexOrder' in elem.style);\n  }\n  /**\n   * Set debug mode to enable/disable logs at info level.\n   *\n   * @param {boolean} enabled\n   * @fires Player#debugon\n   * @fires Player#debugoff\n   */\n  ;\n\n  _proto.debug = function debug(enabled) {\n    if (enabled === undefined) {\n      return this.debugEnabled_;\n    }\n\n    if (enabled) {\n      this.trigger('debugon');\n      this.previousLogLevel_ = this.log.level;\n      this.log.level('debug');\n      this.debugEnabled_ = true;\n    } else {\n      this.trigger('debugoff');\n      this.log.level(this.previousLogLevel_);\n      this.previousLogLevel_ = undefined;\n      this.debugEnabled_ = false;\n    }\n  }\n  /**\n   * Set or get current playback rates.\n   * Takes an array and updates the playback rates menu with the new items.\n   * Pass in an empty array to hide the menu.\n   * Values other than arrays are ignored.\n   *\n   * @fires Player#playbackrateschange\n   * @param {number[]} newRates\n   *                   The new rates that the playback rates menu should update to.\n   *                   An empty array will hide the menu\n   * @return {number[]} When used as a getter will return the current playback rates\n   */\n  ;\n\n  _proto.playbackRates = function playbackRates(newRates) {\n    if (newRates === undefined) {\n      return this.cache_.playbackRates;\n    } // ignore any value that isn't an array\n\n\n    if (!Array.isArray(newRates)) {\n      return;\n    } // ignore any arrays that don't only contain numbers\n\n\n    if (!newRates.every(function (rate) {\n      return typeof rate === 'number';\n    })) {\n      return;\n    }\n\n    this.cache_.playbackRates = newRates;\n    /**\n    * fires when the playback rates in a player are changed\n    *\n    * @event Player#playbackrateschange\n    * @type {EventTarget~Event}\n    */\n\n    this.trigger('playbackrateschange');\n  };\n\n  return Player;\n}(Component$1);\n/**\n * Get the {@link VideoTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#videotracklist\n *\n * @return {VideoTrackList}\n *         the current video track list\n *\n * @method Player.prototype.videoTracks\n */\n\n/**\n * Get the {@link AudioTrackList}\n * @link https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist\n *\n * @return {AudioTrackList}\n *         the current audio track list\n *\n * @method Player.prototype.audioTracks\n */\n\n/**\n * Get the {@link TextTrackList}\n *\n * @link http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks\n *\n * @return {TextTrackList}\n *         the current text track list\n *\n * @method Player.prototype.textTracks\n */\n\n/**\n * Get the remote {@link TextTrackList}\n *\n * @return {TextTrackList}\n *         The current remote text track list\n *\n * @method Player.prototype.remoteTextTracks\n */\n\n/**\n * Get the remote {@link HtmlTrackElementList} tracks.\n *\n * @return {HtmlTrackElementList}\n *         The current remote text track element list\n *\n * @method Player.prototype.remoteTextTrackEls\n */\n\n\nALL.names.forEach(function (name) {\n  var props = ALL[name];\n\n  Player.prototype[props.getterName] = function () {\n    if (this.tech_) {\n      return this.tech_[props.getterName]();\n    } // if we have not yet loadTech_, we create {video,audio,text}Tracks_\n    // these will be passed to the tech during loading\n\n\n    this[props.privateName] = this[props.privateName] || new props.ListClass();\n    return this[props.privateName];\n  };\n});\n/**\n * Get or set the `Player`'s crossorigin option. For the HTML5 player, this\n * sets the `crossOrigin` property on the `<video>` tag to control the CORS\n * behavior.\n *\n * @see [Video Element Attributes]{@link https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video#attr-crossorigin}\n *\n * @param {string} [value]\n *        The value to set the `Player`'s crossorigin to. If an argument is\n *        given, must be one of `anonymous` or `use-credentials`.\n *\n * @return {string|undefined}\n *         - The current crossorigin value of the `Player` when getting.\n *         - undefined when setting\n */\n\nPlayer.prototype.crossorigin = Player.prototype.crossOrigin;\n/**\n * Global enumeration of players.\n *\n * The keys are the player IDs and the values are either the {@link Player}\n * instance or `null` for disposed players.\n *\n * @type {Object}\n */\n\nPlayer.players = {};\nvar navigator = window$1.navigator;\n/*\n * Player instance options, surfaced using options\n * options = Player.prototype.options_\n * Make changes in options, not here.\n *\n * @type {Object}\n * @private\n */\n\nPlayer.prototype.options_ = {\n  // Default order of fallback technology\n  techOrder: Tech.defaultTechOrder_,\n  html5: {},\n  // default inactivity timeout\n  inactivityTimeout: 2000,\n  // default playback rates\n  playbackRates: [],\n  // Add playback rate selection by adding rates\n  // 'playbackRates': [0.5, 1, 1.5, 2],\n  liveui: false,\n  // Included control sets\n  children: ['mediaLoader', 'posterImage', 'textTrackDisplay', 'loadingSpinner', 'bigPlayButton', 'liveTracker', 'controlBar', 'errorDisplay', 'textTrackSettings', 'resizeManager'],\n  language: navigator && (navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language) || 'en',\n  // locales and their language translations\n  languages: {},\n  // Default message to show when a video cannot be played.\n  notSupportedMessage: 'No compatible source was found for this media.',\n  normalizeAutoplay: false,\n  fullscreen: {\n    options: {\n      navigationUI: 'hide'\n    }\n  },\n  breakpoints: {},\n  responsive: false,\n  audioOnlyMode: false,\n  audioPosterMode: false\n};\n[\n/**\n * Returns whether or not the player is in the \"ended\" state.\n *\n * @return {Boolean} True if the player is in the ended state, false if not.\n * @method Player#ended\n */\n'ended',\n/**\n * Returns whether or not the player is in the \"seeking\" state.\n *\n * @return {Boolean} True if the player is in the seeking state, false if not.\n * @method Player#seeking\n */\n'seeking',\n/**\n * Returns the TimeRanges of the media that are currently available\n * for seeking to.\n *\n * @return {TimeRanges} the seekable intervals of the media timeline\n * @method Player#seekable\n */\n'seekable',\n/**\n * Returns the current state of network activity for the element, from\n * the codes in the list below.\n * - NETWORK_EMPTY (numeric value 0)\n *   The element has not yet been initialised. All attributes are in\n *   their initial states.\n * - NETWORK_IDLE (numeric value 1)\n *   The element's resource selection algorithm is active and has\n *   selected a resource, but it is not actually using the network at\n *   this time.\n * - NETWORK_LOADING (numeric value 2)\n *   The user agent is actively trying to download data.\n * - NETWORK_NO_SOURCE (numeric value 3)\n *   The element's resource selection algorithm is active, but it has\n *   not yet found a resource to use.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states\n * @return {number} the current network activity state\n * @method Player#networkState\n */\n'networkState',\n/**\n * Returns a value that expresses the current state of the element\n * with respect to rendering the current playback position, from the\n * codes in the list below.\n * - HAVE_NOTHING (numeric value 0)\n *   No information regarding the media resource is available.\n * - HAVE_METADATA (numeric value 1)\n *   Enough of the resource has been obtained that the duration of the\n *   resource is available.\n * - HAVE_CURRENT_DATA (numeric value 2)\n *   Data for the immediate current playback position is available.\n * - HAVE_FUTURE_DATA (numeric value 3)\n *   Data for the immediate current playback position is available, as\n *   well as enough data for the user agent to advance the current\n *   playback position in the direction of playback.\n * - HAVE_ENOUGH_DATA (numeric value 4)\n *   The user agent estimates that enough data is available for\n *   playback to proceed uninterrupted.\n *\n * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate\n * @return {number} the current playback rendering state\n * @method Player#readyState\n */\n'readyState'].forEach(function (fn) {\n  Player.prototype[fn] = function () {\n    return this.techGet_(fn);\n  };\n});\nTECH_EVENTS_RETRIGGER.forEach(function (event) {\n  Player.prototype[\"handleTech\" + toTitleCase$1(event) + \"_\"] = function () {\n    return this.trigger(event);\n  };\n});\n/**\n * Fired when the player has initial duration and dimension information\n *\n * @event Player#loadedmetadata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the player has downloaded data at the current playback position\n *\n * @event Player#loadeddata\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the current playback position has changed *\n * During playback this is fired every 15-250 milliseconds, depending on the\n * playback technology in use.\n *\n * @event Player#timeupdate\n * @type {EventTarget~Event}\n */\n\n/**\n * Fired when the volume changes\n *\n * @event Player#volumechange\n * @type {EventTarget~Event}\n */\n\n/**\n * Reports whether or not a player has a plugin available.\n *\n * This does not report whether or not the plugin has ever been initialized\n * on this player. For that, [usingPlugin]{@link Player#usingPlugin}.\n *\n * @method Player#hasPlugin\n * @param  {string}  name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player has the requested plugin available.\n */\n\n/**\n * Reports whether or not a player is using a plugin by name.\n *\n * For basic plugins, this only reports whether the plugin has _ever_ been\n * initialized on this player.\n *\n * @method Player#usingPlugin\n * @param  {string} name\n *         The name of a plugin.\n *\n * @return {boolean}\n *         Whether or not this player is using the requested plugin.\n */\n\nComponent$1.registerComponent('Player', Player);\n\n/**\n * The base plugin name.\n *\n * @private\n * @constant\n * @type {string}\n */\n\nvar BASE_PLUGIN_NAME = 'plugin';\n/**\n * The key on which a player's active plugins cache is stored.\n *\n * @private\n * @constant\n * @type     {string}\n */\n\nvar PLUGIN_CACHE_KEY = 'activePlugins_';\n/**\n * Stores registered plugins in a private space.\n *\n * @private\n * @type    {Object}\n */\n\nvar pluginStorage = {};\n/**\n * Reports whether or not a plugin has been registered.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {boolean}\n *          Whether or not the plugin has been registered.\n */\n\nvar pluginExists = function pluginExists(name) {\n  return pluginStorage.hasOwnProperty(name);\n};\n/**\n * Get a single registered plugin by name.\n *\n * @private\n * @param   {string} name\n *          The name of a plugin.\n *\n * @return {Function|undefined}\n *          The plugin (or undefined).\n */\n\n\nvar getPlugin = function getPlugin(name) {\n  return pluginExists(name) ? pluginStorage[name] : undefined;\n};\n/**\n * Marks a plugin as \"active\" on a player.\n *\n * Also, ensures that the player has an object for tracking active plugins.\n *\n * @private\n * @param   {Player} player\n *          A Video.js player instance.\n *\n * @param   {string} name\n *          The name of a plugin.\n */\n\n\nvar markPluginAsActive = function markPluginAsActive(player, name) {\n  player[PLUGIN_CACHE_KEY] = player[PLUGIN_CACHE_KEY] || {};\n  player[PLUGIN_CACHE_KEY][name] = true;\n};\n/**\n * Triggers a pair of plugin setup events.\n *\n * @private\n * @param  {Player} player\n *         A Video.js player instance.\n *\n * @param  {Plugin~PluginEventHash} hash\n *         A plugin event hash.\n *\n * @param  {boolean} [before]\n *         If true, prefixes the event name with \"before\". In other words,\n *         use this to trigger \"beforepluginsetup\" instead of \"pluginsetup\".\n */\n\n\nvar triggerSetupEvent = function triggerSetupEvent(player, hash, before) {\n  var eventName = (before ? 'before' : '') + 'pluginsetup';\n  player.trigger(eventName, hash);\n  player.trigger(eventName + ':' + hash.name, hash);\n};\n/**\n * Takes a basic plugin function and returns a wrapper function which marks\n * on the player that the plugin has been activated.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Function} plugin\n *          The basic plugin.\n *\n * @return {Function}\n *          A wrapper function for the given plugin.\n */\n\n\nvar createBasicPlugin = function createBasicPlugin(name, plugin) {\n  var basicPluginWrapper = function basicPluginWrapper() {\n    // We trigger the \"beforepluginsetup\" and \"pluginsetup\" events on the player\n    // regardless, but we want the hash to be consistent with the hash provided\n    // for advanced plugins.\n    //\n    // The only potentially counter-intuitive thing here is the `instance` in\n    // the \"pluginsetup\" event is the value returned by the `plugin` function.\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: null\n    }, true);\n    var instance = plugin.apply(this, arguments);\n    markPluginAsActive(this, name);\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: plugin,\n      instance: instance\n    });\n    return instance;\n  };\n\n  Object.keys(plugin).forEach(function (prop) {\n    basicPluginWrapper[prop] = plugin[prop];\n  });\n  return basicPluginWrapper;\n};\n/**\n * Takes a plugin sub-class and returns a factory function for generating\n * instances of it.\n *\n * This factory function will replace itself with an instance of the requested\n * sub-class of Plugin.\n *\n * @private\n * @param   {string} name\n *          The name of the plugin.\n *\n * @param   {Plugin} PluginSubClass\n *          The advanced plugin.\n *\n * @return {Function}\n */\n\n\nvar createPluginFactory = function createPluginFactory(name, PluginSubClass) {\n  // Add a `name` property to the plugin prototype so that each plugin can\n  // refer to itself by name.\n  PluginSubClass.prototype.name = name;\n  return function () {\n    triggerSetupEvent(this, {\n      name: name,\n      plugin: PluginSubClass,\n      instance: null\n    }, true);\n\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    var instance = _construct(PluginSubClass, [this].concat(args)); // The plugin is replaced by a function that returns the current instance.\n\n\n    this[name] = function () {\n      return instance;\n    };\n\n    triggerSetupEvent(this, instance.getEventHash());\n    return instance;\n  };\n};\n/**\n * Parent class for all advanced plugins.\n *\n * @mixes   module:evented~EventedMixin\n * @mixes   module:stateful~StatefulMixin\n * @fires   Player#beforepluginsetup\n * @fires   Player#beforepluginsetup:$name\n * @fires   Player#pluginsetup\n * @fires   Player#pluginsetup:$name\n * @listens Player#dispose\n * @throws  {Error}\n *          If attempting to instantiate the base {@link Plugin} class\n *          directly instead of via a sub-class.\n */\n\n\nvar Plugin = /*#__PURE__*/function () {\n  /**\n   * Creates an instance of this class.\n   *\n   * Sub-classes should call `super` to ensure plugins are properly initialized.\n   *\n   * @param {Player} player\n   *        A Video.js player instance.\n   */\n  function Plugin(player) {\n    if (this.constructor === Plugin) {\n      throw new Error('Plugin must be sub-classed; not directly instantiated.');\n    }\n\n    this.player = player;\n\n    if (!this.log) {\n      this.log = this.player.log.createLogger(this.name);\n    } // Make this object evented, but remove the added `trigger` method so we\n    // use the prototype version instead.\n\n\n    evented(this);\n    delete this.trigger;\n    stateful(this, this.constructor.defaultState);\n    markPluginAsActive(player, this.name); // Auto-bind the dispose method so we can use it as a listener and unbind\n    // it later easily.\n\n    this.dispose = this.dispose.bind(this); // If the player is disposed, dispose the plugin.\n\n    player.on('dispose', this.dispose);\n  }\n  /**\n   * Get the version of the plugin that was set on <pluginName>.VERSION\n   */\n\n\n  var _proto = Plugin.prototype;\n\n  _proto.version = function version() {\n    return this.constructor.VERSION;\n  }\n  /**\n   * Each event triggered by plugins includes a hash of additional data with\n   * conventional properties.\n   *\n   * This returns that object or mutates an existing hash.\n   *\n   * @param   {Object} [hash={}]\n   *          An object to be used as event an event hash.\n   *\n   * @return {Plugin~PluginEventHash}\n   *          An event hash object with provided properties mixed-in.\n   */\n  ;\n\n  _proto.getEventHash = function getEventHash(hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    hash.name = this.name;\n    hash.plugin = this.constructor;\n    hash.instance = this;\n    return hash;\n  }\n  /**\n   * Triggers an event on the plugin object and overrides\n   * {@link module:evented~EventedMixin.trigger|EventedMixin.trigger}.\n   *\n   * @param   {string|Object} event\n   *          An event type or an object with a type property.\n   *\n   * @param   {Object} [hash={}]\n   *          Additional data hash to merge with a\n   *          {@link Plugin~PluginEventHash|PluginEventHash}.\n   *\n   * @return {boolean}\n   *          Whether or not default was prevented.\n   */\n  ;\n\n  _proto.trigger = function trigger$1(event, hash) {\n    if (hash === void 0) {\n      hash = {};\n    }\n\n    return trigger(this.eventBusEl_, event, this.getEventHash(hash));\n  }\n  /**\n   * Handles \"statechanged\" events on the plugin. No-op by default, override by\n   * subclassing.\n   *\n   * @abstract\n   * @param    {Event} e\n   *           An event object provided by a \"statechanged\" event.\n   *\n   * @param    {Object} e.changes\n   *           An object describing changes that occurred with the \"statechanged\"\n   *           event.\n   */\n  ;\n\n  _proto.handleStateChanged = function handleStateChanged(e) {}\n  /**\n   * Disposes a plugin.\n   *\n   * Subclasses can override this if they want, but for the sake of safety,\n   * it's probably best to subscribe the \"dispose\" event.\n   *\n   * @fires Plugin#dispose\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var name = this.name,\n        player = this.player;\n    /**\n     * Signals that a advanced plugin is about to be disposed.\n     *\n     * @event Plugin#dispose\n     * @type  {EventTarget~Event}\n     */\n\n    this.trigger('dispose');\n    this.off();\n    player.off('dispose', this.dispose); // Eliminate any possible sources of leaking memory by clearing up\n    // references between the player and the plugin instance and nulling out\n    // the plugin's state and replacing methods with a function that throws.\n\n    player[PLUGIN_CACHE_KEY][name] = false;\n    this.player = this.state = null; // Finally, replace the plugin name on the player with a new factory\n    // function, so that the plugin is ready to be set up again.\n\n    player[name] = createPluginFactory(name, pluginStorage[name]);\n  }\n  /**\n   * Determines if a plugin is a basic plugin (i.e. not a sub-class of `Plugin`).\n   *\n   * @param   {string|Function} plugin\n   *          If a string, matches the name of a plugin. If a function, will be\n   *          tested directly.\n   *\n   * @return {boolean}\n   *          Whether or not a plugin is a basic plugin.\n   */\n  ;\n\n  Plugin.isBasic = function isBasic(plugin) {\n    var p = typeof plugin === 'string' ? getPlugin(plugin) : plugin;\n    return typeof p === 'function' && !Plugin.prototype.isPrototypeOf(p.prototype);\n  }\n  /**\n   * Register a Video.js plugin.\n   *\n   * @param   {string} name\n   *          The name of the plugin to be registered. Must be a string and\n   *          must not match an existing plugin or a method on the `Player`\n   *          prototype.\n   *\n   * @param   {Function} plugin\n   *          A sub-class of `Plugin` or a function for basic plugins.\n   *\n   * @return {Function}\n   *          For advanced plugins, a factory function for that plugin. For\n   *          basic plugins, a wrapper function that initializes the plugin.\n   */\n  ;\n\n  Plugin.registerPlugin = function registerPlugin(name, plugin) {\n    if (typeof name !== 'string') {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", must be a string, was \" + typeof name + \".\");\n    }\n\n    if (pluginExists(name)) {\n      log$1.warn(\"A plugin named \\\"\" + name + \"\\\" already exists. You may want to avoid re-registering plugins!\");\n    } else if (Player.prototype.hasOwnProperty(name)) {\n      throw new Error(\"Illegal plugin name, \\\"\" + name + \"\\\", cannot share a name with an existing player method!\");\n    }\n\n    if (typeof plugin !== 'function') {\n      throw new Error(\"Illegal plugin for \\\"\" + name + \"\\\", must be a function, was \" + typeof plugin + \".\");\n    }\n\n    pluginStorage[name] = plugin; // Add a player prototype method for all sub-classed plugins (but not for\n    // the base Plugin class).\n\n    if (name !== BASE_PLUGIN_NAME) {\n      if (Plugin.isBasic(plugin)) {\n        Player.prototype[name] = createBasicPlugin(name, plugin);\n      } else {\n        Player.prototype[name] = createPluginFactory(name, plugin);\n      }\n    }\n\n    return plugin;\n  }\n  /**\n   * De-register a Video.js plugin.\n   *\n   * @param  {string} name\n   *         The name of the plugin to be de-registered. Must be a string that\n   *         matches an existing plugin.\n   *\n   * @throws {Error}\n   *         If an attempt is made to de-register the base plugin.\n   */\n  ;\n\n  Plugin.deregisterPlugin = function deregisterPlugin(name) {\n    if (name === BASE_PLUGIN_NAME) {\n      throw new Error('Cannot de-register base plugin.');\n    }\n\n    if (pluginExists(name)) {\n      delete pluginStorage[name];\n      delete Player.prototype[name];\n    }\n  }\n  /**\n   * Gets an object containing multiple Video.js plugins.\n   *\n   * @param   {Array} [names]\n   *          If provided, should be an array of plugin names. Defaults to _all_\n   *          plugin names.\n   *\n   * @return {Object|undefined}\n   *          An object containing plugin(s) associated with their name(s) or\n   *          `undefined` if no matching plugins exist).\n   */\n  ;\n\n  Plugin.getPlugins = function getPlugins(names) {\n    if (names === void 0) {\n      names = Object.keys(pluginStorage);\n    }\n\n    var result;\n    names.forEach(function (name) {\n      var plugin = getPlugin(name);\n\n      if (plugin) {\n        result = result || {};\n        result[name] = plugin;\n      }\n    });\n    return result;\n  }\n  /**\n   * Gets a plugin's version, if available\n   *\n   * @param   {string} name\n   *          The name of a plugin.\n   *\n   * @return {string}\n   *          The plugin's version or an empty string.\n   */\n  ;\n\n  Plugin.getPluginVersion = function getPluginVersion(name) {\n    var plugin = getPlugin(name);\n    return plugin && plugin.VERSION || '';\n  };\n\n  return Plugin;\n}();\n/**\n * Gets a plugin by name if it exists.\n *\n * @static\n * @method   getPlugin\n * @memberOf Plugin\n * @param    {string} name\n *           The name of a plugin.\n *\n * @returns  {Function|undefined}\n *           The plugin (or `undefined`).\n */\n\n\nPlugin.getPlugin = getPlugin;\n/**\n * The name of the base plugin class as it is registered.\n *\n * @type {string}\n */\n\nPlugin.BASE_PLUGIN_NAME = BASE_PLUGIN_NAME;\nPlugin.registerPlugin(BASE_PLUGIN_NAME, Plugin);\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\nPlayer.prototype.usingPlugin = function (name) {\n  return !!this[PLUGIN_CACHE_KEY] && this[PLUGIN_CACHE_KEY][name] === true;\n};\n/**\n * Documented in player.js\n *\n * @ignore\n */\n\n\nPlayer.prototype.hasPlugin = function (name) {\n  return !!pluginExists(name);\n};\n/**\n * Signals that a plugin is about to be set up on a player.\n *\n * @event    Player#beforepluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin is about to be set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#beforepluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player.\n *\n * @event    Player#pluginsetup\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * Signals that a plugin has just been set up on a player - by name. The name\n * is the name of the plugin.\n *\n * @event    Player#pluginsetup:$name\n * @type     {Plugin~PluginEventHash}\n */\n\n/**\n * @typedef  {Object} Plugin~PluginEventHash\n *\n * @property {string} instance\n *           For basic plugins, the return value of the plugin function. For\n *           advanced plugins, the plugin instance on which the event is fired.\n *\n * @property {string} name\n *           The name of the plugin.\n *\n * @property {string} plugin\n *           For basic plugins, the plugin function. For advanced plugins, the\n *           plugin class/constructor.\n */\n\n/**\n * @file extend.js\n * @module extend\n */\nvar hasLogged = false;\n/**\n * Used to subclass an existing class by emulating ES subclassing using the\n * `extends` keyword.\n *\n * @function\n * @deprecated\n * @example\n * var MyComponent = videojs.extend(videojs.getComponent('Component'), {\n *   myCustomMethod: function() {\n *     // Do things in my method.\n *   }\n * });\n *\n * @param    {Function} superClass\n *           The class to inherit from\n *\n * @param    {Object}   [subClassMethods={}]\n *           Methods of the new class\n *\n * @return   {Function}\n *           The new class with subClassMethods that inherited superClass.\n */\n\nvar extend = function extend(superClass, subClassMethods) {\n  if (subClassMethods === void 0) {\n    subClassMethods = {};\n  }\n\n  // Log a warning the first time extend is called to note that it is deprecated\n  // It was previously deprecated in our documentation (guides, specifically),\n  // but was never formally deprecated in code.\n  if (!hasLogged) {\n    log$1.warn('videojs.extend is deprecated as of Video.js 7.22.0 and will be removed in Video.js 8.0.0');\n    hasLogged = true;\n  }\n\n  var subClass = function subClass() {\n    superClass.apply(this, arguments);\n  };\n\n  var methods = {};\n\n  if (typeof subClassMethods === 'object') {\n    if (subClassMethods.constructor !== Object.prototype.constructor) {\n      subClass = subClassMethods.constructor;\n    }\n\n    methods = subClassMethods;\n  } else if (typeof subClassMethods === 'function') {\n    subClass = subClassMethods;\n  }\n\n  _inherits(subClass, superClass); // this is needed for backward-compatibility and node compatibility.\n\n\n  if (superClass) {\n    subClass.super_ = superClass;\n  } // Extend subObj's prototype with functions and other properties from props\n\n\n  for (var name in methods) {\n    if (methods.hasOwnProperty(name)) {\n      subClass.prototype[name] = methods[name];\n    }\n  }\n\n  return subClass;\n};\n\n/**\n * @file video.js\n * @module videojs\n */\n/**\n * Normalize an `id` value by trimming off a leading `#`\n *\n * @private\n * @param   {string} id\n *          A string, maybe with a leading `#`.\n *\n * @return {string}\n *          The string, without any leading `#`.\n */\n\nvar normalizeId = function normalizeId(id) {\n  return id.indexOf('#') === 0 ? id.slice(1) : id;\n};\n/**\n * The `videojs()` function doubles as the main function for users to create a\n * {@link Player} instance as well as the main library namespace.\n *\n * It can also be used as a getter for a pre-existing {@link Player} instance.\n * However, we _strongly_ recommend using `videojs.getPlayer()` for this\n * purpose because it avoids any potential for unintended initialization.\n *\n * Due to [limitations](https://github.com/jsdoc3/jsdoc/issues/955#issuecomment-313829149)\n * of our JSDoc template, we cannot properly document this as both a function\n * and a namespace, so its function signature is documented here.\n *\n * #### Arguments\n * ##### id\n * string|Element, **required**\n *\n * Video element or video element ID.\n *\n * ##### options\n * Object, optional\n *\n * Options object for providing settings.\n * See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * ##### ready\n * {@link Component~ReadyCallback}, optional\n *\n * A function to be called when the {@link Player} and {@link Tech} are ready.\n *\n * #### Return Value\n *\n * The `videojs()` function returns a {@link Player} instance.\n *\n * @namespace\n *\n * @borrows AudioTrack as AudioTrack\n * @borrows Component.getComponent as getComponent\n * @borrows module:computed-style~computedStyle as computedStyle\n * @borrows module:events.on as on\n * @borrows module:events.one as one\n * @borrows module:events.off as off\n * @borrows module:events.trigger as trigger\n * @borrows EventTarget as EventTarget\n * @borrows module:extend~extend as extend\n * @borrows module:fn.bind as bind\n * @borrows module:format-time.formatTime as formatTime\n * @borrows module:format-time.resetFormatTime as resetFormatTime\n * @borrows module:format-time.setFormatTime as setFormatTime\n * @borrows module:merge-options.mergeOptions as mergeOptions\n * @borrows module:middleware.use as use\n * @borrows Player.players as players\n * @borrows Plugin.registerPlugin as registerPlugin\n * @borrows Plugin.deregisterPlugin as deregisterPlugin\n * @borrows Plugin.getPlugins as getPlugins\n * @borrows Plugin.getPlugin as getPlugin\n * @borrows Plugin.getPluginVersion as getPluginVersion\n * @borrows Tech.getTech as getTech\n * @borrows Tech.registerTech as registerTech\n * @borrows TextTrack as TextTrack\n * @borrows module:time-ranges.createTimeRanges as createTimeRange\n * @borrows module:time-ranges.createTimeRanges as createTimeRanges\n * @borrows module:url.isCrossOrigin as isCrossOrigin\n * @borrows module:url.parseUrl as parseUrl\n * @borrows VideoTrack as VideoTrack\n *\n * @param  {string|Element} id\n *         Video element or video element ID.\n *\n * @param  {Object} [options]\n *         Options object for providing settings.\n *         See: [Options Guide](https://docs.videojs.com/tutorial-options.html).\n *\n * @param  {Component~ReadyCallback} [ready]\n *         A function to be called when the {@link Player} and {@link Tech} are\n *         ready.\n *\n * @return {Player}\n *         The `videojs()` function returns a {@link Player|Player} instance.\n */\n\n\nfunction videojs(id, options, ready) {\n  var player = videojs.getPlayer(id);\n\n  if (player) {\n    if (options) {\n      log$1.warn(\"Player \\\"\" + id + \"\\\" is already initialised. Options will not be applied.\");\n    }\n\n    if (ready) {\n      player.ready(ready);\n    }\n\n    return player;\n  }\n\n  var el = typeof id === 'string' ? $('#' + normalizeId(id)) : id;\n\n  if (!isEl(el)) {\n    throw new TypeError('The element or ID supplied is not valid. (videojs)');\n  } // document.body.contains(el) will only check if el is contained within that one document.\n  // This causes problems for elements in iframes.\n  // Instead, use the element's ownerDocument instead of the global document.\n  // This will make sure that the element is indeed in the dom of that document.\n  // Additionally, check that the document in question has a default view.\n  // If the document is no longer attached to the dom, the defaultView of the document will be null.\n\n\n  if (!el.ownerDocument.defaultView || !el.ownerDocument.body.contains(el)) {\n    log$1.warn('The element supplied is not included in the DOM');\n  }\n\n  options = options || {}; // Store a copy of the el before modification, if it is to be restored in destroy()\n  // If div ingest, store the parent div\n\n  if (options.restoreEl === true) {\n    options.restoreEl = (el.parentNode && el.parentNode.hasAttribute('data-vjs-player') ? el.parentNode : el).cloneNode(true);\n  }\n\n  hooks('beforesetup').forEach(function (hookFunction) {\n    var opts = hookFunction(el, mergeOptions$3(options));\n\n    if (!isObject(opts) || Array.isArray(opts)) {\n      log$1.error('please return an object in beforesetup hooks');\n      return;\n    }\n\n    options = mergeOptions$3(options, opts);\n  }); // We get the current \"Player\" component here in case an integration has\n  // replaced it with a custom player.\n\n  var PlayerComponent = Component$1.getComponent('Player');\n  player = new PlayerComponent(el, options, ready);\n  hooks('setup').forEach(function (hookFunction) {\n    return hookFunction(player);\n  });\n  return player;\n}\n\nvideojs.hooks_ = hooks_;\nvideojs.hooks = hooks;\nvideojs.hook = hook;\nvideojs.hookOnce = hookOnce;\nvideojs.removeHook = removeHook; // Add default styles\n\nif (window$1.VIDEOJS_NO_DYNAMIC_STYLE !== true && isReal()) {\n  var style = $('.vjs-styles-defaults');\n\n  if (!style) {\n    style = createStyleElement('vjs-styles-defaults');\n    var head = $('head');\n\n    if (head) {\n      head.insertBefore(style, head.firstChild);\n    }\n\n    setTextContent(style, \"\\n      .video-js {\\n        width: 300px;\\n        height: 150px;\\n      }\\n\\n      .vjs-fluid:not(.vjs-audio-only-mode) {\\n        padding-top: 56.25%\\n      }\\n    \");\n  }\n} // Run Auto-load players\n// You have to wait at least once in case this script is loaded after your\n// video in the DOM (weird behavior only with minified version)\n\n\nautoSetupTimeout(1, videojs);\n/**\n * Current Video.js version. Follows [semantic versioning](https://semver.org/).\n *\n * @type {string}\n */\n\nvideojs.VERSION = version$5;\n/**\n * The global options object. These are the settings that take effect\n * if no overrides are specified when the player is created.\n *\n * @type {Object}\n */\n\nvideojs.options = Player.prototype.options_;\n/**\n * Get an object with the currently created players, keyed by player ID\n *\n * @return {Object}\n *         The created players\n */\n\nvideojs.getPlayers = function () {\n  return Player.players;\n};\n/**\n * Get a single player based on an ID or DOM element.\n *\n * This is useful if you want to check if an element or ID has an associated\n * Video.js player, but not create one if it doesn't.\n *\n * @param   {string|Element} id\n *          An HTML element - `<video>`, `<audio>`, or `<video-js>` -\n *          or a string matching the `id` of such an element.\n *\n * @return {Player|undefined}\n *          A player instance or `undefined` if there is no player instance\n *          matching the argument.\n */\n\n\nvideojs.getPlayer = function (id) {\n  var players = Player.players;\n  var tag;\n\n  if (typeof id === 'string') {\n    var nId = normalizeId(id);\n    var player = players[nId];\n\n    if (player) {\n      return player;\n    }\n\n    tag = $('#' + nId);\n  } else {\n    tag = id;\n  }\n\n  if (isEl(tag)) {\n    var _tag = tag,\n        _player = _tag.player,\n        playerId = _tag.playerId; // Element may have a `player` property referring to an already created\n    // player instance. If so, return that.\n\n    if (_player || players[playerId]) {\n      return _player || players[playerId];\n    }\n  }\n};\n/**\n * Returns an array of all current players.\n *\n * @return {Array}\n *         An array of all players. The array will be in the order that\n *         `Object.keys` provides, which could potentially vary between\n *         JavaScript engines.\n *\n */\n\n\nvideojs.getAllPlayers = function () {\n  return (// Disposed players leave a key with a `null` value, so we need to make sure\n    // we filter those out.\n    Object.keys(Player.players).map(function (k) {\n      return Player.players[k];\n    }).filter(Boolean)\n  );\n};\n\nvideojs.players = Player.players;\nvideojs.getComponent = Component$1.getComponent;\n/**\n * Register a component so it can referred to by name. Used when adding to other\n * components, either through addChild `component.addChild('myComponent')` or through\n * default children options  `{ children: ['myComponent'] }`.\n *\n * > NOTE: You could also just initialize the component before adding.\n * `component.addChild(new MyComponent());`\n *\n * @param {string} name\n *        The class name of the component\n *\n * @param {Component} comp\n *        The component class\n *\n * @return {Component}\n *         The newly registered component\n */\n\nvideojs.registerComponent = function (name, comp) {\n  if (Tech.isTech(comp)) {\n    log$1.warn(\"The \" + name + \" tech was registered as a component. It should instead be registered using videojs.registerTech(name, tech)\");\n  }\n\n  Component$1.registerComponent.call(Component$1, name, comp);\n};\n\nvideojs.getTech = Tech.getTech;\nvideojs.registerTech = Tech.registerTech;\nvideojs.use = use;\n/**\n * An object that can be returned by a middleware to signify\n * that the middleware is being terminated.\n *\n * @type {object}\n * @property {object} middleware.TERMINATOR\n */\n\nObject.defineProperty(videojs, 'middleware', {\n  value: {},\n  writeable: false,\n  enumerable: true\n});\nObject.defineProperty(videojs.middleware, 'TERMINATOR', {\n  value: TERMINATOR,\n  writeable: false,\n  enumerable: true\n});\n/**\n * A reference to the {@link module:browser|browser utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:browser|browser}\n */\n\nvideojs.browser = browser;\n/**\n * Use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED} instead; only\n * included for backward-compatibility with 4.x.\n *\n * @deprecated Since version 5.0, use {@link module:browser.TOUCH_ENABLED|browser.TOUCH_ENABLED instead.\n * @type {boolean}\n */\n\nvideojs.TOUCH_ENABLED = TOUCH_ENABLED;\nvideojs.extend = extend;\nvideojs.mergeOptions = mergeOptions$3;\nvideojs.bind = bind;\nvideojs.registerPlugin = Plugin.registerPlugin;\nvideojs.deregisterPlugin = Plugin.deregisterPlugin;\n/**\n * Deprecated method to register a plugin with Video.js\n *\n * @deprecated videojs.plugin() is deprecated; use videojs.registerPlugin() instead\n *\n * @param {string} name\n *        The plugin name\n *\n * @param {Plugin|Function} plugin\n *         The plugin sub-class or function\n */\n\nvideojs.plugin = function (name, plugin) {\n  log$1.warn('videojs.plugin() is deprecated; use videojs.registerPlugin() instead');\n  return Plugin.registerPlugin(name, plugin);\n};\n\nvideojs.getPlugins = Plugin.getPlugins;\nvideojs.getPlugin = Plugin.getPlugin;\nvideojs.getPluginVersion = Plugin.getPluginVersion;\n/**\n * Adding languages so that they're available to all players.\n * Example: `videojs.addLanguage('es', { 'Hello': 'Hola' });`\n *\n * @param {string} code\n *        The language code or dictionary property\n *\n * @param {Object} data\n *        The data values to be translated\n *\n * @return {Object}\n *         The resulting language dictionary object\n */\n\nvideojs.addLanguage = function (code, data) {\n  var _mergeOptions;\n\n  code = ('' + code).toLowerCase();\n  videojs.options.languages = mergeOptions$3(videojs.options.languages, (_mergeOptions = {}, _mergeOptions[code] = data, _mergeOptions));\n  return videojs.options.languages[code];\n};\n/**\n * A reference to the {@link module:log|log utility module} as an object.\n *\n * @type {Function}\n * @see  {@link module:log|log}\n */\n\n\nvideojs.log = log$1;\nvideojs.createLogger = createLogger;\nvideojs.createTimeRange = videojs.createTimeRanges = createTimeRanges;\nvideojs.formatTime = formatTime;\nvideojs.setFormatTime = setFormatTime;\nvideojs.resetFormatTime = resetFormatTime;\nvideojs.parseUrl = parseUrl;\nvideojs.isCrossOrigin = isCrossOrigin;\nvideojs.EventTarget = EventTarget$2;\nvideojs.on = on;\nvideojs.one = one;\nvideojs.off = off;\nvideojs.trigger = trigger;\n/**\n * A cross-browser XMLHttpRequest wrapper.\n *\n * @function\n * @param    {Object} options\n *           Settings for the request.\n *\n * @return   {XMLHttpRequest|XDomainRequest}\n *           The request object.\n *\n * @see      https://github.com/Raynos/xhr\n */\n\nvideojs.xhr = XHR;\nvideojs.TextTrack = TextTrack;\nvideojs.AudioTrack = AudioTrack;\nvideojs.VideoTrack = VideoTrack;\n['isEl', 'isTextNode', 'createEl', 'hasClass', 'addClass', 'removeClass', 'toggleClass', 'setAttributes', 'getAttributes', 'emptyEl', 'appendContent', 'insertContent'].forEach(function (k) {\n  videojs[k] = function () {\n    log$1.warn(\"videojs.\" + k + \"() is deprecated; use videojs.dom.\" + k + \"() instead\");\n    return Dom[k].apply(null, arguments);\n  };\n});\nvideojs.computedStyle = computedStyle;\n/**\n * A reference to the {@link module:dom|DOM utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:dom|dom}\n */\n\nvideojs.dom = Dom;\n/**\n * A reference to the {@link module:url|URL utility module} as an object.\n *\n * @type {Object}\n * @see  {@link module:url|url}\n */\n\nvideojs.url = Url;\nvideojs.defineLazyProperty = defineLazyProperty; // Adding less ambiguous text for fullscreen button.\n// In a major update this could become the default text and key.\n\nvideojs.addLanguage('en', {\n  'Non-Fullscreen': 'Exit Fullscreen'\n});\n\n/*! @name @videojs/http-streaming @version 2.16.2 @license Apache-2.0 */\n/**\n * @file resolve-url.js - Handling how URLs are resolved and manipulated\n */\n\nvar resolveUrl = _resolveUrl;\n/**\n * Checks whether xhr request was redirected and returns correct url depending\n * on `handleManifestRedirects` option\n *\n * @api private\n *\n * @param  {string} url - an url being requested\n * @param  {XMLHttpRequest} req - xhr request result\n *\n * @return {string}\n */\n\nvar resolveManifestRedirect = function resolveManifestRedirect(handleManifestRedirect, url, req) {\n  // To understand how the responseURL below is set and generated:\n  // - https://fetch.spec.whatwg.org/#concept-response-url\n  // - https://fetch.spec.whatwg.org/#atomic-http-redirect-handling\n  if (handleManifestRedirect && req && req.responseURL && url !== req.responseURL) {\n    return req.responseURL;\n  }\n\n  return url;\n};\n\nvar logger = function logger(source) {\n  if (videojs.log.debug) {\n    return videojs.log.debug.bind(videojs, 'VHS:', source + \" >\");\n  }\n\n  return function () {};\n};\n/**\n * ranges\n *\n * Utilities for working with TimeRanges.\n *\n */\n\n\nvar TIME_FUDGE_FACTOR = 1 / 30; // Comparisons between time values such as current time and the end of the buffered range\n// can be misleading because of precision differences or when the current media has poorly\n// aligned audio and video, which can cause values to be slightly off from what you would\n// expect. This value is what we consider to be safe to use in such comparisons to account\n// for these scenarios.\n\nvar SAFE_TIME_DELTA = TIME_FUDGE_FACTOR * 3;\n\nvar filterRanges = function filterRanges(timeRanges, predicate) {\n  var results = [];\n  var i;\n\n  if (timeRanges && timeRanges.length) {\n    // Search for ranges that match the predicate\n    for (i = 0; i < timeRanges.length; i++) {\n      if (predicate(timeRanges.start(i), timeRanges.end(i))) {\n        results.push([timeRanges.start(i), timeRanges.end(i)]);\n      }\n    }\n  }\n\n  return videojs.createTimeRanges(results);\n};\n/**\n * Attempts to find the buffered TimeRange that contains the specified\n * time.\n *\n * @param {TimeRanges} buffered - the TimeRanges object to query\n * @param {number} time  - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object\n */\n\n\nvar findRange = function findRange(buffered, time) {\n  return filterRanges(buffered, function (start, end) {\n    return start - SAFE_TIME_DELTA <= time && end + SAFE_TIME_DELTA >= time;\n  });\n};\n/**\n * Returns the TimeRanges that begin later than the specified time.\n *\n * @param {TimeRanges} timeRanges - the TimeRanges object to query\n * @param {number} time - the time to filter on.\n * @return {TimeRanges} a new TimeRanges object.\n */\n\n\nvar findNextRange = function findNextRange(timeRanges, time) {\n  return filterRanges(timeRanges, function (start) {\n    return start - TIME_FUDGE_FACTOR >= time;\n  });\n};\n/**\n * Returns gaps within a list of TimeRanges\n *\n * @param {TimeRanges} buffered - the TimeRanges object\n * @return {TimeRanges} a TimeRanges object of gaps\n */\n\n\nvar findGaps = function findGaps(buffered) {\n  if (buffered.length < 2) {\n    return videojs.createTimeRanges();\n  }\n\n  var ranges = [];\n\n  for (var i = 1; i < buffered.length; i++) {\n    var start = buffered.end(i - 1);\n    var end = buffered.start(i);\n    ranges.push([start, end]);\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Calculate the intersection of two TimeRanges\n *\n * @param {TimeRanges} bufferA\n * @param {TimeRanges} bufferB\n * @return {TimeRanges} The interesection of `bufferA` with `bufferB`\n */\n\n\nvar bufferIntersection = function bufferIntersection(bufferA, bufferB) {\n  var start = null;\n  var end = null;\n  var arity = 0;\n  var extents = [];\n  var ranges = [];\n\n  if (!bufferA || !bufferA.length || !bufferB || !bufferB.length) {\n    return videojs.createTimeRange();\n  } // Handle the case where we have both buffers and create an\n  // intersection of the two\n\n\n  var count = bufferA.length; // A) Gather up all start and end times\n\n  while (count--) {\n    extents.push({\n      time: bufferA.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferA.end(count),\n      type: 'end'\n    });\n  }\n\n  count = bufferB.length;\n\n  while (count--) {\n    extents.push({\n      time: bufferB.start(count),\n      type: 'start'\n    });\n    extents.push({\n      time: bufferB.end(count),\n      type: 'end'\n    });\n  } // B) Sort them by time\n\n\n  extents.sort(function (a, b) {\n    return a.time - b.time;\n  }); // C) Go along one by one incrementing arity for start and decrementing\n  //    arity for ends\n\n  for (count = 0; count < extents.length; count++) {\n    if (extents[count].type === 'start') {\n      arity++; // D) If arity is ever incremented to 2 we are entering an\n      //    overlapping range\n\n      if (arity === 2) {\n        start = extents[count].time;\n      }\n    } else if (extents[count].type === 'end') {\n      arity--; // E) If arity is ever decremented to 1 we leaving an\n      //    overlapping range\n\n      if (arity === 1) {\n        end = extents[count].time;\n      }\n    } // F) Record overlapping ranges\n\n\n    if (start !== null && end !== null) {\n      ranges.push([start, end]);\n      start = null;\n      end = null;\n    }\n  }\n\n  return videojs.createTimeRanges(ranges);\n};\n/**\n * Gets a human readable string for a TimeRange\n *\n * @param {TimeRange} range\n * @return {string} a human readable string\n */\n\n\nvar printableRange = function printableRange(range) {\n  var strArr = [];\n\n  if (!range || !range.length) {\n    return '';\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    strArr.push(range.start(i) + ' => ' + range.end(i));\n  }\n\n  return strArr.join(', ');\n};\n/**\n * Calculates the amount of time left in seconds until the player hits the end of the\n * buffer and causes a rebuffer\n *\n * @param {TimeRange} buffered\n *        The state of the buffer\n * @param {Numnber} currentTime\n *        The current time of the player\n * @param {number} playbackRate\n *        The current playback rate of the player. Defaults to 1.\n * @return {number}\n *         Time until the player has to start rebuffering in seconds.\n * @function timeUntilRebuffer\n */\n\n\nvar timeUntilRebuffer = function timeUntilRebuffer(buffered, currentTime, playbackRate) {\n  if (playbackRate === void 0) {\n    playbackRate = 1;\n  }\n\n  var bufferedEnd = buffered.length ? buffered.end(buffered.length - 1) : 0;\n  return (bufferedEnd - currentTime) / playbackRate;\n};\n/**\n * Converts a TimeRanges object into an array representation\n *\n * @param {TimeRanges} timeRanges\n * @return {Array}\n */\n\n\nvar timeRangesToArray = function timeRangesToArray(timeRanges) {\n  var timeRangesList = [];\n\n  for (var i = 0; i < timeRanges.length; i++) {\n    timeRangesList.push({\n      start: timeRanges.start(i),\n      end: timeRanges.end(i)\n    });\n  }\n\n  return timeRangesList;\n};\n/**\n * Determines if two time range objects are different.\n *\n * @param {TimeRange} a\n *        the first time range object to check\n *\n * @param {TimeRange} b\n *        the second time range object to check\n *\n * @return {Boolean}\n *         Whether the time range objects differ\n */\n\n\nvar isRangeDifferent = function isRangeDifferent(a, b) {\n  // same object\n  if (a === b) {\n    return false;\n  } // one or the other is undefined\n\n\n  if (!a && b || !b && a) {\n    return true;\n  } // length is different\n\n\n  if (a.length !== b.length) {\n    return true;\n  } // see if any start/end pair is different\n\n\n  for (var i = 0; i < a.length; i++) {\n    if (a.start(i) !== b.start(i) || a.end(i) !== b.end(i)) {\n      return true;\n    }\n  } // if the length and every pair is the same\n  // this is the same time range\n\n\n  return false;\n};\n\nvar lastBufferedEnd = function lastBufferedEnd(a) {\n  if (!a || !a.length || !a.end) {\n    return;\n  }\n\n  return a.end(a.length - 1);\n};\n/**\n * A utility function to add up the amount of time in a timeRange\n * after a specified startTime.\n * ie:[[0, 10], [20, 40], [50, 60]] with a startTime 0\n *     would return 40 as there are 40s seconds after 0 in the timeRange\n *\n * @param {TimeRange} range\n *        The range to check against\n * @param {number} startTime\n *        The time in the time range that you should start counting from\n *\n * @return {number}\n *          The number of seconds in the buffer passed the specified time.\n */\n\n\nvar timeAheadOf = function timeAheadOf(range, startTime) {\n  var time = 0;\n\n  if (!range || !range.length) {\n    return time;\n  }\n\n  for (var i = 0; i < range.length; i++) {\n    var start = range.start(i);\n    var end = range.end(i); // startTime is after this range entirely\n\n    if (startTime > end) {\n      continue;\n    } // startTime is within this range\n\n\n    if (startTime > start && startTime <= end) {\n      time += end - startTime;\n      continue;\n    } // startTime is before this range.\n\n\n    time += end - start;\n  }\n\n  return time;\n};\n/**\n * @file playlist.js\n *\n * Playlist related utilities.\n */\n\n\nvar createTimeRange = videojs.createTimeRange;\n/**\n * Get the duration of a segment, with special cases for\n * llhls segments that do not have a duration yet.\n *\n * @param {Object} playlist\n *        the playlist that the segment belongs to.\n * @param {Object} segment\n *        the segment to get a duration for.\n *\n * @return {number}\n *          the segment duration\n */\n\nvar segmentDurationWithParts = function segmentDurationWithParts(playlist, segment) {\n  // if this isn't a preload segment\n  // then we will have a segment duration that is accurate.\n  if (!segment.preload) {\n    return segment.duration;\n  } // otherwise we have to add up parts and preload hints\n  // to get an up to date duration.\n\n\n  var result = 0;\n  (segment.parts || []).forEach(function (p) {\n    result += p.duration;\n  }); // for preload hints we have to use partTargetDuration\n  // as they won't even have a duration yet.\n\n  (segment.preloadHints || []).forEach(function (p) {\n    if (p.type === 'PART') {\n      result += playlist.partTargetDuration;\n    }\n  });\n  return result;\n};\n/**\n * A function to get a combined list of parts and segments with durations\n * and indexes.\n *\n * @param {Playlist} playlist the playlist to get the list for.\n *\n * @return {Array} The part/segment list.\n */\n\n\nvar getPartsAndSegments = function getPartsAndSegments(playlist) {\n  return (playlist.segments || []).reduce(function (acc, segment, si) {\n    if (segment.parts) {\n      segment.parts.forEach(function (part, pi) {\n        acc.push({\n          duration: part.duration,\n          segmentIndex: si,\n          partIndex: pi,\n          part: part,\n          segment: segment\n        });\n      });\n    } else {\n      acc.push({\n        duration: segment.duration,\n        segmentIndex: si,\n        partIndex: null,\n        segment: segment,\n        part: null\n      });\n    }\n\n    return acc;\n  }, []);\n};\n\nvar getLastParts = function getLastParts(media) {\n  var lastSegment = media.segments && media.segments.length && media.segments[media.segments.length - 1];\n  return lastSegment && lastSegment.parts || [];\n};\n\nvar getKnownPartCount = function getKnownPartCount(_ref) {\n  var preloadSegment = _ref.preloadSegment;\n\n  if (!preloadSegment) {\n    return;\n  }\n\n  var parts = preloadSegment.parts,\n      preloadHints = preloadSegment.preloadHints;\n  var partCount = (preloadHints || []).reduce(function (count, hint) {\n    return count + (hint.type === 'PART' ? 1 : 0);\n  }, 0);\n  partCount += parts && parts.length ? parts.length : 0;\n  return partCount;\n};\n/**\n * Get the number of seconds to delay from the end of a\n * live playlist.\n *\n * @param {Playlist} master the master playlist\n * @param {Playlist} media the media playlist\n * @return {number} the hold back in seconds.\n */\n\n\nvar liveEdgeDelay = function liveEdgeDelay(master, media) {\n  if (media.endList) {\n    return 0;\n  } // dash suggestedPresentationDelay trumps everything\n\n\n  if (master && master.suggestedPresentationDelay) {\n    return master.suggestedPresentationDelay;\n  }\n\n  var hasParts = getLastParts(media).length > 0; // look for \"part\" delays from ll-hls first\n\n  if (hasParts && media.serverControl && media.serverControl.partHoldBack) {\n    return media.serverControl.partHoldBack;\n  } else if (hasParts && media.partTargetDuration) {\n    return media.partTargetDuration * 3; // finally look for full segment delays\n  } else if (media.serverControl && media.serverControl.holdBack) {\n    return media.serverControl.holdBack;\n  } else if (media.targetDuration) {\n    return media.targetDuration * 3;\n  }\n\n  return 0;\n};\n/**\n * walk backward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {Number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar backwardDuration = function backwardDuration(playlist, endSequence) {\n  var result = 0;\n  var i = endSequence - playlist.mediaSequence; // if a start time is available for segment immediately following\n  // the interval, use it\n\n  var segment = playlist.segments[i]; // Walk backward until we find the latest segment with timeline\n  // information that is earlier than endSequence\n\n  if (segment) {\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start,\n        precise: true\n      };\n    }\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - segment.duration,\n        precise: true\n      };\n    }\n  }\n\n  while (i--) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: result + segment.end,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: result + segment.start,\n        precise: true\n      };\n    }\n  }\n\n  return {\n    result: result,\n    precise: false\n  };\n};\n/**\n * walk forward until we find a duration we can use\n * or return a failure\n *\n * @param {Playlist} playlist the playlist to walk through\n * @param {number} endSequence the mediaSequence to stop walking on\n */\n\n\nvar forwardDuration = function forwardDuration(playlist, endSequence) {\n  var result = 0;\n  var segment;\n  var i = endSequence - playlist.mediaSequence; // Walk forward until we find the earliest segment with timeline\n  // information\n\n  for (; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i];\n\n    if (typeof segment.start !== 'undefined') {\n      return {\n        result: segment.start - result,\n        precise: true\n      };\n    }\n\n    result += segmentDurationWithParts(playlist, segment);\n\n    if (typeof segment.end !== 'undefined') {\n      return {\n        result: segment.end - result,\n        precise: true\n      };\n    }\n  } // indicate we didn't find a useful duration estimate\n\n\n  return {\n    result: -1,\n    precise: false\n  };\n};\n/**\n  * Calculate the media duration from the segments associated with a\n  * playlist. The duration of a subinterval of the available segments\n  * may be calculated by specifying an end index.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper boundary\n  * for the playlist.  Defaults to playlist length.\n  * @param {number} expired the amount of time that has dropped\n  * off the front of the playlist in a live scenario\n  * @return {number} the duration between the first available segment\n  * and end index.\n  */\n\n\nvar intervalDuration = function intervalDuration(playlist, endSequence, expired) {\n  if (typeof endSequence === 'undefined') {\n    endSequence = playlist.mediaSequence + playlist.segments.length;\n  }\n\n  if (endSequence < playlist.mediaSequence) {\n    return 0;\n  } // do a backward walk to estimate the duration\n\n\n  var backward = backwardDuration(playlist, endSequence);\n\n  if (backward.precise) {\n    // if we were able to base our duration estimate on timing\n    // information provided directly from the Media Source, return\n    // it\n    return backward.result;\n  } // walk forward to see if a precise duration estimate can be made\n  // that way\n\n\n  var forward = forwardDuration(playlist, endSequence);\n\n  if (forward.precise) {\n    // we found a segment that has been buffered and so it's\n    // position is known precisely\n    return forward.result;\n  } // return the less-precise, playlist-based duration estimate\n\n\n  return backward.result + expired;\n};\n/**\n  * Calculates the duration of a playlist. If a start and end index\n  * are specified, the duration will be for the subset of the media\n  * timeline between those two indices. The total duration for live\n  * playlists is always Infinity.\n  *\n  * @param {Object} playlist a media playlist object\n  * @param {number=} endSequence an exclusive upper\n  * boundary for the playlist. Defaults to the playlist media\n  * sequence number plus its length.\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @return {number} the duration between the start index and end\n  * index.\n  */\n\n\nvar duration = function duration(playlist, endSequence, expired) {\n  if (!playlist) {\n    return 0;\n  }\n\n  if (typeof expired !== 'number') {\n    expired = 0;\n  } // if a slice of the total duration is not requested, use\n  // playlist-level duration indicators when they're present\n\n\n  if (typeof endSequence === 'undefined') {\n    // if present, use the duration specified in the playlist\n    if (playlist.totalDuration) {\n      return playlist.totalDuration;\n    } // duration should be Infinity for live playlists\n\n\n    if (!playlist.endList) {\n      return window$1.Infinity;\n    }\n  } // calculate the total duration based on the segment durations\n\n\n  return intervalDuration(playlist, endSequence, expired);\n};\n/**\n  * Calculate the time between two indexes in the current playlist\n  * neight the start- nor the end-index need to be within the current\n  * playlist in which case, the targetDuration of the playlist is used\n  * to approximate the durations of the segments\n  *\n  * @param {Array} options.durationList list to iterate over for durations.\n  * @param {number} options.defaultDuration duration to use for elements before or after the durationList\n  * @param {number} options.startIndex partsAndSegments index to start\n  * @param {number} options.endIndex partsAndSegments index to end.\n  * @return {number} the number of seconds between startIndex and endIndex\n  */\n\n\nvar sumDurations = function sumDurations(_ref2) {\n  var defaultDuration = _ref2.defaultDuration,\n      durationList = _ref2.durationList,\n      startIndex = _ref2.startIndex,\n      endIndex = _ref2.endIndex;\n  var durations = 0;\n\n  if (startIndex > endIndex) {\n    var _ref3 = [endIndex, startIndex];\n    startIndex = _ref3[0];\n    endIndex = _ref3[1];\n  }\n\n  if (startIndex < 0) {\n    for (var i = startIndex; i < Math.min(0, endIndex); i++) {\n      durations += defaultDuration;\n    }\n\n    startIndex = 0;\n  }\n\n  for (var _i = startIndex; _i < endIndex; _i++) {\n    durations += durationList[_i].duration;\n  }\n\n  return durations;\n};\n/**\n * Calculates the playlist end time\n *\n * @param {Object} playlist a media playlist object\n * @param {number=} expired the amount of time that has\n *                  dropped off the front of the playlist in a live scenario\n * @param {boolean|false} useSafeLiveEnd a boolean value indicating whether or not the\n *                        playlist end calculation should consider the safe live end\n *                        (truncate the playlist end by three segments). This is normally\n *                        used for calculating the end of the playlist's seekable range.\n *                        This takes into account the value of liveEdgePadding.\n *                        Setting liveEdgePadding to 0 is equivalent to setting this to false.\n * @param {number} liveEdgePadding a number indicating how far from the end of the playlist we should be in seconds.\n *                 If this is provided, it is used in the safe live end calculation.\n *                 Setting useSafeLiveEnd=false or liveEdgePadding=0 are equivalent.\n *                 Corresponds to suggestedPresentationDelay in DASH manifests.\n * @return {number} the end time of playlist\n * @function playlistEnd\n */\n\n\nvar playlistEnd = function playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding) {\n  if (!playlist || !playlist.segments) {\n    return null;\n  }\n\n  if (playlist.endList) {\n    return duration(playlist);\n  }\n\n  if (expired === null) {\n    return null;\n  }\n\n  expired = expired || 0;\n  var lastSegmentEndTime = intervalDuration(playlist, playlist.mediaSequence + playlist.segments.length, expired);\n\n  if (useSafeLiveEnd) {\n    liveEdgePadding = typeof liveEdgePadding === 'number' ? liveEdgePadding : liveEdgeDelay(null, playlist);\n    lastSegmentEndTime -= liveEdgePadding;\n  } // don't return a time less than zero\n\n\n  return Math.max(0, lastSegmentEndTime);\n};\n/**\n  * Calculates the interval of time that is currently seekable in a\n  * playlist. The returned time ranges are relative to the earliest\n  * moment in the specified playlist that is still available. A full\n  * seekable implementation for live streams would need to offset\n  * these values by the duration of content that has expired from the\n  * stream.\n  *\n  * @param {Object} playlist a media playlist object\n  * dropped off the front of the playlist in a live scenario\n  * @param {number=} expired the amount of time that has\n  * dropped off the front of the playlist in a live scenario\n  * @param {number} liveEdgePadding how far from the end of the playlist we should be in seconds.\n  *        Corresponds to suggestedPresentationDelay in DASH manifests.\n  * @return {TimeRanges} the periods of time that are valid targets\n  * for seeking\n  */\n\n\nvar seekable = function seekable(playlist, expired, liveEdgePadding) {\n  var useSafeLiveEnd = true;\n  var seekableStart = expired || 0;\n  var seekableEnd = playlistEnd(playlist, expired, useSafeLiveEnd, liveEdgePadding);\n\n  if (seekableEnd === null) {\n    return createTimeRange();\n  }\n\n  return createTimeRange(seekableStart, seekableEnd);\n};\n/**\n * Determine the index and estimated starting time of the segment that\n * contains a specified playback position in a media playlist.\n *\n * @param {Object} options.playlist the media playlist to query\n * @param {number} options.currentTime The number of seconds since the earliest\n * possible position to determine the containing segment for\n * @param {number} options.startTime the time when the segment/part starts\n * @param {number} options.startingSegmentIndex the segment index to start looking at.\n * @param {number?} [options.startingPartIndex] the part index to look at within the segment.\n *\n * @return {Object} an object with partIndex, segmentIndex, and startTime.\n */\n\n\nvar getMediaInfoForTime = function getMediaInfoForTime(_ref4) {\n  var playlist = _ref4.playlist,\n      currentTime = _ref4.currentTime,\n      startingSegmentIndex = _ref4.startingSegmentIndex,\n      startingPartIndex = _ref4.startingPartIndex,\n      startTime = _ref4.startTime,\n      experimentalExactManifestTimings = _ref4.experimentalExactManifestTimings;\n  var time = currentTime - startTime;\n  var partsAndSegments = getPartsAndSegments(playlist);\n  var startIndex = 0;\n\n  for (var i = 0; i < partsAndSegments.length; i++) {\n    var partAndSegment = partsAndSegments[i];\n\n    if (startingSegmentIndex !== partAndSegment.segmentIndex) {\n      continue;\n    } // skip this if part index does not match.\n\n\n    if (typeof startingPartIndex === 'number' && typeof partAndSegment.partIndex === 'number' && startingPartIndex !== partAndSegment.partIndex) {\n      continue;\n    }\n\n    startIndex = i;\n    break;\n  }\n\n  if (time < 0) {\n    // Walk backward from startIndex in the playlist, adding durations\n    // until we find a segment that contains `time` and return it\n    if (startIndex > 0) {\n      for (var _i2 = startIndex - 1; _i2 >= 0; _i2--) {\n        var _partAndSegment = partsAndSegments[_i2];\n        time += _partAndSegment.duration;\n\n        if (experimentalExactManifestTimings) {\n          if (time < 0) {\n            continue;\n          }\n        } else if (time + TIME_FUDGE_FACTOR <= 0) {\n          continue;\n        }\n\n        return {\n          partIndex: _partAndSegment.partIndex,\n          segmentIndex: _partAndSegment.segmentIndex,\n          startTime: startTime - sumDurations({\n            defaultDuration: playlist.targetDuration,\n            durationList: partsAndSegments,\n            startIndex: startIndex,\n            endIndex: _i2\n          })\n        };\n      }\n    } // We were unable to find a good segment within the playlist\n    // so select the first segment\n\n\n    return {\n      partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n      segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n      startTime: currentTime\n    };\n  } // When startIndex is negative, we first walk forward to first segment\n  // adding target durations. If we \"run out of time\" before getting to\n  // the first segment, return the first segment\n\n\n  if (startIndex < 0) {\n    for (var _i3 = startIndex; _i3 < 0; _i3++) {\n      time -= playlist.targetDuration;\n\n      if (time < 0) {\n        return {\n          partIndex: partsAndSegments[0] && partsAndSegments[0].partIndex || null,\n          segmentIndex: partsAndSegments[0] && partsAndSegments[0].segmentIndex || 0,\n          startTime: currentTime\n        };\n      }\n    }\n\n    startIndex = 0;\n  } // Walk forward from startIndex in the playlist, subtracting durations\n  // until we find a segment that contains `time` and return it\n\n\n  for (var _i4 = startIndex; _i4 < partsAndSegments.length; _i4++) {\n    var _partAndSegment2 = partsAndSegments[_i4];\n    time -= _partAndSegment2.duration;\n\n    if (experimentalExactManifestTimings) {\n      if (time > 0) {\n        continue;\n      }\n    } else if (time - TIME_FUDGE_FACTOR >= 0) {\n      continue;\n    }\n\n    return {\n      partIndex: _partAndSegment2.partIndex,\n      segmentIndex: _partAndSegment2.segmentIndex,\n      startTime: startTime + sumDurations({\n        defaultDuration: playlist.targetDuration,\n        durationList: partsAndSegments,\n        startIndex: startIndex,\n        endIndex: _i4\n      })\n    };\n  } // We are out of possible candidates so load the last one...\n\n\n  return {\n    segmentIndex: partsAndSegments[partsAndSegments.length - 1].segmentIndex,\n    partIndex: partsAndSegments[partsAndSegments.length - 1].partIndex,\n    startTime: currentTime\n  };\n};\n/**\n * Check whether the playlist is blacklisted or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is blacklisted or not\n * @function isBlacklisted\n */\n\n\nvar isBlacklisted = function isBlacklisted(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil > Date.now();\n};\n/**\n * Check whether the playlist is compatible with current playback configuration or has\n * been blacklisted permanently for being incompatible.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is incompatible or not\n * @function isIncompatible\n */\n\n\nvar isIncompatible = function isIncompatible(playlist) {\n  return playlist.excludeUntil && playlist.excludeUntil === Infinity;\n};\n/**\n * Check whether the playlist is enabled or not.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is enabled or not\n * @function isEnabled\n */\n\n\nvar isEnabled = function isEnabled(playlist) {\n  var blacklisted = isBlacklisted(playlist);\n  return !playlist.disabled && !blacklisted;\n};\n/**\n * Check whether the playlist has been manually disabled through the representations api.\n *\n * @param {Object} playlist the media playlist object\n * @return {boolean} whether the playlist is disabled manually or not\n * @function isDisabled\n */\n\n\nvar isDisabled = function isDisabled(playlist) {\n  return playlist.disabled;\n};\n/**\n * Returns whether the current playlist is an AES encrypted HLS stream\n *\n * @return {boolean} true if it's an AES encrypted HLS stream\n */\n\n\nvar isAes = function isAes(media) {\n  for (var i = 0; i < media.segments.length; i++) {\n    if (media.segments[i].key) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Checks if the playlist has a value for the specified attribute\n *\n * @param {string} attr\n *        Attribute to check for\n * @param {Object} playlist\n *        The media playlist object\n * @return {boolean}\n *         Whether the playlist contains a value for the attribute or not\n * @function hasAttribute\n */\n\n\nvar hasAttribute = function hasAttribute(attr, playlist) {\n  return playlist.attributes && playlist.attributes[attr];\n};\n/**\n * Estimates the time required to complete a segment download from the specified playlist\n *\n * @param {number} segmentDuration\n *        Duration of requested segment\n * @param {number} bandwidth\n *        Current measured bandwidth of the player\n * @param {Object} playlist\n *        The media playlist object\n * @param {number=} bytesReceived\n *        Number of bytes already received for the request. Defaults to 0\n * @return {number|NaN}\n *         The estimated time to request the segment. NaN if bandwidth information for\n *         the given playlist is unavailable\n * @function estimateSegmentRequestTime\n */\n\n\nvar estimateSegmentRequestTime = function estimateSegmentRequestTime(segmentDuration, bandwidth, playlist, bytesReceived) {\n  if (bytesReceived === void 0) {\n    bytesReceived = 0;\n  }\n\n  if (!hasAttribute('BANDWIDTH', playlist)) {\n    return NaN;\n  }\n\n  var size = segmentDuration * playlist.attributes.BANDWIDTH;\n  return (size - bytesReceived * 8) / bandwidth;\n};\n/*\n * Returns whether the current playlist is the lowest rendition\n *\n * @return {Boolean} true if on lowest rendition\n */\n\n\nvar isLowestEnabledRendition = function isLowestEnabledRendition(master, media) {\n  if (master.playlists.length === 1) {\n    return true;\n  }\n\n  var currentBandwidth = media.attributes.BANDWIDTH || Number.MAX_VALUE;\n  return master.playlists.filter(function (playlist) {\n    if (!isEnabled(playlist)) {\n      return false;\n    }\n\n    return (playlist.attributes.BANDWIDTH || 0) < currentBandwidth;\n  }).length === 0;\n};\n\nvar playlistMatch = function playlistMatch(a, b) {\n  // both playlits are null\n  // or only one playlist is non-null\n  // no match\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // playlist objects are the same, match\n\n\n  if (a === b) {\n    return true;\n  } // first try to use id as it should be the most\n  // accurate\n\n\n  if (a.id && b.id && a.id === b.id) {\n    return true;\n  } // next try to use reslovedUri as it should be the\n  // second most accurate.\n\n\n  if (a.resolvedUri && b.resolvedUri && a.resolvedUri === b.resolvedUri) {\n    return true;\n  } // finally try to use uri as it should be accurate\n  // but might miss a few cases for relative uris\n\n\n  if (a.uri && b.uri && a.uri === b.uri) {\n    return true;\n  }\n\n  return false;\n};\n\nvar someAudioVariant = function someAudioVariant(master, callback) {\n  var AUDIO = master && master.mediaGroups && master.mediaGroups.AUDIO || {};\n  var found = false;\n\n  for (var groupName in AUDIO) {\n    for (var label in AUDIO[groupName]) {\n      found = callback(AUDIO[groupName][label]);\n\n      if (found) {\n        break;\n      }\n    }\n\n    if (found) {\n      break;\n    }\n  }\n\n  return !!found;\n};\n\nvar isAudioOnly = function isAudioOnly(master) {\n  // we are audio only if we have no main playlists but do\n  // have media group playlists.\n  if (!master || !master.playlists || !master.playlists.length) {\n    // without audio variants or playlists this\n    // is not an audio only master.\n    var found = someAudioVariant(master, function (variant) {\n      return variant.playlists && variant.playlists.length || variant.uri;\n    });\n    return found;\n  } // if every playlist has only an audio codec it is audio only\n\n\n  var _loop = function _loop(i) {\n    var playlist = master.playlists[i];\n    var CODECS = playlist.attributes && playlist.attributes.CODECS; // all codecs are audio, this is an audio playlist.\n\n    if (CODECS && CODECS.split(',').every(function (c) {\n      return isAudioCodec(c);\n    })) {\n      return \"continue\";\n    } // playlist is in an audio group it is audio only\n\n\n    var found = someAudioVariant(master, function (variant) {\n      return playlistMatch(playlist, variant);\n    });\n\n    if (found) {\n      return \"continue\";\n    } // if we make it here this playlist isn't audio and we\n    // are not audio only\n\n\n    return {\n      v: false\n    };\n  };\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    var _ret = _loop(i);\n\n    if (_ret === \"continue\") continue;\n    if (typeof _ret === \"object\") return _ret.v;\n  } // if we make it past every playlist without returning, then\n  // this is an audio only playlist.\n\n\n  return true;\n}; // exports\n\n\nvar Playlist = {\n  liveEdgeDelay: liveEdgeDelay,\n  duration: duration,\n  seekable: seekable,\n  getMediaInfoForTime: getMediaInfoForTime,\n  isEnabled: isEnabled,\n  isDisabled: isDisabled,\n  isBlacklisted: isBlacklisted,\n  isIncompatible: isIncompatible,\n  playlistEnd: playlistEnd,\n  isAes: isAes,\n  hasAttribute: hasAttribute,\n  estimateSegmentRequestTime: estimateSegmentRequestTime,\n  isLowestEnabledRendition: isLowestEnabledRendition,\n  isAudioOnly: isAudioOnly,\n  playlistMatch: playlistMatch,\n  segmentDurationWithParts: segmentDurationWithParts\n};\nvar log = videojs.log;\n\nvar createPlaylistID = function createPlaylistID(index, uri) {\n  return index + \"-\" + uri;\n}; // default function for creating a group id\n\n\nvar groupID = function groupID(type, group, label) {\n  return \"placeholder-uri-\" + type + \"-\" + group + \"-\" + label;\n};\n/**\n * Parses a given m3u8 playlist\n *\n * @param {Function} [onwarn]\n *        a function to call when the parser triggers a warning event.\n * @param {Function} [oninfo]\n *        a function to call when the parser triggers an info event.\n * @param {string} manifestString\n *        The downloaded manifest string\n * @param {Object[]} [customTagParsers]\n *        An array of custom tag parsers for the m3u8-parser instance\n * @param {Object[]} [customTagMappers]\n *        An array of custom tag mappers for the m3u8-parser instance\n * @param {boolean} [experimentalLLHLS=false]\n *        Whether to keep ll-hls features in the manifest after parsing.\n * @return {Object}\n *         The manifest object\n */\n\n\nvar parseManifest = function parseManifest(_ref) {\n  var onwarn = _ref.onwarn,\n      oninfo = _ref.oninfo,\n      manifestString = _ref.manifestString,\n      _ref$customTagParsers = _ref.customTagParsers,\n      customTagParsers = _ref$customTagParsers === void 0 ? [] : _ref$customTagParsers,\n      _ref$customTagMappers = _ref.customTagMappers,\n      customTagMappers = _ref$customTagMappers === void 0 ? [] : _ref$customTagMappers,\n      experimentalLLHLS = _ref.experimentalLLHLS;\n  var parser = new Parser();\n\n  if (onwarn) {\n    parser.on('warn', onwarn);\n  }\n\n  if (oninfo) {\n    parser.on('info', oninfo);\n  }\n\n  customTagParsers.forEach(function (customParser) {\n    return parser.addParser(customParser);\n  });\n  customTagMappers.forEach(function (mapper) {\n    return parser.addTagMapper(mapper);\n  });\n  parser.push(manifestString);\n  parser.end();\n  var manifest = parser.manifest; // remove llhls features from the parsed manifest\n  // if we don't want llhls support.\n\n  if (!experimentalLLHLS) {\n    ['preloadSegment', 'skip', 'serverControl', 'renditionReports', 'partInf', 'partTargetDuration'].forEach(function (k) {\n      if (manifest.hasOwnProperty(k)) {\n        delete manifest[k];\n      }\n    });\n\n    if (manifest.segments) {\n      manifest.segments.forEach(function (segment) {\n        ['parts', 'preloadHints'].forEach(function (k) {\n          if (segment.hasOwnProperty(k)) {\n            delete segment[k];\n          }\n        });\n      });\n    }\n  }\n\n  if (!manifest.targetDuration) {\n    var targetDuration = 10;\n\n    if (manifest.segments && manifest.segments.length) {\n      targetDuration = manifest.segments.reduce(function (acc, s) {\n        return Math.max(acc, s.duration);\n      }, 0);\n    }\n\n    if (onwarn) {\n      onwarn(\"manifest has no targetDuration defaulting to \" + targetDuration);\n    }\n\n    manifest.targetDuration = targetDuration;\n  }\n\n  var parts = getLastParts(manifest);\n\n  if (parts.length && !manifest.partTargetDuration) {\n    var partTargetDuration = parts.reduce(function (acc, p) {\n      return Math.max(acc, p.duration);\n    }, 0);\n\n    if (onwarn) {\n      onwarn(\"manifest has no partTargetDuration defaulting to \" + partTargetDuration);\n      log.error('LL-HLS manifest has parts but lacks required #EXT-X-PART-INF:PART-TARGET value. See https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-09#section-4.4.3.7. Playback is not guaranteed.');\n    }\n\n    manifest.partTargetDuration = partTargetDuration;\n  }\n\n  return manifest;\n};\n/**\n * Loops through all supported media groups in master and calls the provided\n * callback for each group\n *\n * @param {Object} master\n *        The parsed master manifest object\n * @param {Function} callback\n *        Callback to call for each media group\n */\n\n\nvar forEachMediaGroup = function forEachMediaGroup(master, callback) {\n  if (!master.mediaGroups) {\n    return;\n  }\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (mediaType) {\n    if (!master.mediaGroups[mediaType]) {\n      return;\n    }\n\n    for (var groupKey in master.mediaGroups[mediaType]) {\n      for (var labelKey in master.mediaGroups[mediaType][groupKey]) {\n        var mediaProperties = master.mediaGroups[mediaType][groupKey][labelKey];\n        callback(mediaProperties, mediaType, groupKey, labelKey);\n      }\n    }\n  });\n};\n/**\n * Adds properties and attributes to the playlist to keep consistent functionality for\n * playlists throughout VHS.\n *\n * @param {Object} config\n *        Arguments object\n * @param {Object} config.playlist\n *        The media playlist\n * @param {string} [config.uri]\n *        The uri to the media playlist (if media playlist is not from within a master\n *        playlist)\n * @param {string} id\n *        ID to use for the playlist\n */\n\n\nvar setupMediaPlaylist = function setupMediaPlaylist(_ref2) {\n  var playlist = _ref2.playlist,\n      uri = _ref2.uri,\n      id = _ref2.id;\n  playlist.id = id;\n  playlist.playlistErrors_ = 0;\n\n  if (uri) {\n    // For media playlists, m3u8-parser does not have access to a URI, as HLS media\n    // playlists do not contain their own source URI, but one is needed for consistency in\n    // VHS.\n    playlist.uri = uri;\n  } // For HLS master playlists, even though certain attributes MUST be defined, the\n  // stream may still be played without them.\n  // For HLS media playlists, m3u8-parser does not attach an attributes object to the\n  // manifest.\n  //\n  // To avoid undefined reference errors through the project, and make the code easier\n  // to write/read, add an empty attributes object for these cases.\n\n\n  playlist.attributes = playlist.attributes || {};\n};\n/**\n * Adds ID, resolvedUri, and attributes properties to each playlist of the master, where\n * necessary. In addition, creates playlist IDs for each playlist and adds playlist ID to\n * playlist references to the playlists array.\n *\n * @param {Object} master\n *        The master playlist\n */\n\n\nvar setupMediaPlaylists = function setupMediaPlaylists(master) {\n  var i = master.playlists.length;\n\n  while (i--) {\n    var playlist = master.playlists[i];\n    setupMediaPlaylist({\n      playlist: playlist,\n      id: createPlaylistID(i, playlist.uri)\n    });\n    playlist.resolvedUri = resolveUrl(master.uri, playlist.uri);\n    master.playlists[playlist.id] = playlist; // URI reference added for backwards compatibility\n\n    master.playlists[playlist.uri] = playlist; // Although the spec states an #EXT-X-STREAM-INF tag MUST have a BANDWIDTH attribute,\n    // the stream can be played without it. Although an attributes property may have been\n    // added to the playlist to prevent undefined references, issue a warning to fix the\n    // manifest.\n\n    if (!playlist.attributes.BANDWIDTH) {\n      log.warn('Invalid playlist STREAM-INF detected. Missing BANDWIDTH attribute.');\n    }\n  }\n};\n/**\n * Adds resolvedUri properties to each media group.\n *\n * @param {Object} master\n *        The master playlist\n */\n\n\nvar resolveMediaGroupUris = function resolveMediaGroupUris(master) {\n  forEachMediaGroup(master, function (properties) {\n    if (properties.uri) {\n      properties.resolvedUri = resolveUrl(master.uri, properties.uri);\n    }\n  });\n};\n/**\n * Creates a master playlist wrapper to insert a sole media playlist into.\n *\n * @param {Object} media\n *        Media playlist\n * @param {string} uri\n *        The media URI\n *\n * @return {Object}\n *         Master playlist\n */\n\n\nvar masterForMedia = function masterForMedia(media, uri) {\n  var id = createPlaylistID(0, uri);\n  var master = {\n    mediaGroups: {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    },\n    uri: window$1.location.href,\n    resolvedUri: window$1.location.href,\n    playlists: [{\n      uri: uri,\n      id: id,\n      resolvedUri: uri,\n      // m3u8-parser does not attach an attributes property to media playlists so make\n      // sure that the property is attached to avoid undefined reference errors\n      attributes: {}\n    }]\n  }; // set up ID reference\n\n  master.playlists[id] = master.playlists[0]; // URI reference added for backwards compatibility\n\n  master.playlists[uri] = master.playlists[0];\n  return master;\n};\n/**\n * Does an in-place update of the master manifest to add updated playlist URI references\n * as well as other properties needed by VHS that aren't included by the parser.\n *\n * @param {Object} master\n *        Master manifest object\n * @param {string} uri\n *        The source URI\n * @param {function} createGroupID\n *        A function to determine how to create the groupID for mediaGroups\n */\n\n\nvar addPropertiesToMaster = function addPropertiesToMaster(master, uri, createGroupID) {\n  if (createGroupID === void 0) {\n    createGroupID = groupID;\n  }\n\n  master.uri = uri;\n\n  for (var i = 0; i < master.playlists.length; i++) {\n    if (!master.playlists[i].uri) {\n      // Set up phony URIs for the playlists since playlists are referenced by their URIs\n      // throughout VHS, but some formats (e.g., DASH) don't have external URIs\n      // TODO: consider adding dummy URIs in mpd-parser\n      var phonyUri = \"placeholder-uri-\" + i;\n      master.playlists[i].uri = phonyUri;\n    }\n  }\n\n  var audioOnlyMaster = isAudioOnly(master);\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    // add a playlist array under properties\n    if (!properties.playlists || !properties.playlists.length) {\n      // If the manifest is audio only and this media group does not have a uri, check\n      // if the media group is located in the main list of playlists. If it is, don't add\n      // placeholder properties as it shouldn't be considered an alternate audio track.\n      if (audioOnlyMaster && mediaType === 'AUDIO' && !properties.uri) {\n        for (var _i = 0; _i < master.playlists.length; _i++) {\n          var p = master.playlists[_i];\n\n          if (p.attributes && p.attributes.AUDIO && p.attributes.AUDIO === groupKey) {\n            return;\n          }\n        }\n      }\n\n      properties.playlists = [_extends({}, properties)];\n    }\n\n    properties.playlists.forEach(function (p, i) {\n      var groupId = createGroupID(mediaType, groupKey, labelKey, p);\n      var id = createPlaylistID(i, groupId);\n\n      if (p.uri) {\n        p.resolvedUri = p.resolvedUri || resolveUrl(master.uri, p.uri);\n      } else {\n        // DEPRECATED, this has been added to prevent a breaking change.\n        // previously we only ever had a single media group playlist, so\n        // we mark the first playlist uri without prepending the index as we used to\n        // ideally we would do all of the playlists the same way.\n        p.uri = i === 0 ? groupId : id; // don't resolve a placeholder uri to an absolute url, just use\n        // the placeholder again\n\n        p.resolvedUri = p.uri;\n      }\n\n      p.id = p.id || id; // add an empty attributes object, all playlists are\n      // expected to have this.\n\n      p.attributes = p.attributes || {}; // setup ID and URI references (URI for backwards compatibility)\n\n      master.playlists[p.id] = p;\n      master.playlists[p.uri] = p;\n    });\n  });\n  setupMediaPlaylists(master);\n  resolveMediaGroupUris(master);\n};\n\nvar mergeOptions$2 = videojs.mergeOptions,\n    EventTarget$1 = videojs.EventTarget;\n\nvar addLLHLSQueryDirectives = function addLLHLSQueryDirectives(uri, media) {\n  if (media.endList || !media.serverControl) {\n    return uri;\n  }\n\n  var parameters = {};\n\n  if (media.serverControl.canBlockReload) {\n    var preloadSegment = media.preloadSegment; // next msn is a zero based value, length is not.\n\n    var nextMSN = media.mediaSequence + media.segments.length; // If preload segment has parts then it is likely\n    // that we are going to request a part of that preload segment.\n    // the logic below is used to determine that.\n\n    if (preloadSegment) {\n      var parts = preloadSegment.parts || []; // _HLS_part is a zero based index\n\n      var nextPart = getKnownPartCount(media) - 1; // if nextPart is > -1 and not equal to just the\n      // length of parts, then we know we had part preload hints\n      // and we need to add the _HLS_part= query\n\n      if (nextPart > -1 && nextPart !== parts.length - 1) {\n        // add existing parts to our preload hints\n        // eslint-disable-next-line\n        parameters._HLS_part = nextPart;\n      } // this if statement makes sure that we request the msn\n      // of the preload segment if:\n      // 1. the preload segment had parts (and was not yet a full segment)\n      //    but was added to our segments array\n      // 2. the preload segment had preload hints for parts that are not in\n      //    the manifest yet.\n      // in all other cases we want the segment after the preload segment\n      // which will be given by using media.segments.length because it is 1 based\n      // rather than 0 based.\n\n\n      if (nextPart > -1 || parts.length) {\n        nextMSN--;\n      }\n    } // add _HLS_msn= in front of any _HLS_part query\n    // eslint-disable-next-line\n\n\n    parameters._HLS_msn = nextMSN;\n  }\n\n  if (media.serverControl && media.serverControl.canSkipUntil) {\n    // add _HLS_skip= infront of all other queries.\n    // eslint-disable-next-line\n    parameters._HLS_skip = media.serverControl.canSkipDateranges ? 'v2' : 'YES';\n  }\n\n  if (Object.keys(parameters).length) {\n    var parsedUri = new window$1.URL(uri);\n    ['_HLS_skip', '_HLS_msn', '_HLS_part'].forEach(function (name) {\n      if (!parameters.hasOwnProperty(name)) {\n        return;\n      }\n\n      parsedUri.searchParams.set(name, parameters[name]);\n    });\n    uri = parsedUri.toString();\n  }\n\n  return uri;\n};\n/**\n * Returns a new segment object with properties and\n * the parts array merged.\n *\n * @param {Object} a the old segment\n * @param {Object} b the new segment\n *\n * @return {Object} the merged segment\n */\n\n\nvar updateSegment = function updateSegment(a, b) {\n  if (!a) {\n    return b;\n  }\n\n  var result = mergeOptions$2(a, b); // if only the old segment has preload hints\n  // and the new one does not, remove preload hints.\n\n  if (a.preloadHints && !b.preloadHints) {\n    delete result.preloadHints;\n  } // if only the old segment has parts\n  // then the parts are no longer valid\n\n\n  if (a.parts && !b.parts) {\n    delete result.parts; // if both segments have parts\n    // copy part propeties from the old segment\n    // to the new one.\n  } else if (a.parts && b.parts) {\n    for (var i = 0; i < b.parts.length; i++) {\n      if (a.parts && a.parts[i]) {\n        result.parts[i] = mergeOptions$2(a.parts[i], b.parts[i]);\n      }\n    }\n  } // set skipped to false for segments that have\n  // have had information merged from the old segment.\n\n\n  if (!a.skipped && b.skipped) {\n    result.skipped = false;\n  } // set preload to false for segments that have\n  // had information added in the new segment.\n\n\n  if (a.preload && !b.preload) {\n    result.preload = false;\n  }\n\n  return result;\n};\n/**\n * Returns a new array of segments that is the result of merging\n * properties from an older list of segments onto an updated\n * list. No properties on the updated playlist will be ovewritten.\n *\n * @param {Array} original the outdated list of segments\n * @param {Array} update the updated list of segments\n * @param {number=} offset the index of the first update\n * segment in the original segment list. For non-live playlists,\n * this should always be zero and does not need to be\n * specified. For live playlists, it should be the difference\n * between the media sequence numbers in the original and updated\n * playlists.\n * @return {Array} a list of merged segment objects\n */\n\n\nvar updateSegments = function updateSegments(original, update, offset) {\n  var oldSegments = original.slice();\n  var newSegments = update.slice();\n  offset = offset || 0;\n  var result = [];\n  var currentMap;\n\n  for (var newIndex = 0; newIndex < newSegments.length; newIndex++) {\n    var oldSegment = oldSegments[newIndex + offset];\n    var newSegment = newSegments[newIndex];\n\n    if (oldSegment) {\n      currentMap = oldSegment.map || currentMap;\n      result.push(updateSegment(oldSegment, newSegment));\n    } else {\n      // carry over map to new segment if it is missing\n      if (currentMap && !newSegment.map) {\n        newSegment.map = currentMap;\n      }\n\n      result.push(newSegment);\n    }\n  }\n\n  return result;\n};\n\nvar resolveSegmentUris = function resolveSegmentUris(segment, baseUri) {\n  // preloadSegment will not have a uri at all\n  // as the segment isn't actually in the manifest yet, only parts\n  if (!segment.resolvedUri && segment.uri) {\n    segment.resolvedUri = resolveUrl(baseUri, segment.uri);\n  }\n\n  if (segment.key && !segment.key.resolvedUri) {\n    segment.key.resolvedUri = resolveUrl(baseUri, segment.key.uri);\n  }\n\n  if (segment.map && !segment.map.resolvedUri) {\n    segment.map.resolvedUri = resolveUrl(baseUri, segment.map.uri);\n  }\n\n  if (segment.map && segment.map.key && !segment.map.key.resolvedUri) {\n    segment.map.key.resolvedUri = resolveUrl(baseUri, segment.map.key.uri);\n  }\n\n  if (segment.parts && segment.parts.length) {\n    segment.parts.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n\n  if (segment.preloadHints && segment.preloadHints.length) {\n    segment.preloadHints.forEach(function (p) {\n      if (p.resolvedUri) {\n        return;\n      }\n\n      p.resolvedUri = resolveUrl(baseUri, p.uri);\n    });\n  }\n};\n\nvar getAllSegments = function getAllSegments(media) {\n  var segments = media.segments || [];\n  var preloadSegment = media.preloadSegment; // a preloadSegment with only preloadHints is not currently\n  // a usable segment, only include a preloadSegment that has\n  // parts.\n\n  if (preloadSegment && preloadSegment.parts && preloadSegment.parts.length) {\n    // if preloadHints has a MAP that means that the\n    // init segment is going to change. We cannot use any of the parts\n    // from this preload segment.\n    if (preloadSegment.preloadHints) {\n      for (var i = 0; i < preloadSegment.preloadHints.length; i++) {\n        if (preloadSegment.preloadHints[i].type === 'MAP') {\n          return segments;\n        }\n      }\n    } // set the duration for our preload segment to target duration.\n\n\n    preloadSegment.duration = media.targetDuration;\n    preloadSegment.preload = true;\n    segments.push(preloadSegment);\n  }\n\n  return segments;\n}; // consider the playlist unchanged if the playlist object is the same or\n// the number of segments is equal, the media sequence number is unchanged,\n// and this playlist hasn't become the end of the playlist\n\n\nvar isPlaylistUnchanged = function isPlaylistUnchanged(a, b) {\n  return a === b || a.segments && b.segments && a.segments.length === b.segments.length && a.endList === b.endList && a.mediaSequence === b.mediaSequence && a.preloadSegment === b.preloadSegment;\n};\n/**\n  * Returns a new master playlist that is the result of merging an\n  * updated media playlist into the original version. If the\n  * updated media playlist does not match any of the playlist\n  * entries in the original master playlist, null is returned.\n  *\n  * @param {Object} master a parsed master M3U8 object\n  * @param {Object} media a parsed media M3U8 object\n  * @return {Object} a new object that represents the original\n  * master playlist with the updated media playlist merged in, or\n  * null if the merge produced no change.\n  */\n\n\nvar updateMaster$1 = function updateMaster(master, newMedia, unchangedCheck) {\n  if (unchangedCheck === void 0) {\n    unchangedCheck = isPlaylistUnchanged;\n  }\n\n  var result = mergeOptions$2(master, {});\n  var oldMedia = result.playlists[newMedia.id];\n\n  if (!oldMedia) {\n    return null;\n  }\n\n  if (unchangedCheck(oldMedia, newMedia)) {\n    return null;\n  }\n\n  newMedia.segments = getAllSegments(newMedia);\n  var mergedPlaylist = mergeOptions$2(oldMedia, newMedia); // always use the new media's preload segment\n\n  if (mergedPlaylist.preloadSegment && !newMedia.preloadSegment) {\n    delete mergedPlaylist.preloadSegment;\n  } // if the update could overlap existing segment information, merge the two segment lists\n\n\n  if (oldMedia.segments) {\n    if (newMedia.skip) {\n      newMedia.segments = newMedia.segments || []; // add back in objects for skipped segments, so that we merge\n      // old properties into the new segments\n\n      for (var i = 0; i < newMedia.skip.skippedSegments; i++) {\n        newMedia.segments.unshift({\n          skipped: true\n        });\n      }\n    }\n\n    mergedPlaylist.segments = updateSegments(oldMedia.segments, newMedia.segments, newMedia.mediaSequence - oldMedia.mediaSequence);\n  } // resolve any segment URIs to prevent us from having to do it later\n\n\n  mergedPlaylist.segments.forEach(function (segment) {\n    resolveSegmentUris(segment, mergedPlaylist.resolvedUri);\n  }); // TODO Right now in the playlists array there are two references to each playlist, one\n  // that is referenced by index, and one by URI. The index reference may no longer be\n  // necessary.\n\n  for (var _i = 0; _i < result.playlists.length; _i++) {\n    if (result.playlists[_i].id === newMedia.id) {\n      result.playlists[_i] = mergedPlaylist;\n    }\n  }\n\n  result.playlists[newMedia.id] = mergedPlaylist; // URI reference added for backwards compatibility\n\n  result.playlists[newMedia.uri] = mergedPlaylist; // update media group playlist references.\n\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (!properties.playlists) {\n      return;\n    }\n\n    for (var _i2 = 0; _i2 < properties.playlists.length; _i2++) {\n      if (newMedia.id === properties.playlists[_i2].id) {\n        properties.playlists[_i2] = mergedPlaylist;\n      }\n    }\n  });\n  return result;\n};\n/**\n * Calculates the time to wait before refreshing a live playlist\n *\n * @param {Object} media\n *        The current media\n * @param {boolean} update\n *        True if there were any updates from the last refresh, false otherwise\n * @return {number}\n *         The time in ms to wait before refreshing the live playlist\n */\n\n\nvar refreshDelay = function refreshDelay(media, update) {\n  var segments = media.segments || [];\n  var lastSegment = segments[segments.length - 1];\n  var lastPart = lastSegment && lastSegment.parts && lastSegment.parts[lastSegment.parts.length - 1];\n  var lastDuration = lastPart && lastPart.duration || lastSegment && lastSegment.duration;\n\n  if (update && lastDuration) {\n    return lastDuration * 1000;\n  } // if the playlist is unchanged since the last reload or last segment duration\n  // cannot be determined, try again after half the target duration\n\n\n  return (media.partTargetDuration || media.targetDuration || 10) * 500;\n};\n/**\n * Load a playlist from a remote location\n *\n * @class PlaylistLoader\n * @extends Stream\n * @param {string|Object} src url or object of manifest\n * @param {boolean} withCredentials the withCredentials xhr option\n * @class\n */\n\n\nvar PlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(PlaylistLoader, _EventTarget);\n\n  function PlaylistLoader(src, vhs, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or object is required');\n    }\n\n    _this.logger_ = logger('PlaylistLoader');\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.src = src;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n    var vhsOptions = vhs.options_;\n    _this.customTagParsers = vhsOptions && vhsOptions.customTagParsers || [];\n    _this.customTagMappers = vhsOptions && vhsOptions.customTagMappers || [];\n    _this.experimentalLLHLS = vhsOptions && vhsOptions.experimentalLLHLS || false; // force experimentalLLHLS for IE 11\n\n    if (videojs.browser.IE_VERSION) {\n      _this.experimentalLLHLS = false;\n    } // initialize the loader state\n\n\n    _this.state = 'HAVE_NOTHING'; // live playlist staleness timeout\n\n    _this.handleMediaupdatetimeout_ = _this.handleMediaupdatetimeout_.bind(_assertThisInitialized(_this));\n\n    _this.on('mediaupdatetimeout', _this.handleMediaupdatetimeout_);\n\n    return _this;\n  }\n\n  var _proto = PlaylistLoader.prototype;\n\n  _proto.handleMediaupdatetimeout_ = function handleMediaupdatetimeout_() {\n    var _this2 = this;\n\n    if (this.state !== 'HAVE_METADATA') {\n      // only refresh the media playlist if no other activity is going on\n      return;\n    }\n\n    var media = this.media();\n    var uri = resolveUrl(this.master.uri, media.uri);\n\n    if (this.experimentalLLHLS) {\n      uri = addLLHLSQueryDirectives(uri, media);\n    }\n\n    this.state = 'HAVE_CURRENT_METADATA';\n    this.request = this.vhs_.xhr({\n      uri: uri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this2.request) {\n        return;\n      }\n\n      if (error) {\n        return _this2.playlistRequestError(_this2.request, _this2.media(), 'HAVE_METADATA');\n      }\n\n      _this2.haveMetadata({\n        playlistString: _this2.request.responseText,\n        url: _this2.media().uri,\n        id: _this2.media().id\n      });\n    });\n  };\n\n  _proto.playlistRequestError = function playlistRequestError(xhr, playlist, startingState) {\n    var uri = playlist.uri,\n        id = playlist.id; // any in-flight request is now finished\n\n    this.request = null;\n\n    if (startingState) {\n      this.state = startingState;\n    }\n\n    this.error = {\n      playlist: this.master.playlists[id],\n      status: xhr.status,\n      message: \"HLS playlist request error at URL: \" + uri + \".\",\n      responseText: xhr.responseText,\n      code: xhr.status >= 500 ? 4 : 2\n    };\n    this.trigger('error');\n  };\n\n  _proto.parseManifest_ = function parseManifest_(_ref) {\n    var _this3 = this;\n\n    var url = _ref.url,\n        manifestString = _ref.manifestString;\n    return parseManifest({\n      onwarn: function onwarn(_ref2) {\n        var message = _ref2.message;\n        return _this3.logger_(\"m3u8-parser warn for \" + url + \": \" + message);\n      },\n      oninfo: function oninfo(_ref3) {\n        var message = _ref3.message;\n        return _this3.logger_(\"m3u8-parser info for \" + url + \": \" + message);\n      },\n      manifestString: manifestString,\n      customTagParsers: this.customTagParsers,\n      customTagMappers: this.customTagMappers,\n      experimentalLLHLS: this.experimentalLLHLS\n    });\n  }\n  /**\n   * Update the playlist loader's state in response to a new or updated playlist.\n   *\n   * @param {string} [playlistString]\n   *        Playlist string (if playlistObject is not provided)\n   * @param {Object} [playlistObject]\n   *        Playlist object (if playlistString is not provided)\n   * @param {string} url\n   *        URL of playlist\n   * @param {string} id\n   *        ID to use for playlist\n   */\n  ;\n\n  _proto.haveMetadata = function haveMetadata(_ref4) {\n    var playlistString = _ref4.playlistString,\n        playlistObject = _ref4.playlistObject,\n        url = _ref4.url,\n        id = _ref4.id; // any in-flight request is now finished\n\n    this.request = null;\n    this.state = 'HAVE_METADATA';\n    var playlist = playlistObject || this.parseManifest_({\n      url: url,\n      manifestString: playlistString\n    });\n    playlist.lastRequest = Date.now();\n    setupMediaPlaylist({\n      playlist: playlist,\n      uri: url,\n      id: id\n    }); // merge this playlist into the master\n\n    var update = updateMaster$1(this.master, playlist);\n    this.targetDuration = playlist.partTargetDuration || playlist.targetDuration;\n    this.pendingMedia_ = null;\n\n    if (update) {\n      this.master = update;\n      this.media_ = this.master.playlists[id];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    this.updateMediaUpdateTimeout_(refreshDelay(this.media(), !!update));\n    this.trigger('loadedplaylist');\n  }\n  /**\n    * Abort any outstanding work and clean up.\n    */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    window$1.clearTimeout(this.finalRenditionTimeout);\n    this.off();\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  }\n  /**\n    * When called without any arguments, returns the currently\n    * active media playlist. When called with a single argument,\n    * triggers the playlist loader to asynchronously switch to the\n    * specified media playlist. Calling this method while the\n    * loader is in the HAVE_NOTHING causes an error to be emitted\n    * but otherwise has no effect.\n    *\n    * @param {Object=} playlist the parsed media playlist\n    * object to switch to\n    * @param {boolean=} shouldDelay whether we should delay the request by half target duration\n    *\n    * @return {Playlist} the current loaded media\n    */\n  ;\n\n  _proto.media = function media(playlist, shouldDelay) {\n    var _this4 = this; // getter\n\n\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    } // find the playlist object if the target playlist has been\n    // specified by URI\n\n\n    if (typeof playlist === 'string') {\n      if (!this.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.master.playlists[playlist];\n    }\n\n    window$1.clearTimeout(this.finalRenditionTimeout);\n\n    if (shouldDelay) {\n      var delay = (playlist.partTargetDuration || playlist.targetDuration) / 2 * 1000 || 5 * 1000;\n      this.finalRenditionTimeout = window$1.setTimeout(this.media.bind(this, playlist, false), delay);\n      return;\n    }\n\n    var startingState = this.state;\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id;\n    var masterPlaylistRef = this.master.playlists[playlist.id]; // switch to fully loaded playlists immediately\n\n    if (masterPlaylistRef && masterPlaylistRef.endList || // handle the case of a playlist object (e.g., if using vhs-json with a resolved\n    // media playlist or, for the case of demuxed audio, a resolved audio media group)\n    playlist.endList && playlist.segments.length) {\n      // abort outstanding playlist requests\n      if (this.request) {\n        this.request.onreadystatechange = null;\n        this.request.abort();\n        this.request = null;\n      }\n\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n\n        if (startingState === 'HAVE_MASTER') {\n          // The initial playlist was a master manifest, and the first media selected was\n          // also provided (in the form of a resolved playlist object) as part of the\n          // source object (rather than just a URL). Therefore, since the media playlist\n          // doesn't need to be requested, loadedmetadata won't trigger as part of the\n          // normal flow, and needs an explicit trigger here.\n          this.trigger('loadedmetadata');\n        } else {\n          this.trigger('mediachange');\n        }\n      }\n\n      return;\n    } // We update/set the timeout here so that live playlists\n    // that are not a media change will \"start\" the loader as expected.\n    // We expect that this function will start the media update timeout\n    // cycle again. This also prevents a playlist switch failure from\n    // causing us to stall during live.\n\n\n    this.updateMediaUpdateTimeout_(refreshDelay(playlist, true)); // switching to the active playlist is a no-op\n\n    if (!mediaChange) {\n      return;\n    }\n\n    this.state = 'SWITCHING_MEDIA'; // there is already an outstanding playlist request\n\n    if (this.request) {\n      if (playlist.resolvedUri === this.request.url) {\n        // requesting to switch to the same playlist multiple times\n        // has no effect after the first\n        return;\n      }\n\n      this.request.onreadystatechange = null;\n      this.request.abort();\n      this.request = null;\n    } // request the new playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.pendingMedia_ = playlist;\n    this.request = this.vhs_.xhr({\n      uri: playlist.resolvedUri,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this4.request) {\n        return;\n      }\n\n      playlist.lastRequest = Date.now();\n      playlist.resolvedUri = resolveManifestRedirect(_this4.handleManifestRedirects, playlist.resolvedUri, req);\n\n      if (error) {\n        return _this4.playlistRequestError(_this4.request, playlist, startingState);\n      }\n\n      _this4.haveMetadata({\n        playlistString: req.responseText,\n        url: playlist.uri,\n        id: playlist.id\n      }); // fire loadedmetadata the first time a media playlist is loaded\n\n\n      if (startingState === 'HAVE_MASTER') {\n        _this4.trigger('loadedmetadata');\n      } else {\n        _this4.trigger('mediachange');\n      }\n    });\n  }\n  /**\n   * pause loading of the playlist\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    this.stopRequest();\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    } // Need to restore state now that no activity is happening\n\n\n    if (this.state === 'SWITCHING_MEDIA') {\n      // if the loader was in the process of switching media, it should either return to\n      // HAVE_MASTER or HAVE_METADATA depending on if the loader has loaded a media\n      // playlist yet. This is determined by the existence of loader.media_\n      if (this.media_) {\n        this.state = 'HAVE_METADATA';\n      } else {\n        this.state = 'HAVE_MASTER';\n      }\n    } else if (this.state === 'HAVE_CURRENT_METADATA') {\n      this.state = 'HAVE_METADATA';\n    }\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.load = function load(shouldDelay) {\n    var _this5 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    }\n\n    var media = this.media();\n\n    if (shouldDelay) {\n      var delay = media ? (media.partTargetDuration || media.targetDuration) / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        _this5.mediaUpdateTimeout = null;\n\n        _this5.load();\n      }, delay);\n      return;\n    }\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.updateMediaUpdateTimeout_ = function updateMediaUpdateTimeout_(delay) {\n    var _this6 = this;\n\n    if (this.mediaUpdateTimeout) {\n      window$1.clearTimeout(this.mediaUpdateTimeout);\n      this.mediaUpdateTimeout = null;\n    } // we only have use mediaupdatetimeout for live playlists.\n\n\n    if (!this.media() || this.media().endList) {\n      return;\n    }\n\n    this.mediaUpdateTimeout = window$1.setTimeout(function () {\n      _this6.mediaUpdateTimeout = null;\n\n      _this6.trigger('mediaupdatetimeout');\n\n      _this6.updateMediaUpdateTimeout_(delay);\n    }, delay);\n  }\n  /**\n   * start loading of the playlist\n   */\n  ;\n\n  _proto.start = function start() {\n    var _this7 = this;\n\n    this.started = true;\n\n    if (typeof this.src === 'object') {\n      // in the case of an entirely constructed manifest object (meaning there's no actual\n      // manifest on a server), default the uri to the page's href\n      if (!this.src.uri) {\n        this.src.uri = window$1.location.href;\n      } // resolvedUri is added on internally after the initial request. Since there's no\n      // request for pre-resolved manifests, add on resolvedUri here.\n\n\n      this.src.resolvedUri = this.src.uri; // Since a manifest object was passed in as the source (instead of a URL), the first\n      // request can be skipped (since the top level of the manifest, at a minimum, is\n      // already available as a parsed manifest object). However, if the manifest object\n      // represents a master playlist, some media playlists may need to be resolved before\n      // the starting segment list is available. Therefore, go directly to setup of the\n      // initial playlist, and let the normal flow continue from there.\n      //\n      // Note that the call to setup is asynchronous, as other sections of VHS may assume\n      // that the first request is asynchronous.\n\n      setTimeout(function () {\n        _this7.setupInitialPlaylist(_this7.src);\n      }, 0);\n      return;\n    } // request the specified URL\n\n\n    this.request = this.vhs_.xhr({\n      uri: this.src,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      } // clear the loader's request reference\n\n\n      _this7.request = null;\n\n      if (error) {\n        _this7.error = {\n          status: req.status,\n          message: \"HLS playlist request error at URL: \" + _this7.src + \".\",\n          responseText: req.responseText,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        };\n\n        if (_this7.state === 'HAVE_NOTHING') {\n          _this7.started = false;\n        }\n\n        return _this7.trigger('error');\n      }\n\n      _this7.src = resolveManifestRedirect(_this7.handleManifestRedirects, _this7.src, req);\n\n      var manifest = _this7.parseManifest_({\n        manifestString: req.responseText,\n        url: _this7.src\n      });\n\n      _this7.setupInitialPlaylist(manifest);\n    });\n  };\n\n  _proto.srcUri = function srcUri() {\n    return typeof this.src === 'string' ? this.src : this.src.uri;\n  }\n  /**\n   * Given a manifest object that's either a master or media playlist, trigger the proper\n   * events and set the state of the playlist loader.\n   *\n   * If the manifest object represents a master playlist, `loadedplaylist` will be\n   * triggered to allow listeners to select a playlist. If none is selected, the loader\n   * will default to the first one in the playlists array.\n   *\n   * If the manifest object represents a media playlist, `loadedplaylist` will be\n   * triggered followed by `loadedmetadata`, as the only available playlist is loaded.\n   *\n   * In the case of a media playlist, a master playlist object wrapper with one playlist\n   * will be created so that all logic can handle playlists in the same fashion (as an\n   * assumed manifest object schema).\n   *\n   * @param {Object} manifest\n   *        The parsed manifest object\n   */\n  ;\n\n  _proto.setupInitialPlaylist = function setupInitialPlaylist(manifest) {\n    this.state = 'HAVE_MASTER';\n\n    if (manifest.playlists) {\n      this.master = manifest;\n      addPropertiesToMaster(this.master, this.srcUri()); // If the initial master playlist has playlists wtih segments already resolved,\n      // then resolve URIs in advance, as they are usually done after a playlist request,\n      // which may not happen if the playlist is resolved.\n\n      manifest.playlists.forEach(function (playlist) {\n        playlist.segments = getAllSegments(playlist);\n        playlist.segments.forEach(function (segment) {\n          resolveSegmentUris(segment, playlist.resolvedUri);\n        });\n      });\n      this.trigger('loadedplaylist');\n\n      if (!this.request) {\n        // no media playlist was specifically selected so start\n        // from the first listed one\n        this.media(this.master.playlists[0]);\n      }\n\n      return;\n    } // In order to support media playlists passed in as vhs-json, the case where the uri\n    // is not provided as part of the manifest should be considered, and an appropriate\n    // default used.\n\n\n    var uri = this.srcUri() || window$1.location.href;\n    this.master = masterForMedia(manifest, uri);\n    this.haveMetadata({\n      playlistObject: manifest,\n      url: uri,\n      id: this.master.playlists[0].id\n    });\n    this.trigger('loadedmetadata');\n  };\n\n  return PlaylistLoader;\n}(EventTarget$1);\n/**\n * @file xhr.js\n */\n\n\nvar videojsXHR = videojs.xhr,\n    mergeOptions$1 = videojs.mergeOptions;\n\nvar callbackWrapper = function callbackWrapper(request, error, response, callback) {\n  var reqResponse = request.responseType === 'arraybuffer' ? request.response : request.responseText;\n\n  if (!error && reqResponse) {\n    request.responseTime = Date.now();\n    request.roundTripTime = request.responseTime - request.requestTime;\n    request.bytesReceived = reqResponse.byteLength || reqResponse.length;\n\n    if (!request.bandwidth) {\n      request.bandwidth = Math.floor(request.bytesReceived / request.roundTripTime * 8 * 1000);\n    }\n  }\n\n  if (response.headers) {\n    request.responseHeaders = response.headers;\n  } // videojs.xhr now uses a specific code on the error\n  // object to signal that a request has timed out instead\n  // of setting a boolean on the request object\n\n\n  if (error && error.code === 'ETIMEDOUT') {\n    request.timedout = true;\n  } // videojs.xhr no longer considers status codes outside of 200 and 0\n  // (for file uris) to be errors, but the old XHR did, so emulate that\n  // behavior. Status 206 may be used in response to byterange requests.\n\n\n  if (!error && !request.aborted && response.statusCode !== 200 && response.statusCode !== 206 && response.statusCode !== 0) {\n    error = new Error('XHR Failed with a response of: ' + (request && (reqResponse || request.responseText)));\n  }\n\n  callback(error, request);\n};\n\nvar xhrFactory = function xhrFactory() {\n  var xhr = function XhrFunction(options, callback) {\n    // Add a default timeout\n    options = mergeOptions$1({\n      timeout: 45e3\n    }, options); // Allow an optional user-specified function to modify the option\n    // object before we construct the xhr request\n\n    var beforeRequest = XhrFunction.beforeRequest || videojs.Vhs.xhr.beforeRequest;\n\n    if (beforeRequest && typeof beforeRequest === 'function') {\n      var newOptions = beforeRequest(options);\n\n      if (newOptions) {\n        options = newOptions;\n      }\n    } // Use the standard videojs.xhr() method unless `videojs.Vhs.xhr` has been overriden\n    // TODO: switch back to videojs.Vhs.xhr.name === 'XhrFunction' when we drop IE11\n\n\n    var xhrMethod = videojs.Vhs.xhr.original === true ? videojsXHR : videojs.Vhs.xhr;\n    var request = xhrMethod(options, function (error, response) {\n      return callbackWrapper(request, error, response, callback);\n    });\n    var originalAbort = request.abort;\n\n    request.abort = function () {\n      request.aborted = true;\n      return originalAbort.apply(request, arguments);\n    };\n\n    request.uri = options.uri;\n    request.requestTime = Date.now();\n    return request;\n  };\n\n  xhr.original = true;\n  return xhr;\n};\n/**\n * Turns segment byterange into a string suitable for use in\n * HTTP Range requests\n *\n * @param {Object} byterange - an object with two values defining the start and end\n *                             of a byte-range\n */\n\n\nvar byterangeStr = function byterangeStr(byterange) {\n  // `byterangeEnd` is one less than `offset + length` because the HTTP range\n  // header uses inclusive ranges\n  var byterangeEnd;\n  var byterangeStart = byterange.offset;\n\n  if (typeof byterange.offset === 'bigint' || typeof byterange.length === 'bigint') {\n    byterangeEnd = window$1.BigInt(byterange.offset) + window$1.BigInt(byterange.length) - window$1.BigInt(1);\n  } else {\n    byterangeEnd = byterange.offset + byterange.length - 1;\n  }\n\n  return 'bytes=' + byterangeStart + '-' + byterangeEnd;\n};\n/**\n * Defines headers for use in the xhr request for a particular segment.\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n */\n\n\nvar segmentXhrHeaders = function segmentXhrHeaders(segment) {\n  var headers = {};\n\n  if (segment.byterange) {\n    headers.Range = byterangeStr(segment.byterange);\n  }\n\n  return headers;\n};\n/**\n * @file bin-utils.js\n */\n\n/**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {number} i the iterator on the range to convert\n * @return {string} the range in string format\n */\n\n\nvar textRange = function textRange(range, i) {\n  return range.start(i) + '-' + range.end(i);\n};\n/**\n * format a number as hex string\n *\n * @param {number} e The number\n * @param {number} i the iterator\n * @return {string} the hex formatted number as a string\n */\n\n\nvar formatHexString = function formatHexString(e, i) {\n  var value = e.toString(16);\n  return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n};\n\nvar formatAsciiString = function formatAsciiString(e) {\n  if (e >= 0x20 && e < 0x7e) {\n    return String.fromCharCode(e);\n  }\n\n  return '.';\n};\n/**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n *        Object of properties and values to send to the web worker\n * @return {Object}\n *         Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\n\n\nvar createTransferableMessage = function createTransferableMessage(message) {\n  var transferable = {};\n  Object.keys(message).forEach(function (key) {\n    var value = message[key];\n\n    if (isArrayBufferView(value)) {\n      transferable[key] = {\n        bytes: value.buffer,\n        byteOffset: value.byteOffset,\n        byteLength: value.byteLength\n      };\n    } else {\n      transferable[key] = value;\n    }\n  });\n  return transferable;\n};\n/**\n * Returns a unique string identifier for a media initialization\n * segment.\n *\n * @param {Object} initSegment\n *        the init segment object.\n *\n * @return {string} the generated init segment id\n */\n\n\nvar initSegmentId = function initSegmentId(initSegment) {\n  var byterange = initSegment.byterange || {\n    length: Infinity,\n    offset: 0\n  };\n  return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n};\n/**\n * Returns a unique string identifier for a media segment key.\n *\n * @param {Object} key the encryption key\n * @return {string} the unique id for the media segment key.\n */\n\n\nvar segmentKeyId = function segmentKeyId(key) {\n  return key.resolvedUri;\n};\n/**\n * utils to help dump binary data to the console\n *\n * @param {Array|TypedArray} data\n *        data to dump to a string\n *\n * @return {string} the data as a hex string.\n */\n\n\nvar hexDump = function hexDump(data) {\n  var bytes = Array.prototype.slice.call(data);\n  var step = 16;\n  var result = '';\n  var hex;\n  var ascii;\n\n  for (var j = 0; j < bytes.length / step; j++) {\n    hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n    ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n    result += hex + ' ' + ascii + '\\n';\n  }\n\n  return result;\n};\n\nvar tagDump = function tagDump(_ref) {\n  var bytes = _ref.bytes;\n  return hexDump(bytes);\n};\n\nvar textRanges = function textRanges(ranges) {\n  var result = '';\n  var i;\n\n  for (i = 0; i < ranges.length; i++) {\n    result += textRange(ranges, i) + ' ';\n  }\n\n  return result;\n};\n\nvar utils = /*#__PURE__*/Object.freeze({\n  __proto__: null,\n  createTransferableMessage: createTransferableMessage,\n  initSegmentId: initSegmentId,\n  segmentKeyId: segmentKeyId,\n  hexDump: hexDump,\n  tagDump: tagDump,\n  textRanges: textRanges\n}); // TODO handle fmp4 case where the timing info is accurate and doesn't involve transmux\n// 25% was arbitrarily chosen, and may need to be refined over time.\n\nvar SEGMENT_END_FUDGE_PERCENT = 0.25;\n/**\n * Converts a player time (any time that can be gotten/set from player.currentTime(),\n * e.g., any time within player.seekable().start(0) to player.seekable().end(0)) to a\n * program time (any time referencing the real world (e.g., EXT-X-PROGRAM-DATE-TIME)).\n *\n * The containing segment is required as the EXT-X-PROGRAM-DATE-TIME serves as an \"anchor\n * point\" (a point where we have a mapping from program time to player time, with player\n * time being the post transmux start of the segment).\n *\n * For more details, see [this doc](../../docs/program-time-from-player-time.md).\n *\n * @param {number} playerTime the player time\n * @param {Object} segment the segment which contains the player time\n * @return {Date} program time\n */\n\nvar playerTimeToProgramTime = function playerTimeToProgramTime(playerTime, segment) {\n  if (!segment.dateTimeObject) {\n    // Can't convert without an \"anchor point\" for the program time (i.e., a time that can\n    // be used to map the start of a segment with a real world time).\n    return null;\n  }\n\n  var transmuxerPrependedSeconds = segment.videoTimingInfo.transmuxerPrependedSeconds;\n  var transmuxedStart = segment.videoTimingInfo.transmuxedPresentationStart; // get the start of the content from before old content is prepended\n\n  var startOfSegment = transmuxedStart + transmuxerPrependedSeconds;\n  var offsetFromSegmentStart = playerTime - startOfSegment;\n  return new Date(segment.dateTimeObject.getTime() + offsetFromSegmentStart * 1000);\n};\n\nvar originalSegmentVideoDuration = function originalSegmentVideoDuration(videoTimingInfo) {\n  return videoTimingInfo.transmuxedPresentationEnd - videoTimingInfo.transmuxedPresentationStart - videoTimingInfo.transmuxerPrependedSeconds;\n};\n/**\n * Finds a segment that contains the time requested given as an ISO-8601 string. The\n * returned segment might be an estimate or an accurate match.\n *\n * @param {string} programTime The ISO-8601 programTime to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForProgramTime = function findSegmentForProgramTime(programTime, playlist) {\n  // Assumptions:\n  //  - verifyProgramDateTimeTags has already been run\n  //  - live streams have been started\n  var dateTimeObject;\n\n  try {\n    dateTimeObject = new Date(programTime);\n  } catch (e) {\n    return null;\n  }\n\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segment = playlist.segments[0];\n\n  if (dateTimeObject < segment.dateTimeObject) {\n    // Requested time is before stream start.\n    return null;\n  }\n\n  for (var i = 0; i < playlist.segments.length - 1; i++) {\n    segment = playlist.segments[i];\n    var nextSegmentStart = playlist.segments[i + 1].dateTimeObject;\n\n    if (dateTimeObject < nextSegmentStart) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n  var lastSegmentStart = lastSegment.dateTimeObject;\n  var lastSegmentDuration = lastSegment.videoTimingInfo ? originalSegmentVideoDuration(lastSegment.videoTimingInfo) : lastSegment.duration + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT;\n  var lastSegmentEnd = new Date(lastSegmentStart.getTime() + lastSegmentDuration * 1000);\n\n  if (dateTimeObject > lastSegmentEnd) {\n    // Beyond the end of the stream, or our best guess of the end of the stream.\n    return null;\n  }\n\n  if (dateTimeObject > lastSegmentStart) {\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : Playlist.duration(playlist, playlist.mediaSequence + playlist.segments.indexOf(segment)),\n    // Although, given that all segments have accurate date time objects, the segment\n    // selected should be accurate, unless the video has been transmuxed at some point\n    // (determined by the presence of the videoTimingInfo object), the segment's \"player\n    // time\" (the start time in the player) can't be considered accurate.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Finds a segment that contains the given player time(in seconds).\n *\n * @param {number} time The player time to find a match for\n * @param {Object} playlist A playlist object to search within\n */\n\n\nvar findSegmentForPlayerTime = function findSegmentForPlayerTime(time, playlist) {\n  // Assumptions:\n  // - there will always be a segment.duration\n  // - we can start from zero\n  // - segments are in time order\n  if (!playlist || !playlist.segments || playlist.segments.length === 0) {\n    return null;\n  }\n\n  var segmentEnd = 0;\n  var segment;\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    segment = playlist.segments[i]; // videoTimingInfo is set after the segment is downloaded and transmuxed, and\n    // should contain the most accurate values we have for the segment's player times.\n    //\n    // Use the accurate transmuxedPresentationEnd value if it is available, otherwise fall\n    // back to an estimate based on the manifest derived (inaccurate) segment.duration, to\n    // calculate an end value.\n\n    segmentEnd = segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationEnd : segmentEnd + segment.duration;\n\n    if (time <= segmentEnd) {\n      break;\n    }\n  }\n\n  var lastSegment = playlist.segments[playlist.segments.length - 1];\n\n  if (lastSegment.videoTimingInfo && lastSegment.videoTimingInfo.transmuxedPresentationEnd < time) {\n    // The time requested is beyond the stream end.\n    return null;\n  }\n\n  if (time > segmentEnd) {\n    // The time is within or beyond the last segment.\n    //\n    // Check to see if the time is beyond a reasonable guess of the end of the stream.\n    if (time > segmentEnd + lastSegment.duration * SEGMENT_END_FUDGE_PERCENT) {\n      // Technically, because the duration value is only an estimate, the time may still\n      // exist in the last segment, however, there isn't enough information to make even\n      // a reasonable estimate.\n      return null;\n    }\n\n    segment = lastSegment;\n  }\n\n  return {\n    segment: segment,\n    estimatedStart: segment.videoTimingInfo ? segment.videoTimingInfo.transmuxedPresentationStart : segmentEnd - segment.duration,\n    // Because videoTimingInfo is only set after transmux, it is the only way to get\n    // accurate timing values.\n    type: segment.videoTimingInfo ? 'accurate' : 'estimate'\n  };\n};\n/**\n * Gives the offset of the comparisonTimestamp from the programTime timestamp in seconds.\n * If the offset returned is positive, the programTime occurs after the\n * comparisonTimestamp.\n * If the offset is negative, the programTime occurs before the comparisonTimestamp.\n *\n * @param {string} comparisonTimeStamp An ISO-8601 timestamp to compare against\n * @param {string} programTime The programTime as an ISO-8601 string\n * @return {number} offset\n */\n\n\nvar getOffsetFromTimestamp = function getOffsetFromTimestamp(comparisonTimeStamp, programTime) {\n  var segmentDateTime;\n  var programDateTime;\n\n  try {\n    segmentDateTime = new Date(comparisonTimeStamp);\n    programDateTime = new Date(programTime);\n  } catch (e) {// TODO handle error\n  }\n\n  var segmentTimeEpoch = segmentDateTime.getTime();\n  var programTimeEpoch = programDateTime.getTime();\n  return (programTimeEpoch - segmentTimeEpoch) / 1000;\n};\n/**\n * Checks that all segments in this playlist have programDateTime tags.\n *\n * @param {Object} playlist A playlist object\n */\n\n\nvar verifyProgramDateTimeTags = function verifyProgramDateTimeTags(playlist) {\n  if (!playlist.segments || playlist.segments.length === 0) {\n    return false;\n  }\n\n  for (var i = 0; i < playlist.segments.length; i++) {\n    var segment = playlist.segments[i];\n\n    if (!segment.dateTimeObject) {\n      return false;\n    }\n  }\n\n  return true;\n};\n/**\n * Returns the programTime of the media given a playlist and a playerTime.\n * The playlist must have programDateTime tags for a programDateTime tag to be returned.\n * If the segments containing the time requested have not been buffered yet, an estimate\n * may be returned to the callback.\n *\n * @param {Object} args\n * @param {Object} args.playlist A playlist object to search within\n * @param {number} time A playerTime in seconds\n * @param {Function} callback(err, programTime)\n * @return {string} err.message A detailed error message\n * @return {Object} programTime\n * @return {number} programTime.mediaSeconds The streamTime in seconds\n * @return {string} programTime.programDateTime The programTime as an ISO-8601 String\n */\n\n\nvar getProgramTime = function getProgramTime(_ref) {\n  var playlist = _ref.playlist,\n      _ref$time = _ref.time,\n      time = _ref$time === void 0 ? undefined : _ref$time,\n      callback = _ref.callback;\n\n  if (!callback) {\n    throw new Error('getProgramTime: callback must be provided');\n  }\n\n  if (!playlist || time === undefined) {\n    return callback({\n      message: 'getProgramTime: playlist and time must be provided'\n    });\n  }\n\n  var matchedSegment = findSegmentForPlayerTime(time, playlist);\n\n  if (!matchedSegment) {\n    return callback({\n      message: 'valid programTime was not found'\n    });\n  }\n\n  if (matchedSegment.type === 'estimate') {\n    return callback({\n      message: 'Accurate programTime could not be determined.' + ' Please seek to e.seekTime and try again',\n      seekTime: matchedSegment.estimatedStart\n    });\n  }\n\n  var programTimeObject = {\n    mediaSeconds: time\n  };\n  var programTime = playerTimeToProgramTime(time, matchedSegment.segment);\n\n  if (programTime) {\n    programTimeObject.programDateTime = programTime.toISOString();\n  }\n\n  return callback(null, programTimeObject);\n};\n/**\n * Seeks in the player to a time that matches the given programTime ISO-8601 string.\n *\n * @param {Object} args\n * @param {string} args.programTime A programTime to seek to as an ISO-8601 String\n * @param {Object} args.playlist A playlist to look within\n * @param {number} args.retryCount The number of times to try for an accurate seek. Default is 2.\n * @param {Function} args.seekTo A method to perform a seek\n * @param {boolean} args.pauseAfterSeek Whether to end in a paused state after seeking. Default is true.\n * @param {Object} args.tech The tech to seek on\n * @param {Function} args.callback(err, newTime) A callback to return the new time to\n * @return {string} err.message A detailed error message\n * @return {number} newTime The exact time that was seeked to in seconds\n */\n\n\nvar seekToProgramTime = function seekToProgramTime(_ref2) {\n  var programTime = _ref2.programTime,\n      playlist = _ref2.playlist,\n      _ref2$retryCount = _ref2.retryCount,\n      retryCount = _ref2$retryCount === void 0 ? 2 : _ref2$retryCount,\n      seekTo = _ref2.seekTo,\n      _ref2$pauseAfterSeek = _ref2.pauseAfterSeek,\n      pauseAfterSeek = _ref2$pauseAfterSeek === void 0 ? true : _ref2$pauseAfterSeek,\n      tech = _ref2.tech,\n      callback = _ref2.callback;\n\n  if (!callback) {\n    throw new Error('seekToProgramTime: callback must be provided');\n  }\n\n  if (typeof programTime === 'undefined' || !playlist || !seekTo) {\n    return callback({\n      message: 'seekToProgramTime: programTime, seekTo and playlist must be provided'\n    });\n  }\n\n  if (!playlist.endList && !tech.hasStarted_) {\n    return callback({\n      message: 'player must be playing a live stream to start buffering'\n    });\n  }\n\n  if (!verifyProgramDateTimeTags(playlist)) {\n    return callback({\n      message: 'programDateTime tags must be provided in the manifest ' + playlist.resolvedUri\n    });\n  }\n\n  var matchedSegment = findSegmentForProgramTime(programTime, playlist); // no match\n\n  if (!matchedSegment) {\n    return callback({\n      message: programTime + \" was not found in the stream\"\n    });\n  }\n\n  var segment = matchedSegment.segment;\n  var mediaOffset = getOffsetFromTimestamp(segment.dateTimeObject, programTime);\n\n  if (matchedSegment.type === 'estimate') {\n    // we've run out of retries\n    if (retryCount === 0) {\n      return callback({\n        message: programTime + \" is not buffered yet. Try again\"\n      });\n    }\n\n    seekTo(matchedSegment.estimatedStart + mediaOffset);\n    tech.one('seeked', function () {\n      seekToProgramTime({\n        programTime: programTime,\n        playlist: playlist,\n        retryCount: retryCount - 1,\n        seekTo: seekTo,\n        pauseAfterSeek: pauseAfterSeek,\n        tech: tech,\n        callback: callback\n      });\n    });\n    return;\n  } // Since the segment.start value is determined from the buffered end or ending time\n  // of the prior segment, the seekToTime doesn't need to account for any transmuxer\n  // modifications.\n\n\n  var seekToTime = segment.start + mediaOffset;\n\n  var seekedCallback = function seekedCallback() {\n    return callback(null, tech.currentTime());\n  }; // listen for seeked event\n\n\n  tech.one('seeked', seekedCallback); // pause before seeking as video.js will restore this state\n\n  if (pauseAfterSeek) {\n    tech.pause();\n  }\n\n  seekTo(seekToTime);\n}; // which will only happen if the request is complete.\n\n\nvar callbackOnCompleted = function callbackOnCompleted(request, cb) {\n  if (request.readyState === 4) {\n    return cb();\n  }\n\n  return;\n};\n\nvar containerRequest = function containerRequest(uri, xhr, cb) {\n  var bytes = [];\n  var id3Offset;\n  var finished = false;\n\n  var endRequestAndCallback = function endRequestAndCallback(err, req, type, _bytes) {\n    req.abort();\n    finished = true;\n    return cb(err, req, type, _bytes);\n  };\n\n  var progressListener = function progressListener(error, request) {\n    if (finished) {\n      return;\n    }\n\n    if (error) {\n      return endRequestAndCallback(error, request, '', bytes);\n    } // grap the new part of content that was just downloaded\n\n\n    var newPart = request.responseText.substring(bytes && bytes.byteLength || 0, request.responseText.length); // add that onto bytes\n\n    bytes = concatTypedArrays(bytes, stringToBytes(newPart, true));\n    id3Offset = id3Offset || getId3Offset(bytes); // we need at least 10 bytes to determine a type\n    // or we need at least two bytes after an id3Offset\n\n    if (bytes.length < 10 || id3Offset && bytes.length < id3Offset + 2) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    var type = detectContainerForBytes(bytes); // if this looks like a ts segment but we don't have enough data\n    // to see the second sync byte, wait until we have enough data\n    // before declaring it ts\n\n    if (type === 'ts' && bytes.length < 188) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    } // this may be an unsynced ts segment\n    // wait for 376 bytes before detecting no container\n\n\n    if (!type && bytes.length < 376) {\n      return callbackOnCompleted(request, function () {\n        return endRequestAndCallback(error, request, '', bytes);\n      });\n    }\n\n    return endRequestAndCallback(null, request, type, bytes);\n  };\n\n  var options = {\n    uri: uri,\n    beforeSend: function beforeSend(request) {\n      // this forces the browser to pass the bytes to us unprocessed\n      request.overrideMimeType('text/plain; charset=x-user-defined');\n      request.addEventListener('progress', function (_ref) {\n        _ref.total;\n        _ref.loaded;\n        return callbackWrapper(request, null, {\n          statusCode: request.status\n        }, progressListener);\n      });\n    }\n  };\n  var request = xhr(options, function (error, response) {\n    return callbackWrapper(request, error, response, progressListener);\n  });\n  return request;\n};\n\nvar EventTarget = videojs.EventTarget,\n    mergeOptions = videojs.mergeOptions;\n\nvar dashPlaylistUnchanged = function dashPlaylistUnchanged(a, b) {\n  if (!isPlaylistUnchanged(a, b)) {\n    return false;\n  } // for dash the above check will often return true in scenarios where\n  // the playlist actually has changed because mediaSequence isn't a\n  // dash thing, and we often set it to 1. So if the playlists have the same amount\n  // of segments we return true.\n  // So for dash we need to make sure that the underlying segments are different.\n  // if sidx changed then the playlists are different.\n\n\n  if (a.sidx && b.sidx && (a.sidx.offset !== b.sidx.offset || a.sidx.length !== b.sidx.length)) {\n    return false;\n  } else if (!a.sidx && b.sidx || a.sidx && !b.sidx) {\n    return false;\n  } // one or the other does not have segments\n  // there was a change.\n\n\n  if (a.segments && !b.segments || !a.segments && b.segments) {\n    return false;\n  } // neither has segments nothing changed\n\n\n  if (!a.segments && !b.segments) {\n    return true;\n  } // check segments themselves\n\n\n  for (var i = 0; i < a.segments.length; i++) {\n    var aSegment = a.segments[i];\n    var bSegment = b.segments[i]; // if uris are different between segments there was a change\n\n    if (aSegment.uri !== bSegment.uri) {\n      return false;\n    } // neither segment has a byterange, there will be no byterange change.\n\n\n    if (!aSegment.byterange && !bSegment.byterange) {\n      continue;\n    }\n\n    var aByterange = aSegment.byterange;\n    var bByterange = bSegment.byterange; // if byterange only exists on one of the segments, there was a change.\n\n    if (aByterange && !bByterange || !aByterange && bByterange) {\n      return false;\n    } // if both segments have byterange with different offsets, there was a change.\n\n\n    if (aByterange.offset !== bByterange.offset || aByterange.length !== bByterange.length) {\n      return false;\n    }\n  } // if everything was the same with segments, this is the same playlist.\n\n\n  return true;\n};\n/**\n * Use the representation IDs from the mpd object to create groupIDs, the NAME is set to mandatory representation\n * ID in the parser. This allows for continuous playout across periods with the same representation IDs\n * (continuous periods as defined in DASH-IF 3.2.12). This is assumed in the mpd-parser as well. If we want to support\n * periods without continuous playback this function may need modification as well as the parser.\n */\n\n\nvar dashGroupId = function dashGroupId(type, group, label, playlist) {\n  // If the manifest somehow does not have an ID (non-dash compliant), use the label.\n  var playlistId = playlist.attributes.NAME || label;\n  return \"placeholder-uri-\" + type + \"-\" + group + \"-\" + playlistId;\n};\n/**\n * Parses the master XML string and updates playlist URI references.\n *\n * @param {Object} config\n *        Object of arguments\n * @param {string} config.masterXml\n *        The mpd XML\n * @param {string} config.srcUrl\n *        The mpd URL\n * @param {Date} config.clientOffset\n *         A time difference between server and client\n * @param {Object} config.sidxMapping\n *        SIDX mappings for moof/mdat URIs and byte ranges\n * @return {Object}\n *         The parsed mpd manifest object\n */\n\n\nvar parseMasterXml = function parseMasterXml(_ref) {\n  var masterXml = _ref.masterXml,\n      srcUrl = _ref.srcUrl,\n      clientOffset = _ref.clientOffset,\n      sidxMapping = _ref.sidxMapping,\n      previousManifest = _ref.previousManifest;\n  var manifest = parse(masterXml, {\n    manifestUri: srcUrl,\n    clientOffset: clientOffset,\n    sidxMapping: sidxMapping,\n    previousManifest: previousManifest\n  });\n  addPropertiesToMaster(manifest, srcUrl, dashGroupId);\n  return manifest;\n};\n/**\n * Removes any mediaGroup labels that no longer exist in the newMaster\n *\n * @param {Object} update\n *         The previous mpd object being updated\n * @param {Object} newMaster\n *         The new mpd object\n */\n\n\nvar removeOldMediaGroupLabels = function removeOldMediaGroupLabels(update, newMaster) {\n  forEachMediaGroup(update, function (properties, type, group, label) {\n    if (!(label in newMaster.mediaGroups[type][group])) {\n      delete update.mediaGroups[type][group][label];\n    }\n  });\n};\n/**\n * Returns a new master manifest that is the result of merging an updated master manifest\n * into the original version.\n *\n * @param {Object} oldMaster\n *        The old parsed mpd object\n * @param {Object} newMaster\n *        The updated parsed mpd object\n * @return {Object}\n *         A new object representing the original master manifest with the updated media\n *         playlists merged in\n */\n\n\nvar updateMaster = function updateMaster(oldMaster, newMaster, sidxMapping) {\n  var noChanges = true;\n  var update = mergeOptions(oldMaster, {\n    // These are top level properties that can be updated\n    duration: newMaster.duration,\n    minimumUpdatePeriod: newMaster.minimumUpdatePeriod,\n    timelineStarts: newMaster.timelineStarts\n  }); // First update the playlists in playlist list\n\n  for (var i = 0; i < newMaster.playlists.length; i++) {\n    var playlist = newMaster.playlists[i];\n\n    if (playlist.sidx) {\n      var sidxKey = generateSidxKey(playlist.sidx); // add sidx segments to the playlist if we have all the sidx info already\n\n      if (sidxMapping && sidxMapping[sidxKey] && sidxMapping[sidxKey].sidx) {\n        addSidxSegmentsToPlaylist(playlist, sidxMapping[sidxKey].sidx, playlist.sidx.resolvedUri);\n      }\n    }\n\n    var playlistUpdate = updateMaster$1(update, playlist, dashPlaylistUnchanged);\n\n    if (playlistUpdate) {\n      update = playlistUpdate;\n      noChanges = false;\n    }\n  } // Then update media group playlists\n\n\n  forEachMediaGroup(newMaster, function (properties, type, group, label) {\n    if (properties.playlists && properties.playlists.length) {\n      var id = properties.playlists[0].id;\n\n      var _playlistUpdate = updateMaster$1(update, properties.playlists[0], dashPlaylistUnchanged);\n\n      if (_playlistUpdate) {\n        update = _playlistUpdate; // add new mediaGroup label if it doesn't exist and assign the new mediaGroup.\n\n        if (!(label in update.mediaGroups[type][group])) {\n          update.mediaGroups[type][group][label] = properties;\n        } // update the playlist reference within media groups\n\n\n        update.mediaGroups[type][group][label].playlists[0] = update.playlists[id];\n        noChanges = false;\n      }\n    }\n  }); // remove mediaGroup labels and references that no longer exist in the newMaster\n\n  removeOldMediaGroupLabels(update, newMaster);\n\n  if (newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n    noChanges = false;\n  }\n\n  if (noChanges) {\n    return null;\n  }\n\n  return update;\n}; // SIDX should be equivalent if the URI and byteranges of the SIDX match.\n// If the SIDXs have maps, the two maps should match,\n// both `a` and `b` missing SIDXs is considered matching.\n// If `a` or `b` but not both have a map, they aren't matching.\n\n\nvar equivalentSidx = function equivalentSidx(a, b) {\n  var neitherMap = Boolean(!a.map && !b.map);\n  var equivalentMap = neitherMap || Boolean(a.map && b.map && a.map.byterange.offset === b.map.byterange.offset && a.map.byterange.length === b.map.byterange.length);\n  return equivalentMap && a.uri === b.uri && a.byterange.offset === b.byterange.offset && a.byterange.length === b.byterange.length;\n}; // exported for testing\n\n\nvar compareSidxEntry = function compareSidxEntry(playlists, oldSidxMapping) {\n  var newSidxMapping = {};\n\n  for (var id in playlists) {\n    var playlist = playlists[id];\n    var currentSidxInfo = playlist.sidx;\n\n    if (currentSidxInfo) {\n      var key = generateSidxKey(currentSidxInfo);\n\n      if (!oldSidxMapping[key]) {\n        break;\n      }\n\n      var savedSidxInfo = oldSidxMapping[key].sidxInfo;\n\n      if (equivalentSidx(savedSidxInfo, currentSidxInfo)) {\n        newSidxMapping[key] = oldSidxMapping[key];\n      }\n    }\n  }\n\n  return newSidxMapping;\n};\n/**\n *  A function that filters out changed items as they need to be requested separately.\n *\n *  The method is exported for testing\n *\n *  @param {Object} master the parsed mpd XML returned via mpd-parser\n *  @param {Object} oldSidxMapping the SIDX to compare against\n */\n\n\nvar filterChangedSidxMappings = function filterChangedSidxMappings(master, oldSidxMapping) {\n  var videoSidx = compareSidxEntry(master.playlists, oldSidxMapping);\n  var mediaGroupSidx = videoSidx;\n  forEachMediaGroup(master, function (properties, mediaType, groupKey, labelKey) {\n    if (properties.playlists && properties.playlists.length) {\n      var playlists = properties.playlists;\n      mediaGroupSidx = mergeOptions(mediaGroupSidx, compareSidxEntry(playlists, oldSidxMapping));\n    }\n  });\n  return mediaGroupSidx;\n};\n\nvar DashPlaylistLoader = /*#__PURE__*/function (_EventTarget) {\n  _inheritsLoose(DashPlaylistLoader, _EventTarget); // DashPlaylistLoader must accept either a src url or a playlist because subsequent\n  // playlist loader setups from media groups will expect to be able to pass a playlist\n  // (since there aren't external URLs to media playlists with DASH)\n\n\n  function DashPlaylistLoader(srcUrlOrPlaylist, vhs, options, masterPlaylistLoader) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _EventTarget.call(this) || this;\n    _this.masterPlaylistLoader_ = masterPlaylistLoader || _assertThisInitialized(_this);\n\n    if (!masterPlaylistLoader) {\n      _this.isMaster_ = true;\n    }\n\n    var _options = options,\n        _options$withCredenti = _options.withCredentials,\n        withCredentials = _options$withCredenti === void 0 ? false : _options$withCredenti,\n        _options$handleManife = _options.handleManifestRedirects,\n        handleManifestRedirects = _options$handleManife === void 0 ? false : _options$handleManife;\n    _this.vhs_ = vhs;\n    _this.withCredentials = withCredentials;\n    _this.handleManifestRedirects = handleManifestRedirects;\n\n    if (!srcUrlOrPlaylist) {\n      throw new Error('A non-empty playlist URL or object is required');\n    } // event naming?\n\n\n    _this.on('minimumUpdatePeriod', function () {\n      _this.refreshXml_();\n    }); // live playlist staleness timeout\n\n\n    _this.on('mediaupdatetimeout', function () {\n      _this.refreshMedia_(_this.media().id);\n    });\n\n    _this.state = 'HAVE_NOTHING';\n    _this.loadedPlaylists_ = {};\n    _this.logger_ = logger('DashPlaylistLoader'); // initialize the loader state\n    // The masterPlaylistLoader will be created with a string\n\n    if (_this.isMaster_) {\n      _this.masterPlaylistLoader_.srcUrl = srcUrlOrPlaylist; // TODO: reset sidxMapping between period changes\n      // once multi-period is refactored\n\n      _this.masterPlaylistLoader_.sidxMapping_ = {};\n    } else {\n      _this.childPlaylist_ = srcUrlOrPlaylist;\n    }\n\n    return _this;\n  }\n\n  var _proto = DashPlaylistLoader.prototype;\n\n  _proto.requestErrored_ = function requestErrored_(err, request, startingState) {\n    // disposed\n    if (!this.request) {\n      return true;\n    } // pending request is cleared\n\n\n    this.request = null;\n\n    if (err) {\n      // use the provided error object or create one\n      // based on the request/response\n      this.error = typeof err === 'object' && !(err instanceof Error) ? err : {\n        status: request.status,\n        message: 'DASH request error at URL: ' + request.uri,\n        response: request.response,\n        // MEDIA_ERR_NETWORK\n        code: 2\n      };\n\n      if (startingState) {\n        this.state = startingState;\n      }\n\n      this.trigger('error');\n      return true;\n    }\n  }\n  /**\n   * Verify that the container of the sidx segment can be parsed\n   * and if it can, get and parse that segment.\n   */\n  ;\n\n  _proto.addSidxSegments_ = function addSidxSegments_(playlist, startingState, cb) {\n    var _this2 = this;\n\n    var sidxKey = playlist.sidx && generateSidxKey(playlist.sidx); // playlist lacks sidx or sidx segments were added to this playlist already.\n\n    if (!playlist.sidx || !sidxKey || this.masterPlaylistLoader_.sidxMapping_[sidxKey]) {\n      // keep this function async\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return cb(false);\n      }, 0);\n      return;\n    } // resolve the segment URL relative to the playlist\n\n\n    var uri = resolveManifestRedirect(this.handleManifestRedirects, playlist.sidx.resolvedUri);\n\n    var fin = function fin(err, request) {\n      if (_this2.requestErrored_(err, request, startingState)) {\n        return;\n      }\n\n      var sidxMapping = _this2.masterPlaylistLoader_.sidxMapping_;\n      var sidx;\n\n      try {\n        sidx = parseSidx(toUint8(request.response).subarray(8));\n      } catch (e) {\n        // sidx parsing failed.\n        _this2.requestErrored_(e, request, startingState);\n\n        return;\n      }\n\n      sidxMapping[sidxKey] = {\n        sidxInfo: playlist.sidx,\n        sidx: sidx\n      };\n      addSidxSegmentsToPlaylist(playlist, sidx, playlist.sidx.resolvedUri);\n      return cb(true);\n    };\n\n    this.request = containerRequest(uri, this.vhs_.xhr, function (err, request, container, bytes) {\n      if (err) {\n        return fin(err, request);\n      }\n\n      if (!container || container !== 'mp4') {\n        return fin({\n          status: request.status,\n          message: \"Unsupported \" + (container || 'unknown') + \" container type for sidx segment at URL: \" + uri,\n          // response is just bytes in this case\n          // but we really don't want to return that.\n          response: '',\n          playlist: playlist,\n          internal: true,\n          blacklistDuration: Infinity,\n          // MEDIA_ERR_NETWORK\n          code: 2\n        }, request);\n      } // if we already downloaded the sidx bytes in the container request, use them\n\n\n      var _playlist$sidx$bytera = playlist.sidx.byterange,\n          offset = _playlist$sidx$bytera.offset,\n          length = _playlist$sidx$bytera.length;\n\n      if (bytes.length >= length + offset) {\n        return fin(err, {\n          response: bytes.subarray(offset, offset + length),\n          status: request.status,\n          uri: request.uri\n        });\n      } // otherwise request sidx bytes\n\n\n      _this2.request = _this2.vhs_.xhr({\n        uri: uri,\n        responseType: 'arraybuffer',\n        headers: segmentXhrHeaders({\n          byterange: playlist.sidx.byterange\n        })\n      }, fin);\n    });\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.stopRequest();\n    this.loadedPlaylists_ = {};\n    window$1.clearTimeout(this.minimumUpdatePeriodTimeout_);\n    window$1.clearTimeout(this.mediaRequest_);\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    this.mediaRequest_ = null;\n    this.minimumUpdatePeriodTimeout_ = null;\n\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.off();\n  };\n\n  _proto.hasPendingRequest = function hasPendingRequest() {\n    return this.request || this.mediaRequest_;\n  };\n\n  _proto.stopRequest = function stopRequest() {\n    if (this.request) {\n      var oldRequest = this.request;\n      this.request = null;\n      oldRequest.onreadystatechange = null;\n      oldRequest.abort();\n    }\n  };\n\n  _proto.media = function media(playlist) {\n    var _this3 = this; // getter\n\n\n    if (!playlist) {\n      return this.media_;\n    } // setter\n\n\n    if (this.state === 'HAVE_NOTHING') {\n      throw new Error('Cannot switch media playlist from ' + this.state);\n    }\n\n    var startingState = this.state; // find the playlist object if the target playlist has been specified by URI\n\n    if (typeof playlist === 'string') {\n      if (!this.masterPlaylistLoader_.master.playlists[playlist]) {\n        throw new Error('Unknown playlist URI: ' + playlist);\n      }\n\n      playlist = this.masterPlaylistLoader_.master.playlists[playlist];\n    }\n\n    var mediaChange = !this.media_ || playlist.id !== this.media_.id; // switch to previously loaded playlists immediately\n\n    if (mediaChange && this.loadedPlaylists_[playlist.id] && this.loadedPlaylists_[playlist.id].endList) {\n      this.state = 'HAVE_METADATA';\n      this.media_ = playlist; // trigger media change if the active media has been updated\n\n      if (mediaChange) {\n        this.trigger('mediachanging');\n        this.trigger('mediachange');\n      }\n\n      return;\n    } // switching to the active playlist is a no-op\n\n\n    if (!mediaChange) {\n      return;\n    } // switching from an already loaded playlist\n\n\n    if (this.media_) {\n      this.trigger('mediachanging');\n    }\n\n    this.addSidxSegments_(playlist, startingState, function (sidxChanged) {\n      // everything is ready just continue to haveMetadata\n      _this3.haveMetadata({\n        startingState: startingState,\n        playlist: playlist\n      });\n    });\n  };\n\n  _proto.haveMetadata = function haveMetadata(_ref2) {\n    var startingState = _ref2.startingState,\n        playlist = _ref2.playlist;\n    this.state = 'HAVE_METADATA';\n    this.loadedPlaylists_[playlist.id] = playlist;\n    this.mediaRequest_ = null; // This will trigger loadedplaylist\n\n    this.refreshMedia_(playlist.id); // fire loadedmetadata the first time a media playlist is loaded\n    // to resolve setup of media groups\n\n    if (startingState === 'HAVE_MASTER') {\n      this.trigger('loadedmetadata');\n    } else {\n      // trigger media change if the active media has been updated\n      this.trigger('mediachange');\n    }\n  };\n\n  _proto.pause = function pause() {\n    if (this.masterPlaylistLoader_.createMupOnMedia_) {\n      this.off('loadedmetadata', this.masterPlaylistLoader_.createMupOnMedia_);\n      this.masterPlaylistLoader_.createMupOnMedia_ = null;\n    }\n\n    this.stopRequest();\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n\n    if (this.isMaster_) {\n      window$1.clearTimeout(this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_);\n      this.masterPlaylistLoader_.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    if (this.state === 'HAVE_NOTHING') {\n      // If we pause the loader before any data has been retrieved, its as if we never\n      // started, so reset to an unstarted state.\n      this.started = false;\n    }\n  };\n\n  _proto.load = function load(isFinalRendition) {\n    var _this4 = this;\n\n    window$1.clearTimeout(this.mediaUpdateTimeout);\n    this.mediaUpdateTimeout = null;\n    var media = this.media();\n\n    if (isFinalRendition) {\n      var delay = media ? media.targetDuration / 2 * 1000 : 5 * 1000;\n      this.mediaUpdateTimeout = window$1.setTimeout(function () {\n        return _this4.load();\n      }, delay);\n      return;\n    } // because the playlists are internal to the manifest, load should either load the\n    // main manifest, or do nothing but trigger an event\n\n\n    if (!this.started) {\n      this.start();\n      return;\n    }\n\n    if (media && !media.endList) {\n      // Check to see if this is the master loader and the MUP was cleared (this happens\n      // when the loader was paused). `media` should be set at this point since one is always\n      // set during `start()`.\n      if (this.isMaster_ && !this.minimumUpdatePeriodTimeout_) {\n        // Trigger minimumUpdatePeriod to refresh the master manifest\n        this.trigger('minimumUpdatePeriod'); // Since there was no prior minimumUpdatePeriodTimeout it should be recreated\n\n        this.updateMinimumUpdatePeriodTimeout_();\n      }\n\n      this.trigger('mediaupdatetimeout');\n    } else {\n      this.trigger('loadedplaylist');\n    }\n  };\n\n  _proto.start = function start() {\n    var _this5 = this;\n\n    this.started = true; // We don't need to request the master manifest again\n    // Call this asynchronously to match the xhr request behavior below\n\n    if (!this.isMaster_) {\n      this.mediaRequest_ = window$1.setTimeout(function () {\n        return _this5.haveMaster_();\n      }, 0);\n      return;\n    }\n\n    this.requestMaster_(function (req, masterChanged) {\n      _this5.haveMaster_();\n\n      if (!_this5.hasPendingRequest() && !_this5.media_) {\n        _this5.media(_this5.masterPlaylistLoader_.master.playlists[0]);\n      }\n    });\n  };\n\n  _proto.requestMaster_ = function requestMaster_(cb) {\n    var _this6 = this;\n\n    this.request = this.vhs_.xhr({\n      uri: this.masterPlaylistLoader_.srcUrl,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      if (_this6.requestErrored_(error, req)) {\n        if (_this6.state === 'HAVE_NOTHING') {\n          _this6.started = false;\n        }\n\n        return;\n      }\n\n      var masterChanged = req.responseText !== _this6.masterPlaylistLoader_.masterXml_;\n      _this6.masterPlaylistLoader_.masterXml_ = req.responseText;\n\n      if (req.responseHeaders && req.responseHeaders.date) {\n        _this6.masterLoaded_ = Date.parse(req.responseHeaders.date);\n      } else {\n        _this6.masterLoaded_ = Date.now();\n      }\n\n      _this6.masterPlaylistLoader_.srcUrl = resolveManifestRedirect(_this6.handleManifestRedirects, _this6.masterPlaylistLoader_.srcUrl, req);\n\n      if (masterChanged) {\n        _this6.handleMaster_();\n\n        _this6.syncClientServerClock_(function () {\n          return cb(req, masterChanged);\n        });\n\n        return;\n      }\n\n      return cb(req, masterChanged);\n    });\n  }\n  /**\n   * Parses the master xml for UTCTiming node to sync the client clock to the server\n   * clock. If the UTCTiming node requires a HEAD or GET request, that request is made.\n   *\n   * @param {Function} done\n   *        Function to call when clock sync has completed\n   */\n  ;\n\n  _proto.syncClientServerClock_ = function syncClientServerClock_(done) {\n    var _this7 = this;\n\n    var utcTiming = parseUTCTiming(this.masterPlaylistLoader_.masterXml_); // No UTCTiming element found in the mpd. Use Date header from mpd request as the\n    // server clock\n\n    if (utcTiming === null) {\n      this.masterPlaylistLoader_.clientOffset_ = this.masterLoaded_ - Date.now();\n      return done();\n    }\n\n    if (utcTiming.method === 'DIRECT') {\n      this.masterPlaylistLoader_.clientOffset_ = utcTiming.value - Date.now();\n      return done();\n    }\n\n    this.request = this.vhs_.xhr({\n      uri: resolveUrl(this.masterPlaylistLoader_.srcUrl, utcTiming.value),\n      method: utcTiming.method,\n      withCredentials: this.withCredentials\n    }, function (error, req) {\n      // disposed\n      if (!_this7.request) {\n        return;\n      }\n\n      if (error) {\n        // sync request failed, fall back to using date header from mpd\n        // TODO: log warning\n        _this7.masterPlaylistLoader_.clientOffset_ = _this7.masterLoaded_ - Date.now();\n        return done();\n      }\n\n      var serverTime;\n\n      if (utcTiming.method === 'HEAD') {\n        if (!req.responseHeaders || !req.responseHeaders.date) {\n          // expected date header not preset, fall back to using date header from mpd\n          // TODO: log warning\n          serverTime = _this7.masterLoaded_;\n        } else {\n          serverTime = Date.parse(req.responseHeaders.date);\n        }\n      } else {\n        serverTime = Date.parse(req.responseText);\n      }\n\n      _this7.masterPlaylistLoader_.clientOffset_ = serverTime - Date.now();\n      done();\n    });\n  };\n\n  _proto.haveMaster_ = function haveMaster_() {\n    this.state = 'HAVE_MASTER';\n\n    if (this.isMaster_) {\n      // We have the master playlist at this point, so\n      // trigger this to allow MasterPlaylistController\n      // to make an initial playlist selection\n      this.trigger('loadedplaylist');\n    } else if (!this.media_) {\n      // no media playlist was specifically selected so select\n      // the one the child playlist loader was created with\n      this.media(this.childPlaylist_);\n    }\n  };\n\n  _proto.handleMaster_ = function handleMaster_() {\n    // clear media request\n    this.mediaRequest_ = null;\n    var oldMaster = this.masterPlaylistLoader_.master;\n    var newMaster = parseMasterXml({\n      masterXml: this.masterPlaylistLoader_.masterXml_,\n      srcUrl: this.masterPlaylistLoader_.srcUrl,\n      clientOffset: this.masterPlaylistLoader_.clientOffset_,\n      sidxMapping: this.masterPlaylistLoader_.sidxMapping_,\n      previousManifest: oldMaster\n    }); // if we have an old master to compare the new master against\n\n    if (oldMaster) {\n      newMaster = updateMaster(oldMaster, newMaster, this.masterPlaylistLoader_.sidxMapping_);\n    } // only update master if we have a new master\n\n\n    this.masterPlaylistLoader_.master = newMaster ? newMaster : oldMaster;\n    var location = this.masterPlaylistLoader_.master.locations && this.masterPlaylistLoader_.master.locations[0];\n\n    if (location && location !== this.masterPlaylistLoader_.srcUrl) {\n      this.masterPlaylistLoader_.srcUrl = location;\n    }\n\n    if (!oldMaster || newMaster && newMaster.minimumUpdatePeriod !== oldMaster.minimumUpdatePeriod) {\n      this.updateMinimumUpdatePeriodTimeout_();\n    }\n\n    return Boolean(newMaster);\n  };\n\n  _proto.updateMinimumUpdatePeriodTimeout_ = function updateMinimumUpdatePeriodTimeout_() {\n    var mpl = this.masterPlaylistLoader_; // cancel any pending creation of mup on media\n    // a new one will be added if needed.\n\n    if (mpl.createMupOnMedia_) {\n      mpl.off('loadedmetadata', mpl.createMupOnMedia_);\n      mpl.createMupOnMedia_ = null;\n    } // clear any pending timeouts\n\n\n    if (mpl.minimumUpdatePeriodTimeout_) {\n      window$1.clearTimeout(mpl.minimumUpdatePeriodTimeout_);\n      mpl.minimumUpdatePeriodTimeout_ = null;\n    }\n\n    var mup = mpl.master && mpl.master.minimumUpdatePeriod; // If the minimumUpdatePeriod has a value of 0, that indicates that the current\n    // MPD has no future validity, so a new one will need to be acquired when new\n    // media segments are to be made available. Thus, we use the target duration\n    // in this case\n\n    if (mup === 0) {\n      if (mpl.media()) {\n        mup = mpl.media().targetDuration * 1000;\n      } else {\n        mpl.createMupOnMedia_ = mpl.updateMinimumUpdatePeriodTimeout_;\n        mpl.one('loadedmetadata', mpl.createMupOnMedia_);\n      }\n    } // if minimumUpdatePeriod is invalid or <= zero, which\n    // can happen when a live video becomes VOD. skip timeout\n    // creation.\n\n\n    if (typeof mup !== 'number' || mup <= 0) {\n      if (mup < 0) {\n        this.logger_(\"found invalid minimumUpdatePeriod of \" + mup + \", not setting a timeout\");\n      }\n\n      return;\n    }\n\n    this.createMUPTimeout_(mup);\n  };\n\n  _proto.createMUPTimeout_ = function createMUPTimeout_(mup) {\n    var mpl = this.masterPlaylistLoader_;\n    mpl.minimumUpdatePeriodTimeout_ = window$1.setTimeout(function () {\n      mpl.minimumUpdatePeriodTimeout_ = null;\n      mpl.trigger('minimumUpdatePeriod');\n      mpl.createMUPTimeout_(mup);\n    }, mup);\n  }\n  /**\n   * Sends request to refresh the master xml and updates the parsed master manifest\n   */\n  ;\n\n  _proto.refreshXml_ = function refreshXml_() {\n    var _this8 = this;\n\n    this.requestMaster_(function (req, masterChanged) {\n      if (!masterChanged) {\n        return;\n      }\n\n      if (_this8.media_) {\n        _this8.media_ = _this8.masterPlaylistLoader_.master.playlists[_this8.media_.id];\n      } // This will filter out updated sidx info from the mapping\n\n\n      _this8.masterPlaylistLoader_.sidxMapping_ = filterChangedSidxMappings(_this8.masterPlaylistLoader_.master, _this8.masterPlaylistLoader_.sidxMapping_);\n\n      _this8.addSidxSegments_(_this8.media(), _this8.state, function (sidxChanged) {\n        // TODO: do we need to reload the current playlist?\n        _this8.refreshMedia_(_this8.media().id);\n      });\n    });\n  }\n  /**\n   * Refreshes the media playlist by re-parsing the master xml and updating playlist\n   * references. If this is an alternate loader, the updated parsed manifest is retrieved\n   * from the master loader.\n   */\n  ;\n\n  _proto.refreshMedia_ = function refreshMedia_(mediaID) {\n    var _this9 = this;\n\n    if (!mediaID) {\n      throw new Error('refreshMedia_ must take a media id');\n    } // for master we have to reparse the master xml\n    // to re-create segments based on current timing values\n    // which may change media. We only skip updating master\n    // if this is the first time this.media_ is being set.\n    // as master was just parsed in that case.\n\n\n    if (this.media_ && this.isMaster_) {\n      this.handleMaster_();\n    }\n\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var mediaChanged = !this.media_ || this.media_ !== playlists[mediaID];\n\n    if (mediaChanged) {\n      this.media_ = playlists[mediaID];\n    } else {\n      this.trigger('playlistunchanged');\n    }\n\n    if (!this.mediaUpdateTimeout) {\n      var createMediaUpdateTimeout = function createMediaUpdateTimeout() {\n        if (_this9.media().endList) {\n          return;\n        }\n\n        _this9.mediaUpdateTimeout = window$1.setTimeout(function () {\n          _this9.trigger('mediaupdatetimeout');\n\n          createMediaUpdateTimeout();\n        }, refreshDelay(_this9.media(), Boolean(mediaChanged)));\n      };\n\n      createMediaUpdateTimeout();\n    }\n\n    this.trigger('loadedplaylist');\n  };\n\n  return DashPlaylistLoader;\n}(EventTarget);\n\nvar Config = {\n  GOAL_BUFFER_LENGTH: 30,\n  MAX_GOAL_BUFFER_LENGTH: 60,\n  BACK_BUFFER_LENGTH: 30,\n  GOAL_BUFFER_LENGTH_RATE: 1,\n  // 0.5 MB/s\n  INITIAL_BANDWIDTH: 4194304,\n  // A fudge factor to apply to advertised playlist bitrates to account for\n  // temporary flucations in client bandwidth\n  BANDWIDTH_VARIANCE: 1.2,\n  // How much of the buffer must be filled before we consider upswitching\n  BUFFER_LOW_WATER_LINE: 0,\n  MAX_BUFFER_LOW_WATER_LINE: 30,\n  // TODO: Remove this when experimentalBufferBasedABR is removed\n  EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE: 16,\n  BUFFER_LOW_WATER_LINE_RATE: 1,\n  // If the buffer is greater than the high water line, we won't switch down\n  BUFFER_HIGH_WATER_LINE: 30\n};\n\nvar stringToArrayBuffer = function stringToArrayBuffer(string) {\n  var view = new Uint8Array(new ArrayBuffer(string.length));\n\n  for (var i = 0; i < string.length; i++) {\n    view[i] = string.charCodeAt(i);\n  }\n\n  return view.buffer;\n};\n/* global Blob, BlobBuilder, Worker */\n// unify worker interface\n\n\nvar browserWorkerPolyFill = function browserWorkerPolyFill(workerObj) {\n  // node only supports on/off\n  workerObj.on = workerObj.addEventListener;\n  workerObj.off = workerObj.removeEventListener;\n  return workerObj;\n};\n\nvar createObjectURL = function createObjectURL(str) {\n  try {\n    return URL.createObjectURL(new Blob([str], {\n      type: 'application/javascript'\n    }));\n  } catch (e) {\n    var blob = new BlobBuilder();\n    blob.append(str);\n    return URL.createObjectURL(blob.getBlob());\n  }\n};\n\nvar factory = function factory(code) {\n  return function () {\n    var objectUrl = createObjectURL(code);\n    var worker = browserWorkerPolyFill(new Worker(objectUrl));\n    worker.objURL = objectUrl;\n    var terminate = worker.terminate;\n    worker.on = worker.addEventListener;\n    worker.off = worker.removeEventListener;\n\n    worker.terminate = function () {\n      URL.revokeObjectURL(objectUrl);\n      return terminate.call(this);\n    };\n\n    return worker;\n  };\n};\n\nvar transform = function transform(code) {\n  return \"var browserWorkerPolyFill = \" + browserWorkerPolyFill.toString() + \";\\n\" + 'browserWorkerPolyFill(self);\\n' + code;\n};\n\nvar getWorkerString = function getWorkerString(fn) {\n  return fn.toString().replace(/^function.+?{/, '').slice(0, -1);\n};\n/* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n\n\nvar workerCode$1 = transform(getWorkerString(function () {\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * A lightweight readable stream implemention that handles event dispatching.\n   * Objects that inherit from streams should call init in their constructors.\n   */\n  var Stream = function Stream() {\n    this.init = function () {\n      var listeners = {};\n      /**\n       * Add a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} the callback to be invoked when an event of\n       * the specified type occurs\n       */\n\n      this.on = function (type, listener) {\n        if (!listeners[type]) {\n          listeners[type] = [];\n        }\n\n        listeners[type] = listeners[type].concat(listener);\n      };\n      /**\n       * Remove a listener for a specified event type.\n       * @param type {string} the event name\n       * @param listener {function} a function previously registered for this\n       * type of event through `on`\n       */\n\n\n      this.off = function (type, listener) {\n        var index;\n\n        if (!listeners[type]) {\n          return false;\n        }\n\n        index = listeners[type].indexOf(listener);\n        listeners[type] = listeners[type].slice();\n        listeners[type].splice(index, 1);\n        return index > -1;\n      };\n      /**\n       * Trigger an event of the specified type on this stream. Any additional\n       * arguments to this function are passed as parameters to event listeners.\n       * @param type {string} the event name\n       */\n\n\n      this.trigger = function (type) {\n        var callbacks, i, length, args;\n        callbacks = listeners[type];\n\n        if (!callbacks) {\n          return;\n        } // Slicing the arguments on every invocation of this method\n        // can add a significant amount of overhead. Avoid the\n        // intermediate object creation for the common case of a\n        // single callback argument\n\n\n        if (arguments.length === 2) {\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].call(this, arguments[1]);\n          }\n        } else {\n          args = [];\n          i = arguments.length;\n\n          for (i = 1; i < arguments.length; ++i) {\n            args.push(arguments[i]);\n          }\n\n          length = callbacks.length;\n\n          for (i = 0; i < length; ++i) {\n            callbacks[i].apply(this, args);\n          }\n        }\n      };\n      /**\n       * Destroys the stream and cleans up.\n       */\n\n\n      this.dispose = function () {\n        listeners = {};\n      };\n    };\n  };\n  /**\n   * Forwards all `data` events on this stream to the destination stream. The\n   * destination stream should provide a method `push` to receive the data\n   * events as they arrive.\n   * @param destination {stream} the stream that will receive all `data` events\n   * @param autoFlush {boolean} if false, we will not call `flush` on the destination\n   *                            when the current stream emits a 'done' event\n   * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n   */\n\n\n  Stream.prototype.pipe = function (destination) {\n    this.on('data', function (data) {\n      destination.push(data);\n    });\n    this.on('done', function (flushSource) {\n      destination.flush(flushSource);\n    });\n    this.on('partialdone', function (flushSource) {\n      destination.partialFlush(flushSource);\n    });\n    this.on('endedtimeline', function (flushSource) {\n      destination.endTimeline(flushSource);\n    });\n    this.on('reset', function (flushSource) {\n      destination.reset(flushSource);\n    });\n    return destination;\n  }; // Default stream functions that are expected to be overridden to perform\n  // actual work. These are provided by the prototype as a sort of no-op\n  // implementation so that we don't have to check for their existence in the\n  // `pipe` function above.\n\n\n  Stream.prototype.push = function (data) {\n    this.trigger('data', data);\n  };\n\n  Stream.prototype.flush = function (flushSource) {\n    this.trigger('done', flushSource);\n  };\n\n  Stream.prototype.partialFlush = function (flushSource) {\n    this.trigger('partialdone', flushSource);\n  };\n\n  Stream.prototype.endTimeline = function (flushSource) {\n    this.trigger('endedtimeline', flushSource);\n  };\n\n  Stream.prototype.reset = function (flushSource) {\n    this.trigger('reset', flushSource);\n  };\n\n  var stream = Stream;\n  var MAX_UINT32$1 = Math.pow(2, 32);\n\n  var getUint64$2 = function getUint64(uint8) {\n    var dv = new DataView(uint8.buffer, uint8.byteOffset, uint8.byteLength);\n    var value;\n\n    if (dv.getBigUint64) {\n      value = dv.getBigUint64(0);\n\n      if (value < Number.MAX_SAFE_INTEGER) {\n        return Number(value);\n      }\n\n      return value;\n    }\n\n    return dv.getUint32(0) * MAX_UINT32$1 + dv.getUint32(4);\n  };\n\n  var numbers = {\n    getUint64: getUint64$2,\n    MAX_UINT32: MAX_UINT32$1\n  };\n  var MAX_UINT32 = numbers.MAX_UINT32;\n  var box, dinf, esds, ftyp, mdat, mfhd, minf, moof, moov, mvex, mvhd, trak, tkhd, mdia, mdhd, hdlr, sdtp, stbl, stsd, traf, trex, trun$1, types, MAJOR_BRAND, MINOR_VERSION, AVC1_BRAND, VIDEO_HDLR, AUDIO_HDLR, HDLR_TYPES, VMHD, SMHD, DREF, STCO, STSC, STSZ, STTS; // pre-calculate constants\n\n  (function () {\n    var i;\n    types = {\n      avc1: [],\n      // codingname\n      avcC: [],\n      btrt: [],\n      dinf: [],\n      dref: [],\n      esds: [],\n      ftyp: [],\n      hdlr: [],\n      mdat: [],\n      mdhd: [],\n      mdia: [],\n      mfhd: [],\n      minf: [],\n      moof: [],\n      moov: [],\n      mp4a: [],\n      // codingname\n      mvex: [],\n      mvhd: [],\n      pasp: [],\n      sdtp: [],\n      smhd: [],\n      stbl: [],\n      stco: [],\n      stsc: [],\n      stsd: [],\n      stsz: [],\n      stts: [],\n      styp: [],\n      tfdt: [],\n      tfhd: [],\n      traf: [],\n      trak: [],\n      trun: [],\n      trex: [],\n      tkhd: [],\n      vmhd: []\n    }; // In environments where Uint8Array is undefined (e.g., IE8), skip set up so that we\n    // don't throw an error\n\n    if (typeof Uint8Array === 'undefined') {\n      return;\n    }\n\n    for (i in types) {\n      if (types.hasOwnProperty(i)) {\n        types[i] = [i.charCodeAt(0), i.charCodeAt(1), i.charCodeAt(2), i.charCodeAt(3)];\n      }\n    }\n\n    MAJOR_BRAND = new Uint8Array(['i'.charCodeAt(0), 's'.charCodeAt(0), 'o'.charCodeAt(0), 'm'.charCodeAt(0)]);\n    AVC1_BRAND = new Uint8Array(['a'.charCodeAt(0), 'v'.charCodeAt(0), 'c'.charCodeAt(0), '1'.charCodeAt(0)]);\n    MINOR_VERSION = new Uint8Array([0, 0, 0, 1]);\n    VIDEO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x76, 0x69, 0x64, 0x65, // handler_type: 'vide'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x56, 0x69, 0x64, 0x65, 0x6f, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'VideoHandler'\n    ]);\n    AUDIO_HDLR = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // pre_defined\n    0x73, 0x6f, 0x75, 0x6e, // handler_type: 'soun'\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x53, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x00 // name: 'SoundHandler'\n    ]);\n    HDLR_TYPES = {\n      video: VIDEO_HDLR,\n      audio: AUDIO_HDLR\n    };\n    DREF = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // entry_count\n    0x00, 0x00, 0x00, 0x0c, // entry_size\n    0x75, 0x72, 0x6c, 0x20, // 'url' type\n    0x00, // version 0\n    0x00, 0x00, 0x01 // entry_flags\n    ]);\n    SMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, // balance, 0 means centered\n    0x00, 0x00 // reserved\n    ]);\n    STCO = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00 // entry_count\n    ]);\n    STSC = STCO;\n    STSZ = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x00, // sample_size\n    0x00, 0x00, 0x00, 0x00 // sample_count\n    ]);\n    STTS = STCO;\n    VMHD = new Uint8Array([0x00, // version\n    0x00, 0x00, 0x01, // flags\n    0x00, 0x00, // graphicsmode\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // opcolor\n    ]);\n  })();\n\n  box = function box(type) {\n    var payload = [],\n        size = 0,\n        i,\n        result,\n        view;\n\n    for (i = 1; i < arguments.length; i++) {\n      payload.push(arguments[i]);\n    }\n\n    i = payload.length; // calculate the total size we need to allocate\n\n    while (i--) {\n      size += payload[i].byteLength;\n    }\n\n    result = new Uint8Array(size + 8);\n    view = new DataView(result.buffer, result.byteOffset, result.byteLength);\n    view.setUint32(0, result.byteLength);\n    result.set(type, 4); // copy the payload into the result\n\n    for (i = 0, size = 8; i < payload.length; i++) {\n      result.set(payload[i], size);\n      size += payload[i].byteLength;\n    }\n\n    return result;\n  };\n\n  dinf = function dinf() {\n    return box(types.dinf, box(types.dref, DREF));\n  };\n\n  esds = function esds(track) {\n    return box(types.esds, new Uint8Array([0x00, // version\n    0x00, 0x00, 0x00, // flags\n    // ES_Descriptor\n    0x03, // tag, ES_DescrTag\n    0x19, // length\n    0x00, 0x00, // ES_ID\n    0x00, // streamDependenceFlag, URL_flag, reserved, streamPriority\n    // DecoderConfigDescriptor\n    0x04, // tag, DecoderConfigDescrTag\n    0x11, // length\n    0x40, // object type\n    0x15, // streamType\n    0x00, 0x06, 0x00, // bufferSizeDB\n    0x00, 0x00, 0xda, 0xc0, // maxBitrate\n    0x00, 0x00, 0xda, 0xc0, // avgBitrate\n    // DecoderSpecificInfo\n    0x05, // tag, DecoderSpecificInfoTag\n    0x02, // length\n    // ISO/IEC 14496-3, AudioSpecificConfig\n    // for samplingFrequencyIndex see ISO/IEC 13818-7:2006, 8.1.3.2.2, Table 35\n    track.audioobjecttype << 3 | track.samplingfrequencyindex >>> 1, track.samplingfrequencyindex << 7 | track.channelcount << 3, 0x06, 0x01, 0x02 // GASpecificConfig\n    ]));\n  };\n\n  ftyp = function ftyp() {\n    return box(types.ftyp, MAJOR_BRAND, MINOR_VERSION, MAJOR_BRAND, AVC1_BRAND);\n  };\n\n  hdlr = function hdlr(type) {\n    return box(types.hdlr, HDLR_TYPES[type]);\n  };\n\n  mdat = function mdat(data) {\n    return box(types.mdat, data);\n  };\n\n  mdhd = function mdhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x02, // creation_time\n    0x00, 0x00, 0x00, 0x03, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    track.duration >>> 24 & 0xFF, track.duration >>> 16 & 0xFF, track.duration >>> 8 & 0xFF, track.duration & 0xFF, // duration\n    0x55, 0xc4, // 'und' language (undetermined)\n    0x00, 0x00]); // Use the sample rate from the track metadata, when it is\n    // defined. The sample rate can be parsed out of an ADTS header, for\n    // instance.\n\n    if (track.samplerate) {\n      result[12] = track.samplerate >>> 24 & 0xFF;\n      result[13] = track.samplerate >>> 16 & 0xFF;\n      result[14] = track.samplerate >>> 8 & 0xFF;\n      result[15] = track.samplerate & 0xFF;\n    }\n\n    return box(types.mdhd, result);\n  };\n\n  mdia = function mdia(track) {\n    return box(types.mdia, mdhd(track), hdlr(track.type), minf(track));\n  };\n\n  mfhd = function mfhd(sequenceNumber) {\n    return box(types.mfhd, new Uint8Array([0x00, 0x00, 0x00, 0x00, // flags\n    (sequenceNumber & 0xFF000000) >> 24, (sequenceNumber & 0xFF0000) >> 16, (sequenceNumber & 0xFF00) >> 8, sequenceNumber & 0xFF // sequence_number\n    ]));\n  };\n\n  minf = function minf(track) {\n    return box(types.minf, track.type === 'video' ? box(types.vmhd, VMHD) : box(types.smhd, SMHD), dinf(), stbl(track));\n  };\n\n  moof = function moof(sequenceNumber, tracks) {\n    var trackFragments = [],\n        i = tracks.length; // build traf boxes for each track fragment\n\n    while (i--) {\n      trackFragments[i] = traf(tracks[i]);\n    }\n\n    return box.apply(null, [types.moof, mfhd(sequenceNumber)].concat(trackFragments));\n  };\n  /**\n   * Returns a movie box.\n   * @param tracks {array} the tracks associated with this movie\n   * @see ISO/IEC 14496-12:2012(E), section 8.2.1\n   */\n\n\n  moov = function moov(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trak(tracks[i]);\n    }\n\n    return box.apply(null, [types.moov, mvhd(0xffffffff)].concat(boxes).concat(mvex(tracks)));\n  };\n\n  mvex = function mvex(tracks) {\n    var i = tracks.length,\n        boxes = [];\n\n    while (i--) {\n      boxes[i] = trex(tracks[i]);\n    }\n\n    return box.apply(null, [types.mvex].concat(boxes));\n  };\n\n  mvhd = function mvhd(duration) {\n    var bytes = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    0x00, 0x00, 0x00, 0x01, // creation_time\n    0x00, 0x00, 0x00, 0x02, // modification_time\n    0x00, 0x01, 0x5f, 0x90, // timescale, 90,000 \"ticks\" per second\n    (duration & 0xFF000000) >> 24, (duration & 0xFF0000) >> 16, (duration & 0xFF00) >> 8, duration & 0xFF, // duration\n    0x00, 0x01, 0x00, 0x00, // 1.0 rate\n    0x01, 0x00, // 1.0 volume\n    0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n    0xff, 0xff, 0xff, 0xff // next_track_ID\n    ]);\n    return box(types.mvhd, bytes);\n  };\n\n  sdtp = function sdtp(track) {\n    var samples = track.samples || [],\n        bytes = new Uint8Array(4 + samples.length),\n        flags,\n        i; // leave the full box header (4 bytes) all zero\n    // write the sample table\n\n    for (i = 0; i < samples.length; i++) {\n      flags = samples[i].flags;\n      bytes[i + 4] = flags.dependsOn << 4 | flags.isDependedOn << 2 | flags.hasRedundancy;\n    }\n\n    return box(types.sdtp, bytes);\n  };\n\n  stbl = function stbl(track) {\n    return box(types.stbl, stsd(track), box(types.stts, STTS), box(types.stsc, STSC), box(types.stsz, STSZ), box(types.stco, STCO));\n  };\n\n  (function () {\n    var videoSample, audioSample;\n\n    stsd = function stsd(track) {\n      return box(types.stsd, new Uint8Array([0x00, // version 0\n      0x00, 0x00, 0x00, // flags\n      0x00, 0x00, 0x00, 0x01]), track.type === 'video' ? videoSample(track) : audioSample(track));\n    };\n\n    videoSample = function videoSample(track) {\n      var sps = track.sps || [],\n          pps = track.pps || [],\n          sequenceParameterSets = [],\n          pictureParameterSets = [],\n          i,\n          avc1Box; // assemble the SPSs\n\n      for (i = 0; i < sps.length; i++) {\n        sequenceParameterSets.push((sps[i].byteLength & 0xFF00) >>> 8);\n        sequenceParameterSets.push(sps[i].byteLength & 0xFF); // sequenceParameterSetLength\n\n        sequenceParameterSets = sequenceParameterSets.concat(Array.prototype.slice.call(sps[i])); // SPS\n      } // assemble the PPSs\n\n\n      for (i = 0; i < pps.length; i++) {\n        pictureParameterSets.push((pps[i].byteLength & 0xFF00) >>> 8);\n        pictureParameterSets.push(pps[i].byteLength & 0xFF);\n        pictureParameterSets = pictureParameterSets.concat(Array.prototype.slice.call(pps[i]));\n      }\n\n      avc1Box = [types.avc1, new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // pre_defined\n      (track.width & 0xff00) >> 8, track.width & 0xff, // width\n      (track.height & 0xff00) >> 8, track.height & 0xff, // height\n      0x00, 0x48, 0x00, 0x00, // horizresolution\n      0x00, 0x48, 0x00, 0x00, // vertresolution\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // frame_count\n      0x13, 0x76, 0x69, 0x64, 0x65, 0x6f, 0x6a, 0x73, 0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x69, 0x62, 0x2d, 0x68, 0x6c, 0x73, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // compressorname\n      0x00, 0x18, // depth = 24\n      0x11, 0x11 // pre_defined = -1\n      ]), box(types.avcC, new Uint8Array([0x01, // configurationVersion\n      track.profileIdc, // AVCProfileIndication\n      track.profileCompatibility, // profile_compatibility\n      track.levelIdc, // AVCLevelIndication\n      0xff // lengthSizeMinusOne, hard-coded to 4 bytes\n      ].concat([sps.length], // numOfSequenceParameterSets\n      sequenceParameterSets, // \"SPS\"\n      [pps.length], // numOfPictureParameterSets\n      pictureParameterSets // \"PPS\"\n      ))), box(types.btrt, new Uint8Array([0x00, 0x1c, 0x9c, 0x80, // bufferSizeDB\n      0x00, 0x2d, 0xc6, 0xc0, // maxBitrate\n      0x00, 0x2d, 0xc6, 0xc0 // avgBitrate\n      ]))];\n\n      if (track.sarRatio) {\n        var hSpacing = track.sarRatio[0],\n            vSpacing = track.sarRatio[1];\n        avc1Box.push(box(types.pasp, new Uint8Array([(hSpacing & 0xFF000000) >> 24, (hSpacing & 0xFF0000) >> 16, (hSpacing & 0xFF00) >> 8, hSpacing & 0xFF, (vSpacing & 0xFF000000) >> 24, (vSpacing & 0xFF0000) >> 16, (vSpacing & 0xFF00) >> 8, vSpacing & 0xFF])));\n      }\n\n      return box.apply(null, avc1Box);\n    };\n\n    audioSample = function audioSample(track) {\n      return box(types.mp4a, new Uint8Array([// SampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x01, // data_reference_index\n      // AudioSampleEntry, ISO/IEC 14496-12\n      0x00, 0x00, 0x00, 0x00, // reserved\n      0x00, 0x00, 0x00, 0x00, // reserved\n      (track.channelcount & 0xff00) >> 8, track.channelcount & 0xff, // channelcount\n      (track.samplesize & 0xff00) >> 8, track.samplesize & 0xff, // samplesize\n      0x00, 0x00, // pre_defined\n      0x00, 0x00, // reserved\n      (track.samplerate & 0xff00) >> 8, track.samplerate & 0xff, 0x00, 0x00 // samplerate, 16.16\n      // MP4AudioSampleEntry, ISO/IEC 14496-14\n      ]), esds(track));\n    };\n  })();\n\n  tkhd = function tkhd(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x07, // flags\n    0x00, 0x00, 0x00, 0x00, // creation_time\n    0x00, 0x00, 0x00, 0x00, // modification_time\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x00, // reserved\n    (track.duration & 0xFF000000) >> 24, (track.duration & 0xFF0000) >> 16, (track.duration & 0xFF00) >> 8, track.duration & 0xFF, // duration\n    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // reserved\n    0x00, 0x00, // layer\n    0x00, 0x00, // alternate_group\n    0x01, 0x00, // non-audio track volume\n    0x00, 0x00, // reserved\n    0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, // transformation: unity matrix\n    (track.width & 0xFF00) >> 8, track.width & 0xFF, 0x00, 0x00, // width\n    (track.height & 0xFF00) >> 8, track.height & 0xFF, 0x00, 0x00 // height\n    ]);\n    return box(types.tkhd, result);\n  };\n  /**\n   * Generate a track fragment (traf) box. A traf box collects metadata\n   * about tracks in a movie fragment (moof) box.\n   */\n\n\n  traf = function traf(track) {\n    var trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable, dataOffset, upperWordBaseMediaDecodeTime, lowerWordBaseMediaDecodeTime;\n    trackFragmentHeader = box(types.tfhd, new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x3a, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x00, 0x00, 0x00 // default_sample_flags\n    ]));\n    upperWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime / MAX_UINT32);\n    lowerWordBaseMediaDecodeTime = Math.floor(track.baseMediaDecodeTime % MAX_UINT32);\n    trackFragmentDecodeTime = box(types.tfdt, new Uint8Array([0x01, // version 1\n    0x00, 0x00, 0x00, // flags\n    // baseMediaDecodeTime\n    upperWordBaseMediaDecodeTime >>> 24 & 0xFF, upperWordBaseMediaDecodeTime >>> 16 & 0xFF, upperWordBaseMediaDecodeTime >>> 8 & 0xFF, upperWordBaseMediaDecodeTime & 0xFF, lowerWordBaseMediaDecodeTime >>> 24 & 0xFF, lowerWordBaseMediaDecodeTime >>> 16 & 0xFF, lowerWordBaseMediaDecodeTime >>> 8 & 0xFF, lowerWordBaseMediaDecodeTime & 0xFF])); // the data offset specifies the number of bytes from the start of\n    // the containing moof to the first payload byte of the associated\n    // mdat\n\n    dataOffset = 32 + // tfhd\n    20 + // tfdt\n    8 + // traf header\n    16 + // mfhd\n    8 + // moof header\n    8; // mdat header\n    // audio tracks require less metadata\n\n    if (track.type === 'audio') {\n      trackFragmentRun = trun$1(track, dataOffset);\n      return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun);\n    } // video tracks should contain an independent and disposable samples\n    // box (sdtp)\n    // generate one and adjust offsets to match\n\n\n    sampleDependencyTable = sdtp(track);\n    trackFragmentRun = trun$1(track, sampleDependencyTable.length + dataOffset);\n    return box(types.traf, trackFragmentHeader, trackFragmentDecodeTime, trackFragmentRun, sampleDependencyTable);\n  };\n  /**\n   * Generate a track box.\n   * @param track {object} a track definition\n   * @return {Uint8Array} the track box\n   */\n\n\n  trak = function trak(track) {\n    track.duration = track.duration || 0xffffffff;\n    return box(types.trak, tkhd(track), mdia(track));\n  };\n\n  trex = function trex(track) {\n    var result = new Uint8Array([0x00, // version 0\n    0x00, 0x00, 0x00, // flags\n    (track.id & 0xFF000000) >> 24, (track.id & 0xFF0000) >> 16, (track.id & 0xFF00) >> 8, track.id & 0xFF, // track_ID\n    0x00, 0x00, 0x00, 0x01, // default_sample_description_index\n    0x00, 0x00, 0x00, 0x00, // default_sample_duration\n    0x00, 0x00, 0x00, 0x00, // default_sample_size\n    0x00, 0x01, 0x00, 0x01 // default_sample_flags\n    ]); // the last two bytes of default_sample_flags is the sample\n    // degradation priority, a hint about the importance of this sample\n    // relative to others. Lower the degradation priority for all sample\n    // types other than video.\n\n    if (track.type !== 'video') {\n      result[result.length - 1] = 0x00;\n    }\n\n    return box(types.trex, result);\n  };\n\n  (function () {\n    var audioTrun, videoTrun, trunHeader; // This method assumes all samples are uniform. That is, if a\n    // duration is present for the first sample, it will be present for\n    // all subsequent samples.\n    // see ISO/IEC 14496-12:2012, Section 8.8.8.1\n\n    trunHeader = function trunHeader(samples, offset) {\n      var durationPresent = 0,\n          sizePresent = 0,\n          flagsPresent = 0,\n          compositionTimeOffset = 0; // trun flag constants\n\n      if (samples.length) {\n        if (samples[0].duration !== undefined) {\n          durationPresent = 0x1;\n        }\n\n        if (samples[0].size !== undefined) {\n          sizePresent = 0x2;\n        }\n\n        if (samples[0].flags !== undefined) {\n          flagsPresent = 0x4;\n        }\n\n        if (samples[0].compositionTimeOffset !== undefined) {\n          compositionTimeOffset = 0x8;\n        }\n      }\n\n      return [0x00, // version 0\n      0x00, durationPresent | sizePresent | flagsPresent | compositionTimeOffset, 0x01, // flags\n      (samples.length & 0xFF000000) >>> 24, (samples.length & 0xFF0000) >>> 16, (samples.length & 0xFF00) >>> 8, samples.length & 0xFF, // sample_count\n      (offset & 0xFF000000) >>> 24, (offset & 0xFF0000) >>> 16, (offset & 0xFF00) >>> 8, offset & 0xFF // data_offset\n      ];\n    };\n\n    videoTrun = function videoTrun(track, offset) {\n      var bytesOffest, bytes, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 16 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 16);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n\n        bytes[bytesOffest++] = sample.flags.isLeading << 2 | sample.flags.dependsOn;\n        bytes[bytesOffest++] = sample.flags.isDependedOn << 6 | sample.flags.hasRedundancy << 4 | sample.flags.paddingValue << 1 | sample.flags.isNonSyncSample;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0xF0 << 8;\n        bytes[bytesOffest++] = sample.flags.degradationPriority & 0x0F; // sample_flags\n\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.compositionTimeOffset & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.compositionTimeOffset & 0xFF; // sample_composition_time_offset\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    audioTrun = function audioTrun(track, offset) {\n      var bytes, bytesOffest, header, samples, sample, i;\n      samples = track.samples || [];\n      offset += 8 + 12 + 8 * samples.length;\n      header = trunHeader(samples, offset);\n      bytes = new Uint8Array(header.length + samples.length * 8);\n      bytes.set(header);\n      bytesOffest = header.length;\n\n      for (i = 0; i < samples.length; i++) {\n        sample = samples[i];\n        bytes[bytesOffest++] = (sample.duration & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.duration & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.duration & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.duration & 0xFF; // sample_duration\n\n        bytes[bytesOffest++] = (sample.size & 0xFF000000) >>> 24;\n        bytes[bytesOffest++] = (sample.size & 0xFF0000) >>> 16;\n        bytes[bytesOffest++] = (sample.size & 0xFF00) >>> 8;\n        bytes[bytesOffest++] = sample.size & 0xFF; // sample_size\n      }\n\n      return box(types.trun, bytes);\n    };\n\n    trun$1 = function trun(track, offset) {\n      if (track.type === 'audio') {\n        return audioTrun(track, offset);\n      }\n\n      return videoTrun(track, offset);\n    };\n  })();\n\n  var mp4Generator = {\n    ftyp: ftyp,\n    mdat: mdat,\n    moof: moof,\n    moov: moov,\n    initSegment: function initSegment(tracks) {\n      var fileType = ftyp(),\n          movie = moov(tracks),\n          result;\n      result = new Uint8Array(fileType.byteLength + movie.byteLength);\n      result.set(fileType);\n      result.set(movie, fileType.byteLength);\n      return result;\n    }\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n  // Convert an array of nal units into an array of frames with each frame being\n  // composed of the nal units that make up that frame\n  // Also keep track of cummulative data about the frame from the nal units such\n  // as the frame duration, starting pts, etc.\n\n  var groupNalsIntoFrames = function groupNalsIntoFrames(nalUnits) {\n    var i,\n        currentNal,\n        currentFrame = [],\n        frames = []; // TODO added for LHLS, make sure this is OK\n\n    frames.byteLength = 0;\n    frames.nalCount = 0;\n    frames.duration = 0;\n    currentFrame.byteLength = 0;\n\n    for (i = 0; i < nalUnits.length; i++) {\n      currentNal = nalUnits[i]; // Split on 'aud'-type nal units\n\n      if (currentNal.nalUnitType === 'access_unit_delimiter_rbsp') {\n        // Since the very first nal unit is expected to be an AUD\n        // only push to the frames array when currentFrame is not empty\n        if (currentFrame.length) {\n          currentFrame.duration = currentNal.dts - currentFrame.dts; // TODO added for LHLS, make sure this is OK\n\n          frames.byteLength += currentFrame.byteLength;\n          frames.nalCount += currentFrame.length;\n          frames.duration += currentFrame.duration;\n          frames.push(currentFrame);\n        }\n\n        currentFrame = [currentNal];\n        currentFrame.byteLength = currentNal.data.byteLength;\n        currentFrame.pts = currentNal.pts;\n        currentFrame.dts = currentNal.dts;\n      } else {\n        // Specifically flag key frames for ease of use later\n        if (currentNal.nalUnitType === 'slice_layer_without_partitioning_rbsp_idr') {\n          currentFrame.keyFrame = true;\n        }\n\n        currentFrame.duration = currentNal.dts - currentFrame.dts;\n        currentFrame.byteLength += currentNal.data.byteLength;\n        currentFrame.push(currentNal);\n      }\n    } // For the last frame, use the duration of the previous frame if we\n    // have nothing better to go on\n\n\n    if (frames.length && (!currentFrame.duration || currentFrame.duration <= 0)) {\n      currentFrame.duration = frames[frames.length - 1].duration;\n    } // Push the final frame\n    // TODO added for LHLS, make sure this is OK\n\n\n    frames.byteLength += currentFrame.byteLength;\n    frames.nalCount += currentFrame.length;\n    frames.duration += currentFrame.duration;\n    frames.push(currentFrame);\n    return frames;\n  }; // Convert an array of frames into an array of Gop with each Gop being composed\n  // of the frames that make up that Gop\n  // Also keep track of cummulative data about the Gop from the frames such as the\n  // Gop duration, starting pts, etc.\n\n\n  var groupFramesIntoGops = function groupFramesIntoGops(frames) {\n    var i,\n        currentFrame,\n        currentGop = [],\n        gops = []; // We must pre-set some of the values on the Gop since we\n    // keep running totals of these values\n\n    currentGop.byteLength = 0;\n    currentGop.nalCount = 0;\n    currentGop.duration = 0;\n    currentGop.pts = frames[0].pts;\n    currentGop.dts = frames[0].dts; // store some metadata about all the Gops\n\n    gops.byteLength = 0;\n    gops.nalCount = 0;\n    gops.duration = 0;\n    gops.pts = frames[0].pts;\n    gops.dts = frames[0].dts;\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n\n      if (currentFrame.keyFrame) {\n        // Since the very first frame is expected to be an keyframe\n        // only push to the gops array when currentGop is not empty\n        if (currentGop.length) {\n          gops.push(currentGop);\n          gops.byteLength += currentGop.byteLength;\n          gops.nalCount += currentGop.nalCount;\n          gops.duration += currentGop.duration;\n        }\n\n        currentGop = [currentFrame];\n        currentGop.nalCount = currentFrame.length;\n        currentGop.byteLength = currentFrame.byteLength;\n        currentGop.pts = currentFrame.pts;\n        currentGop.dts = currentFrame.dts;\n        currentGop.duration = currentFrame.duration;\n      } else {\n        currentGop.duration += currentFrame.duration;\n        currentGop.nalCount += currentFrame.length;\n        currentGop.byteLength += currentFrame.byteLength;\n        currentGop.push(currentFrame);\n      }\n    }\n\n    if (gops.length && currentGop.duration <= 0) {\n      currentGop.duration = gops[gops.length - 1].duration;\n    }\n\n    gops.byteLength += currentGop.byteLength;\n    gops.nalCount += currentGop.nalCount;\n    gops.duration += currentGop.duration; // push the final Gop\n\n    gops.push(currentGop);\n    return gops;\n  };\n  /*\n   * Search for the first keyframe in the GOPs and throw away all frames\n   * until that keyframe. Then extend the duration of the pulled keyframe\n   * and pull the PTS and DTS of the keyframe so that it covers the time\n   * range of the frames that were disposed.\n   *\n   * @param {Array} gops video GOPs\n   * @returns {Array} modified video GOPs\n   */\n\n\n  var extendFirstKeyFrame = function extendFirstKeyFrame(gops) {\n    var currentGop;\n\n    if (!gops[0][0].keyFrame && gops.length > 1) {\n      // Remove the first GOP\n      currentGop = gops.shift();\n      gops.byteLength -= currentGop.byteLength;\n      gops.nalCount -= currentGop.nalCount; // Extend the first frame of what is now the\n      // first gop to cover the time period of the\n      // frames we just removed\n\n      gops[0][0].dts = currentGop.dts;\n      gops[0][0].pts = currentGop.pts;\n      gops[0][0].duration += currentGop.duration;\n    }\n\n    return gops;\n  };\n  /**\n   * Default sample object\n   * see ISO/IEC 14496-12:2012, section 8.6.4.3\n   */\n\n\n  var createDefaultSample = function createDefaultSample() {\n    return {\n      size: 0,\n      flags: {\n        isLeading: 0,\n        dependsOn: 1,\n        isDependedOn: 0,\n        hasRedundancy: 0,\n        degradationPriority: 0,\n        isNonSyncSample: 1\n      }\n    };\n  };\n  /*\n   * Collates information from a video frame into an object for eventual\n   * entry into an MP4 sample table.\n   *\n   * @param {Object} frame the video frame\n   * @param {Number} dataOffset the byte offset to position the sample\n   * @return {Object} object containing sample table info for a frame\n   */\n\n\n  var sampleForFrame = function sampleForFrame(frame, dataOffset) {\n    var sample = createDefaultSample();\n    sample.dataOffset = dataOffset;\n    sample.compositionTimeOffset = frame.pts - frame.dts;\n    sample.duration = frame.duration;\n    sample.size = 4 * frame.length; // Space for nal unit size\n\n    sample.size += frame.byteLength;\n\n    if (frame.keyFrame) {\n      sample.flags.dependsOn = 2;\n      sample.flags.isNonSyncSample = 0;\n    }\n\n    return sample;\n  }; // generate the track's sample table from an array of gops\n\n\n  var generateSampleTable$1 = function generateSampleTable(gops, baseDataOffset) {\n    var h,\n        i,\n        sample,\n        currentGop,\n        currentFrame,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h];\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i];\n        sample = sampleForFrame(currentFrame, dataOffset);\n        dataOffset += sample.size;\n        samples.push(sample);\n      }\n    }\n\n    return samples;\n  }; // generate the track's raw mdat data from an array of gops\n\n\n  var concatenateNalData = function concatenateNalData(gops) {\n    var h,\n        i,\n        j,\n        currentGop,\n        currentFrame,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = gops.byteLength,\n        numberOfNals = gops.nalCount,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each Gop..\n\n    for (h = 0; h < gops.length; h++) {\n      currentGop = gops[h]; // For each Frame..\n\n      for (i = 0; i < currentGop.length; i++) {\n        currentFrame = currentGop[i]; // For each NAL..\n\n        for (j = 0; j < currentFrame.length; j++) {\n          currentNal = currentFrame[j];\n          view.setUint32(dataOffset, currentNal.data.byteLength);\n          dataOffset += 4;\n          data.set(currentNal.data, dataOffset);\n          dataOffset += currentNal.data.byteLength;\n        }\n      }\n    }\n\n    return data;\n  }; // generate the track's sample table from a frame\n\n\n  var generateSampleTableForFrame = function generateSampleTableForFrame(frame, baseDataOffset) {\n    var sample,\n        dataOffset = baseDataOffset || 0,\n        samples = [];\n    sample = sampleForFrame(frame, dataOffset);\n    samples.push(sample);\n    return samples;\n  }; // generate the track's raw mdat data from a frame\n\n\n  var concatenateNalDataForFrame = function concatenateNalDataForFrame(frame) {\n    var i,\n        currentNal,\n        dataOffset = 0,\n        nalsByteLength = frame.byteLength,\n        numberOfNals = frame.length,\n        totalByteLength = nalsByteLength + 4 * numberOfNals,\n        data = new Uint8Array(totalByteLength),\n        view = new DataView(data.buffer); // For each NAL..\n\n    for (i = 0; i < frame.length; i++) {\n      currentNal = frame[i];\n      view.setUint32(dataOffset, currentNal.data.byteLength);\n      dataOffset += 4;\n      data.set(currentNal.data, dataOffset);\n      dataOffset += currentNal.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var frameUtils = {\n    groupNalsIntoFrames: groupNalsIntoFrames,\n    groupFramesIntoGops: groupFramesIntoGops,\n    extendFirstKeyFrame: extendFirstKeyFrame,\n    generateSampleTable: generateSampleTable$1,\n    concatenateNalData: concatenateNalData,\n    generateSampleTableForFrame: generateSampleTableForFrame,\n    concatenateNalDataForFrame: concatenateNalDataForFrame\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var highPrefix = [33, 16, 5, 32, 164, 27];\n  var lowPrefix = [33, 65, 108, 84, 1, 2, 4, 8, 168, 2, 4, 8, 17, 191, 252];\n\n  var zeroFill = function zeroFill(count) {\n    var a = [];\n\n    while (count--) {\n      a.push(0);\n    }\n\n    return a;\n  };\n\n  var makeTable = function makeTable(metaTable) {\n    return Object.keys(metaTable).reduce(function (obj, key) {\n      obj[key] = new Uint8Array(metaTable[key].reduce(function (arr, part) {\n        return arr.concat(part);\n      }, []));\n      return obj;\n    }, {});\n  };\n\n  var silence;\n\n  var silence_1 = function silence_1() {\n    if (!silence) {\n      // Frames-of-silence to use for filling in missing AAC frames\n      var coneOfSilence = {\n        96000: [highPrefix, [227, 64], zeroFill(154), [56]],\n        88200: [highPrefix, [231], zeroFill(170), [56]],\n        64000: [highPrefix, [248, 192], zeroFill(240), [56]],\n        48000: [highPrefix, [255, 192], zeroFill(268), [55, 148, 128], zeroFill(54), [112]],\n        44100: [highPrefix, [255, 192], zeroFill(268), [55, 163, 128], zeroFill(84), [112]],\n        32000: [highPrefix, [255, 192], zeroFill(268), [55, 234], zeroFill(226), [112]],\n        24000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 112], zeroFill(126), [224]],\n        16000: [highPrefix, [255, 192], zeroFill(268), [55, 255, 128], zeroFill(268), [111, 255], zeroFill(269), [223, 108], zeroFill(195), [1, 192]],\n        12000: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 253, 128], zeroFill(259), [56]],\n        11025: [lowPrefix, zeroFill(268), [3, 127, 248], zeroFill(268), [6, 255, 240], zeroFill(268), [13, 255, 224], zeroFill(268), [27, 255, 192], zeroFill(268), [55, 175, 128], zeroFill(108), [112]],\n        8000: [lowPrefix, zeroFill(268), [3, 121, 16], zeroFill(47), [7]]\n      };\n      silence = makeTable(coneOfSilence);\n    }\n\n    return silence;\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n\n  var ONE_SECOND_IN_TS$4 = 90000,\n      // 90kHz clock\n  secondsToVideoTs,\n      secondsToAudioTs,\n      videoTsToSeconds,\n      audioTsToSeconds,\n      audioTsToVideoTs,\n      videoTsToAudioTs,\n      metadataTsToSeconds;\n\n  secondsToVideoTs = function secondsToVideoTs(seconds) {\n    return seconds * ONE_SECOND_IN_TS$4;\n  };\n\n  secondsToAudioTs = function secondsToAudioTs(seconds, sampleRate) {\n    return seconds * sampleRate;\n  };\n\n  videoTsToSeconds = function videoTsToSeconds(timestamp) {\n    return timestamp / ONE_SECOND_IN_TS$4;\n  };\n\n  audioTsToSeconds = function audioTsToSeconds(timestamp, sampleRate) {\n    return timestamp / sampleRate;\n  };\n\n  audioTsToVideoTs = function audioTsToVideoTs(timestamp, sampleRate) {\n    return secondsToVideoTs(audioTsToSeconds(timestamp, sampleRate));\n  };\n\n  videoTsToAudioTs = function videoTsToAudioTs(timestamp, sampleRate) {\n    return secondsToAudioTs(videoTsToSeconds(timestamp), sampleRate);\n  };\n  /**\n   * Adjust ID3 tag or caption timing information by the timeline pts values\n   * (if keepOriginalTimestamps is false) and convert to seconds\n   */\n\n\n  metadataTsToSeconds = function metadataTsToSeconds(timestamp, timelineStartPts, keepOriginalTimestamps) {\n    return videoTsToSeconds(keepOriginalTimestamps ? timestamp : timestamp - timelineStartPts);\n  };\n\n  var clock = {\n    ONE_SECOND_IN_TS: ONE_SECOND_IN_TS$4,\n    secondsToVideoTs: secondsToVideoTs,\n    secondsToAudioTs: secondsToAudioTs,\n    videoTsToSeconds: videoTsToSeconds,\n    audioTsToSeconds: audioTsToSeconds,\n    audioTsToVideoTs: audioTsToVideoTs,\n    videoTsToAudioTs: videoTsToAudioTs,\n    metadataTsToSeconds: metadataTsToSeconds\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  /**\n   * Sum the `byteLength` properties of the data in each AAC frame\n   */\n\n  var sumFrameByteLengths = function sumFrameByteLengths(array) {\n    var i,\n        currentObj,\n        sum = 0; // sum the byteLength's all each nal unit in the frame\n\n    for (i = 0; i < array.length; i++) {\n      currentObj = array[i];\n      sum += currentObj.data.byteLength;\n    }\n\n    return sum;\n  }; // Possibly pad (prefix) the audio track with silence if appending this track\n  // would lead to the introduction of a gap in the audio buffer\n\n\n  var prefixWithSilence = function prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime) {\n    var baseMediaDecodeTimeTs,\n        frameDuration = 0,\n        audioGapDuration = 0,\n        audioFillFrameCount = 0,\n        audioFillDuration = 0,\n        silentFrame,\n        i,\n        firstFrame;\n\n    if (!frames.length) {\n      return;\n    }\n\n    baseMediaDecodeTimeTs = clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate); // determine frame clock duration based on sample rate, round up to avoid overfills\n\n    frameDuration = Math.ceil(clock.ONE_SECOND_IN_TS / (track.samplerate / 1024));\n\n    if (audioAppendStartTs && videoBaseMediaDecodeTime) {\n      // insert the shortest possible amount (audio gap or audio to video gap)\n      audioGapDuration = baseMediaDecodeTimeTs - Math.max(audioAppendStartTs, videoBaseMediaDecodeTime); // number of full frames in the audio gap\n\n      audioFillFrameCount = Math.floor(audioGapDuration / frameDuration);\n      audioFillDuration = audioFillFrameCount * frameDuration;\n    } // don't attempt to fill gaps smaller than a single frame or larger\n    // than a half second\n\n\n    if (audioFillFrameCount < 1 || audioFillDuration > clock.ONE_SECOND_IN_TS / 2) {\n      return;\n    }\n\n    silentFrame = silence_1()[track.samplerate];\n\n    if (!silentFrame) {\n      // we don't have a silent frame pregenerated for the sample rate, so use a frame\n      // from the content instead\n      silentFrame = frames[0].data;\n    }\n\n    for (i = 0; i < audioFillFrameCount; i++) {\n      firstFrame = frames[0];\n      frames.splice(0, 0, {\n        data: silentFrame,\n        dts: firstFrame.dts - frameDuration,\n        pts: firstFrame.pts - frameDuration\n      });\n    }\n\n    track.baseMediaDecodeTime -= Math.floor(clock.videoTsToAudioTs(audioFillDuration, track.samplerate));\n    return audioFillDuration;\n  }; // If the audio segment extends before the earliest allowed dts\n  // value, remove AAC frames until starts at or after the earliest\n  // allowed DTS so that we don't end up with a negative baseMedia-\n  // DecodeTime for the audio track\n\n\n  var trimAdtsFramesByEarliestDts = function trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts) {\n    if (track.minSegmentDts >= earliestAllowedDts) {\n      return adtsFrames;\n    } // We will need to recalculate the earliest segment Dts\n\n\n    track.minSegmentDts = Infinity;\n    return adtsFrames.filter(function (currentFrame) {\n      // If this is an allowed frame, keep it and record it's Dts\n      if (currentFrame.dts >= earliestAllowedDts) {\n        track.minSegmentDts = Math.min(track.minSegmentDts, currentFrame.dts);\n        track.minSegmentPts = track.minSegmentDts;\n        return true;\n      } // Otherwise, discard it\n\n\n      return false;\n    });\n  }; // generate the track's raw mdat data from an array of frames\n\n\n  var generateSampleTable = function generateSampleTable(frames) {\n    var i,\n        currentFrame,\n        samples = [];\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      samples.push({\n        size: currentFrame.data.byteLength,\n        duration: 1024 // For AAC audio, all samples contain 1024 samples\n\n      });\n    }\n\n    return samples;\n  }; // generate the track's sample table from an array of frames\n\n\n  var concatenateFrameData = function concatenateFrameData(frames) {\n    var i,\n        currentFrame,\n        dataOffset = 0,\n        data = new Uint8Array(sumFrameByteLengths(frames));\n\n    for (i = 0; i < frames.length; i++) {\n      currentFrame = frames[i];\n      data.set(currentFrame.data, dataOffset);\n      dataOffset += currentFrame.data.byteLength;\n    }\n\n    return data;\n  };\n\n  var audioFrameUtils = {\n    prefixWithSilence: prefixWithSilence,\n    trimAdtsFramesByEarliestDts: trimAdtsFramesByEarliestDts,\n    generateSampleTable: generateSampleTable,\n    concatenateFrameData: concatenateFrameData\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ONE_SECOND_IN_TS$3 = clock.ONE_SECOND_IN_TS;\n  /**\n   * Store information about the start and end of the track and the\n   * duration for each frame/sample we process in order to calculate\n   * the baseMediaDecodeTime\n   */\n\n  var collectDtsInfo = function collectDtsInfo(track, data) {\n    if (typeof data.pts === 'number') {\n      if (track.timelineStartInfo.pts === undefined) {\n        track.timelineStartInfo.pts = data.pts;\n      }\n\n      if (track.minSegmentPts === undefined) {\n        track.minSegmentPts = data.pts;\n      } else {\n        track.minSegmentPts = Math.min(track.minSegmentPts, data.pts);\n      }\n\n      if (track.maxSegmentPts === undefined) {\n        track.maxSegmentPts = data.pts;\n      } else {\n        track.maxSegmentPts = Math.max(track.maxSegmentPts, data.pts);\n      }\n    }\n\n    if (typeof data.dts === 'number') {\n      if (track.timelineStartInfo.dts === undefined) {\n        track.timelineStartInfo.dts = data.dts;\n      }\n\n      if (track.minSegmentDts === undefined) {\n        track.minSegmentDts = data.dts;\n      } else {\n        track.minSegmentDts = Math.min(track.minSegmentDts, data.dts);\n      }\n\n      if (track.maxSegmentDts === undefined) {\n        track.maxSegmentDts = data.dts;\n      } else {\n        track.maxSegmentDts = Math.max(track.maxSegmentDts, data.dts);\n      }\n    }\n  };\n  /**\n   * Clear values used to calculate the baseMediaDecodeTime between\n   * tracks\n   */\n\n\n  var clearDtsInfo = function clearDtsInfo(track) {\n    delete track.minSegmentDts;\n    delete track.maxSegmentDts;\n    delete track.minSegmentPts;\n    delete track.maxSegmentPts;\n  };\n  /**\n   * Calculate the track's baseMediaDecodeTime based on the earliest\n   * DTS the transmuxer has ever seen and the minimum DTS for the\n   * current track\n   * @param track {object} track metadata configuration\n   * @param keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  var calculateTrackBaseMediaDecodeTime = function calculateTrackBaseMediaDecodeTime(track, keepOriginalTimestamps) {\n    var baseMediaDecodeTime,\n        scale,\n        minSegmentDts = track.minSegmentDts; // Optionally adjust the time so the first segment starts at zero.\n\n    if (!keepOriginalTimestamps) {\n      minSegmentDts -= track.timelineStartInfo.dts;\n    } // track.timelineStartInfo.baseMediaDecodeTime is the location, in time, where\n    // we want the start of the first segment to be placed\n\n\n    baseMediaDecodeTime = track.timelineStartInfo.baseMediaDecodeTime; // Add to that the distance this segment is from the very first\n\n    baseMediaDecodeTime += minSegmentDts; // baseMediaDecodeTime must not become negative\n\n    baseMediaDecodeTime = Math.max(0, baseMediaDecodeTime);\n\n    if (track.type === 'audio') {\n      // Audio has a different clock equal to the sampling_rate so we need to\n      // scale the PTS values into the clock rate of the track\n      scale = track.samplerate / ONE_SECOND_IN_TS$3;\n      baseMediaDecodeTime *= scale;\n      baseMediaDecodeTime = Math.floor(baseMediaDecodeTime);\n    }\n\n    return baseMediaDecodeTime;\n  };\n\n  var trackDecodeInfo = {\n    clearDtsInfo: clearDtsInfo,\n    calculateTrackBaseMediaDecodeTime: calculateTrackBaseMediaDecodeTime,\n    collectDtsInfo: collectDtsInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Reads in-band caption information from a video elementary\n   * stream. Captions must follow the CEA-708 standard for injection\n   * into an MPEG-2 transport streams.\n   * @see https://en.wikipedia.org/wiki/CEA-708\n   * @see https://www.gpo.gov/fdsys/pkg/CFR-2007-title47-vol1/pdf/CFR-2007-title47-vol1-sec15-119.pdf\n   */\n  // payload type field to indicate how they are to be\n  // interpreted. CEAS-708 caption content is always transmitted with\n  // payload type 0x04.\n\n  var USER_DATA_REGISTERED_ITU_T_T35 = 4,\n      RBSP_TRAILING_BITS = 128;\n  /**\n    * Parse a supplemental enhancement information (SEI) NAL unit.\n    * Stops parsing once a message of type ITU T T35 has been found.\n    *\n    * @param bytes {Uint8Array} the bytes of a SEI NAL unit\n    * @return {object} the parsed SEI payload\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n    */\n\n  var parseSei = function parseSei(bytes) {\n    var i = 0,\n        result = {\n      payloadType: -1,\n      payloadSize: 0\n    },\n        payloadType = 0,\n        payloadSize = 0; // go through the sei_rbsp parsing each each individual sei_message\n\n    while (i < bytes.byteLength) {\n      // stop once we have hit the end of the sei_rbsp\n      if (bytes[i] === RBSP_TRAILING_BITS) {\n        break;\n      } // Parse payload type\n\n\n      while (bytes[i] === 0xFF) {\n        payloadType += 255;\n        i++;\n      }\n\n      payloadType += bytes[i++]; // Parse payload size\n\n      while (bytes[i] === 0xFF) {\n        payloadSize += 255;\n        i++;\n      }\n\n      payloadSize += bytes[i++]; // this sei_message is a 608/708 caption so save it and break\n      // there can only ever be one caption message in a frame's sei\n\n      if (!result.payload && payloadType === USER_DATA_REGISTERED_ITU_T_T35) {\n        var userIdentifier = String.fromCharCode(bytes[i + 3], bytes[i + 4], bytes[i + 5], bytes[i + 6]);\n\n        if (userIdentifier === 'GA94') {\n          result.payloadType = payloadType;\n          result.payloadSize = payloadSize;\n          result.payload = bytes.subarray(i, i + payloadSize);\n          break;\n        } else {\n          result.payload = void 0;\n        }\n      } // skip the payload and parse the next message\n\n\n      i += payloadSize;\n      payloadType = 0;\n      payloadSize = 0;\n    }\n\n    return result;\n  }; // see ANSI/SCTE 128-1 (2013), section 8.1\n\n\n  var parseUserData = function parseUserData(sei) {\n    // itu_t_t35_contry_code must be 181 (United States) for\n    // captions\n    if (sei.payload[0] !== 181) {\n      return null;\n    } // itu_t_t35_provider_code should be 49 (ATSC) for captions\n\n\n    if ((sei.payload[1] << 8 | sei.payload[2]) !== 49) {\n      return null;\n    } // the user_identifier should be \"GA94\" to indicate ATSC1 data\n\n\n    if (String.fromCharCode(sei.payload[3], sei.payload[4], sei.payload[5], sei.payload[6]) !== 'GA94') {\n      return null;\n    } // finally, user_data_type_code should be 0x03 for caption data\n\n\n    if (sei.payload[7] !== 0x03) {\n      return null;\n    } // return the user_data_type_structure and strip the trailing\n    // marker bits\n\n\n    return sei.payload.subarray(8, sei.payload.length - 1);\n  }; // see CEA-708-D, section 4.4\n\n\n  var parseCaptionPackets = function parseCaptionPackets(pts, userData) {\n    var results = [],\n        i,\n        count,\n        offset,\n        data; // if this is just filler, return immediately\n\n    if (!(userData[0] & 0x40)) {\n      return results;\n    } // parse out the cc_data_1 and cc_data_2 fields\n\n\n    count = userData[0] & 0x1f;\n\n    for (i = 0; i < count; i++) {\n      offset = i * 3;\n      data = {\n        type: userData[offset + 2] & 0x03,\n        pts: pts\n      }; // capture cc data when cc_valid is 1\n\n      if (userData[offset + 2] & 0x04) {\n        data.ccData = userData[offset + 3] << 8 | userData[offset + 4];\n        results.push(data);\n      }\n    }\n\n    return results;\n  };\n\n  var discardEmulationPreventionBytes$1 = function discardEmulationPreventionBytes(data) {\n    var length = data.byteLength,\n        emulationPreventionBytesPositions = [],\n        i = 1,\n        newLength,\n        newData; // Find all `Emulation Prevention Bytes`\n\n    while (i < length - 2) {\n      if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n        emulationPreventionBytesPositions.push(i + 2);\n        i += 2;\n      } else {\n        i++;\n      }\n    } // If no Emulation Prevention Bytes were found just return the original\n    // array\n\n\n    if (emulationPreventionBytesPositions.length === 0) {\n      return data;\n    } // Create a new array to hold the NAL unit data\n\n\n    newLength = length - emulationPreventionBytesPositions.length;\n    newData = new Uint8Array(newLength);\n    var sourceIndex = 0;\n\n    for (i = 0; i < newLength; sourceIndex++, i++) {\n      if (sourceIndex === emulationPreventionBytesPositions[0]) {\n        // Skip this byte\n        sourceIndex++; // Remove this position index\n\n        emulationPreventionBytesPositions.shift();\n      }\n\n      newData[i] = data[sourceIndex];\n    }\n\n    return newData;\n  }; // exports\n\n\n  var captionPacketParser = {\n    parseSei: parseSei,\n    parseUserData: parseUserData,\n    parseCaptionPackets: parseCaptionPackets,\n    discardEmulationPreventionBytes: discardEmulationPreventionBytes$1,\n    USER_DATA_REGISTERED_ITU_T_T35: USER_DATA_REGISTERED_ITU_T_T35\n  }; // Link To Transport\n  // -----------------\n\n  var CaptionStream$1 = function CaptionStream(options) {\n    options = options || {};\n    CaptionStream.prototype.init.call(this); // parse708captions flag, default to true\n\n    this.parse708captions_ = typeof options.parse708captions === 'boolean' ? options.parse708captions : true;\n    this.captionPackets_ = [];\n    this.ccStreams_ = [new Cea608Stream(0, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(0, 1), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 0), // eslint-disable-line no-use-before-define\n    new Cea608Stream(1, 1) // eslint-disable-line no-use-before-define\n    ];\n\n    if (this.parse708captions_) {\n      this.cc708Stream_ = new Cea708Stream({\n        captionServices: options.captionServices\n      }); // eslint-disable-line no-use-before-define\n    }\n\n    this.reset(); // forward data and done events from CCs to this CaptionStream\n\n    this.ccStreams_.forEach(function (cc) {\n      cc.on('data', this.trigger.bind(this, 'data'));\n      cc.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      cc.on('done', this.trigger.bind(this, 'done'));\n    }, this);\n\n    if (this.parse708captions_) {\n      this.cc708Stream_.on('data', this.trigger.bind(this, 'data'));\n      this.cc708Stream_.on('partialdone', this.trigger.bind(this, 'partialdone'));\n      this.cc708Stream_.on('done', this.trigger.bind(this, 'done'));\n    }\n  };\n\n  CaptionStream$1.prototype = new stream();\n\n  CaptionStream$1.prototype.push = function (event) {\n    var sei, userData, newCaptionPackets; // only examine SEI NALs\n\n    if (event.nalUnitType !== 'sei_rbsp') {\n      return;\n    } // parse the sei\n\n\n    sei = captionPacketParser.parseSei(event.escapedRBSP); // no payload data, skip\n\n    if (!sei.payload) {\n      return;\n    } // ignore everything but user_data_registered_itu_t_t35\n\n\n    if (sei.payloadType !== captionPacketParser.USER_DATA_REGISTERED_ITU_T_T35) {\n      return;\n    } // parse out the user data payload\n\n\n    userData = captionPacketParser.parseUserData(sei); // ignore unrecognized userData\n\n    if (!userData) {\n      return;\n    } // Sometimes, the same segment # will be downloaded twice. To stop the\n    // caption data from being processed twice, we track the latest dts we've\n    // received and ignore everything with a dts before that. However, since\n    // data for a specific dts can be split across packets on either side of\n    // a segment boundary, we need to make sure we *don't* ignore the packets\n    // from the *next* segment that have dts === this.latestDts_. By constantly\n    // tracking the number of packets received with dts === this.latestDts_, we\n    // know how many should be ignored once we start receiving duplicates.\n\n\n    if (event.dts < this.latestDts_) {\n      // We've started getting older data, so set the flag.\n      this.ignoreNextEqualDts_ = true;\n      return;\n    } else if (event.dts === this.latestDts_ && this.ignoreNextEqualDts_) {\n      this.numSameDts_--;\n\n      if (!this.numSameDts_) {\n        // We've received the last duplicate packet, time to start processing again\n        this.ignoreNextEqualDts_ = false;\n      }\n\n      return;\n    } // parse out CC data packets and save them for later\n\n\n    newCaptionPackets = captionPacketParser.parseCaptionPackets(event.pts, userData);\n    this.captionPackets_ = this.captionPackets_.concat(newCaptionPackets);\n\n    if (this.latestDts_ !== event.dts) {\n      this.numSameDts_ = 0;\n    }\n\n    this.numSameDts_++;\n    this.latestDts_ = event.dts;\n  };\n\n  CaptionStream$1.prototype.flushCCStreams = function (flushType) {\n    this.ccStreams_.forEach(function (cc) {\n      return flushType === 'flush' ? cc.flush() : cc.partialFlush();\n    }, this);\n  };\n\n  CaptionStream$1.prototype.flushStream = function (flushType) {\n    // make sure we actually parsed captions before proceeding\n    if (!this.captionPackets_.length) {\n      this.flushCCStreams(flushType);\n      return;\n    } // In Chrome, the Array#sort function is not stable so add a\n    // presortIndex that we can use to ensure we get a stable-sort\n\n\n    this.captionPackets_.forEach(function (elem, idx) {\n      elem.presortIndex = idx;\n    }); // sort caption byte-pairs based on their PTS values\n\n    this.captionPackets_.sort(function (a, b) {\n      if (a.pts === b.pts) {\n        return a.presortIndex - b.presortIndex;\n      }\n\n      return a.pts - b.pts;\n    });\n    this.captionPackets_.forEach(function (packet) {\n      if (packet.type < 2) {\n        // Dispatch packet to the right Cea608Stream\n        this.dispatchCea608Packet(packet);\n      } else {\n        // Dispatch packet to the Cea708Stream\n        this.dispatchCea708Packet(packet);\n      }\n    }, this);\n    this.captionPackets_.length = 0;\n    this.flushCCStreams(flushType);\n  };\n\n  CaptionStream$1.prototype.flush = function () {\n    return this.flushStream('flush');\n  }; // Only called if handling partial data\n\n\n  CaptionStream$1.prototype.partialFlush = function () {\n    return this.flushStream('partialFlush');\n  };\n\n  CaptionStream$1.prototype.reset = function () {\n    this.latestDts_ = null;\n    this.ignoreNextEqualDts_ = false;\n    this.numSameDts_ = 0;\n    this.activeCea608Channel_ = [null, null];\n    this.ccStreams_.forEach(function (ccStream) {\n      ccStream.reset();\n    });\n  }; // From the CEA-608 spec:\n\n  /*\n   * When XDS sub-packets are interleaved with other services, the end of each sub-packet shall be followed\n   * by a control pair to change to a different service. When any of the control codes from 0x10 to 0x1F is\n   * used to begin a control code pair, it indicates the return to captioning or Text data. The control code pair\n   * and subsequent data should then be processed according to the FCC rules. It may be necessary for the\n   * line 21 data encoder to automatically insert a control code pair (i.e. RCL, RU2, RU3, RU4, RDC, or RTD)\n   * to switch to captioning or Text.\n  */\n  // With that in mind, we ignore any data between an XDS control code and a\n  // subsequent closed-captioning control code.\n\n\n  CaptionStream$1.prototype.dispatchCea608Packet = function (packet) {\n    // NOTE: packet.type is the CEA608 field\n    if (this.setsTextOrXDSActive(packet)) {\n      this.activeCea608Channel_[packet.type] = null;\n    } else if (this.setsChannel1Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 0;\n    } else if (this.setsChannel2Active(packet)) {\n      this.activeCea608Channel_[packet.type] = 1;\n    }\n\n    if (this.activeCea608Channel_[packet.type] === null) {\n      // If we haven't received anything to set the active channel, or the\n      // packets are Text/XDS data, discard the data; we don't want jumbled\n      // captions\n      return;\n    }\n\n    this.ccStreams_[(packet.type << 1) + this.activeCea608Channel_[packet.type]].push(packet);\n  };\n\n  CaptionStream$1.prototype.setsChannel1Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1000;\n  };\n\n  CaptionStream$1.prototype.setsChannel2Active = function (packet) {\n    return (packet.ccData & 0x7800) === 0x1800;\n  };\n\n  CaptionStream$1.prototype.setsTextOrXDSActive = function (packet) {\n    return (packet.ccData & 0x7100) === 0x0100 || (packet.ccData & 0x78fe) === 0x102a || (packet.ccData & 0x78fe) === 0x182a;\n  };\n\n  CaptionStream$1.prototype.dispatchCea708Packet = function (packet) {\n    if (this.parse708captions_) {\n      this.cc708Stream_.push(packet);\n    }\n  }; // ----------------------\n  // Session to Application\n  // ----------------------\n  // This hash maps special and extended character codes to their\n  // proper Unicode equivalent. The first one-byte key is just a\n  // non-standard character code. The two-byte keys that follow are\n  // the extended CEA708 character codes, along with the preceding\n  // 0x10 extended character byte to distinguish these codes from\n  // non-extended character codes. Every CEA708 character code that\n  // is not in this object maps directly to a standard unicode\n  // character code.\n  // The transparent space and non-breaking transparent space are\n  // technically not fully supported since there is no code to\n  // make them transparent, so they have normal non-transparent\n  // stand-ins.\n  // The special closed caption (CC) character isn't a standard\n  // unicode character, so a fairly similar unicode character was\n  // chosen in it's place.\n\n\n  var CHARACTER_TRANSLATION_708 = {\n    0x7f: 0x266a,\n    // ♪\n    0x1020: 0x20,\n    // Transparent Space\n    0x1021: 0xa0,\n    // Nob-breaking Transparent Space\n    0x1025: 0x2026,\n    // …\n    0x102a: 0x0160,\n    // Š\n    0x102c: 0x0152,\n    // Œ\n    0x1030: 0x2588,\n    // █\n    0x1031: 0x2018,\n    // ‘\n    0x1032: 0x2019,\n    // ’\n    0x1033: 0x201c,\n    // “\n    0x1034: 0x201d,\n    // ”\n    0x1035: 0x2022,\n    // •\n    0x1039: 0x2122,\n    // ™\n    0x103a: 0x0161,\n    // š\n    0x103c: 0x0153,\n    // œ\n    0x103d: 0x2120,\n    // ℠\n    0x103f: 0x0178,\n    // Ÿ\n    0x1076: 0x215b,\n    // ⅛\n    0x1077: 0x215c,\n    // ⅜\n    0x1078: 0x215d,\n    // ⅝\n    0x1079: 0x215e,\n    // ⅞\n    0x107a: 0x23d0,\n    // ⏐\n    0x107b: 0x23a4,\n    // ⎤\n    0x107c: 0x23a3,\n    // ⎣\n    0x107d: 0x23af,\n    // ⎯\n    0x107e: 0x23a6,\n    // ⎦\n    0x107f: 0x23a1,\n    // ⎡\n    0x10a0: 0x3138 // ㄸ (CC char)\n\n  };\n\n  var get708CharFromCode = function get708CharFromCode(code) {\n    var newCode = CHARACTER_TRANSLATION_708[code] || code;\n\n    if (code & 0x1000 && code === newCode) {\n      // Invalid extended code\n      return '';\n    }\n\n    return String.fromCharCode(newCode);\n  };\n\n  var within708TextBlock = function within708TextBlock(b) {\n    return 0x20 <= b && b <= 0x7f || 0xa0 <= b && b <= 0xff;\n  };\n\n  var Cea708Window = function Cea708Window(windowNum) {\n    this.windowNum = windowNum;\n    this.reset();\n  };\n\n  Cea708Window.prototype.reset = function () {\n    this.clearText();\n    this.pendingNewLine = false;\n    this.winAttr = {};\n    this.penAttr = {};\n    this.penLoc = {};\n    this.penColor = {}; // These default values are arbitrary,\n    // defineWindow will usually override them\n\n    this.visible = 0;\n    this.rowLock = 0;\n    this.columnLock = 0;\n    this.priority = 0;\n    this.relativePositioning = 0;\n    this.anchorVertical = 0;\n    this.anchorHorizontal = 0;\n    this.anchorPoint = 0;\n    this.rowCount = 1;\n    this.virtualRowCount = this.rowCount + 1;\n    this.columnCount = 41;\n    this.windowStyle = 0;\n    this.penStyle = 0;\n  };\n\n  Cea708Window.prototype.getText = function () {\n    return this.rows.join('\\n');\n  };\n\n  Cea708Window.prototype.clearText = function () {\n    this.rows = [''];\n    this.rowIdx = 0;\n  };\n\n  Cea708Window.prototype.newLine = function (pts) {\n    if (this.rows.length >= this.virtualRowCount && typeof this.beforeRowOverflow === 'function') {\n      this.beforeRowOverflow(pts);\n    }\n\n    if (this.rows.length > 0) {\n      this.rows.push('');\n      this.rowIdx++;\n    } // Show all virtual rows since there's no visible scrolling\n\n\n    while (this.rows.length > this.virtualRowCount) {\n      this.rows.shift();\n      this.rowIdx--;\n    }\n  };\n\n  Cea708Window.prototype.isEmpty = function () {\n    if (this.rows.length === 0) {\n      return true;\n    } else if (this.rows.length === 1) {\n      return this.rows[0] === '';\n    }\n\n    return false;\n  };\n\n  Cea708Window.prototype.addText = function (text) {\n    this.rows[this.rowIdx] += text;\n  };\n\n  Cea708Window.prototype.backspace = function () {\n    if (!this.isEmpty()) {\n      var row = this.rows[this.rowIdx];\n      this.rows[this.rowIdx] = row.substr(0, row.length - 1);\n    }\n  };\n\n  var Cea708Service = function Cea708Service(serviceNum, encoding, stream) {\n    this.serviceNum = serviceNum;\n    this.text = '';\n    this.currentWindow = new Cea708Window(-1);\n    this.windows = [];\n    this.stream = stream; // Try to setup a TextDecoder if an `encoding` value was provided\n\n    if (typeof encoding === 'string') {\n      this.createTextDecoder(encoding);\n    }\n  };\n  /**\n   * Initialize service windows\n   * Must be run before service use\n   *\n   * @param  {Integer}  pts               PTS value\n   * @param  {Function} beforeRowOverflow Function to execute before row overflow of a window\n   */\n\n\n  Cea708Service.prototype.init = function (pts, beforeRowOverflow) {\n    this.startPts = pts;\n\n    for (var win = 0; win < 8; win++) {\n      this.windows[win] = new Cea708Window(win);\n\n      if (typeof beforeRowOverflow === 'function') {\n        this.windows[win].beforeRowOverflow = beforeRowOverflow;\n      }\n    }\n  };\n  /**\n   * Set current window of service to be affected by commands\n   *\n   * @param  {Integer} windowNum Window number\n   */\n\n\n  Cea708Service.prototype.setCurrentWindow = function (windowNum) {\n    this.currentWindow = this.windows[windowNum];\n  };\n  /**\n   * Try to create a TextDecoder if it is natively supported\n   */\n\n\n  Cea708Service.prototype.createTextDecoder = function (encoding) {\n    if (typeof TextDecoder === 'undefined') {\n      this.stream.trigger('log', {\n        level: 'warn',\n        message: 'The `encoding` option is unsupported without TextDecoder support'\n      });\n    } else {\n      try {\n        this.textDecoder_ = new TextDecoder(encoding);\n      } catch (error) {\n        this.stream.trigger('log', {\n          level: 'warn',\n          message: 'TextDecoder could not be created with ' + encoding + ' encoding. ' + error\n        });\n      }\n    }\n  };\n\n  var Cea708Stream = function Cea708Stream(options) {\n    options = options || {};\n    Cea708Stream.prototype.init.call(this);\n    var self = this;\n    var captionServices = options.captionServices || {};\n    var captionServiceEncodings = {};\n    var serviceProps; // Get service encodings from captionServices option block\n\n    Object.keys(captionServices).forEach(function (serviceName) {\n      serviceProps = captionServices[serviceName];\n\n      if (/^SERVICE/.test(serviceName)) {\n        captionServiceEncodings[serviceName] = serviceProps.encoding;\n      }\n    });\n    this.serviceEncodings = captionServiceEncodings;\n    this.current708Packet = null;\n    this.services = {};\n\n    this.push = function (packet) {\n      if (packet.type === 3) {\n        // 708 packet start\n        self.new708Packet();\n        self.add708Bytes(packet);\n      } else {\n        if (self.current708Packet === null) {\n          // This should only happen at the start of a file if there's no packet start.\n          self.new708Packet();\n        }\n\n        self.add708Bytes(packet);\n      }\n    };\n  };\n\n  Cea708Stream.prototype = new stream();\n  /**\n   * Push current 708 packet, create new 708 packet.\n   */\n\n  Cea708Stream.prototype.new708Packet = function () {\n    if (this.current708Packet !== null) {\n      this.push708Packet();\n    }\n\n    this.current708Packet = {\n      data: [],\n      ptsVals: []\n    };\n  };\n  /**\n   * Add pts and both bytes from packet into current 708 packet.\n   */\n\n\n  Cea708Stream.prototype.add708Bytes = function (packet) {\n    var data = packet.ccData;\n    var byte0 = data >>> 8;\n    var byte1 = data & 0xff; // I would just keep a list of packets instead of bytes, but it isn't clear in the spec\n    // that service blocks will always line up with byte pairs.\n\n    this.current708Packet.ptsVals.push(packet.pts);\n    this.current708Packet.data.push(byte0);\n    this.current708Packet.data.push(byte1);\n  };\n  /**\n   * Parse completed 708 packet into service blocks and push each service block.\n   */\n\n\n  Cea708Stream.prototype.push708Packet = function () {\n    var packet708 = this.current708Packet;\n    var packetData = packet708.data;\n    var serviceNum = null;\n    var blockSize = null;\n    var i = 0;\n    var b = packetData[i++];\n    packet708.seq = b >> 6;\n    packet708.sizeCode = b & 0x3f; // 0b00111111;\n\n    for (; i < packetData.length; i++) {\n      b = packetData[i++];\n      serviceNum = b >> 5;\n      blockSize = b & 0x1f; // 0b00011111\n\n      if (serviceNum === 7 && blockSize > 0) {\n        // Extended service num\n        b = packetData[i++];\n        serviceNum = b;\n      }\n\n      this.pushServiceBlock(serviceNum, i, blockSize);\n\n      if (blockSize > 0) {\n        i += blockSize - 1;\n      }\n    }\n  };\n  /**\n   * Parse service block, execute commands, read text.\n   *\n   * Note: While many of these commands serve important purposes,\n   * many others just parse out the parameters or attributes, but\n   * nothing is done with them because this is not a full and complete\n   * implementation of the entire 708 spec.\n   *\n   * @param  {Integer} serviceNum Service number\n   * @param  {Integer} start      Start index of the 708 packet data\n   * @param  {Integer} size       Block size\n   */\n\n\n  Cea708Stream.prototype.pushServiceBlock = function (serviceNum, start, size) {\n    var b;\n    var i = start;\n    var packetData = this.current708Packet.data;\n    var service = this.services[serviceNum];\n\n    if (!service) {\n      service = this.initService(serviceNum, i);\n    }\n\n    for (; i < start + size && i < packetData.length; i++) {\n      b = packetData[i];\n\n      if (within708TextBlock(b)) {\n        i = this.handleText(i, service);\n      } else if (b === 0x18) {\n        i = this.multiByteCharacter(i, service);\n      } else if (b === 0x10) {\n        i = this.extendedCommands(i, service);\n      } else if (0x80 <= b && b <= 0x87) {\n        i = this.setCurrentWindow(i, service);\n      } else if (0x98 <= b && b <= 0x9f) {\n        i = this.defineWindow(i, service);\n      } else if (b === 0x88) {\n        i = this.clearWindows(i, service);\n      } else if (b === 0x8c) {\n        i = this.deleteWindows(i, service);\n      } else if (b === 0x89) {\n        i = this.displayWindows(i, service);\n      } else if (b === 0x8a) {\n        i = this.hideWindows(i, service);\n      } else if (b === 0x8b) {\n        i = this.toggleWindows(i, service);\n      } else if (b === 0x97) {\n        i = this.setWindowAttributes(i, service);\n      } else if (b === 0x90) {\n        i = this.setPenAttributes(i, service);\n      } else if (b === 0x91) {\n        i = this.setPenColor(i, service);\n      } else if (b === 0x92) {\n        i = this.setPenLocation(i, service);\n      } else if (b === 0x8f) {\n        service = this.reset(i, service);\n      } else if (b === 0x08) {\n        // BS: Backspace\n        service.currentWindow.backspace();\n      } else if (b === 0x0c) {\n        // FF: Form feed\n        service.currentWindow.clearText();\n      } else if (b === 0x0d) {\n        // CR: Carriage return\n        service.currentWindow.pendingNewLine = true;\n      } else if (b === 0x0e) {\n        // HCR: Horizontal carriage return\n        service.currentWindow.clearText();\n      } else if (b === 0x8d) {\n        // DLY: Delay, nothing to do\n        i++;\n      } else ;\n    }\n  };\n  /**\n   * Execute an extended command\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.extendedCommands = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n\n    if (within708TextBlock(b)) {\n      i = this.handleText(i, service, {\n        isExtended: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Get PTS value of a given byte index\n   *\n   * @param  {Integer} byteIndex  Index of the byte\n   * @return {Integer}            PTS\n   */\n\n\n  Cea708Stream.prototype.getPts = function (byteIndex) {\n    // There's 1 pts value per 2 bytes\n    return this.current708Packet.ptsVals[Math.floor(byteIndex / 2)];\n  };\n  /**\n   * Initializes a service\n   *\n   * @param  {Integer} serviceNum Service number\n   * @return {Service}            Initialized service object\n   */\n\n\n  Cea708Stream.prototype.initService = function (serviceNum, i) {\n    var serviceName = 'SERVICE' + serviceNum;\n    var self = this;\n    var serviceName;\n    var encoding;\n\n    if (serviceName in this.serviceEncodings) {\n      encoding = this.serviceEncodings[serviceName];\n    }\n\n    this.services[serviceNum] = new Cea708Service(serviceNum, encoding, self);\n    this.services[serviceNum].init(this.getPts(i), function (pts) {\n      self.flushDisplayed(pts, self.services[serviceNum]);\n    });\n    return this.services[serviceNum];\n  };\n  /**\n   * Execute text writing to current window\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.handleText = function (i, service, options) {\n    var isExtended = options && options.isExtended;\n    var isMultiByte = options && options.isMultiByte;\n    var packetData = this.current708Packet.data;\n    var extended = isExtended ? 0x1000 : 0x0000;\n    var currentByte = packetData[i];\n    var nextByte = packetData[i + 1];\n    var win = service.currentWindow;\n\n    var _char;\n\n    var charCodeArray; // Use the TextDecoder if one was created for this service\n\n    if (service.textDecoder_ && !isExtended) {\n      if (isMultiByte) {\n        charCodeArray = [currentByte, nextByte];\n        i++;\n      } else {\n        charCodeArray = [currentByte];\n      }\n\n      _char = service.textDecoder_.decode(new Uint8Array(charCodeArray));\n    } else {\n      _char = get708CharFromCode(extended | currentByte);\n    }\n\n    if (win.pendingNewLine && !win.isEmpty()) {\n      win.newLine(this.getPts(i));\n    }\n\n    win.pendingNewLine = false;\n    win.addText(_char);\n    return i;\n  };\n  /**\n   * Handle decoding of multibyte character\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.multiByteCharacter = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var firstByte = packetData[i + 1];\n    var secondByte = packetData[i + 2];\n\n    if (within708TextBlock(firstByte) && within708TextBlock(secondByte)) {\n      i = this.handleText(++i, service, {\n        isMultiByte: true\n      });\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CW# command.\n   *\n   * Set the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setCurrentWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    return i;\n  };\n  /**\n   * Parse and execute the DF# command.\n   *\n   * Define a window and set it as the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.defineWindow = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var windowNum = b & 0x07;\n    service.setCurrentWindow(windowNum);\n    var win = service.currentWindow;\n    b = packetData[++i];\n    win.visible = (b & 0x20) >> 5; // v\n\n    win.rowLock = (b & 0x10) >> 4; // rl\n\n    win.columnLock = (b & 0x08) >> 3; // cl\n\n    win.priority = b & 0x07; // p\n\n    b = packetData[++i];\n    win.relativePositioning = (b & 0x80) >> 7; // rp\n\n    win.anchorVertical = b & 0x7f; // av\n\n    b = packetData[++i];\n    win.anchorHorizontal = b; // ah\n\n    b = packetData[++i];\n    win.anchorPoint = (b & 0xf0) >> 4; // ap\n\n    win.rowCount = b & 0x0f; // rc\n\n    b = packetData[++i];\n    win.columnCount = b & 0x3f; // cc\n\n    b = packetData[++i];\n    win.windowStyle = (b & 0x38) >> 3; // ws\n\n    win.penStyle = b & 0x07; // ps\n    // The spec says there are (rowCount+1) \"virtual rows\"\n\n    win.virtualRowCount = win.rowCount + 1;\n    return i;\n  };\n  /**\n   * Parse and execute the SWA command.\n   *\n   * Set attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setWindowAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var winAttr = service.currentWindow.winAttr;\n    b = packetData[++i];\n    winAttr.fillOpacity = (b & 0xc0) >> 6; // fo\n\n    winAttr.fillRed = (b & 0x30) >> 4; // fr\n\n    winAttr.fillGreen = (b & 0x0c) >> 2; // fg\n\n    winAttr.fillBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    winAttr.borderType = (b & 0xc0) >> 6; // bt\n\n    winAttr.borderRed = (b & 0x30) >> 4; // br\n\n    winAttr.borderGreen = (b & 0x0c) >> 2; // bg\n\n    winAttr.borderBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    winAttr.borderType += (b & 0x80) >> 5; // bt\n\n    winAttr.wordWrap = (b & 0x40) >> 6; // ww\n\n    winAttr.printDirection = (b & 0x30) >> 4; // pd\n\n    winAttr.scrollDirection = (b & 0x0c) >> 2; // sd\n\n    winAttr.justify = b & 0x03; // j\n\n    b = packetData[++i];\n    winAttr.effectSpeed = (b & 0xf0) >> 4; // es\n\n    winAttr.effectDirection = (b & 0x0c) >> 2; // ed\n\n    winAttr.displayEffect = b & 0x03; // de\n\n    return i;\n  };\n  /**\n   * Gather text from all displayed windows and push a caption to output.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.flushDisplayed = function (pts, service) {\n    var displayedText = []; // TODO: Positioning not supported, displaying multiple windows will not necessarily\n    // display text in the correct order, but sample files so far have not shown any issue.\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (service.windows[winId].visible && !service.windows[winId].isEmpty()) {\n        displayedText.push(service.windows[winId].getText());\n      }\n    }\n\n    service.endPts = pts;\n    service.text = displayedText.join('\\n\\n');\n    this.pushCaption(service);\n    service.startPts = pts;\n  };\n  /**\n   * Push a caption to output if the caption contains text.\n   *\n   * @param  {Service} service  The service object to be affected\n   */\n\n\n  Cea708Stream.prototype.pushCaption = function (service) {\n    if (service.text !== '') {\n      this.trigger('data', {\n        startPts: service.startPts,\n        endPts: service.endPts,\n        text: service.text,\n        stream: 'cc708_' + service.serviceNum\n      });\n      service.text = '';\n      service.startPts = service.endPts;\n    }\n  };\n  /**\n   * Parse and execute the DSW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.displayWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the HDW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.hideWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible = 0;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the TGW command.\n   *\n   * Set visible property of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.toggleWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].visible ^= 1;\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the CLW command.\n   *\n   * Clear text of windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.clearWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].clearText();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the DLW command.\n   *\n   * Re-initialize windows based on the parsed bitmask.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.deleteWindows = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[++i];\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n\n    for (var winId = 0; winId < 8; winId++) {\n      if (b & 0x01 << winId) {\n        service.windows[winId].reset();\n      }\n    }\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPA command.\n   *\n   * Set pen attributes of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenAttributes = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penAttr = service.currentWindow.penAttr;\n    b = packetData[++i];\n    penAttr.textTag = (b & 0xf0) >> 4; // tt\n\n    penAttr.offset = (b & 0x0c) >> 2; // o\n\n    penAttr.penSize = b & 0x03; // s\n\n    b = packetData[++i];\n    penAttr.italics = (b & 0x80) >> 7; // i\n\n    penAttr.underline = (b & 0x40) >> 6; // u\n\n    penAttr.edgeType = (b & 0x38) >> 3; // et\n\n    penAttr.fontStyle = b & 0x07; // fs\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPC command.\n   *\n   * Set pen color of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenColor = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penColor = service.currentWindow.penColor;\n    b = packetData[++i];\n    penColor.fgOpacity = (b & 0xc0) >> 6; // fo\n\n    penColor.fgRed = (b & 0x30) >> 4; // fr\n\n    penColor.fgGreen = (b & 0x0c) >> 2; // fg\n\n    penColor.fgBlue = b & 0x03; // fb\n\n    b = packetData[++i];\n    penColor.bgOpacity = (b & 0xc0) >> 6; // bo\n\n    penColor.bgRed = (b & 0x30) >> 4; // br\n\n    penColor.bgGreen = (b & 0x0c) >> 2; // bg\n\n    penColor.bgBlue = b & 0x03; // bb\n\n    b = packetData[++i];\n    penColor.edgeRed = (b & 0x30) >> 4; // er\n\n    penColor.edgeGreen = (b & 0x0c) >> 2; // eg\n\n    penColor.edgeBlue = b & 0x03; // eb\n\n    return i;\n  };\n  /**\n   * Parse and execute the SPL command.\n   *\n   * Set pen location of the current window.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Integer}          New index after parsing\n   */\n\n\n  Cea708Stream.prototype.setPenLocation = function (i, service) {\n    var packetData = this.current708Packet.data;\n    var b = packetData[i];\n    var penLoc = service.currentWindow.penLoc; // Positioning isn't really supported at the moment, so this essentially just inserts a linebreak\n\n    service.currentWindow.pendingNewLine = true;\n    b = packetData[++i];\n    penLoc.row = b & 0x0f; // r\n\n    b = packetData[++i];\n    penLoc.column = b & 0x3f; // c\n\n    return i;\n  };\n  /**\n   * Execute the RST command.\n   *\n   * Reset service to a clean slate. Re-initialize.\n   *\n   * @param  {Integer} i        Current index in the 708 packet\n   * @param  {Service} service  The service object to be affected\n   * @return {Service}          Re-initialized service\n   */\n\n\n  Cea708Stream.prototype.reset = function (i, service) {\n    var pts = this.getPts(i);\n    this.flushDisplayed(pts, service);\n    return this.initService(service.serviceNum, i);\n  }; // This hash maps non-ASCII, special, and extended character codes to their\n  // proper Unicode equivalent. The first keys that are only a single byte\n  // are the non-standard ASCII characters, which simply map the CEA608 byte\n  // to the standard ASCII/Unicode. The two-byte keys that follow are the CEA608\n  // character codes, but have their MSB bitmasked with 0x03 so that a lookup\n  // can be performed regardless of the field and data channel on which the\n  // character code was received.\n\n\n  var CHARACTER_TRANSLATION = {\n    0x2a: 0xe1,\n    // á\n    0x5c: 0xe9,\n    // é\n    0x5e: 0xed,\n    // í\n    0x5f: 0xf3,\n    // ó\n    0x60: 0xfa,\n    // ú\n    0x7b: 0xe7,\n    // ç\n    0x7c: 0xf7,\n    // ÷\n    0x7d: 0xd1,\n    // Ñ\n    0x7e: 0xf1,\n    // ñ\n    0x7f: 0x2588,\n    // █\n    0x0130: 0xae,\n    // ®\n    0x0131: 0xb0,\n    // °\n    0x0132: 0xbd,\n    // ½\n    0x0133: 0xbf,\n    // ¿\n    0x0134: 0x2122,\n    // ™\n    0x0135: 0xa2,\n    // ¢\n    0x0136: 0xa3,\n    // £\n    0x0137: 0x266a,\n    // ♪\n    0x0138: 0xe0,\n    // à\n    0x0139: 0xa0,\n    //\n    0x013a: 0xe8,\n    // è\n    0x013b: 0xe2,\n    // â\n    0x013c: 0xea,\n    // ê\n    0x013d: 0xee,\n    // î\n    0x013e: 0xf4,\n    // ô\n    0x013f: 0xfb,\n    // û\n    0x0220: 0xc1,\n    // Á\n    0x0221: 0xc9,\n    // É\n    0x0222: 0xd3,\n    // Ó\n    0x0223: 0xda,\n    // Ú\n    0x0224: 0xdc,\n    // Ü\n    0x0225: 0xfc,\n    // ü\n    0x0226: 0x2018,\n    // ‘\n    0x0227: 0xa1,\n    // ¡\n    0x0228: 0x2a,\n    // *\n    0x0229: 0x27,\n    // '\n    0x022a: 0x2014,\n    // —\n    0x022b: 0xa9,\n    // ©\n    0x022c: 0x2120,\n    // ℠\n    0x022d: 0x2022,\n    // •\n    0x022e: 0x201c,\n    // “\n    0x022f: 0x201d,\n    // ”\n    0x0230: 0xc0,\n    // À\n    0x0231: 0xc2,\n    // Â\n    0x0232: 0xc7,\n    // Ç\n    0x0233: 0xc8,\n    // È\n    0x0234: 0xca,\n    // Ê\n    0x0235: 0xcb,\n    // Ë\n    0x0236: 0xeb,\n    // ë\n    0x0237: 0xce,\n    // Î\n    0x0238: 0xcf,\n    // Ï\n    0x0239: 0xef,\n    // ï\n    0x023a: 0xd4,\n    // Ô\n    0x023b: 0xd9,\n    // Ù\n    0x023c: 0xf9,\n    // ù\n    0x023d: 0xdb,\n    // Û\n    0x023e: 0xab,\n    // «\n    0x023f: 0xbb,\n    // »\n    0x0320: 0xc3,\n    // Ã\n    0x0321: 0xe3,\n    // ã\n    0x0322: 0xcd,\n    // Í\n    0x0323: 0xcc,\n    // Ì\n    0x0324: 0xec,\n    // ì\n    0x0325: 0xd2,\n    // Ò\n    0x0326: 0xf2,\n    // ò\n    0x0327: 0xd5,\n    // Õ\n    0x0328: 0xf5,\n    // õ\n    0x0329: 0x7b,\n    // {\n    0x032a: 0x7d,\n    // }\n    0x032b: 0x5c,\n    // \\\n    0x032c: 0x5e,\n    // ^\n    0x032d: 0x5f,\n    // _\n    0x032e: 0x7c,\n    // |\n    0x032f: 0x7e,\n    // ~\n    0x0330: 0xc4,\n    // Ä\n    0x0331: 0xe4,\n    // ä\n    0x0332: 0xd6,\n    // Ö\n    0x0333: 0xf6,\n    // ö\n    0x0334: 0xdf,\n    // ß\n    0x0335: 0xa5,\n    // ¥\n    0x0336: 0xa4,\n    // ¤\n    0x0337: 0x2502,\n    // │\n    0x0338: 0xc5,\n    // Å\n    0x0339: 0xe5,\n    // å\n    0x033a: 0xd8,\n    // Ø\n    0x033b: 0xf8,\n    // ø\n    0x033c: 0x250c,\n    // ┌\n    0x033d: 0x2510,\n    // ┐\n    0x033e: 0x2514,\n    // └\n    0x033f: 0x2518 // ┘\n\n  };\n\n  var getCharFromCode = function getCharFromCode(code) {\n    if (code === null) {\n      return '';\n    }\n\n    code = CHARACTER_TRANSLATION[code] || code;\n    return String.fromCharCode(code);\n  }; // the index of the last row in a CEA-608 display buffer\n\n\n  var BOTTOM_ROW = 14; // This array is used for mapping PACs -> row #, since there's no way of\n  // getting it through bit logic.\n\n  var ROWS = [0x1100, 0x1120, 0x1200, 0x1220, 0x1500, 0x1520, 0x1600, 0x1620, 0x1700, 0x1720, 0x1000, 0x1300, 0x1320, 0x1400, 0x1420]; // CEA-608 captions are rendered onto a 34x15 matrix of character\n  // cells. The \"bottom\" row is the last element in the outer array.\n\n  var createDisplayBuffer = function createDisplayBuffer() {\n    var result = [],\n        i = BOTTOM_ROW + 1;\n\n    while (i--) {\n      result.push('');\n    }\n\n    return result;\n  };\n\n  var Cea608Stream = function Cea608Stream(field, dataChannel) {\n    Cea608Stream.prototype.init.call(this);\n    this.field_ = field || 0;\n    this.dataChannel_ = dataChannel || 0;\n    this.name_ = 'CC' + ((this.field_ << 1 | this.dataChannel_) + 1);\n    this.setConstants();\n    this.reset();\n\n    this.push = function (packet) {\n      var data, swap, char0, char1, text; // remove the parity bits\n\n      data = packet.ccData & 0x7f7f; // ignore duplicate control codes; the spec demands they're sent twice\n\n      if (data === this.lastControlCode_) {\n        this.lastControlCode_ = null;\n        return;\n      } // Store control codes\n\n\n      if ((data & 0xf000) === 0x1000) {\n        this.lastControlCode_ = data;\n      } else if (data !== this.PADDING_) {\n        this.lastControlCode_ = null;\n      }\n\n      char0 = data >>> 8;\n      char1 = data & 0xff;\n\n      if (data === this.PADDING_) {\n        return;\n      } else if (data === this.RESUME_CAPTION_LOADING_) {\n        this.mode_ = 'popOn';\n      } else if (data === this.END_OF_CAPTION_) {\n        // If an EOC is received while in paint-on mode, the displayed caption\n        // text should be swapped to non-displayed memory as if it was a pop-on\n        // caption. Because of that, we should explicitly switch back to pop-on\n        // mode\n        this.mode_ = 'popOn';\n        this.clearFormatting(packet.pts); // if a caption was being displayed, it's gone now\n\n        this.flushDisplayed(packet.pts); // flip memory\n\n        swap = this.displayed_;\n        this.displayed_ = this.nonDisplayed_;\n        this.nonDisplayed_ = swap; // start measuring the time to display the caption\n\n        this.startPts_ = packet.pts;\n      } else if (data === this.ROLL_UP_2_ROWS_) {\n        this.rollUpRows_ = 2;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_3_ROWS_) {\n        this.rollUpRows_ = 3;\n        this.setRollUp(packet.pts);\n      } else if (data === this.ROLL_UP_4_ROWS_) {\n        this.rollUpRows_ = 4;\n        this.setRollUp(packet.pts);\n      } else if (data === this.CARRIAGE_RETURN_) {\n        this.clearFormatting(packet.pts);\n        this.flushDisplayed(packet.pts);\n        this.shiftRowsUp_();\n        this.startPts_ = packet.pts;\n      } else if (data === this.BACKSPACE_) {\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        }\n      } else if (data === this.ERASE_DISPLAYED_MEMORY_) {\n        this.flushDisplayed(packet.pts);\n        this.displayed_ = createDisplayBuffer();\n      } else if (data === this.ERASE_NON_DISPLAYED_MEMORY_) {\n        this.nonDisplayed_ = createDisplayBuffer();\n      } else if (data === this.RESUME_DIRECT_CAPTIONING_) {\n        if (this.mode_ !== 'paintOn') {\n          // NOTE: This should be removed when proper caption positioning is\n          // implemented\n          this.flushDisplayed(packet.pts);\n          this.displayed_ = createDisplayBuffer();\n        }\n\n        this.mode_ = 'paintOn';\n        this.startPts_ = packet.pts; // Append special characters to caption text\n      } else if (this.isSpecialCharacter(char0, char1)) {\n        // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Append extended characters to caption text\n      } else if (this.isExtCharacter(char0, char1)) {\n        // Extended characters always follow their \"non-extended\" equivalents.\n        // IE if a \"è\" is desired, you'll always receive \"eè\"; non-compliant\n        // decoders are supposed to drop the \"è\", while compliant decoders\n        // backspace the \"e\" and insert \"è\".\n        // Delete the previous character\n        if (this.mode_ === 'popOn') {\n          this.nonDisplayed_[this.row_] = this.nonDisplayed_[this.row_].slice(0, -1);\n        } else {\n          this.displayed_[this.row_] = this.displayed_[this.row_].slice(0, -1);\n        } // Bitmask char0 so that we can apply character transformations\n        // regardless of field and data channel.\n        // Then byte-shift to the left and OR with char1 so we can pass the\n        // entire character code to `getCharFromCode`.\n\n\n        char0 = (char0 & 0x03) << 8;\n        text = getCharFromCode(char0 | char1);\n        this[this.mode_](packet.pts, text);\n        this.column_++; // Process mid-row codes\n      } else if (this.isMidRowCode(char0, char1)) {\n        // Attributes are not additive, so clear all formatting\n        this.clearFormatting(packet.pts); // According to the standard, mid-row codes\n        // should be replaced with spaces, so add one now\n\n        this[this.mode_](packet.pts, ' ');\n        this.column_++;\n\n        if ((char1 & 0xe) === 0xe) {\n          this.addFormatting(packet.pts, ['i']);\n        }\n\n        if ((char1 & 0x1) === 0x1) {\n          this.addFormatting(packet.pts, ['u']);\n        } // Detect offset control codes and adjust cursor\n\n      } else if (this.isOffsetControlCode(char0, char1)) {\n        // Cursor position is set by indent PAC (see below) in 4-column\n        // increments, with an additional offset code of 1-3 to reach any\n        // of the 32 columns specified by CEA-608. So all we need to do\n        // here is increment the column cursor by the given offset.\n        this.column_ += char1 & 0x03; // Detect PACs (Preamble Address Codes)\n      } else if (this.isPAC(char0, char1)) {\n        // There's no logic for PAC -> row mapping, so we have to just\n        // find the row code in an array and use its index :(\n        var row = ROWS.indexOf(data & 0x1f20); // Configure the caption window if we're in roll-up mode\n\n        if (this.mode_ === 'rollUp') {\n          // This implies that the base row is incorrectly set.\n          // As per the recommendation in CEA-608(Base Row Implementation), defer to the number\n          // of roll-up rows set.\n          if (row - this.rollUpRows_ + 1 < 0) {\n            row = this.rollUpRows_ - 1;\n          }\n\n          this.setRollUp(packet.pts, row);\n        }\n\n        if (row !== this.row_) {\n          // formatting is only persistent for current row\n          this.clearFormatting(packet.pts);\n          this.row_ = row;\n        } // All PACs can apply underline, so detect and apply\n        // (All odd-numbered second bytes set underline)\n\n\n        if (char1 & 0x1 && this.formatting_.indexOf('u') === -1) {\n          this.addFormatting(packet.pts, ['u']);\n        }\n\n        if ((data & 0x10) === 0x10) {\n          // We've got an indent level code. Each successive even number\n          // increments the column cursor by 4, so we can get the desired\n          // column position by bit-shifting to the right (to get n/2)\n          // and multiplying by 4.\n          this.column_ = ((data & 0xe) >> 1) * 4;\n        }\n\n        if (this.isColorPAC(char1)) {\n          // it's a color code, though we only support white, which\n          // can be either normal or italicized. white italics can be\n          // either 0x4e or 0x6e depending on the row, so we just\n          // bitwise-and with 0xe to see if italics should be turned on\n          if ((char1 & 0xe) === 0xe) {\n            this.addFormatting(packet.pts, ['i']);\n          }\n        } // We have a normal character in char0, and possibly one in char1\n\n      } else if (this.isNormalChar(char0)) {\n        if (char1 === 0x00) {\n          char1 = null;\n        }\n\n        text = getCharFromCode(char0);\n        text += getCharFromCode(char1);\n        this[this.mode_](packet.pts, text);\n        this.column_ += text.length;\n      } // finish data processing\n\n    };\n  };\n\n  Cea608Stream.prototype = new stream(); // Trigger a cue point that captures the current state of the\n  // display buffer\n\n  Cea608Stream.prototype.flushDisplayed = function (pts) {\n    var content = this.displayed_ // remove spaces from the start and end of the string\n    .map(function (row, index) {\n      try {\n        return row.trim();\n      } catch (e) {\n        // Ordinarily, this shouldn't happen. However, caption\n        // parsing errors should not throw exceptions and\n        // break playback.\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping a malformed 608 caption at index ' + index + '.'\n        });\n        return '';\n      }\n    }, this) // combine all text rows to display in one cue\n    .join('\\n') // and remove blank rows from the start and end, but not the middle\n    .replace(/^\\n+|\\n+$/g, '');\n\n    if (content.length) {\n      this.trigger('data', {\n        startPts: this.startPts_,\n        endPts: pts,\n        text: content,\n        stream: this.name_\n      });\n    }\n  };\n  /**\n   * Zero out the data, used for startup and on seek\n   */\n\n\n  Cea608Stream.prototype.reset = function () {\n    this.mode_ = 'popOn'; // When in roll-up mode, the index of the last row that will\n    // actually display captions. If a caption is shifted to a row\n    // with a lower index than this, it is cleared from the display\n    // buffer\n\n    this.topRow_ = 0;\n    this.startPts_ = 0;\n    this.displayed_ = createDisplayBuffer();\n    this.nonDisplayed_ = createDisplayBuffer();\n    this.lastControlCode_ = null; // Track row and column for proper line-breaking and spacing\n\n    this.column_ = 0;\n    this.row_ = BOTTOM_ROW;\n    this.rollUpRows_ = 2; // This variable holds currently-applied formatting\n\n    this.formatting_ = [];\n  };\n  /**\n   * Sets up control code and related constants for this instance\n   */\n\n\n  Cea608Stream.prototype.setConstants = function () {\n    // The following attributes have these uses:\n    // ext_ :    char0 for mid-row codes, and the base for extended\n    //           chars (ext_+0, ext_+1, and ext_+2 are char0s for\n    //           extended codes)\n    // control_: char0 for control codes, except byte-shifted to the\n    //           left so that we can do this.control_ | CONTROL_CODE\n    // offset_:  char0 for tab offset codes\n    //\n    // It's also worth noting that control codes, and _only_ control codes,\n    // differ between field 1 and field2. Field 2 control codes are always\n    // their field 1 value plus 1. That's why there's the \"| field\" on the\n    // control value.\n    if (this.dataChannel_ === 0) {\n      this.BASE_ = 0x10;\n      this.EXT_ = 0x11;\n      this.CONTROL_ = (0x14 | this.field_) << 8;\n      this.OFFSET_ = 0x17;\n    } else if (this.dataChannel_ === 1) {\n      this.BASE_ = 0x18;\n      this.EXT_ = 0x19;\n      this.CONTROL_ = (0x1c | this.field_) << 8;\n      this.OFFSET_ = 0x1f;\n    } // Constants for the LSByte command codes recognized by Cea608Stream. This\n    // list is not exhaustive. For a more comprehensive listing and semantics see\n    // http://www.gpo.gov/fdsys/pkg/CFR-2010-title47-vol1/pdf/CFR-2010-title47-vol1-sec15-119.pdf\n    // Padding\n\n\n    this.PADDING_ = 0x0000; // Pop-on Mode\n\n    this.RESUME_CAPTION_LOADING_ = this.CONTROL_ | 0x20;\n    this.END_OF_CAPTION_ = this.CONTROL_ | 0x2f; // Roll-up Mode\n\n    this.ROLL_UP_2_ROWS_ = this.CONTROL_ | 0x25;\n    this.ROLL_UP_3_ROWS_ = this.CONTROL_ | 0x26;\n    this.ROLL_UP_4_ROWS_ = this.CONTROL_ | 0x27;\n    this.CARRIAGE_RETURN_ = this.CONTROL_ | 0x2d; // paint-on mode\n\n    this.RESUME_DIRECT_CAPTIONING_ = this.CONTROL_ | 0x29; // Erasure\n\n    this.BACKSPACE_ = this.CONTROL_ | 0x21;\n    this.ERASE_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2c;\n    this.ERASE_NON_DISPLAYED_MEMORY_ = this.CONTROL_ | 0x2e;\n  };\n  /**\n   * Detects if the 2-byte packet data is a special character\n   *\n   * Special characters have a second byte in the range 0x30 to 0x3f,\n   * with the first byte being 0x11 (for data channel 1) or 0x19 (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an special character\n   */\n\n\n  Cea608Stream.prototype.isSpecialCharacter = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x30 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet data is an extended character\n   *\n   * Extended characters have a second byte in the range 0x20 to 0x3f,\n   * with the first byte being 0x12 or 0x13 (for data channel 1) or\n   * 0x1a or 0x1b (for data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an extended character\n   */\n\n\n  Cea608Stream.prototype.isExtCharacter = function (char0, char1) {\n    return (char0 === this.EXT_ + 1 || char0 === this.EXT_ + 2) && char1 >= 0x20 && char1 <= 0x3f;\n  };\n  /**\n   * Detects if the 2-byte packet is a mid-row code\n   *\n   * Mid-row codes have a second byte in the range 0x20 to 0x2f, with\n   * the first byte being 0x11 (for data channel 1) or 0x19 (for data\n   * channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a mid-row code\n   */\n\n\n  Cea608Stream.prototype.isMidRowCode = function (char0, char1) {\n    return char0 === this.EXT_ && char1 >= 0x20 && char1 <= 0x2f;\n  };\n  /**\n   * Detects if the 2-byte packet is an offset control code\n   *\n   * Offset control codes have a second byte in the range 0x21 to 0x23,\n   * with the first byte being 0x17 (for data channel 1) or 0x1f (for\n   * data channel 2).\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are an offset control code\n   */\n\n\n  Cea608Stream.prototype.isOffsetControlCode = function (char0, char1) {\n    return char0 === this.OFFSET_ && char1 >= 0x21 && char1 <= 0x23;\n  };\n  /**\n   * Detects if the 2-byte packet is a Preamble Address Code\n   *\n   * PACs have a first byte in the range 0x10 to 0x17 (for data channel 1)\n   * or 0x18 to 0x1f (for data channel 2), with the second byte in the\n   * range 0x40 to 0x7f.\n   *\n   * @param  {Integer} char0 The first byte\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the 2 bytes are a PAC\n   */\n\n\n  Cea608Stream.prototype.isPAC = function (char0, char1) {\n    return char0 >= this.BASE_ && char0 < this.BASE_ + 8 && char1 >= 0x40 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a packet's second byte is in the range of a PAC color code\n   *\n   * PAC color codes have the second byte be in the range 0x40 to 0x4f, or\n   * 0x60 to 0x6f.\n   *\n   * @param  {Integer} char1 The second byte\n   * @return {Boolean}       Whether the byte is a color PAC\n   */\n\n\n  Cea608Stream.prototype.isColorPAC = function (char1) {\n    return char1 >= 0x40 && char1 <= 0x4f || char1 >= 0x60 && char1 <= 0x7f;\n  };\n  /**\n   * Detects if a single byte is in the range of a normal character\n   *\n   * Normal text bytes are in the range 0x20 to 0x7f.\n   *\n   * @param  {Integer} char  The byte\n   * @return {Boolean}       Whether the byte is a normal character\n   */\n\n\n  Cea608Stream.prototype.isNormalChar = function (_char2) {\n    return _char2 >= 0x20 && _char2 <= 0x7f;\n  };\n  /**\n   * Configures roll-up\n   *\n   * @param  {Integer} pts         Current PTS\n   * @param  {Integer} newBaseRow  Used by PACs to slide the current window to\n   *                               a new position\n   */\n\n\n  Cea608Stream.prototype.setRollUp = function (pts, newBaseRow) {\n    // Reset the base row to the bottom row when switching modes\n    if (this.mode_ !== 'rollUp') {\n      this.row_ = BOTTOM_ROW;\n      this.mode_ = 'rollUp'; // Spec says to wipe memories when switching to roll-up\n\n      this.flushDisplayed(pts);\n      this.nonDisplayed_ = createDisplayBuffer();\n      this.displayed_ = createDisplayBuffer();\n    }\n\n    if (newBaseRow !== undefined && newBaseRow !== this.row_) {\n      // move currently displayed captions (up or down) to the new base row\n      for (var i = 0; i < this.rollUpRows_; i++) {\n        this.displayed_[newBaseRow - i] = this.displayed_[this.row_ - i];\n        this.displayed_[this.row_ - i] = '';\n      }\n    }\n\n    if (newBaseRow === undefined) {\n      newBaseRow = this.row_;\n    }\n\n    this.topRow_ = newBaseRow - this.rollUpRows_ + 1;\n  }; // Adds the opening HTML tag for the passed character to the caption text,\n  // and keeps track of it for later closing\n\n\n  Cea608Stream.prototype.addFormatting = function (pts, format) {\n    this.formatting_ = this.formatting_.concat(format);\n    var text = format.reduce(function (text, format) {\n      return text + '<' + format + '>';\n    }, '');\n    this[this.mode_](pts, text);\n  }; // Adds HTML closing tags for current formatting to caption text and\n  // clears remembered formatting\n\n\n  Cea608Stream.prototype.clearFormatting = function (pts) {\n    if (!this.formatting_.length) {\n      return;\n    }\n\n    var text = this.formatting_.reverse().reduce(function (text, format) {\n      return text + '</' + format + '>';\n    }, '');\n    this.formatting_ = [];\n    this[this.mode_](pts, text);\n  }; // Mode Implementations\n\n\n  Cea608Stream.prototype.popOn = function (pts, text) {\n    var baseRow = this.nonDisplayed_[this.row_]; // buffer characters\n\n    baseRow += text;\n    this.nonDisplayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.rollUp = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  };\n\n  Cea608Stream.prototype.shiftRowsUp_ = function () {\n    var i; // clear out inactive rows\n\n    for (i = 0; i < this.topRow_; i++) {\n      this.displayed_[i] = '';\n    }\n\n    for (i = this.row_ + 1; i < BOTTOM_ROW + 1; i++) {\n      this.displayed_[i] = '';\n    } // shift displayed rows up\n\n\n    for (i = this.topRow_; i < this.row_; i++) {\n      this.displayed_[i] = this.displayed_[i + 1];\n    } // clear out the bottom row\n\n\n    this.displayed_[this.row_] = '';\n  };\n\n  Cea608Stream.prototype.paintOn = function (pts, text) {\n    var baseRow = this.displayed_[this.row_];\n    baseRow += text;\n    this.displayed_[this.row_] = baseRow;\n  }; // exports\n\n\n  var captionStream = {\n    CaptionStream: CaptionStream$1,\n    Cea608Stream: Cea608Stream,\n    Cea708Stream: Cea708Stream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var streamTypes = {\n    H264_STREAM_TYPE: 0x1B,\n    ADTS_STREAM_TYPE: 0x0F,\n    METADATA_STREAM_TYPE: 0x15\n  };\n  var MAX_TS = 8589934592;\n  var RO_THRESH = 4294967296;\n  var TYPE_SHARED = 'shared';\n\n  var handleRollover$1 = function handleRollover(value, reference) {\n    var direction = 1;\n\n    if (value > reference) {\n      // If the current timestamp value is greater than our reference timestamp and we detect a\n      // timestamp rollover, this means the roll over is happening in the opposite direction.\n      // Example scenario: Enter a long stream/video just after a rollover occurred. The reference\n      // point will be set to a small number, e.g. 1. The user then seeks backwards over the\n      // rollover point. In loading this segment, the timestamp values will be very large,\n      // e.g. 2^33 - 1. Since this comes before the data we loaded previously, we want to adjust\n      // the time stamp to be `value - 2^33`.\n      direction = -1;\n    } // Note: A seek forwards or back that is greater than the RO_THRESH (2^32, ~13 hours) will\n    // cause an incorrect adjustment.\n\n\n    while (Math.abs(reference - value) > RO_THRESH) {\n      value += direction * MAX_TS;\n    }\n\n    return value;\n  };\n\n  var TimestampRolloverStream$1 = function TimestampRolloverStream(type) {\n    var lastDTS, referenceDTS;\n    TimestampRolloverStream.prototype.init.call(this); // The \"shared\" type is used in cases where a stream will contain muxed\n    // video and audio. We could use `undefined` here, but having a string\n    // makes debugging a little clearer.\n\n    this.type_ = type || TYPE_SHARED;\n\n    this.push = function (data) {\n      // Any \"shared\" rollover streams will accept _all_ data. Otherwise,\n      // streams will only accept data that matches their type.\n      if (this.type_ !== TYPE_SHARED && data.type !== this.type_) {\n        return;\n      }\n\n      if (referenceDTS === undefined) {\n        referenceDTS = data.dts;\n      }\n\n      data.dts = handleRollover$1(data.dts, referenceDTS);\n      data.pts = handleRollover$1(data.pts, referenceDTS);\n      lastDTS = data.dts;\n      this.trigger('data', data);\n    };\n\n    this.flush = function () {\n      referenceDTS = lastDTS;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.discontinuity = function () {\n      referenceDTS = void 0;\n      lastDTS = void 0;\n    };\n\n    this.reset = function () {\n      this.discontinuity();\n      this.trigger('reset');\n    };\n  };\n\n  TimestampRolloverStream$1.prototype = new stream();\n  var timestampRolloverStream = {\n    TimestampRolloverStream: TimestampRolloverStream$1,\n    handleRollover: handleRollover$1\n  };\n\n  var percentEncode$1 = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as UTf-8.\n  parseUtf8 = function parseUtf8(bytes, start, end) {\n    return decodeURIComponent(percentEncode$1(bytes, start, end));\n  },\n      // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n  parseIso88591$1 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode$1(bytes, start, end)); // jshint ignore:line\n  },\n      parseSyncSafeInteger$1 = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  },\n      tagParsers = {\n    TXXX: function TXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the text fields\n          tag.description = parseUtf8(tag.data, 1, i); // do not include the null terminator in the tag value\n\n          tag.value = parseUtf8(tag.data, i + 1, tag.data.length).replace(/\\0*$/, '');\n          break;\n        }\n      }\n\n      tag.data = tag.value;\n    },\n    WXXX: function WXXX(tag) {\n      var i;\n\n      if (tag.data[0] !== 3) {\n        // ignore frames with unrecognized character encodings\n        return;\n      }\n\n      for (i = 1; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.description = parseUtf8(tag.data, 1, i);\n          tag.url = parseUtf8(tag.data, i + 1, tag.data.length);\n          break;\n        }\n      }\n    },\n    PRIV: function PRIV(tag) {\n      var i;\n\n      for (i = 0; i < tag.data.length; i++) {\n        if (tag.data[i] === 0) {\n          // parse the description and URL fields\n          tag.owner = parseIso88591$1(tag.data, 0, i);\n          break;\n        }\n      }\n\n      tag.privateData = tag.data.subarray(i + 1);\n      tag.data = tag.privateData;\n    }\n  },\n      _MetadataStream;\n\n  _MetadataStream = function MetadataStream(options) {\n    var settings = {\n      // the bytes of the program-level descriptor field in MP2T\n      // see ISO/IEC 13818-1:2013 (E), section 2.6 \"Program and\n      // program element descriptors\"\n      descriptor: options && options.descriptor\n    },\n        // the total size in bytes of the ID3 tag being parsed\n    tagSize = 0,\n        // tag data that is not complete enough to be parsed\n    buffer = [],\n        // the total number of bytes currently in the buffer\n    bufferSize = 0,\n        i;\n\n    _MetadataStream.prototype.init.call(this); // calculate the text track in-band metadata track dispatch type\n    // https://html.spec.whatwg.org/multipage/embedded-content.html#steps-to-expose-a-media-resource-specific-text-track\n\n\n    this.dispatchType = streamTypes.METADATA_STREAM_TYPE.toString(16);\n\n    if (settings.descriptor) {\n      for (i = 0; i < settings.descriptor.length; i++) {\n        this.dispatchType += ('00' + settings.descriptor[i].toString(16)).slice(-2);\n      }\n    }\n\n    this.push = function (chunk) {\n      var tag, frameStart, frameSize, frame, i, frameHeader;\n\n      if (chunk.type !== 'timed-metadata') {\n        return;\n      } // if data_alignment_indicator is set in the PES header,\n      // we must have the start of a new ID3 tag. Assume anything\n      // remaining in the buffer was malformed and throw it out\n\n\n      if (chunk.dataAlignmentIndicator) {\n        bufferSize = 0;\n        buffer.length = 0;\n      } // ignore events that don't look like ID3 data\n\n\n      if (buffer.length === 0 && (chunk.data.length < 10 || chunk.data[0] !== 'I'.charCodeAt(0) || chunk.data[1] !== 'D'.charCodeAt(0) || chunk.data[2] !== '3'.charCodeAt(0))) {\n        this.trigger('log', {\n          level: 'warn',\n          message: 'Skipping unrecognized metadata packet'\n        });\n        return;\n      } // add this chunk to the data we've collected so far\n\n\n      buffer.push(chunk);\n      bufferSize += chunk.data.byteLength; // grab the size of the entire frame from the ID3 header\n\n      if (buffer.length === 1) {\n        // the frame size is transmitted as a 28-bit integer in the\n        // last four bytes of the ID3 header.\n        // The most significant bit of each byte is dropped and the\n        // results concatenated to recover the actual value.\n        tagSize = parseSyncSafeInteger$1(chunk.data.subarray(6, 10)); // ID3 reports the tag size excluding the header but it's more\n        // convenient for our comparisons to include it\n\n        tagSize += 10;\n      } // if the entire frame has not arrived, wait for more data\n\n\n      if (bufferSize < tagSize) {\n        return;\n      } // collect the entire frame so it can be parsed\n\n\n      tag = {\n        data: new Uint8Array(tagSize),\n        frames: [],\n        pts: buffer[0].pts,\n        dts: buffer[0].dts\n      };\n\n      for (i = 0; i < tagSize;) {\n        tag.data.set(buffer[0].data.subarray(0, tagSize - i), i);\n        i += buffer[0].data.byteLength;\n        bufferSize -= buffer[0].data.byteLength;\n        buffer.shift();\n      } // find the start of the first frame and the end of the tag\n\n\n      frameStart = 10;\n\n      if (tag.data[5] & 0x40) {\n        // advance the frame start past the extended header\n        frameStart += 4; // header size field\n\n        frameStart += parseSyncSafeInteger$1(tag.data.subarray(10, 14)); // clip any padding off the end\n\n        tagSize -= parseSyncSafeInteger$1(tag.data.subarray(16, 20));\n      } // parse one or more ID3 frames\n      // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n      do {\n        // determine the number of bytes in this frame\n        frameSize = parseSyncSafeInteger$1(tag.data.subarray(frameStart + 4, frameStart + 8));\n\n        if (frameSize < 1) {\n          this.trigger('log', {\n            level: 'warn',\n            message: 'Malformed ID3 frame encountered. Skipping metadata parsing.'\n          });\n          return;\n        }\n\n        frameHeader = String.fromCharCode(tag.data[frameStart], tag.data[frameStart + 1], tag.data[frameStart + 2], tag.data[frameStart + 3]);\n        frame = {\n          id: frameHeader,\n          data: tag.data.subarray(frameStart + 10, frameStart + frameSize + 10)\n        };\n        frame.key = frame.id;\n\n        if (tagParsers[frame.id]) {\n          tagParsers[frame.id](frame); // handle the special PRIV frame used to indicate the start\n          // time for raw AAC data\n\n          if (frame.owner === 'com.apple.streaming.transportStreamTimestamp') {\n            var d = frame.data,\n                size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n            size *= 4;\n            size += d[7] & 0x03;\n            frame.timeStamp = size; // in raw AAC, all subsequent data will be timestamped based\n            // on the value of this frame\n            // we couldn't have known the appropriate pts and dts before\n            // parsing this ID3 tag so set those values now\n\n            if (tag.pts === undefined && tag.dts === undefined) {\n              tag.pts = frame.timeStamp;\n              tag.dts = frame.timeStamp;\n            }\n\n            this.trigger('timestamp', frame);\n          }\n        }\n\n        tag.frames.push(frame);\n        frameStart += 10; // advance past the frame header\n\n        frameStart += frameSize; // advance past the frame body\n      } while (frameStart < tagSize);\n\n      this.trigger('data', tag);\n    };\n  };\n\n  _MetadataStream.prototype = new stream();\n  var metadataStream = _MetadataStream;\n  var TimestampRolloverStream = timestampRolloverStream.TimestampRolloverStream; // object types\n\n  var _TransportPacketStream, _TransportParseStream, _ElementaryStream; // constants\n\n\n  var MP2T_PACKET_LENGTH$1 = 188,\n      // bytes\n  SYNC_BYTE$1 = 0x47;\n  /**\n   * Splits an incoming stream of binary data into MPEG-2 Transport\n   * Stream packets.\n   */\n\n  _TransportPacketStream = function TransportPacketStream() {\n    var buffer = new Uint8Array(MP2T_PACKET_LENGTH$1),\n        bytesInBuffer = 0;\n\n    _TransportPacketStream.prototype.init.call(this); // Deliver new bytes to the stream.\n\n    /**\n     * Split a stream of data into M2TS packets\n    **/\n\n\n    this.push = function (bytes) {\n      var startIndex = 0,\n          endIndex = MP2T_PACKET_LENGTH$1,\n          everything; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (bytesInBuffer) {\n        everything = new Uint8Array(bytes.byteLength + bytesInBuffer);\n        everything.set(buffer.subarray(0, bytesInBuffer));\n        everything.set(bytes, bytesInBuffer);\n        bytesInBuffer = 0;\n      } else {\n        everything = bytes;\n      } // While we have enough data for a packet\n\n\n      while (endIndex < everything.byteLength) {\n        // Look for a pair of start and end sync bytes in the data..\n        if (everything[startIndex] === SYNC_BYTE$1 && everything[endIndex] === SYNC_BYTE$1) {\n          // We found a packet so emit it and jump one whole packet forward in\n          // the stream\n          this.trigger('data', everything.subarray(startIndex, endIndex));\n          startIndex += MP2T_PACKET_LENGTH$1;\n          endIndex += MP2T_PACKET_LENGTH$1;\n          continue;\n        } // If we get here, we have somehow become de-synchronized and we need to step\n        // forward one byte at a time until we find a pair of sync bytes that denote\n        // a packet\n\n\n        startIndex++;\n        endIndex++;\n      } // If there was some data left over at the end of the segment that couldn't\n      // possibly be a whole packet, keep it because it might be the start of a packet\n      // that continues in the next segment\n\n\n      if (startIndex < everything.byteLength) {\n        buffer.set(everything.subarray(startIndex), 0);\n        bytesInBuffer = everything.byteLength - startIndex;\n      }\n    };\n    /**\n     * Passes identified M2TS packets to the TransportParseStream to be parsed\n    **/\n\n\n    this.flush = function () {\n      // If the buffer contains a whole packet when we are being flushed, emit it\n      // and empty the buffer. Otherwise hold onto the data because it may be\n      // important for decoding the next segment\n      if (bytesInBuffer === MP2T_PACKET_LENGTH$1 && buffer[0] === SYNC_BYTE$1) {\n        this.trigger('data', buffer);\n        bytesInBuffer = 0;\n      }\n\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n\n    this.reset = function () {\n      bytesInBuffer = 0;\n      this.trigger('reset');\n    };\n  };\n\n  _TransportPacketStream.prototype = new stream();\n  /**\n   * Accepts an MP2T TransportPacketStream and emits data events with parsed\n   * forms of the individual transport stream packets.\n   */\n\n  _TransportParseStream = function TransportParseStream() {\n    var parsePsi, parsePat, parsePmt, self;\n\n    _TransportParseStream.prototype.init.call(this);\n\n    self = this;\n    this.packetsWaitingForPmt = [];\n    this.programMapTable = undefined;\n\n    parsePsi = function parsePsi(payload, psi) {\n      var offset = 0; // PSI packets may be split into multiple sections and those\n      // sections may be split into multiple packets. If a PSI\n      // section starts in this packet, the payload_unit_start_indicator\n      // will be true and the first byte of the payload will indicate\n      // the offset from the current position to the start of the\n      // section.\n\n      if (psi.payloadUnitStartIndicator) {\n        offset += payload[offset] + 1;\n      }\n\n      if (psi.type === 'pat') {\n        parsePat(payload.subarray(offset), psi);\n      } else {\n        parsePmt(payload.subarray(offset), psi);\n      }\n    };\n\n    parsePat = function parsePat(payload, pat) {\n      pat.section_number = payload[7]; // eslint-disable-line camelcase\n\n      pat.last_section_number = payload[8]; // eslint-disable-line camelcase\n      // skip the PSI header and parse the first PMT entry\n\n      self.pmtPid = (payload[10] & 0x1F) << 8 | payload[11];\n      pat.pmtPid = self.pmtPid;\n    };\n    /**\n     * Parse out the relevant fields of a Program Map Table (PMT).\n     * @param payload {Uint8Array} the PMT-specific portion of an MP2T\n     * packet. The first byte in this array should be the table_id\n     * field.\n     * @param pmt {object} the object that should be decorated with\n     * fields parsed from the PMT.\n     */\n\n\n    parsePmt = function parsePmt(payload, pmt) {\n      var sectionLength, tableEnd, programInfoLength, offset; // PMTs can be sent ahead of the time when they should actually\n      // take effect. We don't believe this should ever be the case\n      // for HLS but we'll ignore \"forward\" PMT declarations if we see\n      // them. Future PMT declarations have the current_next_indicator\n      // set to zero.\n\n      if (!(payload[5] & 0x01)) {\n        return;\n      } // overwrite any existing program map table\n\n\n      self.programMapTable = {\n        video: null,\n        audio: null,\n        'timed-metadata': {}\n      }; // the mapping table ends at the end of the current section\n\n      sectionLength = (payload[1] & 0x0f) << 8 | payload[2];\n      tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n      // long the program info descriptors are\n\n      programInfoLength = (payload[10] & 0x0f) << 8 | payload[11]; // advance the offset to the first entry in the mapping table\n\n      offset = 12 + programInfoLength;\n\n      while (offset < tableEnd) {\n        var streamType = payload[offset];\n        var pid = (payload[offset + 1] & 0x1F) << 8 | payload[offset + 2]; // only map a single elementary_pid for audio and video stream types\n        // TODO: should this be done for metadata too? for now maintain behavior of\n        //       multiple metadata streams\n\n        if (streamType === streamTypes.H264_STREAM_TYPE && self.programMapTable.video === null) {\n          self.programMapTable.video = pid;\n        } else if (streamType === streamTypes.ADTS_STREAM_TYPE && self.programMapTable.audio === null) {\n          self.programMapTable.audio = pid;\n        } else if (streamType === streamTypes.METADATA_STREAM_TYPE) {\n          // map pid to stream type for metadata streams\n          self.programMapTable['timed-metadata'][pid] = streamType;\n        } // move to the next table entry\n        // skip past the elementary stream descriptors, if present\n\n\n        offset += ((payload[offset + 3] & 0x0F) << 8 | payload[offset + 4]) + 5;\n      } // record the map on the packet as well\n\n\n      pmt.programMapTable = self.programMapTable;\n    };\n    /**\n     * Deliver a new MP2T packet to the next stream in the pipeline.\n     */\n\n\n    this.push = function (packet) {\n      var result = {},\n          offset = 4;\n      result.payloadUnitStartIndicator = !!(packet[1] & 0x40); // pid is a 13-bit field starting at the last bit of packet[1]\n\n      result.pid = packet[1] & 0x1f;\n      result.pid <<= 8;\n      result.pid |= packet[2]; // if an adaption field is present, its length is specified by the\n      // fifth byte of the TS packet header. The adaptation field is\n      // used to add stuffing to PES packets that don't fill a complete\n      // TS packet, and to specify some forms of timing and control data\n      // that we do not currently use.\n\n      if ((packet[3] & 0x30) >>> 4 > 0x01) {\n        offset += packet[offset] + 1;\n      } // parse the rest of the packet based on the type\n\n\n      if (result.pid === 0) {\n        result.type = 'pat';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result);\n      } else if (result.pid === this.pmtPid) {\n        result.type = 'pmt';\n        parsePsi(packet.subarray(offset), result);\n        this.trigger('data', result); // if there are any packets waiting for a PMT to be found, process them now\n\n        while (this.packetsWaitingForPmt.length) {\n          this.processPes_.apply(this, this.packetsWaitingForPmt.shift());\n        }\n      } else if (this.programMapTable === undefined) {\n        // When we have not seen a PMT yet, defer further processing of\n        // PES packets until one has been parsed\n        this.packetsWaitingForPmt.push([packet, offset, result]);\n      } else {\n        this.processPes_(packet, offset, result);\n      }\n    };\n\n    this.processPes_ = function (packet, offset, result) {\n      // set the appropriate stream type\n      if (result.pid === this.programMapTable.video) {\n        result.streamType = streamTypes.H264_STREAM_TYPE;\n      } else if (result.pid === this.programMapTable.audio) {\n        result.streamType = streamTypes.ADTS_STREAM_TYPE;\n      } else {\n        // if not video or audio, it is timed-metadata or unknown\n        // if unknown, streamType will be undefined\n        result.streamType = this.programMapTable['timed-metadata'][result.pid];\n      }\n\n      result.type = 'pes';\n      result.data = packet.subarray(offset);\n      this.trigger('data', result);\n    };\n  };\n\n  _TransportParseStream.prototype = new stream();\n  _TransportParseStream.STREAM_TYPES = {\n    h264: 0x1b,\n    adts: 0x0f\n  };\n  /**\n   * Reconsistutes program elementary stream (PES) packets from parsed\n   * transport stream packets. That is, if you pipe an\n   * mp2t.TransportParseStream into a mp2t.ElementaryStream, the output\n   * events will be events which capture the bytes for individual PES\n   * packets plus relevant metadata that has been extracted from the\n   * container.\n   */\n\n  _ElementaryStream = function ElementaryStream() {\n    var self = this,\n        segmentHadPmt = false,\n        // PES packet fragments\n    video = {\n      data: [],\n      size: 0\n    },\n        audio = {\n      data: [],\n      size: 0\n    },\n        timedMetadata = {\n      data: [],\n      size: 0\n    },\n        programMapTable,\n        parsePes = function parsePes(payload, pes) {\n      var ptsDtsFlags;\n      var startPrefix = payload[0] << 16 | payload[1] << 8 | payload[2]; // default to an empty array\n\n      pes.data = new Uint8Array(); // In certain live streams, the start of a TS fragment has ts packets\n      // that are frame data that is continuing from the previous fragment. This\n      // is to check that the pes data is the start of a new pes payload\n\n      if (startPrefix !== 1) {\n        return;\n      } // get the packet length, this will be 0 for video\n\n\n      pes.packetLength = 6 + (payload[4] << 8 | payload[5]); // find out if this packets starts a new keyframe\n\n      pes.dataAlignmentIndicator = (payload[6] & 0x04) !== 0; // PES packets may be annotated with a PTS value, or a PTS value\n      // and a DTS value. Determine what combination of values is\n      // available to work with.\n\n      ptsDtsFlags = payload[7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n      // performs all bitwise operations on 32-bit integers but javascript\n      // supports a much greater range (52-bits) of integer using standard\n      // mathematical operations.\n      // We construct a 31-bit value using bitwise operators over the 31\n      // most significant bits and then multiply by 4 (equal to a left-shift\n      // of 2) before we add the final 2 least significant bits of the\n      // timestamp (equal to an OR.)\n\n      if (ptsDtsFlags & 0xC0) {\n        // the PTS and DTS are not written out directly. For information\n        // on how they are encoded, see\n        // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n        pes.pts = (payload[9] & 0x0E) << 27 | (payload[10] & 0xFF) << 20 | (payload[11] & 0xFE) << 12 | (payload[12] & 0xFF) << 5 | (payload[13] & 0xFE) >>> 3;\n        pes.pts *= 4; // Left shift by 2\n\n        pes.pts += (payload[13] & 0x06) >>> 1; // OR by the two LSBs\n\n        pes.dts = pes.pts;\n\n        if (ptsDtsFlags & 0x40) {\n          pes.dts = (payload[14] & 0x0E) << 27 | (payload[15] & 0xFF) << 20 | (payload[16] & 0xFE) << 12 | (payload[17] & 0xFF) << 5 | (payload[18] & 0xFE) >>> 3;\n          pes.dts *= 4; // Left shift by 2\n\n          pes.dts += (payload[18] & 0x06) >>> 1; // OR by the two LSBs\n        }\n      } // the data section starts immediately after the PES header.\n      // pes_header_data_length specifies the number of header bytes\n      // that follow the last byte of the field.\n\n\n      pes.data = payload.subarray(9 + payload[8]);\n    },\n\n    /**\n      * Pass completely parsed PES packets to the next stream in the pipeline\n     **/\n    flushStream = function flushStream(stream, type, forceFlush) {\n      var packetData = new Uint8Array(stream.size),\n          event = {\n        type: type\n      },\n          i = 0,\n          offset = 0,\n          packetFlushable = false,\n          fragment; // do nothing if there is not enough buffered data for a complete\n      // PES header\n\n      if (!stream.data.length || stream.size < 9) {\n        return;\n      }\n\n      event.trackId = stream.data[0].pid; // reassemble the packet\n\n      for (i = 0; i < stream.data.length; i++) {\n        fragment = stream.data[i];\n        packetData.set(fragment.data, offset);\n        offset += fragment.data.byteLength;\n      } // parse assembled packet's PES header\n\n\n      parsePes(packetData, event); // non-video PES packets MUST have a non-zero PES_packet_length\n      // check that there is enough stream data to fill the packet\n\n      packetFlushable = type === 'video' || event.packetLength <= stream.size; // flush pending packets if the conditions are right\n\n      if (forceFlush || packetFlushable) {\n        stream.size = 0;\n        stream.data.length = 0;\n      } // only emit packets that are complete. this is to avoid assembling\n      // incomplete PES packets due to poor segmentation\n\n\n      if (packetFlushable) {\n        self.trigger('data', event);\n      }\n    };\n\n    _ElementaryStream.prototype.init.call(this);\n    /**\n     * Identifies M2TS packet types and parses PES packets using metadata\n     * parsed from the PMT\n     **/\n\n\n    this.push = function (data) {\n      ({\n        pat: function pat() {// we have to wait for the PMT to arrive as well before we\n          // have any meaningful metadata\n        },\n        pes: function pes() {\n          var stream, streamType;\n\n          switch (data.streamType) {\n            case streamTypes.H264_STREAM_TYPE:\n              stream = video;\n              streamType = 'video';\n              break;\n\n            case streamTypes.ADTS_STREAM_TYPE:\n              stream = audio;\n              streamType = 'audio';\n              break;\n\n            case streamTypes.METADATA_STREAM_TYPE:\n              stream = timedMetadata;\n              streamType = 'timed-metadata';\n              break;\n\n            default:\n              // ignore unknown stream types\n              return;\n          } // if a new packet is starting, we can flush the completed\n          // packet\n\n\n          if (data.payloadUnitStartIndicator) {\n            flushStream(stream, streamType, true);\n          } // buffer this fragment until we are sure we've received the\n          // complete payload\n\n\n          stream.data.push(data);\n          stream.size += data.data.byteLength;\n        },\n        pmt: function pmt() {\n          var event = {\n            type: 'metadata',\n            tracks: []\n          };\n          programMapTable = data.programMapTable; // translate audio and video streams to tracks\n\n          if (programMapTable.video !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.video,\n              codec: 'avc',\n              type: 'video'\n            });\n          }\n\n          if (programMapTable.audio !== null) {\n            event.tracks.push({\n              timelineStartInfo: {\n                baseMediaDecodeTime: 0\n              },\n              id: +programMapTable.audio,\n              codec: 'adts',\n              type: 'audio'\n            });\n          }\n\n          segmentHadPmt = true;\n          self.trigger('data', event);\n        }\n      })[data.type]();\n    };\n\n    this.reset = function () {\n      video.size = 0;\n      video.data.length = 0;\n      audio.size = 0;\n      audio.data.length = 0;\n      this.trigger('reset');\n    };\n    /**\n     * Flush any remaining input. Video PES packets may be of variable\n     * length. Normally, the start of a new video packet can trigger the\n     * finalization of the previous packet. That is not possible if no\n     * more video is forthcoming, however. In that case, some other\n     * mechanism (like the end of the file) has to be employed. When it is\n     * clear that no additional data is forthcoming, calling this method\n     * will flush the buffered packets.\n     */\n\n\n    this.flushStreams_ = function () {\n      // !!THIS ORDER IS IMPORTANT!!\n      // video first then audio\n      flushStream(video, 'video');\n      flushStream(audio, 'audio');\n      flushStream(timedMetadata, 'timed-metadata');\n    };\n\n    this.flush = function () {\n      // if on flush we haven't had a pmt emitted\n      // and we have a pmt to emit. emit the pmt\n      // so that we trigger a trackinfo downstream.\n      if (!segmentHadPmt && programMapTable) {\n        var pmt = {\n          type: 'metadata',\n          tracks: []\n        }; // translate audio and video streams to tracks\n\n        if (programMapTable.video !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.video,\n            codec: 'avc',\n            type: 'video'\n          });\n        }\n\n        if (programMapTable.audio !== null) {\n          pmt.tracks.push({\n            timelineStartInfo: {\n              baseMediaDecodeTime: 0\n            },\n            id: +programMapTable.audio,\n            codec: 'adts',\n            type: 'audio'\n          });\n        }\n\n        self.trigger('data', pmt);\n      }\n\n      segmentHadPmt = false;\n      this.flushStreams_();\n      this.trigger('done');\n    };\n  };\n\n  _ElementaryStream.prototype = new stream();\n  var m2ts = {\n    PAT_PID: 0x0000,\n    MP2T_PACKET_LENGTH: MP2T_PACKET_LENGTH$1,\n    TransportPacketStream: _TransportPacketStream,\n    TransportParseStream: _TransportParseStream,\n    ElementaryStream: _ElementaryStream,\n    TimestampRolloverStream: TimestampRolloverStream,\n    CaptionStream: captionStream.CaptionStream,\n    Cea608Stream: captionStream.Cea608Stream,\n    Cea708Stream: captionStream.Cea708Stream,\n    MetadataStream: metadataStream\n  };\n\n  for (var type in streamTypes) {\n    if (streamTypes.hasOwnProperty(type)) {\n      m2ts[type] = streamTypes[type];\n    }\n  }\n\n  var m2ts_1 = m2ts;\n  var ONE_SECOND_IN_TS$2 = clock.ONE_SECOND_IN_TS;\n\n  var _AdtsStream;\n\n  var ADTS_SAMPLING_FREQUENCIES$1 = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n  /*\n   * Accepts a ElementaryStream and emits data events with parsed\n   * AAC Audio Frames of the individual packets. Input audio in ADTS\n   * format is unpacked and re-emitted as AAC frames.\n   *\n   * @see http://wiki.multimedia.cx/index.php?title=ADTS\n   * @see http://wiki.multimedia.cx/?title=Understanding_AAC\n   */\n\n  _AdtsStream = function AdtsStream(handlePartialSegments) {\n    var buffer,\n        frameNum = 0;\n\n    _AdtsStream.prototype.init.call(this);\n\n    this.skipWarn_ = function (start, end) {\n      this.trigger('log', {\n        level: 'warn',\n        message: \"adts skiping bytes \" + start + \" to \" + end + \" in frame \" + frameNum + \" outside syncword\"\n      });\n    };\n\n    this.push = function (packet) {\n      var i = 0,\n          frameLength,\n          protectionSkipBytes,\n          oldBuffer,\n          sampleCount,\n          adtsFrameDuration;\n\n      if (!handlePartialSegments) {\n        frameNum = 0;\n      }\n\n      if (packet.type !== 'audio') {\n        // ignore non-audio data\n        return;\n      } // Prepend any data in the buffer to the input data so that we can parse\n      // aac frames the cross a PES packet boundary\n\n\n      if (buffer && buffer.length) {\n        oldBuffer = buffer;\n        buffer = new Uint8Array(oldBuffer.byteLength + packet.data.byteLength);\n        buffer.set(oldBuffer);\n        buffer.set(packet.data, oldBuffer.byteLength);\n      } else {\n        buffer = packet.data;\n      } // unpack any ADTS frames which have been fully received\n      // for details on the ADTS header, see http://wiki.multimedia.cx/index.php?title=ADTS\n\n\n      var skip; // We use i + 7 here because we want to be able to parse the entire header.\n      // If we don't have enough bytes to do that, then we definitely won't have a full frame.\n\n      while (i + 7 < buffer.length) {\n        // Look for the start of an ADTS header..\n        if (buffer[i] !== 0xFF || (buffer[i + 1] & 0xF6) !== 0xF0) {\n          if (typeof skip !== 'number') {\n            skip = i;\n          } // If a valid header was not found,  jump one forward and attempt to\n          // find a valid ADTS header starting at the next byte\n\n\n          i++;\n          continue;\n        }\n\n        if (typeof skip === 'number') {\n          this.skipWarn_(skip, i);\n          skip = null;\n        } // The protection skip bit tells us if we have 2 bytes of CRC data at the\n        // end of the ADTS header\n\n\n        protectionSkipBytes = (~buffer[i + 1] & 0x01) * 2; // Frame length is a 13 bit integer starting 16 bits from the\n        // end of the sync sequence\n        // NOTE: frame length includes the size of the header\n\n        frameLength = (buffer[i + 3] & 0x03) << 11 | buffer[i + 4] << 3 | (buffer[i + 5] & 0xe0) >> 5;\n        sampleCount = ((buffer[i + 6] & 0x03) + 1) * 1024;\n        adtsFrameDuration = sampleCount * ONE_SECOND_IN_TS$2 / ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2]; // If we don't have enough data to actually finish this ADTS frame,\n        // then we have to wait for more data\n\n        if (buffer.byteLength - i < frameLength) {\n          break;\n        } // Otherwise, deliver the complete AAC frame\n\n\n        this.trigger('data', {\n          pts: packet.pts + frameNum * adtsFrameDuration,\n          dts: packet.dts + frameNum * adtsFrameDuration,\n          sampleCount: sampleCount,\n          audioobjecttype: (buffer[i + 2] >>> 6 & 0x03) + 1,\n          channelcount: (buffer[i + 2] & 1) << 2 | (buffer[i + 3] & 0xc0) >>> 6,\n          samplerate: ADTS_SAMPLING_FREQUENCIES$1[(buffer[i + 2] & 0x3c) >>> 2],\n          samplingfrequencyindex: (buffer[i + 2] & 0x3c) >>> 2,\n          // assume ISO/IEC 14496-12 AudioSampleEntry default of 16\n          samplesize: 16,\n          // data is the frame without it's header\n          data: buffer.subarray(i + 7 + protectionSkipBytes, i + frameLength)\n        });\n        frameNum++;\n        i += frameLength;\n      }\n\n      if (typeof skip === 'number') {\n        this.skipWarn_(skip, i);\n        skip = null;\n      } // remove processed bytes from the buffer.\n\n\n      buffer = buffer.subarray(i);\n    };\n\n    this.flush = function () {\n      frameNum = 0;\n      this.trigger('done');\n    };\n\n    this.reset = function () {\n      buffer = void 0;\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      buffer = void 0;\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AdtsStream.prototype = new stream();\n  var adts = _AdtsStream;\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var ExpGolomb;\n  /**\n   * Parser for exponential Golomb codes, a variable-bitwidth number encoding\n   * scheme used by h264.\n   */\n\n  ExpGolomb = function ExpGolomb(workingData) {\n    var // the number of bytes left to examine in workingData\n    workingBytesAvailable = workingData.byteLength,\n        // the current word being examined\n    workingWord = 0,\n        // :uint\n    // the number of bits left to examine in the current word\n    workingBitsAvailable = 0; // :uint;\n    // ():uint\n\n    this.length = function () {\n      return 8 * workingBytesAvailable;\n    }; // ():uint\n\n\n    this.bitsAvailable = function () {\n      return 8 * workingBytesAvailable + workingBitsAvailable;\n    }; // ():void\n\n\n    this.loadWord = function () {\n      var position = workingData.byteLength - workingBytesAvailable,\n          workingBytes = new Uint8Array(4),\n          availableBytes = Math.min(4, workingBytesAvailable);\n\n      if (availableBytes === 0) {\n        throw new Error('no bytes available');\n      }\n\n      workingBytes.set(workingData.subarray(position, position + availableBytes));\n      workingWord = new DataView(workingBytes.buffer).getUint32(0); // track the amount of workingData that has been processed\n\n      workingBitsAvailable = availableBytes * 8;\n      workingBytesAvailable -= availableBytes;\n    }; // (count:int):void\n\n\n    this.skipBits = function (count) {\n      var skipBytes; // :int\n\n      if (workingBitsAvailable > count) {\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      } else {\n        count -= workingBitsAvailable;\n        skipBytes = Math.floor(count / 8);\n        count -= skipBytes * 8;\n        workingBytesAvailable -= skipBytes;\n        this.loadWord();\n        workingWord <<= count;\n        workingBitsAvailable -= count;\n      }\n    }; // (size:int):uint\n\n\n    this.readBits = function (size) {\n      var bits = Math.min(workingBitsAvailable, size),\n          // :uint\n      valu = workingWord >>> 32 - bits; // :uint\n      // if size > 31, handle error\n\n      workingBitsAvailable -= bits;\n\n      if (workingBitsAvailable > 0) {\n        workingWord <<= bits;\n      } else if (workingBytesAvailable > 0) {\n        this.loadWord();\n      }\n\n      bits = size - bits;\n\n      if (bits > 0) {\n        return valu << bits | this.readBits(bits);\n      }\n\n      return valu;\n    }; // ():uint\n\n\n    this.skipLeadingZeros = function () {\n      var leadingZeroCount; // :uint\n\n      for (leadingZeroCount = 0; leadingZeroCount < workingBitsAvailable; ++leadingZeroCount) {\n        if ((workingWord & 0x80000000 >>> leadingZeroCount) !== 0) {\n          // the first bit of working word is 1\n          workingWord <<= leadingZeroCount;\n          workingBitsAvailable -= leadingZeroCount;\n          return leadingZeroCount;\n        }\n      } // we exhausted workingWord and still have not found a 1\n\n\n      this.loadWord();\n      return leadingZeroCount + this.skipLeadingZeros();\n    }; // ():void\n\n\n    this.skipUnsignedExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():void\n\n\n    this.skipExpGolomb = function () {\n      this.skipBits(1 + this.skipLeadingZeros());\n    }; // ():uint\n\n\n    this.readUnsignedExpGolomb = function () {\n      var clz = this.skipLeadingZeros(); // :uint\n\n      return this.readBits(clz + 1) - 1;\n    }; // ():int\n\n\n    this.readExpGolomb = function () {\n      var valu = this.readUnsignedExpGolomb(); // :int\n\n      if (0x01 & valu) {\n        // the number is odd if the low order bit is set\n        return 1 + valu >>> 1; // add 1 to make it even, and divide by 2\n      }\n\n      return -1 * (valu >>> 1); // divide by two then make it negative\n    }; // Some convenience functions\n    // :Boolean\n\n\n    this.readBoolean = function () {\n      return this.readBits(1) === 1;\n    }; // ():int\n\n\n    this.readUnsignedByte = function () {\n      return this.readBits(8);\n    };\n\n    this.loadWord();\n  };\n\n  var expGolomb = ExpGolomb;\n\n  var _H264Stream, _NalByteStream;\n\n  var PROFILES_WITH_OPTIONAL_SPS_DATA;\n  /**\n   * Accepts a NAL unit byte stream and unpacks the embedded NAL units.\n   */\n\n  _NalByteStream = function NalByteStream() {\n    var syncPoint = 0,\n        i,\n        buffer;\n\n    _NalByteStream.prototype.init.call(this);\n    /*\n     * Scans a byte stream and triggers a data event with the NAL units found.\n     * @param {Object} data Event received from H264Stream\n     * @param {Uint8Array} data.data The h264 byte stream to be scanned\n     *\n     * @see H264Stream.push\n     */\n\n\n    this.push = function (data) {\n      var swapBuffer;\n\n      if (!buffer) {\n        buffer = data.data;\n      } else {\n        swapBuffer = new Uint8Array(buffer.byteLength + data.data.byteLength);\n        swapBuffer.set(buffer);\n        swapBuffer.set(data.data, buffer.byteLength);\n        buffer = swapBuffer;\n      }\n\n      var len = buffer.byteLength; // Rec. ITU-T H.264, Annex B\n      // scan for NAL unit boundaries\n      // a match looks like this:\n      // 0 0 1 .. NAL .. 0 0 1\n      // ^ sync point        ^ i\n      // or this:\n      // 0 0 1 .. NAL .. 0 0 0\n      // ^ sync point        ^ i\n      // advance the sync point to a NAL start, if necessary\n\n      for (; syncPoint < len - 3; syncPoint++) {\n        if (buffer[syncPoint + 2] === 1) {\n          // the sync point is properly aligned\n          i = syncPoint + 5;\n          break;\n        }\n      }\n\n      while (i < len) {\n        // look at the current byte to determine if we've hit the end of\n        // a NAL unit boundary\n        switch (buffer[i]) {\n          case 0:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0) {\n              i += 2;\n              break;\n            } else if (buffer[i - 2] !== 0) {\n              i++;\n              break;\n            } // deliver the NAL unit if it isn't empty\n\n\n            if (syncPoint + 3 !== i - 2) {\n              this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            } // drop trailing zeroes\n\n\n            do {\n              i++;\n            } while (buffer[i] !== 1 && i < len);\n\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          case 1:\n            // skip past non-sync sequences\n            if (buffer[i - 1] !== 0 || buffer[i - 2] !== 0) {\n              i += 3;\n              break;\n            } // deliver the NAL unit\n\n\n            this.trigger('data', buffer.subarray(syncPoint + 3, i - 2));\n            syncPoint = i - 2;\n            i += 3;\n            break;\n\n          default:\n            // the current byte isn't a one or zero, so it cannot be part\n            // of a sync sequence\n            i += 3;\n            break;\n        }\n      } // filter out the NAL units that were delivered\n\n\n      buffer = buffer.subarray(syncPoint);\n      i -= syncPoint;\n      syncPoint = 0;\n    };\n\n    this.reset = function () {\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('reset');\n    };\n\n    this.flush = function () {\n      // deliver the last buffered NAL unit\n      if (buffer && buffer.byteLength > 3) {\n        this.trigger('data', buffer.subarray(syncPoint + 3));\n      } // reset the stream state\n\n\n      buffer = null;\n      syncPoint = 0;\n      this.trigger('done');\n    };\n\n    this.endTimeline = function () {\n      this.flush();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _NalByteStream.prototype = new stream(); // values of profile_idc that indicate additional fields are included in the SPS\n  // see Recommendation ITU-T H.264 (4/2013),\n  // 7.3.2.1.1 Sequence parameter set data syntax\n\n  PROFILES_WITH_OPTIONAL_SPS_DATA = {\n    100: true,\n    110: true,\n    122: true,\n    244: true,\n    44: true,\n    83: true,\n    86: true,\n    118: true,\n    128: true,\n    // TODO: the three profiles below don't\n    // appear to have sps data in the specificiation anymore?\n    138: true,\n    139: true,\n    134: true\n  };\n  /**\n   * Accepts input from a ElementaryStream and produces H.264 NAL unit data\n   * events.\n   */\n\n  _H264Stream = function H264Stream() {\n    var nalByteStream = new _NalByteStream(),\n        self,\n        trackId,\n        currentPts,\n        currentDts,\n        discardEmulationPreventionBytes,\n        readSequenceParameterSet,\n        skipScalingList;\n\n    _H264Stream.prototype.init.call(this);\n\n    self = this;\n    /*\n     * Pushes a packet from a stream onto the NalByteStream\n     *\n     * @param {Object} packet - A packet received from a stream\n     * @param {Uint8Array} packet.data - The raw bytes of the packet\n     * @param {Number} packet.dts - Decode timestamp of the packet\n     * @param {Number} packet.pts - Presentation timestamp of the packet\n     * @param {Number} packet.trackId - The id of the h264 track this packet came from\n     * @param {('video'|'audio')} packet.type - The type of packet\n     *\n     */\n\n    this.push = function (packet) {\n      if (packet.type !== 'video') {\n        return;\n      }\n\n      trackId = packet.trackId;\n      currentPts = packet.pts;\n      currentDts = packet.dts;\n      nalByteStream.push(packet);\n    };\n    /*\n     * Identify NAL unit types and pass on the NALU, trackId, presentation and decode timestamps\n     * for the NALUs to the next stream component.\n     * Also, preprocess caption and sequence parameter NALUs.\n     *\n     * @param {Uint8Array} data - A NAL unit identified by `NalByteStream.push`\n     * @see NalByteStream.push\n     */\n\n\n    nalByteStream.on('data', function (data) {\n      var event = {\n        trackId: trackId,\n        pts: currentPts,\n        dts: currentDts,\n        data: data,\n        nalUnitTypeCode: data[0] & 0x1f\n      };\n\n      switch (event.nalUnitTypeCode) {\n        case 0x05:\n          event.nalUnitType = 'slice_layer_without_partitioning_rbsp_idr';\n          break;\n\n        case 0x06:\n          event.nalUnitType = 'sei_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          break;\n\n        case 0x07:\n          event.nalUnitType = 'seq_parameter_set_rbsp';\n          event.escapedRBSP = discardEmulationPreventionBytes(data.subarray(1));\n          event.config = readSequenceParameterSet(event.escapedRBSP);\n          break;\n\n        case 0x08:\n          event.nalUnitType = 'pic_parameter_set_rbsp';\n          break;\n\n        case 0x09:\n          event.nalUnitType = 'access_unit_delimiter_rbsp';\n          break;\n      } // This triggers data on the H264Stream\n\n\n      self.trigger('data', event);\n    });\n    nalByteStream.on('done', function () {\n      self.trigger('done');\n    });\n    nalByteStream.on('partialdone', function () {\n      self.trigger('partialdone');\n    });\n    nalByteStream.on('reset', function () {\n      self.trigger('reset');\n    });\n    nalByteStream.on('endedtimeline', function () {\n      self.trigger('endedtimeline');\n    });\n\n    this.flush = function () {\n      nalByteStream.flush();\n    };\n\n    this.partialFlush = function () {\n      nalByteStream.partialFlush();\n    };\n\n    this.reset = function () {\n      nalByteStream.reset();\n    };\n\n    this.endTimeline = function () {\n      nalByteStream.endTimeline();\n    };\n    /**\n     * Advance the ExpGolomb decoder past a scaling list. The scaling\n     * list is optionally transmitted as part of a sequence parameter\n     * set and is not relevant to transmuxing.\n     * @param count {number} the number of entries in this scaling list\n     * @param expGolombDecoder {object} an ExpGolomb pointed to the\n     * start of a scaling list\n     * @see Recommendation ITU-T H.264, Section 7.3.2.1.1.1\n     */\n\n\n    skipScalingList = function skipScalingList(count, expGolombDecoder) {\n      var lastScale = 8,\n          nextScale = 8,\n          j,\n          deltaScale;\n\n      for (j = 0; j < count; j++) {\n        if (nextScale !== 0) {\n          deltaScale = expGolombDecoder.readExpGolomb();\n          nextScale = (lastScale + deltaScale + 256) % 256;\n        }\n\n        lastScale = nextScale === 0 ? lastScale : nextScale;\n      }\n    };\n    /**\n     * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n     * Sequence Payload\"\n     * @param data {Uint8Array} the bytes of a RBSP from a NAL\n     * unit\n     * @return {Uint8Array} the RBSP without any Emulation\n     * Prevention Bytes\n     */\n\n\n    discardEmulationPreventionBytes = function discardEmulationPreventionBytes(data) {\n      var length = data.byteLength,\n          emulationPreventionBytesPositions = [],\n          i = 1,\n          newLength,\n          newData; // Find all `Emulation Prevention Bytes`\n\n      while (i < length - 2) {\n        if (data[i] === 0 && data[i + 1] === 0 && data[i + 2] === 0x03) {\n          emulationPreventionBytesPositions.push(i + 2);\n          i += 2;\n        } else {\n          i++;\n        }\n      } // If no Emulation Prevention Bytes were found just return the original\n      // array\n\n\n      if (emulationPreventionBytesPositions.length === 0) {\n        return data;\n      } // Create a new array to hold the NAL unit data\n\n\n      newLength = length - emulationPreventionBytesPositions.length;\n      newData = new Uint8Array(newLength);\n      var sourceIndex = 0;\n\n      for (i = 0; i < newLength; sourceIndex++, i++) {\n        if (sourceIndex === emulationPreventionBytesPositions[0]) {\n          // Skip this byte\n          sourceIndex++; // Remove this position index\n\n          emulationPreventionBytesPositions.shift();\n        }\n\n        newData[i] = data[sourceIndex];\n      }\n\n      return newData;\n    };\n    /**\n     * Read a sequence parameter set and return some interesting video\n     * properties. A sequence parameter set is the H264 metadata that\n     * describes the properties of upcoming video frames.\n     * @param data {Uint8Array} the bytes of a sequence parameter set\n     * @return {object} an object with configuration parsed from the\n     * sequence parameter set, including the dimensions of the\n     * associated video frames.\n     */\n\n\n    readSequenceParameterSet = function readSequenceParameterSet(data) {\n      var frameCropLeftOffset = 0,\n          frameCropRightOffset = 0,\n          frameCropTopOffset = 0,\n          frameCropBottomOffset = 0,\n          expGolombDecoder,\n          profileIdc,\n          levelIdc,\n          profileCompatibility,\n          chromaFormatIdc,\n          picOrderCntType,\n          numRefFramesInPicOrderCntCycle,\n          picWidthInMbsMinus1,\n          picHeightInMapUnitsMinus1,\n          frameMbsOnlyFlag,\n          scalingListCount,\n          sarRatio = [1, 1],\n          aspectRatioIdc,\n          i;\n      expGolombDecoder = new expGolomb(data);\n      profileIdc = expGolombDecoder.readUnsignedByte(); // profile_idc\n\n      profileCompatibility = expGolombDecoder.readUnsignedByte(); // constraint_set[0-5]_flag\n\n      levelIdc = expGolombDecoder.readUnsignedByte(); // level_idc u(8)\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // seq_parameter_set_id\n      // some profiles have more optional data we don't need\n\n      if (PROFILES_WITH_OPTIONAL_SPS_DATA[profileIdc]) {\n        chromaFormatIdc = expGolombDecoder.readUnsignedExpGolomb();\n\n        if (chromaFormatIdc === 3) {\n          expGolombDecoder.skipBits(1); // separate_colour_plane_flag\n        }\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_luma_minus8\n\n        expGolombDecoder.skipUnsignedExpGolomb(); // bit_depth_chroma_minus8\n\n        expGolombDecoder.skipBits(1); // qpprime_y_zero_transform_bypass_flag\n\n        if (expGolombDecoder.readBoolean()) {\n          // seq_scaling_matrix_present_flag\n          scalingListCount = chromaFormatIdc !== 3 ? 8 : 12;\n\n          for (i = 0; i < scalingListCount; i++) {\n            if (expGolombDecoder.readBoolean()) {\n              // seq_scaling_list_present_flag[ i ]\n              if (i < 6) {\n                skipScalingList(16, expGolombDecoder);\n              } else {\n                skipScalingList(64, expGolombDecoder);\n              }\n            }\n          }\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // log2_max_frame_num_minus4\n\n      picOrderCntType = expGolombDecoder.readUnsignedExpGolomb();\n\n      if (picOrderCntType === 0) {\n        expGolombDecoder.readUnsignedExpGolomb(); // log2_max_pic_order_cnt_lsb_minus4\n      } else if (picOrderCntType === 1) {\n        expGolombDecoder.skipBits(1); // delta_pic_order_always_zero_flag\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_non_ref_pic\n\n        expGolombDecoder.skipExpGolomb(); // offset_for_top_to_bottom_field\n\n        numRefFramesInPicOrderCntCycle = expGolombDecoder.readUnsignedExpGolomb();\n\n        for (i = 0; i < numRefFramesInPicOrderCntCycle; i++) {\n          expGolombDecoder.skipExpGolomb(); // offset_for_ref_frame[ i ]\n        }\n      }\n\n      expGolombDecoder.skipUnsignedExpGolomb(); // max_num_ref_frames\n\n      expGolombDecoder.skipBits(1); // gaps_in_frame_num_value_allowed_flag\n\n      picWidthInMbsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      picHeightInMapUnitsMinus1 = expGolombDecoder.readUnsignedExpGolomb();\n      frameMbsOnlyFlag = expGolombDecoder.readBits(1);\n\n      if (frameMbsOnlyFlag === 0) {\n        expGolombDecoder.skipBits(1); // mb_adaptive_frame_field_flag\n      }\n\n      expGolombDecoder.skipBits(1); // direct_8x8_inference_flag\n\n      if (expGolombDecoder.readBoolean()) {\n        // frame_cropping_flag\n        frameCropLeftOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropRightOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropTopOffset = expGolombDecoder.readUnsignedExpGolomb();\n        frameCropBottomOffset = expGolombDecoder.readUnsignedExpGolomb();\n      }\n\n      if (expGolombDecoder.readBoolean()) {\n        // vui_parameters_present_flag\n        if (expGolombDecoder.readBoolean()) {\n          // aspect_ratio_info_present_flag\n          aspectRatioIdc = expGolombDecoder.readUnsignedByte();\n\n          switch (aspectRatioIdc) {\n            case 1:\n              sarRatio = [1, 1];\n              break;\n\n            case 2:\n              sarRatio = [12, 11];\n              break;\n\n            case 3:\n              sarRatio = [10, 11];\n              break;\n\n            case 4:\n              sarRatio = [16, 11];\n              break;\n\n            case 5:\n              sarRatio = [40, 33];\n              break;\n\n            case 6:\n              sarRatio = [24, 11];\n              break;\n\n            case 7:\n              sarRatio = [20, 11];\n              break;\n\n            case 8:\n              sarRatio = [32, 11];\n              break;\n\n            case 9:\n              sarRatio = [80, 33];\n              break;\n\n            case 10:\n              sarRatio = [18, 11];\n              break;\n\n            case 11:\n              sarRatio = [15, 11];\n              break;\n\n            case 12:\n              sarRatio = [64, 33];\n              break;\n\n            case 13:\n              sarRatio = [160, 99];\n              break;\n\n            case 14:\n              sarRatio = [4, 3];\n              break;\n\n            case 15:\n              sarRatio = [3, 2];\n              break;\n\n            case 16:\n              sarRatio = [2, 1];\n              break;\n\n            case 255:\n              {\n                sarRatio = [expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte(), expGolombDecoder.readUnsignedByte() << 8 | expGolombDecoder.readUnsignedByte()];\n                break;\n              }\n          }\n\n          if (sarRatio) {\n            sarRatio[0] / sarRatio[1];\n          }\n        }\n      }\n\n      return {\n        profileIdc: profileIdc,\n        levelIdc: levelIdc,\n        profileCompatibility: profileCompatibility,\n        width: (picWidthInMbsMinus1 + 1) * 16 - frameCropLeftOffset * 2 - frameCropRightOffset * 2,\n        height: (2 - frameMbsOnlyFlag) * (picHeightInMapUnitsMinus1 + 1) * 16 - frameCropTopOffset * 2 - frameCropBottomOffset * 2,\n        // sar is sample aspect ratio\n        sarRatio: sarRatio\n      };\n    };\n  };\n\n  _H264Stream.prototype = new stream();\n  var h264 = {\n    H264Stream: _H264Stream,\n    NalByteStream: _NalByteStream\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   *\n   * Utilities to detect basic properties and metadata about Aac data.\n   */\n\n  var ADTS_SAMPLING_FREQUENCIES = [96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350];\n\n  var parseId3TagSize = function parseId3TagSize(header, byteIndex) {\n    var returnSize = header[byteIndex + 6] << 21 | header[byteIndex + 7] << 14 | header[byteIndex + 8] << 7 | header[byteIndex + 9],\n        flags = header[byteIndex + 5],\n        footerPresent = (flags & 16) >> 4; // if we get a negative returnSize clamp it to 0\n\n    returnSize = returnSize >= 0 ? returnSize : 0;\n\n    if (footerPresent) {\n      return returnSize + 20;\n    }\n\n    return returnSize + 10;\n  };\n\n  var getId3Offset = function getId3Offset(data, offset) {\n    if (data.length - offset < 10 || data[offset] !== 'I'.charCodeAt(0) || data[offset + 1] !== 'D'.charCodeAt(0) || data[offset + 2] !== '3'.charCodeAt(0)) {\n      return offset;\n    }\n\n    offset += parseId3TagSize(data, offset);\n    return getId3Offset(data, offset);\n  }; // TODO: use vhs-utils\n\n\n  var isLikelyAacData$1 = function isLikelyAacData(data) {\n    var offset = getId3Offset(data, 0);\n    return data.length >= offset + 2 && (data[offset] & 0xFF) === 0xFF && (data[offset + 1] & 0xF0) === 0xF0 && // verify that the 2 layer bits are 0, aka this\n    // is not mp3 data but aac data.\n    (data[offset + 1] & 0x16) === 0x10;\n  };\n\n  var parseSyncSafeInteger = function parseSyncSafeInteger(data) {\n    return data[0] << 21 | data[1] << 14 | data[2] << 7 | data[3];\n  }; // return a percent-encoded representation of the specified byte range\n  // @see http://en.wikipedia.org/wiki/Percent-encoding\n\n\n  var percentEncode = function percentEncode(bytes, start, end) {\n    var i,\n        result = '';\n\n    for (i = start; i < end; i++) {\n      result += '%' + ('00' + bytes[i].toString(16)).slice(-2);\n    }\n\n    return result;\n  }; // return the string representation of the specified byte range,\n  // interpreted as ISO-8859-1.\n\n\n  var parseIso88591 = function parseIso88591(bytes, start, end) {\n    return unescape(percentEncode(bytes, start, end)); // jshint ignore:line\n  };\n\n  var parseAdtsSize = function parseAdtsSize(header, byteIndex) {\n    var lowThree = (header[byteIndex + 5] & 0xE0) >> 5,\n        middle = header[byteIndex + 4] << 3,\n        highTwo = header[byteIndex + 3] & 0x3 << 11;\n    return highTwo | middle | lowThree;\n  };\n\n  var parseType$2 = function parseType(header, byteIndex) {\n    if (header[byteIndex] === 'I'.charCodeAt(0) && header[byteIndex + 1] === 'D'.charCodeAt(0) && header[byteIndex + 2] === '3'.charCodeAt(0)) {\n      return 'timed-metadata';\n    } else if (header[byteIndex] & 0xff === 0xff && (header[byteIndex + 1] & 0xf0) === 0xf0) {\n      return 'audio';\n    }\n\n    return null;\n  };\n\n  var parseSampleRate = function parseSampleRate(packet) {\n    var i = 0;\n\n    while (i + 5 < packet.length) {\n      if (packet[i] !== 0xFF || (packet[i + 1] & 0xF6) !== 0xF0) {\n        // If a valid header was not found,  jump one forward and attempt to\n        // find a valid ADTS header starting at the next byte\n        i++;\n        continue;\n      }\n\n      return ADTS_SAMPLING_FREQUENCIES[(packet[i + 2] & 0x3c) >>> 2];\n    }\n\n    return null;\n  };\n\n  var parseAacTimestamp = function parseAacTimestamp(packet) {\n    var frameStart, frameSize, frame, frameHeader; // find the start of the first frame and the end of the tag\n\n    frameStart = 10;\n\n    if (packet[5] & 0x40) {\n      // advance the frame start past the extended header\n      frameStart += 4; // header size field\n\n      frameStart += parseSyncSafeInteger(packet.subarray(10, 14));\n    } // parse one or more ID3 frames\n    // http://id3.org/id3v2.3.0#ID3v2_frame_overview\n\n\n    do {\n      // determine the number of bytes in this frame\n      frameSize = parseSyncSafeInteger(packet.subarray(frameStart + 4, frameStart + 8));\n\n      if (frameSize < 1) {\n        return null;\n      }\n\n      frameHeader = String.fromCharCode(packet[frameStart], packet[frameStart + 1], packet[frameStart + 2], packet[frameStart + 3]);\n\n      if (frameHeader === 'PRIV') {\n        frame = packet.subarray(frameStart + 10, frameStart + frameSize + 10);\n\n        for (var i = 0; i < frame.byteLength; i++) {\n          if (frame[i] === 0) {\n            var owner = parseIso88591(frame, 0, i);\n\n            if (owner === 'com.apple.streaming.transportStreamTimestamp') {\n              var d = frame.subarray(i + 1);\n              var size = (d[3] & 0x01) << 30 | d[4] << 22 | d[5] << 14 | d[6] << 6 | d[7] >>> 2;\n              size *= 4;\n              size += d[7] & 0x03;\n              return size;\n            }\n\n            break;\n          }\n        }\n      }\n\n      frameStart += 10; // advance past the frame header\n\n      frameStart += frameSize; // advance past the frame body\n    } while (frameStart < packet.byteLength);\n\n    return null;\n  };\n\n  var utils = {\n    isLikelyAacData: isLikelyAacData$1,\n    parseId3TagSize: parseId3TagSize,\n    parseAdtsSize: parseAdtsSize,\n    parseType: parseType$2,\n    parseSampleRate: parseSampleRate,\n    parseAacTimestamp: parseAacTimestamp\n  };\n\n  var _AacStream;\n  /**\n   * Splits an incoming stream of binary data into ADTS and ID3 Frames.\n   */\n\n\n  _AacStream = function AacStream() {\n    var everything = new Uint8Array(),\n        timeStamp = 0;\n\n    _AacStream.prototype.init.call(this);\n\n    this.setTimestamp = function (timestamp) {\n      timeStamp = timestamp;\n    };\n\n    this.push = function (bytes) {\n      var frameSize = 0,\n          byteIndex = 0,\n          bytesLeft,\n          chunk,\n          packet,\n          tempLength; // If there are bytes remaining from the last segment, prepend them to the\n      // bytes that were pushed in\n\n      if (everything.length) {\n        tempLength = everything.length;\n        everything = new Uint8Array(bytes.byteLength + tempLength);\n        everything.set(everything.subarray(0, tempLength));\n        everything.set(bytes, tempLength);\n      } else {\n        everything = bytes;\n      }\n\n      while (everything.length - byteIndex >= 3) {\n        if (everything[byteIndex] === 'I'.charCodeAt(0) && everything[byteIndex + 1] === 'D'.charCodeAt(0) && everything[byteIndex + 2] === '3'.charCodeAt(0)) {\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (everything.length - byteIndex < 10) {\n            break;\n          } // check framesize\n\n\n          frameSize = utils.parseId3TagSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n          // Add to byteIndex to support multiple ID3 tags in sequence\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          chunk = {\n            type: 'timed-metadata',\n            data: everything.subarray(byteIndex, byteIndex + frameSize)\n          };\n          this.trigger('data', chunk);\n          byteIndex += frameSize;\n          continue;\n        } else if ((everything[byteIndex] & 0xff) === 0xff && (everything[byteIndex + 1] & 0xf0) === 0xf0) {\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (everything.length - byteIndex < 7) {\n            break;\n          }\n\n          frameSize = utils.parseAdtsSize(everything, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (byteIndex + frameSize > everything.length) {\n            break;\n          }\n\n          packet = {\n            type: 'audio',\n            data: everything.subarray(byteIndex, byteIndex + frameSize),\n            pts: timeStamp,\n            dts: timeStamp\n          };\n          this.trigger('data', packet);\n          byteIndex += frameSize;\n          continue;\n        }\n\n        byteIndex++;\n      }\n\n      bytesLeft = everything.length - byteIndex;\n\n      if (bytesLeft > 0) {\n        everything = everything.subarray(byteIndex);\n      } else {\n        everything = new Uint8Array();\n      }\n    };\n\n    this.reset = function () {\n      everything = new Uint8Array();\n      this.trigger('reset');\n    };\n\n    this.endTimeline = function () {\n      everything = new Uint8Array();\n      this.trigger('endedtimeline');\n    };\n  };\n\n  _AacStream.prototype = new stream();\n  var aac = _AacStream; // constants\n\n  var AUDIO_PROPERTIES = ['audioobjecttype', 'channelcount', 'samplerate', 'samplingfrequencyindex', 'samplesize'];\n  var audioProperties = AUDIO_PROPERTIES;\n  var VIDEO_PROPERTIES = ['width', 'height', 'profileIdc', 'levelIdc', 'profileCompatibility', 'sarRatio'];\n  var videoProperties = VIDEO_PROPERTIES;\n  var H264Stream = h264.H264Stream;\n  var isLikelyAacData = utils.isLikelyAacData;\n  var ONE_SECOND_IN_TS$1 = clock.ONE_SECOND_IN_TS; // object types\n\n  var _VideoSegmentStream, _AudioSegmentStream, _Transmuxer, _CoalesceStream;\n\n  var retriggerForStream = function retriggerForStream(key, event) {\n    event.stream = key;\n    this.trigger('log', event);\n  };\n\n  var addPipelineLogRetriggers = function addPipelineLogRetriggers(transmuxer, pipeline) {\n    var keys = Object.keys(pipeline);\n\n    for (var i = 0; i < keys.length; i++) {\n      var key = keys[i]; // skip non-stream keys and headOfPipeline\n      // which is just a duplicate\n\n      if (key === 'headOfPipeline' || !pipeline[key].on) {\n        continue;\n      }\n\n      pipeline[key].on('log', retriggerForStream.bind(transmuxer, key));\n    }\n  };\n  /**\n   * Compare two arrays (even typed) for same-ness\n   */\n\n\n  var arrayEquals = function arrayEquals(a, b) {\n    var i;\n\n    if (a.length !== b.length) {\n      return false;\n    } // compare the value of each element in the array\n\n\n    for (i = 0; i < a.length; i++) {\n      if (a[i] !== b[i]) {\n        return false;\n      }\n    }\n\n    return true;\n  };\n\n  var generateSegmentTimingInfo = function generateSegmentTimingInfo(baseMediaDecodeTime, startDts, startPts, endDts, endPts, prependedContentDuration) {\n    var ptsOffsetFromDts = startPts - startDts,\n        decodeDuration = endDts - startDts,\n        presentationDuration = endPts - startPts; // The PTS and DTS values are based on the actual stream times from the segment,\n    // however, the player time values will reflect a start from the baseMediaDecodeTime.\n    // In order to provide relevant values for the player times, base timing info on the\n    // baseMediaDecodeTime and the DTS and PTS durations of the segment.\n\n    return {\n      start: {\n        dts: baseMediaDecodeTime,\n        pts: baseMediaDecodeTime + ptsOffsetFromDts\n      },\n      end: {\n        dts: baseMediaDecodeTime + decodeDuration,\n        pts: baseMediaDecodeTime + presentationDuration\n      },\n      prependedContentDuration: prependedContentDuration,\n      baseMediaDecodeTime: baseMediaDecodeTime\n    };\n  };\n  /**\n   * Constructs a single-track, ISO BMFF media segment from AAC data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n\n  _AudioSegmentStream = function AudioSegmentStream(track, options) {\n    var adtsFrames = [],\n        sequenceNumber,\n        earliestAllowedDts = 0,\n        audioAppendStartTs = 0,\n        videoBaseMediaDecodeTime = Infinity;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _AudioSegmentStream.prototype.init.call(this);\n\n    this.push = function (data) {\n      trackDecodeInfo.collectDtsInfo(track, data);\n\n      if (track) {\n        audioProperties.forEach(function (prop) {\n          track[prop] = data[prop];\n        });\n      } // buffer audio data until end() is called\n\n\n      adtsFrames.push(data);\n    };\n\n    this.setEarliestDts = function (earliestDts) {\n      earliestAllowedDts = earliestDts;\n    };\n\n    this.setVideoBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      videoBaseMediaDecodeTime = baseMediaDecodeTime;\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      audioAppendStartTs = timestamp;\n    };\n\n    this.flush = function () {\n      var frames, moof, mdat, boxes, frameDuration, segmentDuration, videoClockCyclesOfSilencePrefixed; // return early if no audio data has been observed\n\n      if (adtsFrames.length === 0) {\n        this.trigger('done', 'AudioSegmentStream');\n        return;\n      }\n\n      frames = audioFrameUtils.trimAdtsFramesByEarliestDts(adtsFrames, track, earliestAllowedDts);\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps); // amount of audio filled but the value is in video clock rather than audio clock\n\n      videoClockCyclesOfSilencePrefixed = audioFrameUtils.prefixWithSilence(track, frames, audioAppendStartTs, videoBaseMediaDecodeTime); // we have to build the index from byte locations to\n      // samples (that is, adts frames) in the audio data\n\n      track.samples = audioFrameUtils.generateSampleTable(frames); // concatenate the audio data to constuct the mdat\n\n      mdat = mp4Generator.mdat(audioFrameUtils.concatenateFrameData(frames));\n      adtsFrames = [];\n      moof = mp4Generator.moof(sequenceNumber, [track]);\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      trackDecodeInfo.clearDtsInfo(track);\n      frameDuration = Math.ceil(ONE_SECOND_IN_TS$1 * 1024 / track.samplerate); // TODO this check was added to maintain backwards compatibility (particularly with\n      // tests) on adding the timingInfo event. However, it seems unlikely that there's a\n      // valid use-case where an init segment/data should be triggered without associated\n      // frames. Leaving for now, but should be looked into.\n\n      if (frames.length) {\n        segmentDuration = frames.length * frameDuration;\n        this.trigger('segmentTimingInfo', generateSegmentTimingInfo( // The audio track's baseMediaDecodeTime is in audio clock cycles, but the\n        // frame info is in video clock cycles. Convert to match expectation of\n        // listeners (that all timestamps will be based on video clock cycles).\n        clock.audioTsToVideoTs(track.baseMediaDecodeTime, track.samplerate), // frame times are already in video clock, as is segment duration\n        frames[0].dts, frames[0].pts, frames[0].dts + segmentDuration, frames[0].pts + segmentDuration, videoClockCyclesOfSilencePrefixed || 0));\n        this.trigger('timingInfo', {\n          start: frames[0].pts,\n          end: frames[0].pts + segmentDuration\n        });\n      }\n\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.trigger('done', 'AudioSegmentStream');\n    };\n\n    this.reset = function () {\n      trackDecodeInfo.clearDtsInfo(track);\n      adtsFrames = [];\n      this.trigger('reset');\n    };\n  };\n\n  _AudioSegmentStream.prototype = new stream();\n  /**\n   * Constructs a single-track, ISO BMFF media segment from H264 data\n   * events. The output of this stream can be fed to a SourceBuffer\n   * configured with a suitable initialization segment.\n   * @param track {object} track metadata configuration\n   * @param options {object} transmuxer options object\n   * @param options.alignGopsAtEnd {boolean} If true, start from the end of the\n   *        gopsToAlignWith list when attempting to align gop pts\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at 0.\n   */\n\n  _VideoSegmentStream = function VideoSegmentStream(track, options) {\n    var sequenceNumber,\n        nalUnits = [],\n        gopsToAlignWith = [],\n        config,\n        pps;\n    options = options || {};\n    sequenceNumber = options.firstSequenceNumber || 0;\n\n    _VideoSegmentStream.prototype.init.call(this);\n\n    delete track.minPTS;\n    this.gopCache_ = [];\n    /**\n      * Constructs a ISO BMFF segment given H264 nalUnits\n      * @param {Object} nalUnit A data event representing a nalUnit\n      * @param {String} nalUnit.nalUnitType\n      * @param {Object} nalUnit.config Properties for a mp4 track\n      * @param {Uint8Array} nalUnit.data The nalUnit bytes\n      * @see lib/codecs/h264.js\n     **/\n\n    this.push = function (nalUnit) {\n      trackDecodeInfo.collectDtsInfo(track, nalUnit); // record the track config\n\n      if (nalUnit.nalUnitType === 'seq_parameter_set_rbsp' && !config) {\n        config = nalUnit.config;\n        track.sps = [nalUnit.data];\n        videoProperties.forEach(function (prop) {\n          track[prop] = config[prop];\n        }, this);\n      }\n\n      if (nalUnit.nalUnitType === 'pic_parameter_set_rbsp' && !pps) {\n        pps = nalUnit.data;\n        track.pps = [nalUnit.data];\n      } // buffer video until flush() is called\n\n\n      nalUnits.push(nalUnit);\n    };\n    /**\n      * Pass constructed ISO BMFF track and boxes on to the\n      * next stream in the pipeline\n     **/\n\n\n    this.flush = function () {\n      var frames,\n          gopForFusion,\n          gops,\n          moof,\n          mdat,\n          boxes,\n          prependedContentDuration = 0,\n          firstGop,\n          lastGop; // Throw away nalUnits at the start of the byte stream until\n      // we find the first AUD\n\n      while (nalUnits.length) {\n        if (nalUnits[0].nalUnitType === 'access_unit_delimiter_rbsp') {\n          break;\n        }\n\n        nalUnits.shift();\n      } // Return early if no video data has been observed\n\n\n      if (nalUnits.length === 0) {\n        this.resetStream_();\n        this.trigger('done', 'VideoSegmentStream');\n        return;\n      } // Organize the raw nal-units into arrays that represent\n      // higher-level constructs such as frames and gops\n      // (group-of-pictures)\n\n\n      frames = frameUtils.groupNalsIntoFrames(nalUnits);\n      gops = frameUtils.groupFramesIntoGops(frames); // If the first frame of this fragment is not a keyframe we have\n      // a problem since MSE (on Chrome) requires a leading keyframe.\n      //\n      // We have two approaches to repairing this situation:\n      // 1) GOP-FUSION:\n      //    This is where we keep track of the GOPS (group-of-pictures)\n      //    from previous fragments and attempt to find one that we can\n      //    prepend to the current fragment in order to create a valid\n      //    fragment.\n      // 2) KEYFRAME-PULLING:\n      //    Here we search for the first keyframe in the fragment and\n      //    throw away all the frames between the start of the fragment\n      //    and that keyframe. We then extend the duration and pull the\n      //    PTS of the keyframe forward so that it covers the time range\n      //    of the frames that were disposed of.\n      //\n      // #1 is far prefereable over #2 which can cause \"stuttering\" but\n      // requires more things to be just right.\n\n      if (!gops[0][0].keyFrame) {\n        // Search for a gop for fusion from our gopCache\n        gopForFusion = this.getGopForFusion_(nalUnits[0], track);\n\n        if (gopForFusion) {\n          // in order to provide more accurate timing information about the segment, save\n          // the number of seconds prepended to the original segment due to GOP fusion\n          prependedContentDuration = gopForFusion.duration;\n          gops.unshift(gopForFusion); // Adjust Gops' metadata to account for the inclusion of the\n          // new gop at the beginning\n\n          gops.byteLength += gopForFusion.byteLength;\n          gops.nalCount += gopForFusion.nalCount;\n          gops.pts = gopForFusion.pts;\n          gops.dts = gopForFusion.dts;\n          gops.duration += gopForFusion.duration;\n        } else {\n          // If we didn't find a candidate gop fall back to keyframe-pulling\n          gops = frameUtils.extendFirstKeyFrame(gops);\n        }\n      } // Trim gops to align with gopsToAlignWith\n\n\n      if (gopsToAlignWith.length) {\n        var alignedGops;\n\n        if (options.alignGopsAtEnd) {\n          alignedGops = this.alignGopsAtEnd_(gops);\n        } else {\n          alignedGops = this.alignGopsAtStart_(gops);\n        }\n\n        if (!alignedGops) {\n          // save all the nals in the last GOP into the gop cache\n          this.gopCache_.unshift({\n            gop: gops.pop(),\n            pps: track.pps,\n            sps: track.sps\n          }); // Keep a maximum of 6 GOPs in the cache\n\n          this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n          nalUnits = []; // return early no gops can be aligned with desired gopsToAlignWith\n\n          this.resetStream_();\n          this.trigger('done', 'VideoSegmentStream');\n          return;\n        } // Some gops were trimmed. clear dts info so minSegmentDts and pts are correct\n        // when recalculated before sending off to CoalesceStream\n\n\n        trackDecodeInfo.clearDtsInfo(track);\n        gops = alignedGops;\n      }\n\n      trackDecodeInfo.collectDtsInfo(track, gops); // First, we have to build the index from byte locations to\n      // samples (that is, frames) in the video data\n\n      track.samples = frameUtils.generateSampleTable(gops); // Concatenate the video data and construct the mdat\n\n      mdat = mp4Generator.mdat(frameUtils.concatenateNalData(gops));\n      track.baseMediaDecodeTime = trackDecodeInfo.calculateTrackBaseMediaDecodeTime(track, options.keepOriginalTimestamps);\n      this.trigger('processedGopsInfo', gops.map(function (gop) {\n        return {\n          pts: gop.pts,\n          dts: gop.dts,\n          byteLength: gop.byteLength\n        };\n      }));\n      firstGop = gops[0];\n      lastGop = gops[gops.length - 1];\n      this.trigger('segmentTimingInfo', generateSegmentTimingInfo(track.baseMediaDecodeTime, firstGop.dts, firstGop.pts, lastGop.dts + lastGop.duration, lastGop.pts + lastGop.duration, prependedContentDuration));\n      this.trigger('timingInfo', {\n        start: gops[0].pts,\n        end: gops[gops.length - 1].pts + gops[gops.length - 1].duration\n      }); // save all the nals in the last GOP into the gop cache\n\n      this.gopCache_.unshift({\n        gop: gops.pop(),\n        pps: track.pps,\n        sps: track.sps\n      }); // Keep a maximum of 6 GOPs in the cache\n\n      this.gopCache_.length = Math.min(6, this.gopCache_.length); // Clear nalUnits\n\n      nalUnits = [];\n      this.trigger('baseMediaDecodeTime', track.baseMediaDecodeTime);\n      this.trigger('timelineStartInfo', track.timelineStartInfo);\n      moof = mp4Generator.moof(sequenceNumber, [track]); // it would be great to allocate this array up front instead of\n      // throwing away hundreds of media segment fragments\n\n      boxes = new Uint8Array(moof.byteLength + mdat.byteLength); // Bump the sequence number for next time\n\n      sequenceNumber++;\n      boxes.set(moof);\n      boxes.set(mdat, moof.byteLength);\n      this.trigger('data', {\n        track: track,\n        boxes: boxes\n      });\n      this.resetStream_(); // Continue with the flush process now\n\n      this.trigger('done', 'VideoSegmentStream');\n    };\n\n    this.reset = function () {\n      this.resetStream_();\n      nalUnits = [];\n      this.gopCache_.length = 0;\n      gopsToAlignWith.length = 0;\n      this.trigger('reset');\n    };\n\n    this.resetStream_ = function () {\n      trackDecodeInfo.clearDtsInfo(track); // reset config and pps because they may differ across segments\n      // for instance, when we are rendition switching\n\n      config = undefined;\n      pps = undefined;\n    }; // Search for a candidate Gop for gop-fusion from the gop cache and\n    // return it or return null if no good candidate was found\n\n\n    this.getGopForFusion_ = function (nalUnit) {\n      var halfSecond = 45000,\n          // Half-a-second in a 90khz clock\n      allowableOverlap = 10000,\n          // About 3 frames @ 30fps\n      nearestDistance = Infinity,\n          dtsDistance,\n          nearestGopObj,\n          currentGop,\n          currentGopObj,\n          i; // Search for the GOP nearest to the beginning of this nal unit\n\n      for (i = 0; i < this.gopCache_.length; i++) {\n        currentGopObj = this.gopCache_[i];\n        currentGop = currentGopObj.gop; // Reject Gops with different SPS or PPS\n\n        if (!(track.pps && arrayEquals(track.pps[0], currentGopObj.pps[0])) || !(track.sps && arrayEquals(track.sps[0], currentGopObj.sps[0]))) {\n          continue;\n        } // Reject Gops that would require a negative baseMediaDecodeTime\n\n\n        if (currentGop.dts < track.timelineStartInfo.dts) {\n          continue;\n        } // The distance between the end of the gop and the start of the nalUnit\n\n\n        dtsDistance = nalUnit.dts - currentGop.dts - currentGop.duration; // Only consider GOPS that start before the nal unit and end within\n        // a half-second of the nal unit\n\n        if (dtsDistance >= -allowableOverlap && dtsDistance <= halfSecond) {\n          // Always use the closest GOP we found if there is more than\n          // one candidate\n          if (!nearestGopObj || nearestDistance > dtsDistance) {\n            nearestGopObj = currentGopObj;\n            nearestDistance = dtsDistance;\n          }\n        }\n      }\n\n      if (nearestGopObj) {\n        return nearestGopObj.gop;\n      }\n\n      return null;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the START of the list\n\n\n    this.alignGopsAtStart_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, byteLength, nalCount, duration, alignedGops;\n      byteLength = gops.byteLength;\n      nalCount = gops.nalCount;\n      duration = gops.duration;\n      alignIndex = gopIndex = 0;\n\n      while (alignIndex < gopsToAlignWith.length && gopIndex < gops.length) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          break;\n        }\n\n        if (gop.pts > align.pts) {\n          // this current gop starts after the current gop we want to align on, so increment\n          // align index\n          alignIndex++;\n          continue;\n        } // current gop starts before the current gop we want to align on. so increment gop\n        // index\n\n\n        gopIndex++;\n        byteLength -= gop.byteLength;\n        nalCount -= gop.nalCount;\n        duration -= gop.duration;\n      }\n\n      if (gopIndex === 0) {\n        // no gops to trim\n        return gops;\n      }\n\n      if (gopIndex === gops.length) {\n        // all gops trimmed, skip appending all gops\n        return null;\n      }\n\n      alignedGops = gops.slice(gopIndex);\n      alignedGops.byteLength = byteLength;\n      alignedGops.duration = duration;\n      alignedGops.nalCount = nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    }; // trim gop list to the first gop found that has a matching pts with a gop in the list\n    // of gopsToAlignWith starting from the END of the list\n\n\n    this.alignGopsAtEnd_ = function (gops) {\n      var alignIndex, gopIndex, align, gop, alignEndIndex, matchFound;\n      alignIndex = gopsToAlignWith.length - 1;\n      gopIndex = gops.length - 1;\n      alignEndIndex = null;\n      matchFound = false;\n\n      while (alignIndex >= 0 && gopIndex >= 0) {\n        align = gopsToAlignWith[alignIndex];\n        gop = gops[gopIndex];\n\n        if (align.pts === gop.pts) {\n          matchFound = true;\n          break;\n        }\n\n        if (align.pts > gop.pts) {\n          alignIndex--;\n          continue;\n        }\n\n        if (alignIndex === gopsToAlignWith.length - 1) {\n          // gop.pts is greater than the last alignment candidate. If no match is found\n          // by the end of this loop, we still want to append gops that come after this\n          // point\n          alignEndIndex = gopIndex;\n        }\n\n        gopIndex--;\n      }\n\n      if (!matchFound && alignEndIndex === null) {\n        return null;\n      }\n\n      var trimIndex;\n\n      if (matchFound) {\n        trimIndex = gopIndex;\n      } else {\n        trimIndex = alignEndIndex;\n      }\n\n      if (trimIndex === 0) {\n        return gops;\n      }\n\n      var alignedGops = gops.slice(trimIndex);\n      var metadata = alignedGops.reduce(function (total, gop) {\n        total.byteLength += gop.byteLength;\n        total.duration += gop.duration;\n        total.nalCount += gop.nalCount;\n        return total;\n      }, {\n        byteLength: 0,\n        duration: 0,\n        nalCount: 0\n      });\n      alignedGops.byteLength = metadata.byteLength;\n      alignedGops.duration = metadata.duration;\n      alignedGops.nalCount = metadata.nalCount;\n      alignedGops.pts = alignedGops[0].pts;\n      alignedGops.dts = alignedGops[0].dts;\n      return alignedGops;\n    };\n\n    this.alignGopsWith = function (newGopsToAlignWith) {\n      gopsToAlignWith = newGopsToAlignWith;\n    };\n  };\n\n  _VideoSegmentStream.prototype = new stream();\n  /**\n   * A Stream that can combine multiple streams (ie. audio & video)\n   * into a single output segment for MSE. Also supports audio-only\n   * and video-only streams.\n   * @param options {object} transmuxer options object\n   * @param options.keepOriginalTimestamps {boolean} If true, keep the timestamps\n   *        in the source; false to adjust the first segment to start at media timeline start.\n   */\n\n  _CoalesceStream = function CoalesceStream(options, metadataStream) {\n    // Number of Tracks per output segment\n    // If greater than 1, we combine multiple\n    // tracks into a single segment\n    this.numberOfTracks = 0;\n    this.metadataStream = metadataStream;\n    options = options || {};\n\n    if (typeof options.remux !== 'undefined') {\n      this.remuxTracks = !!options.remux;\n    } else {\n      this.remuxTracks = true;\n    }\n\n    if (typeof options.keepOriginalTimestamps === 'boolean') {\n      this.keepOriginalTimestamps = options.keepOriginalTimestamps;\n    } else {\n      this.keepOriginalTimestamps = false;\n    }\n\n    this.pendingTracks = [];\n    this.videoTrack = null;\n    this.pendingBoxes = [];\n    this.pendingCaptions = [];\n    this.pendingMetadata = [];\n    this.pendingBytes = 0;\n    this.emittedTracks = 0;\n\n    _CoalesceStream.prototype.init.call(this); // Take output from multiple\n\n\n    this.push = function (output) {\n      // buffer incoming captions until the associated video segment\n      // finishes\n      if (output.text) {\n        return this.pendingCaptions.push(output);\n      } // buffer incoming id3 tags until the final flush\n\n\n      if (output.frames) {\n        return this.pendingMetadata.push(output);\n      } // Add this track to the list of pending tracks and store\n      // important information required for the construction of\n      // the final segment\n\n\n      this.pendingTracks.push(output.track);\n      this.pendingBytes += output.boxes.byteLength; // TODO: is there an issue for this against chrome?\n      // We unshift audio and push video because\n      // as of Chrome 75 when switching from\n      // one init segment to another if the video\n      // mdat does not appear after the audio mdat\n      // only audio will play for the duration of our transmux.\n\n      if (output.track.type === 'video') {\n        this.videoTrack = output.track;\n        this.pendingBoxes.push(output.boxes);\n      }\n\n      if (output.track.type === 'audio') {\n        this.audioTrack = output.track;\n        this.pendingBoxes.unshift(output.boxes);\n      }\n    };\n  };\n\n  _CoalesceStream.prototype = new stream();\n\n  _CoalesceStream.prototype.flush = function (flushSource) {\n    var offset = 0,\n        event = {\n      captions: [],\n      captionStreams: {},\n      metadata: [],\n      info: {}\n    },\n        caption,\n        id3,\n        initSegment,\n        timelineStartPts = 0,\n        i;\n\n    if (this.pendingTracks.length < this.numberOfTracks) {\n      if (flushSource !== 'VideoSegmentStream' && flushSource !== 'AudioSegmentStream') {\n        // Return because we haven't received a flush from a data-generating\n        // portion of the segment (meaning that we have only recieved meta-data\n        // or captions.)\n        return;\n      } else if (this.remuxTracks) {\n        // Return until we have enough tracks from the pipeline to remux (if we\n        // are remuxing audio and video into a single MP4)\n        return;\n      } else if (this.pendingTracks.length === 0) {\n        // In the case where we receive a flush without any data having been\n        // received we consider it an emitted track for the purposes of coalescing\n        // `done` events.\n        // We do this for the case where there is an audio and video track in the\n        // segment but no audio data. (seen in several playlists with alternate\n        // audio tracks and no audio present in the main TS segments.)\n        this.emittedTracks++;\n\n        if (this.emittedTracks >= this.numberOfTracks) {\n          this.trigger('done');\n          this.emittedTracks = 0;\n        }\n\n        return;\n      }\n    }\n\n    if (this.videoTrack) {\n      timelineStartPts = this.videoTrack.timelineStartInfo.pts;\n      videoProperties.forEach(function (prop) {\n        event.info[prop] = this.videoTrack[prop];\n      }, this);\n    } else if (this.audioTrack) {\n      timelineStartPts = this.audioTrack.timelineStartInfo.pts;\n      audioProperties.forEach(function (prop) {\n        event.info[prop] = this.audioTrack[prop];\n      }, this);\n    }\n\n    if (this.videoTrack || this.audioTrack) {\n      if (this.pendingTracks.length === 1) {\n        event.type = this.pendingTracks[0].type;\n      } else {\n        event.type = 'combined';\n      }\n\n      this.emittedTracks += this.pendingTracks.length;\n      initSegment = mp4Generator.initSegment(this.pendingTracks); // Create a new typed array to hold the init segment\n\n      event.initSegment = new Uint8Array(initSegment.byteLength); // Create an init segment containing a moov\n      // and track definitions\n\n      event.initSegment.set(initSegment); // Create a new typed array to hold the moof+mdats\n\n      event.data = new Uint8Array(this.pendingBytes); // Append each moof+mdat (one per track) together\n\n      for (i = 0; i < this.pendingBoxes.length; i++) {\n        event.data.set(this.pendingBoxes[i], offset);\n        offset += this.pendingBoxes[i].byteLength;\n      } // Translate caption PTS times into second offsets to match the\n      // video timeline for the segment, and add track info\n\n\n      for (i = 0; i < this.pendingCaptions.length; i++) {\n        caption = this.pendingCaptions[i];\n        caption.startTime = clock.metadataTsToSeconds(caption.startPts, timelineStartPts, this.keepOriginalTimestamps);\n        caption.endTime = clock.metadataTsToSeconds(caption.endPts, timelineStartPts, this.keepOriginalTimestamps);\n        event.captionStreams[caption.stream] = true;\n        event.captions.push(caption);\n      } // Translate ID3 frame PTS times into second offsets to match the\n      // video timeline for the segment\n\n\n      for (i = 0; i < this.pendingMetadata.length; i++) {\n        id3 = this.pendingMetadata[i];\n        id3.cueTime = clock.metadataTsToSeconds(id3.pts, timelineStartPts, this.keepOriginalTimestamps);\n        event.metadata.push(id3);\n      } // We add this to every single emitted segment even though we only need\n      // it for the first\n\n\n      event.metadata.dispatchType = this.metadataStream.dispatchType; // Reset stream state\n\n      this.pendingTracks.length = 0;\n      this.videoTrack = null;\n      this.pendingBoxes.length = 0;\n      this.pendingCaptions.length = 0;\n      this.pendingBytes = 0;\n      this.pendingMetadata.length = 0; // Emit the built segment\n      // We include captions and ID3 tags for backwards compatibility,\n      // ideally we should send only video and audio in the data event\n\n      this.trigger('data', event); // Emit each caption to the outside world\n      // Ideally, this would happen immediately on parsing captions,\n      // but we need to ensure that video data is sent back first\n      // so that caption timing can be adjusted to match video timing\n\n      for (i = 0; i < event.captions.length; i++) {\n        caption = event.captions[i];\n        this.trigger('caption', caption);\n      } // Emit each id3 tag to the outside world\n      // Ideally, this would happen immediately on parsing the tag,\n      // but we need to ensure that video data is sent back first\n      // so that ID3 frame timing can be adjusted to match video timing\n\n\n      for (i = 0; i < event.metadata.length; i++) {\n        id3 = event.metadata[i];\n        this.trigger('id3Frame', id3);\n      }\n    } // Only emit `done` if all tracks have been flushed and emitted\n\n\n    if (this.emittedTracks >= this.numberOfTracks) {\n      this.trigger('done');\n      this.emittedTracks = 0;\n    }\n  };\n\n  _CoalesceStream.prototype.setRemux = function (val) {\n    this.remuxTracks = val;\n  };\n  /**\n   * A Stream that expects MP2T binary data as input and produces\n   * corresponding media segments, suitable for use with Media Source\n   * Extension (MSE) implementations that support the ISO BMFF byte\n   * stream format, like Chrome.\n   */\n\n\n  _Transmuxer = function Transmuxer(options) {\n    var self = this,\n        hasFlushed = true,\n        videoTrack,\n        audioTrack;\n\n    _Transmuxer.prototype.init.call(this);\n\n    options = options || {};\n    this.baseMediaDecodeTime = options.baseMediaDecodeTime || 0;\n    this.transmuxPipeline_ = {};\n\n    this.setupAacPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'aac';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.aacStream = new aac();\n      pipeline.audioTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('audio');\n      pipeline.timedMetadataTimestampRolloverStream = new m2ts_1.TimestampRolloverStream('timed-metadata');\n      pipeline.adtsStream = new adts();\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.aacStream;\n      pipeline.aacStream.pipe(pipeline.audioTimestampRolloverStream).pipe(pipeline.adtsStream);\n      pipeline.aacStream.pipe(pipeline.timedMetadataTimestampRolloverStream).pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream);\n      pipeline.metadataStream.on('timestamp', function (frame) {\n        pipeline.aacStream.setTimestamp(frame.timeStamp);\n      });\n      pipeline.aacStream.on('data', function (data) {\n        if (data.type !== 'timed-metadata' && data.type !== 'audio' || pipeline.audioSegmentStream) {\n          return;\n        }\n\n        audioTrack = audioTrack || {\n          timelineStartInfo: {\n            baseMediaDecodeTime: self.baseMediaDecodeTime\n          },\n          codec: 'adts',\n          type: 'audio'\n        }; // hook up the audio segment stream to the first track with aac data\n\n        pipeline.coalesceStream.numberOfTracks++;\n        pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n        pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n        pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo')); // Set up the final part of the audio pipeline\n\n        pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream); // emit pmt info\n\n        self.trigger('trackinfo', {\n          hasAudio: !!audioTrack,\n          hasVideo: !!videoTrack\n        });\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    };\n\n    this.setupTsPipeline = function () {\n      var pipeline = {};\n      this.transmuxPipeline_ = pipeline;\n      pipeline.type = 'ts';\n      pipeline.metadataStream = new m2ts_1.MetadataStream(); // set up the parsing pipeline\n\n      pipeline.packetStream = new m2ts_1.TransportPacketStream();\n      pipeline.parseStream = new m2ts_1.TransportParseStream();\n      pipeline.elementaryStream = new m2ts_1.ElementaryStream();\n      pipeline.timestampRolloverStream = new m2ts_1.TimestampRolloverStream();\n      pipeline.adtsStream = new adts();\n      pipeline.h264Stream = new H264Stream();\n      pipeline.captionStream = new m2ts_1.CaptionStream(options);\n      pipeline.coalesceStream = new _CoalesceStream(options, pipeline.metadataStream);\n      pipeline.headOfPipeline = pipeline.packetStream; // disassemble MPEG2-TS packets into elementary streams\n\n      pipeline.packetStream.pipe(pipeline.parseStream).pipe(pipeline.elementaryStream).pipe(pipeline.timestampRolloverStream); // !!THIS ORDER IS IMPORTANT!!\n      // demux the streams\n\n      pipeline.timestampRolloverStream.pipe(pipeline.h264Stream);\n      pipeline.timestampRolloverStream.pipe(pipeline.adtsStream);\n      pipeline.timestampRolloverStream.pipe(pipeline.metadataStream).pipe(pipeline.coalesceStream); // Hook up CEA-608/708 caption stream\n\n      pipeline.h264Stream.pipe(pipeline.captionStream).pipe(pipeline.coalesceStream);\n      pipeline.elementaryStream.on('data', function (data) {\n        var i;\n\n        if (data.type === 'metadata') {\n          i = data.tracks.length; // scan the tracks listed in the metadata\n\n          while (i--) {\n            if (!videoTrack && data.tracks[i].type === 'video') {\n              videoTrack = data.tracks[i];\n              videoTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            } else if (!audioTrack && data.tracks[i].type === 'audio') {\n              audioTrack = data.tracks[i];\n              audioTrack.timelineStartInfo.baseMediaDecodeTime = self.baseMediaDecodeTime;\n            }\n          } // hook up the video segment stream to the first track with h264 data\n\n\n          if (videoTrack && !pipeline.videoSegmentStream) {\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.videoSegmentStream = new _VideoSegmentStream(videoTrack, options);\n            pipeline.videoSegmentStream.on('log', self.getLogTrigger_('videoSegmentStream'));\n            pipeline.videoSegmentStream.on('timelineStartInfo', function (timelineStartInfo) {\n              // When video emits timelineStartInfo data after a flush, we forward that\n              // info to the AudioSegmentStream, if it exists, because video timeline\n              // data takes precedence.  Do not do this if keepOriginalTimestamps is set,\n              // because this is a particularly subtle form of timestamp alteration.\n              if (audioTrack && !options.keepOriginalTimestamps) {\n                audioTrack.timelineStartInfo = timelineStartInfo; // On the first segment we trim AAC frames that exist before the\n                // very earliest DTS we have seen in video because Chrome will\n                // interpret any video track with a baseMediaDecodeTime that is\n                // non-zero as a gap.\n\n                pipeline.audioSegmentStream.setEarliestDts(timelineStartInfo.dts - self.baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('processedGopsInfo', self.trigger.bind(self, 'gopInfo'));\n            pipeline.videoSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'videoSegmentTimingInfo'));\n            pipeline.videoSegmentStream.on('baseMediaDecodeTime', function (baseMediaDecodeTime) {\n              if (audioTrack) {\n                pipeline.audioSegmentStream.setVideoBaseMediaDecodeTime(baseMediaDecodeTime);\n              }\n            });\n            pipeline.videoSegmentStream.on('timingInfo', self.trigger.bind(self, 'videoTimingInfo')); // Set up the final part of the video pipeline\n\n            pipeline.h264Stream.pipe(pipeline.videoSegmentStream).pipe(pipeline.coalesceStream);\n          }\n\n          if (audioTrack && !pipeline.audioSegmentStream) {\n            // hook up the audio segment stream to the first track with aac data\n            pipeline.coalesceStream.numberOfTracks++;\n            pipeline.audioSegmentStream = new _AudioSegmentStream(audioTrack, options);\n            pipeline.audioSegmentStream.on('log', self.getLogTrigger_('audioSegmentStream'));\n            pipeline.audioSegmentStream.on('timingInfo', self.trigger.bind(self, 'audioTimingInfo'));\n            pipeline.audioSegmentStream.on('segmentTimingInfo', self.trigger.bind(self, 'audioSegmentTimingInfo')); // Set up the final part of the audio pipeline\n\n            pipeline.adtsStream.pipe(pipeline.audioSegmentStream).pipe(pipeline.coalesceStream);\n          } // emit pmt info\n\n\n          self.trigger('trackinfo', {\n            hasAudio: !!audioTrack,\n            hasVideo: !!videoTrack\n          });\n        }\n      }); // Re-emit any data coming from the coalesce stream to the outside world\n\n      pipeline.coalesceStream.on('data', this.trigger.bind(this, 'data'));\n      pipeline.coalesceStream.on('id3Frame', function (id3Frame) {\n        id3Frame.dispatchType = pipeline.metadataStream.dispatchType;\n        self.trigger('id3Frame', id3Frame);\n      });\n      pipeline.coalesceStream.on('caption', this.trigger.bind(this, 'caption')); // Let the consumer know we have finished flushing the entire pipeline\n\n      pipeline.coalesceStream.on('done', this.trigger.bind(this, 'done'));\n      addPipelineLogRetriggers(this, pipeline);\n    }; // hook up the segment streams once track metadata is delivered\n\n\n    this.setBaseMediaDecodeTime = function (baseMediaDecodeTime) {\n      var pipeline = this.transmuxPipeline_;\n\n      if (!options.keepOriginalTimestamps) {\n        this.baseMediaDecodeTime = baseMediaDecodeTime;\n      }\n\n      if (audioTrack) {\n        audioTrack.timelineStartInfo.dts = undefined;\n        audioTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(audioTrack);\n\n        if (pipeline.audioTimestampRolloverStream) {\n          pipeline.audioTimestampRolloverStream.discontinuity();\n        }\n      }\n\n      if (videoTrack) {\n        if (pipeline.videoSegmentStream) {\n          pipeline.videoSegmentStream.gopCache_ = [];\n        }\n\n        videoTrack.timelineStartInfo.dts = undefined;\n        videoTrack.timelineStartInfo.pts = undefined;\n        trackDecodeInfo.clearDtsInfo(videoTrack);\n        pipeline.captionStream.reset();\n      }\n\n      if (pipeline.timestampRolloverStream) {\n        pipeline.timestampRolloverStream.discontinuity();\n      }\n    };\n\n    this.setAudioAppendStart = function (timestamp) {\n      if (audioTrack) {\n        this.transmuxPipeline_.audioSegmentStream.setAudioAppendStart(timestamp);\n      }\n    };\n\n    this.setRemux = function (val) {\n      var pipeline = this.transmuxPipeline_;\n      options.remux = val;\n\n      if (pipeline && pipeline.coalesceStream) {\n        pipeline.coalesceStream.setRemux(val);\n      }\n    };\n\n    this.alignGopsWith = function (gopsToAlignWith) {\n      if (videoTrack && this.transmuxPipeline_.videoSegmentStream) {\n        this.transmuxPipeline_.videoSegmentStream.alignGopsWith(gopsToAlignWith);\n      }\n    };\n\n    this.getLogTrigger_ = function (key) {\n      var self = this;\n      return function (event) {\n        event.stream = key;\n        self.trigger('log', event);\n      };\n    }; // feed incoming data to the front of the parsing pipeline\n\n\n    this.push = function (data) {\n      if (hasFlushed) {\n        var isAac = isLikelyAacData(data);\n\n        if (isAac && this.transmuxPipeline_.type !== 'aac') {\n          this.setupAacPipeline();\n        } else if (!isAac && this.transmuxPipeline_.type !== 'ts') {\n          this.setupTsPipeline();\n        }\n\n        hasFlushed = false;\n      }\n\n      this.transmuxPipeline_.headOfPipeline.push(data);\n    }; // flush any buffered data\n\n\n    this.flush = function () {\n      hasFlushed = true; // Start at the top of the pipeline and flush all pending work\n\n      this.transmuxPipeline_.headOfPipeline.flush();\n    };\n\n    this.endTimeline = function () {\n      this.transmuxPipeline_.headOfPipeline.endTimeline();\n    };\n\n    this.reset = function () {\n      if (this.transmuxPipeline_.headOfPipeline) {\n        this.transmuxPipeline_.headOfPipeline.reset();\n      }\n    }; // Caption data has to be reset when seeking outside buffered range\n\n\n    this.resetCaptions = function () {\n      if (this.transmuxPipeline_.captionStream) {\n        this.transmuxPipeline_.captionStream.reset();\n      }\n    };\n  };\n\n  _Transmuxer.prototype = new stream();\n  var transmuxer = {\n    Transmuxer: _Transmuxer,\n    VideoSegmentStream: _VideoSegmentStream,\n    AudioSegmentStream: _AudioSegmentStream,\n    AUDIO_PROPERTIES: audioProperties,\n    VIDEO_PROPERTIES: videoProperties,\n    // exported for testing\n    generateSegmentTimingInfo: generateSegmentTimingInfo\n  };\n  /**\n   * mux.js\n   *\n   * Copyright (c) Brightcove\n   * Licensed Apache-2.0 https://github.com/videojs/mux.js/blob/master/LICENSE\n   */\n\n  var toUnsigned$3 = function toUnsigned(value) {\n    return value >>> 0;\n  };\n\n  var toHexString$1 = function toHexString(value) {\n    return ('00' + value.toString(16)).slice(-2);\n  };\n\n  var bin = {\n    toUnsigned: toUnsigned$3,\n    toHexString: toHexString$1\n  };\n\n  var parseType$1 = function parseType(buffer) {\n    var result = '';\n    result += String.fromCharCode(buffer[0]);\n    result += String.fromCharCode(buffer[1]);\n    result += String.fromCharCode(buffer[2]);\n    result += String.fromCharCode(buffer[3]);\n    return result;\n  };\n\n  var parseType_1 = parseType$1;\n  var toUnsigned$2 = bin.toUnsigned;\n\n  var findBox = function findBox(data, path) {\n    var results = [],\n        i,\n        size,\n        type,\n        end,\n        subresults;\n\n    if (!path.length) {\n      // short-circuit the search for empty paths\n      return null;\n    }\n\n    for (i = 0; i < data.byteLength;) {\n      size = toUnsigned$2(data[i] << 24 | data[i + 1] << 16 | data[i + 2] << 8 | data[i + 3]);\n      type = parseType_1(data.subarray(i + 4, i + 8));\n      end = size > 1 ? i + size : data.byteLength;\n\n      if (type === path[0]) {\n        if (path.length === 1) {\n          // this is the end of the path and we've found the box we were\n          // looking for\n          results.push(data.subarray(i + 8, end));\n        } else {\n          // recursively search for the next box along the path\n          subresults = findBox(data.subarray(i + 8, end), path.slice(1));\n\n          if (subresults.length) {\n            results = results.concat(subresults);\n          }\n        }\n      }\n\n      i = end;\n    } // we've finished searching all of data\n\n\n    return results;\n  };\n\n  var findBox_1 = findBox;\n  var toUnsigned$1 = bin.toUnsigned;\n  var getUint64$1 = numbers.getUint64;\n\n  var tfdt = function tfdt(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4))\n    };\n\n    if (result.version === 1) {\n      result.baseMediaDecodeTime = getUint64$1(data.subarray(4));\n    } else {\n      result.baseMediaDecodeTime = toUnsigned$1(data[4] << 24 | data[5] << 16 | data[6] << 8 | data[7]);\n    }\n\n    return result;\n  };\n\n  var parseTfdt = tfdt;\n\n  var parseSampleFlags = function parseSampleFlags(flags) {\n    return {\n      isLeading: (flags[0] & 0x0c) >>> 2,\n      dependsOn: flags[0] & 0x03,\n      isDependedOn: (flags[1] & 0xc0) >>> 6,\n      hasRedundancy: (flags[1] & 0x30) >>> 4,\n      paddingValue: (flags[1] & 0x0e) >>> 1,\n      isNonSyncSample: flags[1] & 0x01,\n      degradationPriority: flags[2] << 8 | flags[3]\n    };\n  };\n\n  var parseSampleFlags_1 = parseSampleFlags;\n\n  var trun = function trun(data) {\n    var result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      samples: []\n    },\n        view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        // Flag interpretation\n    dataOffsetPresent = result.flags[2] & 0x01,\n        // compare with 2nd byte of 0x1\n    firstSampleFlagsPresent = result.flags[2] & 0x04,\n        // compare with 2nd byte of 0x4\n    sampleDurationPresent = result.flags[1] & 0x01,\n        // compare with 2nd byte of 0x100\n    sampleSizePresent = result.flags[1] & 0x02,\n        // compare with 2nd byte of 0x200\n    sampleFlagsPresent = result.flags[1] & 0x04,\n        // compare with 2nd byte of 0x400\n    sampleCompositionTimeOffsetPresent = result.flags[1] & 0x08,\n        // compare with 2nd byte of 0x800\n    sampleCount = view.getUint32(4),\n        offset = 8,\n        sample;\n\n    if (dataOffsetPresent) {\n      // 32 bit signed integer\n      result.dataOffset = view.getInt32(offset);\n      offset += 4;\n    } // Overrides the flags for the first sample only. The order of\n    // optional values will be: duration, size, compositionTimeOffset\n\n\n    if (firstSampleFlagsPresent && sampleCount) {\n      sample = {\n        flags: parseSampleFlags_1(data.subarray(offset, offset + 4))\n      };\n      offset += 4;\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n      sampleCount--;\n    }\n\n    while (sampleCount--) {\n      sample = {};\n\n      if (sampleDurationPresent) {\n        sample.duration = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleSizePresent) {\n        sample.size = view.getUint32(offset);\n        offset += 4;\n      }\n\n      if (sampleFlagsPresent) {\n        sample.flags = parseSampleFlags_1(data.subarray(offset, offset + 4));\n        offset += 4;\n      }\n\n      if (sampleCompositionTimeOffsetPresent) {\n        if (result.version === 1) {\n          sample.compositionTimeOffset = view.getInt32(offset);\n        } else {\n          sample.compositionTimeOffset = view.getUint32(offset);\n        }\n\n        offset += 4;\n      }\n\n      result.samples.push(sample);\n    }\n\n    return result;\n  };\n\n  var parseTrun = trun;\n\n  var tfhd = function tfhd(data) {\n    var view = new DataView(data.buffer, data.byteOffset, data.byteLength),\n        result = {\n      version: data[0],\n      flags: new Uint8Array(data.subarray(1, 4)),\n      trackId: view.getUint32(4)\n    },\n        baseDataOffsetPresent = result.flags[2] & 0x01,\n        sampleDescriptionIndexPresent = result.flags[2] & 0x02,\n        defaultSampleDurationPresent = result.flags[2] & 0x08,\n        defaultSampleSizePresent = result.flags[2] & 0x10,\n        defaultSampleFlagsPresent = result.flags[2] & 0x20,\n        durationIsEmpty = result.flags[0] & 0x010000,\n        defaultBaseIsMoof = result.flags[0] & 0x020000,\n        i;\n    i = 8;\n\n    if (baseDataOffsetPresent) {\n      i += 4; // truncate top 4 bytes\n      // FIXME: should we read the full 64 bits?\n\n      result.baseDataOffset = view.getUint32(12);\n      i += 4;\n    }\n\n    if (sampleDescriptionIndexPresent) {\n      result.sampleDescriptionIndex = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleDurationPresent) {\n      result.defaultSampleDuration = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleSizePresent) {\n      result.defaultSampleSize = view.getUint32(i);\n      i += 4;\n    }\n\n    if (defaultSampleFlagsPresent) {\n      result.defaultSampleFlags = view.getUint32(i);\n    }\n\n    if (durationIsEmpty) {\n      result.durationIsEmpty = true;\n    }\n\n    if (!baseDataOffsetPresent && defaultBaseIsMoof) {\n      result.baseDataOffsetIsMoof = true;\n    }\n\n    return result;\n  };\n\n  var parseTfhd = tfhd;\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n  var discardEmulationPreventionBytes = captionPacketParser.discardEmulationPreventionBytes;\n  var CaptionStream = captionStream.CaptionStream;\n  /**\n    * Maps an offset in the mdat to a sample based on the the size of the samples.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Number} offset - The offset into the mdat\n    * @param {Object[]} samples - An array of samples, parsed using `parseSamples`\n    * @return {?Object} The matching sample, or null if no match was found.\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n  var mapToSample = function mapToSample(offset, samples) {\n    var approximateOffset = offset;\n\n    for (var i = 0; i < samples.length; i++) {\n      var sample = samples[i];\n\n      if (approximateOffset < sample.size) {\n        return sample;\n      }\n\n      approximateOffset -= sample.size;\n    }\n\n    return null;\n  };\n  /**\n    * Finds SEI nal units contained in a Media Data Box.\n    * Assumes that `parseSamples` has been called first.\n    *\n    * @param {Uint8Array} avcStream - The bytes of the mdat\n    * @param {Object[]} samples - The samples parsed out by `parseSamples`\n    * @param {Number} trackId - The trackId of this video track\n    * @return {Object[]} seiNals - the parsed SEI NALUs found.\n    *   The contents of the seiNal should match what is expected by\n    *   CaptionStream.push (nalUnitType, size, data, escapedRBSP, pts, dts)\n    *\n    * @see ISO-BMFF-12/2015, Section 8.1.1\n    * @see Rec. ITU-T H.264, 7.3.2.3.1\n   **/\n\n\n  var findSeiNals = function findSeiNals(avcStream, samples, trackId) {\n    var avcView = new DataView(avcStream.buffer, avcStream.byteOffset, avcStream.byteLength),\n        result = {\n      logs: [],\n      seiNals: []\n    },\n        seiNal,\n        i,\n        length,\n        lastMatchedSample;\n\n    for (i = 0; i + 4 < avcStream.length; i += length) {\n      length = avcView.getUint32(i);\n      i += 4; // Bail if this doesn't appear to be an H264 stream\n\n      if (length <= 0) {\n        continue;\n      }\n\n      switch (avcStream[i] & 0x1F) {\n        case 0x06:\n          var data = avcStream.subarray(i + 1, i + 1 + length);\n          var matchingSample = mapToSample(i, samples);\n          seiNal = {\n            nalUnitType: 'sei_rbsp',\n            size: length,\n            data: data,\n            escapedRBSP: discardEmulationPreventionBytes(data),\n            trackId: trackId\n          };\n\n          if (matchingSample) {\n            seiNal.pts = matchingSample.pts;\n            seiNal.dts = matchingSample.dts;\n            lastMatchedSample = matchingSample;\n          } else if (lastMatchedSample) {\n            // If a matching sample cannot be found, use the last\n            // sample's values as they should be as close as possible\n            seiNal.pts = lastMatchedSample.pts;\n            seiNal.dts = lastMatchedSample.dts;\n          } else {\n            result.logs.push({\n              level: 'warn',\n              message: 'We\\'ve encountered a nal unit without data at ' + i + ' for trackId ' + trackId + '. See mux.js#223.'\n            });\n            break;\n          }\n\n          result.seiNals.push(seiNal);\n          break;\n      }\n    }\n\n    return result;\n  };\n  /**\n    * Parses sample information out of Track Run Boxes and calculates\n    * the absolute presentation and decode timestamps of each sample.\n    *\n    * @param {Array<Uint8Array>} truns - The Trun Run boxes to be parsed\n    * @param {Number|BigInt} baseMediaDecodeTime - base media decode time from tfdt\n        @see ISO-BMFF-12/2015, Section 8.8.12\n    * @param {Object} tfhd - The parsed Track Fragment Header\n    *   @see inspect.parseTfhd\n    * @return {Object[]} the parsed samples\n    *\n    * @see ISO-BMFF-12/2015, Section 8.8.8\n   **/\n\n\n  var parseSamples = function parseSamples(truns, baseMediaDecodeTime, tfhd) {\n    var currentDts = baseMediaDecodeTime;\n    var defaultSampleDuration = tfhd.defaultSampleDuration || 0;\n    var defaultSampleSize = tfhd.defaultSampleSize || 0;\n    var trackId = tfhd.trackId;\n    var allSamples = [];\n    truns.forEach(function (trun) {\n      // Note: We currently do not parse the sample table as well\n      // as the trun. It's possible some sources will require this.\n      // moov > trak > mdia > minf > stbl\n      var trackRun = parseTrun(trun);\n      var samples = trackRun.samples;\n      samples.forEach(function (sample) {\n        if (sample.duration === undefined) {\n          sample.duration = defaultSampleDuration;\n        }\n\n        if (sample.size === undefined) {\n          sample.size = defaultSampleSize;\n        }\n\n        sample.trackId = trackId;\n        sample.dts = currentDts;\n\n        if (sample.compositionTimeOffset === undefined) {\n          sample.compositionTimeOffset = 0;\n        }\n\n        if (typeof currentDts === 'bigint') {\n          sample.pts = currentDts + window_1.BigInt(sample.compositionTimeOffset);\n          currentDts += window_1.BigInt(sample.duration);\n        } else {\n          sample.pts = currentDts + sample.compositionTimeOffset;\n          currentDts += sample.duration;\n        }\n      });\n      allSamples = allSamples.concat(samples);\n    });\n    return allSamples;\n  };\n  /**\n    * Parses out caption nals from an FMP4 segment's video tracks.\n    *\n    * @param {Uint8Array} segment - The bytes of a single segment\n    * @param {Number} videoTrackId - The trackId of a video track in the segment\n    * @return {Object.<Number, Object[]>} A mapping of video trackId to\n    *   a list of seiNals found in that track\n   **/\n\n\n  var parseCaptionNals = function parseCaptionNals(segment, videoTrackId) {\n    // To get the samples\n    var trafs = findBox_1(segment, ['moof', 'traf']); // To get SEI NAL units\n\n    var mdats = findBox_1(segment, ['mdat']);\n    var captionNals = {};\n    var mdatTrafPairs = []; // Pair up each traf with a mdat as moofs and mdats are in pairs\n\n    mdats.forEach(function (mdat, index) {\n      var matchingTraf = trafs[index];\n      mdatTrafPairs.push({\n        mdat: mdat,\n        traf: matchingTraf\n      });\n    });\n    mdatTrafPairs.forEach(function (pair) {\n      var mdat = pair.mdat;\n      var traf = pair.traf;\n      var tfhd = findBox_1(traf, ['tfhd']); // Exactly 1 tfhd per traf\n\n      var headerInfo = parseTfhd(tfhd[0]);\n      var trackId = headerInfo.trackId;\n      var tfdt = findBox_1(traf, ['tfdt']); // Either 0 or 1 tfdt per traf\n\n      var baseMediaDecodeTime = tfdt.length > 0 ? parseTfdt(tfdt[0]).baseMediaDecodeTime : 0;\n      var truns = findBox_1(traf, ['trun']);\n      var samples;\n      var result; // Only parse video data for the chosen video track\n\n      if (videoTrackId === trackId && truns.length > 0) {\n        samples = parseSamples(truns, baseMediaDecodeTime, headerInfo);\n        result = findSeiNals(mdat, samples, trackId);\n\n        if (!captionNals[trackId]) {\n          captionNals[trackId] = {\n            seiNals: [],\n            logs: []\n          };\n        }\n\n        captionNals[trackId].seiNals = captionNals[trackId].seiNals.concat(result.seiNals);\n        captionNals[trackId].logs = captionNals[trackId].logs.concat(result.logs);\n      }\n    });\n    return captionNals;\n  };\n  /**\n    * Parses out inband captions from an MP4 container and returns\n    * caption objects that can be used by WebVTT and the TextTrack API.\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/VTTCue\n    * @see https://developer.mozilla.org/en-US/docs/Web/API/TextTrack\n    * Assumes that `probe.getVideoTrackIds` and `probe.timescale` have been called first\n    *\n    * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n    * @param {Number} trackId - The id of the video track to parse\n    * @param {Number} timescale - The timescale for the video track from the init segment\n    *\n    * @return {?Object[]} parsedCaptions - A list of captions or null if no video tracks\n    * @return {Number} parsedCaptions[].startTime - The time to show the caption in seconds\n    * @return {Number} parsedCaptions[].endTime - The time to stop showing the caption in seconds\n    * @return {String} parsedCaptions[].text - The visible content of the caption\n   **/\n\n\n  var parseEmbeddedCaptions = function parseEmbeddedCaptions(segment, trackId, timescale) {\n    var captionNals; // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n\n    if (trackId === null) {\n      return null;\n    }\n\n    captionNals = parseCaptionNals(segment, trackId);\n    var trackNals = captionNals[trackId] || {};\n    return {\n      seiNals: trackNals.seiNals,\n      logs: trackNals.logs,\n      timescale: timescale\n    };\n  };\n  /**\n    * Converts SEI NALUs into captions that can be used by video.js\n   **/\n\n\n  var CaptionParser = function CaptionParser() {\n    var isInitialized = false;\n    var captionStream; // Stores segments seen before trackId and timescale are set\n\n    var segmentCache; // Stores video track ID of the track being parsed\n\n    var trackId; // Stores the timescale of the track being parsed\n\n    var timescale; // Stores captions parsed so far\n\n    var parsedCaptions; // Stores whether we are receiving partial data or not\n\n    var parsingPartial;\n    /**\n      * A method to indicate whether a CaptionParser has been initalized\n      * @returns {Boolean}\n     **/\n\n    this.isInitialized = function () {\n      return isInitialized;\n    };\n    /**\n      * Initializes the underlying CaptionStream, SEI NAL parsing\n      * and management, and caption collection\n     **/\n\n\n    this.init = function (options) {\n      captionStream = new CaptionStream();\n      isInitialized = true;\n      parsingPartial = options ? options.isPartial : false; // Collect dispatched captions\n\n      captionStream.on('data', function (event) {\n        // Convert to seconds in the source's timescale\n        event.startTime = event.startPts / timescale;\n        event.endTime = event.endPts / timescale;\n        parsedCaptions.captions.push(event);\n        parsedCaptions.captionStreams[event.stream] = true;\n      });\n      captionStream.on('log', function (log) {\n        parsedCaptions.logs.push(log);\n      });\n    };\n    /**\n      * Determines if a new video track will be selected\n      * or if the timescale changed\n      * @return {Boolean}\n     **/\n\n\n    this.isNewInit = function (videoTrackIds, timescales) {\n      if (videoTrackIds && videoTrackIds.length === 0 || timescales && typeof timescales === 'object' && Object.keys(timescales).length === 0) {\n        return false;\n      }\n\n      return trackId !== videoTrackIds[0] || timescale !== timescales[trackId];\n    };\n    /**\n      * Parses out SEI captions and interacts with underlying\n      * CaptionStream to return dispatched captions\n      *\n      * @param {Uint8Array} segment - The fmp4 segment containing embedded captions\n      * @param {Number[]} videoTrackIds - A list of video tracks found in the init segment\n      * @param {Object.<Number, Number>} timescales - The timescales found in the init segment\n      * @see parseEmbeddedCaptions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.parse = function (segment, videoTrackIds, timescales) {\n      var parsedData;\n\n      if (!this.isInitialized()) {\n        return null; // This is not likely to be a video segment\n      } else if (!videoTrackIds || !timescales) {\n        return null;\n      } else if (this.isNewInit(videoTrackIds, timescales)) {\n        // Use the first video track only as there is no\n        // mechanism to switch to other video tracks\n        trackId = videoTrackIds[0];\n        timescale = timescales[trackId]; // If an init segment has not been seen yet, hold onto segment\n        // data until we have one.\n        // the ISO-BMFF spec says that trackId can't be zero, but there's some broken content out there\n      } else if (trackId === null || !timescale) {\n        segmentCache.push(segment);\n        return null;\n      } // Now that a timescale and trackId is set, parse cached segments\n\n\n      while (segmentCache.length > 0) {\n        var cachedSegment = segmentCache.shift();\n        this.parse(cachedSegment, videoTrackIds, timescales);\n      }\n\n      parsedData = parseEmbeddedCaptions(segment, trackId, timescale);\n\n      if (parsedData && parsedData.logs) {\n        parsedCaptions.logs = parsedCaptions.logs.concat(parsedData.logs);\n      }\n\n      if (parsedData === null || !parsedData.seiNals) {\n        if (parsedCaptions.logs.length) {\n          return {\n            logs: parsedCaptions.logs,\n            captions: [],\n            captionStreams: []\n          };\n        }\n\n        return null;\n      }\n\n      this.pushNals(parsedData.seiNals); // Force the parsed captions to be dispatched\n\n      this.flushStream();\n      return parsedCaptions;\n    };\n    /**\n      * Pushes SEI NALUs onto CaptionStream\n      * @param {Object[]} nals - A list of SEI nals parsed using `parseCaptionNals`\n      * Assumes that `parseCaptionNals` has been called first\n      * @see m2ts/caption-stream.js\n      **/\n\n\n    this.pushNals = function (nals) {\n      if (!this.isInitialized() || !nals || nals.length === 0) {\n        return null;\n      }\n\n      nals.forEach(function (nal) {\n        captionStream.push(nal);\n      });\n    };\n    /**\n      * Flushes underlying CaptionStream to dispatch processed, displayable captions\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.flushStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      if (!parsingPartial) {\n        captionStream.flush();\n      } else {\n        captionStream.partialFlush();\n      }\n    };\n    /**\n      * Reset caption buckets for new data\n     **/\n\n\n    this.clearParsedCaptions = function () {\n      parsedCaptions.captions = [];\n      parsedCaptions.captionStreams = {};\n      parsedCaptions.logs = [];\n    };\n    /**\n      * Resets underlying CaptionStream\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.resetCaptionStream = function () {\n      if (!this.isInitialized()) {\n        return null;\n      }\n\n      captionStream.reset();\n    };\n    /**\n      * Convenience method to clear all captions flushed from the\n      * CaptionStream and still being parsed\n      * @see m2ts/caption-stream.js\n     **/\n\n\n    this.clearAllCaptions = function () {\n      this.clearParsedCaptions();\n      this.resetCaptionStream();\n    };\n    /**\n      * Reset caption parser\n     **/\n\n\n    this.reset = function () {\n      segmentCache = [];\n      trackId = null;\n      timescale = null;\n\n      if (!parsedCaptions) {\n        parsedCaptions = {\n          captions: [],\n          // CC1, CC2, CC3, CC4\n          captionStreams: {},\n          logs: []\n        };\n      } else {\n        this.clearParsedCaptions();\n      }\n\n      this.resetCaptionStream();\n    };\n\n    this.reset();\n  };\n\n  var captionParser = CaptionParser;\n  var toUnsigned = bin.toUnsigned;\n  var toHexString = bin.toHexString;\n  var getUint64 = numbers.getUint64;\n  var timescale, startTime, compositionStartTime, getVideoTrackIds, getTracks, getTimescaleFromMediaHeader;\n  /**\n   * Parses an MP4 initialization segment and extracts the timescale\n   * values for any declared tracks. Timescale values indicate the\n   * number of clock ticks per second to assume for time-based values\n   * elsewhere in the MP4.\n   *\n   * To determine the start time of an MP4, you need two pieces of\n   * information: the timescale unit and the earliest base media decode\n   * time. Multiple timescales can be specified within an MP4 but the\n   * base media decode time is always expressed in the timescale from\n   * the media header box for the track:\n   * ```\n   * moov > trak > mdia > mdhd.timescale\n   * ```\n   * @param init {Uint8Array} the bytes of the init segment\n   * @return {object} a hash of track ids to timescale values or null if\n   * the init segment is malformed.\n   */\n\n  timescale = function timescale(init) {\n    var result = {},\n        traks = findBox_1(init, ['moov', 'trak']); // mdhd timescale\n\n    return traks.reduce(function (result, trak) {\n      var tkhd, version, index, id, mdhd;\n      tkhd = findBox_1(trak, ['tkhd'])[0];\n\n      if (!tkhd) {\n        return null;\n      }\n\n      version = tkhd[0];\n      index = version === 0 ? 12 : 20;\n      id = toUnsigned(tkhd[index] << 24 | tkhd[index + 1] << 16 | tkhd[index + 2] << 8 | tkhd[index + 3]);\n      mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (!mdhd) {\n        return null;\n      }\n\n      version = mdhd[0];\n      index = version === 0 ? 12 : 20;\n      result[id] = toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n      return result;\n    }, result);\n  };\n  /**\n   * Determine the base media decode start time, in seconds, for an MP4\n   * fragment. If multiple fragments are specified, the earliest time is\n   * returned.\n   *\n   * The base media decode time can be parsed from track fragment\n   * metadata:\n   * ```\n   * moof > traf > tfdt.baseMediaDecodeTime\n   * ```\n   * It requires the timescale value from the mdhd to interpret.\n   *\n   * @param timescale {object} a hash of track ids to timescale values.\n   * @return {number} the earliest base media decode start time for the\n   * fragment, in seconds\n   */\n\n\n  startTime = function startTime(timescale, fragment) {\n    var trafs; // we need info from two childrend of each track fragment box\n\n    trafs = findBox_1(fragment, ['moof', 'traf']); // determine the start times for each track\n\n    var lowestTime = trafs.reduce(function (acc, traf) {\n      var tfhd = findBox_1(traf, ['tfhd'])[0]; // get the track id from the tfhd\n\n      var id = toUnsigned(tfhd[4] << 24 | tfhd[5] << 16 | tfhd[6] << 8 | tfhd[7]); // assume a 90kHz clock if no timescale was specified\n\n      var scale = timescale[id] || 90e3; // get the base media decode time from the tfdt\n\n      var tfdt = findBox_1(traf, ['tfdt'])[0];\n      var dv = new DataView(tfdt.buffer, tfdt.byteOffset, tfdt.byteLength);\n      var baseTime; // version 1 is 64 bit\n\n      if (tfdt[0] === 1) {\n        baseTime = getUint64(tfdt.subarray(4, 12));\n      } else {\n        baseTime = dv.getUint32(4);\n      } // convert base time to seconds if it is a valid number.\n\n\n      var seconds;\n\n      if (typeof baseTime === 'bigint') {\n        seconds = baseTime / window_1.BigInt(scale);\n      } else if (typeof baseTime === 'number' && !isNaN(baseTime)) {\n        seconds = baseTime / scale;\n      }\n\n      if (seconds < Number.MAX_SAFE_INTEGER) {\n        seconds = Number(seconds);\n      }\n\n      if (seconds < acc) {\n        acc = seconds;\n      }\n\n      return acc;\n    }, Infinity);\n    return typeof lowestTime === 'bigint' || isFinite(lowestTime) ? lowestTime : 0;\n  };\n  /**\n   * Determine the composition start, in seconds, for an MP4\n   * fragment.\n   *\n   * The composition start time of a fragment can be calculated using the base\n   * media decode time, composition time offset, and timescale, as follows:\n   *\n   * compositionStartTime = (baseMediaDecodeTime + compositionTimeOffset) / timescale\n   *\n   * All of the aforementioned information is contained within a media fragment's\n   * `traf` box, except for timescale info, which comes from the initialization\n   * segment, so a track id (also contained within a `traf`) is also necessary to\n   * associate it with a timescale\n   *\n   *\n   * @param timescales {object} - a hash of track ids to timescale values.\n   * @param fragment {Unit8Array} - the bytes of a media segment\n   * @return {number} the composition start time for the fragment, in seconds\n   **/\n\n\n  compositionStartTime = function compositionStartTime(timescales, fragment) {\n    var trafBoxes = findBox_1(fragment, ['moof', 'traf']);\n    var baseMediaDecodeTime = 0;\n    var compositionTimeOffset = 0;\n    var trackId;\n\n    if (trafBoxes && trafBoxes.length) {\n      // The spec states that track run samples contained within a `traf` box are contiguous, but\n      // it does not explicitly state whether the `traf` boxes themselves are contiguous.\n      // We will assume that they are, so we only need the first to calculate start time.\n      var tfhd = findBox_1(trafBoxes[0], ['tfhd'])[0];\n      var trun = findBox_1(trafBoxes[0], ['trun'])[0];\n      var tfdt = findBox_1(trafBoxes[0], ['tfdt'])[0];\n\n      if (tfhd) {\n        var parsedTfhd = parseTfhd(tfhd);\n        trackId = parsedTfhd.trackId;\n      }\n\n      if (tfdt) {\n        var parsedTfdt = parseTfdt(tfdt);\n        baseMediaDecodeTime = parsedTfdt.baseMediaDecodeTime;\n      }\n\n      if (trun) {\n        var parsedTrun = parseTrun(trun);\n\n        if (parsedTrun.samples && parsedTrun.samples.length) {\n          compositionTimeOffset = parsedTrun.samples[0].compositionTimeOffset || 0;\n        }\n      }\n    } // Get timescale for this specific track. Assume a 90kHz clock if no timescale was\n    // specified.\n\n\n    var timescale = timescales[trackId] || 90e3; // return the composition start time, in seconds\n\n    if (typeof baseMediaDecodeTime === 'bigint') {\n      compositionTimeOffset = window_1.BigInt(compositionTimeOffset);\n      timescale = window_1.BigInt(timescale);\n    }\n\n    var result = (baseMediaDecodeTime + compositionTimeOffset) / timescale;\n\n    if (typeof result === 'bigint' && result < Number.MAX_SAFE_INTEGER) {\n      result = Number(result);\n    }\n\n    return result;\n  };\n  /**\n    * Find the trackIds of the video tracks in this source.\n    * Found by parsing the Handler Reference and Track Header Boxes:\n    *   moov > trak > mdia > hdlr\n    *   moov > trak > tkhd\n    *\n    * @param {Uint8Array} init - The bytes of the init segment for this source\n    * @return {Number[]} A list of trackIds\n    *\n    * @see ISO-BMFF-12/2015, Section 8.4.3\n   **/\n\n\n  getVideoTrackIds = function getVideoTrackIds(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var videoTrackIds = [];\n    traks.forEach(function (trak) {\n      var hdlrs = findBox_1(trak, ['mdia', 'hdlr']);\n      var tkhds = findBox_1(trak, ['tkhd']);\n      hdlrs.forEach(function (hdlr, index) {\n        var handlerType = parseType_1(hdlr.subarray(8, 12));\n        var tkhd = tkhds[index];\n        var view;\n        var version;\n        var trackId;\n\n        if (handlerType === 'vide') {\n          view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n          version = view.getUint8(0);\n          trackId = version === 0 ? view.getUint32(12) : view.getUint32(20);\n          videoTrackIds.push(trackId);\n        }\n      });\n    });\n    return videoTrackIds;\n  };\n\n  getTimescaleFromMediaHeader = function getTimescaleFromMediaHeader(mdhd) {\n    // mdhd is a FullBox, meaning it will have its own version as the first byte\n    var version = mdhd[0];\n    var index = version === 0 ? 12 : 20;\n    return toUnsigned(mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]);\n  };\n  /**\n   * Get all the video, audio, and hint tracks from a non fragmented\n   * mp4 segment\n   */\n\n\n  getTracks = function getTracks(init) {\n    var traks = findBox_1(init, ['moov', 'trak']);\n    var tracks = [];\n    traks.forEach(function (trak) {\n      var track = {};\n      var tkhd = findBox_1(trak, ['tkhd'])[0];\n      var view, tkhdVersion; // id\n\n      if (tkhd) {\n        view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n        tkhdVersion = view.getUint8(0);\n        track.id = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n      }\n\n      var hdlr = findBox_1(trak, ['mdia', 'hdlr'])[0]; // type\n\n      if (hdlr) {\n        var type = parseType_1(hdlr.subarray(8, 12));\n\n        if (type === 'vide') {\n          track.type = 'video';\n        } else if (type === 'soun') {\n          track.type = 'audio';\n        } else {\n          track.type = type;\n        }\n      } // codec\n\n\n      var stsd = findBox_1(trak, ['mdia', 'minf', 'stbl', 'stsd'])[0];\n\n      if (stsd) {\n        var sampleDescriptions = stsd.subarray(8); // gives the codec type string\n\n        track.codec = parseType_1(sampleDescriptions.subarray(4, 8));\n        var codecBox = findBox_1(sampleDescriptions, [track.codec])[0];\n        var codecConfig, codecConfigType;\n\n        if (codecBox) {\n          // https://tools.ietf.org/html/rfc6381#section-3.3\n          if (/^[asm]vc[1-9]$/i.test(track.codec)) {\n            // we don't need anything but the \"config\" parameter of the\n            // avc1 codecBox\n            codecConfig = codecBox.subarray(78);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'avcC' && codecConfig.length > 11) {\n              track.codec += '.'; // left padded with zeroes for single digit hex\n              // profile idc\n\n              track.codec += toHexString(codecConfig[9]); // the byte containing the constraint_set flags\n\n              track.codec += toHexString(codecConfig[10]); // level idc\n\n              track.codec += toHexString(codecConfig[11]);\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'avc1.4d400d';\n            }\n          } else if (/^mp4[a,v]$/i.test(track.codec)) {\n            // we do not need anything but the streamDescriptor of the mp4a codecBox\n            codecConfig = codecBox.subarray(28);\n            codecConfigType = parseType_1(codecConfig.subarray(4, 8));\n\n            if (codecConfigType === 'esds' && codecConfig.length > 20 && codecConfig[19] !== 0) {\n              track.codec += '.' + toHexString(codecConfig[19]); // this value is only a single digit\n\n              track.codec += '.' + toHexString(codecConfig[20] >>> 2 & 0x3f).replace(/^0/, '');\n            } else {\n              // TODO: show a warning that we couldn't parse the codec\n              // and are using the default\n              track.codec = 'mp4a.40.2';\n            }\n          } else {\n            // flac, opus, etc\n            track.codec = track.codec.toLowerCase();\n          }\n        }\n      }\n\n      var mdhd = findBox_1(trak, ['mdia', 'mdhd'])[0];\n\n      if (mdhd) {\n        track.timescale = getTimescaleFromMediaHeader(mdhd);\n      }\n\n      tracks.push(track);\n    });\n    return tracks;\n  };\n\n  var probe$2 = {\n    // export mp4 inspector's findBox and parseType for backwards compatibility\n    findBox: findBox_1,\n    parseType: parseType_1,\n    timescale: timescale,\n    startTime: startTime,\n    compositionStartTime: compositionStartTime,\n    videoTrackIds: getVideoTrackIds,\n    tracks: getTracks,\n    getTimescaleFromMediaHeader: getTimescaleFromMediaHeader\n  };\n\n  var parsePid = function parsePid(packet) {\n    var pid = packet[1] & 0x1f;\n    pid <<= 8;\n    pid |= packet[2];\n    return pid;\n  };\n\n  var parsePayloadUnitStartIndicator = function parsePayloadUnitStartIndicator(packet) {\n    return !!(packet[1] & 0x40);\n  };\n\n  var parseAdaptionField = function parseAdaptionField(packet) {\n    var offset = 0; // if an adaption field is present, its length is specified by the\n    // fifth byte of the TS packet header. The adaptation field is\n    // used to add stuffing to PES packets that don't fill a complete\n    // TS packet, and to specify some forms of timing and control data\n    // that we do not currently use.\n\n    if ((packet[3] & 0x30) >>> 4 > 0x01) {\n      offset += packet[4] + 1;\n    }\n\n    return offset;\n  };\n\n  var parseType = function parseType(packet, pmtPid) {\n    var pid = parsePid(packet);\n\n    if (pid === 0) {\n      return 'pat';\n    } else if (pid === pmtPid) {\n      return 'pmt';\n    } else if (pmtPid) {\n      return 'pes';\n    }\n\n    return null;\n  };\n\n  var parsePat = function parsePat(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      offset += packet[offset] + 1;\n    }\n\n    return (packet[offset + 10] & 0x1f) << 8 | packet[offset + 11];\n  };\n\n  var parsePmt = function parsePmt(packet) {\n    var programMapTable = {};\n    var pusi = parsePayloadUnitStartIndicator(packet);\n    var payloadOffset = 4 + parseAdaptionField(packet);\n\n    if (pusi) {\n      payloadOffset += packet[payloadOffset] + 1;\n    } // PMTs can be sent ahead of the time when they should actually\n    // take effect. We don't believe this should ever be the case\n    // for HLS but we'll ignore \"forward\" PMT declarations if we see\n    // them. Future PMT declarations have the current_next_indicator\n    // set to zero.\n\n\n    if (!(packet[payloadOffset + 5] & 0x01)) {\n      return;\n    }\n\n    var sectionLength, tableEnd, programInfoLength; // the mapping table ends at the end of the current section\n\n    sectionLength = (packet[payloadOffset + 1] & 0x0f) << 8 | packet[payloadOffset + 2];\n    tableEnd = 3 + sectionLength - 4; // to determine where the table is, we have to figure out how\n    // long the program info descriptors are\n\n    programInfoLength = (packet[payloadOffset + 10] & 0x0f) << 8 | packet[payloadOffset + 11]; // advance the offset to the first entry in the mapping table\n\n    var offset = 12 + programInfoLength;\n\n    while (offset < tableEnd) {\n      var i = payloadOffset + offset; // add an entry that maps the elementary_pid to the stream_type\n\n      programMapTable[(packet[i + 1] & 0x1F) << 8 | packet[i + 2]] = packet[i]; // move to the next table entry\n      // skip past the elementary stream descriptors, if present\n\n      offset += ((packet[i + 3] & 0x0F) << 8 | packet[i + 4]) + 5;\n    }\n\n    return programMapTable;\n  };\n\n  var parsePesType = function parsePesType(packet, programMapTable) {\n    var pid = parsePid(packet);\n    var type = programMapTable[pid];\n\n    switch (type) {\n      case streamTypes.H264_STREAM_TYPE:\n        return 'video';\n\n      case streamTypes.ADTS_STREAM_TYPE:\n        return 'audio';\n\n      case streamTypes.METADATA_STREAM_TYPE:\n        return 'timed-metadata';\n\n      default:\n        return null;\n    }\n  };\n\n  var parsePesTime = function parsePesTime(packet) {\n    var pusi = parsePayloadUnitStartIndicator(packet);\n\n    if (!pusi) {\n      return null;\n    }\n\n    var offset = 4 + parseAdaptionField(packet);\n\n    if (offset >= packet.byteLength) {\n      // From the H 222.0 MPEG-TS spec\n      // \"For transport stream packets carrying PES packets, stuffing is needed when there\n      //  is insufficient PES packet data to completely fill the transport stream packet\n      //  payload bytes. Stuffing is accomplished by defining an adaptation field longer than\n      //  the sum of the lengths of the data elements in it, so that the payload bytes\n      //  remaining after the adaptation field exactly accommodates the available PES packet\n      //  data.\"\n      //\n      // If the offset is >= the length of the packet, then the packet contains no data\n      // and instead is just adaption field stuffing bytes\n      return null;\n    }\n\n    var pes = null;\n    var ptsDtsFlags; // PES packets may be annotated with a PTS value, or a PTS value\n    // and a DTS value. Determine what combination of values is\n    // available to work with.\n\n    ptsDtsFlags = packet[offset + 7]; // PTS and DTS are normally stored as a 33-bit number.  Javascript\n    // performs all bitwise operations on 32-bit integers but javascript\n    // supports a much greater range (52-bits) of integer using standard\n    // mathematical operations.\n    // We construct a 31-bit value using bitwise operators over the 31\n    // most significant bits and then multiply by 4 (equal to a left-shift\n    // of 2) before we add the final 2 least significant bits of the\n    // timestamp (equal to an OR.)\n\n    if (ptsDtsFlags & 0xC0) {\n      pes = {}; // the PTS and DTS are not written out directly. For information\n      // on how they are encoded, see\n      // http://dvd.sourceforge.net/dvdinfo/pes-hdr.html\n\n      pes.pts = (packet[offset + 9] & 0x0E) << 27 | (packet[offset + 10] & 0xFF) << 20 | (packet[offset + 11] & 0xFE) << 12 | (packet[offset + 12] & 0xFF) << 5 | (packet[offset + 13] & 0xFE) >>> 3;\n      pes.pts *= 4; // Left shift by 2\n\n      pes.pts += (packet[offset + 13] & 0x06) >>> 1; // OR by the two LSBs\n\n      pes.dts = pes.pts;\n\n      if (ptsDtsFlags & 0x40) {\n        pes.dts = (packet[offset + 14] & 0x0E) << 27 | (packet[offset + 15] & 0xFF) << 20 | (packet[offset + 16] & 0xFE) << 12 | (packet[offset + 17] & 0xFF) << 5 | (packet[offset + 18] & 0xFE) >>> 3;\n        pes.dts *= 4; // Left shift by 2\n\n        pes.dts += (packet[offset + 18] & 0x06) >>> 1; // OR by the two LSBs\n      }\n    }\n\n    return pes;\n  };\n\n  var parseNalUnitType = function parseNalUnitType(type) {\n    switch (type) {\n      case 0x05:\n        return 'slice_layer_without_partitioning_rbsp_idr';\n\n      case 0x06:\n        return 'sei_rbsp';\n\n      case 0x07:\n        return 'seq_parameter_set_rbsp';\n\n      case 0x08:\n        return 'pic_parameter_set_rbsp';\n\n      case 0x09:\n        return 'access_unit_delimiter_rbsp';\n\n      default:\n        return null;\n    }\n  };\n\n  var videoPacketContainsKeyFrame = function videoPacketContainsKeyFrame(packet) {\n    var offset = 4 + parseAdaptionField(packet);\n    var frameBuffer = packet.subarray(offset);\n    var frameI = 0;\n    var frameSyncPoint = 0;\n    var foundKeyFrame = false;\n    var nalType; // advance the sync point to a NAL start, if necessary\n\n    for (; frameSyncPoint < frameBuffer.byteLength - 3; frameSyncPoint++) {\n      if (frameBuffer[frameSyncPoint + 2] === 1) {\n        // the sync point is properly aligned\n        frameI = frameSyncPoint + 5;\n        break;\n      }\n    }\n\n    while (frameI < frameBuffer.byteLength) {\n      // look at the current byte to determine if we've hit the end of\n      // a NAL unit boundary\n      switch (frameBuffer[frameI]) {\n        case 0:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0) {\n            frameI += 2;\n            break;\n          } else if (frameBuffer[frameI - 2] !== 0) {\n            frameI++;\n            break;\n          }\n\n          if (frameSyncPoint + 3 !== frameI - 2) {\n            nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n            if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n              foundKeyFrame = true;\n            }\n          } // drop trailing zeroes\n\n\n          do {\n            frameI++;\n          } while (frameBuffer[frameI] !== 1 && frameI < frameBuffer.length);\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        case 1:\n          // skip past non-sync sequences\n          if (frameBuffer[frameI - 1] !== 0 || frameBuffer[frameI - 2] !== 0) {\n            frameI += 3;\n            break;\n          }\n\n          nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n          if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n            foundKeyFrame = true;\n          }\n\n          frameSyncPoint = frameI - 2;\n          frameI += 3;\n          break;\n\n        default:\n          // the current byte isn't a one or zero, so it cannot be part\n          // of a sync sequence\n          frameI += 3;\n          break;\n      }\n    }\n\n    frameBuffer = frameBuffer.subarray(frameSyncPoint);\n    frameI -= frameSyncPoint;\n    frameSyncPoint = 0; // parse the final nal\n\n    if (frameBuffer && frameBuffer.byteLength > 3) {\n      nalType = parseNalUnitType(frameBuffer[frameSyncPoint + 3] & 0x1f);\n\n      if (nalType === 'slice_layer_without_partitioning_rbsp_idr') {\n        foundKeyFrame = true;\n      }\n    }\n\n    return foundKeyFrame;\n  };\n\n  var probe$1 = {\n    parseType: parseType,\n    parsePat: parsePat,\n    parsePmt: parsePmt,\n    parsePayloadUnitStartIndicator: parsePayloadUnitStartIndicator,\n    parsePesType: parsePesType,\n    parsePesTime: parsePesTime,\n    videoPacketContainsKeyFrame: videoPacketContainsKeyFrame\n  };\n  var handleRollover = timestampRolloverStream.handleRollover;\n  var probe = {};\n  probe.ts = probe$1;\n  probe.aac = utils;\n  var ONE_SECOND_IN_TS = clock.ONE_SECOND_IN_TS;\n  var MP2T_PACKET_LENGTH = 188,\n      // bytes\n  SYNC_BYTE = 0x47;\n  /**\n   * walks through segment data looking for pat and pmt packets to parse out\n   * program map table information\n   */\n\n  var parsePsi_ = function parsePsi_(bytes, pmt) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type;\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pat':\n            pmt.pid = probe.ts.parsePat(packet);\n            break;\n\n          case 'pmt':\n            var table = probe.ts.parsePmt(packet);\n            pmt.table = pmt.table || {};\n            Object.keys(table).forEach(function (key) {\n              pmt.table[key] = table[key];\n            });\n            break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last audio pes packets\n   */\n\n\n  var parseAudioPes_ = function parseAudioPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed;\n    var endLoop = false; // Start walking from start of segment to get first audio packet\n\n    while (endIndex <= bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last audio packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && (bytes[endIndex] === SYNC_BYTE || endIndex === bytes.byteLength)) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'audio' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'audio';\n                result.audio.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * walks through the segment data from the start and end to get timing information\n   * for the first and last video pes packets as well as timing information for the first\n   * key frame.\n   */\n\n\n  var parseVideoPes_ = function parseVideoPes_(bytes, pmt, result) {\n    var startIndex = 0,\n        endIndex = MP2T_PACKET_LENGTH,\n        packet,\n        type,\n        pesType,\n        pusi,\n        parsed,\n        frame,\n        i,\n        pes;\n    var endLoop = false;\n    var currentFrame = {\n      data: [],\n      size: 0\n    }; // Start walking from start of segment to get first video packet\n\n    while (endIndex < bytes.byteLength) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video') {\n              if (pusi && !endLoop) {\n                parsed = probe.ts.parsePesTime(packet);\n\n                if (parsed) {\n                  parsed.type = 'video';\n                  result.video.push(parsed);\n                  endLoop = true;\n                }\n              }\n\n              if (!result.firstKeyFrame) {\n                if (pusi) {\n                  if (currentFrame.size !== 0) {\n                    frame = new Uint8Array(currentFrame.size);\n                    i = 0;\n\n                    while (currentFrame.data.length) {\n                      pes = currentFrame.data.shift();\n                      frame.set(pes, i);\n                      i += pes.byteLength;\n                    }\n\n                    if (probe.ts.videoPacketContainsKeyFrame(frame)) {\n                      var firstKeyFrame = probe.ts.parsePesTime(frame); // PTS/DTS may not be available. Simply *not* setting\n                      // the keyframe seems to work fine with HLS playback\n                      // and definitely preferable to a crash with TypeError...\n\n                      if (firstKeyFrame) {\n                        result.firstKeyFrame = firstKeyFrame;\n                        result.firstKeyFrame.type = 'video';\n                      } else {\n                        // eslint-disable-next-line\n                        console.warn('Failed to extract PTS/DTS from PES at first keyframe. ' + 'This could be an unusual TS segment, or else mux.js did not ' + 'parse your TS segment correctly. If you know your TS ' + 'segments do contain PTS/DTS on keyframes please file a bug ' + 'report! You can try ffprobe to double check for yourself.');\n                      }\n                    }\n\n                    currentFrame.size = 0;\n                  }\n                }\n\n                currentFrame.data.push(packet);\n                currentFrame.size += packet.byteLength;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop && result.firstKeyFrame) {\n          break;\n        }\n\n        startIndex += MP2T_PACKET_LENGTH;\n        endIndex += MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex++;\n      endIndex++;\n    } // Start walking from end of segment to get last video packet\n\n\n    endIndex = bytes.byteLength;\n    startIndex = endIndex - MP2T_PACKET_LENGTH;\n    endLoop = false;\n\n    while (startIndex >= 0) {\n      // Look for a pair of start and end sync bytes in the data..\n      if (bytes[startIndex] === SYNC_BYTE && bytes[endIndex] === SYNC_BYTE) {\n        // We found a packet\n        packet = bytes.subarray(startIndex, endIndex);\n        type = probe.ts.parseType(packet, pmt.pid);\n\n        switch (type) {\n          case 'pes':\n            pesType = probe.ts.parsePesType(packet, pmt.table);\n            pusi = probe.ts.parsePayloadUnitStartIndicator(packet);\n\n            if (pesType === 'video' && pusi) {\n              parsed = probe.ts.parsePesTime(packet);\n\n              if (parsed) {\n                parsed.type = 'video';\n                result.video.push(parsed);\n                endLoop = true;\n              }\n            }\n\n            break;\n        }\n\n        if (endLoop) {\n          break;\n        }\n\n        startIndex -= MP2T_PACKET_LENGTH;\n        endIndex -= MP2T_PACKET_LENGTH;\n        continue;\n      } // If we get here, we have somehow become de-synchronized and we need to step\n      // forward one byte at a time until we find a pair of sync bytes that denote\n      // a packet\n\n\n      startIndex--;\n      endIndex--;\n    }\n  };\n  /**\n   * Adjusts the timestamp information for the segment to account for\n   * rollover and convert to seconds based on pes packet timescale (90khz clock)\n   */\n\n\n  var adjustTimestamp_ = function adjustTimestamp_(segmentInfo, baseTimestamp) {\n    if (segmentInfo.audio && segmentInfo.audio.length) {\n      var audioBaseTimestamp = baseTimestamp;\n\n      if (typeof audioBaseTimestamp === 'undefined' || isNaN(audioBaseTimestamp)) {\n        audioBaseTimestamp = segmentInfo.audio[0].dts;\n      }\n\n      segmentInfo.audio.forEach(function (info) {\n        info.dts = handleRollover(info.dts, audioBaseTimestamp);\n        info.pts = handleRollover(info.pts, audioBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n    }\n\n    if (segmentInfo.video && segmentInfo.video.length) {\n      var videoBaseTimestamp = baseTimestamp;\n\n      if (typeof videoBaseTimestamp === 'undefined' || isNaN(videoBaseTimestamp)) {\n        videoBaseTimestamp = segmentInfo.video[0].dts;\n      }\n\n      segmentInfo.video.forEach(function (info) {\n        info.dts = handleRollover(info.dts, videoBaseTimestamp);\n        info.pts = handleRollover(info.pts, videoBaseTimestamp); // time in seconds\n\n        info.dtsTime = info.dts / ONE_SECOND_IN_TS;\n        info.ptsTime = info.pts / ONE_SECOND_IN_TS;\n      });\n\n      if (segmentInfo.firstKeyFrame) {\n        var frame = segmentInfo.firstKeyFrame;\n        frame.dts = handleRollover(frame.dts, videoBaseTimestamp);\n        frame.pts = handleRollover(frame.pts, videoBaseTimestamp); // time in seconds\n\n        frame.dtsTime = frame.dts / ONE_SECOND_IN_TS;\n        frame.ptsTime = frame.pts / ONE_SECOND_IN_TS;\n      }\n    }\n  };\n  /**\n   * inspects the aac data stream for start and end time information\n   */\n\n\n  var inspectAac_ = function inspectAac_(bytes) {\n    var endLoop = false,\n        audioCount = 0,\n        sampleRate = null,\n        timestamp = null,\n        frameSize = 0,\n        byteIndex = 0,\n        packet;\n\n    while (bytes.length - byteIndex >= 3) {\n      var type = probe.aac.parseType(bytes, byteIndex);\n\n      switch (type) {\n        case 'timed-metadata':\n          // Exit early because we don't have enough to parse\n          // the ID3 tag header\n          if (bytes.length - byteIndex < 10) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseId3TagSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (timestamp === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            timestamp = probe.aac.parseAacTimestamp(packet);\n          }\n\n          byteIndex += frameSize;\n          break;\n\n        case 'audio':\n          // Exit early because we don't have enough to parse\n          // the ADTS frame header\n          if (bytes.length - byteIndex < 7) {\n            endLoop = true;\n            break;\n          }\n\n          frameSize = probe.aac.parseAdtsSize(bytes, byteIndex); // Exit early if we don't have enough in the buffer\n          // to emit a full packet\n\n          if (frameSize > bytes.length) {\n            endLoop = true;\n            break;\n          }\n\n          if (sampleRate === null) {\n            packet = bytes.subarray(byteIndex, byteIndex + frameSize);\n            sampleRate = probe.aac.parseSampleRate(packet);\n          }\n\n          audioCount++;\n          byteIndex += frameSize;\n          break;\n\n        default:\n          byteIndex++;\n          break;\n      }\n\n      if (endLoop) {\n        return null;\n      }\n    }\n\n    if (sampleRate === null || timestamp === null) {\n      return null;\n    }\n\n    var audioTimescale = ONE_SECOND_IN_TS / sampleRate;\n    var result = {\n      audio: [{\n        type: 'audio',\n        dts: timestamp,\n        pts: timestamp\n      }, {\n        type: 'audio',\n        dts: timestamp + audioCount * 1024 * audioTimescale,\n        pts: timestamp + audioCount * 1024 * audioTimescale\n      }]\n    };\n    return result;\n  };\n  /**\n   * inspects the transport stream segment data for start and end time information\n   * of the audio and video tracks (when present) as well as the first key frame's\n   * start time.\n   */\n\n\n  var inspectTs_ = function inspectTs_(bytes) {\n    var pmt = {\n      pid: null,\n      table: null\n    };\n    var result = {};\n    parsePsi_(bytes, pmt);\n\n    for (var pid in pmt.table) {\n      if (pmt.table.hasOwnProperty(pid)) {\n        var type = pmt.table[pid];\n\n        switch (type) {\n          case streamTypes.H264_STREAM_TYPE:\n            result.video = [];\n            parseVideoPes_(bytes, pmt, result);\n\n            if (result.video.length === 0) {\n              delete result.video;\n            }\n\n            break;\n\n          case streamTypes.ADTS_STREAM_TYPE:\n            result.audio = [];\n            parseAudioPes_(bytes, pmt, result);\n\n            if (result.audio.length === 0) {\n              delete result.audio;\n            }\n\n            break;\n        }\n      }\n    }\n\n    return result;\n  };\n  /**\n   * Inspects segment byte data and returns an object with start and end timing information\n   *\n   * @param {Uint8Array} bytes The segment byte data\n   * @param {Number} baseTimestamp Relative reference timestamp used when adjusting frame\n   *  timestamps for rollover. This value must be in 90khz clock.\n   * @return {Object} Object containing start and end frame timing info of segment.\n   */\n\n\n  var inspect = function inspect(bytes, baseTimestamp) {\n    var isAacData = probe.aac.isLikelyAacData(bytes);\n    var result;\n\n    if (isAacData) {\n      result = inspectAac_(bytes);\n    } else {\n      result = inspectTs_(bytes);\n    }\n\n    if (!result || !result.audio && !result.video) {\n      return null;\n    }\n\n    adjustTimestamp_(result, baseTimestamp);\n    return result;\n  };\n\n  var tsInspector = {\n    inspect: inspect,\n    parseAudioPes_: parseAudioPes_\n  };\n  /* global self */\n\n  /**\n   * Re-emits transmuxer events by converting them into messages to the\n   * world outside the worker.\n   *\n   * @param {Object} transmuxer the transmuxer to wire events on\n   * @private\n   */\n\n  var wireTransmuxerEvents = function wireTransmuxerEvents(self, transmuxer) {\n    transmuxer.on('data', function (segment) {\n      // transfer ownership of the underlying ArrayBuffer\n      // instead of doing a copy to save memory\n      // ArrayBuffers are transferable but generic TypedArrays are not\n      // @link https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#Passing_data_by_transferring_ownership_(transferable_objects)\n      var initArray = segment.initSegment;\n      segment.initSegment = {\n        data: initArray.buffer,\n        byteOffset: initArray.byteOffset,\n        byteLength: initArray.byteLength\n      };\n      var typedArray = segment.data;\n      segment.data = typedArray.buffer;\n      self.postMessage({\n        action: 'data',\n        segment: segment,\n        byteOffset: typedArray.byteOffset,\n        byteLength: typedArray.byteLength\n      }, [segment.data]);\n    });\n    transmuxer.on('done', function (data) {\n      self.postMessage({\n        action: 'done'\n      });\n    });\n    transmuxer.on('gopInfo', function (gopInfo) {\n      self.postMessage({\n        action: 'gopInfo',\n        gopInfo: gopInfo\n      });\n    });\n    transmuxer.on('videoSegmentTimingInfo', function (timingInfo) {\n      var videoSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        videoSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'videoSegmentTimingInfo',\n        videoSegmentTimingInfo: videoSegmentTimingInfo\n      });\n    });\n    transmuxer.on('audioSegmentTimingInfo', function (timingInfo) {\n      // Note that all times for [audio/video]SegmentTimingInfo events are in video clock\n      var audioSegmentTimingInfo = {\n        start: {\n          decode: clock.videoTsToSeconds(timingInfo.start.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.start.pts)\n        },\n        end: {\n          decode: clock.videoTsToSeconds(timingInfo.end.dts),\n          presentation: clock.videoTsToSeconds(timingInfo.end.pts)\n        },\n        baseMediaDecodeTime: clock.videoTsToSeconds(timingInfo.baseMediaDecodeTime)\n      };\n\n      if (timingInfo.prependedContentDuration) {\n        audioSegmentTimingInfo.prependedContentDuration = clock.videoTsToSeconds(timingInfo.prependedContentDuration);\n      }\n\n      self.postMessage({\n        action: 'audioSegmentTimingInfo',\n        audioSegmentTimingInfo: audioSegmentTimingInfo\n      });\n    });\n    transmuxer.on('id3Frame', function (id3Frame) {\n      self.postMessage({\n        action: 'id3Frame',\n        id3Frame: id3Frame\n      });\n    });\n    transmuxer.on('caption', function (caption) {\n      self.postMessage({\n        action: 'caption',\n        caption: caption\n      });\n    });\n    transmuxer.on('trackinfo', function (trackInfo) {\n      self.postMessage({\n        action: 'trackinfo',\n        trackInfo: trackInfo\n      });\n    });\n    transmuxer.on('audioTimingInfo', function (audioTimingInfo) {\n      // convert to video TS since we prioritize video time over audio\n      self.postMessage({\n        action: 'audioTimingInfo',\n        audioTimingInfo: {\n          start: clock.videoTsToSeconds(audioTimingInfo.start),\n          end: clock.videoTsToSeconds(audioTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('videoTimingInfo', function (videoTimingInfo) {\n      self.postMessage({\n        action: 'videoTimingInfo',\n        videoTimingInfo: {\n          start: clock.videoTsToSeconds(videoTimingInfo.start),\n          end: clock.videoTsToSeconds(videoTimingInfo.end)\n        }\n      });\n    });\n    transmuxer.on('log', function (log) {\n      self.postMessage({\n        action: 'log',\n        log: log\n      });\n    });\n  };\n  /**\n   * All incoming messages route through this hash. If no function exists\n   * to handle an incoming message, then we ignore the message.\n   *\n   * @class MessageHandlers\n   * @param {Object} options the options to initialize with\n   */\n\n\n  var MessageHandlers = /*#__PURE__*/function () {\n    function MessageHandlers(self, options) {\n      this.options = options || {};\n      this.self = self;\n      this.init();\n    }\n    /**\n     * initialize our web worker and wire all the events.\n     */\n\n\n    var _proto = MessageHandlers.prototype;\n\n    _proto.init = function init() {\n      if (this.transmuxer) {\n        this.transmuxer.dispose();\n      }\n\n      this.transmuxer = new transmuxer.Transmuxer(this.options);\n      wireTransmuxerEvents(this.self, this.transmuxer);\n    };\n\n    _proto.pushMp4Captions = function pushMp4Captions(data) {\n      if (!this.captionParser) {\n        this.captionParser = new captionParser();\n        this.captionParser.init();\n      }\n\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      var parsed = this.captionParser.parse(segment, data.trackIds, data.timescales);\n      this.self.postMessage({\n        action: 'mp4Captions',\n        captions: parsed && parsed.captions || [],\n        logs: parsed && parsed.logs || [],\n        data: segment.buffer\n      }, [segment.buffer]);\n    };\n\n    _proto.probeMp4StartTime = function probeMp4StartTime(_ref) {\n      var timescales = _ref.timescales,\n          data = _ref.data;\n      var startTime = probe$2.startTime(timescales, data);\n      this.self.postMessage({\n        action: 'probeMp4StartTime',\n        startTime: startTime,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.probeMp4Tracks = function probeMp4Tracks(_ref2) {\n      var data = _ref2.data;\n      var tracks = probe$2.tracks(data);\n      this.self.postMessage({\n        action: 'probeMp4Tracks',\n        tracks: tracks,\n        data: data\n      }, [data.buffer]);\n    }\n    /**\n     * Probe an mpeg2-ts segment to determine the start time of the segment in it's\n     * internal \"media time,\" as well as whether it contains video and/or audio.\n     *\n     * @private\n     * @param {Uint8Array} bytes - segment bytes\n     * @param {number} baseStartTime\n     *        Relative reference timestamp used when adjusting frame timestamps for rollover.\n     *        This value should be in seconds, as it's converted to a 90khz clock within the\n     *        function body.\n     * @return {Object} The start time of the current segment in \"media time\" as well as\n     *                  whether it contains video and/or audio\n     */\n    ;\n\n    _proto.probeTs = function probeTs(_ref3) {\n      var data = _ref3.data,\n          baseStartTime = _ref3.baseStartTime;\n      var tsStartTime = typeof baseStartTime === 'number' && !isNaN(baseStartTime) ? baseStartTime * clock.ONE_SECOND_IN_TS : void 0;\n      var timeInfo = tsInspector.inspect(data, tsStartTime);\n      var result = null;\n\n      if (timeInfo) {\n        result = {\n          // each type's time info comes back as an array of 2 times, start and end\n          hasVideo: timeInfo.video && timeInfo.video.length === 2 || false,\n          hasAudio: timeInfo.audio && timeInfo.audio.length === 2 || false\n        };\n\n        if (result.hasVideo) {\n          result.videoStart = timeInfo.video[0].ptsTime;\n        }\n\n        if (result.hasAudio) {\n          result.audioStart = timeInfo.audio[0].ptsTime;\n        }\n      }\n\n      this.self.postMessage({\n        action: 'probeTs',\n        result: result,\n        data: data\n      }, [data.buffer]);\n    };\n\n    _proto.clearAllMp4Captions = function clearAllMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearAllCaptions();\n      }\n    };\n\n    _proto.clearParsedMp4Captions = function clearParsedMp4Captions() {\n      if (this.captionParser) {\n        this.captionParser.clearParsedCaptions();\n      }\n    }\n    /**\n     * Adds data (a ts segment) to the start of the transmuxer pipeline for\n     * processing.\n     *\n     * @param {ArrayBuffer} data data to push into the muxer\n     */\n    ;\n\n    _proto.push = function push(data) {\n      // Cast array buffer to correct type for transmuxer\n      var segment = new Uint8Array(data.data, data.byteOffset, data.byteLength);\n      this.transmuxer.push(segment);\n    }\n    /**\n     * Recreate the transmuxer so that the next segment added via `push`\n     * start with a fresh transmuxer.\n     */\n    ;\n\n    _proto.reset = function reset() {\n      this.transmuxer.reset();\n    }\n    /**\n     * Set the value that will be used as the `baseMediaDecodeTime` time for the\n     * next segment pushed in. Subsequent segments will have their `baseMediaDecodeTime`\n     * set relative to the first based on the PTS values.\n     *\n     * @param {Object} data used to set the timestamp offset in the muxer\n     */\n    ;\n\n    _proto.setTimestampOffset = function setTimestampOffset(data) {\n      var timestampOffset = data.timestampOffset || 0;\n      this.transmuxer.setBaseMediaDecodeTime(Math.round(clock.secondsToVideoTs(timestampOffset)));\n    };\n\n    _proto.setAudioAppendStart = function setAudioAppendStart(data) {\n      this.transmuxer.setAudioAppendStart(Math.ceil(clock.secondsToVideoTs(data.appendStart)));\n    };\n\n    _proto.setRemux = function setRemux(data) {\n      this.transmuxer.setRemux(data.remux);\n    }\n    /**\n     * Forces the pipeline to finish processing the last segment and emit it's\n     * results.\n     *\n     * @param {Object} data event data, not really used\n     */\n    ;\n\n    _proto.flush = function flush(data) {\n      this.transmuxer.flush(); // transmuxed done action is fired after both audio/video pipelines are flushed\n\n      self.postMessage({\n        action: 'done',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.endTimeline = function endTimeline() {\n      this.transmuxer.endTimeline(); // transmuxed endedtimeline action is fired after both audio/video pipelines end their\n      // timelines\n\n      self.postMessage({\n        action: 'endedtimeline',\n        type: 'transmuxed'\n      });\n    };\n\n    _proto.alignGopsWith = function alignGopsWith(data) {\n      this.transmuxer.alignGopsWith(data.gopsToAlignWith.slice());\n    };\n\n    return MessageHandlers;\n  }();\n  /**\n   * Our web worker interface so that things can talk to mux.js\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   *\n   * @param {Object} self the scope for the web worker\n   */\n\n\n  self.onmessage = function (event) {\n    if (event.data.action === 'init' && event.data.options) {\n      this.messageHandlers = new MessageHandlers(self, event.data.options);\n      return;\n    }\n\n    if (!this.messageHandlers) {\n      this.messageHandlers = new MessageHandlers(self);\n    }\n\n    if (event.data && event.data.action && event.data.action !== 'init') {\n      if (this.messageHandlers[event.data.action]) {\n        this.messageHandlers[event.data.action](event.data);\n      }\n    }\n  };\n}));\nvar TransmuxWorker = factory(workerCode$1);\n/* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/transmuxer-worker.js */\n\nvar handleData_ = function handleData_(event, transmuxedData, callback) {\n  var _event$data$segment = event.data.segment,\n      type = _event$data$segment.type,\n      initSegment = _event$data$segment.initSegment,\n      captions = _event$data$segment.captions,\n      captionStreams = _event$data$segment.captionStreams,\n      metadata = _event$data$segment.metadata,\n      videoFrameDtsTime = _event$data$segment.videoFrameDtsTime,\n      videoFramePtsTime = _event$data$segment.videoFramePtsTime;\n  transmuxedData.buffer.push({\n    captions: captions,\n    captionStreams: captionStreams,\n    metadata: metadata\n  });\n  var boxes = event.data.segment.boxes || {\n    data: event.data.segment.data\n  };\n  var result = {\n    type: type,\n    // cast ArrayBuffer to TypedArray\n    data: new Uint8Array(boxes.data, boxes.data.byteOffset, boxes.data.byteLength),\n    initSegment: new Uint8Array(initSegment.data, initSegment.byteOffset, initSegment.byteLength)\n  };\n\n  if (typeof videoFrameDtsTime !== 'undefined') {\n    result.videoFrameDtsTime = videoFrameDtsTime;\n  }\n\n  if (typeof videoFramePtsTime !== 'undefined') {\n    result.videoFramePtsTime = videoFramePtsTime;\n  }\n\n  callback(result);\n};\n\nvar handleDone_ = function handleDone_(_ref) {\n  var transmuxedData = _ref.transmuxedData,\n      callback = _ref.callback; // Previously we only returned data on data events,\n  // not on done events. Clear out the buffer to keep that consistent.\n\n  transmuxedData.buffer = []; // all buffers should have been flushed from the muxer, so start processing anything we\n  // have received\n\n  callback(transmuxedData);\n};\n\nvar handleGopInfo_ = function handleGopInfo_(event, transmuxedData) {\n  transmuxedData.gopInfo = event.data.gopInfo;\n};\n\nvar processTransmux = function processTransmux(options) {\n  var transmuxer = options.transmuxer,\n      bytes = options.bytes,\n      audioAppendStart = options.audioAppendStart,\n      gopsToAlignWith = options.gopsToAlignWith,\n      remux = options.remux,\n      onData = options.onData,\n      onTrackInfo = options.onTrackInfo,\n      onAudioTimingInfo = options.onAudioTimingInfo,\n      onVideoTimingInfo = options.onVideoTimingInfo,\n      onVideoSegmentTimingInfo = options.onVideoSegmentTimingInfo,\n      onAudioSegmentTimingInfo = options.onAudioSegmentTimingInfo,\n      onId3 = options.onId3,\n      onCaptions = options.onCaptions,\n      onDone = options.onDone,\n      onEndedTimeline = options.onEndedTimeline,\n      onTransmuxerLog = options.onTransmuxerLog,\n      isEndOfTimeline = options.isEndOfTimeline;\n  var transmuxedData = {\n    buffer: []\n  };\n  var waitForEndedTimelineEvent = isEndOfTimeline;\n\n  var handleMessage = function handleMessage(event) {\n    if (transmuxer.currentTransmux !== options) {\n      // disposed\n      return;\n    }\n\n    if (event.data.action === 'data') {\n      handleData_(event, transmuxedData, onData);\n    }\n\n    if (event.data.action === 'trackinfo') {\n      onTrackInfo(event.data.trackInfo);\n    }\n\n    if (event.data.action === 'gopInfo') {\n      handleGopInfo_(event, transmuxedData);\n    }\n\n    if (event.data.action === 'audioTimingInfo') {\n      onAudioTimingInfo(event.data.audioTimingInfo);\n    }\n\n    if (event.data.action === 'videoTimingInfo') {\n      onVideoTimingInfo(event.data.videoTimingInfo);\n    }\n\n    if (event.data.action === 'videoSegmentTimingInfo') {\n      onVideoSegmentTimingInfo(event.data.videoSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'audioSegmentTimingInfo') {\n      onAudioSegmentTimingInfo(event.data.audioSegmentTimingInfo);\n    }\n\n    if (event.data.action === 'id3Frame') {\n      onId3([event.data.id3Frame], event.data.id3Frame.dispatchType);\n    }\n\n    if (event.data.action === 'caption') {\n      onCaptions(event.data.caption);\n    }\n\n    if (event.data.action === 'endedtimeline') {\n      waitForEndedTimelineEvent = false;\n      onEndedTimeline();\n    }\n\n    if (event.data.action === 'log') {\n      onTransmuxerLog(event.data.log);\n    } // wait for the transmuxed event since we may have audio and video\n\n\n    if (event.data.type !== 'transmuxed') {\n      return;\n    } // If the \"endedtimeline\" event has not yet fired, and this segment represents the end\n    // of a timeline, that means there may still be data events before the segment\n    // processing can be considerred complete. In that case, the final event should be\n    // an \"endedtimeline\" event with the type \"transmuxed.\"\n\n\n    if (waitForEndedTimelineEvent) {\n      return;\n    }\n\n    transmuxer.onmessage = null;\n    handleDone_({\n      transmuxedData: transmuxedData,\n      callback: onDone\n    });\n    /* eslint-disable no-use-before-define */\n\n    dequeue(transmuxer);\n    /* eslint-enable */\n  };\n\n  transmuxer.onmessage = handleMessage;\n\n  if (audioAppendStart) {\n    transmuxer.postMessage({\n      action: 'setAudioAppendStart',\n      appendStart: audioAppendStart\n    });\n  } // allow empty arrays to be passed to clear out GOPs\n\n\n  if (Array.isArray(gopsToAlignWith)) {\n    transmuxer.postMessage({\n      action: 'alignGopsWith',\n      gopsToAlignWith: gopsToAlignWith\n    });\n  }\n\n  if (typeof remux !== 'undefined') {\n    transmuxer.postMessage({\n      action: 'setRemux',\n      remux: remux\n    });\n  }\n\n  if (bytes.byteLength) {\n    var buffer = bytes instanceof ArrayBuffer ? bytes : bytes.buffer;\n    var byteOffset = bytes instanceof ArrayBuffer ? 0 : bytes.byteOffset;\n    transmuxer.postMessage({\n      action: 'push',\n      // Send the typed-array of data as an ArrayBuffer so that\n      // it can be sent as a \"Transferable\" and avoid the costly\n      // memory copy\n      data: buffer,\n      // To recreate the original typed-array, we need information\n      // about what portion of the ArrayBuffer it was a view into\n      byteOffset: byteOffset,\n      byteLength: bytes.byteLength\n    }, [buffer]);\n  }\n\n  if (isEndOfTimeline) {\n    transmuxer.postMessage({\n      action: 'endTimeline'\n    });\n  } // even if we didn't push any bytes, we have to make sure we flush in case we reached\n  // the end of the segment\n\n\n  transmuxer.postMessage({\n    action: 'flush'\n  });\n};\n\nvar dequeue = function dequeue(transmuxer) {\n  transmuxer.currentTransmux = null;\n\n  if (transmuxer.transmuxQueue.length) {\n    transmuxer.currentTransmux = transmuxer.transmuxQueue.shift();\n\n    if (typeof transmuxer.currentTransmux === 'function') {\n      transmuxer.currentTransmux();\n    } else {\n      processTransmux(transmuxer.currentTransmux);\n    }\n  }\n};\n\nvar processAction = function processAction(transmuxer, action) {\n  transmuxer.postMessage({\n    action: action\n  });\n  dequeue(transmuxer);\n};\n\nvar enqueueAction = function enqueueAction(action, transmuxer) {\n  if (!transmuxer.currentTransmux) {\n    transmuxer.currentTransmux = action;\n    processAction(transmuxer, action);\n    return;\n  }\n\n  transmuxer.transmuxQueue.push(processAction.bind(null, transmuxer, action));\n};\n\nvar reset = function reset(transmuxer) {\n  enqueueAction('reset', transmuxer);\n};\n\nvar endTimeline = function endTimeline(transmuxer) {\n  enqueueAction('endTimeline', transmuxer);\n};\n\nvar transmux = function transmux(options) {\n  if (!options.transmuxer.currentTransmux) {\n    options.transmuxer.currentTransmux = options;\n    processTransmux(options);\n    return;\n  }\n\n  options.transmuxer.transmuxQueue.push(options);\n};\n\nvar createTransmuxer = function createTransmuxer(options) {\n  var transmuxer = new TransmuxWorker();\n  transmuxer.currentTransmux = null;\n  transmuxer.transmuxQueue = [];\n  var term = transmuxer.terminate;\n\n  transmuxer.terminate = function () {\n    transmuxer.currentTransmux = null;\n    transmuxer.transmuxQueue.length = 0;\n    return term.call(transmuxer);\n  };\n\n  transmuxer.postMessage({\n    action: 'init',\n    options: options\n  });\n  return transmuxer;\n};\n\nvar segmentTransmuxer = {\n  reset: reset,\n  endTimeline: endTimeline,\n  transmux: transmux,\n  createTransmuxer: createTransmuxer\n};\n\nvar workerCallback = function workerCallback(options) {\n  var transmuxer = options.transmuxer;\n  var endAction = options.endAction || options.action;\n  var callback = options.callback;\n\n  var message = _extends({}, options, {\n    endAction: null,\n    transmuxer: null,\n    callback: null\n  });\n\n  var listenForEndEvent = function listenForEndEvent(event) {\n    if (event.data.action !== endAction) {\n      return;\n    }\n\n    transmuxer.removeEventListener('message', listenForEndEvent); // transfer ownership of bytes back to us.\n\n    if (event.data.data) {\n      event.data.data = new Uint8Array(event.data.data, options.byteOffset || 0, options.byteLength || event.data.data.byteLength);\n\n      if (options.data) {\n        options.data = event.data.data;\n      }\n    }\n\n    callback(event.data);\n  };\n\n  transmuxer.addEventListener('message', listenForEndEvent);\n\n  if (options.data) {\n    var isArrayBuffer = options.data instanceof ArrayBuffer;\n    message.byteOffset = isArrayBuffer ? 0 : options.data.byteOffset;\n    message.byteLength = options.data.byteLength;\n    var transfers = [isArrayBuffer ? options.data : options.data.buffer];\n    transmuxer.postMessage(message, transfers);\n  } else {\n    transmuxer.postMessage(message);\n  }\n};\n\nvar REQUEST_ERRORS = {\n  FAILURE: 2,\n  TIMEOUT: -101,\n  ABORTED: -102\n};\n/**\n * Abort all requests\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n */\n\nvar abortAll = function abortAll(activeXhrs) {\n  activeXhrs.forEach(function (xhr) {\n    xhr.abort();\n  });\n};\n/**\n * Gather important bandwidth stats once a request has completed\n *\n * @param {Object} request - the XHR request from which to gather stats\n */\n\n\nvar getRequestStats = function getRequestStats(request) {\n  return {\n    bandwidth: request.bandwidth,\n    bytesReceived: request.bytesReceived || 0,\n    roundTripTime: request.roundTripTime || 0\n  };\n};\n/**\n * If possible gather bandwidth stats as a request is in\n * progress\n *\n * @param {Event} progressEvent - an event object from an XHR's progress event\n */\n\n\nvar getProgressStats = function getProgressStats(progressEvent) {\n  var request = progressEvent.target;\n  var roundTripTime = Date.now() - request.requestTime;\n  var stats = {\n    bandwidth: Infinity,\n    bytesReceived: 0,\n    roundTripTime: roundTripTime || 0\n  };\n  stats.bytesReceived = progressEvent.loaded; // This can result in Infinity if stats.roundTripTime is 0 but that is ok\n  // because we should only use bandwidth stats on progress to determine when\n  // abort a request early due to insufficient bandwidth\n\n  stats.bandwidth = Math.floor(stats.bytesReceived / stats.roundTripTime * 8 * 1000);\n  return stats;\n};\n/**\n * Handle all error conditions in one place and return an object\n * with all the information\n *\n * @param {Error|null} error - if non-null signals an error occured with the XHR\n * @param {Object} request -  the XHR request that possibly generated the error\n */\n\n\nvar handleErrors = function handleErrors(error, request) {\n  if (request.timedout) {\n    return {\n      status: request.status,\n      message: 'HLS request timed-out at URL: ' + request.uri,\n      code: REQUEST_ERRORS.TIMEOUT,\n      xhr: request\n    };\n  }\n\n  if (request.aborted) {\n    return {\n      status: request.status,\n      message: 'HLS request aborted at URL: ' + request.uri,\n      code: REQUEST_ERRORS.ABORTED,\n      xhr: request\n    };\n  }\n\n  if (error) {\n    return {\n      status: request.status,\n      message: 'HLS request errored at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  if (request.responseType === 'arraybuffer' && request.response.byteLength === 0) {\n    return {\n      status: request.status,\n      message: 'Empty HLS response at URL: ' + request.uri,\n      code: REQUEST_ERRORS.FAILURE,\n      xhr: request\n    };\n  }\n\n  return null;\n};\n/**\n * Handle responses for key data and convert the key data to the correct format\n * for the decryption step later\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Array} objects - objects to add the key bytes to.\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleKeyResponse = function handleKeyResponse(segment, objects, finishProcessingFn) {\n  return function (error, request) {\n    var response = request.response;\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    if (response.byteLength !== 16) {\n      return finishProcessingFn({\n        status: request.status,\n        message: 'Invalid HLS key at URL: ' + request.uri,\n        code: REQUEST_ERRORS.FAILURE,\n        xhr: request\n      }, segment);\n    }\n\n    var view = new DataView(response);\n    var bytes = new Uint32Array([view.getUint32(0), view.getUint32(4), view.getUint32(8), view.getUint32(12)]);\n\n    for (var i = 0; i < objects.length; i++) {\n      objects[i].bytes = bytes;\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar parseInitSegment = function parseInitSegment(segment, _callback) {\n  var type = detectContainerForBytes(segment.map.bytes); // TODO: We should also handle ts init segments here, but we\n  // only know how to parse mp4 init segments at the moment\n\n  if (type !== 'mp4') {\n    var uri = segment.map.resolvedUri || segment.map.uri;\n    return _callback({\n      internal: true,\n      message: \"Found unsupported \" + (type || 'unknown') + \" container for initialization segment at URL: \" + uri,\n      code: REQUEST_ERRORS.FAILURE\n    });\n  }\n\n  workerCallback({\n    action: 'probeMp4Tracks',\n    data: segment.map.bytes,\n    transmuxer: segment.transmuxer,\n    callback: function callback(_ref) {\n      var tracks = _ref.tracks,\n          data = _ref.data; // transfer bytes back to us\n\n      segment.map.bytes = data;\n      tracks.forEach(function (track) {\n        segment.map.tracks = segment.map.tracks || {}; // only support one track of each type for now\n\n        if (segment.map.tracks[track.type]) {\n          return;\n        }\n\n        segment.map.tracks[track.type] = track;\n\n        if (typeof track.id === 'number' && track.timescale) {\n          segment.map.timescales = segment.map.timescales || {};\n          segment.map.timescales[track.id] = track.timescale;\n        }\n      });\n      return _callback(null);\n    }\n  });\n};\n/**\n * Handle init-segment responses\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleInitSegmentResponse = function handleInitSegmentResponse(_ref2) {\n  var segment = _ref2.segment,\n      finishProcessingFn = _ref2.finishProcessingFn;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var bytes = new Uint8Array(request.response); // init segment is encypted, we will have to wait\n    // until the key request is done to decrypt.\n\n    if (segment.map.key) {\n      segment.map.encryptedBytes = bytes;\n      return finishProcessingFn(null, segment);\n    }\n\n    segment.map.bytes = bytes;\n    parseInitSegment(segment, function (parseError) {\n      if (parseError) {\n        parseError.xhr = request;\n        parseError.status = request.status;\n        return finishProcessingFn(parseError, segment);\n      }\n\n      finishProcessingFn(null, segment);\n    });\n  };\n};\n/**\n * Response handler for segment-requests being sure to set the correct\n * property depending on whether the segment is encryped or not\n * Also records and keeps track of stats that are used for ABR purposes\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} finishProcessingFn - a callback to execute to continue processing\n *                                        this request\n */\n\n\nvar handleSegmentResponse = function handleSegmentResponse(_ref3) {\n  var segment = _ref3.segment,\n      finishProcessingFn = _ref3.finishProcessingFn,\n      responseType = _ref3.responseType;\n  return function (error, request) {\n    var errorObj = handleErrors(error, request);\n\n    if (errorObj) {\n      return finishProcessingFn(errorObj, segment);\n    }\n\n    var newBytes = // although responseText \"should\" exist, this guard serves to prevent an error being\n    // thrown for two primary cases:\n    // 1. the mime type override stops working, or is not implemented for a specific\n    //    browser\n    // 2. when using mock XHR libraries like sinon that do not allow the override behavior\n    responseType === 'arraybuffer' || !request.responseText ? request.response : stringToArrayBuffer(request.responseText.substring(segment.lastReachedChar || 0));\n    segment.stats = getRequestStats(request);\n\n    if (segment.key) {\n      segment.encryptedBytes = new Uint8Array(newBytes);\n    } else {\n      segment.bytes = new Uint8Array(newBytes);\n    }\n\n    return finishProcessingFn(null, segment);\n  };\n};\n\nvar transmuxAndNotify = function transmuxAndNotify(_ref4) {\n  var segment = _ref4.segment,\n      bytes = _ref4.bytes,\n      trackInfoFn = _ref4.trackInfoFn,\n      timingInfoFn = _ref4.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref4.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref4.audioSegmentTimingInfoFn,\n      id3Fn = _ref4.id3Fn,\n      captionsFn = _ref4.captionsFn,\n      isEndOfTimeline = _ref4.isEndOfTimeline,\n      endedTimelineFn = _ref4.endedTimelineFn,\n      dataFn = _ref4.dataFn,\n      doneFn = _ref4.doneFn,\n      onTransmuxerLog = _ref4.onTransmuxerLog;\n  var fmp4Tracks = segment.map && segment.map.tracks || {};\n  var isMuxed = Boolean(fmp4Tracks.audio && fmp4Tracks.video); // Keep references to each function so we can null them out after we're done with them.\n  // One reason for this is that in the case of full segments, we want to trust start\n  // times from the probe, rather than the transmuxer.\n\n  var audioStartFn = timingInfoFn.bind(null, segment, 'audio', 'start');\n  var audioEndFn = timingInfoFn.bind(null, segment, 'audio', 'end');\n  var videoStartFn = timingInfoFn.bind(null, segment, 'video', 'start');\n  var videoEndFn = timingInfoFn.bind(null, segment, 'video', 'end');\n\n  var finish = function finish() {\n    return transmux({\n      bytes: bytes,\n      transmuxer: segment.transmuxer,\n      audioAppendStart: segment.audioAppendStart,\n      gopsToAlignWith: segment.gopsToAlignWith,\n      remux: isMuxed,\n      onData: function onData(result) {\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        dataFn(segment, result);\n      },\n      onTrackInfo: function onTrackInfo(trackInfo) {\n        if (trackInfoFn) {\n          if (isMuxed) {\n            trackInfo.isMuxed = true;\n          }\n\n          trackInfoFn(segment, trackInfo);\n        }\n      },\n      onAudioTimingInfo: function onAudioTimingInfo(audioTimingInfo) {\n        // we only want the first start value we encounter\n        if (audioStartFn && typeof audioTimingInfo.start !== 'undefined') {\n          audioStartFn(audioTimingInfo.start);\n          audioStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (audioEndFn && typeof audioTimingInfo.end !== 'undefined') {\n          audioEndFn(audioTimingInfo.end);\n        }\n      },\n      onVideoTimingInfo: function onVideoTimingInfo(videoTimingInfo) {\n        // we only want the first start value we encounter\n        if (videoStartFn && typeof videoTimingInfo.start !== 'undefined') {\n          videoStartFn(videoTimingInfo.start);\n          videoStartFn = null;\n        } // we want to continually update the end time\n\n\n        if (videoEndFn && typeof videoTimingInfo.end !== 'undefined') {\n          videoEndFn(videoTimingInfo.end);\n        }\n      },\n      onVideoSegmentTimingInfo: function onVideoSegmentTimingInfo(videoSegmentTimingInfo) {\n        videoSegmentTimingInfoFn(videoSegmentTimingInfo);\n      },\n      onAudioSegmentTimingInfo: function onAudioSegmentTimingInfo(audioSegmentTimingInfo) {\n        audioSegmentTimingInfoFn(audioSegmentTimingInfo);\n      },\n      onId3: function onId3(id3Frames, dispatchType) {\n        id3Fn(segment, id3Frames, dispatchType);\n      },\n      onCaptions: function onCaptions(captions) {\n        captionsFn(segment, [captions]);\n      },\n      isEndOfTimeline: isEndOfTimeline,\n      onEndedTimeline: function onEndedTimeline() {\n        endedTimelineFn();\n      },\n      onTransmuxerLog: onTransmuxerLog,\n      onDone: function onDone(result) {\n        if (!doneFn) {\n          return;\n        }\n\n        result.type = result.type === 'combined' ? 'video' : result.type;\n        doneFn(null, segment, result);\n      }\n    });\n  }; // In the transmuxer, we don't yet have the ability to extract a \"proper\" start time.\n  // Meaning cached frame data may corrupt our notion of where this segment\n  // really starts. To get around this, probe for the info needed.\n\n\n  workerCallback({\n    action: 'probeTs',\n    transmuxer: segment.transmuxer,\n    data: bytes,\n    baseStartTime: segment.baseStartTime,\n    callback: function callback(data) {\n      segment.bytes = bytes = data.data;\n      var probeResult = data.result;\n\n      if (probeResult) {\n        trackInfoFn(segment, {\n          hasAudio: probeResult.hasAudio,\n          hasVideo: probeResult.hasVideo,\n          isMuxed: isMuxed\n        });\n        trackInfoFn = null;\n\n        if (probeResult.hasAudio && !isMuxed) {\n          audioStartFn(probeResult.audioStart);\n        }\n\n        if (probeResult.hasVideo) {\n          videoStartFn(probeResult.videoStart);\n        }\n\n        audioStartFn = null;\n        videoStartFn = null;\n      }\n\n      finish();\n    }\n  });\n};\n\nvar handleSegmentBytes = function handleSegmentBytes(_ref5) {\n  var segment = _ref5.segment,\n      bytes = _ref5.bytes,\n      trackInfoFn = _ref5.trackInfoFn,\n      timingInfoFn = _ref5.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref5.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref5.audioSegmentTimingInfoFn,\n      id3Fn = _ref5.id3Fn,\n      captionsFn = _ref5.captionsFn,\n      isEndOfTimeline = _ref5.isEndOfTimeline,\n      endedTimelineFn = _ref5.endedTimelineFn,\n      dataFn = _ref5.dataFn,\n      doneFn = _ref5.doneFn,\n      onTransmuxerLog = _ref5.onTransmuxerLog;\n  var bytesAsUint8Array = new Uint8Array(bytes); // TODO:\n  // We should have a handler that fetches the number of bytes required\n  // to check if something is fmp4. This will allow us to save bandwidth\n  // because we can only blacklist a playlist and abort requests\n  // by codec after trackinfo triggers.\n\n  if (isLikelyFmp4MediaSegment(bytesAsUint8Array)) {\n    segment.isFmp4 = true;\n    var tracks = segment.map.tracks;\n    var trackInfo = {\n      isFmp4: true,\n      hasVideo: !!tracks.video,\n      hasAudio: !!tracks.audio\n    }; // if we have a audio track, with a codec that is not set to\n    // encrypted audio\n\n    if (tracks.audio && tracks.audio.codec && tracks.audio.codec !== 'enca') {\n      trackInfo.audioCodec = tracks.audio.codec;\n    } // if we have a video track, with a codec that is not set to\n    // encrypted video\n\n\n    if (tracks.video && tracks.video.codec && tracks.video.codec !== 'encv') {\n      trackInfo.videoCodec = tracks.video.codec;\n    }\n\n    if (tracks.video && tracks.audio) {\n      trackInfo.isMuxed = true;\n    } // since we don't support appending fmp4 data on progress, we know we have the full\n    // segment here\n\n\n    trackInfoFn(segment, trackInfo); // The probe doesn't provide the segment end time, so only callback with the start\n    // time. The end time can be roughly calculated by the receiver using the duration.\n    //\n    // Note that the start time returned by the probe reflects the baseMediaDecodeTime, as\n    // that is the true start of the segment (where the playback engine should begin\n    // decoding).\n\n    var finishLoading = function finishLoading(captions) {\n      // if the track still has audio at this point it is only possible\n      // for it to be audio only. See `tracks.video && tracks.audio` if statement\n      // above.\n      // we make sure to use segment.bytes here as that\n      dataFn(segment, {\n        data: bytesAsUint8Array,\n        type: trackInfo.hasAudio && !trackInfo.isMuxed ? 'audio' : 'video'\n      });\n\n      if (captions && captions.length) {\n        captionsFn(segment, captions);\n      }\n\n      doneFn(null, segment, {});\n    };\n\n    workerCallback({\n      action: 'probeMp4StartTime',\n      timescales: segment.map.timescales,\n      data: bytesAsUint8Array,\n      transmuxer: segment.transmuxer,\n      callback: function callback(_ref6) {\n        var data = _ref6.data,\n            startTime = _ref6.startTime; // transfer bytes back to us\n\n        bytes = data.buffer;\n        segment.bytes = bytesAsUint8Array = data;\n\n        if (trackInfo.hasAudio && !trackInfo.isMuxed) {\n          timingInfoFn(segment, 'audio', 'start', startTime);\n        }\n\n        if (trackInfo.hasVideo) {\n          timingInfoFn(segment, 'video', 'start', startTime);\n        } // Run through the CaptionParser in case there are captions.\n        // Initialize CaptionParser if it hasn't been yet\n\n\n        if (!tracks.video || !data.byteLength || !segment.transmuxer) {\n          finishLoading();\n          return;\n        }\n\n        workerCallback({\n          action: 'pushMp4Captions',\n          endAction: 'mp4Captions',\n          transmuxer: segment.transmuxer,\n          data: bytesAsUint8Array,\n          timescales: segment.map.timescales,\n          trackIds: [tracks.video.id],\n          callback: function callback(message) {\n            // transfer bytes back to us\n            bytes = message.data.buffer;\n            segment.bytes = bytesAsUint8Array = message.data;\n            message.logs.forEach(function (log) {\n              onTransmuxerLog(videojs.mergeOptions(log, {\n                stream: 'mp4CaptionParser'\n              }));\n            });\n            finishLoading(message.captions);\n          }\n        });\n      }\n    });\n    return;\n  } // VTT or other segments that don't need processing\n\n\n  if (!segment.transmuxer) {\n    doneFn(null, segment, {});\n    return;\n  }\n\n  if (typeof segment.container === 'undefined') {\n    segment.container = detectContainerForBytes(bytesAsUint8Array);\n  }\n\n  if (segment.container !== 'ts' && segment.container !== 'aac') {\n    trackInfoFn(segment, {\n      hasAudio: false,\n      hasVideo: false\n    });\n    doneFn(null, segment, {});\n    return;\n  } // ts or aac\n\n\n  transmuxAndNotify({\n    segment: segment,\n    bytes: bytes,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  });\n};\n\nvar decrypt = function decrypt(_ref7, callback) {\n  var id = _ref7.id,\n      key = _ref7.key,\n      encryptedBytes = _ref7.encryptedBytes,\n      decryptionWorker = _ref7.decryptionWorker;\n\n  var decryptionHandler = function decryptionHandler(event) {\n    if (event.data.source === id) {\n      decryptionWorker.removeEventListener('message', decryptionHandler);\n      var decrypted = event.data.decrypted;\n      callback(new Uint8Array(decrypted.bytes, decrypted.byteOffset, decrypted.byteLength));\n    }\n  };\n\n  decryptionWorker.addEventListener('message', decryptionHandler);\n  var keyBytes;\n\n  if (key.bytes.slice) {\n    keyBytes = key.bytes.slice();\n  } else {\n    keyBytes = new Uint32Array(Array.prototype.slice.call(key.bytes));\n  } // incrementally decrypt the bytes\n\n\n  decryptionWorker.postMessage(createTransferableMessage({\n    source: id,\n    encrypted: encryptedBytes,\n    key: keyBytes,\n    iv: key.iv\n  }), [encryptedBytes.buffer, keyBytes.buffer]);\n};\n/**\n * Decrypt the segment via the decryption web worker\n *\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after decryption has completed\n */\n\n\nvar decryptSegment = function decryptSegment(_ref8) {\n  var decryptionWorker = _ref8.decryptionWorker,\n      segment = _ref8.segment,\n      trackInfoFn = _ref8.trackInfoFn,\n      timingInfoFn = _ref8.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref8.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref8.audioSegmentTimingInfoFn,\n      id3Fn = _ref8.id3Fn,\n      captionsFn = _ref8.captionsFn,\n      isEndOfTimeline = _ref8.isEndOfTimeline,\n      endedTimelineFn = _ref8.endedTimelineFn,\n      dataFn = _ref8.dataFn,\n      doneFn = _ref8.doneFn,\n      onTransmuxerLog = _ref8.onTransmuxerLog;\n  decrypt({\n    id: segment.requestId,\n    key: segment.key,\n    encryptedBytes: segment.encryptedBytes,\n    decryptionWorker: decryptionWorker\n  }, function (decryptedBytes) {\n    segment.bytes = decryptedBytes;\n    handleSegmentBytes({\n      segment: segment,\n      bytes: segment.bytes,\n      trackInfoFn: trackInfoFn,\n      timingInfoFn: timingInfoFn,\n      videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n      id3Fn: id3Fn,\n      captionsFn: captionsFn,\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: endedTimelineFn,\n      dataFn: dataFn,\n      doneFn: doneFn,\n      onTransmuxerLog: onTransmuxerLog\n    });\n  });\n};\n/**\n * This function waits for all XHRs to finish (with either success or failure)\n * before continueing processing via it's callback. The function gathers errors\n * from each request into a single errors array so that the error status for\n * each request can be examined later.\n *\n * @param {Object} activeXhrs - an object that tracks all XHR requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128 decryption\n *                                       routines\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Function} doneFn - a callback that is executed after all resources have been\n *                            downloaded and any decryption completed\n */\n\n\nvar waitForCompletion = function waitForCompletion(_ref9) {\n  var activeXhrs = _ref9.activeXhrs,\n      decryptionWorker = _ref9.decryptionWorker,\n      trackInfoFn = _ref9.trackInfoFn,\n      timingInfoFn = _ref9.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref9.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref9.audioSegmentTimingInfoFn,\n      id3Fn = _ref9.id3Fn,\n      captionsFn = _ref9.captionsFn,\n      isEndOfTimeline = _ref9.isEndOfTimeline,\n      endedTimelineFn = _ref9.endedTimelineFn,\n      dataFn = _ref9.dataFn,\n      doneFn = _ref9.doneFn,\n      onTransmuxerLog = _ref9.onTransmuxerLog;\n  var count = 0;\n  var didError = false;\n  return function (error, segment) {\n    if (didError) {\n      return;\n    }\n\n    if (error) {\n      didError = true; // If there are errors, we have to abort any outstanding requests\n\n      abortAll(activeXhrs); // Even though the requests above are aborted, and in theory we could wait until we\n      // handle the aborted events from those requests, there are some cases where we may\n      // never get an aborted event. For instance, if the network connection is lost and\n      // there were two requests, the first may have triggered an error immediately, while\n      // the second request remains unsent. In that case, the aborted algorithm will not\n      // trigger an abort: see https://xhr.spec.whatwg.org/#the-abort()-method\n      //\n      // We also can't rely on the ready state of the XHR, since the request that\n      // triggered the connection error may also show as a ready state of 0 (unsent).\n      // Therefore, we have to finish this group of requests immediately after the first\n      // seen error.\n\n      return doneFn(error, segment);\n    }\n\n    count += 1;\n\n    if (count === activeXhrs.length) {\n      var segmentFinish = function segmentFinish() {\n        if (segment.encryptedBytes) {\n          return decryptSegment({\n            decryptionWorker: decryptionWorker,\n            segment: segment,\n            trackInfoFn: trackInfoFn,\n            timingInfoFn: timingInfoFn,\n            videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n            audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n            id3Fn: id3Fn,\n            captionsFn: captionsFn,\n            isEndOfTimeline: isEndOfTimeline,\n            endedTimelineFn: endedTimelineFn,\n            dataFn: dataFn,\n            doneFn: doneFn,\n            onTransmuxerLog: onTransmuxerLog\n          });\n        } // Otherwise, everything is ready just continue\n\n\n        handleSegmentBytes({\n          segment: segment,\n          bytes: segment.bytes,\n          trackInfoFn: trackInfoFn,\n          timingInfoFn: timingInfoFn,\n          videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n          audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n          id3Fn: id3Fn,\n          captionsFn: captionsFn,\n          isEndOfTimeline: isEndOfTimeline,\n          endedTimelineFn: endedTimelineFn,\n          dataFn: dataFn,\n          doneFn: doneFn,\n          onTransmuxerLog: onTransmuxerLog\n        });\n      }; // Keep track of when *all* of the requests have completed\n\n\n      segment.endOfAllRequests = Date.now();\n\n      if (segment.map && segment.map.encryptedBytes && !segment.map.bytes) {\n        return decrypt({\n          decryptionWorker: decryptionWorker,\n          // add -init to the \"id\" to differentiate between segment\n          // and init segment decryption, just in case they happen\n          // at the same time at some point in the future.\n          id: segment.requestId + '-init',\n          encryptedBytes: segment.map.encryptedBytes,\n          key: segment.map.key\n        }, function (decryptedBytes) {\n          segment.map.bytes = decryptedBytes;\n          parseInitSegment(segment, function (parseError) {\n            if (parseError) {\n              abortAll(activeXhrs);\n              return doneFn(parseError, segment);\n            }\n\n            segmentFinish();\n          });\n        });\n      }\n\n      segmentFinish();\n    }\n  };\n};\n/**\n * Calls the abort callback if any request within the batch was aborted. Will only call\n * the callback once per batch of requests, even if multiple were aborted.\n *\n * @param {Object} loadendState - state to check to see if the abort function was called\n * @param {Function} abortFn - callback to call for abort\n */\n\n\nvar handleLoadEnd = function handleLoadEnd(_ref10) {\n  var loadendState = _ref10.loadendState,\n      abortFn = _ref10.abortFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted && abortFn && !loadendState.calledAbortFn) {\n      abortFn();\n      loadendState.calledAbortFn = true;\n    }\n  };\n};\n/**\n * Simple progress event callback handler that gathers some stats before\n * executing a provided callback with the `segment` object\n *\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} progressFn - a callback that is executed each time a progress event\n *                                is received\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that is executed when segment bytes are available\n *                            and ready to use\n * @param {Event} event - the progress event object from XMLHttpRequest\n */\n\n\nvar handleProgress = function handleProgress(_ref11) {\n  var segment = _ref11.segment,\n      progressFn = _ref11.progressFn;\n  _ref11.trackInfoFn;\n  _ref11.timingInfoFn;\n  _ref11.videoSegmentTimingInfoFn;\n  _ref11.audioSegmentTimingInfoFn;\n  _ref11.id3Fn;\n  _ref11.captionsFn;\n  _ref11.isEndOfTimeline;\n  _ref11.endedTimelineFn;\n  _ref11.dataFn;\n  return function (event) {\n    var request = event.target;\n\n    if (request.aborted) {\n      return;\n    }\n\n    segment.stats = videojs.mergeOptions(segment.stats, getProgressStats(event)); // record the time that we receive the first byte of data\n\n    if (!segment.stats.firstBytesReceivedAt && segment.stats.bytesReceived) {\n      segment.stats.firstBytesReceivedAt = Date.now();\n    }\n\n    return progressFn(event, segment);\n  };\n};\n/**\n * Load all resources and does any processing necessary for a media-segment\n *\n * Features:\n *   decrypts the media-segment if it has a key uri and an iv\n *   aborts *all* requests if *any* one request fails\n *\n * The segment object, at minimum, has the following format:\n * {\n *   resolvedUri: String,\n *   [transmuxer]: Object,\n *   [byterange]: {\n *     offset: Number,\n *     length: Number\n *   },\n *   [key]: {\n *     resolvedUri: String\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     iv: {\n *       bytes: Uint32Array\n *     }\n *   },\n *   [map]: {\n *     resolvedUri: String,\n *     [byterange]: {\n *       offset: Number,\n *       length: Number\n *     },\n *     [bytes]: Uint8Array\n *   }\n * }\n * ...where [name] denotes optional properties\n *\n * @param {Function} xhr - an instance of the xhr wrapper in xhr.js\n * @param {Object} xhrOptions - the base options to provide to all xhr requests\n * @param {WebWorker} decryptionWorker - a WebWorker interface to AES-128\n *                                       decryption routines\n * @param {Object} segment - a simplified copy of the segmentInfo object\n *                           from SegmentLoader\n * @param {Function} abortFn - a callback called (only once) if any piece of a request was\n *                             aborted\n * @param {Function} progressFn - a callback that receives progress events from the main\n *                                segment's xhr request\n * @param {Function} trackInfoFn - a callback that receives track info\n * @param {Function} timingInfoFn - a callback that receives timing info\n * @param {Function} videoSegmentTimingInfoFn\n *                   a callback that receives video timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} audioSegmentTimingInfoFn\n *                   a callback that receives audio timing info based on media times and\n *                   any adjustments made by the transmuxer\n * @param {Function} id3Fn - a callback that receives ID3 metadata\n * @param {Function} captionsFn - a callback that receives captions\n * @param {boolean}  isEndOfTimeline\n *                   true if this segment represents the last segment in a timeline\n * @param {Function} endedTimelineFn\n *                   a callback made when a timeline is ended, will only be called if\n *                   isEndOfTimeline is true\n * @param {Function} dataFn - a callback that receives data from the main segment's xhr\n *                            request, transmuxed if needed\n * @param {Function} doneFn - a callback that is executed only once all requests have\n *                            succeeded or failed\n * @return {Function} a function that, when invoked, immediately aborts all\n *                     outstanding requests\n */\n\n\nvar mediaSegmentRequest = function mediaSegmentRequest(_ref12) {\n  var xhr = _ref12.xhr,\n      xhrOptions = _ref12.xhrOptions,\n      decryptionWorker = _ref12.decryptionWorker,\n      segment = _ref12.segment,\n      abortFn = _ref12.abortFn,\n      progressFn = _ref12.progressFn,\n      trackInfoFn = _ref12.trackInfoFn,\n      timingInfoFn = _ref12.timingInfoFn,\n      videoSegmentTimingInfoFn = _ref12.videoSegmentTimingInfoFn,\n      audioSegmentTimingInfoFn = _ref12.audioSegmentTimingInfoFn,\n      id3Fn = _ref12.id3Fn,\n      captionsFn = _ref12.captionsFn,\n      isEndOfTimeline = _ref12.isEndOfTimeline,\n      endedTimelineFn = _ref12.endedTimelineFn,\n      dataFn = _ref12.dataFn,\n      doneFn = _ref12.doneFn,\n      onTransmuxerLog = _ref12.onTransmuxerLog;\n  var activeXhrs = [];\n  var finishProcessingFn = waitForCompletion({\n    activeXhrs: activeXhrs,\n    decryptionWorker: decryptionWorker,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn,\n    doneFn: doneFn,\n    onTransmuxerLog: onTransmuxerLog\n  }); // optionally, request the decryption key\n\n  if (segment.key && !segment.key.bytes) {\n    var objects = [segment.key];\n\n    if (segment.map && !segment.map.bytes && segment.map.key && segment.map.key.resolvedUri === segment.key.resolvedUri) {\n      objects.push(segment.map.key);\n    }\n\n    var keyRequestOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.key.resolvedUri,\n      responseType: 'arraybuffer'\n    });\n    var keyRequestCallback = handleKeyResponse(segment, objects, finishProcessingFn);\n    var keyXhr = xhr(keyRequestOptions, keyRequestCallback);\n    activeXhrs.push(keyXhr);\n  } // optionally, request the associated media init segment\n\n\n  if (segment.map && !segment.map.bytes) {\n    var differentMapKey = segment.map.key && (!segment.key || segment.key.resolvedUri !== segment.map.key.resolvedUri);\n\n    if (differentMapKey) {\n      var mapKeyRequestOptions = videojs.mergeOptions(xhrOptions, {\n        uri: segment.map.key.resolvedUri,\n        responseType: 'arraybuffer'\n      });\n      var mapKeyRequestCallback = handleKeyResponse(segment, [segment.map.key], finishProcessingFn);\n      var mapKeyXhr = xhr(mapKeyRequestOptions, mapKeyRequestCallback);\n      activeXhrs.push(mapKeyXhr);\n    }\n\n    var initSegmentOptions = videojs.mergeOptions(xhrOptions, {\n      uri: segment.map.resolvedUri,\n      responseType: 'arraybuffer',\n      headers: segmentXhrHeaders(segment.map)\n    });\n    var initSegmentRequestCallback = handleInitSegmentResponse({\n      segment: segment,\n      finishProcessingFn: finishProcessingFn\n    });\n    var initSegmentXhr = xhr(initSegmentOptions, initSegmentRequestCallback);\n    activeXhrs.push(initSegmentXhr);\n  }\n\n  var segmentRequestOptions = videojs.mergeOptions(xhrOptions, {\n    uri: segment.part && segment.part.resolvedUri || segment.resolvedUri,\n    responseType: 'arraybuffer',\n    headers: segmentXhrHeaders(segment)\n  });\n  var segmentRequestCallback = handleSegmentResponse({\n    segment: segment,\n    finishProcessingFn: finishProcessingFn,\n    responseType: segmentRequestOptions.responseType\n  });\n  var segmentXhr = xhr(segmentRequestOptions, segmentRequestCallback);\n  segmentXhr.addEventListener('progress', handleProgress({\n    segment: segment,\n    progressFn: progressFn,\n    trackInfoFn: trackInfoFn,\n    timingInfoFn: timingInfoFn,\n    videoSegmentTimingInfoFn: videoSegmentTimingInfoFn,\n    audioSegmentTimingInfoFn: audioSegmentTimingInfoFn,\n    id3Fn: id3Fn,\n    captionsFn: captionsFn,\n    isEndOfTimeline: isEndOfTimeline,\n    endedTimelineFn: endedTimelineFn,\n    dataFn: dataFn\n  }));\n  activeXhrs.push(segmentXhr); // since all parts of the request must be considered, but should not make callbacks\n  // multiple times, provide a shared state object\n\n  var loadendState = {};\n  activeXhrs.forEach(function (activeXhr) {\n    activeXhr.addEventListener('loadend', handleLoadEnd({\n      loadendState: loadendState,\n      abortFn: abortFn\n    }));\n  });\n  return function () {\n    return abortAll(activeXhrs);\n  };\n};\n/**\n * @file - codecs.js - Handles tasks regarding codec strings such as translating them to\n * codec strings, or translating codec strings into objects that can be examined.\n */\n\n\nvar logFn$1 = logger('CodecUtils');\n/**\n * Returns a set of codec strings parsed from the playlist or the default\n * codec strings if no codecs were specified in the playlist\n *\n * @param {Playlist} media the current media playlist\n * @return {Object} an object with the video and audio codecs\n */\n\nvar getCodecs = function getCodecs(media) {\n  // if the codecs were explicitly specified, use them instead of the\n  // defaults\n  var mediaAttributes = media.attributes || {};\n\n  if (mediaAttributes.CODECS) {\n    return parseCodecs(mediaAttributes.CODECS);\n  }\n};\n\nvar isMaat = function isMaat(master, media) {\n  var mediaAttributes = media.attributes || {};\n  return master && master.mediaGroups && master.mediaGroups.AUDIO && mediaAttributes.AUDIO && master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n};\n\nvar isMuxed = function isMuxed(master, media) {\n  if (!isMaat(master, media)) {\n    return true;\n  }\n\n  var mediaAttributes = media.attributes || {};\n  var audioGroup = master.mediaGroups.AUDIO[mediaAttributes.AUDIO];\n\n  for (var groupId in audioGroup) {\n    // If an audio group has a URI (the case for HLS, as HLS will use external playlists),\n    // or there are listed playlists (the case for DASH, as the manifest will have already\n    // provided all of the details necessary to generate the audio playlist, as opposed to\n    // HLS' externally requested playlists), then the content is demuxed.\n    if (!audioGroup[groupId].uri && !audioGroup[groupId].playlists) {\n      return true;\n    }\n  }\n\n  return false;\n};\n\nvar unwrapCodecList = function unwrapCodecList(codecList) {\n  var codecs = {};\n  codecList.forEach(function (_ref) {\n    var mediaType = _ref.mediaType,\n        type = _ref.type,\n        details = _ref.details;\n    codecs[mediaType] = codecs[mediaType] || [];\n    codecs[mediaType].push(translateLegacyCodec(\"\" + type + details));\n  });\n  Object.keys(codecs).forEach(function (mediaType) {\n    if (codecs[mediaType].length > 1) {\n      logFn$1(\"multiple \" + mediaType + \" codecs found as attributes: \" + codecs[mediaType].join(', ') + \". Setting playlist codecs to null so that we wait for mux.js to probe segments for real codecs.\");\n      codecs[mediaType] = null;\n      return;\n    }\n\n    codecs[mediaType] = codecs[mediaType][0];\n  });\n  return codecs;\n};\n\nvar codecCount = function codecCount(codecObj) {\n  var count = 0;\n\n  if (codecObj.audio) {\n    count++;\n  }\n\n  if (codecObj.video) {\n    count++;\n  }\n\n  return count;\n};\n/**\n * Calculates the codec strings for a working configuration of\n * SourceBuffers to play variant streams in a master playlist. If\n * there is no possible working configuration, an empty object will be\n * returned.\n *\n * @param master {Object} the m3u8 object for the master playlist\n * @param media {Object} the m3u8 object for the variant playlist\n * @return {Object} the codec strings.\n *\n * @private\n */\n\n\nvar codecsForPlaylist = function codecsForPlaylist(master, media) {\n  var mediaAttributes = media.attributes || {};\n  var codecInfo = unwrapCodecList(getCodecs(media) || []); // HLS with multiple-audio tracks must always get an audio codec.\n  // Put another way, there is no way to have a video-only multiple-audio HLS!\n\n  if (isMaat(master, media) && !codecInfo.audio) {\n    if (!isMuxed(master, media)) {\n      // It is possible for codecs to be specified on the audio media group playlist but\n      // not on the rendition playlist. This is mostly the case for DASH, where audio and\n      // video are always separate (and separately specified).\n      var defaultCodecs = unwrapCodecList(codecsFromDefault(master, mediaAttributes.AUDIO) || []);\n\n      if (defaultCodecs.audio) {\n        codecInfo.audio = defaultCodecs.audio;\n      }\n    }\n  }\n\n  return codecInfo;\n};\n\nvar logFn = logger('PlaylistSelector');\n\nvar representationToString = function representationToString(representation) {\n  if (!representation || !representation.playlist) {\n    return;\n  }\n\n  var playlist = representation.playlist;\n  return JSON.stringify({\n    id: playlist.id,\n    bandwidth: representation.bandwidth,\n    width: representation.width,\n    height: representation.height,\n    codecs: playlist.attributes && playlist.attributes.CODECS || ''\n  });\n}; // Utilities\n\n/**\n * Returns the CSS value for the specified property on an element\n * using `getComputedStyle`. Firefox has a long-standing issue where\n * getComputedStyle() may return null when running in an iframe with\n * `display: none`.\n *\n * @see https://bugzilla.mozilla.org/show_bug.cgi?id=548397\n * @param {HTMLElement} el the htmlelement to work on\n * @param {string} the proprety to get the style for\n */\n\n\nvar safeGetComputedStyle = function safeGetComputedStyle(el, property) {\n  if (!el) {\n    return '';\n  }\n\n  var result = window$1.getComputedStyle(el);\n\n  if (!result) {\n    return '';\n  }\n\n  return result[property];\n};\n/**\n * Resuable stable sort function\n *\n * @param {Playlists} array\n * @param {Function} sortFn Different comparators\n * @function stableSort\n */\n\n\nvar stableSort = function stableSort(array, sortFn) {\n  var newArray = array.slice();\n  array.sort(function (left, right) {\n    var cmp = sortFn(left, right);\n\n    if (cmp === 0) {\n      return newArray.indexOf(left) - newArray.indexOf(right);\n    }\n\n    return cmp;\n  });\n};\n/**\n * A comparator function to sort two playlist object by bandwidth.\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the bandwidth attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the bandwidth of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistBandwidth = function comparePlaylistBandwidth(left, right) {\n  var leftBandwidth;\n  var rightBandwidth;\n\n  if (left.attributes.BANDWIDTH) {\n    leftBandwidth = left.attributes.BANDWIDTH;\n  }\n\n  leftBandwidth = leftBandwidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.BANDWIDTH) {\n    rightBandwidth = right.attributes.BANDWIDTH;\n  }\n\n  rightBandwidth = rightBandwidth || window$1.Number.MAX_VALUE;\n  return leftBandwidth - rightBandwidth;\n};\n/**\n * A comparator function to sort two playlist object by resolution (width).\n *\n * @param {Object} left a media playlist object\n * @param {Object} right a media playlist object\n * @return {number} Greater than zero if the resolution.width attribute of\n * left is greater than the corresponding attribute of right. Less\n * than zero if the resolution.width of right is greater than left and\n * exactly zero if the two are equal.\n */\n\n\nvar comparePlaylistResolution = function comparePlaylistResolution(left, right) {\n  var leftWidth;\n  var rightWidth;\n\n  if (left.attributes.RESOLUTION && left.attributes.RESOLUTION.width) {\n    leftWidth = left.attributes.RESOLUTION.width;\n  }\n\n  leftWidth = leftWidth || window$1.Number.MAX_VALUE;\n\n  if (right.attributes.RESOLUTION && right.attributes.RESOLUTION.width) {\n    rightWidth = right.attributes.RESOLUTION.width;\n  }\n\n  rightWidth = rightWidth || window$1.Number.MAX_VALUE; // NOTE - Fallback to bandwidth sort as appropriate in cases where multiple renditions\n  // have the same media dimensions/ resolution\n\n  if (leftWidth === rightWidth && left.attributes.BANDWIDTH && right.attributes.BANDWIDTH) {\n    return left.attributes.BANDWIDTH - right.attributes.BANDWIDTH;\n  }\n\n  return leftWidth - rightWidth;\n};\n/**\n * Chooses the appropriate media playlist based on bandwidth and player size\n *\n * @param {Object} master\n *        Object representation of the master manifest\n * @param {number} playerBandwidth\n *        Current calculated bandwidth of the player\n * @param {number} playerWidth\n *        Current width of the player element (should account for the device pixel ratio)\n * @param {number} playerHeight\n *        Current height of the player element (should account for the device pixel ratio)\n * @param {boolean} limitRenditionByPlayerDimensions\n *        True if the player width and height should be used during the selection, false otherwise\n * @param {Object} masterPlaylistController\n *        the current masterPlaylistController object\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar simpleSelector = function simpleSelector(master, playerBandwidth, playerWidth, playerHeight, limitRenditionByPlayerDimensions, masterPlaylistController) {\n  // If we end up getting called before `master` is available, exit early\n  if (!master) {\n    return;\n  }\n\n  var options = {\n    bandwidth: playerBandwidth,\n    width: playerWidth,\n    height: playerHeight,\n    limitRenditionByPlayerDimensions: limitRenditionByPlayerDimensions\n  };\n  var playlists = master.playlists; // if playlist is audio only, select between currently active audio group playlists.\n\n  if (Playlist.isAudioOnly(master)) {\n    playlists = masterPlaylistController.getAudioTrackPlaylists_(); // add audioOnly to options so that we log audioOnly: true\n    // at the buttom of this function for debugging.\n\n    options.audioOnly = true;\n  } // convert the playlists to an intermediary representation to make comparisons easier\n\n\n  var sortedPlaylistReps = playlists.map(function (playlist) {\n    var bandwidth;\n    var width = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.width;\n    var height = playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height;\n    bandwidth = playlist.attributes && playlist.attributes.BANDWIDTH;\n    bandwidth = bandwidth || window$1.Number.MAX_VALUE;\n    return {\n      bandwidth: bandwidth,\n      width: width,\n      height: height,\n      playlist: playlist\n    };\n  });\n  stableSort(sortedPlaylistReps, function (left, right) {\n    return left.bandwidth - right.bandwidth;\n  }); // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  sortedPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return !Playlist.isIncompatible(rep.playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n    return Playlist.isEnabled(rep.playlist);\n  });\n\n  if (!enabledPlaylistReps.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylistReps = sortedPlaylistReps.filter(function (rep) {\n      return !Playlist.isDisabled(rep.playlist);\n    });\n  } // filter out any variant that has greater effective bitrate\n  // than the current estimated bandwidth\n\n\n  var bandwidthPlaylistReps = enabledPlaylistReps.filter(function (rep) {\n    return rep.bandwidth * Config.BANDWIDTH_VARIANCE < playerBandwidth;\n  });\n  var highestRemainingBandwidthRep = bandwidthPlaylistReps[bandwidthPlaylistReps.length - 1]; // get all of the renditions with the same (highest) bandwidth\n  // and then taking the very first element\n\n  var bandwidthBestRep = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0]; // if we're not going to limit renditions by player size, make an early decision.\n\n  if (limitRenditionByPlayerDimensions === false) {\n    var _chosenRep = bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n    if (_chosenRep && _chosenRep.playlist) {\n      var type = 'sortedPlaylistReps';\n\n      if (bandwidthBestRep) {\n        type = 'bandwidthBestRep';\n      }\n\n      if (enabledPlaylistReps[0]) {\n        type = 'enabledPlaylistReps';\n      }\n\n      logFn(\"choosing \" + representationToString(_chosenRep) + \" using \" + type + \" with options\", options);\n      return _chosenRep.playlist;\n    }\n\n    logFn('could not choose a playlist with options', options);\n    return null;\n  } // filter out playlists without resolution information\n\n\n  var haveResolution = bandwidthPlaylistReps.filter(function (rep) {\n    return rep.width && rep.height;\n  }); // sort variants by resolution\n\n  stableSort(haveResolution, function (left, right) {\n    return left.width - right.width;\n  }); // if we have the exact resolution as the player use it\n\n  var resolutionBestRepList = haveResolution.filter(function (rep) {\n    return rep.width === playerWidth && rep.height === playerHeight;\n  });\n  highestRemainingBandwidthRep = resolutionBestRepList[resolutionBestRepList.length - 1]; // ensure that we pick the highest bandwidth variant that have exact resolution\n\n  var resolutionBestRep = resolutionBestRepList.filter(function (rep) {\n    return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n  })[0];\n  var resolutionPlusOneList;\n  var resolutionPlusOneSmallest;\n  var resolutionPlusOneRep; // find the smallest variant that is larger than the player\n  // if there is no match of exact resolution\n\n  if (!resolutionBestRep) {\n    resolutionPlusOneList = haveResolution.filter(function (rep) {\n      return rep.width > playerWidth || rep.height > playerHeight;\n    }); // find all the variants have the same smallest resolution\n\n    resolutionPlusOneSmallest = resolutionPlusOneList.filter(function (rep) {\n      return rep.width === resolutionPlusOneList[0].width && rep.height === resolutionPlusOneList[0].height;\n    }); // ensure that we also pick the highest bandwidth variant that\n    // is just-larger-than the video player\n\n    highestRemainingBandwidthRep = resolutionPlusOneSmallest[resolutionPlusOneSmallest.length - 1];\n    resolutionPlusOneRep = resolutionPlusOneSmallest.filter(function (rep) {\n      return rep.bandwidth === highestRemainingBandwidthRep.bandwidth;\n    })[0];\n  }\n\n  var leastPixelDiffRep; // If this selector proves to be better than others,\n  // resolutionPlusOneRep and resolutionBestRep and all\n  // the code involving them should be removed.\n\n  if (masterPlaylistController.experimentalLeastPixelDiffSelector) {\n    // find the variant that is closest to the player's pixel size\n    var leastPixelDiffList = haveResolution.map(function (rep) {\n      rep.pixelDiff = Math.abs(rep.width - playerWidth) + Math.abs(rep.height - playerHeight);\n      return rep;\n    }); // get the highest bandwidth, closest resolution playlist\n\n    stableSort(leastPixelDiffList, function (left, right) {\n      // sort by highest bandwidth if pixelDiff is the same\n      if (left.pixelDiff === right.pixelDiff) {\n        return right.bandwidth - left.bandwidth;\n      }\n\n      return left.pixelDiff - right.pixelDiff;\n    });\n    leastPixelDiffRep = leastPixelDiffList[0];\n  } // fallback chain of variants\n\n\n  var chosenRep = leastPixelDiffRep || resolutionPlusOneRep || resolutionBestRep || bandwidthBestRep || enabledPlaylistReps[0] || sortedPlaylistReps[0];\n\n  if (chosenRep && chosenRep.playlist) {\n    var _type = 'sortedPlaylistReps';\n\n    if (leastPixelDiffRep) {\n      _type = 'leastPixelDiffRep';\n    } else if (resolutionPlusOneRep) {\n      _type = 'resolutionPlusOneRep';\n    } else if (resolutionBestRep) {\n      _type = 'resolutionBestRep';\n    } else if (bandwidthBestRep) {\n      _type = 'bandwidthBestRep';\n    } else if (enabledPlaylistReps[0]) {\n      _type = 'enabledPlaylistReps';\n    }\n\n    logFn(\"choosing \" + representationToString(chosenRep) + \" using \" + _type + \" with options\", options);\n    return chosenRep.playlist;\n  }\n\n  logFn('could not choose a playlist with options', options);\n  return null;\n};\n/**\n * Chooses the appropriate media playlist based on the most recent\n * bandwidth estimate and the player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Playlist} the highest bitrate playlist less than the\n * currently detected bandwidth, accounting for some amount of\n * bandwidth variance\n */\n\n\nvar lastBandwidthSelector = function lastBandwidthSelector() {\n  var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n  return simpleSelector(this.playlists.master, this.systemBandwidth, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n};\n/**\n * Chooses the appropriate media playlist based on an\n * exponential-weighted moving average of the bandwidth after\n * filtering for player size.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @param {number} decay - a number between 0 and 1. Higher values of\n * this parameter will cause previous bandwidth estimates to lose\n * significance more quickly.\n * @return {Function} a function which can be invoked to create a new\n * playlist selector function.\n * @see https://en.wikipedia.org/wiki/Moving_average#Exponential_moving_average\n */\n\n\nvar movingAverageBandwidthSelector = function movingAverageBandwidthSelector(decay) {\n  var average = -1;\n  var lastSystemBandwidth = -1;\n\n  if (decay < 0 || decay > 1) {\n    throw new Error('Moving average bandwidth decay must be between 0 and 1.');\n  }\n\n  return function () {\n    var pixelRatio = this.useDevicePixelRatio ? window$1.devicePixelRatio || 1 : 1;\n\n    if (average < 0) {\n      average = this.systemBandwidth;\n      lastSystemBandwidth = this.systemBandwidth;\n    } // stop the average value from decaying for every 250ms\n    // when the systemBandwidth is constant\n    // and\n    // stop average from setting to a very low value when the\n    // systemBandwidth becomes 0 in case of chunk cancellation\n\n\n    if (this.systemBandwidth > 0 && this.systemBandwidth !== lastSystemBandwidth) {\n      average = decay * this.systemBandwidth + (1 - decay) * average;\n      lastSystemBandwidth = this.systemBandwidth;\n    }\n\n    return simpleSelector(this.playlists.master, average, parseInt(safeGetComputedStyle(this.tech_.el(), 'width'), 10) * pixelRatio, parseInt(safeGetComputedStyle(this.tech_.el(), 'height'), 10) * pixelRatio, this.limitRenditionByPlayerDimensions, this.masterPlaylistController_);\n  };\n};\n/**\n * Chooses the appropriate media playlist based on the potential to rebuffer\n *\n * @param {Object} settings\n *        Object of information required to use this selector\n * @param {Object} settings.master\n *        Object representation of the master manifest\n * @param {number} settings.currentTime\n *        The current time of the player\n * @param {number} settings.bandwidth\n *        Current measured bandwidth\n * @param {number} settings.duration\n *        Duration of the media\n * @param {number} settings.segmentDuration\n *        Segment duration to be used in round trip time calculations\n * @param {number} settings.timeUntilRebuffer\n *        Time left in seconds until the player has to rebuffer\n * @param {number} settings.currentTimeline\n *        The current timeline segments are being loaded from\n * @param {SyncController} settings.syncController\n *        SyncController for determining if we have a sync point for a given playlist\n * @return {Object|null}\n *         {Object} return.playlist\n *         The highest bandwidth playlist with the least amount of rebuffering\n *         {Number} return.rebufferingImpact\n *         The amount of time in seconds switching to this playlist will rebuffer. A\n *         negative value means that switching will cause zero rebuffering.\n */\n\n\nvar minRebufferMaxBandwidthSelector = function minRebufferMaxBandwidthSelector(settings) {\n  var master = settings.master,\n      currentTime = settings.currentTime,\n      bandwidth = settings.bandwidth,\n      duration = settings.duration,\n      segmentDuration = settings.segmentDuration,\n      timeUntilRebuffer = settings.timeUntilRebuffer,\n      currentTimeline = settings.currentTimeline,\n      syncController = settings.syncController; // filter out any playlists that have been excluded due to\n  // incompatible configurations\n\n  var compatiblePlaylists = master.playlists.filter(function (playlist) {\n    return !Playlist.isIncompatible(playlist);\n  }); // filter out any playlists that have been disabled manually through the representations\n  // api or blacklisted temporarily due to playback errors.\n\n  var enabledPlaylists = compatiblePlaylists.filter(Playlist.isEnabled);\n\n  if (!enabledPlaylists.length) {\n    // if there are no enabled playlists, then they have all been blacklisted or disabled\n    // by the user through the representations api. In this case, ignore blacklisting and\n    // fallback to what the user wants by using playlists the user has not disabled.\n    enabledPlaylists = compatiblePlaylists.filter(function (playlist) {\n      return !Playlist.isDisabled(playlist);\n    });\n  }\n\n  var bandwidthPlaylists = enabledPlaylists.filter(Playlist.hasAttribute.bind(null, 'BANDWIDTH'));\n  var rebufferingEstimates = bandwidthPlaylists.map(function (playlist) {\n    var syncPoint = syncController.getSyncPoint(playlist, duration, currentTimeline, currentTime); // If there is no sync point for this playlist, switching to it will require a\n    // sync request first. This will double the request time\n\n    var numRequests = syncPoint ? 1 : 2;\n    var requestTimeEstimate = Playlist.estimateSegmentRequestTime(segmentDuration, bandwidth, playlist);\n    var rebufferingImpact = requestTimeEstimate * numRequests - timeUntilRebuffer;\n    return {\n      playlist: playlist,\n      rebufferingImpact: rebufferingImpact\n    };\n  });\n  var noRebufferingPlaylists = rebufferingEstimates.filter(function (estimate) {\n    return estimate.rebufferingImpact <= 0;\n  }); // Sort by bandwidth DESC\n\n  stableSort(noRebufferingPlaylists, function (a, b) {\n    return comparePlaylistBandwidth(b.playlist, a.playlist);\n  });\n\n  if (noRebufferingPlaylists.length) {\n    return noRebufferingPlaylists[0];\n  }\n\n  stableSort(rebufferingEstimates, function (a, b) {\n    return a.rebufferingImpact - b.rebufferingImpact;\n  });\n  return rebufferingEstimates[0] || null;\n};\n/**\n * Chooses the appropriate media playlist, which in this case is the lowest bitrate\n * one with video.  If no renditions with video exist, return the lowest audio rendition.\n *\n * Expects to be called within the context of an instance of VhsHandler\n *\n * @return {Object|null}\n *         {Object} return.playlist\n *         The lowest bitrate playlist that contains a video codec.  If no such rendition\n *         exists pick the lowest audio rendition.\n */\n\n\nvar lowestBitrateCompatibleVariantSelector = function lowestBitrateCompatibleVariantSelector() {\n  var _this = this; // filter out any playlists that have been excluded due to\n  // incompatible configurations or playback errors\n\n\n  var playlists = this.playlists.master.playlists.filter(Playlist.isEnabled); // Sort ascending by bitrate\n\n  stableSort(playlists, function (a, b) {\n    return comparePlaylistBandwidth(a, b);\n  }); // Parse and assume that playlists with no video codec have no video\n  // (this is not necessarily true, although it is generally true).\n  //\n  // If an entire manifest has no valid videos everything will get filtered\n  // out.\n\n  var playlistsWithVideo = playlists.filter(function (playlist) {\n    return !!codecsForPlaylist(_this.playlists.master, playlist).video;\n  });\n  return playlistsWithVideo[0] || null;\n};\n/**\n * Combine all segments into a single Uint8Array\n *\n * @param {Object} segmentObj\n * @return {Uint8Array} concatenated bytes\n * @private\n */\n\n\nvar concatSegments = function concatSegments(segmentObj) {\n  var offset = 0;\n  var tempBuffer;\n\n  if (segmentObj.bytes) {\n    tempBuffer = new Uint8Array(segmentObj.bytes); // combine the individual segments into one large typed-array\n\n    segmentObj.segments.forEach(function (segment) {\n      tempBuffer.set(segment, offset);\n      offset += segment.byteLength;\n    });\n  }\n\n  return tempBuffer;\n};\n/**\n * @file text-tracks.js\n */\n\n/**\n * Create captions text tracks on video.js if they do not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {Object} tech the video.js tech\n * @param {Object} captionStream the caption stream to create\n * @private\n */\n\n\nvar createCaptionsTrackIfNotExists = function createCaptionsTrackIfNotExists(inbandTextTracks, tech, captionStream) {\n  if (!inbandTextTracks[captionStream]) {\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-608'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-608'\n    });\n    var instreamId = captionStream; // we need to translate SERVICEn for 708 to how mux.js currently labels them\n\n    if (/^cc708_/.test(captionStream)) {\n      instreamId = 'SERVICE' + captionStream.split('_')[1];\n    }\n\n    var track = tech.textTracks().getTrackById(instreamId);\n\n    if (track) {\n      // Resuse an existing track with a CC# id because this was\n      // very likely created by videojs-contrib-hls from information\n      // in the m3u8 for us to use\n      inbandTextTracks[captionStream] = track;\n    } else {\n      // This section gets called when we have caption services that aren't specified in the manifest.\n      // Manifest level caption services are handled in media-groups.js under CLOSED-CAPTIONS.\n      var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n      var label = captionStream;\n      var language = captionStream;\n      var def = false;\n      var captionService = captionServices[instreamId];\n\n      if (captionService) {\n        label = captionService.label;\n        language = captionService.language;\n        def = captionService[\"default\"];\n      } // Otherwise, create a track with the default `CC#` label and\n      // without a language\n\n\n      inbandTextTracks[captionStream] = tech.addRemoteTextTrack({\n        kind: 'captions',\n        id: instreamId,\n        // TODO: investigate why this doesn't seem to turn the caption on by default\n        \"default\": def,\n        label: label,\n        language: language\n      }, false).track;\n    }\n  }\n};\n/**\n * Add caption text track data to a source handler given an array of captions\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {Array} captionArray an array of caption data\n * @private\n */\n\n\nvar addCaptionData = function addCaptionData(_ref) {\n  var inbandTextTracks = _ref.inbandTextTracks,\n      captionArray = _ref.captionArray,\n      timestampOffset = _ref.timestampOffset;\n\n  if (!captionArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  captionArray.forEach(function (caption) {\n    var track = caption.stream;\n    inbandTextTracks[track].addCue(new Cue(caption.startTime + timestampOffset, caption.endTime + timestampOffset, caption.text));\n  });\n};\n/**\n * Define properties on a cue for backwards compatability,\n * but warn the user that the way that they are using it\n * is depricated and will be removed at a later date.\n *\n * @param {Cue} cue the cue to add the properties on\n * @private\n */\n\n\nvar deprecateOldCue = function deprecateOldCue(cue) {\n  Object.defineProperties(cue.frame, {\n    id: {\n      get: function get() {\n        videojs.log.warn('cue.frame.id is deprecated. Use cue.value.key instead.');\n        return cue.value.key;\n      }\n    },\n    value: {\n      get: function get() {\n        videojs.log.warn('cue.frame.value is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    },\n    privateData: {\n      get: function get() {\n        videojs.log.warn('cue.frame.privateData is deprecated. Use cue.value.data instead.');\n        return cue.value.data;\n      }\n    }\n  });\n};\n/**\n * Add metadata text track data to a source handler given an array of metadata\n *\n * @param {Object}\n *   @param {Object} inbandTextTracks the inband text tracks\n *   @param {Array} metadataArray an array of meta data\n *   @param {number} timestampOffset the timestamp offset of the source buffer\n *   @param {number} videoDuration the duration of the video\n * @private\n */\n\n\nvar addMetadata = function addMetadata(_ref2) {\n  var inbandTextTracks = _ref2.inbandTextTracks,\n      metadataArray = _ref2.metadataArray,\n      timestampOffset = _ref2.timestampOffset,\n      videoDuration = _ref2.videoDuration;\n\n  if (!metadataArray) {\n    return;\n  }\n\n  var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n  var metadataTrack = inbandTextTracks.metadataTrack_;\n\n  if (!metadataTrack) {\n    return;\n  }\n\n  metadataArray.forEach(function (metadata) {\n    var time = metadata.cueTime + timestampOffset; // if time isn't a finite number between 0 and Infinity, like NaN,\n    // ignore this bit of metadata.\n    // This likely occurs when you have an non-timed ID3 tag like TIT2,\n    // which is the \"Title/Songname/Content description\" frame\n\n    if (typeof time !== 'number' || window$1.isNaN(time) || time < 0 || !(time < Infinity)) {\n      return;\n    }\n\n    metadata.frames.forEach(function (frame) {\n      var cue = new Cue(time, time, frame.value || frame.url || frame.data || '');\n      cue.frame = frame;\n      cue.value = frame;\n      deprecateOldCue(cue);\n      metadataTrack.addCue(cue);\n    });\n  });\n\n  if (!metadataTrack.cues || !metadataTrack.cues.length) {\n    return;\n  } // Updating the metadeta cues so that\n  // the endTime of each cue is the startTime of the next cue\n  // the endTime of last cue is the duration of the video\n\n\n  var cues = metadataTrack.cues;\n  var cuesArray = []; // Create a copy of the TextTrackCueList...\n  // ...disregarding cues with a falsey value\n\n  for (var i = 0; i < cues.length; i++) {\n    if (cues[i]) {\n      cuesArray.push(cues[i]);\n    }\n  } // Group cues by their startTime value\n\n\n  var cuesGroupedByStartTime = cuesArray.reduce(function (obj, cue) {\n    var timeSlot = obj[cue.startTime] || [];\n    timeSlot.push(cue);\n    obj[cue.startTime] = timeSlot;\n    return obj;\n  }, {}); // Sort startTimes by ascending order\n\n  var sortedStartTimes = Object.keys(cuesGroupedByStartTime).sort(function (a, b) {\n    return Number(a) - Number(b);\n  }); // Map each cue group's endTime to the next group's startTime\n\n  sortedStartTimes.forEach(function (startTime, idx) {\n    var cueGroup = cuesGroupedByStartTime[startTime];\n    var nextTime = Number(sortedStartTimes[idx + 1]) || videoDuration; // Map each cue's endTime the next group's startTime\n\n    cueGroup.forEach(function (cue) {\n      cue.endTime = nextTime;\n    });\n  });\n};\n/**\n * Create metadata text track on video.js if it does not exist\n *\n * @param {Object} inbandTextTracks a reference to current inbandTextTracks\n * @param {string} dispatchType the inband metadata track dispatch type\n * @param {Object} tech the video.js tech\n * @private\n */\n\n\nvar createMetadataTrackIfNotExists = function createMetadataTrackIfNotExists(inbandTextTracks, dispatchType, tech) {\n  if (inbandTextTracks.metadataTrack_) {\n    return;\n  }\n\n  inbandTextTracks.metadataTrack_ = tech.addRemoteTextTrack({\n    kind: 'metadata',\n    label: 'Timed Metadata'\n  }, false).track;\n  inbandTextTracks.metadataTrack_.inBandMetadataTrackDispatchType = dispatchType;\n};\n/**\n * Remove cues from a track on video.js.\n *\n * @param {Double} start start of where we should remove the cue\n * @param {Double} end end of where the we should remove the cue\n * @param {Object} track the text track to remove the cues from\n * @private\n */\n\n\nvar removeCuesFromTrack = function removeCuesFromTrack(start, end, track) {\n  var i;\n  var cue;\n\n  if (!track) {\n    return;\n  }\n\n  if (!track.cues) {\n    return;\n  }\n\n  i = track.cues.length;\n\n  while (i--) {\n    cue = track.cues[i]; // Remove any cue within the provided start and end time\n\n    if (cue.startTime >= start && cue.endTime <= end) {\n      track.removeCue(cue);\n    }\n  }\n};\n/**\n * Remove duplicate cues from a track on video.js (a cue is considered a\n * duplicate if it has the same time interval and text as another)\n *\n * @param {Object} track the text track to remove the duplicate cues from\n * @private\n */\n\n\nvar removeDuplicateCuesFromTrack = function removeDuplicateCuesFromTrack(track) {\n  var cues = track.cues;\n\n  if (!cues) {\n    return;\n  }\n\n  for (var i = 0; i < cues.length; i++) {\n    var duplicates = [];\n    var occurrences = 0;\n\n    for (var j = 0; j < cues.length; j++) {\n      if (cues[i].startTime === cues[j].startTime && cues[i].endTime === cues[j].endTime && cues[i].text === cues[j].text) {\n        occurrences++;\n\n        if (occurrences > 1) {\n          duplicates.push(cues[j]);\n        }\n      }\n    }\n\n    if (duplicates.length) {\n      duplicates.forEach(function (dupe) {\n        return track.removeCue(dupe);\n      });\n    }\n  }\n};\n/**\n * Returns a list of gops in the buffer that have a pts value of 3 seconds or more in\n * front of current time.\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {number} currentTime\n *        The current time\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n * @return {Array}\n *         List of gops considered safe to append over\n */\n\n\nvar gopsSafeToAlignWith = function gopsSafeToAlignWith(buffer, currentTime, mapping) {\n  if (typeof currentTime === 'undefined' || currentTime === null || !buffer.length) {\n    return [];\n  } // pts value for current time + 3 seconds to give a bit more wiggle room\n\n\n  var currentTimePts = Math.ceil((currentTime - mapping + 3) * ONE_SECOND_IN_TS);\n  var i;\n\n  for (i = 0; i < buffer.length; i++) {\n    if (buffer[i].pts > currentTimePts) {\n      break;\n    }\n  }\n\n  return buffer.slice(i);\n};\n/**\n * Appends gop information (timing and byteLength) received by the transmuxer for the\n * gops appended in the last call to appendBuffer\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Array} gops\n *        List of new gop information\n * @param {boolean} replace\n *        If true, replace the buffer with the new gop information. If false, append the\n *        new gop information to the buffer in the right location of time.\n * @return {Array}\n *         Updated list of gop information\n */\n\n\nvar updateGopBuffer = function updateGopBuffer(buffer, gops, replace) {\n  if (!gops.length) {\n    return buffer;\n  }\n\n  if (replace) {\n    // If we are in safe append mode, then completely overwrite the gop buffer\n    // with the most recent appeneded data. This will make sure that when appending\n    // future segments, we only try to align with gops that are both ahead of current\n    // time and in the last segment appended.\n    return gops.slice();\n  }\n\n  var start = gops[0].pts;\n  var i = 0;\n\n  for (i; i < buffer.length; i++) {\n    if (buffer[i].pts >= start) {\n      break;\n    }\n  }\n\n  return buffer.slice(0, i).concat(gops);\n};\n/**\n * Removes gop information in buffer that overlaps with provided start and end\n *\n * @param {Array} buffer\n *        The current buffer of gop information\n * @param {Double} start\n *        position to start the remove at\n * @param {Double} end\n *        position to end the remove at\n * @param {Double} mapping\n *        Offset to map display time to stream presentation time\n */\n\n\nvar removeGopBuffer = function removeGopBuffer(buffer, start, end, mapping) {\n  var startPts = Math.ceil((start - mapping) * ONE_SECOND_IN_TS);\n  var endPts = Math.ceil((end - mapping) * ONE_SECOND_IN_TS);\n  var updatedBuffer = buffer.slice();\n  var i = buffer.length;\n\n  while (i--) {\n    if (buffer[i].pts <= endPts) {\n      break;\n    }\n  }\n\n  if (i === -1) {\n    // no removal because end of remove range is before start of buffer\n    return updatedBuffer;\n  }\n\n  var j = i + 1;\n\n  while (j--) {\n    if (buffer[j].pts <= startPts) {\n      break;\n    }\n  } // clamp remove range start to 0 index\n\n\n  j = Math.max(j, 0);\n  updatedBuffer.splice(j, i - j + 1);\n  return updatedBuffer;\n};\n\nvar shallowEqual = function shallowEqual(a, b) {\n  // if both are undefined\n  // or one or the other is undefined\n  // they are not equal\n  if (!a && !b || !a && b || a && !b) {\n    return false;\n  } // they are the same object and thus, equal\n\n\n  if (a === b) {\n    return true;\n  } // sort keys so we can make sure they have\n  // all the same keys later.\n\n\n  var akeys = Object.keys(a).sort();\n  var bkeys = Object.keys(b).sort(); // different number of keys, not equal\n\n  if (akeys.length !== bkeys.length) {\n    return false;\n  }\n\n  for (var i = 0; i < akeys.length; i++) {\n    var key = akeys[i]; // different sorted keys, not equal\n\n    if (key !== bkeys[i]) {\n      return false;\n    } // different values, not equal\n\n\n    if (a[key] !== b[key]) {\n      return false;\n    }\n  }\n\n  return true;\n}; // https://www.w3.org/TR/WebIDL-1/#quotaexceedederror\n\n\nvar QUOTA_EXCEEDED_ERR = 22;\n/**\n * The segment loader has no recourse except to fetch a segment in the\n * current playlist and use the internal timestamps in that segment to\n * generate a syncPoint. This function returns a good candidate index\n * for that process.\n *\n * @param {Array} segments - the segments array from a playlist.\n * @return {number} An index of a segment from the playlist to load\n */\n\nvar getSyncSegmentCandidate = function getSyncSegmentCandidate(currentTimeline, segments, targetTime) {\n  segments = segments || [];\n  var timelineSegments = [];\n  var time = 0;\n\n  for (var i = 0; i < segments.length; i++) {\n    var segment = segments[i];\n\n    if (currentTimeline === segment.timeline) {\n      timelineSegments.push(i);\n      time += segment.duration;\n\n      if (time > targetTime) {\n        return i;\n      }\n    }\n  }\n\n  if (timelineSegments.length === 0) {\n    return 0;\n  } // default to the last timeline segment\n\n\n  return timelineSegments[timelineSegments.length - 1];\n}; // In the event of a quota exceeded error, keep at least one second of back buffer. This\n// number was arbitrarily chosen and may be updated in the future, but seemed reasonable\n// as a start to prevent any potential issues with removing content too close to the\n// playhead.\n\n\nvar MIN_BACK_BUFFER = 1; // in ms\n\nvar CHECK_BUFFER_DELAY = 500;\n\nvar finite = function finite(num) {\n  return typeof num === 'number' && isFinite(num);\n}; // With most content hovering around 30fps, if a segment has a duration less than a half\n// frame at 30fps or one frame at 60fps, the bandwidth and throughput calculations will\n// not accurately reflect the rest of the content.\n\n\nvar MIN_SEGMENT_DURATION_TO_SAVE_STATS = 1 / 60;\n\nvar illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, trackInfo) {\n  // Although these checks should most likely cover non 'main' types, for now it narrows\n  // the scope of our checks.\n  if (loaderType !== 'main' || !startingMedia || !trackInfo) {\n    return null;\n  }\n\n  if (!trackInfo.hasAudio && !trackInfo.hasVideo) {\n    return 'Neither audio nor video found in segment.';\n  }\n\n  if (startingMedia.hasVideo && !trackInfo.hasVideo) {\n    return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  if (!startingMedia.hasVideo && trackInfo.hasVideo) {\n    return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  return null;\n};\n/**\n * Calculates a time value that is safe to remove from the back buffer without interrupting\n * playback.\n *\n * @param {TimeRange} seekable\n *        The current seekable range\n * @param {number} currentTime\n *        The current time of the player\n * @param {number} targetDuration\n *        The target duration of the current playlist\n * @return {number}\n *         Time that is safe to remove from the back buffer without interrupting playback\n */\n\n\nvar safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable, currentTime, targetDuration) {\n  // 30 seconds before the playhead provides a safe default for trimming.\n  //\n  // Choosing a reasonable default is particularly important for high bitrate content and\n  // VOD videos/live streams with large windows, as the buffer may end up overfilled and\n  // throw an APPEND_BUFFER_ERR.\n  var trimTime = currentTime - Config.BACK_BUFFER_LENGTH;\n\n  if (seekable.length) {\n    // Some live playlists may have a shorter window of content than the full allowed back\n    // buffer. For these playlists, don't save content that's no longer within the window.\n    trimTime = Math.max(trimTime, seekable.start(0));\n  } // Don't remove within target duration of the current time to avoid the possibility of\n  // removing the GOP currently being played, as removing it can cause playback stalls.\n\n\n  var maxTrimTime = currentTime - targetDuration;\n  return Math.min(maxTrimTime, trimTime);\n};\n\nvar segmentInfoString = function segmentInfoString(segmentInfo) {\n  var startOfSegment = segmentInfo.startOfSegment,\n      duration = segmentInfo.duration,\n      segment = segmentInfo.segment,\n      part = segmentInfo.part,\n      _segmentInfo$playlist = segmentInfo.playlist,\n      seq = _segmentInfo$playlist.mediaSequence,\n      id = _segmentInfo$playlist.id,\n      _segmentInfo$playlist2 = _segmentInfo$playlist.segments,\n      segments = _segmentInfo$playlist2 === void 0 ? [] : _segmentInfo$playlist2,\n      index = segmentInfo.mediaIndex,\n      partIndex = segmentInfo.partIndex,\n      timeline = segmentInfo.timeline;\n  var segmentLen = segments.length - 1;\n  var selection = 'mediaIndex/partIndex increment';\n\n  if (segmentInfo.getMediaInfoForTime) {\n    selection = \"getMediaInfoForTime (\" + segmentInfo.getMediaInfoForTime + \")\";\n  } else if (segmentInfo.isSyncRequest) {\n    selection = 'getSyncSegmentCandidate (isSyncRequest)';\n  }\n\n  if (segmentInfo.independent) {\n    selection += \" with independent \" + segmentInfo.independent;\n  }\n\n  var hasPartIndex = typeof partIndex === 'number';\n  var name = segmentInfo.segment.uri ? 'segment' : 'pre-segment';\n  var zeroBasedPartCount = hasPartIndex ? getKnownPartCount({\n    preloadSegment: segment\n  }) - 1 : 0;\n  return name + \" [\" + (seq + index) + \"/\" + (seq + segmentLen) + \"]\" + (hasPartIndex ? \" part [\" + partIndex + \"/\" + zeroBasedPartCount + \"]\" : '') + (\" segment start/end [\" + segment.start + \" => \" + segment.end + \"]\") + (hasPartIndex ? \" part start/end [\" + part.start + \" => \" + part.end + \"]\" : '') + (\" startOfSegment [\" + startOfSegment + \"]\") + (\" duration [\" + duration + \"]\") + (\" timeline [\" + timeline + \"]\") + (\" selected by [\" + selection + \"]\") + (\" playlist [\" + id + \"]\");\n};\n\nvar timingInfoPropertyForMedia = function timingInfoPropertyForMedia(mediaType) {\n  return mediaType + \"TimingInfo\";\n};\n/**\n * Returns the timestamp offset to use for the segment.\n *\n * @param {number} segmentTimeline\n *        The timeline of the segment\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} startOfSegment\n *        The estimated segment start\n * @param {TimeRange[]} buffered\n *        The loader's buffer\n * @param {boolean} overrideCheck\n *        If true, no checks are made to see if the timestamp offset value should be set,\n *        but sets it directly to a value.\n *\n * @return {number|null}\n *         Either a number representing a new timestamp offset, or null if the segment is\n *         part of the same timeline\n */\n\n\nvar timestampOffsetForSegment = function timestampOffsetForSegment(_ref) {\n  var segmentTimeline = _ref.segmentTimeline,\n      currentTimeline = _ref.currentTimeline,\n      startOfSegment = _ref.startOfSegment,\n      buffered = _ref.buffered,\n      overrideCheck = _ref.overrideCheck; // Check to see if we are crossing a discontinuity to see if we need to set the\n  // timestamp offset on the transmuxer and source buffer.\n  //\n  // Previously, we changed the timestampOffset if the start of this segment was less than\n  // the currently set timestampOffset, but this isn't desirable as it can produce bad\n  // behavior, especially around long running live streams.\n\n  if (!overrideCheck && segmentTimeline === currentTimeline) {\n    return null;\n  } // When changing renditions, it's possible to request a segment on an older timeline. For\n  // instance, given two renditions with the following:\n  //\n  // #EXTINF:10\n  // segment1\n  // #EXT-X-DISCONTINUITY\n  // #EXTINF:10\n  // segment2\n  // #EXTINF:10\n  // segment3\n  //\n  // And the current player state:\n  //\n  // current time: 8\n  // buffer: 0 => 20\n  //\n  // The next segment on the current rendition would be segment3, filling the buffer from\n  // 20s onwards. However, if a rendition switch happens after segment2 was requested,\n  // then the next segment to be requested will be segment1 from the new rendition in\n  // order to fill time 8 and onwards. Using the buffered end would result in repeated\n  // content (since it would position segment1 of the new rendition starting at 20s). This\n  // case can be identified when the new segment's timeline is a prior value. Instead of\n  // using the buffered end, the startOfSegment can be used, which, hopefully, will be\n  // more accurate to the actual start time of the segment.\n\n\n  if (segmentTimeline < currentTimeline) {\n    return startOfSegment;\n  } // segmentInfo.startOfSegment used to be used as the timestamp offset, however, that\n  // value uses the end of the last segment if it is available. While this value\n  // should often be correct, it's better to rely on the buffered end, as the new\n  // content post discontinuity should line up with the buffered end as if it were\n  // time 0 for the new content.\n\n\n  return buffered.length ? buffered.end(buffered.length - 1) : startOfSegment;\n};\n/**\n * Returns whether or not the loader should wait for a timeline change from the timeline\n * change controller before processing the segment.\n *\n * Primary timing in VHS goes by video. This is different from most media players, as\n * audio is more often used as the primary timing source. For the foreseeable future, VHS\n * will continue to use video as the primary timing source, due to the current logic and\n * expectations built around it.\n\n * Since the timing follows video, in order to maintain sync, the video loader is\n * responsible for setting both audio and video source buffer timestamp offsets.\n *\n * Setting different values for audio and video source buffers could lead to\n * desyncing. The following examples demonstrate some of the situations where this\n * distinction is important. Note that all of these cases involve demuxed content. When\n * content is muxed, the audio and video are packaged together, therefore syncing\n * separate media playlists is not an issue.\n *\n * CASE 1: Audio prepares to load a new timeline before video:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:                     ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader              ^\n *\n * In the above example, the audio loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the video loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the audio loader goes ahead and loads and appends the 6th segment before the video\n * loader crosses the discontinuity, then when appended, the 6th audio segment will use\n * the timestamp offset from timeline 0. This will likely lead to desyncing. In addition,\n * the audio loader must provide the audioAppendStart value to trim the content in the\n * transmuxer, and that value relies on the audio timestamp offset. Since the audio\n * timestamp offset is set by the video (main) loader, the audio loader shouldn't load the\n * segment until that value is provided.\n *\n * CASE 2: Video prepares to load a new timeline before audio:\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:             ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader                      ^\n *\n * In the above example, the video loader is preparing to load the 6th segment, the first\n * after a discontinuity, while the audio loader is still loading the 5th segment, before\n * the discontinuity.\n *\n * If the video loader goes ahead and loads and appends the 6th segment, then once the\n * segment is loaded and processed, both the video and audio timestamp offsets will be\n * set, since video is used as the primary timing source. This is to ensure content lines\n * up appropriately, as any modifications to the video timing are reflected by audio when\n * the video loader sets the audio and video timestamp offsets to the same value. However,\n * setting the timestamp offset for audio before audio has had a chance to change\n * timelines will likely lead to desyncing, as the audio loader will append segment 5 with\n * a timestamp intended to apply to segments from timeline 1 rather than timeline 0.\n *\n * CASE 3: When seeking, audio prepares to load a new timeline before video\n *\n * Timeline:       0                 1\n * Audio Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Audio Loader:           ^\n * Video Segments: 0 1 2 3 4 5 DISCO 6 7 8 9\n * Video Loader            ^\n *\n * In the above example, both audio and video loaders are loading segments from timeline\n * 0, but imagine that the seek originated from timeline 1.\n *\n * When seeking to a new timeline, the timestamp offset will be set based on the expected\n * segment start of the loaded video segment. In order to maintain sync, the audio loader\n * must wait for the video loader to load its segment and update both the audio and video\n * timestamp offsets before it may load and append its own segment. This is the case\n * whether the seek results in a mismatched segment request (e.g., the audio loader\n * chooses to load segment 3 and the video loader chooses to load segment 4) or the\n * loaders choose to load the same segment index from each playlist, as the segments may\n * not be aligned perfectly, even for matching segment indexes.\n *\n * @param {Object} timelinechangeController\n * @param {number} currentTimeline\n *        The timeline currently being followed by the loader\n * @param {number} segmentTimeline\n *        The timeline of the segment being loaded\n * @param {('main'|'audio')} loaderType\n *        The loader type\n * @param {boolean} audioDisabled\n *        Whether the audio is disabled for the loader. This should only be true when the\n *        loader may have muxed audio in its segment, but should not append it, e.g., for\n *        the main loader when an alternate audio playlist is active.\n *\n * @return {boolean}\n *         Whether the loader should wait for a timeline change from the timeline change\n *         controller before processing the segment\n */\n\n\nvar shouldWaitForTimelineChange = function shouldWaitForTimelineChange(_ref2) {\n  var timelineChangeController = _ref2.timelineChangeController,\n      currentTimeline = _ref2.currentTimeline,\n      segmentTimeline = _ref2.segmentTimeline,\n      loaderType = _ref2.loaderType,\n      audioDisabled = _ref2.audioDisabled;\n\n  if (currentTimeline === segmentTimeline) {\n    return false;\n  }\n\n  if (loaderType === 'audio') {\n    var lastMainTimelineChange = timelineChangeController.lastTimelineChange({\n      type: 'main'\n    }); // Audio loader should wait if:\n    //\n    // * main hasn't had a timeline change yet (thus has not loaded its first segment)\n    // * main hasn't yet changed to the timeline audio is looking to load\n\n    return !lastMainTimelineChange || lastMainTimelineChange.to !== segmentTimeline;\n  } // The main loader only needs to wait for timeline changes if there's demuxed audio.\n  // Otherwise, there's nothing to wait for, since audio would be muxed into the main\n  // loader's segments (or the content is audio/video only and handled by the main\n  // loader).\n\n\n  if (loaderType === 'main' && audioDisabled) {\n    var pendingAudioTimelineChange = timelineChangeController.pendingTimelineChange({\n      type: 'audio'\n    }); // Main loader should wait for the audio loader if audio is not pending a timeline\n    // change to the current timeline.\n    //\n    // Since the main loader is responsible for setting the timestamp offset for both\n    // audio and video, the main loader must wait for audio to be about to change to its\n    // timeline before setting the offset, otherwise, if audio is behind in loading,\n    // segments from the previous timeline would be adjusted by the new timestamp offset.\n    //\n    // This requirement means that video will not cross a timeline until the audio is\n    // about to cross to it, so that way audio and video will always cross the timeline\n    // together.\n    //\n    // In addition to normal timeline changes, these rules also apply to the start of a\n    // stream (going from a non-existent timeline, -1, to timeline 0). It's important\n    // that these rules apply to the first timeline change because if they did not, it's\n    // possible that the main loader will cross two timelines before the audio loader has\n    // crossed one. Logic may be implemented to handle the startup as a special case, but\n    // it's easier to simply treat all timeline changes the same.\n\n    if (pendingAudioTimelineChange && pendingAudioTimelineChange.to === segmentTimeline) {\n      return false;\n    }\n\n    return true;\n  }\n\n  return false;\n};\n\nvar mediaDuration = function mediaDuration(timingInfos) {\n  var maxDuration = 0;\n  ['video', 'audio'].forEach(function (type) {\n    var typeTimingInfo = timingInfos[type + \"TimingInfo\"];\n\n    if (!typeTimingInfo) {\n      return;\n    }\n\n    var start = typeTimingInfo.start,\n        end = typeTimingInfo.end;\n    var duration;\n\n    if (typeof start === 'bigint' || typeof end === 'bigint') {\n      duration = window$1.BigInt(end) - window$1.BigInt(start);\n    } else if (typeof start === 'number' && typeof end === 'number') {\n      duration = end - start;\n    }\n\n    if (typeof duration !== 'undefined' && duration > maxDuration) {\n      maxDuration = duration;\n    }\n  }); // convert back to a number if it is lower than MAX_SAFE_INTEGER\n  // as we only need BigInt when we are above that.\n\n  if (typeof maxDuration === 'bigint' && maxDuration < Number.MAX_SAFE_INTEGER) {\n    maxDuration = Number(maxDuration);\n  }\n\n  return maxDuration;\n};\n\nvar segmentTooLong = function segmentTooLong(_ref3) {\n  var segmentDuration = _ref3.segmentDuration,\n      maxDuration = _ref3.maxDuration; // 0 duration segments are most likely due to metadata only segments or a lack of\n  // information.\n\n  if (!segmentDuration) {\n    return false;\n  } // For HLS:\n  //\n  // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1\n  // The EXTINF duration of each Media Segment in the Playlist\n  // file, when rounded to the nearest integer, MUST be less than or equal\n  // to the target duration; longer segments can trigger playback stalls\n  // or other errors.\n  //\n  // For DASH, the mpd-parser uses the largest reported segment duration as the target\n  // duration. Although that reported duration is occasionally approximate (i.e., not\n  // exact), a strict check may report that a segment is too long more often in DASH.\n\n\n  return Math.round(segmentDuration) > maxDuration + TIME_FUDGE_FACTOR;\n};\n\nvar getTroublesomeSegmentDurationMessage = function getTroublesomeSegmentDurationMessage(segmentInfo, sourceType) {\n  // Right now we aren't following DASH's timing model exactly, so only perform\n  // this check for HLS content.\n  if (sourceType !== 'hls') {\n    return null;\n  }\n\n  var segmentDuration = mediaDuration({\n    audioTimingInfo: segmentInfo.audioTimingInfo,\n    videoTimingInfo: segmentInfo.videoTimingInfo\n  }); // Don't report if we lack information.\n  //\n  // If the segment has a duration of 0 it is either a lack of information or a\n  // metadata only segment and shouldn't be reported here.\n\n  if (!segmentDuration) {\n    return null;\n  }\n\n  var targetDuration = segmentInfo.playlist.targetDuration;\n  var isSegmentWayTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration * 2\n  });\n  var isSegmentSlightlyTooLong = segmentTooLong({\n    segmentDuration: segmentDuration,\n    maxDuration: targetDuration\n  });\n  var segmentTooLongMessage = \"Segment with index \" + segmentInfo.mediaIndex + \" \" + (\"from playlist \" + segmentInfo.playlist.id + \" \") + (\"has a duration of \" + segmentDuration + \" \") + (\"when the reported duration is \" + segmentInfo.duration + \" \") + (\"and the target duration is \" + targetDuration + \". \") + 'For HLS content, a duration in excess of the target duration may result in ' + 'playback issues. See the HLS specification section on EXT-X-TARGETDURATION for ' + 'more details: ' + 'https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.3.1';\n\n  if (isSegmentWayTooLong || isSegmentSlightlyTooLong) {\n    return {\n      severity: isSegmentWayTooLong ? 'warn' : 'info',\n      message: segmentTooLongMessage\n    };\n  }\n\n  return null;\n};\n/**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar SegmentLoader = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SegmentLoader, _videojs$EventTarget);\n\n  function SegmentLoader(settings, options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // check pre-conditions\n\n    if (!settings) {\n      throw new TypeError('Initialization settings are required');\n    }\n\n    if (typeof settings.currentTime !== 'function') {\n      throw new TypeError('No currentTime getter specified');\n    }\n\n    if (!settings.mediaSource) {\n      throw new TypeError('No MediaSource specified');\n    } // public properties\n\n\n    _this.bandwidth = settings.bandwidth;\n    _this.throughput = {\n      rate: 0,\n      count: 0\n    };\n    _this.roundTrip = NaN;\n\n    _this.resetStats_();\n\n    _this.mediaIndex = null;\n    _this.partIndex = null; // private settings\n\n    _this.hasPlayed_ = settings.hasPlayed;\n    _this.currentTime_ = settings.currentTime;\n    _this.seekable_ = settings.seekable;\n    _this.seeking_ = settings.seeking;\n    _this.duration_ = settings.duration;\n    _this.mediaSource_ = settings.mediaSource;\n    _this.vhs_ = settings.vhs;\n    _this.loaderType_ = settings.loaderType;\n    _this.currentMediaInfo_ = void 0;\n    _this.startingMediaInfo_ = void 0;\n    _this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n    _this.goalBufferLength_ = settings.goalBufferLength;\n    _this.sourceType_ = settings.sourceType;\n    _this.sourceUpdater_ = settings.sourceUpdater;\n    _this.inbandTextTracks_ = settings.inbandTextTracks;\n    _this.state_ = 'INIT';\n    _this.timelineChangeController_ = settings.timelineChangeController;\n    _this.shouldSaveSegmentTimingInfo_ = true;\n    _this.parse708captions_ = settings.parse708captions;\n    _this.useDtsForTimestampOffset_ = settings.useDtsForTimestampOffset;\n    _this.captionServices_ = settings.captionServices;\n    _this.experimentalExactManifestTimings = settings.experimentalExactManifestTimings; // private instance variables\n\n    _this.checkBufferTimeout_ = null;\n    _this.error_ = void 0;\n    _this.currentTimeline_ = -1;\n    _this.pendingSegment_ = null;\n    _this.xhrOptions_ = null;\n    _this.pendingSegments_ = [];\n    _this.audioDisabled_ = false;\n    _this.isPendingTimestampOffset_ = false; // TODO possibly move gopBuffer and timeMapping info to a separate controller\n\n    _this.gopBuffer_ = [];\n    _this.timeMapping_ = 0;\n    _this.safeAppend_ = videojs.browser.IE_VERSION >= 11;\n    _this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    _this.playlistOfLastInitSegment_ = {\n      audio: null,\n      video: null\n    };\n    _this.callQueue_ = []; // If the segment loader prepares to load a segment, but does not have enough\n    // information yet to start the loading process (e.g., if the audio loader wants to\n    // load a segment from the next timeline but the main loader hasn't yet crossed that\n    // timeline), then the load call will be added to the queue until it is ready to be\n    // processed.\n\n    _this.loadQueue_ = [];\n    _this.metadataQueue_ = {\n      id3: [],\n      caption: []\n    };\n    _this.waitingOnRemove_ = false;\n    _this.quotaExceededErrorRetryTimeout_ = null; // Fragmented mp4 playback\n\n    _this.activeInitSegmentId_ = null;\n    _this.initSegments_ = {}; // HLSe playback\n\n    _this.cacheEncryptionKeys_ = settings.cacheEncryptionKeys;\n    _this.keyCache_ = {};\n    _this.decrypter_ = settings.decrypter; // Manages the tracking and generation of sync-points, mappings\n    // between a time in the display time and a segment index within\n    // a playlist\n\n    _this.syncController_ = settings.syncController;\n    _this.syncPoint_ = {\n      segmentIndex: 0,\n      time: 0\n    };\n    _this.transmuxer_ = _this.createTransmuxer_();\n\n    _this.triggerSyncInfoUpdate_ = function () {\n      return _this.trigger('syncinfoupdate');\n    };\n\n    _this.syncController_.on('syncinfoupdate', _this.triggerSyncInfoUpdate_);\n\n    _this.mediaSource_.addEventListener('sourceopen', function () {\n      if (!_this.isEndOfStream_()) {\n        _this.ended_ = false;\n      }\n    }); // ...for determining the fetch location\n\n\n    _this.fetchAtBuffer_ = false;\n    _this.logger_ = logger(\"SegmentLoader[\" + _this.loaderType_ + \"]\");\n    Object.defineProperty(_assertThisInitialized(_this), 'state', {\n      get: function get() {\n        return this.state_;\n      },\n      set: function set(newState) {\n        if (newState !== this.state_) {\n          this.logger_(this.state_ + \" -> \" + newState);\n          this.state_ = newState;\n          this.trigger('statechange');\n        }\n      }\n    });\n\n    _this.sourceUpdater_.on('ready', function () {\n      if (_this.hasEnoughInfoToAppend_()) {\n        _this.processCallQueue_();\n      }\n    }); // Only the main loader needs to listen for pending timeline changes, as the main\n    // loader should wait for audio to be ready to change its timeline so that both main\n    // and audio timelines change together. For more details, see the\n    // shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'main') {\n      _this.timelineChangeController_.on('pendingtimelinechange', function () {\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    } // The main loader only listens on pending timeline changes, but the audio loader,\n    // since its loads follow main, needs to listen on timeline changes. For more details,\n    // see the shouldWaitForTimelineChange function.\n\n\n    if (_this.loaderType_ === 'audio') {\n      _this.timelineChangeController_.on('timelinechange', function () {\n        if (_this.hasEnoughInfoToLoad_()) {\n          _this.processLoadQueue_();\n        }\n\n        if (_this.hasEnoughInfoToAppend_()) {\n          _this.processCallQueue_();\n        }\n      });\n    }\n\n    return _this;\n  }\n\n  var _proto = SegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    return segmentTransmuxer.createTransmuxer({\n      remux: false,\n      alignGopsAtEnd: this.safeAppend_,\n      keepOriginalTimestamps: true,\n      parse708captions: this.parse708captions_,\n      captionServices: this.captionServices_\n    });\n  }\n  /**\n   * reset all of our media stats\n   *\n   * @private\n   */\n  ;\n\n  _proto.resetStats_ = function resetStats_() {\n    this.mediaBytesTransferred = 0;\n    this.mediaRequests = 0;\n    this.mediaRequestsAborted = 0;\n    this.mediaRequestsTimedout = 0;\n    this.mediaRequestsErrored = 0;\n    this.mediaTransferDuration = 0;\n    this.mediaSecondsLoaded = 0;\n    this.mediaAppends = 0;\n  }\n  /**\n   * dispose of the SegmentLoader and reset to the default state\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.state = 'DISPOSED';\n    this.pause();\n    this.abort_();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.terminate();\n    }\n\n    this.resetStats_();\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    if (this.syncController_ && this.triggerSyncInfoUpdate_) {\n      this.syncController_.off('syncinfoupdate', this.triggerSyncInfoUpdate_);\n    }\n\n    this.off();\n  };\n\n  _proto.setAudio = function setAudio(enable) {\n    this.audioDisabled_ = !enable;\n\n    if (enable) {\n      this.appendInitSegment_.audio = true;\n    } else {\n      // remove current track audio if it gets disabled\n      this.sourceUpdater_.removeAudio(0, this.duration_());\n    }\n  }\n  /**\n   * abort anything that is currently doing on with the SegmentLoader\n   * and reset to a default state\n   */\n  ;\n\n  _proto.abort = function abort() {\n    if (this.state !== 'WAITING') {\n      if (this.pendingSegment_) {\n        this.pendingSegment_ = null;\n      }\n\n      return;\n    }\n\n    this.abort_(); // We aborted the requests we were waiting on, so reset the loader's state to READY\n    // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n    // when the request is aborted. This will prevent the loader from being stuck in the\n    // WAITING state indefinitely.\n\n    this.state = 'READY'; // don't wait for buffer check timeouts to begin fetching the\n    // next segment\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * abort all pending xhr requests and null any pending segements\n   *\n   * @private\n   */\n  ;\n\n  _proto.abort_ = function abort_() {\n    if (this.pendingSegment_ && this.pendingSegment_.abortRequests) {\n      this.pendingSegment_.abortRequests();\n    } // clear out the segment being processed\n\n\n    this.pendingSegment_ = null;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.timelineChangeController_.clearPendingTimelineChange(this.loaderType_);\n    this.waitingOnRemove_ = false;\n    window$1.clearTimeout(this.quotaExceededErrorRetryTimeout_);\n    this.quotaExceededErrorRetryTimeout_ = null;\n  };\n\n  _proto.checkForAbort_ = function checkForAbort_(requestId) {\n    // If the state is APPENDING, then aborts will not modify the state, meaning the first\n    // callback that happens should reset the state to READY so that loading can continue.\n    if (this.state === 'APPENDING' && !this.pendingSegment_) {\n      this.state = 'READY';\n      return true;\n    }\n\n    if (!this.pendingSegment_ || this.pendingSegment_.requestId !== requestId) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * set an error on the segment loader and null out any pending segements\n   *\n   * @param {Error} error the error to set on the SegmentLoader\n   * @return {Error} the error that was set or that is currently set\n   */\n  ;\n\n  _proto.error = function error(_error) {\n    if (typeof _error !== 'undefined') {\n      this.logger_('error occurred:', _error);\n      this.error_ = _error;\n    }\n\n    this.pendingSegment_ = null;\n    return this.error_;\n  };\n\n  _proto.endOfStream = function endOfStream() {\n    this.ended_ = true;\n\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.gopBuffer_.length = 0;\n    this.pause();\n    this.trigger('ended');\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    var trackInfo = this.getMediaInfo_();\n\n    if (!this.sourceUpdater_ || !trackInfo) {\n      return videojs.createTimeRanges();\n    }\n\n    if (this.loaderType_ === 'main') {\n      var hasAudio = trackInfo.hasAudio,\n          hasVideo = trackInfo.hasVideo,\n          isMuxed = trackInfo.isMuxed;\n\n      if (hasVideo && hasAudio && !this.audioDisabled_ && !isMuxed) {\n        return this.sourceUpdater_.buffered();\n      }\n\n      if (hasVideo) {\n        return this.sourceUpdater_.videoBuffered();\n      }\n    } // One case that can be ignored for now is audio only with alt audio,\n    // as we don't yet have proper support for that.\n\n\n    return this.sourceUpdater_.audioBuffered();\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: map.bytes,\n        tracks: map.tracks,\n        timescales: map.timescales\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Gets and sets key for the provided key\n   *\n   * @param {Object} key\n   *        The key object representing the key to get or set\n   * @param {boolean=} set\n   *        If true, the key for the provided key should be saved\n   * @return {Object}\n   *         Key object for desired key\n   */\n  ;\n\n  _proto.segmentKey = function segmentKey(key, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!key) {\n      return null;\n    }\n\n    var id = segmentKeyId(key);\n    var storedKey = this.keyCache_[id]; // TODO: We should use the HTTP Expires header to invalidate our cache per\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-6.2.3\n\n    if (this.cacheEncryptionKeys_ && set && !storedKey && key.bytes) {\n      this.keyCache_[id] = storedKey = {\n        resolvedUri: key.resolvedUri,\n        bytes: key.bytes\n      };\n    }\n\n    var result = {\n      resolvedUri: (storedKey || key).resolvedUri\n    };\n\n    if (storedKey) {\n      result.bytes = storedKey.bytes;\n    }\n\n    return result;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && !this.paused();\n  }\n  /**\n   * load a playlist and start to fill the buffer\n   */\n  ;\n\n  _proto.load = function load() {\n    // un-pause\n    this.monitorBuffer_(); // if we don't have a playlist yet, keep waiting for one to be\n    // specified\n\n    if (!this.playlist_) {\n      return;\n    } // if all the configuration is ready, initialize and begin loading\n\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    } // if we're in the middle of processing a segment already, don't\n    // kick off an additional segment request\n\n\n    if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n      return;\n    }\n\n    this.state = 'READY';\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY'; // if this is the audio segment loader, and it hasn't been inited before, then any old\n    // audio data from the muxed content should be removed\n\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * set a playlist on the segment loader\n   *\n   * @param {PlaylistLoader} media the playlist to set on the segment loader\n   */\n  ;\n\n  _proto.playlist = function playlist(newPlaylist, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    if (!newPlaylist) {\n      return;\n    }\n\n    var oldPlaylist = this.playlist_;\n    var segmentInfo = this.pendingSegment_;\n    this.playlist_ = newPlaylist;\n    this.xhrOptions_ = options; // when we haven't started playing yet, the start of a live playlist\n    // is always our zero-time so force a sync update each time the playlist\n    // is refreshed from the server\n    //\n    // Use the INIT state to determine if playback has started, as the playlist sync info\n    // should be fixed once requests begin (as sync points are generated based on sync\n    // info), but not before then.\n\n    if (this.state === 'INIT') {\n      newPlaylist.syncInfo = {\n        mediaSequence: newPlaylist.mediaSequence,\n        time: 0\n      }; // Setting the date time mapping means mapping the program date time (if available)\n      // to time 0 on the player's timeline. The playlist's syncInfo serves a similar\n      // purpose, mapping the initial mediaSequence to time zero. Since the syncInfo can\n      // be updated as the playlist is refreshed before the loader starts loading, the\n      // program date time mapping needs to be updated as well.\n      //\n      // This mapping is only done for the main loader because a program date time should\n      // map equivalently between playlists.\n\n      if (this.loaderType_ === 'main') {\n        this.syncController_.setDateTimeMappingForStart(newPlaylist);\n      }\n    }\n\n    var oldId = null;\n\n    if (oldPlaylist) {\n      if (oldPlaylist.id) {\n        oldId = oldPlaylist.id;\n      } else if (oldPlaylist.uri) {\n        oldId = oldPlaylist.uri;\n      }\n    }\n\n    this.logger_(\"playlist update [\" + oldId + \" => \" + (newPlaylist.id || newPlaylist.uri) + \"]\"); // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n    // in LIVE, we always want to update with new playlists (including refreshes)\n\n    this.trigger('syncinfoupdate'); // if we were unpaused but waiting for a playlist, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      return this.init_();\n    }\n\n    if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n      if (this.mediaIndex !== null) {\n        // we must reset/resync the segment loader when we switch renditions and\n        // the segment loader is already synced to the previous rendition\n        // on playlist changes we want it to be possible to fetch\n        // at the buffer for vod but not for live. So we use resetLoader\n        // for live and resyncLoader for vod. We want this because\n        // if a playlist uses independent and non-independent segments/parts the\n        // buffer may not accurately reflect the next segment that we should try\n        // downloading.\n        if (!newPlaylist.endList) {\n          this.resetLoader();\n        } else {\n          this.resyncLoader();\n        }\n      }\n\n      this.currentMediaInfo_ = void 0;\n      this.trigger('playlistupdate'); // the rest of this function depends on `oldPlaylist` being defined\n\n      return;\n    } // we reloaded the same playlist so we are in a live scenario\n    // and we will likely need to adjust the mediaIndex\n\n\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n    this.logger_(\"live window shift [\" + mediaSequenceDiff + \"]\"); // update the mediaIndex on the SegmentLoader\n    // this is important because we can abort a request and this value must be\n    // equal to the last appended mediaIndex\n\n    if (this.mediaIndex !== null) {\n      this.mediaIndex -= mediaSequenceDiff; // this can happen if we are going to load the first segment, but get a playlist\n      // update during that. mediaIndex would go from 0 to -1 if mediaSequence in the\n      // new playlist was incremented by 1.\n\n      if (this.mediaIndex < 0) {\n        this.mediaIndex = null;\n        this.partIndex = null;\n      } else {\n        var segment = this.playlist_.segments[this.mediaIndex]; // partIndex should remain the same for the same segment\n        // unless parts fell off of the playlist for this segment.\n        // In that case we need to reset partIndex and resync\n\n        if (this.partIndex && (!segment.parts || !segment.parts.length || !segment.parts[this.partIndex])) {\n          var mediaIndex = this.mediaIndex;\n          this.logger_(\"currently processing part (index \" + this.partIndex + \") no longer exists.\");\n          this.resetLoader(); // We want to throw away the partIndex and the data associated with it,\n          // as the part was dropped from our current playlists segment.\n          // The mediaIndex will still be valid so keep that around.\n\n          this.mediaIndex = mediaIndex;\n        }\n      }\n    } // update the mediaIndex on the SegmentInfo object\n    // this is important because we will update this.mediaIndex with this value\n    // in `handleAppendsDone_` after the segment has been successfully appended\n\n\n    if (segmentInfo) {\n      segmentInfo.mediaIndex -= mediaSequenceDiff;\n\n      if (segmentInfo.mediaIndex < 0) {\n        segmentInfo.mediaIndex = null;\n        segmentInfo.partIndex = null;\n      } else {\n        // we need to update the referenced segment so that timing information is\n        // saved for the new playlist's segment, however, if the segment fell off the\n        // playlist, we can leave the old reference and just lose the timing info\n        if (segmentInfo.mediaIndex >= 0) {\n          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n        }\n\n        if (segmentInfo.partIndex >= 0 && segmentInfo.segment.parts) {\n          segmentInfo.part = segmentInfo.segment.parts[segmentInfo.partIndex];\n        }\n      }\n    }\n\n    this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n  }\n  /**\n   * Prevent the loader from fetching additional segments. If there\n   * is a segment request outstanding, it will finish processing\n   * before the loader halts. A segment loader can be unpaused by\n   * calling load().\n   */\n  ;\n\n  _proto.pause = function pause() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n      this.checkBufferTimeout_ = null;\n    }\n  }\n  /**\n   * Returns whether the segment loader is fetching additional\n   * segments when given the opportunity. This property can be\n   * modified through calls to pause() and load().\n   */\n  ;\n\n  _proto.paused = function paused() {\n    return this.checkBufferTimeout_ === null;\n  }\n  /**\n   * Delete all the buffered data and reset the SegmentLoader\n   *\n   * @param {Function} [done] an optional callback to be executed when the remove\n   * operation is complete\n   */\n  ;\n\n  _proto.resetEverything = function resetEverything(done) {\n    this.ended_ = false;\n    this.activeInitSegmentId_ = null;\n    this.appendInitSegment_ = {\n      audio: true,\n      video: true\n    };\n    this.resetLoader(); // remove from 0, the earliest point, to Infinity, to signify removal of everything.\n    // VTT Segment Loader doesn't need to do anything but in the regular SegmentLoader,\n    // we then clamp the value to duration if necessary.\n\n    this.remove(0, Infinity, done); // clears fmp4 captions\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearAllMp4Captions'\n      }); // reset the cache in the transmuxer\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n    }\n  }\n  /**\n   * Force the SegmentLoader to resync and start loading around the currentTime instead\n   * of starting at the end of the buffer\n   *\n   * Useful for fast quality changes\n   */\n  ;\n\n  _proto.resetLoader = function resetLoader() {\n    this.fetchAtBuffer_ = false;\n    this.resyncLoader();\n  }\n  /**\n   * Force the SegmentLoader to restart synchronization and make a conservative guess\n   * before returning to the simple walk-forward method\n   */\n  ;\n\n  _proto.resyncLoader = function resyncLoader() {\n    if (this.transmuxer_) {\n      // need to clear out any cached data to prepare for the new segment\n      segmentTransmuxer.reset(this.transmuxer_);\n    }\n\n    this.mediaIndex = null;\n    this.partIndex = null;\n    this.syncPoint_ = null;\n    this.isPendingTimestampOffset_ = false;\n    this.callQueue_ = [];\n    this.loadQueue_ = [];\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n    this.abort();\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   * @param {Function} [done] - an optional callback to be executed when the remove\n   * @param {boolean} force - force all remove operations to happen\n   * operation is complete\n   */\n  ;\n\n  _proto.remove = function remove(start, end, done, force) {\n    if (done === void 0) {\n      done = function done() {};\n    }\n\n    if (force === void 0) {\n      force = false;\n    } // clamp end to duration if we need to remove everything.\n    // This is due to a browser bug that causes issues if we remove to Infinity.\n    // videojs/videojs-contrib-hls#1225\n\n\n    if (end === Infinity) {\n      end = this.duration_();\n    } // skip removes that would throw an error\n    // commonly happens during a rendition switch at the start of a video\n    // from start 0 to end 0\n\n\n    if (end <= start) {\n      this.logger_('skipping remove because end ${end} is <= start ${start}');\n      return;\n    }\n\n    if (!this.sourceUpdater_ || !this.getMediaInfo_()) {\n      this.logger_('skipping remove because no source updater or starting media info'); // nothing to remove if we haven't processed any media\n\n      return;\n    } // set it to one to complete this function's removes\n\n\n    var removesRemaining = 1;\n\n    var removeFinished = function removeFinished() {\n      removesRemaining--;\n\n      if (removesRemaining === 0) {\n        done();\n      }\n    };\n\n    if (force || !this.audioDisabled_) {\n      removesRemaining++;\n      this.sourceUpdater_.removeAudio(start, end, removeFinished);\n    } // While it would be better to only remove video if the main loader has video, this\n    // should be safe with audio only as removeVideo will call back even if there's no\n    // video buffer.\n    //\n    // In theory we can check to see if there's video before calling the remove, but in\n    // the event that we're switching between renditions and from video to audio only\n    // (when we add support for that), we may need to clear the video contents despite\n    // what the new media will contain.\n\n\n    if (force || this.loaderType_ === 'main') {\n      this.gopBuffer_ = removeGopBuffer(this.gopBuffer_, start, end, this.timeMapping_);\n      removesRemaining++;\n      this.sourceUpdater_.removeVideo(start, end, removeFinished);\n    } // remove any captions and ID3 tags\n\n\n    for (var track in this.inbandTextTracks_) {\n      removeCuesFromTrack(start, end, this.inbandTextTracks_[track]);\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_); // finished this function's removes\n\n    removeFinished();\n  }\n  /**\n   * (re-)schedule monitorBufferTick_ to run as soon as possible\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBuffer_ = function monitorBuffer_() {\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), 1);\n  }\n  /**\n   * As long as the SegmentLoader is in the READY state, periodically\n   * invoke fillBuffer_().\n   *\n   * @private\n   */\n  ;\n\n  _proto.monitorBufferTick_ = function monitorBufferTick_() {\n    if (this.state === 'READY') {\n      this.fillBuffer_();\n    }\n\n    if (this.checkBufferTimeout_) {\n      window$1.clearTimeout(this.checkBufferTimeout_);\n    }\n\n    this.checkBufferTimeout_ = window$1.setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    // TODO since the source buffer maintains a queue, and we shouldn't call this function\n    // except when we're ready for the next segment, this check can most likely be removed\n    if (this.sourceUpdater_.updating()) {\n      return;\n    } // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      this.isPendingTimestampOffset_ = false;\n      this.timelineChangeController_.pendingTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      });\n    }\n\n    this.loadSegment_(segmentInfo);\n  }\n  /**\n   * Determines if we should call endOfStream on the media source based\n   * on the state of the buffer or if appened segment was the final\n   * segment in the playlist.\n   *\n   * @param {number} [mediaIndex] the media index of segment we last appended\n   * @param {Object} [playlist] a media playlist object\n   * @return {boolean} do we need to call endOfStream on the MediaSource\n   */\n  ;\n\n  _proto.isEndOfStream_ = function isEndOfStream_(mediaIndex, playlist, partIndex) {\n    if (mediaIndex === void 0) {\n      mediaIndex = this.mediaIndex;\n    }\n\n    if (playlist === void 0) {\n      playlist = this.playlist_;\n    }\n\n    if (partIndex === void 0) {\n      partIndex = this.partIndex;\n    }\n\n    if (!playlist || !this.mediaSource_) {\n      return false;\n    }\n\n    var segment = typeof mediaIndex === 'number' && playlist.segments[mediaIndex]; // mediaIndex is zero based but length is 1 based\n\n    var appendedLastSegment = mediaIndex + 1 === playlist.segments.length; // true if there are no parts, or this is the last part.\n\n    var appendedLastPart = !segment || !segment.parts || partIndex + 1 === segment.parts.length; // if we've buffered to the end of the video, we need to call endOfStream\n    // so that MediaSources can trigger the `ended` event when it runs out of\n    // buffered data instead of waiting for me\n\n    return playlist.endList && this.mediaSource_.readyState === 'open' && appendedLastSegment && appendedLastPart;\n  }\n  /**\n   * Determines what request should be made given current segment loader state.\n   *\n   * @return {Object} a request object that describes the segment/part to load\n   */\n  ;\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    var buffered = this.buffered_();\n    var bufferedEnd = lastBufferedEnd(buffered) || 0;\n    var bufferedTime = timeAheadOf(buffered, this.currentTime_());\n    var preloaded = !this.hasPlayed_() && bufferedTime >= 1;\n    var haveEnoughBuffer = bufferedTime >= this.goalBufferLength_();\n    var segments = this.playlist_.segments; // return no segment if:\n    // 1. we don't have segments\n    // 2. The video has not yet played and we already downloaded a segment\n    // 3. we already have enough buffered time\n\n    if (!segments.length || preloaded || haveEnoughBuffer) {\n      return null;\n    }\n\n    this.syncPoint_ = this.syncPoint_ || this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n    var next = {\n      partIndex: null,\n      mediaIndex: null,\n      startOfSegment: null,\n      playlist: this.playlist_,\n      isSyncRequest: Boolean(!this.syncPoint_)\n    };\n\n    if (next.isSyncRequest) {\n      next.mediaIndex = getSyncSegmentCandidate(this.currentTimeline_, segments, bufferedEnd);\n    } else if (this.mediaIndex !== null) {\n      var segment = segments[this.mediaIndex];\n      var partIndex = typeof this.partIndex === 'number' ? this.partIndex : -1;\n      next.startOfSegment = segment.end ? segment.end : bufferedEnd;\n\n      if (segment.parts && segment.parts[partIndex + 1]) {\n        next.mediaIndex = this.mediaIndex;\n        next.partIndex = partIndex + 1;\n      } else {\n        next.mediaIndex = this.mediaIndex + 1;\n      }\n    } else {\n      // Find the segment containing the end of the buffer or current time.\n      var _Playlist$getMediaInf = Playlist.getMediaInfoForTime({\n        experimentalExactManifestTimings: this.experimentalExactManifestTimings,\n        playlist: this.playlist_,\n        currentTime: this.fetchAtBuffer_ ? bufferedEnd : this.currentTime_(),\n        startingPartIndex: this.syncPoint_.partIndex,\n        startingSegmentIndex: this.syncPoint_.segmentIndex,\n        startTime: this.syncPoint_.time\n      }),\n          segmentIndex = _Playlist$getMediaInf.segmentIndex,\n          startTime = _Playlist$getMediaInf.startTime,\n          _partIndex = _Playlist$getMediaInf.partIndex;\n\n      next.getMediaInfoForTime = this.fetchAtBuffer_ ? \"bufferedEnd \" + bufferedEnd : \"currentTime \" + this.currentTime_();\n      next.mediaIndex = segmentIndex;\n      next.startOfSegment = startTime;\n      next.partIndex = _partIndex;\n    }\n\n    var nextSegment = segments[next.mediaIndex];\n    var nextPart = nextSegment && typeof next.partIndex === 'number' && nextSegment.parts && nextSegment.parts[next.partIndex]; // if the next segment index is invalid or\n    // the next partIndex is invalid do not choose a next segment.\n\n    if (!nextSegment || typeof next.partIndex === 'number' && !nextPart) {\n      return null;\n    } // if the next segment has parts, and we don't have a partIndex.\n    // Set partIndex to 0\n\n\n    if (typeof next.partIndex !== 'number' && nextSegment.parts) {\n      next.partIndex = 0;\n      nextPart = nextSegment.parts[0];\n    } // if we have no buffered data then we need to make sure\n    // that the next part we append is \"independent\" if possible.\n    // So we check if the previous part is independent, and request\n    // it if it is.\n\n\n    if (!bufferedTime && nextPart && !nextPart.independent) {\n      if (next.partIndex === 0) {\n        var lastSegment = segments[next.mediaIndex - 1];\n        var lastSegmentLastPart = lastSegment.parts && lastSegment.parts.length && lastSegment.parts[lastSegment.parts.length - 1];\n\n        if (lastSegmentLastPart && lastSegmentLastPart.independent) {\n          next.mediaIndex -= 1;\n          next.partIndex = lastSegment.parts.length - 1;\n          next.independent = 'previous segment';\n        }\n      } else if (nextSegment.parts[next.partIndex - 1].independent) {\n        next.partIndex -= 1;\n        next.independent = 'previous part';\n      }\n    }\n\n    var ended = this.mediaSource_ && this.mediaSource_.readyState === 'ended'; // do not choose a next segment if all of the following:\n    // 1. this is the last segment in the playlist\n    // 2. end of stream has been called on the media source already\n    // 3. the player is not seeking\n\n    if (next.mediaIndex >= segments.length - 1 && ended && !this.seeking_()) {\n      return null;\n    }\n\n    return this.generateSegmentInfo_(next);\n  };\n\n  _proto.generateSegmentInfo_ = function generateSegmentInfo_(options) {\n    var independent = options.independent,\n        playlist = options.playlist,\n        mediaIndex = options.mediaIndex,\n        startOfSegment = options.startOfSegment,\n        isSyncRequest = options.isSyncRequest,\n        partIndex = options.partIndex,\n        forceTimestampOffset = options.forceTimestampOffset,\n        getMediaInfoForTime = options.getMediaInfoForTime;\n    var segment = playlist.segments[mediaIndex];\n    var part = typeof partIndex === 'number' && segment.parts[partIndex];\n    var segmentInfo = {\n      requestId: 'segment-loader-' + Math.random(),\n      // resolve the segment URL relative to the playlist\n      uri: part && part.resolvedUri || segment.resolvedUri,\n      // the segment's mediaIndex at the time it was requested\n      mediaIndex: mediaIndex,\n      partIndex: part ? partIndex : null,\n      // whether or not to update the SegmentLoader's state with this\n      // segment's mediaIndex\n      isSyncRequest: isSyncRequest,\n      startOfSegment: startOfSegment,\n      // the segment's playlist\n      playlist: playlist,\n      // unencrypted bytes of the segment\n      bytes: null,\n      // when a key is defined for this segment, the encrypted bytes\n      encryptedBytes: null,\n      // The target timestampOffset for this segment when we append it\n      // to the source buffer\n      timestampOffset: null,\n      // The timeline that the segment is in\n      timeline: segment.timeline,\n      // The expected duration of the segment in seconds\n      duration: part && part.duration || segment.duration,\n      // retain the segment in case the playlist updates while doing an async process\n      segment: segment,\n      part: part,\n      byteLength: 0,\n      transmuxer: this.transmuxer_,\n      // type of getMediaInfoForTime that was used to get this segment\n      getMediaInfoForTime: getMediaInfoForTime,\n      independent: independent\n    };\n    var overrideCheck = typeof forceTimestampOffset !== 'undefined' ? forceTimestampOffset : this.isPendingTimestampOffset_;\n    segmentInfo.timestampOffset = this.timestampOffsetForSegment_({\n      segmentTimeline: segment.timeline,\n      currentTimeline: this.currentTimeline_,\n      startOfSegment: startOfSegment,\n      buffered: this.buffered_(),\n      overrideCheck: overrideCheck\n    });\n    var audioBufferedEnd = lastBufferedEnd(this.sourceUpdater_.audioBuffered());\n\n    if (typeof audioBufferedEnd === 'number') {\n      // since the transmuxer is using the actual timing values, but the buffer is\n      // adjusted by the timestamp offset, we must adjust the value here\n      segmentInfo.audioAppendStart = audioBufferedEnd - this.sourceUpdater_.audioTimestampOffset();\n    }\n\n    if (this.sourceUpdater_.videoBuffered().length) {\n      segmentInfo.gopsToAlignWith = gopsSafeToAlignWith(this.gopBuffer_, // since the transmuxer is using the actual timing values, but the time is\n      // adjusted by the timestmap offset, we must adjust the value here\n      this.currentTime_() - this.sourceUpdater_.videoTimestampOffset(), this.timeMapping_);\n    }\n\n    return segmentInfo;\n  } // get the timestampoffset for a segment,\n  // added so that vtt segment loader can override and prevent\n  // adding timestamp offsets.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_(options) {\n    return timestampOffsetForSegment(options);\n  }\n  /**\n   * Determines if the network has enough bandwidth to complete the current segment\n   * request in a timely manner. If not, the request will be aborted early and bandwidth\n   * updated to trigger a playlist switch.\n   *\n   * @param {Object} stats\n   *        Object containing stats about the request timing and size\n   * @private\n   */\n  ;\n\n  _proto.earlyAbortWhenNeeded_ = function earlyAbortWhenNeeded_(stats) {\n    if (this.vhs_.tech_.paused() || // Don't abort if the current playlist is on the lowestEnabledRendition\n    // TODO: Replace using timeout with a boolean indicating whether this playlist is\n    //       the lowestEnabledRendition.\n    !this.xhrOptions_.timeout || // Don't abort if we have no bandwidth information to estimate segment sizes\n    !this.playlist_.attributes.BANDWIDTH) {\n      return;\n    } // Wait at least 1 second since the first byte of data has been received before\n    // using the calculated bandwidth from the progress event to allow the bitrate\n    // to stabilize\n\n\n    if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n      return;\n    }\n\n    var currentTime = this.currentTime_();\n    var measuredBandwidth = stats.bandwidth;\n    var segmentDuration = this.pendingSegment_.duration;\n    var requestTimeRemaining = Playlist.estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived); // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n    // if we are only left with less than 1 second when the request completes.\n    // A negative timeUntilRebuffering indicates we are already rebuffering\n\n    var timeUntilRebuffer$1 = timeUntilRebuffer(this.buffered_(), currentTime, this.vhs_.tech_.playbackRate()) - 1; // Only consider aborting early if the estimated time to finish the download\n    // is larger than the estimated time until the player runs out of forward buffer\n\n    if (requestTimeRemaining <= timeUntilRebuffer$1) {\n      return;\n    }\n\n    var switchCandidate = minRebufferMaxBandwidthSelector({\n      master: this.vhs_.playlists.master,\n      currentTime: currentTime,\n      bandwidth: measuredBandwidth,\n      duration: this.duration_(),\n      segmentDuration: segmentDuration,\n      timeUntilRebuffer: timeUntilRebuffer$1,\n      currentTimeline: this.currentTimeline_,\n      syncController: this.syncController_\n    });\n\n    if (!switchCandidate) {\n      return;\n    }\n\n    var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer$1;\n    var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n    var minimumTimeSaving = 0.5; // If we are already rebuffering, increase the amount of variance we add to the\n    // potential round trip time of the new request so that we are not too aggressive\n    // with switching to a playlist that might save us a fraction of a second.\n\n    if (timeUntilRebuffer$1 <= TIME_FUDGE_FACTOR) {\n      minimumTimeSaving = 1;\n    }\n\n    if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n      return;\n    } // set the bandwidth to that of the desired playlist being sure to scale by\n    // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n    // don't trigger a bandwidthupdate as the bandwidth is artifial\n\n\n    this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * Config.BANDWIDTH_VARIANCE + 1;\n    this.trigger('earlyabort');\n  };\n\n  _proto.handleAbort_ = function handleAbort_(segmentInfo) {\n    this.logger_(\"Aborting \" + segmentInfoString(segmentInfo));\n    this.mediaRequestsAborted += 1;\n  }\n  /**\n   * XHR `progress` event handler\n   *\n   * @param {Event}\n   *        The XHR `progress` event\n   * @param {Object} simpleSegment\n   *        A simplified segment object copy\n   * @private\n   */\n  ;\n\n  _proto.handleProgress_ = function handleProgress_(event, simpleSegment) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    this.trigger('progress');\n  };\n\n  _proto.handleTrackInfo_ = function handleTrackInfo_(simpleSegment, trackInfo) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    if (this.checkForIllegalMediaSwitch(trackInfo)) {\n      return;\n    }\n\n    trackInfo = trackInfo || {}; // When we have track info, determine what media types this loader is dealing with.\n    // Guard against cases where we're not getting track info at all until we are\n    // certain that all streams will provide it.\n\n    if (!shallowEqual(this.currentMediaInfo_, trackInfo)) {\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n      this.startingMediaInfo_ = trackInfo;\n      this.currentMediaInfo_ = trackInfo;\n      this.logger_('trackinfo update', trackInfo);\n      this.trigger('trackinfo');\n    } // trackinfo may cause an abort if the trackinfo\n    // causes a codec change to an unsupported codec.\n\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // set trackinfo on the pending segment so that\n    // it can append.\n\n\n    this.pendingSegment_.trackInfo = trackInfo; // check if any calls were waiting on the track info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleTimingInfo_ = function handleTimingInfo_(simpleSegment, mediaType, timeType, time) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var timingInfoProperty = timingInfoPropertyForMedia(mediaType);\n    segmentInfo[timingInfoProperty] = segmentInfo[timingInfoProperty] || {};\n    segmentInfo[timingInfoProperty][timeType] = time;\n    this.logger_(\"timinginfo: \" + mediaType + \" - \" + timeType + \" - \" + time); // check if any calls were waiting on the timing info\n\n    if (this.hasEnoughInfoToAppend_()) {\n      this.processCallQueue_();\n    }\n  };\n\n  _proto.handleCaptions_ = function handleCaptions_(simpleSegment, captionData) {\n    var _this2 = this;\n\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // This could only happen with fmp4 segments, but\n    // should still not happen in general\n\n\n    if (captionData.length === 0) {\n      this.logger_('SegmentLoader received no captions from a caption event');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Wait until we have some video data so that caption timing\n    // can be adjusted by the timestamp offset\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.caption.push(this.handleCaptions_.bind(this, simpleSegment, captionData));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset();\n    var captionTracks = {}; // get total start/end and captions for each track/stream\n\n    captionData.forEach(function (caption) {\n      // caption.stream is actually a track name...\n      // set to the existing values in tracks or default values\n      captionTracks[caption.stream] = captionTracks[caption.stream] || {\n        // Infinity, as any other value will be less than this\n        startTime: Infinity,\n        captions: [],\n        // 0 as an other value will be more than this\n        endTime: 0\n      };\n      var captionTrack = captionTracks[caption.stream];\n      captionTrack.startTime = Math.min(captionTrack.startTime, caption.startTime + timestampOffset);\n      captionTrack.endTime = Math.max(captionTrack.endTime, caption.endTime + timestampOffset);\n      captionTrack.captions.push(caption);\n    });\n    Object.keys(captionTracks).forEach(function (trackName) {\n      var _captionTracks$trackN = captionTracks[trackName],\n          startTime = _captionTracks$trackN.startTime,\n          endTime = _captionTracks$trackN.endTime,\n          captions = _captionTracks$trackN.captions;\n      var inbandTextTracks = _this2.inbandTextTracks_;\n\n      _this2.logger_(\"adding cues from \" + startTime + \" -> \" + endTime + \" for \" + trackName);\n\n      createCaptionsTrackIfNotExists(inbandTextTracks, _this2.vhs_.tech_, trackName); // clear out any cues that start and end at the same time period for the same track.\n      // We do this because a rendition change that also changes the timescale for captions\n      // will result in captions being re-parsed for certain segments. If we add them again\n      // without clearing we will have two of the same captions visible.\n\n      removeCuesFromTrack(startTime, endTime, inbandTextTracks[trackName]);\n      addCaptionData({\n        captionArray: captions,\n        inbandTextTracks: inbandTextTracks,\n        timestampOffset: timestampOffset\n      });\n    }); // Reset stored captions since we added parsed\n    // captions to a text track at this point\n\n    if (this.transmuxer_) {\n      this.transmuxer_.postMessage({\n        action: 'clearParsedMp4Captions'\n      });\n    }\n  };\n\n  _proto.handleId3_ = function handleId3_(simpleSegment, id3Frames, dispatchType) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // we need to have appended data in order for the timestamp offset to be set\n\n    if (!segmentInfo.hasAppendedData_) {\n      this.metadataQueue_.id3.push(this.handleId3_.bind(this, simpleSegment, id3Frames, dispatchType));\n      return;\n    }\n\n    var timestampOffset = this.sourceUpdater_.videoTimestampOffset() === null ? this.sourceUpdater_.audioTimestampOffset() : this.sourceUpdater_.videoTimestampOffset(); // There's potentially an issue where we could double add metadata if there's a muxed\n    // audio/video source with a metadata track, and an alt audio with a metadata track.\n    // However, this probably won't happen, and if it does it can be handled then.\n\n    createMetadataTrackIfNotExists(this.inbandTextTracks_, dispatchType, this.vhs_.tech_);\n    addMetadata({\n      inbandTextTracks: this.inbandTextTracks_,\n      metadataArray: id3Frames,\n      timestampOffset: timestampOffset,\n      videoDuration: this.duration_()\n    });\n  };\n\n  _proto.processMetadataQueue_ = function processMetadataQueue_() {\n    this.metadataQueue_.id3.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.caption.forEach(function (fn) {\n      return fn();\n    });\n    this.metadataQueue_.id3 = [];\n    this.metadataQueue_.caption = [];\n  };\n\n  _proto.processCallQueue_ = function processCallQueue_() {\n    var callQueue = this.callQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.callQueue_ = [];\n    callQueue.forEach(function (fun) {\n      return fun();\n    });\n  };\n\n  _proto.processLoadQueue_ = function processLoadQueue_() {\n    var loadQueue = this.loadQueue_; // Clear out the queue before the queued functions are run, since some of the\n    // functions may check the length of the load queue and default to pushing themselves\n    // back onto the queue.\n\n    this.loadQueue_ = [];\n    loadQueue.forEach(function (fun) {\n      return fun();\n    });\n  }\n  /**\n   * Determines whether the loader has enough info to load the next segment.\n   *\n   * @return {boolean}\n   *         Whether or not the loader has enough info to load the next segment\n   */\n  ;\n\n  _proto.hasEnoughInfoToLoad_ = function hasEnoughInfoToLoad_() {\n    // Since primary timing goes by video, only the audio loader potentially needs to wait\n    // to load.\n    if (this.loaderType_ !== 'audio') {\n      return true;\n    }\n\n    var segmentInfo = this.pendingSegment_; // A fill buffer must have already run to establish a pending segment before there's\n    // enough info to load.\n\n    if (!segmentInfo) {\n      return false;\n    } // The first segment can and should be loaded immediately so that source buffers are\n    // created together (before appending). Source buffer creation uses the presence of\n    // audio and video data to determine whether to create audio/video source buffers, and\n    // uses processed (transmuxed or parsed) media to determine the types required.\n\n\n    if (!this.getCurrentMediaInfo_()) {\n      return true;\n    }\n\n    if ( // Technically, instead of waiting to load a segment on timeline changes, a segment\n    // can be requested and downloaded and only wait before it is transmuxed or parsed.\n    // But in practice, there are a few reasons why it is better to wait until a loader\n    // is ready to append that segment before requesting and downloading:\n    //\n    // 1. Because audio and main loaders cross discontinuities together, if this loader\n    //    is waiting for the other to catch up, then instead of requesting another\n    //    segment and using up more bandwidth, by not yet loading, more bandwidth is\n    //    allotted to the loader currently behind.\n    // 2. media-segment-request doesn't have to have logic to consider whether a segment\n    // is ready to be processed or not, isolating the queueing behavior to the loader.\n    // 3. The audio loader bases some of its segment properties on timing information\n    //    provided by the main loader, meaning that, if the logic for waiting on\n    //    processing was in media-segment-request, then it would also need to know how\n    //    to re-generate the segment information after the main loader caught up.\n    shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCurrentMediaInfo_ = function getCurrentMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return segmentInfo && segmentInfo.trackInfo || this.currentMediaInfo_;\n  };\n\n  _proto.getMediaInfo_ = function getMediaInfo_(segmentInfo) {\n    if (segmentInfo === void 0) {\n      segmentInfo = this.pendingSegment_;\n    }\n\n    return this.getCurrentMediaInfo_(segmentInfo) || this.startingMediaInfo_;\n  };\n\n  _proto.getPendingSegmentPlaylist = function getPendingSegmentPlaylist() {\n    return this.pendingSegment_ ? this.pendingSegment_.playlist : null;\n  };\n\n  _proto.hasEnoughInfoToAppend_ = function hasEnoughInfoToAppend_() {\n    if (!this.sourceUpdater_.ready()) {\n      return false;\n    } // If content needs to be removed or the loader is waiting on an append reattempt,\n    // then no additional content should be appended until the prior append is resolved.\n\n\n    if (this.waitingOnRemove_ || this.quotaExceededErrorRetryTimeout_) {\n      return false;\n    }\n\n    var segmentInfo = this.pendingSegment_;\n    var trackInfo = this.getCurrentMediaInfo_(); // no segment to append any data for or\n    // we do not have information on this specific\n    // segment yet\n\n    if (!segmentInfo || !trackInfo) {\n      return false;\n    }\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n\n    if (hasVideo && !segmentInfo.videoTimingInfo) {\n      return false;\n    } // muxed content only relies on video timing information for now.\n\n\n    if (hasAudio && !this.audioDisabled_ && !isMuxed && !segmentInfo.audioTimingInfo) {\n      return false;\n    }\n\n    if (shouldWaitForTimelineChange({\n      timelineChangeController: this.timelineChangeController_,\n      currentTimeline: this.currentTimeline_,\n      segmentTimeline: segmentInfo.timeline,\n      loaderType: this.loaderType_,\n      audioDisabled: this.audioDisabled_\n    })) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.handleData_ = function handleData_(simpleSegment, result) {\n    this.earlyAbortWhenNeeded_(simpleSegment.stats);\n\n    if (this.checkForAbort_(simpleSegment.requestId)) {\n      return;\n    } // If there's anything in the call queue, then this data came later and should be\n    // executed after the calls currently queued.\n\n\n    if (this.callQueue_.length || !this.hasEnoughInfoToAppend_()) {\n      this.callQueue_.push(this.handleData_.bind(this, simpleSegment, result));\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // update the time mapping so we can translate from display time to media time\n\n    this.setTimeMapping_(segmentInfo.timeline); // for tracking overall stats\n\n    this.updateMediaSecondsLoaded_(segmentInfo.part || segmentInfo.segment); // Note that the state isn't changed from loading to appending. This is because abort\n    // logic may change behavior depending on the state, and changing state too early may\n    // inflate our estimates of bandwidth. In the future this should be re-examined to\n    // note more granular states.\n    // don't process and append data if the mediaSource is closed\n\n    if (this.mediaSource_.readyState === 'closed') {\n      return;\n    } // if this request included an initialization segment, save that data\n    // to the initSegment cache\n\n\n    if (simpleSegment.map) {\n      simpleSegment.map = this.initSegmentForMap(simpleSegment.map, true); // move over init segment properties to media request\n\n      segmentInfo.segment.map = simpleSegment.map;\n    } // if this request included a segment key, save that data in the cache\n\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    segmentInfo.isFmp4 = simpleSegment.isFmp4;\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n\n    if (segmentInfo.isFmp4) {\n      this.trigger('fmp4');\n      segmentInfo.timingInfo.start = segmentInfo[timingInfoPropertyForMedia(result.type)].start;\n    } else {\n      var trackInfo = this.getCurrentMediaInfo_();\n      var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n      var firstVideoFrameTimeForData;\n\n      if (useVideoTimingInfo) {\n        firstVideoFrameTimeForData = segmentInfo.videoTimingInfo.start;\n      } // Segment loader knows more about segment timing than the transmuxer (in certain\n      // aspects), so make any changes required for a more accurate start time.\n      // Don't set the end time yet, as the segment may not be finished processing.\n\n\n      segmentInfo.timingInfo.start = this.trueSegmentStart_({\n        currentStart: segmentInfo.timingInfo.start,\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex,\n        currentVideoTimestampOffset: this.sourceUpdater_.videoTimestampOffset(),\n        useVideoTimingInfo: useVideoTimingInfo,\n        firstVideoFrameTimeForData: firstVideoFrameTimeForData,\n        videoTimingInfo: segmentInfo.videoTimingInfo,\n        audioTimingInfo: segmentInfo.audioTimingInfo\n      });\n    } // Init segments for audio and video only need to be appended in certain cases. Now\n    // that data is about to be appended, we can check the final cases to determine\n    // whether we should append an init segment.\n\n\n    this.updateAppendInitSegmentStatus(segmentInfo, result.type); // Timestamp offset should be updated once we get new data and have its timing info,\n    // as we use the start of the segment to offset the best guess (playlist provided)\n    // timestamp offset.\n\n    this.updateSourceBufferTimestampOffset_(segmentInfo); // if this is a sync request we need to determine whether it should\n    // be appended or not.\n\n    if (segmentInfo.isSyncRequest) {\n      // first save/update our timing info for this segment.\n      // this is what allows us to choose an accurate segment\n      // and the main reason we make a sync request.\n      this.updateTimingInfoEnd_(segmentInfo);\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n      var next = this.chooseNextRequest_(); // If the sync request isn't the segment that would be requested next\n      // after taking into account its timing info, do not append it.\n\n      if (next.mediaIndex !== segmentInfo.mediaIndex || next.partIndex !== segmentInfo.partIndex) {\n        this.logger_('sync segment was incorrect, not appending');\n        return;\n      } // otherwise append it like any other segment as our guess was correct.\n\n\n      this.logger_('sync segment was correct, appending');\n    } // Save some state so that in the future anything waiting on first append (and/or\n    // timestamp offset(s)) can process immediately. While the extra state isn't optimal,\n    // we need some notion of whether the timestamp offset or other relevant information\n    // has had a chance to be set.\n\n\n    segmentInfo.hasAppendedData_ = true; // Now that the timestamp offset should be set, we can append any waiting ID3 tags.\n\n    this.processMetadataQueue_();\n    this.appendData_(segmentInfo, result);\n  };\n\n  _proto.updateAppendInitSegmentStatus = function updateAppendInitSegmentStatus(segmentInfo, type) {\n    // alt audio doesn't manage timestamp offset\n    if (this.loaderType_ === 'main' && typeof segmentInfo.timestampOffset === 'number' && // in the case that we're handling partial data, we don't want to append an init\n    // segment for each chunk\n    !segmentInfo.changedTimestampOffset) {\n      // if the timestamp offset changed, the timeline may have changed, so we have to re-\n      // append init segments\n      this.appendInitSegment_ = {\n        audio: true,\n        video: true\n      };\n    }\n\n    if (this.playlistOfLastInitSegment_[type] !== segmentInfo.playlist) {\n      // make sure we append init segment on playlist changes, in case the media config\n      // changed\n      this.appendInitSegment_[type] = true;\n    }\n  };\n\n  _proto.getInitSegmentAndUpdateState_ = function getInitSegmentAndUpdateState_(_ref4) {\n    var type = _ref4.type,\n        initSegment = _ref4.initSegment,\n        map = _ref4.map,\n        playlist = _ref4.playlist; // \"The EXT-X-MAP tag specifies how to obtain the Media Initialization Section\n    // (Section 3) required to parse the applicable Media Segments.  It applies to every\n    // Media Segment that appears after it in the Playlist until the next EXT-X-MAP tag\n    // or until the end of the playlist.\"\n    // https://tools.ietf.org/html/draft-pantos-http-live-streaming-23#section-4.3.2.5\n\n    if (map) {\n      var id = initSegmentId(map);\n\n      if (this.activeInitSegmentId_ === id) {\n        // don't need to re-append the init segment if the ID matches\n        return null;\n      } // a map-specified init segment takes priority over any transmuxed (or otherwise\n      // obtained) init segment\n      //\n      // this also caches the init segment for later use\n\n\n      initSegment = this.initSegmentForMap(map, true).bytes;\n      this.activeInitSegmentId_ = id;\n    } // We used to always prepend init segments for video, however, that shouldn't be\n    // necessary. Instead, we should only append on changes, similar to what we've always\n    // done for audio. This is more important (though may not be that important) for\n    // frame-by-frame appending for LHLS, simply because of the increased quantity of\n    // appends.\n\n\n    if (initSegment && this.appendInitSegment_[type]) {\n      // Make sure we track the playlist that we last used for the init segment, so that\n      // we can re-append the init segment in the event that we get data from a new\n      // playlist. Discontinuities and track changes are handled in other sections.\n      this.playlistOfLastInitSegment_[type] = playlist; // Disable future init segment appends for this type. Until a change is necessary.\n\n      this.appendInitSegment_[type] = false; // we need to clear out the fmp4 active init segment id, since\n      // we are appending the muxer init segment\n\n      this.activeInitSegmentId_ = null;\n      return initSegment;\n    }\n\n    return null;\n  };\n\n  _proto.handleQuotaExceededError_ = function handleQuotaExceededError_(_ref5, error) {\n    var _this3 = this;\n\n    var segmentInfo = _ref5.segmentInfo,\n        type = _ref5.type,\n        bytes = _ref5.bytes;\n    var audioBuffered = this.sourceUpdater_.audioBuffered();\n    var videoBuffered = this.sourceUpdater_.videoBuffered(); // For now we're ignoring any notion of gaps in the buffer, but they, in theory,\n    // should be cleared out during the buffer removals. However, log in case it helps\n    // debug.\n\n    if (audioBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the audio buffer: ' + timeRangesToArray(audioBuffered).join(', '));\n    }\n\n    if (videoBuffered.length > 1) {\n      this.logger_('On QUOTA_EXCEEDED_ERR, found gaps in the video buffer: ' + timeRangesToArray(videoBuffered).join(', '));\n    }\n\n    var audioBufferStart = audioBuffered.length ? audioBuffered.start(0) : 0;\n    var audioBufferEnd = audioBuffered.length ? audioBuffered.end(audioBuffered.length - 1) : 0;\n    var videoBufferStart = videoBuffered.length ? videoBuffered.start(0) : 0;\n    var videoBufferEnd = videoBuffered.length ? videoBuffered.end(videoBuffered.length - 1) : 0;\n\n    if (audioBufferEnd - audioBufferStart <= MIN_BACK_BUFFER && videoBufferEnd - videoBufferStart <= MIN_BACK_BUFFER) {\n      // Can't remove enough buffer to make room for new segment (or the browser doesn't\n      // allow for appends of segments this size). In the future, it may be possible to\n      // split up the segment and append in pieces, but for now, error out this playlist\n      // in an attempt to switch to a more manageable rendition.\n      this.logger_('On QUOTA_EXCEEDED_ERR, single segment too large to append to ' + 'buffer, triggering an error. ' + (\"Appended byte length: \" + bytes.byteLength + \", \") + (\"audio buffer: \" + timeRangesToArray(audioBuffered).join(', ') + \", \") + (\"video buffer: \" + timeRangesToArray(videoBuffered).join(', ') + \", \"));\n      this.error({\n        message: 'Quota exceeded error with append of a single segment of content',\n        excludeUntil: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // To try to resolve the quota exceeded error, clear back buffer and retry. This means\n    // that the segment-loader should block on future events until this one is handled, so\n    // that it doesn't keep moving onto further segments. Adding the call to the call\n    // queue will prevent further appends until waitingOnRemove_ and\n    // quotaExceededErrorRetryTimeout_ are cleared.\n    //\n    // Note that this will only block the current loader. In the case of demuxed content,\n    // the other load may keep filling as fast as possible. In practice, this should be\n    // OK, as it is a rare case when either audio has a high enough bitrate to fill up a\n    // source buffer, or video fills without enough room for audio to append (and without\n    // the availability of clearing out seconds of back buffer to make room for audio).\n    // But it might still be good to handle this case in the future as a TODO.\n\n\n    this.waitingOnRemove_ = true;\n    this.callQueue_.push(this.appendToSourceBuffer_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n    var currentTime = this.currentTime_(); // Try to remove as much audio and video as possible to make room for new content\n    // before retrying.\n\n    var timeToRemoveUntil = currentTime - MIN_BACK_BUFFER;\n    this.logger_(\"On QUOTA_EXCEEDED_ERR, removing audio/video from 0 to \" + timeToRemoveUntil);\n    this.remove(0, timeToRemoveUntil, function () {\n      _this3.logger_(\"On QUOTA_EXCEEDED_ERR, retrying append in \" + MIN_BACK_BUFFER + \"s\");\n\n      _this3.waitingOnRemove_ = false; // wait the length of time alotted in the back buffer to prevent wasted\n      // attempts (since we can't clear less than the minimum)\n\n      _this3.quotaExceededErrorRetryTimeout_ = window$1.setTimeout(function () {\n        _this3.logger_('On QUOTA_EXCEEDED_ERR, re-processing call queue');\n\n        _this3.quotaExceededErrorRetryTimeout_ = null;\n\n        _this3.processCallQueue_();\n      }, MIN_BACK_BUFFER * 1000);\n    }, true);\n  };\n\n  _proto.handleAppendError_ = function handleAppendError_(_ref6, error) {\n    var segmentInfo = _ref6.segmentInfo,\n        type = _ref6.type,\n        bytes = _ref6.bytes; // if there's no error, nothing to do\n\n    if (!error) {\n      return;\n    }\n\n    if (error.code === QUOTA_EXCEEDED_ERR) {\n      this.handleQuotaExceededError_({\n        segmentInfo: segmentInfo,\n        type: type,\n        bytes: bytes\n      }); // A quota exceeded error should be recoverable with a future re-append, so no need\n      // to trigger an append error.\n\n      return;\n    }\n\n    this.logger_('Received non QUOTA_EXCEEDED_ERR on append', error);\n    this.error(type + \" append of \" + bytes.length + \"b failed for segment \" + (\"#\" + segmentInfo.mediaIndex + \" in playlist \" + segmentInfo.playlist.id)); // If an append errors, we often can't recover.\n    // (see https://w3c.github.io/media-source/#sourcebuffer-append-error).\n    //\n    // Trigger a special error so that it can be handled separately from normal,\n    // recoverable errors.\n\n    this.trigger('appenderror');\n  };\n\n  _proto.appendToSourceBuffer_ = function appendToSourceBuffer_(_ref7) {\n    var segmentInfo = _ref7.segmentInfo,\n        type = _ref7.type,\n        initSegment = _ref7.initSegment,\n        data = _ref7.data,\n        bytes = _ref7.bytes; // If this is a re-append, bytes were already created and don't need to be recreated\n\n    if (!bytes) {\n      var segments = [data];\n      var byteLength = data.byteLength;\n\n      if (initSegment) {\n        // if the media initialization segment is changing, append it before the content\n        // segment\n        segments.unshift(initSegment);\n        byteLength += initSegment.byteLength;\n      } // Technically we should be OK appending the init segment separately, however, we\n      // haven't yet tested that, and prepending is how we have always done things.\n\n\n      bytes = concatSegments({\n        bytes: byteLength,\n        segments: segments\n      });\n    }\n\n    this.sourceUpdater_.appendBuffer({\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }, this.handleAppendError_.bind(this, {\n      segmentInfo: segmentInfo,\n      type: type,\n      bytes: bytes\n    }));\n  };\n\n  _proto.handleSegmentTimingInfo_ = function handleSegmentTimingInfo_(type, requestId, segmentTimingInfo) {\n    if (!this.pendingSegment_ || requestId !== this.pendingSegment_.requestId) {\n      return;\n    }\n\n    var segment = this.pendingSegment_.segment;\n    var timingInfoProperty = type + \"TimingInfo\";\n\n    if (!segment[timingInfoProperty]) {\n      segment[timingInfoProperty] = {};\n    }\n\n    segment[timingInfoProperty].transmuxerPrependedSeconds = segmentTimingInfo.prependedContentDuration || 0;\n    segment[timingInfoProperty].transmuxedPresentationStart = segmentTimingInfo.start.presentation;\n    segment[timingInfoProperty].transmuxedDecodeStart = segmentTimingInfo.start.decode;\n    segment[timingInfoProperty].transmuxedPresentationEnd = segmentTimingInfo.end.presentation;\n    segment[timingInfoProperty].transmuxedDecodeEnd = segmentTimingInfo.end.decode; // mainly used as a reference for debugging\n\n    segment[timingInfoProperty].baseMediaDecodeTime = segmentTimingInfo.baseMediaDecodeTime;\n  };\n\n  _proto.appendData_ = function appendData_(segmentInfo, result) {\n    var type = result.type,\n        data = result.data;\n\n    if (!data || !data.byteLength) {\n      return;\n    }\n\n    if (type === 'audio' && this.audioDisabled_) {\n      return;\n    }\n\n    var initSegment = this.getInitSegmentAndUpdateState_({\n      type: type,\n      initSegment: result.initSegment,\n      playlist: segmentInfo.playlist,\n      map: segmentInfo.isFmp4 ? segmentInfo.segment.map : null\n    });\n    this.appendToSourceBuffer_({\n      segmentInfo: segmentInfo,\n      type: type,\n      initSegment: initSegment,\n      data: data\n    });\n  }\n  /**\n   * load a specific segment from a request into the buffer\n   *\n   * @private\n   */\n  ;\n\n  _proto.loadSegment_ = function loadSegment_(segmentInfo) {\n    var _this4 = this;\n\n    this.state = 'WAITING';\n    this.pendingSegment_ = segmentInfo;\n    this.trimBackBuffer_(segmentInfo);\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      if (this.transmuxer_) {\n        this.transmuxer_.postMessage({\n          action: 'clearAllMp4Captions'\n        });\n      }\n    }\n\n    if (!this.hasEnoughInfoToLoad_()) {\n      this.loadQueue_.push(function () {\n        // regenerate the audioAppendStart, timestampOffset, etc as they\n        // may have changed since this function was added to the queue.\n        var options = _extends({}, segmentInfo, {\n          forceTimestampOffset: true\n        });\n\n        _extends(segmentInfo, _this4.generateSegmentInfo_(options));\n\n        _this4.isPendingTimestampOffset_ = false;\n\n        _this4.updateTransmuxerAndRequestSegment_(segmentInfo);\n      });\n      return;\n    }\n\n    this.updateTransmuxerAndRequestSegment_(segmentInfo);\n  };\n\n  _proto.updateTransmuxerAndRequestSegment_ = function updateTransmuxerAndRequestSegment_(segmentInfo) {\n    var _this5 = this; // We'll update the source buffer's timestamp offset once we have transmuxed data, but\n    // the transmuxer still needs to be updated before then.\n    //\n    // Even though keepOriginalTimestamps is set to true for the transmuxer, timestamp\n    // offset must be passed to the transmuxer for stream correcting adjustments.\n\n\n    if (this.shouldUpdateTransmuxerTimestampOffset_(segmentInfo.timestampOffset)) {\n      this.gopBuffer_.length = 0; // gopsToAlignWith was set before the GOP buffer was cleared\n\n      segmentInfo.gopsToAlignWith = [];\n      this.timeMapping_ = 0; // reset values in the transmuxer since a discontinuity should start fresh\n\n      this.transmuxer_.postMessage({\n        action: 'reset'\n      });\n      this.transmuxer_.postMessage({\n        action: 'setTimestampOffset',\n        timestampOffset: segmentInfo.timestampOffset\n      });\n    }\n\n    var simpleSegment = this.createSimplifiedSegmentObj_(segmentInfo);\n    var isEndOfStream = this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex);\n    var isWalkingForward = this.mediaIndex !== null;\n    var isDiscontinuity = segmentInfo.timeline !== this.currentTimeline_ && // currentTimeline starts at -1, so we shouldn't end the timeline switching to 0,\n    // the first timeline\n    segmentInfo.timeline > 0;\n    var isEndOfTimeline = isEndOfStream || isWalkingForward && isDiscontinuity;\n    this.logger_(\"Requesting \" + segmentInfoString(segmentInfo)); // If there's an init segment associated with this segment, but it is not cached (identified by a lack of bytes),\n    // then this init segment has never been seen before and should be appended.\n    //\n    // At this point the content type (audio/video or both) is not yet known, but it should be safe to set\n    // both to true and leave the decision of whether to append the init segment to append time.\n\n    if (simpleSegment.map && !simpleSegment.map.bytes) {\n      this.logger_('going to request init segment.');\n      this.appendInitSegment_ = {\n        video: true,\n        audio: true\n      };\n    }\n\n    segmentInfo.abortRequests = mediaSegmentRequest({\n      xhr: this.vhs_.xhr,\n      xhrOptions: this.xhrOptions_,\n      decryptionWorker: this.decrypter_,\n      segment: simpleSegment,\n      abortFn: this.handleAbort_.bind(this, segmentInfo),\n      progressFn: this.handleProgress_.bind(this),\n      trackInfoFn: this.handleTrackInfo_.bind(this),\n      timingInfoFn: this.handleTimingInfo_.bind(this),\n      videoSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'video', segmentInfo.requestId),\n      audioSegmentTimingInfoFn: this.handleSegmentTimingInfo_.bind(this, 'audio', segmentInfo.requestId),\n      captionsFn: this.handleCaptions_.bind(this),\n      isEndOfTimeline: isEndOfTimeline,\n      endedTimelineFn: function endedTimelineFn() {\n        _this5.logger_('received endedtimeline callback');\n      },\n      id3Fn: this.handleId3_.bind(this),\n      dataFn: this.handleData_.bind(this),\n      doneFn: this.segmentRequestFinished_.bind(this),\n      onTransmuxerLog: function onTransmuxerLog(_ref8) {\n        var message = _ref8.message,\n            level = _ref8.level,\n            stream = _ref8.stream;\n\n        _this5.logger_(segmentInfoString(segmentInfo) + \" logged from transmuxer stream \" + stream + \" as a \" + level + \": \" + message);\n      }\n    });\n  }\n  /**\n   * trim the back buffer so that we don't have too much data\n   * in the source buffer\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   */\n  ;\n\n  _proto.trimBackBuffer_ = function trimBackBuffer_(segmentInfo) {\n    var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10); // Chrome has a hard limit of 150MB of\n    // buffer and a very conservative \"garbage collector\"\n    // We manually clear out the old buffer to ensure\n    // we don't trigger the QuotaExceeded error\n    // on the source buffer during subsequent appends\n\n    if (removeToTime > 0) {\n      this.remove(0, removeToTime);\n    }\n  }\n  /**\n   * created a simplified copy of the segment object with just the\n   * information necessary to perform the XHR and decryption\n   *\n   * @private\n   *\n   * @param {Object} segmentInfo - the current segment\n   * @return {Object} a simplified segment object copy\n   */\n  ;\n\n  _proto.createSimplifiedSegmentObj_ = function createSimplifiedSegmentObj_(segmentInfo) {\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var simpleSegment = {\n      resolvedUri: part ? part.resolvedUri : segment.resolvedUri,\n      byterange: part ? part.byterange : segment.byterange,\n      requestId: segmentInfo.requestId,\n      transmuxer: segmentInfo.transmuxer,\n      audioAppendStart: segmentInfo.audioAppendStart,\n      gopsToAlignWith: segmentInfo.gopsToAlignWith,\n      part: segmentInfo.part\n    };\n    var previousSegment = segmentInfo.playlist.segments[segmentInfo.mediaIndex - 1];\n\n    if (previousSegment && previousSegment.timeline === segment.timeline) {\n      // The baseStartTime of a segment is used to handle rollover when probing the TS\n      // segment to retrieve timing information. Since the probe only looks at the media's\n      // times (e.g., PTS and DTS values of the segment), and doesn't consider the\n      // player's time (e.g., player.currentTime()), baseStartTime should reflect the\n      // media time as well. transmuxedDecodeEnd represents the end time of a segment, in\n      // seconds of media time, so should be used here. The previous segment is used since\n      // the end of the previous segment should represent the beginning of the current\n      // segment, so long as they are on the same timeline.\n      if (previousSegment.videoTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.videoTimingInfo.transmuxedDecodeEnd;\n      } else if (previousSegment.audioTimingInfo) {\n        simpleSegment.baseStartTime = previousSegment.audioTimingInfo.transmuxedDecodeEnd;\n      }\n    }\n\n    if (segment.key) {\n      // if the media sequence is greater than 2^32, the IV will be incorrect\n      // assuming 10s segments, that would be about 1300 years\n      var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n      simpleSegment.key = this.segmentKey(segment.key);\n      simpleSegment.key.iv = iv;\n    }\n\n    if (segment.map) {\n      simpleSegment.map = this.initSegmentForMap(segment.map);\n    }\n\n    return simpleSegment;\n  };\n\n  _proto.saveTransferStats_ = function saveTransferStats_(stats) {\n    // every request counts as a media request even if it has been aborted\n    // or canceled due to a timeout\n    this.mediaRequests += 1;\n\n    if (stats) {\n      this.mediaBytesTransferred += stats.bytesReceived;\n      this.mediaTransferDuration += stats.roundTripTime;\n    }\n  };\n\n  _proto.saveBandwidthRelatedStats_ = function saveBandwidthRelatedStats_(duration, stats) {\n    // byteLength will be used for throughput, and should be based on bytes receieved,\n    // which we only know at the end of the request and should reflect total bytes\n    // downloaded rather than just bytes processed from components of the segment\n    this.pendingSegment_.byteLength = stats.bytesReceived;\n\n    if (duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's bandwidth because its duration of \" + duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    this.bandwidth = stats.bandwidth;\n    this.roundTrip = stats.roundTripTime;\n  };\n\n  _proto.handleTimeout_ = function handleTimeout_() {\n    // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functinality between segment loaders\n    this.mediaRequestsTimedout += 1;\n    this.bandwidth = 1;\n    this.roundTrip = NaN;\n    this.trigger('bandwidthupdate');\n    this.trigger('timeout');\n  }\n  /**\n   * Handle the callback from the segmentRequest function and set the\n   * associated SegmentLoader state and errors if necessary\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    // TODO handle special cases, e.g., muxed audio/video but only audio in the segment\n    // check the call queue directly since this function doesn't need to deal with any\n    // data, and can continue even if the source buffers are not set up and we didn't get\n    // any data from the segment\n    if (this.callQueue_.length) {\n      this.callQueue_.push(this.segmentRequestFinished_.bind(this, error, simpleSegment, result));\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // The request was aborted and the SegmentLoader has already been reset\n\n    if (!this.pendingSegment_) {\n      return;\n    } // the request was aborted and the SegmentLoader has already started\n    // another request. this can happen when the timeout for an aborted\n    // request triggers due to a limitation in the XHR library\n    // do not count this as any sort of request or we risk double-counting\n\n\n    if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n      return;\n    } // an error occurred from the active pendingSegment_ so reset everything\n\n\n    if (error) {\n      this.pendingSegment_ = null;\n      this.state = 'READY'; // aborts are not a true error condition and nothing corrective needs to be done\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        return;\n      }\n\n      this.pause(); // the error is really just that at least one of the requests timed-out\n      // set the bandwidth to a very low value and trigger an ABR switch to\n      // take emergency action\n\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n        return;\n      } // if control-flow has arrived here, then the error is real\n      // emit an error event to blacklist the current playlist\n\n\n      this.mediaRequestsErrored += 1;\n      this.error(error);\n      this.trigger('error');\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // the response was a success so set any bandwidth stats the request\n    // generated for ABR purposes\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats);\n    segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;\n\n    if (result.gopInfo) {\n      this.gopBuffer_ = updateGopBuffer(this.gopBuffer_, result.gopInfo, this.safeAppend_);\n    } // Although we may have already started appending on progress, we shouldn't switch the\n    // state away from loading until we are officially done loading the segment data.\n\n\n    this.state = 'APPENDING'; // used for testing\n\n    this.trigger('appending');\n    this.waitForAppendsToComplete_(segmentInfo);\n  };\n\n  _proto.setTimeMapping_ = function setTimeMapping_(timeline) {\n    var timelineMapping = this.syncController_.mappingForTimeline(timeline);\n\n    if (timelineMapping !== null) {\n      this.timeMapping_ = timelineMapping;\n    }\n  };\n\n  _proto.updateMediaSecondsLoaded_ = function updateMediaSecondsLoaded_(segment) {\n    if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n      this.mediaSecondsLoaded += segment.end - segment.start;\n    } else {\n      this.mediaSecondsLoaded += segment.duration;\n    }\n  };\n\n  _proto.shouldUpdateTransmuxerTimestampOffset_ = function shouldUpdateTransmuxerTimestampOffset_(timestampOffset) {\n    if (timestampOffset === null) {\n      return false;\n    } // note that we're potentially using the same timestamp offset for both video and\n    // audio\n\n\n    if (this.loaderType_ === 'main' && timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      return true;\n    }\n\n    if (!this.audioDisabled_ && timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.trueSegmentStart_ = function trueSegmentStart_(_ref9) {\n    var currentStart = _ref9.currentStart,\n        playlist = _ref9.playlist,\n        mediaIndex = _ref9.mediaIndex,\n        firstVideoFrameTimeForData = _ref9.firstVideoFrameTimeForData,\n        currentVideoTimestampOffset = _ref9.currentVideoTimestampOffset,\n        useVideoTimingInfo = _ref9.useVideoTimingInfo,\n        videoTimingInfo = _ref9.videoTimingInfo,\n        audioTimingInfo = _ref9.audioTimingInfo;\n\n    if (typeof currentStart !== 'undefined') {\n      // if start was set once, keep using it\n      return currentStart;\n    }\n\n    if (!useVideoTimingInfo) {\n      return audioTimingInfo.start;\n    }\n\n    var previousSegment = playlist.segments[mediaIndex - 1]; // The start of a segment should be the start of the first full frame contained\n    // within that segment. Since the transmuxer maintains a cache of incomplete data\n    // from and/or the last frame seen, the start time may reflect a frame that starts\n    // in the previous segment. Check for that case and ensure the start time is\n    // accurate for the segment.\n\n    if (mediaIndex === 0 || !previousSegment || typeof previousSegment.start === 'undefined' || previousSegment.end !== firstVideoFrameTimeForData + currentVideoTimestampOffset) {\n      return firstVideoFrameTimeForData;\n    }\n\n    return videoTimingInfo.start;\n  };\n\n  _proto.waitForAppendsToComplete_ = function waitForAppendsToComplete_(segmentInfo) {\n    var trackInfo = this.getCurrentMediaInfo_(segmentInfo);\n\n    if (!trackInfo) {\n      this.error({\n        message: 'No starting media returned, likely due to an unsupported media format.',\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return;\n    } // Although transmuxing is done, appends may not yet be finished. Throw a marker\n    // on each queue this loader is responsible for to ensure that the appends are\n    // complete.\n\n\n    var hasAudio = trackInfo.hasAudio,\n        hasVideo = trackInfo.hasVideo,\n        isMuxed = trackInfo.isMuxed;\n    var waitForVideo = this.loaderType_ === 'main' && hasVideo;\n    var waitForAudio = !this.audioDisabled_ && hasAudio && !isMuxed;\n    segmentInfo.waitingOnAppends = 0; // segments with no data\n\n    if (!segmentInfo.hasAppendedData_) {\n      if (!segmentInfo.timingInfo && typeof segmentInfo.timestampOffset === 'number') {\n        // When there's no audio or video data in the segment, there's no audio or video\n        // timing information.\n        //\n        // If there's no audio or video timing information, then the timestamp offset\n        // can't be adjusted to the appropriate value for the transmuxer and source\n        // buffers.\n        //\n        // Therefore, the next segment should be used to set the timestamp offset.\n        this.isPendingTimestampOffset_ = true;\n      } // override settings for metadata only segments\n\n\n      segmentInfo.timingInfo = {\n        start: 0\n      };\n      segmentInfo.waitingOnAppends++;\n\n      if (!this.isPendingTimestampOffset_) {\n        // update the timestampoffset\n        this.updateSourceBufferTimestampOffset_(segmentInfo); // make sure the metadata queue is processed even though we have\n        // no video/audio data.\n\n        this.processMetadataQueue_();\n      } // append is \"done\" instantly with no data.\n\n\n      this.checkAppendsDone_(segmentInfo);\n      return;\n    } // Since source updater could call back synchronously, do the increments first.\n\n\n    if (waitForVideo) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForAudio) {\n      segmentInfo.waitingOnAppends++;\n    }\n\n    if (waitForVideo) {\n      this.sourceUpdater_.videoQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n\n    if (waitForAudio) {\n      this.sourceUpdater_.audioQueueCallback(this.checkAppendsDone_.bind(this, segmentInfo));\n    }\n  };\n\n  _proto.checkAppendsDone_ = function checkAppendsDone_(segmentInfo) {\n    if (this.checkForAbort_(segmentInfo.requestId)) {\n      return;\n    }\n\n    segmentInfo.waitingOnAppends--;\n\n    if (segmentInfo.waitingOnAppends === 0) {\n      this.handleAppendsDone_();\n    }\n  };\n\n  _proto.checkForIllegalMediaSwitch = function checkForIllegalMediaSwitch(trackInfo) {\n    var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.getCurrentMediaInfo_(), trackInfo);\n\n    if (illegalMediaSwitchError) {\n      this.error({\n        message: illegalMediaSwitchError,\n        blacklistDuration: Infinity\n      });\n      this.trigger('error');\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.updateSourceBufferTimestampOffset_ = function updateSourceBufferTimestampOffset_(segmentInfo) {\n    if (segmentInfo.timestampOffset === null || // we don't yet have the start for whatever media type (video or audio) has\n    // priority, timing-wise, so we must wait\n    typeof segmentInfo.timingInfo.start !== 'number' || // already updated the timestamp offset for this segment\n    segmentInfo.changedTimestampOffset || // the alt audio loader should not be responsible for setting the timestamp offset\n    this.loaderType_ !== 'main') {\n      return;\n    }\n\n    var didChange = false; // Primary timing goes by video, and audio is trimmed in the transmuxer, meaning that\n    // the timing info here comes from video. In the event that the audio is longer than\n    // the video, this will trim the start of the audio.\n    // This also trims any offset from 0 at the beginning of the media\n\n    segmentInfo.timestampOffset -= this.getSegmentStartTimeForTimestampOffsetCalculation_({\n      videoTimingInfo: segmentInfo.segment.videoTimingInfo,\n      audioTimingInfo: segmentInfo.segment.audioTimingInfo,\n      timingInfo: segmentInfo.timingInfo\n    }); // In the event that there are part segment downloads, each will try to update the\n    // timestamp offset. Retaining this bit of state prevents us from updating in the\n    // future (within the same segment), however, there may be a better way to handle it.\n\n    segmentInfo.changedTimestampOffset = true;\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.videoTimestampOffset()) {\n      this.sourceUpdater_.videoTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (segmentInfo.timestampOffset !== this.sourceUpdater_.audioTimestampOffset()) {\n      this.sourceUpdater_.audioTimestampOffset(segmentInfo.timestampOffset);\n      didChange = true;\n    }\n\n    if (didChange) {\n      this.trigger('timestampoffset');\n    }\n  };\n\n  _proto.getSegmentStartTimeForTimestampOffsetCalculation_ = function getSegmentStartTimeForTimestampOffsetCalculation_(_ref10) {\n    var videoTimingInfo = _ref10.videoTimingInfo,\n        audioTimingInfo = _ref10.audioTimingInfo,\n        timingInfo = _ref10.timingInfo;\n\n    if (!this.useDtsForTimestampOffset_) {\n      return timingInfo.start;\n    }\n\n    if (videoTimingInfo && typeof videoTimingInfo.transmuxedDecodeStart === 'number') {\n      return videoTimingInfo.transmuxedDecodeStart;\n    } // handle audio only\n\n\n    if (audioTimingInfo && typeof audioTimingInfo.transmuxedDecodeStart === 'number') {\n      return audioTimingInfo.transmuxedDecodeStart;\n    } // handle content not transmuxed (e.g., MP4)\n\n\n    return timingInfo.start;\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_(segmentInfo) {\n    segmentInfo.timingInfo = segmentInfo.timingInfo || {};\n    var trackInfo = this.getMediaInfo_();\n    var useVideoTimingInfo = this.loaderType_ === 'main' && trackInfo && trackInfo.hasVideo;\n    var prioritizedTimingInfo = useVideoTimingInfo && segmentInfo.videoTimingInfo ? segmentInfo.videoTimingInfo : segmentInfo.audioTimingInfo;\n\n    if (!prioritizedTimingInfo) {\n      return;\n    }\n\n    segmentInfo.timingInfo.end = typeof prioritizedTimingInfo.end === 'number' ? // End time may not exist in a case where we aren't parsing the full segment (one\n    // current example is the case of fmp4), so use the rough duration to calculate an\n    // end time.\n    prioritizedTimingInfo.end : prioritizedTimingInfo.start + segmentInfo.duration;\n  }\n  /**\n   * callback to run when appendBuffer is finished. detects if we are\n   * in a good state to do things with the data we got, or if we need\n   * to wait for more\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleAppendsDone_ = function handleAppendsDone_() {\n    // appendsdone can cause an abort\n    if (this.pendingSegment_) {\n      this.trigger('appendsdone');\n    }\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY'; // TODO should this move into this.checkForAbort to speed up requests post abort in\n      // all appending cases?\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // Now that the end of the segment has been reached, we can set the end time. It's\n    // best to wait until all appends are done so we're sure that the primary media is\n    // finished (and we have its end time).\n\n    this.updateTimingInfoEnd_(segmentInfo);\n\n    if (this.shouldSaveSegmentTimingInfo_) {\n      // Timeline mappings should only be saved for the main loader. This is for multiple\n      // reasons:\n      //\n      // 1) Only one mapping is saved per timeline, meaning that if both the audio loader\n      //    and the main loader try to save the timeline mapping, whichever comes later\n      //    will overwrite the first. In theory this is OK, as the mappings should be the\n      //    same, however, it breaks for (2)\n      // 2) In the event of a live stream, the initial live point will make for a somewhat\n      //    arbitrary mapping. If audio and video streams are not perfectly in-sync, then\n      //    the mapping will be off for one of the streams, dependent on which one was\n      //    first saved (see (1)).\n      // 3) Primary timing goes by video in VHS, so the mapping should be video.\n      //\n      // Since the audio loader will wait for the main loader to load the first segment,\n      // the main loader will save the first timeline mapping, and ensure that there won't\n      // be a case where audio loads two segments without saving a mapping (thus leading\n      // to missing segment timing info).\n      this.syncController_.saveSegmentTimingInfo({\n        segmentInfo: segmentInfo,\n        shouldSaveTimelineMapping: this.loaderType_ === 'main'\n      });\n    }\n\n    var segmentDurationMessage = getTroublesomeSegmentDurationMessage(segmentInfo, this.sourceType_);\n\n    if (segmentDurationMessage) {\n      if (segmentDurationMessage.severity === 'warn') {\n        videojs.log.warn(segmentDurationMessage.message);\n      } else {\n        this.logger_(segmentDurationMessage.message);\n      }\n    }\n\n    this.recordThroughput_(segmentInfo);\n    this.pendingSegment_ = null;\n    this.state = 'READY';\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate'); // if the sync request was not appended\n      // then it was not the correct segment.\n      // throw it away and use the data it gave us\n      // to get the correct one.\n\n      if (!segmentInfo.hasAppendedData_) {\n        this.logger_(\"Throwing away un-appended sync request \" + segmentInfoString(segmentInfo));\n        return;\n      }\n    }\n\n    this.logger_(\"Appended \" + segmentInfoString(segmentInfo));\n    this.addSegmentMetadataCue_(segmentInfo);\n    this.fetchAtBuffer_ = true;\n\n    if (this.currentTimeline_ !== segmentInfo.timeline) {\n      this.timelineChangeController_.lastTimelineChange({\n        type: this.loaderType_,\n        from: this.currentTimeline_,\n        to: segmentInfo.timeline\n      }); // If audio is not disabled, the main segment loader is responsible for updating\n      // the audio timeline as well. If the content is video only, this won't have any\n      // impact.\n\n      if (this.loaderType_ === 'main' && !this.audioDisabled_) {\n        this.timelineChangeController_.lastTimelineChange({\n          type: 'audio',\n          from: this.currentTimeline_,\n          to: segmentInfo.timeline\n        });\n      }\n    }\n\n    this.currentTimeline_ = segmentInfo.timeline; // We must update the syncinfo to recalculate the seekable range before\n    // the following conditional otherwise it may consider this a bad \"guess\"\n    // and attempt to resync when the post-update seekable window and live\n    // point would mean that this was the perfect segment to fetch\n\n    this.trigger('syncinfoupdate');\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var badSegmentGuess = segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3;\n    var badPartGuess = part && part.end && this.currentTime_() - part.end > segmentInfo.playlist.partTargetDuration * 3; // If we previously appended a segment/part that ends more than 3 part/targetDurations before\n    // the currentTime_ that means that our conservative guess was too conservative.\n    // In that case, reset the loader state so that we try to use any information gained\n    // from the previous request to create a new, more accurate, sync-point.\n\n    if (badSegmentGuess || badPartGuess) {\n      this.logger_(\"bad \" + (badSegmentGuess ? 'segment' : 'part') + \" \" + segmentInfoString(segmentInfo));\n      this.resetEverything();\n      return;\n    }\n\n    var isWalkingForward = this.mediaIndex !== null; // Don't do a rendition switch unless we have enough time to get a sync segment\n    // and conservatively guess\n\n    if (isWalkingForward) {\n      this.trigger('bandwidthupdate');\n    }\n\n    this.trigger('progress');\n    this.mediaIndex = segmentInfo.mediaIndex;\n    this.partIndex = segmentInfo.partIndex; // any time an update finishes and the last segment is in the\n    // buffer, end the stream. this ensures the \"ended\" event will\n    // fire if playback reaches that point.\n\n    if (this.isEndOfStream_(segmentInfo.mediaIndex, segmentInfo.playlist, segmentInfo.partIndex)) {\n      this.endOfStream();\n    } // used for testing\n\n\n    this.trigger('appended');\n\n    if (segmentInfo.hasAppendedData_) {\n      this.mediaAppends++;\n    }\n\n    if (!this.paused()) {\n      this.monitorBuffer_();\n    }\n  }\n  /**\n   * Records the current throughput of the decrypt, transmux, and append\n   * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n   * moving average of the throughput. `throughput.count` is the number of\n   * data points in the average.\n   *\n   * @private\n   * @param {Object} segmentInfo the object returned by loadSegment\n   */\n  ;\n\n  _proto.recordThroughput_ = function recordThroughput_(segmentInfo) {\n    if (segmentInfo.duration < MIN_SEGMENT_DURATION_TO_SAVE_STATS) {\n      this.logger_(\"Ignoring segment's throughput because its duration of \" + segmentInfo.duration + (\" is less than the min to record \" + MIN_SEGMENT_DURATION_TO_SAVE_STATS));\n      return;\n    }\n\n    var rate = this.throughput.rate; // Add one to the time to ensure that we don't accidentally attempt to divide\n    // by zero in the case where the throughput is ridiculously high\n\n    var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1; // Multiply by 8000 to convert from bytes/millisecond to bits/second\n\n    var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000); // This is just a cumulative moving average calculation:\n    //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n\n    this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n  }\n  /**\n   * Adds a cue to the segment-metadata track with some metadata information about the\n   * segment\n   *\n   * @private\n   * @param {Object} segmentInfo\n   *        the object returned by loadSegment\n   * @method addSegmentMetadataCue_\n   */\n  ;\n\n  _proto.addSegmentMetadataCue_ = function addSegmentMetadataCue_(segmentInfo) {\n    if (!this.segmentMetadataTrack_) {\n      return;\n    }\n\n    var segment = segmentInfo.segment;\n    var start = segment.start;\n    var end = segment.end; // Do not try adding the cue if the start and end times are invalid.\n\n    if (!finite(start) || !finite(end)) {\n      return;\n    }\n\n    removeCuesFromTrack(start, end, this.segmentMetadataTrack_);\n    var Cue = window$1.WebKitDataCue || window$1.VTTCue;\n    var value = {\n      custom: segment.custom,\n      dateTimeObject: segment.dateTimeObject,\n      dateTimeString: segment.dateTimeString,\n      bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n      resolution: segmentInfo.playlist.attributes.RESOLUTION,\n      codecs: segmentInfo.playlist.attributes.CODECS,\n      byteLength: segmentInfo.byteLength,\n      uri: segmentInfo.uri,\n      timeline: segmentInfo.timeline,\n      playlist: segmentInfo.playlist.id,\n      start: start,\n      end: end\n    };\n    var data = JSON.stringify(value);\n    var cue = new Cue(start, end, data); // Attach the metadata to the value property of the cue to keep consistency between\n    // the differences of WebKitDataCue in safari and VTTCue in other browsers\n\n    cue.value = value;\n    this.segmentMetadataTrack_.addCue(cue);\n  };\n\n  return SegmentLoader;\n}(videojs.EventTarget);\n\nfunction noop() {}\n\nvar toTitleCase = function toTitleCase(string) {\n  if (typeof string !== 'string') {\n    return string;\n  }\n\n  return string.replace(/./, function (w) {\n    return w.toUpperCase();\n  });\n};\n\nvar bufferTypes = ['video', 'audio'];\n\nvar _updating = function updating(type, sourceUpdater) {\n  var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n  return sourceBuffer && sourceBuffer.updating || sourceUpdater.queuePending[type];\n};\n\nvar nextQueueIndexOfType = function nextQueueIndexOfType(type, queue) {\n  for (var i = 0; i < queue.length; i++) {\n    var queueEntry = queue[i];\n\n    if (queueEntry.type === 'mediaSource') {\n      // If the next entry is a media source entry (uses multiple source buffers), block\n      // processing to allow it to go through first.\n      return null;\n    }\n\n    if (queueEntry.type === type) {\n      return i;\n    }\n  }\n\n  return null;\n};\n\nvar shiftQueue = function shiftQueue(type, sourceUpdater) {\n  if (sourceUpdater.queue.length === 0) {\n    return;\n  }\n\n  var queueIndex = 0;\n  var queueEntry = sourceUpdater.queue[queueIndex];\n\n  if (queueEntry.type === 'mediaSource') {\n    if (!sourceUpdater.updating() && sourceUpdater.mediaSource.readyState !== 'closed') {\n      sourceUpdater.queue.shift();\n      queueEntry.action(sourceUpdater);\n\n      if (queueEntry.doneFn) {\n        queueEntry.doneFn();\n      } // Only specific source buffer actions must wait for async updateend events. Media\n      // Source actions process synchronously. Therefore, both audio and video source\n      // buffers are now clear to process the next queue entries.\n\n\n      shiftQueue('audio', sourceUpdater);\n      shiftQueue('video', sourceUpdater);\n    } // Media Source actions require both source buffers, so if the media source action\n    // couldn't process yet (because one or both source buffers are busy), block other\n    // queue actions until both are available and the media source action can process.\n\n\n    return;\n  }\n\n  if (type === 'mediaSource') {\n    // If the queue was shifted by a media source action (this happens when pushing a\n    // media source action onto the queue), then it wasn't from an updateend event from an\n    // audio or video source buffer, so there's no change from previous state, and no\n    // processing should be done.\n    return;\n  } // Media source queue entries don't need to consider whether the source updater is\n  // started (i.e., source buffers are created) as they don't need the source buffers, but\n  // source buffer queue entries do.\n\n\n  if (!sourceUpdater.ready() || sourceUpdater.mediaSource.readyState === 'closed' || _updating(type, sourceUpdater)) {\n    return;\n  }\n\n  if (queueEntry.type !== type) {\n    queueIndex = nextQueueIndexOfType(type, sourceUpdater.queue);\n\n    if (queueIndex === null) {\n      // Either there's no queue entry that uses this source buffer type in the queue, or\n      // there's a media source queue entry before the next entry of this type, in which\n      // case wait for that action to process first.\n      return;\n    }\n\n    queueEntry = sourceUpdater.queue[queueIndex];\n  }\n\n  sourceUpdater.queue.splice(queueIndex, 1); // Keep a record that this source buffer type is in use.\n  //\n  // The queue pending operation must be set before the action is performed in the event\n  // that the action results in a synchronous event that is acted upon. For instance, if\n  // an exception is thrown that can be handled, it's possible that new actions will be\n  // appended to an empty queue and immediately executed, but would not have the correct\n  // pending information if this property was set after the action was performed.\n\n  sourceUpdater.queuePending[type] = queueEntry;\n  queueEntry.action(type, sourceUpdater);\n\n  if (!queueEntry.doneFn) {\n    // synchronous operation, process next entry\n    sourceUpdater.queuePending[type] = null;\n    shiftQueue(type, sourceUpdater);\n    return;\n  }\n};\n\nvar cleanupBuffer = function cleanupBuffer(type, sourceUpdater) {\n  var buffer = sourceUpdater[type + \"Buffer\"];\n  var titleType = toTitleCase(type);\n\n  if (!buffer) {\n    return;\n  }\n\n  buffer.removeEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n  buffer.removeEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n  sourceUpdater.codecs[type] = null;\n  sourceUpdater[type + \"Buffer\"] = null;\n};\n\nvar inSourceBuffers = function inSourceBuffers(mediaSource, sourceBuffer) {\n  return mediaSource && sourceBuffer && Array.prototype.indexOf.call(mediaSource.sourceBuffers, sourceBuffer) !== -1;\n};\n\nvar actions = {\n  appendBuffer: function appendBuffer(bytes, segmentInfo, onError) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Appending segment \" + segmentInfo.mediaIndex + \"'s \" + bytes.length + \" bytes to \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.appendBuffer(bytes);\n      } catch (e) {\n        sourceUpdater.logger_(\"Error with code \" + e.code + \" \" + (e.code === QUOTA_EXCEEDED_ERR ? '(QUOTA_EXCEEDED_ERR) ' : '') + (\"when appending segment \" + segmentInfo.mediaIndex + \" to \" + type + \"Buffer\"));\n        sourceUpdater.queuePending[type] = null;\n        onError(e);\n      }\n    };\n  },\n  remove: function remove(start, end) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + start + \" to \" + end + \" from \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.remove(start, end);\n      } catch (e) {\n        sourceUpdater.logger_(\"Remove \" + start + \" to \" + end + \" from \" + type + \"Buffer failed\");\n      }\n    };\n  },\n  timestampOffset: function timestampOffset(offset) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Setting \" + type + \"timestampOffset to \" + offset);\n      sourceBuffer.timestampOffset = offset;\n    };\n  },\n  callback: function callback(_callback) {\n    return function (type, sourceUpdater) {\n      _callback();\n    };\n  },\n  endOfStream: function endOfStream(error) {\n    return function (sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Calling mediaSource endOfStream(\" + (error || '') + \")\");\n\n      try {\n        sourceUpdater.mediaSource.endOfStream(error);\n      } catch (e) {\n        videojs.log.warn('Failed to call media source endOfStream', e);\n      }\n    };\n  },\n  duration: function duration(_duration) {\n    return function (sourceUpdater) {\n      sourceUpdater.logger_(\"Setting mediaSource duration to \" + _duration);\n\n      try {\n        sourceUpdater.mediaSource.duration = _duration;\n      } catch (e) {\n        videojs.log.warn('Failed to set media source duration', e);\n      }\n    };\n  },\n  abort: function abort() {\n    return function (type, sourceUpdater) {\n      if (sourceUpdater.mediaSource.readyState !== 'open') {\n        return;\n      }\n\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"]; // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"calling abort on \" + type + \"Buffer\");\n\n      try {\n        sourceBuffer.abort();\n      } catch (e) {\n        videojs.log.warn(\"Failed to abort on \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  addSourceBuffer: function addSourceBuffer(type, codec) {\n    return function (sourceUpdater) {\n      var titleType = toTitleCase(type);\n      var mime = getMimeForCodec(codec);\n      sourceUpdater.logger_(\"Adding \" + type + \"Buffer with codec \" + codec + \" to mediaSource\");\n      var sourceBuffer = sourceUpdater.mediaSource.addSourceBuffer(mime);\n      sourceBuffer.addEventListener('updateend', sourceUpdater[\"on\" + titleType + \"UpdateEnd_\"]);\n      sourceBuffer.addEventListener('error', sourceUpdater[\"on\" + titleType + \"Error_\"]);\n      sourceUpdater.codecs[type] = codec;\n      sourceUpdater[type + \"Buffer\"] = sourceBuffer;\n    };\n  },\n  removeSourceBuffer: function removeSourceBuffer(type) {\n    return function (sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      cleanupBuffer(type, sourceUpdater); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"Removing \" + type + \"Buffer with codec \" + sourceUpdater.codecs[type] + \" from mediaSource\");\n\n      try {\n        sourceUpdater.mediaSource.removeSourceBuffer(sourceBuffer);\n      } catch (e) {\n        videojs.log.warn(\"Failed to removeSourceBuffer \" + type + \"Buffer\", e);\n      }\n    };\n  },\n  changeType: function changeType(codec) {\n    return function (type, sourceUpdater) {\n      var sourceBuffer = sourceUpdater[type + \"Buffer\"];\n      var mime = getMimeForCodec(codec); // can't do anything if the media source / source buffer is null\n      // or the media source does not contain this source buffer.\n\n      if (!inSourceBuffers(sourceUpdater.mediaSource, sourceBuffer)) {\n        return;\n      } // do not update codec if we don't need to.\n\n\n      if (sourceUpdater.codecs[type] === codec) {\n        return;\n      }\n\n      sourceUpdater.logger_(\"changing \" + type + \"Buffer codec from \" + sourceUpdater.codecs[type] + \" to \" + codec);\n      sourceBuffer.changeType(mime);\n      sourceUpdater.codecs[type] = codec;\n    };\n  }\n};\n\nvar pushQueue = function pushQueue(_ref) {\n  var type = _ref.type,\n      sourceUpdater = _ref.sourceUpdater,\n      action = _ref.action,\n      doneFn = _ref.doneFn,\n      name = _ref.name;\n  sourceUpdater.queue.push({\n    type: type,\n    action: action,\n    doneFn: doneFn,\n    name: name\n  });\n  shiftQueue(type, sourceUpdater);\n};\n\nvar onUpdateend = function onUpdateend(type, sourceUpdater) {\n  return function (e) {\n    // Although there should, in theory, be a pending action for any updateend receieved,\n    // there are some actions that may trigger updateend events without set definitions in\n    // the w3c spec. For instance, setting the duration on the media source may trigger\n    // updateend events on source buffers. This does not appear to be in the spec. As such,\n    // if we encounter an updateend without a corresponding pending action from our queue\n    // for that source buffer type, process the next action.\n    if (sourceUpdater.queuePending[type]) {\n      var doneFn = sourceUpdater.queuePending[type].doneFn;\n      sourceUpdater.queuePending[type] = null;\n\n      if (doneFn) {\n        // if there's an error, report it\n        doneFn(sourceUpdater[type + \"Error_\"]);\n      }\n    }\n\n    shiftQueue(type, sourceUpdater);\n  };\n};\n/**\n * A queue of callbacks to be serialized and applied when a\n * MediaSource and its associated SourceBuffers are not in the\n * updating state. It is used by the segment loader to update the\n * underlying SourceBuffers when new data is loaded, for instance.\n *\n * @class SourceUpdater\n * @param {MediaSource} mediaSource the MediaSource to create the SourceBuffer from\n * @param {string} mimeType the desired MIME type of the underlying SourceBuffer\n */\n\n\nvar SourceUpdater = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SourceUpdater, _videojs$EventTarget);\n\n  function SourceUpdater(mediaSource) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.mediaSource = mediaSource;\n\n    _this.sourceopenListener_ = function () {\n      return shiftQueue('mediaSource', _assertThisInitialized(_this));\n    };\n\n    _this.mediaSource.addEventListener('sourceopen', _this.sourceopenListener_);\n\n    _this.logger_ = logger('SourceUpdater'); // initial timestamp offset is 0\n\n    _this.audioTimestampOffset_ = 0;\n    _this.videoTimestampOffset_ = 0;\n    _this.queue = [];\n    _this.queuePending = {\n      audio: null,\n      video: null\n    };\n    _this.delayedAudioAppendQueue_ = [];\n    _this.videoAppendQueued_ = false;\n    _this.codecs = {};\n    _this.onVideoUpdateEnd_ = onUpdateend('video', _assertThisInitialized(_this));\n    _this.onAudioUpdateEnd_ = onUpdateend('audio', _assertThisInitialized(_this));\n\n    _this.onVideoError_ = function (e) {\n      // used for debugging\n      _this.videoError_ = e;\n    };\n\n    _this.onAudioError_ = function (e) {\n      // used for debugging\n      _this.audioError_ = e;\n    };\n\n    _this.createdSourceBuffers_ = false;\n    _this.initializedEme_ = false;\n    _this.triggeredReady_ = false;\n    return _this;\n  }\n\n  var _proto = SourceUpdater.prototype;\n\n  _proto.initializedEme = function initializedEme() {\n    this.initializedEme_ = true;\n    this.triggerReady();\n  };\n\n  _proto.hasCreatedSourceBuffers = function hasCreatedSourceBuffers() {\n    // if false, likely waiting on one of the segment loaders to get enough data to create\n    // source buffers\n    return this.createdSourceBuffers_;\n  };\n\n  _proto.hasInitializedAnyEme = function hasInitializedAnyEme() {\n    return this.initializedEme_;\n  };\n\n  _proto.ready = function ready() {\n    return this.hasCreatedSourceBuffers() && this.hasInitializedAnyEme();\n  };\n\n  _proto.createSourceBuffers = function createSourceBuffers(codecs) {\n    if (this.hasCreatedSourceBuffers()) {\n      // already created them before\n      return;\n    } // the intial addOrChangeSourceBuffers will always be\n    // two add buffers.\n\n\n    this.addOrChangeSourceBuffers(codecs);\n    this.createdSourceBuffers_ = true;\n    this.trigger('createdsourcebuffers');\n    this.triggerReady();\n  };\n\n  _proto.triggerReady = function triggerReady() {\n    // only allow ready to be triggered once, this prevents the case\n    // where:\n    // 1. we trigger createdsourcebuffers\n    // 2. ie 11 synchronously initializates eme\n    // 3. the synchronous initialization causes us to trigger ready\n    // 4. We go back to the ready check in createSourceBuffers and ready is triggered again.\n    if (this.ready() && !this.triggeredReady_) {\n      this.triggeredReady_ = true;\n      this.trigger('ready');\n    }\n  }\n  /**\n   * Add a type of source buffer to the media source.\n   *\n   * @param {string} type\n   *        The type of source buffer to add.\n   *\n   * @param {string} codec\n   *        The codec to add the source buffer with.\n   */\n  ;\n\n  _proto.addSourceBuffer = function addSourceBuffer(type, codec) {\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.addSourceBuffer(type, codec),\n      name: 'addSourceBuffer'\n    });\n  }\n  /**\n   * call abort on a source buffer.\n   *\n   * @param {string} type\n   *        The type of source buffer to call abort on.\n   */\n  ;\n\n  _proto.abort = function abort(type) {\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.abort(type),\n      name: 'abort'\n    });\n  }\n  /**\n   * Call removeSourceBuffer and remove a specific type\n   * of source buffer on the mediaSource.\n   *\n   * @param {string} type\n   *        The type of source buffer to remove.\n   */\n  ;\n\n  _proto.removeSourceBuffer = function removeSourceBuffer(type) {\n    if (!this.canRemoveSourceBuffer()) {\n      videojs.log.error('removeSourceBuffer is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.removeSourceBuffer(type),\n      name: 'removeSourceBuffer'\n    });\n  }\n  /**\n   * Whether or not the removeSourceBuffer function is supported\n   * on the mediaSource.\n   *\n   * @return {boolean}\n   *          if removeSourceBuffer can be called.\n   */\n  ;\n\n  _proto.canRemoveSourceBuffer = function canRemoveSourceBuffer() {\n    // IE reports that it supports removeSourceBuffer, but often throws\n    // errors when attempting to use the function. So we report that it\n    // does not support removeSourceBuffer. As of Firefox 83 removeSourceBuffer\n    // throws errors, so we report that it does not support this as well.\n    return !videojs.browser.IE_VERSION && !videojs.browser.IS_FIREFOX && window$1.MediaSource && window$1.MediaSource.prototype && typeof window$1.MediaSource.prototype.removeSourceBuffer === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  SourceUpdater.canChangeType = function canChangeType() {\n    return window$1.SourceBuffer && window$1.SourceBuffer.prototype && typeof window$1.SourceBuffer.prototype.changeType === 'function';\n  }\n  /**\n   * Whether or not the changeType function is supported\n   * on our SourceBuffers.\n   *\n   * @return {boolean}\n   *         if changeType can be called.\n   */\n  ;\n\n  _proto.canChangeType = function canChangeType() {\n    return this.constructor.canChangeType();\n  }\n  /**\n   * Call the changeType function on a source buffer, given the code and type.\n   *\n   * @param {string} type\n   *        The type of source buffer to call changeType on.\n   *\n   * @param {string} codec\n   *        The codec string to change type with on the source buffer.\n   */\n  ;\n\n  _proto.changeType = function changeType(type, codec) {\n    if (!this.canChangeType()) {\n      videojs.log.error('changeType is not supported!');\n      return;\n    }\n\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.changeType(codec),\n      name: 'changeType'\n    });\n  }\n  /**\n   * Add source buffers with a codec or, if they are already created,\n   * call changeType on source buffers using changeType.\n   *\n   * @param {Object} codecs\n   *        Codecs to switch to\n   */\n  ;\n\n  _proto.addOrChangeSourceBuffers = function addOrChangeSourceBuffers(codecs) {\n    var _this2 = this;\n\n    if (!codecs || typeof codecs !== 'object' || Object.keys(codecs).length === 0) {\n      throw new Error('Cannot addOrChangeSourceBuffers to undefined codecs');\n    }\n\n    Object.keys(codecs).forEach(function (type) {\n      var codec = codecs[type];\n\n      if (!_this2.hasCreatedSourceBuffers()) {\n        return _this2.addSourceBuffer(type, codec);\n      }\n\n      if (_this2.canChangeType()) {\n        _this2.changeType(type, codec);\n      }\n    });\n  }\n  /**\n   * Queue an update to append an ArrayBuffer.\n   *\n   * @param {MediaObject} object containing audioBytes and/or videoBytes\n   * @param {Function} done the function to call when done\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-appendBuffer-void-ArrayBuffer-data\n   */\n  ;\n\n  _proto.appendBuffer = function appendBuffer(options, doneFn) {\n    var _this3 = this;\n\n    var segmentInfo = options.segmentInfo,\n        type = options.type,\n        bytes = options.bytes;\n    this.processedAppend_ = true;\n\n    if (type === 'audio' && this.videoBuffer && !this.videoAppendQueued_) {\n      this.delayedAudioAppendQueue_.push([options, doneFn]);\n      this.logger_(\"delayed audio append of \" + bytes.length + \" until video append\");\n      return;\n    } // In the case of certain errors, for instance, QUOTA_EXCEEDED_ERR, updateend will\n    // not be fired. This means that the queue will be blocked until the next action\n    // taken by the segment-loader. Provide a mechanism for segment-loader to handle\n    // these errors by calling the doneFn with the specific error.\n\n\n    var onError = doneFn;\n    pushQueue({\n      type: type,\n      sourceUpdater: this,\n      action: actions.appendBuffer(bytes, segmentInfo || {\n        mediaIndex: -1\n      }, onError),\n      doneFn: doneFn,\n      name: 'appendBuffer'\n    });\n\n    if (type === 'video') {\n      this.videoAppendQueued_ = true;\n\n      if (!this.delayedAudioAppendQueue_.length) {\n        return;\n      }\n\n      var queue = this.delayedAudioAppendQueue_.slice();\n      this.logger_(\"queuing delayed audio \" + queue.length + \" appendBuffers\");\n      this.delayedAudioAppendQueue_.length = 0;\n      queue.forEach(function (que) {\n        _this3.appendBuffer.apply(_this3, que);\n      });\n    }\n  }\n  /**\n   * Get the audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The audio buffer's buffered time range\n   */\n  ;\n\n  _proto.audioBuffered = function audioBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.audioBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.audioBuffer.buffered ? this.audioBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get the video buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         The video buffer's buffered time range\n   */\n  ;\n\n  _proto.videoBuffered = function videoBuffered() {\n    // no media source/source buffer or it isn't in the media sources\n    // source buffer list\n    if (!inSourceBuffers(this.mediaSource, this.videoBuffer)) {\n      return videojs.createTimeRange();\n    }\n\n    return this.videoBuffer.buffered ? this.videoBuffer.buffered : videojs.createTimeRange();\n  }\n  /**\n   * Get a combined video/audio buffer's buffered timerange.\n   *\n   * @return {TimeRange}\n   *         the combined time range\n   */\n  ;\n\n  _proto.buffered = function buffered() {\n    var video = inSourceBuffers(this.mediaSource, this.videoBuffer) ? this.videoBuffer : null;\n    var audio = inSourceBuffers(this.mediaSource, this.audioBuffer) ? this.audioBuffer : null;\n\n    if (audio && !video) {\n      return this.audioBuffered();\n    }\n\n    if (video && !audio) {\n      return this.videoBuffered();\n    }\n\n    return bufferIntersection(this.audioBuffered(), this.videoBuffered());\n  }\n  /**\n   * Add a callback to the queue that will set duration on the mediaSource.\n   *\n   * @param {number} duration\n   *        The duration to set\n   *\n   * @param {Function} [doneFn]\n   *        function to run after duration has been set.\n   */\n  ;\n\n  _proto.setDuration = function setDuration(duration, doneFn) {\n    if (doneFn === void 0) {\n      doneFn = noop;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.duration(duration),\n      name: 'duration',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Add a mediaSource endOfStream call to the queue\n   *\n   * @param {Error} [error]\n   *        Call endOfStream with an error\n   *\n   * @param {Function} [doneFn]\n   *        A function that should be called when the\n   *        endOfStream call has finished.\n   */\n  ;\n\n  _proto.endOfStream = function endOfStream(error, doneFn) {\n    if (error === void 0) {\n      error = null;\n    }\n\n    if (doneFn === void 0) {\n      doneFn = noop;\n    }\n\n    if (typeof error !== 'string') {\n      error = undefined;\n    } // In order to set the duration on the media source, it's necessary to wait for all\n    // source buffers to no longer be updating. \"If the updating attribute equals true on\n    // any SourceBuffer in sourceBuffers, then throw an InvalidStateError exception and\n    // abort these steps.\" (source: https://www.w3.org/TR/media-source/#attributes).\n\n\n    pushQueue({\n      type: 'mediaSource',\n      sourceUpdater: this,\n      action: actions.endOfStream(error),\n      name: 'endOfStream',\n      doneFn: doneFn\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeAudio = function removeAudio(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.audioBuffered().length || this.audioBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Queue an update to remove a time range from the buffer.\n   *\n   * @param {number} start where to start the removal\n   * @param {number} end where to end the removal\n   * @param {Function} [done=noop] optional callback to be executed when the remove\n   * operation is complete\n   * @see http://www.w3.org/TR/media-source/#widl-SourceBuffer-remove-void-double-start-unrestricted-double-end\n   */\n  ;\n\n  _proto.removeVideo = function removeVideo(start, end, done) {\n    if (done === void 0) {\n      done = noop;\n    }\n\n    if (!this.videoBuffered().length || this.videoBuffered().end(0) === 0) {\n      done();\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.remove(start, end),\n      doneFn: done,\n      name: 'remove'\n    });\n  }\n  /**\n   * Whether the underlying sourceBuffer is updating or not\n   *\n   * @return {boolean} the updating status of the SourceBuffer\n   */\n  ;\n\n  _proto.updating = function updating() {\n    // the audio/video source buffer is updating\n    if (_updating('audio', this) || _updating('video', this)) {\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Set/get the timestampoffset on the audio SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.audioTimestampOffset = function audioTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.audioBuffer && // no point in updating if it's the same\n    this.audioTimestampOffset_ !== offset) {\n      pushQueue({\n        type: 'audio',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.audioTimestampOffset_ = offset;\n    }\n\n    return this.audioTimestampOffset_;\n  }\n  /**\n   * Set/get the timestampoffset on the video SourceBuffer\n   *\n   * @return {number} the timestamp offset\n   */\n  ;\n\n  _proto.videoTimestampOffset = function videoTimestampOffset(offset) {\n    if (typeof offset !== 'undefined' && this.videoBuffer && // no point in updating if it's the same\n    this.videoTimestampOffset !== offset) {\n      pushQueue({\n        type: 'video',\n        sourceUpdater: this,\n        action: actions.timestampOffset(offset),\n        name: 'timestampOffset'\n      });\n      this.videoTimestampOffset_ = offset;\n    }\n\n    return this.videoTimestampOffset_;\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the audio queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.audioQueueCallback = function audioQueueCallback(callback) {\n    if (!this.audioBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'audio',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * Add a function to the queue that will be called\n   * when it is its turn to run in the video queue.\n   *\n   * @param {Function} callback\n   *        The callback to queue.\n   */\n  ;\n\n  _proto.videoQueueCallback = function videoQueueCallback(callback) {\n    if (!this.videoBuffer) {\n      return;\n    }\n\n    pushQueue({\n      type: 'video',\n      sourceUpdater: this,\n      action: actions.callback(callback),\n      name: 'callback'\n    });\n  }\n  /**\n   * dispose of the source updater and the underlying sourceBuffer\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this4 = this;\n\n    this.trigger('dispose');\n    bufferTypes.forEach(function (type) {\n      _this4.abort(type);\n\n      if (_this4.canRemoveSourceBuffer()) {\n        _this4.removeSourceBuffer(type);\n      } else {\n        _this4[type + \"QueueCallback\"](function () {\n          return cleanupBuffer(type, _this4);\n        });\n      }\n    });\n    this.videoAppendQueued_ = false;\n    this.delayedAudioAppendQueue_.length = 0;\n\n    if (this.sourceopenListener_) {\n      this.mediaSource.removeEventListener('sourceopen', this.sourceopenListener_);\n    }\n\n    this.off();\n  };\n\n  return SourceUpdater;\n}(videojs.EventTarget);\n\nvar uint8ToUtf8 = function uint8ToUtf8(uintArray) {\n  return decodeURIComponent(escape(String.fromCharCode.apply(null, uintArray)));\n};\n\nvar VTT_LINE_TERMINATORS = new Uint8Array('\\n\\n'.split('').map(function (_char3) {\n  return _char3.charCodeAt(0);\n}));\n\nvar NoVttJsError = /*#__PURE__*/function (_Error) {\n  _inheritsLoose(NoVttJsError, _Error);\n\n  function NoVttJsError() {\n    return _Error.call(this, 'Trying to parse received VTT cues, but there is no WebVTT. Make sure vtt.js is loaded.') || this;\n  }\n\n  return NoVttJsError;\n}( /*#__PURE__*/_wrapNativeSuper(Error));\n/**\n * An object that manages segment loading and appending.\n *\n * @class VTTSegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\n\nvar VTTSegmentLoader = /*#__PURE__*/function (_SegmentLoader) {\n  _inheritsLoose(VTTSegmentLoader, _SegmentLoader);\n\n  function VTTSegmentLoader(settings, options) {\n    var _this;\n\n    if (options === void 0) {\n      options = {};\n    }\n\n    _this = _SegmentLoader.call(this, settings, options) || this; // SegmentLoader requires a MediaSource be specified or it will throw an error;\n    // however, VTTSegmentLoader has no need of a media source, so delete the reference\n\n    _this.mediaSource_ = null;\n    _this.subtitlesTrack_ = null;\n    _this.loaderType_ = 'subtitle';\n    _this.featuresNativeTextTracks_ = settings.featuresNativeTextTracks;\n    _this.loadVttJs = settings.loadVttJs; // The VTT segment will have its own time mappings. Saving VTT segment timing info in\n    // the sync controller leads to improper behavior.\n\n    _this.shouldSaveSegmentTimingInfo_ = false;\n    return _this;\n  }\n\n  var _proto = VTTSegmentLoader.prototype;\n\n  _proto.createTransmuxer_ = function createTransmuxer_() {\n    // don't need to transmux any subtitles\n    return null;\n  }\n  /**\n   * Indicates which time ranges are buffered\n   *\n   * @return {TimeRange}\n   *         TimeRange object representing the current buffered ranges\n   */\n  ;\n\n  _proto.buffered_ = function buffered_() {\n    if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {\n      return videojs.createTimeRanges();\n    }\n\n    var cues = this.subtitlesTrack_.cues;\n    var start = cues[0].startTime;\n    var end = cues[cues.length - 1].startTime;\n    return videojs.createTimeRanges([[start, end]]);\n  }\n  /**\n   * Gets and sets init segment for the provided map\n   *\n   * @param {Object} map\n   *        The map object representing the init segment to get or set\n   * @param {boolean=} set\n   *        If true, the init segment for the provided map should be saved\n   * @return {Object}\n   *         map object for desired init segment\n   */\n  ;\n\n  _proto.initSegmentForMap = function initSegmentForMap(map, set) {\n    if (set === void 0) {\n      set = false;\n    }\n\n    if (!map) {\n      return null;\n    }\n\n    var id = initSegmentId(map);\n    var storedMap = this.initSegments_[id];\n\n    if (set && !storedMap && map.bytes) {\n      // append WebVTT line terminators to the media initialization segment if it exists\n      // to follow the WebVTT spec (https://w3c.github.io/webvtt/#file-structure) that\n      // requires two or more WebVTT line terminators between the WebVTT header and the\n      // rest of the file\n      var combinedByteLength = VTT_LINE_TERMINATORS.byteLength + map.bytes.byteLength;\n      var combinedSegment = new Uint8Array(combinedByteLength);\n      combinedSegment.set(map.bytes);\n      combinedSegment.set(VTT_LINE_TERMINATORS, map.bytes.byteLength);\n      this.initSegments_[id] = storedMap = {\n        resolvedUri: map.resolvedUri,\n        byterange: map.byterange,\n        bytes: combinedSegment\n      };\n    }\n\n    return storedMap || map;\n  }\n  /**\n   * Returns true if all configuration required for loading is present, otherwise false.\n   *\n   * @return {boolean} True if the all configuration is ready for loading\n   * @private\n   */\n  ;\n\n  _proto.couldBeginLoading_ = function couldBeginLoading_() {\n    return this.playlist_ && this.subtitlesTrack_ && !this.paused();\n  }\n  /**\n   * Once all the starting parameters have been specified, begin\n   * operation. This method should only be invoked from the INIT\n   * state.\n   *\n   * @private\n   */\n  ;\n\n  _proto.init_ = function init_() {\n    this.state = 'READY';\n    this.resetEverything();\n    return this.monitorBuffer_();\n  }\n  /**\n   * Set a subtitle track on the segment loader to add subtitles to\n   *\n   * @param {TextTrack=} track\n   *        The text track to add loaded subtitles to\n   * @return {TextTrack}\n   *        Returns the subtitles track\n   */\n  ;\n\n  _proto.track = function track(_track) {\n    if (typeof _track === 'undefined') {\n      return this.subtitlesTrack_;\n    }\n\n    this.subtitlesTrack_ = _track; // if we were unpaused but waiting for a sourceUpdater, start\n    // buffering now\n\n    if (this.state === 'INIT' && this.couldBeginLoading_()) {\n      this.init_();\n    }\n\n    return this.subtitlesTrack_;\n  }\n  /**\n   * Remove any data in the source buffer between start and end times\n   *\n   * @param {number} start - the start time of the region to remove from the buffer\n   * @param {number} end - the end time of the region to remove from the buffer\n   */\n  ;\n\n  _proto.remove = function remove(start, end) {\n    removeCuesFromTrack(start, end, this.subtitlesTrack_);\n  }\n  /**\n   * fill the buffer with segements unless the sourceBuffers are\n   * currently updating\n   *\n   * Note: this function should only ever be called by monitorBuffer_\n   * and never directly\n   *\n   * @private\n   */\n  ;\n\n  _proto.fillBuffer_ = function fillBuffer_() {\n    var _this2 = this; // see if we need to begin loading immediately\n\n\n    var segmentInfo = this.chooseNextRequest_();\n\n    if (!segmentInfo) {\n      return;\n    }\n\n    if (this.syncController_.timestampOffsetForTimeline(segmentInfo.timeline) === null) {\n      // We don't have the timestamp offset that we need to sync subtitles.\n      // Rerun on a timestamp offset or user interaction.\n      var checkTimestampOffset = function checkTimestampOffset() {\n        _this2.state = 'READY';\n\n        if (!_this2.paused()) {\n          // if not paused, queue a buffer check as soon as possible\n          _this2.monitorBuffer_();\n        }\n      };\n\n      this.syncController_.one('timestampoffset', checkTimestampOffset);\n      this.state = 'WAITING_ON_TIMELINE';\n      return;\n    }\n\n    this.loadSegment_(segmentInfo);\n  } // never set a timestamp offset for vtt segments.\n  ;\n\n  _proto.timestampOffsetForSegment_ = function timestampOffsetForSegment_() {\n    return null;\n  };\n\n  _proto.chooseNextRequest_ = function chooseNextRequest_() {\n    return this.skipEmptySegments_(_SegmentLoader.prototype.chooseNextRequest_.call(this));\n  }\n  /**\n   * Prevents the segment loader from requesting segments we know contain no subtitles\n   * by walking forward until we find the next segment that we don't know whether it is\n   * empty or not.\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @return {Object}\n   *         a segment info object that describes the current segment\n   */\n  ;\n\n  _proto.skipEmptySegments_ = function skipEmptySegments_(segmentInfo) {\n    while (segmentInfo && segmentInfo.segment.empty) {\n      // stop at the last possible segmentInfo\n      if (segmentInfo.mediaIndex + 1 >= segmentInfo.playlist.segments.length) {\n        segmentInfo = null;\n        break;\n      }\n\n      segmentInfo = this.generateSegmentInfo_({\n        playlist: segmentInfo.playlist,\n        mediaIndex: segmentInfo.mediaIndex + 1,\n        startOfSegment: segmentInfo.startOfSegment + segmentInfo.duration,\n        isSyncRequest: segmentInfo.isSyncRequest\n      });\n    }\n\n    return segmentInfo;\n  };\n\n  _proto.stopForError = function stopForError(error) {\n    this.error(error);\n    this.state = 'READY';\n    this.pause();\n    this.trigger('error');\n  }\n  /**\n   * append a decrypted segement to the SourceBuffer through a SourceUpdater\n   *\n   * @private\n   */\n  ;\n\n  _proto.segmentRequestFinished_ = function segmentRequestFinished_(error, simpleSegment, result) {\n    var _this3 = this;\n\n    if (!this.subtitlesTrack_) {\n      this.state = 'READY';\n      return;\n    }\n\n    this.saveTransferStats_(simpleSegment.stats); // the request was aborted\n\n    if (!this.pendingSegment_) {\n      this.state = 'READY';\n      this.mediaRequestsAborted += 1;\n      return;\n    }\n\n    if (error) {\n      if (error.code === REQUEST_ERRORS.TIMEOUT) {\n        this.handleTimeout_();\n      }\n\n      if (error.code === REQUEST_ERRORS.ABORTED) {\n        this.mediaRequestsAborted += 1;\n      } else {\n        this.mediaRequestsErrored += 1;\n      }\n\n      this.stopForError(error);\n      return;\n    }\n\n    var segmentInfo = this.pendingSegment_; // although the VTT segment loader bandwidth isn't really used, it's good to\n    // maintain functionality between segment loaders\n\n    this.saveBandwidthRelatedStats_(segmentInfo.duration, simpleSegment.stats); // if this request included a segment key, save that data in the cache\n\n    if (simpleSegment.key) {\n      this.segmentKey(simpleSegment.key, true);\n    }\n\n    this.state = 'APPENDING'; // used for tests\n\n    this.trigger('appending');\n    var segment = segmentInfo.segment;\n\n    if (segment.map) {\n      segment.map.bytes = simpleSegment.map.bytes;\n    }\n\n    segmentInfo.bytes = simpleSegment.bytes; // Make sure that vttjs has loaded, otherwise, load it and wait till it finished loading\n\n    if (typeof window$1.WebVTT !== 'function' && typeof this.loadVttJs === 'function') {\n      this.state = 'WAITING_ON_VTTJS'; // should be fine to call multiple times\n      // script will be loaded once but multiple listeners will be added to the queue, which is expected.\n\n      this.loadVttJs().then(function () {\n        return _this3.segmentRequestFinished_(error, simpleSegment, result);\n      }, function () {\n        return _this3.stopForError({\n          message: 'Error loading vtt.js'\n        });\n      });\n      return;\n    }\n\n    segment.requested = true;\n\n    try {\n      this.parseVTTCues_(segmentInfo);\n    } catch (e) {\n      this.stopForError({\n        message: e.message\n      });\n      return;\n    }\n\n    this.updateTimeMapping_(segmentInfo, this.syncController_.timelines[segmentInfo.timeline], this.playlist_);\n\n    if (segmentInfo.cues.length) {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.cues[0].startTime,\n        end: segmentInfo.cues[segmentInfo.cues.length - 1].endTime\n      };\n    } else {\n      segmentInfo.timingInfo = {\n        start: segmentInfo.startOfSegment,\n        end: segmentInfo.startOfSegment + segmentInfo.duration\n      };\n    }\n\n    if (segmentInfo.isSyncRequest) {\n      this.trigger('syncinfoupdate');\n      this.pendingSegment_ = null;\n      this.state = 'READY';\n      return;\n    }\n\n    segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n    this.mediaSecondsLoaded += segment.duration; // Create VTTCue instances for each cue in the new segment and add them to\n    // the subtitle track\n\n    segmentInfo.cues.forEach(function (cue) {\n      _this3.subtitlesTrack_.addCue(_this3.featuresNativeTextTracks_ ? new window$1.VTTCue(cue.startTime, cue.endTime, cue.text) : cue);\n    }); // Remove any duplicate cues from the subtitle track. The WebVTT spec allows\n    // cues to have identical time-intervals, but if the text is also identical\n    // we can safely assume it is a duplicate that can be removed (ex. when a cue\n    // \"overlaps\" VTT segments)\n\n    removeDuplicateCuesFromTrack(this.subtitlesTrack_);\n    this.handleAppendsDone_();\n  };\n\n  _proto.handleData_ = function handleData_() {// noop as we shouldn't be getting video/audio data captions\n    // that we do not support here.\n  };\n\n  _proto.updateTimingInfoEnd_ = function updateTimingInfoEnd_() {// noop\n  }\n  /**\n   * Uses the WebVTT parser to parse the segment response\n   *\n   * @throws NoVttJsError\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @private\n   */\n  ;\n\n  _proto.parseVTTCues_ = function parseVTTCues_(segmentInfo) {\n    var decoder;\n    var decodeBytesToString = false;\n\n    if (typeof window$1.WebVTT !== 'function') {\n      // caller is responsible for exception handling.\n      throw new NoVttJsError();\n    }\n\n    if (typeof window$1.TextDecoder === 'function') {\n      decoder = new window$1.TextDecoder('utf8');\n    } else {\n      decoder = window$1.WebVTT.StringDecoder();\n      decodeBytesToString = true;\n    }\n\n    var parser = new window$1.WebVTT.Parser(window$1, window$1.vttjs, decoder);\n    segmentInfo.cues = [];\n    segmentInfo.timestampmap = {\n      MPEGTS: 0,\n      LOCAL: 0\n    };\n    parser.oncue = segmentInfo.cues.push.bind(segmentInfo.cues);\n\n    parser.ontimestampmap = function (map) {\n      segmentInfo.timestampmap = map;\n    };\n\n    parser.onparsingerror = function (error) {\n      videojs.log.warn('Error encountered when parsing cues: ' + error.message);\n    };\n\n    if (segmentInfo.segment.map) {\n      var mapData = segmentInfo.segment.map.bytes;\n\n      if (decodeBytesToString) {\n        mapData = uint8ToUtf8(mapData);\n      }\n\n      parser.parse(mapData);\n    }\n\n    var segmentData = segmentInfo.bytes;\n\n    if (decodeBytesToString) {\n      segmentData = uint8ToUtf8(segmentData);\n    }\n\n    parser.parse(segmentData);\n    parser.flush();\n  }\n  /**\n   * Updates the start and end times of any cues parsed by the WebVTT parser using\n   * the information parsed from the X-TIMESTAMP-MAP header and a TS to media time mapping\n   * from the SyncController\n   *\n   * @param {Object} segmentInfo\n   *        a segment info object that describes the current segment\n   * @param {Object} mappingObj\n   *        object containing a mapping from TS to media time\n   * @param {Object} playlist\n   *        the playlist object containing the segment\n   * @private\n   */\n  ;\n\n  _proto.updateTimeMapping_ = function updateTimeMapping_(segmentInfo, mappingObj, playlist) {\n    var segment = segmentInfo.segment;\n\n    if (!mappingObj) {\n      // If the sync controller does not have a mapping of TS to Media Time for the\n      // timeline, then we don't have enough information to update the cue\n      // start/end times\n      return;\n    }\n\n    if (!segmentInfo.cues.length) {\n      // If there are no cues, we also do not have enough information to figure out\n      // segment timing. Mark that the segment contains no cues so we don't re-request\n      // an empty segment.\n      segment.empty = true;\n      return;\n    }\n\n    var timestampmap = segmentInfo.timestampmap;\n    var diff = timestampmap.MPEGTS / ONE_SECOND_IN_TS - timestampmap.LOCAL + mappingObj.mapping;\n    segmentInfo.cues.forEach(function (cue) {\n      // First convert cue time to TS time using the timestamp-map provided within the vtt\n      cue.startTime += diff;\n      cue.endTime += diff;\n    });\n\n    if (!playlist.syncInfo) {\n      var firstStart = segmentInfo.cues[0].startTime;\n      var lastStart = segmentInfo.cues[segmentInfo.cues.length - 1].startTime;\n      playlist.syncInfo = {\n        mediaSequence: playlist.mediaSequence + segmentInfo.mediaIndex,\n        time: Math.min(firstStart, lastStart - segment.duration)\n      };\n    }\n  };\n\n  return VTTSegmentLoader;\n}(SegmentLoader);\n/**\n * @file ad-cue-tags.js\n */\n\n/**\n * Searches for an ad cue that overlaps with the given mediaTime\n *\n * @param {Object} track\n *        the track to find the cue for\n *\n * @param {number} mediaTime\n *        the time to find the cue at\n *\n * @return {Object|null}\n *         the found cue or null\n */\n\n\nvar findAdCue = function findAdCue(track, mediaTime) {\n  var cues = track.cues;\n\n  for (var i = 0; i < cues.length; i++) {\n    var cue = cues[i];\n\n    if (mediaTime >= cue.adStartTime && mediaTime <= cue.adEndTime) {\n      return cue;\n    }\n  }\n\n  return null;\n};\n\nvar updateAdCues = function updateAdCues(media, track, offset) {\n  if (offset === void 0) {\n    offset = 0;\n  }\n\n  if (!media.segments) {\n    return;\n  }\n\n  var mediaTime = offset;\n  var cue;\n\n  for (var i = 0; i < media.segments.length; i++) {\n    var segment = media.segments[i];\n\n    if (!cue) {\n      // Since the cues will span for at least the segment duration, adding a fudge\n      // factor of half segment duration will prevent duplicate cues from being\n      // created when timing info is not exact (e.g. cue start time initialized\n      // at 10.006677, but next call mediaTime is 10.003332 )\n      cue = findAdCue(track, mediaTime + segment.duration / 2);\n    }\n\n    if (cue) {\n      if ('cueIn' in segment) {\n        // Found a CUE-IN so end the cue\n        cue.endTime = mediaTime;\n        cue.adEndTime = mediaTime;\n        mediaTime += segment.duration;\n        cue = null;\n        continue;\n      }\n\n      if (mediaTime < cue.endTime) {\n        // Already processed this mediaTime for this cue\n        mediaTime += segment.duration;\n        continue;\n      } // otherwise extend cue until a CUE-IN is found\n\n\n      cue.endTime += segment.duration;\n    } else {\n      if ('cueOut' in segment) {\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, segment.cueOut);\n        cue.adStartTime = mediaTime; // Assumes tag format to be\n        // #EXT-X-CUE-OUT:30\n\n        cue.adEndTime = mediaTime + parseFloat(segment.cueOut);\n        track.addCue(cue);\n      }\n\n      if ('cueOutCont' in segment) {\n        // Entered into the middle of an ad cue\n        // Assumes tag formate to be\n        // #EXT-X-CUE-OUT-CONT:10/30\n        var _segment$cueOutCont$s = segment.cueOutCont.split('/').map(parseFloat),\n            adOffset = _segment$cueOutCont$s[0],\n            adTotal = _segment$cueOutCont$s[1];\n\n        cue = new window$1.VTTCue(mediaTime, mediaTime + segment.duration, '');\n        cue.adStartTime = mediaTime - adOffset;\n        cue.adEndTime = cue.adStartTime + adTotal;\n        track.addCue(cue);\n      }\n    }\n\n    mediaTime += segment.duration;\n  }\n}; // synchronize expired playlist segments.\n// the max media sequence diff is 48 hours of live stream\n// content with two second segments. Anything larger than that\n// will likely be invalid.\n\n\nvar MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC = 86400;\nvar syncPointStrategies = [// Stategy \"VOD\": Handle the VOD-case where the sync-point is *always*\n//                the equivalence display-time 0 === segment-index 0\n{\n  name: 'VOD',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (duration !== Infinity) {\n      var syncPoint = {\n        time: 0,\n        segmentIndex: 0,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}, // Stategy \"ProgramDateTime\": We have a program-date-time tag in this playlist\n{\n  name: 'ProgramDateTime',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (!Object.keys(syncController.timelineToDatetimeMappings).length) {\n      return null;\n    }\n\n    var syncPoint = null;\n    var lastDistance = null;\n    var partsAndSegments = getPartsAndSegments(playlist);\n    currentTime = currentTime || 0;\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var datetimeMapping = syncController.timelineToDatetimeMappings[segment.timeline];\n\n      if (!datetimeMapping || !segment.dateTimeObject) {\n        continue;\n      }\n\n      var segmentTime = segment.dateTimeObject.getTime() / 1000;\n      var start = segmentTime + datetimeMapping; // take part duration into account.\n\n      if (segment.parts && typeof partAndSegment.partIndex === 'number') {\n        for (var z = 0; z < partAndSegment.partIndex; z++) {\n          start += segment.parts[z].duration;\n        }\n      }\n\n      var distance = Math.abs(currentTime - start); // Once the distance begins to increase, or if distance is 0, we have passed\n      // currentTime and can stop looking for better candidates\n\n      if (lastDistance !== null && (distance === 0 || lastDistance < distance)) {\n        break;\n      }\n\n      lastDistance = distance;\n      syncPoint = {\n        time: start,\n        segmentIndex: partAndSegment.segmentIndex,\n        partIndex: partAndSegment.partIndex\n      };\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Segment\": We have a known time mapping for a timeline and a\n//                    segment in the current timeline with timing data\n{\n  name: 'Segment',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    var lastDistance = null;\n    currentTime = currentTime || 0;\n    var partsAndSegments = getPartsAndSegments(playlist);\n\n    for (var i = 0; i < partsAndSegments.length; i++) {\n      // start from the end and loop backwards for live\n      // or start from the front and loop forwards for non-live\n      var index = playlist.endList || currentTime === 0 ? i : partsAndSegments.length - (i + 1);\n      var partAndSegment = partsAndSegments[index];\n      var segment = partAndSegment.segment;\n      var start = partAndSegment.part && partAndSegment.part.start || segment && segment.start;\n\n      if (segment.timeline === currentTimeline && typeof start !== 'undefined') {\n        var distance = Math.abs(currentTime - start); // Once the distance begins to increase, we have passed\n        // currentTime and can stop looking for better candidates\n\n        if (lastDistance !== null && lastDistance < distance) {\n          break;\n        }\n\n        if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n          lastDistance = distance;\n          syncPoint = {\n            time: start,\n            segmentIndex: partAndSegment.segmentIndex,\n            partIndex: partAndSegment.partIndex\n          };\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Discontinuity\": We have a discontinuity with a known\n//                          display-time\n{\n  name: 'Discontinuity',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    var syncPoint = null;\n    currentTime = currentTime || 0;\n\n    if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      var lastDistance = null;\n\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var discontinuitySync = syncController.discontinuities[discontinuity];\n\n        if (discontinuitySync) {\n          var distance = Math.abs(currentTime - discontinuitySync.time); // Once the distance begins to increase, we have passed\n          // currentTime and can stop looking for better candidates\n\n          if (lastDistance !== null && lastDistance < distance) {\n            break;\n          }\n\n          if (!syncPoint || lastDistance === null || lastDistance >= distance) {\n            lastDistance = distance;\n            syncPoint = {\n              time: discontinuitySync.time,\n              segmentIndex: segmentIndex,\n              partIndex: null\n            };\n          }\n        }\n      }\n    }\n\n    return syncPoint;\n  }\n}, // Stategy \"Playlist\": We have a playlist with a known mapping of\n//                     segment index to display time\n{\n  name: 'Playlist',\n  run: function run(syncController, playlist, duration, currentTimeline, currentTime) {\n    if (playlist.syncInfo) {\n      var syncPoint = {\n        time: playlist.syncInfo.time,\n        segmentIndex: playlist.syncInfo.mediaSequence - playlist.mediaSequence,\n        partIndex: null\n      };\n      return syncPoint;\n    }\n\n    return null;\n  }\n}];\n\nvar SyncController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(SyncController, _videojs$EventTarget);\n\n  function SyncController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this; // ...for synching across variants\n\n    _this.timelines = [];\n    _this.discontinuities = [];\n    _this.timelineToDatetimeMappings = {};\n    _this.logger_ = logger('SyncController');\n    return _this;\n  }\n  /**\n   * Find a sync-point for the playlist specified\n   *\n   * A sync-point is defined as a known mapping from display-time to\n   * a segment-index in the current playlist.\n   *\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinite if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Object}\n   *          A sync-point object\n   */\n\n\n  var _proto = SyncController.prototype;\n\n  _proto.getSyncPoint = function getSyncPoint(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = this.runStrategies_(playlist, duration, currentTimeline, currentTime);\n\n    if (!syncPoints.length) {\n      // Signal that we need to attempt to get a sync-point manually\n      // by fetching a segment in the playlist and constructing\n      // a sync-point from that information\n      return null;\n    } // Now find the sync-point that is closest to the currentTime because\n    // that should result in the most accurate guess about which segment\n    // to fetch\n\n\n    return this.selectSyncPoint_(syncPoints, {\n      key: 'time',\n      value: currentTime\n    });\n  }\n  /**\n   * Calculate the amount of time that has expired off the playlist during playback\n   *\n   * @param {Playlist} playlist\n   *        Playlist object to calculate expired from\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playling a live source)\n   * @return {number|null}\n   *          The amount of time that has expired off the playlist during playback. Null\n   *          if no sync-points for the playlist can be found.\n   */\n  ;\n\n  _proto.getExpiredTime = function getExpiredTime(playlist, duration) {\n    if (!playlist || !playlist.segments) {\n      return null;\n    }\n\n    var syncPoints = this.runStrategies_(playlist, duration, playlist.discontinuitySequence, 0); // Without sync-points, there is not enough information to determine the expired time\n\n    if (!syncPoints.length) {\n      return null;\n    }\n\n    var syncPoint = this.selectSyncPoint_(syncPoints, {\n      key: 'segmentIndex',\n      value: 0\n    }); // If the sync-point is beyond the start of the playlist, we want to subtract the\n    // duration from index 0 to syncPoint.segmentIndex instead of adding.\n\n    if (syncPoint.segmentIndex > 0) {\n      syncPoint.time *= -1;\n    }\n\n    return Math.abs(syncPoint.time + sumDurations({\n      defaultDuration: playlist.targetDuration,\n      durationList: playlist.segments,\n      startIndex: syncPoint.segmentIndex,\n      endIndex: 0\n    }));\n  }\n  /**\n   * Runs each sync-point strategy and returns a list of sync-points returned by the\n   * strategies\n   *\n   * @private\n   * @param {Playlist} playlist\n   *        The playlist that needs a sync-point\n   * @param {number} duration\n   *        Duration of the MediaSource (Infinity if playing a live source)\n   * @param {number} currentTimeline\n   *        The last timeline from which a segment was loaded\n   * @return {Array}\n   *          A list of sync-point objects\n   */\n  ;\n\n  _proto.runStrategies_ = function runStrategies_(playlist, duration, currentTimeline, currentTime) {\n    var syncPoints = []; // Try to find a sync-point in by utilizing various strategies...\n\n    for (var i = 0; i < syncPointStrategies.length; i++) {\n      var strategy = syncPointStrategies[i];\n      var syncPoint = strategy.run(this, playlist, duration, currentTimeline, currentTime);\n\n      if (syncPoint) {\n        syncPoint.strategy = strategy.name;\n        syncPoints.push({\n          strategy: strategy.name,\n          syncPoint: syncPoint\n        });\n      }\n    }\n\n    return syncPoints;\n  }\n  /**\n   * Selects the sync-point nearest the specified target\n   *\n   * @private\n   * @param {Array} syncPoints\n   *        List of sync-points to select from\n   * @param {Object} target\n   *        Object specifying the property and value we are targeting\n   * @param {string} target.key\n   *        Specifies the property to target. Must be either 'time' or 'segmentIndex'\n   * @param {number} target.value\n   *        The value to target for the specified key.\n   * @return {Object}\n   *          The sync-point nearest the target\n   */\n  ;\n\n  _proto.selectSyncPoint_ = function selectSyncPoint_(syncPoints, target) {\n    var bestSyncPoint = syncPoints[0].syncPoint;\n    var bestDistance = Math.abs(syncPoints[0].syncPoint[target.key] - target.value);\n    var bestStrategy = syncPoints[0].strategy;\n\n    for (var i = 1; i < syncPoints.length; i++) {\n      var newDistance = Math.abs(syncPoints[i].syncPoint[target.key] - target.value);\n\n      if (newDistance < bestDistance) {\n        bestDistance = newDistance;\n        bestSyncPoint = syncPoints[i].syncPoint;\n        bestStrategy = syncPoints[i].strategy;\n      }\n    }\n\n    this.logger_(\"syncPoint for [\" + target.key + \": \" + target.value + \"] chosen with strategy\" + (\" [\" + bestStrategy + \"]: [time:\" + bestSyncPoint.time + \",\") + (\" segmentIndex:\" + bestSyncPoint.segmentIndex) + (typeof bestSyncPoint.partIndex === 'number' ? \",partIndex:\" + bestSyncPoint.partIndex : '') + ']');\n    return bestSyncPoint;\n  }\n  /**\n   * Save any meta-data present on the segments when segments leave\n   * the live window to the playlist to allow for synchronization at the\n   * playlist level later.\n   *\n   * @param {Playlist} oldPlaylist - The previous active playlist\n   * @param {Playlist} newPlaylist - The updated and most current playlist\n   */\n  ;\n\n  _proto.saveExpiredSegmentInfo = function saveExpiredSegmentInfo(oldPlaylist, newPlaylist) {\n    var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence; // Ignore large media sequence gaps\n\n    if (mediaSequenceDiff > MAX_MEDIA_SEQUENCE_DIFF_FOR_SYNC) {\n      videojs.log.warn(\"Not saving expired segment info. Media sequence gap \" + mediaSequenceDiff + \" is too large.\");\n      return;\n    } // When a segment expires from the playlist and it has a start time\n    // save that information as a possible sync-point reference in future\n\n\n    for (var i = mediaSequenceDiff - 1; i >= 0; i--) {\n      var lastRemovedSegment = oldPlaylist.segments[i];\n\n      if (lastRemovedSegment && typeof lastRemovedSegment.start !== 'undefined') {\n        newPlaylist.syncInfo = {\n          mediaSequence: oldPlaylist.mediaSequence + i,\n          time: lastRemovedSegment.start\n        };\n        this.logger_(\"playlist refresh sync: [time:\" + newPlaylist.syncInfo.time + \",\" + (\" mediaSequence: \" + newPlaylist.syncInfo.mediaSequence + \"]\"));\n        this.trigger('syncinfoupdate');\n        break;\n      }\n    }\n  }\n  /**\n   * Save the mapping from playlist's ProgramDateTime to display. This should only happen\n   * before segments start to load.\n   *\n   * @param {Playlist} playlist - The currently active playlist\n   */\n  ;\n\n  _proto.setDateTimeMappingForStart = function setDateTimeMappingForStart(playlist) {\n    // It's possible for the playlist to be updated before playback starts, meaning time\n    // zero is not yet set. If, during these playlist refreshes, a discontinuity is\n    // crossed, then the old time zero mapping (for the prior timeline) would be retained\n    // unless the mappings are cleared.\n    this.timelineToDatetimeMappings = {};\n\n    if (playlist.segments && playlist.segments.length && playlist.segments[0].dateTimeObject) {\n      var firstSegment = playlist.segments[0];\n      var playlistTimestamp = firstSegment.dateTimeObject.getTime() / 1000;\n      this.timelineToDatetimeMappings[firstSegment.timeline] = -playlistTimestamp;\n    }\n  }\n  /**\n   * Calculates and saves timeline mappings, playlist sync info, and segment timing values\n   * based on the latest timing information.\n   *\n   * @param {Object} options\n   *        Options object\n   * @param {SegmentInfo} options.segmentInfo\n   *        The current active request information\n   * @param {boolean} options.shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved for timeline mapping and program date time mappings.\n   */\n  ;\n\n  _proto.saveSegmentTimingInfo = function saveSegmentTimingInfo(_ref) {\n    var segmentInfo = _ref.segmentInfo,\n        shouldSaveTimelineMapping = _ref.shouldSaveTimelineMapping;\n    var didCalculateSegmentTimeMapping = this.calculateSegmentTimeMapping_(segmentInfo, segmentInfo.timingInfo, shouldSaveTimelineMapping);\n    var segment = segmentInfo.segment;\n\n    if (didCalculateSegmentTimeMapping) {\n      this.saveDiscontinuitySyncInfo_(segmentInfo); // If the playlist does not have sync information yet, record that information\n      // now with segment timing information\n\n      if (!segmentInfo.playlist.syncInfo) {\n        segmentInfo.playlist.syncInfo = {\n          mediaSequence: segmentInfo.playlist.mediaSequence + segmentInfo.mediaIndex,\n          time: segment.start\n        };\n      }\n    }\n\n    var dateTime = segment.dateTimeObject;\n\n    if (segment.discontinuity && shouldSaveTimelineMapping && dateTime) {\n      this.timelineToDatetimeMappings[segment.timeline] = -(dateTime.getTime() / 1000);\n    }\n  };\n\n  _proto.timestampOffsetForTimeline = function timestampOffsetForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].time;\n  };\n\n  _proto.mappingForTimeline = function mappingForTimeline(timeline) {\n    if (typeof this.timelines[timeline] === 'undefined') {\n      return null;\n    }\n\n    return this.timelines[timeline].mapping;\n  }\n  /**\n   * Use the \"media time\" for a segment to generate a mapping to \"display time\" and\n   * save that display time to the segment.\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo\n   *        The current active request information\n   * @param {Object} timingInfo\n   *        The start and end time of the current segment in \"media time\"\n   * @param {boolean} shouldSaveTimelineMapping\n   *        If there's a timeline change, determines if the timeline mapping should be\n   *        saved in timelines.\n   * @return {boolean}\n   *          Returns false if segment time mapping could not be calculated\n   */\n  ;\n\n  _proto.calculateSegmentTimeMapping_ = function calculateSegmentTimeMapping_(segmentInfo, timingInfo, shouldSaveTimelineMapping) {\n    // TODO: remove side effects\n    var segment = segmentInfo.segment;\n    var part = segmentInfo.part;\n    var mappingObj = this.timelines[segmentInfo.timeline];\n    var start;\n    var end;\n\n    if (typeof segmentInfo.timestampOffset === 'number') {\n      mappingObj = {\n        time: segmentInfo.startOfSegment,\n        mapping: segmentInfo.startOfSegment - timingInfo.start\n      };\n\n      if (shouldSaveTimelineMapping) {\n        this.timelines[segmentInfo.timeline] = mappingObj;\n        this.trigger('timestampoffset');\n        this.logger_(\"time mapping for timeline \" + segmentInfo.timeline + \": \" + (\"[time: \" + mappingObj.time + \"] [mapping: \" + mappingObj.mapping + \"]\"));\n      }\n\n      start = segmentInfo.startOfSegment;\n      end = timingInfo.end + mappingObj.mapping;\n    } else if (mappingObj) {\n      start = timingInfo.start + mappingObj.mapping;\n      end = timingInfo.end + mappingObj.mapping;\n    } else {\n      return false;\n    }\n\n    if (part) {\n      part.start = start;\n      part.end = end;\n    } // If we don't have a segment start yet or the start value we got\n    // is less than our current segment.start value, save a new start value.\n    // We have to do this because parts will have segment timing info saved\n    // multiple times and we want segment start to be the earliest part start\n    // value for that segment.\n\n\n    if (!segment.start || start < segment.start) {\n      segment.start = start;\n    }\n\n    segment.end = end;\n    return true;\n  }\n  /**\n   * Each time we have discontinuity in the playlist, attempt to calculate the location\n   * in display of the start of the discontinuity and save that. We also save an accuracy\n   * value so that we save values with the most accuracy (closest to 0.)\n   *\n   * @private\n   * @param {SegmentInfo} segmentInfo - The current active request information\n   */\n  ;\n\n  _proto.saveDiscontinuitySyncInfo_ = function saveDiscontinuitySyncInfo_(segmentInfo) {\n    var playlist = segmentInfo.playlist;\n    var segment = segmentInfo.segment; // If the current segment is a discontinuity then we know exactly where\n    // the start of the range and it's accuracy is 0 (greater accuracy values\n    // mean more approximation)\n\n    if (segment.discontinuity) {\n      this.discontinuities[segment.timeline] = {\n        time: segment.start,\n        accuracy: 0\n      };\n    } else if (playlist.discontinuityStarts && playlist.discontinuityStarts.length) {\n      // Search for future discontinuities that we can provide better timing\n      // information for and save that information for sync purposes\n      for (var i = 0; i < playlist.discontinuityStarts.length; i++) {\n        var segmentIndex = playlist.discontinuityStarts[i];\n        var discontinuity = playlist.discontinuitySequence + i + 1;\n        var mediaIndexDiff = segmentIndex - segmentInfo.mediaIndex;\n        var accuracy = Math.abs(mediaIndexDiff);\n\n        if (!this.discontinuities[discontinuity] || this.discontinuities[discontinuity].accuracy > accuracy) {\n          var time = void 0;\n\n          if (mediaIndexDiff < 0) {\n            time = segment.start - sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex,\n              endIndex: segmentIndex\n            });\n          } else {\n            time = segment.end + sumDurations({\n              defaultDuration: playlist.targetDuration,\n              durationList: playlist.segments,\n              startIndex: segmentInfo.mediaIndex + 1,\n              endIndex: segmentIndex\n            });\n          }\n\n          this.discontinuities[discontinuity] = {\n            time: time,\n            accuracy: accuracy\n          };\n        }\n      }\n    }\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.off();\n  };\n\n  return SyncController;\n}(videojs.EventTarget);\n/**\n * The TimelineChangeController acts as a source for segment loaders to listen for and\n * keep track of latest and pending timeline changes. This is useful to ensure proper\n * sync, as each loader may need to make a consideration for what timeline the other\n * loader is on before making changes which could impact the other loader's media.\n *\n * @class TimelineChangeController\n * @extends videojs.EventTarget\n */\n\n\nvar TimelineChangeController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(TimelineChangeController, _videojs$EventTarget);\n\n  function TimelineChangeController() {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    _this.pendingTimelineChanges_ = {};\n    _this.lastTimelineChanges_ = {};\n    return _this;\n  }\n\n  var _proto = TimelineChangeController.prototype;\n\n  _proto.clearPendingTimelineChange = function clearPendingTimelineChange(type) {\n    this.pendingTimelineChanges_[type] = null;\n    this.trigger('pendingtimelinechange');\n  };\n\n  _proto.pendingTimelineChange = function pendingTimelineChange(_ref) {\n    var type = _ref.type,\n        from = _ref.from,\n        to = _ref.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.pendingTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      this.trigger('pendingtimelinechange');\n    }\n\n    return this.pendingTimelineChanges_[type];\n  };\n\n  _proto.lastTimelineChange = function lastTimelineChange(_ref2) {\n    var type = _ref2.type,\n        from = _ref2.from,\n        to = _ref2.to;\n\n    if (typeof from === 'number' && typeof to === 'number') {\n      this.lastTimelineChanges_[type] = {\n        type: type,\n        from: from,\n        to: to\n      };\n      delete this.pendingTimelineChanges_[type];\n      this.trigger('timelinechange');\n    }\n\n    return this.lastTimelineChanges_[type];\n  };\n\n  _proto.dispose = function dispose() {\n    this.trigger('dispose');\n    this.pendingTimelineChanges_ = {};\n    this.lastTimelineChanges_ = {};\n    this.off();\n  };\n\n  return TimelineChangeController;\n}(videojs.EventTarget);\n/* rollup-plugin-worker-factory start for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n\n\nvar workerCode = transform(getWorkerString(function () {\n  var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};\n\n  function createCommonjsModule(fn, basedir, module) {\n    return module = {\n      path: basedir,\n      exports: {},\n      require: function require(path, base) {\n        return commonjsRequire(path, base === undefined || base === null ? module.path : base);\n      }\n    }, fn(module, module.exports), module.exports;\n  }\n\n  function commonjsRequire() {\n    throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');\n  }\n\n  var createClass = createCommonjsModule(function (module) {\n    function _defineProperties(target, props) {\n      for (var i = 0; i < props.length; i++) {\n        var descriptor = props[i];\n        descriptor.enumerable = descriptor.enumerable || false;\n        descriptor.configurable = true;\n        if (\"value\" in descriptor) descriptor.writable = true;\n        Object.defineProperty(target, descriptor.key, descriptor);\n      }\n    }\n\n    function _createClass(Constructor, protoProps, staticProps) {\n      if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n      if (staticProps) _defineProperties(Constructor, staticProps);\n      return Constructor;\n    }\n\n    module.exports = _createClass;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var setPrototypeOf = createCommonjsModule(function (module) {\n    function _setPrototypeOf(o, p) {\n      module.exports = _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n        o.__proto__ = p;\n        return o;\n      };\n\n      module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n      return _setPrototypeOf(o, p);\n    }\n\n    module.exports = _setPrototypeOf;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  var inheritsLoose = createCommonjsModule(function (module) {\n    function _inheritsLoose(subClass, superClass) {\n      subClass.prototype = Object.create(superClass.prototype);\n      subClass.prototype.constructor = subClass;\n      setPrototypeOf(subClass, superClass);\n    }\n\n    module.exports = _inheritsLoose;\n    module.exports[\"default\"] = module.exports, module.exports.__esModule = true;\n  });\n  /**\n   * @file stream.js\n   */\n\n  /**\n   * A lightweight readable stream implemention that handles event dispatching.\n   *\n   * @class Stream\n   */\n\n  var Stream = /*#__PURE__*/function () {\n    function Stream() {\n      this.listeners = {};\n    }\n    /**\n     * Add a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener the callback to be invoked when an event of\n     * the specified type occurs\n     */\n\n\n    var _proto = Stream.prototype;\n\n    _proto.on = function on(type, listener) {\n      if (!this.listeners[type]) {\n        this.listeners[type] = [];\n      }\n\n      this.listeners[type].push(listener);\n    }\n    /**\n     * Remove a listener for a specified event type.\n     *\n     * @param {string} type the event name\n     * @param {Function} listener  a function previously registered for this\n     * type of event through `on`\n     * @return {boolean} if we could turn it off or not\n     */\n    ;\n\n    _proto.off = function off(type, listener) {\n      if (!this.listeners[type]) {\n        return false;\n      }\n\n      var index = this.listeners[type].indexOf(listener); // TODO: which is better?\n      // In Video.js we slice listener functions\n      // on trigger so that it does not mess up the order\n      // while we loop through.\n      //\n      // Here we slice on off so that the loop in trigger\n      // can continue using it's old reference to loop without\n      // messing up the order.\n\n      this.listeners[type] = this.listeners[type].slice(0);\n      this.listeners[type].splice(index, 1);\n      return index > -1;\n    }\n    /**\n     * Trigger an event of the specified type on this stream. Any additional\n     * arguments to this function are passed as parameters to event listeners.\n     *\n     * @param {string} type the event name\n     */\n    ;\n\n    _proto.trigger = function trigger(type) {\n      var callbacks = this.listeners[type];\n\n      if (!callbacks) {\n        return;\n      } // Slicing the arguments on every invocation of this method\n      // can add a significant amount of overhead. Avoid the\n      // intermediate object creation for the common case of a\n      // single callback argument\n\n\n      if (arguments.length === 2) {\n        var length = callbacks.length;\n\n        for (var i = 0; i < length; ++i) {\n          callbacks[i].call(this, arguments[1]);\n        }\n      } else {\n        var args = Array.prototype.slice.call(arguments, 1);\n        var _length = callbacks.length;\n\n        for (var _i = 0; _i < _length; ++_i) {\n          callbacks[_i].apply(this, args);\n        }\n      }\n    }\n    /**\n     * Destroys the stream and cleans up.\n     */\n    ;\n\n    _proto.dispose = function dispose() {\n      this.listeners = {};\n    }\n    /**\n     * Forwards all `data` events on this stream to the destination stream. The\n     * destination stream should provide a method `push` to receive the data\n     * events as they arrive.\n     *\n     * @param {Stream} destination the stream that will receive all `data` events\n     * @see http://nodejs.org/api/stream.html#stream_readable_pipe_destination_options\n     */\n    ;\n\n    _proto.pipe = function pipe(destination) {\n      this.on('data', function (data) {\n        destination.push(data);\n      });\n    };\n\n    return Stream;\n  }();\n  /*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */\n\n  /**\n   * Returns the subarray of a Uint8Array without PKCS#7 padding.\n   *\n   * @param padded {Uint8Array} unencrypted bytes that have been padded\n   * @return {Uint8Array} the unpadded bytes\n   * @see http://tools.ietf.org/html/rfc5652\n   */\n\n\n  function unpad(padded) {\n    return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);\n  }\n  /*! @name aes-decrypter @version 3.1.3 @license Apache-2.0 */\n\n  /**\n   * @file aes.js\n   *\n   * This file contains an adaptation of the AES decryption algorithm\n   * from the Standford Javascript Cryptography Library. That work is\n   * covered by the following copyright and permissions notice:\n   *\n   * Copyright 2009-2010 Emily Stark, Mike Hamburg, Dan Boneh.\n   * All rights reserved.\n   *\n   * Redistribution and use in source and binary forms, with or without\n   * modification, are permitted provided that the following conditions are\n   * met:\n   *\n   * 1. Redistributions of source code must retain the above copyright\n   *    notice, this list of conditions and the following disclaimer.\n   *\n   * 2. Redistributions in binary form must reproduce the above\n   *    copyright notice, this list of conditions and the following\n   *    disclaimer in the documentation and/or other materials provided\n   *    with the distribution.\n   *\n   * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR\n   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n   * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR CONTRIBUTORS BE\n   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR\n   * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,\n   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE\n   * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN\n   * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n   *\n   * The views and conclusions contained in the software and documentation\n   * are those of the authors and should not be interpreted as representing\n   * official policies, either expressed or implied, of the authors.\n   */\n\n  /**\n   * Expand the S-box tables.\n   *\n   * @private\n   */\n\n\n  var precompute = function precompute() {\n    var tables = [[[], [], [], [], []], [[], [], [], [], []]];\n    var encTable = tables[0];\n    var decTable = tables[1];\n    var sbox = encTable[4];\n    var sboxInv = decTable[4];\n    var i;\n    var x;\n    var xInv;\n    var d = [];\n    var th = [];\n    var x2;\n    var x4;\n    var x8;\n    var s;\n    var tEnc;\n    var tDec; // Compute double and third tables\n\n    for (i = 0; i < 256; i++) {\n      th[(d[i] = i << 1 ^ (i >> 7) * 283) ^ i] = i;\n    }\n\n    for (x = xInv = 0; !sbox[x]; x ^= x2 || 1, xInv = th[xInv] || 1) {\n      // Compute sbox\n      s = xInv ^ xInv << 1 ^ xInv << 2 ^ xInv << 3 ^ xInv << 4;\n      s = s >> 8 ^ s & 255 ^ 99;\n      sbox[x] = s;\n      sboxInv[s] = x; // Compute MixColumns\n\n      x8 = d[x4 = d[x2 = d[x]]];\n      tDec = x8 * 0x1010101 ^ x4 * 0x10001 ^ x2 * 0x101 ^ x * 0x1010100;\n      tEnc = d[s] * 0x101 ^ s * 0x1010100;\n\n      for (i = 0; i < 4; i++) {\n        encTable[i][x] = tEnc = tEnc << 24 ^ tEnc >>> 8;\n        decTable[i][s] = tDec = tDec << 24 ^ tDec >>> 8;\n      }\n    } // Compactify. Considerable speedup on Firefox.\n\n\n    for (i = 0; i < 5; i++) {\n      encTable[i] = encTable[i].slice(0);\n      decTable[i] = decTable[i].slice(0);\n    }\n\n    return tables;\n  };\n\n  var aesTables = null;\n  /**\n   * Schedule out an AES key for both encryption and decryption. This\n   * is a low-level class. Use a cipher mode to do bulk encryption.\n   *\n   * @class AES\n   * @param key {Array} The key as an array of 4, 6 or 8 words.\n   */\n\n  var AES = /*#__PURE__*/function () {\n    function AES(key) {\n      /**\n      * The expanded S-box and inverse S-box tables. These will be computed\n      * on the client so that we don't have to send them down the wire.\n      *\n      * There are two tables, _tables[0] is for encryption and\n      * _tables[1] is for decryption.\n      *\n      * The first 4 sub-tables are the expanded S-box with MixColumns. The\n      * last (_tables[01][4]) is the S-box itself.\n      *\n      * @private\n      */\n      // if we have yet to precompute the S-box tables\n      // do so now\n      if (!aesTables) {\n        aesTables = precompute();\n      } // then make a copy of that object for use\n\n\n      this._tables = [[aesTables[0][0].slice(), aesTables[0][1].slice(), aesTables[0][2].slice(), aesTables[0][3].slice(), aesTables[0][4].slice()], [aesTables[1][0].slice(), aesTables[1][1].slice(), aesTables[1][2].slice(), aesTables[1][3].slice(), aesTables[1][4].slice()]];\n      var i;\n      var j;\n      var tmp;\n      var sbox = this._tables[0][4];\n      var decTable = this._tables[1];\n      var keyLen = key.length;\n      var rcon = 1;\n\n      if (keyLen !== 4 && keyLen !== 6 && keyLen !== 8) {\n        throw new Error('Invalid aes key size');\n      }\n\n      var encKey = key.slice(0);\n      var decKey = [];\n      this._key = [encKey, decKey]; // schedule encryption keys\n\n      for (i = keyLen; i < 4 * keyLen + 28; i++) {\n        tmp = encKey[i - 1]; // apply sbox\n\n        if (i % keyLen === 0 || keyLen === 8 && i % keyLen === 4) {\n          tmp = sbox[tmp >>> 24] << 24 ^ sbox[tmp >> 16 & 255] << 16 ^ sbox[tmp >> 8 & 255] << 8 ^ sbox[tmp & 255]; // shift rows and add rcon\n\n          if (i % keyLen === 0) {\n            tmp = tmp << 8 ^ tmp >>> 24 ^ rcon << 24;\n            rcon = rcon << 1 ^ (rcon >> 7) * 283;\n          }\n        }\n\n        encKey[i] = encKey[i - keyLen] ^ tmp;\n      } // schedule decryption keys\n\n\n      for (j = 0; i; j++, i--) {\n        tmp = encKey[j & 3 ? i : i - 4];\n\n        if (i <= 4 || j < 4) {\n          decKey[j] = tmp;\n        } else {\n          decKey[j] = decTable[0][sbox[tmp >>> 24]] ^ decTable[1][sbox[tmp >> 16 & 255]] ^ decTable[2][sbox[tmp >> 8 & 255]] ^ decTable[3][sbox[tmp & 255]];\n        }\n      }\n    }\n    /**\n     * Decrypt 16 bytes, specified as four 32-bit words.\n     *\n     * @param {number} encrypted0 the first word to decrypt\n     * @param {number} encrypted1 the second word to decrypt\n     * @param {number} encrypted2 the third word to decrypt\n     * @param {number} encrypted3 the fourth word to decrypt\n     * @param {Int32Array} out the array to write the decrypted words\n     * into\n     * @param {number} offset the offset into the output array to start\n     * writing results\n     * @return {Array} The plaintext.\n     */\n\n\n    var _proto = AES.prototype;\n\n    _proto.decrypt = function decrypt(encrypted0, encrypted1, encrypted2, encrypted3, out, offset) {\n      var key = this._key[1]; // state variables a,b,c,d are loaded with pre-whitened data\n\n      var a = encrypted0 ^ key[0];\n      var b = encrypted3 ^ key[1];\n      var c = encrypted2 ^ key[2];\n      var d = encrypted1 ^ key[3];\n      var a2;\n      var b2;\n      var c2; // key.length === 2 ?\n\n      var nInnerRounds = key.length / 4 - 2;\n      var i;\n      var kIndex = 4;\n      var table = this._tables[1]; // load up the tables\n\n      var table0 = table[0];\n      var table1 = table[1];\n      var table2 = table[2];\n      var table3 = table[3];\n      var sbox = table[4]; // Inner rounds. Cribbed from OpenSSL.\n\n      for (i = 0; i < nInnerRounds; i++) {\n        a2 = table0[a >>> 24] ^ table1[b >> 16 & 255] ^ table2[c >> 8 & 255] ^ table3[d & 255] ^ key[kIndex];\n        b2 = table0[b >>> 24] ^ table1[c >> 16 & 255] ^ table2[d >> 8 & 255] ^ table3[a & 255] ^ key[kIndex + 1];\n        c2 = table0[c >>> 24] ^ table1[d >> 16 & 255] ^ table2[a >> 8 & 255] ^ table3[b & 255] ^ key[kIndex + 2];\n        d = table0[d >>> 24] ^ table1[a >> 16 & 255] ^ table2[b >> 8 & 255] ^ table3[c & 255] ^ key[kIndex + 3];\n        kIndex += 4;\n        a = a2;\n        b = b2;\n        c = c2;\n      } // Last round.\n\n\n      for (i = 0; i < 4; i++) {\n        out[(3 & -i) + offset] = sbox[a >>> 24] << 24 ^ sbox[b >> 16 & 255] << 16 ^ sbox[c >> 8 & 255] << 8 ^ sbox[d & 255] ^ key[kIndex++];\n        a2 = a;\n        a = b;\n        b = c;\n        c = d;\n        d = a2;\n      }\n    };\n\n    return AES;\n  }();\n  /**\n   * A wrapper around the Stream class to use setTimeout\n   * and run stream \"jobs\" Asynchronously\n   *\n   * @class AsyncStream\n   * @extends Stream\n   */\n\n\n  var AsyncStream = /*#__PURE__*/function (_Stream) {\n    inheritsLoose(AsyncStream, _Stream);\n\n    function AsyncStream() {\n      var _this;\n\n      _this = _Stream.call(this, Stream) || this;\n      _this.jobs = [];\n      _this.delay = 1;\n      _this.timeout_ = null;\n      return _this;\n    }\n    /**\n     * process an async job\n     *\n     * @private\n     */\n\n\n    var _proto = AsyncStream.prototype;\n\n    _proto.processJob_ = function processJob_() {\n      this.jobs.shift()();\n\n      if (this.jobs.length) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      } else {\n        this.timeout_ = null;\n      }\n    }\n    /**\n     * push a job into the stream\n     *\n     * @param {Function} job the job to push into the stream\n     */\n    ;\n\n    _proto.push = function push(job) {\n      this.jobs.push(job);\n\n      if (!this.timeout_) {\n        this.timeout_ = setTimeout(this.processJob_.bind(this), this.delay);\n      }\n    };\n\n    return AsyncStream;\n  }(Stream);\n  /**\n   * Convert network-order (big-endian) bytes into their little-endian\n   * representation.\n   */\n\n\n  var ntoh = function ntoh(word) {\n    return word << 24 | (word & 0xff00) << 8 | (word & 0xff0000) >> 8 | word >>> 24;\n  };\n  /**\n   * Decrypt bytes using AES-128 with CBC and PKCS#7 padding.\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * use for the first round of CBC.\n   * @return {Uint8Array} the decrypted bytes\n   *\n   * @see http://en.wikipedia.org/wiki/Advanced_Encryption_Standard\n   * @see http://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_Block_Chaining_.28CBC.29\n   * @see https://tools.ietf.org/html/rfc2315\n   */\n\n\n  var decrypt = function decrypt(encrypted, key, initVector) {\n    // word-level access to the encrypted bytes\n    var encrypted32 = new Int32Array(encrypted.buffer, encrypted.byteOffset, encrypted.byteLength >> 2);\n    var decipher = new AES(Array.prototype.slice.call(key)); // byte and word-level access for the decrypted output\n\n    var decrypted = new Uint8Array(encrypted.byteLength);\n    var decrypted32 = new Int32Array(decrypted.buffer); // temporary variables for working with the IV, encrypted, and\n    // decrypted data\n\n    var init0;\n    var init1;\n    var init2;\n    var init3;\n    var encrypted0;\n    var encrypted1;\n    var encrypted2;\n    var encrypted3; // iteration variable\n\n    var wordIx; // pull out the words of the IV to ensure we don't modify the\n    // passed-in reference and easier access\n\n    init0 = initVector[0];\n    init1 = initVector[1];\n    init2 = initVector[2];\n    init3 = initVector[3]; // decrypt four word sequences, applying cipher-block chaining (CBC)\n    // to each decrypted block\n\n    for (wordIx = 0; wordIx < encrypted32.length; wordIx += 4) {\n      // convert big-endian (network order) words into little-endian\n      // (javascript order)\n      encrypted0 = ntoh(encrypted32[wordIx]);\n      encrypted1 = ntoh(encrypted32[wordIx + 1]);\n      encrypted2 = ntoh(encrypted32[wordIx + 2]);\n      encrypted3 = ntoh(encrypted32[wordIx + 3]); // decrypt the block\n\n      decipher.decrypt(encrypted0, encrypted1, encrypted2, encrypted3, decrypted32, wordIx); // XOR with the IV, and restore network byte-order to obtain the\n      // plaintext\n\n      decrypted32[wordIx] = ntoh(decrypted32[wordIx] ^ init0);\n      decrypted32[wordIx + 1] = ntoh(decrypted32[wordIx + 1] ^ init1);\n      decrypted32[wordIx + 2] = ntoh(decrypted32[wordIx + 2] ^ init2);\n      decrypted32[wordIx + 3] = ntoh(decrypted32[wordIx + 3] ^ init3); // setup the IV for the next round\n\n      init0 = encrypted0;\n      init1 = encrypted1;\n      init2 = encrypted2;\n      init3 = encrypted3;\n    }\n\n    return decrypted;\n  };\n  /**\n   * The `Decrypter` class that manages decryption of AES\n   * data through `AsyncStream` objects and the `decrypt`\n   * function\n   *\n   * @param {Uint8Array} encrypted the encrypted bytes\n   * @param {Uint32Array} key the bytes of the decryption key\n   * @param {Uint32Array} initVector the initialization vector (IV) to\n   * @param {Function} done the function to run when done\n   * @class Decrypter\n   */\n\n\n  var Decrypter = /*#__PURE__*/function () {\n    function Decrypter(encrypted, key, initVector, done) {\n      var step = Decrypter.STEP;\n      var encrypted32 = new Int32Array(encrypted.buffer);\n      var decrypted = new Uint8Array(encrypted.byteLength);\n      var i = 0;\n      this.asyncStream_ = new AsyncStream(); // split up the encryption job and do the individual chunks asynchronously\n\n      this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n\n      for (i = step; i < encrypted32.length; i += step) {\n        initVector = new Uint32Array([ntoh(encrypted32[i - 4]), ntoh(encrypted32[i - 3]), ntoh(encrypted32[i - 2]), ntoh(encrypted32[i - 1])]);\n        this.asyncStream_.push(this.decryptChunk_(encrypted32.subarray(i, i + step), key, initVector, decrypted));\n      } // invoke the done() callback when everything is finished\n\n\n      this.asyncStream_.push(function () {\n        // remove pkcs#7 padding from the decrypted bytes\n        done(null, unpad(decrypted));\n      });\n    }\n    /**\n     * a getter for step the maximum number of bytes to process at one time\n     *\n     * @return {number} the value of step 32000\n     */\n\n\n    var _proto = Decrypter.prototype;\n    /**\n     * @private\n     */\n\n    _proto.decryptChunk_ = function decryptChunk_(encrypted, key, initVector, decrypted) {\n      return function () {\n        var bytes = decrypt(encrypted, key, initVector);\n        decrypted.set(bytes, encrypted.byteOffset);\n      };\n    };\n\n    createClass(Decrypter, null, [{\n      key: \"STEP\",\n      get: function get() {\n        // 4 * 8000;\n        return 32000;\n      }\n    }]);\n    return Decrypter;\n  }();\n\n  var win;\n\n  if (typeof window !== \"undefined\") {\n    win = window;\n  } else if (typeof commonjsGlobal !== \"undefined\") {\n    win = commonjsGlobal;\n  } else if (typeof self !== \"undefined\") {\n    win = self;\n  } else {\n    win = {};\n  }\n\n  var window_1 = win;\n\n  var isArrayBufferView = function isArrayBufferView(obj) {\n    if (ArrayBuffer.isView === 'function') {\n      return ArrayBuffer.isView(obj);\n    }\n\n    return obj && obj.buffer instanceof ArrayBuffer;\n  };\n\n  var BigInt = window_1.BigInt || Number;\n  [BigInt('0x1'), BigInt('0x100'), BigInt('0x10000'), BigInt('0x1000000'), BigInt('0x100000000'), BigInt('0x10000000000'), BigInt('0x1000000000000'), BigInt('0x100000000000000'), BigInt('0x10000000000000000')];\n  /**\n   * Creates an object for sending to a web worker modifying properties that are TypedArrays\n   * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n   *\n   * @param {Object} message\n   *        Object of properties and values to send to the web worker\n   * @return {Object}\n   *         Modified message with TypedArray values expanded\n   * @function createTransferableMessage\n   */\n\n\n  var createTransferableMessage = function createTransferableMessage(message) {\n    var transferable = {};\n    Object.keys(message).forEach(function (key) {\n      var value = message[key];\n\n      if (isArrayBufferView(value)) {\n        transferable[key] = {\n          bytes: value.buffer,\n          byteOffset: value.byteOffset,\n          byteLength: value.byteLength\n        };\n      } else {\n        transferable[key] = value;\n      }\n    });\n    return transferable;\n  };\n  /* global self */\n\n  /**\n   * Our web worker interface so that things can talk to aes-decrypter\n   * that will be running in a web worker. the scope is passed to this by\n   * webworkify.\n   */\n\n\n  self.onmessage = function (event) {\n    var data = event.data;\n    var encrypted = new Uint8Array(data.encrypted.bytes, data.encrypted.byteOffset, data.encrypted.byteLength);\n    var key = new Uint32Array(data.key.bytes, data.key.byteOffset, data.key.byteLength / 4);\n    var iv = new Uint32Array(data.iv.bytes, data.iv.byteOffset, data.iv.byteLength / 4);\n    /* eslint-disable no-new, handle-callback-err */\n\n    new Decrypter(encrypted, key, iv, function (err, bytes) {\n      self.postMessage(createTransferableMessage({\n        source: data.source,\n        decrypted: bytes\n      }), [bytes.buffer]);\n    });\n    /* eslint-enable */\n  };\n}));\nvar Decrypter = factory(workerCode);\n/* rollup-plugin-worker-factory end for worker!/Users/ddashkevich/projects/http-streaming/src/decrypter-worker.js */\n\n/**\n * Convert the properties of an HLS track into an audioTrackKind.\n *\n * @private\n */\n\nvar audioTrackKind_ = function audioTrackKind_(properties) {\n  var kind = properties[\"default\"] ? 'main' : 'alternative';\n\n  if (properties.characteristics && properties.characteristics.indexOf('public.accessibility.describes-video') >= 0) {\n    kind = 'main-desc';\n  }\n\n  return kind;\n};\n/**\n * Pause provided segment loader and playlist loader if active\n *\n * @param {SegmentLoader} segmentLoader\n *        SegmentLoader to pause\n * @param {Object} mediaType\n *        Active media type\n * @function stopLoaders\n */\n\n\nvar stopLoaders = function stopLoaders(segmentLoader, mediaType) {\n  segmentLoader.abort();\n  segmentLoader.pause();\n\n  if (mediaType && mediaType.activePlaylistLoader) {\n    mediaType.activePlaylistLoader.pause();\n    mediaType.activePlaylistLoader = null;\n  }\n};\n/**\n * Start loading provided segment loader and playlist loader\n *\n * @param {PlaylistLoader} playlistLoader\n *        PlaylistLoader to start loading\n * @param {Object} mediaType\n *        Active media type\n * @function startLoaders\n */\n\n\nvar startLoaders = function startLoaders(playlistLoader, mediaType) {\n  // Segment loader will be started after `loadedmetadata` or `loadedplaylist` from the\n  // playlist loader\n  mediaType.activePlaylistLoader = playlistLoader;\n  playlistLoader.load();\n};\n/**\n * Returns a function to be called when the media group changes. It performs a\n * non-destructive (preserve the buffer) resync of the SegmentLoader. This is because a\n * change of group is merely a rendition switch of the same content at another encoding,\n * rather than a change of content, such as switching audio from English to Spanish.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a non-destructive resync of SegmentLoader when the active media\n *         group changes.\n * @function onGroupChanged\n */\n\n\nvar onGroupChanged = function onGroupChanged(type, settings) {\n  return function () {\n    var _settings$segmentLoad = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad[type],\n        mainSegmentLoader = _settings$segmentLoad.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastGroup = mediaType.lastGroup_; // the group did not change do nothing\n\n    if (activeGroup && lastGroup && activeGroup.id === lastGroup.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup || activeGroup.isMasterPlaylist) {\n      // there is no group active or active group is a main playlist and won't change\n      return;\n    }\n\n    if (!activeGroup.playlistLoader) {\n      if (previousActiveLoader) {\n        // The previous group had a playlist loader but the new active group does not\n        // this means we are switching from demuxed to muxed audio. In this case we want to\n        // do a destructive reset of the main segment loader and not restart the audio\n        // loaders.\n        mainSegmentLoader.resetEverything();\n      }\n\n      return;\n    } // Non-destructive resync\n\n\n    segmentLoader.resyncLoader();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onGroupChanging = function onGroupChanging(type, settings) {\n  return function () {\n    var segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    mediaType.lastGroup_ = null;\n    segmentLoader.abort();\n    segmentLoader.pause();\n  };\n};\n/**\n * Returns a function to be called when the media track changes. It performs a\n * destructive reset of the SegmentLoader to ensure we start loading as close to\n * currentTime as possible.\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Handler for a destructive reset of SegmentLoader when the active media\n *         track changes.\n * @function onTrackChanged\n */\n\n\nvar onTrackChanged = function onTrackChanged(type, settings) {\n  return function () {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        _settings$segmentLoad2 = settings.segmentLoaders,\n        segmentLoader = _settings$segmentLoad2[type],\n        mainSegmentLoader = _settings$segmentLoad2.main,\n        mediaType = settings.mediaTypes[type];\n    var activeTrack = mediaType.activeTrack();\n    var activeGroup = mediaType.getActiveGroup();\n    var previousActiveLoader = mediaType.activePlaylistLoader;\n    var lastTrack = mediaType.lastTrack_; // track did not change, do nothing\n\n    if (lastTrack && activeTrack && lastTrack.id === activeTrack.id) {\n      return;\n    }\n\n    mediaType.lastGroup_ = activeGroup;\n    mediaType.lastTrack_ = activeTrack;\n    stopLoaders(segmentLoader, mediaType);\n\n    if (!activeGroup) {\n      // there is no group active so we do not want to restart loaders\n      return;\n    }\n\n    if (activeGroup.isMasterPlaylist) {\n      // track did not change, do nothing\n      if (!activeTrack || !lastTrack || activeTrack.id === lastTrack.id) {\n        return;\n      }\n\n      var mpc = settings.vhs.masterPlaylistController_;\n      var newPlaylist = mpc.selectPlaylist(); // media will not change do nothing\n\n      if (mpc.media() === newPlaylist) {\n        return;\n      }\n\n      mediaType.logger_(\"track change. Switching master audio from \" + lastTrack.id + \" to \" + activeTrack.id);\n      masterPlaylistLoader.pause();\n      mainSegmentLoader.resetEverything();\n      mpc.fastQualityChange_(newPlaylist);\n      return;\n    }\n\n    if (type === 'AUDIO') {\n      if (!activeGroup.playlistLoader) {\n        // when switching from demuxed audio/video to muxed audio/video (noted by no\n        // playlist loader for the audio group), we want to do a destructive reset of the\n        // main segment loader and not restart the audio loaders\n        mainSegmentLoader.setAudio(true); // don't have to worry about disabling the audio of the audio segment loader since\n        // it should be stopped\n\n        mainSegmentLoader.resetEverything();\n        return;\n      } // although the segment loader is an audio segment loader, call the setAudio\n      // function to ensure it is prepared to re-append the init segment (or handle other\n      // config changes)\n\n\n      segmentLoader.setAudio(true);\n      mainSegmentLoader.setAudio(false);\n    }\n\n    if (previousActiveLoader === activeGroup.playlistLoader) {\n      // Nothing has actually changed. This can happen because track change events can fire\n      // multiple times for a \"single\" change. One for enabling the new active track, and\n      // one for disabling the track that was active\n      startLoaders(activeGroup.playlistLoader, mediaType);\n      return;\n    }\n\n    if (segmentLoader.track) {\n      // For WebVTT, set the new text track in the segmentloader\n      segmentLoader.track(activeTrack);\n    } // destructive reset\n\n\n    segmentLoader.resetEverything();\n    startLoaders(activeGroup.playlistLoader, mediaType);\n  };\n};\n\nvar onError = {\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning (or error if the playlist is blacklisted) to\n   *         console and switches back to default audio track.\n   * @function onError.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type],\n          blacklistCurrentPlaylist = settings.blacklistCurrentPlaylist;\n      stopLoaders(segmentLoader, mediaType); // switch back to default audio track\n\n      var activeTrack = mediaType.activeTrack();\n      var activeGroup = mediaType.activeGroup();\n      var id = (activeGroup.filter(function (group) {\n        return group[\"default\"];\n      })[0] || activeGroup[0]).id;\n      var defaultTrack = mediaType.tracks[id];\n\n      if (activeTrack === defaultTrack) {\n        // Default track encountered an error. All we can do now is blacklist the current\n        // rendition and hope another will switch audio groups\n        blacklistCurrentPlaylist({\n          message: 'Problem encountered loading the default audio track.'\n        });\n        return;\n      }\n\n      videojs.log.warn('Problem encountered loading the alternate audio track.' + 'Switching back to default.');\n\n      for (var trackId in mediaType.tracks) {\n        mediaType.tracks[trackId].enabled = mediaType.tracks[trackId] === defaultTrack;\n      }\n\n      mediaType.onTrackChanged();\n    };\n  },\n\n  /**\n   * Returns a function to be called when a SegmentLoader or PlaylistLoader encounters\n   * an error.\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Error handler. Logs warning to console and disables the active subtitle track\n   * @function onError.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var segmentLoader = settings.segmentLoaders[type],\n          mediaType = settings.mediaTypes[type];\n      videojs.log.warn('Problem encountered loading the subtitle track.' + 'Disabling subtitle track.');\n      stopLoaders(segmentLoader, mediaType);\n      var track = mediaType.activeTrack();\n\n      if (track) {\n        track.mode = 'disabled';\n      }\n\n      mediaType.onTrackChanged();\n    };\n  }\n};\nvar setupListeners = {\n  /**\n   * Setup event listeners for audio playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.AUDIO\n   */\n  AUDIO: function AUDIO(type, playlistLoader, settings) {\n    if (!playlistLoader) {\n      // no playlist loader means audio will be muxed with the video\n      return;\n    }\n\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup event listeners for subtitle playlist loader\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {PlaylistLoader|null} playlistLoader\n   *        PlaylistLoader to register listeners on\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function setupListeners.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, playlistLoader, settings) {\n    var tech = settings.tech,\n        requestOptions = settings.requestOptions,\n        segmentLoader = settings.segmentLoaders[type],\n        mediaType = settings.mediaTypes[type];\n    playlistLoader.on('loadedmetadata', function () {\n      var media = playlistLoader.media();\n      segmentLoader.playlist(media, requestOptions);\n      segmentLoader.track(mediaType.activeTrack()); // if the video is already playing, or if this isn't a live video and preload\n      // permits, start downloading segments\n\n      if (!tech.paused() || media.endList && tech.preload() !== 'none') {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('loadedplaylist', function () {\n      segmentLoader.playlist(playlistLoader.media(), requestOptions); // If the player isn't paused, ensure that the segment loader is running\n\n      if (!tech.paused()) {\n        segmentLoader.load();\n      }\n    });\n    playlistLoader.on('error', onError[type](type, settings));\n  }\n};\nvar initialize = {\n  /**\n   * Setup PlaylistLoaders and AudioTracks for the audio groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.AUDIO\n   */\n  'AUDIO': function AUDIO(type, settings) {\n    var vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$ = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$.groups,\n        tracks = _settings$mediaTypes$.tracks,\n        logger_ = _settings$mediaTypes$.logger_,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n    var audioOnlyMaster = isAudioOnly(masterPlaylistLoader.master); // force a default if we have none\n\n    if (!mediaGroups[type] || Object.keys(mediaGroups[type]).length === 0) {\n      mediaGroups[type] = {\n        main: {\n          \"default\": {\n            \"default\": true\n          }\n        }\n      };\n\n      if (audioOnlyMaster) {\n        mediaGroups[type].main[\"default\"].playlists = masterPlaylistLoader.master.playlists;\n      }\n    }\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (audioOnlyMaster) {\n          logger_(\"AUDIO group '\" + groupId + \"' label '\" + variantLabel + \"' is a master playlist\");\n          properties.isMasterPlaylist = true;\n          playlistLoader = null; // if vhs-json was provided as the source, and the media playlist was resolved,\n          // use the resolved media playlist object\n        } else if (sourceType === 'vhs-json' && properties.playlists) {\n          playlistLoader = new PlaylistLoader(properties.playlists[0], vhs, requestOptions);\n        } else if (properties.resolvedUri) {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions); // TODO: dash isn't the only type with properties.playlists\n          // should we even have properties.playlists in this check.\n        } else if (properties.playlists && sourceType === 'dash') {\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else {\n          // no resolvedUri means the audio is muxed with the video when using this\n          // audio track\n          playlistLoader = null;\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = new videojs.AudioTrack({\n            id: variantLabel,\n            kind: audioTrackKind_(properties),\n            enabled: false,\n            language: properties.language,\n            \"default\": properties[\"default\"],\n            label: variantLabel\n          });\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup PlaylistLoaders and TextTracks for the subtitle groups\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize.SUBTITLES\n   */\n  'SUBTITLES': function SUBTITLES(type, settings) {\n    var tech = settings.tech,\n        vhs = settings.vhs,\n        sourceType = settings.sourceType,\n        segmentLoader = settings.segmentLoaders[type],\n        requestOptions = settings.requestOptions,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$2 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$2.groups,\n        tracks = _settings$mediaTypes$2.tracks,\n        masterPlaylistLoader = settings.masterPlaylistLoader;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        if (mediaGroups[type][groupId][variantLabel].forced) {\n          // Subtitle playlists with the forced attribute are not selectable in Safari.\n          // According to Apple's HLS Authoring Specification:\n          //   If content has forced subtitles and regular subtitles in a given language,\n          //   the regular subtitles track in that language MUST contain both the forced\n          //   subtitles and the regular subtitles for that language.\n          // Because of this requirement and that Safari does not add forced subtitles,\n          // forced subtitles are skipped here to maintain consistent experience across\n          // all platforms\n          continue;\n        }\n\n        var properties = mediaGroups[type][groupId][variantLabel];\n        var playlistLoader = void 0;\n\n        if (sourceType === 'hls') {\n          playlistLoader = new PlaylistLoader(properties.resolvedUri, vhs, requestOptions);\n        } else if (sourceType === 'dash') {\n          var playlists = properties.playlists.filter(function (p) {\n            return p.excludeUntil !== Infinity;\n          });\n\n          if (!playlists.length) {\n            return;\n          }\n\n          playlistLoader = new DashPlaylistLoader(properties.playlists[0], vhs, requestOptions, masterPlaylistLoader);\n        } else if (sourceType === 'vhs-json') {\n          playlistLoader = new PlaylistLoader( // if the vhs-json object included the media playlist, use the media playlist\n          // as provided, otherwise use the resolved URI to load the playlist\n          properties.playlists ? properties.playlists[0] : properties.resolvedUri, vhs, requestOptions);\n        }\n\n        properties = videojs.mergeOptions({\n          id: variantLabel,\n          playlistLoader: playlistLoader\n        }, properties);\n        setupListeners[type](type, properties.playlistLoader, settings);\n        groups[groupId].push(properties);\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: variantLabel,\n            kind: 'subtitles',\n            \"default\": properties[\"default\"] && properties.autoselect,\n            language: properties.language,\n            label: variantLabel\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    } // setup single error event handler for the segment loader\n\n\n    segmentLoader.on('error', onError[type](type, settings));\n  },\n\n  /**\n   * Setup TextTracks for the closed-caption groups\n   *\n   * @param {String} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @function initialize['CLOSED-CAPTIONS']\n   */\n  'CLOSED-CAPTIONS': function CLOSEDCAPTIONS(type, settings) {\n    var tech = settings.tech,\n        mediaGroups = settings.master.mediaGroups,\n        _settings$mediaTypes$3 = settings.mediaTypes[type],\n        groups = _settings$mediaTypes$3.groups,\n        tracks = _settings$mediaTypes$3.tracks;\n\n    for (var groupId in mediaGroups[type]) {\n      if (!groups[groupId]) {\n        groups[groupId] = [];\n      }\n\n      for (var variantLabel in mediaGroups[type][groupId]) {\n        var properties = mediaGroups[type][groupId][variantLabel]; // Look for either 608 (CCn) or 708 (SERVICEn) caption services\n\n        if (!/^(?:CC|SERVICE)/.test(properties.instreamId)) {\n          continue;\n        }\n\n        var captionServices = tech.options_.vhs && tech.options_.vhs.captionServices || {};\n        var newProps = {\n          label: variantLabel,\n          language: properties.language,\n          instreamId: properties.instreamId,\n          \"default\": properties[\"default\"] && properties.autoselect\n        };\n\n        if (captionServices[newProps.instreamId]) {\n          newProps = videojs.mergeOptions(newProps, captionServices[newProps.instreamId]);\n        }\n\n        if (newProps[\"default\"] === undefined) {\n          delete newProps[\"default\"];\n        } // No PlaylistLoader is required for Closed-Captions because the captions are\n        // embedded within the video stream\n\n\n        groups[groupId].push(videojs.mergeOptions({\n          id: variantLabel\n        }, properties));\n\n        if (typeof tracks[variantLabel] === 'undefined') {\n          var track = tech.addRemoteTextTrack({\n            id: newProps.instreamId,\n            kind: 'captions',\n            \"default\": newProps[\"default\"],\n            language: newProps.language,\n            label: newProps.label\n          }, false).track;\n          tracks[variantLabel] = track;\n        }\n      }\n    }\n  }\n};\n\nvar groupMatch = function groupMatch(list, media) {\n  for (var i = 0; i < list.length; i++) {\n    if (playlistMatch(media, list[i])) {\n      return true;\n    }\n\n    if (list[i].playlists && groupMatch(list[i].playlists, media)) {\n      return true;\n    }\n  }\n\n  return false;\n};\n/**\n * Returns a function used to get the active group of the provided type\n *\n * @param {string} type\n *        MediaGroup type\n * @param {Object} settings\n *        Object containing required information for media groups\n * @return {Function}\n *         Function that returns the active media group for the provided type. Takes an\n *         optional parameter {TextTrack} track. If no track is provided, a list of all\n *         variants in the group, otherwise the variant corresponding to the provided\n *         track is returned.\n * @function activeGroup\n */\n\n\nvar activeGroup = function activeGroup(type, settings) {\n  return function (track) {\n    var masterPlaylistLoader = settings.masterPlaylistLoader,\n        groups = settings.mediaTypes[type].groups;\n    var media = masterPlaylistLoader.media();\n\n    if (!media) {\n      return null;\n    }\n\n    var variants = null; // set to variants to main media active group\n\n    if (media.attributes[type]) {\n      variants = groups[media.attributes[type]];\n    }\n\n    var groupKeys = Object.keys(groups);\n\n    if (!variants) {\n      // find the masterPlaylistLoader media\n      // that is in a media group if we are dealing\n      // with audio only\n      if (type === 'AUDIO' && groupKeys.length > 1 && isAudioOnly(settings.master)) {\n        for (var i = 0; i < groupKeys.length; i++) {\n          var groupPropertyList = groups[groupKeys[i]];\n\n          if (groupMatch(groupPropertyList, media)) {\n            variants = groupPropertyList;\n            break;\n          }\n        } // use the main group if it exists\n\n      } else if (groups.main) {\n        variants = groups.main; // only one group, use that one\n      } else if (groupKeys.length === 1) {\n        variants = groups[groupKeys[0]];\n      }\n    }\n\n    if (typeof track === 'undefined') {\n      return variants;\n    }\n\n    if (track === null || !variants) {\n      // An active track was specified so a corresponding group is expected. track === null\n      // means no track is currently active so there is no corresponding group\n      return null;\n    }\n\n    return variants.filter(function (props) {\n      return props.id === track.id;\n    })[0] || null;\n  };\n};\n\nvar activeTrack = {\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.AUDIO\n   */\n  AUDIO: function AUDIO(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].enabled) {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  },\n\n  /**\n   * Returns a function used to get the active track of type provided\n   *\n   * @param {string} type\n   *        MediaGroup type\n   * @param {Object} settings\n   *        Object containing required information for media groups\n   * @return {Function}\n   *         Function that returns the active media track for the provided type. Returns\n   *         null if no track is active\n   * @function activeTrack.SUBTITLES\n   */\n  SUBTITLES: function SUBTITLES(type, settings) {\n    return function () {\n      var tracks = settings.mediaTypes[type].tracks;\n\n      for (var id in tracks) {\n        if (tracks[id].mode === 'showing' || tracks[id].mode === 'hidden') {\n          return tracks[id];\n        }\n      }\n\n      return null;\n    };\n  }\n};\n\nvar getActiveGroup = function getActiveGroup(type, _ref) {\n  var mediaTypes = _ref.mediaTypes;\n  return function () {\n    var activeTrack_ = mediaTypes[type].activeTrack();\n\n    if (!activeTrack_) {\n      return null;\n    }\n\n    return mediaTypes[type].activeGroup(activeTrack_);\n  };\n};\n/**\n * Setup PlaylistLoaders and Tracks for media groups (Audio, Subtitles,\n * Closed-Captions) specified in the master manifest.\n *\n * @param {Object} settings\n *        Object containing required information for setting up the media groups\n * @param {Tech} settings.tech\n *        The tech of the player\n * @param {Object} settings.requestOptions\n *        XHR request options used by the segment loaders\n * @param {PlaylistLoader} settings.masterPlaylistLoader\n *        PlaylistLoader for the master source\n * @param {VhsHandler} settings.vhs\n *        VHS SourceHandler\n * @param {Object} settings.master\n *        The parsed master manifest\n * @param {Object} settings.mediaTypes\n *        Object to store the loaders, tracks, and utility methods for each media type\n * @param {Function} settings.blacklistCurrentPlaylist\n *        Blacklists the current rendition and forces a rendition switch.\n * @function setupMediaGroups\n */\n\n\nvar setupMediaGroups = function setupMediaGroups(settings) {\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    initialize[type](type, settings);\n  });\n  var mediaTypes = settings.mediaTypes,\n      masterPlaylistLoader = settings.masterPlaylistLoader,\n      tech = settings.tech,\n      vhs = settings.vhs,\n      _settings$segmentLoad3 = settings.segmentLoaders,\n      audioSegmentLoader = _settings$segmentLoad3['AUDIO'],\n      mainSegmentLoader = _settings$segmentLoad3.main; // setup active group and track getters and change event handlers\n\n  ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n    mediaTypes[type].activeGroup = activeGroup(type, settings);\n    mediaTypes[type].activeTrack = activeTrack[type](type, settings);\n    mediaTypes[type].onGroupChanged = onGroupChanged(type, settings);\n    mediaTypes[type].onGroupChanging = onGroupChanging(type, settings);\n    mediaTypes[type].onTrackChanged = onTrackChanged(type, settings);\n    mediaTypes[type].getActiveGroup = getActiveGroup(type, settings);\n  }); // DO NOT enable the default subtitle or caption track.\n  // DO enable the default audio track\n\n  var audioGroup = mediaTypes.AUDIO.activeGroup();\n\n  if (audioGroup) {\n    var groupId = (audioGroup.filter(function (group) {\n      return group[\"default\"];\n    })[0] || audioGroup[0]).id;\n    mediaTypes.AUDIO.tracks[groupId].enabled = true;\n    mediaTypes.AUDIO.onGroupChanged();\n    mediaTypes.AUDIO.onTrackChanged();\n    var activeAudioGroup = mediaTypes.AUDIO.getActiveGroup(); // a similar check for handling setAudio on each loader is run again each time the\n    // track is changed, but needs to be handled here since the track may not be considered\n    // changed on the first call to onTrackChanged\n\n    if (!activeAudioGroup.playlistLoader) {\n      // either audio is muxed with video or the stream is audio only\n      mainSegmentLoader.setAudio(true);\n    } else {\n      // audio is demuxed\n      mainSegmentLoader.setAudio(false);\n      audioSegmentLoader.setAudio(true);\n    }\n  }\n\n  masterPlaylistLoader.on('mediachange', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanged();\n    });\n  });\n  masterPlaylistLoader.on('mediachanging', function () {\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      return mediaTypes[type].onGroupChanging();\n    });\n  }); // custom audio track change event handler for usage event\n\n  var onAudioTrackChanged = function onAudioTrackChanged() {\n    mediaTypes.AUDIO.onTrackChanged();\n    tech.trigger({\n      type: 'usage',\n      name: 'vhs-audio-change'\n    });\n    tech.trigger({\n      type: 'usage',\n      name: 'hls-audio-change'\n    });\n  };\n\n  tech.audioTracks().addEventListener('change', onAudioTrackChanged);\n  tech.remoteTextTracks().addEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  vhs.on('dispose', function () {\n    tech.audioTracks().removeEventListener('change', onAudioTrackChanged);\n    tech.remoteTextTracks().removeEventListener('change', mediaTypes.SUBTITLES.onTrackChanged);\n  }); // clear existing audio tracks and add the ones we just created\n\n  tech.clearTracks('audio');\n\n  for (var id in mediaTypes.AUDIO.tracks) {\n    tech.audioTracks().addTrack(mediaTypes.AUDIO.tracks[id]);\n  }\n};\n/**\n * Creates skeleton object used to store the loaders, tracks, and utility methods for each\n * media type\n *\n * @return {Object}\n *         Object to store the loaders, tracks, and utility methods for each media type\n * @function createMediaTypes\n */\n\n\nvar createMediaTypes = function createMediaTypes() {\n  var mediaTypes = {};\n  ['AUDIO', 'SUBTITLES', 'CLOSED-CAPTIONS'].forEach(function (type) {\n    mediaTypes[type] = {\n      groups: {},\n      tracks: {},\n      activePlaylistLoader: null,\n      activeGroup: noop,\n      activeTrack: noop,\n      getActiveGroup: noop,\n      onGroupChanged: noop,\n      onTrackChanged: noop,\n      lastTrack_: null,\n      logger_: logger(\"MediaGroups[\" + type + \"]\")\n    };\n  });\n  return mediaTypes;\n};\n\nvar ABORT_EARLY_BLACKLIST_SECONDS = 60 * 2;\nvar Vhs$1; // SegmentLoader stats that need to have each loader's\n// values summed to calculate the final value\n\nvar loaderStats = ['mediaRequests', 'mediaRequestsAborted', 'mediaRequestsTimedout', 'mediaRequestsErrored', 'mediaTransferDuration', 'mediaBytesTransferred', 'mediaAppends'];\n\nvar sumLoaderStat = function sumLoaderStat(stat) {\n  return this.audioSegmentLoader_[stat] + this.mainSegmentLoader_[stat];\n};\n\nvar shouldSwitchToMedia = function shouldSwitchToMedia(_ref) {\n  var currentPlaylist = _ref.currentPlaylist,\n      buffered = _ref.buffered,\n      currentTime = _ref.currentTime,\n      nextPlaylist = _ref.nextPlaylist,\n      bufferLowWaterLine = _ref.bufferLowWaterLine,\n      bufferHighWaterLine = _ref.bufferHighWaterLine,\n      duration = _ref.duration,\n      experimentalBufferBasedABR = _ref.experimentalBufferBasedABR,\n      log = _ref.log; // we have no other playlist to switch to\n\n  if (!nextPlaylist) {\n    videojs.log.warn('We received no playlist to switch to. Please check your stream.');\n    return false;\n  }\n\n  var sharedLogLine = \"allowing switch \" + (currentPlaylist && currentPlaylist.id || 'null') + \" -> \" + nextPlaylist.id;\n\n  if (!currentPlaylist) {\n    log(sharedLogLine + \" as current playlist is not set\");\n    return true;\n  } // no need to switch if playlist is the same\n\n\n  if (nextPlaylist.id === currentPlaylist.id) {\n    return false;\n  } // determine if current time is in a buffered range.\n\n\n  var isBuffered = Boolean(findRange(buffered, currentTime).length); // If the playlist is live, then we want to not take low water line into account.\n  // This is because in LIVE, the player plays 3 segments from the end of the\n  // playlist, and if `BUFFER_LOW_WATER_LINE` is greater than the duration availble\n  // in those segments, a viewer will never experience a rendition upswitch.\n\n  if (!currentPlaylist.endList) {\n    // For LLHLS live streams, don't switch renditions before playback has started, as it almost\n    // doubles the time to first playback.\n    if (!isBuffered && typeof currentPlaylist.partTargetDuration === 'number') {\n      log(\"not \" + sharedLogLine + \" as current playlist is live llhls, but currentTime isn't in buffered.\");\n      return false;\n    }\n\n    log(sharedLogLine + \" as current playlist is live\");\n    return true;\n  }\n\n  var forwardBuffer = timeAheadOf(buffered, currentTime);\n  var maxBufferLowWaterLine = experimentalBufferBasedABR ? Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE : Config.MAX_BUFFER_LOW_WATER_LINE; // For the same reason as LIVE, we ignore the low water line when the VOD\n  // duration is below the max potential low water line\n\n  if (duration < maxBufferLowWaterLine) {\n    log(sharedLogLine + \" as duration < max low water line (\" + duration + \" < \" + maxBufferLowWaterLine + \")\");\n    return true;\n  }\n\n  var nextBandwidth = nextPlaylist.attributes.BANDWIDTH;\n  var currBandwidth = currentPlaylist.attributes.BANDWIDTH; // when switching down, if our buffer is lower than the high water line,\n  // we can switch down\n\n  if (nextBandwidth < currBandwidth && (!experimentalBufferBasedABR || forwardBuffer < bufferHighWaterLine)) {\n    var logLine = sharedLogLine + \" as next bandwidth < current bandwidth (\" + nextBandwidth + \" < \" + currBandwidth + \")\";\n\n    if (experimentalBufferBasedABR) {\n      logLine += \" and forwardBuffer < bufferHighWaterLine (\" + forwardBuffer + \" < \" + bufferHighWaterLine + \")\";\n    }\n\n    log(logLine);\n    return true;\n  } // and if our buffer is higher than the low water line,\n  // we can switch up\n\n\n  if ((!experimentalBufferBasedABR || nextBandwidth > currBandwidth) && forwardBuffer >= bufferLowWaterLine) {\n    var _logLine = sharedLogLine + \" as forwardBuffer >= bufferLowWaterLine (\" + forwardBuffer + \" >= \" + bufferLowWaterLine + \")\";\n\n    if (experimentalBufferBasedABR) {\n      _logLine += \" and next bandwidth > current bandwidth (\" + nextBandwidth + \" > \" + currBandwidth + \")\";\n    }\n\n    log(_logLine);\n    return true;\n  }\n\n  log(\"not \" + sharedLogLine + \" as no switching criteria met\");\n  return false;\n};\n/**\n * the master playlist controller controller all interactons\n * between playlists and segmentloaders. At this time this mainly\n * involves a master playlist and a series of audio playlists\n * if they are available\n *\n * @class MasterPlaylistController\n * @extends videojs.EventTarget\n */\n\n\nvar MasterPlaylistController = /*#__PURE__*/function (_videojs$EventTarget) {\n  _inheritsLoose(MasterPlaylistController, _videojs$EventTarget);\n\n  function MasterPlaylistController(options) {\n    var _this;\n\n    _this = _videojs$EventTarget.call(this) || this;\n    var src = options.src,\n        handleManifestRedirects = options.handleManifestRedirects,\n        withCredentials = options.withCredentials,\n        tech = options.tech,\n        bandwidth = options.bandwidth,\n        externVhs = options.externVhs,\n        useCueTags = options.useCueTags,\n        blacklistDuration = options.blacklistDuration,\n        enableLowInitialPlaylist = options.enableLowInitialPlaylist,\n        sourceType = options.sourceType,\n        cacheEncryptionKeys = options.cacheEncryptionKeys,\n        experimentalBufferBasedABR = options.experimentalBufferBasedABR,\n        experimentalLeastPixelDiffSelector = options.experimentalLeastPixelDiffSelector,\n        captionServices = options.captionServices;\n\n    if (!src) {\n      throw new Error('A non-empty playlist URL or JSON manifest string is required');\n    }\n\n    var maxPlaylistRetries = options.maxPlaylistRetries;\n\n    if (maxPlaylistRetries === null || typeof maxPlaylistRetries === 'undefined') {\n      maxPlaylistRetries = Infinity;\n    }\n\n    Vhs$1 = externVhs;\n    _this.experimentalBufferBasedABR = Boolean(experimentalBufferBasedABR);\n    _this.experimentalLeastPixelDiffSelector = Boolean(experimentalLeastPixelDiffSelector);\n    _this.withCredentials = withCredentials;\n    _this.tech_ = tech;\n    _this.vhs_ = tech.vhs;\n    _this.sourceType_ = sourceType;\n    _this.useCueTags_ = useCueTags;\n    _this.blacklistDuration = blacklistDuration;\n    _this.maxPlaylistRetries = maxPlaylistRetries;\n    _this.enableLowInitialPlaylist = enableLowInitialPlaylist;\n\n    if (_this.useCueTags_) {\n      _this.cueTagsTrack_ = _this.tech_.addTextTrack('metadata', 'ad-cues');\n      _this.cueTagsTrack_.inBandMetadataTrackDispatchType = '';\n    }\n\n    _this.requestOptions_ = {\n      withCredentials: withCredentials,\n      handleManifestRedirects: handleManifestRedirects,\n      maxPlaylistRetries: maxPlaylistRetries,\n      timeout: null\n    };\n\n    _this.on('error', _this.pauseLoading);\n\n    _this.mediaTypes_ = createMediaTypes();\n    _this.mediaSource = new window$1.MediaSource();\n    _this.handleDurationChange_ = _this.handleDurationChange_.bind(_assertThisInitialized(_this));\n    _this.handleSourceOpen_ = _this.handleSourceOpen_.bind(_assertThisInitialized(_this));\n    _this.handleSourceEnded_ = _this.handleSourceEnded_.bind(_assertThisInitialized(_this));\n\n    _this.mediaSource.addEventListener('durationchange', _this.handleDurationChange_); // load the media source into the player\n\n\n    _this.mediaSource.addEventListener('sourceopen', _this.handleSourceOpen_);\n\n    _this.mediaSource.addEventListener('sourceended', _this.handleSourceEnded_); // we don't have to handle sourceclose since dispose will handle termination of\n    // everything, and the MediaSource should not be detached without a proper disposal\n\n\n    _this.seekable_ = videojs.createTimeRanges();\n    _this.hasPlayed_ = false;\n    _this.syncController_ = new SyncController(options);\n    _this.segmentMetadataTrack_ = tech.addRemoteTextTrack({\n      kind: 'metadata',\n      label: 'segment-metadata'\n    }, false).track;\n    _this.decrypter_ = new Decrypter();\n    _this.sourceUpdater_ = new SourceUpdater(_this.mediaSource);\n    _this.inbandTextTracks_ = {};\n    _this.timelineChangeController_ = new TimelineChangeController();\n    var segmentLoaderSettings = {\n      vhs: _this.vhs_,\n      parse708captions: options.parse708captions,\n      useDtsForTimestampOffset: options.useDtsForTimestampOffset,\n      captionServices: captionServices,\n      mediaSource: _this.mediaSource,\n      currentTime: _this.tech_.currentTime.bind(_this.tech_),\n      seekable: function seekable() {\n        return _this.seekable();\n      },\n      seeking: function seeking() {\n        return _this.tech_.seeking();\n      },\n      duration: function duration() {\n        return _this.duration();\n      },\n      hasPlayed: function hasPlayed() {\n        return _this.hasPlayed_;\n      },\n      goalBufferLength: function goalBufferLength() {\n        return _this.goalBufferLength();\n      },\n      bandwidth: bandwidth,\n      syncController: _this.syncController_,\n      decrypter: _this.decrypter_,\n      sourceType: _this.sourceType_,\n      inbandTextTracks: _this.inbandTextTracks_,\n      cacheEncryptionKeys: cacheEncryptionKeys,\n      sourceUpdater: _this.sourceUpdater_,\n      timelineChangeController: _this.timelineChangeController_,\n      experimentalExactManifestTimings: options.experimentalExactManifestTimings\n    }; // The source type check not only determines whether a special DASH playlist loader\n    // should be used, but also covers the case where the provided src is a vhs-json\n    // manifest object (instead of a URL). In the case of vhs-json, the default\n    // PlaylistLoader should be used.\n\n    _this.masterPlaylistLoader_ = _this.sourceType_ === 'dash' ? new DashPlaylistLoader(src, _this.vhs_, _this.requestOptions_) : new PlaylistLoader(src, _this.vhs_, _this.requestOptions_);\n\n    _this.setupMasterPlaylistLoaderListeners_(); // setup segment loaders\n    // combined audio/video or just video when alternate audio track is selected\n\n\n    _this.mainSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      segmentMetadataTrack: _this.segmentMetadataTrack_,\n      loaderType: 'main'\n    }), options); // alternate audio track\n\n    _this.audioSegmentLoader_ = new SegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'audio'\n    }), options);\n    _this.subtitleSegmentLoader_ = new VTTSegmentLoader(videojs.mergeOptions(segmentLoaderSettings, {\n      loaderType: 'vtt',\n      featuresNativeTextTracks: _this.tech_.featuresNativeTextTracks,\n      loadVttJs: function loadVttJs() {\n        return new Promise(function (resolve, reject) {\n          function onLoad() {\n            tech.off('vttjserror', onError);\n            resolve();\n          }\n\n          function onError() {\n            tech.off('vttjsloaded', onLoad);\n            reject();\n          }\n\n          tech.one('vttjsloaded', onLoad);\n          tech.one('vttjserror', onError); // safe to call multiple times, script will be loaded only once:\n\n          tech.addWebVttScript_();\n        });\n      }\n    }), options);\n\n    _this.setupSegmentLoaderListeners_();\n\n    if (_this.experimentalBufferBasedABR) {\n      _this.masterPlaylistLoader_.one('loadedplaylist', function () {\n        return _this.startABRTimer_();\n      });\n\n      _this.tech_.on('pause', function () {\n        return _this.stopABRTimer_();\n      });\n\n      _this.tech_.on('play', function () {\n        return _this.startABRTimer_();\n      });\n    } // Create SegmentLoader stat-getters\n    // mediaRequests_\n    // mediaRequestsAborted_\n    // mediaRequestsTimedout_\n    // mediaRequestsErrored_\n    // mediaTransferDuration_\n    // mediaBytesTransferred_\n    // mediaAppends_\n\n\n    loaderStats.forEach(function (stat) {\n      _this[stat + '_'] = sumLoaderStat.bind(_assertThisInitialized(_this), stat);\n    });\n    _this.logger_ = logger('MPC');\n    _this.triggeredFmp4Usage = false;\n\n    if (_this.tech_.preload() === 'none') {\n      _this.loadOnPlay_ = function () {\n        _this.loadOnPlay_ = null;\n\n        _this.masterPlaylistLoader_.load();\n      };\n\n      _this.tech_.one('play', _this.loadOnPlay_);\n    } else {\n      _this.masterPlaylistLoader_.load();\n    }\n\n    _this.timeToLoadedData__ = -1;\n    _this.mainAppendsToLoadedData__ = -1;\n    _this.audioAppendsToLoadedData__ = -1;\n    var event = _this.tech_.preload() === 'none' ? 'play' : 'loadstart'; // start the first frame timer on loadstart or play (for preload none)\n\n    _this.tech_.one(event, function () {\n      var timeToLoadedDataStart = Date.now();\n\n      _this.tech_.one('loadeddata', function () {\n        _this.timeToLoadedData__ = Date.now() - timeToLoadedDataStart;\n        _this.mainAppendsToLoadedData__ = _this.mainSegmentLoader_.mediaAppends;\n        _this.audioAppendsToLoadedData__ = _this.audioSegmentLoader_.mediaAppends;\n      });\n    });\n\n    return _this;\n  }\n\n  var _proto = MasterPlaylistController.prototype;\n\n  _proto.mainAppendsToLoadedData_ = function mainAppendsToLoadedData_() {\n    return this.mainAppendsToLoadedData__;\n  };\n\n  _proto.audioAppendsToLoadedData_ = function audioAppendsToLoadedData_() {\n    return this.audioAppendsToLoadedData__;\n  };\n\n  _proto.appendsToLoadedData_ = function appendsToLoadedData_() {\n    var main = this.mainAppendsToLoadedData_();\n    var audio = this.audioAppendsToLoadedData_();\n\n    if (main === -1 || audio === -1) {\n      return -1;\n    }\n\n    return main + audio;\n  };\n\n  _proto.timeToLoadedData_ = function timeToLoadedData_() {\n    return this.timeToLoadedData__;\n  }\n  /**\n   * Run selectPlaylist and switch to the new playlist if we should\n   *\n   * @param {string} [reason=abr] a reason for why the ABR check is made\n   * @private\n   */\n  ;\n\n  _proto.checkABR_ = function checkABR_(reason) {\n    if (reason === void 0) {\n      reason = 'abr';\n    }\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (nextPlaylist && this.shouldSwitchToMedia_(nextPlaylist)) {\n      this.switchMedia_(nextPlaylist, reason);\n    }\n  };\n\n  _proto.switchMedia_ = function switchMedia_(playlist, cause, delay) {\n    var oldMedia = this.media();\n    var oldId = oldMedia && (oldMedia.id || oldMedia.uri);\n    var newId = playlist.id || playlist.uri;\n\n    if (oldId && oldId !== newId) {\n      this.logger_(\"switch media \" + oldId + \" -> \" + newId + \" from \" + cause);\n      this.tech_.trigger({\n        type: 'usage',\n        name: \"vhs-rendition-change-\" + cause\n      });\n    }\n\n    this.masterPlaylistLoader_.media(playlist, delay);\n  }\n  /**\n   * Start a timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.startABRTimer_ = function startABRTimer_() {\n    var _this2 = this;\n\n    this.stopABRTimer_();\n    this.abrTimer_ = window$1.setInterval(function () {\n      return _this2.checkABR_();\n    }, 250);\n  }\n  /**\n   * Stop the timer that periodically calls checkABR_\n   *\n   * @private\n   */\n  ;\n\n  _proto.stopABRTimer_ = function stopABRTimer_() {\n    // if we're scrubbing, we don't need to pause.\n    // This getter will be added to Video.js in version 7.11.\n    if (this.tech_.scrubbing && this.tech_.scrubbing()) {\n      return;\n    }\n\n    window$1.clearInterval(this.abrTimer_);\n    this.abrTimer_ = null;\n  }\n  /**\n   * Get a list of playlists for the currently selected audio playlist\n   *\n   * @return {Array} the array of audio playlists\n   */\n  ;\n\n  _proto.getAudioTrackPlaylists_ = function getAudioTrackPlaylists_() {\n    var master = this.master();\n    var defaultPlaylists = master && master.playlists || []; // if we don't have any audio groups then we can only\n    // assume that the audio tracks are contained in masters\n    // playlist array, use that or an empty array.\n\n    if (!master || !master.mediaGroups || !master.mediaGroups.AUDIO) {\n      return defaultPlaylists;\n    }\n\n    var AUDIO = master.mediaGroups.AUDIO;\n    var groupKeys = Object.keys(AUDIO);\n    var track; // get the current active track\n\n    if (Object.keys(this.mediaTypes_.AUDIO.groups).length) {\n      track = this.mediaTypes_.AUDIO.activeTrack(); // or get the default track from master if mediaTypes_ isn't setup yet\n    } else {\n      // default group is `main` or just the first group.\n      var defaultGroup = AUDIO.main || groupKeys.length && AUDIO[groupKeys[0]];\n\n      for (var label in defaultGroup) {\n        if (defaultGroup[label][\"default\"]) {\n          track = {\n            label: label\n          };\n          break;\n        }\n      }\n    } // no active track no playlists.\n\n\n    if (!track) {\n      return defaultPlaylists;\n    }\n\n    var playlists = []; // get all of the playlists that are possible for the\n    // active track.\n\n    for (var group in AUDIO) {\n      if (AUDIO[group][track.label]) {\n        var properties = AUDIO[group][track.label];\n\n        if (properties.playlists && properties.playlists.length) {\n          playlists.push.apply(playlists, properties.playlists);\n        } else if (properties.uri) {\n          playlists.push(properties);\n        } else if (master.playlists.length) {\n          // if an audio group does not have a uri\n          // see if we have main playlists that use it as a group.\n          // if we do then add those to the playlists list.\n          for (var i = 0; i < master.playlists.length; i++) {\n            var playlist = master.playlists[i];\n\n            if (playlist.attributes && playlist.attributes.AUDIO && playlist.attributes.AUDIO === group) {\n              playlists.push(playlist);\n            }\n          }\n        }\n      }\n    }\n\n    if (!playlists.length) {\n      return defaultPlaylists;\n    }\n\n    return playlists;\n  }\n  /**\n   * Register event handlers on the master playlist loader. A helper\n   * function for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupMasterPlaylistLoaderListeners_ = function setupMasterPlaylistLoaderListeners_() {\n    var _this3 = this;\n\n    this.masterPlaylistLoader_.on('loadedmetadata', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      } // if this isn't a live video and preload permits, start\n      // downloading segments\n\n\n      if (media.endList && _this3.tech_.preload() !== 'none') {\n        _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n        _this3.mainSegmentLoader_.load();\n      }\n\n      setupMediaGroups({\n        sourceType: _this3.sourceType_,\n        segmentLoaders: {\n          AUDIO: _this3.audioSegmentLoader_,\n          SUBTITLES: _this3.subtitleSegmentLoader_,\n          main: _this3.mainSegmentLoader_\n        },\n        tech: _this3.tech_,\n        requestOptions: _this3.requestOptions_,\n        masterPlaylistLoader: _this3.masterPlaylistLoader_,\n        vhs: _this3.vhs_,\n        master: _this3.master(),\n        mediaTypes: _this3.mediaTypes_,\n        blacklistCurrentPlaylist: _this3.blacklistCurrentPlaylist.bind(_this3)\n      });\n\n      _this3.triggerPresenceUsage_(_this3.master(), media);\n\n      _this3.setupFirstPlay();\n\n      if (!_this3.mediaTypes_.AUDIO.activePlaylistLoader || _this3.mediaTypes_.AUDIO.activePlaylistLoader.media()) {\n        _this3.trigger('selectedinitialmedia');\n      } else {\n        // We must wait for the active audio playlist loader to\n        // finish setting up before triggering this event so the\n        // representations API and EME setup is correct\n        _this3.mediaTypes_.AUDIO.activePlaylistLoader.one('loadedmetadata', function () {\n          _this3.trigger('selectedinitialmedia');\n        });\n      }\n    });\n    this.masterPlaylistLoader_.on('loadedplaylist', function () {\n      if (_this3.loadOnPlay_) {\n        _this3.tech_.off('play', _this3.loadOnPlay_);\n      }\n\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media();\n\n      if (!updatedPlaylist) {\n        // exclude any variants that are not supported by the browser before selecting\n        // an initial media as the playlist selectors do not consider browser support\n        _this3.excludeUnsupportedVariants_();\n\n        var selectedMedia;\n\n        if (_this3.enableLowInitialPlaylist) {\n          selectedMedia = _this3.selectInitialPlaylist();\n        }\n\n        if (!selectedMedia) {\n          selectedMedia = _this3.selectPlaylist();\n        }\n\n        if (!selectedMedia || !_this3.shouldSwitchToMedia_(selectedMedia)) {\n          return;\n        }\n\n        _this3.initialMedia_ = selectedMedia;\n\n        _this3.switchMedia_(_this3.initialMedia_, 'initial'); // Under the standard case where a source URL is provided, loadedplaylist will\n        // fire again since the playlist will be requested. In the case of vhs-json\n        // (where the manifest object is provided as the source), when the media\n        // playlist's `segments` list is already available, a media playlist won't be\n        // requested, and loadedplaylist won't fire again, so the playlist handler must be\n        // called on its own here.\n\n\n        var haveJsonSource = _this3.sourceType_ === 'vhs-json' && _this3.initialMedia_.segments;\n\n        if (!haveJsonSource) {\n          return;\n        }\n\n        updatedPlaylist = _this3.initialMedia_;\n      }\n\n      _this3.handleUpdatedMediaPlaylist(updatedPlaylist);\n    });\n    this.masterPlaylistLoader_.on('error', function () {\n      _this3.blacklistCurrentPlaylist(_this3.masterPlaylistLoader_.error);\n    });\n    this.masterPlaylistLoader_.on('mediachanging', function () {\n      _this3.mainSegmentLoader_.abort();\n\n      _this3.mainSegmentLoader_.pause();\n    });\n    this.masterPlaylistLoader_.on('mediachange', function () {\n      var media = _this3.masterPlaylistLoader_.media();\n\n      var requestTimeout = media.targetDuration * 1.5 * 1000; // If we don't have any more available playlists, we don't want to\n      // timeout the request.\n\n      if (isLowestEnabledRendition(_this3.masterPlaylistLoader_.master, _this3.masterPlaylistLoader_.media())) {\n        _this3.requestOptions_.timeout = 0;\n      } else {\n        _this3.requestOptions_.timeout = requestTimeout;\n      }\n\n      _this3.masterPlaylistLoader_.load(); // TODO: Create a new event on the PlaylistLoader that signals\n      // that the segments have changed in some way and use that to\n      // update the SegmentLoader instead of doing it twice here and\n      // on `loadedplaylist`\n\n\n      _this3.mainSegmentLoader_.playlist(media, _this3.requestOptions_);\n\n      _this3.mainSegmentLoader_.load();\n\n      _this3.tech_.trigger({\n        type: 'mediachange',\n        bubbles: true\n      });\n    });\n    this.masterPlaylistLoader_.on('playlistunchanged', function () {\n      var updatedPlaylist = _this3.masterPlaylistLoader_.media(); // ignore unchanged playlists that have already been\n      // excluded for not-changing. We likely just have a really slowly updating\n      // playlist.\n\n\n      if (updatedPlaylist.lastExcludeReason_ === 'playlist-unchanged') {\n        return;\n      }\n\n      var playlistOutdated = _this3.stuckAtPlaylistEnd_(updatedPlaylist);\n\n      if (playlistOutdated) {\n        // Playlist has stopped updating and we're stuck at its end. Try to\n        // blacklist it and switch to another playlist in the hope that that\n        // one is updating (and give the player a chance to re-adjust to the\n        // safe live point).\n        _this3.blacklistCurrentPlaylist({\n          message: 'Playlist no longer updating.',\n          reason: 'playlist-unchanged'\n        }); // useful for monitoring QoS\n\n\n        _this3.tech_.trigger('playliststuck');\n      }\n    });\n    this.masterPlaylistLoader_.on('renditiondisabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-disabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-disabled'\n      });\n    });\n    this.masterPlaylistLoader_.on('renditionenabled', function () {\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-rendition-enabled'\n      });\n\n      _this3.tech_.trigger({\n        type: 'usage',\n        name: 'hls-rendition-enabled'\n      });\n    });\n  }\n  /**\n   * Given an updated media playlist (whether it was loaded for the first time, or\n   * refreshed for live playlists), update any relevant properties and state to reflect\n   * changes in the media that should be accounted for (e.g., cues and duration).\n   *\n   * @param {Object} updatedPlaylist the updated media playlist object\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleUpdatedMediaPlaylist = function handleUpdatedMediaPlaylist(updatedPlaylist) {\n    if (this.useCueTags_) {\n      this.updateAdCues_(updatedPlaylist);\n    } // TODO: Create a new event on the PlaylistLoader that signals\n    // that the segments have changed in some way and use that to\n    // update the SegmentLoader instead of doing it twice here and\n    // on `mediachange`\n\n\n    this.mainSegmentLoader_.playlist(updatedPlaylist, this.requestOptions_);\n    this.updateDuration(!updatedPlaylist.endList); // If the player isn't paused, ensure that the segment loader is running,\n    // as it is possible that it was temporarily stopped while waiting for\n    // a playlist (e.g., in case the playlist errored and we re-requested it).\n\n    if (!this.tech_.paused()) {\n      this.mainSegmentLoader_.load();\n\n      if (this.audioSegmentLoader_) {\n        this.audioSegmentLoader_.load();\n      }\n    }\n  }\n  /**\n   * A helper function for triggerring presence usage events once per source\n   *\n   * @private\n   */\n  ;\n\n  _proto.triggerPresenceUsage_ = function triggerPresenceUsage_(master, media) {\n    var mediaGroups = master.mediaGroups || {};\n    var defaultDemuxed = true;\n    var audioGroupKeys = Object.keys(mediaGroups.AUDIO);\n\n    for (var mediaGroup in mediaGroups.AUDIO) {\n      for (var label in mediaGroups.AUDIO[mediaGroup]) {\n        var properties = mediaGroups.AUDIO[mediaGroup][label];\n\n        if (!properties.uri) {\n          defaultDemuxed = false;\n        }\n      }\n    }\n\n    if (defaultDemuxed) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-demuxed'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-demuxed'\n      });\n    }\n\n    if (Object.keys(mediaGroups.SUBTITLES).length) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-webvtt'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-webvtt'\n      });\n    }\n\n    if (Vhs$1.Playlist.isAes(media)) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-aes'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-aes'\n      });\n    }\n\n    if (audioGroupKeys.length && Object.keys(mediaGroups.AUDIO[audioGroupKeys[0]]).length > 1) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-alternate-audio'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-alternate-audio'\n      });\n    }\n\n    if (this.useCueTags_) {\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-playlist-cue-tags'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-playlist-cue-tags'\n      });\n    }\n  };\n\n  _proto.shouldSwitchToMedia_ = function shouldSwitchToMedia_(nextPlaylist) {\n    var currentPlaylist = this.masterPlaylistLoader_.media() || this.masterPlaylistLoader_.pendingMedia_;\n    var currentTime = this.tech_.currentTime();\n    var bufferLowWaterLine = this.bufferLowWaterLine();\n    var bufferHighWaterLine = this.bufferHighWaterLine();\n    var buffered = this.tech_.buffered();\n    return shouldSwitchToMedia({\n      buffered: buffered,\n      currentTime: currentTime,\n      currentPlaylist: currentPlaylist,\n      nextPlaylist: nextPlaylist,\n      bufferLowWaterLine: bufferLowWaterLine,\n      bufferHighWaterLine: bufferHighWaterLine,\n      duration: this.duration(),\n      experimentalBufferBasedABR: this.experimentalBufferBasedABR,\n      log: this.logger_\n    });\n  }\n  /**\n   * Register event handlers on the segment loaders. A helper function\n   * for construction time.\n   *\n   * @private\n   */\n  ;\n\n  _proto.setupSegmentLoaderListeners_ = function setupSegmentLoaderListeners_() {\n    var _this4 = this;\n\n    this.mainSegmentLoader_.on('bandwidthupdate', function () {\n      // Whether or not buffer based ABR or another ABR is used, on a bandwidth change it's\n      // useful to check to see if a rendition switch should be made.\n      _this4.checkABR_('bandwidthupdate');\n\n      _this4.tech_.trigger('bandwidthupdate');\n    });\n    this.mainSegmentLoader_.on('timeout', function () {\n      if (_this4.experimentalBufferBasedABR) {\n        // If a rendition change is needed, then it would've be done on `bandwidthupdate`.\n        // Here the only consideration is that for buffer based ABR there's no guarantee\n        // of an immediate switch (since the bandwidth is averaged with a timeout\n        // bandwidth value of 1), so force a load on the segment loader to keep it going.\n        _this4.mainSegmentLoader_.load();\n      }\n    }); // `progress` events are not reliable enough of a bandwidth measure to trigger buffer\n    // based ABR.\n\n    if (!this.experimentalBufferBasedABR) {\n      this.mainSegmentLoader_.on('progress', function () {\n        _this4.trigger('progress');\n      });\n    }\n\n    this.mainSegmentLoader_.on('error', function () {\n      _this4.blacklistCurrentPlaylist(_this4.mainSegmentLoader_.error());\n    });\n    this.mainSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.mainSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.mainSegmentLoader_.on('timestampoffset', function () {\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-timestamp-offset'\n      });\n\n      _this4.tech_.trigger({\n        type: 'usage',\n        name: 'hls-timestamp-offset'\n      });\n    });\n    this.audioSegmentLoader_.on('syncinfoupdate', function () {\n      _this4.onSyncInfoUpdate_();\n    });\n    this.audioSegmentLoader_.on('appenderror', function () {\n      _this4.error = _this4.audioSegmentLoader_.error_;\n\n      _this4.trigger('error');\n    });\n    this.mainSegmentLoader_.on('ended', function () {\n      _this4.logger_('main segment loader ended');\n\n      _this4.onEndOfStream();\n    });\n    this.mainSegmentLoader_.on('earlyabort', function (event) {\n      // never try to early abort with the new ABR algorithm\n      if (_this4.experimentalBufferBasedABR) {\n        return;\n      }\n\n      _this4.delegateLoaders_('all', ['abort']);\n\n      _this4.blacklistCurrentPlaylist({\n        message: 'Aborted early because there isn\\'t enough bandwidth to complete the ' + 'request without rebuffering.'\n      }, ABORT_EARLY_BLACKLIST_SECONDS);\n    });\n\n    var updateCodecs = function updateCodecs() {\n      if (!_this4.sourceUpdater_.hasCreatedSourceBuffers()) {\n        return _this4.tryToCreateSourceBuffers_();\n      }\n\n      var codecs = _this4.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n\n      if (!codecs) {\n        return;\n      }\n\n      _this4.sourceUpdater_.addOrChangeSourceBuffers(codecs);\n    };\n\n    this.mainSegmentLoader_.on('trackinfo', updateCodecs);\n    this.audioSegmentLoader_.on('trackinfo', updateCodecs);\n    this.mainSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('fmp4', function () {\n      if (!_this4.triggeredFmp4Usage) {\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'vhs-fmp4'\n        });\n\n        _this4.tech_.trigger({\n          type: 'usage',\n          name: 'hls-fmp4'\n        });\n\n        _this4.triggeredFmp4Usage = true;\n      }\n    });\n    this.audioSegmentLoader_.on('ended', function () {\n      _this4.logger_('audioSegmentLoader ended');\n\n      _this4.onEndOfStream();\n    });\n  };\n\n  _proto.mediaSecondsLoaded_ = function mediaSecondsLoaded_() {\n    return Math.max(this.audioSegmentLoader_.mediaSecondsLoaded + this.mainSegmentLoader_.mediaSecondsLoaded);\n  }\n  /**\n   * Call load on our SegmentLoaders\n   */\n  ;\n\n  _proto.load = function load() {\n    this.mainSegmentLoader_.load();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.load();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.load();\n    }\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions without performing destructive actions, like\n   * removing already buffered content\n   *\n   * @private\n   * @deprecated\n   */\n  ;\n\n  _proto.smoothQualityChange_ = function smoothQualityChange_(media) {\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    this.fastQualityChange_(media);\n  }\n  /**\n   * Re-tune playback quality level for the current player\n   * conditions. This method will perform destructive actions like removing\n   * already buffered content in order to readjust the currently active\n   * playlist quickly. This is good for manual quality changes\n   *\n   * @private\n   */\n  ;\n\n  _proto.fastQualityChange_ = function fastQualityChange_(media) {\n    var _this5 = this;\n\n    if (media === void 0) {\n      media = this.selectPlaylist();\n    }\n\n    if (media === this.masterPlaylistLoader_.media()) {\n      this.logger_('skipping fastQualityChange because new media is same as old');\n      return;\n    }\n\n    this.switchMedia_(media, 'fast-quality'); // Delete all buffered data to allow an immediate quality switch, then seek to give\n    // the browser a kick to remove any cached frames from the previous rendtion (.04 seconds\n    // ahead is roughly the minimum that will accomplish this across a variety of content\n    // in IE and Edge, but seeking in place is sufficient on all other browsers)\n    // Edge/IE bug: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/14600375/\n    // Chrome bug: https://bugs.chromium.org/p/chromium/issues/detail?id=651904\n\n    this.mainSegmentLoader_.resetEverything(function () {\n      // Since this is not a typical seek, we avoid the seekTo method which can cause segments\n      // from the previously enabled rendition to load before the new playlist has finished loading\n      if (videojs.browser.IE_VERSION || videojs.browser.IS_EDGE) {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime() + 0.04);\n      } else {\n        _this5.tech_.setCurrentTime(_this5.tech_.currentTime());\n      }\n    }); // don't need to reset audio as it is reset when media changes\n  }\n  /**\n   * Begin playback.\n   */\n  ;\n\n  _proto.play = function play() {\n    if (this.setupFirstPlay()) {\n      return;\n    }\n\n    if (this.tech_.ended()) {\n      this.tech_.setCurrentTime(0);\n    }\n\n    if (this.hasPlayed_) {\n      this.load();\n    }\n\n    var seekable = this.tech_.seekable(); // if the viewer has paused and we fell out of the live window,\n    // seek forward to the live point\n\n    if (this.tech_.duration() === Infinity) {\n      if (this.tech_.currentTime() < seekable.start(0)) {\n        return this.tech_.setCurrentTime(seekable.end(seekable.length - 1));\n      }\n    }\n  }\n  /**\n   * Seek to the latest media position if this is a live video and the\n   * player and video are loaded and initialized.\n   */\n  ;\n\n  _proto.setupFirstPlay = function setupFirstPlay() {\n    var _this6 = this;\n\n    var media = this.masterPlaylistLoader_.media(); // Check that everything is ready to begin buffering for the first call to play\n    //  If 1) there is no active media\n    //     2) the player is paused\n    //     3) the first play has already been setup\n    // then exit early\n\n    if (!media || this.tech_.paused() || this.hasPlayed_) {\n      return false;\n    } // when the video is a live stream\n\n\n    if (!media.endList) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        // without a seekable range, the player cannot seek to begin buffering at the live\n        // point\n        return false;\n      }\n\n      if (videojs.browser.IE_VERSION && this.tech_.readyState() === 0) {\n        // IE11 throws an InvalidStateError if you try to set currentTime while the\n        // readyState is 0, so it must be delayed until the tech fires loadedmetadata.\n        this.tech_.one('loadedmetadata', function () {\n          _this6.trigger('firstplay');\n\n          _this6.tech_.setCurrentTime(seekable.end(0));\n\n          _this6.hasPlayed_ = true;\n        });\n        return false;\n      } // trigger firstplay to inform the source handler to ignore the next seek event\n\n\n      this.trigger('firstplay'); // seek to the live point\n\n      this.tech_.setCurrentTime(seekable.end(0));\n    }\n\n    this.hasPlayed_ = true; // we can begin loading now that everything is ready\n\n    this.load();\n    return true;\n  }\n  /**\n   * handle the sourceopen event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceOpen_ = function handleSourceOpen_() {\n    // Only attempt to create the source buffer if none already exist.\n    // handleSourceOpen is also called when we are \"re-opening\" a source buffer\n    // after `endOfStream` has been called (in response to a seek for instance)\n    this.tryToCreateSourceBuffers_(); // if autoplay is enabled, begin playback. This is duplicative of\n    // code in video.js but is required because play() must be invoked\n    // *after* the media source has opened.\n\n    if (this.tech_.autoplay()) {\n      var playPromise = this.tech_.play(); // Catch/silence error when a pause interrupts a play request\n      // on browsers which return a promise\n\n      if (typeof playPromise !== 'undefined' && typeof playPromise.then === 'function') {\n        playPromise.then(null, function (e) {});\n      }\n    }\n\n    this.trigger('sourceopen');\n  }\n  /**\n   * handle the sourceended event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleSourceEnded_ = function handleSourceEnded_() {\n    if (!this.inbandTextTracks_.metadataTrack_) {\n      return;\n    }\n\n    var cues = this.inbandTextTracks_.metadataTrack_.cues;\n\n    if (!cues || !cues.length) {\n      return;\n    }\n\n    var duration = this.duration();\n    cues[cues.length - 1].endTime = isNaN(duration) || Math.abs(duration) === Infinity ? Number.MAX_VALUE : duration;\n  }\n  /**\n   * handle the durationchange event on the MediaSource\n   *\n   * @private\n   */\n  ;\n\n  _proto.handleDurationChange_ = function handleDurationChange_() {\n    this.tech_.trigger('durationchange');\n  }\n  /**\n   * Calls endOfStream on the media source when all active stream types have called\n   * endOfStream\n   *\n   * @param {string} streamType\n   *        Stream type of the segment loader that called endOfStream\n   * @private\n   */\n  ;\n\n  _proto.onEndOfStream = function onEndOfStream() {\n    var isEndOfStream = this.mainSegmentLoader_.ended_;\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      var mainMediaInfo = this.mainSegmentLoader_.getCurrentMediaInfo_(); // if the audio playlist loader exists, then alternate audio is active\n\n      if (!mainMediaInfo || mainMediaInfo.hasVideo) {\n        // if we do not know if the main segment loader contains video yet or if we\n        // definitively know the main segment loader contains video, then we need to wait\n        // for both main and audio segment loaders to call endOfStream\n        isEndOfStream = isEndOfStream && this.audioSegmentLoader_.ended_;\n      } else {\n        // otherwise just rely on the audio loader\n        isEndOfStream = this.audioSegmentLoader_.ended_;\n      }\n    }\n\n    if (!isEndOfStream) {\n      return;\n    }\n\n    this.stopABRTimer_();\n    this.sourceUpdater_.endOfStream();\n  }\n  /**\n   * Check if a playlist has stopped being updated\n   *\n   * @param {Object} playlist the media playlist object\n   * @return {boolean} whether the playlist has stopped being updated or not\n   */\n  ;\n\n  _proto.stuckAtPlaylistEnd_ = function stuckAtPlaylistEnd_(playlist) {\n    var seekable = this.seekable();\n\n    if (!seekable.length) {\n      // playlist doesn't have enough information to determine whether we are stuck\n      return false;\n    }\n\n    var expired = this.syncController_.getExpiredTime(playlist, this.duration());\n\n    if (expired === null) {\n      return false;\n    } // does not use the safe live end to calculate playlist end, since we\n    // don't want to say we are stuck while there is still content\n\n\n    var absolutePlaylistEnd = Vhs$1.Playlist.playlistEnd(playlist, expired);\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (!buffered.length) {\n      // return true if the playhead reached the absolute end of the playlist\n      return absolutePlaylistEnd - currentTime <= SAFE_TIME_DELTA;\n    }\n\n    var bufferedEnd = buffered.end(buffered.length - 1); // return true if there is too little buffer left and buffer has reached absolute\n    // end of playlist\n\n    return bufferedEnd - currentTime <= SAFE_TIME_DELTA && absolutePlaylistEnd - bufferedEnd <= SAFE_TIME_DELTA;\n  }\n  /**\n   * Blacklists a playlist when an error occurs for a set amount of time\n   * making it unavailable for selection by the rendition selection algorithm\n   * and then forces a new playlist (rendition) selection.\n   *\n   * @param {Object=} error an optional error that may include the playlist\n   * to blacklist\n   * @param {number=} blacklistDuration an optional number of seconds to blacklist the\n   * playlist\n   */\n  ;\n\n  _proto.blacklistCurrentPlaylist = function blacklistCurrentPlaylist(error, blacklistDuration) {\n    if (error === void 0) {\n      error = {};\n    } // If the `error` was generated by the playlist loader, it will contain\n    // the playlist we were trying to load (but failed) and that should be\n    // blacklisted instead of the currently selected playlist which is likely\n    // out-of-date in this scenario\n\n\n    var currentPlaylist = error.playlist || this.masterPlaylistLoader_.media();\n    blacklistDuration = blacklistDuration || error.blacklistDuration || this.blacklistDuration; // If there is no current playlist, then an error occurred while we were\n    // trying to load the master OR while we were disposing of the tech\n\n    if (!currentPlaylist) {\n      this.error = error;\n\n      if (this.mediaSource.readyState !== 'open') {\n        this.trigger('error');\n      } else {\n        this.sourceUpdater_.endOfStream('network');\n      }\n\n      return;\n    }\n\n    currentPlaylist.playlistErrors_++;\n    var playlists = this.masterPlaylistLoader_.master.playlists;\n    var enabledPlaylists = playlists.filter(isEnabled);\n    var isFinalRendition = enabledPlaylists.length === 1 && enabledPlaylists[0] === currentPlaylist; // Don't blacklist the only playlist unless it was blacklisted\n    // forever\n\n    if (playlists.length === 1 && blacklistDuration !== Infinity) {\n      videojs.log.warn(\"Problem encountered with playlist \" + currentPlaylist.id + \". \" + 'Trying again since it is the only playlist.');\n      this.tech_.trigger('retryplaylist'); // if this is a final rendition, we should delay\n\n      return this.masterPlaylistLoader_.load(isFinalRendition);\n    }\n\n    if (isFinalRendition) {\n      // Since we're on the final non-blacklisted playlist, and we're about to blacklist\n      // it, instead of erring the player or retrying this playlist, clear out the current\n      // blacklist. This allows other playlists to be attempted in case any have been\n      // fixed.\n      var reincluded = false;\n      playlists.forEach(function (playlist) {\n        // skip current playlist which is about to be blacklisted\n        if (playlist === currentPlaylist) {\n          return;\n        }\n\n        var excludeUntil = playlist.excludeUntil; // a playlist cannot be reincluded if it wasn't excluded to begin with.\n\n        if (typeof excludeUntil !== 'undefined' && excludeUntil !== Infinity) {\n          reincluded = true;\n          delete playlist.excludeUntil;\n        }\n      });\n\n      if (reincluded) {\n        videojs.log.warn('Removing other playlists from the exclusion list because the last ' + 'rendition is about to be excluded.'); // Technically we are retrying a playlist, in that we are simply retrying a previous\n        // playlist. This is needed for users relying on the retryplaylist event to catch a\n        // case where the player might be stuck and looping through \"dead\" playlists.\n\n        this.tech_.trigger('retryplaylist');\n      }\n    } // Blacklist this playlist\n\n\n    var excludeUntil;\n\n    if (currentPlaylist.playlistErrors_ > this.maxPlaylistRetries) {\n      excludeUntil = Infinity;\n    } else {\n      excludeUntil = Date.now() + blacklistDuration * 1000;\n    }\n\n    currentPlaylist.excludeUntil = excludeUntil;\n\n    if (error.reason) {\n      currentPlaylist.lastExcludeReason_ = error.reason;\n    }\n\n    this.tech_.trigger('blacklistplaylist');\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-rendition-blacklisted'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-rendition-blacklisted'\n    }); // TODO: should we select a new playlist if this blacklist wasn't for the currentPlaylist?\n    // Would be something like media().id !=== currentPlaylist.id and we  would need something\n    // like `pendingMedia` in playlist loaders to check against that too. This will prevent us\n    // from loading a new playlist on any blacklist.\n    // Select a new playlist\n\n    var nextPlaylist = this.selectPlaylist();\n\n    if (!nextPlaylist) {\n      this.error = 'Playback cannot continue. No available working or supported playlists.';\n      this.trigger('error');\n      return;\n    }\n\n    var logFn = error.internal ? this.logger_ : videojs.log.warn;\n    var errorMessage = error.message ? ' ' + error.message : '';\n    logFn((error.internal ? 'Internal problem' : 'Problem') + \" encountered with playlist \" + currentPlaylist.id + \".\" + (errorMessage + \" Switching to playlist \" + nextPlaylist.id + \".\")); // if audio group changed reset audio loaders\n\n    if (nextPlaylist.attributes.AUDIO !== currentPlaylist.attributes.AUDIO) {\n      this.delegateLoaders_('audio', ['abort', 'pause']);\n    } // if subtitle group changed reset subtitle loaders\n\n\n    if (nextPlaylist.attributes.SUBTITLES !== currentPlaylist.attributes.SUBTITLES) {\n      this.delegateLoaders_('subtitle', ['abort', 'pause']);\n    }\n\n    this.delegateLoaders_('main', ['abort', 'pause']);\n    var delayDuration = nextPlaylist.targetDuration / 2 * 1000 || 5 * 1000;\n    var shouldDelay = typeof nextPlaylist.lastRequest === 'number' && Date.now() - nextPlaylist.lastRequest <= delayDuration; // delay if it's a final rendition or if the last refresh is sooner than half targetDuration\n\n    return this.switchMedia_(nextPlaylist, 'exclude', isFinalRendition || shouldDelay);\n  }\n  /**\n   * Pause all segment/playlist loaders\n   */\n  ;\n\n  _proto.pauseLoading = function pauseLoading() {\n    this.delegateLoaders_('all', ['abort', 'pause']);\n    this.stopABRTimer_();\n  }\n  /**\n   * Call a set of functions in order on playlist loaders, segment loaders,\n   * or both types of loaders.\n   *\n   * @param {string} filter\n   *        Filter loaders that should call fnNames using a string. Can be:\n   *        * all - run on all loaders\n   *        * audio - run on all audio loaders\n   *        * subtitle - run on all subtitle loaders\n   *        * main - run on the main/master loaders\n   *\n   * @param {Array|string} fnNames\n   *        A string or array of function names to call.\n   */\n  ;\n\n  _proto.delegateLoaders_ = function delegateLoaders_(filter, fnNames) {\n    var _this7 = this;\n\n    var loaders = [];\n    var dontFilterPlaylist = filter === 'all';\n\n    if (dontFilterPlaylist || filter === 'main') {\n      loaders.push(this.masterPlaylistLoader_);\n    }\n\n    var mediaTypes = [];\n\n    if (dontFilterPlaylist || filter === 'audio') {\n      mediaTypes.push('AUDIO');\n    }\n\n    if (dontFilterPlaylist || filter === 'subtitle') {\n      mediaTypes.push('CLOSED-CAPTIONS');\n      mediaTypes.push('SUBTITLES');\n    }\n\n    mediaTypes.forEach(function (mediaType) {\n      var loader = _this7.mediaTypes_[mediaType] && _this7.mediaTypes_[mediaType].activePlaylistLoader;\n\n      if (loader) {\n        loaders.push(loader);\n      }\n    });\n    ['main', 'audio', 'subtitle'].forEach(function (name) {\n      var loader = _this7[name + \"SegmentLoader_\"];\n\n      if (loader && (filter === name || filter === 'all')) {\n        loaders.push(loader);\n      }\n    });\n    loaders.forEach(function (loader) {\n      return fnNames.forEach(function (fnName) {\n        if (typeof loader[fnName] === 'function') {\n          loader[fnName]();\n        }\n      });\n    });\n  }\n  /**\n   * set the current time on all segment loaders\n   *\n   * @param {TimeRange} currentTime the current time to set\n   * @return {TimeRange} the current time\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    var buffered = findRange(this.tech_.buffered(), currentTime);\n\n    if (!(this.masterPlaylistLoader_ && this.masterPlaylistLoader_.media())) {\n      // return immediately if the metadata is not ready yet\n      return 0;\n    } // it's clearly an edge-case but don't thrown an error if asked to\n    // seek within an empty playlist\n\n\n    if (!this.masterPlaylistLoader_.media().segments) {\n      return 0;\n    } // if the seek location is already buffered, continue buffering as usual\n\n\n    if (buffered && buffered.length) {\n      return currentTime;\n    } // cancel outstanding requests so we begin buffering at the new\n    // location\n\n\n    this.mainSegmentLoader_.resetEverything();\n    this.mainSegmentLoader_.abort();\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      this.audioSegmentLoader_.resetEverything();\n      this.audioSegmentLoader_.abort();\n    }\n\n    if (this.mediaTypes_.SUBTITLES.activePlaylistLoader) {\n      this.subtitleSegmentLoader_.resetEverything();\n      this.subtitleSegmentLoader_.abort();\n    } // start segment loader loading in case they are paused\n\n\n    this.load();\n  }\n  /**\n   * get the current duration\n   *\n   * @return {TimeRange} the duration\n   */\n  ;\n\n  _proto.duration = function duration() {\n    if (!this.masterPlaylistLoader_) {\n      return 0;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      // no playlists loaded yet, so can't determine a duration\n      return 0;\n    } // Don't rely on the media source for duration in the case of a live playlist since\n    // setting the native MediaSource's duration to infinity ends up with consequences to\n    // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n    //\n    // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n    // however, few browsers have support for setLiveSeekableRange()\n    // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n    //\n    // Until a time when the duration of the media source can be set to infinity, and a\n    // seekable range specified across browsers, just return Infinity.\n\n\n    if (!media.endList) {\n      return Infinity;\n    } // Since this is a VOD video, it is safe to rely on the media source's duration (if\n    // available). If it's not available, fall back to a playlist-calculated estimate.\n\n\n    if (this.mediaSource) {\n      return this.mediaSource.duration;\n    }\n\n    return Vhs$1.Playlist.duration(media);\n  }\n  /**\n   * check the seekable range\n   *\n   * @return {TimeRange} the seekable range\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.seekable_;\n  };\n\n  _proto.onSyncInfoUpdate_ = function onSyncInfoUpdate_() {\n    var audioSeekable; // TODO check for creation of both source buffers before updating seekable\n    //\n    // A fix was made to this function where a check for\n    // this.sourceUpdater_.hasCreatedSourceBuffers\n    // was added to ensure that both source buffers were created before seekable was\n    // updated. However, it originally had a bug where it was checking for a true and\n    // returning early instead of checking for false. Setting it to check for false to\n    // return early though created other issues. A call to play() would check for seekable\n    // end without verifying that a seekable range was present. In addition, even checking\n    // for that didn't solve some issues, as handleFirstPlay is sometimes worked around\n    // due to a media update calling load on the segment loaders, skipping a seek to live,\n    // thereby starting live streams at the beginning of the stream rather than at the end.\n    //\n    // This conditional should be fixed to wait for the creation of two source buffers at\n    // the same time as the other sections of code are fixed to properly seek to live and\n    // not throw an error due to checking for a seekable end when no seekable range exists.\n    //\n    // For now, fall back to the older behavior, with the understanding that the seekable\n    // range may not be completely correct, leading to a suboptimal initial live point.\n\n    if (!this.masterPlaylistLoader_) {\n      return;\n    }\n\n    var media = this.masterPlaylistLoader_.media();\n\n    if (!media) {\n      return;\n    }\n\n    var expired = this.syncController_.getExpiredTime(media, this.duration());\n\n    if (expired === null) {\n      // not enough information to update seekable\n      return;\n    }\n\n    var master = this.masterPlaylistLoader_.master;\n    var mainSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n    if (mainSeekable.length === 0) {\n      return;\n    }\n\n    if (this.mediaTypes_.AUDIO.activePlaylistLoader) {\n      media = this.mediaTypes_.AUDIO.activePlaylistLoader.media();\n      expired = this.syncController_.getExpiredTime(media, this.duration());\n\n      if (expired === null) {\n        return;\n      }\n\n      audioSeekable = Vhs$1.Playlist.seekable(media, expired, Vhs$1.Playlist.liveEdgeDelay(master, media));\n\n      if (audioSeekable.length === 0) {\n        return;\n      }\n    }\n\n    var oldEnd;\n    var oldStart;\n\n    if (this.seekable_ && this.seekable_.length) {\n      oldEnd = this.seekable_.end(0);\n      oldStart = this.seekable_.start(0);\n    }\n\n    if (!audioSeekable) {\n      // seekable has been calculated based on buffering video data so it\n      // can be returned directly\n      this.seekable_ = mainSeekable;\n    } else if (audioSeekable.start(0) > mainSeekable.end(0) || mainSeekable.start(0) > audioSeekable.end(0)) {\n      // seekables are pretty far off, rely on main\n      this.seekable_ = mainSeekable;\n    } else {\n      this.seekable_ = videojs.createTimeRanges([[audioSeekable.start(0) > mainSeekable.start(0) ? audioSeekable.start(0) : mainSeekable.start(0), audioSeekable.end(0) < mainSeekable.end(0) ? audioSeekable.end(0) : mainSeekable.end(0)]]);\n    } // seekable is the same as last time\n\n\n    if (this.seekable_ && this.seekable_.length) {\n      if (this.seekable_.end(0) === oldEnd && this.seekable_.start(0) === oldStart) {\n        return;\n      }\n    }\n\n    this.logger_(\"seekable updated [\" + printableRange(this.seekable_) + \"]\");\n    this.tech_.trigger('seekablechanged');\n  }\n  /**\n   * Update the player duration\n   */\n  ;\n\n  _proto.updateDuration = function updateDuration(isLive) {\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n      this.updateDuration_ = null;\n    }\n\n    if (this.mediaSource.readyState !== 'open') {\n      this.updateDuration_ = this.updateDuration.bind(this, isLive);\n      this.mediaSource.addEventListener('sourceopen', this.updateDuration_);\n      return;\n    }\n\n    if (isLive) {\n      var seekable = this.seekable();\n\n      if (!seekable.length) {\n        return;\n      } // Even in the case of a live playlist, the native MediaSource's duration should not\n      // be set to Infinity (even though this would be expected for a live playlist), since\n      // setting the native MediaSource's duration to infinity ends up with consequences to\n      // seekable behavior. See https://github.com/w3c/media-source/issues/5 for details.\n      //\n      // This is resolved in the spec by https://github.com/w3c/media-source/pull/92,\n      // however, few browsers have support for setLiveSeekableRange()\n      // https://developer.mozilla.org/en-US/docs/Web/API/MediaSource/setLiveSeekableRange\n      //\n      // Until a time when the duration of the media source can be set to infinity, and a\n      // seekable range specified across browsers, the duration should be greater than or\n      // equal to the last possible seekable value.\n      // MediaSource duration starts as NaN\n      // It is possible (and probable) that this case will never be reached for many\n      // sources, since the MediaSource reports duration as the highest value without\n      // accounting for timestamp offset. For example, if the timestamp offset is -100 and\n      // we buffered times 0 to 100 with real times of 100 to 200, even though current\n      // time will be between 0 and 100, the native media source may report the duration\n      // as 200. However, since we report duration separate from the media source (as\n      // Infinity), and as long as the native media source duration value is greater than\n      // our reported seekable range, seeks will work as expected. The large number as\n      // duration for live is actually a strategy used by some players to work around the\n      // issue of live seekable ranges cited above.\n\n\n      if (isNaN(this.mediaSource.duration) || this.mediaSource.duration < seekable.end(seekable.length - 1)) {\n        this.sourceUpdater_.setDuration(seekable.end(seekable.length - 1));\n      }\n\n      return;\n    }\n\n    var buffered = this.tech_.buffered();\n    var duration = Vhs$1.Playlist.duration(this.masterPlaylistLoader_.media());\n\n    if (buffered.length > 0) {\n      duration = Math.max(duration, buffered.end(buffered.length - 1));\n    }\n\n    if (this.mediaSource.duration !== duration) {\n      this.sourceUpdater_.setDuration(duration);\n    }\n  }\n  /**\n   * dispose of the MasterPlaylistController and everything\n   * that it controls\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    var _this8 = this;\n\n    this.trigger('dispose');\n    this.decrypter_.terminate();\n    this.masterPlaylistLoader_.dispose();\n    this.mainSegmentLoader_.dispose();\n\n    if (this.loadOnPlay_) {\n      this.tech_.off('play', this.loadOnPlay_);\n    }\n\n    ['AUDIO', 'SUBTITLES'].forEach(function (type) {\n      var groups = _this8.mediaTypes_[type].groups;\n\n      for (var id in groups) {\n        groups[id].forEach(function (group) {\n          if (group.playlistLoader) {\n            group.playlistLoader.dispose();\n          }\n        });\n      }\n    });\n    this.audioSegmentLoader_.dispose();\n    this.subtitleSegmentLoader_.dispose();\n    this.sourceUpdater_.dispose();\n    this.timelineChangeController_.dispose();\n    this.stopABRTimer_();\n\n    if (this.updateDuration_) {\n      this.mediaSource.removeEventListener('sourceopen', this.updateDuration_);\n    }\n\n    this.mediaSource.removeEventListener('durationchange', this.handleDurationChange_); // load the media source into the player\n\n    this.mediaSource.removeEventListener('sourceopen', this.handleSourceOpen_);\n    this.mediaSource.removeEventListener('sourceended', this.handleSourceEnded_);\n    this.off();\n  }\n  /**\n   * return the master playlist object if we have one\n   *\n   * @return {Object} the master playlist object that we parsed\n   */\n  ;\n\n  _proto.master = function master() {\n    return this.masterPlaylistLoader_.master;\n  }\n  /**\n   * return the currently selected playlist\n   *\n   * @return {Object} the currently selected playlist object that we parsed\n   */\n  ;\n\n  _proto.media = function media() {\n    // playlist loader will not return media if it has not been fully loaded\n    return this.masterPlaylistLoader_.media() || this.initialMedia_;\n  };\n\n  _proto.areMediaTypesKnown_ = function areMediaTypesKnown_() {\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n    var hasMainMediaInfo = !!this.mainSegmentLoader_.getCurrentMediaInfo_(); // if we are not using an audio loader, then we have audio media info\n    // otherwise check on the segment loader.\n\n    var hasAudioMediaInfo = !usingAudioLoader ? true : !!this.audioSegmentLoader_.getCurrentMediaInfo_(); // one or both loaders has not loaded sufficently to get codecs\n\n    if (!hasMainMediaInfo || !hasAudioMediaInfo) {\n      return false;\n    }\n\n    return true;\n  };\n\n  _proto.getCodecsOrExclude_ = function getCodecsOrExclude_() {\n    var _this9 = this;\n\n    var media = {\n      main: this.mainSegmentLoader_.getCurrentMediaInfo_() || {},\n      audio: this.audioSegmentLoader_.getCurrentMediaInfo_() || {}\n    };\n    var playlist = this.mainSegmentLoader_.getPendingSegmentPlaylist() || this.media(); // set \"main\" media equal to video\n\n    media.video = media.main;\n    var playlistCodecs = codecsForPlaylist(this.master(), playlist);\n    var codecs = {};\n    var usingAudioLoader = !!this.mediaTypes_.AUDIO.activePlaylistLoader;\n\n    if (media.main.hasVideo) {\n      codecs.video = playlistCodecs.video || media.main.videoCodec || DEFAULT_VIDEO_CODEC;\n    }\n\n    if (media.main.isMuxed) {\n      codecs.video += \",\" + (playlistCodecs.audio || media.main.audioCodec || DEFAULT_AUDIO_CODEC);\n    }\n\n    if (media.main.hasAudio && !media.main.isMuxed || media.audio.hasAudio || usingAudioLoader) {\n      codecs.audio = playlistCodecs.audio || media.main.audioCodec || media.audio.audioCodec || DEFAULT_AUDIO_CODEC; // set audio isFmp4 so we use the correct \"supports\" function below\n\n      media.audio.isFmp4 = media.main.hasAudio && !media.main.isMuxed ? media.main.isFmp4 : media.audio.isFmp4;\n    } // no codecs, no playback.\n\n\n    if (!codecs.audio && !codecs.video) {\n      this.blacklistCurrentPlaylist({\n        playlist: playlist,\n        message: 'Could not determine codecs for playlist.',\n        blacklistDuration: Infinity\n      });\n      return;\n    } // fmp4 relies on browser support, while ts relies on muxer support\n\n\n    var supportFunction = function supportFunction(isFmp4, codec) {\n      return isFmp4 ? browserSupportsCodec(codec) : muxerSupportsCodec(codec);\n    };\n\n    var unsupportedCodecs = {};\n    var unsupportedAudio;\n    ['video', 'audio'].forEach(function (type) {\n      if (codecs.hasOwnProperty(type) && !supportFunction(media[type].isFmp4, codecs[type])) {\n        var supporter = media[type].isFmp4 ? 'browser' : 'muxer';\n        unsupportedCodecs[supporter] = unsupportedCodecs[supporter] || [];\n        unsupportedCodecs[supporter].push(codecs[type]);\n\n        if (type === 'audio') {\n          unsupportedAudio = supporter;\n        }\n      }\n    });\n\n    if (usingAudioLoader && unsupportedAudio && playlist.attributes.AUDIO) {\n      var audioGroup = playlist.attributes.AUDIO;\n      this.master().playlists.forEach(function (variant) {\n        var variantAudioGroup = variant.attributes && variant.attributes.AUDIO;\n\n        if (variantAudioGroup === audioGroup && variant !== playlist) {\n          variant.excludeUntil = Infinity;\n        }\n      });\n      this.logger_(\"excluding audio group \" + audioGroup + \" as \" + unsupportedAudio + \" does not support codec(s): \\\"\" + codecs.audio + \"\\\"\");\n    } // if we have any unsupported codecs blacklist this playlist.\n\n\n    if (Object.keys(unsupportedCodecs).length) {\n      var message = Object.keys(unsupportedCodecs).reduce(function (acc, supporter) {\n        if (acc) {\n          acc += ', ';\n        }\n\n        acc += supporter + \" does not support codec(s): \\\"\" + unsupportedCodecs[supporter].join(',') + \"\\\"\";\n        return acc;\n      }, '') + '.';\n      this.blacklistCurrentPlaylist({\n        playlist: playlist,\n        internal: true,\n        message: message,\n        blacklistDuration: Infinity\n      });\n      return;\n    } // check if codec switching is happening\n\n\n    if (this.sourceUpdater_.hasCreatedSourceBuffers() && !this.sourceUpdater_.canChangeType()) {\n      var switchMessages = [];\n      ['video', 'audio'].forEach(function (type) {\n        var newCodec = (parseCodecs(_this9.sourceUpdater_.codecs[type] || '')[0] || {}).type;\n        var oldCodec = (parseCodecs(codecs[type] || '')[0] || {}).type;\n\n        if (newCodec && oldCodec && newCodec.toLowerCase() !== oldCodec.toLowerCase()) {\n          switchMessages.push(\"\\\"\" + _this9.sourceUpdater_.codecs[type] + \"\\\" -> \\\"\" + codecs[type] + \"\\\"\");\n        }\n      });\n\n      if (switchMessages.length) {\n        this.blacklistCurrentPlaylist({\n          playlist: playlist,\n          message: \"Codec switching not supported: \" + switchMessages.join(', ') + \".\",\n          blacklistDuration: Infinity,\n          internal: true\n        });\n        return;\n      }\n    } // TODO: when using the muxer shouldn't we just return\n    // the codecs that the muxer outputs?\n\n\n    return codecs;\n  }\n  /**\n   * Create source buffers and exlude any incompatible renditions.\n   *\n   * @private\n   */\n  ;\n\n  _proto.tryToCreateSourceBuffers_ = function tryToCreateSourceBuffers_() {\n    // media source is not ready yet or sourceBuffers are already\n    // created.\n    if (this.mediaSource.readyState !== 'open' || this.sourceUpdater_.hasCreatedSourceBuffers()) {\n      return;\n    }\n\n    if (!this.areMediaTypesKnown_()) {\n      return;\n    }\n\n    var codecs = this.getCodecsOrExclude_(); // no codecs means that the playlist was excluded\n\n    if (!codecs) {\n      return;\n    }\n\n    this.sourceUpdater_.createSourceBuffers(codecs);\n    var codecString = [codecs.video, codecs.audio].filter(Boolean).join(',');\n    this.excludeIncompatibleVariants_(codecString);\n  }\n  /**\n   * Excludes playlists with codecs that are unsupported by the muxer and browser.\n   */\n  ;\n\n  _proto.excludeUnsupportedVariants_ = function excludeUnsupportedVariants_() {\n    var _this10 = this;\n\n    var playlists = this.master().playlists;\n    var ids = []; // TODO: why don't we have a property to loop through all\n    // playlist? Why did we ever mix indexes and keys?\n\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n\n      if (ids.indexOf(variant.id) !== -1) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var codecs = codecsForPlaylist(_this10.master, variant);\n      var unsupported = [];\n\n      if (codecs.audio && !muxerSupportsCodec(codecs.audio) && !browserSupportsCodec(codecs.audio)) {\n        unsupported.push(\"audio codec \" + codecs.audio);\n      }\n\n      if (codecs.video && !muxerSupportsCodec(codecs.video) && !browserSupportsCodec(codecs.video)) {\n        unsupported.push(\"video codec \" + codecs.video);\n      }\n\n      if (codecs.text && codecs.text === 'stpp.ttml.im1t') {\n        unsupported.push(\"text codec \" + codecs.text);\n      }\n\n      if (unsupported.length) {\n        variant.excludeUntil = Infinity;\n\n        _this10.logger_(\"excluding \" + variant.id + \" for unsupported: \" + unsupported.join(', '));\n      }\n    });\n  }\n  /**\n   * Blacklist playlists that are known to be codec or\n   * stream-incompatible with the SourceBuffer configuration. For\n   * instance, Media Source Extensions would cause the video element to\n   * stall waiting for video data if you switched from a variant with\n   * video and audio to an audio-only one.\n   *\n   * @param {Object} media a media playlist compatible with the current\n   * set of SourceBuffers. Variants in the current master playlist that\n   * do not appear to have compatible codec or stream configurations\n   * will be excluded from the default playlist selection algorithm\n   * indefinitely.\n   * @private\n   */\n  ;\n\n  _proto.excludeIncompatibleVariants_ = function excludeIncompatibleVariants_(codecString) {\n    var _this11 = this;\n\n    var ids = [];\n    var playlists = this.master().playlists;\n    var codecs = unwrapCodecList(parseCodecs(codecString));\n    var codecCount_ = codecCount(codecs);\n    var videoDetails = codecs.video && parseCodecs(codecs.video)[0] || null;\n    var audioDetails = codecs.audio && parseCodecs(codecs.audio)[0] || null;\n    Object.keys(playlists).forEach(function (key) {\n      var variant = playlists[key]; // check if we already processed this playlist.\n      // or it if it is already excluded forever.\n\n      if (ids.indexOf(variant.id) !== -1 || variant.excludeUntil === Infinity) {\n        return;\n      }\n\n      ids.push(variant.id);\n      var blacklistReasons = []; // get codecs from the playlist for this variant\n\n      var variantCodecs = codecsForPlaylist(_this11.masterPlaylistLoader_.master, variant);\n      var variantCodecCount = codecCount(variantCodecs); // if no codecs are listed, we cannot determine that this\n      // variant is incompatible. Wait for mux.js to probe\n\n      if (!variantCodecs.audio && !variantCodecs.video) {\n        return;\n      } // TODO: we can support this by removing the\n      // old media source and creating a new one, but it will take some work.\n      // The number of streams cannot change\n\n\n      if (variantCodecCount !== codecCount_) {\n        blacklistReasons.push(\"codec count \\\"\" + variantCodecCount + \"\\\" !== \\\"\" + codecCount_ + \"\\\"\");\n      } // only exclude playlists by codec change, if codecs cannot switch\n      // during playback.\n\n\n      if (!_this11.sourceUpdater_.canChangeType()) {\n        var variantVideoDetails = variantCodecs.video && parseCodecs(variantCodecs.video)[0] || null;\n        var variantAudioDetails = variantCodecs.audio && parseCodecs(variantCodecs.audio)[0] || null; // the video codec cannot change\n\n        if (variantVideoDetails && videoDetails && variantVideoDetails.type.toLowerCase() !== videoDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"video codec \\\"\" + variantVideoDetails.type + \"\\\" !== \\\"\" + videoDetails.type + \"\\\"\");\n        } // the audio codec cannot change\n\n\n        if (variantAudioDetails && audioDetails && variantAudioDetails.type.toLowerCase() !== audioDetails.type.toLowerCase()) {\n          blacklistReasons.push(\"audio codec \\\"\" + variantAudioDetails.type + \"\\\" !== \\\"\" + audioDetails.type + \"\\\"\");\n        }\n      }\n\n      if (blacklistReasons.length) {\n        variant.excludeUntil = Infinity;\n\n        _this11.logger_(\"blacklisting \" + variant.id + \": \" + blacklistReasons.join(' && '));\n      }\n    });\n  };\n\n  _proto.updateAdCues_ = function updateAdCues_(media) {\n    var offset = 0;\n    var seekable = this.seekable();\n\n    if (seekable.length) {\n      offset = seekable.start(0);\n    }\n\n    updateAdCues(media, this.cueTagsTrack_, offset);\n  }\n  /**\n   * Calculates the desired forward buffer length based on current time\n   *\n   * @return {number} Desired forward buffer length in seconds\n   */\n  ;\n\n  _proto.goalBufferLength = function goalBufferLength() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.GOAL_BUFFER_LENGTH;\n    var rate = Config.GOAL_BUFFER_LENGTH_RATE;\n    var max = Math.max(initial, Config.MAX_GOAL_BUFFER_LENGTH);\n    return Math.min(initial + currentTime * rate, max);\n  }\n  /**\n   * Calculates the desired buffer low water line based on current time\n   *\n   * @return {number} Desired buffer low water line in seconds\n   */\n  ;\n\n  _proto.bufferLowWaterLine = function bufferLowWaterLine() {\n    var currentTime = this.tech_.currentTime();\n    var initial = Config.BUFFER_LOW_WATER_LINE;\n    var rate = Config.BUFFER_LOW_WATER_LINE_RATE;\n    var max = Math.max(initial, Config.MAX_BUFFER_LOW_WATER_LINE);\n    var newMax = Math.max(initial, Config.EXPERIMENTAL_MAX_BUFFER_LOW_WATER_LINE);\n    return Math.min(initial + currentTime * rate, this.experimentalBufferBasedABR ? newMax : max);\n  };\n\n  _proto.bufferHighWaterLine = function bufferHighWaterLine() {\n    return Config.BUFFER_HIGH_WATER_LINE;\n  };\n\n  return MasterPlaylistController;\n}(videojs.EventTarget);\n/**\n * Returns a function that acts as the Enable/disable playlist function.\n *\n * @param {PlaylistLoader} loader - The master playlist loader\n * @param {string} playlistID - id of the playlist\n * @param {Function} changePlaylistFn - A function to be called after a\n * playlist's enabled-state has been changed. Will NOT be called if a\n * playlist's enabled-state is unchanged\n * @param {boolean=} enable - Value to set the playlist enabled-state to\n * or if undefined returns the current enabled-state for the playlist\n * @return {Function} Function for setting/getting enabled\n */\n\n\nvar enableFunction = function enableFunction(loader, playlistID, changePlaylistFn) {\n  return function (enable) {\n    var playlist = loader.master.playlists[playlistID];\n    var incompatible = isIncompatible(playlist);\n    var currentlyEnabled = isEnabled(playlist);\n\n    if (typeof enable === 'undefined') {\n      return currentlyEnabled;\n    }\n\n    if (enable) {\n      delete playlist.disabled;\n    } else {\n      playlist.disabled = true;\n    }\n\n    if (enable !== currentlyEnabled && !incompatible) {\n      // Ensure the outside world knows about our changes\n      changePlaylistFn();\n\n      if (enable) {\n        loader.trigger('renditionenabled');\n      } else {\n        loader.trigger('renditiondisabled');\n      }\n    }\n\n    return enable;\n  };\n};\n/**\n * The representation object encapsulates the publicly visible information\n * in a media playlist along with a setter/getter-type function (enabled)\n * for changing the enabled-state of a particular playlist entry\n *\n * @class Representation\n */\n\n\nvar Representation = function Representation(vhsHandler, playlist, id) {\n  var mpc = vhsHandler.masterPlaylistController_,\n      smoothQualityChange = vhsHandler.options_.smoothQualityChange; // Get a reference to a bound version of the quality change function\n\n  var changeType = smoothQualityChange ? 'smooth' : 'fast';\n  var qualityChangeFunction = mpc[changeType + \"QualityChange_\"].bind(mpc); // some playlist attributes are optional\n\n  if (playlist.attributes) {\n    var resolution = playlist.attributes.RESOLUTION;\n    this.width = resolution && resolution.width;\n    this.height = resolution && resolution.height;\n    this.bandwidth = playlist.attributes.BANDWIDTH;\n    this.frameRate = playlist.attributes['FRAME-RATE'];\n  }\n\n  this.codecs = codecsForPlaylist(mpc.master(), playlist);\n  this.playlist = playlist; // The id is simply the ordinality of the media playlist\n  // within the master playlist\n\n  this.id = id; // Partially-apply the enableFunction to create a playlist-\n  // specific variant\n\n  this.enabled = enableFunction(vhsHandler.playlists, playlist.id, qualityChangeFunction);\n};\n/**\n * A mixin function that adds the `representations` api to an instance\n * of the VhsHandler class\n *\n * @param {VhsHandler} vhsHandler - An instance of VhsHandler to add the\n * representation API into\n */\n\n\nvar renditionSelectionMixin = function renditionSelectionMixin(vhsHandler) {\n  // Add a single API-specific function to the VhsHandler instance\n  vhsHandler.representations = function () {\n    var master = vhsHandler.masterPlaylistController_.master();\n    var playlists = isAudioOnly(master) ? vhsHandler.masterPlaylistController_.getAudioTrackPlaylists_() : master.playlists;\n\n    if (!playlists) {\n      return [];\n    }\n\n    return playlists.filter(function (media) {\n      return !isIncompatible(media);\n    }).map(function (e, i) {\n      return new Representation(vhsHandler, e, e.id);\n    });\n  };\n};\n/**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n\n\nvar timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n/**\n * @class PlaybackWatcher\n */\n\nvar PlaybackWatcher = /*#__PURE__*/function () {\n  /**\n   * Represents an PlaybackWatcher object.\n   *\n   * @class\n   * @param {Object} options an object that includes the tech and settings\n   */\n  function PlaybackWatcher(options) {\n    var _this = this;\n\n    this.masterPlaylistController_ = options.masterPlaylistController;\n    this.tech_ = options.tech;\n    this.seekable = options.seekable;\n    this.allowSeeksWithinUnsafeLiveWindow = options.allowSeeksWithinUnsafeLiveWindow;\n    this.liveRangeSafeTimeDelta = options.liveRangeSafeTimeDelta;\n    this.media = options.media;\n    this.consecutiveUpdates = 0;\n    this.lastRecordedTime = null;\n    this.timer_ = null;\n    this.checkCurrentTimeTimeout_ = null;\n    this.logger_ = logger('PlaybackWatcher');\n    this.logger_('initialize');\n\n    var playHandler = function playHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var canPlayHandler = function canPlayHandler() {\n      return _this.monitorCurrentTime_();\n    };\n\n    var waitingHandler = function waitingHandler() {\n      return _this.techWaiting_();\n    };\n\n    var cancelTimerHandler = function cancelTimerHandler() {\n      return _this.cancelTimer_();\n    };\n\n    var mpc = this.masterPlaylistController_;\n    var loaderTypes = ['main', 'subtitle', 'audio'];\n    var loaderChecks = {};\n    loaderTypes.forEach(function (type) {\n      loaderChecks[type] = {\n        reset: function reset() {\n          return _this.resetSegmentDownloads_(type);\n        },\n        updateend: function updateend() {\n          return _this.checkSegmentDownloads_(type);\n        }\n      };\n      mpc[type + \"SegmentLoader_\"].on('appendsdone', loaderChecks[type].updateend); // If a rendition switch happens during a playback stall where the buffer\n      // isn't changing we want to reset. We cannot assume that the new rendition\n      // will also be stalled, until after new appends.\n\n      mpc[type + \"SegmentLoader_\"].on('playlistupdate', loaderChecks[type].reset); // Playback stalls should not be detected right after seeking.\n      // This prevents one segment playlists (single vtt or single segment content)\n      // from being detected as stalling. As the buffer will not change in those cases, since\n      // the buffer is the entire video duration.\n\n      _this.tech_.on(['seeked', 'seeking'], loaderChecks[type].reset);\n    });\n    /**\n     * We check if a seek was into a gap through the following steps:\n     * 1. We get a seeking event and we do not get a seeked event. This means that\n     *    a seek was attempted but not completed.\n     * 2. We run `fixesBadSeeks_` on segment loader appends. This means that we already\n     *    removed everything from our buffer and appended a segment, and should be ready\n     *    to check for gaps.\n     */\n\n    var setSeekingHandlers = function setSeekingHandlers(fn) {\n      ['main', 'audio'].forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"][fn]('appended', _this.seekingAppendCheck_);\n      });\n    };\n\n    this.seekingAppendCheck_ = function () {\n      if (_this.fixesBadSeeks_()) {\n        _this.consecutiveUpdates = 0;\n        _this.lastRecordedTime = _this.tech_.currentTime();\n        setSeekingHandlers('off');\n      }\n    };\n\n    this.clearSeekingAppendCheck_ = function () {\n      return setSeekingHandlers('off');\n    };\n\n    this.watchForBadSeeking_ = function () {\n      _this.clearSeekingAppendCheck_();\n\n      setSeekingHandlers('on');\n    };\n\n    this.tech_.on('seeked', this.clearSeekingAppendCheck_);\n    this.tech_.on('seeking', this.watchForBadSeeking_);\n    this.tech_.on('waiting', waitingHandler);\n    this.tech_.on(timerCancelEvents, cancelTimerHandler);\n    this.tech_.on('canplay', canPlayHandler);\n    /*\n      An edge case exists that results in gaps not being skipped when they exist at the beginning of a stream. This case\n      is surfaced in one of two ways:\n       1)  The `waiting` event is fired before the player has buffered content, making it impossible\n          to find or skip the gap. The `waiting` event is followed by a `play` event. On first play\n          we can check if playback is stalled due to a gap, and skip the gap if necessary.\n      2)  A source with a gap at the beginning of the stream is loaded programatically while the player\n          is in a playing state. To catch this case, it's important that our one-time play listener is setup\n          even if the player is in a playing state\n    */\n\n    this.tech_.one('play', playHandler); // Define the dispose function to clean up our events\n\n    this.dispose = function () {\n      _this.clearSeekingAppendCheck_();\n\n      _this.logger_('dispose');\n\n      _this.tech_.off('waiting', waitingHandler);\n\n      _this.tech_.off(timerCancelEvents, cancelTimerHandler);\n\n      _this.tech_.off('canplay', canPlayHandler);\n\n      _this.tech_.off('play', playHandler);\n\n      _this.tech_.off('seeking', _this.watchForBadSeeking_);\n\n      _this.tech_.off('seeked', _this.clearSeekingAppendCheck_);\n\n      loaderTypes.forEach(function (type) {\n        mpc[type + \"SegmentLoader_\"].off('appendsdone', loaderChecks[type].updateend);\n        mpc[type + \"SegmentLoader_\"].off('playlistupdate', loaderChecks[type].reset);\n\n        _this.tech_.off(['seeked', 'seeking'], loaderChecks[type].reset);\n      });\n\n      if (_this.checkCurrentTimeTimeout_) {\n        window$1.clearTimeout(_this.checkCurrentTimeTimeout_);\n      }\n\n      _this.cancelTimer_();\n    };\n  }\n  /**\n   * Periodically check current time to see if playback stopped\n   *\n   * @private\n   */\n\n\n  var _proto = PlaybackWatcher.prototype;\n\n  _proto.monitorCurrentTime_ = function monitorCurrentTime_() {\n    this.checkCurrentTime_();\n\n    if (this.checkCurrentTimeTimeout_) {\n      window$1.clearTimeout(this.checkCurrentTimeTimeout_);\n    } // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n\n\n    this.checkCurrentTimeTimeout_ = window$1.setTimeout(this.monitorCurrentTime_.bind(this), 250);\n  }\n  /**\n   * Reset stalled download stats for a specific type of loader\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#playlistupdate\n   * @listens Tech#seeking\n   * @listens Tech#seeked\n   */\n  ;\n\n  _proto.resetSegmentDownloads_ = function resetSegmentDownloads_(type) {\n    var loader = this.masterPlaylistController_[type + \"SegmentLoader_\"];\n\n    if (this[type + \"StalledDownloads_\"] > 0) {\n      this.logger_(\"resetting possible stalled download count for \" + type + \" loader\");\n    }\n\n    this[type + \"StalledDownloads_\"] = 0;\n    this[type + \"Buffered_\"] = loader.buffered_();\n  }\n  /**\n   * Checks on every segment `appendsdone` to see\n   * if segment appends are making progress. If they are not\n   * and we are still downloading bytes. We blacklist the playlist.\n   *\n   * @param {string} type\n   *        The segment loader type to check.\n   *\n   * @listens SegmentLoader#appendsdone\n   */\n  ;\n\n  _proto.checkSegmentDownloads_ = function checkSegmentDownloads_(type) {\n    var mpc = this.masterPlaylistController_;\n    var loader = mpc[type + \"SegmentLoader_\"];\n    var buffered = loader.buffered_();\n    var isBufferedDifferent = isRangeDifferent(this[type + \"Buffered_\"], buffered);\n    this[type + \"Buffered_\"] = buffered; // if another watcher is going to fix the issue or\n    // the buffered value for this loader changed\n    // appends are working\n\n    if (isBufferedDifferent) {\n      this.resetSegmentDownloads_(type);\n      return;\n    }\n\n    this[type + \"StalledDownloads_\"]++;\n    this.logger_(\"found #\" + this[type + \"StalledDownloads_\"] + \" \" + type + \" appends that did not increase buffer (possible stalled download)\", {\n      playlistId: loader.playlist_ && loader.playlist_.id,\n      buffered: timeRangesToArray(buffered)\n    }); // after 10 possibly stalled appends with no reset, exclude\n\n    if (this[type + \"StalledDownloads_\"] < 10) {\n      return;\n    }\n\n    this.logger_(type + \" loader stalled download exclusion\");\n    this.resetSegmentDownloads_(type);\n    this.tech_.trigger({\n      type: 'usage',\n      name: \"vhs-\" + type + \"-download-exclusion\"\n    });\n\n    if (type === 'subtitle') {\n      return;\n    } // TODO: should we exclude audio tracks rather than main tracks\n    // when type is audio?\n\n\n    mpc.blacklistCurrentPlaylist({\n      message: \"Excessive \" + type + \" segment downloading detected.\"\n    }, Infinity);\n  }\n  /**\n   * The purpose of this function is to emulate the \"waiting\" event on\n   * browsers that do not emit it when they are waiting for more\n   * data to continue playback\n   *\n   * @private\n   */\n  ;\n\n  _proto.checkCurrentTime_ = function checkCurrentTime_() {\n    if (this.tech_.paused() || this.tech_.seeking()) {\n      return;\n    }\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n\n    if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n      // If current time is at the end of the final buffered region, then any playback\n      // stall is most likely caused by buffering in a low bandwidth environment. The tech\n      // should fire a `waiting` event in this scenario, but due to browser and tech\n      // inconsistencies. Calling `techWaiting_` here allows us to simulate\n      // responding to a native `waiting` event when the tech fails to emit one.\n      return this.techWaiting_();\n    }\n\n    if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n      this.waiting_();\n    } else if (currentTime === this.lastRecordedTime) {\n      this.consecutiveUpdates++;\n    } else {\n      this.consecutiveUpdates = 0;\n      this.lastRecordedTime = currentTime;\n    }\n  }\n  /**\n   * Cancels any pending timers and resets the 'timeupdate' mechanism\n   * designed to detect that we are stalled\n   *\n   * @private\n   */\n  ;\n\n  _proto.cancelTimer_ = function cancelTimer_() {\n    this.consecutiveUpdates = 0;\n\n    if (this.timer_) {\n      this.logger_('cancelTimer_');\n      clearTimeout(this.timer_);\n    }\n\n    this.timer_ = null;\n  }\n  /**\n   * Fixes situations where there's a bad seek\n   *\n   * @return {boolean} whether an action was taken to fix the seek\n   * @private\n   */\n  ;\n\n  _proto.fixesBadSeeks_ = function fixesBadSeeks_() {\n    var seeking = this.tech_.seeking();\n\n    if (!seeking) {\n      return false;\n    } // TODO: It's possible that these seekable checks should be moved out of this function\n    // and into a function that runs on seekablechange. It's also possible that we only need\n    // afterSeekableWindow as the buffered check at the bottom is good enough to handle before\n    // seekable range.\n\n\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n    var isAfterSeekableRange = this.afterSeekableWindow_(seekable, currentTime, this.media(), this.allowSeeksWithinUnsafeLiveWindow);\n    var seekTo;\n\n    if (isAfterSeekableRange) {\n      var seekableEnd = seekable.end(seekable.length - 1); // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n\n      seekTo = seekableEnd;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var seekableStart = seekable.start(0); // sync to the beginning of the live window\n      // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n\n      seekTo = seekableStart + ( // if the playlist is too short and the seekable range is an exact time (can\n      // happen in live with a 3 segment playlist), then don't use a time delta\n      seekableStart === seekable.end(0) ? 0 : SAFE_TIME_DELTA);\n    }\n\n    if (typeof seekTo !== 'undefined') {\n      this.logger_(\"Trying to seek outside of seekable at time \" + currentTime + \" with \" + (\"seekable range \" + printableRange(seekable) + \". Seeking to \") + (seekTo + \".\"));\n      this.tech_.setCurrentTime(seekTo);\n      return true;\n    }\n\n    var sourceUpdater = this.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var audioBuffered = sourceUpdater.audioBuffer ? sourceUpdater.audioBuffered() : null;\n    var videoBuffered = sourceUpdater.videoBuffer ? sourceUpdater.videoBuffered() : null;\n    var media = this.media(); // verify that at least two segment durations or one part duration have been\n    // appended before checking for a gap.\n\n    var minAppendedDuration = media.partTargetDuration ? media.partTargetDuration : (media.targetDuration - TIME_FUDGE_FACTOR) * 2; // verify that at least two segment durations have been\n    // appended before checking for a gap.\n\n    var bufferedToCheck = [audioBuffered, videoBuffered];\n\n    for (var i = 0; i < bufferedToCheck.length; i++) {\n      // skip null buffered\n      if (!bufferedToCheck[i]) {\n        continue;\n      }\n\n      var timeAhead = timeAheadOf(bufferedToCheck[i], currentTime); // if we are less than two video/audio segment durations or one part\n      // duration behind we haven't appended enough to call this a bad seek.\n\n      if (timeAhead < minAppendedDuration) {\n        return false;\n      }\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // we have appended enough content, but we don't have anything buffered\n    // to seek over the gap\n\n    if (nextRange.length === 0) {\n      return false;\n    }\n\n    seekTo = nextRange.start(0) + SAFE_TIME_DELTA;\n    this.logger_(\"Buffered region starts (\" + nextRange.start(0) + \") \" + (\" just beyond seek point (\" + currentTime + \"). Seeking to \" + seekTo + \".\"));\n    this.tech_.setCurrentTime(seekTo);\n    return true;\n  }\n  /**\n   * Handler for situations when we determine the player is waiting.\n   *\n   * @private\n   */\n  ;\n\n  _proto.waiting_ = function waiting_() {\n    if (this.techWaiting_()) {\n      return;\n    } // All tech waiting checks failed. Use last resort correction\n\n\n    var currentTime = this.tech_.currentTime();\n    var buffered = this.tech_.buffered();\n    var currentRange = findRange(buffered, currentTime); // Sometimes the player can stall for unknown reasons within a contiguous buffered\n    // region with no indication that anything is amiss (seen in Firefox). Seeking to\n    // currentTime is usually enough to kickstart the player. This checks that the player\n    // is currently within a buffered region before attempting a corrective seek.\n    // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n    // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n    // make sure there is ~3 seconds of forward buffer before taking any corrective action\n    // to avoid triggering an `unknownwaiting` event when the network is slow.\n\n    if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime);\n      this.logger_(\"Stopped at \" + currentTime + \" while inside a buffered region \" + (\"[\" + currentRange.start(0) + \" -> \" + currentRange.end(0) + \"]. Attempting to resume \") + 'playback by seeking to the current time.'); // unknown waiting corrections may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-unknown-waiting'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-unknown-waiting'\n      });\n      return;\n    }\n  }\n  /**\n   * Handler for situations when the tech fires a `waiting` event\n   *\n   * @return {boolean}\n   *         True if an action (or none) was needed to correct the waiting. False if no\n   *         checks passed\n   * @private\n   */\n  ;\n\n  _proto.techWaiting_ = function techWaiting_() {\n    var seekable = this.seekable();\n    var currentTime = this.tech_.currentTime();\n\n    if (this.tech_.seeking() || this.timer_ !== null) {\n      // Tech is seeking or already waiting on another action, no action needed\n      return true;\n    }\n\n    if (this.beforeSeekableWindow_(seekable, currentTime)) {\n      var livePoint = seekable.end(seekable.length - 1);\n      this.logger_(\"Fell out of live window at time \" + currentTime + \". Seeking to \" + (\"live point (seekable end) \" + livePoint));\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(livePoint); // live window resyncs may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-live-resync'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-live-resync'\n      });\n      return true;\n    }\n\n    var sourceUpdater = this.tech_.vhs.masterPlaylistController_.sourceUpdater_;\n    var buffered = this.tech_.buffered();\n    var videoUnderflow = this.videoUnderflow_({\n      audioBuffered: sourceUpdater.audioBuffered(),\n      videoBuffered: sourceUpdater.videoBuffered(),\n      currentTime: currentTime\n    });\n\n    if (videoUnderflow) {\n      // Even though the video underflowed and was stuck in a gap, the audio overplayed\n      // the gap, leading currentTime into a buffered range. Seeking to currentTime\n      // allows the video to catch up to the audio position without losing any audio\n      // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n      this.cancelTimer_();\n      this.tech_.setCurrentTime(currentTime); // video underflow may be useful for monitoring QoS\n\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'vhs-video-underflow'\n      });\n      this.tech_.trigger({\n        type: 'usage',\n        name: 'hls-video-underflow'\n      });\n      return true;\n    }\n\n    var nextRange = findNextRange(buffered, currentTime); // check for gap\n\n    if (nextRange.length > 0) {\n      var difference = nextRange.start(0) - currentTime;\n      this.logger_(\"Stopped at \" + currentTime + \", setting timer for \" + difference + \", seeking \" + (\"to \" + nextRange.start(0)));\n      this.cancelTimer_();\n      this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);\n      return true;\n    } // All checks failed. Returning false to indicate failure to correct waiting\n\n\n    return false;\n  };\n\n  _proto.afterSeekableWindow_ = function afterSeekableWindow_(seekable, currentTime, playlist, allowSeeksWithinUnsafeLiveWindow) {\n    if (allowSeeksWithinUnsafeLiveWindow === void 0) {\n      allowSeeksWithinUnsafeLiveWindow = false;\n    }\n\n    if (!seekable.length) {\n      // we can't make a solid case if there's no seekable, default to false\n      return false;\n    }\n\n    var allowedEnd = seekable.end(seekable.length - 1) + SAFE_TIME_DELTA;\n    var isLive = !playlist.endList;\n\n    if (isLive && allowSeeksWithinUnsafeLiveWindow) {\n      allowedEnd = seekable.end(seekable.length - 1) + playlist.targetDuration * 3;\n    }\n\n    if (currentTime > allowedEnd) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.beforeSeekableWindow_ = function beforeSeekableWindow_(seekable, currentTime) {\n    if (seekable.length && // can't fall before 0 and 0 seekable start identifies VOD stream\n    seekable.start(0) > 0 && currentTime < seekable.start(0) - this.liveRangeSafeTimeDelta) {\n      return true;\n    }\n\n    return false;\n  };\n\n  _proto.videoUnderflow_ = function videoUnderflow_(_ref) {\n    var videoBuffered = _ref.videoBuffered,\n        audioBuffered = _ref.audioBuffered,\n        currentTime = _ref.currentTime; // audio only content will not have video underflow :)\n\n    if (!videoBuffered) {\n      return;\n    }\n\n    var gap; // find a gap in demuxed content.\n\n    if (videoBuffered.length && audioBuffered.length) {\n      // in Chrome audio will continue to play for ~3s when we run out of video\n      // so we have to check that the video buffer did have some buffer in the\n      // past.\n      var lastVideoRange = findRange(videoBuffered, currentTime - 3);\n      var videoRange = findRange(videoBuffered, currentTime);\n      var audioRange = findRange(audioBuffered, currentTime);\n\n      if (audioRange.length && !videoRange.length && lastVideoRange.length) {\n        gap = {\n          start: lastVideoRange.end(0),\n          end: audioRange.end(0)\n        };\n      } // find a gap in muxed content.\n\n    } else {\n      var nextRange = findNextRange(videoBuffered, currentTime); // Even if there is no available next range, there is still a possibility we are\n      // stuck in a gap due to video underflow.\n\n      if (!nextRange.length) {\n        gap = this.gapFromVideoUnderflow_(videoBuffered, currentTime);\n      }\n    }\n\n    if (gap) {\n      this.logger_(\"Encountered a gap in video from \" + gap.start + \" to \" + gap.end + \". \" + (\"Seeking to current time \" + currentTime));\n      return true;\n    }\n\n    return false;\n  }\n  /**\n   * Timer callback. If playback still has not proceeded, then we seek\n   * to the start of the next buffered region.\n   *\n   * @private\n   */\n  ;\n\n  _proto.skipTheGap_ = function skipTheGap_(scheduledCurrentTime) {\n    var buffered = this.tech_.buffered();\n    var currentTime = this.tech_.currentTime();\n    var nextRange = findNextRange(buffered, currentTime);\n    this.cancelTimer_();\n\n    if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n      return;\n    }\n\n    this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0)); // only seek if we still have not played\n\n    this.tech_.setCurrentTime(nextRange.start(0) + TIME_FUDGE_FACTOR);\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'vhs-gap-skip'\n    });\n    this.tech_.trigger({\n      type: 'usage',\n      name: 'hls-gap-skip'\n    });\n  };\n\n  _proto.gapFromVideoUnderflow_ = function gapFromVideoUnderflow_(buffered, currentTime) {\n    // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n    // playing for ~3 seconds after the video gap starts. This is done to account for\n    // video buffer underflow/underrun (note that this is not done when there is audio\n    // buffer underflow/underrun -- in that case the video will stop as soon as it\n    // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n    // video stalls). The player's time will reflect the playthrough of audio, so the\n    // time will appear as if we are in a buffered region, even if we are stuck in a\n    // \"gap.\"\n    //\n    // Example:\n    // video buffer:   0 => 10.1, 10.2 => 20\n    // audio buffer:   0 => 20\n    // overall buffer: 0 => 10.1, 10.2 => 20\n    // current time: 13\n    //\n    // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n    // however, the audio continued playing until it reached ~3 seconds past the gap\n    // (13 seconds), at which point it stops as well. Since current time is past the\n    // gap, findNextRange will return no ranges.\n    //\n    // To check for this issue, we see if there is a gap that starts somewhere within\n    // a 3 second range (3 seconds +/- 1 second) back from our current time.\n    var gaps = findGaps(buffered);\n\n    for (var i = 0; i < gaps.length; i++) {\n      var start = gaps.start(i);\n      var end = gaps.end(i); // gap is starts no more than 4 seconds back\n\n      if (currentTime - start < 4 && currentTime - start > 2) {\n        return {\n          start: start,\n          end: end\n        };\n      }\n    }\n\n    return null;\n  };\n\n  return PlaybackWatcher;\n}();\n\nvar defaultOptions = {\n  errorInterval: 30,\n  getSource: function getSource(next) {\n    var tech = this.tech({\n      IWillNotUseThisInPlugins: true\n    });\n    var sourceObj = tech.currentSource_ || this.currentSource();\n    return next(sourceObj);\n  }\n};\n/**\n * Main entry point for the plugin\n *\n * @param {Player} player a reference to a videojs Player instance\n * @param {Object} [options] an object with plugin options\n * @private\n */\n\nvar initPlugin = function initPlugin(player, options) {\n  var lastCalled = 0;\n  var seekTo = 0;\n  var localOptions = videojs.mergeOptions(defaultOptions, options);\n  player.ready(function () {\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload-initialized'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload-initialized'\n    });\n  });\n  /**\n   * Player modifications to perform that must wait until `loadedmetadata`\n   * has been triggered\n   *\n   * @private\n   */\n\n  var loadedMetadataHandler = function loadedMetadataHandler() {\n    if (seekTo) {\n      player.currentTime(seekTo);\n    }\n  };\n  /**\n   * Set the source on the player element, play, and seek if necessary\n   *\n   * @param {Object} sourceObj An object specifying the source url and mime-type to play\n   * @private\n   */\n\n\n  var setSource = function setSource(sourceObj) {\n    if (sourceObj === null || sourceObj === undefined) {\n      return;\n    }\n\n    seekTo = player.duration() !== Infinity && player.currentTime() || 0;\n    player.one('loadedmetadata', loadedMetadataHandler);\n    player.src(sourceObj);\n    player.trigger({\n      type: 'usage',\n      name: 'vhs-error-reload'\n    });\n    player.trigger({\n      type: 'usage',\n      name: 'hls-error-reload'\n    });\n    player.play();\n  };\n  /**\n   * Attempt to get a source from either the built-in getSource function\n   * or a custom function provided via the options\n   *\n   * @private\n   */\n\n\n  var errorHandler = function errorHandler() {\n    // Do not attempt to reload the source if a source-reload occurred before\n    // 'errorInterval' time has elapsed since the last source-reload\n    if (Date.now() - lastCalled < localOptions.errorInterval * 1000) {\n      player.trigger({\n        type: 'usage',\n        name: 'vhs-error-reload-canceled'\n      });\n      player.trigger({\n        type: 'usage',\n        name: 'hls-error-reload-canceled'\n      });\n      return;\n    }\n\n    if (!localOptions.getSource || typeof localOptions.getSource !== 'function') {\n      videojs.log.error('ERROR: reloadSourceOnError - The option getSource must be a function!');\n      return;\n    }\n\n    lastCalled = Date.now();\n    return localOptions.getSource.call(player, setSource);\n  };\n  /**\n   * Unbind any event handlers that were bound by the plugin\n   *\n   * @private\n   */\n\n\n  var cleanupEvents = function cleanupEvents() {\n    player.off('loadedmetadata', loadedMetadataHandler);\n    player.off('error', errorHandler);\n    player.off('dispose', cleanupEvents);\n  };\n  /**\n   * Cleanup before re-initializing the plugin\n   *\n   * @param {Object} [newOptions] an object with plugin options\n   * @private\n   */\n\n\n  var reinitPlugin = function reinitPlugin(newOptions) {\n    cleanupEvents();\n    initPlugin(player, newOptions);\n  };\n\n  player.on('error', errorHandler);\n  player.on('dispose', cleanupEvents); // Overwrite the plugin function so that we can correctly cleanup before\n  // initializing the plugin\n\n  player.reloadSourceOnError = reinitPlugin;\n};\n/**\n * Reload the source when an error is detected as long as there\n * wasn't an error previously within the last 30 seconds\n *\n * @param {Object} [options] an object with plugin options\n */\n\n\nvar reloadSourceOnError = function reloadSourceOnError(options) {\n  initPlugin(this, options);\n};\n\nvar version$4 = \"2.16.2\";\nvar version$3 = \"6.0.1\";\nvar version$2 = \"0.22.1\";\nvar version$1 = \"4.8.0\";\nvar version = \"3.1.3\";\nvar Vhs = {\n  PlaylistLoader: PlaylistLoader,\n  Playlist: Playlist,\n  utils: utils,\n  STANDARD_PLAYLIST_SELECTOR: lastBandwidthSelector,\n  INITIAL_PLAYLIST_SELECTOR: lowestBitrateCompatibleVariantSelector,\n  lastBandwidthSelector: lastBandwidthSelector,\n  movingAverageBandwidthSelector: movingAverageBandwidthSelector,\n  comparePlaylistBandwidth: comparePlaylistBandwidth,\n  comparePlaylistResolution: comparePlaylistResolution,\n  xhr: xhrFactory()\n}; // Define getter/setters for config properties\n\nObject.keys(Config).forEach(function (prop) {\n  Object.defineProperty(Vhs, prop, {\n    get: function get() {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n      return Config[prop];\n    },\n    set: function set(value) {\n      videojs.log.warn(\"using Vhs.\" + prop + \" is UNSAFE be sure you know what you are doing\");\n\n      if (typeof value !== 'number' || value < 0) {\n        videojs.log.warn(\"value of Vhs.\" + prop + \" must be greater than or equal to 0\");\n        return;\n      }\n\n      Config[prop] = value;\n    }\n  });\n});\nvar LOCAL_STORAGE_KEY = 'videojs-vhs';\n/**\n * Updates the selectedIndex of the QualityLevelList when a mediachange happens in vhs.\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to update.\n * @param {PlaylistLoader} playlistLoader PlaylistLoader containing the new media info.\n * @function handleVhsMediaChange\n */\n\nvar handleVhsMediaChange = function handleVhsMediaChange(qualityLevels, playlistLoader) {\n  var newPlaylist = playlistLoader.media();\n  var selectedIndex = -1;\n\n  for (var i = 0; i < qualityLevels.length; i++) {\n    if (qualityLevels[i].id === newPlaylist.id) {\n      selectedIndex = i;\n      break;\n    }\n  }\n\n  qualityLevels.selectedIndex_ = selectedIndex;\n  qualityLevels.trigger({\n    selectedIndex: selectedIndex,\n    type: 'change'\n  });\n};\n/**\n * Adds quality levels to list once playlist metadata is available\n *\n * @param {QualityLevelList} qualityLevels The QualityLevelList to attach events to.\n * @param {Object} vhs Vhs object to listen to for media events.\n * @function handleVhsLoadedMetadata\n */\n\n\nvar handleVhsLoadedMetadata = function handleVhsLoadedMetadata(qualityLevels, vhs) {\n  vhs.representations().forEach(function (rep) {\n    qualityLevels.addQualityLevel(rep);\n  });\n  handleVhsMediaChange(qualityLevels, vhs.playlists);\n}; // HLS is a source handler, not a tech. Make sure attempts to use it\n// as one do not cause exceptions.\n\n\nVhs.canPlaySource = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar emeKeySystems = function emeKeySystems(keySystemOptions, mainPlaylist, audioPlaylist) {\n  if (!keySystemOptions) {\n    return keySystemOptions;\n  }\n\n  var codecs = {};\n\n  if (mainPlaylist && mainPlaylist.attributes && mainPlaylist.attributes.CODECS) {\n    codecs = unwrapCodecList(parseCodecs(mainPlaylist.attributes.CODECS));\n  }\n\n  if (audioPlaylist && audioPlaylist.attributes && audioPlaylist.attributes.CODECS) {\n    codecs.audio = audioPlaylist.attributes.CODECS;\n  }\n\n  var videoContentType = getMimeForCodec(codecs.video);\n  var audioContentType = getMimeForCodec(codecs.audio); // upsert the content types based on the selected playlist\n\n  var keySystemContentTypes = {};\n\n  for (var keySystem in keySystemOptions) {\n    keySystemContentTypes[keySystem] = {};\n\n    if (audioContentType) {\n      keySystemContentTypes[keySystem].audioContentType = audioContentType;\n    }\n\n    if (videoContentType) {\n      keySystemContentTypes[keySystem].videoContentType = videoContentType;\n    } // Default to using the video playlist's PSSH even though they may be different, as\n    // videojs-contrib-eme will only accept one in the options.\n    //\n    // This shouldn't be an issue for most cases as early intialization will handle all\n    // unique PSSH values, and if they aren't, then encrypted events should have the\n    // specific information needed for the unique license.\n\n\n    if (mainPlaylist.contentProtection && mainPlaylist.contentProtection[keySystem] && mainPlaylist.contentProtection[keySystem].pssh) {\n      keySystemContentTypes[keySystem].pssh = mainPlaylist.contentProtection[keySystem].pssh;\n    } // videojs-contrib-eme accepts the option of specifying: 'com.some.cdm': 'url'\n    // so we need to prevent overwriting the URL entirely\n\n\n    if (typeof keySystemOptions[keySystem] === 'string') {\n      keySystemContentTypes[keySystem].url = keySystemOptions[keySystem];\n    }\n  }\n\n  return videojs.mergeOptions(keySystemOptions, keySystemContentTypes);\n};\n/**\n * @typedef {Object} KeySystems\n *\n * keySystems configuration for https://github.com/videojs/videojs-contrib-eme\n * Note: not all options are listed here.\n *\n * @property {Uint8Array} [pssh]\n *           Protection System Specific Header\n */\n\n/**\n * Goes through all the playlists and collects an array of KeySystems options objects\n * containing each playlist's keySystems and their pssh values, if available.\n *\n * @param {Object[]} playlists\n *        The playlists to look through\n * @param {string[]} keySystems\n *        The keySystems to collect pssh values for\n *\n * @return {KeySystems[]}\n *         An array of KeySystems objects containing available key systems and their\n *         pssh values\n */\n\n\nvar getAllPsshKeySystemsOptions = function getAllPsshKeySystemsOptions(playlists, keySystems) {\n  return playlists.reduce(function (keySystemsArr, playlist) {\n    if (!playlist.contentProtection) {\n      return keySystemsArr;\n    }\n\n    var keySystemsOptions = keySystems.reduce(function (keySystemsObj, keySystem) {\n      var keySystemOptions = playlist.contentProtection[keySystem];\n\n      if (keySystemOptions && keySystemOptions.pssh) {\n        keySystemsObj[keySystem] = {\n          pssh: keySystemOptions.pssh\n        };\n      }\n\n      return keySystemsObj;\n    }, {});\n\n    if (Object.keys(keySystemsOptions).length) {\n      keySystemsArr.push(keySystemsOptions);\n    }\n\n    return keySystemsArr;\n  }, []);\n};\n/**\n * Returns a promise that waits for the\n * [eme plugin](https://github.com/videojs/videojs-contrib-eme) to create a key session.\n *\n * Works around https://bugs.chromium.org/p/chromium/issues/detail?id=895449 in non-IE11\n * browsers.\n *\n * As per the above ticket, this is particularly important for Chrome, where, if\n * unencrypted content is appended before encrypted content and the key session has not\n * been created, a MEDIA_ERR_DECODE will be thrown once the encrypted content is reached\n * during playback.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n * @param {Object[]} mainPlaylists\n *        The playlists found on the master playlist object\n *\n * @return {Object}\n *         Promise that resolves when the key session has been created\n */\n\n\nvar waitForKeySessionCreation = function waitForKeySessionCreation(_ref) {\n  var player = _ref.player,\n      sourceKeySystems = _ref.sourceKeySystems,\n      audioMedia = _ref.audioMedia,\n      mainPlaylists = _ref.mainPlaylists;\n\n  if (!player.eme.initializeMediaKeys) {\n    return Promise.resolve();\n  } // TODO should all audio PSSH values be initialized for DRM?\n  //\n  // All unique video rendition pssh values are initialized for DRM, but here only\n  // the initial audio playlist license is initialized. In theory, an encrypted\n  // event should be fired if the user switches to an alternative audio playlist\n  // where a license is required, but this case hasn't yet been tested. In addition, there\n  // may be many alternate audio playlists unlikely to be used (e.g., multiple different\n  // languages).\n\n\n  var playlists = audioMedia ? mainPlaylists.concat([audioMedia]) : mainPlaylists;\n  var keySystemsOptionsArr = getAllPsshKeySystemsOptions(playlists, Object.keys(sourceKeySystems));\n  var initializationFinishedPromises = [];\n  var keySessionCreatedPromises = []; // Since PSSH values are interpreted as initData, EME will dedupe any duplicates. The\n  // only place where it should not be deduped is for ms-prefixed APIs, but the early\n  // return for IE11 above, and the existence of modern EME APIs in addition to\n  // ms-prefixed APIs on Edge should prevent this from being a concern.\n  // initializeMediaKeys also won't use the webkit-prefixed APIs.\n\n  keySystemsOptionsArr.forEach(function (keySystemsOptions) {\n    keySessionCreatedPromises.push(new Promise(function (resolve, reject) {\n      player.tech_.one('keysessioncreated', resolve);\n    }));\n    initializationFinishedPromises.push(new Promise(function (resolve, reject) {\n      player.eme.initializeMediaKeys({\n        keySystems: keySystemsOptions\n      }, function (err) {\n        if (err) {\n          reject(err);\n          return;\n        }\n\n        resolve();\n      });\n    }));\n  }); // The reasons Promise.race is chosen over Promise.any:\n  //\n  // * Promise.any is only available in Safari 14+.\n  // * None of these promises are expected to reject. If they do reject, it might be\n  //   better here for the race to surface the rejection, rather than mask it by using\n  //   Promise.any.\n\n  return Promise.race([// If a session was previously created, these will all finish resolving without\n  // creating a new session, otherwise it will take until the end of all license\n  // requests, which is why the key session check is used (to make setup much faster).\n  Promise.all(initializationFinishedPromises), // Once a single session is created, the browser knows DRM will be used.\n  Promise.race(keySessionCreatedPromises)]);\n};\n/**\n * If the [eme](https://github.com/videojs/videojs-contrib-eme) plugin is available, and\n * there are keySystems on the source, sets up source options to prepare the source for\n * eme.\n *\n * @param {Object} player\n *        The player instance\n * @param {Object[]} sourceKeySystems\n *        The key systems options from the player source\n * @param {Object} media\n *        The active media playlist\n * @param {Object} [audioMedia]\n *        The active audio media playlist (optional)\n *\n * @return {boolean}\n *         Whether or not options were configured and EME is available\n */\n\n\nvar setupEmeOptions = function setupEmeOptions(_ref2) {\n  var player = _ref2.player,\n      sourceKeySystems = _ref2.sourceKeySystems,\n      media = _ref2.media,\n      audioMedia = _ref2.audioMedia;\n  var sourceOptions = emeKeySystems(sourceKeySystems, media, audioMedia);\n\n  if (!sourceOptions) {\n    return false;\n  }\n\n  player.currentSource().keySystems = sourceOptions; // eme handles the rest of the setup, so if it is missing\n  // do nothing.\n\n  if (sourceOptions && !player.eme) {\n    videojs.log.warn('DRM encrypted source cannot be decrypted without a DRM plugin');\n    return false;\n  }\n\n  return true;\n};\n\nvar getVhsLocalStorage = function getVhsLocalStorage() {\n  if (!window$1.localStorage) {\n    return null;\n  }\n\n  var storedObject = window$1.localStorage.getItem(LOCAL_STORAGE_KEY);\n\n  if (!storedObject) {\n    return null;\n  }\n\n  try {\n    return JSON.parse(storedObject);\n  } catch (e) {\n    // someone may have tampered with the value\n    return null;\n  }\n};\n\nvar updateVhsLocalStorage = function updateVhsLocalStorage(options) {\n  if (!window$1.localStorage) {\n    return false;\n  }\n\n  var objectToStore = getVhsLocalStorage();\n  objectToStore = objectToStore ? videojs.mergeOptions(objectToStore, options) : options;\n\n  try {\n    window$1.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(objectToStore));\n  } catch (e) {\n    // Throws if storage is full (e.g., always on iOS 5+ Safari private mode, where\n    // storage is set to 0).\n    // https://developer.mozilla.org/en-US/docs/Web/API/Storage/setItem#Exceptions\n    // No need to perform any operation.\n    return false;\n  }\n\n  return objectToStore;\n};\n/**\n * Parses VHS-supported media types from data URIs. See\n * https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs\n * for information on data URIs.\n *\n * @param {string} dataUri\n *        The data URI\n *\n * @return {string|Object}\n *         The parsed object/string, or the original string if no supported media type\n *         was found\n */\n\n\nvar expandDataUri = function expandDataUri(dataUri) {\n  if (dataUri.toLowerCase().indexOf('data:application/vnd.videojs.vhs+json,') === 0) {\n    return JSON.parse(dataUri.substring(dataUri.indexOf(',') + 1));\n  } // no known case for this data URI, return the string as-is\n\n\n  return dataUri;\n};\n/**\n * Whether the browser has built-in HLS support.\n */\n\n\nVhs.supportsNativeHls = function () {\n  if (!document || !document.createElement) {\n    return false;\n  }\n\n  var video = document.createElement('video'); // native HLS is definitely not supported if HTML5 video isn't\n\n  if (!videojs.getTech('Html5').isSupported()) {\n    return false;\n  } // HLS manifests can go by many mime-types\n\n\n  var canPlay = [// Apple santioned\n  'application/vnd.apple.mpegurl', // Apple sanctioned for backwards compatibility\n  'audio/mpegurl', // Very common\n  'audio/x-mpegurl', // Very common\n  'application/x-mpegurl', // Included for completeness\n  'video/x-mpegurl', 'video/mpegurl', 'application/mpegurl'];\n  return canPlay.some(function (canItPlay) {\n    return /maybe|probably/i.test(video.canPlayType(canItPlay));\n  });\n}();\n\nVhs.supportsNativeDash = function () {\n  if (!document || !document.createElement || !videojs.getTech('Html5').isSupported()) {\n    return false;\n  }\n\n  return /maybe|probably/i.test(document.createElement('video').canPlayType('application/dash+xml'));\n}();\n\nVhs.supportsTypeNatively = function (type) {\n  if (type === 'hls') {\n    return Vhs.supportsNativeHls;\n  }\n\n  if (type === 'dash') {\n    return Vhs.supportsNativeDash;\n  }\n\n  return false;\n};\n/**\n * HLS is a source handler, not a tech. Make sure attempts to use it\n * as one do not cause exceptions.\n */\n\n\nVhs.isSupported = function () {\n  return videojs.log.warn('HLS is no longer a tech. Please remove it from ' + 'your player\\'s techOrder.');\n};\n\nvar Component = videojs.getComponent('Component');\n/**\n * The Vhs Handler object, where we orchestrate all of the parts\n * of HLS to interact with video.js\n *\n * @class VhsHandler\n * @extends videojs.Component\n * @param {Object} source the soruce object\n * @param {Tech} tech the parent tech object\n * @param {Object} options optional and required options\n */\n\nvar VhsHandler = /*#__PURE__*/function (_Component) {\n  _inheritsLoose(VhsHandler, _Component);\n\n  function VhsHandler(source, tech, options) {\n    var _this;\n\n    _this = _Component.call(this, tech, videojs.mergeOptions(options.hls, options.vhs)) || this;\n\n    if (options.hls && Object.keys(options.hls).length) {\n      videojs.log.warn('Using hls options is deprecated. Please rename `hls` to `vhs` in your options object.');\n    } // if a tech level `initialBandwidth` option was passed\n    // use that over the VHS level `bandwidth` option\n\n\n    if (typeof options.initialBandwidth === 'number') {\n      _this.options_.bandwidth = options.initialBandwidth;\n    }\n\n    _this.logger_ = logger('VhsHandler'); // tech.player() is deprecated but setup a reference to HLS for\n    // backwards-compatibility\n\n    if (tech.options_ && tech.options_.playerId) {\n      var _player = videojs(tech.options_.playerId);\n\n      if (!_player.hasOwnProperty('hls')) {\n        Object.defineProperty(_player, 'hls', {\n          get: function get() {\n            videojs.log.warn('player.hls is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'hls-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('vhs')) {\n        Object.defineProperty(_player, 'vhs', {\n          get: function get() {\n            videojs.log.warn('player.vhs is deprecated. Use player.tech().vhs instead.');\n            tech.trigger({\n              type: 'usage',\n              name: 'vhs-player-access'\n            });\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      if (!_player.hasOwnProperty('dash')) {\n        Object.defineProperty(_player, 'dash', {\n          get: function get() {\n            videojs.log.warn('player.dash is deprecated. Use player.tech().vhs instead.');\n            return _assertThisInitialized(_this);\n          },\n          configurable: true\n        });\n      }\n\n      _this.player_ = _player;\n    }\n\n    _this.tech_ = tech;\n    _this.source_ = source;\n    _this.stats = {};\n    _this.ignoreNextSeekingEvent_ = false;\n\n    _this.setOptions_();\n\n    if (_this.options_.overrideNative && tech.overrideNativeAudioTracks && tech.overrideNativeVideoTracks) {\n      tech.overrideNativeAudioTracks(true);\n      tech.overrideNativeVideoTracks(true);\n    } else if (_this.options_.overrideNative && (tech.featuresNativeVideoTracks || tech.featuresNativeAudioTracks)) {\n      // overriding native HLS only works if audio tracks have been emulated\n      // error early if we're misconfigured\n      throw new Error('Overriding native HLS requires emulated tracks. ' + 'See https://git.io/vMpjB');\n    } // listen for fullscreenchange events for this player so that we\n    // can adjust our quality selection quickly\n\n\n    _this.on(document, ['fullscreenchange', 'webkitfullscreenchange', 'mozfullscreenchange', 'MSFullscreenChange'], function (event) {\n      var fullscreenElement = document.fullscreenElement || document.webkitFullscreenElement || document.mozFullScreenElement || document.msFullscreenElement;\n\n      if (fullscreenElement && fullscreenElement.contains(_this.tech_.el())) {\n        _this.masterPlaylistController_.fastQualityChange_();\n      } else {\n        // When leaving fullscreen, since the in page pixel dimensions should be smaller\n        // than full screen, see if there should be a rendition switch down to preserve\n        // bandwidth.\n        _this.masterPlaylistController_.checkABR_();\n      }\n    });\n\n    _this.on(_this.tech_, 'seeking', function () {\n      if (this.ignoreNextSeekingEvent_) {\n        this.ignoreNextSeekingEvent_ = false;\n        return;\n      }\n\n      this.setCurrentTime(this.tech_.currentTime());\n    });\n\n    _this.on(_this.tech_, 'error', function () {\n      // verify that the error was real and we are loaded\n      // enough to have mpc loaded.\n      if (this.tech_.error() && this.masterPlaylistController_) {\n        this.masterPlaylistController_.pauseLoading();\n      }\n    });\n\n    _this.on(_this.tech_, 'play', _this.play);\n\n    return _this;\n  }\n\n  var _proto = VhsHandler.prototype;\n\n  _proto.setOptions_ = function setOptions_() {\n    var _this2 = this; // defaults\n\n\n    this.options_.withCredentials = this.options_.withCredentials || false;\n    this.options_.handleManifestRedirects = this.options_.handleManifestRedirects === false ? false : true;\n    this.options_.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions === false ? false : true;\n    this.options_.useDevicePixelRatio = this.options_.useDevicePixelRatio || false;\n    this.options_.smoothQualityChange = this.options_.smoothQualityChange || false;\n    this.options_.useBandwidthFromLocalStorage = typeof this.source_.useBandwidthFromLocalStorage !== 'undefined' ? this.source_.useBandwidthFromLocalStorage : this.options_.useBandwidthFromLocalStorage || false;\n    this.options_.useNetworkInformationApi = this.options_.useNetworkInformationApi || false;\n    this.options_.useDtsForTimestampOffset = this.options_.useDtsForTimestampOffset || false;\n    this.options_.customTagParsers = this.options_.customTagParsers || [];\n    this.options_.customTagMappers = this.options_.customTagMappers || [];\n    this.options_.cacheEncryptionKeys = this.options_.cacheEncryptionKeys || false;\n\n    if (typeof this.options_.blacklistDuration !== 'number') {\n      this.options_.blacklistDuration = 5 * 60;\n    }\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      if (this.options_.useBandwidthFromLocalStorage) {\n        var storedObject = getVhsLocalStorage();\n\n        if (storedObject && storedObject.bandwidth) {\n          this.options_.bandwidth = storedObject.bandwidth;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-bandwidth-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-bandwidth-from-local-storage'\n          });\n        }\n\n        if (storedObject && storedObject.throughput) {\n          this.options_.throughput = storedObject.throughput;\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'vhs-throughput-from-local-storage'\n          });\n          this.tech_.trigger({\n            type: 'usage',\n            name: 'hls-throughput-from-local-storage'\n          });\n        }\n      }\n    } // if bandwidth was not set by options or pulled from local storage, start playlist\n    // selection at a reasonable bandwidth\n\n\n    if (typeof this.options_.bandwidth !== 'number') {\n      this.options_.bandwidth = Config.INITIAL_BANDWIDTH;\n    } // If the bandwidth number is unchanged from the initial setting\n    // then this takes precedence over the enableLowInitialPlaylist option\n\n\n    this.options_.enableLowInitialPlaylist = this.options_.enableLowInitialPlaylist && this.options_.bandwidth === Config.INITIAL_BANDWIDTH; // grab options passed to player.src\n\n    ['withCredentials', 'useDevicePixelRatio', 'limitRenditionByPlayerDimensions', 'bandwidth', 'smoothQualityChange', 'customTagParsers', 'customTagMappers', 'handleManifestRedirects', 'cacheEncryptionKeys', 'playlistSelector', 'initialPlaylistSelector', 'experimentalBufferBasedABR', 'liveRangeSafeTimeDelta', 'experimentalLLHLS', 'useNetworkInformationApi', 'useDtsForTimestampOffset', 'experimentalExactManifestTimings', 'experimentalLeastPixelDiffSelector'].forEach(function (option) {\n      if (typeof _this2.source_[option] !== 'undefined') {\n        _this2.options_[option] = _this2.source_[option];\n      }\n    });\n    this.limitRenditionByPlayerDimensions = this.options_.limitRenditionByPlayerDimensions;\n    this.useDevicePixelRatio = this.options_.useDevicePixelRatio;\n  }\n  /**\n   * called when player.src gets called, handle a new source\n   *\n   * @param {Object} src the source object to handle\n   */\n  ;\n\n  _proto.src = function src(_src, type) {\n    var _this3 = this; // do nothing if the src is falsey\n\n\n    if (!_src) {\n      return;\n    }\n\n    this.setOptions_(); // add master playlist controller options\n\n    this.options_.src = expandDataUri(this.source_.src);\n    this.options_.tech = this.tech_;\n    this.options_.externVhs = Vhs;\n    this.options_.sourceType = simpleTypeFromSourceType(type); // Whenever we seek internally, we should update the tech\n\n    this.options_.seekTo = function (time) {\n      _this3.tech_.setCurrentTime(time);\n    };\n\n    if (this.options_.smoothQualityChange) {\n      videojs.log.warn('smoothQualityChange is deprecated and will be removed in the next major version');\n    }\n\n    this.masterPlaylistController_ = new MasterPlaylistController(this.options_);\n    var playbackWatcherOptions = videojs.mergeOptions({\n      liveRangeSafeTimeDelta: SAFE_TIME_DELTA\n    }, this.options_, {\n      seekable: function seekable() {\n        return _this3.seekable();\n      },\n      media: function media() {\n        return _this3.masterPlaylistController_.media();\n      },\n      masterPlaylistController: this.masterPlaylistController_\n    });\n    this.playbackWatcher_ = new PlaybackWatcher(playbackWatcherOptions);\n    this.masterPlaylistController_.on('error', function () {\n      var player = videojs.players[_this3.tech_.options_.playerId];\n      var error = _this3.masterPlaylistController_.error;\n\n      if (typeof error === 'object' && !error.code) {\n        error.code = 3;\n      } else if (typeof error === 'string') {\n        error = {\n          message: error,\n          code: 3\n        };\n      }\n\n      player.error(error);\n    });\n    var defaultSelector = this.options_.experimentalBufferBasedABR ? Vhs.movingAverageBandwidthSelector(0.55) : Vhs.STANDARD_PLAYLIST_SELECTOR; // `this` in selectPlaylist should be the VhsHandler for backwards\n    // compatibility with < v2\n\n    this.masterPlaylistController_.selectPlaylist = this.selectPlaylist ? this.selectPlaylist.bind(this) : defaultSelector.bind(this);\n    this.masterPlaylistController_.selectInitialPlaylist = Vhs.INITIAL_PLAYLIST_SELECTOR.bind(this); // re-expose some internal objects for backwards compatibility with < v2\n\n    this.playlists = this.masterPlaylistController_.masterPlaylistLoader_;\n    this.mediaSource = this.masterPlaylistController_.mediaSource; // Proxy assignment of some properties to the master playlist\n    // controller. Using a custom property for backwards compatibility\n    // with < v2\n\n    Object.defineProperties(this, {\n      selectPlaylist: {\n        get: function get() {\n          return this.masterPlaylistController_.selectPlaylist;\n        },\n        set: function set(selectPlaylist) {\n          this.masterPlaylistController_.selectPlaylist = selectPlaylist.bind(this);\n        }\n      },\n      throughput: {\n        get: function get() {\n          return this.masterPlaylistController_.mainSegmentLoader_.throughput.rate;\n        },\n        set: function set(throughput) {\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.rate = throughput; // By setting `count` to 1 the throughput value becomes the starting value\n          // for the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput.count = 1;\n        }\n      },\n      bandwidth: {\n        get: function get() {\n          var playerBandwidthEst = this.masterPlaylistController_.mainSegmentLoader_.bandwidth;\n          var networkInformation = window$1.navigator.connection || window$1.navigator.mozConnection || window$1.navigator.webkitConnection;\n          var tenMbpsAsBitsPerSecond = 10e6;\n\n          if (this.options_.useNetworkInformationApi && networkInformation) {\n            // downlink returns Mbps\n            // https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink\n            var networkInfoBandwidthEstBitsPerSec = networkInformation.downlink * 1000 * 1000; // downlink maxes out at 10 Mbps. In the event that both networkInformationApi and the player\n            // estimate a bandwidth greater than 10 Mbps, use the larger of the two estimates to ensure that\n            // high quality streams are not filtered out.\n\n            if (networkInfoBandwidthEstBitsPerSec >= tenMbpsAsBitsPerSecond && playerBandwidthEst >= tenMbpsAsBitsPerSecond) {\n              playerBandwidthEst = Math.max(playerBandwidthEst, networkInfoBandwidthEstBitsPerSec);\n            } else {\n              playerBandwidthEst = networkInfoBandwidthEstBitsPerSec;\n            }\n          }\n\n          return playerBandwidthEst;\n        },\n        set: function set(bandwidth) {\n          this.masterPlaylistController_.mainSegmentLoader_.bandwidth = bandwidth; // setting the bandwidth manually resets the throughput counter\n          // `count` is set to zero that current value of `rate` isn't included\n          // in the cumulative average\n\n          this.masterPlaylistController_.mainSegmentLoader_.throughput = {\n            rate: 0,\n            count: 0\n          };\n        }\n      },\n\n      /**\n       * `systemBandwidth` is a combination of two serial processes bit-rates. The first\n       * is the network bitrate provided by `bandwidth` and the second is the bitrate of\n       * the entire process after that - decryption, transmuxing, and appending - provided\n       * by `throughput`.\n       *\n       * Since the two process are serial, the overall system bandwidth is given by:\n       *   sysBandwidth = 1 / (1 / bandwidth + 1 / throughput)\n       */\n      systemBandwidth: {\n        get: function get() {\n          var invBandwidth = 1 / (this.bandwidth || 1);\n          var invThroughput;\n\n          if (this.throughput > 0) {\n            invThroughput = 1 / this.throughput;\n          } else {\n            invThroughput = 0;\n          }\n\n          var systemBitrate = Math.floor(1 / (invBandwidth + invThroughput));\n          return systemBitrate;\n        },\n        set: function set() {\n          videojs.log.error('The \"systemBandwidth\" property is read-only');\n        }\n      }\n    });\n\n    if (this.options_.bandwidth) {\n      this.bandwidth = this.options_.bandwidth;\n    }\n\n    if (this.options_.throughput) {\n      this.throughput = this.options_.throughput;\n    }\n\n    Object.defineProperties(this.stats, {\n      bandwidth: {\n        get: function get() {\n          return _this3.bandwidth || 0;\n        },\n        enumerable: true\n      },\n      mediaRequests: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequests_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsAborted: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsAborted_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsTimedout: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsTimedout_() || 0;\n        },\n        enumerable: true\n      },\n      mediaRequestsErrored: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaRequestsErrored_() || 0;\n        },\n        enumerable: true\n      },\n      mediaTransferDuration: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaTransferDuration_() || 0;\n        },\n        enumerable: true\n      },\n      mediaBytesTransferred: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaBytesTransferred_() || 0;\n        },\n        enumerable: true\n      },\n      mediaSecondsLoaded: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaSecondsLoaded_() || 0;\n        },\n        enumerable: true\n      },\n      mediaAppends: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mediaAppends_() || 0;\n        },\n        enumerable: true\n      },\n      mainAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.mainAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      audioAppendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.audioAppendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      appendsToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.appendsToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      timeToLoadedData: {\n        get: function get() {\n          return _this3.masterPlaylistController_.timeToLoadedData_() || 0;\n        },\n        enumerable: true\n      },\n      buffered: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.buffered());\n        },\n        enumerable: true\n      },\n      currentTime: {\n        get: function get() {\n          return _this3.tech_.currentTime();\n        },\n        enumerable: true\n      },\n      currentSource: {\n        get: function get() {\n          return _this3.tech_.currentSource_;\n        },\n        enumerable: true\n      },\n      currentTech: {\n        get: function get() {\n          return _this3.tech_.name_;\n        },\n        enumerable: true\n      },\n      duration: {\n        get: function get() {\n          return _this3.tech_.duration();\n        },\n        enumerable: true\n      },\n      master: {\n        get: function get() {\n          return _this3.playlists.master;\n        },\n        enumerable: true\n      },\n      playerDimensions: {\n        get: function get() {\n          return _this3.tech_.currentDimensions();\n        },\n        enumerable: true\n      },\n      seekable: {\n        get: function get() {\n          return timeRangesToArray(_this3.tech_.seekable());\n        },\n        enumerable: true\n      },\n      timestamp: {\n        get: function get() {\n          return Date.now();\n        },\n        enumerable: true\n      },\n      videoPlaybackQuality: {\n        get: function get() {\n          return _this3.tech_.getVideoPlaybackQuality();\n        },\n        enumerable: true\n      }\n    });\n    this.tech_.one('canplay', this.masterPlaylistController_.setupFirstPlay.bind(this.masterPlaylistController_));\n    this.tech_.on('bandwidthupdate', function () {\n      if (_this3.options_.useBandwidthFromLocalStorage) {\n        updateVhsLocalStorage({\n          bandwidth: _this3.bandwidth,\n          throughput: Math.round(_this3.throughput)\n        });\n      }\n    });\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      // Add the manual rendition mix-in to VhsHandler\n      renditionSelectionMixin(_this3);\n    });\n    this.masterPlaylistController_.sourceUpdater_.on('createdsourcebuffers', function () {\n      _this3.setupEme_();\n    }); // the bandwidth of the primary segment loader is our best\n    // estimate of overall bandwidth\n\n    this.on(this.masterPlaylistController_, 'progress', function () {\n      this.tech_.trigger('progress');\n    }); // In the live case, we need to ignore the very first `seeking` event since\n    // that will be the result of the seek-to-live behavior\n\n    this.on(this.masterPlaylistController_, 'firstplay', function () {\n      this.ignoreNextSeekingEvent_ = true;\n    });\n    this.setupQualityLevels_(); // do nothing if the tech has been disposed already\n    // this can occur if someone sets the src in player.ready(), for instance\n\n    if (!this.tech_.el()) {\n      return;\n    }\n\n    this.mediaSourceUrl_ = window$1.URL.createObjectURL(this.masterPlaylistController_.mediaSource);\n    this.tech_.src(this.mediaSourceUrl_);\n  };\n\n  _proto.createKeySessions_ = function createKeySessions_() {\n    var _this4 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    this.logger_('waiting for EME key session creation');\n    waitForKeySessionCreation({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media(),\n      mainPlaylists: this.playlists.master.playlists\n    }).then(function () {\n      _this4.logger_('created EME key session');\n\n      _this4.masterPlaylistController_.sourceUpdater_.initializedEme();\n    })[\"catch\"](function (err) {\n      _this4.logger_('error while creating EME key session', err);\n\n      _this4.player_.error({\n        message: 'Failed to initialize media keys for EME',\n        code: 3\n      });\n    });\n  };\n\n  _proto.handleWaitingForKey_ = function handleWaitingForKey_() {\n    // If waitingforkey is fired, it's possible that the data that's necessary to retrieve\n    // the key is in the manifest. While this should've happened on initial source load, it\n    // may happen again in live streams where the keys change, and the manifest info\n    // reflects the update.\n    //\n    // Because videojs-contrib-eme compares the PSSH data we send to that of PSSH data it's\n    // already requested keys for, we don't have to worry about this generating extraneous\n    // requests.\n    this.logger_('waitingforkey fired, attempting to create any new key sessions');\n    this.createKeySessions_();\n  }\n  /**\n   * If necessary and EME is available, sets up EME options and waits for key session\n   * creation.\n   *\n   * This function also updates the source updater so taht it can be used, as for some\n   * browsers, EME must be configured before content is appended (if appending unencrypted\n   * content before encrypted content).\n   */\n  ;\n\n  _proto.setupEme_ = function setupEme_() {\n    var _this5 = this;\n\n    var audioPlaylistLoader = this.masterPlaylistController_.mediaTypes_.AUDIO.activePlaylistLoader;\n    var didSetupEmeOptions = setupEmeOptions({\n      player: this.player_,\n      sourceKeySystems: this.source_.keySystems,\n      media: this.playlists.media(),\n      audioMedia: audioPlaylistLoader && audioPlaylistLoader.media()\n    });\n    this.player_.tech_.on('keystatuschange', function (e) {\n      if (e.status !== 'output-restricted') {\n        return;\n      }\n\n      var masterPlaylist = _this5.masterPlaylistController_.master();\n\n      if (!masterPlaylist || !masterPlaylist.playlists) {\n        return;\n      }\n\n      var excludedHDPlaylists = []; // Assume all HD streams are unplayable and exclude them from ABR selection\n\n      masterPlaylist.playlists.forEach(function (playlist) {\n        if (playlist && playlist.attributes && playlist.attributes.RESOLUTION && playlist.attributes.RESOLUTION.height >= 720) {\n          if (!playlist.excludeUntil || playlist.excludeUntil < Infinity) {\n            playlist.excludeUntil = Infinity;\n            excludedHDPlaylists.push(playlist);\n          }\n        }\n      });\n\n      if (excludedHDPlaylists.length) {\n        var _videojs$log;\n\n        (_videojs$log = videojs.log).warn.apply(_videojs$log, ['DRM keystatus changed to \"output-restricted.\" Removing the following HD playlists ' + 'that will most likely fail to play and clearing the buffer. ' + 'This may be due to HDCP restrictions on the stream and the capabilities of the current device.'].concat(excludedHDPlaylists)); // Clear the buffer before switching playlists, since it may already contain unplayable segments\n\n\n        _this5.masterPlaylistController_.fastQualityChange_();\n      }\n    });\n    this.handleWaitingForKey_ = this.handleWaitingForKey_.bind(this);\n    this.player_.tech_.on('waitingforkey', this.handleWaitingForKey_); // In IE11 this is too early to initialize media keys, and IE11 does not support\n    // promises.\n\n    if (videojs.browser.IE_VERSION === 11 || !didSetupEmeOptions) {\n      // If EME options were not set up, we've done all we could to initialize EME.\n      this.masterPlaylistController_.sourceUpdater_.initializedEme();\n      return;\n    }\n\n    this.createKeySessions_();\n  }\n  /**\n   * Initializes the quality levels and sets listeners to update them.\n   *\n   * @method setupQualityLevels_\n   * @private\n   */\n  ;\n\n  _proto.setupQualityLevels_ = function setupQualityLevels_() {\n    var _this6 = this;\n\n    var player = videojs.players[this.tech_.options_.playerId]; // if there isn't a player or there isn't a qualityLevels plugin\n    // or qualityLevels_ listeners have already been setup, do nothing.\n\n    if (!player || !player.qualityLevels || this.qualityLevels_) {\n      return;\n    }\n\n    this.qualityLevels_ = player.qualityLevels();\n    this.masterPlaylistController_.on('selectedinitialmedia', function () {\n      handleVhsLoadedMetadata(_this6.qualityLevels_, _this6);\n    });\n    this.playlists.on('mediachange', function () {\n      handleVhsMediaChange(_this6.qualityLevels_, _this6.playlists);\n    });\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  VhsHandler.version = function version$5() {\n    return {\n      '@videojs/http-streaming': version$4,\n      'mux.js': version$3,\n      'mpd-parser': version$2,\n      'm3u8-parser': version$1,\n      'aes-decrypter': version\n    };\n  }\n  /**\n   * return the version\n   */\n  ;\n\n  _proto.version = function version() {\n    return this.constructor.version();\n  };\n\n  _proto.canChangeType = function canChangeType() {\n    return SourceUpdater.canChangeType();\n  }\n  /**\n   * Begin playing the video.\n   */\n  ;\n\n  _proto.play = function play() {\n    this.masterPlaylistController_.play();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.setCurrentTime = function setCurrentTime(currentTime) {\n    this.masterPlaylistController_.setCurrentTime(currentTime);\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.duration = function duration() {\n    return this.masterPlaylistController_.duration();\n  }\n  /**\n   * a wrapper around the function in MasterPlaylistController\n   */\n  ;\n\n  _proto.seekable = function seekable() {\n    return this.masterPlaylistController_.seekable();\n  }\n  /**\n   * Abort all outstanding work and cleanup.\n   */\n  ;\n\n  _proto.dispose = function dispose() {\n    if (this.playbackWatcher_) {\n      this.playbackWatcher_.dispose();\n    }\n\n    if (this.masterPlaylistController_) {\n      this.masterPlaylistController_.dispose();\n    }\n\n    if (this.qualityLevels_) {\n      this.qualityLevels_.dispose();\n    }\n\n    if (this.player_) {\n      delete this.player_.vhs;\n      delete this.player_.dash;\n      delete this.player_.hls;\n    }\n\n    if (this.tech_ && this.tech_.vhs) {\n      delete this.tech_.vhs;\n    } // don't check this.tech_.hls as it will log a deprecated warning\n\n\n    if (this.tech_) {\n      delete this.tech_.hls;\n    }\n\n    if (this.mediaSourceUrl_ && window$1.URL.revokeObjectURL) {\n      window$1.URL.revokeObjectURL(this.mediaSourceUrl_);\n      this.mediaSourceUrl_ = null;\n    }\n\n    if (this.tech_) {\n      this.tech_.off('waitingforkey', this.handleWaitingForKey_);\n    }\n\n    _Component.prototype.dispose.call(this);\n  };\n\n  _proto.convertToProgramTime = function convertToProgramTime(time, callback) {\n    return getProgramTime({\n      playlist: this.masterPlaylistController_.media(),\n      time: time,\n      callback: callback\n    });\n  } // the player must be playing before calling this\n  ;\n\n  _proto.seekToProgramTime = function seekToProgramTime$1(programTime, callback, pauseAfterSeek, retryCount) {\n    if (pauseAfterSeek === void 0) {\n      pauseAfterSeek = true;\n    }\n\n    if (retryCount === void 0) {\n      retryCount = 2;\n    }\n\n    return seekToProgramTime({\n      programTime: programTime,\n      playlist: this.masterPlaylistController_.media(),\n      retryCount: retryCount,\n      pauseAfterSeek: pauseAfterSeek,\n      seekTo: this.options_.seekTo,\n      tech: this.options_.tech,\n      callback: callback\n    });\n  };\n\n  return VhsHandler;\n}(Component);\n/**\n * The Source Handler object, which informs video.js what additional\n * MIME types are supported and sets up playback. It is registered\n * automatically to the appropriate tech based on the capabilities of\n * the browser it is running in. It is not necessary to use or modify\n * this object in normal usage.\n */\n\n\nvar VhsSourceHandler = {\n  name: 'videojs-http-streaming',\n  VERSION: version$4,\n  canHandleSource: function canHandleSource(srcObj, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    return VhsSourceHandler.canPlayType(srcObj.type, localOptions);\n  },\n  handleSource: function handleSource(source, tech, options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var localOptions = videojs.mergeOptions(videojs.options, options);\n    tech.vhs = new VhsHandler(source, tech, localOptions);\n\n    if (!videojs.hasOwnProperty('hls')) {\n      Object.defineProperty(tech, 'hls', {\n        get: function get() {\n          videojs.log.warn('player.tech().hls is deprecated. Use player.tech().vhs instead.');\n          return tech.vhs;\n        },\n        configurable: true\n      });\n    }\n\n    tech.vhs.xhr = xhrFactory();\n    tech.vhs.src(source.src, source.type);\n    return tech.vhs;\n  },\n  canPlayType: function canPlayType(type, options) {\n    var simpleType = simpleTypeFromSourceType(type);\n\n    if (!simpleType) {\n      return '';\n    }\n\n    var overrideNative = VhsSourceHandler.getOverrideNative(options);\n    var supportsTypeNatively = Vhs.supportsTypeNatively(simpleType);\n    var canUseMsePlayback = !supportsTypeNatively || overrideNative;\n    return canUseMsePlayback ? 'maybe' : '';\n  },\n  getOverrideNative: function getOverrideNative(options) {\n    if (options === void 0) {\n      options = {};\n    }\n\n    var _options = options,\n        _options$vhs = _options.vhs,\n        vhs = _options$vhs === void 0 ? {} : _options$vhs,\n        _options$hls = _options.hls,\n        hls = _options$hls === void 0 ? {} : _options$hls;\n    var defaultOverrideNative = !(videojs.browser.IS_ANY_SAFARI || videojs.browser.IS_IOS);\n    var _vhs$overrideNative = vhs.overrideNative,\n        overrideNative = _vhs$overrideNative === void 0 ? defaultOverrideNative : _vhs$overrideNative;\n    var _hls$overrideNative = hls.overrideNative,\n        legacyOverrideNative = _hls$overrideNative === void 0 ? false : _hls$overrideNative;\n    return legacyOverrideNative || overrideNative;\n  }\n};\n/**\n * Check to see if the native MediaSource object exists and supports\n * an MP4 container with both H.264 video and AAC-LC audio.\n *\n * @return {boolean} if  native media sources are supported\n */\n\nvar supportsNativeMediaSources = function supportsNativeMediaSources() {\n  return browserSupportsCodec('avc1.4d400d,mp4a.40.2');\n}; // register source handlers with the appropriate techs\n\n\nif (supportsNativeMediaSources()) {\n  videojs.getTech('Html5').registerSourceHandler(VhsSourceHandler, 0);\n}\n\nvideojs.VhsHandler = VhsHandler;\nObject.defineProperty(videojs, 'HlsHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsHandler is deprecated. Use videojs.VhsHandler instead.');\n    return VhsHandler;\n  },\n  configurable: true\n});\nvideojs.VhsSourceHandler = VhsSourceHandler;\nObject.defineProperty(videojs, 'HlsSourceHandler', {\n  get: function get() {\n    videojs.log.warn('videojs.HlsSourceHandler is deprecated. ' + 'Use videojs.VhsSourceHandler instead.');\n    return VhsSourceHandler;\n  },\n  configurable: true\n});\nvideojs.Vhs = Vhs;\nObject.defineProperty(videojs, 'Hls', {\n  get: function get() {\n    videojs.log.warn('videojs.Hls is deprecated. Use videojs.Vhs instead.');\n    return Vhs;\n  },\n  configurable: true\n});\n\nif (!videojs.use) {\n  videojs.registerComponent('Hls', Vhs);\n  videojs.registerComponent('Vhs', Vhs);\n}\n\nvideojs.options.vhs = videojs.options.vhs || {};\nvideojs.options.hls = videojs.options.hls || {};\n\nif (!videojs.getPlugin || !videojs.getPlugin('reloadSourceOnError')) {\n  var registerPlugin = videojs.registerPlugin || videojs.plugin;\n  registerPlugin('reloadSourceOnError', reloadSourceOnError);\n}\n\nexport default videojs;\n","module.exports = require('events').EventEmitter;\n","var hiddenKeys = require('../internals/hidden-keys');\nvar isObject = require('../internals/is-object');\nvar has = require('../internals/has');\nvar defineProperty = require('../internals/object-define-property').f;\nvar uid = require('../internals/uid');\nvar FREEZING = require('../internals/freezing');\n\nvar METADATA = uid('meta');\nvar id = 0;\n\n// eslint-disable-next-line es/no-object-isextensible -- safe\nvar isExtensible = Object.isExtensible || function () {\n  return true;\n};\n\nvar setMetadata = function (it) {\n  defineProperty(it, METADATA, { value: {\n    objectID: 'O' + ++id, // object ID\n    weakData: {}          // weak collections IDs\n  } });\n};\n\nvar fastKey = function (it, create) {\n  // return a primitive with prefix\n  if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;\n  if (!has(it, METADATA)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return 'F';\n    // not necessary to add metadata\n    if (!create) return 'E';\n    // add missing metadata\n    setMetadata(it);\n  // return object ID\n  } return it[METADATA].objectID;\n};\n\nvar getWeakData = function (it, create) {\n  if (!has(it, METADATA)) {\n    // can't set metadata to uncaught frozen object\n    if (!isExtensible(it)) return true;\n    // not necessary to add metadata\n    if (!create) return false;\n    // add missing metadata\n    setMetadata(it);\n  // return the store of weak collections IDs\n  } return it[METADATA].weakData;\n};\n\n// add metadata on freeze-family methods calling\nvar onFreeze = function (it) {\n  if (FREEZING && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);\n  return it;\n};\n\nvar meta = module.exports = {\n  REQUIRED: false,\n  fastKey: fastKey,\n  getWeakData: getWeakData,\n  onFreeze: onFreeze\n};\n\nhiddenKeys[METADATA] = true;\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n// a transform stream is a readable/writable stream where you do\n// something with the data.  Sometimes it's called a \"filter\",\n// but that's not a great name for it, since that implies a thing where\n// some bits pass through, and others are simply ignored.  (That would\n// be a valid example of a transform, of course.)\n//\n// While the output is causally related to the input, it's not a\n// necessarily symmetric or synchronous transformation.  For example,\n// a zlib stream might take multiple plain-text writes(), and then\n// emit a single compressed chunk some time in the future.\n//\n// Here's how this works:\n//\n// The Transform stream has all the aspects of the readable and writable\n// stream classes.  When you write(chunk), that calls _write(chunk,cb)\n// internally, and returns false if there's a lot of pending writes\n// buffered up.  When you call read(), that calls _read(n) until\n// there's enough pending readable data buffered up.\n//\n// In a transform stream, the written data is placed in a buffer.  When\n// _read(n) is called, it transforms the queued up data, calling the\n// buffered _write cb's as it consumes chunks.  If consuming a single\n// written chunk would result in multiple output chunks, then the first\n// outputted bit calls the readcb, and subsequent chunks just go into\n// the read buffer, and will cause it to emit 'readable' if necessary.\n//\n// This way, back-pressure is actually determined by the reading side,\n// since _read has to be called to start processing a new chunk.  However,\n// a pathological inflate type of transform can cause excessive buffering\n// here.  For example, imagine a stream where every byte of input is\n// interpreted as an integer from 0-255, and then results in that many\n// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in\n// 1kb of data being output.  In this case, you could write a very small\n// amount of input, and end up with a very large amount of output.  In\n// such a pathological inflating mechanism, there'd be no way to tell\n// the system to stop doing the transform.  A single 4MB write could\n// cause the system to run out of memory.\n//\n// However, even in such a pathological case, only a single written chunk\n// would be consumed, and then the rest would wait (un-transformed) until\n// the results of the previous transformed chunk were consumed.\n'use strict';\n\nmodule.exports = Transform;\n\nvar _require$codes = require('../errors').codes,\n    ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,\n    ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,\n    ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,\n    ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;\n\nvar Duplex = require('./_stream_duplex');\n\nrequire('inherits')(Transform, Duplex);\n\nfunction afterTransform(er, data) {\n  var ts = this._transformState;\n  ts.transforming = false;\n  var cb = ts.writecb;\n\n  if (cb === null) {\n    return this.emit('error', new ERR_MULTIPLE_CALLBACK());\n  }\n\n  ts.writechunk = null;\n  ts.writecb = null;\n  if (data != null) // single equals check for both `null` and `undefined`\n    this.push(data);\n  cb(er);\n  var rs = this._readableState;\n  rs.reading = false;\n\n  if (rs.needReadable || rs.length < rs.highWaterMark) {\n    this._read(rs.highWaterMark);\n  }\n}\n\nfunction Transform(options) {\n  if (!(this instanceof Transform)) return new Transform(options);\n  Duplex.call(this, options);\n  this._transformState = {\n    afterTransform: afterTransform.bind(this),\n    needTransform: false,\n    transforming: false,\n    writecb: null,\n    writechunk: null,\n    writeencoding: null\n  }; // start out asking for a readable event once data is transformed.\n\n  this._readableState.needReadable = true; // we have implemented the _read method, and done the other things\n  // that Readable wants before the first _read call, so unset the\n  // sync guard flag.\n\n  this._readableState.sync = false;\n\n  if (options) {\n    if (typeof options.transform === 'function') this._transform = options.transform;\n    if (typeof options.flush === 'function') this._flush = options.flush;\n  } // When the writable side finishes, then flush out anything remaining.\n\n\n  this.on('prefinish', prefinish);\n}\n\nfunction prefinish() {\n  var _this = this;\n\n  if (typeof this._flush === 'function' && !this._readableState.destroyed) {\n    this._flush(function (er, data) {\n      done(_this, er, data);\n    });\n  } else {\n    done(this, null, null);\n  }\n}\n\nTransform.prototype.push = function (chunk, encoding) {\n  this._transformState.needTransform = false;\n  return Duplex.prototype.push.call(this, chunk, encoding);\n}; // This is the part where you do stuff!\n// override this function in implementation classes.\n// 'chunk' is an input chunk.\n//\n// Call `push(newChunk)` to pass along transformed output\n// to the readable side.  You may call 'push' zero or more times.\n//\n// Call `cb(err)` when you are done with this chunk.  If you pass\n// an error, then that'll put the hurt on the whole operation.  If you\n// never call cb(), then you'll never get another chunk.\n\n\nTransform.prototype._transform = function (chunk, encoding, cb) {\n  cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));\n};\n\nTransform.prototype._write = function (chunk, encoding, cb) {\n  var ts = this._transformState;\n  ts.writecb = cb;\n  ts.writechunk = chunk;\n  ts.writeencoding = encoding;\n\n  if (!ts.transforming) {\n    var rs = this._readableState;\n    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);\n  }\n}; // Doesn't matter what the args are here.\n// _transform does all the work.\n// That we got here means that the readable side wants more data.\n\n\nTransform.prototype._read = function (n) {\n  var ts = this._transformState;\n\n  if (ts.writechunk !== null && !ts.transforming) {\n    ts.transforming = true;\n\n    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);\n  } else {\n    // mark that we need a transform, so that any data that comes in\n    // will get processed, now that we've asked for it.\n    ts.needTransform = true;\n  }\n};\n\nTransform.prototype._destroy = function (err, cb) {\n  Duplex.prototype._destroy.call(this, err, function (err2) {\n    cb(err2);\n  });\n};\n\nfunction done(stream, er, data) {\n  if (er) return stream.emit('error', er);\n  if (data != null) // single equals check for both `null` and `undefined`\n    stream.push(data); // TODO(BridgeAR): Write a test for these two error cases\n  // if there's nothing in the write buffer, then that means\n  // that nothing more will ever be provided\n\n  if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();\n  if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();\n  return stream.push(null);\n}","/**\n * @file bin-utils.js\n */\n\n/**\n * convert a TimeRange to text\n *\n * @param {TimeRange} range the timerange to use for conversion\n * @param {Number} i the iterator on the range to convert\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\nvar textRange = function textRange(range, i) {\n  return range.start(i) + '-' + range.end(i);\n};\n\n/**\n * format a number as hex string\n *\n * @param {Number} e The number\n * @param {Number} i the iterator\n */\nvar formatHexString = function formatHexString(e, i) {\n  var value = e.toString(16);\n\n  return '00'.substring(0, 2 - value.length) + value + (i % 2 ? ' ' : '');\n};\nvar formatAsciiString = function formatAsciiString(e) {\n  if (e >= 0x20 && e < 0x7e) {\n    return String.fromCharCode(e);\n  }\n  return '.';\n};\n\n/**\n * Creates an object for sending to a web worker modifying properties that are TypedArrays\n * into a new object with seperated properties for the buffer, byteOffset, and byteLength.\n *\n * @param {Object} message\n *        Object of properties and values to send to the web worker\n * @return {Object}\n *         Modified message with TypedArray values expanded\n * @function createTransferableMessage\n */\nvar createTransferableMessage = function createTransferableMessage(message) {\n  var transferable = {};\n\n  Object.keys(message).forEach(function (key) {\n    var value = message[key];\n\n    if (ArrayBuffer.isView(value)) {\n      transferable[key] = {\n        bytes: value.buffer,\n        byteOffset: value.byteOffset,\n        byteLength: value.byteLength\n      };\n    } else {\n      transferable[key] = value;\n    }\n  });\n\n  return transferable;\n};\n\n/**\n * Returns a unique string identifier for a media initialization\n * segment.\n */\nvar initSegmentId = function initSegmentId(initSegment) {\n  var byterange = initSegment.byterange || {\n    length: Infinity,\n    offset: 0\n  };\n\n  return [byterange.length, byterange.offset, initSegment.resolvedUri].join(',');\n};\n\n/**\n * utils to help dump binary data to the console\n */\nvar utils = {\n  hexDump: function hexDump(data) {\n    var bytes = Array.prototype.slice.call(data);\n    var step = 16;\n    var result = '';\n    var hex = undefined;\n    var ascii = undefined;\n\n    for (var j = 0; j < bytes.length / step; j++) {\n      hex = bytes.slice(j * step, j * step + step).map(formatHexString).join('');\n      ascii = bytes.slice(j * step, j * step + step).map(formatAsciiString).join('');\n      result += hex + ' ' + ascii + '\\n';\n    }\n    return result;\n  },\n  tagDump: function tagDump(tag) {\n    return utils.hexDump(tag.bytes);\n  },\n  textRanges: function textRanges(ranges) {\n    var result = '';\n    var i = undefined;\n\n    for (i = 0; i < ranges.length; i++) {\n      result += textRange(ranges, i) + ' ';\n    }\n    return result;\n  },\n  createTransferableMessage: createTransferableMessage,\n  initSegmentId: initSegmentId\n};\n\nexports['default'] = utils;\nmodule.exports = exports['default'];","import { HOOK_PLUGIN_SETTINGS_SET } from './const';\nexport class ApiProxy {\n    constructor(plugin, hook) {\n        this.target = null;\n        this.targetQueue = [];\n        this.onQueue = [];\n        this.plugin = plugin;\n        this.hook = hook;\n        const defaultSettings = {};\n        if (plugin.settings) {\n            for (const id in plugin.settings) {\n                const item = plugin.settings[id];\n                defaultSettings[id] = item.defaultValue;\n            }\n        }\n        const localSettingsSaveId = `__vue-devtools-plugin-settings__${plugin.id}`;\n        let currentSettings = { ...defaultSettings };\n        try {\n            const raw = localStorage.getItem(localSettingsSaveId);\n            const data = JSON.parse(raw);\n            Object.assign(currentSettings, data);\n        }\n        catch (e) {\n            // noop\n        }\n        this.fallbacks = {\n            getSettings() {\n                return currentSettings;\n            },\n            setSettings(value) {\n                try {\n                    localStorage.setItem(localSettingsSaveId, JSON.stringify(value));\n                }\n                catch (e) {\n                    // noop\n                }\n                currentSettings = value;\n            }\n        };\n        hook.on(HOOK_PLUGIN_SETTINGS_SET, (pluginId, value) => {\n            if (pluginId === this.plugin.id) {\n                this.fallbacks.setSettings(value);\n            }\n        });\n        this.proxiedOn = new Proxy({}, {\n            get: (_target, prop) => {\n                if (this.target) {\n                    return this.target.on[prop];\n                }\n                else {\n                    return (...args) => {\n                        this.onQueue.push({\n                            method: prop,\n                            args\n                        });\n                    };\n                }\n            }\n        });\n        this.proxiedTarget = new Proxy({}, {\n            get: (_target, prop) => {\n                if (this.target) {\n                    return this.target[prop];\n                }\n                else if (prop === 'on') {\n                    return this.proxiedOn;\n                }\n                else if (Object.keys(this.fallbacks).includes(prop)) {\n                    return (...args) => {\n                        this.targetQueue.push({\n                            method: prop,\n                            args,\n                            resolve: () => { }\n                        });\n                        return this.fallbacks[prop](...args);\n                    };\n                }\n                else {\n                    return (...args) => {\n                        return new Promise(resolve => {\n                            this.targetQueue.push({\n                                method: prop,\n                                args,\n                                resolve\n                            });\n                        });\n                    };\n                }\n            }\n        });\n    }\n    async setRealTarget(target) {\n        this.target = target;\n        for (const item of this.onQueue) {\n            this.target.on[item.method](...item.args);\n        }\n        for (const item of this.targetQueue) {\n            item.resolve(await this.target[item.method](...item.args));\n        }\n    }\n}\n","'use strict';\n\nvar utils = exports;\nvar BN = require('bn.js');\nvar minAssert = require('minimalistic-assert');\nvar minUtils = require('minimalistic-crypto-utils');\n\nutils.assert = minAssert;\nutils.toArray = minUtils.toArray;\nutils.zero2 = minUtils.zero2;\nutils.toHex = minUtils.toHex;\nutils.encode = minUtils.encode;\n\n// Represent num in a w-NAF form\nfunction getNAF(num, w, bits) {\n  var naf = new Array(Math.max(num.bitLength(), bits) + 1);\n  naf.fill(0);\n\n  var ws = 1 << (w + 1);\n  var k = num.clone();\n\n  for (var i = 0; i < naf.length; i++) {\n    var z;\n    var mod = k.andln(ws - 1);\n    if (k.isOdd()) {\n      if (mod > (ws >> 1) - 1)\n        z = (ws >> 1) - mod;\n      else\n        z = mod;\n      k.isubn(z);\n    } else {\n      z = 0;\n    }\n\n    naf[i] = z;\n    k.iushrn(1);\n  }\n\n  return naf;\n}\nutils.getNAF = getNAF;\n\n// Represent k1, k2 in a Joint Sparse Form\nfunction getJSF(k1, k2) {\n  var jsf = [\n    [],\n    [],\n  ];\n\n  k1 = k1.clone();\n  k2 = k2.clone();\n  var d1 = 0;\n  var d2 = 0;\n  var m8;\n  while (k1.cmpn(-d1) > 0 || k2.cmpn(-d2) > 0) {\n    // First phase\n    var m14 = (k1.andln(3) + d1) & 3;\n    var m24 = (k2.andln(3) + d2) & 3;\n    if (m14 === 3)\n      m14 = -1;\n    if (m24 === 3)\n      m24 = -1;\n    var u1;\n    if ((m14 & 1) === 0) {\n      u1 = 0;\n    } else {\n      m8 = (k1.andln(7) + d1) & 7;\n      if ((m8 === 3 || m8 === 5) && m24 === 2)\n        u1 = -m14;\n      else\n        u1 = m14;\n    }\n    jsf[0].push(u1);\n\n    var u2;\n    if ((m24 & 1) === 0) {\n      u2 = 0;\n    } else {\n      m8 = (k2.andln(7) + d2) & 7;\n      if ((m8 === 3 || m8 === 5) && m14 === 2)\n        u2 = -m24;\n      else\n        u2 = m24;\n    }\n    jsf[1].push(u2);\n\n    // Second phase\n    if (2 * d1 === u1 + 1)\n      d1 = 1 - d1;\n    if (2 * d2 === u2 + 1)\n      d2 = 1 - d2;\n    k1.iushrn(1);\n    k2.iushrn(1);\n  }\n\n  return jsf;\n}\nutils.getJSF = getJSF;\n\nfunction cachedProperty(obj, name, computer) {\n  var key = '_' + name;\n  obj.prototype[name] = function cachedProperty() {\n    return this[key] !== undefined ? this[key] :\n      this[key] = computer.call(this);\n  };\n}\nutils.cachedProperty = cachedProperty;\n\nfunction parseBytes(bytes) {\n  return typeof bytes === 'string' ? utils.toArray(bytes, 'hex') :\n    bytes;\n}\nutils.parseBytes = parseBytes;\n\nfunction intFromLE(bytes) {\n  return new BN(bytes, 'hex', 'le');\n}\nutils.intFromLE = intFromLE;\n\n","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _stream = require('./stream');\n\nvar _stream2 = _interopRequireDefault(_stream);\n\nvar _lineStream = require('./line-stream');\n\nvar _lineStream2 = _interopRequireDefault(_lineStream);\n\nvar _parseStream = require('./parse-stream');\n\nvar _parseStream2 = _interopRequireDefault(_parseStream);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                * @file m3u8/parser.js\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                */\n\n\n/**\n * A parser for M3U8 files. The current interpretation of the input is\n * exposed as a property `manifest` on parser objects. It's just two lines to\n * create and parse a manifest once you have the contents available as a string:\n *\n * ```js\n * var parser = new m3u8.Parser();\n * parser.push(xhr.responseText);\n * ```\n *\n * New input can later be applied to update the manifest object by calling\n * `push` again.\n *\n * The parser attempts to create a usable manifest object even if the\n * underlying input is somewhat nonsensical. It emits `info` and `warning`\n * events during the parse if it encounters input that seems invalid or\n * requires some property of the manifest object to be defaulted.\n *\n * @class Parser\n * @extends Stream\n */\nvar Parser = function (_Stream) {\n  _inherits(Parser, _Stream);\n\n  function Parser() {\n    _classCallCheck(this, Parser);\n\n    var _this = _possibleConstructorReturn(this, (Parser.__proto__ || Object.getPrototypeOf(Parser)).call(this));\n\n    _this.lineStream = new _lineStream2['default']();\n    _this.parseStream = new _parseStream2['default']();\n    _this.lineStream.pipe(_this.parseStream);\n    /* eslint-disable consistent-this */\n    var self = _this;\n    /* eslint-enable consistent-this */\n    var uris = [];\n    var currentUri = {};\n    // if specified, the active EXT-X-MAP definition\n    var currentMap = void 0;\n    // if specified, the active decryption key\n    var _key = void 0;\n    var noop = function noop() {};\n    var defaultMediaGroups = {\n      'AUDIO': {},\n      'VIDEO': {},\n      'CLOSED-CAPTIONS': {},\n      'SUBTITLES': {}\n    };\n    // group segments into numbered timelines delineated by discontinuities\n    var currentTimeline = 0;\n\n    // the manifest is empty until the parse stream begins delivering data\n    _this.manifest = {\n      allowCache: true,\n      discontinuityStarts: [],\n      segments: []\n    };\n\n    // update the manifest with the m3u8 entry from the parse stream\n    _this.parseStream.on('data', function (entry) {\n      var mediaGroup = void 0;\n      var rendition = void 0;\n\n      ({\n        tag: function tag() {\n          // switch based on the tag type\n          (({\n            'allow-cache': function allowCache() {\n              this.manifest.allowCache = entry.allowed;\n              if (!('allowed' in entry)) {\n                this.trigger('info', {\n                  message: 'defaulting allowCache to YES'\n                });\n                this.manifest.allowCache = true;\n              }\n            },\n            byterange: function byterange() {\n              var byterange = {};\n\n              if ('length' in entry) {\n                currentUri.byterange = byterange;\n                byterange.length = entry.length;\n\n                if (!('offset' in entry)) {\n                  this.trigger('info', {\n                    message: 'defaulting offset to zero'\n                  });\n                  entry.offset = 0;\n                }\n              }\n              if ('offset' in entry) {\n                currentUri.byterange = byterange;\n                byterange.offset = entry.offset;\n              }\n            },\n            endlist: function endlist() {\n              this.manifest.endList = true;\n            },\n            inf: function inf() {\n              if (!('mediaSequence' in this.manifest)) {\n                this.manifest.mediaSequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting media sequence to zero'\n                });\n              }\n              if (!('discontinuitySequence' in this.manifest)) {\n                this.manifest.discontinuitySequence = 0;\n                this.trigger('info', {\n                  message: 'defaulting discontinuity sequence to zero'\n                });\n              }\n              if (entry.duration > 0) {\n                currentUri.duration = entry.duration;\n              }\n\n              if (entry.duration === 0) {\n                currentUri.duration = 0.01;\n                this.trigger('info', {\n                  message: 'updating zero segment duration to a small value'\n                });\n              }\n\n              this.manifest.segments = uris;\n            },\n            key: function key() {\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without attribute list'\n                });\n                return;\n              }\n              // clear the active encryption key\n              if (entry.attributes.METHOD === 'NONE') {\n                _key = null;\n                return;\n              }\n              if (!entry.attributes.URI) {\n                this.trigger('warn', {\n                  message: 'ignoring key declaration without URI'\n                });\n                return;\n              }\n              if (!entry.attributes.METHOD) {\n                this.trigger('warn', {\n                  message: 'defaulting key method to AES-128'\n                });\n              }\n\n              // setup an encryption key for upcoming segments\n              _key = {\n                method: entry.attributes.METHOD || 'AES-128',\n                uri: entry.attributes.URI\n              };\n\n              if (typeof entry.attributes.IV !== 'undefined') {\n                _key.iv = entry.attributes.IV;\n              }\n            },\n            'media-sequence': function mediaSequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid media sequence: ' + entry.number\n                });\n                return;\n              }\n              this.manifest.mediaSequence = entry.number;\n            },\n            'discontinuity-sequence': function discontinuitySequence() {\n              if (!isFinite(entry.number)) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid discontinuity sequence: ' + entry.number\n                });\n                return;\n              }\n              this.manifest.discontinuitySequence = entry.number;\n              currentTimeline = entry.number;\n            },\n            'playlist-type': function playlistType() {\n              if (!/VOD|EVENT/.test(entry.playlistType)) {\n                this.trigger('warn', {\n                  message: 'ignoring unknown playlist type: ' + entry.playlist\n                });\n                return;\n              }\n              this.manifest.playlistType = entry.playlistType;\n            },\n            map: function map() {\n              currentMap = {};\n              if (entry.uri) {\n                currentMap.uri = entry.uri;\n              }\n              if (entry.byterange) {\n                currentMap.byterange = entry.byterange;\n              }\n            },\n            'stream-inf': function streamInf() {\n              this.manifest.playlists = uris;\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!entry.attributes) {\n                this.trigger('warn', {\n                  message: 'ignoring empty stream-inf attributes'\n                });\n                return;\n              }\n\n              if (!currentUri.attributes) {\n                currentUri.attributes = {};\n              }\n              _extends(currentUri.attributes, entry.attributes);\n            },\n            media: function media() {\n              this.manifest.mediaGroups = this.manifest.mediaGroups || defaultMediaGroups;\n\n              if (!(entry.attributes && entry.attributes.TYPE && entry.attributes['GROUP-ID'] && entry.attributes.NAME)) {\n                this.trigger('warn', {\n                  message: 'ignoring incomplete or missing media group'\n                });\n                return;\n              }\n\n              // find the media group, creating defaults as necessary\n              var mediaGroupType = this.manifest.mediaGroups[entry.attributes.TYPE];\n\n              mediaGroupType[entry.attributes['GROUP-ID']] = mediaGroupType[entry.attributes['GROUP-ID']] || {};\n              mediaGroup = mediaGroupType[entry.attributes['GROUP-ID']];\n\n              // collect the rendition metadata\n              rendition = {\n                'default': /yes/i.test(entry.attributes.DEFAULT)\n              };\n              if (rendition['default']) {\n                rendition.autoselect = true;\n              } else {\n                rendition.autoselect = /yes/i.test(entry.attributes.AUTOSELECT);\n              }\n              if (entry.attributes.LANGUAGE) {\n                rendition.language = entry.attributes.LANGUAGE;\n              }\n              if (entry.attributes.URI) {\n                rendition.uri = entry.attributes.URI;\n              }\n              if (entry.attributes['INSTREAM-ID']) {\n                rendition.instreamId = entry.attributes['INSTREAM-ID'];\n              }\n              if (entry.attributes.CHARACTERISTICS) {\n                rendition.characteristics = entry.attributes.CHARACTERISTICS;\n              }\n              if (entry.attributes.FORCED) {\n                rendition.forced = /yes/i.test(entry.attributes.FORCED);\n              }\n\n              // insert the new rendition\n              mediaGroup[entry.attributes.NAME] = rendition;\n            },\n            discontinuity: function discontinuity() {\n              currentTimeline += 1;\n              currentUri.discontinuity = true;\n              this.manifest.discontinuityStarts.push(uris.length);\n            },\n            'program-date-time': function programDateTime() {\n              this.manifest.dateTimeString = entry.dateTimeString;\n              this.manifest.dateTimeObject = entry.dateTimeObject;\n            },\n            targetduration: function targetduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid target duration: ' + entry.duration\n                });\n                return;\n              }\n              this.manifest.targetDuration = entry.duration;\n            },\n            totalduration: function totalduration() {\n              if (!isFinite(entry.duration) || entry.duration < 0) {\n                this.trigger('warn', {\n                  message: 'ignoring invalid total duration: ' + entry.duration\n                });\n                return;\n              }\n              this.manifest.totalDuration = entry.duration;\n            },\n            'cue-out': function cueOut() {\n              currentUri.cueOut = entry.data;\n            },\n            'cue-out-cont': function cueOutCont() {\n              currentUri.cueOutCont = entry.data;\n            },\n            'cue-in': function cueIn() {\n              currentUri.cueIn = entry.data;\n            }\n          })[entry.tagType] || noop).call(self);\n        },\n        uri: function uri() {\n          currentUri.uri = entry.uri;\n          uris.push(currentUri);\n\n          // if no explicit duration was declared, use the target duration\n          if (this.manifest.targetDuration && !('duration' in currentUri)) {\n            this.trigger('warn', {\n              message: 'defaulting segment duration to the target duration'\n            });\n            currentUri.duration = this.manifest.targetDuration;\n          }\n          // annotate with encryption information, if necessary\n          if (_key) {\n            currentUri.key = _key;\n          }\n          currentUri.timeline = currentTimeline;\n          // annotate with initialization segment information, if necessary\n          if (currentMap) {\n            currentUri.map = currentMap;\n          }\n\n          // prepare for the next URI\n          currentUri = {};\n        },\n        comment: function comment() {\n          // comments are not important for playback\n        }\n      })[entry.type].call(self);\n    });\n\n    return _this;\n  }\n\n  /**\n   * Parse the input string and update the manifest object.\n   *\n   * @param {String} chunk a potentially incomplete portion of the manifest\n   */\n\n\n  _createClass(Parser, [{\n    key: 'push',\n    value: function push(chunk) {\n      this.lineStream.push(chunk);\n    }\n\n    /**\n     * Flush any remaining input. This can be handy if the last line of an M3U8\n     * manifest did not contain a trailing newline but the file has been\n     * completely received.\n     */\n\n  }, {\n    key: 'end',\n    value: function end() {\n      // flush any buffered input\n      this.lineStream.push('\\n');\n    }\n  }]);\n\n  return Parser;\n}(_stream2['default']);\n\nexports['default'] = Parser;","var createHash = require('create-hash')\nvar Buffer = require('safe-buffer').Buffer\n\nmodule.exports = function (seed, len) {\n  var t = Buffer.alloc(0)\n  var i = 0\n  var c\n  while (t.length < len) {\n    c = i2ops(i++)\n    t = Buffer.concat([t, createHash('sha1').update(seed).update(c).digest()])\n  }\n  return t.slice(0, len)\n}\n\nfunction i2ops (c) {\n  var out = Buffer.allocUnsafe(4)\n  out.writeUInt32BE(c, 0)\n  return out\n}\n",";(function (root, factory, undef) {\n\tif (typeof exports === \"object\") {\n\t\t// CommonJS\n\t\tmodule.exports = exports = factory(require(\"./core\"), require(\"./cipher-core\"));\n\t}\n\telse if (typeof define === \"function\" && define.amd) {\n\t\t// AMD\n\t\tdefine([\"./core\", \"./cipher-core\"], factory);\n\t}\n\telse {\n\t\t// Global (browser)\n\t\tfactory(root.CryptoJS);\n\t}\n}(this, function (CryptoJS) {\n\n\t/**\n\t * Counter block mode.\n\t */\n\tCryptoJS.mode.CTR = (function () {\n\t    var CTR = CryptoJS.lib.BlockCipherMode.extend();\n\n\t    var Encryptor = CTR.Encryptor = CTR.extend({\n\t        processBlock: function (words, offset) {\n\t            // Shortcuts\n\t            var cipher = this._cipher\n\t            var blockSize = cipher.blockSize;\n\t            var iv = this._iv;\n\t            var counter = this._counter;\n\n\t            // Generate keystream\n\t            if (iv) {\n\t                counter = this._counter = iv.slice(0);\n\n\t                // Remove IV for subsequent blocks\n\t                this._iv = undefined;\n\t            }\n\t            var keystream = counter.slice(0);\n\t            cipher.encryptBlock(keystream, 0);\n\n\t            // Increment counter\n\t            counter[blockSize - 1] = (counter[blockSize - 1] + 1) | 0\n\n\t            // Encrypt\n\t            for (var i = 0; i < blockSize; i++) {\n\t                words[offset + i] ^= keystream[i];\n\t            }\n\t        }\n\t    });\n\n\t    CTR.Decryptor = Encryptor;\n\n\t    return CTR;\n\t}());\n\n\n\treturn CryptoJS.mode.CTR;\n\n}));","'use strict'\nvar inherits = require('inherits')\nvar HashBase = require('hash-base')\nvar Buffer = require('safe-buffer').Buffer\n\nvar ARRAY16 = new Array(16)\n\nfunction MD5 () {\n  HashBase.call(this, 64)\n\n  // state\n  this._a = 0x67452301\n  this._b = 0xefcdab89\n  this._c = 0x98badcfe\n  this._d = 0x10325476\n}\n\ninherits(MD5, HashBase)\n\nMD5.prototype._update = function () {\n  var M = ARRAY16\n  for (var i = 0; i < 16; ++i) M[i] = this._block.readInt32LE(i * 4)\n\n  var a = this._a\n  var b = this._b\n  var c = this._c\n  var d = this._d\n\n  a = fnF(a, b, c, d, M[0], 0xd76aa478, 7)\n  d = fnF(d, a, b, c, M[1], 0xe8c7b756, 12)\n  c = fnF(c, d, a, b, M[2], 0x242070db, 17)\n  b = fnF(b, c, d, a, M[3], 0xc1bdceee, 22)\n  a = fnF(a, b, c, d, M[4], 0xf57c0faf, 7)\n  d = fnF(d, a, b, c, M[5], 0x4787c62a, 12)\n  c = fnF(c, d, a, b, M[6], 0xa8304613, 17)\n  b = fnF(b, c, d, a, M[7], 0xfd469501, 22)\n  a = fnF(a, b, c, d, M[8], 0x698098d8, 7)\n  d = fnF(d, a, b, c, M[9], 0x8b44f7af, 12)\n  c = fnF(c, d, a, b, M[10], 0xffff5bb1, 17)\n  b = fnF(b, c, d, a, M[11], 0x895cd7be, 22)\n  a = fnF(a, b, c, d, M[12], 0x6b901122, 7)\n  d = fnF(d, a, b, c, M[13], 0xfd987193, 12)\n  c = fnF(c, d, a, b, M[14], 0xa679438e, 17)\n  b = fnF(b, c, d, a, M[15], 0x49b40821, 22)\n\n  a = fnG(a, b, c, d, M[1], 0xf61e2562, 5)\n  d = fnG(d, a, b, c, M[6], 0xc040b340, 9)\n  c = fnG(c, d, a, b, M[11], 0x265e5a51, 14)\n  b = fnG(b, c, d, a, M[0], 0xe9b6c7aa, 20)\n  a = fnG(a, b, c, d, M[5], 0xd62f105d, 5)\n  d = fnG(d, a, b, c, M[10], 0x02441453, 9)\n  c = fnG(c, d, a, b, M[15], 0xd8a1e681, 14)\n  b = fnG(b, c, d, a, M[4], 0xe7d3fbc8, 20)\n  a = fnG(a, b, c, d, M[9], 0x21e1cde6, 5)\n  d = fnG(d, a, b, c, M[14], 0xc33707d6, 9)\n  c = fnG(c, d, a, b, M[3], 0xf4d50d87, 14)\n  b = fnG(b, c, d, a, M[8], 0x455a14ed, 20)\n  a = fnG(a, b, c, d, M[13], 0xa9e3e905, 5)\n  d = fnG(d, a, b, c, M[2], 0xfcefa3f8, 9)\n  c = fnG(c, d, a, b, M[7], 0x676f02d9, 14)\n  b = fnG(b, c, d, a, M[12], 0x8d2a4c8a, 20)\n\n  a = fnH(a, b, c, d, M[5], 0xfffa3942, 4)\n  d = fnH(d, a, b, c, M[8], 0x8771f681, 11)\n  c = fnH(c, d, a, b, M[11], 0x6d9d6122, 16)\n  b = fnH(b, c, d, a, M[14], 0xfde5380c, 23)\n  a = fnH(a, b, c, d, M[1], 0xa4beea44, 4)\n  d = fnH(d, a, b, c, M[4], 0x4bdecfa9, 11)\n  c = fnH(c, d, a, b, M[7], 0xf6bb4b60, 16)\n  b = fnH(b, c, d, a, M[10], 0xbebfbc70, 23)\n  a = fnH(a, b, c, d, M[13], 0x289b7ec6, 4)\n  d = fnH(d, a, b, c, M[0], 0xeaa127fa, 11)\n  c = fnH(c, d, a, b, M[3], 0xd4ef3085, 16)\n  b = fnH(b, c, d, a, M[6], 0x04881d05, 23)\n  a = fnH(a, b, c, d, M[9], 0xd9d4d039, 4)\n  d = fnH(d, a, b, c, M[12], 0xe6db99e5, 11)\n  c = fnH(c, d, a, b, M[15], 0x1fa27cf8, 16)\n  b = fnH(b, c, d, a, M[2], 0xc4ac5665, 23)\n\n  a = fnI(a, b, c, d, M[0], 0xf4292244, 6)\n  d = fnI(d, a, b, c, M[7], 0x432aff97, 10)\n  c = fnI(c, d, a, b, M[14], 0xab9423a7, 15)\n  b = fnI(b, c, d, a, M[5], 0xfc93a039, 21)\n  a = fnI(a, b, c, d, M[12], 0x655b59c3, 6)\n  d = fnI(d, a, b, c, M[3], 0x8f0ccc92, 10)\n  c = fnI(c, d, a, b, M[10], 0xffeff47d, 15)\n  b = fnI(b, c, d, a, M[1], 0x85845dd1, 21)\n  a = fnI(a, b, c, d, M[8], 0x6fa87e4f, 6)\n  d = fnI(d, a, b, c, M[15], 0xfe2ce6e0, 10)\n  c = fnI(c, d, a, b, M[6], 0xa3014314, 15)\n  b = fnI(b, c, d, a, M[13], 0x4e0811a1, 21)\n  a = fnI(a, b, c, d, M[4], 0xf7537e82, 6)\n  d = fnI(d, a, b, c, M[11], 0xbd3af235, 10)\n  c = fnI(c, d, a, b, M[2], 0x2ad7d2bb, 15)\n  b = fnI(b, c, d, a, M[9], 0xeb86d391, 21)\n\n  this._a = (this._a + a) | 0\n  this._b = (this._b + b) | 0\n  this._c = (this._c + c) | 0\n  this._d = (this._d + d) | 0\n}\n\nMD5.prototype._digest = function () {\n  // create padding and handle blocks\n  this._block[this._blockOffset++] = 0x80\n  if (this._blockOffset > 56) {\n    this._block.fill(0, this._blockOffset, 64)\n    this._update()\n    this._blockOffset = 0\n  }\n\n  this._block.fill(0, this._blockOffset, 56)\n  this._block.writeUInt32LE(this._length[0], 56)\n  this._block.writeUInt32LE(this._length[1], 60)\n  this._update()\n\n  // produce result\n  var buffer = Buffer.allocUnsafe(16)\n  buffer.writeInt32LE(this._a, 0)\n  buffer.writeInt32LE(this._b, 4)\n  buffer.writeInt32LE(this._c, 8)\n  buffer.writeInt32LE(this._d, 12)\n  return buffer\n}\n\nfunction rotl (x, n) {\n  return (x << n) | (x >>> (32 - n))\n}\n\nfunction fnF (a, b, c, d, m, k, s) {\n  return (rotl((a + ((b & c) | ((~b) & d)) + m + k) | 0, s) + b) | 0\n}\n\nfunction fnG (a, b, c, d, m, k, s) {\n  return (rotl((a + ((b & d) | (c & (~d))) + m + k) | 0, s) + b) | 0\n}\n\nfunction fnH (a, b, c, d, m, k, s) {\n  return (rotl((a + (b ^ c ^ d) + m + k) | 0, s) + b) | 0\n}\n\nfunction fnI (a, b, c, d, m, k, s) {\n  return (rotl((a + ((c ^ (b | (~d)))) + m + k) | 0, s) + b) | 0\n}\n\nmodule.exports = MD5\n","var TO_STRING_TAG_SUPPORT = require('../internals/to-string-tag-support');\nvar classofRaw = require('../internals/classof-raw');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\n\nvar TO_STRING_TAG = wellKnownSymbol('toStringTag');\n// ES3 wrong here\nvar CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';\n\n// fallback for IE11 Script Access Denied error\nvar tryGet = function (it, key) {\n  try {\n    return it[key];\n  } catch (error) { /* empty */ }\n};\n\n// getting tag from ES6+ `Object.prototype.toString`\nmodule.exports = TO_STRING_TAG_SUPPORT ? classofRaw : function (it) {\n  var O, tag, result;\n  return it === undefined ? 'Undefined' : it === null ? 'Null'\n    // @@toStringTag case\n    : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG)) == 'string' ? tag\n    // builtinTag case\n    : CORRECT_ARGUMENTS ? classofRaw(O)\n    // ES3 arguments fallback\n    : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;\n};\n","/**\n * @file playback-watcher.js\n *\n * Playback starts, and now my watch begins. It shall not end until my death. I shall\n * take no wait, hold no uncleared timeouts, father no bad seeks. I shall wear no crowns\n * and win no glory. I shall live and die at my post. I am the corrector of the underflow.\n * I am the watcher of gaps. I am the shield that guards the realms of seekable. I pledge\n * my life and honor to the Playback Watch, for this Player and all the Players to come.\n */\n\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _ranges = require('./ranges');\n\nvar _ranges2 = _interopRequireDefault(_ranges);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\n// Set of events that reset the playback-watcher time check logic and clear the timeout\nvar timerCancelEvents = ['seeking', 'seeked', 'pause', 'playing', 'error'];\n\n/**\n * @class PlaybackWatcher\n */\n\nvar PlaybackWatcher = (function () {\n  /**\n   * Represents an PlaybackWatcher object.\n   * @constructor\n   * @param {object} options an object that includes the tech and settings\n   */\n\n  function PlaybackWatcher(options) {\n    var _this = this;\n\n    _classCallCheck(this, PlaybackWatcher);\n\n    this.tech_ = options.tech;\n    this.seekable = options.seekable;\n\n    this.consecutiveUpdates = 0;\n    this.lastRecordedTime = null;\n    this.timer_ = null;\n    this.checkCurrentTimeTimeout_ = null;\n\n    if (options.debug) {\n      this.logger_ = _videoJs2['default'].log.bind(_videoJs2['default'], 'playback-watcher ->');\n    }\n    this.logger_('initialize');\n\n    var canPlayHandler = function canPlayHandler() {\n      return _this.monitorCurrentTime_();\n    };\n    var waitingHandler = function waitingHandler() {\n      return _this.techWaiting_();\n    };\n    var cancelTimerHandler = function cancelTimerHandler() {\n      return _this.cancelTimer_();\n    };\n    var fixesBadSeeksHandler = function fixesBadSeeksHandler() {\n      return _this.fixesBadSeeks_();\n    };\n\n    this.tech_.on('seekablechanged', fixesBadSeeksHandler);\n    this.tech_.on('waiting', waitingHandler);\n    this.tech_.on(timerCancelEvents, cancelTimerHandler);\n    this.tech_.on('canplay', canPlayHandler);\n\n    // Define the dispose function to clean up our events\n    this.dispose = function () {\n      _this.logger_('dispose');\n      _this.tech_.off('seekablechanged', fixesBadSeeksHandler);\n      _this.tech_.off('waiting', waitingHandler);\n      _this.tech_.off(timerCancelEvents, cancelTimerHandler);\n      _this.tech_.off('canplay', canPlayHandler);\n      if (_this.checkCurrentTimeTimeout_) {\n        _globalWindow2['default'].clearTimeout(_this.checkCurrentTimeTimeout_);\n      }\n      _this.cancelTimer_();\n    };\n  }\n\n  /**\n   * Periodically check current time to see if playback stopped\n   *\n   * @private\n   */\n\n  _createClass(PlaybackWatcher, [{\n    key: 'monitorCurrentTime_',\n    value: function monitorCurrentTime_() {\n      this.checkCurrentTime_();\n\n      if (this.checkCurrentTimeTimeout_) {\n        _globalWindow2['default'].clearTimeout(this.checkCurrentTimeTimeout_);\n      }\n\n      // 42 = 24 fps // 250 is what Webkit uses // FF uses 15\n      this.checkCurrentTimeTimeout_ = _globalWindow2['default'].setTimeout(this.monitorCurrentTime_.bind(this), 250);\n    }\n\n    /**\n     * The purpose of this function is to emulate the \"waiting\" event on\n     * browsers that do not emit it when they are waiting for more\n     * data to continue playback\n     *\n     * @private\n     */\n  }, {\n    key: 'checkCurrentTime_',\n    value: function checkCurrentTime_() {\n      if (this.tech_.seeking() && this.fixesBadSeeks_()) {\n        this.consecutiveUpdates = 0;\n        this.lastRecordedTime = this.tech_.currentTime();\n        return;\n      }\n\n      if (this.tech_.paused() || this.tech_.seeking()) {\n        return;\n      }\n\n      var currentTime = this.tech_.currentTime();\n      var buffered = this.tech_.buffered();\n\n      if (this.lastRecordedTime === currentTime && (!buffered.length || currentTime + _ranges2['default'].SAFE_TIME_DELTA >= buffered.end(buffered.length - 1))) {\n        // If current time is at the end of the final buffered region, then any playback\n        // stall is most likely caused by buffering in a low bandwidth environment. The tech\n        // should fire a `waiting` event in this scenario, but due to browser and tech\n        // inconsistencies (e.g. The Flash tech does not fire a `waiting` event when the end\n        // of the buffer is reached and has fallen off the live window). Calling\n        // `techWaiting_` here allows us to simulate responding to a native `waiting` event\n        // when the tech fails to emit one.\n        return this.techWaiting_();\n      }\n\n      if (this.consecutiveUpdates >= 5 && currentTime === this.lastRecordedTime) {\n        this.consecutiveUpdates++;\n        this.waiting_();\n      } else if (currentTime === this.lastRecordedTime) {\n        this.consecutiveUpdates++;\n      } else {\n        this.consecutiveUpdates = 0;\n        this.lastRecordedTime = currentTime;\n      }\n    }\n\n    /**\n     * Cancels any pending timers and resets the 'timeupdate' mechanism\n     * designed to detect that we are stalled\n     *\n     * @private\n     */\n  }, {\n    key: 'cancelTimer_',\n    value: function cancelTimer_() {\n      this.consecutiveUpdates = 0;\n\n      if (this.timer_) {\n        this.logger_('cancelTimer_');\n        clearTimeout(this.timer_);\n      }\n\n      this.timer_ = null;\n    }\n\n    /**\n     * Fixes situations where there's a bad seek\n     *\n     * @return {Boolean} whether an action was taken to fix the seek\n     * @private\n     */\n  }, {\n    key: 'fixesBadSeeks_',\n    value: function fixesBadSeeks_() {\n      var seeking = this.tech_.seeking();\n      var seekable = this.seekable();\n      var currentTime = this.tech_.currentTime();\n      var seekTo = undefined;\n\n      if (seeking && this.afterSeekableWindow_(seekable, currentTime)) {\n        var seekableEnd = seekable.end(seekable.length - 1);\n\n        // sync to live point (if VOD, our seekable was updated and we're simply adjusting)\n        seekTo = seekableEnd;\n      }\n\n      if (seeking && this.beforeSeekableWindow_(seekable, currentTime)) {\n        var seekableStart = seekable.start(0);\n\n        // sync to the beginning of the live window\n        // provide a buffer of .1 seconds to handle rounding/imprecise numbers\n        seekTo = seekableStart + _ranges2['default'].SAFE_TIME_DELTA;\n      }\n\n      if (typeof seekTo !== 'undefined') {\n        this.logger_('Trying to seek outside of seekable at time ' + currentTime + ' with ' + ('seekable range ' + _ranges2['default'].printableRange(seekable) + '. Seeking to ') + (seekTo + '.'));\n\n        this.tech_.setCurrentTime(seekTo);\n        return true;\n      }\n\n      return false;\n    }\n\n    /**\n     * Handler for situations when we determine the player is waiting.\n     *\n     * @private\n     */\n  }, {\n    key: 'waiting_',\n    value: function waiting_() {\n      if (this.techWaiting_()) {\n        return;\n      }\n\n      // All tech waiting checks failed. Use last resort correction\n      var currentTime = this.tech_.currentTime();\n      var buffered = this.tech_.buffered();\n      var currentRange = _ranges2['default'].findRange(buffered, currentTime);\n\n      // Sometimes the player can stall for unknown reasons within a contiguous buffered\n      // region with no indication that anything is amiss (seen in Firefox). Seeking to\n      // currentTime is usually enough to kickstart the player. This checks that the player\n      // is currently within a buffered region before attempting a corrective seek.\n      // Chrome does not appear to continue `timeupdate` events after a `waiting` event\n      // until there is ~ 3 seconds of forward buffer available. PlaybackWatcher should also\n      // make sure there is ~3 seconds of forward buffer before taking any corrective action\n      // to avoid triggering an `unknownwaiting` event when the network is slow.\n      if (currentRange.length && currentTime + 3 <= currentRange.end(0)) {\n        this.cancelTimer_();\n        this.tech_.setCurrentTime(currentTime);\n\n        this.logger_('Stopped at ' + currentTime + ' while inside a buffered region ' + ('[' + currentRange.start(0) + ' -> ' + currentRange.end(0) + ']. Attempting to resume ') + 'playback by seeking to the current time.');\n\n        // unknown waiting corrections may be useful for monitoring QoS\n        this.tech_.trigger({ type: 'usage', name: 'hls-unknown-waiting' });\n        return;\n      }\n    }\n\n    /**\n     * Handler for situations when the tech fires a `waiting` event\n     *\n     * @return {Boolean}\n     *         True if an action (or none) was needed to correct the waiting. False if no\n     *         checks passed\n     * @private\n     */\n  }, {\n    key: 'techWaiting_',\n    value: function techWaiting_() {\n      var seekable = this.seekable();\n      var currentTime = this.tech_.currentTime();\n\n      if (this.tech_.seeking() && this.fixesBadSeeks_()) {\n        // Tech is seeking or bad seek fixed, no action needed\n        return true;\n      }\n\n      if (this.tech_.seeking() || this.timer_ !== null) {\n        // Tech is seeking or already waiting on another action, no action needed\n        return true;\n      }\n\n      if (this.beforeSeekableWindow_(seekable, currentTime)) {\n        var livePoint = seekable.end(seekable.length - 1);\n\n        this.logger_('Fell out of live window at time ' + currentTime + '. Seeking to ' + ('live point (seekable end) ' + livePoint));\n        this.cancelTimer_();\n        this.tech_.setCurrentTime(livePoint);\n\n        // live window resyncs may be useful for monitoring QoS\n        this.tech_.trigger({ type: 'usage', name: 'hls-live-resync' });\n        return true;\n      }\n\n      var buffered = this.tech_.buffered();\n      var nextRange = _ranges2['default'].findNextRange(buffered, currentTime);\n\n      if (this.videoUnderflow_(nextRange, buffered, currentTime)) {\n        // Even though the video underflowed and was stuck in a gap, the audio overplayed\n        // the gap, leading currentTime into a buffered range. Seeking to currentTime\n        // allows the video to catch up to the audio position without losing any audio\n        // (only suffering ~3 seconds of frozen video and a pause in audio playback).\n        this.cancelTimer_();\n        this.tech_.setCurrentTime(currentTime);\n\n        // video underflow may be useful for monitoring QoS\n        this.tech_.trigger({ type: 'usage', name: 'hls-video-underflow' });\n        return true;\n      }\n\n      // check for gap\n      if (nextRange.length > 0) {\n        var difference = nextRange.start(0) - currentTime;\n\n        this.logger_('Stopped at ' + currentTime + ', setting timer for ' + difference + ', seeking ' + ('to ' + nextRange.start(0)));\n\n        this.timer_ = setTimeout(this.skipTheGap_.bind(this), difference * 1000, currentTime);\n        return true;\n      }\n\n      // All checks failed. Returning false to indicate failure to correct waiting\n      return false;\n    }\n  }, {\n    key: 'afterSeekableWindow_',\n    value: function afterSeekableWindow_(seekable, currentTime) {\n      if (!seekable.length) {\n        // we can't make a solid case if there's no seekable, default to false\n        return false;\n      }\n\n      if (currentTime > seekable.end(seekable.length - 1) + _ranges2['default'].SAFE_TIME_DELTA) {\n        return true;\n      }\n\n      return false;\n    }\n  }, {\n    key: 'beforeSeekableWindow_',\n    value: function beforeSeekableWindow_(seekable, currentTime) {\n      if (seekable.length &&\n      // can't fall before 0 and 0 seekable start identifies VOD stream\n      seekable.start(0) > 0 && currentTime < seekable.start(0) - _ranges2['default'].SAFE_TIME_DELTA) {\n        return true;\n      }\n\n      return false;\n    }\n  }, {\n    key: 'videoUnderflow_',\n    value: function videoUnderflow_(nextRange, buffered, currentTime) {\n      if (nextRange.length === 0) {\n        // Even if there is no available next range, there is still a possibility we are\n        // stuck in a gap due to video underflow.\n        var gap = this.gapFromVideoUnderflow_(buffered, currentTime);\n\n        if (gap) {\n          this.logger_('Encountered a gap in video from ' + gap.start + ' to ' + gap.end + '. ' + ('Seeking to current time ' + currentTime));\n\n          return true;\n        }\n      }\n\n      return false;\n    }\n\n    /**\n     * Timer callback. If playback still has not proceeded, then we seek\n     * to the start of the next buffered region.\n     *\n     * @private\n     */\n  }, {\n    key: 'skipTheGap_',\n    value: function skipTheGap_(scheduledCurrentTime) {\n      var buffered = this.tech_.buffered();\n      var currentTime = this.tech_.currentTime();\n      var nextRange = _ranges2['default'].findNextRange(buffered, currentTime);\n\n      this.cancelTimer_();\n\n      if (nextRange.length === 0 || currentTime !== scheduledCurrentTime) {\n        return;\n      }\n\n      this.logger_('skipTheGap_:', 'currentTime:', currentTime, 'scheduled currentTime:', scheduledCurrentTime, 'nextRange start:', nextRange.start(0));\n\n      // only seek if we still have not played\n      this.tech_.setCurrentTime(nextRange.start(0) + _ranges2['default'].TIME_FUDGE_FACTOR);\n\n      this.tech_.trigger({ type: 'usage', name: 'hls-gap-skip' });\n    }\n  }, {\n    key: 'gapFromVideoUnderflow_',\n    value: function gapFromVideoUnderflow_(buffered, currentTime) {\n      // At least in Chrome, if there is a gap in the video buffer, the audio will continue\n      // playing for ~3 seconds after the video gap starts. This is done to account for\n      // video buffer underflow/underrun (note that this is not done when there is audio\n      // buffer underflow/underrun -- in that case the video will stop as soon as it\n      // encounters the gap, as audio stalls are more noticeable/jarring to a user than\n      // video stalls). The player's time will reflect the playthrough of audio, so the\n      // time will appear as if we are in a buffered region, even if we are stuck in a\n      // \"gap.\"\n      //\n      // Example:\n      // video buffer:   0 => 10.1, 10.2 => 20\n      // audio buffer:   0 => 20\n      // overall buffer: 0 => 10.1, 10.2 => 20\n      // current time: 13\n      //\n      // Chrome's video froze at 10 seconds, where the video buffer encountered the gap,\n      // however, the audio continued playing until it reached ~3 seconds past the gap\n      // (13 seconds), at which point it stops as well. Since current time is past the\n      // gap, findNextRange will return no ranges.\n      //\n      // To check for this issue, we see if there is a gap that starts somewhere within\n      // a 3 second range (3 seconds +/- 1 second) back from our current time.\n      var gaps = _ranges2['default'].findGaps(buffered);\n\n      for (var i = 0; i < gaps.length; i++) {\n        var start = gaps.start(i);\n        var end = gaps.end(i);\n\n        // gap is starts no more than 4 seconds back\n        if (currentTime - start < 4 && currentTime - start > 2) {\n          return {\n            start: start,\n            end: end\n          };\n        }\n      }\n\n      return null;\n    }\n\n    /**\n     * A debugging logger noop that is set to console.log only if debugging\n     * is enabled globally\n     *\n     * @private\n     */\n  }, {\n    key: 'logger_',\n    value: function logger_() {}\n  }]);\n\n  return PlaybackWatcher;\n})();\n\nexports['default'] = PlaybackWatcher;\nmodule.exports = exports['default'];","var shared = require('../internals/shared');\nvar uid = require('../internals/uid');\n\nvar keys = shared('keys');\n\nmodule.exports = function (key) {\n  return keys[key] || (keys[key] = uid(key));\n};\n","/**\n * @file segment-loader.js\n */\n'use strict';\n\nObject.defineProperty(exports, '__esModule', {\n  value: true\n});\n\nvar _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();\n\nvar _get = function get(_x4, _x5, _x6) { var _again = true; _function: while (_again) { var object = _x4, property = _x5, receiver = _x6; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x4 = parent; _x5 = property; _x6 = receiver; _again = true; desc = parent = undefined; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }\n\nvar _playlist = require('./playlist');\n\nvar _playlist2 = _interopRequireDefault(_playlist);\n\nvar _videoJs = require('video.js');\n\nvar _videoJs2 = _interopRequireDefault(_videoJs);\n\nvar _sourceUpdater = require('./source-updater');\n\nvar _sourceUpdater2 = _interopRequireDefault(_sourceUpdater);\n\nvar _config = require('./config');\n\nvar _config2 = _interopRequireDefault(_config);\n\nvar _globalWindow = require('global/window');\n\nvar _globalWindow2 = _interopRequireDefault(_globalWindow);\n\nvar _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs = require('videojs-contrib-media-sources/es5/remove-cues-from-track.js');\n\nvar _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2 = _interopRequireDefault(_videojsContribMediaSourcesEs5RemoveCuesFromTrackJs);\n\nvar _binUtils = require('./bin-utils');\n\nvar _mediaSegmentRequest = require('./media-segment-request');\n\nvar _ranges = require('./ranges');\n\nvar _playlistSelectors = require('./playlist-selectors');\n\n// in ms\nvar CHECK_BUFFER_DELAY = 500;\n\n/**\n * Determines if we should call endOfStream on the media source based\n * on the state of the buffer or if appened segment was the final\n * segment in the playlist.\n *\n * @param {Object} playlist a media playlist object\n * @param {Object} mediaSource the MediaSource object\n * @param {Number} segmentIndex the index of segment we last appended\n * @returns {Boolean} do we need to call endOfStream on the MediaSource\n */\nvar detectEndOfStream = function detectEndOfStream(playlist, mediaSource, segmentIndex) {\n  if (!playlist || !mediaSource) {\n    return false;\n  }\n\n  var segments = playlist.segments;\n\n  // determine a few boolean values to help make the branch below easier\n  // to read\n  var appendedLastSegment = segmentIndex === segments.length;\n\n  // if we've buffered to the end of the video, we need to call endOfStream\n  // so that MediaSources can trigger the `ended` event when it runs out of\n  // buffered data instead of waiting for me\n  return playlist.endList && mediaSource.readyState === 'open' && appendedLastSegment;\n};\n\nvar finite = function finite(num) {\n  return typeof num === 'number' && isFinite(num);\n};\n\nvar illegalMediaSwitch = function illegalMediaSwitch(loaderType, startingMedia, newSegmentMedia) {\n  // Although these checks should most likely cover non 'main' types, for now it narrows\n  // the scope of our checks.\n  if (loaderType !== 'main' || !startingMedia || !newSegmentMedia) {\n    return null;\n  }\n\n  if (!newSegmentMedia.containsAudio && !newSegmentMedia.containsVideo) {\n    return 'Neither audio nor video found in segment.';\n  }\n\n  if (startingMedia.containsVideo && !newSegmentMedia.containsVideo) {\n    return 'Only audio found in segment when we expected video.' + ' We can\\'t switch to audio only from a stream that had video.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  if (!startingMedia.containsVideo && newSegmentMedia.containsVideo) {\n    return 'Video found in segment when we expected only audio.' + ' We can\\'t switch to a stream with video from an audio only stream.' + ' To get rid of this message, please add codec information to the manifest.';\n  }\n\n  return null;\n};\n\nexports.illegalMediaSwitch = illegalMediaSwitch;\n/**\n * Calculates a time value that is safe to remove from the back buffer without interupting\n * playback.\n *\n * @param {TimeRange} seekable\n *        The current seekable range\n * @param {Number} currentTime\n *        The current time of the player\n * @param {Number} targetDuration\n *        The target duration of the current playlist\n * @return {Number}\n *         Time that is safe to remove from the back buffer without interupting playback\n */\nvar safeBackBufferTrimTime = function safeBackBufferTrimTime(seekable, currentTime, targetDuration) {\n  var removeToTime = undefined;\n\n  if (seekable.length && seekable.start(0) > 0 && seekable.start(0) < currentTime) {\n    // If we have a seekable range use that as the limit for what can be removed safely\n    removeToTime = seekable.start(0);\n  } else {\n    // otherwise remove anything older than 30 seconds before the current play head\n    removeToTime = currentTime - 30;\n  }\n\n  // Don't allow removing from the buffer within target duration of current time\n  // to avoid the possibility of removing the GOP currently being played which could\n  // cause playback stalls.\n  return Math.min(removeToTime, currentTime - targetDuration);\n};\n\nexports.safeBackBufferTrimTime = safeBackBufferTrimTime;\n/**\n * An object that manages segment loading and appending.\n *\n * @class SegmentLoader\n * @param {Object} options required and optional options\n * @extends videojs.EventTarget\n */\n\nvar SegmentLoader = (function (_videojs$EventTarget) {\n  _inherits(SegmentLoader, _videojs$EventTarget);\n\n  function SegmentLoader(settings) {\n    var _this = this;\n\n    var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];\n\n    _classCallCheck(this, SegmentLoader);\n\n    _get(Object.getPrototypeOf(SegmentLoader.prototype), 'constructor', this).call(this);\n    // check pre-conditions\n    if (!settings) {\n      throw new TypeError('Initialization settings are required');\n    }\n    if (typeof settings.currentTime !== 'function') {\n      throw new TypeError('No currentTime getter specified');\n    }\n    if (!settings.mediaSource) {\n      throw new TypeError('No MediaSource specified');\n    }\n    // public properties\n    this.state = 'INIT';\n    this.bandwidth = settings.bandwidth;\n    this.throughput = { rate: 0, count: 0 };\n    this.roundTrip = NaN;\n    this.resetStats_();\n    this.mediaIndex = null;\n\n    // private settings\n    this.hasPlayed_ = settings.hasPlayed;\n    this.currentTime_ = settings.currentTime;\n    this.seekable_ = settings.seekable;\n    this.seeking_ = settings.seeking;\n    this.duration_ = settings.duration;\n    this.mediaSource_ = settings.mediaSource;\n    this.hls_ = settings.hls;\n    this.loaderType_ = settings.loaderType;\n    this.startingMedia_ = void 0;\n    this.segmentMetadataTrack_ = settings.segmentMetadataTrack;\n    this.goalBufferLength_ = settings.goalBufferLength;\n\n    // private instance variables\n    this.checkBufferTimeout_ = null;\n    this.error_ = void 0;\n    this.currentTimeline_ = -1;\n    this.pendingSegment_ = null;\n    this.mimeType_ = null;\n    this.sourceUpdater_ = null;\n    this.xhrOptions_ = null;\n\n    // Fragmented mp4 playback\n    this.activeInitSegmentId_ = null;\n    this.initSegments_ = {};\n\n    this.decrypter_ = settings.decrypter;\n\n    // Manages the tracking and generation of sync-points, mappings\n    // between a time in the display time and a segment index within\n    // a playlist\n    this.syncController_ = settings.syncController;\n    this.syncPoint_ = {\n      segmentIndex: 0,\n      time: 0\n    };\n\n    this.syncController_.on('syncinfoupdate', function () {\n      return _this.trigger('syncinfoupdate');\n    });\n\n    this.mediaSource_.addEventListener('sourceopen', function () {\n      return _this.ended_ = false;\n    });\n\n    // ...for determining the fetch location\n    this.fetchAtBuffer_ = false;\n\n    if (options.debug) {\n      this.logger_ = _videoJs2['default'].log.bind(_videoJs2['default'], 'segment-loader', this.loaderType_, '->');\n    }\n  }\n\n  /**\n   * reset all of our media stats\n   *\n   * @private\n   */\n\n  _createClass(SegmentLoader, [{\n    key: 'resetStats_',\n    value: function resetStats_() {\n      this.mediaBytesTransferred = 0;\n      this.mediaRequests = 0;\n      this.mediaRequestsAborted = 0;\n      this.mediaRequestsTimedout = 0;\n      this.mediaRequestsErrored = 0;\n      this.mediaTransferDuration = 0;\n      this.mediaSecondsLoaded = 0;\n    }\n\n    /**\n     * dispose of the SegmentLoader and reset to the default state\n     */\n  }, {\n    key: 'dispose',\n    value: function dispose() {\n      this.state = 'DISPOSED';\n      this.pause();\n      this.abort_();\n      if (this.sourceUpdater_) {\n        this.sourceUpdater_.dispose();\n      }\n      this.resetStats_();\n    }\n\n    /**\n     * abort anything that is currently doing on with the SegmentLoader\n     * and reset to a default state\n     */\n  }, {\n    key: 'abort',\n    value: function abort() {\n      if (this.state !== 'WAITING') {\n        if (this.pendingSegment_) {\n          this.pendingSegment_ = null;\n        }\n        return;\n      }\n\n      this.abort_();\n\n      // We aborted the requests we were waiting on, so reset the loader's state to READY\n      // since we are no longer \"waiting\" on any requests. XHR callback is not always run\n      // when the request is aborted. This will prevent the loader from being stuck in the\n      // WAITING state indefinitely.\n      this.state = 'READY';\n\n      // don't wait for buffer check timeouts to begin fetching the\n      // next segment\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n    }\n\n    /**\n     * abort all pending xhr requests and null any pending segements\n     *\n     * @private\n     */\n  }, {\n    key: 'abort_',\n    value: function abort_() {\n      if (this.pendingSegment_) {\n        this.pendingSegment_.abortRequests();\n      }\n\n      // clear out the segment being processed\n      this.pendingSegment_ = null;\n    }\n\n    /**\n     * set an error on the segment loader and null out any pending segements\n     *\n     * @param {Error} error the error to set on the SegmentLoader\n     * @return {Error} the error that was set or that is currently set\n     */\n  }, {\n    key: 'error',\n    value: function error(_error) {\n      if (typeof _error !== 'undefined') {\n        this.error_ = _error;\n      }\n\n      this.pendingSegment_ = null;\n      return this.error_;\n    }\n  }, {\n    key: 'endOfStream',\n    value: function endOfStream() {\n      this.ended_ = true;\n      this.pause();\n      this.trigger('ended');\n    }\n\n    /**\n     * Indicates which time ranges are buffered\n     *\n     * @return {TimeRange}\n     *         TimeRange object representing the current buffered ranges\n     */\n  }, {\n    key: 'buffered_',\n    value: function buffered_() {\n      if (!this.sourceUpdater_) {\n        return _videoJs2['default'].createTimeRanges();\n      }\n\n      return this.sourceUpdater_.buffered();\n    }\n\n    /**\n     * Gets and sets init segment for the provided map\n     *\n     * @param {Object} map\n     *        The map object representing the init segment to get or set\n     * @param {Boolean=} set\n     *        If true, the init segment for the provided map should be saved\n     * @return {Object}\n     *         map object for desired init segment\n     */\n  }, {\n    key: 'initSegment',\n    value: function initSegment(map) {\n      var set = arguments.length <= 1 || arguments[1] === undefined ? false : arguments[1];\n\n      if (!map) {\n        return null;\n      }\n\n      var id = (0, _binUtils.initSegmentId)(map);\n      var storedMap = this.initSegments_[id];\n\n      if (set && !storedMap && map.bytes) {\n        this.initSegments_[id] = storedMap = {\n          resolvedUri: map.resolvedUri,\n          byterange: map.byterange,\n          bytes: map.bytes\n        };\n      }\n\n      return storedMap || map;\n    }\n\n    /**\n     * Returns true if all configuration required for loading is present, otherwise false.\n     *\n     * @return {Boolean} True if the all configuration is ready for loading\n     * @private\n     */\n  }, {\n    key: 'couldBeginLoading_',\n    value: function couldBeginLoading_() {\n      return this.playlist_ && (\n      // the source updater is created when init_ is called, so either having a\n      // source updater or being in the INIT state with a mimeType is enough\n      // to say we have all the needed configuration to start loading.\n      this.sourceUpdater_ || this.mimeType_ && this.state === 'INIT') && !this.paused();\n    }\n\n    /**\n     * load a playlist and start to fill the buffer\n     */\n  }, {\n    key: 'load',\n    value: function load() {\n      // un-pause\n      this.monitorBuffer_();\n\n      // if we don't have a playlist yet, keep waiting for one to be\n      // specified\n      if (!this.playlist_) {\n        return;\n      }\n\n      // not sure if this is the best place for this\n      this.syncController_.setDateTimeMapping(this.playlist_);\n\n      // if all the configuration is ready, initialize and begin loading\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        return this.init_();\n      }\n\n      // if we're in the middle of processing a segment already, don't\n      // kick off an additional segment request\n      if (!this.couldBeginLoading_() || this.state !== 'READY' && this.state !== 'INIT') {\n        return;\n      }\n\n      this.state = 'READY';\n    }\n\n    /**\n     * Once all the starting parameters have been specified, begin\n     * operation. This method should only be invoked from the INIT\n     * state.\n     *\n     * @private\n     */\n  }, {\n    key: 'init_',\n    value: function init_() {\n      this.state = 'READY';\n      this.sourceUpdater_ = new _sourceUpdater2['default'](this.mediaSource_, this.mimeType_);\n      this.resetEverything();\n      return this.monitorBuffer_();\n    }\n\n    /**\n     * set a playlist on the segment loader\n     *\n     * @param {PlaylistLoader} media the playlist to set on the segment loader\n     */\n  }, {\n    key: 'playlist',\n    value: function playlist(newPlaylist) {\n      var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];\n\n      if (!newPlaylist) {\n        return;\n      }\n\n      var oldPlaylist = this.playlist_;\n      var segmentInfo = this.pendingSegment_;\n\n      this.playlist_ = newPlaylist;\n      this.xhrOptions_ = options;\n\n      // when we haven't started playing yet, the start of a live playlist\n      // is always our zero-time so force a sync update each time the playlist\n      // is refreshed from the server\n      if (!this.hasPlayed_()) {\n        newPlaylist.syncInfo = {\n          mediaSequence: newPlaylist.mediaSequence,\n          time: 0\n        };\n      }\n\n      // in VOD, this is always a rendition switch (or we updated our syncInfo above)\n      // in LIVE, we always want to update with new playlists (including refreshes)\n      this.trigger('syncinfoupdate');\n\n      // if we were unpaused but waiting for a playlist, start\n      // buffering now\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        return this.init_();\n      }\n\n      if (!oldPlaylist || oldPlaylist.uri !== newPlaylist.uri) {\n        if (this.mediaIndex !== null) {\n          // we must \"resync\" the segment loader when we switch renditions and\n          // the segment loader is already synced to the previous rendition\n          this.resyncLoader();\n        }\n\n        // the rest of this function depends on `oldPlaylist` being defined\n        return;\n      }\n\n      // we reloaded the same playlist so we are in a live scenario\n      // and we will likely need to adjust the mediaIndex\n      var mediaSequenceDiff = newPlaylist.mediaSequence - oldPlaylist.mediaSequence;\n\n      this.logger_('mediaSequenceDiff', mediaSequenceDiff);\n\n      // update the mediaIndex on the SegmentLoader\n      // this is important because we can abort a request and this value must be\n      // equal to the last appended mediaIndex\n      if (this.mediaIndex !== null) {\n        this.mediaIndex -= mediaSequenceDiff;\n      }\n\n      // update the mediaIndex on the SegmentInfo object\n      // this is important because we will update this.mediaIndex with this value\n      // in `handleUpdateEnd_` after the segment has been successfully appended\n      if (segmentInfo) {\n        segmentInfo.mediaIndex -= mediaSequenceDiff;\n\n        // we need to update the referenced segment so that timing information is\n        // saved for the new playlist's segment, however, if the segment fell off the\n        // playlist, we can leave the old reference and just lose the timing info\n        if (segmentInfo.mediaIndex >= 0) {\n          segmentInfo.segment = newPlaylist.segments[segmentInfo.mediaIndex];\n        }\n      }\n\n      this.syncController_.saveExpiredSegmentInfo(oldPlaylist, newPlaylist);\n    }\n\n    /**\n     * Prevent the loader from fetching additional segments. If there\n     * is a segment request outstanding, it will finish processing\n     * before the loader halts. A segment loader can be unpaused by\n     * calling load().\n     */\n  }, {\n    key: 'pause',\n    value: function pause() {\n      if (this.checkBufferTimeout_) {\n        _globalWindow2['default'].clearTimeout(this.checkBufferTimeout_);\n\n        this.checkBufferTimeout_ = null;\n      }\n    }\n\n    /**\n     * Returns whether the segment loader is fetching additional\n     * segments when given the opportunity. This property can be\n     * modified through calls to pause() and load().\n     */\n  }, {\n    key: 'paused',\n    value: function paused() {\n      return this.checkBufferTimeout_ === null;\n    }\n\n    /**\n     * create/set the following mimetype on the SourceBuffer through a\n     * SourceUpdater\n     *\n     * @param {String} mimeType the mime type string to use\n     */\n  }, {\n    key: 'mimeType',\n    value: function mimeType(_mimeType) {\n      if (this.mimeType_) {\n        return;\n      }\n\n      this.mimeType_ = _mimeType;\n      // if we were unpaused but waiting for a sourceUpdater, start\n      // buffering now\n      if (this.state === 'INIT' && this.couldBeginLoading_()) {\n        this.init_();\n      }\n    }\n\n    /**\n     * Delete all the buffered data and reset the SegmentLoader\n     */\n  }, {\n    key: 'resetEverything',\n    value: function resetEverything() {\n      this.ended_ = false;\n      this.resetLoader();\n      this.remove(0, this.duration_());\n      this.trigger('reseteverything');\n    }\n\n    /**\n     * Force the SegmentLoader to resync and start loading around the currentTime instead\n     * of starting at the end of the buffer\n     *\n     * Useful for fast quality changes\n     */\n  }, {\n    key: 'resetLoader',\n    value: function resetLoader() {\n      this.fetchAtBuffer_ = false;\n      this.resyncLoader();\n    }\n\n    /**\n     * Force the SegmentLoader to restart synchronization and make a conservative guess\n     * before returning to the simple walk-forward method\n     */\n  }, {\n    key: 'resyncLoader',\n    value: function resyncLoader() {\n      this.mediaIndex = null;\n      this.syncPoint_ = null;\n      this.abort();\n    }\n\n    /**\n     * Remove any data in the source buffer between start and end times\n     * @param {Number} start - the start time of the region to remove from the buffer\n     * @param {Number} end - the end time of the region to remove from the buffer\n     */\n  }, {\n    key: 'remove',\n    value: function remove(start, end) {\n      if (this.sourceUpdater_) {\n        this.sourceUpdater_.remove(start, end);\n      }\n      (0, _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2['default'])(start, end, this.segmentMetadataTrack_);\n    }\n\n    /**\n     * (re-)schedule monitorBufferTick_ to run as soon as possible\n     *\n     * @private\n     */\n  }, {\n    key: 'monitorBuffer_',\n    value: function monitorBuffer_() {\n      if (this.checkBufferTimeout_) {\n        _globalWindow2['default'].clearTimeout(this.checkBufferTimeout_);\n      }\n\n      this.checkBufferTimeout_ = _globalWindow2['default'].setTimeout(this.monitorBufferTick_.bind(this), 1);\n    }\n\n    /**\n     * As long as the SegmentLoader is in the READY state, periodically\n     * invoke fillBuffer_().\n     *\n     * @private\n     */\n  }, {\n    key: 'monitorBufferTick_',\n    value: function monitorBufferTick_() {\n      if (this.state === 'READY') {\n        this.fillBuffer_();\n      }\n\n      if (this.checkBufferTimeout_) {\n        _globalWindow2['default'].clearTimeout(this.checkBufferTimeout_);\n      }\n\n      this.checkBufferTimeout_ = _globalWindow2['default'].setTimeout(this.monitorBufferTick_.bind(this), CHECK_BUFFER_DELAY);\n    }\n\n    /**\n     * fill the buffer with segements unless the sourceBuffers are\n     * currently updating\n     *\n     * Note: this function should only ever be called by monitorBuffer_\n     * and never directly\n     *\n     * @private\n     */\n  }, {\n    key: 'fillBuffer_',\n    value: function fillBuffer_() {\n      if (this.sourceUpdater_.updating()) {\n        return;\n      }\n\n      if (!this.syncPoint_) {\n        this.syncPoint_ = this.syncController_.getSyncPoint(this.playlist_, this.duration_(), this.currentTimeline_, this.currentTime_());\n      }\n\n      // see if we need to begin loading immediately\n      var segmentInfo = this.checkBuffer_(this.buffered_(), this.playlist_, this.mediaIndex, this.hasPlayed_(), this.currentTime_(), this.syncPoint_);\n\n      if (!segmentInfo) {\n        return;\n      }\n\n      var isEndOfStream = detectEndOfStream(this.playlist_, this.mediaSource_, segmentInfo.mediaIndex);\n\n      if (isEndOfStream) {\n        this.endOfStream();\n        return;\n      }\n\n      if (segmentInfo.mediaIndex === this.playlist_.segments.length - 1 && this.mediaSource_.readyState === 'ended' && !this.seeking_()) {\n        return;\n      }\n\n      // We will need to change timestampOffset of the sourceBuffer if either of\n      // the following conditions are true:\n      // - The segment.timeline !== this.currentTimeline\n      //   (we are crossing a discontinuity somehow)\n      // - The \"timestampOffset\" for the start of this segment is less than\n      //   the currently set timestampOffset\n      if (segmentInfo.timeline !== this.currentTimeline_ || segmentInfo.startOfSegment !== null && segmentInfo.startOfSegment < this.sourceUpdater_.timestampOffset()) {\n        this.syncController_.reset();\n        segmentInfo.timestampOffset = segmentInfo.startOfSegment;\n      }\n\n      this.loadSegment_(segmentInfo);\n    }\n\n    /**\n     * Determines what segment request should be made, given current playback\n     * state.\n     *\n     * @param {TimeRanges} buffered - the state of the buffer\n     * @param {Object} playlist - the playlist object to fetch segments from\n     * @param {Number} mediaIndex - the previous mediaIndex fetched or null\n     * @param {Boolean} hasPlayed - a flag indicating whether we have played or not\n     * @param {Number} currentTime - the playback position in seconds\n     * @param {Object} syncPoint - a segment info object that describes the\n     * @returns {Object} a segment request object that describes the segment to load\n     */\n  }, {\n    key: 'checkBuffer_',\n    value: function checkBuffer_(buffered, playlist, mediaIndex, hasPlayed, currentTime, syncPoint) {\n      var lastBufferedEnd = 0;\n      var startOfSegment = undefined;\n\n      if (buffered.length) {\n        lastBufferedEnd = buffered.end(buffered.length - 1);\n      }\n\n      var bufferedTime = Math.max(0, lastBufferedEnd - currentTime);\n\n      if (!playlist.segments.length) {\n        return null;\n      }\n\n      // if there is plenty of content buffered, and the video has\n      // been played before relax for awhile\n      if (bufferedTime >= this.goalBufferLength_()) {\n        return null;\n      }\n\n      // if the video has not yet played once, and we already have\n      // one segment downloaded do nothing\n      if (!hasPlayed && bufferedTime >= 1) {\n        return null;\n      }\n\n      this.logger_('checkBuffer_', 'mediaIndex:', mediaIndex, 'hasPlayed:', hasPlayed, 'currentTime:', currentTime, 'syncPoint:', syncPoint, 'fetchAtBuffer:', this.fetchAtBuffer_, 'bufferedTime:', bufferedTime);\n\n      // When the syncPoint is null, there is no way of determining a good\n      // conservative segment index to fetch from\n      // The best thing to do here is to get the kind of sync-point data by\n      // making a request\n      if (syncPoint === null) {\n        mediaIndex = this.getSyncSegmentCandidate_(playlist);\n        this.logger_('getSync', 'mediaIndex:', mediaIndex);\n        return this.generateSegmentInfo_(playlist, mediaIndex, null, true);\n      }\n\n      // Under normal playback conditions fetching is a simple walk forward\n      if (mediaIndex !== null) {\n        this.logger_('walkForward', 'mediaIndex:', mediaIndex + 1);\n        var segment = playlist.segments[mediaIndex];\n\n        if (segment && segment.end) {\n          startOfSegment = segment.end;\n        } else {\n          startOfSegment = lastBufferedEnd;\n        }\n        return this.generateSegmentInfo_(playlist, mediaIndex + 1, startOfSegment, false);\n      }\n\n      // There is a sync-point but the lack of a mediaIndex indicates that\n      // we need to make a good conservative guess about which segment to\n      // fetch\n      if (this.fetchAtBuffer_) {\n        // Find the segment containing the end of the buffer\n        var mediaSourceInfo = _playlist2['default'].getMediaInfoForTime(playlist, lastBufferedEnd, syncPoint.segmentIndex, syncPoint.time);\n\n        mediaIndex = mediaSourceInfo.mediaIndex;\n        startOfSegment = mediaSourceInfo.startTime;\n      } else {\n        // Find the segment containing currentTime\n        var mediaSourceInfo = _playlist2['default'].getMediaInfoForTime(playlist, currentTime, syncPoint.segmentIndex, syncPoint.time);\n\n        mediaIndex = mediaSourceInfo.mediaIndex;\n        startOfSegment = mediaSourceInfo.startTime;\n      }\n      this.logger_('getMediaIndexForTime', 'mediaIndex:', mediaIndex, 'startOfSegment:', startOfSegment);\n\n      return this.generateSegmentInfo_(playlist, mediaIndex, startOfSegment, false);\n    }\n\n    /**\n     * The segment loader has no recourse except to fetch a segment in the\n     * current playlist and use the internal timestamps in that segment to\n     * generate a syncPoint. This function returns a good candidate index\n     * for that process.\n     *\n     * @param {Object} playlist - the playlist object to look for a\n     * @returns {Number} An index of a segment from the playlist to load\n     */\n  }, {\n    key: 'getSyncSegmentCandidate_',\n    value: function getSyncSegmentCandidate_(playlist) {\n      var _this2 = this;\n\n      if (this.currentTimeline_ === -1) {\n        return 0;\n      }\n\n      var segmentIndexArray = playlist.segments.map(function (s, i) {\n        return {\n          timeline: s.timeline,\n          segmentIndex: i\n        };\n      }).filter(function (s) {\n        return s.timeline === _this2.currentTimeline_;\n      });\n\n      if (segmentIndexArray.length) {\n        return segmentIndexArray[Math.min(segmentIndexArray.length - 1, 1)].segmentIndex;\n      }\n\n      return Math.max(playlist.segments.length - 1, 0);\n    }\n  }, {\n    key: 'generateSegmentInfo_',\n    value: function generateSegmentInfo_(playlist, mediaIndex, startOfSegment, isSyncRequest) {\n      if (mediaIndex < 0 || mediaIndex >= playlist.segments.length) {\n        return null;\n      }\n\n      var segment = playlist.segments[mediaIndex];\n\n      return {\n        requestId: 'segment-loader-' + Math.random(),\n        // resolve the segment URL relative to the playlist\n        uri: segment.resolvedUri,\n        // the segment's mediaIndex at the time it was requested\n        mediaIndex: mediaIndex,\n        // whether or not to update the SegmentLoader's state with this\n        // segment's mediaIndex\n        isSyncRequest: isSyncRequest,\n        startOfSegment: startOfSegment,\n        // the segment's playlist\n        playlist: playlist,\n        // unencrypted bytes of the segment\n        bytes: null,\n        // when a key is defined for this segment, the encrypted bytes\n        encryptedBytes: null,\n        // The target timestampOffset for this segment when we append it\n        // to the source buffer\n        timestampOffset: null,\n        // The timeline that the segment is in\n        timeline: segment.timeline,\n        // The expected duration of the segment in seconds\n        duration: segment.duration,\n        // retain the segment in case the playlist updates while doing an async process\n        segment: segment\n      };\n    }\n\n    /**\n     * Determines if the network has enough bandwidth to complete the current segment\n     * request in a timely manner. If not, the request will be aborted early and bandwidth\n     * updated to trigger a playlist switch.\n     *\n     * @param {Object} stats\n     *        Object containing stats about the request timing and size\n     * @return {Boolean} True if the request was aborted, false otherwise\n     * @private\n     */\n  }, {\n    key: 'abortRequestEarly_',\n    value: function abortRequestEarly_(stats) {\n      if (this.hls_.tech_.paused() ||\n      // Don't abort if the current playlist is on the lowestEnabledRendition\n      // TODO: Replace using timeout with a boolean indicating whether this playlist is\n      //       the lowestEnabledRendition.\n      !this.xhrOptions_.timeout ||\n      // Don't abort if we have no bandwidth information to estimate segment sizes\n      !this.playlist_.attributes.BANDWIDTH) {\n        return false;\n      }\n\n      // Wait at least 1 second since the first byte of data has been received before\n      // using the calculated bandwidth from the progress event to allow the bitrate\n      // to stabilize\n      if (Date.now() - (stats.firstBytesReceivedAt || Date.now()) < 1000) {\n        return false;\n      }\n\n      var currentTime = this.currentTime_();\n      var measuredBandwidth = stats.bandwidth;\n      var segmentDuration = this.pendingSegment_.duration;\n\n      var requestTimeRemaining = _playlist2['default'].estimateSegmentRequestTime(segmentDuration, measuredBandwidth, this.playlist_, stats.bytesReceived);\n\n      // Subtract 1 from the timeUntilRebuffer so we still consider an early abort\n      // if we are only left with less than 1 second when the request completes.\n      // A negative timeUntilRebuffering indicates we are already rebuffering\n      var timeUntilRebuffer = (0, _ranges.timeUntilRebuffer)(this.buffered_(), currentTime, this.hls_.tech_.playbackRate()) - 1;\n\n      // Only consider aborting early if the estimated time to finish the download\n      // is larger than the estimated time until the player runs out of forward buffer\n      if (requestTimeRemaining <= timeUntilRebuffer) {\n        return false;\n      }\n\n      var switchCandidate = (0, _playlistSelectors.minRebufferMaxBandwidthSelector)({\n        master: this.hls_.playlists.master,\n        currentTime: currentTime,\n        bandwidth: measuredBandwidth,\n        duration: this.duration_(),\n        segmentDuration: segmentDuration,\n        timeUntilRebuffer: timeUntilRebuffer,\n        currentTimeline: this.currentTimeline_,\n        syncController: this.syncController_\n      });\n\n      if (!switchCandidate) {\n        return;\n      }\n\n      var rebufferingImpact = requestTimeRemaining - timeUntilRebuffer;\n\n      var timeSavedBySwitching = rebufferingImpact - switchCandidate.rebufferingImpact;\n\n      var minimumTimeSaving = 0.5;\n\n      // If we are already rebuffering, increase the amount of variance we add to the\n      // potential round trip time of the new request so that we are not too aggressive\n      // with switching to a playlist that might save us a fraction of a second.\n      if (timeUntilRebuffer <= _ranges.TIME_FUDGE_FACTOR) {\n        minimumTimeSaving = 1;\n      }\n\n      if (!switchCandidate.playlist || switchCandidate.playlist.uri === this.playlist_.uri || timeSavedBySwitching < minimumTimeSaving) {\n        return false;\n      }\n\n      // set the bandwidth to that of the desired playlist being sure to scale by\n      // BANDWIDTH_VARIANCE and add one so the playlist selector does not exclude it\n      // don't trigger a bandwidthupdate as the bandwidth is artifial\n      this.bandwidth = switchCandidate.playlist.attributes.BANDWIDTH * _config2['default'].BANDWIDTH_VARIANCE + 1;\n      this.abort();\n      this.trigger('earlyabort');\n      return true;\n    }\n\n    /**\n     * XHR `progress` event handler\n     *\n     * @param {Event}\n     *        The XHR `progress` event\n     * @param {Object} simpleSegment\n     *        A simplified segment object copy\n     * @private\n     */\n  }, {\n    key: 'handleProgress_',\n    value: function handleProgress_(event, simpleSegment) {\n      if (!this.pendingSegment_ || simpleSegment.requestId !== this.pendingSegment_.requestId || this.abortRequestEarly_(simpleSegment.stats)) {\n        return;\n      }\n\n      this.trigger('progress');\n    }\n\n    /**\n     * load a specific segment from a request into the buffer\n     *\n     * @private\n     */\n  }, {\n    key: 'loadSegment_',\n    value: function loadSegment_(segmentInfo) {\n      this.state = 'WAITING';\n      this.pendingSegment_ = segmentInfo;\n      this.trimBackBuffer_(segmentInfo);\n\n      segmentInfo.abortRequests = (0, _mediaSegmentRequest.mediaSegmentRequest)(this.hls_.xhr, this.xhrOptions_, this.decrypter_, this.createSimplifiedSegmentObj_(segmentInfo),\n      // progress callback\n      this.handleProgress_.bind(this), this.segmentRequestFinished_.bind(this));\n    }\n\n    /**\n     * trim the back buffer so that we don't have too much data\n     * in the source buffer\n     *\n     * @private\n     *\n     * @param {Object} segmentInfo - the current segment\n     */\n  }, {\n    key: 'trimBackBuffer_',\n    value: function trimBackBuffer_(segmentInfo) {\n      var removeToTime = safeBackBufferTrimTime(this.seekable_(), this.currentTime_(), this.playlist_.targetDuration || 10);\n\n      // Chrome has a hard limit of 150MB of\n      // buffer and a very conservative \"garbage collector\"\n      // We manually clear out the old buffer to ensure\n      // we don't trigger the QuotaExceeded error\n      // on the source buffer during subsequent appends\n\n      if (removeToTime > 0) {\n        this.remove(0, removeToTime);\n      }\n    }\n\n    /**\n     * created a simplified copy of the segment object with just the\n     * information necessary to perform the XHR and decryption\n     *\n     * @private\n     *\n     * @param {Object} segmentInfo - the current segment\n     * @returns {Object} a simplified segment object copy\n     */\n  }, {\n    key: 'createSimplifiedSegmentObj_',\n    value: function createSimplifiedSegmentObj_(segmentInfo) {\n      var segment = segmentInfo.segment;\n      var simpleSegment = {\n        resolvedUri: segment.resolvedUri,\n        byterange: segment.byterange,\n        requestId: segmentInfo.requestId\n      };\n\n      if (segment.key) {\n        // if the media sequence is greater than 2^32, the IV will be incorrect\n        // assuming 10s segments, that would be about 1300 years\n        var iv = segment.key.iv || new Uint32Array([0, 0, 0, segmentInfo.mediaIndex + segmentInfo.playlist.mediaSequence]);\n\n        simpleSegment.key = {\n          resolvedUri: segment.key.resolvedUri,\n          iv: iv\n        };\n      }\n\n      if (segment.map) {\n        simpleSegment.map = this.initSegment(segment.map);\n      }\n\n      return simpleSegment;\n    }\n\n    /**\n     * Handle the callback from the segmentRequest function and set the\n     * associated SegmentLoader state and errors if necessary\n     *\n     * @private\n     */\n  }, {\n    key: 'segmentRequestFinished_',\n    value: function segmentRequestFinished_(error, simpleSegment) {\n      // every request counts as a media request even if it has been aborted\n      // or canceled due to a timeout\n      this.mediaRequests += 1;\n\n      if (simpleSegment.stats) {\n        this.mediaBytesTransferred += simpleSegment.stats.bytesReceived;\n        this.mediaTransferDuration += simpleSegment.stats.roundTripTime;\n      }\n\n      // The request was aborted and the SegmentLoader has already been reset\n      if (!this.pendingSegment_) {\n        this.mediaRequestsAborted += 1;\n        return;\n      }\n\n      // the request was aborted and the SegmentLoader has already started\n      // another request. this can happen when the timeout for an aborted\n      // request triggers due to a limitation in the XHR library\n      // do not count this as any sort of request or we risk double-counting\n      if (simpleSegment.requestId !== this.pendingSegment_.requestId) {\n        return;\n      }\n\n      // an error occurred from the active pendingSegment_ so reset everything\n      if (error) {\n        this.pendingSegment_ = null;\n        this.state = 'READY';\n\n        // the requests were aborted just record the aborted stat and exit\n        // this is not a true error condition and nothing corrective needs\n        // to be done\n        if (error.code === _mediaSegmentRequest.REQUEST_ERRORS.ABORTED) {\n          this.mediaRequestsAborted += 1;\n          return;\n        }\n\n        this.pause();\n\n        // the error is really just that at least one of the requests timed-out\n        // set the bandwidth to a very low value and trigger an ABR switch to\n        // take emergency action\n        if (error.code === _mediaSegmentRequest.REQUEST_ERRORS.TIMEOUT) {\n          this.mediaRequestsTimedout += 1;\n          this.bandwidth = 1;\n          this.roundTrip = NaN;\n          this.trigger('bandwidthupdate');\n          return;\n        }\n\n        // if control-flow has arrived here, then the error is real\n        // emit an error event to blacklist the current playlist\n        this.mediaRequestsErrored += 1;\n        this.error(error);\n        this.trigger('error');\n        return;\n      }\n\n      // the response was a success so set any bandwidth stats the request\n      // generated for ABR purposes\n      this.bandwidth = simpleSegment.stats.bandwidth;\n      this.roundTrip = simpleSegment.stats.roundTripTime;\n\n      // if this request included an initialization segment, save that data\n      // to the initSegment cache\n      if (simpleSegment.map) {\n        simpleSegment.map = this.initSegment(simpleSegment.map, true);\n      }\n\n      this.processSegmentResponse_(simpleSegment);\n    }\n\n    /**\n     * Move any important data from the simplified segment object\n     * back to the real segment object for future phases\n     *\n     * @private\n     */\n  }, {\n    key: 'processSegmentResponse_',\n    value: function processSegmentResponse_(simpleSegment) {\n      var segmentInfo = this.pendingSegment_;\n\n      segmentInfo.bytes = simpleSegment.bytes;\n      if (simpleSegment.map) {\n        segmentInfo.segment.map.bytes = simpleSegment.map.bytes;\n      }\n\n      segmentInfo.endOfAllRequests = simpleSegment.endOfAllRequests;\n      this.handleSegment_();\n    }\n\n    /**\n     * append a decrypted segement to the SourceBuffer through a SourceUpdater\n     *\n     * @private\n     */\n  }, {\n    key: 'handleSegment_',\n    value: function handleSegment_() {\n      var _this3 = this;\n\n      if (!this.pendingSegment_) {\n        this.state = 'READY';\n        return;\n      }\n\n      var segmentInfo = this.pendingSegment_;\n      var segment = segmentInfo.segment;\n      var timingInfo = this.syncController_.probeSegmentInfo(segmentInfo);\n\n      // When we have our first timing info, determine what media types this loader is\n      // dealing with. Although we're maintaining extra state, it helps to preserve the\n      // separation of segment loader from the actual source buffers.\n      if (typeof this.startingMedia_ === 'undefined' && timingInfo && (\n      // Guard against cases where we're not getting timing info at all until we are\n      // certain that all streams will provide it.\n      timingInfo.containsAudio || timingInfo.containsVideo)) {\n        this.startingMedia_ = {\n          containsAudio: timingInfo.containsAudio,\n          containsVideo: timingInfo.containsVideo\n        };\n      }\n\n      var illegalMediaSwitchError = illegalMediaSwitch(this.loaderType_, this.startingMedia_, timingInfo);\n\n      if (illegalMediaSwitchError) {\n        this.error({\n          message: illegalMediaSwitchError,\n          blacklistDuration: Infinity\n        });\n        this.trigger('error');\n        return;\n      }\n\n      if (segmentInfo.isSyncRequest) {\n        this.trigger('syncinfoupdate');\n        this.pendingSegment_ = null;\n        this.state = 'READY';\n        return;\n      }\n\n      if (segmentInfo.timestampOffset !== null && segmentInfo.timestampOffset !== this.sourceUpdater_.timestampOffset()) {\n        this.sourceUpdater_.timestampOffset(segmentInfo.timestampOffset);\n        // fired when a timestamp offset is set in HLS (can also identify discontinuities)\n        this.trigger('timestampoffset');\n      }\n\n      var timelineMapping = this.syncController_.mappingForTimeline(segmentInfo.timeline);\n\n      if (timelineMapping !== null) {\n        this.trigger({\n          type: 'segmenttimemapping',\n          mapping: timelineMapping\n        });\n      }\n\n      this.state = 'APPENDING';\n\n      // if the media initialization segment is changing, append it\n      // before the content segment\n      if (segment.map) {\n        (function () {\n          var initId = (0, _binUtils.initSegmentId)(segment.map);\n\n          if (!_this3.activeInitSegmentId_ || _this3.activeInitSegmentId_ !== initId) {\n            var initSegment = _this3.initSegment(segment.map);\n\n            _this3.sourceUpdater_.appendBuffer(initSegment.bytes, function () {\n              _this3.activeInitSegmentId_ = initId;\n            });\n          }\n        })();\n      }\n\n      segmentInfo.byteLength = segmentInfo.bytes.byteLength;\n      if (typeof segment.start === 'number' && typeof segment.end === 'number') {\n        this.mediaSecondsLoaded += segment.end - segment.start;\n      } else {\n        this.mediaSecondsLoaded += segment.duration;\n      }\n\n      this.sourceUpdater_.appendBuffer(segmentInfo.bytes, this.handleUpdateEnd_.bind(this));\n    }\n\n    /**\n     * callback to run when appendBuffer is finished. detects if we are\n     * in a good state to do things with the data we got, or if we need\n     * to wait for more\n     *\n     * @private\n     */\n  }, {\n    key: 'handleUpdateEnd_',\n    value: function handleUpdateEnd_() {\n      this.logger_('handleUpdateEnd_', 'segmentInfo:', this.pendingSegment_);\n\n      if (!this.pendingSegment_) {\n        this.state = 'READY';\n        if (!this.paused()) {\n          this.monitorBuffer_();\n        }\n        return;\n      }\n\n      var segmentInfo = this.pendingSegment_;\n      var segment = segmentInfo.segment;\n      var isWalkingForward = this.mediaIndex !== null;\n\n      this.pendingSegment_ = null;\n      this.recordThroughput_(segmentInfo);\n      this.addSegmentMetadataCue_(segmentInfo);\n\n      this.state = 'READY';\n\n      this.mediaIndex = segmentInfo.mediaIndex;\n      this.fetchAtBuffer_ = true;\n      this.currentTimeline_ = segmentInfo.timeline;\n\n      // We must update the syncinfo to recalculate the seekable range before\n      // the following conditional otherwise it may consider this a bad \"guess\"\n      // and attempt to resync when the post-update seekable window and live\n      // point would mean that this was the perfect segment to fetch\n      this.trigger('syncinfoupdate');\n\n      // If we previously appended a segment that ends more than 3 targetDurations before\n      // the currentTime_ that means that our conservative guess was too conservative.\n      // In that case, reset the loader state so that we try to use any information gained\n      // from the previous request to create a new, more accurate, sync-point.\n      if (segment.end && this.currentTime_() - segment.end > segmentInfo.playlist.targetDuration * 3) {\n        this.resetEverything();\n        return;\n      }\n\n      // Don't do a rendition switch unless we have enough time to get a sync segment\n      // and conservatively guess\n      if (isWalkingForward) {\n        this.trigger('bandwidthupdate');\n      }\n      this.trigger('progress');\n\n      // any time an update finishes and the last segment is in the\n      // buffer, end the stream. this ensures the \"ended\" event will\n      // fire if playback reaches that point.\n      var isEndOfStream = detectEndOfStream(segmentInfo.playlist, this.mediaSource_, segmentInfo.mediaIndex + 1);\n\n      if (isEndOfStream) {\n        this.endOfStream();\n      }\n\n      if (!this.paused()) {\n        this.monitorBuffer_();\n      }\n    }\n\n    /**\n     * Records the current throughput of the decrypt, transmux, and append\n     * portion of the semgment pipeline. `throughput.rate` is a the cumulative\n     * moving average of the throughput. `throughput.count` is the number of\n     * data points in the average.\n     *\n     * @private\n     * @param {Object} segmentInfo the object returned by loadSegment\n     */\n  }, {\n    key: 'recordThroughput_',\n    value: function recordThroughput_(segmentInfo) {\n      var rate = this.throughput.rate;\n      // Add one to the time to ensure that we don't accidentally attempt to divide\n      // by zero in the case where the throughput is ridiculously high\n      var segmentProcessingTime = Date.now() - segmentInfo.endOfAllRequests + 1;\n      // Multiply by 8000 to convert from bytes/millisecond to bits/second\n      var segmentProcessingThroughput = Math.floor(segmentInfo.byteLength / segmentProcessingTime * 8 * 1000);\n\n      // This is just a cumulative moving average calculation:\n      //   newAvg = oldAvg + (sample - oldAvg) / (sampleCount + 1)\n      this.throughput.rate += (segmentProcessingThroughput - rate) / ++this.throughput.count;\n    }\n\n    /**\n     * A debugging logger noop that is set to console.log only if debugging\n     * is enabled globally\n     *\n     * @private\n     */\n  }, {\n    key: 'logger_',\n    value: function logger_() {}\n\n    /**\n     * Adds a cue to the segment-metadata track with some metadata information about the\n     * segment\n     *\n     * @private\n     * @param {Object} segmentInfo\n     *        the object returned by loadSegment\n     * @method addSegmentMetadataCue_\n     */\n  }, {\n    key: 'addSegmentMetadataCue_',\n    value: function addSegmentMetadataCue_(segmentInfo) {\n      if (!this.segmentMetadataTrack_) {\n        return;\n      }\n\n      var segment = segmentInfo.segment;\n      var start = segment.start;\n      var end = segment.end;\n\n      // Do not try adding the cue if the start and end times are invalid.\n      if (!finite(start) || !finite(end)) {\n        return;\n      }\n\n      (0, _videojsContribMediaSourcesEs5RemoveCuesFromTrackJs2['default'])(start, end, this.segmentMetadataTrack_);\n\n      var Cue = _globalWindow2['default'].WebKitDataCue || _globalWindow2['default'].VTTCue;\n      var value = {\n        bandwidth: segmentInfo.playlist.attributes.BANDWIDTH,\n        resolution: segmentInfo.playlist.attributes.RESOLUTION,\n        codecs: segmentInfo.playlist.attributes.CODECS,\n        byteLength: segmentInfo.byteLength,\n        uri: segmentInfo.uri,\n        timeline: segmentInfo.timeline,\n        playlist: segmentInfo.playlist.uri,\n        start: start,\n        end: end\n      };\n      var data = JSON.stringify(value);\n      var cue = new Cue(start, end, data);\n\n      // Attach the metadata to the value property of the cue to keep consistency between\n      // the differences of WebKitDataCue in safari and VTTCue in other browsers\n      cue.value = value;\n\n      this.segmentMetadataTrack_.addCue(cue);\n    }\n  }]);\n\n  return SegmentLoader;\n})(_videoJs2['default'].EventTarget);\n\nexports['default'] = SegmentLoader;","module.exports = function () {\n  throw new Error('Readable.from is not available in the browser')\n};\n","/*!\n  * @intlify/shared v9.1.6\n  * (c) 2021 kazuya kawaguchi\n  * Released under the MIT License.\n  */\n/**\r\n * Original Utilities\r\n * written by kazuya kawaguchi\r\n */\r\nconst inBrowser = typeof window !== 'undefined';\r\nlet mark;\r\nlet measure;\r\nif ((process.env.NODE_ENV !== 'production')) {\r\n    const perf = inBrowser && window.performance;\r\n    if (perf &&\r\n        perf.mark &&\r\n        perf.measure &&\r\n        perf.clearMarks &&\r\n        perf.clearMeasures) {\r\n        mark = (tag) => perf.mark(tag);\r\n        measure = (name, startTag, endTag) => {\r\n            perf.measure(name, startTag, endTag);\r\n            perf.clearMarks(startTag);\r\n            perf.clearMarks(endTag);\r\n        };\r\n    }\r\n}\r\nconst RE_ARGS = /\\{([0-9a-zA-Z]+)\\}/g;\r\n/* eslint-disable */\r\nfunction format(message, ...args) {\r\n    if (args.length === 1 && isObject(args[0])) {\r\n        args = args[0];\r\n    }\r\n    if (!args || !args.hasOwnProperty) {\r\n        args = {};\r\n    }\r\n    return message.replace(RE_ARGS, (match, identifier) => {\r\n        return args.hasOwnProperty(identifier) ? args[identifier] : '';\r\n    });\r\n}\r\nconst hasSymbol = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';\r\nconst makeSymbol = (name) => hasSymbol ? Symbol(name) : name;\r\nconst generateFormatCacheKey = (locale, key, source) => friendlyJSONstringify({ l: locale, k: key, s: source });\r\nconst friendlyJSONstringify = (json) => JSON.stringify(json)\r\n    .replace(/\\u2028/g, '\\\\u2028')\r\n    .replace(/\\u2029/g, '\\\\u2029')\r\n    .replace(/\\u0027/g, '\\\\u0027');\r\nconst isNumber = (val) => typeof val === 'number' && isFinite(val);\r\nconst isDate = (val) => toTypeString(val) === '[object Date]';\r\nconst isRegExp = (val) => toTypeString(val) === '[object RegExp]';\r\nconst isEmptyObject = (val) => isPlainObject(val) && Object.keys(val).length === 0;\r\nfunction warn(msg, err) {\r\n    if (typeof console !== 'undefined') {\r\n        console.warn(`[intlify] ` + msg);\r\n        /* istanbul ignore if */\r\n        if (err) {\r\n            console.warn(err.stack);\r\n        }\r\n    }\r\n}\r\nconst assign = Object.assign;\r\nlet _globalThis;\r\nconst getGlobalThis = () => {\r\n    // prettier-ignore\r\n    return (_globalThis ||\r\n        (_globalThis =\r\n            typeof globalThis !== 'undefined'\r\n                ? globalThis\r\n                : typeof self !== 'undefined'\r\n                    ? self\r\n                    : typeof window !== 'undefined'\r\n                        ? window\r\n                        : typeof global !== 'undefined'\r\n                            ? global\r\n                            : {}));\r\n};\r\nfunction escapeHtml(rawText) {\r\n    return rawText\r\n        .replace(/</g, '&lt;')\r\n        .replace(/>/g, '&gt;')\r\n        .replace(/\"/g, '&quot;')\r\n        .replace(/'/g, '&apos;');\r\n}\r\nconst hasOwnProperty = Object.prototype.hasOwnProperty;\r\nfunction hasOwn(obj, key) {\r\n    return hasOwnProperty.call(obj, key);\r\n}\r\n/* eslint-enable */\r\n/**\r\n * Useful Utilities By Evan you\r\n * Modified by kazuya kawaguchi\r\n * MIT License\r\n * https://github.com/vuejs/vue-next/blob/master/packages/shared/src/index.ts\r\n * https://github.com/vuejs/vue-next/blob/master/packages/shared/src/codeframe.ts\r\n */\r\nconst isArray = Array.isArray;\r\nconst isFunction = (val) => typeof val === 'function';\r\nconst isString = (val) => typeof val === 'string';\r\nconst isBoolean = (val) => typeof val === 'boolean';\r\nconst isSymbol = (val) => typeof val === 'symbol';\r\nconst isObject = (val) => // eslint-disable-line\r\n val !== null && typeof val === 'object';\r\nconst isPromise = (val) => {\r\n    return isObject(val) && isFunction(val.then) && isFunction(val.catch);\r\n};\r\nconst objectToString = Object.prototype.toString;\r\nconst toTypeString = (value) => objectToString.call(value);\r\nconst isPlainObject = (val) => toTypeString(val) === '[object Object]';\r\n// for converting list and named values to displayed strings.\r\nconst toDisplayString = (val) => {\r\n    return val == null\r\n        ? ''\r\n        : isArray(val) || (isPlainObject(val) && val.toString === objectToString)\r\n            ? JSON.stringify(val, null, 2)\r\n            : String(val);\r\n};\r\nconst RANGE = 2;\r\nfunction generateCodeFrame(source, start = 0, end = source.length) {\r\n    const lines = source.split(/\\r?\\n/);\r\n    let count = 0;\r\n    const res = [];\r\n    for (let i = 0; i < lines.length; i++) {\r\n        count += lines[i].length + 1;\r\n        if (count >= start) {\r\n            for (let j = i - RANGE; j <= i + RANGE || end > count; j++) {\r\n                if (j < 0 || j >= lines.length)\r\n                    continue;\r\n                const line = j + 1;\r\n                res.push(`${line}${' '.repeat(3 - String(line).length)}|  ${lines[j]}`);\r\n                const lineLength = lines[j].length;\r\n                if (j === i) {\r\n                    // push underline\r\n                    const pad = start - (count - lineLength) + 1;\r\n                    const length = Math.max(1, end > count ? lineLength - pad : end - start);\r\n                    res.push(`   |  ` + ' '.repeat(pad) + '^'.repeat(length));\r\n                }\r\n                else if (j > i) {\r\n                    if (end > count) {\r\n                        const length = Math.max(Math.min(end - count, lineLength), 1);\r\n                        res.push(`   |  ` + '^'.repeat(length));\r\n                    }\r\n                    count += lineLength + 1;\r\n                }\r\n            }\r\n            break;\r\n        }\r\n    }\r\n    return res.join('\\n');\r\n}\n\n/**\r\n * Event emitter, forked from the below:\r\n * - original repository url: https://github.com/developit/mitt\r\n * - code url: https://github.com/developit/mitt/blob/master/src/index.ts\r\n * - author: Jason Miller (https://github.com/developit)\r\n * - license: MIT\r\n */\r\n/**\r\n * Create a event emitter\r\n *\r\n * @returns An event emitter\r\n */\r\nfunction createEmitter() {\r\n    const events = new Map();\r\n    const emitter = {\r\n        events,\r\n        on(event, handler) {\r\n            const handlers = events.get(event);\r\n            const added = handlers && handlers.push(handler);\r\n            if (!added) {\r\n                events.set(event, [handler]);\r\n            }\r\n        },\r\n        off(event, handler) {\r\n            const handlers = events.get(event);\r\n            if (handlers) {\r\n                handlers.splice(handlers.indexOf(handler) >>> 0, 1);\r\n            }\r\n        },\r\n        emit(event, payload) {\r\n            (events.get(event) || [])\r\n                .slice()\r\n                .map(handler => handler(payload));\r\n            (events.get('*') || [])\r\n                .slice()\r\n                .map(handler => handler(event, payload));\r\n        }\r\n    };\r\n    return emitter;\r\n}\n\nexport { assign, createEmitter, escapeHtml, format, friendlyJSONstringify, generateCodeFrame, generateFormatCacheKey, getGlobalThis, hasOwn, inBrowser, isArray, isBoolean, isDate, isEmptyObject, isFunction, isNumber, isObject, isPlainObject, isPromise, isRegExp, isString, isSymbol, makeSymbol, mark, measure, objectToString, toDisplayString, toTypeString, warn };\n","import { stringToBytes, toUint8, bytesMatch, bytesToString, toHexString, padStart, bytesToNumber } from './byte-helpers.js';\nimport { getAvcCodec, getHvcCodec, getAv1Codec } from './codec-helpers.js';\nimport { parseOpusHead } from './opus-helpers.js';\n\nvar normalizePath = function normalizePath(path) {\n  if (typeof path === 'string') {\n    return stringToBytes(path);\n  }\n\n  if (typeof path === 'number') {\n    return path;\n  }\n\n  return path;\n};\n\nvar normalizePaths = function normalizePaths(paths) {\n  if (!Array.isArray(paths)) {\n    return [normalizePath(paths)];\n  }\n\n  return paths.map(function (p) {\n    return normalizePath(p);\n  });\n};\n\nvar DESCRIPTORS;\nexport var parseDescriptors = function parseDescriptors(bytes) {\n  bytes = toUint8(bytes);\n  var results = [];\n  var i = 0;\n\n  while (bytes.length > i) {\n    var tag = bytes[i];\n    var size = 0;\n    var headerSize = 0; // tag\n\n    headerSize++;\n    var byte = bytes[headerSize]; // first byte\n\n    headerSize++;\n\n    while (byte & 0x80) {\n      size = (byte & 0x7F) << 7;\n      byte = bytes[headerSize];\n      headerSize++;\n    }\n\n    size += byte & 0x7F;\n\n    for (var z = 0; z < DESCRIPTORS.length; z++) {\n      var _DESCRIPTORS$z = DESCRIPTORS[z],\n          id = _DESCRIPTORS$z.id,\n          parser = _DESCRIPTORS$z.parser;\n\n      if (tag === id) {\n        results.push(parser(bytes.subarray(headerSize, headerSize + size)));\n        break;\n      }\n    }\n\n    i += size + headerSize;\n  }\n\n  return results;\n};\nDESCRIPTORS = [{\n  id: 0x03,\n  parser: function parser(bytes) {\n    var desc = {\n      tag: 0x03,\n      id: bytes[0] << 8 | bytes[1],\n      flags: bytes[2],\n      size: 3,\n      dependsOnEsId: 0,\n      ocrEsId: 0,\n      descriptors: [],\n      url: ''\n    }; // depends on es id\n\n    if (desc.flags & 0x80) {\n      desc.dependsOnEsId = bytes[desc.size] << 8 | bytes[desc.size + 1];\n      desc.size += 2;\n    } // url\n\n\n    if (desc.flags & 0x40) {\n      var len = bytes[desc.size];\n      desc.url = bytesToString(bytes.subarray(desc.size + 1, desc.size + 1 + len));\n      desc.size += len;\n    } // ocr es id\n\n\n    if (desc.flags & 0x20) {\n      desc.ocrEsId = bytes[desc.size] << 8 | bytes[desc.size + 1];\n      desc.size += 2;\n    }\n\n    desc.descriptors = parseDescriptors(bytes.subarray(desc.size)) || [];\n    return desc;\n  }\n}, {\n  id: 0x04,\n  parser: function parser(bytes) {\n    // DecoderConfigDescriptor\n    var desc = {\n      tag: 0x04,\n      oti: bytes[0],\n      streamType: bytes[1],\n      bufferSize: bytes[2] << 16 | bytes[3] << 8 | bytes[4],\n      maxBitrate: bytes[5] << 24 | bytes[6] << 16 | bytes[7] << 8 | bytes[8],\n      avgBitrate: bytes[9] << 24 | bytes[10] << 16 | bytes[11] << 8 | bytes[12],\n      descriptors: parseDescriptors(bytes.subarray(13))\n    };\n    return desc;\n  }\n}, {\n  id: 0x05,\n  parser: function parser(bytes) {\n    // DecoderSpecificInfo\n    return {\n      tag: 0x05,\n      bytes: bytes\n    };\n  }\n}, {\n  id: 0x06,\n  parser: function parser(bytes) {\n    // SLConfigDescriptor\n    return {\n      tag: 0x06,\n      bytes: bytes\n    };\n  }\n}];\n/**\n * find any number of boxes by name given a path to it in an iso bmff\n * such as mp4.\n *\n * @param {TypedArray} bytes\n *        bytes for the iso bmff to search for boxes in\n *\n * @param {Uint8Array[]|string[]|string|Uint8Array} name\n *        An array of paths or a single path representing the name\n *        of boxes to search through in bytes. Paths may be\n *        uint8 (character codes) or strings.\n *\n * @param {boolean} [complete=false]\n *        Should we search only for complete boxes on the final path.\n *        This is very useful when you do not want to get back partial boxes\n *        in the case of streaming files.\n *\n * @return {Uint8Array[]}\n *         An array of the end paths that we found.\n */\n\nexport var findBox = function findBox(bytes, paths, complete) {\n  if (complete === void 0) {\n    complete = false;\n  }\n\n  paths = normalizePaths(paths);\n  bytes = toUint8(bytes);\n  var results = [];\n\n  if (!paths.length) {\n    // short-circuit the search for empty paths\n    return results;\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    var size = (bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]) >>> 0;\n    var type = bytes.subarray(i + 4, i + 8); // invalid box format.\n\n    if (size === 0) {\n      break;\n    }\n\n    var end = i + size;\n\n    if (end > bytes.length) {\n      // this box is bigger than the number of bytes we have\n      // and complete is set, we cannot find any more boxes.\n      if (complete) {\n        break;\n      }\n\n      end = bytes.length;\n    }\n\n    var data = bytes.subarray(i + 8, end);\n\n    if (bytesMatch(type, paths[0])) {\n      if (paths.length === 1) {\n        // this is the end of the path and we've found the box we were\n        // looking for\n        results.push(data);\n      } else {\n        // recursively search for the next box along the path\n        results.push.apply(results, findBox(data, paths.slice(1), complete));\n      }\n    }\n\n    i = end;\n  } // we've finished searching all of bytes\n\n\n  return results;\n};\n/**\n * Search for a single matching box by name in an iso bmff format like\n * mp4. This function is useful for finding codec boxes which\n * can be placed arbitrarily in sample descriptions depending\n * on the version of the file or file type.\n *\n * @param {TypedArray} bytes\n *        bytes for the iso bmff to search for boxes in\n *\n * @param {string|Uint8Array} name\n *        The name of the box to find.\n *\n * @return {Uint8Array[]}\n *         a subarray of bytes representing the name boxed we found.\n */\n\nexport var findNamedBox = function findNamedBox(bytes, name) {\n  name = normalizePath(name);\n\n  if (!name.length) {\n    // short-circuit the search for empty paths\n    return bytes.subarray(bytes.length);\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    if (bytesMatch(bytes.subarray(i, i + name.length), name)) {\n      var size = (bytes[i - 4] << 24 | bytes[i - 3] << 16 | bytes[i - 2] << 8 | bytes[i - 1]) >>> 0;\n      var end = size > 1 ? i + size : bytes.byteLength;\n      return bytes.subarray(i + 4, end);\n    }\n\n    i++;\n  } // we've finished searching all of bytes\n\n\n  return bytes.subarray(bytes.length);\n};\n\nvar parseSamples = function parseSamples(data, entrySize, parseEntry) {\n  if (entrySize === void 0) {\n    entrySize = 4;\n  }\n\n  if (parseEntry === void 0) {\n    parseEntry = function parseEntry(d) {\n      return bytesToNumber(d);\n    };\n  }\n\n  var entries = [];\n\n  if (!data || !data.length) {\n    return entries;\n  }\n\n  var entryCount = bytesToNumber(data.subarray(4, 8));\n\n  for (var i = 8; entryCount; i += entrySize, entryCount--) {\n    entries.push(parseEntry(data.subarray(i, i + entrySize)));\n  }\n\n  return entries;\n};\n\nexport var buildFrameTable = function buildFrameTable(stbl, timescale) {\n  var keySamples = parseSamples(findBox(stbl, ['stss'])[0]);\n  var chunkOffsets = parseSamples(findBox(stbl, ['stco'])[0]);\n  var timeToSamples = parseSamples(findBox(stbl, ['stts'])[0], 8, function (entry) {\n    return {\n      sampleCount: bytesToNumber(entry.subarray(0, 4)),\n      sampleDelta: bytesToNumber(entry.subarray(4, 8))\n    };\n  });\n  var samplesToChunks = parseSamples(findBox(stbl, ['stsc'])[0], 12, function (entry) {\n    return {\n      firstChunk: bytesToNumber(entry.subarray(0, 4)),\n      samplesPerChunk: bytesToNumber(entry.subarray(4, 8)),\n      sampleDescriptionIndex: bytesToNumber(entry.subarray(8, 12))\n    };\n  });\n  var stsz = findBox(stbl, ['stsz'])[0]; // stsz starts with a 4 byte sampleSize which we don't need\n\n  var sampleSizes = parseSamples(stsz && stsz.length && stsz.subarray(4) || null);\n  var frames = [];\n\n  for (var chunkIndex = 0; chunkIndex < chunkOffsets.length; chunkIndex++) {\n    var samplesInChunk = void 0;\n\n    for (var i = 0; i < samplesToChunks.length; i++) {\n      var sampleToChunk = samplesToChunks[i];\n      var isThisOne = chunkIndex + 1 >= sampleToChunk.firstChunk && (i + 1 >= samplesToChunks.length || chunkIndex + 1 < samplesToChunks[i + 1].firstChunk);\n\n      if (isThisOne) {\n        samplesInChunk = sampleToChunk.samplesPerChunk;\n        break;\n      }\n    }\n\n    var chunkOffset = chunkOffsets[chunkIndex];\n\n    for (var _i = 0; _i < samplesInChunk; _i++) {\n      var frameEnd = sampleSizes[frames.length]; // if we don't have key samples every frame is a keyframe\n\n      var keyframe = !keySamples.length;\n\n      if (keySamples.length && keySamples.indexOf(frames.length + 1) !== -1) {\n        keyframe = true;\n      }\n\n      var frame = {\n        keyframe: keyframe,\n        start: chunkOffset,\n        end: chunkOffset + frameEnd\n      };\n\n      for (var k = 0; k < timeToSamples.length; k++) {\n        var _timeToSamples$k = timeToSamples[k],\n            sampleCount = _timeToSamples$k.sampleCount,\n            sampleDelta = _timeToSamples$k.sampleDelta;\n\n        if (frames.length <= sampleCount) {\n          // ms to ns\n          var lastTimestamp = frames.length ? frames[frames.length - 1].timestamp : 0;\n          frame.timestamp = lastTimestamp + sampleDelta / timescale * 1000;\n          frame.duration = sampleDelta;\n          break;\n        }\n      }\n\n      frames.push(frame);\n      chunkOffset += frameEnd;\n    }\n  }\n\n  return frames;\n};\nexport var addSampleDescription = function addSampleDescription(track, bytes) {\n  var codec = bytesToString(bytes.subarray(0, 4));\n\n  if (track.type === 'video') {\n    track.info = track.info || {};\n    track.info.width = bytes[28] << 8 | bytes[29];\n    track.info.height = bytes[30] << 8 | bytes[31];\n  } else if (track.type === 'audio') {\n    track.info = track.info || {};\n    track.info.channels = bytes[20] << 8 | bytes[21];\n    track.info.bitDepth = bytes[22] << 8 | bytes[23];\n    track.info.sampleRate = bytes[28] << 8 | bytes[29];\n  }\n\n  if (codec === 'avc1') {\n    var avcC = findNamedBox(bytes, 'avcC'); // AVCDecoderConfigurationRecord\n\n    codec += \".\" + getAvcCodec(avcC);\n    track.info.avcC = avcC; // TODO: do we need to parse all this?\n\n    /* {\n      configurationVersion: avcC[0],\n      profile: avcC[1],\n      profileCompatibility: avcC[2],\n      level: avcC[3],\n      lengthSizeMinusOne: avcC[4] & 0x3\n    };\n     let spsNalUnitCount = avcC[5] & 0x1F;\n    const spsNalUnits = track.info.avc.spsNalUnits = [];\n     // past spsNalUnitCount\n    let offset = 6;\n     while (spsNalUnitCount--) {\n      const nalLen = avcC[offset] << 8 | avcC[offset + 1];\n       spsNalUnits.push(avcC.subarray(offset + 2, offset + 2 + nalLen));\n       offset += nalLen + 2;\n    }\n    let ppsNalUnitCount = avcC[offset];\n    const ppsNalUnits = track.info.avc.ppsNalUnits = [];\n     // past ppsNalUnitCount\n    offset += 1;\n     while (ppsNalUnitCount--) {\n      const nalLen = avcC[offset] << 8 | avcC[offset + 1];\n       ppsNalUnits.push(avcC.subarray(offset + 2, offset + 2 + nalLen));\n       offset += nalLen + 2;\n    }*/\n    // HEVCDecoderConfigurationRecord\n  } else if (codec === 'hvc1' || codec === 'hev1') {\n    codec += \".\" + getHvcCodec(findNamedBox(bytes, 'hvcC'));\n  } else if (codec === 'mp4a' || codec === 'mp4v') {\n    var esds = findNamedBox(bytes, 'esds');\n    var esDescriptor = parseDescriptors(esds.subarray(4))[0];\n    var decoderConfig = esDescriptor && esDescriptor.descriptors.filter(function (_ref) {\n      var tag = _ref.tag;\n      return tag === 0x04;\n    })[0];\n\n    if (decoderConfig) {\n      // most codecs do not have a further '.'\n      // such as 0xa5 for ac-3 and 0xa6 for e-ac-3\n      codec += '.' + toHexString(decoderConfig.oti);\n\n      if (decoderConfig.oti === 0x40) {\n        codec += '.' + (decoderConfig.descriptors[0].bytes[0] >> 3).toString();\n      } else if (decoderConfig.oti === 0x20) {\n        codec += '.' + decoderConfig.descriptors[0].bytes[4].toString();\n      } else if (decoderConfig.oti === 0xdd) {\n        codec = 'vorbis';\n      }\n    } else if (track.type === 'audio') {\n      codec += '.40.2';\n    } else {\n      codec += '.20.9';\n    }\n  } else if (codec === 'av01') {\n    // AV1DecoderConfigurationRecord\n    codec += \".\" + getAv1Codec(findNamedBox(bytes, 'av1C'));\n  } else if (codec === 'vp09') {\n    // VPCodecConfigurationRecord\n    var vpcC = findNamedBox(bytes, 'vpcC'); // https://www.webmproject.org/vp9/mp4/\n\n    var profile = vpcC[0];\n    var level = vpcC[1];\n    var bitDepth = vpcC[2] >> 4;\n    var chromaSubsampling = (vpcC[2] & 0x0F) >> 1;\n    var videoFullRangeFlag = (vpcC[2] & 0x0F) >> 3;\n    var colourPrimaries = vpcC[3];\n    var transferCharacteristics = vpcC[4];\n    var matrixCoefficients = vpcC[5];\n    codec += \".\" + padStart(profile, 2, '0');\n    codec += \".\" + padStart(level, 2, '0');\n    codec += \".\" + padStart(bitDepth, 2, '0');\n    codec += \".\" + padStart(chromaSubsampling, 2, '0');\n    codec += \".\" + padStart(colourPrimaries, 2, '0');\n    codec += \".\" + padStart(transferCharacteristics, 2, '0');\n    codec += \".\" + padStart(matrixCoefficients, 2, '0');\n    codec += \".\" + padStart(videoFullRangeFlag, 2, '0');\n  } else if (codec === 'theo') {\n    codec = 'theora';\n  } else if (codec === 'spex') {\n    codec = 'speex';\n  } else if (codec === '.mp3') {\n    codec = 'mp4a.40.34';\n  } else if (codec === 'msVo') {\n    codec = 'vorbis';\n  } else if (codec === 'Opus') {\n    codec = 'opus';\n    var dOps = findNamedBox(bytes, 'dOps');\n    track.info.opus = parseOpusHead(dOps); // TODO: should this go into the webm code??\n    // Firefox requires a codecDelay for opus playback\n    // see https://bugzilla.mozilla.org/show_bug.cgi?id=1276238\n\n    track.info.codecDelay = 6500000;\n  } else {\n    codec = codec.toLowerCase();\n  }\n  /* eslint-enable */\n  // flac, ac-3, ec-3, opus\n\n\n  track.codec = codec;\n};\nexport var parseTracks = function parseTracks(bytes, frameTable) {\n  if (frameTable === void 0) {\n    frameTable = true;\n  }\n\n  bytes = toUint8(bytes);\n  var traks = findBox(bytes, ['moov', 'trak'], true);\n  var tracks = [];\n  traks.forEach(function (trak) {\n    var track = {\n      bytes: trak\n    };\n    var mdia = findBox(trak, ['mdia'])[0];\n    var hdlr = findBox(mdia, ['hdlr'])[0];\n    var trakType = bytesToString(hdlr.subarray(8, 12));\n\n    if (trakType === 'soun') {\n      track.type = 'audio';\n    } else if (trakType === 'vide') {\n      track.type = 'video';\n    } else {\n      track.type = trakType;\n    }\n\n    var tkhd = findBox(trak, ['tkhd'])[0];\n\n    if (tkhd) {\n      var view = new DataView(tkhd.buffer, tkhd.byteOffset, tkhd.byteLength);\n      var tkhdVersion = view.getUint8(0);\n      track.number = tkhdVersion === 0 ? view.getUint32(12) : view.getUint32(20);\n    }\n\n    var mdhd = findBox(mdia, ['mdhd'])[0];\n\n    if (mdhd) {\n      // mdhd is a FullBox, meaning it will have its own version as the first byte\n      var version = mdhd[0];\n      var index = version === 0 ? 12 : 20;\n      track.timescale = (mdhd[index] << 24 | mdhd[index + 1] << 16 | mdhd[index + 2] << 8 | mdhd[index + 3]) >>> 0;\n    }\n\n    var stbl = findBox(mdia, ['minf', 'stbl'])[0];\n    var stsd = findBox(stbl, ['stsd'])[0];\n    var descriptionCount = bytesToNumber(stsd.subarray(4, 8));\n    var offset = 8; // add codec and codec info\n\n    while (descriptionCount--) {\n      var len = bytesToNumber(stsd.subarray(offset, offset + 4));\n      var sampleDescriptor = stsd.subarray(offset + 4, offset + 4 + len);\n      addSampleDescription(track, sampleDescriptor);\n      offset += 4 + len;\n    }\n\n    if (frameTable) {\n      track.frameTable = buildFrameTable(stbl, track.timescale);\n    } // codec has no sub parameters\n\n\n    tracks.push(track);\n  });\n  return tracks;\n};\nexport var parseMediaInfo = function parseMediaInfo(bytes) {\n  var mvhd = findBox(bytes, ['moov', 'mvhd'], true)[0];\n\n  if (!mvhd || !mvhd.length) {\n    return;\n  }\n\n  var info = {}; // ms to ns\n  // mvhd v1 has 8 byte duration and other fields too\n\n  if (mvhd[0] === 1) {\n    info.timestampScale = bytesToNumber(mvhd.subarray(20, 24));\n    info.duration = bytesToNumber(mvhd.subarray(24, 32));\n  } else {\n    info.timestampScale = bytesToNumber(mvhd.subarray(12, 16));\n    info.duration = bytesToNumber(mvhd.subarray(16, 20));\n  }\n\n  info.bytes = mvhd;\n  return info;\n};","export var OPUS_HEAD = new Uint8Array([// O, p, u, s\n0x4f, 0x70, 0x75, 0x73, // H, e, a, d\n0x48, 0x65, 0x61, 0x64]); // https://wiki.xiph.org/OggOpus\n// https://vfrmaniac.fushizen.eu/contents/opus_in_isobmff.html\n// https://opus-codec.org/docs/opusfile_api-0.7/structOpusHead.html\n\nexport var parseOpusHead = function parseOpusHead(bytes) {\n  var view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);\n  var version = view.getUint8(0); // version 0, from mp4, does not use littleEndian.\n\n  var littleEndian = version !== 0;\n  var config = {\n    version: version,\n    channels: view.getUint8(1),\n    preSkip: view.getUint16(2, littleEndian),\n    sampleRate: view.getUint32(4, littleEndian),\n    outputGain: view.getUint16(8, littleEndian),\n    channelMappingFamily: view.getUint8(10)\n  };\n\n  if (config.channelMappingFamily > 0 && bytes.length > 10) {\n    config.streamCount = view.getUint8(11);\n    config.twoChannelStreamCount = view.getUint8(12);\n    config.channelMapping = [];\n\n    for (var c = 0; c < config.channels; c++) {\n      config.channelMapping.push(view.getUint8(13 + c));\n    }\n  }\n\n  return config;\n};\nexport var setOpusHead = function setOpusHead(config) {\n  var size = config.channelMappingFamily <= 0 ? 11 : 12 + config.channels;\n  var view = new DataView(new ArrayBuffer(size));\n  var littleEndian = config.version !== 0;\n  view.setUint8(0, config.version);\n  view.setUint8(1, config.channels);\n  view.setUint16(2, config.preSkip, littleEndian);\n  view.setUint32(4, config.sampleRate, littleEndian);\n  view.setUint16(8, config.outputGain, littleEndian);\n  view.setUint8(10, config.channelMappingFamily);\n\n  if (config.channelMappingFamily > 0) {\n    view.setUint8(11, config.streamCount);\n    config.channelMapping.foreach(function (cm, i) {\n      view.setUint8(12 + i, cm);\n    });\n  }\n\n  return new Uint8Array(view.buffer);\n};","import { toUint8, bytesToNumber, bytesMatch, bytesToString, numberToBytes, padStart } from './byte-helpers';\nimport { getAvcCodec, getHvcCodec, getAv1Codec } from './codec-helpers.js'; // relevant specs for this parser:\n// https://matroska-org.github.io/libebml/specs.html\n// https://www.matroska.org/technical/elements.html\n// https://www.webmproject.org/docs/container/\n\nexport var EBML_TAGS = {\n  EBML: toUint8([0x1A, 0x45, 0xDF, 0xA3]),\n  DocType: toUint8([0x42, 0x82]),\n  Segment: toUint8([0x18, 0x53, 0x80, 0x67]),\n  SegmentInfo: toUint8([0x15, 0x49, 0xA9, 0x66]),\n  Tracks: toUint8([0x16, 0x54, 0xAE, 0x6B]),\n  Track: toUint8([0xAE]),\n  TrackNumber: toUint8([0xd7]),\n  DefaultDuration: toUint8([0x23, 0xe3, 0x83]),\n  TrackEntry: toUint8([0xAE]),\n  TrackType: toUint8([0x83]),\n  FlagDefault: toUint8([0x88]),\n  CodecID: toUint8([0x86]),\n  CodecPrivate: toUint8([0x63, 0xA2]),\n  VideoTrack: toUint8([0xe0]),\n  AudioTrack: toUint8([0xe1]),\n  // Not used yet, but will be used for live webm/mkv\n  // see https://www.matroska.org/technical/basics.html#block-structure\n  // see https://www.matroska.org/technical/basics.html#simpleblock-structure\n  Cluster: toUint8([0x1F, 0x43, 0xB6, 0x75]),\n  Timestamp: toUint8([0xE7]),\n  TimestampScale: toUint8([0x2A, 0xD7, 0xB1]),\n  BlockGroup: toUint8([0xA0]),\n  BlockDuration: toUint8([0x9B]),\n  Block: toUint8([0xA1]),\n  SimpleBlock: toUint8([0xA3])\n};\n/**\n * This is a simple table to determine the length\n * of things in ebml. The length is one based (starts at 1,\n * rather than zero) and for every zero bit before a one bit\n * we add one to length. We also need this table because in some\n * case we have to xor all the length bits from another value.\n */\n\nvar LENGTH_TABLE = [128, 64, 32, 16, 8, 4, 2, 1];\n\nvar getLength = function getLength(byte) {\n  var len = 1;\n\n  for (var i = 0; i < LENGTH_TABLE.length; i++) {\n    if (byte & LENGTH_TABLE[i]) {\n      break;\n    }\n\n    len++;\n  }\n\n  return len;\n}; // length in ebml is stored in the first 4 to 8 bits\n// of the first byte. 4 for the id length and 8 for the\n// data size length. Length is measured by converting the number to binary\n// then 1 + the number of zeros before a 1 is encountered starting\n// from the left.\n\n\nvar getvint = function getvint(bytes, offset, removeLength, signed) {\n  if (removeLength === void 0) {\n    removeLength = true;\n  }\n\n  if (signed === void 0) {\n    signed = false;\n  }\n\n  var length = getLength(bytes[offset]);\n  var valueBytes = bytes.subarray(offset, offset + length); // NOTE that we do **not** subarray here because we need to copy these bytes\n  // as they will be modified below to remove the dataSizeLen bits and we do not\n  // want to modify the original data. normally we could just call slice on\n  // uint8array but ie 11 does not support that...\n\n  if (removeLength) {\n    valueBytes = Array.prototype.slice.call(bytes, offset, offset + length);\n    valueBytes[0] ^= LENGTH_TABLE[length - 1];\n  }\n\n  return {\n    length: length,\n    value: bytesToNumber(valueBytes, {\n      signed: signed\n    }),\n    bytes: valueBytes\n  };\n};\n\nvar normalizePath = function normalizePath(path) {\n  if (typeof path === 'string') {\n    return path.match(/.{1,2}/g).map(function (p) {\n      return normalizePath(p);\n    });\n  }\n\n  if (typeof path === 'number') {\n    return numberToBytes(path);\n  }\n\n  return path;\n};\n\nvar normalizePaths = function normalizePaths(paths) {\n  if (!Array.isArray(paths)) {\n    return [normalizePath(paths)];\n  }\n\n  return paths.map(function (p) {\n    return normalizePath(p);\n  });\n};\n\nvar getInfinityDataSize = function getInfinityDataSize(id, bytes, offset) {\n  if (offset >= bytes.length) {\n    return bytes.length;\n  }\n\n  var innerid = getvint(bytes, offset, false);\n\n  if (bytesMatch(id.bytes, innerid.bytes)) {\n    return offset;\n  }\n\n  var dataHeader = getvint(bytes, offset + innerid.length);\n  return getInfinityDataSize(id, bytes, offset + dataHeader.length + dataHeader.value + innerid.length);\n};\n/**\n * Notes on the EBLM format.\n *\n * EBLM uses \"vints\" tags. Every vint tag contains\n * two parts\n *\n * 1. The length from the first byte. You get this by\n *    converting the byte to binary and counting the zeros\n *    before a 1. Then you add 1 to that. Examples\n *    00011111 = length 4 because there are 3 zeros before a 1.\n *    00100000 = length 3 because there are 2 zeros before a 1.\n *    00000011 = length 7 because there are 6 zeros before a 1.\n *\n * 2. The bits used for length are removed from the first byte\n *    Then all the bytes are merged into a value. NOTE: this\n *    is not the case for id ebml tags as there id includes\n *    length bits.\n *\n */\n\n\nexport var findEbml = function findEbml(bytes, paths) {\n  paths = normalizePaths(paths);\n  bytes = toUint8(bytes);\n  var results = [];\n\n  if (!paths.length) {\n    return results;\n  }\n\n  var i = 0;\n\n  while (i < bytes.length) {\n    var id = getvint(bytes, i, false);\n    var dataHeader = getvint(bytes, i + id.length);\n    var dataStart = i + id.length + dataHeader.length; // dataSize is unknown or this is a live stream\n\n    if (dataHeader.value === 0x7f) {\n      dataHeader.value = getInfinityDataSize(id, bytes, dataStart);\n\n      if (dataHeader.value !== bytes.length) {\n        dataHeader.value -= dataStart;\n      }\n    }\n\n    var dataEnd = dataStart + dataHeader.value > bytes.length ? bytes.length : dataStart + dataHeader.value;\n    var data = bytes.subarray(dataStart, dataEnd);\n\n    if (bytesMatch(paths[0], id.bytes)) {\n      if (paths.length === 1) {\n        // this is the end of the paths and we've found the tag we were\n        // looking for\n        results.push(data);\n      } else {\n        // recursively search for the next tag inside of the data\n        // of this one\n        results = results.concat(findEbml(data, paths.slice(1)));\n      }\n    }\n\n    var totalLength = id.length + dataHeader.length + data.length; // move past this tag entirely, we are not looking for it\n\n    i += totalLength;\n  }\n\n  return results;\n}; // see https://www.matroska.org/technical/basics.html#block-structure\n\nexport var decodeBlock = function decodeBlock(block, type, timestampScale, clusterTimestamp) {\n  var duration;\n\n  if (type === 'group') {\n    duration = findEbml(block, [EBML_TAGS.BlockDuration])[0];\n\n    if (duration) {\n      duration = bytesToNumber(duration);\n      duration = 1 / timestampScale * duration * timestampScale / 1000;\n    }\n\n    block = findEbml(block, [EBML_TAGS.Block])[0];\n    type = 'block'; // treat data as a block after this point\n  }\n\n  var dv = new DataView(block.buffer, block.byteOffset, block.byteLength);\n  var trackNumber = getvint(block, 0);\n  var timestamp = dv.getInt16(trackNumber.length, false);\n  var flags = block[trackNumber.length + 2];\n  var data = block.subarray(trackNumber.length + 3); // pts/dts in seconds\n\n  var ptsdts = 1 / timestampScale * (clusterTimestamp + timestamp) * timestampScale / 1000; // return the frame\n\n  var parsed = {\n    duration: duration,\n    trackNumber: trackNumber.value,\n    keyframe: type === 'simple' && flags >> 7 === 1,\n    invisible: (flags & 0x08) >> 3 === 1,\n    lacing: (flags & 0x06) >> 1,\n    discardable: type === 'simple' && (flags & 0x01) === 1,\n    frames: [],\n    pts: ptsdts,\n    dts: ptsdts,\n    timestamp: timestamp\n  };\n\n  if (!parsed.lacing) {\n    parsed.frames.push(data);\n    return parsed;\n  }\n\n  var numberOfFrames = data[0] + 1;\n  var frameSizes = [];\n  var offset = 1; // Fixed\n\n  if (parsed.lacing === 2) {\n    var sizeOfFrame = (data.length - offset) / numberOfFrames;\n\n    for (var i = 0; i < numberOfFrames; i++) {\n      frameSizes.push(sizeOfFrame);\n    }\n  } // xiph\n\n\n  if (parsed.lacing === 1) {\n    for (var _i = 0; _i < numberOfFrames - 1; _i++) {\n      var size = 0;\n\n      do {\n        size += data[offset];\n        offset++;\n      } while (data[offset - 1] === 0xFF);\n\n      frameSizes.push(size);\n    }\n  } // ebml\n\n\n  if (parsed.lacing === 3) {\n    // first vint is unsinged\n    // after that vints are singed and\n    // based on a compounding size\n    var _size = 0;\n\n    for (var _i2 = 0; _i2 < numberOfFrames - 1; _i2++) {\n      var vint = _i2 === 0 ? getvint(data, offset) : getvint(data, offset, true, true);\n      _size += vint.value;\n      frameSizes.push(_size);\n      offset += vint.length;\n    }\n  }\n\n  frameSizes.forEach(function (size) {\n    parsed.frames.push(data.subarray(offset, offset + size));\n    offset += size;\n  });\n  return parsed;\n}; // VP9 Codec Feature Metadata (CodecPrivate)\n// https://www.webmproject.org/docs/container/\n\nvar parseVp9Private = function parseVp9Private(bytes) {\n  var i = 0;\n  var params = {};\n\n  while (i < bytes.length) {\n    var id = bytes[i] & 0x7f;\n    var len = bytes[i + 1];\n    var val = void 0;\n\n    if (len === 1) {\n      val = bytes[i + 2];\n    } else {\n      val = bytes.subarray(i + 2, i + 2 + len);\n    }\n\n    if (id === 1) {\n      params.profile = val;\n    } else if (id === 2) {\n      params.level = val;\n    } else if (id === 3) {\n      params.bitDepth = val;\n    } else if (id === 4) {\n      params.chromaSubsampling = val;\n    } else {\n      params[id] = val;\n    }\n\n    i += 2 + len;\n  }\n\n  return params;\n};\n\nexport var parseTracks = function parseTracks(bytes) {\n  bytes = toUint8(bytes);\n  var decodedTracks = [];\n  var tracks = findEbml(bytes, [EBML_TAGS.Segment, EBML_TAGS.Tracks, EBML_TAGS.Track]);\n\n  if (!tracks.length) {\n    tracks = findEbml(bytes, [EBML_TAGS.Tracks, EBML_TAGS.Track]);\n  }\n\n  if (!tracks.length) {\n    tracks = findEbml(bytes, [EBML_TAGS.Track]);\n  }\n\n  if (!tracks.length) {\n    return decodedTracks;\n  }\n\n  tracks.forEach(function (track) {\n    var trackType = findEbml(track, EBML_TAGS.TrackType)[0];\n\n    if (!trackType || !trackType.length) {\n      return;\n    } // 1 is video, 2 is audio, 17 is subtitle\n    // other values are unimportant in this context\n\n\n    if (trackType[0] === 1) {\n      trackType = 'video';\n    } else if (trackType[0] === 2) {\n      trackType = 'audio';\n    } else if (trackType[0] === 17) {\n      trackType = 'subtitle';\n    } else {\n      return;\n    } // todo parse language\n\n\n    var decodedTrack = {\n      rawCodec: bytesToString(findEbml(track, [EBML_TAGS.CodecID])[0]),\n      type: trackType,\n      codecPrivate: findEbml(track, [EBML_TAGS.CodecPrivate])[0],\n      number: bytesToNumber(findEbml(track, [EBML_TAGS.TrackNumber])[0]),\n      defaultDuration: bytesToNumber(findEbml(track, [EBML_TAGS.DefaultDuration])[0]),\n      default: findEbml(track, [EBML_TAGS.FlagDefault])[0],\n      rawData: track\n    };\n    var codec = '';\n\n    if (/V_MPEG4\\/ISO\\/AVC/.test(decodedTrack.rawCodec)) {\n      codec = \"avc1.\" + getAvcCodec(decodedTrack.codecPrivate);\n    } else if (/V_MPEGH\\/ISO\\/HEVC/.test(decodedTrack.rawCodec)) {\n      codec = \"hev1.\" + getHvcCodec(decodedTrack.codecPrivate);\n    } else if (/V_MPEG4\\/ISO\\/ASP/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        codec = 'mp4v.20.' + decodedTrack.codecPrivate[4].toString();\n      } else {\n        codec = 'mp4v.20.9';\n      }\n    } else if (/^V_THEORA/.test(decodedTrack.rawCodec)) {\n      codec = 'theora';\n    } else if (/^V_VP8/.test(decodedTrack.rawCodec)) {\n      codec = 'vp8';\n    } else if (/^V_VP9/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        var _parseVp9Private = parseVp9Private(decodedTrack.codecPrivate),\n            profile = _parseVp9Private.profile,\n            level = _parseVp9Private.level,\n            bitDepth = _parseVp9Private.bitDepth,\n            chromaSubsampling = _parseVp9Private.chromaSubsampling;\n\n        codec = 'vp09.';\n        codec += padStart(profile, 2, '0') + \".\";\n        codec += padStart(level, 2, '0') + \".\";\n        codec += padStart(bitDepth, 2, '0') + \".\";\n        codec += \"\" + padStart(chromaSubsampling, 2, '0'); // Video -> Colour -> Ebml name\n\n        var matrixCoefficients = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xB1]])[0] || [];\n        var videoFullRangeFlag = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xB9]])[0] || [];\n        var transferCharacteristics = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xBA]])[0] || [];\n        var colourPrimaries = findEbml(track, [0xE0, [0x55, 0xB0], [0x55, 0xBB]])[0] || []; // if we find any optional codec parameter specify them all.\n\n        if (matrixCoefficients.length || videoFullRangeFlag.length || transferCharacteristics.length || colourPrimaries.length) {\n          codec += \".\" + padStart(colourPrimaries[0], 2, '0');\n          codec += \".\" + padStart(transferCharacteristics[0], 2, '0');\n          codec += \".\" + padStart(matrixCoefficients[0], 2, '0');\n          codec += \".\" + padStart(videoFullRangeFlag[0], 2, '0');\n        }\n      } else {\n        codec = 'vp9';\n      }\n    } else if (/^V_AV1/.test(decodedTrack.rawCodec)) {\n      codec = \"av01.\" + getAv1Codec(decodedTrack.codecPrivate);\n    } else if (/A_ALAC/.test(decodedTrack.rawCodec)) {\n      codec = 'alac';\n    } else if (/A_MPEG\\/L2/.test(decodedTrack.rawCodec)) {\n      codec = 'mp2';\n    } else if (/A_MPEG\\/L3/.test(decodedTrack.rawCodec)) {\n      codec = 'mp3';\n    } else if (/^A_AAC/.test(decodedTrack.rawCodec)) {\n      if (decodedTrack.codecPrivate) {\n        codec = 'mp4a.40.' + (decodedTrack.codecPrivate[0] >>> 3).toString();\n      } else {\n        codec = 'mp4a.40.2';\n      }\n    } else if (/^A_AC3/.test(decodedTrack.rawCodec)) {\n      codec = 'ac-3';\n    } else if (/^A_PCM/.test(decodedTrack.rawCodec)) {\n      codec = 'pcm';\n    } else if (/^A_MS\\/ACM/.test(decodedTrack.rawCodec)) {\n      codec = 'speex';\n    } else if (/^A_EAC3/.test(decodedTrack.rawCodec)) {\n      codec = 'ec-3';\n    } else if (/^A_VORBIS/.test(decodedTrack.rawCodec)) {\n      codec = 'vorbis';\n    } else if (/^A_FLAC/.test(decodedTrack.rawCodec)) {\n      codec = 'flac';\n    } else if (/^A_OPUS/.test(decodedTrack.rawCodec)) {\n      codec = 'opus';\n    }\n\n    decodedTrack.codec = codec;\n    decodedTracks.push(decodedTrack);\n  });\n  return decodedTracks.sort(function (a, b) {\n    return a.number - b.number;\n  });\n};\nexport var parseData = function parseData(data, tracks) {\n  var allBlocks = [];\n  var segment = findEbml(data, [EBML_TAGS.Segment])[0];\n  var timestampScale = findEbml(segment, [EBML_TAGS.SegmentInfo, EBML_TAGS.TimestampScale])[0]; // in nanoseconds, defaults to 1ms\n\n  if (timestampScale && timestampScale.length) {\n    timestampScale = bytesToNumber(timestampScale);\n  } else {\n    timestampScale = 1000000;\n  }\n\n  var clusters = findEbml(segment, [EBML_TAGS.Cluster]);\n\n  if (!tracks) {\n    tracks = parseTracks(segment);\n  }\n\n  clusters.forEach(function (cluster, ci) {\n    var simpleBlocks = findEbml(cluster, [EBML_TAGS.SimpleBlock]).map(function (b) {\n      return {\n        type: 'simple',\n        data: b\n      };\n    });\n    var blockGroups = findEbml(cluster, [EBML_TAGS.BlockGroup]).map(function (b) {\n      return {\n        type: 'group',\n        data: b\n      };\n    });\n    var timestamp = findEbml(cluster, [EBML_TAGS.Timestamp])[0] || 0;\n\n    if (timestamp && timestamp.length) {\n      timestamp = bytesToNumber(timestamp);\n    } // get all blocks then sort them into the correct order\n\n\n    var blocks = simpleBlocks.concat(blockGroups).sort(function (a, b) {\n      return a.data.byteOffset - b.data.byteOffset;\n    });\n    blocks.forEach(function (block, bi) {\n      var decoded = decodeBlock(block.data, block.type, timestampScale, timestamp);\n      allBlocks.push(decoded);\n    });\n  });\n  return {\n    tracks: tracks,\n    blocks: allBlocks\n  };\n};","import { bytesMatch, toUint8 } from './byte-helpers.js';\nexport var NAL_TYPE_ONE = toUint8([0x00, 0x00, 0x00, 0x01]);\nexport var NAL_TYPE_TWO = toUint8([0x00, 0x00, 0x01]);\nexport var EMULATION_PREVENTION = toUint8([0x00, 0x00, 0x03]);\n/**\n * Expunge any \"Emulation Prevention\" bytes from a \"Raw Byte\n * Sequence Payload\"\n *\n * @param data {Uint8Array} the bytes of a RBSP from a NAL\n * unit\n * @return {Uint8Array} the RBSP without any Emulation\n * Prevention Bytes\n */\n\nexport var discardEmulationPreventionBytes = function discardEmulationPreventionBytes(bytes) {\n  var positions = [];\n  var i = 1; // Find all `Emulation Prevention Bytes`\n\n  while (i < bytes.length - 2) {\n    if (bytesMatch(bytes.subarray(i, i + 3), EMULATION_PREVENTION)) {\n      positions.push(i + 2);\n      i++;\n    }\n\n    i++;\n  } // If no Emulation Prevention Bytes were found just return the original\n  // array\n\n\n  if (positions.length === 0) {\n    return bytes;\n  } // Create a new array to hold the NAL unit data\n\n\n  var newLength = bytes.length - positions.length;\n  var newData = new Uint8Array(newLength);\n  var sourceIndex = 0;\n\n  for (i = 0; i < newLength; sourceIndex++, i++) {\n    if (sourceIndex === positions[0]) {\n      // Skip this byte\n      sourceIndex++; // Remove this position index\n\n      positions.shift();\n    }\n\n    newData[i] = bytes[sourceIndex];\n  }\n\n  return newData;\n};\nexport var findNal = function findNal(bytes, dataType, types, nalLimit) {\n  if (nalLimit === void 0) {\n    nalLimit = Infinity;\n  }\n\n  bytes = toUint8(bytes);\n  types = [].concat(types);\n  var i = 0;\n  var nalStart;\n  var nalsFound = 0; // keep searching until:\n  // we reach the end of bytes\n  // we reach the maximum number of nals they want to seach\n  // NOTE: that we disregard nalLimit when we have found the start\n  // of the nal we want so that we can find the end of the nal we want.\n\n  while (i < bytes.length && (nalsFound < nalLimit || nalStart)) {\n    var nalOffset = void 0;\n\n    if (bytesMatch(bytes.subarray(i), NAL_TYPE_ONE)) {\n      nalOffset = 4;\n    } else if (bytesMatch(bytes.subarray(i), NAL_TYPE_TWO)) {\n      nalOffset = 3;\n    } // we are unsynced,\n    // find the next nal unit\n\n\n    if (!nalOffset) {\n      i++;\n      continue;\n    }\n\n    nalsFound++;\n\n    if (nalStart) {\n      return discardEmulationPreventionBytes(bytes.subarray(nalStart, i));\n    }\n\n    var nalType = void 0;\n\n    if (dataType === 'h264') {\n      nalType = bytes[i + nalOffset] & 0x1f;\n    } else if (dataType === 'h265') {\n      nalType = bytes[i + nalOffset] >> 1 & 0x3f;\n    }\n\n    if (types.indexOf(nalType) !== -1) {\n      nalStart = i + nalOffset;\n    } // nal header is 1 length for h264, and 2 for h265\n\n\n    i += nalOffset + (dataType === 'h264' ? 1 : 2);\n  }\n\n  return bytes.subarray(0, 0);\n};\nexport var findH264Nal = function findH264Nal(bytes, type, nalLimit) {\n  return findNal(bytes, 'h264', type, nalLimit);\n};\nexport var findH265Nal = function findH265Nal(bytes, type, nalLimit) {\n  return findNal(bytes, 'h265', type, nalLimit);\n};","import { toUint8, bytesMatch } from './byte-helpers.js';\nimport { findBox } from './mp4-helpers.js';\nimport { findEbml, EBML_TAGS } from './ebml-helpers.js';\nimport { getId3Offset } from './id3-helpers.js';\nimport { findH264Nal, findH265Nal } from './nal-helpers.js';\nvar CONSTANTS = {\n  // \"webm\" string literal in hex\n  'webm': toUint8([0x77, 0x65, 0x62, 0x6d]),\n  // \"matroska\" string literal in hex\n  'matroska': toUint8([0x6d, 0x61, 0x74, 0x72, 0x6f, 0x73, 0x6b, 0x61]),\n  // \"fLaC\" string literal in hex\n  'flac': toUint8([0x66, 0x4c, 0x61, 0x43]),\n  // \"OggS\" string literal in hex\n  'ogg': toUint8([0x4f, 0x67, 0x67, 0x53]),\n  // ac-3 sync byte, also works for ec-3 as that is simply a codec\n  // of ac-3\n  'ac3': toUint8([0x0b, 0x77]),\n  // \"RIFF\" string literal in hex used for wav and avi\n  'riff': toUint8([0x52, 0x49, 0x46, 0x46]),\n  // \"AVI\" string literal in hex\n  'avi': toUint8([0x41, 0x56, 0x49]),\n  // \"WAVE\" string literal in hex\n  'wav': toUint8([0x57, 0x41, 0x56, 0x45]),\n  // \"ftyp3g\" string literal in hex\n  '3gp': toUint8([0x66, 0x74, 0x79, 0x70, 0x33, 0x67]),\n  // \"ftyp\" string literal in hex\n  'mp4': toUint8([0x66, 0x74, 0x79, 0x70]),\n  // \"styp\" string literal in hex\n  'fmp4': toUint8([0x73, 0x74, 0x79, 0x70]),\n  // \"ftypqt\" string literal in hex\n  'mov': toUint8([0x66, 0x74, 0x79, 0x70, 0x71, 0x74]),\n  // moov string literal in hex\n  'moov': toUint8([0x6D, 0x6F, 0x6F, 0x76]),\n  // moof string literal in hex\n  'moof': toUint8([0x6D, 0x6F, 0x6F, 0x66])\n};\nvar _isLikely = {\n  aac: function aac(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, [0xFF, 0x10], {\n      offset: offset,\n      mask: [0xFF, 0x16]\n    });\n  },\n  mp3: function mp3(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, [0xFF, 0x02], {\n      offset: offset,\n      mask: [0xFF, 0x06]\n    });\n  },\n  webm: function webm(bytes) {\n    var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is webm\n\n    return bytesMatch(docType, CONSTANTS.webm);\n  },\n  mkv: function mkv(bytes) {\n    var docType = findEbml(bytes, [EBML_TAGS.EBML, EBML_TAGS.DocType])[0]; // check if DocType EBML tag is matroska\n\n    return bytesMatch(docType, CONSTANTS.matroska);\n  },\n  mp4: function mp4(bytes) {\n    // if this file is another base media file format, it is not mp4\n    if (_isLikely['3gp'](bytes) || _isLikely.mov(bytes)) {\n      return false;\n    } // if this file starts with a ftyp or styp box its mp4\n\n\n    if (bytesMatch(bytes, CONSTANTS.mp4, {\n      offset: 4\n    }) || bytesMatch(bytes, CONSTANTS.fmp4, {\n      offset: 4\n    })) {\n      return true;\n    } // if this file starts with a moof/moov box its mp4\n\n\n    if (bytesMatch(bytes, CONSTANTS.moof, {\n      offset: 4\n    }) || bytesMatch(bytes, CONSTANTS.moov, {\n      offset: 4\n    })) {\n      return true;\n    }\n  },\n  mov: function mov(bytes) {\n    return bytesMatch(bytes, CONSTANTS.mov, {\n      offset: 4\n    });\n  },\n  '3gp': function gp(bytes) {\n    return bytesMatch(bytes, CONSTANTS['3gp'], {\n      offset: 4\n    });\n  },\n  ac3: function ac3(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, CONSTANTS.ac3, {\n      offset: offset\n    });\n  },\n  ts: function ts(bytes) {\n    if (bytes.length < 189 && bytes.length >= 1) {\n      return bytes[0] === 0x47;\n    }\n\n    var i = 0; // check the first 376 bytes for two matching sync bytes\n\n    while (i + 188 < bytes.length && i < 188) {\n      if (bytes[i] === 0x47 && bytes[i + 188] === 0x47) {\n        return true;\n      }\n\n      i += 1;\n    }\n\n    return false;\n  },\n  flac: function flac(bytes) {\n    var offset = getId3Offset(bytes);\n    return bytesMatch(bytes, CONSTANTS.flac, {\n      offset: offset\n    });\n  },\n  ogg: function ogg(bytes) {\n    return bytesMatch(bytes, CONSTANTS.ogg);\n  },\n  avi: function avi(bytes) {\n    return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.avi, {\n      offset: 8\n    });\n  },\n  wav: function wav(bytes) {\n    return bytesMatch(bytes, CONSTANTS.riff) && bytesMatch(bytes, CONSTANTS.wav, {\n      offset: 8\n    });\n  },\n  'h264': function h264(bytes) {\n    // find seq_parameter_set_rbsp\n    return findH264Nal(bytes, 7, 3).length;\n  },\n  'h265': function h265(bytes) {\n    // find video_parameter_set_rbsp or seq_parameter_set_rbsp\n    return findH265Nal(bytes, [32, 33], 3).length;\n  }\n}; // get all the isLikely functions\n// but make sure 'ts' is above h264 and h265\n// but below everything else as it is the least specific\n\nvar isLikelyTypes = Object.keys(_isLikely) // remove ts, h264, h265\n.filter(function (t) {\n  return t !== 'ts' && t !== 'h264' && t !== 'h265';\n}) // add it back to the bottom\n.concat(['ts', 'h264', 'h265']); // make sure we are dealing with uint8 data.\n\nisLikelyTypes.forEach(function (type) {\n  var isLikelyFn = _isLikely[type];\n\n  _isLikely[type] = function (bytes) {\n    return isLikelyFn(toUint8(bytes));\n  };\n}); // export after wrapping\n\nexport var isLikely = _isLikely; // A useful list of file signatures can be found here\n// https://en.wikipedia.org/wiki/List_of_file_signatures\n\nexport var detectContainerForBytes = function detectContainerForBytes(bytes) {\n  bytes = toUint8(bytes);\n\n  for (var i = 0; i < isLikelyTypes.length; i++) {\n    var type = isLikelyTypes[i];\n\n    if (isLikely[type](bytes)) {\n      return type;\n    }\n  }\n\n  return '';\n}; // fmp4 is not a container\n\nexport var isLikelyFmp4MediaSegment = function isLikelyFmp4MediaSegment(bytes) {\n  return findBox(bytes, ['moof']).length > 0;\n};","/**\n * Copyright 2013 vtt.js Contributors\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nvar scrollSetting = {\n  \"\": true,\n  \"up\": true\n};\n\nfunction findScrollSetting(value) {\n  if (typeof value !== \"string\") {\n    return false;\n  }\n  var scroll = scrollSetting[value.toLowerCase()];\n  return scroll ? value.toLowerCase() : false;\n}\n\nfunction isValidPercentValue(value) {\n  return typeof value === \"number\" && (value >= 0 && value <= 100);\n}\n\n// VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface\nfunction VTTRegion() {\n  var _width = 100;\n  var _lines = 3;\n  var _regionAnchorX = 0;\n  var _regionAnchorY = 100;\n  var _viewportAnchorX = 0;\n  var _viewportAnchorY = 100;\n  var _scroll = \"\";\n\n  Object.defineProperties(this, {\n    \"width\": {\n      enumerable: true,\n      get: function() {\n        return _width;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"Width must be between 0 and 100.\");\n        }\n        _width = value;\n      }\n    },\n    \"lines\": {\n      enumerable: true,\n      get: function() {\n        return _lines;\n      },\n      set: function(value) {\n        if (typeof value !== \"number\") {\n          throw new TypeError(\"Lines must be set to a number.\");\n        }\n        _lines = value;\n      }\n    },\n    \"regionAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorX must be between 0 and 100.\");\n        }\n        _regionAnchorY = value;\n      }\n    },\n    \"regionAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _regionAnchorX;\n      },\n      set: function(value) {\n        if(!isValidPercentValue(value)) {\n          throw new Error(\"RegionAnchorY must be between 0 and 100.\");\n        }\n        _regionAnchorX = value;\n      }\n    },\n    \"viewportAnchorY\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorY;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorY must be between 0 and 100.\");\n        }\n        _viewportAnchorY = value;\n      }\n    },\n    \"viewportAnchorX\": {\n      enumerable: true,\n      get: function() {\n        return _viewportAnchorX;\n      },\n      set: function(value) {\n        if (!isValidPercentValue(value)) {\n          throw new Error(\"ViewportAnchorX must be between 0 and 100.\");\n        }\n        _viewportAnchorX = value;\n      }\n    },\n    \"scroll\": {\n      enumerable: true,\n      get: function() {\n        return _scroll;\n      },\n      set: function(value) {\n        var setting = findScrollSetting(value);\n        // Have to check for false as an empty string is a legal value.\n        if (setting === false) {\n          console.warn(\"Scroll: an invalid or illegal string was specified.\");\n        } else {\n          _scroll = setting;\n        }\n      }\n    }\n  });\n}\n\nmodule.exports = VTTRegion;\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar R = typeof Reflect === 'object' ? Reflect : null\nvar ReflectApply = R && typeof R.apply === 'function'\n  ? R.apply\n  : function ReflectApply(target, receiver, args) {\n    return Function.prototype.apply.call(target, receiver, args);\n  }\n\nvar ReflectOwnKeys\nif (R && typeof R.ownKeys === 'function') {\n  ReflectOwnKeys = R.ownKeys\n} else if (Object.getOwnPropertySymbols) {\n  ReflectOwnKeys = function ReflectOwnKeys(target) {\n    return Object.getOwnPropertyNames(target)\n      .concat(Object.getOwnPropertySymbols(target));\n  };\n} else {\n  ReflectOwnKeys = function ReflectOwnKeys(target) {\n    return Object.getOwnPropertyNames(target);\n  };\n}\n\nfunction ProcessEmitWarning(warning) {\n  if (console && console.warn) console.warn(warning);\n}\n\nvar NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {\n  return value !== value;\n}\n\nfunction EventEmitter() {\n  EventEmitter.init.call(this);\n}\nmodule.exports = EventEmitter;\nmodule.exports.once = once;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._eventsCount = 0;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nvar defaultMaxListeners = 10;\n\nfunction checkListener(listener) {\n  if (typeof listener !== 'function') {\n    throw new TypeError('The \"listener\" argument must be of type Function. Received type ' + typeof listener);\n  }\n}\n\nObject.defineProperty(EventEmitter, 'defaultMaxListeners', {\n  enumerable: true,\n  get: function() {\n    return defaultMaxListeners;\n  },\n  set: function(arg) {\n    if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {\n      throw new RangeError('The value of \"defaultMaxListeners\" is out of range. It must be a non-negative number. Received ' + arg + '.');\n    }\n    defaultMaxListeners = arg;\n  }\n});\n\nEventEmitter.init = function() {\n\n  if (this._events === undefined ||\n      this._events === Object.getPrototypeOf(this)._events) {\n    this._events = Object.create(null);\n    this._eventsCount = 0;\n  }\n\n  this._maxListeners = this._maxListeners || undefined;\n};\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {\n  if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {\n    throw new RangeError('The value of \"n\" is out of range. It must be a non-negative number. Received ' + n + '.');\n  }\n  this._maxListeners = n;\n  return this;\n};\n\nfunction _getMaxListeners(that) {\n  if (that._maxListeners === undefined)\n    return EventEmitter.defaultMaxListeners;\n  return that._maxListeners;\n}\n\nEventEmitter.prototype.getMaxListeners = function getMaxListeners() {\n  return _getMaxListeners(this);\n};\n\nEventEmitter.prototype.emit = function emit(type) {\n  var args = [];\n  for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);\n  var doError = (type === 'error');\n\n  var events = this._events;\n  if (events !== undefined)\n    doError = (doError && events.error === undefined);\n  else if (!doError)\n    return false;\n\n  // If there is no 'error' event listener then throw.\n  if (doError) {\n    var er;\n    if (args.length > 0)\n      er = args[0];\n    if (er instanceof Error) {\n      // Note: The comments on the `throw` lines are intentional, they show\n      // up in Node's output if this results in an unhandled exception.\n      throw er; // Unhandled 'error' event\n    }\n    // At least give some kind of context to the user\n    var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));\n    err.context = er;\n    throw err; // Unhandled 'error' event\n  }\n\n  var handler = events[type];\n\n  if (handler === undefined)\n    return false;\n\n  if (typeof handler === 'function') {\n    ReflectApply(handler, this, args);\n  } else {\n    var len = handler.length;\n    var listeners = arrayClone(handler, len);\n    for (var i = 0; i < len; ++i)\n      ReflectApply(listeners[i], this, args);\n  }\n\n  return true;\n};\n\nfunction _addListener(target, type, listener, prepend) {\n  var m;\n  var events;\n  var existing;\n\n  checkListener(listener);\n\n  events = target._events;\n  if (events === undefined) {\n    events = target._events = Object.create(null);\n    target._eventsCount = 0;\n  } else {\n    // To avoid recursion in the case that type === \"newListener\"! Before\n    // adding it to the listeners, first emit \"newListener\".\n    if (events.newListener !== undefined) {\n      target.emit('newListener', type,\n                  listener.listener ? listener.listener : listener);\n\n      // Re-assign `events` because a newListener handler could have caused the\n      // this._events to be assigned to a new object\n      events = target._events;\n    }\n    existing = events[type];\n  }\n\n  if (existing === undefined) {\n    // Optimize the case of one listener. Don't need the extra array object.\n    existing = events[type] = listener;\n    ++target._eventsCount;\n  } else {\n    if (typeof existing === 'function') {\n      // Adding the second element, need to change to array.\n      existing = events[type] =\n        prepend ? [listener, existing] : [existing, listener];\n      // If we've already got an array, just append.\n    } else if (prepend) {\n      existing.unshift(listener);\n    } else {\n      existing.push(listener);\n    }\n\n    // Check for listener leak\n    m = _getMaxListeners(target);\n    if (m > 0 && existing.length > m && !existing.warned) {\n      existing.warned = true;\n      // No error code for this since it is a Warning\n      // eslint-disable-next-line no-restricted-syntax\n      var w = new Error('Possible EventEmitter memory leak detected. ' +\n                          existing.length + ' ' + String(type) + ' listeners ' +\n                          'added. Use emitter.setMaxListeners() to ' +\n                          'increase limit');\n      w.name = 'MaxListenersExceededWarning';\n      w.emitter = target;\n      w.type = type;\n      w.count = existing.length;\n      ProcessEmitWarning(w);\n    }\n  }\n\n  return target;\n}\n\nEventEmitter.prototype.addListener = function addListener(type, listener) {\n  return _addListener(this, type, listener, false);\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.prependListener =\n    function prependListener(type, listener) {\n      return _addListener(this, type, listener, true);\n    };\n\nfunction onceWrapper() {\n  if (!this.fired) {\n    this.target.removeListener(this.type, this.wrapFn);\n    this.fired = true;\n    if (arguments.length === 0)\n      return this.listener.call(this.target);\n    return this.listener.apply(this.target, arguments);\n  }\n}\n\nfunction _onceWrap(target, type, listener) {\n  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };\n  var wrapped = onceWrapper.bind(state);\n  wrapped.listener = listener;\n  state.wrapFn = wrapped;\n  return wrapped;\n}\n\nEventEmitter.prototype.once = function once(type, listener) {\n  checkListener(listener);\n  this.on(type, _onceWrap(this, type, listener));\n  return this;\n};\n\nEventEmitter.prototype.prependOnceListener =\n    function prependOnceListener(type, listener) {\n      checkListener(listener);\n      this.prependListener(type, _onceWrap(this, type, listener));\n      return this;\n    };\n\n// Emits a 'removeListener' event if and only if the listener was removed.\nEventEmitter.prototype.removeListener =\n    function removeListener(type, listener) {\n      var list, events, position, i, originalListener;\n\n      checkListener(listener);\n\n      events = this._events;\n      if (events === undefined)\n        return this;\n\n      list = events[type];\n      if (list === undefined)\n        return this;\n\n      if (list === listener || list.listener === listener) {\n        if (--this._eventsCount === 0)\n          this._events = Object.create(null);\n        else {\n          delete events[type];\n          if (events.removeListener)\n            this.emit('removeListener', type, list.listener || listener);\n        }\n      } else if (typeof list !== 'function') {\n        position = -1;\n\n        for (i = list.length - 1; i >= 0; i--) {\n          if (list[i] === listener || list[i].listener === listener) {\n            originalListener = list[i].listener;\n            position = i;\n            break;\n          }\n        }\n\n        if (position < 0)\n          return this;\n\n        if (position === 0)\n          list.shift();\n        else {\n          spliceOne(list, position);\n        }\n\n        if (list.length === 1)\n          events[type] = list[0];\n\n        if (events.removeListener !== undefined)\n          this.emit('removeListener', type, originalListener || listener);\n      }\n\n      return this;\n    };\n\nEventEmitter.prototype.off = EventEmitter.prototype.removeListener;\n\nEventEmitter.prototype.removeAllListeners =\n    function removeAllListeners(type) {\n      var listeners, events, i;\n\n      events = this._events;\n      if (events === undefined)\n        return this;\n\n      // not listening for removeListener, no need to emit\n      if (events.removeListener === undefined) {\n        if (arguments.length === 0) {\n          this._events = Object.create(null);\n          this._eventsCount = 0;\n        } else if (events[type] !== undefined) {\n          if (--this._eventsCount === 0)\n            this._events = Object.create(null);\n          else\n            delete events[type];\n        }\n        return this;\n      }\n\n      // emit removeListener for all listeners on all events\n      if (arguments.length === 0) {\n        var keys = Object.keys(events);\n        var key;\n        for (i = 0; i < keys.length; ++i) {\n          key = keys[i];\n          if (key === 'removeListener') continue;\n          this.removeAllListeners(key);\n        }\n        this.removeAllListeners('removeListener');\n        this._events = Object.create(null);\n        this._eventsCount = 0;\n        return this;\n      }\n\n      listeners = events[type];\n\n      if (typeof listeners === 'function') {\n        this.removeListener(type, listeners);\n      } else if (listeners !== undefined) {\n        // LIFO order\n        for (i = listeners.length - 1; i >= 0; i--) {\n          this.removeListener(type, listeners[i]);\n        }\n      }\n\n      return this;\n    };\n\nfunction _listeners(target, type, unwrap) {\n  var events = target._events;\n\n  if (events === undefined)\n    return [];\n\n  var evlistener = events[type];\n  if (evlistener === undefined)\n    return [];\n\n  if (typeof evlistener === 'function')\n    return unwrap ? [evlistener.listener || evlistener] : [evlistener];\n\n  return unwrap ?\n    unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);\n}\n\nEventEmitter.prototype.listeners = function listeners(type) {\n  return _listeners(this, type, true);\n};\n\nEventEmitter.prototype.rawListeners = function rawListeners(type) {\n  return _listeners(this, type, false);\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  if (typeof emitter.listenerCount === 'function') {\n    return emitter.listenerCount(type);\n  } else {\n    return listenerCount.call(emitter, type);\n  }\n};\n\nEventEmitter.prototype.listenerCount = listenerCount;\nfunction listenerCount(type) {\n  var events = this._events;\n\n  if (events !== undefined) {\n    var evlistener = events[type];\n\n    if (typeof evlistener === 'function') {\n      return 1;\n    } else if (evlistener !== undefined) {\n      return evlistener.length;\n    }\n  }\n\n  return 0;\n}\n\nEventEmitter.prototype.eventNames = function eventNames() {\n  return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];\n};\n\nfunction arrayClone(arr, n) {\n  var copy = new Array(n);\n  for (var i = 0; i < n; ++i)\n    copy[i] = arr[i];\n  return copy;\n}\n\nfunction spliceOne(list, index) {\n  for (; index + 1 < list.length; index++)\n    list[index] = list[index + 1];\n  list.pop();\n}\n\nfunction unwrapListeners(arr) {\n  var ret = new Array(arr.length);\n  for (var i = 0; i < ret.length; ++i) {\n    ret[i] = arr[i].listener || arr[i];\n  }\n  return ret;\n}\n\nfunction once(emitter, name) {\n  return new Promise(function (resolve, reject) {\n    function errorListener(err) {\n      emitter.removeListener(name, resolver);\n      reject(err);\n    }\n\n    function resolver() {\n      if (typeof emitter.removeListener === 'function') {\n        emitter.removeListener('error', errorListener);\n      }\n      resolve([].slice.call(arguments));\n    };\n\n    eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });\n    if (name !== 'error') {\n      addErrorHandlerIfEventEmitter(emitter, errorListener, { once: true });\n    }\n  });\n}\n\nfunction addErrorHandlerIfEventEmitter(emitter, handler, flags) {\n  if (typeof emitter.on === 'function') {\n    eventTargetAgnosticAddListener(emitter, 'error', handler, flags);\n  }\n}\n\nfunction eventTargetAgnosticAddListener(emitter, name, listener, flags) {\n  if (typeof emitter.on === 'function') {\n    if (flags.once) {\n      emitter.once(name, listener);\n    } else {\n      emitter.on(name, listener);\n    }\n  } else if (typeof emitter.addEventListener === 'function') {\n    // EventTarget does not have `error` event semantics like Node\n    // EventEmitters, we do not listen for `error` events here.\n    emitter.addEventListener(name, function wrapListener(arg) {\n      // IE does not have builtin `{ once: true }` support so we\n      // have to do it manually.\n      if (flags.once) {\n        emitter.removeEventListener(name, wrapListener);\n      }\n      listener(arg);\n    });\n  } else {\n    throw new TypeError('The \"emitter\" argument must be of type EventEmitter. Received type ' + typeof emitter);\n  }\n}\n","'use strict';\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i[\"return\"]) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); } }; }();\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nvar _stream = require('./stream');\n\nvar _stream2 = _interopRequireDefault(_stream);\n\nfunction _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self; }\n\nfunction _inherits(subClass, superClass) { if (typeof superClass !== \"function\" && superClass !== null) { throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; } /**\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                * @file m3u8/parse-stream.js\n                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                */\n\n\n/**\n * \"forgiving\" attribute list psuedo-grammar:\n * attributes -> keyvalue (',' keyvalue)*\n * keyvalue   -> key '=' value\n * key        -> [^=]*\n * value      -> '\"' [^\"]* '\"' | [^,]*\n */\nvar attributeSeparator = function attributeSeparator() {\n  var key = '[^=]*';\n  var value = '\"[^\"]*\"|[^,]*';\n  var keyvalue = '(?:' + key + ')=(?:' + value + ')';\n\n  return new RegExp('(?:^|,)(' + keyvalue + ')');\n};\n\n/**\n * Parse attributes from a line given the seperator\n *\n * @param {String} attributes the attibute line to parse\n */\nvar parseAttributes = function parseAttributes(attributes) {\n  // split the string using attributes as the separator\n  var attrs = attributes.split(attributeSeparator());\n  var result = {};\n  var i = attrs.length;\n  var attr = void 0;\n\n  while (i--) {\n    // filter out unmatched portions of the string\n    if (attrs[i] === '') {\n      continue;\n    }\n\n    // split the key and value\n    attr = /([^=]*)=(.*)/.exec(attrs[i]).slice(1);\n    // trim whitespace and remove optional quotes around the value\n    attr[0] = attr[0].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^\\s+|\\s+$/g, '');\n    attr[1] = attr[1].replace(/^['\"](.*)['\"]$/g, '$1');\n    result[attr[0]] = attr[1];\n  }\n  return result;\n};\n\n/**\n * A line-level M3U8 parser event stream. It expects to receive input one\n * line at a time and performs a context-free parse of its contents. A stream\n * interpretation of a manifest can be useful if the manifest is expected to\n * be too large to fit comfortably into memory or the entirety of the input\n * is not immediately available. Otherwise, it's probably much easier to work\n * with a regular `Parser` object.\n *\n * Produces `data` events with an object that captures the parser's\n * interpretation of the input. That object has a property `tag` that is one\n * of `uri`, `comment`, or `tag`. URIs only have a single additional\n * property, `line`, which captures the entirety of the input without\n * interpretation. Comments similarly have a single additional property\n * `text` which is the input without the leading `#`.\n *\n * Tags always have a property `tagType` which is the lower-cased version of\n * the M3U8 directive without the `#EXT` or `#EXT-X-` prefix. For instance,\n * `#EXT-X-MEDIA-SEQUENCE` becomes `media-sequence` when parsed. Unrecognized\n * tags are given the tag type `unknown` and a single additional property\n * `data` with the remainder of the input.\n *\n * @class ParseStream\n * @extends Stream\n */\n\nvar ParseStream = function (_Stream) {\n  _inherits(ParseStream, _Stream);\n\n  function ParseStream() {\n    _classCallCheck(this, ParseStream);\n\n    return _possibleConstructorReturn(this, (ParseStream.__proto__ || Object.getPrototypeOf(ParseStream)).call(this));\n  }\n\n  /**\n   * Parses an additional line of input.\n   *\n   * @param {String} line a single line of an M3U8 file to parse\n   */\n\n\n  _createClass(ParseStream, [{\n    key: 'push',\n    value: function push(line) {\n      var match = void 0;\n      var event = void 0;\n\n      // strip whitespace\n      line = line.replace(/^[\\u0000\\s]+|[\\u0000\\s]+$/g, '');\n      if (line.length === 0) {\n        // ignore empty lines\n        return;\n      }\n\n      // URIs\n      if (line[0] !== '#') {\n        this.trigger('data', {\n          type: 'uri',\n          uri: line\n        });\n        return;\n      }\n\n      // Comments\n      if (line.indexOf('#EXT') !== 0) {\n        this.trigger('data', {\n          type: 'comment',\n          text: line.slice(1)\n        });\n        return;\n      }\n\n      // strip off any carriage returns here so the regex matching\n      // doesn't have to account for them.\n      line = line.replace('\\r', '');\n\n      // Tags\n      match = /^#EXTM3U/.exec(line);\n      if (match) {\n        this.trigger('data', {\n          type: 'tag',\n          tagType: 'm3u'\n        });\n        return;\n      }\n      match = /^#EXTINF:?([0-9\\.]*)?,?(.*)?$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'inf'\n        };\n        if (match[1]) {\n          event.duration = parseFloat(match[1]);\n        }\n        if (match[2]) {\n          event.title = match[2];\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-TARGETDURATION:?([0-9.]*)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'targetduration'\n        };\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#ZEN-TOTAL-DURATION:?([0-9.]*)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'totalduration'\n        };\n        if (match[1]) {\n          event.duration = parseInt(match[1], 10);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-VERSION:?([0-9.]*)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'version'\n        };\n        if (match[1]) {\n          event.version = parseInt(match[1], 10);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-MEDIA-SEQUENCE:?(\\-?[0-9.]*)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media-sequence'\n        };\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-DISCONTINUITY-SEQUENCE:?(\\-?[0-9.]*)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'discontinuity-sequence'\n        };\n        if (match[1]) {\n          event.number = parseInt(match[1], 10);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-PLAYLIST-TYPE:?(.*)?$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'playlist-type'\n        };\n        if (match[1]) {\n          event.playlistType = match[1];\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-BYTERANGE:?([0-9.]*)?@?([0-9.]*)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'byterange'\n        };\n        if (match[1]) {\n          event.length = parseInt(match[1], 10);\n        }\n        if (match[2]) {\n          event.offset = parseInt(match[2], 10);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-ALLOW-CACHE:?(YES|NO)?/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'allow-cache'\n        };\n        if (match[1]) {\n          event.allowed = !/NO/.test(match[1]);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-MAP:?(.*)$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'map'\n        };\n\n        if (match[1]) {\n          var attributes = parseAttributes(match[1]);\n\n          if (attributes.URI) {\n            event.uri = attributes.URI;\n          }\n          if (attributes.BYTERANGE) {\n            var _attributes$BYTERANGE = attributes.BYTERANGE.split('@'),\n                _attributes$BYTERANGE2 = _slicedToArray(_attributes$BYTERANGE, 2),\n                length = _attributes$BYTERANGE2[0],\n                offset = _attributes$BYTERANGE2[1];\n\n            event.byterange = {};\n            if (length) {\n              event.byterange.length = parseInt(length, 10);\n            }\n            if (offset) {\n              event.byterange.offset = parseInt(offset, 10);\n            }\n          }\n        }\n\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-STREAM-INF:?(.*)$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'stream-inf'\n        };\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n\n          if (event.attributes.RESOLUTION) {\n            var split = event.attributes.RESOLUTION.split('x');\n            var resolution = {};\n\n            if (split[0]) {\n              resolution.width = parseInt(split[0], 10);\n            }\n            if (split[1]) {\n              resolution.height = parseInt(split[1], 10);\n            }\n            event.attributes.RESOLUTION = resolution;\n          }\n          if (event.attributes.BANDWIDTH) {\n            event.attributes.BANDWIDTH = parseInt(event.attributes.BANDWIDTH, 10);\n          }\n          if (event.attributes['PROGRAM-ID']) {\n            event.attributes['PROGRAM-ID'] = parseInt(event.attributes['PROGRAM-ID'], 10);\n          }\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-MEDIA:?(.*)$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'media'\n        };\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-ENDLIST/.exec(line);\n      if (match) {\n        this.trigger('data', {\n          type: 'tag',\n          tagType: 'endlist'\n        });\n        return;\n      }\n      match = /^#EXT-X-DISCONTINUITY/.exec(line);\n      if (match) {\n        this.trigger('data', {\n          type: 'tag',\n          tagType: 'discontinuity'\n        });\n        return;\n      }\n      match = /^#EXT-X-PROGRAM-DATE-TIME:?(.*)$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'program-date-time'\n        };\n        if (match[1]) {\n          event.dateTimeString = match[1];\n          event.dateTimeObject = new Date(match[1]);\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-KEY:?(.*)$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'key'\n        };\n        if (match[1]) {\n          event.attributes = parseAttributes(match[1]);\n          // parse the IV string into a Uint32Array\n          if (event.attributes.IV) {\n            if (event.attributes.IV.substring(0, 2).toLowerCase() === '0x') {\n              event.attributes.IV = event.attributes.IV.substring(2);\n            }\n\n            event.attributes.IV = event.attributes.IV.match(/.{8}/g);\n            event.attributes.IV[0] = parseInt(event.attributes.IV[0], 16);\n            event.attributes.IV[1] = parseInt(event.attributes.IV[1], 16);\n            event.attributes.IV[2] = parseInt(event.attributes.IV[2], 16);\n            event.attributes.IV[3] = parseInt(event.attributes.IV[3], 16);\n            event.attributes.IV = new Uint32Array(event.attributes.IV);\n          }\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-CUE-OUT-CONT:?(.*)?$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out-cont'\n        };\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-CUE-OUT:?(.*)?$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-out'\n        };\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n        this.trigger('data', event);\n        return;\n      }\n      match = /^#EXT-X-CUE-IN:?(.*)?$/.exec(line);\n      if (match) {\n        event = {\n          type: 'tag',\n          tagType: 'cue-in'\n        };\n        if (match[1]) {\n          event.data = match[1];\n        } else {\n          event.data = '';\n        }\n        this.trigger('data', event);\n        return;\n      }\n\n      // unknown tag type\n      this.trigger('data', {\n        type: 'tag',\n        data: line.slice(4)\n      });\n    }\n  }]);\n\n  return ParseStream;\n}(_stream2['default']);\n\nexports['default'] = ParseStream;","'use strict';\nvar $ = require('../internals/export');\nvar isObject = require('../internals/is-object');\nvar isArray = require('../internals/is-array');\nvar toAbsoluteIndex = require('../internals/to-absolute-index');\nvar toLength = require('../internals/to-length');\nvar toIndexedObject = require('../internals/to-indexed-object');\nvar createProperty = require('../internals/create-property');\nvar wellKnownSymbol = require('../internals/well-known-symbol');\nvar arrayMethodHasSpeciesSupport = require('../internals/array-method-has-species-support');\n\nvar HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('slice');\n\nvar SPECIES = wellKnownSymbol('species');\nvar nativeSlice = [].slice;\nvar max = Math.max;\n\n// `Array.prototype.slice` method\n// https://tc39.es/ecma262/#sec-array.prototype.slice\n// fallback for not array-like ES3 strings and DOM objects\n$({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {\n  slice: function slice(start, end) {\n    var O = toIndexedObject(this);\n    var length = toLength(O.length);\n    var k = toAbsoluteIndex(start, length);\n    var fin = toAbsoluteIndex(end === undefined ? length : end, length);\n    // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible\n    var Constructor, result, n;\n    if (isArray(O)) {\n      Constructor = O.constructor;\n      // cross-realm fallback\n      if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {\n        Constructor = undefined;\n      } else if (isObject(Constructor)) {\n        Constructor = Constructor[SPECIES];\n        if (Constructor === null) Constructor = undefined;\n      }\n      if (Constructor === Array || Constructor === undefined) {\n        return nativeSlice.call(O, k, fin);\n      }\n    }\n    result = new (Constructor === undefined ? Array : Constructor)(max(fin - k, 0));\n    for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);\n    result.length = n;\n    return result;\n  }\n});\n","// Ported from https://github.com/mafintosh/pump with\n// permission from the author, Mathias Buus (@mafintosh).\n'use strict';\n\nvar eos;\n\nfunction once(callback) {\n  var called = false;\n  return function () {\n    if (called) return;\n    called = true;\n    callback.apply(void 0, arguments);\n  };\n}\n\nvar _require$codes = require('../../../errors').codes,\n    ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,\n    ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;\n\nfunction noop(err) {\n  // Rethrow the error if it exists to avoid swallowing it\n  if (err) throw err;\n}\n\nfunction isRequest(stream) {\n  return stream.setHeader && typeof stream.abort === 'function';\n}\n\nfunction destroyer(stream, reading, writing, callback) {\n  callback = once(callback);\n  var closed = false;\n  stream.on('close', function () {\n    closed = true;\n  });\n  if (eos === undefined) eos = require('./end-of-stream');\n  eos(stream, {\n    readable: reading,\n    writable: writing\n  }, function (err) {\n    if (err) return callback(err);\n    closed = true;\n    callback();\n  });\n  var destroyed = false;\n  return function (err) {\n    if (closed) return;\n    if (destroyed) return;\n    destroyed = true; // request.destroy just do .end - .abort is what we want\n\n    if (isRequest(stream)) return stream.abort();\n    if (typeof stream.destroy === 'function') return stream.destroy();\n    callback(err || new ERR_STREAM_DESTROYED('pipe'));\n  };\n}\n\nfunction call(fn) {\n  fn();\n}\n\nfunction pipe(from, to) {\n  return from.pipe(to);\n}\n\nfunction popCallback(streams) {\n  if (!streams.length) return noop;\n  if (typeof streams[streams.length - 1] !== 'function') return noop;\n  return streams.pop();\n}\n\nfunction pipeline() {\n  for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {\n    streams[_key] = arguments[_key];\n  }\n\n  var callback = popCallback(streams);\n  if (Array.isArray(streams[0])) streams = streams[0];\n\n  if (streams.length < 2) {\n    throw new ERR_MISSING_ARGS('streams');\n  }\n\n  var error;\n  var destroys = streams.map(function (stream, i) {\n    var reading = i < streams.length - 1;\n    var writing = i > 0;\n    return destroyer(stream, reading, writing, function (err) {\n      if (!error) error = err;\n      if (err) destroys.forEach(call);\n      if (reading) return;\n      destroys.forEach(call);\n      callback(error);\n    });\n  });\n  return streams.reduce(pipe);\n}\n\nmodule.exports = pipeline;","// toObject with fallback for non-array-like ES3 strings\nvar IndexedObject = require('../internals/indexed-object');\nvar requireObjectCoercible = require('../internals/require-object-coercible');\n\nmodule.exports = function (it) {\n  return IndexedObject(requireObjectCoercible(it));\n};\n","var ciphers = require('./encrypter')\nvar deciphers = require('./decrypter')\nvar modes = require('./modes/list.json')\n\nfunction getCiphers () {\n  return Object.keys(modes)\n}\n\nexports.createCipher = exports.Cipher = ciphers.createCipher\nexports.createCipheriv = exports.Cipheriv = ciphers.createCipheriv\nexports.createDecipher = exports.Decipher = deciphers.createDecipher\nexports.createDecipheriv = exports.Decipheriv = deciphers.createDecipheriv\nexports.listCiphers = exports.getCiphers = getCiphers\n","var r;\n\nmodule.exports = function rand(len) {\n  if (!r)\n    r = new Rand(null);\n\n  return r.generate(len);\n};\n\nfunction Rand(rand) {\n  this.rand = rand;\n}\nmodule.exports.Rand = Rand;\n\nRand.prototype.generate = function generate(len) {\n  return this._rand(len);\n};\n\n// Emulate crypto API using randy\nRand.prototype._rand = function _rand(n) {\n  if (this.rand.getBytes)\n    return this.rand.getBytes(n);\n\n  var res = new Uint8Array(n);\n  for (var i = 0; i < res.length; i++)\n    res[i] = this.rand.getByte();\n  return res;\n};\n\nif (typeof self === 'object') {\n  if (self.crypto && self.crypto.getRandomValues) {\n    // Modern browsers\n    Rand.prototype._rand = function _rand(n) {\n      var arr = new Uint8Array(n);\n      self.crypto.getRandomValues(arr);\n      return arr;\n    };\n  } else if (self.msCrypto && self.msCrypto.getRandomValues) {\n    // IE\n    Rand.prototype._rand = function _rand(n) {\n      var arr = new Uint8Array(n);\n      self.msCrypto.getRandomValues(arr);\n      return arr;\n    };\n\n  // Safari's WebWorkers do not have `crypto`\n  } else if (typeof window === 'object') {\n    // Old junk\n    Rand.prototype._rand = function() {\n      throw new Error('Not implemented yet');\n    };\n  }\n} else {\n  // Node.js or Web worker with no crypto support\n  try {\n    var crypto = require('crypto');\n    if (typeof crypto.randomBytes !== 'function')\n      throw new Error('Not supported');\n\n    Rand.prototype._rand = function _rand(n) {\n      return crypto.randomBytes(n);\n    };\n  } catch (e) {\n  }\n}\n","// iterable DOM collections\n// flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods\nmodule.exports = {\n  CSSRuleList: 0,\n  CSSStyleDeclaration: 0,\n  CSSValueList: 0,\n  ClientRectList: 0,\n  DOMRectList: 0,\n  DOMStringList: 0,\n  DOMTokenList: 1,\n  DataTransferItemList: 0,\n  FileList: 0,\n  HTMLAllCollection: 0,\n  HTMLCollection: 0,\n  HTMLFormElement: 0,\n  HTMLSelectElement: 0,\n  MediaList: 0,\n  MimeTypeArray: 0,\n  NamedNodeMap: 0,\n  NodeList: 1,\n  PaintRequestList: 0,\n  Plugin: 0,\n  PluginArray: 0,\n  SVGLengthList: 0,\n  SVGNumberList: 0,\n  SVGPathSegList: 0,\n  SVGPointList: 0,\n  SVGStringList: 0,\n  SVGTransformList: 0,\n  SourceBufferList: 0,\n  StyleSheetList: 0,\n  TextTrackCueList: 0,\n  TextTrackList: 0,\n  TouchList: 0\n};\n","/* eslint-disable es/no-symbol -- required for testing */\nvar NATIVE_SYMBOL = require('../internals/native-symbol');\n\nmodule.exports = NATIVE_SYMBOL\n  && !Symbol.sham\n  && typeof Symbol.iterator == 'symbol';\n","var global = require('../internals/global');\n\nmodule.exports = global.Promise;\n","module.exports = {\n  generator: require('./mp4-generator'),\n  Transmuxer: require('./transmuxer').Transmuxer,\n  AudioSegmentStream: require('./transmuxer').AudioSegmentStream,\n  VideoSegmentStream: require('./transmuxer').VideoSegmentStream\n};\n","import window from 'global/window';\n\nvar atob = function atob(s) {\n  return window.atob ? window.atob(s) : Buffer.from(s, 'base64').toString('binary');\n};\n\nexport default function decodeB64ToUint8Array(b64Text) {\n  var decodedString = atob(b64Text);\n  var array = new Uint8Array(decodedString.length);\n\n  for (var i = 0; i < decodedString.length; i++) {\n    array[i] = decodedString.charCodeAt(i);\n  }\n\n  return array;\n}"],"sourceRoot":""}